     1                                  ; ****************************************************************************
     2                                  ; TRDOS386.ASM (TRDOS 386 Kernel) - v2.0.7
     3                                  ; ----------------------------------------------------------------------------
     4                                  ; Last Update: 29/11/2023 (Previous: 30/08/2023)
     5                                  ; ----------------------------------------------------------------------------
     6                                  ; Beginning: 04/01/2016
     7                                  ; ----------------------------------------------------------------------------
     8                                  ; Assembler: NASM version 2.15 (trdos386.s)
     9                                  ; ----------------------------------------------------------------------------
    10                                  ; Turkish Rational DOS
    11                                  ; Operating System Project v2.0 by ERDOGAN TAN (Beginning: 04/01/2016)
    12                                  ;
    13                                  ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    14                                  ; unix386.s (03/01/2016)
    15                                  ;
    16                                  ; Derived from TRDOS Operating System v1.0 (8086) source code by Erdogan Tan
    17                                  ; TRDOS2.ASM (09/11/2011)
    18                                  ; 
    19                                  ; Derived from 'IBM PC-XT-286' BIOS source code (1986) 
    20                                  ; ****************************************************************************
    21                                  ; nasm trdos386.s -l trdos386.txt -o TRDOS386.SYS
    22                                  
    23                                  KLOAD	equ 10000h ; Kernel loading address
    24                                  	; NOTE: Retro UNIX 8086 v1 boot code loads kernel at 1000h:0000h 
    25                                  KCODE	equ 08h	; Code segment descriptor (ring 0)
    26                                  KDATA	equ 10h	; Data segment descriptor (ring 0)
    27                                  ; 19/03/2015
    28                                  UCODE	equ 1Bh ; 18h + 3h  (ring 3)
    29                                  UDATA	equ 23h ; 20h + 3h  (ring 3)
    30                                  ; 24/03/2015
    31                                  TSS	equ 28h	; Task state segment descriptor (ring 0)
    32                                  ; 19/03/2015
    33                                  CORE	equ 400000h  ; Start of USER's virtual/linear address space 
    34                                  		     ; (at the end of the 1st 4MB)
    35                                  ECORE	equ 0FFC00000h ; End of USER's virtual address space (4GB - 4MB)
    36                                  		     ; ULIMIT = (ECORE/4096) - 1 = 0FFBFFh (in GDT)
    37                                  ;; 27/12/2013
    38                                  ;KEND	equ KLOAD + 65536 ; (28/12/2013) (end of kernel space)
    39                                  ; 04/07/2016
    40                                  KEND    equ KERNELFSIZE + KLOAD
    41                                  
    42                                  ; IBM PC/AT BIOS ----- 10/06/85 (postequ.inc)
    43                                  ;--------- CMOS TABLE LOCATION ADDRESS'S -------------------------------------
    44                                  CMOS_SECONDS	EQU	00H		; SECONDS (BCD)
    45                                  CMOS_SEC_ALARM	EQU	01H		; SECONDS ALARM (BCD)
    46                                  CMOS_MINUTES	EQU	02H		; MINUTES (BCD)
    47                                  CMOS_MIN_ALARM	EQU	03H		; MINUTES ALARM (BCD) 	
    48                                  CMOS_HOURS	EQU	04H		; HOURS (BCD
    49                                  CMOS_HR_ALARM	EQU	05H		; HOURS ALARM   (BCD)
    50                                  CMOS_DAY_WEEK	EQU	06H		; DAY OF THE WEEK  (BCD)
    51                                  CMOS_DAY_MONTH	EQU	07H		; DAY OF THE MONTH (BCD) 
    52                                  CMOS_MONTH	EQU	08H		; MONTH (BCD)
    53                                  CMOS_YEAR	EQU	09H		; YEAR (TWO DIGITS) (BCD)
    54                                  CMOS_CENTURY	EQU	32H		; DATE CENTURY BYTE (BCD)
    55                                  CMOS_REG_A	EQU	0AH		; STATUS REGISTER A
    56                                  CMOS_REG_B	EQU	0BH		; STATUS REGISTER B  ALARM
    57                                  CMOS_REG_C	EQU	0CH		; STATUS REGISTER C  FLAGS
    58                                  CMOS_REG_D	EQU	0DH		; STATUS REGISTER D  BATTERY
    59                                  CMOS_SHUT_DOWN	EQU	0FH		; SHUTDOWN STATUS COMMAND BYTE
    60                                  ;----------------------------------------
    61                                  ;	CMOS EQUATES FOR THIS SYSTEM	;
    62                                  ;-----------------------------------------------------------------------------
    63                                  CMOS_PORT	EQU	070H		; I/O ADDRESS OF CMOS ADDRESS PORT
    64                                  CMOS_DATA	EQU	071H		; I/O ADDRESS OF CMOS DATA PORT
    65                                  NMI		EQU	10000000B	; DISABLE NMI INTERRUPTS MASK -
    66                                  					; HIGH BIT OF CMOS LOCATION ADDRESS
    67                                  
    68                                  ; Memory Allocation Table Address
    69                                  ; 05/11/2014
    70                                  ; 31/10/2014
    71                                  MEM_ALLOC_TBL	equ	100000h		; Memory Allocation Table at the end of
    72                                  					; the 1st 1 MB memory space.
    73                                  					; (This address must be aligned
    74                                  					;  on 128 KB boundary, if it will be
    75                                  					;  changed later.)
    76                                  					; ((lower 17 bits of 32 bit M.A.T.
    77                                  					;   address must be ZERO)).
    78                                  					; ((((Reason: 32 bit allocation 
    79                                  					;     instructions, dword steps)))
    80                                  					; (((byte >> 12 --> page >> 5)))  
    81                                  ;04/11/2014	
    82                                  PDE_A_PRESENT	equ	1		; Present flag for PDE
    83                                  PDE_A_WRITE	equ 	2		; Writable (write permission) flag
    84                                  PDE_A_USER	equ	4		; User (non-system/kernel) page flag
    85                                  ;
    86                                  PTE_A_PRESENT	equ	1		; Present flag for PTE (bit 0)
    87                                  PTE_A_WRITE	equ 	2		; Writable (write permission) flag (bit 1)
    88                                  PTE_A_USER	equ	4		; User (non-system/kernel) page flag (bit 2)
    89                                  PTE_A_ACCESS    equ	32		; Accessed flag (bit 5) ; 09/03/2015
    90                                  
    91                                  ; 17/02/2015 (unix386.s)
    92                                  ; 10/12/2014 - 30/12/2014 (0B000h -> 9000h) (dsectrm2.s)
    93                                  DPT_SEGM equ 09000h  ; FDPT segment (EDD v1.1, EDD v3)
    94                                  ;
    95                                  HD0_DPT	 equ 0	    ; Disk parameter table address for hd0
    96                                  HD1_DPT	 equ 32	    ; Disk parameter table address for hd1
    97                                  HD2_DPT	 equ 64	    ; Disk parameter table address for hd2
    98                                  HD3_DPT	 equ 96	    ; Disk parameter table address for hd3
    99                                  
   100                                  ; 15/11/2020
   101                                  VBE3INFOSEG equ 97E0h ; 512 bytes before Video_Pg_Backup
   102                                  ; 15/12/2020
   103                                  VBE3MODEINFOSEG equ 97C0h ; 512 bytes before VBE3INFOBLOCK 
   104                                  
   105                                  ; 29/11/2020
   106                                  VBE3INFOBLOCK equ 97E00h ; linear address (512 bytes)
   107                                  VBE3MODEINFOBLOCK equ 97C00h ; linear address (256 bytes)
   108                                  VBE3SAVERESTOREBLOCK equ 97600h ; linear address (2048 bytes)
   109                                  VBE3CRTCINFOBLOCK equ 97D80h ; linear address (64 bytes) ; 17/01/2021 
   110                                  VBE3BIOSDATABLOCK equ 97000h ; linear address (1536 bytes)
   111                                  VBE3STACKADDR equ 96000h ; linear address (1024 bytes)
   112                                  ; VBE3 32 bit Protected Mode Interface (16 bit) Selectors (in GDT)
   113                                  VBE3CS equ 30h ; _vbe3_CS:
   114                                  VBE3BDS equ 38h ; _vbe3_BDS:
   115                                  VBE3A000 equ 40h ; _A0000Sel:
   116                                  VBE3B000 equ 48h ; _B0000Sel:
   117                                  VBE3B800 equ 50h ; _B8000Sel:
   118                                  VBE3DS equ 58h ; _vbe3_DS:
   119                                  VBE3SS equ 60h ; _vbe3_SS:
   120                                  VBE3ES equ 68h ; _vbe3_ES:
   121                                  KCODE16 equ 70h ; _16bit_CS:
   122                                  ; 14/01/2021
   123                                  ; 06/12/2020
   124                                  VBE3VIDEOSTATE equ 95800h ; 2048 bytes
   125                                  ; 05/01/2021
   126                                  VGAFONT16USER equ 94000h ; 8x16 pixels user font (256 chars)	
   127                                  			 ; (reserved/allocated font space: 4096 bytes) 
   128                                  
   129                                  VGAFONT8USER equ 95000h	; 8x8 pixels user font (256 chars)	
   130                                  			; (reserved/allocated font space: 2048 bytes)
   131                                  ; 17/01/2021
   132                                  ; temporary (initial) location for EDID information
   133                                  VBE3EDIDINFOBLOCK equ 97D00h ; linear address (128 bytes)
   134                                   
   135                                  ; FDPT (Phoenix, Enhanced Disk Drive Specification v1.1, v3.0)
   136                                  ;      (HDPT: Programmer's Guide to the AMIBIOS, 1993)
   137                                  ;
   138                                  FDPT_CYLS	equ 0 ; 1 word, number of cylinders
   139                                  FDPT_HDS	equ 2 ; 1 byte, number of heads
   140                                  FDPT_TT		equ 3 ; 1 byte, A0h = translated FDPT with logical values
   141                                  		      ; otherwise it is standard FDPT with physical values 	
   142                                  FDPT_PCMP	equ 5 ; 1 word, starting write precompensation cylinder
   143                                  		      ; (obsolete for IDE/ATA drives)
   144                                  FDPT_CB		equ 8 ; 1 byte, drive control byte
   145                                  			; Bits 7-6 : Enable or disable retries (00h = enable)
   146                                  			; Bit 5	: 1 = Defect map is located at last cyl. + 1
   147                                  			; Bit 4 : Reserved. Always 0
   148                                  			; Bit 3 : Set to 1 if more than 8 heads
   149                                  			; Bit 2-0 : Reserved. Always 0
   150                                  FDPT_LZ		equ 12 ; 1 word, landing zone (obsolete for IDE/ATA drives)
   151                                  FDPT_SPT	equ 14 ; 1 byte, sectors per track
   152                                  
   153                                  ; Floppy Drive Parameters Table (Programmer's Guide to the AMIBIOS, 1993)
   154                                  ; (11 bytes long) will be used by diskette handler/bios
   155                                  ; which is derived from IBM PC-AT BIOS (DISKETTE.ASM, 21/04/1986).
   156                                  
   157                                  ; 01/02/2016
   158                                  Logical_DOSDisks equ 90000h + 100h ; 26*256 = 6656 bytes
   159                                  Directory_Buffer equ 80000h ; max = 64K Bytes
   160                                  FAT_Buffer	 equ 91C00h ; 1536 bytes (3 sectors)
   161                                  ; 15/02/2016
   162                                  Cluster_Buffer	 equ 70000h ; max = 64K Bytes ; buffer for file read & write
   163                                  ; 11/04/2016
   164                                  Env_Page:	 equ 93000h ; 512 bytes (4096 bytes)
   165                                  Env_Page_Size	 equ 512    ; (4096 bytes)
   166                                  ; 30/07/2016
   167                                  Video_Pg_Backup	 equ 98000h ; Mode 3h, video page backup (32K, 8 pages)
   168                                  
   169                                  ; 29/11/2020
   170                                  ; Free/Reserved memory blocks (in 1st 1MB): 93200h to 96000h (available)
   171                                  ; 06/12/2020
   172                                  ; Free/Reserved memory blocks (in 1st 1MB): 93200h to 95800h (available)
   173                                  
   174                                  ; 15/12/2020
   175                                  LFB_ADDR	equ LFB_Info+LFBINFO.LFB_addr
   176                                  LFB_SIZE	equ LFB_Info+LFBINFO.LFB_size
   177                                  
   178                                  ; 29/08/2023 - TRDOS 386 v2.0.6
   179                                  	; 30/11/2020
   180                                  	; 29/11/2020 - TRDOS 386 v2.0.3
   181                                  
   182                                  struc PMInfo  ;  VESA VBE3 PMInfoBlock ('PMID' block)
   183                                  
   184 00000000 ????????                 .Signature:	resb 4  ; db 'PMID' ; PM Info Block Signature
   185 00000004 ????                     .EntryPoint:	resw 1	; Offset of PM entry point within BIOS
   186 00000006 ????                     .PMInitialize: resw 1	; Offset of PM initialization entry point
   187 00000008 ????                     .BIOSDataSel:	resw 1 	; Selector to BIOS data area emulation block
   188 0000000A ????                     .A0000Sel:	resw 1	; Selector to access A0000h physical mem
   189 0000000C ????                     .B0000Sel:	resw 1  ; Selector to access B0000h physical mem
   190 0000000E ????                     .B8000Sel:	resw 1	; Selector to access B8000h physical mem
   191 00000010 ????                     .CodeSegSel:	resw 1	; Selector to access code segment as data
   192 00000012 ??                       .InProtectMode: resb 1 ; Set to 1 when in protected mode
   193 00000013 ??                       .Checksum:	resb 1	; Checksum byte for structure
   194                                   .size:
   195                                  
   196                                  endstruc
   197                                   
   198                                  [BITS 16]       ; We need 16-bit intructions for Real mode
   199                                  
   200                                  [ORG 0] 
   201                                  	; 12/11/2014
   202                                  	; Save boot drive number (that is default root drive)
   203 00000000 8816[7865]              	mov	[boot_drv], dl ; physical drv number
   204                                  
   205                                  	; Determine installed memory
   206                                  	; 31/10/2014
   207                                  	;
   208 00000004 B801E8                  	mov	ax, 0E801h ; Get memory size 
   209 00000007 CD15                    	int	15h	   ; for large configurations
   210 00000009 7308                    	jnc	short chk_ms
   211 0000000B B488                    	mov	ah, 88h    ; Get extended memory size 
   212 0000000D CD15                    	int	15h
   213                                  	;	   
   214                                  	;mov	al, 17h	; Extended memory (1K blocks) low byte
   215                                  	;out	70h, al ; select CMOS register
   216                                  	;in	al, 71h ; read data (1 byte)
   217                                  	;mov	cl, al
   218                                  	;mov	al, 18h ; Extended memory (1K blocks) high byte
   219                                  	;out	70h, al ; select CMOS register
   220                                  	;in	al, 71h ; read data (1 byte)
   221                                  	;mov	ch, al
   222                                   	;      
   223 0000000F 89C1                    	mov	cx, ax
   224 00000011 31D2                    	xor	dx, dx
   225                                  chk_ms:
   226 00000013 890E[7465]              	mov	[mem_1m_1k], cx
   227 00000017 8916[7665]              	mov	[mem_16m_64k], dx
   228                                  	; 24/11/2023
   229 0000001B 8916[F40E]              	mov	[real_mem_16m_64k], dx
   230                                  
   231                                  	; 05/11/2014
   232                                  	;and	dx, dx
   233                                  	;jz	short L2
   234 0000001F 81F90004                        cmp     cx, 1024
   235                                  	;jnb	short L0
   236 00000023 7351                    	jnb	short V0 ; 14/11/2020
   237                                  		 ; insufficient memory_error	
   238                                  		 ; Minimum 2 MB memory is needed... 
   239                                  	; 05/11/2014
   240                                  	; (real mode error printing)
   241 00000025 FB                      	sti
   242 00000026 BE[3A00]                	mov	si, msg_out_of_memory
   243 00000029 BB0700                  	mov	bx, 7
   244 0000002C B40E                    	mov	ah, 0Eh	; write tty
   245                                  oom_1:
   246 0000002E AC                      	lodsb
   247 0000002F 08C0                    	or	al, al
   248 00000031 7404                    	jz	short oom_2
   249 00000033 CD10                    	int	10h
   250 00000035 EBF7                    	jmp	short oom_1
   251                                  oom_2:
   252 00000037 F4                              hlt
   253 00000038 EBFD                    	jmp	short oom_2
   254                                  
   255                                  ; 20/02/2017
   256                                  ; 05/11/2014
   257                                  msg_out_of_memory:
   258 0000003A 070D0A                  	db 	07h, 0Dh, 0Ah
   259 0000003D 496E73756666696369-             db      'Insufficient memory !'
   259 00000046 656E74206D656D6F72-
   259 0000004F 792021             
   260 00000052 0D0A                    	db	0Dh, 0Ah
   261                                  _int13h_48h_buffer: ; 07/07/2016
   262 00000054 284D696E696D756D20-     	db	'(Minimum 2MB memory is needed.)'
   262 0000005D 324D42206D656D6F72-
   262 00000066 79206973206E656564-
   262 0000006F 65642E29           
   263 00000073 0D0A00                   	db	0Dh, 0Ah, 0
   264                                  V0:
   265                                  	; 18/10/2023 - TRDOS 386 v2.0.7
   266                                  	; set video mode to 03h again 
   267                                  	; (to reset video bios data in ROMBIOS DATA AREA)
   268 00000076 B80300                  	mov	ax, 3
   269 00000079 CD10                    	int	10h
   270                                  	; copy IVT and ROMBIOS DATA AREA to VBE3 BIOS data area
   271 0000007B BF0097                  	mov	di, VBE3BIOSDATABLOCK>>4
   272 0000007E 8EC7                    	mov	es, di
   273 00000080 31F6                    	xor	si, si
   274 00000082 31FF                    	xor	di, di
   275 00000084 8EDE                    	mov	ds, si ; 0
   276 00000086 B90003                  	mov	cx, 300h ; 600h / 2
   277 00000089 F3A5                    	rep	movsw
   278 0000008B 0E                      	push	cs
   279 0000008C 1F                      	pop	ds
   280                                  	
   281                                  	; 24/11/2023
   282                                  	; 15/12/2020
   283                                  	;mov	si, [mem_16m_64k]
   284                                  	;mov	[real_mem_16m_64k], si
   285                                  	
   286                                  	; 15/11/2020
   287                                  	; 14/11/2020 (TRDOS 386 v2.0.3)
   288                                  	; check VESA (VBE) VIDEO BIOS version
   289                                  
   290 0000008D B8034F                  	mov	ax, 4F03h  ; Return current VBE mode
   291 00000090 CD10                    	int	10h
   292 00000092 83F84F                  	cmp	ax, 004Fh  ; successful (vbe) function call
   293                                  	;jne	short L0   ; not a VESA VBE compatible bios	
   294                                  	; 18/10/2023
   295 00000095 7561                    	jne	short V1   ; restore es
   296                                  
   297                                  	; 27/11/2023
   298                                  	; 24/11/2023 - temporary
   299                                  	;jmp	short V1
   300                                  
   301                                  	;mov	ah, 3
   302                                  	;;jmp	short V1	
   303                                  	
   304                                  	; 15/11/2020
   305 00000097 BBE097                  	mov	bx, VBE3INFOSEG  ; 97E0h for current version 
   306 0000009A 8EC3                    	mov	es, bx
   307 0000009C 31FF                    	xor	di, di
   308 0000009E 2666C70556424532        	mov	dword [es:di], 'VBE2' ; request VESA VBE3 info
   309                                  		; es:di = buffer address (512 bytes)
   310                                  	;mov	ax, 4F00h ; Return VBE controller information
   311 000000A6 86C4                    	xchg	al, ah
   312 000000A8 CD10                    	int	10h
   313                                  	
   314                                  	; dx = cs
   315                                  	; es = VBE3INFOSEG (97E0h)
   316                                  	; di = 0
   317                                  	; ss = (endofkernelfile/16)+16
   318                                  	; sp = 0FFFEh
   319                                  
   320 000000AA 83F84F                  	cmp	ax, 004Fh
   321 000000AD 7549                    	jne	short V1 ; old vga bios (not VESA compatible)
   322                                  
   323                                  	; 15/11/2020
   324 000000AF 2666813D56455341        	cmp	dword [es:di], 'VESA'
   325 000000B7 753F                    	jne	short V1
   326                                  	
   327                                  	;mov	ax, [es:di+4]
   328                                  	;	; ax = vbe version in BCD format (0200h or 0300h)
   329                                  	;mov	[vbe3], ah ; version number (major) 	
   330                                  
   331                                  	; 15/11/2020
   332 000000B9 268A4505                	mov	al, [es:di+5]
   333                                  		; al = high byte of VBE version number (02h or 03h)
   334                                  
   335 000000BD A2[6409]                	mov	[vbe3], al ; version number (major) 	
   336                                  			   ; 02h or 03h is expected
   337                                  	; 17/01/2021
   338                                  	; Read EDID
   339 000000C0 B301                    	mov	bl, 01h	; Read EDID
   340 000000C2 31C9                    	xor	cx, cx	; Controller unit number
   341                                  			; (00 = primary controller)
   342 000000C4 31D2                    	xor	dx, dx	; EDID block number = 0
   343 000000C6 B8C097                  	mov	ax, VBE3MODEINFOSEG  ; 97C0h for current version
   344 000000C9 8EC0                    	mov	es, ax
   345 000000CB BF0001                  	mov	di, VBE3EDIDINFOBLOCK - VBE3MODEINFOBLOCK
   346                                  	; es:di = temporary address of 128 bytes EDID information 
   347 000000CE B8154F                  	mov	ax, 4F15h ; VBE/DDC Services 
   348 000000D1 CD10                    	int	10h
   349                                  	;cmp	ax, 4Fh
   350                                  	;jne	short v2
   351 000000D3 A2[AF41]                	mov	[edid], al ; 4Fh > 0	
   352                                  ;V2:
   353                                  	; 17/01/2021
   354 000000D6 31FF                    	xor	di, di
   355                                  	; 15/12/2020
   356                                  	; Get linear frame buffer info (for VESA VBE mode 118h)
   357                                  	;mov	si, VBE3MODEINFOSEG  ; 97C0h for current version
   358                                  	;mov	es, si
   359                                   	; di = 0
   360 000000D8 B91841                  	mov	cx, 04118h  ; 1024*768, 24 bpp, LFB
   361 000000DB B8014F                  	mov	ax, 4F01h ; Return VBE mode information
   362 000000DE CD10                    	int	10h
   363                                  	;cmp	ax, 4Fh
   364                                  	;jne	short V1
   365                                  	; 19/12/2020
   366                                  	;mov	si, [es:di+MODEINFO.PhysBasePtr+2]
   367                                  			; hw of LFB base address
   368                                  	; MODEINFO structure starts from offset -2
   369 000000E0 268B752A                	mov	si, [es:di+MODEINFO.PhysBasePtr] ; hw of LFB addr
   370 000000E4 8936[F60E]              	mov	[def_LFB_addr], si ; k_LFB_size = 3145728 bytes
   371 000000E8 81EE0001                	sub	si, 256
   372                                  	
   373                                  	; 15/12/2020
   374                                  	; check memory and decrease it to 3.5 GB if it is 4GB
   375                                  	; (reserve upper memory for LFB)
   376 000000EC 8B3E[7665]              	mov	di, [mem_16m_64k]
   377                                  	; 24/11/2023
   378                                  	;mov	[real_mem_16m_64k], di
   379                                  
   380 000000F0 39F7                    	cmp	di, si
   381 000000F2 7604                    	jna	short V1
   382                                  
   383 000000F4 8936[7665]              	mov	[mem_16m_64k], si
   384                                  
   385                                  	; VESA VBE3 video hardware 
   386                                  	; (example: NVIDIA GEFORCE FX550, 256 MB)
   387                                  	; uses upper memory from 0D0000000h to 0DFFFFFFFh
   388                                  	
   389                                  	;;cmp	di, 0CF00h ; 3328 MB - 16MB
   390                                  	;jna	short V1  ; <= 3328 MB memory, it is not required
   391                                  			  ; decrease
   392                                  	;cmp	al, 3 
   393                                  	;jb	short V2 
   394                                  	; VESA VBE 3
   395                                  	;mov	word [mem_16m_64k], 0CF00h ; 3328 MB - 16MB
   396                                  	;jmp	short V1 	
   397                                  ;V2:
   398                                  	; VESA VBE 2
   399                                  	; Check Bochs/Qemu/VirtualBox Emulator
   400                                  	; LFB base address: 0E0000000h
   401                                  	;sub	ax, ax ; 0
   402                                  	;mov	dx, 1CEh ; VBE_DISPI_IOPORT_INDEX
   403                                  	;out	dx, ax ; VBE_DISPI_INDEX_ID register
   404                                  	;inc	dx
   405                                  	;in	ax, dx
   406                                  	;and	al, 0F0h
   407                                  	;cmp	ax, 0B0C0h
   408                                  	;jne	short V1
   409                                  	;
   410                                  	; BOCHS/QEMU/VIRTUALBOX
   411                                  	;mov	word [mem_16m_64k], 0DF00h ; 3584 MB - 16MB	
   412                                  V1:
   413 000000F8 1E                      	push	ds
   414 000000F9 07                      	pop	es ; restore extra data segment	
   415                                  L0:
   416                                  
   417                                  %include 'diskinit.s' ; 07/03/2015
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel) - v2.0.5 - diskinit.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 09/08/2022 (Previous: 29/08/2020 - Kernel v2.0.4)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 24/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Turkish Rational DOS
    11                              <1> ; Operating System Project v2.0 by ERDOGAN TAN (Beginning: 04/01/2016)
    12                              <1> ;
    13                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    14                              <1> ; diskinit.inc (10/07/2015)
    15                              <1> ;
    16                              <1> ; Derived from 'IBM PC-XT-286' BIOS source code (1986) 
    17                              <1> ; ****************************************************************************
    18                              <1> 
    19                              <1> ; Retro UNIX 386 v1 Kernel - DISKINIT.INC
    20                              <1> ; Last Modification: 12/07/2022 (Previous: 10/07/2015)
    21                              <1> 
    22                              <1> ; DISK I/O SYSTEM INITIALIZATION - Erdogan Tan (Retro UNIX 386 v1 project)
    23                              <1> 
    24                              <1> ; ///////// DISK I/O SYSTEM STRUCTURE INITIALIZATION ///////////////
    25                              <1> 
    26                              <1> 	; 09/08/2022
    27                              <1> 	; 08/08/2022
    28                              <1> 	; 14/07/2022 (TRDOS 386 v2.0.5)
    29                              <1> 	; 12/07/2022 (Retro UNIX 386 v1.2)
    30                              <1> 	; 29/08/2020
    31                              <1> 	; 17/07/2020
    32                              <1> 	; 14/07/2020 (TRDOS 386 v2.0.2)
    33                              <1> 	; 10/12/2014 - 02/02/2015 - dsectrm2.s
    34                              <1> ;L0:
    35                              <1> 	; 12/11/2014 (Retro UNIX 386 v1 - beginning)
    36                              <1> 	; Detecting disk drives... (by help of ROM-BIOS)
    37 000000FA BA7F00              <1> 	mov	dx, 7Fh
    38                              <1> L1:	
    39 000000FD FEC2                <1> 	inc	dl
    40 000000FF B441                <1> 	mov	ah, 41h ; Check extensions present
    41                              <1> 			; Phoenix EDD v1.1 - EDD v3
    42 00000101 BBAA55              <1> 	mov	bx, 55AAh
    43 00000104 CD13                <1> 	int 	13h
    44 00000106 721A                <1> 	jc	short L2
    45                              <1> 
    46 00000108 81FB55AA            <1> 	cmp	bx, 0AA55h
    47 0000010C 7514                <1> 	jne	short L2
    48 0000010E FE06[7B65]          <1> 	inc	byte [hdc]	; count of hard disks (EDD present)
    49 00000112 8816[7A65]          <1>         mov     [last_drv], dl  ; last hard disk number
    50 00000116 BB[FE64]            <1> 	mov	bx, hd0_type - 80h
    51 00000119 01D3                <1> 	add	bx, dx	 
    52 0000011B 880F                <1> 	mov	[bx], cl ; Interface support bit map in CX
    53                              <1> 			 ; Bit 0 - 1, Fixed disk access subset ready
    54                              <1> 			 ; Bit 1 - 1, Drv locking and ejecting ready
    55                              <1> 			 ; Bit 2 - 1, Enhanced Disk Drive Support
    56                              <1>                          ;            (EDD) ready (DPTE ready)
    57                              <1> 			 ; Bit 3 - 1, 64bit extensions are present
    58                              <1>                          ;            (EDD-3)
    59                              <1> 			 ; Bit 4 to 15 - 0, Reserved
    60 0000011D 80FA83              <1> 	cmp	dl, 83h	 ; drive number < 83h
    61 00000120 72DB                <1> 	jb	short L1
    62                              <1> L2:
    63                              <1> 	; 23/11/2014
    64                              <1> 	; 19/11/2014
    65 00000122 30D2                <1> 	xor	dl, dl  ; 0
    66                              <1> 	; 04/02/2016 (esi -> si)
    67 00000124 BE[7C65]            <1> 	mov	si, fd0_type
    68                              <1> L3:
    69                              <1> 	; 14/01/2015
    70 00000127 8816[7965]          <1> 	mov	[drv], dl
    71                              <1> 	;
    72 0000012B B408                <1> 	mov 	ah, 08h ; Return drive parameters
    73 0000012D CD13                <1> 	int	13h	
    74 0000012F 7210                <1> 	jc	short L4
    75                              <1> 		; BL = drive type (for floppy drives)
    76                              <1> 		; DL = number of floppy drives
    77                              <1> 		;		
    78                              <1> 		; ES:DI = Address of DPT from BIOS
    79                              <1> 		;
    80 00000131 881C                <1> 	mov	[si], bl ;  Drive type
    81                              <1> 			; 4 = 1.44 MB, 80 track, 3 1/2"
    82                              <1> 	; 14/01/2015
    83 00000133 E8DD01              <1> 	call	set_disk_parms
    84                              <1> 	; 10/12/2014
    85 00000136 81FE[7C65]          <1> 	cmp	si, fd0_type
    86 0000013A 7705                <1> 	ja	short L4
    87 0000013C 46                  <1> 	inc	si ; fd1_type
    88 0000013D B201                <1> 	mov	dl, 1
    89 0000013F EBE6                <1> 	jmp	short L3
    90                              <1> L4:
    91 00000141 B27F                <1> 	mov	dl, 7Fh
    92                              <1> 	; 24/12/2014
    93 00000143 803E[7B65]00        <1> 	cmp	byte [hdc], 0 ; EDD present or not ?	
    94                              <1> 	;ja	L10	  ; yes, all fixed disk operations
    95                              <1> 			  ; will be performed according to
    96                              <1> 			  ; present EDD specification
    97                              <1> 	; 14/07/2022
    98 00000148 7603                <1> 	jna	short L5
    99 0000014A E98B00              <1> 	jmp	L10
   100                              <1> 
   101                              <1> L5:
   102                              <1> 	; 17/07/2020
   103                              <1> 	; Note: Virtual CPU will not come here while 
   104                              <1> 	; running in QEMU, Bochs, VirtualBox emulators !!!
   105                              <1> 	
   106                              <1> 	; 17/07/2020
   107                              <1> 	; Older BIOS (INT 13h, AH = 48h is not available)
   108                              <1> 
   109 0000014D FEC2                <1> 	inc 	dl
   110 0000014F 8816[7965]          <1>         mov     [drv], dl
   111 00000153 8816[7A65]          <1>         mov     [last_drv], dl ; 14/01/2015
   112 00000157 B408                <1> 	mov 	ah, 08h ; Return drive parameters
   113 00000159 CD13                <1> 	int	13h	; (conventional function)
   114                              <1> 	;jc	L13	; fixed disk drive not ready
   115                              <1> 	; 14/07/2022
   116 0000015B 7303                <1> 	jnc	short L6
   117 0000015D E9A501              <1> 	jmp	L13
   118                              <1> L6:
   119 00000160 8816[7B65]          <1>         mov     [hdc], dl ; number of drives
   120                              <1> 	;; 14/01/2013
   121                              <1> 	;;push	cx
   122 00000164 E8AC01              <1> 	call	set_disk_parms
   123                              <1> 	;;pop	cx
   124                              <1> 	;
   125                              <1> 	;;and	cl, 3Fh	 ; sectors per track (bits 0-6)
   126 00000167 8A16[7965]          <1>         mov     dl, [drv]
   127 0000016B BB0401              <1> 	mov	bx, 65*4 ; hd0 parameters table (INT 41h)	
   128 0000016E 80FA80              <1> 	cmp	dl, 80h
   129 00000171 7603                <1> 	jna	short L7
   130 00000173 83C314              <1> 	add	bx, 5*4	 ; hd1 parameters table (INT 46h)
   131                              <1> L7:	
   132 00000176 31C0                <1> 	xor	ax, ax
   133 00000178 8ED8                <1> 	mov	ds, ax
   134 0000017A 8B37                <1>         mov     si, [bx]
   135 0000017C 8B4702              <1>         mov     ax, [bx+2] 
   136 0000017F 8ED8                <1> 	mov	ds, ax
   137 00000181 3A4C0E              <1>         cmp     cl, [si+FDPT_SPT] ; sectors per track 
   138                              <1> 	;jne	L12 ; invalid FDPT
   139                              <1> 	; 14/07/2022
   140 00000184 7403                <1> 	je	short L7_8
   141 00000186 E97801              <1> 	jmp	L12
   142                              <1> L7_8:
   143 00000189 BF0000              <1> 	mov	di, HD0_DPT
   144 0000018C 80FA80              <1> 	cmp	dl, 80h
   145 0000018F 7603                <1> 	jna	short L8
   146 00000191 BF2000              <1> 	mov	di, HD1_DPT 
   147                              <1> L8:
   148                              <1> 	; 30/12/2014
   149 00000194 B80090              <1> 	mov	ax, DPT_SEGM
   150 00000197 8EC0                <1> 	mov	es, ax
   151                              <1> 	; 24/12/2014
   152 00000199 B90800              <1> 	mov	cx, 8
   153 0000019C F3A5                <1> 	rep	movsw  ; copy 16 bytes to the kernel's DPT location
   154 0000019E 8CC8                <1> 	mov	ax, cs
   155 000001A0 8ED8                <1> 	mov	ds, ax
   156                              <1> 
   157                              <1> 	; 02/02/2015
   158                              <1> 	;mov	cl, [drv]
   159                              <1> 	;mov	bl, cl
   160                              <1> 	;mov	ax, 1F0h
   161                              <1> 	;and	bl, 1
   162                              <1> 	;jz	short L9
   163                              <1> 	;shl	bl, 4
   164                              <1> 	;sub	ax, 1F0h-170h
   165                              <1> 
   166                              <1> 	; 17/07/2020 
   167                              <1> 	; (Only 1F0h port address must be valid for old ROM BIOSes)
   168 000001A2 B8F001              <1> 	mov	ax, 1F0h
   169 000001A5 B3A0                <1> 	mov	bl, 0A0h
   170 000001A7 80FA80              <1> 	cmp	dl, 80h
   171 000001AA 7603                <1> 	jna	short L9
   172                              <1> 	; dl = 81h
   173 000001AC 80C310              <1> 	add	bl, 10h  ; slave disk
   174                              <1> 	;sub	ax, 1F0h-170h
   175                              <1> L9:
   176 000001AF AB                  <1> 	stosw	; I/O PORT Base Address (1F0h, 170h)
   177 000001B0 050602              <1> 	add	ax, 206h
   178 000001B3 AB                  <1> 	stosw	; CONTROL PORT Address (3F6h, 376h)	
   179 000001B4 88D8                <1> 	mov	al, bl  ; bit 4, master/slave disk bit
   180                              <1> 	;add	al, 0A0h ; 17/07/2020
   181 000001B6 AA                  <1> 	stosb	; Device/Head Register upper nibble
   182                              <1> 	;
   183 000001B7 FE06[7965]          <1> 	inc	byte [drv]
   184                              <1> 	;mov	bx, hd0_type - 80h
   185                              <1> 	;add	bx, cx
   186                              <1> 	; 09/08/2022 - BugFix
   187 000001BB 30FF                <1> 	xor	bh, bh
   188 000001BD 88D3                <1> 	mov	bl, dl
   189 000001BF 81C3[FE64]          <1> 	add	bx, hd0_type - 80h
   190 000001C3 800F80              <1> 	or      byte [bx], 80h  ; present sign (when lower nibble is 0)
   191 000001C6 A0[7B65]            <1> 	mov	al, [hdc]
   192 000001C9 FEC8                <1> 	dec	al
   193                              <1> 	;jz	L13
   194                              <1> 	; 14/07/2022
   195 000001CB 7408                <1> 	jz	short L9_10
   196 000001CD 80FA80              <1> 	cmp	dl, 80h
   197                              <1>         ;jna	L5 ; Max. 2 hard disks  ; 17/07/2020
   198                              <1> 	; 14/07/2022
   199 000001D0 7703                <1> 	ja	short L9_10
   200 000001D2 E978FF              <1> 	jmp	L5
   201                              <1> L9_10:
   202 000001D5 E92D01              <1>         jmp     L13
   203                              <1> L10:
   204 000001D8 FEC2                <1> 	inc 	dl
   205                              <1> 	; 25/12/2014
   206 000001DA 8816[7965]          <1> 	mov	[drv], dl
   207 000001DE B408                <1> 	mov 	ah, 08h ; Return drive parameters
   208 000001E0 CD13                <1> 	int	13h	; (conventional function)
   209                              <1> 	;jc	L13
   210                              <1> 	; 14/07/2022
   211 000001E2 72F1                <1> 	jc	short L9_10
   212                              <1> 	; 14/01/2015
   213                              <1> 	;mov	dl, [drv]
   214                              <1> 	; 09/08/2022
   215                              <1> 	;push	dx
   216 000001E4 51                  <1> 	push	cx
   217 000001E5 E82B01              <1> 	call	set_disk_parms
   218 000001E8 59                  <1> 	pop	cx
   219                              <1> 	;pop	dx
   220                              <1> 	; 09/08/2022
   221 000001E9 8A16[7965]          <1> 	mov	dl, [drv]	
   222                              <1> 	; 06/07/2016 (BugFix for >64K kernel files)
   223                              <1> 	; 04/02/2016 (esi -> si)
   224                              <1> 	;mov	si, _end ; 30 byte temporary buffer address 	
   225                              <1> 	;		 ; at the '_end' of kernel.
   226                              <1> 	;mov	word [si], 30
   227                              <1> 	; 06/07/2016
   228 000001ED BE[5400]            <1> 	mov	si, _int13h_48h_buffer
   229                              <1> 	; 09/07/2016
   230 000001F0 B81E00              <1> 	mov	ax, 001Eh
   231 000001F3 8824                <1> 	mov	[si], ah ; 0
   232 000001F5 46                  <1> 	inc	si
   233 000001F6 8904                <1> 	mov	[si], ax
   234                              <1>  	; word [si] = 30
   235                              <1> 	;
   236 000001F8 B448                <1> 	mov	ah, 48h	 ; Get drive parameters (EDD function)
   237 000001FA CD13                <1> 	int	13h
   238                              <1> 	;jc	L13
   239                              <1> 	; 14/07/2022
   240 000001FC 72D7                <1> 	jc	short L9_10
   241                              <1> 
   242                              <1> 	; 29/08/2020
   243                              <1> 	; 04/02/2016 (ebx -> bx)
   244                              <1> 	; 14/01/2015
   245 000001FE 28FF                <1> 	sub	bh, bh
   246 00000200 88D3                <1> 	mov	bl, dl
   247                              <1> 	;sub	bl, 80h
   248                              <1> 	; 29/08/2020
   249 00000202 81C3[FE64]          <1> 	add	bx, (hd0_type - 80h)
   250                              <1> 	;mov 	al, [bx]
   251 00000206 8A07                <1> 	mov	al, [bx]
   252 00000208 0C80                <1> 	or	al, 80h
   253 0000020A 8807                <1> 	mov 	[bx], al	
   254 0000020C 81EB[7C65]          <1> 	sub	bx, hd0_type - 2 ; 15/01/2015
   255                              <1> 	;add	bx, drv.status
   256                              <1> 	;mov	[bx], al
   257                              <1> 	; 29/08/2020
   258 00000210 8887[9E65]          <1> 	mov	[bx+drv.status], al
   259                              <1> 	; 04/02/2016 (eax -> ax)
   260                              <1> 	;mov	ax, [si+16]
   261                              <1> 	; 14/07/2020
   262                              <1> 	;mov	di, [si+18] 
   263                              <1> 	;;test	ax, [si+18]
   264                              <1> 	;test	ax, di ; 14/07/2020
   265                              <1> 	;jz	short L10_A0h ; (!) ; 17/07/2020
   266                              <1> 			; 'CHS only' disks on EDD system 
   267                              <1> 			;  are reported with ZERO disk size
   268                              <1> 			; (if so, we must not overwrite
   269                              <1> 			; calculated disk size in 'set_disk_parms')
   270                              <1> 	; 29/08/2020
   271 00000214 8B4410              <1> 	mov	ax, [si+16]
   272 00000217 8B7C12              <1> 	mov	di, [si+18]
   273 0000021A 09C0                <1> 	or	ax, ax
   274 0000021C 7504                <1> 	jnz	short L10_LBA
   275 0000021E 09FF                <1> 	or	di, di
   276 00000220 740B                <1> 	jz	short L10_A0h
   277                              <1> L10_LBA:
   278                              <1> 	;sub	bx, drv.status
   279 00000222 C1E302              <1> 	shl	bx, 2
   280                              <1> 	;add	bx, drv.size ; disk size (in sectors)
   281                              <1> 	;mov	[bx], ax
   282                              <1> 	; 29/08/2020
   283 00000225 8987[8265]          <1> 	mov	[bx+drv.size], ax
   284                              <1> 	;mov	ax, [si+18]
   285                              <1> 	;;mov	[bx], ax
   286                              <1> 	;mov	[bx+2], ax ; BugFix ; 15/07/2020
   287                              <1> 	; 14/07/2020
   288                              <1> 	;mov	[bx+2], di ; 15/07/2020
   289                              <1> 	; 29/08/2020
   290 00000229 89BF[8465]          <1> 	mov	[bx+drv.size+2], di
   291                              <1> L10_A0h: 
   292                              <1> 	; 17/07/2020
   293                              <1> 	; Note: Virtual CPU will jump here from above (!) test
   294                              <1> 	;	while running in QEMU
   295                              <1> 
   296                              <1> 	; Jump here to fix a ZERO (LBA) disk size problem 
   297                              <1> 	; for CHS disks (28/02/2015)
   298                              <1> 	
   299                              <1> 	; 30/12/2014
   300 0000022D BF0000              <1> 	mov	di, HD0_DPT
   301 00000230 88D0                <1> 	mov	al, dl
   302 00000232 83E003              <1> 	and 	ax, 3
   303 00000235 C0E005              <1> 	shl	al, 5 ; * 32
   304 00000238 01C7                <1> 	add 	di, ax
   305 0000023A B80090              <1> 	mov	ax, DPT_SEGM
   306 0000023D 8EC0                <1> 	mov	es, ax
   307                              <1> 	;
   308 0000023F 88E8                <1> 	mov	al, ch	; max. cylinder number (bits 0-7)
   309 00000241 88CC                <1> 	mov	ah, cl	
   310 00000243 C0EC06              <1> 	shr	ah, 6	; max. cylinder number (bits 8-9)
   311 00000246 40                  <1>  	inc	ax	; logical cylinders (limit 1024)
   312 00000247 AB                  <1> 	stosw		
   313 00000248 88F0                <1> 	mov	al, dh	; max. head number
   314                              <1> 	;
   315 0000024A 30F6                <1> 	xor	dh, dh  ; 29/08/2020 (dh = 0 is needed here)
   316                              <1> 	;
   317 0000024C FEC0                <1> 	inc	al
   318 0000024E AA                  <1> 	stosb		; logical heads (limits 256)
   319 0000024F B0A0                <1> 	mov	al, 0A0h ; Indicates translated table
   320 00000251 AA                  <1> 	stosb
   321 00000252 8A440C              <1> 	mov	al, [si+12]
   322 00000255 AA                  <1> 	stosb		 ; physical sectors per track
   323 00000256 31C0                <1>  	xor	ax, ax
   324                              <1> 	;dec	ax	 ; 02/01/2015 
   325 00000258 AB                  <1> 	stosw		 ; precompensation (obsolete)
   326                              <1> 	;xor	al, al	 ; 02/01/2015	
   327 00000259 AA                  <1> 	stosb		 ; reserved
   328 0000025A B008                <1> 	mov	al, 8	 ; drive control byte
   329                              <1> 		         ; (do not disable retries, 
   330                              <1> 			 ; more than 8 heads)
   331 0000025C AA                  <1> 	stosb
   332 0000025D 8B4404              <1> 	mov	ax, [si+4]
   333 00000260 AB                  <1> 	stosw		 ; physical number of cylinders	
   334                              <1> 	;push	ax	 ; 02/01/2015
   335 00000261 8A4408              <1> 	mov	al, [si+8]
   336 00000264 AA                  <1> 	stosb		 ; physical num. of heads (limit 16)
   337 00000265 29C0                <1> 	sub 	ax, ax
   338                              <1> 	;pop	ax	 ; 02/01/2015	
   339 00000267 AB                  <1> 	stosw		 ; landing zone (obsolete)
   340 00000268 88C8                <1> 	mov	al, cl	 ; logical sectors per track (limit 63)
   341 0000026A 243F                <1> 	and 	al, 3Fh	
   342 0000026C AA                  <1> 	stosb
   343                              <1> 	;sub	al, al	 ; checksum
   344                              <1> 	;stosb
   345                              <1> 	;
   346 0000026D 83C61A              <1> 	add	si, 26   ; (BIOS) DPTE address pointer
   347 00000270 AD                  <1> 	lodsw
   348 00000271 50                  <1> 	push	ax ; *	 ; (BIOS) DPTE offset
   349 00000272 AD                  <1> 	lodsw
   350 00000273 50                  <1> 	push	ax ; **	 ; (BIOS) DPTE segment
   351                              <1> 	;
   352                              <1> 	; checksum calculation
   353 00000274 89FE                <1> 	mov	si, di
   354 00000276 06                  <1> 	push	es
   355 00000277 1F                  <1> 	pop	ds
   356                              <1> 	;mov	cx, 16
   357 00000278 B90F00              <1> 	mov 	cx, 15
   358 0000027B 29CE                <1> 	sub	si, cx
   359 0000027D 30E4                <1> 	xor	ah, ah
   360                              <1> 	;del	cl
   361                              <1> L11:		
   362 0000027F AC                  <1> 	lodsb
   363 00000280 00C4                <1> 	add	ah, al
   364 00000282 E2FB                <1> 	loop	L11
   365                              <1> 	;
   366 00000284 88E0                <1> 	mov	al, ah
   367 00000286 F6D8                <1> 	neg	al	; -x+x = 0
   368 00000288 AA                  <1> 	stosb		; put checksum in byte 15 of the tbl
   369                              <1> 	;
   370 00000289 1F                  <1> 	pop	ds ; **	; (BIOS) DPTE segment
   371 0000028A 5E                  <1> 	pop	si ; *	; (BIOS) DPTE offset	
   372                              <1> 
   373                              <1> 	; 08/08/2022 (TRDOS 386 v2.0.5)
   374                              <1> 	; (Recent version of Retro UNIX 386 v1 'diskinit.s' file
   375                              <1> 	; -12/07/2022- does not contain following 2020 code) (*)
   376                              <1> 
   377                              <1> 	; 14/07/2020 (TRDOS 386 v2.0.2)
   378                              <1> 	; 0FFFFh:0FFFFh = invalid DPTE address
   379 0000028B 8B0C                <1> 	mov	cx, [si]
   380 0000028D 8B4402              <1> 	mov	ax, [si+2]
   381 00000290 21C1                <1> 	and	cx, ax
   382 00000292 41                  <1> 	inc	cx 
   383 00000293 7404                <1> 	jz	short L11c ; 0FFFFh:0FFFFh
   384 00000295 0B04                <1> 	or	ax, [si]
   385 00000297 752A                <1> 	jnz	short L11e ; <> 0
   386                              <1> L11c:
   387                              <1> 	; 17/07/2020
   388                              <1> 	; TRDOS 386 v2 DRVINIT assumptions:
   389                              <1> 	; (also by regarding QEMU, Bochs and VirtualBox settings)
   390                              <1> 	;	Hard disk 0 port address: 1F0h
   391                              <1> 	;	Hard disk 1 port address: 1F0h
   392                              <1> 	;	Hard disk 2 port address: 170h
   393                              <1> 	;	Hard disk 3 port address: 170h
   394                              <1> 
   395                              <1> 	; in QEMU, hda=hd0 (1F0h) and hdb=hd1 (1F0h) -IRQ14-
   396                              <1> 	;      and hdc=hd2 (170h) and hdd=hd3 (170h) -IRQ15-
   397                              <1> 
   398 00000299 B8F001              <1> 	mov	ax, 1F0h
   399                              <1> 
   400                              <1> 	; 15/07/2020
   401                              <1> 	; 14/07/2020
   402                              <1> 	; Invalid DPTE address...
   403                              <1> 	; Default DPTE parms must be set for DISK_IO_CONT
   404                              <1> 	; (diskio.s)
   405                              <1> 	; 17/07/2020
   406                              <1> 
   407                              <1> 	;mov	bl, dl
   408                              <1> 	;and	bl, 1
   409                              <1> 	;jz	short L11d
   410                              <1> 
   411 0000029C B3A0                <1> 	mov	bl, 0A0h
   412                              <1> 
   413 0000029E F6C201              <1> 	test	dl, 1
   414 000002A1 7403                <1> 	jz	short L11g  ; Master (as default, for 80h & 82h))
   415                              <1> 	;shl	bl, 4 ; bl = 16 (bit 4 = 1 -> slave)
   416 000002A3 80C310              <1> 	add	bl, 10h  ; Slave (as default, for 81h & 83h)
   417                              <1> L11g:
   418                              <1> 	; 17/07/2020
   419 000002A6 80FA82              <1> 	cmp	dl, 82h	; Hard disk 3 or 4 ?
   420 000002A9 7203                <1> 	jb	short L11d ; Primary ATA channel (hd0, hd1)
   421                              <1> 			   ; (port address = 1F0h)
   422                              <1> 	
   423                              <1> 	; Secondary ATA channel (hd2, hd3)
   424                              <1> 	; (port address = 170h)
   425                              <1> 
   426 000002AB 2D8000              <1> 	sub	ax, 1F0h-170h
   427                              <1> L11d:
   428                              <1> 	; 14/07/2020
   429 000002AE AB                  <1> 	stosw	; I/O PORT Base Address (1F0h, 170h)
   430 000002AF 050602              <1> 	add	ax, 206h
   431 000002B2 AB                  <1> 	stosw	; CONTROL PORT Address (3F6h, 376h)	
   432 000002B3 88D8                <1> 	mov	al, bl  ; Master/Slave bit (0 = Master)
   433                              <1> 	; 17/07/2020
   434                              <1> 	;or	al, 0A0h ; CHS (LBA enable bit = 0)
   435                              <1> 			 ; (Bits 5&7, reserved bits  =  1)
   436 000002B5 30E4                <1> 	xor	ah, ah
   437                              <1> 	;stosb	; Device/Head Register upper nibble
   438 000002B7 AB                  <1> 	stosw
   439 000002B8 30C0                <1> 	xor	al, al
   440 000002BA B90500              <1> 	mov	cx, 5
   441 000002BD F3AB                <1> 	rep	stosw ; clear remain part of the (fake) DPTE
   442 000002BF 0E                  <1> 	push	cs
   443 000002C0 1F                  <1> 	pop	ds
   444 000002C1 EB2E                <1> 	jmp	short L11f
   445                              <1> 
   446                              <1> 	; 08/08/2022 (TRDOS 386 v2.0.5)
   447                              <1> 	; (Recent version of Retro UNIX 386 v1 'diskinit.s' file
   448                              <1> 	; -12/07/2022- does not contain above 2020 code) (*)
   449                              <1> L11e:
   450                              <1> 	; 23/02/2015
   451 000002C3 57                  <1> 	push	di
   452                              <1> 	; ES:DI points to DPTE (FDPTE) location
   453                              <1> 	;;mov	cx, 8
   454                              <1> 	;mov	cl, 8
   455 000002C4 B90800              <1> 	mov	cx, 8 ; 14/07/2020
   456 000002C7 F3A5                <1> 	rep	movsw	
   457                              <1> 	;
   458                              <1> 	; 23/02/2015
   459                              <1> 	; (P)ATA drive and LBA validation
   460                              <1> 	; (invalidating SATA drives and setting
   461                              <1> 	; CHS type I/O for old type fixed disks)
   462 000002C9 5B                  <1> 	pop	bx
   463 000002CA 8CC8                <1> 	mov	ax, cs
   464 000002CC 8ED8                <1> 	mov	ds, ax
   465 000002CE 268B07              <1> 	mov	ax, [es:bx]
   466 000002D1 3DF001              <1> 	cmp	ax, 1F0h
   467 000002D4 7413                <1> 	je	short L11a
   468 000002D6 3D7001              <1> 	cmp	ax, 170h
   469 000002D9 740E                <1> 	je	short L11a
   470                              <1> 	; invalidation 
   471                              <1> 	; (because base port address is not 1F0h or 170h)
   472                              <1> 	;xor	bh, bh
   473                              <1> 	;mov	bl, dl
   474                              <1> 	; 29/08/2020
   475                              <1> 	;xor	dh, dh ; 0
   476 000002DB 89D3                <1> 	mov	bx, dx
   477                              <1> 	;sub	bl, 80h
   478                              <1> 	;mov	byte [bx+hd0_type], 0 ; not a valid disk drive !		
   479                              <1>         ;or	byte [bx+drv.status+2], 0F0h ; (failure sign)
   480                              <1> 	; 29/08/2020
   481 000002DD C687[FE64]00        <1> 	mov	byte [bx+hd0_type-80h], 0
   482 000002E2 808F[2065]F0        <1> 	or	byte [bx+drv.status-7Eh], 0F0h
   483 000002E7 EB0F                <1> 	jmp	short L11b
   484                              <1> L11a:	
   485                              <1> 	; LBA validation
   486 000002E9 268A4704            <1> 	mov	al, [es:bx+4] ; Head register upper nibble
   487 000002ED A840                <1> 	test	al, 40h ; LBA bit (bit 6)
   488 000002EF 7507                <1> 	jnz	short L11b ; LBA type I/O is OK! (E0h or F0h)
   489                              <1> L11f:
   490                              <1> 	; force CHS type I/O for this drive (A0h or B0h)
   491                              <1> 	;sub	bh, bh
   492                              <1> 	;mov	bl, dl
   493                              <1> 	; 29/08/2020
   494                              <1> 	;xor	dh, dh ; 0
   495 000002F1 89D3                <1> 	mov	bx, dx
   496                              <1> 	;sub	bl, 80h ; 26/02/2015
   497                              <1>         ;and	byte [bx+drv.status+2], 0FEh ; clear bit 0
   498                              <1> 				; bit 0 = LBA ready bit
   499                              <1> 	; 29/08/2020
   500 000002F3 80A7[2065]FE        <1> 	and	byte [bx+drv.status-7Eh], 0FEh
   501                              <1> 	; 'diskio' procedure will check this bit !
   502                              <1> L11b:
   503 000002F8 3A16[7A65]          <1> 	cmp	dl, [last_drv] ; 25/12/2014
   504 000002FC 7307                <1>         jnb     short L13
   505 000002FE E9D7FE              <1>         jmp     L10
   506                              <1> 
   507                              <1> L12:
   508                              <1> 	; Restore data registers
   509 00000301 8CC8                <1> 	mov	ax, cs
   510 00000303 8ED8                <1> 	mov	ds, ax	
   511                              <1> L13:
   512                              <1> 	; 13/12/2014
   513 00000305 0E                  <1> 	push	cs
   514 00000306 07                  <1> 	pop	es
   515                              <1> L14:
   516                              <1> 	; clear keyboard buffer
   517 00000307 B411                <1> 	mov 	ah, 11h
   518 00000309 CD16                <1> 	int 	16h
   519 0000030B 7440                <1> 	jz 	short L16 ; no keys in keyboard buffer
   520 0000030D B010                <1> 	mov	al, 10h
   521 0000030F CD16                <1> 	int 	16h
   522 00000311 EBF4                <1> 	jmp 	short L14
   523                              <1> 
   524                              <1> set_disk_parms:
   525                              <1> 	; 08/08/2022 - TRDOS 386 v2.0.5
   526                              <1> 	; 09/05/2022 - Retro UNIX 386 v1.2
   527                              <1> 	; 29/08/2020 - TRDOS 386 v2.0.2
   528                              <1> 	; 04/02/2016 (ebx -> bx)
   529                              <1> 	; 10/07/2015
   530                              <1> 	; 14/01/2015
   531                              <1> 	;push	bx
   532 00000313 28FF                <1> 	sub	bh, bh
   533 00000315 8A1E[7965]          <1> 	mov	bl, [drv]
   534 00000319 80FB80              <1> 	cmp	bl, 80h
   535 0000031C 7203                <1> 	jb	short sdp0
   536 0000031E 80EB7E              <1> 	sub	bl, 7Eh
   537                              <1> sdp0:	
   538                              <1> 	;add	bx, drv.status
   539                              <1>   	;mov	byte [bx], 80h ; 'Present' flag
   540                              <1> 	; 29/08/2020
   541 00000321 C687[9E65]80        <1> 	mov	byte [bx+drv.status], 80h
   542                              <1> 	;
   543 00000326 88E8                <1> 	mov	al, ch ; last cylinder (bits 0-7)
   544 00000328 88CC                <1> 	mov	ah, cl ; 
   545 0000032A C0EC06              <1> 	shr	ah, 6  ; last cylinder (bits 8-9)
   546                              <1> 	;sub	bx, drv.status
   547 0000032D D0E3                <1> 	shl	bl, 1
   548                              <1> 	;add	bx, drv.cylinders
   549 0000032F 40                  <1> 	inc	ax  ; convert max. cyl number to cyl count
   550                              <1> 	;mov	[bx], ax
   551                              <1> 	; 08/08/2022
   552                              <1> 	; 29/08/2020
   553                              <1> 	;mov	[bx+drv.cylinders], ax
   554                              <1> 	;
   555 00000330 50                  <1> 	push	ax ; ** cylinders
   556                              <1> 	;sub	bx, drv.cylinders
   557                              <1> 	;add	bx, drv.heads
   558 00000331 30E4                <1> 	xor	ah, ah
   559 00000333 88F0                <1> 	mov	al, dh ; heads
   560 00000335 40                  <1> 	inc	ax
   561                              <1> 	;mov	[bx], ax
   562                              <1> 	; 08/08/2022
   563                              <1> 	; 29/08/2020
   564                              <1> 	;mov	[bx+drv.heads], ax
   565                              <1> 	;sub	bx, drv.heads
   566                              <1>         ;add	bx, drv.spt
   567 00000336 30ED                <1> 	xor	ch, ch
   568 00000338 80E13F              <1> 	and	cl, 3Fh	; sectors (bits 0-6)
   569                              <1> 	;mov	[bx], cx
   570                              <1>         ; 08/08/2022
   571                              <1> 	; 29/08/2020
   572                              <1> 	;mov	[bx+drv.spt], cx
   573                              <1> 	;sub	bx, drv.spt
   574 0000033B D1E3                <1> 	shl	bx, 1
   575                              <1> 	;add	bx, drv.size ; disk size (in sectors)
   576                              <1> 	; LBA size = cylinders * heads * secpertrack
   577 0000033D F7E1                <1> 	mul	cx 
   578 0000033F 89C2                <1> 	mov	dx, ax	; heads*spt
   579 00000341 58                  <1> 	pop	ax ; ** cylinders
   580                              <1> 	; 09/05/2022 (fd0&fd1 drv.size = cyls*spt*heads)
   581                              <1> 	;dec	ax ; 1 cylinder reserved (!?) ; (*)
   582 00000342 F7E2                <1> 	mul	dx ; cylinders * (heads*spt)
   583                              <1> 	;mov	[bx], ax
   584                              <1> 	;mov	[bx+2], dx
   585                              <1> 	; 29/08/2020
   586 00000344 8987[8265]          <1> 	mov	[bx+drv.size], ax
   587 00000348 8997[8465]          <1> 	mov	[bx+drv.size+2], dx
   588                              <1> 	;
   589                              <1> 	;pop	bx
   590 0000034C C3                  <1> 	retn
   591                              <1> 
   592                              <1> L16:	; 28/05/2016
   418                                  
   419                                  	; 10/11/2014
   420 0000034D FA                           	cli	; Disable interrupts (clear interrupt flag)
   421                                  		; Reset Interrupt MASK Registers (Master&Slave)
   422                                  	;mov	al, 0FFh	; mask off all interrupts
   423                                  	;out	21h, al		; on master PIC (8259)
   424                                  	;jmp 	$+2  ; (delay)
   425                                  	;out	0A1h, al	; on slave PIC (8259)
   426                                  	;
   427                                  	; Disable NMI 
   428 0000034E B080                    	mov   	al, 80h 
   429 00000350 E670                    	out   	70h, al		; set bit 7 to 1 for disabling NMI
   430                                  	;23/02/2015
   431                                  	;nop			;
   432                                  	;in	al, 71h		; read in 71h just after writing out to 70h
   433                                  				; for preventing unknown state (!?)
   434                                  	;
   435                                   	; 20/08/2014
   436                                  	; Moving the kernel 64 KB back (to physical address 0)
   437                                  	; DS = CS = 1000h
   438                                  	; 05/11/2014
   439 00000352 31C0                    	xor	ax, ax
   440 00000354 8EC0                    	mov	es, ax ; ES = 0
   441                                  	;
   442                                  	; 04/07/2016 - TRDOS 386 (64K - 128K kernel)
   443 00000356 31F6                          	xor	si, si
   444 00000358 31FF                    	xor	di, di
   445 0000035A B90040                  	mov	cx, 16384
   446 0000035D F366A5                  	rep	movsd
   447                                  	;
   448 00000360 06                      	push	es ; 0
   449 00000361 68[6503]                	push	L17
   450 00000364 CB                      	retf
   451                                  L17:
   452 00000365 B90010                  	mov	cx, 1000h
   453 00000368 8EC1                    	mov	es, cx  ; 1000h 
   454 0000036A 01C9                    	add	cx, cx
   455 0000036C 8ED9                    	mov	ds, cx  ; 2000h
   456 0000036E 29F6                    	sub	si, si
   457 00000370 29FF                    	sub	di, di
   458 00000372 B90040                  	mov	cx, 16384
   459 00000375 F366A5                  	rep	movsd
   460                                  	
   461                                  	; Turn off the floppy drive motor
   462 00000378 BAF203                          mov     dx, 3F2h
   463 0000037B EE                              out     dx, al ; 0 ; 31/12/2013
   464                                  
   465                                  	; Enable access to memory above one megabyte
   466                                  L18:
   467 0000037C E464                    	in	al, 64h
   468 0000037E A802                    	test	al, 2
   469 00000380 75FA                            jnz     short L18
   470 00000382 B0D1                    	mov	al, 0D1h	; Write output port
   471 00000384 E664                    	out	64h, al
   472                                  L19:
   473 00000386 E464                    	in	al, 64h
   474 00000388 A802                    	test	al, 2
   475 0000038A 75FA                            jnz     short L19
   476 0000038C B0DF                    	mov	al, 0DFh	; Enable A20 line
   477 0000038E E660                    	out	60h, al
   478                                  ;L20:
   479                                  	;
   480                                  	; Load global descriptor table register
   481                                  
   482                                          ;mov     ax, cs
   483                                          ;mov     ds, ax
   484                                  
   485 00000390 2E0F0116[E864]                  lgdt    [cs:gdtd]
   486                                  
   487 00000396 0F20C0                          mov     eax, cr0
   488                                  	;or 	al, 1	; 24/07/2023
   489 00000399 40                      	inc     ax
   490 0000039A 0F22C0                  	mov     cr0, eax
   491                                  
   492                                  	; Jump to 32 bit code
   493                                  	
   494 0000039D 66                      	db 66h 			; Prefix for 32-bit
   495 0000039E EA                      	db 0EAh 		; Opcode for far jump
   496 0000039F [A5030000]              	dd StartPM 		; Offset to start, 32-bit
   497                                  				; (1000h:StartPM = StartPM + 10000h)
   498 000003A3 0800                    	dw KCODE		; This is the selector for CODE32_DESCRIPTOR,
   499                                  				; assuming that StartPM resides in code32
   500                                  
   501                                  ; 20/02/2017
   502                                  
   503                                  
   504                                  [BITS 32] 
   505                                  
   506                                  StartPM:
   507                                  	; Kernel Base Address = 0 ; 30/12/2013
   508 000003A5 66B81000                	mov ax, KDATA           ; Save data segment identifier
   509 000003A9 8ED8                            mov ds, ax              ; Move a valid data segment into DS register
   510 000003AB 8EC0                           	mov es, ax              ; Move data segment into ES register
   511 000003AD 8EE0                           	mov fs, ax              ; Move data segment into FS register
   512 000003AF 8EE8                          	mov gs, ax              ; Move data segment into GS register
   513 000003B1 8ED0                            mov ss, ax              ; Move data segment into SS register
   514 000003B3 BC00000900                      mov esp, 90000h         ; Move the stack pointer to 090000h
   515                                  
   516                                  clear_bss: ; Clear uninitialized data area
   517                                  	; 11/03/2015
   518 000003B8 31C0                    	xor	eax, eax ; 0
   519 000003BA B901670000              	mov	ecx, (bss_end - bss_start)/4
   520                                  	;shr	ecx, 2 ; bss section is already aligned for double words
   521 000003BF BF[5A740100]            	mov	edi, bss_start	
   522 000003C4 F3AB                    	rep	stosd  		
   523                                  
   524                                  memory_init:
   525                                  	; Initialize memory allocation table and page tables
   526                                  	; 27/11/2023 (TRDOS 386 v2.0.7)
   527                                  	; 24/07/2022 (TRDOS 386 v2.0.5)
   528                                  	; 18/04/2021 (TRDOS 386 v2.0.4)
   529                                  	; 16/11/2014
   530                                  	; 15/11/2014
   531                                  	; 07/11/2014
   532                                  	; 06/11/2014
   533                                  	; 05/11/2014
   534                                  	; 04/11/2014
   535                                  	; 31/10/2014 (Retro UNIX 386 v1 - Beginning) 
   536                                  	;
   537                                  ;	xor	eax, eax
   538                                  ;	xor 	ecx, ecx
   539 000003C6 B108                    	mov	cl, 8
   540 000003C8 BF00001000              	mov	edi, MEM_ALLOC_TBL	
   541 000003CD F3AB                    	rep	stosd		   ; clear Memory Allocation Table
   542                                  				   ; for the first 1 MB memory
   543                                  	;
   544 000003CF 668B0D[74650000]        	mov	cx, [mem_1m_1k]	   ; Number of contiguous KB between
   545                                  				   ; 1 and 16 MB, max. 3C00h = 15 MB.
   546                                  	;shr	cx, 2		   ; convert 1 KB count to 4 KB count
   547                                  	; 24/07/2022
   548 000003D6 C1E902                  	shr	ecx, 2
   549 000003D9 890D[50770100]          	mov	[free_pages], ecx
   550 000003DF 668B15[76650000]        	mov	dx, [mem_16m_64k]  ; Number of contiguous 64 KB blocks
   551                                  				   ; between 16 MB and 4 GB.	
   552 000003E6 6609D2                  	or	dx, dx
   553 000003E9 741A                    	jz	short mi_0
   554                                  
   555                                  	; 23/11/2023 - temporary
   556                                  	;and	dx, 3FFFh
   557                                  
   558 000003EB 668915[76650000]        	mov	[mem_16m_64k], dx
   559                                  
   560 000003F2 6689D0                  	mov	ax, dx
   561 000003F5 C1E004                  	shl	eax, 4		   ; 64 KB -> 4 KB (page count)
   562 000003F8 0105[50770100]          	add	[free_pages], eax
   563 000003FE 0500100000              	add	eax, 4096	   ; 16 MB = 4096 pages
   564 00000403 EB06                    	jmp	short mi_1
   565                                  mi_0:
   566                                  	;mov	ax, cx
   567                                  	; 24/07/2022
   568 00000405 89C8                    	mov	eax, ecx
   569 00000407 66050001                	add	ax, 256		   ; add 256 pages for the first 1 MB
   570                                  	;add	eax, 256			 
   571                                  mi_1:
   572 0000040B A3[4C770100]            	mov	[memory_size], eax ; Total available memory in pages
   573                                  				   ; 1 alloc. tbl. bit = 1 memory page
   574                                  				   ; 32 allocation bits = 32 mem. pages   
   575                                  	;
   576 00000410 05FF7F0000              	add	eax, 32767	   ; 32768 memory pages per 1 M.A.T. page 	
   577 00000415 C1E80F                  	shr	eax, 15		   ; ((32768 * x) + y) pages (y < 32768)
   578                                  				   ;  --> x + 1 M.A.T. pages, if y > 0
   579                                  				   ;  --> x M.A.T. pages, if y = 0
   580 00000418 66A3[60770100]          	mov	[mat_size], ax	   ; Memory Alloc. Table Size in pages		
   581 0000041E C1E00C                  	shl	eax, 12		   ; 1 M.A.T. page = 4096 bytes
   582                                  	;			   ; Max. 32 M.A.T. pages (4 GB memory)
   583 00000421 89C3                    	mov	ebx, eax	   ; M.A.T. size in bytes
   584                                  	; Set/Calculate Kernel's Page Directory Address
   585 00000423 81C300001000            	add	ebx, MEM_ALLOC_TBL
   586 00000429 891D[48770100]          	mov	[k_page_dir], ebx  ; Kernel's Page Directory address
   587                                  				   ; just after the last M.A.T. page
   588                                  	;
   589 0000042F 83E804                  	sub	eax, 4		   ; convert M.A.T. size to offset value
   590 00000432 A3[58770100]            	mov	[last_page], eax   ; last page offset in the M.A.T.
   591                                  	;			   ; (allocation status search must be 
   592                                  				   ; stopped after here)	
   593 00000437 31C0                    	xor	eax, eax
   594 00000439 48                      	dec	eax		   ; FFFFFFFFh (set all bits to 1)	
   595                                  	;push	cx
   596                                  	; 18/04/2021
   597 0000043A 51                      	push	ecx
   598                                  	; ecx = 3840 ; 27/11/2023
   599                                  	; (Note: ecx < 3840 if the total memory is less than 16 MB)
   600 0000043B C1E905                  	shr	ecx, 5		   ; convert 1 - 16 MB page count to 
   601                                  				   ; count of 32 allocation bits
   602                                  	; ecx = 120 ; 27/11/2023
   603 0000043E F3AB                    	rep	stosd
   604                                  	;pop	cx
   605                                  	; 18/04/2021
   606 00000440 59                      	pop	ecx
   607 00000441 40                      	inc	eax		   ; 0	
   608 00000442 80E11F                  	and	cl, 31		   ; remain bits
   609 00000445 7412                    	jz	short mi_4
   610 00000447 8907                    	mov	[edi], eax	   ; reset	
   611                                  mi_2:
   612 00000449 0FAB07                  	bts	[edi], eax	   ; 06/11/2014		
   613 0000044C FEC9                    	dec	cl
   614 0000044E 7404                    	jz	short mi_3
   615 00000450 FEC0                    	inc	al
   616 00000452 EBF5                    	jmp	short mi_2
   617                                  mi_3:
   618 00000454 28C0                    	sub	al, al	   	   ; 0
   619 00000456 83C704                  	add	edi, 4		   ; 15/11/2014
   620                                  mi_4:
   621 00000459 6609D2                  	or	dx, dx		  ; check 16 MB to 4 GB memory space	
   622 0000045C 7421                    	jz	short mi_6	  ; max. 16 MB memory, no more...
   623                                  	;	
   624 0000045E B900021000              	mov	ecx, MEM_ALLOC_TBL + 512 ; End of first 16 MB memory
   625                                  	;	
   626 00000463 29F9                    	sub	ecx, edi	  ; displacement (to end of 16 MB)
   627 00000465 7406                    	jz	short mi_5	  ; jump if EDI points to 
   628                                  				  ;         end of first 16 MB	
   629 00000467 D1E9                    	shr	ecx, 1		  ; convert to dword count
   630 00000469 D1E9                    	shr	ecx, 1		  ; (shift 2 bits right) 
   631 0000046B F3AB                    	rep 	stosd		  ; reset all bits for reserved pages
   632                                  				  ; (memory hole under 16 MB)
   633                                  mi_5:
   634 0000046D 6689D1                  	mov	cx, dx		  ; count of 64 KB memory blocks
   635 00000470 D1E9                    	shr	ecx, 1		  ; 1 alloc. dword per 128 KB memory
   636 00000472 9C                      	pushf			  ; 16/11/2014		
   637 00000473 48                      	dec	eax		  ; FFFFFFFFh (set all bits to 1)
   638 00000474 F3AB                    	rep	stosd
   639 00000476 40                      	inc	eax		  ; 0
   640 00000477 9D                      	popf			  ; 16/11/2014
   641 00000478 7305                    	jnc	short mi_6
   642 0000047A 6648                    	dec	ax		  ; eax = 0000FFFFh
   643 0000047C AB                      	stosd
   644 0000047D 6640                    	inc	ax		  ; 0		
   645                                  mi_6:
   646 0000047F 39DF                    	cmp	edi, ebx	  ; check if EDI points to 	
   647 00000481 730A                    	jnb	short mi_7	  ; end of memory allocation table
   648                                  	;			  ; (>= MEM_ALLOC_TBL + 4906) 
   649 00000483 89D9                    	mov	ecx, ebx	  ; end of memory allocation table
   650 00000485 29F9                    	sub	ecx, edi	  ; convert displacement/offset
   651 00000487 D1E9                    	shr	ecx, 1		  ; to dword count 	 		
   652 00000489 D1E9                    	shr	ecx, 1		  ; (shift 2 bits right) 
   653 0000048B F3AB                    	rep 	stosd		  ; reset all remain M.A.T. bits
   654                                  mi_7:
   655                                  	; Reset M.A.T. bits in M.A.T. (allocate M.A.T. pages)
   656 0000048D BA00001000              	mov	edx, MEM_ALLOC_TBL
   657                                  	;sub	ebx, edx	  ; Mem. Alloc. Tbl. size in bytes
   658                                  	;shr	ebx, 12		  ; Mem. Alloc. Tbl. size in pages	
   659 00000492 668B0D[60770100]        	mov	cx, [mat_size]	  ; Mem. Alloc. Tbl. size in pages
   660 00000499 89D7                    	mov	edi, edx
   661 0000049B C1EF0F                  	shr	edi, 15		  ; convert M.A.T. address to
   662                                  				  ; byte offset in M.A.T.
   663                                  				  ; (1 M.A.T. byte points to 
   664                                  				  ;	      32768 bytes)
   665                                  				  ; Note: MEM_ALLOC_TBL address 
   666                                  				  ; must be aligned on 128 KB 
   667                                  				  ; boundary!
   668 0000049E 01D7                    	add	edi, edx	  ; points to M.A.T.'s itself	
   669                                  	; eax = 0
   670 000004A0 290D[50770100]          	sub	[free_pages], ecx ; 07/11/2014
   671                                  mi_8:
   672 000004A6 0FB307                  	btr	[edi], eax	  ; clear bit 0 to bit x (1 to 31)
   673                                  	;dec	bl
   674 000004A9 FEC9                    	dec	cl
   675 000004AB 7404                    	jz	short mi_9
   676 000004AD FEC0                    	inc	al
   677 000004AF EBF5                    	jmp	short mi_8
   678                                  mi_9:
   679                                  	;
   680                                  	; Reset Kernel's Page Dir. and Page Table bits in M.A.T.
   681                                  	;		(allocate pages for system page tables)
   682                                  
   683                                  	; edx = MEM_ALLOC_TBL
   684 000004B1 8B0D[4C770100]          	mov	ecx, [memory_size] ; memory size in pages (PTEs)
   685 000004B7 81C1FF030000            	add	ecx, 1023	 ; round up (1024 PTEs per table)	 	
   686 000004BD C1E90A                  	shr	ecx, 10		 ; convert memory page count to 
   687                                  				 ; page table count (PDE count)
   688                                  	;
   689 000004C0 51                      	push	ecx		 ; (**) PDE count (<= 1024)
   690                                  	;
   691 000004C1 41                      	inc	ecx		 ; +1 for kernel page directory
   692                                  	;
   693 000004C2 290D[50770100]          	sub	[free_pages], ecx ; 07/11/2014
   694                                  	;
   695 000004C8 8B35[48770100]          	mov	esi, [k_page_dir] ; Kernel's Page Directory address
   696 000004CE C1EE0C                  	shr	esi, 12		 ; convert to page number
   697                                  mi_10:
   698 000004D1 89F0                    	mov	eax, esi	 ; allocation bit offset
   699 000004D3 89C3                    	mov	ebx, eax
   700 000004D5 C1EB03                  	shr	ebx, 3		 ; convert to alloc. byte offset
   701 000004D8 80E3FC                  	and	bl, 0FCh	 ; clear bit 0 and bit 1
   702                                  				 ;   to align on dword boundary
   703 000004DB 83E01F                  	and	eax, 31		 ; set allocation bit position 
   704                                  				 ;  (bit 0 to bit 31)
   705                                  	;
   706 000004DE 01D3                    	add	ebx, edx	 ; offset in M.A.T. + M.A.T. address
   707                                  	;
   708 000004E0 0FB303                  	btr 	[ebx], eax	 ; reset relevant bit (0 to 31)
   709                                  	;
   710 000004E3 46                      	inc	esi		 ; next page table
   711 000004E4 E2EB                    	loop	mi_10		 ; allocate next kernel page table
   712                                  				 ; (ecx = page table count + 1)
   713                                  	;
   714 000004E6 59                      	pop	ecx		 ; (**) PDE count (= pg. tbl. count)
   715                                  	;
   716                                  	; Initialize Kernel Page Directory and Kernel Page Tables
   717                                  	;
   718                                  	; Initialize Kernel's Page Directory
   719 000004E7 8B3D[48770100]          	mov	edi, [k_page_dir]
   720 000004ED 89F8                    	mov	eax, edi
   721 000004EF 0C03                    	or	al, PDE_A_PRESENT + PDE_A_WRITE
   722                                  				; supervisor + read&write + present
   723 000004F1 89CA                    	mov	edx, ecx 	; (**) PDE count (= pg. tbl. count)	
   724                                  mi_11:
   725 000004F3 0500100000              	add	eax, 4096	; Add page size (PGSZ)
   726                                  			        ; EAX points to next page table
   727 000004F8 AB                      	stosd
   728 000004F9 E2F8                    	loop	mi_11
   729 000004FB 29C0                    	sub	eax, eax	; Empty PDE
   730                                  	;mov	cx, 1024	; Entry count (PGSZ/4)
   731                                  	; 29/11/2023
   732 000004FD B504                    	mov	ch, 4 ; cx = 4*256 = 1024
   733 000004FF 29D1                    	sub	ecx, edx
   734 00000501 7402                    	jz	short mi_12
   735 00000503 F3AB                    	rep	stosd 		; clear remain (empty) PDEs
   736                                  	;
   737                                  	; Initialization of Kernel's Page Directory is OK, here.
   738                                  mi_12:
   739                                  	; Initialize Kernel's Page Tables
   740                                  	;
   741                                  	; (EDI points to address of page table 0)
   742                                  	; eax = 0
   743 00000505 8B0D[4C770100]          	mov	ecx, [memory_size] ; memory size in pages
   744 0000050B 89CA                    	mov	edx, ecx	; (***)
   745 0000050D B003                    	mov	al, PTE_A_PRESENT + PTE_A_WRITE
   746                                  			     ; supervisor + read&write + present 	
   747                                  mi_13:
   748 0000050F AB                      	stosd
   749 00000510 0500100000              	add	eax, 4096	
   750 00000515 E2F8                    	loop	mi_13	
   751                                  	;and	dx, 1023	; (***)
   752                                  	; 30/08/2023
   753 00000517 81E2FF030000            	and	edx, 1023
   754 0000051D 7408                    	jz	short mi_14
   755                                  	;mov	cx, 1024	
   756                                  	; 30/08/2023
   757 0000051F B504                    	mov	ch, 4 ; 4*256 = 1024
   758                                  	;sub	cx, dx		; from dx (<= 1023) to 1024
   759                                  	; 24/07/2022
   760 00000521 29D1                    	sub	ecx, edx
   761 00000523 31C0                    	xor	eax, eax
   762 00000525 F3AB                    	rep	stosd		; clear remain (empty) PTEs 
   763                                  				; of the last page table
   764                                  mi_14:
   765                                  	;  Initialization of Kernel's Page Tables is OK, here.
   766                                  	;
   767 00000527 89F8                    	mov	eax, edi	; end of the last page table page
   768                                  			        ; (beginging of user space pages)
   769                                  
   770 00000529 C1E80F                  	shr	eax, 15		; convert to M.A.T. byte offset
   771 0000052C 24FC                    	and	al, 0FCh	; clear bit 0 and bit 1 for
   772                                  				; aligning on dword boundary	
   773 0000052E A3[5C770100]            	mov	[first_page], eax
   774 00000533 A3[54770100]            	mov	[next_page], eax ; The first free page pointer
   775                                  				 ; for user programs
   776                                  				 ; (Offset in Mem. Alloc. Tbl.)	
   777                                  	;
   778                                  	; Linear/FLAT (1 to 1) memory paging for the kernel is OK, here.
   779                                  	;
   780                                  	
   781                                  	; Enable paging
   782                                  	;
   783 00000538 A1[48770100]                    mov     eax, [k_page_dir]
   784 0000053D 0F22D8                  	mov	cr3, eax
   785 00000540 0F20C0                  	mov	eax, cr0
   786 00000543 0D00000080              	or	eax, 80000000h	; set paging bit (bit 31)
   787 00000548 0F22C0                  	mov	cr0, eax
   788                                          ;jmp    KCODE:StartPMP
   789                                  
   790 0000054B EA                      	db 0EAh 		; Opcode for far jump
   791 0000054C [52050000]                      dd StartPMP		; 32 bit offset
   792 00000550 0800                    	dw KCODE		; kernel code segment descriptor
   793                                  
   794                                  StartPMP:
   795                                  	; 06/11//2014
   796                                  	; Clear video page 0
   797                                  	;
   798                                  	; Temporary Code
   799                                  	;
   800 00000552 B9E8030000              	mov	ecx, 80*25/2
   801 00000557 BF00800B00              	mov	edi, 0B8000h
   802                                  	; 30/01/2016
   803                                  	;xor	eax, eax	; black background, black fore color
   804 0000055C B800070007              	mov	eax, 07000700h  ; black background, light gray fore color
   805 00000561 F3AB                    	rep	stosd
   806                                  	
   807                                  	; 19/08/2014
   808                                  	; Kernel Base Address = 0
   809                                  	; It is mapped to (physically) 0 in the page table.
   810                                  	; So, here is exactly 'StartPMP' address.
   811                                  
   812                                   	; 29/01/2016 (TRDOS 386 = TRDOS v2.0)
   813 00000563 BE[8E3A0100]            	mov	esi, starting_msg
   814                                  	;; 14/08/2015 (kernel version message will appear
   815                                  	;;	       when protected mode and paging is enabled)
   816 00000568 BF00800B00              	mov	edi, 0B8000h ; 27/08/2014
   817                                  	
   818                                  	; 30/11/2020
   819                                  	; 14/11/2020 (TRDOS 386 v2.0.3)
   820                                  	;cmp	byte [vbe3], 3 ; 03h
   821                                  	;jne	short pkv_1
   822                                  	;;mov	ah, 0Bh ; Black background, light cyan forecolor
   823                                  	;; Light red TRDOS 386 version text shows VBE3 is ready !
   824                                  	;mov	ah, 0Ch ; Black background, light red forecolor
   825                                  	;jmp	short pkv_2
   826                                  ;pkv_1:
   827 0000056D B40A                    	mov	ah, 0Ah ; Black background, light green forecolor
   828                                  ;pkv_2:
   829                                  	; 20/08/2014
   830 0000056F E8E6030000              	call	printk
   831                                  
   832                                  	; 'UNIX v7/x86' source code by Robert Nordier (1999)
   833                                  	; // Set IRQ offsets
   834                                  	;
   835                                  	;  Linux (v0.12) source code by Linus Torvalds (1991)
   836                                  	;
   837                                  					;; ICW1
   838 00000574 B011                    	mov	al, 11h			; Initialization sequence
   839 00000576 E620                    	out	20h, al			; 	8259A-1
   840                                  	; jmp 	$+2
   841 00000578 E6A0                    	out	0A0h, al		; 	8259A-2
   842                                  					;; ICW2
   843 0000057A B020                    	mov	al, 20h			; Start of hardware ints (20h)
   844 0000057C E621                    	out	21h, al			;	for 8259A-1
   845                                  	; jmp 	$+2
   846 0000057E B028                    	mov	al, 28h			; Start of hardware ints (28h)
   847 00000580 E6A1                    	out	0A1h, al		; 	for 8259A-2
   848                                  					;
   849 00000582 B004                    	mov	al, 04h			;; ICW3
   850 00000584 E621                    	out	21h, al			; 	IRQ2 of 8259A-1 (master)
   851                                  	; jmp 	$+2
   852 00000586 B002                    	mov	al, 02h			; 	is 8259A-2 (slave)
   853 00000588 E6A1                    	out	0A1h, al		;
   854                                  					;; ICW4
   855 0000058A B001                    	mov	al, 01h	 		;
   856 0000058C E621                    	out	21h, al			; 	8086 mode, normal EOI	
   857                                  	; jmp 	$+2
   858 0000058E E6A1                    	out	0A1h, al		;	for both chips.
   859                                  
   860                                  	;mov	al, 0FFh	; mask off all interrupts for now
   861                                  	;out	21h, al
   862                                  	;; jmp 	$+2
   863                                  	;out	0A1h, al
   864                                  
   865                                  	; 02/04/2015
   866                                  	; 26/03/2015 System call (INT 30h) modification
   867                                  	;  DPL = 3 (Interrupt service routine can be called from user mode)			
   868                                  	;
   869                                  	;; Linux (v0.12) source code by Linus Torvalds (1991)
   870                                  	;  setup_idt:
   871                                  	;
   872                                          ;; 16/02/2015
   873                                  	;;mov     dword [DISKETTE_INT], fdc_int ; IRQ 6 handler
   874                                  	; 21/08/2014 (timer_int)
   875 00000590 BE[2C370100]            	mov	esi, ilist
   876 00000595 8D3D[60740100]          	lea	edi, [idt]
   877                                  	; 26/03/2015
   878 0000059B B930000000              	mov	ecx, 48		; 48 hardware interrupts (INT 0 to INT 2Fh)
   879                                  	; 02/04/2015
   880 000005A0 BB00000800              	mov	ebx, 80000h
   881                                  rp_sidt1:
   882 000005A5 AD                      	lodsd
   883 000005A6 89C2                    	mov	edx, eax
   884 000005A8 66BA008E                	mov	dx, 8E00h
   885 000005AC 6689C3                  	mov	bx, ax
   886 000005AF 89D8                    	mov	eax, ebx	; /* selector = 0x0008 = cs */
   887                                         			        ; /* interrupt gate - dpl=0, present */
   888 000005B1 AB                      	stosd	; selector & offset bits 0-15 	
   889 000005B2 89D0                    	mov	eax, edx
   890 000005B4 AB                      	stosd	; attributes & offset bits 16-23
   891 000005B5 E2EE                    	loop	rp_sidt1
   892                                  	; 15/04/2016
   893                                  	; TRDOS 386 (TRDOS v2.0) /// 32 sofware interrupts ///
   894                                  	;mov	cl, 16        ; 16 software interrupts (INT 30h to INT 3Fh)
   895 000005B7 B120                    	mov	cl, 32	      ; 32 software interrupts (INT 30h to INT 4Fh)	
   896                                  rp_sidt2:
   897 000005B9 AD                      	lodsd
   898 000005BA 21C0                    	and	eax, eax
   899 000005BC 7413                    	jz	short rp_sidt3
   900 000005BE 89C2                    	mov	edx, eax
   901 000005C0 66BA00EE                	mov	dx, 0EE00h	; P=1b/DPL=11b/01110b
   902 000005C4 6689C3                  	mov	bx, ax
   903 000005C7 89D8                    	mov	eax, ebx	; selector & offset bits 0-15 	
   904 000005C9 AB                      	stosd
   905 000005CA 89D0                    	mov	eax, edx
   906 000005CC AB                      	stosd
   907 000005CD E2EA                    	loop	rp_sidt2
   908 000005CF EB16                    	jmp	short sidt_OK
   909                                  rp_sidt3:
   910 000005D1 B8[8A0D0000]            	mov	eax, ignore_int
   911 000005D6 89C2                    	mov	edx, eax
   912 000005D8 66BA00EE                	mov	dx, 0EE00h	; P=1b/DPL=11b/01110b
   913 000005DC 6689C3                  	mov	bx, ax
   914 000005DF 89D8                    	mov	eax, ebx	; selector & offset bits 0-15 	
   915                                  rp_sidt4:
   916 000005E1 AB                      	stosd
   917 000005E2 92                      	xchg	eax, edx
   918 000005E3 AB                      	stosd
   919 000005E4 92                      	xchg	edx, eax
   920 000005E5 E2FA                    	loop	rp_sidt4
   921                                  sidt_OK: 
   922 000005E7 0F011D[EE640000]        	lidt 	[idtd]
   923                                  	;
   924                                  	; TSS descriptor setup ; 24/03/2015
   925 000005EE B8[E0760100]            	mov	eax, task_state_segment
   926 000005F3 66A3[9A640000]          	mov	[gdt_tss0], ax
   927 000005F9 C1C010                  	rol	eax, 16
   928 000005FC A2[9C640000]            	mov	[gdt_tss1], al
   929 00000601 8825[9F640000]          	mov	[gdt_tss2], ah
   930 00000607 66C705[46770100]68-     	mov	word [tss.IOPB], tss_end - task_state_segment
   930 0000060F 00                 
   931                                  		; 
   932                                  		; IO Map Base address (When this address points
   933                                  		; to end of the TSS, CPU does not use IO port 
   934                                  		; permission bit map for RING 3 IO permissions, 
   935                                  		; access to any IO ports in ring 3 will be forbidden.)
   936                                   		;
   937                                  	;mov	[tss.esp0], esp ; TSS offset 4
   938                                  	;mov	word [tss.ss0], KDATA ; TSS offset 8 (SS)
   939 00000610 66B82800                   	mov	ax, TSS  ; It is needed when an interrupt 
   940                                  			 ; occurs (or a system call -software INT- is requested)
   941                                  			 ; while cpu running in ring 3 (in user mode).				
   942                                  			 ; (Kernel stack pointer and segment will be loaded
   943                                  			 ; from offset 4 and 8 of the TSS, by the CPU.)	 
   944 00000614 0F00D8                  	ltr	ax  ; Load task register
   945                                  	;
   946                                  esp0_set0:
   947                                  
   948                                  ; 29/11/2023 - Erdogan Tan
   949                                  ; ------------------------
   950                                  ; If we read following -disabled- stack page setting code...
   951                                  ; When the memory size >= 3GB, one of page tables conflicts with the stack page
   952                                  ; at 4MB-4096 address. So, to leave stack pointer at 90000h is better/default.
   953                                  ; (Problem may not appears for <= 2.5GB main memory but following code is also
   954                                  ; defective because kernel stack page would be seen as unallocated in the M.A.T.
   955                                  ; without by adding a memory allocation code.)
   956                                  ;
   957                                  ; 1st 4MB layout: 1MB kernel -base- reserved + max. 128 KB M.A.T. (at 100000h)
   958                                  ;                 + Kernel's page directory (4KB) -just after the M.A.T.-
   959                                  ;		  + Kernel's page tables (main memory size / 1024)
   960                                  ; Note:
   961                                  ; 1 or 2 additional kernel page table(s) may be needed for Linear Frame Buffer
   962                                  ; .. but, it/they will not have to be contiguous with other kernel page tables.
   963                                  ; ------------------------ 	 
   964                                  
   965                                  ; 27/11/2023 - TRDOS 386 v2.0.7
   966                                  %if 0
   967                                  	; 30/07/2015
   968                                  	mov 	ecx, [memory_size] ; memory size in pages
   969                                  	shl 	ecx, 12 ; convert page count to byte count
   970                                  	cmp	ecx, CORE ; beginning of user's memory space (400000h)
   971                                  			  ; (kernel mode virtual address)
   972                                  	jna	short esp0_set1
   973                                  	;
   974                                  	; If available memory > CORE (end of the 1st 4 MB)
   975                                  	; set stack pointer to CORE
   976                                  	;(Because, PDE 0 is reserved for kernel space in user's page directory)
   977                                  	;(PDE 0 points to page table of the 1st 4 MB virtual address space)
   978                                  	mov	ecx, CORE
   979                                  esp0_set1:
   980                                  	mov	esp, ecx ; top of kernel stack (**tss.esp0**)
   981                                  
   982                                  %endif
   983                                  
   984                                  esp0_set_ok:
   985                                  	; 30/07/2015 (**tss.esp0**) 
   986 00000617 8925[E4760100]          	mov	[tss.esp0], esp	 ; 90000h ; 29/11/2023
   987 0000061D 66C705[E8760100]10-             mov     word [tss.ss0], KDATA
   987 00000625 00                 
   988                                  	; 14/08/2015
   989                                  	; 10/11/2014 (Retro UNIX 386 v1 - Erdogan Tan)
   990                                  	;
   991                                  	;cli	; Disable interrupts (for CPU)
   992                                  	;    (CPU will not handle hardware interrupts, except NMI!)
   993                                  	;
   994 00000626 30C0                    	xor	al, al		; Enable all hardware interrupts!
   995 00000628 E621                    	out	21h, al		; (IBM PC-AT compatibility)
   996 0000062A EB00                    	jmp 	$+2		; (All conventional PC-AT hardware
   997 0000062C E6A1                    	out	0A1h, al	;  interrupts will be in use.)	
   998                                  				; (Even if related hardware component
   999                                  				;  does not exist!)
  1000                                  	; Enable NMI 
  1001 0000062E B07F                    	mov	al, 7Fh		; Clear bit 7 to enable NMI (again)
  1002 00000630 E670                    	out  	70h, al
  1003                                  	; 23/02/2015
  1004 00000632 90                      	nop
  1005 00000633 E471                    	in	al, 71h		; read in 71h just after writing out to 70h
  1006                                  				; for preventing unknown state (!?)
  1007                                  	;
  1008                                  	; Only a NMI can occur here... (Before a 'STI' instruction)
  1009                                  	;
  1010                                  	; 02/09/2014
  1011                                  	;xor	bx, bx
  1012                                  	; 24/07/2022
  1013 00000635 31DB                    	xor	ebx, ebx
  1014 00000637 66BA0002                	mov	dx, 0200h	; Row 2, column 0  ; 07/03/2015
  1015 0000063B E8C91C0000              	call	_set_cpos	; 24/01/2016
  1016                                  
  1017                                  	; 14/11/2020 (TRDOS 386 v2.0.3)
  1018                                  	; Check VBE3 protected mode interface/feature(s)
  1019                                  
  1020                                  	;cmp	byte [vbe3], 3 ; 03h
  1021                                  	;jne	short display_mem_info
  1022                                  
  1023                                  	; 20/11/2020
  1024 00000640 803D[64090000]02        	cmp	byte [vbe3], 2 ; 02h
  1025 00000647 7707                    	ja	short vbe3_pmid_chk
  1026                                  	;;jb	short display_mem_info
  1027                                  	;jb	display_mem_info ; 02/12/2020
  1028 00000649 7220                    	jb	short jmp_display_mem_info ; 24/07/2022
  1029 0000064B E916020000              	jmp	check_boch_plex86_vbe
  1030                                  
  1031                                  vbe3_pmid_chk:	
  1032 00000650 B9EA7F0000              	mov	ecx, 32768 - (20+2) ; 32766 - PMInfoBlockSize
  1033 00000655 BE02000C00              	mov	esi, 0C0002h ; 1st word of the video bios rom is 0AA55h
  1034                                  	
  1035                                  chk_pmi_sign:
  1036                                  	;mov	eax, [esi] 
  1037                                  	;cmp	eax, 'PMID'
  1038                                  	; 30/11/2020
  1039                                  	;cmp	al, 'P'
  1040                                  	;jne	short chk_pmi_sign_next
  1041 0000065A 813E504D4944            	cmp	dword [esi], 'PMID'
  1042                                  	;je	short display_vbios_product_name
  1043 00000660 740E                    	je	short verify_pmib_chksum ; 15/11/2020
  1044                                  ;chk_pmi_sign_next:
  1045 00000662 46                      	inc	esi  ; inc si
  1046 00000663 E2F5                    	loop	chk_pmi_sign
  1047                                  
  1048                                  not_valid_pmib:
  1049 00000665 FE0D[64090000]          	dec	byte [vbe3] ; 2 = VBE2 compatible 
  1050                                  			    ; (vbe3 feature is defective in this vbios)
  1051                                  	;jmp	short display_mem_info
  1052                                  jmp_display_mem_info:	; 24/07/2022
  1053                                  	; 02/12/2020
  1054 0000066B E9B4010000              	jmp	display_mem_info
  1055                                  
  1056                                  verify_pmib_chksum:
  1057                                  	; 18/10/2023
  1058                                  	; (ATI RV370 video bios contains ZERO at Checksum offset.)
  1059 00000670 31C0                    	xor	eax, eax
  1060 00000672 384613                  	cmp	byte [esi+19], al ; 0 ; Checksum byte
  1061 00000675 7611                    	jna	short skip_verify_pmib_chksum ; may be ATI video bios
  1062                                  	;cmp	dword [esi+16], 0C000h
  1063                                  	;	; CodeSegSel = 0C000h, InProtectMode = 0, Checksum = 0
  1064                                  	;je	short skip_verify_pmib_chksum ; may be ATI video bios
  1065                                  	; 18/10/2023
  1066                                  	; 15/11/2020
  1067                                  	;xor	eax, eax
  1068                                  	;;mov	ecx, eax 
  1069                                  	;mov	cl, 20
  1070 00000677 66B91400                	mov	cx, 20 ; 30/11/2020
  1071 0000067B 56                      	push	esi
  1072                                  pmib_sum_bytes:
  1073 0000067C AC                      	lodsb
  1074 0000067D 00C4                    	add	ah, al
  1075 0000067F E2FB                    	loop	pmib_sum_bytes
  1076 00000681 5E                      	pop	esi
  1077 00000682 08E4                    	or	ah, ah
  1078 00000684 75DF                    	jnz	short not_valid_pmib ; AH must be 0
  1079                                  
  1080                                  	; 18/10/2023
  1081 00000686 30C0                    	xor	al, al  ; eax = 0
  1082                                  
  1083                                  	; 28/02/2021
  1084                                  	; Set default (initial) truecolor bpp value to 32
  1085                                  	; (for VBE3 video bios.. because vbe3 video bioses
  1086                                  	;  use 32bpp -for truecolor modes- instead of 24bpp)
  1087                                  	; (This setting may be changed via 'sysvideo' bx=0908h)
  1088                                  
  1089                                  skip_verify_pmib_chksum: ; 18/10/2023
  1090                                  		
  1091 00000688 C605[0B740100]20        	mov	byte [truecolor], 32 ; (RGB: 00RRGGBBh)
  1092                                  
  1093                                  display_vbios_product_name: ; 14/11/2020
  1094                                  
  1095                                  	; ESI points to 'PMID' (0C0000h + 'PMID' offset)
  1096                                  
  1097                                  	; 15/11/2020
  1098                                  	;mov	[pmid_addr], si	; PMInfoBlock offset
  1099                                  	;		; (in VGA bios, 0C0000h + offset)
  1100                                  	; 02/12/2020
  1101                                  	;push	esi ; * pmid_addr
  1102 0000068F 89F7                    	mov	edi, esi
  1103                                  
  1104                                  	;mov	esi, [VBE3INFOBLOCK+22] ; 097E00h + 16h
  1105                                  	;		; OemVendorNamePtr (seg16:off16)
  1106 00000691 8B35067E0900            	mov	esi, [VBE3INFOBLOCK+6] ; 097E00h + 06h
  1107                                  			; OemStringPtr (seg16:off16)
  1108                                  	; 18/10/2023
  1109                                  	;xor	al, al  ; eax = 0
  1110 00000697 6696                    	xchg	ax, si	; ax = offset, si = 0
  1111 00000699 C1EE0C                  	shr	esi, 12 ; (to convert segment to base addr)
  1112 0000069C 6601C6                  	add	si, ax  ; esi has an address < 1 MB limit
  1113                                  			; (OemVendorName is in VBE3INFOBLOCK)
  1114                                  			; Example: 
  1115                                  			; TRDOS 386 v2.0.3 VESA VBE3 protected mode
  1116                                  			; interface development reference is ...
  1117                                  			; NVIDIA GeForce FX5500 VGA BIOS -C000h:029Ch-
  1118                                  			; Version 4.34.20.54.00 -C000h:02EDh- 	  
  1119                                  			; ((OemString is 'NVIDIA'))
  1120                                  			; ((OemVendorName is 'NVIDIA Corporation'))
  1121                                  			; ((OemProductName is 'NV34 Board - p162-1nz))
  1122                                  
  1123                                  	;mov	ah, 0Eh ; Black background, yellow forecolor
  1124                                  	; 30/11/2020
  1125 0000069F B40C                    	mov	ah, 0Ch ; Black background, light red forecolor
  1126                                  
  1127 000006A1 E8713A0000              	call	print_kmsg
  1128                                  
  1129                                  	;mov	ah, 07h
  1130                                  
  1131 000006A6 BE[ED730100]            	mov	esi, vesa_vbe3_bios_msg
  1132                                  	;call	print_kmsg
  1133 000006AB E86D3A0000              	call	pkmsg_loop ; 30/11/2020
  1134                                  
  1135                                  	; 02/12/2020
  1136                                  	;pop	edi ; * pmid_addr
  1137                                  
  1138                                  	; 24/07/2022
  1139                                  	; 29/11/2020
  1140                                  vbe3pminit:
  1141                                  	; 30/11/2020
  1142                                  	;cmp	byte [vbe3], 3 ; is VESA VBE3 PMI ready ?
  1143                                  	;jne	short di4
  1144                                  
  1145                                  	; Allocate 64KB contiguous (kernel) memory block
  1146 000006B0 31C0                    	xor	eax, eax
  1147 000006B2 B900000100              	mov	ecx, 65536
  1148 000006B7 E84A550000              	call	allocate_memory_block
  1149                                  	;jc	short di4
  1150                                  	;jc	di0 ; 30/11/2020
  1151                                  	; 24/07/2022
  1152 000006BC 7305                    	jnc	short vbe3pminit0
  1153 000006BE E95A010000              	jmp	di0
  1154                                  
  1155                                  vbe3pminit0:
  1156                                  	; of course this block must be in the 1st 16MB
  1157                                  	; because vbe3 pmi segments will be 16 bit segments
  1158                                  	; (80286 type segment descriptors in GDT)
  1159                                  
  1160 000006C3 A3[D40F0300]            	mov	[vbe3bios_addr], eax
  1161                                  
  1162                                  	; set [pmid_addr] to the new location
  1163 000006C8 BE00000C00              	mov	esi, 0C0000h
  1164                                  
  1165                                  	; 30/11/2020
  1166 000006CD 29F7                    	sub	edi, esi ; izolate offset
  1167 000006CF 01C7                    	add	edi, eax ; new address
  1168 000006D1 893D[D80F0300]          	mov	[pmid_addr], edi ; new 'PMID' location	
  1169                                  
  1170                                  	; Move VIDEO BIOS from 0C0000h to EAX
  1171 000006D7 B900400000              	mov	ecx, 65536/4
  1172 000006DC 89C7                    	mov	edi, eax ; 30/11/2020
  1173 000006DE F3A5                    	rep	movsd
  1174                                  
  1175                                  	; 02/12/2020
  1176                                  	; 30/11/2020
  1177                                  	; set vbe3 segment selectors
  1178                                  
  1179                                  	; VBE3CS (VESA VBE3 video bios code segment)
  1180 000006E0 BF[A2640000]            	mov	edi, _vbe3_CS+2 ; base address bits 0..15
  1181 000006E5 66AB                    	stosw	; edi = _vbe3_CS+4
  1182 000006E7 C1C810                  	ror	eax, 16
  1183 000006EA 8807                    	mov	[edi], al ; base address, bits 16..23
  1184                                  
  1185                                  	; VBE3DS ('CodeSegSel' in PMInfoBlock)
  1186 000006EC BF[CC640000]            	mov	edi, _vbe3_DS+4 ; base addr bits 16..23
  1187 000006F1 8807                    	mov	[edi], al 
  1188 000006F3 C1C010                  	rol	eax, 16
  1189 000006F6 668947FE                	mov	[edi-2], ax ; base address, bits 0..15
  1190                                  
  1191                                  	; VBE3BDS (BIOSDataSel in PMInfoBlock)
  1192 000006FA BF[AA640000]            	mov	edi, _vbe3_BDS+2 ; base addr bits 0..15
  1193 000006FF B800700900              	mov	eax, VBE3BIOSDATABLOCK ; 1536 bytes
  1194 00000704 66AB                    	stosw	; edi = _vbe3_BDS+4
  1195 00000706 C1E810                  	shr	eax, 16
  1196 00000709 8807                    	mov	[edi], al ; base address, bits 16..23
  1197                                  
  1198                                  	; VBE3SS (1024 bytes)
  1199 0000070B BF[D2640000]            	mov	edi, _vbe3_SS+2 ; base addr bits 0..15
  1200 00000710 B800600900              	mov	eax, VBE3STACKADDR ; size = 1024 bytes
  1201 00000715 66AB                    	stosw	; edi = _vbe3_SS+4
  1202 00000717 C1E810                  	shr	eax, 16
  1203 0000071A 8807                    	mov	[edi], al ; base address, bits 16..23
  1204                                  
  1205                                  	; stack pointer (esp) will be set to 1020
  1206                                  	; (before VBE3 PMI call)
  1207                                  
  1208                                  	; VBE3ES (max: 2048 bytes)
  1209 0000071C BF[DA640000]            	mov	edi, _vbe3_ES+2 ; base addr bits 0..15
  1210 00000721 B800760900              	mov	eax, VBE3SAVERESTOREBLOCK
  1211 00000726 66AB                    	stosw	; edi = _vbe3_ES+4
  1212 00000728 C1E810                  	shr	eax, 16
  1213 0000072B 8807                    	mov	[edi], al ; base address, bits 16..23 	
  1214                                  
  1215                                  	;Note: low word of _VBE3_ES base address will be
  1216                                  	;      set -again- by VBE3 PMI caller routine 
  1217                                  
  1218                                  	; 09/12/2020
  1219                                  	;; set pmi32 (as VBE3 PMI is ready)
  1220                                  	;inc	byte [pmi32] ; = 1 
  1221                                  
  1222                                  	; KCODE16 (set PMI far return segment)
  1223 0000072D BF[E2640000]            	mov	edi, _16bit_CS+2 ; base addr bits 0..15
  1224 00000732 B8[BA070000]            	mov	eax, pminit_return_addr16
  1225 00000737 66AB                    	stosw	; edi = _16bit_CS+4
  1226 00000739 C1E810                  	shr	eax, 16
  1227 0000073C 8807                    	mov	[edi], al ; base address, bits 16..23 
  1228                                  
  1229                                  	; 30/11/2020
  1230                                  	; clear mem from VBE3 BIOS data area emu block
  1231                                  	; to end of vbe3 buffers
  1232                                  
  1233                                  	; 18/10/2023 - TRDOS v2.0.7
  1234                                  	; (VBE3BIOSDATABLOCK contains a copy of the 1st
  1235                                  	; 1536 bytes of the memory, IVT, ROMBIOS DATA etc.)
  1236                                  	; ((it must not be cleared here))
  1237                                  %if 0	
  1238                                  	; 01/12/2020
  1239                                  	mov	edi, VBE3BIOSDATABLOCK ; 97000h
  1240                                  	;mov	cx, (VBE3INFOBLOCK-VBE3BIOSDATABLOCK)/4
  1241                                  	;	; ecx = 3584/4 double words
  1242                                  	; 21/12/2020
  1243                                  	mov	cx, (VBE3MODEINFOBLOCK-VBE3BIOSDATABLOCK)/4
  1244                                  		; ecx = 3072/4 double words
  1245                                  	;xor	eax, eax
  1246                                  	xor	al, al
  1247                                  	rep	stosd
  1248                                  %endif
  1249                                  	; 18/10/2023 - TRDOS v2.0.7
  1250                                  	; (VBE3BIOSDATABLOCK contains a copy of the 1st
  1251                                  	; 1536 bytes of the memory, IVT, ROMBIOS DATA etc.)
  1252                                  	; ((it must not be cleared here))
  1253 0000073E BF00760900              	mov	edi, VBE3SAVERESTOREBLOCK ; 97600h
  1254 00000743 66B98001                	mov	cx, (VBE3MODEINFOBLOCK-VBE3SAVERESTOREBLOCK)/4
  1255                                  		 ; ecx = 1536/4 = 384 double words
  1256                                  	;xor	eax, eax
  1257 00000747 30C0                    	xor	al, al
  1258 00000749 F3AB                    	rep	stosd	
  1259                                  
  1260                                  	; Filling PMInfoBlock selector fields
  1261 0000074B 8B3D[D80F0300]          	mov	edi, [pmid_addr]
  1262 00000751 66C747083800            	mov	word [edi+PMInfo.BIOSDataSel], VBE3BDS
  1263 00000757 66C7470A4000            	mov	word [edi+PMInfo.A0000Sel], VBE3A000
  1264 0000075D 66C7470C4800            	mov	word [edi+PMInfo.B0000Sel], VBE3B000
  1265 00000763 66C7470E5000            	mov	word [edi+PMInfo.B8000Sel], VBE3B800	
  1266 00000769 66C747105800            	mov	word [edi+PMInfo.CodeSegSel], VBE3DS
  1267 0000076F C6471201                	mov	byte [edi+PMInfo.InProtectMode], 1
  1268                                  
  1269                                  	; Calculate and write checksum byte
  1270 00000773 89FE                    	mov	esi, edi
  1271 00000775 B113                    	mov	cl, PMInfo.size - 1
  1272                                  	;xor	ah, ah
  1273                                  pmid_chksum:
  1274 00000777 AC                      	lodsb	
  1275 00000778 00C4                    	add	ah, al
  1276 0000077A E2FB                    	loop	pmid_chksum
  1277 0000077C F6DC                    	neg	ah ; 1 -> 255, 255 -> 1
  1278 0000077E 8826                    	mov	[esi], ah  ; checksum
  1279                                  
  1280                                  	; far call PM initialization
  1281                                  	; (VBE3 video bios will return via 'retf')
  1282                                  
  1283 00000780 668B4706                	mov	ax, [edi+PMInfo.PMInitialize]
  1284                                  	; 30/11/2020
  1285 00000784 C1E010                  	shl	eax, 16 ; save entry address in hw
  1286                                  	; ax = 0 
  1287                                  
  1288                                  	; 02/12/2020
  1289 00000787 68[DE070000]            	push	pminit_ok ; normal, near return address
  1290                                  
  1291                                  	; 30/11/2020
  1292                                  _VBE3PMI_fcall:
  1293                                  	; ax = function, hw of eax = entry address
  1294 0000078C 9C                      	pushf	; save 32 bit flags
  1295 0000078D 56                      	push	esi ; *
  1296 0000078E 55                      	push	ebp ; **
  1297                                  
  1298 0000078F 89E5                    	mov	ebp, esp ; save 32 bit stack pointer
  1299                                  	
  1300 00000791 89C6                    	mov	esi, eax
  1301                                  
  1302 00000793 FA                      	cli
  1303                                  
  1304                                  	; Disable interrupts (clear interrupt flag)
  1305                                  	; Reset Interrupt MASK Registers (Master&Slave)
  1306 00000794 B0FF                    	mov	al, 0FFh	; mask off all interrupts
  1307 00000796 E621                    	out	21h, al		; on master PIC (8259)
  1308 00000798 EB00                    	jmp 	$+2  ; (delay)
  1309 0000079A E6A1                    	out	0A1h, al	; on slave PIC (8259)
  1310                                  
  1311                                  	; 02/12/2020
  1312 0000079C 66B86000                	mov	ax, VBE3SS
  1313 000007A0 8ED0                    	mov	ss, ax
  1314                                  	
  1315 000007A2 BCFC030000              	mov	esp, 1020 ; 30/11/2020
  1316                                  
  1317                                  	; 01/12/2020
  1318                                  	;lss	esp, [stack16]
  1319                                  
  1320 000007A7 C1E810                  	shr	eax, 16	; now, entry address is in lw
  1321                                  
  1322                                  	; 30/11/2020 - 16 bit pm selector test (OK)
  1323                                  	; (32 bit stack push/pop & retf with 32 bit code segment)
  1324                                  	; (16 bit stack push/pop with 16 bit code segment)
  1325                                  	
  1326                                  	; return
  1327                                  	;push	KCODE16
  1328                                  	;push	0 ; 30/11/2020 (pminit_return_addr16)
  1329                                  
  1330                                  	; 30/11/2020 (16 bit stack during retf from video bios)
  1331 000007AA C7042400007000          	mov	dword [esp], KCODE16 << 16
  1332                                  				; ip = 0, cs = KCODE16 
  1333                                  	; 01/12/2020
  1334                                  	;mov	dword [VBE3STACKADDR+1020], KCODE16*65536
  1335                                  
  1336                                  	;mov	[jumpfar16], eax
  1337                                  
  1338                                  	; 02/12/2020
  1339                                  	; 30/11/2020 (32 bit stack during retf from kernel)
  1340                                  	; far jump/call via retf
  1341 000007B1 6A30                    	push	VBE3CS ; VBE3 video bios's code segment
  1342 000007B3 50                      	push	eax ; PMInitialize or EntryPoint
  1343                                  
  1344                                  	;mov	ax, si ; restore function
  1345                                  	; 24/07/2022
  1346 000007B4 89F0                    	mov	eax, esi
  1347                                  
  1348                                  	; 02/12/2020
  1349 000007B6 31F6                    	xor	esi, esi ; (not necessary, it is not used)
  1350                                  	
  1351 000007B8 CB                      	retf 	; far return (to 16 bit code segment)
  1352                                  
  1353                                  	; 01/12/2020
  1354                                  	;db	0EAh  ; far jump to 16 bit code segment
  1355                                  ;jumpfar16:
  1356                                  	;dd	0		
  1357                                  	;dw	VBE3CS
  1358                                  
  1359                                  ;stack16:
  1360                                  	;dd	1020
  1361                                  	;dw	VBE3SS
  1362                                  
  1363 000007B9 90                      	align 2	
  1364                                  
  1365                                  pminit_return_addr16:
  1366                                  	; 02/12/2020
  1367                                  	; 30/11/2020
  1368                                  	;;db	66h 		     ; Prefix for 32-bit
  1369                                  	;db	0EAh 		     ; Opcode for far jump
  1370                                  	;dd	pminit_return_addr32 ; 32 bit Offset
  1371                                  	;dw	KCODE		     ; 32 bit code segment
  1372                                  	; 01/12/2020
  1373 000007BA EA[C1070000]0800        	jmp	KCODE:pminit_return_addr32
  1374                                  
  1375                                  pminit_return_addr32:
  1376                                  	; restore 32 bit kernel selectors and 32 bit stack addr
  1377 000007C1 BE10000000              	mov	esi, KDATA
  1378 000007C6 8EDE                    	mov	ds, si
  1379 000007C8 8EC6                    	mov	es, si
  1380 000007CA 8ED6                    	mov	ss, si
  1381 000007CC 89EC                    	mov	esp, ebp  ; top of stack = iretd return addr
  1382                                  
  1383 000007CE 5D                      	pop	ebp ; **
  1384 000007CF 5E                      	pop	esi ; *
  1385 000007D0 9D                      	popf	; restore 32 bit flags
  1386                                  
  1387                                  	; enable interrupts
  1388                                  
  1389 000007D1 FA                      	cli
  1390                                  
  1391                                  	; 21/12/2020
  1392 000007D2 50                      	push	eax
  1393                                  
  1394 000007D3 30C0                    	xor	al, al	   ; Enable all hardware interrupts!
  1395 000007D5 E621                    	out	21h, al	   ; (IBM PC-AT compatibility)
  1396 000007D7 EB00                    	jmp 	$+2	   ; (All conventional PC-AT hardware
  1397 000007D9 E6A1                    	out	0A1h, al   ;  interrupts will be in use.)	
  1398                                  			   ; (Even if related hardware component
  1399                                  			   ;  does not exist!)
  1400 000007DB 58                      	pop	eax
  1401                                  	
  1402 000007DC FB                      	sti
  1403                                  
  1404                                  	; top of stack = return address 
  1405                                  	; ('pminit_ok' for PMinit)
  1406                                  
  1407 000007DD C3                      	retn
  1408                                  
  1409                                  pminit_ok:
  1410                                  	; 03/12/2020
  1411                                  	; (set [pmid_addr] to PMI entry point for next calls)
  1412 000007DE 8305[D80F0300]04        	add	dword [pmid_addr], PMInfo.EntryPoint ; + 4
  1413                                  
  1414                                  	; 17/01/2021
  1415                                  	; copy EDID data from temporary location to final address
  1416 000007E5 803D[AF410000]4F        	cmp	byte [edid], 4Fh
  1417 000007EC 7510                    	jne	short vbe3h_chcl
  1418                                  	;mov	ecx, 32 ; 128 bytes, 32 dwords
  1419                                  	; 24/07/2022
  1420 000007EE 31C9                    	xor	ecx, ecx
  1421 000007F0 B120                    	mov	cl, 32
  1422 000007F2 BE007D0900              	mov	esi, VBE3EDIDINFOBLOCK ; 97D00h
  1423 000007F7 BF[500F0300]            	mov	edi, edid_info
  1424 000007FC F3A5                    	rep	movsd
  1425                                  	; 17/01/2021
  1426                                  vbe3h_chcl:
  1427                                  	; 16/01/2021
  1428                                  	;; 06/12/2020
  1429                                  	;; Save video mode 03h regs/dac/bios state
  1430                                  	;
  1431                                  	;mov	ax, 4F04h ; VESA VBE Function 04h
  1432                                  	;		  ; Save/Restore State
  1433                                  	;sub	dl, dl	; 0 = return buffer size
  1434                                  	;mov	cx, 0Fh  ; ctrl/bios/dac/regs
  1435                                  	;
  1436                                  	;call	int10h_32bit_pmi
  1437                                   	;; bx = number of 64-byte blocks to hold the state buff
  1438                                  	;	
  1439                                  	;;mov	[vbe3stbufsize], bx
  1440                                  	;; 16/01/2021
  1441                                  	;or	word [vbe3stbsflags], 32768  ; set bit 15
  1442                                  	;mov	ax, bx
  1443                                  	;shl	ax, 6  ; * 64
  1444                                  	;mov	[vbestatebufsize+30], ax
  1445                                  	;
  1446                                  	;; 06/12/2020	
  1447                                  	;; check 'vbe3stbufsize' (it must be <= 32)
  1448                                  	;
  1449                                  	;cmp	bx, 32
  1450                                  	;ja	short display_mem_info ; light red forecolor
  1451                                  	;
  1452                                  	;; 16/01/2021
  1453                                  	;or	byte [vbe3stbsflags], 1 ; set bit 0
  1454                                  
  1455                                  	; 30/11/2020
  1456                                  	; Change VESA VBE3 BIOS text color in order to give
  1457                                  	; "VBE3 PMI initialization has been successed" meaning 	
  1458                                  
  1459 000007FE BE40810B00              	mov	esi, 0B8000h + 160*2 ; row 2
  1460 00000803 89F7                    	mov	edi, esi
  1461                                  vbe3h_chcl_next:
  1462 00000805 66AD                    	lodsw
  1463 00000807 80FC0C                  	cmp	ah, 0Ch	; light red forecolor
  1464 0000080A 7518                    	jne	short display_mem_info
  1465 0000080C B40E                    	mov	ah, 0Eh ; yellow forecolor
  1466 0000080E 66AB                    	stosw
  1467 00000810 EBF3                    	jmp	short vbe3h_chcl_next
  1468                                  
  1469                                  di5:
  1470                                  	; 18/10/2023 - TRDOS 386 v2.0.7
  1471                                  	; ATI RV370 Video BIOS (VESA VBE2)
  1472                                  	; has PMI. (as described in VESA VBE3 specification)
  1473                                  	;
  1474 00000812 FE05[64090000]          	inc	byte [vbe3]  ; [vbe3] = 2 -> 3
  1475                                  			; will be decreased to 2 again if 'PMID'
  1476                                  			; signature will not be found. 	
  1477 00000818 E933FEFFFF              	jmp	vbe3_pmid_chk ; check for ATI Video BIOS
  1478                                  
  1479                                  di0:
  1480                                  	; 30/11/2020
  1481                                  	; Memory allocation error !
  1482 0000081D C605[64090000]00        	mov	byte [vbe3], 0 ; disable VBE3
  1483                                  
  1484                                  display_mem_info:
  1485                                  	; 19/12/2020
  1486                                  	; temporary
  1487                                  	; 24/11/2023
  1488 00000824 803D[64090000]02        	cmp	byte [vbe3], 2
  1489 0000082B 7205                    	jb	short dmi
  1490 0000082D E801390000              	call	default_lfb_info
  1491                                  dmi:
  1492                                  	; 06/11/2014
  1493 00000832 E887380000              	call	memory_info
  1494                                  	; 14/08/2015
  1495                                  	;call getch ; 28/02/2015
  1496                                  drv_init:
  1497 00000837 FB                      	sti	; Enable Interrupts 
  1498                                  	; 06/02/2015
  1499 00000838 8B15[7E650000]          	mov	edx, [hd0_type] ; hd0, hd1, hd2, hd3
  1500 0000083E 668B1D[7C650000]        	mov	bx, [fd0_type] ; fd0, fd1
  1501                                  	; 22/02/2015
  1502 00000845 6621DB                  	and	bx, bx
  1503 00000848 756C                    	jnz	short di1
  1504                                  	;
  1505 0000084A 09D2                    	or 	edx, edx
  1506 0000084C 757A                    	jnz	short di2
  1507                                  	;
  1508                                  setup_error:
  1509 0000084E BE[323A0100]            	mov 	esi, setup_error_msg
  1510                                  psem:	
  1511 00000853 AC                      	lodsb
  1512 00000854 08C0                    	or	al, al
  1513                                  	;jz	short haltx ; 22/02/2015
  1514 00000856 747C                    	jz	short di3
  1515 00000858 56                      	push	esi
  1516                                  	; 13/05/2016
  1517 00000859 BB07000000              	mov	ebx, 7	; Black background, 
  1518                                  			; light gray forecolor
  1519                                  			; Video page 0 (BH=0)
  1520 0000085E E80E1A0000              	call	_write_tty
  1521 00000863 5E                      	pop	esi
  1522 00000864 EBED                    	jmp	short psem
  1523                                  
  1524                                  check_boch_plex86_vbe:
  1525                                  	; 20/10/2023
  1526                                  	; 18/10/2023
  1527                                  	; 20/11/2020
  1528                                  	; check Bochs/Plex86 VGABios VBE extension
  1529                                  	; (check if TRDOS 386 v2 is running on emulators)
  1530                                  	; BOCHS/QEMU/VIRTUALBOX
  1531                                  	;
  1532                                  	; ref: vbe_display_api.txt
  1533                                  
  1534                                  	; bochs/plex86 VGAbios VBE source code
  1535                                  	;  by Jeroen Janssen (2002)
  1536                                  	;  and Volker Ruppert (2003-2020)
  1537                                  
  1538                                  	; 20/10/2023
  1539                                  	; (ATI RV370 video bios has PMI support but
  1540                                  	; it is a VESA VBE2 bios. So, even if [vbe3] is set
  1541                                  	; to 3 for PMI functionality, it is better to display
  1542                                  	; VESA VBE number as it is declared by the video bios.)
  1543                                  
  1544 00000866 C605[F6730100]32        	mov	byte [vbe_vnumber], "2" ; 20/10/2023
  1545                                  
  1546 0000086D 29C0                    	sub	eax, eax ; 0
  1547 0000086F 66BACE01                	mov	dx, 1CEh ; VBE_DISPI_IOPORT_INDEX
  1548 00000873 66EF                    	out	dx, ax ; VBE_DISPI_INDEX_ID register
  1549                                  	;mov	ax, 0B0C0h ; VBE_DISPI_ID0
  1550                                  	;mov	dx, 1CFh ; VBE_DISPI_IOPORT_DATA
  1551 00000875 6642                    	inc	dx
  1552                                  	;out	dx, ax
  1553                                  	;nop
  1554 00000877 66ED                    	in	ax, dx
  1555 00000879 80FCB0                  	cmp	ah, 0B0h
  1556                                  	;jne	short not_boch_qemu_vbe
  1557                                  	; 18/10/2023
  1558                                  	;jne	short display_mem_info
  1559 0000087C 7594                    	jne	short di5  ; ATI VESA VBE2 bios or another
  1560                                  
  1561 0000087E 3CC5                    	cmp	al, 0C5h ; it must be 0B0C4h or 0B0C5h ..
  1562                                  	;ja	short not_boch_qemu_vbe
  1563 00000880 77A2                    	ja	short display_mem_info
  1564 00000882 3CC0                    	cmp	al, 0C0h ; 0B0C0h to 0B0C5h .. ; Qemu
  1565                                  	;cmp	al, 0C4h ; 0BC04h or 0B0C5h is OK ; Bochs
  1566                                  	;jb	short not_boch_qemu_vbe
  1567 00000884 729E                    	jb	short display_mem_info
  1568                                  
  1569                                  	; save VESA VBE2 bios (bochs/qemu) signature
  1570                                  	; for enabling VBE2 functions in TRDOS 386 v2 kernel
  1571 00000886 A2[65090000]            	mov	[vbe2bios], al ; 0C4h or 0C5h (for BOCHS) 
  1572                                  			       ; (0C0h-0C5h for QEMU)
  1573                                  	; 20/10/2023
  1574                                  	;mov	byte [vbe_vnumber], "2"
  1575                                  
  1576                                  	; 26/11/2020
  1577                                  	; "BOCHS/QEMU/VIRTUALBOX VBE2 Video BIOS ..".
  1578 0000088B BE[D8730100]            	mov	esi, vbe2_bochs_vbios ; BOCH/QEMU vbios msg
  1579 00000890 B40E                    	mov	ah, 0Eh  ; Yellow font
  1580 00000892 E880380000              	call	print_kmsg
  1581                                  	
  1582                                  	; this is not necessary ! (20/11/2020)
  1583 00000897 803D[65090000]C4        	cmp	byte [vbe2bios], 0C4h 
  1584 0000089E 7284                    	jb	display_mem_info	; (QEMU) 
  1585                                  
  1586                                  	; Display kernel version message if 0E9h hack port
  1587                                  	; is enabled (bochs emulator feature)
  1588 000008A0 66BAE900                	mov	dx, 0E9h ; hack port for BOCHS
  1589 000008A4 BE[31740100]            	mov	esi, kernel_version_msg
  1590                                  kvmsg_next_char:
  1591 000008A9 AC                      	lodsb	
  1592 000008AA 08C0                    	or	al, al
  1593 000008AC 7505                    	jnz	short put_kvmsg_in_hack_port
  1594                                  not_boch_qemu_vbe:
  1595 000008AE E971FFFFFF               	jmp	display_mem_info
  1596                                  put_kvmsg_in_hack_port:	
  1597 000008B3 EE                      	out	dx, al
  1598 000008B4 EBF3                    	jmp	short kvmsg_next_char
  1599                                  
  1600                                  di1:
  1601                                  	; supress 'jmp short T6'
  1602                                  	;  (activate fdc motor control code)
  1603 000008B6 66C705[C6090000]90-     	mov	word [T5], 9090h ; nop
  1603 000008BE 90                 
  1604                                  	;
  1605                                  	;mov	ax, int_0Eh	; IRQ 6 handler
  1606                                  	;mov	di, 0Eh*4	; IRQ 6 vector
  1607                                  	;stosw
  1608                                  	;mov 	ax, cs
  1609                                  	;stosw
  1610                                  	;; 16/02/2015
  1611                                          ;;mov     dword [DISKETTE_INT], fdc_int ; IRQ 6 handler
  1612                                  	;
  1613 000008BF E87C450000              	CALL	DSKETTE_SETUP	; Initialize Floppy Disks
  1614                                  	;
  1615 000008C4 09D2                    	or	edx, edx
  1616 000008C6 740C                            jz      short di3
  1617                                  di2:
  1618 000008C8 E8A9450000              	call   	DISK_SETUP	; Initialize Fixed Disks
  1619                                          ;jc	setup_error
  1620                                  	; 24/07/2022
  1621 000008CD 7305                    	jnc	short di3
  1622 000008CF E97AFFFFFF              	jmp	setup_error
  1623                                  di3:
  1624 000008D4 E8B9370000              	call	setup_rtc_int	; 22/05/2015 (dsectrpm.s)
  1625                                  	;
  1626 000008D9 E8EA2F0100              	call	display_disks ; 07/03/2015  (Temporary)
  1627                                  ;haltx:
  1628                                  	; 14/08/2015
  1629                                  	;call	getch ; 22/02/2015
  1630                                  	;sti	; Enable interrupts (for CPU)
  1631                                  ;	; 29/01/2016
  1632                                  ;	sub	ah, ah ;  read time count
  1633                                  ;	call	int1Ah
  1634                                  ;	mov	edx, ecx ; 18.2 * seconds
  1635                                  ;md_info_msg_wait1:
  1636                                  ;	; 29/01/2016
  1637                                  ;	mov	ah, 1
  1638                                  ;	call	int16h
  1639                                  ;	jz	short md_info_msg_wait2
  1640                                  ;	xor	ah, ah ; 0
  1641                                  ;       call    int16h
  1642                                  ;	jmp 	short md_info_msg_ok
  1643                                  ;md_info_msg_wait2:
  1644                                  ;	sub	ah, ah  ; read time count
  1645                                  ;	call	int1Ah
  1646                                  ;	cmp	edx, ecx ; ; 18.2 * seconds
  1647                                  ;	jna	short md_info_msg_wait3
  1648                                  ;	xchg 	edx, ecx	
  1649                                  ;md_info_msg_wait3:
  1650                                  ;	sub	ecx, edx
  1651                                  ;	cmp	ecx, 127 ; 7 seconds (18.2 * 7)
  1652                                  ;	jb	short md_info_msg_wait1		
  1653                                  ;md_info_msg_ok:
  1654                                  
  1655                                  	; 15/12/2020
  1656                                  	; set initial values of LFB parameters
  1657                                  
  1658 000008DE 803D[64090000]02        	cmp	byte [vbe3], 2
  1659 000008E5 7225                    	jb	short di4
  1660                                  
  1661                                  	;mov	ax, [def_LFB_addr]
  1662                                  	;shl	eax, 16
  1663                                  	;mov	[LFB_ADDR], eax
  1664                                  	;mov	eax, 1024*768*3
  1665                                  	;mov	[LFB_SIZE], eax
  1666                                  
  1667 000008E7 BEFE7B0900              	mov	esi, VBE3MODEINFOBLOCK - 2
  1668 000008EC 66C7061801              	mov	word [esi], 0118h ; default vbe mode
  1669                                  				  ; 1024*768, 24bpp
  1670 000008F1 E847300000              	call	set_lfbinfo_table
  1671                                  
  1672                                  	;;;
  1673                                  	; 28/11/2023
  1674                                  	; 20/10/2023 - TRDOS 386 v2.0.7
  1675 000008F6 8B35[E00F0300]          	mov	esi, [LFB_ADDR] ; LFB base address (in bytes)
  1676                                  	;mov	edx, [LFB_SIZE] ; 28/11/2023
  1677                                  	;add	edx, 4095
  1678                                  	;;;
  1679                                  	;mov	edx, ((1024*768*4)+4095)>>12 ; 28/11/2023
  1680 000008FC BAE9070000              	mov	edx, ((1920*1080*4)+4095)>>12 ; 28/11/2023
  1681                                  	; edx = LFB size in pages
  1682                                  
  1683                                  	; 29/11/2023
  1684                                  	;mov	ebx, esi
  1685                                  	;;add	ebx, 4095 ; LFB start addr is always in page boundary
  1686                                  	;shr	ebx, 12	; convert byte address to page address
  1687 00000901 8B0D[4C770100]          	mov	ecx, [memory_size]
  1688                                  	;cmp	ebx, ecx
  1689                                  	;jnb	short di4 ; LFB addr >= main memory size	
  1690                                  	
  1691                                  	; (set the overlapped pages as allocated for kernel)
  1692                                  	;;;
  1693                                  	; 28/11/2023
  1694                                  	; (and set all of LFB pages in the kernel's page tables)
  1695                                  
  1696 00000907 E846580000              	call	allocate_lfb_pages_for_kernel
  1697                                  di4:
  1698                                  	; 08/09/2016
  1699 0000090C 0F20C0                  	mov	eax, cr0
  1700 0000090F A810                    	test	al, 10h  ; Bit 4, ET (Extension Type)
  1701 00000911 7408                    	jz	short sysinit
  1702                                  	; 27/02/2017
  1703 00000913 FE05[00840100]          	inc	byte [fpready]
  1704                                  	; 80387 (FPU) is ready
  1705 00000919 DBE3                    	fninit ; Initialize Floating-Point Unit
  1706                                  sysinit:
  1707                                  	; 30/06/2015
  1708 0000091B E86A620000              	call	sys_init
  1709                                  	;
  1710                                  	;jmp 	cpu_reset ; 22/02/2015
  1711                                  hang:  
  1712                                  	; 23/02/2015
  1713                                  	;sti			; Enable interrupts
  1714 00000920 F4                      	hlt
  1715                                  	;
  1716                                  	;nop
  1717                                  	;; 03/12/2014
  1718                                  	;; 28/08/2014
  1719                                  	;mov	ah, 11h
  1720                                  	;call	getc
  1721                                  	;jz      _c8
  1722                                  	;
  1723                                  	; 23/02/2015
  1724                                  	; 06/02/2015
  1725                                  	; 07/09/2014
  1726 00000921 31DB                    	xor	ebx, ebx
  1727 00000923 8A1D[76770100]          	mov	bl, [ptty]	; active_page
  1728 00000929 89DE                    	mov	esi, ebx
  1729                                  	;shl 	si, 1
  1730                                  	; 24/07/2022
  1731 0000092B D1E6                    	shl	esi, 1
  1732 0000092D 81C6[78770100]          	add	esi, ttychr
  1733 00000933 668B06                  	mov	ax, [esi]
  1734 00000936 6621C0                  	and	ax, ax
  1735                                  	;jz	short _c8
  1736 00000939 74E5                    	jz	short hang
  1737 0000093B 66C7060000              	mov	word [esi], 0
  1738 00000940 80FB03                  	cmp	bl, 3		; Video page 3
  1739                                  	;jb	short _c8
  1740 00000943 72DB                    	jb	short hang
  1741                                  	;	
  1742                                  	; 13/05/2016
  1743                                  	; 07/09/2014
  1744                                  nxtl:
  1745                                  	;push	bx
  1746                                  	; 18/04/2021
  1747 00000945 53                      	push	ebx
  1748 00000946 66BB0E00                	mov	bx, 0Eh 	; Yellow character 
  1749                                  				; on black background
  1750                                  				; bh = 0 (video page 0)
  1751                                  				; Retro UNIX 386 v1 - Video Mode 0
  1752                                  				; (PC/AT Video Mode 3 - 80x25 Alpha.)
  1753                                  	;push	ax
  1754                                  	; 18/04/2021
  1755 0000094A 50                      	push	eax
  1756 0000094B E821190000              	call 	_write_tty
  1757                                  	;pop	ax
  1758                                  	; 18/04/2021
  1759 00000950 58                      	pop	eax
  1760                                  	;pop	bx
  1761 00000951 5B                      	pop	ebx
  1762 00000952 3C0D                    	cmp	al, 0Dh		; carriage return (enter)
  1763                                  	;jne	short _c8
  1764 00000954 75CA                    	jne	short hang
  1765 00000956 B00A                    	mov	al, 0Ah		; next line
  1766 00000958 EBEB                    	jmp	short nxtl
  1767                                  	
  1768                                  ;_c8:
  1769                                  ;	; 25/08/2014
  1770                                  ;	cli				; Disable interrupts
  1771                                  ;	mov	al, [scounter + 1]
  1772                                  ;	and	al, al
  1773                                  ;	jnz	hang
  1774                                  ;	call	rtc_p
  1775                                  ;	jmp     hang
  1776                                  
  1777                                  	; 27/08/2014
  1778                                  	; 20/08/2014
  1779                                  printk:
  1780                                          ;mov    edi, [scr_row]
  1781                                  pkl:
  1782 0000095A AC                      	lodsb
  1783 0000095B 08C0                    	or 	al, al
  1784 0000095D 7404                    	jz	short pkr
  1785 0000095F 66AB                    	stosw
  1786 00000961 EBF7                    	jmp	short pkl
  1787                                  pkr:
  1788 00000963 C3                      	retn
  1789                                  
  1790                                  ; 14/11/2020 (TRDOS 386 v2.0.3)
  1791 00000964 00                      vbe3:	db 0  ; VESA VBE version (must be 03h)
  1792                                  	      ; for using video bios calls in protected mode
  1793                                  vbe2bios:
  1794 00000965 B0                      	db 0B0h ; 
  1795                                  ;pmid_addr: 		
  1796                                  	;dw 0  ; > 0 if 'PMID' sign is found 
  1797                                  	;     ;	('pmid' offset addr in VGA bios seg, 0C000h)
  1798                                  	;; 02/12/2020
  1799                                  	;dw 0	; 32 bit address in pmid_addr
  1800                                  		
  1801                                  ; 28/02/2017
  1802                                  ; 22/01/2017
  1803                                  ; 15/01/2017
  1804                                  ; 14/01/2017
  1805                                  ; 02/01/2017
  1806                                  ; 25/12/2016
  1807                                  ; 19/12/2016
  1808                                  ; 10/12/2016 (callback)
  1809                                  ; 06/06/2016
  1810                                  ; 23/05/2016
  1811                                  ; 22/05/2016 - TRDOS 386 (TRDOS v2.0) Timer Event Modifications
  1812                                  ; 25/07/2015
  1813                                  ; 14/05/2015 (multi tasking -time sharing- 'clock', x_timer)
  1814                                  ; 17/02/2015
  1815                                  ; 06/02/2015 (unix386.s)
  1816                                  ; 11/12/2014 - 22/12/2014 (dsectrm2.s) 
  1817                                  ;
  1818                                  ; IBM PC-XT Model 286 Source Code - BIOS2.ASM (06/10/85)
  1819                                  ;
  1820                                  ;-- HARDWARE INT  08 H - ( IRQ LEVEL 0 ) ---------------------------------------
  1821                                  ;	THIS ROUTINE HANDLES THE TIMER INTERRUPT FROM FROM CHANNEL 0 OF        :
  1822                                  ;	THE 8254 TIMER.  INPUT FREQUENCY IS 1.19318 MHZ AND THE DIVISOR        :
  1823                                  ;	IS 65536, RESULTING IN APPROXIMATELY 18.2 INTERRUPTS EVERY SECOND.     :
  1824                                  ;									       :
  1825                                  ;	THE INTERRUPT HANDLER MAINTAINS A COUNT (40:6C) OF INTERRUPTS SINCE    :
  1826                                  ;	POWER ON TIME, WHICH MAY BE USED TO ESTABLISH TIME OF DAY.	       :
  1827                                  ;	THE INTERRUPT HANDLER ALSO DECREMENTS THE MOTOR CONTROL COUNT (40:40)  :
  1828                                  ;	OF THE DISKETTE, AND WHEN IT EXPIRES, WILL TURN OFF THE 	       :
  1829                                  ;	DISKETTE MOTOR(s), AND RESET THE MOTOR RUNNING FLAGS.		       :
  1830                                  ;	THE INTERRUPT HANDLER WILL ALSO INVOKE A USER ROUTINE THROUGH	       :
  1831                                  ;	INTERRUPT 1CH AT EVERY TIME TICK.  THE USER MUST CODE A 	       :
  1832                                  ;	ROUTINE AND PLACE THE CORRECT ADDRESS IN THE VECTOR TABLE.	       :
  1833                                  ;-------------------------------------------------------------------------------
  1834                                  ;
  1835                                  
  1836                                  timer_int:	; IRQ 0
  1837                                  ;int_08h:	; Timer
  1838                                  	; 14/10/2015
  1839                                  	; Here, we are simulating system call entry (for task switch)
  1840                                  	; (If multitasking is enabled, 
  1841                                  	; 'clock' procedure may jump to 'sysrelease')
  1842                                  
  1843 00000966 1E                      	push	ds
  1844 00000967 06                      	push	es
  1845 00000968 0FA0                    	push	fs
  1846 0000096A 0FA8                    	push	gs
  1847                                  
  1848 0000096C 60                      	pushad	; eax, ecx, edx, ebx, esp -before pushad-, ebp, esi, edi
  1849 0000096D 66B91000                	mov     cx, KDATA
  1850 00000971 8ED9                            mov     ds, cx
  1851 00000973 8EC1                            mov     es, cx
  1852 00000975 8EE1                            mov     fs, cx
  1853 00000977 8EE9                            mov     gs, cx
  1854                                  
  1855 00000979 0F20D9                  	mov	ecx, cr3
  1856 0000097C 890D[28020300]          	mov	[cr3reg], ecx ; save current cr3 register value/content
  1857                                  
  1858                                  	; 14/01/2017
  1859 00000982 3B0D[48770100]          	cmp 	ecx, [k_page_dir]
  1860 00000988 7409                    	je	short T3
  1861                                  
  1862 0000098A 8B0D[48770100]          	mov	ecx, [k_page_dir]
  1863 00000990 0F22D9                  	mov	cr3, ecx
  1864                                  T3:
  1865                                  	;sti				; INTERRUPTS BACK ON
  1866 00000993 66FF05[C8770100]        	INC	word [TIMER_LOW]	; INCREMENT TIME
  1867 0000099A 7507                    	JNZ	short T4		; GO TO TEST_DAY
  1868 0000099C 66FF05[CA770100]        	INC	word [TIMER_HIGH]	; INCREMENT HIGH WORD OF TIME
  1869                                  T4:					; TEST_DAY
  1870 000009A3 66833D[CA770100]18      	CMP	word [TIMER_HIGH],018H	; TEST FOR COUNT EQUALING 24 HOURS
  1871 000009AB 7519                    	JNZ	short T5		; GO TO DISKETTE_CTL
  1872 000009AD 66813D[C8770100]B0-     	CMP	word [TIMER_LOW],0B0H
  1872 000009B5 00                 
  1873 000009B6 750E                    	JNZ	short T5		; GO TO DISKETTE_CTL
  1874                                  
  1875                                  ;-----	TIMER HAS GONE 24 HOURS
  1876                                  	;;SUB	AX,AX
  1877                                  	;MOV	[TIMER_HIGH],AX
  1878                                  	;MOV	[TIMER_LOW],AX
  1879 000009B8 29C0                    	sub	eax, eax
  1880 000009BA A3[C8770100]            	mov	[TIMER_LH], eax
  1881                                  	;	
  1882 000009BF C605[CC770100]01        	MOV	byte [TIMER_OFL],1
  1883                                  
  1884                                  ;-----	TEST FOR DISKETTE TIME OUT
  1885                                  
  1886                                  T5:
  1887                                  	; 23/12/2014
  1888 000009C6 EB1D                    	jmp	short T6		; will be replaced with nop, nop
  1889                                  					; (9090h) if a floppy disk
  1890                                  					; is detected.
  1891                                  	;mov	al,[CS:MOTOR_COUNT]
  1892 000009C8 A0[CF770100]            	mov	al, [MOTOR_COUNT]
  1893 000009CD FEC8                    	dec	al
  1894                                  	;mov	[CS:MOTOR_COUNT], al	; DECREMENT DISKETTE MOTOR CONTROL
  1895 000009CF A2[CF770100]            	mov	[MOTOR_COUNT], al
  1896                                  	;mov	[ORG_MOTOR_COUNT], al
  1897 000009D4 750F                    	JNZ	short T6		; RETURN IF COUNT NOT OUT
  1898 000009D6 B0F0                    	mov 	al,0F0h
  1899                                  	;AND	[CS:MOTOR_STATUS],al 	; TURN OFF MOTOR RUNNING BITS
  1900 000009D8 2005[CE770100]          	and	[MOTOR_STATUS], al
  1901                                  	;and	[ORG_MOTOR_STATUS], al
  1902 000009DE B00C                    	MOV	AL,0CH			; bit 3 = enable IRQ & DMA, 
  1903                                  					; bit 2 = enable controller
  1904                                  					;	1 = normal operation
  1905                                  					;	0 = reset	
  1906                                  					; bit 0, 1 = drive select
  1907                                  					; bit 4-7 = motor running bits 
  1908 000009E0 66BAF203                	MOV	DX,03F2H		; FDC CTL PORT
  1909 000009E4 EE                      	OUT	DX,AL			; TURN OFF THE MOTOR
  1910                                  T6:	
  1911                                  	;inc	word [CS:wait_count]	; 22/12/2014 (byte -> word)
  1912                                  					; TIMER TICK INTERRUPT
  1913                                  	;;inc	word [wait_count] ;;27/02/2015
  1914                                  	;INT	1CH			; TRANSFER CONTROL TO A USER ROUTINE
  1915                                  	;cli
  1916 000009E5 E85C040000              	call 	u_timer			; TRANSFER CONTROL TO A USER ROUTINE
  1917                                  	; 23/05/2016
  1918 000009EA E809150100              	call	clock			; Multi Tasking control procedure
  1919                                  T7:
  1920                                  	; 14/10/2015
  1921 000009EF B020                    	MOV	AL,EOI			; GET END OF INTERRUPT MASK
  1922 000009F1 FA                      	CLI				; DISABLE INTERRUPTS TILL STACK CLEARED
  1923 000009F2 E620                    	OUT	INTA00,AL		; END OF INTERRUPT TO 8259 - 1	
  1924                                  	;
  1925                                  rtc_int_2:
  1926                                  	; 26/12/2016
  1927                                  	;mov	ecx, [cr3reg]
  1928                                  	; 13/01/2017
  1929 000009F4 803D[90010300]00        	cmp	byte [u.t_lock], 0  	; T_LOCK
  1930 000009FB 7730                    	ja	short timer_int_return  ; Timer Lock : 'sysrele' is needed !
  1931                                  	; 28/02/2017
  1932                                  	; We need to exit if the user's IRQ callback service is in progress!
  1933                                  	; (To prevent a conflict!)
  1934 000009FD 803D[94010300]00        	cmp	byte [u.r_lock], 0	; R_LOCK, IRQ callback service lock !
  1935 00000A04 7727                    	ja	short timer_int_return  ; Timer Lock : 'sysrele' is needed !	
  1936                                  	; 15/01/2017
  1937 00000A06 803D[D4830100]02        	cmp	byte [priority], 2
  1938 00000A0D 733A                    	jnb	short T8  ; current process has a timer event (15/01/2017)
  1939                                  	; 22/05/2016
  1940 00000A0F 803D[D5830100]00        	cmp	byte [p_change], 0 ; in 'set_run_sequence', in 'rtc_p'
  1941 00000A16 7615                    	jna	short timer_int_return ; 23/05/2016
  1942                                  
  1943                                  	; 15/01/2017
  1944                                  	
  1945                                  	; present process must be changed with high priority process	
  1946                                  	;xor	al, al
  1947 00000A18 31C0                    	xor	eax, eax ; 26/12/2016
  1948 00000A1A A2[D5830100]            	mov	[p_change], al ; 0
  1949                                  	;mov	byte [priority], 2 ; 15/01/2017 (there is a timer event)
  1950                                  
  1951 00000A1F 803D[10010300]FF        	cmp     byte [sysflg], 0FFh ; user or system space ?
  1952 00000A26 7416                    	je	short rtc_int_3     ; user space ([sysflg]= 0FFh)
  1953                                  
  1954                                  	; system space, wait for 'sysret'
  1955                                  	; to change running process 	
  1956                                  	; with high priority (event) process
  1957                                  
  1958 00000A28 A2[64010300]            	mov	[u.quant], al ; 0
  1959                                  
  1960                                  timer_int_return: ; 23/05/2016 - jump from 'rtc_int' ('rtc_int_2')
  1961 00000A2D 8B0D[28020300]          	mov 	ecx, [cr3reg] 	; previous value/content of cr3 register
  1962 00000A33 0F22D9                   	mov	cr3, ecx	; restore cr3 register content
  1963                                  	;
  1964 00000A36 61                      	popad ; edi, esi, ebp, temp (icrement esp by 4), ebx, edx, ecx, eax
  1965                                  	;
  1966 00000A37 0FA9                    	pop	gs
  1967 00000A39 0FA1                    	pop	fs
  1968 00000A3B 07                      	pop	es
  1969 00000A3C 1F                      	pop	ds
  1970                                  	;
  1971 00000A3D CF                      	iretd	; return from interrupt
  1972                                  
  1973                                  rtc_int_3:
  1974 00000A3E FE05[10010300]          	inc	byte [sysflg] 	; now, we are in system space
  1975                                  	;
  1976 00000A44 E947C30000                      jmp     sysrelease ; change running process immediatelly 
  1977                                  
  1978                                  T8:
  1979                                  	; 13/01/2017 (eax -> ebx)
  1980                                  	; callback checking... (19/12/2016)
  1981 00000A49 31DB                    	xor	ebx, ebx
  1982 00000A4B 871D[8C010300]          	xchg	ebx, [u.tcb] ; callback address (0 = normal return)
  1983 00000A51 09DB                    	or	ebx, ebx
  1984 00000A53 74D8                    	jz	short timer_int_return
  1985                                  
  1986                                  	; Set user's callback routine as return address from this interrupt
  1987                                  	; and set normal return address as return address from callback
  1988                                  	; routine!!! (19/12/2016)
  1989                                  	
  1990                                  	; 14/01/2017
  1991                                  	; 13/01/2017 - Timer Lock (T_LOCK)
  1992 00000A55 FE05[90010300]          	inc	byte [u.t_lock]
  1993 00000A5B 8A0D[10010300]          	mov	cl, [sysflg]
  1994 00000A61 880D[91010300]          	mov	[u.t_mode], cl 
  1995                                  
  1996 00000A67 8B2D[E4760100]          	mov	ebp, [tss.esp0] ; kernel stack address (for ring 0)
  1997 00000A6D 83ED14                  	sub	ebp, 20		; eip, cs, eflags, esp, ss
  1998 00000A70 892D[14010300]           	mov	[u.sp], ebp
  1999 00000A76 8925[18010300]          	mov	[u.usp], esp
  2000                                  
  2001                                  	;or	word [ebp+8], 200h ; 22/01/2017, force enabling interrupts
  2002                                  
  2003 00000A7C 8B44241C                	mov	eax, [esp+28] ; pushed eax
  2004 00000A80 A3[1C010300]            	mov	[u.r0], eax
  2005                                  
  2006 00000A85 E8DB010100              	call	wswap ; save user's registers & status
  2007                                  
  2008                                  	; software int is in ring 0 but timer int must return to ring 3
  2009                                  	; so, ring 3 return address and stack registers
  2010                                  	; (eip, cs, eflags, esp, ss) 
  2011                                  	; must be copied to timer int return
  2012                                  	; eip will be replaced by callback service routine address
  2013                                  
  2014 00000A8A C605[10010300]FF        	mov	byte [sysflg], 0FFh ; user mode
  2015                                  
  2016                                  	; system mode (system call)
  2017                                  	;mov	ebp, [u.sp] ; EIP (u), CS (UCODE), EFLAGS (u),
  2018                                  			    ; ESP (u), SS (UDATA)
  2019                                  
  2020 00000A91 8B4510                  	mov	eax, [ebp+16]	; SS (UDATA
  2021 00000A94 89E6                    	mov	esi, esp
  2022 00000A96 50                      	push	eax
  2023 00000A97 50                      	push	eax
  2024 00000A98 89E7                    	mov	edi, esp
  2025 00000A9A 893D[18010300]          	mov	[u.usp], edi
  2026 00000AA0 B908000000              	mov	ecx, ((ESPACE/4) - 4) ; except DS, ES, FS, GS
  2027 00000AA5 F3A5                    	rep	movsd
  2028 00000AA7 B104                    	mov	cl, 4	
  2029 00000AA9 F3AB                    	rep	stosd
  2030 00000AAB 893D[14010300]          	mov	[u.sp], edi
  2031 00000AB1 89EE                    	mov	esi, ebp
  2032 00000AB3 B105                    	mov	cl, 5 ; EIP (u), CS (UCODE), EFLAGS (u), ESP (u), SS (UDATA)
  2033 00000AB5 F3A5                    	rep	movsd
  2034                                  
  2035 00000AB7 8B0D[74010300]          	mov	ecx, [u.pgdir]
  2036 00000ABD 890D[28020300]          	mov	[cr3reg], ecx
  2037                                  
  2038                                  	; 13/01/207 (eax -> ebx)
  2039                                  	; EBX = callback routine address (virtual, not physical address!)
  2040                                  
  2041                                  	; 09/01/2017
  2042                                  	; !!! CALLBACK ROUTINE MUST BE ENDED/RETURNED WITH 'sysrele'
  2043                                  	;     system call !!!	
  2044                                  	; 25/12/2016
  2045                                  	; Callback Note: (19/12/2016)
  2046                                  	; !!! CALLBACK ROUTINE MUST BE ENDED/RETURNED WITH 'RETN' !!!
  2047                                  	;	pushf ; save flags	
  2048                                  	; 	<callback service code>
  2049                                  	; 	popf  ; restore flags
  2050                                  	; 	retn ; return to normal running address
  2051                                  	;
  2052                                  
  2053                                  	; 15/01/2017
  2054                                  	; 14/01/2017
  2055                                  	; 13/01/2017 (eax -> ebx)
  2056                                  	; 10/01/2017
  2057                                  set_callback_addr:
  2058                                  	; 09/01/2017 (**)
  2059                                  	; 02/01/2017 (*)
  2060                                  	; 25/12/2016 (*)
  2061                                  	; 19/12/2016 (TRDOS 386 feature only!)
  2062                                  	;
  2063                                  	; This routine sets return address
  2064                                  	; to start of user's interrupt
  2065                                  	; service (callback) address
  2066                                  	;; and sets callback 'retn' address to normal
  2067                                  	;; return address of user's running code! 
  2068                                  	;
  2069                                  	; INPUT:
  2070                                  	;	EBX = callback routine/service address
  2071                                  	;	      (virtual, not physical address!)	
  2072                                  	;	[u.sp] = kernel stack, points to
  2073                                  	;		 user's EIP,CS,EFLAGS,ESP,SS
  2074                                  	;		 registers.
  2075                                  	; OUTPUT:
  2076                                  	;	EIP (user) = callback (service) address
  2077                                  	;	CS (user) = UCODE
  2078                                  	;	EFLAGS (user) = flags before callback 	 
  2079                                  	;       ESP (user) = ESP-4 (user, before callback) 
  2080                                  	;	[ESP](user) = EIP (user) before callback
  2081                                  	;
  2082                                  	; Note: If CPU was in user mode while entering 
  2083                                  	;	the timer interrupt service routine,
  2084                                  	;	'IRET' will get return to callback routine
  2085                                  	;	immediately. If CPU was in system/kernel mode  
  2086                                  	;	'iret' will get return to system call and
  2087                                  	;	then, callback routine will be return address
  2088                                  	;	from system call. (User's callback/service code
  2089                                  	;	will be able to return to normal return address
  2090                                  	;	via an 'retn' at the end.) 
  2091                                  	;
  2092                                  	; Note(**): User's callback service code must be ended
  2093                                  	;	with a 'sysrele' sytstem call ! (09/01/2017)
  2094                                  	;
  2095                                  	;	For example:
  2096                                  	;
  2097                                  	;	timer_callback:
  2098                                  	;	    ...	 
  2099                                    	;	    inc	dword [time_counter]
  2100                                  	;	    ...
  2101                                  	;	    mov eax, 39 ; 'sysrele'
  2102                                  	;	    int 40h ; TRDOS 386 system call (interrupt)		
  2103                                  	;
  2104                                  	;
  2105                                  	;; Note(*): User's callback service code must preserve cpu 
  2106                                  	;;	flags if it has any instructions which changes
  2107                                  	;;	flags in the service code. (25/12/2016)
  2108                                  	;;
  2109                                  	;;	For example:
  2110                                  	;;
  2111                                  	;;	timer_callback:
  2112                                  	;;	    pushf ; save flags
  2113                                  	;;	    ; this instruction changes zero flag
  2114                                    	;;	    inc	dword [time_counter]
  2115                                  	;;	    popf ; restore flags
  2116                                  	;;	    retn ; return to normal user code
  2117                                  	;;		  (which is interrupted by the 
  2118                                  	;;		   timer interput) 	
  2119                                  	;;
  2120                                  
  2121                                  	; 15/01/2017
  2122 00000AC3 8B2D[14010300]          	mov	ebp, [u.sp]; kernel's stack, points to EIP (user)
  2123 00000AC9 895D00                  	mov	[ebp], ebx
  2124 00000ACC E95CFFFFFF              	jmp	timer_int_return
  2125                                  
  2126                                  	; 15/01/2017
  2127                                  	; 13/01/2017
  2128                                  	; 19/12/2016
  2129                                  	; 06/06/2016
  2130                                  	; 23/05/2016
  2131                                  	; 22/05/2016
  2132                                  	; 19/05/2016 - TRDOS 386 (TRDOS v2.0)
  2133                                  	; 26/02/2015
  2134                                  	; 07/09/2014
  2135                                  	; 25/08/2014
  2136                                  rtc_int:       ; Real Time Clock Interrupt (IRQ 8)
  2137                                  	; 22/05/2016
  2138 00000AD1 1E                      	push	ds ; ** ; 23/05/2016
  2139 00000AD2 50                      	push	eax ; *
  2140 00000AD3 66B81000                	mov	ax, KDATA
  2141 00000AD7 8ED8                    	mov	ds, ax
  2142                                  	;
  2143 00000AD9 8A25[C6770100]          	mov	ah, [RTC_2Hz] ;  2 Hz interrupt to 1 Hz function
  2144 00000ADF 80F401                  	xor	ah, 1
  2145 00000AE2 8825[C6770100]          	mov	[RTC_2Hz], ah ; 1 = 0.5 second, 0 = 1 second
  2146 00000AE8 753B                    	jnz	short rtc_int_return ; half second
  2147                                  	; 1 second
  2148                                  rtc_int_0:
  2149                                  	; 22/05/2016
  2150 00000AEA 58                      	pop	eax ; *
  2151                                  	;
  2152                                  	; 14/10/2015 ('timer_int')
  2153                                  	; Here, we are simulating system call entry (for task switch)
  2154                                  	; (If multitasking is enabled, 
  2155                                  	; 'clock' procedure may jump to 'sysrelease')
  2156                                  	;push	ds ; ** ; 23/05/2016
  2157 00000AEB 06                      	push	es
  2158 00000AEC 0FA0                    	push	fs
  2159 00000AEE 0FA8                    	push	gs
  2160 00000AF0 60                      	pushad  ; eax, ecx, edx, ebx, esp -before pushad-, ebp, esi, edi
  2161 00000AF1 66B91000                	mov     cx, KDATA
  2162                                          ;mov    ds, cx ; 06/06/2016
  2163 00000AF5 8EC1                            mov     es, cx
  2164 00000AF7 8EE1                            mov     fs, cx
  2165 00000AF9 8EE9                            mov     gs, cx
  2166                                  	;
  2167 00000AFB 0F20D9                  	mov	ecx, cr3
  2168 00000AFE 890D[28020300]          	mov	[cr3reg], ecx ; save current cr3 register value/content
  2169                                  	;
  2170 00000B04 803D[90010300]00        	cmp	byte [u.t_lock], 0 ; timer lock (callback) status ?
  2171 00000B0B 7711                    	ja	short rtc_int_1	   ; yes
  2172                                  
  2173                                  	; 15/01/2017
  2174 00000B0D 3B0D[48770100]          	cmp 	ecx, [k_page_dir]
  2175 00000B13 7409                    	je	short rtc_int_1
  2176                                  
  2177 00000B15 8B0D[48770100]          	mov	ecx, [k_page_dir]
  2178 00000B1B 0F22D9                  	mov	cr3, ecx
  2179                                  rtc_int_1:
  2180                                  	; Timer event (kernel) functions must be performed with
  2181                                  	; 1 second intervals - TRDOS 386 (TRDOS v2.0) feature ! -
  2182                                   	;	
  2183                                  	; 25/08/2014
  2184 00000B1E E81F030000              	call	rtc_p  ; 19/05/2016 - major modification 
  2185                                  	
  2186                                  	; 23/05/2016
  2187 00000B23 28E4                    	sub	ah, ah ; 0
  2188                                  	; 22/05/2016 - TRDOS 386 timer event modifications
  2189                                  rtc_int_return: ; 19/05/2016
  2190                                  	; 22/02/2015 - dsectpm.s
  2191                                  	; [ source: http://wiki.osdev.org/RTC ]
  2192                                  	; read status register C to complete procedure
  2193                                  	;(it is needed to get a next IRQ 8) 
  2194 00000B25 B00C                    	mov	al, 0Ch ; 
  2195 00000B27 E670                    	out	70h, al ; select register C
  2196 00000B29 90                      	nop
  2197 00000B2A E471                    	in	al, 71h ; just throw away contents
  2198                                  	; 22/02/2015
  2199 00000B2C B020                    	MOV	AL,EOI		; END OF INTERRUPT
  2200                                  	;CLI			; DISABLE INTERRUPTS TILL STACK CLEARED
  2201 00000B2E E6A0                    	OUT	INTB00,AL	; FOR CONTROLLER #2
  2202                                  
  2203                                  	; 23/05/2016
  2204 00000B30 B020                    	MOV	AL,EOI		; GET END OF INTERRUPT MASK
  2205 00000B32 FA                      	CLI			; DISABLE INTERRUPTS TILL STACK CLEARED
  2206 00000B33 E620                    	OUT	INTA00,AL	; END OF INTERRUPT TO 8259 - 1	
  2207                                  	;
  2208                                  	; 23/05/2016
  2209 00000B35 20E4                    	and	ah, ah
  2210                                  	;jz	rtc_int_2
  2211                                  	; 24/07/2022
  2212 00000B37 7505                    	jnz	short rtc_int_4
  2213 00000B39 E9B6FEFFFF              	jmp	rtc_int_2
  2214                                  rtc_int_4:
  2215                                  	; ah = 1 (half second)
  2216 00000B3E 58                      	pop	eax ; *
  2217 00000B3F 1F                      	pop	ds  ; **
  2218 00000B40 CF                      	iretd
  2219                                  
  2220                                  ; ////////////////
  2221                                  
  2222                                  	; 28/08/2014
  2223                                  irq0:
  2224 00000B41 6A00                            push 	dword 0
  2225 00000B43 EB48                    	jmp	short which_irq
  2226                                  irq1:
  2227 00000B45 6A01                            push 	dword 1
  2228 00000B47 EB44                    	jmp	short which_irq
  2229                                  irq2:
  2230 00000B49 6A02                            push 	dword 2
  2231 00000B4B EB40                    	jmp	short which_irq
  2232                                  irq3:
  2233                                  	; 20/11/2015
  2234                                  	; 24/10/2015
  2235 00000B4D 2EFF15[68200100]        	call	dword [cs:com2_irq3]
  2236 00000B54 6A03                    	push 	dword 3
  2237 00000B56 EB35                    	jmp	short which_irq
  2238                                  irq4:
  2239                                  	; 20/11/2015
  2240                                  	; 24/10/2015
  2241 00000B58 2EFF15[64200100]        	call	dword [cs:com1_irq4]
  2242 00000B5F 6A04                            push 	dword 4
  2243 00000B61 EB2A                    	jmp	short which_irq
  2244                                  irq5:
  2245 00000B63 6A05                            push 	dword 5
  2246 00000B65 EB26                    	jmp	short which_irq
  2247                                  irq6:
  2248 00000B67 6A06                            push 	dword 6
  2249 00000B69 EB22                    	jmp	short which_irq
  2250                                  irq7:
  2251 00000B6B 6A07                            push 	dword 7
  2252 00000B6D EB1E                    	jmp	short which_irq
  2253                                  irq8:
  2254 00000B6F 6A08                            push 	dword 8
  2255 00000B71 EB1A                    	jmp	short which_irq
  2256                                  irq9:
  2257 00000B73 6A09                            push 	dword 9
  2258 00000B75 EB16                    	jmp	short which_irq
  2259                                  irq10:
  2260 00000B77 6A0A                            push 	dword 10
  2261 00000B79 EB12                    	jmp	short which_irq
  2262                                  irq11:
  2263 00000B7B 6A0B                            push 	dword 11
  2264 00000B7D EB0E                    	jmp	short which_irq
  2265                                  irq12:
  2266 00000B7F 6A0C                            push 	dword 12
  2267 00000B81 EB0A                    	jmp	short which_irq
  2268                                  irq13:
  2269 00000B83 6A0D                            push 	dword 13
  2270 00000B85 EB06                    	jmp	short which_irq
  2271                                  irq14:
  2272 00000B87 6A0E                            push 	dword 14
  2273 00000B89 EB02                    	jmp	short which_irq
  2274                                  irq15:
  2275 00000B8B 6A0F                            push 	dword 15
  2276                                  	;jmp	short which_irq
  2277                                  
  2278                                  	; 22/01/2017
  2279                                  	; 19/10/2015
  2280                                  	; 29/08/2014
  2281                                  	; 21/08/2014
  2282                                  which_irq:
  2283 00000B8D 870424                  	xchg	eax, [esp]  ; 28/08/2014
  2284 00000B90 53                      	push	ebx
  2285 00000B91 56                      	push	esi
  2286 00000B92 57                      	push	edi
  2287 00000B93 1E                      	push 	ds
  2288 00000B94 06                      	push 	es
  2289                                  	;
  2290 00000B95 88C3                    	mov	bl, al
  2291                                  	;
  2292 00000B97 B810000000              	mov	eax, KDATA
  2293 00000B9C 8ED8                    	mov	ds, ax
  2294 00000B9E 8EC0                    	mov	es, ax
  2295                                  	; 19/10/2015
  2296 00000BA0 FC                      	cld
  2297                                          ; 27/08/2014
  2298 00000BA1 8105[22370100]A000-             add     dword [scr_row], 0A0h
  2298 00000BA9 0000               
  2299                                  	;
  2300 00000BAB B417                    	mov	ah, 17h	; blue (1) background, 
  2301                                  			; light gray (7) forecolor
  2302 00000BAD 8B3D[22370100]                  mov     edi, [scr_row]
  2303 00000BB3 B049                    	mov	al, 'I'
  2304 00000BB5 66AB                    	stosw
  2305 00000BB7 B052                    	mov	al, 'R'
  2306 00000BB9 66AB                    	stosw
  2307 00000BBB B051                    	mov	al, 'Q'
  2308 00000BBD 66AB                    	stosw
  2309 00000BBF B020                    	mov	al, ' '
  2310 00000BC1 66AB                    	stosw
  2311 00000BC3 88D8                    	mov	al, bl
  2312 00000BC5 3C0A                    	cmp	al, 10
  2313 00000BC7 7208                    	jb	short ii1
  2314 00000BC9 B031                    	mov	al, '1'
  2315 00000BCB 66AB                    	stosw
  2316 00000BCD 88D8                    	mov	al, bl
  2317 00000BCF 2C0A                    	sub	al, 10
  2318                                  ii1:
  2319 00000BD1 0430                    	add	al, '0'
  2320 00000BD3 66AB                    	stosw
  2321 00000BD5 B020                    	mov	al, ' '
  2322 00000BD7 66AB                    	stosw
  2323 00000BD9 B021                    	mov	al, '!'
  2324 00000BDB 66AB                    	stosw
  2325 00000BDD B020                    	mov	al, ' '
  2326 00000BDF 66AB                    	stosw
  2327                                  	; 23/02/2015
  2328 00000BE1 80FB07                  	cmp	bl, 7 ; check for IRQ 8 to IRQ 15 
  2329 00000BE4 7604                    	jna	ii2
  2330                                  	; 22/01/2017
  2331 00000BE6 B020                    	mov	al, 20h  ; END OF INTERRUPT COMMAND TO
  2332 00000BE8 E6A0                    	out	0A0h, al ; the 2nd 8259
  2333                                  ii2:
  2334 00000BEA B020                    	mov	al, 20h  ; END OF INTERRUPT COMMAND TO
  2335 00000BEC E620                    	out	20h, al ; the 2nd 8259
  2336 00000BEE E9D1010000              	jmp     iiret
  2337                                  	;
  2338                                  	; 22/08/2014
  2339                                  	;mov	al, 20h ; END OF INTERRUPT COMMAND TO 8259
  2340                                  	;out	20h, al	; 8259 PORT
  2341                                  	;
  2342                                  	;pop	es
  2343                                  	;pop	ds
  2344                                  	;pop	edi
  2345                                  	;pop	esi
  2346                                  	;pop	ebx
  2347                                  	;pop 	eax
  2348                                  	;iret
  2349                                  
  2350                                  	; 02/04/2015
  2351                                  	; 25/08/2014
  2352                                  exc0:
  2353 00000BF3 6A00                            push 	dword 0
  2354 00000BF5 E990000000                      jmp     cpu_except
  2355                                  exc1:
  2356 00000BFA 6A01                            push 	dword 1
  2357 00000BFC E989000000                      jmp     cpu_except
  2358                                  exc2:
  2359 00000C01 6A02                            push 	dword 2
  2360 00000C03 E982000000                      jmp     cpu_except
  2361                                  exc3:
  2362 00000C08 6A03                            push 	dword 3
  2363 00000C0A EB7E                            jmp     cpu_except
  2364                                  exc4:
  2365 00000C0C 6A04                            push 	dword 4
  2366 00000C0E EB7A                            jmp     cpu_except
  2367                                  exc5:
  2368 00000C10 6A05                            push 	dword 5
  2369 00000C12 EB76                            jmp     cpu_except
  2370                                  exc6:
  2371 00000C14 6A06                            push 	dword 6
  2372 00000C16 EB72                            jmp     cpu_except
  2373                                  exc7:
  2374 00000C18 6A07                            push 	dword 7
  2375 00000C1A EB6E                            jmp     cpu_except
  2376                                  exc8:
  2377                                  	; [esp] = Error code
  2378 00000C1C 6A08                            push 	dword 8
  2379 00000C1E EB5C                            jmp     cpu_except_en
  2380                                  exc9:
  2381 00000C20 6A09                            push 	dword 9
  2382 00000C22 EB66                            jmp     cpu_except
  2383                                  exc10:
  2384                                  	; [esp] = Error code
  2385 00000C24 6A0A                            push 	dword 10
  2386 00000C26 EB54                            jmp     cpu_except_en
  2387                                  exc11:
  2388                                  	; [esp] = Error code
  2389 00000C28 6A0B                            push 	dword 11
  2390 00000C2A EB50                            jmp     cpu_except_en
  2391                                  exc12:
  2392                                  	; [esp] = Error code
  2393 00000C2C 6A0C                            push 	dword 12
  2394 00000C2E EB4C                            jmp     cpu_except_en
  2395                                  exc13:
  2396                                  	; [esp] = Error code
  2397 00000C30 6A0D                            push 	dword 13
  2398 00000C32 EB48                            jmp     cpu_except_en
  2399                                  exc14:
  2400                                  	; [esp] = Error code
  2401 00000C34 6A0E                            push 	dword 14
  2402 00000C36 EB44                    	jmp	short cpu_except_en
  2403                                  exc15:
  2404 00000C38 6A0F                            push 	dword 15
  2405 00000C3A EB4E                            jmp     cpu_except
  2406                                  exc16:
  2407 00000C3C 6A10                            push 	dword 16
  2408 00000C3E EB4A                            jmp     cpu_except
  2409                                  exc17:
  2410                                  	; [esp] = Error code
  2411 00000C40 6A11                            push 	dword 17
  2412 00000C42 EB38                    	jmp	short cpu_except_en
  2413                                  exc18:
  2414 00000C44 6A12                            push 	dword 18
  2415 00000C46 EB42                    	jmp	short cpu_except
  2416                                  exc19:
  2417 00000C48 6A13                            push 	dword 19
  2418 00000C4A EB3E                    	jmp	short cpu_except
  2419                                  exc20:
  2420 00000C4C 6A14                            push 	dword 20
  2421 00000C4E EB3A                    	jmp	short cpu_except
  2422                                  exc21:
  2423 00000C50 6A15                            push 	dword 21
  2424 00000C52 EB36                    	jmp	short cpu_except
  2425                                  exc22:
  2426 00000C54 6A16                            push 	dword 22
  2427 00000C56 EB32                    	jmp	short cpu_except
  2428                                  exc23:
  2429 00000C58 6A17                            push 	dword 23
  2430 00000C5A EB2E                    	jmp	short cpu_except
  2431                                  exc24:
  2432 00000C5C 6A18                            push 	dword 24
  2433 00000C5E EB2A                    	jmp	short cpu_except
  2434                                  exc25:
  2435 00000C60 6A19                            push 	dword 25
  2436 00000C62 EB26                    	jmp	short cpu_except
  2437                                  exc26:
  2438 00000C64 6A1A                            push 	dword 26
  2439 00000C66 EB22                    	jmp	short cpu_except
  2440                                  exc27:
  2441 00000C68 6A1B                            push 	dword 27
  2442 00000C6A EB1E                    	jmp	short cpu_except
  2443                                  exc28:
  2444 00000C6C 6A1C                            push 	dword 28
  2445 00000C6E EB1A                    	jmp	short cpu_except
  2446                                  exc29:
  2447 00000C70 6A1D                            push 	dword 29
  2448 00000C72 EB16                    	jmp	short cpu_except
  2449                                  exc30:
  2450 00000C74 6A1E                            push 	dword 30
  2451 00000C76 EB04                    	jmp	short cpu_except_en
  2452                                  exc31:
  2453 00000C78 6A1F                            push 	dword 31
  2454 00000C7A EB0E                            jmp     short cpu_except
  2455                                  
  2456                                  	; 19/10/2015
  2457                                  	; 19/09/2015
  2458                                  	; 01/09/2015
  2459                                  	; 28/08/2015
  2460                                  	; 28/08/2014
  2461                                  cpu_except_en:
  2462 00000C7C 87442404                	xchg	eax, [esp+4] ; Error code
  2463 00000C80 36A3[2C030300]          	mov	[ss:error_code], eax
  2464 00000C86 58                      	pop	eax  ; Exception number
  2465 00000C87 870424                  	xchg	eax, [esp]
  2466                                  		; eax = eax before exception
  2467                                  		; [esp] -> exception number
  2468                                  		; [esp+4] -> EIP to return
  2469                                  	; 22/01/2017
  2470                                  	; 19/10/2015
  2471                                  	; 19/09/2015
  2472                                  	; 01/09/2015
  2473                                  	; 28/08/2015
  2474                                  	; 29/08/2014
  2475                                  	; 28/08/2014
  2476                                  	; 25/08/2014
  2477                                  	; 21/08/2014
  2478                                  cpu_except:	; CPU Exceptions
  2479 00000C8A FC                      	cld
  2480 00000C8B 870424                  	xchg	eax, [esp] 
  2481                                  		; eax = Exception number
  2482                                  		; [esp] = eax (before exception)	
  2483 00000C8E 53                      	push	ebx
  2484 00000C8F 56                      	push	esi
  2485 00000C90 57                      	push	edi
  2486 00000C91 1E                      	push 	ds
  2487 00000C92 06                      	push 	es
  2488                                  	; 28/08/2015
  2489 00000C93 66BB1000                	mov	bx, KDATA
  2490 00000C97 8EDB                    	mov	ds, bx
  2491 00000C99 8EC3                    	mov	es, bx
  2492 00000C9B 0F20DB                  	mov	ebx, cr3
  2493 00000C9E 53                      	push	ebx ; (*) page directory
  2494                                  	; 19/10/2015
  2495 00000C9F FC                      	cld
  2496                                  	; 25/03/2015
  2497 00000CA0 8B1D[48770100]          	mov	ebx, [k_page_dir]
  2498 00000CA6 0F22DB                  	mov	cr3, ebx
  2499                                  	; 28/08/2015
  2500 00000CA9 83F80E                  	cmp	eax, 0Eh ; 14, PAGE FAULT	
  2501 00000CAC 7510                    	jne	short cpu_except_nfp
  2502 00000CAE E8E74C0000              	call	page_fault_handler
  2503 00000CB3 21C0                    	and 	eax, eax
  2504                                  	;jz	iiretp ; 01/09/2015
  2505                                  	; 24/07/2022
  2506 00000CB5 7505                    	jnz	short cpu_except_pf
  2507 00000CB7 E904010000              	jmp	iiretp
  2508                                  cpu_except_pf:	; 24/07/2022
  2509 00000CBC B00E                    	mov	al, 0Eh ; 14
  2510                                  cpu_except_nfp:
  2511                                  	; 23/08/2016
  2512 00000CBE 803D[1E670000]03        	cmp	byte [CRT_MODE], 3
  2513 00000CC5 7409                    	je	short cpu_except_mode_3
  2514 00000CC7 50                      	push	eax
  2515 00000CC8 B003                    	mov	al, 3
  2516 00000CCA E8500E0000              	call	_set_mode
  2517 00000CCF 58                      	pop	eax
  2518                                  cpu_except_mode_3:
  2519                                  	; 02/04/2015
  2520 00000CD0 BB[20090000]            	mov	ebx, hang
  2521 00000CD5 875C241C                	xchg	ebx, [esp+28]
  2522                                  		; EIP (points to instruction which faults)
  2523                                  	  	; New EIP (hang)
  2524 00000CD9 891D[30030300]          	mov	[FaultOffset], ebx
  2525 00000CDF C744242008000000        	mov	dword [esp+32], KCODE ; kernel's code segment
  2526 00000CE7 814C242400020000        	or	dword [esp+36], 200h ; enable interrupts (set IF)
  2527                                  	;
  2528 00000CEF 88C4                    	mov	ah, al
  2529 00000CF1 240F                    	and	al, 0Fh
  2530 00000CF3 3C09                    	cmp	al, 9
  2531 00000CF5 7602                    	jna	short h1ok
  2532 00000CF7 0407                    	add	al, 'A'-':'
  2533                                  h1ok:
  2534 00000CF9 C0EC04                  	shr	ah, 4
  2535 00000CFC 80FC09                  	cmp	ah, 9
  2536 00000CFF 7603                    	jna	short h2ok
  2537 00000D01 80C407                  	add	ah, 'A'-':'
  2538                                  h2ok:	
  2539 00000D04 86E0                    	xchg 	ah, al	
  2540 00000D06 66053030                	add	ax, '00'
  2541 00000D0A 66A3[7C390100]          	mov	[excnstr], ax
  2542                                  	;
  2543                                  	; 29/08/2014
  2544 00000D10 A1[30030300]            	mov	eax, [FaultOffset]
  2545 00000D15 51                      	push	ecx
  2546 00000D16 52                      	push	edx
  2547 00000D17 89E3                    	mov	ebx, esp
  2548                                  	; 28/08/2015
  2549 00000D19 B910000000              	mov	ecx, 16	  ; divisor value to convert binary number
  2550                                  			  ; to hexadecimal string
  2551                                  	;mov	ecx, 10	    ; divisor to convert	
  2552                                  			    ; binary number to decimal string
  2553                                  b2d1:
  2554 00000D1E 31D2                    	xor	edx, edx
  2555 00000D20 F7F1                    	div	ecx
  2556                                  	;push	dx
  2557                                  	; 18/04/2021
  2558 00000D22 52                      	push	edx
  2559 00000D23 39C8                    	cmp	eax, ecx
  2560 00000D25 73F7                    	jnb	short b2d1
  2561 00000D27 BF[87390100]            	mov	edi, EIPstr ; EIP value
  2562                                  			    ; points to instruction which faults	
  2563                                  	; 28/08/2015
  2564 00000D2C 89C2                    	mov	edx, eax
  2565                                  b2d2:
  2566                                  	;add	al, '0'
  2567 00000D2E 8A82[9F410000]          	mov	al, [edx+hexchrs]
  2568 00000D34 AA                      	stosb		    ; write hexadecimal digit to its place	
  2569 00000D35 39E3                    	cmp	ebx, esp
  2570 00000D37 7605                    	jna	short b2d3
  2571                                  	;pop	ax
  2572                                  	; 18/04/2021
  2573 00000D39 58                      	pop	eax
  2574 00000D3A 88C2                    	mov	dl, al
  2575 00000D3C EBF0                    	jmp	short b2d2
  2576                                  b2d3:
  2577 00000D3E B068                    	mov 	al, 'h' ; 28/08/2015
  2578 00000D40 AA                      	stosb
  2579 00000D41 B020                    	mov	al, 20h	    ; space
  2580 00000D43 AA                      	stosb
  2581 00000D44 30C0                    	xor	al, al	    ; to do it an ASCIIZ string	
  2582 00000D46 AA                      	stosb
  2583                                  	;
  2584 00000D47 5A                      	pop	edx
  2585 00000D48 59                      	pop	ecx
  2586                                  	;
  2587 00000D49 B44F                    	mov	ah, 4Fh	; red (4) background, 
  2588                                  			; white (F) forecolor
  2589 00000D4B BE[6C390100]            	mov	esi, exc_msg ; message offset
  2590                                  	;
  2591                                  	; 20/01/2017 (!cpu exception!)
  2592                                  	;
  2593 00000D50 8105[22370100]A000-             add    dword [scr_row], 0A0h
  2593 00000D58 0000               
  2594 00000D5A 8B3D[22370100]                  mov    edi, [scr_row]
  2595                                  	;	
  2596 00000D60 C605[10010300]00        	mov	byte [sysflg], 0  ; system mode
  2597 00000D67 FB                              sti
  2598                                  	;
  2599 00000D68 E8EDFBFFFF              	call 	printk
  2600                                  	;
  2601 00000D6D B410                    	mov	ah, 10h
  2602 00000D6F E884010000              	call	int16h ; getc
  2603                                  	;
  2604 00000D74 B003                    	mov	al, 3
  2605 00000D76 E8A40D0000              	call	_set_mode
  2606                                  	;
  2607                                  	;mov	eax, 1
  2608                                  	; 29/11/2023 ('panic' bugfix) ; (*)
  2609 00000D7B 31C0                    	xor	eax, eax
  2610                                  	; set sysflag to user mode to prevent trap inside (panic)
  2611 00000D7D C605[10010300]FF        	mov	byte [sysflg], 0FFh ; -1 ; (*)
  2612 00000D84 40                      	inc	eax
  2613                                  	; eax = 1	
  2614 00000D85 E922C10000              	jmp	sysexit ; terminate process !!!
  2615                                  	
  2616                                  	; 22/01/2017
  2617                                  	; 18/04/2016
  2618                                  	; 28/08/2015
  2619                                  	; 23/02/2015
  2620                                  	; 20/08/2014
  2621                                  ignore_int:
  2622 00000D8A 50                      	push	eax
  2623 00000D8B 53                      	push	ebx ; 23/02/2015
  2624 00000D8C 56                      	push	esi
  2625 00000D8D 57                      	push	edi
  2626 00000D8E 1E                      	push 	ds
  2627 00000D8F 06                      	push 	es
  2628                                  	; 18/04/2016
  2629 00000D90 66B81000                	mov	ax, KDATA
  2630 00000D94 8ED8                    	mov	ds, ax
  2631 00000D96 8EC0                    	mov	es, ax
  2632                                  	; 28/08/2015
  2633 00000D98 0F20D8                  	mov	eax, cr3
  2634 00000D9B 50                      	push	eax ; (*) page directory
  2635                                  	;
  2636 00000D9C B467                    	mov	ah, 67h	; brown (6) background, 
  2637                                  			; light gray (7) forecolor
  2638 00000D9E BE[34380100]            	mov	esi, int_msg ; message offset
  2639                                  piemsg:
  2640                                          ; 27/08/2014
  2641 00000DA3 8105[22370100]A000-             add     dword [scr_row], 0A0h
  2641 00000DAB 0000               
  2642 00000DAD 8B3D[22370100]                  mov     edi, [scr_row]
  2643                                          ;
  2644 00000DB3 E8A2FBFFFF              	call 	printk
  2645                                  	;
  2646                                  	; 23/02/2015
  2647 00000DB8 B020                    	mov	al, 20h  ; END OF INTERRUPT COMMAND TO
  2648 00000DBA E6A0                    	out	0A0h, al ; the 2nd 8259
  2649                                  	; 22/08/2014
  2650 00000DBC B020                    	mov	al, 20h ; END OF INTERRUPT COMMAND TO 8259
  2651 00000DBE E620                    	out	20h, al	; 8259 PORT
  2652                                  iiretp: 
  2653                                  	; 22/01/2017
  2654                                  	; 01/09/2015
  2655                                  	; 28/08/2015
  2656 00000DC0 58                      	pop	eax ; (*) page directory
  2657 00000DC1 0F22D8                  	mov	cr3, eax
  2658                                  iiret:
  2659 00000DC4 07                      	pop	es
  2660 00000DC5 1F                      	pop	ds
  2661 00000DC6 5F                      	pop	edi
  2662 00000DC7 5E                      	pop	esi
  2663 00000DC8 5B                      	pop	ebx ; 29/08/2014
  2664 00000DC9 58                      	pop 	eax
  2665 00000DCA CF                      	iretd
  2666                                  
  2667                                  	; 23/05/2016
  2668                                  	; 22/08/2014
  2669                                  	; IBM PC/AT BIOS source code ----- 10/06/85 (bios.asm)
  2670                                  	; (INT 1Ah)
  2671                                  	;; Linux (v0.12) source code (main.c) by Linus Torvalds (1991)
  2672                                  time_of_day:
  2673 00000DCB E845560000              	call	UPD_IPR			; WAIT TILL UPDATE NOT IN PROGRESS
  2674 00000DD0 726F                            jc      short time_of_day_retn ; 23/05/2016
  2675 00000DD2 B000                    	mov	al, CMOS_SECONDS
  2676 00000DD4 E872560000              	call	CMOS_READ
  2677 00000DD9 A2[B8770100]            	mov	[time_seconds], al 
  2678 00000DDE B002                    	mov	al, CMOS_MINUTES
  2679 00000DE0 E866560000              	call	CMOS_READ
  2680 00000DE5 A2[B9770100]            	mov	[time_minutes], al 
  2681 00000DEA B004                    	mov	al, CMOS_HOURS
  2682 00000DEC E85A560000              	call	CMOS_READ
  2683 00000DF1 A2[BA770100]                    mov     [time_hours], al
  2684 00000DF6 B006                    	mov	al, CMOS_DAY_WEEK 
  2685 00000DF8 E84E560000              	call	CMOS_READ
  2686 00000DFD A2[BB770100]            	mov	[date_wday], al
  2687 00000E02 B007                     	mov	al, CMOS_DAY_MONTH
  2688 00000E04 E842560000              	call	CMOS_READ
  2689 00000E09 A2[BC770100]            	mov	[date_day], al
  2690 00000E0E B008                    	mov	al, CMOS_MONTH
  2691 00000E10 E836560000              	call	CMOS_READ
  2692 00000E15 A2[BD770100]            	mov	[date_month], al
  2693 00000E1A B009                    	mov	al, CMOS_YEAR
  2694 00000E1C E82A560000              	call	CMOS_READ
  2695 00000E21 A2[BE770100]            	mov	[date_year], al
  2696 00000E26 B032                    	mov	al, CMOS_CENTURY
  2697 00000E28 E81E560000              	call	CMOS_READ
  2698 00000E2D A2[BF770100]            	mov	[date_century], al
  2699                                  	;
  2700 00000E32 B000                    	mov	al, CMOS_SECONDS
  2701 00000E34 E812560000              	call 	CMOS_READ
  2702 00000E39 3A05[B8770100]          	cmp	al, [time_seconds]
  2703 00000E3F 758A                    	jne	short time_of_day
  2704                                  
  2705                                  time_of_day_retn:
  2706 00000E41 C3                      	retn
  2707                                  
  2708                                  	; 15/01/2017
  2709                                  	; 10/06/2016
  2710                                  	; 07/06/2016
  2711                                  	; 06/06/2016
  2712                                  	; 23/05/2016
  2713                                  rtc_p:
  2714 00000E42 B101                    	mov	cl, 1 ; 15/01/2017
  2715 00000E44 EB02                    	jmp	short rtc_p0
  2716                                  u_timer: 
  2717                                  	; Timer Events with 18.2 Hz Timer Ticks
  2718                                  	; (and also timer events with RTC seconds)
  2719 00000E46 28C9                    	sub	cl, cl ; mov cl, 0 ; 15/01/2017
  2720                                  rtc_p0:
  2721                                  	; 19/05/2016 - TRDOS 386 (TRDOS v2.0)
  2722                                  	; Major Modification:
  2723                                  	; Check and Perform Timer Events (for RTC)
  2724                                  	; 25/08/2014 - 07/09/2014
  2725                                  	; Retro UNIX 386 v1:
  2726                                   	; Print Real Time Clock content
  2727                                  	
  2728                                  	; 15/01/2017
  2729 00000E48 880D[D4830100]          	mov	byte [priority], cl ; 0 or 1 (not 2)
  2730 00000E4E 8A2D[D7830100]          	mov	ch, [timer_events]
  2731 00000E54 20ED                    	and	ch, ch
  2732 00000E56 7420                    	jz	short rtc_p3
  2733                                  
  2734 00000E58 BE[2C020300]            	mov	esi, timer_set  ; beginning address of
  2735                                  				; timer events space
  2736                                  rtc_p1:
  2737 00000E5D 8B06                    	mov	eax, [esi]	
  2738 00000E5F 20C0                    	and	al, al ; 0 = free, >0 = process no.
  2739 00000E61 7416                    	jz	short rtc_p4
  2740                                  	;
  2741 00000E63 C1C810                  	ror	eax, 16
  2742                                  	; ah = response value, al = interrupt type
  2743                                  	; 15/01/2017
  2744                                  	; cl = interrupt source
  2745                                  	;       1 = RTC, 0 = PIT  	 	
  2746 00000E66 38C8                    	cmp	al, cl 
  2747 00000E68 750A                    	jne	short rtc_p2 ; not as requested or undefined !
  2748 00000E6A 3C01                    	cmp	al, 1 ; 1 ; RTC interrupt ?
  2749 00000E6C 7410                    	je	short rtc_p5 ; yes, check for response
  2750                                  	; 06/06/2016 - 18.2 Hz Timer Ticks
  2751 00000E6E 836E080A                	sub	dword [esi+8], 10 ; 1 tick = 10
  2752 00000E72 7613                    	jna	short rtc_p6  ; continue for responding
  2753                                  rtc_p2:
  2754                                  	; 15/01/2017 (cl -> ch)
  2755                                  	; 07/06/2016
  2756 00000E74 FECD                    	dec	ch    ; remain count of timer events	
  2757 00000E76 7501                    	jnz	short rtc_p4
  2758                                  rtc_p3:	 
  2759 00000E78 C3                      	retn
  2760                                  rtc_p4:	
  2761                                  	;cmp	esi, timer_set + 240 ; 15*16 (last event)
  2762                                  	;jnb	short rtc_p3 ; end of timer event space
  2763 00000E79 83C610                  	add	esi, 16 ; next timer event
  2764 00000E7C EBDF                    	jmp	short rtc_p1
  2765                                  rtc_p5:	 
  2766                                  	; current timer count ; 06/06/2016 (182)
  2767 00000E7E 816E08B6000000          	sub	dword [esi+8], 182 ; 1 second (10*18.2)
  2768 00000E85 77ED                    	ja	short rtc_p2  ; check for the next 
  2769                                  rtc_p6:	
  2770                                  	; it is the time of response! 
  2771 00000E87 8B5E04                  	mov	ebx, [esi+4] ; set (count limit) value
  2772 00000E8A 895E08                  	mov	[esi+8], ebx ; reset count down value
  2773                                  			     ; to count limit
  2774                                  	; 19/12/2016
  2775                                  	; 10/12/2016 - timer callback modification
  2776 00000E8D 8B7E0C                  	mov	edi, [esi+12] ; response (or callback) address	
  2777 00000E90 807E0100                	cmp	byte [esi+1], 0 ; >0 = callback
  2778 00000E94 762A                    	jna	short rtc_p8
  2779                                  
  2780                                  	; timer callback !
  2781 00000E96 0FB61E                  	movzx	ebx, byte [esi] ; process number (>0)
  2782 00000E99 89D8                    	mov	eax, ebx
  2783 00000E9B C0E302                  	shl	bl, 2 ; *4
  2784 00000E9E 89BB[BC000300]          	mov	[ebx+p.tcb-4], edi ; user's callback service addr
  2785 00000EA4 3A05[6D010300]          	cmp	al, [u.uno]
  2786 00000EAA 7521                    	jne	short rtc_p9
  2787 00000EAC 893D[8C010300]          	mov	[u.tcb], edi
  2788                                  rtc_p7:
  2789                                  	; 15/01/2017
  2790 00000EB2 B002                    	mov	al, 2
  2791 00000EB4 A2[D4830100]            	mov	[priority], al ; 2
  2792                                  	; 10/01/2017
  2793                                  	;mov	byte [u.pri], 2
  2794 00000EB9 A2[66010300]            	mov	[u.pri], al ; 2
  2795 00000EBE EBB4                    	jmp	short rtc_p2
  2796                                  rtc_p8:
  2797                                  	; response address is physical address of
  2798                                  	; the program's response (signal return) byte
  2799                                  	; 06/06/2016
  2800                                  	;mov	edi, [esi+12] ; response address
  2801 00000EC0 8827                    	mov	[edi], ah     ; response value 
  2802                                  	;
  2803 00000EC2 C1C010                  	rol	eax, 16
  2804                                  	; 15/01/2017
  2805 00000EC5 3A05[6D010300]          	cmp	al, [u.uno] ; running process ?
  2806 00000ECB 74E5                    	je	short rtc_p7
  2807                                  rtc_p9:
  2808                                  	; al = process number  ; 10/06/2016
  2809 00000ECD B202                    	mov	dl, 2 ; priority, 2 = event (high)	
  2810 00000ECF E8D90F0100              	call	set_run_sequence ; 19/05/2016
  2811 00000ED4 EB9E                    	jmp	short rtc_p2 ; 10/06/2016
  2812                                  
  2813                                  ; Default IRQ 7 handler against spurious IRQs (from master PIC)
  2814                                  ; 25/02/2015 (source: http://wiki.osdev.org/8259_PIC)
  2815                                  default_irq7:
  2816                                  	;push	ax
  2817                                  	; 18/04/2021
  2818 00000ED6 50                      	push	eax
  2819 00000ED7 B00B                    	mov	al, 0Bh  ; In-Service register
  2820 00000ED9 E620                    	out	20h, al
  2821 00000EDB EB00                            jmp short $+2
  2822 00000EDD EB00                    	jmp short $+2
  2823 00000EDF E420                    	in	al, 20h
  2824 00000EE1 2480                    	and 	al, 80h ; bit 7 (is it real IRQ 7 or fake?)
  2825 00000EE3 7404                            jz      short irq7_iret ; Fake (spurious) IRQ, do not send EOI 
  2826 00000EE5 B020                            mov     al, 20h ; EOI
  2827 00000EE7 E620                    	out	20h, al 
  2828                                  irq7_iret:
  2829                                  	;pop	ax
  2830                                  	; 18/04/2021
  2831 00000EE9 58                      	pop	eax
  2832 00000EEA CF                      	iretd
  2833                                  	
  2834                                  bcd_to_ascii:
  2835                                  	; 25/08/2014
  2836                                  	; INPUT ->
  2837                                  	;	al = Packed BCD number
  2838                                  	; OUTPUT ->
  2839                                  	;	ax  = ASCII word/number
  2840                                  	;
  2841                                  	; Erdogan Tan - 1998 (proc_hex) - TRDOS.ASM (2004-2011)
  2842                                  	;
  2843 00000EEB D410                    	db	0D4h, 10h	; Undocumented inst. AAM
  2844                                  				; AH = AL / 10h
  2845                                  				; AL = AL MOD 10h
  2846 00000EED 660D3030                	or	ax, '00'	; Make it ASCII based
  2847                                  
  2848 00000EF1 86E0                            xchg	ah, al 
  2849                                  	
  2850 00000EF3 C3                      	retn
  2851                                  
  2852                                  ; 15/12/2020
  2853                                  real_mem_16m_64k: 
  2854 00000EF4 0000                    	dw	0	; Real size of system memory (if > 16MB)
  2855                                  			; as number of 64K blocks - 256
  2856                                  			; (This is for saving real system memory
  2857                                  			; because if system memory is larger than
  2858                                  			; 3 GB and if a VESA VBE video bios
  2859                                  			; is detected, 'mem_16m_64K' may be
  2860                                  			; decreased to reserve LFB space 
  2861                                  			; at the end of system memory.)
  2862                                  			; Upper memory space from LFB base address
  2863                                  			; to 4GB will not be included by M.A.T.
  2864                                  def_LFB_addr:	
  2865 00000EF6 0000                    	dw	0 	; HW of default LFB addr (for mode 118h)	
  2866                                  	
  2867                                  
  2868                                  %include 'keyboard.s' ; 07/03/2015
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel) - v2.0.5 - keyboard.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 07/08/2022 (Previous: 12/04/2021)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 17/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Turkish Rational DOS
    11                              <1> ; Operating System Project v2.0 by ERDOGAN TAN (Beginning: 04/01/2016)
    12                              <1> ;
    13                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    14                              <1> ; keyboard.inc (17/10/2015)
    15                              <1> ;
    16                              <1> ; Derived from 'IBM PC-XT-286' BIOS source code (1986) 
    17                              <1> ; ****************************************************************************
    18                              <1> 
    19                              <1> ; Ref: Retro UNIX 386 v1.2 - keyboard.s - 11/06/2022
    20                              <1> 
    21                              <1> ; Retro UNIX 386 v1 Kernel - KEYBOARD.INC
    22                              <1> ; Last Modification: 17/10/2015
    23                              <1> ;		    (Keyboard Data is in 'KYBDATA.INC')	
    24                              <1> ;
    25                              <1> ; ///////// KEYBOARD FUNCTIONS (PROCEDURES) ///////////////
    26                              <1> 
    27                              <1> ; 17/01/2016 (TRDOS 386 = TRDOS v2.0)
    28                              <1> 
    29                              <1> ; 03/12/2014
    30                              <1> ; 26/08/2014
    31                              <1> ; KEYBOARD I/O
    32                              <1> ; (INT_16h - Retro UNIX 8086 v1 - U9.ASM, 30/06/2014)
    33                              <1> 
    34                              <1> ;NOTE: 'k0' to 'k7' are name of OPMASK registers.
    35                              <1> ;	(The reason of using '_k' labels!!!) (27/08/2014)    
    36                              <1> ;NOTE: 'NOT' keyword is '~' unary operator in NASM.
    37                              <1> ;	('NOT LC_HC' --> '~LC_HC') (bit reversing operator)
    38                              <1> 
    39                              <1> int16h:	; 30/06/2015
    40                              <1> ;getc:
    41 00000EF8 9C                  <1> 	pushfd	; 28/08/2014
    42 00000EF9 0E                  <1> 	push 	cs
    43 00000EFA E826000000          <1> 	call 	KEYBOARD_IO_1 ; getc_int
    44 00000EFF C3                  <1> 	retn	
    45                              <1> 
    46                              <1> ; 24/07/2022 - TRDOS 386 v2.0.5
    47                              <1> 
    48                              <1> 	;-----	SHIFT STATUS
    49                              <1> _K3E:                                   ; GET THE EXTENDED SHIFT STATUS FLAGS
    50 00000F00 8A25[EA660000]      <1> 	mov	ah, [KB_FLAG_1]		; GET SYSTEM SHIFT KEY STATUS
    51 00000F06 80E404              <1> 	and	ah, SYS_SHIFT		; MASK ALL BUT SYS KEY BIT
    52                              <1> 	;mov	cl, 5			; SHIFT THEW SYSTEMKEY BIT OVER TO
    53                              <1> 	;shl	ah, cl			; BIT 7 POSITION
    54 00000F09 C0E405              <1>         shl	ah, 5
    55 00000F0C A0[EA660000]        <1> 	mov	al, [KB_FLAG_1]		; GET SYSTEM SHIFT STATES BACK
    56 00000F11 2473                <1> 	and	al, 01110011b		; ELIMINATE SYS SHIFT, HOLD_STATE AND INS_SHIFT
    57 00000F13 08C4                <1> 	or	ah, al                  ; MERGE REMAINING BITS INTO AH
    58 00000F15 A0[EC660000]        <1> 	mov	al, [KB_FLAG_3]		; GET RIGHT CTL AND ALT
    59 00000F1A 240C                <1> 	and	al, 00001100b		; ELIMINATE LC_E0 AND LC_E1
    60 00000F1C 08C4                <1> 	or	ah, al			; OR THE SHIFT FLAGS TOGETHER
    61                              <1> _K3:
    62 00000F1E A0[E9660000]        <1> 	mov	al, [KB_FLAG]		; GET THE SHIFT STATUS FLAGS
    63                              <1> 	; 24/07/2022
    64 00000F23 EB38                <1> 	jmp	short _KIO_EXIT		; RETURN TO CALLER
    65                              <1> 
    66                              <1> getc_int:
    67                              <1> 	; 28/02/2015
    68                              <1> 	; 03/12/2014 (derivation from pc-xt-286 bios source code -1986-, 
    69                              <1> 	;	      instead of pc-at bios - 1985-)
    70                              <1> 	; 28/08/2014 (_k1d)
    71                              <1> 	; 30/06/2014
    72                              <1> 	; 03/03/2014
    73                              <1> 	; 28/02/2014
    74                              <1> 	; Derived from "KEYBOARD_IO_1" procedure of IBM "pc-xt-286" 
    75                              <1> 	; rombios source code (21/04/1986)
    76                              <1> 	;	 'keybd.asm', INT 16H, KEYBOARD_IO
    77                              <1> 	;
    78                              <1> 	; KYBD --- 03/06/86  KEYBOARD BIOS
    79                              <1> 	;
    80                              <1> 	;--- INT 16 H -----------------------------------------------------------------
    81                              <1> 	; KEYBOARD I/O								      :
    82                              <1> 	;	THESE ROUTINES PROVIDE READ KEYBOARD SUPPORT			      :
    83                              <1> 	; INPUT									      :
    84                              <1> 	;	(AH)= 00H  READ THE NEXT ASCII CHARACTER ENTERED FROM THE KEYBOARD,   :
    85                              <1> 	;		   RETURN THE RESULT IN (AL), SCAN CODE IN (AH).              :
    86                              <1> 	;		   THIS IS THE COMPATIBLE READ INTERFACE, EQUIVALENT TO THE   :
    87                              <1> 	;                  STANDARD PC OR PCAT KEYBOARD				      :	
    88                              <1> 	;-----------------------------------------------------------------------------:
    89                              <1> 	;	(AH)= 01H  SET THE ZERO FLAG TO INDICATE IF AN ASCII CHARACTER IS     :
    90                              <1> 	;		   AVAILABLE TO BE READ FROM THE KEYBOARD BUFFER.	      :
    91                              <1> 	;		   (ZF)= 1 -- NO CODE AVAILABLE			              :
    92                              <1> 	;		   (ZF)= 0 -- CODE IS AVAILABLE  (AX)= CHARACTER              :
    93                              <1> 	;		   IF (ZF)= 0, THE NEXT CHARACTER IN THE BUFFER TO BE READ IS :
    94                              <1> 	;		   IN (AX), AND THE ENTRY REMAINS IN THE BUFFER.              :
    95                              <1> 	;		   THIS WILL RETURN ONLY PC/PCAT KEYBOARD COMPATIBLE CODES    :
    96                              <1> 	;-----------------------------------------------------------------------------:	
    97                              <1> 	;	(AH)= 02H  RETURN THE CURRENT SHIFT STATUS IN AL REGISTER             :
    98                              <1> 	;		   THE BIT SETTINGS FOR THIS CODE ARE INDICATED IN THE        :
    99                              <1> 	;		   EQUATES FOR @KB_FLAG		                              :
   100                              <1> 	;-----------------------------------------------------------------------------:	
   101                              <1> 	;	(AH)= 03H  SET TYPAMATIC RATE AND DELAY                               :
   102                              <1> 	;	      (AL) = 05H                                                      :
   103                              <1> 	;	      (BL) = TYPAMATIC RATE (BITS 5 - 7 MUST BE RESET TO 0)           :
   104                              <1> 	;		       							      :
   105                              <1> 	;                     REGISTER     RATE      REGISTER     RATE                :
   106                              <1> 	;                      VALUE     SELECTED     VALUE     SELECTED              :
   107                              <1> 	;                     --------------------------------------------            :
   108                              <1> 	;			00H        30.0        10H        7.5                 :
   109                              <1> 	;			01H        26.7        11H        6.7                 :
   110                              <1> 	;			02H        24.0        12H        6.0                 :
   111                              <1> 	;			03H        21.8        13H        5.5                 :
   112                              <1> 	;			04H        20.0        14H        5.0                 :
   113                              <1> 	;			05H        18.5        15H        4.6                 :
   114                              <1> 	;			06H        17.1        16H        4.3                 :
   115                              <1> 	;			07H        16.0        17H        4.0                 :
   116                              <1> 	;			08H        15.0        18H        3.7                 :
   117                              <1> 	;			09H        13.3        19H        3.3                 :
   118                              <1> 	;			0AH        12.0        1AH        3.0                 :
   119                              <1> 	;			0BH        10.9        1BH        2.7                 :
   120                              <1>         ;			0CH        10.0        1CH        2.5                 :
   121                              <1> 	;			0DH         9.2        1DH        2.3                 :
   122                              <1> 	;			0EH         8.6        1EH        2.1                 :
   123                              <1> 	;			0FH         8.0        1FH        2.0                 :
   124                              <1> 	;									      :
   125                              <1> 	;	      (BH) = TYPAMATIC DELAY  (BITS 2 - 7 MUST BE RESET TO 0)         :
   126                              <1> 	;		       							      :
   127                              <1> 	;                     REGISTER     DELAY                                      :
   128                              <1> 	;                      VALUE       VALUE                                      :
   129                              <1> 	;                     ------------------                                      :
   130                              <1> 	;			00H        250 ms                                     :
   131                              <1> 	;			01H        500 ms                                     :
   132                              <1> 	;			02H        750 ms                                     :
   133                              <1> 	;			03H       1000 ms                                     :
   134                              <1> 	;-----------------------------------------------------------------------------:
   135                              <1> 	;	(AH)= 05H  PLACE ASCII CHARACTER/SCAN CODE COMBINATION IN KEYBOARD    :
   136                              <1> 	;		   BUFFER AS IF STRUCK FROM KEYBOARD                          :
   137                              <1> 	;		   ENTRY:  (CL) = ASCII CHARACTER		              :
   138                              <1> 	;		           (CH) = SCAN CODE                                   :
   139                              <1> 	;		   EXIT:   (AH) = 00H = SUCCESSFUL OPERATION                  :
   140                              <1> 	;		           (AL) = 01H = UNSUCCESSFUL - BUFFER FULL            :
   141                              <1> 	;		   FLAGS:  CARRY IF ERROR                                     :
   142                              <1> 	;-----------------------------------------------------------------------------:		
   143                              <1> 	;	(AH)= 10H  EXTENDED READ INTERFACE FOR THE ENHANCED KEYBOARD,         :
   144                              <1> 	;		   OTHERWISE SAME AS FUNCTION AH=0                            :
   145                              <1> 	;-----------------------------------------------------------------------------:
   146                              <1> 	;	(AH)= 11H  EXTENDED ASCII STATUS FOR THE ENHANCED KEYBOARD,           :
   147                              <1> 	;		   OTHERWISE SAME AS FUNCTION AH=1                            :
   148                              <1> 	;-----------------------------------------------------------------------------:	
   149                              <1> 	;	(AH)= 12H  RETURN THE EXTENDED SHIFT STATUS IN AX REGISTER            :
   150                              <1> 	;		   AL = BITS FROM KB_FLAG, AH = BITS FOR LEFT AND RIGHT       :
   151                              <1> 	;		   CTL AND ALT KEYS FROM KB_FLAG_1 AND KB_FLAG_3              :
   152                              <1> 	; OUTPUT					                              :
   153                              <1> 	;	AS NOTED ABOVE, ONLY (AX) AND FLAGS CHANGED	                      :
   154                              <1> 	;	ALL REGISTERS RETAINED		                                      :
   155                              <1> 	;------------------------------------------------------------------------------
   156                              <1> 
   157                              <1> ; 07/08/2022
   158                              <1> ; 24/07/2022 - TRDOS 386 v2.0.5
   159                              <1> ; 12/04/2021 - TRDOS 386 v2.0.3 (32 bit push/pop)
   160                              <1> ; 15/01/2017
   161                              <1> ; 14/01/2017
   162                              <1> ; 02/01/2017
   163                              <1> ; 29/05/2016
   164                              <1> ; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
   165                              <1> int32h:  ; Keyboard BIOS
   166                              <1> 
   167                              <1> KEYBOARD_IO_1:	
   168                              <1> 	;sti				; INTERRUPTS BACK ON
   169                              <1> 	; 29/05/2016
   170 00000F25 80642408BE          <1>         and     byte [esp+8], 10111110b ; clear zero flag and cary flag
   171                              <1> 	;
   172 00000F2A 1E                  <1> 	push	ds			; SAVE CURRENT DS
   173 00000F2B 53                  <1> 	push	ebx			; SAVE BX TEMPORARILY
   174                              <1> 	;push	ecx			; SAVE CX TEMPORARILY
   175 00000F2C 66BB1000            <1>         mov     bx, KDATA
   176 00000F30 8EDB                <1> 	mov	ds, bx			; PUT SEGMENT VALUE OF DATA AREA INTO DS
   177                              <1> 	; 14/01/2017
   178 00000F32 8B1C24              <1> 	mov	ebx, [esp]
   179                              <1> 	;; 15/01/2017
   180                              <1> 	; 02/01/2017
   181                              <1> 	;;mov	byte [intflg], 32h	; keyboard interrupt 
   182 00000F35 FB                  <1> 	sti
   183                              <1> 	;
   184 00000F36 08E4                <1> 	or	ah, ah			; CHECK FOR (AH)= 00H
   185 00000F38 7433                <1> 	jz	short _K1		; ASCII_READ
   186 00000F3A FECC                <1> 	dec	ah                      ; CHECK FOR (AH)= 01H
   187 00000F3C 744C                <1>         jz      short _K2               ; ASCII_STATUS
   188 00000F3E FECC                <1> 	dec	ah			; CHECK FOR (AH)= 02H
   189 00000F40 74DC                <1>         jz	short _K3		; SHIFT STATUS
   190 00000F42 FECC                <1> 	dec	ah			; CHECK FOR (AH)= 03H	
   191 00000F44 746F                <1>         jz      short _K300		; SET TYPAMATIC RATE/DELAY
   192 00000F46 80EC02              <1> 	sub	ah, 2			; CHECK FOR (AH)= 05H	
   193                              <1>         ;jz	short _K500		; KEYBOARD WRITE
   194                              <1> 	; 07/08/2022
   195 00000F49 7505                <1> 	jnz	short _KIO1
   196 00000F4B E988000000          <1> 	jmp	_K500         
   197                              <1> _KIO1:	
   198 00000F50 80EC0B              <1> 	sub	ah, 11			; AH =  10H
   199 00000F53 740C                <1> 	jz	short _K1E		; EXTENDED ASCII READ
   200 00000F55 FECC                <1> 	dec	ah			; CHECK FOR (AH)= 11H
   201 00000F57 7422                <1> 	jz	short _K2E		; EXTENDED_ASCII_STATUS
   202 00000F59 FECC                <1> 	dec	ah			; CHECK FOR (AH)= 12H
   203 00000F5B 74A3                <1> 	jz	short _K3E		; EXTENDED_SHIFT_STATUS
   204                              <1> _KIO_EXIT:
   205                              <1> 	; 02/01/2017
   206 00000F5D FA                  <1> 	cli
   207                              <1> 	;;mov	byte [intflg], 0 ;; 15/01/2017
   208                              <1> 	;
   209                              <1> 	;pop	ecx			; RECOVER REGISTER
   210 00000F5E 5B                  <1> 	pop	ebx			; RECOVER REGISTER
   211 00000F5F 1F                  <1> 	pop	ds			; RECOVER SEGMENT
   212 00000F60 CF                  <1> 	iretd				; INVALID COMMAND, EXIT
   213                              <1> 
   214                              <1> ; 24/07/2022
   215                              <1> ;
   216                              <1> ;	;-----	SHIFT STATUS
   217                              <1> ;_K3E:					; GET THE EXTENDED SHIFT STATUS FLAGS
   218                              <1> ;	mov	ah, [KB_FLAG_1]		; GET SYSTEM SHIFT KEY STATUS
   219                              <1> ;	and	ah, SYS_SHIFT		; MASK ALL BUT SYS KEY BIT
   220                              <1> ;	;mov	cl, 5			; SHIFT THEW SYSTEMKEY BIT OVER TO
   221                              <1> ;	;shl	ah, cl			; BIT 7 POSITION
   222                              <1> ;       shl	ah, 5
   223                              <1> ;	mov	al, [KB_FLAG_1]		; GET SYSTEM SHIFT STATES BACK
   224                              <1> ;	and	al, 01110011b		; ELIMINATE SYS SHIFT, HOLD_STATE AND INS_SHIFT
   225                              <1> ;	or	ah, al                  ; MERGE REMAINING BITS INTO AH
   226                              <1> ;	mov	al, [KB_FLAG_3]		; GET RIGHT CTL AND ALT
   227                              <1> ;	and	al, 00001100b		; ELIMINATE LC_E0 AND LC_E1
   228                              <1> ;	or	ah, al			; OR THE SHIFT FLAGS TOGETHER
   229                              <1> ;_K3:
   230                              <1> ;	mov	al, [KB_FLAG]		; GET THE SHIFT STATUS FLAGS
   231                              <1> ;	; 24/07/2022
   232                              <1> ;	jmp	short _KIO_EXIT		; RETURN TO CALLER
   233                              <1> 
   234                              <1> 	;-----	ASCII CHARACTER
   235                              <1> _K1E:	
   236 00000F61 E89F000000          <1> 	call	_K1S			; GET A CHARACTER FROM THE BUFFER (EXTENDED)
   237 00000F66 E812010000          <1> 	call	_KIO_E_XLAT		; ROUTINE TO XLATE FOR EXTENDED CALLS
   238 00000F6B EBF0                <1> 	jmp	short _KIO_EXIT         ; GIVE IT TO THE CALLER
   239                              <1> _K1:	
   240 00000F6D E893000000          <1> 	call	_K1S			; GET A CHARACTER FROM THE BUFFER
   241 00000F72 E811010000          <1> 	call	_KIO_S_XLAT		; ROUTINE TO XLATE FOR STANDARD CALLS
   242 00000F77 72F4                <1> 	jc	short _K1		; CARRY SET MEANS TROW CODE AWAY
   243                              <1> _K1A:
   244 00000F79 EBE2                <1> 	jmp	short _KIO_EXIT         ; RETURN TO CALLER
   245                              <1> 
   246                              <1> 	;-----	ASCII STATUS
   247                              <1> _K2E:	
   248 00000F7B E8D0000000          <1> 	call	_K2S			; TEST FOR CHARACTER IN BUFFER (EXTENDED)
   249 00000F80 7420                <1> 	jz	short _K2B		; RETURN IF BUFFER EMPTY
   250 00000F82 9C                  <1> 	pushf				; SAVE ZF FROM TEST
   251 00000F83 E8F5000000          <1> 	call	_KIO_E_XLAT		; ROUTINE TO XLATE FOR EXTENDED CALLS
   252 00000F88 EB17                <1> 	jmp	short _K2A	        ; GIVE IT TO THE CALLER
   253                              <1> _K2:	
   254 00000F8A E8C1000000          <1> 	call	_K2S			; TEST FOR CHARACTER IN BUFFER
   255 00000F8F 7411                <1> 	jz	short _K2B		; RETURN IF BUFFER EMPTY
   256 00000F91 9C                  <1> 	pushf				; SAVE ZF FROM TEST
   257 00000F92 E8F1000000          <1> 	call	_KIO_S_XLAT		; ROUTINE TO XLATE FOR STANDARD CALLS
   258 00000F97 7308                <1> 	jnc	short _K2A	        ; CARRY CLEAR MEANS PASS VALID CODE
   259 00000F99 9D                  <1> 	popf				; INVALID CODE FOR THIS TYPE OF CALL
   260 00000F9A E866000000          <1> 	call	_K1S			; THROW THE CHARACTER AWAY
   261 00000F9F EBE9                <1> 	jmp	short _K2		; GO LOOK FOR NEXT CHAR, IF ANY
   262                              <1> _K2A:
   263 00000FA1 9D                  <1> 	popf				; RESTORE ZF FROM TEST
   264                              <1> _K2B:
   265                              <1> 	; 02/01/2017
   266 00000FA2 FA                  <1> 	cli
   267                              <1> 	;; mov	byte [intflg], 0 ;; 15/01/2017
   268                              <1> 	;
   269                              <1> 	;pop	ecx			; RECOVER REGISTER
   270 00000FA3 5B                  <1> 	pop	ebx			; RECOVER REGISTER
   271 00000FA4 1F                  <1> 	pop	ds			; RECOVER SEGMENT
   272                              <1> 	; (*) 29/05/2016
   273                              <1> 	; (*) retf 4			; THROW AWAY (e)FLAGS
   274 00000FA5 7208                <1> 	jc	short _k2d
   275 00000FA7 7505                <1> 	jnz	short _k2c
   276 00000FA9 804C240840          <1> 	or	byte [esp+8], 01000000b	; set zero flag bit of eflags register
   277                              <1> _k2c:
   278 00000FAE CF                  <1> 	iretd
   279                              <1> _k2d:
   280                              <1> 	; 29/05/2016 -set carry flag on stack-
   281                              <1> 	; [esp] = EIP
   282                              <1> 	; [esp+4] = CS
   283                              <1> 	; [esp+8] = E-FLAGS
   284 00000FAF 804C240801          <1> 	or	byte [esp+8], 1  ; set carry bit of eflags register
   285                              <1> 	; [esp+12] = ESP (user)
   286                              <1> 	; [esp+16] = SS (User)
   287 00000FB4 CF                  <1> 	iretd
   288                              <1> 	
   289                              <1> 	; (*) 29/05/2016 - 'retf 4' intruction causes to stack fault
   290                              <1> 	; (OUTER-PRIVILEGE-LEVEL)
   291                              <1> 	; INTEL 80386 PROGRAMMER'S REFERENCE MANUAL 1986
   292                              <1> 	; // RETF instruction:
   293                              <1> 	;
   294                              <1> 	; IF OperandMode=32 THEN
   295                              <1>  	;    Load CS:EIP from stack;
   296                              <1>  	;    Set CS RPL to CPL;
   297                              <1>  	;    Increment ESP by 8 plus the immediate offset if it exists;
   298                              <1>  	;    Load SS:ESP from stack;
   299                              <1>  	; ELSE (* OperandMode=16 *)
   300                              <1>  	;    Load CS:IP from stack;
   301                              <1>  	;    Set CS RPL to CPL;
   302                              <1>  	;    Increment SP by 4 plus the immediate offset if it exists;
   303                              <1> 	;    Load SS:SP from stack;
   304                              <1>  	; FI;
   305                              <1> 	;
   306                              <1> 	; //
   307                              <1> 
   308                              <1> 	; 24/07/2022
   309                              <1> 	;-----	SET TYPAMATIC RATE AND DELAY
   310                              <1> _K300:
   311 00000FB5 3C05                <1> 	cmp	al, 5			; CORRECT FUNCTION CALL?
   312 00000FB7 75A4                <1> 	jne	short _KIO_EXIT		; NO, RETURN
   313 00000FB9 F6C3E0              <1> 	test	bl, 0E0h		; TEST FOR OUT-OF-RANGE RATE
   314 00000FBC 759F                <1> 	jnz	short _KIO_EXIT		; RETURN IF SO
   315 00000FBE F6C7FC              <1> 	test	bh, 0FCh		; TEST FOR OUT-OF-RANGE DELAY
   316 00000FC1 759A                <1> 	jnz	short _KIO_EXIT		; RETURN IF SO
   317 00000FC3 B0F3                <1> 	mov	al, KB_TYPA_RD		; COMMAND FOR TYPAMATIC RATE/DELAY		
   318 00000FC5 E875060000          <1> 	call	SND_DATA		; SEND TO KEYBOARD	
   319                              <1> 	;mov	cx, 5			; SHIFT COUNT
   320                              <1> 	;shl	bh, cl			; SHIFT DELAY OVER
   321 00000FCA C0E705              <1> 	shl	bh, 5
   322 00000FCD 88D8                <1> 	mov	al, bl			; PUT IN RATE
   323 00000FCF 08F8                <1> 	or	al, bh			; AND DELAY
   324 00000FD1 E869060000          <1> 	call	SND_DATA		; SEND TO KEYBOARD	
   325 00000FD6 EB85                <1>         jmp     _KIO_EXIT               ; RETURN TO CALLER
   326                              <1> 
   327                              <1> 	;-----	WRITE TO KEYBOARD BUFFER
   328                              <1> _K500:
   329 00000FD8 56                  <1> 	push	esi			; SAVE SI (esi)
   330 00000FD9 FA                  <1> 	cli				; 
   331 00000FDA 8B1D[FA660000]      <1>      	mov	ebx, [BUFFER_TAIL]	; GET THE 'IN TO' POINTER TO THE BUFFER
   332 00000FE0 89DE                <1> 	mov	esi, ebx		; SAVE A COPY IN CASE BUFFER NOT FULL
   333 00000FE2 E8D1000000          <1> 	call	_K4			; BUMP THE POINTER TO SEE IF BUFFER IS FULL
   334 00000FE7 3B1D[F6660000]      <1> 	cmp	ebx, [BUFFER_HEAD]	; WILL THE BUFFER OVERRUN IF WE STORE THIS?
   335 00000FED 740D                <1> 	je	short _K502		; YES - INFORM CALLER OF ERROR		
   336 00000FEF 66890E              <1> 	mov	[esi], cx		; NO - PUT ASCII/SCAN CODE INTO BUFFER	
   337 00000FF2 891D[FA660000]      <1> 	mov	[BUFFER_TAIL], ebx	; ADJUST 'IN TO' POINTER TO REFLECT CHANGE
   338 00000FF8 28C0                <1> 	sub	al, al			; TELL CALLER THAT OPERATION WAS SUCCESSFUL
   339 00000FFA EB02                <1> 	jmp	short _K504		; SUB INSTRUCTION ALSO RESETS CARRY FLAG
   340                              <1> _K502:
   341 00000FFC B001                <1> 	mov	al, 01h			; BUFFER FULL INDICATION
   342                              <1> _K504:
   343 00000FFE FB                  <1> 	sti				
   344 00000FFF 5E                  <1> 	pop	esi			; RECOVER SI (esi)
   345 00001000 E958FFFFFF          <1>         jmp     _KIO_EXIT               ; RETURN TO CALLER WITH STATUS IN AL
   346                              <1> 
   347                              <1> 	;-----	READ THE KEY TO FIGURE OUT WHAT TO DO -----
   348                              <1> _K1S:
   349 00001005 FA                  <1> 	cli	; 03/12/2014
   350 00001006 8B1D[F6660000]      <1>         mov     ebx, [BUFFER_HEAD] 	; GET POINTER TO HEAD OF BUFFER
   351 0000100C 3B1D[FA660000]      <1>         cmp     ebx, [BUFFER_TAIL] 	; TEST END OF BUFFER
   352                              <1> 	;jne	short _K1U		; IF ANYTHING IN BUFFER SKIP INTERRUPT
   353 00001012 750F                <1> 	jne	short _k1x ; 03/12/2014
   354                              <1> 	;
   355                              <1> 	; 03/12/2014
   356                              <1> 	; 28/08/2014
   357                              <1> 	; PERFORM OTHER FUNCTION ?? here !
   358                              <1> 	;; MOV	AX, 9002h		; MOVE IN WAIT CODE & TYPE
   359                              <1> 	;; INT 	15H			; PERFORM OTHER FUNCTION
   360                              <1> _K1T:                                   ; ASCII READ
   361 00001014 FB                  <1> 	sti				; INTERRUPTS BACK ON DURING LOOP
   362 00001015 90                  <1> 	nop				; ALLOW AN INTERRUPT TO OCCUR
   363                              <1> _K1U:	
   364 00001016 FA                  <1> 	cli				; INTERRUPTS BACK OFF
   365 00001017 8B1D[F6660000]      <1>         mov    	ebx, [BUFFER_HEAD] 	; GET POINTER TO HEAD OF BUFFER
   366 0000101D 3B1D[FA660000]      <1>         cmp     ebx, [BUFFER_TAIL] 	; TEST END OF BUFFER
   367                              <1> _k1x:
   368 00001023 53                  <1> 	push	ebx			; SAVE ADDRESS		
   369 00001024 9C                  <1> 	pushf				; SAVE FLAGS
   370 00001025 E8C9060000          <1> 	call	MAKE_LED		; GO GET MODE INDICATOR DATA BYTE
   371 0000102A 8A1D[EB660000]      <1> 	mov	bl, [KB_FLAG_2] 	; GET PREVIOUS BITS
   372 00001030 30C3                <1> 	xor	bl, al			; SEE IF ANY DIFFERENT
   373 00001032 80E307              <1> 	and	bl, 07h	; KB_LEDS	; ISOLATE INDICATOR BITS
   374 00001035 7406                <1> 	jz	short _K1V		; IF NO CHANGE BYPASS UPDATE
   375 00001037 E863060000          <1> 	call	SND_LED1
   376 0000103C FA                  <1> 	cli				; DISABLE INTERRUPTS
   377                              <1> _K1V:
   378 0000103D 9D                  <1> 	popf				; RESTORE FLAGS
   379 0000103E 5B                  <1> 	pop	ebx			; RESTORE ADDRESS
   380 0000103F 74D3                <1>         je      short _K1T              ; LOOP UNTIL SOMETHING IN BUFFER
   381                              <1> 	;
   382 00001041 668B03              <1> 	mov	ax, [ebx] 		; GET SCAN CODE AND ASCII CODE
   383 00001044 E86F000000          <1>         call    _K4                     ; MOVE POINTER TO NEXT POSITION
   384 00001049 891D[F6660000]      <1>         mov     [BUFFER_HEAD], ebx      ; STORE VALUE IN VARIABLE
   385 0000104F C3                  <1> 	retn				; RETURN
   386                              <1> 
   387                              <1> 	;-----	READ THE KEY TO SEE IF ONE IS PRESENT -----
   388                              <1> _K2S:
   389 00001050 FA                  <1> 	cli				; INTERRUPTS OFF
   390 00001051 8B1D[F6660000]      <1>         mov     ebx, [BUFFER_HEAD]      ; GET HEAD POINTER
   391 00001057 3B1D[FA660000]      <1>         cmp     ebx, [BUFFER_TAIL]      ; IF EQUAL (Z=1) THEN NOTHING THERE
   392 0000105D 668B03              <1> 	mov	ax, [ebx]
   393 00001060 9C                  <1> 	pushf				; SAVE FLAGS
   394                              <1> 	;push	ax			; SAVE CODE
   395                              <1> 	; 12/04/2021
   396 00001061 50                  <1> 	push	eax
   397 00001062 E88C060000          <1> 	call	MAKE_LED		; GO GET MODE INDICATOR DATA BYTE
   398 00001067 8A1D[EB660000]      <1> 	mov	bl, [KB_FLAG_2] 	; GET PREVIOUS BITS
   399 0000106D 30C3                <1> 	xor	bl, al			; SEE IF ANY DIFFERENT
   400 0000106F 80E307              <1> 	and	bl, 07h ; KB_LEDS	; ISOLATE INDICATOR BITS
   401 00001072 7405                <1> 	jz	short _K2T		; IF NO CHANGE BYPASS UPDATE
   402 00001074 E80F060000          <1> 	call	SND_LED			; GO TURN ON MODE INDICATORS
   403                              <1> _K2T:
   404                              <1> 	;pop	ax			; RESTORE CODE
   405                              <1> 	; 12/04/2021
   406 00001079 58                  <1> 	pop	eax
   407 0000107A 9D                  <1> 	popf				; RESTORE FLAGS
   408 0000107B FB                  <1> 	sti				; INTERRUPTS BACK ON
   409 0000107C C3                  <1> 	retn				; RETURN
   410                              <1> 
   411                              <1> 	;-----	ROUTINE TO TRANSLATE SCAN CODE PAIRS FOR EXTENDED CALLS -----
   412                              <1> _KIO_E_XLAT:
   413 0000107D 3CF0                <1> 	cmp	al, 0F0h		; IS IT ONE OF THE FILL-INs?
   414 0000107F 7506                <1> 	jne	short _KIO_E_RET	; NO, PASS IT ON
   415 00001081 08E4                <1>         or 	ah, ah			; AH = 0 IS SPECIAL CASE
   416 00001083 7402                <1>         jz	short _KIO_E_RET        ; PASS THIS ON UNCHANGED
   417 00001085 30C0                <1> 	xor	al, al			; OTHERWISE SET AL = 0
   418                              <1> _KIO_E_RET:				
   419 00001087 C3                  <1> 	retn				; GO BACK
   420                              <1> 
   421                              <1> 	;-----	ROUTINE TO TRANSLATE SCAN CODE PAIRS FOR STANDARD CALLS -----
   422                              <1> _KIO_S_XLAT:
   423 00001088 80FCE0              <1> 	cmp	ah, 0E0h		; IS IT KEYPAD ENTER OR / ?
   424 0000108B 750F                <1> 	jne	short _KIO_S2		; NO, CONTINUE
   425 0000108D 3C0D                <1> 	cmp	al, 0Dh			; KEYPAD ENTER CODE?
   426 0000108F 7408                <1>         je	short _KIO_S1		; YES, MASSAGE A BIT
   427 00001091 3C0A                <1> 	cmp	al, 0Ah			; CTRL KEYPAD ENTER CODE?
   428 00001093 7404                <1>         je	short _KIO_S1		; YES, MASSAGE THE SAME
   429 00001095 B435                <1> 	mov	ah, 35h			; NO, MUST BE KEYPAD /
   430                              <1> _kio_ret: ; 03/12/2014
   431 00001097 F8                  <1> 	clc
   432 00001098 C3                  <1> 	retn
   433                              <1> 	;jmp	short _KIO_USE		; GIVE TO CALLER
   434                              <1> _KIO_S1:				
   435 00001099 B41C                <1> 	mov	ah, 1Ch			; CONVERT TO COMPATIBLE OUTPUT
   436                              <1> 	;jmp	short _KIO_USE		; GIVE TO CALLER
   437 0000109B C3                  <1> 	retn
   438                              <1> _KIO_S2:		
   439 0000109C 80FC84              <1> 	cmp	ah, 84h			; IS IT ONE OF EXTENDED ONES?
   440 0000109F 7715                <1> 	ja	short _KIO_DIS		; YES, THROW AWAY AND GET ANOTHER CHAR
   441 000010A1 3CF0                <1> 	cmp	al, 0F0h		; IS IT ONE OF THE FILL-INs?
   442 000010A3 7506                <1>         jne	short _KIO_S3		; NO, TRY LAST TEST
   443 000010A5 08E4                <1> 	or	ah, ah			; AH = 0 IS SPECIAL CASE
   444 000010A7 740C                <1>         jz	short _KIO_USE		; PASS THIS ON UNCHANGED
   445 000010A9 EB0B                <1> 	jmp	short _KIO_DIS		; THROW AWAY THE REST
   446                              <1> _KIO_S3:
   447 000010AB 3CE0                <1> 	cmp	al, 0E0h		; IS IT AN EXTENSION OF A PREVIOUS ONE?
   448                              <1> 	;jne	short _KIO_USE		; NO, MUST BE A STANDARD CODE
   449 000010AD 75E8                <1> 	jne	short _kio_ret
   450 000010AF 08E4                <1> 	or	ah, ah			; AH = 0 IS SPECIAL CASE
   451 000010B1 7402                <1>         jz	short _KIO_USE		; JUMP IF AH = 0
   452 000010B3 30C0                <1> 	xor	al, al			; CONVERT TO COMPATIBLE OUTPUT
   453                              <1> 	;jmp	short _KIO_USE		; PASS IT ON TO CALLER
   454                              <1> _KIO_USE:
   455                              <1> 	;clc				; CLEAR CARRY TO INDICATE GOOD CODE
   456 000010B5 C3                  <1> 	retn				; RETURN	
   457                              <1> _KIO_DIS:
   458 000010B6 F9                  <1> 	stc				; SET CARRY TO INDICATE DISCARD CODE
   459 000010B7 C3                  <1> 	retn				; RETURN
   460                              <1> 
   461                              <1> 	;-----	INCREMENT BUFFER POINTER ROUTINE -----
   462                              <1> _K4:    
   463 000010B8 43                  <1> 	inc     ebx
   464 000010B9 43                  <1> 	inc	ebx			; MOVE TO NEXT WORD IN LIST
   465 000010BA 3B1D[F2660000]      <1>         cmp     ebx, [BUFFER_END] 	; AT END OF BUFFER?
   466                              <1>         ;jne    short _K5               ; NO, CONTINUE
   467 000010C0 7206                <1> 	jb	short _K5
   468 000010C2 8B1D[EE660000]      <1>         mov     ebx, [BUFFER_START]     ; YES, RESET TO BUFFER BEGINNING
   469                              <1> _K5:
   470 000010C8 C3                  <1> 	retn
   471                              <1> 
   472                              <1> ; 20/02/2015
   473                              <1> ; 05/12/2014
   474                              <1> ; 26/08/2014
   475                              <1> ; KEYBOARD (HARDWARE) INTERRUPT -  IRQ LEVEL 1
   476                              <1> ; (INT_09h - Retro UNIX 8086 v1 - U9.ASM, 07/03/2014)
   477                              <1> ;
   478                              <1> ; Derived from "KB_INT_1" procedure of IBM "pc-at" 
   479                              <1> ; rombios source code (06/10/1985)
   480                              <1> ; 'keybd.asm', HARDWARE INT 09h - (IRQ Level 1)
   481                              <1> 
   482                              <1> ; EQUATES (IBM PC-XT-286 BIOS, 1986, 'POSQEQU.INC')
   483                              <1> 
   484                              <1> ;--------- 8042 COMMANDS -------------------------------------------------------
   485                              <1> ENA_KBD		equ	0AEh		; ENABLE KEYBOARD COMMAND
   486                              <1> DIS_KBD		equ	0ADh		; DISABLE KEYBOARD COMMAND
   487                              <1> SHUT_CMD	equ	0FEh		; CAUSE A SHUTDOWN COMMAND
   488                              <1> ;--------- 8042 KEYBOARD INTERFACE AND DIAGNOSTIC CONTROL REGISTERS ------------
   489                              <1> STATUS_PORT	equ	064h		; 8042 STATUS PORT
   490                              <1> INPT_BUF_FULL	equ	00000010b 	; 1 = +INPUT BUFFER FULL
   491                              <1> PORT_A		equ	060h		; 8042 KEYBOARD SCAN CODE/CONTROL PORT
   492                              <1> ;---------- 8042 KEYBOARD RESPONSE ---------------------------------------------
   493                              <1> KB_ACK		equ	0FAh		; ACKNOWLEDGE PROM TRANSMISSION
   494                              <1> KB_RESEND	equ	0FEh		; RESEND REQUEST
   495                              <1> KB_OVER_RUN	equ	0FFh		; OVER RUN SCAN CODE
   496                              <1> ;---------- KEYBOARD/LED COMMANDS ----------------------------------------------
   497                              <1> KB_ENABLE	equ	0F4h		; KEYBOARD ENABLE
   498                              <1> LED_CMD		equ	0EDh		; LED WRITE COMMAND
   499                              <1> KB_TYPA_RD	equ	0F3h		; TYPAMATIC RATE/DELAY COMMAND
   500                              <1> ;---------- KEYBOARD SCAN CODES ------------------------------------------------
   501                              <1> NUM_KEY		equ	69		; SCAN CODE FOR	 NUMBER LOCK KEY
   502                              <1> SCROLL_KEY	equ	70		; SCAN CODE FOR	 SCROLL LOCK KEY
   503                              <1> ALT_KEY		equ	56		; SCAN CODE FOR	 ALTERNATE SHIFT KEY
   504                              <1> CTL_KEY		equ	29		; SCAN CODE FOR	 CONTROL KEY
   505                              <1> CAPS_KEY	equ	58		; SCAN CODE FOR	 SHIFT LOCK KEY
   506                              <1> DEL_KEY		equ	83		; SCAN CODE FOR	 DELETE KEY
   507                              <1> INS_KEY		equ	82		; SCAN CODE FOR	 INSERT KEY
   508                              <1> LEFT_KEY	equ	42		; SCAN CODE FOR	 LEFT SHIFT
   509                              <1> RIGHT_KEY	equ	54		; SCAN CODE FOR	 RIGHT SHIFT
   510                              <1> SYS_KEY		equ	84		; SCAN CODE FOR	 SYSTEM KEY
   511                              <1> ;---------- ENHANCED KEYBOARD SCAN CODES ---------------------------------------
   512                              <1> ID_1		equ	0ABh		; 1ST ID CHARACTER FOR KBX
   513                              <1> ID_2		equ	041h		; 2ND ID CHARACTER FOR KBX
   514                              <1> ID_2A		equ	054h		; ALTERNATE 2ND ID CHARACTER FOR KBX
   515                              <1> F11_M		equ	87		; F11 KEY MAKE
   516                              <1> F12_M		equ	88		; F12 KEY MAKE
   517                              <1> MC_E0		equ	224		; GENERAL MARKER CODE
   518                              <1> MC_E1		equ	225		; PAUSE KEY MARKER CODE
   519                              <1> ;---------- FLAG EQUATES WITHIN @KB_FLAG----------------------------------------
   520                              <1> RIGHT_SHIFT	equ	00000001b	; RIGHT SHIFT KEY DEPRESSED
   521                              <1> LEFT_SHIFT	equ	00000010b	; LEFT SHIFT KEY DEPRESSED
   522                              <1> CTL_SHIFT	equ	00000100b	; CONTROL SHIFT KEY DEPRESSED
   523                              <1> ALT_SHIFT	equ	00001000b	; ALTERNATE SHIFT KEY DEPRESSED
   524                              <1> SCROLL_STATE	equ	00010000b	; SCROLL LOCK STATE IS ACTIVE
   525                              <1> NUM_STATE	equ	00100000b	; NUM LOCK STATE IS ACTIVE
   526                              <1> CAPS_STATE	equ	01000000b	; CAPS LOCK STATE IS ACTIVE
   527                              <1> INS_STATE	equ	10000000b	; INSERT STATE IS ACTIVE
   528                              <1> ;---------- FLAG EQUATES WITHIN	@KB_FLAG_1 -------------------------------------
   529                              <1> L_CTL_SHIFT	equ	00000001b	; LEFT CTL KEY DOWN
   530                              <1> L_ALT_SHIFT	equ	00000010b	; LEFT ALT KEY DOWN
   531                              <1> SYS_SHIFT	equ	00000100b	; SYSTEM KEY DEPRESSED AND HELD
   532                              <1> HOLD_STATE	equ	00001000b	; SUSPEND KEY HAS BEEN TOGGLED
   533                              <1> SCROLL_SHIFT	equ	00010000b	; SCROLL LOCK KEY IS DEPRESSED
   534                              <1> NUM_SHIFT	equ	00100000b	; NUM LOCK KEY IS DEPRESSED
   535                              <1> CAPS_SHIFT	equ	01000000b	; CAPS LOCK KEY IS DEPRE55ED
   536                              <1> INS_SHIFT	equ	10000000b	; INSERT KEY IS DEPRESSED
   537                              <1> ;---------- FLAGS EQUATES WITHIN @KB_FLAG_2 -----------------------------------
   538                              <1> KB_LEDS		equ	00000111b	; KEYBOARD LED STATE BITS
   539                              <1> ;		equ	00000001b	; SCROLL LOCK INDICATOR
   540                              <1> ;		equ	00000010b	; NUM LOCK INDICATOR
   541                              <1> ;		equ	00000100b	; CAPS LOCK INDICATOR
   542                              <1> ;		equ	00001000b	; RESERVED (MUST BE ZERO)
   543                              <1> KB_FA		equ	00010000b	; ACKNOWLEDGMENT RECEIVED
   544                              <1> KB_FE		equ	00100000b	; RESEND RECEIVED FLAG
   545                              <1> KB_PR_LED	equ	01000000b	; MODE INDICATOR UPDATE
   546                              <1> KB_ERR		equ	10000000b	; KEYBOARD TRANSMIT ERROR FLAG
   547                              <1> ;----------- FLAGS EQUATES WITHIN @KB_FLAG_3 -----------------------------------
   548                              <1> LC_E1		equ	00000001b	; LAST CODE WAS THE E1 HIDDEN CODE
   549                              <1> LC_E0		equ	00000010b	; LAST CODE WAS THE E0 HIDDEN CODE
   550                              <1> R_CTL_SHIFT	equ	00000100b	; RIGHT CTL KEY DOWN
   551                              <1> R_ALT_SHIFT	equ	00001000b	; RIGHT ALT KEY DOWN
   552                              <1> GRAPH_ON	equ	00001000b	; ALT GRAPHICS KEY DOWN (WT ONLY)	
   553                              <1> KBX		equ	00010000b	; ENHANCED KEYBOARD INSTALLED
   554                              <1> SET_NUM_LK	equ	00100000b	; FORCE NUM LOCK IF READ ID AND KBX
   555                              <1> LC_AB		equ	01000000b	; LAST CHARACTER WAS FIRST ID CHARACTER
   556                              <1> RD_ID		equ	10000000b	; DOING A READ ID (MUST BE BIT0)
   557                              <1> ;
   558                              <1> ;----------- INTERRUPT EQUATES -------------------------------------------------
   559                              <1> EOI		equ	020h		; END OF INTERRUPT COMMAND TO 8259
   560                              <1> INTA00		equ	020h		; 8259 PORT
   561                              <1> 
   562                              <1> 
   563                              <1> kb_int:
   564                              <1> 
   565                              <1> ; 24/07/2022 - TRDOS 386 v2.0.5
   566                              <1> ; 12/04/2021 - TRDOS 386 v2.0.3 (32 bit push/pop)
   567                              <1> ; 17/10/2015 ('ctrlbrk') 
   568                              <1> ; 05/12/2014
   569                              <1> ; 04/12/2014 (derived from pc-xt-286 bios source code -1986-)
   570                              <1> ; 26/08/2014
   571                              <1> ;
   572                              <1> ; 03/06/86  KEYBOARD BIOS
   573                              <1> ;
   574                              <1> ;--- HARDWARE INT 09H -- (IRQ LEVEL 1) ------------------------------------------
   575                              <1> ;										;
   576                              <1> ;	KEYBOARD INTERRUPT ROUTINE						;
   577                              <1> ;										;
   578                              <1> ;--------------------------------------------------------------------------------
   579                              <1> 
   580                              <1> KB_INT_1:
   581 000010C9 FB                  <1> 	sti				; ENABLE INTERRUPTS
   582                              <1> 	;push	ebp
   583 000010CA 50                  <1> 	push	eax
   584 000010CB 53                  <1> 	push	ebx
   585 000010CC 51                  <1> 	push	ecx
   586 000010CD 52                  <1> 	push	edx
   587 000010CE 56                  <1> 	push	esi
   588 000010CF 57                  <1> 	push	edi
   589 000010D0 1E                  <1> 	push	ds
   590 000010D1 06                  <1> 	push	es
   591 000010D2 FC                  <1> 	cld				; FORWARD DIRECTION
   592 000010D3 66B81000            <1> 	mov	ax, KDATA
   593 000010D7 8ED8                <1> 	mov	ds, ax
   594 000010D9 8EC0                <1> 	mov	es, ax
   595                              <1> 	;
   596                              <1> 	;-----	WAIT FOR KEYBOARD DISABLE COMMAND TO BE ACCEPTED
   597 000010DB B0AD                <1> 	mov	al, DIS_KBD		; DISABLE THE KEYBOARD COMMAND
   598 000010DD E84B050000          <1> 	call	SHIP_IT			; EXECUTE DISABLE
   599 000010E2 FA                  <1> 	cli				; DISABLE INTERRUPTS
   600 000010E3 B900000100          <1> 	mov	ecx, 10000h		; SET MAXIMUM TIMEOUT
   601                              <1> KB_INT_01:
   602 000010E8 E464                <1> 	in	al, STATUS_PORT		; READ ADAPTER STATUS
   603 000010EA A802                <1> 	test	al, INPT_BUF_FULL	; CHECK INPUT BUFFER FULL STATUS BIT
   604 000010EC E0FA                <1> 	loopnz	KB_INT_01		; WAIT FOR COMMAND TO BE ACCEPTED
   605                              <1> 	;
   606                              <1> 	;-----	READ CHARACTER FROM KEYBOARD INTERFACE
   607 000010EE E460                <1> 	in	al, PORT_A		; READ IN THE CHARACTER
   608                              <1> 	;
   609                              <1> 	;-----	SYSTEM HOOK INT 15H - FUNCTION 4FH (ON HARDWARE INT LEVEL 9H) 	
   610                              <1> 	;mov	ah, 04Fh		; SYSTEM INTERCEPT - KEY CODE FUNCTION
   611                              <1> 	;stc				; SET CY=1 (IN CASE OF IRET)
   612                              <1> 	;int	15h			; CASETTE CALL (AL)=KEY SCAN CODE
   613                              <1> 	;				; RETURNS CY=1 FOR INVALID FUNCTION
   614                              <1> 	;jc	KB_INT_02		; CONTINUE IF CARRY FLAG SET ((AL)=CODE)
   615                              <1> 	;jmp	K26			; EXIT IF SYSTEM HANDLES SCAN CODE
   616                              <1> 	;				; EXT HANDLES HARDWARE EOI AND ENABLE		
   617                              <1> 	;
   618                              <1> 	;-----	CHECK FOR A RESEND COMMAND TO KEYBOARD
   619                              <1> KB_INT_02:				; 	  (AL)= SCAN CODE
   620 000010F0 FB                  <1> 	sti				; ENABLE INTERRUPTS AGAIN
   621 000010F1 3CFE                <1> 	cmp	al, KB_RESEND		; IS THE INPUT A RESEND
   622 000010F3 740E                <1>         je      short KB_INT_4          ; GO IF RESEND
   623                              <1> 	;
   624                              <1> 	;-----	CHECK FOR RESPONSE TO A COMMAND TO KEYBOARD
   625 000010F5 3CFA                <1> 	cmp	al, KB_ACK		; IS THE INPUT AN ACKNOWLEDGE
   626 000010F7 7514                <1>         jne     short KB_INT_2          ; GO IF NOT
   627                              <1> 	;
   628                              <1> 	;-----	A COMMAND TO THE KEYBOARD WAS ISSUED
   629 000010F9 FA                  <1> 	cli				; DISABLE INTERRUPTS
   630 000010FA 800D[EB660000]10    <1> 	or	byte [KB_FLAG_2], KB_FA ; INDICATE ACK RECEIVED
   631                              <1>         ;jmp	K26                     ; RETURN IF NOT ACK RETURNED FOR DATA)
   632                              <1> 	; 12/04/2021
   633 00001101 EB76                <1> 	jmp	short ID_EX  ; K26
   634                              <1> 	;
   635                              <1> 	;-----	RESEND THE LAST BYTE
   636                              <1> KB_INT_4:
   637 00001103 FA                  <1> 	cli				; DISABLE INTERRUPTS
   638 00001104 800D[EB660000]20    <1> 	or	byte [KB_FLAG_2], KB_FE ; INDICATE RESEND RECEIVED
   639                              <1>         ;jmp	K26                     ; RETURN IF NOT ACK RETURNED FOR DATA)
   640                              <1> 	; 12/04/2021
   641 0000110B EB6C                <1> 	jmp	short ID_EX  ; K26
   642                              <1> 	;
   643                              <1> ;-----	UPDATE MODE INDICATORS IF CHANGE IN STATE
   644                              <1> KB_INT_2:
   645                              <1> 	;push 	ax			; SAVE DATA IN
   646                              <1> 	; 12/04/2021
   647 0000110D 50                  <1> 	push	eax
   648 0000110E E8E0050000          <1> 	call	MAKE_LED		; GO GET MODE INDICATOR DATA BYTE
   649 00001113 8A1D[EB660000]      <1> 	mov	bl, [KB_FLAG_2] 	; GET PREVIOUS BITS
   650 00001119 30C3                <1> 	xor	bl, al			; SEE IF ANY DIFFERENT
   651 0000111B 80E307              <1> 	and	bl, KB_LEDS		; ISOLATE INDICATOR BITS
   652 0000111E 7405                <1> 	jz	short UP0		; IF NO CHANGE BYPASS UPDATE
   653 00001120 E863050000          <1> 	call	SND_LED			; GO TURN ON MODE INDICATORS
   654                              <1> UP0:
   655                              <1> 	;pop	ax			; RESTORE DATA IN
   656                              <1> 	; 12/04/2021
   657 00001125 58                  <1> 	pop	eax
   658                              <1> ;------------------------------------------------------------------------
   659                              <1> ;	START OF KEY PROCESSING						;
   660                              <1> ;------------------------------------------------------------------------
   661 00001126 88C4                <1> 	mov	ah, al			; SAVE SCAN CODE IN AH ALSO
   662                              <1> 	;
   663                              <1> 	;-----	TEST FOR OVERRUN SCAN CODE FROM KEYBOARD
   664 00001128 3CFF                <1> 	cmp	al, KB_OVER_RUN		; IS THIS AN OVERRUN CHAR
   665                              <1>         ;je	K62			; BUFFER_FULL_BEEP
   666                              <1> 	; 12/04/2021
   667 0000112A 7505                <1> 	jne	short K16
   668 0000112C E9E8040000          <1> 	jmp	K62
   669                              <1> K16:	
   670 00001131 8A3D[EC660000]      <1> 	mov	bh, [KB_FLAG_3]		; LOAD FLAGS FOR TESTING
   671                              <1> 	;
   672                              <1> 	;-----	TEST TO SEE IF A READ_ID IS IN PROGRESS
   673 00001137 F6C7C0              <1> 	test 	bh, RD_ID+LC_AB 	; ARE WE DOING A READ ID?
   674 0000113A 7442                <1> 	jz	short NOT_ID		; CONTINUE IF NOT
   675 0000113C 7914                <1> 	jns	short TST_ID_2		; IS THE RD_ID FLAG ON?
   676 0000113E 3CAB                <1> 	cmp	al, ID_1		; IS THIS THE 1ST ID CHARACTER?
   677 00001140 7507                <1> 	jne	short RST_RD_ID
   678 00001142 800D[EC660000]40    <1> 	or	byte [KB_FLAG_3], LC_AB ; INDICATE 1ST ID WAS OK
   679                              <1> RST_RD_ID:
   680 00001149 8025[EC660000]7F    <1> 	and	byte [KB_FLAG_3], ~RD_ID ; RESET THE READ ID FLAG
   681 00001150 EB27                <1>         jmp	short ID_EX		; AND EXIT
   682                              <1> 	; 12/04/2021
   683                              <1> 	;jmp	K26
   684                              <1> 	;
   685                              <1> TST_ID_2:
   686 00001152 8025[EC660000]BF    <1> 	and	byte [KB_FLAG_3], ~LC_AB ; RESET FLAG
   687 00001159 3C54                <1> 	cmp	al, ID_2A		; IS THIS THE 2ND ID CHARACTER?
   688 0000115B 7415                <1>         je	short KX_BIT		; JUMP IF SO
   689 0000115D 3C41                <1> 	cmp	al, ID_2		; IS THIS THE 2ND ID CHARACTER?
   690 0000115F 7518                <1>         jne	short ID_EX		; LEAVE IF NOT
   691                              <1> 	; 12/04/2021
   692                              <1> 	;jne	K26
   693                              <1> 	;
   694                              <1> 	;-----	A READ ID SAID THAT IT WAS ENHANCED KEYBOARD
   695 00001161 F6C720              <1> 	test	bh, SET_NUM_LK 		; SHOULD WE SET NUM LOCK?
   696 00001164 740C                <1>         jz      short KX_BIT		; EXIT IF NOT
   697 00001166 800D[E9660000]20    <1> 	or	byte [KB_FLAG], NUM_STATE ; FORCE NUM LOCK ON
   698 0000116D E816050000          <1> 	call	SND_LED			; GO SET THE NUM LOCK INDICATOR
   699                              <1> KX_BIT:
   700 00001172 800D[EC660000]10    <1> 	or	byte [KB_FLAG_3], KBX	; INDICATE ENHANCED KEYBOARD WAS FOUND
   701 00001179 E9CB010000          <1> ID_EX:	jmp     K26			; EXIT
   702                              <1> 	;
   703                              <1> NOT_ID:
   704 0000117E 3CE0                <1> 	cmp	al, MC_E0		; IS THIS THE GENERAL MARKER CODE?
   705 00001180 7509                <1> 	jne	short TEST_E1
   706 00001182 800D[EC660000]12    <1> 	or	byte [KB_FLAG_3], LC_E0+KBX ; SET FLAG BIT, SET KBX, AND
   707 00001189 EB0B                <1> 	jmp	short EXIT		; THROW AWAY THIS CODE
   708                              <1> 	; 12/04/2021
   709                              <1> 	;jmp	K26A	
   710                              <1> TEST_E1:	
   711 0000118B 3CE1                <1> 	cmp	al, MC_E1		; IS THIS THE PAUSE KEY?
   712 0000118D 750C                <1> 	jne	short NOT_HC
   713 0000118F 800D[EC660000]11    <1> 	or	byte [KB_FLAG_3], LC_E1+KBX ; SET FLAG BIT, SET KBX, AND
   714 00001196 E9B5010000          <1> EXIT:	jmp	K26A			; THROW AWAY THIS CODE
   715                              <1> 	;
   716                              <1> NOT_HC:
   717 0000119B 247F                <1> 	and	al, 07Fh		; TURN OFF THE BREAK BIT
   718 0000119D F6C702              <1> 	test	bh, LC_E0		; LAST CODE THE E0 MARKER CODE
   719 000011A0 7410                <1> 	jz	short NOT_LC_E0		; JUMP IF NOT
   720                              <1> 	;
   721 000011A2 BF[D6650000]        <1> 	mov	edi, _K6+6		; IS THIS A SHIFT KEY?
   722 000011A7 AE                  <1> 	scasb
   723                              <1> 	;je	K26 ; K16B              ; YES, THROW AWAY & RESET FLAG
   724                              <1> 	; 12/04/2021
   725 000011A8 745B                <1> 	je	short K16B ; K26
   726 000011AA AE                  <1> 	scasb
   727 000011AB 756D                <1> 	jne	short K16A		; NO, CONTINUE KEY PROCESSING
   728                              <1> 	;jmp	short K16B		; YES, THROW AWAY & RESET FLAG
   729 000011AD E997010000          <1> 	jmp	K26
   730                              <1> 	;
   731                              <1> NOT_LC_E0:
   732 000011B2 F6C701              <1> 	test	bh, LC_E1		; LAST CODE THE E1 MARKER CODE?
   733 000011B5 7425                <1> 	jz	short T_SYS_KEY		; JUMP IF NOT
   734 000011B7 B904000000          <1> 	mov	ecx, 4			; LENGHT OF SEARCH
   735 000011BC BF[D4650000]        <1> 	mov	edi, _K6+4		; IS THIS AN ALT, CTL, OR SHIFT?
   736 000011C1 F2AE                <1> 	repne	scasb			; CHECK IT
   737 000011C3 74D1                <1> 	je	short EXIT		; THROW AWAY IF SO
   738                              <1> 	; 12/04/2021
   739                              <1> 	;je	K26A			
   740                              <1> 	;
   741 000011C5 3C45                <1> 	cmp	al, NUM_KEY		; IS IT THE PAUSE KEY?
   742 000011C7 753C                <1> 	jne	short K16B		; NO, THROW AWAY & RESET FLAG
   743                              <1> 	; 12/04/2021
   744                              <1> 	;jne	K26
   745 000011C9 F6C480              <1> 	test	ah, 80h			; YES, IS IT THE BREAK OF THE KEY?
   746 000011CC 7537                <1> 	jnz	short K16B		; YES, THROW THIS AWAY, TOO	
   747                              <1> 	; 24/07/2022
   748                              <1> 	;jnz	K26
   749                              <1>         ; 20/02/2015 
   750 000011CE F605[EA660000]08    <1> 	test	byte [KB_FLAG_1],HOLD_STATE ; NO, ARE WE PAUSED ALREADY?
   751 000011D5 752E                <1> 	jnz	short K16B		; YES, THROW AWAY
   752                              <1> 	; 12/04/2021
   753                              <1> 	;jnz	K26
   754 000011D7 E9B1020000          <1> 	jmp     K39P                    ; NO, THIS IS THE REAL PAUSE STATE
   755                              <1> 	;
   756                              <1> 	;-----	TEST FOR SYSTEM KEY
   757                              <1> T_SYS_KEY:
   758 000011DC 3C54                <1> 	cmp	al, SYS_KEY		; IS IT THE SYSTEM KEY?
   759 000011DE 753A                <1> 	jnz	short K16A		; CONTINUE IF NOT
   760                              <1> 	;
   761 000011E0 F6C480              <1> 	test	ah, 80h			; CHECK IF THIS A BREAK CODE
   762 000011E3 7525                <1> 	jnz	short K16C		; DO NOT TOUCH SYSTEM INDICATOR IF TRUE
   763                              <1> 	;
   764 000011E5 F605[EA660000]04    <1> 	test	byte [KB_FLAG_1], SYS_SHIFT ; SEE IF IN SYSTEM KEY HELD DOWN 
   765 000011EC 7517                <1> 	jnz	short K16B		; IF YES, DO NOT PROCESS SYSTEM INDICATOR	
   766                              <1> 	; 12/04/2021
   767                              <1> 	;jnz	K26		
   768                              <1> 	;
   769 000011EE 800D[EA660000]04    <1> 	or	byte [KB_FLAG_1], SYS_SHIFT ; INDICATE SYSTEM KEY DEPRESSED
   770 000011F5 B020                <1> 	mov	al, EOI			; END OF INTERRUPT COMMAND
   771 000011F7 E620                <1> 	out	20h, al ;out INTA00, al	; SEND COMMAND TO INTERRUPT CONTROL PORT
   772                              <1> 					; INTERRUPT-RETURN-NO-EOI
   773 000011F9 B0AE                <1> 	mov	al, ENA_KBD		; INSURE KEYBOARD IS ENABLED
   774 000011FB E82D040000          <1> 	call	SHIP_IT			; EXECUTE ENABLE
   775                              <1> 	; !!! SYSREQ !!! function/system call (INTERRUPT) must be here !!!
   776                              <1> 	;MOV	AL, 8500H		; FUNCTION VALUE FOR MAKE OF SYSTEM KEY
   777                              <1> 	;STI				; MAKE SURE INTERRUPTS ENABLED
   778                              <1> 	;INT	15H			; USER INTERRUPT	
   779 00001200 E957010000          <1>         jmp     K27A                    ; END PROCESSING
   780                              <1> 	;
   781 00001205 E93F010000          <1> K16B:	jmp	K26			; IGNORE SYSTEM KEY
   782                              <1> 	;
   783                              <1> K16C:
   784 0000120A 8025[EA660000]FB    <1> 	and	byte [KB_FLAG_1], ~SYS_SHIFT ; TURN OFF SHIFT KEY HELD DOWN
   785 00001211 B020                <1> 	mov	al, EOI			; END OF INTERRUPT COMMAND
   786 00001213 E620                <1> 	out	20h, al ;out INTA00, al ; SEND COMMAND TO INTERRUPT CONTROL PORT
   787                              <1> 					; INTERRUPT-RETURN-NO-EOI
   788                              <1> 	;MOV	AL, ENA_KBD		; INSURE KEYBOARD IS ENABLED
   789                              <1> 	;CALL	SHIP_IT			; EXECUTE ENABLE
   790                              <1> 	;
   791                              <1> 	;MOV	AX, 8501H		; FUNCTION VALUE FOR BREAK OF SYSTEM KEY
   792                              <1> 	;STI				; MAKE SURE INTERRUPTS ENABLED
   793                              <1> 	;INT	15H			; USER INTERRUPT
   794                              <1> 	;JMP	K27A			; INGONRE SYSTEM KEY				
   795                              <1> 	;
   796 00001215 E93B010000          <1> 	jmp     K27			; IGNORE SYSTEM KEY
   797                              <1> 	;
   798                              <1> 	;-----	TEST FOR SHIFT KEYS
   799                              <1> K16A:
   800 0000121A 8A1D[E9660000]      <1> 	mov	bl, [KB_FLAG]		; PUT STATE FLAGS IN BL
   801 00001220 BF[D0650000]        <1> 	mov	edi, _K6		; SHIFT KEY TABLE offset
   802 00001225 B908000000          <1> 	mov	ecx, _K6L		; LENGTH
   803 0000122A F2AE                <1> 	repne	scasb			; LOOK THROUGH THE TABLE FOR A MATCH
   804 0000122C 88E0                <1> 	mov	al, ah			; RECOVER SCAN CODE
   805                              <1>         ;jne	K25                     ; IF NO MATCH, THEN SHIFT NOT FOUND
   806                              <1> 	; 12/04/2021
   807 0000122E 7405                <1> 	je	short K17
   808 00001230 E9FC000000          <1> 	jmp	K25
   809                              <1> 	;
   810                              <1> 	;------	SHIFT KEY FOUND
   811                              <1> K17:
   812 00001235 81EF[D1650000]      <1>         sub     edi, _K6+1              ; ADJUST PTR TO SCAN CODE MATCH
   813 0000123B 8AA7[D8650000]      <1>        	mov     ah, [edi+_K7]       	; GET MASK INTO AH
   814 00001241 B102                <1> 	mov	cl, 2			; SETUP COUNT FOR FLAG SHIFTS
   815 00001243 A880                <1> 	test	al, 80h			; TEST FOR BREAK KEY
   816                              <1> 	;jnz	short K23		; JUMP OF BREAK
   817                              <1> 	; 12/04/2021
   818 00001245 7405                <1> 	jz	short K17C
   819 00001247 E981000000          <1> 	jmp	K23
   820                              <1> 	;
   821                              <1> 	;-----	SHIFT MAKE FOUND, DETERMINE SET OR TOGGLE
   822                              <1> K17C:
   823 0000124C 80FC10              <1> 	cmp	ah, SCROLL_SHIFT
   824 0000124F 7324                <1> 	jae	short K18		; IF SCROLL SHIFT OR ABOVE, TOGGLE KEY
   825                              <1> 	;
   826                              <1> 	;-----	PLAIN SHIFT KEY, SET SHIFT ON
   827 00001251 0825[E9660000]      <1> 	or	[KB_FLAG], ah		; TURN ON SHIFT BIT
   828 00001257 A80C                <1>         test	al, CTL_SHIFT+ALT_SHIFT ; IS IT ALT OR CTRL?
   829                              <1> 	;;jnz	short K17D		; YES, MORE FLAGS TO SET
   830                              <1> 	;jz	K26			; NO, INTERRUPT RETURN
   831                              <1> 	; 12/04/2021
   832 00001259 7415                <1> 	jz	short k17f
   833                              <1> K17D:
   834 0000125B F6C702              <1> 	test	bh, LC_E0		; IS THIS ONE OF NEW KEYS?
   835 0000125E 7408                <1> 	jz 	short K17E		; NO, JUMP
   836 00001260 0825[EC660000]      <1> 	or	[KB_FLAG_3], ah		; SET BITS FOR RIGHT CTRL, ALT
   837                              <1> 	;jmp	K26			; INTERRUPT RETURN
   838                              <1> 	; 12/04/2021
   839 00001266 EB08                <1> 	jmp	short k17f
   840                              <1> K17E:
   841 00001268 D2EC                <1> 	shr	ah, cl			; MOVE FLAG BITS TWO POSITIONS
   842 0000126A 0825[EA660000]      <1> 	or	[KB_FLAG_1], ah		; SET BITS FOR LEFT CTRL, ALT
   843                              <1> k17f:	; 12/04/2021
   844 00001270 E9D4000000          <1> 	jmp	K26
   845                              <1> 	;
   846                              <1> 	;-----	TOGGLED SHIFT KEY, TEST FOR 1ST MAKE OR NOT
   847                              <1> K18:					; SHIFT-TOGGLE
   848 00001275 F6C304              <1> 	test	bl, CTL_SHIFT 		; CHECK CTL SHIFT STATE
   849 00001278 7402                <1> 	jz	short K18A              ; JUMP IF NOT CTL STATE
   850                              <1>         ;jnz	K25                     ; JUMP IF CTL STATE
   851                              <1> 	; 12/04/2021
   852 0000127A EB1C                <1> 	jmp	short k20a ; K25
   853                              <1> K18A:
   854 0000127C 3C52                <1> 	cmp	al, INS_KEY		; CHECK FOR INSERT KEY
   855 0000127E 7522                <1> 	jne	short K22		; JUMP IF NOT INSERT KEY
   856 00001280 F6C308              <1> 	test	bl, ALT_SHIFT 		; CHECK FOR ALTERNATE SHIFT
   857 00001283 7402                <1>       	jz	short K18B		; JUMP IF NOT ALTERNATE SHIFT	
   858                              <1>         ;jnz	K25			; JUMP IF ALTERNATE SHIFT
   859                              <1> 	; 12/04/2021
   860 00001285 EB11                <1> 	jmp	short k20a ; K25
   861                              <1> K18B:
   862 00001287 F6C702              <1> 	test	bh, LC_E0 ;20/02/2015	; IS THIS NEW INSERT KEY?
   863 0000128A 7516                <1> 	jnz	short K22		; YES, THIS ONE'S NEVER A '0'
   864                              <1> K19:	
   865 0000128C F6C320              <1> 	test	bl, NUM_STATE 		; CHECK FOR BASE STATE
   866 0000128F 750C                <1> 	jnz	short K21		; JUMP IF NUM LOCK IS ON
   867 00001291 F6C303              <1> 	test	bl, LEFT_SHIFT+RIGHT_SHIFT ; TEST FOR SHIFT STATE
   868 00001294 740C                <1> 	jz	short K22		; JUMP IF BASE STATE
   869                              <1> K20:					; NUMERIC ZERO, NOT INSERT KEY
   870 00001296 88C4                <1> 	mov	ah, al			; PUT SCAN CODE BACK IN AH
   871                              <1> k20a:	; 12/04/2021
   872 00001298 E994000000          <1>         jmp     K25                     ; NUMERAL '0', STNDRD. PROCESSING
   873                              <1> K21:					; MIGHT BE NUMERIC
   874 0000129D F6C303              <1> 	test	bl, LEFT_SHIFT+RIGHT_SHIFT
   875 000012A0 74F4                <1> 	jz	short K20		; IS NUMERIC, STD. PROC.
   876                              <1> 	;
   877                              <1> K22:					; SHIFT TOGGLE KEY HIT; PROCESS IT
   878 000012A2 8425[EA660000]      <1> 	test	ah, [KB_FLAG_1] 	; IS KEY ALREADY DEPRESSED
   879                              <1>         ;jnz	short K26		; JUMP IF KEY ALREADY DEPRESSED
   880                              <1> 	; 12/04/2021
   881 000012A8 75C6                <1> 	jnz	short k17f ; K26
   882                              <1> K22A:
   883 000012AA 0825[EA660000]      <1>         or      [KB_FLAG_1], ah 	; INDICATE THAT THE KEY IS DEPRESSED
   884 000012B0 3025[E9660000]      <1> 	xor	[KB_FLAG], ah		; TOGGLE THE SHIFT STATE
   885                              <1> 	;
   886                              <1> 	;-----	TOGGLE LED IF CAPS, NUM  OR SCROLL KEY DEPRESSED
   887 000012B6 F6C470              <1> 	test	ah, CAPS_SHIFT+NUM_SHIFT+SCROLL_SHIFT ; SHIFT TOGGLE?
   888 000012B9 7407                <1> 	jz	short K22B		; GO IF NOT
   889                              <1> 	;
   890                              <1> 	; 12/04/2021 (32 bit push/pop)
   891 000012BB 50                  <1> 	push	eax ; push ax		; SAVE SCAN CODE AND SHIFT MASK
   892 000012BC E8C7030000          <1> 	call	SND_LED			; GO TURN MODE INDICATORS ON
   893 000012C1 58                  <1> 	pop	eax ; pop ax		; RESTORE SCAN CODE
   894                              <1> K22B:
   895 000012C2 3C52                <1> 	cmp	al, INS_KEY		; TEST FOR 1ST MAKE OF INSERT KEY
   896                              <1>         ;jne	short K26		; JUMP IF NOT INSERT KEY
   897                              <1> 	; 12/04/2021
   898 000012C4 75AA                <1> 	jne	short k17f ; K26
   899 000012C6 88C4                <1> 	mov	ah, al		        ; SCAN CODE IN BOTH HALVES OF AX
   900 000012C8 E999000000          <1>         jmp	K28                     ; FLAGS UPDATED, PROC. FOR BUFFER
   901                              <1> 	;
   902                              <1> 	;-----	BREAK SHIFT FOUND
   903                              <1> K23:					; BREAK-SHIFT-FOUND
   904 000012CD 80FC10              <1> 	cmp	ah, SCROLL_SHIFT	; IS THIS A TOGGLE KEY
   905 000012D0 F6D4                <1> 	not	ah			; INVERT MASK
   906 000012D2 7355                <1> 	jae	short K24		; YES, HANDLE BREAK TOGGLE
   907 000012D4 2025[E9660000]      <1> 	and	[KB_FLAG], ah		; TURN OFF SHIFT BIT
   908 000012DA 80FCFB              <1> 	cmp	ah, ~CTL_SHIFT		; IS THIS ALT OR CTL?
   909 000012DD 7730                <1> 	ja	short K23D		; NO, ALL DONE
   910                              <1> 	;
   911 000012DF F6C702              <1> 	test	bh, LC_E0		; 2ND ALT OR CTL?
   912 000012E2 7408                <1> 	jz	short K23A		; NO, HANSLE NORMALLY
   913 000012E4 2025[EC660000]      <1> 	and 	[KB_FLAG_3], ah		; RESET BIT FOR RIGHT ALT OR CTL
   914 000012EA EB08                <1> 	jmp	short K23B		; CONTINUE
   915                              <1> K23A:
   916 000012EC D2FC                <1> 	sar	ah, cl			; MOVE THE MASK BIT TWO POSITIONS
   917 000012EE 2025[EA660000]      <1> 	and	[KB_FLAG_1], ah		; RESET BIT FOR LEFT ALT AND CTL
   918                              <1> K23B:
   919 000012F4 88C4                <1> 	mov	ah, al			; SAVE SCAN CODE
   920 000012F6 A0[EC660000]        <1> 	mov	al, [KB_FLAG_3]		; GET RIGHT ALT & CTRL FLAGS
   921 000012FB D2E8                <1> 	shr	al, cl			; MOVE TO BITS 1 & 0
   922 000012FD 0A05[EA660000]      <1> 	or	al, [KB_FLAG_1]		; PUT IN LEFT ALT & CTL FLAGS
   923 00001303 D2E0                <1> 	shl	al, cl			; MOVE BACK TO BITS 3 & 2
   924 00001305 240C                <1> 	and	al, ALT_SHIFT+CTL_SHIFT ; FILTER OUT OTHER GARBAGE
   925 00001307 0805[E9660000]      <1> 	or	[KB_FLAG], al		; PUT RESULT IN THE REAL FLAGS	
   926 0000130D 88E0                <1> 	mov	al, ah
   927                              <1> K23D:
   928 0000130F 3CB8                <1> 	cmp	al, ALT_KEY+80h		; IS THIS ALTERNATE SHIFT RELEASE
   929 00001311 7536                <1> 	jne	short K26		; INTERRUPT RETURN
   930                              <1> 	;	
   931                              <1> 	;-----	ALTERNATE SHIFT KEY RELEASED, GET THE VALUE INTO BUFFER
   932 00001313 A0[ED660000]        <1> 	mov	al, [ALT_INPUT]
   933 00001318 B400                <1> 	mov	ah, 0			; SCAN CODE OF 0
   934 0000131A 8825[ED660000]      <1> 	mov	[ALT_INPUT], ah 	; ZERO OUT THE FIELD
   935 00001320 3C00                <1> 	cmp	al, 0			; WAS THE INPUT = 0?
   936 00001322 7425                <1> 	je	short K26		; INTERRUPT_RETURN
   937                              <1>         ; 29/01/2016
   938                              <1> 	;jmp	K61			; IT WASN'T, SO PUT IN BUFFER
   939 00001324 E9AB020000          <1> 	jmp	_K60
   940                              <1> 	;
   941                              <1> K24:					; BREAK-TOGGLE
   942 00001329 2025[EA660000]      <1> 	and	[KB_FLAG_1], ah 	; INDICATE NO LONGER DEPRESSED
   943 0000132F EB18                <1> 	jmp	short K26		; INTERRUPT_RETURN
   944                              <1> 	;
   945                              <1> 	;-----	TEST FOR HOLD STATE
   946                              <1> 					; AL, AH = SCAN CODE
   947                              <1> K25:					; NO-SHIFT-FOUND
   948 00001331 3C80                <1> 	cmp	al, 80h			; TEST FOR BREAK KEY
   949 00001333 7314                <1> 	jae	short K26		; NOTHING FOR BREAK CHARS FROM HERE ON
   950 00001335 F605[EA660000]08    <1> 	test	byte [KB_FLAG_1], HOLD_STATE ; ARE WE IN HOLD STATE
   951 0000133C 7428                <1> 	jz	short K28		; BRANCH AROUND TEST IF NOT
   952 0000133E 3C45                <1> 	cmp	al, NUM_KEY
   953 00001340 7407                <1> 	je	short K26		; CAN'T END HOLD ON NUM_LOCK
   954 00001342 8025[EA660000]F7    <1> 	and	byte [KB_FLAG_1], ~HOLD_STATE ; TURN OFF THE HOLD STATE BIT
   955                              <1> K26:
   956 00001349 8025[EC660000]FC    <1> 	and	byte [KB_FLAG_3], ~(LC_E0+LC_E1) ; RESET LAST CHAR H.C. FLAG
   957                              <1> K26A:					; INTERRUPT-RETURN
   958 00001350 FA                  <1> 	cli				; TURN OFF INTERRUPTS
   959 00001351 B020                <1> 	mov	al, EOI			; END OF INTERRUPT COMMAND
   960 00001353 E620                <1> 	out	20h, al	;out INTA00, al	; SEND COMMAND TO INTERRUPT CONTROL PORT
   961                              <1> K27:					; INTERRUPT-RETURN-NO-EOI
   962 00001355 B0AE                <1> 	mov	al, ENA_KBD		; INSURE KEYBOARD IS ENABLED
   963 00001357 E8D1020000          <1> 	call	SHIP_IT			; EXECUTE ENABLE
   964                              <1> K27A:
   965 0000135C FA                  <1> 	cli				; DISABLE INTERRUPTS
   966                              <1> 	;;mov	byte [intflg], 0 ; 07/01/2017 ;; 15/01/2017
   967 0000135D 07                  <1> 	pop	es			; RESTORE REGISTERS
   968 0000135E 1F                  <1> 	pop	ds
   969 0000135F 5F                  <1> 	pop	edi
   970 00001360 5E                  <1> 	pop	esi
   971 00001361 5A                  <1> 	pop	edx
   972 00001362 59                  <1> 	pop	ecx
   973 00001363 5B                  <1> 	pop	ebx
   974 00001364 58                  <1> 	pop	eax
   975                              <1> 	;pop	ebp
   976 00001365 CF                  <1> 	iretd				; RETURN
   977                              <1> 
   978                              <1> 	;-----	NOT IN	HOLD STATE
   979                              <1> K28:					; NO-HOLD-STATE
   980 00001366 3C58                <1> 	cmp	al, 88			; TEST FOR OUT-OF-RANGE SCAN CODES
   981 00001368 77DF                <1> 	ja	short K26		; IGNORE IF OUT-OF-RANGE	
   982                              <1> 	;
   983 0000136A F6C308              <1> 	test	bl, ALT_SHIFT 		; ARE WE IN ALTERNATE SHIFT
   984 0000136D 740E                <1>         jz	short K28A		; IF NOT ALTERNATE
   985                              <1>         ; 12/04/2021
   986                              <1> 	;jz	K38
   987                              <1> 	;
   988 0000136F F6C710              <1> 	test	bh, KBX			; IS THIS THE ENCHANCED KEYBOARD?
   989 00001372 740E                <1> 	jz	short K29		; NO, ALT STATE IS REAL
   990                              <1> 	 ;28/02/2015
   991 00001374 F605[EA660000]04    <1> 	test	byte [KB_FLAG_1], SYS_SHIFT ; YES, IS SYSREQ KEY DOWN?
   992 0000137B 7405                <1> 	jz	short K29		;  NO, ALT STATE IS REAL
   993                              <1> 	; 12/04/2021
   994                              <1> 	;jnz	K38			; YES, THIS IS PHONY ALT STATE 
   995                              <1>         ;				; DUE TO PRESSING SYSREQ	
   996 0000137D E9C4000000          <1> K28A:	jmp	K38
   997                              <1> 	;
   998                              <1> 	;-----	TEST FOR RESET KEY SEQUENCE (CTL ALT DEL)
   999                              <1> K29:					; TEST-RESET
  1000 00001382 F6C304              <1> 	test	bl, CTL_SHIFT 		; ARE WE IN CONTROL SHIFT ALSO?
  1001 00001385 740B                <1> 	jz	short K31		; NO_RESET
  1002 00001387 3C53                <1> 	cmp	al, DEL_KEY		; CTL-ALT STATE, TEST FOR DELETE KEY
  1003 00001389 7507                <1> 	jne	short K31		; NO_RESET, IGNORE
  1004                              <1> 	;
  1005                              <1> 	;-----	CTL-ALT-DEL HAS BEEN FOUND
  1006                              <1>  	; 26/08/2014
  1007                              <1> cpu_reset:
  1008                              <1> 	; IBM PC/AT ROM BIOS source code - 10/06/85 (TEST4.ASM - PROC_SHUTDOWN)
  1009                              <1> 	; Send FEh (system reset command) to the keyboard controller.
  1010 0000138B B0FE                <1> 	mov	al, SHUT_CMD		; SHUTDOWN COMMAND
  1011 0000138D E664                <1> 	out	STATUS_PORT, al		; SEND TO KEYBOARD CONTROL PORT
  1012                              <1> khere:
  1013 0000138F F4                  <1> 	hlt				; WAIT FOR 80286 RESET
  1014 00001390 EBFD                <1> 	jmp 	short khere		; INSURE HALT
  1015                              <1> 	;
  1016                              <1> 	;-----	IN ALTERNATE SHIFT, RESET NOT FOUND
  1017                              <1> K31:					; NO-RESET
  1018 00001392 3C39                <1> 	cmp	al, 57			; TEST FOR SPACE KEY
  1019 00001394 7507                <1> 	jne	short K311		; NOT THERE
  1020 00001396 B020                <1> 	mov	al, ' '			; SET SPACE CHAR
  1021                              <1> k31a:	; 12/04/2021
  1022 00001398 E929020000          <1>         jmp     K57                     ; BUFFER_FILL
  1023                              <1> K311:
  1024 0000139D 3C0F                <1> 	cmp	al, 15			; TEST FOR TAB KEY
  1025 0000139F 7506                <1> 	jne	short K312		; NOT THERE
  1026 000013A1 66B800A5            <1> 	mov	ax, 0A500h		; SET SPECIAL CODE FOR ALT-TAB
  1027                              <1>         ;jmp	K57			; BUFFER_FILL
  1028                              <1> 	; 12/04/2021
  1029 000013A5 EBF1                <1> 	jmp	short k31a
  1030                              <1> K312:
  1031 000013A7 3C4A                <1> 	cmp	al, 74			; TEST FOR KEY PAD -
  1032                              <1>         ;je	short K37B		; GO PROCESS
  1033                              <1> 	; 12/04/2021
  1034 000013A9 7404                <1> 	je	short k312a
  1035 000013AB 3C4E                <1> 	cmp	al, 78			; TEST FOR KEY PAD +
  1036                              <1>         ;je	short K37B		; GO PROCESS
  1037                              <1> 	; 12/04/2021
  1038 000013AD 7505                <1> 	jne	short K32
  1039                              <1> k312a:
  1040 000013AF E988000000          <1> 	jmp	K37B	
  1041                              <1> 	;
  1042                              <1> 	;-----	LOOK FOR KEY PAD ENTRY
  1043                              <1> K32:					; ALT-KEY-PAD
  1044 000013B4 BF[AC650000]        <1> 	mov	edi, K30		; ALT-INPUT-TABLE offset
  1045 000013B9 B90A000000          <1> 	mov	ecx, 10			; LOOK FOR ENTRY USING KEYPAD
  1046 000013BE F2AE                <1> 	repne	scasb			; LOOK FOR MATCH
  1047 000013C0 7521                <1> 	jne	short K33		; NO_ALT_KEYPAD
  1048 000013C2 F6C702              <1> 	test	bh, LC_E0		; IS THIS ONE OF THE NEW KEYS?
  1049 000013C5 7579                <1>         jnz	short K37C		; YES, JUMP, NOT NUMPAD KEY
  1050 000013C7 81EF[AD650000]      <1> 	sub	edi, K30+1		; DI NOW HAS ENTRY VALUE
  1051 000013CD A0[ED660000]        <1> 	mov	al, [ALT_INPUT] 	; GET THE CURRENT BYTE
  1052 000013D2 B40A                <1> 	mov	ah, 10			; MULTIPLY BY 10
  1053 000013D4 F6E4                <1> 	mul	ah
  1054 000013D6 6601F8              <1> 	add	ax, di			; ADD IN THE LATEST ENTRY
  1055 000013D9 A2[ED660000]        <1> 	mov	[ALT_INPUT], al 	; STORE IT AWAY
  1056                              <1> K32A:
  1057 000013DE E966FFFFFF          <1>         jmp     K26                     ; THROW AWAY THAT KEYSTROKE
  1058                              <1> 	;
  1059                              <1> 	;-----	LOOK FOR SUPERSHIFT ENTRY
  1060                              <1> K33:					; NO-ALT-KEYPAD
  1061 000013E3 C605[ED660000]00    <1>         mov     byte [ALT_INPUT], 0     ; ZERO ANY PREVIOUS ENTRY INTO INPUT
  1062 000013EA B91A000000          <1> 	mov	ecx, 26			; (DI),(ES) ALREADY POINTING
  1063 000013EF F2AE                <1> 	repne	scasb			; LOOK FOR MATCH IN ALPHABET
  1064 000013F1 7445                <1> 	je	short K37A		; MATCH FOUND, GO FILLL THE BUFFER
  1065                              <1> 	;
  1066                              <1> 	;-----	LOOK FOR TOP ROW OF ALTERNATE SHIFT
  1067                              <1> K34:					; ALT-TOP-ROW
  1068 000013F3 3C02                <1> 	cmp	al, 2			; KEY WITH '1' ON IT
  1069 000013F5 7245                <1> 	jb	short K37B		; MUST BE ESCAPE
  1070 000013F7 3C0D                <1> 	cmp	al, 13			; IS IT IN THE REGION
  1071 000013F9 7705                <1> 	ja	short K35		; NO, ALT SOMETHING ELSE
  1072 000013FB 80C476              <1> 	add	ah, 118			; CONVERT PSEUDO SCAN CODE TO RANGE
  1073 000013FE EB38                <1> 	jmp	short K37A		; GO FILL THE BUFFER
  1074                              <1> 	;
  1075                              <1> 	;-----	TRANSLATE ALTERNATE SHIFT PSEUDO SCAN CODES
  1076                              <1> K35:					; ALT-FUNCTION
  1077 00001400 3C57                <1> 	cmp	al, F11_M		; IS IT F11?	
  1078 00001402 7209                <1> 	jb	short K35A ; 20/02/2015	; NO, BRANCH
  1079 00001404 3C58                <1> 	cmp	al, F12_M		; IS IT F12?
  1080 00001406 7705                <1> 	ja	short K35A ; 20/02/2015	; NO, BRANCH
  1081 00001408 80C434              <1> 	add	ah, 52			; CONVERT TO PSEUDO SCAN CODE
  1082 0000140B EB2B                <1> 	jmp	short K37A		; GO FILL THE BUFFER
  1083                              <1> K35A:
  1084 0000140D F6C702              <1> 	test	bh, LC_E0		; DO WE HAVE ONE OF THE NEW KEYS?
  1085 00001410 741B                <1> 	jz	short K37		; NO, JUMP
  1086 00001412 3C1C                <1> 	cmp	al, 28			; TEST FOR KEYPAD ENTER
  1087 00001414 7506                <1>         jne     short K35B              ; NOT THERE
  1088 00001416 66B800A6            <1> 	mov	ax, 0A600h		; SPECIAL CODE
  1089                              <1> 	;jmp	K57			; BUFFER FILL
  1090                              <1> 	; 12/04/2021
  1091 0000141A EB0C                <1> 	jmp	short k35c
  1092                              <1> K35B:
  1093 0000141C 3C53                <1> 	cmp	al, 83			; TEST FOR DELETE KEY
  1094 0000141E 7420                <1> 	je	short K37C		; HANDLE WITH OTHER EDIT KEYS
  1095 00001420 3C35                <1> 	cmp	al, 53			; TEST FOR KEYPAD /
  1096 00001422 75BA                <1> 	jne	short K32A		; NOT THERE, NO OTHER E0 SPECIALS
  1097                              <1>         ; 12/04/2021
  1098                              <1> 	;jne	K26
  1099 00001424 66B800A4            <1> 	mov	ax, 0A400h		; SPECIAL CODE1
  1100                              <1> k35c:	; 12/04/2021
  1101 00001428 E999010000          <1> 	jmp	K57			; BUFFER FILL
  1102                              <1> K37:
  1103 0000142D 3C3B                <1> 	cmp	al, 59			; TEST FOR FUNCTION KEYS (F1)
  1104 0000142F 720B                <1>         jb      short K37B		; NO FN, HANDLE W/OTHER EXTENDED
  1105 00001431 3C44                <1> 	cmp	al, 68			; IN KEYPAD REGION?
  1106 00001433 77A9                <1> 	ja	short K32A		; IF SO, IGNORE
  1107                              <1> 	; 12/04/2021
  1108                              <1> 	;ja	K26
  1109 00001435 80C42D              <1> 	add	ah, 45			; CONVERT TO PSEUDO SCAN CODE
  1110                              <1> K37A:
  1111 00001438 B000                <1> 	mov	al, 0			; ASCII CODE OF ZERO
  1112                              <1> 	;jmp	K57			; PUT IT IN THE BUFFER
  1113                              <1> 	; 12/04/2021
  1114 0000143A EBEC                <1> 	jmp	short k35c
  1115                              <1> K37B:
  1116 0000143C B0F0                <1> 	mov	al, 0F0h		; USE SPECIAL ASCII CODE
  1117                              <1> 	;jmp	K57			; PUT IT IN THE BUFFER
  1118                              <1> 	; 12/04/2021
  1119 0000143E EBE8                <1> 	jmp	short k35c
  1120                              <1> K37C:
  1121 00001440 0450                <1> 	add	al, 80			; CONVERT SCAN CODE (EDIT KEYS)
  1122 00001442 88C4                <1> 	mov	ah, al			; (SCAN CODE NOT IN AH FOR INSERT)
  1123 00001444 EBF2                <1> 	jmp     short K37A              ; PUT IT IN THE BUFFER
  1124                              <1> 	;
  1125                              <1> 	;-----	NOT IN ALTERNATE SHIFT
  1126                              <1> K38:					; NOT-ALT-SHIFT
  1127                              <1> 					; BL STILL HAS SHIFT FLAGS
  1128 00001446 F6C304              <1> 	test	bl, CTL_SHIFT 		; ARE WE IN CONTROL SHIFT?
  1129                              <1> 	;;jnz	short K38A		; YES, START PROCESSING	
  1130                              <1>         ;jz	K44			; NOT-CTL-SHIFT
  1131                              <1> 	; 12/04/2021
  1132 00001449 7505                <1> 	jnz	short K38A		; YES, START PROCESSING	
  1133 0000144B E9AB000000          <1> 	jmp	K44			; NOT-CTL-SHIFT
  1134                              <1> 	;
  1135                              <1> 	;-----	CONTROL SHIFT, TEST SPECIAL CHARACTERS
  1136                              <1> 	;-----	TEST FOR BREAK
  1137                              <1> K38A:
  1138 00001450 3C46                <1> 	cmp	al, SCROLL_KEY		; TEST FOR BREAK
  1139 00001452 7530                <1> 	jne	short K39		; JUMP, NO-BREAK
  1140 00001454 F6C710              <1> 	test	bh, KBX			; IS THIS THE ENHANCED KEYBOARD?
  1141 00001457 7405                <1> 	jz	short K38B		; NO, BREAK IS VALID	
  1142 00001459 F6C702              <1> 	test	bh, LC_E0		; YES, WAS LAST CODE AN E0?
  1143 0000145C 7426                <1> 	jz	short K39		; NO-BREAK, TEST FOR PAUSE	
  1144                              <1> K38B:
  1145 0000145E 8B1D[F6660000]      <1> 	mov	ebx, [BUFFER_HEAD] 	; RESET BUFFER TO EMPTY
  1146 00001464 891D[FA660000]      <1> 	mov	[BUFFER_TAIL], ebx
  1147 0000146A C605[E8660000]80    <1> 	mov	byte [BIOS_BREAK], 80h  ; TURN ON BIOS_BREAK BIT
  1148                              <1> 	;
  1149                              <1> 	;-----	ENABLE KEYBOARD
  1150 00001471 B0AE                <1> 	mov	al, ENA_KBD		; ENABLE KEYBOARD
  1151 00001473 E8B5010000          <1> 	call	SHIP_IT			; EXECUTE ENABLE
  1152                              <1> 	;
  1153                              <1> 	; CTRL+BREAK code here !!!
  1154                              <1> 	;INT	1BH			; BREAK INTERRUPT VECTOR
  1155                              <1> 	; 17/10/2015	
  1156 00001478 E8B1580000          <1> 	call	ctrlbrk ; control+break subroutine
  1157                              <1> 	;
  1158                              <1> 	;sub	ax, ax			; PUT OUT DUMMY CHARACTER
  1159                              <1>         ; 12/04/2021
  1160 0000147D 29C0                <1> 	sub	eax, eax
  1161 0000147F E942010000          <1>         jmp     K57                     ; BUFFER_FILL
  1162                              <1> 	;
  1163                              <1> 	;-----	TEST FOR PAUSE
  1164                              <1> K39:					; NO_BREAK
  1165 00001484 F6C710              <1> 	test	bh, KBX			; IS THIS THE ENHANCED KEYBOARD?
  1166 00001487 7537                <1> 	jnz	short K41		; YES, THEN THIS CAN'T BE PAUSE	
  1167 00001489 3C45                <1> 	cmp	al, NUM_KEY		; LOOK FOR PAUSE KEY
  1168 0000148B 7533                <1> 	jne	short K41		; NO-PAUSE
  1169                              <1> K39P:
  1170 0000148D 800D[EA660000]08    <1> 	or	byte [KB_FLAG_1], HOLD_STATE ; TURN ON THE HOLD FLAG
  1171                              <1> 	;
  1172                              <1> 	;-----	ENABLE KEYBOARD
  1173 00001494 B0AE                <1> 	mov	al, ENA_KBD		; ENABLE KEYBOARD
  1174 00001496 E892010000          <1> 	call	SHIP_IT			; EXECUTE ENABLE
  1175                              <1> K39A:
  1176 0000149B B020                <1> 	mov	al, EOI			; END OF INTERRUPT TO CONTROL PORT
  1177 0000149D E620                <1> 	out	20h, al ;out INTA00, al	; ALLOW FURTHER KEYSTROKE INTERRUPTS
  1178                              <1> 	;
  1179                              <1> 	;-----	DURING PAUSE INTERVAL, TURN COLOR CRT BACK ON
  1180 0000149F 803D[1E670000]07    <1>         cmp     byte [CRT_MODE], 7      ; IS THIS BLACK AND WHITE CARD
  1181 000014A6 740A                <1>         je      short K40              	; YES, NOTHING TO DO
  1182 000014A8 66BAD803            <1> 	mov	dx, 03D8h		; PORT FOR COLOR CARD
  1183 000014AC A0[1F670000]        <1>         mov     al, [CRT_MODE_SET] 	; GET THE VALUE OF THE CURRENT MODE
  1184 000014B1 EE                  <1> 	out	dx, al			; SET THE CRT MODE, SO THAT CRT IS ON
  1185                              <1> 	;
  1186                              <1> K40:					; PAUSE-LOOP
  1187 000014B2 F605[EA660000]08    <1>         test    byte [KB_FLAG_1], HOLD_STATE ; CHECK HOLD STATE FLAG
  1188 000014B9 75F7                <1> 	jnz	short K40		; LOOP UNTIL FLAG TURNED OFF
  1189                              <1> 	;
  1190 000014BB E995FEFFFF          <1>         jmp     K27                     ; INTERRUPT_RETURN_NO_EOI
  1191                              <1>         ;
  1192                              <1> 	;-----	TEST SPECIAL CASE KEY 55
  1193                              <1> K41:					; NO-PAUSE
  1194 000014C0 3C37                <1> 	cmp	al, 55			; TEST FOR */PRTSC KEY
  1195 000014C2 7513                <1> 	jne	short K42		; NOT-KEY-55
  1196 000014C4 F6C710              <1> 	test	bh, KBX			; IS THIS THE ENHANCED KEYBOARD?
  1197 000014C7 7405                <1> 	jz	short K41A		; NO, CTL-PRTSC IS VALID	
  1198 000014C9 F6C702              <1> 	test	bh, LC_E0		; YES, WAS LAST CODE AN E0?
  1199 000014CC 7421                <1> 	jz	short K42B		; NO, TRANSLATE TO A FUNCTION
  1200                              <1> K41A:	
  1201 000014CE 66B80072            <1> 	mov	ax, 114*256		; START/STOP PRINTING SWITCH
  1202 000014D2 E9EF000000          <1>         jmp     K57                     ; BUFFER_FILL
  1203                              <1> 	;
  1204                              <1> 	;-----	SET UP TO TRANSLATE CONTROL SHIFT
  1205                              <1> K42:					; NOT-KEY-55
  1206 000014D7 3C0F                <1> 	cmp	al, 15			; IS IT THE TAB KEY?
  1207 000014D9 7414                <1> 	je	short K42B		; YES, XLATE TO FUNCTION CODE
  1208 000014DB 3C35                <1> 	cmp	al, 53			; IS IT THE / KEY?
  1209 000014DD 750E                <1> 	jne	short K42A		; NO, NO MORE SPECIAL CASES	
  1210 000014DF F6C702              <1> 	test	bh, LC_E0		; YES, IS IT FROM THE KEY PAD?
  1211 000014E2 7409                <1> 	jz	short K42A		; NO, JUST TRANSLATE
  1212 000014E4 66B80095            <1> 	mov	ax, 9500h		; YES, SPECIAL CODE FOR THIS ONE
  1213 000014E8 E9D9000000          <1> 	jmp	K57			; BUFFER FILL	
  1214                              <1> K42A: 
  1215                              <1> 	;;mov	ebx, _K8		; SET UP TO TRANSLATE CTL
  1216 000014ED 3C3B                <1> 	cmp	al, 59			; IS IT IN CHARACTER TABLE?
  1217                              <1>         ;jb	short K45F              ; YES, GO TRANSLATE CHAR
  1218                              <1> 	;;jb	K56 ; 20/02/2015
  1219                              <1> 	;;jmp	K64 ; 20/02/2015
  1220                              <1> K42B:
  1221 000014EF BB[E0650000]        <1> 	mov	ebx, _K8		; SET UP TO TRANSLATE CTL
  1222                              <1> 	;jb	K56 ;; 20/02/2015
  1223                              <1> 	; 12/04/2021
  1224 000014F4 7267                <1> 	jb	short K45F	
  1225 000014F6 E9B9000000          <1> 	jmp	K64	
  1226                              <1>         ;
  1227                              <1> 	;-----	NOT IN CONTROL SHIFT
  1228                              <1> K44:					; NOT-CTL-SHIFT
  1229 000014FB 3C37                <1> 	cmp	al, 55			; PRINT SCREEN KEY?
  1230 000014FD 7528                <1> 	jne	short K45		; NOT PRINT SCREEN
  1231 000014FF F6C710              <1> 	test	bh, KBX			; IS THIS ENHANCED KEYBOARD?
  1232 00001502 7407                <1> 	jz	short K44A		; NO, TEST FOR SHIFT STATE	
  1233 00001504 F6C702              <1> 	test	bh, LC_E0		; YES, LAST CODE A MARKER?
  1234 00001507 7507                <1> 	jnz	short K44B		; YES, IS PRINT SCREEN
  1235 00001509 EB41                <1> 	jmp	short K45C		; NO, TRANSLATE TO '*' CHARACTER
  1236                              <1> K44A:
  1237 0000150B F6C303              <1> 	test	bl, LEFT_SHIFT+RIGHT_SHIFT ; NOT 101 KBD, SHIFT KEY DOWN?
  1238 0000150E 743C                <1> 	jz	short K45C		; NO, TRANSLATE TO '*' CHARACTER
  1239                              <1> 	;
  1240                              <1> 	;-----	ISSUE INTERRUPT TO INDICATE PRINT SCREEN FUNCTION
  1241                              <1> K44B:
  1242 00001510 B0AE                <1> 	mov	al, ENA_KBD		; INSURE KEYBOARD IS ENABLED
  1243 00001512 E816010000          <1> 	call	SHIP_IT			; EXECUTE ENABLE
  1244 00001517 B020                <1> 	mov	al, EOI			; END OF CURRENT INTERRUPT
  1245 00001519 E620                <1> 	out	20h, al ;out INTA00, al	; SO FURTHER THINGS CAN HAPPEN
  1246                              <1> 	; Print Screen !!!		; ISSUE PRINT SCREEN INTERRUPT (INT 05h)
  1247                              <1> 	;PUSH 	BP			; SAVE POINTER
  1248                              <1> 	;INT 	5H			; ISSUE PRINT SCREEN INTERRUPT
  1249                              <1> 	;POP	BP			; RESTORE POINTER
  1250 0000151B 8025[EC660000]FC    <1>         and     byte [KB_FLAG_3], ~(LC_E0+LC_E1) ; ZERO OUT THESE FLAGS
  1251 00001522 E92EFEFFFF          <1>         jmp     K27                     ; GO BACK WITHOUT EOI OCCURRING
  1252                              <1> 	;
  1253                              <1> 	;-----	HANDLE IN-CORE KEYS
  1254                              <1> K45:					; NOT-PRINT-SCREEN
  1255 00001527 3C3A                <1> 	cmp	al, 58			; TEST FOR IN-CORE AREA
  1256 00001529 7734                <1> 	ja	short K46		; JUMP IF NOT
  1257 0000152B 3C35                <1> 	cmp	al, 53			; IS THIS THE '/' KEY?
  1258 0000152D 7505                <1> 	jne	short K45A		; NO, JUMP
  1259 0000152F F6C702              <1> 	test	bh, LC_E0		; WAS THE LAST CODE THE MARKER?
  1260 00001532 7518                <1> 	jnz	short K45C		; YES, TRANSLATE TO CHARACTER
  1261                              <1> K45A:
  1262 00001534 B91A000000          <1> 	mov	ecx, 26			; LENGHT OF SEARCH
  1263 00001539 BF[B6650000]        <1> 	mov	edi, K30+10		; POINT TO TABLE OF A-Z CHARS
  1264 0000153E F2AE                <1> 	repne	scasb			; IS THIS A LETTER KEY?
  1265                              <1> 		; 20/02/2015
  1266 00001540 7505                <1> 	jne	short K45B              ; NO, SYMBOL KEY
  1267                              <1> 	;
  1268 00001542 F6C340              <1> 	test	bl, CAPS_STATE		; ARE WE IN CAPS_LOCK?
  1269 00001545 750C                <1> 	jnz	short K45D		; TEST FOR SURE
  1270                              <1> K45B:
  1271 00001547 F6C303              <1> 	test	bl, LEFT_SHIFT+RIGHT_SHIFT ; ARE WE IN SHIFT STATE?
  1272 0000154A 750C                <1> 	jnz	short K45E		; YES, UPPERCASE
  1273                              <1> 					; NO, LOWERCASE
  1274                              <1> K45C:
  1275 0000154C BB[38660000]        <1> 	mov	ebx, K10		; TRANSLATE TO LOWERCASE LETTERS
  1276 00001551 EB51                <1> 	jmp	short K56	
  1277                              <1> K45D:					; ALMOST-CAPS-STATE
  1278 00001553 F6C303              <1> 	test	bl, LEFT_SHIFT+RIGHT_SHIFT ; CL ON. IS SHIFT ON, TOO?
  1279 00001556 75F4                <1> 	jnz	short K45C		; SHIFTED TEMP OUT OF CAPS STATE
  1280                              <1> K45E:
  1281 00001558 BB[90660000]        <1> 	mov	ebx, K11		; TRANSLATE TO UPPER CASE LETTERS
  1282 0000155D EB45                <1> K45F:	jmp	short K56
  1283                              <1> 	;
  1284                              <1> 	;-----	TEST FOR KEYS F1 - F10
  1285                              <1> K46:					; NOT IN-CORE AREA
  1286 0000155F 3C44                <1> 	cmp	al, 68			; TEST FOR F1 - F10
  1287                              <1> 	;ja	short K47		; JUMP IF NOT
  1288                              <1> 	;jmp	short K53		; YES, GO DO FN KEY PROCESS			
  1289 00001561 7635                <1> 	jna	short K53		
  1290                              <1> 	;
  1291                              <1> 	;-----	HANDLE THE NUMERIC PAD KEYS
  1292                              <1> K47:					; NOT F1 - F10
  1293 00001563 3C53                <1> 	cmp	al, 83			; TEST NUMPAD KEYS
  1294 00001565 772D                <1> 	ja	short K52		; JUMP IF NOT
  1295                              <1> 	;
  1296                              <1> 	;-----	KEYPAD KEYS, MUST TEST NUM LOCK FOR DETERMINATION
  1297                              <1> K48:
  1298 00001567 3C4A                <1> 	cmp	al, 74			; SPECIAL CASE FOR MINUS
  1299 00001569 74ED                <1> 	je	short K45E		; GO TRANSLATE
  1300 0000156B 3C4E                <1> 	cmp	al, 78			; SPECIAL CASE FOR PLUS
  1301 0000156D 74E9                <1> 	je	short K45E		; GO TRANSLATE
  1302 0000156F F6C702              <1> 	test	bh, LC_E0		; IS THIS ONE OFTHE NEW KEYS?
  1303 00001572 750A                <1> 	jnz	short K49		; YES, TRANSLATE TO BASE STATE
  1304                              <1> 	;		
  1305 00001574 F6C320              <1> 	test 	bl, NUM_STATE		; ARE WE IN NUM LOCK
  1306 00001577 7514                <1> 	jnz	short K50		; TEST FOR SURE
  1307 00001579 F6C303              <1> 	test	bl, LEFT_SHIFT+RIGHT_SHIFT ; ARE WE IN SHIFT STATE?
  1308                              <1> 	;jnz	short K51		; IF SHIFTED, REALLY NUM STATE
  1309 0000157C 75DA                <1> 	jnz	short K45E
  1310                              <1> 	;
  1311                              <1> 	;-----	BASE CASE FOR KEYPAD
  1312                              <1> K49:					
  1313 0000157E 3C4C                <1> 	cmp	al, 76			; SPECIAL CASE FOR BASE STATE 5
  1314 00001580 7504                <1> 	jne	short K49A		; CONTINUE IF NOT KEYPAD 5
  1315 00001582 B0F0                <1> 	mov	al, 0F0h		; SPECIAL ASCII CODE	
  1316 00001584 EB40                <1> 	jmp	short K57		; BUFFER FILL
  1317                              <1> K49A:
  1318 00001586 BB[38660000]        <1> 	mov	ebx, K10		; BASE CASE TABLE	
  1319 0000158B EB27                <1> 	jmp	short K64		; CONVERT TO PSEUDO SCAN
  1320                              <1> 	;
  1321                              <1> 	;-----	MIGHT BE NUM LOCK, TEST SHIFT STATUS
  1322                              <1> K50:					; ALMOST-NUM-STATE
  1323 0000158D F6C303              <1>         test    bl, LEFT_SHIFT+RIGHT_SHIFT
  1324 00001590 75EC                <1> 	jnz 	short K49		; SHIFTED TEMP OUT OF NUM STATE
  1325 00001592 EBC4                <1> K51:	jmp	short K45E		; REALLY NUM STATE
  1326                              <1> 	;
  1327                              <1> 	;-----	TEST FOR THE NEW KEYS ON WT KEYBOARDS 
  1328                              <1> K52:					; NOT A NUMPAD KEY
  1329 00001594 3C56                <1> 	cmp	al, 86			; IS IT THE NEW WT KEY?
  1330                              <1> 	;jne	short K53		; JUMP IF NOT
  1331                              <1> 	;jmp	short K45B		; HANDLE WITH REST OF LETTER KEYS
  1332 00001596 74AF                <1> 	je	short K45B		
  1333                              <1> 	;
  1334                              <1> 	;-----	MUST BE F11 OR F12 
  1335                              <1> K53:					; F1 - F10 COME HERE, TOO
  1336 00001598 F6C303              <1> 	test	bl, LEFT_SHIFT+RIGHT_SHIFT ; TEST SHIFT STATE
  1337 0000159B 74E1                <1> 	jz	short K49		; JUMP, LOWER CASE PSEUDO SC'S
  1338                              <1> 		; 20/02/2015 
  1339 0000159D BB[90660000]        <1> 	mov	ebx, K11		; UPPER CASE PSEUDO SCAN CODES
  1340 000015A2 EB10                <1> 	jmp	short K64		; TRANSLATE SCAN
  1341                              <1> 	;
  1342                              <1> 	;-----	TRANSLATE THE CHARACTER
  1343                              <1> K56:					; TRANSLATE-CHAR
  1344 000015A4 FEC8                <1> 	dec	al			; CONVERT ORIGIN
  1345 000015A6 D7                  <1> 	xlat    			; CONVERT THE SCAN CODE TO ASCII
  1346 000015A7 F605[EC660000]02    <1> 	test	byte [KB_FLAG_3], LC_E0	; IS THIS A NEW KEY?
  1347 000015AE 7416                <1> 	jz	short K57		; NO, GO FILL BUFFER
  1348 000015B0 B4E0                <1> 	mov	ah, MC_E0		; YES, PUT SPECIAL MARKER IN AH
  1349 000015B2 EB12                <1> 	jmp	short K57		; PUT IT INTO THE BUFFER	
  1350                              <1> 	;
  1351                              <1> 	;-----	TRANSLATE SCAN FOR PSEUDO SCAN CODES
  1352                              <1> K64:					; TRANSLATE-SCAN-ORGD
  1353 000015B4 FEC8                <1> 	dec	al			; CONVERT ORIGIN
  1354 000015B6 D7                  <1>        	xlat    	                ; CTL TABLE SCAN
  1355 000015B7 88C4                <1> 	mov	ah, al			; PUT VALUE INTO AH
  1356 000015B9 B000                <1> 	mov	al, 0			; ZERO ASCII CODE
  1357 000015BB F605[EC660000]02    <1> 	test	byte [KB_FLAG_3], LC_E0	; IS THIS A NEW KEY?
  1358 000015C2 7402                <1> 	jz	short K57		; NO, GO FILL BUFFER
  1359 000015C4 B0E0                <1> 	mov	al, MC_E0		; YES, PUT SPECIAL MARKER IN AL
  1360                              <1> 	;
  1361                              <1> 	;-----	PUT CHARACTER INTO BUFFER
  1362                              <1> K57:					; BUFFER_FILL
  1363 000015C6 3CFF                <1> 	cmp	al, -1			; IS THIS AN IGNORE CHAR
  1364 000015C8 7405                <1> 	je	short K59		; YES, DO NOTHING WITH IT
  1365                              <1> 	;je	K26			; YES, DO NOTHING WITH IT
  1366 000015CA 80FCFF              <1> 	cmp	ah, -1			; LOOK FOR -1 PSEUDO SCAN
  1367                              <1>         ;;jne	short K61		; NEAR_INTERRUPT_RETURN
  1368                              <1> 	;je	K26			; INTERRUPT_RETURN
  1369                              <1> 	; 12/04/2021
  1370 000015CD 7505                <1>         jne	short _K60		; NEAR_INTERRUPT_RETURN
  1371                              <1> K59:					; NEAR_INTERRUPT_RETURN
  1372 000015CF E975FDFFFF          <1> 	jmp	K26			; INTERRUPT_RETURN
  1373                              <1> 
  1374                              <1> _K60: ; 29/01/2016
  1375 000015D4 80FC68              <1> 	cmp	ah, 68h	; ALT + F1 key
  1376 000015D7 721D                <1> 	jb	short K61
  1377 000015D9 80FC6F              <1> 	cmp	ah, 6Fh ; ALT + F8 key	
  1378 000015DC 7718                <1> 	ja	short K61
  1379                              <1> 	;
  1380 000015DE 8A1D[76770100]      <1> 	mov	bl, [ACTIVE_PAGE]
  1381 000015E4 80C368              <1> 	add	bl, 68h
  1382 000015E7 38E3                <1> 	cmp	bl, ah
  1383 000015E9 740B                <1> 	je	short K61
  1384                              <1> 	; 24/07/2022
  1385                              <1> 	;push	ax
  1386 000015EB 50                  <1> 	push	eax
  1387 000015EC 88E0                <1> 	mov	al, ah
  1388 000015EE 2C68                <1> 	sub	al, 68h
  1389 000015F0 E850090000          <1> 	call	set_active_page
  1390 000015F5 58                  <1> 	pop	eax
  1391                              <1> 	;pop	ax
  1392                              <1> K61:					; NOT-CAPS-STATE
  1393 000015F6 8B1D[FA660000]      <1> 	mov	ebx, [BUFFER_TAIL] 	; GET THE END POINTER TO THE BUFFER
  1394 000015FC 89DE                <1> 	mov	esi, ebx		; SAVE THE VALUE
  1395 000015FE E8B5FAFFFF          <1> 	call	_K4			; ADVANCE THE TAIL
  1396 00001603 3B1D[F6660000]      <1> 	cmp	ebx, [BUFFER_HEAD] 	; HAS THE BUFFER WRAPPED AROUND
  1397 00001609 740E                <1> 	je	short K62		; BUFFER_FULL_BEEP
  1398 0000160B 668906              <1> 	mov	[esi], ax		; STORE THE VALUE
  1399 0000160E 891D[FA660000]      <1> 	mov	[BUFFER_TAIL], ebx 	; MOVE THE POINTER UP
  1400 00001614 E930FDFFFF          <1> 	jmp	K26
  1401                              <1> 	;;cli				; TURN OFF INTERRUPTS
  1402                              <1> 	;;mov	al, EOI			; END OF INTERRUPT COMMAND
  1403                              <1> 	;;out	INTA00, al		; SEND COMMAND TO INTERRUPT CONTROL PORT
  1404                              <1> 	;mov	al, ENA_KBD		; INSURE KEYBOARD IS ENABLED
  1405                              <1> 	;call	SHIP_IT			; EXECUTE ENABLE
  1406                              <1> 	;mov	ax, 9102h		; MOVE IN POST CODE & TYPE
  1407                              <1> 	;int	15h			; PERFORM OTHER FUNCTION
  1408                              <1> 	;;and	byte [KB_FLAG_3],~(LC_E0+LC_E1) ; RESET LAST CHAR H.C. FLAG
  1409                              <1> 	;jmp	K27A			; INTERRUPT_RETURN
  1410                              <1> 	;;jmp   K27                    
  1411                              <1> 	;
  1412                              <1> 	;-----	BUFFER IS FULL SOUND THE BEEPER
  1413                              <1> K62:
  1414 00001619 B020                <1> 	mov	al, EOI			; ENABLE INTERRUPT CONTROLLER CHIP
  1415 0000161B E620                <1> 	out	INTA00, al
  1416 0000161D 66B9A602            <1> 	mov	cx, 678			; DIVISOR FOR 1760 HZ
  1417 00001621 B304                <1> 	mov	bl, 4			; SHORT BEEP COUNT (1/16 + 1/64 DELAY)
  1418 00001623 E8420D0000          <1> 	call	beep			; GO TO COMMON BEEP HANDLER
  1419 00001628 E928FDFFFF          <1> 	jmp     K27			; EXIT   
  1420                              <1> 
  1421                              <1> SHIP_IT:
  1422                              <1> 	;---------------------------------------------------------------------------------
  1423                              <1> 	; SHIP_IT
  1424                              <1> 	;	THIS ROUTINES HANDLES TRANSMISSION OF COMMAND AND DATA BYTES
  1425                              <1> 	;	TO THE KEYBOARD CONTROLLER.
  1426                              <1> 	;---------------------------------------------------------------------------------
  1427                              <1> 	;
  1428                              <1> 	
  1429                              <1> 	;push	ax			; SAVE DATA TO SEND
  1430                              <1> 	; 12/04/2021
  1431 0000162D 50                  <1> 	push	eax
  1432                              <1> 
  1433                              <1> 	;-----	WAIT FOR COMMAND TO ACCEPTED
  1434 0000162E FA                  <1> 	cli				; DISABLE INTERRUPTS TILL DATA SENT
  1435                              <1> 	; xor	ecx, ecx		; CLEAR TIMEOUT COUNTER
  1436 0000162F B900000100          <1> 	mov	ecx, 10000h			
  1437                              <1> S10:
  1438 00001634 E464                <1> 	in	al, STATUS_PORT		; READ KEYBOARD CONTROLLER STATUS
  1439 00001636 A802                <1> 	test	al, INPT_BUF_FULL	; CHECK FOR ITS INPUT BUFFER BUSY
  1440 00001638 E0FA                <1> 	loopnz	S10			; WAIT FOR COMMAND TO BE ACCEPTED
  1441                              <1> 
  1442                              <1> 	;pop	ax			; GET DATA TO SEND
  1443                              <1> 	; 12/04/2021
  1444 0000163A 58                  <1> 	pop	eax
  1445                              <1> 
  1446 0000163B E664                <1> 	out	STATUS_PORT, al		; SEND TO KEYBOARD CONTROLLER
  1447 0000163D FB                  <1> 	sti				; ENABLE INTERRUPTS AGAIN
  1448 0000163E C3                  <1> 	retn				; RETURN TO CALLER
  1449                              <1> 
  1450                              <1> 	; 12/04/2021 (32 bit push/pop)
  1451                              <1> SND_DATA:
  1452                              <1> 	; ---------------------------------------------------------------------------------
  1453                              <1> 	; SND_DATA
  1454                              <1> 	;	THIS ROUTINES HANDLES TRANSMISSION OF COMMAND AND DATA BYTES
  1455                              <1> 	;	TO THE KEYBOARD AND RECEIPT OF ACKNOWLEDGEMENTS. IT ALSO
  1456                              <1> 	;	HANDLES ANY RETRIES IF REQUIRED
  1457                              <1> 	; ---------------------------------------------------------------------------------
  1458                              <1> 	;
  1459 0000163F 50                  <1> 	push	eax ; push ax		; SAVE REGISTERS
  1460 00001640 53                  <1> 	push	ebx ; push bx
  1461 00001641 51                  <1> 	push	ecx
  1462 00001642 88C7                <1> 	mov	bh, al			; SAVE TRANSMITTED BYTE FOR RETRIES
  1463 00001644 B303                <1> 	mov	bl, 3			; LOAD RETRY COUNT
  1464                              <1> SD0:
  1465 00001646 FA                  <1> 	cli				; DISABLE INTERRUPTS
  1466 00001647 8025[EB660000]CF    <1> 	and	byte [KB_FLAG_2], ~(KB_FE+KB_FA) ; CLEAR ACK AND RESEND FLAGS
  1467                              <1> 	;
  1468                              <1> 	;-----	WAIT FOR COMMAND TO BE ACCEPTED
  1469 0000164E B900000100          <1> 	mov	ecx, 10000h		; MAXIMUM WAIT COUNT
  1470                              <1> SD5:
  1471 00001653 E464                <1> 	in	al, STATUS_PORT		; READ KEYBOARD PROCESSOR STATUS PORT
  1472 00001655 A802                <1> 	test	al, INPT_BUF_FULL	; CHECK FOR ANY PENDING COMMAND
  1473 00001657 E0FA                <1> 	loopnz	SD5			; WAIT FOR COMMAND TO BE ACCEPTED
  1474                              <1> 	;
  1475 00001659 88F8                <1> 	mov	al, bh			; REESTABLISH BYTE TO TRANSMIT
  1476 0000165B E660                <1> 	out	PORT_A, al		; SEND BYTE
  1477 0000165D FB                  <1> 	sti				; ENABLE INTERRUPTS
  1478                              <1> 	;mov	cx, 01A00h		; LOAD COUNT FOR 10 ms+
  1479 0000165E B9FFFF0000          <1> 	mov	ecx, 0FFFFh
  1480                              <1> SD1:
  1481 00001663 F605[EB660000]30    <1> 	test	byte [KB_FLAG_2], KB_FE+KB_FA ; SEE IF EITHER BIT SET
  1482 0000166A 750F                <1> 	jnz	short SD3		; IF SET, SOMETHING RECEIVED GO PROCESS
  1483 0000166C E2F5                <1> 	loop	SD1			; OTHERWISE WAIT
  1484                              <1> SD2:
  1485 0000166E FECB                <1> 	dec	bl			; DECREMENT RETRY COUNT
  1486 00001670 75D4                <1> 	jnz	short SD0		; RETRY TRANSMISSION
  1487 00001672 800D[EB660000]80    <1> 	or	byte [KB_FLAG_2], KB_ERR ; TURN ON TRANSMIT ERROR FLAG
  1488 00001679 EB09                <1> 	jmp	short SD4		; RETRIES EXHAUSTED FORGET TRANSMISSION
  1489                              <1> SD3:
  1490 0000167B F605[EB660000]10    <1> 	test	byte [KB_FLAG_2], KB_FA ; SEE IF THIS IS AN ACKNOWLEDGE
  1491 00001682 74EA                <1> 	jz	short SD2		; IF NOT, GO RESEND
  1492                              <1> SD4:	
  1493 00001684 59                  <1> 	pop	ecx			; RESTORE REGISTERS
  1494 00001685 5B                  <1> 	pop	ebx ; pop bx
  1495 00001686 58                  <1> 	pop	eax ; pop ax
  1496 00001687 C3                  <1> 	retn				; RETURN, GOOD TRANSMISSION
  1497                              <1> 
  1498                              <1> SND_LED:
  1499                              <1> 	; ---------------------------------------------------------------------------------
  1500                              <1> 	; SND_LED
  1501                              <1> 	;	THIS ROUTINES TURNS ON THE MODE INDICATORS.
  1502                              <1> 	;
  1503                              <1> 	;----------------------------------------------------------------------------------
  1504                              <1> 	;
  1505 00001688 FA                  <1> 	cli				; TURN OFF INTERRUPTS
  1506 00001689 F605[EB660000]40    <1> 	test	byte [KB_FLAG_2], KB_PR_LED ; CHECK FOR MODE INDICATOR UPDATE
  1507 00001690 755F                <1> 	jnz 	short SL1		; DON'T UPDATE AGAIN IF UPDATE UNDERWAY
  1508                              <1> 	;
  1509 00001692 800D[EB660000]40    <1> 	or	byte [KB_FLAG_2], KB_PR_LED ; TURN ON UPDATE IN PROCESS
  1510 00001699 B020                <1> 	mov	al, EOI			; END OF INTERRUPT COMMAND
  1511 0000169B E620                <1> 	out	20h, al ;out INTA00, al	; SEND COMMAND TO INTERRUPT CONTROL PORT
  1512 0000169D EB11                <1> 	jmp	short SL0		; GO SEND MODE INDICATOR COMMAND
  1513                              <1> SND_LED1:
  1514 0000169F FA                  <1> 	cli				; TURN OFF INTERRUPTS
  1515 000016A0 F605[EB660000]40    <1> 	test	byte [KB_FLAG_2], KB_PR_LED ; CHECK FOR MODE INDICATOR UPDATE
  1516 000016A7 7548                <1> 	jnz	short SL1		; DON'T UPDATE AGAIN IF UPDATE UNDERWAY
  1517                              <1> 	;
  1518 000016A9 800D[EB660000]40    <1> 	or	byte [KB_FLAG_2], KB_PR_LED ; TURN ON UPDATE IN PROCESS
  1519                              <1> SL0:
  1520 000016B0 B0ED                <1> 	mov	al, LED_CMD		; LED CMD BYTE
  1521 000016B2 E888FFFFFF          <1> 	call	SND_DATA		; SEND DATA TO KEYBOARD
  1522 000016B7 FA                  <1> 	cli
  1523 000016B8 E836000000          <1> 	call	MAKE_LED		; GO FORM INDICATOR DATA BYTE
  1524 000016BD 8025[EB660000]F8    <1> 	and	byte [KB_FLAG_2], 0F8h	; ~KB_LEDS ; CLEAR MODE INDICATOR BITS
  1525 000016C4 0805[EB660000]      <1> 	or	[KB_FLAG_2], al 	; SAVE PRESENT INDICATORS FOR NEXT TIME
  1526 000016CA F605[EB660000]80    <1> 	test	byte [KB_FLAG_2], KB_ERR ; TRANSMIT ERROR DETECTED
  1527 000016D1 750F                <1> 	jnz	short SL2		; IF SO, BYPASS SECOND BYTE TRANSMISSION
  1528                              <1> 	;
  1529 000016D3 E867FFFFFF          <1> 	call	SND_DATA		; SEND DATA TO KEYBOARD
  1530 000016D8 FA                  <1> 	cli				; TURN OFF INTERRUPTS
  1531 000016D9 F605[EB660000]80    <1> 	test	byte [KB_FLAG_2], KB_ERR ; TRANSMIT ERROR DETECTED
  1532 000016E0 7408                <1> 	jz	short SL3		; IF NOT, DON'T SEND AN ENABLE COMMAND
  1533                              <1> SL2:
  1534 000016E2 B0F4                <1> 	mov	al, KB_ENABLE		; GET KEYBOARD CSA ENABLE COMMAND
  1535 000016E4 E856FFFFFF          <1> 	call	SND_DATA		; SEND DATA TO KEYBOARD
  1536 000016E9 FA                  <1> 	cli				; TURN OFF INTERRUPTS
  1537                              <1> SL3:
  1538 000016EA 8025[EB660000]3F    <1> 	and	byte [KB_FLAG_2], ~(KB_PR_LED+KB_ERR) ; TURN OFF MODE INDICATOR
  1539                              <1> SL1:					; UPDATE AND TRANSMIT ERROR FLAG
  1540 000016F1 FB                  <1> 	sti				; ENABLE INTERRUPTS
  1541 000016F2 C3                  <1> 	retn				; RETURN TO CALLER
  1542                              <1> 
  1543                              <1> MAKE_LED:
  1544                              <1> 	;---------------------------------------------------------------------------------
  1545                              <1> 	; MAKE_LED
  1546                              <1> 	;	THIS ROUTINES FORMS THE DATA BYTE NECESSARY TO TURN ON/OFF
  1547                              <1> 	;	THE MODE INDICATORS.
  1548                              <1> 	;---------------------------------------------------------------------------------
  1549                              <1> 	;
  1550                              <1> 	;push 	cx			; SAVE CX
  1551 000016F3 A0[E9660000]        <1> 	mov	al, [KB_FLAG]		; GET CAPS & NUM LOCK INDICATORS
  1552 000016F8 2470                <1> 	and	al, CAPS_STATE+NUM_STATE+SCROLL_STATE ; ISOLATE INDICATORS
  1553                              <1> 	;mov	cl, 4			; SHIFT COUNT
  1554                              <1> 	;rol	al, cl			; SHIFT BITS OVER TO TURN ON INDICATORS
  1555 000016FA C0C004              <1> 	rol	al, 4 ; 20/02/2015
  1556 000016FD 2407                <1> 	and	al, 07h			; MAKE SURE ONLY MODE BITS ON
  1557                              <1> 	;pop	cx
  1558 000016FF C3                  <1> 	retn				; RETURN TO CALLER
  1559                              <1> 
  1560                              <1> ; % include 'kybdata.s'   ; KEYBOARD DATA
  1561                              <1> 
  1562                              <1> 
  1563                              <1> ; /// End Of KEYBOARD FUNCTIONS ///
  2869                                  
  2870                                  %include 'video.s' ; 07/03/2015
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel) - v2.0.7 - video.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 29/11/2023 (Previous: 07/08/2022 - Kernel v2.0.5)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 16/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Turkish Rational DOS
    11                              <1> ; Operating System Project v2.0 by ERDOGAN TAN (Beginning: 04/01/2016)
    12                              <1> ;
    13                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    14                              <1> ; video.inc (13/08/2015)
    15                              <1> ;
    16                              <1> ; Derived from 'IBM PC-AT' BIOS source code (1985) 
    17                              <1> ; ****************************************************************************
    18                              <1> 
    19                              <1> ; Retro UNIX 386 v1 Kernel - VIDEO.INC
    20                              <1> ; Last Modification: 13/08/2015
    21                              <1> ;		  (Video Data is in 'VIDATA.INC')
    22                              <1> ;
    23                              <1> ; ///////// VIDEO (CGA) FUNCTIONS ///////////////
    24                              <1> 
    25                              <1> ; 16/01/2016 (32 bit modifications, TRDOS386 - TRDOS v2.0, video.s)
    26                              <1> ; INT 31H (TRDOS 386) = INT 10H (IBM PC/AT REAL MODE)
    27                              <1> 
    28                              <1> ; IBM PC-AT BIOS Source Code
    29                              <1> ; TITLE VIDEO1 --- 06/10/85 VIDEO DISPLAY BIOS
    30                              <1> 
    31                              <1> _int10h:
    32                              <1> 	; 23/03/2016
    33                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
    34 00001700 9C                  <1> 	pushfd
    35 00001701 0E                  <1> 	push	cs
    36 00001702 E851000000          <1> 	call	VIDEO_IO_1
    37 00001707 C3                  <1> 	retn
    38                              <1> 
    39                              <1> ;--- INT 10 H -------------------------------------------------------------------
    40                              <1> ; VIDEO_IO									:
    41                              <1> ;	THESE ROUTINES PROVIDE THE CRT DISPLAY INTERFACE			:
    42                              <1> ;	THE FOLLOWING FUNCTIONS ARE PROVIDED:					:
    43                              <1> ;										:
    44                              <1> ;    (AH)= 00H	SET MODE (AL) CONTAINS MODE VALUE				:
    45                              <1> ;		(AL) = 00H  40X25 BW MODE (POWER ON DEFAULT)			:
    46                              <1> ;		(AL) = 01H  40X25 COLOR						:
    47                              <1> ;		(AL) = 02H  80X25 BW						:
    48                              <1> ;		(AL) = 03H  80X25 COLOR						:
    49                              <1> ;		              GRAPHICS MODES					:
    50                              <1> ;		(AL) = 04H  320X200 COLOR					:
    51                              <1> ;		(AL) = 05H  320X200 BW MODE					:
    52                              <1> ;		(AL) = 06H  640X200 BW MODE					:
    53                              <1> ;		(AL) = 07H   80X25 MONOCHROME (USED INTERNAL TO VIDEO ONLY)	:
    54                              <1> ;		*** NOTES -BW MODES OPERATE SAME AS COLOR MODES, BUT COLOR	:
    55                              <1> ;		           BURST IS NOT ENABLED					:
    56                              <1> ;		          -CURSOR IS NOT DISPLAYED IN GRAPHICS MODE		:
    57                              <1> ;    (AH)= 01H	SET CURSOR TYPE							:
    58                              <1> ;		(CH) = BITS 4-0 = START LINE FOR CURSOR				:
    59                              <1> ;		       ** HARDWARE WILL ALWAYS CAUSE BLINK			:
    60                              <1> ;		       ** SETTING BIT 5 OR 6 WILL CAUSE ERRATIC BLINKING	:
    61                              <1> ;		          OR NO CURSOR AT ALL					:
    62                              <1> ;		(CL) = BITS 4-0 = END LINE FOR CURSOR				:
    63                              <1> ;    (AH)= 02H	SET CURSOR POSITION						:
    64                              <1> ;		(DH,DL) = ROW,COLUMN  (00H,00H) IS UPPER LEFT			:
    65                              <1> ;		(BH) = A PAGE NUMBER (MUST BE 00H FOR GRAPHICS MODES)		:
    66                              <1> ;    (AH)= 03H	READ CURSOR POSITION						:
    67                              <1> ;		(BH) = PAGE NUMBER (MUST BE 00H FOR GRAPHICS MODES)		:
    68                              <1> ;		ON EXIT (DH,DL) = ROW,COLUMN OF CURRENT CURSOR			:
    69                              <1> ;		        (CH,CL) = CURSOR MODE CURRENTLY SET			:
    70                              <1> ;    (AH)= 04H	READ LIGHT PEN POSITION						:
    71                              <1> ;		ON EXIT:							:
    72                              <1> ;		(AH) = 00H -- LIGHT PEN SWITCH NOT DOWN/NOT TRIGGERED		:
    73                              <1> ;		(AH) = 01H -- VALID LIGHT PEN VALUE IN REGISTERS		:
    74                              <1> ;		        (DH,DL) = ROW,COLUMN OF CHARACTER LP POSITION		:
    75                              <1> ;		        (CH) = RASTER LINE (0-199)				:
    76                              <1> ;		        (BX) = PIXEL COLUMN (0-319,639)				:
    77                              <1> ;    (AH)= 05H	SELECT ACTIVE DISPLAY PAGE (VALID ONLY FOR ALPHA MODES)		:
    78                              <1> ;		(AL) = NEW PAGE VALUE (0-7 FOR MODES 0&1, 0-3 FOR MODES 2&3)	:
    79                              <1> ;    (AH)= 06H	SCROLL ACTIVE PAGE UP						:
    80                              <1> ;		(AL) = NUMBER OF LINES. ( LINES BLANKED AT BOTTOM OF WINDOW )	:
    81                              <1> ;		        (AL) = 00H MEANS BLANK ENTIRE WINDOW			:
    82                              <1> ;		(CH,CL) = ROW,COLUMN OF UPPER LEFT CORNER OF SCROLL		:
    83                              <1> ;		(DH,DL) = ROW,COLUMN OF LOWER RIGHT CORNER OF SCROLL		:
    84                              <1> ;		(BH) = ATTRIBUTE TO BE USED ON BLANK LINE			:
    85                              <1> ;    (AH)= 07H	SCROLL ACTIVE PAGE DOWN						:
    86                              <1> ;		(AL) = NUMBER OF LINES, INPUT LINES BLANKED AT TOP OF WINDOW	:
    87                              <1> ;		        (AL) = 00H MEANS BLANK ENTIRE WINDOW			:
    88                              <1> ;		(CH,CL) = ROW,COLUMN OF UPPER LEFT CORNER OF SCROLL		:
    89                              <1> ;		(DH,DL) = ROW,COLUMN OF LOWER RIGHT CORNER OF SCROLL		:
    90                              <1> ;		(BH) = ATTRIBUTE TO BE USED ON BLANK LINE			:
    91                              <1> ;										:
    92                              <1> ;   CHARACTER HANDLING ROUTINES							:
    93                              <1> ;										:
    94                              <1> ;    (AH)= 08H	READ ATTRIBUTE/CHARACTER AT CURRENT CURSOR POSITION		:
    95                              <1> ;		(BH) = DISPLAY PAGE (VALID FOR ALPHA MODES ONLY)		:
    96                              <1> ;		ON EXIT:							:
    97                              <1> ;		(AL) = CHAR READ						:
    98                              <1> ;		(AH) = ATTRIBUTE OF CHARACTER READ (ALPHA MODES ONLY)		:
    99                              <1> ;    (AH)= 09H	WRITE ATTRIBUTE/CHARACTER AT CURRENT CURSOR POSITION		:
   100                              <1> ;		(BH) = DISPLAY PAGE (VALID FOR ALPHA MODES ONLY)		:
   101                              <1> ;		(CX) = COUNT OF CHARACTERS TO WRITE				:
   102                              <1> ;		(AL) = CHAR TO WRITE						:
   103                              <1> ;		(BL) = ATTRIBUTE OF CHARACTER (ALPHA)/COLOR OF CHAR (GRAPHICS)	:
   104                              <1> ;		         SEE NOTE ON WRITE DOT FOR BIT 7 OF BL = 1.		:
   105                              <1> ;    (AH) = 0AH	WRITE CHARACTER ONLY AT CURRENT CURSOR POSITION			:
   106                              <1> ;		(BH) = DISPLAY PAGE (VALID FOR ALPHA MODES ONLY)		:
   107                              <1> ;		(CX) = COUNT OF CHARACTERS TO WRITE				:
   108                              <1> ;		(AL) = CHAR TO WRITE						:
   109                              <1> ;		       NOTE: USE FUNCTION (AH)= 09H IN GRAPHICS MODES		:
   110                              <1> ;	FOR READ/WRITE CHARACTER INTERFACE WHILE IN GRAPHICS MODE, THE		:
   111                              <1> ;		CHARACTERS ARE FORMED FROM A CHARACTER GENERATOR IMAGE		:
   112                              <1> ;		MAINTAINED IN THE SYSTEM ROM. ONLY THE 1ST 128 CHARS		:
   113                              <1> ;		ARE CONTAINED THERE. TO READ/WRITE THE SECOND 128 CHARS,	:
   114                              <1> ;		THE USER MUST INITIALIZE THE POINTER AT INTERRUPT 1FH		:
   115                              <1> ;		(LOCATION 0007CH) TO POINT TO THE 1K BYTE TABLE CONTAINING	:
   116                              <1> ;		THE CODE POINTS FOR THE SECOND 128 CHARS (128-255).		:
   117                              <1> ;	FOR WRITE CHARACTER INTERFACE IN GRAPHICS MODE, THE REPLICATION FACTOR	:
   118                              <1> ;		CONTAINED IN (CX) ON ENTRY WILL PRODUCE VALID RESULTS ONLY	:
   119                              <1> ;		FOR CHARACTERS CONTAINED ON THE SAME ROW. CONTINUATION TO	:
   120                              <1> ;		SUCCEEDING LINES WILL NOT PRODUCE CORRECTLY.			:
   121                              <1> ;										:
   122                              <1> ;    GRAPHICS INTERFACE								:
   123                              <1> ;    (AH)= 0BH	SET COLOR PALETTE						:
   124                              <1> ;		(BH) = PALETTE COLOR ID BEING SET (0-127)			:
   125                              <1> ;		(BL) = COLOR VALUE TO BE USED WITH THAT COLOR ID		:
   126                              <1> ;		       NOTE: FOR THE CURRENT COLOR CARD, THIS ENTRY POINT HAS	:
   127                              <1> ;		               MEANING ONLY FOR 320X200 GRAPHICS.		:
   128                              <1> ;		       COLOR ID = 0 SELECTS THE BACKGROUND COLOR (0-15)		:
   129                              <1> ;		       COLOR ID = 1 SELECTS THE PALETTE TO BE USED:		:
   130                              <1> ;		               0 = GREEN(1)/RED(2)/YELLOW(3)			:
   131                              <1> ;		               1 = CYAN(1)/MAGENTA(2)/WHITE(3)			:
   132                              <1> ;		       IN 40X25 OR 80X25 ALPHA MODES, THE VALUE SET FOR 	:
   133                              <1> ;		               PALETTE COLOR 0 INDICATES THE BORDER COLOR	:
   134                              <1> ;		               TO BE USED (VALUES 0-31, WHERE 16-31 SELECT	:
   135                              <1> ;		               THE HIGH INTENSITY BACKGROUND SET.		:
   136                              <1> ;    (AH)= 0CH	WRITE DOT							:
   137                              <1> ;		(DX) = ROW NUMBER						:
   138                              <1> ;		(CX) = COLUMN NUMBER						:
   139                              <1> ;		(AL) = COLOR VALUE						:
   140                              <1> ;		        IF BIT 7 OF AL = 1, THEN THE COLOR VALUE IS EXCLUSIVE	:
   141                              <1> ;		        ORed WITH THE CURRENT CONTENTS OF THE DOT		:
   142                              <1> ;    (AH)= ODH	READ DOT							:
   143                              <1> ;		(DX) = ROW NUMBER						:
   144                              <1> ;		(CX) = COLUMN NUMBER						:
   145                              <1> ;		(AL) = RETURNS THE DOT READ					:
   146                              <1> ;										:
   147                              <1> ;    ASCII TELETYPE ROUTINE FOR OUTPUT						:
   148                              <1> ;										:
   149                              <1> ;    (AH)= 0EH	WRITE TELETYPE TO ACTIVE PAGE					:
   150                              <1> ;		(AL) = CHAR TO WRITE						:
   151                              <1> ;		(BL) = FOREGROUND COLOR IN GRAPHICS MODE			:
   152                              <1> ;		NOTE -- SCREEN WIDTH IS CONTROLLED BY PREVIOUS MODE SET		:
   153                              <1> ;    (AH)= 0FH	CURRENT VIDEO STATE						:
   154                              <1> ;		RETURNS THE CURRENT VIDEO STATE					:
   155                              <1> ;		(AL) = MODE CURRENTLY SET ( SEE (AH)=00H FOR EXPLANATION)	:
   156                              <1> ;		(AH) = NUMBER OR CHARACTER COLUMNS ON SCREEN			:
   157                              <1> ;		(BH) = CURRENT ACTIVE DISPLAY PAGE				:
   158                              <1> ;    (AH)= 10H	RESERVED							:
   159                              <1> ;    (AH)= 11H	RESERVED							:
   160                              <1> ;    (AH)= 12H	RESERVED							:
   161                              <1> ;    (AH)= 13H	WRITE STRING							:
   162                              <1> ;			ES:BP  -  POINTER T0 STRING TO BE WRITTEN		:
   163                              <1> ;			CX     -  LENGTH OF CHARACTER STRING TO WRITTEN		:
   164                              <1> ;			DX     -  CURSOR POSITION FOR STRING TO BE WRITTEN	:
   165                              <1> ;			BH     -  PAGE NUMBER					:
   166                              <1> ;		(AL)= 00H	WRITE CHARACTER STRING				:
   167                              <1> ;			BL     -  ATTRIBUTE					:
   168                              <1> ;			STRING IS  <CHAR,CHAR, ... ,CHAR>			:
   169                              <1> ;			CURSOR NOT MOVED					:
   170                              <1> ;		(AL)= 01H	WRITE CHARACTER STRING AND MOVE CURSOR		:
   171                              <1> ;			BL     -  ATTRIBUTE					:
   172                              <1> ;			STRING IS  <CHAR,CHAR, ... ,CHAR>			:
   173                              <1> ;			CURSOR MOVED						:
   174                              <1> ;		(AL)= 02H	WRITE CHARACTER AND ATTRIBUTE STRING		:
   175                              <1> ;			       (VALID FOR ALPHA MODES ONLY)			:
   176                              <1> ;			STRING IS <CHAR,ATTR,CHAR,ATTR ..  ,CHAR,ATTR>		:
   177                              <1> ;			CURSOR IS NOT MOVED					:
   178                              <1> ;		(AL)= 03H WRITE CHARACTER AND ATTRIBUTE STRING AND MOVE CURSOR	:
   179                              <1> ;			       (VALID FOR ALPHA MODES ONLY)			:
   180                              <1> ;			STRING IS <CHAR,ATTR,CHAR,ATTR ..  ,CHAR,ATTR>		:
   181                              <1> ;			CURSOR IS MOVED						:
   182                              <1> ;		 NOTE:  CARRIAGE RETURN, LINE FEED, BACKSPACE, AND BELL ARE	:
   183                              <1> ;		        TREATED AS COMMANDS RATHER THAN PRINTABLE CHARACTERS.	:
   184                              <1> ;										:
   185                              <1> ;	BX,CX,DX,SI,DI,BP,SP,DS,ES,SS PRESERVED DURING CALLS EXCEPT FOR		:
   186                              <1> ;	BX,CX,DX RETURN VALUES ON FUNCTIONS 03H,04H,0DH AND 0FH. ON ALL CALLS	:
   187                              <1> ;	AX IS MODIFIED.								:
   188                              <1> ;--------------------------------------------------------------------------------
   189                              <1> 
   190 00001708 [D91A0000]          <1> M1:	dd	SET_MODE	; TABLE OF ROUTINES WITHIN VIDEO I/O
   191 0000170C [8F1E0000]          <1> 	dd	SET_CTYPE
   192 00001710 [BD1E0000]          <1> 	dd	SET_CPOS
   193 00001714 [E11E0000]          <1> 	dd	READ_CURSOR
   194                              <1> 	;dd	VIDEO_RETURN	; READ_LPEN
   195 00001718 [D71A0000]          <1> 	dd	set_mode_ncm	; Set mode without clearing video memory
   196 0000171C [271F0000]          <1> 	dd	ACT_DISP_PAGE
   197 00001720 [B11F0000]          <1> 	dd	SCROLL_UP
   198 00001724 [C8200000]          <1> 	dd	SCROLL_DOWN
   199 00001728 [47210000]          <1> 	dd	READ_AC_CURRENT
   200 0000172C [A4210000]          <1> 	dd	WRITE_AC_CURRENT
   201 00001730 [CA210000]          <1> 	dd	WRITE_C_CURRENT
   202 00001734 [D22A0000]          <1> 	dd	SET_COLOR
   203 00001738 [3A2B0000]          <1> 	dd	WRITE_DOT
   204 0000173C [092B0000]          <1> 	dd	READ_DOT
   205 00001740 [54220000]          <1> 	dd	WRITE_TTY
   206 00001744 [BF1A0000]          <1> 	dd	VIDEO_STATE
   207 00001748 [07360000]          <1> 	dd	vga_pal_funcs	; 10/08/2016 (TRDOS 386)
   208 0000174C [1F300000]          <1> 	dd	font_setup	; 10/07/2016 (TRDOS 386)
   209 00001750 [0E1B0000]          <1> 	dd	VIDEO_RETURN	; RESERVED
   210 00001754 [CA230000]          <1> 	dd	WRITE_STRING	; 23/06/2016 (TRDOS 386)
   211                              <1> M1L	EQU	$ - M1
   212                              <1> 
   213                              <1> ; 29/11/2023 - TRDOS 386 v2.0.7
   214                              <1> ;	[VESA VBE3-PMI functions]
   215                              <1> ;	(fixing page table problems for LFB/PMI for >2.5GB main memory)
   216                              <1> ;	((Addresses of kernel page tables and PMI videobios address
   217                              <1> ;	  must be < 4MB or cr3 register must contain kernel's page dir
   218                              <1> ;	  during video interrupt. Save-change-restore cr3 register
   219                              <1> ;	  content here is a bugfix method to prevent page faults 
   220                              <1> ;	  for -real- computers with >2.5GB main memory.))
   221                              <1> ;	 {INT 31h was not changing cr3 while it contains user's
   222                              <1> ;	  page directory addr and accessing beyond of the 1st 4MB was
   223                              <1> ;	  causing to page faults.. because, after the 1st 4MB, user's
   224                              <1> ;	  page tables contain non-linear/virtual memory pages.}
   225                              <1> ;
   226                              <1> ; 02/08/2022 - TRDOS 386 v2.0.5
   227                              <1> ; 06/12/2020
   228                              <1> ; 05/12/2020
   229                              <1> ; 03/12/2020
   230                              <1> ; 27/11/2020 - TRDOS 386 v2.0.3
   231                              <1> ; 14/01/2017
   232                              <1> ; 02/01/2017
   233                              <1> ; 04/07/2016
   234                              <1> ; 12/05/2016
   235                              <1> ; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
   236                              <1> int31h:  ; Video BIOS
   237                              <1> 
   238                              <1> ; BH = Video page number
   239                              <1> ; BL = Color/Attribute
   240                              <1> ; AH = Function number
   241                              <1> ; AL = Character
   242                              <1> 
   243                              <1> VIDEO_IO_1:
   244                              <1> 	;sti				; INTERRUPTS BACK ON
   245 00001758 FC                  <1> 	cld				; SET DIRECTION FORWARD
   246                              <1> 	
   247                              <1> 	;cmp	ah, M1L/4		; TEST FOR WITHIN TABLE RANGE
   248                              <1> 	;jnb	short M4		; BRANCH TO EXIT IF NOT A VALID COMMAND
   249                              <1> 
   250                              <1> 	; 26/11/2020
   251 00001759 80FC14              <1> 	cmp	ah, M1L/4
   252 0000175C 7205                <1> 	jb	short VGA_func
   253                              <1> 
   254 0000175E 80FC4F              <1> 	cmp	ah, 4Fh
   255 00001761 7532                <1> 	jne	short M4 ; invalid !
   256                              <1> 
   257                              <1> VGA_func: ; 26/11/2020
   258 00001763 06                  <1> 	push	es ; *
   259 00001764 1E                  <1> 	push	ds ; **			; SAVE WORK AND PARAMETER REGISTERS
   260                              <1> 
   261                              <1> 	; 26/11/2020
   262 00001765 50                  <1> 	push	eax ; -
   263                              <1> 	
   264 00001766 66B81000            <1> 	mov	ax, KDATA 		; POINT DS: TO DATA SEGMENT
   265 0000176A 8ED8                <1> 	mov	ds, ax
   266 0000176C 8EC0                <1> 	mov	es, ax
   267                              <1> 
   268                              <1> 	; 26/11/2020
   269 0000176E 58                  <1> 	pop	eax ; +
   270                              <1> 	;
   271 0000176F FB                  <1> 	sti
   272 00001770 80FC4F              <1> 	cmp	ah, 4Fh
   273 00001773 747A                <1> 	je	short VBE_func
   274                              <1> 
   275                              <1> 	; 04/12/2020
   276 00001775 A3[CC830100]        <1> 	mov	[video_eax], eax
   277                              <1> 
   278                              <1> 	; 21/12/2020
   279 0000177A 803D[1E670000]FF    <1> 	cmp	byte [CRT_MODE], 0FFh	; Current mode is a VESA VBE mode ?
   280 00001781 7213                <1> 	jb	short VGA_func_std
   281                              <1> 
   282 00001783 08E4                <1> 	or	ah, ah			; set mode ?
   283 00001785 750F                <1> 	jnz	short VGA_func_std	; no
   284                              <1> 
   285 00001787 803D[64090000]03    <1> 	cmp	byte [vbe3], 3		; (real) VESA VBE 3 video bios ?
   286 0000178E 7506                <1> 	jne	short VGA_func_std	; no
   287                              <1> 
   288 00001790 E995010000          <1> 	jmp	vesa_vbe3_pmi
   289                              <1> 
   290                              <1> 	; 21/12/2020
   291                              <1> M4:					; COMMAND NOT VALID
   292 00001795 CF                  <1> 	iretd				; DO NOTHING IF NOT IN VALID RANGE
   293                              <1> 
   294                              <1> VGA_func_std:
   295                              <1> 	; 06/12/2020
   296                              <1> 	; 03/12/2020
   297 00001796 80FC0F              <1> 	cmp	ah, 0Fh
   298 00001799 773D                <1> 	ja	short VGA_funcs_0	; only CGA funcs will be handled by	
   299                              <1> 	; 06/12/2020			; vga bios firmware
   300                              <1> 	; 03/12/2020			
   301                              <1> 	;test	ah, 7Fh ; set mode ?
   302                              <1> 	;;or	ah, ah			; only 'set mode' will be handled by
   303                              <1> 	;jnz	short VGA_funcs_0	; vga bios firmware	
   304                              <1> 	;jz	short vbe_pmi32_0
   305                              <1> 
   306                              <1> 	; 28/11/2020
   307 0000179B 803D[D00F0300]00    <1> 	cmp	byte [pmi32], 0		; 32 bit protected mode interface for
   308 000017A2 7634                <1> 	jna	short VGA_funcs_0	; video hardware's vga bios firmware
   309                              <1> 					; ([pmi32] > 0 if it is activated)
   310                              <1> 					; note:
   311                              <1> 					; [vbe3] = 3 is required to activate
   312                              <1> 	; 07/12/2020
   313 000017A4 20E4                <1> 	and	ah, ah ; is this set mode ?
   314 000017A6 7413                <1> 	jz	short vbe_pmi32_2 ; yes
   315                              <1> 
   316 000017A8 80FC04              <1> 	cmp	ah, 04h	 ; set mode ('no clear memory' option)
   317 000017AB 742B                <1> 	je	short VGA_funcs_0
   318                              <1> 
   319                              <1> 	; 07/12/2020
   320 000017AD 803D[1E670000]07    <1> 	cmp	byte [CRT_MODE], 7 ; current mode > 7 ?
   321 000017B4 7622                <1> 	jna	short VGA_funcs_0  ; no	
   322                              <1> 
   323                              <1> 	; when mode 3 is active, 
   324                              <1> 	; video bios functions are not redirected
   325                              <1> 	; to VESA VBE3 PMI except 'set mode' function
   326                              <1> 
   327                              <1> vbe_pmi32_0:
   328                              <1> 	; 06/12/2020
   329                              <1> 	;or	ah, ah
   330                              <1> 	;jnz	short vbe_pmi32_2
   331                              <1> 	; ah = 0 ; 'set mode'
   332                              <1> 	;cmp	al, 3 ; 80x25 text mode, 16 colors, default mode for MainProg
   333                              <1> 	;jne	short vbe_pmi32_1
   334                              <1> 	;cmp	byte [CRT_MODE], 3 ; If current video mode <> 3 and requested
   335                              <1> 	;			; video mode is 3, use internal 'set mode';
   336                              <1> 	;			; otherwise, use vesa vbe 3 bios's 'set mode'.
   337                              <1> 	;jne	short VGA_funcs_0
   338                              <1> vbe_pmi32_1:
   339 000017B6 E96F010000          <1> 	jmp	vesa_vbe3_pmi
   340                              <1> ;vbe_pmi32_2:
   341                              <1> 	;cmp	ah, 04h ; set mode (no clear mem option)
   342                              <1> 	;jne	short vbe_pmi32_1
   343                              <1> 
   344                              <1> vbe_pmi32_2:
   345                              <1> 	; 07/12/2020
   346 000017BB 803D[1E670000]07    <1> 	cmp	byte [CRT_MODE], 7 ; current mode > 7 ?
   347 000017C2 77F2                <1> 	ja	short vbe_pmi32_1  ; yes
   348                              <1> 
   349 000017C4 3C07                <1> 	cmp	al, 7	; requested mode > 7 ?
   350 000017C6 7610                <1> 	jna	short VGA_funcs_0  ; no (CGA)
   351                              <1> 
   352 000017C8 3C13                <1> 	cmp	al, 13h
   353 000017CA 76EA                <1> 	jna	short vbe_pmi32_1
   354                              <1> 
   355 000017CC A880                <1> 	test	al, 80h
   356 000017CE 7408                <1> 	jz	short VGA_funcs_0  ; unknown or special
   357                              <1> 
   358 000017D0 3C87                <1> 	cmp	al, 87h	; requested mode > 7 ? 
   359                              <1> 			; (with no clear mem ops)
   360 000017D2 7604                <1> 	jna	short VGA_funcs_0  ; no (CGA)
   361                              <1> 
   362 000017D4 3C93                <1> 	cmp	al, 93h
   363 000017D6 76DE                <1> 	jna	short vbe_pmi32_1
   364                              <1> 
   365                              <1> 	; > 13h video modes are unknown or special
   366                              <1>  	; they must be handled by kernel	
   367                              <1> 
   368                              <1> 	; CGA video modes will be handled by kernel
   369                              <1> 
   370                              <1> VGA_funcs_0:
   371 000017D8 52                  <1> 	push	edx ; ***
   372 000017D9 51                  <1> 	push	ecx ; ****
   373 000017DA 53                  <1> 	push	ebx ; *****
   374 000017DB 56                  <1> 	push	esi ; ******
   375 000017DC 57                  <1> 	push	edi ; *******
   376 000017DD 55                  <1> 	push	ebp ; ********
   377                              <1> 
   378                              <1> 	;mov	[video_eax], eax ; 12/05/2016 
   379 000017DE BF00800B00          <1> 	mov	edi, 0B8000h		; GET offset FOR COLOR CARD
   380                              <1> 
   381                              <1> 	; 23/03/2016
   382 000017E3 C0E402              <1> 	shl	ah, 2  ; dword		; TIMES 2 FOR WORD TABLE LOOKUP
   383 000017E6 0FB6F4              <1> 	movzx	esi, ah			; MOVE OFFSET INTO LOOK UP REGISTER (SI)
   384                              <1> 	;mov	ah, [CRT_MODE]		; MOVE CURRENT MODE INTO (AH) REGISTER
   385                              <1> 
   386                              <1> 	;;15/01/2017
   387                              <1> 	; 14/01/2017
   388                              <1> 	; 02/01/2017
   389                              <1> 	;;mov	byte [intflg], 31h  ; video interrupt
   390                              <1> 	;sti ; 26/11/2020
   391                              <1> 	;
   392                              <1> 
   393 000017E9 FFA6[08170000]      <1> 	jmp	dword [esi+M1]		; GO TO SELECTED FUNCTION
   394                              <1> 
   395                              <1> VBE_func:
   396                              <1> 	; 26/11/2020
   397                              <1> 	;sti
   398 000017EF 55                  <1> 	push	ebp ; *** ; 27/11/2020	
   399 000017F0 56                  <1> 	push	esi ; **** 
   400                              <1> 	
   401                              <1> 	; Note:
   402                              <1> 	; ebx, ecx, edx, edi, ebp registers
   403                              <1> 	; must be saved by VBE functions and
   404                              <1> 	; eax register must be set
   405                              <1> 	; (according to VBE 3 standard)
   406                              <1> 	; before return from this interrupt
   407                              <1> 	; (every function must restore and set
   408                              <1> 	; registers except esp, esi, es, ds)
   409                              <1> 
   410                              <1> 	; 29/11/2023 - TRDOS 386 v2.0.7
   411 000017F1 0F20DE              <1> 	mov	esi, cr3
   412 000017F4 56                  <1> 	push	esi ; *****
   413                              <1> 	;cmp	esi, [k_page_dir]
   414                              <1> 	;je	short VBE_func_x
   415 000017F5 8B35[48770100]      <1> 	mov	esi, [k_page_dir]
   416 000017FB 0F22DE              <1> 	mov	cr3, esi
   417                              <1> ;VBE_func_x:
   418 000017FE 803D[64090000]02    <1> 	cmp	byte [vbe3], 2
   419 00001805 7744                <1> 	ja	short VESA_VBE3_PMI_CALL ; VBE3 video bios ('PMID')
   420                              <1> 	;je	short VBE_func_0  ; Bochs/Qemu/VirtualBox emulator
   421 00001807 726C                <1> 	jb	short VBE_unknown ; invalid ([vbe3] = 0)
   422                              <1> 
   423                              <1> 	;jmp	VESA_VBE3_PMI_CALL
   424                              <1> 
   425                              <1> VBE_func_0:	
   426                              <1> 	; Bochs/Plex86 VGAbios VBE extension
   427                              <1> 	; (TRDOS 386 v2.0.3 can use VBE graphics modes on emulators)
   428                              <1> 	; BOCHS/QEMU/VIRTUALBOX
   429                              <1>  
   430 00001809 8A25[65090000]      <1> 	mov	ah, [vbe2bios]
   431 0000180F 80FCC0              <1> 	cmp	ah, 0C0h		
   432 00001812 7261                <1> 	jb	short VBE_unknown 	
   433 00001814 80FCC5              <1> 	cmp	ah, 0C5h
   434 00001817 775C                <1> 	ja	short VBE_unknown
   435                              <1> 
   436                              <1> 	; TRDOS 386 is running on BOCHS or QEMU
   437 00001819 B44F                <1> 	mov	ah, 4Fh
   438                              <1> VBE_func_1:
   439 0000181B 0FB6F0              <1> 	movzx	esi, al ; VESA VBE function number
   440                              <1> 	;shl	si, 2 ; dword
   441                              <1> 	; 02/08/2022
   442 0000181E C1E602              <1> 	shl	esi, 2
   443 00001821 6683FE14            <1> 	cmp	si, N1L
   444 00001825 734E                <1> 	jnb	short VBE_unknown
   445                              <1> 	;sti
   446                              <1> 	
   447 00001827 FF96[37180000]      <1> 	call	dword [esi+N1] ; call VBE function
   448                              <1> 		
   449                              <1> 	;jmp	short VBE_bios_return
   450                              <1> 
   451                              <1> VBE_bios_return:
   452 0000182D FA                  <1> 	cli
   453                              <1> 	; 29/11/2023 - TRDOS 386 v2.0.7
   454 0000182E 5E                  <1> 	pop	esi ; *****
   455                              <1> 	;cmp	esi, [k_page_dir]
   456                              <1> 	;je	short VBE_bios_return_x
   457 0000182F 0F22DE              <1> 	mov	cr3, esi
   458                              <1> ;VBE_bios_return_x:	
   459 00001832 5E                  <1> 	pop	esi ; ****
   460 00001833 5D                  <1> 	pop	ebp ; *** ; 27/11/2020
   461 00001834 07                  <1> 	pop	es  ; **
   462 00001835 1F                  <1> 	pop	ds  ; *
   463 00001836 CF                  <1> 	iretd
   464                              <1> 
   465                              <1> 	; 26/11/2020
   466                              <1> N1:
   467 00001837 [98180000]          <1> 	dd	vbe_biosfn_return_ctrl_info
   468 0000183B [BF380000]          <1> 	dd	vbe_biosfn_return_mode_info
   469 0000183F [79390000]          <1> 	dd	vbe_biosfn_set_mode
   470 00001843 [493A0000]          <1> 	dd	vbe_biosfn_return_current_mode
   471 00001847 [683A0000]          <1> 	dd	vbe_biosfn_save_restore_state
   472                              <1> 	;dd	vbe_biosfn_display_window_ctrl
   473                              <1> 	;dd	vbe_biosfn_set_get_log_scanline
   474                              <1> 	;dd	vbe_biosfn_set_get_disp_start
   475                              <1> 	;dd	vbe_biosfn_set_get_dac_pal_frm
   476                              <1> 	;dd	vbe_biosfn_set_get_palette_data
   477                              <1> 	
   478                              <1> N1L	EQU	$ - N1
   479                              <1> 
   480                              <1> 
   481                              <1> VESA_VBE3_PMI_CALL: ; VESA VBE video bios (firmware) functions
   482                              <1> 		    ; by using VESA VBE3 Protected Mode Interface
   483                              <1> 	
   484                              <1> 	; 02/08/2022 - TRDOS 386 v2.0.5
   485                              <1> 	; 29/11/2020
   486                              <1> 	; 26/11/2020 - TRDOS 386 v2.0.3 video.s
   487                              <1> 
   488                              <1> 	; We are here because..
   489                              <1> 	; 'PMID' has been verified by TRDOS 386 v2.0.3 kernel.
   490                              <1> 	; (Otherwise bochs/plex86 compatible VBE functions and
   491                              <1> 	;  modes would be used on BOCHS/QEMU/VIRTUALBOX emulators
   492                              <1> 	;  or only standard/old VGA graphics modes would be used.)
   493                              <1> 
   494                              <1> 	; (TRDOS 386 v2.0.3 can use VESA VBE graphics modes if
   495                              <1> 	;  the video bios is full compatible with VBE3 standard) 
   496                              <1> 
   497                              <1> 	; 29/11/2020
   498                              <1> 
   499 0000184B 0FB6F0              <1> 	movzx	esi, al ; VESA VBE 3 function number
   500                              <1> 	;shl	si, 2 ; dword
   501                              <1> 	; 02/08/2022
   502 0000184E C1E602              <1> 	shl	esi, 2
   503 00001851 6683FE14            <1> 	cmp	si, P1L
   504 00001855 731E                <1> 	jnb	short VBE_unknown
   505                              <1> 	;sti
   506                              <1> 
   507 00001857 57                  <1> 	push	edi ; *****
   508                              <1> 
   509 00001858 FF96[61180000]      <1> 	call	dword [esi+P1] ; call VBE 3 function
   510                              <1> 
   511 0000185E 5F                  <1> 	pop	edi ; *****
   512                              <1> 		
   513 0000185F EBCC                <1> 	jmp	short VBE_bios_return
   514                              <1> 
   515                              <1> P1:
   516 00001861 [7B180000]          <1> 	dd	vbe3_pmfn_return_ctrl_info
   517 00001865 [9E180000]          <1> 	dd	vbe3_pmfn_return_mode_info
   518 00001869 [DA180000]          <1> 	dd	vbe3_pmfn_set_mode
   519 0000186D [D5180000]          <1> 	dd	vbe3_pmfn_return_current_mode
   520 00001871 [E3190000]          <1> 	dd	vbe3_pmfn_save_restore_state
   521                              <1> 	;dd	vbe3_pmfn_display_window_ctrl
   522                              <1> 	;dd	vbe3_pmfn_set_get_log_scanline
   523                              <1> 	;dd	vbe3_pmfn_set_get_disp_start
   524                              <1> 	;dd	vbe3_pmfn_set_get_dac_pal_frm
   525                              <1> 	;dd	vbe3_pmfn_set_get_palette_data
   526                              <1> 	;dd	vbe3_pmfn_return_pmi ; invalid for TRDOS 386 v2
   527                              <1> 	;dd	vbe3_pmfn_set_get_pixel_clock
   528                              <1> 	
   529                              <1> P1L	EQU	$ - P1
   530                              <1> 
   531                              <1> ;	; 29/11/2020
   532                              <1> ;	mov	edi, VBE3MODEINFOBLOCK >> 4 ; / 16
   533                              <1> ;	
   534                              <1> ;	cmp	al, 04h
   535                              <1> ;	jb	short vbe3_pm_f ; function: 4F00h to 4F03h
   536                              <1> ;	ja	short vbe3_pmi_f5B ; function: 4F05h to 4F0Bh
   537                              <1> ;
   538                              <1> ;	; check buffer length (must be <= 2048 bytes)
   539                              <1> ;
   540                              <1> ;	and	dl, dl ; 0
   541                              <1> ;	jz	short vbe3_pm_f 
   542                              <1> ;		       ; Return Save/Restore State buffer size
   543                              <1> ;
   544                              <1> ;	push	ebx  ; buffer address
   545                              <1> ;	push	edx  ; function: save (01h) or restore (02h)
   546                              <1> ;	call	
   547                              <1> ;
   548                              <1> ;vbe3_pm_f03:
   549                              <1> ;	cmp	al, 2
   550                              <1> ;	ja	short vbe3_pm_f ; function 4F03h
   551                              <1> ;	jb	short vbe3_pm_f1
   552                              <1> ;
   553                              <1> ;
   554                              <1> ;vbe3_pm_f1:
   555                              <1> ;	
   556                              <1> ;
   557                              <1> ;vbe3_pmi_f5B:
   558                              <1> ;	cmp	al, 09h
   559                              <1> ;	jna	short vbe3_pm_f ; funcs 05h to 09h are usable 
   560                              <1> ;	
   561                              <1> ;	cmp	al, 0Bh ; Get/Set pixel clock, last function
   562                              <1> ;	jne	short VBE_unknown 
   563                              <1> ;			; (do not use 'uncertain' functions
   564                              <1> ;			; because of system-user buff transfers)
   565                              <1> ;vbe3_pm_f:
   566                              <1> ;	mov	byte [vbe3_pm_fn], al	; set
   567                              <1> ;	; prepare 16 bit pm segments & registers for pmi call 
   568                              <1> ;	call	VESA_VBE3_PM_FUNCTION
   569                              <1> ;
   570                              <1> ;
   571                              <1> 
   572                              <1> 	; 26/11/2020
   573                              <1> VBE_unknown:
   574 00001875 66B80001            <1> 	mov	ax, 0100h  ; ah = 1 : Function call failed	
   575                              <1> 			   ; al = 0 : Function is not supported	
   576                              <1> 	
   577 00001879 EBB2                <1> 	jmp	short VBE_bios_return
   578                              <1> 
   579                              <1> vbe3_pmfn_return_ctrl_info:
   580                              <1> 	; 02/08/2022 (TRDOS 386 Kernel v2.0.5)
   581                              <1> 	; 12/12/2020
   582                              <1> 	;
   583                              <1> 	; VBE function 4F00h - Return VBE Controller Information
   584                              <1> 	;
   585                              <1> 	; Input:
   586                              <1> 	;      EDI = Pointer to buffer in which to place
   587                              <1> 	;	     VbeInfoBlock structure
   588                              <1> 	;
   589                              <1> 	;	AX = 4F00h
   590                              <1> 	; Output:
   591                              <1> 	;	AX = VBE return status
   592                              <1> 	;	     AX = 004Fh -> succeeded
   593                              <1> 	;	     AX <> 004Fh -> failed
   594                              <1> 	; 
   595                              <1> 	; Modified registers: eax (+ edi for kernel's own call)
   596                              <1> 
   597                              <1> 	; NOTE: TRDOS 386 v2 (v2.0.3) kernel calls this function
   598                              <1> 	; during startup while cpu is in real mode
   599                              <1> 	; (by using int 10h, 4F02h) and saves VbeInfoBlock at
   600                              <1> 	; VBE3INFOBLOCK address (97E00h for TRDOS 386 v2.0.3).
   601                              <1> 	;	
   602                              <1> 	; So...
   603                              <1> 	; This VBE function is adjusted to return/move same info
   604                              <1> 	; from VBE3INFOBLOCK to user's buffer in EDI.
   605                              <1> 
   606                              <1> 	; int 31h (int 10h) entrance
   607                              <1> 
   608 0000187B 21FF                <1> 	and	edi, edi
   609 0000187D 7423                <1> 	jz	short vbe3_func_fail ; invalid buffer address !
   610                              <1> 
   611                              <1> ;_vbe3_pmfn_return_ctrl_info:		
   612                              <1> 	;or	edi, edi
   613                              <1> 	;jnz	short _vbe_biosfn_return_ctrl_info
   614                              <1> 	;
   615                              <1> 	;; this option may not be necessary - 12/12/2020
   616                              <1> 	;
   617                              <1> 	;; edi = 0, kernel forces to get ctrl info again
   618                              <1> 	;;	   by using VESA VBE3 video bios's pmi
   619                              <1> 	;
   620                              <1> 	;;push	edi
   621                              <1> 	;; far call to VESA VBE3 PMI 
   622                              <1> 	;;mov	ax, 4F00h ; Return VBE Controller Info
   623                              <1> 	;mov	edi, VBE3INFOBLOCK-VBE3SAVERESTOREBLOCK
   624                              <1> 	;; ES selector base address = VBE3SAVERESTOREBLOCK 
   625                              <1> 	;call	int10h_32bit_pmi
   626                              <1> 	;;pop	edi
   627                              <1> 	;mov	edi, VBE3INFOBLOCK ; retn to the kernel sub
   628                              <1> 	;cmp	ax, 004Fh
   629                              <1> 	;je	short vbe_ctrl_info_retn
   630                              <1> 	;stc	
   631                              <1> 	;retn
   632                              <1> 
   633                              <1> _vbe_biosfn_return_ctrl_info:
   634 0000187F 57                  <1> 	push	edi
   635 00001880 51                  <1> 	push	ecx
   636 00001881 BE007E0900          <1> 	mov	esi, VBE3INFOBLOCK
   637                              <1> 	;mov	ecx, 512
   638                              <1> 	; 02/08/2022
   639 00001886 29C9                <1> 	sub	ecx, ecx
   640 00001888 B502                <1> 	mov	ch, 2
   641                              <1> 	; ecx = 512
   642 0000188A E81AF50000          <1> 	call	transfer_to_user_buffer
   643 0000188F 59                  <1> 	pop	ecx
   644 00001890 5F                  <1> 	pop	edi
   645 00001891 720F                <1> 	jc	short vbe3_func_fail
   646                              <1> 
   647 00001893 31C0                <1> 	xor	eax, eax
   648 00001895 B04F                <1> 	mov	al, 4Fh ; successful
   649                              <1> ;vbe_ctrl_info_retn:
   650 00001897 C3                  <1> 	retn
   651                              <1> 
   652                              <1> vbe_biosfn_return_ctrl_info:
   653                              <1> 	; 12/12/2020
   654                              <1> 	;
   655                              <1> 	; VBE function 4F00h - Return VBE Controller Information
   656                              <1> 	;
   657                              <1> 	; Input:
   658                              <1> 	;      EDI = Pointer to buffer in which to place
   659                              <1> 	;	     VbeInfoBlock structure
   660                              <1> 	;
   661                              <1> 	;	AX = 4F00h
   662                              <1> 	; Output:
   663                              <1> 	;	AX = VBE return status
   664                              <1> 	;	     AX = 004Fh -> succeeded
   665                              <1> 	;	     AX <> 004Fh -> failed   
   666                              <1> 	; 
   667                              <1> 	; Modified registers: eax
   668                              <1> 
   669 00001898 21FF                <1> 	and	edi, edi
   670 0000189A 7406                <1> 	jz	short vbe3_func_fail ; invalid buffer addr !
   671 0000189C EBE1                <1> 	jmp	short _vbe_biosfn_return_ctrl_info 
   672                              <1> 
   673                              <1> vbe3_pmfn_return_mode_info:
   674                              <1> 	; 02/08/2022 (TRDOS 386 Kernel v2.0.5)	
   675                              <1> 	; 21/12/2020
   676                              <1> 	; 12/12/2020
   677                              <1> 	;
   678                              <1> 	; VBE function 4F01h - Return VBE Mode Information
   679                              <1> 	;
   680                              <1> 	; Input:
   681                              <1> 	;	CX = Mode number (VESA VBE mode number)
   682                              <1> 	;      EDI = Pointer to ModeInfoBlock structure
   683                              <1> 	;	     (256 bytes) -User's buffer address-
   684                              <1> 	;      EDI = 0 -> kernel call
   685                              <1> 	;		  (do not transfer ModeInfoBlock
   686                              <1> 	;		  to user's buffer address)
   687                              <1> 	;	AX = 4F01h	
   688                              <1> 	; Output:
   689                              <1> 	;	AX = VBE return status
   690                              <1> 	;	     AX = 004Fh -> succeeded
   691                              <1> 	;	     AX <> 004Fh -> failed   
   692                              <1> 	; 
   693                              <1> 	; Modified registers: eax, esi, edi
   694                              <1> 
   695                              <1> 	; int 31h (int 10h) entrance
   696                              <1> 	
   697 0000189E 09FF                <1> 	or	edi, edi
   698 000018A0 7506                <1> 	jnz	short _vbe3_pmfn_return_mode_info
   699                              <1> 
   700                              <1> vbe3_func_fail:
   701 000018A2 B84F010000          <1> 	mov	eax, 014Fh ; ah = 1 : Function call failed
   702                              <1> 			   ; al = 4Fh : Function is supported
   703 000018A7 C3                  <1> 	retn
   704                              <1> 	
   705                              <1> 	; jump from '_vbe_biosfn_return_mode_info' 
   706                              <1> _vbe3_pmfn_return_mode_info:
   707 000018A8 57                  <1> 	push	edi
   708                              <1> 
   709                              <1> 	;; clear vbe3 'mode info block' buffer
   710                              <1> 	;push	ecx
   711                              <1> 	;xor	eax, eax
   712                              <1> 	;mov	ecx, 256/4
   713                              <1> 	;mov	edi, VBE3MODEINFOBLOCK
   714                              <1> 	;rep	stosd
   715                              <1> 	;pop	ecx
   716                              <1> 
   717                              <1> 	; far call to VESA VBE3 PMI 
   718                              <1> 	;mov	ax, 4F01h ; Return VBE Mode Information
   719 000018A9 BF00060000          <1> 	mov	edi, VBE3MODEINFOBLOCK-VBE3SAVERESTOREBLOCK
   720                              <1> 	; ES selector base address = VBE3SAVERESTOREBLOCK 
   721 000018AE E812010000          <1> 	call	int10h_32bit_pmi
   722                              <1> 
   723 000018B3 5F                  <1> 	pop	edi
   724                              <1> 
   725                              <1> 	;cmp	ax, 004Fh
   726                              <1> 	;jne	short vbe3_func_retn  ; failed !
   727                              <1> 
   728 000018B4 21FF                <1> 	and	edi, edi
   729                              <1> 	;jz	short vbe3_func_success
   730                              <1> 	; 21/12/2020
   731 000018B6 741C                <1> 	jz	short vbe3_func_retn
   732                              <1> 
   733 000018B8 6683F84F            <1> 	cmp	ax, 004Fh
   734 000018BC 7516                <1> 	jne	short vbe3_func_retn  ; failed !
   735                              <1> 
   736 000018BE 51                  <1> 	push	ecx
   737 000018BF BE007C0900          <1> 	mov	esi, VBE3MODEINFOBLOCK		
   738                              <1> 	;mov	ecx, 256
   739                              <1> 	; 02/08/2022
   740 000018C4 29C9                <1> 	sub	ecx, ecx
   741 000018C6 FEC5                <1> 	inc	ch
   742                              <1> 	; ecx = 256
   743 000018C8 E8DCF40000          <1> 	call	transfer_to_user_buffer
   744 000018CD 59                  <1> 	pop	ecx
   745 000018CE 72D2                <1> 	jc	short vbe3_func_fail
   746                              <1> 
   747 000018D0 31C0                <1> 	xor	eax, eax
   748 000018D2 B04F                <1> 	mov	al, 4Fh ; successful
   749                              <1> vbe3_func_success:
   750                              <1> vbe3_func_retn:	
   751 000018D4 C3                  <1> 	retn
   752                              <1> 
   753                              <1> vbe3_pmfn_return_current_mode:
   754                              <1> 	; 12/12/2020
   755                              <1> 	;
   756                              <1> 	; VBE function 4F03h - Return Current VBE Mode
   757                              <1> 	;
   758                              <1> 	; Input:
   759                              <1> 	;	none (AX = 4F03h)
   760                              <1> 	; Output:
   761                              <1> 	;	AX = VBE return status
   762                              <1> 	;	     AX = 004Fh -> succeeded
   763                              <1> 	;	     AX <> 004Fh -> failed
   764                              <1> 	;	BX = Current VBE mode
   765                              <1> 	;	  bit 0-13 = Mode number
   766                              <1> 	;	  bit 14 = 0 Windowed frame buffer model
   767                              <1> 	;	         = 1 Linear frame buffer model
   768                              <1> 	;	  bit 15 
   769                              <1> 	;	      = 0 Memory cleared at last mode set
   770                              <1> 	;	      = 1 Memory not cleared at last mode set
   771                              <1> 	; 
   772                              <1> 	; Modified registers: eax, ebx
   773                              <1> 
   774                              <1> 	; int 31h (int 10h) entrance
   775                              <1> 	
   776                              <1> 	; far call to VESA VBE3 PMI 
   777                              <1> 
   778                              <1> 	;mov	eax, 4F03h ; Return Current VBE Mode
   779                              <1> vbe3_pmfn_far_call:
   780                              <1> 	; ES selector base address = VBE3SAVERESTOREBLOCK 
   781                              <1> 	;call	int10h_32bit_pmi
   782                              <1> 	;retn
   783 000018D5 E9EB000000          <1> 	jmp	int10h_32bit_pmi
   784                              <1> 
   785                              <1> vbe3_pmfn_set_mode:
   786                              <1> 	; 02/08/2022 (TRDOS 386 Kernel v2.0.5)
   787                              <1> 	; 22/12/2020
   788                              <1> 	; 21/12/2020
   789                              <1> 	; 12/12/2020
   790                              <1> 	;
   791                              <1> 	; VBE function 4F02h - Set VBE Mode
   792                              <1> 	;
   793                              <1> 	; Input:
   794                              <1> 	;	BX = Desired Mode to set
   795                              <1> 	;	  bit 0-13 = Mode number
   796                              <1> 	;	  bit 14 = 0 Windowed frame buffer model
   797                              <1> 	;	         = 1 Linear frame buffer model
   798                              <1> 	;	  bit 15 
   799                              <1> 	;	      = 0 Memory cleared at last mode set
   800                              <1> 	;	      = 1 Memory not cleared at last mode set
   801                              <1> 	; Output:
   802                              <1> 	;	AX = VBE return status
   803                              <1> 	;	     AX = 004Fh -> succeeded
   804                              <1> 	;	     AX <> 004Fh -> failed
   805                              <1> 	; 
   806                              <1> 	; Modified registers: eax, ebx, esi (21/12/2020)
   807                              <1> 
   808                              <1> 	; int 31h (int 10h) entrance
   809                              <1> 
   810                              <1> 	; 22/12/2020 (VESA VBE3 feature)
   811                              <1> 	; BX bit 11 is flag for
   812                              <1> 	;	user specified CRTC values for refresh rate
   813                              <1> 	; 'test bh, 8'
   814                              <1> 	; if bit 11 is set, EDI points to 'CRTCInfoBlock'
   815                              <1> 
   816                              <1> 	; 22/12/2020
   817                              <1> 	;; test bx for VBE video mode
   818                              <1> 	;test	bh, 1
   819                              <1> 	;jnz	short vbe3_sm_0
   820                              <1> 
   821                              <1> 	;; use internal VBE mode set procedure
   822                              <1> 	;; for non-vbe (std VGA/CGA) modes
   823                              <1> 	;
   824                              <1> 	;; (it is useful -as 4F02h function- 
   825                              <1> 	;;  to jump 'vbe_biosfn_set_mode'
   826                              <1> 	;;  instead of direct jump to '_set_mode')
   827                              <1> 	;; ((eliminates additional push-pops and settings))
   828                              <1>  
   829                              <1> 	;jmp	vbe_biosfn_set_mode	
   830                              <1> 
   831                              <1> vbe3_sm_0: 
   832                              <1> 	;;push	ds  ; *
   833                              <1> 	;;push	es  ; **
   834                              <1> 	;;push	ebp ; ***
   835                              <1> 	;;push	esi ; **** 
   836                              <1> 	
   837                              <1> 	; Fit bx to VESA VBE2 type mode setting
   838                              <1> 	; (bx bit 11 is used for custom CRTC values in VBE3)
   839                              <1> 	; clear bit 9 to 11 (clear bh bit 1 to bit 3)
   840                              <1> 
   841                              <1> 	; 22/12/2020
   842 000018DA 57                  <1> 	push	edi ; *****
   843 000018DB F6C708              <1> 	test	bh, 8	; Use user specified CRTC values
   844 000018DE 7530                <1> 	jnz	short vbe3_sm_3  ; for refresh rate
   845                              <1> vbe3_sm_4:
   846 000018E0 80E7C1              <1> 	and	bh, 0C1h ; use bit 15, 14, 8 only (for bh)
   847                              <1> 	;mov	[vbe_mode_x], bh
   848                              <1> 
   849 000018E3 803D[1E670000]03    <1> 	cmp	byte [CRT_MODE], 3 ; is current mode 03h ?
   850 000018EA 7509                <1> 	jne	short vbe3_sm_1    ; no
   851                              <1> 
   852                              <1> 	; save mode 03h video pages and cursor positions
   853 000018EC 57                  <1> 	push	edi ; **!***	
   854 000018ED 51                  <1> 	push	ecx ; ******
   855                              <1> 	;push	esi
   856                              <1> 	
   857 000018EE E8CE040000          <1> 	call	save_mode3_multiscreen
   858                              <1> 	
   859                              <1> 	;pop	esi
   860 000018F3 59                  <1> 	pop	ecx ; ******
   861 000018F4 5F                  <1> 	pop	edi ; **!***
   862                              <1> vbe3_sm_1:
   863                              <1> 	; ax = 4F02h
   864                              <1> 	; bx = video mode number (vbe2 type)
   865 000018F5 E8CB000000          <1> 	call	int10h_32bit_pmi 
   866                              <1> 			; call to far call to VBE3 PMI
   867                              <1> 
   868 000018FA 6683F84F            <1> 	cmp	ax, 004Fh ; succeeded ?
   869 000018FE 750E                <1> 	jne	short vbe3_sm_2
   870                              <1> 	; set current mode byte/sign to extended (SVGA) mode
   871 00001900 C605[1E670000]FF    <1> 	mov	byte [CRT_MODE], 0FFh ; VESA VBE mode
   872                              <1> 	; set current VBE mode word to bx input
   873 00001907 66891D[D20F0300]    <1> 	mov	[video_mode], bx
   874                              <1> vbe3_sm_2:
   875                              <1> 	; 22/12/2020
   876 0000190E 5F                  <1> 	pop	edi ; ***** 
   877 0000190F C3                  <1> 	retn
   878                              <1> 
   879                              <1> vbe3_sm_3:
   880                              <1> 	; 22/12/2020
   881                              <1> 	; copy user's CRTCInfoBlock to the buffer
   882 00001910 51                  <1> 	push	ecx
   883 00001911 89FE                <1> 	mov	esi, edi
   884 00001913 BF807D0900          <1> 	mov	edi, VBE3CRTCINFOBLOCK
   885                              <1> 	;mov	ecx, 64
   886                              <1> 	; 02/08/2022
   887 00001918 29C9                <1> 	sub	ecx, ecx
   888 0000191A B140                <1> 	mov	cl, 64
   889 0000191C E8D2F40000          <1> 	call	transfer_from_user_buffer
   890 00001921 59                  <1> 	pop	ecx
   891                              <1> 	; set offset (es base addr is VBE3SAVERESTOREBLOCK) 
   892 00001922 81EF00760900        <1> 	sub	edi, VBE3SAVERESTOREBLOCK
   893 00001928 EBB6                <1> 	jmp	short vbe3_sm_4
   894                              <1> 	
   895                              <1> vesa_vbe3_pmi:
   896                              <1> 	; 29/11/2023 - TRDOS 386 v2.0.7
   897                              <1> 	; 12/12/2020
   898                              <1> 	; 08/12/2020
   899                              <1> 	; 07/12/2020
   900                              <1> 	; 05/12/2020, 06/12/2020
   901                              <1> 	; 03/12/2020, 04/12/2020
   902                              <1> 	; 28/11/2020 (TRDOS 386 v2.0.3)
   903                              <1> 	; VGA BIOS functions via
   904                              <1> 	; VESA VBE3 Protected Mode Inface
   905                              <1> 	; [vbe3] = 3 and [pmi32] > 0
   906                              <1> 
   907                              <1> 	; 04/12/2020
   908                              <1> 	; Only 'set mode' will be redirected to vbe3 video bios
   909                              <1> 	; (by setting mode 3 multiscreen paraters before and after) 
   910                              <1> 
   911                              <1> 	; 29/11/2023 - TRDOS 386 v2.0.7
   912 0000192A 50                  <1> 	push	eax
   913 0000192B 0F20D8              <1> 	mov	eax, cr3
   914 0000192E 870424              <1> 	xchg	eax, [esp] ; **!**
   915 00001931 50                  <1> 	push	eax
   916                              <1> 	;cmp	esi, [k_page_dir]
   917                              <1> 	;je	short vesa_vbe3_pmi_x
   918 00001932 A1[48770100]        <1> 	mov	eax, [k_page_dir]
   919 00001937 0F22D8              <1> 	mov	cr3, eax
   920                              <1> ;vesa_vbe3_pmi_x:
   921 0000193A 58                  <1> 	pop	eax
   922                              <1> 
   923                              <1> 	; 06/12/2020
   924 0000193B 20E4                <1> 	and	ah, ah	; 0 = set mode function
   925 0000193D 7402                <1> 	jz	short vbe3_pmi_0
   926 0000193F EB7D                <1> 	jmp	vbe3_pmi_9 
   927                              <1> 
   928                              <1> vbe3_pmi_0:
   929                              <1> 	; 07/12/2020
   930 00001941 88C4                <1> 	mov	ah, al
   931 00001943 80E480              <1> 	and	ah, 80h ; 0 or 80h
   932 00001946 30E0                <1> 	xor	al, ah ; 8?h -> 0?h
   933                              <1> 
   934                              <1> 	;cmp	al, 13h ; mode number above 13h is returned
   935                              <1> 	;jna	short vbe3_pmi_1
   936                              <1> 	;		; back to default code due to uncertainty
   937                              <1> 	; 		; (>13h is not std for all svga bioses)
   938                              <1> 	;jmp	VGA_funcs_0
   939                              <1> vbe3_pmi_1:
   940                              <1> 	; 07/12/2020
   941                              <1> 	; Possible cases for VBE3 (PMI, ah=0) set mode:
   942                              <1> 	; current mode > 07h and requested mode: any 
   943                              <1> 	; current mode <= 07h and requested mode > 07h
   944                              <1> 
   945                              <1> 	; 06/12/2020
   946 00001948 8825[DB830100]      <1> 	mov	byte [noclearmem], ah ; 0 or 80h
   947                              <1> 	; check current video mode if it is 03h
   948 0000194E 803D[1E670000]03    <1> 	cmp	byte [CRT_MODE], 3 ; current mode
   949 00001955 750B                <1> 	jne	short vbe3_pmi_3
   950                              <1> 	; 07/12/2020
   951                              <1> 	; check new video mode if it is 03h also
   952                              <1> 	;cmp	al, 3
   953                              <1> 	;jne	short vbe3_pmi_2
   954                              <1> 	;mov	byte [p_crt_mode], 80h 	; clear video memory
   955                              <1> 	;jmp	short vbe3_pmi_5
   956                              <1> vbe3_pmi_2:
   957                              <1> 	; case 1:
   958                              <1> 	; Current mode is 03h and new mode is not 03h
   959                              <1> 
   960                              <1> 	; save video pages and cursor positions
   961 00001957 56                  <1> 	push	esi
   962 00001958 57                  <1> 	push	edi
   963 00001959 51                  <1> 	push	ecx
   964                              <1> 
   965                              <1> 	; 12/12/2020
   966                              <1> 	;mov	esi, 0B8000h ; mode 3 video memory
   967                              <1> 	;mov	edi, 98000h  ; backup location
   968                              <1> 	;mov	ecx, (0B8000h-0B0000h)/4
   969                              <1> 	;rep	movsd
   970                              <1> 	;
   971                              <1> 	;mov	byte [p_crt_mode], 3 ; previous mode, backup sign
   972                              <1> 	;xchg	cl, [ACTIVE_PAGE]
   973                              <1> 	;mov	[p_crt_page], cl  ; save as previous active page
   974                              <1> 	;
   975                              <1> 	;; save cursor positions
   976                              <1> 	;mov	esi, CURSOR_POSN
   977                              <1> 	;mov	edi, cursor_pposn ; cursor positions backup
   978                              <1> 	;mov	cl, 4
   979                              <1> 	;rep	movsd
   980                              <1> 
   981                              <1> 	; 12/12/2020
   982 0000195A E862040000          <1> 	call	save_mode3_multiscreen
   983                              <1> 
   984 0000195F 59                  <1> 	pop	ecx
   985 00001960 5F                  <1> 	pop	edi
   986 00001961 5E                  <1> 	pop	esi
   987                              <1> vbe3_pmi_3:
   988                              <1> 	; 08/12/2020
   989                              <1> 	; 07/12/2020
   990                              <1> 	; case 3 or case 4
   991 00001962 A2[1E670000]        <1> 	mov	[CRT_MODE], al
   992 00001967 3C03                <1> 	cmp	al, 3
   993 00001969 7407                <1> 	je	short vbe3_pmi_4
   994                              <1> 	; case 4:
   995                              <1> 	; Current mode is not 03h and also new mode is not 03h
   996 0000196B 800D[D9830100]80    <1> 	or	byte [p_crt_mode], 80h  ; 83h (case 1 -> case 4)
   997                              <1> 	;jmp	short vbe3_pmi_5
   998                              <1> vbe3_pmi_4:
   999                              <1> 	; case 3:
  1000                              <1> 	;
  1001                              <1> 	; Current mode is not 03h and new mode is 03h
  1002                              <1> 
  1003                              <1> ;vbe3_pmi_5:
  1004                              <1> 	;mov	[CRT_MODE], al
  1005                              <1> 
  1006 00001972 E84E000000          <1> 	call	int10h_32bit_pmi	
  1007                              <1> 
  1008 00001977 803D[1E670000]03    <1> 	cmp	byte [CRT_MODE], 3  ; new video mode
  1009                              <1> 	;jne	vbe3_pmi_8	; video mode <> 03h
  1010 0000197E 7532                <1> 	jne	short vbe3_pmi_8	
  1011                              <1> 
  1012                              <1> 	;push	eax ; 04/12/2020
  1013 00001980 53                  <1> 	push	ebx
  1014 00001981 51                  <1> 	push	ecx
  1015 00001982 52                  <1> 	push	edx
  1016 00001983 57                  <1> 	push	edi ; 03/12/2020
  1017                              <1> 
  1018                              <1> 	; 12/12/2020
  1019 00001984 56                  <1> 	push	esi
  1020 00001985 E869040000          <1> 	call	restore_mode3_multiscreen
  1021 0000198A 5E                  <1> 	pop	esi
  1022                              <1> 	; AL = active video page
  1023                              <1> 
  1024                              <1> 	; 12/12/2020
  1025                              <1> 	;mov	al, [p_crt_page] ; previous mode 3 active page
  1026                              <1> 	;
  1027                              <1> 	;;test	byte [p_crt_mode], 7Fh ; 83h or 80h or 03h
  1028                              <1> 	;;jz	short vbe3_pmi_6 ; do not restore video pages
  1029                              <1> 	;			 ; clear current video page
  1030                              <1> 	;; case 3
  1031                              <1> 	;
  1032                              <1> 	;; ([p_crt_mode] = 03h)
  1033                              <1> 	;
  1034                              <1> 	;; New video mode is 3 while current video mode is not 3
  1035                              <1> 	;; (multi screen) video pages will be restored from 098000h
  1036                              <1> 	;
  1037                              <1> 	;; restore video pages and cursor positions
  1038                              <1> 	;
  1039                              <1> 	;mov	[ACTIVE_PAGE], al ; current mode 3 active page
  1040                              <1> 	;
  1041                              <1> 	;push	esi
  1042                              <1> 	;
  1043                              <1> 	;; restore video pages
  1044                              <1> 	;mov	esi, 98000h
  1045                              <1> 	;mov	edi, 0B8000h
  1046                              <1> 	;;mov	ecx, 2000h
  1047                              <1> 	;mov	cx, 2000h ; 8K dwords (32K)
  1048                              <1> 	;rep	movsd
  1049                              <1> 	;
  1050                              <1> 	;mov	[p_crt_mode], cl ; reset ('case 3' end condition)
  1051                              <1> 	;
  1052                              <1> 	;; restore cursor positions
  1053                              <1> 	;mov	esi, cursor_pposn
  1054                              <1> 	;mov	edi, CURSOR_POSN
  1055                              <1> 	;;mov	ecx, 4	; restore all cursor positions (16 bytes)
  1056                              <1> 	;mov	cl, 4
  1057                              <1> 	;rep 	movsd
  1058                              <1> 	;
  1059                              <1> 	;pop	esi
  1060                              <1> 	;
  1061                              <1> 	;; 07/12/2020
  1062                              <1> 	;; restore CRT_START according to ACTIVE_PAGE
  1063                              <1> 	;mov	[CRT_START], cx ; 0
  1064                              <1> 	;
  1065                              <1> 	;; check active page and set it again if it is not 0
  1066                              <1> 	;or	al, al
  1067                              <1> 	;jz	short vbe3_pmi_7
  1068                              <1> 	;
  1069                              <1> 	;mov	cl, al
  1070                              <1> ;vbe3_pmi_5:
  1071                              <1> 	;add	word [CRT_START], 4096
  1072                              <1> 	;dec	cl
  1073                              <1> 	;jnz	short vbe3_pmi_5
  1074                              <1> 
  1075 0000198B B405                <1> 	mov	ah, 05h ; set current video page
  1076                              <1> 	;al = video page
  1077 0000198D E833000000          <1> 	call	int10h_32bit_pmi
  1078                              <1> 	
  1079                              <1> 	; check current cursor position & set it again if not 0,0
  1080                              <1> 	;movzx	ebx, byte [ACTIVE_PAGE]
  1081 00001992 0FB6D8              <1> 	movzx	ebx, al
  1082 00001995 D0E3                <1> 	shl	bl, 1
  1083 00001997 81C3[66770100]      <1> 	add	ebx, CURSOR_POSN
  1084 0000199D 668B13              <1> 	mov	dx, [ebx]
  1085 000019A0 6621D2              <1> 	and	dx, dx		
  1086 000019A3 7409                <1> 	jz	short vbe3_pmi_7
  1087                              <1> 	
  1088                              <1> 	;dx = cursor position (dl = column, dh = row)
  1089                              <1> 	;mov	bh, [ACTIVE_PAGE] ; 06/12/2020
  1090 000019A5 88C7                <1> 	mov	bh, al
  1091 000019A7 B402                <1> 	mov	ah, 02h ; set cursor position
  1092 000019A9 E817000000          <1> 	call	int10h_32bit_pmi
  1093                              <1> 	
  1094                              <1> 	;jmp	short vbe3_pmi_7
  1095                              <1> 
  1096                              <1> ;vbe3_pmi_6:
  1097                              <1> ;	; 07/12/2020
  1098                              <1> ;	; case 1, previous mode is 03h, current mode is 03h
  1099                              <1> ;	; 03/12/2020
  1100                              <1> ;	cmp	byte [noclearmem], 0
  1101                              <1> ;	jna	short vbe3_pmi_7 ; do not clear memory
  1102                              <1> ;	; clear video page
  1103                              <1> ;	mov	ecx, 1024 ; 4096/4
  1104                              <1> ;	mov	eax, 07200720h
  1105                              <1> ;	mov	edi, 0B8000h ; [crt_base]
  1106                              <1> ;	add	di, [CRT_START]
  1107                              <1> ;	rep	stosd	; FILL THE REGEN BUFFER WITH BLANKS
  1108                              <1> 
  1109                              <1> vbe3_pmi_7:
  1110 000019AE 5F                  <1> 	pop	edi
  1111 000019AF 5A                  <1> 	pop	edx
  1112 000019B0 59                  <1> 	pop	ecx
  1113 000019B1 5B                  <1> 	pop	ebx
  1114                              <1> 	;pop	eax ; 04/12/2020
  1115                              <1> vbe3_pmi_8:
  1116                              <1> 	; 04/12/2020
  1117                              <1> 	;(TRDOS 386 v2.0.3, INT 31h, ah=0 return)
  1118 000019B2 31C0                <1> 	xor	eax, eax  ; eax = 0 -> succesful
  1119                              <1> vesa_vbe3_pmi_retn:
  1120                              <1> 	; 29/11/2023 - TRDOS 386 v2.0.7
  1121 000019B4 870424              <1> 	xchg	eax, [esp] ; **!**
  1122                              <1> 	;cmp	eax, [k_page_dir]
  1123                              <1> 	;je	short vesa_vbe3_pmi_retn_x
  1124 000019B7 0F22D8              <1> 	mov	cr3, eax
  1125                              <1> ;vesa_vbe3_pmi_retn_x:
  1126 000019BA 58                  <1> 	pop	eax
  1127                              <1> 	;
  1128 000019BB 07                  <1> 	pop	es  ; **
  1129 000019BC 1F                  <1> 	pop	ds  ; *
  1130 000019BD CF                  <1> 	iretd
  1131                              <1> 
  1132                              <1> vbe3_pmi_9:
  1133                              <1> 	; 06/12/2020 
  1134                              <1> 	;cmp	ah, 10h ; Set/Get Palette Registers
  1135                              <1> 	;jnb	short vbe3_pmi_10
  1136                              <1> 	; 05/12/2020
  1137 000019BE E802000000          <1> 	call	int10h_32bit_pmi
  1138 000019C3 EBEF                <1> 	jmp	short vesa_vbe3_pmi_retn
  1139                              <1> 
  1140                              <1> ;vbe3_pmi_10:
  1141                              <1> 	; 06/12/2020
  1142                              <1> 	;jmp	VGA_funcs_0
  1143                              <1> 
  1144                              <1> int10h_32bit_pmi:
  1145                              <1> 	; 03/12/2020
  1146                              <1> 	; 28/11/2020
  1147                              <1> 	; calling standard VGA Bios (INT 10h) functions
  1148                              <1> 	; by using 32 bit protected mode interface of
  1149                              <1> 	; VESA VBE3 Video Bios (with 'PMID' signature)
  1150                              <1> 
  1151                              <1> 	; 03/12/2020
  1152                              <1> 	; eax, ebx, ecx, edx, edi will be used by vbios pmi
  1153                              <1> 	; (esi and ebp will not be used) 
  1154                              <1> 
  1155                              <1> 	; 03/12/2020
  1156 000019C5 56                  <1> 	push	esi
  1157 000019C6 C1E010              <1> 	shl	eax, 16  ; move function number (ax) to hw
  1158 000019C9 8B35[D80F0300]      <1> 	mov	esi, [pmid_addr] ; linear address of
  1159                              <1> 				 ; PMInfo.Entrypoint pointer
  1160                              <1> 	;mov	ax, [esi+PMInfo.EntryPoint]	
  1161 000019CF 668B06              <1> 	mov	ax, [esi]	 
  1162 000019D2 C1C010              <1> 	rol	eax, 16 ; move PM entry address to hw
  1163                              <1> 			; and move function number to lw (ax)
  1164 000019D5 5E                  <1> 	pop	esi
  1165                              <1> 
  1166                              <1> 	; top of stack: ; (*)
  1167                              <1> 	; return (the caller) address of "int10h_32bit_pmi"
  1168                              <1> 
  1169 000019D6 E9B1EDFFFF          <1> 	jmp	_VBE3PMI_fcall ; will return to the caller (*)
  1170                              <1> 
  1171                              <1> _vbe3_pmfn_srs_8:
  1172                              <1> 	; 17/01/2021
  1173 000019DB 31DB                <1> 	xor 	ebx, ebx ; points to VBE3SAVERESTOREBLOCK
  1174                              <1> _vbe3_pmfn_srs_9: ; 24/01/2021
  1175 000019DD 66B8044F            <1> 	mov	ax, 4F04h
  1176 000019E1 EBE2                <1> 	jmp	short int10h_32bit_pmi
  1177                              <1> 
  1178                              <1> vbe3_pmfn_save_restore_state:
  1179                              <1> 	; 02/08/2022 (TRDOS 386 Kernel v2.0.5)
  1180                              <1> 	; 24/01/2021
  1181                              <1> 	; 23/01/2021
  1182                              <1> 	; 16/01/2021 - 17/01/2021
  1183                              <1> 	; 14/01/2021
  1184                              <1> 	;
  1185                              <1> 	; VBE function 4F04h - Save/Restore Video State
  1186                              <1> 	;
  1187                              <1> 	; Input:
  1188                              <1> 	;	DL = sub function
  1189                              <1> 	;	CL = requested state
  1190                              <1> 	;      EBX = pointer to buffer (if DL<>00h)
  1191                              <1> 	;	AX = 4F04h 
  1192                              <1> 	; Output:
  1193                              <1> 	;	AX = 004Fh (successful)
  1194                              <1> 	;	AH > 0 -> error
  1195                              <1> 	;	BX = Number of 64-byte blocks 
  1196                              <1> 	;	     to hold the state buffer (if DL=00h)
  1197                              <1> 
  1198                              <1> 	; Modified registers: eax, ebx, esi, edi
  1199                              <1> 	
  1200 000019E3 21DB                <1> 	and	ebx, ebx ; user's buffer address
  1201 000019E5 750A                <1> 	jnz	short _vbe3_pmfn_save_restore_state
  1202                              <1> 
  1203 000019E7 08D2                <1> 	or	dl, dl
  1204 000019E9 740C                <1> 	jz	short _vbe3_pmfn_srs_0
  1205                              <1> 
  1206                              <1> 	; function failed
  1207                              <1> 	;;mov	eax, 0100h
  1208                              <1> 	;sub	eax, eax
  1209                              <1> 	;inc	ah  ; eax = 0100h
  1210                              <1> 	;retn
  1211                              <1> 	; 16/01/2021
  1212                              <1> _vbe3_pmfn_srs_fail:
  1213 000019EB B84F010000          <1> 	mov	eax, 014Fh ; ah = 1 : Function call failed
  1214                              <1> 			   ; al = 4Fh : Function is supported
  1215                              <1> _vbe3_srs_retn:
  1216 000019F0 C3                  <1> 	retn
  1217                              <1> 
  1218                              <1> _vbe3_pmfn_save_restore_state:
  1219 000019F1 20D2                <1> 	and	dl, dl
  1220 000019F3 7555                <1> 	jnz	short _vbe3_pmfn_srs_2
  1221                              <1> _vbe3_pmfn_srs:
  1222 000019F5 31DB                <1> 	xor	ebx, ebx
  1223                              <1> _vbe3_pmfn_srs_0:
  1224                              <1> 	; 24/01/2021
  1225 000019F7 83F90F              <1> 	cmp	ecx, 0Fh
  1226                              <1> 	;ja	short _vbe3_pmfn_srs_1
  1227 000019FA 77EF                <1> 	ja	short _vbe3_pmfn_srs_fail 
  1228                              <1> 
  1229                              <1> 	; !!! CLEAR CL BIT 2 !!! 
  1230                              <1> 	; (when bit 2 is set, function causes cpu exception)
  1231                              <1> 	; BIOS data will not be saved and restored
  1232                              <1> 	; (to prevent protected mode page fault error)
  1233 000019FC 80E1FD              <1> 	and	cl, ~2 ; and cl, not 2
  1234                              <1> 	
  1235                              <1> 	; 24/01/2021
  1236                              <1> 	;mov	bl, 1
  1237 000019FF FEC3                <1> 	inc	bl ; = 1
  1238                              <1> 	;shl	bx, cl 
  1239                              <1> 	; 02/08/2022
  1240 00001A01 D3E3                <1> 	shl	ebx, cl
  1241 00001A03 66231D[DC0F0300]    <1> 	and	bx, [vbe3stbsflags]
  1242 00001A0A 7415                <1> 	jz	short _vbe3_pmfn_srs_1
  1243                              <1> 	;mov	bx, cx
  1244 00001A0C 89CB                <1> 	mov	ebx, ecx ; <= 15
  1245 00001A0E D0E3                <1> 	shl	bl, 1 ; 0, 2, 8 .. 30
  1246 00001A10 668B9B[193B0000]    <1> 	mov	bx, [vbestatebufsize+ebx]
  1247 00001A17 89DF                <1> 	mov	edi, ebx
  1248                              <1> 	; edi = state buffer size in bytes
  1249                              <1> 	;shr	bx, 6 ; / 64
  1250                              <1> 	; 02/08/2022
  1251 00001A19 C1EB06              <1> 	shr	ebx, 6
  1252                              <1> 	;mov	ax, 4Fh
  1253 00001A1C 28E4                <1> 	sub	ah, ah
  1254 00001A1E B04F                <1> 	mov	al, 4Fh
  1255 00001A20 C3                  <1> 	retn
  1256                              <1> _vbe3_pmfn_srs_1:
  1257                              <1> 	; ax = 4F04h
  1258                              <1> 	;call	int10h_32bit_pmi
  1259                              <1> 	; 24/01/2021
  1260                              <1> 	;call	_vbe3_pmfn_srs_8
  1261                              <1> 	; ebx = 0
  1262 00001A21 E8B7FFFFFF          <1> 	call	_vbe3_pmfn_srs_9	
  1263 00001A26 6683F84F            <1> 	cmp	ax, 004Fh
  1264 00001A2A 75C4                <1> 	jne	short _vbe3_srs_retn
  1265                              <1> 	; 24/01/2021
  1266                              <1> 	;cmp	ecx, 0Fh
  1267                              <1> 	;ja	short _vbe3_srs_retn
  1268                              <1> 	; 24/01/2021
  1269                              <1> 	;mov	ax, 1
  1270 00001A2C B001                <1> 	mov	al, 1
  1271                              <1> 	;shl	ax, cl		
  1272                              <1> 	; 02/08/2022
  1273 00001A2E D3E0                <1> 	shl	eax, cl
  1274 00001A30 660905[DC0F0300]    <1> 	or	[vbe3stbsflags], ax ; set flag for state option
  1275                              <1> 	; 23/01/2021
  1276 00001A37 89DF                <1> 	mov	edi, ebx
  1277 00001A39 89C8                <1> 	mov	eax, ecx
  1278 00001A3B D0E0                <1> 	shl	al, 1
  1279                              <1> 	;shl	di, 6 ; * 64
  1280                              <1> 	; 02/08/2022
  1281 00001A3D C1E706              <1> 	shl	edi, 6
  1282 00001A40 6689B8[193B0000]    <1> 	mov	[vbestatebufsize+eax], di
  1283                              <1> 				; save buf size for option 
  1284                              <1> 	;xchg	edi, ebx
  1285                              <1> 	; edi = state buffer size in bytes
  1286 00001A47 B04F                <1> 	mov	al, 4Fh
  1287 00001A49 C3                  <1> 	retn
  1288                              <1> 
  1289                              <1> _vbe3_pmfn_srs_2:
  1290                              <1> 	; 24/01/2021
  1291                              <1> 	; !!! CLEAR CL BIT 2 !!! 
  1292                              <1> 	; (when bit 2 is set, function causes cpu exception)
  1293                              <1> 	; BIOS data will not be saved and restored
  1294                              <1> 	; (to prevent protected mode page fault error)
  1295                              <1> 
  1296 00001A4A F6C1FD              <1> 	test	cl, ~2 ; test cl, not 2
  1297 00001A4D 749C                <1> 	jz	short _vbe3_pmfn_srs_fail
  1298                              <1> 
  1299 00001A4F 80FA02              <1> 	cmp	dl, 2
  1300 00001A52 7748                <1> 	ja	short _vbe3_pmfn_srs_5
  1301                              <1> 
  1302                              <1> 	;and	cl, ~2 ; and cl, not 2
  1303                              <1> 
  1304 00001A54 53                  <1> 	push	ebx ; * ; buffer address
  1305                              <1> 	; save or restore state
  1306                              <1> 	; (get required buffer size at first)
  1307 00001A55 52                  <1> 	push	edx ; **
  1308 00001A56 28D2                <1> 	sub	dl, dl ; 0
  1309 00001A58 E898FFFFFF          <1> 	call	_vbe3_pmfn_srs
  1310 00001A5D 5A                  <1> 	pop	edx ; **
  1311                              <1> 	; 24/01/2021
  1312 00001A5E 5B                  <1> 	pop	ebx ; *
  1313 00001A5F 08E4                <1> 	or	ah, ah
  1314 00001A61 7538                <1> 	jnz	short _vbe3_pmfn_srs_4 ; error
  1315                              <1> 
  1316                              <1> 	; edi = buffer size in bytes
  1317 00001A63 81FF00080000        <1> 	cmp	edi, 2048
  1318 00001A69 772B                <1> 	ja	short _vbe3_pmfn_srs_3
  1319                              <1> 
  1320 00001A6B 80FA01              <1> 	cmp	dl, 1
  1321 00001A6E 7531                <1> 	jne	short _vbe3_pmfn_srs_6 ; restore state
  1322                              <1> 	
  1323                              <1> 	; save video state
  1324                              <1> 	;xor 	ebx, ebx ; points to VBE3SAVERESTOREBLOCK
  1325                              <1> 	;mov	ax, 4F04h
  1326                              <1> 	;call	int10h_32bit_pmi
  1327                              <1> 
  1328                              <1> 	; 24/01/2021
  1329 00001A70 E842000000          <1> 	call	_vbe3_pmfn_srs_7
  1330                              <1> 	
  1331 00001A75 6683F84F            <1> 	cmp	ax, 004Fh
  1332 00001A79 7520                <1> 	jne	short _vbe3_pmfn_srs_4
  1333                              <1> 
  1334 00001A7B 09DB                <1> 	or	ebx, ebx  ; kernel ('sysvideo') ?
  1335 00001A7D 741C                <1> 	jz	short _vbe3_pmfn_srs_4 ; yes
  1336                              <1> 
  1337                              <1> 	; the caller is user
  1338 00001A7F 51                  <1> 	push	ecx ; *
  1339 00001A80 89F9                <1> 	mov	ecx, edi ; state buffer size
  1340 00001A82 BE00760900          <1> 	mov	esi, VBE3SAVERESTOREBLOCK ; source
  1341                              <1> 					; (vbe3 pmi buff)
  1342 00001A87 89DF                <1> 	mov	edi, ebx	; destination (user buff)
  1343 00001A89 E81BF30000          <1> 	call	transfer_to_user_buffer
  1344 00001A8E 59                  <1> 	pop	ecx ; *
  1345 00001A8F 7205                <1> 	jc	short _vbe3_pmfn_srs_3
  1346                              <1> 
  1347 00001A91 29C0                <1> 	sub	eax, eax
  1348 00001A93 B04F                <1> 	mov	al, 4Fh
  1349 00001A95 C3                  <1> 	retn
  1350                              <1> 
  1351                              <1> 	; 24/01/2021
  1352                              <1> _vbe3_pmfn_srs_3:
  1353 00001A96 B84F010000          <1> 	mov	eax, 014Fh
  1354                              <1> _vbe3_pmfn_srs_4:
  1355 00001A9B C3                  <1> 	retn
  1356                              <1> _vbe3_pmfn_srs_5:
  1357 00001A9C 31C0                <1> 	xor	eax, eax
  1358 00001A9E FEC4                <1> 	inc	ah
  1359                              <1> 	; eax = 0100h, function is not supported
  1360 00001AA0 C3                  <1> 	retn
  1361                              <1> 
  1362                              <1> _vbe3_pmfn_srs_6:
  1363                              <1> 	; restore video state
  1364                              <1> 	; 24/01/2021
  1365                              <1> 	;pop	ebx ; *
  1366                              <1> 	; 23/01/2021
  1367 00001AA1 09DB                <1> 	or	ebx, ebx ; 0 ?	
  1368 00001AA3 7412                <1> 	jz	short _vbe3_pmfn_srs_7 ; 'sysvideo' call
  1369                              <1> 	; 24/01/2021
  1370                              <1> 	;jz	_vbe3_pmfn_srs_8
  1371 00001AA5 89DE                <1> 	mov	esi, ebx
  1372                              <1> 	; esi = user's video state buffer
  1373 00001AA7 51                  <1> 	push	ecx ; *
  1374 00001AA8 89F9                <1> 	mov	ecx, edi ; state buffer size
  1375 00001AAA BF00760900          <1> 	mov	edi, VBE3SAVERESTOREBLOCK ; destination
  1376                              <1> 					; (vbe3 pmi buff)
  1377                              <1> 	;mov	esi, ebx	; source (user buff)
  1378 00001AAF E83FF30000          <1> 	call	transfer_from_user_buffer
  1379 00001AB4 59                  <1> 	pop	ecx ; *
  1380 00001AB5 72DF                <1> 	jc	short _vbe3_pmfn_srs_3
  1381                              <1> _vbe3_pmfn_srs_7:
  1382 00001AB7 53                  <1> 	push	ebx ; *
  1383                              <1> 	; restore video state
  1384                              <1> 	;xor 	ebx, ebx ; points to VBE3SAVERESTOREBLOCK
  1385                              <1> 	;mov	ax, 4F04h
  1386                              <1> 	;call	int10h_32bit_pmi
  1387                              <1> 	; 17/01/2021
  1388 00001AB8 E81EFFFFFF          <1> 	call	_vbe3_pmfn_srs_8
  1389 00001ABD 5B                  <1> 	pop	ebx ; *
  1390 00001ABE C3                  <1> 	retn
  1391                              <1> 
  1392                              <1> VIDEO_STATE:
  1393                              <1> 	; 26/06/2016
  1394                              <1> 	; 12/05/2016
  1395                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  1396                              <1> 
  1397                              <1> ;---------------------------------------------------
  1398                              <1> ; VIDEO STATE
  1399                              <1> ;  RETURNS THE CURRENT VIDEO STATE IN AX
  1400                              <1> ;  AH = NUMBER OF COLUMNS ON THE SCREEN
  1401                              <1> ;  AL = CURRENT VIDEO MODE
  1402                              <1> ;  BH = CURRENT ACTIVE PAGE
  1403                              <1> ;---------------------------------------------------
  1404                              <1> 
  1405 00001ABF 8A25[20670000]      <1> 	mov	ah, [CRT_COLS]	; GET NUMBER OF COLUMNS
  1406 00001AC5 A0[1E670000]        <1> 	mov	al, [CRT_MODE]	; CURRENT MODE
  1407                              <1> 	;movzx	esi, al
  1408                              <1> 	;mov	ah, [esi+M6] 
  1409                              <1> 	; BH = active page
  1410 00001ACA 8A3D[76770100]      <1> 	mov	bh, [ACTIVE_PAGE] ; GET CURRENT ACTIVE PAGE
  1411 00001AD0 FA                  <1> 	cli	; 02/01/2017
  1412 00001AD1 5D                  <1> 	pop	ebp		; RECOVER REGISTERS
  1413 00001AD2 5F                  <1> 	pop	edi
  1414 00001AD3 5E                  <1> 	pop	esi
  1415 00001AD4 59                  <1> 	pop	ecx		; DISCARD SAVED BX
  1416 00001AD5 EB41                <1> 	jmp	short M15	; RETURN TO CALLER
  1417                              <1> 
  1418                              <1> set_mode_ncm:
  1419                              <1> 	; 17/11/2020 (TRDOS 386 v2.0.3)
  1420                              <1> 	; 04/07/2016 - TRDOS 386 (TRDOS v2.0)
  1421                              <1> 	; set mode without clearing the video memory
  1422                              <1> 	; (ony for graphics modes)
  1423                              <1> 
  1424                              <1> 	;cmp	al, 7 ; IBM PC CGA modes
  1425                              <1> 	;jna	short SET_MODE ; normal function (clear)
  1426                              <1> 	;; do not clear memory
  1427                              <1> 	;;mov	[noclearmem], al ; > 0
  1428                              <1> 	;mov	byte [noclearmem], 80h ; 17/11/2020
  1429                              <1> 	;call	_set_mode
  1430                              <1> 	;mov	byte [noclearmem], 0
  1431                              <1>         ;jmp     short VIDEO_RETURN
  1432                              <1> 
  1433                              <1> 	; 17/11/2020 (TRDOS v2.0.3)
  1434 00001AD7 0C80                <1> 	or	al, 80h ; not clear memory option
  1435                              <1> 
  1436                              <1> 	; 05/12/2020
  1437                              <1> 	; 27/11/2020
  1438                              <1> 	; 17/11/2020
  1439                              <1> 	; 08/08/2016, 10/08/2016
  1440                              <1> 	; 29/07/2016, 30/07/2016
  1441                              <1> 	; 25/07/2016, 26/07/2016, 27/07/2016
  1442                              <1> 	; 02/07/2016, 18/07/2016, 23/07/2016
  1443                              <1> 	; 24/06/2016, 26/06/2016
  1444                              <1> 	; 29/05/2016 - TRDOS 386 (TRDOS v2.0)
  1445                              <1> SET_MODE:
  1446                              <1> 	; For 32 bit TRDOS and Retro UNIX 386:
  1447                              <1> 	;	valid video mode: 03h only!
  1448                              <1> 	;	(VGA modes will be selected with another routine)
  1449                              <1> 	;
  1450                              <1> 	; set_txt_mode ; 80*25 (16 fore colors, 8 back colors)
  1451                              <1> 
  1452                              <1> 	; 27/11/2020
  1453                              <1> 	
  1454                              <1> 	; Check if current mode is 
  1455                              <1> 	; Bochs/Plex86 VBE graphics mode
  1456 00001AD9 803D[1E670000]FF    <1> 	cmp	byte [CRT_MODE], 0FFh ; VESA VBE graphics mode
  1457 00001AE0 7220                <1> 	jb	short _set_mode_      ; signature  	
  1458                              <1> 				      ; VBE mode number is in	 
  1459                              <1> 				      ; [video_mode] bit 0to8
  1460 00001AE2 88C3                <1> 	mov	bl, al ; save video mode
  1461 00001AE4 E87C230000          <1> 	call	dispi_get_enable
  1462 00001AE9 50                  <1> 	push	eax ; save current VBE dispi status 
  1463                              <1> 	; Disable Bochs/Plex86 VBE dispi
  1464                              <1> 	;mov	ax, 0 ; VBE_DISPI_DISABLED 
  1465 00001AEA 31C0                <1> 	xor	eax, eax ; 0 
  1466 00001AEC E849230000          <1> 	call	dispi_set_enable
  1467 00001AF1 88D8                <1> 	mov	al, bl ; restore video mode
  1468 00001AF3 E827000000          <1> 	call	_set_mode
  1469 00001AF8 58                  <1> 	pop	eax ; restore current VBE dispi status 
  1470 00001AF9 7313                <1> 	jnc	short VIDEO_RETURN
  1471                              <1> 	; ! unimplemented or invalid video mode number !
  1472                              <1> 	; VBE dispi must be enabled again
  1473                              <1> 	; (return to run on current VBE graphics mode)
  1474                              <1> 	;;mov	al, [video_mode+1] ; bit 8 to 15
  1475                              <1> 	;;and	al, 0C0h ; isolate bit 14 and bit 15 
  1476                              <1> 	;;or	al, 1 ; VBE_DISPI_ENABLED
  1477 00001AFB E83A230000          <1> 	call	dispi_set_enable
  1478 00001B00 EB07                <1> 	jmp	short _video_func_err
  1479                              <1> 
  1480                              <1> _set_mode_:
  1481                              <1> 	; VGA bios (non-VBE) 'setmode' procedure
  1482                              <1> 
  1483                              <1> 	; 26/11/2020 (TRDOS v2.0.3)
  1484                              <1> 	
  1485                              <1> ;------------------------------------------------------
  1486                              <1> ; SET MODE					      :
  1487                              <1> ;	THIS ROUTINE INITIALIZES THE ATTACHMENT TO    :
  1488                              <1> ;	THE SELECTED MODE, THE SCREEN IS BLANKED.     :
  1489                              <1> ; INPUT						      :
  1490                              <1> ;	(AL) - MODE SELECTED (RANGE 0-7)	      :
  1491                              <1> ; OUTPUT					      :
  1492                              <1> ;	NONE					      :
  1493                              <1> ;------------------------------------------------------
  1494                              <1> 
  1495 00001B02 E818000000          <1> 	call	_set_mode ; 24/06/2016 (set_txt_mode)
  1496                              <1> 	; 26/11/2020
  1497 00001B07 7305                <1> 	jnc	short VIDEO_RETURN
  1498                              <1> 
  1499                              <1> 	; 26/11/2020
  1500                              <1> _video_func_err:
  1501 00001B09 31C0                <1> 	xor	eax, eax ; function call failed
  1502 00001B0B 48                  <1> 	dec	eax  ; 0FFFFFFFFh ; - 1	
  1503 00001B0C EB05                <1> 	jmp	short _video_return	
  1504                              <1> 
  1505                              <1> ; 12/05/2016
  1506                              <1> ; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  1507                              <1> 
  1508                              <1> ;-----	NORMAL RETURN FROM ALL VIDEO RETURNS
  1509                              <1> 
  1510                              <1> VIDEO_RETURN:
  1511 00001B0E A1[CC830100]        <1> 	mov	eax, [video_eax] ; 12/05/2016
  1512                              <1> _video_return:
  1513 00001B13 FA                  <1> 	cli ; 02/01/2017
  1514 00001B14 5D                  <1> 	pop	ebp ; ******** ; 26/11/2020
  1515 00001B15 5F                  <1> 	pop	edi ; *******
  1516 00001B16 5E                  <1> 	pop	esi ; ******
  1517 00001B17 5B                  <1> 	pop	ebx ; *****
  1518                              <1> M15:	; VIDEO_RETURN_C
  1519                              <1> 	;;15/01/2017
  1520                              <1> 	; 02/01/2017
  1521                              <1> 	;;mov	byte [intflg], 0
  1522                              <1> 	;
  1523 00001B18 59                  <1> 	pop	ecx ; **** ; 26/11/2020
  1524 00001B19 5A                  <1> 	pop	edx ; ***
  1525 00001B1A 1F                  <1> 	pop	ds  ; **
  1526 00001B1B 07                  <1> 	pop	es  ; *	; RECOVER SEGMENTS
  1527 00001B1C CF                  <1> 	iretd		; ALL DONE
  1528                              <1> 
  1529                              <1> set_txt_mode:
  1530                              <1> 	
  1531                              <1> 	; 29/07/2016
  1532                              <1> 	; 27/06/2016
  1533 00001B1D B003                <1> 	mov	al, 3 ; 26/11/2020 (bit 7 = 0)
  1534                              <1> 
  1535                              <1> 	; 17/11/2020 (TRDOS v2.0.3)
  1536                              <1> 	;mov	byte [noclearmem], 0
  1537                              <1> 
  1538                              <1> ; 04/08/2022
  1539                              <1> ; 02/08/2022 (TRDOS 386 Kernel v2.0.5)
  1540                              <1> ; 12/04/2021
  1541                              <1> ; 10/08/2016
  1542                              <1> ; 08/08/2016
  1543                              <1> ; 30/07/2016
  1544                              <1> ; 29/07/2016
  1545                              <1> ; 25/07/2016 - 26/07/2016 - 27/07/2016
  1546                              <1> ; 07/07/2016 - 18/07/2016 - 23/07/2016
  1547                              <1> ; 02/07/2016 - 03/07/2016 - 04/07/2016
  1548                              <1> ; 26/06/2016
  1549                              <1> ; 24/06/2016 (set_txt_mode -> _set_mode)
  1550                              <1> ; 17/06/2016
  1551                              <1> ; 29/05/2016
  1552                              <1> ; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  1553                              <1> 
  1554                              <1> _set_mode:
  1555                              <1> 	; 12/12/2020
  1556                              <1> 	; 26/11/2020
  1557                              <1> 	; call from 'biosfn_set_video_mode'
  1558                              <1> 	;	(bochs/plex86 video bios code)
  1559                              <1> 	; call from 'SET_MODE'
  1560                              <1> 	;	(TRDOS 386 v2 default, IBM PC/AT rom bios code)
  1561                              <1> 	; continue from 'set_txt_mode'	
  1562                              <1> 
  1563                              <1> 	; INPUT:
  1564                              <1> 	;	al = VGA video mode
  1565                              <1> 	; RETURN:
  1566                              <1> 	;	cf = 1 -> video mode not implemented
  1567                              <1> 	;	cf = 0 -> OK
  1568                              <1> 	;
  1569                              <1> 	; Modified registers: eax, bx, ecx, esi, edi, (ebp)
  1570                              <1> 
  1571                              <1> 	; 17/11/2020 (TRDOS v2.0.3)
  1572                              <1> 	; no clear memory option 
  1573                              <1> 	; (from mode number byte bit 7)
  1574 00001B1F 88C4                <1> 	mov	ah, al
  1575 00001B21 80E480              <1> 	and	ah, 80h
  1576                              <1> 	;mov	[noclearmem], al
  1577 00001B24 8825[DB830100]      <1> 	mov	[noclearmem], ah
  1578                              <1> 	;and	al, 7Fh ; clear bit 7
  1579                              <1> 	;;xor	[noclearmem], al ; clear bit 0 to 6
  1580                              <1> 	; 26/11/2020
  1581 00001B2A 30E0                <1> 	xor	al, ah ; and al, 7Fh
  1582                              <1> 
  1583                              <1> 	; 19/11/2020
  1584                              <1> 
  1585                              <1> 	; Video mode 03h action principle:
  1586                              <1> 	;
  1587                              <1> 	; for case 1:
  1588                              <1> 	; Current mode is 03h and next/requested mode is not 03h
  1589                              <1> 	;	- save mode (set mode 03h flag)
  1590                              <1> 	;	- save 8 video pages (which are will be restored)	
  1591                              <1> 	;	- save active page number (which will be reactivated)
  1592                              <1> 	;	- set active page to 0 always (no multi screen)
  1593                              <1> 	;	- save 8 cursor positions (which will be restored)
  1594                              <1> 	; 	- use 'noclearmem' option
  1595                              <1> 	;	[p_crt_mode] = 0 -> 03h 
  1596                              <1> 	;
  1597                              <1> 	; for case 2:
  1598                              <1> 	; Current mode is 03h and next/requested mode is also 03h
  1599                              <1> 	;	- clear active video page if 'noclearmem' is not set
  1600                              <1> 	;	[p_crt_mode] = 0 -> 80h -> 0
  1601                              <1> 	;
  1602                              <1> 	; for case 3:
  1603                              <1> 	; Current mode is not 03h and next/requested mode is 03h
  1604                              <1> 	;	- restore video pages (8 video pages were saved)	
  1605                              <1> 	;	- restore active page number (which were saved)
  1606                              <1> 	;	- restore 8 cursor positions (which were saved)
  1607                              <1> 	;	- reset/clear mode 03h flag
  1608                              <1> 	;	[p_crt_mode] = 03h -> 0
  1609                              <1> 	;
  1610                              <1> 	; for case 4:
  1611                              <1> 	; Current mode is not 03h and next/requested mode is not 03h
  1612                              <1> 	; 	- use 'noclearmem' option
  1613                              <1> 	;	- set active page to 0 always
  1614                              <1> 	;	[p_crt_mode] = 03h -> 83h -> 03h
  1615                              <1> 	;
  1616                              <1> 	; initial (boot time) values:
  1617                              <1> 	;	[p_crt_mode] = 0 ("there isn't a page backup, yet")
  1618                              <1> 	;	  [CRT_MODE] = 3 (kernel's starting mode)
  1619                              <1> 
  1620                              <1> 	; 26/11/2020
  1621 00001B2C 3C03                <1> 	cmp	al, 03h	    ; mode 3, 80x25 text, 16 colors
  1622 00001B2E 7515                <1> 	jne	short _sm_0 ; (default mode for TRDOS 386 mainprog)
  1623                              <1> 
  1624                              <1> 	; case 2 or case 3
  1625                              <1> 
  1626                              <1> 	; check current video mode if it is 03h
  1627 00001B30 08E4                <1> 	or	ah, ah ; 80h or 0 ('noclearmem' option)
  1628 00001B32 7521                <1> 	jnz	short _sm_1 ; do not clear display page
  1629                              <1>  	
  1630                              <1> 	; 26/11/2020
  1631                              <1> 	; Note:
  1632                              <1> 	; [CRT_MODE] = 0FFh for VESA VBE video modes
  1633                              <1> 	; [video_mode] = standard VGA and VESA VBE video modes
  1634                              <1> 	
  1635 00001B34 3805[1E670000]      <1> 	cmp	[CRT_MODE], al	; 03h
  1636 00001B3A 7520                <1> 	jne	short _sm_2	; case 3 ([p_crt_mode] = 03h)
  1637                              <1> 
  1638                              <1> 	; case 2
  1639                              <1> 
  1640                              <1> 	; [p_crt_mode] = 0
  1641                              <1> 
  1642                              <1> 	; 19/11/2020
  1643                              <1> 	; If '_set_mode' procedure is called for video mode 3
  1644                              <1> 	;     while video mode is 3, video page will be cleared
  1645                              <1> 	;     and cursor position of video page will be reset.	 
  1646                              <1> 
  1647                              <1> 	; clear display page
  1648 00001B3C C605[D9830100]80    <1> 	mov	byte [p_crt_mode], 80h ; clear page sign
  1649 00001B43 EB1C                <1> 	jmp	short _sm_3	; bypass save video page routine
  1650                              <1> _sm_0:
  1651                              <1> 	; case 1 or case 4
  1652                              <1> 
  1653                              <1> 	; 05/12/2020
  1654 00001B45 803D[1E670000]03    <1> 	cmp	byte [CRT_MODE], 3 ; is current mode 03h?
  1655 00001B4C 7507                <1> 	jne	short _sm_1	; case 4 ; [p_crt_mode] = 03h
  1656                              <1> 	
  1657                              <1> 	; case 1
  1658                              <1> 	; [p_crt_mode] = 0
  1659                              <1> 
  1660                              <1> 	; 19/11/2020
  1661                              <1> 	; If '_set_mode' procedure is called for a video mode
  1662                              <1> 	;     except video mode 3 while current video mode
  1663                              <1> 	;     is 3, all video pages of mode 3 will be copied 
  1664                              <1> 	;     to 98000h address as backup, before mode change.
  1665                              <1> 	
  1666                              <1> _sm_save_pm:
  1667                              <1> 	; 12/12/2020
  1668                              <1> 	;; 03/07/2016
  1669                              <1> 	;; save video pages
  1670                              <1> 	;mov	esi, 0B8000h
  1671                              <1> 	;mov	edi, 98000h ; 30/07/2016
  1672                              <1> 	;mov	ecx, (0B8000h-0B0000h)/4
  1673                              <1> 	;rep	movsd
  1674                              <1> 
  1675                              <1> 	;mov	byte [p_crt_mode], 3 ; previous mode, backup sign
  1676                              <1> 	;; 26/11/2020
  1677                              <1> 	;xchg	cl, [ACTIVE_PAGE]
  1678                              <1> 	;mov	[p_crt_page], cl  ; save as previous active page
  1679                              <1> 	;
  1680                              <1> 	;; save cursor positions
  1681                              <1> 	;mov	esi, CURSOR_POSN
  1682                              <1> 	;mov	edi, cursor_pposn ; cursor positions backup
  1683                              <1> 	;mov	cl, 4
  1684                              <1> 	;rep	movsd
  1685                              <1> 
  1686                              <1> 	; 12/12/2020
  1687 00001B4E E86E020000          <1> 	call	save_mode3_multiscreen
  1688                              <1> 
  1689                              <1> 	; 29/07/2016
  1690                              <1> 	;;mov	[ACTIVE_PAGE], cl ; 0
  1691                              <1> 	;xchg	cl, [ACTIVE_PAGE]
  1692                              <1> 	;mov	[p_crt_page], cl  ; previous page (for mode 3)
  1693                              <1> 	
  1694                              <1> 	; [ACTIVE_PAGE] = 0 
  1695                              <1> 	
  1696 00001B53 EB07                <1> 	jmp	short _sm_2	; case 1 - 19/11/2020
  1697                              <1> _sm_1:
  1698                              <1> 	; 26/11/2020
  1699                              <1> 	; 19/11/2020
  1700                              <1> 	
  1701                              <1> 	; case 4
  1702 00001B55 800D[D9830100]80    <1> 	or	byte [p_crt_mode], 80h 
  1703                              <1> 				; here [p_crt_mode] must be 83h
  1704                              <1> 				;	  (for case 4)
  1705                              <1> 				; (because video mode 03h
  1706                              <1> 				; was changed before as in case 1)
  1707                              <1> 
  1708                              <1> _sm_2:	; case 4 (jump to _sm_2) - 19/11/2020 
  1709                              <1> 
  1710                              <1> 	; 19/11/2020
  1711                              <1> 	; case 3
  1712                              <1> 	; If '_set_mode' procedure is called for video mode 3
  1713                              <1> 	;     while video mode is not 3 and if there is video
  1714                              <1> 	;     page backup for video mode 3, all (of 8) mode 3
  1715                              <1> 	;     video pages will be restored from 98000h.
  1716                              <1> 
  1717 00001B5C A2[1E670000]        <1> 	mov	[CRT_MODE], al  ; save mode in global variable
  1718                              <1> _sm_3:
  1719                              <1> 	; 04/08/2022 (TRDOS 386 v2.0.5)
  1720                              <1> 	; 30/07/2016
  1721                              <1> 	; 26/07/2016
  1722                              <1> 	; 25/07/2016
  1723                              <1> 	; set_mode_vga:
  1724                              <1> 	; 18/07/2016
  1725                              <1> 	; 14/07/2016
  1726                              <1> 	; 09/07/2016
  1727                              <1> 	; 04/07/2016
  1728                              <1> 	; 03/07/2016 (TRDOS 386 = TRDOS v2.0)
  1729                              <1> 	; /// video mode 13h ///
  1730                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  1731                              <1> 	; vgabios-0.7a (2011)
  1732                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  1733                              <1> 	; 'vgabios.c', 'vgatables.h'
  1734                              <1> 	;
  1735                              <1> 	; Oracle VirtualBox 5.0.24 VGABios Source Code
  1736                              <1> 	; ('vgabios.c', 'vgatables.h', 'vgafonts.h', 'vgarom.asm')
  1737                              <1> 	;
  1738 00001B61 88C4                <1> 	mov	ah, al
  1739 00001B63 B910000000          <1> 	mov	ecx, vga_mode_count
  1740 00001B68 BE[3A670000]        <1> 	mov	esi, vga_modes
  1741 00001B6D 31DB                <1> 	xor	ebx, ebx
  1742                              <1> _sm_4:
  1743 00001B6F AC                  <1> 	lodsb
  1744 00001B70 38C4                <1> 	cmp	ah, al
  1745 00001B72 7406                <1> 	je	short _sm_5
  1746 00001B74 FEC3                <1> 	inc	bl
  1747 00001B76 E2F7                <1> 	loop	_sm_4
  1748                              <1> 
  1749                              <1> 	; UNIMPLEMENTED VIDEO MODE !
  1750                              <1> 	;xor	eax, eax
  1751                              <1>         ;mov	[video_eax], eax ; 0
  1752                              <1> 
  1753                              <1> 	; 26/11/2020
  1754 00001B78 F9                  <1> 	stc	; unimplemented video mode ! (cf=1)
  1755                              <1> 
  1756 00001B79 C3                  <1> 	retn
  1757                              <1> 
  1758                              <1> ;-----	EBX POINTS TO CORRECT ROW OF INITIALIZATION TABLE
  1759                              <1> 
  1760                              <1> _sm_5: 	; 25/07/2016
  1761                              <1> 	;mov	esi, ebx
  1762                              <1> 	;add	esi, vga_memmodel
  1763                              <1> 	;mov	al, [esi]
  1764                              <1> 	; 19/11/2020
  1765 00001B7A 8A83[8A670000]      <1> 	mov	al, [ebx+vga_memmodel]
  1766 00001B80 A2[F2830100]        <1> 	mov	[VGA_MTYPE], al
  1767                              <1> 
  1768 00001B85 89DF                <1> 	mov	edi, ebx
  1769 00001B87 81C7[9A670000]      <1> 	add	edi, vga_dac_s 	
  1770 00001B8D C0E302              <1> 	shl	bl, 2 ; byte -> dword
  1771 00001B90 81C3[4A670000]      <1> 	add	ebx, vga_mode_tbl_ptr
  1772                              <1> 
  1773                              <1> 	;mov	dword [VGA_BASE], 0B8000h
  1774                              <1> 	;cmp	ah, 0Dh ; [CRT_MODE]
  1775                              <1> 	;jb	short M9 
  1776                              <1> 	;mov	dword [VGA_BASE], 0A0000h
  1777                              <1> ;M9:
  1778 00001B96 8B33                <1> 	mov	esi, [ebx]
  1779 00001B98 89F3                <1> 	mov	ebx, esi
  1780 00001B9A 83C614              <1> 	add	esi, vga_p_cm_pos ; ebx + 20
  1781 00001B9D 668B06              <1> 	mov	ax, [esi]       ; get the cursor mode from the table
  1782 00001BA0 66A3[37670000]      <1> 	mov	[CURSOR_MODE], ax ; save cursor mode (initial value)
  1783                              <1> 	; al = 6, ah = 7
  1784                              <1> 	; al = 0Dh, ah = 0Eh ; 25/07/2016
  1785 00001BA6 E893020000          <1> 	call	cursor_shape_fix
  1786                              <1> 	; al = 14, ah = 15 (If [CHAR_HEIGHT] = 16)
  1787 00001BAB 668906              <1> 	mov	[esi], ax
  1788                              <1> 
  1789 00001BAE 56                  <1> 	push	esi ; *	
  1790                              <1> 
  1791                              <1> 	; 17/04/2021
  1792 00001BAF B603                <1> 	mov	dh, 03h
  1793                              <1> 	;
  1794 00001BB1 8A25[25670000]      <1> 	mov	ah, [VGA_MODESET_CTL]
  1795 00001BB7 80E408              <1> 	and	ah, 8 ; default palette loading ?
  1796 00001BBA 7520                <1> 	jnz	short _sm_6
  1797                              <1> 	;mov	dx, 3C6h ; VGAREG_PEL_MASK (DAC mask register)
  1798                              <1> 	; 17/04/2021
  1799 00001BBC B2C6                <1> 	mov	dl, 0C6h
  1800 00001BBE B0FF                <1> 	mov	al, 0FFh ; PEL mask
  1801 00001BC0 EE                  <1> 	out	dx, al
  1802 00001BC1 8A27                <1> 	mov	ah, [edi] ; DAC model (selection number)
  1803 00001BC3 E8F80F0000          <1> 	call	load_dac_palette
  1804                              <1> 	; ecx = 0
  1805 00001BC8 F605[25670000]02    <1> 	test	byte [VGA_MODESET_CTL], 2 ; gray scale summing
  1806 00001BCF 740B                <1> 	jz	short _sm_6
  1807 00001BD1 53                  <1> 	push	ebx
  1808 00001BD2 29DB                <1> 	sub	ebx, ebx ; sub bl, bl
  1809                              <1> 	;mov	cx, 256
  1810                              <1> 	; 02/08/2022
  1811                              <1> 	;sub	ecx, ecx
  1812                              <1> 	; ecx = 0
  1813 00001BD4 FEC5                <1> 	inc	ch
  1814                              <1> 	; ecx = 256
  1815 00001BD6 E837100000          <1> 	call	gray_scale_summing
  1816 00001BDB 5B                  <1> 	pop	ebx	
  1817                              <1> _sm_6:
  1818                              <1> 	; Reset Attribute Ctl flip-flop
  1819                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
  1820                              <1>  	; 17/03/2021
  1821 00001BDC B2DA                <1> 	mov	dl, 0DAh ; dx = 3DAh
  1822 00001BDE EC                  <1> 	in	al, dx
  1823                              <1> 	; Set Attribute Ctl
  1824 00001BDF 89DE                <1> 	mov	esi, ebx ; addr of params tbl for selected mode
  1825 00001BE1 83C623              <1> 	add	esi, 35  ; actl regs
  1826 00001BE4 30E4                <1> 	xor	ah, ah ; 0
  1827                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  1828                              <1> 	; 17/04/2021
  1829 00001BE6 B2C0                <1> 	mov	dl, 0C0h
  1830                              <1> _sm_7:
  1831 00001BE8 88E0                <1> 	mov	al, ah
  1832 00001BEA EE                  <1> 	out	dx, al ; index
  1833 00001BEB AC                  <1> 	lodsb
  1834                              <1> 	; DX = 3C0h = VGAREG_ACTL_WRITE_DATA
  1835 00001BEC EE                  <1> 	out	dx, al ; value
  1836 00001BED FEC4                <1> 	inc	ah
  1837 00001BEF 80FC14              <1> 	cmp	ah, 20 ; number of actl registers
  1838 00001BF2 72F4                <1> 	jb	short _sm_7
  1839                              <1> 	;
  1840 00001BF4 88E0                <1> 	mov	al, ah ; 20
  1841 00001BF6 EE                  <1> 	out	dx, al ; index
  1842 00001BF7 28C0                <1> 	sub	al, al ; 0
  1843 00001BF9 EE                  <1> 	out	dx, al ; value
  1844                              <1> 	;
  1845                              <1> 	; Set Sequencer Ctl
  1846 00001BFA 89DE                <1> 	mov	esi, ebx ; addr of params tbl for selected mode
  1847 00001BFC 83C605              <1> 	add	esi, 5 ; sequ regs
  1848                              <1> 	;
  1849                              <1> 	;mov	dx, 3C4h  ; VGAREG_SEQU_ADDRESS
  1850                              <1> 	; 17/04/2021
  1851 00001BFF B2C4                <1> 	mov	dl, 0C4h
  1852 00001C01 EE                  <1> 	out	dx, al ; 0
  1853                              <1> 	;inc	dx ; 3C5h ; VGAREG_SEQU_DATA
  1854                              <1> 	; 17/04/2021
  1855 00001C02 FEC2                <1> 	inc	dl ; dx = 3C5h	
  1856 00001C04 B003                <1> 	mov	al, 3
  1857 00001C06 EE                  <1> 	out	dx, al
  1858 00001C07 B401                <1> 	mov	ah, 1	
  1859                              <1> _sm_8:
  1860 00001C09 88E0                <1> 	mov	al, ah
  1861                              <1> 	;mov	dx, 3C4h ; VGAREG_SEQU_ADDRESS
  1862                              <1> 	;dec	dx
  1863                              <1> 	; 17/04/2021
  1864 00001C0B FECA                <1> 	dec	dl ; dx = 3C4h
  1865 00001C0D EE                  <1> 	out	dx, al ; index
  1866 00001C0E AC                  <1> 	lodsb
  1867                              <1> 	;inc	dx ; 3C5h ; VGAREG_SEQU_DATA
  1868                              <1> 	; 17/04/2021
  1869 00001C0F FEC2                <1> 	inc	dl
  1870 00001C11 EE                  <1> 	out	dx, al
  1871 00001C12 80FC04              <1> 	cmp	ah, 4 ; number of sequ regs
  1872 00001C15 7304                <1> 	jnb	short _sm_9		
  1873 00001C17 FEC4                <1> 	inc	ah 
  1874 00001C19 EBEE                <1> 	jmp	short _sm_8
  1875                              <1> _sm_9:
  1876                              <1> 	; Set Grafx Ctl
  1877 00001C1B 89DE                <1> 	mov	esi, ebx ; addr of params tbl for selected mode
  1878 00001C1D 83C637              <1> 	add	esi, 55 ; grdc regs
  1879 00001C20 30E4                <1> 	xor	ah, ah ; 0
  1880                              <1> _sm_10:
  1881 00001C22 88E0                <1> 	mov	al, ah
  1882                              <1> 	;mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  1883                              <1> 	; 17/04/2021
  1884 00001C24 B2CE                <1> 	mov	dl, 0CEh
  1885 00001C26 EE                  <1> 	out	dx, al	
  1886 00001C27 AC                  <1> 	lodsb
  1887                              <1> 	;inc	dx ; 3CFh ; VGAREG_GRDC_DATA
  1888                              <1> 	; 17/04/2021
  1889 00001C28 FEC2                <1> 	inc	dl ; 3CFh
  1890 00001C2A EE                  <1> 	out	dx, al
  1891 00001C2B FEC4                <1> 	inc	ah
  1892 00001C2D 80FC09              <1> 	cmp	ah, 9 ; number of grdc regs
  1893 00001C30 72F0                <1> 	jb	short _sm_10
  1894                              <1> 	;
  1895                              <1> 	; Disable CRTC write protection
  1896                              <1> 	;mov	dx, 3D4h  ; VGAREG_VGA_CRTC_ADDRESS
  1897                              <1> 	; 17/04/2021
  1898 00001C32 B2D4                <1> 	mov	dl, 0D4h
  1899                              <1> 	;mov	al, 11h
  1900                              <1> 	;out	dx, al
  1901                              <1> 	;inc	dx
  1902                              <1> 	;sub	al, al
  1903                              <1> 	;out	dx, al
  1904 00001C34 66B81100            <1> 	mov	ax, 11h
  1905 00001C38 66EF                <1> 	out	dx, ax
  1906 00001C3A 89DE                <1> 	mov	esi, ebx ; addr of params tbl for selected mode
  1907 00001C3C 83C60A              <1> 	add	esi, 10 ; crtc regs
  1908                              <1> 	; ah = 0
  1909                              <1> _sm_11:
  1910 00001C3F 88E0                <1> 	mov	al, ah
  1911                              <1> 	; dx = 3D4h = VGAREG_VGA_CRTC_ADDRESS
  1912 00001C41 EE                  <1> 	out	dx, al ; index
  1913 00001C42 AC                  <1> 	lodsb
  1914                              <1> 	;inc	dx  ; VGAREG_VGA_CRTC_ADDRESS + 1
  1915                              <1> 	; 17/04/2021
  1916 00001C43 FEC2                <1> 	inc	dl
  1917 00001C45 EE                  <1> 	out	dx, al ; value
  1918 00001C46 80FC18              <1> 	cmp	ah, 24 ; number of crtc registers - 1
  1919 00001C49 7306                <1> 	jnb	short _sm_12
  1920 00001C4B FEC4                <1> 	inc	ah
  1921                              <1> 	;dec	dx ; 3D4h
  1922                              <1> 	; 17/04/2021
  1923 00001C4D FECA                <1> 	dec	dl
  1924 00001C4F EBEE                <1> 	jmp	short _sm_11
  1925                              <1> _sm_12:
  1926                              <1> 	; Set the misc register
  1927                              <1> 	;mov	dx, 3CCh ; VGAREG_READ_MISC_OUTPUT
  1928                              <1> 	; 17/04/2021
  1929 00001C51 B2CC                <1> 	mov	dl, 0CCh
  1930 00001C53 8A4309              <1> 	mov	al, [ebx+9] ; misc reg
  1931 00001C56 EE                  <1> 	out	dx, al
  1932                              <1> 	;
  1933                              <1> 	; Enable video
  1934                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  1935                              <1> 	; 17/04/2021
  1936 00001C57 B2C0                <1> 	mov	dl, 0C0h
  1937 00001C59 B020                <1> 	mov	al, 20h  
  1938 00001C5B EE                  <1>         out     dx, al   ; set bit 5 to 1
  1939                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
  1940                              <1> 	; 17/04/2021
  1941 00001C5C B2DA                <1> 	mov	dl, 0DAh
  1942 00001C5E EC                  <1> 	in	al, dx
  1943                              <1> 	;
  1944                              <1> 	; 17/11/2020
  1945                              <1> 	;cmp	byte [noclearmem], 0
  1946                              <1>         ;ja	short _sm_15
  1947                              <1> 
  1948 00001C5F F605[DB830100]80    <1> 	test	byte [noclearmem], 80h
  1949 00001C66 753B                <1> 	jnz	short _sm_15	
  1950                              <1> 
  1951                              <1> 	; 29/07/2016
  1952 00001C68 31C0                <1> 	xor	eax, eax
  1953                              <1> 	;mov	ecx, 4000h ; 16K words (32K)
  1954                              <1> 	; 02/08/2022
  1955 00001C6A 29C9                <1> 	sub	ecx, ecx
  1956 00001C6C B540                <1> 	mov	ch, 40h
  1957                              <1> 	; ecx = 4000h 
  1958 00001C6E 803D[F2830100]02    <1> 	cmp     byte [VGA_MTYPE], 2  ; CTEXT, MTEXT, CGA
  1959 00001C75 7715                <1> 	ja	short _sm_14    ; no ? (0A0000h)
  1960 00001C77 BF00800B00          <1> 	mov	edi, 0B8000h
  1961 00001C7C 7409                <1> 	je	short _sm_13	; CGA graphics mode
  1962                              <1> 	; 08/08/2016
  1963 00001C7E A3[EE830100]        <1> 	mov	[VGA_INT43H], eax ; 0 ; default font 
  1964 00001C83 66B82007            <1> 	mov	ax, 0720h	; CGA text mode
  1965                              <1> _sm_13:
  1966 00001C87 F366AB              <1> 	rep	stosw
  1967 00001C8A EB17                <1> 	jmp	short _sm_15
  1968                              <1> 
  1969                              <1> _sm_14:
  1970 00001C8C BF00000A00          <1> 	mov	edi, 0A0000h
  1971                              <1> 	; ecx = 16384 dwords (64K)
  1972                              <1> 	;mov	dx, 3C4h ; VGAREG_SEQU_ADDRESS
  1973                              <1> 	; 17/04/2021
  1974 00001C91 B2C4                <1> 	mov	dl, 0C4h
  1975 00001C93 B002                <1> 	mov	al, 2
  1976 00001C95 EE                  <1> 	out	dx, al
  1977                              <1> 	;mov	dx, 3C5h ; VGAREG_SEQU_DATA
  1978                              <1> 	;inc	dx
  1979                              <1> 	; 17/04/2021
  1980 00001C96 FEC2                <1> 	inc	dl ; 3C5h
  1981 00001C98 EC                  <1> 	in	al, dx ; mmask
  1982                              <1> 	;push	ax
  1983                              <1> 	; 12/04/2021
  1984 00001C99 50                  <1> 	push	eax
  1985 00001C9A B00F                <1> 	mov	al, 0Fh ; all planes
  1986 00001C9C EE                  <1> 	out	dx, al
  1987 00001C9D 30C0                <1> 	xor	al, al ; 0
  1988 00001C9F F3AB                <1> 	rep	stosd	; ecx = 163684 (64K)
  1989                              <1> 	;pop	ax
  1990                              <1> 	; 12/04/2021
  1991 00001CA1 58                  <1> 	pop	eax
  1992 00001CA2 EE                  <1> 	out	dx, al  ; mmask
  1993                              <1> _sm_15:
  1994                              <1> 	; ebx = addr of params tbl for selected mode
  1995                              <1> 	; 10/08/2016
  1996 00001CA3 668B03              <1> 	mov	ax, [ebx] ; num of columns, 'twidth'
  1997 00001CA6 A2[20670000]        <1> 	mov	[CRT_COLS], al
  1998                              <1> 	;; 26/07/2016
  1999                              <1> 	;; CRTC_ADDRESS = 3D4h (always)
  2000                              <1> 	;mov	ah, [ebx+1] ; num of rows, 'theightm1'
  2001 00001CAB FEC4                <1> 	inc	ah ; 09/07/2016
  2002 00001CAD 8825[26670000]      <1> 	mov	[VGA_ROWS], ah
  2003                              <1> 	; 10/08/2016
  2004 00001CB3 8A4302              <1> 	mov	al, [ebx+2]
  2005 00001CB6 A2[22670000]        <1> 	mov	[CHAR_HEIGHT], al 
  2006                              <1> 	; 29/07/2016
  2007                              <1> 	; length of regen buffer in bytes
  2008 00001CBB 668B4B03            <1> 	mov	cx, [ebx+3] ; 'slength_l'
  2009 00001CBF 66890D[DC830100]    <1> 	mov	[CRT_LEN], cx
  2010                              <1> 	;
  2011                              <1> 	; 27/07/2016
  2012 00001CC6 30E4                <1> 	xor	ah, ah
  2013 00001CC8 A0[76770100]        <1> 	mov	al, [ACTIVE_PAGE] ; may be > 0 for mode 3
  2014                              <1> 	;mul	word [CRT_LEN] ; 4096 for mode 3
  2015 00001CCD 66F7E1              <1> 	mul	cx ; 29/07/2016
  2016 00001CD0 66A3[64770100]      <1> 	mov	[CRT_START], ax
  2017                              <1> 	;
  2018 00001CD6 B060                <1> 	mov	al, 60h
  2019                              <1> 	;cmp	byte [noclearmem], 0
  2020                              <1> 	;jna	short _sm_16
  2021                              <1> 	;add	al, 80h
  2022 00001CD8 0A05[DB830100]      <1> 	or	al, [noclearmem] ; 17/11/2020
  2023                              <1> _sm_16:
  2024 00001CDE A2[23670000]        <1> 	mov	[VGA_VIDEO_CTL], al
  2025 00001CE3 C605[24670000]F9    <1> 	mov	byte [VGA_SWITCHES], 0F9h
  2026 00001CEA 8025[25670000]7F    <1> 	and	byte [VGA_MODESET_CTL], 7Fh
  2027                              <1> 
  2028 00001CF1 5E                  <1> 	pop	esi ; *
  2029                              <1> 
  2030                              <1> 	; 26/07/2016
  2031                              <1> 	; 07/07/2016
  2032 00001CF2 668B0D[37670000]    <1> 	mov	cx, [CURSOR_MODE] ; restore cursor mode (initial value)
  2033 00001CF9 66870E              <1> 	xchg	cx, [esi] ; cl = start line, ch = end line
  2034                              <1> 			  ; reset to initial value
  2035 00001CFC 86E9                <1> 	xchg 	ch, cl  ; ch = start line, cl = end line  
  2036 00001CFE 66890D[37670000]    <1> 	mov	[CURSOR_MODE], cx ; save (fixed) cursor mode
  2037                              <1> 
  2038                              <1> 	; 27/07/2016
  2039 00001D05 803D[F2830100]02    <1> 	cmp	byte [VGA_MTYPE], 2 ; CTEXT, MTEXT
  2040 00001D0C 7317                <1> 	jnb	short _sm_17
  2041                              <1> 
  2042                              <1> 	; Set cursor shape
  2043                              <1> 	;mov	cx, 0607h
  2044                              <1> 	;call	_set_ctype
  2045                              <1> 
  2046                              <1> 	; 29/07/2016
  2047 00001D0E B40A                <1> 	mov	ah, 10	; 6845 register for cursor set
  2048 00001D10 E81F060000          <1> 	call	m16	; output cx register
  2049                              <1> 	
  2050                              <1> 	; 25/07/2016
  2051 00001D15 803D[1E670000]03    <1>         cmp     byte [CRT_MODE], 03h
  2052 00001D1C 7507                <1> 	jne	short _sm_17
  2053                              <1> 	; 26/07/2016
  2054                              <1> 
  2055 00001D1E A0[76770100]        <1> 	mov	al, [ACTIVE_PAGE]
  2056 00001D23 EB0B                <1> 	jmp	short _sm_18
  2057                              <1> _sm_17:
  2058                              <1> 	; Set cursor pos for page 0..7
  2059                              <1> 	;sub	ax, ax ; eax = 0
  2060 00001D25 29C0                <1> 	sub	eax, eax ; 17/11/2020
  2061 00001D27 BF[66770100]        <1> 	mov	edi, CURSOR_POSN
  2062 00001D2C AB                  <1> 	stosd	
  2063 00001D2D AB                  <1> 	stosd
  2064 00001D2E AB                  <1> 	stosd
  2065 00001D2F AB                  <1> 	stosd
  2066                              <1> 	;; Set active page 0
  2067                              <1> 	;mov	[ACTIVE_PAGE], al ; 0
  2068                              <1> _sm_18:
  2069                              <1> 	; 29/07/2016
  2070 00001D30 803D[F2830100]02    <1> 	cmp	byte [VGA_MTYPE], 2 ; CTEXT, MTEXT
  2071                              <1> 	;jnb	_sm_23
  2072                              <1> 	; 04/08/2022
  2073 00001D37 7205                <1> 	jb	short _sm_24
  2074 00001D39 E90C020000          <1> 	jmp	_set_active_page
  2075                              <1> _sm_24:
  2076                              <1> 	;cmp	byte [CHAR_HEIGHT], 16
  2077                              <1> 	;je	short _sm_19
  2078                              <1> 
  2079                              <1>  	;; copy and activate 8x16 font
  2080                              <1> 	
  2081                              <1> 	; 26/07/2016
  2082 00001D3E B004                <1> 	mov	al, 04h
  2083                              <1> 	;sub	bl, bl
  2084                              <1> 	; AX = 1104H ; Load ROM 8x16 Character Set
  2085                              <1> 	; (BL = font block to load (EGA: 0-3; VGA: 0-7))
  2086 00001D40 E844160000          <1> 	call	load_text_8_16_pat
  2087                              <1> 
  2088                              <1> 	; video_func_1103h:
  2089                              <1> 	; biosfn_set_text_block_specifier:
  2090                              <1> 	; BL = font block selector code	
  2091                              <1> 	; NOTE: TRDOS 386 only uses and sets font block 0
  2092                              <1> 	; (It is as BL = 0 for TRDOS 386)
  2093 00001D45 66BAC403            <1> 	mov	dx, 3C4h ; VGAREG_SEQU_ADDRESS
  2094                              <1> 	;;mov	ah, bl
  2095                              <1> 	;sub	ah, ah ; 0
  2096                              <1> 	;mov	al, 03h
  2097                              <1> 	; 19/11/2020
  2098 00001D49 66B80300            <1> 	mov	ax, 03h
  2099 00001D4D 66EF                <1> 	out	dx, ax
  2100                              <1> _sm_19:
  2101                              <1> 	; 29/07/2016
  2102                              <1> 	; 26/07/2016
  2103                              <1> 	; 24/06/2016
  2104                              <1> 	;mov	edi, 0B8000h
  2105                              <1> 	;mov	cx, 4000h ; 16K words (32K)
  2106                              <1> 	;
  2107 00001D4F 30C0                <1> 	xor	al, al
  2108 00001D51 3805[D9830100]      <1>         cmp     [p_crt_mode], al ; 0 
  2109 00001D57 7705                <1>         ja      short _sm_20 ; 03h, 80h or 83h
  2110                              <1> 
  2111                              <1> 	; case 1 - 19/11/2020
  2112                              <1> 	;
  2113                              <1> 	; If [pc_crt_mode] = 0, that means, previous mode is 03h
  2114                              <1> 	; and current mode is not 03h (case 1)
  2115                              <1> 
  2116                              <1> 	; 30/07/2016
  2117                              <1> 	; 24/06/2016
  2118                              <1> 	; TRDOS 386 (TRDOS v2) 'set mode' modification
  2119                              <1> 	; (for multiscreen feature):
  2120                              <1> 	; If '_set_mode' procedure is called for video mode 3
  2121                              <1> 	;     while video mode is 3, video page will be cleared
  2122                              <1> 	;     and cursor position of video page will be reset.
  2123                              <1> 	; If '_set_mode' procedure is called for a video mode
  2124                              <1> 	;     except video mode 3, while current video mode
  2125                              <1> 	;     is 3, all video pages of mode 3 will be copied 
  2126                              <1> 	;     to 98000h address as backup, before mode change.
  2127                              <1> 	; If '_set_mode' procedure is called for video mode 3
  2128                              <1> 	;     while video mode is not 3 and if there is video
  2129                              <1> 	;     page backup for video mode 3, all (of 8) mode 3
  2130                              <1> 	;     video pages will be restored from 98000h.
  2131                              <1> 
  2132                              <1> 	; 19/11/2020
  2133                              <1> 	;mov	[ACTIVE_PAGE], al ; 0
  2134                              <1> 
  2135                              <1> 	; Here,
  2136                              <1> 	; video memory already cleared if [noclearmem] <> 80h
  2137                              <1> 	
  2138                              <1> 	;mov	ax, 0720h
  2139                              <1> 	;mov	cx, 4000h ; 16K words (32K)
  2140                              <1> 	;mov	edi, 0B8000h
  2141                              <1> 	;rep	stosw
  2142                              <1> 	;sub	al, al
  2143                              <1> 	
  2144                              <1> 	;jmp	short _sm_23
  2145                              <1> 
  2146                              <1> 	; Set hardware side for the new active video page
  2147                              <1>  
  2148 00001D59 E9EC010000          <1> 	jmp	_set_active_page ; 19/11/2020	
  2149                              <1> 
  2150                              <1> _sm_20:
  2151                              <1> 	; 19/11/2020
  2152                              <1> 	; case 2 or case 3 or case 4 - 19/11/2020
  2153                              <1> 	
  2154                              <1> 	; 19/11/2020
  2155 00001D5E 803D[1E670000]03    <1> 	cmp	byte [CRT_MODE], 3  ; new video mode
  2156 00001D65 754E                <1> 	jne	short _sm_22 ; al = 0 (& video mode <> 03h)
  2157                              <1> 			     ; case 4 - 19/11/2020
  2158                              <1> 			     ; ([p_crt_mode] = 83h)
  2159                              <1> 
  2160                              <1> 	; case 2 or case 3 - 19/11/2020	
  2161                              <1> 
  2162                              <1> 	;movzx	ebx, byte [ACTIVE_PAGE]
  2163                              <1> 	; 19/11/2020
  2164 00001D67 A0[DA830100]        <1> 	mov	al, [p_crt_page] ; previous mode 3 active page
  2165                              <1> 	;movzx	ebx, al
  2166                              <1> 	;shl	bl, 1 ; * 2
  2167                              <1> 	;add	ebx, CURSOR_POSN
  2168                              <1> 
  2169                              <1> 	; 29/07/2016
  2170 00001D6C F605[D9830100]7F    <1> 	test    byte [p_crt_mode], 7Fh ; 83h or 80h or 03h
  2171 00001D73 740F                <1> 	jz	short _sm_21	; do not restore video pages
  2172                              <1> 				; case 2 - 19/11/2020 
  2173                              <1> 	; case 3 - 19/11/2020
  2174                              <1> 
  2175                              <1> 	; ([p_crt_mode] = 03h)
  2176                              <1> 
  2177                              <1> 	; New video mode is 3 while current video mode is not 3
  2178                              <1> 	; (multi screen) video pages will be restored from 098000h
  2179                              <1> 
  2180                              <1> 	; 19/11/2020
  2181 00001D75 A2[76770100]        <1> 	mov	[ACTIVE_PAGE], al ; current mode 3 active page
  2182                              <1> 
  2183                              <1> 	; 12/12/2020
  2184                              <1> 	;; restore video pages
  2185                              <1> 	;mov	esi, 98000h ; 30/07/2016 
  2186                              <1> 	;mov	edi, 0B8000h
  2187                              <1> 	;mov	cx, 2000h ; 8K dwords (32K)
  2188                              <1> 	;rep	movsd
  2189                              <1> 	;
  2190                              <1> 	;; 19/11/2020
  2191                              <1> 	;mov	[p_crt_mode], cl ; reset ('case 3' end condition)
  2192                              <1> 	;
  2193                              <1> 	;; restore cursor positions
  2194                              <1> 	;mov	esi, cursor_pposn
  2195                              <1> 	;mov	edi, CURSOR_POSN
  2196                              <1> 	;;mov	ecx, 4	; restore all cursor positions (16 bytes)
  2197                              <1> 	;mov	cl, 4
  2198                              <1> 	;rep 	movsd
  2199                              <1> 	
  2200                              <1> 	; 12/12/2020
  2201 00001D7A E89A000000          <1> 	call	_restore_mode3_multiscreen
  2202                              <1> 
  2203                              <1> 	;jmp	short _sm_23 ; do not clear current video pages
  2204                              <1> 
  2205                              <1> 	; 19/11/2020
  2206 00001D7F E9C6010000          <1> 	jmp	_set_active_page
  2207                              <1> 
  2208                              <1> _sm_21:
  2209                              <1> 	; 19/11/2020
  2210                              <1> 	; case 2 
  2211                              <1> 	;
  2212                              <1> 	; ([p_crt_mode] = 80h)
  2213                              <1> 	;
  2214                              <1> 	; User has requested to set video mode 3 again while
  2215                              <1> 	; current video mode is 3.. that means, set mode 03h
  2216                              <1> 	; parameters again and clear video page.
  2217                              <1> 	; ('noclearmem' option effects the result) 
  2218                              <1> 	
  2219                              <1> 	; 19/11/2020
  2220 00001D84 F605[DB830100]80    <1> 	test	byte [noclearmem], 80h
  2221 00001D8B 7528                <1> 	jnz	short _sm_22	; 'do not clear video memory'
  2222                              <1> 				; continue with current text
  2223                              <1> 				; (user's option/choice) 
  2224                              <1> 	; clear video page
  2225                              <1> 	;mov	cx, [CRT_LEN] ; 4096
  2226                              <1> 	;shr	cx, 1 ; 2048 ; 16/11/2020
  2227 00001D8D 66B82007            <1> 	mov	ax, 0720h
  2228                              <1> 	; 26/11/2020
  2229                              <1> 	;mov	ecx, 2048 ; 4096/2
  2230                              <1> 	; 02/08/2022
  2231 00001D91 29C9                <1> 	sub	ecx, ecx
  2232 00001D93 B508                <1> 	mov	ch, 08h
  2233                              <1> 	; ecx = 0800h
  2234 00001D95 BF00800B00          <1> 	mov	edi, 0B8000h ; [crt_base]
  2235 00001D9A 66033D[64770100]    <1> 	add	di, [CRT_START]
  2236 00001DA1 F366AB              <1> 	rep	stosw	; FILL THE REGEN BUFFER WITH BLANKS
  2237                              <1> 	;
  2238                              <1> 	; 19/11/2020
  2239 00001DA4 A0[76770100]        <1> 	mov	al, [ACTIVE_PAGE] ; 0 to 7 (for video mode 3)
  2240 00001DA9 0FB6D8              <1> 	movzx	ebx, al
  2241 00001DAC D0E3                <1> 	shl	bl, 1
  2242 00001DAE 66898B[66770100]    <1> 	mov	[ebx+CURSOR_POSN], cx ; reset cursor position
  2243                              <1> _sm_22:
  2244                              <1> 	;mov	[p_crt_mode], al ; 0 ; reset
  2245                              <1> 	; 19/11/2020
  2246                              <1> 	;and	byte [p_crt_mode], 3 ; 83h -> 3, 80h -> 0  
  2247 00001DB5 8025[D9830100]7F    <1> 	and	byte [p_crt_mode], 7Fh ; 83h -> 3, 80h -> 0
  2248                              <1> _sm_23:
  2249                              <1> 	; al = video page number
  2250                              <1> 	; [CRT_LEN] = length of regen buffer in bytes
  2251                              <1> 	;call	_set_active_page
  2252                              <1> 	; 16/11/2020
  2253 00001DBC E989010000          <1> 	jmp	_set_active_page
  2254                              <1> 
  2255                              <1> ;-----	NORMAL RETURN FROM ALL VIDEO RETURNS
  2256                              <1> 	;retn
  2257                              <1> 
  2258                              <1> save_mode3_multiscreen:
  2259                              <1> 	; 02/08/2022 (TRDOS v2.0.5)
  2260                              <1> 	; 12/12/2020 (TRDOS v2.0.3)
  2261                              <1> 	; save mode 03h video pages and cursor positions
  2262                              <1> 	;
  2263                              <1> 	; Modified registers: ecx (=0), esi, edi
  2264                              <1> 	
  2265                              <1> 	; 12/12/2020
  2266                              <1> 	; moved here from '_set_mode'	
  2267                              <1> 	; 03/07/2016
  2268                              <1> 	; save video pages
  2269 00001DC1 BE00800B00          <1> 	mov	esi, 0B8000h
  2270 00001DC6 BF00800900          <1> 	mov	edi, 98000h ; 30/07/2016
  2271                              <1> 	;mov	ecx, (0B8000h-0B0000h)/4
  2272                              <1> 	; 02/08/2022
  2273 00001DCB 29C9                <1> 	sub	ecx, ecx
  2274 00001DCD B520                <1> 	mov	ch, 20h
  2275                              <1> 	; ecx = 2000h 
  2276 00001DCF F3A5                <1> 	rep	movsd
  2277                              <1> 	
  2278 00001DD1 C605[D9830100]03    <1> 	mov	byte [p_crt_mode], 3 ; previous mode, backup sign
  2279                              <1> 	; 26/11/2020
  2280 00001DD8 860D[76770100]      <1> 	xchg	cl, [ACTIVE_PAGE]
  2281 00001DDE 880D[DA830100]      <1> 	mov	[p_crt_page], cl  ; save as previous active page
  2282                              <1> 	
  2283                              <1> 	; save cursor positions
  2284 00001DE4 BE[66770100]        <1> 	mov	esi, CURSOR_POSN
  2285 00001DE9 BF[DE830100]        <1> 	mov	edi, cursor_pposn ; cursor positions backup
  2286 00001DEE B104                <1> 	mov	cl, 4
  2287 00001DF0 F3A5                <1> 	rep	movsd
  2288 00001DF2 C3                  <1> 	retn
  2289                              <1> 
  2290                              <1> restore_mode3_multiscreen:
  2291                              <1> 	; 02/08/2022 (TRDOS v2.0.5)
  2292                              <1> 	; 12/12/2020 (TRDOS v2.0.3)
  2293                              <1> 	; restore mode 03h video pages and cursor positions
  2294                              <1> 	;
  2295                              <1> 	; Input:
  2296                              <1> 	;    settings from the last 'save_mode3_multiscreen'
  2297                              <1> 	;
  2298                              <1> 	; Output: 
  2299                              <1> 	;    AL = active video page = [ACTIVE_PAGE]
  2300                              <1> 	;
  2301                              <1> 	; Modified registers: al, ecx (=0), esi, edi
  2302                              <1> 
  2303 00001DF3 A0[DA830100]        <1> 	mov	al, [p_crt_page] ; previous mode 3 active page
  2304 00001DF8 A2[76770100]        <1> 	mov	[ACTIVE_PAGE], al ; current mode 3 active page
  2305                              <1> 
  2306                              <1> 	; 12/12/2020
  2307                              <1> 	; moved here from 'vesa_vbe3_pmi'	
  2308                              <1> 
  2309                              <1> 	; 07/12/2020
  2310                              <1> 	; restore CRT_START according to ACTIVE_PAGE
  2311                              <1> 	;mov	[CRT_START], cx ; 0
  2312                              <1> 	; 12/12/2020
  2313 00001DFD 66C705[64770100]00- <1> 	mov	word [CRT_START], 0
  2313 00001E05 00                  <1>
  2314                              <1> 
  2315                              <1> 	; check active page and set it again if it is not 0
  2316 00001E06 08C0                <1> 	or	al, al
  2317                              <1> 	;;jz	short vbe3_pmi_7
  2318                              <1> 	;jz	short _restore_mode3_multiscreen
  2319 00001E08 740F                <1> 	jz	short r_m3_ms_1
  2320 00001E0A 88C1                <1> 	mov	cl, al
  2321                              <1> ;vbe3_pmi_5:
  2322                              <1> r_m3_ms_0:
  2323 00001E0C 668105[64770100]00- <1> 	add	word [CRT_START], 4096
  2323 00001E14 10                  <1>
  2324 00001E15 FEC9                <1> 	dec	cl
  2325                              <1> 	;jnz	short vbe3_pmi_5
  2326 00001E17 75F3                <1> 	jnz	short r_m3_ms_0
  2327                              <1> r_m3_ms_1:
  2328                              <1> 	; 12/12/2020
  2329                              <1> 	; moved here from '_set_mode'	
  2330                              <1> _restore_mode3_multiscreen:
  2331                              <1> 	; Modified registers: ecx, esi, edi
  2332                              <1> 
  2333                              <1> 	; restore video pages
  2334 00001E19 BE00800900          <1> 	mov	esi, 98000h ; 30/07/2016 
  2335 00001E1E BF00800B00          <1> 	mov	edi, 0B8000h
  2336                              <1> 	;mov	cx, 2000h ; 8K dwords (32K)
  2337                              <1> 	;mov	ecx, 2000h
  2338                              <1> 	; 02/08/2022
  2339 00001E23 29C9                <1> 	sub	ecx, ecx
  2340 00001E25 B520                <1> 	mov	ch, 20h
  2341                              <1> 	; ecx = 2000h 
  2342 00001E27 F3A5                <1> 	rep	movsd
  2343                              <1> 
  2344                              <1> 	; 19/11/2020
  2345 00001E29 880D[D9830100]      <1> 	mov	[p_crt_mode], cl ; reset ('case 3' end condition)
  2346                              <1> 
  2347                              <1> 	; restore cursor positions
  2348 00001E2F BE[DE830100]        <1> 	mov	esi, cursor_pposn
  2349 00001E34 BF[66770100]        <1> 	mov	edi, CURSOR_POSN
  2350                              <1> 	;mov	ecx, 4	; restore all cursor positions (16 bytes)
  2351 00001E39 B104                <1> 	mov	cl, 4
  2352 00001E3B F3A5                <1> 	rep 	movsd
  2353 00001E3D C3                  <1> 	retn
  2354                              <1> 
  2355                              <1> cursor_shape_fix:
  2356                              <1> 	; 12/04/2021
  2357                              <1> 	; 07/07/2016
  2358                              <1> 	; (Cursor start and cursor end line values -6,7-
  2359                              <1> 	; will be fixed depending on character height)
  2360                              <1> 	;
  2361                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  2362                              <1> 	; vgabios-0.7a (2011)
  2363                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  2364                              <1> 	; 'vgabios.c', ' biosfn_set_cursor_shape (CH,CL)'
  2365                              <1> 	;
  2366                              <1> 	; INPUT ->
  2367                              <1> 	;	AL = cursor start line (=6)
  2368                              <1> 	;	AH = cursor end line (=7)
  2369                              <1> 	; OUTPUT ->
  2370                              <1> 	;	AL = cursor start line (=14)
  2371                              <1> 	;	AH = cursor end line (=15)
  2372                              <1> 	;
  2373                              <1> 	;; if((modeset_ctl&0x01)&&(cheight>8)&&(CL<8)&&(CH<0x20))
  2374                              <1> 
  2375                              <1> 	;test	byte [VGA_MODESET_CTL], 1 ; VGA active
  2376                              <1> 	;jz	short csf_3
  2377 00001E3E 803D[22670000]08    <1> 	cmp	byte [CHAR_HEIGHT], 8
  2378 00001E45 7647                <1> 	jna	short csf_3
  2379 00001E47 80FC08              <1> 	cmp	ah, 8
  2380 00001E4A 7342                <1> 	jnb	short csf_3
  2381 00001E4C 3C20                <1> 	cmp	al, 20h
  2382 00001E4E 733E                <1> 	jnb	short csf_3
  2383                              <1> 	;
  2384                              <1> 	;push	ax
  2385                              <1> 	; 12/04/2021
  2386 00001E50 50                  <1> 	push	eax
  2387                              <1> 	; {
  2388                              <1>    	; if(CL!=(CH+1))	
  2389 00001E51 FEC0                <1> 	inc	al
  2390 00001E53 38C4                <1> 	cmp	ah, al   ; ah != al + 1
  2391 00001E55 740F                <1>         je      short csf_1
  2392                              <1> 	; CH = ((CH+1) * cheight / 8) -1;
  2393 00001E57 8A25[22670000]      <1> 	mov	ah, [CHAR_HEIGHT]
  2394 00001E5D F6E4                <1> 	mul	ah
  2395 00001E5F C0E803              <1> 	shr	al, 3 ; / 8
  2396 00001E62 FEC8                <1> 	dec	al ; - 1
  2397 00001E64 EB0E                <1> 	jmp	short csf_2 
  2398                              <1> csf_1: 	
  2399                              <1>  	; }
  2400                              <1>    	; else		; ah = al + 1
  2401                              <1>     	; {
  2402 00001E66 FEC4                <1> 	inc	ah	; ah = ah + 1   
  2403                              <1> 	; CH = ((CL+1) * cheight / 8) - 2;
  2404 00001E68 A0[22670000]        <1> 	mov	al, [CHAR_HEIGHT]
  2405 00001E6D F6E4                <1> 	mul	ah
  2406 00001E6F C0E803              <1> 	shr	al, 3 ; / 8
  2407 00001E72 2C02                <1> 	sub	al, 2 ; - 2
  2408                              <1> 	; al = 14 (if [CHAR_HEIGHT] = 16)
  2409                              <1> csf_2:
  2410 00001E74 880424              <1> 	mov	[esp], al
  2411 00001E77 8A642401            <1> 	mov	ah, [esp+1]
  2412                              <1> 	; CL = ((CL+1) * cheight / 8) - 1;
  2413 00001E7B FEC4                <1> 	inc	ah 
  2414 00001E7D A0[22670000]        <1> 	mov	al, [CHAR_HEIGHT]
  2415 00001E82 F6E4                <1> 	mul	ah
  2416 00001E84 C0E803              <1> 	shr	al, 3 ; / 8
  2417 00001E87 FEC8                <1> 	dec	al ; - 1
  2418 00001E89 88442401            <1> 	mov	[esp+1], al
  2419                              <1> 	; ah = 15 (if [CHAR_HEIGHT] = 16)
  2420                              <1> 	;
  2421                              <1> 	;pop	ax
  2422                              <1> 	; 12/04/2021
  2423 00001E8D 58                  <1> 	pop	eax
  2424                              <1> csf_3:
  2425 00001E8E C3                  <1> 	retn
  2426                              <1> 
  2427                              <1> SET_CTYPE:
  2428                              <1> 	; 04/08/2022 (TRDOS 386 v2.0.5)
  2429                              <1> 	; 12/09/2016
  2430                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  2431 00001E8F 803D[1E670000]07    <1> 	cmp	byte [CRT_MODE], 7
  2432                              <1> 	;ja	VIDEO_RETURN ; 12/09/2016
  2433                              <1> 	; 04/08/2022
  2434 00001E96 7738                <1> 	ja	short set_cpos_inv_vp
  2435 00001E98 E805000000          <1> 	call	_set_ctype
  2436 00001E9D E96CFCFFFF          <1>         jmp     VIDEO_RETURN
  2437                              <1> 
  2438                              <1> _set_ctype:
  2439                              <1> 	; 02/09/2014 (Retro UNIX 386 v1)
  2440                              <1> 	;
  2441                              <1> 	; VIDEO.ASM - 06/10/85  VIDEO DISPLAY BIOS
  2442                              <1> 
  2443                              <1> 	; (CH) = BITS 4-0 = START LINE FOR CURSOR
  2444                              <1> 	;  ** HARDWARE WILL ALWAYS CAUSE BLINK
  2445                              <1> 	;  ** SETTING BIT 5 OR 6 WILL CAUSE ERRATIC BLINKING
  2446                              <1> 	;     OR NO CURSOR AT ALL
  2447                              <1> 	; (CL) = BITS 4-0 = END LINE FOR CURSOR
  2448                              <1> 
  2449                              <1> ;------------------------------------------------
  2450                              <1> ; SET_CTYPE
  2451                              <1> ;	THIS ROUTINE SETS THE CURSOR VALUE
  2452                              <1> ; INPUT
  2453                              <1> ;	(CX) HAS CURSOR VALUE CH-START LINE, CL-STOP LINE
  2454                              <1> ; OUTPUT	
  2455                              <1> ;	NONE
  2456                              <1> ;------------------------------------------------
  2457                              <1> 	
  2458                              <1> 	; 02/08/2022 (TRDOS 386 Kernel v2.0.5)
  2459                              <1> 	;
  2460                              <1> 	; 07/07/2016
  2461                              <1> 	; Fixing cursor start and stop line depending on
  2462                              <1> 	; current character height (=16)
  2463                              <1> 	; (Note: Default/initial values are 6 and 7.
  2464                              <1> 	; If set values are 6 (start) & 7 (stop) and 
  2465                              <1> 	; [CHAR_HEIGHT] = 16 :
  2466                              <1> 	; After fixing, start line will be 14, stop line
  2467                              <1> 	; will be 15.)
  2468                              <1> 
  2469                              <1> 	;mov	ax, cx
  2470                              <1> 	; 02/08/2022
  2471 00001EA2 89C8                <1> 	mov	eax, ecx
  2472                              <1> 
  2473 00001EA4 86C4                <1> 	xchg	al, ah
  2474                              <1> 	; AL = start line, AH = stop line
  2475 00001EA6 E893FFFFFF          <1> 	call	cursor_shape_fix
  2476                              <1> 	; AL = start line (fixed), AH = stop line (fixed)
  2477                              <1> 	;mov	cx, ax
  2478                              <1> 	; 02/08/2022
  2479 00001EAB 89C1                <1> 	mov	ecx, eax
  2480 00001EAD 86E9                <1> 	xchg	ch, cl
  2481                              <1> 	; CH = start line (fixed), CL = stop line (fixed)
  2482                              <1> 	;
  2483 00001EAF B40A                <1> 	mov	ah, 10	; 6845 register for cursor set
  2484 00001EB1 66890D[37670000]    <1> 	mov	[CURSOR_MODE], cx ; save in data area
  2485                              <1> 	;call	m16	; output cx register
  2486                              <1> 	;retn
  2487 00001EB8 E977040000          <1>         jmp     m16
  2488                              <1> 
  2489                              <1> SET_CPOS:
  2490                              <1> 	; 02/08/2022 (TRDOS 386 Kernel v2.0.5)
  2491                              <1> 	; 12/09/2016
  2492                              <1> 	; 07/07/2016
  2493                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  2494 00001EBD 80FF07              <1> 	cmp	bh, 7 ; video page > 7 ; 07/07/2016
  2495                              <1> 	;ja	VIDEO_RETURN
  2496                              <1> 	; 02/08/2022
  2497 00001EC0 770E                <1> 	ja	short set_cpos_inv_vp
  2498                              <1> 	;
  2499 00001EC2 803D[1E670000]07    <1> 	cmp	byte [CRT_MODE], 7
  2500 00001EC9 770A                <1> 	ja	short vga_set_cpos ; 12/09/2016	
  2501 00001ECB E839040000          <1> 	call	_set_cpos
  2502                              <1> set_cpos_inv_vp:   ; 02/08/2022
  2503 00001ED0 E939FCFFFF          <1>         jmp     VIDEO_RETURN
  2504                              <1> 
  2505                              <1> vga_set_cpos:
  2506                              <1> 	; 12/09/2016
  2507                              <1> 	; 09/07/2016
  2508                              <1> 	; set cursor position
  2509                              <1> 	; NOTE: Hardware cursor position will not be set
  2510                              <1> 	;   in any VGA modes (>7)
  2511                              <1> 	;   But, cursor position will be saved into
  2512                              <1> 	;   [CURSOR_POSN].
  2513                              <1> 	;   TRDOS 386 (TRDOS v2.0) uses only one page
  2514                              <1> 	;   (page 0) for all graphics modes.
  2515                              <1> 
  2516 00001ED5 668915[66770100]    <1> 	mov	[CURSOR_POSN], dx ; save cursor pos for pg 0
  2517                              <1> 	; 04/08/2016
  2518                              <1> 	;mov	bh, [ACTIVE_PAGE] ; = 0
  2519                              <1> 	;call	_set_cpos
  2520 00001EDC E92DFCFFFF          <1> 	jmp     VIDEO_RETURN
  2521                              <1> 
  2522                              <1> READ_CURSOR:
  2523                              <1> 	; 12/09/2016
  2524                              <1> 	; 07/07/2016
  2525                              <1> 	; 12/05/2016
  2526                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  2527                              <1> 	;
  2528                              <1> 	; VIDEO.ASM - 06/10/85  VIDEO DISPLAY BIOS
  2529                              <1> 
  2530                              <1> ;------------------------------------------------------
  2531                              <1> ; READ_CURSOR
  2532                              <1> ;	THIS ROUTINE READS THE CURRENT CURSOR VALUE FROM THE
  2533                              <1> ;	845, FORMATS IT, AND SENDS IT BACK TO THE CALLER
  2534                              <1> ; INPUT
  2535                              <1> ;	BH - PAGE OF CURSOR
  2536                              <1> ; OUTPUT
  2537                              <1> ;	DX - ROW, COLUMN OF THE CURRENT CURSOR POSITION
  2538                              <1> ;	CX - CURRENT CURSOR MODE
  2539                              <1> ;------------------------------------------------------
  2540                              <1> 
  2541                              <1> 	; BH = Video page number (0 to 7)
  2542                              <1> 
  2543                              <1> 	; 07/07/2016
  2544 00001EE1 80FF07              <1> 	cmp	bh, 7 ; video page > 7 (invalid)
  2545 00001EE4 7606                <1> 	jna	short read_cursor_1
  2546                              <1> 	; invalid video page (input) 
  2547 00001EE6 31C9                <1> 	xor	ecx, ecx ; 0
  2548 00001EE8 31D2                <1> 	xor	edx, edx ; 0
  2549 00001EEA EB15                <1> 	jmp	short read_cursor_2
  2550                              <1> read_cursor_1:
  2551                              <1> 	; 12/09/2016
  2552 00001EEC 803D[1E670000]07    <1> 	cmp	byte [CRT_MODE], 7 ; vga mode
  2553 00001EF3 7727                <1> 	ja	short vga_get_cpos
  2554                              <1> 	;
  2555 00001EF5 E815000000          <1> 	call	get_cpos
  2556 00001EFA 0FB70D[37670000]    <1> 	movzx	ecx, word [CURSOR_MODE]
  2557                              <1> read_cursor_2:
  2558 00001F01 5D                  <1> 	pop	ebp
  2559 00001F02 5F                  <1> 	pop	edi
  2560 00001F03 5E                  <1> 	pop	esi
  2561 00001F04 5B                  <1> 	pop	ebx
  2562 00001F05 58                  <1> 	pop	eax  ; DISCARD SAVED CX AND DX
  2563 00001F06 58                  <1> 	pop	eax
  2564 00001F07 A1[CC830100]        <1> 	mov	eax, [video_eax] ; 12/05/2016
  2565                              <1> 	;;15/01/2017
  2566                              <1> 	;;mov	byte [intflg], 0 ; 07/01/2017
  2567 00001F0C 1F                  <1> 	pop	ds
  2568 00001F0D 07                  <1> 	pop	es
  2569 00001F0E CF                  <1> 	iretd
  2570                              <1> 
  2571                              <1> get_cpos:
  2572                              <1> 	; 12/05/2016
  2573                              <1> 	; 16/01/2016
  2574                              <1> 	; BH = Video page number (0 to 7)
  2575                              <1> 	;
  2576 00001F0F D0E7                <1> 	shl	bh, 1 ; WORD OFFSET
  2577 00001F11 0FB6F7              <1> 	movzx	esi, bh 
  2578 00001F14 0FB796[66770100]    <1> 	movzx	edx, word [esi+CURSOR_POSN]
  2579 00001F1B C3                  <1> 	retn
  2580                              <1> 
  2581                              <1> vga_get_cpos:
  2582                              <1> 	; 12/09/2016
  2583                              <1> 	; get cursor position (vga)
  2584 00001F1C 0FB715[66770100]    <1> 	movzx	edx, word [CURSOR_POSN] ; cursor pos for pg 0
  2585 00001F23 31C9                <1> 	xor	ecx, ecx ; Cursor Mode = 0 (invalid)
  2586 00001F25 EBDA                <1> 	jmp     short read_cursor_2
  2587                              <1> 
  2588                              <1> ACT_DISP_PAGE:
  2589                              <1> 	; 07/07/2016
  2590                              <1> 	; 26/06/2016
  2591                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  2592                              <1> 	;
  2593                              <1> 	; VIDEO.ASM - 06/10/85  VIDEO DISPLAY BIOS
  2594                              <1> 	;
  2595                              <1> ;-----------------------------------------------------
  2596                              <1> ; ACT_DISP_PAGE
  2597                              <1> ;	THIS ROUTINE SETS THE ACTIVE DISPLAY PAGE, ALLOWING
  2598                              <1> ;	THE FULL USE OF THE MEMORY SET ASIDE FOR THE VIDEO ATTACHMENT
  2599                              <1> ; INPUT
  2600                              <1> ;	AL HAS THE NEW ACTIVE DISPLAY PAGE
  2601                              <1> ; OUTPUT
  2602                              <1> ;	THE 6845 IS RESET TO DISPLAY THAT PAGE
  2603                              <1> ;-----------------------------------------------------
  2604                              <1> 	; 07/07/2016
  2605 00001F27 3C07                <1> 	cmp	al, 7	; > 7 = invalid video page number
  2606                              <1> 	;ja	VIDEO_RETURN
  2607 00001F29 7715                <1>         ja	short adp_2 ; 18/11/2020
  2608                              <1> 	;cmp	byte [CRT_MODE], 3
  2609                              <1> 	;je	short adp_1
  2610                              <1> 	; 18/11/2020
  2611 00001F2B 8A25[1E670000]      <1> 	mov	ah, [CRT_MODE]
  2612 00001F31 80FC03              <1> 	cmp	ah, 3
  2613 00001F34 7605                <1> 	jna	short adp_1 ; mode 01h, 00h (01h), 02h (03h), 03h
  2614 00001F36 80FC07              <1> 	cmp	ah, 7	    ; mode 07h (03h)
  2615 00001F39 7505                <1> 	jne	short adp_2
  2616                              <1> 	;and 	al, al
  2617                              <1>         ;jnz	VIDEO_RETURN
  2618                              <1> 	;;sub	al, al ; 0 ; force to page 0
  2619                              <1> adp_1:	
  2620 00001F3B E805000000          <1> 	call	set_active_page
  2621                              <1> adp_2:
  2622 00001F40 E9C9FBFFFF          <1>         jmp     VIDEO_RETURN
  2623                              <1> 
  2624                              <1> set_active_page:   ; tty_sw
  2625                              <1> 	; 02/08/2022 (TRDOS 386 Kernel v2.0.5)
  2626                              <1> 	; 09/12/2017
  2627                              <1> 	; 26/07/2016
  2628                              <1> 	; 26/06/2016
  2629                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  2630                              <1> 	; 30/06/2015
  2631                              <1> 	; 04/03/2014  (act_disp_page --> tty_sw)
  2632                              <1> 	; 10/12/2013
  2633                              <1> 	; 04/12/2013
  2634                              <1> 	;
  2635 00001F45 A2[76770100]        <1> 	mov	[ACTIVE_PAGE], al ; save active page value ; [ptty]
  2636                              <1> _set_active_page:
  2637                              <1> 	; 27/06/2015
  2638                              <1> 	;movzx	ebx, al
  2639                              <1> 	; 02/08/2022
  2640 00001F4A 0FB6C0              <1> 	movzx	eax, al
  2641 00001F4D 89C3                <1> 	mov	ebx, eax
  2642                              <1> 	;
  2643                              <1> 	;cbw	; 07/09/2014 (ah=0)
  2644                              <1> 	; 02/08/2022
  2645                              <1> 	;sub	ah, ah ; 09/12/2017
  2646 00001F4F 66F725[DC830100]    <1> 	mul	word [CRT_LEN]  ; get saved length of regen buffer
  2647                              <1> 				; display page times regen length
  2648                              <1> 	; 10/12/2013
  2649 00001F56 66A3[64770100]      <1> 	mov	[CRT_START], ax ; save start address for later
  2650                              <1> 	;mov	cx, ax ; start address to cx
  2651                              <1> 	; 02/08/2022
  2652 00001F5C 89C1                <1> 	mov	ecx, eax
  2653                              <1> _M16:
  2654                              <1> 	;;sar	cx, 1
  2655                              <1> 	;shr	cx, 1	; divide by 2 for 6845 handling
  2656                              <1> 	; 02/08/2022
  2657 00001F5E D1E9                <1> 	shr	ecx, 1
  2658 00001F60 B40C                <1> 	mov	ah, 12	; 6845 register for start address
  2659 00001F62 E8CD030000          <1> 	call	m16
  2660                              <1> 	;sal	bx, 1
  2661                              <1> 	; 01/09/2014
  2662 00001F67 D0E3                <1> 	shl	bl, 1	; *2 for word offset
  2663 00001F69 81C3[66770100]      <1> 	add	ebx, CURSOR_POSN
  2664 00001F6F 668B13              <1> 	mov	dx, [ebx] ; get cursor for this page
  2665                              <1> 	; 16/01/2016
  2666                              <1> 	;call	m18
  2667                              <1> 	;retn
  2668 00001F72 E9A9030000          <1> 	jmp	m18
  2669                              <1> 
  2670                              <1> position:
  2671                              <1> 	; 02/08/2022 - TRDOS 386 v2.0.5
  2672                              <1> 	; 17/04/2021 - TRDOS 386 v2.0.4
  2673                              <1> 	; 24/06/2016
  2674                              <1> 	; 12/05/2016 - TRDOS 386 (TRDOS v2.0)
  2675                              <1> 	; 27/06/2015
  2676                              <1> 	; 02/09/2014
  2677                              <1> 	; 30/08/2014 (Retro UNIX 386 v1)
  2678                              <1> 	; 04/12/2013 (Retro UNIX 8086 v1)
  2679                              <1> 	;
  2680                              <1> 	; VIDEO.ASM - 06/10/85  VIDEO DISPLAY BIOS
  2681                              <1> 	;
  2682                              <1> ;-----------------------------------------
  2683                              <1> ; POSITION
  2684                              <1> ;	THIS SERVICE ROUTINE CALCULATES THE REGEN BUFFER ADDRESS
  2685                              <1> ;	OF A CHARACTER IN THE ALPHA MODE
  2686                              <1> ; INPUT
  2687                              <1> ;	AX = ROW, COLUMN POSITION
  2688                              <1> ; OUTPUT
  2689                              <1> ;	AX = OFFSET OF CHAR POSITION IN REGEN BUFFER
  2690                              <1> ;-----------------------------------------
  2691                              <1> 
  2692                              <1> 	; DX = ROW, COLUMN POSITION
  2693                              <1> 	;movzx	eax, byte [CRT_COLS] ; 27/06/2015
  2694 00001F77 31C0                <1> 	xor	eax, eax ; 02/09/2014
  2695 00001F79 B050                <1> 	mov	al, 80   ; determine bytes to row	
  2696 00001F7B F6E6                <1> 	mul	dh	 ; row value
  2697                              <1> 	;xor	dh, dh   ; 0	
  2698                              <1> 	;add	ax, dx	 ; add column value to the result
  2699                              <1> 	; 16/04/2021
  2700 00001F7D 00D0                <1> 	add	al, dl
  2701 00001F7F 80D400              <1> 	adc	ah, 0
  2702                              <1> 	; 02/08/2022
  2703 00001F82 D1E0                <1> 	shl	eax, 1
  2704                              <1> 	;shl	ax, 1	; * 2 for attribute bytes
  2705                              <1> 		; EAX = AX = OFFSET OF CHAR POSITION IN REGEN BUFFER 
  2706 00001F84 C3                  <1> 	retn
  2707                              <1> 
  2708                              <1> find_position:
  2709                              <1> 	; 17/04/2021 - TRDOS 386 v2.0.4
  2710                              <1> 	; 24/06/2016
  2711                              <1> 	; 12/05/2016 - TRDOS 386 (TRDOS v2.0)
  2712                              <1> 	; 27/06/2015
  2713                              <1> 	; 07/09/2014
  2714                              <1> 	; 02/09/2014
  2715                              <1> 	; 30/08/2014 (Retro UNIX 386 v1)
  2716                              <1> 	; VIDEO.ASM - 06/10/85  VIDEO DISPLAY BIOS
  2717                              <1> 
  2718 00001F85 0FB6CF              <1> 	movzx	ecx, bh ; video page number
  2719                              <1> 	; 17/04/2021
  2720                              <1> 	;mov	esi, ecx
  2721                              <1> 	;shl	si, 1
  2722                              <1> 	;mov	dx, [esi+CURSOR_POSN]
  2723                              <1> 	;jz	short p21
  2724                              <1> 	;xor	si, si
  2725                              <1> 	; 17/04/2021
  2726 00001F88 31F6                <1> 	xor	esi, esi
  2727 00001F8A D0E1                <1> 	shl	cl, 1
  2728 00001F8C 668B91[66770100]    <1> 	mov	dx, [ecx+CURSOR_POSN]
  2729 00001F93 740B                <1> 	jz	short p21
  2730 00001F95 D0E9                <1> 	shr	cl, 1
  2731                              <1> p20:
  2732 00001F97 660335[DC830100]    <1> 	add	si, [CRT_LEN] ; 24/06/2016
  2733                              <1> 	;add	si, 80*25*2 ; add length of buffer for one page
  2734 00001F9E E2F7                <1> 	loop	p20
  2735                              <1> p21:
  2736 00001FA0 6621D2              <1> 	and	dx, dx
  2737 00001FA3 7407                <1> 	jz	short p22
  2738 00001FA5 E8CDFFFFFF          <1> 	call 	position ; determine location in regen in page
  2739 00001FAA 01C6                <1> 	add	esi, eax ; add location to start of regen page
  2740                              <1> p22:	
  2741                              <1> 	;mov	dx, [addr_6845] ; get base address of active display
  2742                              <1> 	;mov	dx, 03D4h ; I/O address of color card
  2743                              <1> 	;add	dx, 6	; point at status port
  2744 00001FAC 66BADA03            <1> 	mov	dx, 03DAh ; status port
  2745                              <1> 	; cx = 0
  2746 00001FB0 C3                  <1> 	retn
  2747                              <1> 
  2748                              <1> SCROLL_UP:
  2749                              <1> 	; 04/08/2022 (TRDOS 386 v2.0.5)
  2750                              <1> 	; 07/07/2016
  2751                              <1> 	; 26/06/2016
  2752                              <1> 	; 12/05/2016
  2753                              <1> 	; 30/01/2016
  2754                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  2755                              <1> 	; 07/09/2014
  2756                              <1> 	; 02/09/2014
  2757                              <1> 	; 01/09/2014 (Retro UNIX 386 v1 - beginning)
  2758                              <1> 	; 04/04/2014
  2759                              <1> 	; 04/12/2013
  2760                              <1> 	;
  2761                              <1> 	; VIDEO.ASM - 06/10/85  VIDEO DISPLAY BIOS
  2762                              <1> 	;
  2763                              <1> ;----------------------------------------------
  2764                              <1> ; SCROLL UP
  2765                              <1> ;	THIS ROUTINE MOVES A BLOCK OF CHARACTERS UP
  2766                              <1> ;	ON THE SCREEN
  2767                              <1> ; INPUT
  2768                              <1> ;	(AH) = CURRENT CRT MODE
  2769                              <1> ;	(AL) = NUMBER OF ROWS TO SCROLL
  2770                              <1> ;	(CX) = ROW/COLUMN OF UPPER LEFT CORNER
  2771                              <1> ;	(DX) = ROW/COLUMN OF LOWER RIGHT CORNER
  2772                              <1> ;	(BH) = ATTRIBUTE TO BE USED ON BLANKED LINE
  2773                              <1> ;	(DS) = DATA SEGMENT
  2774                              <1> ;	(ES) = REGEN BUFFER SEGMENT
  2775                              <1> ; OUTPUT
  2776                              <1> ;	NONE -- THE REGEN BUFFER IS MODIFIED
  2777                              <1> ;--------------------------------------------
  2778                              <1> 
  2779                              <1> 	; 07/07/2016
  2780 00001FB1 38F5                <1> 	cmp	ch, dh
  2781                              <1> 	;ja	VIDEO_RETURN
  2782                              <1> 	; 04/08/2022
  2783 00001FB3 7709                <1> 	ja	short _s_u_retn
  2784                              <1> 
  2785 00001FB5 38D1                <1> 	cmp	cl, dl
  2786                              <1> 	;ja	VIDEO_RETURN
  2787                              <1> 	; 04/08/2022
  2788 00001FB7 7705                <1> 	ja	short _s_u_retn
  2789                              <1> 	;
  2790 00001FB9 E805000000          <1> 	call	_scroll_up
  2791                              <1> _s_u_retn:
  2792 00001FBE E94BFBFFFF          <1>         jmp     VIDEO_RETURN
  2793                              <1> 
  2794                              <1> _scroll_up:  ; from 'write_tty'
  2795                              <1> 	;
  2796                              <1> 	; cl = left upper column
  2797                              <1> 	; ch = left upper row
  2798                              <1> 	; dl = right lower column
  2799                              <1> 	; dh = right lower row
  2800                              <1> 	;
  2801                              <1> 	; al = line count 
  2802                              <1> 	; bl = attribute to be used on blanked line
  2803                              <1> 	; bh = video page number (0 to 7)
  2804                              <1> 
  2805 00001FC3 E89B000000          <1> 	call	test_line_count ; 16/01/2016
  2806                              <1> 
  2807 00001FC8 8A25[1E670000]      <1> 	mov	ah, [CRT_MODE] ; current video mode
  2808                              <1> 	;;cmp	byte [CRT_MODE], 4
  2809                              <1> 	;cmp	ah, 4 ; 07/07/2016
  2810                              <1> 	;jnb	GRAPHICS_UP ; 26/06/2016
  2811                              <1> 	; 18/11/2020
  2812 00001FCE 80FC04              <1> 	cmp	ah, 4
  2813 00001FD1 720A                <1>  	jb	short n0	
  2814 00001FD3 80FC07              <1> 	cmp	ah, 7 ; TEST FOR BW CARD 
  2815                              <1> 		      ;	(80x25 text, mono)
  2816 00001FD6 7405                <1> 	je	short n0 ; same with mode 3 for TRDOS 386
  2817 00001FD8 E91B050000          <1> 	jmp	GRAPHICS_UP
  2818                              <1> n0:
  2819                              <1> 	; 07/07/2016
  2820 00001FDD 80FF07              <1> 	cmp	bh, 7 ; video page number
  2821 00001FE0 7606                <1> 	jna	short n1
  2822 00001FE2 8A3D[76770100]      <1> 	mov	bh, [ACTIVE_PAGE]
  2823                              <1> n1:
  2824 00001FE8 88DC                <1> 	mov	ah, bl ; attribute
  2825                              <1> 	;push	ax ; *
  2826                              <1> 	; 12/04/2021
  2827 00001FEA 50                  <1> 	push	eax ; *
  2828                              <1> 	;mov 	esi, [CRT_BASE]
  2829 00001FEB BE00800B00          <1>         mov     esi, 0B8000h  
  2830 00001FF0 3A3D[76770100]      <1>         cmp     bh, [ACTIVE_PAGE]
  2831 00001FF6 750B                <1> 	jne	short n2
  2832                              <1> 	;
  2833 00001FF8 66A1[64770100]      <1>         mov     ax, [CRT_START]
  2834 00001FFE 6601C6              <1>         add     si, ax
  2835 00002001 EB11                <1>         jmp     short n4
  2836                              <1> n2:
  2837 00002003 20FF                <1>         and     bh, bh
  2838 00002005 740D                <1> 	jz	short n4
  2839 00002007 88F8                <1> 	mov	al, bh
  2840                              <1> n3:
  2841 00002009 660335[DC830100]    <1>         add	si, [CRT_LEN]
  2842 00002010 FEC8                <1>         dec	al
  2843 00002012 75F5                <1> 	jnz	short n3
  2844                              <1> n4:	
  2845 00002014 E85B000000          <1> 	call	scroll_position ; 16/01/2016
  2846 00002019 7420                <1>         jz      short n6 
  2847                              <1> 
  2848 0000201B 01CE                <1>         add     esi, ecx ; from address for scroll
  2849 0000201D 88F5                <1> 	mov	ch, dh  ; #rows in block
  2850 0000201F 28C5                <1> 	sub	ch, al	; #rows to be moved
  2851                              <1> n5:
  2852 00002021 E88A000000          <1> 	call	n10 ; 16/01/2016
  2853                              <1> 	
  2854 00002026 51                  <1>         push	ecx
  2855 00002027 0FB60D[20670000]    <1> 	movzx	ecx, byte [CRT_COLS] 
  2856 0000202E 00C9                <1> 	add	cl, cl
  2857 00002030 01CE                <1>         add	esi, ecx  ; next line
  2858 00002032 01CF                <1>         add	edi, ecx
  2859 00002034 59                  <1> 	pop	ecx
  2860                              <1> 
  2861 00002035 FECD                <1> 	dec	ch	 ; count of lines to move
  2862 00002037 75E8                <1> 	jnz	short n5 ; row loop
  2863                              <1> 	; ch = 0
  2864 00002039 88C6                <1> 	mov	dh, al	 ; #rows
  2865                              <1> n6:
  2866                              <1> 	; attribute in ah
  2867 0000203B B020                <1> 	mov	al, ' '	 ; fill with blanks
  2868                              <1> n7:
  2869 0000203D E87B000000          <1> 	call	n11 ; 16/01/2016
  2870                              <1> 
  2871 00002042 8A0D[20670000]      <1> 	mov	cl, [CRT_COLS]
  2872 00002048 00C9                <1> 	add	cl, cl
  2873 0000204A 01CF                <1>         add	edi, ecx
  2874                              <1> 
  2875 0000204C FECE                <1> 	dec	dh
  2876 0000204E 75ED                <1> 	jnz	short n7
  2877                              <1> n16:
  2878 00002050 3A3D[76770100]      <1> 	cmp	bh, [ACTIVE_PAGE]
  2879 00002056 750A                <1> 	jne	short n8
  2880                              <1> 	
  2881                              <1> 	;cmp	byte [CRT_MODE], 7 ; is this the black and white card
  2882                              <1> 	;je	short n8	   ; if so, skip the mode reset
  2883                              <1> 
  2884 00002058 A0[1F670000]        <1> 	mov	al, [CRT_MODE_SET] ; get the value of mode set
  2885 0000205D 66BAD803            <1> 	mov	dx, 03D8h ; always set color card port
  2886 00002061 EE                  <1> 	out	dx, al
  2887                              <1> n8:
  2888 00002062 C3                  <1> 	retn
  2889                              <1> 
  2890                              <1> test_line_count:
  2891                              <1> 	; 12/04/2021
  2892                              <1> 	; 12/05/2016
  2893                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  2894                              <1> 	; 07/09/2014 (scroll_up)
  2895 00002063 08C0                <1> 	or	al, al
  2896 00002065 740C                <1> 	jz	short al_set2
  2897                              <1> 	;push	dx
  2898                              <1> 	; 12/04/2021
  2899 00002067 52                  <1> 	push	edx
  2900 00002068 28EE                <1> 	sub	dh, ch  ; subtract upper row from lower row number
  2901 0000206A FEC6                <1> 	inc	dh	; adjust difference by 1
  2902 0000206C 38C6                <1> 	cmp	dh, al 	; line count = amount of rows in window?
  2903 0000206E 7502                <1> 	jne	short al_set1 ; if not the we're all set
  2904 00002070 30C0                <1> 	xor	al, al	; otherwise set al to zero
  2905                              <1> al_set1:
  2906                              <1> 	;pop	dx
  2907                              <1> 	; 12/04/2021
  2908 00002072 5A                  <1> 	pop	edx
  2909                              <1> al_set2:
  2910 00002073 C3                  <1> 	retn
  2911                              <1> 
  2912                              <1> scroll_position:
  2913                              <1> 	; 12/04/2021
  2914                              <1> 	; 26/06/2016
  2915                              <1> 	; 30/01/2016
  2916                              <1>         ; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  2917                              <1> 	; 07/09/2014 (scroll_up)
  2918                              <1> 
  2919                              <1> 	; (*) [esp+4] = ax (al = line count, ah = attribute)
  2920                              <1> 
  2921                              <1> 	;push	dx
  2922                              <1> 	; 12/04/2021
  2923 00002074 52                  <1> 	push	edx
  2924 00002075 6689CA              <1> 	mov	dx, cx	; now, upper left position in DX
  2925 00002078 E8FAFEFFFF          <1> 	call	position
  2926 0000207D 01C6                <1> 	add	esi, eax
  2927 0000207F 89F7                <1> 	mov	edi, esi
  2928                              <1> 	;pop	dx	; lower right position in DX
  2929                              <1> 	; 12/04/2021
  2930 00002081 5A                  <1> 	pop	edx
  2931 00002082 6629CA              <1> 	sub	dx, cx
  2932 00002085 FEC6                <1> 	inc	dh	; dh = #rows 
  2933 00002087 FEC2                <1> 	inc	dl	; dl = #cols in block
  2934 00002089 59                  <1> 	pop	ecx 	; return address
  2935                              <1> 	;pop	ax	; * ; al = line count, ah = attribute
  2936                              <1> 	; 12/04/2021
  2937 0000208A 58                  <1> 	pop	eax ; (*)
  2938 0000208B 51                  <1> 	push	ecx	; return address
  2939 0000208C 0FB7C8              <1> 	movzx	ecx, ax
  2940 0000208F 8A25[20670000]      <1> 	mov	ah, [CRT_COLS]
  2941 00002095 F6E4                <1> 	mul	ah	; determine offset to from address
  2942                              <1> 	;add	ax, ax  ; *2 for attribute byte
  2943                              <1> 	; 02/08/2022
  2944                              <1> 	;shl	eax, 1
  2945 00002097 01C0                <1> 	add	eax, eax
  2946                              <1> 	;
  2947                              <1> 	;push	ax	; offset 
  2948                              <1> 	;push	dx
  2949                              <1> 	; 12/04/2021
  2950 00002099 50                  <1> 	push	eax	; offset 
  2951 0000209A 52                  <1> 	push	edx
  2952                              <1> 	;
  2953                              <1> 	; 04/04/2014
  2954 0000209B 66BADA03            <1> 	mov	dx, 3DAh ; guaranteed to be color card here	
  2955                              <1> n9:                      ; wait_display_enable
  2956 0000209F EC                  <1>         in      al, dx   ; get port
  2957 000020A0 A808                <1> 	test	al, RVRT ; wait for vertical retrace	
  2958 000020A2 74FB                <1> 	jz	short n9 ; wait_display_enable
  2959 000020A4 B025                <1> 	mov	al, 25h
  2960 000020A6 B2D8                <1> 	mov	dl, 0D8h ; address control port
  2961 000020A8 EE                  <1> 	out	dx, al	; turn off video during vertical retrace
  2962                              <1> 	;pop	dx	; #rows, #cols
  2963                              <1>        	;pop	ax	; offset
  2964                              <1> 	; 12/04/2021
  2965 000020A9 5A                  <1> 	pop	edx	; #rows, #cols
  2966 000020AA 58                  <1>        	pop	eax	; offset
  2967 000020AB 6691                <1> 	xchg	ax, cx	; 
  2968                              <1> 	; ecx = offset, al = line count, ah = attribute
  2969                              <1> 	;
  2970 000020AD 08C0                <1> 	or	al, al
  2971 000020AF C3                  <1> 	retn
  2972                              <1> n10:
  2973                              <1> 	; Move rows
  2974 000020B0 88D1                <1> 	mov	cl, dl	; get # of cols to move
  2975 000020B2 56                  <1> 	push	esi
  2976 000020B3 57                  <1> 	push	edi	; save start address
  2977                              <1> n10r:
  2978 000020B4 66A5                <1> 	movsw		; move that line on screen
  2979 000020B6 FEC9                <1> 	dec	cl
  2980 000020B8 75FA                <1>         jnz     short n10r
  2981 000020BA 5F                  <1> 	pop	edi
  2982 000020BB 5E                  <1> 	pop	esi	; recover addresses
  2983 000020BC C3                  <1> 	retn
  2984                              <1> n11:
  2985                              <1> 	; Clear rows
  2986                              <1>                 	; dh =  #rows
  2987 000020BD 88D1                <1>         mov	cl, dl	; get # of cols to clear
  2988 000020BF 57                  <1>         push    edi     ; save address
  2989                              <1> n11r:
  2990 000020C0 66AB                <1>         stosw           ; store fill character
  2991 000020C2 FEC9                <1> 	dec	cl
  2992 000020C4 75FA                <1>         jnz     short n11r
  2993 000020C6 5F                  <1>         pop     edi     ; recover address
  2994 000020C7 C3                  <1> 	retn
  2995                              <1> 
  2996                              <1> SCROLL_DOWN:
  2997                              <1> 	; 12/04/2021
  2998                              <1> 	; 07/07/2016
  2999                              <1> 	; 27/06/2016
  3000                              <1> 	; 26/06/2016
  3001                              <1> 	; 12/05/2016
  3002                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  3003                              <1> 	;
  3004                              <1> 	; VIDEO.ASM - 06/10/85  VIDEO DISPLAY BIOS
  3005                              <1> 
  3006                              <1> ;------------------------------------------
  3007                              <1> ; SCROLL DOWN
  3008                              <1> ;	THIS ROUTINE MOVES THE CHARACTERS WITHIN A DEFINED
  3009                              <1> ;	BLOCK DOWN ON THE SCREEN, FILLING THE TOP LINES
  3010                              <1> ;	WITH A DEFINED CHARACTER
  3011                              <1> ; INPUT
  3012                              <1> ;	(AH) = CURRENT CRT MODE
  3013                              <1> ;	(AL) = NUMBER OF LINES TO SCROLL
  3014                              <1> ;	(CX) = UPPER LEFT CORNER OF RECION
  3015                              <1> ;	(DX) = LOWER RIGHT CORNER OF REGION
  3016                              <1> ;	(BH) = FILL CHARACTER
  3017                              <1> ;	(DS) = DATA SEGMENT
  3018                              <1> ;	(ES) = REGEN SEGMENT
  3019                              <1> ; OUTPUT
  3020                              <1> ;	NONE -- SCREEN IS SCROLLED
  3021                              <1> ;------------------------------------------
  3022                              <1> 
  3023                              <1> 	; 07/07/2016
  3024 000020C8 38F5                <1> 	cmp	ch, dh
  3025                              <1> 	;ja	VIDEO_RETURN
  3026 000020CA 7709                <1> 	ja	short _s_d_retn ; 18/11/2020
  3027 000020CC 38D1                <1> 	cmp	cl, dl
  3028                              <1> 	;ja	VIDEO_RETURN
  3029 000020CE 7705                <1> 	ja	short _s_d_retn ; 18/11/2020
  3030                              <1> 	;
  3031 000020D0 E805000000          <1> 	call	_scroll_down
  3032                              <1> _s_d_retn:
  3033 000020D5 E934FAFFFF          <1>         jmp     VIDEO_RETURN
  3034                              <1> 
  3035                              <1> _scroll_down: ; 27/06/2016
  3036                              <1> 
  3037                              <1> 	; cl = left upper column
  3038                              <1> 	; ch = left upper row
  3039                              <1> 	; dl = right lower column
  3040                              <1> 	; dh = right lower row
  3041                              <1> 	;
  3042                              <1> 	; al = line count 
  3043                              <1> 	; bl = attribute to be used on blanked line
  3044                              <1> 	; bh = video page number (0 to 7)
  3045                              <1> 
  3046                              <1> 	; !!!!
  3047 000020DA FD                  <1> 	std		; DIRECTION FOR SCROLL DOWN
  3048                              <1> 	; !!!!
  3049 000020DB E883FFFFFF          <1> 	call	test_line_count ; 16/01/2016
  3050                              <1> 	
  3051 000020E0 8A25[1E670000]      <1> 	mov	ah, [CRT_MODE] ; current video mode
  3052                              <1> 	;;cmp	byte [CRT_MODE], 4
  3053                              <1> 	;cmp	ah, 4 ; 07/07/2016
  3054                              <1> 	;jnb	GRAPHICS_DOWN ; 26/06/2016
  3055                              <1> 	; 18/11/2020
  3056 000020E6 80FC04              <1> 	cmp	ah, 4
  3057 000020E9 720A                <1>  	jb	short _n0	
  3058 000020EB 80FC07              <1> 	cmp	ah, 7 ; TEST FOR BW CARD 
  3059                              <1> 		      ;	(80x25 text, mono)
  3060 000020EE 7405                <1> 	je	short _n0 ; same with mode 3 for TRDOS 386
  3061 000020F0 E9D5060000          <1> 	jmp	GRAPHICS_DOWN
  3062                              <1> _n0:
  3063                              <1> 	; 07/07/2016
  3064 000020F5 80FF07              <1> 	cmp	bh, 7 ; video page number
  3065 000020F8 7606                <1> 	jna	short n12
  3066 000020FA 8A3D[76770100]      <1> 	mov	bh, [ACTIVE_PAGE]
  3067                              <1> 	;
  3068                              <1> n12:			; CONTINUE_DOWN
  3069 00002100 88DC                <1> 	mov	ah, bl
  3070                              <1> 	;push	ax	; * ; save attribute in ah
  3071                              <1> 	; 12/04/2021
  3072 00002102 50                  <1> 	push	eax
  3073 00002103 6689D0              <1> 	mov	ax, dx	; LOWER RIGHT CORNER
  3074 00002106 E869FFFFFF          <1> 	call	scroll_position	; GET REGEN LOCATION
  3075 0000210B 741F                <1> 	jz	short n14
  3076 0000210D 29CE                <1> 	sub	esi, ecx  ; SI IS FROM ADDRESS
  3077 0000210F 88F5                <1> 	mov	ch, dh  ; #rows in block
  3078 00002111 28C5                <1> 	sub	ch, al	; #rows to be moved
  3079                              <1> n13:
  3080 00002113 E898FFFFFF          <1> 	call	n10	; MOVE ONE ROW
  3081                              <1> 
  3082 00002118 51                  <1> 	push	ecx
  3083 00002119 8A0D[20670000]      <1> 	mov	cl, [CRT_COLS] 
  3084 0000211F 00C9                <1> 	add	cl, cl
  3085 00002121 29CE                <1>         sub	esi, ecx  ; next line
  3086 00002123 29CF                <1>         sub	edi, ecx
  3087 00002125 59                  <1>         pop	ecx
  3088                              <1> 	
  3089 00002126 FECD                <1> 	dec	ch	 ; count of lines to move
  3090 00002128 75E9                <1> 	jnz	short n13 ; row loop
  3091                              <1> 	; ch = 0
  3092 0000212A 88C6                <1> 	mov	dh, al	 ; #rows
  3093                              <1> n14:
  3094                              <1> 	; attribute in ah
  3095 0000212C B020                <1> 	mov	al, ' '	 ; fill with blanks
  3096                              <1> n15:
  3097 0000212E E88AFFFFFF          <1> 	call	n11 ; 16/01/2016
  3098                              <1> 
  3099 00002133 8A0D[20670000]      <1> 	mov	cl, [CRT_COLS]
  3100 00002139 00C9                <1> 	add	cl, cl
  3101 0000213B 29CF                <1>         sub	edi, ecx
  3102                              <1>         
  3103 0000213D FECE                <1> 	dec	dh
  3104 0000213F 75ED                <1> 	jnz	short n15
  3105                              <1> 	;
  3106                              <1> 	; 18/11/2020
  3107 00002141 FC                  <1> 	cld	; clear direction flag	
  3108                              <1> 	;
  3109 00002142 E909FFFFFF          <1> 	jmp	n16 ; 27/06/2016
  3110                              <1> 
  3111                              <1> ;	cmp	bh, [ACTIVE_PAGE]
  3112                              <1> ;	jne	short n16
  3113                              <1> ;
  3114                              <1> ;	;cmp	byte [CRT_MODE], 7	; is this the black and white card
  3115                              <1> ;	;je	short n16		; if so, skip the mode reset
  3116                              <1> ;
  3117                              <1> ;	mov	al, [CRT_MODE_SET] ; get the value of mode set
  3118                              <1> ;	mov	dx, 03D8h ; always set color card port
  3119                              <1> ;	out	dx, al
  3120                              <1> ;n16:
  3121                              <1> ;	; !!!!
  3122                              <1> ;	cld		; Clear direction flag !
  3123                              <1> ;	; !!!!
  3124                              <1> ;	retn
  3125                              <1> 
  3126                              <1> READ_AC_CURRENT:
  3127                              <1> 	; 08/07/2016
  3128                              <1> 	; 26/06/2016
  3129                              <1> 	; 12/05/2016
  3130                              <1> 	; 18/01/2016
  3131                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  3132                              <1> 	;
  3133                              <1> 	; VIDEO.ASM - 06/10/85  VIDEO DISPLAY BIOS
  3134                              <1> 	;
  3135                              <1> 	; 08/07/2016
  3136 00002147 803D[1E670000]07    <1>         cmp     byte [CRT_MODE], 7 ; 6!?
  3137 0000214E 7607                <1> 	jna	short read_ac_c
  3138 00002150 31C0                <1> 	xor	eax, eax
  3139 00002152 E9BCF9FFFF          <1>         jmp     _video_return 
  3140                              <1> read_ac_c:
  3141 00002157 E805000000          <1> 	call	_read_ac_current
  3142                              <1> 	; 12/05/2016
  3143                              <1>         ;jmp     VIDEO_RETURN
  3144 0000215C E9B2F9FFFF          <1> 	jmp	_video_return
  3145                              <1> 
  3146                              <1> ;------------------------------------------------------------------------
  3147                              <1> ; READ_AC_CURRENT							:
  3148                              <1> ;	THIS ROUTINE READS THE ATTRIBUTE AND CHARACTER AT THE CURRENT	:
  3149                              <1> ;	CURSOR POSITION AND RETURNS THEM TO THE CALLER			:
  3150                              <1> ; INPUT									:
  3151                              <1> ;	(AH) = CURRENT CRT MODE						:
  3152                              <1> ;	(BH) = DISPLAY PAGE ( ALPHA MODES ONLY )			:
  3153                              <1> ;	(DS) = DATA SEGMENT						:
  3154                              <1> ;	(ES) = REGEN SEGMENT						:
  3155                              <1> ; OUTPUT								:
  3156                              <1> ;	(AL) = CHARACTER READ						:
  3157                              <1> ;	(AH) = ATTRIBUTE READ						:
  3158                              <1> ;------------------------------------------------------------------------
  3159                              <1> 
  3160                              <1> _read_ac_current:
  3161                              <1> 	; 26/06/2016
  3162                              <1> 	; 12/05/2016 
  3163                              <1> 	; 18/01/2016
  3164                              <1> 
  3165 00002161 8A25[1E670000]      <1> 	mov	ah, [CRT_MODE] ; current video mode	
  3166 00002167 80FC04              <1> 	cmp	ah, 4
  3167 0000216A 720A                <1>  	jb	short p10
  3168                              <1> 	; 18/11/2020
  3169                              <1> 	;cmp	byte [CRT_MODE], 4
  3170                              <1> 	;jnb	GRAPHICS_READ ; 26/06/2016
  3171                              <1> 
  3172 0000216C 80FC07              <1> 	cmp	ah, 7 ; TEST FOR BW CARD (80x25 monochrome text)
  3173 0000216F 7405                <1> 	je	short p10	 ; same with mode 3 in TRDOS 386
  3174 00002171 E9A0080000          <1> 	jmp	GRAPHICS_READ
  3175                              <1> p10:
  3176 00002176 E80AFEFFFF          <1> 	call	find_position	; GET REGEN LOCATION AND PORT ADDRESS
  3177                              <1> 	;
  3178                              <1> 	; esi = regen location
  3179                              <1> 	; dx = status port
  3180                              <1> 	;
  3181                              <1> 
  3182                              <1> 	; 18/11/2020
  3183                              <1> 	; convert display mode to a zero value 
  3184                              <1> 	; for 80 column color mode
  3185                              <1> 	;mov	ah, [CRT_MODE]	
  3186                              <1> 	;sub	ah, 2
  3187                              <1> 	;shr	ah, 1
  3188                              <1> 	;jnz	short p13
  3189                              <1> 
  3190                              <1> 	; 05/12/2020
  3191                              <1> 	; 18/11/2020 (TRDOS 386 v2.0.3)
  3192                              <1> 	;xor	bl, bl	; 0
  3193 0000217B 803D[1E670000]03    <1> 	cmp	byte [CRT_MODE], 03h ; 80x25 color text
  3194                              <1> 	;je	short p11    ; Note: Only mode 03h and mode 01h are
  3195                              <1> 	;inc	bl	; 1  ;       in use by TRDOS 386 as text modes	
  3196                              <1> 	;jmp	short p14    ;       (07h, 00h and 02h are redirected)		
  3197 00002182 7516                <1> 	jne	short p13
  3198                              <1> 
  3199                              <1> 	; 05/12/2020
  3200 00002184 3A3D[76770100]      <1> 	cmp     bh, [ACTIVE_PAGE]
  3201 0000218A 750E                <1> 	jne	short p13 
  3202                              <1> 
  3203                              <1> 	; WAIT FOR HORIZONTAL RETRACE OR VERTICAL RETRACE IF COLOR 80
  3204                              <1> p11:
  3205 0000218C FB                  <1> 	sti		; enable interrupts first
  3206                              <1> 	; 05/12/2020
  3207 0000218D 90                  <1> 	nop
  3208                              <1> 	; 18/11/2020
  3209                              <1> 	;or	bl, bl
  3210                              <1> 	;jnz	short p13 ; mode 01h (and mode 00h) - 40x25 color text
  3211 0000218E FA                  <1> 	cli 		; block interrupts for single loop
  3212 0000218F EC                  <1> 	in	al, dx	; get status from the adapter
  3213 00002190 A801                <1> 	test	al, RHRZ ; is horizontal retrace low
  3214 00002192 75F8                <1> 	jnz	short p11 ; wait until it is
  3215                              <1> p12:			;  wait for either retrace high
  3216 00002194 EC                  <1> 	in	al, dx ; get status again
  3217 00002195 A809                <1> 	test	al, RVRT+RHRZ ; is horizontal or vertical retrace high
  3218 00002197 74FB                <1> 	jz	short p12 ; wait until either retrace active
  3219                              <1> ;p14:
  3220 00002199 FB                  <1> 	sti
  3221                              <1> p13:
  3222 0000219A 81C600800B00        <1> 	add	esi, 0B8000h 
  3223 000021A0 668B06              <1> 	mov	ax, [esi]
  3224                              <1> 
  3225 000021A3 C3                  <1> 	retn	; 18/01/2016
  3226                              <1> 
  3227                              <1> WRITE_AC_CURRENT:
  3228                              <1> 	; 08/07/2016
  3229                              <1> 	; 26/06/2016
  3230                              <1> 	; 24/06/2016
  3231                              <1> 	; 12/05/2016
  3232                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  3233                              <1> 	;
  3234                              <1> 	; VIDEO.ASM - 06/10/85  VIDEO DISPLAY BIOS
  3235                              <1> 	;
  3236                              <1> ;----------------------------------------------------------------
  3237                              <1> ; WRITE_AC_CURRENT						:
  3238                              <1> ;	THTS ROUTINE WRITES THE ATTRIBUTE AND CHARACTER		:
  3239                              <1> ;	AT THE CURRENT CURSOR POSITION				:
  3240                              <1> ; INPUT								:
  3241                              <1> ;	(AH) = CURRENT CRT MODE					:
  3242                              <1> ;	(BH) = DISPLAY PAGE					:
  3243                              <1> ;	(CX) = COUNT OF CHARACTERS TO WRITE			:
  3244                              <1> ;	(AL) = CHAR TO WRITE					:
  3245                              <1> ;	(BL) = ATTRIBUTE OF CHAR TO WRITE			:
  3246                              <1> ;	(DS) = DATA SEGMENT					:
  3247                              <1> ;	(ES) = REGEN SEGMENT					:
  3248                              <1> ; OUTPUT							:
  3249                              <1> ;	DISPLAY REGEN BUFFER UPDATED				:
  3250                              <1> ;----------------------------------------------------------------
  3251                              <1> 
  3252                              <1> 	; 08/07/2016
  3253 000021A4 803D[1E670000]07    <1> 	cmp	byte [CRT_MODE], 7 ; 6!?
  3254 000021AB 760A                <1> 	jna	short write_ac_c
  3255                              <1> 
  3256 000021AD E8B60A0000          <1> 	call	vga_write_char_attr
  3257 000021B2 E957F9FFFF          <1> 	jmp     VIDEO_RETURN	
  3258                              <1> 
  3259                              <1> write_ac_c:
  3260 000021B7 E834000000          <1> 	call	_write_c_current
  3261                              <1> 
  3262 000021BC 0FB6F7              <1> 	movzx	esi, bh ; video page number (0 to 7)	
  3263 000021BF 889E[27670000]      <1> 	mov	[esi+chr_attrib], bl ; color/attribute
  3264                              <1> 
  3265 000021C5 E944F9FFFF          <1>         jmp     VIDEO_RETURN
  3266                              <1> 
  3267                              <1> WRITE_C_CURRENT:
  3268                              <1> 	; 08/07/2016
  3269                              <1> 	; 26/06/2016
  3270                              <1> 	; 12/05/2016
  3271                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  3272                              <1> 	;
  3273                              <1> 	; VIDEO.ASM - 06/10/85  VIDEO DISPLAY BIOS
  3274                              <1> 	;
  3275                              <1> ;----------------------------------------------------------------
  3276                              <1> ; WRITE_C_CURRENT						:
  3277                              <1> ;	THIS ROUTINE WRITES THE CHARACTER AT			:
  3278                              <1> ;	THE CURRENT CURSOR POSITION, ATTRIBUTE UNCHANGED	:
  3279                              <1> ; INPUT								:
  3280                              <1> ;	(AH) = CURRENT CRT MODE					:
  3281                              <1> ;	(BH) = DISPLAY PAGE					:
  3282                              <1> ;	(CX) = COUNT OF CHARACTERS TO WRITE			:
  3283                              <1> ;	(AL) = CHAR TO WRITE					:
  3284                              <1> ;	(DS) = DATA SEGMENT					:
  3285                              <1> ;	(ES) = REGEN SEGMENT					:
  3286                              <1> ; OUTPUT							:
  3287                              <1> ;	DISPLAY REGEN BUFFER UPDATED				:
  3288                              <1> ;----------------------------------------------------------------
  3289                              <1> 
  3290                              <1> 	; 08/07/2016
  3291 000021CA 803D[1E670000]07    <1> 	cmp	byte [CRT_MODE], 7 ; 6!?
  3292 000021D1 760A                <1> 	jna	short write_c_c
  3293                              <1> 
  3294 000021D3 E8900A0000          <1> 	call	vga_write_char_only
  3295 000021D8 E931F9FFFF          <1> 	jmp     VIDEO_RETURN	
  3296                              <1> 
  3297                              <1> write_c_c:
  3298                              <1> 	;and	bh, 7 ; video page number (<= 7)
  3299 000021DD 0FB6F7              <1> 	movzx	esi, bh	
  3300 000021E0 8A9E[27670000]      <1> 	mov	bl, [esi+chr_attrib]
  3301                              <1> 
  3302 000021E6 E805000000          <1> 	call	_write_c_current
  3303 000021EB E91EF9FFFF          <1>         jmp     VIDEO_RETURN
  3304                              <1> 
  3305                              <1> _write_c_current:  ; from 'write_tty'
  3306                              <1> 	; 12/04/2021
  3307                              <1> 	; 18/11/2020
  3308                              <1> 	; 26/06/2016
  3309                              <1> 	; 24/06/2016
  3310                              <1> 	; 12/05/2016
  3311                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  3312                              <1> 	; 30/08/2014 (Retro UNIX 386 v1)
  3313                              <1> 	; 18/01/2014
  3314                              <1> 	; 04/12/2013
  3315                              <1> 	;
  3316                              <1> 	; VIDEO.ASM - 06/10/85 VIDEO DISPLAY BIOS
  3317                              <1> 
  3318                              <1> 	; 18/11/2020
  3319 000021F0 8A25[1E670000]      <1> 	mov	ah, [CRT_MODE] ; current video mode	
  3320 000021F6 80FC04              <1> 	cmp	ah, 4
  3321 000021F9 720A                <1>  	jb	short p40
  3322                              <1> 	
  3323                              <1> 	;cmp	byte [CRT_MODE], 4
  3324                              <1>         ;jnb	GRAPHICS_WRITE ; 26/06/2016
  3325                              <1> 
  3326 000021FB 80FC07              <1> 	cmp	ah, 7 ; TEST FOR BW CARD
  3327 000021FE 7405                <1> 	je	short p40
  3328 00002200 E963070000          <1> 	jmp	GRAPHICS_WRITE
  3329                              <1> p40:
  3330                              <1> 	; al = character
  3331                              <1> 	; bl = color/attribute
  3332                              <1> 	; bh = video page
  3333                              <1> 	; cx = count of characters to write
  3334                              <1> 	;push	dx
  3335                              <1> 	; 12/04/2021
  3336 00002205 52                  <1> 	push	edx ; *
  3337 00002206 88DC                <1> 	mov	ah, bl  ; color/attribute (12/05/2016)
  3338                              <1> 	;push	ax	; save character & attribute/color
  3339                              <1> 	;push	cx
  3340                              <1> 	; 12/04/2021
  3341 00002208 50                  <1> 	push	eax ; ** ; save character & attribute/color
  3342 00002209 51                  <1> 	push	ecx ; ***
  3343 0000220A E876FDFFFF          <1> 	call 	find_position  ; get regen location and port address
  3344                              <1> 	;pop	cx
  3345                              <1> 	; 12/04/2021
  3346 0000220F 59                  <1> 	pop	ecx ; ***
  3347                              <1> 	; esi = regen location
  3348                              <1> 	; dx = status port
  3349                              <1> 	;
  3350 00002210 81C600800B00        <1> 	add	esi, 0B8000h ; 30/08/2014 (crt_base) 
  3351                              <1> 	;
  3352                              <1> 	; 18/11/2020
  3353                              <1> 	; convert display mode to a zero value 
  3354                              <1> 	; for 80 column color mode
  3355                              <1> 	;mov	ah, [CRT_MODE]	
  3356                              <1> 	;sub	ah, 2
  3357                              <1> 	;shr	ah, 1
  3358                              <1> 	;jnz	short p44    ; 26/06/2016
  3359                              <1> 
  3360                              <1> 	; 05/12/2020
  3361                              <1> 	; 18/11/2020 (TRDOS 386 v2.0.3)
  3362                              <1> 	;xor	bl, bl	; 0
  3363 00002216 803D[1E670000]03    <1> 	cmp	byte [CRT_MODE], 03h ; 80x25 color text
  3364                              <1> 	;je	short p41    ; Note: Only mode 03h and mode 01h are
  3365                              <1> 	;inc	bl	; 1  ;       in use by TRDOS 386 as text modes	
  3366                              <1> 	;jmp	short p43    ;       (07h, 00h and 02h are redirected)			
  3367                              <1> 	; 05/12/2020
  3368 0000221D 751A                <1> 	jne	short p44
  3369                              <1> p46:
  3370                              <1> 	; 05/12/2020
  3371 0000221F 3A3D[76770100]      <1> 	cmp     bh, [ACTIVE_PAGE]
  3372 00002225 7512                <1> 	jne	short p44
  3373                              <1> 
  3374                              <1> 	; WAIT FOR HORIZONTAL RETRACE OR VERTICAL RETRACE IF COLOR 80
  3375                              <1> p41:
  3376                              <1> 	; 05/12/2020
  3377 00002227 FB                  <1> 	sti		; enable interrupts first
  3378 00002228 90                  <1> 	nop
  3379                              <1> 	; 18/11/2020
  3380                              <1> 	;or	bl, bl
  3381                              <1> 	;jnz	short p44 ; mode 01h (and mode 00h) - 40x25 color text
  3382 00002229 FA                  <1> 	cli 		; block interrupts for single loop
  3383 0000222A EC                  <1> 	in	al, dx	; get status from the adapter
  3384 0000222B A808                <1> 	test	al, RVRT ; check for vertical retrace first
  3385 0000222D 7509                <1> 	jnz	short p43 ; Do fast write now if vertical retrace
  3386 0000222F A801                <1> 	test	al, RHRZ ; is horizontal retrace low
  3387 00002231 75F4                <1> 	jnz	short p41 ; wait until it is
  3388                              <1> p42:			;  wait for either retrace high
  3389 00002233 EC                  <1> 	in	al, dx ; get status again
  3390 00002234 A809                <1> 	test	al, RVRT+RHRZ ; is horizontal or vertical retrace high
  3391 00002236 74FB                <1> 	jz	short p42 ; wait until either retrace active
  3392                              <1> p43:	
  3393 00002238 FB                  <1> 	sti
  3394                              <1> p44:
  3395 00002239 668B0424            <1> 	mov	ax, [esp] ; restore the character (al) & attribute (ah)
  3396 0000223D 668906              <1> 	mov	[esi], ax
  3397                              <1> 
  3398 00002240 6649                <1> 	dec	cx
  3399 00002242 740D                <1> 	jz	short p45
  3400                              <1> 
  3401 00002244 46                  <1> 	inc	esi
  3402 00002245 46                  <1> 	inc	esi
  3403                              <1> 
  3404                              <1> 	; 05/12/2020
  3405 00002246 803D[1E670000]03    <1> 	cmp	byte [CRT_MODE], 03h
  3406 0000224D 75EA                <1> 	jne	short p44
  3407                              <1> 	;jmp	short p41
  3408 0000224F EBCE                <1> 	jmp	short p46
  3409                              <1> p45:	
  3410                              <1> 	;pop	ax
  3411                              <1> 	;pop	dx
  3412                              <1> 	; 12/04/2021
  3413 00002251 58                  <1> 	pop	eax ; **
  3414 00002252 5A                  <1> 	pop	edx ; *
  3415 00002253 C3                  <1> 	retn
  3416                              <1> 
  3417                              <1> ; 09/07/2016
  3418                              <1> ; 26/06/2016
  3419                              <1> ; 24/06/2016
  3420                              <1> ; 12/05/2016
  3421                              <1> ; 18/01/2016
  3422                              <1> ; 16/01/2016 - TRDOS 386 (TRDOS v2.0)
  3423                              <1> ; 30/06/2015
  3424                              <1> ; 27/06/2015
  3425                              <1> ; 11/03/2015
  3426                              <1> ; 02/09/2014
  3427                              <1> ; 30/08/2014
  3428                              <1> ; VIDEO FUNCTIONS
  3429                              <1> ; (write_tty - Retro UNIX 8086 v1 - U9.ASM, 01/02/2014)
  3430                              <1> 
  3431                              <1> WRITE_TTY:
  3432                              <1> 	; 09/12/2017
  3433                              <1> 	; 09/07/2016
  3434                              <1> 	; 01/07/2016
  3435                              <1> 	; 26/06/2016
  3436                              <1> 	; 24/06/2016
  3437                              <1> 	; 13/05/2016
  3438                              <1> 	; 12/05/2016
  3439                              <1> 	; 30/01/2016
  3440                              <1> 	; 18/01/2016
  3441                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
  3442                              <1> 	; 13/08/2015
  3443                              <1> 	; 02/09/2014
  3444                              <1> 	; 30/08/2014 (Retro UNIX 386 v1 - beginning)
  3445                              <1> 	; 01/02/2014 (Retro UNIX 8086 v1 - last update)
  3446                              <1> 	; 03/12/2013 (Retro UNIX 8086 v1 - beginning)	
  3447                              <1> 	; (Modified registers: EAX, EBX, ECX, EDX, ESI, EDI)
  3448                              <1> 	;
  3449                              <1> 	; INPUT -> AL = Character to be written
  3450                              <1> 	;	   BL = Color (Forecolor, Backcolor)
  3451                              <1> 	;	   BH = Video Page (0 to 7)
  3452                              <1> 
  3453                              <1> 	; 09/07/2016
  3454 00002254 803D[1E670000]07    <1>         cmp     byte [CRT_MODE], 7
  3455 0000225B 760A                <1> 	jna 	short write_tty_cga
  3456                              <1> 
  3457 0000225D E8EB0C0000          <1> 	call	vga_write_teletype
  3458 00002262 E9A7F8FFFF          <1> 	jmp	VIDEO_RETURN
  3459                              <1> 
  3460                              <1> write_tty_cga:
  3461                              <1> 	; 13/05/2016
  3462                              <1> 	;call	_write_tty
  3463                              <1> 	; 01/07/2016
  3464 00002267 E818000000          <1> 	call	_write_tty_m3
  3465 0000226C E99DF8FFFF          <1> 	jmp	VIDEO_RETURN
  3466                              <1> 
  3467                              <1> RVRT	equ	00001000b	; VIDEO VERTICAL RETRACE BIT
  3468                              <1> RHRZ	equ	00000001b	; VIDEO HORIZONTAL RETRACE BIT
  3469                              <1> 
  3470                              <1> ; Derived from "WRITE_TTY" procedure of IBM "pc-at" rombios source code
  3471                              <1> ; (06/10/1985), 'video.asm', INT 10H, VIDEO_IO
  3472                              <1> ;
  3473                              <1> ; 06/10/85  VIDEO DISPLAY BIOS
  3474                              <1> ;
  3475                              <1> ;--- WRITE_TTY ------------------------------------------------------------------
  3476                              <1> ;										:
  3477                              <1> ;   THIS INTERFACE PROVIDES A TELETYPE LIKE INTERFACE TO THE			:
  3478                              <1> ;   VIDEO CARDS. THE INPUT CHARACTER IS WRITTEN TO THE CURRENT			:
  3479                              <1> ;   CURSOR POSITION, AND THE CURSOR IS MOVED TO THE NEXT POSITION.		:
  3480                              <1> ;   IF THE CURSOR LEAVES THE LAST COLUMN OF THE FIELD, THE COLUMN		:
  3481                              <1> ;   IS SET TO ZERO, AND THE ROW VALUE IS INCREMENTED. IF THE ROW		:
  3482                              <1> ;   ROW VALUE LEAVES THE FIELD, THE CURSOR IS PLACED ON THE LAST ROW,		:
  3483                              <1> ;   FIRST COLUMN, AND THE ENTIRE SCREEN IS SCROLLED UP ONE LINE.		:
  3484                              <1> ;   WHEN THE SCREEN IS SCROLLED UP, THE ATTRIBUTE FOR FILLING THE		:
  3485                              <1> ;   NEWLY BLANKED LINE IS READ FROM THE CURSOR POSITION ON THE PREVIOUS		:
  3486                              <1> ;   LINE BEFORE THE SCROLL, IN CHARACTER MODE. IN GRAPHICS MODE,		:
  3487                              <1> ;   THE 0 COLOR IS USED.							:
  3488                              <1> ;   ENTRY --									:
  3489                              <1> ;     (AH) = CURRENT CRT MODE							:
  3490                              <1> ;     (AL) = CHARACTER TO BE WRITTEN						:
  3491                              <1> ;	    NOTE THAT BACK SPACE, CARRIAGE RETURN, BELL AND LINE FEED ARE	:
  3492                              <1> ;	    HANDLED AS COMMANDS RATHER THAN AS DISPLAY GRAPHICS CHARACTERS	:
  3493                              <1> ;     (BL) = FOREGROUND COLOR FOR CHAR WRITE IF CURRENTLY IN A GRAPHICS MODE	:
  3494                              <1> ;   EXIT -- 									:
  3495                              <1> ;     ALL REGISTERS SAVED							:
  3496                              <1> ;--------------------------------------------------------------------------------
  3497                              <1> 
  3498                              <1> ; 02/08/2022 (TRDOS 386 v2.0.5)
  3499                              <1> ; 18/11/2020 (TRDOS 386 v2.0.3)
  3500                              <1> ; 09/12/2017
  3501                              <1> ; 08/07/2016
  3502                              <1> ; 26/06/2016
  3503                              <1> ; 24/06/2016
  3504                              <1> _write_tty:
  3505                              <1> 	; 13/05/2016
  3506                              <1> 	; --- 18/11/2020 ---
  3507                              <1> 	; NOTE:
  3508                              <1> 	; Only kernel calls "_write_tty" procedure...
  3509                              <1> 	; TRDOS 386 v2 kernel uses video mode 3 for displaying
  3510                              <1> 	; (some error) messages and also mainprog command interpreter
  3511                              <1> 	; (in kernel) uses "_write_tty".
  3512                              <1> 	; So, here video mode must be set to 3 if it is not 3.
  3513                              <1>  
  3514 00002271 FA                  <1> 	cli	; disable interrupts
  3515                              <1> 	;
  3516                              <1> 	; 01/09/2014
  3517 00002272 803D[1E670000]03    <1> 	cmp	byte [CRT_MODE], 3
  3518 00002279 7409                <1> 	je	short _write_tty_m3
  3519                              <1> 	;
  3520                              <1> set_mode_3:
  3521 0000227B 53                  <1> 	push	ebx
  3522 0000227C 50                  <1> 	push	eax
  3523                              <1> 	;call	_set_mode
  3524                              <1> 	; 18/11/2020 
  3525 0000227D E89BF8FFFF          <1> 	call	set_txt_mode  ; set video mode to 03h 
  3526 00002282 58                  <1> 	pop	eax
  3527 00002283 5B                  <1> 	pop	ebx
  3528                              <1> 	;
  3529                              <1> _write_tty_m3: ; 24/06/2016 (m3 -> _write_tty_m3)
  3530 00002284 0FB6F7              <1> 	movzx 	esi, bh ; 12/05/2016
  3531                              <1> 	;shl	si, 1
  3532                              <1> 	; 02/08/2022
  3533 00002287 D1E6                <1> 	shl	esi, 1
  3534 00002289 81C6[66770100]      <1> 	add	esi, CURSOR_POSN
  3535 0000228F 668B16              <1> 	mov	dx, [esi]
  3536                              <1> 	;
  3537                              <1> 	; dx now has the current cursor position
  3538                              <1> 	;
  3539 00002292 3C0D                <1> 	cmp	al, 0Dh	; CR	; is it carriage return or control character
  3540                              <1> 	;jbe	short u8
  3541                              <1> 	; 17/04/2021
  3542 00002294 7241                <1> 	jb	short u8
  3543 00002296 746F                <1> 	je	short u9
  3544                              <1> 	;
  3545                              <1> 	; write the char to the screen
  3546                              <1> u0:	
  3547                              <1> 	; al = character
  3548                              <1> 	; bl = attribute/color
  3549                              <1> 	; bh = video page number (0 to 7)
  3550                              <1> 	;
  3551                              <1> 	;mov	cx, 1  ; 24/06/2016
  3552                              <1> 	; 02/08/2022
  3553 00002298 29C9                <1> 	sub	ecx, ecx
  3554 0000229A FEC1                <1> 	inc	cl ; ecx = 1
  3555                              <1> 	; cx = count of characters to write
  3556                              <1> 	;
  3557 0000229C E84FFFFFFF          <1> 	call	_write_c_current ; 16/01/2015
  3558                              <1> 	;
  3559                              <1> 	; position the cursor for next char
  3560 000022A1 FEC2                <1> 	inc	dl		; next column
  3561 000022A3 3A15[20670000]      <1> 	cmp	dl, [CRT_COLS]  ; test for column overflow 
  3562                              <1> 	;jne	_set_cpos
  3563                              <1> 	; 02/08/2022
  3564 000022A9 7402                <1> 	je	short u13
  3565 000022AB EB5C                <1> 	jmp	_set_cpos
  3566                              <1> u13:
  3567 000022AD B200                <1> 	mov	dl, 0		; column = 0
  3568                              <1> u10:				; (line feed found)
  3569 000022AF 80FE18              <1> 	cmp	dh, 25-1 	; check for last row
  3570 000022B2 721F                <1> 	jb 	short u6
  3571                              <1> 	;
  3572                              <1> 	; scroll required
  3573                              <1> u1:	
  3574                              <1> 	; SET CURSOR POSITION (04/12/2013)
  3575 000022B4 E850000000          <1> 	call	_set_cpos
  3576                              <1> 	;
  3577                              <1> 	; determine value to fill with during scroll
  3578                              <1> u2:
  3579                              <1> 	; bh = video page number
  3580                              <1> 	;
  3581 000022B9 E8A3FEFFFF          <1> 	call	_read_ac_current ; 18/01/2016
  3582                              <1> 	;
  3583                              <1> 	; al = character, ah = attribute
  3584                              <1> 	; bh = video page number
  3585                              <1> 	; 18/11/2020
  3586 000022BE 88E3                <1> 	mov	bl, ah ; color/attribute 	
  3587                              <1> u3:
  3588                              <1> 	;;mov	ax, 0601h 	; scroll one line
  3589                              <1> 	;;sub	cx, cx		; upper left corner
  3590                              <1> 	;;mov	dh, 25-1 	; lower right row
  3591                              <1> 	;;;mov	dl, [CRT_COLS]
  3592                              <1> 	;mov	dl, 80		; lower right column	
  3593                              <1> 	;;dec	dl
  3594                              <1> 	;;mov	dl, 79
  3595                              <1> 
  3596                              <1> 	;;call	scroll_up	; 04/12/2013
  3597                              <1> 	;;; 11/03/2015
  3598                              <1> 	; 02/09/2014
  3599                              <1> 	;;;mov	cx, [crt_ulc] ; Upper left corner  (0000h)
  3600                              <1> 	;;;mov	dx, [crt_lrc] ; Lower right corner (184Fh)
  3601                              <1> 	; 11/03/2015
  3602                              <1> 	;sub	cx, cx
  3603                              <1> 	; 17/04/2021
  3604 000022C0 29C9                <1> 	sub	ecx, ecx
  3605                              <1> 	;mov	dx, 184Fh ; dl = 79 (column), dh = 24 (row)
  3606                              <1> 	; 18/11/2020
  3607 000022C2 B618                <1> 	mov	dh, 25-1
  3608 000022C4 8A15[20670000]      <1> 	mov	dl, [CRT_COLS]
  3609 000022CA FECA                <1> 	dec	dl
  3610                              <1> 	;
  3611 000022CC B001                <1> 	mov	al, 1		; scroll 1 line up
  3612                              <1> 		; ah = attribute
  3613                              <1> 	;mov	bl, al ; 12/05/2016
  3614 000022CE E9F0FCFFFF          <1> 	jmp	_scroll_up	; 16/01/2016
  3615                              <1> ;u4:
  3616                              <1> 	;;int	10h		; video-call return
  3617                              <1> 				; scroll up the screen
  3618                              <1> 				; tty return
  3619                              <1> ;u5:
  3620                              <1> 	;retn			; return to the caller
  3621                              <1> 
  3622                              <1> u6:				; set-cursor-inc
  3623 000022D3 FEC6                <1> 	inc	dh		; next row
  3624                              <1> 				; set cursor
  3625                              <1> ;u7:					
  3626                              <1> 	;;mov	ah, 02h
  3627                              <1> 	;;jmp	short u4 	; establish the new cursor
  3628                              <1> 	;call	_set_cpos
  3629                              <1> 	;jmp 	short u5
  3630 000022D5 EB32                <1> 	jmp     _set_cpos
  3631                              <1> 
  3632                              <1> 	; check for control characters
  3633                              <1> u8:
  3634                              <1> 	;je	short u9 ; 17/04/2021
  3635 000022D7 3C0A                <1> 	cmp	al, 0Ah		; is it a line feed (0Ah)
  3636 000022D9 74D4                <1> 	je	short u10
  3637 000022DB 3C07                <1> 	cmp	al, 07h 	; is it a bell
  3638 000022DD 747C                <1> 	je	short u11
  3639 000022DF 3C08                <1> 	cmp	al, 08h		; is it a backspace
  3640                              <1> 	;jne	short u0
  3641 000022E1 741C                <1> 	je	short bs	; 12/12/2013
  3642                              <1> 	; 12/12/2013 (tab stop)
  3643 000022E3 3C09                <1> 	cmp	al, 09h		; is it a tab stop
  3644 000022E5 75B1                <1> 	jne	short u0
  3645 000022E7 88D0                <1> 	mov	al, dl
  3646                              <1> 	;cbw
  3647 000022E9 30E4                <1> 	xor	ah, ah ; 09/12/2017
  3648 000022EB B108                <1> 	mov	cl, 8
  3649 000022ED F6F1                <1> 	div	cl
  3650 000022EF 28E1                <1> 	sub	cl, ah
  3651                              <1> ts:
  3652                              <1> 	; 02/09/2014
  3653                              <1> 	; 01/09/2014
  3654                              <1> 	;mov	al, 20h
  3655                              <1> tsloop:
  3656                              <1> 	;push	cx
  3657                              <1> 	; 12/04/2021
  3658 000022F1 51                  <1> 	push	ecx ; *
  3659                              <1> 	; 18/11/2020
  3660                              <1> 	;push	ax
  3661                              <1> 	;;mov	bh, [ACTIVE_PAGE]
  3662                              <1> 	; 05/12/2020
  3663                              <1> 	;push	bx
  3664 000022F2 B020                <1> 	mov	al, 20h ; al = space (blank) 
  3665                              <1> 			; bl = color/attribute
  3666 000022F4 E88BFFFFFF          <1> 	call	_write_tty_m3 ; 24/06/2016 (m3 -> _write_tty_m3)
  3667                              <1> 	; 05/12/2020
  3668                              <1> 	; bx is preserved in '_write_tty_m3'
  3669                              <1> 	; 18/11/2020
  3670                              <1> 	;pop	bx  ; BL = color/attribute, Bh = video page 
  3671                              <1> 	;pop	ax  ; AL = character
  3672                              <1> 	; 12/04/2021
  3673                              <1> 	;pop	cx
  3674 000022F9 59                  <1> 	pop	ecx ; *
  3675 000022FA FEC9                <1> 	dec	cl
  3676 000022FC 75F3                <1> 	jnz	short tsloop
  3677 000022FE C3                  <1> 	retn
  3678                              <1> bs:	
  3679                              <1> 	; back space found
  3680                              <1> 
  3681 000022FF 08D2                <1> 	or	dl, dl 		; is it already at start of line
  3682                              <1> 	;je	short u7 	; set_cursor
  3683 00002301 7406                <1> 	jz	short _set_cpos
  3684                              <1> 	;dec	dx     		; no -- just move it back
  3685                              <1> 	; 17/04/2021
  3686 00002303 FECA                <1> 	dec	dl		; move to 1 column back
  3687                              <1> 	;jmp	short u7
  3688 00002305 EB02                <1> 	jmp	short _set_cpos
  3689                              <1> 
  3690                              <1> 	; carriage return found
  3691                              <1> u9:
  3692 00002307 B200                <1> 	mov	dl, 0 		; move to first column
  3693                              <1> 	;jmp	short u7
  3694                              <1> 	;jmp	short _set_cpos ; 30/01/2016
  3695                              <1> 
  3696                              <1> 	; line feed found
  3697                              <1> ;u10:
  3698                              <1> ;	cmp	dh, 25-1 	; bottom of screen
  3699                              <1> ;	jne	short u6 	; no, just set the cursor
  3700                              <1> ;       jmp     u1              ; yes, scroll the screen
  3701                              <1> 
  3702                              <1> _set_cpos:
  3703                              <1> 	; 02/08/2022 - TRDOS 386 v2.0.5
  3704                              <1> 	; 17/04/2021 - TRDOS 386 v2.0.4
  3705                              <1> 	; 12/05/2016 - TRDOS 386 (TRDOS v2.0)
  3706                              <1> 	; 27/06/2015
  3707                              <1> 	; 01/09/2014
  3708                              <1> 	; 30/08/2014 (Retro UNIX 386 v1)
  3709                              <1> 	;
  3710                              <1> 	; 04/12/2013 - 12/12/2013 (Retro UNIX 8086 v1) 
  3711                              <1> 	;
  3712                              <1> 	; VIDEO.ASM - 06/10/85  VIDEO DISPLAY BIOS
  3713                              <1> 	;
  3714                              <1> ;----------------------------------------------
  3715                              <1> ; SET_CPOS
  3716                              <1> ;	THIS ROUTINE SETS THE CURRENT CURSOR POSITION TO THE
  3717                              <1> ;	NEW X-Y VALUES PASSED
  3718                              <1> ; INPUT
  3719                              <1> ;	DX - ROW,COLUMN OF NEW CURSOR
  3720                              <1> ;	BH - DISPLAY PAGE OF CURSOR
  3721                              <1> ; OUTPUT
  3722                              <1> ;	CURSOR ID SET AT 6845 IF DISPLAY PAGE IS CURRENT DISPLAY
  3723                              <1> ;----------------------------------------------
  3724                              <1> 	;
  3725 00002309 BE[66770100]        <1> 	mov	esi, CURSOR_POSN
  3726 0000230E 0FB6C7              <1>         movzx   eax, bh	; BH = video page number
  3727                              <1> ;	or	al, al
  3728                              <1> ;	jz	short _set_cpos_0
  3729 00002311 D0E0                <1>         shl     al, 1   ; word offset
  3730 00002313 01C6                <1>         add     esi, eax
  3731                              <1> ;_set_cpos_0:
  3732 00002315 668916              <1> 	mov	[esi], dx ; save the pointer
  3733 00002318 383D[76770100]      <1> 	cmp	[ACTIVE_PAGE], bh
  3734 0000231E 7532                <1> 	jne	short m17
  3735                              <1> 	;call	m18	; CURSOR SET
  3736                              <1> ;m17:			; SET_CPOS_RETURN
  3737                              <1> 	; 01/09/2014
  3738                              <1> ;	retn
  3739                              <1> 		; DX = row/column
  3740                              <1> m18:
  3741 00002320 E852FCFFFF          <1> 	call	position ; determine location in regen buffer	
  3742 00002325 668B0D[64770100]    <1> 	mov	cx, [CRT_START]
  3743 0000232C 6601C1              <1> 	add	cx, ax  ; add char position in regen buffer
  3744                              <1> 			; to the start address (offset) for this page
  3745 0000232F 66D1E9              <1> 	shr	cx, 1	; divide by 2 for char only count
  3746 00002332 B40E                <1> 	mov	ah, 14	; register number for cursor
  3747                              <1> 	;call	m16	; output value to the 6845	
  3748                              <1> 	;retn
  3749                              <1> 
  3750                              <1> 	;-----	THIS ROUTINE OUTPUTS THE CX REGISTER
  3751                              <1> 	;	TO THE 6845 REGISTERS NAMED IN (AH)
  3752                              <1> m16:
  3753 00002334 FA                  <1> 	cli
  3754                              <1> 	;mov	dx, [addr_6845] ; address register
  3755 00002335 66BAD403            <1> 	mov 	dx, 03D4h ; I/O address of color card
  3756 00002339 88E0                <1> 	mov	al, ah	; get value
  3757 0000233B EE                  <1> 	out	dx, al	; register set
  3758                              <1> 	;inc	dx	; data register
  3759                              <1> 	; 17/04/2021
  3760 0000233C FEC2                <1> 	inc	dl
  3761 0000233E EB00                <1> 	jmp	$+2	; i/o delay
  3762 00002340 88E8                <1> 	mov	al, ch	; data
  3763 00002342 EE                  <1> 	out	dx, al	
  3764                              <1> 	;dec	dx	
  3765                              <1> 	; 17/04/2021
  3766 00002343 FECA                <1> 	dec	dl
  3767 00002345 88E0                <1> 	mov	al, ah
  3768 00002347 FEC0                <1> 	inc	al	; point to other data register
  3769 00002349 EE                  <1> 	out	dx, al	; set for second register
  3770                              <1> 	;inc	dx
  3771                              <1> 	; 17/04/2021
  3772 0000234A FEC2                <1> 	inc	dl
  3773 0000234C EB00                <1> 	jmp	$+2	; i/o delay
  3774 0000234E 88C8                <1> 	mov	al, cl	; second data value
  3775 00002350 EE                  <1> 	out	dx, al
  3776 00002351 FB                  <1> 	sti
  3777                              <1> m17:
  3778 00002352 C3                  <1> 	retn
  3779                              <1> 
  3780                              <1> _beep:
  3781                              <1> 	; 12/02/2021 (TRDOS v2.0.3)
  3782 00002353 FA                  <1> 	cli
  3783 00002354 E811000000          <1> 	call	beep
  3784 00002359 FB                  <1> 	sti
  3785 0000235A C3                  <1> 	retn
  3786                              <1> 
  3787                              <1> beeper: 
  3788                              <1> 	; 04/08/2016
  3789                              <1> 	; 12/05/2016 - TRDOS 386 (TRDOS v2.0)
  3790                              <1> 	; 30/08/2014 (Retro UNIX 386 v1)
  3791                              <1> 	; 18/01/2014
  3792                              <1> 	; 03/12/2013
  3793                              <1> 	; bell found
  3794                              <1> u11:
  3795 0000235B FB                  <1> 	sti
  3796 0000235C 3A3D[76770100]      <1> 	cmp	bh, [ACTIVE_PAGE]
  3797 00002362 7552                <1> 	jne	short u12	; Do not sound the beep 
  3798                              <1> 				; if it is not written on the active page
  3799                              <1> beeper_gfx: ; 04/08/2016
  3800 00002364 66B93305            <1> 	mov	cx, 1331 	; divisor for 896 hz tone
  3801 00002368 B31F                <1> 	mov	bl, 31		; set count for 31/64 second for beep
  3802                              <1> 	;call	beep		; sound the pod bell
  3803                              <1> 	;jmp	short u5 	; tty_return
  3804                              <1> 	;retn
  3805                              <1> 	
  3806                              <1> TIMER	equ 	040h   		; 8254 TIMER - BASE ADDRESS
  3807                              <1> PORT_B	equ	061h		; PORT B READ/WRITE DIAGNOSTIC REGISTER
  3808                              <1> GATE2	equ	00000001b	; TIMER 2 INPUT CATE CLOCK BIT
  3809                              <1> SPK2	equ	00000010b	; SPEAKER OUTPUT DATA ENABLE BIT
  3810                              <1> 
  3811                              <1> beep:
  3812                              <1> 	; 12/02/2021
  3813                              <1> 	; 07/02/2015
  3814                              <1> 	; 30/08/2014 (Retro UNIX 386 v1)
  3815                              <1> 	; 18/01/2014
  3816                              <1> 	; 03/12/2013
  3817                              <1> 	;
  3818                              <1> 	; TEST4.ASM - 06/10/85  POST AND BIOS UTILITY ROUTINES
  3819                              <1> 	;
  3820                              <1> 	; ROUTINE TO SOUND THE BEEPER USING TIMER 2 FOR TONE
  3821                              <1> 	;
  3822                              <1> 	; ENTRY:
  3823                              <1> 	;    (BL) = DURATION COUNTER ( 1 FOR 1/64 SECOND )
  3824                              <1> 	;    (CX) = FREQUENCY DIVISOR (1193180/FREQUENCY) (1331 FOR 886 HZ)
  3825                              <1> 	; EXIT:				:
  3826                              <1> 	;    (AX),(BL),(CX) MODIFIED.
  3827                              <1> 
  3828 0000236A 9C                  <1> 	pushfd  ; 18/01/2014	; save interrupt status
  3829 0000236B FA                  <1> 	cli			; block interrupts during update
  3830 0000236C B0B6                <1> 	mov	al, 10110110b	; select timer 2, lsb, msb binary
  3831 0000236E E643                <1> 	out	TIMER+3, al 	; write timer mode register
  3832 00002370 EB00                <1> 	jmp	$+2		; I/O delay
  3833 00002372 88C8                <1> 	mov	al, cl		; divisor for hz (low)
  3834 00002374 E642                <1> 	out	TIMER+2,AL	; write timer 2 count - lsb
  3835 00002376 EB00                <1> 	jmp	$+2		; I/O delay
  3836 00002378 88E8                <1> 	mov	al, ch		; divisor for hz (high)
  3837 0000237A E642                <1> 	out	TIMER+2, al	; write timer 2 count - msb
  3838 0000237C E461                <1> 	in	al, PORT_B	; get current setting of port
  3839 0000237E 88C4                <1> 	mov	ah, al		; save that setting
  3840 00002380 0C03                <1> 	or	al, GATE2+SPK2	; gate timer 2 and turn speaker on
  3841 00002382 E661                <1> 	out	PORT_B, al	; and restore interrupt status
  3842                              <1> 	; 12/02/2021
  3843 00002384 9D                  <1> 	popfd	; 18/01/2014
  3844                              <1> 	;sti
  3845                              <1> g7:				; 1/64 second per count (bl)
  3846 00002385 B90B040000          <1> 	mov	ecx, 1035	; delay count for 1/64 of a second
  3847 0000238A E828000000          <1> 	call	waitf		; go to beep delay 1/64 count
  3848 0000238F FECB                <1> 	dec	bl		; (bl) length count expired?
  3849 00002391 75F2                <1> 	jnz	short g7	; no - continue beeping speaker
  3850                              <1> 	;
  3851 00002393 9C                  <1> 	pushfd	; 12/02/2021	; save interrupt status
  3852 00002394 FA                  <1> 	cli  	; 18/01/2014	; block interrupts during update
  3853 00002395 E461                <1> 	in	al, PORT_B	; get current port value
  3854                              <1>         ;or	al, not (GATE2+SPK2) ; isolate current speaker bits in case
  3855 00002397 0CFC                <1>         or      al, ~(GATE2+SPK2)
  3856 00002399 20C4                <1>         and	ah, al		; someone turned them off during beep
  3857 0000239B 88E0                <1> 	mov	al, ah		; recover value of port
  3858                              <1>         ;or	al, not (GATE2+SPK2) ; force speaker data off
  3859 0000239D 0CFC                <1> 	or 	al, ~(GATE2+SPK2) ; isolate current speaker bits in case
  3860 0000239F E661                <1> 	out	PORT_B, al	; and stop speaker timer
  3861 000023A1 9D                  <1> 	popfd	; 12/02/2021		; restore interrupt flag state
  3862                              <1> 	;sti
  3863                              <1> 	;mov	ecx, 1035	; force 1/64 second delay (short)
  3864                              <1> 	; 17/04/2021
  3865 000023A2 66B90B04            <1> 	mov	cx, 1035
  3866 000023A6 E80C000000          <1> 	call	waitf		; minimum delay between all beeps
  3867 000023AB 9C                  <1> 	pushfd			; save interrupt status
  3868 000023AC FA                  <1> 	cli			; block interrupts during update
  3869 000023AD E461                <1> 	in	al, PORT_B	; get current port value in case
  3870 000023AF 2403                <1> 	and	al, GATE2+SPK2	; someone turned them on
  3871 000023B1 08E0                <1> 	or	al, ah		; recover value of port_b
  3872 000023B3 E661                <1> 	out	PORT_B, al	; restore speaker status
  3873 000023B5 9D                  <1> 	popfd			; restore interrupt flag state
  3874                              <1> u12:	
  3875 000023B6 C3                  <1> 	retn
  3876                              <1> 
  3877                              <1> REFRESH_BIT equ	00010000b 	; REFRESH TEST BIT
  3878                              <1> 
  3879                              <1> WAITF:
  3880                              <1> waitf:
  3881                              <1> 	; 30/08/2014 (Retro UNIX 386 v1)
  3882                              <1> 	; 03/12/2013
  3883                              <1> 	;
  3884                              <1> ;	push	ax		; save work register (ah)
  3885                              <1> ;waitf1:
  3886                              <1> 				; use timer 1 output bits
  3887                              <1> ;	in	al, PORT_B	; read current counter output status
  3888                              <1> ;	and	al, REFRESH_BIT	; mask for refresh determine bit
  3889                              <1> ;	cmp	al, ah		; did it just change
  3890                              <1> ;	je	short waitf1	; wait for a change in output line
  3891                              <1> ;	;
  3892                              <1> ;	mov	ah, al		; save new lflag state
  3893                              <1> ;	loop	waitf1		; decrement half cycles till count end
  3894                              <1> ;	;
  3895                              <1> ;	pop	ax		; restore (ah)
  3896                              <1> ;	retn			; return (cx)=0
  3897                              <1> 
  3898                              <1> ; 06/02/2015 (unix386.s <-- dsectrm2.s)
  3899                              <1> ; 17/12/2014 (dsectrm2.s)
  3900                              <1> ; WAITF
  3901                              <1> ; /// IBM PC-XT Model 286 System BIOS Source Code - Test 4 - 06/10/85 ///
  3902                              <1> ;
  3903                              <1> ;---WAITF-----------------------------------------------------------------------
  3904                              <1> ;	FIXED TIME WAIT ROUTINE (HARDWARE CONTROLLED - NOT PROCESSOR)
  3905                              <1> ; ENTRY:
  3906                              <1> ;	(CX) =	COUNT OF 15.085737 MICROSECOND INTERVALS TO WAIT
  3907                              <1> ;	      	MEMORY REFRESH TIMER 1 OUTPUT USED AS REFERENCE
  3908                              <1> ; EXIT:
  3909                              <1> ;	       	AFTER (CX) TIME COUNT (PLUS OR MINUS 16 MICROSECONDS)
  3910                              <1> ;	(CX) = 0	
  3911                              <1> ;-------------------------------------------------------------------------------
  3912                              <1> 
  3913                              <1> ; Refresh period: 30 micro seconds (15-80 us)
  3914                              <1> ; (16/12/2014 - AWARDBIOS 1999 - ATORGS.ASM, WAIT_REFRESH)
  3915                              <1> 
  3916                              <1> ;WAITF:					; DELAY FOR (CX)*15.085737 US
  3917                              <1> 	;push	AX			; SAVE WORK REGISTER (AH)
  3918                              <1> 	; 11/04/2021
  3919 000023B7 50                  <1> 	push	eax
  3920                              <1> 	; 16/12/2014
  3921                              <1> 	;shr	cx, 1			; convert to count of 30 micro seconds
  3922 000023B8 D1E9                <1> 	shr	ecx, 1	; 21/02/2015
  3923                              <1> ;17/12/2014	
  3924                              <1> ;WAITF1:
  3925                              <1> ;	in	al, PORT_B   ;061h	; READ CURRENT COUNTER OUTPUT STATUS
  3926                              <1> ;	and	al, REFRESH_BIT	;00010000b ; MASK FOR REFRESH DETERMINE BIT
  3927                              <1> ;	cmp	al, ah			; DID IT JUST CHANGE
  3928                              <1> ;	je	short WAITF1		; WAIT FOR A CHANGE IN OUTPUT LINE
  3929                              <1> ;	mov	ah, al			; SAVE NEW FLAG STATE
  3930                              <1> ;	loop	WAITF1			; DECREMENT HALF CYCLES TILL COUNT END		
  3931                              <1> 	;
  3932                              <1> 	; 17/12/2014
  3933                              <1> 	;
  3934                              <1> 	; Modification from 'WAIT_REFRESH' procedure of AWARD BIOS - 1999
  3935                              <1> 	;
  3936                              <1> ;WAIT_REFRESH:  Uses port 61, bit 4 to have CPU speed independent waiting.
  3937                              <1> ;   	INPUT:  CX = number of refresh periods to wait
  3938                              <1> ;     	       (refresh periods = 1 per 30 microseconds on most machines)
  3939                              <1> WR_STATE_0:
  3940 000023BA E461                <1> 	in	al, PORT_B		; IN AL,SYS1
  3941 000023BC A810                <1> 	test	al, 010h
  3942 000023BE 74FA                <1> 	JZ	short WR_STATE_0
  3943                              <1> WR_STATE_1:
  3944 000023C0 E461                <1> 	in	al, PORT_B		; IN AL,SYS1
  3945 000023C2 A810                <1> 	test	al, 010h
  3946 000023C4 75FA                <1> 	jnz	short WR_STATE_1
  3947 000023C6 E2F2                <1>         loop    WR_STATE_0
  3948                              <1> 	;
  3949                              <1> 	;pop	ax			; RESTORE (AH)
  3950                              <1> 	; 11/04/2021
  3951 000023C8 58                  <1> 	pop	eax
  3952 000023C9 C3                  <1> 	retn				; (CX) = 0
  3953                              <1> 
  3954                              <1> ; 03/08/2022
  3955                              <1> ; 02/08/2022 - TRDOS 386 Kernel v2.0.5
  3956                              <1> ; 09/07/2016
  3957                              <1> ; 01/07/2016
  3958                              <1> ; 24/06/2016
  3959                              <1> ; 23/06/2016 - TRDOS 386 (TRDOS v2.0)
  3960                              <1> ; VIDEO1.ASM - 24/03/1985 (IBM PC-AT BIOS source code)
  3961                              <1> ;-------------------------------------------------------------------------------
  3962                              <1> ; WRITE_STRING								       :
  3963                              <1> ;	THIS ROUTINE WRITES A STRING OF CHARACTERS TO THE CRT.		       :
  3964                              <1> ; INPUT 								       :
  3965                              <1> ;	(AL) = WRITE STRING COMMAND  0 - 3				       :
  3966                              <1> ;	(BH) = DISPLAY PAGE (ACTIVE PAGE)				       :
  3967                              <1> ;	(CX) = COUNT OF CHARACTERS TO WRITE, IF (CX) = 0 THEN RETURN	       :
  3968                              <1> ;	(DX) = CURSOR POSITION FOR START OF STRING WRITE		       :
  3969                              <1> ;	(BL) = ATTRIBUTE OF CHARACTER TO WRITE IF (AL) = 0  OR	(AL) = 1       :
  3970                              <1> ;	(EBP) = SOURCE STRING OFFSET					       :
  3971                              <1> ; OUTPUT								       :
  3972                              <1> ;	NONE								       :
  3973                              <1> ;-------------------------------------------------------------------------------
  3974                              <1> 
  3975                              <1> ; AL = 00h: Assign all characters the attribute in BL; do not update cursor
  3976                              <1> ; AL = 01h: Assign all characters the attribute in BL; update cursor
  3977                              <1> ; AL = 02h: Use attributes in string; do not update cursor
  3978                              <1> ; AL = 03h: Use attributes in string; update cursor
  3979                              <1> 
  3980                              <1> WRITE_STRING:
  3981                              <1> 	; 03/08/2022
  3982                              <1> 	; 02/08/2022
  3983                              <1> 	; 12/09/2016
  3984                              <1> 	; 09/07/2016
  3985                              <1> 	;cmp	byte [CRT_MODE], 7 ; 6?!
  3986                              <1> 	;ja	VIDEO_RETURN		; not a valid function for VGA modes
  3987                              <1> 	;
  3988 000023CA A2[D8830100]        <1> 	mov	[w_str_cmd], al		; save (AL) command
  3989 000023CF 3C04                <1> 	cmp	al, 4			; TEST FOR INVALID WRITE STRING OPTION
  3990                              <1> 	;jnb	VIDEO_RETURN		; IF OPTION INVALID THEN RETURN
  3991                              <1> 	; 02/08/2022
  3992 000023D1 7361                <1> 	jnb	short P55
  3993                              <1> 
  3994                              <1>         ;jcxz	VIDEO_RETURN		; IF ZERO LENGTH STRING THEN RETURN
  3995                              <1> 
  3996 000023D3 67E35E              <1>         jcxz    P55			; 01/07/2016
  3997                              <1> 
  3998                              <1> 	; 01/07/2016
  3999                              <1> 	;and	ecx, 0FFFFh
  4000                              <1> 	; ecx = byte count
  4001                              <1> 	;push	ecx
  4002 000023D6 89EE                <1> 	mov	esi, ebp ; user buffer
  4003 000023D8 BF00000700          <1> 	mov	edi, Cluster_Buffer  ; system buffer
  4004 000023DD E811EA0000          <1> 	call	transfer_from_user_buffer
  4005                              <1> 	;pop	ecx
  4006                              <1> 	;jc	VIDEO_RETURN
  4007                              <1> 	; 02/08/2022
  4008 000023E2 7250                <1> 	jc	short P55
  4009                              <1> 	; ecx = transfer (byte) count = character count
  4010 000023E4 BD00000700          <1> 	mov	ebp, Cluster_Buffer
  4011                              <1> 	; 12/09/2016
  4012 000023E9 803D[1E670000]07    <1> 	cmp	byte [CRT_MODE], 7 ; 6?!
  4013                              <1> 	;ja	vga_write_string
  4014                              <1> 	; 02/08/2022
  4015 000023F0 7605                <1> 	jna	short P57
  4016 000023F2 E99C000000          <1> 	jmp	vga_write_string
  4017                              <1> P57:
  4018 000023F7 0FB6F7              <1> 	movzx	esi, bh			; GET CURRENT CURSOR PAGE
  4019                              <1> 	;sal	si, 1			; CONVERT TO PAGE OFFSET (SI = PAGE)
  4020                              <1> 	; 02/08/2022
  4021 000023FA D1E6                <1> 	sal	esi, 1
  4022                              <1> 	; *****
  4023 000023FC 66FFB6[66770100]    <1> 	push	word [esi+CURSOR_POSN]	; SAVE CURRENT CURSOR POSITION IN STACK
  4024                              <1> 
  4025                              <1> 	;mov	ax, 0200h		; SET NEW CURSOR POSITION
  4026                              <1> 	;int	10h
  4027                              <1> P50next:	
  4028 00002403 51                  <1> 	push	ecx ; ****
  4029 00002404 53                  <1> 	push	ebx ; *** ; 18/11/2020
  4030 00002405 56                  <1> 	push	esi ; **
  4031 00002406 52                  <1> 	push	edx ; *
  4032 00002407 E8FDFEFFFF          <1> 	call	_set_cpos
  4033                              <1> P50:
  4034 0000240C 8A4500              <1> 	mov	al, [ebp]		; GET CHARACTER FROM INPUT STRING
  4035 0000240F 45                  <1> 	inc	ebp			; BUMP POINTER TO CHARACTER
  4036                              <1> 
  4037                              <1> ;-----	TEST FOR SPECIAL CHARACTER'S
  4038                              <1> 
  4039 00002410 3C08                <1> 	cmp	al, 08h			; IS IT A BACKSPACE
  4040 00002412 7410                <1> 	je	short P51		; BACK_SPACE
  4041 00002414 3C0D                <1> 	cmp	al, 0Dh ; CR		; IS IT CARRIAGE RETURN
  4042 00002416 740C                <1> 	je	short P51		; CAR_RET
  4043 00002418 3C0A                <1> 	cmp	al, 0Ah ; LF		; IS IT A LINE FEED
  4044 0000241A 7408                <1> 	je	short P51		; LINE_FEED
  4045                              <1> 	; 18/11/2020
  4046 0000241C 3C09                <1> 	cmp	al, 09h			; is it a tab stop
  4047 0000241E 7404                <1> 	je	short P51
  4048                              <1> 	;
  4049 00002420 3C07                <1> 	cmp	al, 07h			; IS IT A BELL
  4050 00002422 7515                <1> 	jne	short P52		; IF NOT THEN DO WRITE CHARACTER
  4051                              <1> P51:
  4052                              <1> 	;mov	ah, 0Eh			; TTY_CHARACTER_WRITE
  4053                              <1> 	;int	10h			; WRITE TTY CHARACTER TO THE CRT
  4054                              <1> 	
  4055 00002424 E85BFEFFFF          <1> 	call	_write_tty_m3
  4056                              <1> 
  4057 00002429 5A                  <1> 	pop	edx ; *
  4058 0000242A 5E                  <1> 	pop	esi ; **
  4059                              <1> 
  4060 0000242B 668B96[66770100]    <1> 	mov	dx, [esi+CURSOR_POSN]	; GET CURRENT CURSOR POSITION
  4061 00002432 EB44                <1> 	jmp	short P54		; SET CURSOR POSITION AND CONTINUE
  4062                              <1> P55:
  4063 00002434 E9D5F6FFFF          <1> 	jmp	VIDEO_RETURN
  4064                              <1> P52:
  4065                              <1> 	;mov	cx, 1			; SET CHARACTER WRITE AMOUNT TO ONE
  4066                              <1> 	; 02/08/2022
  4067 00002439 29C9                <1> 	sub	ecx, ecx
  4068 0000243B FEC1                <1> 	inc	cl
  4069                              <1> 	; ecx = 1
  4070 0000243D 803D[D8830100]02    <1> 	cmp	byte [w_str_cmd], 2	; IS THE ATTRIBUTE IN THE STRING
  4071 00002444 7204                <1> 	jb	short P53		; IF NOT THEN SKIP
  4072 00002446 8A5D00              <1> 	mov	bl, [ebp]		; ELSE GET NEW ATTRIBUTE
  4073 00002449 45                  <1> 	inc	ebp			; BUMP STRING POINTER
  4074                              <1> P53:
  4075                              <1> 	;mov	ah, 09h			; GOT_CHARACTER
  4076                              <1> 	;int	10h			; WRITE CHARACTER TO THE CRT
  4077                              <1> 
  4078 0000244A E8A1FDFFFF          <1> 	call	_write_c_current
  4079                              <1> 	
  4080 0000244F 5A                  <1> 	pop	edx ; *	
  4081                              <1> 
  4082                              <1> 	; 05/12/2020
  4083                              <1> 	; bx is preserved in '_write_c_current'
  4084                              <1> 	; 18/11/2020
  4085                              <1> 	;mov	ebx, [esp+4]	; ***
  4086                              <1> 
  4087 00002450 0FB6F7              <1> 	movzx	esi, bh ; video page number (0 to 7)	
  4088 00002453 889E[27670000]      <1> 	mov	[esi+chr_attrib], bl ; color/attribute
  4089                              <1> 
  4090 00002459 FEC2                <1> 	inc	dl			; INCREMENT COLUMN COUNTER
  4091 0000245B 3A15[20670000]      <1> 	cmp	dl, [CRT_COLS]		; IF COLS ARE WITHIN RANGE FOR THIS MODE
  4092                              <1> 	;jb	short P54		;    THEN GO TO COLUMNS SET
  4093 00002461 7214                <1> 	jb	short P56 ; 05/12/2020
  4094 00002463 FEC6                <1> 	inc	dh			; BUMP ROW COUNTER BY ONE
  4095 00002465 28D2                <1> 	sub	dl, dl			; SET COLUMN COUNTER TO ZERO
  4096 00002467 80FE19              <1> 	cmp	dh, 25			; IF ROWS ARE LESS THAN 25 THEN
  4097                              <1> 	;jb	short P54		; GO TO ROWS_COLUMNS_SET
  4098 0000246A 720B                <1> 	jb	short P56 ; 05/12/2020
  4099                              <1> 
  4100                              <1> 	; 18/11/2020
  4101                              <1> 	;mov	ax, 0E0Ah		; ELSE SCROLL SCREEN
  4102                              <1> 	;int	10h			; RESET ROW COUNTER TO 24
  4103                              <1> 
  4104                              <1> 	; 18/11/2020
  4105 0000246C B00A                <1> 	mov	al, 0Ah	; line feed
  4106                              <1> 
  4107 0000246E E811FEFFFF          <1> 	call	_write_tty_m3
  4108                              <1> 	
  4109 00002473 66BA0018            <1> 	mov	dx, 1800h		; Column = 0, Row = 24
  4110                              <1> P56:	
  4111                              <1> 	; 05/12/2020
  4112                              <1> 	; 18/11/2020
  4113 00002477 5E                  <1> 	pop	esi ; **
  4114                              <1> P54:					; ROW_COLUMNS_SET
  4115                              <1> 	;mov	ax, 0200h		; SET NEW CURSOR POSITION COMMAND
  4116                              <1> 	;int	10h			; ESTABLISH NEW CURSOR POSITION
  4117                              <1> 
  4118                              <1> 	; 18/11/2020
  4119 00002478 5B                  <1> 	pop	ebx ; ***
  4120 00002479 59                  <1> 	pop	ecx ; ****
  4121                              <1> 
  4122                              <1> 	;loop	P50			; DO IT ONCE MORE UNTIL (CX) = ZERO
  4123 0000247A 6649                <1> 	dec	cx
  4124 0000247C 7585                <1> 	jnz	short P50next
  4125                              <1> 
  4126 0000247E 665A                <1> 	pop	dx  ; *****		; RESTORE OLD CURSOR COORDINATES
  4127                              <1> 	
  4128 00002480 F605[D8830100]01    <1> 	test	byte [w_str_cmd], 1	; IF CURSOR WAS NOT TO BE MOVED
  4129                              <1> 	;jnz	VIDEO_RETURN		; THEN EXIT WITHOUT RESETTING OLD VALUE
  4130                              <1> 	; 03/08/2022
  4131 00002487 7505                <1> 	jnz	short P58
  4132                              <1> 	
  4133                              <1> 	;mov	ax, 0200h		; ELSE RESTORE OLD CURSOR POSITION
  4134                              <1> 	;int	10h
  4135                              <1> 					; DONE - EXIT WRITE STRING
  4136 00002489 E87BFEFFFF          <1> 	call	_set_cpos
  4137                              <1> P58:
  4138 0000248E E97BF6FFFF          <1> 	jmp	VIDEO_RETURN		; RETURN TO CALLER
  4139                              <1> 
  4140                              <1> vga_write_string:
  4141                              <1> 	; 04/08/2022 - TRDOS 386 Kernel v2.0.5
  4142                              <1> 	; 12/09/2016 - TRDOS 386 (TRDOS v2.0)
  4143                              <1> 	;
  4144                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  4145                              <1> 	; vgabios-0.7a (2011)
  4146                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  4147                              <1> 	; 'vgabios.c', ' biosfn_write_string'
  4148                              <1> 
  4149                              <1> 	; INPUT 								  :
  4150                              <1> 	;	(AL) = WRITE STRING COMMAND  0 - 3				  :
  4151                              <1> 	;	(BH) = DISPLAY PAGE (ACTIVE PAGE)				  :
  4152                              <1> 	;	(CX) = COUNT OF CHARACTERS TO WRITE, IF (CX) = 0 THEN RETURN	  :
  4153                              <1> 	;	(DX) = CURSOR POSITION FOR START OF STRING WRITE		  :
  4154                              <1> 	;	(BL) = ATTRIBUTE OF CHARACTER TO WRITE IF (AL) = 0  OR	(AL) = 1  :
  4155                              <1> 	;	(EBP) = SOURCE STRING OFFSET					  :
  4156                              <1> 	; OUTPUT								  :
  4157                              <1> 	;	NONE								  :
  4158                              <1> 	;-------------------------------------------------------------------------;
  4159                              <1> 
  4160                              <1> 	; AL = 00h: Assign all characters the attribute in BL; do not update cursor
  4161                              <1> 	; AL = 01h: Assign all characters the attribute in BL; update cursor
  4162                              <1> 	; AL = 02h: Use attributes in string; do not update cursor
  4163                              <1> 	; AL = 03h: Use attributes in string; update cursor
  4164                              <1> 	
  4165                              <1> 	; biosfn_write_string(GET_AL(),GET_BH(),GET_BL(),CX,GET_DH(),GET_DL(),ES,BP);
  4166                              <1> 	; static void biosfn_write_string (flag,page,attr,count,row,col,seg,offset) 
  4167                              <1> 
  4168                              <1> 	; // Read curs info for the page
  4169                              <1>  	; biosfn_get_cursor_pos(page,&dummy,&oldcurs);
  4170                              <1> 	; bh = video page = 0
  4171                              <1> 	;movzx	esi, word [CURSOR_POSN] ; current cursor position for video page 0
  4172                              <1> 	
  4173                              <1> 	; // if row=0xff special case : use current cursor position
  4174                              <1> 	; if(row==0xff)
  4175                              <1> 	;  {col=oldcurs&0x00ff;
  4176                              <1> 	;   row=(oldcurs&0xff00)>>8;
  4177                              <1> 	;  }
  4178                              <1> 
  4179                              <1> 	;mov	al, [w_str_cmd]
  4180                              <1> 
  4181 00002493 80FEFF              <1> 	cmp	dh, 0FFh
  4182 00002496 7407                <1> 	je	short vga_wstr_1 ; user current cursor position
  4183                              <1> vga_wstr_0:
  4184                              <1> 	; set cursor position
  4185 00002498 668915[66770100]    <1> 	mov	[CURSOR_POSN], dx ; save cursor pos for pg 0
  4186                              <1> vga_wstr_1:
  4187 0000249F 66FF35[66770100]    <1> 	push	word [CURSOR_POSN] ; *
  4188                              <1> 
  4189                              <1> 	; ebp = string offset in system buffer (user buffer was copied to)
  4190                              <1> 	
  4191                              <1> 	; while(count--!=0)
  4192                              <1> 	;  {
  4193                              <1> 	;   car=read_byte(seg,offset++);
  4194                              <1> 	;   if((flag&0x02)!=0)
  4195                              <1> 	;    attr=read_byte(seg,offset++);
  4196                              <1> 	;    biosfn_write_teletype(car,page,attr,WITH_ATTR);
  4197                              <1> 	;  }
  4198                              <1> 
  4199                              <1> 	;push	eax ; **
  4200                              <1> 	;test	al, 2
  4201 000024A6 F605[D8830100]02    <1> 	test	byte [w_str_cmd], 2
  4202 000024AD 751D                <1> 	jnz	short vga_wstr_3
  4203 000024AF 881D[77770100]      <1> 	mov	[ccolor], bl
  4204                              <1> vga_wstr_2:
  4205 000024B5 51                  <1> 	push	ecx
  4206 000024B6 8A4500              <1> 	mov	al, [ebp]
  4207 000024B9 E88F0A0000          <1> 	call	vga_write_teletype
  4208 000024BE 59                  <1> 	pop	ecx
  4209 000024BF 6649                <1> 	dec	cx
  4210 000024C1 741E                <1> 	jz	short vga_wstr_4
  4211 000024C3 45                  <1> 	inc	ebp
  4212 000024C4 8A1D[77770100]      <1> 	mov	bl, [ccolor]
  4213 000024CA EBE9                <1> 	jmp	short vga_wstr_2
  4214                              <1> vga_wstr_3:
  4215 000024CC 51                  <1> 	push	ecx
  4216 000024CD 8A4500              <1> 	mov	al, [ebp]
  4217 000024D0 45                  <1> 	inc	ebp
  4218 000024D1 8A5D00              <1> 	mov	bl, [ebp]
  4219 000024D4 E8740A0000          <1> 	call	vga_write_teletype
  4220 000024D9 59                  <1> 	pop	ecx
  4221 000024DA 6649                <1> 	dec	cx
  4222 000024DC 7403                <1> 	jz	short vga_wstr_4
  4223 000024DE 45                  <1> 	inc	ebp
  4224 000024DF EBEB                <1> 	jmp	short vga_wstr_3
  4225                              <1> vga_wstr_4:
  4226                              <1> 	; // Set back curs pos 
  4227                              <1> 	; if((flag&0x01)==0)
  4228                              <1> 	;  biosfn_set_cursor_pos(page,oldcurs);
  4229                              <1> 	; }
  4230                              <1> 	;pop	eax ; **
  4231 000024E1 665A                <1> 	pop	dx ; word [CURSOR_POSN] ; *
  4232                              <1> 	;test	al, 1
  4233 000024E3 F605[D8830100]01    <1> 	test	byte [w_str_cmd], 1
  4234                              <1> 	;jnz	VIDEO_RETURN
  4235                              <1> 	; 04/08/2022
  4236 000024EA 7507                <1> 	jnz	short vga_wstr_5
  4237 000024EC 668915[66770100]    <1> 	mov 	[CURSOR_POSN], dx
  4238                              <1> vga_wstr_5:
  4239 000024F3 E916F6FFFF          <1> 	jmp	VIDEO_RETURN
  4240                              <1> 
  4241                              <1> ; 03/08/2022 - TRDOS 386 Kernel v2.0.5
  4242                              <1> ; 07/07/2016
  4243                              <1> ; 27/06/2016 - TRDOS 386 (TRDOS v2.0)
  4244                              <1> ; VIDEO1.ASM - 24/03/1985 (IBM PC-AT BIOS source code)
  4245                              <1> ;------------------------------------------------------
  4246                              <1> ;  SCROLL UP
  4247                              <1> ;   THIS ROUTINE SCROLLS UP THE INFORMATION ON THE CRT
  4248                              <1> ; ENTRY ---
  4249                              <1> ;  CH,CL = UPPER LEFT CORNER OF REGION TO SCROLL
  4250                              <1> ;  DH,DL = LOWER RIGHT CORNER OF REGION TO SCROLL
  4251                              <1> ;   BOTH OF THE ABOVE ARE IN CHARACTER POSITIONS
  4252                              <1> ;  BH = FILL VALUE FOR BLANKED LINES
  4253                              <1> ;  AL = # LINES TO SCROLL (AL=0 MEANS BLANK THE ENTIRE FIELD)
  4254                              <1> ;  DS = DATA SEGMENT
  4255                              <1> ;  ES = REGEN SEGMENT
  4256                              <1> ; EXIT --
  4257                              <1> ;  NOTHING, THE SCREEN IS SCROLLED
  4258                              <1> ;--------------------------------------------------------
  4259                              <1> 
  4260                              <1> 	; cl = upper left column
  4261                              <1> 	; ch = upper left row
  4262                              <1> 	; dl = lower rigth column
  4263                              <1> 	; dh = lower right row
  4264                              <1> 	;
  4265                              <1> 	; al = line count (AL=0 means blank entire fields)
  4266                              <1> 	; bl = fill value for blanked lines	
  4267                              <1> 	; bh = unused
  4268                              <1> 
  4269                              <1> GRAPHICS_UP:
  4270                              <1> 	; 07/07/2016
  4271                              <1> 	; AH = Current video mode, [CRT_MODE]
  4272 000024F8 80FC07              <1> 	cmp	ah, 7
  4273 000024FB 7762                <1> 	ja	short vga_graphics_up
  4274                              <1> 	;je	n0
  4275                              <1> 
  4276 000024FD 88C7                <1> 	mov	bh, al			; save line count in BH
  4277                              <1> 	;mov	ax, cx			; GET UPPER LEFT POSITION INTO AX REG
  4278                              <1> 	; 03/08/2022
  4279 000024FF 89C8                <1> 	mov	eax, ecx
  4280                              <1> 
  4281                              <1> ;-----	USE CHARACTER SUBROUTINE FOR POSITIONING
  4282                              <1> ;-----	ADDRESS RETURNED IS MULTIPLIED BY 2 FROM CORRECT VALUE
  4283                              <1> 
  4284 00002501 E8BA050000          <1> 	call	GRAPH_POSN
  4285                              <1> 	;movzx	edi, ax			; SAVE RESULT AS DESTINATION ADDRESS
  4286                              <1> 	; 03/08/2022
  4287 00002506 89C7                <1> 	mov	edi, eax
  4288                              <1> 
  4289                              <1> ;-----	DETERMINE SIZE OF WINDOW
  4290                              <1> 
  4291 00002508 6629CA              <1> 	sub	dx, cx
  4292 0000250B 6681C20101          <1>         add     dx, 101h                ; ADJUST VALUES
  4293 00002510 C0E602              <1> 	sal	dh, 2			; MULTIPLY ROWS BY 4 AT 8 VERT DOTS/CHAR
  4294                              <1> 					; AND EVEN/ODD ROWS
  4295                              <1> ;-----	DETERMINE CRT MODE
  4296                              <1> 
  4297 00002513 803D[1E670000]06    <1> 	cmp	byte [CRT_MODE], 6	; TEST FOR MEDIUM RES
  4298 0000251A 7304                <1>         jnc	short _R7_              ; FIND_SOURCE
  4299                              <1> 
  4300                              <1> ;-----	MEDIUM RES UP
  4301 0000251C D0E2                <1> 	sal	dl, 1			; # COLUMNS * 2, SINCE 2 BYTES/CHAR
  4302                              <1> 	;sal	di, 1			; OFFSET *2 SINCE 2 BYTES/CHAR
  4303                              <1> 	; 03/08/2022
  4304 0000251E D1E7                <1> 	sal	edi, 1
  4305                              <1> 
  4306                              <1> ;-----	DETERMINE THE SOURCE ADDRESS IN THE BUFFER
  4307                              <1> _R7_:                                   ; FIND_SOURCE
  4308 00002520 81C700800B00        <1> 	add	edi, 0B8000h
  4309 00002526 C0E702              <1> 	sal	bh, 2			; multiply number of lines by 4
  4310 00002529 7430                <1>         jz	short _R11              ; IF ZERO, THEN BLANK ENTIRE FIELD
  4311 0000252B B050                <1> 	mov	al, 80			; 80 BYTES/ROW
  4312 0000252D F6E7                <1> 	mul	bh			; determine offset to source
  4313                              <1> 	;movzx	esi, ax			; offset to source
  4314                              <1> 	; 03/08/2022
  4315 0000252F 89C6                <1> 	mov	esi, eax
  4316 00002531 01FE                <1> 	add	esi, edi		; SET UP SOURCE
  4317 00002533 88F4                <1> 	mov	ah, dh			; NUMBER OF ROWS IN FIELD
  4318 00002535 28FC                <1> 	sub	ah, bh			; determine number to move
  4319                              <1> 
  4320                              <1> ;-----	LOOP THROUGH, MOVING ONE ROW AT A TIME, BOTH EVEN AND ODD FIELDS
  4321                              <1> _R8:                                    ; ROW_LOOP
  4322 00002537 E8FD030000          <1>         call    _R17                    ; MOVE ONE ROW
  4323 0000253C 6681EEB01F          <1> 	sub	si, 2000h-80		; MOVE TO NEXT ROW
  4324 00002541 6681EFB01F          <1> 	sub	di, 2000h-80
  4325 00002546 FECC                <1> 	dec	ah			; NUMBER OF ROWS TO MOVE
  4326 00002548 75ED                <1>         jnz     short _R8               ; CONTINUE TILL ALL MOVED
  4327                              <1> 
  4328                              <1> ;-----	FILL IN THE VACATED LINE(S)
  4329                              <1> _R9:                                    ; CLEAR ENTRY
  4330 0000254A 88D8                <1> 	mov	al, bl			; attribute to fill with
  4331                              <1> _R10_:
  4332 0000254C E804040000          <1>         call    _R18                    ; CLEAR THAT ROW
  4333 00002551 6681EFB01F          <1> 	sub	di, 2000h-80		; POINT TO NEXT LINE
  4334 00002556 FECF                <1> 	dec	bh			; number of lines to fill
  4335 00002558 75F2                <1> 	jnz	short _R10_             ; CLEAR LOOP
  4336 0000255A C3                  <1> 	retn				; EVERYYHING DONE
  4337                              <1> 
  4338                              <1> _R11:                                   ; BLANK_FIELD
  4339 0000255B 88F7                <1> 	mov	bh, dh			; set blank count to everything in field
  4340 0000255D EBEB                <1>         jmp     short _R9               ; CLEAR THE FIELD
  4341                              <1> 
  4342                              <1> vga_graphics_up:
  4343                              <1> 	; 03/08/2022 - TRDOS 386 Kertnel v2.0.5
  4344                              <1> 	; 12/04/2021
  4345                              <1> 	; 08/08/2016
  4346                              <1> 	; 07/08/2016
  4347                              <1> 	; 04/08/2016
  4348                              <1> 	; 01/08/2016
  4349                              <1> 	; 31/07/2016
  4350                              <1> 	; 07/07/2016 - TRDOS 386 (TRDOS v2.0)
  4351                              <1> 	;
  4352                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  4353                              <1> 	; vgabios-0.7a (2011)
  4354                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  4355                              <1> 	; 'vgabios.c', 'biosfn_scroll'
  4356                              <1> 	;
  4357                              <1> 
  4358                              <1> 	; cl = upper left column
  4359                              <1> 	; ch = upper left row
  4360                              <1> 	; dl = lower rigth column
  4361                              <1> 	; dh = lower right row
  4362                              <1> 	;
  4363                              <1> 	; al = line count (AL=0 means blank entire fields)
  4364                              <1> 	; bl = fill value for blanked lines	
  4365                              <1> 	; bh = unused
  4366                              <1> 	;
  4367                              <1> 	; ah = [CRT_MODE], current video mode	
  4368                              <1> 
  4369 0000255F 88C7                <1> 	mov	bh, al ; 31/07/2016
  4370 00002561 BE[42670000]        <1> 	mov	esi, vga_g_modes
  4371 00002566 89F7                <1> 	mov	edi, esi
  4372 00002568 83C708              <1> 	add	edi, vga_g_mode_count
  4373                              <1> vga_g_up_0:
  4374 0000256B AC                  <1> 	lodsb
  4375 0000256C 38E0                <1> 	cmp	al, ah ; [CRT_MODE]
  4376 0000256E 7405                <1> 	je	short vga_g_up_1
  4377 00002570 39FE                <1> 	cmp	esi, edi
  4378 00002572 72F7                <1> 	jb	short vga_g_up_0
  4379                              <1> 	;xor	bh, bh ; 31/07/2016)
  4380 00002574 C3                  <1> 	retn	; nothing to do
  4381                              <1> vga_g_up_1:
  4382 00002575 88F8                <1> 	mov	al, bh ; 31/07/2016
  4383 00002577 83C64F              <1> 	add	esi, vga_g_memmodel - (vga_g_modes + 1)  
  4384                              <1> 	; [ESI] = VGA memory model number (LINEAR8, PLANAR4, PLANAR1)
  4385                              <1> 	
  4386                              <1> 	; if(rlr>=nbrows)rlr=nbrows-1;
  4387                              <1>  	; if(clr>=nbcols)clr=nbcols-1;
  4388                              <1>  	; if(nblines>nbrows)nblines=0;
  4389                              <1>  	; cols=clr-cul+1;
  4390                              <1> 
  4391 0000257A 3A35[26670000]      <1> 	cmp	dh, [VGA_ROWS]
  4392 00002580 7208                <1> 	jb	short vga_g_up_2
  4393 00002582 8A35[26670000]      <1> 	mov	dh, [VGA_ROWS]
  4394 00002588 FECE                <1> 	dec	dh
  4395                              <1> vga_g_up_2:
  4396 0000258A 3A15[20670000]      <1> 	cmp	dl, [CRT_COLS]  ; = [VGA_COLS]
  4397 00002590 7208                <1> 	jb	short vga_g_up_3
  4398 00002592 8A15[20670000]      <1> 	mov	dl, [CRT_COLS]
  4399 00002598 FECA                <1> 	dec	dl
  4400                              <1> vga_g_up_3:	
  4401 0000259A 3A05[26670000]      <1> 	cmp	al, [VGA_ROWS]
  4402 000025A0 7602                <1> 	jna	short vga_g_up_4
  4403 000025A2 28C0                <1> 	sub	al, al ; 0
  4404                              <1> vga_g_up_4:
  4405 000025A4 88D7                <1> 	mov	bh, dl ; clr
  4406 000025A6 28CF                <1> 	sub	bh, cl ; cul
  4407 000025A8 FEC7                <1> 	inc	bh ; cols = clr-cul+1
  4408                              <1> 
  4409 000025AA 20C0                <1> 	and	al, al ; nblines = 0
  4410 000025AC 7559                <1> 	jnz	short vga_g_up_6
  4411 000025AE 20ED                <1> 	and	ch, ch ; rul = 0
  4412 000025B0 7555                <1> 	jnz	short vga_g_up_6
  4413 000025B2 20C9                <1> 	and	cl, cl ; cul = 0
  4414 000025B4 7551                <1> 	jnz	short vga_g_up_6
  4415                              <1> 
  4416                              <1> 	;push	ax
  4417                              <1> 	; 12/04/2021
  4418 000025B6 50                  <1> 	push	eax
  4419 000025B7 A0[26670000]        <1> 	mov	al, [VGA_ROWS]
  4420 000025BC FEC8                <1> 	dec	al  
  4421 000025BE 38C6                <1> 	cmp	dh, al ; rlr = nbrows-1
  4422 000025C0 7545                <1> 	jne	short vga_g_up_5
  4423 000025C2 A0[20670000]        <1>         mov     al, [CRT_COLS]  ; = VGA_COLS
  4424 000025C7 FEC8                <1> 	dec	al 
  4425 000025C9 38C2                <1>  	cmp	dl, al ; clr = nbcols-1
  4426                              <1> 	;jne	short vga_g_up_5
  4427                              <1> 	;;pop	ax
  4428                              <1> 	; 12/04/2021
  4429 000025CB 58                  <1> 	pop	eax
  4430 000025CC 7539                <1> 	jne	short vga_g_up_5
  4431                              <1> 
  4432 000025CE 66B80502            <1> 	mov	ax, 0205h
  4433 000025D2 66BACE03            <1> 	mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  4434 000025D6 66EF                <1> 	out	dx, ax
  4435 000025D8 A0[26670000]        <1> 	mov	al, [VGA_ROWS]
  4436 000025DD 8A25[20670000]      <1> 	mov	ah, [CRT_COLS] ; = [VGA_COLS]
  4437 000025E3 F6E4                <1> 	mul	ah
  4438 000025E5 0FB7D0              <1> 	movzx	edx, ax
  4439                              <1> 	; 08/08/2016
  4440 000025E8 0FB605[22670000]    <1> 	movzx	eax, byte [CHAR_HEIGHT]
  4441 000025EF F7E2                <1> 	mul	edx
  4442                              <1> 	; eax = byte count	
  4443 000025F1 89C1                <1> 	mov	ecx, eax
  4444                              <1> 	;; 07/08/2016
  4445                              <1> 	;shl	dx, 3 ; * 8 ; * [CHAR_HEIGHT]
  4446                              <1> 	;mov	ecx, edx
  4447 000025F3 88D8                <1> 	mov	al, bl ; fill value for blanked lines
  4448 000025F5 BF00000A00          <1> 	mov	edi, 0A0000h
  4449 000025FA F3AA                <1> 	rep	stosb		
  4450                              <1> 	
  4451                              <1> 	;mov	ax, 5
  4452                              <1> 	; 03/08/2022
  4453 000025FC 30E4                <1> 	xor	ah, ah
  4454 000025FE B005                <1> 	mov	al, 5
  4455                              <1> 
  4456 00002600 66BACE03            <1> 	mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  4457 00002604 66EF                <1> 	out	dx, ax ; 0005h	
  4458                              <1> 
  4459 00002606 C3                  <1> 	retn
  4460                              <1> 
  4461                              <1> vga_g_up_5:
  4462                              <1> 	;;pop	ax
  4463                              <1> 	; 12/04/2021
  4464                              <1> 	;pop	eax
  4465                              <1> 
  4466                              <1> vga_g_up_6:
  4467                              <1> 	; [ESI] = VGA memory model number for current video mode
  4468                              <1>         ;
  4469                              <1>         ; LINEAR8 equ 5
  4470                              <1>         ; PLANAR4 equ 4
  4471                              <1>         ; PLANAR1 equ 3
  4472                              <1> 
  4473 00002607 803E04              <1> 	cmp	byte [esi], PLANAR4
  4474 0000260A 7424                <1> 	je	short vga_g_up_planar
  4475 0000260C 803E03              <1> 	cmp	byte [esi], PLANAR1
  4476 0000260F 741F                <1> 	je	short vga_g_up_planar
  4477                              <1> vga_g_up_linear8:
  4478                              <1> 	; 07/07/2016 (TEMPORARY)
  4479                              <1> 	;
  4480                              <1> 	; cl = upper left column ; cul
  4481                              <1> 	; ch = upper left row ; rul
  4482                              <1> 	; dl = lower rigth column ; clr
  4483                              <1> 	; dh = lower right row ; rlr
  4484                              <1> 
  4485                              <1> vga_g_up_l0:
  4486                              <1>  	;{for(i=rul;i<=rlr;i++)
  4487                              <1>   	; if((i+nblines>rlr)||(nblines==0))
  4488 00002611 08C0                <1> 	or	al, al
  4489 00002613 7414                <1> 	jz	short vga_g_up_l2
  4490 00002615 88C4                <1> 	mov	ah, al
  4491 00002617 00EC                <1> 	add	ah, ch ; i+nblines
  4492                              <1> 	;jc	short vga_g_up_l2	
  4493 00002619 38F4                <1> 	cmp	ah, dh
  4494 0000261B 770C                <1> 	ja	short vga_g_up_l2
  4495                              <1> 	; else
  4496                              <1> 	;  vgamem_copy_pl4(cul,i+nblines,i,cols,nbcols,cheight);
  4497 0000261D E8F2000000          <1> 	call	vgamem_copy_l8
  4498                              <1> vga_g_up_l1:
  4499 00002622 FEC5                <1> 	inc	ch
  4500 00002624 38F5                <1> 	cmp	ch, dh
  4501 00002626 76E9                <1> 	jna	short vga_g_up_l0
  4502 00002628 C3                  <1> 	retn
  4503                              <1> vga_g_up_l2:
  4504                              <1> 	; vgamem_fill_pl4(cul,i,cols,nbcols,cheight,attr);
  4505 00002629 E84C010000          <1> 	call	vgamem_fill_l8
  4506 0000262E EBF2                <1> 	jmp	short vga_g_up_l1
  4507                              <1> 
  4508                              <1> vga_g_up_planar:
  4509                              <1> 	; cl = upper left column ; cul
  4510                              <1> 	; ch = upper left row ; rul
  4511                              <1> 	; dl = lower rigth column ; clr
  4512                              <1> 	; dh = lower right row ; rlr
  4513                              <1> vga_g_up_pl0:
  4514                              <1>  	;{for(i=rul;i<=rlr;i++)
  4515                              <1>   	; if((i+nblines>rlr)||(nblines==0))
  4516 00002630 20C0                <1> 	and	al, al
  4517 00002632 7414                <1> 	jz	short vga_g_up_pl2	
  4518 00002634 88C4                <1> 	mov	ah, al
  4519 00002636 00EC                <1> 	add	ah, ch ; i+nblines
  4520                              <1> 	;jc	short vga_g_up_pl2
  4521 00002638 38F4                <1> 	cmp	ah, dh
  4522 0000263A 770C                <1> 	ja	short vga_g_up_pl2
  4523                              <1> 	; else
  4524                              <1> 	;  vgamem_copy_pl4(cul,i+nblines,i,cols,nbcols,cheight);
  4525 0000263C E80E000000          <1> 	call	vgamem_copy_pl4
  4526                              <1> vga_g_up_pl1:
  4527 00002641 FEC5                <1> 	inc	ch 
  4528 00002643 38F5                <1> 	cmp	ch, dh
  4529 00002645 76E9                <1> 	jna	short vga_g_up_pl0
  4530 00002647 C3                  <1> 	retn
  4531                              <1> vga_g_up_pl2:
  4532                              <1> 	; vgamem_fill_pl4(cul,i,cols,nbcols,cheight,attr);
  4533 00002648 E870000000          <1> 	call	vgamem_fill_pl4
  4534 0000264D EBF2                <1> 	jmp	short vga_g_up_pl1
  4535                              <1> 
  4536                              <1> vgamem_copy_pl4:
  4537                              <1> 	; 08/08/2016
  4538                              <1> 	; 07/08/2016
  4539                              <1> 	; 07/07/2016 - TRDOS 386 (TRDOS v2.0)
  4540                              <1> 	;
  4541                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  4542                              <1> 	; vgabios-0.7a (2011)
  4543                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  4544                              <1> 	; 'vgabios.c', 'vgamem_copy_pl4'
  4545                              <1> 	;
  4546                              <1> 	; vgamem_copy_pl4(xstart,ysrc,ydest,cols,nbcols,cheight)
  4547                              <1> 	; cl = xstart, ah = ysrc (i+nblines), ch = ydest (i),
  4548                              <1> 	; bh = cols, [CRT_COLS] = nbcols, [CHAR_HEIGHT] = cheight
  4549                              <1> 
  4550                              <1> 	; src=ysrc*cheight*nbcols+xstart;
  4551                              <1> 	; dest=ydest*cheight*nbcols+xstart;
  4552                              <1> 
  4553 0000264F 52                  <1> 	push	edx
  4554 00002650 50                  <1> 	push	eax
  4555                              <1> 
  4556                              <1> 	; outw(VGAREG_GRDC_ADDRESS, 0x0105)
  4557 00002651 66B80501            <1> 	mov	ax, 0105h
  4558 00002655 66BACE03            <1> 	mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  4559 00002659 66EF                <1> 	out	dx, ax
  4560                              <1> 
  4561                              <1> 	; 07/08/2016
  4562                              <1>  	;mov     ah, [esp+1]
  4563                              <1> 	;movzx	edx, ah ; ysrc
  4564 0000265B 0FB6542401          <1> 	movzx	edx, byte [esp+1]
  4565                              <1> 	; 08/08/2016
  4566 00002660 0FB605[22670000]    <1> 	movzx	eax, byte [CHAR_HEIGHT]
  4567 00002667 8A25[20670000]      <1> 	mov	ah, [CRT_COLS] ; nbcols
  4568 0000266D F6E4                <1> 	mul	ah 
  4569                              <1> 	;; 07/08/2016
  4570                              <1> 	;movzx	eax, byte [CRT_COLS]
  4571                              <1> 	;shl	ax, 3 ; * 8 ; * [CHAR_HEIGHT]
  4572 0000266F 50                  <1> 	push	eax ; cheight * nbcols
  4573 00002670 F7E2                <1> 	mul	edx ; * ysrc
  4574                              <1> 	; eax = ysrc * cheight * nbcols
  4575                              <1> 	; edx = 0
  4576 00002672 88CA                <1> 	mov	dl, cl ; edx = xstart	
  4577 00002674 01D0                <1>  	add	eax, edx
  4578 00002676 89C6                <1> 	mov	esi, eax ; src
  4579 00002678 88EA                <1> 	mov	dl, ch ; ydest
  4580 0000267A 58                  <1> 	pop	eax ; cheight * nbcols
  4581 0000267B F7E2                <1> 	mul	edx
  4582                              <1> 	; eax = ydest * cheight * nbcols
  4583 0000267D 88CA                <1> 	mov	dl, cl ; edx = xstart	
  4584 0000267F 01D0                <1>  	add	eax, edx
  4585 00002681 89C7                <1> 	mov	edi, eax ; dest
  4586                              <1> 	; esi = src
  4587                              <1> 	; edi = dest
  4588                              <1> 	; for(i=0;i<cheight;i++)
  4589                              <1>   	; {
  4590                              <1>    	;  memcpyb(0xa000,dest+i*nbcols,0xa000,src+i*nbcols,cols);
  4591                              <1>   	; }
  4592 00002683 51                  <1> 	push	ecx
  4593 00002684 B900000A00          <1> 	mov	ecx, 0A0000h
  4594 00002689 01CE                <1> 	add	esi, ecx
  4595 0000268B 01CF                <1> 	add	edi, ecx
  4596                              <1> 	; 08/08/2016
  4597 0000268D 8A35[22670000]      <1> 	mov	dh, [CHAR_HEIGHT]
  4598                              <1> 	;; 07/08/2016
  4599                              <1> 	;mov	dh, 8 ; 07/08/2016
  4600 00002693 28D2                <1> 	sub	dl, dl ; i
  4601                              <1> vgamem_copy_pl4_0:
  4602 00002695 56                  <1> 	push	esi
  4603 00002696 57                  <1> 	push	edi
  4604 00002697 0FB605[20670000]    <1> 	movzx	eax, byte [CRT_COLS]
  4605 0000269E F6E2                <1> 	mul	dl
  4606                              <1> 	; eax = i * nbcols
  4607 000026A0 01C7                <1> 	add	edi, eax ; dest+i*nbcols
  4608 000026A2 01C6                <1> 	add	esi, eax
  4609 000026A4 0FB6CF              <1> 	movzx	ecx, bh ; cols
  4610 000026A7 F3A4                <1> 	rep	movsb
  4611 000026A9 5F                  <1> 	pop	edi
  4612 000026AA 5E                  <1> 	pop	esi
  4613 000026AB FECE                <1> 	dec	dh
  4614 000026AD 75E6                <1> 	jnz	short vgamem_copy_pl4_0
  4615                              <1> vgamem_copy_pl4_1:
  4616 000026AF 59                  <1> 	pop	ecx
  4617                              <1> 
  4618                              <1> 	; outw(VGAREG_GRDC_ADDRESS, 0x0005);
  4619 000026B0 66B80500            <1> 	mov	ax, 0005h
  4620 000026B4 66BACE03            <1> 	mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  4621 000026B8 66EF                <1> 	out	dx, ax
  4622                              <1> 
  4623 000026BA 58                  <1> 	pop	eax
  4624 000026BB 5A                  <1> 	pop	edx
  4625                              <1> 
  4626 000026BC C3                  <1> 	retn	
  4627                              <1> 
  4628                              <1> vgamem_fill_pl4:
  4629                              <1> 	; 08/08/2016
  4630                              <1> 	; 07/08/2016
  4631                              <1> 	; 04/08/2016
  4632                              <1> 	; 07/07/2016 - TRDOS 386 (TRDOS v2.0)
  4633                              <1> 	;
  4634                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  4635                              <1> 	; vgabios-0.7a (2011)
  4636                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  4637                              <1> 	; 'vgabios.c', 'vgamem_fill_pl4'
  4638                              <1> 	;
  4639                              <1> 	; vgamem_fill_pl4(xstart,ystart,cols,nbcols,cheight,attr)
  4640                              <1> 	; cl = xstart, edi = ch = ystart, bh = cols,
  4641                              <1> 	; [CRT_COLS] = nbcols, [CHAR_HEIGHT] = cheight, attr = 0
  4642                              <1> 
  4643                              <1> 	; dest=ystart*cheight*nbcols+xstart;
  4644 000026BD 52                  <1> 	push	edx
  4645 000026BE 50                  <1> 	push	eax
  4646                              <1> 
  4647                              <1> 	; outw(VGAREG_GRDC_ADDRESS, 0x0205)
  4648 000026BF 66B80502            <1> 	mov	ax, 0205h
  4649 000026C3 66BACE03            <1> 	mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  4650 000026C7 66EF                <1> 	out	dx, ax
  4651                              <1> 
  4652                              <1>       	; 08/08/2016
  4653 000026C9 0FB605[22670000]    <1> 	movzx   eax, byte [CHAR_HEIGHT]
  4654 000026D0 F6E5                <1> 	mul	ch
  4655                              <1> 	;; 07/08/2016
  4656                              <1> 	;movzx	eax, ch
  4657                              <1> 	;shl	ax, 3 ; * 8 ; * [CHAR_HEIGHT]
  4658 000026D2 0FB615[20670000]    <1> 	movzx	edx, byte [CRT_COLS] ; = [VGA_COLS]
  4659 000026D9 F7E2                <1> 	mul	edx
  4660                              <1> 	; edx  = 0
  4661 000026DB 88CA                <1> 	mov	dl, cl 
  4662 000026DD 01D0                <1> 	add	eax, edx
  4663 000026DF 89C7                <1> 	mov	edi, eax
  4664                              <1> 	; edi = dest
  4665                              <1> 	; for(i=0;i<cheight;i++)
  4666                              <1>   	; {
  4667                              <1>    	;  memsetb(0xa000,dest+i*nbcols,attr,cols);
  4668                              <1>   	; }
  4669 000026E1 81C700000A00        <1> 	add	edi, 0A0000h
  4670 000026E7 51                  <1> 	push	ecx
  4671                              <1> 	; 08/08/2016
  4672 000026E8 8A35[22670000]      <1> 	mov	dh, [CHAR_HEIGHT]
  4673                              <1> 	;; 07/08/2016
  4674                              <1> 	;mov	dh, 8 ; 07/08/2016
  4675 000026EE 28D2                <1> 	sub	dl, dl ; i
  4676                              <1> vgamem_fill_pl4_0:
  4677 000026F0 57                  <1> 	push	edi
  4678 000026F1 0FB605[20670000]    <1> 	movzx	eax, byte [CRT_COLS]
  4679 000026F8 F6E2                <1> 	mul	dl
  4680                              <1> 	; eax = i * nbcols
  4681 000026FA 01C7                <1> 	add	edi, eax ; dest+i*nbcols
  4682 000026FC 88D8                <1> 	mov	al, bl ; attr ; 04/08/2016
  4683 000026FE 0FB6CF              <1> 	movzx	ecx, bh ; cols
  4684 00002701 F3AA                <1>  	rep	stosb
  4685 00002703 5F                  <1> 	pop	edi
  4686 00002704 75EA                <1> 	jnz	short vgamem_fill_pl4_0
  4687                              <1> vgamem_fill_pl4_1:
  4688 00002706 59                  <1> 	pop	ecx
  4689                              <1> 
  4690                              <1> 	; outw(VGAREG_GRDC_ADDRESS, 0x0005);
  4691 00002707 66B80500            <1> 	mov	ax, 0005h
  4692 0000270B 66BACE03            <1> 	mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  4693 0000270F 66EF                <1> 	out	dx, ax
  4694                              <1> 
  4695 00002711 58                  <1> 	pop	eax
  4696 00002712 5A                  <1> 	pop	edx 
  4697                              <1> 	
  4698 00002713 C3                  <1> 	retn
  4699                              <1> 
  4700                              <1> vgamem_copy_l8:
  4701                              <1> 	; 02/08/2022 - TRDOS 386 Kernel v2.0.5
  4702                              <1> 	; 08/08/2016
  4703                              <1> 	; 07/08/2016
  4704                              <1> 	; 06/08/2016
  4705                              <1> 	; 07/07/2016 - TRDOS 386 (TRDOS v2.0)
  4706                              <1> 	;
  4707                              <1> 	; TEMPORARY
  4708                              <1> 	;
  4709                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  4710                              <1> 	; vgabios-0.7a (2011)
  4711                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  4712                              <1> 	; 'vgabios.c', 'vgamem_copy_pl4'
  4713                              <1> 	;
  4714                              <1> 	; vgamem_copy_pl4(xstart,ysrc,ydest,cols,nbcols,cheight)
  4715                              <1> 	; cl = xstart, ah = ysrc (i+nblines), ch = ydest (i),
  4716                              <1> 	; bh = cols, [CRT_COLS] = nbcols, [CHAR_HEIGHT] = cheight
  4717                              <1> 
  4718                              <1> 	; src=ysrc*cheight*nbcols+xstart;
  4719                              <1> 	; dest=ydest*cheight*nbcols+xstart;
  4720                              <1> 
  4721 00002714 52                  <1> 	push	edx
  4722 00002715 50                  <1> 	push	eax
  4723                              <1> 
  4724                              <1> 	; outw(VGAREG_GRDC_ADDRESS, 0x0105)
  4725                              <1> 	;mov	ax, 0105h
  4726                              <1> 	;mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  4727                              <1> 	;out	dx, ax
  4728                              <1> 
  4729                              <1> 	;mov	ah, [esp+1]
  4730                              <1> 
  4731 00002716 0FB6D4              <1> 	movzx	edx, ah ; ysrc
  4732                              <1> 	; 08/08/2016
  4733 00002719 0FB605[22670000]    <1> 	movzx	eax, byte [CHAR_HEIGHT]
  4734 00002720 8A25[20670000]      <1> 	mov	ah, [CRT_COLS] ; nbcols
  4735 00002726 F6E4                <1> 	mul	ah 
  4736                              <1> 	;; 07/08/2016
  4737                              <1> 	;movzx	eax, byte [CRT_COLS]
  4738                              <1> 	;shl	ax, 3 ; * 8 ; * [CHAR_HEIGHT]
  4739 00002728 50                  <1> 	push	eax ; cheight * nbcols
  4740 00002729 F7E2                <1> 	mul	edx ; * ysrc
  4741                              <1> 	; eax = ysrc * cheight * nbcols
  4742                              <1> 	; edx = 0
  4743 0000272B 88CA                <1> 	mov	dl, cl ; edx = xstart
  4744 0000272D 01D0                <1>  	add	eax, edx
  4745 0000272F 89C6                <1> 	mov	esi, eax ; src
  4746                              <1> 	;shl	si, 3 ; * 8 ; 06/08/2016
  4747                              <1> 	; 02/08/2022
  4748 00002731 C1E603              <1> 	shl	esi, 3
  4749 00002734 88EA                <1> 	mov	dl, ch ; ydest
  4750 00002736 58                  <1> 	pop	eax ; cheight * nbcols
  4751 00002737 F7E2                <1> 	mul	edx
  4752                              <1> 	; eax = ydest * cheight * nbcols
  4753 00002739 88CA                <1> 	mov	dl, cl ; edx = xstart	
  4754 0000273B 01D0                <1>  	add	eax, edx
  4755 0000273D 89C7                <1> 	mov	edi, eax ; dest
  4756                              <1> 	;shl	di, 3 ; * 8 ; 06/08/2016
  4757                              <1> 	; 02/08/2022
  4758 0000273F C1E703              <1> 	shl	edi, 3
  4759                              <1> 	; esi = src
  4760                              <1> 	; edi = dest
  4761                              <1> 	; for(i=0;i<cheight;i++)
  4762                              <1>   	; {
  4763                              <1>    	;  memcpyb(0xa000,dest+i*nbcols,0xa000,src+i*nbcols,cols);
  4764                              <1>   	; }
  4765 00002742 51                  <1> 	push	ecx
  4766 00002743 B900000A00          <1> 	mov	ecx, 0A0000h
  4767 00002748 01CE                <1> 	add	esi, ecx
  4768 0000274A 01CF                <1> 	add	edi, ecx
  4769                              <1> 	; 08/08/2016
  4770 0000274C 8A35[22670000]      <1> 	mov	dh, [CHAR_HEIGHT]
  4771                              <1> 	;; 07/08/2016
  4772                              <1> 	;mov	dh, 8 ; 07/08/2016
  4773 00002752 28D2                <1> 	sub	dl, dl ; i
  4774                              <1> vgamem_copy_l8_0:
  4775 00002754 56                  <1> 	push	esi
  4776 00002755 57                  <1> 	push	edi
  4777 00002756 0FB605[20670000]    <1> 	movzx	eax, byte [CRT_COLS]
  4778 0000275D F6E2                <1> 	mul	dl
  4779                              <1> 	; eax = i * nbcols
  4780                              <1> 	;shl	ax, 3 ; * 8 ; 06/08/2016
  4781                              <1> 	; 02/08/2022
  4782 0000275F C1E003              <1> 	shl	eax, 3
  4783 00002762 01C7                <1> 	add	edi, eax ; dest+i*nbcols
  4784 00002764 01C6                <1> 	add	esi, eax
  4785 00002766 0FB6CF              <1> 	movzx	ecx, bh ; cols
  4786                              <1> 	;shl	cx, 3 ; * 8 ; 06/08/2016
  4787                              <1> 	; 02/08/2022
  4788 00002769 C1E103              <1> 	shl	ecx, 3
  4789 0000276C F3A4                <1> 	rep	movsb
  4790 0000276E 5F                  <1> 	pop	edi
  4791 0000276F 5E                  <1> 	pop	esi
  4792 00002770 FEC2                <1> 	inc	dl ; 06/08/2016
  4793 00002772 FECE                <1> 	dec	dh
  4794 00002774 75DE                <1> 	jnz	short vgamem_copy_l8_0
  4795                              <1> vgamem_copy_l8_1:
  4796 00002776 59                  <1> 	pop	ecx
  4797                              <1> 
  4798                              <1> 	;; outw(VGAREG_GRDC_ADDRESS, 0x0005);
  4799                              <1> 	;mov	ax, 0005h
  4800                              <1> 	;mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  4801                              <1> 	;out	dx, ax
  4802                              <1> 
  4803 00002777 58                  <1> 	pop	eax
  4804 00002778 5A                  <1> 	pop	edx
  4805                              <1> 
  4806 00002779 C3                  <1> 	retn
  4807                              <1> 
  4808                              <1> vgamem_fill_l8:
  4809                              <1> 	; 02/08/2022 - TRDOS 386 Kernel v2.0.5
  4810                              <1> 	; 08/08/2016
  4811                              <1> 	; 07/08/2016
  4812                              <1> 	; 06/08/2016
  4813                              <1> 	; 04/08/2016
  4814                              <1> 	; 07/07/2016 - TRDOS 386 (TRDOS v2.0)
  4815                              <1> 	;
  4816                              <1> 	; TEMPORARY
  4817                              <1> 	;
  4818                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  4819                              <1> 	; vgabios-0.7a (2011)
  4820                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  4821                              <1> 	; 'vgabios.c', 'vgamem_fill_pl4'
  4822                              <1> 	;
  4823                              <1> 	; vgamem_fill_pl4(xstart,ystart,cols,nbcols,cheight,attr)
  4824                              <1> 	; cl = xstart, edi = ch = ystart, bh = cols,
  4825                              <1> 	; [CRT_COLS] = nbcols, [CHAR_HEIGHT] = cheight, attr = 0
  4826                              <1> 
  4827                              <1> 	; dest=ystart*cheight*nbcols+xstart;
  4828 0000277A 52                  <1> 	push	edx
  4829 0000277B 50                  <1> 	push	eax
  4830                              <1> 
  4831                              <1> 	;; outw(VGAREG_GRDC_ADDRESS, 0x0205)
  4832                              <1> 	;mov	ax, 0205h
  4833                              <1> 	;mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  4834                              <1> 	;out	dx, ax
  4835                              <1> 
  4836                              <1>         ; 08/08/2016
  4837 0000277C 0FB605[22670000]    <1> 	movzx   eax, byte [CHAR_HEIGHT]
  4838 00002783 F6E5                <1> 	mul	ch
  4839                              <1> 	;; 07/08/2016
  4840                              <1> 	;movzx	eax, ch
  4841                              <1> 	;shl	ax, 3 ; * 8 ; * [CHAR_HEIGHT]
  4842 00002785 0FB615[20670000]    <1> 	movzx	edx, byte [CRT_COLS] ; = [VGA_COLS]
  4843 0000278C F7E2                <1> 	mul	edx
  4844                              <1> 	; edx  = 0
  4845 0000278E 88CA                <1> 	mov	dl, cl 
  4846 00002790 01D0                <1> 	add	eax, edx
  4847 00002792 89C7                <1> 	mov	edi, eax
  4848                              <1> 	;shl	di, 3 ; * 8 ; 06/08/2016
  4849                              <1> 	; 02/08/2022
  4850 00002794 C1E703              <1> 	shl	edi, 3
  4851                              <1> 	; edi = dest
  4852                              <1> 	; for(i=0;i<cheight;i++)
  4853                              <1>   	; {
  4854                              <1>    	;  memsetb(0xa000,dest+i*nbcols,attr,cols);
  4855                              <1>   	; }
  4856 00002797 81C700000A00        <1> 	add	edi, 0A0000h
  4857 0000279D 51                  <1> 	push	ecx
  4858                              <1> 	; 08/08/2016
  4859 0000279E 8A35[22670000]      <1> 	mov	dh, [CHAR_HEIGHT]
  4860                              <1> 	;; 07/08/2016
  4861                              <1> 	;mov	dh, 8 ; 07/08/2016
  4862 000027A4 28D2                <1> 	sub	dl, dl ; i
  4863                              <1> vgamem_fill_l8_0:
  4864 000027A6 57                  <1> 	push	edi
  4865 000027A7 0FB605[20670000]    <1> 	movzx	eax, byte [CRT_COLS]
  4866 000027AE F6E2                <1> 	mul	dl
  4867                              <1> 	; eax = i * nbcols
  4868                              <1> 	;shl	ax, 3 ; * 8 ; 06/08/2016
  4869                              <1> 	; 02/08/2022
  4870 000027B0 C1E003              <1> 	shl	eax, 3
  4871 000027B3 01C7                <1> 	add	edi, eax ; dest+i*nbcols
  4872 000027B5 88D8                <1> 	mov	al, bl ; attr ; 04/08/2016
  4873 000027B7 0FB6CF              <1> 	movzx	ecx, bh ; cols
  4874                              <1> 	;shl	cx, 3 ; * 8 ; 06/08/2016
  4875                              <1>  	; 02/08/2022
  4876 000027BA C1E103              <1> 	shl	ecx, 3
  4877 000027BD F3AA                <1> 	rep	stosb
  4878 000027BF 5F                  <1> 	pop	edi
  4879 000027C0 FEC2                <1> 	inc	dl ; 06/08/2016
  4880 000027C2 FECE                <1> 	dec	dh
  4881 000027C4 75E0                <1> 	jnz	short vgamem_fill_l8_0
  4882                              <1> vgamem_fill_l8_1:
  4883 000027C6 59                  <1> 	pop	ecx
  4884                              <1> 
  4885                              <1> 	;; outw(VGAREG_GRDC_ADDRESS, 0x0005);
  4886                              <1> 	;mov	ax, 0005h
  4887                              <1> 	;mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  4888                              <1> 	;out	dx, ax
  4889                              <1> 
  4890 000027C7 58                  <1> 	pop	eax
  4891 000027C8 5A                  <1> 	pop	edx 
  4892                              <1> 
  4893 000027C9 C3                  <1> 	retn
  4894                              <1> 
  4895                              <1> ; 03/08/2022 - TRDOS 386 Kernel V2.0.5
  4896                              <1> ; 07/07/2016
  4897                              <1> ; 27/06/2016 - TRDOS 386 (TRDOS v2.0)
  4898                              <1> ; VIDEO1.ASM - 24/03/1985 (IBM PC-AT BIOS source code)
  4899                              <1> ;------------------------------------------------------
  4900                              <1> ; SCROLL DOWN
  4901                              <1> ;  THIS ROUTINE SCROLLS DOWN THE INFORMATION ON THE CRT
  4902                              <1> ; ENTRY --
  4903                              <1> ;  CH,CL = UPPER LEFT CORNER OF REGION TO SCROLL
  4904                              <1> ;  DH,DL = LOWER RIGHT CORNER OF REGION TO SCROLL
  4905                              <1> ;   BOTH OF THE ABOVE ARE IN CHARACTER POSITIONS
  4906                              <1> ;  BH = FILL VALUE FOR BLANKED LINES
  4907                              <1> ;  AL = # LINES TO SCROLL (AL=0 MEANS BLANK THE ENTIRE FIELD)
  4908                              <1> ;  DS = DATA SEGMENT
  4909                              <1> ;  ES = REGEN SEGMENT
  4910                              <1> ; EXIT --
  4911                              <1> ;  NOTHING, THE SCREEN IS SCROLLED
  4912                              <1> ;--------------------------------------------------------
  4913                              <1> 
  4914                              <1> 	; cl = upper left column
  4915                              <1> 	; ch = upper left row
  4916                              <1> 	; dl = lower rigth column
  4917                              <1> 	; dh = lower right row
  4918                              <1> 	;
  4919                              <1> 	; al = line count (AL=0 means blank entire fields)
  4920                              <1> 	; bl = fill value for blanked lines	
  4921                              <1> 	; bh = unused
  4922                              <1> 
  4923                              <1> GRAPHICS_DOWN:
  4924                              <1> 	; 07/07/2016
  4925                              <1> 	; ah = Current video mode, [CRT_MODE]
  4926                              <1> 	; std				; SET DIRECTION
  4927 000027CA 80FC07              <1> 	cmp	ah, 7
  4928 000027CD 7769                <1>         ja	short vga_graphics_down ; 03/08/2022
  4929                              <1> 	;je	_n0
  4930                              <1> 
  4931 000027CF 88C7                <1> 	mov	bh, al			; save line count in BH
  4932                              <1> 	;mov	ax, dx			; GET LOWER RIGHT POSITION INTO AX REG
  4933                              <1> 	; 03/08/2022
  4934 000027D1 89D0                <1> 	mov	eax, edx
  4935                              <1> 
  4936                              <1> ;-----	USE CHARACTER SUBROUTINE FOR POSITIONING
  4937                              <1> ;-----	ADDRESS RETURNED IS MULTIPLIED BY 2 FROM CORRECT VALUE
  4938                              <1> 
  4939 000027D3 E8E8020000          <1> 	call	GRAPH_POSN
  4940                              <1> 	;movzx	edi, ax			; SAVE RESULT AS DESTINATION ADDRESS
  4941                              <1> 	; 03/08/2022
  4942 000027D8 89C7                <1> 	mov	edi, eax
  4943                              <1> 
  4944                              <1> ;-----	DETERMINE SIZE OF WINDOW
  4945                              <1> 
  4946 000027DA 6629CA              <1> 	sub	dx, cx
  4947 000027DD 6681C20101          <1>         add     dx, 101h                ; ADJUST VALUES
  4948 000027E2 C0E602              <1> 	sal	dh, 2			; MULTIPLY ROWS BY 4 AT 8 VERT DOTS/CHAR
  4949                              <1> 					; AND EVEN/ODD ROWS
  4950                              <1> ;-----	DETERMINE CRT MODE
  4951                              <1> 
  4952 000027E5 803D[1E670000]06    <1> 	cmp	byte [CRT_MODE], 6	; TEST FOR MEDIUM RES
  4953 000027EC 7305                <1> 	jnc	short _R12              ; FIND_SOURCE_DOWN
  4954                              <1> 
  4955                              <1> ;-----	MEDIUM RES DOWN
  4956 000027EE D0E2                <1> 	sal	dl, 1			; # COLUMNS * 2, SINCE 2 BYTES/CHAR
  4957                              <1> 	;sal	di, 1			; OFFSET *2 SINCE 2 BYTES/CHAR
  4958                              <1> 	; 03/08/2022
  4959 000027F0 D1E7                <1> 	sal	edi, 1
  4960                              <1> 	;inc	di			; POINT TO LAST BYTE
  4961                              <1> 	; 03/08/2022
  4962 000027F2 47                  <1> 	inc	edi
  4963                              <1> 
  4964                              <1> ;-----	DETERMINE THE SOURCE ADDRESS IN THE BUFFER
  4965                              <1> 
  4966                              <1> _R12:                                   ; FIND_SOURCE_DOWN
  4967 000027F3 81C700800B00        <1> 	add	edi, 0B8000h		
  4968 000027F9 6681C7F000          <1> 	add	di, 240			; POINT TO LAST ROW OF PIXELS
  4969 000027FE C0E702              <1> 	sal	bh, 2			; multiply number of lines by 4
  4970 00002801 74(06)              <1> 	jz	short 6			; IF ZERO, THEN BLANK ENTIRE FIELD
  4971 00002803 B050                <1> 	mov	al, 80			; 80 BYTES/ROW
  4972 00002805 F6E7                <1> 	mul	bh			; determine offset to source
  4973 00002807 89FE                <1> 	mov	esi, edi		; SET UP SOURCE
  4974                              <1> 	;sub	si, ax			; SUBTRACT THE OFFSET
  4975                              <1> 	; 03/08/2022
  4976 00002809 29C6                <1> 	sub	esi, eax
  4977 0000280B 88F4                <1> 	mov	ah, dh			; NUMBER OF ROWS IN FIELD
  4978 0000280D 28FC                <1> 	sub	ah, bh			; determine number to move
  4979                              <1> 
  4980                              <1> ;-----	LOOP THROUGH, MOVING ONE ROW AT A TIME, BOTH EVEN AND ODD FIELDS
  4981                              <1> 
  4982                              <1> _R13:                                   ; ROW_LOOP_DOWN
  4983 0000280F E825010000          <1>         call    _R17                    ; MOVE ONE ROW
  4984 00002814 6681EE5020          <1> 	sub	si, 2000h+80		; MOVE TO NEXT ROW
  4985 00002819 6681EF5020          <1> 	sub	di, 2000h+80
  4986 0000281E FECC                <1> 	dec	ah			; NUMBER OF ROWS TO MOVE
  4987 00002820 75ED                <1> 	jnz	short _R13              ; CONTINUE TILL ALL MOVED
  4988                              <1> 
  4989                              <1> ;-----	FILL IN THE VACATED LINE(S)
  4990                              <1> _R14:                                   ; CLEAR_ENTRY_DOWN
  4991 00002822 88D8                <1> 	mov	al, bl			; attribute to fill with
  4992                              <1> _R15_:                                  ; CLEAR_LOOP_DOWN
  4993 00002824 E82C010000          <1> 	call	_R18			; CLEAR A ROW
  4994 00002829 6681EF5020          <1> 	sub	di, 2000h+80		; POINT TO NEXT LINE
  4995 0000282E FECF                <1> 	dec	bh			; number of lines to fill
  4996 00002830 75F2                <1>         jnz	short _R15_             ; CLEAR_LOOP_DOWN
  4997                              <1> 	; 18/11/2020
  4998 00002832 FC                  <1> 	cld				; RESET THE DIRECTION FLAG
  4999                              <1> 	
  5000 00002833 C3                  <1> 	retn				; EVERYTHING DONE
  5001                              <1> 
  5002                              <1> _R16:                                   ; BLANK_FIELD_DOWN
  5003 00002834 88F7                <1> 	mov	bh, dh			; set blank count to everything in field
  5004 00002836 EBEA                <1>         jmp     short _R14              ; CLEAR THE FIELD
  5005                              <1> 
  5006                              <1> vga_graphics_down:
  5007                              <1> 	; 03/08/2022 - TRDOS 386 Kertnel v2.0.5
  5008                              <1> 	; 12/04/2021
  5009                              <1> 	; 08/08/2016
  5010                              <1> 	; 07/08/2016
  5011                              <1> 	; 31/07/2016
  5012                              <1> 	; 07/07/2016 - TRDOS 386 (TRDOS v2.0)
  5013                              <1> 	;
  5014                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  5015                              <1> 	; vgabios-0.7a (2011)
  5016                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  5017                              <1> 	; 'vgabios.c', 'biosfn_scroll'
  5018                              <1> 	;
  5019                              <1> 
  5020                              <1> 	; cl = upper left column
  5021                              <1> 	; ch = upper left row
  5022                              <1> 	; dl = lower rigth column
  5023                              <1> 	; dh = lower right row
  5024                              <1> 	;
  5025                              <1> 	; al = line count (AL=0 means blank entire fields)
  5026                              <1> 	; bl = fill value for blanked lines	
  5027                              <1> 	; bh = unused
  5028                              <1> 	;
  5029                              <1> 	; ah = [CRT_MODE], current video mode	
  5030                              <1> 
  5031 00002838 FC                  <1>         cld     ; !!! Clear direction flag !!! 
  5032                              <1> 
  5033 00002839 88C7                <1> 	mov	bh, al ; 31/07/2016
  5034                              <1> 
  5035 0000283B BE[3A670000]        <1> 	mov	esi, vga_modes
  5036 00002840 89F7                <1> 	mov	edi, esi
  5037 00002842 83C710              <1> 	add	edi, vga_mode_count
  5038                              <1> vga_g_down_0:
  5039 00002845 AC                  <1> 	lodsb
  5040 00002846 38E0                <1> 	cmp	al, ah ; [CRT_MODE]
  5041 00002848 7405                <1> 	je	short vga_g_down_1
  5042 0000284A 39FE                <1> 	cmp	esi, edi
  5043 0000284C 72F7                <1> 	jb	short vga_g_down_0
  5044                              <1> 	; xor 	bh, bh	; 31/07/2016
  5045 0000284E C3                  <1> 	retn	; nothing to do
  5046                              <1> vga_g_down_1:
  5047 0000284F 88F8                <1> 	mov	al, bh ; 31/07/2016
  5048 00002851 83C64F              <1> 	add	esi, vga_memmodel - (vga_modes + 1)  
  5049                              <1> 	; [ESI] = VGA memory model number (LINEAR8, PLANAR4, PLANAR1)
  5050                              <1> 	
  5051                              <1> 	; if(rlr>=nbrows)rlr=nbrows-1;
  5052                              <1>  	; if(clr>=nbcols)clr=nbcols-1;
  5053                              <1>  	; if(nblines>nbrows)nblines=0;
  5054                              <1>  	; cols=clr-cul+1;
  5055                              <1> 
  5056 00002854 3A35[26670000]      <1> 	cmp	dh, [VGA_ROWS]
  5057 0000285A 7208                <1> 	jb	short vga_g_down_2
  5058 0000285C 8A35[26670000]      <1> 	mov	dh, [VGA_ROWS]
  5059 00002862 FECE                <1> 	dec	dh
  5060                              <1> vga_g_down_2:
  5061 00002864 3A15[20670000]      <1> 	cmp	dl, [CRT_COLS]  ; = [VGA_COLS]
  5062 0000286A 7208                <1> 	jb	short vga_g_down_3
  5063 0000286C 8A15[20670000]      <1> 	mov	dl, [CRT_COLS]
  5064 00002872 FECA                <1> 	dec	dl
  5065                              <1> vga_g_down_3:	
  5066 00002874 3A05[26670000]      <1> 	cmp	al, [VGA_ROWS]
  5067 0000287A 7602                <1> 	jna	short vga_g_down_4
  5068 0000287C 28C0                <1> 	sub	al, al ; 0
  5069                              <1> vga_g_down_4:
  5070 0000287E 88F7                <1> 	mov	bh, dh ; clr
  5071 00002880 28CF                <1> 	sub	bh, cl ; cul
  5072 00002882 FEC7                <1> 	inc	bh ; cols = clr-cul+1
  5073                              <1> 
  5074 00002884 20C0                <1> 	and	al, al ; nblines = 0
  5075 00002886 7559                <1> 	jnz	short vga_g_down_6
  5076 00002888 20ED                <1> 	and	ch, ch ; rul = 0
  5077 0000288A 7555                <1> 	jnz	short vga_g_down_6
  5078 0000288C 20C9                <1> 	and	cl, cl ; cul = 0
  5079 0000288E 7551                <1> 	jnz	short vga_g_down_6
  5080                              <1> 
  5081 00002890 50                  <1> 	push	eax ; push ax ; 12/04/2021
  5082 00002891 A0[26670000]        <1> 	mov	al, [VGA_ROWS]
  5083 00002896 FEC8                <1> 	dec	al  
  5084 00002898 38C6                <1> 	cmp	dh, al ; rlr = nbrows-1
  5085 0000289A 7545                <1> 	jne	short vga_g_down_5
  5086 0000289C A0[20670000]        <1>         mov     al, [CRT_COLS]  ; = VGA_COLS
  5087 000028A1 FEC8                <1> 	dec	al 
  5088 000028A3 38C2                <1>  	cmp	dl, al ; clr = nbcols-1
  5089                              <1> 	;jne	short vga_g_down_5
  5090                              <1>  	; 12/04/2021
  5091 000028A5 58                  <1> 	pop	eax ; pop ax
  5092 000028A6 7539                <1> 	jne	short vga_g_down_5
  5093                              <1> 
  5094 000028A8 66B80502            <1> 	mov	ax, 0205h
  5095 000028AC 66BACE03            <1> 	mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  5096 000028B0 66EF                <1> 	out	dx, ax
  5097 000028B2 A0[26670000]        <1> 	mov	al, [VGA_ROWS]
  5098 000028B7 8A25[20670000]      <1> 	mov	ah, [CRT_COLS] ; = [VGA_COLS]
  5099 000028BD F6E4                <1> 	mul	ah
  5100 000028BF 0FB7D0              <1> 	movzx	edx, ax
  5101                              <1> 	; 08/08/2016
  5102 000028C2 0FB605[22670000]    <1> 	movzx	eax, byte [CHAR_HEIGHT]
  5103 000028C9 F7E2                <1> 	mul	edx
  5104                              <1> 	; eax = byte count	
  5105 000028CB 89C1                <1> 	mov	ecx, eax
  5106                              <1> 	;; 07/08/2016
  5107                              <1> 	;shl	dx, 3 ; * 8 ; * [CHAR_HEIGHT]
  5108                              <1> 	;mov	ecx, edx
  5109 000028CD 88D8                <1> 	mov	al, bl ; fill value for blanked lines
  5110 000028CF BF00000A00          <1> 	mov	edi, 0A0000h
  5111 000028D4 F3AA                <1> 	rep	stosb			
  5112                              <1> 	
  5113                              <1> 	; 03/08/2022
  5114 000028D6 30E4                <1> 	xor	ah, ah ; 0 
  5115                              <1> 	
  5116 000028D8 B005                <1> 	mov	al, 5
  5117 000028DA 66BACE03            <1> 	mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  5118 000028DE 66EF                <1> 	out	dx, ax ; 0005h	
  5119                              <1> 
  5120 000028E0 C3                  <1> 	retn
  5121                              <1> 
  5122                              <1> vga_g_down_5:
  5123                              <1> 	; 12/04/2021
  5124                              <1> 	;pop	eax  ; pop ax
  5125                              <1> 
  5126                              <1> vga_g_down_6:
  5127                              <1> 	; [ESI] = VGA memory model number for current video mode
  5128                              <1>         ;
  5129                              <1>         ; LINEAR8 equ 5
  5130                              <1>         ; PLANAR4 equ 4
  5131                              <1>         ; PLANAR1 equ 3
  5132                              <1> 
  5133 000028E1 803E04              <1> 	cmp	byte [esi], PLANAR4
  5134 000028E4 742C                <1> 	je	short vga_g_down_planar
  5135 000028E6 803E03              <1> 	cmp	byte [esi], PLANAR1
  5136 000028E9 7427                <1> 	je	short vga_g_down_planar
  5137                              <1> vga_g_down_linear8:
  5138                              <1> 	; 07/07/2016 (TEMPORARY)
  5139                              <1> 	;
  5140                              <1> 	; cl = upper left column ; cul
  5141                              <1> 	; ch = upper left row ; rul
  5142                              <1> 	; dl = lower rigth column ; clr
  5143                              <1> 	; dh = lower right row ; rlr
  5144                              <1> 
  5145                              <1> vga_g_down_l0:
  5146                              <1> 	;{for(i=rlr;i>=rul;i--)
  5147                              <1>         ; if((i<rul+nblines)||(nblines==0))
  5148 000028EB 08C0                <1> 	or	al, al
  5149 000028ED 741C                <1> 	jz	short vga_g_down_l2
  5150 000028EF 88C4                <1> 	mov	ah, al
  5151 000028F1 00EC                <1> 	add	ah, ch
  5152                              <1> 	;jc	short vga_g_down_l2	
  5153 000028F3 86EE                <1> 	xchg	ch, dh
  5154 000028F5 38E5                <1> 	cmp	ch, ah
  5155 000028F7 7212                <1> 	jb	short vga_g_down_l2
  5156 000028F9 88EC                <1> 	mov	ah, ch
  5157 000028FB 28C4                <1> 	sub	ah, al ; ah = i - nblines
  5158                              <1> 	; else
  5159                              <1> 	; vgamem_copy_pl4(cul,i,i-nblines,cols,nbcols,cheight);
  5160 000028FD E812FEFFFF          <1> 	call	vgamem_copy_l8
  5161                              <1> vga_g_down_l1:
  5162 00002902 86F5                <1> 	xchg	dh, ch
  5163 00002904 FECE                <1> 	dec	dh 
  5164 00002906 38EE                <1> 	cmp	dh, ch
  5165 00002908 73E1                <1> 	jnb	short vga_g_down_l0
  5166 0000290A C3                  <1> 	retn
  5167                              <1> 
  5168                              <1> vga_g_down_l2:
  5169                              <1> 	; vgamem_fill_pl4(cul,i,cols,nbcols,cheight,attr);
  5170 0000290B E86AFEFFFF          <1> 	call	vgamem_fill_l8
  5171 00002910 EBF0                <1> 	jmp	short vga_g_down_l1
  5172                              <1> 		 
  5173                              <1> vga_g_down_planar:
  5174                              <1> 	; cl = upper left column ; cul
  5175                              <1> 	; ch = upper left row ; rul
  5176                              <1> 	; dl = lower rigth column ; clr
  5177                              <1> 	; dh = lower right row ; rlr
  5178                              <1> vga_g_down_pl0:
  5179                              <1>  	;{for(i=rlr;i>=rul;i--)
  5180                              <1>         ; if((i<rul+nblines)||(nblines==0))
  5181 00002912 08C0                <1> 	or	al, al
  5182 00002914 741C                <1> 	jz	short vga_g_down_pl2
  5183 00002916 88C4                <1> 	mov	ah, al
  5184 00002918 00EC                <1> 	add	ah, ch
  5185                              <1> 	;jc	short vga_g_down_pl2	
  5186 0000291A 86EE                <1> 	xchg	ch, dh
  5187 0000291C 38E5                <1> 	cmp	ch, ah
  5188 0000291E 7212                <1> 	jb	short vga_g_down_pl2
  5189 00002920 88EC                <1> 	mov	ah, ch
  5190 00002922 28C4                <1> 	sub	ah, al ; ah = i - nblines
  5191                              <1> 	; else
  5192                              <1> 	; vgamem_copy_pl4(cul,i,i-nblines,cols,nbcols,cheight);
  5193 00002924 E826FDFFFF          <1> 	call	vgamem_copy_pl4
  5194                              <1> vga_g_down_pl1:
  5195 00002929 86F5                <1> 	xchg	dh, ch
  5196 0000292B FECE                <1> 	dec	dh 
  5197 0000292D 38EE                <1> 	cmp	dh, ch
  5198 0000292F 73E1                <1> 	jnb	short vga_g_down_pl0
  5199 00002931 C3                  <1> 	retn
  5200                              <1> 
  5201                              <1> vga_g_down_pl2:
  5202                              <1> 	; vgamem_fill_pl4(cul,i,cols,nbcols,cheight,attr);
  5203 00002932 E886FDFFFF          <1> 	call	vgamem_fill_pl4
  5204 00002937 EBF0                <1> 	jmp	short vga_g_down_pl1
  5205                              <1> 
  5206                              <1> 
  5207                              <1> 
  5208                              <1> ; 27/06/2016 - TRDOS 386 (TRDOS v2.0)
  5209                              <1> ; VIDEO1.ASM - 24/03/1985 (IBM PC-AT BIOS source code)
  5210                              <1> 
  5211                              <1> ;-----	ROUTINE TO MOVE ONE ROW OF INFORMATION
  5212                              <1> 
  5213                              <1> _R17:
  5214 00002939 0FB6CA              <1> 	movzx	ecx, dl			; NUMBER OF BYTES IN THE ROW
  5215 0000293C 56                  <1> 	push	esi
  5216 0000293D 57                  <1> 	push	edi			; SAVE POINTERS
  5217 0000293E F3A4                <1> 	rep	movsb			; MOVE THE EVEN FIELD
  5218 00002940 5F                  <1> 	pop	edi
  5219 00002941 5E                  <1> 	pop	esi
  5220 00002942 6681C60020          <1> 	add	si, 2000h
  5221 00002947 6681C70020          <1> 	add	di, 2000h		; POINT TO THE ODD FIELD
  5222 0000294C 56                  <1> 	push	esi
  5223 0000294D 57                  <1> 	push	edi			; SAVE THE POINTERS
  5224 0000294E 88D1                <1> 	mov	cl, dl			; COUNT BACK
  5225 00002950 F3A4                <1> 	rep	movsb			; MOVE THE ODD FIELD
  5226 00002952 5F                  <1> 	pop	edi
  5227 00002953 5E                  <1> 	pop	esi			; POINTERS BACK
  5228 00002954 C3                  <1> 	retn				; RETURN TO CALLER
  5229                              <1> 
  5230                              <1> ;-----	CLEAR A SINGLE ROW
  5231                              <1> 
  5232                              <1> _R18:
  5233 00002955 0FB6CA              <1> 	movzx	ecx, dl			; NUMBER OF BYTES IN FIELD
  5234 00002958 57                  <1> 	push	edi			; SAVE POINTER
  5235 00002959 F3AA                <1> 	rep	stosb			; STORE THE NEW VALUE
  5236 0000295B 5F                  <1> 	pop	edi			; POINTER BACK
  5237 0000295C 6681C70020          <1> 	add	di, 2000h		; POINT TO ODD FIELD
  5238 00002961 57                  <1> 	push	edi
  5239 00002962 88D1                <1> 	mov	cl, dl
  5240 00002964 F3AA                <1> 	rep	stosb			; FILL THE ODD FIELD
  5241 00002966 5F                  <1> 	pop	edi
  5242 00002967 C3                  <1> 	retn				; RETURN TO CALLER
  5243                              <1> 
  5244                              <1> ; 03/08/2022 - TRDOS 386 Kernel v2.0.5
  5245                              <1> ; 04/07/2016
  5246                              <1> ; 01/07/2016
  5247                              <1> ; 30/06/2016 - TRDOS 386 (TRDOS v2.0)
  5248                              <1> ; VIDEO1.ASM - 24/03/1985 (IBM PC-AT BIOS source code)
  5249                              <1> ;--------------------------------------------------
  5250                              <1> ; GRAPHICS WRITE
  5251                              <1> ;  THIS ROUTINE WRITES THE ASCII CHARACTER TO THE CURRENT
  5252                              <1> ;  POSITION ON THE SCREEN.
  5253                              <1> ; ENTRY --
  5254                              <1> ;  AL = CHARACTER TO WRITE
  5255                              <1> ;  BL = COLOR ATTRIBUTE TO BE USED FOR FOREGROUND COLOR
  5256                              <1> ;	IF BIT 7 IS SET, THE CHAR IS XOR'D INTO THE REGEN BUFFER
  5257                              <1> ;	(0 IS USED FOR THE BACKGROUND COLOR)
  5258                              <1> ;  CX = NUMBER OF CHARS TO WRITE
  5259                              <1> ;  DS = DATA SEGMENT
  5260                              <1> ;  ES = REGEN SEGMENT
  5261                              <1> ; EXIT --
  5262                              <1> ;  NOTHING IS RETURNED
  5263                              <1> ;
  5264                              <1> ; GRAPHICS READ
  5265                              <1> ;  THIS ROUTINE READS THE ASCII CHARACTER AT THE CURRENT CURSOR
  5266                              <1> ;  POSITION ON THE SCREEN BY MATCHING THE DOTS ON THE SCREEN TO THE
  5267                              <1> ;  CHARACTER GENERATOR CODE POINTS
  5268                              <1> ; ENTRY --
  5269                              <1> ;  NONE (0 IS ASSUMED AS THE BACKGROUND COLOR)
  5270                              <1> ; EXIT --
  5271                              <1> ;  AL = CHARACTER READ AT THAT POSITION (0 RETURNED IF NONE FOUND)
  5272                              <1> ;
  5273                              <1> ; FOR BOTH ROUTINES, THE IMAGES USED TO FORM CHARS ARE CONTAINED IN ROM
  5274                              <1> ;  FOR THE 1ST 128 CHARS.  TO ACCESS CHARS IN THE SECOND HALF, THE USER
  5275                              <1> ;  MUST INITIALIZE THE VECTOR AT INTERRUPT 1FH (LOCATION 0007CH) TO
  5276                              <1> ;  POINT TO THE USER SUPPLIED TABLE OF GRAPHIC IMAGES (8X8 BOXES).
  5277                              <1> ;  FAILURE TO DO SO WILL CAUSE IN STRANGE RESULTS
  5278                              <1> ;-----------------------------------------------------
  5279                              <1> 
  5280                              <1> GRAPHICS_WRITE:
  5281 00002968 25FF000000          <1> 	and 	eax, 0FFh		; ZERO TO HIGH OF CODE POINT
  5282 0000296D 50                  <1> 	push	eax			; SAVE CODE POINT VALUE
  5283                              <1> 
  5284                              <1> ;-----	DETERMINE POSITION IN REGEN BUFFER TO PUT CODE POINTS
  5285                              <1> 
  5286 0000296E E846010000          <1> 	call	S26			; FIND LOCATION IN REGEN BUFFER
  5287 00002973 89C7                <1> 	mov	edi, eax		; REGEN POINTER IN DI
  5288                              <1> 
  5289                              <1> ;-----	DETERMINE REGION TO GET CODE POINTS FROM
  5290                              <1> 
  5291 00002975 58                  <1> 	pop	eax			; RECOVER CODE POINT
  5292                              <1> 
  5293 00002976 BE[D84D0100]        <1> 	mov	esi, CRT_CHAR_GEN	; OFFSET OF IMAGES
  5294                              <1> 
  5295                              <1> ;-----	DETERMINE GRAPHICS MODE IN OPERATION
  5296                              <1> 					; DETERMINE_MODE
  5297                              <1> 	;sal	ax, 3			; MULTIPLY CODE POINT VALUE BY 8
  5298                              <1> 	; 03/08/2022
  5299 0000297B C1E003              <1> 	sal	eax, 3
  5300 0000297E 01C6                <1> 	add	esi, eax		; SI HAS OFFSET OF DESIRED CODES
  5301                              <1> 	
  5302 00002980 803D[1E670000]06    <1> 	cmp	byte [CRT_MODE], 6
  5303 00002987 7231                <1> 	jc	short S6		; TEST FOR MEDIUM RESOLUTION MODE
  5304                              <1> 
  5305                              <1> ;-----	HIGH RESOLUTION MODE
  5306                              <1> 
  5307 00002989 81C700800B00        <1> 	add	edi, 0B8000h
  5308                              <1> S1:					; HIGH_CHAR
  5309 0000298F 57                  <1> 	push	edi			; SAVE REGEN POINTER
  5310 00002990 56                  <1> 	push	esi			; SAVE CODE POINTER
  5311 00002991 B604                <1> 	mov	dh, 4			; NUMBER OF TIMES THROUGH LOOP
  5312                              <1> S2:
  5313 00002993 AC                  <1> 	lodsb				; GET BYTE FROM CODE POINTS
  5314 00002994 F6C380              <1> 	test	bl, 80h			; SHOULD WE USE THE FUNCTION
  5315 00002997 7515                <1> 	jnz	short S5		; TO PUT CHAR IN
  5316 00002999 AA                  <1> 	stosb				; STORE IN REGEN BUFFER
  5317 0000299A AC                  <1> 	lodsb
  5318                              <1> S4:
  5319 0000299B 8887FF1F0000        <1> 	mov	[edi+2000h-1], al	; STORE IN SECOND HALF
  5320 000029A1 83C74F              <1> 	add	edi, 79			; MOVE TO NEXT ROW IN REGEN
  5321 000029A4 FECE                <1> 	dec	dh			; DONE WITH LOOP
  5322 000029A6 75EB                <1> 	jnz	short S2
  5323 000029A8 5E                  <1> 	pop	esi
  5324 000029A9 5F                  <1> 	pop	edi			; RECOVER REGEN POINTER
  5325 000029AA 47                  <1> 	inc	edi			; POINT TO NEXT CHAR POSITION
  5326 000029AB E2E2                <1> 	loop	S1			; MORE CHARS TO WRITE
  5327 000029AD C3                  <1> 	retn
  5328                              <1> 
  5329                              <1> S5:
  5330 000029AE 3207                <1> 	xor	al, [edi]		; EXCLUSIVE OR WITH CURRENT
  5331 000029B0 AA                  <1> 	stosb				; STORE THE CODE POINT
  5332 000029B1 AC                  <1> 	lodsb				; AGAIN FOR ODD FIELD
  5333 000029B2 3287FF1F0000        <1> 	xor	al, [edi+2000h-1]
  5334 000029B8 EBE1                <1> 	jmp	short S4		; BACK TO MAINSTREAM
  5335                              <1> 
  5336                              <1> ;-----	MEDIUM RESOLUTION WRITE
  5337                              <1> S6:					; MED_RES_WRITE
  5338 000029BA 88DA                <1> 	mov	dl, bl			; SAVE HIGH COLOR BIT
  5339                              <1> 	; 03/08/2022
  5340 000029BC D1E7                <1> 	sal	edi, 1
  5341                              <1> 	;sal	di, 1			; OFFSET*2 SINCE 2 BYTES/CHAR
  5342                              <1> 					; EXPAND BL TO FULL WORD OF COLOR
  5343 000029BE 80E303              <1> 	and	bl, 3			; ISOLATE THE COLOR BITS ( LOW 2 BITS )
  5344 000029C1 B055                <1> 	mov	al, 055h		; GET BIT CONVERSION MULTIPLIER
  5345 000029C3 F6E3                <1> 	mul	bl			; EXPAND 2 COLOR BITS TO 4 REPLICATIONS
  5346 000029C5 88C3                <1> 	mov	bl, al			; PLACE BACK IN WORK REGISTER
  5347 000029C7 88C7                <1> 	mov	bh, al			; EXPAND TO 8 REPLICATIONS OF COLOR BITS
  5348 000029C9 81C700800B00        <1> 	add	edi, 0B8000h
  5349                              <1> S7:                                     ; MED_CHAR
  5350 000029CF 57                  <1> 	push	edi			; SAVE REGEN POINTER
  5351 000029D0 56                  <1> 	push	esi			; SAVE THE CODE POINTER
  5352 000029D1 B604                <1> 	mov	dh, 4			; NUMBER OF LOOPS
  5353                              <1> S8:
  5354 000029D3 AC                  <1> 	lodsb				; GET CODE POINT
  5355 000029D4 E8B1000000          <1> 	call	S21			; DOUBLE UP ALL THE BITS
  5356 000029D9 6621D8              <1> 	and	ax, bx			; CONVERT TO FOREGROUND COLOR ( 0 BACK )
  5357 000029DC 86E0                <1> 	xchg	ah, al			; SWAP HIGH/LOW BYTES FOR WORD MOVE
  5358 000029DE F6C280              <1> 	test	dl, 80h			; IS THIS XOR FUNCTION
  5359 000029E1 7403                <1> 	jz	short S9		; NO, STORE IT IN AS IS
  5360 000029E3 663307              <1> 	xor	ax, [edi]		; DO FUNCTION WITH LOW/HIGH
  5361                              <1> S9:
  5362 000029E6 668907              <1> 	mov	[edi], ax		; STORE FIRST BYTE HIGH, SECOND LOW
  5363 000029E9 AC                  <1> 	lodsb				; GET CODE POINT
  5364 000029EA E89B000000          <1> 	call	S21
  5365 000029EF 6621D8              <1> 	and	ax, bx			; CONVERT TO COLOR
  5366 000029F2 86E0                <1> 	xchg	ah, al			; SWAP HIGH/LOW BYTES FOR WORD MOVE
  5367 000029F4 F6C280              <1> 	test	dl, 80h			; AGAIN, IS THIS XOR FUNCTION
  5368 000029F7 7407                <1> 	jz	short _S10		; NO, JUST STORE THE VALUES
  5369 000029F9 66338700200000      <1> 	xor	ax, [edi+2000h]		; FUNCTION WITH FIRST HALF LOW
  5370                              <1> _S10:
  5371 00002A00 66898700200000      <1> 	mov	[edi+2000h], ax		; STORE SECOND PORTION HIGH
  5372 00002A07 6683C750            <1> 	add	di, 80			; POINT TO NEXT LOCATION
  5373 00002A0B FECE                <1> 	dec	dh
  5374 00002A0D 75C4                <1> 	jnz	short S8		; KEEP GOING
  5375 00002A0F 5E                  <1> 	pop	esi			; RECOVER CODE POINTER
  5376 00002A10 5F                  <1> 	pop	edi			; RECOVER REGEN POINTER
  5377 00002A11 47                  <1> 	inc	edi			; POINT TO NEXT CHAR POSITION
  5378 00002A12 47                  <1> 	inc	edi
  5379 00002A13 E2BA                <1> 	loop	S7			; MORE TO WRITE
  5380 00002A15 C3                  <1> 	retn
  5381                              <1> 
  5382                              <1> ; 03/08/2022 - TRDOS 386 Kernel v2.0.5
  5383                              <1> ; 04/07/2016
  5384                              <1> ; 01/07/2016
  5385                              <1> ; 30/06/2016 - TRDOS 386 (TRDOS v2.0)
  5386                              <1> ; VIDEO1.ASM - 24/03/1985 (IBM PC-AT BIOS source code)
  5387                              <1> ;----------------------------------------
  5388                              <1> ; GRAPHICS READ
  5389                              <1> ;----------------------------------------
  5390                              <1> GRAPHICS_READ:
  5391 00002A16 E89E000000          <1> 	call	S26			; CONVERTED TO OFFSET IN REGEN
  5392 00002A1B 89C6                <1> 	mov	esi, eax		; SAVE IN SI
  5393 00002A1D 81C600800B00        <1> 	add	esi, 0B8000h		; 01/07/2016
  5394 00002A23 83EC08              <1> 	sub	esp, 8			; ALLOCATE SPACE FOR THE READ CODE POINT
  5395 00002A26 89E5                <1> 	mov	ebp, esp		; POINTER TO SAVE AREA
  5396                              <1> 
  5397                              <1> ;-----	DETERMINE GRAPHICS MODES
  5398 00002A28 B604                <1> 	mov	dh, 4			; number of passes ; 01/07/2016
  5399 00002A2A 803D[1E670000]06    <1> 	cmp	byte [CRT_MODE], 6
  5400 00002A31 7219                <1> 	jc	short S12		; MEDIUM RESOLUTION
  5401                              <1> 
  5402                              <1> ;-----	HIGH RESOLUTION READ
  5403                              <1> ;-----	GET VALUES FROM REGEN BUFFER AND CONVERT TO CODE POINT
  5404                              <1> 	;mov	dh,4			; NUMBER OF PASSES
  5405                              <1> S11:
  5406 00002A33 8A06                <1> 	mov	al, [esi] 		; GET FIRST BYTE
  5407 00002A35 884500              <1> 	mov	[ebp], al 		; SAVE IN STORAGE AREA
  5408 00002A38 45                  <1> 	inc	ebp			; NEXT LOCATION
  5409 00002A39 8A8600200000        <1> 	mov	al, [esi+2000h]		; GET LOWER REGION BYTE
  5410 00002A3F 884500              <1> 	mov	[ebp], al 		; ADJUST AND STORE
  5411 00002A42 45                  <1> 	inc	ebp
  5412 00002A43 83C650              <1> 	add	esi, 80			; POINTER INTO REGEN
  5413 00002A46 FECE                <1> 	dec	dh			; LOOP CONTROL
  5414 00002A48 75E9                <1> 	jnz	short S11		; DO IT SOME MORE
  5415 00002A4A EB1C                <1> 	jmp	short S14		; GO MATCH THE SAVED CODE POINTS
  5416                              <1> 
  5417                              <1> ;-----	MEDIUM RESOLUTION READ
  5418                              <1> S12:	
  5419                              <1> 	;sal	si, 1			; OFFSET*2 SINCE 2 BYTES/CHAR
  5420                              <1> 	; 03/08/2022
  5421 00002A4C D1E6                <1> 	sal	esi, 1
  5422                              <1> 	;mov	dh, 4			; NUMBER OF PASSES
  5423                              <1> S13:
  5424 00002A4E E84B000000          <1> 	call	S23			; GET BYTES FROM REGEN INTO SINGLE SAVE
  5425 00002A53 81C6FE1F0000        <1> 	add	esi, 2000h-2		; GO TO LOWER REGION
  5426 00002A59 E840000000          <1> 	call	S23			; GET THIS PAIR INTO SAVE
  5427 00002A5E 81EEB21F0000        <1> 	sub	esi, 2000h-80+2		; ADJUST POINTER BACK INTO UPPER
  5428 00002A64 FECE                <1> 	dec	dh
  5429 00002A66 75E6                <1> 	jnz	short S13		; KEEP GOING UNTIL ALL 8 DONE
  5430                              <1> 
  5431                              <1> ;-----	SAVE AREA HAS CHARACTER IN IT, MATCH IT
  5432                              <1> S14:					; FIND_CHAR
  5433 00002A68 BF[D84D0100]        <1> 	mov	edi, CRT_CHAR_GEN	; ESTABLISH ADDRESSING
  5434 00002A6D 83ED08              <1> 	sub	ebp, 8			; ADJUST POINTER TO START OF SAVE AREA
  5435 00002A70 89EE                <1> 	mov	esi, ebp
  5436                              <1> S15:
  5437                              <1> 	;mov	ax, 256			; NUMBER TO TEST AGAINST
  5438                              <1> 	; 03/08/2022
  5439 00002A72 29C0                <1> 	sub	eax, eax
  5440 00002A74 FEC4                <1> 	inc	ah
  5441                              <1> 	; eax = 256
  5442                              <1> S16:
  5443 00002A76 56                  <1> 	push	esi			; SAVE SAVE AREA POINTER
  5444 00002A77 57                  <1> 	push	edi			; SAVE CODE POINTER
  5445                              <1> 	;mov	ecx, 4			; NUMBER OF WORDS TO MATCH
  5446                              <1> 	;repe	cmpsw			; COMPARE THE 8 BYTES AS WORDS
  5447 00002A78 A7                  <1> 	cmpsd				; compare first 4 bytes 
  5448 00002A79 7501                <1> 	jne	short S17		; 
  5449 00002A7B A7                  <1> 	cmpsd				; compare last 4 bytes
  5450                              <1> S17:
  5451 00002A7C 5F                  <1> 	pop	edi			; RECOVER THE POINTERS
  5452 00002A7D 5E                  <1> 	pop	esi
  5453                              <1> 	;jz	short S18		; IF ZERO FLAG SET, THEN MATCH OCCURRED
  5454 00002A7E 7406                <1> 	je	short S18
  5455                              <1> 	;				; NO MATCH, MOVE ON TO NEXT
  5456 00002A80 83C708              <1> 	add	edi, 8			; NEXT CODE POINT
  5457                              <1> 	;dec	ax			; LOOP CONTROL
  5458                              <1> 	; 03/08/2022
  5459 00002A83 48                  <1> 	dec	eax
  5460 00002A84 75F0                <1> 	jnz	short S16		; DO ALL OF THEM
  5461                              <1> 
  5462                              <1> ;-----	CHARACTER IS FOUND ( AL=0 IF NOT FOUND )
  5463                              <1> S18:	
  5464 00002A86 83C408              <1> 	add	esp, 8			; READJUST THE STACK, THROW AWAY SAVE
  5465 00002A89 C3                  <1> 	retn				; ALL DONE
  5466                              <1> 
  5467                              <1> ; 12/04/2021
  5468                              <1> ; 30/06/2016 - TRDOS 386 (TRDOS v2.0)
  5469                              <1> ; VIDEO1.ASM - 24/03/1985 (IBM PC-AT BIOS source code)
  5470                              <1> ;--------------------------------------------
  5471                              <1> ; EXPAND BYTE
  5472                              <1> ;  THIS ROUTINE TAKES THE BYTE IN AL AND DOUBLES ALL
  5473                              <1> ;  OF THE BITS, TURNING THE 8 BITS INTO 16 BITS.
  5474                              <1> ;  THE RESULT IS LEFT IN AX
  5475                              <1> ;--------------------------------------------
  5476                              <1> S21:
  5477                              <1> 	; 03/08/2022
  5478                              <1> 	;push	cx			; SAVE REGISTER
  5479                              <1> 	; 12/04/2021
  5480 00002A8A 51                  <1> 	push	ecx
  5481                              <1> 	;;mov	cx, 8			; SHIFT COUNT REGISTER FOR ONE BYTE
  5482                              <1> 	;mov	cl, 8
  5483 00002A8B B408                <1> 	mov	ah, 8
  5484                              <1> S22:
  5485 00002A8D D0C8                <1> 	ror	al, 1			; SHIFT BITS, LOW BIT INTO CARRY FLAG
  5486                              <1> 	;rcr	bp, 1			; MOVE CARRY FLAG (LOW BIT INTO RESULTS
  5487                              <1> 	;sar	bp, 1			; SIGN EXTEND HIGH BIT (DOUBLE IT)
  5488                              <1> 	; 03/08/2022
  5489 00002A8F 66D1D9              <1> 	rcr	cx, 1
  5490 00002A92 66D1F9              <1> 	sar	cx, 1
  5491                              <1> 
  5492                              <1> 	;;loop	S22			; REPEAT FOR ALL 8 BITS
  5493                              <1> 	;dec	cl
  5494                              <1> 	;jnz	short S22
  5495                              <1> 	;xchg	ax, bp			; MOVE RESULTS TO PARAMETER REGISTER
  5496                              <1> 	; 03/08/5022
  5497 00002A95 FECC                <1> 	dec	ah
  5498 00002A97 75F4                <1> 	jnz	short S22
  5499 00002A99 6689C8              <1> 	mov	ax, cx
  5500                              <1> 	;pop	cx			; RECOVER REGISTER
  5501                              <1> 	; 12/04/2021
  5502 00002A9C 59                  <1> 	pop	ecx
  5503 00002A9D C3                  <1> 	retn				; ALL DONE
  5504                              <1> 
  5505                              <1> ; 01/07/2016 - TRDOS 386 (TRDOS v2.0)
  5506                              <1> ; VIDEO1.ASM - 24/03/1985 (IBM PC-AT BIOS source code)
  5507                              <1> ;--------------------------------------------------
  5508                              <1> ; MED_READ_BYTE
  5509                              <1> ; THIS ROUTINE WILL TAKE 2 BYTES FROM THE REGEN BUFFER,
  5510                              <1> ;  COMPARE AGAINST THE CURRENT FOREGROUND COLOR, AND PLACE
  5511                              <1> ;  THE CORRESPONDING ON/OFF BIT PATTERN INTO THE CURRENT
  5512                              <1> ;  POSITION IN THE SAVE AREA
  5513                              <1> ; ENTRY --
  5514                              <1> ;  SI,DS = POINTER TO REGEN AREA OF INTEREST
  5515                              <1> ;  BX = EXPANDED FOREGROUND COLOR
  5516                              <1> ;  BP = POINTER TO SAVE AREA
  5517                              <1> ; EXIT --
  5518                              <1> ;  SI AND BP ARE INCREMENTED
  5519                              <1> ;----------------------------------------------------
  5520                              <1> S23:
  5521 00002A9E 66AD                <1> 	lodsw				; GET FIRST BYTE AND SECOND BYTES
  5522 00002AA0 86C4                <1> 	xchg	al, ah			; SWAP FOR COMPARE
  5523                              <1> 	;mov	cx, 0C000h		; 2 BIT MASK TO TEST THE ENTRIES
  5524                              <1> 	; 02/08/2022
  5525 00002AA2 29C9                <1> 	sub	ecx, ecx
  5526 00002AA4 B5C0                <1> 	mov	ch, 0C0h
  5527                              <1> 	; ecx = 0C000h
  5528                              <1> 	;mov	dl, 0			; RESULT REGISTER
  5529                              <1> 	; 03/08/2022
  5530 00002AA6 28D2                <1> 	sub	dl, dl
  5531                              <1> S24:
  5532                              <1> 	;test	ax, cx			; IS THIS SECTION BACKCROUND?
  5533                              <1>         ; 03/08/2022
  5534 00002AA8 85C8                <1> 	test	eax, ecx
  5535 00002AAA 7401                <1> 	jz	short S25               ; IF ZERO, IT IS BACKGROUND (CARRY=0)
  5536 00002AAC F9                  <1> 	stc				; WASN'T, SO SET CARRY
  5537                              <1> S25:
  5538 00002AAD D0D2                <1> 	rcl	dl, 1			; MOVE THAT BIT INTO THE RESULT
  5539                              <1> 	;shr	cx, 2			; MOVE THE MASK TO THE RIGHT BY 2 BITS
  5540                              <1> 	; 02/08/2022
  5541 00002AAF C1E902              <1> 	shr	ecx, 2
  5542 00002AB2 73F4                <1> 	jnc	short S24		; DO IT AGAIN IF MASK DIDN'T FALL OUT
  5543 00002AB4 885500              <1> 	mov	[ebp], dl 		; STORE RESULT IN SAVE AREA
  5544 00002AB7 45                  <1> 	inc	ebp			; ADJUST POINTER
  5545 00002AB8 C3                  <1> 	retn				; ALL DONE
  5546                              <1> 
  5547                              <1> ; 02/08/2022 - TRDOS 386 Kernel v2.0.5
  5548                              <1> ; 30/06/2016 - TRDOS 386 (TRDOS v2.0)
  5549                              <1> ; VIDEO1.ASM - 24/03/1985 (IBM PC-AT BIOS source code)
  5550                              <1> ;-----------------------------------------
  5551                              <1> ; V4_POSITION
  5552                              <1> ;  THIS ROUTINE TAKES THE CURSOR POSITION CONTAINED IN
  5553                              <1> ;  THE MEMORY LOCATION, AND CONVERTS IT INTO AN OFFSET
  5554                              <1> ;  INTO THE REGEN BUFFER, ASSUMING ONE BYTE/CHAR.
  5555                              <1> ;  FOR MEDIUM RESOLUTION GRAPHICS, THE NUMBER MUST
  5556                              <1> ;  BE DOUBLED.
  5557                              <1> ; ENTRY -- NO REGISTERS,MEMORY LOCATION @CURSOR_POSN IS USED
  5558                              <1> ; EXIT--
  5559                              <1> ;  AX CONTAINS OFFSET INTO REGEN BUFFER
  5560                              <1> ;-----------------------------------------
  5561                              <1> S26:
  5562 00002AB9 0FB705[66770100]    <1> 	movzx	eax, word [CURSOR_POSN]	; GET CURRENT CURSOR
  5563                              <1> GRAPH_POSN:
  5564 00002AC0 53                  <1> 	push	ebx			; SAVE REGISTER
  5565 00002AC1 0FB6D8              <1> 	movzx	ebx, al			; SAVE A COPY OF CURRENT CURSOR
  5566 00002AC4 A0[20670000]        <1> 	mov	al, [CRT_COLS]		; GET BYTES PER COLUMN
  5567 00002AC9 F6E4                <1> 	mul	ah			; MULTIPLY BY ROWS
  5568                              <1> 	;shl	ax, 2			; MULTIPLY * 4 SINCE 4 ROWS/BYTE
  5569                              <1> 	; 02/08/2022
  5570 00002ACB C1E002              <1> 	shl	eax, 2
  5571 00002ACE 01D8                <1> 	add	eax, ebx		; DETERMINE OFFSET
  5572 00002AD0 5B                  <1> 	pop	ebx			; RECOVER POINTER
  5573 00002AD1 C3                  <1> 	retn				; ALL DONE
  5574                              <1> 
  5575                              <1> ; 03/08/2022 - TRDOS 386 Kernel v2.0.5
  5576                              <1> ; 09/07/2016
  5577                              <1> ; 01/07/2016 - TRDOS 386 (TRDOS v2.0)
  5578                              <1> ; VIDEO1.ASM - 24/03/1985 (IBM PC-AT BIOS source code)
  5579                              <1> ;---------------------------------------------
  5580                              <1> ; SET_COLOR
  5581                              <1> ;	THIS ROUTINE WILL ESTABLISH THE BACKGROUND COLOR, THE OVERSCAN COLOR,
  5582                              <1> ;	AND THE FOREGROUND COLOR SET FOR MEDIUM RESOLUTION GRAPHICS
  5583                              <1> ; INPUT
  5584                              <1> ;	(BH) HAS COLOR ID
  5585                              <1> ;		IF BH=0, THE BACKGROUND COLOR VALUE IS SET
  5586                              <1> ;			FROM THE LOW BITS OF BL (0-31)
  5587                              <1> ;		IF BH=1, THE PALETTE SELECTION IS MADE
  5588                              <1> ;			BASED ON THE LOW BIT OF BL:
  5589                              <1> ;				0 = GREEN, RED, YELLOW FOR COLORS 1,2,3
  5590                              <1> ;				1 = BLUE, CYAN, MAGENTA FOR COLORS 1,2,3
  5591                              <1> ;	(BL) HAS THE COLOR VALUE TO BE USED
  5592                              <1> ; OUTPUT
  5593                              <1> ;	THE COLOR SELECTION IS UPDATED
  5594                              <1> ;----------------------------------------------
  5595                              <1> SET_COLOR:
  5596 00002AD2 803D[1E670000]07    <1>         cmp     byte [CRT_MODE], 7      ; 09/07/2016
  5597                              <1> 	;ja	VIDEO_RETURN		; nothing to do for VGA modes
  5598                              <1> 	; 03/08/2022
  5599 00002AD9 7605                <1> 	jna	short M21
  5600 00002ADB E92EF0FFFF          <1> 	jmp	VIDEO_RETURN
  5601                              <1> M21:
  5602                              <1> 	;mov	dx, [ADDR_6845]		; I/O PORT FOR PALETTE
  5603                              <1> 	;mov	dx, 3D4h
  5604                              <1> 	;add	dx, 5			; OVERSCAN PORT
  5605 00002AE0 66BAD903            <1> 	mov	dx, 3D9h
  5606 00002AE4 A0[21670000]        <1> 	mov	al, [CRT_PALETTE] 	; GET THE CURRENT PALETTE VALUE
  5607 00002AE9 08FF                <1> 	or	bh, bh			; IS THIS COLOR 0?
  5608 00002AEB 7512                <1> 	jnz	short M20		; OUTPUT COLOR 1
  5609                              <1> 
  5610                              <1> ;-----	HANDLE COLOR 0 BY SETTING THE BACKGROUND COLOR
  5611                              <1> 
  5612 00002AED 24E0                <1> 	and	al, 0E0h 		; TURN OFF LOW 5 BITS OF CURRENT
  5613 00002AEF 80E31F              <1> 	and	bl, 01Fh 		; TURN OFF HIGH 3 BITS OF INPUT VALUE
  5614 00002AF2 08D8                <1> 	or	al, bl			; PUT VALUE INTO REGISTER
  5615                              <1> M19:					; OUTPUT THE PALETTE
  5616 00002AF4 EE                  <1> 	out	dx, al			; OUTPUT COLOR SELECTION TO 3D9 PORT
  5617 00002AF5 A2[21670000]        <1> 	mov	[CRT_PALETTE], al 	; SAVE THE COLOR VALUE
  5618 00002AFA E90FF0FFFF          <1> 	jmp	VIDEO_RETURN
  5619                              <1> 
  5620                              <1> ;-----	HANDLE COLOR 1 BY SELECTING THE PALETTE TO BE USED
  5621                              <1> 
  5622                              <1> M20:
  5623 00002AFF 24DF                <1> 	and	al, 0DFH 		; TURN OFF PALETTE SELECT BIT
  5624 00002B01 D0EB                <1> 	shr	bl, 1			; TEST THE LOW ORDER BIT OF BL
  5625 00002B03 73EF                <1> 	jnc	short M19		; ALREADY DONE
  5626 00002B05 0C20                <1> 	or	al, 20H			; TURN ON PALETTE SELECT BIT
  5627 00002B07 EBEB                <1> 	jmp	short M19		; GO DO IT
  5628                              <1> 
  5629                              <1> ; 03/08/2022 - TRDOS 386 Kernel v2.0.5
  5630                              <1> ; 09/07/2016
  5631                              <1> ; 01/07/2016 - TRDOS 386 (TRDOS v2.0)
  5632                              <1> ; VIDEO1.ASM - 24/03/1985 (IBM PC-AT BIOS source code)
  5633                              <1> ;--------------------------------------------
  5634                              <1> ; READ DOT -- WRITE DOT
  5635                              <1> ; THESE ROUTINES WILL WRITE A DOT, OR READ THE
  5636                              <1> ;  DOT AT THE INDICATED LOCATION
  5637                              <1> ; ENTRY --
  5638                              <1> ;   DX = ROW (0-199)	(THE ACTUAL VALUE DEPENDS ON THE MODE)
  5639                              <1> ;   CX = COLUMN ( 0-639) ( THE VALUES ARE NOT RANGE CHECKED )
  5640                              <1> ;   AL = DOT VALUE TO WRITE (1,2 OR 4 BITS DEPENDING ON MODE,
  5641                              <1> ;	REQUIRED FOR WRITE DOT ONLY, RIGHT JUSTIFIED)
  5642                              <1> ;	BIT 7 OF AL = 1 INDICATES XOR THE VALUE INTO THE LOCATION
  5643                              <1> ;   DS = DATA SEGMENT
  5644                              <1> ;   ES = REGEN SEGMENT
  5645                              <1> ;
  5646                              <1> ; EXIT
  5647                              <1> ;	AL = DOT VALUE READ, RIGHT JUSTIFIED, READ ONLY
  5648                              <1> ;----------------------------------------------
  5649                              <1> 
  5650                              <1> READ_DOT:
  5651                              <1> 	; 09/07/2016
  5652 00002B09 8A25[1E670000]      <1> 	mov	ah,  [CRT_MODE]
  5653 00002B0F 80FC07              <1> 	cmp	ah, 7 ; 6!?
  5654 00002B12 760A                <1> 	jna	short read_dot_cga
  5655                              <1> 
  5656 00002B14 E8B3030000          <1> 	call	vga_read_pixel
  5657                              <1> 	; al = pixel value
  5658                              <1> read_dot_retn:	; 03/08/2022
  5659 00002B19 E9F5EFFFFF          <1> 	jmp	_video_return
  5660                              <1> 
  5661                              <1> read_dot_cga:
  5662                              <1> 	;je	VIDEO_RETURN ; 7	
  5663 00002B1E 80FC04              <1> 	cmp	ah, 4 ; graphics ? 
  5664                              <1> 	;jb	VIDEO_RETURN ; no, text mode, nothing to do
  5665                              <1> 	; 03/08/2022
  5666 00002B21 72F6                <1> 	jb	short read_dot_retn
  5667                              <1> 
  5668 00002B23 E84F000000          <1> 	call	R3			; DETERMINE BYTE POSITION OF DOT
  5669 00002B28 8A06                <1> 	mov	al, [esi]		; GET THE BYTE
  5670 00002B2A 20E0                <1> 	and	al, ah			; MASK OFF THE OTHER BITS IN THE BYTE
  5671 00002B2C D2E0                <1> 	shl	al, cl			; LEFT JUSTIFY THE VALUE
  5672 00002B2E 88F1                <1> 	mov	cl, dh			; GET NUMBER OF BITS IN RESULT
  5673 00002B30 D2C0                <1> 	rol	al, cl			; RIGHT JUSTIFY THE RESULT
  5674                              <1> 	;jmp	VIDEO_RETURN		; RETURN FROM VIDEO I/O
  5675 00002B32 0FB6C0              <1> 	movzx	eax, al
  5676 00002B35 E9D9EFFFFF          <1> 	jmp	_video_return
  5677                              <1> 
  5678                              <1> ; 03/08/2022
  5679                              <1> ; 02/08/2022 - TRDOS 386 Kernel v2.0.5
  5680                              <1> ; 12/04/2021
  5681                              <1> ; 09/07/2016
  5682                              <1> ; 01/07/2016 - TRDOS 386 (TRDOS v2.0)
  5683                              <1> ; VIDEO1.ASM - 24/03/1985 (IBM PC-AT BIOS source code)
  5684                              <1> 
  5685                              <1> WRITE_DOT:
  5686                              <1> 	; 09/07/2016
  5687 00002B3A 8A25[1E670000]      <1> 	mov	ah, [CRT_MODE]
  5688 00002B40 80FC07              <1> 	cmp	ah, 7 ; 6!?
  5689 00002B43 760A                <1> 	jna	short write_dot_cga
  5690                              <1> 	
  5691 00002B45 E8F2020000          <1> 	call	vga_write_pixel
  5692                              <1> write_dot_retn:	; 03/08/2022
  5693 00002B4A E9BFEFFFFF          <1> 	jmp	VIDEO_RETURN
  5694                              <1> 
  5695                              <1> write_dot_cga:
  5696                              <1> 	;je	VIDEO_RETURN ; 7	
  5697 00002B4F 80FC04              <1> 	cmp	ah, 4 ; graphics ? 
  5698                              <1> 	;jb	VIDEO_RETURN ; no, text mode, nothing to do
  5699                              <1> 	; 03/08/2022
  5700 00002B52 72F6                <1> 	jb	short write_dot_retn
  5701                              <1> 
  5702                              <1> 	;;push	ax			; SAVE DOT VALUE
  5703                              <1> 	;push	ax			; TWICE
  5704                              <1> 	; 12/04/2021
  5705 00002B54 50                  <1> 	push	eax
  5706 00002B55 E81D000000          <1> 	call	R3			; DETERMINE BYTE POSITION OF THE DOT
  5707 00002B5A D2E8                <1> 	shr	al, cl			; SHIFT TO SET UP THE BITS FOR OUTPUT
  5708 00002B5C 20E0                <1> 	and	al, ah			; STRIP OFF THE OTHER BITS
  5709 00002B5E 8A0E                <1> 	mov	cl, [esi]		; GET THE CURRENT BYTE
  5710                              <1> 	;pop	bx			; RECOVER XOR FLAG
  5711                              <1> 	; 12/04/2021
  5712 00002B60 5B                  <1> 	pop	ebx
  5713 00002B61 F6C380              <1> 	test	bl, 80h			; IS IT ON
  5714 00002B64 750D                <1> 	jnz	short R2		; YES, XOR THE DOT
  5715 00002B66 F6D4                <1> 	not	ah			; SET MASK TO REMOVE THE INDICATED BITS
  5716 00002B68 20E1                <1> 	and	cl, ah
  5717 00002B6A 08C8                <1> 	or	al, cl			; OR IN THE NEW VALUE OF THOSE BITS
  5718                              <1> R1:					; FINISH_DOT
  5719 00002B6C 8806                <1> 	mov	[esi], al		; RESTORE THE BYTE IN MEMORY
  5720                              <1> 	;;pop	AX
  5721 00002B6E E99BEFFFFF          <1> 	jmp	VIDEO_RETURN		; RETURN FROM VIDEO I/O
  5722                              <1> R2:					; XOR_DOT
  5723 00002B73 30C8                <1> 	xor	al, cl			; EXCLUSIVE OR THE DOTS
  5724 00002B75 EBF5                <1> 	jmp	short R1		; FINISH UP THE WRITING
  5725                              <1> 
  5726                              <1> ; 02/08/2022 - TRDOS 386 Kernel v2.0.5
  5727                              <1> ; 01/07/2016 - TRDOS 386 (TRDOS v2.0)
  5728                              <1> ; VIDEO1.ASM - 24/03/1985 (IBM PC-AT BIOS source code)
  5729                              <1> 
  5730                              <1> ;----------------------------------------------
  5731                              <1> ; THIS SUBROUTINE DETERMINES THE REGEN BYTE LOCATION OF THE
  5732                              <1> ; INDICATED ROW COLUMN VALUE IN GRAPHICS MODE.
  5733                              <1> ; ENTRY --
  5734                              <1> ;  DX = ROW VALUE (0-199)
  5735                              <1> ;  CX = COLUMN VALUE (0-639)
  5736                              <1> ; EXIT --
  5737                              <1> ;  SI = OFFSET INTO REGEN BUFFER FOR BYTE OF INTEREST
  5738                              <1> ;  AH = MASK TO STRIP OFF THE BITS OF INTEREST
  5739                              <1> ;  CL = BITS TO SHIFT TO RIGHT JUSTIFY THE MASK IN AH
  5740                              <1> ;  DH = # BITS IN RESULT
  5741                              <1> ;  BX = MODIFIED
  5742                              <1> ;-----------------------------------------------
  5743                              <1> R3:
  5744                              <1> 
  5745                              <1> ;-----	DETERMINE 1ST BYTE IN INDICATED ROW BY MULTIPLYING ROW VALUE BY 40
  5746                              <1> ;-----	 ( LOW BIT OF ROW DETERMINES EVEN/ODD, 80 BYTES/ROW )
  5747                              <1> 
  5748 00002B77 0FB7F0              <1> 	movzx	esi, ax			; WILL SAVE AL AND AH DURING OPERATION
  5749 00002B7A B028                <1> 	mov	al, 40
  5750 00002B7C F6E2                <1> 	mul	dl			; AX= ADDRESS OF START OF INDICATED ROW
  5751 00002B7E A808                <1> 	test	al, 08H 		; TEST FOR EVEN/ODD ROW CALCULATED
  5752 00002B80 7404                <1> 	JZ	short R4		; JUMP IF EVEN ROW
  5753 00002B82 6605D81F            <1> 	add	ax, 2000h-40		; OFFSET TO LOCATION OF ODD ROWS ADJUST
  5754                              <1> R4:					; EVEN_ROW
  5755                              <1> 	;xchg	si, ax			; MOVE POINTER TO (SI) AND RECOVER (AX)
  5756                              <1> 	; 02/08/2022
  5757 00002B86 96                  <1> 	xchg	esi, eax
  5758 00002B87 81C600800B00        <1> 	add	esi, 0B8000h
  5759                              <1> 	;mov	dx, cx			; COLUMN VALUE TO DX
  5760 00002B8D 0FB7D1              <1> 	movzx	edx, cx
  5761                              <1> 
  5762                              <1> ;-----	DETERMINE GRAPHICS MODE CURRENTLY IN EFFECT
  5763                              <1> 
  5764                              <1> ; SET UP THE REGISTERS ACCORDING TO THE MODE
  5765                              <1> ; CH = MASK FOR LOW OF COLUMN ADDRESS ( 7/3 FOR HIGH/MED RES )
  5766                              <1> ; CL = # OF ADDRESS BITS IN COLUMN VALUE ( 3/2 FOR H/M )
  5767                              <1> ; BL = MASK TO SELECT BITS FROM POINTED BYTE ( 80H/C0H FOR H/M )
  5768                              <1> ; BH = NUMBER OF VALID BITS IN POINTED BYTE ( 1/2 FOR H/M )
  5769                              <1> 
  5770 00002B90 66BBC002            <1> 	mov	bx, 2C0h
  5771 00002B94 66B90203            <1> 	mov	cx, 302h 		; SET PARMS FOR MED RES
  5772 00002B98 803D[1E670000]06    <1> 	cmp	byte [CRT_MODE], 6
  5773 00002B9F 7208                <1> 	jc	short R5		; HANDLE IF MED RES
  5774 00002BA1 66BB8001            <1> 	mov	bx, 180h
  5775 00002BA5 66B90307            <1> 	mov	cx, 703h 		; SET PARMS FOR HIGH RES
  5776                              <1> 
  5777                              <1> ;-----	DETERMINE BIT OFFSET IN BYTE FROM COLUMN MASK
  5778                              <1> R5:
  5779 00002BA9 20D5                <1> 	and	ch, dl			; ADDRESS OF PEL WITHIN BYTE TO CH
  5780                              <1> 
  5781                              <1> ;-----	DETERMINE BYTE OFFSET FOR THIS LOCATION IN COLUMN
  5782                              <1> 
  5783                              <1> 	;shr	dx, cl			; SHIFT BY CORRECT AMOUNT
  5784                              <1> 	;add	si, dx			; INCREMENT THE POINTER
  5785                              <1> 	; 02/08/2022
  5786 00002BAB D3EA                <1> 	shr	edx, cl
  5787 00002BAD 01D6                <1> 	add	esi, edx
  5788 00002BAF 88FE                <1> 	mov	dh, bh			; GET THE # OF BITS IN RESULT TO DH
  5789                              <1> 
  5790                              <1> ;-----	MULTIPLY BH (VALID BITS IN BYTE) BY CH (BIT OFFSET)
  5791                              <1> 
  5792 00002BB1 28C9                <1> 	sub	cl, cl			; ZERO INTO STORAGE LOCATION
  5793                              <1> R6:
  5794 00002BB3 D0C8                <1> 	ror	al, 1			; LEFT JUSTIFY VALUE IN AL (FOR WRITE)
  5795 00002BB5 00E9                <1> 	add	cl, ch			; ADD IN THE BIT OFFSET VALUE
  5796 00002BB7 FECF                <1> 	dec	bh			; LOOP CONTROL
  5797 00002BB9 75F8                <1> 	jnz	short R6		; ON EXIT, CL HAS COUNT TO RESTORE BITS
  5798 00002BBB 88DC                <1> 	mov	ah, bl			;  GET MASK TO AH
  5799 00002BBD D2EC                <1> 	shr	ah, cl			;  MOVE THE MASK TO CORRECT LOCATION
  5800 00002BBF C3                  <1> 	retn				;  RETURN WITH EVERYTHING SET UP
  5801                              <1> 
  5802                              <1> load_dac_palette:
  5803                              <1> 	; 02/08/2022 (TRDOS 386 Kernel v2.0.5)
  5804                              <1> 	; 29/07/2016
  5805                              <1> 	; 23/07/2016
  5806                              <1> 	; 03/07/2016 (TRDOS 386 = TRDOS v2.0)
  5807                              <1> 	; (set_mode_vga)
  5808                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  5809                              <1> 	; vgabios-0.7a (2011)
  5810                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  5811                              <1> 	; 'vgabios.c', 'load_dac_palette'
  5812                              <1> 	;
  5813                              <1> 	; Oracle VirtualBox 5.0.24 VGABios Source Code
  5814                              <1> 	; ('vgabios.c', 'vgatables.h', 'vgafonts.h', 'vgarom.asm')
  5815                              <1> 	;
  5816                              <1> 	; INPUT -> AH = DAC selection number (3, 2 or 1)
  5817                              <1> 	; OUTPUT -> ECX = 0, AX = 0
  5818                              <1> 	; (Modifed registers: EAX, ECX, EDX, ESI)
  5819                              <1> 	;
  5820 00002BC0 66BAC803            <1> 	mov	dx, 3C8h  ; VGAREG_DAC_WRITE_ADDRESS
  5821 00002BC4 28C0                <1> 	sub	al, al ; 0
  5822 00002BC6 EE                  <1> 	out	dx, al ; 0 ; color index, always 0 at the beginning
  5823                              <1> 	;inc	dx   ; 3C9h ; VGAREG_DAC_DATA
  5824                              <1> 	; 02/08/2022
  5825 00002BC7 FEC2                <1> 	inc	dl ; dx = 3C9h
  5826                              <1> 	;mov	ecx, 256   ; always 256*3 values
  5827                              <1> 	; 02/08/2022
  5828 00002BC9 31C9                <1> 	xor	ecx, ecx
  5829 00002BCB FEC5                <1> 	inc	ch	
  5830                              <1> 	; ecx = 256
  5831                              <1> 
  5832                              <1> 	;push	esi
  5833 00002BCD 88E0                <1> 	mov	al, ah
  5834 00002BCF B43F                <1> 	mov	ah, 3Fh	; 3Fh except DAC selection number 3
  5835 00002BD1 3C02                <1> 	cmp 	al, 2
  5836 00002BD3 7414                <1> 	je	short l_dac_p_2
  5837 00002BD5 7719                <1> 	ja	short l_dac_p_3
  5838 00002BD7 20C0                <1> 	and	al, al
  5839 00002BD9 7507                <1> 	jnz	short l_dac_p_1
  5840                              <1> l_dac_p_0:
  5841 00002BDB BE[98480100]        <1> 	mov	esi, palette0
  5842 00002BE0 EB15                <1> 	jmp	short l_dac_p_4	
  5843                              <1> l_dac_p_1:
  5844 00002BE2 BE[58490100]        <1> 	mov	esi, palette1
  5845 00002BE7 EB0E                <1> 	jmp	short l_dac_p_4
  5846                              <1> l_dac_p_2:
  5847 00002BE9 BE[184A0100]        <1> 	mov	esi, palette2
  5848 00002BEE EB07                <1> 	jmp	short l_dac_p_4
  5849                              <1> l_dac_p_3:
  5850 00002BF0 B4FF                <1> 	mov	ah, 0FFh ; dac registers
  5851 00002BF2 BE[D84A0100]        <1> 	mov	esi, palette3
  5852                              <1> l_dac_p_4:
  5853 00002BF7 AC                  <1> 	lodsb
  5854 00002BF8 EE                  <1> 	out	dx, al  ; Red
  5855 00002BF9 AC                  <1> 	lodsb
  5856 00002BFA EE                  <1> 	out	dx, al	; Green
  5857 00002BFB AC                  <1> 	lodsb
  5858 00002BFC EE                  <1> 	out	dx, al	; Blue
  5859 00002BFD 20E4                <1> 	and	ah, ah
  5860 00002BFF 7405                <1> 	jz	short l_dac_p_5	
  5861 00002C01 FECC                <1> 	dec	ah
  5862 00002C03 E2F2                <1> 	loop	l_dac_p_4
  5863                              <1> 	;pop	esi
  5864 00002C05 C3                  <1> 	retn
  5865                              <1> l_dac_p_5:
  5866                              <1> 	; 29/07/2016
  5867 00002C06 FEC9                <1> 	dec	cl
  5868 00002C08 7407                <1> 	jz	short l_dac_p_7
  5869                              <1> 	;
  5870 00002C0A 28C0                <1> 	sub	al, al ; 0
  5871                              <1> l_dac_p_6:
  5872 00002C0C EE                  <1> 	out	dx, al ; outb(VGAREG_DAC_DATA,0);
  5873 00002C0D EE                  <1> 	out	dx, al
  5874 00002C0E EE                  <1> 	out	dx, al
  5875 00002C0F E2FB                <1> 	loop	l_dac_p_6
  5876                              <1> l_dac_p_7:
  5877                              <1> 	;pop	esi
  5878 00002C11 C3                  <1> 	retn
  5879                              <1> 
  5880                              <1> gray_scale_summing:
  5881                              <1> 	; 03/08/2022 (TRDOS 386 v2.0.5)
  5882                              <1> 	; 12/04/2021
  5883                              <1> 	; 03/07/2016 (TRDOS 386 = TRDOS v2.0)
  5884                              <1> 	; (set_mode_vga)
  5885                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  5886                              <1> 	; vgabios-0.7a (2011)
  5887                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  5888                              <1> 	; 'vgabios.c', 'biosfn_perform_gray_scale_summing'
  5889                              <1> 	;
  5890                              <1> 	; Oracle VirtualBox 5.0.24 VGABios Source Code
  5891                              <1> 	; ('vgabios.c', 'vgatables.h', 'vgafonts.h', 'vgarom.asm')
  5892                              <1> 	;
  5893                              <1> 
  5894                              <1> 	; INPUT -> EBX = Start address (color index <= 255)
  5895                              <1> 	;	   ECX = Count (<= 256)
  5896                              <1> 	; OUTPUT -> (E)CX = 0
  5897                              <1> 	; (Modifed registers: EAX, ECX, EDX, EBX)
  5898                              <1> 
  5899 00002C12 66BADA03            <1> 	mov	dx, 3DAh ; VGAREG_ACTL_RESET
  5900 00002C16 EC                  <1> 	in	al, dx
  5901 00002C17 30C0                <1> 	xor	al, al ; 0
  5902                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  5903                              <1> 	; 03/08/2022
  5904 00002C19 B2C0                <1> 	mov	dl, 0C0h
  5905 00002C1B EE                  <1> 	out	dx, al	; clear bit 5
  5906                              <1> 			; (while loading palette registers)
  5907                              <1> 	; set read address and switch to read mode
  5908                              <1> g_s_s_1:
  5909                              <1> 	;mov	dx, 3C7h ; VGAREG_DAC_READ_ADDRESS
  5910                              <1> 	; 03/08/2022
  5911 00002C1C B2C7                <1> 	mov	dl, 0C7h
  5912 00002C1E 88D8                <1> 	mov	al, bl
  5913 00002C20 EE                  <1> 	out	dx, al
  5914                              <1> 	; get 6-bit wide RGB data values
  5915                              <1>  	; intensity = (0.3*Red)+(0.59*Green)+(0.11*Blue)
  5916                              <1> 	; i = ( ( 77*r + 151*g + 28*b ) + 0x80 ) >> 8;
  5917                              <1> 	;mov	dx, 3C9h ; VGAREG_DAC_DATA
  5918                              <1> 	; 03/08/2022
  5919 00002C21 B2C9                <1> 	mov	dl, 0C9h
  5920 00002C23 EC                  <1> 	in	al, dx ; red
  5921 00002C24 B44D                <1> 	mov	ah, 77 ; 0.3* Red
  5922 00002C26 F6E4                <1> 	mul	ah
  5923                              <1> 	;push	ax
  5924                              <1> 	; 12/04/2021
  5925 00002C28 50                  <1> 	push	eax
  5926 00002C29 EC                  <1> 	in	al, dx ; green
  5927 00002C2A B497                <1> 	mov	ah, 151  ; 0.59 * Green
  5928 00002C2C F6E4                <1> 	mul	ah
  5929                              <1> 	;push	ax
  5930                              <1> 	; 12/04/2021
  5931 00002C2E 50                  <1> 	push	eax
  5932 00002C2F EC                  <1> 	in	al, dx ; blue
  5933 00002C30 B41C                <1> 	mov	ah, 28 ; 0.11 * Blue
  5934 00002C32 F6E4                <1> 	mul	ah
  5935                              <1> 	;pop	dx
  5936                              <1> 	; 12/04/2021
  5937 00002C34 5A                  <1> 	pop	edx
  5938 00002C35 6601D0              <1> 	add	ax, dx
  5939                              <1> 	;pop	dx
  5940                              <1> 	; 12/04/2021
  5941 00002C38 5A                  <1> 	pop	edx
  5942 00002C39 6601D0              <1> 	add	ax, dx
  5943 00002C3C 66058000            <1> 	add	ax, 80h  
  5944 00002C40 B03F                <1> 	mov	al, 3Fh
  5945 00002C42 38C4                <1> 	cmp	ah, al	; if(i>0x3f)i=0x3f
  5946 00002C44 7602                <1> 	jna	short g_s_s_2
  5947 00002C46 88C4                <1> 	mov	ah, al
  5948                              <1> g_s_s_2:
  5949                              <1> 	;mov	dx, 3C8h  ; VGAREG_DAC_WRITE_ADDRESS
  5950                              <1> 	; 03/08/2022
  5951 00002C48 B2C8                <1> 	mov	dl, 0C8h
  5952 00002C4A 88D8                <1> 	mov	al, bl ; color index
  5953 00002C4C EE                  <1> 	out	dx, al
  5954 00002C4D 88E0                <1> 	mov	al, ah ; intensity
  5955                              <1> 	;inc	dx ; 3C9h ; VGAREG_DAC_DATA
  5956                              <1> 	; 03/08/2022
  5957 00002C4F FEC2                <1> 	inc	dl
  5958 00002C51 EE                  <1> 	out	dx, al ; R (R=G=B)
  5959 00002C52 88E0                <1> 	mov	al, ah ; intensity
  5960 00002C54 EE                  <1> 	out	dx, al ; G (R=G=B)
  5961 00002C55 88E0                <1>  	mov	al, ah ; intensity
  5962 00002C57 EE                  <1> 	out	dx, al ; B (R=G=B)
  5963                              <1> 	;dec	cx
  5964                              <1> 	; 03/08/2022
  5965 00002C58 49                  <1> 	dec	ecx
  5966 00002C59 7404                <1> 	jz	short g_s_s_3
  5967 00002C5B FEC3                <1> 	inc	bl    ; next color index value
  5968 00002C5D EBBD                <1> 	jmp	short g_s_s_1
  5969                              <1> g_s_s_3:
  5970                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
  5971                              <1> 	; 03/08/2022
  5972 00002C5F B2DA                <1> 	mov	dl, 0DAh
  5973 00002C61 EC                  <1> 	in	al, dx
  5974 00002C62 B020                <1> 	mov	al, 20h
  5975                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  5976                              <1> 	; 03/08/2022
  5977 00002C64 B2C0                <1> 	mov	dl, 0C0h 
  5978 00002C66 EE                  <1> 	out	dx, al ; 20h -> set bit 5
  5979                              <1> 		        ; (after loading palette regs)
  5980 00002C67 C3                  <1> 	retn
  5981                              <1> 
  5982                              <1> vga_write_char_attr:
  5983                              <1> vga_write_char_only: 
  5984                              <1> 	; 08/07/2016 (TRDOS 386 = TRDOS v2.0)
  5985                              <1> 	;
  5986                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  5987                              <1> 	; vgabios-0.7a (2011)
  5988                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  5989                              <1> 	; 'vgabios.c', 'biosfn_write_char_attr'
  5990                              <1> 	; 'biosfn_write_char_only'
  5991                              <1> 
  5992                              <1> 	; INPUT ->
  5993                              <1> 	; [CRT_MODE] = current video mode (>7)
  5994                              <1> 	; CX = Count of characters to write
  5995                              <1> 	; AL = Character to write
  5996                              <1> 	; BL = Color of character
  5997                              <1> 	; OUTPUT ->
  5998                              <1> 	; Regen buffer updated
  5999                              <1>  
  6000 00002C68 8A25[1E670000]      <1> 	mov 	ah, [CRT_MODE]
  6001 00002C6E 668B15[66770100]    <1> 	mov	dx, [CURSOR_POSN] ; cursor pos for page 0
  6002                              <1> 
  6003 00002C75 BE[3A670000]        <1> 	mov	esi, vga_modes
  6004 00002C7A 89F7                <1> 	mov	edi, esi
  6005 00002C7C 83C710              <1> 	add	edi, vga_mode_count
  6006                              <1> vga_wca_0:
  6007 00002C7F AC                  <1> 	lodsb
  6008 00002C80 38E0                <1> 	cmp	al, ah ; [CRT_MODE]
  6009 00002C82 7405                <1> 	je	short vga_wca_2
  6010 00002C84 39FE                <1> 	cmp	esi, edi
  6011 00002C86 72F7                <1> 	jb	short vga_wca_0
  6012                              <1> vga_wca_1:
  6013 00002C88 C3                  <1> 	retn	; nothing to do
  6014                              <1> vga_wca_2:
  6015 00002C89 83C64F              <1> 	add	esi, vga_memmodel - (vga_modes + 1)  
  6016                              <1> 	; [ESI] = VGA memory model number (LINEAR8, PLANAR4, PLANAR1)
  6017                              <1> 
  6018                              <1> 	; biosfn_write_char_attr (car,page,attr,count) 
  6019                              <1> 	; AL = car, page = 0, BL = attr, CX = count
  6020 00002C8C 803E04              <1> 	cmp	byte [esi], PLANAR4
  6021 00002C8F 741D                <1> 	je	short vga_wca_planar
  6022 00002C91 803E03              <1> 	cmp	byte [esi], PLANAR1
  6023 00002C94 7418                <1> 	je	short vga_wca_planar
  6024                              <1> vga_wca_linear8:
  6025                              <1> 	; while((count-->0) && (xcurs<nbcols))
  6026                              <1> 	; CX = count
  6027 00002C96 6621C9              <1> 	and	cx, cx
  6028 00002C99 74ED                <1> 	jz	short vga_wca_1
  6029 00002C9B 3A15[20670000]      <1> 	cmp	dl, [CRT_COLS]
  6030 00002CA1 73E5                <1> 	jnb	short vga_wca_1
  6031                              <1> 	; write_gfx_char_lin(car,attr,xcurs,ycurs,nbcols);
  6032                              <1> 	; AL = car, BL = attr, DL = xcurs, DH = ycurs, 
  6033                              <1> 	; [CRT_COLS] = nbcols
  6034 00002CA3 E81E000000          <1> 	call	write_gfx_char_lin	 
  6035 00002CA8 6649                <1> 	dec	cx ; count
  6036 00002CAA FEC2                <1> 	inc	dl ; xcurs
  6037 00002CAC EBE8                <1> 	jmp	short vga_wca_linear8
  6038                              <1> vga_wca_planar:
  6039                              <1> 	; while((count-->0) && (xcurs<nbcols))
  6040                              <1> 	; CX = count
  6041 00002CAE 6621C9              <1> 	and	cx, cx
  6042 00002CB1 74D5                <1> 	jz	short vga_wca_1
  6043 00002CB3 3A15[20670000]      <1> 	cmp	dl, [CRT_COLS]
  6044 00002CB9 73CD                <1> 	jnb	short vga_wca_1
  6045                              <1> 	; write_gfx_char_pl4(car,attr,xcurs,ycurs,nbcols,cheight);
  6046                              <1> 	; AL = car, BL = attr, DL = xcurs, DH = ycurs, 
  6047                              <1> 	; [CRT_COLS] = nbcols, [CHAR_HEIGHT] = cheight
  6048 00002CBB E8A7000000          <1> 	call	write_gfx_char_pl4
  6049 00002CC0 6649                <1> 	dec	cx ; count
  6050 00002CC2 FEC2                <1> 	inc	dl ; xcurs
  6051 00002CC4 EBE8                <1> 	jmp	short vga_wca_planar
  6052                              <1> 
  6053                              <1> write_gfx_char_lin:
  6054                              <1> 	; 02/08/2022 (TRDOS 386 v2.0.5)
  6055                              <1> 	; 08/01/2021
  6056                              <1> 	; 05/01/2021 (TRDOS 386 v2.0.3)
  6057                              <1> 	; 08/08/2016
  6058                              <1> 	; 31/07/2016
  6059                              <1> 	; 08/07/2016 (TRDOS 386 = TRDOS v2.0)
  6060                              <1> 	;
  6061                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  6062                              <1> 	; vgabios-0.7a (2011)
  6063                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  6064                              <1> 	; 'vgabios.c', 'write_gfx_char_lin'
  6065                              <1> 
  6066                              <1> 	; write_gfx_char_lin(car,attr,xcurs,ycurs,nbcols)
  6067                              <1> 	; INPUT ->
  6068                              <1> 	; AL = car, BL = attr, DL = xcurs, DH = ycurs, 
  6069                              <1> 	; [CRT_COLS] = nbcols
  6070                              <1> 	; OUTPUT ->
  6071                              <1> 	; Regen buffer updated
  6072                              <1> 
  6073 00002CC6 51                  <1> 	push	ecx
  6074 00002CC7 53                  <1> 	push	ebx
  6075 00002CC8 52                  <1> 	push	edx
  6076 00002CC9 50                  <1> 	push	eax
  6077                              <1> 	; addr=xcurs*8+ycurs*nbcols*64;
  6078                              <1> 	; 08/08/2016
  6079 00002CCA 0FB6F0              <1> 	movzx	esi, al ; car
  6080                              <1> 	; 08/01/2021
  6081                              <1> 	;movzx	eax, dh ; ycurs
  6082                              <1> 	;mov	ah, [CRT_COLS] ; nbcols
  6083                              <1> 	;mul	ah
  6084 00002CCD A0[20670000]        <1> 	mov	al, [CRT_COLS]
  6085 00002CD2 F6E6                <1> 	mul	dh
  6086                              <1> 	;shl	ax, 6 ; * 64
  6087                              <1> 	;shl	ax, 3 ; 8 * ycurs * [CRT_COLS]
  6088                              <1> 	; 02/08/2022
  6089 00002CD4 C1E003              <1> 	shl	eax, 3
  6090                              <1> 	;sub	dh, dh
  6091                              <1> 	;shl	dx, 3 ; xcurs * 8
  6092                              <1> 	;movzx	edi, dx
  6093 00002CD7 BF00000A00          <1> 	mov	edi, 0A0000h
  6094 00002CDC 30F6                <1> 	xor	dh, dh
  6095 00002CDE 6689D7              <1> 	mov	di, dx
  6096                              <1> 	;movzx	edi, dl
  6097 00002CE1 66C1E703            <1> 	shl	di, 3 ; xcurs * 8
  6098                              <1> 	;xor	dh, dh
  6099 00002CE5 8A15[22670000]      <1> 	mov	dl, [CHAR_HEIGHT]
  6100 00002CEB 66F7E2              <1> 	mul	dx
  6101                              <1> 	; eax = ycurs*nbcols*8*[CHAR_HEIGHT]
  6102                              <1> 	;add	edi, eax ; addr
  6103                              <1> 	;add	edi, 0A0000h
  6104 00002CEE 6601C7              <1> 	add	di, ax
  6105                              <1> 	;shl	si, 3 ; car * 8
  6106 00002CF1 30E4                <1> 	xor	ah, ah
  6107 00002CF3 A0[22670000]        <1> 	mov	al, [CHAR_HEIGHT]
  6108 00002CF8 66F7E6              <1> 	mul	si
  6109 00002CFB 6689C6              <1> 	mov	si, ax
  6110                              <1> 	;; esi = src = car * 8
  6111                              <1> 	; esi = src = car * [CHAR_HEIGHT]
  6112                              <1> 	; i = 0
  6113                              <1> 	;add	esi, vgafont8 ; fdata [src+i]
  6114                              <1> 	; 08/08/2016
  6115 00002CFE A1[EE830100]        <1> 	mov	eax, [VGA_INT43H]
  6116 00002D03 09C0                <1> 	or	eax, eax ; 0 ?
  6117 00002D05 743E                <1> 	jz	short wfxl_7 ; yes, default font
  6118                              <1> 	;cmp	eax, vgafont16
  6119                              <1>         ;je	short wgfxl_0
  6120                              <1> 	;cmp	eax, vgafont14
  6121                              <1> 	;je	short wgfxl_0
  6122                              <1> 	;cmp	eax, vgafont8
  6123                              <1> 	;je	short wgfxl_0
  6124                              <1> 	;; 05/01/2021 (TRDOS 386 v2.0.3)
  6125                              <1> 	;; user font  
  6126                              <1> 	;mov	eax, VGAFONTUSR ; 8x16 or 8x8 or 8x14 font
  6127                              <1> 	;			; (256 characters)
  6128                              <1> wgfxl_0:
  6129 00002D07 01C6                <1> 	add	esi, eax
  6130                              <1> wgfxl_1:
  6131 00002D09 28FF                <1> 	sub	bh, bh ; i = 0
  6132                              <1> wgfxl_2:
  6133                              <1> 	; for(i=0;i<8;i++)
  6134 00002D0B 57                  <1> 	push	edi ; addr
  6135 00002D0C 0FB605[20670000]    <1> 	movzx	eax, byte [CRT_COLS] ; nbcols
  6136 00002D13 F6E7                <1> 	mul	bh ; nbcols*i
  6137                              <1> 	;shl	ax, 3 ; i*nbcols*8
  6138                              <1>  	; 02/08/2022
  6139 00002D15 C1E003              <1> 	shl	eax, 3
  6140                              <1> 	; dest=addr+i*nbcols*8;
  6141 00002D18 01C7                <1> 	add	edi, eax ; dest + j ; j = 0
  6142 00002D1A B180                <1> 	mov	cl, 80h ; mask = 0x80;
  6143                              <1> 	; esi = fdata + src + i
  6144                              <1> 	; for(j=0;j<8;j++)
  6145 00002D1C 29D2                <1> 	sub	edx, edx ; j = 0
  6146                              <1> wgfxl_3:
  6147 00002D1E 8A06                <1> 	mov	al, [esi] ; al = fdata[src+i]
  6148 00002D20 20C8                <1> 	and	al, cl ; if (fdata[src+i] & mask)
  6149 00002D22 7402                <1> 	jz	short wgfxl_4  ; data = 0, zf = 1
  6150 00002D24 88D8                <1> 	mov	al, bl ; data = attr;
  6151                              <1> wgfxl_4:
  6152                              <1> 	; write_byte(0xa000,dest+j,data);		
  6153 00002D26 AA                  <1> 	stosb  ; dest + j (+ 0A0000h)
  6154                              <1> 	;inc	dl ; j++
  6155                              <1> 	;cmp	dl, 8
  6156 00002D27 80FA07              <1> 	cmp	dl, 7
  6157 00002D2A 720E                <1> 	jb	short wgfxl_5
  6158 00002D2C 5F                  <1> 	pop	edi
  6159                              <1> 	; 08/08/2016
  6160                              <1> 	;cmp	bh, 7
  6161                              <1> 	;jnb	short wgfxl_6
  6162 00002D2D FEC7                <1> 	inc	bh ; i++
  6163 00002D2F 3A3D[22670000]      <1> 	cmp	bh, [CHAR_HEIGHT]
  6164 00002D35 7309                <1> 	jnb	short wgfxl_6
  6165 00002D37 46                  <1> 	inc	esi
  6166 00002D38 EBD1                <1> 	jmp	short wgfxl_2
  6167                              <1> wgfxl_5:
  6168 00002D3A D0E9                <1> 	shr	cl, 1 ; mask >>= 1;
  6169 00002D3C FEC2                <1> 	inc	dl ; j++
  6170 00002D3E EBDE                <1>         jmp     short wgfxl_3
  6171                              <1> wgfxl_6:
  6172 00002D40 58                  <1> 	pop	eax
  6173 00002D41 5A                  <1> 	pop	edx
  6174 00002D42 5B                  <1> 	pop	ebx
  6175 00002D43 59                  <1> 	pop	ecx
  6176 00002D44 C3                  <1> 	retn
  6177                              <1> wfxl_7:
  6178                              <1> 	; 08/01/2021
  6179                              <1> 	; 05/01/2021
  6180                              <1> 	; Default font (8x8 or 8x14 or 8x16)
  6181 00002D45 A0[22670000]        <1> 	mov	al, [CHAR_HEIGHT]
  6182 00002D4A 3C08                <1> 	cmp	al, 8
  6183 00002D4C 7507                <1> 	jne	short wfxl_8
  6184 00002D4E B8[D84D0100]        <1> 	mov	eax, vgafont8
  6185 00002D53 EBB2                <1> 	jmp	short wgfxl_0
  6186                              <1> wfxl_8:
  6187 00002D55 3C0E                <1> 	cmp	al, 14
  6188 00002D57 7507                <1> 	jne	short wfxl_9
  6189 00002D59 B8[D8550100]        <1> 	mov	eax, vgafont14
  6190 00002D5E EBA7                <1> 	jmp	short wgfxl_0
  6191                              <1> wfxl_9:
  6192 00002D60 B8[D8630100]        <1> 	mov	eax, vgafont16
  6193 00002D65 EBA0                <1> 	jmp	short wgfxl_0
  6194                              <1> 
  6195                              <1> write_gfx_char_pl4:
  6196                              <1> 	; 02/08/2022 (TRDOS 386 Kernel v2.0.5)
  6197                              <1> 	; 08/08/2016
  6198                              <1> 	; 08/07/2016 (TRDOS 386 = TRDOS v2.0)
  6199                              <1> 	;
  6200                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  6201                              <1> 	; vgabios-0.7a (2011)
  6202                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  6203                              <1> 	; 'vgabios.c', 'write_gfx_char_pl4'
  6204                              <1> 
  6205                              <1> 	; write_gfx_char_pl4(car,attr,xcurs,ycurs,nbcols,cheight)
  6206                              <1> 	; INPUT ->
  6207                              <1> 	; AL = car, BL = attr, DL = xcurs, DH = ycurs, 
  6208                              <1> 	; [CRT_COLS] = nbcols, [CHAR_HEIGHT] = cheight
  6209                              <1> 	; OUTPUT ->
  6210                              <1> 	; Regen buffer updated
  6211                              <1> 
  6212 00002D67 51                  <1> 	push	ecx
  6213 00002D68 53                  <1> 	push	ebx
  6214 00002D69 52                  <1> 	push	edx
  6215 00002D6A 50                  <1> 	push	eax
  6216                              <1> wgfxpl_f0:
  6217                              <1> 	; switch(cheight)
  6218 00002D6B 8A25[22670000]      <1> 	mov	ah, [CHAR_HEIGHT]
  6219 00002D71 80FC10              <1> 	cmp	ah, 16 ; case 16:
  6220 00002D74 7507                <1> 	jne	short wgfxpl_f1
  6221                              <1> 	; fdata = &vgafont16;
  6222 00002D76 BE[D8630100]        <1> 	mov	esi, vgafont16
  6223 00002D7B EB13                <1> 	jmp	short wgfxpl_f3
  6224                              <1> wgfxpl_f1:
  6225 00002D7D 80FC0E              <1> 	cmp	ah, 14 ; case 14:
  6226 00002D80 7507                <1> 	jne	short wgfxpl_f2
  6227 00002D82 BE[D8550100]        <1> 	mov	esi, vgafont14
  6228 00002D87 EB07                <1> 	jmp	short wgfxpl_f3
  6229                              <1> wgfxpl_f2:
  6230                              <1> 	; default:
  6231                              <1> 	;  fdata = &vgafont8;
  6232 00002D89 BE[D84D0100]        <1> 	mov	esi, vgafont8
  6233 00002D8E B408                <1> 	mov	ah, 8	
  6234                              <1> wgfxpl_f3:
  6235                              <1> 	; al = car
  6236 00002D90 F6E4                <1> 	mul	ah ; ah = cheight
  6237 00002D92 25FFFF0000          <1> 	and	eax, 0FFFFh ; car * cheight
  6238                              <1> 	; src = car * cheight;
  6239 00002D97 01C6                <1> 	add	esi, eax ; esi = fdata[src+i]
  6240                              <1> 	; addr=xcurs*8+ycurs*nbcols*64;
  6241 00002D99 88F0                <1> 	mov	al, dh ; ycurs
  6242 00002D9B 8A25[20670000]      <1> 	mov	ah, [CRT_COLS] ; nbcols
  6243 00002DA1 F6E4                <1> 	mul	ah
  6244                              <1> 	; 08/08/2016
  6245                              <1> 	;shl	ax, 6 ; * 64
  6246                              <1> 	;shl	ax, 3 ; * 8
  6247                              <1> 	; 02/08/2022
  6248 00002DA3 C1E003              <1> 	shl	eax, 3
  6249                              <1> 	;sub	dh, dh ; 0
  6250                              <1> 	;shl	dx, 3 ; xcurs * 8
  6251                              <1> 	;movzx	edi, dx
  6252 00002DA6 0FB6FA              <1> 	movzx	edi, dl
  6253                              <1> 	;shl	di, 3 ; xcurs * 8
  6254                              <1> 	; 02/08/2022
  6255 00002DA9 C1E703              <1> 	shl	edi, 3
  6256 00002DAC 30F6                <1> 	xor	dh, dh
  6257 00002DAE 8A15[22670000]      <1> 	mov	dl, [CHAR_HEIGHT]
  6258 00002DB4 66F7E2              <1> 	mul	dx
  6259                              <1> 	; eax = ycurs*nbcols*8*[CHAR_HEIGHT]
  6260 00002DB7 01C7                <1> 	add	edi, eax ; addr
  6261 00002DB9 81C700000A00        <1> 	add	edi, 0A0000h
  6262                              <1> 	;
  6263                              <1> 	; outw(VGAREG_SEQU_ADDRESS, 0x0f02);
  6264                              <1> 	; outw(VGAREG_GRDC_ADDRESS, 0x0205);
  6265 00002DBF 66BAC403            <1> 	mov	dx, 3C4h ; VGAREG_SEQU_ADDRESS
  6266 00002DC3 66B8020F            <1> 	mov	ax, 0F02h
  6267 00002DC7 66EF                <1> 	out	dx, ax
  6268 00002DC9 66BACE03            <1> 	mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  6269 00002DCD 66B80502            <1> 	mov	ax, 0205h
  6270 00002DD1 66EF                <1> 	out	dx, ax
  6271                              <1> 	;
  6272 00002DD3 66BACE03            <1> 	mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  6273 00002DD7 F6C380              <1> 	test	bl, 80h ; if(attr&0x80)
  6274 00002DDA 7406                <1> 	jz	short wgfxpl_f4 ; else
  6275                              <1> 	; outw(VGAREG_GRDC_ADDRESS, 0x1803);
  6276 00002DDC 66B80318            <1> 	mov	ax, 1803h
  6277 00002DE0 EB04                <1> 	jmp	short wgfxpl_f5
  6278                              <1> wgfxpl_f4:
  6279                              <1> 	; outw(VGAREG_GRDC_ADDRESS, 0x0003);
  6280 00002DE2 66B80300            <1> 	mov	ax, 0003h	
  6281                              <1> wgfxpl_f5:
  6282 00002DE6 66EF                <1> 	out	dx, ax
  6283                              <1> 	;	
  6284 00002DE8 28FF                <1> 	sub	bh, bh ; i = 0
  6285                              <1> wgfxpl_0:
  6286                              <1> 	; for(i=0;i<cheight;i++)
  6287 00002DEA 57                  <1> 	push	edi ; addr
  6288 00002DEB 0FB605[20670000]    <1> 	movzx	eax, byte [CRT_COLS] ; nbcols
  6289 00002DF2 F6E7                <1> 	mul	bh ; nbcols*i
  6290                              <1> 	; dest=addr+i*nbcols
  6291 00002DF4 01C7                <1> 	add	edi, eax ; dest
  6292 00002DF6 B580                <1> 	mov	ch, 80h ; mask = 0x80;
  6293                              <1> 	; for(j=0;j<8;j++)
  6294 00002DF8 28C9                <1> 	sub	cl, cl ; j = 0
  6295                              <1> wgfxpl_1:
  6296 00002DFA D2ED                <1> 	shr	ch, cl ; mask=0x80>>j;
  6297                              <1> 	;
  6298                              <1> 	; outw(VGAREG_GRDC_ADDRESS, (mask << 8) | 0x08);
  6299                              <1>      	; read_byte(0xa000,dest);
  6300                              <1> 	;mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  6301 00002DFC 88EC                <1> 	mov	ah, ch
  6302 00002DFE B008                <1> 	mov	al, 8
  6303 00002E00 66EF                <1> 	out	dx, ax
  6304 00002E02 8A07                <1> 	mov	al, [edi] ; ? (io delay?)
  6305                              <1> 	;
  6306 00002E04 28C0                <1> 	sub	al, al ; attr = 0
  6307                              <1> 	; if (fdata[src+i] & mask)
  6308 00002E06 842E                <1> 	test	byte [esi], ch
  6309 00002E08 7404                <1> 	jz	short wgfxpl_2  ; zf = 1
  6310                              <1> 	; write_byte(0xa000,dest,attr&0x0f);
  6311 00002E0A 88D8                <1> 	mov	al, bl ; attr;
  6312 00002E0C 240F                <1> 	and	al, 0Fh	; attr&0x0f
  6313                              <1> wgfxpl_2:
  6314                              <1> 	; write_byte(0xa000,dest,0x00);		
  6315 00002E0E 8807                <1> 	mov	[edi], al ; dest (+ 0A0000h)
  6316 00002E10 FEC1                <1> 	inc	cl ; j++
  6317 00002E12 80F908              <1> 	cmp	cl, 8
  6318 00002E15 72E3                <1> 	jb	short wgfxpl_1
  6319 00002E17 5F                  <1> 	pop	edi
  6320                              <1> 	; 08/08/2016
  6321                              <1> 	;cmp	bh, 7
  6322                              <1> 	;jnb	short wgfxpl_3
  6323 00002E18 FEC7                <1> 	inc	bh ; i++
  6324 00002E1A 3A3D[22670000]      <1> 	cmp	bh, [CHAR_HEIGHT]
  6325 00002E20 7303                <1> 	jnb	short wgfxpl_3
  6326 00002E22 46                  <1> 	inc	esi
  6327 00002E23 EBC5                <1> 	jmp	short wgfxpl_0
  6328                              <1> wgfxpl_3:
  6329                              <1> 	;mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  6330 00002E25 66B808FF            <1>   	mov	ax, 0FF08h
  6331 00002E29 66EF                <1> 	out	dx, ax
  6332 00002E2B 66B80500            <1> 	mov	ax, 0005h
  6333 00002E2F 66EF                <1> 	out	dx, ax
  6334 00002E31 66B80300            <1> 	mov	ax, 0003h
  6335 00002E35 66EF                <1> 	out	dx, ax
  6336                              <1> 	;
  6337 00002E37 58                  <1> 	pop	eax
  6338 00002E38 5A                  <1> 	pop	edx
  6339 00002E39 5B                  <1> 	pop	ebx
  6340 00002E3A 59                  <1> 	pop	ecx
  6341 00002E3B C3                  <1> 	retn
  6342                              <1> 
  6343                              <1> vga_write_pixel:
  6344                              <1> 	; 02/08/2022 (TRDOS 386 Kerbel v2.0.5)
  6345                              <1> 	; 09/07/2016 (TRDOS 386 = TRDOS v2.0)
  6346                              <1> 	;
  6347                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  6348                              <1> 	; vgabios-0.7a (2011)
  6349                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  6350                              <1> 	; 'vgabios.c', 'biosfn_write_pixel'
  6351                              <1> 
  6352                              <1> 	; INPUT ->
  6353                              <1> 	; 	DX = row (0-239)
  6354                              <1> 	; 	CX = column (0-799)
  6355                              <1> 	; 	AL = pixel value
  6356                              <1> 	;	(AH = [CRT_MODE])
  6357                              <1> 	; OUTPUT ->
  6358                              <1> 	; 	none
  6359                              <1>  
  6360 00002E3C 88C3                <1> 	mov	bl, al ; pixel value
  6361                              <1> 	;mov 	ah, [CRT_MODE]
  6362 00002E3E BE[3A670000]        <1> 	mov	esi, vga_modes
  6363 00002E43 89F7                <1> 	mov	edi, esi
  6364 00002E45 83C710              <1> 	add	edi, vga_mode_count
  6365                              <1> vga_wp_0:
  6366 00002E48 AC                  <1> 	lodsb
  6367 00002E49 38E0                <1> 	cmp	al, ah ; [CRT_MODE]
  6368 00002E4B 7405                <1> 	je	short vga_wp_1
  6369 00002E4D 39FE                <1> 	cmp	esi, edi
  6370 00002E4F 72F7                <1> 	jb	short vga_wp_0
  6371 00002E51 C3                  <1> 	retn	; nothing to do
  6372                              <1> vga_wp_1:
  6373 00002E52 83C64F              <1> 	add	esi, vga_memmodel - (vga_modes + 1)  
  6374                              <1> 	; [ESI] = VGA memory model number (LINEAR8, PLANAR4, PLANAR1)
  6375 00002E55 BF00000A00          <1> 	mov	edi, 0A0000h
  6376                              <1> 	;
  6377 00002E5A 803E04              <1> 	cmp	byte [esi], PLANAR4
  6378 00002E5D 741C                <1> 	je	short vga_wp_planar
  6379 00002E5F 803E03              <1> 	cmp	byte [esi], PLANAR1
  6380 00002E62 7417                <1> 	je	short vga_wp_planar
  6381                              <1> vga_wp_linear8:
  6382                              <1> 	; addr=CX+DX*(read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS)*8);
  6383 00002E64 0FB605[20670000]    <1> 	movzx	eax, byte [CRT_COLS] ; = [VGA_COLS] ; nbcols
  6384                              <1>      	;shl	ax, 3 ; * 8
  6385                              <1> 	; 02/08/2022
  6386 00002E6B C1E003              <1> 	shl	eax, 3
  6387 00002E6E 66F7E2              <1> 	mul	dx
  6388 00002E71 50                  <1> 	push	eax
  6389                              <1> 	;mov	edi, 0A0000h
  6390 00002E72 6601CF              <1> 	add	di, cx
  6391 00002E75 58                  <1> 	pop	eax
  6392 00002E76 01C7                <1> 	add	edi, eax ; addr
  6393                              <1> 	; write_byte(0xa000,addr,AL);
  6394 00002E78 881F                <1> 	mov	[edi], bl
  6395 00002E7A C3                  <1> 	retn    
  6396                              <1> vga_wp_planar:
  6397                              <1> 	; addr = CX/8+DX*read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
  6398 00002E7B 0FB7C1              <1> 	movzx	eax, cx
  6399 00002E7E 66C1E803            <1> 	shr	ax, 3 ; CX/8
  6400 00002E82 50                  <1> 	push	eax
  6401 00002E83 28E4                <1> 	sub	ah, ah ; 0
  6402 00002E85 A0[20670000]        <1> 	mov	al, [CRT_COLS] ; = [VGA_COLS] ; nbcols
  6403 00002E8A 66F7E2              <1> 	mul	dx
  6404                              <1> 	;mov	edi, 0A0000h
  6405 00002E8D 6601C7              <1>         add     di, ax
  6406 00002E90 58                  <1> 	pop	eax
  6407 00002E91 01C7                <1> 	add	edi, eax ; addr
  6408 00002E93 80E107              <1> 	and	cl, 7
  6409 00002E96 B580                <1> 	mov	ch, 80h ; mask
  6410 00002E98 D2ED                <1> 	shr	ch, cl 	; mask = 0x80 >> (CX & 0x07);
  6411                              <1> 	
  6412                              <1> 	; outw(VGAREG_GRDC_ADDRESS, (mask << 8) | 0x08);
  6413 00002E9A 66BACE03            <1> 	mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  6414 00002E9E 88EC                <1> 	mov	ah, ch
  6415 00002EA0 B008                <1> 	mov	al, 8
  6416 00002EA2 66EF                <1> 	out	dx, ax
  6417                              <1> 	; outw(VGAREG_GRDC_ADDRESS, 0x0205);
  6418 00002EA4 66B80502            <1> 	mov	ax, 0205h
  6419 00002EA8 66EF                <1> 	out	dx, ax
  6420                              <1> 	; data = read_byte(0xa000,addr);
  6421 00002EAA 8A07                <1> 	mov	al, [edi] ; (delay?)	
  6422                              <1> 	; if (AL & 0x80)
  6423                              <1> 	; {
  6424                              <1> 	;  outw(VGAREG_GRDC_ADDRESS, 0x1803);
  6425                              <1> 	; }
  6426 00002EAC F6C380              <1> 	test	bl, 80h
  6427 00002EAF 7406                <1> 	jz	short vga_wp_2
  6428 00002EB1 66B80318            <1> 	mov	ax, 1803h
  6429 00002EB5 66EF                <1> 	out	dx, ax
  6430                              <1> vga_wp_2:	
  6431                              <1> 	; write_byte(0xa000,addr,AL);
  6432 00002EB7 881F                <1> 	mov	[edi], bl
  6433                              <1> 	;
  6434                              <1> 	;mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  6435 00002EB9 66B808FF            <1>   	mov	ax, 0FF08h
  6436 00002EBD 66EF                <1> 	out	dx, ax
  6437 00002EBF 66B80500            <1> 	mov	ax, 0005h
  6438 00002EC3 66EF                <1> 	out	dx, ax
  6439 00002EC5 66B80300            <1> 	mov	ax, 0003h
  6440 00002EC9 66EF                <1> 	out	dx, ax
  6441                              <1> 	;
  6442 00002ECB C3                  <1> 	retn
  6443                              <1> 
  6444                              <1> vga_read_pixel: 
  6445                              <1> 	; 02/08/2022 (TRDOS 386 Kernel v2.0.5)
  6446                              <1> 	; 09/07/2016 (TRDOS 386 = TRDOS v2.0)
  6447                              <1> 	;
  6448                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  6449                              <1> 	; vgabios-0.7a (2011)
  6450                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  6451                              <1> 	; 'vgabios.c', 'biosfn_read_pixel'
  6452                              <1> 
  6453                              <1> 	; INPUT ->
  6454                              <1> 	; 	DX = row (0-239)
  6455                              <1> 	; 	CX = column (0-799)
  6456                              <1> 	;	(AH = [CRT_MODE])
  6457                              <1> 	; OUTPUT ->
  6458                              <1> 	; 	AL = pixel value
  6459                              <1> 	 
  6460                              <1> 	;mov 	ah, [CRT_MODE]
  6461 00002ECC BE[3A670000]        <1> 	mov	esi, vga_modes
  6462 00002ED1 89F7                <1> 	mov	edi, esi
  6463 00002ED3 83C710              <1> 	add	edi, vga_mode_count
  6464                              <1> vga_rp_0:
  6465 00002ED6 AC                  <1> 	lodsb
  6466 00002ED7 38E0                <1> 	cmp	al, ah ; [CRT_MODE]
  6467 00002ED9 7405                <1> 	je	short vga_rp_1
  6468 00002EDB 39FE                <1> 	cmp	esi, edi
  6469 00002EDD 72F7                <1> 	jb	short vga_rp_0
  6470 00002EDF C3                  <1> 	retn	; nothing to do
  6471                              <1> vga_rp_1:
  6472 00002EE0 83C64F              <1> 	add	esi, vga_memmodel - (vga_modes + 1)  
  6473                              <1> 	; [ESI] = VGA memory model number (LINEAR8, PLANAR4, PLANAR1)
  6474 00002EE3 BF00000A00          <1> 	mov	edi, 0A0000h
  6475                              <1> 	;
  6476 00002EE8 803E04              <1> 	cmp	byte [esi], PLANAR4
  6477 00002EEB 741C                <1> 	je	short vga_rp_planar
  6478 00002EED 803E03              <1> 	cmp	byte [esi], PLANAR1
  6479 00002EF0 7417                <1> 	je	short vga_rp_planar
  6480                              <1> vga_rp_linear8:
  6481                              <1> 	; addr=CX+DX*(read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS)*8);
  6482 00002EF2 0FB605[20670000]    <1> 	movzx	eax, byte [CRT_COLS] ; = [VGA_COLS] ; nbcols
  6483                              <1>      	;shl	ax, 3 ; * 8
  6484                              <1> 	; 02/08/2022
  6485 00002EF9 C1E003              <1> 	shl	eax, 3
  6486 00002EFC 66F7E2              <1> 	mul	dx
  6487 00002EFF 50                  <1> 	push	eax
  6488                              <1> 	;mov	edi, 0A0000h
  6489 00002F00 6601CF              <1> 	add	di, cx
  6490 00002F03 58                  <1> 	pop	eax
  6491 00002F04 01C7                <1> 	add	edi, eax ; addr
  6492                              <1> 	; attr=read_byte(0xa000,addr);
  6493 00002F06 8A07                <1> 	mov	al, [edi] ; pixel value
  6494 00002F08 C3                  <1> 	retn    
  6495                              <1> vga_rp_planar:
  6496                              <1> 	; addr = CX/8+DX*read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS);
  6497 00002F09 0FB7C1              <1> 	movzx	eax, cx
  6498 00002F0C 66C1E803            <1> 	shr	ax, 3 ; CX/8
  6499 00002F10 50                  <1> 	push	eax
  6500 00002F11 28E4                <1> 	sub	ah, ah ; 0
  6501 00002F13 A0[20670000]        <1> 	mov	al, [CRT_COLS] ; = [VGA_COLS] ; nbcols
  6502 00002F18 66F7E2              <1> 	mul	dx
  6503                              <1> 	;mov	edi, 0A0000h
  6504 00002F1B 6601C7              <1>         add     di, ax
  6505 00002F1E 58                  <1> 	pop	eax
  6506 00002F1F 01C7                <1> 	add	edi, eax ; addr
  6507 00002F21 80E107              <1> 	and	cl, 7
  6508 00002F24 B580                <1> 	mov	ch, 80h ; mask
  6509 00002F26 D2ED                <1> 	shr	ch, cl 	; mask = 0x80 >> (CX & 0x07);
  6510                              <1> 	; attr = 0x00;
  6511 00002F28 30DB                <1> 	xor	bl, bl ; attr = bl = 0, 
  6512 00002F2A 30C9                <1> 	xor	cl, cl ; i = cl = 0
  6513                              <1> 	; for(i=0;i<4;i++)
  6514                              <1>       	; {
  6515                              <1>        	;  outw(VGAREG_GRDC_ADDRESS, (i << 8) | 0x04);
  6516                              <1>        	;  data = read_byte(0xa000,addr) & mask;
  6517                              <1>        	;  if (data > 0) attr |= (0x01 << i);
  6518                              <1>       	; }
  6519                              <1> vga_rp_2:
  6520 00002F2C 88CC                <1> 	mov	ah, cl ; i << 8
  6521 00002F2E B004                <1> 	mov	al, 4  ; | 0x04
  6522 00002F30 66BACE03            <1> 	mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  6523 00002F34 66EF                <1> 	out	dx, ax
  6524                              <1> 	; data = read_byte(0xa000,addr) & mask;
  6525 00002F36 8A07                <1> 	mov	al, [edi]
  6526 00002F38 20E8                <1> 	and	al, ch ; & mask
  6527                              <1> 	; if (data > 0) attr |= (0x01 << i);
  6528 00002F3A 08C0                <1> 	or	al, al
  6529 00002F3C 7408                <1> 	jz	short vga_rp_3 ; al = 0 
  6530 00002F3E B701                <1> 	mov	bh, 1
  6531 00002F40 D2E7                <1> 	shl	bh, cl ; (0x01 << i)
  6532 00002F42 08FB                <1> 	or	bl, bh ; attr |= (0x01 << i)
  6533 00002F44 88D8                <1> 	mov	al, bl ; pixel value	
  6534                              <1> vga_rp_3:	
  6535 00002F46 C3                  <1> 	retn
  6536                              <1> 
  6537                              <1> vga_beeper:
  6538                              <1> 	; 04/08/2016  (TRDOS 386 = TRDOS v2.0)
  6539 00002F47 FB                  <1> 	sti
  6540                              <1> 	;mov	bh, [ACTIVE_PAGE]
  6541 00002F48 E917F4FFFF          <1>         jmp     beeper_gfx
  6542                              <1> 
  6543                              <1> vga_write_teletype:
  6544                              <1> 	; 03/08/2022 (TRDOS 386 Kernel v2.0.5)
  6545                              <1> 	; 12/04/2021 (TRDOS 386 v2.0.3, 32 bit push/pop)
  6546                              <1> 	; 09/12/2017
  6547                              <1> 	; 06/08/2016
  6548                              <1> 	; 04/08/2016
  6549                              <1> 	; 01/08/2016
  6550                              <1> 	; 31/07/2016
  6551                              <1> 	; 09/07/2016 (TRDOS 386 = TRDOS v2.0)
  6552                              <1> 	;
  6553                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  6554                              <1> 	; vgabios-0.7a (2011)
  6555                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  6556                              <1> 	; 'vgabios.c', 'biosfn_write_teletype'
  6557                              <1> 	; 'biosfn_write_char_only'
  6558                              <1> 
  6559                              <1> 	; INPUT ->
  6560                              <1> 	; [CRT_MODE] = current video mode (>7)
  6561                              <1> 	; AL = Character to write
  6562                              <1> 	; BL = Color of character
  6563                              <1> 	; OUTPUT ->
  6564                              <1> 	; Regen buffer updated
  6565                              <1> 
  6566                              <1> 	; biosfn_write_teletype (car, page, attr, flag) 
  6567                              <1> 	; car = character (AL)
  6568                              <1> 	; page = 0
  6569                              <1> 	; attr = color (BL)
  6570                              <1> 	; 'flag' not used
  6571                              <1> 
  6572 00002F4D 8A25[1E670000]      <1> 	mov 	ah, [CRT_MODE]
  6573 00002F53 88C7                <1> 	mov	bh, al ; character
  6574 00002F55 668B15[66770100]    <1> 	mov	dx, [CURSOR_POSN] ; cursor pos for page 0
  6575                              <1> 
  6576 00002F5C BE[42670000]        <1> 	mov	esi, vga_g_modes
  6577 00002F61 89F7                <1> 	mov	edi, esi
  6578 00002F63 83C708              <1> 	add	edi, vga_g_mode_count
  6579                              <1> vga_wtty_0:
  6580 00002F66 AC                  <1> 	lodsb
  6581 00002F67 38E0                <1> 	cmp	al, ah ; [CRT_MODE]
  6582 00002F69 7405                <1> 	je	short vga_wtty_2
  6583 00002F6B 39FE                <1> 	cmp	esi, edi
  6584 00002F6D 72F7                <1> 	jb	short vga_wtty_0
  6585                              <1> vga_wtty_1:
  6586 00002F6F C3                  <1> 	retn	; nothing to do
  6587                              <1> vga_wtty_2:
  6588 00002F70 80FF07              <1> 	cmp	bh, 07h ; bell (beep)
  6589 00002F73 74D2                <1> 	je	short vga_beeper  ; u11
  6590 00002F75 80FF08              <1> 	cmp	bh, 08h ; backspace
  6591 00002F78 7508                <1> 	jne	short vga_wtty_3
  6592                              <1> 	; if(xcurs>0)xcurs--;
  6593 00002F7A 08D2                <1> 	or	dl, dl ; xcurs (column)
  6594 00002F7C 74F1                <1> 	jz	short vga_wtty_1
  6595 00002F7E FECA                <1> 	dec	dl ; xcurs--;
  6596 00002F80 EB55                <1>         jmp     short vga_wtty_12 
  6597                              <1> vga_wtty_3:			
  6598 00002F82 80FF0D              <1> 	cmp	bh, 0Dh ; carriage return (\r)
  6599 00002F85 7504                <1> 	jne	short vga_wtty_4
  6600                              <1> 	; xcurs=0;
  6601 00002F87 28D2                <1> 	sub	dl, dl ; 0
  6602 00002F89 EB4C                <1>         jmp     short vga_wtty_12 
  6603                              <1> vga_wtty_4:	
  6604 00002F8B 80FF0A              <1> 	cmp	bh, 0Ah ; new line (\n)
  6605 00002F8E 7504                <1> 	jne	short vga_wtty_5
  6606                              <1> 	; ycurs++;
  6607 00002F90 FEC6                <1> 	inc	dh ; next row
  6608 00002F92 EB5E                <1>         jmp     short vga_wtty_11
  6609                              <1> vga_wtty_5:
  6610 00002F94 80FF09              <1> 	cmp 	bh, 09h ; tab stop
  6611 00002F97 7523                <1> 	jne	short vga_wtty_8
  6612 00002F99 88D0                <1> 	mov	al, dl
  6613                              <1> 	;cbw
  6614 00002F9B 30E4                <1> 	xor	ah, ah ; 09/12/2017
  6615 00002F9D B108                <1> 	mov	cl, 8
  6616 00002F9F F6F1                <1> 	div	cl
  6617 00002FA1 28E1                <1> 	sub	cl, ah
  6618                              <1> 	;
  6619 00002FA3 B720                <1> 	mov	bh, 20h ; space
  6620                              <1> vga_wtty_6: ; tab stop loop
  6621                              <1> 	;push	cx
  6622                              <1> 	;push	bx
  6623                              <1> 	; 12/04/2021
  6624 00002FA5 51                  <1> 	push	ecx
  6625 00002FA6 53                  <1> 	push	ebx
  6626 00002FA7 E810000000          <1> 	call	vga_wtty_8
  6627                              <1> 	;pop	bx  ; bh = character, bl = color
  6628                              <1> 	;pop	cx
  6629                              <1> 	; 12/04/2021
  6630 00002FAC 5B                  <1> 	pop	ebx  ; bh = character, bl = color
  6631 00002FAD 59                  <1> 	pop	ecx
  6632 00002FAE FEC9                <1> 	dec	cl
  6633 00002FB0 7409                <1> 	jz	short vga_wtty_7
  6634 00002FB2 668B15[66770100]    <1> 	mov	dx, [CURSOR_POSN] ; new cursor position (pg 0)
  6635 00002FB9 EBEA                <1> 	jmp	short vga_wtty_6
  6636                              <1> vga_wtty_7:
  6637 00002FBB C3                  <1> 	retn
  6638                              <1> 	;
  6639                              <1> vga_wtty_8:
  6640 00002FBC 83C64F              <1> 	add	esi, vga_g_memmodel - (vga_g_modes + 1)  
  6641                              <1> 	; [ESI] = VGA memory model number (LINEAR8, PLANAR4, PLANAR1)
  6642 00002FBF BF00000A00          <1> 	mov	edi, 0A0000h
  6643                              <1> 	;
  6644 00002FC4 88F8                <1> 	mov	al, bh ; character
  6645                              <1> 	;
  6646 00002FC6 803E04              <1> 	cmp	byte [esi], PLANAR4
  6647 00002FC9 7414                <1> 	je	short vga_wtty_planar
  6648 00002FCB 803E03              <1> 	cmp	byte [esi], PLANAR1
  6649 00002FCE 740F                <1> 	je	short vga_wtty_planar
  6650                              <1> vga_wtty_linear8:
  6651                              <1> 	; write_gfx_char_lin(car,attr,xcurs,ycurs,nbcols);
  6652                              <1> 	; AL = car, BL = attr (color), DL = xcurs, DH = ycurs, 
  6653                              <1> 	; [CRT_COLS] = nbcols
  6654 00002FD0 E8F1FCFFFF          <1> 	call	write_gfx_char_lin
  6655 00002FD5 EB0D                <1> 	jmp	short vga_wtty_9
  6656                              <1> 
  6657                              <1> vga_wtty_12:
  6658                              <1> 	; 09/07/2016
  6659                              <1> 	; set cursor position
  6660                              <1> 	; NOTE: Hardware cursor position will not be set
  6661                              <1> 	;   in any VGA modes (>7)
  6662                              <1> 	;   But, cursor position will be saved into
  6663                              <1> 	;   [CURSOR_POSN].
  6664                              <1> 	;   TRDOS 386 (TRDOS v2.0) uses only one page
  6665                              <1> 	;   (page 0) for all graphics modes.
  6666                              <1> 
  6667 00002FD7 668915[66770100]    <1> 	mov	[CURSOR_POSN], dx ; save cursor pos for pg 0
  6668                              <1> 	; 04/08/2016
  6669                              <1> 	;mov	bh, [ACTIVE_PAGE] ; = 0
  6670                              <1> 	;call	_set_cpos
  6671 00002FDE C3                  <1> 	retn
  6672                              <1> 
  6673                              <1> vga_wtty_planar:
  6674                              <1> 	; write_gfx_char_pl4(car,attr,xcurs,ycurs,nbcols,cheight);
  6675                              <1> 	; AL = car, BL = attr (color), DL = xcurs, DH = ycurs, 
  6676                              <1> 	; [CRT_COLS]= nbcols, [CHAR_HEIGHT] = cheight
  6677 00002FDF E883FDFFFF          <1> 	call	write_gfx_char_pl4
  6678                              <1> vga_wtty_9:
  6679 00002FE4 FEC2                <1> 	inc	dl ; xcurs++;
  6680                              <1> vga_wtty_10:
  6681                              <1> 	; Do we need to wrap ?
  6682                              <1> 	; if(xcurs==nbcols)
  6683 00002FE6 3A15[20670000]      <1> 	cmp	dl, [CRT_COLS] ; [VGA_COLS]
  6684 00002FEC 7204                <1> 	jb	short vga_wtty_11 ; no
  6685 00002FEE 28D2                <1> 	sub	dl, dl ; xcurs=0;
  6686 00002FF0 FEC6                <1> 	inc	dh ;  ycurs++;
  6687                              <1> vga_wtty_11:
  6688                              <1> 	; Do we need to scroll ?
  6689                              <1> 	; if(ycurs==nbrows)
  6690 00002FF2 3A35[26670000]      <1> 	cmp	dh, [VGA_ROWS]
  6691 00002FF8 72DD                <1> 	jb	short vga_wtty_12 ; no
  6692                              <1> 	;
  6693                              <1> 	; biosfn_scroll (nblines,attr,rul,cul,rlr,clr,page,dir)
  6694                              <1> 	; al = nblines = 1, bl = attr (color) = 0
  6695                              <1> 	; ch = rul, cl = cul, dh = rlr, dl = clr, page = 0
  6696                              <1> 	; dir = SCROLL_UP
  6697                              <1> 	
  6698 00002FFA B001                <1> 	mov	al, 1
  6699 00002FFC 28DB                <1> 	sub	bl, bl ; 0 ; blank/black line (attr=0) will be used
  6700                              <1> 	;sub	cx, cx ; 0,0
  6701                              <1> 	; 03/08/2022
  6702 00002FFE 29C9                <1> 	sub	ecx, ecx
  6703                              <1> 
  6704                              <1> 	; 06/08/2016
  6705 00003000 8A35[26670000]      <1> 	mov	dh, [VGA_ROWS]
  6706 00003006 FECE                <1> 	dec	dh ; nbrows -1
  6707                              <1> 
  6708                              <1> 	;push	dx ; 04/08/2016
  6709                              <1> 	; 12/04/2021
  6710 00003008 52                  <1> 	push	edx
  6711 00003009 8A15[20670000]      <1> 	mov	dl, [CRT_COLS]
  6712 0000300F FECA                <1> 	dec	dl ; nbcols -1
  6713                              <1> 	
  6714 00003011 8A25[1E670000]      <1> 	mov	ah, [CRT_MODE]
  6715                              <1> 	
  6716                              <1> 	; biosfn_scroll(0x01,0x00,0,0,nbrows-1,nbcols-1,page,SCROLL_UP);
  6717 00003017 E843F5FFFF          <1> 	call	vga_graphics_up
  6718                              <1> 	; 04/08/2016
  6719                              <1> 	;pop	dx
  6720                              <1> 	; 12/04/2021
  6721 0000301C 5A                  <1> 	pop	edx
  6722                              <1> 
  6723                              <1> 	;dec	dh ; ycurs-=1
  6724 0000301D EBB8                <1> 	jmp	short vga_wtty_12 
  6725                              <1> 
  6726                              <1> font_setup:
  6727                              <1> 	; 03/08/2022 (TRDOS 386 v2.0.5)
  6728                              <1> 	; 09/01/2021 (TRDOS 386 v2.0.3)
  6729                              <1> 	; 09/07/2016
  6730                              <1> 	; character generator (font loading) functions
  6731                              <1> 	;
  6732                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  6733                              <1> 	; vgabios-0.7a (2011)
  6734                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  6735                              <1> 	; 'vgabios.c', 'int10_func'
  6736                              <1> 
  6737                              <1> 	; AX = 1100H ; Load User-Defined Font (EGA/VGA)
  6738                              <1> 	;
  6739                              <1>         ; BH =  height of each character (bytes per character definition)
  6740                              <1>         ; (BL = font block to load (EGA: 0-3; VGA: 0-7))
  6741                              <1> 	; CX =  number of characters to redefine (<=256)
  6742                              <1>         ; DX =  ASCII code of the first character defined at ES:BP
  6743                              <1>         ; EBP =	address of font-definition information
  6744                              <1> 	;	(in user's memory space)
  6745                              <1> 
  6746                              <1> 	; case 0x11:
  6747                              <1>      	; switch(GET_AL())
  6748                              <1>       	; {
  6749                              <1> 	; case 0x00:
  6750                              <1>         ; case 0x10:
  6751                              <1>         ; biosfn_load_text_user_pat(GET_AL(),ES,BP,CX,DX,GET_BL(),GET_BH());
  6752                              <1>         ; break;
  6753                              <1> 
  6754                              <1> 	; AX = 1110H ; Load and Activate User-Defined Font (EGA/VGA)
  6755 0000301F 08C0                <1> 	or	al, al ; 0
  6756 00003021 7404                <1> 	jz	short font_setup_0
  6757 00003023 3C10                <1> 	cmp	al, 10h
  6758 00003025 7511                <1> 	jne	short font_setup_1	
  6759                              <1> font_setup_0:
  6760 00003027 E8CE000000          <1> 	call	transfer_user_fonts
  6761 0000302C 721C                <1> 	jc	short font_setup_error
  6762 0000302E E8AD010000          <1> 	call	load_text_user_pat
  6763 00003033 E9D6EAFFFF          <1>         jmp     VIDEO_RETURN 
  6764                              <1> font_setup_1:
  6765                              <1> 	; AX = 1101H ; Load ROM 8x14 Character Set (EGA/VGA)
  6766                              <1> 	; case 0x01:
  6767                              <1>         ; case 0x11:
  6768                              <1>         ; biosfn_load_text_8_14_pat(GET_AL(),GET_BL());
  6769                              <1>         ; break;
  6770 00003038 3C01                <1> 	cmp	al, 1
  6771 0000303A 7404                <1> 	je	short font_setup_2
  6772 0000303C 3C11                <1> 	cmp	al, 11h
  6773 0000303E 7511                <1> 	jne	short font_setup_3	
  6774                              <1> font_setup_2:
  6775                              <1> 	; AX = 1111H ; Load and Activate ROM 8x14 Character Set (EGA/VGA)
  6776                              <1> 	; (BL = font block to load (EGA: 0-3; VGA: 0-7))
  6777 00003040 E8C9020000          <1> 	call	load_text_8_14_pat
  6778 00003045 E9C4EAFFFF          <1>         jmp     VIDEO_RETURN
  6779                              <1> font_setup_error:
  6780 0000304A 29C0                <1> 	sub	eax, eax ; 0 -> fonts could not be loaded
  6781 0000304C E9C2EAFFFF          <1> 	jmp	_video_return
  6782                              <1> font_setup_3:
  6783                              <1> 	; AX = 1102H ; Load ROM 8x8 Character Set (EGA/VGA)
  6784                              <1> 	; case 0x02:
  6785                              <1>         ; case 0x12:
  6786                              <1>         ; biosfn_load_text_8_8_pat(GET_AL(),GET_BL());
  6787                              <1>         ; break;
  6788 00003051 3C02                <1> 	cmp	al, 2
  6789 00003053 7404                <1> 	je	short font_setup_4
  6790 00003055 3C12                <1> 	cmp	al, 12h
  6791 00003057 750A                <1> 	jne	short font_setup_5	
  6792                              <1> font_setup_4:
  6793                              <1> 	; AX = 1112H ; Load and Activate ROM 8x8 Character Set (EGA/VGA)
  6794                              <1> 	; (BL = font block to load (EGA: 0-3; VGA: 0-7))
  6795 00003059 E8E1020000          <1> 	call	load_text_8_8_pat
  6796 0000305E E9ABEAFFFF          <1>         jmp     VIDEO_RETURN
  6797                              <1> font_setup_5:
  6798                              <1> 	; AX = 1104H ; Load ROM 8x16 Character Set (EGA/VGA)
  6799                              <1> 	; case 0x04:
  6800                              <1>         ; case 0x14:
  6801                              <1>         ; biosfn_load_text_8_16_pat(GET_AL(),GET_BL());
  6802                              <1>         ; break;
  6803 00003063 3C04                <1> 	cmp	al, 4
  6804 00003065 7404                <1> 	je	short font_setup_6
  6805 00003067 3C14                <1> 	cmp	al, 14h
  6806 00003069 750A                <1> 	jne	short font_setup_7	
  6807                              <1> font_setup_6:
  6808                              <1> 	; AX = 1114H ; Load and Activate ROM 8x16 Character Set (EGA/VGA)
  6809                              <1> 	; (BL = font block to load (EGA: 0-3; VGA: 0-7))
  6810 0000306B E819030000          <1> 	call	load_text_8_16_pat
  6811 00003070 E999EAFFFF          <1>         jmp     VIDEO_RETURN
  6812                              <1> font_setup_7:
  6813                              <1> 	; Note: AX=1120h (Setup INT 1Fh, EXT_PTR) is not needed
  6814                              <1> 	; for TRDOS 386 (TRDOS v2.0) video functionality;
  6815                              <1> 	; because, originally EXT_PTR (font address) was used for
  6816                              <1> 	; chars 80h to 0FFh (after the first 128 ASCII char fonts), for
  6817                              <1> 	; CGA graphics mode; currenty, 'vgafont8' address has 256 chars!
  6818                              <1> 	; 
  6819                              <1> 	; case 0x20:
  6820                              <1>         ; biosfn_load_gfx_8_8_chars(ES,BP);
  6821                              <1>         ; break; 
  6822                              <1> 	; case 0x21:
  6823                              <1>         ; biosfn_load_gfx_user_chars(ES,BP,CX,GET_BL(),GET_DL());
  6824                              <1>         ; break;
  6825                              <1> 	; AX = 1121H ; Setup User-Defined Font for Graphics Mode (VGA)
  6826                              <1> 	; BL   screen rows code: 00H = user-specified (in DL)
  6827                              <1>         ;                        01H = 14 rows
  6828                              <1>         ;                        02H = 25 rows
  6829                              <1>         ;                        03H = 43 rows
  6830                              <1>         ; CX   bytes per character definition
  6831                              <1>         ; DL   (when BL=0) custom number of character rows on screen
  6832                              <1>         ; EBP  address of font-definition information (user's mem space)
  6833                              <1> 
  6834 00003075 3C21                <1> 	cmp	al, 21h
  6835 00003077 7531                <1> 	jne	short font_setup_9
  6836                              <1> 
  6837                              <1> 	; TRDOS 386 modification !
  6838                              <1> 	; dh = 0 -> 256 characters
  6839                              <1> 	; dh = 80h -> second 128 characters
  6840                              <1> 	; dh = 0FFh -> first 128 characters
  6841                              <1> 
  6842                              <1> 	; 09/01/2021 (TRDOS 386 v2.0.3)
  6843                              <1> 	;push	ebx
  6844 00003079 51                  <1> 	push	ecx
  6845 0000307A 52                  <1> 	push	edx
  6846 0000307B 30D2                <1> 	xor	dl, dl
  6847 0000307D 88CF                <1> 	mov	bh, cl ; character height
  6848                              <1> 	;mov	cx, 100h ; 256
  6849                              <1> 	; 03/08/2022
  6850 0000307F 31C9                <1> 	xor 	ecx, ecx
  6851 00003081 FEC5                <1> 	inc	ch
  6852                              <1> 	; ecx = 100h
  6853 00003083 08F6                <1> 	or	dh, dh ; 0
  6854 00003085 7410                <1> 	jz	short  font_setup_8
  6855 00003087 FECD                <1> 	dec	ch ; cx = 0
  6856 00003089 80FEFF              <1> 	cmp	dh, 0FFh
  6857 0000308C 7409                <1> 	je	short font_setup_8 ; 1st 128 chars
  6858                              <1> 	; 2nd 128 chars
  6859 0000308E 80FE80              <1> 	cmp	dh, 80h
  6860 00003091 75B7                <1> 	jne	short font_setup_error ; invalid !
  6861 00003093 88F1                <1> 	mov	cl, dh
  6862 00003095 86D6                <1> 	xchg	dl, dh
  6863                              <1> 	; number of chars, cx = 80h 
  6864                              <1> 	; start char, dl = 80h
  6865                              <1> font_setup_8:	
  6866 00003097 E85E000000          <1> 	call	transfer_user_fonts
  6867 0000309C 5A                  <1> 	pop	edx
  6868 0000309D 59                  <1> 	pop	ecx
  6869                              <1> 	;pop	ebx
  6870 0000309E 72AA                <1> 	jc	short font_setup_error
  6871                              <1> 	; ebp = user's font data address in system's memory space
  6872 000030A0 E82F030000          <1> 	call	load_gfx_user_chars
  6873 000030A5 E964EAFFFF          <1>         jmp     VIDEO_RETURN 
  6874                              <1> font_setup_9:
  6875                              <1> 	; case 0x22:
  6876                              <1>         ; biosfn_load_gfx_8_14_chars(GET_BL());
  6877                              <1>         ; break;
  6878 000030AA 3C22                <1> 	cmp	al, 22h
  6879 000030AC 750A                <1> 	jne	short font_setup_10
  6880 000030AE E85D030000          <1> 	call	load_gfx_8_14_chars	
  6881 000030B3 E956EAFFFF          <1>         jmp     VIDEO_RETURN 
  6882                              <1> font_setup_10:	
  6883                              <1> 	; case 0x23:
  6884                              <1>         ; biosfn_load_gfx_8_8_dd_chars(GET_BL());
  6885                              <1>         ; break;
  6886 000030B8 3C23                <1> 	cmp	al, 23h
  6887 000030BA 750A                <1> 	jne	short font_setup_11
  6888 000030BC E890030000          <1> 	call	load_gfx_8_8_chars	
  6889 000030C1 E948EAFFFF          <1>         jmp     VIDEO_RETURN 
  6890                              <1> font_setup_11:	
  6891                              <1> 	; case 0x24:
  6892                              <1>         ; biosfn_load_gfx_8_16_chars(GET_BL());
  6893                              <1>         ; break;
  6894 000030C6 3C24                <1> 	cmp	al, 24h
  6895 000030C8 750A                <1> 	jne	short font_setup_12
  6896 000030CA E8C3030000          <1> 	call	load_gfx_8_16_chars	
  6897 000030CF E93AEAFFFF          <1>         jmp     VIDEO_RETURN 
  6898                              <1> font_setup_12:
  6899                              <1>  	; case 0x30:
  6900                              <1>         ; biosfn_get_font_info(GET_BH(),&ES,&BP,&CX,&DX);
  6901                              <1>         ; break;
  6902 000030D4 3C30                <1> 	cmp	al, 30h
  6903 000030D6 750A                <1> 	jne	short font_setup_13			
  6904 000030D8 E8F6030000          <1> 	call	get_font_info
  6905                              <1> 	; eax = return value (info: 4 bytes for 4 parms)
  6906                              <1> 	; eax = 0 -> invalid function (input)
  6907 000030DD E931EAFFFF          <1>         jmp     _video_return
  6908                              <1> font_setup_13:
  6909 000030E2 3C03                <1> 	cmp	al, 03h ; AX = 1103h	
  6910 000030E4 750D                <1> 	jne	short font_setup_14
  6911                              <1> 	; biosfn_set_text_block_specifier:
  6912                              <1> 	; BL = font block selector code	
  6913                              <1> 	; NOTE: TRDOS 386 only uses and sets font block 0
  6914                              <1> 	; (It is as BL = 0 for TRDOS 386)
  6915 000030E6 66BAC403            <1> 	mov	dx, 3C4h ; VGAREG_SEQU_ADDRESS
  6916                              <1> 	;mov	ah, bl
  6917 000030EA 28E4                <1> 	sub	ah, ah ; 0
  6918                              <1> 	;mov	al, 03h
  6919 000030EC 66EF                <1> 	out	dx, ax
  6920 000030EE E91BEAFFFF          <1> 	jmp     VIDEO_RETURN 
  6921                              <1> 	
  6922                              <1> font_setup_14:
  6923 000030F3 29C0                <1> 	sub	eax, eax ; 0 = invalid function
  6924 000030F5 E919EAFFFF          <1>         jmp     _video_return
  6925                              <1> 
  6926                              <1> transfer_user_fonts:
  6927                              <1> 	; 02/08/2022 (TRDOS 386 Kernel v2.0.5)
  6928                              <1> 	; 19/01/2021
  6929                              <1> 	; 09/01/2021
  6930                              <1> 	; 05/01/2021 (TRDOS 386 v2.0.3)
  6931                              <1> 
  6932                              <1> 	; BH =  height of each character (bytes per character)
  6933                              <1> 	; CX =  number of characters to redefine (<=256)
  6934                              <1>         ; DX =  ASCII code of the first character defined at EBP
  6935                              <1>         ; EBP =	address of font-definition information
  6936                              <1> 	;	(in user's memory space)
  6937                              <1> 
  6938                              <1> 	; Modified registers: eax, edx, ecx, esi, edi, ebp
  6939                              <1> 	;
  6940                              <1> 	; output:
  6941                              <1> 	;	ebp = user font data address in system memory
  6942                              <1> 
  6943 000030FA 81E2FFFF0000        <1> 	and	edx, 0FFFFh
  6944 00003100 81E1FFFF0000        <1> 	and	ecx, 0FFFFh
  6945 00003106 7537                <1> 	jnz	short transfer_user_fonts_5
  6946                              <1> 
  6947 00003108 09D2                <1> 	or	edx, edx
  6948 0000310A 7531                <1> 	jnz	short transfer_user_fonts_4
  6949 0000310C 09ED                <1> 	or	ebp, ebp
  6950 0000310E 752D                <1> 	jnz	short transfer_user_fonts_4
  6951                              <1> 
  6952                              <1> 	; cx = 0, dx = 0, ebp = 0
  6953                              <1> 	; copy system font to user font
  6954                              <1> 
  6955 00003110 B140                <1> 	mov	cl, 64 ; 64 dwords
  6956                              <1> 	
  6957 00003112 80FF10              <1> 	cmp	bh, 16
  6958 00003115 7417                <1> 	je	short transfer_user_fonts_2
  6959 00003117 80FF08              <1> 	cmp	bh, 8
  6960 0000311A 7406                <1> 	je	short transfer_user_fonts_1
  6961                              <1> 
  6962 0000311C BD[D8550100]        <1> 	mov	ebp, vgafont14
  6963 00003121 C3                  <1> 	retn 
  6964                              <1> 
  6965                              <1> transfer_user_fonts_1:
  6966 00003122 BF00500900          <1> 	mov	edi, VGAFONT8USER
  6967 00003127 BE[D84D0100]        <1> 	mov	esi, vgafont8
  6968 0000312C EB0A                <1> 	jmp	short transfer_user_fonts_3
  6969                              <1> 
  6970                              <1> transfer_user_fonts_2:
  6971 0000312E BF00400900          <1> 	mov	edi, VGAFONT16USER
  6972 00003133 BE[D8630100]        <1> 	mov	esi, vgafont16
  6973                              <1> transfer_user_fonts_3:
  6974 00003138 89FD                <1> 	mov	ebp, edi
  6975 0000313A F3A5                <1> 	rep	movsd
  6976 0000313C C3                  <1> 	retn
  6977                              <1> 
  6978                              <1> transfer_user_fonts_4:
  6979 0000313D F9                  <1> 	stc	
  6980 0000313E C3                  <1> 	retn
  6981                              <1> 	
  6982                              <1> transfer_user_fonts_5:
  6983 0000313F 09ED                <1> 	or	ebp, ebp
  6984 00003141 74FA                <1> 	jz	short transfer_user_fonts_4 ; invalid address !
  6985                              <1> 
  6986 00003143 6681F90001          <1> 	cmp	cx, 256
  6987 00003148 77F3                <1> 	ja	short transfer_user_fonts_4
  6988 0000314A 29D1                <1> 	sub	ecx, edx
  6989 0000314C 76EF                <1> 	jna	short transfer_user_fonts_4
  6990                              <1> 
  6991 0000314E 80FF0E              <1> 	cmp	bh, 14 ; 8x14 font
  6992                              <1> 		       ; (there is not an alternative buffer)
  6993 00003151 7524                <1> 	jne	short transfer_user_fonts_6
  6994                              <1> 	
  6995                              <1> 	; use system's 8x14 font space if permission flag is 1
  6996 00003153 F605[32100300]80    <1> 	test	byte [ufont], 80h
  6997 0000315A 74E1                <1> 	jz	short transfer_user_fonts_4 ; not allowed
  6998                              <1> 
  6999                              <1> 	; permission is given (for vgafont14 location etc.)
  7000                              <1> 	; (for permanent font modification)
  7001                              <1> 	;
  7002                              <1> 	; 19/01/2021
  7003                              <1> 	; Note: Permission flag can be set by 'root' while
  7004                              <1> 	;	system is not in multi tasking/user mode
  7005                              <1> 	;	while [multi_tasking] = 0 and [u.uid] = 0
  7006                              <1> 
  7007                              <1> 	;push	edx	
  7008                              <1> 	; 02/08/2022
  7009 0000315C 87D1                <1> 	xchg	edx, ecx
  7010                              <1> 	;xor	ah, ah
  7011                              <1> 	; 02/08/2022
  7012 0000315E 31C0                <1> 	xor	eax, eax
  7013 00003160 88F8                <1> 	mov	al, bh ; mov al, 14 
  7014                              <1> 	;mul	cx 
  7015                              <1> 	; 02/08/2022
  7016 00003162 F7E2                <1> 	mul	edx  ; char count * 14	
  7017                              <1> 	; 02/08/2022
  7018 00003164 89CA                <1> 	mov	edx, ecx ; ascii code
  7019 00003166 89C1                <1> 	mov	ecx, eax
  7020                              <1> 		; ecx = byte count 
  7021                              <1> 	;pop	edx
  7022                              <1> 	; 02/08/2022
  7023                              <1> 	;xor	eax, eax	
  7024 00003168 30E4                <1> 	xor	ah, ah
  7025 0000316A 88F8                <1> 	mov	al, bh ; mov ax, 14 ; bytes per character
  7026                              <1> 	;mul	dx
  7027                              <1> 	;mov	dx, ax ; char offset
  7028                              <1> 	; 02/08/2022
  7029 0000316C F7E2                <1> 	mul	edx
  7030 0000316E 89C2                <1> 	mov	edx, eax ; char offset
  7031 00003170 BF[D8550100]        <1> 	mov	edi, vgafont14
  7032 00003175 EB48                <1> 	jmp	short transfer_user_fonts_8			
  7033                              <1> transfer_user_fonts_6:
  7034 00003177 80FF08              <1> 	cmp	bh, 8 ; 8x8 font
  7035 0000317A 7520                <1> 	jne	short transfer_user_fonts_7 ; 8x16 font
  7036                              <1> 	;shl	dx, 3 ; * 8
  7037                              <1> 	;shl	cx, 3 ; * 8
  7038                              <1> 	; 02/08/2022
  7039 0000317C C1E203              <1> 	shl	edx, 3 ; byte offset
  7040 0000317F C1E103              <1> 	shl	ecx, 3 ; byte count
  7041                              <1> 	; 09/01/2021
  7042 00003182 BF00500900          <1> 	mov	edi, VGAFONT8USER
  7043 00003187 F605[32100300]08    <1> 	test	byte [ufont], 8  ; already loaded ?	
  7044 0000318E 752F                <1> 	jnz	short transfer_user_fonts_8 ; yes
  7045 00003190 BE[D84D0100]        <1> 	mov	esi, vgafont8
  7046 00003195 E839000000          <1> 	call	transfer_user_fonts_10
  7047 0000319A EB23                <1> 	jmp	short transfer_user_fonts_8
  7048                              <1> transfer_user_fonts_7:
  7049 0000319C 80FF10              <1> 	cmp	bh, 16 ; 8x16 font
  7050 0000319F 759C                <1> 	jne	short transfer_user_fonts_4  ; invalid !
  7051                              <1> 	;shl	dx, 4 ; * 16
  7052                              <1> 	;shl	cx, 4 ; * 16
  7053                              <1> 	; 02/08/2022
  7054 000031A1 C1E204              <1> 	shl	edx, 4 ; byte offset
  7055 000031A4 C1E104              <1> 	shl	ecx, 4 ; byte count
  7056 000031A7 BF00400900          <1>  	mov	edi, VGAFONT16USER
  7057 000031AC F605[32100300]10    <1> 	test	byte [ufont], 16  ; already loaded ?	
  7058 000031B3 750A                <1> 	jnz	short transfer_user_fonts_8 ; yes
  7059 000031B5 BE[D8630100]        <1> 	mov	esi, vgafont16
  7060 000031BA E814000000          <1> 	call	transfer_user_fonts_10
  7061                              <1> transfer_user_fonts_8:
  7062 000031BF 01D7                <1> 	add	edi, edx ; char offset
  7063                              <1> 	; 09/07/2016
  7064                              <1> 	;and	ecx, 0FFFFh
  7065                              <1> 	; ECX = byte count
  7066                              <1> 	;push	ecx
  7067 000031C1 89EE                <1> 	mov	esi, ebp ; user's font buffer
  7068                              <1> 	; 09/01/2021
  7069 000031C3 89FD                <1> 	mov	ebp, edi ; system addr for user's font
  7070                              <1> 	; 05/01/2021
  7071                              <1> 	;mov	edi, Cluster_Buffer  ; system buffer
  7072 000031C5 E829DC0000          <1> 	call	transfer_from_user_buffer
  7073                              <1> 	;pop	ecx
  7074                              <1> 	; ecx = transfer (byte) count = character count
  7075 000031CA 7206                <1> 	jc	short transfer_user_fonts_9
  7076                              <1> 	; 05/01/2021
  7077                              <1> 	;mov	ebp, Cluster_Buffer
  7078                              <1> 	
  7079 000031CC 083D[32100300]      <1> 	or	byte [ufont], bh 
  7080                              <1> 			; 8x8 or 8x16 user font ready 
  7081                              <1> transfer_user_fonts_9:
  7082 000031D2 C3                  <1> 	retn
  7083                              <1> 
  7084                              <1> transfer_user_fonts_10:
  7085                              <1> 	; 02/08/2022
  7086                              <1> 	; 09/01/2021
  7087 000031D3 56                  <1> 	push	esi
  7088 000031D4 57                  <1> 	push	edi
  7089 000031D5 51                  <1> 	push	ecx
  7090                              <1> 	;mov	cx, 64
  7091                              <1> 	; 02/08/2022
  7092 000031D6 31C9                <1> 	xor	ecx, ecx
  7093 000031D8 B140                <1> 	mov	cl, 64
  7094 000031DA F3A5                <1> 	rep	movsd
  7095 000031DC 59                  <1> 	pop	ecx
  7096 000031DD 5F                  <1> 	pop	edi
  7097 000031DE 5E                  <1> 	pop	esi
  7098 000031DF C3                  <1> 	retn
  7099                              <1> 
  7100                              <1> load_text_user_pat:
  7101                              <1> 	; 02/08/2022 (TRDOS 3386 v2.0.5)
  7102                              <1> 	; 26/07/2016
  7103                              <1> 	; 09/07/2016
  7104                              <1> 	; load user defined (EGA/VGA) text fonts
  7105                              <1> 	;
  7106                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  7107                              <1> 	; vgabios-0.7a (2011)
  7108                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  7109                              <1> 	; 'vgabios.c', 'biosfn_load_text_user_pat'
  7110                              <1> 
  7111                              <1> 	; biosfn_load_text_user_pat (AL,ES,BP,CX,DX,BL,BH)
  7112                              <1> 
  7113                              <1> 	; get_font_access();
  7114                              <1> 	; blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
  7115                              <1> 	; for(i=0;i<CX;i++)
  7116                              <1> 	; {
  7117                              <1> 	;  src = BP + i * BH;
  7118                              <1> 	;  dest = blockaddr + (DX + i) * 32;
  7119                              <1> 	;  memcpyb(0xA000, dest, ES, src, BH);
  7120                              <1> 	; }
  7121                              <1> 	; release_font_access();
  7122                              <1> 	; if(AL>=0x10)
  7123                              <1> 	; {
  7124                              <1> 	; set_scan_lines(BH);
  7125                              <1> 	; }
  7126                              <1> 
  7127 000031E0 50                  <1> 	push	eax
  7128 000031E1 E839000000          <1> 	call	get_font_access
  7129 000031E6 28DB                <1> 	sub	bl, bl ; i = 0
  7130                              <1> 	; 02/08/2022
  7131                              <1> 	; ecx <= 256
  7132 000031E8 30ED                <1> 	xor	ch, ch
  7133                              <1> ltup_1:
  7134 000031EA 88D8                <1> 	mov	al, bl
  7135 000031EC F6E7                <1> 	mul	bh	
  7136                              <1> 	;movzx	esi, ax
  7137                              <1> 	; 02/08/2022
  7138 000031EE 89C6                <1> 	mov	esi, eax
  7139 000031F0 01EE                <1> 	add	esi, ebp
  7140 000031F2 88D8                <1> 	mov	al, bl
  7141 000031F4 28E4                <1> 	sub	ah, ah
  7142                              <1> 	;add	ax, dx ; (DX + i)
  7143                              <1> 	;shl	ax, 5  ; * 32
  7144                              <1> 	; 02/08/2022
  7145 000031F6 01D0                <1> 	add	eax, edx
  7146 000031F8 C1E005              <1> 	shl	eax, 5
  7147                              <1> 	;movzx	edi, ax
  7148                              <1> 	; 02/08/2022
  7149 000031FB 89C7                <1> 	mov	edi, eax
  7150 000031FD 81C700000A00        <1> 	add	edi, 0A0000h
  7151 00003203 51                  <1> 	push	ecx
  7152                              <1> 	;movzx	ecx, bh
  7153                              <1> 	; 02/08/2022
  7154 00003204 88F9                <1> 	mov	cl, bh
  7155 00003206 F3A4                <1> 	rep	movsb
  7156 00003208 59                  <1> 	pop	ecx
  7157 00003209 FEC3                <1> 	inc	bl
  7158 0000320B 38CB                <1> 	cmp	bl, cl
  7159 0000320D 75DB                <1> 	jne	short ltup_1
  7160                              <1> 	;
  7161 0000320F E83E000000          <1> 	call	release_font_access
  7162                              <1> 	;
  7163 00003214 58                  <1> 	pop	eax
  7164                              <1> 	; if(AL>=0x10)
  7165 00003215 3C10                <1> 	cmp	al, 10h
  7166 00003217 7205                <1> 	jb	short ltup_2
  7167                              <1>    	; set_scan_lines(BH);
  7168 00003219 E86F000000          <1> 	call	set_scan_lines
  7169                              <1> ltup_2:
  7170 0000321E C3                  <1> 	retn
  7171                              <1> 
  7172                              <1> get_font_access:
  7173                              <1> 	; 02/08/2022
  7174                              <1> 	; 09/07/2016
  7175                              <1> 	;
  7176                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  7177                              <1> 	; vgabios-0.7a (2011)
  7178                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  7179                              <1> 	; 'vgabios.c', 'get_font_access'
  7180                              <1> 
  7181                              <1> 	; get_font_access()
  7182 0000321F 52                  <1> 	push	edx
  7183 00003220 66BAC403            <1> 	mov	dx, 3C4h ; VGAREG_SEQU_ADDRESS
  7184                              <1> 	; 02/08/2022
  7185 00003224 31C0                <1>  	xor	eax, eax
  7186                              <1> 	;mov	ax, 0100h
  7187 00003226 B401                <1> 	mov	ah, 1
  7188                              <1> 	; ax = 0100h
  7189 00003228 66EF                <1> 	out	dx, ax
  7190 0000322A 66B80204            <1> 	mov	ax, 0402h
  7191 0000322E 66EF                <1> 	out	dx, ax
  7192 00003230 66B80407            <1> 	mov	ax, 0704h
  7193 00003234 66EF                <1> 	out	dx, ax
  7194 00003236 66B80003            <1> 	mov	ax, 0300h
  7195 0000323A 66EF                <1> 	out	dx, ax
  7196                              <1> 	;mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  7197                              <1> 	; 02/08/2022
  7198 0000323C B2CE                <1> 	mov	dl, 0CEh
  7199 0000323E 66B80402            <1> 	mov	ax, 0204h
  7200 00003242 66EF                <1> 	out	dx, ax
  7201 00003244 66B80500            <1> 	mov	ax, 0005h
  7202 00003248 66EF                <1> 	out	dx, ax
  7203 0000324A 66B80604            <1> 	mov	ax, 0406h
  7204 0000324E 66EF                <1> 	out	dx, ax
  7205 00003250 5A                  <1> 	pop	edx
  7206 00003251 C3                  <1> 	retn
  7207                              <1> 
  7208                              <1> release_font_access:
  7209                              <1> 	; 02/08/2022
  7210                              <1> 	; 29/07/2016
  7211                              <1> 	; 09/07/2016
  7212                              <1> 	;
  7213                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  7214                              <1> 	; vgabios-0.7a (2011)
  7215                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  7216                              <1> 	; 'vgabios.c', 'release_font_access'
  7217                              <1> 
  7218 00003252 66BAC403            <1> 	mov	dx, 3C4h ; VGAREG_SEQU_ADDRESS
  7219                              <1> 	;mov	ax, 0100h
  7220                              <1> 	; 02/08/2022
  7221 00003256 29C0                <1> 	sub	eax, eax
  7222 00003258 B401                <1> 	mov	ah, 1
  7223                              <1> 	; ax = 0100h
  7224 0000325A 66EF                <1> 	out	dx, ax
  7225 0000325C 66B80203            <1> 	mov	ax, 0302h
  7226 00003260 66EF                <1> 	out	dx, ax
  7227 00003262 66B80403            <1> 	mov	ax, 0304h
  7228 00003266 66EF                <1> 	out	dx, ax
  7229 00003268 66B80003            <1> 	mov	ax, 0300h
  7230 0000326C 66EF                <1> 	out	dx, ax
  7231                              <1> 	;mov	dx, 3CCh ; VGAREG_READ_MISC_OUTPUT
  7232                              <1>  	; 02/08/2022
  7233 0000326E B2CC                <1> 	mov	dl, 0CCh
  7234 00003270 EC                  <1> 	in	al, dx
  7235 00003271 2401                <1> 	and	al, 01h
  7236 00003273 C0E002              <1> 	shl	al, 2
  7237 00003276 0C0A                <1> 	or	al, 0Ah
  7238 00003278 88C4                <1> 	mov	ah, al
  7239 0000327A B006                <1> 	mov	al, 06h
  7240                              <1> 	;mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
  7241                              <1> 	; 02/08/2022
  7242 0000327C B2CE                <1> 	mov	dl, 0CEh
  7243 0000327E 66EF                <1> 	out	dx, ax
  7244 00003280 66B80400            <1> 	mov	ax, 0004h
  7245 00003284 66EF                <1> 	out	dx, ax
  7246 00003286 66B80510            <1> 	mov	ax, 1005h
  7247 0000328A 66EF                <1> 	out	dx, ax
  7248 0000328C C3                  <1> 	retn
  7249                              <1> 
  7250                              <1> set_scan_lines:
  7251                              <1> 	; 02/08/2022
  7252                              <1> 	; 09/07/2016
  7253                              <1> 	;
  7254                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  7255                              <1> 	; vgabios-0.7a (2011)
  7256                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  7257                              <1> 	; 'vgabios.c', 'set_scan_lines'
  7258                              <1> 
  7259                              <1> 	; set_scan_lines(lines)
  7260                              <1> 	; BH = lines
  7261                              <1> 
  7262                              <1> 	; outb(crtc_addr, 0x09);
  7263 0000328D 66BAD403            <1> 	mov	dx, 3D4h ; CRTC_ADDRESS = 3D4h (always)
  7264 00003291 B009                <1> 	mov	al, 09h
  7265 00003293 EE                  <1> 	out	dx, al
  7266                              <1> 	; crtc_r9 = inb(crtc_addr+1);
  7267                              <1> 	;inc	dx ; 3D5h
  7268                              <1> 	; 02/08/2022
  7269 00003294 FEC2                <1> 	inc	dl
  7270 00003296 EC                  <1> 	in	al, dx
  7271                              <1> 	; crtc_r9 = (crtc_r9 & 0xe0) | (lines - 1);
  7272 00003297 24E0                <1> 	and	al, 0E0h
  7273 00003299 FECF                <1> 	dec	bh ; lines - 1
  7274 0000329B 08F8                <1> 	or	al, bh
  7275                              <1> 	; outb(crtc_addr+1, crtc_r9);
  7276 0000329D EE                  <1> 	out	dx, al
  7277                              <1> 	;inc	bh 
  7278                              <1> 	; if(lines==8)
  7279                              <1> 	;cmp	bh, 8
  7280 0000329E 80FF07              <1> 	cmp	bh, 7
  7281 000032A1 7506                <1> 	jne	short ssl_1
  7282                              <1> 	; biosfn_set_cursor_shape(0x06,0x07);
  7283 000032A3 66B90706            <1> 	mov	cx, 0607h
  7284 000032A7 EB06                <1> 	jmp	short ssl_2
  7285                              <1> ssl_1:
  7286                              <1> 	; biosfn_set_cursor_shape(lines-4,lines-3);
  7287 000032A9 88F9                <1> 	mov	cl, bh ; lines - 1
  7288 000032AB 88CD                <1> 	mov	ch, cl ; lines - 1 (16 -> 15)
  7289 000032AD FECD                <1> 	dec	ch  ; lines - 2 (16 -> 14)
  7290                              <1> ssl_2:
  7291                              <1> 	; CH = start line, CL = stop line
  7292 000032AF B40A                <1> 	mov	ah, 10	; 6845 register for cursor set
  7293 000032B1 66890D[37670000]    <1> 	mov	[CURSOR_MODE], cx ; save in data area
  7294 000032B8 E877F0FFFF          <1> 	call	m16	; output cx register
  7295                              <1> 	; write_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT, lines);
  7296 000032BD FEC7                <1> 	inc	bh ; lines
  7297 000032BF 883D[22670000]      <1> 	mov	[CHAR_HEIGHT], bh
  7298                              <1> 	;  outb(crtc_addr, 0x12);
  7299 000032C5 66BAD403            <1> 	mov	dx, 3D4h ; CRTC_ADDRESS
  7300 000032C9 B012                <1> 	mov	al, 12h
  7301 000032CB EE                  <1> 	out	dx, al
  7302                              <1> 	; vde = inb(crtc_addr+1);
  7303                              <1> 	;inc	dx
  7304                              <1> 	; 02/08/2022
  7305 000032CC FEC2                <1> 	inc	dl
  7306 000032CE EC                  <1> 	in	al, dx
  7307 000032CF 88C4                <1> 	mov	ah, al
  7308                              <1> 	; outb(crtc_addr, 0x07);
  7309                              <1> 	;dec	dx
  7310                              <1> 	; 02/08/2022
  7311 000032D1 FECA                <1> 	dec	dl
  7312 000032D3 B007                <1> 	mov	al, 07h
  7313 000032D5 EE                  <1> 	out	dx, al
  7314                              <1> 	; ovl = inb(crtc_addr+1);
  7315                              <1> 	;inc	dx
  7316                              <1> 	; 02/08/2022
  7317 000032D6 FEC2                <1> 	inc	dl
  7318 000032D8 EC                  <1> 	in	al, dx
  7319                              <1> 	; vde += (((ovl & 0x02) << 7) + ((ovl & 0x40) << 3) + 1);
  7320 000032D9 88E2                <1> 	mov	dl, ah ; vde
  7321 000032DB 88C6                <1> 	mov	dh, al ; ovl
  7322                              <1> 	;and	ax, 02h
  7323                              <1> 	;shl	ax, 7
  7324                              <1> 	; 02/08/2022
  7325 000032DD 31C0                <1> 	xor	eax, eax
  7326 000032DF 88F0                <1> 	mov	al, dh
  7327 000032E1 2402                <1> 	and	al, 2
  7328 000032E3 C1E007              <1> 	shl	eax, 7
  7329                              <1> 	;mov	cx, ax ; (ovl & 0x02) << 7)	
  7330                              <1> 	; 02/08/2022
  7331 000032E6 89C1                <1> 	mov	ecx, eax
  7332 000032E8 28E4                <1> 	sub	ah, ah
  7333 000032EA 88F0                <1> 	mov	al, dh ; ovl
  7334                              <1> 	;and	ax, 40h			
  7335                              <1> 	;shl	ax, 3  ; (ovl & 0x40) << 3)
  7336                              <1> 	;inc	ax ; + 1 
  7337                              <1> 	;add	ax, cx
  7338                              <1> 	; 02/08/2022	
  7339 000032EC 2440                <1> 	and	al, 40h
  7340 000032EE C1E003              <1> 	shl	eax, 3
  7341 000032F1 40                  <1> 	inc	eax
  7342 000032F2 01C8                <1> 	add	eax, ecx
  7343 000032F4 30F6                <1> 	xor	dh, dh
  7344                              <1> 	;add	ax, dx ; + vde
  7345                              <1> 	; 02/08/2022
  7346 000032F6 01D0                <1> 	add	eax, edx
  7347                              <1> 	; rows = vde / lines;
  7348 000032F8 F6F7                <1> 	div	bh
  7349                              <1> 	;dec	al ; rows -1
  7350                              <1> 	; write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, rows-1);
  7351 000032FA A2[26670000]        <1> 	mov	[VGA_ROWS], al ; rows (not 'rows-1' !)
  7352                              <1> 	; write_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE, rows * cols * 2);
  7353                              <1> 	;mov	ah, [CRT_COLS]
  7354                              <1> 	;mul	ah
  7355                              <1> 	; 17/11/2020
  7356 000032FF F625[20670000]      <1> 	mul	byte [CRT_COLS]
  7357                              <1> 	;shl	ax, 1
  7358                              <1> 	; 02/08/2022
  7359 00003305 D1E0                <1> 	shl	eax, 1
  7360 00003307 66A3[DC830100]      <1> 	mov 	[CRT_LEN], ax	
  7361 0000330D C3                  <1> 	retn
  7362                              <1> 
  7363                              <1> load_text_8_14_pat:
  7364                              <1> 	; 02/08/2022 (TRDOS 3386 v2.0.5)
  7365                              <1> 	; 26/07/2016
  7366                              <1> 	; 25/07/2016
  7367                              <1> 	; 23/07/2016
  7368                              <1> 	; 09/07/2016
  7369                              <1> 	; load user defined (EGA/VGA) text fonts
  7370                              <1> 	;
  7371                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  7372                              <1> 	; vgabios-0.7a (2011)
  7373                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  7374                              <1> 	; 'vgabios.c', 'biosfn_load_text_8_14_pat'
  7375                              <1> 
  7376                              <1> 	; biosfn_load_text_8_14_pat (AL,BL)
  7377                              <1> 
  7378                              <1> 	; get_font_access();
  7379                              <1> 	; blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
  7380                              <1> 	; for(i=0;i<0x100;i++)
  7381                              <1> 	; {
  7382                              <1> 	;  src = i * 14;
  7383                              <1> 	;  dest = blockaddr + i * 32;
  7384                              <1> 	;  memcpyb(0xA000, dest, 0xC000, vgafont14+src, 14);
  7385                              <1> 	; }
  7386                              <1> 	; release_font_access();
  7387                              <1> 	; if(AL>=0x10)
  7388                              <1> 	; {
  7389                              <1> 	; set_scan_lines(14);
  7390                              <1> 	; }
  7391                              <1> 
  7392 0000330E 50                  <1> 	push	eax
  7393 0000330F E80BFFFFFF          <1> 	call	get_font_access
  7394                              <1> 
  7395                              <1> 	; blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
  7396                              <1> 	;mov	dl, bl
  7397                              <1> 	;and	dl, 3
  7398                              <1> 	;shl	dx, 14
  7399                              <1> 	;xchg	dx, bx
  7400                              <1> 	;and	dl, 4
  7401                              <1> 	;shl	dx, 11
  7402                              <1> 	;add	dx, bx 	
  7403                              <1>  
  7404                              <1> 	;xor	dx, dx  ; blockaddr = 0
  7405                              <1> 	; Always block 0 for TRDOS 386 ! (blockaddr=0)
  7406                              <1> 
  7407 00003314 28DB                <1> 	sub	bl, bl ; i = 0
  7408 00003316 B70E                <1> 	mov	bh, 14
  7409 00003318 BE[D8550100]        <1> 	mov	esi, vgafont14
  7410 0000331D BF00000A00          <1> 	mov	edi, 0A0000h
  7411                              <1> 	; 02/08/2022
  7412 00003322 29C9                <1> 	sub	ecx, ecx		
  7413                              <1> lt8_14_1:
  7414                              <1> 	;mov	al, bl
  7415                              <1> 	;mul	bh
  7416                              <1> 	;movzx	esi, ax
  7417                              <1> 	;add	esi, vgafont14
  7418                              <1> 	;mov	al, bl
  7419                              <1> 	;sub	ah, ah
  7420                              <1> 	;shl	ax, 5 ; * 32
  7421                              <1> 	;;add	ax, dx ; blockaddr + i * 32;
  7422                              <1> 	;movzx	edi, ax ; dest
  7423                              <1> 	;add	edi, 0A0000h
  7424                              <1> 	;02/08/2022
  7425                              <1> 	;movzx	ecx, bh
  7426 00003324 88F9                <1> 	mov	cl, bh
  7427 00003326 F3A4                <1> 	rep	movsb
  7428 00003328 83C712              <1> 	add	edi, 18 ; 32 - 14
  7429 0000332B FEC3                <1> 	inc	bl
  7430 0000332D 75F5                <1> 	jnz	short lt8_14_1	
  7431                              <1> 	;
  7432 0000332F E81EFFFFFF          <1> 	call	release_font_access
  7433                              <1> 	;
  7434 00003334 58                  <1> 	pop	eax
  7435                              <1> 	; if(AL>=0x10)
  7436 00003335 3C10                <1> 	cmp	al, 10h
  7437 00003337 7205                <1> 	jb	short lt8_14_4
  7438                              <1> 	; BH = 14
  7439                              <1>    	; set_scan_lines(14);
  7440 00003339 E84FFFFFFF          <1> 	call	set_scan_lines
  7441                              <1> lt8_14_4:
  7442 0000333E C3                  <1> 	retn
  7443                              <1> 
  7444                              <1> load_text_8_8_pat:
  7445                              <1> 	; 02/08/2022 (TRDOS 3386 v2.0.5)
  7446                              <1> 	; 05/01/2021 (TRDOS 386 v2.0.3)
  7447                              <1> 	; 26/07/2016
  7448                              <1> 	; 25/07/2016
  7449                              <1> 	; 23/07/2016
  7450                              <1> 	; 09/07/2016
  7451                              <1> 	; load user defined (EGA/VGA) text fonts
  7452                              <1> 	;
  7453                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  7454                              <1> 	; vgabios-0.7a (2011)
  7455                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  7456                              <1> 	; 'vgabios.c', 'biosfn_load_text_8_8_pat'
  7457                              <1> 
  7458                              <1> 	; biosfn_load_text_8_8_pat (AL,BL)
  7459                              <1> 
  7460                              <1> 	; get_font_access();
  7461                              <1> 	; blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
  7462                              <1> 	; for(i=0;i<0x100;i++)
  7463                              <1> 	; {
  7464                              <1> 	;  src = i * 8;
  7465                              <1> 	;  dest = blockaddr + i * 32;
  7466                              <1> 	;  memcpyb(0xA000, dest, 0xC000, vgafont8+src, 8);
  7467                              <1> 	; }
  7468                              <1> 	; release_font_access();
  7469                              <1> 	; if(AL>=0x10)
  7470                              <1> 	; {
  7471                              <1> 	; set_scan_lines(8);
  7472                              <1> 	; }
  7473                              <1> 
  7474 0000333F 50                  <1> 	push	eax
  7475 00003340 E8DAFEFFFF          <1> 	call	get_font_access
  7476                              <1> 
  7477                              <1> 	; blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
  7478                              <1> 	;mov	dl, bl
  7479                              <1> 	;and	dl, 3
  7480                              <1> 	;shl	dx, 14
  7481                              <1> 	;xchg	dx, bx
  7482                              <1> 	;and	dl, 4
  7483                              <1> 	;shl	dx, 11
  7484                              <1> 	;add	dx, bx 	
  7485                              <1>  
  7486                              <1> 	;xor	dx, dx  ; blockaddr = 0
  7487                              <1> 	; Always block 0 for TRDOS 386 ! (blockaddr=0)
  7488                              <1> 
  7489 00003345 28DB                <1> 	sub	bl, bl ; i = 0
  7490 00003347 B708                <1> 	mov	bh, 8
  7491                              <1> 	;mov	esi, vgafont8
  7492 00003349 BF00000A00          <1> 	mov	edi, 0A0000h
  7493                              <1> 
  7494                              <1> 	; 02/08/2022
  7495 0000334E 29C9                <1> 	sub	ecx, ecx
  7496                              <1> 
  7497                              <1> 	; 05/01/2021
  7498 00003350 F605[32100300]80    <1> 	test	byte [ufont], 80h
  7499 00003357 7410                <1> 	jz	short lt8_8_0
  7500                              <1> 		; user font permission (after set mode)
  7501 00003359 F605[32100300]08    <1>  	test	byte [ufont], 8
  7502 00003360 7407                <1> 	jz	short lt8_8_0
  7503 00003362 BE00500900          <1> 	mov	esi, VGAFONT8USER
  7504 00003367 EB05                <1> 	jmp	short lt8_8_1
  7505                              <1> lt8_8_0:
  7506 00003369 BE[D84D0100]        <1> 	mov	esi, vgafont8	
  7507                              <1> lt8_8_1:
  7508                              <1> 	;mov	al, bl
  7509                              <1> 	;mul	bh
  7510                              <1> 	;movzx	esi, ax
  7511                              <1> 	;add	esi, vgafont8
  7512                              <1> 	;mov	al, bl
  7513                              <1> 	;sub	ah, ah
  7514                              <1> 	;shl	ax, 5 ; * 32
  7515                              <1> 	;;add	ax, dx ; blockaddr + i * 32;
  7516                              <1> 	;movzx	edi, ax ; dest
  7517                              <1> 	;add	edi, 0A0000h
  7518                              <1> 	; 02/08/2022
  7519                              <1> 	;movzx	ecx, bh 		
  7520 0000336E 88F9                <1> 	mov	cl, bh
  7521 00003370 F3A4                <1> 	rep	movsb
  7522 00003372 83C718              <1> 	add	edi, 24 ; 32 - 8
  7523 00003375 FEC3                <1> 	inc	bl
  7524 00003377 75F5                <1> 	jnz	short lt8_8_1
  7525                              <1> 	;
  7526 00003379 E8D4FEFFFF          <1> 	call	release_font_access
  7527                              <1> 	;
  7528 0000337E 58                  <1> 	pop	eax
  7529                              <1> 	; if(AL>=0x10)
  7530 0000337F 3C10                <1> 	cmp	al, 10h
  7531 00003381 7205                <1> 	jb	short lt8_8_2
  7532                              <1> 	; BH = 8
  7533                              <1>    	; set_scan_lines(8);
  7534 00003383 E805FFFFFF          <1> 	call	set_scan_lines
  7535                              <1> lt8_8_2:
  7536 00003388 C3                  <1> 	retn
  7537                              <1> 
  7538                              <1> load_text_8_16_pat:
  7539                              <1> 	; 02/08/2022 (TRDOS 3386 v2.0.5)
  7540                              <1> 	; 05/01/2021 (TRDOS 386 v2.0.3)
  7541                              <1> 	; 26/07/2016
  7542                              <1> 	; 25/07/2016
  7543                              <1> 	; 23/07/2016
  7544                              <1> 	; 09/07/2016
  7545                              <1> 	; load user defined (EGA/VGA) text fonts
  7546                              <1> 	;
  7547                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  7548                              <1> 	; vgabios-0.7a (2011)
  7549                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  7550                              <1> 	; 'vgabios.c', 'biosfn_load_text_8_16_pat'
  7551                              <1> 
  7552                              <1> 	; biosfn_load_text_8_16_pat (AL,BL)
  7553                              <1> 
  7554                              <1> 	; get_font_access();
  7555                              <1> 	; blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
  7556                              <1> 	; for(i=0;i<0x100;i++)
  7557                              <1> 	; {
  7558                              <1> 	;  src = i * 16;
  7559                              <1> 	;  dest = blockaddr + i * 32;
  7560                              <1> 	;  memcpyb(0xA000, dest, 0xC000, vgafont16+src, 16);
  7561                              <1> 	; }
  7562                              <1> 	; release_font_access();
  7563                              <1> 	; if(AL>=0x10)
  7564                              <1> 	; {
  7565                              <1> 	; set_scan_lines(16);
  7566                              <1> 	; }
  7567                              <1> 
  7568 00003389 50                  <1> 	push	eax
  7569 0000338A E890FEFFFF          <1> 	call	get_font_access
  7570                              <1> 
  7571                              <1> 	; blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11);
  7572                              <1> 	;mov	dl, bl
  7573                              <1> 	;and	dl, 3
  7574                              <1> 	;shl	dx, 14
  7575                              <1> 	;xchg	dx, bx
  7576                              <1> 	;and	dl, 4
  7577                              <1> 	;shl	dx, 11
  7578                              <1> 	;add	dx, bx 	
  7579                              <1>  
  7580                              <1> 	;xor	dx, dx  ; blockaddr = 0
  7581                              <1> 	; Always block 0 for TRDOS 386 ! (blockaddr=0)
  7582                              <1> 
  7583 0000338F 28DB                <1> 	sub	bl, bl ; i = 0
  7584 00003391 B710                <1> 	mov	bh, 16
  7585                              <1> 	;mov	esi, vgafont16
  7586 00003393 BF00000A00          <1> 	mov	edi, 0A0000h
  7587                              <1> 	;movzx	eax, bh
  7588                              <1> 	; 02/08/2022
  7589 00003398 29C0                <1> 	sub	eax, eax
  7590 0000339A 88F8                <1> 	mov	al, bh
  7591                              <1> 
  7592                              <1> 	; 05/01/2021
  7593 0000339C F605[32100300]80    <1> 	test	byte [ufont], 80h
  7594 000033A3 7410                <1> 	jz	short lt8_16_0
  7595                              <1> 		; user font permission (after set mode)
  7596 000033A5 F605[32100300]10    <1>  	test	byte [ufont], 16
  7597 000033AC 7407                <1> 	jz	short lt8_16_0
  7598 000033AE BE00400900          <1> 	mov	esi, VGAFONT16USER
  7599 000033B3 EB05                <1> 	jmp	short lt8_16_1
  7600                              <1> lt8_16_0:
  7601 000033B5 BE[D8630100]        <1> 	mov	esi, vgafont16
  7602                              <1> lt8_16_1:
  7603                              <1> 	;mov	al, bl
  7604                              <1> 	;mul	bh
  7605                              <1> 	;movzx	esi, ax
  7606                              <1> 	;add	esi, vgafont16
  7607                              <1> 	;mov	al, bl ; i
  7608                              <1> 	;sub	ah, ah
  7609                              <1> 	;shl	ax, 5 ; * 32
  7610                              <1> 	;;add	ax, dx ; blockaddr + i * 32;
  7611                              <1> 	;movzx	edi, ax ; dest
  7612                              <1> 	;add	edi, 0A0000h
  7613                              <1> 	;movzx	ecx, bh
  7614 000033BA 89C1                <1> 	mov	ecx, eax ; 16	
  7615 000033BC F3A4                <1> 	rep	movsb
  7616 000033BE 01C7                <1> 	add	edi, eax ; add edi, 16
  7617 000033C0 FEC3                <1> 	inc	bl
  7618 000033C2 75F6                <1> 	jnz	short lt8_16_1
  7619                              <1> 	;
  7620 000033C4 E889FEFFFF          <1> 	call	release_font_access
  7621                              <1> 	;
  7622 000033C9 58                  <1> 	pop	eax
  7623                              <1> 	; if(AL>=0x10)
  7624 000033CA 3C10                <1> 	cmp	al, 10h
  7625 000033CC 7205                <1> 	jb	short lt8_16_2
  7626                              <1> 	; BH = 16
  7627                              <1>    	; set_scan_lines(16);
  7628 000033CE E8BAFEFFFF          <1> 	call	set_scan_lines
  7629                              <1> lt8_16_2:
  7630 000033D3 C3                  <1> 	retn
  7631                              <1> 
  7632                              <1> load_gfx_user_chars:
  7633                              <1> 	; 08/01/2021
  7634                              <1> 	; 05/01/2021 (TRDOS 386 v2.0.3)
  7635                              <1> 	; 08/08/2016
  7636                              <1> 	; 10/07/2016
  7637                              <1> 	; Setup User-Defined Font for Graphics Mode (VGA)
  7638                              <1> 	;
  7639                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  7640                              <1> 	; vgabios-0.7a (2011)
  7641                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  7642                              <1> 	; 'vgabios.c', 'biosfn_load_gfx_user_chars'
  7643                              <1> 
  7644                              <1> 	; biosfn_load_gfx_user_chars (ES,BP,CX,BL,DL)
  7645                              <1> 	; /* set 0x43 INT pointer */
  7646                              <1>     	; write_word(0x0, 0x43*4, BP);
  7647                              <1>     	; write_word(0x0, 0x43*4+2, ES);
  7648                              <1> 	
  7649                              <1> 	; 08/01/2021
  7650                              <1> 		
  7651                              <1> 	; BL   screen rows code: 00H = user-specified (in DL)
  7652                              <1>         ;                        01H = 14 rows
  7653                              <1>         ;                        02H = 25 rows
  7654                              <1>         ;                        03H = 43 rows
  7655                              <1>         ; CX   bytes per character definition
  7656                              <1>         ; DL   (when BL=0) custom number of character rows on screen
  7657                              <1>         ; EBP  address of font-definition information (user's mem space)
  7658                              <1> 
  7659                              <1> 	; 05/01/2021
  7660                              <1> 	;xor	eax, eax
  7661                              <1> 	;dec	eax ; 0FFFFFFFFh (user defined fonts)
  7662                              <1> 	;mov	[VGA_INT43H], eax
  7663                              <1> 
  7664                              <1> 	; 08/01/2021
  7665                              <1> 	; ebp = video font data (buffer) address
  7666 000033D4 892D[EE830100]      <1> 	mov	[VGA_INT43H], ebp
  7667                              <1> 
  7668                              <1> 	; switch (BL) {
  7669                              <1> 	; case 0:
  7670                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, DL-1);
  7671                              <1> 	;    break;
  7672 000033DA 20DB                <1> 	and	bl, bl
  7673 000033DC 7508                <1> 	jnz	short l_gfx_uc_1
  7674 000033DE 8815[26670000]      <1> 	mov	[VGA_ROWS], dl  ; not DL-1 !
  7675 000033E4 EB23                <1> 	jmp	short l_gfx_uc_4
  7676                              <1> l_gfx_uc_1:
  7677                              <1> 	; case 1:
  7678                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, 13);
  7679                              <1> 	;    break;
  7680 000033E6 FECB                <1> 	dec	bl
  7681 000033E8 7509                <1> 	jnz	short l_gfx_uc_2
  7682                              <1> 	; bl = 1
  7683 000033EA C605[26670000]0E    <1> 	mov	byte [VGA_ROWS], 14  ; not 13 !
  7684 000033F1 EB16                <1> 	jmp	short l_gfx_uc_4
  7685                              <1> l_gfx_uc_2:
  7686 000033F3 FECB                <1> 	dec	bl
  7687 000033F5 740B                <1> 	jz	short l_gfx_uc_3 ; bl = 2
  7688 000033F7 FECB                <1> 	dec	bl
  7689 000033F9 750E                <1> 	jnz	short l_gfx_uc_4 ; bl > 3
  7690                              <1> 	; bl = 3
  7691                              <1> 	; case 3:
  7692                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, 42);
  7693                              <1> 	;    break;
  7694 000033FB C605[26670000]2B    <1> 	mov	byte [VGA_ROWS], 43  ; not 42 !
  7695                              <1> l_gfx_uc_3:
  7696                              <1>     	; case 2:
  7697                              <1>     	; default:
  7698                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, 24);
  7699                              <1> 	;    break;
  7700                              <1> 	; bl = 2 or bl > 3
  7701 00003402 C605[26670000]19    <1> 	mov	byte [VGA_ROWS], 25  ; not 24 !	
  7702                              <1>     	; }
  7703                              <1> l_gfx_uc_4:
  7704                              <1>     	; write_byte(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT, CX);
  7705 00003409 880D[22670000]      <1> 	mov	[CHAR_HEIGHT], cl
  7706                              <1> 	; }
  7707 0000340F C3                  <1> 	retn
  7708                              <1> 
  7709                              <1> load_gfx_8_14_chars:
  7710                              <1> 	; 08/08/2016
  7711                              <1> 	; 10/07/2016
  7712                              <1> 	; Setup ROM 8x14 Font for Graphics Mode (VGA)
  7713                              <1> 	;
  7714                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  7715                              <1> 	; vgabios-0.7a (2011)
  7716                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  7717                              <1> 	; 'vgabios.c', 'biosfn_load_gfx_8_14_chars'
  7718                              <1> 
  7719                              <1> 	; biosfn_load_gfx_8_14_chars (BL)
  7720                              <1> 	; /* set 0x43 INT pointer */
  7721                              <1>     	; write_word(0x0, 0x43*4, &vgafont14);
  7722                              <1>     	; write_word(0x0, 0x43*4+2, 0xC000);
  7723 00003410 C705[EE830100]-     <1> 	mov	dword [VGA_INT43H], vgafont14
  7723 00003416 [D8550100]          <1>
  7724                              <1> 		
  7725                              <1> 	; BL    screen rows code: 00H = user-specified (in DL)
  7726                              <1>         ;                         01H = 14 rows
  7727                              <1>         ;                         02H = 25 rows
  7728                              <1>         ;                         03H = 43 rows
  7729                              <1>         ; DL    (when BL=0) custom number of char rows on screen
  7730                              <1> 
  7731                              <1> 	; switch (BL) {
  7732                              <1> 	; case 0:
  7733                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, DL-1);
  7734                              <1> 	;    break;
  7735 0000341A 20DB                <1> 	and	bl, bl
  7736 0000341C 7508                <1> 	jnz	short l_gfx_8_14c_1
  7737 0000341E 8815[26670000]      <1> 	mov	[VGA_ROWS], dl  ; not DL-1 !
  7738 00003424 EB23                <1> 	jmp	short l_gfx_8_14c_4
  7739                              <1> l_gfx_8_14c_1:
  7740                              <1> 	; case 1:
  7741                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, 13);
  7742                              <1> 	;    break;
  7743 00003426 FECB                <1> 	dec	bl
  7744 00003428 7509                <1> 	jnz	short l_gfx_8_14c_2
  7745                              <1> 	; bl = 1
  7746 0000342A C605[26670000]0E    <1> 	mov	byte [VGA_ROWS], 14  ; not 13 !
  7747 00003431 EB16                <1> 	jmp	short l_gfx_8_14c_4
  7748                              <1> l_gfx_8_14c_2:
  7749 00003433 FECB                <1> 	dec	bl
  7750 00003435 740B                <1> 	jz	short l_gfx_8_14c_3 ; bl = 2
  7751 00003437 FECB                <1> 	dec	bl
  7752 00003439 750E                <1> 	jnz	short l_gfx_8_14c_4 ; bl > 3
  7753                              <1> 	; bl = 3
  7754                              <1> 	; case 3:
  7755                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, 42);
  7756                              <1> 	;    break;
  7757 0000343B C605[26670000]2B    <1> 	mov	byte [VGA_ROWS], 43  ; not 42 !
  7758                              <1> l_gfx_8_14c_3:
  7759                              <1>     	; case 2:
  7760                              <1>     	; default:
  7761                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, 24);
  7762                              <1> 	;    break;
  7763                              <1> 	; bl = 2 or bl > 3
  7764 00003442 C605[26670000]19    <1> 	mov	byte [VGA_ROWS], 25  ; not 24 !
  7765                              <1>     	; }
  7766                              <1> l_gfx_8_14c_4:
  7767                              <1>     	; write_byte(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT, 14);
  7768 00003449 C605[22670000]0E    <1>         mov     byte [CHAR_HEIGHT], 14
  7769                              <1> 	; }
  7770 00003450 C3                  <1> 	retn	
  7771                              <1> 
  7772                              <1> load_gfx_8_8_chars:
  7773                              <1> 	; 08/08/2016
  7774                              <1> 	; 10/07/2016
  7775                              <1> 	; Setup ROM 8x14 Font for Graphics Mode (VGA)
  7776                              <1> 	;
  7777                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  7778                              <1> 	; vgabios-0.7a (2011)
  7779                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  7780                              <1> 	; 'vgabios.c', 'biosfn_load_gfx_8_8_dd_chars'
  7781                              <1> 
  7782                              <1> 	; biosfn_load_gfx_8_8_dd_chars (BL)
  7783                              <1> 	; /* set 0x43 INT pointer */
  7784                              <1>     	; write_word(0x0, 0x43*4, &vgafont8);
  7785                              <1>     	; write_word(0x0, 0x43*4+2, 0xC000);
  7786 00003451 C705[EE830100]-     <1> 	mov	dword [VGA_INT43H], vgafont8
  7786 00003457 [D84D0100]          <1>
  7787                              <1> 		
  7788                              <1> 	; BL    screen rows code: 00H = user-specified (in DL)
  7789                              <1>         ;                         01H = 14 rows
  7790                              <1>         ;                         02H = 25 rows
  7791                              <1>         ;                         03H = 43 rows
  7792                              <1>         ; DL    (when BL=0) custom number of char rows on screen
  7793                              <1> 
  7794                              <1> 	; switch (BL) {
  7795                              <1> 	; case 0:
  7796                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, DL-1);
  7797                              <1> 	;    break;
  7798 0000345B 20DB                <1> 	and	bl, bl
  7799 0000345D 7508                <1> 	jnz	short l_gfx_8_8c_1
  7800 0000345F 8815[26670000]      <1> 	mov	[VGA_ROWS], dl  ; not DL-1 !
  7801 00003465 EB23                <1> 	jmp	short l_gfx_8_8c_4 	
  7802                              <1> l_gfx_8_8c_1:
  7803                              <1> 	; case 1:
  7804                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, 13);
  7805                              <1> 	;    break;
  7806 00003467 FECB                <1> 	dec	bl
  7807 00003469 7509                <1> 	jnz	short l_gfx_8_8c_2
  7808                              <1> 	; bl = 1
  7809 0000346B C605[26670000]0E    <1> 	mov	byte [VGA_ROWS], 14  ; not 13 !
  7810 00003472 EB16                <1> 	jmp	short l_gfx_8_8c_4 	
  7811                              <1> l_gfx_8_8c_2:
  7812 00003474 FECB                <1> 	dec	bl
  7813 00003476 740B                <1> 	jz	short l_gfx_8_8c_3 ; bl = 2
  7814 00003478 FECB                <1> 	dec	bl
  7815 0000347A 750E                <1> 	jnz	short l_gfx_8_8c_4 ; bl > 3
  7816                              <1> 	; bl = 3
  7817                              <1> 	; case 3:
  7818                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, 42);
  7819                              <1> 	;    break;
  7820 0000347C C605[26670000]2B    <1> 	mov	byte [VGA_ROWS], 43  ; not 42 !
  7821                              <1> l_gfx_8_8c_3:
  7822                              <1>     	; case 2:
  7823                              <1>     	; default:
  7824                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, 24);
  7825                              <1> 	;    break;
  7826                              <1> 	; bl = 2 or bl > 3
  7827 00003483 C605[26670000]19    <1> 	mov	byte [VGA_ROWS], 25  ; not 24 !	
  7828                              <1>     	; }
  7829                              <1> l_gfx_8_8c_4:
  7830                              <1>     	; write_byte(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT, 8);
  7831 0000348A C605[22670000]08    <1>         mov     byte [CHAR_HEIGHT], 8
  7832                              <1> 	; }
  7833 00003491 C3                  <1> 	retn
  7834                              <1> 
  7835                              <1> load_gfx_8_16_chars:
  7836                              <1> 	; 08/08/2016
  7837                              <1> 	; 10/07/2016
  7838                              <1> 	; Setup ROM 8x14 Font for Graphics Mode (VGA)
  7839                              <1> 	;
  7840                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  7841                              <1> 	; vgabios-0.7a (2011)
  7842                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  7843                              <1> 	; 'vgabios.c', 'biosfn_load_gfx_8_16_chars'
  7844                              <1> 
  7845                              <1> 	; biosfn_load_gfx_8_16_chars (BL)
  7846                              <1> 	; /* set 0x43 INT pointer */
  7847                              <1>     	; write_word(0x0, 0x43*4, &vgafont16);
  7848                              <1>     	; write_word(0x0, 0x43*4+2, 0xC000);
  7849 00003492 C705[EE830100]-     <1> 	mov	dword [VGA_INT43H], vgafont16
  7849 00003498 [D8630100]          <1>
  7850                              <1> 		
  7851                              <1> 	; BL    screen rows code: 00H = user-specified (in DL)
  7852                              <1>         ;                         01H = 14 rows
  7853                              <1>         ;                         02H = 25 rows
  7854                              <1>         ;                         03H = 43 rows
  7855                              <1>         ; DL    (when BL=0) custom number of char rows on screen
  7856                              <1> 
  7857                              <1> 	; switch (BL) {
  7858                              <1> 	; case 0:
  7859                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, DL-1);
  7860                              <1> 	;    break;
  7861 0000349C 20DB                <1> 	and	bl, bl
  7862 0000349E 7508                <1> 	jnz	short l_gfx_8_16c_1
  7863 000034A0 8815[26670000]      <1> 	mov	[VGA_ROWS], dl  ; not DL-1 !
  7864 000034A6 EB23                <1> 	jmp	short l_gfx_8_16c_4 	
  7865                              <1> l_gfx_8_16c_1:
  7866                              <1> 	; case 1:
  7867                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, 13);
  7868                              <1> 	;    break;
  7869 000034A8 FECB                <1> 	dec	bl
  7870 000034AA 7509                <1> 	jnz	short l_gfx_8_16c_2
  7871                              <1> 	; bl = 1
  7872 000034AC C605[26670000]0E    <1> 	mov	byte [VGA_ROWS], 14  ; not 13 !
  7873 000034B3 EB16                <1> 	jmp	short l_gfx_8_16c_4
  7874                              <1> l_gfx_8_16c_2:
  7875 000034B5 FECB                <1> 	dec	bl
  7876 000034B7 740B                <1> 	jz	short l_gfx_8_16c_3 ; bl = 2
  7877 000034B9 FECB                <1> 	dec	bl
  7878 000034BB 750E                <1> 	jnz	short l_gfx_8_16c_4 ; bl > 3
  7879                              <1> 	; bl = 3
  7880                              <1> 	; case 3:
  7881                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, 42);
  7882                              <1> 	;    break;
  7883 000034BD C605[26670000]2B    <1> 	mov	byte [VGA_ROWS], 43  ; not 42 !
  7884                              <1> l_gfx_8_16c_3:
  7885                              <1>     	; case 2:
  7886                              <1>     	; default:
  7887                              <1> 	;    write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, 24);
  7888                              <1> 	;    break;
  7889                              <1> 	; bl = 2 or bl > 3
  7890 000034C4 C605[26670000]19    <1> 	mov	byte [VGA_ROWS], 25  ; not 24 !	
  7891                              <1>     	; }
  7892                              <1> l_gfx_8_16c_4:
  7893                              <1>     	; write_byte(BIOSMEM_SEG, BIOSMEM_CHAR_HEIGHT, 16);
  7894 000034CB C605[22670000]10    <1>         mov     byte [CHAR_HEIGHT], 16
  7895                              <1> 	; }
  7896 000034D2 C3                  <1> 	retn
  7897                              <1> 			
  7898                              <1> get_font_info:
  7899                              <1> 	; 03/08/2022 (TRDOS 386 v2.0.5)
  7900                              <1> 	; 08/01/2021 (TRDOS 386 v2.0.3)
  7901                              <1> 	; 19/09/2016
  7902                              <1> 	; 08/08/2016
  7903                              <1> 	; 10/07/2016
  7904                              <1> 	; Get Current Character Generator Info (VGA)
  7905                              <1> 	;
  7906                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  7907                              <1> 	; vgabios-0.7a (2011)
  7908                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  7909                              <1> 	; 'vgabios.c', 'biosfn_get_font_info'
  7910                              <1> 
  7911                              <1> 	; Modified for TRDOS 386 !
  7912                              <1> 	;
  7913                              <1> 	; INPUT ->
  7914                              <1> 	;    AX = 1130h
  7915                              <1> 	;    BL = 0 -> Get info for current VGA font
  7916                              <1> 	;	       (BH = unused)
  7917                              <1> 	;    19/09/2016
  7918                              <1> 	;    BL > 0 -> Get requested character font data
  7919                              <1> 	;	 BL = 1 -> vgafont8
  7920                              <1> 	;        BL = 2 -> vgafont14
  7921                              <1> 	;	 BL = 3 -> vgafont16   
  7922                              <1> 	;	;08/01/2021
  7923                              <1> 	;	 BL = 4 -> user defined 8x8 font
  7924                              <1> 	;	 BL = 5 -> user defined 8x14 font
  7925                              <1> 	;	 BL = 6 -> user defined 8x16 font
  7926                              <1> 	;	 BL > 6 -> Invalid function (for now!)
  7927                              <1> 	;	 BH = ASCII code of the first character
  7928                              <1> 	;	 ECX = Number of characters from the 1st char
  7929                              <1> 	;	 ECX >= 256 -> All (256-BH) characters
  7930                              <1> 	;	 ECX = 0 -> All characters (BH = unused)
  7931                              <1> 	;        EDX = User's Buffer Address	
  7932                              <1> 	; OUTPUT ->
  7933                              <1> 	;    AL = height (scanlines), bytes per character
  7934                              <1> 	;    AH = screen rows
  7935                              <1> 	;    Byte 16-23 of EAX = number of columns
  7936                              <1> 	;    Byte 24-31 of EAX = 
  7937                              <1> 	;	  0 -> default font (not configured yet)
  7938                              <1> 	;	  0FFh -> user defined font
  7939                              <1> 	;	  14 = vgafont14
  7940                              <1> 	;	   8 = vgafont8
  7941                              <1> 	;	  16 = vgafont16
  7942                              <1> 	;   If BL input > 0 -> 
  7943                              <1> 	;       EAX = Actual transfer count
  7944                              <1> 	;
  7945 000034D3 20DB                <1> 	and	bl, bl
  7946 000034D5 740F                <1> 	jz	short gfi_1
  7947                              <1> 	; invalid function (input)
  7948                              <1> 	; 08/01/2021
  7949 000034D7 80FB04              <1> 	cmp	bl, 4
  7950 000034DA 7263                <1> 	jb	short gfi_5
  7951 000034DC 7441                <1> 	je	short gfi_3	
  7952 000034DE 80FB06              <1> 	cmp	bl, 6
  7953 000034E1 744C                <1> 	je	short gfi_4
  7954                              <1> 	; bh = 5 or bh > 6
  7955                              <1> gfi_0:
  7956 000034E3 31C0                <1> 	xor	eax, eax ; 0
  7957 000034E5 C3                  <1> 	retn
  7958                              <1> gfi_1:
  7959 000034E6 A0[22670000]        <1> 	mov	al, [CHAR_HEIGHT]
  7960 000034EB 8A25[26670000]      <1> 	mov	ah, [VGA_ROWS]
  7961 000034F1 C1E010              <1> 	shl	eax, 16
  7962 000034F4 A0[20670000]        <1> 	mov	al, [CRT_COLS]
  7963 000034F9 8B0D[EE830100]      <1> 	mov	ecx, [VGA_INT43H]
  7964 000034FF 21C9                <1> 	and	ecx, ecx
  7965 00003501 7418                <1> 	jz	short gfi_2 ; 0 = default font
  7966                              <1> 	; 08/01/2021
  7967 00003503 FECC                <1> 	dec	ah ; 0FFh
  7968 00003505 81F900400900        <1> 	cmp	ecx, VGAFONT16USER
  7969 0000350B 740E                <1> 	je	short gfi_2
  7970 0000350D 81F900500900        <1> 	cmp	ecx, VGAFONT8USER
  7971 00003513 7406                <1> 	je	short gfi_2	
  7972 00003515 8A25[22670000]      <1> 	mov	ah, [CHAR_HEIGHT] ; font size = height
  7973                              <1> gfi_2:
  7974 0000351B C1C010              <1> 	rol	eax, 16
  7975 0000351E C3                  <1> 	retn
  7976                              <1> gfi_3:
  7977                              <1> 	; 08/01/2021
  7978 0000351F F605[32100300]08    <1> 	test	byte [ufont], 08h ; 8x8 user font
  7979 00003526 74BB                <1> 	jz	short gfi_0 ; not loaded !
  7980 00003528 BE00500900          <1> 	mov	esi, VGAFONT8USER ; *
  7981                              <1> 	;mov	bl, 8
  7982                              <1> 	;jmp	short gfi_8
  7983 0000352D EB4A                <1> 	jmp	short gfi_10
  7984                              <1> gfi_4:
  7985                              <1> 	; 08/01/2021
  7986 0000352F F605[32100300]10    <1> 	test	byte [ufont], 10h ; 8x16 user font
  7987 00003536 74AB                <1> 	jz	short gfi_0 ; not loaded !
  7988 00003538 BE00400900          <1> 	mov	esi, VGAFONT16USER ; *
  7989 0000353D EB15                <1> 	jmp	short gfi_7
  7990                              <1> gfi_5:
  7991 0000353F 80FB02              <1> 	cmp	bl, 2
  7992 00003542 7230                <1> 	jb	short gfi_9
  7993 00003544 7709                <1> 	ja	short gfi_6
  7994                              <1> 	; BL = 2 -> vgafont14
  7995 00003546 BE[D8550100]        <1> 	mov	esi, vgafont14 ; *
  7996 0000354B B30E                <1> 	mov	bl, 14
  7997 0000354D EB07                <1> 	jmp	short gfi_8 
  7998                              <1> gfi_6:
  7999                              <1> 	; BL = 3 -> vgafont16
  8000 0000354F BE[D8630100]        <1> 	mov	esi, vgafont16 ; *
  8001                              <1> gfi_7:
  8002 00003554 B310                <1> 	mov	bl, 16
  8003                              <1> gfi_8:
  8004 00003556 89D7                <1> 	mov	edi, edx ; **
  8005 00003558 09C9                <1> 	or	ecx, ecx
  8006 0000355A 7421                <1> 	jz	short gfi_11 ; all chars from the 00h
  8007                              <1> 	;mov	al, bh ; character index
  8008                              <1> 	; 03/08/2022
  8009 0000355C 0FB6C7              <1> 	movzx	eax, bh
  8010 0000355F F6E3                <1> 	mul	bl ; char index * char height/size
  8011                              <1> 	;movzx	edx, ax
  8012                              <1> 	; 03/08/2022
  8013                              <1> 	;add	esi, edx ; *
  8014 00003561 01C6                <1> 	add	esi, eax
  8015 00003563 31D2                <1> 	xor	edx, edx
  8016 00003565 FECA                <1> 	dec	dl 
  8017                              <1> 	; edx = 0FFh = 255
  8018                              <1> 	;mov	dx, 255
  8019 00003567 28FA                <1> 	sub	dl, bh
  8020                              <1> 	;inc	dx	
  8021                              <1> 	; 03/08/2022
  8022 00003569 42                  <1> 	inc	edx
  8023 0000356A 39D1                <1> 	cmp	ecx, edx
  8024 0000356C 770F                <1> 	ja	short gfi_11
  8025 0000356E 7411                <1> 	je	short gfi_12
  8026 00003570 89D1                <1> 	mov	ecx, edx
  8027 00003572 EB0D                <1> 	jmp	short gfi_12
  8028                              <1> gfi_9:
  8029                              <1> 	;BL = 1 -> vgafont8
  8030 00003574 BE[D84D0100]        <1> 	mov	esi, vgafont8 ; *
  8031                              <1> gfi_10:
  8032 00003579 B308                <1> 	mov	bl, 8
  8033 0000357B EBD9                <1> 	jmp	short gfi_8
  8034                              <1> gfi_11:
  8035                              <1> 	;mov	ecx, 256
  8036                              <1> 	; 03/08/2022
  8037 0000357D 29C9                <1> 	sub	ecx, ecx
  8038 0000357F FEC5                <1> 	inc	ch
  8039                              <1> 	; ecx = 100h 
  8040                              <1> gfi_12:
  8041                              <1> 	; 08/01/2021
  8042 00003581 89C8                <1> 	mov	eax, ecx ; character count
  8043 00003583 30FF                <1> 	xor	bh, bh
  8044 00003585 66F7E3              <1> 	mul	bx ; char count * char height/size
  8045 00003588 89C1                <1>  	mov	ecx, eax
  8046                              <1> 
  8047                              <1> 	; ESI = source address in system space
  8048                              <1> 	; EDI = user's buffer address
  8049                              <1> 	; ECX = transfer (byte) count
  8050 0000358A E81AD80000          <1> 	call	transfer_to_user_buffer
  8051 0000358F 89C8                <1> 	mov	eax, ecx ; actual transfer count
  8052 00003591 C3                  <1> 	retn
  8053                              <1> 
  8054                              <1> set_all_palette_reg:
  8055                              <1> 	; 03/08/2022
  8056                              <1> 	; 10/08/2016
  8057                              <1> 	; Set All Palette Registers and Overscan
  8058                              <1> 	; EDX = Address of 17 bytes; 
  8059                              <1> 	; an rgbRGB value for each of 16 palette
  8060                              <1> 	; registers plus one for the border.
  8061                              <1> 
  8062 00003592 89D6                <1> 	mov	esi, edx ; user buffer
  8063                              <1> 	;mov	ecx, 17
  8064                              <1> 	; 03/08/2022
  8065 00003594 29C9                <1> 	sub	ecx, ecx
  8066 00003596 B111                <1> 	mov	cl, 17
  8067 00003598 89E7                <1> 	mov	edi, esp
  8068 0000359A 83EC14              <1> 	sub	esp, 20	 	 
  8069 0000359D E851D80000          <1> 	call	transfer_from_user_buffer
  8070                              <1> 	;jc	VIDEO_RETURN
  8071                              <1> 
  8072 000035A2 66BADA03            <1> 	mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8073 000035A6 EC                  <1> 	in	al, dx
  8074                              <1> 	;mov	cl, 0
  8075                              <1> 	; 03/08/2022
  8076 000035A7 28C9                <1> 	sub	cl, cl
  8077                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8078                              <1> 	; 03/08/2022
  8079 000035A9 B2C0                <1> 	mov	dl, 0C0h
  8080                              <1> set_palette_loop:
  8081 000035AB 88C8                <1> 	mov	al, cl
  8082 000035AD EE                  <1> 	out	dx, al
  8083 000035AE 8A07                <1> 	mov	al, [edi]
  8084 000035B0 EE                  <1> 	out	dx, al
  8085 000035B1 47                  <1> 	inc	edi
  8086 000035B2 FEC1                <1> 	inc	cl
  8087 000035B4 80F910              <1> 	cmp	cl, 10h
  8088 000035B7 75F2                <1> 	jne	short set_palette_loop
  8089 000035B9 B011                <1> 	mov	al, 11h
  8090 000035BB EE                  <1> 	out	dx, al
  8091 000035BC 8A07                <1> 	mov	al, [edi]
  8092 000035BE EE                  <1> 	out	dx, al
  8093 000035BF B020                <1> 	mov	al, 20h
  8094 000035C1 EE                  <1> 	out	dx, al
  8095                              <1> 	; ifdef VBOX
  8096                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8097                              <1> 	; 03/08/2022
  8098 000035C2 B2DA                <1> 	mov	dl, 0DAh
  8099 000035C4 EC                  <1> 	in	al, dx
  8100                              <1> 	; endif ; VBOX
  8101 000035C5 83C414              <1> 	add	esp, 20
  8102 000035C8 E941E5FFFF          <1> 	jmp	VIDEO_RETURN
  8103                              <1> 	
  8104                              <1> 	; 07/08/2022
  8105                              <1> toggle_intensity:
  8106                              <1> 	; 03/08/2022
  8107                              <1> 	; 10/08/2016
  8108                              <1> 	; Select Foreground Blink or Bold Background
  8109                              <1> 	; BL = 00h = enable bold backgrounds
  8110                              <1> 	;	    (16 background colors)
  8111                              <1>         ;      01h = enable blinking foreground
  8112                              <1> 	;	    (8 background colors)
  8113                              <1> 
  8114 000035CD 66BADA03            <1> 	mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8115 000035D1 EC                  <1> 	in	al, dx
  8116                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8117                              <1> 	; 03/08/2022
  8118 000035D2 B2C0                <1> 	mov	dl, 0C0h
  8119 000035D4 B010                <1> 	mov	al, 10h
  8120 000035D6 EE                  <1> 	out	dx, al
  8121                              <1> 	;mov	dx, 3C1h ; VGAREG_ACTL_READ_DATA
  8122                              <1> 	; 03/08/2022
  8123 000035D7 FEC2                <1> 	inc	dl ; dx = 3C1h
  8124 000035D9 EC                  <1> 	in	al, dx
  8125 000035DA 24F7                <1> 	and	al, 0F7h
  8126 000035DC 80E301              <1> 	and	bl, 01h
  8127 000035DF C0E303              <1> 	shl	bl, 3
  8128 000035E2 08D8                <1> 	or	al, bl
  8129                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8130                              <1> 	; 03/08/2022
  8131 000035E4 FECA                <1> 	dec	dl ; dx = 3C0h
  8132 000035E6 EE                  <1> 	out	dx, al
  8133 000035E7 B020                <1> 	mov	al, 20h
  8134 000035E9 EE                  <1> 	out	dx, al
  8135                              <1> 	; ifdef VBOX
  8136                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8137                              <1> 	; 03/08/2022
  8138 000035EA B2DA                <1> 	mov	dl, 0DAh
  8139 000035EC EC                  <1> 	in	al, dx
  8140                              <1> 	; endif ; VBOX
  8141 000035ED E91CE5FFFF          <1> 	jmp	VIDEO_RETURN
  8142                              <1> 
  8143                              <1> 	; 07/08/2022
  8144                              <1> vga_palf_unknown:
  8145 000035F2 29C0                <1> 	sub	eax, eax ; 0 = invalid function
  8146 000035F4 E91AE5FFFF          <1>         jmp     _video_return
  8147                              <1> 
  8148                              <1> 	; 07/08/2022
  8149                              <1> vga_palf_101B:
  8150 000035F9 3C1B                <1> 	cmp	al, 1Bh
  8151                              <1> 	;jne	short vga_palf_unknown
  8152 000035FB 77F5                <1> 	ja	short vga_palf_unknown
  8153                              <1>  
  8154 000035FD E810F6FFFF          <1> 	call	gray_scale_summing
  8155 00003602 E907E5FFFF          <1>         jmp     VIDEO_RETURN 
  8156                              <1> 	
  8157                              <1> vga_pal_funcs:
  8158                              <1> 	; 07/08/2022
  8159                              <1> 	; 10/08/2016
  8160                              <1> 	; VGA Palette functions
  8161                              <1> 	;
  8162                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
  8163                              <1> 	; vgabios-0.7a (2011)
  8164                              <1> 	; by the LGPL VGABios developers Team (2001-2008)
  8165                              <1> 	; 'vgabios.c', 'vgarom.asm'
  8166                              <1> 
  8167 00003607 3C00                <1> 	cmp	al, 0
  8168 00003609 7467                <1>         je      short set_single_palette_reg
  8169                              <1> vga_palf_1002:
  8170 0000360B 3C02                <1> 	cmp	al, 2
  8171 0000360D 7483                <1>         je      short set_all_palette_reg
  8172                              <1> 	; 07/08/2022
  8173 0000360F 7702                <1> 	ja	short vga_palf_1003
  8174 00003611 EB5D                <1> 	jmp	short set_overscan_border_color 
  8175                              <1> 	; 07/08/2022
  8176                              <1> ;vga_palf_1001:
  8177                              <1> ;	cmp	al, 1
  8178                              <1> ;	je	short set_overscan_border_color
  8179                              <1> vga_palf_1003:
  8180 00003613 3C03                <1> 	cmp	al, 3
  8181 00003615 74B6                <1> 	je	short toggle_intensity
  8182                              <1> vga_palf_1007:
  8183 00003617 3C07                <1> 	cmp	al, 7
  8184 00003619 747F                <1>         je      short get_single_palette_reg
  8185 0000361B 72D5                <1> 	jb	short vga_palf_unknown
  8186                              <1> vga_palf_1008:
  8187 0000361D 3C08                <1> 	cmp	al, 8
  8188 0000361F 7477                <1>         je      short read_overscan_border_color
  8189                              <1> vga_palf_1009:
  8190 00003621 3C09                <1> 	cmp	al, 9
  8191                              <1> 	;je	short get_all_palette_reg
  8192                              <1> 	; 07/08/2022
  8193 00003623 7505                <1> 	jne	short vga_palf_1010
  8194 00003625 E966010000          <1> 	jmp	get_all_palette_reg
  8195                              <1> vga_palf_1010:
  8196 0000362A 3C10                <1> 	cmp	al, 10h
  8197                              <1> 	;je 	short set_single_dac_reg
  8198                              <1> 	; 07/08/2022
  8199 0000362C 7707                <1> 	ja	short vga_palf_1012
  8200 0000362E 72C2                <1> 	jb	short vga_palf_unknown
  8201 00003630 E908010000          <1> 	jmp	set_single_dac_reg
  8202                              <1> vga_palf_1012:
  8203 00003635 3C12                <1> 	cmp	al, 12h
  8204                              <1> 	;je	short set_all_dac_reg
  8205                              <1> 	; 07/08/2022
  8206 00003637 7707                <1> 	ja	short vga_palf_1013
  8207 00003639 72B7                <1> 	jb	short vga_palf_unknown
  8208 0000363B E916010000          <1> 	jmp	set_all_dac_reg	
  8209                              <1> vga_palf_1013:
  8210 00003640 3C13                <1> 	cmp	al, 13h
  8211                              <1> 	;je	short select_video_dac_color_page
  8212                              <1> 	; 07/08/2022
  8213 00003642 7505                <1> 	jne	short vga_palf_1015
  8214 00003644 E992010000          <1> 	jmp	select_video_dac_color_page
  8215                              <1> vga_palf_1015:
  8216 00003649 3C15                <1> 	cmp	al, 15h
  8217                              <1> 	;je	short read_single_dac_reg
  8218                              <1> 	; 07/08/2022
  8219 0000364B 7707                <1> 	ja	short vga_palf_1017
  8220 0000364D 72A3                <1> 	jb	short vga_palf_unknown
  8221 0000364F E98D000000          <1> 	jmp	read_single_dac_reg
  8222                              <1> vga_palf_1017:
  8223 00003654 3C17                <1> 	cmp	al, 17h
  8224                              <1> 	;je	short read_all_dac_reg
  8225                              <1> 	; 07/08/2022
  8226 00003656 7707                <1> 	ja	short vga_palf_1018
  8227 00003658 7298                <1> 	jb	short vga_palf_unknown
  8228 0000365A E9A0000000          <1> 	jmp	read_all_dac_reg
  8229                              <1> vga_palf_1018:
  8230 0000365F 3C18                <1> 	cmp	al, 18h
  8231 00003661 7464                <1>         je	short set_pel_mask
  8232                              <1> vga_palf_1019:
  8233 00003663 3C19                <1> 	cmp	al, 19h
  8234 00003665 746C                <1>         je	short read_pel_mask
  8235                              <1> vga_palf_101A:
  8236 00003667 3C1A                <1> 	cmp	al, 1Ah
  8237                              <1>         ;je	short read_video_dac_state
  8238                              <1> 	; 07/08/2022
  8239 00003669 758E                <1> 	jne	short vga_palf_101B
  8240 0000366B E9AD010000          <1> 	jmp	read_video_dac_state
  8241                              <1> 
  8242                              <1> 	; 07/08/2022
  8243                              <1> set_overscan_border_color:
  8244                              <1> 	; 10/08/2016
  8245                              <1> 	; Set Overscan/Border Color Register
  8246                              <1> 	; BH = 6-bit RGB color to display 
  8247                              <1> 	;      for that attribute
  8248                              <1> 	
  8249 00003670 B311                <1> 	mov	bl, 11h
  8250                              <1>   	; 07/08/2022
  8251                              <1> 	;jmp	short set_single_palette_reg
  8252                              <1> 
  8253                              <1> set_single_palette_reg:
  8254                              <1> 	; 03/08/2022 (TRDOS 386 v2.0.5)
  8255                              <1> 	; 12/04/2021 (TRDOS 386 v2.0.3, 32 bit push/pop)
  8256                              <1> 	; 10/08/2016
  8257                              <1> 	; Set One Palette Register
  8258                              <1> 	; BL = register number to set
  8259                              <1> 	;     (a 4-bit attribute nibble: 00h-0Fh)
  8260                              <1> 	; BH = 6-bit RGB color to display 
  8261                              <1> 	;      for that attribute
  8262                              <1> 
  8263 00003672 80FB14              <1> 	cmp	bl, 14h
  8264                              <1> 	;;ja	short no_actl_reg1
  8265                              <1> 	;ja	VIDEO_RETURN
  8266                              <1> 	; 03/08/2022
  8267 00003675 7605                <1> 	jna	short sspr_1
  8268 00003677 E992E4FFFF          <1> 	jmp	VIDEO_RETURN
  8269                              <1> sspr_1:
  8270                              <1> 	;push	ax
  8271                              <1> 	;push	dx
  8272                              <1> 	; 12/04/2021
  8273 0000367C 50                  <1> 	push	eax
  8274 0000367D 52                  <1> 	push	edx
  8275 0000367E 66BADA03            <1> 	mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8276 00003682 EC                  <1> 	in	al, dx
  8277                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8278                              <1> 	; 03/08/2022
  8279 00003683 B2C0                <1> 	mov	dl, 0C0h
  8280 00003685 88D8                <1> 	mov	al, bl
  8281 00003687 EE                  <1> 	out	dx, al
  8282 00003688 88F8                <1> 	mov	al, bh
  8283 0000368A EE                  <1> 	out	dx, al
  8284 0000368B B020                <1> 	mov	al, 20h
  8285 0000368D EE                  <1> 	out	dx, al
  8286                              <1> 	; ifdef VBOX
  8287                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8288                              <1> 	; 03/08/2022
  8289 0000368E B2DA                <1> 	mov	dl, 0DAh
  8290 00003690 EC                  <1> 	in	al, dx
  8291                              <1> 	; endif ; VBOX
  8292                              <1> 	;pop	dx
  8293                              <1> 	;pop	ax
  8294                              <1> 	; 12/04/2021
  8295 00003691 5A                  <1> 	pop	edx
  8296 00003692 58                  <1> 	pop	eax
  8297                              <1> ;no_actl_reg1:
  8298 00003693 E976E4FFFF          <1> 	jmp	VIDEO_RETURN
  8299                              <1> 
  8300                              <1> 	; 07/08/2022
  8301                              <1> read_overscan_border_color:
  8302                              <1> 	; 10/08/2016
  8303                              <1> 	; Read Overscan Register
  8304                              <1> 	; OUTPUT:
  8305                              <1> 	; BH = current rgbRGB value 
  8306                              <1> 	;      of the overscan/border register
  8307                              <1> 
  8308 00003698 B311                <1> 	mov	bl, 11h
  8309                              <1> 	; 07/08/2022
  8310                              <1> 	;jmp	short get_single_palette_reg
  8311                              <1> 
  8312                              <1> get_single_palette_reg:
  8313                              <1> 	; 03/08/2022
  8314                              <1> 	; 10/08/2016
  8315                              <1> 	; Read One Palette Register
  8316                              <1>         ; INPUT:
  8317                              <1> 	; BL = Palette register to read (00h-0Fh)
  8318                              <1> 	; OUTPUT:
  8319                              <1> 	; BH = Current rgbRGB value of specified register
  8320                              <1> 	;      for that attribute
  8321                              <1> 
  8322 0000369A 80FB14              <1> 	cmp	bl, 14h
  8323                              <1> 	;;ja	short no_actl_reg2
  8324                              <1> 	;ja	VIDEO_RETURN
  8325                              <1> 	; 03/08/2022
  8326 0000369D 7605                <1> 	jna	short gspr_1
  8327 0000369F E96AE4FFFF          <1> 	jmp	VIDEO_RETURN
  8328                              <1> gspr_1:
  8329 000036A4 66BADA03            <1> 	mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8330                              <1> 	; 03/08/2022
  8331 000036A8 B2DA                <1> 	mov	dl, 0DAh
  8332 000036AA EC                  <1> 	in	al, dx
  8333                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8334                              <1> 	; 03/08/2022
  8335 000036AB B2C0                <1> 	mov	dl, 0C0h
  8336 000036AD 88D8                <1> 	mov	al, bl
  8337 000036AF EE                  <1> 	out	dx, al
  8338                              <1> 	;mov	dx, 3C1h ; VGAREG_ACTL_READ_DATA
  8339                              <1> 	; 03/08/2022
  8340 000036B0 FEC2                <1> 	inc	dl ; dx = 3C1h
  8341 000036B2 EC                  <1> 	in	al, dx
  8342 000036B3 8844240D            <1> 	mov	[esp+13], al ; bh
  8343                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8344                              <1> 	; 03/08/2022
  8345 000036B7 B2DA                <1> 	mov	dl, 0DAh
  8346 000036B9 EC                  <1> 	in	al, dx
  8347                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8348                              <1> 	; 03/08/2022
  8349 000036BA B2C0                <1> 	mov	dl, 0C0h
  8350 000036BC B020                <1> 	mov	al, 20h
  8351 000036BE EE                  <1> 	out	dx, al
  8352                              <1> 	; ifdef VBOX
  8353                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8354                              <1> 	; 03/08/2022
  8355 000036BF B2DA                <1> 	mov	dl, 0DAh
  8356 000036C1 EC                  <1> 	in	al, dx
  8357                              <1> 	; endif ; VBOX
  8358 000036C2 E947E4FFFF          <1> 	jmp	VIDEO_RETURN
  8359                              <1> 
  8360                              <1> set_pel_mask:
  8361                              <1> 	; 10/08/2016
  8362                              <1> 	; BL = mask value
  8363 000036C7 66BAC603            <1> 	mov	dx, 3C6h ; VGAREG_PEL_MASK
  8364 000036CB 88D8                <1> 	mov	al, bl
  8365 000036CD EE                  <1> 	out	dx, al
  8366 000036CE E93BE4FFFF          <1> 	jmp	VIDEO_RETURN
  8367                              <1> 
  8368                              <1> read_pel_mask:
  8369                              <1> 	; 10/08/2016
  8370                              <1> 	; Output: BL = mask value 
  8371 000036D3 66BAC603            <1> 	mov	dx, 3C6h ; VGAREG_PEL_MASK
  8372 000036D7 EC                  <1> 	in	al, dx
  8373 000036D8 8844240C            <1> 	mov	[esp+12], al ; bl
  8374 000036DC E92DE4FFFF          <1> 	jmp	VIDEO_RETURN
  8375                              <1> 
  8376                              <1> read_single_dac_reg:
  8377                              <1> 	; 02/08/2022
  8378                              <1> 	; 10/08/2016
  8379                              <1> 	; Read One DAC Color Register
  8380                              <1> 	; INPUT:
  8381                              <1> 	; BX = color register to read (0-255)
  8382                              <1> 	; OUTPUT:
  8383                              <1> 	; CH = green value (00h-3Fh)
  8384                              <1>         ; CL = blue value  (00h-3Fh)
  8385                              <1>         ; DH = red value   (00h-3Fh)
  8386                              <1> 
  8387 000036E1 66BAC703            <1> 	mov	dx, 3C7h ; VGAREG_DAC_READ_ADDRESS
  8388 000036E5 88D8                <1> 	mov	al, bl
  8389 000036E7 EE                  <1> 	out	dx, al
  8390                              <1> 	;mov	dx, 3C9h ; VGAREG_DAC_DATA
  8391                              <1> 	; 02/08/2022
  8392 000036E8 B2C9                <1> 	mov	dl, 0C9h
  8393 000036EA EC                  <1> 	in	al, dx
  8394 000036EB 88442415            <1> 	mov	[esp+21], al ; dh
  8395 000036EF EC                  <1> 	in	al, dx
  8396 000036F0 88C5                <1> 	mov	ch, al
  8397 000036F2 EC                  <1> 	in	al, dx
  8398 000036F3 88C1                <1> 	mov	cl, al
  8399 000036F5 66894C2410          <1> 	mov	[esp+16], cx ; cx
  8400 000036FA E90FE4FFFF          <1> 	jmp	VIDEO_RETURN
  8401                              <1> 
  8402                              <1> read_all_dac_reg:
  8403                              <1> 	; 02/08/2022
  8404                              <1> 	; 12/08/2016
  8405                              <1> 	; 11/08/2016
  8406                              <1> 	; 10/08/2016
  8407                              <1> 	; Read a Block of DAC Color Registers
  8408                              <1>         ; BX = first DAC register to read (0-00FFh)
  8409                              <1>         ; ECX = number of registers to read (0-00FFh)
  8410                              <1>         ; EDX = addr of a buffer to hold R,G,B values
  8411                              <1> 	;	(CX*3 bytes long)
  8412                              <1> 
  8413 000036FF 89D7                <1> 	mov	edi, edx ; user buffer
  8414 00003701 89CA                <1> 	mov	edx, ecx
  8415                              <1> 	;shl	dx, 1 ; *2
  8416                              <1> 	; 02/08/2022
  8417 00003703 D1E2                <1> 	shl	edx, 1
  8418 00003705 01CA                <1> 	add	edx, ecx ; edx = 3*ecx
  8419 00003707 89E5                <1> 	mov	ebp, esp
  8420 00003709 89EE                <1> 	mov	esi, ebp
  8421 0000370B 29D6                <1> 	sub	esi, edx
  8422 0000370D 6683E6FC            <1> 	and	si, 0FFFCh ; (dword alignment)
  8423 00003711 89F4                <1> 	mov	esp, esi
  8424 00003713 52                  <1> 	push	edx ; 3*ecx
  8425 00003714 66BAC703            <1> 	mov	dx, 3C7h ; VGAREG_DAC_READ_ADDRESS
  8426 00003718 88D8                <1> 	mov	al, bl
  8427 0000371A EE                  <1> 	out	dx, al
  8428 0000371B 66BAC903            <1> 	mov	dx, 3C9h ; VGAREG_DAC_DATA
  8429 0000371F 89F3                <1> 	mov	ebx, esi
  8430                              <1> read_dac_loop:
  8431 00003721 EC                  <1> 	in	al, dx
  8432 00003722 8803                <1> 	mov	[ebx], al
  8433 00003724 43                  <1> 	inc	ebx
  8434 00003725 EC                  <1> 	in	al, dx
  8435 00003726 8803                <1> 	mov	[ebx], al
  8436 00003728 43                  <1> 	inc	ebx
  8437 00003729 EC                  <1> 	in	al, dx
  8438 0000372A 8803                <1> 	mov	[ebx], al
  8439 0000372C 43                  <1> 	inc	ebx
  8440                              <1> 	;dec	cx
  8441                              <1> 	; 02/08/2022
  8442 0000372D 49                  <1> 	dec	ecx
  8443 0000372E 75F1                <1> 	jnz	short read_dac_loop
  8444 00003730 59                  <1> 	pop	ecx ; 3*ecx
  8445                              <1> 	; ECX = transfer (byte) count
  8446                              <1> 	; ESI = source address in system space
  8447                              <1> 	; EDI = user's buffer address
  8448 00003731 E873D60000          <1> 	call	transfer_to_user_buffer
  8449 00003736 89EC                <1> 	mov	esp, ebp
  8450 00003738 E9D1E3FFFF          <1> 	jmp	VIDEO_RETURN
  8451                              <1> 
  8452                              <1> set_single_dac_reg:
  8453                              <1> 	; 03/08/2022 (TRDOS 386 v2.0.5)
  8454                              <1> 	; 12/04/2021 (TRDOS 386 v2.0.3, 32 bit push/pop)
  8455                              <1> 	; 10/08/2016
  8456                              <1> 	; Set One DAC Color Register
  8457                              <1> 	; BX = color register to set (0-255)
  8458                              <1>         ; CH = green value (00h-3Fh)
  8459                              <1>         ; CL = blue value  (00h-3Fh)
  8460                              <1>         ; DH = red value   (00h-3Fh)
  8461                              <1> 
  8462                              <1> 	;push	dx
  8463                              <1> 	; 12/04/2021
  8464 0000373D 52                  <1> 	push	edx
  8465 0000373E 66BAC803            <1> 	mov	dx, 3C8h ; VGAREG_DAC_WRITE_ADDRESS
  8466 00003742 88D8                <1> 	mov	al, bl
  8467 00003744 EE                  <1> 	out	dx, al
  8468                              <1> 	;;mov	dx, 3C9h ; VGAREG_DAC_DATA
  8469                              <1> 	;inc	dx
  8470                              <1> 	; 03/08/2022
  8471 00003745 FEC2                <1> 	inc	dl
  8472                              <1> 	;pop	ax
  8473                              <1> 	; 12/04/2021
  8474 00003747 58                  <1> 	pop	eax
  8475 00003748 88E0                <1> 	mov	al, ah
  8476 0000374A EE                  <1> 	out	dx, al
  8477 0000374B 88E8                <1> 	mov	al, ch
  8478 0000374D EE                  <1> 	out	dx, al
  8479 0000374E 88C8                <1> 	mov	al, cl
  8480 00003750 EE                  <1> 	out	dx, al
  8481 00003751 E9B8E3FFFF          <1> 	jmp	VIDEO_RETURN
  8482                              <1> 
  8483                              <1> set_all_dac_reg:
  8484                              <1> 	; 02/08/2022 
  8485                              <1> 	; 12/08/2016
  8486                              <1> 	; 11/08/2016
  8487                              <1> 	; 10/08/2016
  8488                              <1> 	; Set a Block of DAC Color Register
  8489                              <1> 	; BX = first DAC register to set (0-00FFh)
  8490                              <1> 	; ECX = number of registers to set (0-00FFh)
  8491                              <1> 	; EDX = addr of a table of R,G,B values 
  8492                              <1> 	;	(it will be CX*3 bytes long)
  8493                              <1> 
  8494 00003756 89D6                <1> 	mov	esi, edx ; user buffer
  8495 00003758 89CA                <1> 	mov	edx, ecx
  8496                              <1> 	;shl	cx, 1 ; *2
  8497                              <1> 	; 02/08/2022
  8498 0000375A D1E1                <1> 	shl	ecx, 1
  8499 0000375C 01D1                <1> 	add	ecx, edx ; ecx = 3*ecx
  8500 0000375E 89E5                <1> 	mov	ebp, esp
  8501 00003760 89EF                <1> 	mov	edi, ebp
  8502 00003762 29CF                <1> 	sub	edi, ecx
  8503 00003764 6683E7FC            <1> 	and	di, 0FFFCh ; (dword alignment)
  8504 00003768 89FC                <1> 	mov	esp, edi
  8505 0000376A E884D60000          <1> 	call	transfer_from_user_buffer
  8506                              <1> 	;jc	VIDEO_RETURN
  8507                              <1> 
  8508 0000376F 89D1                <1> 	mov	ecx, edx
  8509 00003771 66BAC803            <1> 	mov	dx, 3C8h ; VGAREG_DAC_WRITE_ADDRESS
  8510 00003775 88D8                <1> 	mov	al, bl
  8511 00003777 EE                  <1> 	out	dx, al
  8512                              <1> 	;mov	dx, 3C9h ; VGAREG_DAC_DATA
  8513                              <1> 	; 02/08/2022
  8514 00003778 FEC2                <1> 	inc	dl
  8515                              <1> set_dac_loop:
  8516 0000377A 8A07                <1> 	mov	al, [edi]
  8517 0000377C EE                  <1> 	out	dx, al
  8518 0000377D 47                  <1> 	inc	edi
  8519 0000377E 8A07                <1> 	mov	al, [edi]
  8520 00003780 EE                  <1> 	out	dx, al
  8521 00003781 47                  <1> 	inc	edi
  8522 00003782 8A07                <1> 	mov	al, [edi]
  8523 00003784 EE                  <1> 	out	dx, al
  8524 00003785 47                  <1> 	inc	edi
  8525                              <1> 	;dec	cx
  8526                              <1> 	; 02/08/2022
  8527 00003786 49                  <1> 	dec	ecx
  8528 00003787 75F1                <1> 	jnz	short set_dac_loop
  8529 00003789 89EC                <1> 	mov	esp, ebp
  8530 0000378B E97EE3FFFF          <1> 	jmp	VIDEO_RETURN
  8531                              <1> 
  8532                              <1> get_all_palette_reg:
  8533                              <1> 	; 03/08/2022
  8534                              <1> 	; 10/08/2016
  8535                              <1> 	; Read All Palette Registers
  8536                              <1> 	; EDX = Address of 17-byte buffer 
  8537                              <1> 	;	to receive data
  8538                              <1> 	
  8539 00003790 89D7                <1> 	mov	edi, edx
  8540 00003792 89E3                <1> 	mov	ebx, esp
  8541 00003794 89DE                <1> 	mov	esi, ebx
  8542 00003796 83EC14              <1> 	sub	esp, 20	 
  8543                              <1> 
  8544 00003799 B100                <1> 	mov	cl, 0
  8545                              <1> get_palette_loop:
  8546 0000379B 66BADA03            <1> 	mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8547 0000379F EC                  <1> 	in	al, dx
  8548                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8549                              <1> 	; 03/08/2022
  8550 000037A0 B2C0                <1> 	mov	dl, 0C0h
  8551 000037A2 88C8                <1> 	mov	al, cl
  8552 000037A4 EE                  <1> 	out	dx, al
  8553                              <1> 	;mov	dx, 3C1h ; VGAREG_ACTL_READ_DATA
  8554                              <1> 	; 03/08/2022
  8555                              <1> 	;mov	dl, 0C1h
  8556 000037A5 FEC2                <1> 	inc	dl
  8557 000037A7 EC                  <1> 	in	al, dx
  8558 000037A8 8803                <1> 	mov	[ebx], al
  8559 000037AA 43                  <1> 	inc	ebx
  8560 000037AB FEC1                <1> 	inc	cl
  8561 000037AD 80F910              <1> 	cmp	cl, 10h
  8562 000037B0 75E9                <1> 	jne	short get_palette_loop
  8563                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8564                              <1> 	; 03/08/2022
  8565 000037B2 B2DA                <1> 	mov	dl, 0DAh
  8566 000037B4 EC                  <1> 	in	al, dx
  8567                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8568                              <1> 	; 03/08/2022
  8569 000037B5 B2C0                <1> 	mov	dl, 0C0h
  8570 000037B7 B011                <1> 	mov	al, 11h
  8571 000037B9 EE                  <1> 	out	dx, al
  8572                              <1> 	;mov	dx, 3C1h ; VGAREG_ACTL_READ_DATA
  8573                              <1> 	; 03/08/2022
  8574 000037BA FEC2                <1> 	inc	dl ; dx = 3C1h
  8575 000037BC EC                  <1> 	in	al, dx
  8576 000037BD 8803                <1> 	mov	[ebx], al
  8577                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8578                              <1> 	; 03/08/2022
  8579 000037BF B2DA                <1> 	mov	dl, 0DAh
  8580 000037C1 EC                  <1> 	in	al, dx
  8581                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8582                              <1> 	; 03/08/2022
  8583 000037C2 B2C0                <1> 	mov	dl, 0C0h
  8584 000037C4 B020                <1> 	mov	al, 20h
  8585 000037C6 EE                  <1> 	out	dx, al
  8586                              <1> 	; ifdef VBOX
  8587                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8588                              <1> 	; 03/08/2022
  8589 000037C7 B2DA                <1> 	mov	dl, 0DAh
  8590 000037C9 EC                  <1> 	in	al, dx
  8591                              <1> 	; endif ; VBOX
  8592                              <1> 
  8593                              <1> 	;mov	ecx, 17 ; transfer (byte) count
  8594                              <1> 	; 03/08/2022
  8595 000037CA 29C9                <1> 	sub	ecx, ecx
  8596 000037CC B111                <1> 	mov	cl, 17	
  8597                              <1> 
  8598                              <1> 	; ESI = source address in system space
  8599                              <1> 	; EDI = user's buffer address
  8600 000037CE E8D6D50000          <1> 	call	transfer_to_user_buffer
  8601                              <1> 
  8602 000037D3 83C414              <1> 	add	esp, 20
  8603 000037D6 E933E3FFFF          <1> 	jmp	VIDEO_RETURN
  8604                              <1> 
  8605                              <1> select_video_dac_color_page:
  8606                              <1> 	; 02/08/2022 (TRDOS 386 v2.0.5, code optimization)
  8607                              <1> 	; 12/04/2021 (TRDOS 386 v2.0.3, 32 bit push/pop)
  8608                              <1> 	; 10/08/2016
  8609                              <1> 	; DAC Color Paging Functions
  8610                              <1> 	; BL = 00H = select color paging mode
  8611                              <1>         ;       BH = paging mode
  8612                              <1>         ;            00h = 4 blocks of 64 registers
  8613                              <1>         ;            01h = 16 blocks of 16 registers
  8614                              <1> 	; BL = 01H = activate color page
  8615                              <1>         ;       BH = DAC color page number
  8616                              <1>         ;            00h-03h (4-page/64-reg mode)
  8617                              <1>         ;            00h-0Fh (16-page/16-reg mode)
  8618                              <1> 
  8619 000037DB 66BADA03            <1> 	mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8620 000037DF EC                  <1> 	in	al, dx
  8621                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8622                              <1> 	; 02/08/2022
  8623 000037E0 B240                <1> 	mov	dl, 40h
  8624 000037E2 B010                <1> 	mov	al, 10h
  8625 000037E4 EE                  <1> 	out	dx, al
  8626                              <1> 	;mov	dx, 3C1h ; VGAREG_ACTL_READ_DATA
  8627                              <1> 	; 02/08/2022
  8628 000037E5 FEC2                <1> 	inc	dl ; mov dl, 0C1h
  8629 000037E7 EC                  <1> 	in	al, dx
  8630 000037E8 80E301              <1> 	and	bl, 01h
  8631 000037EB 750C                <1> 	jnz	short set_dac_page
  8632 000037ED 247F                <1> 	and	al, 07Fh
  8633 000037EF C0E707              <1> 	shl	bh, 7
  8634 000037F2 08F8                <1> 	or	al, bh
  8635                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8636                              <1> 	; 02/08/2022
  8637 000037F4 FECA                <1> 	dec	dl ; mov dl, 0C0h
  8638 000037F6 EE                  <1> 	out	dx, al
  8639 000037F7 EB19                <1> 	jmp	short set_actl_normal
  8640                              <1> set_dac_page:
  8641                              <1> 	;push	ax
  8642                              <1> 	; 12/04/2021
  8643 000037F9 50                  <1> 	push	eax
  8644 000037FA 66BADA03            <1> 	mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8645 000037FE EC                  <1> 	in	al, dx
  8646                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8647                              <1> 	; 02/08/2022
  8648 000037FF B2C0                <1> 	mov	dl, 0C0h
  8649 00003801 B014                <1> 	mov	al, 14h
  8650 00003803 EE                  <1> 	out	dx, al
  8651                              <1> 	;pop	ax
  8652                              <1> 	; 12/04/2021
  8653 00003804 58                  <1> 	pop	eax
  8654 00003805 2480                <1> 	and	al, 80h
  8655 00003807 7503                <1> 	jnz	short set_dac_16_page
  8656 00003809 C0E702              <1> 	shl	bh, 2
  8657                              <1> set_dac_16_page:
  8658 0000380C 80E70F              <1> 	and	bh, 0Fh
  8659 0000380F 88F8                <1> 	mov	al, bh
  8660 00003811 EE                  <1> 	out	dx, al
  8661                              <1> set_actl_normal:
  8662 00003812 B020                <1> 	mov	al, 20h
  8663 00003814 EE                  <1> 	out	dx, al
  8664                              <1> 	; ifdef VBOX
  8665                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8666                              <1> 	; 02/08/2022
  8667 00003815 B2DA                <1> 	mov	dl, 0DAh
  8668 00003817 EC                  <1> 	in	al, dx
  8669                              <1> 	; endif ; VBOX
  8670 00003818 E9F1E2FFFF          <1> 	jmp	VIDEO_RETURN
  8671                              <1> 
  8672                              <1> read_video_dac_state:
  8673                              <1> 	; 10/08/2016
  8674                              <1> 	; Query DAC Color Paging State
  8675                              <1> 	; Output:
  8676                              <1> 	; BH = current active DAC color page
  8677                              <1>         ; BL = current active DAC paging mode
  8678                              <1> 
  8679 0000381D 66BADA03            <1> 	mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8680 00003821 EC                  <1> 	in	al, dx
  8681 00003822 66BAC003            <1> 	mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8682 00003826 B010                <1> 	mov	al, 10h
  8683 00003828 EE                  <1> 	out	dx, al
  8684 00003829 66BAC103            <1> 	mov	dx, 3C1h ; VGAREG_ACTL_READ_DATA
  8685 0000382D EC                  <1> 	in	al, dx
  8686 0000382E 88C3                <1> 	mov	bl, al
  8687 00003830 C0EB07              <1> 	shr	bl, 7
  8688 00003833 66BADA03            <1> 	mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8689 00003837 EC                  <1> 	in	al, dx
  8690 00003838 66BAC003            <1> 	mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8691 0000383C B014                <1> 	mov	al, 14h
  8692 0000383E EE                  <1> 	out	dx, al
  8693 0000383F 66BAC103            <1> 	mov	dx, 3C1h ; VGAREG_ACTL_READ_DATA
  8694 00003843 EC                  <1> 	in	al, dx
  8695 00003844 88C7                <1> 	mov	bh, al
  8696 00003846 80E70F              <1> 	and	bh, 0Fh
  8697 00003849 F6C301              <1> 	test	bl, 01
  8698 0000384C 7503                <1> 	jnz	short get_dac_16_page
  8699 0000384E C0EF02              <1> 	shr	bh, 2
  8700                              <1> get_dac_16_page:
  8701 00003851 66BADA03            <1> 	mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8702 00003855 EC                  <1> 	in	al, dx
  8703 00003856 66BAC003            <1> 	mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
  8704 0000385A B020                <1> 	mov	al, 20h
  8705 0000385C EE                  <1> 	out	dx, al
  8706                              <1> 	; ifdef VBOX
  8707 0000385D 66BADA03            <1> 	mov	dx, 3DAh ; VGAREG_ACTL_RESET
  8708 00003861 EC                  <1> 	in	al, dx
  8709                              <1> 	; endif ; VBOX 
  8710 00003862 66895C240C          <1> 	mov	[esp+12], bx ; bx
  8711 00003867 E9A2E2FFFF          <1> 	jmp	VIDEO_RETURN
  8712                              <1> 
  8713                              <1> ; 23/11/2020 - TRDOS 386 v2.0.3
  8714                              <1> ; VBE 2 BOCHS/QEMU emulator extensions 
  8715                              <1> ;	for TRDOS 386 v2 kernel (video bios)
  8716                              <1> 
  8717                              <1> ; BOCH/QEMU VBE2 VGA BIOS code 
  8718                              <1> ;	by Jeroen Janssen (2002)
  8719                              <1> ;	by Volker Rupper (2003-2020)
  8720                              <1> ; vbe.c (02/01/2020) 
  8721                              <1> 
  8722                              <1> ; vbe.h (02/01/2020)
  8723                              <1> 
  8724                              <1> VBE_DISPI_BANK_ADDRESS	equ	0A0000h
  8725                              <1> VBE_DISPI_BANK_SIZE_KB	equ	64
  8726                              <1> 
  8727                              <1> VBE_DISPI_MAX_XRES	equ	2560
  8728                              <1> VBE_DISPI_MAX_YRES	equ	1600
  8729                              <1> 
  8730                              <1> VBE_DISPI_IOPORT_INDEX	equ	01CEh
  8731                              <1> VBE_DISPI_IOPORT_DATA	equ	01CFh
  8732                              <1> 
  8733                              <1> VBE_DISPI_INDEX_ID	equ	00h
  8734                              <1> VBE_DISPI_INDEX_XRES	equ	01h
  8735                              <1> VBE_DISPI_INDEX_YRES	equ	02h
  8736                              <1> VBE_DISPI_INDEX_BPP	equ	03h
  8737                              <1> VBE_DISPI_INDEX_ENABLE	equ	04h
  8738                              <1> VBE_DISPI_INDEX_BANK	equ	05h
  8739                              <1> VBE_DISPI_INDEX_VIRT_WIDTH equ	06h
  8740                              <1> VBE_DISPI_INDEX_VIRT_HEIGHT equ	07h
  8741                              <1> VBE_DISPI_INDEX_X_OFFSET equ	08h
  8742                              <1> VBE_DISPI_INDEX_Y_OFFSET equ	09h
  8743                              <1> VBE_DISPI_INDEX_VIDEO_MEMORY_64K equ 0Ah
  8744                              <1> VBE_DISPI_INDEX_DDC	equ	0Bh
  8745                              <1> 
  8746                              <1> VBE_DISPI_ID0		equ	0B0C0h
  8747                              <1> VBE_DISPI_ID1		equ	0B0C1h
  8748                              <1> VBE_DISPI_ID2		equ	0B0C2h
  8749                              <1> VBE_DISPI_ID3		equ	0B0C3h
  8750                              <1> VBE_DISPI_ID4		equ	0B0C4h
  8751                              <1> VBE_DISPI_ID5		equ	0B0C5h
  8752                              <1> 
  8753                              <1> VBE_DISPI_DISABLED	equ	00h
  8754                              <1> VBE_DISPI_ENABLED	equ	01h
  8755                              <1> VBE_DISPI_GETCAPS	equ	02h
  8756                              <1> VBE_DISPI_8BIT_DAC	equ	20h
  8757                              <1> VBE_DISPI_LFB_ENABLED	equ	40h
  8758                              <1> VBE_DISPI_NOCLEARMEM	equ	80h
  8759                              <1> 
  8760                              <1> VBE_DISPI_LFB_PHYSICAL_ADDRESS equ 0E0000000h
  8761                              <1> 
  8762                              <1> ; ***
  8763                              <1> 
  8764                              <1> ;// VBE Return Status Info
  8765                              <1> ;// AL
  8766                              <1> VBE_RETURN_STATUS_SUPPORTED	equ	4Fh
  8767                              <1> VBE_RETURN_STATUS_UNSUPPORTED	equ	00h
  8768                              <1> ;// AH
  8769                              <1> VBE_RETURN_STATUS_SUCCESSFULL	equ	00h
  8770                              <1> VBE_RETURN_STATUS_FAILED	equ	01h
  8771                              <1> VBE_RETURN_STATUS_NOT_SUPPORTED	equ	02h
  8772                              <1> VBE_RETURN_STATUS_INVALID	equ	03h
  8773                              <1> 
  8774                              <1> ;// VBE Mode Numbers
  8775                              <1> 
  8776                              <1> VBE_MODE_VESA_DEFINED		equ	0100h
  8777                              <1> VBE_MODE_REFRESH_RATE_USE_CRTC	equ	0800h
  8778                              <1> VBE_MODE_LINEAR_FRAME_BUFFER	equ	4000h
  8779                              <1> VBE_MODE_PRESERVE_DISPLAY_MEMORY equ	8000h
  8780                              <1> 
  8781                              <1> ;// Mode Attributes
  8782                              <1> 
  8783                              <1> VBE_MODE_ATTRIBUTE_SUPPORTED		   equ	0001h
  8784                              <1> VBE_MODE_ATTRIBUTE_EXTENDED_INFO_AVAILABLE equ	0002h
  8785                              <1> VBE_MODE_ATTRIBUTE_COLOR_MODE		   equ	0008h
  8786                              <1> VBE_MODE_ATTRIBUTE_GRAPHICS_MODE	   equ	0010h
  8787                              <1> VBE_MODE_ATTRIBUTE_LINEAR_FRAME_BUFFER_MODE equ	0080h
  8788                              <1> VBE_MODE_ATTRIBUTE_DOUBLE_SCAN_MODE	   equ	0100h
  8789                              <1> VBE_MODE_ATTRIBUTE_INTERLACE_MODE	   equ	0200h
  8790                              <1> 
  8791                              <1> ;// Window attributes
  8792                              <1> 
  8793                              <1> VBE_WINDOW_ATTRIBUTE_RELOCATABLE equ	01h
  8794                              <1> VBE_WINDOW_ATTRIBUTE_READABLE	 equ	02h
  8795                              <1> VBE_WINDOW_ATTRIBUTE_WRITEABLE	 equ	04h
  8796                              <1> 
  8797                              <1> ;/* Video memory */
  8798                              <1> VGAMEM_GRAPH equ 0A000h
  8799                              <1> VGAMEM_CTEXT equ 0B800h
  8800                              <1> ;VGAMEM_MTEXT equ 0B000h
  8801                              <1> 
  8802                              <1> ;// Memory model
  8803                              <1> 
  8804                              <1> ;VBE_MEMORYMODEL_TEXT_MODE	equ	00h
  8805                              <1> ;VBE_MEMORYMODEL_CGA_GRAPHICS	equ	01h
  8806                              <1> ;VBE_MEMORYMODEL_PLANAR		equ	03h
  8807                              <1> VBE_MEMORYMODEL_PACKED_PIXEL	equ	04h
  8808                              <1> ;VBE_MEMORYMODEL_NON_CHAIN_4_256 equ	05h
  8809                              <1> VBE_MEMORYMODEL_DIRECT_COLOR	equ	06h
  8810                              <1> ;VBE_MEMORYMODEL_YUV		equ	07h
  8811                              <1> 
  8812                              <1> ;// DirectColorModeInfo
  8813                              <1> 
  8814                              <1> ;VBE_DIRECTCOLOR_COLOR_RAMP_PROGRAMMABLE equ 01h
  8815                              <1> VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE equ 02h
  8816                              <1> 
  8817                              <1> VBE_DISPI_TOTAL_VIDEO_MEMORY_MB	equ 16
  8818                              <1> 
  8819                              <1> ; 24/11/2020
  8820                              <1> ; vbe.c
  8821                              <1> 
  8822                              <1> %if 1
  8823                              <1> 
  8824                              <1> _vbe_biosfn_return_mode_info:
  8825                              <1> 	; 15/12/2020
  8826                              <1> 	; 12/12/2020
  8827                              <1> 	; Return VBE Mode Information	
  8828                              <1> 	; (call from 'sysvideo')
  8829                              <1> 	;
  8830                              <1> 	; Input:
  8831                              <1> 	;	cx = video (bios) mode
  8832                              <1> 	; Output:
  8833                              <1> 	;	cf = 0 -> (successful)
  8834                              <1> 	;	   MODE_INFO_LIST addr contains MODEINFO
  8835                              <1> 	;	cf = 1 -> error
  8836                              <1> 	;
  8837                              <1> 	; Modified registers: eax, edx, edi
  8838                              <1> 	;
  8839                              <1> 
  8840                              <1> 	; pushes for subroutine stack pops compatibility
  8841                              <1> 	
  8842                              <1> 	;push	ds  ; *
  8843                              <1> 	;push	es  ; **
  8844                              <1> 
  8845 0000386C 55                  <1> 	push	ebp ; ***
  8846 0000386D 56                  <1> 	push	esi ; **** 
  8847                              <1> 	
  8848 0000386E 31FF                <1> 	xor	edi, edi  ; mov edi, 0
  8849                              <1> 
  8850 00003870 803D[64090000]03    <1> 	cmp	byte [vbe3], 3
  8851 00003877 7221                <1> 	jb	short _vbe_rmi_1
  8852                              <1> 
  8853                              <1> 	;sub	edi, edi  ; 0 = kernel call (sign)
  8854                              <1> 	;	; no transfer to user's buffer
  8855                              <1> 	
  8856                              <1> 	; cx = Video mode (for 4F01h, with LFB flag)
  8857                              <1> 
  8858 00003879 66B8014F            <1> 	mov	ax, 4F01h
  8859                              <1> 
  8860 0000387D E826E0FFFF          <1> 	call	_vbe3_pmfn_return_mode_info
  8861                              <1> 
  8862 00003882 6683F84F            <1> 	cmp	ax, 004Fh
  8863 00003886 7533                <1> 	jne	short _vbe_rmi_2 ; fail
  8864                              <1> 
  8865                              <1> 	; 15/12/2020
  8866                              <1> 	; cx = vbe video mode
  8867 00003888 80E501              <1> 	and	ch, 01h ; clear LFB flag
  8868 0000388B BEFE7B0900          <1> 	mov	esi, VBE3MODEINFOBLOCK - 2
  8869 00003890 66890E              <1> 	mov	[esi], cx ; MODEINFO.mode
  8870 00003893 E8A5000000          <1> 	call	set_lfbinfo_table
  8871 00003898 EB22                <1> 	jmp	short _vbe_rmi_3  ; cf = 0 
  8872                              <1> _vbe_rmi_1:
  8873 0000389A 803D[64090000]02    <1> 	cmp	byte [vbe3], 2
  8874 000038A1 7219                <1> 	jb	short _vbe_rmi_3 ; cf = 1
  8875 000038A3 A0[65090000]        <1> 	mov	al, [vbe2bios] ; 0C0h-0C5h for emu (*)
  8876 000038A8 3CC0                <1> 	cmp	al, 0C0h ; BOCHS/QEMU/VIRTUALBOX (*) ? 
  8877 000038AA 7210                <1> 	jb	short _vbe_rmi_3  ; cf = 1
  8878 000038AC 3CC5                <1> 	cmp	al, 0C5h ; (*)
  8879 000038AE 770B                <1> 	ja	short _vbe_rmi_2 ; unknown vbios !? 
  8880                              <1> 	
  8881                              <1> 	;xor	edi, edi  ; 0 = kernel call (sign)
  8882                              <1> 	;	; no transfer to user's buffer
  8883                              <1> 
  8884                              <1> 	;mov	ax, 4F01h
  8885                              <1> 
  8886                              <1> 	; cx = Video mode (for 4F01h, with LFB flag)
  8887                              <1> 
  8888 000038B0 E80A000000          <1> 	call	vbe_biosfn_return_mode_info
  8889 000038B5 6683F84F            <1> 	cmp	ax, 004Fh ; successful ?
  8890 000038B9 7401                <1> 	je	short _vbe_rmi_3  ; cf = 0
  8891                              <1> _vbe_rmi_2:
  8892 000038BB F9                  <1> 	stc
  8893                              <1> 	; cf = 1	
  8894                              <1> _vbe_rmi_3:
  8895 000038BC 5E                  <1> 	pop	esi ; ****
  8896 000038BD 5D                  <1> 	pop	ebp ; ***
  8897                              <1> 	
  8898                              <1> 	;pop	es  ; **
  8899                              <1> 	;pop	ss  ; *
  8900                              <1> 	
  8901 000038BE C3                  <1> 	retn
  8902                              <1> 
  8903                              <1> 
  8904                              <1> ; * (TRDOS 386, INT 31h, VESA Video Bios functions) 
  8905                              <1> ; * ---------------------------------------------------------
  8906                              <1> ; * Function 01h - Return VBE Mode Information
  8907                              <1> ; * ---------------------------------------------------------
  8908                              <1> ; * Input:
  8909                              <1> ; *		AX = 4F01h
  8910                              <1> ; *		CX = Mode number
  8911                              <1> ; *    (ES:DI) EDI = Pointer to ModeInfoBlock structure	
  8912                              <1> ; * Output:
  8913                              <1> ; *		AX = VBE Return Status
  8914                              <1> ; * 
  8915                              <1> ; *----------------------------------------------------------
  8916                              <1> ; *
  8917                              <1> 
  8918                              <1> vbe_biosfn_return_mode_info:
  8919                              <1> 	; 03/08/2022 (TRDOS 386 v2.0.5)
  8920                              <1> 	; 15/12/2020 
  8921                              <1> 	; 14/12/2020
  8922                              <1> 	; 12/12/2020
  8923                              <1> 	; 11/12/2020 (TRDOS 386 v2.0.3)
  8924                              <1> 	;
  8925                              <1> 	; Input:
  8926                              <1> 	;	cx = video (bios) mode
  8927                              <1> 	;      edi = ModeInfoBlock buffer address
  8928                              <1> 	;	     (in user's memory space)
  8929                              <1> 	;      (ax = 4F01h)
  8930                              <1> 	; Output:
  8931                              <1> 	;	ax = 004Fh (successful)
  8932                              <1> 	;	ah > 0 -> error
  8933                              <1> 	;
  8934                              <1> 	; Modified registers: esi
  8935                              <1> 
  8936                              <1> 	;;push	ds  ; *
  8937                              <1> 	;;push	es  ; **
  8938                              <1> 	;;push	ebp ; ***
  8939                              <1> 	;;push	esi ; **** 
  8940                              <1> 
  8941 000038BF F6C501              <1> 	test	ch, 1
  8942 000038C2 7505                <1> 	jnz	short vbe_rmi_1
  8943                              <1> 
  8944                              <1> 	; mode number < 100h
  8945                              <1> 	; CGA/VGA mode is not proper this VBE function 
  8946                              <1> 
  8947 000038C4 29C0                <1> 	sub	eax, eax
  8948                              <1> vbe_rmi_0:	
  8949                              <1> 	;mov	ax, 0100h  ; Function is not supported
  8950 000038C6 B401                <1> 	mov	ah, 1
  8951 000038C8 C3                  <1> 	retn
  8952                              <1> vbe_rmi_1:
  8953 000038C9 52                  <1> 	push	edx ; *****
  8954 000038CA 51                  <1> 	push	ecx ; ******
  8955 000038CB 53                  <1> 	push	ebx ; *******	
  8956 000038CC 57                  <1> 	push	edi ; ********
  8957                              <1> 	
  8958                              <1> 	; 14/12/2020
  8959 000038CD 89CB                <1> 	mov	ebx, ecx
  8960                              <1>  			
  8961                              <1> 	;xor	eax, eax
  8962 000038CF 80E7C1              <1> 	and	bh, 0C1h ; use bit 15, 14, 8 only (for bh)
  8963 000038D2 883D[D10F0300]      <1> 	mov	[vbe_mode_x], bh
  8964                              <1> 	;and	bx, 1FFh
  8965 000038D8 80E701              <1> 	and	bh, 1
  8966                              <1> 	;mov	bh, 1
  8967                              <1> 
  8968                              <1> 	; Alternative 2 (instead of 'Mode_info_find_mode')
  8969 000038DB E86A060000          <1> 	call	set_mode_info_list ; (alternative 2)
  8970                              <1> 
  8971                              <1> 	; eax = 0	
  8972                              <1> 
  8973                              <1> 	;mov	bx, [esi] ; mode
  8974                              <1> 
  8975                              <1> 	; Alternative 1 (instead of 'set_mode_info_list')
  8976                              <1> 	;call	mode_info_find_mode ; (alternative 1)
  8977                              <1> 
  8978 000038E0 09F6                <1> 	or	esi, esi
  8979                              <1> 	; 14/12/2020
  8980 000038E2 744C                <1> 	jz	short vbe_rmi_4	; VBE mode number is wrong
  8981                              <1> 				; or it is not supported
  8982                              <1> 
  8983                              <1> 	; 15/12/2020
  8984                              <1> 	;mov	bx, [esi] ; mode
  8985                              <1> 
  8986                              <1> 	; 12/12/2020
  8987                              <1> 	;call	set_lfbinfo_table
  8988                              <1> 
  8989 000038E4 F605[D10F0300]40    <1> 	test	byte [vbe_mode_x], 40h ; LFB model ?
  8990 000038EB 7404                <1> 	jz	short vbe_rmi_2
  8991                              <1> 	
  8992 000038ED C6461C01            <1> 	mov	byte [esi+MODEINFO.NumberOfBanks], 1
  8993                              <1> vbe_rmi_2:
  8994                              <1> 	; (vbe.c, 02/01/2020, vruppert)
  8995                              <1> 	; 11/12/2020 (Erdogan Tan, video.s) 
  8996                              <1> 	; Bochs Graphics Adapter
  8997                              <1> 	; vendor_id: 1111h, device id: 1234h
  8998                              <1> 
  8999 000038F1 E835070000          <1> 	call	pci_get_lfb_addr
  9000                              <1> 	;or	eax, eax
  9001 000038F6 7404                <1> 	jz	short vbe_rmi_3
  9002                              <1> 	; zf = 0, ax > 0 (high word of LFB address)
  9003                              <1> 	; set/change LFB address in MODEINFO structure
  9004 000038F8 6689462C            <1> 	mov	[esi+MODEINFO.PhysBasePtr+2], ax
  9005                              <1> 	; 12/12/2020
  9006                              <1> 	;mov	[edi+LFBINFO.LFB_addr+2], ax
  9007                              <1> vbe_rmi_3:
  9008                              <1> 	;test	byte [esi+MODEINFO.WinAAttributes], 1 
  9009                              <1> 	;		; VBE_WINDOW_ATTRIBUTE_RELOCATABLE = 1
  9010                              <1>         ;jz	short vbe_rmi_4
  9011                              <1> 	;; 11/12/2020
  9012                              <1> 	;; In fact, this is far call address in (Bochs/BGA) Video Bios
  9013                              <1> 	;; Direct user access to kernel subroutines is not possible 
  9014                              <1> 	;; in TRDOS 386. Also, TRDOS 386 kernel will support only LFB.
  9015                              <1> 	;; Bank select may be a seperate sysvideo function in future
  9016                              <1> 	;; (if it will be required).
  9017                              <1> 	;mov	dword [esi+MODEINFO.WinFuncPtr], dispi_set_bank_farcall
  9018                              <1> ;vbe_rmi_4:
  9019                              <1> 	; 12/12/2020
  9020 000038FC E83C000000          <1> 	call	set_lfbinfo_table
  9021                              <1> 
  9022                              <1> 	; 11/12/2020
  9023                              <1> 	; copy 68 bytes of MODE_INFO_LIST to user
  9024                              <1> 
  9025 00003901 8B3C24              <1> 	mov	edi, [esp]  ; user's buffer address
  9026                              <1> 	; 12/12/2020
  9027 00003904 09FF                <1> 	or	edi, edi ; 0 = kernel call 
  9028                              <1> 			 ; (call from '_vbe_biosfn_return_mode_info')
  9029 00003906 7431                <1> 	jz	short vbe_rmi_6
  9030                              <1> 
  9031                              <1> 	; 15/12/2020
  9032                              <1> 	; prepare 256 bytes MODEINFO buffer at VBE3MODEINFOBLOCK
  9033                              <1> 	; and then, copy buffer conttent to user's buffer
  9034 00003908 57                  <1> 	push	edi
  9035 00003909 BE[F00F0300]        <1> 	mov	esi, MODE_INFO_LIST + 2	; MODEINFO.ModeAttributes
  9036 0000390E BF007C0900          <1> 	mov	edi, VBE3MODEINFOBLOCK
  9037                              <1> 	;mov	ecx, 66/4  ; 66 bytes
  9038                              <1> 	; 03/08/2022
  9039 00003913 29C9                <1> 	sub	ecx, ecx
  9040 00003915 B110                <1> 	mov	cl, 66/4
  9041 00003917 F3A5                <1> 	rep	movsd
  9042 00003919 31C0                <1> 	xor	eax, eax
  9043 0000391B B12F                <1> 	mov	cl, (256-68)/4 ; 188 bytes
  9044 0000391D F3AB                <1> 	rep	stosd
  9045 0000391F 66AB                <1> 	stosw	; 2 bytes
  9046 00003921 5F                  <1> 	pop	edi
  9047 00003922 BE007C0900          <1> 	mov	esi, VBE3MODEINFOBLOCK
  9048                              <1> 	;mov	cx, 256 
  9049 00003927 FEC5                <1> 	inc	ch ; cx = 256
  9050 00003929 E87BD40000          <1> 	call	transfer_to_user_buffer
  9051 0000392E 7309                <1> 	jnc	short vbe_rmi_5
  9052                              <1> vbe_rmi_4:
  9053                              <1> 	;mov	eax, 014Fh ; fail/error
  9054 00003930 31C0                <1> 	xor	eax, eax
  9055 00003932 B401                <1> 	mov	ah, 01h
  9056                              <1> 	;jmp	short vbe_rmi_6
  9057 00003934 E981000000          <1> 	jmp	vbe_sm_ret1 ; 11/12/2020
  9058                              <1> vbe_rmi_5:
  9059                              <1> 	; 256 bytes of MODEINFO have been transferred to user
  9060                              <1> 	;mov	eax, 4Fh ; succesfull
  9061                              <1> vbe_rmi_6: ; 12/12/2020
  9062 00003939 31C0                <1> 	xor	eax, eax
  9063                              <1> ;vbe_rmi_6:
  9064 0000393B EB7D                <1> 	jmp	vbe_sm_ret1 ; 11/12/2020
  9065                              <1> 
  9066                              <1> 	;pop	edi ; ********
  9067                              <1> 	;pop	ebx ; *******
  9068                              <1> 	;pop	ecx ; ******
  9069                              <1> 	;pop	edx ; *****	
  9070                              <1> 	
  9071                              <1> 	;;pop	esi ; ****
  9072                              <1> 	;;pop	ebp ; ***
  9073                              <1> 	;;pop	es  ; **
  9074                              <1> 	;;pop	ds  ; * 
  9075                              <1> 
  9076                              <1> 	;retn
  9077                              <1> 
  9078                              <1> set_lfbinfo_table:
  9079                              <1> 	; 19/12/2020
  9080                              <1> 	; 11/12/2020
  9081                              <1> 	; Set/Fill LFBINFO structure/table
  9082                              <1> 	;
  9083                              <1> 	; Input:
  9084                              <1> 	;	esi = Mode info list address 
  9085                              <1> 	; Output:
  9086                              <1> 	;	LFB_Info address is filled with LFBINFO
  9087                              <1> 	;	edi = LFB_Info address
  9088                              <1> 	;
  9089                              <1> 	; Modified registers: eax, edx (=0), edi
  9090                              <1> 
  9091 0000393D BF[DE0F0300]        <1> 	mov	edi, LFB_Info
  9092 00003942 8B462A              <1> 	mov	eax, [esi+MODEINFO.PhysBasePtr]
  9093 00003945 894702              <1> 	mov	[edi+LFBINFO.LFB_addr], eax ; LFB address
  9094                              <1> 	;mov	ax, [esi+MODEINFO.mode]
  9095 00003948 668B06              <1> 	mov	ax, [esi]
  9096 0000394B 668907              <1> 	mov	[edi+LFBINFO.mode],ax
  9097 0000394E 8A461B              <1> 	mov	al, [esi+MODEINFO.BitsPerPixel]
  9098 00003951 88470E              <1> 	mov	[edi+LFBINFO.bpp], al
  9099 00003954 29C0                <1> 	sub	eax, eax
  9100 00003956 668B4614            <1> 	mov	ax, [esi+MODEINFO.XResolution]
  9101 0000395A 6689470A            <1> 	mov	[edi+LFBINFO.X_res], ax
  9102 0000395E 89C2                <1> 	mov	edx, eax ; 19/12/2020
  9103 00003960 668B4616            <1> 	mov	ax, [esi+MODEINFO.YResolution]
  9104 00003964 6689470C            <1> 	mov	[edi+LFBINFO.Y_res], ax
  9105                              <1> 	; eax = Y_res ; screen height
  9106                              <1> 	; 19/12/2020	
  9107 00003968 F7E2                <1> 	mul	edx ; X_res*Y_res
  9108                              <1> 	; edx = 0
  9109 0000396A 8A570E              <1> 	mov	dl, [edi+LFBINFO.bpp]
  9110                              <1> 	; Note:
  9111                              <1> 	; Bits per pixel may be 8,16,24,32 for TRDOS 386 v2.
  9112                              <1> 	; (4 bits for pixel is not used for VESA modes here)
  9113 0000396D C0EA03              <1> 	shr	dl, 3 ; convert bits to byte
  9114 00003970 F7E2                <1> 	mul	edx
  9115                              <1> 	; eax = screen/page/buffer size in bytes
  9116 00003972 894706              <1> 	mov	[edi+LFBINFO.LFB_size], eax
  9117                              <1> 	; edx = 0
  9118                              <1> 	; clear reserved byte in LFBINFO structure/table
  9119 00003975 88570F              <1> 	mov	[edi+LFBINFO.reserved], dl ; not necessary
  9120 00003978 C3                  <1> 	retn
  9121                              <1> 
  9122                              <1> ; * (TRDOS 386, INT 31h, VESA Video Bios functions) 
  9123                              <1> ; * ---------------------------------------------------------
  9124                              <1> ; * Function 02h - Set VBE Mode
  9125                              <1> ; * ---------------------------------------------------------
  9126                              <1> ; * Input:
  9127                              <1> ; *		AX = 4F02h
  9128                              <1> ; *		BX = Desired Mode to set
  9129                              <1> ; * Output:
  9130                              <1> ; *		AX = VBE Return Status
  9131                              <1> ; * 
  9132                              <1> ; *----------------------------------------------------------
  9133                              <1> ; *
  9134                              <1> 
  9135                              <1> vbe_biosfn_set_mode:
  9136                              <1> 	; 07/03/2021
  9137                              <1> 	; 12/12/2020
  9138                              <1> 	; 11/12/2020 (LFBINFO table for VESA VBE modes)
  9139                              <1> 	; 27/11/2020
  9140                              <1> 	; 25/11/2020
  9141                              <1> 	; 23/11/2020 (TRDOS 386 v2.0.3)
  9142                              <1> 	; (ref: vbe.c, 02/01/2020, vruppert)
  9143                              <1> 	;
  9144                              <1> 	; Input:
  9145                              <1> 	;	bx = video (bios) mode
  9146                              <1> 	;	ax = 4F02h
  9147                              <1> 	; Output:
  9148                              <1> 	;	ax = 004Fh (successful)
  9149                              <1> 	;	ah > 0 -> error
  9150                              <1> 	;
  9151                              <1> 	; Modified registers: esi
  9152                              <1> 
  9153                              <1> 	; 27/11/2020
  9154                              <1> 
  9155                              <1> 	;;push	ds  ; *
  9156                              <1> 	;;push	es  ; **
  9157                              <1> 	;;push	ebp ; ***
  9158                              <1> 	;;push	esi ; **** 
  9159                              <1> 	
  9160                              <1> 	; 11/12/2020 			
  9161 00003979 52                  <1> 	push	edx ; *****
  9162 0000397A 51                  <1> 	push	ecx ; ******
  9163 0000397B 53                  <1> 	push	ebx ; *******	
  9164 0000397C 57                  <1> 	push	edi ; ********
  9165                              <1> 
  9166                              <1> 	;xor	eax, eax
  9167 0000397D 80E7C1              <1> 	and	bh, 0C1h ; use bit 15, 14, 8 only (for bh)
  9168 00003980 883D[D10F0300]      <1> 	mov	[vbe_mode_x], bh
  9169 00003986 80E701              <1> 	and	bh, 1
  9170 00003989 753C                <1> 	jnz	short vbe_sm_3  ; VESA VBE mode
  9171                              <1> 
  9172                              <1>  	;;test	bx, 4000h ; VBE_MODE_LINEAR_FRAME_BUFFER
  9173                              <1> 	;test	bh, 40h
  9174                              <1> 	;jz	short vbe_sm_0
  9175                              <1> 	;; lfb_flag
  9176                              <1> 	;mov	al, 40h	; VBE_DISPI_LFB_ENABLED
  9177                              <1> vbe_sm_0:
  9178                              <1> 	; 27/11/2020
  9179 0000398B B080                <1> 	mov	al, 80h
  9180                              <1> 	;test	bh, 80h ; VBE_MODE_PRESERVE_DISPLAY_MEMORY 	
  9181                              <1> 	;jnz	short vbe_sm_1 ; no_clear
  9182                              <1> 	;; clear
  9183                              <1> 	;sub	al, al ; 0
  9184 0000398D 8405[D10F0300]      <1> 	test	[vbe_mode_x], al ; 80h
  9185 00003993 7402                <1> 	jz	short vbe_sm_1 ; clear display memory
  9186                              <1> 	; no_clear
  9187 00003995 08C3                <1> 	or	bl, al ; VBE_MODE_PRESERVE_DISPLAY_MEMORY
  9188                              <1> vbe_sm_1:
  9189                              <1> 	; check non vesa mode
  9190                              <1> 	;;cmp	bx, 100h ; VBE_MODE_VESA_DEFINED
  9191                              <1> 	;;jna	short vbe_sm_2
  9192                              <1> 	;and	bh, 1
  9193                              <1> 	;jnz	short vbe_sm_3 
  9194                              <1> 
  9195                              <1> 	; BX <= 1FFh
  9196                              <1> 
  9197                              <1> 	; 27/11/2020
  9198                              <1> 	;or	bl, al	; al = 80h if no_clear option is set 
  9199                              <1> 	;		; al = 0 if no_clear option is not set 
  9200                              <1> 
  9201                              <1> 	; 25/11/2020
  9202                              <1> 	; VBE DISPI will be disabled in 'biosfn_set_video_mode'
  9203                              <1>  
  9204                              <1> 	;xor	al, al ; 0 ; VBE_DISPI_DISABLED
  9205                              <1> 	;call	dispi_set_enable
  9206                              <1> 
  9207                              <1> 	; call the vgabios in order to set the video mode
  9208                              <1> 	; this allows for going back to textmode with a VBE call
  9209                              <1> 	; (some applications expect that to work)
  9210                              <1> 
  9211                              <1> 	;and	bx, 0FFh
  9212                              <1> 	
  9213                              <1> 	; 27/11/2020
  9214                              <1> biosfn_set_video_mode:
  9215                              <1> 	; _call: call subroutine
  9216                              <1> 	; 26/11/2020 (TRDOS 386 v2.0.3)
  9217                              <1> 	; (ref: vgabios.c, 02/01/2020, vruppert)
  9218                              <1> 	; Input:
  9219                              <1> 	;	bl = VGA video (bios) mode
  9220                              <1> 	; Output:
  9221                              <1> 	;	cf = 1 -> error
  9222                              <1> 	;	cf = 0 -> ok
  9223                              <1> 	;
  9224                              <1> 	; Modified registers: esi
  9225                              <1> 
  9226                              <1> 	; 'dispi_set_enable(VBE_DISPI_DISABLED);'
  9227                              <1> 	
  9228                              <1> 	;mov	ax, 0 ; VBE_DISPI_DISABLED 
  9229 00003997 31C0                <1> 	xor	eax, eax ; 0 
  9230 00003999 E89C040000          <1> 	call	dispi_set_enable
  9231                              <1> 	
  9232 0000399E 88D8                <1> 	mov	al, bl
  9233                              <1> 	;jmp	_set_mode ; (in 'biosfn_set_video_mode' sub)
  9234 000039A0 E87AE1FFFF          <1> 	call	_set_mode ; will return with cf=1 only if
  9235                              <1> 			; desired mode is not implemented
  9236                              <1> 	; _retn: return from subroutine
  9237 000039A5 721A                <1> 	jc	short vbe_sm_2 ; 25/11/2020
  9238                              <1> 
  9239                              <1> 	; 26/11/2020
  9240 000039A7 31C0                <1> 	xor	eax, eax 
  9241 000039A9 A0[1E670000]        <1> 	mov	al, [CRT_MODE]
  9242                              <1> 	; 27/11/2020
  9243 000039AE 8A25[DB830100]      <1> 	mov	ah, [noclearmem] ; 80h or 0
  9244                              <1> 	;and	ah 80h
  9245 000039B4 66A3[D20F0300]      <1> 	mov	[video_mode], ax ; bit 15 = no_clear flag
  9246                              <1> 				 ; bit 14 = 0 (not LFB model)
  9247                              <1> vbe_sm_ret1:
  9248                              <1> 	; 11/12/2020
  9249                              <1> 	; (vbe_rmi_4 and vbe_rmi_6 jump here)
  9250                              <1> 	; 27/11/2020
  9251 000039BA B04F                <1> 	mov	al, 4Fh ; Function call successful
  9252                              <1> 	; eax = 004Fh
  9253                              <1> vbe_sm_ret2:
  9254                              <1> 	; 11/12/2020
  9255 000039BC 5F                  <1> 	pop	edi ; ********
  9256 000039BD 5B                  <1> 	pop	ebx ; *******
  9257 000039BE 59                  <1> 	pop	ecx ; ******
  9258 000039BF 5A                  <1> 	pop	edx ; *****
  9259                              <1> 
  9260                              <1> 	;;pop	esi ; ****
  9261                              <1> 	;;pop	ebp ; ***
  9262                              <1> 	;;pop	es  ; **
  9263                              <1> 	;;pop	ds  ; * 
  9264                              <1> 
  9265 000039C0 C3                  <1> 	retn
  9266                              <1> 
  9267                              <1> vbe_sm_2:
  9268                              <1> 	;mov	ax, 0100h ; Function is not supported
  9269                              <1> 	; 27/11/2020
  9270 000039C1 31C0                <1> 	xor	eax, eax
  9271 000039C3 B401                <1> 	mov	ah, 01h
  9272                              <1> 	; eax = 0100h
  9273                              <1> 	;retn
  9274 000039C5 EBF5                <1> 	jmp	short vbe_sm_ret2
  9275                              <1> 
  9276                              <1> vbe_sm_3:
  9277                              <1> 	; 12/12/2020
  9278                              <1> 	; check current mode, if it is 03h
  9279                              <1> 	; save page contents and cursor positions
  9280 000039C7 803D[1E670000]03    <1> 	cmp	byte [CRT_MODE], 03h
  9281                              <1> 	;jne	short vbe_sm_0
  9282 000039CE 7505                <1> 	jne	short vbe_sm_4 ; 07/03/2021
  9283 000039D0 E8ECE3FFFF          <1> 	call	save_mode3_multiscreen
  9284                              <1> 	; set current mode to extended (SVGA) mode
  9285                              <1> 	;mov	byte [CRT_MODE], 0FFh ; VESA VBE mode
  9286                              <1> vbe_sm_4:
  9287                              <1> 	; 27/11/2020
  9288                              <1> 	; bx = mode (bit 0 to 8)
  9289                              <1> 
  9290                              <1> 	; 25/11/2020
  9291                              <1> 
  9292                              <1> 	; Alternative 2 (instead of 'Mode_info_find_mode')
  9293                              <1> 	;push	edi
  9294 000039D5 E870050000          <1> 	call	set_mode_info_list ; (alternative 2)
  9295                              <1> 	;pop	edi
  9296                              <1> 
  9297                              <1> 	;mov	bx, [esi] ; mode
  9298                              <1> 
  9299                              <1> 	; Alternative 1 (instead of 'set_mode_info_list')
  9300                              <1> 	;call	mode_info_find_mode ; (alternative 1)
  9301                              <1> 
  9302 000039DA 09F6                <1> 	or	esi, esi
  9303 000039DC 74E3                <1> 	jz	short vbe_sm_2 ; VBE mode number is wrong
  9304                              <1> 			       ; or it is not supported
  9305                              <1> 
  9306                              <1> 	; 11/12/2020
  9307 000039DE 668B1E              <1> 	mov	bx, [esi] ; mode
  9308                              <1> 
  9309                              <1> 	; 27/11/2020
  9310 000039E1 0A3D[D10F0300]      <1> 	or	bh, [vbe_mode_x]
  9311                              <1> 
  9312                              <1> 	; save VESA VBE mode
  9313 000039E7 66891D[D20F0300]    <1> 	mov	[video_mode], bx
  9314                              <1> 		; 27/11/2020
  9315                              <1> 		; bit 0 to 8 = VESA VBE mode
  9316                              <1> 		; bit 9 to 13 = 0 (bit 0 to 13 = mode)
  9317                              <1> 		; bit 14 = Linear/Flat Frame Buffer flag
  9318                              <1> 		; bit 15 = 'memory not cleared
  9319                              <1> 		;	   at last mode set' flag
  9320                              <1> 
  9321                              <1> 	; first disable current mode
  9322                              <1> 	; (when switching between vesa modes)
  9323                              <1> 	; 'dispi_set_enable(VBE_DISPI_DISABLED);'
  9324                              <1> 
  9325                              <1> 	;mov	ax, VBE_DISPI_DISABLED ; 0
  9326 000039EE 29C0                <1> 	sub	eax, eax ; 0
  9327                              <1> 
  9328 000039F0 E845040000          <1> 	call	dispi_set_enable
  9329                              <1> 
  9330                              <1> 	; 11/12/2020
  9331 000039F5 8A461B              <1> 	mov	al, [esi+MODEINFO.BitsPerPixel]
  9332                              <1> 	; ah = 0
  9333                              <1> 
  9334                              <1> 	;cmp	byte [esi+MODEINFO.BitsPerPixel], 8
  9335 000039F8 3C08                <1> 	cmp	al, 8
  9336 000039FA 750B                <1> 	jne	short vbe_sm_5
  9337                              <1> 
  9338                              <1> 	; 11/12/2020
  9339                              <1> 	;push	edi
  9340 000039FC 50                  <1> 	push	eax
  9341                              <1> 	; 'load_dac_palette(3);'
  9342 000039FD 56                  <1> 	push	esi
  9343 000039FE B403                <1> 	mov	ah, 3  ; palette3, 256 colors
  9344 00003A00 E8BBF1FFFF          <1> 	call	load_dac_palette
  9345 00003A05 5E                  <1> 	pop	esi
  9346                              <1> 	; 11/12/2020
  9347 00003A06 58                  <1> 	pop	eax
  9348                              <1> 	;pop	edi
  9349                              <1> vbe_sm_5:	
  9350                              <1>   	;'dispi_set_bpp(cur_info->info.BitsPerPixel);'
  9351                              <1> 	; 11/12/2020 (al = bits per pixel, ah = 0)
  9352                              <1> 	;xor	ah, ah
  9353                              <1> 	;mov	al, [esi+MODEINFO.BitsPerPixel]
  9354 00003A07 E841040000          <1> 	call	dispi_set_bpp
  9355                              <1>         ;'dispi_set_xres(cur_info->info.XResolution);'
  9356 00003A0C 668B4614            <1> 	mov	ax, [esi+MODEINFO.XResolution]
  9357 00003A10 E83E040000          <1> 	call	dispi_set_xres
  9358                              <1>         ;'dispi_set_yres(cur_info->info.YResolution);'
  9359 00003A15 668B4616            <1> 	mov	ax, [esi+MODEINFO.YResolution]
  9360 00003A19 E83B040000          <1> 	call	dispi_set_yres
  9361                              <1> 
  9362                              <1> 	;'dispi_set_bank(0);'
  9363                              <1> 	;xor	ax, ax
  9364 00003A1E 31C0                <1> 	xor	eax, eax ; 0
  9365 00003A20 E83A040000          <1> 	call	dispi_set_bank
  9366                              <1>         ;'dispi_set_enable(VBE_DISPI_ENABLED|no_clear|lfb_flag);'
  9367                              <1> 	;mov	ax, di
  9368                              <1> 	; ah = 0 ; 27/11/2020
  9369 00003A25 A0[D10F0300]        <1> 	mov	al, [vbe_mode_x] ; restore VBE mode bit 14 & 15
  9370 00003A2A 0C01                <1> 	or	al, 1 ; VBE_DISPI_ENABLED
  9371 00003A2C E809040000          <1> 	call	dispi_set_enable
  9372                              <1> 
  9373                              <1>         ; 'vga_compat_setup();'
  9374 00003A31 E83E040000          <1> 	call	vga_compat_setup
  9375                              <1> 
  9376                              <1> 	; 11/12/2020
  9377 00003A36 E802FFFFFF          <1> 	call	set_lfbinfo_table
  9378                              <1> 
  9379                              <1> 	; 26/11/2020
  9380 00003A3B 31C0                <1> 	xor	eax, eax
  9381 00003A3D FEC8                <1> 	dec	al 
  9382 00003A3F A2[1E670000]        <1> 	mov	[CRT_MODE], al ; 0FFh = VESA VBE mode sign
  9383                              <1> 
  9384                              <1> 	; 27/11/2020
  9385 00003A44 E971FFFFFF          <1> 	jmp	vbe_sm_ret1 ; Function call successful
  9386                              <1> 	
  9387                              <1> 	; 27/11/2020
  9388                              <1> 	;mov	al, 4Fh
  9389                              <1> 	;	; eax = 004Fh = Function call successful
  9390                              <1> 	;jmp	short vbe_sm_ret2
  9391                              <1> 
  9392                              <1> ; * (TRDOS 386, INT 31h, VESA Video Bios functions)
  9393                              <1> ; * ---------------------------------------------------------
  9394                              <1> ; * Function 03h - Return Current VBE Mode
  9395                              <1> ; * ---------------------------------------------------------
  9396                              <1> ; * Input:
  9397                              <1> ; *		AX = 4F03h
  9398                              <1> ; * Output:
  9399                              <1> ; *		AX = VBE Return Status
  9400                              <1> ; *		BX = Current VBE Mode
  9401                              <1> ; * 
  9402                              <1> ; *----------------------------------------------------------
  9403                              <1> ; *
  9404                              <1> 
  9405                              <1> vbe_biosfn_return_current_mode:
  9406                              <1> 	; 11/12/2020
  9407                              <1> 	; 27/11/2020 (TRDOS 386 v2.0.3)
  9408                              <1> 	; (ref: vbe.c, 02/01/2020, vruppert)
  9409                              <1> 	;
  9410                              <1> 	; Input:
  9411                              <1> 	;	none
  9412                              <1> 	; Output:
  9413                              <1> 	;	ax = 004Fh (successful)
  9414                              <1> 	;	ah > 0 -> error
  9415                              <1> 	;	bx = current video (bios) mode (if ah = 0)
  9416                              <1> 	;
  9417                              <1> 	; Modified registers: eax, ebx
  9418                              <1> 
  9419                              <1> 	; 27/11/2020
  9420                              <1> 
  9421                              <1> 	;;push	ds  ; *
  9422                              <1> 	;;push	es  ; **
  9423                              <1> 	;;push	ebp ; ***
  9424                              <1> 	;;push	esi ; **** 
  9425                              <1> 	 			
  9426                              <1> 	;push	edx ; *****
  9427                              <1> 
  9428                              <1> 	; (vbe.c)
  9429                              <1> 	;call	dispi_get_enable
  9430                              <1> 	;	; ax = vbe display interface status
  9431                              <1> 	;and	al, 1 ; VBE_DISPI_ENABLED
  9432                              <1> 	;jnz	short vbe_gm_1  ; VBE graphics mode
  9433                              <1> 
  9434 00003A49 A0[1E670000]        <1> 	mov	al, [CRT_MODE] ; current cga/vga mode
  9435 00003A4E 3CFF                <1> 	cmp	al, 0FFh ; VBE extension signature
  9436 00003A50 720E                <1> 	jb	short vbe_gm_1 ; get CGA/VGA mode
  9437                              <1> 
  9438                              <1> 	; get VBE mode
  9439                              <1> vbe_gm_0:
  9440 00003A52 66A1[D20F0300]      <1> 	mov	ax, [video_mode]
  9441                              <1> 		; BX bits:
  9442                              <1> 		; bit 0 to 8 = VESA VBE video mode
  9443                              <1> 		; bit 9 to 13 = 0 
  9444                              <1> 		; bit 14 = last mode set LFB option
  9445                              <1> 		;	   1 - linear/flat frame buffer
  9446                              <1> 		;	   0 - windowed frame buffer
  9447                              <1> 		; bit 15 = last mode set no_clear option
  9448                              <1> 		;	   0 - video memory cleared
  9449                              <1> 		;	   1 - video memory not cleared
  9450                              <1> 	
  9451                              <1> vbe_gm_return:
  9452                              <1> 	;pop	edx ; ******
  9453 00003A58 0FB7D8              <1> 	movzx	ebx, ax
  9454                              <1> ;vbe_srs_retn:
  9455 00003A5B 31C0                <1> 	xor	eax, eax ; 0
  9456 00003A5D B04F                <1> 	mov	al, 4Fh ; ax = 004Fh (successful)
  9457 00003A5F C3                  <1> 	retn	
  9458                              <1> 
  9459                              <1> vbe_gm_1:
  9460                              <1> 	; legacy (old, standard) CGA/VGA bios video mode
  9461 00003A60 8A25[DB830100]      <1> 	mov	ah, [noclearmem] ; 80h or 0
  9462                              <1> 		; BX bits: 
  9463                              <1> 		; bit 0 to 7 = video mode
  9464                              <1> 		; bit 8 to 13 = 0 
  9465                              <1> 		; bit 14 = 0 (not LFB mode) CGA/VGA
  9466                              <1> 		; bit 15 = 1 if [noclearmem] = 80h
  9467                              <1> 		;	   0 if [noclearmem] = 0
  9468 00003A66 EBF0                <1> 	jmp	short vbe_gm_return
  9469                              <1> 
  9470                              <1> ; * (TRDOS 386, INT 31h, VESA Video Bios functions) 
  9471                              <1> ; * ---------------------------------------------------------
  9472                              <1> ; * Function 04h - Save/Restore State
  9473                              <1> ; * ---------------------------------------------------------
  9474                              <1> ; * Input:
  9475                              <1> ; *		AX = 4F04h
  9476                              <1> ; *             DL = 00h Return Save/Restore State buff size
  9477                              <1> ; *                  01h Save State
  9478                              <1> ; *                  02h Restore State
  9479                              <1> ; *             CX = Requested states
  9480                              <1> ; *		     bit 0 - controller hardware state
  9481                              <1> ; *		     bit 1 - BIOS data state
  9482                              <1> ; *		     bit 2 - DAC state
  9483                              <1> ; *		     bit 3 - register state
  9484                              <1> ; *    (ES:BX) EBX = Pointer to buffer (if DL <> 00h)
  9485                              <1> ; * Output:
  9486                              <1> ; *		AX = VBE Return Status
  9487                              <1> ; *		BX = Number of 64-byte blocks 
  9488                              <1> ; *		     to hold the state buffer (if DL=00h)
  9489                              <1> ; * 
  9490                              <1> ; *----------------------------------------------------------
  9491                              <1> ; *
  9492                              <1> 
  9493                              <1> vbe_biosfn_save_restore_state:
  9494                              <1> 	; 23/01/2021
  9495                              <1> 	; 16/01/2021
  9496                              <1> 	; 14/01/2021
  9497                              <1> 	; 13/01/2021
  9498                              <1> 	; 12/01/2021
  9499                              <1> 	; 11/01/2021 (TRDOS 386 v2.0.3)
  9500                              <1> 	; (ref: vbe.c, 02/01/2020, vruppert)
  9501                              <1> 	;
  9502                              <1> 	; Input:
  9503                              <1> 	;	dl = sub function
  9504                              <1> 	;	cl = requested state
  9505                              <1> 	;      ebx = pointer to buffer (if dl<>00h) 
  9506                              <1> 	; Output:
  9507                              <1> 	;	ax = 004Fh (successful)
  9508                              <1> 	;	ah > 0 -> error
  9509                              <1> 	;	bx = Number of 64-byte blocks 
  9510                              <1> 	;	     to hold the state buffer (if DL=00h)
  9511                              <1> 
  9512                              <1> 	; Modified registers: eax, ebx, edi
  9513                              <1> 	
  9514                              <1> 	; 14/01/2021
  9515 00003A68 09DB                <1> 	or	ebx, ebx ; user's buffer address
  9516 00003A6A 750A                <1> 	jnz	short _vbe_biosfn_save_restore_state
  9517                              <1> 
  9518 00003A6C 20D2                <1> 	and	dl, dl
  9519 00003A6E 7406                <1> 	jz	short _vbe_biosfn_save_restore_state
  9520                              <1> 
  9521                              <1> 	; function failed
  9522                              <1> 	;mov	eax, 0100h
  9523                              <1> 	;xor	eax, eax
  9524                              <1> 	;inc	ah  ; eax = 0100h
  9525                              <1> 	; 16/01/2021
  9526 00003A70 B84F010000          <1> 	mov	eax, 014Fh
  9527 00003A75 C3                  <1> 	retn
  9528                              <1> 
  9529                              <1> _vbe_biosfn_save_restore_state:
  9530                              <1> 	; 23/01/2021
  9531                              <1> 	; 14/01/2021
  9532                              <1> 	; ebx = 0 if the caller is kernel ('sysvideo')
  9533                              <1> 
  9534                              <1> 	; 13/01/2021
  9535 00003A76 57                  <1> 	push	edi
  9536 00003A77 52                  <1> 	push	edx
  9537 00003A78 51                  <1> 	push	ecx
  9538                              <1> 
  9539                              <1> 	; 23/01/2021
  9540                              <1> 	; 12/01/2021
  9541 00003A79 80FA02              <1> 	cmp	dl, 2
  9542 00003A7C 7757                <1> 	ja	short vbe_srs_7 ; 23/01/2021
  9543                              <1> 			; invalid sub function
  9544 00003A7E 83F90F              <1> 	cmp	ecx, 0Fh
  9545 00003A81 7752                <1> 	ja	short vbe_srs_7 ; invalid !
  9546                              <1> 	
  9547 00003A83 20D2                <1> 	and	dl, dl
  9548 00003A85 7515                <1> 	jnz	short vbe_srs_4
  9549                              <1> 
  9550                              <1> 	; DL = 0
  9551                              <1> 	; Return Save/Restore State buffer size
  9552                              <1> 
  9553                              <1> 	;mov	ebx, ecx
  9554                              <1> 	;shl	bl, 1
  9555                              <1> 	;mov	bx, [ebx+vbestatebufsize]
  9556 00003A87 E881000000          <1> 	call	vbe_srs_gbs
  9557                              <1> 
  9558                              <1> ;	; 11/01/2021
  9559                              <1> ;	test	cl, 8
  9560                              <1> ;	jz	short vbe_srs_3
  9561                              <1> ;	; vbe_biosfn_read_video_state_size();
  9562                              <1> ;	; return 9 * 2;
  9563                              <1> ;	mov	bl, 18 ; register state size
  9564                              <1> ;vbe_srs_0:
  9565                              <1> ;	test	cl, 1
  9566                              <1> ;	jz	short vbe_srs_1
  9567                              <1> ;	; size += 0x46;
  9568                              <1> ;	add	bl, 70	; controller state size
  9569                              <1> ;vbe_srs_1:
  9570                              <1> ;	test	cl, 2
  9571                              <1> ;	jz	short vbe_srs_2
  9572                              <1> ;	; size += (5 + 8 + 5) * 2 + 6;
  9573                              <1> ;	;add	bl, 42 ; BIOS data state size ; Bochs/Plex86
  9574                              <1> ;	; 12/01/2021
  9575                              <1> ;	add	bl, 40 ; TRDOS 386 v2 VBIOS data state size
  9576                              <1> ;vbe_srs_2:
  9577                              <1> ;	test	cl, 4
  9578                              <1> ;	jz	short vbe_srs_3
  9579                              <1> ;	; size += 3 + 256 * 3 + 1;
  9580                              <1> ;	add	bx, 772 ; DAC state size
  9581                              <1> 
  9582                              <1> vbe_srs_3:
  9583 00003A8C 6683C33F            <1> 	add	bx, 63
  9584 00003A90 66C1EB06            <1> 	shr	bx, 6 ; / 64
  9585                              <1> 
  9586                              <1> vbe_srs_retn:
  9587 00003A94 31C0                <1> 	xor	eax, eax ; 0
  9588                              <1> vbe_srs_0:  ; 16/01/2021
  9589 00003A96 B04F                <1> 	mov	al, 4Fh ; ax = 004Fh (successful)
  9590                              <1> ;vbe_srs_0:
  9591                              <1> 	; 13/01/2021
  9592 00003A98 59                  <1> 	pop	ecx
  9593 00003A99 5A                  <1> 	pop	edx
  9594 00003A9A 5F                  <1> 	pop	edi	
  9595                              <1> 
  9596 00003A9B C3                  <1> 	retn
  9597                              <1> 
  9598                              <1> 	; 23/01/2021
  9599                              <1> ;vbe_srs_10:
  9600                              <1> 	;; 14/01/2021
  9601                              <1> 	; return to 'sysvideo'
  9602                              <1> 	;mov	ebx, ecx ; transfer count
  9603                              <1> 	;	; (byte count for saving current video state)
  9604                              <1> 	;jmp	short vbe_srs_retn 
  9605                              <1> 
  9606                              <1> vbe_srs_4:
  9607                              <1> 	; 23/01/2021
  9608 00003A9C 80E10F              <1> 	and	cl, 0Fh ; 8, 4, 2, 1
  9609 00003A9F 7434                <1> 	jz	short vbe_srs_7 ; cx = 0 -> invalid !
  9610                              <1> 
  9611 00003AA1 BF00760900          <1> 	mov	edi, VBE3SAVERESTOREBLOCK
  9612                              <1> 
  9613 00003AA6 80FA01              <1> 	cmp	dl, 1
  9614 00003AA9 7730                <1> 	ja	short vbe_srs_8
  9615                              <1> 
  9616                              <1> 	; save video state
  9617                              <1> 
  9618 00003AAB F6C107              <1> 	test	cl, 07h ; 4, 2, 1
  9619 00003AAE 740A                <1> 	jz	short vbe_srs_5  ; vbe dispi regs state
  9620                              <1> 
  9621 00003AB0 E884000000          <1> 	call	biosfn_save_video_state
  9622                              <1> 	; edi = current position
  9623                              <1> 	;	in VBE3SAVERESTOREBLOCK
  9624                              <1> 	; 	(VGA save_state offset)
  9625                              <1> 	; modified regs: edi, eax, edx, ch
  9626 00003AB5 F6C108              <1> 	test	cl, 8
  9627 00003AB8 7405                <1> 	jz	short vbe_srs_6
  9628                              <1> vbe_srs_5:
  9629 00003ABA E8AB010000          <1> 	call	vbe_biosfn_save_video_state
  9630                              <1> 	; edi = end position
  9631                              <1> 	;	in VBE3SAVERESTOREBLOCK
  9632                              <1> 	; 	(VGA save_state offset)
  9633                              <1> 	; modified regs: edi, eax, edx, ch
  9634                              <1> vbe_srs_6:
  9635                              <1> 	; 23/01/2021
  9636 00003ABF 21DB                <1> 	and	ebx, ebx 
  9637 00003AC1 74D1                <1> 	jz	short vbe_srs_retn ; the caller is kernel
  9638                              <1> 	
  9639 00003AC3 BE00760900          <1> 	mov	esi, VBE3SAVERESTOREBLOCK
  9640 00003AC8 29F7                <1> 	sub	edi, esi
  9641 00003ACA 89F9                <1> 	mov	ecx, edi ; transfer count in bytes
  9642                              <1> 
  9643                              <1> 	;; 14/01/2021
  9644                              <1> 	;and	ebx, ebx 
  9645                              <1> 	;jz	short vbe_srs_10 ; the caller is kernel
  9646                              <1> 
  9647 00003ACC 89DF                <1> 	mov	edi, ebx ; user's buffer address
  9648 00003ACE E8D6D20000          <1> 	call	transfer_to_user_buffer
  9649 00003AD3 73BF                <1> 	jnc	short vbe_srs_retn
  9650                              <1> vbe_srs_7:
  9651                              <1> 	; // function failed
  9652                              <1> 	;mov	eax, 0100h
  9653 00003AD5 31C0                <1> 	xor	eax, eax
  9654 00003AD7 FEC4                <1> 	inc	ah  ; eax = 0100h
  9655                              <1> 	; 16/01/2021
  9656                              <1> 	; ax = 0014Fh
  9657                              <1> 	;retn
  9658                              <1> 	; 13/01/2021
  9659 00003AD9 EBBB                <1> 	jmp	short vbe_srs_0
  9660                              <1> vbe_srs_8:
  9661                              <1> 	;cmp	dl, 2
  9662                              <1> 	;jne	short vbe_srs_7
  9663                              <1> 	;		; invalid sub function
  9664                              <1> 
  9665                              <1> 	; 14/01/2021
  9666 00003ADB 09DB                <1> 	or	ebx, ebx ; user's buffer address
  9667                              <1> 	;jnz	short vbe_srs_11
  9668                              <1> 
  9669                              <1> 	; the caller is kernel ('sysvideo')
  9670                              <1> 	;jmp	short vbe_srs_12
  9671                              <1> 	; 23/01/2021
  9672 00003ADD 7414                <1> 	jz	short vbe_srs_12 ; 'sysvideo' call
  9673                              <1> vbe_srs_11:
  9674 00003ADF 89DE                <1> 	mov	esi, ebx ; user's buffer address
  9675                              <1> 	; 23/01/2021
  9676                              <1> 	;push	ebx
  9677                              <1> 	
  9678 00003AE1 E827000000          <1> 	call	vbe_srs_gbs
  9679                              <1> 	
  9680                              <1> 	; restore video state
  9681                              <1> 
  9682                              <1> 	;mov	edi, VBE3SAVERESTOREBLOCK
  9683 00003AE6 51                  <1> 	push	ecx
  9684 00003AE7 89D9                <1> 	mov	ecx, ebx ; transfer count in bytes
  9685 00003AE9 E805D30000          <1> 	call	transfer_from_user_buffer
  9686 00003AEE 59                  <1> 	pop	ecx
  9687                              <1> 	; 23/01/2021
  9688                              <1> 	;pop	ebx
  9689 00003AEF 89F3                <1> 	mov	ebx, esi
  9690 00003AF1 72E2                <1> 	jc	short vbe_srs_7
  9691                              <1> 
  9692                              <1> vbe_srs_12:
  9693                              <1> 	;mov	esi, VBE3SAVERESTOREBLOCK
  9694 00003AF3 89FE                <1> 	mov	esi, edi
  9695                              <1> 
  9696 00003AF5 F6C107              <1> 	test	cl, 07h ; 4, 2, 1
  9697 00003AF8 740C                <1> 	jz	short vbe_srs_9	; vbe dispi regs state
  9698                              <1> 
  9699 00003AFA E8A2010000          <1> 	call	biosfn_restore_video_state
  9700 00003AFF 72D4                <1> 	jc	short vbe_srs_7 ; invalid buffer content !
  9701                              <1> 	; esi = current position
  9702                              <1> 	;	in VBE3SAVERESTOREBLOCK
  9703                              <1> 	; 	(VGA save_state offset)
  9704                              <1> 	; modified regs: esi, eax, edx, ch
  9705 00003B01 F6C108              <1> 	test	cl, 8
  9706                              <1> 	;jz	short vbe_srs_10
  9707                              <1> 	; 23/01/2020
  9708 00003B04 EB8E                <1> 	jmp	short vbe_srs_retn
  9709                              <1> vbe_srs_9:
  9710 00003B06 E8F1020000          <1> 	call	vbe_biosfn_restore_video_state
  9711                              <1> 
  9712                              <1> 	; modified regs: esi, eax, edx, ch
  9713                              <1> 
  9714 00003B0B EB87                <1> 	jmp	short vbe_srs_retn
  9715                              <1> 
  9716                              <1> ;vbe_srs_10:
  9717                              <1> ;	; successful
  9718                              <1> ;	xor	eax, eax ; 0
  9719                              <1> ;	mov	al, 4Fh ; ax = 004Fh (successful)
  9720                              <1> ;	retn
  9721                              <1> 
  9722                              <1> vbe_srs_gbs:
  9723                              <1> 	; return buffer size according to flags
  9724 00003B0D 89CB                <1> 	mov	ebx, ecx ; options/flags
  9725 00003B0F D0E3                <1> 	shl	bl, 1
  9726 00003B11 668B9B[193B0000]    <1> 	mov	bx, [ebx+vbestatebufsize]
  9727 00003B18 C3                  <1> 	retn
  9728                              <1> 
  9729                              <1> vbestatebufsize:
  9730                              <1> 	; ----------------------------------------
  9731                              <1> 	; CL =	0  1   2    3    4    5    6    7
  9732                              <1> 	; ----------------------------------------
  9733 00003B19 0000460028006E0004- <1> 	dw	0, 70, 40, 110, 772, 842, 812, 882
  9733 00003B22 034A032C037203      <1>
  9734                              <1> 	; ----------------------------------------
  9735                              <1> 	; CL =	8   9   10  11   12   13   14   15
  9736                              <1> 	; ----------------------------------------
  9737 00003B29 120058003A00800016- <1> 	dw	18, 88, 58, 128, 790, 860, 830, 900
  9737 00003B32 035C033E038403      <1>
  9738                              <1> 
  9739                              <1> ; 11/01/2021
  9740                              <1> VGAREG_ACTL_ADDRESS	equ 3C0h
  9741                              <1> VGAREG_ACTL_WRITE_DATA	equ 3C0h
  9742                              <1> VGAREG_ACTL_READ_DATA	equ 3C1h
  9743                              <1> 
  9744                              <1> VGAREG_INPUT_STATUS	equ 3C2h
  9745                              <1> VGAREG_WRITE_MISC_OUTPUT equ 3C2h
  9746                              <1> VGAREG_VIDEO_ENABLE	equ 3C3h
  9747                              <1> VGAREG_SEQU_ADDRESS	equ 3C4h
  9748                              <1> VGAREG_SEQU_DATA	equ 3C5h
  9749                              <1> 
  9750                              <1> VGAREG_PEL_MASK		equ 3C6h
  9751                              <1> VGAREG_DAC_STATE	equ 3C7h
  9752                              <1> VGAREG_DAC_READ_ADDRESS	equ 3C7h
  9753                              <1> VGAREG_DAC_WRITE_ADDRESS equ 3C8h
  9754                              <1> VGAREG_DAC_DATA		equ 3C9h
  9755                              <1> 
  9756                              <1> VGAREG_READ_FEATURE_CTL	equ 3CAh
  9757                              <1> VGAREG_READ_MISC_OUTPUT	equ 3CCh
  9758                              <1> 
  9759                              <1> VGAREG_GRDC_ADDRESS	equ 3CEh
  9760                              <1> VGAREG_GRDC_DATA	equ 3CFh
  9761                              <1> 
  9762                              <1> ;VGAREG_MDA_CRTC_ADDRESS equ 3B4h
  9763                              <1> ;VGAREG_MDA_CRTC_DATA	equ 3B5h
  9764                              <1> VGAREG_VGA_CRTC_ADDRESS	equ 3D4h
  9765                              <1> VGAREG_VGA_CRTC_DATA	equ 3D5h
  9766                              <1> 
  9767                              <1> ;VGAREG_MDA_WRITE_FEATURE_CTL equ 3BAh
  9768                              <1> VGAREG_VGA_WRITE_FEATURE_CTL equ 3DAh
  9769                              <1> VGAREG_ACTL_RESET	equ 3DAh
  9770                              <1> 
  9771                              <1> ;VGAREG_MDA_MODECTL	equ 3B8h
  9772                              <1> VGAREG_CGA_MODECTL	equ 3D8h
  9773                              <1> VGAREG_CGA_PALETTE	equ 3D9h
  9774                              <1> 
  9775                              <1> biosfn_save_video_state:
  9776                              <1> 	; 03/08/2022 (TRDOS 386 v2.0.5)
  9777                              <1> 	; 22/01/2021
  9778                              <1> 	; 12/01/2021
  9779                              <1> 	; 11/01/2021 (TRDOS 386 v2.0.3)
  9780                              <1> 	; (vgabios.c)
  9781                              <1> 
  9782                              <1> 	; modified registers: eax, edx, edi, ch
  9783                              <1> 
  9784                              <1> 	;mov	edi, VBE3SAVERESTOREBLOCK
  9785                              <1> 
  9786                              <1> 	; input: edi = state buffer address
  9787                              <1> 
  9788 00003B39 F6C101              <1> 	test	cl, 1
  9789 00003B3C 0F8485000000        <1> 	jz	bfn_svs_4
  9790                              <1> 
  9791 00003B42 66BAC403            <1> 	mov	dx, VGAREG_SEQU_ADDRESS ; 3C7h
  9792 00003B46 EC                  <1> 	in	al, dx
  9793 00003B47 AA                  <1> 	stosb
  9794                              <1> 	;mov	dx, VGAREG_VGA_CRTC_ADDRESS ; 3D4h
  9795 00003B48 B2D4                <1> 	mov	dl, 0D4h
  9796 00003B4A EC                  <1> 	in	al, dx
  9797 00003B4B AA                  <1> 	stosb
  9798                              <1>   	;mov	dx, VGAREG_GRDC_ADDRESS ; 3CEh 
  9799 00003B4C B2CE                <1>         mov	dl, 0CEh
  9800 00003B4E EC                  <1> 	in	al, dx
  9801 00003B4F AA                  <1> 	stosb
  9802                              <1> 	;mov	dx, VGAREG_ACTL_RESET ; 3DAh
  9803 00003B50 B2DA                <1> 	mov	dl, 0DAh
  9804 00003B52 EC                  <1> 	in	al, dx
  9805                              <1> 	;mov	dx, VGAREG_ACTL_ADDRESS ; 3C0h
  9806 00003B53 B2C0                <1> 	mov	dl, 0C0h
  9807 00003B55 EC                  <1> 	in	al, dx
  9808 00003B56 AA                  <1> 	stosb
  9809 00003B57 88C4                <1> 	mov	ah, al ; ar_index
  9810                              <1> 	;mov	dx, VGAREG_READ_FEATURE_CTL ; 3CAh
  9811 00003B59 B2CA                <1> 	mov	dl, 0CAh
  9812 00003B5B EC                  <1> 	in	al, dx
  9813 00003B5C AA                  <1> 	stosb
  9814                              <1> 	; (5 bytes are writen above)
  9815                              <1> 
  9816                              <1> 	; for(i=1;i<=4;i++){
  9817 00003B5D B001                <1> 	mov	al, 1
  9818                              <1> 	;;mov	dx, VGAREG_SEQU_ADDRESS ; 3C4h
  9819                              <1> 	;mov	dl, 0C4h
  9820 00003B5F B504                <1> 	mov	ch, 4
  9821                              <1> bfn_svs_0:
  9822                              <1> 	; outb(VGAREG_SEQU_ADDRESS, i);
  9823                              <1> 	;mov	dx, VGAREG_SEQU_ADDRESS ; 3C4h
  9824 00003B61 B2C4                <1> 	mov	dl, 0C4h
  9825 00003B63 EE                  <1> 	out	dx, al
  9826                              <1> 	;mov	dx, VGAREG_SEQU_DATA  ; 3C5h
  9827 00003B64 FEC2                <1> 	inc	dl  ; dx = 3C5h
  9828                              <1> 	; inb(VGAREG_SEQU_DATA)
  9829 00003B66 50                  <1> 	push	eax
  9830 00003B67 EC                  <1> 	in	al, dx
  9831 00003B68 AA                  <1> 	stosb	; (4 bytes in loop)
  9832 00003B69 58                  <1> 	pop	eax
  9833                              <1> 	;mov	dx, VGAREG_SEQU_ADDRESS ; 3C4h
  9834                              <1> 	;dec	dl	
  9835 00003B6A FEC0                <1> 	inc	al  ; i++
  9836 00003B6C FECD                <1> 	dec	ch
  9837 00003B6E 75F1                <1> 	jnz	short bfn_svs_0
  9838                              <1> 
  9839                              <1> 	; outb(VGAREG_SEQU_ADDRESS, 0);
  9840 00003B70 28C0                <1> 	sub	al, al ; 0
  9841 00003B72 EE                  <1> 	out	dx, al
  9842                              <1> 	; inb(VGAREG_SEQU_DATA)
  9843                              <1> 	;mov	dx, VGAREG_SEQU_DATA ; 3C5h
  9844 00003B73 FEC2                <1> 	inc	dl  ; dx = 3C5h
  9845 00003B75 EC                  <1> 	in	al, dx
  9846 00003B76 AA                  <1> 	stosb	; (+1 byte)
  9847                              <1> 
  9848                              <1>         ; for(i=0;i<=0x18;i++) {
  9849 00003B77 28C0                <1> 	sub	al, al ; 0
  9850                              <1> 	;;mov	dx, VGAREG_VGA_CRTC_ADDRESS ; 3D4h
  9851                              <1> 	;mov	dl, 0D4h
  9852 00003B79 B519                <1> 	mov	ch, 25
  9853                              <1> bfn_svs_1:
  9854                              <1>         ; outb(crtc_addr,i);
  9855                              <1> 	;mov	dx, VGAREG_VGA_CRTC_ADDRESS ; 3D4h
  9856 00003B7B B2D4                <1> 	mov	dl, 0D4h
  9857 00003B7D EE                  <1> 	out	dx, al
  9858                              <1> 	;mov	dx, VGAREG_VGA_CRTC_DATA ; 3D5h
  9859 00003B7E FEC2                <1> 	inc	dl  ; dx = 3D5h
  9860                              <1> 	; inb(crtc_addr+1)
  9861 00003B80 50                  <1> 	push	eax
  9862 00003B81 EC                  <1> 	in	al, dx
  9863 00003B82 AA                  <1> 	stosb	; (25 bytes in loop)
  9864 00003B83 58                  <1> 	pop	eax
  9865                              <1> 	;mov	dx, VGAREG_VGA_CRTC_ADDRESS ; 3D4h
  9866                              <1> 	;dec	dl	
  9867 00003B84 FEC0                <1> 	inc	al  ; i++
  9868 00003B86 FECD                <1> 	dec	ch
  9869 00003B88 75F1                <1> 	jnz	short bfn_svs_1
  9870                              <1> 
  9871 00003B8A 80E420              <1> 	and	ah, 20h  ; (ar_index & 0x20)
  9872                              <1>         ; for(i=0;i<=0x13;i++) {
  9873 00003B8D 28C0                <1> 	sub	al, al ; 0
  9874 00003B8F B514                <1> 	mov	ch, 20
  9875                              <1> bfn_svs_2:
  9876                              <1> 	; inb(VGAREG_ACTL_RESET);
  9877                              <1> 	;mov	dx, VGAREG_ACTL_RESET ; 3DAh
  9878 00003B91 B2DA                <1> 	mov	dl, 0DAh
  9879 00003B93 50                  <1> 	push	eax
  9880 00003B94 EC                  <1> 	in	al, dx
  9881 00003B95 8A0424              <1> 	mov	al, [esp]
  9882                              <1>  	; outb(VGAREG_ACTL_ADDRESS, i | (ar_index & 0x20));
  9883 00003B98 08E0                <1> 	or	al, ah
  9884                              <1> 	;mov	dx, VGAREG_ACTL_ADDRESS ; 3C0h
  9885 00003B9A B2C0                <1> 	mov	dl, 0C0h
  9886 00003B9C EE                  <1> 	out	dx, al
  9887                              <1> 	;mov	dx, VGAREG_ACTL_READ_DATA ; 3C1h
  9888                              <1> 	;mov	dl, 0C1h
  9889 00003B9D FEC2                <1> 	inc	dl
  9890 00003B9F EC                  <1> 	in	al, dx
  9891 00003BA0 AA                  <1> 	stosb	; (20 bytes in loop)
  9892 00003BA1 58                  <1> 	pop	eax
  9893 00003BA2 FEC0                <1> 	inc	al  ; i++
  9894 00003BA4 FECD                <1> 	dec	ch
  9895 00003BA6 75E9                <1> 	jnz	short bfn_svs_2
  9896                              <1> 
  9897                              <1> 	; inb(VGAREG_ACTL_RESET);
  9898                              <1> 	;mov	dx, VGAREG_ACTL_RESET ; 3DAh
  9899 00003BA8 B2DA                <1> 	mov	dl, 0DAh
  9900 00003BAA EC                  <1> 	in	al, dx
  9901                              <1> 
  9902                              <1>         ; for(i=0;i<=8;i++) {
  9903 00003BAB 28C0                <1> 	sub	al, al ; 0
  9904                              <1> 	;;mov	dx, VGAREG_GRDC_ADDRESS ; 3CEh
  9905                              <1> 	;mov	dl, 0CEh
  9906 00003BAD B509                <1> 	mov	ch, 9
  9907                              <1> bfn_svs_3:
  9908                              <1> 	; outb(VGAREG_GRDC_ADDRESS,i)
  9909                              <1> 	;mov	dx, VGAREG_GRDC_ADDRESS ; 3CEh
  9910 00003BAF B2CE                <1> 	mov	dl, 0CEh
  9911 00003BB1 EE                  <1> 	out	dx, al
  9912                              <1> 	; inb(VGAREG_ACTL_READ_DATA)
  9913 00003BB2 50                  <1> 	push	eax
  9914                              <1> 	;mov	dx, VGAREG_GRDC_DATA ; 3CFh
  9915                              <1> 	;mov	dl, 0CFh
  9916 00003BB3 FEC2                <1> 	inc	dl
  9917 00003BB5 EC                  <1> 	in	al, dx
  9918 00003BB6 AA                  <1> 	stosb	; (9 bytes in loop)
  9919 00003BB7 58                  <1> 	pop	eax
  9920                              <1> 	;dec	dl
  9921 00003BB8 FEC0                <1> 	inc	al  ; i++
  9922 00003BBA FECD                <1> 	dec	ch
  9923 00003BBC 75F1                <1> 	jnz	short bfn_svs_3
  9924                              <1> 
  9925                              <1> 	; write_word(ES, BX, crtc_addr); BX+= 2;
  9926                              <1> 	; (offset 64)
  9927 00003BBE 66B8D403            <1> 	mov	ax, 3D4h ; VGAREG_VGA_CRTC_ADDRESS
  9928 00003BC2 66AB                <1> 	stosw	; (2 bytes (1 word))
  9929                              <1> 
  9930                              <1>         ; /* XXX: read plane latches */
  9931 00003BC4 31C0                <1> 	xor	eax, eax  ; 0
  9932 00003BC6 AB                  <1>        	stosd	; (4 bytes)
  9933                              <1> 
  9934                              <1> 	; (total 70 bytes are written above as controller hardware state)
  9935                              <1> 
  9936                              <1> bfn_svs_4:		
  9937                              <1> 	; 12/01/2021 (TRDOS 386 v2.0.3)
  9938 00003BC7 F6C102              <1> 	test	cl, 2
  9939 00003BCA 7476                <1> 	jz	short bfn_svs_6
  9940                              <1> 
  9941                              <1> 	; VIDEO BIOS DATA
  9942                              <1> 	; !!! this data is valid for TRDOS 386 v2 kernel only !!!
  9943                              <1> 	; (this is not same with BOCHS/PLEX86 video bios, BIOS data)  
  9944                              <1>   
  9945                              <1>     	; if (CX & 2) {
  9946                              <1>         ;write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE)); BX++;
  9947                              <1>         ;write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS)); BX += 2;
  9948                              <1>         ;write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE)); BX += 2;
  9949                              <1>         ;write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS)); BX += 2;
  9950                              <1>         ;write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)); BX++;
  9951                              <1>         ;write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT)); BX += 2;
  9952                              <1>         ;write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL)); BX++;
  9953                              <1>         ;write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES)); BX++;
  9954                              <1>         ;write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL)); BX++;
  9955                              <1>         ;write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CURSOR_TYPE)); BX += 2;
  9956                              <1>         ;for(i=0;i<8;i++) {
  9957                              <1>         ;   write_word(ES, BX, read_word(BIOSMEM_SEG, BIOSMEM_CURSOR_POS+2*i));
  9958                              <1>         ;   BX += 2;
  9959                              <1>         ;}
  9960                              <1>         ;write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CURRENT_START)); BX += 2;
  9961                              <1>         ;write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE)); BX++;
  9962                              <1>         ;/* current font */
  9963                              <1>         ;write_word(ES, BX, read_word(0, 0x1f * 4)); BX += 2;
  9964                              <1>         ;write_word(ES, BX, read_word(0, 0x1f * 4 + 2)); BX += 2;
  9965                              <1>         ;write_word(ES, BX, read_word(0, 0x43 * 4)); BX += 2;
  9966                              <1>         ;write_word(ES, BX, read_word(0, 0x43 * 4 + 2)); BX += 2;
  9967                              <1> 
  9968                              <1> 	; !!! save TRDOS 386 v2 kernel spesific video bios data !!!
  9969                              <1> 	; (which is/are used by 'SET_MODE' function and/or it's sub functions)
  9970                              <1> 
  9971 00003BCC 66B8D403            <1> 	mov	ax, 3D4h ; CRTC_ADDR, always 3D4h (color VGA) for TRDOS 386 v2
  9972 00003BD0 66AB                <1> 	stosw
  9973 00003BD2 A0[1E670000]        <1> 	mov	al, [CRT_MODE] ; Current video mode (0FFh for VESA VBE modes) 
  9974 00003BD7 AA                  <1> 	stosb
  9975 00003BD8 A0[1F670000]        <1> 	mov	al, [CRT_MODE_SET] ; 29h for mode 03h ; TRDOS 386 feature only !
  9976 00003BDD AA                  <1> 	stosb	
  9977 00003BDE 66A1[D20F0300]      <1>  	mov	ax, [video_mode] ; Current VESA VBE (SVGA, extended VGA) mode 
  9978 00003BE4 66AB                <1> 	stosw			 ; (valid if [CRT_MODE] = 0FFh)	
  9979 00003BE6 66A1[DC830100]      <1> 	mov	ax, [CRT_LEN] ; page size (in bytes)
  9980 00003BEC 66AB                <1> 	stosw
  9981 00003BEE 66A1[64770100]      <1> 	mov	ax, [CRT_START] ; video page start offset
  9982 00003BF4 66AB                <1>  	stosw
  9983 00003BF6 A0[20670000]        <1> 	mov	al, [CRT_COLS] ; nbcols, characters per row	
  9984 00003BFB AA                  <1> 	stosb
  9985 00003BFC A0[26670000]        <1> 	mov	al, [VGA_ROWS] ; nbrows, (character) rows per page (not rows-1)
  9986 00003C01 AA                  <1> 	stosb
  9987 00003C02 A0[22670000]        <1> 	mov	al, [CHAR_HEIGHT] ; character font height (8 or 16 or 14)
  9988 00003C07 AA                  <1> 	stosb
  9989 00003C08 A0[23670000]        <1> 	mov	al, [VGA_VIDEO_CTL] ; ROM BIOS DATA AREA Offset 87h
  9990 00003C0D AA                  <1> 	stosb
  9991 00003C0E A0[24670000]        <1> 	mov	al, [VGA_SWITCHES] ; feature bit switches
  9992 00003C13 AA                  <1> 	stosb
  9993 00003C14 A0[25670000]        <1> 	mov	al, [VGA_MODESET_CTL] ; basic mode set options
  9994 00003C19 AA                  <1> 	stosb
  9995                              <1> 	; followings are only used by TRDOS 386 v2 (IBM PC/AT ROMBIOS) code 
  9996                              <1> 	; (bochs/plex86 does not use and return those)
  9997 00003C1A A0[21670000]        <1> 	mov	al, [CRT_PALETTE] ; current color palette ; TRDOS 386 feature only !
  9998 00003C1F AA                  <1> 	stosb
  9999 00003C20 A0[76770100]        <1> 	mov	al, [ACTIVE_PAGE] ; current video page 
 10000 00003C25 AA                  <1> 	stosb
 10001 00003C26 66A1[37670000]      <1> 	mov	ax, [CURSOR_MODE] ; cursor type
 10002 00003C2C 66AB                <1> 	stosw
 10003                              <1> 	;mov	eax, [CURSOR_POSN] ; cursor position for video page 0 and 1 
 10004                              <1> 	;stosd
 10005                              <1> 	;mov	eax, [CURSOR_POSN+4] ; cursor position for video page 2 and 3 
 10006                              <1> 	;stosd
 10007                              <1> 	;mov	eax, [CURSOR_POSN+8] ; cursor position for video page 4 and 5 
 10008                              <1> 	;stosd
 10009                              <1> 	;mov	eax, [CURSOR_POSN+12] ; cursor position for video page 6 and 7 
 10010                              <1> 	;stosd
 10011 00003C2E 56                  <1> 	push	esi
 10012 00003C2F B504                <1> 	mov	ch, 4
 10013 00003C31 BE[66770100]        <1> 	mov	esi, CURSOR_POSN
 10014                              <1> bfn_svs_5:
 10015 00003C36 A5                  <1> 	movsd
 10016 00003C37 FECD                <1> 	dec	ch
 10017 00003C39 75FB                <1> 	jnz	short bfn_svs_5
 10018 00003C3B 5E                  <1> 	pop	esi
 10019                              <1> 	; (font addr) protected mode address in kernel's/system memory space 
 10020                              <1> 	; (not accessable/meaningful address value by user)
 10021 00003C3C A1[EE830100]        <1> 	mov	eax, [VGA_INT43H] ; VGA current (default) font address
 10022 00003C41 AB                  <1> 	stosd
 10023                              <1> 	
 10024                              <1> 	; (total 40 bytes are written above as BIOS data state)
 10025                              <1> 
 10026                              <1> bfn_svs_6:
 10027                              <1> 	; 12/01/2021
 10028 00003C42 F6C104              <1> 	test	cl, 4
 10029 00003C45 7422                <1> 	jz	short bfn_svs_8
 10030                              <1> 
 10031                              <1>   	;/* XXX: check this */
 10032                              <1> 		; /* read/write mode dac */
 10033                              <1>         ;write_byte(ES, BX, inb(VGAREG_DAC_STATE)); BX++;
 10034                              <1> 	;	; /* pix address */
 10035                              <1>         ;write_byte(ES, BX, inb(VGAREG_DAC_WRITE_ADDRESS)); BX++;
 10036                              <1>         ;write_byte(ES, BX, inb(VGAREG_PEL_MASK)); BX++;
 10037                              <1>         ;// Set the whole dac always, from 0
 10038                              <1>         ;outb(VGAREG_DAC_WRITE_ADDRESS,0x00);
 10039                              <1>         ;for(i=0;i<256*3;i++) {
 10040                              <1>         ;   write_byte(ES, BX, inb(VGAREG_DAC_DATA)); BX++;
 10041                              <1>         ;}
 10042                              <1>         ;write_byte(ES, BX, 0); BX++; /* color select register */
 10043                              <1> 
 10044                              <1> 	; /* read/write mode dac */
 10045 00003C47 66BAC703            <1>     	mov	dx, 3C7h ; VGAREG_DAC_STATE
 10046 00003C4B EC                  <1> 	in	al, dx
 10047 00003C4C AA                  <1> 	stosb
 10048                              <1> 	; /* pix address */
 10049                              <1>     	;mov	dx, VGAREG_DAC_WRITE_ADDRESS ; 3C8h
 10050                              <1> 	;mov	dl, 0C8h
 10051 00003C4D FEC2                <1> 	inc	dl
 10052 00003C4F EC                  <1> 	in	al, dx
 10053 00003C50 AA                  <1> 	stosb
 10054                              <1>     	;mov	dx, VGAREG_PEL_MASK  ; 3C6h
 10055 00003C51 B2C6                <1> 	mov	dl, 0C6h
 10056 00003C53 EC                  <1> 	in	al, dx
 10057 00003C54 AA                  <1> 	stosb
 10058                              <1> 	;// Set the whole dac always, from 0
 10059 00003C55 30C0                <1> 	xor	al, al ; 0
 10060                              <1> 	;mov	dx, VGAREG_DAC_WRITE_ADDRESS ; 3C8h
 10061 00003C57 B2C8                <1> 	mov	dl, 0C8h
 10062 00003C59 EE                  <1> 	out	dx, al
 10063                              <1> 
 10064 00003C5A 51                  <1> 	push	ecx ; 22/01/2021
 10065                              <1> 	;for(i=0;i<256*3;i++) {
 10066                              <1> 	;mov	ecx, 256*3 ; 768 bytes
 10067                              <1> 	; 03/08/2022
 10068 00003C5B 29C9                <1> 	sub	ecx, ecx
 10069 00003C5D B503                <1> 	mov	ch, 3
 10070                              <1> 	; ecx = 300h = 768
 10071                              <1> 	;mov	dx, VGAREG_DAC_DATA ; 3C9h
 10072                              <1> 	;mov	dl, 0C9h
 10073 00003C5F FEC2                <1> 	inc	dl ; dx = 3C9h
 10074                              <1> bfn_svs_7:
 10075 00003C61 EC                  <1> 	in	al, dx
 10076 00003C62 AA                  <1> 	stosb
 10077 00003C63 E2FC                <1> 	loop	bfn_svs_7
 10078 00003C65 59                  <1> 	pop	ecx ; 22/01/2021
 10079                              <1> 
 10080                              <1> 	; /* color select register */
 10081 00003C66 28C0                <1> 	sub	al, al ; 0
 10082 00003C68 AA                  <1> 	stosb
 10083                              <1> 
 10084                              <1> 	; (total 772 bytes are written above as DAC state)
 10085                              <1> bfn_svs_8:
 10086 00003C69 C3                  <1> 	retn
 10087                              <1> 
 10088                              <1> vbe_biosfn_save_video_state:
 10089                              <1> 	; 23/01/2021
 10090                              <1> 	; 13/01/2021
 10091                              <1> 	; 12/01/2021 (TRDOS 386 v2.0.3)
 10092                              <1> 	; (vbe.c)
 10093                              <1> 
 10094                              <1> 	; modified registers: eax, edx, edi, ch
 10095                              <1> 	
 10096                              <1> 	; input: edi = state buffer address
 10097                              <1> 	; output: 
 10098                              <1> 	;	 VBE DISPI register contents will be saved
 10099                              <1> 	;	 (18 bytes, 9 words)
 10100                              <1> 
 10101                              <1> 	; outw(VBE_DISPI_IOPORT_INDEX,VBE_DISPI_INDEX_ENABLE);
 10102                              <1> 	; enable = inw(VBE_DISPI_IOPORT_DATA);
 10103                              <1>   	; write_word(ES, BX, enable);
 10104                              <1>  	; BX += 2;
 10105                              <1> 	; if (!(enable & VBE_DISPI_ENABLED)) 
 10106                              <1> 	;	return;
 10107                              <1> 	; for(i = VBE_DISPI_INDEX_XRES;
 10108                              <1> 	;		 i <= VBE_DISPI_INDEX_Y_OFFSET; i++) {
 10109                              <1> 	;    if (i != VBE_DISPI_INDEX_ENABLE) {
 10110                              <1> 	;        outw(VBE_DISPI_IOPORT_INDEX, i);
 10111                              <1> 	;        write_word(ES, BX, inw(VBE_DISPI_IOPORT_DATA));
 10112                              <1>         ;    BX += 2;
 10113                              <1> 	;        }
 10114                              <1> 	; }
 10115                              <1> 
 10116 00003C6A 66BACE01            <1> 	mov	dx, 01CEh ; VBE_DISPI_IOPORT_INDEX
 10117                              <1> 	;mov	eax, 04h  ; VBE_DISPI_INDEX_ENABLE
 10118                              <1> 	 ;03/08/2022
 10119 00003C6E 66EF                <1> 	out	dx, ax
 10120                              <1> 	;mov	dx, 01CFh ; VBE_DISPI_IOPORT_DATA	
 10121 00003C70 FEC2                <1> 	inc	dl
 10122 00003C72 66ED                <1> 	in	ax, dx ; enable (status)
 10123 00003C74 66AB                <1> 	stosw 
 10124 00003C76 6683E001            <1> 	and	ax, 1 ; VBE_DISPI_ENABLED
 10125 00003C7A 7505                <1> 	jnz	short vbe_bfn_svs_0
 10126                              <1> 	; 23/01/2021
 10127                              <1> 	; ax = 0
 10128                              <1> 	; VBE_DISPI_DISABLED
 10129                              <1> 	; 13/01/2021
 10130                              <1> 	; clear remain 8 bytes 
 10131                              <1> 	;xor	eax, eax
 10132 00003C7C AB                  <1> 	stosd	; 2
 10133 00003C7D AB                  <1> 	stosd	; 2
 10134 00003C7E AB                  <1> 	stosd	; 2
 10135 00003C7F AB                  <1> 	stosd	; 2
 10136 00003C80 C3                  <1> 	retn
 10137                              <1> vbe_bfn_svs_0:
 10138                              <1> 	; VBE_DISPI_ENABLED
 10139                              <1> 
 10140                              <1> 	;sub	eax, eax
 10141 00003C81 28C0                <1> 	sub	al, al ; eax = 0
 10142                              <1> 	
 10143                              <1> 	; from VBE_DISPI_INDEX_XRES
 10144                              <1> 	;   to VBE_DISPI_INDEX_BPP	
 10145                              <1> 
 10146 00003C83 B503                <1>  	mov	ch, 3
 10147                              <1> 	; al = 0 ; VBE_DISPI_INDEX_XRES - 1
 10148                              <1> 
 10149 00003C85 E804000000          <1> 	call	vbe_bfn_svs_1
 10150                              <1> 
 10151                              <1> 	; from VBE_DISPI_INDEX_BANK
 10152                              <1> 	;   to VBE_DISPI_INDEX_Y_OFFSET
 10153                              <1> 
 10154 00003C8A FEC0                <1> 	inc	al 
 10155                              <1> 	; al = 4 ; VBE_DISPI_INDEX_BANK - 1
 10156                              <1> 
 10157 00003C8C B505                <1> 	mov	ch, 5
 10158                              <1> vbe_bfn_svs_1:
 10159 00003C8E FEC0                <1> 	inc	al ; from VBE_DISPI_INDEX_XRES
 10160                              <1> 		   ;   to VBE_DISPI_INDEX_BPP	
 10161                              <1> 	;mov	dx, 01CEh ; VBE_DISPI_IOPORT_INDEX
 10162 00003C90 FECA                <1> 	dec	dl ; 1CEh
 10163 00003C92 66EF                <1> 	out	dx, ax
 10164 00003C94 50                  <1> 	push	eax
 10165                              <1> 	;mov	dx, 01CFh ; VBE_DISPI_IOPORT_DATA
 10166 00003C95 FEC2                <1> 	inc	dl ; 1CFh
 10167 00003C97 66ED                <1> 	in	ax, dx
 10168 00003C99 66AB                <1> 	stosw
 10169 00003C9B 58                  <1> 	pop	eax
 10170 00003C9C FECD                <1> 	dec	ch
 10171 00003C9E 75EE                <1> 	jnz	short vbe_bfn_svs_1		
 10172 00003CA0 C3                  <1> 	retn
 10173                              <1> 
 10174                              <1> biosfn_restore_video_state:
 10175                              <1> 	; 22/01/2021
 10176                              <1> 	; 13/01/2021
 10177                              <1> 	; 12/01/2021 (TRDOS 386 v2.0.3)
 10178                              <1> 	; (vgabios.c)
 10179                              <1> 
 10180                              <1> 	; modified registers: eax, edx, esi, edi, ch
 10181                              <1> 
 10182                              <1> 	;mov	esi, VBE3SAVERESTOREBLOCK
 10183                              <1> 
 10184                              <1> 	; input: esi = state buffer address
 10185                              <1> 
 10186 00003CA1 F6C101              <1> 	test	cl, 1
 10187 00003CA4 0F84A9000000        <1> 	jz	bfn_rvs_6
 10188                              <1> 
 10189 00003CAA 66817E40D403        <1> 	cmp	word [esi+64], 3D4h ; must be 3D4h
 10190 00003CB0 7402                <1> 	je	short bfn_rvs_0  
 10191                              <1> 			; it is seen as valid buffer
 10192 00003CB2 F9                  <1> 	stc
 10193 00003CB3 C3                  <1> 	retn
 10194                              <1> 
 10195                              <1> bfn_rvs_0:
 10196 00003CB4 89F7                <1> 	mov	edi, esi ; addr1
 10197 00003CB6 83C605              <1> 	add	esi, 5 ; skip 1st 5 bytes for now
 10198                              <1> 
 10199                              <1> 	; // Reset Attribute Ctl flip-flop
 10200                              <1>         ; inb(VGAREG_ACTL_RESET);
 10201 00003CB9 66BADA03            <1> 	mov	dx, 3DAh ; VGAREG_ACTL_RESET
 10202 00003CBD EC                  <1> 	in	al, dx
 10203                              <1> 
 10204                              <1> 	; for(i=1;i<=4;i++){
 10205 00003CBE B001                <1> 	mov	al, 1
 10206                              <1> 	;;mov	dx, VGAREG_SEQU_ADDRESS ; 3C4h
 10207                              <1> 	;mov	dl, 0C4h
 10208 00003CC0 B504                <1> 	mov	ch, 4
 10209                              <1> bfn_rvs_1:
 10210                              <1> 	; outb(VGAREG_SEQU_ADDRESS, i);
 10211                              <1> 	;mov	dx, VGAREG_SEQU_ADDRESS ; 3C4h
 10212 00003CC2 B2C4                <1> 	mov	dl, 0C4h
 10213 00003CC4 EE                  <1> 	out	dx, al
 10214                              <1> 	;mov	dx, VGAREG_SEQU_DATA  ; 3C5h
 10215 00003CC5 FEC2                <1> 	inc	dl  ; dx = 3C5h
 10216                              <1> 	; outb(VGAREG_SEQU_DATA)
 10217 00003CC7 50                  <1> 	push	eax
 10218 00003CC8 AC                  <1> 	lodsb	; (4 bytes in loop)
 10219 00003CC9 EE                  <1> 	out	dx, al
 10220 00003CCA 58                  <1> 	pop	eax
 10221                              <1> 	;mov	dx, VGAREG_SEQU_ADDRESS ; 3C4h
 10222                              <1> 	;dec	dl	
 10223 00003CCB FEC0                <1> 	inc	al  ; i++
 10224 00003CCD FECD                <1> 	dec	ch
 10225 00003CCF 75F1                <1> 	jnz	short bfn_rvs_1
 10226                              <1> 
 10227                              <1> 	; outb(VGAREG_SEQU_ADDRESS, 0);
 10228 00003CD1 28C0                <1> 	sub	al, al ; 0
 10229 00003CD3 EE                  <1> 	out	dx, al
 10230                              <1> 	; outb(VGAREG_SEQU_DATA)
 10231                              <1> 	;mov	dx, VGAREG_SEQU_DATA ; 3C5h
 10232 00003CD4 FEC2                <1> 	inc	dl  ; dx = 3C5h
 10233 00003CD6 AC                  <1> 	lodsb	; (+1 byte)
 10234 00003CD7 EE                  <1> 	out	dx, al
 10235                              <1> 
 10236                              <1> 	; // Disable CRTC write protection
 10237                              <1> 	; outw(crtc_addr,0x0011);
 10238                              <1> 	;mov	dx, VGAREG_VGA_CRTC_ADDRESS ; 3D4h
 10239 00003CD8 B2D4                <1> 	mov	dl, 0D4h
 10240 00003CDA 66B81100            <1> 	mov	ax, 11h
 10241 00003CDE 66EF                <1> 	out	dx, ax
 10242                              <1> 
 10243                              <1> 	; // Set CRTC regs
 10244                              <1>        
 10245                              <1> 	; for(i=0;i<=0x18;i++) {
 10246                              <1>         ;   if (i != 0x11) {
 10247 00003CE0 28C0                <1> 	sub	al, al ; 0
 10248                              <1> 	;;mov	dx, VGAREG_VGA_CRTC_ADDRESS ; 3D4h
 10249                              <1> 	;mov	dl, 0D4h
 10250 00003CE2 B519                <1> 	mov	ch, 25
 10251                              <1> bfn_rvs_2:
 10252                              <1>         ; outb(crtc_addr,i);
 10253                              <1> 	;mov	dx, VGAREG_VGA_CRTC_ADDRESS ; 3D4h
 10254 00003CE4 B2D4                <1> 	mov	dl, 0D4h
 10255 00003CE6 EE                  <1> 	out	dx, al
 10256                              <1> 	;mov	dx, VGAREG_VGA_CRTC_DATA ; 3D5h
 10257 00003CE7 FEC2                <1> 	inc	dl  ; dx = 3D5h
 10258                              <1> 	; inb(crtc_addr+1)
 10259 00003CE9 50                  <1> 	push	eax
 10260 00003CEA AC                  <1> 	lodsb	; (25 bytes in loop)
 10261 00003CEB EE                  <1> 	out	dx, al
 10262 00003CEC 58                  <1> 	pop	eax
 10263                              <1> 	;mov	dx, VGAREG_VGA_CRTC_ADDRESS ; 3D4h
 10264                              <1> 	;dec	dl
 10265 00003CED FEC0                <1> 	inc	al  ; i++
 10266 00003CEF 3C11                <1> 	cmp	al, 17 ; 11h
 10267 00003CF1 7505                <1> 	jne	short bfn_rvs_3
 10268 00003CF3 AC                  <1> 	lodsb
 10269 00003CF4 88C4                <1> 	mov	ah, al ; *
 10270 00003CF6 B012                <1> 	mov	al, 18 
 10271                              <1> bfn_rvs_3:
 10272 00003CF8 FECD                <1> 	dec	ch
 10273 00003CFA 75E8                <1> 	jnz	short bfn_rvs_2
 10274                              <1> 
 10275                              <1> 	; // select crtc base address
 10276                              <1>         ; v = inb(VGAREG_READ_MISC_OUTPUT) & ~0x01;
 10277                              <1> 	;if (crtc_addr = 0x3d4)
 10278                              <1> 	;   v |= 0x01;
 10279                              <1> 	; outb(VGAREG_WRITE_MISC_OUTPUT, v);
 10280                              <1> 
 10281                              <1> 	;;mov	dx, VGAREG_READ_MISC_OUTPUT ; 3CCh
 10282                              <1> 	;mov	dl, 0CCh
 10283                              <1> 	;in	al, dl
 10284                              <1> 	;and	al, 1
 10285                              <1> 	;;mov	dx, VGAREG_WRITE_MISC_OUTPUT ; 3C2h
 10286                              <1> 	;mov	dl, 0C2h
 10287                              <1> 	;or	al, 1
 10288                              <1> 	;out	dx, al
 10289                              <1> 
 10290                              <1> 	; // enable write protection if needed
 10291                              <1> 	;outb(crtc_addr, 0x11);
 10292                              <1>         ;outb(crtc_addr+1, read_byte(ES, BX - 0x18 + 0x11));
 10293                              <1> 	;mov	dx, VGAREG_VGA_CRTC_ADDRESS ; 3D4h
 10294 00003CFC B2D4                <1> 	mov	dl, 0D4h
 10295 00003CFE B011                <1> 	mov	al, 11h
 10296 00003D00 EE                  <1> 	out	dx, al
 10297 00003D01 88E0                <1> 	mov	al, ah ; *
 10298 00003D03 FEC2                <1> 	inc	dl ; dx = 3D5h
 10299 00003D05 EE                  <1> 	out	dx, al
 10300                              <1> 
 10301                              <1> 	; // Set Attribute Ctl
 10302 00003D06 8A6703              <1> 	mov	ah, [edi+3] ; addr1+3, ah = ar_index
 10303 00003D09 80E420              <1> 	and	ah, 20h  ; (ar_index & 0x20)
 10304                              <1> 
 10305                              <1>         ; inb(VGAREG_ACTL_RESET);
 10306                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
 10307 00003D0C B2DA                <1> 	mov	dl, 0DAh
 10308 00003D0E EC                  <1> 	in	al, dx
 10309                              <1> 
 10310                              <1>         ; for(i=0;i<=0x13;i++) {
 10311 00003D0F 28C0                <1> 	sub	al, al ; 0
 10312 00003D11 B514                <1> 	mov	ch, 20
 10313                              <1> bfn_rvs_4:
 10314                              <1>  	; outb(VGAREG_ACTL_ADDRESS, i | (ar_index & 0x20));
 10315 00003D13 50                  <1> 	push	eax
 10316 00003D14 08E0                <1> 	or	al, ah
 10317                              <1> 	;mov	dx, VGAREG_ACTL_ADDRESS ; 3C0h
 10318 00003D16 B2C0                <1> 	mov	dl, 0C0h
 10319 00003D18 EE                  <1> 	out	dx, al
 10320                              <1> 	;mov	dx, VGAREG_ACTL_WRITE_DATA ; 3C0h
 10321                              <1> 	;mov	dl, 0C0h
 10322 00003D19 AC                  <1> 	lodsb	; (20 bytes in loop)
 10323 00003D1A EE                  <1> 	out	dx, al
 10324 00003D1B 58                  <1> 	pop	eax
 10325 00003D1C FEC0                <1> 	inc	al  ; i++
 10326 00003D1E FECD                <1> 	dec	ch
 10327 00003D20 75F1                <1> 	jnz	short bfn_rvs_4
 10328                              <1> 
 10329                              <1> 	; outb(VGAREG_ACTL_ADDRESS, ar_index);
 10330                              <1> 	;mov	dx, VGAREG_ACTL_ADDRESS ; 3C0h
 10331                              <1> 	;mov	dl, 0C0h
 10332 00003D22 88E0                <1> 	mov	al, ah ; ar_index
 10333 00003D24 EE                  <1> 	out	dx, al
 10334                              <1> 
 10335                              <1> 	; inb(VGAREG_ACTL_RESET);
 10336                              <1> 	;mov	dx, VGAREG_ACTL_RESET ; 3DAh
 10337 00003D25 B2DA                <1> 	mov	dl, 0DAh
 10338 00003D27 EC                  <1> 	in	al, dx
 10339                              <1> 
 10340                              <1>         ; for(i=0;i<=8;i++) {
 10341 00003D28 28C0                <1> 	sub	al, al ; 0
 10342                              <1> 	;;mov	dx, VGAREG_GRDC_ADDRESS ; 3CEh
 10343                              <1> 	;mov	dl, 0CEh
 10344 00003D2A B509                <1> 	mov	ch, 9
 10345                              <1> bfn_rvs_5:
 10346                              <1> 	; outb(VGAREG_GRDC_ADDRESS,i)
 10347                              <1> 	;mov	dx, VGAREG_GRDC_ADDRESS ; 3CEh
 10348 00003D2C B2CE                <1> 	mov	dl, 0CEh
 10349 00003D2E EE                  <1> 	out	dx, al
 10350                              <1> 	; outb(VGAREG_ACTL_READ_DATA)
 10351 00003D2F 50                  <1> 	push	eax
 10352                              <1> 	;mov	dx, VGAREG_GRDC_DATA ; 3CFh
 10353                              <1> 	;mov	dl, 0CFh
 10354 00003D30 FEC2                <1> 	inc	dl
 10355 00003D32 AC                  <1> 	lodsb	; (9 bytes in loop)
 10356 00003D33 EE                  <1> 	out	dx, al
 10357 00003D34 58                  <1> 	pop	eax
 10358                              <1> 	;dec	dl
 10359 00003D35 FEC0                <1> 	inc	al  ; i++
 10360 00003D37 FECD                <1> 	dec	ch
 10361 00003D39 75F1                <1> 	jnz	short bfn_rvs_5
 10362                              <1> 
 10363                              <1> 	; BX += 2; /* crtc_addr */     ; 3D4h
 10364                              <1>         ; BX += 4; /* plane latches */ ; 0
 10365 00003D3B 83C606              <1> 	add	esi, 6	      
 10366 00003D3E 56                  <1> 	push	esi ; *	
 10367                              <1> 
 10368                              <1> 	;outb(VGAREG_SEQU_ADDRESS, read_byte(ES, addr1)); addr1++;
 10369                              <1>         ;outb(crtc_addr, read_byte(ES, addr1)); addr1++;
 10370                              <1>         ;outb(VGAREG_GRDC_ADDRESS, read_byte(ES, addr1)); addr1++;
 10371                              <1>         ;addr1++;
 10372                              <1>         ;outb(crtc_addr - 0x4 + 0xa, read_byte(ES, addr1)); addr1++;
 10373                              <1> 
 10374 00003D3F 89FE                <1> 	mov	esi, edi ; start of state buffer
 10375                              <1> 
 10376                              <1> 	;mov	dx, VGAREG_SEQU_ADDRESS ; 3C7h
 10377 00003D41 B2C7                <1> 	mov	dl, 0C7h 
 10378 00003D43 AC                  <1> 	lodsb
 10379 00003D44 EE                  <1> 	out	dx, al
 10380                              <1> 	;mov	dx, VGAREG_VGA_CRTC_ADDRESS ; 3D4h
 10381 00003D45 B2D4                <1> 	mov	dl, 0D4h
 10382 00003D47 AC                  <1> 	lodsb
 10383 00003D48 EE                  <1> 	out	dx, al
 10384                              <1> 	;mov	dx, VGAREG_GRDC_ADDRESS ; 3CEh 
 10385 00003D49 B2CE                <1>         mov	dl, 0CEh
 10386 00003D4B AC                  <1> 	lodsb
 10387 00003D4C EE                  <1> 	out	dx, al
 10388 00003D4D AC                  <1> 	lodsb	; addr1++
 10389                              <1> 	;mov	dx, VGAREG_VGA_WRITE_FEATURE_CTL ; 3DAh
 10390 00003D4E B2DA                <1> 	mov	dl, 0DAh
 10391 00003D50 AC                  <1> 	lodsb
 10392 00003D51 EE                  <1> 	out	dx, al
 10393                              <1> 
 10394 00003D52 5E                  <1> 	pop	esi ; *
 10395                              <1> 
 10396                              <1> 	; (total 70 bytes are read above as controller hardware state)
 10397                              <1> 
 10398                              <1> bfn_rvs_6:		
 10399                              <1> 	; 13/01/2021
 10400 00003D53 F6C102              <1> 	test	cl, 2
 10401 00003D56 747D                <1> 	jz	short bfn_rvs_9
 10402                              <1> 
 10403                              <1> 	; VIDEO BIOS DATA
 10404                              <1> 	; !!! this data is valid for TRDOS 386 v2 kernel only !!!
 10405                              <1> 	; (this is not same with BOCHS/PLEX86 video bios, BIOS data)  
 10406                              <1>   
 10407                              <1>     	; if (CX & 2) {
 10408                              <1> 	;write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE, read_byte(ES, BX)); BX++;
 10409                              <1>         ;write_word(BIOSMEM_SEG,BIOSMEM_NB_COLS, read_word(ES, BX)); BX += 2;
 10410                              <1>         ;write_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE, read_word(ES, BX)); BX += 2;
 10411                              <1>         ;write_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS, read_word(ES, BX)); BX += 2;
 10412                              <1>         ;write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, read_byte(ES, BX)); BX++;
 10413                              <1>         ;write_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT, read_word(ES, BX)); BX += 2;
 10414                              <1>         ;write_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL, read_byte(ES, BX)); BX++;
 10415                              <1>         ;write_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES, read_byte(ES, BX)); BX++;
 10416                              <1>         ;write_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL, read_byte(ES, BX)); BX++;
 10417                              <1>         ;write_word(BIOSMEM_SEG,BIOSMEM_CURSOR_TYPE, read_word(ES, BX)); BX += 2;
 10418                              <1>         ;for(i=0;i<8;i++) {
 10419                              <1>         ;   write_word(BIOSMEM_SEG, BIOSMEM_CURSOR_POS+2*i, read_word(ES, BX));
 10420                              <1>         ;   BX += 2;
 10421                              <1>         ;}
 10422                              <1>         ;write_word(BIOSMEM_SEG,BIOSMEM_CURRENT_START, read_word(ES, BX)); BX += 2;
 10423                              <1>         ;write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE, read_byte(ES, BX)); BX++;
 10424                              <1>         ;/* current font */
 10425                              <1>         ;write_word(0, 0x1f * 4, read_word(ES, BX)); BX += 2;
 10426                              <1>         ;write_word(0, 0x1f * 4 + 2, read_word(ES, BX)); BX += 2;
 10427                              <1>         ;write_word(0, 0x43 * 4, read_word(ES, BX)); BX += 2;
 10428                              <1>         ;write_word(0, 0x43 * 4 + 2, read_word(ES, BX)); BX += 2;
 10429                              <1> 
 10430                              <1> 	; !!! save TRDOS 386 v2 kernel spesific video bios data !!!
 10431                              <1> 	; (which is/are used by 'SET_MODE' function and/or it's sub functions)
 10432                              <1> 
 10433 00003D58 66AD                <1> 	lodsw	 ; CRTC_ADDR, always 3D4h (color VGA) for TRDOS 386 v2
 10434                              <1> 	; skip 3D4h check if it is already checked
 10435 00003D5A F6C101              <1> 	test	cl, 1
 10436 00003D5D 7508                <1> 	jnz	short bfn_rvs_7
 10437 00003D5F 663DD403            <1> 	cmp	ax, 3D4h
 10438 00003D63 7402                <1> 	je	short bfn_rvs_7
 10439 00003D65 F9                  <1> 	stc
 10440 00003D66 C3                  <1> 	retn
 10441                              <1> bfn_rvs_7:
 10442 00003D67 AC                  <1> 	lodsb
 10443 00003D68 A2[1E670000]        <1> 	mov	[CRT_MODE], al ; Current video mode (0FFh for VESA VBE modes) 
 10444 00003D6D AC                  <1> 	lodsb
 10445 00003D6E A2[1F670000]        <1> 	mov	[CRT_MODE_SET], al ; 29h for mode 03h ; TRDOS 386 feature only !
 10446 00003D73 66AD                <1> 	lodsw	
 10447 00003D75 66A3[D20F0300]      <1>  	mov	[video_mode], ax ; Current VESA VBE (SVGA, extended VGA) mode 
 10448 00003D7B 66AD                <1> 	lodsw		 ; (valid if [CRT_MODE] = 0FFh)	
 10449 00003D7D 66A3[DC830100]      <1> 	mov	[CRT_LEN], ax ; page size (in bytes)
 10450 00003D83 66AD                <1> 	lodsw
 10451 00003D85 66A3[64770100]      <1> 	mov	[CRT_START], ax ; video page start offset
 10452 00003D8B AC                  <1>  	lodsb
 10453 00003D8C A2[20670000]        <1> 	mov	[CRT_COLS], al ; nbcols, characters per row
 10454 00003D91 AC                  <1> 	lodsb
 10455 00003D92 A2[26670000]        <1> 	mov	[VGA_ROWS], al ; nbrows, (character) rows per page (not rows-1)
 10456 00003D97 AC                  <1> 	lodsb
 10457 00003D98 A2[22670000]        <1> 	mov	[CHAR_HEIGHT], al ; character font height (8 or 16 or 14)
 10458 00003D9D AC                  <1> 	lodsb
 10459 00003D9E A2[23670000]        <1> 	mov	[VGA_VIDEO_CTL], al ; ROM BIOS DATA AREA Offset 87h
 10460 00003DA3 AC                  <1> 	lodsb
 10461 00003DA4 A2[24670000]        <1> 	mov	[VGA_SWITCHES], al ; feature bit switches
 10462 00003DA9 AC                  <1> 	lodsb
 10463 00003DAA A2[25670000]        <1> 	mov	[VGA_MODESET_CTL], al ; basic mode set options
 10464                              <1> 	; followings are only used by TRDOS 386 v2 (IBM PC/AT ROMBIOS) code 
 10465                              <1> 	; (bochs/plex86 does not use and return those)
 10466 00003DAF AC                  <1> 	lodsb
 10467 00003DB0 A2[21670000]        <1> 	mov	[CRT_PALETTE], al ; current color palette ; TRDOS 386 feature only !
 10468 00003DB5 AC                  <1> 	lodsb
 10469 00003DB6 A2[76770100]        <1> 	mov	[ACTIVE_PAGE], al ; current video page 
 10470 00003DBB 66AD                <1> 	lodsw
 10471 00003DBD 66A3[37670000]      <1> 	mov	[CURSOR_MODE], ax ; cursor type
 10472                              <1> 	;lodsd
 10473                              <1> 	;mov	[CURSOR_POSN], eax ; cursor position for video page 0 and 1 
 10474                              <1> 	;lodsd
 10475                              <1> 	;mov	[CURSOR_POSN+4], eax ; cursor position for video page 2 and 3 
 10476                              <1> 	;lodsd
 10477                              <1> 	;mov	[CURSOR_POSN+8], eax ; cursor position for video page 4 and 5 
 10478                              <1> 	;lodsd
 10479                              <1> 	;mov	[CURSOR_POSN+12], eax ; cursor position for video page 6 and 7 
 10480 00003DC3 B504                <1> 	mov	ch, 4
 10481 00003DC5 BF[66770100]        <1> 	mov	edi, CURSOR_POSN
 10482                              <1> bfn_rvs_8:
 10483 00003DCA A5                  <1> 	movsd
 10484 00003DCB FECD                <1> 	dec	ch
 10485 00003DCD 75FB                <1> 	jnz	short bfn_rvs_8
 10486                              <1> 	; (font addr) protected mode address in kernel's/system memory space 
 10487                              <1> 	; (not accessable/meaningful address value by user)
 10488 00003DCF AD                  <1> 	lodsd
 10489 00003DD0 A3[EE830100]        <1> 	mov	[VGA_INT43H], eax ; VGA current (default) font address
 10490                              <1> 
 10491                              <1> 	; (total 40 bytes are read&written above as BIOS data state)
 10492                              <1> bfn_rvs_9:
 10493                              <1> 	; 13/01/2021
 10494 00003DD5 F6C104              <1> 	test	cl, 4
 10495 00003DD8 7421                <1> 	jz	short bfn_rvs_11
 10496                              <1> 
 10497                              <1> 	;BX++;
 10498                              <1>         ;v = read_byte(ES, BX); BX++;
 10499                              <1>         ;outb(VGAREG_PEL_MASK, read_byte(ES, BX)); BX++;
 10500                              <1>         ;// Set the whole dac always, from 0
 10501                              <1>         ;outb(VGAREG_DAC_WRITE_ADDRESS,0x00);
 10502                              <1>         ;for(i=0;i<256*3;i++) {
 10503                              <1>         ;   outb(VGAREG_DAC_DATA, read_byte(ES, BX)); BX++;
 10504                              <1>         ;}
 10505                              <1>         ;BX++;
 10506                              <1>         ;outb(VGAREG_DAC_WRITE_ADDRESS, v);
 10507                              <1> 
 10508                              <1> 	; /* read/write mode dac */
 10509 00003DDA AC                  <1> 	lodsb	; skip ; VGAREG_DAC_STATE
 10510 00003DDB AC                  <1> 	lodsb
 10511 00003DDC 88C4                <1> 	mov	ah, al ; * ; v
 10512 00003DDE AC                  <1> 	lodsb
 10513 00003DDF 66BAC603            <1> 	mov	dx, VGAREG_PEL_MASK  ; 3C6h
 10514 00003DE3 EE                  <1> 	out	dx, al
 10515                              <1> 	;// Set the whole dac always, from 0
 10516 00003DE4 30C0                <1> 	xor	al, al ; 0
 10517                              <1> 	;mov	dx, VGAREG_DAC_WRITE_ADDRESS ; 3C8h
 10518 00003DE6 B2C8                <1> 	mov	dl, 0C8h
 10519 00003DE8 EE                  <1> 	out	dx, al
 10520                              <1> 
 10521 00003DE9 51                  <1> 	push	ecx ; 22/01/2021
 10522                              <1> 	;for(i=0;i<256*3;i++) {
 10523                              <1> 	;mov	ecx, 256*3 ; 768 bytes
 10524                              <1> 	; 03/08/2022
 10525 00003DEA 29C9                <1> 	sub	ecx, ecx
 10526 00003DEC B503                <1> 	mov	ch, 3
 10527                              <1> 	; ecx = 300h = 768
 10528                              <1> 	;mov	dx, VGAREG_DAC_DATA ; 3C9h
 10529                              <1> 	;mov	dl, 0C9h
 10530 00003DEE FEC2                <1> 	inc	dl ; dx = 3C9h
 10531                              <1> bfn_rvs_10:
 10532 00003DF0 AC                  <1> 	lodsb
 10533 00003DF1 EE                  <1> 	out	dx, al
 10534 00003DF2 E2FC                <1> 	loop	bfn_rvs_10
 10535 00003DF4 59                  <1> 	pop	ecx ; 22/01/2021
 10536                              <1> 
 10537                              <1> 	; /* color select register */
 10538 00003DF5 AC                  <1> 	lodsb	 ; skip 
 10539                              <1> 	
 10540 00003DF6 88E0                <1> 	mov	al, ah ; * ; v
 10541                              <1> 
 10542                              <1> 	;mov	dx, VGAREG_DAC_WRITE_ADDRESS ; 3C8h
 10543                              <1> 	;mov	dl, 0C8h
 10544 00003DF8 FECA                <1> 	dec	dl ; dx  = 3C8h
 10545 00003DFA EE                  <1> 	out	dx, al ; * ; v
 10546                              <1> 	
 10547                              <1> 	; (total 772 bytes are read above as DAC state)
 10548                              <1> bfn_rvs_11:
 10549 00003DFB C3                  <1> 	retn
 10550                              <1> 
 10551                              <1> vbe_biosfn_restore_video_state:
 10552                              <1> 	; 23/01/2021
 10553                              <1> 	; 13/01/2021 (TRDOS 386 v2.0.3)
 10554                              <1> 	; (vbe.c)
 10555                              <1> 
 10556                              <1> 	; modified registers: eax, edx, esi, ch
 10557                              <1> 	
 10558                              <1> 	; input: esi = state buffer address
 10559                              <1> 	; output: 
 10560                              <1> 	;	 VBE DISPI register contents will be restored
 10561                              <1> 	;	 (18 bytes, 9 words)
 10562                              <1> 
 10563                              <1>  	; enable = read_word(ES, BX);
 10564                              <1> 	; BX += 2;
 10565                              <1> 	;
 10566                              <1> 	; if (!(enable & VBE_DISPI_ENABLED)) {
 10567                              <1>         ;   outw(VBE_DISPI_IOPORT_INDEX,VBE_DISPI_INDEX_ENABLE);
 10568                              <1>         ;   outw(VBE_DISPI_IOPORT_DATA, enable);
 10569                              <1> 	; } else {
 10570                              <1>         ;   outw(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_XRES);
 10571                              <1>         ;   outw(VBE_DISPI_IOPORT_DATA, read_word(ES, BX));
 10572                              <1>         ;   BX += 2;
 10573                              <1>         ;   outw(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_YRES);
 10574                              <1>         ;   outw(VBE_DISPI_IOPORT_DATA, read_word(ES, BX));
 10575                              <1>         ;   BX += 2;
 10576                              <1>         ;   outw(VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_BPP);
 10577                              <1>         ;   outw(VBE_DISPI_IOPORT_DATA, read_word(ES, BX));
 10578                              <1>         ;   BX += 2;
 10579                              <1>         ;   outw(VBE_DISPI_IOPORT_INDEX,VBE_DISPI_INDEX_ENABLE);
 10580                              <1>         ;   outw(VBE_DISPI_IOPORT_DATA, enable);
 10581                              <1> 	;
 10582                              <1>         ;  for(i = VBE_DISPI_INDEX_BANK; i <= VBE_DISPI_INDEX_Y_OFFSET; i++)
 10583                              <1> 	;    {
 10584                              <1>         ;     outw(VBE_DISPI_IOPORT_INDEX, i);
 10585                              <1>         ;     outw(VBE_DISPI_IOPORT_DATA, read_word(ES, BX));
 10586                              <1>         ;     BX += 2;
 10587                              <1>         ;    }
 10588                              <1>         ; }
 10589                              <1> 
 10590 00003DFC 66AD                <1> 	lodsw	; enable (status, enabled=1, disabled=0)
 10591 00003DFE 66BACE01            <1> 	mov	dx, 01CEh ; VBE_DISPI_IOPORT_INDEX
 10592                              <1> 	; 23/01/2021
 10593 00003E02 6683E001            <1> 	and	ax, 1 ; VBE_DISPI_ENABLED
 10594 00003E06 750B                <1> 	jnz	short vbe_bfn_rvs_1
 10595                              <1> 	; ax = 0
 10596                              <1> 	; VBE_DISPI_DISABLED
 10597                              <1> vbe_bfn_rvs_0:
 10598                              <1> 	; enable (disable) dispi
 10599                              <1> 	; dx = 01CEh ; VBE_DISPI_IOPORT_INDEX
 10600                              <1> 	; ah = 0
 10601 00003E08 50                  <1> 	push	eax
 10602 00003E09 B004                <1> 	mov	al, 04h	; VBE_DISPI_INDEX_ENABLE
 10603 00003E0B 66EF                <1> 	out	dx, ax
 10604                              <1> 	;mov	dx, 01CFh ; VBE_DISPI_IOPORT_DATA
 10605 00003E0D FEC2                <1> 	inc	dl
 10606 00003E0F 58                  <1> 	pop	eax
 10607 00003E10 66EF                <1> 	out	dx, ax ; enable (or disable)
 10608 00003E12 C3                  <1> 	retn
 10609                              <1> vbe_bfn_rvs_1:
 10610                              <1> 	; VBE_DISPI_ENABLED
 10611                              <1> 
 10612                              <1> 	; from VBE_DISPI_INDEX_XRES
 10613                              <1> 	;   to VBE_DISPI_INDEX_BPP	
 10614                              <1> 
 10615 00003E13 B503                <1>  	mov	ch, 3
 10616 00003E15 28C0                <1> 	sub	al, al ; 0 ; VBE_DISPI_INDEX_XRES - 1
 10617                              <1> 	; ax = 0
 10618                              <1> 
 10619 00003E17 E80B000000          <1> 	call	vbe_bfn_rvs_2
 10620                              <1> 
 10621                              <1>         ;outw(VBE_DISPI_IOPORT_INDEX,VBE_DISPI_INDEX_ENABLE);
 10622                              <1> 	;outw(VBE_DISPI_IOPORT_DATA, enable);
 10623                              <1> 
 10624                              <1> 	; 23/01/2021
 10625 00003E1C B001                <1> 	mov	al, 1 ; VBE_DISPI_ENABLED
 10626                              <1> 	; ax = 1
 10627 00003E1E E8E5FFFFFF          <1> 	call	vbe_bfn_rvs_0
 10628                              <1> 
 10629                              <1> 	; from VBE_DISPI_INDEX_BANK
 10630                              <1> 	;   to VBE_DISPI_INDEX_Y_OFFSET
 10631                              <1> 
 10632 00003E23 B505                <1> 	mov	ch, 5
 10633                              <1> 	; 23/01/2021
 10634 00003E25 B004                <1> 	mov	al, 4  ; VBE_DISPI_INDEX_BANK - 1
 10635                              <1> 	; ax = 4
 10636                              <1> vbe_bfn_rvs_2:
 10637 00003E27 FEC0                <1> 	inc	al ; from VBE_DISPI_INDEX_XRES
 10638                              <1> 		     ; to VBE_DISPI_INDEX_BPP	
 10639                              <1> 	;mov	dx, 01CEh ; VBE_DISPI_IOPORT_INDEX
 10640                              <1> 	;mov	dl, 0CEh
 10641 00003E29 66EF                <1> 	out	dx, ax
 10642 00003E2B 50                  <1> 	push	eax
 10643                              <1> 	;mov	dx, 01CFh ; VBE_DISPI_IOPORT_DATA
 10644 00003E2C FEC2                <1> 	inc	dl ; 1CFh
 10645 00003E2E 66AD                <1> 	lodsw
 10646 00003E30 66EF                <1> 	out	dx, ax
 10647 00003E32 58                  <1> 	pop	eax
 10648 00003E33 FECA                <1> 	dec	dl ; 1CEh
 10649 00003E35 FECD                <1> 	dec	ch
 10650 00003E37 75EE                <1> 	jnz	short vbe_bfn_rvs_2		
 10651 00003E39 C3                  <1> 	retn
 10652                              <1> 
 10653                              <1> ; ---------------------------------------------------------
 10654                              <1>  
 10655                              <1> dispi_set_enable:
 10656                              <1> 	; 03/08/2022
 10657                              <1> 	; 23/11/2020
 10658                              <1> 	; Input:
 10659                              <1> 	;	ax = VBE_DISPI_ENABLED = 1
 10660                              <1> 	;	     or VBE_DISPI_DISABLED = 0
 10661                              <1> 	;
 10662                              <1> 	; Modified registers: none
 10663                              <1> 	
 10664                              <1> 	;push	edx
 10665                              <1> 	;push	eax
 10666                              <1> 	;mov	dx, 01CEh ; VBE_DISPI_IOPORT_INDEX
 10667                              <1> 	;mov	ax, 04h	  ; VBE_DISPI_INDEX_ENABLE
 10668                              <1> 	;out	dx, ax
 10669                              <1> 	;pop	eax
 10670                              <1> 	;;mov	dx, 01CFh ; VBE_DISPI_IOPORT_DATA
 10671                              <1> 	;;mov	dl, 0CFh
 10672                              <1> 	;inc	dl
 10673                              <1> 	;out	dx, ax
 10674                              <1> 	;pop	edx
 10675                              <1> 	;retn
 10676                              <1> 
 10677                              <1> 	; 25/11/2020
 10678                              <1> 	; Modified registers: edx
 10679                              <1> 	;;push	edx
 10680                              <1> 	;mov	dx, 04h ; VBE_DISPI_INDEX_ENABLE
 10681                              <1> 	; 03/08/2022
 10682 00003E3A 28F6                <1> 	sub	dh, dh
 10683 00003E3C B204                <1> 	mov	dl, 04h ; VBE_DISPI_INDEX_ENABLE
 10684                              <1> 
 10685                              <1> 	;;call	dispi_set_parms
 10686                              <1> 	;;pop	edx
 10687                              <1> 	;;retn
 10688                              <1> 	;jmp	short dispi_set_parms
 10689                              <1> 
 10690                              <1> dispi_set_parms:
 10691                              <1> 	; 03/08/2022
 10692                              <1> 	; 25/11/2020
 10693                              <1> 	; Input:
 10694                              <1> 	;	ax = data
 10695                              <1> 	;	dx = vbe dispi register index
 10696                              <1> 	;
 10697                              <1> 	; Modified registers: edx
 10698                              <1> 
 10699 00003E3E 50                  <1> 	push	eax
 10700                              <1> 	;mov	ax, dx
 10701                              <1> 	; 03/08/2022
 10702 00003E3F 89D0                <1> 	mov	eax, edx
 10703 00003E41 66BACE01            <1> 	mov	dx, 01CEh ; VBE_DISPI_IOPORT_INDEX
 10704 00003E45 66EF                <1> 	out	dx, ax
 10705 00003E47 58                  <1> 	pop	eax
 10706                              <1> 	;mov	dx, 01CFh ; VBE_DISPI_IOPORT_DATA
 10707                              <1> 	;mov	dl, 0CFh
 10708 00003E48 FEC2                <1> 	inc	dl
 10709 00003E4A 66EF                <1> 	out	dx, ax
 10710 00003E4C C3                  <1> 	retn
 10711                              <1> 
 10712                              <1> dispi_set_bpp:
 10713                              <1> 	; 03/08/2022
 10714                              <1> 	; 25/11/2020
 10715                              <1> 	; Input:
 10716                              <1> 	;	ax = Bits per pixel value
 10717                              <1> 	;	     (8,16,24,32)
 10718                              <1> 	;
 10719                              <1> 	; Modified registers: none
 10720                              <1> 
 10721                              <1> 	;push	edx
 10722                              <1> 	;push	eax
 10723                              <1> 	;mov	dx, 01CEh ; VBE_DISPI_IOPORT_INDEX
 10724                              <1> 	;mov	ax, 03h	  ; VBE_DISPI_INDEX_BPP
 10725                              <1> 	;out	dx, ax
 10726                              <1> 	;pop	eax
 10727                              <1> 	;;mov	dx, 01CFh ; VBE_DISPI_IOPORT_DATA
 10728                              <1> 	;;mov	dl, 0CFh
 10729                              <1> 	;inc	dl
 10730                              <1> 	;out	dx, ax
 10731                              <1> 	;pop	edx
 10732                              <1> 	;retn
 10733                              <1> 
 10734                              <1> 	; 25/11/2020
 10735                              <1> 	; Modified registers: edx
 10736                              <1> 	;;push	edx
 10737                              <1> 	;mov	dx, 03h ; VBE_DISPI_INDEX_BPP
 10738                              <1> 	; 03/08/2022
 10739 00003E4D 28F6                <1> 	sub	dh, dh
 10740 00003E4F B203                <1> 	mov	dl, 03h ; VBE_DISPI_INDEX_BPP	
 10741                              <1> 
 10742                              <1> 	;;call	dispi_set_parms
 10743                              <1> 	;;pop	edx
 10744                              <1> 	;;retn
 10745 00003E51 EBEB                <1> 	jmp	short dispi_set_parms
 10746                              <1> 
 10747                              <1> dispi_set_xres:
 10748                              <1> 	; 03/08/2022
 10749                              <1> 	; 25/11/2020
 10750                              <1> 	; Input:
 10751                              <1> 	;	ax = X resolution (screen witdh)
 10752                              <1> 	;	     (320,640,800,1024,1280,1920)
 10753                              <1> 	;
 10754                              <1> 	; Modified registers: none
 10755                              <1> 
 10756                              <1> 	;push	edx
 10757                              <1> 	;push	eax
 10758                              <1> 	;mov	dx, 01CEh ; VBE_DISPI_IOPORT_INDEX
 10759                              <1> 	;mov	ax, 01h	  ; VBE_DISPI_INDEX_XRES
 10760                              <1> 	;out	dx, ax
 10761                              <1> 	;pop	eax
 10762                              <1> 	;;mov	dx, 01CFh ; VBE_DISPI_IOPORT_DATA
 10763                              <1> 	;;mov	dl, 0CFh
 10764                              <1> 	;inc	dl
 10765                              <1> 	;out	dx, ax
 10766                              <1> 	;pop	edx
 10767                              <1> 	;retn
 10768                              <1> 
 10769                              <1> 	; 25/11/2020
 10770                              <1> 	; Modified registers: edx
 10771                              <1> 	;;push	edx
 10772                              <1> 	;mov	dx, 01h ; VBE_DISPI_INDEX_XRES
 10773                              <1> 	; 03/08/2022
 10774 00003E53 28F6                <1> 	sub	dh, dh
 10775 00003E55 B201                <1> 	mov	dl, 01h ; VBE_DISPI_INDEX_XRES
 10776                              <1> 	;;call	dispi_set_parms
 10777                              <1> 	;;pop	edx
 10778                              <1> 	;;retn
 10779 00003E57 EBE5                <1> 	jmp	short dispi_set_parms
 10780                              <1> 
 10781                              <1> dispi_set_yres:
 10782                              <1> 	; 03/08/2022
 10783                              <1> 	; 25/11/2020
 10784                              <1> 	; Input:
 10785                              <1> 	;	ax = Y resolution (screen height)
 10786                              <1> 	;	     (200,400,600,720,768,1080)
 10787                              <1> 	;
 10788                              <1> 	; Modified registers: none
 10789                              <1> 
 10790                              <1> 	;push	edx
 10791                              <1> 	;push	eax
 10792                              <1> 	;mov	dx, 01CEh ; VBE_DISPI_IOPORT_INDEX
 10793                              <1> 	;mov	ax, 02h	  ; VBE_DISPI_INDEX_YRES
 10794                              <1> 	;out	dx, ax
 10795                              <1> 	;pop	eax
 10796                              <1> 	;;mov	dx, 01CFh ; VBE_DISPI_IOPORT_DATA
 10797                              <1> 	;;mov	dl, 0CFh
 10798                              <1> 	;inc	dl
 10799                              <1> 	;out	dx, ax
 10800                              <1> 	;pop	edx
 10801                              <1> 	;retn
 10802                              <1> 
 10803                              <1> 	; 25/11/2020
 10804                              <1> 	; Modified registers: edx
 10805                              <1> 	;;push	edx
 10806                              <1> 	;mov	dx, 02h ; VBE_DISPI_INDEX_YRES
 10807                              <1> 	; 03/08/2022
 10808 00003E59 28F6                <1> 	sub	dh, dh
 10809 00003E5B B202                <1> 	mov	dl, 02h ; VBE_DISPI_INDEX_YRES
 10810                              <1> 	;;call	dispi_set_parms
 10811                              <1> 	;;pop	edx
 10812                              <1> 	;;retn
 10813 00003E5D EBDF                <1> 	jmp	short dispi_set_parms
 10814                              <1> 
 10815                              <1> dispi_set_bank:
 10816                              <1> 	; 03/08/2022
 10817                              <1> 	; 25/11/2020
 10818                              <1> 	; Input:
 10819                              <1> 	;	ax = video memory bank number
 10820                              <1> 	;
 10821                              <1> 	; Modified registers: none
 10822                              <1> 
 10823                              <1> 	;push	edx
 10824                              <1> 	;push	eax
 10825                              <1> 	;mov	dx, 01CEh ; VBE_DISPI_IOPORT_INDEX
 10826                              <1> 	;mov	ax, 05h	  ; VBE_DISPI_INDEX_BANK
 10827                              <1> 	;out	dx, ax
 10828                              <1> 	;pop	eax
 10829                              <1> 	;;mov	dx, 01CFh ; VBE_DISPI_IOPORT_DATA
 10830                              <1> 	;;mov	dl, 0CFh
 10831                              <1> 	;inc	dl
 10832                              <1> 	;out	dx, ax
 10833                              <1> 	;pop	edx
 10834                              <1> 	;retn
 10835                              <1> 	
 10836                              <1> 	; 25/11/2020
 10837                              <1> 	; Modified registers: edx
 10838                              <1> 	;;push	edx
 10839                              <1> 	;mov	dx, 05h	; VBE_DISPI_INDEX_BANK
 10840                              <1> 	; 03/08/2022
 10841 00003E5F 28F6                <1> 	sub	dh, dh
 10842 00003E61 B205                <1> 	mov	dl, 05h	; VBE_DISPI_INDEX_BANK
 10843                              <1> 	;;call	dispi_set_parms
 10844                              <1> 	;;pop	edx
 10845                              <1> 	;;retn
 10846 00003E63 EBD9                <1> 	jmp	short dispi_set_parms
 10847                              <1> 
 10848                              <1> dispi_get_enable:
 10849                              <1> 	; 03/08/2022
 10850                              <1> 	; 27/11/2020
 10851                              <1> 	; Input:
 10852                              <1> 	;	none
 10853                              <1> 	; Output:
 10854                              <1> 	;	ax = vbe dispi status
 10855                              <1> 	;
 10856                              <1> 	; Modified registers: eax
 10857                              <1> 	
 10858                              <1> 	;push	edx
 10859                              <1> 	;mov	dx, 01CEh ; VBE_DISPI_IOPORT_INDEX
 10860                              <1> 	;mov	ax, 04h	  ; VBE_DISPI_INDEX_ENABLE
 10861                              <1> 	;out	dx, ax
 10862                              <1> 	;;mov	dx, 01CFh ; VBE_DISPI_IOPORT_DATA
 10863                              <1> 	;;mov	dl, 0CFh
 10864                              <1> 	;inc	dl
 10865                              <1> 	;in	ax, dx
 10866                              <1> 	;pop	edx
 10867                              <1> 	;retn
 10868                              <1> 
 10869                              <1> 	; 27/11/2020
 10870                              <1> 	; Modified registers: eax, edx
 10871                              <1> 	;;push	edx
 10872                              <1> 	;mov	ax, 04h ; VBE_DISPI_INDEX_ENABLE
 10873                              <1> 	; 03/08/2022
 10874 00003E65 28E4                <1> 	sub	ah, ah
 10875 00003E67 B004                <1> 	mov	al, 04h ; VBE_DISPI_INDEX_ENABLE
 10876                              <1> 
 10877                              <1> 	;;call	dispi_get_parms
 10878                              <1> 	;;pop	edx
 10879                              <1> 	;;retn
 10880                              <1> 	;jmp	short dispi_get_parms
 10881                              <1> 
 10882                              <1> dispi_get_parms:
 10883                              <1> 	; 25/11/2020
 10884                              <1> 	; Input:
 10885                              <1> 	;	ax = vbe dispi register index
 10886                              <1> 	; output:
 10887                              <1> 	;	ax = data
 10888                              <1> 	;
 10889                              <1> 	; Modified registers: eax, edx
 10890                              <1> 
 10891 00003E69 66BACE01            <1> 	mov	dx, 01CEh ; VBE_DISPI_IOPORT_INDEX
 10892 00003E6D 66EF                <1> 	out	dx, ax
 10893                              <1> 	;mov	dx, 01CFh ; VBE_DISPI_IOPORT_DATA
 10894                              <1> 	;mov	dl, 0CFh
 10895 00003E6F FEC2                <1> 	inc	dl
 10896 00003E71 66ED                <1> 	in	ax, dx
 10897 00003E73 C3                  <1> 	retn
 10898                              <1> 
 10899                              <1> vga_compat_setup:
 10900                              <1> 	; 03/08/2022
 10901                              <1> 	; 26/11/2020
 10902                              <1> 	; 25/11/2020
 10903                              <1> 	; VGA compatibility setup
 10904                              <1> 	; (vbe.c, 02/01/2020, vruppert)
 10905                              <1> 	;
 10906                              <1> 	; Input:
 10907                              <1> 	;	none
 10908                              <1> 	;
 10909                              <1> 	; Modified registers: eax, edx
 10910                              <1> 	
 10911                              <1> 	; 26/11/2020
 10912                              <1>   	;push	eax
 10913                              <1>   	;push	edx
 10914                              <1> 
 10915                              <1>   	; set CRT X resolution
 10916 00003E74 66BACE01            <1>   	mov	dx, 1CEh ; VBE_DISPI_IOPORT_INDEX
 10917                              <1>   	;mov	ax, 01h  ; VBE_DISPI_INDEX_XRES
 10918                              <1>   	; 03/08/2022
 10919 00003E78 31C0                <1> 	xor	eax, eax
 10920 00003E7A FEC0                <1> 	inc	al
 10921                              <1> 	; eax = 1
 10922 00003E7C 66EF                <1> 	out	dx, ax
 10923                              <1>   	;mov	dx, 1CFh ; VBE_DISPI_IOPORT_DATA
 10924 00003E7E FEC2                <1>   	inc	dl
 10925 00003E80 66ED                <1> 	in	ax, dx
 10926 00003E82 50                  <1> 	push	eax
 10927 00003E83 66BAD403            <1> 	mov	dx, 3D4h ; VGAREG_VGA_CRTC_ADDRESS
 10928 00003E87 66B81100            <1> 	mov	ax, 0011h ; Vertical retrace end register
 10929 00003E8B 66EF                <1>   	out	dx, ax
 10930                              <1>   	;pop	eax
 10931                              <1>   	;push	eax
 10932 00003E8D 8B0424              <1>   	mov	eax, [esp]
 10933                              <1> 	;shr	ax, 3 ; / 8 for pixel to character
 10934                              <1> 	;dec	ax  ; - 1 (EGA or VGA?)
 10935                              <1>   	; 03/08/2022
 10936 00003E90 C1E803              <1> 	shr	eax, 3
 10937 00003E93 48                  <1>   	dec	eax
 10938 00003E94 88C4                <1> 	mov	ah, al
 10939 00003E96 B001                <1>   	mov	al, 01h ; Horizontal display end register
 10940 00003E98 66EF                <1>   	out	dx, ax
 10941 00003E9A 58                  <1>   	pop	eax
 10942                              <1> 
 10943 00003E9B E89C000000          <1> 	call	vga_set_virt_width
 10944                              <1> 
 10945                              <1>   	; set CRT Y resolution
 10946                              <1> 	; 03/08/2022
 10947 00003EA0 66BACE01            <1>   	mov	dx, 1CEh ; VBE_DISPI_IOPORT_INDEX
 10948 00003EA4 66B80200            <1>   	mov	ax, 02h  ; VBE_DISPI_INDEX_YRES
 10949 00003EA8 66EF                <1>   	out	dx, ax
 10950                              <1>   	;mov	dx, 1CFh ; VBE_DISPI_IOPORT_DATA
 10951                              <1> 	; 03/08/2022
 10952 00003EAA FEC2                <1>   	inc	dl
 10953 00003EAC 66ED                <1> 	in	ax, dx
 10954 00003EAE 50                  <1> 	push	eax
 10955 00003EAF 66BAD403            <1> 	mov	dx, 3D4h ; VGAREG_VGA_CRTC_ADDRESS
 10956 00003EB3 88C4                <1>   	mov	ah, al
 10957 00003EB5 B012                <1> 	mov	al, 12h ; Vertical display end register
 10958 00003EB7 66EF                <1>   	out	dx, ax
 10959 00003EB9 58                  <1>   	pop	eax
 10960 00003EBA B007                <1>   	mov	al, 07h	; Overflow register
 10961 00003EBC EE                  <1>   	out	dx, al
 10962                              <1>   	;inc	dx
 10963                              <1>   	; 03/08/2022
 10964 00003EBD FEC2                <1> 	inc	dl
 10965 00003EBF EC                  <1> 	in	al, dx ; read overflow register
 10966 00003EC0 24BD                <1>   	and	al, 0BDh ; clear VDE 9th and 10th bits	
 10967 00003EC2 F6C401              <1>   	test	ah, 01h
 10968 00003EC5 7402                <1>   	jz	short bit8_clear
 10969 00003EC7 0C02                <1>   	or	al, 02h ; VDE 9th bit (bit 8) in bit 1
 10970                              <1> bit8_clear:
 10971 00003EC9 F6C402              <1>   	test	ah, 02h
 10972 00003ECC 7402                <1>   	jz	short bit9_clear
 10973 00003ECE 0C40                <1>   	or	al, 40h ; VDE 10th bit (bit 9) in bit 6
 10974                              <1> bit9_clear:
 10975 00003ED0 EE                  <1>   	out	dx, al
 10976                              <1> 
 10977                              <1>   	; other settings
 10978                              <1>  	;mov	dx, 3D4h ; VGAREG_VGA_CRTC_ADDRESS
 10979                              <1>   	; 03/08/2022
 10980 00003ED1 B2D4                <1> 	mov	dl, 0D4h
 10981 00003ED3 66B80900            <1> 	mov	ax, 0009h ; Maximum scan line register
 10982 00003ED7 66EF                <1>   	out	dx, ax	; Reset
 10983 00003ED9 B017                <1>   	mov	al, 17h ; Mode control register		
 10984 00003EDB EE                  <1>   	out	dx, al
 10985                              <1>  	;mov	dx, 3D5h ; VGAREG_VGA_CRTC_DATA
 10986 00003EDC FEC2                <1>   	inc	dl
 10987 00003EDE EC                  <1> 	in	al, dx	; Read mode control register
 10988 00003EDF 0C03                <1>   	or	al, 03h ; Set SRS and CMS bits
 10989 00003EE1 EE                  <1>   	out	dx, al 
 10990                              <1>   	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
 10991                              <1>   	; 03/08/2022
 10992 00003EE2 B2DA                <1> 	mov	dl, 0DAh
 10993 00003EE4 EC                  <1> 	in	al, dx	 ; clear flip-flop
 10994                              <1>   	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
 10995                              <1>   	; 03/08/2022
 10996 00003EE5 B2C0                <1> 	mov	dl, 0C0h
 10997 00003EE7 B010                <1> 	mov	al, 10h	; Mode control register
 10998 00003EE9 EE                  <1>   	out	dx, al
 10999                              <1> 	;mov	dx, 3C1h ; VGAREG_ACTL_READ_DATA
 11000 00003EEA FEC2                <1> 	inc	dl
 11001 00003EEC EC                  <1> 	in	al, dx
 11002 00003EED 0C01                <1> 	or	al, 01h ; select graphics mode
 11003                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
 11004 00003EEF FECA                <1> 	dec	dl
 11005 00003EF1 EE                  <1> 	out	dx, al ; Write to mode control register
 11006 00003EF2 B020                <1> 	mov	al, 20h ; Palette RAM <-> display memory
 11007 00003EF4 EE                  <1> 	out	dx, al ; Write to attribute addr register
 11008                              <1> 	;mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
 11009                              <1> 	; 03/08/2022
 11010 00003EF5 B2CE                <1> 	mov	dl, 0CEh 
 11011 00003EF7 66B80605            <1> 	mov	ax, 0506h ; Misc. register, graph, mm 1
 11012 00003EFB 66EF                <1> 	out	dx, ax
 11013                              <1> 	;mov	dx, 3C4h ; VGAREG_SEQU_ADDRESS
 11014                              <1> 	; 03/08/2022
 11015 00003EFD B2C4                <1> 	mov	dl, 0C4h 
 11016 00003EFF 66B8020F            <1> 	mov	ax, 0F02h ; Map mask register, all planes
 11017 00003F03 66EF                <1> 	out	dx, ax
 11018                              <1> 
 11019                              <1>   	; settings for >= 8bpp
 11020                              <1> 
 11021                              <1> 	;mov	dx, 1CEh ; VBE_DISPI_IOPORT_INDEX
 11022                              <1> 	;mov	ax, 03h ; VBE_DISPI_INDEX_BPP
 11023                              <1> 	;out	dx, ax
 11024                              <1> 	;;mov	dx, 1CFh ; VBE_DISPI_IOPORT_DATA
 11025                              <1> 	;inc	dl
 11026                              <1> 	;in	ax, dx
 11027                              <1> 	;cmp	al, 08h  ; < 8 bits per pixel
 11028                              <1> 	;jb	short vga_compat_end
 11029                              <1> 
 11030                              <1> 	;mov	dx, 3D4h ; VGAREG_VGA_CRTC_ADDRESS
 11031                              <1> 	; 03/08/2022
 11032 00003F05 B2D4                <1> 	mov	dl, 0D4h
 11033 00003F07 B014                <1> 	mov	al, 14h  ; Underline location register
 11034 00003F09 EE                  <1> 	out	dx, al
 11035                              <1> 	;mov	dx, 3D5h ; VGAREG_VGA_CRTC_DATA
 11036 00003F0A FEC2                <1> 	inc	dl
 11037 00003F0C EC                  <1> 	in	al, dx	
 11038 00003F0D 0C40                <1> 	or	al, 40h	 ; enable double word mode
 11039 00003F0F EE                  <1> 	out	dx, al
 11040                              <1> 	;mov	dx, 3DAh ; VGAREG_ACTL_RESET
 11041                              <1> 	; 03/08/2022
 11042 00003F10 B2DA                <1> 	mov	dl, 0DAh
 11043 00003F12 EC                  <1> 	in	al, dx	 ; clear flip-flop
 11044                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
 11045                              <1> 	; 03/08/2022
 11046 00003F13 B2C0                <1> 	mov	dl, 0C0h
 11047 00003F15 B010                <1> 	mov	al, 10h	 ; Mode control register
 11048 00003F17 EE                  <1> 	out	dx, al
 11049                              <1> 	;mov	dx, 3C1h ; VGAREG_ACTL_READ_DATA
 11050 00003F18 FEC2                <1> 	inc	dl
 11051 00003F1A EC                  <1> 	in	al, dx
 11052 00003F1B 0C40                <1> 	or	al, 40h  ; Pixel clock select is 1
 11053                              <1> 	;mov	dx, 3C0h ; VGAREG_ACTL_ADDRESS
 11054 00003F1D FECA                <1> 	dec	dl
 11055 00003F1F EE                  <1> 	out	dx, al	 ; update mode control reggister
 11056 00003F20 B020                <1> 	mov	al, 20h	 ; select display memory as PAS	
 11057 00003F22 EE                  <1> 	out	dx, al
 11058                              <1> 	;mov	dx, 3C4h ; VGAREG_SEQU_ADDRESS
 11059                              <1> 	; 03/08/2022
 11060 00003F23 B2C4                <1> 	mov	dl, 0C4h
 11061 00003F25 B004                <1> 	mov	al, 04h	; Memory mode register
 11062 00003F27 EE                  <1> 	out	dx, al
 11063                              <1> 	;mov	dx, 3C5h ; VGAREG_SEQU_DATA
 11064 00003F28 FEC2                <1> 	inc	dl
 11065 00003F2A EC                  <1> 	in	al, dx
 11066 00003F2B 0C08                <1> 	or	al, 08h	; enable chain four
 11067 00003F2D EE                  <1> 	out	dx, al
 11068                              <1> 	;mov	dx, 3CEh ; VGAREG_GRDC_ADDRESS
 11069                              <1> 	; 03/08/2022
 11070 00003F2E B2CE                <1> 	mov	dl, 0CEh
 11071 00003F30 B005                <1> 	mov	al, 05h	 ; Mode register	
 11072 00003F32 EE                  <1> 	out	dx, al
 11073                              <1> 	;mov	dx, 3CFh ; VGAREG_GRDC_DATA
 11074 00003F33 FEC2                <1> 	inc	dl
 11075 00003F35 EC                  <1> 	in	al, dx	
 11076 00003F36 249F                <1> 	and	al, 9Fh	 ; clear shift register 
 11077 00003F38 0C40                <1> 	or	al, 40h  ; set shift register to 2
 11078 00003F3A EE                  <1> 	out	dx, al
 11079                              <1> 
 11080                              <1> vga_compat_end:
 11081                              <1>   	;pop	edx
 11082                              <1>   	;pop	eax
 11083 00003F3B C3                  <1> 	retn
 11084                              <1> 
 11085                              <1> vga_set_virt_width:
 11086                              <1> 	; 03/08/2022
 11087                              <1> 	; 27/11/2020
 11088                              <1> 	; 25/11/2020
 11089                              <1> 	; (vbe.c, 02/01/2020, vruppert)
 11090                              <1> 	;
 11091                              <1> 	; Input:
 11092                              <1> 	;	AX = resolution (screen width)
 11093                              <1> 	;
 11094                              <1> 	; Modified registers: eax, edx
 11095                              <1> 
 11096                              <1>   	;;push	ebx
 11097                              <1>   	;push	edx
 11098                              <1> 	;push	eax
 11099                              <1>   	;mov	ebx, eax
 11100                              <1>   	;call	dispi_get_bpp ; bits per pixel
 11101                              <1> 	;cmp	al, 4
 11102                              <1> 	;ja	short set_width_svga  ; 8, 16, 24, 32 
 11103                              <1> 	;shr	bx, 1
 11104                              <1> ;set_width_svga:
 11105                              <1> 	;shr	bx, 3
 11106                              <1> 	;mov	eax, [esp]
 11107                              <1> 	;shr	ax, 3	; / 8, bytes per row
 11108                              <1> 	; 03/08/2022
 11109 00003F3C C1E803              <1> 	shr	eax, 3
 11110 00003F3F 66BAD403            <1> 	mov	dx, 3D4h ; VGAREG_VGA_CRTC_ADDRESS
 11111                              <1> 	;mov	ah, bl	; 
 11112 00003F43 88C4                <1> 	mov	ah, al	; width in bytes
 11113 00003F45 B013                <1> 	mov	al, 13h	; offset register
 11114 00003F47 66EF                <1> 	out	dx, ax	; index (3D4h) and data (3D5h)
 11115                              <1> 	;pop	eax
 11116                              <1> 	;pop  	edx
 11117                              <1> 	;;pop	ebx
 11118 00003F49 C3                  <1> 	retn
 11119                              <1> 
 11120                              <1> ; 24/11/2020
 11121                              <1> 
 11122                              <1> struc bmi ; BOCHS/PLEX86 MODE INFO structure/table 
 11123 00000000 ????                <1>  .mode:	  resw 1
 11124 00000002 ????                <1>  .width:  resw 1
 11125 00000004 ????                <1>  .height: resw 1
 11126 00000006 ????                <1>  .depth:  resw 1
 11127                              <1>  .size:	
 11128                              <1> endstruc
 11129                              <1> 
 11130                              <1> ; 24/11/2020
 11131                              <1> struc MODEINFO
 11132 00000000 ????                <1>  .mode:			resw 1  ; 1XXh
 11133 00000002 ????                <1>  .ModeAttributes:	resw 1
 11134 00000004 ??                  <1>  .WinAAttributes:	resb 1
 11135 00000005 ??                  <1>  .WinBAttributes:	resb 1	; = 0
 11136 00000006 ????                <1>  .WinGranularity:	resw 1
 11137 00000008 ????                <1>  .WinSize:		resw 1
 11138 0000000A ????                <1>  .WinASegment:		resw 1
 11139 0000000C ????                <1>  .WinBSegment:		resw 1	; = 0
 11140 0000000E ????????            <1>  .WinFuncPtr:		resd 1	; = 0
 11141 00000012 ????                <1>  .BytesPerScanLine:	resw 1
 11142 00000014 ????                <1>  .XResolution:		resw 1
 11143 00000016 ????                <1>  .YResolution:		resw 1
 11144 00000018 ??                  <1>  .XCharSize:		resb 1
 11145 00000019 ??                  <1>  .YCharSize:		resb 1
 11146 0000001A ??                  <1>  .NumberOfPlanes: 	resb 1
 11147 0000001B ??                  <1>  .BitsPerPixel:		resb 1
 11148 0000001C ??                  <1>  .NumberOfBanks:	resb 1
 11149 0000001D ??                  <1>  .MemoryModel:		resb 1
 11150 0000001E ??                  <1>  .BankSize:		resb 1	; = 0
 11151 0000001F ??                  <1>  .NumberOfImagePages: 	resb 1
 11152 00000020 ??                  <1>  .Reserved_page:	resb 1	; = 0
 11153 00000021 ??                  <1>  .RedMaskSize:		resb 1
 11154 00000022 ??                  <1>  .RedFieldPosition: 	resb 1
 11155 00000023 ??                  <1>  .GreenMaskSize:	resb 1
 11156 00000024 ??                  <1>  .GreenFieldPosition: 	resb 1
 11157 00000025 ??                  <1>  .BlueMaskSize:		resb 1
 11158 00000026 ??                  <1>  .BlueFieldPosition: 	resb 1
 11159 00000027 ??                  <1>  .RsvdMaskSize:		resb 1
 11160 00000028 ??                  <1>  .RsvdFieldPosition: 	resb 1
 11161 00000029 ??                  <1>  .DirectColorModeInfo: 	resb 1
 11162 0000002A ????????            <1>  .PhysBasePtr:		resd 1
 11163 0000002E ????????            <1>  .OffScreenMemOffset: 	resd 1	; = 0
 11164 00000032 ????                <1>  .OffScreenMemSize: 	resw 1	; = 0
 11165 00000034 ????                <1>  .LinBytesPerScanLine: 	resw 1
 11166 00000036 ??                  <1>  .BnkNumberOfPages: 	resb 1
 11167 00000037 ??                  <1>  .LinNumberOfPages: 	resb 1
 11168 00000038 ??                  <1>  .LinRedMaskSize:	resb 1
 11169 00000039 ??                  <1>  .LinRedFieldPosition1: resb 1
 11170 0000003A ??                  <1>  .LinGreenMaskSize1: 	resb 1
 11171 0000003B ??                  <1>  .LinGreenFieldPosition:resb 1
 11172 0000003C ??                  <1>  .LinBlueMaskSize: 	resb 1
 11173 0000003D ??                  <1>  .LinBlueFieldPosition:	resb 1
 11174 0000003E ??                  <1>  .LinRsvdMaskSize: 	resb 1
 11175 0000003F ??                  <1>  .LinRsvdFieldPosition:	resb 1
 11176 00000040 ????????            <1>  .MaxPixelClock:	resd 1	; = 0
 11177                              <1> .size:
 11178                              <1> endstruc
 11179                              <1> 
 11180                              <1> ; 10/12/2020
 11181                              <1> struc LFBINFO
 11182 00000000 ????                <1>  .mode:			resw 1  ; 1XXh
 11183 00000002 ????????            <1>  .LFB_addr:		resd 1
 11184 00000006 ????????            <1>  .LFB_size:		resd 1
 11185 0000000A ????                <1>  .X_res:		resw 1
 11186 0000000C ????                <1>  .Y_res:		resw 1
 11187 0000000E ??                  <1>  .bpp:			resb 1
 11188 0000000F ??                  <1>  .reserved:		resb 1
 11189                              <1> .size:	; 16 bytes
 11190                              <1> endstruc
 11191                              <1> 
 11192                              <1> set_mode_info_list:
 11193                              <1> 	; 14/12/2020
 11194                              <1> 	; 11/12/2020
 11195                              <1> 	; 24/11/2020
 11196                              <1> 	; (vbetables-gen.c)
 11197                              <1> 	; Input:
 11198                              <1> 	;	BX = VBE mode (including bochs special modes) 
 11199                              <1> 	; Output:
 11200                              <1> 	;	;;EAX = MODE_INFO_LIST address
 11201                              <1> 	;	EAX = 0 ; 11/12/2020
 11202                              <1> 	;	ESI = MODE_INFO_LIST address ; 11/12/2020
 11203                              <1> 	;	(if mode is not found, ESI = 0)
 11204                              <1> 	;
 11205                              <1> 	; Modified registers: eax, ebx, ecx, edx, esi, edi 
 11206                              <1> 
 11207 00003F4A BE[AA6A0000]        <1> 	mov	esi, b_vbe_modes ; bochs mode info base table
 11208 00003F4F BF[EE0F0300]        <1> 	mov	edi, MODE_INFO_LIST ; mode info list (4F01h)
 11209                              <1> sml_0:
 11210 00003F54 66AD                <1> 	lodsw	
 11211 00003F56 6639D8              <1> 	cmp	ax, bx ; is mode number same ?
 11212 00003F59 7410                <1> 	je	short sml_1 ; yes
 11213 00003F5B AD                  <1> 	lodsd
 11214 00003F5C 66AD                <1> 	lodsw	
 11215 00003F5E 81FE[6A6B0000]      <1> 	cmp	esi, end_of_b_vbe_modes
 11216 00003F64 72EE                <1> 	jb	short sml_0
 11217                              <1> 	; not found
 11218 00003F66 31C0                <1> 	xor	eax, eax ; 0
 11219                              <1> 	; 11/12/2020
 11220 00003F68 31F6                <1> 	xor	esi, esi
 11221 00003F6A C3                  <1> 	retn
 11222                              <1> sml_1:
 11223 00003F6B 66AB                <1> 	stosw	; mode
 11224 00003F6D AD                  <1> 	lodsd	; width, height
 11225                              <1> 	; 14/12/2020
 11226 00003F6E 89C1                <1> 	mov	ecx, eax
 11227 00003F70 50                  <1> 	push	eax ; ***
 11228 00003F71 29C0                <1> 	sub	eax, eax ; clear high word of eax
 11229 00003F73 66AD                <1> 	lodsw	; depth
 11230 00003F75 50                  <1> 	push	eax ; **
 11231                              <1> 
 11232                              <1> 	;add	al, 7 ; only for 15 bit colors (not used here)
 11233 00003F76 C0E803              <1> 	shr	al, 3 ; / 8
 11234                              <1> 	; 14/12/2020
 11235 00003F79 66F7E1              <1> 	mul	cx  ; pitch = width * ((depth+7)/8)
 11236                              <1> 		; ax = pitch
 11237 00003F7C 50                  <1> 	push	eax ; * ; high word of eax = 0
 11238 00003F7D C1E910              <1> 	shr	ecx, 16
 11239                              <1> 	;mul	cx
 11240                              <1> 	;mov	cx, ax
 11241 00003F80 31D2                <1> 	xor	edx, edx  ; clear high word of edx
 11242 00003F82 F7E1                <1> 	mul	ecx ; height * pitch
 11243 00003F84 89C1                <1> 	mov	ecx, eax
 11244 00003F86 B800000001          <1> 	mov	eax, VBE_DISPI_TOTAL_VIDEO_MEMORY_MB * 1024 * 1024
 11245 00003F8B F7F1                <1> 	div	ecx
 11246                              <1> 		; eax = pages = vram_size / (height*pitch)
 11247                              <1> 	
 11248                              <1> 	;mov	cx, ax
 11249 00003F8D 89C1                <1> 	mov	ecx, eax ; pages 
 11250                              <1> 		
 11251 00003F8F 66B89B00            <1> 	mov	ax, MODE_ATTRIBUTES
 11252 00003F93 66AB                <1> 	stosw	; ModeAttributes
 11253 00003F95 B007                <1> 	mov	al, WINA_ATTRIBUTES
 11254 00003F97 AA                  <1> 	stosb	; WinAAttributes
 11255 00003F98 30C0                <1> 	xor	al, al ; WinBAttributes = 0
 11256 00003F9A AA                  <1> 	stosb
 11257 00003F9B 66B84000            <1> 	mov	ax, VBE_DISPI_BANK_SIZE_KB
 11258 00003F9F 66AB                <1> 	stosw	; WinGranularity
 11259 00003FA1 66AB                <1> 	stosw	; WinSize
 11260 00003FA3 66B800A0            <1> 	mov	ax, VGAMEM_GRAPH
 11261 00003FA7 66AB                <1> 	stosw	; WinASegment
 11262 00003FA9 29C0                <1> 	sub	eax, eax
 11263 00003FAB 66AB                <1> 	stosw	; WinBSegment = 0
 11264 00003FAD AB                  <1> 	stosd	; WinFuncPtr = 0
 11265                              <1> 
 11266 00003FAE 58                  <1> 	pop	eax ; * ; pitch
 11267 00003FAF 89C3                <1> 	mov	ebx, eax  ; high word of ebx = 0 ; 14/12/2020
 11268 00003FB1 66AB                <1> 	stosw	; BytesPerScanLine
 11269                              <1> 
 11270 00003FB3 5A                  <1> 	pop	edx ; ** ; depth (bits per pixel)
 11271 00003FB4 58                  <1> 	pop	eax ; *** width, height
 11272                              <1> 
 11273                              <1>  	; // Mandatory information for VBE 1.2 and above
 11274                              <1> 
 11275 00003FB5 66AB                <1> 	stosw	; XResolution (width)
 11276 00003FB7 C1E810              <1> 	shr	eax, 16
 11277 00003FBA 50                  <1> 	push	eax ; **** height
 11278 00003FBB 66AB                <1> 	stosw	; YResolution (height)
 11279 00003FBD B008                <1> 	mov	al, 8
 11280 00003FBF AA                  <1>  	stosb	; XCharSize  ; char width
 11281 00003FC0 B010                <1> 	mov	al, 16
 11282 00003FC2 AA                  <1> 	stosb	; YCharSize  ; char height
 11283 00003FC3 B001                <1> 	mov	al, 1
 11284 00003FC5 AA                  <1> 	stosb	; NumberOfPlanes
 11285                              <1> 	;movzx	eax, dl
 11286 00003FC6 88D0                <1> 	mov	al, dl ; eax <= 32
 11287 00003FC8 AA                  <1> 	stosb	; BitsPerPixel
 11288                              <1> 	; Number of banks = (height * pitch + 65535) / 65536
 11289 00003FC9 58                  <1> 	pop	eax ; **** ; height
 11290                              <1> 	; 14/12/2020
 11291 00003FCA 52                  <1> 	push	edx ; ***** ; depth ; edx <= 32
 11292 00003FCB F7E3                <1> 	mul	ebx  ; pitch (ebx) * height (eax)
 11293                              <1> 	;mov	edx, [esp] ; *****
 11294                              <1> 	;mov	dl, [esp] ; *****
 11295 00003FCD 05FFFF0000          <1> 	add	eax, 65535
 11296 00003FD2 C1E810              <1> 	shr	eax, 16 ; / 65536 ; <= 127 ; 14/12/2020
 11297 00003FD5 AA                  <1> 	stosb	; NumberOfBanks
 11298                              <1> 	; 14/12/2020
 11299                              <1> 	;cmp	dl, 8 ; 8 bits per pixel
 11300 00003FD6 803C2408            <1> 	cmp	byte [esp], 8
 11301 00003FDA 7704                <1> 	ja	short sml_2
 11302 00003FDC B004                <1> 	mov	al, VBE_MEMORYMODEL_PACKED_PIXEL
 11303 00003FDE EB02                <1> 	jmp	short sml_3
 11304                              <1> sml_2:
 11305                              <1> 	; 16, 24, 32 bits per pixel
 11306 00003FE0 B006                <1> 	mov	al, VBE_MEMORYMODEL_DIRECT_COLOR
 11307                              <1> sml_3:
 11308 00003FE2 AA                  <1> 	stosb
 11309 00003FE3 30C0                <1> 	xor	al, al ; 0
 11310 00003FE5 AA                  <1> 	stosb	; BankSize = 0
 11311 00003FE6 49                  <1> 	dec	ecx ; pages - 1
 11312                              <1> 	; NumberOfImagePages = 262 for 320x200x8 mode
 11313                              <1> 	;;mov	ax, 255
 11314                              <1> 	; 14/12/2020
 11315                              <1> 	;mov	al, 255
 11316 00003FE7 FEC8                <1> 	dec	al ; 255
 11317 00003FE9 39C1                <1> 	cmp	ecx, eax ; ecx <= 261, eax = 255 
 11318                              <1> 	;cmp	cx, ax
 11319 00003FEB 7302                <1> 	jnb	short sml_4
 11320 00003FED 88C8                <1> 	mov	al, cl	 
 11321                              <1> sml_4:
 11322 00003FEF AA                  <1> 	stosb	; NumberOfImagePages (1 byte)
 11323 00003FF0 28C0                <1> 	sub	al, al
 11324 00003FF2 AA                  <1> 	stosb	; Reserved_page = 0
 11325 00003FF3 58                  <1> 	pop	eax ; ***** ; depth
 11326 00003FF4 88C1                <1> 	mov	cl, al
 11327                              <1> 	; eax < = 32
 11328 00003FF6 2C08                <1> 	sub	al, 8 ; 8->0, 16->8, 24->16, 32->24
 11329 00003FF8 BE[6A6B0000]        <1> 	mov	esi, direct_color_fields
 11330 00003FFD 01C6                <1> 	add	esi, eax
 11331 00003FFF 56                  <1> 	push	esi ; ******
 11332 00004000 AD                  <1> 	lodsd	; RedMaskSize (AL), RedFieldPosition (AH)
 11333                              <1> 	     	; GreenMaskSize (16), GreenFieldPosition (24)
 11334 00004001 AB                  <1> 	stosd
 11335 00004002 AD                  <1> 	lodsd	; BlueMaskSize (AL), BlueFieldPosition (AH)
 11336                              <1> 	     	; RsvdMaskSize (16), RsvdFieldPosition (24)
 11337 00004003 AB                  <1> 	stosd
 11338 00004004 5E                  <1> 	pop	esi ; ******
 11339                              <1> 
 11340 00004005 30C0                <1> 	xor	al, al ; 0
 11341 00004007 80F920              <1> 	cmp	cl, 32
 11342 0000400A 7202                <1> 	jb	short sml_5
 11343 0000400C B002                <1> 	mov	al, VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE
 11344                              <1> sml_5: 
 11345 0000400E AA                  <1> 	stosb	; DirectColorModeInfo
 11346                              <1> 
 11347                              <1> 	; // Mandatory information for VBE 2.0 and above
 11348                              <1> 
 11349 0000400F B8000000E0          <1> 	mov	eax, VBE_DISPI_LFB_PHYSICAL_ADDRESS
 11350 00004014 AB                  <1> 	stosd	; PhysBasePtr
 11351 00004015 29C0                <1> 	sub	eax, eax
 11352 00004017 AB                  <1> 	stosd	; OffScreenMemOffset = 0
 11353 00004018 66AB                <1> 	stosw	; OffScreenMemSize = 0
 11354                              <1> 
 11355                              <1> 	;// Mandatory information for VBE 3.0 and above
 11356                              <1> 
 11357                              <1> 	; ebx = pitch
 11358 0000401A 6689D8              <1> 	mov	ax, bx
 11359                              <1> 	;stosw
 11360                              <1> 
 11361                              <1> 	;xor	al, al
 11362                              <1>      	;stosb	; BnkNumberOfPages = 0
 11363                              <1>      	;stosb	; LinNumberOfPages = 0
 11364                              <1> 
 11365 0000401D AB                  <1> 	stosd	; pitch (word), 0 (byte), 0 (byte)  
 11366                              <1> 
 11367 0000401E AD                  <1> 	lodsd	; LinRedMaskSize (AL), LinRedFieldPosition (AH)
 11368                              <1> 	     	; LinGreenMaskSize (16), LinGreenFieldPosition (24)
 11369 0000401F AB                  <1> 	stosd
 11370 00004020 AD                  <1> 	lodsd	; LinBlueMaskSize (AL), LinBlueFieldPosition (AH)
 11371                              <1> 	     	; LinRsvdMaskSize (16), LinRsvdFieldPosition (24)
 11372 00004021 AB                  <1> 	stosd
 11373                              <1> 
 11374 00004022 29C0                <1> 	sub	eax, eax
 11375 00004024 AB                  <1> 	stosd	; MaxPixelClock = 0
 11376                              <1> 
 11377                              <1> 	;mov	eax, MODE_INFO_LIST
 11378                              <1> 	; 11/12/2020
 11379 00004025 BE[EE0F0300]        <1> 	mov	esi, MODE_INFO_LIST
 11380                              <1> 	
 11381 0000402A C3                  <1> 	retn	
 11382                              <1> 
 11383                              <1> ; end of set_mode_info_list ; edi = set_mode_info_list + 68
 11384                              <1> 
 11385                              <1> pci_get_lfb_addr:
 11386                              <1> 	; 11/12/2020
 11387                              <1> 	; Get linear frame buffer base from PCI
 11388                              <1> 	; (vgabios.c, 02/01/2020, vruppert)
 11389                              <1> 	;
 11390                              <1> 	; Input:
 11391                              <1> 	;	ax = PCI device vendor id
 11392                              <1> 	; Output:
 11393                              <1> 	;	ax  = LFB address (high 16 bit) (zf=0)
 11394                              <1> 	;	eax = 0 -> not found (error) (zf=1)
 11395                              <1> 	;
 11396                              <1> 	; Modified registers: eax
 11397                              <1> 
 11398 0000402B 53                  <1> 	push	ebx
 11399 0000402C 51                  <1> 	push	ecx
 11400 0000402D 52                  <1> 	push	edx
 11401                              <1> 	;
 11402 0000402E 89C3                <1> 	mov	ebx, eax
 11403 00004030 31C9                <1> 	xor	ecx, ecx
 11404 00004032 28D2                <1> 	sub	dl, dl	; mov dl, 0
 11405 00004034 E842000000          <1> 	call	pci_read_reg
 11406 00004039 6683F8FF            <1> 	cmp	ax, 0FFFFh
 11407 0000403D 7417                <1> 	je	short pci_get_lfb_addr_fail
 11408                              <1> pci_get_lfb_addr_next_dev:
 11409 0000403F 28D2                <1> 	sub	dl, dl ; mov dl, 0
 11410 00004041 E835000000          <1> 	call	pci_read_reg
 11411 00004046 6639D8              <1> 	cmp	ax, bx	; check vendor
 11412 00004049 740F                <1> 	je	short pci_get_lfb_addr_found
 11413 0000404B 6683C108            <1> 	add	cx, 08h
 11414 0000404F 6681F90002          <1> 	cmp	cx, 200h ; search bus 0 and 1
 11415 00004054 72E9                <1> 	jb	short pci_get_lfb_addr_next_dev
 11416                              <1> pci_get_lfb_addr_fail:
 11417 00004056 31C0                <1> 	xor	eax, eax ; no LFB
 11418                              <1> 	; zf = 1
 11419 00004058 EB1D                <1> 	jmp	short pci_get_lfb_addr_return
 11420                              <1> pci_get_lfb_addr_found:
 11421 0000405A B210                <1> 	mov	dl, 10h	; I/O space 0
 11422 0000405C E81A000000          <1> 	call	pci_read_reg
 11423 00004061 66A9F1FF            <1> 	test	ax, 0FFF1h
 11424 00004065 740D                <1> 	jz	short pci_get_lfb_addr_success
 11425 00004067 B214                <1> 	mov	dl, 14h ; I/O space 1
 11426 00004069 E80D000000          <1> 	call	pci_read_reg
 11427 0000406E 66A9F1FF            <1> 	test	ax, 0FFF1h
 11428 00004072 75E2                <1> 	jnz	short pci_get_lfb_addr_fail
 11429                              <1> pci_get_lfb_addr_success:
 11430 00004074 C1E810              <1> 	shr	eax, 16 ; LFB address (hw)
 11431                              <1> 	; zf = 0
 11432                              <1> pci_get_lfb_addr_return:
 11433 00004077 5A                  <1> 	pop	edx
 11434 00004078 59                  <1> 	pop	ecx
 11435 00004079 5B                  <1> 	pop	ebx
 11436 0000407A C3                  <1> 	retn
 11437                              <1> 
 11438                              <1> pci_read_reg:
 11439                              <1> 	; 11/12/2020
 11440                              <1> 	; Read PCI register
 11441                              <1> 	; (vgabios.c, 02/01/2020, vruppert)
 11442                              <1> 	;
 11443                              <1> 	; Input:
 11444                              <1> 	;	cx = device/function
 11445                              <1> 	;	dl = register
 11446                              <1> 	; Output:
 11447                              <1> 	;	eax = value
 11448                              <1> 	;
 11449                              <1> 	; Modified registers: eax, edx
 11450                              <1> 
 11451 0000407B B800008000          <1> 	mov	eax, 00800000h 
 11452 00004080 6689C8              <1> 	mov	ax, cx
 11453 00004083 C1E008              <1> 	shl	eax, 8
 11454 00004086 88D0                <1> 	mov	al, dl
 11455 00004088 66BAF80C            <1> 	mov	dx, 0CF8h
 11456 0000408C EF                  <1>  	out	dx, eax
 11457 0000408D 80C204              <1> 	add	dl, 4 ; mov dx, 0CFCh
 11458 00004090 ED                  <1> 	in	eax, dx
 11459 00004091 C3                  <1> 	retn
 11460                              <1> 
 11461                              <1> %endif
 11462                              <1> 
 11463                              <1> ; -----------
 11464                              <1> 
 11465                              <1> %if 0
 11466                              <1> 
 11467                              <1> mode_info_find_mode:
 11468                              <1> 	; 25/11/2020
 11469                              <1> 	; Input:
 11470                              <1> 	;	bx = VESA VBE2 video mode (+ bochs extensions)
 11471                              <1> 	; Output:
 11472                              <1> 	;	esi = mode info address (for BX input)
 11473                              <1> 	;	esi = 0 -> not found
 11474                              <1> 	;
 11475                              <1> 	; Modified registers: eax, esi
 11476                              <1> 
 11477                              <1> 	xor	eax, eax
 11478                              <1> 	mov	esi, MODE_INFO_LIST
 11479                              <1> mifm_1:
 11480                              <1> 	mov	ax, [esi]
 11481                              <1> 	cmp	ax, bx
 11482                              <1> 	je	short mifm_2
 11483                              <1> 	add	esi, MODEINFO.size ; add esi, 68
 11484                              <1> 	cmp	esi, VBE_VESA_MODE_END_OF_LIST
 11485                              <1> 	jb	short mifm_1
 11486                              <1> 	; not found
 11487                              <1> 	sub	esi, esi ; 0
 11488                              <1> mifm_2
 11489                              <1> 	retn
 11490                              <1> 
 11491                              <1> dispi_get_bpp:
 11492                              <1> 	; 28/11/2020
 11493                              <1> 	; Input:
 11494                              <1> 	;	none
 11495                              <1> 	; Output:
 11496                              <1> 	;	al = Bits per pixel
 11497                              <1> 	;	     (8,16,24,32)
 11498                              <1> 	;	ah = Bytes per pixel
 11499                              <1> 	;	     (1,2,3,4)	
 11500                              <1> 	;
 11501                              <1> 	; Modified registers: none
 11502                              <1> 
 11503                              <1> 	;push	edx
 11504                              <1> 	;mov	dx, 01CEh ; VBE_DISPI_IOPORT_INDEX
 11505                              <1> 	;mov	ax, 03h	  ; VBE_DISPI_INDEX_BPP
 11506                              <1> 	;out	dx, ax
 11507                              <1> 	;;mov	dx, 01CFh ; VBE_DISPI_IOPORT_DATA
 11508                              <1> 	;;mov	dl, 0CFh
 11509                              <1> 	;inc	dl
 11510                              <1> 	;in	ax, dx
 11511                              <1> 	;mov	ah, al
 11512                              <1> 	;shr	ah, 3 ; / 8
 11513                              <1> 	;;test	al, 7 ; 15 bit graphics mode
 11514                              <1>  	;;jz	short get_bpp_noinc
 11515                              <1> 	;;inc	ah
 11516                              <1> ;;get_bpp_noinc:
 11517                              <1> 	;pop	edx
 11518                              <1> 	;retn
 11519                              <1> 
 11520                              <1> 	; 28/11/2020
 11521                              <1> 	; Modified registers: edx
 11522                              <1> 	;push	edx
 11523                              <1> 	mov	dx, 03h ; VBE_DISPI_INDEX_BPP
 11524                              <1> 	call	dispi_get_parms
 11525                              <1> 	;pop	edx
 11526                              <1> 	;retn
 11527                              <1> 	mov	ah, al
 11528                              <1> 	shr	ah, 3 ; / 8
 11529                              <1> 	;test	al, 7 ; 15 bit graphips mode
 11530                              <1>  	;jz	short get_bpp_noinc
 11531                              <1> 	;inc	ah
 11532                              <1> ;get_bpp_noinc:
 11533                              <1> 	;pop	edx
 11534                              <1> 	retn
 11535                              <1> 
 11536                              <1> restore_vesa_video_state:
 11537                              <1> 	; 02/08/2022 (TRDOS 386 v2.0.5)
 11538                              <1> 	; 14/01/2021
 11539                              <1> 	; 06/12/2020
 11540                              <1> 	; Input:
 11541                              <1> 	;	[vbe3stbufsize] <= 32 ; <= 32*64 bytes
 11542                              <1> 	; Output:
 11543                              <1> 	;	AX = 004Fh (successed)
 11544                              <1> 	;
 11545                              <1> 	;	eax = 0 -> buffer size problem
 11546                              <1> 	;	eax > 0 and ax <> 004Fh -> failed
 11547                              <1> 	;
 11548                              <1> 	; Modified regs: eax, ebx, ecx, edx, esi, edi 
 11549                              <1> 
 11550                              <1> 	;movzx	ecx, word [vbe3stbufsize]  
 11551                              <1> 	;cmp	cx, 32 ; 32 * 64 bytes
 11552                              <1> 	;ja	short r_v_b_s_fail
 11553                              <1> 
 11554                              <1> 	movzx	ecx, byte [vbe3stbufsize]; <=32	
 11555                              <1> 	;shl	cx, 4 ; dword count for movsd
 11556                              <1> 	; 02/08/2022
 11557                              <1> 	shl	ecx, 4 ; <= 32*16 dwords (32*64 bytes)
 11558                              <1> 	mov	edi, VBE3SAVERESTOREBLOCK ; destination
 11559                              <1> 					; (vbe3 pmi buff)
 11560                              <1> 	mov	esi, VBE3VIDEOSTATE ; source (kernel buff)
 11561                              <1> 	rep	movsd
 11562                              <1> 
 11563                              <1> 	mov	ax, 4F04h
 11564                              <1> 	mov	dl, 02h ; restore
 11565                              <1> 	;mov	cx, 0Fh
 11566                              <1> 	mov	cl, 0Fh
 11567                              <1> 	xor 	ebx, ebx ; points to VBE3SAVERESTOREBLOCK
 11568                              <1> 	jmp	short int10h_32bit_pmi
 11569                              <1> 
 11570                              <1> ;s_v_b_s_fail:
 11571                              <1> ;r_v_b_s_fail:
 11572                              <1> ;	xor	eax, eax
 11573                              <1> ;	retn
 11574                              <1> 
 11575                              <1> save_vesa_video_state:
 11576                              <1> 	; 02/08/2022 (TRDOS 386 v2.0.5)
 11577                              <1> 	; 14/01/2021
 11578                              <1> 	; 06/12/2020
 11579                              <1> 	; Input:
 11580                              <1> 	;	[vbe3stbufsize] <= 32 ; <= 32*64 bytes
 11581                              <1> 	; Output:
 11582                              <1> 	;	AX = 004Fh (successed)
 11583                              <1> 	;
 11584                              <1> 	;	eax = 0 -> buffer size problem
 11585                              <1> 	;	eax > 0 and ax <> 004Fh -> failed
 11586                              <1> 	;
 11587                              <1> 	; Modified regs: eax, ebx, ecx, edx, esi, edi 
 11588                              <1> 
 11589                              <1> 	;cmp	word [vbe33stbufsize], 32  
 11590                              <1> 	;			; 32 * 64 bytes
 11591                              <1> 	;ja	short s_v_b_s_fail
 11592                              <1> 
 11593                              <1> 	mov	ax, 4F04h
 11594                              <1> 	mov	dl, 01h ; save
 11595                              <1> 	;mov	cx, 0Fh
 11596                              <1> 	mov	cl, 0Fh
 11597                              <1> 	xor 	ebx, ebx ; points to VBE3SAVERESTOREBLOCK
 11598                              <1> 
 11599                              <1> 	call	int10h_32bit_pmi
 11600                              <1> 
 11601                              <1> 	movzx	ecx, byte [vbe3stbufsize]; <=32	
 11602                              <1> 	;shl	cx, 4 ; dword count for movsd
 11603                              <1> 	; 02/08/2022
 11604                              <1> 	shl	ecx, 4 ; <= 32*16 dwords (32*64 bytes)
 11605                              <1> 	mov	esi, VBE3SAVERESTOREBLOCK ; destination
 11606                              <1> 					; (vbe3 pmi buff)
 11607                              <1> 	mov	edi, VBE3VIDEOSTATE ; source (kernel buff)
 11608                              <1> 	rep	movsd	
 11609                              <1> 	retn
 11610                              <1> 
 11611                              <1> dispi_set_bank_farcall:
 11612                              <1> 	; 03/08/2022
 11613                              <1> 	; 12/04/2021 (32 bit push/pop)
 11614                              <1> 	; 11/12/2020
 11615                              <1> 	; (This may be 'sysvideo' function, later)
 11616                              <1> 	;
 11617                              <1> 	; Input: 
 11618                              <1> 	;	bx = 0000h, set bank number
 11619                              <1> 	;	   = 0100h, get bank number
 11620                              <1> 	;	dx = bank number (if bx = 0)	
 11621                              <1> 	; Output:
 11622                              <1> 	;	dx = bank number
 11623                              <1> 		 	
 11624                              <1> 	cmp	bx, 0100h
 11625                              <1> 	je	short dispi_set_bank_farcall_get
 11626                              <1> 	or	bx, bx
 11627                              <1> 	;jnz	dispi_set_bank_farcall_error
 11628                              <1> 	; 03/08/2022
 11629                              <1> 	jz	short dsbfcall_1
 11630                              <1> 	jmp	dispi_set_bank_farcall_error
 11631                              <1> dsbfcall_1:
 11632                              <1> 	mov	ax, dx
 11633                              <1> 	;push	dx
 11634                              <1> 	;push	ax
 11635                              <1> 	; 12/04/2021
 11636                              <1> 	push	edx
 11637                              <1> 	push	eax
 11638                              <1> 	mov	ax, VBE_DISPI_INDEX_BANK
 11639                              <1> 	mov	dx, 1CEh ; VBE_DISPI_IOPORT_INDEX
 11640                              <1> 	out	dx, ax
 11641                              <1> 	;pop	ax
 11642                              <1> 	; 12/04/2021
 11643                              <1> 	pop	eax
 11644                              <1> 	;;mov	dx, VBE_DISPI_IOPORT_DATA
 11645                              <1> 	;mov	dl, 0CFh
 11646                              <1> 	inc	dl ; 1CFh = VBE_DISPI_IOPORT_DATA
 11647                              <1> 	out	dx, ax
 11648                              <1> 	in	ax, dx
 11649                              <1> 	;pop	dx
 11650                              <1> 	; 12/04/2021
 11651                              <1> 	pop	edx
 11652                              <1> 	cmp	dx, ax
 11653                              <1> 	jne	short dispi_set_bank_farcall_error
 11654                              <1> 	mov	ax, 004Fh
 11655                              <1> 	retn	; retf for real mode far call
 11656                              <1> dispi_set_bank_farcall_get:
 11657                              <1> 	mov	ax, VBE_DISPI_INDEX_BANK
 11658                              <1> 	; 03/08/2022
 11659                              <1> 	mov	dx, 1CEh ; VBE_DISPI_IOPORT_INDEX
 11660                              <1> 	out	dx, ax
 11661                              <1> 	;;mov	dx, VBE_DISPI_IOPORT_DATA
 11662                              <1> 	;mov	dl, 0CFh
 11663                              <1> 	; 03/08/2022
 11664                              <1> 	inc	dl ; 1CFh = VBE_DISPI_IOPORT_DATA
 11665                              <1> 	in	ax, dx
 11666                              <1> 	mov	dx, ax
 11667                              <1> 	retn	; retf for real mode far call
 11668                              <1> dispi_set_bank_farcall_error:
 11669                              <1> 	mov	ax, 014Fh
 11670                              <1> 	retn	; retf for real mode far call
 11671                              <1> 
 11672                              <1> %endif
 11673                              <1> 
 11674                              <1> ; % include 'vidata.s' ; VIDEO DATA
 11675                              <1> 
 11676                              <1> ; /// End Of VIDEO FUNCTIONS ///
  2871                                  
  2872                                  setup_rtc_int:
  2873                                  ; source: http://wiki.osdev.org/RTC
  2874 00004092 FA                      	cli		; disable interrupts
  2875                                  	; default int frequency is 1024 Hz (Lower 4 bits of register A is 0110b or 6)
  2876                                  	; in order to change this ...
  2877                                  	; frequency  = 32768 >> (rate-1) --> 32768 >> 5 = 1024
  2878                                  	; (rate must be above 2 and not over 15)
  2879                                  	; new rate = 15 --> 32768 >> (15-1) = 2 Hz
  2880 00004093 B08A                    	mov	al, 8Ah 
  2881 00004095 E670                    	out	70h, al ; set index to register A, disable NMI
  2882 00004097 90                      	nop
  2883 00004098 E471                    	in	al, 71h ; get initial value of register A
  2884 0000409A 88C4                    	mov 	ah, al
  2885 0000409C 80E4F0                  	and	ah, 0F0h
  2886 0000409F B08A                    	mov	al, 8Ah 
  2887 000040A1 E670                    	out	70h, al ; reset index to register A
  2888 000040A3 88E0                    	mov	al, ah
  2889 000040A5 0C0F                    	or	al, 0Fh	; new rate (0Fh -> 15)
  2890 000040A7 E671                    	out	71h, al ; write only our rate to A. Note, rate is the bottom 4 bits. 
  2891                                  	; enable RTC interrupt
  2892 000040A9 B08B                    	mov	al, 8Bh ;
  2893 000040AB E670                    	out	70h, al ; select register B and disable NMI
  2894 000040AD 90                      	nop
  2895 000040AE E471                    	in	al, 71h ; read the current value of register B
  2896 000040B0 88C4                    	mov	ah, al  ;
  2897 000040B2 B08B                    	mov 	al, 8Bh ;
  2898 000040B4 E670                    	out	70h, al ; set the index again (a read will reset the index to register B)	
  2899 000040B6 88E0                    	mov	al, ah  ;
  2900 000040B8 0C40                    	or	al, 40h ;
  2901 000040BA E671                    	out	71h, al ; write the previous value ORed with 0x40. This turns on bit 6 of register B
  2902 000040BC FB                      	sti
  2903 000040BD C3                      	retn
  2904                                  
  2905                                  ; Write memory information
  2906                                  ; 29/01/2016
  2907                                  ; 06/11/2014
  2908                                  ; 14/08/2015 
  2909                                  memory_info:	
  2910 000040BE A1[4C770100]            	mov	eax, [memory_size] ; in pages
  2911 000040C3 50                      	push	eax
  2912 000040C4 C1E00C                  	shl	eax, 12		   ; in bytes
  2913 000040C7 BB0A000000              	mov	ebx, 10
  2914 000040CC 89D9                    	mov	ecx, ebx	   ; 10
  2915 000040CE BE[A5390100]            	mov	esi, mem_total_b_str	
  2916 000040D3 E8D8000000              	call	bintdstr
  2917 000040D8 58                      	pop	eax
  2918 000040D9 B107                    	mov	cl, 7
  2919 000040DB BE[C9390100]            	mov	esi, mem_total_p_str
  2920 000040E0 E8CB000000              	call	bintdstr	
  2921                                  	; 14/08/2015
  2922 000040E5 E8E3000000              	call	calc_free_mem
  2923                                  	; edx = calculated free pages
  2924                                  	; ecx = 0
  2925 000040EA A1[50770100]            	mov 	eax, [free_pages]
  2926 000040EF 39D0                    	cmp	eax, edx ; calculated free mem value 
  2927                                  		; and initial free mem value are same or not?
  2928 000040F1 751D                    	jne 	short pmim ; print mem info with '?' if not
  2929 000040F3 52                      	push 	edx ; free memory in pages	
  2930                                  	;mov 	eax, edx
  2931 000040F4 C1E00C                  	shl	eax, 12 ; convert page count
  2932                                  			; to byte count
  2933 000040F7 B10A                    	mov	cl, 10
  2934 000040F9 BE[E9390100]            	mov	esi, free_mem_b_str
  2935 000040FE E8AD000000              	call	bintdstr
  2936 00004103 58                      	pop	eax
  2937 00004104 B107                    	mov	cl, 7
  2938 00004106 BE[0D3A0100]            	mov	esi, free_mem_p_str
  2939 0000410B E8A0000000              	call	bintdstr
  2940                                  pmim:
  2941 00004110 BE[93390100]            	mov	esi, msg_memory_info
  2942                                  	;
  2943 00004115 B407                    	mov	ah, 07h ; Black background, 
  2944                                  			; light gray forecolor
  2945                                  print_kmsg: ; 29/01/2016
  2946 00004117 8825[77770100]          	mov	[ccolor], ah
  2947                                  pkmsg_loop:
  2948 0000411D AC                      	lodsb
  2949 0000411E 08C0                    	or	al, al
  2950 00004120 7410                    	jz	short pkmsg_ok
  2951 00004122 56                      	push	esi
  2952                                  	; 13/05/2016
  2953 00004123 0FB61D[77770100]        	movzx	ebx, byte [ccolor]
  2954                                  			; Video page 0 (bh=0)
  2955 0000412A E842E1FFFF              	call	_write_tty
  2956 0000412F 5E                      	pop	esi
  2957 00004130 EBEB                    	jmp	short pkmsg_loop
  2958                                  pkmsg_ok:
  2959 00004132 C3                      	retn
  2960                                  
  2961                                  ; 19/12/2020
  2962                                  ; temporary
  2963                                  ; Write default liner frame buffer address
  2964                                  ;
  2965                                  default_lfb_info:	
  2966 00004133 66A1[F60E0000]          	mov	ax, [def_LFB_addr] ; high word
  2967                                  	; 24/11/2023 - temporary
  2968 00004139 6609C0                  	or	ax, ax
  2969 0000413C 74F4                    	jz	short pkmsg_ok
  2970 0000413E E829000000              	call	wordtohex
  2971 00004143 A3[653A0100]            	mov	dword [lfb_addr_str], eax
  2972 00004148 BE[4E3A0100]            	mov	esi, msg_lfb_addr
  2973 0000414D B40F                    	mov	ah, 0Fh ; Black background, 
  2974                                  			; white forecolor
  2975 0000414F EBC6                    	jmp	short print_kmsg
  2976                                  
  2977                                  ; Convert binary number to hexadecimal string
  2978                                  ; 10/05/2015  
  2979                                  ; dsectpm.s (28/02/2015)
  2980                                  ; Retro UNIX 386 v1 - Kernel v0.2.0.6  
  2981                                  ; 01/12/2014
  2982                                  ; 25/11/2014
  2983                                  ;
  2984                                  bytetohex:
  2985                                  	; INPUT ->
  2986                                  	; 	AL = byte (binary number)
  2987                                  	; OUTPUT ->
  2988                                  	;	AX = hexadecimal string
  2989                                  	;
  2990 00004151 53                      	push	ebx
  2991 00004152 31DB                    	xor	ebx, ebx
  2992 00004154 88C3                    	mov	bl, al
  2993 00004156 C0EB04                  	shr	bl, 4
  2994 00004159 8A9B[9F410000]          	mov	bl, [ebx+hexchrs] 	 	
  2995 0000415F 86D8                    	xchg	bl, al
  2996 00004161 80E30F                  	and	bl, 0Fh
  2997 00004164 8AA3[9F410000]          	mov	ah, [ebx+hexchrs] 
  2998 0000416A 5B                      	pop	ebx	
  2999 0000416B C3                      	retn
  3000                                  
  3001                                  wordtohex:
  3002                                  	; INPUT ->
  3003                                  	; 	AX = word (binary number)
  3004                                  	; OUTPUT ->
  3005                                  	;	EAX = hexadecimal string
  3006                                  	;
  3007 0000416C 53                      	push	ebx
  3008 0000416D 31DB                    	xor	ebx, ebx
  3009 0000416F 86E0                    	xchg	ah, al
  3010 00004171 6650                    	push	ax ; * save ax
  3011 00004173 88E3                    	mov	bl, ah
  3012 00004175 C0EB04                  	shr	bl, 4
  3013 00004178 8A83[9F410000]          	mov	al, [ebx+hexchrs]
  3014 0000417E 88E3                    	mov	bl, ah
  3015 00004180 80E30F                  	and	bl, 0Fh
  3016 00004183 8AA3[9F410000]          	mov	ah, [ebx+hexchrs]
  3017 00004189 C1E010                  	shl	eax, 16 ; ax -> hw of eax
  3018 0000418C 6658                    	pop	ax ; * restore ax 
  3019 0000418E 5B                      	pop	ebx
  3020 0000418F EBC0                    	jmp	short bytetohex
  3021                                  	;mov	bl, al
  3022                                  	;shr	bl, 4
  3023                                  	;mov	bl, [ebx+hexchrs]
  3024                                  	;xchg	bl, al	 	
  3025                                  	;and	bl, 0Fh
  3026                                  	;mov	ah, [ebx+hexchrs] 
  3027                                  	;pop	ebx	
  3028                                  	;retn
  3029                                  
  3030                                  dwordtohex:
  3031                                  	; INPUT ->
  3032                                  	; 	EAX = dword (binary number)
  3033                                  	; OUTPUT ->
  3034                                  	;	EDX:EAX = hexadecimal string
  3035                                  	;
  3036 00004191 50                      	push	eax
  3037 00004192 C1E810                  	shr	eax, 16
  3038 00004195 E8D2FFFFFF              	call	wordtohex
  3039 0000419A 89C2                    	mov	edx, eax
  3040 0000419C 58                      	pop	eax
  3041                                  	;call	wordtohex
  3042                                  	;retn
  3043                                  	; 18/04/2021
  3044 0000419D EBCD                    	jmp	short wordtohex
  3045                                  
  3046                                  ; 10/05/2015
  3047                                  hex_digits:
  3048                                  hexchrs:
  3049 0000419F 303132333435363738-     	db '0123456789ABCDEF'
  3049 000041A8 39414243444546     
  3050                                  ; 19/01/2021 - VESA EDID ready flag (4Fh)
  3051 000041AF 00                      edid:	db 0
  3052                                  
  3053                                  ; Convert binary number to decimal/numeric string
  3054                                  ; 06/11/2014
  3055                                  ; Temporary Code
  3056                                  ;
  3057                                  
  3058                                  bintdstr:
  3059                                  	; EAX = binary number
  3060                                  	; ESI = decimal/numeric string address
  3061                                  	; EBX = divisor (10)
  3062                                  	; ECX = string length (<=10)
  3063 000041B0 01CE                    	add	esi, ecx
  3064                                  btdstr0:
  3065 000041B2 4E                      	dec	esi
  3066 000041B3 31D2                    	xor	edx, edx
  3067 000041B5 F7F3                    	div	ebx
  3068 000041B7 80C230                  	add	dl, 30h
  3069 000041BA 8816                    	mov	[esi], dl
  3070 000041BC FEC9                    	dec	cl
  3071 000041BE 740C                    	jz	short btdstr2 ; 08/09/2016
  3072 000041C0 09C0                    	or	eax, eax
  3073 000041C2 75EE                    	jnz	short btdstr0
  3074                                  btdstr1:
  3075 000041C4 4E                      	dec	esi
  3076 000041C5 C60620                          mov     byte [esi], 20h ; blank space
  3077 000041C8 FEC9                    	dec	cl
  3078 000041CA 75F8                    	jnz	short btdstr1
  3079                                  btdstr2:
  3080 000041CC C3                      	retn
  3081                                  
  3082                                  ; Calculate free memory pages on M.A.T.
  3083                                  ; 06/11/2014
  3084                                  ; Temporary Code
  3085                                  ;
  3086                                  
  3087                                  calc_free_mem:
  3088 000041CD 31D2                    	xor	edx, edx
  3089                                  	;xor	ecx, ecx
  3090 000041CF 668B0D[60770100]        	mov	cx, [mat_size] ; in pages
  3091 000041D6 C1E10A                  	shl	ecx, 10	; 1024 dwords per page
  3092 000041D9 BE00001000              	mov	esi, MEM_ALLOC_TBL
  3093                                  cfm0:
  3094 000041DE AD                      	lodsd
  3095 000041DF 51                      	push	ecx
  3096 000041E0 B920000000              	mov	ecx, 32
  3097                                  cfm1:
  3098 000041E5 D1E8                    	shr	eax, 1
  3099 000041E7 7301                    	jnc	short cfm2
  3100 000041E9 42                      	inc	edx
  3101                                  cfm2:
  3102 000041EA E2F9                    	loop	cfm1
  3103 000041EC 59                      	pop	ecx
  3104 000041ED E2EF                    	loop	cfm0
  3105 000041EF C3                      	retn
  3106                                  
  3107                                  %include 'diskio.s'  ; 07/03/2015
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel) - v2.0.5 - diskio.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 11/08/2022 (Previous: 18/04/2021 - Kernel v2.0.4)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 24/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Turkish Rational DOS
    11                              <1> ; Operating System Project v2.0 by ERDOGAN TAN (Beginning: 04/01/2016)
    12                              <1> ;
    13                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    14                              <1> ; diskio.inc (22/08/2015)
    15                              <1> ;
    16                              <1> ; Derived from 'IBM PC-XT-286' BIOS source code (1986) 
    17                              <1> ; ****************************************************************************
    18                              <1> ; Ref: Retro UNIX 386 v1.1 (Kernel v0.2.1.5) 'diskio' modification: 12/07/2022
    19                              <1> 
    20                              <1> ; Retro UNIX 386 v1 Kernel - DISKIO.INC
    21                              <1> ; Last Modification: 22/08/2015
    22                              <1> ; 	(Initialized Disk Parameters Data is in 'DISKDATA.INC') 
    23                              <1> ; 	(Uninitialized Disk Parameters Data is in 'DISKBSS.INC') 
    24                              <1> 
    25                              <1> ; DISK I/O SYSTEM - Erdogan Tan (Retro UNIX 386 v1 project)
    26                              <1> 
    27                              <1> ; ///////// DISK I/O SYSTEM ///////////////
    28                              <1> 
    29                              <1> ; 11/04/2021
    30                              <1> ;; 06/02/2015
    31                              <1> ;diskette_io:
    32                              <1> 	;clc ; 20/07/2020
    33                              <1> 	;pushfd
    34                              <1> 	;push 	cs
    35                              <1> 	;;call 	DISKETTE_IO_1
    36                              <1> 	;;retn
    37                              <1> 	
    38                              <1> ;;;;;; DISKETTE I/O ;;;;;;;;;;;;;;;;;;;; 06/02/2015 ;;;
    39                              <1> ;//////////////////////////////////////////////////////
    40                              <1> 
    41                              <1> ; DISKETTE I/O - Erdogan Tan (Retro UNIX 386 v1 project)
    42                              <1> ; 20/02/2015
    43                              <1> ; 06/02/2015 (unix386.s)
    44                              <1> ; 16/12/2014 - 02/01/2015 (dsectrm2.s)
    45                              <1> ;
    46                              <1> ; Code (DELAY) modifications - AWARD BIOS 1999 (ADISK.EQU, COMMON.MAC)
    47                              <1> ;
    48                              <1> ; ADISK.EQU
    49                              <1> 
    50                              <1> ;----- Wait control constants 
    51                              <1> 
    52                              <1> ;amount of time to wait while RESET is active.
    53                              <1> 
    54                              <1> WAITCPU_RESET_ON	EQU	21		;Reset on must last at least 14us
    55                              <1> 						;at 250 KBS xfer rate.
    56                              <1> 						;see INTEL MCS, 1985, pg. 5-456
    57                              <1> 
    58                              <1> WAITCPU_FOR_STATUS	EQU	100		;allow 30 microseconds for
    59                              <1> 						;status register to become valid
    60                              <1> 						;before re-reading.
    61                              <1> 
    62                              <1> ;After sending a byte to NEC, status register may remain
    63                              <1> ;incorrectly set for 24 us.
    64                              <1> 
    65                              <1> WAITCPU_RQM_LOW		EQU	24		;number of loops to check for
    66                              <1> 						;RQM low.
    67                              <1> 
    68                              <1> ; COMMON.MAC
    69                              <1> ;
    70                              <1> ;	Timing macros
    71                              <1> ;
    72                              <1> 
    73                              <1> %macro 		SIODELAY 0 			; SHORT IODELAY
    74                              <1> 		jmp short $+2
    75                              <1> %endmacro		
    76                              <1> 
    77                              <1> %macro		IODELAY  0			; NORMAL IODELAY
    78                              <1> 		jmp short $+2
    79                              <1> 		jmp short $+2
    80                              <1> %endmacro
    81                              <1> 
    82                              <1> %macro		NEWIODELAY 0
    83                              <1> 		out 0EBh, al
    84                              <1> %endmacro 
    85                              <1> 
    86                              <1> ; (According to) AWARD BIOS 1999 - ATORGS.ASM (dw -> equ, db -> equ)
    87                              <1> ;;; WAIT_FOR_MEM
    88                              <1> ;WAIT_FDU_INT_LO	equ	017798		; 2.5 secs in 30 micro units.
    89                              <1> ;WAIT_FDU_INT_HI	equ	1
    90                              <1> WAIT_FDU_INT_LH		equ	83334		; 27/02/2015 (2.5 seconds waiting)
    91                              <1> ;;; WAIT_FOR_PORT
    92                              <1> ;WAIT_FDU_SEND_LO	equ	16667		; .5 secons in 30 us units.
    93                              <1> ;WAIT_FDU_SEND_HI	equ	0
    94                              <1> WAIT_FDU_SEND_LH	equ 	16667		; 27/02/2015	
    95                              <1> ;Time to wait while waiting for each byte of NEC results = .5
    96                              <1> ;seconds.  .5 seconds = 500,000 micros.  500,000/30 = 16,667.
    97                              <1> ;WAIT_FDU_RESULTS_LO	equ	16667		; .5 seconds in 30 micro units.
    98                              <1> ;WAIT_FDU_RESULTS_HI	equ	0
    99                              <1> WAIT_FDU_RESULTS_LH	equ	16667  ; 27/02/2015
   100                              <1> ;;; WAIT_REFRESH
   101                              <1> ;amount of time to wait for head settle, per unit in parameter
   102                              <1> ;table = 1 ms.
   103                              <1> WAIT_FDU_HEAD_SETTLE	equ	33		; 1 ms in 30 micro units.
   104                              <1> 
   105                              <1> 
   106                              <1> ; //////////////// DISKETTE I/O ////////////////
   107                              <1> 
   108                              <1> ; 11/12/2014 (copy from IBM PC-XT Model 286 BIOS - POSTEQU.INC)
   109                              <1> 
   110                              <1> ;----------------------------------------
   111                              <1> ;	EQUATES USED BY POST AND BIOS	:
   112                              <1> ;----------------------------------------
   113                              <1> 
   114                              <1> ;--------- 8042 KEYBOARD INTERFACE AND DIAGNOSTIC CONTROL REGISTERS ------------
   115                              <1> ;PORT_A		EQU	060H		; 8042 KEYBOARD SCAN CODE/CONTROL PORT
   116                              <1> ;PORT_B		EQU	061H		; PORT B READ/WRITE DIAGNOSTIC REGISTER
   117                              <1> ;REFRESH_BIT	EQU	00010000B	; REFRESH TEST BIT
   118                              <1> 
   119                              <1> ;----------------------------------------
   120                              <1> ;	CMOS EQUATES FOR THIS SYSTEM	:
   121                              <1> ;-------------------------------------------------------------------------------
   122                              <1> ;CMOS_PORT	EQU	070H		; I/O ADDRESS OF CMOS ADDRESS PORT
   123                              <1> ;CMOS_DATA	EQU	071H		; I/O ADDRESS OF CMOS DATA PORT
   124                              <1> ;NMI		EQU	10000000B	; DISABLE NMI INTERRUPTS MASK -
   125                              <1> 					;  HIGH BIT OF CMOS LOCATION ADDRESS
   126                              <1> 
   127                              <1> ;---------- CMOS TABLE LOCATION ADDRESS'S ## -----------------------------------
   128                              <1> CMOS_DISKETTE	EQU	010H		; DISKETTE DRIVE TYPE BYTE	      ;
   129                              <1> ;		EQU	011H		; - RESERVED			      ;C
   130                              <1> CMOS_DISK	EQU	012H		; FIXED DISK TYPE BYTE		      ;H
   131                              <1> ;		EQU	013H		; - RESERVED			      ;E
   132                              <1> CMOS_EQUIP	EQU	014H		; EQUIPMENT WORD LOW BYTE	      ;C
   133                              <1> 
   134                              <1> ;---------- DISKETTE EQUATES ---------------------------------------------------
   135                              <1> INT_FLAG	EQU	10000000B	; INTERRUPT OCCURRENCE FLAG
   136                              <1> DSK_CHG 	EQU	10000000B	; DISKETTE CHANGE FLAG MASK BIT
   137                              <1> DETERMINED	EQU	00010000B	; SET STATE DETERMINED IN STATE BITS
   138                              <1> HOME		EQU	00010000B	; TRACK 0 MASK
   139                              <1> SENSE_DRV_ST	EQU	00000100B	; SENSE DRIVE STATUS COMMAND
   140                              <1> TRK_SLAP	EQU	030H		; CRASH STOP (48 TPI DRIVES)
   141                              <1> QUIET_SEEK	EQU	00AH		; SEEK TO TRACK 10
   142                              <1> ;MAX_DRV 	EQU	2		; MAX NUMBER OF DRIVES
   143                              <1> HD12_SETTLE	EQU	15		; 1.2 M HEAD SETTLE TIME
   144                              <1> HD320_SETTLE	EQU	20		; 320 K HEAD SETTLE TIME
   145                              <1> MOTOR_WAIT	EQU	37		; 2 SECONDS OF COUNTS FOR MOTOR TURN OFF
   146                              <1> 
   147                              <1> ;---------- DISKETTE ERRORS ----------------------------------------------------
   148                              <1> ;TIME_OUT	EQU	080H		; ATTACHMENT FAILED TO RESPOND
   149                              <1> ;BAD_SEEK	EQU	040H		; SEEK OPERATION FAILED
   150                              <1> BAD_NEC 	EQU	020H		; DISKETTE CONTROLLER HAS FAILED
   151                              <1> BAD_CRC 	EQU	010H		; BAD CRC ON DISKETTE READ
   152                              <1> MED_NOT_FND	EQU	00CH		; MEDIA TYPE NOT FOUND
   153                              <1> DMA_BOUNDARY	EQU	009H		; ATTEMPT TO DMA ACROSS 64K BOUNDARY
   154                              <1> BAD_DMA 	EQU	008H		; DMA OVERRUN ON OPERATION
   155                              <1> MEDIA_CHANGE	EQU	006H		; MEDIA REMOVED ON DUAL ATTACH CARD
   156                              <1> RECORD_NOT_FND	EQU	004H		; REQUESTED SECTOR NOT FOUND
   157                              <1> WRITE_PROTECT	EQU	003H		; WRITE ATTEMPTED ON WRITE PROTECT DISK
   158                              <1> BAD_ADDR_MARK	EQU	002H		; ADDRESS MARK NOT FOUND
   159                              <1> BAD_CMD 	EQU	001H		; BAD COMMAND PASSED TO DISKETTE I/O
   160                              <1> 
   161                              <1> ;---------- DISK CHANGE LINE EQUATES -------------------------------------------
   162                              <1> NOCHGLN 	EQU	001H		; NO DISK CHANGE LINE AVAILABLE
   163                              <1> CHGLN		EQU	002H		; DISK CHANGE LINE AVAILABLE
   164                              <1> 
   165                              <1> ;---------- MEDIA/DRIVE STATE INDICATORS ---------------------------------------
   166                              <1> TRK_CAPA	EQU	00000001B	; 80 TRACK CAPABILITY
   167                              <1> FMT_CAPA	EQU	00000010B	; MULTIPLE FORMAT CAPABILITY (1.2M)
   168                              <1> DRV_DET 	EQU	00000100B	; DRIVE DETERMINED
   169                              <1> MED_DET 	EQU	00010000B	; MEDIA DETERMINED BIT
   170                              <1> DBL_STEP	EQU	00100000B	; DOUBLE STEP BIT
   171                              <1> RATE_MSK	EQU	11000000B	; MASK FOR CLEARING ALL BUT RATE
   172                              <1> RATE_500	EQU	00000000B	; 500 KBS DATA RATE
   173                              <1> RATE_300	EQU	01000000B	; 300 KBS DATA RATE
   174                              <1> RATE_250	EQU	10000000B	; 250 KBS DATA RATE
   175                              <1> STRT_MSK	EQU	00001100B	; OPERATION START RATE MASK
   176                              <1> SEND_MSK	EQU	11000000B	; MASK FOR SEND RATE BITS
   177                              <1> 
   178                              <1> ;---------- MEDIA/DRIVE STATE INDICATORS COMPATIBILITY -------------------------
   179                              <1> M3D3U		EQU	00000000B	; 360 MEDIA/DRIVE NOT ESTABLISHED
   180                              <1> M3D1U		EQU	00000001B	; 360 MEDIA,1.2DRIVE NOT ESTABLISHED
   181                              <1> M1D1U		EQU	00000010B	; 1.2 MEDIA/DRIVE NOT ESTABLISHED
   182                              <1> MED_UNK 	EQU	00000111B	; NONE OF THE ABOVE
   183                              <1> 
   184                              <1> ;---------- INTERRUPT EQUATES --------------------------------------------------
   185                              <1> ;EOI		EQU	020H		; END OF INTERRUPT COMMAND TO 8259
   186                              <1> ;INTA00		EQU	020H		; 8259 PORT
   187                              <1> INTA01		EQU	021H		; 8259 PORT
   188                              <1> INTB00		EQU	0A0H		; 2ND 8259
   189                              <1> INTB01		EQU	0A1H		;
   190                              <1> 
   191                              <1> ;-------------------------------------------------------------------------------
   192                              <1> DMA08		EQU	008H		; DMA STATUS REGISTER PORT ADDRESS
   193                              <1> DMA		EQU	000H		; DMA CH.0 ADDRESS REGISTER PORT ADDRESS
   194                              <1> DMA18		EQU	0D0H		; 2ND DMA STATUS PORT ADDRESS
   195                              <1> DMA1		EQU	0C0H		; 2ND DMA CH.0 ADDRESS REGISTER ADDRESS
   196                              <1> ;-------------------------------------------------------------------------------
   197                              <1> ;TIMER		EQU	040H		; 8254 TIMER - BASE ADDRESS
   198                              <1> 
   199                              <1> ;-------------------------------------------------------------------------------
   200                              <1> DMA_PAGE	EQU	081H		; START OF DMA PAGE REGISTERS
   201                              <1> 
   202                              <1> ; 06/02/2015 (unix386.s, protected mode modifications)
   203                              <1> ; (unix386.s <-- dsectrm2.s)
   204                              <1> ; 11/12/2014 (copy from IBM PC-XT Model 286 BIOS - DSEG.INC)
   205                              <1> 
   206                              <1> ; 27/05/2016 - TRDOS 386 (TRDOS v2.0)
   207                              <1> ; 10/12/2014
   208                              <1> ;
   209                              <1> ;int40h:
   210                              <1> ;	pushf
   211                              <1> ;	push 	cs
   212                              <1> ;	;cli
   213                              <1> ;	call 	DISKETTE_IO_1
   214                              <1> ;	retn
   215                              <1> 
   216                              <1> ; DSKETTE ----- 04/21/86 DISKETTE BIOS
   217                              <1> ; (IBM PC XT Model 286 System BIOS Source Code, 04-21-86)
   218                              <1> ;
   219                              <1> 
   220                              <1> ;-- INT13H ---------------------------------------------------------------------
   221                              <1> ; DISKETTE I/O
   222                              <1> ;	THIS INTERFACE PROVIDES ACCESS TO THE 5 1/4 INCH 360 KB,
   223                              <1> ;	1.2 MB, 720 KB AND 1.44 MB DISKETTE DRIVES.
   224                              <1> ; INPUT
   225                              <1> ;	(AH) =  00H RESET DISKETTE SYSTEM
   226                              <1> ;		HARD RESET TO NEC, PREPARE COMMAND, RECALIBRATE REQUIRED
   227                              <1> ;		ON ALL DRIVES
   228                              <1> ;------------------------------------------------------------------------------- 
   229                              <1> ;	(AH)= 01H  READ THE STATUS OF THE SYSTEM INTO (AH)
   230                              <1> ;		@DISKETTE_STATUS FROM LAST OPERATION IS USED
   231                              <1> ;-------------------------------------------------------------------------------
   232                              <1> ;	REGISTERS FOR READ/WRITE/VERIFY/FORMAT
   233                              <1> ;	(DL) - DRIVE NUMBER (0-1 ALLOWED, VALUE CHECKED)
   234                              <1> ;	(DH) - HEAD NUMBER (0-1 ALLOWED, NOT VALUE CHECKED)
   235                              <1> ;	(CH) - TRACK NUMBER (NOT VALUE CHECKED)
   236                              <1> ;		MEDIA	DRIVE	TRACK NUMBER
   237                              <1> ;		320/360	320/360	    0-39
   238                              <1> ;		320/360	1.2M	    0-39
   239                              <1> ;		1.2M	1.2M	    0-79
   240                              <1> ;		720K	720K	    0-79
   241                              <1> ;		1.44M	1.44M	    0-79	
   242                              <1> ;	(CL) - 	SECTOR NUMBER (NOT VALUE CHECKED, NOT USED FOR FORMAT)
   243                              <1> ;		MEDIA	DRIVE	SECTOR NUMBER
   244                              <1> ;		320/360	320/360	     1-8/9
   245                              <1> ;		320/360	1.2M	     1-8/9
   246                              <1> ;		1.2M	1.2M	     1-15
   247                              <1> ;		720K	720K	     1-9
   248                              <1> ;		1.44M	1.44M	     1-18		
   249                              <1> ;	(AL)	NUMBER OF SECTORS (NOT VALUE CHECKED)
   250                              <1> ;		MEDIA	DRIVE	MAX NUMBER OF SECTORS
   251                              <1> ;		320/360	320/360	     8/9
   252                              <1> ;		320/360	1.2M	     8/9
   253                              <1> ;		1.2M	1.2M	     15
   254                              <1> ;		720K	720K	      9
   255                              <1> ;		1.44M	1.44M	     18
   256                              <1> ;
   257                              <1> ;	(ES:BX) - ADDRESS OF BUFFER (NOT REQUIRED FOR VERIFY)
   258                              <1> ;
   259                              <1> ;-------------------------------------------------------------------------------
   260                              <1> ;	(AH)= 02H  READ THE DESIRED SECTORS INTO MEMORY
   261                              <1> ;-------------------------------------------------------------------------------
   262                              <1> ;	(AH)= 03H  WRITE THE DESIRED SECTORS FROM MEMORY
   263                              <1> ;-------------------------------------------------------------------------------
   264                              <1> ;	(AH)= 04H  VERIFY THE DESIRED SECTORS
   265                              <1> ;-------------------------------------------------------------------------------
   266                              <1> ;	(AH)= 05H  FORMAT THE DESIRED TRACK
   267                              <1> ;		(ES,BX) MUST POINT TO THE COLLECTION OF DESIRED ADDRESS FIELDS
   268                              <1> ;		FOR THE	TRACK. EACH FIELD IS COMPOSED OF 4 BYTES, (C,H,R,N),
   269                              <1> ;		WHERE C = TRACK NUMBER, H=HEAD NUMBER, R = SECTOR NUMBER, 
   270                              <1> ;		N= NUMBER OF BYTES PER SECTOR (00=128,01=256,02=512,03=1024),
   271                              <1> ;		THERE MUST BE ONE ENTRY FOR EVERY SECTOR ON THE TRACK.
   272                              <1> ;		THIS INFORMATION IS USED TO FIND THE REQUESTED SECTOR DURING 
   273                              <1> ;		READ/WRITE ACCESS.
   274                              <1> ;		PRIOR TO FORMATTING A DISKETTE, IF THERE EXISTS MORE THAN
   275                              <1> ;		ONE SUPPORTED MEDIA FORMAT TYPE WITHIN THE DRIVE IN QUESTION,
   276                              <1> ;		THEN "SET DASD TYPE" (INT 13H, AH = 17H) OR 'SET MEDIA TYPE'
   277                              <1> ;		(INT 13H, AH =  18H) MUST BE CALLED TO SET THE DISKETTE TYPE
   278                              <1> ;		THAT IS TO BE FORMATTED. IF "SET DASD TYPE" OR "SET MEDIA TYPE"
   279                              <1> ;		IS NOT CALLED, THE FORMAT ROUTINE WILL ASSUME THE 
   280                              <1> ;		MEDIA FORMAT TO BE THE MAXIMUM CAPACITY OF THE DRIVE.
   281                              <1> ;
   282                              <1> ;		THESE PARAMETERS OF DISK BASE MUST BE CHANGED IN ORDER TO
   283                              <1> ;		FORMAT THE FOLLOWING MEDIAS:
   284                              <1> ;		---------------------------------------------
   285                              <1> ;		: MEDIA  :     DRIVE      : PARM 1 : PARM 2 :
   286                              <1> ;		---------------------------------------------
   287                              <1> ;		: 320K	 : 320K/360K/1.2M :  50H   :   8    :
   288                              <1> ;		: 360K	 : 320K/360K/1.2M :  50H   :   9    :
   289                              <1> ;		: 1.2M	 : 1.2M           :  54H   :  15    :
   290                              <1> ;		: 720K	 : 720K/1.44M     :  50H   :   9    :
   291                              <1> ;		: 1.44M	 : 1.44M          :  6CH   :  18    :		  	
   292                              <1> ;		---------------------------------------------
   293                              <1> ;		NOTES: - PARM 1 = GAP LENGTH FOR FORMAT
   294                              <1> ;		       - PARM 2 = EOT (LAST SECTOR ON TRACK)
   295                              <1> ;		       - DISK BASE IS POINTED BY DISK POINTER LOCATED
   296                              <1> ;			 AT ABSOLUTE ADDRESS 0:78.
   297                              <1> ;		       - WHEN FORMAT OPERATIONS ARE COMPLETE, THE PARAMETERS
   298                              <1> ;			 SHOULD BE RESTORED TO THEIR RESPECTIVE INITIAL VALUES.			
   299                              <1> ;-------------------------------------------------------------------------------
   300                              <1> ;	(AH) = 08H READ DRIVE PARAMETERS
   301                              <1> ;	REGISTERS
   302                              <1> ;	  INPUT
   303                              <1> ;	    (DL) - DRIVE NUMBER (0-1 ALLOWED, VALUE CHECKED)
   304                              <1> ;	     ** 27/05/2016 - TRDOS 386 (TRDOS v2.0) **	
   305                              <1> ;            ** EBX = Buffer address for floppy disk parameters table **
   306                              <1> ;	  OUTPUT
   307                              <1> ;	    (ES:DI) POINTS TO DRIVE PARAMETER TABLE
   308                              <1> ; 	    *** TRDOS 386 note: floppy disk parameter table (16 bytes)
   309                              <1> ;	    will be returned to user in EBX, buffer address *** 27/05/2016 ***		
   310                              <1> ;					
   311                              <1> ;	    (CH) - LOW ORDER 8 OF 10 BITS MAXIMUM NUMBER OF TRACKS
   312                              <1> ;	    (CL) - BITS 7 & 6 - HIGH ORDER TWO BITS OF MAXIMUM TRACKS
   313                              <1> ;	           BITS 5 THRU 0 - MAXIMUM SECTORS PER TRACK
   314                              <1> ;	    (DH) - MAXIMUM HEAD NUMBER
   315                              <1> ;	    (DL) - NUMBER OF DISKETTE DRIVES INSTALLED
   316                              <1> ;	    (BH) - 0
   317                              <1> ;	    (BL) - BITS 7 THRU 4 - 0
   318                              <1> ;	           BITS 3 THRU 0 - VALID DRIVE TYPE VALUE IN CMOS
   319                              <1> ;	    (AX) - 0
   320                              <1> ;	 UNDER THE FOLLOWING CIRCUMSTANCES:
   321                              <1> ;	    (1) THE DRIVE NUMBER IS INVALID,
   322                              <1> ;	    (2) THE DRIVE TYPE IS UNKNOWN AND CMOS IS NOT PRESENT, 
   323                              <1> ;	    (3) THE DRIVE TYPE IS UNKNOWN AND CMOS IS BAD,
   324                              <1> ;	    (4) OR THE DRIVE TYPE IS UNKNOWN AND THE CMOS DRIVE TYPE IS INVALID
   325                              <1> ;	    THEN ES,AX,BX,CX,DH,DI=0 ; DL=NUMBER OF DRIVES. 
   326                              <1> ;	    IF NO DRIVES ARE PRESENT THEN: ES,AX,BX,CX,DX,DI=0.
   327                              <1> ;	    @DISKETTE_STATUS = 0 AND CY IS RESET.
   328                              <1> ;-------------------------------------------------------------------------------
   329                              <1> ;	(AH)= 15H  READ DASD TYPE
   330                              <1> ;	OUTPUT REGISTERS
   331                              <1> ;	(AH) - ON RETURN IF CARRY FLAG NOT SET, OTHERWISE ERROR	
   332                              <1> ;		00 - DRIVE NOT PRESENT	
   333                              <1> ;		01 - DISKETTE, NO CHANGE LINE AVAILABLE
   334                              <1> ;		02 - DISKETTE, CHANGE LINE AVAILABLE	
   335                              <1> ;		03 - RESERVED (FIXED DISK)
   336                              <1> ;	(DL) - DRIVE NUMBER (0-1 ALLOWED, VALUE CHECKED)
   337                              <1> ;-------------------------------------------------------------------------------
   338                              <1> ;	(AH)= 16H  DISK CHANGE LINE STATUS
   339                              <1> ;	OUTPUT REGISTERS
   340                              <1> ;	(AH) - 00 - DISK CHANGE LINE NOT ACTIVE	
   341                              <1> ;	       06 - DISK CHANGE LINE ACTIVE & CARRY BIT ON
   342                              <1> ;	(DL) - DRIVE NUMBER (0-1 ALLOWED, VALUE CHECKED)
   343                              <1> ;-------------------------------------------------------------------------------
   344                              <1> ;	(AH)= 17H  SET DASD TYPE FOR FORMAT
   345                              <1> ;	INPUT REGISTERS
   346                              <1> ;	(AL) -	00 - NOT USED	
   347                              <1> ;		01 - DISKETTE 320/360K IN 360K DRIVE	
   348                              <1> ;		02 - DISKETTE 360K IN 1.2M DRIVE
   349                              <1> ;		03 - DISKETTE 1.2M IN 1.2M DRIVE
   350                              <1> ;		04 - DISKETTE 720K IN 720K DRIVE
   351                              <1> ;	(DL) - DRIVE NUMBER (0-1 ALLOWED, VALUE CHECKED:
   352                              <1> ;	       (DO NOT USE WHEN DISKETTE ATTACH CARD USED)
   353                              <1> ;-------------------------------------------------------------------------------
   354                              <1> ;	(AH)= 18H  SET MEDIA TYPE FOR FORMAT
   355                              <1> ;	INPUT REGISTERS
   356                              <1> ;	(CH) - LOW ORDER 8 OF 10 BITS MAXIMUM TRACKS
   357                              <1> ;	(CL) - BITS 7 & 6 - HIGH ORDER TWO BITS OF MAXIMUM TRACKS
   358                              <1> ;	       BITS 5 THRU 0 - MAXIMUM SECTORS PER TRACK
   359                              <1> ;	(DL) - DRIVE NUMBER (0-1 ALLOWED, VALUE CHACKED)
   360                              <1> ;	OUTPUT REGISTERS:
   361                              <1> ;	(ES:DI) - POINTER TO DRIVE PARAMETERS TABLE FOR THIS MEDIA TYPE,
   362                              <1> ;		  UNCHANGED IF (AH) IS NON-ZERO
   363                              <1> ;	(AH) - 00H, CY = 0, TRACK AND SECTORS/TRACK COMBINATION IS SUPPORTED
   364                              <1> ;	     - 01H, CY = 1, FUNCTION IS NOT AVAILABLE
   365                              <1> ;	     - 0CH, CY = 1, TRACK AND SECTORS/TRACK COMBINATION IS NOT SUPPORTED
   366                              <1> ;	     - 80H, CY = 1, TIME OUT (DISKETTE NOT PRESENT)		
   367                              <1> ;-------------------------------------------------------------------------------
   368                              <1> ;	DISK CHANGE STATUS IS ONLY CHECKED WHEN A MEDIA SPECIFIED IS OTHER
   369                              <1> ;	THAN 360 KB DRIVE. IF THE DISK CHANGE LINE IS FOUND TO BE
   370                              <1> ;	ACTIVE THE FOLLOWING ACTIONS TAKE PLACE:
   371                              <1> ;		ATTEMPT TO RESET DISK CHANGE LINE TO INACTIVE STATE. 
   372                              <1> ;		IF ATTEMPT SUCCEEDS SET DASD TYPE FOR FORMAT AND RETURN DISK 
   373                              <1> ;		CHANGE ERROR CODE
   374                              <1> ;		IF ATTEMPT FAILS RETURN TIMEOUT ERROR CODE AND SET DASD TYPE 
   375                              <1> ;		TO A PREDETERMINED STATE INDICATING MEDIA TYPE UNKNOWN.
   376                              <1> ;	IF THE DISK CHANGE LINE IN INACTIVE PERFORM SET DASD TYPE FOR FORMAT.
   377                              <1> ;
   378                              <1> ; DATA VARIABLE -- @DISK_POINTER
   379                              <1> ;	DOUBLE WORD POINTER TO THE CURRENT SET OF DISKETTE PARAMETERS
   380                              <1> ;-------------------------------------------------------------------------------
   381                              <1> ; OUTPUT FOR ALL FUNCTIONS
   382                              <1> ;	AH = STATUS OF OPERATION
   383                              <1> ;		STATUS BITS ARE DEFINED IN THE EQUATES FOR @DISKETTE_STATUS
   384                              <1> ;		VARIABLE IN THE DATA SEGMENT OF THIS MODULE
   385                              <1> ;	CY = 0	SUCCESSFUL OPERATION (AH=0 ON RETURN, EXCEPT FOR READ DASD
   386                              <1> ;		TYPE AH=(15)).
   387                              <1> ;	CY = 1	FAILED OPERATION (AH HAS ERROR REASON)
   388                              <1> ;	FOR READ/WRITE/VERIFY
   389                              <1> ;		DS,BX,DX,CX PRESERVED
   390                              <1> ;	NOTE: IF AN ERROR IS REPORTED BY THE DISKETTE CODE, THE APPROPRIATE 
   391                              <1> ;		ACTION IS TO RESET THE DISKETTE, THEN RETRY THE OPERATION.
   392                              <1> ;		ON READ ACCESSES, NO MOTOR START DELAY IS TAKEN, SO THAT 
   393                              <1> ;		THREE RETRIES ARE REQUIRED ON READS TO ENSURE THAT THE 
   394                              <1> ;		PROBLEM IS NOT DUE TO MOTOR START-UP.
   395                              <1> ;-------------------------------------------------------------------------------
   396                              <1> ;
   397                              <1> ; DISKETTE STATE MACHINE - ABSOLUTE ADDRESS 40:90 (DRIVE A) & 91 (DRIVE B)
   398                              <1> ;
   399                              <1> ;   -----------------------------------------------------------------
   400                              <1> ;   |       |       |       |       |       |       |       |       |
   401                              <1> ;   |   7   |   6   |   5   |   4   |   3   |   2   |   1   |   0   |
   402                              <1> ;   |       |       |       |       |       |       |       |       |
   403                              <1> ;   -----------------------------------------------------------------
   404                              <1> ;	|	|	|	|	|	|	|	|
   405                              <1> ;	|	|	|	|	|	-----------------
   406                              <1> ;	|	|	|	|	|		|
   407                              <1> ;	|	|	|	|    RESERVED		|
   408                              <1> ;	|	|	|	|		  PRESENT STATE
   409                              <1> ;	|	|	|	|	000: 360K IN 360K DRIVE UNESTABLISHED
   410                              <1> ;	|	|	|	|	001: 360K IN 1.2M DRIVE UNESTABLISHED
   411                              <1> ;	|	|	|	|	010: 1.2M IN 1.2M DRIVE UNESTABLISHED
   412                              <1> ;	|	|	|	|	011: 360K IN 360K DRIVE ESTABLISHED
   413                              <1> ;	|	|	|	|	100: 360K IN 1.2M DRIVE ESTABLISHED
   414                              <1> ;	|	|	|	|	101: 1.2M IN 1.2M DRIVE ESTABLISHED
   415                              <1> ;	|	|	|	|	110: RESERVED
   416                              <1> ;	|	|	|	|	111: NONE OF THE ABOVE
   417                              <1> ;	|	|	|	|
   418                              <1> ;	|	|	|	------>	MEDIA/DRIVE ESTABLISHED
   419                              <1> ;	|	|	|
   420                              <1> ;	|	|	-------------->	DOUBLE STEPPING REQUIRED (360K IN 1.2M
   421                              <1> ;	|	|			DRIVE)
   422                              <1> ;	|	|
   423                              <1> ;	------------------------------>	DATA TRANSFER RATE FOR THIS DRIVE:
   424                              <1> ;
   425                              <1> ;						00: 500 KBS
   426                              <1> ;						01: 300 KBS
   427                              <1> ;						10: 250 KBS
   428                              <1> ;						11: RESERVED
   429                              <1> ;
   430                              <1> ;
   431                              <1> ;-------------------------------------------------------------------------------
   432                              <1> ; STATE OPERATION STARTED - ABSOLUTE ADDRESS 40:92 (DRIVE A) & 93 (DRIVE B)
   433                              <1> ;-------------------------------------------------------------------------------
   434                              <1> ; PRESENT CYLINDER NUMBER - ABSOLUTE ADDRESS 40:94 (DRIVE A) & 95 (DRIVE B)
   435                              <1> ;-------------------------------------------------------------------------------
   436                              <1> 
   437                              <1> struc MD
   438 00000000 ??                  <1> 	.SPEC1		resb	1	; SRT=D, HD UNLOAD=0F - 1ST SPECIFY BYTE
   439 00000001 ??                  <1> 	.SPEC2		resb	1	; HD LOAD=1, MODE=DMA - 2ND SPECIFY BYTE
   440 00000002 ??                  <1> 	.OFF_TIM	resb	1	; WAIT TIME AFTER OPERATION TILL MOTOR OFF
   441 00000003 ??                  <1> 	.BYT_SEC	resb	1	; 512 BYTES/SECTOR
   442 00000004 ??                  <1> 	.SEC_TRK	resb	1	; EOT (LAST SECTOR ON TRACK)
   443 00000005 ??                  <1> 	.GAP		resb	1	; GAP LENGTH
   444 00000006 ??                  <1> 	.DTL		resb	1	; DTL
   445 00000007 ??                  <1> 	.GAP3		resb	1	; GAP LENGTH FOR FORMAT
   446 00000008 ??                  <1> 	.FIL_BYT	resb	1	; FILL BYTE FOR FORMAT
   447 00000009 ??                  <1> 	.HD_TIM		resb	1	; HEAD SETTLE TIME (MILLISECONDS)
   448 0000000A ??                  <1> 	.STR_TIM	resb	1	; MOTOR START TIME (1/8 SECONDS)
   449 0000000B ??                  <1> 	.MAX_TRK	resb	1	; MAX. TRACK NUMBER
   450 0000000C ??                  <1> 	.RATE		resb	1	; DATA TRANSFER RATE
   451                              <1> endstruc
   452                              <1> 
   453                              <1> BIT7OFF	EQU	7FH
   454                              <1> BIT7ON	EQU	80H
   455                              <1> 
   456                              <1> ; 30/08/2020 - TRDOS 386 v2
   457                              <1> 
   458                              <1> ;;int13h: ; 16/02/2015
   459                              <1> ;; 16/02/2015 - 21/02/2015
   460                              <1> ; 17/07/2022 - TRDOS 386 v2.0.5
   461                              <1> ;int40h:
   462                              <1> ;; 11/04/2021
   463                              <1> ;diskette_io:
   464                              <1> ;	clc ; 20/07/2020
   465                              <1> ;	pushfd
   466                              <1> ;	push 	cs
   467                              <1> ;	call 	DISKETTE_IO_1
   468                              <1> ;	retn
   469                              <1> 
   470                              <1> 	; 09/08/2022
   471                              <1> 	; 06/08/2022
   472                              <1> 	; 17/07/2022 - TRDOS 386 v2.0.5
   473                              <1> 	; (jump from DISK_IO)
   474                              <1> DISKETTE_IO_1:
   475                              <1> 	;sti ; 17/07/2022		; INTERRUPTS BACK ON
   476                              <1> 	
   477                              <1> 	;push	ebp			; USER REGISTER
   478                              <1> 	;push	edi			; USER REGISTER
   479                              <1> 	;push	edx			; HEAD #, DRIVE # OR USER REGISTER
   480                              <1> 	;push	ebx			; BUFFER OFFSET PARAMETER OR REGISTER
   481                              <1> 	;push	ecx			; TRACK #-SECTOR # OR USER REGISTER
   482                              <1> 	;mov	ebp, esp		; BP     => PARAMETER LIST DEP. ON AH
   483                              <1> 					; [BP]   = SECTOR #
   484                              <1> 					; [BP+1] = TRACK #
   485                              <1> 					; [BP+2] = BUFFER OFFSET
   486                              <1> 					; FOR RETURN OF DRIVE PARAMETERS:
   487                              <1> 					; CL/[BP] = BITS 7&6 HI BITS OF MAX CYL
   488                              <1> 					; 	    BITS 0-5 MAX SECTORS/TRACK
   489                              <1> 					; CH/[BP+1] = LOW 8 BITS OF MAX CYL.
   490                              <1> 					; BL/[BP+2] = BITS 7-4 = 0
   491                              <1> 					;	      BITS 3-0 = VALID CMOS TYPE
   492                              <1> 					; BH/[BP+3] = 0
   493                              <1> 					; DL/[BP+4] = # DRIVES INSTALLED
   494                              <1> 					; DH/[BP+5] = MAX HEAD #
   495                              <1> 					; DI/[BP+6] = OFFSET TO DISK BASE
   496                              <1> 	;push	es ; 06/02/2015	
   497                              <1> 	;push	ds			; BUFFER SEGMENT PARM OR USER REGISTER
   498                              <1> 	;push	esi			; USER REGISTERS
   499                              <1> 	;;call	DDS			; SEGMENT OF BIOS DATA AREA TO DS
   500                              <1> 	;;mov	cx, cs
   501                              <1> 	;;mov	ds, cx
   502                              <1> 	;mov	cx, KDATA
   503                              <1> 	;mov	ds, cx
   504                              <1> 	;mov	es, cx
   505                              <1> 
   506                              <1> 	; 17/07/2022
   507                              <1> 	; Registers are also on stack 
   508                              <1> 	; (with same contents) 
   509                              <1> 	; in following order:
   510                              <1> 	;
   511                              <1> 	;    ebx = esp+20
   512                              <1> 	;    ecx = esp+16
   513                              <1> 	;    edx = esp+12
   514                              <1> 	;    esi = esp+8
   515                              <1> 	;    edi = esp+4
   516                              <1> 	;
   517                              <1> 	; [esp] = caller's return address (from 'DISK_IO')	
   518                              <1> 	;
   519                              <1> 	; cs = KCODE == KDATA
   520                              <1> 	; ds = es = ss = KDATA
   521                              <1> 
   522                              <1> 	; 17/07/2022
   523 000041F0 55                  <1> 	push	ebp
   524 000041F1 89DD                <1> 	mov	ebp, ebx
   525                              <1> 
   526                              <1> 	;cmp	ah, (FNC_TAE-FNC_TAB)/2	; CHECK FOR > LARGEST FUNCTION
   527 000041F3 80FC19              <1> 	cmp	ah, (FNC_TAE-FNC_TAB)/4	; 18/02/2015
   528                              <1> 	;jb	short OK_FUNC		; FUNCTION OK
   529                              <1> 	;mov	ah, 14h			; REPLACE WITH KNOWN INVALID FUNCTION
   530                              <1> 	; 09/08/2022
   531 000041F6 730F                <1> 	jnb	short INV_FUNC
   532                              <1> OK_FUNC:
   533 000041F8 80FC01              <1> 	cmp	ah, 1			; RESET OR STATUS ?
   534 000041FB 760C                <1> 	jbe	short OK_DRV		; IF RESET OR STATUS DRIVE ALWAYS OK
   535 000041FD 80FC08              <1> 	cmp	ah, 8			; READ DRIVE PARMS ?
   536 00004200 7407                <1> 	je	short OK_DRV		; IF SO DRIVE CHECKED LATER
   537 00004202 80FA01              <1> 	cmp	dl, 1			; DRIVES 0 AND 1 OK
   538 00004205 7602                <1> 	jbe	short OK_DRV		; IF 0 OR 1 THEN JUMP
   539                              <1> INV_FUNC:
   540 00004207 B414                <1> 	mov	ah, 14h			; REPLACE WITH KNOWN INVALID FUNCTION
   541                              <1> OK_DRV:
   542                              <1> 	; 17/07/2022
   543                              <1> 	;xor	ecx, ecx
   544                              <1> 	;;mov	esi, ecx ; 08/02/2015
   545                              <1> 	;mov	edi, ecx ; 08/02/2015
   546                              <1> 	;mov	cl, ah			; CL = FUNCTION
   547                              <1> 	;;xor	ch, ch			; CX = FUNCTION
   548                              <1> 	;;shl	cl, 1			; FUNCTION TIMES 2
   549                              <1> 	;shl	cl, 2 ; 20/02/2015	; FUNCTION TIMES 4 (for 32 bit offset)
   550                              <1> 	;mov	ebx, FNC_TAB		; LOAD START OF FUNCTION TABLE
   551                              <1> 	;add	ebx, ecx		; ADD OFFSET INTO TABLE => ROUTINE
   552                              <1> 
   553                              <1> 	; 17/07/2022	
   554 00004209 29DB                <1> 	sub	ebx, ebx
   555 0000420B 88E3                <1> 	mov	bl, ah			; BL = FUNCTION	
   556 0000420D C0E302              <1> 	shl	bl, 2 ; * 4
   557 00004210 81C3[2F420000]      <1> 	add	ebx, FNC_TAB		; [EBX] = FUNCTION ADDRESS
   558                              <1> 	
   559 00004216 88F4                <1> 	mov	ah, dh			; AX = HEAD #,# OF SECTORS OR DASD TYPE
   560                              <1> 	;xor	dh, dh			; DX = DRIVE #
   561                              <1> 	;mov	si, ax			; SI = HEAD #,# OF SECTORS OR DASD TYPE
   562                              <1> 	;mov	di, dx			; DI = DRIVE #
   563                              <1> 	
   564 00004218 0FB7F0              <1> 	movzx	esi, ax			; ESI = HEAD #,# OF SECTORS OR DASD TYPE
   565 0000421B 0FB6FA              <1> 	movzx	edi, dl			; EDI = DRIVE # 
   566                              <1> 
   567                              <1> 	; CH = cylinder number (low 8 bit)
   568                              <1> 	; CL = sector number (and high 2 bits of cylinder number)
   569                              <1> 
   570                              <1> 	; 06/08/2022
   571                              <1> 	; 11/12/2014
   572                              <1>         ;mov	[cfd], dl               ; current floppy drive (for 'GET_PARM')        
   573                              <1> 	; 06/08/2022
   574                              <1> 	; EDI = (current) DRIVE #
   575                              <1> 	;
   576 0000421E 8A25[D0770100]      <1> 	mov	ah, [DSKETTE_STATUS]	; LOAD STATUS TO AH FOR STATUS FUNCTION
   577 00004224 C605[D0770100]00    <1> 	mov	byte [DSKETTE_STATUS], 0 ; INITIALIZE FOR ALL OTHERS
   578                              <1> 
   579                              <1> ;	THROUGHOUT THE DISKETTE BIOS, THE FOLLOWING INFORMATION IS CONTAINED IN
   580                              <1> ;	THE FOLLOWING MEMORY LOCATIONS AND REGISTERS. NOT ALL DISKETTE BIOS
   581                              <1> ;	FUNCTIONS REQUIRE ALL OF THESE PARAMETERS.
   582                              <1> ;
   583                              <1> ;		DI	: DRIVE #
   584                              <1> ;		SI-HI	: HEAD #
   585                              <1> ;		SI-LOW	: # OF SECTORS OR DASD TYPE FOR FORMAT
   586                              <1> ;		ES	: BUFFER SEGMENT
   587                              <1> ;		[BP]	: SECTOR #
   588                              <1> ;		[BP+1]	: TRACK #
   589                              <1> ;		[BP+2]	: BUFFER OFFSET
   590                              <1> ;
   591                              <1> ;	ACROSS CALLS TO SUBROUTINES THE CARRY FLAG (CY=1), WHERE INDICATED IN 
   592                              <1> ;	SUBROUTINE PROLOGUES, REPRESENTS AN EXCEPTION RETURN (NORMALLY AN ERROR 
   593                              <1> ;	CONDITION). IN MOST CASES, WHEN CY = 1, @DSKETTE_STATUS CONTAINS THE 
   594                              <1> ;	SPECIFIC ERROR CODE.
   595                              <1> 
   596                              <1> 	; 17/07/2022
   597                              <1> 	; EBX = pointer to function address
   598                              <1> 	; EBP = buffer address
   599                              <1> 	; EDI = drive number (0 or 1)
   600                              <1> 	; ESI = head number (byte 1) and sector count or disk type (byte 0)
   601                              <1> 	; CH = cylinder number (low 8 bit)
   602                              <1> 	; CL = sector number (and high 2 bits of cylinder number)
   603                              <1> 
   604                              <1> 					; (AH) = @DSKETTE_STATUS
   605 0000422B FF13                <1> 	call	dword [ebx]		; CALL THE REQUESTED FUNCTION
   606                              <1> 	
   607                              <1> 	;pop	esi			; RESTORE ALL REGISTERS
   608                              <1> 	;pop	ds
   609                              <1> 	;pop	es	; 06/02/2015
   610                              <1> 	;pop	ecx
   611                              <1> 	;pop	ebx
   612                              <1> 	;pop	edx
   613                              <1> 	;pop	edi
   614                              <1> 	;mov	ebp, esp
   615                              <1> 	;push	eax
   616                              <1> 	;pushfd
   617                              <1> 	;pop	eax
   618                              <1> 	;;mov	[bp+6], ax
   619                              <1> 	;mov	[ebp+12], eax  ; 18/02/2015, flags
   620                              <1> 	;pop	eax
   621                              <1> 	;pop	ebp
   622                              <1> 	;iretd
   623                              <1> 
   624                              <1> 	; 17/07/2022
   625 0000422D 5D                  <1> 	pop	ebp
   626                              <1> 
   627                              <1> 	; 17/07/2022
   628                              <1> 	; Stack order:
   629                              <1> 	;    ebx = esp+20
   630                              <1> 	;    ecx = esp+16
   631                              <1> 	;    edx = esp+12
   632                              <1> 	;    esi = esp+8
   633                              <1> 	;    edi = esp+4
   634                              <1> 	;
   635                              <1> 	; [esp] = caller's return address (from 'DISK_IO')
   636                              <1> 
   637                              <1> 	; CF = disk i/o status (1 = error)
   638                              <1> 	; AH = error code (if > 0 and cf = 1)
   639                              <1> 
   640                              <1> 	; 17/07/2022
   641 0000422E C3                  <1> 	retn	; return to the caller of 'DISK_IO' 
   642                              <1> 
   643                              <1> ;-------------------------------------------------------------------------------
   644                              <1> ; DW --> dd (06/02/2015)
   645 0000422F [93420000]          <1> FNC_TAB	dd	DSK_RESET		; AH = 00H; RESET
   646 00004233 [FE420000]          <1> 	dd	DSK_STATUS		; AH = 01H; STATUS
   647 00004237 [0E430000]          <1> 	dd	DSK_READ		; AH = 02H; READ
   648 0000423B [1B430000]          <1> 	dd	DSK_WRITE		; AH = 03H; WRITE
   649 0000423F [23440000]          <1> 	dd	DSK_VERF		; AH = 04H; VERIFY
   650 00004243 [33440000]          <1> 	dd	DSK_FORMAT		; AH = 05H; FORMAT
   651 00004247 [B1440000]          <1> 	dd	FNC_ERR			; AH = 06H; INVALID
   652 0000424B [B1440000]          <1> 	dd	FNC_ERR			; AH = 07H; INVALID
   653 0000424F [BD440000]          <1> 	dd	DSK_PARMS		; AH = 08H; READ DRIVE PARAMETERS
   654 00004253 [B1440000]          <1> 	dd	FNC_ERR			; AH = 09H; INVALID
   655 00004257 [B1440000]          <1> 	dd	FNC_ERR			; AH = 0AH; INVALID
   656 0000425B [B1440000]          <1> 	dd	FNC_ERR			; AH = 0BH; INVALID
   657 0000425F [B1440000]          <1> 	dd	FNC_ERR			; AH = 0CH; INVALID
   658 00004263 [B1440000]          <1> 	dd	FNC_ERR			; AH = 0DH; INVALID
   659 00004267 [B1440000]          <1> 	dd	FNC_ERR			; AH = 0EH; INVALID
   660 0000426B [B1440000]          <1> 	dd	FNC_ERR			; AH = 0FH; INVALID
   661 0000426F [B1440000]          <1> 	dd	FNC_ERR			; AH = 10H; INVALID
   662 00004273 [B1440000]          <1> 	dd	FNC_ERR			; AH = 11H; INVALID
   663 00004277 [B1440000]          <1> 	dd	FNC_ERR			; AH = 12H; INVALID
   664 0000427B [B1440000]          <1> 	dd	FNC_ERR			; AH = 13H; INVALID
   665 0000427F [B1440000]          <1> 	dd	FNC_ERR			; AH = 14H; INVALID
   666 00004283 [7A450000]          <1> 	dd	DSK_TYPE		; AH = 15H; READ DASD TYPE
   667 00004287 [9A450000]          <1> 	dd	DSK_CHANGE		; AH = 16H; CHANGE STATUS
   668 0000428B [C9450000]          <1> 	dd	FORMAT_SET		; AH = 17H; SET DASD TYPE
   669 0000428F [3E460000]          <1> 	dd	SET_MEDIA		; AH = 18H; SET MEDIA TYPE	
   670                              <1> FNC_TAE EQU     $                       ; END
   671                              <1> 
   672                              <1> 	; 17/07/2022 - TRDOS 386 v2.0.5
   673                              <1> ;-------------------------------------------------------------------------------
   674                              <1> ; DISK_RESET	(AH = 00H)	
   675                              <1> ;		RESET THE DISKETTE SYSTEM.
   676                              <1> ;
   677                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
   678                              <1> ;-------------------------------------------------------------------------------
   679                              <1> DSK_RESET:
   680                              <1> 	; 17/07/2022
   681 00004293 66BAF203            <1> 	mov	dx, 03F2h		; ADAPTER CONTROL PORT
   682 00004297 FA                  <1> 	cli				; NO INTERRUPTS
   683 00004298 A0[CE770100]        <1> 	mov	al, [MOTOR_STATUS]	; GET DIGITAL OUTPUT REGISTER REFLECTION
   684 0000429D 243F                <1> 	and	al, 00111111b		; KEEP SELECTED AND MOTOR ON BITS
   685 0000429F C0C004              <1> 	rol	al, 4			; MOTOR VALUE TO HIGH NIBBLE
   686                              <1> 					; DRIVE SELECT TO LOW NIBBLE
   687 000042A2 0C08                <1> 	or	al, 00001000b		; TURN ON INTERRUPT ENABLE
   688 000042A4 EE                  <1> 	out	dx, al			; RESET THE ADAPTER
   689 000042A5 C605[CD770100]00    <1> 	mov	byte [SEEK_STATUS], 0	; SET RECALIBRATE REQUIRED ON ALL DRIVES
   690                              <1> 	;jmp	$+2			; WAIT FOR I/O
   691                              <1> 	;jmp	$+2			; WAIT FOR I/O (TO INSURE MINIMUM
   692                              <1> 					;      PULSE WIDTH)
   693                              <1> 	; 19/12/2014
   694                              <1> 	NEWIODELAY
    83 000042AC E6EB                <2>  out 0EBh, al
   695                              <1> 
   696                              <1> 	; 17/12/2014 
   697                              <1> 	; AWARD BIOS 1999 - RESETDRIVES (ADISK.ASM)
   698 000042AE B915000000          <1> 	mov	ecx, WAITCPU_RESET_ON	; cx = 21 -- Min. 14 micro seconds !?
   699                              <1> wdw1:
   700                              <1> 	NEWIODELAY   ; 27/02/2015
    83 000042B3 E6EB                <2>  out 0EBh, al
   701 000042B5 E2FC                <1> 	loop	wdw1
   702                              <1> 	;
   703 000042B7 0C04                <1> 	or	al, 00000100b		; TURN OFF RESET BIT
   704 000042B9 EE                  <1> 	out	dx, al			; RESET THE ADAPTER
   705                              <1> 	; 16/12/2014
   706                              <1> 	IODELAY
    78 000042BA EB00                <2>  jmp short $+2
    79 000042BC EB00                <2>  jmp short $+2
   707                              <1> 	;
   708                              <1> 	;sti				; ENABLE THE INTERRUPTS
   709 000042BE E8D10A0000          <1> 	call	WAIT_INT		; WAIT FOR THE INTERRUPT
   710 000042C3 7230                <1> 	jc	short DR_ERR		; IF ERROR, RETURN IT
   711                              <1> 	;mov	cx, 11000000b		; CL = EXPECTED @NEC_STATUS
   712                              <1> 	; 17/07/2022
   713                              <1> 	;xor	ch, ch
   714 000042C5 B1C0                <1> 	mov	cl, 11000000b
   715                              <1> NXT_DRV:
   716                              <1> 	;push	cx			; SAVE FOR CALL
   717                              <1> 	; 11/04/2021
   718 000042C7 51                  <1> 	push	ecx
   719 000042C8 B8[F4420000]        <1> 	mov	eax, DR_POP_ERR 	; LOAD NEC_OUTPUT ERROR ADDRESS
   720 000042CD 50                  <1> 	push	eax			; "
   721 000042CE B408                <1> 	mov	ah, 08h			; SENSE INTERRUPT STATUS COMMAND
   722 000042D0 E8B7090000          <1> 	call	NEC_OUTPUT
   723 000042D5 58                  <1> 	pop	eax			; THROW AWAY ERROR RETURN
   724 000042D6 E8E80A0000          <1> 	call	RESULTS			; READ IN THE RESULTS
   725                              <1> 	;pop	cx			; RESTORE AFTER CALL
   726                              <1> 	; 11/04/2021
   727 000042DB 59                  <1> 	pop	ecx
   728 000042DC 7217                <1> 	jc	short DR_ERR		; ERROR RETURN
   729 000042DE 3A0D[D1770100]      <1> 	cmp	cl, [NEC_STATUS]	; TEST FOR DRIVE READY TRANSITION
   730 000042E4 750F                <1> 	jnz	short DR_ERR		; EVERYTHING OK
   731 000042E6 FEC1                <1> 	inc	cl			; NEXT EXPECTED @NEC_STATUS
   732 000042E8 80F9C3              <1> 	cmp	cl, 11000011b		; ALL POSSIBLE DRIVES CLEARED
   733 000042EB 76DA                <1> 	jbe	short NXT_DRV		; FALL THRU IF 11000100B OR >
   734                              <1> 	;
   735 000042ED E8F4030000          <1> 	call	SEND_SPEC		; SEND SPECIFY COMMAND TO NEC
   736                              <1> RESBAC:
   737                              <1> 	; 06/08/2022
   738 000042F2 EB10                <1> 	jmp	short SETUP_END_X
   739                              <1> 	;call	SETUP_END		; VARIOUS CLEANUPS
   740                              <1> 	;;mov	bx, si			; GET SAVED AL TO BL
   741                              <1> 	;; 17/07/2022
   742                              <1> 	;mov	ebx, esi		
   743                              <1> 	;mov	al, bl			; PUT BACK FOR RETURN
   744                              <1> 	;retn		
   745                              <1> 
   746                              <1> DR_POP_ERR:
   747                              <1> 	;pop	cx			; CLEAR STACK
   748                              <1> 	; 11/04/2021
   749 000042F4 59                  <1> 	pop	ecx
   750                              <1> DR_ERR:
   751 000042F5 800D[D0770100]20    <1> 	or	byte [DSKETTE_STATUS], BAD_NEC ; SET ERROR CODE
   752                              <1> 	;jmp	short RESBAC		; RETURN FROM RESET
   753                              <1> 	; 06/08/2022
   754 000042FC EB06                <1> 	jmp	short SETUP_END_X
   755                              <1> 
   756                              <1> ;-------------------------------------------------------------------------------
   757                              <1> ; DISK_STATUS	(AH = 01H)
   758                              <1> ;	DISKETTE STATUS.
   759                              <1> ;
   760                              <1> ; ON ENTRY:	AH : STATUS OF PREVIOUS OPERATION
   761                              <1> ;
   762                              <1> ; ON EXIT:	AH, @DSKETTE_STATUS, CY REFLECT STATUS OF PREVIOUS OPERATION.
   763                              <1> ;-------------------------------------------------------------------------------
   764                              <1> DSK_STATUS:
   765 000042FE 8825[D0770100]      <1> 	mov	[DSKETTE_STATUS], ah	; PUT BACK FOR SETUP END
   766                              <1> SETUP_END_X:	; 06/08/2022
   767 00004304 E8FD000000          <1> 	call	SETUP_END		; VARIOUS CLEANUPS
   768                              <1> 	;mov	bx, si			; GET SAVED AL TO BL
   769                              <1> 	;mov	al, bl			; PUT BACK FOR RETURN
   770                              <1> 	; 06/08/2022
   771 00004309 89F3                <1> 	mov	ebx, esi
   772 0000430B 88D8                <1> 	mov	al, bl
   773 0000430D C3                  <1> 	retn		
   774                              <1> 
   775                              <1> ;-------------------------------------------------------------------------------
   776                              <1> ; DISK_READ	(AH = 02H)	
   777                              <1> ;	DISKETTE READ.
   778                              <1> ;
   779                              <1> ; ON ENTRY:	DI	: DRIVE #
   780                              <1> ;		SI-HI	: HEAD #
   781                              <1> ;		SI-LOW	: # OF SECTORS
   782                              <1> ;		ES	: BUFFER SEGMENT
   783                              <1> ;		[BP]	: SECTOR #
   784                              <1> ;		[BP+1]	: TRACK #
   785                              <1> ;		[BP+2]	: BUFFER OFFSET
   786                              <1> ;
   787                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
   788                              <1> ;-------------------------------------------------------------------------------
   789                              <1> 
   790                              <1> ; 06/02/2015, ES:BX -> EBX (unix386.s)
   791                              <1> 
   792                              <1> DSK_READ:
   793 0000430E 8025[CE770100]7F    <1> 	and	byte [MOTOR_STATUS], 01111111b ; INDICATE A READ OPERATION
   794 00004315 66B846E6            <1> 	mov	ax, 0E646h		; AX = NEC COMMAND, DMA COMMAND
   795                              <1> 	;call	RD_WR_VF		; COMMON READ/WRITE/VERIFY
   796                              <1> 	;retn
   797                              <1> 	; 06/08/2022
   798 00004319 EB0B                <1> 	jmp	short RD_WR_VF
   799                              <1> 
   800                              <1> ;-------------------------------------------------------------------------------
   801                              <1> ; DISK_WRITE	(AH = 03H)
   802                              <1> ;	DISKETTE WRITE.
   803                              <1> ;
   804                              <1> ; ON ENTRY:	DI	: DRIVE #
   805                              <1> ;		SI-HI	: HEAD #
   806                              <1> ;		SI-LOW	: # OF SECTORS
   807                              <1> ;		ES	: BUFFER SEGMENT
   808                              <1> ;		[BP]	: SECTOR #
   809                              <1> ;		[BP+1]	: TRACK #
   810                              <1> ;		[BP+2]	: BUFFER OFFSET
   811                              <1> ;
   812                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
   813                              <1> ;-------------------------------------------------------------------------------
   814                              <1> 
   815                              <1> ; 06/02/2015, ES:BX -> EBX (unix386.s)
   816                              <1> 
   817                              <1> DSK_WRITE:
   818 0000431B 66B84AC5            <1> 	mov	ax, 0C54Ah		; AX = NEC COMMAND, DMA COMMAND
   819 0000431F 800D[CE770100]80    <1> 	or	byte [MOTOR_STATUS], 10000000b ; INDICATE WRITE OPERATION
   820                              <1> 	;call	RD_WR_VF		; COMMON READ/WRITE/VERIFY
   821                              <1> 	;retn
   822                              <1> 	; 06/08/2022
   823                              <1> 	;jmp	short RD_WR_VF
   824                              <1> 
   825                              <1> 	; 09/08/2022
   826                              <1> 	; 06/08/2022 - TRDOS 386 Kernel v2.0.5
   827                              <1> ;-------------------------------------------------------------------------------
   828                              <1> ; RD_WR_VF
   829                              <1> ;	COMMON READ, WRITE AND VERIFY: 
   830                              <1> ;	MAIN LOOP FOR STATE RETRIES.
   831                              <1> ;
   832                              <1> ; ON ENTRY:	AH = READ/WRITE/VERIFY NEC PARAMETER
   833                              <1> ;		AL = READ/WRITE/VERIFY DMA PARAMETER
   834                              <1> ;
   835                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
   836                              <1> ;-------------------------------------------------------------------------------
   837                              <1> RD_WR_VF:
   838                              <1> 	; 11/08/2022
   839                              <1> 	; 09/08/2022
   840                              <1> 	; 07/08/2022
   841                              <1> 	; 06/08/2022
   842                              <1> 	; 11/04/2021 (32 bit push/pop, AX -> EAX)
   843 00004326 50                  <1> 	push	eax			; SAVE DMA, NEC PARAMETERS
   844 00004327 E803040000          <1> 	call	XLAT_NEW		; TRANSLATE STATE TO PRESENT ARCH.
   845 0000432C E86A040000          <1> 	call	SETUP_STATE		; INITIALIZE START AND END RATE
   846 00004331 58                  <1> 	pop	eax			; RESTORE READ/WRITE/VERIFY
   847                              <1> DO_AGAIN:
   848 00004332 50                  <1> 	push	eax			; SAVE READ/WRITE/VERIFY PARAMETER
   849 00004333 E8F8040000          <1> 	call	MED_CHANGE		; MEDIA CHANGE AND RESET IF CHANGED
   850 00004338 58                  <1> 	pop	eax			; RESTORE READ/WRITE/VERIFY
   851                              <1> 	;jc	short RWV_END		; MEDIA CHANGE ERROR OR TIME-OUT
   852                              <1> 	; 07/08/2022
   853 00004339 7305                <1> 	jnc	short RWV
   854 0000433B E9BC000000          <1> 	jmp	RWV_END
   855                              <1> RWV:
   856 00004340 50                  <1> 	push	eax			; SAVE READ/WRITE/VERIFY PARAMETER
   857 00004341 8AB7[DB770100]      <1> 	mov	dh, [DSK_STATE+edi]	; GET RATE STATE OF THIS DRIVE
   858 00004347 80E6C0              <1> 	and	dh, RATE_MSK		; KEEP ONLY RATE
   859 0000434A E83E080000          <1> 	call	CMOS_TYPE		; RETURN DRIVE TYPE IN AL (AL)
   860                              <1> 	;;20/02/2015
   861                              <1> 	;;jc	short RWV_ASSUME	; ERROR IN CMOS
   862 0000434F 7447                <1> 	jz	short RWV_ASSUME ; 20/02/2015
   863 00004351 3C01                <1> 	cmp	al, 1			; 40 TRACK DRIVE?
   864 00004353 750D                <1> 	jne	short RWV_1		; NO, BYPASS CMOS VALIDITY CHECK
   865 00004355 F687[DB770100]01    <1> 	test	byte [DSK_STATE+edi], TRK_CAPA ; CHECK FOR 40 TRACK DRIVE
   866 0000435C 7411                <1> 	jz	short RWV_2		; YES, CMOS IS CORRECT
   867                              <1> 	;mov	al, 2			; CHANGE TO 1.2M
   868                              <1> 	; 06/08/2022
   869 0000435E FEC0                <1> 	inc	al ; al = 2
   870 00004360 EB0D                <1> 	jmp	short RWV_2
   871                              <1> RWV_1:
   872                              <1> 	; 09/08/2022
   873                              <1> 	;jb	short RWV_2		; NO DRIVE SPECIFIED, CONTINUE
   874 00004362 F687[DB770100]01    <1> 	test    byte [DSK_STATE+edi], TRK_CAPA ; IS IT REALLY 40 TRACK?
   875 00004369 7504                <1> 	jnz	short RWV_2		; NO, 80 TRACK
   876 0000436B B001                <1> 	mov	al, 1			; IT IS 40 TRACK, FIX CMOS VALUE
   877 0000436D EB00                <1> 	jmp	short rwv_3
   878                              <1> RWV_2:
   879                              <1> 	; 09/08/2022
   880                              <1> 	;or	al, al			; TEST FOR NO DRIVE
   881                              <1> 	;jz	short RWV_ASSUME	; ASSUME TYPE, USE MAX TRACK
   882                              <1> rwv_3:
   883 0000436F E855030000          <1> 	call	DR_TYPE_CHECK		; RTN CS:BX = MEDIA/DRIVE PARAM TBL.
   884 00004374 7222                <1> 	jc	short RWV_ASSUME	; TYPE NOT IN TABLE (BAD CMOS)
   885                              <1> 
   886                              <1> ;-----	SEARCH FOR MEDIA/DRIVE PARAMETER TABLE
   887                              <1> 
   888 00004376 57                  <1> 	push	edi			; SAVE DRIVE #
   889                              <1> 	; 09/08/2022
   890                              <1> 	;xor	ebx, ebx		; EBX = INDEX TO DR_TYPE TABLE
   891 00004377 BB[F8640000]        <1> 	mov	ebx, DR_TYPE
   892                              <1> 	;mov	ecx, DR_CNT		; ECX = LOOP COUNT
   893 0000437C B106                <1> 	mov	cl, DR_CNT
   894                              <1> RWV_DR_SEARCH:
   895                              <1> 	;mov	ah, [DR_TYPE+ebx]	; GET DRIVE TYPE
   896 0000437E 8A23                <1> 	mov	ah, [ebx]
   897 00004380 80E47F              <1> 	and	ah, BIT7OFF		; MASK OUT MSB
   898 00004383 38E0                <1> 	cmp	al, ah			; DRIVE TYPE MATCH?
   899                              <1> 	; 09/08/2022
   900                              <1> 	;cmp	dl, ah
   901 00004385 7509                <1> 	jne	short RWV_NXT_MD	; NO, CHECK NEXT DRIVE TYPE
   902                              <1> RWV_DR_FND:
   903                              <1> 	;mov	edi, [DR_TYPE+ebx+1] 	; EDI = MEDIA/DRIVE PARAMETER TABLE
   904 00004387 43                  <1> 	inc	ebx
   905 00004388 8B3B                <1> 	mov	edi, [ebx]
   906 0000438A 4B                  <1> 	dec	ebx
   907                              <1> RWV_MD_SEARH:
   908 0000438B 3A770C              <1>         cmp	dh, [edi+MD.RATE]       ; MATCH?
   909 0000438E 741D                <1> 	je	short RWV_MD_FND	; YES, GO GET 1ST SPECIFY BYTE
   910                              <1> RWV_NXT_MD:
   911 00004390 83C305              <1> 	add	ebx, 5			; CHECK NEXT DRIVE TYPE
   912                              <1> 	;loop	RWV_DR_SEARCH
   913 00004393 FEC9                <1> 	dec	cl
   914 00004395 75E7                <1> 	jnz	short RWV_DR_SEARCH 
   915 00004397 5F                  <1> 	pop	edi			; RESTORE DRIVE #
   916                              <1> 
   917                              <1> ;-----	ASSUME PRIMARY DRIVE IS INSTALLED AS SHIPPED
   918                              <1> 
   919                              <1> RWV_ASSUME:
   920 00004398 BB[16650000]        <1> 	mov	ebx, MD_TBL1		; POINT TO 40 TRACK 250 KBS
   921 0000439D F687[DB770100]01    <1> 	test 	byte [DSK_STATE+edi], TRK_CAPA ; TEST FOR 80 TRACK
   922 000043A4 740A                <1> 	jz	short RWV_MD_FND1	; MUST BE 40 TRACK
   923 000043A6 BB[30650000]        <1> 	mov	ebx, MD_TBL3		; POINT TO 80 TRACK 500 KBS
   924 000043AB EB03                <1> 	jmp	short RWV_MD_FND1	; GO SPECIFY PARAMTERS
   925                              <1> 
   926                              <1> ;-----	CS:BX POINTS TO MEDIA/DRIVE PARAMETER TABLE
   927                              <1> 	 			
   928                              <1> RWV_MD_FND:
   929 000043AD 89FB                <1> 	mov	ebx, edi		; BX = MEDIA/DRIVE PARAMETER TABLE
   930 000043AF 5F                  <1> 	pop	edi			; RESTORE DRIVE #
   931                              <1> 	
   932                              <1> ;-----	SEND THE SPECIFY COMMAND TO THE CONTROLLER
   933                              <1> 
   934                              <1> RWV_MD_FND1:
   935 000043B0 E85A030000          <1> 	call	SEND_SPEC_MD
   936 000043B5 E8E3040000          <1> 	call	CHK_LASTRATE		; ZF=1 ATTEMP RATE IS SAME AS LAST RATE
   937 000043BA 7405                <1> 	jz	short RWV_DBL		; YES,SKIP SEND RATE COMMAND
   938 000043BC E8BC040000          <1> 	call	SEND_RATE		; SEND DATA RATE TO NEC
   939                              <1> RWV_DBL:
   940 000043C1 53                  <1> 	push	ebx			; SAVE MEDIA/DRIVE PARAM TBL ADDRESS
   941 000043C2 E825070000          <1> 	call	SETUP_DBL		; CHECK FOR DOUBLE STEP
   942 000043C7 5B                  <1> 	pop	ebx			; RESTORE ADDRESS
   943 000043C8 7225                <1> 	jc	short CHK_RET		; ERROR FROM READ ID, POSSIBLE RETRY
   944                              <1> 	;pop	eax			; RESTORE NEC COMMAND
   945                              <1> 	;push	eax			; SAVE NEC COMMAND
   946                              <1> 	; 09/08/2022
   947 000043CA 8B0424              <1> 	mov	eax, [esp]
   948                              <1> 	;push	ebx			; SAVE MEDIA/DRIVE PARAM TBL ADDRESS
   949 000043CD E8E0040000          <1> 	call	DMA_SETUP		; SET UP THE DMA
   950                              <1> 	;pop	ebx
   951 000043D2 58                  <1> 	pop	eax			; RESTORE NEC COMMAND
   952 000043D3 7231                <1> 	jc	short RWV_BAC		; CHECK FOR DMA BOUNDARY ERROR
   953 000043D5 50                  <1> 	push	eax			; SAVE NEC COMMAND
   954 000043D6 53                  <1> 	push	ebx			; SAVE MEDIA/DRIVE PARAM TBL ADDRESS
   955                              <1> 	; 11/08/2022
   956 000043D7 8B5C2420            <1> 	mov	ebx, [esp+32] ; ECX
   957 000043DB E866050000          <1> 	call	NEC_INIT		; INITIALIZE NEC
   958 000043E0 5B                  <1> 	pop	ebx			; RESTORE ADDRESS
   959 000043E1 720C                <1> 	jc	short CHK_RET		; ERROR - EXIT
   960 000043E3 E88C050000          <1> 	call	RWV_COM			; OP CODE COMMON TO READ/WRITE
   961 000043E8 7205                <1> 	jc	short CHK_RET		; ERROR - EXIT
   962 000043EA E8D2050000          <1> 	call	NEC_TERM		; TERMINATE, GET STATUS, ETC.
   963                              <1> CHK_RET:
   964 000043EF E871060000          <1> 	call	RETRY			; CHECK FOR, SETUP RETRY
   965 000043F4 58                  <1> 	pop	eax			; RESTORE READ/WRITE PARAMETER
   966 000043F5 7305                <1> 	jnc	short RWV_END		; CY = 0 NO RETRY
   967 000043F7 E936FFFFFF          <1>         jmp	DO_AGAIN                ; CY = 1 MEANS RETRY
   968                              <1> RWV_END:
   969 000043FC E81C060000          <1> 	call	DSTATE			; ESTABLISH STATE IF SUCCESSFUL
   970 00004401 E8AE060000          <1> 	call	NUM_TRANS		; AL = NUMBER TRANSFERRED
   971                              <1> RWV_BAC:				; BAD DMA ERROR ENTRY
   972                              <1> 	; 06/08/2022
   973                              <1> 	;push	eax			; SAVE NUMBER TRANSFERRED
   974                              <1> 	;call	XLAT_OLD		; TRANSLATE STATE TO COMPATIBLE MODE
   975                              <1> 	;pop	eax			; RESTORE NUMBER TRANSFERRED
   976                              <1> 	;call	SETUP_END		; VARIOUS CLEANUPS
   977                              <1> 	;retn
   978                              <1> 
   979                              <1> ;-------------------------------------------------------------------------------
   980                              <1> ; SETUP_END
   981                              <1> ;	RESTORES @MOTOR_COUNT TO PARAMETER PROVIDED IN TABLE 
   982                              <1> ;	AND LOADS @DSKETTE_STATUS TO AH, AND SETS CY.
   983                              <1> ;
   984                              <1> ; ON EXIT:
   985                              <1> ;	AH, @DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
   986                              <1> ;-------------------------------------------------------------------------------
   987                              <1> SETUP_END:
   988                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
   989                              <1> 	;mov	dl, 2			; GET THE MOTOR WAIT PARAMETER
   990                              <1> 	;push	ax			; SAVE NUMBER TRANSFERRED
   991                              <1> 	; 11/04/2021
   992 00004406 50                  <1> 	push	eax
   993                              <1> 	; 06/08/2022
   994 00004407 B002                <1> 	mov	al, 2			; GET THE MOTOR WAIT PARAMETER		
   995 00004409 E888070000          <1> 	call	GET_PARM
   996 0000440E 8825[CF770100]      <1> 	mov	[MOTOR_COUNT], ah	; STORE UPON RETURN
   997                              <1> 	;pop	ax			; RESTORE NUMBER TRANSFERRED
   998                              <1> 	; 11/04/2021
   999 00004414 58                  <1> 	pop	eax
  1000 00004415 8A25[D0770100]      <1> 	mov	ah, [DSKETTE_STATUS]	; GET STATUS OF OPERATION
  1001 0000441B 08E4                <1> 	or	ah, ah			; CHECK FOR ERROR
  1002 0000441D 7403                <1> 	jz	short NUN_ERR		; NO ERROR
  1003 0000441F 30C0                <1> 	xor	al, al			; CLEAR NUMBER RETURNED
  1004                              <1> 	; 06/08/2022
  1005 00004421 F9                  <1> 	stc
  1006                              <1> NUN_ERR: 
  1007                              <1> 	;cmp	ah, 1			; SET THE CARRY FLAG TO INDICATE
  1008                              <1> 	;cmc				; SUCCESS OR FAILURE
  1009 00004422 C3                  <1> 	retn
  1010                              <1> 
  1011                              <1> ;-------------------------------------------------------------------------------
  1012                              <1> ; DISK_VERF	(AH = 04H)
  1013                              <1> ;	DISKETTE VERIFY.
  1014                              <1> ;
  1015                              <1> ; ON ENTRY:	DI	: DRIVE #
  1016                              <1> ;		SI-HI	: HEAD #
  1017                              <1> ;		SI-LOW	: # OF SECTORS
  1018                              <1> ;		ES	: BUFFER SEGMENT
  1019                              <1> ;		[BP]	: SECTOR #
  1020                              <1> ;		[BP+1]	: TRACK #
  1021                              <1> ;		[BP+2]	: BUFFER OFFSET
  1022                              <1> ;
  1023                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
  1024                              <1> ;-------------------------------------------------------------------------------
  1025                              <1> DSK_VERF:
  1026 00004423 8025[CE770100]7F    <1> 	and	byte [MOTOR_STATUS], 01111111b ; INDICATE A READ OPERATION
  1027 0000442A 66B842E6            <1> 	mov	ax, 0E642h		; AX = NEC COMMAND, DMA COMMAND
  1028                              <1> 	;call	RD_WR_VF		; COMMON READ/WRITE/VERIFY
  1029                              <1> 	;retn
  1030                              <1> 	; 06/08/2022
  1031 0000442E E9F3FEFFFF          <1> 	jmp	RD_WR_VF
  1032                              <1> 
  1033                              <1> ;-------------------------------------------------------------------------------
  1034                              <1> ; DISK_FORMAT	(AH = 05H)
  1035                              <1> ;	DISKETTE FORMAT.
  1036                              <1> ;
  1037                              <1> ; ON ENTRY:	DI	: DRIVE #
  1038                              <1> ;		SI-HI	: HEAD #
  1039                              <1> ;		SI-LOW	: # OF SECTORS
  1040                              <1> ;		ES	: BUFFER SEGMENT
  1041                              <1> ;		[BP]	: SECTOR #
  1042                              <1> ;		[BP+1]	: TRACK #
  1043                              <1> ;		[BP+2]	: BUFFER OFFSET
  1044                              <1> ;		@DISK_POINTER POINTS TO THE PARAMETER TABLE OF THIS DRIVE
  1045                              <1> ;
  1046                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
  1047                              <1> ;-------------------------------------------------------------------------------
  1048                              <1> DSK_FORMAT:
  1049                              <1> 	; 11/08/2022
  1050                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  1051 00004433 E8F7020000          <1> 	call	XLAT_NEW		; TRANSLATE STATE TO PRESENT ARCH.
  1052 00004438 E89F030000          <1> 	call	FMT_INIT		; ESTABLISH STATE IF UNESTABLISHED
  1053 0000443D 800D[CE770100]80    <1> 	or	byte [MOTOR_STATUS], 10000000b ; INDICATE WRITE OPERATION
  1054 00004444 E8E7030000          <1> 	call	MED_CHANGE		; CHECK MEDIA CHANGE AND RESET IF SO
  1055 00004449 7261                <1>         jc      short FM_DON            ; MEDIA CHANGED, SKIP
  1056 0000444B E896020000          <1> 	call	SEND_SPEC		; SEND SPECIFY COMMAND TO NEC
  1057 00004450 E848040000          <1> 	call	CHK_LASTRATE		; ZF=1 ATTEMPT RATE IS SAME AS LAST RATE
  1058 00004455 7405                <1>         jz      short FM_WR             ; YES, SKIP SPECIFY COMMAND
  1059 00004457 E821040000          <1> 	call	SEND_RATE		; SEND DATA RATE TO CONTROLLER
  1060                              <1> FM_WR:
  1061 0000445C E8C8040000          <1> 	call	FMTDMA_SET		; SET UP THE DMA FOR FORMAT
  1062 00004461 7249                <1>         jc      short FM_DON            ; RETURN WITH ERROR
  1063 00004463 B44D                <1> 	mov	ah, 04Dh		; ESTABLISH THE FORMAT COMMAND
  1064                              <1> 	; 11/08/2022
  1065 00004465 8B5C2418            <1> 	mov	ebx, [esp+24] ; ECX
  1066 00004469 E8D8040000          <1> 	call	NEC_INIT		; INITIALIZE THE NEC
  1067 0000446E 723C                <1> 	jc	short FM_DON            ; ERROR - EXIT
  1068 00004470 B8[AC440000]        <1>         mov     eax, FM_DON             ; LOAD ERROR ADDRESS
  1069 00004475 50                  <1> 	push	eax			; PUSH NEC_OUT ERROR RETURN
  1070                              <1> 	;mov	dl, 3			; BYTES/SECTOR VALUE TO NEC
  1071                              <1> 	; 06/08/2022
  1072 00004476 B003                <1> 	mov	al, 3
  1073 00004478 E819070000          <1> 	call	GET_PARM
  1074 0000447D E80A080000          <1> 	call	NEC_OUTPUT
  1075                              <1> 	;mov	dl, 4			; SECTORS/TRACK VALUE TO NEC
  1076                              <1> 	; 06/08/2022
  1077 00004482 B004                <1> 	mov	al, 4
  1078 00004484 E80D070000          <1> 	call	GET_PARM
  1079 00004489 E8FE070000          <1> 	call	NEC_OUTPUT
  1080                              <1> 	;mov	dl, 7			; GAP LENGTH VALUE TO NEC
  1081                              <1> 	; 06/08/2022
  1082 0000448E B007                <1> 	mov	al, 7
  1083 00004490 E801070000          <1> 	call	GET_PARM
  1084 00004495 E8F2070000          <1> 	call	NEC_OUTPUT
  1085                              <1> 	;mov	dl, 8			; FILLER BYTE TO NEC
  1086                              <1> 	; 06/08/2022
  1087 0000449A B008                <1> 	mov	al, 8
  1088 0000449C E8F5060000          <1> 	call	GET_PARM
  1089 000044A1 E8E6070000          <1> 	call	NEC_OUTPUT
  1090 000044A6 58                  <1> 	pop	eax			; THROW AWAY ERROR
  1091 000044A7 E815050000          <1> 	call	NEC_TERM		; TERMINATE, RECEIVE STATUS, ETC,
  1092                              <1> FM_DON:
  1093                              <1> 	; 06/08/2022
  1094                              <1> 	;call	XLAT_OLD		; TRANSLATE STATE TO COMPATIBLE MODE
  1095                              <1> 	; 06/08/2022
  1096 000044AC E953FEFFFF          <1> 	jmp	SETUP_END_X
  1097                              <1> 	;call	SETUP_END		; VARIOUS CLEANUPS
  1098                              <1> 	;; 06/08/2022
  1099                              <1> 	;mov	ebx, esi		; GET SAVED AL TO BL
  1100                              <1> 	;mov	al, bl			; PUT BACK FOR RETURN
  1101                              <1> 	;retn
  1102                              <1> 
  1103                              <1> ;-------------------------------------------------------------------------------
  1104                              <1> ; FNC_ERR
  1105                              <1> ;	INVALID FUNCTION REQUESTED OR INVALID DRIVE: 
  1106                              <1> ;	SET BAD COMMAND IN STATUS.
  1107                              <1> ;
  1108                              <1> ; ON EXIT: 	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
  1109                              <1> ;-------------------------------------------------------------------------------
  1110                              <1> FNC_ERR:				; INVALID FUNCTION REQUEST
  1111                              <1> 	;mov	ax, si
  1112                              <1> 	; 06/08/2022
  1113 000044B1 89F0                <1> 	mov	eax, esi		; RESTORE AL
  1114 000044B3 B401                <1> 	mov	ah, BAD_CMD		; SET BAD COMMAND ERROR
  1115 000044B5 8825[D0770100]      <1> 	mov	[DSKETTE_STATUS], ah	; STORE IN DATA AREA
  1116 000044BB F9                  <1> 	stc				; SET CARRY INDICATING ERROR
  1117 000044BC C3                  <1> 	retn
  1118                              <1> 
  1119                              <1> ; 06/08/2022 - TRDOS 386 Kernel v2.0.5
  1120                              <1> ; 30/08/2020
  1121                              <1> ; 29/08/2020
  1122                              <1> ; 01/06/2016
  1123                              <1> ; 28/05/2016
  1124                              <1> ; 27/05/2016 - TRDOS 386 (TRDOS v.2.0)
  1125                              <1> ;-------------------------------------------------------------------------------
  1126                              <1> ; DISK_PARMS	(AH = 08H)	
  1127                              <1> ;	READ DRIVE PARAMETERS.
  1128                              <1> ;
  1129                              <1> ; ON ENTRY:	DI : DRIVE #
  1130                              <1> ;		; 27/05/2016
  1131                              <1> ;		EBX = Buffer Address for floppy disk parameters table (16 bytes)
  1132                              <1> ;
  1133                              <1> ; ON EXIT:	CL/[BP]   = BITS 7 & 6 HI 2 BITS OF MAX CYLINDER
  1134                              <1> ;		            BITS 0-5 MAX SECTORS/TRACK
  1135                              <1> ;		CH/[BP+1] = LOW 8 BITS OF MAX CYLINDER
  1136                              <1> ;		BL/[BP+2] = BITS 7-4 = 0
  1137                              <1> ;		            BITS 3-0 = VALID CMOS DRIVE TYPE
  1138                              <1> ;		BH/[BP+3] = 0
  1139                              <1> ;		DL/[BP+4] = # DRIVES INSTALLED (VALUE CHECKED)
  1140                              <1> ;		DH/[BP+5] = MAX HEAD #
  1141                              <1> ;	     ** 27/05/2016 - TRDOS 386 (TRDOS v2.0) **	
  1142                              <1> ;            ** EBX = Buffer address for floppy disk parameters table **
  1143                              <1> ;		;DI/[BP+6] = OFFSET TO DISK_BASE
  1144                              <1> ;		;ES        = SEGMENT OF DISK_BASE
  1145                              <1> ;
  1146                              <1> ;		AX        = 0
  1147                              <1> ;
  1148                              <1> ;		NOTE : THE ABOVE INFORMATION IS STORED IN THE USERS STACK AT
  1149                              <1> ;		       THE LOCATIONS WHERE THE MAIN ROUTINE WILL POP THEM
  1150                              <1> ;		       INTO THE APPROPRIATE REGISTERS BEFORE RETURNING TO THE
  1151                              <1> ;		       CALLER.
  1152                              <1> ;-------------------------------------------------------------------------------
  1153                              <1> DSK_PARMS:
  1154                              <1> 	; 09/08/2022
  1155                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  1156                              <1> 	;
  1157                              <1> 	; Registers on stack:
  1158                              <1> 	;    ebx = esp+28
  1159                              <1> 	;    ecx = esp+24
  1160                              <1> 	;    edx = esp+20
  1161                              <1> 	;    esi = esp+16
  1162                              <1> 	;    edi = esp+12
  1163                              <1> 	;    return address from DSKETTE_IO_1 = esp+8
  1164                              <1> 	;    ebp = esp+4
  1165                              <1> 	;    return address from DSK_PARMS = esp
  1166                              <1> 	;
  1167                              <1> 	; INPUT:
  1168                              <1> 	;   ebp = buffer address
  1169                              <1> 	;   edi = drive number (0 or 1)
  1170                              <1> 	
  1171                              <1> 	; OUTPUT:
  1172                              <1> 	;   ebx = [esp+28] ((BL = cmos type, BH = 0))
  1173                              <1> 	;   ecx = [esp+24] ((CL = sectors per track, CH = tracks - 1))
  1174                              <1> 	;   edx = [esp+20] ((DL = floppy drive count, DH = heads - 1))
  1175                              <1> 	;   user's buffer = FDPT table
  1176                              <1> 			 
  1177 000044BD E86D020000          <1> 	call	XLAT_NEW		; TRANSLATE STATE TO PRESENT ARCH,
  1178                              <1>      	
  1179                              <1> 	;;mov	word [bp+2], 0		; DRIVE TYPE = 0
  1180                              <1>      	;;mov	ax, [EQUIP_FLAG]	; LOAD EQUIPMENT FLAG FOR # DISKETTES
  1181                              <1>      	;;and	al, 11000001b		; KEEP DISKETTE DRIVE BITS
  1182                              <1>      	;;mov	dl, 2			; DISKETTE DRIVES = 2
  1183                              <1>      	;;cmp	al, 01000001b		; 2 DRIVES INSTALLED ?
  1184                              <1>      	;;jz	short STO_DL		; IF YES JUMP
  1185                              <1>      	;;dec	dl			; DISKETTE DRIVES = 1
  1186                              <1>      	;;cmp	al, 00000001b		; 1 DRIVE INSTALLED ?
  1187                              <1>      	;;jnz	short NON_DRV		; IF NO JUMP
  1188                              <1> 	
  1189 000044C2 29D2                <1> 	sub	edx, edx
  1190 000044C4 66A1[7C650000]      <1> 	mov     ax, [fd0_type]
  1191 000044CA 6621C0              <1> 	and     ax, ax
  1192 000044CD 747C                <1>         jz      short NON_DRV
  1193 000044CF FEC2                <1> 	inc     dl
  1194 000044D1 20E4                <1> 	and     ah, ah
  1195 000044D3 7402                <1> 	jz      short STO_DL
  1196 000044D5 FEC2                <1> 	inc     dl
  1197                              <1> STO_DL:
  1198                              <1> 	; 30/08/2020
  1199                              <1> 	;cmp	dx, di
  1200                              <1> 	; 06/08/2022
  1201 000044D7 39FA                <1> 	cmp	edx, edi
  1202 000044D9 7670                <1> 	jna	short NON_DRV
  1203                              <1> 	;
  1204                              <1> 	;;mov	[bp+4], dl		; STORE NUMBER OF DRIVES
  1205                              <1> 	;mov	[ebp+8], edx ; 20/02/2015	 	
  1206                              <1> 
  1207                              <1> 	; 06/08/2022
  1208 000044DB FEC6                <1> 	inc	dh ; number of heads - 1 
  1209                              <1> 	; dh = 1
  1210                              <1> 	; dl = number of floppy/diskette drives (DL)
  1211 000044DD 89542414            <1> 	mov	[esp+20], edx
  1212                              <1> 
  1213                              <1> 	; 11/04/2021
  1214                              <1> 	;cmp	di, 1			; CHECK FOR VALID DRIVE
  1215                              <1> 	;;ja	short NON_DRV1		; DRIVE INVALID
  1216                              <1> 	;ja	NON_DRV1 ; 29/08/2020
  1217                              <1> 	;	
  1218                              <1> 	;;mov	byte [bp+5], 1		; MAXIMUM HEAD NUMBER =	1
  1219                              <1> 	; 06/08/2022
  1220                              <1> 	;mov	byte [ebp+9], 1 ; 20/02/2015	
  1221                              <1> 	
  1222 000044E1 E8A7060000          <1> 	call	CMOS_TYPE		; RETURN DRIVE TYPE IN AL
  1223                              <1> 	;;20/02/2015
  1224                              <1> 	;;jc	short CHK_EST		; IF CMOS BAD CHECKSUM ESTABLISHED
  1225                              <1> 	;;or	al, al			; TEST FOR NO DRIVE TYPE
  1226 000044E6 740F                <1> 	jz	short CHK_EST		; JUMP IF SO
  1227 000044E8 E8DC010000          <1> 	call	DR_TYPE_CHECK		; RTN CS:BX = MEDIA/DRIVE PARAM TBL
  1228 000044ED 7208                <1> 	jc	short CHK_EST		; TYPE NOT IN TABLE (POSSIBLE BAD CMOS)
  1229                              <1> 	;mov	[bp+2], al		; STORE VALID CMOS DRIVE TYPE
  1230                              <1>         ;mov	[ebp+4], al ; 06/02/2015
  1231 000044EF 8A4B04              <1> 	mov	cl, [ebx+MD.SEC_TRK]	; GET SECTOR/TRACK
  1232 000044F2 8A6B0B              <1>         mov	ch, [ebx+MD.MAX_TRK]	; GET MAX. TRACK NUMBER
  1233 000044F5 EB36                <1> 	jmp	short STO_CX		; CMOS GOOD, USE CMOS
  1234                              <1> CHK_EST:
  1235 000044F7 8AA7[DB770100]      <1> 	mov	ah, [DSK_STATE+edi]	; LOAD STATE FOR THIS DRIVE
  1236 000044FD F6C410              <1> 	test	ah, MED_DET		; CHECK FOR ESTABLISHED STATE
  1237 00004500 744D                <1> 	jz	short NON_DRV1		; CMOS BAD/INVALID OR UNESTABLISHED
  1238                              <1> USE_EST:
  1239 00004502 80E4C0              <1> 	and	ah, RATE_MSK		; ISOLATE STATE
  1240 00004505 80FC80              <1> 	cmp	ah, RATE_250		; RATE 250 ?
  1241 00004508 755C                <1> 	jne	short USE_EST2		; NO, GO CHECK OTHER RATE
  1242                              <1> 
  1243                              <1> ;-----	DATA RATE IS 250 KBS, TRY 360 KB TABLE FIRST
  1244                              <1> 
  1245 0000450A B001                <1> 	mov	al, 1			; DRIVE TYPE 1 (360KB)
  1246 0000450C E8B8010000          <1> 	call	DR_TYPE_CHECK		; RTN CS:BX = MEDIA/DRIVE PARAM TBL
  1247 00004511 8A4B04              <1>         mov	cl, [ebx+MD.SEC_TRK]	; GET SECTOR/TRACK
  1248 00004514 8A6B0B              <1>         mov	ch, [ebx+MD.MAX_TRK]	; GET MAX. TRACK NUMBER
  1249 00004517 F687[DB770100]01    <1> 	test	byte [DSK_STATE+edi], TRK_CAPA ; 80 TRACK ?
  1250 0000451E 740D                <1> 	jz	short STO_CX		; MUST BE 360KB DRIVE 
  1251                              <1> 
  1252                              <1> ;-----	IT IS 1.44 MB DRIVE
  1253                              <1> 
  1254                              <1> PARM144:
  1255 00004520 B004                <1> 	mov	al, 4			; DRIVE TYPE 4 (1.44MB)
  1256 00004522 E8A2010000          <1> 	call	DR_TYPE_CHECK		; RTN CS:BX = MEDIA/DRIVE PARAM TBL
  1257 00004527 8A4B04              <1> 	mov	cl, [ebx+MD.SEC_TRK]	; GET SECTOR/TRACK
  1258 0000452A 8A6B0B              <1> 	mov	ch, [ebx+MD.MAX_TRK]	; GET MAX. TRACK NUMBER
  1259                              <1> STO_CX:
  1260                              <1> 	;mov	[ebp], ecx		; SAVE POINTER IN STACK FOR RETURN
  1261                              <1> 	; 06/08/2022
  1262 0000452D 894C2418            <1> 	mov	[esp+24], ecx ; spt (cl), tracks - 1 (ch)
  1263                              <1> ES_DI:
  1264                              <1> 	;mov	[bp+6], bx		; ADDRESS OF MEDIA/DRIVE PARM TABLE 
  1265                              <1> 	;mov	[ebp+12], ebx ; 06/02/2015
  1266                              <1> 	;mov	ax, cs			; SEGMENT MEDIA/DRIVE PARAMETER TABLE
  1267                              <1> 	;mov	es, ax			; ES IS SEGMENT OF TABLE
  1268                              <1> 	;
  1269                              <1> 	; 28/05/2016
  1270                              <1> 	; 27/05/2016
  1271                              <1> 	; return floppy disk parameters table to user
  1272                              <1> 	; in user's buffer, which is pointed by EBX
  1273                              <1> 	
  1274                              <1> 	; 09/08/2022
  1275                              <1> 	;movzx	eax, al
  1276 00004531 29C9                <1> 	sub	ecx, ecx
  1277 00004533 88C1                <1> 	mov	cl, al
  1278                              <1> 	;;mov	[ebp+4], eax  ; ebx	; drive type (for floppy drives)
  1279                              <1> 	; 06/08/2022
  1280                              <1> 	;mov	[esp+28], eax ; drive type	
  1281                              <1> 	; 09/08/2022
  1282 00004535 894C241C            <1> 	mov	[esp+28], ecx ; drive type
  1283                              <1> 
  1284                              <1> 	; 06/08/2022
  1285                              <1> 	;push	edi
  1286                              <1> 	
  1287                              <1> 	;mov	edi, [ebp+4]  		; ebx (input), user's buffer address
  1288                              <1> 	; 06/08/2022
  1289                              <1> 	;mov	edi, ebp ; [esp+28] ; user's buffer address
  1290                              <1> 	;
  1291                              <1> 	;; 29/08/2020
  1292                              <1> 	;or	edi, edi
  1293                              <1> 	;jz	short no_copy_fdpt
  1294                              <1> 	; 06/08/2022
  1295 00004539 09ED                <1> 	or	ebp, ebp ; [esp+28] = ebx ; user's buffer address if > 0
  1296 0000453B 740B                <1> 	jz	short DP_OUT
  1297                              <1> 	; 06/08/2022
  1298                              <1> 	;push	edi
  1299 0000453D 89EF                <1> 	mov	edi, ebp
  1300                              <1> 	;
  1301                              <1> 	; 06/08/2022
  1302                              <1> 	; 01/06/2016 (Int 33h, disk type return for floppy disks, in BL)
  1303                              <1> 	;mov	[user_buffer], eax	; 01/06/2016 (overwrite ebx return value)
  1304                              <1> 	
  1305                              <1> 	;(Int 33h, Function 08h will replace user's buffer addr with disk type!)
  1306                              <1> 	;
  1307 0000453F 89DE                <1> 	mov	esi, ebx 		; floppy disk parameter table (16 bytes)
  1308                              <1> 	;mov	ecx, 16 ; 16 bytes
  1309                              <1>         ; 09/08/2022
  1310                              <1> 	; ecx < 256
  1311                              <1> 	; 06/08/2022
  1312                              <1> 	;sub	ecx, ecx
  1313 00004541 B110                <1> 	mov	cl, 16
  1314 00004543 E861C80000          <1> 	call    transfer_to_user_buffer ; trdosk6.s (16/05/2016)
  1315                              <1> no_copy_fdpt:
  1316                              <1> 	; 06/08/2022
  1317                              <1> 	;pop	edi	
  1318                              <1> DP_OUT:
  1319                              <1> 	; 06/08/2022
  1320                              <1> 	;call	XLAT_OLD		; TRANSLATE STATE TO COMPATIBLE MODE
  1321                              <1> 	;xor	ax, ax			; CLEAR
  1322                              <1> 	; 06/08/2022
  1323 00004548 31C0                <1> 	xor	eax, eax
  1324                              <1> 	;clc
  1325 0000454A C3                  <1> 	retn
  1326                              <1> 
  1327                              <1> ;-----	NO DRIVE PRESENT HANDLER
  1328                              <1> 
  1329                              <1> NON_DRV:
  1330                              <1> 	;;mov	byte [bp+4], 0		; CLEAR NUMBER OF DRIVES
  1331                              <1> 	;mov	[ebp+8], edx ; 0 ; 20/02/2015
  1332                              <1> 	; 06/08/2022
  1333 0000454B 89542414            <1> 	mov	[esp+20], edx ; 0 ; number of floppy drives and heads are 0
  1334                              <1> NON_DRV1:
  1335 0000454F 6681FF8000          <1> 	cmp	di, 80h			; CHECK FOR FIXED MEDIA TYPE REQUEST
  1336 00004554 7206                <1> 	jb	short NON_DRV2		; CONTINUE IF NOT REQUEST FALL THROUGH
  1337                              <1> 
  1338                              <1> ;-----	FIXED DISK REQUEST FALL THROUGH ERROR
  1339                              <1> 	
  1340                              <1> 	; 06/08/2022
  1341                              <1> 	;call	XLAT_OLD		; ELSE TRANSLATE TO COMPATIBLE MODE
  1342                              <1> 	;mov	ax, si			; RESTORE AL
  1343                              <1> 	; 06/08/2022
  1344 00004556 89F0                <1> 	mov	eax, esi
  1345 00004558 B401                <1> 	mov	ah, BAD_CMD		; SET BAD COMMAND ERROR
  1346 0000455A F9                  <1> 	stc
  1347 0000455B C3                  <1> 	retn
  1348                              <1> 
  1349                              <1> NON_DRV2:
  1350                              <1> 	;xor	ax, ax			; CLEAR PARMS IF NO DRIVES OR CMOS BAD
  1351 0000455C 31C0                <1> 	xor	eax, eax	
  1352                              <1> 	;mov	[ebp], ax		; TRACKS, SECTORS/TRACK = 0
  1353                              <1> 	; 06/08/2022
  1354 0000455E 89442418            <1> 	mov	[esp+24], eax ; spt and max. track number is 0
  1355                              <1> 
  1356                              <1> 	;;mov	[bp+5], ah		; HEAD = 0
  1357                              <1> 	; 06/08/2022
  1358                              <1> 	;mov	[ebp+9], ah ; 06/02/2015
  1359                              <1> 	; 06/08/2022
  1360                              <1> 	;mov	[esp+21], ah ; 0	
  1361                              <1> 
  1362                              <1> 	;;mov	[bp+6], ax		; OFFSET TO DISK_BASE = 0
  1363                              <1> 	; 06/08/2022
  1364                              <1> 	;mov	[ebp+12], eax
  1365                              <1> 	
  1366                              <1> 	;;mov	es, ax			; ES IS SEGMENT OF TABLE
  1367                              <1> 	;jmp	short DP_OUT
  1368                              <1> 
  1369                              <1> 	; 06/08/2022
  1370                              <1> 	; 30/08/2020
  1371                              <1> 	;call	XLAT_OLD
  1372                              <1> 	;;mov	ah, NOT_RDY ; drive not ready
  1373 00004562 B407                <1> 	mov	ah, INIT_FAIL ; DRIVE PARAMETER ACTIVITY FAILED 
  1374 00004564 F9                  <1> 	stc	; cf -> 1, ah = 'drive not ready' error code
  1375 00004565 C3                  <1> 	retn		
  1376                              <1> 
  1377                              <1> ;-----	DATA RATE IS EITHER 300 KBS OR 500 KBS, TRY 1.2 MB TABLE FIRST
  1378                              <1> 
  1379                              <1> USE_EST2:
  1380 00004566 B002                <1> 	mov	al, 2			; DRIVE TYPE 2 (1.2MB)
  1381 00004568 E85C010000          <1> 	call	DR_TYPE_CHECK		; RTN CS:BX = MEDIA/DRIVE PARAM TBL
  1382 0000456D 8A4B04              <1>         mov     cl, [ebx+MD.SEC_TRK]    ; GET SECTOR/TRACK
  1383 00004570 8A6B0B              <1>         mov     ch, [ebx+MD.MAX_TRK]    ; GET MAX. TRACK NUMBER
  1384 00004573 80FC40              <1> 	cmp	ah, RATE_300		; RATE 300 ?
  1385 00004576 74B5                <1> 	jz	short STO_CX		; MUST BE 1.2MB DRIVE
  1386 00004578 EBA6                <1> 	jmp	short PARM144		; ELSE, IT IS 1.44MB DRIVE 
  1387                              <1> 
  1388                              <1> ; 30/08/2020
  1389                              <1> 
  1390                              <1> ;-------------------------------------------------------------------------------
  1391                              <1> ; DISK_TYPE (AH = 15H)	
  1392                              <1> ;	THIS ROUTINE RETURNS THE TYPE OF MEDIA INSTALLED.
  1393                              <1> ;
  1394                              <1> ;  ON ENTRY:	DI = DRIVE #
  1395                              <1> ;
  1396                              <1> ;  ON EXIT:	AH = DRIVE TYPE, CY=0
  1397                              <1> ;-------------------------------------------------------------------------------
  1398                              <1> DSK_TYPE:
  1399                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  1400 0000457A E8B0010000          <1> 	call	XLAT_NEW		; TRANSLATE STATE TO PRESENT ARCH.
  1401 0000457F 8A87[DB770100]      <1> 	mov	al, [DSK_STATE+edi]	; GET PRESENT STATE INFORMATION
  1402 00004585 08C0                <1> 	or	al, al			; CHECK FOR NO DRIVE
  1403 00004587 740D                <1> 	jz	short NO_DRV
  1404 00004589 B401                <1> 	mov	ah, NOCHGLN		; NO CHANGE LINE FOR 40 TRACK DRIVE
  1405 0000458B A801                <1> 	test	al, TRK_CAPA		; IS THIS DRIVE AN 80 TRACK DRIVE?
  1406 0000458D 7402                <1> 	jz	short DT_BACK		; IF NO JUMP
  1407 0000458F B402                <1> 	mov	ah, CHGLN		; CHANGE LINE FOR 80 TRACK DRIVE
  1408                              <1> DT_BACK:
  1409                              <1> 	; 06/08/2022
  1410                              <1> 	;;push	ax			; SAVE RETURN VALUE
  1411                              <1> 	; 11/04/2021
  1412                              <1> 	;push	eax
  1413                              <1> 	;call	XLAT_OLD		; TRANSLATE STATE TO COMPATIBLE MODE
  1414                              <1> 	;; 11/04/2021
  1415                              <1> 	;pop	eax
  1416                              <1> 	;; pop	ax
  1417                              <1> 	;clc				; NO ERROR
  1418                              <1> 	;mov	bx, si			; GET SAVED AL TO BL
  1419                              <1> 	; 06/08/2022
  1420 00004591 89F3                <1> 	mov	ebx, esi
  1421 00004593 88D8                <1> 	mov	al, bl			; PUT BACK FOR RETURN
  1422 00004595 C3                  <1> 	retn
  1423                              <1> NO_DRV:	
  1424                              <1> 	;xor	ah, ah			; NO DRIVE PRESENT OR UNKNOWN
  1425                              <1> 	;jmp	short DT_BACK
  1426                              <1> 	
  1427                              <1> 	; 06/08/2022
  1428                              <1> 	; 30/08/2020
  1429                              <1> 	;call	XLAT_OLD
  1430 00004596 29C0                <1> 	sub	eax, eax
  1431 00004598 F9                  <1> 	stc	; cf = 1 -> drive not ready, ah = 0 (disk type = 0)
  1432 00004599 C3                  <1> 	retn
  1433                              <1> 
  1434                              <1> ;-------------------------------------------------------------------------------
  1435                              <1> ; DISK_CHANGE	(AH = 16H)
  1436                              <1> ;	THIS ROUTINE RETURNS THE STATE OF THE DISK CHANGE LINE.
  1437                              <1> ;
  1438                              <1> ; ON ENTRY:	DI = DRIVE #
  1439                              <1> ;
  1440                              <1> ; ON EXIT:	AH = @DSKETTE_STATUS
  1441                              <1> ;		     00 - DISK CHANGE LINE INACTIVE, CY = 0
  1442                              <1> ;		     06 - DISK CHANGE LINE ACTIVE, CY = 1
  1443                              <1> ;-------------------------------------------------------------------------------
  1444                              <1> DSK_CHANGE:
  1445                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  1446 0000459A E890010000          <1> 	call	XLAT_NEW		; TRANSLATE STATE TO PRESENT ARCH.
  1447 0000459F 8A87[DB770100]      <1> 	mov	al, [DSK_STATE+edi]	; GET MEDIA STATE INFORMATION
  1448 000045A5 08C0                <1> 	or	al, al			; DRIVE PRESENT ?
  1449 000045A7 7417                <1> 	jz	short DC_NON		; JUMP IF NO DRIVE
  1450 000045A9 A801                <1> 	test	al, TRK_CAPA		; 80 TRACK DRIVE ?
  1451 000045AB 7407                <1> 	jz	short SETIT		; IF SO , CHECK CHANGE LINE
  1452                              <1> DC0:
  1453 000045AD E86B080000          <1>         call    READ_DSKCHNG            ; GO CHECK STATE OF DISK CHANGE LINE
  1454 000045B2 7407                <1> 	jz	short FINIS		; CHANGE LINE NOT ACTIVE
  1455                              <1> SETIT:	
  1456 000045B4 C605[D0770100]06    <1> 	mov	byte [DSKETTE_STATUS], MEDIA_CHANGE ; INDICATE MEDIA REMOVED
  1457                              <1> 
  1458                              <1> FINIS:	; 06/08/2022
  1459                              <1> 	;call	XLAT_OLD		; TRANSLATE STATE TO COMPATIBLE MODE
  1460                              <1> 	; 06/08/2022
  1461 000045BB E944FDFFFF          <1> 	jmp	SETUP_END_X
  1462                              <1> 	;call	SETUP_END		; VARIOUS CLEANUPS
  1463                              <1> 	;; 06/08/2022
  1464                              <1> 	;mov	ebx, esi		; GET SAVED AL TO BL
  1465                              <1> 	;mov	al, bl			; PUT BACK FOR RETURN
  1466                              <1> 	;retn
  1467                              <1> DC_NON:
  1468 000045C0 800D[D0770100]80    <1> 	or	byte [DSKETTE_STATUS], TIME_OUT ; SET TIMEOUT, NO DRIVE
  1469 000045C7 EBF2                <1> 	jmp	short FINIS
  1470                              <1> 
  1471                              <1> ;-------------------------------------------------------------------------------
  1472                              <1> ; FORMAT_SET	(AH = 17H)
  1473                              <1> ;	THIS ROUTINE IS USED TO ESTABLISH THE TYPE OF MEDIA TO BE USED
  1474                              <1> ;	FOR THE FOLLOWING FORMAT OPERATION.
  1475                              <1> ;
  1476                              <1> ; ON ENTRY:	SI LOW = DASD TYPE FOR FORMAT
  1477                              <1> ;		DI     = DRIVE #
  1478                              <1> ;
  1479                              <1> ; ON EXIT:	@DSKETTE_STATUS REFLECTS STATUS
  1480                              <1> ;		AH = @DSKETTE_STATUS
  1481                              <1> ;		CY = 1 IF ERROR
  1482                              <1> ;-------------------------------------------------------------------------------
  1483                              <1> FORMAT_SET:
  1484 000045C9 E861010000          <1> 	call	XLAT_NEW		; TRANSLATE STATE TO PRESENT ARCH.
  1485                              <1> 	;push	si			; SAVE DASD TYPE
  1486                              <1> 	; 11/04/2021
  1487 000045CE 56                  <1> 	push	esi
  1488                              <1> 	;mov	ax, si			; AH = ? , AL = DASD TYPE
  1489                              <1> 	;xor	ah, ah			; AH = 0 , AL = DASD TYPE
  1490                              <1> 	;mov	si, ax			; SI = DASD TYPE
  1491                              <1> 	; 11/04/2021
  1492 000045CF 89F0                <1> 	mov	eax, esi
  1493 000045D1 0FB6F0              <1> 	movzx	esi, al	
  1494 000045D4 80A7[DB770100]0F    <1> 	and	byte [DSK_STATE+edi], ~(MED_DET+DBL_STEP+RATE_MSK) ; CLEAR STATE
  1495                              <1> 	;dec	si			; CHECK FOR 320/360K MEDIA & DRIVE
  1496                              <1> 	; 11/04/2021
  1497 000045DB 4E                  <1> 	dec	esi
  1498 000045DC 7509                <1> 	jnz	short NOT_320		; BYPASS IF NOT
  1499 000045DE 808F[DB770100]90    <1> 	or	byte [DSK_STATE+edi], MED_DET+RATE_250 ; SET TO 320/360
  1500 000045E5 EB45                <1> 	jmp	short S0
  1501                              <1> 
  1502                              <1> NOT_320:
  1503 000045E7 E844020000          <1> 	call	MED_CHANGE		; CHECK FOR TIME_OUT
  1504 000045EC 803D[D0770100]80    <1> 	cmp	byte [DSKETTE_STATUS], TIME_OUT
  1505 000045F3 7437                <1> 	jz	short S0		; IF TIME OUT TELL CALLER
  1506                              <1> S3:
  1507                              <1> 	;dec	si			; CHECK FOR 320/360K IN 1.2M DRIVE
  1508                              <1> 	; 11/04/2021
  1509 000045F5 4E                  <1> 	dec	esi
  1510 000045F6 7509                <1> 	jnz	short NOT_320_12	; BYPASS IF NOT
  1511 000045F8 808F[DB770100]70    <1> 	OR	byte [DSK_STATE+edi], MED_DET+DBL_STEP+RATE_300 ; SET STATE
  1512 000045FF EB2B                <1> 	jmp	short S0
  1513                              <1> 
  1514                              <1> NOT_320_12:
  1515                              <1> 	;dec	si			; CHECK FOR 1.2M MEDIA IN 1.2M DRIVE
  1516                              <1> 	; 11/04/2021
  1517 00004601 4E                  <1> 	dec	esi
  1518 00004602 7509                <1> 	jnz	short NOT_12		; BYPASS IF NOT
  1519 00004604 808F[DB770100]10    <1> 	or	byte [DSK_STATE+edi], MED_DET+RATE_500 ; SET STATE VARIABLE
  1520 0000460B EB1F                <1> 	jmp	short S0		; RETURN TO CALLER
  1521                              <1> 
  1522                              <1> NOT_12:	
  1523                              <1> 	;dec	si			; CHECK FOR SET DASD TYPE 04
  1524                              <1> 	; 11/04/2021
  1525 0000460D 4E                  <1> 	dec	esi
  1526 0000460E 7525                <1> 	jnz	short FS_ERR		; BAD COMMAND EXIT IF NOT VALID TYPE
  1527                              <1> 
  1528 00004610 F687[DB770100]04    <1> 	test	byte [DSK_STATE+edi], DRV_DET ; DRIVE DETERMINED ?
  1529 00004617 740B                <1> 	jz	short ASSUME		; IF STILL NOT DETERMINED ASSUME
  1530 00004619 B050                <1> 	mov	al, MED_DET+RATE_300
  1531 0000461B F687[DB770100]02    <1>         test    byte [DSK_STATE+edi], FMT_CAPA ; MULTIPLE FORMAT CAPABILITY ?
  1532 00004622 7502                <1> 	jnz	short OR_IT_IN		; IF 1.2 M THEN DATA RATE 300
  1533                              <1> 
  1534                              <1> ASSUME:
  1535 00004624 B090                <1> 	mov	al, MED_DET+RATE_250	; SET UP
  1536                              <1> 
  1537                              <1> OR_IT_IN:
  1538 00004626 0887[DB770100]      <1> 	or	[DSK_STATE+edi], al	; OR IN THE CORRECT STATE
  1539                              <1> S0:
  1540                              <1> 	; 06/08/2022
  1541                              <1> 	;call	XLAT_OLD		; TRANSLATE STATE TO COMPATIBLE MODE
  1542 0000462C E8D5FDFFFF          <1> 	call	SETUP_END		; VARIOUS CLEANUPS
  1543                              <1> 	;pop	BX			; GET SAVED AL TO BL
  1544                              <1> 	; 11/04/2021
  1545 00004631 5B                  <1> 	pop	ebx
  1546 00004632 88D8                <1> 	mov	al, bl			; PUT BACK FOR RETURN
  1547 00004634 C3                  <1> 	retn
  1548                              <1> 
  1549                              <1> FS_ERR:
  1550 00004635 C605[D0770100]01    <1> 	mov	byte [DSKETTE_STATUS], BAD_CMD ; UNKNOWN STATE,BAD COMMAND
  1551 0000463C EBEE                <1> 	jmp	short S0
  1552                              <1> 
  1553                              <1> ;-------------------------------------------------------------------------------
  1554                              <1> ; SET_MEDIA	(AH = 18H)
  1555                              <1> ;	THIS ROUTINE SETS THE TYPE OF MEDIA AND DATA RATE 
  1556                              <1> ;	TO BE USED FOR THE FOLLOWING FORMAT OPERATION.
  1557                              <1> ;
  1558                              <1> ; ON ENTRY:
  1559                              <1> ;	[BP]	= SECTOR PER TRACK
  1560                              <1> ;	[BP+1]	= TRACK #
  1561                              <1> ;	DI	= DRIVE #
  1562                              <1> ;
  1563                              <1> ; ON EXIT:
  1564                              <1> ;	@DSKETTE_STATUS REFLECTS STATUS
  1565                              <1> ;	IF NO ERROR:
  1566                              <1> ;		AH = 0
  1567                              <1> ;		CY = 0
  1568                              <1> ;		ES = SEGMENT OF MEDIA/DRIVE PARAMETER TABLE
  1569                              <1> ;		DI/[BP+6] = OFFSET OF MEDIA/DRIVE PARAMETER TABLE
  1570                              <1> ;	IF ERROR:	
  1571                              <1> ;		AH = @DSKETTE_STATUS
  1572                              <1> ;		CY = 1
  1573                              <1> ;-------------------------------------------------------------------------------
  1574                              <1> SET_MEDIA:
  1575                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  1576 0000463E E8EC000000          <1> 	call	XLAT_NEW		; TRANSLATE STATE TO PRESENT ARCH.
  1577 00004643 F687[DB770100]01    <1>         test    byte [DSK_STATE+edi], TRK_CAPA ; CHECK FOR CHANGE LINE AVAILABLE
  1578 0000464A 7415                <1> 	jz	short SM_CMOS		; JUMP IF 40 TRACK DRIVE
  1579 0000464C E8DF010000          <1> 	call	MED_CHANGE		; RESET CHANGE LINE
  1580 00004651 803D[D0770100]80    <1> 	cmp	byte [DSKETTE_STATUS], TIME_OUT ; IF TIME OUT TELL CALLER
  1581 00004658 746A                <1> 	je	short SM_RTN
  1582 0000465A C605[D0770100]00    <1> 	mov	byte [DSKETTE_STATUS], 0 ; CLEAR STATUS
  1583                              <1> SM_CMOS:
  1584 00004661 E827050000          <1> 	call	CMOS_TYPE		; RETURN DRIVE TYPE IN (AL)
  1585                              <1> 	;;20/02/2015
  1586                              <1> 	;;jc	short MD_NOT_FND	; ERROR IN CMOS
  1587                              <1> 	;;or	al, al			; TEST FOR NO DRIVE
  1588 00004666 745C                <1> 	jz	short SM_RTN		; RETURN IF SO
  1589 00004668 E85C000000          <1> 	call	DR_TYPE_CHECK		; RTN CS:BX = MEDIA/DRIVE PARAM TBL
  1590 0000466D 7233                <1> 	jc	short MD_NOT_FND	; TYPE NOT IN TABLE (BAD CMOS)
  1591 0000466F 57                  <1> 	push	edi			; SAVE REG.
  1592 00004670 31DB                <1> 	xor	ebx, ebx		; BX = INDEX TO DR. TYPE TABLE
  1593 00004672 B906000000          <1> 	mov	ecx, DR_CNT		; CX = LOOP COUNT
  1594                              <1> DR_SEARCH:
  1595 00004677 8AA3[F8640000]      <1> 	mov	ah, [DR_TYPE+ebx]	; GET DRIVE TYPE
  1596 0000467D 80E47F              <1> 	and	ah, BIT7OFF		; MASK OUT MSB
  1597 00004680 38E0                <1> 	cmp	al, ah			; DRIVE TYPE MATCH ?
  1598 00004682 7518                <1> 	jne	short NXT_MD		; NO, CHECK NEXT DRIVE TYPE
  1599                              <1> DR_FND:
  1600 00004684 8BBB[F9640000]      <1> 	mov	edi, [DR_TYPE+ebx+1] 	; DI = MEDIA/DRIVE PARAM TABLE
  1601                              <1> MD_SEARCH:
  1602 0000468A 8A6704              <1>         mov	ah, [edi+MD.SEC_TRK]    ; GET SECTOR/TRACK
  1603                              <1> 	;cmp	[ebp], ah		; MATCH?
  1604                              <1> 	; 06/08/2022
  1605 0000468D 38642418            <1> 	cmp	[esp+24], ah  ; CL ; spt	
  1606 00004691 7509                <1> 	jne	short NXT_MD		; NO, CHECK NEXT MEDIA
  1607 00004693 8A670B              <1>         mov     ah, [edi+MD.MAX_TRK]    ; GET MAX. TRACK #
  1608                              <1> 	;cmp 	[ebp+1], ah		; MATCH?
  1609                              <1> 	; 06/08/2022
  1610 00004696 38642419            <1> 	cmp	[esp+25], ah  ; CH ; heads - 1
  1611 0000469A 740F                <1> 	je	short MD_FND		; YES, GO GET RATE
  1612                              <1> NXT_MD:
  1613                              <1> 	;add	bx, 3			; CHECK NEXT DRIVE TYPE
  1614 0000469C 83C305              <1>         add	ebx, 5 ; 18/02/2015
  1615 0000469F E2D6                <1> 	loop	DR_SEARCH
  1616 000046A1 5F                  <1> 	pop	edi			; RESTORE REG.
  1617                              <1> MD_NOT_FND:
  1618 000046A2 C605[D0770100]0C    <1> 	mov	byte [DSKETTE_STATUS], MED_NOT_FND ; ERROR, MEDIA TYPE NOT FOUND
  1619 000046A9 EB19                <1> 	jmp	short SM_RTN		; RETURN
  1620                              <1> MD_FND:
  1621 000046AB 8A470C              <1>         mov	al, [edi+MD.RATE]       ; GET RATE
  1622 000046AE 3C40                <1> 	cmp	al, RATE_300		; DOUBLE STEP REQUIRED FOR RATE 300
  1623 000046B0 7502                <1> 	jne	short MD_SET
  1624 000046B2 0C20                <1> 	or	al, DBL_STEP
  1625                              <1> MD_SET:
  1626                              <1> 	;;mov	[bp+6], di		; SAVE TABLE POINTER IN STACK
  1627                              <1> 	; 06/08/2022
  1628                              <1> 	;mov	[ebp+12], edi ; 18/02/2015
  1629                              <1> 	
  1630 000046B4 0C10                <1> 	or	al, MED_DET		; SET MEDIA ESTABLISHED
  1631 000046B6 5F                  <1> 	pop	edi
  1632 000046B7 80A7[DB770100]0F    <1> 	and	byte [DSK_STATE+edi], ~(MED_DET+DBL_STEP+RATE_MSK) ; CLEAR STATE
  1633 000046BE 0887[DB770100]      <1> 	or	[DSK_STATE+edi], al
  1634                              <1> 	;mov	ax, cs			; SEGMENT OF MEDIA/DRIVE PARAMETER TABLE
  1635                              <1> 	;mov	es, ax			; ES IS SEGMENT OF TABLE
  1636                              <1> SM_RTN:
  1637                              <1> 	; 06/08/2022
  1638                              <1> 	;call	XLAT_OLD		; TRANSLATE STATE TO COMPATIBLE MODE
  1639                              <1> 	;call	SETUP_END		; VARIOUS CLEANUPS
  1640                              <1> 	;retn
  1641                              <1> 	; 06/08/2022
  1642 000046C4 E93DFDFFFF          <1> 	jmp	SETUP_END
  1643                              <1> 
  1644                              <1> ;----------------------------------------------------------------
  1645                              <1> ; DR_TYPE_CHECK							:
  1646                              <1> ;	CHECK IF THE GIVEN DRIVE TYPE IN REGISTER (AL)		:
  1647                              <1> ;	IS SUPPORTED IN BIOS DRIVE TYPE TABLE			:
  1648                              <1> ; ON ENTRY:							:
  1649                              <1> ;	AL = DRIVE TYPE						:
  1650                              <1> ; ON EXIT:							:
  1651                              <1> ;	CY = 0 	DRIVE TYPE SUPPORTED				:
  1652                              <1> ;	     EBX = OFFSET TO MEDIA/DRIVE PARAMETER TABLE	:
  1653                              <1> ;	CY = 1	DRIVE TYPE NOT SUPPORTED 			:
  1654                              <1> ; REGISTERS ALTERED: EBX, AH ; 11/07/2022 			:
  1655                              <1> ;----------------------------------------------------------------
  1656                              <1> DR_TYPE_CHECK:
  1657                              <1> 	; 09/08/2022 - TRDOS 386 Kernel v2.0.5 
  1658                              <1> 	; 12/07/2022
  1659                              <1> 	; 11/07/2022
  1660                              <1> 	; 08/07/2022 - Retro UNIX 386 v1.1 (Kernel v0.2.1.5)
  1661                              <1> 	; 24/12/2021
  1662                              <1> 	;push	eax ; 11/07/2022
  1663                              <1> 	;push	ecx ; 08/07/2022
  1664                              <1> 	;xor	ebx,ebx			; EBX = INDEX TO DR_TYPE TABLE
  1665 000046C9 BB[F8640000]        <1> 	mov	ebx, DR_TYPE
  1666                              <1> 	;;mov	ecx, DR_CNT		; ECX = LOOP COUNT
  1667                              <1> 	;mov	cl, DR_CNT
  1668 000046CE B406                <1> 	mov	ah, DR_CNT ; 11/07/2022
  1669                              <1> TYPE_CHK:	
  1670                              <1> 	;;mov	ah, [DR_TYPE+ebx]	; GET DRIVE TYPE
  1671                              <1> 	;mov	ah, [ebx]
  1672                              <1> 	;cmp	al, ah			; DRIVE TYPE MATCH?
  1673 000046D0 3A03                <1> 	cmp	al, [ebx] ; 11/07/2022
  1674 000046D2 740E                <1> 	je	short DR_TYPE_VALID	; YES, RETURN WITH CARRY RESET
  1675                              <1> 	; 16/02/2015 (32 bit address modification)
  1676 000046D4 83C305              <1> 	add	ebx, 5			; CHECK NEXT DRIVE TYPE
  1677                              <1> 	;loop	TYPE_CHK
  1678                              <1> 	;dec	cl
  1679 000046D7 FECC                <1> 	dec	ah ; 11/07/2022
  1680 000046D9 75F5                <1> 	jnz	short TYPE_CHK
  1681                              <1> 	;
  1682 000046DB BB[57650000]        <1> 	mov	ebx, MD_TBL6		; 1.44MB fd parameter table
  1683                              <1> 					; Default for GET_PARM (11/12/2014)
  1684                              <1> 	;
  1685 000046E0 F9                  <1> 	stc				; DRIVE TYPE NOT FOUND IN TABLE
  1686                              <1> 	;jmp	short TYPE_RTN
  1687                              <1> 	; 12/07/2022
  1688 000046E1 C3                  <1> 	retn
  1689                              <1> DR_TYPE_VALID:
  1690                              <1> 	;mov	ebx, [DR_TYPE+ebx+1] 	; EBX = MEDIA TABLE
  1691 000046E2 43                  <1> 	inc	ebx
  1692 000046E3 8B1B                <1> 	mov	ebx, [ebx]
  1693                              <1> TYPE_RTN:
  1694                              <1> 	;pop	ecx ; 08/07/2022
  1695                              <1> 	; 24/12/2021
  1696                              <1> 	;pop	eax ; 11/07/2022
  1697 000046E5 C3                  <1> 	retn	
  1698                              <1> 		
  1699                              <1> ;----------------------------------------------------------------
  1700                              <1> ; SEND_SPEC							:
  1701                              <1> ;	SEND THE SPECIFY COMMAND TO CONTROLLER USING DATA FROM	:
  1702                              <1> ;	THE DRIVE PARAMETER TABLE POINTED BY @DISK_POINTER	:
  1703                              <1> ; ON ENTRY:	@DISK_POINTER = DRIVE PARAMETER TABLE		:
  1704                              <1> ; ON EXIT:	NONE						:	
  1705                              <1> ; REGISTERS ALTERED: CX, DX					:
  1706                              <1> ;----------------------------------------------------------------		
  1707                              <1> SEND_SPEC:
  1708                              <1> 	; 06/08/2022
  1709 000046E6 50                  <1> 	push	eax			; SAVE AX
  1710 000046E7 B8[0D470000]        <1> 	mov	eax, SPECBAC		; LOAD ERROR ADDRESS
  1711 000046EC 50                  <1> 	push	eax			; PUSH NEC_OUT ERROR RETURN
  1712 000046ED B403                <1> 	mov	ah, 03h			; SPECIFY COMMAND
  1713 000046EF E898050000          <1> 	call	NEC_OUTPUT		; OUTPUT THE COMMAND
  1714                              <1> 	;sub	dl, dl			; FIRST SPECIFY BYTE
  1715                              <1> 	; 06/08/2022
  1716 000046F4 28C0                <1> 	sub	al, al ; 0 
  1717 000046F6 E89B040000          <1> 	call	GET_PARM		; GET PARAMETER TO AH
  1718 000046FB E88C050000          <1> 	call	NEC_OUTPUT		; OUTPUT THE COMMAND
  1719                              <1> 	;mov	dl, 1			; SECOND SPECIFY BYTE
  1720                              <1> 	; 06/08/2022
  1721 00004700 B001                <1> 	mov	al, 1
  1722 00004702 E88F040000          <1> 	call	GET_PARM		; GET PARAMETER TO AH
  1723 00004707 E880050000          <1> 	call	NEC_OUTPUT		; OUTPUT THE COMMAND
  1724 0000470C 58                  <1> 	pop	eax			; POP ERROR RETURN
  1725                              <1> SPECBAC:
  1726 0000470D 58                  <1> 	pop	eax			; RESTORE ORIGINAL AX VALUE
  1727 0000470E C3                  <1> 	retn
  1728                              <1> 
  1729                              <1> ;----------------------------------------------------------------
  1730                              <1> ; SEND_SPEC_MD							:
  1731                              <1> ;	SEND THE SPECIFY COMMAND TO CONTROLLER USING DATA FROM	:
  1732                              <1> ;	THE MEDIA/DRIVE PARAMETER TABLE POINTED BY (CS:BX)	:
  1733                              <1> ; ON ENTRY:	CS:BX = MEDIA/DRIVE PARAMETER TABLE		:
  1734                              <1> ; ON EXIT:	NONE						:	
  1735                              <1> ; REGISTERS ALTERED: AX						:
  1736                              <1> ;----------------------------------------------------------------		
  1737                              <1> SEND_SPEC_MD:
  1738 0000470F 50                  <1> 	push	eax			; SAVE RATE DATA
  1739 00004710 B8[2D470000]        <1> 	mov	eax, SPEC_ESBAC		; LOAD ERROR ADDRESS
  1740 00004715 50                  <1> 	push	eax			; PUSH NEC_OUT ERROR RETURN
  1741 00004716 B403                <1> 	mov	ah, 03h			; SPECIFY COMMAND
  1742 00004718 E86F050000          <1> 	call	NEC_OUTPUT		; OUTPUT THE COMMAND
  1743 0000471D 8A23                <1>         mov     ah, [ebx+MD.SPEC1]      ; GET 1ST SPECIFY BYTE
  1744 0000471F E868050000          <1> 	call	NEC_OUTPUT		; OUTPUT THE COMMAND
  1745 00004724 8A6301              <1>         mov     ah, [ebx+MD.SPEC2]      ; GET SECOND SPECIFY BYTE
  1746 00004727 E860050000          <1> 	call	NEC_OUTPUT		; OUTPUT THE COMMAND
  1747 0000472C 58                  <1> 	pop	eax			; POP ERROR RETURN
  1748                              <1> SPEC_ESBAC:
  1749 0000472D 58                  <1> 	pop	eax			; RESTORE ORIGINAL AX VALUE
  1750 0000472E C3                  <1> 	retn
  1751                              <1> 
  1752                              <1> ;-------------------------------------------------------------------------------
  1753                              <1> ; XLAT_NEW  
  1754                              <1> ;	TRANSLATES DISKETTE STATE LOCATIONS FROM COMPATIBLE
  1755                              <1> ;	MODE TO NEW ARCHITECTURE.
  1756                              <1> ;
  1757                              <1> ; ON ENTRY:	DI = DRIVE #
  1758                              <1> ;-------------------------------------------------------------------------------
  1759                              <1> XLAT_NEW:
  1760                              <1> 	; 06/08/2022 - TRDOS 386 Kernel v2.0.5
  1761                              <1> 	; 11/07/2022 - Retro UNIX 386 v1.1 (Kernel v0.2.1.5)
  1762 0000472F 83FF01              <1> 	cmp	edi, 1			; VALID DRIVE
  1763 00004732 7709                <1> 	ja	short XN_OUT		; IF INVALID BACK
  1764 00004734 80BF[DB770100]00    <1> 	cmp	byte [DSK_STATE+edi], 0	; NO DRIVE ?
  1765 0000473B 7401                <1> 	jz	short DO_DET		; IF NO DRIVE ATTEMPT DETERMINE
  1766                              <1> 	
  1767                              <1> 	;;mov	cx, di			; CX = DRIVE NUMBER
  1768                              <1> 	;mov	ecx, edi
  1769                              <1> 	;or	cl, cl
  1770                              <1> 	;jz	short XN_0
  1771                              <1> 	;shl	cl, 2			; CL = SHIFT COUNT, A=0, B=4
  1772                              <1> 	;mov	al, [HF_CNTRL]		; DRIVE INFORMATION
  1773                              <1> 	;ror	al, cl			; TO LOW NIBBLE
  1774                              <1> ;XN_0:	
  1775                              <1> 	;and	al, DRV_DET+FMT_CAPA+TRK_CAPA ; KEEP DRIVE BITS
  1776                              <1>         ;and	byte [DSK_STATE+edi], ~(DRV_DET+FMT_CAPA+TRK_CAPA)
  1777                              <1> 	;or	[DSK_STATE+edi], al	; UPDATE DRIVE STATE
  1778                              <1> XN_OUT:
  1779 0000473D C3                  <1> 	retn
  1780                              <1> 
  1781                              <1> DO_DET:
  1782                              <1> 	;call	DRIVE_DET		; TRY TO DETERMINE
  1783                              <1> 	;retn
  1784                              <1> 	;jmp	DRIVE_DET
  1785                              <1> 
  1786                              <1> ;-------------------------------------------------------------------------------
  1787                              <1> ; DRIVE_DET
  1788                              <1> ;	DETERMINES WHETHER DRIVE IS 80 OR 40 TRACKS AND
  1789                              <1> ;	UPDATES STATE INFORMATION ACCORDINGLY.
  1790                              <1> ; ON ENTRY:	DI = DRIVE #
  1791                              <1> ;-------------------------------------------------------------------------------
  1792                              <1> DRIVE_DET:
  1793                              <1> 	; 06/08/2022 - TRDOS 386 Kernel v2.0.5
  1794                              <1> 	; 08/07/2022 - Retro UNIX 386 v1.1 (Kernel v0.2.1.5)
  1795 0000473E E88E040000          <1> 	call	MOTOR_ON		; TURN ON MOTOR IF NOT ALREADY ON
  1796 00004743 E8FA050000          <1> 	call	RECAL			; RECALIBRATE DRIVE
  1797 00004748 724E                <1> 	jc	short DD_BAC		; ASSUME NO DRIVE PRESENT
  1798 0000474A B530                <1> 	mov	ch, TRK_SLAP		; SEEK TO TRACK 48
  1799 0000474C E872050000          <1> 	call	SEEK
  1800 00004751 7245                <1> 	jc	short DD_BAC		; ERROR NO DRIVE
  1801 00004753 B50B                <1> 	mov	ch, QUIET_SEEK+1	; SEEK TO TRACK 10
  1802                              <1> SK_GIN:
  1803 00004755 FECD                <1> 	dec	ch			; DECREMENT TO NEXT TRACK
  1804                              <1> 	;push	cx			; SAVE TRACK
  1805                              <1> 	; 11/04/2021
  1806 00004757 51                  <1> 	push	ecx
  1807 00004758 E866050000          <1> 	call	SEEK
  1808 0000475D 723A                <1> 	jc	short POP_BAC		; POP AND RETURN
  1809 0000475F B8[99470000]        <1> 	mov	eax, POP_BAC		; LOAD NEC OUTPUT ERROR ADDRESS
  1810 00004764 50                  <1> 	push	eax
  1811 00004765 B404                <1> 	mov	ah, SENSE_DRV_ST	; SENSE DRIVE STATUS COMMAND BYTE
  1812 00004767 E820050000          <1> 	call	NEC_OUTPUT		; OUTPUT TO NEC
  1813                              <1> 	;mov	ax, di			; AL = DRIVE
  1814                              <1> 	; 06/08/2022
  1815 0000476C 89F8                <1> 	mov	eax, edi
  1816 0000476E 88C4                <1> 	mov	ah, al			; AH = DRIVE
  1817 00004770 E817050000          <1> 	call	NEC_OUTPUT		; OUTPUT TO NEC
  1818 00004775 E849060000          <1> 	call	RESULTS			; GO GET STATUS
  1819 0000477A 58                  <1> 	pop	eax			; THROW AWAY ERROR ADDRESS
  1820                              <1> 	;pop	cx			; RESTORE TRACK
  1821                              <1> 	; 11/04/2021
  1822 0000477B 59                  <1> 	pop	ecx
  1823 0000477C F605[D1770100]10    <1> 	test	byte [NEC_STATUS], HOME	; TRACK 0 ?
  1824 00004783 74D0                <1> 	jz	short SK_GIN		; GO TILL TRACK 0
  1825 00004785 08ED                <1> 	or	ch, ch			; IS HOME AT TRACK 0
  1826 00004787 7408                <1> 	jz	short IS_80		; MUST BE 80 TRACK DRIVE
  1827                              <1> 
  1828                              <1> ;	DRIVE IS A 360; SET DRIVE TO DETERMINED;
  1829                              <1> ;	SET MEDIA TO DETERMINED AT RATE 250.
  1830                              <1> 
  1831 00004789 808F[DB770100]94    <1> 	or	byte [DSK_STATE+edi], DRV_DET+MED_DET+RATE_250
  1832 00004790 C3                  <1> 	retn				; ALL INFORMATION SET
  1833                              <1> IS_80:
  1834 00004791 808F[DB770100]01    <1> 	or	byte [DSK_STATE+edi], TRK_CAPA ; SETUP 80 TRACK CAPABILITY
  1835                              <1> DD_BAC:
  1836 00004798 C3                  <1> 	retn
  1837                              <1> POP_BAC:
  1838                              <1> 	;pop	cx			; THROW AWAY
  1839                              <1> 	; 11/04/2021
  1840 00004799 59                  <1> 	pop	ecx
  1841 0000479A C3                  <1> 	retn
  1842                              <1> 
  1843                              <1> 
  1844                              <1> 	; 06/08/2022 - TRDOS 386 Kernel v2.0.5
  1845                              <1> 
  1846                              <1> %if 0
  1847                              <1> 
  1848                              <1> ;-------------------------------------------------------------------------------
  1849                              <1> ; XLAT_OLD 
  1850                              <1> ;	TRANSLATES DISKETTE STATE LOCATIONS FROM NEW
  1851                              <1> ;	ARCHITECTURE TO COMPATIBLE MODE.
  1852                              <1> ;
  1853                              <1> ; ON ENTRY:	DI = DRIVE
  1854                              <1> ;-------------------------------------------------------------------------------
  1855                              <1> XLAT_OLD:
  1856                              <1> 	cmp	edi, 1			; VALID DRIVE ?
  1857                              <1> 	ja	short XO_OUT            ; IF INVALID BACK
  1858                              <1>         cmp	byte [DSK_STATE+edi], 0	; NO DRIVE ?
  1859                              <1> 	jz	short XO_OUT		; IF NO DRIVE TRANSLATE DONE
  1860                              <1> 
  1861                              <1> ;-----	TEST FOR SAVED DRIVE INFORMATION ALREADY SET
  1862                              <1> 
  1863                              <1> 	;mov	cx, di			; CX = DRIVE NUMBER
  1864                              <1> 	; 06/08/2022
  1865                              <1> 	mov	ecx, edi
  1866                              <1> 	shl	cl, 2			; CL = SHIFT COUNT, A=0, B=4
  1867                              <1> 	mov	ah, FMT_CAPA		; LOAD MULTIPLE DATA RATE BIT MASK
  1868                              <1> 	ror	ah, cl			; ROTATE BY MASK
  1869                              <1> 	test	[HF_CNTRL], ah		; MULTIPLE-DATA RATE DETERMINED ?
  1870                              <1> 	jnz	short SAVE_SET		; IF SO, NO NEED TO RE-SAVE
  1871                              <1> 
  1872                              <1> ;-----	ERASE DRIVE BITS IN @HF_CNTRL FOR THIS DRIVE
  1873                              <1> 
  1874                              <1> 	mov	ah, DRV_DET+FMT_CAPA+TRK_CAPA ; MASK TO KEEP
  1875                              <1> 	ror	ah, cl			; FIX MASK TO KEEP
  1876                              <1> 	not	ah			; TRANSLATE MASK
  1877                              <1> 	and	[HF_CNTRL], ah		; KEEP BITS FROM OTHER DRIVE INTACT
  1878                              <1> 
  1879                              <1> ;-----	ACCESS CURRENT DRIVE BITS AND STORE IN @HF_CNTRL
  1880                              <1> 
  1881                              <1> 	mov	al, [DSK_STATE+edi]	; ACCESS STATE
  1882                              <1> 	and	al, DRV_DET+FMT_CAPA+TRK_CAPA ; KEEP DRIVE BITS
  1883                              <1> 	ror	al, cl			; FIX FOR THIS DRIVE
  1884                              <1> 	or	[HF_CNTRL], al		; UPDATE SAVED DRIVE STATE
  1885                              <1> 
  1886                              <1> ;-----	TRANSLATE TO COMPATIBILITY MODE
  1887                              <1> 
  1888                              <1> SAVE_SET:
  1889                              <1> 	mov	ah, [DSK_STATE+edi]	; ACCESS STATE
  1890                              <1> 	mov	bh, ah			; TO BH FOR LATER
  1891                              <1> 	and	ah, RATE_MSK		; KEEP ONLY RATE
  1892                              <1> 	cmp	ah, RATE_500		; RATE 500 ?
  1893                              <1> 	jz	short CHK_144		; YES 1.2/1.2 OR 1.44/1.44
  1894                              <1> 	mov	al, M3D1U		; AL = 360 IN 1.2 UNESTABLISHED
  1895                              <1> 	cmp	ah, RATE_300		; RATE 300 ?
  1896                              <1> 	jnz	short CHK_250		; NO, 360/360, 720/720 OR 720/1.44
  1897                              <1> 	test	bh, DBL_STEP		; CHECK FOR DOUBLE STEP
  1898                              <1> 	jnz	short TST_DET		; MUST BE 360 IN 1.2
  1899                              <1> UNKNO:
  1900                              <1> 	mov	al, MED_UNK		; NONE OF THE ABOVE
  1901                              <1> 	jmp	short AL_SET		; PROCESS COMPLETE
  1902                              <1> CHK_144:
  1903                              <1> 	call	CMOS_TYPE		; RETURN DRIVE TYPE IN (AL)
  1904                              <1> 	;;20/02/2015
  1905                              <1> 	;;jc	short UNKNO		; ERROR, SET 'NONE OF ABOVE'
  1906                              <1> 	jz	short UNKNO ;; 20/02/2015
  1907                              <1> 	cmp	al, 2			; 1.2MB DRIVE ?
  1908                              <1> 	jne	short UNKNO		; NO, GO SET 'NONE OF ABOVE'
  1909                              <1> 	mov	al, M1D1U		; AL = 1.2 IN 1.2 UNESTABLISHED
  1910                              <1> 	jmp	short TST_DET
  1911                              <1> CHK_250:
  1912                              <1> 	mov	al, M3D3U		; AL = 360 IN 360 UNESTABLISHED
  1913                              <1> 	cmp	ah, RATE_250		; RATE 250 ?
  1914                              <1> 	jnz	short UNKNO		; IF SO FALL IHRU
  1915                              <1> 	test	bh, TRK_CAPA		; 80 TRACK CAPABILITY ?
  1916                              <1> 	jnz	short UNKNO		; IF SO JUMP, FALL THRU TEST DET
  1917                              <1> TST_DET:
  1918                              <1> 	test	bh, MED_DET		; DETERMINED ?
  1919                              <1> 	jz	short AL_SET		; IF NOT THEN SET
  1920                              <1> 	add	al, 3			; MAKE DETERMINED/ESTABLISHED
  1921                              <1> AL_SET:
  1922                              <1> 	and	byte [DSK_STATE+edi], ~(DRV_DET+FMT_CAPA+TRK_CAPA) ; CLEAR DRIVE
  1923                              <1> 	or	[DSK_STATE+edi], al	; REPLACE WITH COMPATIBLE MODE
  1924                              <1> XO_OUT:
  1925                              <1> 	retn
  1926                              <1> 
  1927                              <1> %endif
  1928                              <1> 
  1929                              <1> ;-------------------------------------------------------------------------------
  1930                              <1> ; SETUP_STATE:	INITIALIZES START AND END RATES.
  1931                              <1> ;-------------------------------------------------------------------------------
  1932                              <1> SETUP_STATE:
  1933 0000479B F687[DB770100]10    <1> 	test	byte [DSK_STATE+edi], MED_DET ; MEDIA DETERMINED ?
  1934 000047A2 7537                <1> 	jnz	short J1C		; NO STATES IF DETERMINED
  1935 000047A4 66B84000            <1>         mov     ax, (RATE_500*256)+RATE_300 ; AH = START RATE, AL = END RATE
  1936 000047A8 F687[DB770100]04    <1> 	test	byte [DSK_STATE+edi], DRV_DET ; DRIVE ?
  1937 000047AF 740D                <1> 	jz	short AX_SET		; DO NOT KNOW DRIVE
  1938 000047B1 F687[DB770100]02    <1> 	test	byte [DSK_STATE+edi], FMT_CAPA ; MULTI-RATE?
  1939 000047B8 7504                <1> 	jnz	short AX_SET		; JUMP IF YES
  1940 000047BA 66B88080            <1>         mov     ax, RATE_250*257	; START A END RATE 250 FOR 360 DRIVE
  1941                              <1> AX_SET:	
  1942 000047BE 80A7[DB770100]1F    <1> 	and	byte [DSK_STATE+edi], ~(RATE_MSK+DBL_STEP) ; TURN OFF THE RATE
  1943 000047C5 08A7[DB770100]      <1> 	or	[DSK_STATE+edi], ah	; RATE FIRST TO TRY
  1944 000047CB 8025[D8770100]F3    <1> 	and	byte [LASTRATE], ~STRT_MSK ; ERASE LAST TO TRY RATE BITS
  1945 000047D2 C0C804              <1> 	ror	al, 4			; TO OPERATION LAST RATE LOCATION
  1946 000047D5 0805[D8770100]      <1> 	or	[LASTRATE], al		; LAST RATE
  1947                              <1> J1C:	
  1948 000047DB C3                  <1> 	retn
  1949                              <1> 
  1950                              <1> ;-------------------------------------------------------------------------------
  1951                              <1> ;  FMT_INIT: ESTABLISH STATE IF UNESTABLISHED AT FORMAT TIME.
  1952                              <1> ;-------------------------------------------------------------------------------
  1953                              <1> FMT_INIT:
  1954 000047DC F687[DB770100]10    <1> 	test	byte [DSK_STATE+edi], MED_DET ; IS MEDIA ESTABLISHED
  1955 000047E3 7546                <1> 	jnz	short F1_OUT		; IF SO RETURN
  1956 000047E5 E8A3030000          <1> 	call	CMOS_TYPE		; RETURN DRIVE TYPE IN AL
  1957                              <1> 	;; 20/02/2015
  1958                              <1> 	;;jc	short CL_DRV		; ERROR IN CMOS ASSUME NO DRIVE
  1959 000047EA 7440                <1> 	jz	short CL_DRV ;; 20/02/2015
  1960 000047EC FEC8                <1> 	dec	al			; MAKE ZERO ORIGIN
  1961                              <1> 	;;JS	short CL_DRV		; NO DRIVE IF AL 0
  1962 000047EE 8AA7[DB770100]      <1> 	mov	ah, [DSK_STATE+edi]	; AH = CURRENT STATE
  1963 000047F4 80E40F              <1> 	and	ah, ~(MED_DET+DBL_STEP+RATE_MSK) ; CLEAR
  1964 000047F7 08C0                <1> 	or	al, al			; CHECK FOR 360
  1965 000047F9 7505                <1> 	jnz	short N_360		; IF 360 WILL BE 0
  1966 000047FB 80CC90              <1> 	or	ah, MED_DET+RATE_250	; ESTABLISH MEDIA
  1967 000047FE EB25                <1> 	jmp	short SKP_STATE		; SKIP OTHER STATE PROCESSING
  1968                              <1> N_360:	
  1969 00004800 FEC8                <1> 	dec	al			; 1.2 M DRIVE
  1970 00004802 7505                <1> 	jnz	short N_12		; JUMP IF NOT
  1971                              <1> F1_RATE:
  1972 00004804 80CC10              <1> 	or	ah, MED_DET+RATE_500	; SET FORMAT RATE
  1973 00004807 EB1C                <1> 	jmp	short SKP_STATE		; SKIP OTHER STATE PROCESSING
  1974                              <1> N_12:	
  1975 00004809 FEC8                <1> 	dec	al			; CHECK FOR TYPE 3
  1976 0000480B 750F                <1> 	jnz	short N_720		; JUMP IF NOT
  1977 0000480D F6C404              <1> 	test	ah, DRV_DET		; IS DRIVE DETERMINED
  1978 00004810 7410                <1> 	jz	short ISNT_12		; TREAT AS NON 1.2 DRIVE
  1979 00004812 F6C402              <1> 	test	ah, FMT_CAPA		; IS 1.2M
  1980 00004815 740B                <1> 	jz	short ISNT_12		; JUMP IF NOT
  1981 00004817 80CC50              <1> 	or	ah, MED_DET+RATE_300	; RATE 300
  1982 0000481A EB09                <1> 	jmp	short SKP_STATE		; CONTINUE
  1983                              <1> N_720:
  1984 0000481C FEC8                <1> 	dec	al			; CHECK FOR TYPE 4
  1985 0000481E 750C                <1> 	jnz	short CL_DRV		; NO DRIVE, CMOS BAD
  1986 00004820 EBE2                <1> 	jmp	SHORT F1_RATE
  1987                              <1> ISNT_12: 
  1988 00004822 80CC90              <1> 	or	ah, MED_DET+RATE_250	; MUST BE RATE 250
  1989                              <1> SKP_STATE:
  1990 00004825 88A7[DB770100]      <1> 	mov	[DSK_STATE+edi], ah	; STORE AWAY
  1991                              <1> F1_OUT:
  1992 0000482B C3                  <1> 	retn
  1993                              <1> CL_DRV:	
  1994 0000482C 30E4                <1> 	xor	ah, ah			; CLEAR STATE
  1995 0000482E EBF5                <1> 	jmp	short SKP_STATE		; SAVE IT
  1996                              <1> 
  1997                              <1> ;-------------------------------------------------------------------------------
  1998                              <1> ; MED_CHANGE	
  1999                              <1> ;	CHECKS FOR MEDIA CHANGE, RESETS MEDIA CHANGE, 
  2000                              <1> ;	CHECKS MEDIA CHANGE AGAIN.
  2001                              <1> ;
  2002                              <1> ; ON EXIT:	CY = 1 MEANS MEDIA CHANGE OR TIMEOUT
  2003                              <1> ;		@DSKETTE_STATUS = ERROR CODE
  2004                              <1> ;-------------------------------------------------------------------------------
  2005                              <1> MED_CHANGE:
  2006                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  2007 00004830 E8E8050000          <1> 	call	READ_DSKCHNG		; READ DISK CHANCE LINE STATE
  2008 00004835 7445                <1> 	jz	short MC_OUT		; BYPASS HANDLING DISK CHANGE LINE
  2009 00004837 80A7[DB770100]EF    <1> 	and	byte [DSK_STATE+edi], ~MED_DET ; CLEAR STATE FOR THIS DRIVE
  2010                              <1> 
  2011                              <1> ;	THIS SEQUENCE ENSURES WHENEVER A DISKETTE IS CHANGED THAT
  2012                              <1> ;	ON THE NEXT OPERATION THE REQUIRED MOTOR START UP TIME WILL
  2013                              <1> ;	BE WAITED. (DRIVE MOTOR MAY GO OFF UPON DOOR OPENING).
  2014                              <1> 
  2015                              <1> 	;mov	cx, di			; CL = DRIVE 0
  2016                              <1> 	; 06/08/2022
  2017 0000483E 89F9                <1> 	mov	ecx, edi
  2018 00004840 B001                <1> 	mov	al, 1			; MOTOR ON BIT MASK
  2019 00004842 D2E0                <1> 	shl	al, cl			; TO APPROPRIATE POSITION
  2020 00004844 F6D0                <1> 	not	al			; KEEP ALL BUT MOTOR ON
  2021 00004846 FA                  <1> 	cli				; NO INTERRUPTS
  2022 00004847 2005[CE770100]      <1> 	and	[MOTOR_STATUS], al	; TURN MOTOR OFF INDICATOR
  2023 0000484D FB                  <1> 	sti				; INTERRUPTS ENABLED
  2024 0000484E E87E030000          <1> 	call	MOTOR_ON		; TURN MOTOR ON
  2025                              <1> 
  2026                              <1> ;-----	THIS SEQUENCE OF SEEKS IS USED TO RESET DISKETTE CHANGE SIGNAL
  2027                              <1> 
  2028 00004853 E83BFAFFFF          <1> 	call	DSK_RESET		; RESET NEC
  2029 00004858 B501                <1> 	mov	ch, 1			; MOVE TO CYLINDER 1
  2030 0000485A E864040000          <1> 	call	SEEK			; ISSUE SEEK
  2031 0000485F 30ED                <1> 	xor	ch, ch			; MOVE TO CYLINDER 0
  2032 00004861 E85D040000          <1> 	call	SEEK			; ISSUE SEEK
  2033 00004866 C605[D0770100]06    <1> 	mov	byte [DSKETTE_STATUS], MEDIA_CHANGE ; STORE IN STATUS
  2034                              <1> OK1:
  2035 0000486D E8AB050000          <1> 	call	READ_DSKCHNG		; CHECK MEDIA CHANGED AGAIN
  2036 00004872 7407                <1> 	jz	short OK2		; IF ACTIVE, NO DISKETTE, TIMEOUT
  2037                              <1> OK4:
  2038 00004874 C605[D0770100]80    <1> 	mov	byte [DSKETTE_STATUS], TIME_OUT ; TIMEOUT IF DRIVE EMPTY
  2039                              <1> OK2:		
  2040 0000487B F9                  <1> 	stc				; MEDIA CHANGED, SET CY
  2041                              <1> MC_OUT:	; 06/08/2022 (cf = 0)
  2042 0000487C C3                  <1> 	retn
  2043                              <1> ;MC_OUT:
  2044                              <1> 	;clc				; NO MEDIA CHANGED, CLEAR CY
  2045                              <1> 	;retn
  2046                              <1> 
  2047                              <1> ;-------------------------------------------------------------------------------
  2048                              <1> ; SEND_RATE
  2049                              <1> ;	SENDS DATA RATE COMMAND TO NEC
  2050                              <1> ; ON ENTRY:	DI = DRIVE #
  2051                              <1> ; ON EXIT:	NONE
  2052                              <1> ; REGISTERS ALTERED: DX
  2053                              <1> ;-------------------------------------------------------------------------------
  2054                              <1> SEND_RATE:
  2055                              <1> 	;push	ax			; SAVE REG.
  2056                              <1> 	; 11/04/2021
  2057 0000487D 50                  <1> 	push	eax
  2058 0000487E 8025[D8770100]3F    <1> 	and	byte [LASTRATE], ~SEND_MSK ; ELSE CLEAR LAST RATE ATTEMPTED
  2059 00004885 8A87[DB770100]      <1> 	mov	al, [DSK_STATE+edi]	; GET RATE STATE OF THIS DRIVE
  2060 0000488B 24C0                <1> 	and	al, SEND_MSK		; KEEP ONLY RATE BITS
  2061 0000488D 0805[D8770100]      <1> 	or	[LASTRATE], al		; SAVE NEW RATE FOR NEXT CHECK
  2062 00004893 C0C002              <1> 	rol	al, 2			; MOVE TO BIT OUTPUT POSITIONS
  2063 00004896 66BAF703            <1> 	mov	dx, 03F7h		; OUTPUT NEW DATA RATE
  2064 0000489A EE                  <1> 	out	dx, al
  2065                              <1> 	;pop	ax			; RESTORE REG.
  2066                              <1> 	; 11/04/2021
  2067 0000489B 58                  <1> 	pop	eax
  2068 0000489C C3                  <1> 	retn
  2069                              <1> 
  2070                              <1> ;-------------------------------------------------------------------------------
  2071                              <1> ; CHK_LASTRATE
  2072                              <1> ;	CHECK PREVIOUS DATE RATE SNT TO THE CONTROLLER.
  2073                              <1> ; ON ENTRY:
  2074                              <1> ;	DI = DRIVE #
  2075                              <1> ; ON EXIT:
  2076                              <1> ;	ZF =  1 DATA RATE IS THE SAME AS THE LAST RATE SENT TO NEC
  2077                              <1> ;	ZF =  0 DATA RATE IS DIFFERENT FROM LAST RATE
  2078                              <1> ; REGISTERS ALTERED: DX
  2079                              <1> ;-------------------------------------------------------------------------------
  2080                              <1> CHK_LASTRATE:
  2081                              <1> 	; 13/07/2022 - TRDOS 386 v2.0.5
  2082                              <1> 	;push	ax			; SAVE REG.
  2083                              <1> 	; 11/04/2021
  2084 0000489D 50                  <1> 	push	eax
  2085                              <1> 	; 13/07/2022 (BugFix)
  2086 0000489E 8A25[D8770100]      <1> 	mov	ah, [LASTRATE] 		; GET LAST DATA RATE SELECTED
  2087 000048A4 8A87[DB770100]      <1> 	mov	al, [DSK_STATE+edi]	; GET RATE STATE OF THIS DRIVE
  2088 000048AA 6625C0C0            <1>         and	ax, SEND_MSK*257        ; KEEP ONLY RATE BITS OF BOTH
  2089 000048AE 38E0                <1> 	cmp	al, ah			; COMPARE TO PREVIOUSLY TRIED
  2090                              <1> 					; ZF = 1 RATE IS THE SAME
  2091                              <1> 	;pop	ax			; RESTORE REG.
  2092                              <1> 	; 11/04/2021
  2093 000048B0 58                  <1> 	pop	eax
  2094 000048B1 C3                  <1> 	retn
  2095                              <1> 
  2096                              <1> ;-------------------------------------------------------------------------------
  2097                              <1> ; DMA_SETUP
  2098                              <1> ;	THIS ROUTINE SETS UP THE DMA FOR READ/WRITE/VERIFY OPERATIONS.
  2099                              <1> ;
  2100                              <1> ; ON ENTRY:	AL = DMA COMMAND
  2101                              <1> ;
  2102                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
  2103                              <1> ;-------------------------------------------------------------------------------
  2104                              <1> 
  2105                              <1> ; SI = Head #, # of Sectors or DASD Type
  2106                              <1> 
  2107                              <1> ; 22/08/2015
  2108                              <1> ; 08/02/2015 - Protected Mode Modification
  2109                              <1> ; 06/02/2015 - 07/02/2015
  2110                              <1> ; NOTE: Buffer address must be in 1st 16MB of Physical Memory (24 bit limit).
  2111                              <1> ; (DMA Addres = Physical Address)
  2112                              <1> ; (Retro UNIX 386 v1 Kernel/System Mode Virtual Address = Physical Address)
  2113                              <1> ;
  2114                              <1> ; 09/08/2022
  2115                              <1> ; 06/08/2022
  2116                              <1> ; 04/02/2016 (clc)
  2117                              <1> ; 20/02/2015 modification (source: AWARD BIOS 1999, DMA_SETUP)
  2118                              <1> ; 16/12/2014 (IODELAY)
  2119                              <1> 
  2120                              <1> DMA_SETUP:
  2121                              <1> 	; 09/08/2022
  2122                              <1> 	; 06/08/2022 - TRDOS 386 Kernel v2.0.5
  2123                              <1> 	;; 20/02/2015
  2124                              <1> 	;;mov	edx, [ebp+4] 		; Buffer address
  2125                              <1> 	; 06/08/2022
  2126                              <1> 	;mov	edx, ebp ; buffer address
  2127                              <1> 	;test	edx, 0FF000000h		; 16 MB limit (22/08/2015, bugfix)
  2128 000048B2 F7C5000000FF        <1> 	test	ebp, 0FF000000h
  2129 000048B8 7566                <1> 	jnz	short dma_bnd_err_stc
  2130                              <1> 	; 09/08/2022
  2131 000048BA 89EA                <1> 	mov	edx, ebp
  2132                              <1> 	;
  2133                              <1> 	;;push	ax			; DMA command
  2134                              <1> 	; 11/04/2021
  2135 000048BC 50                  <1> 	push	eax
  2136                              <1> 	; 06/08/2022
  2137                              <1> 	;push	edx			; *
  2138                              <1> 	;mov	dl, 3			; GET BYTES/SECTOR PARAMETER
  2139                              <1> 	; 06/08/2022
  2140 000048BD B003                <1> 	mov	al, 3			; GET BYTES/SECTOR PARAMETER
  2141 000048BF E8D2020000          <1> 	call	GET_PARM		; 
  2142 000048C4 88E1                <1> 	mov	cl, ah 			; SHIFT COUNT (0=128, 1=256, 2=512 ETC)
  2143                              <1> 	;mov	ax, si			; Sector count
  2144                              <1> 	; 06/08/2022
  2145 000048C6 89F0                <1> 	mov	eax, esi
  2146 000048C8 88C4                <1> 	mov	ah, al			; AH = # OF SECTORS
  2147 000048CA 28C0                <1> 	sub	al, al			; AL = 0, AX = # SECTORS * 256
  2148                              <1> 	;shr	ax, 1			; AX = # SECTORS * 128
  2149                              <1> 	; 06/08/2022
  2150 000048CC D1E8                <1> 	shr	eax, 1
  2151                              <1> 	;shl	ax, cl			; SHIFT BY PARAMETER VALUE
  2152                              <1> 	;dec	ax			; -1 FOR DMA VALUE
  2153                              <1> 	;mov	cx, ax
  2154 000048CE D3E0                <1> 	shl	eax, cl
  2155 000048D0 48                  <1> 	dec	eax
  2156 000048D1 89C1                <1> 	mov	ecx, eax
  2157                              <1> 	; 06/08/2022
  2158                              <1> 	;pop	edx			; *
  2159                              <1> 	;;pop	ax
  2160                              <1> 	; 11/04/2021
  2161 000048D3 58                  <1> 	pop	eax
  2162 000048D4 3C42                <1> 	cmp	al, 42h
  2163 000048D6 7507                <1>         jne     short NOT_VERF
  2164                              <1> 	; 09/08/2022
  2165 000048D8 BA0000FF00          <1> 	mov	edx, 0FF0000h
  2166                              <1> 	; 06/08/2022
  2167                              <1> 	;mov	ebp, 0FF0000h
  2168 000048DD EB08                <1> 	jmp	short J33
  2169                              <1> NOT_VERF:
  2170 000048DF 6601CA              <1> 	add	dx, cx			; check for overflow
  2171 000048E2 723D                <1> 	jc	short dma_bnd_err
  2172                              <1> 	;
  2173 000048E4 6629CA              <1> 	sub	dx, cx			; Restore start address
  2174                              <1> J33:
  2175 000048E7 FA                  <1> 	cli				; DISABLE INTERRUPTS DURING DMA SET-UP
  2176 000048E8 E60C                <1> 	out	DMA+12, al		; SET THE FIRST/LA5T F/F
  2177                              <1> 	IODELAY				; WAIT FOR I/O
    78 000048EA EB00                <2>  jmp short $+2
    79 000048EC EB00                <2>  jmp short $+2
  2178 000048EE E60B                <1> 	out	DMA+11, al		; OUTPUT THE MODE BYTE
  2179                              <1> 	;mov	eax, edx		; Buffer address
  2180                              <1> 	; 06/08/2022
  2181                              <1> 	;mov	eax, ebp
  2182                              <1> 	; 09/08/2022
  2183 000048F0 89D0                <1> 	mov	eax, edx
  2184 000048F2 E604                <1> 	out	DMA+4, al		; OUTPUT LOW ADDRESS
  2185                              <1> 	IODELAY				; WAIT FOR I/O
    78 000048F4 EB00                <2>  jmp short $+2
    79 000048F6 EB00                <2>  jmp short $+2
  2186 000048F8 88E0                <1> 	mov	al, ah
  2187 000048FA E604                <1> 	out	DMA+4, al		; OUTPUT HIGH ADDRESS
  2188 000048FC C1E810              <1> 	shr	eax, 16
  2189                              <1> 	IODELAY				; I/O WAIT STATE
    78 000048FF EB00                <2>  jmp short $+2
    79 00004901 EB00                <2>  jmp short $+2
  2190 00004903 E681                <1> 	out	081h, al		; OUTPUT HIGHEST BITS TO PAGE REGISTER
  2191                              <1> 	IODELAY
    78 00004905 EB00                <2>  jmp short $+2
    79 00004907 EB00                <2>  jmp short $+2
  2192                              <1> 	;mov	ax, cx			; Byte count - 1
  2193                              <1> 	; 06/08/2022
  2194 00004909 89C8                <1> 	mov	eax, ecx
  2195 0000490B E605                <1> 	out	DMA+5, al		; LOW BYTE OF COUNT
  2196                              <1> 	IODELAY				; WAIT FOR I/O
    78 0000490D EB00                <2>  jmp short $+2
    79 0000490F EB00                <2>  jmp short $+2
  2197 00004911 88E0                <1> 	mov	al, ah
  2198 00004913 E605                <1> 	out	DMA+5, al		; HIGH BYTE OF COUNT
  2199                              <1> 	IODELAY
    78 00004915 EB00                <2>  jmp short $+2
    79 00004917 EB00                <2>  jmp short $+2
  2200 00004919 FB                  <1> 	sti				; RE-ENABLE INTERRUPTS
  2201 0000491A B002                <1> 	mov	al, 2			; MODE FOR 8237
  2202 0000491C E60A                <1> 	out	DMA+10, al		; INITIALIZE THE DISKETTE CHANNEL
  2203                              <1> 
  2204 0000491E F8                  <1> 	clc	; 04/02/2016
  2205 0000491F C3                  <1> 	retn
  2206                              <1> 
  2207                              <1> dma_bnd_err_stc:
  2208 00004920 F9                  <1> 	stc
  2209                              <1> dma_bnd_err:
  2210 00004921 C605[D0770100]09    <1> 	mov	byte [DSKETTE_STATUS], DMA_BOUNDARY ; SET ERROR
  2211 00004928 C3                  <1> 	retn				; CY SET BY ABOVE IF ERROR
  2212                              <1> 
  2213                              <1> ;; 16/12/2014
  2214                              <1> ;;	CLI				; DISABLE INTERRUPTS DURING DMA SET-UP
  2215                              <1> ;;	OUT	DMA+12,AL		; SET THE FIRST/LA5T F/F
  2216                              <1> ;;	;jmp	$+2			; WAIT FOR I/O
  2217                              <1> ;;	IODELAY
  2218                              <1> ;; 	OUT	DMA+11,AL		; OUTPUT THE MODE BYTE
  2219                              <1> ;;	;SIODELAY
  2220                              <1> ;;      ;cmp	AL,42H			; DMA VERIFY COMMAND
  2221                              <1> ;;      ;JNE	short NOT_VERF		; NO
  2222                              <1> ;;      ;xor	AX,AX			; START ADDRESS
  2223                              <1> ;;      ;jmp	SHORT J33
  2224                              <1> ;;;NOT_VERF:	
  2225                              <1> ;;	;mov	AX,ES			; GET THE ES VALUE
  2226                              <1> ;;	;ROL	AX,4			; ROTATE LEFT
  2227                              <1> ;;	;mov	CH,AL			; GET HIGHEST NIBBLE OF ES TO CH
  2228                              <1> ;;	;and	AL,11110000B		; ZERO THE LOW NIBBLE FROM SEGMENT
  2229                              <1> ;;	;add	AX,[BP+2]		; TEST FOR CARRY FROM ADDITION
  2230                              <1> ;;	mov	eax,[ebp+4] ; 06/02/2015	
  2231                              <1> ;;	;jnc	short J33
  2232                              <1> ;;	;inc	CH			; CARRY MEANS HIGH 4 BITS MUST BE INC
  2233                              <1> ;;;J33:
  2234                              <1> ;;	push	eax			; SAVE START ADDRESS
  2235                              <1> ;;	OUT	DMA+4,AL		; OUTPUT LOW ADDRESS
  2236                              <1> ;;	;jmp	$+2			; WAIT FOR I/O
  2237                              <1> ;;	IODELAY
  2238                              <1> ;;	mov	AL,AH
  2239                              <1> ;;	OUT	DMA+4,AL		; OUTPUT HIGH ADDRESS
  2240                              <1> ;;	shr	eax, 16	     ; 07/02/2015
  2241                              <1> ;;	;mov	AL,CH			; GET HIGH 4 BITS
  2242                              <1> ;;	;jmp	$+2			; I/O WAIT STATE
  2243                              <1> ;;	IODELAY
  2244                              <1> ;;	;and	AL,00001111B
  2245                              <1> ;;	OUT	081H,AL			; OUTPUT HIGH 4 BITS TO PAGE REGISTER
  2246                              <1> ;;	;SIODELAY
  2247                              <1> ;;
  2248                              <1> ;;;----- DETERMINE COUNT
  2249                              <1> ;;	sub	eax, eax ; 08/02/2015
  2250                              <1> ;;	mov	AX,SI			; AL =  # OF SECTORS
  2251                              <1> ;;	xchg	AL,AH			; AH =  # OF SECTORS
  2252                              <1> ;;	sub	AL,AL			; AL = 0, AX = # SECTORS * 256
  2253                              <1> ;;	SHR	AX,1			; AX = # SECTORS * 128
  2254                              <1> ;;	push	AX			; SAVE # OF SECTORS * 128
  2255                              <1> ;;	mov	DL,3			; GET BYTES/SECTOR PARAMETER
  2256                              <1> ;;	call	GET_PARM		; "
  2257                              <1> ;;	mov	CL,AH			; SHIFT COUNT (0=128, 1=256, 2=512 ETC)
  2258                              <1> ;;	pop	AX			; AX = # SECTORS * 128
  2259                              <1> ;;	SHL	AX,CL			; SHIFT BY PARAMETER VALUE
  2260                              <1> ;;	dec	AX			; -1 FOR DMA VALUE
  2261                              <1> ;;	push	eax  ; 08/02/2015	; SAVE COUNT VALUE
  2262                              <1> ;;	OUT	DMA+5,AL		; LOW BYTE OF COUNT
  2263                              <1> ;;	;jmp	$+2			; WAIT FOR I/O
  2264                              <1> ;;	IODELAY
  2265                              <1> ;;	mov	AL,AH
  2266                              <1> ;;	OUT	DMA+5,AL		; HIGH BYTE OF COUNT
  2267                              <1> ;;	;IODELAY
  2268                              <1> ;;	STI				; RE-ENABLE INTERRUPTS
  2269                              <1> ;;	pop	ecx  ; 08/02/2015 	; RECOVER COUNT VALUE
  2270                              <1> ;;	pop	eax  ; 08/02/2015	; RECOVER ADDRESS VALUE
  2271                              <1> ;;	;add	AX, CX			; ADD, TEST FOR 64K OVERFLOW
  2272                              <1> ;;	add	ecx,eax ; 08/02/2015
  2273                              <1> ;;	mov	AL, 2			; MODE FOR 8237
  2274                              <1> ;;	;jmp	$+2			; WAIT FOR I/O
  2275                              <1> ;;	SIODELAY
  2276                              <1> ;;	OUT	DMA+10,AL		; INITIALIZE THE DISKETTE CHANNEL
  2277                              <1> ;;	;jnc	short NO_BAD		; CHECK FOR ERROR
  2278                              <1> ;;	jc	short dma_bnd_err ; 08/02/2015
  2279                              <1> ;;	and	ecx,0FFF00000h	; 16 MB limit
  2280                              <1> ;;	jz	short NO_BAD
  2281                              <1> ;;dma_bnd_err:
  2282                              <1> ;;	mov	byte [DSKETTE_STATUS],DMA_BOUNDARY ; SET ERROR
  2283                              <1> ;;NO_BAD:
  2284                              <1> ;;	retn				; CY SET BY ABOVE IF ERROR
  2285                              <1> 
  2286                              <1> ;-------------------------------------------------------------------------------
  2287                              <1> ; FMTDMA_SET
  2288                              <1> ;	THIS ROUTINE SETS UP THE DMA CONTROLLER FOR A FORMAT OPERATION.
  2289                              <1> ;
  2290                              <1> ; ON ENTRY:	NOTHING REQUIRED
  2291                              <1> ;
  2292                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
  2293                              <1> ;-------------------------------------------------------------------------------
  2294                              <1> 
  2295                              <1> FMTDMA_SET:
  2296                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  2297                              <1> 	;; 20/02/2015 modification	
  2298                              <1> 	;;mov	edx, [ebp+4] 		; Buffer address
  2299                              <1> 	; 06/08/2022
  2300                              <1> 	;mov	edx, ebp ; buffer address
  2301                              <1> 	; 06/08/2022
  2302                              <1> 	;test	edx, 0FF000000h		; 16 MB limit
  2303 00004929 F7C5000000FF        <1> 	test	ebp, 0FF000000h
  2304 0000492F 75EF                <1> 	jnz	short dma_bnd_err_stc
  2305                              <1> 	;
  2306                              <1> 	;;push	dx			; *
  2307                              <1> 	;; 11/04/2021
  2308                              <1> 	; 06/08/2022
  2309                              <1> 	;push	edx
  2310                              <1> 	;mov	dl, 4			; SECTORS/TRACK VALUE IN PARM TABLE
  2311                              <1> 	; 06/08/2022
  2312 00004931 B004                <1> 	mov	al, 4			; SECTORS/TRACK VALUE IN PARM TABLE				
  2313 00004933 E85E020000          <1> 	call	GET_PARM		; "
  2314 00004938 88E0                <1> 	mov	al, ah			; AL = SECTORS/TRACK VALUE
  2315 0000493A 28E4                <1> 	sub	ah, ah			; AX = SECTORS/TRACK VALUE
  2316                              <1> 	;shl	ax, 2			; AX = SEC/TRK * 4 (OFFSET C,H,R,N)
  2317                              <1> 	; 06/08/2022
  2318 0000493C C1E002              <1> 	shl	eax, 2
  2319                              <1> 	;dec	ax			; -1 FOR DMA VALUE
  2320 0000493F 48                  <1> 	dec	eax
  2321                              <1> 	;mov	cx, ax
  2322 00004940 89C1                <1> 	mov	ecx, eax
  2323                              <1> 	;;pop	dx			; *
  2324                              <1> 	;; 11/04/2021
  2325                              <1> 	; 06/08/2022
  2326                              <1> 	;pop	edx
  2327                              <1> 	; 06/08/2022
  2328 00004942 B04A                <1> 	mov	al, 04Ah
  2329                              <1> 	;
  2330 00004944 EB99                <1> 	jmp	short NOT_VERF ; 06/08/2022	
  2331                              <1> 
  2332                              <1> ;; 06/08/2022	
  2333                              <1> ;	add	dx, cx			; check for overflow
  2334                              <1> ;	jc	short dma_bnd_err
  2335                              <1> ;	;
  2336                              <1> ;	sub	dx, cx			; Restore start address
  2337                              <1> ;	;
  2338                              <1> ;	;mov	al, 04Ah		; WILL WRITE TO THE DISKETTE
  2339                              <1> ;	cli				; DISABLE INTERRUPTS DURING DMA SET-UP
  2340                              <1> ;	out	DMA+12, al		; SET THE FIRST/LA5T F/F
  2341                              <1> ;	IODELAY				; WAIT FOR I/O
  2342                              <1> ;	out	DMA+11, al		; OUTPUT THE MODE BYTE
  2343                              <1> ;	mov	eax, edx		; Buffer address
  2344                              <1> ;	out	DMA+4, al		; OUTPUT LOW ADDRESS
  2345                              <1> ;	IODELAY				; WAIT FOR I/O
  2346                              <1> ;	mov	al, ah
  2347                              <1> ;	out	DMA+4, al		; OUTPUT HIGH ADDRESS
  2348                              <1> ;	shr	eax, 16
  2349                              <1> ;	IODELAY				; I/O WAIT STATE
  2350                              <1> ;	out	081h, al		; OUTPUT HIGHEST BITS TO PAGE REGISTER
  2351                              <1> ;	IODELAY
  2352                              <1> ;	;mov	ax, cx			; Byte count - 1
  2353                              <1> ;	; 06/08/2022
  2354                              <1> ;	mov	eax, ecx
  2355                              <1> ;	out	DMA+5, al		; LOW BYTE OF COUNT
  2356                              <1> ;	IODELAY				; WAIT FOR I/O
  2357                              <1> ;	mov	al, ah
  2358                              <1> ;	out	DMA+5, al		; HIGH BYTE OF COUNT
  2359                              <1> ;	IODELAY
  2360                              <1> ;	sti				; RE-ENABLE INTERRUPTS
  2361                              <1> ;	mov	al, 2			; MODE FOR 8237
  2362                              <1> ;	out	DMA+10, al		; INITIALIZE THE DISKETTE CHANNEL
  2363                              <1> ;
  2364                              <1> ;	; 06/08/2022
  2365                              <1> ;	clc
  2366                              <1> ;	retn
  2367                              <1> 
  2368                              <1> ;; 08/02/2015 - Protected Mode Modification
  2369                              <1> ;;	mov	AL,04AH			; WILL WRITE TO THE DISKETTE
  2370                              <1> ;;	CLI				; DISABLE INTERRUPTS DURING DMA SET-UP
  2371                              <1> ;;	OUT	DMA+12,AL		; SET THE FIRST/LA5T F/F
  2372                              <1> ;;	;jmp	$+2			; WAIT FOR I/O
  2373                              <1> ;;	IODELAY
  2374                              <1> ;;	OUT	DMA+11,AL		; OUTPUT THE MODE BYTE
  2375                              <1> ;;	;mov	AX,ES			; GET THE ES VALUE
  2376                              <1> ;;	;ROL	AX,4			; ROTATE LEFT
  2377                              <1> ;;	;mov	CH,AL			; GET HIGHEST NIBBLE OF ES TO CH
  2378                              <1> ;;	;and	AL,11110000B		; ZERO THE LOW NIBBLE FROM SEGMENT
  2379                              <1> ;;	;add	AX,[BP+2]		; TEST FOR CARRY FROM ADDITION
  2380                              <1> ;;	;jnc	short J33A
  2381                              <1> ;;	;inc	CH			; CARRY MEANS HIGH 4 BITS MUST BE INC
  2382                              <1> ;;	mov	eax,[ebp+4] ; 08/02/2015
  2383                              <1> ;;;J33A:
  2384                              <1> ;;	push	eax ; 08/02/2015	; SAVE START ADDRESS
  2385                              <1> ;;	OUT	DMA+4,AL		; OUTPUT LOW ADDRESS
  2386                              <1> ;;	;jmp	$+2			; WAIT FOR I/O
  2387                              <1> ;;	IODELAY
  2388                              <1> ;;	mov	AL,AH
  2389                              <1> ;;	OUT	DMA+4,AL		; OUTPUT HIGH ADDRESS
  2390                              <1> ;;	shr 	eax,16 ; 08/02/2015
  2391                              <1> ;;	;mov	AL,CH			; GET HIGH 4 BITS
  2392                              <1> ;;	;jmp	$+2			; I/O WAIT STATE
  2393                              <1> ;;	IODELAY
  2394                              <1> ;;	;and	AL,00001111B
  2395                              <1> ;;	OUT	081H,AL			; OUTPUT HIGH 4 BITS TO PAGE REGISTER
  2396                              <1> ;;
  2397                              <1> ;;;----- DETERMINE COUNT
  2398                              <1> ;;	sub	eax,eax ; 08/02/2015
  2399                              <1> ;;	mov	DL,4			; SECTORS/TRACK VALUE IN PARM TABLE
  2400                              <1> ;;	call	GET_PARM		; "
  2401                              <1> ;;	xchg	AL,AH			; AL = SECTORS/TRACK VALUE
  2402                              <1> ;;	sub	AH,AH			; AX = SECTORS/TRACK VALUE
  2403                              <1> ;;	SHL	AX,2			; AX = SEC/TRK * 4 (OFFSET C,H,R,N)
  2404                              <1> ;;	dec	AX			; -1 FOR DMA VALUE
  2405                              <1> ;;	push	eax 	; 08/02/2015	; SAVE # OF BYTES TO BE TRANSFERED
  2406                              <1> ;;	OUT	DMA+5,AL		; LOW BYTE OF COUNT
  2407                              <1> ;;	;jmp	$+2			; WAIT FOR I/O
  2408                              <1> ;;	IODELAY
  2409                              <1> ;;	mov	AL,AH
  2410                              <1> ;;	OUT	DMA+5,AL		; HIGH BYTE OF COUNT
  2411                              <1> ;;	STI				; RE-ENABLE INTERRUPTS
  2412                              <1> ;;	pop	ecx	; 08/02/2015	; RECOVER COUNT VALUE
  2413                              <1> ;;	pop	eax	; 08/02/2015	; RECOVER ADDRESS VALUE
  2414                              <1> ;;	;add	AX,CX			; ADD, TEST FOR 64K OVERFLOW
  2415                              <1> ;;	add	ecx,eax ; 08/02/2015
  2416                              <1> ;;	mov	AL,2			; MODE FOR 8237
  2417                              <1> ;;	;jmp	$+2			; WAIT FOR I/O
  2418                              <1> ;;	SIODELAY
  2419                              <1> ;;	OUT	DMA+10,AL		; INITIALIZE THE DISKETTE CHANNEL
  2420                              <1> ;;	;jnc	short FMTDMA_OK		; CHECK FOR ERROR
  2421                              <1> ;;	jc	short fmtdma_bnd_err ; 08/02/2015
  2422                              <1> ;;	and	ecx,0FFF00000h	; 16 MB limit
  2423                              <1> ;;	jz	short FMTDMA_OK
  2424                              <1> ;;	stc	; 20/02/2015
  2425                              <1> ;;fmtdma_bnd_err:
  2426                              <1> ;;	mov	byte [DSKETTE_STATUS],DMA_BOUNDARY ; SET ERROR
  2427                              <1> ;;FMTDMA_OK:
  2428                              <1> ;;	retn				; CY SET BY ABOVE IF ERROR
  2429                              <1> 
  2430                              <1> ;-------------------------------------------------------------------------------
  2431                              <1> ; NEC_INIT	
  2432                              <1> ;	THIS ROUTINE SEEKS TO THE REQUESTED TRACK AND INITIALIZES
  2433                              <1> ;	THE NEC FOR THE READ/WRITE/VERIFY/FORMAT OPERATION.
  2434                              <1> ;
  2435                              <1> ; ON ENTRY:	AH = NEC COMMAND TO BE PERFORMED
  2436                              <1> ;
  2437                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
  2438                              <1> ;-------------------------------------------------------------------------------
  2439                              <1> NEC_INIT:
  2440                              <1> 	; 11/08/2022
  2441                              <1> 	; EBX = user's ECX register content (on stack)
  2442                              <1> 	; 10/08/2022
  2443                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  2444                              <1> 	;push	ax			; SAVE NEC COMMAND
  2445                              <1> 	; 11/04/2021
  2446 00004946 50                  <1> 	push	eax
  2447 00004947 E885020000          <1> 	call	MOTOR_ON		; TURN MOTOR ON FOR SPECIFIC DRIVE
  2448                              <1> 
  2449                              <1> ;-----	DO THE SEEK OPERATION
  2450                              <1> 
  2451                              <1> 	;mov	ch, [ebp+1]		; CH = TRACK #
  2452                              <1> 	; 10/08/2022
  2453 0000494C 88FD                <1> 	mov	ch, bh ; CH = TRACK #
  2454 0000494E E870030000          <1> 	call	SEEK			; MOVE TO CORRECT TRACK
  2455                              <1> 	;pop	ax			; RECOVER COMMAND
  2456                              <1> 	; 11/04/2021
  2457 00004953 58                  <1> 	pop	eax
  2458 00004954 721D                <1> 	jc	short ER_1		; ERROR ON SEEK
  2459 00004956 BB[73490000]        <1> 	mov	ebx, ER_1		; LOAD ERROR ADDRESS
  2460 0000495B 53                  <1> 	push	ebx			; PUSH NEC_OUT ERROR RETURN
  2461                              <1> 
  2462                              <1> ;-----	SEND OUT THE PARAMETERS TO THE CONTROLLER
  2463                              <1> 
  2464 0000495C E82B030000          <1> 	call	NEC_OUTPUT		; OUTPUT THE OPERATION COMMAND
  2465                              <1> 	;mov	ax, si			; AH = HEAD #
  2466                              <1> 	; 06/08/2022
  2467 00004961 89F0                <1> 	mov	eax, esi
  2468 00004963 89FB                <1> 	mov	ebx, edi		; BL = DRIVE #
  2469 00004965 C0E402              <1> 	sal	ah, 2			; MOVE IT TO BIT 2
  2470 00004968 80E404              <1> 	and	ah, 00000100b		; ISOLATE THAT BIT
  2471 0000496B 08DC                <1> 	or	ah, bl			; OR IN THE DRIVE NUMBER
  2472 0000496D E81A030000          <1> 	call	NEC_OUTPUT		; FALL THRU CY SET IF ERROR
  2473 00004972 5B                  <1> 	pop	ebx			; THROW AWAY ERROR RETURN
  2474                              <1> ER_1:
  2475 00004973 C3                  <1> 	retn
  2476                              <1> 
  2477                              <1> ;-------------------------------------------------------------------------------
  2478                              <1> ; RWV_COM
  2479                              <1> ;	THIS ROUTINE SENDS PARAMETERS TO THE NEC SPECIFIC TO THE 
  2480                              <1> ;	READ/WRITE/VERIFY OPERATIONS.
  2481                              <1> ;
  2482                              <1> ; ON ENTRY:	CS:BX = ADDRESS OF MEDIA/DRIVE PARAMETER TABLE
  2483                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
  2484                              <1> ;-------------------------------------------------------------------------------
  2485                              <1> RWV_COM:
  2486                              <1> 	; 11/08/2022
  2487                              <1> 	; 10/08/2022
  2488                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  2489 00004974 B8[C0490000]        <1> 	mov	eax, ER_2		; LOAD ERROR ADDRESS
  2490 00004979 50                  <1> 	push	eax			; PUSH NEC_OUT ERROR RETURN
  2491                              <1> 	;mov	ah, [ebp+1]		; OUTPUT TRACK #
  2492                              <1> 	; 11/08/2022
  2493 0000497A 8A642425            <1> 	mov	ah, [esp+37] ; CH = OUTPUT TRACK #
  2494 0000497E E809030000          <1> 	call	NEC_OUTPUT
  2495                              <1> 	;mov	ax, si			; OUTPUT HEAD #
  2496                              <1> 	; 06/08/2022
  2497 00004983 89F0                <1> 	mov	eax, esi
  2498 00004985 E802030000          <1> 	call	NEC_OUTPUT
  2499                              <1> 	;mov	ah, [ebp]		; OUTPUT SECTOR #
  2500                              <1> 	; 11/08/2022
  2501 0000498A 8A642424            <1> 	mov	ah, [esp+36] ; CL = OUTPUT SECTOR #
  2502 0000498E E8F9020000          <1> 	call	NEC_OUTPUT
  2503                              <1> 	;mov	dl, 3			; BYTES/SECTOR PARAMETER FROM BLOCK
  2504                              <1> 	; 06/08/2022
  2505 00004993 B003                <1> 	mov	al, 3
  2506 00004995 E8FC010000          <1> 	call	GET_PARM 		; ... TO THE NEC
  2507 0000499A E8ED020000          <1> 	call	NEC_OUTPUT		; OUTPUT TO CONTROLLER
  2508                              <1> 	;mov	dl, 4			; EOT PARAMETER FROM BLOCK
  2509                              <1> 	; 06/08/2022
  2510 0000499F B004                <1> 	mov	al, 4
  2511 000049A1 E8F0010000          <1> 	call	GET_PARM 		; ... TO THE NEC
  2512 000049A6 E8E1020000          <1> 	call	NEC_OUTPUT		; OUTPUT TO CONTROLLER
  2513 000049AB 8A6305              <1> 	mov	ah, [ebx+MD.GAP]        ; GET GAP LENGTH
  2514                              <1> _R15:
  2515 000049AE E8D9020000          <1> 	call	NEC_OUTPUT
  2516                              <1> 	;mov	dl, 6			; DTL PARAMETER PROM BLOCK
  2517                              <1> 	; 06/08/2022
  2518 000049B3 B006                <1> 	mov	al, 6
  2519 000049B5 E8DC010000          <1> 	call	GET_PARM		; ... TO THE NEC
  2520 000049BA E8CD020000          <1> 	call	NEC_OUTPUT		; OUTPUT TO CONTROLLER
  2521 000049BF 58                  <1> 	pop	eax			; THROW AWAY ERROR EXIT
  2522                              <1> ER_2:
  2523 000049C0 C3                  <1> 	retn
  2524                              <1> 
  2525                              <1> ;-------------------------------------------------------------------------------
  2526                              <1> ; NEC_TERM
  2527                              <1> ;	THIS ROUTINE WAITS FOR THE OPERATION THEN ACCEPTS THE STATUS 
  2528                              <1> ;	FROM THE NEC FOR THE READ/WRITE/VERIFY/FORWAT OPERATION.
  2529                              <1> ;
  2530                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
  2531                              <1> ;-------------------------------------------------------------------------------
  2532                              <1> NEC_TERM:
  2533                              <1> 
  2534                              <1> ;-----	LET THE OPERATION HAPPEN
  2535                              <1> 
  2536 000049C1 56                  <1> 	push	esi			; SAVE HEAD #, # OF SECTORS
  2537 000049C2 E8CD030000          <1> 	call	WAIT_INT		; WAIT FOR THE INTERRUPT
  2538 000049C7 9C                  <1> 	pushf
  2539 000049C8 E8F6030000          <1> 	call	RESULTS			; GET THE NEC STATUS
  2540 000049CD 724B                <1> 	jc	short SET_END_POP
  2541 000049CF 9D                  <1> 	popf
  2542 000049D0 723E                <1> 	jc	short SET_END		; LOOK FOR ERROR
  2543                              <1> 
  2544                              <1> ;-----	CHECK THE RESULTS RETURNED BY THE CONTROLLER
  2545                              <1> 
  2546 000049D2 FC                  <1> 	cld				; SET THE CORRECT DIRECTION
  2547 000049D3 BE[D1770100]        <1> 	mov	esi, NEC_STATUS		; POINT TO STATUS FIELD
  2548 000049D8 AC                  <1> 	lodsb				; GET ST0
  2549 000049D9 24C0                <1> 	and	AL, 11000000B		; TEST FOR NORMAL TERMINATION
  2550 000049DB 7433                <1> 	jz	short SET_END
  2551 000049DD 3C40                <1> 	cmp	AL,01000000B		; TEST FOR ABNORMAL TERMINATION
  2552 000049DF 7527                <1> 	jnz	short J18		; NOT ABNORMAL, BAD NEC
  2553                              <1> 
  2554                              <1> ;-----	ABNORMAL TERMINATION, FIND OUT WHY
  2555                              <1> 
  2556 000049E1 AC                  <1> 	lodsb				; GET ST1
  2557 000049E2 D0E0                <1> 	sal	al, 1			; TEST FOR EDT FOUND
  2558 000049E4 B404                <1> 	mov	ah, RECORD_NOT_FND
  2559 000049E6 7222                <1> 	jc	short J19
  2560 000049E8 C0E002              <1> 	sal	al, 2
  2561 000049EB B410                <1> 	mov	ah, BAD_CRC
  2562 000049ED 721B                <1> 	jc	short J19
  2563 000049EF D0E0                <1> 	sal	al, 1			; TEST FOR DMA OVERRUN
  2564 000049F1 B408                <1> 	mov	ah, BAD_DMA
  2565 000049F3 7215                <1> 	jc	short J19
  2566 000049F5 C0E002              <1> 	sal	al, 2			; TEST FOR RECORD NOT FOUND
  2567 000049F8 B404                <1> 	mov	ah, RECORD_NOT_FND
  2568 000049FA 720E                <1> 	jc	short J19
  2569 000049FC D0E0                <1> 	sal	al, 1
  2570 000049FE B403                <1> 	mov	ah, WRITE_PROTECT	; TEST FOR WRITE_PROTECT
  2571 00004A00 7208                <1> 	jc	short J19
  2572 00004A02 D0E0                <1> 	sal	al, 1			; TEST MISSING ADDRESS MARK
  2573 00004A04 B402                <1> 	mov	ah, BAD_ADDR_MARK
  2574 00004A06 7202                <1> 	jc	short J19
  2575                              <1> 
  2576                              <1> ;----- 	NEC MUST HAVE FAILED
  2577                              <1> J18:
  2578 00004A08 B420                <1> 	mov	ah, BAD_NEC
  2579                              <1> J19:
  2580 00004A0A 0825[D0770100]      <1> 	or	[DSKETTE_STATUS], ah
  2581                              <1> SET_END:
  2582 00004A10 803D[D0770100]01    <1> 	cmp	byte [DSKETTE_STATUS], 1 ; SET ERROR CONDITION
  2583 00004A17 F5                  <1> 	cmc
  2584 00004A18 5E                  <1> 	pop	esi
  2585 00004A19 C3                  <1> 	retn				; RESTORE HEAD #, # OF SECTORS
  2586                              <1> 
  2587                              <1> SET_END_POP:
  2588 00004A1A 9D                  <1> 	popf
  2589 00004A1B EBF3                <1> 	jmp	short SET_END
  2590                              <1> 
  2591                              <1> ;-------------------------------------------------------------------------------
  2592                              <1> ; DSTATE:	ESTABLISH STATE UPON SUCCESSFUL OPERATION.
  2593                              <1> ;-------------------------------------------------------------------------------
  2594                              <1> DSTATE:
  2595 00004A1D 803D[D0770100]00    <1> 	cmp	byte [DSKETTE_STATUS], 0 ; CHECK FOR ERROR
  2596 00004A24 753E                <1> 	jnz	short SETBAC		; IF ERROR JUMP
  2597 00004A26 808F[DB770100]10    <1> 	or	byte [DSK_STATE+edi], MED_DET
  2598                              <1> 					; NO ERROR, MARK MEDIA AS DETERMINED
  2599 00004A2D F687[DB770100]04    <1> 	test	byte [DSK_STATE+edi], DRV_DET ; DRIVE DETERMINED ?
  2600 00004A34 752E                <1> 	jnz	short SETBAC		; IF DETERMINED NO TRY TO DETERMINE
  2601 00004A36 8A87[DB770100]      <1> 	mov	al, [DSK_STATE+edi]	; LOAD STATE
  2602 00004A3C 24C0                <1> 	and	al, RATE_MSK		; KEEP ONLY RATE
  2603 00004A3E 3C80                <1> 	cmp	al, RATE_250		; RATE 250 ?
  2604 00004A40 751B                <1> 	jne	short M_12		; NO, MUST BE 1.2M OR 1.44M DRIVE
  2605                              <1> 
  2606                              <1> ;----- 	CHECK IF IT IS 1.44M
  2607                              <1> 
  2608 00004A42 E846010000          <1> 	call	CMOS_TYPE		; RETURN DRIVE TYPE IN (AL)
  2609                              <1> 	;;20/02/2015
  2610                              <1> 	;;jc	short M_12		; CMOS BAD
  2611 00004A47 7414                <1> 	jz	short M_12 ;; 20/02/2015
  2612 00004A49 3C04                <1> 	cmp	al, 4			; 1.44MB DRIVE ?
  2613 00004A4B 7410                <1> 	je	short M_12		; YES
  2614                              <1> M_720:
  2615 00004A4D 80A7[DB770100]FD    <1> 	and	byte [DSK_STATE+edi], ~FMT_CAPA ; TURN OFF FORMAT CAPABILITY
  2616 00004A54 808F[DB770100]04    <1> 	or	byte [DSK_STATE+edi], DRV_DET ; MARK DRIVE DETERMINED
  2617 00004A5B EB07                <1> 	jmp	short SETBAC		; BACK
  2618                              <1> M_12:	
  2619 00004A5D 808F[DB770100]06    <1> 	or	byte [DSK_STATE+edi], DRV_DET+FMT_CAPA 
  2620                              <1> 					; TURN ON DETERMINED & FMT CAPA
  2621                              <1> SETBAC:
  2622 00004A64 C3                  <1> 	retn
  2623                              <1> 
  2624                              <1> ;-------------------------------------------------------------------------------
  2625                              <1> ; RETRY	
  2626                              <1> ;	DETERMINES WHETHER A RETRY IS NECESSARY. 
  2627                              <1> ;	IF RETRY IS REQUIRED THEN STATE INFORMATION IS UPDATED FOR RETRY.
  2628                              <1> ;
  2629                              <1> ; ON EXIT:	CY = 1 FOR RETRY, CY = 0 FOR NO RETRY
  2630                              <1> ;-------------------------------------------------------------------------------
  2631                              <1> RETRY:
  2632                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  2633 00004A65 803D[D0770100]00    <1> 	cmp	byte [DSKETTE_STATUS], 0 ; GET STATUS OF OPERATION
  2634 00004A6C 7445                <1> 	jz	short NO_RETRY		; SUCCESSFUL OPERATION
  2635 00004A6E 803D[D0770100]80    <1> 	cmp	byte [DSKETTE_STATUS], TIME_OUT ; IF TIME OUT NO RETRY
  2636 00004A75 743C                <1> 	jz	short NO_RETRY
  2637 00004A77 8AA7[DB770100]      <1> 	mov	ah, [DSK_STATE+edi]	; GET MEDIA STATE OF DRIVE
  2638 00004A7D F6C410              <1> 	test	ah, MED_DET		; ESTABLISHED/DETERMINED ?
  2639 00004A80 7531                <1> 	jnz	short NO_RETRY		; IF ESTABLISHED STATE THEN TRUE ERROR
  2640 00004A82 80E4C0              <1> 	and	ah, RATE_MSK		; ISOLATE RATE
  2641 00004A85 8A2D[D8770100]      <1> 	mov	ch, [LASTRATE]		; GET START OPERATION STATE
  2642 00004A8B C0C504              <1> 	rol	ch, 4			; TO CORRESPONDING BITS
  2643 00004A8E 80E5C0              <1> 	and	ch, RATE_MSK		; ISOLATE RATE BITS
  2644 00004A91 38E5                <1> 	cmp	ch, ah			; ALL RATES TRIED
  2645 00004A93 741E                <1> 	je	short NO_RETRY		; IF YES, THEN TRUE ERROR
  2646                              <1> 
  2647                              <1> ;	SETUP STATE INDICATOR FOR RETRY ATTEMPT TO NEXT RATE
  2648                              <1> ;	 00000000B (500) -> 10000000B	(250)
  2649                              <1> ;	 10000000B (250) -> 01000000B	(300)
  2650                              <1> ;	 01000000B (300) -> 00000000B	(500)
  2651                              <1> 
  2652 00004A95 80FC01              <1> 	cmp	ah, RATE_500+1		; SET CY FOR RATE 500
  2653 00004A98 D0DC                <1> 	rcr	ah, 1			; TO NEXT STATE
  2654 00004A9A 80E4C0              <1> 	and	ah, RATE_MSK		; KEEP ONLY RATE BITS
  2655 00004A9D 80A7[DB770100]1F    <1> 	and	byte [DSK_STATE+edi], ~(RATE_MSK+DBL_STEP)
  2656                              <1> 					; RATE, DBL STEP OFF
  2657 00004AA4 08A7[DB770100]      <1> 	or	[DSK_STATE+edi], ah	; TURN ON NEW RATE
  2658 00004AAA C605[D0770100]00    <1> 	mov	byte [DSKETTE_STATUS], 0  ; RESET STATUS FOR RETRY
  2659 00004AB1 F9                  <1> 	stc				; SET CARRY FOR RETRY
  2660 00004AB2 C3                  <1> 	retn				; RETRY RETURN
  2661                              <1> 
  2662                              <1> NO_RETRY:
  2663                              <1> 	; 06/08/2022
  2664                              <1> 	;clc				; CLEAR CARRY NO RETRY
  2665 00004AB3 C3                  <1> 	retn				; NO RETRY RETURN
  2666                              <1> 
  2667                              <1> ;-------------------------------------------------------------------------------
  2668                              <1> ; NUM_TRANS
  2669                              <1> ;	THIS ROUTINE CALCULATES THE NUMBER OF SECTORS THAT WERE
  2670                              <1> ;	ACTUALLY TRANSFERRED TO/FROM THE DISKETTE.
  2671                              <1> ;
  2672                              <1> ; ON ENTRY:	[BP+1] = TRACK
  2673                              <1> ;		SI-HI  = HEAD
  2674                              <1> ;		[BP]   = START SECTOR
  2675                              <1> ;
  2676                              <1> ; ON EXIT:	AL = NUMBER ACTUALLY TRANSFERRED
  2677                              <1> ;-------------------------------------------------------------------------------
  2678                              <1> NUM_TRANS:
  2679                              <1> 	; 10/08/2022
  2680                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  2681 00004AB4 30C0                <1> 	xor	al, al			; CLEAR FOR ERROR
  2682                              <1> 	;cmp	byte [DSKETTE_STATUS], 0
  2683 00004AB6 3805[D0770100]      <1> 	cmp	[DSKETTE_STATUS], al ; 0 ; CHECK FOR ERROR
  2684 00004ABC 752D                <1> 	jnz	short NT_OUT		; IF ERROR 0 TRANSFERRED
  2685                              <1> 	;mov	dl, 4			; SECTORS/TRACK OFFSET TO DL
  2686                              <1> 	; 06/08/2022
  2687 00004ABE B004                <1> 	mov	al, 4
  2688 00004AC0 E8D1000000          <1> 	call	GET_PARM		; AH = SECTORS/TRACK
  2689 00004AC5 8A1D[D6770100]      <1> 	mov	bl, [NEC_STATUS+5]	; GET ENDING SECTOR
  2690                              <1> 	;mov	cx, si			; CH = HEAD # STARTED
  2691                              <1> 	; 06/08/2022
  2692 00004ACB 89F1                <1> 	mov	ecx, esi
  2693 00004ACD 3A2D[D5770100]      <1> 	cmp	ch, [NEC_STATUS+4]	; GET HEAD ENDED UP ON
  2694 00004AD3 750E                <1> 	jnz	short DIF_HD		; IF ON SAME HEAD, THEN NO ADJUST
  2695 00004AD5 8A2D[D4770100]      <1> 	mov	ch, [NEC_STATUS+3]	; GET TRACK ENDED UP ON
  2696                              <1> 	;cmp	ch, [ebp+1]		; IS IT ASKED FOR TRACK
  2697                              <1> 	; 10/08/2022
  2698 00004ADB 3A6C241D            <1> 	cmp	ch, [esp+29] ; CH = TRACK #
  2699 00004ADF 7404                <1> 	jz	short SAME_TRK		; IF SAME TRACK NO INCREASE
  2700 00004AE1 00E3                <1> 	add	bl, ah			; ADD SECTORS/TRACK
  2701                              <1> DIF_HD:
  2702 00004AE3 00E3                <1> 	add	bl, ah			; ADD SECTORS/TRACK
  2703                              <1> SAME_TRK:
  2704                              <1> 	;sub	bl, [ebp]		; SUBTRACT START FROM END
  2705                              <1> 	; 10/08/2022
  2706 00004AE5 2A5C241C            <1> 	sub	bl, [esp+28] ; CL = SECTOR #	
  2707 00004AE9 88D8                <1> 	mov	al, bl			; TO AL
  2708                              <1> NT_OUT:
  2709 00004AEB C3                  <1> 	retn
  2710                              <1> 
  2711                              <1> ;-------------------------------------------------------------------------------
  2712                              <1> ; SETUP_DBL
  2713                              <1> ;	CHECK DOUBLE STEP.
  2714                              <1> ;
  2715                              <1> ; ON ENTRY :	DI = DRIVE
  2716                              <1> ;
  2717                              <1> ; ON EXIT :	CY = 1 MEANS ERROR
  2718                              <1> ;-------------------------------------------------------------------------------
  2719                              <1> SETUP_DBL:
  2720                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  2721 00004AEC 8AA7[DB770100]      <1> 	mov	ah, [DSK_STATE+edi]	; ACCESS STATE
  2722 00004AF2 F6C410              <1> 	test	ah, MED_DET		; ESTABLISHED STATE ?
  2723 00004AF5 7578                <1> 	jnz	short NO_DBL		; IF ESTABLISHED THEN DOUBLE DONE
  2724                              <1> 
  2725                              <1> ;-----	CHECK FOR TRACK 0 TO SPEED UP ACKNOWLEDGE OF UNFORMATTED DISKETTE
  2726                              <1> 
  2727 00004AF7 C605[CD770100]00    <1> 	mov	byte [SEEK_STATUS], 0	; SET RECALIBRATE REQUIRED ON ALL DRIVES
  2728 00004AFE E8CE000000          <1> 	call	MOTOR_ON		; ENSURE MOTOR STAY ON
  2729 00004B03 B500                <1> 	mov	ch, 0			; LOAD TRACK 0
  2730 00004B05 E8B9010000          <1> 	call	SEEK			; SEEK TO TRACK 0
  2731 00004B0A E861000000          <1> 	call	READ_ID			; READ ID FUNCTION
  2732 00004B0F 7243                <1> 	jc	short SD_ERR		; IF ERROR NO TRACK 0
  2733                              <1> 
  2734                              <1> ;-----	INITIALIZE START AND MAX TRACKS (TIMES 2 FOR BOTH HEADS)
  2735                              <1> 
  2736 00004B11 66B95004            <1> 	mov	cx, 0450h 		; START, MAX TRACKS
  2737 00004B15 F687[DB770100]01    <1> 	test	byte [DSK_STATE+edi], TRK_CAPA ; TEST FOR 80 TRACK CAPABILITY
  2738 00004B1C 7402                <1> 	jz	short CNT_OK		; IF NOT COUNT IS SETUP
  2739 00004B1E B1A0                <1> 	mov	cl, 0A0h		; MAXIMUM TRACK 1.2 MB
  2740                              <1> 
  2741                              <1> ;	ATTEMPT READ ID OF ALL TRACKS, ALL HEADS UNTIL SUCCESS; UPON SUCCESS,
  2742                              <1> ;	MUST SEE IF ASKED FOR TRACK IN SINGLE STEP MODE = TRACK ID READ; IF NOT
  2743                              <1> ;	THEN SET DOUBLE STEP ON.
  2744                              <1> 
  2745                              <1> CNT_OK:
  2746                              <1> 	; 11/04/2021 (32 bit push/pop)
  2747 00004B20 C605[CF770100]FF    <1>         mov     byte [MOTOR_COUNT], 0FFh ; ENSURE MOTOR STAYS ON FOR OPERATION
  2748 00004B27 51                  <1> 	push	ecx			; SAVE TRACK, COUNT
  2749 00004B28 C605[D0770100]00    <1> 	mov	byte [DSKETTE_STATUS], 0 ; CLEAR STATUS, EXPECT ERRORS
  2750                              <1> 	;xor	ax, ax			; CLEAR AX
  2751                              <1> 	; 06/08/2022
  2752 00004B2F 31C0                <1> 	xor	eax, eax
  2753 00004B31 D0ED                <1> 	shr	ch, 1			; HALVE TRACK, CY = HEAD
  2754 00004B33 C0D003              <1> 	rcl	al, 3			; AX = HEAD IN CORRECT BIT
  2755 00004B36 50                  <1> 	push	eax			; SAVE HEAD
  2756 00004B37 E887010000          <1> 	call	SEEK			; SEEK TO TRACK
  2757 00004B3C 58                  <1> 	pop	eax			; RESTORE HEAD
  2758                              <1> 	;or	di, ax			; DI = HEAD OR'ED DRIVE
  2759                              <1> 	; 06/08/2022
  2760 00004B3D 09C7                <1> 	or	edi, eax
  2761 00004B3F E82C000000          <1> 	call	READ_ID			; READ ID HEAD 0
  2762 00004B44 9C                  <1> 	pushf				; SAVE RETURN FROM READ_ID
  2763 00004B45 6681E7FB00          <1> 	and	di, 11111011b		; TURN OFF HEAD 1 BIT
  2764 00004B4A 9D                  <1> 	popf				; RESTORE ERROR RETURN
  2765 00004B4B 59                  <1> 	pop	ecx			; RESTORE COUNT
  2766 00004B4C 7308                <1> 	jnc	short DO_CHK		; IF OK, ASKED = RETURNED TRACK ?
  2767 00004B4E FEC5                <1> 	inc	ch			; INC FOR NEXT TRACK
  2768 00004B50 38CD                <1> 	cmp	ch, cl			; REACHED MAXIMUM YET
  2769 00004B52 75CC                <1> 	jnz	short CNT_OK		; CONTINUE TILL ALL TRIED
  2770                              <1> 
  2771                              <1> ;-----	FALL THRU, READ ID FAILED FOR ALL TRACKS
  2772                              <1> 
  2773                              <1> SD_ERR:	
  2774 00004B54 F9                  <1> 	stc				; SET CARRY FOR ERROR
  2775 00004B55 C3                  <1> 	retn				; SETUP_DBL ERROR EXIT
  2776                              <1> 
  2777                              <1> DO_CHK:
  2778 00004B56 8A0D[D4770100]      <1> 	mov	cl, [NEC_STATUS+3]	; LOAD RETURNED TRACK
  2779 00004B5C 888F[DD770100]      <1> 	mov	[DSK_TRK+edi], cl	; STORE TRACK NUMBER
  2780 00004B62 D0ED                <1> 	shr	ch, 1			; HALVE TRACK
  2781 00004B64 38CD                <1> 	cmp	ch, cl			; IS IT THE SAME AS ASKED FOR TRACK
  2782 00004B66 7407                <1> 	jz	short NO_DBL		; IF SAME THEN NO DOUBLE STEP
  2783 00004B68 808F[DB770100]20    <1> 	or	byte [DSK_STATE+edi], DBL_STEP ; TURN ON DOUBLE STEP REQUIRED
  2784                              <1> NO_DBL:
  2785                              <1> 	; 06/08/2022
  2786                              <1> 	;clc				; CLEAR ERROR FLAG
  2787 00004B6F C3                  <1> 	retn
  2788                              <1> 
  2789                              <1> ;-------------------------------------------------------------------------------
  2790                              <1> ; READ_ID
  2791                              <1> ;	READ ID FUNCTION.
  2792                              <1> ;
  2793                              <1> ; ON ENTRY:	DI : BIT 2 = HEAD; BITS 1,0 = DRIVE
  2794                              <1> ;
  2795                              <1> ; ON EXIT: 	DI : BIT 2 IS RESET, BITS 1,0 = DRIVE
  2796                              <1> ;		@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION
  2797                              <1> ;-------------------------------------------------------------------------------
  2798                              <1> READ_ID:
  2799                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  2800 00004B70 B8[8C4B0000]        <1> 	mov	eax, ER_3		; MOVE NEC OUTPUT ERROR ADDRESS
  2801 00004B75 50                  <1> 	push	eax
  2802 00004B76 B44A                <1> 	mov	ah, 4Ah			; READ ID COMMAND
  2803 00004B78 E80F010000          <1> 	call	NEC_OUTPUT		; TO CONTROLLER
  2804                              <1> 	;mov	ax, di			; DRIVE # TO AH, HEAD 0
  2805                              <1> 	; 06/08/2022
  2806 00004B7D 89F8                <1> 	mov	eax, edi
  2807 00004B7F 88C4                <1> 	mov	ah, al
  2808 00004B81 E806010000          <1> 	call	NEC_OUTPUT		; TO CONTROLLER
  2809 00004B86 E836FEFFFF          <1> 	call	NEC_TERM		; WAIT FOR OPERATION, GET STATUS
  2810 00004B8B 58                  <1> 	pop	eax			; THROW AWAY ERROR ADDRESS
  2811                              <1> ER_3:
  2812 00004B8C C3                  <1> 	retn
  2813                              <1> 
  2814                              <1> ;-------------------------------------------------------------------------------
  2815                              <1> ; CMOS_TYPE
  2816                              <1> ;	RETURNS DISKETTE TYPE FROM CMOS
  2817                              <1> ;
  2818                              <1> ; ON ENTRY:	DI = DRIVE #
  2819                              <1> ;
  2820                              <1> ; ON EXIT:	AL = TYPE; CY REFLECTS STATUS
  2821                              <1> ;-------------------------------------------------------------------------------
  2822                              <1> 
  2823                              <1> CMOS_TYPE: ; 11/12/2014
  2824 00004B8D 8A87[7C650000]      <1> 	mov	al, [edi+fd0_type]
  2825 00004B93 20C0                <1> 	and 	al, al ; 18/12/2014
  2826 00004B95 C3                  <1> 	retn
  2827                              <1> 
  2828                              <1> ;CMOS_TYPE:
  2829                              <1> ;	mov	al, CMOS_DIAG		; CMOS DIAGNOSTIC STATUS BYTE ADDRESS
  2830                              <1> ;	call	CMOS_READ		; GET CMOS STATUS
  2831                              <1> ;	test	al, BAD_BAT+BAD_CKSUM	; BATTERY GOOD AND CHECKSUM VALID
  2832                              <1> ;	stc				; SET CY = 1 INDICATING ERROR FOR RETURN
  2833                              <1> ;	jnz	short BAD_CM		; ERROR IF EITHER BIT ON
  2834                              <1> ;	mov	al, CMOS_DISKETTE	; ADDRESS OF DISKETTE BYTE IN CMOS
  2835                              <1> ;	call	CMOS_READ		; GET DISKETTE BYTE
  2836                              <1> ;	or	di, di			; SEE WHICH DRIVE IN QUESTION
  2837                              <1> ;	jnz	short TB		; IF DRIVE 1, DATA IN LOW NIBBLE
  2838                              <1> ;	ror	al, 4			; EXCHANGE NIBBLES IF SECOND DRIVE
  2839                              <1> ;TB:
  2840                              <1> ;	and	al, 0Fh			; KEEP ONLY DRIVE DATA, RESET CY, 0
  2841                              <1> ;BAD_CM:
  2842                              <1> ;	retn				; CY, STATUS OF READ
  2843                              <1> 
  2844                              <1> ;-------------------------------------------------------------------------------
  2845                              <1> ; GET_PARM
  2846                              <1> ;	THIS ROUTINE FETCHES THE INDEXED POINTER FROM THE DISK_BASE
  2847                              <1> ;	BLOCK POINTED TO BY THE DATA VARIABLE @DISK_POINTER. A BYTE FROM
  2848                              <1> ;	THAT TABLE IS THEN MOVED INTO AH, THE INDEX OF THAT BYTE BEING
  2849                              <1> ;	THE PARAMETER IN DL.
  2850                              <1> ;
  2851                              <1> ; ON ENTRY:	DL = INDEX OF BYTE TO BE FETCHED
  2852                              <1> ;
  2853                              <1> ; ON EXIT:	AH = THAT BYTE FROM BLOCK
  2854                              <1> ;		AL, DH DESTROYED
  2855                              <1> ;-------------------------------------------------------------------------------
  2856                              <1> GET_PARM:
  2857                              <1> 	; 09/08/2022
  2858                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  2859                              <1> 	; AL = INDEX
  2860                              <1> 	; EDI = (current) DRIVE #
  2861                              <1> 	;;push	ds
  2862                              <1> 	;push	esi
  2863                              <1>     	;;sub	ax, ax			; DS = 0, BIOS DATA AREA
  2864                              <1>     	;;mov	ds, ax
  2865                              <1> 	;;mov	ax, cs
  2866                              <1> 	;;mov	ds, ax
  2867                              <1> 	; 08/02/2015 (protected mode modifications, bx -> ebx)
  2868                              <1> 	;xchg	edx, ebx		; BL = INDEX
  2869                              <1> 	; 06/08/2022
  2870 00004B96 53                  <1> 	push	ebx			; SAVE EBX	
  2871                              <1> 	;movzx	ebx, dl			; EBX = INDEX
  2872 00004B97 0FB6D8              <1> 	movzx	ebx, al ; 06/08/2022
  2873                              <1> 	;;sub	bh, bh			; BX = INDEX
  2874                              <1> 	;and	ebx, 0FFh
  2875                              <1>     	;;lds	si, [DISK_POINTER]	; POINT TO BLOCK
  2876                              <1> 	;
  2877                              <1> 	; 17/12/2014
  2878                              <1> 	;mov	ax, [cfd]		; current (AL) and previous fd (AH)
  2879                              <1> 	; 06/08/2022
  2880 00004B9A 89F8                <1> 	mov	eax, edi		; EDI = DRIVE #
  2881                              <1> 	;cmp	al, ah
  2882 00004B9C 3A05[6D650000]      <1> 	cmp	al, [pfd]	
  2883 00004BA2 7423                <1> 	je	short gpndc
  2884 00004BA4 A2[6D650000]        <1> 	mov	[pfd], al		; current drive -> previous drive
  2885 00004BA9 53                  <1> 	push	ebx ; 08/02/2015
  2886                              <1> 	;mov	bl, al 
  2887                              <1> 	;; 11/12/2014
  2888                              <1> 	;mov	al, [ebx+fd0_type]	; Drive type (0,1,2,3,4)
  2889                              <1> 	; 09/08/2022
  2890 00004BAA 8A87[7C650000]      <1> 	mov	al, [edi+fd0_type]	; Drive type (0,1,2,3,4)
  2891                              <1> 	; 18/12/2014
  2892 00004BB0 20C0                <1> 	and	al, al
  2893 00004BB2 7507                <1> 	jnz	short gpdtc
  2894 00004BB4 BB[57650000]        <1> 	mov	ebx, MD_TBL6		; 1.44 MB param. tbl. (default)
  2895 00004BB9 EB05                <1>         jmp     short gpdpu
  2896                              <1> gpdtc:	
  2897 00004BBB E809FBFFFF          <1> 	call	DR_TYPE_CHECK
  2898                              <1> 	; cf = 1 -> ebx points to 1.44MB fd parameter table (default)
  2899                              <1> gpdpu:
  2900 00004BC0 891D[F4640000]      <1> 	mov	[DISK_POINTER], ebx
  2901 00004BC6 5B                  <1> 	pop	ebx
  2902                              <1> gpndc:
  2903                              <1> 	;mov	esi, [DISK_POINTER] ; 08/02/2015, si -> esi
  2904                              <1> 	; 06/08/2022
  2905 00004BC7 031D[F4640000]      <1> 	add	ebx, [DISK_POINTER]
  2906                              <1> 	;mov	ah, [esi+ebx]		; GET THE WORD
  2907 00004BCD 8A23                <1> 	mov	ah, [ebx]
  2908                              <1> 	;xchg	edx, ebx		; RESTORE BX
  2909                              <1> 	; 06/08/2022
  2910 00004BCF 5B                  <1> 	pop	ebx			; RESTORE EBX
  2911                              <1> 	;pop	esi
  2912                              <1> 	;;pop	ds
  2913 00004BD0 C3                  <1> 	retn
  2914                              <1> 
  2915                              <1> ;-------------------------------------------------------------------------------
  2916                              <1> ; MOTOR_ON
  2917                              <1> ;	TURN MOTOR ON AND WAIT FOR MOTOR START UP TIME. THE @MOTOR_COUNT
  2918                              <1> ;	IS REPLACED WITH A SUFFICIENTLY HIGH NUMBER (0FFH) TO ENSURE
  2919                              <1> ;	THAT THE MOTOR DOES NOT GO OFF DURING THE OPERATION. IF THE
  2920                              <1> ;	MOTOR NEEDED TO BE TURNED ON, THE MULTI-TASKING HOOK FUNCTION
  2921                              <1> ;	(AX=90FDH, INT 15) IS CALLED TELLING THE OPERATING SYSTEM
  2922                              <1> ;	THAT THE BIOS IS ABOUT TO WAIT FOR MOTOR START UP. IF THIS
  2923                              <1> ;	FUNCTION RETURNS WITH CY = 1, IT MEANS THAT THE MINIMUM WAIT
  2924                              <1> ;	HAS BEEN COMPLETED. AT THIS POINT A CHECK IS MADE TO ENSURE
  2925                              <1> ;	THAT THE MOTOR WASN'T TURNED OFF BY THE TIMER. IF THE HOOK DID
  2926                              <1> ;	NOT WAIT, THE WAIT FUNCTION (AH=086H) IS CALLED TO WAIT THE
  2927                              <1> ;	PRESCRIBED AMOUNT OF TIME. IF THE CARRY FLAG IS SET ON RETURN,
  2928                              <1> ;	IT MEANS THAT THE FUNCTION IS IN USE AND DID NOT PERFORM THE
  2929                              <1> ;	WAIT. A TIMER 1 WAIT LOOP WILL THEN DO THE WAIT.
  2930                              <1> ;
  2931                              <1> ; ON ENTRY:	DI = DRIVE #
  2932                              <1> ; ON EXIT:	AX,CX,DX DESTROYED
  2933                              <1> ;-------------------------------------------------------------------------------
  2934                              <1> MOTOR_ON:
  2935                              <1> 	; 06/08/2022 - TRDOS 386 Kernel v2.0.5
  2936 00004BD1 53                  <1> 	push	ebx			; SAVE REG.
  2937 00004BD2 E825000000          <1> 	call	TURN_ON			; TURN ON MOTOR
  2938 00004BD7 7221                <1> 	jc	short MOT_IS_ON		; IF CY=1 NO WAIT
  2939                              <1> 	; 06/08/2022
  2940                              <1> 	;call	XLAT_OLD		; TRANSLATE STATE TO COMPATIBLE MODE
  2941 00004BD9 E851FBFFFF          <1> 	call	XLAT_NEW		; TRANSLATE STATE TO PRESENT ARCH,
  2942                              <1> 	;call	TURN_ON 		; CHECK AGAIN IF MOTOR ON
  2943                              <1> 	;jc	short MOT_IS_ON		; IF NO WAIT MEANS IT IS ON
  2944                              <1> M_WAIT:
  2945                              <1> 	;mov	dl, 10			; GET THE MOTOR WAIT PARAMETER
  2946                              <1> 	; 06/08/2022
  2947 00004BDE B00A                <1> 	mov	al, 10
  2948 00004BE0 E8B1FFFFFF          <1> 	call	GET_PARM
  2949                              <1> 	;mov	al, ah			; AL = MOTOR WAIT PARAMETER
  2950                              <1> 	;xor	ah, ah			; AX = MOTOR WAIT PARAMETER
  2951                              <1> 	;cmp	al, 8			; SEE IF AT LEAST A SECOND IS SPECIFIED
  2952 00004BE5 80FC08              <1> 	cmp	ah, 8
  2953                              <1> 	;jae	short GP2		; IF YES, CONTINUE
  2954 00004BE8 7702                <1> 	ja	short J13
  2955                              <1> 	;mov	al, 8			; ONE SECOND WAIT FOR MOTOR START UP
  2956 00004BEA B408                <1> 	mov	ah, 8
  2957                              <1> 
  2958                              <1> ;-----	AS CONTAINS NUMBER OF 1/8 SECONDS (125000 MICROSECONDS) TO WAIT
  2959                              <1> GP2:	
  2960                              <1> ;----- 	FOLLOWING LOOPS REQUIRED WHEN RTC WAIT FUNCTION IS ALREADY IN USE
  2961                              <1> J13:					; WAIT FOR 1/8 SECOND PER (AL)
  2962                              <1> 	;mov	ecx, 8286		; COUNT FOR 1/8 SECOND AT 15.085737 US
  2963                              <1> 	; 11/04/2021
  2964 00004BEC B947100000          <1> 	mov	ecx, 4167 ; count of 30 micro seconds * (1/8) 
  2965 00004BF1 E8C1D7FFFF          <1> 	call	WAITF			; GO TO FIXED WAIT ROUTINE
  2966                              <1> 	;dec	al			; DECREMENT TIME VALUE
  2967 00004BF6 FECC                <1> 	dec	ah
  2968 00004BF8 75F2                <1> 	jnz	short J13		; ARE WE DONE YET
  2969                              <1> MOT_IS_ON:
  2970 00004BFA 5B                  <1> 	pop	ebx			; RESTORE REG.
  2971 00004BFB C3                  <1> 	retn
  2972                              <1> 
  2973                              <1> ;-------------------------------------------------------------------------------
  2974                              <1> ; TURN_ON
  2975                              <1> ;	TURN MOTOR ON AND RETURN WAIT STATE.
  2976                              <1> ;
  2977                              <1> ; ON ENTRY:	DI = DRIVE #
  2978                              <1> ;
  2979                              <1> ; ON EXIT:	CY = 0 MEANS WAIT REQUIRED
  2980                              <1> ;		CY = 1 MEANS NO WAIT REQUIRED
  2981                              <1> ;		AX,BX,CX,DX DESTROYED
  2982                              <1> ;-------------------------------------------------------------------------------
  2983                              <1> TURN_ON:
  2984 00004BFC 89FB                <1> 	mov	ebx, edi		; BX = DRIVE #
  2985 00004BFE 88D9                <1> 	mov	cl, bl			; CL = DRIVE #
  2986 00004C00 C0C304              <1> 	rol	bl, 4			; BL = DRIVE SELECT
  2987 00004C03 FA                  <1> 	cli				; NO INTERRUPTS WHILE DETERMINING STATUS
  2988 00004C04 C605[CF770100]FF    <1> 	mov	byte [MOTOR_COUNT], 0FFh ; ENSURE MOTOR STAYS ON FOR OPERATION
  2989 00004C0B A0[CE770100]        <1> 	mov	al, [MOTOR_STATUS]	; GET DIGITAL OUTPUT REGISTER REFLECTION
  2990 00004C10 2430                <1> 	and	al, 00110000b		; KEEP ONLY DRIVE SELECT BITS
  2991 00004C12 B401                <1> 	mov	ah, 1			; MASK FOR DETERMINING MOTOR BIT
  2992 00004C14 D2E4                <1> 	shl	ah, cl			; AH = MOTOR ON, A=00000001, B=00000010
  2993                              <1> 
  2994                              <1> ;  AL = DRIVE SELECT FROM @MOTOR_STATUS
  2995                              <1> ;  BL = DRIVE SELECT DESIRED
  2996                              <1> ;  AH = MOTOR ON MASK DESIRED
  2997                              <1> 
  2998 00004C16 38D8                <1> 	cmp	al, bl			; REQUESTED DRIVE ALREADY SELECTED ?
  2999 00004C18 7508                <1> 	jnz	short TURN_IT_ON	; IF NOT SELECTED JUMP
  3000 00004C1A 8425[CE770100]      <1> 	test	ah, [MOTOR_STATUS]	; TEST MOTOR ON BIT
  3001 00004C20 7535                <1> 	jnz	short NO_MOT_WAIT	; JUMP IF MOTOR ON AND SELECTED
  3002                              <1> 
  3003                              <1> TURN_IT_ON:
  3004 00004C22 08DC                <1> 	or	ah, bl			; AH = DRIVE SELECT AND MOTOR ON
  3005 00004C24 8A3D[CE770100]      <1> 	mov	bh, [MOTOR_STATUS]	; SAVE COPY OF @MOTOR_STATUS BEFORE
  3006 00004C2A 80E70F              <1> 	and	bh, 00001111b		; KEEP ONLY MOTOR BITS
  3007 00004C2D 8025[CE770100]CF    <1> 	and	byte [MOTOR_STATUS], 11001111b ; CLEAR OUT DRIVE SELECT
  3008 00004C34 0825[CE770100]      <1> 	or	[MOTOR_STATUS], ah	; OR IN DRIVE SELECTED AND MOTOR ON
  3009 00004C3A A0[CE770100]        <1> 	mov	al, [MOTOR_STATUS]	; GET DIGITAL OUTPUT REGISTER REFLECTION
  3010 00004C3F 88C3                <1> 	mov	bl, al			; BL=@MOTOR_STATUS AFTER, BH=BEFORE
  3011 00004C41 80E30F              <1> 	and	bl, 00001111b		; KEEP ONLY MOTOR BITS
  3012 00004C44 FB                  <1> 	sti				; ENABLE INTERRUPTS AGAIN
  3013 00004C45 243F                <1> 	and	al, 00111111b		; STRIP AWAY UNWANTED BITS
  3014 00004C47 C0C004              <1> 	rol	al, 4			; PUT BITS IN DESIRED POSITIONS
  3015 00004C4A 0C0C                <1> 	or	al, 00001100b		; NO RESET, ENABLE DMA/INTERRUPT
  3016 00004C4C 66BAF203            <1> 	mov	dx, 03F2h		; SELECT DRIVE AND TURN ON MOTOR
  3017 00004C50 EE                  <1> 	out	dx, al
  3018 00004C51 38FB                <1> 	cmp	bl, bh			; NEW MOTOR TURNED ON ?
  3019                              <1> 	;jz	short NO_MOT_WAIT	; NO WAIT REQUIRED IF JUST SELECT
  3020 00004C53 7403                <1> 	je	short no_mot_w1 ; 27/02/2015 
  3021 00004C55 F8                  <1> 	clc				; (re)SET CARRY MEANING WAIT
  3022 00004C56 C3                  <1> 	retn
  3023                              <1> 
  3024                              <1> NO_MOT_WAIT:
  3025 00004C57 FB                  <1> 	sti
  3026                              <1> no_mot_w1: ; 27/02/2015
  3027 00004C58 F9                  <1> 	stc				; SET NO WAIT REQUIRED
  3028                              <1> 	;sti				; INTERRUPTS BACK ON
  3029 00004C59 C3                  <1> 	retn
  3030                              <1> 
  3031                              <1> ;-------------------------------------------------------------------------------
  3032                              <1> ; HD_WAIT
  3033                              <1> ;	WAIT FOR HEAD SETTLE TIME.
  3034                              <1> ;
  3035                              <1> ; ON ENTRY:	DI = DRIVE #
  3036                              <1> ;
  3037                              <1> ; ON EXIT:	AX,BX,CX,DX DESTROYED
  3038                              <1> ;-------------------------------------------------------------------------------
  3039                              <1> HD_WAIT:
  3040                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  3041                              <1> 	;mov	dl,9			; GET HEAD SETTLE PARAMETER
  3042                              <1> 	; 06/08/2022
  3043 00004C5A B009                <1> 	mov	al, 9
  3044 00004C5C E835FFFFFF          <1> 	call	GET_PARM
  3045 00004C61 08E4                <1> 	or	ah, ah	; 17/12/2014
  3046 00004C63 7519                <1> 	jnz	short DO_WAT
  3047 00004C65 F605[CE770100]80    <1>         test    byte [MOTOR_STATUS], 10000000b ; SEE IF A WRITE OPERATION
  3048                              <1> 	;jz	short ISNT_WRITE	; IF NOT, DO NOT ENFORCE ANY VALUES
  3049                              <1> 	;or	ah, ah			; CHECK FOR ANY WAIT?
  3050                              <1> 	;jnz	short DO_WAT		; IF THERE DO NOT ENFORCE
  3051 00004C6C 741D                <1> 	jz	short HW_DONE
  3052 00004C6E B40F                <1> 	mov	ah, HD12_SETTLE		; LOAD 1.2M HEAD SETTLE MINIMUM
  3053 00004C70 8A87[DB770100]      <1> 	mov	al, [DSK_STATE+edi]	; LOAD STATE
  3054 00004C76 24C0                <1> 	and	al, RATE_MSK		; KEEP ONLY RATE
  3055 00004C78 3C80                <1> 	cmp	al, RATE_250		; 1.2 M DRIVE ?
  3056 00004C7A 7502                <1> 	jnz	short DO_WAT		; DEFAULT HEAD SETTLE LOADED
  3057                              <1> ;GP3:
  3058 00004C7C B414                <1> 	mov	ah, HD320_SETTLE	; USE 320/360 HEAD SETTLE
  3059                              <1> ;	jmp	short DO_WAT
  3060                              <1> 
  3061                              <1> ;ISNT_WRITE:
  3062                              <1> ;	or	ah, ah			; CHECK FOR NO WAIT
  3063                              <1> ;	jz	short HW_DONE		; IF NOT WRITE AND 0 ITS OK
  3064                              <1> 
  3065                              <1> ;-----	AH CONTAINS NUMBER OF MILLISECONDS TO WAIT
  3066                              <1> DO_WAT:
  3067                              <1> ;	mov	al, ah			; AL = # MILLISECONDS
  3068                              <1> ;	;xor	ah, ah			; AX = # MILLISECONDS
  3069                              <1> J29:					; 	1 MILLISECOND LOOP
  3070                              <1> 	;;mov	cx, WAIT_FDU_HEAD_SETTLE ; 33 ; 1 ms in 30 micro units.
  3071                              <1> 	;mov	ecx, 66			; COUNT AT 15.085737 US PER COUNT
  3072                              <1> 	; 11/04/2021
  3073                              <1> 	;mov	ecx, WAIT_FDU_HEAD_SETTLE ; 33
  3074                              <1> 	; 06/08/2022
  3075 00004C7E 29C9                <1> 	sub	ecx, ecx
  3076 00004C80 B121                <1> 	mov	cl, WAIT_FDU_HEAD_SETTLE ; 33
  3077 00004C82 E830D7FFFF          <1> 	call	WAITF			; DELAY FOR 1 MILLISECOND
  3078                              <1> 	;dec	al			; DECREMENT THE COUNT
  3079 00004C87 FECC                <1> 	dec	ah
  3080 00004C89 75F3                <1> 	jnz	short J29		; DO AL MILLISECOND # OF TIMES
  3081                              <1> HW_DONE:
  3082 00004C8B C3                  <1> 	retn
  3083                              <1> 
  3084                              <1> ;-------------------------------------------------------------------------------
  3085                              <1> ; NEC_OUTPUT
  3086                              <1> ;	THIS ROUTINE SENDS A BYTE TO THE NEC CONTROLLER AFTER TESTING
  3087                              <1> ;	FOR CORRECT DIRECTION AND CONTROLLER READY THIS ROUTINE WILL
  3088                              <1> ;	TIME OUT IF THE BYTE IS NOT ACCEPTED WITHIN A REASONABLE AMOUNT
  3089                              <1> ;	OF TIME, SETTING THE DISKETTE STATUS ON COMPLETION.
  3090                              <1> ; 
  3091                              <1> ; ON ENTRY: 	AH = BYTE TO BE OUTPUT
  3092                              <1> ;
  3093                              <1> ; ON EXIT:	CY = 0  SUCCESS
  3094                              <1> ;		CY = 1  FAILURE -- DISKETTE STATUS UPDATED
  3095                              <1> ;		        IF A FAILURE HAS OCCURRED, THE RETURN IS MADE ONE LEVEL
  3096                              <1> ;		        HIGHER THAN THE CALLER OF NEC OUTPUT. THIS REMOVES THE
  3097                              <1> ;		        REQUIREMENT OF TESTING AFTER EVERY CALL OF NEC_OUTPUT.
  3098                              <1> ;		AX,CX,DX DESTROYED
  3099                              <1> ;-------------------------------------------------------------------------------
  3100                              <1> 
  3101                              <1> ; 09/12/2014 [Erdogan Tan] 
  3102                              <1> ;	(from 'PS2 Hardware Interface Tech. Ref. May 88', Page 09-05.)
  3103                              <1> ; Diskette Drive Controller Status Register (3F4h)
  3104                              <1> ;	This read only register facilitates the transfer of data between
  3105                              <1> ;	the system microprocessor and the controller.
  3106                              <1> ; Bit 7 - When set to 1, the Data register is ready to transfer data 
  3107                              <1> ;	  with the system micrprocessor.
  3108                              <1> ; Bit 6 - The direction of data transfer. If this bit is set to 0,
  3109                              <1> ;	  the transfer is to the controller.
  3110                              <1> ; Bit 5 - When this bit is set to 1, the controller is in the non-DMA mode.
  3111                              <1> ; Bit 4 - When this bit is set to 1, a Read or Write command is being executed.
  3112                              <1> ; Bit 3 - Reserved.
  3113                              <1> ; Bit 2 - Reserved.
  3114                              <1> ; Bit 1 - When this bit is set to 1, dskette drive 1 is in the seek mode.
  3115                              <1> ; Bit 0 - When this bit is set to 1, dskette drive 1 is in the seek mode.
  3116                              <1> 
  3117                              <1> ; Data Register (3F5h)
  3118                              <1> ; This read/write register passes data, commands and parameters, and provides
  3119                              <1> ; diskette status information.
  3120                              <1>   		
  3121                              <1> NEC_OUTPUT:
  3122                              <1> 	; 09/08/2022
  3123                              <1> 	; 06/08/2022 - TRDOS 386 Kernel v2.0.5
  3124                              <1> 	;
  3125                              <1> 	;push	bx			; SAVE REG.
  3126 00004C8C 66BAF403            <1> 	mov	dx, 03F4h		; STATUS PORT
  3127                              <1> 	;mov	bl,2			; HIGH ORDER COUNTER
  3128                              <1> 	;xor	cx, cx			; COUNT FOR TIME OUT
  3129                              <1> 	; 16/12/2014
  3130                              <1> 	; waiting for (max.) 0.5 seconds
  3131                              <1>         ;;mov	byte [wait_count], 0 ;; 27/02/2015
  3132                              <1> 	;
  3133                              <1> 	; 17/12/2014
  3134                              <1> 	; Modified from AWARD BIOS 1999 - ADISK.ASM - SEND_COMMAND
  3135                              <1> 	;
  3136                              <1> 	;WAIT_FOR_PORT:	Waits for a bit at a port pointed to by DX to
  3137                              <1> 	;		go on.
  3138                              <1> 	;INPUT:
  3139                              <1> 	;	AH=Mask for isolation bits.
  3140                              <1> 	;	AL=pattern to look for.
  3141                              <1> 	;	DX=Port to test for
  3142                              <1> 	;	BH:CX=Number of memory refresh periods to delay.
  3143                              <1> 	;	     (normally 30 microseconds per period.)
  3144                              <1> 	;
  3145                              <1> 	;WFP_SHORT:  
  3146                              <1> 	;	Wait for port if refresh cycle is short (15-80 Us range).
  3147                              <1> 	;
  3148                              <1> 
  3149                              <1> ;	mov	bl, WAIT_FDU_SEND_HI+1	; 0+1
  3150                              <1> ;	mov	cx, WAIT_FDU_SEND_LO	; 16667
  3151 00004C90 B91B410000          <1> 	mov	ecx, WAIT_FDU_SEND_LH   ; 16667 (27/02/2015)
  3152                              <1> ;
  3153                              <1> ;WFPS_OUTER_LP:
  3154                              <1> ;	;
  3155                              <1> ;WFPS_CHECK_PORT:
  3156                              <1> J23:
  3157 00004C95 EC                  <1> 	in	al, dx			; GET STATUS
  3158 00004C96 24C0                <1> 	and	al, 11000000b		; KEEP STATUS AND DIRECTION
  3159 00004C98 3C80                <1> 	cmp	al, 10000000b		; STATUS 1 AND DIRECTION 0 ?
  3160 00004C9A 7418                <1> 	jz	short J27		; STATUS AND DIRECTION OK
  3161                              <1> WFPS_HI:
  3162 00004C9C E461                <1> 	in	al, PORT_B  ; 061h	; SYS1	; wait for hi to lo
  3163 00004C9E A810                <1> 	test	al, 010h		; transition on memory
  3164 00004CA0 75FA                <1> 	jnz	short WFPS_HI		; refresh.
  3165                              <1> WFPS_LO:
  3166 00004CA2 E461                <1> 	in	al, PORT_B		; SYS1
  3167 00004CA4 A810                <1> 	test	al, 010h
  3168 00004CA6 74FA                <1> 	jz	short WFPS_LO
  3169                              <1> 	;loop	short WFPS_CHECK_PORT
  3170 00004CA8 E2EB                <1> 	loop	J23	; 27/02/2015
  3171                              <1> ;	;
  3172                              <1> ;	dec	bl
  3173                              <1> ;	jnz	short WFPS_OUTER_LP
  3174                              <1> ;	jmp	short WFPS_TIMEOUT	; fail
  3175                              <1> ;J23:
  3176                              <1> ;	in	al, dx			; GET STATUS
  3177                              <1> ;	and	al, 11000000b		; KEEP STATUS AND DIRECTION
  3178                              <1> ;	cmp	al, 10000000b		; STATUS 1 AND DIRECTION 0 ?
  3179                              <1> ;	jz	short J27		; STATUS AND DIRECTION OK
  3180                              <1> 	;loop	J23			; CONTINUE TILL CX EXHAUSTED
  3181                              <1> 	;dec	bl			; DECREMENT COUNTER
  3182                              <1> 	;jnz	short J23		; REPEAT TILL DELAY FINISHED, CX = 0
  3183                              <1>    
  3184                              <1> 	;;27/02/2015
  3185                              <1> 	;16/12/2014
  3186                              <1>         ;;cmp	byte [wait_count], 10   ; (10/18.2 seconds)
  3187                              <1> 	;;jb	short J23
  3188                              <1> 
  3189                              <1> ;WFPS_TIMEOUT:
  3190                              <1> 
  3191                              <1> ;-----	FALL THRU TO ERROR RETURN
  3192                              <1> 
  3193 00004CAA 800D[D0770100]80    <1> 	or	byte [DSKETTE_STATUS], TIME_OUT
  3194                              <1> 	;pop	bx			; RESTORE REG.
  3195 00004CB1 58                  <1> 	pop	eax ; 08/02/2015	; DISCARD THE RETURN ADDRESS
  3196 00004CB2 F9                  <1> 	stc				; INDICATE ERROR TO CALLER
  3197 00004CB3 C3                  <1> 	retn
  3198                              <1> 
  3199                              <1> ;-----	DIRECTION AND STATUS OK; OUTPUT BYTE
  3200                              <1> 
  3201                              <1> J27:	
  3202 00004CB4 88E0                <1> 	mov	al, ah			; GET BYTE TO OUTPUT
  3203                              <1> 	;inc	dx			; DATA PORT = STATUS PORT + 1
  3204                              <1> 	; 06/08/2022
  3205 00004CB6 FEC2                <1> 	inc	dl
  3206 00004CB8 EE                  <1> 	out	dx, al			; OUTPUT THE BYTE
  3207                              <1> 	;;NEWIODELAY  ;; 27/02/2015
  3208                              <1> 	; 27/02/2015
  3209                              <1> 	;pushf				; SAVE FLAGS
  3210                              <1> 	; 09/08/2022
  3211                              <1> 	; cf = 0, zf = 1
  3212                              <1> 	;mov	ecx, 3			; 30 TO 45 MICROSECONDS WAIT FOR
  3213                              <1> 	; 11/04/2021
  3214                              <1> 	;mov	ecx, 2 
  3215                              <1> 	; 06/08/2022
  3216 00004CB9 29C9                <1> 	sub	ecx, ecx
  3217 00004CBB B102                <1> 	mov	cl, 2
  3218 00004CBD E8F5D6FFFF          <1> 	call 	WAITF			; NEC FLAGS UPDATE CYCLE
  3219                              <1> 	; 09/08/2022
  3220                              <1> 	; cf = 0, zf = 1
  3221                              <1> 	;popf				; RESTORE FLAGS FOR EXIT
  3222                              <1> 	;pop	bx			; RESTORE REG
  3223 00004CC2 C3                  <1> 	retn				; CY = 0 FROM TEST INSTRUCTION
  3224                              <1> 
  3225                              <1> ;-------------------------------------------------------------------------------
  3226                              <1> ; SEEK
  3227                              <1> ;	THIS ROUTINE WILL MOVE THE HEAD ON THE NAMED DRIVE TO THE NAMED
  3228                              <1> ;	TRACK. IF THE DRIVE HAS NOT BEEN ACCESSED SINCE THE DRIVE
  3229                              <1> ;	RESET COMMAND WAS ISSUED, THE DRIVE WILL BE RECALIBRATED.
  3230                              <1> ;
  3231                              <1> ; ON ENTRY:	DI = DRIVE #
  3232                              <1> ;		CH = TRACK #
  3233                              <1> ;
  3234                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION.
  3235                              <1> ;		AX,BX,CX DX DESTROYED
  3236                              <1> ;-------------------------------------------------------------------------------
  3237                              <1> SEEK:
  3238 00004CC3 89FB                <1> 	mov	ebx, edi		; BX = DRIVE #
  3239 00004CC5 B001                <1> 	mov	al, 1			; ESTABLISH MASK FOR RECALIBRATE TEST
  3240                              <1> 	; 06/08/2022
  3241                              <1> 	;xchg	cl, bl			; SET DRIVE VALUE INTO CL
  3242                              <1> 	;rol	al, cl			; SHIFT MASK BY THE DRIVE VALUE
  3243                              <1> 	;xchg	cl, bl			; RECOVER TRACK VALUE
  3244                              <1> 	; 06/08/2022
  3245 00004CC7 84C3                <1> 	test	bl, al ; test bl, 1
  3246 00004CC9 7402                <1> 	jz	short seek_0
  3247 00004CCB FEC0                <1> 	inc	al ; shl al, 1
  3248                              <1> seek_0:
  3249 00004CCD 8405[CD770100]      <1> 	test	al, [SEEK_STATUS]	; TEST FOR RECALIBRATE REQUIRED
  3250 00004CD3 7526                <1> 	jnz	short J28A		; JUMP IF RECALIBRATE NOT REQUIRED
  3251                              <1> 
  3252 00004CD5 0805[CD770100]      <1> 	or	[SEEK_STATUS], al	; TURN ON THE NO RECALIBRATE BIT IN FLAG
  3253 00004CDB E862000000          <1> 	call	RECAL			; RECALIBRATE DRIVE
  3254 00004CE0 730E                <1> 	jnc	short AFT_RECAL		; RECALIBRATE DONE
  3255                              <1> 
  3256                              <1> ;-----	ISSUE RECALIBRATE FOR 80 TRACK DISKETTES
  3257                              <1> 
  3258 00004CE2 C605[D0770100]00    <1> 	mov	byte [DSKETTE_STATUS], 0 ; CLEAR OUT INVALID STATUS
  3259 00004CE9 E854000000          <1> 	call	RECAL			; RECALIBRATE DRIVE
  3260 00004CEE 7251                <1> 	jc	short RB		; IF RECALIBRATE FAILS TWICE THEN ERROR
  3261                              <1> 
  3262                              <1> AFT_RECAL:
  3263 00004CF0 C687[DD770100]00    <1>         mov     byte [DSK_TRK+edi], 0	; SAVE NEW CYLINDER AS PRESENT POSITION
  3264 00004CF7 08ED                <1> 	or	ch, ch			; CHECK FOR SEEK TO TRACK 0
  3265 00004CF9 743F                <1> 	jz	short DO_WAIT		; HEAD SETTLE, CY = 0 IF JUMP
  3266                              <1> 
  3267                              <1> ;-----	DRIVE IS IN SYNCHRONIZATION WITH CONTROLLER, SEEK TO TRACK
  3268                              <1> 
  3269 00004CFB F687[DB770100]20    <1> J28A:	test	byte [DSK_STATE+edi], DBL_STEP ; CHECK FOR DOUBLE STEP REQUIRED
  3270 00004D02 7402                <1> 	jz	short _R7		; SINGLE STEP REQUIRED BYPASS DOUBLE
  3271 00004D04 D0E5                <1> 	shl	ch, 1			; DOUBLE NUMBER OF STEP TO TAKE
  3272                              <1> 
  3273 00004D06 3AAF[DD770100]      <1> _R7:	cmp	ch, [DSK_TRK+edi]	; SEE IF ALREADY AT THE DESIRED TRACK
  3274 00004D0C 7433                <1> 	je	short RB		; IF YES, DO NOT NEED TO SEEK
  3275                              <1> 
  3276 00004D0E BA[414D0000]        <1> 	mov	edx, NEC_ERR		; LOAD RETURN ADDRESS
  3277 00004D13 52                  <1> 	push	edx ; (*)		; ON STACK FOR NEC OUTPUT ERROR
  3278 00004D14 88AF[DD770100]      <1> 	mov	[DSK_TRK+edi], ch	; SAVE NEW CYLINDER AS PRESENT POSITION
  3279 00004D1A B40F                <1> 	mov	ah, 0Fh			; SEEK COMMAND TO NEC
  3280 00004D1C E86BFFFFFF          <1> 	call	NEC_OUTPUT
  3281 00004D21 89FB                <1> 	mov	ebx, edi		; BX = DRIVE #
  3282 00004D23 88DC                <1> 	mov	ah, bl			; OUTPUT DRIVE NUMBER
  3283 00004D25 E862FFFFFF          <1> 	call	NEC_OUTPUT
  3284 00004D2A 8AA7[DD770100]      <1> 	mov	ah, [DSK_TRK+edi]	; GET CYLINDER NUMBER
  3285 00004D30 E857FFFFFF          <1> 	call	NEC_OUTPUT
  3286 00004D35 E827000000          <1> 	call	CHK_STAT_2		; ENDING INTERRUPT AND SENSE STATUS
  3287                              <1> 
  3288                              <1> ;-----	WAIT FOR HEAD SETTLE
  3289                              <1> 
  3290                              <1> DO_WAIT:
  3291 00004D3A 9C                  <1> 	pushf				; SAVE STATUS
  3292 00004D3B E81AFFFFFF          <1> 	call	HD_WAIT			; WAIT FOR HEAD SETTLE TIME
  3293 00004D40 9D                  <1> 	popf				; RESTORE STATUS
  3294                              <1> RB:
  3295                              <1> NEC_ERR:
  3296                              <1> 	; 08/02/2015 (code trick here from original IBM PC/AT DISKETTE.ASM)
  3297                              <1> 	; (*) nec_err -> retn (push edx -> pop edx) -> nec_err -> retn
  3298 00004D41 C3                  <1> 	retn				; RETURN TO CALLER
  3299                              <1> 
  3300                              <1> ;-------------------------------------------------------------------------------
  3301                              <1> ; RECAL
  3302                              <1> ;	RECALIBRATE DRIVE
  3303                              <1> ;
  3304                              <1> ; ON ENTRY:	DI = DRIVE #
  3305                              <1> ;
  3306                              <1> ; ON EXIT:	CY REFLECTS STATUS OF OPERATION.
  3307                              <1> ;-------------------------------------------------------------------------------
  3308                              <1> RECAL:
  3309                              <1> 	;push	cx
  3310                              <1> 	; 11/04/2021
  3311 00004D42 51                  <1> 	push	ecx
  3312 00004D43 B8[5F4D0000]        <1> 	mov	eax, RC_BACK		; LOAD NEC_OUTPUT ERROR
  3313 00004D48 50                  <1> 	push	eax
  3314 00004D49 B407                <1> 	mov	ah, 07h			; RECALIBRATE COMMAND
  3315 00004D4B E83CFFFFFF          <1> 	call	NEC_OUTPUT
  3316 00004D50 89FB                <1> 	mov	ebx, edi		; BX = DRIVE #
  3317 00004D52 88DC                <1> 	mov	ah, bl
  3318 00004D54 E833FFFFFF          <1> 	call	NEC_OUTPUT		; OUTPUT THE DRIVE NUMBER
  3319 00004D59 E803000000          <1> 	call	CHK_STAT_2		; GET THE INTERRUPT AND SENSE INT STATUS
  3320 00004D5E 58                  <1> 	pop	eax			; THROW AWAY ERROR
  3321                              <1> RC_BACK:
  3322                              <1> 	;pop	cx
  3323                              <1> 	; 11/04/2021
  3324 00004D5F 59                  <1> 	pop	ecx
  3325 00004D60 C3                  <1> 	retn
  3326                              <1> 
  3327                              <1> ;-------------------------------------------------------------------------------
  3328                              <1> ; CHK_STAT_2
  3329                              <1> ;	THIS ROUTINE HANDLES THE INTERRUPT RECEIVED AFTER RECALIBRATE,
  3330                              <1> ;	OR SEEK TO THE ADAPTER. THE INTERRUPT IS WAITED FOR, THE
  3331                              <1> ;	INTERRUPT STATUS SENSED, AND THE RESULT RETURNED TO THE CALLER.
  3332                              <1> ;
  3333                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION.
  3334                              <1> ;-------------------------------------------------------------------------------
  3335                              <1> CHK_STAT_2:
  3336 00004D61 B8[894D0000]        <1>         mov     eax, CS_BACK            ; LOAD NEC_OUTPUT ERROR ADDRESS
  3337 00004D66 50                  <1> 	push	eax
  3338 00004D67 E828000000          <1> 	call	WAIT_INT		; WAIT FOR THE INTERRUPT
  3339 00004D6C 721A                <1> 	jc	short J34		; IF ERROR, RETURN IT
  3340 00004D6E B408                <1> 	mov	ah, 08h			; SENSE INTERRUPT STATUS COMMAND
  3341 00004D70 E817FFFFFF          <1> 	call	NEC_OUTPUT
  3342 00004D75 E849000000          <1> 	call	RESULTS			; READ IN THE RESULTS
  3343 00004D7A 720C                <1> 	jc	short J34
  3344 00004D7C A0[D1770100]        <1> 	mov	al, [NEC_STATUS]	; GET THE FIRST STATUS BYTE
  3345 00004D81 2460                <1> 	and	al, 01100000B		; ISOLATE THE BITS
  3346 00004D83 3C60                <1> 	cmp	al, 01100000B		; TEST FOR CORRECT VALUE
  3347 00004D85 7403                <1> 	jz	short J35		; IF ERROR, GO MARK IT
  3348 00004D87 F8                  <1> 	clc				; GOOD RETURN
  3349                              <1> J34:
  3350 00004D88 58                  <1> 	pop	eax			; THROW AWAY ERROR RETURN
  3351                              <1> CS_BACK:
  3352 00004D89 C3                  <1> 	retn
  3353                              <1> J35:
  3354 00004D8A 800D[D0770100]40    <1> 	or	byte [DSKETTE_STATUS], BAD_SEEK
  3355 00004D91 F9                  <1> 	stc				; ERROR RETURN CODE
  3356 00004D92 EBF4                <1> 	jmp	short J34
  3357                              <1> 
  3358                              <1> ;-------------------------------------------------------------------------------
  3359                              <1> ; WAIT_INT
  3360                              <1> ;	THIS ROUTINE WAITS FOR AN INTERRUPT TO OCCUR A TIME OUT ROUTINE
  3361                              <1> ;	TAKES PLACE DURING THE WAIT, SO THAT AN ERROR MAY BE RETURNED
  3362                              <1> ;	IF THE DRIVE IS NOT READY.
  3363                              <1> ;
  3364                              <1> ; ON EXIT: 	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION.
  3365                              <1> ;-------------------------------------------------------------------------------
  3366                              <1> 
  3367                              <1> ; 17/12/2014
  3368                              <1> ; 2.5 seconds waiting !
  3369                              <1> ;(AWARD BIOS - 1999, WAIT_FDU_INT_LOW, WAIT_FDU_INT_HI)
  3370                              <1> ; amount of time to wait for completion interrupt from NEC.
  3371                              <1> 
  3372                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  3373                              <1> WAIT_INT:
  3374 00004D94 FB                  <1> 	sti				; TURN ON INTERRUPTS, JUST IN CASE
  3375                              <1> 	; 06/08/2022
  3376                              <1> 	;clc				; CLEAR TIMEOUT INDICATOR
  3377                              <1> 	;
  3378                              <1> 	;mov	bl, 10			; CLEAR THE COUNTERS
  3379                              <1> 	;xor	cx, cx			; FOR 2 SECOND WAIT
  3380                              <1> 
  3381                              <1> 	; Modification from AWARD BIOS - 1999 (ATORGS.ASM, WAIT
  3382                              <1> 	;
  3383                              <1> 	;WAIT_FOR_MEM:	
  3384                              <1> 	;	Waits for a bit at a specified memory location pointed
  3385                              <1> 	;	to by ES:[DI] to become set.
  3386                              <1> 	;INPUT:
  3387                              <1> 	;	AH= Mask to test with.
  3388                              <1> 	;	ES:[DI] = memory location to watch.
  3389                              <1> 	;	BH:CX= Number of memory refresh periods to delay.
  3390                              <1> 	;	     (normally 30 microseconds per period.)
  3391                              <1> 
  3392                              <1> 	; waiting for (max.) 2.5 secs in 30 micro units.
  3393                              <1> ;	mov 	cx, WAIT_FDU_INT_LO		; 017798
  3394                              <1> ;;	mov 	bl, WAIT_FDU_INT_HI
  3395                              <1> ;	mov 	bl, WAIT_FDU_INT_HI + 1
  3396                              <1> 	; 27/02/2015
  3397 00004D95 B986450100          <1> 	mov 	ecx, WAIT_FDU_INT_LH	; 83334 (2.5 seconds)		
  3398                              <1> WFMS_CHECK_MEM:
  3399 00004D9A F605[CD770100]80    <1> 	test	byte [SEEK_STATUS], INT_FLAG
  3400                              <1> 					; TEST FOR INTERRUPT OCCURRING
  3401 00004DA1 7516                <1>         jnz     short J37
  3402                              <1> WFMS_HI:
  3403 00004DA3 E461                <1> 	in	al, PORT_B  ; 061h	; SYS1, wait for lo to hi
  3404 00004DA5 A810                <1> 	test	al, 010h		; transition on memory
  3405 00004DA7 75FA                <1> 	jnz	short WFMS_HI		; refresh.
  3406                              <1> WFMS_LO:
  3407 00004DA9 E461                <1> 	in	al, PORT_B		; SYS1
  3408 00004DAB A810                <1> 	test	al, 010h
  3409 00004DAD 74FA                <1> 	jz	short WFMS_LO
  3410 00004DAF E2E9                <1>         loop	WFMS_CHECK_MEM
  3411                              <1> 
  3412                              <1> ;WFMS_OUTER_LP:
  3413                              <1> ;;	or	bl, bl			; check outer counter
  3414                              <1> ;;	jz	short J36A		; WFMS_TIMEOUT
  3415                              <1> ;	dec	bl
  3416                              <1> ;	jz	short J36A	
  3417                              <1> ;	jmp	short WFMS_CHECK_MEM
  3418                              <1> 
  3419                              <1> 	; 17/12/2014
  3420                              <1> 	; 16/12/2014
  3421                              <1> ;	mov	byte [wait_count], 0	; Reset (INT 08H) counter
  3422                              <1> ;J36:
  3423                              <1> ;	test	byte [SEEK_STATUS], INT_FLAG
  3424                              <1> ;					; TEST FOR INTERRUPT OCCURRING
  3425                              <1> ;	jnz	short J37
  3426                              <1> 
  3427                              <1> 	; 16/12/2014
  3428                              <1> 	;loop	J36			; COUNT DOWN WHILE WAITING
  3429                              <1> 	;dec	bl			; SECOND LEVEL COUNTER
  3430                              <1> 	;jnz	short J36
  3431                              <1> ;       cmp     byte [wait_count], 46   ; (46/18.2 seconds)
  3432                              <1> ;	jb	short J36
  3433                              <1> 
  3434                              <1> ;WFMS_TIMEOUT:
  3435                              <1> ;J36A:
  3436 00004DB1 800D[D0770100]80    <1> 	or	byte [DSKETTE_STATUS], TIME_OUT ; NOTHING HAPPENED
  3437 00004DB8 F9                  <1> 	stc				; ERROR RETURN
  3438                              <1> J37:
  3439 00004DB9 9C                  <1> 	pushf				; SAVE CURRENT CARRY
  3440 00004DBA 8025[CD770100]7F    <1> 	and	byte [SEEK_STATUS], ~INT_FLAG ; TURN OFF INTERRUPT FLAG
  3441 00004DC1 9D                  <1> 	popf				; RECOVER CARRY
  3442 00004DC2 C3                  <1> 	retn				; GOOD RETURN CODE
  3443                              <1> 
  3444                              <1> ;-------------------------------------------------------------------------------
  3445                              <1> ; RESULTS
  3446                              <1> ;	THIS ROUTINE WILL READ ANYTHING THAT THE NEC CONTROLLER RETURNS 
  3447                              <1> ;	FOLLOWING AN INTERRUPT.
  3448                              <1> ;
  3449                              <1> ; ON EXIT:	@DSKETTE_STATUS, CY REFLECT STATUS OF OPERATION.
  3450                              <1> ;		AX,BX,CX,DX DESTROYED
  3451                              <1> ;-------------------------------------------------------------------------------
  3452                              <1> RESULTS:
  3453                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  3454 00004DC3 57                  <1> 	push	edi
  3455 00004DC4 BF[D1770100]        <1> 	mov	edi, NEC_STATUS		; POINTER TO DATA AREA
  3456 00004DC9 B307                <1> 	mov	bl, 7			; MAX STATUS BYTES
  3457 00004DCB 66BAF403            <1> 	mov	dx, 03F4h		; STATUS PORT
  3458                              <1> 
  3459                              <1> ;-----	WAIT FOR REQUEST FOR MASTER
  3460                              <1> 
  3461                              <1> _R10: 
  3462                              <1> 	; 16/12/2014
  3463                              <1> 	; wait for (max) 0.5 seconds
  3464                              <1> 	;mov	bh, 2			; HIGH ORDER COUNTER
  3465                              <1> 	;xor	cx, cx			; COUNTER
  3466                              <1> 
  3467                              <1> 	;Time to wait while waiting for each byte of NEC results = .5
  3468                              <1> 	;seconds.  .5 seconds = 500,000 micros.  500,000/30 = 16,667.
  3469                              <1> 	; 27/02/2015
  3470 00004DCF B91B410000          <1> 	mov 	ecx, WAIT_FDU_RESULTS_LH ; 16667  
  3471                              <1> 	;mov	cx, WAIT_FDU_RESULTS_LO  ; 16667
  3472                              <1> 	;mov	bh, WAIT_FDU_RESULTS_HI+1 ; 0+1
  3473                              <1> 
  3474                              <1> WFPSR_OUTER_LP:
  3475                              <1> 	;
  3476                              <1> WFPSR_CHECK_PORT:
  3477                              <1> J39:					; WAIT FOR MASTER
  3478 00004DD4 EC                  <1> 	in	al, dx			; GET STATUS
  3479 00004DD5 24C0                <1> 	and	al, 11000000b		; KEEP ONLY STATUS AND DIRECTION
  3480 00004DD7 3CC0                <1> 	cmp	al, 11000000b		; STATUS 1 AND DIRECTION 1 ?
  3481 00004DD9 7418                <1> 	jz	short J42		; STATUS AND DIRECTION OK
  3482                              <1> WFPSR_HI:
  3483 00004DDB E461                <1> 	in	al, PORT_B	; 061h	; SYS1	; wait for hi to lo
  3484 00004DDD A810                <1> 	test	al, 010h		; transition on memory
  3485 00004DDF 75FA                <1> 	jnz	short WFPSR_HI		; refresh.
  3486                              <1> WFPSR_LO:
  3487 00004DE1 E461                <1> 	in	al, PORT_B		; SYS1
  3488 00004DE3 A810                <1> 	test	al, 010h
  3489 00004DE5 74FA                <1> 	jz	SHORT WFPSR_LO
  3490 00004DE7 E2EB                <1> 	loop	WFPSR_CHECK_PORT
  3491                              <1> 
  3492                              <1> 	;; 27/02/2015
  3493                              <1> 	;;dec	bh
  3494                              <1> 	;;jnz	short WFPSR_OUTER_LP
  3495                              <1> 	;jmp	short WFPSR_TIMEOUT	; fail
  3496                              <1> 
  3497                              <1> 	;;mov	byte [wait_count], 0
  3498                              <1> ;J39:					; WAIT FOR MASTER
  3499                              <1> ;	in	al, dx			; GET STATUS
  3500                              <1> ;	and	al, 11000000b		; KEEP ONLY STATUS AND DIRECTION
  3501                              <1> ;	cmp	al, 11000000b		; STATUS 1 AND DIRECTION 1 ?
  3502                              <1> ;	jz	short J42		; STATUS AND DIRECTION OK
  3503                              <1> 	;loop	J39			; LOOP TILL TIMEOUT
  3504                              <1> 	;dec	bh			; DECREMENT HIGH ORDER COUNTER
  3505                              <1> 	;jnz	short J39		; REPEAT TILL DELAY DONE
  3506                              <1> 	;
  3507                              <1> 	;;cmp	byte [wait_count], 10  ; (10/18.2 seconds)
  3508                              <1> 	;;jb	short J39	
  3509                              <1> 
  3510                              <1> ;WFPSR_TIMEOUT:
  3511 00004DE9 800D[D0770100]80    <1> 	or	byte [DSKETTE_STATUS], TIME_OUT
  3512 00004DF0 F9                  <1> 	stc				; SET ERROR RETURN
  3513 00004DF1 EB28                <1> 	jmp	short POPRES		; POP REGISTERS AND RETURN
  3514                              <1> 
  3515                              <1> ;-----	READ IN THE STATUS
  3516                              <1> 
  3517                              <1> J42:
  3518 00004DF3 EB00                <1> 	jmp	$+2			; I/O DELAY
  3519                              <1> 	;inc	dx			; POINT AT DATA PORT
  3520                              <1> 	; 06/08/2022
  3521 00004DF5 FEC2                <1> 	inc	dl
  3522 00004DF7 EC                  <1> 	in	al, dx			; GET THE DATA
  3523                              <1> 	; 16/12/2014
  3524                              <1> 	NEWIODELAY
    83 00004DF8 E6EB                <2>  out 0EBh, al
  3525 00004DFA 8807                <1>         mov     [edi], al		; STORE THE BYTE
  3526 00004DFC 47                  <1> 	inc	edi			; INCREMENT THE POINTER
  3527                              <1> 
  3528                              <1> 	; 16/12/2014
  3529                              <1> ;	push	cx
  3530                              <1> ;	mov	cx, 30
  3531                              <1> ;wdw2:
  3532                              <1> ;	NEWIODELAY
  3533                              <1> ;	loop	wdw2
  3534                              <1> ;	pop	cx
  3535                              <1> 
  3536                              <1> 	;;mov	ecx, 3			; MINIMUM 24 MICROSECONDS FOR NEC
  3537                              <1> 	; 11/04/2021
  3538                              <1> 	;mov	ecx, 2
  3539                              <1> 	; 06/08/2022
  3540 00004DFD 29C9                <1> 	sub	ecx, ecx
  3541 00004DFF B102                <1> 	mov	cl, 2
  3542 00004E01 E8B1D5FFFF          <1> 	call	WAITF			; WAIT 30 TO 45 MICROSECONDS
  3543                              <1> 	;dec	dx			; POINT AT STATUS PORT
  3544                              <1> 	; 06/08/2022
  3545 00004E06 FECA                <1> 	dec	dl
  3546 00004E08 EC                  <1> 	in	al, dx			; GET STATUS
  3547                              <1> 	; 16/12/2014
  3548                              <1> 	NEWIODELAY
    83 00004E09 E6EB                <2>  out 0EBh, al
  3549                              <1> 	;
  3550 00004E0B A810                <1> 	test	al, 00010000b		; TEST FOR NEC STILL BUSY
  3551 00004E0D 740C                <1> 	jz	short POPRES		; RESULTS DONE ?
  3552                              <1> 
  3553 00004E0F FECB                <1> 	dec	bl			; DECREMENT THE STATUS COUNTER
  3554 00004E11 75BC                <1>         jnz     short _R10              ; GO BACK FOR MORE
  3555 00004E13 800D[D0770100]20    <1> 	or	byte [DSKETTE_STATUS], BAD_NEC ; TOO MANY STATUS BYTES
  3556 00004E1A F9                  <1> 	stc				; SET ERROR FLAG
  3557                              <1> 
  3558                              <1> ;-----	RESULT OPERATION IS DONE
  3559                              <1> POPRES:
  3560 00004E1B 5F                  <1> 	pop	edi
  3561 00004E1C C3                  <1> 	retn				; RETURN WITH CARRY SET
  3562                              <1> 
  3563                              <1> ;-------------------------------------------------------------------------------
  3564                              <1> ; READ_DSKCHNG
  3565                              <1> ;	READS THE STATE OF THE DISK CHANGE LINE.
  3566                              <1> ;
  3567                              <1> ; ON ENTRY:	DI = DRIVE #
  3568                              <1> ;
  3569                              <1> ; ON EXIT:	DI = DRIVE #
  3570                              <1> ;		ZF = 0 : DISK CHANGE LINE INACTIVE
  3571                              <1> ;		ZF = 1 : DISK CHANGE LINE ACTIVE
  3572                              <1> ;		AX,CX,DX DESTROYED
  3573                              <1> ;-------------------------------------------------------------------------------
  3574                              <1> READ_DSKCHNG:
  3575 00004E1D E8AFFDFFFF          <1> 	call	MOTOR_ON		; TURN ON THE MOTOR IF OFF
  3576 00004E22 66BAF703            <1> 	mov	dx, 03F7h		; ADDRESS DIGITAL INPUT REGISTER
  3577 00004E26 EC                  <1> 	in	al, dx			; INPUT DIGITAL INPUT REGISTER
  3578 00004E27 A880                <1> 	test	al, DSK_CHG		; CHECK FOR DISK CHANGE LINE ACTIVE
  3579 00004E29 C3                  <1> 	retn				; RETURN TO CALLER WITH ZERO FLAG SET
  3580                              <1> 
  3581                              <1> fdc_int:  
  3582                              <1> 	  ; 30/07/2015	
  3583                              <1> 	  ; 16/02/2015
  3584                              <1> ;int_0Eh: ; 11/12/2014
  3585                              <1> 
  3586                              <1> ;--- HARDWARE INT 0EH -- ( IRQ LEVEL 6 ) ---------------------------------------
  3587                              <1> ; DISK_INT
  3588                              <1> ;	THIS ROUTINE HANDLES THE DISKETTE INTERRUPT.
  3589                              <1> ;
  3590                              <1> ; ON EXIT:	THE INTERRUPT FLAG IS SET IN @SEEK_STATUS.
  3591                              <1> ;-------------------------------------------------------------------------------
  3592                              <1> DISK_INT_1:
  3593                              <1> 	;push	AX			; SAVE WORK REGISTER
  3594                              <1> 	; 11/04/2021
  3595 00004E2A 50                  <1> 	push	eax
  3596 00004E2B 1E                  <1> 	push	ds
  3597 00004E2C 66B81000            <1> 	mov	ax, KDATA
  3598 00004E30 8ED8                <1> 	mov 	ds, ax
  3599 00004E32 800D[CD770100]80    <1>         or	byte [SEEK_STATUS], INT_FLAG ; TURN ON INTERRUPT OCCURRED
  3600 00004E39 B020                <1> 	mov     al, EOI			; END OF INTERRUPT MARKER
  3601 00004E3B E620                <1> 	out	INTA00, al		; INTERRUPT CONTROL PORT
  3602 00004E3D 1F                  <1> 	pop	ds
  3603                              <1> 	;pop	ax			; RECOVER REGISTER
  3604                              <1> 	; 11/04/2021
  3605 00004E3E 58                  <1> 	pop	eax
  3606 00004E3F CF                  <1> 	iretd				; RETURN FROM INTERRUPT
  3607                              <1> 
  3608                              <1> ;-------------------------------------------------------------------------------
  3609                              <1> ; DSKETTE_SETUP
  3610                              <1> ;	THIS ROUTINE DOES A PRELIMINARY CHECK TO SEE WHAT TYPE OF
  3611                              <1> ;	DISKETTE DRIVES ARE ATTACH TO THE SYSTEM.
  3612                              <1> ;-------------------------------------------------------------------------------
  3613                              <1> 
  3614                              <1> ; 09/08/2022 - TRDOS 386 Kernel v2.0.5
  3615                              <1> ; 29/05/2016 - TRDOS 386 (TRDOS v2.0)
  3616                              <1> 
  3617                              <1> DSKETTE_SETUP:
  3618                              <1> 	;push	ax			; SAVE REGISTERS
  3619                              <1> 	;push	bx
  3620                              <1> 	;push	cx
  3621 00004E40 52                  <1> 	push	edx
  3622                              <1> 	;push	di
  3623                              <1> 	;;push	ds
  3624                              <1> 	; 14/12/2014
  3625                              <1> 	;mov	word [DISK_POINTER], MD_TBL6
  3626                              <1> 	;mov	[DISK_POINTER+2], cs
  3627                              <1> 	;
  3628                              <1> 	;or	byte [RTC_WAIT_FLAG], 1	; NO RTC WAIT, FORCE USE OF LOOP
  3629 00004E41 31FF                <1> 	xor	edi, edi		; INITIALIZE DRIVE POINTER
  3630                              <1> 	; 09/08/2022
  3631                              <1> 	;mov	esi, eax
  3632 00004E43 31C0                <1> 	xor	eax, eax ; eax = 0
  3633 00004E45 66A3[DB770100]      <1> 	mov	[DSK_STATE], ax		; INITIALIZE STATES
  3634 00004E4B 8025[D8770100]33    <1> 	and	byte [LASTRATE], ~(STRT_MSK+SEND_MSK) ; CLEAR START & SEND
  3635 00004E52 800D[D8770100]C0    <1> 	or	byte [LASTRATE], SEND_MSK ; INITIALIZE SENT TO IMPOSSIBLE
  3636 00004E59 A2[CD770100]        <1> 	mov	[SEEK_STATUS], al	; INDICATE RECALIBRATE NEEDED
  3637 00004E5E A2[CF770100]        <1> 	mov	[MOTOR_COUNT], al	; INITIALIZE MOTOR COUNT
  3638 00004E63 A2[CE770100]        <1> 	mov	[MOTOR_STATUS], al	; INITIALIZE DRIVES TO OFF STATE
  3639 00004E68 A2[D0770100]        <1> 	mov	[DSKETTE_STATUS], al	; NO ERRORS
  3640                              <1> 	;
  3641                              <1> 	; 28/02/2015
  3642                              <1> 	;mov	word [cfd], 100h 
  3643 00004E6D E821F4FFFF          <1> 	call	DSK_RESET
  3644 00004E72 5A                  <1> 	pop	edx
  3645 00004E73 F8                  <1> 	clc	; 29/05/2016
  3646 00004E74 C3                  <1> 	retn
  3647                              <1> 
  3648                              <1> ;SUP0:
  3649                              <1> ;	call	DRIVE_DET		; DETERMINE DRIVE
  3650                              <1> ;	call	XLAT_OLD		; TRANSLATE STATE TO COMPATIBLE MODE
  3651                              <1> ;	; 02/01/2015
  3652                              <1> ;	;inc	di			; POINT TO NEXT DRIVE
  3653                              <1> ;	;cmp	di, MAX_DRV		; SEE IF DONE
  3654                              <1> ;	;jnz	short SUP0		; REPEAT FOR EACH ORIVE
  3655                              <1> ;       cmp     byte [fd1_type], 0	
  3656                              <1> ;	jna	short sup1
  3657                              <1> ;	or	di, di
  3658                              <1> ;	jnz	short sup1
  3659                              <1> ;	inc	di
  3660                              <1> ;       jmp     short SUP0
  3661                              <1> ;sup1:
  3662                              <1> ;	mov	byte [SEEK_STATUS], 0	; FORCE RECALIBRATE
  3663                              <1> ;	;and	byte [RTC_WAIT_FLAG], 0FEh ; ALLOW FOR RTC WAIT
  3664                              <1> ;	call	SETUP_END		; VARIOUS CLEANUPS
  3665                              <1> ;	;;pop	ds			; RESTORE CALLERS REGISTERS
  3666                              <1> ;	;pop	di
  3667                              <1> ;	pop	edx
  3668                              <1> ;	;pop	cx
  3669                              <1> ;	;pop	bx
  3670                              <1> ;	;pop	ax
  3671                              <1> ;	retn
  3672                              <1> 
  3673                              <1> ;//////////////////////////////////////////////////////
  3674                              <1> ;; END OF DISKETTE I/O ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  3675                              <1> 
  3676                              <1> ; 17/04/2021 (TRDOS 386 v2.0.4) 
  3677                              <1> 
  3678                              <1> ; 11/04/2021
  3679                              <1> ;int13h: ; 21/02/2015
  3680                              <1> 	;pushfd
  3681                              <1> 	;push 	cs
  3682                              <1> 	;;call 	DISK_IO
  3683                              <1> 	;;retn
  3684                              <1> 
  3685                              <1> ;;;;;; DISK I/O ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; 21/02/2015 ;;;
  3686                              <1> ;/////////////////////////////////////////////////////////////////////
  3687                              <1> 
  3688                              <1> ; DISK I/O - Erdogan Tan (Retro UNIX 386 v1 project)
  3689                              <1> ; 18/02/2016
  3690                              <1> ; 17/02/2016
  3691                              <1> ; 23/02/2015
  3692                              <1> ; 21/02/2015 (unix386.s)
  3693                              <1> ; 22/12/2014 - 14/02/2015 (dsectrm2.s)
  3694                              <1> ;
  3695                              <1> ; Original Source Code:
  3696                              <1> ; DISK ----- 09/25/85 FIXED DISK BIOS
  3697                              <1> ; (IBM PC XT Model 286 System BIOS Source Code, 04-21-86)
  3698                              <1> ;
  3699                              <1> ; Modifications: by reference of AWARD BIOS 1999 (D1A0622) 
  3700                              <1> ;		 Source Code - ATORGS.ASM, AHDSK.ASM
  3701                              <1> ;
  3702                              <1> 
  3703                              <1> ;The wait for controller to be not busy is 10 seconds.
  3704                              <1> ;10,000,000 / 30 = 333,333. 333,333 decimal = 051615h
  3705                              <1> ;;WAIT_HDU_CTLR_BUSY_LO	equ 1615h		
  3706                              <1> ;;WAIT_HDU_CTLR_BUSY_HI	equ 05h
  3707                              <1> WAIT_HDU_CTRL_BUSY_LH	equ 51615h	; 21/02/2015		
  3708                              <1> 
  3709                              <1> ;The wait for controller to issue completion interrupt is 10 seconds.
  3710                              <1> ;10,000,000 / 30 = 333,333.  333,333 decimal = 051615h
  3711                              <1> ;;WAIT_HDU_INT_LO	equ 1615h
  3712                              <1> ;;WAIT_HDU_INT_HI	equ 05h
  3713                              <1> WAIT_HDU_INT_LH		equ 51615h	; 21/02/2015
  3714                              <1> 
  3715                              <1> ;The wait for Data request on read and write longs is
  3716                              <1> ;2000 us. (?)
  3717                              <1> ;;WAIT_HDU_DRQ_LO	equ 1000	; 03E8h
  3718                              <1> ;;WAIT_HDU_DRQ_HI	equ 0
  3719                              <1> WAIT_HDU_DRQ_LH		equ 1000	; 21/02/2015
  3720                              <1> 
  3721                              <1> ; Port 61h (PORT_B)
  3722                              <1> SYS1	equ 61h		; PORT_B  (diskette.inc)
  3723                              <1> 
  3724                              <1> ; 23/12/2014
  3725                              <1> %define CMD_BLOCK       ebp-8  ; 21/02/2015
  3726                              <1> 
  3727                              <1> ;--- INT 13H -------------------------------------------------------------------
  3728                              <1> ;									       :
  3729                              <1> ; FIXED DISK I/O INTERFACE						       :
  3730                              <1> ;									       :
  3731                              <1> ;	THIS INTERFACE PROVIDES ACCESS TO 5 1/4" FIXED DISKS THROUGH           :
  3732                              <1> ;	THE IBM FIXED DISK CONTROLLER.					       :
  3733                              <1> ;									       :
  3734                              <1> ;	THE  BIOS  ROUTINES  ARE  MEANT  TO  BE  ACCESSED  THROUGH	       :
  3735                              <1> ;	SOFTWARE  INTERRUPTS  ONLY.    ANY  ADDRESSES  PRESENT	IN	       :
  3736                              <1> ;	THESE  LISTINGS  ARE  INCLUDED	 ONLY	FOR  COMPLETENESS,	       :
  3737                              <1> ;	NOT  FOR  REFERENCE.  APPLICATIONS   WHICH  REFERENCE  ANY	       :
  3738                              <1> ;	ABSOLUTE  ADDRESSES  WITHIN  THE  CODE	SEGMENTS  OF  BIOS	       :
  3739                              <1> ;	VIOLATE  THE  STRUCTURE  AND  DESIGN  OF  BIOS. 		       :
  3740                              <1> ;									       :
  3741                              <1> ;------------------------------------------------------------------------------:
  3742                              <1> ;									       :
  3743                              <1> ; INPUT  (AH)= HEX COMMAND VALUE					       :
  3744                              <1> ;									       :
  3745                              <1> ;	(AH)= 00H  RESET DISK (DL = 80H,81H) / DISKETTE 		       :
  3746                              <1> ;	(AH)= 01H  READ THE STATUS OF THE LAST DISK OPERATION INTO (AL)        :
  3747                              <1> ;		    NOTE: DL < 80H - DISKETTE				       :
  3748                              <1> ;			  DL > 80H - DISK				       :
  3749                              <1> ;	(AH)= 02H  READ THE DESIRED SECTORS INTO MEMORY 		       :
  3750                              <1> ;	(AH)= 03H  WRITE THE DESIRED SECTORS FROM MEMORY		       :
  3751                              <1> ;	(AH)= 04H  VERIFY THE DESIRED SECTORS				       :
  3752                              <1> ;	(AH)= 05H  FORMAT THE DESIRED TRACK				       :
  3753                              <1> ;	(AH)= 06H  UNUSED						       :
  3754                              <1> ;	(AH)= 07H  UNUSED						       :
  3755                              <1> ;	(AH)= 08H  RETURN THE CURRENT DRIVE PARAMETERS			       :
  3756                              <1> ;	(AH)= 09H  INITIALIZE DRIVE PAIR CHARACTERISTICS		       :
  3757                              <1> ;		    INTERRUPT 41 POINTS TO DATA BLOCK FOR DRIVE 0	       :
  3758                              <1> ;		    INTERRUPT 46 POINTS TO DATA BLOCK FOR DRIVE 1	       :
  3759                              <1> ;	(AH)= 0AH  READ LONG						       :
  3760                              <1> ;	(AH)= 0BH  WRITE LONG  (READ & WRITE LONG ENCOMPASS 512 + 4 BYTES ECC) :
  3761                              <1> ;	(AH)= 0CH  SEEK 						       :
  3762                              <1> ;	(AH)= 0DH  ALTERNATE DISK RESET (SEE DL)			       :
  3763                              <1> ;	(AH)= 0EH  UNUSED						       :
  3764                              <1> ;	(AH)= 0FH  UNUSED						       :
  3765                              <1> ;	(AH)= 10H  TEST DRIVE READY					       :
  3766                              <1> ;	(AH)= 11H  RECALIBRATE						       :
  3767                              <1> ;	(AH)= 12H  UNUSED						       :
  3768                              <1> ;	(AH)= 13H  UNUSED						       :
  3769                              <1> ;	(AH)= 14H  CONTROLLER INTERNAL DIAGNOSTIC			       :
  3770                              <1> ;	(AH)= 15H  READ DASD TYPE					       :
  3771                              <1> ;									       :
  3772                              <1> ;-------------------------------------------------------------------------------
  3773                              <1> ;									       :
  3774                              <1> ;	REGISTERS USED FOR FIXED DISK OPERATIONS			       :
  3775                              <1> ;									       :
  3776                              <1> ;		(DL)	-  DRIVE NUMBER     (80H-81H FOR DISK. VALUE CHECKED)  :
  3777                              <1> ;		(DH)	-  HEAD NUMBER	    (0-15 ALLOWED, NOT VALUE CHECKED)  :
  3778                              <1> ;		(CH)	-  CYLINDER NUMBER  (0-1023, NOT VALUE CHECKED)(SEE CL):
  3779                              <1> ;		(CL)	-  SECTOR NUMBER    (1-17, NOT VALUE CHECKED)	       :
  3780                              <1> ;									       :
  3781                              <1> ;			   NOTE: HIGH 2 BITS OF CYLINDER NUMBER ARE PLACED     :
  3782                              <1> ;				 IN THE HIGH 2 BITS OF THE CL REGISTER	       :
  3783                              <1> ;				 (10 BITS TOTAL)			       :
  3784                              <1> ;									       :
  3785                              <1> ;		(AL)	-  NUMBER OF SECTORS (MAXIMUM POSSIBLE RANGE 1-80H,    :
  3786                              <1> ;					      FOR READ/WRITE LONG 1-79H)       :
  3787                              <1> ;									       :
  3788                              <1> ;		(ES:BX) -  ADDRESS OF BUFFER FOR READS AND WRITES,	       :
  3789                              <1> ;			   (NOT REQUIRED FOR VERIFY)			       :
  3790                              <1> ;									       :
  3791                              <1> ;		FORMAT (AH=5) ES:BX POINTS TO A 512 BYTE BUFFER. THE FIRST     :
  3792                              <1> ;			   2*(SECTORS/TRACK) BYTES CONTAIN F,N FOR EACH SECTOR.:
  3793                              <1> ;			   F = 00H FOR A GOOD SECTOR			       :
  3794                              <1> ;			       80H FOR A BAD SECTOR			       :
  3795                              <1> ;			   N = SECTOR NUMBER				       :
  3796                              <1> ;			   FOR AN INTERLEAVE OF 2 AND 17 SECTORS/TRACK	       :
  3797                              <1> ;			   THE TABLE SHOULD BE: 			       :
  3798                              <1> ;									       :
  3799                              <1> ;		   DB	   00H,01H,00H,0AH,00H,02H,00H,0BH,00H,03H,00H,0CH     :
  3800                              <1> ;		   DB	   00H,04H,00H,0DH,00H,05H,00H,0EH,00H,06H,00H,0FH     :
  3801                              <1> ;		   DB	   00H,07H,00H,10H,00H,08H,00H,11H,00H,09H	       :
  3802                              <1> ;									       :
  3803                              <1> ;-------------------------------------------------------------------------------
  3804                              <1> 
  3805                              <1> ;-------------------------------------------------------------------------------
  3806                              <1> ; OUTPUT								       :
  3807                              <1> ;	AH = STATUS OF CURRENT OPERATION				       :
  3808                              <1> ;	     STATUS BITS ARE DEFINED IN THE EQUATES BELOW		       :
  3809                              <1> ;	CY = 0	SUCCESSFUL OPERATION (AH=0 ON RETURN)			       :
  3810                              <1> ;	CY = 1	FAILED OPERATION (AH HAS ERROR REASON)			       :
  3811                              <1> ;									       :
  3812                              <1> ;	NOTE:	ERROR 11H  INDICATES THAT THE DATA READ HAD A RECOVERABLE      :
  3813                              <1> ;		ERROR WHICH WAS CORRECTED BY THE ECC ALGORITHM.  THE DATA      :
  3814                              <1> ;		IS PROBABLY GOOD,   HOWEVER THE BIOS ROUTINE INDICATES AN      :
  3815                              <1> ;		ERROR TO ALLOW THE CONTROLLING PROGRAM A CHANCE TO DECIDE      :
  3816                              <1> ;		FOR ITSELF.  THE  ERROR  MAY  NOT  RECUR  IF  THE DATA IS      :
  3817                              <1> ;		REWRITTEN.						       :
  3818                              <1> ;									       :
  3819                              <1> ;	IF DRIVE PARAMETERS WERE REQUESTED (DL >= 80H), 		       :
  3820                              <1> ;	   INPUT:							       :
  3821                              <1> ;	     (DL) = DRIVE NUMBER					       :	
  3822                              <1> ;	     ; 27/05/2016 - TRDOS 386 (TRDOS v2.0)						       :	 	
  3823                              <1> ;	     EBX = Buffer address for fixed disk parameters table (32 bytes)   :
  3824                              <1> ;	   OUTPUT:							       :
  3825                              <1> ;	     (DL) = NUMBER OF CONSECUTIVE ACKNOWLEDGING DRIVES ATTACHED (1-2)  :
  3826                              <1> ;		    (CONTROLLER CARD ZERO TALLY ONLY)			       :
  3827                              <1> ;	     (DH) = MAXIMUM USEABLE VALUE FOR HEAD NUMBER		       :
  3828                              <1> ;	     (CH) = MAXIMUM USEABLE VALUE FOR CYLINDER NUMBER		       :
  3829                              <1> ;	     (CL) = MAXIMUM USEABLE VALUE FOR SECTOR NUMBER		       :
  3830                              <1> ;		    AND CYLINDER NUMBER HIGH BITS			       :
  3831                              <1> ;									       :
  3832                              <1> ;	IF READ DASD TYPE WAS REQUESTED,				       :
  3833                              <1> ;									       :
  3834                              <1> ;	AH = 0 - NOT PRESENT						       :
  3835                              <1> ;	     1 - DISKETTE - NO CHANGE LINE AVAILABLE			       :
  3836                              <1> ;	     2 - DISKETTE - CHANGE LINE AVAILABLE			       :
  3837                              <1> ;	     3 - FIXED DISK						       :
  3838                              <1> ;									       :
  3839                              <1> ;	CX,DX = NUMBER OF 512 BYTE BLOCKS WHEN AH = 3			       :
  3840                              <1> ;									       :
  3841                              <1> ;	REGISTERS WILL BE PRESERVED EXCEPT WHEN THEY ARE USED TO RETURN        :
  3842                              <1> ;	INFORMATION.							       :
  3843                              <1> ;									       :
  3844                              <1> ;	NOTE: IF AN ERROR IS REPORTED BY THE DISK CODE, THE APPROPRIATE        :
  3845                              <1> ;		ACTION IS TO RESET THE DISK, THEN RETRY THE OPERATION.	       :
  3846                              <1> ;									       :
  3847                              <1> ;-------------------------------------------------------------------------------
  3848                              <1> 
  3849                              <1> SENSE_FAIL	EQU	0FFH		; NOT IMPLEMENTED
  3850                              <1> NO_ERR		EQU	0E0H		; STATUS ERROR/ERROR REGISTER=0
  3851                              <1> WRITE_FAULT	EQU	0CCH		; WRITE FAULT ON SELECTED DRIVE
  3852                              <1> UNDEF_ERR	EQU	0BBH		; UNDEFINED ERROR OCCURRED
  3853                              <1> NOT_RDY 	EQU	0AAH		; DRIVE NOT READY
  3854                              <1> TIME_OUT	EQU	80H		; ATTACHMENT FAILED TO RESPOND
  3855                              <1> BAD_SEEK	EQU	40H		; SEEK OPERATION FAILED
  3856                              <1> BAD_CNTLR	EQU	20H		; CONTROLLER HAS FAILED
  3857                              <1> DATA_CORRECTED	EQU	11H		; ECC CORRECTED DATA ERROR
  3858                              <1> BAD_ECC 	EQU	10H		; BAD ECC ON DISK READ
  3859                              <1> BAD_TRACK	EQU	0BH		; NOT IMPLEMENTED
  3860                              <1> BAD_SECTOR	EQU	0AH		; BAD SECTOR FLAG DETECTED
  3861                              <1> ;DMA_BOUNDARY	EQU	09H		; DATA EXTENDS TOO FAR
  3862                              <1> INIT_FAIL	EQU	07H		; DRIVE PARAMETER ACTIVITY FAILED
  3863                              <1> BAD_RESET	EQU	05H		; RESET FAILED
  3864                              <1> ;RECORD_NOT_FND	EQU	04H		; REQUESTED SECTOR NOT FOUND
  3865                              <1> ;BAD_ADDR_MARK	EQU	02H		; ADDRESS MARK NOT FOUND
  3866                              <1> ;BAD_CMD 	EQU	01H		; BAD COMMAND PASSED TO DISK I/O
  3867                              <1> 
  3868                              <1> ;--------------------------------------------------------
  3869                              <1> ;							:
  3870                              <1> ; FIXED DISK PARAMETER TABLE				:
  3871                              <1> ;  -  THE TABLE IS COMPOSED OF A BLOCK DEFINED AS:	:
  3872                              <1> ;							:
  3873                              <1> ;  +0	(1 WORD) - MAXIMUM NUMBER OF CYLINDERS		:
  3874                              <1> ;  +2	(1 BYTE) - MAXIMUM NUMBER OF HEADS		:
  3875                              <1> ;  +3	(1 WORD) - NOT USED/SEE PC-XT			:
  3876                              <1> ;  +5	(1 WORD) - STARTING WRITE PRECOMPENSATION CYL	:
  3877                              <1> ;  +7	(1 BYTE) - MAXIMUM ECC DATA BURST LENGTH	:
  3878                              <1> ;  +8	(1 BYTE) - CONTROL BYTE 			:
  3879                              <1> ;		   BIT	  7 DISABLE RETRIES -OR-	:
  3880                              <1> ;		   BIT	  6 DISABLE RETRIES		:
  3881                              <1> ;		   BIT	  3 MORE THAN 8 HEADS		:
  3882                              <1> ;  +9	(3 BYTES)- NOT USED/SEE PC-XT			:
  3883                              <1> ; +12	(1 WORD) - LANDING ZONE 			:
  3884                              <1> ; +14	(1 BYTE) - NUMBER OF SECTORS/TRACK		:
  3885                              <1> ; +15	(1 BYTE) - RESERVED FOR FUTURE USE		:
  3886                              <1> ;							:
  3887                              <1> ;	 - TO DYNAMICALLY DEFINE A SET OF PARAMETERS	:
  3888                              <1> ;	   BUILD A TABLE FOR UP TO 15 TYPES AND PLACE	:
  3889                              <1> ;	   THE CORRESPONDING VECTOR INTO INTERRUPT 41	:
  3890                              <1> ;	   FOR DRIVE 0 AND INTERRUPT 46 FOR DRIVE 1.	:
  3891                              <1> ;							:
  3892                              <1> ;--------------------------------------------------------
  3893                              <1> 
  3894                              <1> ;--------------------------------------------------------
  3895                              <1> ;							:
  3896                              <1> ; HARDWARE SPECIFIC VALUES				:
  3897                              <1> ;							:
  3898                              <1> ;  -  CONTROLLER I/O PORT				:
  3899                              <1> ;							:
  3900                              <1> ;     > WHEN READ FROM: 				:
  3901                              <1> ;	HF_PORT+0 - READ DATA (FROM CONTROLLER TO CPU)	:
  3902                              <1> ;	HF_PORT+1 - GET ERROR REGISTER			:
  3903                              <1> ;	HF_PORT+2 - GET SECTOR COUNT			:
  3904                              <1> ;	HF_PORT+3 - GET SECTOR NUMBER			:
  3905                              <1> ;	HF_PORT+4 - GET CYLINDER LOW			:
  3906                              <1> ;	HF_PORT+5 - GET CYLINDER HIGH (2 BITS)		:
  3907                              <1> ;	HF_PORT+6 - GET SIZE/DRIVE/HEAD 		:
  3908                              <1> ;	HF_PORT+7 - GET STATUS REGISTER 		:
  3909                              <1> ;							:
  3910                              <1> ;     > WHEN WRITTEN TO:				:
  3911                              <1> ;	HF_PORT+0 - WRITE DATA (FROM CPU TO CONTROLLER) :
  3912                              <1> ;	HF_PORT+1 - SET PRECOMPENSATION CYLINDER	:
  3913                              <1> ;	HF_PORT+2 - SET SECTOR COUNT			:
  3914                              <1> ;	HF_PORT+3 - SET SECTOR NUMBER			:
  3915                              <1> ;	HF_PORT+4 - SET CYLINDER LOW			:
  3916                              <1> ;	HF_PORT+5 - SET CYLINDER HIGH (2 BITS)		:
  3917                              <1> ;	HF_PORT+6 - SET SIZE/DRIVE/HEAD 		:
  3918                              <1> ;	HF_PORT+7 - SET COMMAND REGISTER		:
  3919                              <1> ;							:
  3920                              <1> ;--------------------------------------------------------
  3921                              <1> 
  3922                              <1> ;HF_PORT 	EQU	01F0H	; DISK PORT
  3923                              <1> ;HF1_PORT	equ	0170h	
  3924                              <1> ;HF_REG_PORT	EQU	03F6H
  3925                              <1> ;HF1_REG_PORT	equ	0376h
  3926                              <1> 
  3927                              <1> HDC1_BASEPORT	equ	1F0h
  3928                              <1> HDC2_BASEPORT	equ	170h		
  3929                              <1> 
  3930 00004E75 90                  <1> align 2
  3931                              <1> 
  3932                              <1> ;-----		STATUS REGISTER
  3933                              <1> 
  3934                              <1> ST_ERROR	EQU	00000001B	;
  3935                              <1> ST_INDEX	EQU	00000010B	;
  3936                              <1> ST_CORRCTD	EQU	00000100B	; ECC CORRECTION SUCCESSFUL
  3937                              <1> ST_DRQ		EQU	00001000B	;
  3938                              <1> ST_SEEK_COMPL	EQU	00010000B	; SEEK COMPLETE
  3939                              <1> ST_WRT_FLT	EQU	00100000B	; WRITE FAULT
  3940                              <1> ST_READY	EQU	01000000B	;
  3941                              <1> ST_BUSY 	EQU	10000000B	;
  3942                              <1> 
  3943                              <1> ;-----		ERROR REGISTER
  3944                              <1> 
  3945                              <1> ERR_DAM 	EQU	00000001B	; DATA ADDRESS MARK NOT FOUND
  3946                              <1> ERR_TRK_0	EQU	00000010B	; TRACK 0 NOT FOUND ON RECAL
  3947                              <1> ERR_ABORT	EQU	00000100B	; ABORTED COMMAND
  3948                              <1> ;		EQU	00001000B	; NOT USED
  3949                              <1> ERR_ID		EQU	00010000B	; ID NOT FOUND
  3950                              <1> ;		EQU	00100000B	; NOT USED
  3951                              <1> ERR_DATA_ECC	EQU	01000000B
  3952                              <1> ERR_BAD_BLOCK	EQU	10000000B
  3953                              <1> 
  3954                              <1> 
  3955                              <1> RECAL_CMD	EQU	00010000B	; DRIVE RECAL	(10H)
  3956                              <1> READ_CMD	EQU	00100000B	;	READ	(20H)
  3957                              <1> WRITE_CMD	EQU	00110000B	;	WRITE	(30H)
  3958                              <1> VERIFY_CMD	EQU	01000000B	;	VERIFY	(40H)
  3959                              <1> FMTTRK_CMD	EQU	01010000B	; FORMAT TRACK	(50H)
  3960                              <1> INIT_CMD	EQU	01100000B	;   INITIALIZE	(60H)
  3961                              <1> SEEK_CMD	EQU	01110000B	;	SEEK	(70H)
  3962                              <1> DIAG_CMD	EQU	10010000B	; DIAGNOSTIC	(90H)
  3963                              <1> SET_PARM_CMD	EQU	10010001B	; DRIVE PARMS	(91H)
  3964                              <1> NO_RETRIES	EQU	00000001B	; CHD MODIFIER	(01H)
  3965                              <1> ECC_MODE	EQU	00000010B	; CMD MODIFIER	(02H)
  3966                              <1> BUFFER_MODE	EQU	00001000B	; CMD MODIFIER	(08H)
  3967                              <1> 
  3968                              <1> ;MAX_FILE	EQU	2
  3969                              <1> ;S_MAX_FILE	EQU	2
  3970                              <1> MAX_FILE	equ	4		; 22/12/2014
  3971                              <1> S_MAX_FILE	equ	4		; 22/12/2014
  3972                              <1> 
  3973                              <1> DELAY_1 	EQU	25H		; DELAY FOR OPERATION COMPLETE
  3974                              <1> DELAY_2 	EQU	0600H		; DELAY FOR READY
  3975                              <1> DELAY_3 	EQU	0100H		; DELAY FOR DATA REQUEST
  3976                              <1> 
  3977                              <1> HF_FAIL 	EQU	08H		; CMOS FLAG IN BYTE 0EH
  3978                              <1> 
  3979                              <1> ;-----		COMMAND BLOCK REFERENCE
  3980                              <1> 
  3981                              <1> ;CMD_BLOCK      EQU     BP-8            ; @CMD_BLOCK REFERENCES BLOCK HEAD IN SS
  3982                              <1> 					;  (BP) POINTS TO COMMAND BLOCK TAIL
  3983                              <1> 					;	AS DEFINED BY THE "ENTER" PARMS
  3984                              <1> ; 19/12/2014
  3985                              <1> ORG_VECTOR	equ	4*13h		; INT 13h vector
  3986                              <1> DISK_VECTOR	equ	4*40h		; INT 40h vector (for floppy disks)
  3987                              <1> ;HDISK_INT	equ	4*76h		; Primary HDC - Hardware interrupt (IRQ14)
  3988                              <1> ;HDISK_INT1	equ	4*76h		; Primary HDC - Hardware interrupt (IRQ14)
  3989                              <1> ;HDISK_INT2	equ	4*77h		; Secondary HDC - Hardware interrupt (IRQ15)
  3990                              <1> ;HF_TBL_VEC	equ	4*41h		; Pointer to 1st fixed disk parameter table
  3991                              <1> ;HF1_TBL_VEC	equ	4*46h		; Pointer to 2nd fixed disk parameter table
  3992                              <1> 
  3993                              <1> align 2
  3994                              <1> 
  3995                              <1> ;----------------------------------------------------------------
  3996                              <1> ; FIXED DISK I/O SETUP						:
  3997                              <1> ;								:
  3998                              <1> ;  -  ESTABLISH TRANSFER VECTORS FOR THE FIXED DISK		:
  3999                              <1> ;  -  PERFORM POWER ON DIAGNOSTICS				:
  4000                              <1> ;     SHOULD AN ERROR OCCUR A "1701" MESSAGE IS DISPLAYED       :
  4001                              <1> ;								:
  4002                              <1> ;----------------------------------------------------------------
  4003                              <1> 
  4004                              <1> ; 09/08/2022
  4005                              <1> ; 06/08/2022 - TRDOS 386 Kernel v2.0.5
  4006                              <1> ; 29/05/2016 - TRDOS 386 (TRDOS v2.0)
  4007                              <1> 
  4008                              <1> DISK_SETUP:
  4009                              <1> 	;CLI
  4010                              <1> 	;;mov	ax, ABS0 		; GET ABSOLUTE SEGMENT
  4011                              <1> 	;xor	ax, ax
  4012                              <1> 	;mov	ds, ax			; SET SEGMENT REGISTER
  4013                              <1> 	;mov	ax, [ORG_VECTOR] 	; GET DISKETTE VECTOR
  4014                              <1> 	;mov	[DISK_VECTOR], ax	;  INTO INT 40H
  4015                              <1> 	;mov	ax, [ORG_VECTOR+2]
  4016                              <1> 	;mov	[DISK_VECTOR+2], ax
  4017                              <1> 	;mov	word [ORG_VECTOR], DISK_IO ; FIXED DISK HANDLER
  4018                              <1> 	;mov	[ORG_VECTOR+2], cs
  4019                              <1> 	; 1st controller (primary master, slave)   - IRQ 14
  4020                              <1> 	;;mov	word [HDISK_INT], HD_INT   ; FIXED DISK INTERRUPT
  4021                              <1> 	;mov	word [HDISK_INT1], HD_INT  ;
  4022                              <1> 	;;mov	[HDISK_INT+2], cs
  4023                              <1> 	;mov	[HDISK_INT1+2], cs
  4024                              <1> 	; 2nd controller (secondary master, slave) - IRQ 15
  4025                              <1> 	;mov	word [HDISK_INT2], HD1_INT ;
  4026                              <1> 	;mov	[HDISK_INT2+2], cs
  4027                              <1> 	;
  4028                              <1> 	;;mov	word [HF_TBL_VEC], HD0_DPT	; PARM TABLE DRIVE 80
  4029                              <1> 	;;mov	word [HF_TBL_VEC+2], DPT_SEGM
  4030                              <1> 	;;mov	word [HF1_TBL_VEC], HD1_DPT	; PARM TABLE DRIVE 81
  4031                              <1> 	;;mov	word [HF1_TBL_VEC+2], DPT_SEGM
  4032                              <1> 	;push	cs
  4033                              <1> 	;pop	ds
  4034                              <1> 	;mov	word [HDPM_TBL_VEC], HD0_DPT	; PARM TABLE DRIVE 80h
  4035                              <1> 	;mov	word [HDPM_TBL_VEC+2], DPT_SEGM
  4036 00004E76 C705[E4770100]0000- <1> 	mov 	dword [HDPM_TBL_VEC], (DPT_SEGM*16)+HD0_DPT
  4036 00004E7E 0900                <1>
  4037                              <1> 	;mov	word [HDPS_TBL_VEC], HD1_DPT	; PARM TABLE DRIVE 81h
  4038                              <1> 	;mov	word [HDPS_TBL_VEC+2], DPT_SEGM
  4039 00004E80 C705[E8770100]2000- <1> 	mov 	dword [HDPS_TBL_VEC], (DPT_SEGM*16)+HD1_DPT
  4039 00004E88 0900                <1>
  4040                              <1> 	;mov	word [HDSM_TBL_VEC], HD2_DPT	; PARM TABLE DRIVE 82h
  4041                              <1> 	;mov	word [HDSM_TBL_VEC+2], DPT_SEGM
  4042 00004E8A C705[EC770100]4000- <1> 	mov 	dword [HDSM_TBL_VEC], (DPT_SEGM*16)+HD2_DPT
  4042 00004E92 0900                <1>
  4043                              <1> 	;mov	word [HDSS_TBL_VEC], HD3_DPT	; PARM TABLE DRIVE 83h
  4044                              <1> 	;mov	word [HDSS_TBL_VEC+2], DPT_SEGM
  4045 00004E94 C705[F0770100]6000- <1> 	mov 	dword [HDSS_TBL_VEC], (DPT_SEGM*16)+HD3_DPT
  4045 00004E9C 0900                <1>
  4046                              <1> 	;
  4047                              <1> 	;;in	al, INTB01		; TURN ON SECOND INTERRUPT CHIP
  4048                              <1> 	;;;and	al, 0BFh
  4049                              <1> 	;;and	al, 3Fh			; enable IRQ 14 and IRQ 15
  4050                              <1> 	;;;jmp	$+2
  4051                              <1> 	;;IODELAY
  4052                              <1> 	;;out	INTB01, al
  4053                              <1> 	;;IODELAY
  4054                              <1> 	;;in	al, INTA01		; LET INTERRUPTS PASS THRU TO
  4055                              <1> 	;;and	al, 0FBh 		;  SECOND CHIP
  4056                              <1> 	;;;jmp	$+2
  4057                              <1> 	;;IODELAY
  4058                              <1> 	;;out	INTA01, al
  4059                              <1> 	;
  4060                              <1> 	;sti
  4061                              <1> 	;;push	ds			; MOVE ABS0 POINTER TO
  4062                              <1> 	;;pop	es			; EXTRA SEGMENT POINTER
  4063                              <1> 	;;;call	DDS			; ESTABLISH DATA SEGMENT
  4064                              <1> 	;;mov	byte [DISK_STATUS1], 0 	; RESET THE STATUS INDICATOR
  4065                              <1> 	;;mov	byte [HF_NUM], 0	; ZERO NUMBER OF FIXED DISKS
  4066                              <1> 	;;mov	byte [CONTROL_BYTE], 0
  4067                              <1> 	;;mov	byte [PORT_OFF], 0	; ZERO CARD OFFSET
  4068                              <1> 	; 20/12/2014 - private code by Erdogan Tan
  4069                              <1> 		      ; (out of original PC-AT, PC-XT BIOS code)
  4070                              <1> 	;mov	si, hd0_type
  4071 00004E9E BE[7E650000]        <1> 	mov	esi, hd0_type
  4072                              <1> 	;;mov	cx, 4
  4073                              <1> 	;mov	ecx, 4
  4074                              <1> 	; 06/08/2022
  4075 00004EA3 29C9                <1> 	sub	ecx, ecx
  4076 00004EA5 B104                <1> 	mov	cl, 4
  4077                              <1> hde_l:
  4078 00004EA7 AC                  <1> 	lodsb
  4079 00004EA8 3C80                <1> 	cmp	al, 80h			; 8?h = existing
  4080 00004EAA 7206                <1> 	jb	short _L4
  4081 00004EAC FE05[E0770100]      <1> 	inc	byte [HF_NUM]		; + 1 hard (fixed) disk drives
  4082                              <1> _L4: ; 26/02/2015
  4083 00004EB2 E2F3                <1> 	loop	hde_l	
  4084                              <1> ;_L4:					; 0 <= [HF_NUM] =< 4
  4085                              <1> ;L4:
  4086                              <1> 	;; 31/12/2014 - cancel controller diagnostics here
  4087                              <1> 	;;;mov 	cx, 3  ; 26/12/2014 (Award BIOS 1999)
  4088                              <1> 	;;mov 	cl, 3
  4089                              <1> 	;;
  4090                              <1> 	;;mov	DL, 80H			; CHECK THE CONTROLLER
  4091                              <1> ;;hdc_dl:
  4092                              <1> 	;;mov	AH, 14H			; USE CONTROLLER DIAGNOSTIC COMMAND
  4093                              <1> 	;;INT	13H			; CALL BIOS WITH DIAGNOSTIC COMMAND
  4094                              <1> 	;;;jc	short CTL_ERRX		; DISPLAY ERROR MESSAGE IF BAD RETURN
  4095                              <1> 	;;;jc	short POD_DONE ;22/12/2014
  4096                              <1> 	;;jnc	short hdc_reset0
  4097                              <1> 	;;loop	hdc_dl
  4098                              <1> 	;;; 27/12/2014
  4099                              <1> 	;;stc
  4100                              <1> 	;;retn
  4101                              <1> 	;
  4102                              <1> ;;hdc_reset0:
  4103                              <1> 	; 18/01/2015
  4104 00004EB4 8A0D[E0770100]      <1> 	mov	cl, [HF_NUM]
  4105 00004EBA 20C9                <1> 	and	cl, cl
  4106 00004EBC 740D                <1> 	jz	short POD_DONE
  4107                              <1> 	;
  4108 00004EBE B27F                <1> 	mov	dl, 7Fh
  4109                              <1> hdc_reset1:
  4110 00004EC0 FEC2                <1> 	inc	dl
  4111                              <1> 	;; 31/12/2015
  4112                              <1> 	;;push	dx
  4113                              <1> 	;;push	cx
  4114                              <1> 	;;push	ds
  4115                              <1> 	;;sub	ax, ax
  4116                              <1> 	;;mov	ds, ax
  4117                              <1> 	;;mov	ax, [TIMER_LOW]		; GET START TIMER COUNTS
  4118                              <1> 	;;pop	ds
  4119                              <1> 	;;mov	bx, ax
  4120                              <1> 	;;add	ax, 6*182		; 60 SECONDS* 18.2
  4121                              <1> 	;;mov	cx, ax
  4122                              <1> 	;;mov	word [wait_count], 0	; 22/12/2014 (reset wait counter)
  4123                              <1> 	;;
  4124                              <1> 	;; 31/12/2014 - cancel HD_RESET_1
  4125                              <1> 	;;call	HD_RESET_1		; SET UP DRIVE 0, (1,2,3)
  4126                              <1> 	;;pop	cx
  4127                              <1> 	;;pop	dx
  4128                              <1> 	;;
  4129                              <1> 	; 18/01/2015
  4130 00004EC2 B40D                <1> 	mov	ah, 0Dh ; ALTERNATE RESET
  4131                              <1> 	;int	13h
  4132 00004EC4 E8CC000000          <1> 	call	int13h
  4133 00004EC9 E2F5                <1> 	loop	hdc_reset1
  4134                              <1> 	;clc 	; 29/05/2016
  4135                              <1> POD_DONE:
  4136 00004ECB C3                  <1> 	retn
  4137                              <1> 
  4138                              <1> ;;-----	POD_ERROR
  4139                              <1> 
  4140                              <1> ;;CTL_ERRX:
  4141                              <1> ;	;mov	SI,OFFSET F1782 	; CONTROLLER ERROR
  4142                              <1> ;	;call	SET_FAIL		; DO NOT IPL FROM DISK
  4143                              <1> ;	;call	E_MSG			; DISPLAY ERROR AND SET (BP) ERROR FLAG
  4144                              <1> ;	;jmp	short POD_DONE
  4145                              <1> 
  4146                              <1> ;;HD_RESET_1:
  4147                              <1> ;;	;push	BX			; SAVE TIMER LIMITS
  4148                              <1> ;;	;push	CX
  4149                              <1> ;;RES_1: mov	AH,09H			; SET DRIVE PARAMETERS
  4150                              <1> ;;	INT	13H
  4151                              <1> ;;	jc	short RES_2
  4152                              <1> ;;	mov	AH,11h			; RECALIBRATE DRIVE
  4153                              <1> ;;	INT	13H
  4154                              <1> ;;	jnc	short RES_CK		; DRIVE OK
  4155                              <1> ;;RES_2: ;call	POD_TCHK		; CHECK TIME OUT
  4156                              <1> ;;	cmp	word [wait_count], 6*182 ; waiting time (in timer ticks)
  4157                              <1> ;;					; (30 seconds)		
  4158                              <1> ;;	;cmc
  4159                              <1> ;;	;jnc	short RES_1
  4160                              <1> ;;	jb	short RES_1
  4161                              <1> ;;;RES_FL: ;mov	SI,OFFSET F1781 	; INDICATE DISK 1 FAILURE;
  4162                              <1> ;;	;test	DL,1
  4163                              <1> ;;	;jnz	short RES_E1
  4164                              <1> ;;	;mov	SI,OFFSET F1780 	; INDICATE DISK 0 FAILURE
  4165                              <1> ;;	;call	SET_FAIL		; DO NOT TRY TO IPL DISK 0
  4166                              <1> ;;	;jmp	SHORT RES_E1
  4167                              <1> ;;RES_ER: ; 22/12/2014
  4168                              <1> ;;RES_OK:
  4169                              <1> ;;	;pop	CX			; RESTORE TIMER LIMITS
  4170                              <1> ;;	;pop	BX
  4171                              <1> ;;	retn
  4172                              <1> ;;
  4173                              <1> ;;RES_RS: mov	AH,00H			; RESET THE DRIVE
  4174                              <1> ;;	INT	13H
  4175                              <1> ;;RES_CK: mov	AH,08H			; GET MAX CYLINDER,HEAD,SECTOR
  4176                              <1> ;;	mov	BL,DL			; SAVE DRIVE CODE
  4177                              <1> ;;	INT	13H
  4178                              <1> ;;	jc	short RES_ER
  4179                              <1> ;;	mov	[NEC_STATUS],CX 	; SAVE MAX CYLINDER, SECTOR
  4180                              <1> ;;	mov	DL,BL			; RESTORE DRIVE CODE
  4181                              <1> ;;RES_3: mov	AX,0401H		; VERIFY THE LAST SECTOR
  4182                              <1> ;;	INT	13H
  4183                              <1> ;;	jnc	short RES_OK		; VERIFY OK
  4184                              <1> ;;	cmp	AH,BAD_SECTOR		; OK ALSO IF JUST ID READ
  4185                              <1> ;;	JE	short RES_OK
  4186                              <1> ;;	cmp	AH,DATA_CORRECTED
  4187                              <1> ;;	JE	short RES_OK
  4188                              <1> ;;	cmp	AH,BAD_ECC
  4189                              <1> ;;	JE	short RES_OK
  4190                              <1> ;;	;call	POD_TCHK		; CHECK FOR TIME OUT
  4191                              <1> ;;	cmp	word [wait_count], 6*182 ; waiting time (in timer ticks)
  4192                              <1> ;;					; (60 seconds)		
  4193                              <1> ;;	cmc
  4194                              <1> ;;	jc	short RES_ER		; FAILED
  4195                              <1> ;;	mov	CX,[NEC_STATUS] 	; GET SECTOR ADDRESS, AND CYLINDER
  4196                              <1> ;;	mov	AL,CL			; SEPARATE OUT SECTOR NUMBER
  4197                              <1> ;;	and	AL,3FH
  4198                              <1> ;;	dec	AL			; TRY PREVIOUS ONE
  4199                              <1> ;;	jz	short RES_RS		; WE'VE TRIED ALL SECTORS ON TRACK
  4200                              <1> ;;	and	CL,0C0H 		; KEEP CYLINDER BITS
  4201                              <1> ;;	OR	CL,AL			; MERGE SECTOR WITH CYLINDER BITS
  4202                              <1> ;;	mov	[NEC_STATUS],CX 	; SAVE CYLINDER, NEW SECTOR NUMBER
  4203                              <1> ;;	jmp	short RES_3		; TRY AGAIN
  4204                              <1> ;;;RES_ER: mov	SI,OFFSET F1791 	; INDICATE DISK 1 ERROR
  4205                              <1> ;;	;test	DL,1
  4206                              <1> ;;	;jnz	short RES_E1
  4207                              <1> ;;	;mov	SI,OFFSET F1790 	; INDICATE DISK 0 ERROR
  4208                              <1> ;;;RES_E1:
  4209                              <1> ;;	;call	E_MSG			; DISPLAY ERROR AND SET (BP) ERROR FLAG
  4210                              <1> ;;;RES_OK:
  4211                              <1> ;;	;pop	CX			; RESTORE TIMER LIMITS
  4212                              <1> ;;	;pop	BX
  4213                              <1> ;;	;retn
  4214                              <1> ;
  4215                              <1> ;;SET_FAIL:
  4216                              <1> ;	;mov	AX,X*(CMOS_DIAG+NMI)	; GET CMOS ERROR BYTE
  4217                              <1> ;	;call	CMOS_READ
  4218                              <1> ;	;OR	AL,HF_FAIL		; SET DO NOT IPL FROM DISK FLAG
  4219                              <1> ;	;xchg	AH,AL			; SAVE IT
  4220                              <1> ;	;call	CMOS_WRITE		; PUT IT OUT
  4221                              <1> ;	;retn
  4222                              <1> ;
  4223                              <1> ;;POD_TCHK:				; CHECK FOR 30 SECOND TIME OUT
  4224                              <1> ;	;pop	AX			; SAVE RETURN
  4225                              <1> ;	;pop	CX			; GET TIME OUT LIMITS
  4226                              <1> ;	;pop	BX
  4227                              <1> ;	;push	BX			; AND SAVE THEM AGAIN
  4228                              <1> ;	;push	CX
  4229                              <1> ;	;push	AX
  4230                              <1> ;	;push	ds
  4231                              <1> ;	;xor	ax, ax
  4232                              <1> ;	;mov	ds, ax			; RESTORE RETURN
  4233                              <1> ;	;mov	AX, [TIMER_LOW]		; AX = CURRENT TIME
  4234                              <1> ;	;				; BX = START TIME
  4235                              <1> ;	;				; CX = END TIME
  4236                              <1> ;	;pop	ds
  4237                              <1> ;	;cmp	BX,CX
  4238                              <1> ;	;JB	short TCHK1		; START < END
  4239                              <1> ;	;cmp	BX,AX
  4240                              <1> ;	;JB	short TCHKG		; END < START < CURRENT
  4241                              <1> ;	;jmp	SHORT TCHK2		; END, CURRENT < START
  4242                              <1> ;;TCHK1: cmp	AX,BX
  4243                              <1> ;;	JB	short TCHKNG		; CURRENT < START < END
  4244                              <1> ;;TCHK2: cmp	AX,CX
  4245                              <1> ;;	JB	short TCHKG		; START < CURRENT < END
  4246                              <1> ;;					; OR CURRENT < END < START
  4247                              <1> ;;TCHKNG: STC				; CARRY SET INDICATES TIME OUT
  4248                              <1> ;;	retn
  4249                              <1> ;;TCHKG: CLC				; INDICATE STILL TIME
  4250                              <1> ;;	retn
  4251                              <1> ;;
  4252                              <1> ;;int_13h:
  4253                              <1> 
  4254                              <1> ;----------------------------------------
  4255                              <1> ;	FIXED DISK BIOS ENTRY POINT	:
  4256                              <1> ;----------------------------------------
  4257                              <1> 
  4258                              <1> ; 17/07/2022
  4259                              <1> ; 16/07/2022
  4260                              <1> ; 13/07/2022 - TRDOS 386 v2.0.5
  4261                              <1> ; 15/01/2017
  4262                              <1> ; 14/01/2017
  4263                              <1> ; 07/01/2017
  4264                              <1> ; 02/01/2017
  4265                              <1> ; 01/06/2016
  4266                              <1> ; 16/05/2016, 27/05/2016, 28/05/2016, 29/05/2016
  4267                              <1> ; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
  4268                              <1> int33h: ; DISK I/O
  4269                              <1> 	; 29/05/2016
  4270 00004ECC 80642408FE          <1> 	and	byte [esp+8], 11111110b  ; clear carry bit of eflags register
  4271                              <1> 
  4272                              <1> 	; 13/07/2022
  4273 00004ED1 06                  <1> 	push	es
  4274                              <1> 	; 16/05/2016
  4275 00004ED2 1E                  <1> 	push	ds
  4276 00004ED3 53                  <1> 	push	ebx ; user's buffer address (virtual)
  4277                              <1> 	; 13/07/2022
  4278 00004ED4 51                  <1> 	push	ecx
  4279 00004ED5 52                  <1> 	push	edx
  4280 00004ED6 56                  <1> 	push	esi
  4281 00004ED7 57                  <1> 	push	edi
  4282                              <1> 
  4283                              <1> 	;mov	bx, KDATA ; System (Kernel's) data segment
  4284                              <1> 	;mov	ds, bx
  4285                              <1> 	; 13/07/2022
  4286 00004ED8 66BF1000            <1> 	mov	di, KDATA
  4287 00004EDC 8EDF                <1> 	mov	ds, di
  4288 00004EDE 8EC7                <1> 	mov	es, di
  4289                              <1> 
  4290                              <1> 	;;15/01/2017
  4291                              <1> 	; 14/01/2017
  4292                              <1> 	; 02/01/2017
  4293                              <1> 	;;mov	byte [intflg], 33h  ; disk io interrupt 
  4294                              <1> 	;pop	ebx
  4295                              <1> 
  4296                              <1> 	; 13/07/2022
  4297                              <1> 	;pop	dword [user_buffer] ; 01/06/2016
  4298 00004EE0 891D[D0830100]      <1> 	mov	[user_buffer], ebx		
  4299                              <1> 
  4300 00004EE6 C605[0A7D0100]00    <1> 	mov	byte [scount], 0 ; sector count for transfer
  4301 00004EED 80FC03              <1> 	cmp	ah, 03h ; chs write
  4302 00004EF0 773C                <1> 	ja	short int33h_2
  4303 00004EF2 7407                <1> 	je	short int33h_0
  4304 00004EF4 80FC02              <1> 	cmp	ah, 02h ; chs read
  4305 00004EF7 7267                <1> 	jb	short int33h_5
  4306 00004EF9 EB5A                <1> 	jmp	short int33h_4
  4307                              <1> int33h_0:
  4308                              <1> 	;; 17/07/2022 - 64K r/w buffer limit check ?
  4309                              <1> 	;cmp	al, 80h ; 128	
  4310                              <1> 	;ja	short int33h_8 ; error
  4311                              <1> 	;; 17/07/2022 - zero r/w count check ?
  4312                              <1> 	;or	al, al
  4313                              <1> 	;jz	short int33h_8 ; error
  4314                              <1> 	
  4315                              <1> 	; 17/07/2022 (buffer limit and zero count check)
  4316 00004EFB FEC8                <1> 	dec	al
  4317 00004EFD 781A                <1> 	js	short int33h_8 ; error
  4318 00004EFF FEC0                <1> 	inc	al	
  4319                              <1> 
  4320                              <1> 	; transfer user's buffer content to sector buffer
  4321 00004F01 51                  <1> 	push	ecx
  4322 00004F02 0FB6C8              <1> 	movzx	ecx, al
  4323                              <1> int33h_1:
  4324                              <1> 	; 13/07/2022
  4325                              <1> 	;push	esi
  4326                              <1> 	;mov	esi, [user_buffer]
  4327 00004F05 89DE                <1> 	mov	esi, ebx
  4328                              <1> 	; esi = user's buffer address (virtual, ebx)
  4329                              <1> 	;push	edi
  4330                              <1> 	;push	es
  4331 00004F07 50                  <1> 	push	eax
  4332                              <1> 	;mov	ax, KDATA
  4333                              <1> 	;mov	es, ax
  4334 00004F08 BF00000700          <1> 	mov	edi, Cluster_Buffer
  4335 00004F0D C1E109              <1> 	shl	ecx, 9 ; * 512
  4336 00004F10 E8DEBE0000          <1> 	call	transfer_from_user_buffer
  4337                              <1> 		; (ecx and eax will be modified)
  4338 00004F15 58                  <1> 	pop	eax
  4339                              <1> 	; 13/07/2022
  4340                              <1> 	;pop	es
  4341                              <1> 	;pop	edi
  4342                              <1> 	;pop	esi
  4343 00004F16 59                  <1> 	pop	ecx
  4344 00004F17 7347                <1> 	jnc	short int33h_5
  4345                              <1> 
  4346                              <1> 	;mov	ebx, [user_buffer] ; 01/06/2016
  4347                              <1> 	;pop	ds
  4348                              <1> 
  4349                              <1> int33h_8:
  4350                              <1> 	; 13/07/2022
  4351 00004F19 B8FF000000          <1> 	mov	eax, 0FFh ; Unknown error !?
  4352                              <1> int33h_9:
  4353 00004F1E 5F                  <1> 	pop	edi
  4354 00004F1F 5E                  <1> 	pop	esi
  4355 00004F20 5A                  <1> 	pop	edx
  4356 00004F21 59                  <1> 	pop	ecx
  4357 00004F22 5B                  <1> 	pop	ebx
  4358 00004F23 1F                  <1> 	pop	ds
  4359 00004F24 07                  <1> 	pop	es
  4360                              <1> 
  4361                              <1> 	; 13/07/2022
  4362 00004F25 7305                <1> 	jnc	short int33h_7
  4363                              <1> 
  4364                              <1> 	;;15/01/2017
  4365                              <1> 	; 02/01/2017
  4366                              <1> 	;cli
  4367                              <1> 	;;mov	byte [ss:intflg], 0 ; 07/01/2017
  4368                              <1> 	;
  4369                              <1> 	; (*) 29/05/2016
  4370                              <1> 	; (*) retf 4 ; skip eflags on stack
  4371                              <1> 
  4372                              <1> 	; 29/05/2016 -set carry flag on stack-
  4373                              <1> 	; [esp] = EIP
  4374                              <1> 	; [esp+4] = CS
  4375                              <1> 	; [esp+8] = E-FLAGS
  4376 00004F27 804C240801          <1> 	or	byte [esp+8], 1  ; set carry bit of eflags register
  4377                              <1> 	; [esp+12] = ESP (user)
  4378                              <1> 	; [esp+16] = SS (User)
  4379                              <1> 	;
  4380                              <1> 	; 13/07/2022
  4381                              <1> int33h_7:	
  4382 00004F2C FA                  <1> 	cli
  4383                              <1> 	;;15/01/2017
  4384                              <1> 	;;mov	byte [ss:intflg], 0 ; 07/01/2017
  4385                              <1> 	; cf = 0  ; use eflags which is in stack
  4386 00004F2D CF                  <1> 	iretd	
  4387                              <1> 
  4388                              <1> 	; (*) 29/05/2016 - 'retf 4' intruction causes to stack fault
  4389                              <1> 	; (OUTER-PRIVILEGE-LEVEL)
  4390                              <1> 	; INTEL 80386 PROGRAMMER'S REFERENCE MANUAL 1986
  4391                              <1> 	; // RETF instruction:
  4392                              <1> 	;
  4393                              <1> 	; IF OperandMode=32 THEN
  4394                              <1>  	;    Load CS:EIP from stack;
  4395                              <1>  	;    Set CS RPL to CPL;
  4396                              <1>  	;    Increment ESP by 8 plus the immediate offset if it exists;
  4397                              <1>  	;    Load SS:ESP from stack;
  4398                              <1>  	; ELSE (* OperandMode=16 *)
  4399                              <1>  	;    Load CS:IP from stack;
  4400                              <1>  	;    Set CS RPL to CPL;
  4401                              <1>  	;    Increment ESP by 4 plus the immediate offset if it exists;
  4402                              <1> 	;    Load SS:ESP from stack;
  4403                              <1>  	; FI;
  4404                              <1> 	;
  4405                              <1> 	; //
  4406                              <1> 
  4407                              <1> int33h_2:
  4408 00004F2E 80FC05              <1> 	cmp	ah, 05h ; format track
  4409 00004F31 7709                <1> 	ja	short int33h_3
  4410 00004F33 722B                <1> 	jb	short int33h_5
  4411 00004F35 51                  <1> 	push	ecx
  4412                              <1> 	;mov	ecx, 1
  4413                              <1> 	; 17/07/2022
  4414 00004F36 31C9                <1> 	xor	ecx, ecx
  4415 00004F38 FEC1                <1> 	inc	cl
  4416                              <1> 	; ecx = 1
  4417 00004F3A EBC9                <1> 	jmp	short int33h_1
  4418                              <1> int33h_3:
  4419 00004F3C 80FC1C              <1> 	cmp	ah, 1Ch ; LBA write
  4420 00004F3F 771F                <1> 	ja	short int33h_5
  4421 00004F41 74B8                <1> 	je	short int33h_0
  4422 00004F43 80FC1B              <1> 	cmp	ah, 1Bh ; LBA read
  4423 00004F46 740D                <1> 	je	short int33h_4
  4424 00004F48 80FC08              <1> 	cmp	ah, 08h ; get disk parameters
  4425 00004F4B 7513                <1> 	jne	short int33h_5
  4426                              <1> 	; 01/06/2016
  4427 00004F4D 8B1D[D0830100]      <1> 	mov	ebx, [user_buffer] ; user's buffer address
  4428 00004F53 EB10                <1> 	jmp	short int33h_6
  4429                              <1> int33h_4:
  4430                              <1> 	;; 17/07/2022 - 64K r/w buffer limit check ?
  4431                              <1> 	;cmp	al, 80h ; 128	
  4432                              <1> 	;ja	short int33h_8 ; error
  4433                              <1> 	;; 17/07/2022 - zero r/w count check ?
  4434                              <1> 	;or	al, al
  4435                              <1> 	;jz	short int33h_8 ; error
  4436                              <1> 
  4437                              <1> 	; 17/07/2022 (buffer limit and zero count check)
  4438 00004F55 FEC8                <1> 	dec	al
  4439 00004F57 78C0                <1> 	js	short int33h_8 ; error
  4440 00004F59 FEC0                <1> 	inc	al
  4441                              <1> 
  4442 00004F5B A2[0A7D0100]        <1> 	mov	byte [scount], al ; <= 128 sectors
  4443                              <1> int33h_5:
  4444 00004F60 BB00000700          <1> 	mov	ebx, Cluster_Buffer ; max. 65536 bytes
  4445                              <1> 				    ; buf. addr: 70000h	
  4446                              <1> 	;mov	byte [ClusterBuffer_Valid], 0
  4447                              <1> int33h_6:
  4448                              <1> 	; 13/07/2022
  4449                              <1> 	;pop	ds
  4450                              <1> 	;pushfd
  4451                              <1> 	;push 	cs
  4452                              <1> 	
  4453 00004F65 E83B000000          <1> 	call 	DISK_IO
  4454                              <1> 	
  4455                              <1> 	;;mov	ebx, [cs:user_buffer] ; 01/06/2016
  4456                              <1> 	;mov	ebx, [user_buffer] ; 13/07/2022 
  4457 00004F6A 72B2                <1> 	jc	short int33h_9
  4458                              <1> 	;
  4459                              <1> 	;cmp	byte [cs:scount], 0
  4460                              <1> 	;jna	short int33h_7	
  4461 00004F6C 803D[0A7D0100]00    <1> 	cmp	byte [scount], 0 ; 13/07/2022
  4462 00004F73 76A9                <1> 	jna	short int33h_9
  4463                              <1> 
  4464                              <1> 	; 13/07/2022
  4465                              <1> 
  4466                              <1> 	; transfer sector buffer content to user's buffer
  4467                              <1> 	;push	es
  4468                              <1> 	;push	ds
  4469                              <1> 	;push	eax
  4470                              <1> 	;mov	ax, KDATA
  4471                              <1> 	;mov	ds, ax
  4472                              <1> 	;mov	es, ax
  4473                              <1> 	;push	ecx
  4474                              <1> 	;push	esi
  4475                              <1> 	;push	edi
  4476                              <1> 	
  4477                              <1> 	; 13/07/2022
  4478 00004F75 50                  <1> 	push	eax
  4479 00004F76 0FB60D[0A7D0100]    <1> 	movzx	ecx, byte [scount]
  4480 00004F7D C1E109              <1> 	shl	ecx, 9 ; * 512 bytes
  4481                              <1> 	;mov	edi, ebx ; user's buffer address
  4482 00004F80 8B3D[D0830100]      <1> 	mov	edi, [user_buffer] ; 13/07/2022
  4483 00004F86 BE00000700          <1> 	mov	esi, Cluster_Buffer
  4484 00004F8B E819BE0000          <1> 	call	transfer_to_user_buffer 
  4485                              <1> 		; (ecx and eax will be modified)
  4486 00004F90 58                  <1> 	pop	eax
  4487                              <1> 
  4488                              <1> 	; 13/07/2022
  4489 00004F91 7286                <1> 	jc	short int33h_8 ; eax = 0FFh
  4490 00004F93 EB89                <1> 	jmp	short int33h_9 ; cf = 0
  4491                              <1> 
  4492                              <1> 	;pop	edi
  4493                              <1> 	;pop	esi
  4494                              <1> 	;pop	ecx
  4495                              <1> 	;pop	eax
  4496                              <1> 	;pop	ds
  4497                              <1> 	;pop	es
  4498                              <1> 	;jc	short int33h_8
  4499                              <1> ;int33h_7:
  4500                              <1> 	;cli
  4501                              <1> 	;;;15/01/2017
  4502                              <1> 	;;;mov	byte [ss:intflg], 0 ; 07/01/2017
  4503                              <1> 	;; cf = 0  ; use eflags which is in stack
  4504                              <1> 	;iretd	
  4505                              <1> ;int33h_8:
  4506                              <1> 	;mov	eax, 0FFh ; Unknown error !?
  4507                              <1> 	; 13/07/2022
  4508                              <1> 	;xor	eax, eax
  4509                              <1> 	;dec	al  ; eax = 0FFh	
  4510                              <1> 	;jmp	short int33h_9
  4511                              <1> 	 
  4512                              <1> ;int33h_9:
  4513                              <1> 	;; cf = 1
  4514                              <1> 	;
  4515                              <1> 	;; (*) 29/05/2016	
  4516                              <1> 	;; (*) retf 4 ; skip eflags on stack
  4517                              <1> 	;; Note: This 'retf 4' was wrong, -it was causing
  4518                              <1> 	;;       to stack errors in ring 3-
  4519                              <1> 	;;	POP sequence of 'retf 4' is as
  4520                              <1> 	;;       "eip, cs, eflags, esp, ss, +4 bytes" 
  4521                              <1>         ;;       it is not as "eip, cs, +4 bytes, esp, ss" ! 
  4522                              <1> 	;
  4523                              <1> 	;; 29/05/2016 -set carry flag on stack-
  4524                              <1> 	;or	byte [esp+8], 1  ; set carry bit of eflags register
  4525                              <1> 	;;iretd
  4526                              <1> 	;jmp	short int33h_7 ; 07/01/2017
  4527                              <1> 
  4528                              <1> ;; 11/04/2021
  4529                              <1> ;int13h: ; 21/02/2015
  4530                              <1> ;	clc ; 11/04/2021
  4531                              <1> ;	pushfd
  4532                              <1> ;	push 	cs
  4533                              <1> ;	call 	DISK_IO
  4534                              <1> ;	retn
  4535                              <1> 
  4536                              <1> int13h:
  4537                              <1> 	; 13/07/2022 - TRDOS 386 v2.0.5
  4538                              <1> 	; Note: DISK_IO sets registers on stack
  4539                              <1> 	; 	as return parameters. So,
  4540                              <1> 	;	stack order (at the entry of 'DISK_IO')
  4541                              <1> 	;	must be same with 'int33h:' as above.
  4542                              <1> 		
  4543                              <1> 	;push	es ; not necessary
  4544                              <1> 	;push	ds ; not necessary
  4545                              <1> 	;
  4546                              <1> 	; following pushes are necessary
  4547                              <1> 	; for setting registers -return values- in DISK_IO
  4548 00004F95 53                  <1> 	push	ebx
  4549 00004F96 51                  <1> 	push	ecx
  4550 00004F97 52                  <1> 	push	edx
  4551 00004F98 56                  <1> 	push	esi
  4552 00004F99 57                  <1> 	push	edi
  4553                              <1> 	;push	ebp
  4554                              <1> 	;mov	ebp, esp
  4555                              <1> 	; edi = ebp+4
  4556                              <1> 	; esi = ebp+8
  4557                              <1> 	; edx = ebp+12
  4558                              <1> 	; ecx = ebp+16
  4559                              <1> 	; ebx = ebp+20
  4560                              <1> 	;
  4561 00004F9A E806000000          <1> 	call	DISK_IO
  4562                              <1> 	;
  4563 00004F9F 5F                  <1> 	pop	edi
  4564 00004FA0 5E                  <1> 	pop	esi
  4565 00004FA1 5A                  <1> 	pop	edx
  4566 00004FA2 59                  <1> 	pop	ecx
  4567 00004FA3 5B                  <1> 	pop	ebx	
  4568                              <1> 	;
  4569                              <1> 	;pop	ds
  4570                              <1> 	;pop	es
  4571                              <1> 	;
  4572 00004FA4 C3                  <1> 	retn
  4573                              <1> 
  4574                              <1> ; 10/08/2022
  4575                              <1> ; 07/08/2022
  4576                              <1> ; 17/07/2022
  4577                              <1> ; 13/07/2022 - TRDOS 386 v2.0.5
  4578                              <1> ; 18/04/2021 - TRDOS 386 v2.0.4
  4579                              <1> ; 11/04/2021 - TRDOS 386 v2.0.3
  4580                              <1> ; 30/08/2020
  4581                              <1> ; 09/12/2017
  4582                              <1> ; 29/05/2016
  4583                              <1> ; 27/05/2016 - TRDOS 386 (TRDOS v2.0)
  4584                              <1> 
  4585                              <1> DISK_IO:
  4586                              <1> 	; 10/08/2022
  4587                              <1> 	; 17/07/2022
  4588                              <1> 	; 13/07/2022
  4589                              <1> 	; Registers are also on stack 
  4590                              <1> 	; (with same contents) 
  4591                              <1> 	; in following order:
  4592                              <1> 	;
  4593                              <1> 	;    ebx = esp+20
  4594                              <1> 	;    ecx = esp+16
  4595                              <1> 	;    edx = esp+12
  4596                              <1> 	;    esi = esp+8
  4597                              <1> 	;    edi = esp+4
  4598                              <1> 
  4599                              <1> 	; cs = KCODE (== KDATA base address)
  4600                              <1> 	; ss = KDATA
  4601                              <1> 	; ds = KDATA
  4602                              <1> 	; es = KDATA
  4603                              <1> 
  4604                              <1> 	; 17/07/2022
  4605 00004FA5 FB                  <1> 	sti				; ENABLE INTERRUPTS
  4606                              <1> 
  4607 00004FA6 80FA80              <1> 	cmp	dl, 80h			; TEST FOR FIXED DISK DRIVE
  4608                              <1> 	;jae	short A1		; YES, HANDLE HERE
  4609                              <1> 	;;;int	40h			; DISKETTE HANDLER
  4610                              <1> 	;;call	int40h
  4611                              <1> 	;jb	DISKETTE_IO_1
  4612                              <1> ;RET_2:
  4613                              <1> 	;;retf	2			; BACK TO CALLER
  4614                              <1> 	;retf	4
  4615                              <1> 	; 11/04/2021
  4616 00004FA9 7305                <1> 	jnb	short A1
  4617 00004FAB E940F2FFFF          <1> 	jmp	DISKETTE_IO_1
  4618                              <1> A1:
  4619                              <1> 	;sti	 ; 17/07/2022		; ENABLE INTERRUPTS
  4620                              <1> 	
  4621                              <1> 	;; 04/01/2015
  4622                              <1> 	;;or	ah, ah
  4623                              <1> 	;;jnz	short A2
  4624                              <1> 	;;int	40h			; RESET NEC WHEN AH=0
  4625                              <1> 	;;sub	ah, ah
  4626                              <1> 	
  4627 00004FB0 80FA83              <1> 	cmp	dl, (80h + S_MAX_FILE - 1)
  4628                              <1> 	;ja	short RET_2
  4629 00004FB3 760A                <1> 	jna	short _A0
  4630                              <1> 	
  4631                              <1> 	; 13/07/2022
  4632                              <1> 	; (here, DS is KDATA segment already) 
  4633                              <1> 	;
  4634                              <1> 	; 29/05/2016
  4635                              <1> 	;push	ds
  4636                              <1> 	; 11/04/2021
  4637                              <1> 	;push	eax
  4638                              <1> 	;mov	ax, KDATA
  4639                              <1> 	;mov	ds, ax
  4640                              <1> 	; 11/04/2021
  4641                              <1> 	;pop	eax
  4642                              <1> 	
  4643 00004FB5 B4AA                <1> 	mov     ah, 0AAh        ; Hard disk drive not ready !
  4644                              <1> 				; (Programmer's guide to AMIBIOS, 1992)
  4645 00004FB7 8825[DF770100]      <1> 	mov     byte [DISK_STATUS1], ah
  4646                              <1> 	; 13/07/2022
  4647                              <1> 	;pop	ds
  4648                              <1> 	;jmp	short RET_2
  4649 00004FBD F9                  <1> 	stc
  4650 00004FBE C3                  <1> 	retn
  4651                              <1> _A0:
  4652                              <1> 	; 18/01/2015
  4653 00004FBF 08E4                <1> 	or	ah, ah
  4654 00004FC1 742C                <1> 	jz	short A4
  4655 00004FC3 80FC0D              <1> 	cmp	ah, 0Dh	; Alternate reset
  4656 00004FC6 7504                <1> 	jne	short A2
  4657 00004FC8 28E4                <1> 	sub	ah, ah	; Reset
  4658 00004FCA EB23                <1> 	jmp	short A4
  4659                              <1> A2:
  4660                              <1> 	; 13/07/2022
  4661 00004FCC 80FC08              <1> 	cmp	ah, 08h			; GET PARAMETERS IS A SPECIAL CASE
  4662 00004FCF 7505                <1> 	jne	short A3
  4663 00004FD1 E9AC030000          <1>         jmp	GET_PARM_N
  4664                              <1> A3:	
  4665                              <1> 	; 13/07/2022
  4666 00004FD6 80FC15              <1> 	cmp	ah, 15h			; READ DASD TYPE IS ALSO
  4667 00004FD9 7514                <1> 	jne	short A4
  4668 00004FDB E947030000          <1>         jmp	READ_DASD_TYPE	; Return Drive Type
  4669                              <1> 				; (Programmer's guide to AMIBIOS, 1992)
  4670                              <1> 	; 13/07/2022
  4671                              <1> int33h_bad_cmd:
  4672                              <1> 	; 16/05/2016
  4673                              <1> 	; 30/01/2015
  4674                              <1> 	; 29/05/2016
  4675                              <1> 	;push	ds
  4676                              <1> 	;push	eax
  4677                              <1> 	;mov	ax, KDATA
  4678                              <1> 	;mov	ds, ax
  4679                              <1> 	;pop	eax
  4680                              <1> 
  4681 00004FE0 B401                <1> 	mov	ah, BAD_CMD
  4682 00004FE2 8825[DF770100]      <1> 	mov     [DISK_STATUS1], ah ; BAD_CMD  ; COMMAND ERROR
  4683                              <1>         ;jmp	short RET_2
  4684                              <1> 	; 13/07/2022
  4685                              <1> ;RET_2:
  4686                              <1> 	; (*) 29/05/2016
  4687                              <1> 	; (*) retf 4
  4688                              <1> 	;or	byte [esp+8], 1 ; set carry bit of eflags register
  4689                              <1> 	;iretd
  4690                              <1> 	
  4691                              <1> 	; 13/07/2022
  4692 00004FE8 F9                  <1> 	stc
  4693                              <1> 	; cf = 1, ah = BAD_CMD
  4694 00004FE9 C3                  <1> 	retn
  4695                              <1> _A4:
  4696                              <1> 	; 13/07/2022
  4697                              <1> 	; 02/02/2015
  4698 00004FEA 80FC1D              <1> 	cmp	ah, 1Dh			; (Temporary for Retro UNIX 386 v1)
  4699                              <1> 	; 12/01/2015
  4700                              <1> 	;cmc
  4701                              <1> 	;jnc	short A4
  4702                              <1> 	; 13/07/2022
  4703 00004FED 73F1                <1> 	jnb	short int33h_bad_cmd	
  4704                              <1> A4:					; SAVE REGISTERS DURING OPERATION
  4705 00004FEF C8080000            <1> 	enter	8, 0			; SAVE (BP) AND MAKE ROOM FOR @CMD_BLOCK
  4706                              <1> 	
  4707                              <1> 	; 13/07/2022
  4708                              <1> 	; ENTER 8, 0
  4709                              <1> 	;;push	ebp
  4710                              <1> 	;;mov	ebp, esp
  4711                              <1> 	;;sub	esp, 8
  4712                              <1> 	;
  4713                              <1> 	;push	ebx			;  IN THE STACK, THE COMMAND BLOCK IS:
  4714                              <1> 	;push	ecx			;   @CMD_BLOCK == BYTE PTR [BP]-8
  4715                              <1> 	;push	edx
  4716                              <1> 	;push	esi
  4717                              <1> 	;push	edi
  4718                              <1> 
  4719                              <1> 	; 13/07/2022
  4720                              <1> 	; edi = ebp+8
  4721                              <1> 	; esi = ebp+12
  4722                              <1> 	; edx = ebp+16
  4723                              <1> 	; ecx = ebp+20
  4724                              <1> 	; ebx = ebp+24
  4725                              <1> 
  4726                              <1> 	;;04/01/2015
  4727                              <1> 	;;or	ah, ah			; CHECK FOR RESET
  4728                              <1> 	;;jnz	short A5
  4729                              <1> 	;;mov	dl, 80h			; FORCE DRIVE 80 FOR RESET
  4730                              <1> ;;A5:	
  4731                              <1> 	; 13/07/2022
  4732 00004FF3 E880000000          <1> 	call	DISK_IO_CONT		; PERFORM THE OPERATION
  4733                              <1> 	;;call	DDS			; ESTABLISH SEGMENT
  4734 00004FF8 8A25[DF770100]      <1> 	mov	ah, [DISK_STATUS1]	; GET STATUS FROM OPERATION
  4735                              <1> 	;(*) cmp ah, 1			; SET THE CARRY FLAG TO INDICATE
  4736                              <1> 					; SUCCESS OR FAILURE
  4737                              <1> 	;pop	edi			; RESTORE REGISTERS
  4738                              <1> 	;pop	esi
  4739                              <1> 	;pop	edx
  4740                              <1> 	;pop	ecx
  4741                              <1> 	;pop	ebx
  4742                              <1> 	
  4743 00004FFE C9                  <1> 	leave				; ADJUST (SP) AND RESTORE (BP)
  4744                              <1> 	
  4745                              <1> 	;retf	2			; THROW AWAY SAVED FLAGS
  4746                              <1> 	; (*) 29/05/2016
  4747                              <1> 	; (*) retf 4
  4748                              <1> 	
  4749                              <1> 	; 13/07/2022
  4750 00004FFF 80FC01              <1> 	cmp	ah, 1
  4751                              <1> 	;jc	short _A5 
  4752                              <1> 	;or	byte [esp+8], 1 ; set carry bit of eflags register
  4753                              <1> ;_A5:
  4754                              <1> 	;iretd
  4755                              <1> 	; 10/08/2022
  4756 00005002 F5                  <1> 	cmc
  4757                              <1> 	; 13/07/2022
  4758 00005003 C3                  <1> 	retn
  4759                              <1> 
  4760                              <1> ; 21/02/2015
  4761                              <1> ;       dw --> dd
  4762                              <1> 	; 13/07/2022
  4763                              <1> D1:					; FUNCTION TRANSFER TABLE
  4764 00005004 [BC510000]          <1> 	dd	DISK_RESET		; 00h
  4765 00005008 [1C520000]          <1> 	dd	RETURN_STATUS		; 01h
  4766 0000500C [2F520000]          <1> 	dd	DISK_READ		; 02h
  4767 00005010 [8B520000]          <1> 	dd	DISK_WRITE		; 03h
  4768 00005014 [0F530000]          <1> 	dd	DISK_VERF		; 04h
  4769 00005018 [FC520000]          <1> 	dd	FMT_TRK 		; 05h
  4770 0000501C [B2510000]          <1> 	dd	BAD_COMMAND		; 06h	FORMAT BAD SECTORS
  4771 00005020 [B2510000]          <1> 	dd	BAD_COMMAND		; 07h	FORMAT DRIVE
  4772 00005024 [B2510000]          <1> 	dd	BAD_COMMAND		; 08h	RETURN PARAMETERS
  4773 00005028 [02540000]          <1> 	dd	INIT_DRV		; 09h
  4774 0000502C [29520000]          <1> 	dd	RD_LONG 		; 0Ah
  4775 00005030 [85520000]          <1> 	dd	WR_LONG 		; 0Bh
  4776 00005034 [73540000]          <1> 	dd	DISK_SEEK		; 0Ch
  4777 00005038 [BC510000]          <1> 	dd	DISK_RESET		; 0Dh
  4778 0000503C [B2510000]          <1> 	dd	BAD_COMMAND		; 0Eh	READ BUFFER
  4779 00005040 [B2510000]          <1> 	dd	BAD_COMMAND		; 0Fh	WRITE BUFFER
  4780 00005044 [9B540000]          <1> 	dd	TST_RDY 		; 10h
  4781 00005048 [BF540000]          <1> 	dd	HDISK_RECAL		; 11h
  4782 0000504C [B2510000]          <1> 	dd	BAD_COMMAND		; 12h	MEMORY DIAGNOSTIC
  4783 00005050 [B2510000]          <1> 	dd	BAD_COMMAND		; 13h	DRIVE DIAGNOSTIC
  4784 00005054 [F5540000]          <1> 	dd	CTLR_DIAGNOSTIC 	; 14h	CONTROLLER DIAGNOSTIC
  4785                              <1> 	;; 02/02/2015 (Temporary - Retro UNIX 386 v1 - DISK I/O test)
  4786 00005058 [B2510000]          <1> 	dd	BAD_COMMAND		; 15h
  4787 0000505C [B2510000]          <1> 	dd	BAD_COMMAND		; 16h
  4788 00005060 [B2510000]          <1> 	dd	BAD_COMMAND		; 17h
  4789 00005064 [B2510000]          <1> 	dd	BAD_COMMAND		; 18h
  4790 00005068 [B2510000]          <1> 	dd	BAD_COMMAND		; 19h
  4791 0000506C [B2510000]          <1> 	dd	BAD_COMMAND		; 1Ah
  4792 00005070 [2F520000]          <1> 	dd	DISK_READ		; 1Bh ; LBA read
  4793 00005074 [8B520000]          <1> 	dd	DISK_WRITE		; 1Ch ; LBA write
  4794                              <1> D1L     EQU    $ - D1
  4795                              <1> 
  4796                              <1> 	; 07/08/2022
  4797                              <1> 	; 17/07/2022 - TRDOS 386 v2.0.5
  4798                              <1> DISK_IO_CONT:
  4799                              <1> 	;;call	DDS			; ESTABLISH SEGMENT
  4800                              <1> 	; 11/04/2021
  4801 00005078 80FC01              <1> 	cmp	ah, 01h			; RETURN STATUS
  4802 0000507B 7505                <1> 	jne	short SU0
  4803 0000507D E99A010000          <1> 	jmp	RETURN_STATUS
  4804                              <1> SU0:
  4805 00005082 C605[DF770100]00    <1> 	mov	byte [DISK_STATUS1], 0 	; RESET THE STATUS INDICATOR
  4806                              <1> 	; 13/07/2022
  4807 00005089 89DE                <1> 	mov	esi, ebx ; 21/02/2015	; SAVE DATA ADDRESS
  4808 0000508B 8A1D[E0770100]      <1> 	mov	bl, [HF_NUM]		; GET NUMBER OF DRIVES
  4809 00005091 80E27F              <1> 	and	dl, 7Fh			; GET DRIVE AS 0 OR 1
  4810                              <1> 					; (get drive number as 0 to 3)
  4811                              <1> 	; 14/02/2015 
  4812 00005094 38D3                <1> 	cmp	bl, dl
  4813                              <1> 	;jbe	short BAD_COMMAND	; INVALID DRIVE
  4814                              <1> 	; 07/08/2022
  4815 00005096 7705                <1> 	ja	short SU0X
  4816 00005098 E915010000          <1> 	jmp	BAD_COMMAND
  4817                              <1> SU0X:
  4818                              <1> 	;;03/01/2015
  4819 0000509D 29DB                <1> 	sub	ebx, ebx
  4820 0000509F 88D3                <1> 	mov	bl, dl
  4821 000050A1 883D[F4770100]      <1> 	mov	[LBAMode], bh 	; 0
  4822                              <1> 	
  4823                              <1> 	;test	byte [ebx+hd0_type], 1 	; LBA ready ?
  4824                              <1> 	;jz	short su1		; no
  4825                              <1> 	;inc	byte [LBAMode]
  4826                              <1> ;su1:
  4827                              <1> 	; 11/04/2021 (32 bit push/pop)
  4828                              <1> 	; 21/02/2015 (32 bit modification)
  4829                              <1> 	; 04/01/2015
  4830 000050A7 50                  <1> 	push	eax ; ***
  4831                              <1> 	;push	es  ; **
  4832 000050A8 52                  <1> 	push	edx ; *
  4833 000050A9 50                  <1> 	push	eax ; ****
  4834 000050AA E8ED050000          <1> 	call	GET_VEC 		; GET DISK PARAMETERS
  4835                              <1> 	; 02/02/2015
  4836                              <1> 	;mov	ax, [ES:BX+16] ; I/O port base address (1F0h, 170h)
  4837 000050AF 668B4310            <1> 	mov	ax, [ebx+16]
  4838 000050B3 66A3[6E650000]      <1> 	mov	[HF_PORT], ax
  4839                              <1> 	;mov	dx, [ES:BX+18] ; control port address (3F6h, 376h)
  4840 000050B9 668B5312            <1> 	mov	dx, [ebx+18]
  4841 000050BD 668915[70650000]    <1> 	mov	[HF_REG_PORT], dx
  4842                              <1> 	;mov	al, [ES:BX+20] ; head register upper nibble (A0h,B0h,E0h,F0h)
  4843 000050C4 8A4314              <1> 	mov	al, [ebx+20]
  4844                              <1> 	; 23/02/2015
  4845 000050C7 A840                <1> 	test	al, 40h	 ; LBA bit (bit 6)
  4846 000050C9 7406                <1> 	jz 	short su1
  4847 000050CB FE05[F4770100]      <1> 	inc	byte [LBAMode] ; 1 
  4848                              <1> su1: 	 
  4849 000050D1 C0E804              <1> 	shr 	al, 4
  4850 000050D4 2401                <1> 	and	al, 1			
  4851 000050D6 A2[72650000]        <1> 	mov	[hf_m_s], al 
  4852                              <1> 	;
  4853                              <1> 	; 03/01/2015
  4854                              <1> 	;mov	al, [ES:BX+8]		; GET CONTROL BYTE MODIFIER
  4855 000050DB 8A4308              <1> 	mov	al, [ebx+8]
  4856                              <1> 	;mov	dx, [HF_REG_PORT]	; Device Control register
  4857 000050DE EE                  <1> 	out	dx, al			; SET EXTRA HEAD OPTION
  4858                              <1> 					; -here-
  4859                              <1> 					; Control Byte: (= 08h)
  4860                              <1> 					;  bit 0 - 0
  4861                              <1> 					;  bit 1 - nIEN (1 = disable irq)
  4862                              <1> 					;  bit 2 - SRST (software RESET)
  4863                              <1> 					;  bit 3 - use extra heads (8 to 15)
  4864                              <1> 					;          -always set to 1-	
  4865                              <1> 					;  (bits 3 to 7 are reserved
  4866                              <1> 					;          for ATA devices)
  4867 000050DF 8A25[E1770100]      <1> 	mov	ah, [CONTROL_BYTE]	; SET EXTRA HEAD OPTION IN
  4868 000050E5 80E4C0              <1> 	and	ah, 0C0h 		; CONTROL BYTE
  4869 000050E8 08C4                <1> 	or	ah, al
  4870 000050EA 8825[E1770100]      <1> 	mov	[CONTROL_BYTE], ah
  4871                              <1> 	
  4872                              <1> 	; 11/04/2021 (32 bit push/pop)
  4873                              <1> 	; 04/01/2015
  4874 000050F0 58                  <1> 	pop	eax ; ****
  4875 000050F1 5A                  <1> 	pop	edx ; * ; 14/02/2015
  4876 000050F2 20E4                <1> 	and	ah, ah	; Reset function ?
  4877 000050F4 7506                <1> 	jnz	short su2
  4878                              <1> 	;pop	es ; **
  4879 000050F6 58                  <1> 	pop	eax ; ***
  4880 000050F7 E9C0000000          <1>         jmp     DISK_RESET
  4881                              <1> su2:
  4882 000050FC 803D[F4770100]00    <1> 	cmp	byte [LBAMode], 0
  4883 00005103 765F                <1> 	jna	short su3
  4884                              <1> 	;
  4885                              <1> 	; 02/02/2015 (LBA read/write function calls)
  4886 00005105 80FC1B              <1> 	cmp	ah, 1Bh
  4887 00005108 720B                <1> 	jb	short lbarw1
  4888 0000510A 80FC1C              <1> 	cmp	ah, 1Ch
  4889 0000510D 775A                <1> 	ja 	short invldfnc
  4890                              <1> 	;;pop	edx ; * ; 14/02/2015
  4891                              <1> 	;mov	ax, cx ; Lower word of LBA address (bits 0-15)
  4892 0000510F 89C8                <1> 	mov	eax, ecx ; LBA address (21/02/2015)
  4893                              <1> 	; 13/07/2022
  4894 00005111 88D1                <1> 	mov	cl, dl ; 14/02/2015
  4895 00005113 EB2F                <1> 	jmp	short lbarw2
  4896                              <1> 
  4897                              <1> lbarw1:
  4898                              <1> 	; convert CHS to LBA
  4899                              <1> 	;
  4900                              <1> 	; LBA calculation - AWARD BIOS - 1999 - AHDSK.ASM
  4901                              <1> 	; LBA = "# of Heads" * Sectors/Track * Cylinder + Head * Sectors/Track
  4902                              <1> 	;	+ Sector - 1
  4903                              <1> 	; 11/04/2021 (32 bit push/pop)
  4904 00005115 52                  <1> 	push	edx ; * ;; 14/02/2015
  4905                              <1> 	;xor	dh, dh
  4906 00005116 31D2                <1> 	xor	edx, edx
  4907                              <1> 	;mov	dl, [ES:BX+14]	; sectors per track (logical)
  4908 00005118 8A530E              <1> 	mov	dl, [ebx+14]
  4909                              <1> 	;xor	ah, ah
  4910 0000511B 31C0                <1> 	xor	eax, eax
  4911                              <1> 	;mov	al, [ES:BX+2]	; heads (logical) 	
  4912 0000511D 8A4302              <1> 	mov	al, [ebx+2]
  4913 00005120 FEC8                <1> 	dec	al
  4914 00005122 6640                <1> 	inc	ax		; 0 = 256
  4915 00005124 66F7E2              <1> 	mul 	dx
  4916                              <1> 		; AX = # of Heads * Sectors/Track
  4917 00005127 6689CA              <1> 	mov	dx, cx
  4918                              <1> 	;and	cx, 3Fh	 ; sector  (1 to 63)
  4919 0000512A 83E13F              <1> 	and	ecx, 3Fh
  4920 0000512D 86D6                <1> 	xchg	dl, dh
  4921 0000512F C0EE06              <1> 	shr	dh, 6
  4922                              <1> 		; DX = cylinder (0 to 1023)
  4923                              <1> 	;mul 	dx
  4924                              <1> 		; DX:AX = # of Heads" * Sectors/Track * Cylinder
  4925 00005132 F7E2                <1> 	mul	edx
  4926 00005134 FEC9                <1> 	dec	cl ; sector - 1
  4927                              <1> 	;add	ax, cx
  4928                              <1> 	;adc	dx, 0
  4929                              <1> 		; DX:AX = # of Heads" * Sectors/Track * Cylinder + Sector - 1
  4930 00005136 01C8                <1> 	add	eax, ecx
  4931                              <1> 	; 11/04/2021 (32 bit push/pop)
  4932 00005138 59                  <1> 	pop	ecx ; * ; ch = head, cl = drive number (zero based)
  4933                              <1> 	;push	dx
  4934                              <1> 	;push	ax
  4935 00005139 50                  <1> 	push	eax
  4936                              <1> 	; 13/07/2022
  4937 0000513A 29C0                <1> 	sub	eax, eax
  4938                              <1> 	;mov	al, [ES:BX+14]	; sectors per track (logical)	
  4939 0000513C 8A430E              <1> 	mov	al, [ebx+14]
  4940 0000513F F6E5                <1> 	mul	ch
  4941                              <1> 		; AX = Head * Sectors/Track
  4942                              <1>         ; 13/07/2022
  4943                              <1> 	;movzx	eax, ax ; 09/12/2017
  4944                              <1> 	;pop	dx
  4945 00005141 5A                  <1> 	pop	edx
  4946                              <1> 	;add	ax, dx
  4947                              <1> 	;pop	dx
  4948                              <1> 	;adc	dx, 0 ; add carry bit
  4949 00005142 01D0                <1> 	add	eax, edx
  4950                              <1> lbarw2:
  4951 00005144 29D2                <1> 	sub	edx, edx ; 21/02/2015
  4952 00005146 88CA                <1> 	mov	dl, cl ; 21/02/2015
  4953 00005148 C645F800            <1>         mov     byte [CMD_BLOCK], 0 ; Features Register
  4954                              <1> 				; NOTE: Features register (1F1h, 171h)
  4955                              <1> 				; is not used for ATA device R/W functions. 
  4956                              <1> 				; It is old/obsolete 'write precompensation'
  4957                              <1> 				; register and error register
  4958                              <1> 				; for old ATA/IDE devices.
  4959                              <1> 	; 18/01/2014
  4960                              <1> 	;mov	ch, [hf_m_s]	; Drive 0 (master) or 1 (slave)
  4961 0000514C 8A0D[72650000]      <1> 	mov	cl, [hf_m_s]
  4962                              <1> 	;shl	ch, 4		; bit 4 (drive bit)
  4963                              <1> 	;or	ch, 0E0h	; bit 5 = 1
  4964                              <1> 				; bit 6 = 1 = LBA mode
  4965                              <1> 				; bit 7 = 1
  4966 00005152 80C90E              <1> 	or	cl, 0Eh ; 1110b
  4967                              <1> 	;and	dh, 0Fh		; LBA byte 4 (bits 24 to 27)
  4968 00005155 25FFFFFF0F          <1> 	and	eax, 0FFFFFFFh
  4969 0000515A C1E11C              <1> 	shl	ecx, 28 ; 21/02/2015
  4970                              <1> 	;or	dh, ch
  4971 0000515D 09C8                <1> 	or	eax, ecx	
  4972                              <1> 	;;mov	[CMD_BLOCK+2], al ; LBA byte 1 (bits 0 to 7)
  4973                              <1> 				  ; (Sector Number Register)
  4974                              <1> 	;;mov	[CMD_BLOCK+3], ah ; LBA byte 2 (bits 8 to 15)
  4975                              <1> 				  ; (Cylinder Low Register)
  4976                              <1> 	;mov	[CMD_BLOCK+2], ax ; LBA byte 1, 2
  4977                              <1> 	;mov	[CMD_BLOCK+4], dl ; LBA byte 3 (bits 16 to 23)
  4978                              <1> 				  ; (Cylinder High Register)
  4979                              <1> 	;;mov	[CMD_BLOCK+5], dh ; LBA byte 4 (bits 24 to 27)
  4980                              <1> 				  ; (Drive/Head Register)
  4981                              <1> 	
  4982                              <1> 	;mov	[CMD_BLOCK+4], dx ; LBA byte 4, LBA & DEV select bits
  4983 0000515F 8945FA              <1> 	mov	[CMD_BLOCK+2], eax ; 21/02/2015
  4984                              <1> 	; 14/02/2015
  4985                              <1> 	;mov	dl, cl ; Drive number (INIT_DRV)		
  4986 00005162 EB36                <1> 	jmp	short su4
  4987                              <1> su3:
  4988                              <1> 	; 07/08/2022
  4989                              <1> 	; 13/07/2022
  4990                              <1> 	; 02/02/2015 
  4991                              <1> 	; (1Bh & 1Ch functions are not valid for CHS mode) 
  4992 00005164 80FC14              <1> 	cmp 	ah, 14h
  4993 00005167 7603                <1> 	jna 	short chsfnc
  4994                              <1> invldfnc:
  4995                              <1>         ; 14/02/2015  
  4996                              <1> 	;pop	es ; **
  4997                              <1> 	; 11/04/2021
  4998 00005169 58                  <1> 	pop	eax ; *** 
  4999 0000516A EB46                <1>         jmp     short BAD_COMMAND
  5000                              <1> chsfnc:	
  5001                              <1> 	;mov	ax, [ES:BX+5]		; GET WRITE PRE-COMPENSATION CYLINDER
  5002 0000516C 668B4305            <1> 	mov	ax, [ebx+5]
  5003                              <1> 	;shr	ax, 2
  5004                              <1> 	; 07/08/2022
  5005 00005170 C1E802              <1> 	shr	eax, 2
  5006 00005173 8845F8              <1> 	mov	[CMD_BLOCK], al
  5007                              <1> 	
  5008                              <1> 	;;mov	al, [ES:BX+8]		; GET CONTROL BYTE MODIFIER
  5009                              <1> 	;;push	edx ; *
  5010                              <1> 	;;mov	dx, [HF_REG_PORT]
  5011                              <1> 	;;out	dx, al			; SET EXTRA HEAD OPTION
  5012                              <1> 	;;pop	edx ; * 
  5013                              <1> 	;;pop	es  ; **
  5014                              <1> 	;;mov	ah, [CONTROL_BYTE]	; SET EXTRA HEAD OPTION IN
  5015                              <1> 	;;and	ah, 0C0h 		; CONTROL BYTE	
  5016                              <1> 	;;or	ah, al
  5017                              <1> 	;;mov	[CONTROL_BYTE], ah
  5018                              <1> 	
  5019 00005176 88C8                <1> 	mov	al, cl			; GET SECTOR NUMBER
  5020 00005178 243F                <1> 	and	al, 3Fh
  5021 0000517A 8845FA              <1> 	mov	[CMD_BLOCK+2], al
  5022 0000517D 886DFB              <1> 	mov	[CMD_BLOCK+3], ch 	; GET CYLINDER NUMBER
  5023 00005180 88C8                <1> 	mov	al, cl
  5024 00005182 C0E806              <1> 	shr	al, 6
  5025 00005185 8845FC              <1> 	mov	[CMD_BLOCK+4], al 	; CYLINDER HIGH ORDER 2 BITS
  5026                              <1> 	
  5027                              <1> 	;;05/01/2015
  5028                              <1> 	;;mov	al, dl			; DRIVE NUMBER
  5029 00005188 A0[72650000]        <1> 	mov	al, [hf_m_s]
  5030 0000518D C0E004              <1> 	shl	al, 4
  5031 00005190 80E60F              <1> 	and	dh, 0Fh			; HEAD NUMBER
  5032 00005193 08F0                <1> 	or	al, dh
  5033                              <1> 	;or	al, 80h or 20h
  5034 00005195 0CA0                <1> 	or	al, 80h+20h		; ECC AND 512 BYTE SECTORS
  5035 00005197 8845FD              <1> 	mov	[CMD_BLOCK+5], al 	; ECC/SIZE/DRIVE/HEAD
  5036                              <1> su4:
  5037                              <1> 	;pop	es ; **
  5038                              <1>         ;; 14/02/2015
  5039                              <1>         ;;pop	ax
  5040                              <1>         ;;mov	[CMD_BLOCK+1], al	; SECTOR COUNT
  5041                              <1>         ;;push	ax
  5042                              <1>         ;;mov	al, ah			; GET INTO LOW BYTE
  5043                              <1>         ;;xor	ah, ah			; ZERO HIGH BYTE
  5044                              <1>         ;;sal	ax, 1			; *2 FOR TABLE LOOKUP
  5045                              <1>         ; 11/04/2021
  5046 0000519A 58                  <1> 	pop	eax ; *** 
  5047 0000519B 8845F9              <1>         mov     [CMD_BLOCK+1], al
  5048 0000519E 29DB                <1>         sub	ebx, ebx
  5049                              <1> 	;xor	bh, bh
  5050 000051A0 88E3                <1> 	mov     bl, ah
  5051                              <1>         ;sal	bx, 1
  5052                              <1>         ; 17/07/2022
  5053 000051A2 C1E302              <1> 	sal	ebx, 2	; 32 bit offset (21/02/2015)
  5054                              <1> 	;mov	si, ax			; PUT INTO SI FOR BRANCH
  5055                              <1>         ; 13/07/2022
  5056                              <1> 	;cmp	bx, D1L			; TEST WITHIN RANGE
  5057                              <1> 	;jnb	short BAD_COMMAND_POP
  5058 000051A5 83FB74              <1> 	cmp	ebx, D1L		; TEST WITHIN RANGE
  5059 000051A8 7308                <1> 	jnb	short BAD_COMMAND
  5060                              <1>         ;xchg	bx, si
  5061 000051AA 87DE                <1>         xchg	ebx, esi
  5062                              <1> 	;;;pop	ax			; RESTORE AX
  5063                              <1> 	;;;pop	bx			; AND DATA ADDRESS
  5064                              <1> 	
  5065                              <1> 	;;push	cx
  5066                              <1> 	;;push	ax			; ADJUST ES:BX
  5067                              <1> 	;mov	cx, bx			; GET 3 HIGH ORDER NIBBLES OF BX
  5068                              <1> 	;shr	cx, 4
  5069                              <1> 	;mov	ax, es
  5070                              <1> 	;add	ax, cx
  5071                              <1> 	;mov	es, ax
  5072                              <1> 	;and	bx, 000Fh		; ES:BX CHANGED TO ES:000X
  5073                              <1> 	;;pop	ax
  5074                              <1> 	;;pop	cx
  5075                              <1> 	;;jmp	word [CS:SI+D1]
  5076                              <1> 	;jmp	word [SI+D1]
  5077                              <1> 	
  5078 000051AC FFA6[04500000]      <1> 	jmp	dword [esi+D1]
  5079                              <1> 
  5080                              <1> 	; 07/08/2022
  5081                              <1> 	; 13/07/2022
  5082                              <1> BAD_COMMAND:
  5083 000051B2 C605[DF770100]01    <1>         mov	byte [DISK_STATUS1], BAD_CMD ; COMMAND ERROR
  5084 000051B9 B000                <1> 	mov	al, 0
  5085 000051BB C3                  <1> 	retn
  5086                              <1> 
  5087                              <1> ; 09/08/2022
  5088                              <1> ; 07/08/2022
  5089                              <1> ; 17/07/2022
  5090                              <1> ; 16/07/2022 - TRDOS 386 v2.0.5
  5091                              <1> ; 10/07/2022 - Retro UNIX 386 v1.1 (Kernel v0.2.1.5)
  5092                              <1> 
  5093                              <1> ;----------------------------------------
  5094                              <1> ;	RESET THE DISK SYSTEM  (AH=00H) :
  5095                              <1> ;----------------------------------------
  5096                              <1> 
  5097                              <1> ; 18-1-2015 : one controller reset (not other one)
  5098                              <1> 
  5099                              <1> DISK_RESET:
  5100 000051BC FA                  <1> 	cli
  5101 000051BD E4A1                <1> 	in	al, INTB01		; GET THE MASK REGISTER
  5102                              <1> 	;jmp	$+2
  5103                              <1> 	IODELAY
    78 000051BF EB00                <2>  jmp short $+2
    79 000051C1 EB00                <2>  jmp short $+2
  5104                              <1> 	;and	al, 0BFh 		; ENABLE FIXED DISK INTERRUPT
  5105 000051C3 243F                <1> 	and	al, 3Fh			; 22/12/2014 (IRQ 14 & IRQ 15)
  5106 000051C5 E6A1                <1> 	out	INTB01, al
  5107 000051C7 FB                  <1> 	sti				; START INTERRUPTS
  5108                              <1> 	; 14/02/2015
  5109                              <1> 	;mov	di, dx
  5110                              <1> 	; 24/12/2021
  5111 000051C8 89D7                <1> 	mov	edi, edx	
  5112                              <1> 	; 04/01/2015
  5113                              <1> 	;xor	di,di
  5114                              <1> drst0:
  5115 000051CA B004                <1> 	mov	al, 04h  ; bit 2 - SRST 
  5116                              <1> 	;mov	dx, HF_REG_PORT
  5117 000051CC 668B15[70650000]    <1> 	mov	dx, [HF_REG_PORT]
  5118 000051D3 EE                  <1> 	out	dx, al			; RESET
  5119                              <1> ;	mov	cx, 10			; DELAY COUNT
  5120                              <1> ;DRD:	dec	cx
  5121                              <1> ;	jnz	short DRD		; WAIT 4.8 MICRO-SEC
  5122                              <1> 	;mov	cx, 2			; wait for 30 micro seconds	
  5123                              <1>         ;mov	ecx, 2 ; 21/02/2015
  5124                              <1> 	; 10/07/2022
  5125 000051D4 29C9                <1> 	sub	ecx, ecx
  5126 000051D6 B102                <1> 	mov	cl, 2
  5127 000051D8 E8DAD1FFFF          <1> 	call    WAITF                   ; (Award Bios 1999 - WAIT_REFRESH,
  5128                              <1>                                         ; 40 micro seconds)
  5129 000051DD A0[E1770100]        <1> 	mov	al, [CONTROL_BYTE]
  5130 000051E2 240F                <1> 	and	al, 0Fh			; SET HEAD OPTION
  5131 000051E4 EE                  <1> 	out	dx, al			; TURN RESET OFF
  5132 000051E5 E8FD030000          <1> 	call	NOT_BUSY
  5133 000051EA 7514                <1> 	jnz	short DRERR		; TIME OUT ON RESET
  5134 000051EC 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]
  5135 000051F3 FEC2                <1> 	inc	dl  ; HF_PORT+1
  5136                              <1> 	; 02/01/2015 - Award BIOS 1999 - AHDSK.ASM
  5137                              <1>         ;mov	cl, 10
  5138                              <1>         ;mov	ecx, 10 ; 21/02/2015
  5139                              <1> 	; 17/07/2022
  5140                              <1> 	;xor	ecx, ecx
  5141 000051F5 B10A                <1> 	mov	cl, 10
  5142                              <1> drst1:
  5143 000051F7 EC                  <1> 	in	al, dx			; GET RESET STATUS
  5144 000051F8 3C01                <1> 	cmp	al, 1
  5145                              <1> 	; 04/01/2015
  5146 000051FA 740C                <1> 	jz	short drst2
  5147                              <1> 	;jnz	short DRERR		; BAD RESET STATUS
  5148                              <1>         	; Drive/Head Register - bit 4
  5149                              <1> 	;loop	drst1
  5150                              <1> 	; 17/07/2022
  5151 000051FC FEC9                <1> 	dec	cl
  5152 000051FE 75F7                <1> 	jnz	short drst1
  5153                              <1> DRERR:	
  5154 00005200 C605[DF770100]05    <1> 	mov	byte [DISK_STATUS1], BAD_RESET ; CARD FAILED
  5155 00005207 C3                  <1> 	retn
  5156                              <1> drst2:
  5157                              <1> 	; 14/02/2015
  5158                              <1> 	;mov	dx, di
  5159                              <1> 	; 07/08/2022
  5160 00005208 89FA                <1> 	mov	edx, edi
  5161                              <1> ;drst3:
  5162                              <1> ;	; 05/01/2015
  5163                              <1> ;	shl 	di, 1
  5164                              <1> ;	; 04/01/2015
  5165                              <1> ;	mov	ax, [di+hd_cports]
  5166                              <1> ;	cmp	ax, [HF_REG_PORT]
  5167                              <1> ;	je	short drst4
  5168                              <1> ;	mov	[HF_REG_PORT], ax
  5169                              <1> ;	; 03/01/2015
  5170                              <1> ;	mov	ax, [di+hd_ports]
  5171                              <1> ;       mov     [HF_PORT], ax
  5172                              <1> ;	; 05/01/2014
  5173                              <1> ;	shr	di, 1
  5174                              <1> ;	; 04/01/2015
  5175                              <1> ;	jmp	short drst0	; reset other controller
  5176                              <1> ;drst4:
  5177                              <1> ;	; 05/01/2015
  5178                              <1> ;	shr	di, 1
  5179                              <1> ;	mov	al, [di+hd_dregs]
  5180                              <1> ;	and	al, 10h ; bit 4 only
  5181                              <1> ;	shr	al, 4 ; bit 4  -> bit 0
  5182                              <1> ;	mov	[hf_m_s], al ; (0 = master, 1 = slave)
  5183                              <1> 	;
  5184                              <1> ; 09/08/2022
  5185                              <1> ; (('INIT_DRV' prodedure sets [CMD_BLOCKS+5] value))
  5186                              <1> ;
  5187                              <1> ;	mov	al, [hf_m_s] ; 18/01/2015
  5188                              <1> ;	test	al, 1
  5189                              <1> ;	;jnz	short drst6
  5190                              <1> ;       jnz     short drst4
  5191                              <1> ;	and	byte [CMD_BLOCK+5], 0EFh ; SET TO DRIVE 0
  5192                              <1> ;drst5:
  5193                              <1> drst3:
  5194 0000520A E8F3010000          <1> 	call	INIT_DRV		; SET MAX HEADS
  5195                              <1> 	;mov	dx, di
  5196 0000520F E8AB020000          <1> 	call	HDISK_RECAL		; RECAL TO RESET SEEK SPEED
  5197                              <1> 	; 04/01/2014
  5198                              <1> ;	inc	di
  5199                              <1> ;	mov	dx, di
  5200                              <1> ;	cmp	dl, [HF_NUM]
  5201                              <1> ;	jb	short drst3
  5202                              <1> ;DRE:
  5203 00005214 C605[DF770100]00    <1> 	mov	byte [DISK_STATUS1], 0 	; IGNORE ANY SET UP ERRORS
  5204 0000521B C3                  <1> 	retn
  5205                              <1> ;drst6:
  5206                              <1> drst4:		; Drive/Head Register - bit 4
  5207                              <1> ;	or	byte [CMD_BLOCK+5], 010h ; SET TO DRIVE 1
  5208                              <1> ;       ;jmp    short drst5
  5209                              <1> ;       jmp     short drst3
  5210                              <1> 
  5211                              <1> ;----------------------------------------
  5212                              <1> ;	DISK STATUS ROUTINE  (AH = 01H) :
  5213                              <1> ;----------------------------------------
  5214                              <1> 
  5215                              <1> RETURN_STATUS:
  5216 0000521C A0[DF770100]        <1> 	mov	al, [DISK_STATUS1]	; OBTAIN PREVIOUS STATUS
  5217 00005221 C605[DF770100]00    <1> 	mov	byte [DISK_STATUS1], 0	; RESET STATUS
  5218 00005228 C3                  <1> 	retn
  5219                              <1> 
  5220                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  5221                              <1> 
  5222                              <1> ;----------------------------------------
  5223                              <1> ;	READ LONG	     (AH = 0AH) :
  5224                              <1> ;----------------------------------------
  5225                              <1> 
  5226                              <1> RD_LONG:
  5227                              <1> 	;mov	@CMD_BLOCK+6, READ_CMD OR ECC_MODE
  5228 00005229 C645FE22            <1> 	mov     byte [CMD_BLOCK+6], READ_CMD + ECC_MODE 
  5229 0000522D EB04                <1> 	jmp	short COMMANDI
  5230                              <1> 
  5231                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  5232                              <1> 
  5233                              <1> ;----------------------------------------
  5234                              <1> ;	DISK READ ROUTINE    (AH = 02H) :
  5235                              <1> ;----------------------------------------
  5236                              <1> 
  5237                              <1> DISK_READ:
  5238 0000522F C645FE20            <1> 	mov	byte [CMD_BLOCK+6], READ_CMD
  5239                              <1>         ;jmp	COMMANDI
  5240                              <1> 
  5241                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  5242                              <1> 
  5243                              <1> ;----------------------------------------
  5244                              <1> ; COMMANDI				:
  5245                              <1> ;	REPEATEDLY INPUTS DATA TILL	:
  5246                              <1> ;	NSECTOR RETURNS ZERO		:
  5247                              <1> ;----------------------------------------
  5248                              <1> COMMANDI:
  5249                              <1> 	; 16/07/2022 
  5250                              <1> 	;	(check 64K boundary is not needed)
  5251                              <1> 	;call	CHECK_DMA		; CHECK 64K BOUNDARY ERROR
  5252                              <1> 	;jc	short CMD_ABORT
  5253                              <1> 
  5254                              <1> 	;mov	di, bx
  5255 00005233 89DF                <1> 	mov	edi, ebx ; 21/02/2015
  5256 00005235 E80B030000          <1> 	call	COMMAND 		; OUTPUT COMMAND
  5257 0000523A 7548                <1> 	jnz	short CMD_ABORT
  5258                              <1> CMD_I1:
  5259 0000523C E876030000          <1> 	call	_WAIT			; WAIT FOR DATA REQUEST INTERRUPT
  5260 00005241 7541                <1> 	jnz	short TM_OUT		; TIME OUT
  5261                              <1> cmd_i1x:
  5262                              <1> 	; 18/02/2016
  5263                              <1> 	;;mov	cx, 256			; SECTOR SIZE IN WORDS
  5264                              <1> 	;mov	ecx, 256 ; 21/02/2015	
  5265                              <1> 	; 16/07/2022
  5266 00005243 29C9                <1> 	sub	ecx, ecx
  5267 00005245 FEC5                <1> 	inc	ch  ; ecx = 256
  5268                              <1> 	;mov	dh, HF_PORT
  5269 00005247 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]
  5270 0000524E FA                  <1> 	cli
  5271 0000524F FC                  <1> 	cld
  5272 00005250 F3666D              <1> 	rep	insw			; GET THE SECTOR
  5273 00005253 FB                  <1> 	sti
  5274                              <1> 
  5275 00005254 F645FE02            <1> 	test	byte [CMD_BLOCK+6], ECC_MODE ; CHECK FOR NORMAL INPUT
  5276 00005258 7418                <1> 	jz	short CMD_I3
  5277 0000525A E8AF030000          <1> 	call	WAIT_DRQ		; WAIT FOR DATA REQUEST
  5278 0000525F 7223                <1> 	jc	short TM_OUT
  5279                              <1> 	;mov	dx, HF_PORT
  5280 00005261 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]
  5281                              <1> 	;;mov	cx, 4			; GET ECC BYTES
  5282                              <1> 	;mov 	ecx, 4 ; mov cx, 4
  5283                              <1> 	; 16/07/2022
  5284 00005268 31C9                <1>  	xor	ecx, ecx
  5285 0000526A B104                <1> 	mov	cl, 4
  5286                              <1> CMD_I2:
  5287 0000526C EC                  <1> 	in	al, dx
  5288 0000526D 8807                <1> 	mov 	[edi], al ; 21/02/2015	; GO SLOW FOR BOARD
  5289 0000526F 47                  <1> 	inc	edi
  5290 00005270 E2FA                <1> 	loop	CMD_I2
  5291                              <1> CMD_I3: 
  5292                              <1> 	; wait for 400 ns
  5293 00005272 80C207              <1> 	add 	dl, 7
  5294 00005275 EC                  <1> 	in	al, dx
  5295 00005276 EC                  <1> 	in	al, dx
  5296 00005277 EC                  <1> 	in	al, dx
  5297                              <1> 	;
  5298 00005278 E8DE010000          <1> 	call	CHECK_STATUS
  5299 0000527D 7505                <1> 	jnz	short CMD_ABORT		; ERROR RETURNED
  5300 0000527F FE4DF9              <1> 	dec	byte [CMD_BLOCK+1]	; CHECK FOR MORE
  5301                              <1> 	;jnz	short CMD_I1
  5302 00005282 75BF                <1> 	jnz	short cmd_i1x ; 18/02/2016
  5303                              <1> CMD_ABORT:
  5304                              <1> TM_OUT: 
  5305 00005284 C3                  <1> 	retn
  5306                              <1> 
  5307                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  5308                              <1> 
  5309                              <1> ;----------------------------------------
  5310                              <1> ;	WRITE LONG	     (AH = 0BH) :
  5311                              <1> ;----------------------------------------
  5312                              <1> 
  5313                              <1> WR_LONG:
  5314                              <1> 	;mov	@CMD_BLOCK+6, WRITE_CMD OR ECC_MODE
  5315 00005285 C645FE32            <1> 	mov	byte [CMD_BLOCK+6], WRITE_CMD + ECC_MODE
  5316 00005289 EB04                <1> 	jmp	short COMMANDO
  5317                              <1> 
  5318                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  5319                              <1> 	
  5320                              <1> ;----------------------------------------
  5321                              <1> ;	DISK WRITE ROUTINE   (AH = 03H) :
  5322                              <1> ;----------------------------------------
  5323                              <1> 
  5324                              <1> DISK_WRITE:
  5325 0000528B C645FE30            <1> 	mov	byte [CMD_BLOCK+6], WRITE_CMD
  5326                              <1> 	;jmp	COMMANDO
  5327                              <1> 
  5328                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  5329                              <1> 
  5330                              <1> ;----------------------------------------
  5331                              <1> ; COMMANDO				:
  5332                              <1> ;	REPEATEDLY OUTPUTS DATA TILL	:
  5333                              <1> ;	NSECTOR RETURNS ZERO		:
  5334                              <1> ;----------------------------------------
  5335                              <1> COMMANDO:
  5336                              <1> 	; 16/07/2022 
  5337                              <1> 	;	(check 64K boundary is not needed)
  5338                              <1> 	;call	CHECK_DMA		; CHECK 64K BOUNDARY ERROR
  5339                              <1> 	;jc	short CMD_ABORT
  5340                              <1> CMD_OF: 
  5341 0000528F 89DE                <1> 	mov	esi, ebx ; 21/02/2015
  5342 00005291 E8AF020000          <1> 	call	COMMAND 		; OUTPUT COMMAND
  5343 00005296 75EC                <1> 	jnz	short CMD_ABORT
  5344 00005298 E871030000          <1> 	call	WAIT_DRQ		; WAIT FOR DATA REQUEST
  5345 0000529D 72E5                <1> 	jc	short TM_OUT		; TOO LONG
  5346                              <1> CMD_O1: 
  5347                              <1> 	; 16/07/2022
  5348 0000529F 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]
  5349                              <1> 
  5350                              <1> 	;mov	ecx, 256 ; 21/02/2015
  5351 000052A6 31C9                <1> 	xor	ecx, ecx
  5352 000052A8 FEC5                <1> 	inc	ch
  5353                              <1> 	; ecx = 256
  5354 000052AA FA                  <1> 	cli
  5355 000052AB FC                  <1> 	cld
  5356 000052AC F3666F              <1> 	rep	outsw
  5357 000052AF FB                  <1> 	sti
  5358                              <1> 
  5359 000052B0 F645FE02            <1> 	test	byte [CMD_BLOCK+6], ECC_MODE ; CHECK FOR NORMAL OUTPUT
  5360 000052B4 7418                <1> 	jz	short CMD_O3
  5361 000052B6 E853030000          <1> 	call	WAIT_DRQ		; WAIT FOR DATA REQUEST
  5362 000052BB 72C7                <1> 	jc	short TM_OUT
  5363                              <1> 	;mov	dx, HF_PORT
  5364 000052BD 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]
  5365                              <1> 					; OUTPUT THE ECC BYTES
  5366                              <1> 	;mov	ecx, 4  ; mov cx, 4
  5367                              <1> 	; 16/07/2022
  5368 000052C4 29C9                <1> 	sub	ecx, ecx
  5369 000052C6 B104                <1> 	mov	cl, 4
  5370                              <1> CMD_O2:
  5371 000052C8 8A06                <1> 	mov	al, [esi]
  5372 000052CA EE                  <1> 	out	dx, al
  5373 000052CB 46                  <1> 	inc	esi
  5374 000052CC E2FA                <1> 	loop	CMD_O2
  5375                              <1> CMD_O3:
  5376 000052CE E8E4020000          <1> 	call	_WAIT			; WAIT FOR SECTOR COMPLETE INTERRUPT
  5377 000052D3 75AF                <1> 	jnz	short TM_OUT		; ERROR RETURNED
  5378 000052D5 E881010000          <1> 	call	CHECK_STATUS
  5379 000052DA 75A8                <1> 	jnz	short CMD_ABORT
  5380 000052DC F605[D9770100]08    <1> 	test	byte [HF_STATUS], ST_DRQ ; CHECK FOR MORE
  5381 000052E3 75BA                <1> 	jnz	short CMD_O1
  5382                              <1> 	;mov	dx, HF_PORT+2		; CHECK RESIDUAL SECTOR COUNT
  5383 000052E5 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]
  5384 000052EC 80C202              <1> 	add	dl, 2
  5385                              <1> 	;inc	dl
  5386                              <1> 	;inc	dl
  5387 000052EF EC                  <1> 	in	al, dx			;
  5388 000052F0 A8FF                <1> 	test	al, 0FFh 		;
  5389 000052F2 7407                <1> 	jz	short CMD_O4		; COUNT = 0 OK
  5390 000052F4 C605[DF770100]BB    <1> 	mov	byte [DISK_STATUS1], UNDEF_ERR 
  5391                              <1> 					; OPERATION ABORTED - PARTIAL TRANSFER
  5392                              <1> CMD_O4:
  5393 000052FB C3                  <1> 	retn
  5394                              <1> 
  5395                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  5396                              <1> 
  5397                              <1> ;----------------------------------------
  5398                              <1> ;	FORMATTING	     (AH = 05H) :
  5399                              <1> ;----------------------------------------
  5400                              <1> 
  5401                              <1> FMT_TRK:				; FORMAT TRACK (AH = 005H)
  5402 000052FC C645FE50            <1> 	mov	byte [CMD_BLOCK+6], FMTTRK_CMD
  5403                              <1> 	;push	es
  5404                              <1> 	;push	bx
  5405 00005300 53                  <1> 	push	ebx
  5406 00005301 E896030000          <1> 	call	GET_VEC 		; GET DISK PARAMETERS ADDRESS
  5407                              <1> 	;mov	al, [ES:BX+14]		; GET SECTORS/TRACK
  5408 00005306 8A430E              <1> 	mov	al, [ebx+14]
  5409 00005309 8845F9              <1> 	mov	[CMD_BLOCK+1], al	; SET SECTOR COUNT IN COMMAND
  5410 0000530C 5B                  <1> 	pop	ebx
  5411                              <1> 	;pop	bx
  5412                              <1> 	;pop	es
  5413 0000530D EB80                <1> 	jmp	short CMD_OF		; GO EXECUTE THE COMMAND
  5414                              <1> 
  5415                              <1> ;----------------------------------------
  5416                              <1> ;	DISK VERIFY	     (AH = 04H) :
  5417                              <1> ;----------------------------------------
  5418                              <1> 
  5419                              <1> DISK_VERF:
  5420 0000530F C645FE40            <1> 	mov	byte [CMD_BLOCK+6], VERIFY_CMD
  5421 00005313 E82D020000          <1> 	call	COMMAND
  5422 00005318 750C                <1> 	jnz	short VERF_EXIT		; CONTROLLER STILL BUSY
  5423 0000531A E898020000          <1> 	call	_WAIT			; (Original: CALL WAIT)	
  5424 0000531F 7505                <1> 	jnz	short VERF_EXIT		; TIME OUT
  5425 00005321 E835010000          <1> 	call	CHECK_STATUS
  5426                              <1> VERF_EXIT:
  5427 00005326 C3                  <1> 	retn
  5428                              <1> 
  5429                              <1> ;----------------------------------------
  5430                              <1> ;	READ DASD TYPE	     (AH = 15H) :
  5431                              <1> ;----------------------------------------
  5432                              <1> 
  5433                              <1> RETURN_DRIVE_TYPE:
  5434                              <1> 	; 10/08/2022
  5435                              <1> 	; 13/07/2022
  5436                              <1> 	; (Ref: Programmer's Guide to the AMIBIOS -Page 214-, 1992)
  5437                              <1> 	;
  5438                              <1> 	; INPUT:
  5439                              <1> 	;	DL = Disk number (>= 80h)
  5440                              <1> 	;   TRDOS 386 v2.0.5 Feature:
  5441                              <1> 	;	If AL = 0FFh, return disk size in ECX
  5442                              <1> 	;		otherwise in CX:DX
  5443                              <1> 	; OUTPUT:
  5444                              <1> 	;	AH = 00h - No drive present
  5445                              <1> 	;	   = 03h - Hard disk drive
  5446                              <1> 	;	CF = 0 - No error
  5447                              <1> 	;	   = 1 - Error  	 
  5448                              <1> 	;   TRDOS 386 v2.0.5 Feature:
  5449                              <1> 	;	AL = 00h - LBA not ready !	
  5450                              <1> 	;	   = 01h - LBA ready 
  5451                              <1> 	;		(28 bit or 48 bit LBA r/w depending
  5452                              <1> 	;		on disk size in CX:DX)
  5453                              <1> 	;	CX:DX = Number of 512 byte sectors
  5454                              <1> 	;
  5455                              <1> 	; (Note: High words of ECX and EDX will be zero at return)
  5456                              <1> 	; ((If AL input is 0FFh, disk size will be in ECX only))
  5457                              <1> 
  5458                              <1> READ_DASD_TYPE:
  5459                              <1> READ_D_T:				; GET DRIVE PARAMETERS
  5460                              <1> 	;push	ds			; SAVE REGISTERS
  5461                              <1> 	
  5462                              <1> 	;;push	es
  5463                              <1> 	; 18/04/2021
  5464                              <1> 	;push	ebx
  5465                              <1> 	;;call	DDS			; ESTABLISH ADDRESSING
  5466                              <1> 	;;push	cs
  5467                              <1> 	;;pop	ds
  5468                              <1>         
  5469                              <1> 	; 18/04/2021
  5470                              <1> 	;mov	bx, KDATA
  5471                              <1> 	;mov	ds, bx
  5472                              <1> 	;;mov	es, bx
  5473                              <1> 	;mov	byte [DISK_STATUS1], 0
  5474                              <1> 	;mov	bl, [HF_NUM]		; GET NUMBER OF DRIVES
  5475                              <1> 	;and	dl, 7Fh			; GET DRIVE NUMBER
  5476                              <1> 	;cmp	bl, dl
  5477                              <1> 	;jbe	short RDT_NOT_PRESENT 	; RETURN DRIVE NOT PRESENT
  5478                              <1> 	
  5479                              <1> 	;mov	ax, KDATA
  5480                              <1> 	;mov	ds, ax
  5481                              <1> 	
  5482 00005327 C605[DF770100]00    <1> 	mov	byte [DISK_STATUS1], 0
  5483 0000532E 8A0D[E0770100]      <1> 	mov	cl, [HF_NUM]
  5484 00005334 80E27F              <1> 	and	dl, 7Fh
  5485 00005337 38D1                <1> 	cmp	cl, dl
  5486 00005339 7631                <1> 	jbe	short RDT_NOT_PRESENT
  5487                              <1> 
  5488                              <1> 	; 18/04/2021 - TRDOS 386 v2.0.4
  5489                              <1> 	
  5490                              <1> 	;call	GET_VEC 		; GET DISK PARAMETER ADDRESS
  5491                              <1> 	;
  5492                              <1> 	;;mov	al, [ES:BX+2]		; HEADS
  5493                              <1> 	;mov	al, [ebx+2]  ; heads (logical)
  5494                              <1> 	;;;mov	cl, [ES:BX+14]
  5495                              <1> 	;;mov	cl, [ebx+14]
  5496                              <1> 	;; 17/04/2021
  5497                              <1> 	;mov	ah, [ebx+14] ; sectors per track (logical)
  5498                              <1> 	;;imul	cl			; * NUMBER OF SECTORS
  5499                              <1> 	;;mov	cx, [ES:BX]		; MAX NUMBER OF CYLINDERS
  5500                              <1> 	;mov	cx, [ebx]    ; cylinders (logical)
  5501                              <1> 	;; 02/01/2015 
  5502                              <1> 	;; ** leave the last cylinder as reserved for diagnostics **
  5503                              <1> 	;; (Also in Award BIOS - 1999, AHDSK.ASM, FUN15 -> sub ax, 1)
  5504                              <1> 	;dec	cx			; LEAVE ONE FOR DIAGNOSTICS
  5505                              <1> 	;;imul	cx			; NUMBER OF SECTORS	 	
  5506                              <1> 	;; 17/04/2021
  5507                              <1> 	;mul	ah
  5508                              <1> 	;; ax = spt*heads
  5509                              <1> 	;mul	cx	 
  5510                              <1> 	;; dx:ax = number of sectors
  5511                              <1> 	;
  5512                              <1> 	;mov	cx, dx			; HIGH ORDER HALF
  5513                              <1> 	;mov	dx, ax			; LOW ORDER HALF
  5514                              <1> 
  5515                              <1> 	; 18/04/2021
  5516 0000533B B102                <1> 	mov	cl, 2
  5517 0000533D 00CA                <1> 	add	dl, cl ; hd0 = 2
  5518                              <1> 
  5519                              <1> 	; 13/07/2022
  5520 0000533F 0FB6D2              <1> 	movzx	edx, dl
  5521 00005342 8A9A[9E650000]      <1> 	mov	bl, [edx+drv.status]
  5522 00005348 80E301              <1> 	and	bl, 1 ; LBA ready bit (bit 0) 
  5523                              <1> 
  5524 0000534B D2E2                <1> 	shl	dl, cl ; * 4
  5525                              <1> 	
  5526                              <1> 	;mov	eax, [edx+drv.size]
  5527                              <1> 	;mov	dx, ax
  5528                              <1> 	;shr	eax, 16
  5529                              <1> 	;mov	cx, ax
  5530                              <1> 
  5531 0000534D 8B8A[82650000]      <1> 	mov	ecx, [edx+drv.size]
  5532                              <1> 
  5533                              <1> 	; 13/07/2022
  5534                              <1> 	;cmp	al, 0FFh   ; return disk size in ecx ?
  5535                              <1> 	;je	short RDT1 ; yes
  5536 00005353 FEC0                <1> 	inc	al  ; 0FFh -> 0
  5537 00005355 740A                <1> 	jz	short RDT1
  5538                              <1> 
  5539 00005357 6689CA              <1> 	mov	dx, cx
  5540 0000535A C1E910              <1> 	shr	ecx, 16
  5541                              <1> 
  5542                              <1> 	; 13/07/2022
  5543                              <1> 	; ebx = esp+20
  5544                              <1> 	; ecx = esp+16
  5545                              <1> 	; edx = esp+12
  5546                              <1> 	; esi = esp+8
  5547                              <1> 	; edi = esp+4
  5548                              <1> 
  5549                              <1> 	; return disk size in user's registers
  5550 0000535D 8954240C            <1> 	mov	[esp+12], edx
  5551                              <1> 	; cx:dx = disk size
  5552                              <1> RDT1:
  5553                              <1> 	;mov	[esp+16], ecx
  5554                              <1> 
  5555                              <1> 	;;sub	al, al
  5556 00005361 29C0                <1> 	sub	eax, eax
  5557 00005363 B403                <1> 	mov	ah, 03h			; INDICATE FIXED DISK
  5558 00005365 88D8                <1> 	mov	al, bl
  5559                              <1> 	; al = 1 -> LBA r/w ready/applicable
  5560                              <1> 	;    = 0 -> LBA r/w not ready/applicable	 
  5561                              <1> 	; cf = 0
  5562                              <1> RDT2:
  5563 00005367 894C2410            <1> 	mov	[esp+16], ecx	
  5564                              <1> ;RDT2:
  5565                              <1> 	; 13/07/2022
  5566                              <1> 	; 18/04/2021
  5567                              <1> 	;pop	ebx			; RESTORE REGISTERS
  5568                              <1> 	;;pop	es
  5569                              <1> 	;pop	ds
  5570                              <1> 	; (*) clc			; CLEAR CARRY
  5571                              <1> 	;retf	2
  5572                              <1> 	; (*) 29/05/2016
  5573                              <1> 	; (*) retf 4
  5574                              <1> 	;and	byte [esp+8], 0FEh ; clear carry bit of eflags register
  5575                              <1> 	;iretd
  5576                              <1> 
  5577                              <1> 	; 13/07/2022
  5578                              <1> 	; [DISK_STATUS1] = 0
  5579                              <1> 	; ah = 3
  5580                              <1> 	; al = 0 or 1 (LBA ready)
  5581                              <1> 	; cf = 0	
  5582                              <1> 	
  5583 0000536B C3                  <1> 	retn
  5584                              <1> 
  5585                              <1> RDT_NOT_PRESENT:
  5586                              <1> 	;;sub	ax, ax			; DRIVE NOT PRESENT RETURN
  5587                              <1> 	;; 18/04/2021
  5588                              <1> 	;sub	eax, eax
  5589                              <1> 	;;mov	cx, ax			; ZERO BLOCK COUNT
  5590                              <1> 	;;mov	dx, ax
  5591                              <1> 	;mov	ecx, eax
  5592                              <1> 	;mov	edx, eax
  5593                              <1> 	;jmp	short RDT2
  5594                              <1> 	; 13/07/2022
  5595 0000536C 29C9                <1> 	sub	ecx, ecx
  5596 0000536E 88C1                <1> 	mov	cl, al ; if AL = 0FFh, disk size will be in ECX
  5597                              <1> 		       ; if not, disk size will be in CX:DX 
  5598 00005370 29C0                <1> 	sub	eax, eax
  5599 00005372 FEC1                <1> 	inc	cl ; 0FFh -> 0
  5600 00005374 80F901              <1> 	cmp	cl, 1
  5601 00005377 72EE                <1> 	jb	short RDT2 ; ecx = 0
  5602                              <1> 	; 10/08/2022
  5603 00005379 28C9                <1> 	sub	cl, cl
  5604                              <1> 	; ecx = 0
  5605 0000537B 8944240C            <1> 	mov	[esp+12], eax ; edx = 0
  5606 0000537F F9                  <1> 	stc
  5607 00005380 EBE5                <1> 	jmp	short RDT2 ; cf = 1, eax = 0	
  5608                              <1> 
  5609                              <1> ; 10/08/2022
  5610                              <1> ; 07/08/2022
  5611                              <1> ; 13/07/2022 - TRDOS 386 v2.0.5
  5612                              <1> ; 28/05/2016
  5613                              <1> ; 27/05/2016 - TRDOS 386 (TRDOS v2.0)
  5614                              <1> 
  5615                              <1> ;----------------------------------------
  5616                              <1> ;	GET PARAMETERS	     (AH = 08H) :
  5617                              <1> ;----------------------------------------
  5618                              <1> 
  5619                              <1> GET_PARM_N:
  5620                              <1> 	; ebx = user's buffer address for parameters table
  5621                              <1> 	; 10/08/2022
  5622                              <1> 	; 13/07/2022
  5623                              <1> 	; (if ebx = 0, HDPT will not be returned to user)
  5624                              <1> 	;	
  5625                              <1> ;GET_PARM:				; GET DRIVE PARAMETERS
  5626                              <1> 	;push	ds			; SAVE REGISTERS
  5627                              <1> 	;push	es
  5628                              <1> 	
  5629                              <1> 	;push	ebx
  5630 00005382 89DF                <1> 	mov	edi, ebx ; 13/07/2022 	
  5631                              <1> 
  5632                              <1> 	; 13/07/2022
  5633                              <1> 	; ((IBM PC XT-286 ROM BIOS source code remainders))
  5634                              <1> 	;;mov	ax, ABS0 		; ESTABLISH ADDRESSING
  5635                              <1> 	;;mov	ds, ax
  5636                              <1> 	
  5637                              <1> 	;;test	dl, 1			; CHECK FOR DRIVE 1
  5638                              <1> 	;;jz	short G0
  5639                              <1> 	;;les	bx, @HF1_TBL_VEC
  5640                              <1> 	;;jmp	short G1
  5641                              <1> ;;G0:	
  5642                              <1> 	;les	bx, @HF_TBL_VEC
  5643                              <1> ;;G1:
  5644                              <1> 	;;call	DDS			; ESTABLISH SEGMENT
  5645                              <1> 	
  5646                              <1> 	; 13/07/2022
  5647                              <1> 	; 22/12/2014
  5648                              <1> 	;;push	cs
  5649                              <1> 	;;pop	ds
  5650                              <1> 	;mov	bx, KDATA
  5651                              <1> 	;mov	ds, bx
  5652                              <1> 	;mov	es, bx	; 27/05/2016
  5653                              <1> 	;
  5654                              <1> 	; 18/04/2021
  5655 00005384 29C9                <1> 	sub	ecx, ecx
  5656                              <1> 	;
  5657 00005386 80EA80              <1> 	sub	dl, 80h
  5658 00005389 80FA04              <1> 	cmp	dl, MAX_FILE		; TEST WITHIN RANGE
  5659 0000538C 7344                <1> 	jae	short G2 ; 13/07/2022
  5660                              <1> 	;
  5661                              <1>  	; 21/02/2015
  5662 0000538E 31DB                <1> 	xor	ebx, ebx
  5663                              <1> 	; 18/04/2021
  5664                              <1> 	;sub	ecx, ecx
  5665                              <1> 	; 22/12/2014
  5666 00005390 88D3                <1> 	mov	bl, dl
  5667                              <1> 	;xor	bh, bh  
  5668 00005392 C0E302              <1> 	shl	bl, 2			; convert index to offset
  5669                              <1> 	;add	bx, HF_TBL_VEC
  5670 00005395 81C3[E4770100]      <1> 	add	ebx, HF_TBL_VEC
  5671                              <1> 	;mov	ax, [bx+2]
  5672                              <1> 	;mov	es, ax			; dpt segment
  5673                              <1> 	;mov	bx, [bx]		; dpt offset
  5674 0000539B 8B1B                <1> 	mov	ebx, [ebx] ; 32 bit offset	
  5675                              <1> 	; 18/04/2021
  5676 0000539D 29D2                <1> 	sub	edx, edx
  5677 0000539F 8815[DF770100]      <1>  	mov	[DISK_STATUS1], dl ; 0
  5678                              <1> 
  5679                              <1> 	;mov	byte [DISK_STATUS1], 0
  5680                              <1>         ;mov	ax, [ES:BX]		; MAX NUMBER OF CYLINDERS
  5681 000053A5 668B03              <1> 	mov	ax, [ebx]
  5682                              <1> 	;;sub	ax, 2			; ADJUST FOR 0-N
  5683 000053A8 6648                <1> 	dec	ax			; max. cylinder number
  5684 000053AA 88C5                <1> 	mov	ch, al
  5685 000053AC 66250003            <1> 	and	ax, 0300h		; HIGH TWO BITS OF CYLINDER
  5686                              <1> 	;shr	ax, 1
  5687                              <1> 	;shr	ax, 1
  5688                              <1> 	; 13/07/2022
  5689                              <1> 	;shr	ax, 2
  5690                              <1> 	; 07/08/2022
  5691 000053B0 C1E802              <1> 	shr	eax, 2
  5692                              <1> 	;or	al, [ES:BX+14]		; SECTORS
  5693 000053B3 0A430E              <1> 	or	al, [ebx+14]
  5694 000053B6 88C1                <1> 	mov	cl, al
  5695                              <1> 	;mov	dh, [ES:BX+2]		; HEADS
  5696 000053B8 8A7302              <1> 	mov	dh, [ebx+2]
  5697 000053BB FECE                <1> 	dec	dh			; 0-N RANGE
  5698 000053BD 8A15[E0770100]      <1> 	mov	dl, [HF_NUM]		; DRIVE COUNT
  5699                              <1> 	;;sub	ax, ax
  5700                              <1> 	; 18/04/2021
  5701                              <1> 	;sub	eax, eax
  5702                              <1> 
  5703                              <1> 	; 27/12/2014 
  5704                              <1> 	;mov	di, bx			; HDPT offset
  5705                              <1> 
  5706                              <1> 	; 13/07/2022
  5707                              <1> 	; ebx = esp+20
  5708                              <1> 	; ecx = esp+16
  5709                              <1> 	; edx = esp+12
  5710                              <1> 	; esi = esp+8
  5711                              <1> 	; edi = esp+4
  5712                              <1> 
  5713                              <1> 	; 13/07/2022
  5714                              <1> 	; set return register contents/values
  5715 000053C3 894C2410            <1> 	mov	[esp+16], ecx
  5716 000053C7 8954240C            <1> 	mov	[esp+12], edx
  5717                              <1> 
  5718                              <1> 	; is hard disk parameters table requested ?
  5719 000053CB 09FF                <1> 	or	edi, edi ; (edi = [ebp+24] = ebx)
  5720 000053CD 751B                <1> 	jnz	short G3 ; yes
  5721                              <1> 
  5722 000053CF 29C0                <1> 	sub	eax, eax	
  5723                              <1> 
  5724                              <1> 	; [DISK_STATUS1] = 0
  5725                              <1> 	; eax = 0
  5726                              <1> 	; cf = 0
  5727                              <1> 
  5728 000053D1 C3                  <1> 	retn
  5729                              <1> 
  5730                              <1> G2:
  5731                              <1> 	;mov	ah, INIT_FAIL
  5732                              <1> 	;mov	byte [DISK_STATUS1], ah ; (INIT_FAIL)
  5733                              <1> 	;				; OPERATION FAILED
  5734                              <1> 	;sub	al, al
  5735                              <1> 	;sub	dx, dx
  5736                              <1> 	;sub	cx, cx
  5737                              <1> 	; 18/04/2021
  5738 000053D2 29C0                <1> 	sub	eax, eax
  5739 000053D4 B407                <1> 	mov	ah, INIT_FAIL
  5740 000053D6 8825[DF770100]      <1> 	mov     [DISK_STATUS1], ah	; OPERATION FAILED
  5741                              <1> 
  5742                              <1> 	; 13/07/2022
  5743                              <1> 	;sub	edx, edx
  5744                              <1> 	;sub	ecx, ecx
  5745                              <1> 	; ecx = 0
  5746 000053DC 894C240C            <1> 	mov	[esp+12], ecx ; 0 ; edx (heads-1, drive count)
  5747 000053E0 894C2410            <1> 	mov	[esp+16], ecx ; 0 ; ecx (cylinders-1, sectors)
  5748 000053E4 894C2414            <1> 	mov	[esp+20], ecx ; 0 ; ebx (HDPT address)
  5749                              <1> 
  5750 000053E8 F9                  <1> 	stc
  5751 000053E9 C3                  <1> 	retn
  5752                              <1> 
  5753                              <1> 	; 13/07/2022
  5754                              <1> 	; 29/05/2016 (*)
  5755                              <1> 	;;stc				; SET ERROR FLAG
  5756                              <1> 	;;jmp	short G5
  5757                              <1> 	;jmp	short _G6
  5758                              <1> 
  5759                              <1> G3:	
  5760                              <1> 	; 27/05/2016
  5761                              <1> 	; return fixed disk parameters table to user
  5762                              <1> 	; in user's buffer, which is pointed by EBX
  5763                              <1> 	
  5764                              <1> 	;xchg	edi, [esp]		; ebx (input)-> edi, edi -> [esp]
  5765                              <1> 	; 13/07/2022
  5766                              <1> 	;pop	edi
  5767                              <1> 	; edi = user's buffer address
  5768                              <1> 	;push	esi
  5769 000053EA 89DE                <1> 	mov	esi, ebx		; hard disk parameter table (32 bytes)	
  5770                              <1> 	;mov	ebx, edi		; ebx = user's buffer address
  5771 000053EC 51                  <1> 	push	ecx
  5772                              <1> 	;push	eax
  5773                              <1> 	;mov	ecx, 32 ; 32 bytes
  5774 000053ED 30ED                <1> 	xor	ch, ch
  5775 000053EF B120                <1> 	mov	cl, 32
  5776                              <1> 	; ecx = 32
  5777 000053F1 E8B3B90000          <1> 	call	transfer_to_user_buffer ; trdosk6.s (16/05/2016)
  5778                              <1> 	;pop	eax
  5779 000053F6 59                  <1> 	pop	ecx
  5780                              <1> 	; 10/08/2022
  5781                              <1> 	;pop	esi
  5782                              <1> 	;pop	edi
  5783 000053F7 7306                <1> 	jnc	short G4
  5784                              <1> 	; 29/05/2016 (*)
  5785 000053F9 B8FF000000          <1> 	mov	eax, 0FFh ; unknown error !
  5786                              <1> 	; [DISK_STATUS1] = 0
  5787                              <1> 	; ah = 0, al = 0FFh
  5788                              <1> 	; cf = 1
  5789                              <1> 	
  5790 000053FE C3                  <1> 	retn
  5791                              <1> ;_G6:
  5792                              <1> 	;or	byte [esp+16], 1 ; set carry bit of eflags register
  5793                              <1> ;G5:
  5794                              <1> 	; 27/05/2016
  5795                              <1> 	;pop	ebx			; RESTORE REGISTERS
  5796                              <1> 	;pop	es
  5797                              <1> 	;pop	ds
  5798                              <1> 	;;retf	2
  5799                              <1> 	; (*) 29/05/2016
  5800                              <1> 	; (*) retf 4
  5801                              <1> 	; (*) or byte [esp+8], 1 ; set carry bit of eflags register
  5802                              <1> 	;iretd
  5803                              <1> 
  5804                              <1> G4:
  5805                              <1> 	; 13/07/2022
  5806 000053FF 31C0                <1> 	xor	eax, eax
  5807                              <1> 
  5808                              <1> 	; [user_buffer] = [ebp+24] = HDPT
  5809                              <1> 	; [DISK_STATUS1] = 0
  5810                              <1> 	; eax = 0
  5811                              <1> 	; cf = 0
  5812                              <1> 
  5813 00005401 C3                  <1> 	retn
  5814                              <1> 
  5815                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  5816                              <1> 	
  5817                              <1> ;----------------------------------------
  5818                              <1> ;	INITIALIZE DRIVE     (AH = 09H) :
  5819                              <1> ;----------------------------------------
  5820                              <1> 	; 03/01/2015
  5821                              <1> 	; According to ATA-ATAPI specification v2.0 to v5.0
  5822                              <1> 	; logical sector per logical track
  5823                              <1> 	; and logical heads - 1 would be set but
  5824                              <1> 	; it is seen as it will be good
  5825                              <1> 	; if physical parameters will be set here
  5826                              <1> 	; because, number of heads <= 16.
  5827                              <1> 	; (logical heads usually more than 16)
  5828                              <1> 	; NOTE: ATA logical parameters (software C, H, S)
  5829                              <1> 	;	== INT 13h physical parameters
  5830                              <1> 
  5831                              <1> ;INIT_DRV:
  5832                              <1> ;	mov	byte [CMD_BLOCK+6], SET_PARM_CMD
  5833                              <1> ;	call	GET_VEC 		; ES:BX -> PARAMETER BLOCK
  5834                              <1> ;	mov	al, [es:bx+2]		; GET NUMBER OF HEADS
  5835                              <1> ;	dec	al			; CONVERT TO 0-INDEX
  5836                              <1> ;	mov	ah, [CMD_BLOCK+5] 	; GET SDH REGISTER
  5837                              <1> ;	and	ah, 0F0h 		; CHANGE HEAD NUMBER
  5838                              <1> ;	or	ah, al			; TO MAX HEAD
  5839                              <1> ;	mov	[CMD_BLOCK+5], ah
  5840                              <1> ;	mov	al, [es:bx+14]		; MAX SECTOR NUMBER
  5841                              <1> ;	mov	[CMD_BLOCK+1], al
  5842                              <1> ;	sub	ax, ax
  5843                              <1> ;	mov	[CMD_BLOCK+3], al 	; ZERO FLAGS
  5844                              <1> ;	call	COMMAND 		; TELL CONTROLLER
  5845                              <1> ;	jnz	short INIT_EXIT		; CONTROLLER BUSY ERROR
  5846                              <1> ;	call	NOT_BUSY		; WAIT FOR IT TO BE DONE
  5847                              <1> ;	jnz	short INIT_EXIT		; TIME OUT
  5848                              <1> ;	call	CHECK_STATUS
  5849                              <1> ;INIT_EXIT:
  5850                              <1> ;	retn
  5851                              <1> 
  5852                              <1> ; 16/07/2022 - TRDOS 386 v2.0.5
  5853                              <1> 
  5854                              <1> ; 04/01/2015
  5855                              <1> ; 02/01/2015 - Derived from from AWARD BIOS 1999
  5856                              <1> ;				 AHDSK.ASM - INIT_DRIVE
  5857                              <1> INIT_DRV:
  5858                              <1> 	;xor	ah,ah
  5859 00005402 31C0                <1> 	xor	eax, eax ; 21/02/2015
  5860 00005404 B00B                <1> 	mov	al, 11 ; Physical heads from translated HDPT
  5861 00005406 3825[F4770100]      <1>         cmp     [LBAMode], ah   ; 0
  5862 0000540C 7702                <1> 	ja	short idrv0
  5863 0000540E B002                <1> 	mov	al, 2  ; Physical heads from standard HDPT
  5864                              <1> idrv0:
  5865                              <1> 	; DL = drive number (0 based)
  5866 00005410 E887020000          <1> 	call	GET_VEC
  5867                              <1> 	;push	bx
  5868 00005415 53                  <1> 	push	ebx ; 21/02/2015
  5869                              <1> 	;add	bx, ax
  5870 00005416 01C3                <1> 	add	ebx, eax
  5871                              <1> 	;; 05/01/2015
  5872 00005418 8A25[72650000]      <1> 	mov	ah, [hf_m_s] ; drive number (0= master, 1= slave)
  5873                              <1> 	;;and 	ah, 1 
  5874 0000541E C0E404              <1> 	shl	ah, 4
  5875 00005421 80CCA0              <1> 	or	ah, 0A0h  ; Drive/Head register - 10100000b (A0h)	
  5876                              <1> 	;mov	al, [es:bx]
  5877 00005424 8A03                <1> 	mov	al, [ebx] ; 21/02/2015
  5878 00005426 FEC8                <1> 	dec	al	 ; last head number 
  5879                              <1> 	;and	al, 0Fh
  5880 00005428 08E0                <1> 	or	al, ah	 ; lower 4 bits for head number
  5881                              <1> 	;
  5882 0000542A C645FE91            <1> 	mov	byte [CMD_BLOCK+6], SET_PARM_CMD
  5883 0000542E 8845FD              <1> 	mov	[CMD_BLOCK+5], al
  5884                              <1> 	;pop	bx
  5885 00005431 5B                  <1> 	pop	ebx
  5886 00005432 29C0                <1> 	sub	eax, eax ; 21/02/2015
  5887 00005434 B004                <1> 	mov	al, 4	; Physical sec per track from translated HDPT
  5888 00005436 803D[F4770100]00    <1> 	cmp	byte [LBAMode], 0
  5889 0000543D 7702                <1> 	ja	short idrv1
  5890 0000543F B00E                <1> 	mov	al, 14	; Physical sec per track from standard HDPT
  5891                              <1> idrv1:
  5892                              <1> 	;xor	ah, ah
  5893                              <1> 	;add	bx, ax
  5894 00005441 01C3                <1> 	add	ebx, eax ; 21/02/2015
  5895                              <1> 	;mov	al, [es:bx]
  5896                              <1> 			; sector number
  5897 00005443 8A03                <1> 	mov	al, [ebx]
  5898 00005445 8845F9              <1> 	mov	[CMD_BLOCK+1], al
  5899 00005448 28C0                <1> 	sub	al, al
  5900 0000544A 8845FB              <1> 	mov	[CMD_BLOCK+3], al ; ZERO FLAGS
  5901 0000544D E8F3000000          <1> 	call	COMMAND 	  ; TELL CONTROLLER
  5902 00005452 751E                <1> 	jnz	short INIT_EXIT	  ; CONTROLLER BUSY ERROR
  5903 00005454 E88E010000          <1> 	call	NOT_BUSY	  ; WAIT FOR IT TO BE DONE
  5904 00005459 7517                <1> 	jnz	short INIT_EXIT	  ; TIME OUT
  5905                              <1> 	; 16/07/2022
  5906                              <1> 	;call	CHECK_STATUS
  5907                              <1> 	;jmp	short CHECK_STATUS
  5908                              <1> ;INIT_EXIT:
  5909                              <1> 	;retn
  5910                              <1> 
  5911                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  5912                              <1> 	; 10/07/2022 - Retro UNIX 386 v1.1 (Kernel v0.2.1.5)
  5913                              <1> 
  5914                              <1> ;----------------------------------------
  5915                              <1> ;	CHECK FIXED DISK STATUS 	:
  5916                              <1> ;----------------------------------------
  5917                              <1> CHECK_STATUS:
  5918 0000545B E8D9010000          <1> 	call	CHECK_ST		; CHECK THE STATUS BYTE
  5919                              <1> 	;jnz	short CHECK_S1		; AN ERROR WAS FOUND
  5920                              <1> 	; 10/07/2022
  5921 00005460 7510                <1> 	jnz	short CHECK_S2
  5922 00005462 A801                <1> 	test	al, ST_ERROR		; WERE THERE ANY OTHER ERRORS
  5923 00005464 7405                <1> 	jz	short CHECK_S1		; NO ERROR REPORTED
  5924 00005466 E80E020000          <1> 	call	CHECK_ER		; ERROR REPORTED
  5925                              <1> CHECK_S1:
  5926 0000546B 803D[DF770100]00    <1> 	cmp	byte [DISK_STATUS1], 0 	; SET STATUS FOR CALLER
  5927                              <1> CHECK_S2:
  5928                              <1> INIT_EXIT:	; 10/07/2022
  5929 00005472 C3                  <1> 	retn
  5930                              <1> 
  5931                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  5932                              <1> 
  5933                              <1> ;----------------------------------------
  5934                              <1> ;	SEEK		     (AH = 0CH) :
  5935                              <1> ;----------------------------------------
  5936                              <1> 
  5937                              <1> DISK_SEEK:
  5938 00005473 C645FE70            <1>         mov	byte [CMD_BLOCK+6], SEEK_CMD
  5939 00005477 E8C9000000          <1> 	call	COMMAND
  5940 0000547C 751C                <1> 	jnz	short DS_EXIT		; CONTROLLER BUSY ERROR
  5941 0000547E E834010000          <1> 	call	_WAIT
  5942 00005483 7515                <1>         jnz	short DS_EXIT		; TIME OUT ON SEEK
  5943 00005485 E8D1FFFFFF          <1> 	call	CHECK_STATUS
  5944 0000548A 803D[DF770100]40    <1>         cmp	byte [DISK_STATUS1], BAD_SEEK
  5945 00005491 7507                <1> 	jne	short DS_EXIT
  5946 00005493 C605[DF770100]00    <1>         mov	byte [DISK_STATUS1], 0
  5947                              <1> DS_EXIT:
  5948 0000549A C3                  <1> 	retn
  5949                              <1> 
  5950                              <1> ;----------------------------------------
  5951                              <1> ;	TEST DISK READY      (AH = 10H) :
  5952                              <1> ;----------------------------------------
  5953                              <1> 
  5954                              <1> TST_RDY:				; WAIT FOR CONTROLLER
  5955 0000549B E847010000          <1> 	call	NOT_BUSY
  5956 000054A0 751C                <1> 	jnz	short TR_EX
  5957 000054A2 8A45FD              <1> 	mov	al, [CMD_BLOCK+5] 	; SELECT DRIVE
  5958 000054A5 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]
  5959 000054AC 80C206              <1> 	add	dl, 6
  5960 000054AF EE                  <1> 	out	dx, al
  5961 000054B0 E884010000          <1> 	call	CHECK_ST		; CHECK STATUS ONLY
  5962 000054B5 7507                <1> 	jnz	short TR_EX
  5963 000054B7 C605[DF770100]00    <1> 	mov	byte [DISK_STATUS1], 0 	; WIPE OUT DATA CORRECTED ERROR
  5964                              <1> TR_EX:	
  5965 000054BE C3                  <1> 	retn
  5966                              <1> 
  5967                              <1> ;----------------------------------------
  5968                              <1> ;	RECALIBRATE	     (AH = 11H) :
  5969                              <1> ;----------------------------------------
  5970                              <1> 
  5971                              <1> HDISK_RECAL:
  5972 000054BF C645FE10            <1>         mov	byte [CMD_BLOCK+6], RECAL_CMD ; 10h, 16
  5973 000054C3 E87D000000          <1> 	call	COMMAND 		; START THE OPERATION
  5974 000054C8 7523                <1> 	jnz	short RECAL_EXIT	; ERROR
  5975 000054CA E8E8000000          <1> 	call	_WAIT			; WAIT FOR COMPLETION
  5976 000054CF 7407                <1> 	jz	short RECAL_X 		; TIME OUT ONE OK ?
  5977 000054D1 E8E1000000          <1> 	call	_WAIT			; WAIT FOR COMPLETION LONGER
  5978 000054D6 7515                <1> 	jnz	short RECAL_EXIT	; TIME OUT TWO TIMES IS ERROR
  5979                              <1> RECAL_X:
  5980 000054D8 E87EFFFFFF          <1> 	call	CHECK_STATUS
  5981 000054DD 803D[DF770100]40    <1> 	cmp	byte [DISK_STATUS1], BAD_SEEK ; SEEK NOT COMPLETE
  5982 000054E4 7507                <1> 	jne	short RECAL_EXIT	; IS OK
  5983 000054E6 C605[DF770100]00    <1> 	mov	byte [DISK_STATUS1], 0
  5984                              <1> RECAL_EXIT:
  5985 000054ED 803D[DF770100]00    <1>         cmp	byte [DISK_STATUS1], 0
  5986 000054F4 C3                  <1> 	retn
  5987                              <1> 
  5988                              <1> ;----------------------------------------
  5989                              <1> ;      CONTROLLER DIAGNOSTIC (AH = 14H) :
  5990                              <1> ;----------------------------------------
  5991                              <1> 
  5992                              <1> CTLR_DIAGNOSTIC:
  5993                              <1> 	; 07/08/2022 - TRDOS 386 v2.0.5
  5994 000054F5 FA                  <1> 	cli				; DISABLE INTERRUPTS WHILE CHANGING MASK
  5995 000054F6 E4A1                <1> 	in	al, INTB01		; TURN ON SECOND INTERRUPT CHIP
  5996                              <1> 	;and	al, 0BFH
  5997 000054F8 243F                <1> 	and	al, 3Fh			; enable IRQ 14 & IRQ 15
  5998                              <1> 	;jmp	$+2
  5999                              <1> 	IODELAY
    78 000054FA EB00                <2>  jmp short $+2
    79 000054FC EB00                <2>  jmp short $+2
  6000 000054FE E6A1                <1> 	out	INTB01, al
  6001                              <1> 	IODELAY
    78 00005500 EB00                <2>  jmp short $+2
    79 00005502 EB00                <2>  jmp short $+2
  6002 00005504 E421                <1> 	in	al, INTA01		; LET INTERRUPTS PASS THRU TO
  6003 00005506 24FB                <1> 	and	al, 0FBh 		;  SECOND CHIP
  6004                              <1> 	;jmp	$+2
  6005                              <1> 	IODELAY
    78 00005508 EB00                <2>  jmp short $+2
    79 0000550A EB00                <2>  jmp short $+2
  6006 0000550C E621                <1> 	out	INTA01, al
  6007 0000550E FB                  <1> 	sti
  6008 0000550F E8D3000000          <1> 	call	NOT_BUSY		; WAIT FOR CARD
  6009 00005514 7526                <1> 	jnz	short CD_ERR		; BAD CARD
  6010                              <1> 	;mov	dx, PORT+7
  6011 00005516 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]
  6012 0000551D 80C207              <1> 	add	dl, 7
  6013 00005520 B090                <1> 	mov	al, DIAG_CMD		; START DIAGNOSE
  6014 00005522 EE                  <1> 	out	dx, al
  6015 00005523 E8BF000000          <1> 	call	NOT_BUSY		; WAIT FOR IT TO COMPLETE
  6016 00005528 B480                <1> 	mov	ah, TIME_OUT
  6017 0000552A 7512                <1> 	jnz	short CD_EXIT 		; TIME OUT ON DIAGNOSTIC
  6018                              <1> 	;mov	dx, HF_PORT+1		; GET ERROR REGISTER
  6019 0000552C 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]
  6020 00005533 FEC2                <1> 	inc	dl
  6021 00005535 EC                  <1> 	in	al, dx
  6022                              <1> 	; 07/08/2022
  6023                              <1> 	;mov	[HF_ERROR], al		; SAVE IT
  6024 00005536 B400                <1> 	mov	ah, 0
  6025 00005538 3C01                <1> 	cmp	al, 1			; CHECK FOR ALL OK
  6026 0000553A 7402                <1> 	je	short CD_EXIT
  6027                              <1> CD_ERR:
  6028 0000553C B420                <1> 	mov	ah, BAD_CNTLR
  6029                              <1> CD_EXIT:
  6030 0000553E 8825[DF770100]      <1> 	mov	[DISK_STATUS1], ah
  6031 00005544 C3                  <1> 	retn
  6032                              <1> 
  6033                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  6034                              <1> 	; 10/07/2022 - Retro UNIX 386 v1.1 (Kernel v0.2.1.5)
  6035                              <1> 
  6036                              <1> ;--------------------------------------------------------
  6037                              <1> ; COMMAND						:
  6038                              <1> ;	THIS ROUTINE OUTPUTS THE COMMAND BLOCK		:
  6039                              <1> ; OUTPUT						:
  6040                              <1> ;	BL = STATUS					:
  6041                              <1> ;	BH = ERROR REGISTER				:
  6042                              <1> ;--------------------------------------------------------
  6043                              <1> 
  6044                              <1> COMMAND:
  6045                              <1> 	;push	ebx ; 10/07/2022	; WAIT FOR SEEK COMPLETE AND READY
  6046                              <1> 	;;mov	ecx, DELAY_2		; SET INITIAL DELAY BEFORE TEST
  6047                              <1> COMMAND1:
  6048                              <1> 	;;push	ecx			; SAVE LOOP COUNT
  6049 00005545 E851FFFFFF          <1> 	call	TST_RDY 		; CHECK DRIVE READY
  6050                              <1> 	;;pop	ecx
  6051                              <1> 	;pop	ebx ; 10/07/2022
  6052 0000554A 7418                <1> 	jz	short COMMAND2		; DRIVE IS READY
  6053 0000554C 803D[DF770100]80    <1>         cmp	byte [DISK_STATUS1], TIME_OUT ; TST_RDY TIMED OUT--GIVE UP
  6054                              <1> 	;jz	short CMD_TIMEOUT
  6055                              <1> 	;;loop	COMMAND1		; KEEP TRYING FOR A WHILE
  6056                              <1> 	;jmp	short COMMAND4		; ITS NOT GOING TO GET READY
  6057 00005553 7507                <1> 	jne	short COMMAND4
  6058                              <1> CMD_TIMEOUT:
  6059 00005555 C605[DF770100]20    <1> 	mov	byte [DISK_STATUS1], BAD_CNTLR
  6060                              <1> COMMAND4:
  6061                              <1> 	;;pop	ebx ; 10/07/2022
  6062 0000555C 803D[DF770100]00    <1>         cmp	byte [DISK_STATUS1], 0	; SET CONDITION CODE FOR CALLER
  6063 00005563 C3                  <1> 	retn
  6064                              <1> COMMAND2:
  6065                              <1> 	;;pop	ebx ; 10/07/2022
  6066                              <1> 	;push	edi ; 10/07/2022
  6067 00005564 C605[DA770100]00    <1> 	mov	byte [HF_INT_FLAG], 0	; RESET INTERRUPT FLAG
  6068 0000556B FA                  <1> 	cli				; INHIBIT INTERRUPTS WHILE CHANGING MASK
  6069 0000556C E4A1                <1> 	in	al, INTB01		; TURN ON SECOND INTERRUPT CHIP
  6070                              <1> 	;and	al, 0BFh
  6071 0000556E 243F                <1> 	and	al, 3Fh			; Enable IRQ 14 & 15
  6072                              <1> 	;jmp	$+2
  6073                              <1> 	IODELAY
    78 00005570 EB00                <2>  jmp short $+2
    79 00005572 EB00                <2>  jmp short $+2
  6074 00005574 E6A1                <1> 	out	INTB01, al
  6075 00005576 E421                <1> 	in	al, INTA01		; LET INTERRUPTS PASS THRU TO
  6076 00005578 24FB                <1> 	and	al, 0FBh 		; SECOND CHIP
  6077                              <1> 	;jmp	$+2
  6078                              <1> 	IODELAY
    78 0000557A EB00                <2>  jmp short $+2
    79 0000557C EB00                <2>  jmp short $+2
  6079 0000557E E621                <1> 	out	INTA01, al
  6080 00005580 FB                  <1> 	sti
  6081                              <1> 	;xor	edi, edi		; INDEX THE COMMAND TABLE
  6082                              <1> 	; 10/07/2022
  6083 00005581 31C9                <1> 	xor	ecx, ecx
  6084                              <1> 	;mov	dx, HF_PORT+1		; DISK ADDRESS
  6085 00005583 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]
  6086 0000558A FEC2                <1> 	inc	dl
  6087 0000558C F605[E1770100]C0    <1> 	test	byte [CONTROL_BYTE], 0C0h ; CHECK FOR RETRY SUPPRESSION
  6088 00005593 7411                <1> 	jz	short COMMAND3
  6089 00005595 8A45FE              <1> 	mov	al, [CMD_BLOCK+6] 	; YES-GET OPERATION CODE
  6090 00005598 24F0                <1> 	and	al, 0F0h 		; GET RID OF MODIFIERS
  6091 0000559A 3C20                <1> 	cmp	al, 20h			; 20H-40H IS READ, WRITE, VERIFY
  6092 0000559C 7208                <1> 	jb	short COMMAND3
  6093 0000559E 3C40                <1> 	cmp	al, 40h
  6094 000055A0 7704                <1> 	ja	short COMMAND3
  6095 000055A2 804DFE01            <1> 	or	byte [CMD_BLOCK+6], NO_RETRIES 
  6096                              <1> 					; VALID OPERATION FOR RETRY SUPPRESS
  6097                              <1> COMMAND3:
  6098                              <1> 	;mov	al, [CMD_BLOCK+edi]	; GET THE COMMAND STRING BYTE
  6099                              <1> 	; 10/07/2022
  6100 000055A6 8A440DF8            <1> 	mov	al, [CMD_BLOCK+ecx]
  6101 000055AA EE                  <1> 	out	dx, al			; GIVE IT TO CONTROLLER
  6102                              <1> 	IODELAY
    78 000055AB EB00                <2>  jmp short $+2
    79 000055AD EB00                <2>  jmp short $+2
  6103                              <1> 	;inc	edi			; NEXT BYTE IN COMMAND BLOCK
  6104                              <1> 	; 10/07/2022
  6105 000055AF 41                  <1> 	inc	ecx
  6106                              <1> 	;inc	dx			; NEXT DISK ADAPTER REGISTER
  6107 000055B0 42                  <1> 	inc	edx   ; 10/07/2022	
  6108                              <1> 	;cmp	di, 7 ; 01/01/2015	; ALL DONE?
  6109                              <1> 	;jne	short COMMAND3		; NO--GO DO NEXT ONE
  6110 000055B1 80F907              <1> 	cmp	cl, 7 ; 10/07/2022
  6111 000055B4 72F0                <1> 	jb	short COMMAND3
  6112                              <1> 	;pop	edi ; 10/07/2022
  6113 000055B6 C3                  <1> 	retn				; ZERO FLAG IS SET
  6114                              <1> 
  6115                              <1> ;CMD_TIMEOUT:
  6116                              <1> ;	mov	byte [DISK_STATUS1], BAD_CNTLR
  6117                              <1> ;COMMAND4:
  6118                              <1> ;	pop	ebx
  6119                              <1> ;	cmp	byte [DISK_STATUS1], 0 	; SET CONDITION CODE FOR CALLER
  6120                              <1> ;	retn
  6121                              <1> 
  6122                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  6123                              <1> 	; 10/07/2022 - Retro UNIX 386 v1.1 (Kernel v0.2.1.5)
  6124                              <1> 
  6125                              <1> ;----------------------------------------
  6126                              <1> ;	WAIT FOR INTERRUPT		:
  6127                              <1> ;----------------------------------------
  6128                              <1> ;WAIT:
  6129                              <1> _WAIT:
  6130 000055B7 FB                  <1> 	sti				; MAKE SURE INTERRUPTS ARE ON
  6131                              <1> 	;sub	cx, cx			; SET INITIAL DELAY BEFORE TEST
  6132                              <1> 	;clc
  6133                              <1> 	;mov	ax, 9000h		; DEVICE WAIT INTERRUPT
  6134                              <1> 	;int	15h
  6135                              <1> 	;jc	short WT2		; DEVICE TIMED OUT
  6136                              <1> 	;mov	bl, DELAY_1		; SET DELAY COUNT
  6137                              <1> 
  6138                              <1> 	;mov	bl, WAIT_HDU_INT_HI
  6139                              <1> 	;; 21/02/2015
  6140                              <1> 	;;mov	bl, WAIT_HDU_INT_HI + 1
  6141                              <1> 	;;mov	cx, WAIT_HDU_INT_LO
  6142 000055B8 B915160500          <1> 	mov	ecx, WAIT_HDU_INT_LH
  6143                              <1> 					; (AWARD BIOS -> WAIT_FOR_MEM)
  6144                              <1> ;-----	WAIT LOOP
  6145                              <1> 
  6146                              <1> WT1:	
  6147                              <1> 	;test	byte [HF_INT_FLAG], 80h	; TEST FOR INTERRUPT
  6148 000055BD F605[DA770100]C0    <1> 	test 	byte [HF_INT_FLAG], 0C0h
  6149                              <1> 	;loopz	WT1
  6150 000055C4 7512                <1> 	jnz	short WT3		; INTERRUPT--LETS GO
  6151                              <1> 	;dec	bl
  6152                              <1> 	;jnz	short WT1		; KEEP TRYING FOR A WHILE
  6153                              <1> 
  6154                              <1> WT1_hi:
  6155 000055C6 E461                <1> 	in	al, SYS1 ; 61h (PORT_B)	; wait for lo to hi
  6156 000055C8 A810                <1> 	test	al, 10h			; transition on memory
  6157 000055CA 75FA                <1> 	jnz	short WT1_hi		; refresh.
  6158                              <1> WT1_lo:
  6159 000055CC E461                <1> 	in	al, SYS1 		; 061h (PORT_B)	
  6160 000055CE A810                <1> 	test	al, 10h			
  6161 000055D0 74FA                <1> 	jz	short WT1_lo
  6162 000055D2 E2E9                <1> 	loop	WT1
  6163                              <1> 	;;or	bl, bl
  6164                              <1> 	;;jz	short WT2	
  6165                              <1> 	;;dec	bl
  6166                              <1> 	;;jmp	short WT1
  6167                              <1> 	;dec	bl
  6168                              <1> 	;jnz	short WT1	
  6169                              <1> WT2:	
  6170                              <1> 	; 10/07/2022
  6171                              <1> 	;mov	byte [DISK_STATUS1], TIME_OUT ; REPORT TIME OUT ERROR
  6172 000055D4 B080                <1> 	mov	al, TIME_OUT
  6173 000055D6 EB07                <1> 	jmp	short WT4
  6174                              <1> WT3:
  6175                              <1> 	;mov	byte [DISK_STATUS1], 0
  6176                              <1> 	;mov	byte [HF_INT_FLAG], 0
  6177 000055D8 28C0                <1> 	sub	al, al ; 0
  6178 000055DA A2[DA770100]        <1> 	mov	byte [HF_INT_FLAG], al
  6179                              <1> WT4:
  6180                              <1> NB2:	
  6181 000055DF A2[DF770100]        <1> 	mov	byte [DISK_STATUS1], al
  6182                              <1> 
  6183                              <1> 	;cmp	byte [DISK_STATUS1], 0 	; SET CONDITION CODE FOR CALLER
  6184 000055E4 20C0                <1> 	and	al, al
  6185                              <1> 	; zf = 0 -> time out, zf = 1 -> ok
  6186 000055E6 C3                  <1> 	retn
  6187                              <1> 
  6188                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  6189                              <1> 	; 10/07/2022 - Retro UNIX 386 v1.1 (Kernel v0.2.1.5)
  6190                              <1> 
  6191                              <1> ;----------------------------------------
  6192                              <1> ;	WAIT FOR CONTROLLER NOT BUSY	:
  6193                              <1> ;----------------------------------------
  6194                              <1> NOT_BUSY:
  6195 000055E7 FB                  <1> 	sti				; MAKE SURE INTERRUPTS ARE ON
  6196                              <1> 	;push	ebx
  6197                              <1> 	;sub	cx, cx			; SET INITIAL DELAY BEFORE TEST
  6198 000055E8 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]
  6199 000055EF 80C207              <1> 	add	dl, 7			; Status port (HF_PORT+7)
  6200                              <1> 	;mov	bl, DELAY_1
  6201                              <1> 					; wait for 10 seconds
  6202                              <1> 	;mov 	cx, WAIT_HDU_INT_LO	; 1615h
  6203                              <1> 	;;mov 	bl, WAIT_HDU_INT_HI	;   05h
  6204                              <1> 	;mov	bl, WAIT_HDU_INT_HI + 1
  6205 000055F2 B915160500          <1> 	mov	ecx, WAIT_HDU_INT_LH  ; 21/02/2015
  6206                              <1> 	;
  6207                              <1> 	;;mov	byte [wait_count], 0    ; Reset wait counter
  6208                              <1> NB1:	
  6209 000055F7 EC                  <1> 	in	al, dx			; CHECK STATUS
  6210                              <1> 	;test	al, ST_BUSY
  6211 000055F8 2480                <1> 	and	al, ST_BUSY
  6212                              <1> 	;loopnz NB1
  6213 000055FA 74E3                <1> 	jz	short NB2 ; al = 0	; NOT BUSY--LETS GO
  6214                              <1> 	;dec	bl			
  6215                              <1> 	;jnz	short NB1		; KEEP TRYING FOR A WHILE
  6216                              <1> 
  6217                              <1> NB1_hi: 
  6218 000055FC E461                <1> 	in	al, SYS1		; wait for hi to lo
  6219 000055FE A810                <1> 	test	al, 010h		; transition on memory
  6220 00005600 75FA                <1> 	jnz	short NB1_hi		; refresh.
  6221                              <1> NB1_lo: 
  6222 00005602 E461                <1> 	in	al, SYS1
  6223 00005604 A810                <1> 	test	al, 010h
  6224 00005606 74FA                <1> 	jz	short NB1_lo
  6225 00005608 E2ED                <1> 	loop	NB1
  6226                              <1> 	;dec	bl
  6227                              <1> 	;jnz	short NB1
  6228                              <1> 	;
  6229                              <1> 	;;cmp	byte [wait_count], 182  ; 10 seconds (182 timer ticks)
  6230                              <1> 	;;jb	short NB1
  6231                              <1> 	;
  6232                              <1> 	;mov	byte [DISK_STATUS1], TIME_OUT ; REPORT TIME OUT ERROR
  6233                              <1> 	;jmp	short NB3
  6234 0000560A B080                <1> 	mov	al, TIME_OUT
  6235                              <1> ;NB2:	
  6236 0000560C EBD1                <1> 	jmp	short NB2 ; 10/07/2022
  6237                              <1> 
  6238                              <1> ;	;mov	byte [DISK_STATUS1], 0
  6239                              <1> ;;NB3:	
  6240                              <1> ;	;pop	ebx
  6241                              <1> ;	mov	[DISK_STATUS1], al	;;; will be set after return
  6242                              <1> ;	;cmp	byte [DISK_STATUS1], 0 	; SET CONDITION CODE FOR CALLER
  6243                              <1> ;	or	al, al			; (zf = 0 --> timeout)
  6244                              <1> ;	retn
  6245                              <1> 
  6246                              <1> ;----------------------------------------
  6247                              <1> ;	WAIT FOR DATA REQUEST		:
  6248                              <1> ;----------------------------------------
  6249                              <1> WAIT_DRQ:
  6250                              <1> 	;mov	cx, DELAY_3
  6251                              <1> 	;mov	dx, HF_PORT+7
  6252 0000560E 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]
  6253 00005615 80C207              <1> 	add	dl, 7
  6254                              <1> 	;;mov	bl, WAIT_HDU_DRQ_HI	; 0
  6255                              <1> 	;mov	cx, WAIT_HDU_DRQ_LO	; 1000 (30 milli seconds)
  6256                              <1> 					; (but it is written as 2000
  6257                              <1> 					; micro seconds in ATORGS.ASM file
  6258                              <1> 					; of Award Bios - 1999, D1A0622)
  6259 00005618 B9E8030000          <1> 	mov 	ecx, WAIT_HDU_DRQ_LH ; 21/02/2015 
  6260                              <1> WQ_1:
  6261 0000561D EC                  <1> 	in	al, dx			; GET STATUS
  6262 0000561E A808                <1> 	test	al, ST_DRQ		; WAIT FOR DRQ
  6263 00005620 7516                <1> 	jnz	short WQ_OK
  6264                              <1> 	;loop	WQ_1			; KEEP TRYING FOR A SHORT WHILE
  6265                              <1> WQ_hi:	
  6266 00005622 E461                <1> 	in	al, SYS1		; wait for hi to lo
  6267 00005624 A810                <1> 	test	al, 010h		; transition on memory
  6268 00005626 75FA                <1> 	jnz	short WQ_hi		; refresh.
  6269                              <1> WQ_lo:  
  6270 00005628 E461                <1> 	in	al, SYS1
  6271 0000562A A810                <1> 	test	al, 010h
  6272 0000562C 74FA                <1> 	jz	short WQ_lo
  6273 0000562E E2ED                <1> 	loop	WQ_1
  6274                              <1> 
  6275 00005630 C605[DF770100]80    <1> 	mov	byte [DISK_STATUS1], TIME_OUT ; ERROR
  6276 00005637 F9                  <1> 	stc
  6277                              <1> WQ_OK:
  6278 00005638 C3                  <1> 	retn
  6279                              <1> ;WQ_OK:
  6280                              <1> 	;clc
  6281                              <1> 	;ret
  6282                              <1> 
  6283                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  6284                              <1> 
  6285                              <1> ;----------------------------------------
  6286                              <1> ;	CHECK FIXED DISK STATUS BYTE	:
  6287                              <1> ;----------------------------------------
  6288                              <1> CHECK_ST:
  6289                              <1> 	;mov	dx, HF_PORT+7		; GET THE STATUS
  6290 00005639 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]
  6291 00005640 80C207              <1> 	add	dl, 7
  6292                              <1> 	
  6293                              <1> 	; 17/02/2016
  6294                              <1> 	;(http://wiki.osdev.org/ATA_PIO_Mode)
  6295                              <1> 	;"delay 400ns to allow drive to set new values of BSY and DRQ"
  6296 00005643 EC                  <1> 	in	al, dx
  6297                              <1> 	;in	al, dx ; 100ns
  6298                              <1> 	;in	al, dx ; 100ns
  6299                              <1>  	;in	al, dx ; 100ns
  6300                              <1> 	NEWIODELAY ; 18/02/2016 (AWARD BIOS - 1999, 'CKST' in AHSDK.ASM)
    83 00005644 E6EB                <2>  out 0EBh, al
  6301                              <1> 	;
  6302                              <1> 
  6303                              <1> 	; 16/07/2022
  6304 00005646 A2[D9770100]        <1> 	mov	[HF_STATUS], al
  6305                              <1> 	;mov	ah, 0
  6306 0000564B 28E4                <1> 	sub	ah, ah ; 0
  6307 0000564D A880                <1> 	test	al, ST_BUSY		; IF STILL BUSY
  6308 0000564F 751A                <1> 	jnz	short CKST_EXIT		; REPORT OK
  6309 00005651 B4CC                <1> 	mov	ah, WRITE_FAULT
  6310 00005653 A820                <1> 	test 	al, ST_WRT_FLT		; CHECK FOR WRITE FAULT
  6311 00005655 7514                <1> 	jnz	short CKST_EXIT
  6312 00005657 B4AA                <1> 	mov	ah, NOT_RDY
  6313 00005659 A840                <1> 	test	al, ST_READY		; CHECK FOR NOT READY
  6314 0000565B 740E                <1> 	jz	short CKST_EXIT
  6315 0000565D B440                <1> 	mov	ah, BAD_SEEK
  6316 0000565F A810                <1> 	test	al, ST_SEEK_COMPL	; CHECK FOR SEEK NOT COMPLETE
  6317 00005661 7408                <1> 	jz	short CKST_EXIT
  6318 00005663 B411                <1> 	mov	ah, DATA_CORRECTED
  6319 00005665 A804                <1> 	test	al, ST_CORRCTD		; CHECK FOR CORRECTED ECC
  6320 00005667 7502                <1> 	jnz	short CKST_EXIT
  6321                              <1> 	;mov	ah, 0
  6322 00005669 30E4                <1> 	xor	ah, ah ; 0
  6323                              <1> CKST_EXIT:
  6324 0000566B 8825[DF770100]      <1> 	mov	[DISK_STATUS1], ah	; SET ERROR FLAG
  6325 00005671 80FC11              <1> 	cmp	ah, DATA_CORRECTED	; KEEP GOING WITH DATA CORRECTED
  6326 00005674 7402                <1> 	je	short CKST_EX1
  6327                              <1> 	;cmp	ah, 0
  6328 00005676 20E4                <1> 	and	ah, ah
  6329                              <1> CKST_EX1:
  6330 00005678 C3                  <1> 	retn
  6331                              <1> 
  6332                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  6333                              <1> 
  6334                              <1> ;----------------------------------------
  6335                              <1> ;	CHECK FIXED DISK ERROR REGISTER :
  6336                              <1> ;----------------------------------------
  6337                              <1> CHECK_ER:
  6338                              <1> 	;mov	dx, HF_PORT+1		; GET THE ERROR REGISTER
  6339 00005679 668B15[6E650000]    <1> 	mov	dx, [HF_PORT]		;
  6340 00005680 FEC2                <1> 	inc	dl
  6341 00005682 EC                  <1> 	in	al, dx
  6342                              <1> 	; 16/07/2022
  6343                              <1> 	;mov	[HF_ERROR], al
  6344                              <1> 	;push	ebx  ; 21/02/2015
  6345 00005683 29C9                <1> 	sub	ecx, ecx
  6346                              <1> 	;mov	ecx, 8			; TEST ALL 8 BITS
  6347 00005685 B108                <1> 	mov	cl, 8
  6348                              <1> CK1:	
  6349 00005687 D0E0                <1> 	shl	al, 1			; MOVE NEXT ERROR BIT TO CARRY
  6350 00005689 7202                <1> 	jc	short CK2		; FOUND THE ERROR
  6351 0000568B E2FA                <1> 	loop	CK1			; KEEP TRYING
  6352                              <1> CK2:
  6353                              <1> 	;mov	ebx, ERR_TBL		; COMPUTE ADDRESS OF
  6354                              <1> 	;add	ebx, ecx		; ERROR CODE
  6355 0000568D 81C1[64650000]      <1> 	add	ecx, ERR_TBL ; 16/07/2022	
  6356                              <1> 
  6357                              <1> 	;;;mov	ah, byte [cs:bx]	; GET ERROR CODE
  6358                              <1> 	;;mov	ah, [bx]
  6359                              <1> 	;mov	ah, [ebx] ; 21/02/2015
  6360 00005693 8A21                <1> 	mov	ah, [ecx]	
  6361                              <1> CKEX:
  6362 00005695 8825[DF770100]      <1> 	mov	[DISK_STATUS1], ah	; SAVE ERROR CODE
  6363                              <1> 	; 16/07/2022
  6364                              <1> 	;pop	ebx
  6365                              <1> 	;;cmp	ah, 0
  6366                              <1> 	;and	ah, ah
  6367 0000569B C3                  <1> 	retn
  6368                              <1> 
  6369                              <1> ;--------------------------------------------------------
  6370                              <1> ; CHECK_DMA						:
  6371                              <1> ;  -CHECK ES:BX AND # SECTORS TO MAKE SURE THAT IT WILL :
  6372                              <1> ;   FIT WITHOUT SEGMENT OVERFLOW.			:
  6373                              <1> ;  -ES:BX HAS BEEN REVISED TO THE FORMAT SSSS:000X	:
  6374                              <1> ;  -OK IF # SECTORS < 80H (7FH IF LONG READ OR WRITE)	:
  6375                              <1> ;  -OK IF # SECTORS = 80H (7FH) AND BX <= 00H (04H)	:
  6376                              <1> ;  -ERROR OTHERWISE					:
  6377                              <1> ;--------------------------------------------------------
  6378                              <1> 
  6379                              <1> 	; 16/07/2022 - TRDOS 386 v2.0.5
  6380                              <1> 	; (not needed for hard disks and 32 bit OS)
  6381                              <1> 
  6382                              <1> ;CHECK_DMA:
  6383                              <1> ;	; 11/04/2021 (32 bit push/pop)
  6384                              <1> ;	push	eax			; SAVE REGISTERS
  6385                              <1> ;	mov	ax, 8000h		; AH = MAX # SECTORS
  6386                              <1> ;					; AL = MAX OFFSET
  6387                              <1> ;	test	byte [CMD_BLOCK+6], ECC_MODE
  6388                              <1> ;	jz	short CKD1
  6389                              <1> ;	mov	ah, 7F04h		; ECC IS 4 MORE BYTES
  6390                              <1> ;CKD1:	
  6391                              <1> ;	cmp	ah, [CMD_BLOCK+1] 	; NUMBER OF SECTORS
  6392                              <1> ;	ja	short CKDOK		; IT WILL FIT
  6393                              <1> ;	jb	short CKDERR		; TOO MANY
  6394                              <1> ;	cmp	al, bl			; CHECK OFFSET ON MAX SECTORS
  6395                              <1> ;	;jb	short CKDERR		; ERROR
  6396                              <1> ;	jnb	short CKDOK ; 16/07/2022
  6397                              <1> ;;CKDOK:	
  6398                              <1> ;	;clc				; CLEAR CARRY
  6399                              <1> ;	;pop	eax
  6400                              <1> ;	;retn				; NORMAL RETURN
  6401                              <1> ;CKDERR:
  6402                              <1> ;	;stc				; INDICATE ERROR
  6403                              <1> ;	mov	byte [DISK_STATUS1], DMA_BOUNDARY
  6404                              <1> ;CKDOK:
  6405                              <1> ;	pop	eax
  6406                              <1> ;	retn
  6407                              <1> 
  6408                              <1> ;----------------------------------------
  6409                              <1> ;	SET UP EBX-> DISK PARMS		:
  6410                              <1> ;----------------------------------------
  6411                              <1> 					
  6412                              <1> ; INPUT -> DL = 0 based drive number
  6413                              <1> ; OUTPUT -> EBX = disk parameter table address
  6414                              <1> 
  6415                              <1> GET_VEC:
  6416                              <1> 	;sub	ax, ax			; GET DISK PARAMETER ADDRESS
  6417                              <1> 	;mov	es, ax
  6418                              <1> 	;test	dl, 1
  6419                              <1> 	;jz	short GV_0
  6420                              <1> ;	les	bx, [HF1_TBL_VEC] 	; ES:BX -> DRIVE PARAMETERS
  6421                              <1> ;	jmp	short GV_EXIT
  6422                              <1> ;GV_0:
  6423                              <1> ;	les 	bx,[HF_TBL_VEC]		; ES:BX -> DRIVE PARAMETERS
  6424                              <1> ;
  6425 0000569C 31DB                <1> 	xor	ebx, ebx
  6426 0000569E 88D3                <1> 	mov	bl, dl
  6427                              <1> 	;02/01/2015
  6428                              <1> 	;xor	bh, bh
  6429                              <1> 	;shl	bl, 1			; port address offset
  6430                              <1> 	;mov	ax, [bx+hd_ports]	; Base port address (1F0h, 170h)
  6431                              <1> 	;shl	bl, 1			; dpt pointer offset
  6432 000056A0 C0E302              <1> 	shl	bl, 2
  6433                              <1> 	;add	bx, HF_TBL_VEC		; Disk parameter table pointer
  6434 000056A3 81C3[E4770100]      <1> 	add	ebx, HF_TBL_VEC ; 21/02/2015
  6435                              <1> 	;push	word [bx+2]		; dpt segment
  6436                              <1> 	;pop	es
  6437                              <1> 	;mov	bx, [bx]		; dpt offset
  6438 000056A9 8B1B                <1> 	mov	ebx, [ebx]		
  6439                              <1> ;GV_EXIT:
  6440 000056AB C3                  <1> 	retn
  6441                              <1> 
  6442                              <1> hdc1_int: ; 21/02/2015
  6443                              <1> ;--- HARDWARE INT 76H -- ( IRQ LEVEL 14 ) -----------------------
  6444                              <1> ;								:
  6445                              <1> ;	FIXED DISK INTERRUPT ROUTINE				:
  6446                              <1> ;								:
  6447                              <1> ;----------------------------------------------------------------
  6448                              <1> 
  6449                              <1> ; 22/12/2014
  6450                              <1> ; IBM PC-XT Model 286 System BIOS Source Code - DISK.ASM (HD_INT)
  6451                              <1> ;	 '11/15/85'
  6452                              <1> ; AWARD BIOS 1999 (D1A0622) 
  6453                              <1> ;	Source Code - ATORGS.ASM (INT_HDISK, INT_HDISK1)
  6454                              <1> 
  6455                              <1> ;int_76h:
  6456                              <1> HD_INT:
  6457                              <1> 	; 11/04/2021 (32 bit push/pop)
  6458 000056AC 50                  <1> 	push	eax
  6459 000056AD 1E                  <1> 	push	ds
  6460                              <1> 	;call	DDS
  6461                              <1> 	; 21/02/2015 (32 bit, 386 pm modification)
  6462 000056AE 66B81000            <1> 	mov	ax, KDATA
  6463 000056B2 8ED8                <1> 	mov 	ds, ax
  6464                              <1> 	;
  6465                              <1> 	;;mov	@HF_INT_FLAG,0FFH	; ALL DONE
  6466                              <1>         ;mov	byte [CS:HF_INT_FLAG], 0FFh
  6467 000056B4 C605[DA770100]FF    <1> 	mov	byte [HF_INT_FLAG], 0FFh
  6468                              <1> 	;
  6469 000056BB 52                  <1> 	push	edx
  6470 000056BC 66BAF701            <1> 	mov	dx, HDC1_BASEPORT+7	; Status Register (1F7h)
  6471                              <1> 					; Clear Controller
  6472                              <1> Clear_IRQ1415:				; (Award BIOS - 1999)
  6473 000056C0 EC                  <1> 	in	al, dx			;
  6474 000056C1 5A                  <1> 	pop	edx
  6475                              <1> 	NEWIODELAY
    83 000056C2 E6EB                <2>  out 0EBh, al
  6476                              <1> 	;
  6477 000056C4 B020                <1> 	mov	al, EOI			; NON-SPECIFIC END OF INTERRUPT
  6478 000056C6 E6A0                <1> 	out	INTB00, al		; FOR CONTROLLER #2
  6479                              <1> 	;jmp	$+2			; WAIT
  6480                              <1> 	NEWIODELAY
    83 000056C8 E6EB                <2>  out 0EBh, al
  6481 000056CA E620                <1> 	out	INTA00, al		; FOR CONTROLLER #1
  6482 000056CC 1F                  <1> 	pop	ds
  6483                              <1> 	;sti				; RE-ENABLE INTERRUPTS
  6484                              <1> 	;mov	ax, 9100h		; DEVICE POST
  6485                              <1> 	;int	15h			;  INTERRUPT
  6486                              <1> irq15_iret: ; 25/02/2015
  6487 000056CD 58                  <1> 	pop	eax
  6488 000056CE CF                  <1> 	iretd				; RETURN FROM INTERRUPT
  6489                              <1> 
  6490                              <1> hdc2_int: ; 21/02/2015
  6491                              <1> ;--- HARDWARE INT 77H -- ( IRQ LEVEL 15 ) -----------------------
  6492                              <1> ;								:
  6493                              <1> ;	FIXED DISK INTERRUPT ROUTINE				:
  6494                              <1> ;								:
  6495                              <1> ;----------------------------------------------------------------
  6496                              <1> 
  6497                              <1> ;int_77h:
  6498                              <1> HD1_INT:
  6499                              <1> 	; 11/04/2021 (32 bit push/pop)
  6500 000056CF 50                  <1> 	push	eax
  6501                              <1> 	; Check if that is a spurious IRQ (from slave PIC)
  6502                              <1> 	; 25/02/2015 (source: http://wiki.osdev.org/8259_PIC)
  6503 000056D0 B00B                <1> 	mov	al, 0Bh  ; In-Service Register
  6504 000056D2 E6A0                <1> 	out	0A0h, al
  6505 000056D4 EB00                <1>         jmp short $+2
  6506 000056D6 EB00                <1> 	jmp short $+2
  6507 000056D8 E4A0                <1> 	in	al, 0A0h
  6508 000056DA 2480                <1> 	and 	al, 80h ; bit 7 (is it real IRQ 15 or fake?)
  6509 000056DC 74EF                <1> 	jz	short irq15_iret ; Fake (spurious) IRQ, do not send EOI)
  6510                              <1> 	;
  6511 000056DE 1E                  <1> 	push	ds
  6512                              <1> 	;call	DDS
  6513                              <1> 	; 21/02/2015 (32 bit, 386 pm modification)
  6514 000056DF 66B81000            <1> 	mov	ax, KDATA
  6515 000056E3 8ED8                <1> 	mov 	ds, ax
  6516                              <1> 	;
  6517                              <1> 	;;mov	@HF_INT_FLAG,0FFH	; ALL DONE
  6518                              <1>         ;or	byte [CS:HF_INT_FLAG],0C0h 
  6519 000056E5 800D[DA770100]C0    <1> 	or	byte [HF_INT_FLAG], 0C0h
  6520                              <1> 	;
  6521 000056EC 52                  <1> 	push	edx
  6522 000056ED 66BA7701            <1> 	mov	dx, HDC2_BASEPORT+7	; Status Register (177h)
  6523                              <1> 					; Clear Controller (Award BIOS 1999)
  6524 000056F1 EBCD                <1> 	jmp	short Clear_IRQ1415
  6525                              <1> 
  6526                              <1> ;%include 'diskdata.inc' ; 11/03/2015
  6527                              <1> ;%include 'diskbss.inc' ; 11/03/2015
  6528                              <1> 
  6529                              <1> ;////////////////////////////////////////////////////////////////////
  6530                              <1> ;; END OF DISK I/O SYTEM ///
  3108                                  %include 'memory.s'  ; 09/03/2015
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel) - v2.0.7 - memory.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 29/11/2023  (Previous: 29/08/2023)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 24/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Turkish Rational DOS
    11                              <1> ; Operating System Project v2.0 by ERDOGAN TAN (Beginning: 04/01/2016)
    12                              <1> ;
    13                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    14                              <1> ; memory.inc (18/10/2015)
    15                              <1> ; ****************************************************************************
    16                              <1> 
    17                              <1> ; MEMORY.ASM - Retro UNIX 386 v1 MEMORY MANAGEMENT FUNCTIONS (PROCEDURES)
    18                              <1> ; Retro UNIX 386 v1 Kernel (unix386.s, v0.2.0.14) - MEMORY.INC
    19                              <1> ; Last Modification: 18/10/2015
    20                              <1> 
    21                              <1> ; ///////// MEMORY MANAGEMENT FUNCTIONS (PROCEDURES) ///////////////
    22                              <1> 
    23                              <1> ;;04/11/2014 (unix386.s)	
    24                              <1> ;PDE_A_PRESENT	equ	1		; Present flag for PDE
    25                              <1> ;PDE_A_WRITE	equ 	2		; Writable (write permission) flag
    26                              <1> ;PDE_A_USER	equ	4		; User (non-system/kernel) page flag
    27                              <1> ;;
    28                              <1> ;PTE_A_PRESENT	equ	1		; Present flag for PTE (bit 0)
    29                              <1> ;PTE_A_WRITE	equ 	2		; Writable (write permission) flag (bit 1)
    30                              <1> ;PTE_A_USER	equ	4		; User (non-system/kernel) page flag (bit 2)
    31                              <1> ;PTE_A_ACCESS   equ	32		; Accessed flag (bit 5) ; 09/03/2015
    32                              <1> 
    33                              <1> ; 27/04/2015
    34                              <1> ; 09/03/2015
    35                              <1> PAGE_SIZE 	equ 4096		; page size in bytes
    36                              <1> PAGE_SHIFT 	equ 12			; page table shift count
    37                              <1> PAGE_D_SHIFT 	equ 22	; 12 + 10	; page directory shift count
    38                              <1> PAGE_OFF	equ 0FFFh		; 12 bit byte offset in page frame
    39                              <1> PTE_MASK 	equ 03FFh		; page table entry mask
    40                              <1> PTE_DUPLICATED  equ 200h		; duplicated page sign (AVL bit 0)
    41                              <1> PDE_A_CLEAR	equ 0F000h		; to clear PDE attribute bits
    42                              <1> PTE_A_CLEAR	equ 0F000h		; to clear PTE attribute bits
    43                              <1> LOGIC_SECT_SIZE equ 512			; logical sector size
    44                              <1> ERR_MAJOR_PF	equ 0E0h		; major error: page fault
    45                              <1> ERR_MINOR_IM	equ 4 ;15/10/2016 (1->4); insufficient (out of) memory
    46                              <1> ERR_MINOR_PV	equ 6 ;15/10/2016 (1->4); protection violation
    47                              <1> SWP_DISK_READ_ERR 	   equ 40
    48                              <1> SWP_DISK_NOT_PRESENT_ERR   equ 41
    49                              <1> SWP_SECTOR_NOT_PRESENT_ERR equ 42
    50                              <1> SWP_NO_FREE_SPACE_ERR      equ 43
    51                              <1> SWP_DISK_WRITE_ERR         equ 44
    52                              <1> SWP_NO_PAGE_TO_SWAP_ERR    equ 45
    53                              <1> PTE_A_ACCESS_BIT equ 5  ; Bit 5 (accessed flag)        
    54                              <1> SECTOR_SHIFT     equ 3  ; sector shift (to convert page block number)
    55                              <1> ; 12/07/2016
    56                              <1> PTE_SHARED	 equ 400h		; AVL bit 1, direct memory access bit	
    57                              <1> 					; (Indicates that the page is not allocated
    58                              <1> 					; for the process, it is a shared or system
    59                              <1>                                         ; page, it must not be deallocated!)
    60                              <1> ; 14/12/2020
    61                              <1> ; (Linear Frame Buffer - video memory mark : AVL bit 1, outside M.A.T.)
    62                              <1> PDE_EXTERNAL	equ 400h	; Page directory entry for external memory blocks
    63                              <1> PTE_EXTERNAL	equ 400h	; Allocated kernel pages for Linear Frame Buffer
    64                              <1> 				; (Out of memory allocation table)	
    65                              <1> 
    66                              <1> ;
    67                              <1> ;; Retro Unix 386 v1 - paging method/principles
    68                              <1> ;;
    69                              <1> ;; 10/10/2014
    70                              <1> ;; RETRO UNIX 386 v1 - PAGING METHOD/PRINCIPLES
    71                              <1> ;;
    72                              <1> ;; KERNEL PAGE MAP: 1 to 1 physical memory page map
    73                              <1> ;;	(virtual address = physical address)
    74                              <1> ;; KERNEL PAGE TABLES:
    75                              <1> ;;	Kernel page directory and all page tables are
    76                              <1> ;;	on memory as initialized, as equal to physical memory
    77                              <1> ;;	layout. Kernel pages can/must not be swapped out/in.
    78                              <1> ;;
    79                              <1> ;;	what for: User pages may be swapped out, when accessing
    80                              <1> ;;	a page in kernel/system mode, if it would be swapped out,
    81                              <1> ;;	kernel would have to swap it in! But it is also may be
    82                              <1> ;;	in use by a user process. (In system/kernel mode
    83                              <1> ;;	kernel can access all memory pages even if they are
    84                              <1> ;;	reserved/allocated for user processes. Swap out/in would
    85                              <1> ;;	cause conflicts.) 
    86                              <1> ;;	
    87                              <1> ;;	As result of these conditions,
    88                              <1> ;;	all kernel pages must be initialized as equal to 
    89                              <1> ;;	physical layout for preventing page faults. 
    90                              <1> ;;	Also, calling "allocate page" procedure after
    91                              <1> ;;	a page fault can cause another page fault (double fault)
    92                              <1> ;;	if all kernel page tables would not be initialized.
    93                              <1> ;;
    94                              <1> ;;	[first_page] = Beginning of users space, as offset to 
    95                              <1> ;;	memory allocation table. (double word aligned)
    96                              <1> ;;
    97                              <1> ;;	[next_page] = first/next free space to be searched
    98                              <1> ;;	as offset to memory allocation table. (dw aligned)
    99                              <1> ;;
   100                              <1> ;;	[last_page] = End of memory (users space), as offset
   101                              <1> ;;	to memory allocation table. (double word aligned)
   102                              <1> ;;
   103                              <1> ;; USER PAGE TABLES:
   104                              <1> ;;	Demand paging (& 'copy on write' allocation method) ...
   105                              <1> ;;		'ready only' marked copies of the 
   106                              <1> ;;		parent process's page table entries (for
   107                              <1> ;;		same physical memory).
   108                              <1> ;;		(A page will be copied to a new page after
   109                              <1> ;;		 if it causes R/W page fault.)
   110                              <1> ;;
   111                              <1> ;;	Every user process has own (different)
   112                              <1> ;;	page directory and page tables.	
   113                              <1> ;;
   114                              <1> ;;	Code starts at virtual address 0, always.
   115                              <1> ;;	(Initial value of EIP is 0 in user mode.)
   116                              <1> ;;	(Programs can be written/developed as simple
   117                              <1> ;;	 flat memory programs.)
   118                              <1> ;;
   119                              <1> ;; MEMORY ALLOCATION STRATEGY:
   120                              <1> ;;	Memory page will be allocated by kernel only 
   121                              <1> ;;		(in kernel/system mode only).
   122                              <1> ;;	* After a
   123                              <1> ;;	  - 'not present' page fault
   124                              <1> ;;	  - 'writing attempt on read only page' page fault 	 	
   125                              <1> ;;	* For loading (opening, reading) a file or disk/drive
   126                              <1> ;;	* As responce to 'allocate additional memory blocks' 
   127                              <1> ;;	  request by running process.
   128                              <1> ;;	* While creating a process, allocating a new buffer,
   129                              <1> ;;	  new page tables etc.
   130                              <1> ;;
   131                              <1> ;;	At first,
   132                              <1> ;;	- 'allocate page' procedure will be called;
   133                              <1> ;,	   if it will return with a valid (>0) physical address
   134                              <1> ;;	   (that means the relevant M.A.T. bit has been RESET)	
   135                              <1> ;;	   relevant memory page/block will be cleared (zeroed).
   136                              <1> ;;	- 'allocate page' will be called for allocating page
   137                              <1> ;;	   directory, page table and running space (data/code).
   138                              <1> ;;	- every successful 'allocate page' call will decrease
   139                              <1> ;;	  'free_pages' count (pointer).
   140                              <1> ;;	- 'out of (insufficient) memory error' will be returned
   141                              <1> ;;	  if 'free_pages' points to a ZERO.
   142                              <1> ;;	- swapping out and swapping in (if it is not a new page)
   143                              <1> ;;	  procedures will be called as responce to 'out of memory'
   144                              <1> ;;	  error except errors caused by attribute conflicts.
   145                              <1> ;;	 (swapper functions)	 
   146                              <1> ;;					
   147                              <1> ;;	At second,
   148                              <1> ;;	- page directory entry will be updated then page table
   149                              <1> ;;	  entry will be updated.		
   150                              <1> ;;
   151                              <1> ;; MEMORY ALLOCATION TABLE FORMAT:
   152                              <1> ;;	- M.A.T. has a size according to available memory as
   153                              <1> ;;	  follows:
   154                              <1> ;;		  - 1 (allocation) bit per 1 page (4096 bytes)
   155                              <1> ;;		  - a bit with value of 0 means allocated page
   156                              <1> ;;		  - a bit with value of 1 means a free page
   157                              <1> ;,	- 'free_pages' pointer holds count of free pages
   158                              <1> ;;	  depending on M.A.T.
   159                              <1> ;;		(NOTE: Free page count will not be checked
   160                              <1> ;;		again -on M.A.T.- after initialization. 
   161                              <1> ;;		Kernel will trust on initial count.)
   162                              <1> ;,	- 'free_pages' count will be decreased by allocation
   163                              <1> ;;	  and it will be increased by deallocation procedures.
   164                              <1> ;;	
   165                              <1> ;;	- Available memory will be calculated during
   166                              <1> ;;	  the kernel's initialization stage (in real mode).
   167                              <1> ;;	  Memory allocation table and kernel page tables 
   168                              <1> ;;	  will be formatted/sized as result of available
   169                              <1> ;;	  memory calculation before paging is enabled.
   170                              <1> ;;
   171                              <1> ;; For 4GB Available/Present Memory: (max. possible memory size)
   172                              <1> ;;	- Memory Allocation Table size will be 128 KB.
   173                              <1> ;;	- Memory allocation for kernel page directory size 
   174                              <1> ;;	  is always 4 KB. (in addition to total allocation size
   175                              <1> ;;	  for page tables)
   176                              <1> ;;	- Memory allocation for kernel page tables (1024 tables)
   177                              <1> ;;	  is 4 MB (1024*4*1024 bytes).
   178                              <1> ;;	- User (available) space will be started 
   179                              <1> ;;	  at 6th MB of the memory (after 1MB+4MB).
   180                              <1> ;;	- The first 640 KB is for kernel's itself plus
   181                              <1> ;;	  memory allocation table and kernel's page directory
   182                              <1> ;;	  (D0000h-EFFFFh may be used as kernel space...)	
   183                              <1> ;;	- B0000h to B7FFFh address space (32 KB) will be used
   184                              <1> ;; 	  for buffers.
   185                              <1> ;;	- ROMBIOS, VIDEO BUFFER and VIDEO ROM space are reserved.
   186                              <1> ;,	  (A0000h-AFFFFh, C0000h-CFFFFh, F0000h-FFFFFh)
   187                              <1> ;;	- Kernel page tables start at 100000h (2nd MB)
   188                              <1> ;;
   189                              <1> ;; For 1GB Available Memory:
   190                              <1> ;;	- Memory Allocation Table size will be 32 KB.
   191                              <1> ;;	- Memory allocation for kernel page directory size 
   192                              <1> ;;	  is always 4 KB. (in addition to total allocation size
   193                              <1> ;;	  for page tables)
   194                              <1> ;;	- Memory allocation for kernel page tables (256 tables)
   195                              <1> ;;	  is 1 MB (256*4*1024 bytes).
   196                              <1> ;;	- User (available) space will be started 
   197                              <1> ;;	  at 3th MB of the memory (after 1MB+1MB).
   198                              <1> ;;	- The first 640 KB is for kernel's itself plus
   199                              <1> ;;	  memory allocation table and kernel's page directory
   200                              <1> ;;	  (D0000h-EFFFFh may be used as kernel space...)	
   201                              <1> ;;	- B0000h to B7FFFh address space (32 KB) will be used
   202                              <1> ;; 	  for buffers.
   203                              <1> ;;	- ROMBIOS, VIDEO BUFFER and VIDEO ROM space are reserved.
   204                              <1> ;,	  (A0000h-AFFFFh, C0000h-CFFFFh, F0000h-FFFFFh)
   205                              <1> ;;	- Kernel page tables start at 100000h (2nd MB).	
   206                              <1> ;;
   207                              <1> ;;
   208                              <1> 
   209                              <1> 
   210                              <1> ;;************************************************************************************
   211                              <1> ;; 
   212                              <1> ;; RETRO UNIX 386 v1 - Paging (Method for Copy On Write paging principle)
   213                              <1> ;; DEMAND PAGING - PARENT&CHILD PAGE TABLE DUPLICATION PRINCIPLES (23/04/2015)
   214                              <1> 
   215                              <1> ;; Main factor: "sys fork" system call 
   216                              <1> ;;	
   217                              <1> ;; 		FORK
   218                              <1> ;;                      |----> parent - duplicated PTEs, read only pages
   219                              <1> ;;  writable pages ---->|
   220                              <1> ;;                      |----> child - duplicated PTEs, read only pages
   221                              <1> ;; 
   222                              <1> ;; AVL bit (0) of Page Table Entry is used as duplication sign 
   223                              <1> ;; 
   224                              <1> ;; AVL Bit 0 [PTE Bit 9] = 'Duplicated PTE belongs to child' sign/flag (if it is set)
   225                              <1> ;; Note: Dirty bit (PTE bit 6) may be used instead of AVL bit 0 (PTE bit 9)
   226                              <1> ;;       -while R/W bit is 0-. 
   227                              <1> ;; 
   228                              <1> ;; Duplicate page tables with writable pages (the 1st sys fork in the process):
   229                              <1> ;; # Parent's Page Table Entries are updated to point same pages as read only, 
   230                              <1> ;;   as duplicated PTE bit  -AVL bit 0, PTE bit 9- are reset/clear.
   231                              <1> ;; # Then Parent's Page Table is copied to Child's Page Table.
   232                              <1> ;; # Child's Page Table Entries are updated as duplicated child bit
   233                              <1> ;;   -AVL bit 0, PTE bit 9- is set.	  
   234                              <1> ;; 
   235                              <1> ;; Duplicate page tables with read only pages (several sys fork system calls):
   236                              <1> ;; # Parent's read only pages are copied to new child pages. 
   237                              <1> ;;   Parent's PTE attributes are not changed.
   238                              <1> ;;   (Because, there is another parent-child fork before this fork! We must not
   239                              <1> ;;    destroy/mix previous fork result).
   240                              <1> ;; # Child's Page Table Entries (which are corresponding to Parent's 
   241                              <1> ;;   read only pages) are set as writable (while duplicated PTE bit is clear). 
   242                              <1> ;; # Parent's PTEs with writable page attribute are updated to point same pages 
   243                              <1> ;;   as read only, (while) duplicated PTE bit is reset (clear).
   244                              <1> ;; # Parent's Page Table Entries (with writable page attribute) are duplicated 
   245                              <1> ;;   as Child's Page Table Entries without copying actual page.
   246                              <1> ;; # Child 's Page Table Entries (which are corresponding to Parent's writable 
   247                              <1> ;;   pages) are updated as duplicated PTE bit (AVL bit 0, PTE bit 9- is set.
   248                              <1> ;; 
   249                              <1> ;; !? WHAT FOR (duplication after duplication):
   250                              <1> ;; In UNIX method for sys fork (a typical 'fork' application in /etc/init)
   251                              <1> ;; program/executable code continues from specified location as child process, 
   252                              <1> ;; returns back previous code location as parent process, every child after 
   253                              <1> ;; every sys fork uses last image of code and data just prior the fork.
   254                              <1> ;; Even if the parent code changes data, the child will not see the changed data 
   255                              <1> ;; after the fork. In Retro UNIX 8086 v1, parent's process segment (32KB)
   256                              <1> ;; was copied to child's process segment (all of code and data) according to
   257                              <1> ;; original UNIX v1 which copies all of parent process code and data -core- 
   258                              <1> ;; to child space -core- but swaps that core image -of child- on to disk.
   259                              <1> ;; If I (Erdogan Tan) would use a method of to copy parent's core
   260                              <1> ;; (complete running image of parent process) to the child process; 
   261                              <1> ;; for big sizes, i would force Retro UNIX 386 v1 to spend many memory pages 
   262                              <1> ;; and times only for a sys fork. (It would excessive reservation for sys fork,
   263                              <1> ;; because sys fork usually is prior to sys exec; sys exec always establishes
   264                              <1> ;; a new/fresh core -running space-, by clearing all code/data content). 
   265                              <1> ;; 'Read Only' page flag ensures page fault handler is needed only for a few write
   266                              <1> ;; attempts between sys fork and sys exec, not more... (I say so by thinking 
   267                              <1> ;; of "/etc/init" content, specially.) sys exec will clear page tables and
   268                              <1> ;; new/fresh pages will be used to load and run new executable/program.
   269                              <1> ;; That is what for i have preferred "copy on write", "duplication" method
   270                              <1> ;; for sharing same read only pages between parent and child processes.
   271                              <1> ;; That is a pitty i have to use new private flag (AVL bit 0, "duplicated PTE 
   272                              <1> ;; belongs to child" sign) for cooperation on duplicated pages between a parent 
   273                              <1> ;; and it's child processes; otherwise parent process would destroy data belongs
   274                              <1> ;; to its child or vice versa; or some pages would remain unclaimed 
   275                              <1> ;; -deallocation problem-.
   276                              <1> ;; Note: to prevent conflicts, read only pages must not be swapped out... 
   277                              <1> ;; 
   278                              <1> ;; WHEN PARENT TRIES TO WRITE IT'S READ ONLY (DUPLICATED) PAGE:
   279                              <1> ;; # Page fault handler will do those:
   280                              <1> ;;   - 'Duplicated PTE' flag (PTE bit 9) is checked (on the failed PTE).
   281                              <1> ;;   - If it is reset/clear, there is a child uses same page.
   282                              <1> ;;   - Parent's read only page -previous page- is copied to a new writable page. 
   283                              <1> ;;   - Parent's PTE is updated as writable page, as unique page (AVL=0)
   284                              <1> ;;   - (Page fault handler whill check this PTE later, if child process causes to
   285                              <1> ;;     page fault due to write attempt on read only page. Of course, the previous 
   286                              <1> ;;     read only page will be converted to writable and unique page which belongs
   287                              <1> ;;     to child process.)	
   288                              <1> ;; WHEN CHILD TRIES TO WRITE IT'S READ ONLY (DUPLICATED) PAGE:
   289                              <1> ;; # Page fault handler will do those:
   290                              <1> ;;   - 'Duplicated PTE' flag (PTE bit 9) is checked (on the failed PTE).
   291                              <1> ;;   - If it is set, there is a parent uses -or was using- same page.
   292                              <1> ;;   - Same PTE address within parent's page table is checked if it has same page
   293                              <1> ;;     address or not. 
   294                              <1> ;;   - If parent's PTE has same address, child will continue with a new writable page.
   295                              <1> ;;     Parent's PTE will point to same (previous) page as writable, unique (AVL=0).	
   296                              <1> ;;   - If parent's PTE has different address, child will continue with it's 
   297                              <1> ;;     own/same page but read only flag (0) will be changed to writable flag (1) and
   298                              <1> ;;     'duplicated PTE (belongs to child)' flag/sign will be cleared/reset. 	  	
   299                              <1> ;; 
   300                              <1> ;; NOTE: When a child process is terminated, read only flags of parent's page tables
   301                              <1> ;;       will be set as writable (and unique) in case of child process was using 
   302                              <1> ;;       same pages with duplicated child PTE sign... Depending on sys fork and 
   303                              <1> ;;       duplication method details, it is not possible multiple child processes
   304                              <1> ;;       were using same page with duplicated PTEs.
   305                              <1> ;; 
   306                              <1> ;;************************************************************************************   
   307                              <1> 
   308                              <1> ;; 08/10/2014
   309                              <1> ;; 11/09/2014 - Retro UNIX 386 v1 PAGING (further) draft
   310                              <1> ;;		by Erdogan Tan (Based on KolibriOS 'memory.inc')
   311                              <1> 
   312                              <1> ;; 'allocate_page' code is derived and modified from KolibriOS
   313                              <1> ;; 'alloc_page' procedure in 'memory.inc' 
   314                              <1> ;; (25/08/2014, Revision: 5057) file 
   315                              <1> ;; by KolibriOS Team (2004-2012)
   316                              <1> 
   317                              <1> allocate_page:
   318                              <1> 	; 17/04/2021 - TRDOS 386 v2.0.4
   319                              <1> 	;	 (temporary modifications)
   320                              <1> 	; 01/07/2015
   321                              <1> 	; 05/05/2015
   322                              <1> 	; 30/04/2015
   323                              <1> 	; 16/10/2014
   324                              <1> 	; 08/10/2014
   325                              <1> 	; 09/09/2014 (Retro UNIX 386 v1 - beginning)
   326                              <1> 	;
   327                              <1> 	; INPUT -> none
   328                              <1> 	;
   329                              <1> 	; OUTPUT ->
   330                              <1> 	;	EAX = PHYSICAL (real/flat) ADDRESS OF THE ALLOCATED PAGE
   331                              <1> 	;	(corresponding MEMORY ALLOCATION TABLE bit is RESET)
   332                              <1> 	;
   333                              <1> 	;	CF = 1 and EAX = 0 
   334                              <1> 	; 		   if there is not a free page to be allocated	
   335                              <1> 	;
   336                              <1> 	; Modified Registers -> none (except EAX)
   337                              <1> 	;
   338 000056F3 A1[50770100]        <1> 	mov	eax, [free_pages]
   339 000056F8 21C0                <1> 	and	eax, eax
   340 000056FA 7438                <1> 	jz	short out_of_memory
   341                              <1> 	;
   342 000056FC 53                  <1> 	push	ebx
   343 000056FD 51                  <1> 	push	ecx
   344                              <1> 	;
   345 000056FE BB00001000          <1> 	mov	ebx, MEM_ALLOC_TBL   ; Memory Allocation Table offset
   346 00005703 89D9                <1> 	mov	ecx, ebx
   347                              <1>  				     ; NOTE: 32 (first_page) is initial
   348                              <1> 				     ; value of [next_page].
   349                              <1> 				     ; It points to the first available
   350                              <1> 				     ; page block for users (ring 3) ...	
   351                              <1> 				     ; (MAT offset 32 = 1024/32)	
   352                              <1> 				     ; (at the of the first 4 MB)		
   353 00005705 031D[54770100]      <1> 	add	ebx, [next_page] ; Free page searching starts from here
   354                              <1> 				 ; next_free_page >> 5
   355 0000570B 030D[58770100]      <1> 	add	ecx, [last_page] ; Free page searching ends here
   356                              <1> 				 ; (total_pages - 1) >> 5
   357                              <1> al_p_scan:
   358 00005711 39CB                <1> 	cmp	ebx, ecx
   359 00005713 770A                <1> 	ja	short al_p_notfound
   360                              <1> 	;
   361                              <1> 	; 01/07/2015
   362                              <1> 	; AMD64 Architecture Programmers Manual
   363                              <1> 	; Volume 3:
   364                              <1> 	; General-Purpose and System Instructions
   365                              <1> 	;
   366                              <1> 	; BSF - Bit Scan Forward
   367                              <1> 	;
   368                              <1> 	;   Searches the value in a register or a memory location
   369                              <1> 	;   (second operand) for the least-significant set bit. 
   370                              <1> 	;   If a set bit is found, the instruction clears the zero flag (ZF)
   371                              <1> 	;   and stores the index of the least-significant set bit in a destination
   372                              <1> 	;   register (first operand). If the second operand contains 0, 
   373                              <1> 	;   the instruction sets ZF to 1 and does not change the contents of the 
   374                              <1> 	;   destination register. The bit index is an unsigned offset from bit 0 
   375                              <1> 	;   of the searched value
   376                              <1> 	;
   377 00005715 0FBC03              <1> 	bsf	eax, [ebx] ; Scans source operand for first bit set (1).
   378                              <1> 			   ; Clear ZF if a bit is found set (1) and 
   379                              <1> 			   ; loads the destination with an index to
   380                              <1> 			   ; first set bit. (0 -> 31) 
   381                              <1> 			   ; Sets ZF to 1 if no bits are found set.
   382 00005718 751C                <1> 	jnz	short al_p_found ; ZF = 0 -> a free page has been found
   383                              <1> 			 ;
   384                              <1> 			 ; NOTE: a Memory Allocation Table bit 
   385                              <1> 			 ;	 with value of 1 means 
   386                              <1> 			 ;	 the corresponding page is free 
   387                              <1> 			 ;	 (Retro UNIX 386 v1 feature only!)
   388 0000571A 83C304              <1> 	add	ebx, 4
   389                              <1> 			 ; We return back for searching next page block
   390                              <1> 			 ; NOTE: [free_pages] is not ZERO; so, 
   391                              <1> 			 ;	 we always will find at least 1 free page here.
   392 0000571D EBF2                <1>         jmp     short al_p_scan
   393                              <1> 	;
   394                              <1> al_p_notfound:
   395 0000571F 81E900001000        <1> 	sub	ecx, MEM_ALLOC_TBL
   396 00005725 890D[54770100]      <1> 	mov	[next_page], ecx ; next/first free page = last page 
   397                              <1> 				 ; (deallocate_page procedure will change it)
   398 0000572B 31C0                <1> 	xor	eax, eax
   399 0000572D A3[50770100]        <1> 	mov	[free_pages], eax ; 0
   400 00005732 59                  <1> 	pop	ecx
   401 00005733 5B                  <1> 	pop	ebx
   402                              <1> 	;
   403                              <1> ; 17/04/2021
   404                              <1> ; ('swap_out' procedure call is disabled as temporary)
   405                              <1> 
   406                              <1> out_of_memory:
   407                              <1> ;	call	swap_out
   408                              <1> ;	jnc	short al_p_ok  ; [free_pages] = 0, re-allocation by swap_out
   409                              <1> ;	;
   410                              <1> ;	sub 	eax, eax ; 0
   411 00005734 F9                  <1> 	stc
   412 00005735 C3                  <1> 	retn
   413                              <1> 
   414                              <1> al_p_found:
   415 00005736 89D9                <1> 	mov	ecx, ebx
   416 00005738 81E900001000        <1> 	sub	ecx, MEM_ALLOC_TBL
   417 0000573E 890D[54770100]      <1> 	mov	[next_page], ecx ; Set first free page searching start
   418                              <1> 				 ; address/offset (to the next)
   419 00005744 FF0D[50770100]      <1>         dec     dword [free_pages] ; 1 page has been allocated (X = X-1) 
   420                              <1> 	;
   421 0000574A 0FB303              <1> 	btr	[ebx], eax	 ; The destination bit indexed by the source value
   422                              <1> 				 ; is copied into the Carry Flag and then cleared
   423                              <1> 				 ; in the destination.
   424                              <1> 				 ;
   425                              <1> 				 ; Reset the bit which is corresponding to the 
   426                              <1> 				 ; (just) allocated page.
   427                              <1> 	; 01/07/2015 (4*8 = 32, 1 allocation byte = 8 pages)	
   428 0000574D C1E103              <1> 	shl	ecx, 3		 ; (page block offset * 32) + page index
   429 00005750 01C8                <1> 	add	eax, ecx	 ; = page number
   430 00005752 C1E00C              <1> 	shl	eax, 12		 ; physical address of the page (flat/real value)
   431                              <1> 	; EAX = physical address of memory page
   432                              <1> 	;
   433                              <1> 	; NOTE: The relevant page directory and page table entry will be updated
   434                              <1> 	;       according to this EAX value...
   435 00005755 59                  <1> 	pop	ecx
   436 00005756 5B                  <1> 	pop	ebx
   437                              <1> al_p_ok:
   438 00005757 C3                  <1> 	retn
   439                              <1> 
   440                              <1> make_page_dir:
   441                              <1> 	; 18/04/2015
   442                              <1> 	; 12/04/2015
   443                              <1> 	; 23/10/2014
   444                              <1> 	; 16/10/2014
   445                              <1> 	; 09/10/2014 ; (Retro UNIX 386 v1 - beginning)
   446                              <1> 	;
   447                              <1> 	; INPUT ->
   448                              <1> 	;	none
   449                              <1> 	; OUTPUT ->
   450                              <1> 	;	(EAX = 0)
   451                              <1> 	;	cf = 1 -> insufficient (out of) memory error
   452                              <1> 	;	cf = 0 ->
   453                              <1> 	;	u.pgdir = page directory (physical) address of the current
   454                              <1> 	;		  process/user.
   455                              <1> 	;
   456                              <1> 	; Modified Registers -> EAX
   457                              <1> 	;
   458 00005758 E896FFFFFF          <1> 	call	allocate_page
   459 0000575D 7216                <1> 	jc	short mkpd_error
   460                              <1> 	;
   461 0000575F A3[74010300]        <1> 	mov	[u.pgdir], eax    ; Page dir address for current user/process
   462                              <1> 				  ; (Physical address)
   463                              <1> clear_page:
   464                              <1> 	; 18/04/2015
   465                              <1> 	; 09/10/2014 ; (Retro UNIX 386 v1 - beginning)
   466                              <1> 	;
   467                              <1> 	; INPUT ->
   468                              <1> 	;	EAX = physical address of the page
   469                              <1> 	; OUTPUT ->
   470                              <1> 	;	all bytes of the page will be cleared
   471                              <1> 	;
   472                              <1> 	; Modified Registers -> none
   473                              <1> 	;
   474 00005764 57                  <1> 	push	edi
   475 00005765 51                  <1> 	push	ecx
   476 00005766 50                  <1> 	push	eax
   477 00005767 B900040000          <1> 	mov	ecx, PAGE_SIZE / 4
   478 0000576C 89C7                <1> 	mov	edi, eax
   479 0000576E 31C0                <1> 	xor	eax, eax
   480 00005770 F3AB                <1> 	rep	stosd
   481 00005772 58                  <1> 	pop	eax
   482 00005773 59                  <1> 	pop	ecx
   483 00005774 5F                  <1> 	pop	edi
   484                              <1> mkpd_error:
   485                              <1> mkpt_error:
   486 00005775 C3                  <1> 	retn
   487                              <1> 
   488                              <1> make_page_table:
   489                              <1> 	; 23/06/2015
   490                              <1> 	; 18/04/2015
   491                              <1> 	; 12/04/2015
   492                              <1> 	; 16/10/2014
   493                              <1> 	; 09/10/2014 ; (Retro UNIX 386 v1 - beginning)
   494                              <1> 	;
   495                              <1> 	; INPUT ->
   496                              <1> 	;	EBX = virtual (linear) address
   497                              <1> 	;	ECX = page table attributes (lower 12 bits)
   498                              <1> 	;	      (higher 20 bits must be ZERO)
   499                              <1> 	;	      (bit 0 must be 1)	 
   500                              <1> 	;	u.pgdir = page directory (physical) address
   501                              <1> 	; OUTPUT ->
   502                              <1> 	;	EDX = Page directory entry address
   503                              <1> 	;	EAX = Page table address
   504                              <1> 	;	cf = 1 -> insufficient (out of) memory error
   505                              <1> 	;	cf = 0 -> page table address in the PDE (EDX)
   506                              <1> 	;
   507                              <1> 	; Modified Registers -> EAX, EDX
   508                              <1> 	;
   509 00005776 E878FFFFFF          <1> 	call	allocate_page
   510 0000577B 72F8                <1> 	jc	short mkpt_error
   511 0000577D E811000000          <1> 	call	set_pde	
   512 00005782 EBE0                <1> 	jmp	short clear_page
   513                              <1> 
   514                              <1> make_page:
   515                              <1> 	; 24/07/2015
   516                              <1> 	; 23/06/2015 ; (Retro UNIX 386 v1 - beginning)
   517                              <1> 	;
   518                              <1> 	; INPUT ->
   519                              <1> 	;	EBX = virtual (linear) address
   520                              <1> 	;	ECX = page attributes (lower 12 bits)
   521                              <1> 	;	      (higher 20 bits must be ZERO)
   522                              <1> 	;	      (bit 0 must be 1)	 
   523                              <1> 	;	u.pgdir = page directory (physical) address
   524                              <1> 	; OUTPUT ->
   525                              <1> 	;	EBX = Virtual address
   526                              <1> 	;	(EDX = PTE value)
   527                              <1> 	;	EAX = Physical address
   528                              <1> 	;	cf = 1 -> insufficient (out of) memory error
   529                              <1> 	;
   530                              <1> 	; Modified Registers -> EAX, EDX
   531                              <1> 	;
   532 00005784 E86AFFFFFF          <1> 	call	allocate_page
   533 00005789 7207                <1> 	jc	short mkp_err
   534 0000578B E821000000          <1> 	call	set_pte	
   535 00005790 73D2                <1> 	jnc	short clear_page ; 18/04/2015
   536                              <1> mkp_err:
   537 00005792 C3                  <1> 	retn
   538                              <1> 
   539                              <1> 
   540                              <1> set_pde:	; Set page directory entry (PDE)
   541                              <1> 	; 20/07/2015
   542                              <1> 	; 18/04/2015
   543                              <1> 	; 12/04/2015
   544                              <1> 	; 23/10/2014
   545                              <1> 	; 10/10/2014 ; (Retro UNIX 386 v1 - beginning)
   546                              <1> 	;
   547                              <1> 	; INPUT ->
   548                              <1> 	;	EAX = physical address
   549                              <1> 	;	      (use present value if EAX = 0)
   550                              <1> 	;	EBX = virtual (linear) address
   551                              <1> 	;	ECX = page table attributes (lower 12 bits)
   552                              <1> 	;	      (higher 20 bits must be ZERO)
   553                              <1> 	;	      (bit 0 must be 1)	 
   554                              <1> 	;	u.pgdir = page directory (physical) address
   555                              <1> 	; OUTPUT ->
   556                              <1> 	;	EDX = PDE address
   557                              <1> 	;	EAX = page table address (physical)
   558                              <1> 	;	;(CF=1 -> Invalid page address)
   559                              <1> 	;
   560                              <1> 	; Modified Registers -> EDX
   561                              <1> 	;
   562 00005793 89DA                <1> 	mov	edx, ebx
   563 00005795 C1EA16              <1> 	shr	edx, PAGE_D_SHIFT ; 22
   564 00005798 C1E202              <1> 	shl	edx, 2 ; offset to page directory (1024*4)
   565 0000579B 0315[74010300]      <1> 	add	edx, [u.pgdir]
   566                              <1> 	;
   567 000057A1 21C0                <1> 	and	eax, eax
   568 000057A3 7506                <1> 	jnz	short spde_1
   569                              <1> 	;
   570 000057A5 8B02                <1> 	mov	eax, [edx]  ; old PDE value
   571                              <1> 	;test	al, 1
   572                              <1> 	;jz	short spde_2
   573 000057A7 662500F0            <1> 	and	ax, PDE_A_CLEAR ; 0F000h  ; clear lower 12 bits
   574                              <1> spde_1:
   575                              <1> 	;and	cx, 0FFFh
   576 000057AB 8902                <1> 	mov	[edx], eax
   577 000057AD 66090A              <1> 	or	[edx], cx
   578 000057B0 C3                  <1> 	retn
   579                              <1> ;spde_2: ; error
   580                              <1> ;	stc
   581                              <1> ;	retn
   582                              <1> 
   583                              <1> set_pte:	; Set page table entry (PTE)
   584                              <1> 	; 24/07/2015
   585                              <1> 	; 20/07/2015
   586                              <1> 	; 23/06/2015
   587                              <1> 	; 18/04/2015
   588                              <1> 	; 12/04/2015
   589                              <1> 	; 10/10/2014 ; (Retro UNIX 386 v1 - beginning)
   590                              <1> 	;
   591                              <1> 	; INPUT ->
   592                              <1> 	;	EAX = physical page address
   593                              <1> 	;	      (use present value if EAX = 0)
   594                              <1> 	;	EBX = virtual (linear) address
   595                              <1> 	;	ECX = page attributes (lower 12 bits)
   596                              <1> 	;	      (higher 20 bits must be ZERO)
   597                              <1> 	;	      (bit 0 must be 1)	 
   598                              <1> 	;	u.pgdir = page directory (physical) address
   599                              <1> 	; OUTPUT ->
   600                              <1> 	;	EAX = physical page address
   601                              <1> 	;	(EDX = PTE value)
   602                              <1> 	;	EBX = virtual address
   603                              <1> 	;
   604                              <1> 	;	CF = 1 -> error
   605                              <1> 	;
   606                              <1> 	; Modified Registers -> EAX, EDX
   607                              <1> 	;
   608 000057B1 50                  <1> 	push	eax
   609 000057B2 A1[74010300]        <1> 	mov	eax, [u.pgdir] ; 20/07/2015
   610 000057B7 E837000000          <1> 	call 	get_pde
   611                              <1> 		; EDX = PDE address
   612                              <1> 		; EAX = PDE value
   613 000057BC 5A                  <1> 	pop	edx ; physical page address
   614 000057BD 722A                <1> 	jc	short spte_err ; PDE not present
   615                              <1> 	;
   616 000057BF 53                  <1> 	push	ebx ; 24/07/2015
   617 000057C0 662500F0            <1> 	and	ax, PDE_A_CLEAR ; 0F000h ; clear lower 12 bits
   618                              <1> 			    ; EDX = PT address (physical)	
   619 000057C4 C1EB0C              <1> 	shr	ebx, PAGE_SHIFT ; 12
   620 000057C7 81E3FF030000        <1> 	and	ebx, PTE_MASK	; 03FFh
   621                              <1> 			 ; clear higher 10 bits (PD bits)
   622 000057CD C1E302              <1> 	shl	ebx, 2   ; offset to page table (1024*4)
   623 000057D0 01C3                <1> 	add	ebx, eax
   624                              <1> 	;
   625 000057D2 8B03                <1> 	mov	eax, [ebx] ; Old PTE value
   626 000057D4 A801                <1> 	test	al, 1
   627 000057D6 740C                <1> 	jz	short spte_0
   628 000057D8 09D2                <1> 	or	edx, edx
   629 000057DA 750F                <1> 	jnz	short spte_1
   630 000057DC 662500F0            <1> 	and	ax, PTE_A_CLEAR ; 0F000h ; clear lower 12 bits
   631 000057E0 89C2                <1> 	mov	edx, eax
   632 000057E2 EB09                <1> 	jmp	short spte_2	
   633                              <1> spte_0:
   634                              <1> 	; If this PTE contains a swap (disk) address,
   635                              <1> 	; it can be updated by using 'swap_in' procedure
   636                              <1> 	; only!
   637 000057E4 21C0                <1> 	and	eax, eax
   638 000057E6 7403                <1> 	jz	short spte_1
   639                              <1> 	; 24/07/2015
   640                              <1> 	; swapped page ! (on disk)
   641 000057E8 5B                  <1> 	pop	ebx
   642                              <1> spte_err:
   643 000057E9 F9                  <1> 	stc
   644 000057EA C3                  <1> 	retn
   645                              <1> spte_1: 
   646 000057EB 89D0                <1> 	mov	eax, edx
   647                              <1> spte_2:
   648 000057ED 09CA                <1> 	or	edx, ecx
   649                              <1> 	; 23/06/2015
   650 000057EF 8913                <1> 	mov	[ebx], edx ; PTE value in EDX
   651                              <1> 	; 24/07/2015
   652 000057F1 5B                  <1> 	pop	ebx
   653 000057F2 C3                  <1> 	retn
   654                              <1> 
   655                              <1> get_pde:	; Get present value of the relevant PDE
   656                              <1> 	; 20/07/2015
   657                              <1> 	; 18/04/2015
   658                              <1> 	; 12/04/2015
   659                              <1> 	; 10/10/2014 ; (Retro UNIX 386 v1 - beginning)
   660                              <1> 	;
   661                              <1> 	; INPUT ->
   662                              <1> 	;	EBX = virtual (linear) address
   663                              <1> 	;	EAX = page directory (physical) address
   664                              <1> 	; OUTPUT ->
   665                              <1> 	;	EDX = Page directory entry address
   666                              <1> 	;	EAX = Page directory entry value
   667                              <1> 	;	CF = 1 -> PDE not present or invalid ? 
   668                              <1> 	; Modified Registers -> EDX, EAX
   669                              <1> 	;
   670 000057F3 89DA                <1> 	mov	edx, ebx
   671 000057F5 C1EA16              <1> 	shr	edx, PAGE_D_SHIFT ; 22  (12+10)
   672 000057F8 C1E202              <1> 	shl 	edx, 2 ; offset to page directory (1024*4)
   673 000057FB 01C2                <1> 	add	edx, eax ; page directory address (physical)
   674 000057FD 8B02                <1> 	mov	eax, [edx]
   675 000057FF A801                <1> 	test	al, PDE_A_PRESENT ; page table is present or not !
   676 00005801 751F                <1> 	jnz	short gpte_retn
   677 00005803 F9                  <1> 	stc
   678                              <1> gpde_retn:	
   679 00005804 C3                  <1> 	retn
   680                              <1> 
   681                              <1> get_pte:
   682                              <1> 		; Get present value of the relevant PTE
   683                              <1> 	; 29/07/2015
   684                              <1> 	; 20/07/2015
   685                              <1> 	; 18/04/2015
   686                              <1> 	; 12/04/2015
   687                              <1> 	; 10/10/2014 ; (Retro UNIX 386 v1 - beginning)
   688                              <1> 	;
   689                              <1> 	; INPUT ->
   690                              <1> 	;	EBX = virtual (linear) address
   691                              <1> 	;	EAX = page directory (physical) address
   692                              <1> 	; OUTPUT ->
   693                              <1> 	;	EDX = Page table entry address (if CF=0)
   694                              <1> 	;	      Page directory entry address (if CF=1)
   695                              <1> 	;            (Bit 0 value is 0 if PT is not present)
   696                              <1> 	;	EAX = Page table entry value (page address)
   697                              <1> 	;	CF = 1 -> PDE not present or invalid ? 
   698                              <1> 	; Modified Registers -> EAX, EDX
   699                              <1> 	;
   700 00005805 E8E9FFFFFF          <1> 	call 	get_pde
   701 0000580A 72F8                <1> 	jc	short gpde_retn	; page table is not present
   702                              <1> 	;jnc	short gpte_1
   703                              <1> 	;retn
   704                              <1> ;gpte_1:
   705 0000580C 662500F0            <1> 	and	ax, PDE_A_CLEAR ; 0F000h ; clear lower 12 bits
   706 00005810 89DA                <1> 	mov	edx, ebx
   707 00005812 C1EA0C              <1> 	shr	edx, PAGE_SHIFT ; 12
   708 00005815 81E2FF030000        <1> 	and	edx, PTE_MASK	; 03FFh
   709                              <1> 			 ; clear higher 10 bits (PD bits)
   710 0000581B C1E202              <1> 	shl	edx, 2 ; offset from start of page table (1024*4)
   711 0000581E 01C2                <1> 	add	edx, eax
   712 00005820 8B02                <1> 	mov	eax, [edx]
   713                              <1> gpte_retn:
   714 00005822 C3                  <1> 	retn
   715                              <1> 
   716                              <1> deallocate_page_dir:
   717                              <1> 	; 15/09/2015
   718                              <1> 	; 05/08/2015
   719                              <1> 	; 30/04/2015
   720                              <1> 	; 28/04/2015
   721                              <1> 	; 17/10/2014
   722                              <1> 	; 12/10/2014 (Retro UNIX 386 v1 - beginning)
   723                              <1> 	;
   724                              <1> 	; INPUT ->
   725                              <1> 	;	EAX = PHYSICAL ADDRESS OF THE PAGE DIRECTORY (CHILD)
   726                              <1> 	;	EBX = PHYSICAL ADDRESS OF THE PARENT'S PAGE DIRECTORY
   727                              <1> 	; OUTPUT ->
   728                              <1> 	;	All of page tables in the page directory
   729                              <1> 	;	and page dir's itself will be deallocated
   730                              <1> 	;	except 'read only' duplicated pages (will be converted
   731                              <1> 	;	to writable pages).
   732                              <1> 	;
   733                              <1> 	; Modified Registers -> EAX
   734                              <1> 	;
   735                              <1> 	;
   736 00005823 56                  <1> 	push	esi
   737 00005824 51                  <1> 	push	ecx
   738 00005825 50                  <1> 	push	eax
   739 00005826 89C6                <1> 	mov	esi, eax 
   740 00005828 31C9                <1> 	xor	ecx, ecx
   741                              <1> 	; The 1st PDE points to Kernel Page Table 0 (the 1st 4MB),
   742                              <1> 	; it must not be deallocated
   743 0000582A 890E                <1> 	mov	[esi], ecx ; 0 ; clear PDE 0
   744                              <1> dapd_0:
   745 0000582C AD                  <1> 	lodsd
   746 0000582D A801                <1> 	test	al, PDE_A_PRESENT ; bit 0, present flag (must be 1)
   747 0000582F 7409                <1> 	jz	short dapd_1	
   748 00005831 662500F0            <1> 	and	ax, PDE_A_CLEAR ; 0F000h ; clear lower 12 (attribute) bits
   749 00005835 E812000000          <1> 	call	deallocate_page_table			
   750                              <1> dapd_1:
   751 0000583A 41                  <1> 	inc	ecx ; page directory entry index
   752 0000583B 81F900040000        <1> 	cmp	ecx, PAGE_SIZE / 4 ; 1024
   753 00005841 72E9                <1> 	jb	short dapd_0
   754                              <1> dapd_2:
   755 00005843 58                  <1> 	pop	eax
   756 00005844 E869000000          <1> 	call	deallocate_page	; deallocate the page dir's itself
   757 00005849 59                  <1> 	pop	ecx
   758 0000584A 5E                  <1> 	pop	esi
   759 0000584B C3                  <1> 	retn
   760                              <1> 
   761                              <1> deallocate_page_table:
   762                              <1> 	; 29/08/2023 - TRDOS 386 v2.0.6
   763                              <1> 	; 17/04/2021 - TRDOS 386 v2.0.4
   764                              <1> 	;	 (temporary modifications)
   765                              <1> 	; 12/07/2016
   766                              <1> 	; 19/09/2015
   767                              <1> 	; 15/09/2015
   768                              <1> 	; 05/08/2015
   769                              <1> 	; 30/04/2015
   770                              <1> 	; 28/04/2015
   771                              <1> 	; 24/10/2014
   772                              <1> 	; 23/10/2014
   773                              <1> 	; 12/10/2014 (Retro UNIX 386 v1 - beginning)
   774                              <1> 	;
   775                              <1> 	; INPUT ->
   776                              <1> 	;	EAX = PHYSICAL (real/flat) ADDRESS OF THE PAGE TABLE
   777                              <1> 	;	EBX = PHYSICAL ADDRESS OF THE PARENT'S PAGE DIRECTORY
   778                              <1> 	;	(ECX = page directory entry index)
   779                              <1> 	; OUTPUT ->
   780                              <1> 	;	All of pages in the page table and page table's itself
   781                              <1> 	;	will be deallocated except 'read only' duplicated pages
   782                              <1> 	;	(will be converted to writable pages).
   783                              <1> 	;
   784                              <1> 	; Modified Registers -> EAX
   785                              <1> 	;
   786 0000584C 56                  <1> 	push	esi
   787 0000584D 57                  <1> 	push	edi
   788 0000584E 52                  <1> 	push	edx
   789 0000584F 50                  <1> 	push	eax ; *
   790 00005850 89C6                <1> 	mov	esi, eax 
   791 00005852 31FF                <1> 	xor	edi, edi ; 0
   792                              <1> dapt_0:
   793 00005854 AD                  <1> 	lodsd
   794 00005855 A801                <1> 	test	al, PTE_A_PRESENT ; bit 0, present flag (must be 1)
   795 00005857 744C                <1> 	jz	short dapt_1
   796                              <1> 	;
   797 00005859 A802                <1> 	test	al, PTE_A_WRITE   ; bit 1, writable (r/w) flag
   798                              <1> 				  ; (must be 1)
   799 0000585B 753D                <1> 	jnz	short dapt_3
   800                              <1> 	; Read only -duplicated- page (belongs to a parent or a child)
   801 0000585D 66A90002            <1>         test    ax, PTE_DUPLICATED ; Was this page duplicated 
   802                              <1> 				   ; as child's page ?
   803 00005861 7442                <1> 	jz	short dapt_4 ; Clear PTE but don't deallocate the page!
   804                              <1> 	; check the parent's PTE value is read only & same page or not.. 
   805                              <1> 	; ECX = page directory entry index (0-1023)
   806 00005863 53                  <1> 	push	ebx
   807 00005864 51                  <1> 	push	ecx
   808                              <1> 	;shl	cx, 2 ; *4
   809                              <1> 	; 29/08/2023
   810 00005865 C1E102              <1> 	shl	ecx, 2
   811 00005868 01CB                <1> 	add	ebx, ecx ; PDE offset (for the parent)
   812 0000586A 8B0B                <1> 	mov	ecx, [ebx]
   813 0000586C F6C101              <1> 	test	cl, PDE_A_PRESENT ; present (valid) or not ?
   814 0000586F 7427                <1> 	jz	short dapt_2	; parent process does not use this page
   815 00005871 6681E100F0          <1> 	and	cx, PDE_A_CLEAR ; 0F000h ; Clear attribute bits
   816                              <1> 	; EDI = page table entry index (0-1023)
   817 00005876 89FA                <1> 	mov	edx, edi 
   818                              <1> 	;shl	dx, 2 ; *4
   819                              <1> 	; 29/08/2023
   820 00005878 C1E202              <1> 	shl	edx, 2
   821 0000587B 01CA                <1> 	add	edx, ecx ; PTE offset (for the parent)
   822 0000587D 8B1A                <1> 	mov	ebx, [edx]
   823 0000587F F6C301              <1> 	test	bl, PTE_A_PRESENT ; present or not ?
   824 00005882 7414                <1> 	jz	short dapt_2	; parent process does not use this page
   825 00005884 662500F0            <1> 	and	ax, PTE_A_CLEAR ; 0F000h ; Clear attribute bits 
   826 00005888 6681E300F0          <1> 	and	bx, PTE_A_CLEAR ; 0F000h ; Clear attribute bits
   827 0000588D 39D8                <1> 	cmp	eax, ebx	; parent's and child's pages are same ?
   828 0000588F 7507                <1> 	jne	short dapt_2	; not same page
   829                              <1> 				; deallocate the child's page
   830 00005891 800A02              <1>         or      byte [edx], PTE_A_WRITE ; convert to writable page (parent)
   831 00005894 59                  <1> 	pop	ecx
   832 00005895 5B                  <1> 	pop	ebx
   833 00005896 EB0D                <1> 	jmp	short dapt_4
   834                              <1> 
   835                              <1> ; 17/04/2021
   836                              <1> ; ('dapt_1' is disabled as temporary)
   837                              <1> ;
   838                              <1> ;dapt_1:
   839                              <1> ;	or	eax, eax	; swapped page ?
   840                              <1> ;	jz	short dapt_5	; no
   841                              <1> ;				; yes
   842                              <1> ;	shr	eax, 1
   843                              <1> ;	call	unlink_swap_block ; Deallocate swapped page block
   844                              <1> ;				  ; on the swap disk (or in file)
   845                              <1> ;	jmp	short dapt_5
   846                              <1> dapt_2:
   847 00005898 59                  <1> 	pop	ecx
   848 00005899 5B                  <1> 	pop	ebx
   849                              <1> dapt_3:	
   850                              <1> 	; 12/07/2016
   851 0000589A 66A90004            <1> 	test	ax, PTE_SHARED ; shared or direct memory access indicator
   852 0000589E 7505                <1> 	jnz	short dapt_4   ; AVL bit 1 = 1, do not deallocate this page!
   853                              <1> 	;
   854                              <1> 	;and	ax, PTE_A_CLEAR ; 0F000h ; clear lower 12 (attribute) bits
   855 000058A0 E80D000000          <1> 	call	deallocate_page ; set the mem allocation bit of this page
   856                              <1> dapt_4:
   857                              <1> 	; 20/10/2023
   858                              <1> 	; PTE clearing here was/is not necessary
   859                              <1> 	; because this page table is being deallocated
   860                              <1> 	; and it's PTEs will be ineffective.
   861                              <1> 
   862                              <1> 	;mov	dword [esi-4], 0 ; clear/reset PTE (child, dupl. as parent)
   863                              <1> 
   864                              <1> dapt_1:	; 17/04/2021 (temporary)
   865                              <1> dapt_5:
   866 000058A5 47                  <1> 	inc	edi ; page table entry index
   867 000058A6 81FF00040000        <1> 	cmp	edi, PAGE_SIZE / 4 ; 1024
   868 000058AC 72A6                <1> 	jb	short dapt_0
   869                              <1> 	;
   870 000058AE 58                  <1> 	pop	eax ; *
   871 000058AF 5A                  <1> 	pop	edx
   872 000058B0 5F                  <1> 	pop	edi	
   873 000058B1 5E                  <1> 	pop	esi
   874                              <1> 	;
   875                              <1> 	;call	deallocate_page	; deallocate the page table's itself
   876                              <1> 	;retn
   877                              <1> 
   878                              <1> deallocate_page:
   879                              <1> 	; 15/09/2015
   880                              <1> 	; 28/04/2015
   881                              <1> 	; 10/03/2015
   882                              <1> 	; 17/10/2014
   883                              <1> 	; 12/10/2014 (Retro UNIX 386 v1 - beginning)
   884                              <1> 	;
   885                              <1> 	; INPUT -> 
   886                              <1> 	;	EAX = PHYSICAL (real/flat) ADDRESS OF THE ALLOCATED PAGE
   887                              <1> 	; OUTPUT ->
   888                              <1> 	;	[free_pages] is increased
   889                              <1> 	;	(corresponding MEMORY ALLOCATION TABLE bit is SET)
   890                              <1> 	;	CF = 1 if the page is already deallocated
   891                              <1> 	; 	       (or not allocated) before.  
   892                              <1> 	;
   893                              <1> 	; Modified Registers -> EAX
   894                              <1> 	;
   895 000058B2 53                  <1> 	push	ebx
   896 000058B3 52                  <1> 	push	edx
   897                              <1> 	;
   898 000058B4 C1E80C              <1> 	shr	eax, PAGE_SHIFT      ; shift physical address to 
   899                              <1> 				     ; 12 bits right
   900                              <1> 				     ; to get page number
   901 000058B7 89C2                <1> 	mov	edx, eax
   902                              <1> 	; 15/09/2015
   903 000058B9 C1EA03              <1> 	shr	edx, 3		     ; to get offset to M.A.T.
   904                              <1> 				     ; (1 allocation bit = 1 page)
   905                              <1> 				     ; (1 allocation bytes = 8 pages)
   906 000058BC 80E2FC              <1> 	and	dl, 0FCh 	     ; clear lower 2 bits
   907                              <1> 				     ; (to get 32 bit position)			
   908                              <1> 	;
   909 000058BF BB00001000          <1> 	mov	ebx, MEM_ALLOC_TBL   ; Memory Allocation Table address
   910 000058C4 01D3                <1> 	add	ebx, edx
   911 000058C6 83E01F              <1> 	and	eax, 1Fh	     ; lower 5 bits only
   912                              <1> 				     ; (allocation bit position)	 
   913 000058C9 3B15[54770100]      <1> 	cmp 	edx, [next_page]     ; is the new free page address lower
   914                              <1> 				     ; than the address in 'next_page' ?
   915                              <1> 				     ; (next/first free page value)		
   916 000058CF 7306                <1> 	jnb	short dap_1	     ; no	
   917 000058D1 8915[54770100]      <1> 	mov	[next_page], edx     ; yes
   918                              <1> dap_1:
   919 000058D7 0FAB03              <1> 	bts	[ebx], eax	     ; unlink/release/deallocate page
   920                              <1> 				     ; set relevant bit to 1.
   921                              <1> 				     ; set CF to the previous bit value	
   922                              <1> 	;cmc			     ; complement carry flag	
   923                              <1> 	;jc	short dap_2	     ; do not increase free_pages count
   924                              <1> 				     ; if the page is already deallocated
   925                              <1> 				     ; before.	
   926 000058DA FF05[50770100]      <1>         inc     dword [free_pages]
   927                              <1> dap_2:
   928 000058E0 5A                  <1> 	pop	edx
   929 000058E1 5B                  <1> 	pop	ebx
   930 000058E2 C3                  <1> 	retn
   931                              <1> 
   932                              <1> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   933                              <1> ;;                                                              ;;
   934                              <1> ;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;;
   935                              <1> ;; Distributed under terms of the GNU General Public License    ;;
   936                              <1> ;;                                                              ;;
   937                              <1> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   938                              <1> 
   939                              <1> ;;$Revision: 5057 $
   940                              <1> 
   941                              <1> 
   942                              <1> ;;align 4
   943                              <1> ;;proc alloc_page
   944                              <1> 
   945                              <1> ;;        pushfd
   946                              <1> ;;        cli
   947                              <1> ;;        push    ebx
   948                              <1> ;;;//-
   949                              <1> ;;        cmp     [pg_data.pages_free], 1
   950                              <1> ;;        jle     .out_of_memory
   951                              <1> ;;;//-
   952                              <1> ;;
   953                              <1> ;;        mov     ebx, [page_start]
   954                              <1> ;;        mov     ecx, [page_end]
   955                              <1> ;;.l1:
   956                              <1> ;;        bsf     eax, [ebx];
   957                              <1> ;;        jnz     .found
   958                              <1> ;;        add     ebx, 4
   959                              <1> ;;        cmp     ebx, ecx
   960                              <1> ;;        jb      .l1
   961                              <1> ;;        pop     ebx
   962                              <1> ;;        popfd
   963                              <1> ;;        xor     eax, eax
   964                              <1> ;;        ret
   965                              <1> ;;.found:
   966                              <1> ;;;//-
   967                              <1> ;;        dec     [pg_data.pages_free]
   968                              <1> ;;        jz      .out_of_memory
   969                              <1> ;;;//-
   970                              <1> ;;        btr     [ebx], eax
   971                              <1> ;;        mov     [page_start], ebx
   972                              <1> ;;        sub     ebx, sys_pgmap
   973                              <1> ;;        lea     eax, [eax+ebx*8]
   974                              <1> ;;        shl     eax, 12
   975                              <1> ;;;//-       dec [pg_data.pages_free]
   976                              <1> ;;        pop     ebx
   977                              <1> ;;        popfd
   978                              <1> ;;        ret
   979                              <1> ;;;//-
   980                              <1> ;;.out_of_memory:
   981                              <1> ;;        mov     [pg_data.pages_free], 1
   982                              <1> ;;        xor     eax, eax
   983                              <1> ;;        pop     ebx
   984                              <1> ;;        popfd
   985                              <1> ;;        ret
   986                              <1> ;;;//-
   987                              <1> ;;endp
   988                              <1> 
   989                              <1> duplicate_page_dir:
   990                              <1> 	; 21/09/2015
   991                              <1> 	; 31/08/2015
   992                              <1> 	; 20/07/2015
   993                              <1> 	; 28/04/2015
   994                              <1> 	; 27/04/2015
   995                              <1> 	; 18/04/2015
   996                              <1> 	; 12/04/2015
   997                              <1> 	; 18/10/2014
   998                              <1> 	; 16/10/2014 (Retro UNIX 386 v1 - beginning)
   999                              <1> 	;
  1000                              <1> 	; INPUT -> 
  1001                              <1> 	;	[u.pgdir] = PHYSICAL (real/flat) ADDRESS of the parent's
  1002                              <1> 	;		    page directory.
  1003                              <1> 	; OUTPUT ->
  1004                              <1> 	;	EAX =  PHYSICAL (real/flat) ADDRESS of the child's
  1005                              <1> 	;	       page directory.
  1006                              <1> 	;	(New page directory with new page table entries.)
  1007                              <1> 	;	(New page tables with read only copies of the parent's
  1008                              <1> 	;	pages.)
  1009                              <1> 	;	EAX = 0 -> Error (CF = 1)
  1010                              <1> 	;
  1011                              <1> 	; Modified Registers -> none (except EAX)
  1012                              <1> 	;
  1013 000058E3 E80BFEFFFF          <1> 	call	allocate_page
  1014 000058E8 723E                <1> 	jc	short dpd_err
  1015                              <1> 	;
  1016 000058EA 55                  <1> 	push	ebp ; 20/07/2015
  1017 000058EB 56                  <1> 	push	esi
  1018 000058EC 57                  <1> 	push	edi
  1019 000058ED 53                  <1> 	push	ebx
  1020 000058EE 51                  <1> 	push	ecx
  1021 000058EF 8B35[74010300]      <1> 	mov	esi, [u.pgdir]
  1022 000058F5 89C7                <1> 	mov	edi, eax
  1023 000058F7 50                  <1> 	push	eax ; save child's page directory address
  1024                              <1> 	; 31/08/2015
  1025                              <1> 	; copy PDE 0 from the parent's page dir to the child's page dir
  1026                              <1> 	; (use same system space for all user page tables) 
  1027 000058F8 A5                  <1> 	movsd
  1028 000058F9 BD00004000          <1> 	mov	ebp, 1024*4096 ; pass the 1st 4MB (system space)
  1029 000058FE B9FF030000          <1> 	mov	ecx, (PAGE_SIZE / 4) - 1 ; 1023
  1030                              <1> dpd_0:	
  1031 00005903 AD                  <1> 	lodsd
  1032                              <1> 	;or	eax, eax
  1033                              <1>         ;jnz     short dpd_1
  1034 00005904 A801                <1> 	test	al, PDE_A_PRESENT ;  bit 0 =  1
  1035 00005906 7508                <1> 	jnz	short dpd_1
  1036                              <1>  	; 20/07/2015 (virtual address at the end of the page table)	
  1037 00005908 81C500004000        <1> 	add	ebp, 1024*4096 ; page size * PTE count
  1038 0000590E EB0F                <1> 	jmp	short dpd_2
  1039                              <1> dpd_1:	
  1040 00005910 662500F0            <1> 	and	ax, PDE_A_CLEAR ; 0F000h ; clear attribute bits
  1041 00005914 89C3                <1> 	mov	ebx, eax
  1042                              <1> 	; EBX = Parent's page table address
  1043 00005916 E81F000000          <1> 	call	duplicate_page_table
  1044 0000591B 720C                <1> 	jc	short dpd_p_err
  1045                              <1> 	; EAX = Child's page table address
  1046 0000591D 0C07                <1> 	or	al, PDE_A_PRESENT + PDE_A_WRITE + PDE_A_USER
  1047                              <1> 			 ; set bit 0, bit 1 and bit 2 to 1
  1048                              <1> 			 ; (present, writable, user)
  1049                              <1> dpd_2:
  1050 0000591F AB                  <1> 	stosd
  1051 00005920 E2E1                <1> 	loop	dpd_0
  1052                              <1> 	;
  1053 00005922 58                  <1> 	pop	eax  ; restore child's page directory address
  1054                              <1> dpd_3:
  1055 00005923 59                  <1> 	pop	ecx
  1056 00005924 5B                  <1> 	pop	ebx
  1057 00005925 5F                  <1> 	pop	edi
  1058 00005926 5E                  <1> 	pop	esi
  1059 00005927 5D                  <1> 	pop	ebp ; 20/07/2015
  1060                              <1> dpd_err:
  1061 00005928 C3                  <1> 	retn
  1062                              <1> dpd_p_err:
  1063                              <1> 	; release the allocated pages missing (recover free space)
  1064 00005929 58                  <1> 	pop	eax  ; the new page directory address (physical)
  1065 0000592A 8B1D[74010300]      <1> 	mov	ebx, [u.pgdir] ; parent's page directory address 
  1066 00005930 E8EEFEFFFF          <1> 	call 	deallocate_page_dir
  1067 00005935 29C0                <1> 	sub	eax, eax ; 0
  1068 00005937 F9                  <1> 	stc
  1069 00005938 EBE9                <1> 	jmp	short dpd_3	
  1070                              <1> 
  1071                              <1> duplicate_page_table:
  1072                              <1> 	; 17/04/2021 - TRDOS 386 v2.0.4
  1073                              <1> 	;	 (temporary modifications)
  1074                              <1> 	; 20/02/2017
  1075                              <1> 	; 21/09/2015
  1076                              <1> 	; 20/07/2015
  1077                              <1> 	; 05/05/2015
  1078                              <1> 	; 28/04/2015
  1079                              <1> 	; 27/04/2015
  1080                              <1> 	; 18/04/2015
  1081                              <1> 	; 18/10/2014
  1082                              <1> 	; 16/10/2014 (Retro UNIX 386 v1 - beginning)
  1083                              <1> 	;
  1084                              <1> 	; INPUT -> 
  1085                              <1> 	;	EBX = PHYSICAL (real/flat) ADDRESS of the parent's page table.
  1086                              <1> 	;       20/02/2017		 
  1087                              <1> 	;	EBP = Linear address of the page (from 'duplicate_page_dir')
  1088                              <1> 	;	      (Linear address = CORE + user's virtual address) 	
  1089                              <1> 	; OUTPUT ->
  1090                              <1> 	;	EAX = PHYSICAL (real/flat) ADDRESS of the child's page table.
  1091                              <1> 	;	      (with 'read only' attribute of page table entries)
  1092                              <1> 	;	20/02/2017
  1093                              <1> 	;	EBP = Next linear page address (for 'duplicate_page_dir')
  1094                              <1> 	;	
  1095                              <1> 	;	CF = 1 -> error 
  1096                              <1> 	;
  1097                              <1> 	; Modified Registers -> EBP (except EAX)
  1098                              <1> 	;
  1099 0000593A E8B4FDFFFF          <1> 	call	allocate_page
  1100 0000593F 7258                <1> 	jc	short dpt_err
  1101                              <1> 	;
  1102 00005941 50                  <1> 	push	eax ; *
  1103 00005942 56                  <1> 	push	esi
  1104 00005943 57                  <1> 	push	edi
  1105 00005944 52                  <1> 	push	edx
  1106 00005945 51                  <1> 	push	ecx
  1107                              <1> 	;
  1108 00005946 89DE                <1> 	mov	esi, ebx
  1109 00005948 89C7                <1> 	mov	edi, eax
  1110 0000594A 89C2                <1> 	mov	edx, eax
  1111 0000594C 81C200100000        <1> 	add	edx, PAGE_SIZE 	
  1112                              <1> dpt_0:
  1113 00005952 AD                  <1> 	lodsd
  1114 00005953 21C0                <1> 	and	eax, eax
  1115 00005955 7432                <1> 	jz	short dpt_3
  1116 00005957 A801                <1> 	test	al, PTE_A_PRESENT ;  bit 0 =  1
  1117                              <1> 	; 17/04/2021 (temporary)
  1118                              <1> 	;jnz	short dpt_1
  1119 00005959 7439                <1> 	jz	short dpt_p_err
  1120                              <1> 
  1121                              <1> ; 17/04/2021
  1122                              <1> ; ('reload_page' procedure call is disabled as temporary)
  1123                              <1> ;
  1124                              <1> ;	; 20/07/2015
  1125                              <1> ;	; ebp = virtual (linear) address of the memory page
  1126                              <1> ;	call	reload_page ; 28/04/2015
  1127                              <1> ;	jc	short dpt_p_err
  1128                              <1> dpt_1:
  1129                              <1> 	; 21/09/2015
  1130 0000595B 89C1                <1> 	mov	ecx, eax
  1131 0000595D 662500F0            <1> 	and	ax, PTE_A_CLEAR ; 0F000h ; clear attribute bits
  1132 00005961 F6C102              <1> 	test	cl, PTE_A_WRITE ; writable page ?
  1133 00005964 751A                <1> 	jnz	short dpt_2
  1134                              <1> 	; Read only (parent) page
  1135                              <1> 	; 	- there is a third process which uses this page -
  1136                              <1> 	; Allocate a new page for the child process
  1137 00005966 E888FDFFFF          <1> 	call	allocate_page
  1138 0000596B 7227                <1> 	jc	short dpt_p_err
  1139 0000596D 57                  <1> 	push	edi
  1140 0000596E 56                  <1> 	push	esi
  1141 0000596F 89CE                <1> 	mov	esi, ecx
  1142 00005971 89C7                <1> 	mov	edi, eax
  1143 00005973 B900040000          <1> 	mov	ecx, PAGE_SIZE/4
  1144 00005978 F3A5                <1> 	rep	movsd	; copy page (4096 bytes)
  1145 0000597A 5E                  <1> 	pop	esi
  1146 0000597B 5F                  <1> 	pop	edi
  1147                              <1> 	;
  1148                              <1> 
  1149                              <1> ; 17/04/2021
  1150                              <1> ; ('add_to_swap_queue' procedure call is disabled as temporary)
  1151                              <1> ; 
  1152                              <1> ;	push	ebx
  1153                              <1> ;	push	eax
  1154                              <1> ;	; 20/07/2015
  1155                              <1> ;	mov	ebx, ebp
  1156                              <1> ;	; ebx = virtual (linear) address of the memory page
  1157                              <1> ;	call	add_to_swap_queue
  1158                              <1> ;	pop	eax
  1159                              <1> ;	pop	ebx
  1160                              <1> 
  1161                              <1> 	; 21/09/2015
  1162 0000597C 0C07                <1> 	or	al, PTE_A_USER+PTE_A_WRITE+PTE_A_PRESENT 
  1163                              <1> 		; user + writable + present page
  1164 0000597E EB09                <1> 	jmp	short dpt_3
  1165                              <1> dpt_2:
  1166                              <1> 	;or	ax, PTE_A_USER+PTE_A_PRESENT 
  1167 00005980 0C05                <1> 	or	al, PTE_A_USER+PTE_A_PRESENT 
  1168                              <1> 		    ; (read only page!)
  1169 00005982 8946FC              <1> 	mov	[esi-4], eax ; update parent's PTE
  1170 00005985 660D0002            <1> 	or      ax, PTE_DUPLICATED  ; (read only page & duplicated PTE!)
  1171                              <1> dpt_3:
  1172 00005989 AB                  <1> 	stosd  ; EDI points to child's PTE  	 
  1173                              <1> 	;
  1174 0000598A 81C500100000        <1> 	add	ebp, 4096 ; 20/07/2015 (next page)
  1175                              <1> 	;
  1176 00005990 39D7                <1> 	cmp	edi, edx
  1177 00005992 72BE                <1> 	jb	short dpt_0
  1178                              <1> dpt_p_err:
  1179 00005994 59                  <1> 	pop	ecx
  1180 00005995 5A                  <1> 	pop	edx
  1181 00005996 5F                  <1> 	pop	edi
  1182 00005997 5E                  <1> 	pop	esi
  1183 00005998 58                  <1> 	pop	eax ; *
  1184                              <1> dpt_err:
  1185 00005999 C3                  <1> 	retn
  1186                              <1> 
  1187                              <1> page_fault_handler:	; CPU EXCEPTION 0Eh (14) : Page Fault !
  1188                              <1> 	; 29/11/2023 - TRDOS 386 v2.0.7
  1189                              <1> 	; 17/04/2021 - TRDOS 386 v2.0.4
  1190                              <1> 	;	 (temporary modifications)
  1191                              <1> 	; 21/09/2015
  1192                              <1> 	; 19/09/2015
  1193                              <1> 	; 17/09/2015
  1194                              <1> 	; 28/08/2015
  1195                              <1> 	; 20/07/2015
  1196                              <1> 	; 28/06/2015
  1197                              <1> 	; 03/05/2015
  1198                              <1> 	; 30/04/2015
  1199                              <1> 	; 18/04/2015
  1200                              <1> 	; 12/04/2015
  1201                              <1> 	; 30/10/2014
  1202                              <1> 	; 11/09/2014
  1203                              <1> 	; 10/09/2014 (Retro UNIX 386 v1 - beginning)
  1204                              <1> 	;
  1205                              <1> 	; Note: This is not an interrupt/exception handler.
  1206                              <1> 	;	This is a 'page fault remedy' subroutine 
  1207                              <1> 	;	which will be called by standard/uniform
  1208                              <1> 	;	exception handler.
  1209                              <1> 	;
  1210                              <1> 	; INPUT -> 
  1211                              <1> 	;	[error_code] = 32 bit ERROR CODE (lower 5 bits are valid)
  1212                              <1> 	;
  1213                              <1> 	;	cr2 = the virtual (linear) address 
  1214                              <1> 	;	      which has caused to page fault (19/09/2015)
  1215                              <1> 	;
  1216                              <1> 	; OUTPUT ->
  1217                              <1> 	;	(corresponding PAGE TABLE ENTRY is mapped/set)
  1218                              <1> 	;	EAX = 0 -> no error
  1219                              <1> 	;	EAX > 0 -> error code in EAX (also CF = 1)
  1220                              <1> 	;
  1221                              <1> 	; Modified Registers -> none (except EAX)
  1222                              <1> 	;	
  1223                              <1>         ;
  1224                              <1>         ; ERROR CODE:
  1225                              <1> 	;	 31  .....	4   3	2   1	0
  1226                              <1> 	;	+---+-- --+---+---+---+---+---+---+
  1227                              <1> 	;	|   Reserved  | I | R | U | W | P |
  1228                              <1> 	;	+---+-- --+---+---+---+---+---+---+
  1229                              <1> 	;
  1230                              <1> 	; P : PRESENT -	When set, the page fault was caused by 
  1231                              <1>     	;		a page-protection violation. When not set,
  1232                              <1> 	;		it was caused by a non-present page.
  1233                              <1> 	; W : WRITE   -	When set, the page fault was caused by
  1234                              <1> 	;		a page write. When not set, it was caused
  1235                              <1> 	;		by a page read.
  1236                              <1> 	; U : USER    -	When set, the page fault was caused 
  1237                              <1> 	;		while CPL = 3. 
  1238                              <1> 	;		This does not necessarily mean that
  1239                              <1> 	;		the page fault was a privilege violation.
  1240                              <1> 	; R : RESERVD -	When set, the page fault was caused by
  1241                              <1> 	;     WRITE	reading a 1 in a reserved field.
  1242                              <1> 	; I : INSTRUC -	When set, the page fault was caused by
  1243                              <1> 	;     FETCH	an instruction fetch
  1244                              <1> 	;
  1245                              <1> 	;; x86 (32 bit) VIRTUAL ADDRESS TRANSLATION
  1246                              <1> 	;  31               22                  12 11                    0
  1247                              <1> 	; +-------------------+-------------------+-----------------------+
  1248                              <1>        	; | PAGE DIR. ENTRY # | PAGE TAB. ENTRY # |        OFFSET         |
  1249                              <1>        	; +-------------------+-------------------+-----------------------+
  1250                              <1> 	;
  1251                              <1> 
  1252                              <1> 	;; CR3 REGISTER (Control Register 3)
  1253                              <1> 	;  31                                   12             5 4 3 2   0
  1254                              <1> 	; +---------------------------------------+-------------+---+-----+
  1255                              <1>       	; |                                       |  		|P|P|     |
  1256                              <1>       	; |   PAGE DIRECTORY TABLE BASE ADDRESS   |  reserved	|C|W|rsvrd|
  1257                              <1>       	; |                                       | 		|D|T|     |
  1258                              <1>    	; +---------------------------------------+-------------+---+-----+
  1259                              <1> 	;
  1260                              <1> 	;	PWT    - WRITE THROUGH
  1261                              <1> 	;	PCD    - CACHE DISABLE		
  1262                              <1> 	;
  1263                              <1> 	;
  1264                              <1> 	;; x86 PAGE DIRECTORY ENTRY (4 KByte Page)
  1265                              <1> 	;  31                                   12 11  9 8 7 6 5 4 3 2 1 0
  1266                              <1> 	; +---------------------------------------+-----+---+-+-+---+-+-+-+
  1267                              <1>       	; |                                       |     | | | | |P|P|U|R| |
  1268                              <1>       	; |     PAGE TABLE BASE ADDRESS 31..12    | AVL |G|0|D|A|C|W|/|/|P|
  1269                              <1>       	; |                                       |     | | | | |D|T|S|W| |
  1270                              <1>    	; +---------------------------------------+-----+---+-+-+---+-+-+-+
  1271                              <1> 	;
  1272                              <1>         ;       P      - PRESENT
  1273                              <1>         ;       R/W    - READ/WRITE
  1274                              <1>         ;       U/S    - USER/SUPERVISOR
  1275                              <1> 	;	PWT    - WRITE THROUGH
  1276                              <1> 	;	PCD    - CACHE DISABLE	
  1277                              <1> 	;	A      - ACCESSED	
  1278                              <1>         ;       D      - DIRTY (IGNORED)
  1279                              <1> 	;	PAT    - PAGE ATTRIBUTE TABLE INDEX (CACHE BEHAVIOR)
  1280                              <1> 	;	G      - GLOBAL	(IGNORED) 
  1281                              <1>         ;       AVL    - AVAILABLE FOR SYSTEMS PROGRAMMER USE
  1282                              <1> 	;
  1283                              <1> 	;
  1284                              <1> 	;; x86 PAGE TABLE ENTRY (4 KByte Page)
  1285                              <1> 	;  31                                   12 11  9 8 7 6 5 4 3 2 1 0
  1286                              <1> 	; +---------------------------------------+-----+---+-+-+---+-+-+-+
  1287                              <1>       	; |                                       |     | |P| | |P|P|U|R| |
  1288                              <1>       	; |     PAGE FRAME BASE ADDRESS 31..12    | AVL |G|A|D|A|C|W|/|/|P|
  1289                              <1>       	; |                                       |     | |T| | |D|T|S|W| |
  1290                              <1>    	; +---------------------------------------+-----+---+-+-+---+-+-+-+
  1291                              <1> 	;
  1292                              <1>         ;       P      - PRESENT
  1293                              <1>         ;       R/W    - READ/WRITE
  1294                              <1>         ;       U/S    - USER/SUPERVISOR
  1295                              <1> 	;	PWT    - WRITE THROUGH
  1296                              <1> 	;	PCD    - CACHE DISABLE	
  1297                              <1> 	;	A      - ACCESSED	
  1298                              <1>         ;       D      - DIRTY
  1299                              <1> 	;	PAT    - PAGE ATTRIBUTE TABLE INDEX (CACHE BEHAVIOR)
  1300                              <1> 	;	G      - GLOBAL	 
  1301                              <1>         ;       AVL    - AVAILABLE FOR SYSTEMS PROGRAMMER USE
  1302                              <1> 	;
  1303                              <1> 	;
  1304                              <1> 	;; 80386 PAGE TABLE ENTRY (4 KByte Page)
  1305                              <1> 	;  31                                   12 11  9 8 7 6 5 4 3 2 1 0
  1306                              <1> 	; +---------------------------------------+-----+-+-+-+-+---+-+-+-+
  1307                              <1>       	; |                                       |     | | | | | | |U|R| |
  1308                              <1>       	; |     PAGE FRAME BASE ADDRESS 31..12    | AVL |0|0|D|A|0|0|/|/|P|
  1309                              <1>       	; |                                       |     | | | | | | |S|W| |
  1310                              <1>       	; +---------------------------------------+-----+-+-+-+-+---+-+-+-+
  1311                              <1> 	;
  1312                              <1>         ;       P      - PRESENT
  1313                              <1>         ;       R/W    - READ/WRITE
  1314                              <1>         ;       U/S    - USER/SUPERVISOR
  1315                              <1>         ;       D      - DIRTY
  1316                              <1>         ;       AVL    - AVAILABLE FOR SYSTEMS PROGRAMMER USE
  1317                              <1> 	;
  1318                              <1>         ;       NOTE: 0 INDICATES INTEL RESERVED. DO NOT DEFINE.
  1319                              <1> 	;
  1320                              <1> 	;
  1321                              <1> 	;; Invalid Page Table Entry
  1322                              <1> 	; 31                                                           1 0
  1323                              <1>       	; +-------------------------------------------------------------+-+
  1324                              <1>       	; |                                                             | |
  1325                              <1>       	; |                          AVAILABLE                          |0|
  1326                              <1>       	; |                                                             | |
  1327                              <1>       	; +-------------------------------------------------------------+-+
  1328                              <1> 	;
  1329                              <1> 
  1330 0000599A 53                  <1> 	push	ebx
  1331 0000599B 52                  <1> 	push	edx
  1332 0000599C 51                  <1> 	push	ecx
  1333                              <1> 	;
  1334                              <1> 	; 21/09/2015 (debugging)
  1335 0000599D FF05[88010300]      <1> 	inc	dword [u.pfcount] ; page fault count for running process
  1336 000059A3 FF05[34030300]      <1> 	inc	dword [PF_Count] ; total page fault count	
  1337                              <1> 	; 28/06/2015
  1338                              <1> 	;mov	edx, [error_code] ; Lower 5 bits are valid
  1339 000059A9 8A15[2C030300]      <1> 	mov	dl, [error_code]
  1340                              <1> 	;
  1341 000059AF F6C201              <1> 	test	dl, 1	; page fault was caused by a non-present page
  1342                              <1> 			; sign
  1343 000059B2 7425                <1> 	jz	short pfh_alloc_np
  1344                              <1> 	; 
  1345                              <1> 	; If it is not a 'write on read only page' type page fault
  1346                              <1> 	; major page fault error with minor reason must be returned without 
  1347                              <1> 	; fixing the problem. 'sys_exit with error' will be needed
  1348                              <1> 	; after return here!
  1349                              <1> 	; Page fault will be remedied, by copying page contents
  1350                              <1> 	; to newly allocated page with write permission;
  1351                              <1> 	; sys_fork -> sys_exec -> copy on write, demand paging method is 
  1352                              <1> 	; used for working with minimum possible memory usage. 
  1353                              <1> 	; sys_fork will duplicate page directory and tables of parent  
  1354                              <1> 	; process with 'read only' flag. If the child process attempts to
  1355                              <1> 	; write on these read only pages, page fault will be directed here
  1356                              <1> 	; for allocating a new page with same data/content. 
  1357                              <1> 	;
  1358                              <1> 	; IMPORTANT : Retro UNIX 386 v1 (and SINGLIX and TR-DOS)
  1359                              <1> 	; will not force to separate CODE and DATA space 
  1360                              <1> 	; in a process/program... 
  1361                              <1> 	; CODE segment/section may contain DATA!
  1362                              <1> 	; It is flat, smoth and simplest programming method already as in 
  1363                              <1> 	; Retro UNIX 8086 v1 and MS-DOS programs.
  1364                              <1> 	;	
  1365 000059B4 F6C202              <1> 	test	dl, 2	; page fault was caused by a page write
  1366                              <1> 			; sign
  1367 000059B7 7418                <1>         jz      short pfh_p_err
  1368                              <1> 	; 31/08/2015
  1369 000059B9 F6C204              <1> 	test	dl, 4	; page fault was caused while CPL = 3 (user mode)
  1370                              <1> 			; sign.  (U+W+P = 4+2+1 = 7)
  1371 000059BC 7413                <1>         jz	short pfh_pv_err
  1372                              <1> 	;
  1373                              <1> 	; make a new page and copy the parent's page content
  1374                              <1> 	; as the child's new page content
  1375                              <1> 	;
  1376 000059BE 0F20D3              <1> 	mov	ebx, cr2 ; CR2 contains the linear address 
  1377                              <1> 			 ; which has caused to page fault
  1378 000059C1 E87C000000          <1> 	call 	copy_page
  1379 000059C6 7202                <1>         jc	short pfh_im_err ; insufficient memory
  1380                              <1> 	;
  1381 000059C8 EB72                <1>         jmp     pfh_cpp_ok
  1382                              <1> 
  1383                              <1> 	; 29/11/2023
  1384                              <1> pfh_im_err:
  1385 000059CA B8E4000000          <1> 	mov	eax, ERR_MAJOR_PF + ERR_MINOR_IM ; Error code in AX
  1386                              <1> 			; Major (Primary) Error: Page Fault
  1387                              <1> 			; Minor (Secondary) Error: Insufficient Memory !
  1388 000059CF EB6D                <1> 	jmp	short pfh_err_retn
  1389                              <1> 
  1390                              <1> 	; 29/11/2023
  1391                              <1> pfh_p_err: ; 09/03/2015
  1392                              <1> pfh_pv_err:
  1393                              <1> 	; Page fault was caused by a protection-violation
  1394 000059D1 B8E6000000          <1> 	mov	eax, ERR_MAJOR_PF + ERR_MINOR_PV ; Error code in AX
  1395                              <1> 			; Major (Primary) Error: Page Fault
  1396                              <1> 			; Minor (Secondary) Error: Protection violation !
  1397 000059D6 F9                  <1> 	stc
  1398 000059D7 EB65                <1> 	jmp	short pfh_err_retn
  1399                              <1> 
  1400                              <1> pfh_alloc_np:
  1401 000059D9 E815FDFFFF          <1> 	call	allocate_page	; (allocate a new page)
  1402 000059DE 72EA                <1>         jc      pfh_im_err	; 'insufficient memory' error
  1403                              <1> pfh_chk_cpl:
  1404                              <1> 	; EAX = Physical (base) address of the allocated (new) page
  1405                              <1> 		; (Lower 12 bits are ZERO, because 
  1406                              <1> 		;	the address is on a page boundary)
  1407 000059E0 80E204              <1> 	and	dl, 4	; CPL = 3 ?
  1408 000059E3 7505                <1> 	jnz	short pfh_um
  1409                              <1> 			; Page fault handler for kernel/system mode (CPL=0)		
  1410 000059E5 0F20DB              <1> 	mov	ebx, cr3 ; CR3 (Control Register 3) contains physical address
  1411                              <1> 			 ; of the current/active page directory
  1412                              <1> 			 ; (Always kernel/system mode page directory, here!)
  1413                              <1> 			 ; Note: Lower 12 bits are 0. (page boundary)
  1414 000059E8 EB06                <1> 	jmp	short pfh_get_pde
  1415                              <1> 	;
  1416                              <1> pfh_um:			; Page fault handler for user/appl. mode (CPL=3)
  1417 000059EA 8B1D[74010300]      <1>  	mov	ebx, [u.pgdir] ; Page directory of current/active process
  1418                              <1> 			; Physical address of the USER's page directory
  1419                              <1> 			; Note: Lower 12 bits are 0. (page boundary)
  1420                              <1> pfh_get_pde:
  1421 000059F0 80CA03              <1> 	or	dl, 3	; USER + WRITE + PRESENT or SYSTEM + WRITE + PRESENT
  1422 000059F3 0F20D1              <1> 	mov	ecx, cr2 ; CR2 contains the virtual address 
  1423                              <1> 			 ; which has been caused to page fault
  1424                              <1> 			 ;
  1425 000059F6 C1E914              <1> 	shr	ecx, 20	 ; shift 20 bits right
  1426 000059F9 80E1FC              <1> 	and	cl, 0FCh ; mask lower 2 bits to get PDE offset		
  1427                              <1> 	;
  1428 000059FC 01CB                <1> 	add	ebx, ecx ; now, EBX points to the relevant page dir entry 
  1429 000059FE 8B0B                <1> 	mov	ecx, [ebx] ; physical (base) address of the page table 	
  1430 00005A00 F6C101              <1> 	test	cl, 1	 ; check bit 0 is set (1) or not (0).
  1431 00005A03 740B                <1> 	jz	short pfh_set_pde ; Page directory entry is not valid,
  1432                              <1> 			  	  ; set/validate page directory entry
  1433 00005A05 6681E100F0          <1> 	and	cx, PDE_A_CLEAR ; 0F000h ; Clear attribute bits
  1434 00005A0A 89CB                <1> 	mov	ebx, ecx ; Physical address of the page table
  1435 00005A0C 89C1                <1> 	mov	ecx, eax ; new page address (physical) 	
  1436 00005A0E EB16                <1> 	jmp	short pfh_get_pte
  1437                              <1> pfh_set_pde:
  1438                              <1> 	;; NOTE: Page directories and page tables never be swapped out!
  1439                              <1> 	;;	 (So, we know this PDE is empty or invalid)
  1440                              <1> 	;
  1441 00005A10 08D0                <1> 	or	al, dl	 ; lower 3 bits are used as U/S, R/W, P flags
  1442 00005A12 8903                <1> 	mov	[ebx], eax ; Let's put the new page directory entry here !
  1443 00005A14 30C0                <1> 	xor	al, al	 ; clear lower (3..8) bits
  1444 00005A16 89C3                <1> 	mov	ebx, eax
  1445 00005A18 E8D6FCFFFF          <1> 	call	allocate_page	 ; (allocate a new page)
  1446 00005A1D 72AB                <1> 	jc	short pfh_im_err   ; 'insufficient memory' error
  1447                              <1> pfh_spde_1:
  1448                              <1> 	; EAX = Physical (base) address of the allocated (new) page
  1449 00005A1F 89C1                <1> 	mov	ecx, eax
  1450 00005A21 E83EFDFFFF          <1> 	call	clear_page ; Clear page content
  1451                              <1> pfh_get_pte:
  1452 00005A26 0F20D0              <1> 	mov	eax, cr2 ; virtual address
  1453                              <1> 			 ; which has been caused to page fault
  1454 00005A29 89C7                <1> 	mov	edi, eax ; 20/07/2015
  1455 00005A2B C1E80C              <1> 	shr	eax, 12	 ; shift 12 bit right to get 
  1456                              <1> 			 ; higher 20 bits of the page fault address 
  1457 00005A2E 25FF030000          <1> 	and	eax, 3FFh ; mask PDE# bits, the result is PTE# (0 to 1023)
  1458 00005A33 C1E002              <1> 	shl	eax, 2	; shift 2 bits left to get PTE offset
  1459 00005A36 01C3                <1> 	add	ebx, eax ; now, EBX points to the relevant page table entry 
  1460                              <1> ; 17/04/2021 temporary
  1461                              <1> ;	mov	eax, [ebx] ; get previous value of pte
  1462                              <1> ;		; bit 0 of EAX is always 0 (otherwise we would not be here)
  1463                              <1> 
  1464                              <1> ; 17/04/2021
  1465                              <1> ; ('swap_in' procedure call has been disabled as temporary)
  1466                              <1> ;
  1467                              <1> ;	and	eax, eax
  1468                              <1> ;	jz	short pfh_gpte_1
  1469                              <1> ;	; 20/07/2015
  1470                              <1> ;	xchg	ebx, ecx ; new page address (physical)
  1471                              <1> ;	push	ebp ; 20/07/2015
  1472                              <1> ;	mov	ebp, cr2
  1473                              <1> ;		; ECX = physical address of the page table entry
  1474                              <1> ;		; EBX = Memory page address (physical!)
  1475                              <1> ;		; EAX = Swap disk (offset) address
  1476                              <1> ;		; EBP = virtual address (page fault address)
  1477                              <1> ;	call	swap_in
  1478                              <1> ;	pop	ebp
  1479                              <1> ;	jc      short pfh_err_retn
  1480                              <1> ;	xchg	ecx, ebx
  1481                              <1> ;		; EBX = physical address of the page table entry
  1482                              <1> ;		; ECX = new page
  1483                              <1> pfh_gpte_1:
  1484 00005A38 08D1                <1> 	or	cl, dl	; lower 3 bits are used as U/S, R/W, P flags
  1485 00005A3A 890B                <1> 	mov	[ebx], ecx ; Let's put the new page table entry here !
  1486                              <1> pfh_cpp_ok:
  1487                              <1> ; 17/04/2021
  1488                              <1> ; ('add_to_swap_queue' procedure call has been disabled as temporary)
  1489                              <1> ;
  1490                              <1> ;	; 20/07/2015
  1491                              <1> ;	mov	ebx, cr2
  1492                              <1> ;	call 	add_to_swap_queue
  1493                              <1> 	;
  1494                              <1> 	; The new PTE (which contains the new page) will be added to 
  1495                              <1> 	; the swap queue, here. 
  1496                              <1> 	; (Later, if memory will become insufficient, 
  1497                              <1> 	; one page will be swapped out which is at the head of 
  1498                              <1> 	; the swap queue by using FIFO and access check methods.)
  1499                              <1> 	;
  1500 00005A3C 31C0                <1> 	xor	eax, eax  ; 0
  1501                              <1> 	;
  1502                              <1> pfh_err_retn:
  1503 00005A3E 59                  <1> 	pop	ecx
  1504 00005A3F 5A                  <1> 	pop	edx
  1505 00005A40 5B                  <1> 	pop	ebx
  1506 00005A41 C3                  <1> 	retn 
  1507                              <1> 	
  1508                              <1> copy_page:
  1509                              <1> 	; 29/08/2023 (TRDOS 386 v2.0.6)
  1510                              <1> 	; 22/09/2015
  1511                              <1> 	; 21/09/2015
  1512                              <1> 	; 19/09/2015
  1513                              <1> 	; 07/09/2015
  1514                              <1> 	; 31/08/2015
  1515                              <1> 	; 20/07/2015
  1516                              <1> 	; 05/05/2015
  1517                              <1> 	; 03/05/2015
  1518                              <1> 	; 18/04/2015
  1519                              <1> 	; 12/04/2015
  1520                              <1> 	; 30/10/2014
  1521                              <1> 	; 18/10/2014 (Retro UNIX 386 v1 - beginning)
  1522                              <1> 	;
  1523                              <1> 	; INPUT -> 
  1524                              <1> 	;	EBX = Virtual (linear) address of source page
  1525                              <1> 	;	     (Page fault address)
  1526                              <1> 	; OUTPUT ->
  1527                              <1> 	;	EAX = PHYSICAL (real/flat) ADDRESS OF THE ALLOCATED PAGE
  1528                              <1> 	;	(corresponding PAGE TABLE ENTRY is mapped/set)
  1529                              <1> 	;	EAX = 0 (CF = 1) 
  1530                              <1> 	;		if there is not a free page to be allocated
  1531                              <1> 	;	(page content of the source page will be copied
  1532                              <1> 	;	onto the target/new page) 	
  1533                              <1> 	;
  1534                              <1> 	; Modified Registers -> ecx, ebx (except EAX)
  1535                              <1> 	;	
  1536 00005A42 56                  <1> 	push	esi
  1537 00005A43 57                  <1> 	push	edi
  1538                              <1> 	;push	ebx
  1539                              <1> 	;push	ecx
  1540 00005A44 31F6                <1> 	xor 	esi, esi
  1541 00005A46 C1EB0C              <1> 	shr	ebx, 12 ; shift 12 bits right to get PDE & PTE numbers
  1542 00005A49 89D9                <1> 	mov	ecx, ebx ; save page fault address (as 12 bit shifted)
  1543 00005A4B C1EB08              <1> 	shr	ebx, 8	 ; shift 8 bits right and then
  1544 00005A4E 80E3FC              <1> 	and	bl, 0FCh ; mask lower 2 bits to get PDE offset	
  1545 00005A51 89DF                <1> 	mov 	edi, ebx ; save it for the parent of current process
  1546 00005A53 031D[74010300]      <1> 	add	ebx, [u.pgdir] ; EBX points to the relevant page dir entry 
  1547 00005A59 8B03                <1> 	mov	eax, [ebx] ; physical (base) address of the page table
  1548 00005A5B 662500F0            <1> 	and	ax, PTE_A_CLEAR ; 0F000h ; clear attribute bits 	
  1549 00005A5F 89CB                <1> 	mov	ebx, ecx   ; (restore higher 20 bits of page fault address)
  1550 00005A61 81E3FF030000        <1> 	and	ebx, 3FFh  ; mask PDE# bits, the result is PTE# (0 to 1023)
  1551                              <1> 	;shl	bx, 2	   ; shift 2 bits left to get PTE offset
  1552                              <1> 	; 29/08/2023
  1553 00005A67 C1E302              <1> 	shl	ebx, 2
  1554 00005A6A 01C3                <1> 	add	ebx, eax   ; EBX points to the relevant page table entry 
  1555                              <1> 	; 07/09/2015
  1556 00005A6C 66F7030002          <1>         test    word [ebx], PTE_DUPLICATED ; (Does current process share this
  1557                              <1> 				     ; read only page as a child process?)	
  1558 00005A71 7509                <1> 	jnz	short cpp_0 ; yes
  1559 00005A73 8B0B                <1> 	mov	ecx, [ebx] ; PTE value
  1560 00005A75 6681E100F0          <1> 	and	cx, PTE_A_CLEAR ; 0F000h  ; clear page attributes
  1561 00005A7A EB31                <1> 	jmp	short cpp_1
  1562                              <1> cpp_0:
  1563 00005A7C 89FE                <1> 	mov	esi, edi
  1564 00005A7E 0335[78010300]      <1> 	add	esi, [u.ppgdir] ; the parent's page directory entry
  1565 00005A84 8B06                <1> 	mov	eax, [esi] ; physical (base) address of the page table
  1566 00005A86 662500F0            <1> 	and	ax, PTE_A_CLEAR ; 0F000h ; clear attribute bits
  1567 00005A8A 89CE                <1> 	mov	esi, ecx   ; (restore higher 20 bits of page fault address)	
  1568 00005A8C 81E6FF030000        <1> 	and	esi, 3FFh  ; mask PDE# bits, the result is PTE# (0 to 1023)
  1569                              <1> 	;shl	si, 2	   ; shift 2 bits left to get PTE offset
  1570                              <1> 	; 29/08/2023
  1571 00005A92 C1E602              <1> 	shl	esi, 2
  1572 00005A95 01C6                <1> 	add	esi, eax   ; EDX points to the relevant page table entry  	
  1573 00005A97 8B0E                <1> 	mov	ecx, [esi] ; PTE value of the parent process
  1574                              <1> 	; 21/09/2015
  1575 00005A99 8B03                <1> 	mov	eax, [ebx] ; PTE value of the child process
  1576 00005A9B 662500F0            <1> 	and	ax, PTE_A_CLEAR ; 0F000h ; clear page attributes	
  1577                              <1> 	;
  1578 00005A9F F6C101              <1> 	test	cl, PTE_A_PRESENT ; is it a present/valid page ?
  1579 00005AA2 7424                <1> 	jz	short cpp_3 ; the parent's page is not same page  	
  1580                              <1> 	;
  1581 00005AA4 6681E100F0          <1> 	and	cx, PTE_A_CLEAR ; 0F000h ; clear page attributes
  1582 00005AA9 39C8                <1> 	cmp	eax, ecx   ; Same page?	
  1583 00005AAB 751B                <1> 	jne	short cpp_3 ; Parent page and child page are not same 
  1584                              <1> 			    ; Convert child's page to writable page
  1585                              <1> cpp_1:
  1586 00005AAD E841FCFFFF          <1> 	call	allocate_page
  1587 00005AB2 721A                <1> 	jc	short cpp_4 ; 'insufficient memory' error
  1588 00005AB4 21F6                <1> 	and	esi, esi    ; check ESI is valid or not
  1589 00005AB6 7405                <1> 	jz	short cpp_2
  1590                              <1> 		; Convert read only page to writable page 
  1591                              <1> 		;(for the parent of the current process)
  1592                              <1> 	;and	word [esi], PTE_A_CLEAR ; 0F000h
  1593                              <1> 	; 22/09/2015
  1594 00005AB8 890E                <1> 	mov	[esi], ecx
  1595 00005ABA 800E07              <1> 	or	byte [esi], PTE_A_PRESENT + PTE_A_WRITE + PTE_A_USER
  1596                              <1> 				 ; 1+2+4 = 7
  1597                              <1> cpp_2:
  1598 00005ABD 89C7                <1> 	mov	edi, eax ; new page address of the child process
  1599                              <1> 	; 07/09/2015
  1600 00005ABF 89CE                <1> 	mov	esi, ecx ; the page address of the parent process
  1601 00005AC1 B900040000          <1> 	mov	ecx, PAGE_SIZE / 4
  1602 00005AC6 F3A5                <1> 	rep	movsd ; 31/08/2015
  1603                              <1> cpp_3:		
  1604 00005AC8 0C07                <1> 	or	al, PTE_A_PRESENT + PTE_A_WRITE + PTE_A_USER ; 1+2+4 = 7
  1605 00005ACA 8903                <1> 	mov	[ebx], eax ; Update PTE
  1606 00005ACC 28C0                <1> 	sub	al, al ; clear attributes
  1607                              <1> cpp_4:
  1608                              <1> 	;pop	ecx
  1609                              <1> 	;pop	ebx
  1610 00005ACE 5F                  <1> 	pop	edi
  1611 00005ACF 5E                  <1> 	pop	esi
  1612 00005AD0 C3                  <1> 	retn
  1613                              <1> 
  1614                              <1> ;; 28/04/2015
  1615                              <1> ;; 24/10/2014
  1616                              <1> ;; 21/10/2014 (Retro UNIX 386 v1 - beginning)
  1617                              <1> ;; SWAP_PAGE_QUEUE (4096 bytes)
  1618                              <1> ;;
  1619                              <1> ;;   0000   0001   0002   0003   ....   1020   1021   1022   1023	
  1620                              <1> ;; +------+------+------+------+-    -+------+------+------+------+
  1621                              <1> ;; |  pg1 |  pg2 |  pg3 |  pg4 | .... |pg1021|pg1022|pg1023|pg1024|
  1622                              <1> ;; +------+------+------+------+-    -+------+------+------+------+    
  1623                              <1> ;;
  1624                              <1> ;; [swpq_last] = 0 to 4096 (step 4) -> the last position on the queue
  1625                              <1> ;;
  1626                              <1> ;; Method:
  1627                              <1> ;;	Swap page queue is a list of allocated pages with physical
  1628                              <1> ;;	addresses (system mode virtual adresses = physical addresses).
  1629                              <1> ;;	It is used for 'swap_in' and 'swap_out' procedures.
  1630                              <1> ;;	When a new page is being allocated, swap queue is updated
  1631                              <1> ;;	by 'swap_queue_shift' procedure, header of the queue (offset 0)
  1632                              <1> ;;	is checked for 'accessed' flag. If the 1st page on the queue
  1633                              <1> ;;	is 'accessed' or 'read only', it is dropped from the list;
  1634                              <1> ;;	other pages from the 2nd to the last (in [swpq_last]) shifted
  1635                              <1> ;; 	to head then the 2nd page becomes the 1st and '[swpq_last]' 
  1636                              <1> ;;	offset value becomes it's previous offset value - 4.
  1637                              <1> ;;	If the 1st page of the swap page queue is not 'accessed'	
  1638                              <1> ;;	the queue/list is not shifted.
  1639                              <1> ;;	After the queue/list shift, newly allocated page is added
  1640                              <1> ;;	to the tail of the queue at the [swpq_count*4] position.
  1641                              <1> ;;	But, if [swpq_count] > 1023, the newly allocated page
  1642                              <1> ;;	will not be added to the tail of swap page queue.  		 
  1643                              <1> ;;	
  1644                              <1> ;;	During 'swap_out' procedure, swap page queue is checked for
  1645                              <1> ;;	the first non-accessed, writable page in the list, 
  1646                              <1> ;;	from the head to the tail. The list is shifted to left 
  1647                              <1> ;;	(to the head) till a non-accessed page will be found in the list.
  1648                              <1> ;;	Then, this page	is swapped out (to disk) and then it is dropped
  1649                              <1> ;;	from the list by a final swap queue shift. [swpq_count] value
  1650                              <1> ;;	is changed. If all pages on the queue' are 'accessed', 
  1651                              <1> ;;	'insufficient memory' error will be returned ('swap_out' 
  1652                              <1> ;;	procedure will be failed)...
  1653                              <1> ;;
  1654                              <1> ;;	Note: If the 1st page of the queue is an 'accessed' page,
  1655                              <1> ;;	'accessed' flag of the page will be reset (0) and that page
  1656                              <1> ;;	(PTE) will be added to the tail of the queue after
  1657                              <1> ;;	the check, if [swpq_count] < 1023. If [swpq_count] = 1024
  1658                              <1> ;;	the queue will be rotated and the PTE in the head will be
  1659                              <1> ;;	added to the tail after resetting 'accessed' bit. 
  1660                              <1> ;;
  1661                              <1> ;;
  1662                              <1> ;;	
  1663                              <1> ;; SWAP DISK/FILE (with 4096 bytes swapped page blocks)
  1664                              <1> ;;
  1665                              <1> ;;  00000000  00000004  00000008  0000000C   ...   size-8    size-4
  1666                              <1> ;; +---------+---------+---------+---------+-- --+---------+---------+
  1667                              <1> ;; |descriptr| page(1) | page(2) | page(3) | ... |page(n-1)| page(n) |
  1668                              <1> ;; +---------+---------+---------+---------+-- --+---------+---------+    
  1669                              <1> ;;
  1670                              <1> ;; [swpd_next] = the first free block address in swapped page records
  1671                              <1> ;;    		 for next free block search by 'swap_out' procedure.
  1672                              <1> ;; [swpd_size] = swap disk/file size in sectors (512 bytes)
  1673                              <1> ;;		 NOTE: max. possible swap disk size is 1024 GB
  1674                              <1> ;; 		 (entire swap space must be accessed by using
  1675                              <1> ;;		 31 bit offset address) 
  1676                              <1> ;; [swpd_free] = free block (4096 bytes) count in swap disk/file space
  1677                              <1> ;; [swpd_start] = absolute/start address of the swap disk/file
  1678                              <1> ;;		  0 for file, or beginning sector of the swap partition
  1679                              <1> ;; [swp_drv] = logical drive description table addr. of swap disk/file
  1680                              <1> ;;
  1681                              <1> ;; 					
  1682                              <1> ;; Method:
  1683                              <1> ;;	When the memory (ram) becomes insufficient, page allocation
  1684                              <1> ;;	procedure swaps out a page from memory to the swap disk 
  1685                              <1> ;;	(partition) or swap file to get a new free page at the memory.
  1686                              <1> ;;	Swapping out is performed by using swap page queue.
  1687                              <1> ;;
  1688                              <1> ;; 	Allocation block size of swap disk/file is equal to page size
  1689                              <1> ;;	(4096 bytes). Swapping address (in sectors) is recorded
  1690                              <1> ;;	into relevant page file entry as 31 bit physical (logical)
  1691                              <1> ;;	offset address as 1 bit shifted to left for present flag (0).
  1692                              <1> ;;	Swapped page address is between 1 and swap disk/file size - 4.	  
  1693                              <1> ;;	Absolute physical (logical) address of the swapped page is 
  1694                              <1> ;;	calculated by adding offset value to the swap partition's 
  1695                              <1> ;;	start address. If the swap device (disk) is a virtual disk 
  1696                              <1> ;;	or it is a file, start address of the swap disk/volume is 0, 
  1697                              <1> ;;	and offset value is equal to absolute (physical or logical)
  1698                              <1> ;;	address/position. (It has not to be ZERO if the swap partition 
  1699                              <1> ;;	is in a partitioned virtual hard disk.) 
  1700                              <1> ;;
  1701                              <1> ;;	Note: Swap addresses are always specified/declared in sectors, 
  1702                              <1> ;;	not in bytes or	in blocks/zones/clusters (4096 bytes) as unit.
  1703                              <1> ;;
  1704                              <1> ;;	Swap disk/file allocation is mapped via 'Swap Allocation Table'
  1705                              <1> ;;	at memory as similar to 'Memory Allocation Table'.
  1706                              <1> ;;
  1707                              <1> ;;	Every bit of Swap Allocation Table repsesents one swap block
  1708                              <1> ;;	(equal to page size) respectively. Bit 0 of the S.A.T. byte 0
  1709                              <1> ;;	is reserved for swap disk/file block 0 as descriptor block
  1710                              <1> ;;	(also for compatibility with PTE). If bit value is ZERO,
  1711                              <1> ;;	it means relevant (respective) block is in use, and, 
  1712                              <1> ;;	of course, if bit value is 1, it means relevant (respective)
  1713                              <1> ;;      swap disk/file block is free.
  1714                              <1> ;;	For example: bit 1 of the byte 128 repsesents block 1025 
  1715                              <1> ;;	(128*8+1) or sector (offset) 8200 on the swap disk or
  1716                              <1> ;;	byte (offset/position) 4198400 in the swap file. 
  1717                              <1> ;;	4GB swap space is represented via 128KB Swap Allocation Table.
  1718                              <1> ;;	Initial layout of Swap Allocation Table is as follows:
  1719                              <1> ;;	------------------------------------------------------------
  1720                              <1> ;;	0111111111111111111111111 .... 11111111111111111111111111111
  1721                              <1> ;;	------------------------------------------------------------
  1722                              <1> ;;	(0 is reserved block, 1s represent free blocks respectively.)
  1723                              <1> ;;	(Note: Allocation cell/unit of the table is bit, not byte)
  1724                              <1> ;;
  1725                              <1> ;;	..............................................................
  1726                              <1> ;;
  1727                              <1> ;;	'swap_out' procedure checks 'free_swap_blocks' count at first,
  1728                              <1> ;;	then it searches Swap Allocation Table if free count is not
  1729                              <1> ;;	zero. From begining the [swpd_next] dword value, the first bit 
  1730                              <1> ;;	position with value of 1 on the table is converted to swap
  1731                              <1> ;;	disk/file offset address, in sectors (not 4096 bytes block).
  1732                              <1> ;;	'ldrv_write' procedure is called with ldrv (logical drive
  1733                              <1> ;;	number of physical swap disk or virtual swap disk)
  1734                              <1> ;;	number, sector offset (not absolute sector -LBA- number),
  1735                              <1> ;;	and sector count (8, 512*8 = 4096) and buffer adress
  1736                              <1> ;;	(memory page). That will be a direct disk write procedure.
  1737                              <1> ;;	(for preventing late memory allocation, significant waiting). 
  1738                              <1> ;;	If disk write procedure returns with error or free count of 
  1739                              <1> ;;	swap blocks is ZERO, 'swap_out' procedure will return with
  1740                              <1> ;;	'insufficient memory error' (cf=1). 
  1741                              <1> ;;
  1742                              <1> ;;	(Note: Even if free swap disk/file blocks was not zero,
  1743                              <1> ;;	any disk write error will not be fixed by 'swap_out' procedure,
  1744                              <1> ;;	in other words, 'swap_out' will not check the table for other
  1745                              <1> ;;	free blocks after a disk write error. It will return to 
  1746                              <1> ;;	the caller with error (CF=1) which means swapping is failed. 
  1747                              <1> ;;
  1748                              <1> ;;	After writing the page on to swap disk/file address/sector,
  1749                              <1> ;;	'swap_out' procesure returns with that swap (offset) sector
  1750                              <1> ;;	address (cf=0). 
  1751                              <1> ;;
  1752                              <1> ;;	..............................................................
  1753                              <1> ;;
  1754                              <1> ;;	'swap_in' procedure loads addressed (relevant) swap disk or
  1755                              <1> ;;	file sectors at specified memory page. Then page allocation
  1756                              <1> ;;	procedure updates relevant page table entry with 'present' 
  1757                              <1> ;;	attribute. If swap disk or file reading fails there is nothing
  1758                              <1> ;;	to do, except to terminate the process which is the owner of
  1759                              <1> ;;	the swapped page.
  1760                              <1> ;;
  1761                              <1> ;;	'swap_in' procedure sets the relevant/respective bit value
  1762                              <1> ;;	in the Swap Allocation Table (as free block). 'swap_in' also
  1763                              <1> ;;	updates [swpd_first] pointer if it is required.
  1764                              <1> ;;
  1765                              <1> ;;	..............................................................	 
  1766                              <1> ;;
  1767                              <1> ;;	Note: If [swap_enabled] value is ZERO, that means there is not
  1768                              <1> ;;	a swap disk or swap file in use... 'swap_in' and 'swap_out'
  1769                              <1> ;;	procedures ans 'swap page que' procedures will not be active...
  1770                              <1> ;;	'Insufficient memory' error will be returned by 'swap_out'
  1771                              <1> ;;	and 'general protection fault' will be returned by 'swap_in'
  1772                              <1> ;;	procedure, if it is called mistakenly (a wrong value in a PTE).		
  1773                              <1> ;;
  1774                              <1> 
  1775                              <1> ; 17/04/2021
  1776                              <1> ; ('swap_in' procedure call is disabled as temporary)
  1777                              <1> 
  1778                              <1> swap_in:
  1779                              <1> 	; 31/08/2015
  1780                              <1> 	; 20/07/2015
  1781                              <1> 	; 28/04/2015
  1782                              <1> 	; 18/04/2015
  1783                              <1> 	; 24/10/2014 (Retro UNIX 386 v1 - beginning)
  1784                              <1> 	;
  1785                              <1> 	; INPUT -> 
  1786                              <1> 	;	EBX = PHYSICAL (real/flat) ADDRESS OF THE MEMORY PAGE
  1787                              <1> 	;	EBP = VIRTUAL (LINEAR) ADDRESS (page fault address)
  1788                              <1> 	;	EAX = Offset Address for the swapped page on the
  1789                              <1> 	;	      swap disk or in the swap file.
  1790                              <1> 	;
  1791                              <1> 	; OUTPUT ->
  1792                              <1> 	;	EAX = 0 if loading at memory has been successful
  1793                              <1> 	;
  1794                              <1> 	;	CF = 1 -> swap disk reading error (disk/file not present
  1795                              <1> 	;		  or sector not present or drive not ready
  1796                              <1> 	;	     EAX = Error code
  1797                              <1> 	;	     [u.error] = EAX 
  1798                              <1> 	;		       = The last error code for the process
  1799                              <1> 	;		         (will be reset after returning to user)	  
  1800                              <1> 	;
  1801                              <1> 	; Modified Registers -> EAX
  1802                              <1> 	;
  1803                              <1> 
  1804                              <1> ;       cmp     dword [swp_drv], 0
  1805                              <1> ;	jna	short swpin_dnp_err
  1806                              <1> ;
  1807                              <1> ;	cmp	eax, [swpd_size]
  1808                              <1> ;	jnb	short swpin_snp_err
  1809                              <1> ;
  1810                              <1> ;	push	esi
  1811                              <1> ;	push	ebx
  1812                              <1> ;	push	ecx
  1813                              <1> ;	mov	esi, [swp_drv]	
  1814                              <1> ;	mov	ecx, PAGE_SIZE / LOGIC_SECT_SIZE  ; 8 !
  1815                              <1> ;		; Note: Even if corresponding physical disk's sector 
  1816                              <1> ;		; size different than 512 bytes, logical disk sector
  1817                              <1> ;		; size is 512 bytes and disk reading procedure
  1818                              <1> ;		; will be performed for reading 4096 bytes
  1819                              <1> ;		; (2*2048, 8*512). 
  1820                              <1> ;	; ESI = Logical disk description table address
  1821                              <1> ;	; EBX = Memory page (buffer) address (physical!)
  1822                              <1> ;	; EAX = Sector adress (offset address, logical sector number)
  1823                              <1> ;	; ECX = Sector count ; 8 sectors
  1824                              <1> ;	push	eax
  1825                              <1> ;	call	logical_disk_read
  1826                              <1> ;	pop	eax
  1827                              <1> ;	jnc	short swpin_read_ok
  1828                              <1> ;	;
  1829                              <1> ;	mov	eax, SWP_DISK_READ_ERR ; drive not ready or read error
  1830                              <1> ;	mov	[u.error], eax
  1831                              <1> ;	jmp	short swpin_retn
  1832                              <1> ;	;
  1833                              <1> ;swpin_read_ok:
  1834                              <1> ;	; EAX = Offset address (logical sector number)
  1835                              <1> ;	call	unlink_swap_block  ; Deallocate swap block	
  1836                              <1> ;	;
  1837                              <1> ;	; EBX = Memory page (buffer) address (physical!)
  1838                              <1> ;	; 20/07/2015
  1839                              <1> ;	mov	ebx, ebp ; virtual address (page fault address)
  1840                              <1> ;       and     bx, ~PAGE_OFF ; ~0FFFh ; reset bits, 0 to 11
  1841                              <1> ;	mov	bl, [u.uno] ; current process number
  1842                              <1> ;	; EBX = Virtual (Linear) address & process number combination
  1843                              <1> ;	call	swap_queue_shift
  1844                              <1> ;	; eax = 0 ; 10/06/2016 (if ebx input > 0, eax output = 0)
  1845                              <1> ;	;sub	eax, eax  ; 0 ; Error Code = 0  (no error)
  1846                              <1> ;	; zf = 1
  1847                              <1> ;swpin_retn:
  1848                              <1> ;	pop	ecx
  1849                              <1> ;	pop	ebx
  1850                              <1> ;	pop	esi
  1851                              <1> ;	retn
  1852                              <1> ;
  1853                              <1> ;swpin_dnp_err:
  1854                              <1> ;	mov	eax, SWP_DISK_NOT_PRESENT_ERR
  1855                              <1> ;swpin_err_retn:
  1856                              <1> ;	mov	[u.error], eax
  1857                              <1> ;	stc
  1858                              <1> ;	retn
  1859                              <1> ;
  1860                              <1> ;swpin_snp_err:
  1861                              <1> ;	mov	eax, SWP_SECTOR_NOT_PRESENT_ERR
  1862                              <1> ;	jmp	short swpin_err_retn
  1863                              <1> 
  1864                              <1> ; 17/04/2021
  1865                              <1> ; ('swap_out' procedure call is disabled as temporary)
  1866                              <1> 
  1867                              <1> swap_out:
  1868                              <1> 	; 10/06/2016
  1869                              <1> 	; 07/06/2016
  1870                              <1>         ; 23/05/2016
  1871                              <1> 	; 19/05/2016 - TRDOS 386 (TRDOS v2.0)
  1872                              <1> 	; 24/10/2014 - 31/08/2015 (Retro UNIX 386 v1)
  1873                              <1> 	;
  1874                              <1> 	; INPUT -> 
  1875                              <1> 	;	none
  1876                              <1> 	;
  1877                              <1> 	; OUTPUT ->
  1878                              <1> 	;	EAX = Physical page address (which is swapped out
  1879                              <1> 	;	      for allocating a new page)
  1880                              <1> 	;	CF = 1 -> swap disk writing error (disk/file not present
  1881                              <1> 	;		  or sector not present or drive not ready
  1882                              <1> 	;	     EAX = Error code
  1883                              <1> 	;	     [u.error] = EAX 
  1884                              <1> 	;		       = The last error code for the process
  1885                              <1> 	;		         (will be reset after returning to user)	  
  1886                              <1> 	;
  1887                              <1> 	; Modified Registers -> none (except EAX)
  1888                              <1> 	;
  1889                              <1> 
  1890                              <1> ;	cmp 	word [swpq_count], 1
  1891                              <1> ;       jc      swpout_im_err ; 'insufficient memory'
  1892                              <1> ;
  1893                              <1> ;       ;cmp    dword [swp_drv], 1
  1894                              <1> ;	;jc	short swpout_dnp_err ; 'swap disk/file not present'
  1895                              <1> ;
  1896                              <1> ;       cmp     dword [swpd_free], 1
  1897                              <1> ;       jc      swpout_nfspc_err ; 'no free space on swap disk'
  1898                              <1> ;
  1899                              <1> ;	push	ebx ; *
  1900                              <1> ;swpout_1:
  1901                              <1> ;	; 10/06/2016
  1902                              <1> ;	xor	ebx, ebx ; shift the queue and return a PTE value
  1903                              <1> ;	call	swap_queue_shift
  1904                              <1> ;	and	eax, eax	; 0 = empty queue (improper entries)
  1905                              <1> ;       jz      swpout_npts_err        ; There is not any proper PTE
  1906                              <1> ;				       ; pointer in the swap queue
  1907                              <1> ;	; EAX = PTE value of the page
  1908                              <1> ;	; EBX = PTE address of the page
  1909                              <1> ;	and	ax, PTE_A_CLEAR ; 0F000h ; clear attribute bits
  1910                              <1> ;	;
  1911                              <1> ;	; 07/06/2016
  1912                              <1> ;	; 19/05/2016
  1913                              <1> ;	; check this page is in timer events or not
  1914                              <1> ;	
  1915                              <1> ;swpout_timer_page_0:
  1916                              <1> ;	push	edx ; **
  1917                              <1> ;
  1918                              <1> ;	; 07/06/2016
  1919                              <1> ;	cmp	byte [timer_events], 0 
  1920                              <1> ;	jna	short swpout_2
  1921                              <1> ;	;
  1922                              <1> ;	mov	dl, [timer_events]
  1923                              <1> ;
  1924                              <1> ;	push	ecx ; ***
  1925                              <1> ;	push	ebx ; ****
  1926                              <1> ;	mov	ebx, timer_set ; beginning address of timer event
  1927                              <1> ;			       ; structures 
  1928                              <1> ;swpout_timer_page_1:
  1929                              <1> ;	mov	cl, [ebx]
  1930                              <1> ;	or	cl, cl ; 0 = free, >0 = process number
  1931                              <1> ;	jz	short swpout_timer_page_3
  1932                              <1> ;	mov	ecx, [ebx+12] ; response (signal return) address
  1933                              <1> ;	and	cx, PTE_A_CLEAR ; clear offset part (right 12 bits)
  1934                              <1> ;				; of the response byte address, to
  1935                              <1> ;				; get beginning of the page address)
  1936                              <1> ;	cmp	eax, ecx
  1937                              <1> ;	jne	short swpout_timer_page_2 ; not same page
  1938                              <1> ;	
  1939                              <1> ;	; !same page!
  1940                              <1> ;	;
  1941                              <1> ;	; NOTE: // 19/05/2016 // - TRDOS 386 feature only ! -
  1942                              <1> ;	; This page will be used by the kernel to put timer event
  1943                              <1> ;	; response (signal return) byte at the requested address;
  1944                              <1> ;	; in order to prevent a possible wrong write (while
  1945                              <1> ;	; this page is swapped out) on physical memory,
  1946                              <1> ;	; we must protect this page against to be swapped out!
  1947                              <1> ;	;
  1948                              <1> ;	pop	ebx ; ****
  1949                              <1> ;	pop	ecx ; ***
  1950                              <1> ;	pop	edx ; **
  1951                              <1> ;	jmp	short swpout_1	; do not swap out this page !
  1952                              <1> ; 
  1953                              <1> ;swpout_timer_page_2:
  1954                              <1> ;	; 07/06/2016
  1955                              <1> ;	dec	dl
  1956                              <1> ;	jz	short swpout_timer_page_4
  1957                              <1> ;swpout_timer_page_3:
  1958                              <1> ;	;cmp	ebx, timer_set + 240 ; last timer event (15*16) 
  1959                              <1> ;	;jnb	short swpout_timer_page_4
  1960                              <1> ;	add	ebx, 16
  1961                              <1> ;	jmp	short swpout_timer_page_1	
  1962                              <1> ;
  1963                              <1> ;swpout_timer_page_4:
  1964                              <1> ;	pop	ebx ; ****
  1965                              <1> ;	pop	ecx ; ***
  1966                              <1> ;swpout_2:
  1967                              <1> ;	mov	edx, ebx	       ; Page table entry address	
  1968                              <1> ;	mov	ebx, eax	       ; Buffer (Page) Address				
  1969                              <1> ;	;
  1970                              <1> ;	call	link_swap_block
  1971                              <1> ;	jnc	short swpout_3	       ; It may not be needed here	
  1972                              <1> ;				       ; because [swpd_free] value
  1973                              <1> ;				       ; was checked at the beginging. 	
  1974                              <1> ;	pop	edx ; **
  1975                              <1> ;	pop	ebx ; *
  1976                              <1> ;	jmp	short swpout_nfspc_err 
  1977                              <1> ;swpout_3:
  1978                              <1> ;	test	eax, 80000000h ; test bit 31 (this may not be needed!)
  1979                              <1> ;	jnz	short swpout_nfspc_err  ; 10/06/2016 (bit 31 = 1 !)
  1980                              <1> ;	;	
  1981                              <1> ;	push	esi ; **
  1982                              <1> ;	push	ecx ; ***
  1983                              <1> ;	push	eax ; sector address ; (31 bit !, bit 31 = 0)
  1984                              <1> ;	mov	esi, [swp_drv]	
  1985                              <1> ;	mov	ecx, PAGE_SIZE / LOGIC_SECT_SIZE  ; 8 !
  1986                              <1> ;		; Note: Even if corresponding physical disk's sector 
  1987                              <1> ;		; size different than 512 bytes, logical disk sector
  1988                              <1> ;		; size is 512 bytes and disk writing procedure
  1989                              <1> ;		; will be performed for writing 4096 bytes
  1990                              <1> ;		; (2*2048, 8*512). 
  1991                              <1> ;	; ESI = Logical disk description table address
  1992                              <1> ;	; EBX = Buffer (Page) address
  1993                              <1> ;	; EAX = Sector adress (offset address, logical sector number)
  1994                              <1> ;	; ECX = Sector count ; 8 sectors
  1995                              <1> ;	; edx = PTE address
  1996                              <1> ;	call	logical_disk_write
  1997                              <1> ;	; edx = PTE address
  1998                              <1> ;	pop	ecx ; sector address	
  1999                              <1> ;	jnc	short swpout_write_ok
  2000                              <1> ;	;
  2001                              <1> ;	;; call	unlink_swap_block ; this block must be left as 'in use'
  2002                              <1> ;swpout_dw_err:
  2003                              <1> ;	mov	eax, SWP_DISK_WRITE_ERR ; drive not ready or write error
  2004                              <1> ;	mov	[u.error], eax
  2005                              <1> ;	jmp	short swpout_retn
  2006                              <1> ;	;
  2007                              <1> ;swpout_write_ok:
  2008                              <1> ;	; EBX = Buffer (page) address
  2009                              <1> ;	; EDX = Page Table Entry address
  2010                              <1> ;	; ECX = Swap disk sector (file block) address (31 bit)
  2011                              <1> ;	shl 	ecx, 1  ; 31 bit sector address from bit 1 to bit 31 
  2012                              <1> ;	mov 	[edx], ecx 
  2013                              <1> ;		; bit 0 = 0 (swapped page)
  2014                              <1> ;	mov	eax, ebx
  2015                              <1> ;swpout_retn:
  2016                              <1> ;	pop	ecx ; ***
  2017                              <1> ;	pop	esi ; **
  2018                              <1> ;	pop	ebx ; *
  2019                              <1> ;	retn
  2020                              <1> ;
  2021                              <1> ;;swpout_dnp_err:
  2022                              <1> ;;	mov	eax, SWP_DISK_NOT_PRESENT_ERR ; disk not present
  2023                              <1> ;;	jmp	short swpout_err_retn
  2024                              <1> ;swpout_nfspc_err:
  2025                              <1> ;	mov	eax, SWP_NO_FREE_SPACE_ERR ; no free space
  2026                              <1> ;swpout_err_retn:
  2027                              <1> ;	mov	[u.error], eax
  2028                              <1> ;	;stc
  2029                              <1> ;	retn
  2030                              <1> ;swpout_npts_err:
  2031                              <1> ;	mov	eax, SWP_NO_PAGE_TO_SWAP_ERR
  2032                              <1> ;	pop	ebx
  2033                              <1> ;	jmp	short swpout_err_retn
  2034                              <1> ;swpout_im_err:
  2035                              <1> ;	mov	eax, ERR_MINOR_IM ; insufficient (out of) memory
  2036                              <1> ;	jmp	short swpout_err_retn
  2037                              <1> 
  2038                              <1> ; 17/04/2021
  2039                              <1> ; ('swap_queue_shift' procedure call is disabled as temporary)
  2040                              <1> 
  2041                              <1> swap_queue_shift:
  2042                              <1> 	; 26/03/2017
  2043                              <1> 	; 10/06/2016
  2044                              <1> 	; 09/06/2016 - TRDOS 386 (TRDOS v2.0)
  2045                              <1> 	; 23/10/2014 - 20/07/2015 (Retro UNIX 386 v1)
  2046                              <1> 	;
  2047                              <1> 	; INPUT ->
  2048                              <1> 	;	EBX = Virtual (linear) address (bit 12 to 31) 
  2049                              <1> 	;	      and process number combination (bit 0 to 11)
  2050                              <1> 	;	EBX = 0 -> shift/drop from the head (offset 0)
  2051                              <1> 	;	
  2052                              <1> 	; OUTPUT ->
  2053                              <1> 	;	If EBX input > 0 
  2054                              <1> 	;	   the queue will be shifted 4 bytes (dword),
  2055                              <1> 	; 	   from the tail to the head, up to entry offset
  2056                              <1> 	; 	   which points to EBX input value or nothing
  2057                              <1> 	;	   to do if EBX value is not found on the queue.
  2058                              <1> 	;	   (The entry -with EBX value- will be removed
  2059                              <1> 	;	   from the queue if it is found.)
  2060                              <1> 	;
  2061                              <1> 	;	   EAX = 0		
  2062                              <1> 	;
  2063                              <1> 	;	If EBX input = 0
  2064                              <1> 	;	   the queue will be shifted 4 bytes (dword),
  2065                              <1> 	; 	   from the tail to the head, if the PTE address
  2066                              <1> 	;	   which is pointed in head of the queue is marked
  2067                              <1> 	;	   as "accessed" or it is marked as "non present".
  2068                              <1> 	;	   (If "accessed" flag of the PTE -which is pointed
  2069                              <1> 	;	   in the head- is set -to 1-, it will be reset
  2070                              <1> 	;	   -to 0- and then, the queue will be rotated 
  2071                              <1> 	;	   -without dropping pointer of the PTE from 
  2072                              <1> 	;	   the queue- for 4 bytes on head to tail direction.
  2073                              <1> 	;	   Pointer in the head will be moved into the tail,
  2074                              <1> 	;	   other PTEs will be shifted on head direction.)
  2075                              <1> 	;
  2076                              <1> 	;	   Swap queue will be shifted up to the first
  2077                              <1> 	;	   'present' or 'non accessed' page will be found
  2078                              <1> 	;	   (as pointed) on the queue head (then it will be
  2079                              <1>         ;          removed/dropped from the queue).
  2080                              <1> 	;
  2081                              <1> 	;	   EAX (> 0) = PTE value of the page which is
  2082                              <1> 	;		 (it's pointer -virtual address-) dropped
  2083                              <1> 	;		 (removed) from swap queue.
  2084                              <1> 	;	   EBX = PTE address of the page (if EAX > 0)
  2085                              <1> 	;	         which is (it's pointer -virtual address-)
  2086                              <1> 	;		 dropped (removed) from swap queue.
  2087                              <1> 	;
  2088                              <1> 	;	   EAX = 0 -> empty swap queue ! 
  2089                              <1> 	;
  2090                              <1> 	; Modified Registers -> EAX, EBX
  2091                              <1> 	;
  2092                              <1> ;	movzx   eax, word [swpq_count]  ; Max. 1024
  2093                              <1> ;	and	ax, ax
  2094                              <1> ;	jz	short swpqs_retn
  2095                              <1> ;	push	edi
  2096                              <1> ;	push	esi
  2097                              <1> ;	push	ecx
  2098                              <1> ;	mov	esi, swap_queue
  2099                              <1> ;	mov	ecx, eax
  2100                              <1> ;	or	ebx, ebx
  2101                              <1> ;	jz	short swpqs_7
  2102                              <1> ;swpqs_1:
  2103                              <1> ;	lodsd
  2104                              <1> ;	cmp	eax, ebx
  2105                              <1> ;	je	short swpqs_2
  2106                              <1> ;	loop	swpqs_1
  2107                              <1> ;	; 10/06/2016
  2108                              <1> ;	sub	eax, eax 
  2109                              <1> ;	jmp	short swpqs_6
  2110                              <1> ;swpqs_2:
  2111                              <1> ;	mov	edi, esi
  2112                              <1> ;	sub 	edi, 4
  2113                              <1> ;swpqs_3:
  2114                              <1> ;	dec	word [swpq_count]
  2115                              <1> ;	jz	short swpqs_5
  2116                              <1> ;swpqs_4:
  2117                              <1> ;	dec 	ecx
  2118                              <1> ;	rep	movsd	; shift up (to the head)
  2119                              <1> ;swpqs_5:
  2120                              <1> ;	xor	eax, eax
  2121                              <1> ;	mov	[edi], eax
  2122                              <1> ;swpqs_6:
  2123                              <1> ;	pop	ecx
  2124                              <1> ;	pop	esi
  2125                              <1> ;	pop	edi
  2126                              <1> ;swpqs_retn:
  2127                              <1> ;	retn		
  2128                              <1> ;swpqs_7:
  2129                              <1> ;	mov	edi, esi ; head
  2130                              <1> ;	lodsd
  2131                              <1> ;	; 20/07/2015
  2132                              <1> ;	mov	ebx, eax
  2133                              <1> ;	and	ebx, ~PAGE_OFF ; ~0FFFh 
  2134                              <1> ;		      ; ebx = virtual address (at page boundary)	
  2135                              <1> ;	and	eax, PAGE_OFF ; 0FFFh
  2136                              <1> ;		      ; ax = process number (1 to 4095)
  2137                              <1> ;	cmp	al, [u.uno]
  2138                              <1> ;		; Max. 16 (nproc) processes for Retro UNIX 386 v1
  2139                              <1> ;	jne	short swpqs_8
  2140                              <1> ;	mov	eax, [u.pgdir]
  2141                              <1> ;	jmp	short swpqs_9
  2142                              <1> ;swpqs_8:
  2143                              <1> ;	; 09/06/2016
  2144                              <1> ;	cmp	byte [eax+p.stat-1], 0
  2145                              <1> ;	jna	short swpqs_3     ; free (or terminated) process
  2146                              <1> ;	cmp	byte [eax+p.stat-1], 2 ; waiting
  2147                              <1> ;	ja	short swpqs_3 	  ; zombie (3) or undefined ?	
  2148                              <1> ;
  2149                              <1> ;	;shl	ax, 2
  2150                              <1> ;	shl	al, 2
  2151                              <1> ;	mov 	eax, [eax+p.upage-4]
  2152                              <1> ;	or	eax, eax
  2153                              <1> ;	jz	short swpqs_3 ; invalid upage
  2154                              <1> ;	add	eax, u.pgdir - user
  2155                              <1> ;			 ; u.pgdir value for the process
  2156                              <1> ;			 ; is in [eax]
  2157                              <1> ;	mov	eax, [eax]
  2158                              <1> ;	and	eax, eax
  2159                              <1> ;	jz	short swpqs_3 ; invalid page directory
  2160                              <1> ;swpqs_9:
  2161                              <1> ;	push	edx
  2162                              <1> ;	; eax = page directory
  2163                              <1> ;	; ebx = virtual address
  2164                              <1> ;	call	get_pte
  2165                              <1> ;	mov	ebx, edx	; PTE address
  2166                              <1> ;	pop	edx
  2167                              <1> ;	; 10/06/2016
  2168                              <1> ;	jc	short swpqs_13 ; empty PDE
  2169                              <1> ;	; EAX = PTE value
  2170                              <1> ;	test	al, PTE_A_PRESENT ; bit 0 = 1
  2171                              <1> ;	jz	short swpqs_13  ; Drop non-present page
  2172                              <1> ;			        ; from the queue (head)
  2173                              <1> ;	test	al, PTE_A_WRITE	; bit 1 = 0 (read only)
  2174                              <1> ;	jz	short swpqs_13  ; Drop read only page
  2175                              <1> ;			        ; from the queue (head) 	
  2176                              <1> ;	;test	al, PTE_A_ACCESS ; bit 5 = 1 (Accessed)
  2177                              <1> ;	;jnz	short swpqs_11  ; present
  2178                              <1> ;			        ; accessed page
  2179                              <1> ;       btr     eax, PTE_A_ACCESS_BIT ; reset 'accessed' bit
  2180                              <1> ;	jc	short swpqs_11  ; accessed page
  2181                              <1> ;
  2182                              <1> ;	dec	ecx
  2183                              <1> ;	mov	[swpq_count], cx
  2184                              <1> ;       jz      short swpqs_10
  2185                              <1> ;		; esi = head + 4
  2186                              <1> ;		; edi = head
  2187                              <1> ;	rep	movsd	 ; n = 1 to k-1, [n - 1] = [n]
  2188                              <1> ;swpqs_10:
  2189                              <1> ;	mov	[edi], ecx ; 0
  2190                              <1> ;	jmp	short swpqs_6 ; 26/03/2017
  2191                              <1> ;
  2192                              <1> ;swpqs_11:
  2193                              <1> ;	mov	[ebx], eax     ; save changed attribute
  2194                              <1> ;	; Rotation (head -> tail)
  2195                              <1> ;	dec	ecx     ; entry count -> last entry number		
  2196                              <1> ;	jz	short swpqs_10
  2197                              <1> ;		; esi = head + 4
  2198                              <1> ;		; edi = head
  2199                              <1> ;	mov	eax, [edi] ; 20/07/2015
  2200                              <1> ;	rep	movsd	 ; n = 1 to k-1, [n - 1] = [n]
  2201                              <1> ;	mov	[edi], eax ; head -> tail ; [k] = [1]
  2202                              <1> ;
  2203                              <1> ;	mov	cx, [swpq_count]
  2204                              <1> ;
  2205                              <1> ;swpqs_12:
  2206                              <1> ;	mov	esi, swap_queue ; head
  2207                              <1> ;       jmp     swpqs_7
  2208                              <1> ;
  2209                              <1> ;swpqs_13:
  2210                              <1> ;	dec	ecx
  2211                              <1> ;	mov	[swpq_count], cx
  2212                              <1> ;       jz      swpqs_5
  2213                              <1> ;	jmp	short swpqs_12
  2214                              <1> 
  2215                              <1> ; 17/04/2021
  2216                              <1> ; ('add_to_swp_queue' procedure call is disabled as temporary)
  2217                              <1> 
  2218                              <1> add_to_swap_queue:
  2219                              <1> 	; 20/02/2017
  2220                              <1> 	; 20/07/2015
  2221                              <1> 	; 24/10/2014 (Retro UNIX 386 v1 - beginning)
  2222                              <1> 	;
  2223                              <1> 	; Adds new page to swap queue
  2224                              <1> 	; (page directories and page tables must not be added
  2225                              <1> 	; to swap queue)	
  2226                              <1> 	;
  2227                              <1> 	; INPUT ->
  2228                              <1> 	;	EBX = Linear (Virtual) addr for current process
  2229                              <1> 	;	[u.uno]
  2230                              <1> 	;	20/02/2017
  2231                              <1> 	;	(Linear address = CORE + user's virtual address)
  2232                              <1> 	;
  2233                              <1> 	; OUTPUT ->
  2234                              <1> 	;	EAX = [swpq_count]
  2235                              <1> 	;	      (after the PTE has been added)
  2236                              <1> 	;	EAX = 0 -> Swap queue is full, (1024 entries)
  2237                              <1> 	;	      the PTE could not be added.
  2238                              <1> 	;
  2239                              <1> 	; Modified Registers -> EAX
  2240                              <1> 	;
  2241                              <1> ;	push	ebx
  2242                              <1> ;       and     bx, ~PAGE_OFF ; ~0FFFh ; reset bits, 0 to 11
  2243                              <1> ;	mov	bl, [u.uno] ; current process number
  2244                              <1> ;	call	swap_queue_shift ; drop from the queue if
  2245                              <1> ;				 ; it is already on the queue
  2246                              <1> ;		; then add it to the tail of the queue
  2247                              <1> ;	movzx	eax, word [swpq_count]
  2248                              <1> ;	cmp	ax, 1024
  2249                              <1> ;	jb	short atsq_1
  2250                              <1> ;	sub	ax, ax
  2251                              <1> ;	pop	ebx
  2252                              <1> ;	retn
  2253                              <1> ;atsq_1:
  2254                              <1> ;	push	esi
  2255                              <1> ;	mov	esi, swap_queue
  2256                              <1> ;	and	ax, ax
  2257                              <1> ;	jz	short atsq_2
  2258                              <1> ;	shl	ax, 2	; convert to offset
  2259                              <1> ;	add	esi, eax
  2260                              <1> ;	shr	ax, 2
  2261                              <1> ;atsq_2:
  2262                              <1> ;	inc	ax
  2263                              <1> ;	mov	[esi], ebx ; Virtual address + [u.uno] combination
  2264                              <1> ;	mov	[swpq_count], ax
  2265                              <1> ;	pop	esi
  2266                              <1> ;	pop	ebx
  2267                              <1> ;	retn
  2268                              <1> 
  2269                              <1> ; 17/04/2021
  2270                              <1> ; ('unlink_swap_block' procedure call is disabled as temporary)
  2271                              <1> 
  2272                              <1> unlink_swap_block:
  2273                              <1> 	; 15/09/2015
  2274                              <1> 	; 30/04/2015
  2275                              <1> 	; 18/04/2015
  2276                              <1> 	; 24/10/2014 (Retro UNIX 386 v1 - beginning)
  2277                              <1> 	;
  2278                              <1> 	; INPUT -> 
  2279                              <1> 	;	EAX = swap disk/file offset address
  2280                              <1> 	;	      (bit 1 to bit 31)
  2281                              <1> 	; OUTPUT ->
  2282                              <1> 	;	[swpd_free] is increased
  2283                              <1> 	;	(corresponding SWAP DISK ALLOC. TABLE bit is SET)
  2284                              <1> 	;
  2285                              <1> 	; Modified Registers -> EAX
  2286                              <1> 	;
  2287                              <1> ;	push	ebx
  2288                              <1> ;	push	edx
  2289                              <1> ;	;
  2290                              <1> ;	shr	eax, SECTOR_SHIFT+1  ;3+1 ; shift sector address to 
  2291                              <1> ;				     ; 3 bits right
  2292                              <1> ;				     ; to get swap block/page number
  2293                              <1> ;	mov	edx, eax
  2294                              <1> ;	; 15/09/2015
  2295                              <1> ;	shr	edx, 3		     ; to get offset to S.A.T.
  2296                              <1> ;				     ; (1 allocation bit = 1 page)
  2297                              <1> ;				     ; (1 allocation bytes = 8 pages)
  2298                              <1> ;	and	dl, 0FCh 	     ; clear lower 2 bits
  2299                              <1> ;				     ; (to get 32 bit position)			
  2300                              <1> ;	;
  2301                              <1> ;	mov	ebx, swap_alloc_table ; Swap Allocation Table address
  2302                              <1> ;	add	ebx, edx
  2303                              <1> ;	and	eax, 1Fh	     ; lower 5 bits only
  2304                              <1> ;				     ; (allocation bit position)	 
  2305                              <1> ;	cmp 	eax, [swpd_next]     ; is the new free block addr. lower
  2306                              <1> ;				     ; than the address in 'swpd_next' ?
  2307                              <1> ;				     ; (next/first free block value)		
  2308                              <1> ;	jnb	short uswpbl_1	     ; no	
  2309                              <1> ;	mov	[swpd_next], eax     ; yes	
  2310                              <1> ;uswpbl_1:
  2311                              <1> ;	bts	[ebx], eax	     ; unlink/release/deallocate block
  2312                              <1> ;				     ; set relevant bit to 1.
  2313                              <1> ;				     ; set CF to the previous bit value	
  2314                              <1> ;	cmc			     ; complement carry flag	
  2315                              <1> ;	jc	short uswpbl_2	     ; do not increase swfd_free count
  2316                              <1> ;				     ; if the block is already deallocated
  2317                              <1> ;				     ; before.	
  2318                              <1> ;       inc     dword [swpd_free]
  2319                              <1> ;uswpbl_2:
  2320                              <1> ;	pop	edx
  2321                              <1> ;	pop	ebx
  2322                              <1> ;	retn
  2323                              <1> 
  2324                              <1> ; 17/04/2021
  2325                              <1> ; ('ink_swap_block' procedure call is disabled as temporary)
  2326                              <1> 
  2327                              <1> link_swap_block:
  2328                              <1> 	; 01/07/2015
  2329                              <1> 	; 18/04/2015
  2330                              <1> 	; 24/10/2014 (Retro UNIX 386 v1 - beginning)
  2331                              <1> 	;
  2332                              <1> 	; INPUT -> none
  2333                              <1> 	;
  2334                              <1> 	; OUTPUT ->
  2335                              <1> 	;	EAX = OFFSET ADDRESS OF THE ALLOCATED BLOCK (4096 bytes)
  2336                              <1> 	;	      in sectors (corresponding 
  2337                              <1> 	;	      SWAP DISK ALLOCATION TABLE bit is RESET)
  2338                              <1> 	;
  2339                              <1> 	;	CF = 1 and EAX = 0 
  2340                              <1> 	; 		   if there is not a free block to be allocated	
  2341                              <1> 	;
  2342                              <1> 	; Modified Registers -> none (except EAX)
  2343                              <1> 	;
  2344                              <1> 
  2345                              <1> ;	;mov	eax, [swpd_free]
  2346                              <1> ;	;and	eax, eax
  2347                              <1> ;	;jz	short out_of_swpspc
  2348                              <1> ;	;
  2349                              <1> ;	push	ebx
  2350                              <1> ;	push	ecx
  2351                              <1> ;	;
  2352                              <1> ;	mov	ebx, swap_alloc_table ; Swap Allocation Table offset
  2353                              <1> ;	mov	ecx, ebx
  2354                              <1> ;	add	ebx, [swpd_next] ; Free block searching starts from here
  2355                              <1> ;				 ; next_free_swap_block >> 5
  2356                              <1> ;	add	ecx, [swpd_last] ; Free block searching ends here
  2357                              <1> ;				 ; (total_swap_blocks - 1) >> 5
  2358                              <1> ;lswbl_scan:
  2359                              <1> ;	cmp	ebx, ecx
  2360                              <1> ;	ja	short lswbl_notfound
  2361                              <1> ;	;
  2362                              <1> ;	bsf	eax, [ebx] ; Scans source operand for first bit set (1).
  2363                              <1> ;			   ; Clears ZF if a bit is found set (1) and 
  2364                              <1> ;			   ; loads the destination with an index to
  2365                              <1> ;			   ; first set bit. (0 -> 31) 
  2366                              <1> ;			   ; Sets ZF to 1 if no bits are found set.
  2367                              <1> ;	; 01/07/2015
  2368                              <1> ;	jnz	short lswbl_found ; ZF = 0 -> a free block has been found
  2369                              <1> ;			 ;
  2370                              <1> ;			 ; NOTE:  a Swap Disk Allocation Table bit 
  2371                              <1> ;			 ;	  with value of 1 means 
  2372                              <1> ;			 ;	  the corresponding page is free 
  2373                              <1> ;			 ;	  (Retro UNIX 386 v1 feaure only!)
  2374                              <1> ;	add	ebx, 4
  2375                              <1> ;			 ; We return back for searching next page block
  2376                              <1> ;			 ; NOTE: [swpd_free] is not ZERO; so, 
  2377                              <1> ;			 ;	 we always will find at least 1 free block here.
  2378                              <1> ;	jmp    	short lswbl_scan
  2379                              <1> ;	;
  2380                              <1> ;lswbl_notfound:	
  2381                              <1> ;	sub	ecx, swap_alloc_table
  2382                              <1> ;	mov	[swpd_next], ecx ; next/first free page = last page 
  2383                              <1> ;				 ; (unlink_swap_block procedure will change it)
  2384                              <1> ;	xor	eax, eax
  2385                              <1> ;	mov	[swpd_free], eax
  2386                              <1> ;	stc
  2387                              <1> ;lswbl_ok:
  2388                              <1> ;	pop	ecx
  2389                              <1> ;	pop	ebx
  2390                              <1> ;	retn
  2391                              <1> ;	;
  2392                              <1> ;;out_of_swpspc:
  2393                              <1> ;;	stc
  2394                              <1> ;;	retn
  2395                              <1> ;
  2396                              <1> ;lswbl_found:
  2397                              <1> ;	mov	ecx, ebx
  2398                              <1> ;	sub	ecx, swap_alloc_table
  2399                              <1> ;	mov	[swpd_next], ecx ; Set first free block searching start
  2400                              <1> ;				 ; address/offset (to the next)
  2401                              <1> ;       dec     dword [swpd_free] ; 1 block has been allocated (X = X-1) 
  2402                              <1> ;	;
  2403                              <1> ;	btr	[ebx], eax	 ; The destination bit indexed by the source value
  2404                              <1> ;				 ; is copied into the Carry Flag and then cleared
  2405                              <1> ;				 ; in the destination.
  2406                              <1> ;				 ;
  2407                              <1> ;				 ; Reset the bit which is corresponding to the 
  2408                              <1> ;				 ; (just) allocated block.
  2409                              <1> ;	shl	ecx, 5		 ; (block offset * 32) + block index
  2410                              <1> ;	add	eax, ecx	 ; = block number
  2411                              <1> ;	shl	eax, SECTOR_SHIFT ; 3, sector (offset) address of the block
  2412                              <1> ;				 ; 1 block =  8 sectors
  2413                              <1> ;	;
  2414                              <1> ;	; EAX = offset address of swap disk/file sector (beginning of the block)
  2415                              <1> ;	;
  2416                              <1> ;	; NOTE: The relevant page table entry will be updated
  2417                              <1> ;	;       according to this EAX value...
  2418                              <1> ;	;
  2419                              <1> ;	jmp	short lswbl_ok
  2420                              <1> 
  2421                              <1> ; 17/04/2021
  2422                              <1> ; ('logical_disk_read' procedure call is disabled as temporary)
  2423                              <1> 
  2424                              <1> logical_disk_read:
  2425                              <1> 	; 20/07/2015
  2426                              <1> 	; 09/03/2015 (temporary code here)
  2427                              <1> 	;
  2428                              <1> 	; INPUT ->
  2429                              <1> 	; 	ESI = Logical disk description table address
  2430                              <1> 	; 	EBX = Memory page (buffer) address (physical!)
  2431                              <1> 	; 	EAX = Sector adress (offset address, logical sector number)
  2432                              <1> 	; 	ECX = Sector count
  2433                              <1> 	;
  2434                              <1> 	;
  2435                              <1> ;	retn
  2436                              <1> 
  2437                              <1> ; 17/04/2021
  2438                              <1> ; ('logical_disk_write' procedure call is disabled as temporary)
  2439                              <1> 
  2440                              <1> logical_disk_write:
  2441                              <1> 	; 20/07/2015
  2442                              <1> 	; 09/03/2015 (temporary code here)
  2443                              <1> 	;
  2444                              <1> 	; INPUT ->
  2445                              <1> 	; 	ESI = Logical disk description table address
  2446                              <1> 	; 	EBX = Memory page (buffer) address (physical!)
  2447                              <1> 	; 	EAX = Sector adress (offset address, logical sector number)
  2448                              <1> 	; 	ECX = Sector count
  2449                              <1> 	;
  2450                              <1> ;	retn
  2451                              <1> 
  2452                              <1> get_physical_addr:
  2453                              <1> 	; 17/04/2021 - TRDOS 386 v2.0.4
  2454                              <1> 	;	(temporary modifications)
  2455                              <1> 	;
  2456                              <1> 	; 26/03/2017
  2457                              <1> 	; 20/02/2017
  2458                              <1> 	; 27/05/2016 - TRDOS 386 (TRDOS v2.0)
  2459                              <1> 	; 18/10/2015
  2460                              <1> 	; 29/07/2015
  2461                              <1> 	; 20/07/2015
  2462                              <1> 	; 04/06/2015
  2463                              <1> 	; 20/05/2015
  2464                              <1> 	; 28/04/2015
  2465                              <1> 	; 18/04/2015
  2466                              <1> 	; Get physical address
  2467                              <1> 	;     (allocates a new page for user if it is not present)
  2468                              <1> 	;	
  2469                              <1> 	; (This subroutine is needed for mapping user's virtual 
  2470                              <1> 	; (buffer) address to physical address (of the buffer).)
  2471                              <1> 	; ('sys write', 'sys read' system calls...)
  2472                              <1> 	;
  2473                              <1> 	; INPUT ->
  2474                              <1> 	;	EBX = virtual address
  2475                              <1> 	;	u.pgdir = page directory (physical) address
  2476                              <1> 	;
  2477                              <1> 	; OUTPUT ->
  2478                              <1> 	;	EAX = physical address 
  2479                              <1> 	;	EBX = linear address	
  2480                              <1> 	;	EDX = physical address of the page frame
  2481                              <1> 	;	      (with attribute bits)
  2482                              <1> 	;	ECX = byte count within the page frame
  2483                              <1> 	;
  2484                              <1> 	; Modified Registers -> EAX, EBX, ECX, EDX
  2485                              <1> 	;
  2486 00005AD1 81C300004000        <1> 	add	ebx, CORE ; 18/10/2015
  2487                              <1> get_physical_addr_x: ; 27/05/2016
  2488 00005AD7 A1[74010300]        <1> 	mov	eax, [u.pgdir]
  2489 00005ADC E824FDFFFF          <1> 	call	get_pte
  2490                              <1> 		; EDX = Page table entry address (if CF=0)
  2491                              <1> 	        ;       Page directory entry address (if CF=1)
  2492                              <1> 		;       (Bit 0 value is 0 if PT is not present)
  2493                              <1> 		; EAX = Page table entry value (page address)
  2494                              <1> 		;	CF = 1 -> PDE not present or invalid ? 
  2495 00005AE1 731C                <1> 	jnc	short gpa_1
  2496                              <1> 	;
  2497 00005AE3 E80BFCFFFF          <1> 	call	allocate_page
  2498 00005AE8 723F                <1> 	jc	short gpa_im_err  ; 'insufficient memory' error
  2499                              <1> gpa_0:
  2500 00005AEA E875FCFFFF          <1> 	call 	clear_page
  2501                              <1> 	; EAX = Physical (base) address of the allocated (new) page
  2502 00005AEF 0C07                <1> 	or	al, PDE_A_PRESENT + PDE_A_WRITE + PDE_A_USER ; 4+2+1 = 7
  2503                              <1> 			   ; lower 3 bits are used as U/S, R/W, P flags
  2504                              <1> 			   ; (user, writable, present page)	
  2505 00005AF1 8902                <1> 	mov	[edx], eax ; Let's put the new page directory entry here !
  2506 00005AF3 A1[74010300]        <1> 	mov	eax, [u.pgdir]	
  2507 00005AF8 E808FDFFFF          <1> 	call	get_pte
  2508 00005AFD 722A                <1> 	jc	short gpa_im_err ; 'insufficient memory' error
  2509                              <1> gpa_1:
  2510                              <1> 	; EAX = PTE value, EDX = PTE address
  2511 00005AFF A801                <1> 	test 	al, PTE_A_PRESENT
  2512 00005B01 7516                <1> 	jnz	short gpa_3 ; 26/03/2017
  2513 00005B03 09C0                <1> 	or	eax, eax
  2514 00005B05 7446                <1> 	jz	short gpa_7  ; Allocate a new page
  2515                              <1> 
  2516                              <1> ; 17/04/2021 (TRDOS 386 v2.0.4)
  2517                              <1> ; ('reload_page' procedure call is disabled as temporary)
  2518 00005B07 EB20                <1> 	jmp	short gpa_im_err  ; temporary !
  2519                              <1> 
  2520                              <1> 	; 20/07/2015
  2521                              <1> ;	push	ebp
  2522                              <1> ;	mov	ebp, ebx ; virtual (linear) address
  2523                              <1> ;	; reload swapped page
  2524                              <1> ;	call	reload_page ; 28/04/2015
  2525                              <1> ;	pop	ebp
  2526                              <1> ;	jc	short gpa_retn
  2527                              <1> gpa_2:
  2528                              <1> 	; 26/03/2017
  2529                              <1> 	; 20/02/2017
  2530                              <1> 	; If a page will contain a Signal Response Byte
  2531                              <1> 	; it must not be swapped out, because
  2532                              <1> 	; timer service or irq callback service
  2533                              <1> 	; will write a signal return/response byte 
  2534                              <1> 	; directly by using physical address of Signal
  2535                              <1> 	; Response Byte.(Even if process is not running,
  2536                              <1> 	; or it is running with swapped out pages.)
  2537                              <1> 	;
  2538                              <1> 	; 'no_page_swap' will be set by 'systimer' or
  2539                              <1> 	; 'syscalbac' sistem functions/calls. (*)
  2540                              <1> 	;
  2541 00005B09 803D[DE880100]00    <1> 	cmp	byte [no_page_swap], 0
  2542 00005B10 761D                <1> 	jna	short gpa_4 ; this page can be swapped out
  2543                              <1> 	; this page must not be swapped out
  2544                              <1> 	; but 'no_page_swap' must be reset here
  2545                              <1> 	; immediately for other callers (*)
  2546                              <1> 	; (otherwise, swap queue would not be long enough) 
  2547 00005B12 E844000000          <1> 	call	gpa_8 ; 26/03/2017
  2548 00005B17 EB16                <1> 	jmp	short gpa_5
  2549                              <1> gpa_3: 
  2550                              <1> 	; 26/03/2017
  2551 00005B19 803D[DE880100]00    <1> 	cmp	byte [no_page_swap], 0
  2552 00005B20 7611                <1> 	jna	short gpa_6 ; this page can be swapped out
  2553 00005B22 E834000000          <1> 	call	gpa_8
  2554 00005B27 EB0A                <1> 	jmp	short gpa_6
  2555                              <1> 
  2556                              <1> gpa_im_err:	
  2557 00005B29 B804000000          <1> 	mov	eax, ERR_MINOR_IM ; Insufficient memory (minor) error!
  2558                              <1> 				  ; Major error = 0 (No protection fault)	
  2559 00005B2E C3                  <1> 	retn
  2560                              <1> gpa_4:
  2561                              <1> ; 17/04/2021 (TRDOS 386 v2.0.4)
  2562                              <1> ; ('add_to_swap_queue' procedure call is disabled as temporary)
  2563                              <1> 
  2564                              <1> 	; 20/07/2015
  2565                              <1> 	; 20/05/2015
  2566                              <1> 	; add this page to swap queue
  2567                              <1> ;	push	eax 
  2568                              <1> ;	; EBX = Linear (CORE+virtual) address ; 20/02/2017 
  2569                              <1> ;	call 	add_to_swap_queue
  2570                              <1> ;	pop	eax
  2571                              <1> gpa_5:
  2572                              <1> 		; PTE address in EDX
  2573                              <1> 		; virtual address in EBX
  2574                              <1> 	; EAX = memory page address
  2575 00005B2F 0C07                <1> 	or	al, PTE_A_PRESENT + PTE_A_USER + PTE_A_WRITE
  2576                              <1> 				  ; present flag, bit 0 = 1
  2577                              <1> 				  ; user flag, bit 2 = 1	
  2578                              <1> 				  ; writable flag, bit 1 = 1
  2579 00005B31 8902                <1> 	mov	[edx], eax  ; Update PTE value
  2580                              <1> gpa_6:
  2581                              <1> 	; 18/10/2015
  2582 00005B33 89D9                <1> 	mov	ecx, ebx
  2583 00005B35 81E1FF0F0000        <1> 	and	ecx, PAGE_OFF
  2584 00005B3B 89C2                <1> 	mov 	edx, eax
  2585 00005B3D 662500F0            <1> 	and	ax, PTE_A_CLEAR
  2586 00005B41 01C8                <1> 	add	eax, ecx
  2587 00005B43 F7D9                <1> 	neg	ecx ; 1 -> -1 (0FFFFFFFFh), 4095 (0FFFh) -> -4095
  2588 00005B45 81C100100000        <1> 	add	ecx, PAGE_SIZE
  2589 00005B4B F8                  <1> 	clc
  2590                              <1> gpa_retn:
  2591 00005B4C C3                  <1> 	retn
  2592                              <1> gpa_7:	
  2593 00005B4D E8A1FBFFFF          <1> 	call	allocate_page
  2594 00005B52 72D5                <1> 	jc	short gpa_im_err ; 'insufficient memory' error
  2595 00005B54 E80BFCFFFF          <1> 	call	clear_page
  2596 00005B59 EBAE                <1> 	jmp	short gpa_2
  2597                              <1> 
  2598                              <1> gpa_8: ; 26/03/2017
  2599 00005B5B C605[DE880100]00    <1> 	mov	byte [no_page_swap], 0
  2600                              <1> 
  2601 00005B62 C3                  <1> 	retn	; 17/04/2021 (temporary)
  2602                              <1> 
  2603                              <1> ; 17/04/2021 (TRDOS 386 v2.0.4)
  2604                              <1> ; ('swap_queue_shift' procedure call is disabled as temporary)
  2605                              <1> ;	
  2606                              <1> ;	push	ebx
  2607                              <1> ;	push	eax ; 26/03/2017
  2608                              <1> ;       and     bx, ~PAGE_OFF ; ~0FFFh ; reset bits, 0 to 11
  2609                              <1> ;	mov	bl, [u.uno] ; current process number
  2610                              <1> ;	call	swap_queue_shift ; drop from the queue if
  2611                              <1> ;				 ; it is already on the queue
  2612                              <1> ;	pop	eax ; 26/03/2017
  2613                              <1> ;	pop	ebx
  2614                              <1> ;
  2615                              <1> ;	retn
  2616                              <1> 
  2617                              <1> ; 17/04/2021
  2618                              <1> ; ('reload_page' procedure call is disabled as temporary)
  2619                              <1> 
  2620                              <1> reload_page:
  2621                              <1> 	; 20/07/2015
  2622                              <1> 	; 28/04/2015 (Retro UNIX 386 v1 - beginning)
  2623                              <1> 	;
  2624                              <1> 	; Reload (Restore) swapped page at memory
  2625                              <1> 	;
  2626                              <1> 	; INPUT -> 
  2627                              <1> 	;	EBP = Virtual (linear) memory address
  2628                              <1> 	;	EAX = PTE value (swap disk sector address)
  2629                              <1> 	;	(Swap disk sector address = bit 1 to bit 31 of EAX)	
  2630                              <1> 	; OUTPUT ->
  2631                              <1> 	;	EAX = PHYSICAL (real/flat) ADDRESS OF RELOADED PAGE
  2632                              <1> 	;
  2633                              <1> 	;	CF = 1 and EAX = error code
  2634                              <1> 	;
  2635                              <1> 	; Modified Registers -> none (except EAX)
  2636                              <1> 	;
  2637                              <1> ;	shr	eax, 1   ; Convert PTE value to swap disk address 
  2638                              <1> ;	push	ebx      ;
  2639                              <1> ;	mov	ebx, eax ; Swap disk (offset) address	
  2640                              <1> ;	call	allocate_page
  2641                              <1> ;	jc	short rlp_im_err
  2642                              <1> ;	xchg 	eax, ebx	
  2643                              <1> ;	; EBX = Physical memory (page) address
  2644                              <1> ;	; EAX = Swap disk (offset) address
  2645                              <1> ;	; EBP = Virtual (linear) memory address
  2646                              <1> ;	call	swap_in
  2647                              <1> ;	jc	short rlp_swp_err  ; (swap disk/file read error)
  2648                              <1> ;	mov	eax, ebx	
  2649                              <1> ;rlp_retn:
  2650                              <1> ;	pop	ebx
  2651                              <1> ;	retn
  2652                              <1> ;	
  2653                              <1> ;rlp_im_err:	
  2654                              <1> ;	mov	eax, ERR_MINOR_IM ; Insufficient memory (minor) error!
  2655                              <1> ;				  ; Major error = 0 (No protection fault)	
  2656                              <1> ;	jmp	short rlp_retn
  2657                              <1> ;
  2658                              <1> ;rlp_swp_err:
  2659                              <1> ;	mov 	eax, SWP_DISK_READ_ERR ; Swap disk read error !
  2660                              <1> ;	jmp	short rlp_retn
  2661                              <1> 
  2662                              <1> copy_page_dir:
  2663                              <1> 	; 17/04/2021 (temporary modifications)
  2664                              <1> 	; 19/09/2015
  2665                              <1> 	; temporary - 07/09/2015
  2666                              <1> 	; 07/09/2015 (Retro UNIX 386 v1 - beginning)
  2667                              <1> 	;
  2668                              <1> 	; INPUT -> 
  2669                              <1> 	;	[u.pgdir] = PHYSICAL (real/flat) ADDRESS of the parent's
  2670                              <1> 	;		    page directory.
  2671                              <1> 	; OUTPUT ->
  2672                              <1> 	;	EAX =  PHYSICAL (real/flat) ADDRESS of the child's
  2673                              <1> 	;	       page directory.
  2674                              <1> 	;	(New page directory with new page table entries.)
  2675                              <1> 	;	(New page tables with read only copies of the parent's
  2676                              <1> 	;	pages.)
  2677                              <1> 	;	EAX = 0 -> Error (CF = 1)
  2678                              <1> 	;
  2679                              <1> 	; Modified Registers -> none (except EAX)
  2680                              <1> 	;
  2681 00005B63 E88BFBFFFF          <1> 	call	allocate_page
  2682 00005B68 723E                <1> 	jc	short cpd_err
  2683                              <1> 	;
  2684 00005B6A 55                  <1> 	push	ebp ; 20/07/2015
  2685 00005B6B 56                  <1> 	push	esi
  2686 00005B6C 57                  <1> 	push	edi
  2687 00005B6D 53                  <1> 	push	ebx
  2688 00005B6E 51                  <1> 	push	ecx
  2689 00005B6F 8B35[74010300]      <1> 	mov	esi, [u.pgdir]
  2690 00005B75 89C7                <1> 	mov	edi, eax
  2691 00005B77 50                  <1> 	push	eax ; save child's page directory address
  2692                              <1> 	; copy PDE 0 from the parent's page dir to the child's page dir
  2693                              <1> 	; (use same system space for all user page tables) 
  2694 00005B78 A5                  <1> 	movsd
  2695 00005B79 BD00004000          <1> 	mov	ebp, 1024*4096 ; pass the 1st 4MB (system space)
  2696 00005B7E B9FF030000          <1> 	mov	ecx, (PAGE_SIZE / 4) - 1 ; 1023
  2697                              <1> cpd_0:	
  2698 00005B83 AD                  <1> 	lodsd
  2699                              <1> 	;or	eax, eax
  2700                              <1>         ;jnz     short cpd_1
  2701 00005B84 A801                <1> 	test	al, PDE_A_PRESENT ;  bit 0 =  1
  2702 00005B86 7508                <1> 	jnz	short cpd_1
  2703                              <1>  	; (virtual address at the end of the page table)	
  2704 00005B88 81C500004000        <1> 	add	ebp, 1024*4096 ; page size * PTE count
  2705 00005B8E EB0F                <1> 	jmp	short cpd_2
  2706                              <1> cpd_1:	
  2707 00005B90 662500F0            <1> 	and	ax, PDE_A_CLEAR ; 0F000h ; clear attribute bits
  2708 00005B94 89C3                <1> 	mov	ebx, eax
  2709                              <1> 	; EBX = Parent's page table address
  2710 00005B96 E81F000000          <1> 	call	copy_page_table
  2711 00005B9B 720C                <1> 	jc	short cpd_p_err
  2712                              <1> 	; EAX = Child's page table address
  2713 00005B9D 0C07                <1> 	or	al, PDE_A_PRESENT + PDE_A_WRITE + PDE_A_USER
  2714                              <1> 			 ; set bit 0, bit 1 and bit 2 to 1
  2715                              <1> 			 ; (present, writable, user)
  2716                              <1> cpd_2:
  2717 00005B9F AB                  <1> 	stosd
  2718 00005BA0 E2E1                <1> 	loop	cpd_0
  2719                              <1> 	;
  2720 00005BA2 58                  <1> 	pop	eax  ; restore child's page directory address
  2721                              <1> cpd_3:
  2722 00005BA3 59                  <1> 	pop	ecx
  2723 00005BA4 5B                  <1> 	pop	ebx
  2724 00005BA5 5F                  <1> 	pop	edi
  2725 00005BA6 5E                  <1> 	pop	esi
  2726 00005BA7 5D                  <1> 	pop	ebp
  2727                              <1> cpd_err:
  2728 00005BA8 C3                  <1> 	retn
  2729                              <1> cpd_p_err:
  2730                              <1> 	; release the allocated pages missing (recover free space)
  2731 00005BA9 58                  <1> 	pop	eax  ; the new page directory address (physical)
  2732 00005BAA 8B1D[74010300]      <1> 	mov	ebx, [u.pgdir] ; parent's page directory address 
  2733 00005BB0 E86EFCFFFF          <1> 	call 	deallocate_page_dir
  2734 00005BB5 29C0                <1> 	sub	eax, eax ; 0
  2735 00005BB7 F9                  <1> 	stc
  2736 00005BB8 EBE9                <1> 	jmp	short cpd_3	
  2737                              <1> 
  2738                              <1> copy_page_table:
  2739                              <1> 	; 17/04/2021 (temporary modifications)
  2740                              <1> 	; 19/09/2015
  2741                              <1> 	; temporary - 07/09/2015
  2742                              <1> 	; 07/09/2015 (Retro UNIX 386 v1 - beginning)
  2743                              <1> 	;
  2744                              <1> 	; INPUT -> 
  2745                              <1> 	;	EBX = PHYSICAL (real/flat) ADDRESS of the parent's page table.
  2746                              <1> 	;	EBP = page table entry index (from 'copy_page_dir')
  2747                              <1> 	; OUTPUT ->
  2748                              <1> 	;	EAX = PHYSICAL (real/flat) ADDRESS of the child's page table.
  2749                              <1> 	;	EBP = (recent) page table index (for 'add_to_swap_queue')	
  2750                              <1> 	;	CF = 1 -> error 
  2751                              <1> 	;
  2752                              <1> 	; Modified Registers -> EBP (except EAX)
  2753                              <1> 	;
  2754 00005BBA E834FBFFFF          <1> 	call	allocate_page
  2755 00005BBF 7244                <1> 	jc	short cpt_err
  2756                              <1> 	;
  2757 00005BC1 50                  <1> 	push	eax ; *
  2758                              <1> 	;push 	ebx
  2759 00005BC2 56                  <1> 	push	esi
  2760 00005BC3 57                  <1> 	push	edi
  2761 00005BC4 52                  <1> 	push	edx
  2762 00005BC5 51                  <1> 	push	ecx
  2763                              <1> 	;
  2764 00005BC6 89DE                <1> 	mov	esi, ebx
  2765 00005BC8 89C7                <1> 	mov	edi, eax
  2766 00005BCA 89C2                <1> 	mov	edx, eax
  2767 00005BCC 81C200100000        <1> 	add	edx, PAGE_SIZE 	
  2768                              <1> cpt_0:
  2769 00005BD2 AD                  <1> 	lodsd
  2770 00005BD3 A801                <1> 	test	al, PTE_A_PRESENT ;  bit 0 = 1
  2771                              <1> 	;jnz	short cpt_1 (*)
  2772                              <1> 	; 17/04/2021 (temporary (*)
  2773                              <1> 	;and	eax, eax (*)
  2774 00005BD5 741E                <1> 	jz	short cpt_2  ; 17/04/2021
  2775                              <1> 	
  2776                              <1> ; 17/04/2021
  2777                              <1> ; ('reload_page' procedure call is disabled as temporary)
  2778                              <1> ;
  2779                              <1> ;	; ebp = virtual (linear) address of the memory page
  2780                              <1> ;	call	reload_page ; 28/04/2015
  2781                              <1> ;	jc	short cpt_p_err
  2782                              <1> cpt_1:
  2783 00005BD7 662500F0            <1> 	and	ax, PTE_A_CLEAR ; 0F000h ; clear attribute bits
  2784 00005BDB 89C1                <1> 	mov	ecx, eax
  2785                              <1> 	; Allocate a new page for the child process
  2786 00005BDD E811FBFFFF          <1> 	call	allocate_page
  2787 00005BE2 721C                <1> 	jc	short cpt_p_err
  2788 00005BE4 57                  <1> 	push	edi
  2789 00005BE5 56                  <1> 	push	esi
  2790 00005BE6 89CE                <1> 	mov	esi, ecx
  2791 00005BE8 89C7                <1> 	mov	edi, eax
  2792 00005BEA B900040000          <1> 	mov	ecx, PAGE_SIZE/4
  2793 00005BEF F3A5                <1> 	rep	movsd	; copy page (4096 bytes)
  2794 00005BF1 5E                  <1> 	pop	esi
  2795 00005BF2 5F                  <1> 	pop	edi
  2796                              <1> 	; 
  2797                              <1> 
  2798                              <1> ; 17/04/2021
  2799                              <1> ; ('add_to_swap_queue' procedure call is disabled as temporary)	
  2800                              <1> ;
  2801                              <1> ;	push	ebx
  2802                              <1> ;	push	eax
  2803                              <1> ;	mov	ebx, ebp
  2804                              <1> ;	; ebx = virtual address of the memory page
  2805                              <1> ;	call	add_to_swap_queue
  2806                              <1> ;	pop	eax
  2807                              <1> ;	pop	ebx
  2808                              <1> 	;
  2809                              <1> 	;or	ax, PTE_A_USER+PTE_A_PRESENT 
  2810 00005BF3 0C07                <1> 	or	al, PTE_A_USER+PTE_A_WRITE+PTE_A_PRESENT 
  2811                              <1> cpt_2:
  2812 00005BF5 AB                  <1> 	stosd  ; EDI points to child's PTE  	 
  2813                              <1> 	;
  2814 00005BF6 81C500100000        <1> 	add	ebp, 4096 ; 20/07/2015 (next page)
  2815                              <1> 	;
  2816 00005BFC 39D7                <1> 	cmp	edi, edx
  2817 00005BFE 72D2                <1> 	jb	short cpt_0
  2818                              <1> cpt_p_err:
  2819 00005C00 59                  <1> 	pop	ecx
  2820 00005C01 5A                  <1> 	pop	edx
  2821 00005C02 5F                  <1> 	pop	edi
  2822 00005C03 5E                  <1> 	pop	esi
  2823                              <1> 	;pop	ebx
  2824 00005C04 58                  <1> 	pop	eax ; *
  2825                              <1> cpt_err:
  2826 00005C05 C3                  <1> 	retn
  2827                              <1> 
  2828                              <1> allocate_memory_block:
  2829                              <1> 	; 01/05/2017
  2830                              <1> 	; 28/04/2017
  2831                              <1> 	; 25/04/2017
  2832                              <1> 	; 01/04/2016, 02/04/2016, 03/04/2016
  2833                              <1> 	; 13/03/2016, 14/03/2016
  2834                              <1> 	; 12/03/2016 (TRDOS 386 = TRDOS v2.0)
  2835                              <1> 	; Allocating contiguous memory pages (in the kernel's memory space)
  2836                              <1> 	;
  2837                              <1> 	; INPUT -> 
  2838                              <1> 	;	EAX = Beginning address (physical)
  2839                              <1> 	;	EAX = 0 -> Allocate memory block from the first proper aperture	
  2840                              <1> 	;	ECX = Number of bytes to be allocated
  2841                              <1> 	;
  2842                              <1> 	; OUTPUT ->
  2843                              <1> 	; 	1) cf = 0 -> successful
  2844                              <1> 	;	EAX = Beginning (physical) address of the allocated memory block
  2845                              <1> 	;	ECX = Number of allocated bytes (rounded up to page borders) 
  2846                              <1> 	;	2) cf = 1 -> unsuccessful
  2847                              <1> 	;	 2.1) If EAX > 0 -> 
  2848                              <1> 	;	      (Number of requested pages is more than # of free pages
  2849                              <1> 	;	       but contiguous free pages -the aperture- is not enough!)	   	
  2850                              <1> 	;	      EAX = Beginning address of available aperture
  2851                              <1> 	;		    (one of all aperture with max. aperture size/length)		
  2852                              <1> 	;	      ECX = Size of available aperture (memory block) in bytes
  2853                              <1> 	;	 2.2) If EAX = 0 -> Out of memory error 
  2854                              <1> 	;	            (number of free pages is less than requested number)
  2855                              <1> 	;	      ECX = Total number of free bytes (free pages * 4096) 
  2856                              <1> 	;		    (It is not number of contiguous free bytes)	
  2857                              <1> 	;
  2858                              <1> 	; (Modified Registers -> EAX, ECX)
  2859                              <1> 	;
  2860                              <1> 	; PURPOSE: Loading a file at memory for copying or running etc.
  2861                              <1> 	; If this procedure returns with cf is set, ECX contains maximum
  2862                              <1> 	; available space and EAX contains the beginning address of it.
  2863                              <1> 	; If EAX has zero, ECX contains total number of free bytes.
  2864                              <1> 	; If requested block has been successfully allocated (by rounding up to
  2865                              <1> 	; the last page border), it must be deallocated later by using
  2866                              <1> 	; 'deallocate_memory_block' procedure.    
  2867                              <1> 
  2868 00005C06 52                  <1> 	push	edx ; *
  2869 00005C07 BAFF0F0000          <1> 	mov	edx, PAGE_SIZE - 1   ; 4095
  2870 00005C0C 01D0                <1> 	add	eax, edx
  2871 00005C0E 01D1                <1> 	add	ecx, edx
  2872 00005C10 C1E90C              <1> 	shr	ecx, PAGE_SHIFT	     ; 12
  2873                              <1> 
  2874                              <1> 	; ECX = number of contiguous pages to be allocated
  2875 00005C13 8B15[50770100]      <1> 	mov	edx, [free_pages]
  2876                              <1> 	; 01/05/2017
  2877                              <1> 	;or	ecx, ecx
  2878                              <1> 	;jz	short amb3
  2879                              <1> 	; If ECX=0, set cf to 1 and return with max. available mem block size
  2880                              <1> 
  2881 00005C19 39D1                <1> 	cmp	ecx, edx
  2882 00005C1B 7760                <1> 	ja	short amb_3
  2883                              <1> 
  2884 00005C1D C1E80C              <1> 	shr	eax, PAGE_SHIFT      ; 12
  2885                              <1> 
  2886 00005C20 89C2                <1> 	mov	edx, eax 	     ; page number
  2887 00005C22 C1EA03              <1> 	shr	edx, 3		     ; to get offset to M.A.T.
  2888                              <1> 				     ; (1 allocation bit = 1 page)
  2889                              <1> 				     ; (1 allocation bytes = 8 pages)
  2890 00005C25 80E2FC              <1> 	and	dl, 0FCh 	     ; clear lower 2 bits
  2891                              <1> 				     ; (to get 32 bit position)	
  2892 00005C28 53                  <1> 	push	ebx ; **
  2893                              <1> amb_0:
  2894 00005C29 890D[00830100]      <1> 	mov	[mem_ipg_count], ecx ; initial (reset) value of page count
  2895 00005C2F 890D[04830100]      <1> 	mov	[mem_pg_count], ecx
  2896 00005C35 31C9                <1> 	xor	ecx, ecx ; 0
  2897 00005C37 890D[08830100]      <1> 	mov	[mem_aperture], ecx ; 0
  2898 00005C3D 890D[0C830100]      <1> 	mov	[mem_max_aperture], ecx ; 0
  2899                              <1> 	
  2900 00005C43 BB00001000          <1> 	mov	ebx, MEM_ALLOC_TBL   ; Memory Allocation Table address.
  2901 00005C48 3B15[54770100]      <1> 	cmp	edx, [next_page]     ; Is the beginning page address lower
  2902                              <1> 				     ; than the address in 'next_page' ?
  2903                              <1> 				     ; (the first/next free page of user space)		
  2904 00005C4E 7208                <1> 	jb	short amb_1
  2905 00005C50 3B15[58770100]      <1> 	cmp 	edx, [last_page]     ; is the beginning page address higher
  2906                              <1> 				     ; than the address in 'last_page' ?
  2907                              <1> 				     ; (end of the memory)		
  2908 00005C56 7606                <1> 	jna	short amb_2	     ; no	
  2909                              <1> amb_1:
  2910 00005C58 8B15[54770100]      <1> 	mov	edx, [next_page]     ; M.A.T. offset (1 M.A.T. byte = 8 pages)
  2911                              <1> amb_2:
  2912 00005C5E 01D3                <1> 	add	ebx, edx
  2913                              <1> 
  2914                              <1> 	; 28/04/2017
  2915                              <1> 	;xor	ecx, ecx
  2916 00005C60 0FBC0B              <1> 	bsf	ecx, [ebx]	     ; 0 to 31
  2917 00005C63 89D0                <1> 	mov	eax, edx
  2918 00005C65 C1E003              <1> 	shl	eax, 3		     ; *8	
  2919 00005C68 01C8                <1> 	add	eax, ecx	     ; beginning page number
  2920                              <1> 
  2921 00005C6A A3[10830100]        <1> 	mov	[mem_pg_pos], eax    ; beginning page no (for curr. mem. aperture)
  2922 00005C6F A3[14830100]        <1>  	mov	[mem_max_pg_pos], eax ; beginning page no for max. mem. aperture
  2923                              <1> 
  2924 00005C74 83E01F              <1> 	and	eax, 1Fh	     ; lower 5 bits only (0 to 31)
  2925                              <1> 				     ; (allocation bit position)	 
  2926 00005C77 750E                <1> 	jnz	short amb_4	     ; 0
  2927 00005C79 B120                <1> 	mov	cl, 32
  2928 00005C7B EB4B                <1> 	jmp	short amb_10
  2929                              <1> 
  2930                              <1> amb_3:	; out_of_memory
  2931 00005C7D 31C0                <1> 	xor	eax, eax ; 0
  2932 00005C7F 89D1                <1> 	mov	ecx, edx ; free pages
  2933 00005C81 C1E10C              <1> 	shl	ecx, PAGE_SHIFT
  2934 00005C84 5A                  <1> 	pop	edx ; *
  2935 00005C85 F9                  <1> 	stc
  2936 00005C86 C3                  <1> 	retn	
  2937                              <1> amb_4:
  2938 00005C87 8B13                <1> 	mov	edx, [ebx]
  2939 00005C89 88C1                <1> 	mov	cl, al ; 1 to 31
  2940 00005C8B D3EA                <1> 	shr	edx, cl
  2941 00005C8D 89D0                <1> 	mov	eax, edx
  2942                              <1> amb_5:
  2943 00005C8F D1E8                <1> 	shr	eax, 1 ; (***)
  2944 00005C91 7317                <1> 	jnc	short amb_7
  2945 00005C93 FF05[08830100]      <1> 	inc	dword [mem_aperture]
  2946 00005C99 FF0D[04830100]      <1> 	dec	dword [mem_pg_count]
  2947 00005C9F 747F                <1> 	jz	short amb_15
  2948                              <1> amb_6:
  2949                              <1> 	; 28/04/2017
  2950 00005CA1 FEC1                <1> 	inc	cl
  2951 00005CA3 80F920              <1> 	cmp	cl, 32
  2952 00005CA6 730D                <1> 	jnb	short amb_9
  2953 00005CA8 EBE5                <1> 	jmp	short amb_5
  2954                              <1> amb_7:
  2955 00005CAA 50                  <1> 	push	eax ; (***) allocation bits (in shifted status)
  2956 00005CAB E828010000          <1> 	call	amb_26 ; set maximum memory aperture (free memory block size)
  2957 00005CB0 58                  <1> 	pop	eax ; (***)
  2958 00005CB1 EBEE                <1> 	jmp	short amb_6
  2959                              <1> amb_8:
  2960                              <1> 	; 28/04/2017
  2961 00005CB3 B120                <1> 	mov	cl, 32
  2962                              <1> amb_9:
  2963 00005CB5 89DA                <1> 	mov	edx, ebx
  2964 00005CB7 81EA00001000        <1> 	sub	edx, MEM_ALLOC_TBL
  2965 00005CBD 3B15[58770100]      <1> 	cmp	edx, [last_page]
  2966 00005CC3 7336                <1> 	jnb	short amb_14 ; contiguous pages not enough
  2967 00005CC5 83C304              <1> 	add	ebx, 4
  2968                              <1> amb_10:
  2969 00005CC8 8B03                <1> 	mov	eax, [ebx]
  2970 00005CCA 21C0                <1> 	and 	eax, eax
  2971 00005CCC 7408                <1>         jz      short amb_11 ; there is not a free page bit in this alloc dword
  2972 00005CCE 40                  <1> 	inc	eax ; 0FFFFFFFFh -> 0
  2973 00005CCF 740C                <1> 	jz	short amb_12 ; all of bits are set (32 free pages)
  2974 00005CD1 48                  <1> 	dec	eax
  2975 00005CD2 28C9                <1> 	sub	cl, cl ; 0
  2976 00005CD4 EBB9                <1> 	jmp	short amb_5
  2977                              <1> amb_11:
  2978 00005CD6 E8FD000000          <1> 	call	amb_26 ; set maximum memory aperture (free memory block size)
  2979 00005CDB EBD8                <1> 	jmp	short amb_9	
  2980                              <1> amb_12:
  2981 00005CDD 390D[04830100]      <1> 	cmp	[mem_pg_count], ecx ; 32
  2982 00005CE3 7306                <1> 	jnb	short amb_13
  2983 00005CE5 8B0D[04830100]      <1> 	mov	ecx, [mem_pg_count]
  2984                              <1> amb_13:
  2985 00005CEB 010D[08830100]      <1> 	add	[mem_aperture], ecx
  2986 00005CF1 290D[04830100]      <1> 	sub	[mem_pg_count], ecx
  2987 00005CF7 7627                <1> 	jna	short amb_15
  2988 00005CF9 EBBA                <1> 	jmp	short amb_9 ; 01/05/2017
  2989                              <1> amb_14:
  2990 00005CFB E8D8000000          <1> 	call	amb_26 ; 28/04/2017
  2991 00005D00 A1[14830100]        <1> 	mov	eax, [mem_max_pg_pos] ; begin address of max. mem aperture	
  2992 00005D05 8B0D[0C830100]      <1> 	mov	ecx, [mem_max_aperture] ; max. (largest) memory aperture
  2993 00005D0B F9                  <1> 	stc
  2994 00005D0C E9BC000000          <1>         jmp     amb_25
  2995                              <1> 
  2996                              <1> allocate_lfb_memory_block:
  2997                              <1> 	; 28/11/2023
  2998                              <1> 	; 20/10/2023 - TRDOS 386 v2.0.7
  2999                              <1> 	; (short way to set the LFB page bits on the M.A.T.)
  3000                              <1> 	; called from 'allocate_lfb_pages_for_kernel' 
  3001 00005D11 A3[10830100]        <1> 	mov	[mem_pg_pos], eax    ; LFB start/base address as page number
  3002 00005D16 890D[08830100]      <1> 	mov	[mem_aperture], ecx  ; number of LFB pages
  3003                              <1> 				     ; (!which overlapping main memory!)
  3004 00005D1C 52                  <1> 	push	edx ; *
  3005 00005D1D 53                  <1> 	push	ebx ; **
  3006 00005D1E EB0B                <1> 	jmp	short amb_16
  3007                              <1> 
  3008                              <1> amb_15: ; OK !
  3009 00005D20 A1[10830100]        <1> 	mov	eax, [mem_pg_pos]    ; Beginning address as page number
  3010 00005D25 8B0D[08830100]      <1> 	mov	ecx, [mem_aperture]  ; Free contiguous page count (>=1)
  3011                              <1> amb_16:
  3012                              <1> 	; allocate contiguous memory pages (via memory allocation table bits)
  3013 00005D2B 89C2                <1> 	mov	edx, eax
  3014                              <1> 	; 25/04/2017
  3015 00005D2D C1EA03              <1> 	shr	edx, 3		 ; 8 pages in one allocation byte
  3016 00005D30 80E2FC              <1> 	and	dl, 0FCh	 ; clear lower 2 bits
  3017                              <1> 				 ; (for dword/32bit positioning)
  3018                              <1> 
  3019 00005D33 BB00001000          <1> 	mov	ebx, MEM_ALLOC_TBL
  3020 00005D38 01D3                <1> 	add	ebx, edx
  3021 00005D3A 83E01F              <1> 	and	eax, 1Fh ; 31
  3022                              <1> 	; 03/04/2016
  3023 00005D3D BA20000000          <1> 	mov	edx, 32
  3024 00005D42 28C2                <1> 	sub	dl, al
  3025 00005D44 39CA                <1> 	cmp	edx, ecx	 ; ecx >= 1
  3026 00005D46 7602                <1> 	jna	short amb_17
  3027 00005D48 89CA                <1> 	mov	edx, ecx
  3028                              <1> amb_17:
  3029 00005D4A 29D1                <1> 	sub	ecx, edx
  3030 00005D4C 51                  <1> 	push	ecx ; ***
  3031 00005D4D 89D1                <1> 	mov	ecx, edx
  3032                              <1> amb_18:		
  3033 00005D4F 0FB303              <1> 	btr	[ebx], eax	 ; The destination bit indexed by the source value
  3034                              <1> 				 ; is copied into the Carry Flag and then cleared
  3035                              <1> 				 ; in the destination.
  3036                              <1> 	; 20/10/2023
  3037                              <1> 	; (for LFB page allocation.. 
  3038                              <1> 	;  -here, to prevent using LFB pages for another allocation later-
  3039                              <1> 	;  /// the destination bit must be 0 -already- ..
  3040                              <1> 	;  so, following 'jnc' is not necessary but i am not removing it
  3041                              <1> 	;  for understanding why free page count is decreased here.) 
  3042                              <1> 	;   
  3043                              <1> 	;jnc	short amb_28 ; requested page is already allocated 
  3044                              <1> 
  3045 00005D52 FF0D[50770100]      <1> 	dec     dword [free_pages] ; 1 page has been allocated (X = X-1) 
  3046                              <1> ;amb_28:	; 20/10/2023
  3047 00005D58 49                  <1> 	dec	ecx
  3048 00005D59 7404                <1> 	jz	short amb_19
  3049 00005D5B FEC0                <1> 	inc	al
  3050 00005D5D EBF0                <1> 	jmp	short amb_18
  3051                              <1> amb_19:	
  3052 00005D5F 59                  <1> 	pop	ecx ; ***
  3053                              <1> 	;and	ecx, ecx ; 0 ?
  3054                              <1> 	;jz	short amb_22	
  3055                              <1> 	; 28/11/2023
  3056 00005D60 E31E                <1> 	jecxz	amb_22
  3057                              <1> 	; 01/04/2016
  3058 00005D62 B020                <1> 	mov	al, 32
  3059                              <1> amb_20:
  3060 00005D64 83C304              <1> 	add	ebx, 4
  3061 00005D67 39C1                <1> 	cmp	ecx, eax ; 32
  3062 00005D69 7305                <1> 	jnb	short amb_21
  3063                              <1> 	; ECX < 32
  3064 00005D6B 28C0                <1> 	sub	al, al ; 0
  3065 00005D6D 50                  <1> 	push	eax ; 0 ***
  3066 00005D6E EBDF                <1> 	jmp	short amb_18
  3067                              <1> amb_21:
  3068 00005D70 2905[50770100]      <1> 	sub	[free_pages], eax   ; [free_pages] = [free_pages] - 32
  3069 00005D76 C70300000000        <1> 	mov	dword [ebx], 0	    ; reset 32 bits
  3070 00005D7C 29C1                <1> 	sub	ecx, eax ; 32
  3071 00005D7E 75E4                <1> 	jnz	short amb_20
  3072                              <1> amb_22:
  3073 00005D80 A1[10830100]        <1> 	mov	eax, [mem_pg_pos]   ; Beginning address as page number
  3074 00005D85 8B0D[08830100]      <1> 	mov	ecx, [mem_aperture] ; Free contiguous page count
  3075                              <1> 	; [next_page] update
  3076 00005D8B 89C2                <1> 	mov	edx, eax
  3077                              <1> 	; 03/04/2016
  3078 00005D8D C1EA03              <1> 	shr	edx, 3		     ; to get offset to M.A.T.
  3079                              <1> 				     ; (1 allocation bit = 1 page)
  3080                              <1> 				     ; (1 allocation bytes = 8 pages)
  3081 00005D90 80E2FC              <1> 	and	dl, 0FCh 	     ; clear lower 2 bits
  3082                              <1> 				     ; (to get 32 bit position)	
  3083 00005D93 3B15[54770100]      <1> 	cmp	edx, [next_page] ; first free page pointer offset
  3084 00005D99 7732                <1> 	ja	short amb_25
  3085 00005D9B BB00001000          <1> 	mov	ebx, MEM_ALLOC_TBL
  3086 00005DA0 833C1300            <1> 	cmp	dword [ebx+edx], 0
  3087 00005DA4 7721                <1> 	ja	short amb_24
  3088 00005DA6 89C2                <1> 	mov	edx, eax
  3089 00005DA8 01CA                <1> 	add	edx, ecx
  3090 00005DAA C1EA03              <1> 	shr	edx, 3
  3091 00005DAD 80E2FC              <1> 	and	dl, 0FCh
  3092                              <1> amb_23:
  3093 00005DB0 833C1300            <1> 	cmp	dword [ebx+edx], 0
  3094 00005DB4 7711                <1> 	ja	short amb_24
  3095 00005DB6 83C204              <1> 	add	edx, 4
  3096 00005DB9 3B15[58770100]      <1> 	cmp	edx, [last_page]    ; last page pointer offset
  3097 00005DBF 76EF                <1> 	jna	short amb_23
  3098 00005DC1 8B15[5C770100]      <1> 	mov	edx, [first_page]   ; (for) beginning of user's space
  3099                              <1> amb_24:
  3100 00005DC7 8915[54770100]      <1> 	mov	[next_page], edx
  3101                              <1> amb_25:
  3102 00005DCD 9C                  <1> 	pushf
  3103 00005DCE C1E00C              <1> 	shl	eax, PAGE_SHIFT	     ; convert to phy. address in bytes
  3104 00005DD1 C1E10C              <1> 	shl	ecx, PAGE_SHIFT	     ; convert to byte counts
  3105 00005DD4 9D                  <1> 	popf
  3106 00005DD5 5B                  <1> 	pop	ebx ; **
  3107 00005DD6 5A                  <1> 	pop	edx ; *
  3108 00005DD7 C3                  <1> 	retn
  3109                              <1> 
  3110                              <1> amb_26:	; set maximum free memory aperture (free memory block size) 
  3111 00005DD8 89DA                <1> 	mov	edx, ebx ; current address
  3112 00005DDA 81EA00001000        <1> 	sub	edx, MEM_ALLOC_TBL ; MAT beginning address
  3113                              <1> 	; 02/04/2016 
  3114 00005DE0 C1E203              <1> 	shl	edx, 3 ; MAT byte offset * 8 = page number base
  3115 00005DE3 01CA                <1> 	add	edx, ecx ; current page number (ecx = 0 to 32)
  3116                              <1> 	;
  3117 00005DE5 A1[08830100]        <1> 	mov	eax, [mem_aperture]
  3118 00005DEA 21C0                <1> 	and	eax, eax
  3119 00005DEC 7421                <1>         jz      short amb_27
  3120 00005DEE C705[08830100]0000- <1>         mov     dword [mem_aperture], 0
  3120 00005DF6 0000                <1>
  3121 00005DF8 3B05[0C830100]      <1> 	cmp	eax, [mem_max_aperture]
  3122 00005DFE 760F                <1> 	jna	short amb_27
  3123 00005E00 A3[0C830100]        <1> 	mov	[mem_max_aperture], eax
  3124                              <1> 	; 25/04/2017
  3125 00005E05 A1[10830100]        <1> 	mov	eax, [mem_pg_pos]
  3126                              <1> 	; EAX = Beginning page number of the max. aperture 
  3127 00005E0A A3[14830100]        <1> 	mov	[mem_max_pg_pos], eax
  3128                              <1> amb_27: 
  3129 00005E0F 8915[10830100]      <1> 	mov	[mem_pg_pos], edx ; current page
  3130                              <1> 
  3131 00005E15 A1[00830100]        <1> 	mov	eax, [mem_ipg_count] ; initial (reset) value of page count
  3132 00005E1A A3[04830100]        <1> 	mov	[mem_pg_count], eax
  3133                              <1> 
  3134 00005E1F C3                  <1> 	retn
  3135                              <1> 
  3136                              <1> deallocate_memory_block_x:
  3137                              <1> 	; 26/11/2023 - TRDOS 386 v2.0.7
  3138                              <1> 	; deallocate pages after rounding up
  3139                              <1> 	; ((audio buffer size etc. may not be rounded up to page boundary)) 
  3140 00005E20 81C1FF0F0000        <1> 	add	ecx, PAGE_SIZE - 1   ; 4095
  3141                              <1> 
  3142                              <1> deallocate_memory_block:
  3143                              <1> 	; 03/04/2016
  3144                              <1> 	; 14/03/2016 (TRDOS 386 = TRDOS v2.0)
  3145                              <1> 	; Deallocating contiguous memory pages (in the kernel's memory space)
  3146                              <1> 	;
  3147                              <1> 	; INPUT -> 
  3148                              <1> 	;	EAX = Beginning address (physical)
  3149                              <1> 	;	ECX = Number of bytes to be deallocated
  3150                              <1> 	;
  3151                              <1> 	; OUTPUT ->
  3152                              <1> 	;	Memory Allocation Table bits will be updated
  3153                              <1> 	;	[free_pages] will be changed (increased)
  3154                              <1> 	;
  3155                              <1> 	; (Modified Registers -> EAX, ECX)
  3156                              <1> 	;
  3157                              <1> 	; PURPOSE: Unloading/Freeing a file -or an allocated memory block- 
  3158                              <1> 	; at memory after copying, running, saving, reading, writing etc.
  3159                              <1> 	;
  3160                              <1> 
  3161 00005E26 52                  <1> 	push	edx ; *
  3162 00005E27 53                  <1> 	push	ebx ; **
  3163                              <1> 
  3164 00005E28 C1E80C              <1> 	shr	eax, PAGE_SHIFT	     ; 12
  3165 00005E2B C1E90C              <1> 	shr	ecx, PAGE_SHIFT	     ; 12
  3166                              <1> 
  3167                              <1> 	; EAX = Beginning page number
  3168                              <1> 	; ECX = Number of contiguous pages to be deallocated
  3169                              <1> damb_0:
  3170                              <1> 	; deallocate contiguous memory pages (via memory allocation table bits)
  3171 00005E2E 89C2                <1> 	mov	edx, eax
  3172 00005E30 C1EA03              <1> 	shr	edx, 3		     ; to get offset to M.A.T.
  3173                              <1> 				     ; (1 allocation bit = 1 page)
  3174                              <1> 				     ; (1 allocation bytes = 8 pages)
  3175 00005E33 80E2FC              <1> 	and	dl, 0FCh 	     ; clear lower 2 bits
  3176                              <1> 				     ; (to get 32 bit position)	
  3177 00005E36 3B15[54770100]      <1> 	cmp	edx, [next_page] ; next free page
  3178 00005E3C 7306                <1> 	jnb	short damb_1
  3179 00005E3E 8915[54770100]      <1> 	mov	[next_page], edx
  3180                              <1> damb_1:
  3181 00005E44 BB00001000          <1> 	mov	ebx, MEM_ALLOC_TBL
  3182 00005E49 01D3                <1> 	add	ebx, edx
  3183 00005E4B 83E01F              <1> 	and	eax, 1Fh ; 31
  3184                              <1> 
  3185                              <1> 	; 03/04/2016
  3186 00005E4E BA20000000          <1> 	mov	edx, 32
  3187 00005E53 28C2                <1> 	sub	dl, al
  3188 00005E55 39CA                <1> 	cmp	edx, ecx
  3189 00005E57 7602                <1> 	jna	short damb_2
  3190 00005E59 89CA                <1> 	mov	edx, ecx
  3191                              <1> damb_2:
  3192 00005E5B 29D1                <1> 	sub	ecx, edx
  3193 00005E5D 51                  <1> 	push	ecx ; ***
  3194 00005E5E 89D1                <1> 	mov	ecx, edx
  3195                              <1> damb_3:		
  3196 00005E60 0FAB03              <1> 	bts	[ebx], eax	     ; unlink/release/deallocate page
  3197                              <1> 				     ; set relevant bit to 1.
  3198                              <1> 				     ; set CF to the previous bit value	
  3199 00005E63 FF05[50770100]      <1> 	inc     dword [free_pages]   ; 1 page has been deallocated (X = X+1) 
  3200 00005E69 49                  <1> 	dec	ecx
  3201 00005E6A 7404                <1> 	jz	short damb_4
  3202 00005E6C FEC0                <1> 	inc	al
  3203 00005E6E EBF0                <1> 	jmp	short damb_3
  3204                              <1> damb_4:	
  3205 00005E70 59                  <1> 	pop	ecx ; ***
  3206 00005E71 21C9                <1> 	and	ecx, ecx ; 0 ?
  3207 00005E73 741E                <1> 	jz	short damb_7
  3208                              <1> 	; 03/04/2016
  3209 00005E75 B020                <1> 	mov	al, 32
  3210                              <1> damb_5:
  3211 00005E77 83C304              <1> 	add	ebx, 4
  3212 00005E7A 39C1                <1> 	cmp	ecx, eax ; 32
  3213 00005E7C 7305                <1> 	jnb	short damb_6
  3214                              <1> 	; ECX < 32
  3215 00005E7E 28C0                <1> 	sub	al, al ; 0
  3216 00005E80 50                  <1> 	push	eax ; 0 ***
  3217 00005E81 EBDD                <1> 	jmp	short damb_3
  3218                              <1> damb_6:
  3219 00005E83 0105[50770100]      <1> 	add	[free_pages], eax ; [free_pages] = [free_pages] + 32
  3220 00005E89 C703FFFFFFFF        <1> 	mov	dword [ebx], 0FFFFFFFFh ; set 32 bits
  3221 00005E8F 29C1                <1> 	sub	ecx, eax ; 32
  3222 00005E91 75E4                <1> 	jnz	short damb_5
  3223                              <1> damb_7:
  3224 00005E93 5B                  <1> 	pop	ebx ; **
  3225 00005E94 5A                  <1> 	pop	edx ; *
  3226 00005E95 C3                  <1> 	retn
  3227                              <1> 
  3228                              <1> direct_memory_access:
  3229                              <1> 	; 20/10/2023
  3230                              <1> 	; 17/04/2021 (temporary modifications)
  3231                              <1> 	; 22/07/2017
  3232                              <1> 	; 12/05/2017
  3233                              <1> 	; 16/07/2016
  3234                              <1> 	; 12/07/2016 (TRDOS 386 = TRDOS v2.0)
  3235                              <1> 	; This processure will be called to map
  3236                              <1> 	; user's (ring 3) page tables to access phsical
  3237                              <1> 	; (flat/linear) memory addresses, directly (without
  3238                              <1> 	;  kernel's data transfer functions).
  3239                              <1> 	; 
  3240                              <1> 	; Purpose: Video memory access and shared memory access.
  3241                              <1> 	;
  3242                              <1> 	; INPUT -> 
  3243                              <1> 	;	EAX = Beginning address (physical).
  3244                              <1> 	;	EBX = User's buffer address ; 12/05/2017
  3245                              <1> 	;	ECX = Number of contiguous pages to be mapped.
  3246                              <1> 	; OUTPUT ->
  3247                              <1> 	;	User's page directory and pages tables
  3248                              <1> 	;	will be updated.
  3249                              <1> 	;	
  3250                              <1> 	;	If an old page table entry has valid page address, 
  3251                              <1> 	;	that page will be deallocated just before PTE will
  3252                              <1> 	;	be changed for direct (1 to 1) memory page access.
  3253                              <1> 	;
  3254                              <1> 	;	If old PTE value points to a swapped page,
  3255                              <1>         ;       that page (block) will be unlinked on swap disk. 
  3256                              <1> 	;
  3257                              <1> 	;	Newly allocated pages (except page tables) will not
  3258                              <1> 	;	be applied to Memory Allocation Table.
  3259                              <1> 	;	AVL bit 1 (PTE bit 10) of page table entry will be
  3260                              <1> 	;	used to indicate shared (direct) memory page; then,
  3261                              <1> 	;	this page will not be deallocated later during
  3262                              <1> 	;	process termination. (Memory Allocation Table and
  3263                              <1> 	;	free memory count will not be affected.
  3264                              <1> 	;	(Except deallocating page table's itself.)
  3265                              <1> 	;	
  3266                              <1> 	;      CF = 1 -> error (EAX = error code)
  3267                              <1> 	;      CF = 0 -> success (EAX = beginning address)
  3268                              <1> 	;
  3269                              <1> 	;; (Modified Registers -> none)
  3270                              <1> 	; Modified registers: ebp, edx, ecx, ebx, esi, edi	
  3271                              <1> 	;
  3272                              <1> 
  3273                              <1> 	;push	ebp
  3274                              <1> 	;push	ebx
  3275                              <1> 	;push	ecx
  3276                              <1> 	;push	edx
  3277 00005E96 662500F0            <1> 	and	ax, PTE_A_CLEAR ; clear page offset
  3278 00005E9A 50                  <1> 	push	eax
  3279                              <1> 	;and	ecx, ecx ; page count
  3280                              <1> 	;jz	dmem_acc_7  ; 'insufficient memory' error
  3281 00005E9B 89C5                <1> 	mov	ebp, eax
  3282 00005E9D 81C300004000        <1> 	add	ebx, CORE ; 12/05/2017
  3283                              <1> dmem_acc_0: 
  3284 00005EA3 891D[AC8D0100]      <1> 	mov	[base_addr], ebx ; 12/05/2017
  3285 00005EA9 A1[74010300]        <1> 	mov	eax, [u.pgdir] ; page dir address (physical)
  3286 00005EAE E852F9FFFF          <1> 	call	get_pte
  3287                              <1> 		; EDX = Page table entry address (if CF=0)
  3288                              <1> 	        ;       Page directory entry address (if CF=1)
  3289                              <1> 		;       (Bit 0 value is 0 if PT is not present)
  3290                              <1> 		; EAX = Page table entry value (page address)
  3291                              <1> 		;	CF = 1 -> PDE not present or invalid ? 	
  3292 00005EB3 7321                <1> 	jnc	short dmem_acc_1
  3293                              <1> 	; 20/10/2023
  3294                              <1> 	; Allocate a page as a new page table
  3295 00005EB5 E839F8FFFF          <1> 	call	allocate_page
  3296                              <1> 	;jc	dmem_acc_7  ; 'insufficient memory' error
  3297                              <1> 	; 17/04/2021
  3298 00005EBA 7215                <1> 	jc	short _dmem_acc_7
  3299                              <1> 	;
  3300 00005EBC E8A3F8FFFF          <1> 	call 	clear_page
  3301                              <1> 	; EAX = Physical (base) address of the allocated (new) page
  3302 00005EC1 0C07                <1> 	or	al, PDE_A_PRESENT + PDE_A_WRITE + PDE_A_USER ; 4+2+1 = 7
  3303                              <1> 			   ; lower 3 bits are used as U/S, R/W, P flags
  3304                              <1> 			   ; (user, writable, present page)	
  3305 00005EC3 8902                <1> 	mov	[edx], eax ; Let's put the new page directory entry here !
  3306 00005EC5 A1[74010300]        <1> 	mov	eax, [u.pgdir]	
  3307 00005ECA E836F9FFFF          <1> 	call	get_pte
  3308                              <1>         ;jc	dmem_acc_7 ; 'insufficient memory' error
  3309                              <1> 	; 17/04/2021
  3310 00005ECF 7305                <1> 	jnc	short dmem_acc_1
  3311                              <1> _dmem_acc_7:
  3312 00005ED1 E985000000          <1> 	jmp	dmem_acc_7
  3313                              <1> dmem_acc_1:
  3314                              <1> 	; EAX = PTE value, EDX = PTE address
  3315 00005ED6 A801                <1> 	test 	al, PTE_A_PRESENT
  3316                              <1> 	;jnz	short dmem_acc_2   ; 17/04/2021 (*)
  3317                              <1> 	; 17/04/2021 (temporary)
  3318 00005ED8 745F                <1> 	jz	short short dmem_acc_6  ; ! temporary ! (*)	
  3319                              <1> 	; 20/10/2023
  3320                              <1> 	; If the page table entry is zero or invalid -not present-
  3321                              <1> 	; it will be directy allocated for the physical memory section
  3322                              <1> 	; without using the M.A.T. (Specially for LFB access -generally-
  3323                              <1> 	; is at the beyod of the physical main memory end.)
  3324                              <1> 	; (M.A.T bits are not used for direct memory access. To cancel
  3325                              <1> 	; direct memory access also is out of the M.A.T scope because
  3326                              <1> 	; direct accessed physical pages are marked as SHARED on their
  3327                              <1> 	; PTE. Shared pages are not dealloaced.)
  3328                              <1> 
  3329                              <1> ; 17/04/2021
  3330                              <1> ; (following code is disabled as temporary)
  3331                              <1> ;
  3332                              <1> ;	or	eax, eax
  3333                              <1> ;	jz	short dmem_acc_6   ; Change PTE
  3334                              <1> ;	shr	eax, 1		; swap disk block (8 sectors) address
  3335                              <1> ;	; unlink swap disk block
  3336                              <1> ;	call	unlink_swap_block
  3337                              <1> ;	jmp	short dmem_acc_6
  3338                              <1> 
  3339                              <1> dmem_acc_2:
  3340 00005EDA A802                <1> 	test	al, PTE_A_WRITE   ; bit 1, writable (r/w) flag
  3341                              <1> 				  ; (must be 1)
  3342 00005EDC 7550                <1> 	jnz	short dmem_acc_4
  3343                              <1> 	; Read only -duplicated- page (belongs to a parent or a child)
  3344 00005EDE 66A90002            <1>         test    ax, PTE_DUPLICATED ; Was this page duplicated 
  3345                              <1> 				   ; as child's page ?
  3346 00005EE2 7455                <1> 	jz	short dmem_acc_5 ; Change PTE but don't deallocate the page!
  3347                              <1> 
  3348                              <1> 	;push	edi
  3349                              <1> 	;push	esi
  3350                              <1> 
  3351 00005EE4 51                  <1> 	push	ecx
  3352                              <1> 	;push	ebx
  3353 00005EE5 8B1D[78010300]      <1> 	mov	ebx, [u.ppgdir] ; parent's page dir address (physical)
  3354                              <1> 	
  3355                              <1> 	; check the parent's PTE value is read only & same page or not.. 
  3356 00005EEB 89EF                <1> 	mov	edi, ebp
  3357 00005EED C1EF16              <1> 	shr	edi, PAGE_D_SHIFT ; 22
  3358                              <1> 	; EDI = page directory entry index (0-1023)
  3359 00005EF0 89EE                <1> 	mov	esi, ebp
  3360 00005EF2 C1EE0C              <1> 	shr	esi, PAGE_SHIFT ; 12	
  3361 00005EF5 81E6FF030000        <1> 	and	esi, PTE_MASK
  3362                              <1> 	; ESI = page table entry index (0-1023)
  3363                              <1> 
  3364 00005EFB 66C1E702            <1> 	shl	di, 2 ; * 4
  3365 00005EFF 01FB                <1> 	add	ebx, edi ; PDE offset (for the parent)
  3366 00005F01 8B0F                <1> 	mov	ecx, [edi]
  3367 00005F03 F6C101              <1> 	test	cl, PDE_A_PRESENT ; present (valid) or not ?
  3368 00005F06 7425                <1> 	jz	short dmem_acc_3	; parent process does not use this page
  3369 00005F08 6681E100F0          <1> 	and	cx, PDE_A_CLEAR ; 0F000h ; Clear attribute bits
  3370 00005F0D 66C1E602            <1> 	shl	si, 2 ; *4 
  3371 00005F11 01CE                <1> 	add	esi, ecx ; PTE offset (for the parent)
  3372 00005F13 8B1E                <1> 	mov	ebx, [esi]
  3373 00005F15 F6C301              <1> 	test	bl, PTE_A_PRESENT ; present or not ?
  3374 00005F18 7413                <1> 	jz	short dmem_acc_3	; parent process does not use this page
  3375 00005F1A 662500F0            <1> 	and	ax, PTE_A_CLEAR ; 0F000h ; Clear attribute bits 
  3376 00005F1E 6681E300F0          <1> 	and	bx, PTE_A_CLEAR ; 0F000h ; Clear attribute bits
  3377 00005F23 39D8                <1> 	cmp	eax, ebx	; parent's and child's pages are same ?
  3378 00005F25 7506                <1> 	jne	short dmem_acc_3	; not same page
  3379                              <1> 				; deallocate the child's page
  3380 00005F27 800E02              <1>         or      byte [esi], PTE_A_WRITE ; convert to writable page (parent)
  3381                              <1> 	;pop	ebx
  3382 00005F2A 59                  <1> 	pop	ecx
  3383 00005F2B EB0C                <1> 	jmp	short dmem_acc_5
  3384                              <1> dmem_acc_3:
  3385                              <1> 	;pop	ebx
  3386 00005F2D 59                  <1> 	pop	ecx
  3387                              <1> dmem_acc_4:	
  3388 00005F2E 66A90004            <1> 	test	ax, PTE_SHARED ; shared or direct memory access indicator
  3389 00005F32 7505                <1> 	jnz	short dmem_acc_5   ; AVL bit 1 = 1, do not deallocate this page!
  3390                              <1> 	;
  3391                              <1> 	;and	ax, PTE_A_CLEAR ; 0F000h ; clear lower 12 (attribute) bits
  3392 00005F34 E879F9FFFF          <1> 	call	deallocate_page
  3393                              <1> dmem_acc_5:
  3394                              <1> 	;pop	esi
  3395                              <1> 	;pop	edi
  3396                              <1> dmem_acc_6:
  3397 00005F39 89E8                <1> 	mov	eax, ebp ; physical page (offset=0) address
  3398                              <1> 	; EAX = memory page address
  3399                              <1> 	; EDX = PTE entry address (physical)
  3400 00005F3B 660D0704            <1> 	or	ax, PTE_A_PRESENT+PTE_A_USER+PTE_A_WRITE+PTE_SHARED
  3401                              <1> 			; present flag, bit 0 = 1
  3402                              <1> 			; user flag, bit 2 = 1	
  3403                              <1> 			; writable flag, bit 1 = 1
  3404                              <1> 			; direct memory access flag, bit 10 = 1
  3405                              <1> 			; (This page must not be deallocated!)
  3406 00005F3F 8902                <1> 	mov	[edx], eax  ; Update PTE value
  3407 00005F41 49                  <1> 	dec	ecx ; remain count of contiguous pages
  3408 00005F42 741E                <1> 	jz	short dmem_acc_8
  3409 00005F44 81C500100000        <1> 	add	ebp, PAGE_SIZE ; next physical page address
  3410                              <1> 	; 22/07/2017
  3411                              <1> 	;mov	eax, ebp
  3412                              <1> 	; 12/05/2017
  3413 00005F4A 8B1D[AC8D0100]      <1> 	mov	ebx, [base_addr] ; linear address (virtual+CORE)
  3414 00005F50 81C300100000        <1> 	add	ebx, PAGE_SIZE	; next linear address
  3415 00005F56 E948FFFFFF          <1>         jmp     dmem_acc_0
  3416                              <1> dmem_acc_7:  ; ERROR ! 
  3417 00005F5B C7042404000000      <1> 	mov	dword [esp], ERR_MINOR_IM 
  3418                              <1> 		; Insufficient memory (minor) error!
  3419                              <1> 		; Major error = 0 (No protection fault)	
  3420                              <1> 	; cf = 1
  3421                              <1> dmem_acc_8:
  3422 00005F62 58                  <1> 	pop	eax
  3423                              <1> 	;pop	edx
  3424                              <1> 	;pop	ecx
  3425                              <1> 	;pop	ebx
  3426                              <1> 	;pop	ebp
  3427 00005F63 C3                  <1> 	retn
  3428                              <1> 
  3429                              <1> deallocate_user_pages:
  3430                              <1> 	; 20/05/2017
  3431                              <1> 	; 15/05/2017
  3432                              <1> 	; 20/02/2017
  3433                              <1> 	; 19/02/2017 (TRDOS 386 = TRDOS v2.0)
  3434                              <1> 	;
  3435                              <1> 	; Deallocate virtually contiguous user pages (memory block)
  3436                              <1> 	; (caller: 'sysdalloc' system call)
  3437                              <1> 	;
  3438                              <1> 	; INPUT ->
  3439                              <1> 	;	EBX = VIRTUAL ADDRESS (beginning address)
  3440                              <1> 	;	ECX = byte count
  3441                              <1> 	;	[u.pgdir] = user's page directory
  3442                              <1> 	;	[u.ppdir] = parent's page directory
  3443                              <1> 	;
  3444                              <1> 	; OUTPUT ->
  3445                              <1> 	;    If CF = 0 	
  3446                              <1> 	;	EAX = Deallocated memory bytes
  3447                              <1> 	;	  (Even if shared or read only pages will not be
  3448                              <1> 	;	   deallocated on M.A.T., this byte count will be
  3449                              <1> 	;	   returned as virtually deallocated bytes; in fact
  3450                              <1> 	;	   virtually deallocated user pages * 4096.) 
  3451                              <1> 	;	EBX = Virtual address (as rounded up)
  3452                              <1> 	;    If CF = 1    	
  3453                              <1> 	;	EAX = 0 (there is not any deallocated pages)
  3454                              <1> 	;
  3455                              <1> 	; Note: Empty page tables will not be deallocated!!!
  3456                              <1> 	;     (they will be deallocated at process termination stage)
  3457                              <1> 	;
  3458                              <1> 	; Modified Registers -> EAX, EDX, ESI, EDI, EBX, ECX, EBP
  3459                              <1> 	;
  3460 00005F64 89DE                <1> 	mov	esi, ebx
  3461 00005F66 89F7                <1> 	mov	edi, esi
  3462 00005F68 01CF                <1> 	add	edi, ecx
  3463 00005F6A 81C6FF0F0000        <1> 	add	esi, PAGE_SIZE - 1  ; 4095 (round up)	
  3464 00005F70 C1EE0C              <1> 	shr	esi, PAGE_SHIFT
  3465 00005F73 C1EF0C              <1> 	shr	edi, PAGE_SHIFT
  3466 00005F76 89F8                <1> 	mov	eax, edi ; end page
  3467 00005F78 29F0                <1> 	sub	eax, esi ; end page - start page
  3468 00005F7A 0F86C8000000        <1> 	jna	da_u_pd_err  ; < 1
  3469 00005F80 89F3                <1> 	mov	ebx, esi
  3470 00005F82 C1E30C              <1> 	shl	ebx, PAGE_SHIFT ; virtual address (as rounded up)
  3471 00005F85 53                  <1> 	push	ebx ; *
  3472 00005F86 89C1                <1> 	mov	ecx, eax ; page count
  3473 00005F88 C1E00C              <1> 	shl	eax, PAGE_SHIFT ; byte count as adjusted
  3474 00005F8B 50                  <1> 	push	eax ; **
  3475 00005F8C 8B1D[74010300]      <1> 	mov	ebx, [u.pgdir] ; physical addr of user's page dir
  3476 00005F92 81C600040000        <1>  	add	esi, CORE/PAGE_SIZE 
  3477 00005F98 89F7                <1> 	mov	edi, esi
  3478 00005F9A 81E7FF030000        <1> 	and	edi, PTE_MASK ; PTE entry in the page table
  3479 00005FA0 57                  <1> 	push	edi ; *** ; PTE index (of page directory)
  3480 00005FA1 C1EE0A              <1> 	shr	esi, PAGE_D_SHIFT - PAGE_SHIFT ; 22-12=10
  3481 00005FA4 89F2                <1> 	mov	edx, esi 
  3482                              <1> 	; EDX = PDE index
  3483 00005FA6 C1E602              <1> 	shl	esi, 2 ; convert PDE index to dword offset
  3484 00005FA9 01DE                <1> 	add	esi, ebx ; add page directory address
  3485                              <1> da_u_pd_1:
  3486 00005FAB AD                  <1> 	lodsd
  3487                              <1> 	;
  3488 00005FAC 89F5                <1> 	mov	ebp, esi ; 20/02/2017
  3489                              <1> 	; EBP = next PDE address
  3490                              <1> 	;
  3491 00005FAE A801                <1> 	test	al, PDE_A_PRESENT ; bit 0, present flag (must be 1)
  3492 00005FB0 0F8487000000        <1> 	jz	da_u_pd_3 ; 20/05/2017	
  3493 00005FB6 662500F0            <1> 	and	ax, PDE_A_CLEAR ; 0F000h ; clear lower 12 (attribute) bits
  3494                              <1> 	; EAX = PHYSICAL (flat) ADDRESS OF THE PAGE TABLE
  3495 00005FBA 8B3C24              <1> 	mov	edi, [esp] ; ***
  3496                              <1> 	; EDI = PTE index (of complete page directory)
  3497                              <1> 	;and	edi, PTE_MASK ; PTE entry in the page table
  3498 00005FBD C1E702              <1> 	shl	edi, 2 ; convert PTE index to dword offset
  3499 00005FC0 89FE                <1> 	mov	esi, edi ; PTE offset in page table (0-4092)
  3500 00005FC2 01C6                <1> 	add	esi, eax ; now, esi points to requested PTE
  3501                              <1> da_u_pt_0:
  3502 00005FC4 AD                  <1> 	lodsd
  3503 00005FC5 A801                <1> 	test	al, PTE_A_PRESENT ; bit 0, present flag (must be 1)
  3504 00005FC7 7452                <1> 	jz	short da_u_pt_1
  3505                              <1> 	;
  3506 00005FC9 A802                <1> 	test	al, PTE_A_WRITE   ; bit 1, writable (r/w) flag
  3507                              <1> 				  ; (must be 1)
  3508 00005FCB 753C                <1> 	jnz	short da_u_pt_3
  3509                              <1> 	; Read only -duplicated- page (belongs to a parent or a child)
  3510 00005FCD 66A90002            <1>         test    ax, PTE_DUPLICATED ; Was this page duplicated 
  3511                              <1> 				   ; as child's page ?
  3512 00005FD1 7441                <1> 	jz	short da_u_pt_4 ; Clear PTE but don't deallocate the page!
  3513                              <1> 	;
  3514                              <1> 	; check the parent's PTE value is read only & same page or not.. 
  3515                              <1> 	; EDX = page directory entry index (0-1023)
  3516 00005FD3 52                  <1> 	push	edx ; ****
  3517                              <1> 	; EDI = page table entry offset (0-4092)
  3518 00005FD4 8B1D[78010300]      <1> 	mov	ebx, [u.ppgdir] ; page directory of the parent process
  3519 00005FDA 66C1E202            <1> 	shl	dx, 2 ; *4 
  3520 00005FDE 01D3                <1> 	add	ebx, edx ; PDE address (for the parent)
  3521 00005FE0 8B13                <1> 	mov	edx, [ebx] ; page table address
  3522 00005FE2 F6C201              <1> 	test	dl, PDE_A_PRESENT ; present (valid) or not ?
  3523 00005FE5 7421                <1> 	jz	short da_u_pt_2	; parent process does not use this page
  3524 00005FE7 6681E200F0          <1> 	and	dx, PDE_A_CLEAR ; 0F000h ; Clear attribute bits
  3525                              <1> 	; EDI = page table entry offset (0-4092)
  3526 00005FEC 01D7                <1> 	add	edi, edx	; PTE address (for the parent)
  3527 00005FEE 8B1F                <1> 	mov	ebx, [edi]
  3528 00005FF0 F6C301              <1> 	test	bl, PTE_A_PRESENT ; present or not ?
  3529 00005FF3 7413                <1> 	jz	short da_u_pt_2	; parent process does not use this page
  3530 00005FF5 662500F0            <1> 	and	ax, PTE_A_CLEAR ; 0F000h ; Clear attribute bits 
  3531 00005FF9 6681E300F0          <1> 	and	bx, PTE_A_CLEAR ; 0F000h ; Clear attribute bits
  3532 00005FFE 39D8                <1> 	cmp	eax, ebx	; parent's and child's pages are same ?
  3533 00006000 7506                <1> 	jne	short da_u_pt_2	; not same page
  3534                              <1> 				; deallocate the child's page
  3535 00006002 800F02              <1>         or      byte [edi], PTE_A_WRITE ; convert to writable page (parent)
  3536 00006005 5A                  <1> 	pop	edx ; ****
  3537 00006006 EB0C                <1> 	jmp	short da_u_pt_4
  3538                              <1> 
  3539                              <1> ; 17/04/2021
  3540                              <1> ; ('da_u_pt_1' is disabled as temporary)
  3541                              <1> 
  3542                              <1> ;da_u_pt_1:
  3543                              <1> ;	or	eax, eax	; swapped page ?
  3544                              <1> ;	jz	short da_u_pt_5	; no
  3545                              <1> ;				; yes
  3546                              <1> ;	shr	eax, 1
  3547                              <1> ;	call	unlink_swap_block ; Deallocate swapped page block
  3548                              <1> ;				  ; on the swap disk (or in file)
  3549                              <1> ;	jmp	short da_u_pt_5
  3550                              <1> da_u_pt_2:
  3551 00006008 5A                  <1> 	pop	edx ; ****
  3552                              <1> da_u_pt_3:
  3553 00006009 66A90004            <1> 	test	ax, PTE_SHARED	; shared or direct memory access indicator
  3554 0000600D 7505                <1> 	jnz	short da_u_pt_4	; AVL bit 1 = 1, do not deallocate this page!
  3555                              <1> 	;
  3556                              <1> 	;and	ax, PTE_A_CLEAR ; 0F000h ; clear lower 12 (attribute) bits
  3557 0000600F E89EF8FFFF          <1> 	call	deallocate_page ; set the mem allocation bit of this page
  3558                              <1> da_u_pt_4:
  3559 00006014 C746FC00000000      <1> 	mov	dword [esi-4], 0 ; clear/reset PTE (child, dupl. as parent)
  3560                              <1> ; 17/04/2021 (temporary)
  3561                              <1> da_u_pt_1:
  3562                              <1> da_u_pt_5:
  3563                              <1> 	; 20/05/2017
  3564 0000601B 58                  <1> 	pop	eax ; *** PTE index (of page directory)
  3565 0000601C 49                  <1> 	dec	ecx ; remain page count
  3566 0000601D 7426                <1> 	jz	short da_u_pd_4
  3567 0000601F 40                  <1> 	inc	eax ; next PTE
  3568 00006020 6625FF03            <1> 	and	ax, PTE_MASK ; PTE entry index in the page table
  3569 00006024 50                  <1> 	push	eax ; *** (save again)
  3570                              <1> 	;mov	edi, eax
  3571                              <1> 	;and 	di, PTE_MASK
  3572                              <1> 	;cmp	edi, PAGE_SIZE / 4 ; 1024
  3573                              <1> 	;jnb	short da_u_pd_2
  3574 00006025 89C7                <1> 	mov	edi, eax
  3575 00006027 C1E702              <1> 	shl	edi, 2 ; convert index to dword offset
  3576                              <1> 	;test	ax, PTE_MASK ; 3FFh
  3577 0000602A 09C0                <1> 	or	eax, eax
  3578 0000602C 7596                <1> 	jnz	short da_u_pt_0 ; 1-1023
  3579                              <1> da_u_pd_2:
  3580 0000602E 42                  <1> 	inc	edx
  3581                              <1> 	; 20/05/2017
  3582 0000602F 6681E2FF03          <1> 	and	dx, PTE_MASK  ; 3FFh
  3583 00006034 740F                <1> 	jz	short da_u_pd_4  ; 0 (1024)
  3584                              <1> 	;cmp	edx, 1024
  3585                              <1> 	;jnb	short da_u_pd_4
  3586 00006036 89EE                <1> 	mov	esi, ebp ; 20/02/2017
  3587 00006038 E96EFFFFFF          <1> 	jmp	da_u_pd_1
  3588                              <1> da_u_pd_3:
  3589                              <1> 	; 15/05/2017 (empty page directory entry)
  3590 0000603D 81E900040000        <1> 	sub	ecx, 1024
  3591 00006043 77E9                <1> 	ja	short da_u_pd_2 ; 20/05/2017
  3592                              <1> da_u_pd_4:
  3593 00006045 58                  <1> 	pop	eax ; **
  3594 00006046 5B                  <1> 	pop	ebx ; *
  3595 00006047 C3                  <1> 	retn
  3596                              <1> 
  3597                              <1> da_u_pd_err:
  3598 00006048 31C0                <1> 	xor	eax, eax
  3599 0000604A F9                  <1> 	stc	
  3600 0000604B C3                  <1> 	retn
  3601                              <1> 
  3602                              <1> allocate_user_pages:
  3603                              <1> 	; 20/05/2017
  3604                              <1> 	; 01/05/2017, 02/05/2017, 15/05/2017
  3605                              <1> 	; 04/03/2017
  3606                              <1> 	; 20/02/2017 (TRDOS 386 = TRDOS v2.0)
  3607                              <1> 	;
  3608                              <1> 	; Allocate physically contiguous user pages (memory block)
  3609                              <1> 	; (caller: 'sysalloc' system call)
  3610                              <1> 	;
  3611                              <1> 	; Note: This procedure does not alloc a page's itself
  3612                              <1> 	;	(page bits) on Memory Allocation Table.
  3613                              <1> 	;	(allocate_memory_block is needed before this proc)
  3614                              <1> 	;
  3615                              <1> 	; INPUT ->
  3616                              <1> 	;	EAX = PHYSICAL ADDRESS (beginning address)
  3617                              <1> 	;	EBX = VIRTUAL ADDRESS (beginning address)
  3618                              <1> 	;	ECX = byte count (>=4096)
  3619                              <1> 	;	[u.pgdir] = user's page directory
  3620                              <1> 	;	
  3621                              <1> 	;	Note: All addresses are (must be) already adjusted
  3622                              <1> 	;	to page	borders, otherwise, lower 12bits of addresses
  3623                              <1> 	;	and byte count would be truncated.
  3624                              <1> 	;
  3625                              <1> 	; OUTPUT ->
  3626                              <1> 	;	none
  3627                              <1> 	;
  3628                              <1> 	;	CF = 1 -> insufficient memory error
  3629                              <1> 	;
  3630                              <1> 	; Note: All pages will be allocated in physical page order 
  3631                              <1> 	;	from the beginning page address. 
  3632                              <1> 	;	* A new page table will be added to the page dir
  3633                              <1> 	;	  when the requested PDE is invalid.
  3634                              <1> 	;	* Those pages will not be added to swap queue
  3635                              <1> 	;	  because main purpose of this allocation is to
  3636                              <1> 	;	  set a direct memory access (DMA controller) buffer.
  3637                              <1> 	;	 (Swapping out a page in a DMA buffer would be wrong!)
  3638                              <1> 	;	* Previous content of page tables (PTEs) would be
  3639                              <1> 	;	  (should be) deallocated before entering this
  3640                              <1> 	;	  procedure. So, new page table entries (PTEs)
  3641                              <1> 	;	  directly will be written without checking
  3642                              <1> 	;	  their previous content.	
  3643                              <1> 	;	* Only solution to increase free memory by removing
  3644                              <1> 	;	  that non-swappable memory block is to terminate
  3645                              <1> 	;	  the process or to wait until the process will 
  3646                              <1> 	;	  deallocate that memory block as itself. ('sysdalloc')
  3647                              <1> 	;	  (No problem, if the process does not grab all of
  3648                              <1> 	;	  -very big amount of- free memory by using
  3649                              <1> 	;	  'sysalloc' system call!?)
  3650                              <1> 	;	  (Even if the process has grabbed all of free memory, 
  3651                              <1> 	;	  no problem if the process is not running in 
  3652                              <1> 	;	  multitasking mode. No problem in multitasking
  3653                              <1> 	;	  mode if there is not another process which is running
  3654                              <1> 	;	  or waiting or sleeping for an event as it's pages
  3655                              <1> 	;	  are swapped-out. But a new process can not start to
  3656                              <1> 	;	  run if all of free memory has beeen allocated 
  3657                              <1> 	;	  by running processes. Deallocation -'sysdalloc'- 
  3658                              <1> 	;	  or terminate a running process is needed 
  3659                              <1> 	;	  in order to run a new process.) 
  3660                              <1> 	;
  3661                              <1> 	; Modified Registers -> EAX, EDX, ESI, EDI, EBX, ECX, EBP
  3662                              <1> 	;
  3663                              <1> 
  3664                              <1> 	; 01/05/2017
  3665 0000604C 662500F0            <1> 	and	ax, ~PAGE_OFF
  3666 00006050 6681E300F0          <1> 	and	bx, ~PAGE_OFF
  3667                              <1> 	; 02/05/2017 
  3668 00006055 BD00F0FFFF          <1> 	mov	ebp, 0FFFFF000h ; 4 Giga Bytes - 4096 Bytes (for Stack)
  3669 0000605A C1E90C              <1> 	shr	ecx, PAGE_SHIFT ; page count
  3670 0000605D 83F901              <1> 	cmp	ecx, 1
  3671 00006060 7251                <1> 	jb	short a_u_im_retn
  3672 00006062 89C2                <1> 	mov	edx, eax
  3673 00006064 01CA                <1> 	add	edx, ecx
  3674 00006066 724B                <1> 	jc	short a_u_im_retn
  3675 00006068 39D5                <1> 	cmp	ebp, edx
  3676 0000606A 7247                <1> 	jb	short a_u_im_retn
  3677 0000606C 89DA                <1> 	mov	edx, ebx
  3678 0000606E 81C200004000        <1> 	add	edx, CORE
  3679 00006074 723D                <1> 	jc	short a_u_im_retn	
  3680 00006076 01CA                <1> 	add	edx, ecx
  3681 00006078 7239                <1> 	jc	short a_u_im_retn
  3682 0000607A 39D5                <1> 	cmp	ebp, edx
  3683 0000607C 7235                <1> 	jb	short a_u_im_retn
  3684                              <1> 	;
  3685 0000607E 89C5                <1> 	mov	ebp, eax ; physical address
  3686 00006080 89DE                <1> 	mov	esi, ebx
  3687 00006082 81C600004000        <1> 	add	esi, CORE ; start of user's memory (4M) 
  3688 00006088 C1EE0C              <1> 	shr	esi, PAGE_SHIFT ; higher 20 bits of the linear address
  3689                              <1> 	;shr	ecx, PAGE_SHIFT ; page count
  3690 0000608B 8B1D[74010300]      <1> 	mov	ebx, [u.pgdir] ; physical addr of user's page dir
  3691 00006091 89F7                <1> 	mov	edi, esi
  3692 00006093 81E7FF030000        <1> 	and	edi, PTE_MASK ; PTE entry index in the page table
  3693 00006099 57                  <1> 	push	edi  ; * ; PTE index (in page directory)
  3694 0000609A C1EE0A              <1> 	shr	esi, PAGE_D_SHIFT - PAGE_SHIFT ; 22-12=10
  3695 0000609D 89F2                <1> 	mov	edx, esi 
  3696                              <1> 	; EDX = PDE index
  3697 0000609F C1E602              <1> 	shl	esi, 2 ; convert PDE index to dword offset
  3698 000060A2 01DE                <1> 	add	esi, ebx ; add page directory address
  3699                              <1> a_u_pd_0:
  3700 000060A4 AD                  <1> 	lodsd
  3701                              <1> 	;
  3702 000060A5 89F3                <1> 	mov	ebx, esi ; next PDE address
  3703                              <1> 	;
  3704 000060A7 A801                <1> 	test	al, PDE_A_PRESENT ; bit 0, present flag (must be 1)
  3705 000060A9 7513                <1> 	jnz	short a_u_pd_2
  3706                              <1> 	;
  3707                              <1> 	; empty PDE (it does not point to valid page table address)
  3708 000060AB E843F6FFFF          <1> 	call	allocate_page  ; (allocate a new page table)
  3709 000060B0 7302                <1> 	jnc	short a_u_pd_1 ; OK... now, we have a new page table.
  3710                              <1> 	; cf = 1
  3711                              <1> 	; There is not a free memory page to allocate a new page table !!!
  3712 000060B2 5E                  <1> 	pop	esi ; *
  3713                              <1> a_u_im_retn:
  3714 000060B3 C3                  <1> 	retn	; return to 'sysalloc' with 'insufficient memory' error
  3715                              <1> 	;
  3716                              <1> a_u_pd_1: ; clear the new page table content 
  3717                              <1> 	; EAX = Physical (base) address of the new page table
  3718 000060B4 E8ABF6FFFF          <1> 	call	clear_page ; Clear page content
  3719                              <1> 	;
  3720 000060B9 0C07                <1> 	or	al, PDE_A_PRESENT + PDE_A_WRITE + PDE_A_USER
  3721                              <1> 		 ; set bit 0, bit 1 and bit 2 to 1
  3722                              <1> 		 ; (present, writable, user)
  3723 000060BB 8946FC              <1> 	mov	[esi-4], eax
  3724                              <1> a_u_pd_2:
  3725 000060BE 662500F0            <1> 	and	ax, PDE_A_CLEAR ; 0F000h ; clear lower 12 (attribute) bits
  3726                              <1> 	; EAX = PHYSICAL (flat) ADDRESS OF THE PAGE TABLE
  3727 000060C2 8B3C24              <1> 	mov	edi, [esp] ; *
  3728                              <1> 	; EDI = PTE index (of page directory)
  3729                              <1> 	;and	edi, PTE_MASK ; PTE entry index in the page table	
  3730                              <1> 	; EBX = next PDE address
  3731 000060C5 89FE                <1> 	mov	esi, edi ; PTE index in page table (0-1023)
  3732 000060C7 C1E702              <1> 	shl	edi, 2 ; convert PTE index to dword offset
  3733 000060CA 01C7                <1> 	add	edi, eax ; now, edi points to requested PTE
  3734                              <1> a_u_pt_0:
  3735                              <1> 	; 02/05/2017
  3736 000060CC 8B07                <1> 	mov	eax, [edi]
  3737                              <1> 	;
  3738 000060CE A801                <1> 	test	al, PTE_A_PRESENT ; bit 0, present flag (must be 1)
  3739 000060D0 7445                <1> 	jz	short a_u_pt_1
  3740                              <1> 	;
  3741 000060D2 A802                <1> 	test	al, PTE_A_WRITE   ; bit 1, writable (r/w) flag
  3742                              <1> 				  ; (must be 1)
  3743 000060D4 7550                <1> 	jnz	short a_u_pt_3
  3744                              <1> 	; Read only -duplicated- page (belongs to a parent or a child)
  3745 000060D6 66A90002            <1>         test    ax, PTE_DUPLICATED ; Was this page duplicated 
  3746                              <1> 				   ; as child's page ?
  3747 000060DA 7455                <1> 	jz	short a_u_pt_4	; Clear PTE but don't deallocate the page!
  3748                              <1> 	;
  3749                              <1> 	; check the parent's PTE value is read only & same page or not.. 
  3750                              <1> 	; EDX = page directory entry index (0-1023)
  3751 000060DC 52                  <1> 	push	edx ; **
  3752 000060DD 53                  <1> 	push	ebx ; ***
  3753                              <1> 	; ESI = page table entry index (0-1023)
  3754                              <1> 	;push	esi ; **** ; 20/05/2017
  3755 000060DE 8B1D[78010300]      <1> 	mov	ebx, [u.ppgdir] ; page directory of the parent process
  3756 000060E4 66C1E202            <1> 	shl	dx, 2 ; *4 
  3757 000060E8 01D3                <1> 	add	ebx, edx ; PTE address,0 (for the parent)
  3758 000060EA 8B13                <1> 	mov	edx, [ebx] ; page table address
  3759 000060EC F6C201              <1> 	test	dl, PDE_A_PRESENT ; present (valid) or not ?
  3760 000060EF 7433                <1> 	jz	short a_u_pt_2	; parent process does not use this page
  3761 000060F1 6681E200F0          <1> 	and	dx, PDE_A_CLEAR ; 0F000h ; Clear attribute bits
  3762 000060F6 66C1E602            <1> 	shl	si, 2 ; *4
  3763                              <1> 	; ESI = page table entry offset (0-4092)
  3764 000060FA 01D6                <1> 	add	esi, edx	; PTE address (for the parent)
  3765 000060FC 8B1E                <1> 	mov	ebx, [esi]
  3766 000060FE F6C301              <1> 	test	bl, PTE_A_PRESENT ; present or not ?
  3767 00006101 7421                <1> 	jz	short a_u_pt_2	; parent process does not use this page
  3768 00006103 662500F0            <1> 	and	ax, PTE_A_CLEAR ; 0F000h ; Clear attribute bits 
  3769 00006107 6681E300F0          <1> 	and	bx, PTE_A_CLEAR ; 0F000h ; Clear attribute bits
  3770 0000610C 39D8                <1> 	cmp	eax, ebx	; parent's and child's pages are same ?
  3771 0000610E 7514                <1> 	jne	short a_u_pt_2	; not same page
  3772                              <1> 				; deallocate the child's page
  3773 00006110 800E02              <1>         or      byte [esi], PTE_A_WRITE ; convert to writable page (parent)
  3774                              <1> 	;pop	esi ; **** ; 20/05/2017
  3775 00006113 5B                  <1> 	pop	ebx ; ***
  3776 00006114 5A                  <1> 	pop	edx ; **
  3777 00006115 EB1A                <1> 	jmp	short a_u_pt_4
  3778                              <1> a_u_pt_1:
  3779 00006117 09C0                <1> 	or	eax, eax	; swapped page ?
  3780 00006119 7416                <1> 	jz	short a_u_pt_4	; no
  3781                              <1> 				; yes
  3782 0000611B D1E8                <1> 	shr	eax, 1
  3783 0000611D E8AFF9FFFF          <1> 	call	unlink_swap_block ; Deallocate swapped page block
  3784                              <1> 				  ; on the swap disk (or in file)
  3785 00006122 EB0D                <1> 	jmp	short a_u_pt_4
  3786                              <1> a_u_pt_2:
  3787                              <1> 	;pop	esi ; **** ; 20/05/2017
  3788 00006124 5B                  <1> 	pop	ebx ; ***
  3789 00006125 5A                  <1> 	pop	edx ; **
  3790                              <1> a_u_pt_3:
  3791 00006126 66A90004            <1> 	test	ax, PTE_SHARED	; shared or direct memory access indicator
  3792 0000612A 7505                <1> 	jnz	short a_u_pt_4	; AVL bit 1 = 1, do not deallocate this page!
  3793                              <1> 	;
  3794                              <1> 	;and	ax, PTE_A_CLEAR ; 0F000h ; clear lower 12 (attribute) bits
  3795 0000612C E881F7FFFF          <1> 	call	deallocate_page ; set the mem allocation bit of this page
  3796                              <1> 	;
  3797                              <1> a_u_pt_4:
  3798 00006131 89E8                <1> 	mov	eax, ebp ; physical address
  3799 00006133 0C07                <1> 	or	al, PTE_A_PRESENT + PTE_A_WRITE + PTE_A_USER ; 04/03/2017
  3800 00006135 AB                  <1> 	stosd
  3801 00006136 5E                  <1> 	pop	esi ; * ; 20/05/2017
  3802 00006137 49                  <1> 	dec	ecx ; remain page count
  3803 00006138 7417                <1> 	jz	short a_u_pd_5
  3804 0000613A 81C500100000        <1> 	add	ebp, PAGE_SIZE
  3805 00006140 46                  <1> 	inc	esi ; next PTE (index)
  3806                              <1> 	; 20/05/2017
  3807                              <1> 	;cmp	esi, PAGE_SIZE/4 ; 1024
  3808                              <1> 	;jb	short a_u_pt_0
  3809 00006141 6681E6FF03          <1> 	and	si, PTE_MASK ; 3FFh (0 to 1023)
  3810 00006146 56                  <1> 	push	esi ; *
  3811 00006147 7583                <1> 	jnz	short a_u_pt_0 ; > 0 (<1024)
  3812                              <1> a_u_pd_3:
  3813 00006149 42                  <1> 	inc	edx
  3814                              <1> ;	cmp	edx, 1024
  3815                              <1> ;	jnb	short a_u_pd_4 ; 02/05/2017 (error!, ecx > 0)
  3816 0000614A 89DE                <1> 	mov	esi, ebx ; the next PDE address
  3817 0000614C E953FFFFFF          <1> 	jmp	a_u_pd_0
  3818                              <1> a_u_pd_4:
  3819                              <1> 	; 02/05/2017
  3820                              <1> ;	stc
  3821                              <1> a_u_pd_5:
  3822                              <1> 	; 20/05/2017
  3823                              <1> 	;pop	edi ; *
  3824 00006151 C3                  <1> 	retn
  3825                              <1> 
  3826                              <1> 	; 28/11/2023
  3827                              <1> ;a_lfb_k__err:
  3828                              <1> 	;retn
  3829                              <1> 
  3830                              <1> allocate_lfb_pages_for_kernel:
  3831                              <1> 	; 29/11/2023
  3832                              <1> 	; 28/11/2023
  3833                              <1> 	; 20/10/2023 - TRDOS 386 v2.0.7
  3834                              <1> 	; (only the overlapped main memory pages will be allocated)
  3835                              <1> 	; 28/11/2023
  3836                              <1> 	; (but all LFB pages will be added to the kernel's page tables)
  3837                              <1> 	; (NOTE: LFB size -which will be used- is the size of the max.
  3838                              <1> 	;  recognized screen resolution. For example: 1024*768*4 bytes)
  3839                              <1> 	; 15/12/2020
  3840                              <1> 	; 14/12/2020 - TRDOS 386 v2.0.3
  3841                              <1> 	; Set kernel page tables for linear frame buffer 
  3842                              <1> 	;
  3843                              <1> 	; Input:
  3844                              <1> 	;	;[LFB_ADDR] = linear frame buffer base address
  3845                              <1> 	;	;[LFB_SIZE] = linear frame buffer size in bytes
  3846                              <1> 	;	; 29/11/2023
  3847                              <1> 	;	;ebx = Linear frame buffer base address as page num
  3848                              <1> 	;	; 20/10/2023
  3849                              <1> 	;	esi = linear frame buffer base address
  3850                              <1> 	;	ecx = memory size in pages = [memory_size]
  3851                              <1> 	;	; 28/11/2023
  3852                              <1> 	;	edx = linear frame buffer size in pages
  3853                              <1> 	; Output:
  3854                              <1> 	;	none
  3855                              <1> 	;	cf = 1 -> error
  3856                              <1> 	;
  3857                              <1> 	; Modified registers: eax, ebx, ecx, edx, esi, edi, ebp
  3858                              <1> 
  3859                              <1> 	; 29/11/2023
  3860                              <1> 	; allocate LFB blocks which < memory size at first
  3861                              <1> 	
  3862                              <1> 	;mov	eax, edx
  3863                              <1> 	;shl	eax, 12
  3864                              <1> 	;add	eax, esi
  3865                              <1> 	;jc	short a_lfb_k__err ; > 4GB limit
  3866                              <1> 	;
  3867                              <1> 	;;mov	eax, 1048576 ; page count of (full) 4GB memory
  3868                              <1> 	;;sub	eax, edx
  3869                              <1> 	;;cmp	eax, esi
  3870                              <1> 	;jb	short a_lfb_k__err ; > 4GB limit
  3871                              <1> 
  3872 00006152 89F3                <1> 	mov	ebx, esi ; LFB base/start address
  3873 00006154 C1EB0C              <1> 	shr	ebx, 12	 ; convert byte address to page address
  3874                              <1> 	; ebx = LFB start/base page number 
  3875                              <1> 
  3876 00006157 29D9                <1> 	sub	ecx, ebx
  3877 00006159 761C                <1> 	jna	short a_lfb_k_2 ; skip M.A.T. bit allocation 
  3878 0000615B 39D1                <1> 	cmp	ecx, edx
  3879 0000615D 7602                <1> 	jna	short a_lfb_k_0
  3880 0000615F 89D1                <1> 	mov	ecx, edx
  3881                              <1> a_lfb_k_0:
  3882 00006161 29CA                <1> 	sub	edx, ecx
  3883 00006163 7607                <1> 	jna	short a_lfb_k_1
  3884                              <1> 
  3885                              <1> 	; edx = remain count of LFB pages which are out of the M.A.T. 
  3886                              <1> 	; ebx = LFB start/base page number
  3887                              <1> 	; ecx = page allocation count in the M.A.T.
  3888                              <1> 
  3889                              <1> 	;mov	eax, 4096
  3890                              <1> 	;mul	ecx
  3891 00006165 89C8                <1> 	mov	eax, ecx
  3892 00006167 C1E00C              <1> 	shl	eax, 12 ; * 4096
  3893                              <1> 
  3894 0000616A 01C6                <1> 	add	esi, eax
  3895                              <1> 	; esi = LFB address just after the main memory if there is	
  3896                              <1> a_lfb_k_1:
  3897 0000616C 89D8                <1> 	mov	eax, ebx ; LFB start/base page number
  3898 0000616E E89EFBFFFF          <1> 	call	allocate_lfb_memory_block
  3899                              <1> 
  3900                              <1> 	; here if there is, remain (the 2nd) part of the LFB 
  3901                              <1> 	; will be allocated by using new kernel page table(s)
  3902                              <1> 	; (but M.A.T. bits will not be cleared because 
  3903                              <1> 	;  the 2nd LFB part is out of the M.A.T.)	
  3904                              <1> 	
  3905 00006173 21D2                <1> 	and	edx, edx
  3906 00006175 745D                <1> 	jz	short a_lfb_k_6  ; all LFB pages have been allocated
  3907                              <1> 
  3908                              <1> a_lfb_k_2:
  3909                              <1> 	; 29/11/2023
  3910 00006177 C1EE0C              <1> 	shr	esi, 12	; convert LFB address to page number
  3911                              <1> 	; edx = count of pages to be added (in kernel page tables)
  3912                              <1> 	; 28/11/2023
  3913 0000617A 89D5                <1> 	mov	ebp, edx
  3914 0000617C 81C2FF030000        <1> 	add	edx, 1023 ; round up
  3915 00006182 C1EA0A              <1> 	shr	edx, 10	  ; / 1024
  3916                              <1> 	; edx = count of kernel page tables to be added
  3917                              <1> 	; (edx = 1 or edx = 2)
  3918                              <1> 	; ((1024*768*4 = 3145728 bytes, 768 PTEs, 1 page table))
  3919                              <1> 	; ((1920*1080*4 = 8294400 bytes, 2025 PTEs, 2 page tables)) 
  3920 00006185 E869F5FFFF          <1> 	call	allocate_page
  3921                              <1> 	;jc	short a_lfb_k__err
  3922                              <1> 	; (mem alloc error is not expected at this startup stage)
  3923                              <1> 	; eax = physical address of the new page table
  3924 0000618A 89F7                <1> 	mov	edi, esi  ; LFB start/base page number
  3925                              <1> 	;add	edi, 1023
  3926 0000618C C1EF0A              <1> 	shr	edi, 10
  3927                              <1> 	; edi = PDE entry number of the Linear Frame Buffer addr
  3928                              <1> 	; (edi = 832 for 0D0000000h, edi = 896 for 0E0000000h)
  3929 0000618F C1E702              <1> 	shl	edi, 2
  3930                              <1> 	; edi = PDE offset
  3931 00006192 033D[48770100]      <1> 	add	edi, [k_page_dir] ; Kernel's Page Dir Address
  3932 00006198 50                  <1> 	push	eax ; +
  3933 00006199 660D0304            <1> 	or	ax, PDE_A_PRESENT + PDE_A_WRITE + PDE_EXTERNAL
  3934                              <1> 				; supervisor + read&write + present
  3935                              <1> 				; + external memory block (LFB)
  3936 0000619D AB                  <1> 	stosd
  3937                              <1> 
  3938 0000619E 4A                  <1> 	dec	edx
  3939 0000619F 740C                <1> 	jz	short a_lfb_k_3	; only 1 new page table
  3940                              <1> 
  3941                              <1> 	; the 2nd page table
  3942 000061A1 E84DF5FFFF          <1> 	call	allocate_page
  3943                              <1> 	;jc	short a_lfb_k__err
  3944                              <1> 	; (mem alloc error is not expected at this startup stage)
  3945                              <1> 	; eax = physical address of the new page table
  3946 000061A6 89C3                <1> 	mov	ebx, eax
  3947 000061A8 660D0304            <1> 	or	ax, PDE_A_PRESENT + PDE_A_WRITE + PDE_EXTERNAL
  3948                              <1> 				; supervisor + read&write + present
  3949                              <1> 				; + external memory block (LFB)
  3950 000061AC AB                  <1> 	stosd
  3951                              <1> 
  3952                              <1> a_lfb_k_3:
  3953                              <1> 	; set new PTEs
  3954                              <1> 	;
  3955                              <1> 	; ebp = count of pages (PTEs) to be allocated
  3956 000061AD 5F                  <1> 	pop	edi ; +	 ; 1st page table address	
  3957                              <1> 	; 29/11/2023
  3958 000061AE B900040000          <1> 	mov	ecx, 1024	; number of PTEs in a page table
  3959 000061B3 89F0                <1> 	mov	eax, esi	; LFB base/start page number
  3960                              <1> 			 	; (may be the 2nd part of the LFB)
  3961 000061B5 C1E00C              <1> 	shl	eax, 12
  3962 000061B8 660D0304            <1> 	or	ax, PTE_A_PRESENT + PTE_A_WRITE + PTE_EXTERNAL
  3963                              <1> 				; supervisor + read&write + present
  3964                              <1> 				; + external memory block (LFB)
  3965                              <1> a_lfb_k_4:
  3966 000061BC AB                  <1> 	stosd			; save as PTE
  3967 000061BD 4D                  <1> 	dec	ebp
  3968 000061BE 740D                <1> 	jz	short a_lfb_k_5
  3969 000061C0 0500100000          <1> 	add	eax, 4096	; the next page address
  3970 000061C5 E2F5                <1> 	loop	a_lfb_k_4
  3971                              <1> 	
  3972                              <1> 	;and	ebx, ebx
  3973                              <1> 	;jz	short a_lfb_k_6
  3974 000061C7 89DF                <1> 	mov	edi, ebx	; the 2nd page table address
  3975                              <1> 	;xor	ebx, ebx
  3976                              <1> 	;mov	ecx, 1024
  3977 000061C9 B504                <1> 	mov	ch, 4 ; cx = 4*256 = 1024
  3978 000061CB EBEF                <1> 	jmp	short a_lfb_k_4 ; only 1 more loop (no the 3rd pt)
  3979                              <1> 				; (ebp <= 1024 here)
  3980                              <1> a_lfb_k_5:
  3981 000061CD 49                  <1> 	dec	ecx
  3982 000061CE 7404                <1> 	jz	short a_lfb_k_6
  3983 000061D0 31C0                <1> 	xor	eax, eax	; clear page table entry (empty)
  3984 000061D2 F3AB                <1> 	rep	stosd
  3985                              <1> a_lfb_k_6:
  3986                              <1> 	; 29/11/2023
  3987 000061D4 C3                  <1> 	retn
  3988                              <1> 
  3989                              <1> ; 28/11/2023
  3990                              <1> %if 0 
  3991                              <1> 
  3992                              <1> allocate_lfb_pages_for_kernel:
  3993                              <1> 	; 20/10/2023 - TRDOS 386 v2.0.7
  3994                              <1> 	; (only the overlapped main memory pages will be allocated)
  3995                              <1> 	; ((if LFB base/start address is greater than -or equal to-
  3996                              <1> 	;      main memory size, this procedure is not called/used)) 
  3997                              <1> 	; 15/12/2020
  3998                              <1> 	; 14/12/2020 - TRDOS 386 v2.0.3
  3999                              <1> 	; Set kernel page tables for linear frame buffer 
  4000                              <1> 	;
  4001                              <1> 	; Input:
  4002                              <1> 	;	;[LFB_ADDR] = linear frame buffer base address
  4003                              <1> 	;	;[LFB_SIZE] = linear frame buffer size in bytes
  4004                              <1> 	;	; 20/10/2023
  4005                              <1> 	;	eax = Linear frame buffer base address as page num
  4006                              <1> 	;	      (eax < memory size)
  4007                              <1> 	;	esi = linear frame buffer base address
  4008                              <1> 	;	ecx = memory size in pages = [memory_size]
  4009                              <1> 	; Output:
  4010                              <1> 	;	none
  4011                              <1> 	;	cf = 1 -> error
  4012                              <1> 	;
  4013                              <1> 	; Modified registers: eax, ecx, edx, edi
  4014                              <1> 
  4015                              <1> 	; 20/10/2023
  4016                              <1> 	;mov	edi, [LFB_ADDR]
  4017                              <1> 	;mov	edx, [LFB_SIZE]
  4018                              <1> 
  4019                              <1> 	;;;
  4020                              <1> 	; 20/10/2023
  4021                              <1> 	mov	edi, eax ; LFB base/start page number
  4022                              <1> 	;mov	ecx, [memory_size]
  4023                              <1> 	sub	ecx, eax	
  4024                              <1> 
  4025                              <1> 	; ecx = number of pages to be set as (already) allocated 
  4026                              <1> 	;;;
  4027                              <1> 
  4028                              <1> 	; 20/10/2023
  4029                              <1> 	shr	edi, 10 ; convert page number to PDE entry number
  4030                              <1> 			; (1024 pages per page table -the shift
  4031                              <1> 			; result is a page table index number
  4032                              <1> 			; or page directory entry number <= 1023)
  4033                              <1> 	;shr	edi, 22	; convert address to page number
  4034                              <1> 			; and then convert it to PDE entry offset
  4035                              <1> 			; (1 PDE is for 4MB, 22 bit shift)
  4036                              <1> 
  4037                              <1> 	shl	di, 2	; * 4 to obtain the PDE offset
  4038                              <1> 
  4039                              <1> 	; 20/10/2023
  4040                              <1> 	;;add	edx, 4095
  4041                              <1> 	;shr	edx, 12	; convert LFB size to LFB page count
  4042                              <1> 	
  4043                              <1> 	;mov	ecx, edx ; * ; LFB page count
  4044                              <1> 	; 20/10/2023
  4045                              <1> 	mov	edx, ecx ; *
  4046                              <1> 			; 20/10/2023
  4047                              <1> 			; edx = page count (to be set as allocated)
  4048                              <1> 			; 	from the LFB start page
  4049                              <1> 			; (it may be <= linear frame buffer size) 
  4050                              <1> 
  4051                              <1> 	add	ecx, 1023 ; page count + 1023
  4052                              <1> 	shr	ecx, 10 ; convert to page directory entry count	
  4053                              <1> 			; (page table count)
  4054                              <1> 	push	ecx ; **
  4055                              <1> 	shl	ecx, 12 ; convert to byte count
  4056                              <1> 
  4057                              <1> 	; 20/10/2023
  4058                              <1> 	; (absolute allocation is needed instead of the first fit)
  4059                              <1> 	;xor	eax, eax ; first available pages
  4060                              <1> 	
  4061                              <1> 	; 20/10/2023
  4062                              <1> 	;mov	esi, [LFB_ADDR]
  4063                              <1> 	mov	eax, esi ; linear frame buffer's base/start address	
  4064                              <1> 
  4065                              <1> 	; allocate contiguous memory block for these kernel pages
  4066                              <1> 	
  4067                              <1> 	;call	allocate_memory_block
  4068                              <1> 	; 20/10/2023 
  4069                              <1> 	; (short way to set LFB page bits on the 'M.A.T.)
  4070                              <1> 	call	allocate_lfb_memory_block ; in 'allocate_memory_block'	
  4071                              <1> 
  4072                              <1> 	; eax = start address of (contiguous) memory block
  4073                              <1> 	pop	ecx ; ** ; PDE count
  4074                              <1> 	jnc	short a_lfb_k_1
  4075                              <1> 	; error (cf=1)
  4076                              <1> 	retn
  4077                              <1> a_lfb_k_1:
  4078                              <1> 	; Allocate (new) page tables in kernel's page directory
  4079                              <1> 	push	ecx ; PDE (page table) count
  4080                              <1> 	push	eax ; start address of contiguous memory pages
  4081                              <1> 		    ; (at page boundary)	
  4082                              <1> 	; edi = 1st page directory entry offset
  4083                              <1> 	add	edi, [k_page_dir] ; Kernel's Page Dir Address
  4084                              <1> a_lfb_k_2:
  4085                              <1> 	or	ax, PDE_A_PRESENT + PDE_A_WRITE + PDE_EXTERNAL
  4086                              <1> 				; supervisor + read&write + present 	
  4087                              <1> 				; + external memory block (LFB)
  4088                              <1> 	stosd
  4089                              <1> 	add	eax, 4096
  4090                              <1> 	loop	a_lfb_k_2
  4091                              <1> 	
  4092                              <1> 	pop	edi ; start addr of contiguous memory pages
  4093                              <1> 	pop	ecx ; page table (PDE) count
  4094                              <1> 
  4095                              <1> 	; Allocate pages in (new) kernel page tables
  4096                              <1> 	
  4097                              <1> 	; (Note: page tables are contiguous in pyhsical memory)
  4098                              <1> 	shl	ecx, 10 ; * 1024, convert to (total) PTE count 
  4099                              <1> 	
  4100                              <1> 	mov	eax, [LFB_ADDR]
  4101                              <1> 	; edx = LFB page count
  4102                              <1> 	;and	ax, ~4095  ; lw of LFB address is 0
  4103                              <1> a_lfb_k_3:	
  4104                              <1> 	or	ax, PTE_A_PRESENT + PTE_A_WRITE + PTE_EXTERNAL
  4105                              <1> 				; supervisor + read&write + present 	
  4106                              <1> 				; + external memory block (LFB)
  4107                              <1> 	stosd
  4108                              <1> 	dec	edx
  4109                              <1> 	jz	short a_lfb_k_4 ; LFB size has been completed (!?)
  4110                              <1> 	add	eax, 4096	
  4111                              <1> 	loop	a_lfb_k_3
  4112                              <1> 
  4113                              <1> 	retn
  4114                              <1> 	
  4115                              <1> a_lfb_k_4:
  4116                              <1> 	; clear PTEs for empty/free pages 
  4117                              <1> 	; 	(if there are after LFB !?)
  4118                              <1> 	xor	eax, eax ; clear page table entry (empty)
  4119                              <1> 	rep	stosd
  4120                              <1> 	retn
  4121                              <1> 
  4122                              <1> %endif
  4123                              <1> 
  4124                              <1> ;deallocate_lfb_pages_for_kernel:
  4125                              <1> 	; 15/12/2020
  4126                              <1> 	; 14/12/2020 - TRDOS 386 v2.0.3
  4127                              <1> 	; Reset/Release kernel page tables
  4128                              <1> 	;	 which are used for linear frame buffer 
  4129                              <1> 	; (this procedure will be called by kernel only)
  4130                              <1> 	;
  4131                              <1> 	; Input:
  4132                              <1> 	;	[LFB_ADDR] = linear frame buffer base address
  4133                              <1>  	;	[FFB_SIZE] = linear frame buffer size in bytes
  4134                              <1> 	; Output:
  4135                              <1> 	;	none
  4136                              <1> 	;
  4137                              <1> 	; Modified registers: eax, ecx, edi
  4138                              <1> 
  4139                              <1> 	;mov	edi, [LFB_ADDR]
  4140                              <1> 	;mov	ecx, [LFB_SIZE]
  4141                              <1> 	;
  4142                              <1> 	;shr	edi, 22	; convert address to page number
  4143                              <1> 	;		; and then convert it to PDE entry offset
  4144                              <1> 	;		; (1 PDE is for 4MB, 22 bit shift)
  4145                              <1> 	;
  4146                              <1> 	;shl	di, 2	; * 4 for offset 
  4147                              <1> 	;
  4148                              <1> 	;;add	ecx, 4095
  4149                              <1> 	;shr	ecx, 12	; convert LFB size to page count  
  4150                              <1> 	;
  4151                              <1> 	;add	ecx, 1023 ; page count + 1023
  4152                              <1> 	;shr	ecx, 10 ; convert to page directory entry count	
  4153                              <1> 	;		; (page table count)
  4154                              <1> 	;push	ecx ; *
  4155                              <1> 	;shl	ecx, 12 ; convert to byte count
  4156                              <1> 	;
  4157                              <1> 	;xor	eax, eax ; first available pages
  4158                              <1> 	;
  4159                              <1> 	;; deallocate contiguous memory block for kernel pages
  4160                              <1> 	;
  4161                              <1> 	;call	deallocate_memory_block
  4162                              <1> 	;
  4163                              <1> 	;pop	ecx ; * ; PDE count
  4164                              <1> 	;
  4165                              <1> 	;; Release/Free PDEs (page tables) in kernel's page dir
  4166                              <1> 	;; edi = 1st page directory entry offset
  4167                              <1> 	;add	edi, [k_page_dir] ; Kernel's Page Dir Address
  4168                              <1> 	;sub	eax, eax ; clear (also invalidate)
  4169                              <1> 	;rep	stosd
  4170                              <1> 	;
  4171                              <1> 	;retn
  4172                              <1> 
  4173                              <1> ; /// End Of MEMORY MANAGEMENT FUNCTIONS ///
  4174                              <1> 
  4175                              <1> ;; Data:
  4176                              <1> 
  4177                              <1> ; 09/03/2015
  4178                              <1> ;swpq_count: dw 0 ; count of pages on the swap que
  4179                              <1> ;swp_drv:    dd 0 ; logical drive description table address of the swap drive/disk
  4180                              <1> ;swpd_size:  dd 0 ; size of swap drive/disk (volume) in sectors (512 bytes). 		  				
  4181                              <1> ;swpd_free:  dd 0 ; free page blocks (4096 bytes) on swap disk/drive (logical)
  4182                              <1> ;swpd_next:  dd 0 ; next free page block
  4183                              <1> ;swpd_last:  dd 0 ; last swap page block
  3109                                  %include 'timer.s'   ; 17/01/2015
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel) - v2.0.5 - timer.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 08/08/2022  (Previous: 18/04/2021)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 17/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Turkish Rational DOS
    11                              <1> ; Operating System Project v2.0 by ERDOGAN TAN (Beginning: 04/01/2016)
    12                              <1> ;
    13                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    14                              <1> ;
    15                              <1> ; Derived from 'IBM PC-AT' BIOS source code (1985) 
    16                              <1> ; ****************************************************************************
    17                              <1> 
    18                              <1> ; TRDOS 386  (TRDOS v2.0) Kernel - TIMER & REAL TIME CLOCK (BIOS) FUNCTIONS
    19                              <1> 
    20                              <1> ; IBM PC-AT BIOS Source Code ('BIOS2.ASM')
    21                              <1> ; TITLE BIOS2 ---- 06/10/85 BIOS INTERRUPT ROUTINES
    22                              <1> 
    23                              <1> ;-------------------------------------------------------------------------------
    24                              <1> ;
    25                              <1> ; ///////// TIMER (& REAL TIME CLOCK) FUNCTIONS ///////////////
    26                              <1> 
    27                              <1> int1Ah:
    28                              <1> 	; 29/01/2016
    29                              <1> 	; 17/01/2016 (TRDOS 386 = TRDOS v2.0)
    30 000061D5 9C                  <1> 	pushfd
    31 000061D6 0E                  <1> 	push 	cs
    32 000061D7 E801000000          <1> 	call 	TIME_OF_DAY_1
    33 000061DC C3                  <1> 	retn
    34                              <1> 
    35                              <1> ;-------------------------------------------------------------------------------
    36                              <1> 
    37                              <1> ;--- INT 1A H -- (TIME OF DAY) --------------------------------------------------
    38                              <1> ;       THIS BIOS ROUTINE ALLOWS THE CLOCKS TO BE SET OR READ			:
    39                              <1> ;										:
    40                              <1> ; PARAMETERS:									:
    41                              <1> ;     (AH) = 00H  READ THE CURRENT SETTING AND RETURN WITH,			:
    42                              <1> ;                      (CX) = HIGH PORTION OF COUNT				:
    43                              <1> ;                      (DX) = LOW PORTION OF COUNT				:
    44                              <1> ;                      (AL) = 0 TIMER HAS NOT PASSED 24 HOURS SINCE LAST READ	:
    45                              <1> ;                             1 IF ON ANOTHER DAY. (RESET TO ZERO AFTER READ)	:
    46                              <1> ;										:
    47                              <1> ;     (AH) = 01H  SET THE CURRENT CLOCK USING,					:
    48                              <1> ;		     (CX) = HIGH PORTION OF COUNT				:
    49                              <1> ;		     (DX) = LOW PORTION OF COUNT.				:
    50                              <1> ;										:
    51                              <1> ;             NOTE: COUNTS OCCUR AT THE RATE OF 1193180/65536 COUNTS/SECOND	:
    52                              <1> ;                   (OR ABOUT 18.2 PER SECOND -- SEE EQUATES)			:
    53                              <1> ;										:
    54                              <1> ;     (AH) = 02H  READ THE REAL TIME CLOCK AND RETURN WITH,			:
    55                              <1> ;                      (CH) = HOURS IN BCD (00-23)				:
    56                              <1> ;                      (CL) = MINUTES IN BCD (00-59)				:
    57                              <1> ;                      (DH) = SECONDS IN BCD (00-59)				:
    58                              <1> ;                      (DL) = DAYLIGHT SAVINGS ENABLE (00-01)			:
    59                              <1> ;										:
    60                              <1> ;     (AH) = 03H  SET THE REAL TIME CLOCK USING,				:
    61                              <1> ;                     (CH) = HOURS IN BCD (00-23)				:
    62                              <1> ;                     (CL) = MINUTES IN BCD (00-59)				:
    63                              <1> ;                     (DH) = SECONDS IN BCD (00-59)				:
    64                              <1> ;                     (DL) = 01 IF DAYLIGHT SAVINGS ENABLE OPTION, ELSE 00.	:
    65                              <1> ;										:
    66                              <1> ;             NOTE: (DL) = 00 IF DAYLIGHT SAVINGS TIME ENABLE IS NOT ENABLED.	:
    67                              <1> ;                   (DL) = 01 ENABLES TWO SPECIAL UPDATES THE LAST SUNDAY IN	:
    68                              <1> ;	            APRIL   (1:59:59 --> 3:00:00 AM) AND THE LAST SUNDAY IN	:
    69                              <1> ;                   OCTOBER (1:59:59 --> 1:00:00 AM) THE FIRST TIME.		:
    70                              <1> ;										:
    71                              <1> ;     (AH) = 04H  READ THE DATE FROM THE REAL TIME CLOCK AND RETURN WITH,	:
    72                              <1> ;                      (CH) = CENTURY IN BCD (19 OR 20)				:
    73                              <1> ;                      (CL) = YEAR IN BCD (00-99)				:
    74                              <1> ;                      (DH) = MONTH IN BCD (01-12)				:
    75                              <1> ;                      (DL) = DAY IN BCD (01-31).				:
    76                              <1> ;										:
    77                              <1> ;     (AH) = 05H  SET THE DATE INTO THE REAL TIME CLOCK USING,			:
    78                              <1> ;                     (CH) = CENTURY IN BCD (19 OR 20)				:
    79                              <1> ;                     (CL) = YEAR IN BCD (00-99)				:
    80                              <1> ;                     (DH) = MONTH IN BCD (01-12)				:
    81                              <1> ;                     (DL) = DAY IN BCD (01-31).				:
    82                              <1> ;										:
    83                              <1> ;     (AH) = 06H  SET THE ALARM TO INTERRUPT AT SPECIFIED TIME,			:
    84                              <1> ;                     (CH) = HOURS IN BCD (00-23 (OR FFH))			:
    85                              <1> ;                     (CL) = MINUTES IN BCD (00-59 (OR FFH))			:
    86                              <1> ;                     (DH) = SECONDS IN BCD (00-59 (OR FFH))			:
    87                              <1> ;										:
    88                              <1> ;     (AH) = 07H  RESET THE ALARM INTERRUPT FUNCTION.				:
    89                              <1> ;										:
    90                              <1> ; NOTES: FOR ALL RETURNS CY= 0 FOR SUCCESSFUL OPERATION.			:
    91                              <1> ;        FOR (AH)= 2, 4, 6 - CARRY FLAG SET IF REAL TIME CLOCK NOT OPERATING.	:
    92                              <1> ;        FOR (AH)= 6 - CARRY FLAG SET IF ALARM ALREADY ENABLED. 		:
    93                              <1> ;        FOR THE ALARM FUNCTION (AH = 6) THE USER MUST SUPPLY A ROUTINE AND	:
    94                              <1> ;         INTERCEPT THE CORRECT ADDRESS IN THE VECTOR TABLE FOR INTERRUPT 4AH.	:
    95                              <1> ;         USE 0FFH FOR ANY "DO NOT CARE" POSITION FOR INTERVAL INTERRUPTS.	:
    96                              <1> ;        INTERRUPTS ARE DISABLED DURING DATA MODIFICATION. 			:
    97                              <1> ;        AH & AL ARE RETURNED MODIFIED AND NOT DEFINED EXCEPT WHERE INDICATED.	:
    98                              <1> ;--------------------------------------------------------------------------------
    99                              <1> 
   100                              <1> ; 29/07/2022
   101                              <1> ; 15/01/2017
   102                              <1> ; 14/01/2017
   103                              <1> ; 07/01/2017
   104                              <1> ; 02/01/2017
   105                              <1> ; 29/05/2016
   106                              <1> ; 29/01/2016
   107                              <1> ; 17/01/2016 (TRDOS 386 = TRDOS v2.0)
   108                              <1> 
   109                              <1> ; 29/05/2016
   110                              <1> ; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
   111                              <1> int35h:  ; Date/Time functions
   112                              <1> 
   113                              <1> TIME_OF_DAY_1:
   114                              <1> 	; 07/08/5022
   115                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
   116                              <1> 	;sti				; INTERRUPTS BACK ON
   117                              <1> 	; 29/05/2016
   118 000061DD 80642408FE          <1> 	and	byte [esp+8], 11111110b	; clear carry bit of eflags register
   119                              <1> 	;
   120 000061E2 80FC08              <1> 	cmp	ah, (RTC_TBE-RTC_TB)/4	; CHECK IF COMMAND IN VALID RANGE (0-7)
   121 000061E5 F5                  <1> 	cmc				; COMPLEMENT CARRY FOR ERROR EXIT
   122                              <1> 	; (*) jc short TIME_9		; EXIT WITH CARRY = 1 IF NOT VALID
   123 000061E6 721A                <1> 	jc	short _TIME_9 ; 29/05/2016
   124                              <1> 
   125 000061E8 1E                  <1> 	push	ds
   126 000061E9 56                  <1> 	push	esi
   127 000061EA 66BE1000            <1> 	mov	si, KDATA		; kernel data segment
   128 000061EE 8EDE                <1> 	mov	ds, si
   129                              <1> 
   130                              <1> 	;;15/01/2017
   131                              <1> 	; 14/01/2017
   132                              <1> 	; 02/01/2017
   133                              <1> 	;;mov	byte [intflg], 35h	; date & time interrupt 
   134                              <1> 	;sti
   135                              <1> 	;
   136 000061F0 C0E402              <1> 	shl	ah, 2			; convert function to dword offset
   137 000061F3 0FB6F4              <1> 	movzx	esi, ah			; PLACE INTO ADDRESSING REGISTER
   138                              <1> 	;cli				; NO INTERRUPTS DURING TIME FUNCTIONS
   139 000061F6 FF96[08620000]      <1> 	call	[esi+RTC_TB]		; VECTOR TO FUNCTION REQUESTED WITH CY=0
   140                              <1> 					; RETURN WITH CARRY FLAG SET FOR RESULT
   141                              <1> 	;sti				; INTERRUPTS BACK ON
   142 000061FC B400                <1> 	mov	ah, 0			; CLEAR (AH) TO ZERO
   143 000061FE 5E                  <1> 	pop	esi			; RECOVER USERS REGISTER
   144 000061FF 1F                  <1> 	pop	ds			; RECOVER USERS SEGMENT SELECTOR
   145                              <1> 
   146                              <1> 	;;15/01/2017
   147                              <1> 	; 02/01/2017
   148                              <1> 	;;mov	byte [ss:intflg], 0 ; 07/01/2017
   149                              <1> 
   150                              <1> ;TIME_9:
   151                              <1> 					; RETURN WITH CY= 0 IF NO ERROR
   152                              <1> 	; (*) 29/05/2016
   153                              <1> 	; (*) retf 4 ; skip eflags on stack
   154 00006200 7305                <1> 	jnc	short _TIME_10
   155                              <1> _TIME_9:
   156                              <1> 	; 29/05/2016 -set carry flag on stack-
   157                              <1> 	; [esp] = EIP
   158                              <1> 	; [esp+4] = CS
   159                              <1> 	; [esp+8] = E-FLAGS
   160 00006202 804C240801          <1> 	or	byte [esp+8], 1	 ; set carry bit of eflags register
   161                              <1> 	; [esp+12] = ESP (user)
   162                              <1> 	; [esp+16] = SS (User)
   163                              <1> _TIME_10:
   164 00006207 CF                  <1> 	iretd
   165                              <1> 	
   166                              <1> 	; (*) 29/05/2016 - 'ref 4' intruction causes to stack fault
   167                              <1> 	; (OUTER-PRIVILEGE-LEVEL)
   168                              <1> 	; INTEL 80386 PROGRAMMER'S REFERENCE MANUAL 1986
   169                              <1> 	; // RETF instruction:
   170                              <1> 	;
   171                              <1> 	; IF OperandMode=32 THEN
   172                              <1>  	;    Load CS:EIP from stack;
   173                              <1>  	;    Set CS RPL to CPL;
   174                              <1>  	;    Increment eSP by 8 plus the immediate offset if it exists;
   175                              <1>  	;    Load SS:eSP from stack;
   176                              <1>  	; ELSE (* OperandMode=16 *)
   177                              <1>  	;    Load CS:IP from stack;
   178                              <1>  	;    Set CS RPL to CPL;
   179                              <1>  	;    Increment eSP by 4 plus the immediate offset if it exists;
   180                              <1> 	;    Load SS:eSP from stack;
   181                              <1>  	; FI;
   182                              <1> 	;
   183                              <1> 	; //					
   184                              <1> 					; ROUTINE VECTOR TABLE (AH)=
   185                              <1> RTC_TB:
   186 00006208 [28620000]          <1> 	dd	RTC_00			; 0 = READ CURRENT CLOCK COUNT
   187 0000620C [3B620000]          <1> 	dd	RTC_10			; 1 = SET CLOCK COUNT
   188 00006210 [49620000]          <1> 	dd	RTC_20			; 2 = READ THE REAL TIME CLOCK TIME
   189 00006214 [77620000]          <1> 	dd	RTC_30			; 3 = SET REAL TIME CLOCK TIME
   190 00006218 [B4620000]          <1> 	dd	RTC_40			; 4 = READ THE REAL TIME CLOCK DATE
   191 0000621C [DA620000]          <1> 	dd	RTC_50			; 5 = SET REAL TIME CLOCK DATE
   192 00006220 [39630000]          <1> 	dd	RTC_60			; 6 = SET THE REAL TIME CLOCK ALARM
   193 00006224 [8B630000]          <1> 	dd	RTC_70			; 7 = RESET ALARM
   194                              <1> 
   195                              <1> RTC_TBE	equ	$
   196                              <1> 
   197                              <1> RTC_00:				; READ TIME COUNT
   198 00006228 A0[CC770100]        <1> 	mov	al, [TIMER_OFL]		; GET THE OVERFLOW FLAG
   199 0000622D C605[CC770100]00    <1> 	mov	byte [TIMER_OFL], 0	; AND THEN RESET THE OVERFLOW FLAG
   200 00006234 8B0D[C8770100]      <1>         mov     ecx, [TIMER_LH]         ; GET COUNT OF TIME
   201 0000623A C3                  <1> 	retn
   202                              <1> 
   203                              <1> RTC_10:				; SET TIME COUNT
   204 0000623B 890D[C8770100]      <1>         mov     [TIMER_LH], ecx         ; SET TIME COUNT
   205 00006241 C605[CC770100]00    <1> 	mov	byte [TIMER_OFL], 0	; RESET OVERFLOW FLAG
   206 00006248 C3                  <1> 	retn				; RETURN WITH NO CARRY
   207                              <1> 
   208                              <1> RTC_20:				; GET RTC TIME
   209 00006249 E8C7010000          <1> 	call	UPD_IPR			; CHECK FOR UPDATE IN PROCESS
   210 0000624E 7226                <1> 	jc	short RTC_29		; EXIT IF ERROR (CY= 1)
   211                              <1> 
   212 00006250 B000                <1> 	mov	al, CMOS_SECONDS	; SET ADDRESS OF SECONDS
   213 00006252 E8F4010000          <1> 	call	CMOS_READ		; GET SECONDS
   214 00006257 88C6                <1> 	mov	dh, al			; SAVE
   215 00006259 B00B                <1> 	mov	al, CMOS_REG_B		; ADDRESS ALARM REGISTER
   216 0000625B E8EB010000          <1> 	call	CMOS_READ		; READ CURRENT VALUE OF DSE BIT
   217 00006260 2401                <1> 	and	al, 00000001b		; MASK FOR VALID DSE BIT
   218 00006262 88C2                <1> 	mov	dl, al			; SET [DL] TO ZERO FOR NO DSE BIT
   219 00006264 B002                <1> 	mov	al, CMOS_MINUTES	; SET ADDRESS OF MINUTES
   220 00006266 E8E0010000          <1> 	call	CMOS_READ		; GET MINUTES
   221 0000626B 88C1                <1> 	mov	cl, al			; SAVE
   222 0000626D B004                <1>         mov     al, CMOS_HOURS          ; SET ADDRESS OF HOURS
   223                              <1> RTC_41:		; 29/07/2022
   224 0000626F E8D7010000          <1> 	call	CMOS_READ		; GET HOURS
   225 00006274 88C5                <1> 	mov	ch, al			; SAVE
   226                              <1> 	; 29/07/2022
   227                              <1> 	;clc				; SET CY= 0
   228                              <1> RTC_29:
   229 00006276 C3                  <1> 	retn				; RETURN WITH RESULT IN CARRY FLAG
   230                              <1> 
   231                              <1> RTC_30:				; SET RTC TIME
   232 00006277 E899010000          <1> 	call	UPD_IPR			; CHECK FOR UPDATE IN PROCESS
   233 0000627C 7305                <1> 	jnc	short RTC_35		; GO AROUND IF CLOCK OPERATING
   234 0000627E E8AD010000          <1> 	call	RTC_STA			; ELSE TRY INITIALIZING CLOCK
   235                              <1> RTC_35:
   236 00006283 88F4                <1> 	mov	ah, dh			; GET TIME BYTE - SECONDS
   237 00006285 B000                <1> 	mov	al, CMOS_SECONDS	; ADDRESS SECONDS
   238 00006287 E894000000          <1> 	call	CMOS_WRITE		; UPDATE SECONDS
   239 0000628C 88CC                <1> 	mov	ah, cl			; GET TIME BYTE - MINUTES
   240 0000628E B002                <1> 	mov	al, CMOS_MINUTES	; ADDRESS MINUTES
   241 00006290 E88B000000          <1> 	call	CMOS_WRITE		; UPDATE MINUTES
   242 00006295 88EC                <1> 	mov	ah, ch			; GET TIME BYTE - HOURS
   243 00006297 B004                <1> 	mov	al, CMOS_HOURS		; ADDRESS HOURS
   244 00006299 E882000000          <1> 	call	CMOS_WRITE		; UPDATE ADDRESS
   245                              <1> 	;mov	al, CMOS_REG_B		; ADDRESS ALARM REGISTER
   246                              <1> 	;mov	ah, al
   247 0000629E 66B80B0B            <1> 	mov	ax, CMOS_REG_B * 257
   248 000062A2 E8A4010000          <1> 	call	CMOS_READ		; READ CURRENT TIME
   249 000062A7 2462                <1> 	and	al, 01100010b		; MASK FOR VALID BIT POSITIONS
   250 000062A9 0C02                <1> 	or	al, 00000010b		; TURN ON 24 HOUR MODE
   251 000062AB 80E201              <1> 	and	dl, 00000001b		; USE ONLY THE DSE BIT
   252 000062AE 08D0                <1> 	or	al, dl			; GET DAY LIGHT SAVINGS TIME BIT (OSE)
   253 000062B0 86E0                <1> 	xchg	ah, al			; PLACE IN WORK REGISTER AND GET ADDRESS
   254                              <1> 	;call	CMOS_WRITE		; SET NEW ALARM SITS
   255                              <1> 	;clc				; SET CY= 0
   256                              <1> 	;retn				; RETURN WITH CY= 0
   257                              <1> 	; 29/07/2022
   258 000062B2 EB6C                <1> 	jmp	short CMOS_WRITE
   259                              <1> 
   260                              <1> RTC_40:				; GET RTC DATE
   261 000062B4 E85C010000          <1> 	call	UPD_IPR			; CHECK FOR UPDATE IN PROCESS
   262                              <1> 	;jc	short RTC_49		; EXIT IF ERROR (CY= 1)
   263                              <1> 	; 07/08/2022
   264 000062B9 72BB                <1> 	jc	short RTC_29
   265                              <1> 
   266 000062BB B007                <1> 	mov	al, CMOS_DAY_MONTH	; ADDRESS DAY OF MONTH
   267 000062BD E889010000          <1> 	call	CMOS_READ		; READ DAY OF MONTH
   268 000062C2 88C2                <1> 	mov	dl, al			; SAVE
   269 000062C4 B008                <1> 	mov	al, CMOS_MONTH		; ADDRESS MONTH
   270 000062C6 E880010000          <1> 	call	CMOS_READ		; READ MONTH
   271 000062CB 88C6                <1> 	mov	dh, al			; SAVE
   272 000062CD B009                <1> 	mov	al, CMOS_YEAR		; ADDRESS YEAR
   273 000062CF E877010000          <1> 	call	CMOS_READ		; READ YEAR
   274 000062D4 88C1                <1> 	mov	cl, al			; SAVE
   275 000062D6 B032                <1> 	mov	al, CMOS_CENTURY	; ADDRESS CENTURY LOCATION
   276                              <1> ; 29/07/2022
   277                              <1> ;	call	CMOS_READ		; GET CENTURY BYTE
   278                              <1> ;	mov	ch, al			; SAVE
   279                              <1> ;	; 29/07/2022
   280                              <1> ;	;clc				; SET CY=0
   281                              <1> ;RTC_49:
   282                              <1> ;	retn				; RETURN WITH RESULTS IN CARRY FLAG
   283                              <1> 
   284                              <1> 	; 29/07/2022
   285 000062D8 EB95                <1> 	jmp	short RTC_41
   286                              <1> 
   287                              <1> 
   288                              <1> RTC_50:				; SET RTC DATE
   289 000062DA E836010000          <1> 	call	UPD_IPR			; CHECK FOR UPDATE IN PROCESS
   290 000062DF 7305                <1> 	jnc	short RTC_55		; GO AROUND IF NO ERROR
   291 000062E1 E84A010000          <1> 	call	RTC_STA			; ELSE INITIALIZE CLOCK
   292                              <1> RTC_55:
   293 000062E6 66B80600            <1> 	mov	ax, CMOS_DAY_WEEK	; ADDRESS OF DAY OF WEEK BYTE
   294 000062EA E831000000          <1> 	call	CMOS_WRITE		; LOAD ZEROS TO DAY OF WEEK
   295 000062EF 88D4                <1> 	mov	ah, dl			; GET DAY OF MONTH BYTE
   296 000062F1 B007                <1> 	mov	al, CMOS_DAY_MONTH	; ADDRESS DAY OF MONTH BYTE
   297 000062F3 E828000000          <1> 	call	CMOS_WRITE		; WRITE OF DAY OF MONTH REGISTER
   298 000062F8 88F4                <1> 	mov	ah, dh			; GET MONTH
   299 000062FA B008                <1> 	mov	al, CMOS_MONTH		; ADDRESS MONTH BYTE
   300 000062FC E81F000000          <1> 	call	CMOS_WRITE		; WRITE MONTH REGISTER
   301 00006301 88CC                <1> 	mov	ah, cl			; GET YEAR BYTE
   302 00006303 B009                <1> 	mov	al, CMOS_YEAR		; ADDRESS YEAR REGISTER
   303 00006305 E816000000          <1> 	call	CMOS_WRITE		; WRITE YEAR REGISTER
   304 0000630A 88EC                <1> 	mov	ah, ch			; GET CENTURY BYTE
   305 0000630C B032                <1> 	mov	al, CMOS_CENTURY	; ADDRESS CENTURY BYTE
   306 0000630E E80D000000          <1> 	call	CMOS_WRITE		; WRITE CENTURY LOCATION
   307                              <1> 	;mov	al, CMOS_REG_B		; ADDRESS ALARM REGISTER
   308                              <1> 	;mov	ah, al
   309 00006313 66B80B0B            <1> 	mov	ax, CMOS_REG_B * 257
   310 00006317 E82F010000          <1> 	call	CMOS_READ		; READ CURRENT SETTINGS
   311 0000631C 247F                <1> 	and	al, 07Fh		; CLEAR 'SET BIT'
   312 0000631E 86E0                <1> 	xchg	ah, al			; MOVE TO WORK REGISTER
   313                              <1> 	;call	CMOS_WRITE		; AND START CLOCK UPDATING
   314                              <1> 	;clc				; SET CY= 0
   315                              <1> 	;retn				; RETURN CY=0
   316                              <1> 	; 29/07/2022
   317                              <1> 	;jmp	short CMOS_WRITE
   318                              <1> 
   319                              <1> ;-------------------------------------------------------------------------------
   320                              <1> 
   321                              <1> ; 08/08/2022
   322                              <1> ; 29/07/2022 (TRDOS 386 v2.0.5)
   323                              <1> ; 18/04/2021 (TRDOS 386 v2.0.4)
   324                              <1> ; 17/01/2016 (TRDOS 386 = TRDOS v2.0)
   325                              <1> 
   326                              <1> ;--- CMOS_WRITE ----------------------------------------------------------------
   327                              <1> ;	WRITE BYTE TO CMOS SYSTEM CLOCK CONFIGURATION TABLE		       :
   328                              <1> ;									       :
   329                              <1> ; INPUT: (AL)=	CMOS TABLE ADDRESS TO BE WRITTEN TO			       :
   330                              <1> ;		BIT    7 = 0 FOR NMI ENABLED AND 1 FOR NMI DISABLED ON EXIT    :
   331                              <1> ;		BITS 6-0 = ADDRESS OF TABLE LOCATION TO WRITE		       :
   332                              <1> ;	 (AH)=	NEW VALUE TO BE PLACED IN THE ADDRESSED TABLE LOCATION	       :
   333                              <1> ;									       :
   334                              <1> ; OUTPUT:	VALUE IN (AH) PLACED IN LOCATION (AL) WITH NMI LEFT DISABLED   :
   335                              <1> ;		IF BIT 7 OF (AL) IS ON, DURING THE CMOS UPDATE BOTH NMI AND    :
   336                              <1> ;		NORMAL INTERRUPTS ARE DISABLED TO PROTECT CMOS DATA INTEGRITY. :
   337                              <1> ;		THE CMOS ADDRESS REGISTER IS POINTED TO A DEFAULT VALUE AND    :
   338                              <1> ;		THE INTERRUPT FLAG RESTORED TO THE ENTRY STATE ON RETURN.      :
   339                              <1> ;		ONLY THE CMOS LOCATION AND THE NMI STATE IS CHANGED.	       :
   340                              <1> ;-------------------------------------------------------------------------------
   341                              <1> 
   342                              <1> 	; 08/08/2022
   343                              <1> CMOS_WRITE:				; WRITE (AH) TO LOCATION (AL)
   344                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
   345                              <1> 	;pushf				; SAVE INTERRUPT ENABLE STATUS AND FLAGS
   346                              <1> 	;;push	ax			; SAVE WORK REGISTER VALUES
   347                              <1> 	; 18/04/2021
   348                              <1> 	;push	eax
   349 00006320 D0C0                <1> 	rol	al, 1			; MOVE NMI BIT TO LOW POSITION
   350 00006322 F9                  <1> 	stc				; FORCE NMI BIT ON IN CARRY FLAG
   351 00006323 D0D8                <1> 	rcr	al, 1			; HIGH BIT ON TO DISABLE NMI - OLD IN CY
   352 00006325 FA                  <1> 	cli				; DISABLE INTERRUPTS
   353 00006326 E670                <1> 	out	CMOS_PORT, al		; ADDRESS LOCATION AND DISABLE NMI
   354 00006328 88E0                <1> 	mov	al, ah			; GET THE DATA BYTE TO WRITE
   355 0000632A E671                <1> 	out	CMOS_DATA, al		; PLACE IN REQUESTED CMOS LOCATION
   356 0000632C B01E                <1> 	mov	al, CMOS_SHUT_DOWN*2	; GET ADDRESS OF DEFAULT LOCATION
   357                              <1> 	;mov	al, CMOS_REG_D*2 	; GET ADDRESS OF DEFAULT LOCATION
   358 0000632E D0D8                <1> 	rcr	al, 1			; PUT ORIGINAL NMI MASK BIT INTO ADDRESS
   359 00006330 E670                <1> 	out	CMOS_PORT, al		; SET DEFAULT TO READ ONLY REGISTER
   360                              <1> 	;nop				; I/O DELAY
   361                              <1> 	; 29/07/2022
   362 00006332 E6EB                <1> 	out	0EBh, al ; NEWIODELAY ; AWARD BIOS 1999, ATIME.ASM
   363 00006334 E471                <1> 	in	al, CMOS_DATA		; OPEN STANDBY LATCH
   364                              <1> 	;;pop	ax			; RESTORE WORK REGISTERS
   365                              <1> 	; 18/04/2021
   366                              <1> 	;pop	eax
   367                              <1> 	;popf
   368                              <1> 	; 29/07/2022
   369                              <1> 	;clc
   370                              <1> 	; 08/08/2022
   371 00006336 30C0                <1> 	xor	al, al
   372 00006338 C3                  <1> 	retn
   373                              <1> 
   374                              <1> ;-------------------------------------------------------------------------------
   375                              <1> 
   376                              <1> RTC_60:				; SET RTC ALARM
   377 00006339 B00B                <1> 	mov	al, CMOS_REG_B		; ADDRESS ALARM
   378 0000633B E80B010000          <1> 	call	CMOS_READ		; READ ALARM REGISTER
   379 00006340 A820                <1> 	test	al, 20h			; CHECK FOR ALARM ALREADY ENABLED
   380 00006342 F9                  <1> 	stc				; SET CARRY IN CASE OF ERROR
   381 00006343 7541                <1> 	jnz	short RTC_69		; ERROR EXIT IF ALARM SET
   382 00006345 E8CB000000          <1> 	call	UPD_IPR			; CHECK FOR UPDATE IN PROCESS
   383 0000634A 7305                <1> 	jnc	short RTC_65		; SKIP INITIALIZATION IF NO ERROR
   384 0000634C E8DF000000          <1> 	call	RTC_STA			; ELSE INITIALIZE CLOCK
   385                              <1> RTC_65:	
   386 00006351 88F4                <1> 	mov	ah, dh			; GET SECONDS BYTE
   387 00006353 B001                <1> 	mov	al, CMOS_SEC_ALARM	; ADDRESS THE SECONDS ALARM REGISTER
   388 00006355 E8C6FFFFFF          <1> 	call	CMOS_WRITE		; INSERT SECONDS
   389 0000635A 88CC                <1> 	mov	ah, cl			; GET MINUTES PARAMETER
   390 0000635C B003                <1> 	mov	al, CMOS_MIN_ALARM	; ADDRESS MINUTES ALARM REGISTER
   391 0000635E E8BDFFFFFF          <1> 	call	CMOS_WRITE		; INSERT MINUTES
   392 00006363 88EC                <1> 	mov	ah, ch			; GET HOURS PARAMETER
   393 00006365 B005                <1> 	mov	al, CMOS_HR_ALARM	; ADDRESS HOUR ALARM REGISTER
   394 00006367 E8B4FFFFFF          <1> 	call	CMOS_WRITE		; INSERT HOURS
   395 0000636C E4A1                <1> 	in	al, INTB01		; READ SECOND INTERRUPT MASK REGISTER
   396 0000636E 24FE                <1> 	and	al, 0FEh		; ENABLE ALARM TIMER BIT (CY= 0)
   397 00006370 E6A1                <1> 	out	INTB01, al		; WRITE UPDATED MASK
   398                              <1> 	;mov	al, CMOS_REG_B		; ADDRESS ALARM REGISTER
   399                              <1> 	;mov	ah, al
   400 00006372 66B80B0B            <1> 	mov	ax, CMOS_REG_B * 257
   401 00006376 E8D0000000          <1> 	call	CMOS_READ		; READ CURRENT ALARM REGISTER
   402 0000637B 247F                <1> 	and	al, 07Fh		; ENSURE SET BIT TURNED OFF
   403 0000637D 0C20                <1> 	or	al, 20h			; TURN ON ALARM ENABLE
   404 0000637F 86E0                <1> 	xchg	ah, al			; MOVE MASK TO OUTPUT REGISTER
   405 00006381 E89AFFFFFF          <1> 	call	CMOS_WRITE		; WRITE NEW ALARM MASK
   406                              <1> 	; 29/07/2022
   407                              <1> 	;clc				; SET CY= 0
   408                              <1> RTC_69:
   409 00006386 66B80000            <1> 	mov	ax, 0			; CLEAR AX REGISTER
   410 0000638A C3                  <1> 	retn				; RETURN WITH RESULTS IN CARRY FLAC
   411                              <1> 
   412                              <1> RTC_70:				; RESET ALARM
   413                              <1> 	;mov	al, CMOS_REG_B		; ADDRESS ALARM REGISTER
   414                              <1> 	;mov	ah, al
   415 0000638B 66B80B0B            <1> 	mov	ax, CMOS_REG_B * 257	; ADDRESS ALARM REGISTER (TO BOTH AH,AL)
   416 0000638F E8B7000000          <1> 	call	CMOS_READ		; READ ALARM REGISTER
   417 00006394 2457                <1> 	and	al, 57h			; TURN OFF ALARM ENABLE
   418 00006396 86E0                <1> 	xchg	ah, al			; SAVE DATA AND RECOVER ADDRESS
   419                              <1> 	;call	CMOS_WRITE		; RESTORE NEW VALUE
   420                              <1> 	;clc				; SET CY= 0
   421                              <1> 	;retn				; RETURN WITH NO CARRY
   422                              <1> 	; 29/07/2022
   423 00006398 EB86                <1> 	jmp	short CMOS_WRITE
   424                              <1> 
   425                              <1> ;-------------------------------------------------------------------------------
   426                              <1> 
   427                              <1> ; 17/01/2016 (TRDOS 386 = TRDOS v2.0)
   428                              <1> 
   429                              <1> ;--- HARDWARE INT 70 H -- ( IRQ LEVEL 8) ----------------------------------------
   430                              <1> ; ALARM INTERRUPT HANDLER (RTC)							:
   431                              <1> ;       THIS ROUTINE HANDLES THE PERIODIC AND ALARM INTERRUPTS FROM THE CMOS	:
   432                              <1> ;       TIMER. INPUT FREQUENCY IS 1.024 KHZ OR APPROXIMATELY 1024 INTERRUPTS	:
   433                              <1> ;       EVERY SECOND FOR THE PERIODIC INTERRUPT. FOR THE ALARM FUNCTION,	:
   434                              <1> ;       THE INTERRUPT WILL OCCUR AT THE DESIGNATED TIME.			:
   435                              <1> ;										:
   436                              <1> ;       INTERRUPTS ARE ENABLED WHEN THE EVENT OR ALARM FUNCTION IS ACTIVATED.	:
   437                              <1> ;       FOR THE EVENT INTERRUPT, THE HANDLER WILL DECREMENT THE WAIT COUNTER	:
   438                              <1> ;       AND WHEN IT EXPIRES WILL SET THE DESIGNATED LOCATION TO 80H. FOR	:
   439                              <1> ;       THE ALARM INTERRUPT. THE USER MUST PROVIDE A ROUTINE TO INTERCEPT	:
   440                              <1> ;       THE CORRECT ADDRESS FROM THE VECTOR TABLE INVOKED BY INTERRUPT 4AH	:
   441                              <1> ;       PRIOR TO SETTING THE REAL TIME CLOCK ALARM (INT 1AH, AH= 06H).		:
   442                              <1> ;--------------------------------------------------------------------------------
   443                              <1> 
   444                              <1> RTC_A_INT: ; 07/01/2017
   445                              <1> ;RTC_INT:				; ALARM INTERRUPT
   446 0000639A 1E                  <1> 	push	ds			; LEAVE INTERRUPTS DISABLED
   447 0000639B 50                  <1> 	push	eax			; SAVE REGISTERS
   448 0000639C 57                  <1> 	push	edi
   449                              <1> RTC_I_1:				; CHECK FOR SECOND INTERRUPT
   450 0000639D 66B88C8B            <1> 	mov	ax, 256*(CMOS_REG_B+NMI)+CMOS_REG_C+NMI ; ALARM AND STATUS
   451 000063A1 E670                <1> 	out	CMOS_PORT, al		; WRITE ALARM FLAG MASK ADDRESS
   452 000063A3 90                  <1> 	nop				; I/O DELAY
   453 000063A4 EB00                <1> 	jmp	short $+2
   454 000063A6 E471                <1> 	in	al, CMOS_DATA		; READ AND RESET INTERRUPT REQUEST FLAGS
   455 000063A8 A860                <1> 	test	al, 01100000b		; CHECK FOR EITHER INTERRUPT PENDING
   456 000063AA 745B                <1> 	jz	short	RTC_I_9		; EXIT IF NOT A VALID RTC INTERRUPT
   457                              <1> 
   458 000063AC 86E0                <1> 	xchg	ah, al			; SAVE FLAGS AND GET ENABLE ADDRESS
   459 000063AE E670                <1> 	out	CMOS_PORT, al		; WRITE ALARM ENABLE MASK ADDRESS
   460 000063B0 90                  <1> 	nop				; I/O DELAY
   461 000063B1 EB00                <1> 	jmp	short $+2	
   462 000063B3 E471                <1> 	in	al, CMOS_DATA		; READ CURRENT ALARM ENABLE MASK
   463 000063B5 20E0                <1> 	and	al, ah			; ALLOW ONLY SOURCES THAT ARE ENABLED
   464 000063B7 A840                <1> 	test	al, 01000000b		; CHECK FOR PERIODIC INTERRUPT
   465 000063B9 7439                <1> 	jz	short RTC_I_5		; SKIP IF NOT A PERIODIC INTERRUPT
   466                              <1> 
   467                              <1> ;-----	DECREMENT WAIT COUNT BY INTERRUPT INTERVAL
   468                              <1> 
   469 000063BB 66BF1000            <1> 	mov	di, KDATA		; kernel data segment
   470 000063BF 8EDF                <1> 	mov	ds, di
   471                              <1> 	
   472 000063C1 812D[C0770100]D003- <1> 	sub	dword [RTC_LH], 976	; DECREMENT COUNT BY 1/1024
   472 000063C9 0000                <1>
   473 000063CB 7327                <1> 	jnc	short RTC_I_5		; SKIP TILL 32 BIT WORD LESS THAN ZERO
   474                              <1> 
   475                              <1> ;-----	TURN OFF PERIODIC INTERRUPT ENABLE
   476                              <1> 
   477                              <1> 	;push	ax			; SAVE INTERRUPT FLAG MASK
   478                              <1> 	; 18/04/2021
   479 000063CD 50                  <1> 	push	eax
   480 000063CE 66B88B8B            <1> 	mov	ax, 257*(CMOS_REG_B+NMI) ; INTERRUPT ENABLE REGISTER
   481 000063D2 E670                <1> 	out	CMOS_PORT, al		; WRITE ADDRESS TO CMOS CLOCK
   482 000063D4 90                  <1> 	nop				; I/O DELAY
   483 000063D5 EB00                <1> 	jmp	short $+2
   484 000063D7 E471                <1> 	in	al, CMOS_DATA		; READ CURRENT ENABLES
   485 000063D9 24BF                <1> 	and	al, 0BFh		; TURN OFF PIE
   486 000063DB 86C4                <1> 	xchg	al, ah			; GET CMOS ADDRESS AND SAVE VALUE
   487 000063DD E670                <1> 	out	CMOS_PORT, al		; ADDRESS REGISTER B
   488 000063DF 86C4                <1> 	xchg	al, ah			; GET NEW INTERRUPT ENABLE MASK
   489 000063E1 E671                <1> 	out	CMOS_DATA, al		; SET MASK IN INTERRUPT ENABLE REGISTER
   490 000063E3 C605[C4770100]00    <1> 	mov	byte [RTC_WAIT_FLAG], 0	; SET FUNCTION ACTIVE FLAG OFF
   491 000063EA 8B3D[C5770100]      <1> 	mov	edi, [USER_FLAG]	; SET UP (DS:DI) TO POINT TO USER FLAG
   492 000063F0 C60780              <1> 	mov	byte [edi], 80h		; TURN ON USERS FLAG
   493                              <1> 	;pop	ax			; GET INTERRUPT SOURCE BACK
   494                              <1> 	; 18/04/2021
   495 000063F3 58                  <1> 	pop	eax
   496                              <1> RTC_I_5:
   497 000063F4 A820                <1> 	test	al, 00100000b		; TEST FOR ALARM INTERRUPT
   498 000063F6 740D                <1> 	jz	short RTC_I_7		; SKIP USER INTERRUPT CALL IF NOT ALARM
   499                              <1> 
   500 000063F8 B00D                <1> 	mov	al, CMOS_REG_D		; POINT TO DEFAULT READ ONLY REGISTER
   501 000063FA E670                <1> 	out	CMOS_PORT, al		; ENABLE NMI AND CMOS ADDRESS TO DEFAULT
   502 000063FC FB                  <1> 	sti				; INTERRUPTS BACK ON NOW
   503 000063FD 52                  <1> 	push	edx
   504 000063FE E893BB0000          <1> 	call	INT4Ah			; TRANSFER TO USER ROUTINE
   505 00006403 5A                  <1> 	pop	edx
   506 00006404 FA                  <1> 	cli				; BLOCK INTERRUPT FOR RETRY
   507                              <1> RTC_I_7:				; RESTART ROUTINE TO HANDLE DELAYED
   508 00006405 EB96                <1> 	jmp	short RTC_I_1		;  ENTRY AND SECOND EVENT BEFORE DONE
   509                              <1> 
   510                              <1> RTC_I_9:				; EXIT - NO PENDING INTERRUPTS
   511 00006407 B00D                <1> 	mov	al, CMOS_REG_D		; POINT TO DEFAULT READ ONLY REGISTER
   512 00006409 E670                <1> 	out	CMOS_PORT, al		; ENABLE NMI AND CMOS ADDRESS TO DEFAULT
   513 0000640B B020                <1> 	mov	al, EOI			; END OF INTERRUPT MASK TO 8259 - 2
   514 0000640D E6A0                <1> 	out	INTB00, al		; TO 8259 - 2
   515 0000640F E620                <1> 	out	INTA00,	al		; TO 8259 - 1
   516 00006411 5F                  <1> 	pop	edi			; RESTORE REGISTERS
   517 00006412 58                  <1> 	pop	eax
   518 00006413 1F                  <1> 	pop	ds
   519 00006414 CF                  <1> 	iretd				; END OF INTERRUPT
   520                              <1> 
   521                              <1> ;-------------------------------------------------------------------------------
   522                              <1> 
   523                              <1> 	; 29/05/2016 - TRDOS 386 (TRDOS v2.0)
   524                              <1> 	; 22/08/2014 (Retro UNIX 386 v1)
   525                              <1> 	; IBM PC/AT BIOS source code ----- 10/06/85 (bios2.asm)
   526                              <1> UPD_IPR:				; WAIT TILL UPDATE NOT IN PROGRESS
   527 00006415 51                  <1> 	push	ecx
   528                              <1> 
   529                              <1> 	; 29/05/2016
   530 00006416 B968110000          <1> 	mov	ecx, ((1984+244)*4)/2	; AWARD BIOS 1999, ATIME.ASM		
   531                              <1> 					; 'WAITCPU_CK_UD_STAT'
   532                              <1> 					; (244Us + 1984Us)
   533                              <1> 					; (assume each read takes
   534                              <1> 					;  2 microseconds).
   535                              <1> 	;mov	ecx, 65535		
   536                              <1> 		;mov cx, 800		; SET TIMEOUT LOOP COUNT (= 800)	
   537                              <1> UPD_10:
   538 0000641B B00A                <1> 	mov	al, CMOS_REG_A		; ADDRESS STATUS REGISTER A
   539 0000641D FA                  <1> 	cli				; NO TIMER INTERRUPTS DURING UPDATES
   540 0000641E E828000000          <1> 	call	CMOS_READ		; READ UPDATE IN PROCESS FLAG
   541 00006423 A880                <1> 	test	al, 80h			; IF UIP BIT IS ON ( CANNOT READ TIME )
   542 00006425 7406                <1> 	jz	short UPD_90		; EXIT WITH CY= 0 IF CAN READ CLOCK NOW
   543 00006427 FB                  <1> 	sti				; ALLOW INTERRUPTS WHILE WAITING
   544 00006428 E2F1                <1> 	loop	UPD_10			; LOOP TILL READY OR TIMEOUT
   545 0000642A 31C0                <1> 	xor	eax, eax ; xor ax, ax	; CLEAR RESULTS IF ERROR
   546 0000642C F9                  <1> 	stc				; SET CARRY FOR ERROR
   547                              <1> UPD_90:
   548 0000642D 59                  <1> 	pop	ecx			; RESTORE CALLERS REGISTER
   549 0000642E FA                  <1> 	cli				; INTERRUPTS OFF DURING SET
   550 0000642F C3                  <1> 	retn				; RETURN WITH CY FLAG SET
   551                              <1> 
   552                              <1> 	; 18/04/2021
   553                              <1> RTC_STA:			; INITIALIZE REAL TIME CLOCK
   554                              <1> 	;mov	al, CMOS_REG_A		; ADDRESS REGISTER A AND LOAD DATA MASK		
   555                              <1> 	;mov	ah, 26h
   556 00006430 66B80A26            <1> 	mov	ax, (26h*100h)+CMOS_REG_A
   557 00006434 E8E7FEFFFF          <1> 	call	CMOS_WRITE		; INITIALIZE STATUS REGISTER A
   558                              <1> 	;mov	al, CMOS_REG_B		; SET "SET BIT" FOR CLOCK INITIALIZATION	
   559                              <1> 	;mov	ah, 82h
   560 00006439 66B80B82            <1> 	mov	ax, (82h*100h)+CMOS_REG_B
   561 0000643D E8DEFEFFFF          <1> 	call	CMOS_WRITE		; AND 24 HOUR MODE TO REGISTER B
   562 00006442 B00C                <1> 	mov	al, CMOS_REG_C		; ADDRESS REGISTER C
   563 00006444 E802000000          <1> 	call	CMOS_READ		; READ REGISTER C TO INITIALIZE
   564 00006449 B00D                <1> 	mov	al, CMOS_REG_D		; ADDRESS REGISTER D
   565                              <1> 	; 18/04/2021
   566                              <1> 	;call	CMOS_READ		; READ REGISTER D TO INITIALIZE
   567                              <1> 	;retn
   568                              <1> 	;jmp	short CMOS_READ ; 18/04/2021
   569                              <1> 
   570                              <1> ;-------------------------------------------------------------------------------
   571                              <1> 
   572                              <1> 	; 29/07/2022 - TRDOS 386 v2.0.5
   573                              <1> 	; 18/04/2021 - TRDOS 386 v2.0.4
   574                              <1> 	; 29/05/2016 - TRDOS 386 (TRDOS v2.0) 
   575                              <1> 	; 22/08/2014 (Retro UNIX 386 v1)
   576                              <1> 	; IBM PC/AT BIOS source code ----- 10/06/85 (test4.asm)
   577                              <1> 
   578                              <1> ;--- CMOS_READ -----------------------------------------------------------------
   579                              <1> ;		READ BYTE FROM CMOS_SYSTEM CLOCK CONFIGURATION TABLE	       :
   580                              <1> ;									       :
   581                              <1> ; INPUT: (AL)=	CMOS_TABLE ADDRESS TO BE READ				       :
   582                              <1> ;		BIT    7 = 0 FOR NMI ENABLED AND 1 FOR NMI DISABLED ON EXIT    :
   583                              <1> ;		BITS 6-0 = ADDRESS OF TABLE LOCATION TO READ		       :
   584                              <1> ;									       :
   585                              <1> ; OUTPUT: (AL)	VALUE AT LOCATION (AL) MOVED INTO (AL). IF BIT 7 OF (AL) WAS   :
   586                              <1> ;		ON THEN NMI LEFT DISABLED, DURING THE CMOS READ BOTH NMI AND   :
   587                              <1> ;		NORMAL INTERRUPTS ARE DISABLED TO PROTECT CMOS DATA INTEGRITY. :
   588                              <1> ;		THE CMOS ADDRESS REGISTER IS POINTED TO A DEFAULT VALUE AND    :
   589                              <1> ;		THE INTERRUPT FLAG RESTORED TO THE ENTRY STATE ON RETURN.      :
   590                              <1> ;		ONLY THE (AL) REGISTER AND THE NMI STATE IS CHANGED.	       :
   591                              <1> ;-------------------------------------------------------------------------------
   592                              <1> 
   593                              <1> CMOS_READ:
   594                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
   595                              <1> 	;pushf				; SAVE INTERRUPT ENABLE STATUS AND FLAGS
   596 0000644B D0C0                <1> 	rol	al, 1			; MOVE NMI BIT TO LOW POSITION
   597 0000644D F9                  <1> 	stc				; FORCE NMI BIT ON IN CARRY FLAG
   598 0000644E D0D8                <1> 	rcr	al, 1			; HIGH BIT ON TO DISABLE NMI - OLD IN CY
   599 00006450 FA                  <1> 	cli				; DISABLE INTERRUPTS
   600 00006451 E670                <1> 	out	CMOS_PORT, al		; ADDRESS LOCATION AND DISABLE NMI
   601                              <1> 	; 29/05/2016
   602                              <1> 	;nop				; I/O DELAY
   603 00006453 E6EB                <1> 	out	0EBh, al ; NEWIODELAY ; AWARD BIOS 1999, ATIME.ASM
   604                              <1> 	;
   605 00006455 E471                <1> 	in	al, CMOS_DATA		; READ THE REQUESTED CMOS LOCATION
   606                              <1> 	;push	ax	; SAVE (AH) REGISTER VALUE AND CMOS BYTE
   607                              <1> 	; 18/04/2021
   608 00006457 50                  <1> 	push	eax
   609                              <1> 	; 15/03/2015 ; IBM PC/XT Model 286 BIOS source code 
   610                              <1> 		     ; ----- 10/06/85 (test4.asm)
   611 00006458 B01E                <1> 	mov	al, CMOS_SHUT_DOWN*2 	; GET ADDRESS OF DEFAULT LOCATION
   612                              <1> 	;mov	al, CMOS_REG_D*2 	; GET ADDRESS OF DEFAULT LOCATION
   613 0000645A D0D8                <1> 	rcr	al, 1			; PUT ORIGINAL NMI MASK BIT INTO ADDRESS
   614 0000645C E670                <1> 	out	CMOS_PORT, al		; SET DEFAULT TO READ ONLY REGISTER
   615                              <1> 	;pop	ax			; RESTORE (AH) AND (AL), CMOS BYTE
   616                              <1> 	; 18/04/2021
   617 0000645E 58                  <1> 	pop	eax
   618                              <1> 	; 29/07/2022
   619                              <1> 	;popf
   620 0000645F F8                  <1> 	clc	; 29/07/2022	
   621 00006460 C3                  <1> 	retn				; RETURN WITH FLAGS RESTORED
   622                              <1> 
   623                              <1> ;-------------------------------------------------------------------------------
   624                              <1> 
   625                              <1> ; /// End Of TIMER FUNCTIONS ///
  3110                                  
  3111 00006461 90<rep Fh>              Align 16
  3112                                  
  3113                                  gdt:	; Global Descriptor Table
  3114                                  	; 02/12/2020
  3115                                  	; (30/07/2015, conforming cs)
  3116                                  	; (26/03/2015)
  3117                                  	; (24/03/2015, tss)
  3118                                  	; (19/03/2015)
  3119                                  	; (29/12/2013)
  3120                                  	;
  3121 00006470 0000000000000000        	dw 0, 0, 0, 0		; NULL descriptor
  3122                                  gdt_kcode:
  3123                                  	; 18/08/2014
  3124                                  			; 8h kernel code segment, base = 00000000h		
  3125                                  	;dw 0FFFFh, 0, 9E00h, 00CFh	; KCODE  ; 30/12/2016	 
  3126 00006478 FFFF0000009ACF00        	dw 0FFFFh, 0, 9A00h, 00CFh	; KCODE
  3127                                  gdt_kdata:
  3128                                  			; 10h kernel data segment, base = 00000000h	
  3129 00006480 FFFF00000092CF00        	dw 0FFFFh, 0, 9200h, 00CFh	; KDATA
  3130                                  gdt_ucode:
  3131                                  			; 1Bh user code segment, base address = 400000h ; CORE
  3132                                  	;dw 0FBFFh, 0, 0FE40h, 00CFh	; UCODE  ; 30/12/2016	
  3133 00006488 FFFB000040FACF00        	dw 0FBFFh, 0, 0FA40h, 00CFh	; UCODE
  3134                                  gdt_udata: 
  3135                                  			; 23h user data segment, base address = 400000h ; CORE
  3136 00006490 FFFB000040F2CF00        	dw 0FBFFh, 0, 0F240h, 00CFh	; UDATA
  3137                                  gdt_tss:
  3138                                  			; Task State Segment
  3139 00006498 6700                    	dw 0067h ; Limit = 103 ; (104-1, tss size = 104 byte, 
  3140                                  			       ;  no IO permission in ring 3)
  3141                                  gdt_tss0:
  3142 0000649A 0000                    	dw 0  ; TSS base address, bits 0-15 
  3143                                  gdt_tss1:
  3144 0000649C 00                      	db 0  ; TSS base address, bits 16-23 
  3145                                  	      		; 49h	
  3146 0000649D E9                      	db 11101001b ; 0E9h => P=1/DPL=11/0/1/0/B/1 --> B = Task is busy (1)
  3147 0000649E 00                      	db 0 ; G/0/0/AVL/LIMIT=0000 ; (Limit bits 16-19 = 0000) (G=0, 1 byte)
  3148                                  gdt_tss2:
  3149 0000649F 00                      	db 0  ; TSS base address, bits 24-31 
  3150                                  
  3151                                  	; 30/11/2020
  3152                                  	; 29/11/2020 - TRDOS v2.0.3
  3153                                  	; VESA VBE3 VIDE BIOS 32 BIT PMI SEGMENTS (16 bit segments)
  3154                                  			; 30h ; VBE3CS
  3155                                  _vbe3_CS:  ; vesa vbe3 bios uses this as code seg (same addr with _vbe3_DS)
  3156                                  	; limit = 65536, base addr = 0, P/DPL/1/Type/C/R/A = 9Ah, 16 bit
  3157 000064A0 FFFF0000009A0000        	dw 0FFFFh, 0, 9A00h, 0 ; Note: base addr will be initialized
  3158                                  			; 38h ; VBE3BDS
  3159                                  _vbe3_BDS: ; vesa vbe3 bios uses this as equivalent of rombios data segment
  3160                                  	; limit = 1536, base addr = 0, P/DPL/1/Type/E/W/A = 92h, 16 bit
  3161 000064A8 FF05000000920000        	dw 05FFh, 0, 9200h, 0 ; Note: base addr will be initialized	
  3162                                  			; 40h ; VBE3A000 
  3163                                  _A0000Sel: ; VGA default video memory address
  3164                                  	; limit = 65536, base addr = 0A0000h, 16 bit
  3165 000064B0 FFFF00000A920000        	dw 0FFFFh, 0, 920Ah, 0
  3166                                  			; 48h ; VBE3B000 
  3167                                  _B0000Sel: ; MDA (monochrome) video memory address
  3168                                  	; limit = 65536, base addr = 0B0000h, 16 bit
  3169 000064B8 FFFF00000B920000        	dw 0FFFFh, 0, 920Bh, 0
  3170                                  			; 50h ; VBE3B800 
  3171                                  _B8000Sel: ; CGA video memory address
  3172                                  	; limit = 32768, base addr = 0B8000h, 16 bit
  3173 000064C0 FF7F00800B920000        	dw 07FFFh, 8000h, 920Bh, 0
  3174                                  			; 58h ; VBE3DS 
  3175                                  _vbe3_DS: ; vesa vbe3 bios uses this as data seg (CodeSegSel in PMInfoBlock)
  3176                                  	; limit = 65536, base addr = 0, P/DPL/1/Type/E/W/A = 92h, 16 bit
  3177 000064C8 FFFF000000920000        	dw 0FFFFh, 0, 9200h, 0 ; Note: base addr will be initialized
  3178                                  			; 60h ; VBE3SS   
  3179                                  _vbe3_SS: ; kernel's stack segment but 16 bit version (same stack addr)
  3180                                  	; limit = 1024, base addr = 0, P/DPL/1/Type/E/W/A = 92h, 16 bit
  3181 000064D0 FF03000000920000        	dw 03FFh, 0, 9200h, 0 ; Note: base addr will be initialized
  3182                                  			; 68h ; VBE3ES 	
  3183                                  _vbe3_ES: ; extra 16 bit segment points to buffers in kernel's mem space
  3184                                  	; limit = 2048, base addr = 0, P/DPL/1/Type/E/W/A = 92h, 16 bit
  3185 000064D8 FF07000000920000        	dw 07FFh, 0, 9200h,0 ; Note: base addr will be initialized
  3186                                  			; 70h ; KODE16	
  3187                                  _16bit_CS: ; 16 bit code segment points to kernel's far return addr
  3188                                  	; limit = 16M, base addr = 0, P/DPL/1/Type/E/W/A = 92h, 16 bit
  3189 000064E0 FFFF0000009AFF00        	dw 0FFFFh, 0, 9A00h, 00FFh ; Note: base addr will be initialized
  3190                                  
  3191                                  gdt_end:
  3192                                  	;; 9Eh = 1001 1110b (GDT byte 5) P=1/DPL=00/1/TYPE=1110, 
  3193                                  					;; Type= 1 (code)/C=1/R=1/A=0
  3194                                  		; P= Present, DPL=0=ring 0,  1= user (0= system)
  3195                                  		; 1= Code C= Conforming, R= Readable, A= Accessed
  3196                                  
  3197                                  	;; 9Ah = 1001 1010b (GDT byte 5) P=1/DPL=00/1/TYPE=1010, 
  3198                                  					;; Type= 1 (code)/C=0/R=1/A=0
  3199                                  		; P= Present, DPL=0=ring 0,  1= user (0= system)
  3200                                  		; 1= Code C= non-Conforming, R= Readable, A= Accessed
  3201                                  
  3202                                  	;; 92h = 1001 0010b (GDT byte 5) P=1/DPL=00/1/TYPE=1010, 
  3203                                  					;; Type= 0 (data)/E=0/W=1/A=0
  3204                                  		; P= Present, DPL=0=ring 0,  1= user (0= system)
  3205                                  		; 0= Data E= Expansion direction (1= down, 0= up)
  3206                                  		; W= Writeable, A= Accessed
  3207                                  
  3208                                  	;; FEh = 1111 1110b (GDT byte 5) P=1/DPL=11/1/TYPE=1110, 
  3209                                  					;; Type= 1 (code)/C=1/R=1/A=0
  3210                                  		; P= Present, DPL=3=ring 3,  1= user (0= system)
  3211                                  		; 1= Code C= Conforming, R= Readable, A= Accessed
  3212                                  	
  3213                                  	;; FAh = 1111 1010b (GDT byte 5) P=1/DPL=11/1/TYPE=1010, 
  3214                                  					;; Type= 1 (code)/C=0/R=1/A=0
  3215                                  		; P= Present, DPL=3=ring 3,  1= user (0= system)
  3216                                  		; 1= Code C= non-Conforming, R= Readable, A= Accessed
  3217                                  
  3218                                  	;; F2h = 1111 0010b (GDT byte 5) P=1/DPL=11/1/TYPE=0010, 
  3219                                  					;; Type= 0 (data)/E=0/W=1/A=0
  3220                                  		; P= Present, DPL=3=ring 3,  1= user (0= system)
  3221                                  		; 0= Data E= Expansion direction (1= down, 0= up)
  3222                                  	
  3223                                  	;; CFh = 1100 1111b (GDT byte 6) G=1/B=1/0/AVL=0, Limit=1111b (3)
  3224                                  
  3225                                  		;; Limit = FFFFFh (=> FFFFFh+1= 100000h) // bits 0-15, 48-51 //
  3226                                  		;	 = 100000h * 1000h (G=1) = 4GB
  3227                                  		;; Limit = FFBFFh (=> FFBFFh+1= FFC00h) // bits 0-15, 48-51 //
  3228                                  		;	 = FFC00h * 1000h (G=1) = 4GB - 4MB
  3229                                  		; G= Granularity (1= 4KB), B= Big (32 bit), 
  3230                                  		; AVL= Available to programmers	
  3231                                  
  3232                                  gdtd:
  3233 000064E8 7700                            dw gdt_end - gdt - 1    ; Limit (size)
  3234 000064EA [70640000]                      dd gdt			; Address of the GDT
  3235                                  
  3236                                  	; 20/08/2014
  3237                                  idtd:
  3238 000064EE 7F02                            dw idt_end - idt - 1    ; Limit (size)
  3239 000064F0 [60740100]                      dd idt			; Address of the IDT
  3240                                  
  3241                                  ; 20/02/2017
  3242                                  ;;; 11/03/2015
  3243                                  %include 'diskdata.s'	; DISK (BIOS) DATA (initialized)
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel) - v2.0.5 - diskdata.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 06/08/2022 (Previous: 24/01/2016)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 24/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Turkish Rational DOS
    11                              <1> ; Operating System Project v2.0 by ERDOGAN TAN (Beginning: 04/01/2016)
    12                              <1> ;
    13                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    14                              <1> ; diskdata.inc (11/03/2015)
    15                              <1> ;
    16                              <1> ; Derived from 'IBM PC-XT-286' BIOS source code (1986) 
    17                              <1> ; ****************************************************************************
    18                              <1> 
    19                              <1> ; Retro UNIX 386 v1 Kernel - DISKDATA.INC
    20                              <1> ; Last Modification: 11/03/2015
    21                              <1> ;	(Initialized Disk Parameters Data section for 'DISKIO.INC') 
    22                              <1> ;
    23                              <1> 
    24                              <1> ;----------------------------------------
    25                              <1> ;	80286 INTERRUPT LOCATIONS	:
    26                              <1> ;	REFERENCED BY POST & BIOS	:
    27                              <1> ;----------------------------------------
    28                              <1> 
    29 000064F4 [57650000]          <1> DISK_POINTER:	dd	MD_TBL6		; Pointer to Diskette Parameter Table
    30                              <1> 
    31                              <1> ; IBM PC-XT Model 286 source code ORGS.ASM (06/10/85) - 14/12/2014
    32                              <1> ;----------------------------------------------------------------
    33                              <1> ; DISK_BASE							:
    34                              <1> ;	THIS IS THE SET OF PARAMETERS REQUIRED FOR		:
    35                              <1> ;	DISKETTE OPERATION. THEY ARE POINTED AT BY THE		:
    36                              <1> ;	DATA VARIABLE @DISK_POINTER. TO MODIFY THE PARAMETERS,	:
    37                              <1> ;	BUILD ANOTHER PARAMETER BLOCK AND POINT AT IT		:
    38                              <1> ;----------------------------------------------------------------
    39                              <1> 
    40                              <1> ;DISK_BASE:	
    41                              <1> ;	DB	11011111B	; SRT=D, HD UNLOAD=0F - 1ST SPECIFY BYTE
    42                              <1> ;	DB	2		; HD LOAD=1, MODE=DMA - 2ND SPECIFY BYTE
    43                              <1> ;	DB	MOTOR_WAIT	; WAIT TIME AFTER OPERATION TILL MOTOR OFF
    44                              <1> ;	DB	2		; 512 BYTES/SECTOR
    45                              <1> ;	;DB	15		; EOT (LAST SECTOR ON TRACK)
    46                              <1> ;	db	18		; (EOT for 1.44MB diskette)
    47                              <1> ;	DB	01BH		; GAP LENGTH
    48                              <1> ;	DB	0FFH		; DTL
    49                              <1> ;	;DB	054H		; GAP LENGTH FOR FORMAT
    50                              <1> ;	db	06ch		; (for 1.44MB dsikette)
    51                              <1> ;	DB	0F6H		; FILL BYTE FOR FORMAT
    52                              <1> ;	DB	15		; HEAD SETTLE TIME (MILLISECONDS)
    53                              <1> ;	DB	8		; MOTOR START TIME (1/8 SECONDS)
    54                              <1> 
    55                              <1> ;----------------------------------------
    56                              <1> ;	ROM BIOS DATA AREAS		:
    57                              <1> ;----------------------------------------
    58                              <1> 
    59                              <1> ;DATA		SEGMENT AT 40H		; ADDRESS= 0040:0000
    60                              <1> 
    61                              <1> ;@EQUIP_FLAG	DW	?		; INSTALLED HARDWARE FLAGS
    62                              <1> 
    63                              <1> ;----------------------------------------
    64                              <1> ;	DISKETTE DATA AREAS		:
    65                              <1> ;----------------------------------------
    66                              <1> 
    67                              <1> ;@SEEK_STATUS	DB	?		; DRIVE RECALIBRATION STATUS
    68                              <1> ;					; BIT 3-0 = DRIVE 3-0 RECALIBRATION
    69                              <1> ;					; BEFORE NEXT SEEK IF BIT IS = 0
    70                              <1> ;@MOTOR_STATUS	DB	?		; MOTOR STATUS
    71                              <1> ;					; BIT 3-0 = DRIVE 3-0 CURRENTLY RUNNING
    72                              <1> ;					; BIT 7 = CURRENT OPERATION IS A WRITE
    73                              <1> ;@MOTOR_COUNT	DB	?		; TIME OUT COUNTER FOR MOTOR(S) TURN OFF
    74                              <1> ;@DSKETTE_STATUS DB	?		; RETURN CODE STATUS BYTE
    75                              <1> ;					; CMD_BLOCK  IN STACK FOR DISK OPERATION
    76                              <1> ;@NEC_STATUS	DB	7 DUP(?)	; STATUS BYTES FROM DISKETTE OPERATION
    77                              <1> 
    78                              <1> ;----------------------------------------
    79                              <1> ;	POST AND BIOS WORK DATA AREA	:
    80                              <1> ;----------------------------------------
    81                              <1> 
    82                              <1> ;@INTR_FLAG	DB	?		; FLAG INDICATING AN INTERRUPT HAPPENED
    83                              <1> 
    84                              <1> ;----------------------------------------
    85                              <1> ;	TIMER DATA AREA 		:
    86                              <1> ;----------------------------------------
    87                              <1> 
    88                              <1> ; 17/12/2014  (IRQ 0 - INT 08H)
    89                              <1> ;TIMER_LOW	equ	46Ch		; Timer ticks (counter)  @ 40h:006Ch
    90                              <1> ;TIMER_HIGH	equ	46Eh		; (18.2 timer ticks per second)
    91                              <1> ;TIMER_OFL	equ	470h		; Timer - 24 hours flag  @ 40h:0070h
    92                              <1> 
    93                              <1> ;----------------------------------------
    94                              <1> ;	ADDITIONAL MEDIA DATA		:
    95                              <1> ;----------------------------------------
    96                              <1> 
    97                              <1> ;@LASTRATE	DB	?		; LAST DISKETTE DATA RATE SELECTED
    98                              <1> ;@DSK_STATE	DB	?		; DRIVE 0 MEDIA STATE
    99                              <1> ;		DB	?		; DRIVE 1 MEDIA STATE
   100                              <1> ;		DB	?		; DRIVE 0 OPERATION START STATE
   101                              <1> ;		DB	?		; DRIVE 1 OPERATION START STATE
   102                              <1> ;@DSK_TRK	DB	?		; DRIVE 0 PRESENT CYLINDER
   103                              <1> ;		DB	?		; DRIVE 1 PRESENT CYLINDER
   104                              <1> 
   105                              <1> ;DATA		ENDS			; END OF BIOS DATA SEGMENT
   106                              <1> 
   107                              <1> ;--------------------------------------------------------
   108                              <1> ;	DRIVE TYPE TABLE				:
   109                              <1> ;--------------------------------------------------------
   110                              <1> 		; 16/02/2015 (unix386.s, 32 bit modifications)
   111                              <1> DR_TYPE:
   112 000064F8 01                  <1> 		DB	01		; DRIVE TYPE, MEDIA TABLE
   113                              <1>                 ;DW	MD_TBL1
   114 000064F9 [16650000]          <1> 		dd	MD_TBL1
   115 000064FD 82                  <1> 		DB	02+BIT7ON
   116                              <1> 		;DW	MD_TBL2
   117 000064FE [23650000]          <1>                 dd      MD_TBL2
   118 00006502 02                  <1> DR_DEFAULT:	DB	02
   119                              <1>                 ;DW	MD_TBL3
   120 00006503 [30650000]          <1> 		dd      MD_TBL3
   121 00006507 03                  <1> 		DB	03
   122                              <1>                 ;DW	MD_TBL4
   123 00006508 [3D650000]          <1> 		dd      MD_TBL4
   124 0000650C 84                  <1> 		DB	04+BIT7ON
   125                              <1>                 ;DW	MD_TBL5
   126 0000650D [4A650000]          <1> 		dd      MD_TBL5
   127 00006511 04                  <1> 		DB	04
   128                              <1>                 ;DW	MD_TBL6
   129 00006512 [57650000]          <1> 		dd      MD_TBL6
   130                              <1> DR_TYPE_E       equ $                   ; END OF TABLE
   131                              <1> ;DR_CNT		EQU	(DR_TYPE_E-DR_TYPE)/3
   132                              <1> DR_CNT		equ	(DR_TYPE_E-DR_TYPE)/5
   133                              <1> ;--------------------------------------------------------
   134                              <1> ;	MEDIA/DRIVE PARAMETER TABLES			:
   135                              <1> ;--------------------------------------------------------
   136                              <1> ;--------------------------------------------------------
   137                              <1> ;	360 KB MEDIA IN 360 KB DRIVE			:
   138                              <1> ;--------------------------------------------------------
   139                              <1> MD_TBL1:        
   140 00006516 DF                  <1> 	DB	11011111B	; SRT=D, HD UNLOAD=0F - 1ST SPECIFY BYTE
   141 00006517 02                  <1> 	DB	2		; HD LOAD=1, MODE=DMA - 2ND SPECIFY BYTE
   142 00006518 25                  <1> 	DB	MOTOR_WAIT	; WAIT TIME AFTER OPERATION TILL MOTOR OFF
   143 00006519 02                  <1> 	DB	2		; 512 BYTES/SECTOR
   144 0000651A 09                  <1> 	DB	09		; EOT (LAST SECTOR ON TRACK)
   145 0000651B 2A                  <1> 	DB	02AH		; GAP LENGTH
   146 0000651C FF                  <1> 	DB	0FFH		; DTL
   147 0000651D 50                  <1> 	DB	050H		; GAP LENGTH FOR FORMAT
   148 0000651E F6                  <1> 	DB	0F6H		; FILL BYTE FOR FORMAT
   149 0000651F 0F                  <1> 	DB	15		; HEAD SETTLE TIME (MILLISECONDS)
   150 00006520 08                  <1> 	DB	8		; MOTOR START TIME (1/8 SECONDS)
   151 00006521 27                  <1> 	DB	39		; MAX. TRACK NUMBER
   152 00006522 80                  <1> 	DB	RATE_250	; DATA TRANSFER RATE
   153                              <1> ;--------------------------------------------------------
   154                              <1> ;	360 KB MEDIA IN 1.2 MB DRIVE			:
   155                              <1> ;--------------------------------------------------------
   156                              <1> MD_TBL2:        
   157 00006523 DF                  <1> 	DB	11011111B	; SRT=D, HD UNLOAD=0F - 1ST SPECIFY BYTE
   158 00006524 02                  <1> 	DB	2		; HD LOAD=1, MODE=DMA - 2ND SPECIFY BYTE
   159 00006525 25                  <1> 	DB	MOTOR_WAIT	; WAIT TIME AFTER OPERATION TILL MOTOR OFF
   160 00006526 02                  <1> 	DB	2		; 512 BYTES/SECTOR
   161 00006527 09                  <1> 	DB	09		; EOT (LAST SECTOR ON TRACK)
   162 00006528 2A                  <1> 	DB	02AH		; GAP LENGTH
   163 00006529 FF                  <1> 	DB	0FFH		; DTL
   164 0000652A 50                  <1> 	DB	050H		; GAP LENGTH FOR FORMAT
   165 0000652B F6                  <1> 	DB	0F6H		; FILL BYTE FOR FORMAT
   166 0000652C 0F                  <1> 	DB	15		; HEAD SETTLE TIME (MILLISECONDS)
   167 0000652D 08                  <1> 	DB	8		; MOTOR START TIME (1/8 SECONDS)
   168 0000652E 27                  <1> 	DB	39		; MAX. TRACK NUMBER
   169 0000652F 40                  <1> 	DB	RATE_300	; DATA TRANSFER RATE
   170                              <1> ;--------------------------------------------------------
   171                              <1> ;	1.2 MB MEDIA IN 1.2 MB DRIVE			:
   172                              <1> ;--------------------------------------------------------
   173                              <1> MD_TBL3:
   174 00006530 DF                  <1> 	DB	11011111B	; SRT=D, HD UNLOAD=0F - 1ST SPECIFY BYTE
   175 00006531 02                  <1> 	DB	2		; HD LOAD=1, MODE=DMA - 2ND SPECIFY BYTE
   176 00006532 25                  <1> 	DB	MOTOR_WAIT	; WAIT TIME AFTER OPERATION TILL MOTOR OFF
   177 00006533 02                  <1> 	DB	2		; 512 BYTES/SECTOR
   178 00006534 0F                  <1> 	DB	15		; EOT (LAST SECTOR ON TRACK)
   179 00006535 1B                  <1> 	DB	01BH		; GAP LENGTH
   180 00006536 FF                  <1> 	DB	0FFH		; DTL
   181 00006537 54                  <1> 	DB	054H		; GAP LENGTH FOR FORMAT
   182 00006538 F6                  <1> 	DB	0F6H		; FILL BYTE FOR FORMAT
   183 00006539 0F                  <1> 	DB	15		; HEAD SETTLE TIME (MILLISECONDS)
   184 0000653A 08                  <1> 	DB	8		; MOTOR START TIME (1/8 SECONDS)
   185 0000653B 4F                  <1> 	DB	79		; MAX. TRACK NUMBER
   186 0000653C 00                  <1> 	DB	RATE_500	; DATA TRANSFER RATE
   187                              <1> ;--------------------------------------------------------
   188                              <1> ;	720 KB MEDIA IN 720 KB DRIVE			:
   189                              <1> ;--------------------------------------------------------
   190                              <1> MD_TBL4:
   191 0000653D DF                  <1> 	DB	11011111B	; SRT=D, HD UNLOAD=0F - 1ST SPECIFY BYTE
   192 0000653E 02                  <1> 	DB	2		; HD LOAD=1, MODE=DMA - 2ND SPECIFY BYTE
   193 0000653F 25                  <1> 	DB	MOTOR_WAIT	; WAIT TIME AFTER OPERATION TILL MOTOR OFF
   194 00006540 02                  <1> 	DB	2		; 512 BYTES/SECTOR
   195 00006541 09                  <1> 	DB	09		; EOT (LAST SECTOR ON TRACK)
   196 00006542 2A                  <1> 	DB	02AH		; GAP LENGTH
   197 00006543 FF                  <1> 	DB	0FFH		; DTL
   198 00006544 50                  <1> 	DB	050H		; GAP LENGTH FOR FORMAT
   199 00006545 F6                  <1> 	DB	0F6H		; FILL BYTE FOR FORMAT
   200 00006546 0F                  <1> 	DB	15		; HEAD SETTLE TIME (MILLISECONDS)
   201 00006547 08                  <1> 	DB	8		; MOTOR START TIME (1/8 SECONDS)
   202 00006548 4F                  <1> 	DB	79		; MAX. TRACK NUMBER
   203 00006549 80                  <1> 	DB	RATE_250	; DATA TRANSFER RATE
   204                              <1> ;--------------------------------------------------------
   205                              <1> ;	720 KB MEDIA IN 1.44 MB DRIVE			:
   206                              <1> ;--------------------------------------------------------
   207                              <1> MD_TBL5:
   208 0000654A DF                  <1> 	DB	11011111B	; SRT=D, HD UNLOAD=0F - 1ST SPECIFY BYTE
   209 0000654B 02                  <1> 	DB	2		; HD LOAD=1, MODE=DMA - 2ND SPECIFY BYTE
   210 0000654C 25                  <1> 	DB	MOTOR_WAIT	; WAIT TIME AFTER OPERATION TILL MOTOR OFF
   211 0000654D 02                  <1> 	DB	2		; 512 BYTES/SECTOR
   212 0000654E 09                  <1> 	DB	09		; EOT (LAST SECTOR ON TRACK)
   213 0000654F 2A                  <1> 	DB	02AH		; GAP LENGTH
   214 00006550 FF                  <1> 	DB	0FFH		; DTL
   215 00006551 50                  <1> 	DB	050H		; GAP LENGTH FOR FORMAT
   216 00006552 F6                  <1> 	DB	0F6H		; FILL BYTE FOR FORMAT
   217 00006553 0F                  <1> 	DB	15		; HEAD SETTLE TIME (MILLISECONDS)
   218 00006554 08                  <1> 	DB	8		; MOTOR START TIME (1/8 SECONDS)
   219 00006555 4F                  <1> 	DB	79		; MAX. TRACK NUMBER
   220 00006556 80                  <1> 	DB	RATE_250	; DATA TRANSFER RATE
   221                              <1> ;--------------------------------------------------------
   222                              <1> ;	1.44 MB MEDIA IN 1.44 MB DRIVE			:
   223                              <1> ;--------------------------------------------------------
   224                              <1> MD_TBL6:
   225 00006557 AF                  <1> 	DB	10101111B	; SRT=A, HD UNLOAD=0F - 1ST SPECIFY BYTE
   226 00006558 02                  <1> 	DB	2		; HD LOAD=1, MODE=DMA - 2ND SPECIFY BYTE
   227 00006559 25                  <1> 	DB	MOTOR_WAIT	; WAIT TIME AFTER OPERATION TILL MOTOR OFF
   228 0000655A 02                  <1> 	DB	2		; 512 BYTES/SECTOR
   229 0000655B 12                  <1> 	DB	18		; EOT (LAST SECTOR ON TRACK)
   230 0000655C 1B                  <1> 	DB	01BH		; GAP LENGTH
   231 0000655D FF                  <1> 	DB	0FFH		; DTL
   232 0000655E 6C                  <1> 	DB	06CH		; GAP LENGTH FOR FORMAT
   233 0000655F F6                  <1> 	DB	0F6H		; FILL BYTE FOR FORMAT
   234 00006560 0F                  <1> 	DB	15		; HEAD SETTLE TIME (MILLISECONDS)
   235 00006561 08                  <1> 	DB	8		; MOTOR START TIME (1/8 SECONDS)
   236 00006562 4F                  <1> 	DB	79		; MAX. TRACK NUMBER
   237 00006563 00                  <1> 	DB	RATE_500	; DATA TRANSFER RATE
   238                              <1> 
   239                              <1> 
   240                              <1> ; << diskette.inc >>
   241                              <1> ; +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
   242                              <1> ;
   243                              <1> ;----------------------------------------
   244                              <1> ;	ROM BIOS DATA AREAS		:
   245                              <1> ;----------------------------------------
   246                              <1> 
   247                              <1> ;DATA		SEGMENT AT 40H		; ADDRESS= 0040:0000
   248                              <1> 
   249                              <1> ;----------------------------------------
   250                              <1> ;	FIXED DISK DATA AREAS		:
   251                              <1> ;----------------------------------------
   252                              <1> 
   253                              <1> ;DISK_STATUS1:	DB	0		; FIXED DISK STATUS
   254                              <1> ;HF_NUM:	DB	0		; COUNT OF FIXED DISK DRIVES
   255                              <1> ;CONTROL_BYTE:	DB	0		; HEAD CONTROL BYTE
   256                              <1> ;@PORT_OFF	DB	?		; RESERVED (PORT OFFSET)
   257                              <1> 
   258                              <1> ;----------------------------------------
   259                              <1> ;	ADDITIONAL MEDIA DATA		:
   260                              <1> ;----------------------------------------
   261                              <1> 
   262                              <1> ;@LASTRATE	DB	?		; LAST DISKETTE DATA RATE SELECTED
   263                              <1> ;HF_STATUS	DB	0		; STATUS REGISTER
   264                              <1> ;HF_ERROR	DB	0		; ERROR REGISTER
   265                              <1> ;HF_INT_FLAG	DB	0		; FIXED DISK INTERRUPT FLAG
   266                              <1> ;HF_CNTRL	DB	0		; COMBO FIXED DISK/DISKETTE CARD BIT 0=1
   267                              <1> ;@DSK_STATE	DB	?		; DRIVE 0 MEDIA STATE
   268                              <1> ;		DB	?		; DRIVE 1 MEDIA STATE
   269                              <1> ;		DB	?		; DRIVE 0 OPERATION START STATE
   270                              <1> ;		DB	?		; DRIVE 1 OPERATION START STATE
   271                              <1> ;@DSK_TRK	DB	?		; DRIVE 0 PRESENT CYLINDER
   272                              <1> ;		DB	?		; DRIVE 1 PRESENT CYLINDER
   273                              <1> 
   274                              <1> ;DATA		ENDS			; END OF BIOS DATA SEGMENT
   275                              <1> ;
   276                              <1> ; +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
   277                              <1> 
   278                              <1> ERR_TBL:
   279 00006564 E0                  <1> 	db	NO_ERR
   280 00006565 024001BB            <1> 	db	BAD_ADDR_MARK,BAD_SEEK,BAD_CMD,UNDEF_ERR
   281 00006569 04BB100A            <1> 	db	RECORD_NOT_FND,UNDEF_ERR,BAD_ECC,BAD_SECTOR
   282                              <1> 
   283                              <1> ; 06/08/2022
   284                              <1> ; 17/12/2014 (mov ax, [cfd])
   285                              <1> ; 11/12/2014
   286                              <1> ;cfd:		db	0		; current floppy drive (for GET_PARM)
   287                              <1> ; 17/12/2014				; instead of 'DISK_POINTER'
   288                              <1> ;pfd:		db	1		; previous floppy drive (for GET_PARM)
   289                              <1> 					; (initial value of 'pfd 
   290                              <1> 					; must be different then 'cfd' value
   291                              <1> 					; to force updating/initializing
   292                              <1> 					; current drive parameters) 
   293                              <1> ; 06/08/2022 - TRDOS 386 Kernel v2.0.5
   294                              <1> ; 11/07/2022 - Retro UNIX 386 v1.1 (Kernel v0.2.1.5)
   295 0000656D FF                  <1> pfd:		db	0FFh
   296                              <1> 
   297                              <1> align 2
   298                              <1> 
   299 0000656E F001                <1> HF_PORT:	dw 	1F0h  ; Default = 1F0h
   300                              <1> 			      ; (170h)
   301 00006570 F603                <1> HF_REG_PORT:	dw	3F6h  ; HF_PORT + 206h
   302                              <1> 
   303                              <1> ; 05/01/2015 
   304 00006572 00                  <1> hf_m_s:         db      0     ; (0 = Master, 1 = Slave)
   305                              <1> 
   306                              <1> ; *****************************************************************************
  3244                                  
  3245 00006573 90                      Align 2
  3246                                  
  3247                                  ; 04/11/2014 (Retro UNIX 386 v1)
  3248 00006574 0000                    mem_1m_1k:   dw 0  ; Number of contiguous KB between
  3249                                                       ; 1 and 16 MB, max. 3C00h = 15 MB.
  3250 00006576 0000                    mem_16m_64k: dw 0  ; Number of contiguous 64 KB blocks
  3251                                  		   ; between 16 MB and 4 GB.
  3252                                  
  3253                                  ; 12/11/2014 (Retro UNIX 386 v1)
  3254 00006578 00                      boot_drv:    db 0 ; boot drive number (physical)
  3255                                  ; 24/11/2014
  3256 00006579 00                      drv:	     db 0 
  3257 0000657A 00                      last_drv:    db 0 ; last hdd
  3258 0000657B 00                      hdc:         db 0  ; number of hard disk drives
  3259                                  		     ; (present/detected)
  3260                                  
  3261                                  ; 24/11/2014 (Retro UNIX 386 v1)
  3262                                  ; Physical drive type & flags
  3263 0000657C 00                      fd0_type:    db 0  ; floppy drive type
  3264 0000657D 00                      fd1_type:    db 0  ; 4 = 1.44 Mb, 80 track, 3.5" (18 spt)
  3265                                  		     ; 6 = 2.88 Mb, 80 track, 3.5" (36 spt)
  3266                                  		     ; 3 = 720 Kb, 80 track, 3.5" (9 spt)
  3267                                  		     ; 2 = 1.2 Mb, 80 track, 5.25" (15 spt)
  3268                                  		     ; 1 = 360 Kb, 40 track, 5.25" (9 spt)		
  3269 0000657E 00                      hd0_type:    db 0  ; EDD status for hd0 (bit 7 = present flag)
  3270 0000657F 00                      hd1_type:    db 0  ; EDD status for hd1 (bit 7 = present flag)
  3271 00006580 00                      hd2_type:    db 0  ; EDD status for hd2 (bit 7 = present flag)
  3272 00006581 00                      hd3_type:    db 0  ; EDD status for hd3 (bit 7 = present flag)
  3273                                  		     ; bit 0 - Fixed disk access subset supported
  3274                                  		     ; bit 1 - Drive locking and ejecting
  3275                                  		     ; bit 2 - Enhanced disk drive support
  3276                                  		     ; bit 3 = Reserved (64 bit EDD support)
  3277                                  		     ; (If bit 0 is '1' Retro UNIX 386 v1
  3278                                  		     ; will interpret it as 'LBA ready'!)
  3279                                  
  3280                                  ; 08/08/2022
  3281                                  ; (drv.cylinders, drv.spt, drv.spt will not be used now on)
  3282                                  ; ('diskio.inc')
  3283                                  ; ((spt and heads and cylinder counts will be taken from DPT))
  3284                                  
  3285                                  ;; 11/03/2015 - 10/07/2015
  3286                                  ;drv.cylinders: dw 0,0,0,0,0,0,0
  3287                                  ;drv.heads:     dw 0,0,0,0,0,0,0
  3288                                  ;drv.spt:       dw 0,0,0,0,0,0,0
  3289                                  ; 12/07/2022 - 11/03/2015
  3290 00006582 000000000000000000-     drv.size:      dd 0,0,0,0,0,0,0
  3290 0000658B 000000000000000000-
  3290 00006594 000000000000000000-
  3290 0000659D 00                 
  3291 0000659E 00000000000000          drv.status:    db 0,0,0,0,0,0,0
  3292 000065A5 00000000000000          drv.error:     db 0,0,0,0,0,0,0
  3293                                  ;
  3294                                  
  3295                                  Align 2
  3296                                  
  3297                                  ;;; 11/03/2015
  3298                                  %include 'kybdata.s'	; KEYBOARD (BIOS) DATA
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel) - v2.0.5 - kybdata.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 24/07/2022 (Previous: 17/01/2016)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 17/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Turkish Rational DOS
    11                              <1> ; Operating System Project v2.0 by ERDOGAN TAN (Beginning: 04/01/2016)
    12                              <1> ;
    13                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    14                              <1> ; kybdata.inc (11/03/2015)
    15                              <1> ;
    16                              <1> ; Derived from 'IBM PC-XT-286' BIOS source code (1986) 
    17                              <1> ; ****************************************************************************
    18                              <1> 
    19                              <1> ; Retro UNIX 386 v1 Kernel - KYBDATA.INC
    20                              <1> ; Last Modification: 11/03/2015
    21                              <1> ;		 (Data Section for 'KEYBOARD.INC')	
    22                              <1> ;
    23                              <1> ; ///////// KEYBOARD DATA ///////////////
    24                              <1> 
    25                              <1> ; 24/07/2022 - TRDOS 386 Kernel v2.0.5
    26                              <1> ; 05/12/2014
    27                              <1> ; 04/12/2014 (derived from pc-xt-286 bios source code -1986-) 
    28                              <1> ; 03/06/86  KEYBOARD BIOS
    29                              <1> 
    30                              <1> ;---------------------------------------------------------------------------------
    31                              <1> ;	KEY IDENTIFICATION SCAN TABLES
    32                              <1> ;---------------------------------------------------------------------------------
    33                              <1> 
    34                              <1> ;-----	TABLES FOR ALT CASE ------------
    35                              <1> ;-----	ALT-INPUT-TABLE 
    36 000065AC 524F50514B          <1> K30:	db	82,79,80,81,75
    37 000065B1 4C4D474849          <1> 	db	76,77,71,72,73		; 10 NUMBER ON KEYPAD
    38                              <1> ;-----	SUPER-SHIFT-TABLE 
    39 000065B6 101112131415        <1> 	db	16,17,18,19,20,21	; A-Z TYPEWRITER CHARS
    40 000065BC 161718191E1F        <1> 	db	22,23,24,25,30,31
    41 000065C2 202122232425        <1> 	db	32,33,34,35,36,37
    42 000065C8 262C2D2E2F30        <1> 	db	38,44,45,46,47,48
    43 000065CE 3132                <1> 	db	49,50
    44                              <1> 
    45                              <1> ;-----	TABLE OF SHIFT KEYS AND MASK VALUES
    46                              <1> ;-----	KEY_TABLE 
    47 000065D0 52                  <1> _K6:    db      INS_KEY                 ; INSERT KEY
    48 000065D1 3A4546381D          <1> 	db	CAPS_KEY,NUM_KEY,SCROLL_KEY,ALT_KEY,CTL_KEY
    49 000065D6 2A36                <1>         db      LEFT_KEY,RIGHT_KEY
    50                              <1> _K6L    equ     $-_K6
    51                              <1> 
    52                              <1> ;-----	MASK_TABLE
    53 000065D8 80                  <1> _K7:    db      INS_SHIFT               ; INSERT MODE SHIFT
    54 000065D9 4020100804          <1> 	db	CAPS_SHIFT,NUM_SHIFT,SCROLL_SHIFT,ALT_SHIFT,CTL_SHIFT
    55 000065DE 0201                <1> 	db	LEFT_SHIFT,RIGHT_SHIFT
    56                              <1> 
    57                              <1> ;-----	TABLES FOR CTRL CASE		;---- CHARACTERS ------
    58 000065E0 1BFF00FFFFFF        <1> _K8:	db	27,-1,0,-1,-1,-1	; Esc, 1, 2, 3, 4, 5
    59 000065E6 1EFFFFFFFF1F        <1> 	db 	30,-1,-1,-1,-1,31	; 6, 7, 8, 9, 0, -
    60                              <1> 	;db	-1,127,-1,17,23,5	; =, Bksp, Tab, Q, W, E
    61 000065EC FF7F94111705        <1> 	db	-1,127,148,17,23,5 ; 24/07/2022
    62 000065F2 12141915090F        <1> 	db	18,20,25,21,9,15	; R, T, Y, U, I, O
    63 000065F8 101B1D0AFF01        <1> 	db	16,27,29,10,-1,1	; P, [, ], Enter, Ctrl, A
    64 000065FE 13040607080A        <1> 	db	19,4,6,7,8,10		; S, D, F, G, H, J
    65 00006604 0B0CFFFFFFFF        <1> 	db	11,12,-1,-1,-1,-1	; K, L, :, ', `, LShift
    66 0000660A 1C1A18031602        <1> 	db	28,26,24,3,22,2		; Bkslash, Z, X, C, V, B
    67 00006610 0E0DFFFFFFFF        <1> 	db	14,13,-1,-1,-1,-1	; N, M, ,, ., /, RShift
    68 00006616 96FF20FF            <1> 	db	150,-1,' ',-1		; *, ALT, Spc, CL
    69                              <1> 	;				;----- FUNCTIONS ------		
    70 0000661A 5E5F60616263        <1> 	db 	94,95,96,97,98,99	; F1 - F6
    71 00006620 64656667FFFF        <1> 	db	100,101,102,103,-1,-1	; F7 - F10, NL, SL
    72 00006626 778D848E738F        <1> 	db	119,141,132,142,115,143	; Home, Up, PgUp, -, Left, Pad5
    73 0000662C 749075917692        <1> 	db 	116,144,117,145,118,146 ; Right, +, End, Down, PgDn, Ins
    74 00006632 93FFFFFF898A        <1> 	db	147,-1,-1,-1,137,138	; Del, SysReq, Undef, WT, F11, F12
    75                              <1> 
    76                              <1> ;-----	TABLES FOR LOWER CASE ----------
    77 00006638 1B3132333435363738- <1> K10:	db 	27,'1234567890-=',8,9
    77 00006641 39302D3D0809        <1>
    78 00006647 71776572747975696F- <1> 	db 	'qwertyuiop[]',13,-1,'asdfghjkl;',39
    78 00006650 705B5D0DFF61736466- <1>
    78 00006659 67686A6B6C3B27      <1>
    79 00006660 60FF5C7A786376626E- <1> 	db	96,-1,92,'zxcvbnm,./',-1,'*',-1,' ',-1
    79 00006669 6D2C2E2FFF2AFF20FF  <1>
    80                              <1> ;-----	LC TABLE SCAN
    81 00006672 3B3C3D3E3F          <1> 	db	59,60,61,62,63		; BASE STATE OF F1 - F10
    82 00006677 4041424344          <1> 	db	64,65,66,67,68
    83 0000667C FFFF                <1> 	db	-1,-1			; NL, SL
    84                              <1> 
    85                              <1> ;-----	KEYPAD TABLE
    86 0000667E 474849FF4BFF        <1> K15:	db	71,72,73,-1,75,-1	; BASE STATE OF KEYPAD KEYS
    87 00006684 4DFF4F50515253      <1> 	db	77,-1,79,80,81,82,83
    88 0000668B FFFF5C8586          <1> 	db	-1,-1,92,133,134	; SysRq, Undef, WT, F11, F12
    89                              <1> 
    90                              <1> ;-----	TABLES FOR UPPER CASE ----------
    91 00006690 1B21402324255E262A- <1> K11:	db 	27,'!@#$%',94,'&*()_+',8,0
    91 00006699 28295F2B0800        <1>
    92 0000669F 51574552545955494F- <1> 	db 	'QWERTYUIOP{}',13,-1,'ASDFGHJKL:"'
    92 000066A8 507B7D0DFF41534446- <1>
    92 000066B1 47484A4B4C3A22      <1>
    93 000066B8 7EFF7C5A584356424E- <1> 	db	126,-1,'|ZXCVBNM<>?',-1,'*',-1,' ',-1
    93 000066C1 4D3C3E3FFF2AFF20FF  <1>
    94                              <1> ;-----	UC TABLE SCAN
    95 000066CA 5455565758          <1> K12:	db	84,85,86,87,88		; SHIFTED STATE OF F1 - F10
    96 000066CF 595A5B5C5D          <1> 	db	89,90,91,92,93
    97 000066D4 FFFF                <1> 	db	-1,-1			; NL, SL
    98                              <1> 
    99                              <1> ;-----	NUM STATE TABLE
   100 000066D6 3738392D3435362B31- <1> K14:	db 	'789-456+1230.'		; NUMLOCK STATE OF KEYPAD KEYS
   100 000066DF 3233302E            <1>
   101                              <1> 	;
   102 000066E3 FFFF7C8788          <1> 	db	-1,-1,124,135,136	; SysRq, Undef, WT, F11, F12
   103                              <1> 
   104                              <1> ; 26/08/2014
   105                              <1> ; Retro UNIX 8086 v1 - UNIX.ASM (03/03/2014)
   106                              <1> ; Derived from IBM "pc-at" 
   107                              <1> ; rombios source code (06/10/1985)
   108                              <1> ; 'dseg.inc'
   109                              <1> 
   110                              <1> ;---------------------------------------;
   111                              <1> ;	SYSTEM DATA AREA		;
   112                              <1> ;----------------------------------------
   113 000066E8 00                  <1> BIOS_BREAK	db	0		; BIT 7=1 IF BREAK KEY HAS BEEN PRESSED
   114                              <1> 
   115                              <1> ;----------------------------------------
   116                              <1> ;	KEYBOARD DATA AREAS		;
   117                              <1> ;----------------------------------------
   118                              <1> 
   119 000066E9 00                  <1> KB_FLAG		db	0		; KEYBOARD SHIFT STATE AND STATUS FLAGS
   120 000066EA 00                  <1> KB_FLAG_1	db	0		; SECOND BYTE OF KEYBOARD STATUS
   121 000066EB 00                  <1> KB_FLAG_2	db	0		; KEYBOARD LED FLAGS
   122 000066EC 00                  <1> KB_FLAG_3	db	0		; KEYBOARD MODE STATE AND TYPE FLAGS
   123 000066ED 00                  <1> ALT_INPUT	db	0		; STORAGE FOR ALTERNATE KEY PAD ENTRY
   124 000066EE [FE660000]          <1> BUFFER_START	dd	KB_BUFFER 	; OFFSET OF KEYBOARD BUFFER START
   125 000066F2 [1E670000]          <1> BUFFER_END	dd	KB_BUFFER + 32	; OFFSET OF END OF BUFFER
   126 000066F6 [FE660000]          <1> BUFFER_HEAD	dd	KB_BUFFER 	; POINTER TO HEAD OF KEYBOARD BUFFER
   127 000066FA [FE660000]          <1> BUFFER_TAIL	dd	KB_BUFFER 	; POINTER TO TAIL OF KEYBOARD BUFFER
   128                              <1> ; ------	HEAD = TAIL INDICATES THAT THE BUFFER IS EMPTY
   129 000066FE 0000<rep 10h>       <1> KB_BUFFER	times	16 dw 0		; ROOM FOR 16 SCAN CODE ENTRIES
   130                              <1> 
   131                              <1> ; /// End Of KEYBOARD DATA ///
  3299                                  %include 'vidata.s'	; VIDEO (BIOS) DATA
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel) - v2.0.7 - vidata.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 17/10/2023 (Previous: 24/11/2020)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 16/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Turkish Rational DOS
    11                              <1> ; Operating System Project v2.0 by ERDOGAN TAN (Beginning: 04/01/2016)
    12                              <1> ;
    13                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    14                              <1> ; vidata.inc (11/03/2015)
    15                              <1> ;
    16                              <1> ; Derived from 'IBM PC-AT' BIOS source code (1985) 
    17                              <1> ; ****************************************************************************
    18                              <1> 
    19                              <1> ; Retro UNIX 386 v1 Kernel - VIDATA.S
    20                              <1> ; Last Modification: 11/03/2015
    21                              <1> ;		    (Data section for 'VIDEO.INC')	
    22                              <1> ;
    23                              <1> ; ///////// VIDEO DATA ///////////////
    24                              <1> 
    25                              <1> ;----------------------------------------
    26                              <1> ;	VIDEO DISPLAY DATA AREA		;
    27                              <1> ;----------------------------------------
    28 0000671E 03                  <1> CRT_MODE:	db	3	; CURRENT DISPLAY MODE (TYPE)
    29 0000671F 29                  <1> CRT_MODE_SET:	db	29h	; CURRENT SETTING OF THE 3X8 REGISTER
    30                              <1> 				; (29h default setting for video mode 3)
    31                              <1> 				; Mode Select register Bits
    32                              <1> 				;   BIT 0 - 80x25 (1), 40x25 (0)
    33                              <1> 				;   BIT 1 - ALPHA (0), 320x200 GRAPHICS (1)
    34                              <1> 				;   BIT 2 - COLOR (0), BW (1)
    35                              <1> 				;   BIT 3 - Video Sig. ENABLE (1), DISABLE (0)
    36                              <1> 				;   BIT 4 - 640x200 B&W Graphics Mode (1)
    37                              <1> 				;   BIT 5 - ALPHA mode BLINKING (1)
    38                              <1> 				;   BIT 6, 7 - Not Used
    39                              <1> 
    40                              <1> ; Mode 0 - 2Ch = 101100b	; 40x25 text, 16 gray colors
    41                              <1> ; Mode 1 - 28h = 101000b	; 40x25 text, 16 fore colors, 8 back colors
    42                              <1> ; Mode 2 - 2Dh = 101101b	; 80x25 text, 16 gray colors	
    43                              <1> ; Mode 3 - 29h = 101001b	; 80x25 text, 16 fore color, 8 back color
    44                              <1> ; Mode 4 - 2Ah = 101010b	; 320x200 graphics, 4 colors
    45                              <1> ; Mode 5 - 2Eh = 101110b	; 320x200 graphics, 4 gray colors
    46                              <1> ; Mode 6 - 1Eh = 011110b	; 640x200 graphics, 2 colors
    47                              <1> ; Mode 7 - 29h = 101001b	; 80x25 text, black & white colors
    48                              <1> ; Mode & 37h = Video signal OFF
    49                              <1> 
    50                              <1> ; 24/06/2016
    51 00006720 50                  <1> CRT_COLS:	db	80	; Number of columns
    52                              <1> 
    53                              <1> ; 01/07/2016
    54 00006721 00                  <1> CRT_PALETTE:	db 	0	; Current palette setting
    55                              <1> 
    56                              <1> ; 03/07/2016
    57 00006722 10                  <1> CHAR_HEIGHT:	db	16	; Default character height
    58 00006723 60                  <1> VGA_VIDEO_CTL:	db	60h	; ROM BIOS DATA AREA Offset 87h
    59 00006724 F9                  <1> VGA_SWITCHES:	db 	0F9h	; Feature Bit Switches (the basic screen)
    60 00006725 51                  <1> VGA_MODESET_CTL: db	051h	; Basic mode set options (VGA video flags)
    61                              <1> 				; ROM BIOS DATA AREA Offset 89h
    62                              <1> 				; Bit 7, 4 : Mode
    63                              <1> 				;	  01 : 400-line mode
    64                              <1> 				; Bit 6	: Display switch enabled = 1			
    65                              <1> 				; Bit 5	: Reserved = 0
    66                              <1> 				; Bit 3	: Default palette loading 
    67                              <1> 				;	  disabled = 0
    68                              <1> 				; Bit 2 : Color monitor = 0
    69                              <1> 				; Bit 1 = Gray scale summing 
    70                              <1> 				;	  disabled = 0
    71                              <1> 				; Bit 0 = VGA active = 1
    72 00006726 19                  <1> VGA_ROWS:	db	25
    73                              <1> 
    74                              <1> ; 16/01/2016
    75                              <1> chr_attrib:  ; Character color/attributes for video pages (0 to 7)
    76 00006727 0707070707070707    <1> 	db	07h, 07h, 07h, 07h, 07h, 07h, 07h, 07h
    77                              <1> ; 30/01/2016
    78                              <1> vmode:
    79 0000672F 0303030303030303    <1> 	db	3,3,3,3,3,3,3,3 ; video modes for pseudo screens 
    80                              <1> 
    81                              <1> CURSOR_MODE: ; cursor start (ch) = 14, cursor end (cl) = 15
    82 00006737 0F0E                <1> 	db	15, 14 ; 07/07/2016 - TRDOS 386 (TRDOS v2.0)
    83                              <1> 
    84                              <1> ;align 4
    85                              <1> ;VGA_BASE: ; 26/07/2016
    86                              <1> ;	dd	 0B8000h  ; (Mode < 0Dh) or 0A0000h (mode >= 0Dh)
    87                              <1> 
    88 00006739 90                  <1> align 2
    89                              <1> 
    90                              <1> vga_modes:
    91                              <1> 	; 25/07/2016
    92                              <1> 	; 09/07/2016
    93                              <1> 	; 03/07/2016
    94                              <1> 	; valid (implemented) video modes (>7, extension to IBM PC CGA modes)
    95 0000673A 0302010007040506    <1> 	db 	03h, 02h, 01h, 00h, 07h, 04h, 05h, 06h
    96                              <1> vga_g_modes: ; 31/07/2016
    97 00006742 13F0126A0D0E1011    <1> 	db	13h, 0F0h, 12h, 6Ah, 0Dh, 0Eh, 10h, 11h
    98                              <1> vga_mode_count equ $ - vga_modes
    99                              <1> vga_g_mode_count equ $ - vga_g_modes
   100                              <1> 
   101                              <1> vga_mode_tbl_ptr:
   102                              <1> 	; 25/07/2016
   103 0000674A [AA670000]          <1> 	dd	vga_mode_03h
   104 0000674E [AA670000]          <1> 	dd	vga_mode_03h ; mode 02h -> mode 03h 
   105 00006752 [EA670000]          <1> 	dd	vga_mode_01h
   106 00006756 [EA670000]          <1> 	dd	vga_mode_01h ; mode 00h -> mode 01h
   107                              <1> 	;dd	vga_mode_07h
   108 0000675A [AA670000]          <1> 	dd	vga_mode_03h ; mode 07h -> mode 03h
   109 0000675E [2A680000]          <1> 	dd	vga_mode_04h
   110 00006762 [2A680000]          <1> 	dd	vga_mode_04h ; mode 05h -> mode 04h	
   111 00006766 [6A680000]          <1> 	dd	vga_mode_06h
   112 0000676A [AA680000]          <1> 	dd	vga_mode_13h
   113 0000676E [EA680000]          <1> 	dd	vga_mode_F0h
   114 00006772 [2A690000]          <1> 	dd	vga_mode_12h
   115 00006776 [6A690000]          <1> 	dd	vga_mode_6Ah
   116 0000677A [AA690000]          <1> 	dd	vga_mode_0Dh
   117 0000677E [EA690000]          <1> 	dd	vga_mode_0Eh
   118 00006782 [2A6A0000]          <1> 	dd	vga_mode_10h
   119 00006786 [6A6A0000]          <1> 	dd	vga_mode_11h	
   120                              <1> 
   121                              <1> vga_memmodel: 
   122                              <1> 	; 25/07/2016
   123                              <1> 	; 07/07/2016
   124                              <1> 	CTEXT	equ 0
   125                              <1> 	;MTEXT	equ 1
   126                              <1> 	MTEXT	equ 0 ; mode 07h -> mode 03h
   127                              <1> 	CGA	equ 2
   128                              <1> 	LINEAR8 equ 5
   129                              <1> 	PLANAR4	equ 4
   130                              <1> 	PLANAR1	equ 3
   131 0000678A 0000000000020202    <1> 	db	CTEXT, CTEXT, CTEXT, CTEXT, MTEXT, CGA, CGA, CGA
   132                              <1> vga_g_memmodel: ; 31/07/2016
   133 00006792 0504040404040403    <1> 	db	LINEAR8, PLANAR4, PLANAR4, PLANAR4, PLANAR4, PLANAR4, PLANAR4, PLANAR1
   134                              <1> ;vga_pixbits:
   135                              <1> ;	; 25/07/2016
   136                              <1> ;	; 08/07/2016
   137                              <1> ;	db 	4, 4, 4, 4, 4, 2, 2, 1, 8, 4, 4, 4, 4, 4, 4, 1
   138                              <1> vga_dac_s:
   139 0000679A 020202020001010103- <1> 	db	2, 2, 2, 2, 0, 1, 1, 1, 3, 3, 2, 2, 1, 1, 2, 2  
   139 000067A3 03020201010202      <1>
   140                              <1> 						; (vgatables.h, VGAMODES, dac) 
   141                              <1> 						; 17/11/2020
   142                              <1> vga_params:
   143                              <1> 	; 23/11/2020
   144                              <1> 	; 16/11/2020
   145                              <1> 	; 09/11/2020, 10/11/2020, 11/11/2020 (TRDOS 386 v2.0.3)
   146                              <1> 	; 25/07/2016 
   147                              <1> 	; 19/07/2016
   148                              <1> 	; 03/07/2016
   149                              <1> 	; derived from 'Plex86/Bochs VGABios' source code
   150                              <1> 	; vgabios-0.7a (2011)
   151                              <1> 	; by the LGPL VGABios Developers Team (2001-2008)
   152                              <1> 	; 'vgatables.h'
   153                              <1> 	; Oracle VirtualBox 5.0.24 VGABios Source Code
   154                              <1> 	; ('vgabios.c', 'vgatables.h', 'vgafonts.h', 'vgarom.asm')
   155                              <1> 
   156                              <1> 	; 09/11/2020
   157                              <1> 	; Block Structure of Video Parameter Table
   158                              <1> 	;
   159                              <1> 	; Offset	# Bytes		Contents
   160                              <1> 	;
   161                              <1> 	;  0		1		# columns
   162                              <1> 	;  1		1  		# rows - 1 
   163                              <1> 	;  2		1		Pixels/character
   164                              <1> 	;  3-4		2		Page length		
   165                              <1> 	;  5-8		4		Sequencer Registers
   166                              <1> 	;  9		1		Miscellaneous Register	
   167                              <1> 	;  10-34	25		CRTC Registers
   168                              <1> 	;  35-54	20		Attribute Registers
   169                              <1> 	;  55-63	9		Graphics Controller Registers
   170                              <1> 	;
   171                              <1> 	; Ref: Programmer's Guide to EGA, VGA, and Super VGA cards
   172                              <1> 	; (Richard F. Ferraro, 1994)  
   173                              <1> 
   174                              <1> 	;
   175                              <1> vga_mode_03h:  ; mode 03h, 80*25 text, CGA colors
   176                              <1> 	; 11/11/2020
   177 000067AA 5018100010          <1>  	db	80, 24, 16, 00h, 10h ; tw, th-1, ch, slength (5)
   178 000067AF 00030002            <1>  	db	00h, 03h, 00h, 02h ; sequ regs (4)
   179 000067B3 67                  <1>  	db	67h	; misc reg (1)
   180 000067B4 5F4F50825581BF1F    <1>  	db	5Fh, 4Fh, 50h, 82h, 55h, 81h, 0BFh, 1Fh
   181                              <1>  	; 09/11/2020
   182                              <1> 	;db	5Fh, 4Fh, 50h, 82h, 54h, 80h, 0BFh, 1Fh
   183 000067BC 004F                <1> 	db	00h, 4Fh
   184                              <1> vga_p_cm_pos equ $ - vga_mode_03h
   185 000067BE 0D0E00000000        <1> 	db	0Dh, 0Eh, 00h, 00h, 00h, 00h
   186 000067C4 9C8E8F281F96B9A3    <1>  	db	9Ch, 8Eh, 8Fh, 28h, 1Fh, 96h, 0B9h, 0A3h
   187 000067CC FF                  <1> 	db	0FFh	; crtc_regs (25)
   188 000067CD 0001020304051407    <1> 	db	00h, 01h, 02h, 03h, 04h, 05h, 14h, 07h
   189 000067D5 38393A3B3C3D3E3F    <1>  	db	38h, 39h, 3Ah, 3Bh, 3Ch, 3Dh, 3Eh, 3Fh
   190                              <1>  	; 17/10/2023
   191 000067DD 0C000F08            <1> 	db	0Ch, 00h, 0Fh, 08h  ; actl regs (20)
   192                              <1> 	;db	0Ch, 00h, 0Fh, 00h  ; 19/11/2020
   193 000067E1 0000000000100E0FFF  <1> 	db	00h, 00h, 00h, 00h, 00h, 10h, 0Eh, 0Fh, 0FFh ; grdc regs (9)
   194                              <1> 	; 09/11/2020
   195                              <1> 	;db	00h, 00h, 00h, 00h, 00h, 10h, 0Eh, 00h, 0FFh ; grdc regs (9)
   196                              <1> vga_mode_01h:	; mode 01h, 40*25 text, CGA colors
   197 000067EA 2818100008          <1> 	db	40, 24, 16, 00h, 08h ; tw, th-1, ch, slength
   198 000067EF 08030002            <1> 	db	08h, 03h, 00h, 02h  ; sequ regs
   199 000067F3 67                  <1> 	db	67h	; misc reg
   200 000067F4 2D2728902BA0BF1F    <1> 	db	2Dh, 27h, 28h, 90h, 2Bh, 0A0h, 0BFh, 1Fh
   201 000067FC 004F0D0E00000000    <1> 	db	00h, 4Fh, 0Dh, 0Eh, 00h, 00h, 00h, 00h
   202 00006804 9C8E8F141F96B9A3    <1> 	db	9Ch, 8Eh, 8Fh, 14h, 1Fh, 96h, 0B9h, 0A3h
   203 0000680C FF                  <1> 	db	0FFh	; crtc_regs
   204 0000680D 0001020304051407    <1> 	db	00h, 01h, 02h, 03h, 04h, 05h, 14h, 07h
   205 00006815 38393A3B3C3D3E3F    <1> 	db	38h, 39h, 3Ah, 3Bh, 3Ch, 3Dh, 3Eh, 3Fh
   206                              <1>  	;db	0Ch, 00h, 0Fh, 08h  ; actl regs (20)
   207 0000681D 0C000F00            <1> 	db	0Ch, 00h, 0Fh, 00h  ; 19/11/2020
   208 00006821 0000000000100E0FFF  <1> 	db	00h, 00h, 00h, 00h, 00h, 10h, 0Eh, 0Fh, 0FFh ; grdc regs
   209                              <1> ;vga_mode_07h:	; mode 07h, 80*25 text, mono color
   210                              <1> ;	db	80, 24, 16, 00h, 10h  ; tw, th-1, ch, slength
   211                              <1> ;	db	00h, 03h, 00h, 02h ; sequ regs
   212                              <1> ;	db	66h	; misc reg
   213                              <1> ;	db	5Fh, 4Fh, 50h, 82h, 55h, 81h, 0BFh, 1Fh
   214                              <1> ;	db	00h, 4Fh, 0Dh, 0Eh, 00h, 00h, 00h, 00h
   215                              <1> ;	db	9Ch, 8Eh, 8Fh, 28h, 0Fh, 96h, 0B9h, 0A3h
   216                              <1> ;	db	0FFh	; crtc regs
   217                              <1> ;	db	00h, 08h, 08h, 08h, 08h, 08h, 08h, 08h
   218                              <1> ;	db	10h, 18h, 18h, 18h, 18h, 18h, 18h, 18h
   219                              <1> ;	db	0Eh, 00h, 0Fh, 08h  ; actl regs
   220                              <1> ;	db	00h, 00h, 00h, 00h, 00h, 10h, 0Ah, 0Fh, 0FFh ; grdc regs
   221                              <1> vga_mode_04h:	; 320*200 graphics, 4 colors, CGA
   222                              <1> 	; 11/11/2020
   223 0000682A 2818080040          <1> 	db	40, 24, 8, 00h, 40h ; tw, th-1, ch, slength
   224 0000682F 09030002            <1> 	db	09h, 03h, 00h, 02h ; sequ regs
   225 00006833 63                  <1> 	db	63h	; misc reg
   226 00006834 2D2728902B80BF1F    <1> 	db	2Dh, 27h, 28h, 90h, 2Bh, 80h, 0BFh, 1Fh
   227 0000683C 00C1000000000000    <1> 	db	00h, 0C1h, 00h, 00h, 00h, 00h, 00h, 00h
   228 00006844 9C8E8F140096B9A2    <1> 	db	9Ch, 8Eh, 8Fh, 14h, 00h, 96h, 0B9h, 0A2h
   229 0000684C FF                  <1> 	db	0FFh	; crtc_regs
   230 0000684D 0013151702040607    <1> 	db	00h, 13h, 15h, 17h, 02h, 04h, 06h, 07h
   231 00006855 1011121314151617    <1> 	db	10h, 11h, 12h, 13h, 14h, 15h, 16h, 17h
   232 0000685D 01000300            <1> 	db	01h, 00h, 03h, 00h ; actl regs
   233 00006861 0000000000300F0FFF  <1> 	db 	00h, 00h, 00h, 00h, 00h, 30h, 0Fh, 0Fh, 0FFh ; grdc regs
   234                              <1> vga_mode_06h:	; 640*200 graphics, 2 colors, CGA
   235                              <1> 	; 11/11/2020
   236 0000686A 5018080040          <1> 	db	80, 24, 8, 00h, 40h   ;	tw, th-1, ch, slength
   237 0000686F 01010006            <1> 	db	01h, 01h, 00h, 06h ; sequ regs
   238 00006873 63                  <1> 	db	63h	; misc reg
   239 00006874 5F4F50825480BF1F    <1> 	db	5Fh, 4Fh, 50h, 82h, 54h, 80h, 0BFh, 1Fh
   240 0000687C 00C1000000000000    <1> 	db	00h, 0C1h, 00h, 00h, 00h, 00h, 00h, 00h
   241 00006884 9C8E8F280096B9C2    <1> 	db	9Ch, 8Eh, 8Fh, 28h, 00h, 96h, 0B9h, 0C2h
   242 0000688C FF                  <1> 	db	0FFh	; crtc regs
   243 0000688D 0017171717171717    <1> 	db	00h, 17h, 17h, 17h, 17h, 17h, 17h, 17h
   244 00006895 1717171717171717    <1> 	db	17h, 17h, 17h, 17h, 17h, 17h, 17h, 17h
   245 0000689D 01000100            <1> 	db	01h, 00h, 01, 00h  ; actl regs
   246 000068A1 0000000000000D0FFF  <1> 	db	00h, 00h, 00h, 00h, 00h, 00h, 0Dh, 0Fh, 0FFh ; grdc regs
   247                              <1> vga_mode_13h:  ; mode 13h, 300*200, 256 colors, linear
   248                              <1> 	; 11/11/2020
   249                              <1> 	;db 	40, 24, 8, 00h, 20h ; tw, th-1, ch, slength (5)
   250                              <1> 	; 23/11/2020 - 10/11/2020
   251 000068AA 28180800FA          <1> 	db 	40, 24, 8, 00h, 0FAh ; tw, th-1, ch, slength (5)
   252 000068AF 010F000E            <1> 	db	01h, 0Fh, 00h, 0Eh ; sequ regs (4)
   253 000068B3 63                  <1> 	db	63h	; misc reg (1)
   254 000068B4 5F4F50825480BF1F    <1> 	db	5Fh, 4Fh, 50h, 82h, 54h, 80h, 0BFh, 1Fh 
   255 000068BC 0041000000000000    <1> 	db 	00h, 041h, 00h, 00h, 00h, 00h, 00h, 00h
   256 000068C4 9C8E8F284096B9A3    <1> 	db	9Ch, 8Eh, 8Fh, 28h, 40h, 96h, 0B9h, 0A3h
   257                              <1> 	;db	9Ch, 0Eh, 8Fh, 28h, 40h, 96h, 0B9h, 0A3h ; 17/10/2023
   258 000068CC FF                  <1> 	db	0FFh	; crtc regs (25)
   259 000068CD 0001020304050607    <1> 	db	00h, 01h, 02h, 03h, 04h, 05h, 06h, 07h
   260 000068D5 08090A0B0C0D0E0F    <1>  	db	08h, 09h, 0Ah, 0Bh, 0Ch, 0Dh, 0Eh, 0Fh
   261 000068DD 41000F00            <1>  	db	41h, 00h, 0Fh, 00h  ; actl regs (20)
   262                              <1> 	; 10/11/2020
   263                              <1>  	;db	41h, 01h, 0Fh, 13h  ; actl regs (20) 
   264 000068E1 000000000040050FFF  <1> 	db	00h, 00h, 00h, 00h, 00h, 40h, 05h, 0Fh, 0FFh ; grdc regs (9)
   265                              <1> vga_mode_setl equ $ - vga_mode_13h  ; = 64
   266                              <1> vga_mode_F0h:  ; mode X ; 320*240, 256 colors, planar
   267 000068EA 2818080000          <1> 	db 	40, 24, 8, 00h, 00h ; tw, th-1, ch, slength
   268 000068EF 010F0006            <1> 	db	01h, 0Fh, 00h, 06h ; sequ regs
   269 000068F3 E3                  <1> 	db	0E3h	; misc reg
   270 000068F4 5F4F508254800D3E    <1> 	db	5Fh, 4Fh, 50h, 82h, 54h, 80h, 0Dh, 3Eh 
   271 000068FC 0041000000000000    <1>  	db 	00h, 41h, 00h, 00h, 00h, 00h, 00h, 00h
   272 00006904 EAACDF2800E706E3    <1> 	db	0EAh, 0ACh, 0DFh, 28h, 00h, 0E7h, 06h, 0E3h
   273 0000690C FF                  <1> 	db	0FFh	; crtc regs (25)
   274 0000690D 0001020304050607    <1> 	db	00h, 01h, 02h, 03h, 04h, 05h, 06h, 07h
   275 00006915 08090A0B0C0D0E0F    <1>  	db	08h, 09h, 0Ah, 0Bh, 0Ch, 0Dh, 0Eh, 0Fh
   276 0000691D 41000F00            <1>  	db	41h, 00h, 0Fh, 00h  ; actl regs
   277 00006921 000000000040050FFF  <1> 	db	00h, 00h, 00h, 00h, 00h, 40h, 05h, 0Fh, 0FFh ; grdc regs
   278                              <1> vga_mode_12h:  ; mode 12h, 640*480, 16 colors, planar
   279                              <1> 	; 11/11/2020
   280                              <1>  	;db 	80, 29, 16, 0, 0 ; tw, th-1, ch, slength
   281                              <1> 	; 09/11/2020
   282 0000692A 501D1000A0          <1>  	db 	80, 29, 16, 00h, 0A0h ; tw, th-1, ch, slength
   283 0000692F 010F0006            <1> 	db	01h, 0Fh, 00h, 06h ; sequ regs
   284 00006933 E3                  <1> 	db 	0E3h	; misc reg
   285 00006934 5F4F508254800B3E    <1> 	db	5Fh, 4Fh, 50h, 82h, 54h, 80h, 0Bh, 3Eh
   286                              <1> 	; 09/11/2020
   287                              <1> 	;db	5Fh, 4Fh, 50h, 82h, 53h, 9Fh, 0Bh, 3Eh
   288 0000693C 0040000000000000    <1> 	db	00h, 40h, 00h, 00h, 00h, 00h, 00h, 00h
   289 00006944 EA8CDF2800E704E3    <1>  	db	0EAh, 8Ch, 0DFh, 28h, 00h, 0E7h, 04h, 0E3h
   290                              <1> 	; 09/11/2020
   291                              <1>  	;db	0E9h, 8Bh, 0DFh, 28h, 00h, 0E7h, 04h, 0E3h
   292 0000694C FF                  <1> 	db	0FFh	; crtc regs
   293 0000694D 0001020304051407    <1> 	db	00h, 01h, 02h, 03h, 04h, 05h, 14h, 07h
   294 00006955 38393A3B3C3D3E3F    <1> 	db	38h, 39h, 3Ah, 3Bh, 3Ch, 3Dh, 3Eh, 3Fh
   295 0000695D 01000F00            <1> 	db	01h, 00h, 0Fh, 00h  ; actl regs
   296 00006961 000000000000050FFF  <1> 	db	00h, 00h, 00h, 00h, 00h, 00h, 05h, 0Fh, 0FFh ; grdc regs
   297                              <1> vga_mode_6Ah:  ; mode 6Ah, 800*600, 16 colors, planar
   298                              <1> 	; 11/11/2020
   299 0000696A 6424100000          <1>  	db 	100, 36, 16, 00h, 00h ; tw, th-1, ch, slength
   300 0000696F 010F0006            <1> 	db	01h, 0Fh, 00h, 06h ; sequ regs
   301 00006973 E3                  <1> 	db 	0E3h	; misc reg
   302 00006974 7F6363836B1B72F0    <1> 	db	7Fh, 63h, 63h, 83h, 6Bh, 1Bh, 72h, 0F0h
   303 0000697C 0060000000000000    <1> 	db	00h, 60h, 00h, 00h, 00h, 00h, 00h, 00h
   304 00006984 598D5732005773E3    <1>  	db	59h, 8Dh, 57h, 32h, 00h, 57h, 73h, 0E3h
   305 0000698C FF                  <1> 	db	0FFh	; crtc regs
   306 0000698D 0001020304051407    <1> 	db	00h, 01h, 02h, 03h, 04h, 05h, 14h, 07h
   307 00006995 38393A3B3C3D3E3F    <1> 	db	38h, 39h, 3Ah, 3Bh, 3Ch, 3Dh, 3Eh, 3Fh
   308 0000699D 01000F00            <1> 	db	01h, 00h, 0Fh, 00h  ; actl regs
   309 000069A1 000000000000050FFF  <1> 	db	00h, 00h, 00h, 00h, 00h, 00h, 05h, 0Fh, 0FFh ; grdc regs
   310                              <1> vga_mode_0Dh:  ; mode 0Dh, 320*200, 16 colors, planar
   311 000069AA 2818080020          <1>  	db 	40, 24, 8, 00h, 20h ; tw, th-1, ch, slength
   312 000069AF 090F0006            <1> 	db	09h, 0Fh, 00h, 06h ; sequ regs
   313 000069B3 63                  <1> 	db 	63h	; misc reg
   314 000069B4 2D2728902B80BF1F    <1> 	db	2Dh, 27h, 28h, 90h, 2Bh, 80h, 0BFh, 1Fh
   315 000069BC 00C0000000000000    <1> 	db	00h, 0C0h, 00h, 00h, 00h, 00h, 00h, 00h
   316 000069C4 9C8E8F140096B9E3    <1>  	db	9Ch, 8Eh, 8Fh, 14h, 00h, 96h, 0B9h, 0E3h
   317 000069CC FF                  <1> 	db	0FFh	; crtc regs
   318 000069CD 0001020304050607    <1> 	db	00h, 01h, 02h, 03h, 04h, 05h, 06h, 07h
   319 000069D5 1011121314151617    <1> 	db	10h, 11h, 12h, 13h, 14h, 15h, 16h, 17h
   320 000069DD 01000F00            <1> 	db	01h, 00h, 0Fh, 00h  ; actl regs
   321 000069E1 000000000000050FFF  <1> 	db	00h, 00h, 00h, 00h, 00h, 00h, 05h, 0Fh, 0FFh ; grdc regs
   322                              <1> vga_mode_0Eh:  ; mode 0Eh, 640*200, 16 colors, planar
   323 000069EA 5018080040          <1>  	db 	80, 24, 8, 00h, 40h ; tw, th-1, ch, slength
   324 000069EF 010F0006            <1> 	db	01h, 0Fh, 00h, 06h ; sequ regs
   325 000069F3 63                  <1> 	db 	63h	; misc reg
   326 000069F4 5F4F50825480BF1F    <1> 	db	5Fh, 4Fh, 50h, 82h, 54h, 80h, 0BFh, 1Fh
   327 000069FC 00C0000000000000    <1> 	db	00h, 0C0h, 00h, 00h, 00h, 00h, 00h, 00h
   328 00006A04 9C8E8F280096B9E3    <1>  	db	9Ch, 8Eh, 8Fh, 28h, 00h, 96h, 0B9h, 0E3h
   329 00006A0C FF                  <1> 	db	0FFh	; crtc regs
   330 00006A0D 0001020304050607    <1> 	db	00h, 01h, 02h, 03h, 04h, 05h, 06h, 07h
   331 00006A15 1011121314151617    <1> 	db	10h, 11h, 12h, 13h, 14h, 15h, 16h, 17h
   332 00006A1D 01000F00            <1> 	db	01h, 00h, 0Fh, 00h  ; actl regs
   333 00006A21 000000000000050FFF  <1> 	db	00h, 00h, 00h, 00h, 00h, 00h, 05h, 0Fh, 0FFh ; grdc regs
   334                              <1> vga_mode_10h: ; mode 10h, 640*350, 16 colors, planar
   335 00006A2A 50180E0080          <1>  	db 	80, 24, 14, 00h, 80h ; tw, th-1, ch, slength
   336 00006A2F 010F0006            <1> 	db	01h, 0Fh, 00h, 06h ; sequ regs
   337 00006A33 A3                  <1> 	db 	0A3h	; misc reg
   338 00006A34 5F4F50825480BF1F    <1> 	db	5Fh, 4Fh, 50h, 82h, 54h, 80h, 0BFh, 1Fh
   339 00006A3C 0040000000000000    <1> 	db	00h, 40h, 00h, 00h, 00h, 00h, 00h, 00h
   340 00006A44 83855D280F63BAE3    <1>  	db	83h, 85h, 5Dh, 28h, 0Fh, 63h, 0BAh, 0E3h
   341 00006A4C FF                  <1> 	db	0FFh	; crtc regs
   342 00006A4D 0001020304051407    <1> 	db	00h, 01h, 02h, 03h, 04h, 05h, 14h, 07h
   343 00006A55 38393A3B3C3D3E3F    <1> 	db	38h, 39h, 3Ah, 3Bh, 3Ch, 3Dh, 3Eh, 3Fh
   344 00006A5D 01000F00            <1> 	db	01h, 00h, 0Fh, 00h  ; actl regs
   345 00006A61 000000000000050FFF  <1> 	db	00h, 00h, 00h, 00h, 00h, 00h, 05h, 0Fh, 0FFh ; grdc regs
   346                              <1> vga_mode_11h: ; mode 11h, 640*480, mono color, planar
   347                              <1>  	; 11/11/2020
   348 00006A6A 501D1000A0          <1> 	db 	80, 29, 16, 00h, 0A0h ; tw, th-1, ch, slength
   349 00006A6F 010F0006            <1> 	db	01h, 0Fh, 00h, 06h ; sequ regs
   350 00006A73 E3                  <1> 	db 	0E3h	; misc reg
   351 00006A74 5F4F508254800B3E    <1> 	db	5Fh, 4Fh, 50h, 82h, 54h, 80h, 0Bh, 3Eh
   352 00006A7C 0040000000000000    <1> 	db	00h, 40h, 00h, 00h, 00h, 00h, 00h, 00h
   353 00006A84 EA8CDF2800E704C3    <1>  	db	0EAh, 8Ch, 0DFh, 28h, 00h, 0E7h, 04h, 0C3h ; 11/11/2020
   354 00006A8C FF                  <1> 	db	0FFh	; crtc regs
   355 00006A8D 003F003F003F003F    <1> 	db	00h, 3Fh, 00h, 3Fh, 00h, 3Fh, 00h, 3Fh
   356 00006A95 003F003F003F003F    <1> 	db	00h, 3Fh, 00h, 3Fh, 00h, 3Fh, 00h, 3Fh
   357 00006A9D 01000F00            <1> 	db	01h, 00h, 0Fh, 00h  ; actl regs
   358 00006AA1 000000000000050FFF  <1> 	db	00h, 00h, 00h, 00h, 00h, 00h, 05h, 0Fh, 0FFh ; grdc regs
   359                              <1> end_of_vga_params:
   360                              <1> 
   361                              <1> ; /// End Of VIDEO DATA ///
   362                              <1> 
   363                              <1> ; 23/11/2020
   364                              <1> ; VBE 2 BOCHS/QEMU emulator extensions 
   365                              <1> ;	for TRDOS 386 v2 kernel (video bios)  
   366                              <1> 
   367                              <1> ; vbetables.h by Volker Rupper (02/01/2020)
   368                              <1> 
   369                              <1> b_vbe_modes:
   370                              <1> 	;/* standard VESA modes */	
   371 00006AAA 0001800290010800    <1> 	dw 100h,  640, 400,  8
   372 00006AB2 01018002E0010800    <1> 	dw 101h,  640, 480,  8
   373 00006ABA 0301200358020800    <1> 	dw 103h,  800, 600,  8
   374 00006AC2 0501000400030800    <1> 	dw 105h, 1024, 768,  8
   375 00006ACA 0E014001C8001000    <1> 	dw 10Eh,  320, 200, 16
   376 00006AD2 0F014001C8001800    <1> 	dw 10Fh,  320, 200, 24
   377 00006ADA 11018002E0011000    <1> 	dw 111h,  640, 480, 16
   378 00006AE2 12018002E0011800    <1> 	dw 112h,  640, 480, 24
   379 00006AEA 1401200358021000    <1> 	dw 114h,  800, 600, 16
   380 00006AF2 1501200358021800    <1> 	dw 115h,  800, 600, 24
   381 00006AFA 1701000400031000    <1> 	dw 117h, 1024, 768, 16
   382 00006B02 1801000400031800    <1> 	dw 118h, 1024, 768, 24
   383                              <1> 
   384                              <1> ;/* BOCHS/PLEX86 'own' mode numbers */
   385 00006B0A 40014001C8002000    <1> 	dw 140h,  320,  200, 32
   386 00006B12 4101800290012000    <1> 	dw 141h,  640,  400, 32
   387 00006B1A 42018002E0012000    <1> 	dw 142h,  640,  480, 32
   388 00006B22 4301200358022000    <1> 	dw 143h,  800,  600, 32
   389 00006B2A 4401000400032000    <1> 	dw 144h, 1024,  768, 32
   390 00006B32 46014001C8000800    <1> 	dw 146h,  320,  200,  8
   391 00006B3A 8D010005D0021000    <1> 	dw 18Dh, 1280,  720, 16
   392 00006B42 8E010005D0021800    <1> 	dw 18Eh, 1280,  720, 24
   393 00006B4A 8F010005D0022000    <1> 	dw 18Fh, 1280,  720, 32
   394 00006B52 9001800738041000    <1> 	dw 190h, 1920, 1080, 16
   395 00006B5A 9101800738041800    <1> 	dw 191h, 1920, 1080, 24
   396 00006B62 9201800738042000    <1> 	dw 192h, 1920, 1080, 32
   397                              <1> 
   398                              <1> end_of_b_vbe_modes:
   399                              <1> 
   400                              <1> MA1 equ VBE_MODE_ATTRIBUTE_SUPPORTED
   401                              <1> MA2 equ VBE_MODE_ATTRIBUTE_EXTENDED_INFO_AVAILABLE
   402                              <1> MA3 equ VBE_MODE_ATTRIBUTE_COLOR_MODE
   403                              <1> MA4 equ VBE_MODE_ATTRIBUTE_LINEAR_FRAME_BUFFER_MODE
   404                              <1> MA5 equ	VBE_MODE_ATTRIBUTE_GRAPHICS_MODE
   405                              <1> 
   406                              <1> MODE_ATTRIBUTES equ MA1|MA2|MA3|MA4|MA5
   407                              <1> 
   408                              <1> WA1 equ VBE_WINDOW_ATTRIBUTE_RELOCATABLE
   409                              <1> WA2 equ	VBE_WINDOW_ATTRIBUTE_READABLE
   410                              <1> WA3 equ VBE_WINDOW_ATTRIBUTE_WRITEABLE
   411                              <1> 
   412                              <1> WINA_ATTRIBUTES equ WA1|WA2|WA3
   413                              <1> 
   414                              <1> ; 24/11/2020
   415                              <1> 
   416                              <1> %if 0
   417                              <1> 
   418                              <1> MODE_INFO_LIST: 
   419                              <1> 
   420                              <1> ; 24/11/2020
   421                              <1> ; '%if 0' disables 24 mode info tables here, until %endif 
   422                              <1> ; ('set_mode_info_list' will set only 1 list for selected mode)
   423                              <1> ; (Purpose: To save about 1 KB kernel size by removing fixed data)
   424                              <1> 
   425                              <1> 			dw	0100h ; 640x400x8 
   426                              <1> ModeAttributes1: 	dw	MODE_ATTRIBUTES
   427                              <1> WinAAttributes1: 	db	WINA_ATTRIBUTES
   428                              <1> WinBAttributes1: 	db	0
   429                              <1> WinGranularity1: 	dw	VBE_DISPI_BANK_SIZE_KB
   430                              <1> WinSize1: 		dw	VBE_DISPI_BANK_SIZE_KB
   431                              <1> WinASegment1:		dw	VGAMEM_GRAPH
   432                              <1> WinBSegment1:		dw	0000h
   433                              <1> WinFuncPtr1:		dd	0
   434                              <1> BytesPerScanLine1: 	dw	640
   435                              <1> XResolution1:		dw	640
   436                              <1> YResolution1:		dw	400
   437                              <1> XCharSize1:		db	8
   438                              <1> YCharSize1:		db	16
   439                              <1> NumberOfPlanes1: 	db	1
   440                              <1> BitsPerPixel1:		db	8
   441                              <1> NumberOfBanks1:		db	4
   442                              <1> MemoryModel1:		db	VBE_MEMORYMODEL_PACKED_PIXEL
   443                              <1> BankSize1:		db	0
   444                              <1> NumberOfImagePages1: 	db	64
   445                              <1> Reserved_page1:		db	0
   446                              <1> RedMaskSize1:		db	0
   447                              <1> RedFieldPosition1: 	db	0
   448                              <1> GreenMaskSize1:		db	0
   449                              <1> GreenFieldPosition1: 	db	0
   450                              <1> BlueMaskSize1:		db	0
   451                              <1> BlueFieldPosition1: 	db	0
   452                              <1> RsvdMaskSize1: 		db	0
   453                              <1> RsvdFieldPosition1: 	db	0
   454                              <1> DirectColorModeInfo1: 	db	0
   455                              <1> PhysBasePtr1:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
   456                              <1> OffScreenMemOffset1: 	dd	0
   457                              <1> OffScreenMemSize1: 	dw	0
   458                              <1> LinBytesPerScanLine1: 	dw	640
   459                              <1> BnkNumberOfPages1: 	db	0
   460                              <1> LinNumberOfPages1: 	db	0
   461                              <1> LinRedMaskSize1:	db	0
   462                              <1> LinRedFieldPosition1: 	db	0
   463                              <1> LinGreenMaskSize1: 	db	0
   464                              <1> LinGreenFieldPosition1: db	0
   465                              <1> LinBlueMaskSize1: 	db	0
   466                              <1> LinBlueFieldPosition1: 	db	0
   467                              <1> LinRsvdMaskSize1: 	db	0
   468                              <1> LinRsvdFieldPosition1: 	db	0
   469                              <1> MaxPixelClock1:		dd	0
   470                              <1> 
   471                              <1> 			dw	0101h ; 640x480x8
   472                              <1> ModeAttributes2: 	dw	MODE_ATTRIBUTES
   473                              <1> WinAAttributes2: 	db	WINA_ATTRIBUTES
   474                              <1> WinBAttributes2: 	db	0
   475                              <1> WinGranularity2: 	dw	VBE_DISPI_BANK_SIZE_KB
   476                              <1> WinSize2: 		dw	VBE_DISPI_BANK_SIZE_KB
   477                              <1> WinASegment2:		dw	VGAMEM_GRAPH
   478                              <1> WinBSegment2:		dw	0000h
   479                              <1> WinFuncPtr2:		dd	0
   480                              <1> BytesPerScanLine2:	dw	640
   481                              <1> XResolution2:		dw	640
   482                              <1> YResolution2:		dw	480
   483                              <1> XCharSize2:		db	8
   484                              <1> YCharSize2:		db	16
   485                              <1> NumberOfPlanes2:	db	1
   486                              <1> BitsPerPixel2:		db	8
   487                              <1> NumberOfBanks2:		db	5
   488                              <1> MemoryModel2:		db	VBE_MEMORYMODEL_PACKED_PIXEL
   489                              <1> BankSize2:		db	0
   490                              <1> NumberOfImagePages2:	db	53
   491                              <1> Reserved_page2:		db	0
   492                              <1> RedMaskSize2:		db	0
   493                              <1> RedFieldPosition2:	db	0
   494                              <1> GreenMaskSize2:		db	0
   495                              <1> GreenFieldPosition2:	db	0
   496                              <1> BlueMaskSize2:		db	0
   497                              <1> BlueFieldPosition2:	db	0
   498                              <1> RsvdMaskSize2:		db	0
   499                              <1> RsvdFieldPosition2:	db	0
   500                              <1> DirectColorModeInfo2:	db	0
   501                              <1> PhysBasePtr2:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
   502                              <1> OffScreenMemOffset2:	dd	0
   503                              <1> OffScreenMemSize2:	dw	0
   504                              <1> LinBytesPerScanLine2:	dw	640
   505                              <1> BnkNumberOfPages2: 	db	0
   506                              <1> LinNumberOfPages2: 	db	0
   507                              <1> LinRedMaskSize2:	db	0
   508                              <1> LinRedFieldPosition2: 	db	0
   509                              <1> LinGreenMaskSize2: 	db	0
   510                              <1> LinGreenFieldPosition2: db	0
   511                              <1> LinBlueMaskSize2: 	db	0
   512                              <1> LinBlueFieldPosition2: 	db	0
   513                              <1> LinRsvdMaskSize2: 	db	0
   514                              <1> LinRsvdFieldPosition2: 	db	0
   515                              <1> MaxPixelClock2:		dd	0
   516                              <1> 			
   517                              <1> 			dw	0103h ; 800x600x8
   518                              <1> ModeAttributes3: 	dw	MODE_ATTRIBUTES
   519                              <1> WinAAttributes3: 	db	WINA_ATTRIBUTES
   520                              <1> WinBAttributes3: 	db	0
   521                              <1> WinGranularity3: 	dw	VBE_DISPI_BANK_SIZE_KB
   522                              <1> WinSize3: 		dw	VBE_DISPI_BANK_SIZE_KB
   523                              <1> WinASegment3:		dw	VGAMEM_GRAPH
   524                              <1> WinBSegment3:		dw	0000h
   525                              <1> WinFuncPtr3:		dd	0
   526                              <1> BytesPerScanLine3:	dw	800
   527                              <1> XResolution3:		dw	800
   528                              <1> YResolution3:		dw	600
   529                              <1> XCharSize3:		db	8
   530                              <1> YCharSize3:		db	16
   531                              <1> NumberOfPlanes3:	db	1
   532                              <1> BitsPerPixel3:		db	8
   533                              <1> NumberOfBanks3:		db	8
   534                              <1> MemoryModel3:		db	VBE_MEMORYMODEL_PACKED_PIXEL
   535                              <1> BankSize3:		db	0
   536                              <1> NumberOfImagePages3:	db	33
   537                              <1> Reserved_page3:		db	0
   538                              <1> RedMaskSize3:		db	0
   539                              <1> RedFieldPosition3:	db	0
   540                              <1> GreenMaskSize3:		db	0
   541                              <1> GreenFieldPosition3:	db	0
   542                              <1> BlueMaskSize3:		db	0
   543                              <1> BlueFieldPosition3:	db	0
   544                              <1> RsvdMaskSize3:		db	0
   545                              <1> RsvdFieldPosition3:	db	0
   546                              <1> DirectColorModeInfo3:	db	0
   547                              <1> PhysBasePtr3:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
   548                              <1> OffScreenMemOffset3:	dd	0
   549                              <1> OffScreenMemSize3:	dw	0
   550                              <1> LinBytesPerScanLine3:	dw	800
   551                              <1> BnkNumberOfPages3: 	db	0
   552                              <1> LinNumberOfPages3: 	db	0
   553                              <1> LinRedMaskSize3:	db	0
   554                              <1> LinRedFieldPosition3: 	db	0
   555                              <1> LinGreenMaskSize3: 	db	0
   556                              <1> LinGreenFieldPosition: 	db	0
   557                              <1> LinBlueMaskSize: 	db	0
   558                              <1> LinBlueFieldPosition: 	db	0
   559                              <1> LinRsvdMaskSize: 	db	0
   560                              <1> LinRsvdFieldPosition: 	db	0
   561                              <1> MaxPixelClock:		dd	0
   562                              <1> 			
   563                              <1> 			dw	0105h ; 1024x768x8
   564                              <1> ModeAttributes4: 	dw	MODE_ATTRIBUTES
   565                              <1> WinAAttributes4: 	db	WINA_ATTRIBUTES
   566                              <1> WinBAttributes4: 	db	0
   567                              <1> WinGranularity4: 	dw	VBE_DISPI_BANK_SIZE_KB
   568                              <1> WinSize4: 		dw	VBE_DISPI_BANK_SIZE_KB
   569                              <1> WinASegment4:		dw	VGAMEM_GRAPH
   570                              <1> WinBSegment4:		dw	0000h
   571                              <1> WinFuncPtr4:		dd	0
   572                              <1> BytesPerScanLine4:	dw	1024
   573                              <1> XResolution4:		dw	1024
   574                              <1> YResolution4:		dw	768
   575                              <1> XCharSize4:		db	8
   576                              <1> YCharSize4:		db	16
   577                              <1> NumberOfPlanes4:	db	1
   578                              <1> BitsPerPixel4:		db	8
   579                              <1> NumberOfBanks4:		db	12
   580                              <1> MemoryModel4:		db	VBE_MEMORYMODEL_PACKED_PIXEL
   581                              <1> BankSize4:		db	0
   582                              <1> NumberOfImagePages4:	db	20
   583                              <1> Reserved_page4:		db	0
   584                              <1> RedMaskSize4:		db	0
   585                              <1> RedFieldPosition4:	db	0
   586                              <1> GreenMaskSize4:		db	0
   587                              <1> GreenFieldPosition4:	db	0
   588                              <1> BlueMaskSize4:		db	0
   589                              <1> BlueFieldPosition4:	db	0
   590                              <1> RsvdMaskSize4:		db	0
   591                              <1> RsvdFieldPosition4:	db	0
   592                              <1> DirectColorModeInfo4:	db	0
   593                              <1> PhysBasePtr4:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
   594                              <1> OffScreenMemOffset4:	dd	0
   595                              <1> OffScreenMemSize4:	dw	0
   596                              <1> LinBytesPerScanLine4:	dw	1024
   597                              <1> BnkNumberOfPages4: 	db	0
   598                              <1> LinNumberOfPages4: 	db	0
   599                              <1> LinRedMaskSize4:	db	0
   600                              <1> LinRedFieldPosition4: 	db	0
   601                              <1> LinGreenMaskSize4: 	db	0
   602                              <1> LinGreenFieldPosition4: db	0
   603                              <1> LinBlueMaskSize4: 	db	0
   604                              <1> LinBlueFieldPosition4: 	db	0
   605                              <1> LinRsvdMaskSize4: 	db	0
   606                              <1> LinRsvdFieldPosition4: 	db	0
   607                              <1> MaxPixelClock4:		dd	0
   608                              <1> 
   609                              <1> 			dw	010Eh ; 320x200x16
   610                              <1> ModeAttributes5: 	dw	MODE_ATTRIBUTES
   611                              <1> WinAAttributes5: 	db	WINA_ATTRIBUTES
   612                              <1> WinBAttributes5: 	db	0
   613                              <1> WinGranularity5: 	dw	VBE_DISPI_BANK_SIZE_KB
   614                              <1> WinSize5: 		dw	VBE_DISPI_BANK_SIZE_KB
   615                              <1> WinASegment5:		dw	VGAMEM_GRAPH
   616                              <1> WinBSegment5:		dw	0000h
   617                              <1> WinFuncPtr5:		dd	0
   618                              <1> BytesPerScanLine5:	dw	640
   619                              <1> XResolution5:		dw	320
   620                              <1> YResolution5:		dw	200
   621                              <1> XCharSize5:		db	8
   622                              <1> YCharSize5:		db	16
   623                              <1> NumberOfPlanes5:	db	1
   624                              <1> BitsPerPixel5:		db	16
   625                              <1> NumberOfBanks5:		db	2
   626                              <1> MemoryModel5:		db	VBE_MEMORYMODEL_DIRECT_COLOR
   627                              <1> BankSize5:		db	0
   628                              <1> NumberOfImagePages5:	db	130
   629                              <1> Reserved_page5:		db	0
   630                              <1> RedMaskSize5:		db	5
   631                              <1> RedFieldPosition5:	db	11
   632                              <1> GreenMaskSize5:		db	6
   633                              <1> GreenFieldPosition5:	db	5
   634                              <1> BlueMaskSize5:		db	5
   635                              <1> BlueFieldPosition5:	db	0
   636                              <1> RsvdMaskSize5:		db	0
   637                              <1> RsvdFieldPosition5:	db	0
   638                              <1> DirectColorModeInfo5:	db	0
   639                              <1> PhysBasePtr5:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
   640                              <1> OffScreenMemOffset5:	dd	0
   641                              <1> OffScreenMemSize5:	dw	0
   642                              <1> LinBytesPerScanLine5:	dw	640
   643                              <1> BnkNumberOfPages5: 	db	0
   644                              <1> LinNumberOfPages5: 	db	0
   645                              <1> LinRedMaskSize5:	db	5
   646                              <1> LinRedFieldPosition5:	db	11
   647                              <1> LinGreenMaskSize5:	db	6
   648                              <1> LinGreenFieldPosition5:	db	5
   649                              <1> LinBlueMaskSize5:	db	5
   650                              <1> LinBlueFieldPosition5:	db	0
   651                              <1> LinRsvdMaskSize5:	db	0
   652                              <1> LinRsvdFieldPosition5:	db	0
   653                              <1> MaxPixelClock5:		dd	0
   654                              <1> 	
   655                              <1> 			dw	010Fh ; 320x200x24
   656                              <1> ModeAttributes6: 	dw	MODE_ATTRIBUTES
   657                              <1> WinAAttributes6: 	db	WINA_ATTRIBUTES
   658                              <1> WinBAttributes6: 	db	0
   659                              <1> WinGranularity6: 	dw	VBE_DISPI_BANK_SIZE_KB
   660                              <1> WinSize6: 		dw	VBE_DISPI_BANK_SIZE_KB
   661                              <1> WinASegment6:		dw	VGAMEM_GRAPH
   662                              <1> WinBSegment6:		dw	0000h
   663                              <1> WinFuncPtr6:		dd	0
   664                              <1> BytesPerScanLine6:	dw	960
   665                              <1> XResolution6:		dw	320
   666                              <1> YResolution6:		dw	200
   667                              <1> XCharSize6:		db	8
   668                              <1> YCharSize6:		db	16
   669                              <1> NumberOfPlanes6:	db	1
   670                              <1> BitsPerPixel6:		db	24
   671                              <1> NumberOfBanks6:		db	3
   672                              <1> MemoryModel6:		db	VBE_MEMORYMODEL_DIRECT_COLOR
   673                              <1> BankSize6:		db	0
   674                              <1> NumberOfImagePages6:	db	86
   675                              <1> Reserved_page6:		db	0
   676                              <1> RedMaskSize6:		db	8
   677                              <1> RedFieldPosition6:	db	16
   678                              <1> GreenMaskSize6:		db	8
   679                              <1> GreenFieldPosition6:	db	8
   680                              <1> BlueMaskSize6:		db	8
   681                              <1> BlueFieldPosition6:	db	0
   682                              <1> RsvdMaskSize6:		db	0
   683                              <1> RsvdFieldPosition6:	db	0
   684                              <1> DirectColorModeInfo6:	db	0
   685                              <1> PhysBasePtr6:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
   686                              <1> OffScreenMemOffset6:	dd	0
   687                              <1> OffScreenMemSize6:	dw	0
   688                              <1> LinBytesPerScanLine6:	dw	960
   689                              <1> BnkNumberOfPages6: 	db	0
   690                              <1> LinNumberOfPages6: 	db	0
   691                              <1> LinRedMaskSize6:	db	8
   692                              <1> LinRedFieldPosition6:	db	16
   693                              <1> LinGreenMaskSize6:	db	8
   694                              <1> LinGreenFieldPosition6:	db	8
   695                              <1> LinBlueMaskSize6:	db	8
   696                              <1> LinBlueFieldPosition6:	db	0
   697                              <1> LinRsvdMaskSize6:	db	0
   698                              <1> LinRsvdFieldPosition6:	db	0
   699                              <1> MaxPixelClock6:		dd	0
   700                              <1> 	
   701                              <1> 			dw	0111h ; 640x480x16
   702                              <1> ModeAttributes7: 	dw	MODE_ATTRIBUTES
   703                              <1> WinAAttributes7: 	db	WINA_ATTRIBUTES
   704                              <1> WinBAttributes7: 	db	0
   705                              <1> WinGranularity7: 	dw	VBE_DISPI_BANK_SIZE_KB
   706                              <1> WinSize7: 		dw	VBE_DISPI_BANK_SIZE_KB
   707                              <1> WinASegment7:		dw	VGAMEM_GRAPH
   708                              <1> WinBSegment7:		dw	0000h
   709                              <1> WinFuncPtr7:		dd	0
   710                              <1> BytesPerScanLine7:	dw	1280
   711                              <1> XResolution7:		dw	640
   712                              <1> YResolution7:		dw	480
   713                              <1> XCharSize7:		db	8
   714                              <1> YCharSize7:		db	16
   715                              <1> NumberOfPlanes7:	db	1
   716                              <1> BitsPerPixel7:		db	16
   717                              <1> NumberOfBanks7:		db	10
   718                              <1> MemoryModel7:		db	VBE_MEMORYMODEL_DIRECT_COLOR
   719                              <1> BankSize7:		db	0
   720                              <1> NumberOfImagePages7:	db	26
   721                              <1> Reserved_page7:		db	0
   722                              <1> RedMaskSize7:		db	5
   723                              <1> RedFieldPosition7:	db	11
   724                              <1> GreenMaskSize7:		db	6
   725                              <1> GreenFieldPosition7:	db	5
   726                              <1> BlueMaskSize7:		db	5
   727                              <1> BlueFieldPosition7:	db	0
   728                              <1> RsvdMaskSize7:		db	0
   729                              <1> RsvdFieldPosition7:	db	0
   730                              <1> DirectColorModeInfo7:	db	0
   731                              <1> PhysBasePtr7:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS,
   732                              <1> OffScreenMemOffset7:	dd	0
   733                              <1> OffScreenMemSize7:	dw	0
   734                              <1> LinBytesPerScanLine7:	dw	1280
   735                              <1> BnkNumberOfPages7: 	db	0
   736                              <1> LinNumberOfPages7: 	db	0
   737                              <1> LinRedMaskSize7:	db	5
   738                              <1> LinRedFieldPosition7:	db	11
   739                              <1> LinGreenMaskSize7:	db	6
   740                              <1> LinGreenFieldPosition7:	db	5
   741                              <1> LinBlueMaskSize7:	db	5
   742                              <1> LinBlueFieldPosition7:	db	0
   743                              <1> LinRsvdMaskSize7:	db	0
   744                              <1> LinRsvdFieldPosition7:	db	0
   745                              <1> MaxPixelClock7:		dd	0
   746                              <1> 
   747                              <1> 			dw	0112h ; 640x480x24
   748                              <1> ModeAttributes8: 	dw	MODE_ATTRIBUTES
   749                              <1> WinAAttributes8: 	db	WINA_ATTRIBUTES
   750                              <1> WinBAttributes8: 	db	0
   751                              <1> WinGranularity8: 	dw	VBE_DISPI_BANK_SIZE_KB
   752                              <1> WinSize8: 		dw	VBE_DISPI_BANK_SIZE_KB
   753                              <1> WinASegment8:		dw	VGAMEM_GRAPH
   754                              <1> WinBSegment8:		dw	0000h
   755                              <1> WinFuncPtr8:		dd	0
   756                              <1> BytesPerScanLine8:	dw	1920
   757                              <1> XResolution8:		dw	640
   758                              <1> YResolution8:		dw	480
   759                              <1> XCharSize8:		db	8
   760                              <1> YCharSize8:		db	16
   761                              <1> NumberOfPlanes8:	db	1
   762                              <1> BitsPerPixel8:		db	24
   763                              <1> NumberOfBanks8:		db	15
   764                              <1> MemoryModel8:		db	VBE_MEMORYMODEL_DIRECT_COLOR
   765                              <1> BankSize8:		db	0
   766                              <1> NumberOfImagePages8:	db	17
   767                              <1> Reserved_page8:		db	0
   768                              <1> RedMaskSize8:		db	8
   769                              <1> RedFieldPosition8:	db	16
   770                              <1> GreenMaskSize8:		db	8
   771                              <1> GreenFieldPosition8:	db	8
   772                              <1> BlueMaskSize8:		db	8
   773                              <1> BlueFieldPosition8:	db	0
   774                              <1> RsvdMaskSize8:		db	0
   775                              <1> RsvdFieldPosition8:	db	0
   776                              <1> DirectColorModeInfo8:	db	0
   777                              <1> PhysBasePtr8:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
   778                              <1> OffScreenMemOffset8:	dd	0
   779                              <1> OffScreenMemSize8:	dw	0
   780                              <1> LinBytesPerScanLine8:	dw	1920
   781                              <1> BnkNumberOfPages8: 	db	0
   782                              <1> LinNumberOfPages8: 	db	0
   783                              <1> LinRedMaskSize8:	db	8
   784                              <1> LinRedFieldPosition8:	db	16
   785                              <1> LinGreenMaskSize8:	db	8
   786                              <1> LinGreenFieldPosition8:	db	8
   787                              <1> LinBlueMaskSize8:	db	8
   788                              <1> LinBlueFieldPosition8:	db	0
   789                              <1> LinRsvdMaskSize8:	db	0
   790                              <1> LinRsvdFieldPosition8:	db	0
   791                              <1> MaxPixelClock8:		dd	0
   792                              <1> 
   793                              <1> 			dw	0114h ; 800x600x16
   794                              <1> ModeAttributes9: 	dw	MODE_ATTRIBUTES
   795                              <1> WinAAttributes9: 	db	WINA_ATTRIBUTES
   796                              <1> WinBAttributes9: 	db	0
   797                              <1> WinGranularity9: 	dw	VBE_DISPI_BANK_SIZE_KB
   798                              <1> WinSize9: 		dw	VBE_DISPI_BANK_SIZE_KB
   799                              <1> WinASegment9:		dw	VGAMEM_GRAPH
   800                              <1> WinBSegment9:		dw	0000h
   801                              <1> WinFuncPtr9:		dd	0
   802                              <1> BytesPerScanLine9:	dw	1600
   803                              <1> XResolution9:		dw	800
   804                              <1> YResolution9:		dw	600
   805                              <1> XCharSize9:		db	8
   806                              <1> YCharSize9:		db	16
   807                              <1> NumberOfPlanes9:	db	1
   808                              <1> BitsPerPixel9:		db	16
   809                              <1> NumberOfBanks9:		db	15
   810                              <1> MemoryModel9:		db	VBE_MEMORYMODEL_DIRECT_COLOR
   811                              <1> BankSize9:		db	0
   812                              <1> NumberOfImagePages9:	db	16
   813                              <1> Reserved_page9:		db	0
   814                              <1> RedMaskSize9:		db	5
   815                              <1> RedFieldPosition9:	db	11
   816                              <1> GreenMaskSize9:		db	6
   817                              <1> GreenFieldPosition9:	db	5
   818                              <1> BlueMaskSize9:		db	5
   819                              <1> BlueFieldPosition9:	db	0
   820                              <1> RsvdMaskSize9:		db	0
   821                              <1> RsvdFieldPosition9:	db	0
   822                              <1> DirectColorModeInfo9:	db	0
   823                              <1> PhysBasePtr9:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
   824                              <1> OffScreenMemOffset9:	dd	0
   825                              <1> OffScreenMemSize9:	dw	0
   826                              <1> LinBytesPerScanLine9:	dw	1600
   827                              <1> BnkNumberOfPages9: 	db	0
   828                              <1> LinNumberOfPages9: 	db	0
   829                              <1> LinRedMaskSize9:	db	5
   830                              <1> LinRedFieldPosition9:	db	11
   831                              <1> LinGreenMaskSize9:	db	6
   832                              <1> LinGreenFieldPosition9:	db	5
   833                              <1> LinBlueMaskSize9:	db	5
   834                              <1> LinBlueFieldPosition9:	db	0
   835                              <1> LinRsvdMaskSize9:	db	0
   836                              <1> LinRsvdFieldPosition9:	db	0
   837                              <1> MaxPixelClock9:		dd	0
   838                              <1> 	
   839                              <1> 			dw	0115h ; 800x600x24
   840                              <1> ModeAttributes10: 	dw	MODE_ATTRIBUTES
   841                              <1> WinAAttributes10: 	db	WINA_ATTRIBUTES
   842                              <1> WinBAttributes10: 	db	0
   843                              <1> WinGranularity10: 	dw	VBE_DISPI_BANK_SIZE_KB
   844                              <1> WinSize10: 		dw	VBE_DISPI_BANK_SIZE_KB
   845                              <1> WinASegment10:		dw	VGAMEM_GRAPH
   846                              <1> WinBSegment10:		dw	0000h
   847                              <1> WinFuncPtr10:		dd	0
   848                              <1> BytesPerScanLine10:	dw	2400
   849                              <1> XResolution10:		dw	800
   850                              <1> YResolution10:		dw	600
   851                              <1> XCharSize10:		db	8
   852                              <1> YCharSize10:		db	16
   853                              <1> NumberOfPlanes10:	db	1
   854                              <1> BitsPerPixel10:		db	24
   855                              <1> NumberOfBanks10:	db	22
   856                              <1> MemoryModel10:		db	VBE_MEMORYMODEL_DIRECT_COLOR
   857                              <1> BankSize10:		db	0
   858                              <1> NumberOfImagePages10:	db	10
   859                              <1> Reserved_page10:	db	0
   860                              <1> RedMaskSize10:		db	8
   861                              <1> RedFieldPosition10:	db	16
   862                              <1> GreenMaskSize10:	db	8
   863                              <1> GreenFieldPosition10:	db	8
   864                              <1> BlueMaskSize10:		db	8
   865                              <1> BlueFieldPosition10:	db	0
   866                              <1> RsvdMaskSize10:		db	0
   867                              <1> RsvdFieldPosition10:	db	0
   868                              <1> DirectColorModeInfo10:	db	0
   869                              <1> PhysBasePtr10:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
   870                              <1> OffScreenMemOffset10:	dd	0
   871                              <1> OffScreenMemSize10:	dw	0
   872                              <1> LinBytesPerScanLine10:	dw	2400
   873                              <1> BnkNumberOfPages10: 	db	0
   874                              <1> LinNumberOfPages10: 	db	0
   875                              <1> LinRedMaskSize10:	db	8
   876                              <1> LinRedFieldPosition10:	db	16
   877                              <1> LinGreenMaskSize10:	db	8
   878                              <1> LinGreenFieldPosition10:db	8
   879                              <1> LinBlueMaskSize10:	db	8
   880                              <1> LinBlueFieldPosition10:	db	0
   881                              <1> LinRsvdMaskSize10:	db	0
   882                              <1> LinRsvdFieldPosition10:	db	0
   883                              <1> MaxPixelClock10:	dd	0
   884                              <1> 
   885                              <1> 			dw	0117h ; 1024x768x16
   886                              <1> ModeAttributes11: 	dw	MODE_ATTRIBUTES
   887                              <1> WinAAttributes11: 	db	WINA_ATTRIBUTES
   888                              <1> WinBAttributes11: 	db	0
   889                              <1> WinGranularity11: 	dw	VBE_DISPI_BANK_SIZE_KB
   890                              <1> WinSize11: 		dw	VBE_DISPI_BANK_SIZE_KB
   891                              <1> WinASegment11:		dw	VGAMEM_GRAPH
   892                              <1> WinBSegment11:		dw	0000h
   893                              <1> WinFuncPtr11:		dd	0
   894                              <1> BytesPerScanLine11:	dw	2048
   895                              <1> XResolution11:		dw	1024
   896                              <1> YResolution11:		dw	768
   897                              <1> XCharSize11:		db	8
   898                              <1> YCharSize11:		db	16
   899                              <1> NumberOfPlanes11:	db	1
   900                              <1> BitsPerPixel11:		db	16
   901                              <1> NumberOfBanks11:	db	24
   902                              <1> MemoryModel11:		db	VBE_MEMORYMODEL_DIRECT_COLOR
   903                              <1> BankSize11:		db	0
   904                              <1> NumberOfImagePages11:	db	9
   905                              <1> Reserved_page11:	db	0
   906                              <1> RedMaskSize11:		db	5
   907                              <1> RedFieldPosition11:	db	11
   908                              <1> GreenMaskSize11:	db	6
   909                              <1> GreenFieldPosition11:	db	5
   910                              <1> BlueMaskSize11:		db	5
   911                              <1> BlueFieldPosition11:	db	0
   912                              <1> RsvdMaskSize11:		db	0
   913                              <1> RsvdFieldPosition11:	db	0
   914                              <1> DirectColorModeInfo11:	db	0
   915                              <1> PhysBasePtr11:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS,
   916                              <1> OffScreenMemOffset11:	dd	0
   917                              <1> OffScreenMemSize11:	dw	0
   918                              <1> LinBytesPerScanLine11:	dw	2048
   919                              <1> BnkNumberOfPages11: 	db	0
   920                              <1> LinNumberOfPages11: 	db	0
   921                              <1> LinRedMaskSize11:	db	5
   922                              <1> LinRedFieldPosition11:	db	11
   923                              <1> LinGreenMaskSize11:	db	6
   924                              <1> LinGreenFieldPosition11:db	5
   925                              <1> LinBlueMaskSize11:	db	5
   926                              <1> LinBlueFieldPosition11:	db	0
   927                              <1> LinRsvdMaskSize11:	db	0
   928                              <1> LinRsvdFieldPosition11:	db	0
   929                              <1> MaxPixelClock11:	dd	0
   930                              <1> 
   931                              <1> 			dw	0118h ; 1024x768x24
   932                              <1> ModeAttributes12: 	dw	MODE_ATTRIBUTES
   933                              <1> WinAAttributes12: 	db	WINA_ATTRIBUTES
   934                              <1> WinBAttributes12: 	db	0
   935                              <1> WinGranularity12: 	dw	VBE_DISPI_BANK_SIZE_KB
   936                              <1> WinSize12: 		dw	VBE_DISPI_BANK_SIZE_KB
   937                              <1> WinASegment12:		dw	VGAMEM_GRAPH
   938                              <1> WinBSegment12:		dw	0000h
   939                              <1> WinFuncPtr12:		dd	0
   940                              <1> BytesPerScanLine12:	dw	3072
   941                              <1> XResolution12:		dw	1024
   942                              <1> YResolution12:		dw	768
   943                              <1> XCharSize12:		db	8
   944                              <1> YCharSize12:		db	16
   945                              <1> NumberOfPlanes12:	db	1
   946                              <1> BitsPerPixel12:		db	24
   947                              <1> NumberOfBanks12:	db	36
   948                              <1> MemoryModel12:		db	VBE_MEMORYMODEL_DIRECT_COLOR
   949                              <1> BankSize12:		db	0
   950                              <1> NumberOfImagePages12:	db	6
   951                              <1> Reserved_page12:	db	0
   952                              <1> RedMaskSize12:		db	8
   953                              <1> RedFieldPosition12:	db	16
   954                              <1> GreenMaskSize12:	db	8
   955                              <1> GreenFieldPosition12:	db	8
   956                              <1> BlueMaskSize12:		db	8
   957                              <1> BlueFieldPosition12:	db	0
   958                              <1> RsvdMaskSize12:		db	0
   959                              <1> RsvdFieldPosition12:	db	0
   960                              <1> DirectColorModeInfo12:	db	0
   961                              <1> PhysBasePtr12:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
   962                              <1> OffScreenMemOffset12:	dd	0
   963                              <1> OffScreenMemSize12:	dw	0
   964                              <1> LinBytesPerScanLine12:	dw	3072
   965                              <1> BnkNumberOfPages12: 	db	0
   966                              <1> LinNumberOfPages12: 	db	0
   967                              <1> LinRedMaskSize12:	db	8
   968                              <1> LinRedFieldPosition12:	db	16
   969                              <1> LinGreenMaskSize12:	db	8
   970                              <1> LinGreenFieldPosition12:db	8
   971                              <1> LinBlueMaskSize12:	db	8
   972                              <1> LinBlueFieldPosition12:	db	0
   973                              <1> LinRsvdMaskSize12:	db	0
   974                              <1> LinRsvdFieldPosition12:	db	0
   975                              <1> MaxPixelClock12:	dd	0
   976                              <1> 
   977                              <1> 			dw	0140h ; 320x200x32
   978                              <1> ModeAttributes13: 	dw	MODE_ATTRIBUTES
   979                              <1> WinAAttributes13: 	db	WINA_ATTRIBUTES
   980                              <1> WinBAttributes13: 	db	0
   981                              <1> WinGranularity13: 	dw	VBE_DISPI_BANK_SIZE_KB
   982                              <1> WinSize13: 		dw	VBE_DISPI_BANK_SIZE_KB
   983                              <1> WinASegment13:		dw	VGAMEM_GRAPH
   984                              <1> WinBSegment13:		dw	0000h
   985                              <1> WinFuncPtr13:		dd	0
   986                              <1> BytesPerScanLine13:	dw	1280
   987                              <1> XResolution13:		dw	320
   988                              <1> YResolution13:		dw	200
   989                              <1> XCharSize13:		db	8
   990                              <1> YCharSize13:		db	16
   991                              <1> NumberOfPlanes13:	db	1
   992                              <1> BitsPerPixel13:		db	32
   993                              <1> NumberOfBanks13:	db	4
   994                              <1> MemoryModel13:		db	VBE_MEMORYMODEL_DIRECT_COLOR
   995                              <1> BankSize13:		db	0
   996                              <1> NumberOfImagePages13:	db	64
   997                              <1> Reserved_page13:	db	0
   998                              <1> RedMaskSize13:		db	8
   999                              <1> RedFieldPosition13:	db	16
  1000                              <1> GreenMaskSize13:	db	8
  1001                              <1> GreenFieldPosition13:	db	8
  1002                              <1> BlueMaskSize13:		db	8
  1003                              <1> BlueFieldPosition13:	db	0
  1004                              <1> RsvdMaskSize13:		db	8
  1005                              <1> RsvdFieldPosition13:	db	24
  1006                              <1> DirectColorModeInfo13:	db	VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE
  1007                              <1> PhysBasePtr13:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
  1008                              <1> OffScreenMemOffset13:	dd	0
  1009                              <1> OffScreenMemSize13:	dw	0
  1010                              <1> LinBytesPerScanLine13:	dw	1280
  1011                              <1> BnkNumberOfPages13: 	db	0
  1012                              <1> LinNumberOfPages13: 	db	0
  1013                              <1> LinRedMaskSize13:	db	8
  1014                              <1> LinRedFieldPosition13:	db	16
  1015                              <1> LinGreenMaskSize13:	db	8
  1016                              <1> LinGreenFieldPosition13:db	8
  1017                              <1> LinBlueMaskSize13:	db	8
  1018                              <1> LinBlueFieldPosition13:	db	0
  1019                              <1> LinRsvdMaskSize13:	db	8
  1020                              <1> LinRsvdFieldPosition13:	db	24
  1021                              <1> MaxPixelClock13:	dd	0
  1022                              <1> 
  1023                              <1> 			dw	0141h ; 640x400x32
  1024                              <1> ModeAttributes14: 	dw	MODE_ATTRIBUTES
  1025                              <1> WinAAttributes14: 	db	WINA_ATTRIBUTES
  1026                              <1> WinBAttributes14: 	db	0
  1027                              <1> WinGranularity14: 	dw	VBE_DISPI_BANK_SIZE_KB
  1028                              <1> WinSize14: 		dw	VBE_DISPI_BANK_SIZE_KB
  1029                              <1> WinASegment14:		dw	VGAMEM_GRAPH
  1030                              <1> WinBSegment14:		dw	0000h
  1031                              <1> WinFuncPtr14:		dd	0
  1032                              <1> BytesPerScanLine14:	dw	2560
  1033                              <1> XResolution14:		dw	640
  1034                              <1> YResolution14:		dw	400
  1035                              <1> XCharSize14:		db	8
  1036                              <1> YCharSize14:		db	16
  1037                              <1> NumberOfPlanes14:	db	1
  1038                              <1> BitsPerPixel14:		db	32
  1039                              <1> NumberOfBanks14:	db	16
  1040                              <1> MemoryModel14:		db	VBE_MEMORYMODEL_DIRECT_COLOR
  1041                              <1> BankSize14:		db	0
  1042                              <1> NumberOfImagePages14:	db	15
  1043                              <1> Reserved_page14:	db	0
  1044                              <1> RedMaskSize14:		db	8
  1045                              <1> RedFieldPosition14:	db	16
  1046                              <1> GreenMaskSize14:	db	8
  1047                              <1> GreenFieldPosition14:	db	8
  1048                              <1> BlueMaskSize14:		db	8
  1049                              <1> BlueFieldPosition14:	db	0
  1050                              <1> RsvdMaskSize14:		db	8
  1051                              <1> RsvdFieldPosition14:	db	24
  1052                              <1> DirectColorModeInfo14:	db	VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE
  1053                              <1> PhysBasePtr14:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
  1054                              <1> OffScreenMemOffset14:	dd  	0
  1055                              <1> OffScreenMemSize14:	dw	0
  1056                              <1> LinBytesPerScanLine14:	dw	2560
  1057                              <1> BnkNumberOfPages14: 	db	0
  1058                              <1> LinNumberOfPages14: 	db	0
  1059                              <1> LinRedMaskSize14:	db	8
  1060                              <1> LinRedFieldPosition14:	db	16
  1061                              <1> LinGreenMaskSize14:	db	8
  1062                              <1> LinGreenFieldPosition14:db	8
  1063                              <1> LinBlueMaskSize14:	db	8
  1064                              <1> LinBlueFieldPosition14:	db	0
  1065                              <1> LinRsvdMaskSize14:	db	8
  1066                              <1> LinRsvdFieldPosition14:	db	24
  1067                              <1> MaxPixelClock14:	dd	0
  1068                              <1> 
  1069                              <1> 			dw	0142 ; 640x480x32
  1070                              <1> ModeAttributes15: 	dw	MODE_ATTRIBUTES
  1071                              <1> WinAAttributes15: 	db	WINA_ATTRIBUTES
  1072                              <1> WinBAttributes15: 	db	0
  1073                              <1> WinGranularity15: 	dw	VBE_DISPI_BANK_SIZE_KB
  1074                              <1> WinSize15: 		dw	VBE_DISPI_BANK_SIZE_KB
  1075                              <1> WinASegment15:		dw	VGAMEM_GRAPH
  1076                              <1> WinBSegment15:		dw	0000h
  1077                              <1> WinFuncPtr15:		dd	0
  1078                              <1> BytesPerScanLine15:	dw	2560
  1079                              <1> XResolution15:		dw	640
  1080                              <1> YResolution15:		dw	480
  1081                              <1> XCharSize15:		db	8
  1082                              <1> YCharSize15:		db	16
  1083                              <1> NumberOfPlanes15:	db	1
  1084                              <1> BitsPerPixel15:		db	32
  1085                              <1> NumberOfBanks15:	db	19
  1086                              <1> MemoryModel15:		db	VBE_MEMORYMODEL_DIRECT_COLOR
  1087                              <1> BankSize15:		db	0
  1088                              <1> NumberOfImagePages15:	db	12
  1089                              <1> Reserved_page15:	db	0
  1090                              <1> RedMaskSize15:		db	8
  1091                              <1> RedFieldPosition15:	db	16
  1092                              <1> GreenMaskSize15:	db	8
  1093                              <1> GreenFieldPosition15:	db	8
  1094                              <1> BlueMaskSize15:		db	8
  1095                              <1> BlueFieldPosition15:	db	0
  1096                              <1> RsvdMaskSize15:		db	8
  1097                              <1> RsvdFieldPosition15:	db	24
  1098                              <1> DirectColorModeInfo15:	db	VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE,
  1099                              <1> PhysBasePtr15:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS,
  1100                              <1> OffScreenMemOffset15:	dd	0
  1101                              <1> OffScreenMemSize15:	dw	0
  1102                              <1> LinBytesPerScanLine15:	dw	2560
  1103                              <1> BnkNumberOfPages15: 	db	0
  1104                              <1> LinNumberOfPages15: 	db	0
  1105                              <1> LinRedMaskSize15:	db	8
  1106                              <1> LinRedFieldPosition15:	db	16
  1107                              <1> LinGreenMaskSize15:	db	8
  1108                              <1> LinGreenFieldPosition15:db	8
  1109                              <1> LinBlueMaskSize15:	db	8
  1110                              <1> LinBlueFieldPosition15:	db	0
  1111                              <1> LinRsvdMaskSize15:	db	8
  1112                              <1> LinRsvdFieldPosition15:	db	24
  1113                              <1> MaxPixelClock15:	dd	0
  1114                              <1> 
  1115                              <1> 			dw	0143h ; 800x600x32
  1116                              <1> ModeAttributes16: 	dw	MODE_ATTRIBUTES
  1117                              <1> WinAAttributes16: 	db	WINA_ATTRIBUTES
  1118                              <1> WinBAttributes16: 	db	0
  1119                              <1> WinGranularity16: 	dw	VBE_DISPI_BANK_SIZE_KB
  1120                              <1> WinSize16: 		dw	VBE_DISPI_BANK_SIZE_KB
  1121                              <1> WinASegment16:		dw	VGAMEM_GRAPH
  1122                              <1> WinBSegment16:		dw	0000h
  1123                              <1> WinFuncPtr16:		dd	0
  1124                              <1> BytesPerScanLine16:	dw	3200
  1125                              <1> XResolution16:		dw	800
  1126                              <1> YResolution16:		dw	600
  1127                              <1> XCharSize16:		db	8
  1128                              <1> YCharSize16:		db	16
  1129                              <1> NumberOfPlanes16:	db	1
  1130                              <1> BitsPerPixel16:		db	32
  1131                              <1> NumberOfBanks16:	db	30
  1132                              <1> MemoryModel16:		db	VBE_MEMORYMODEL_DIRECT_COLOR
  1133                              <1> BankSize16:		db	0
  1134                              <1> NumberOfImagePages16:	db	7
  1135                              <1> Reserved_page16:	db	0
  1136                              <1> RedMaskSize16:		db	8
  1137                              <1> RedFieldPosition16:	db	16
  1138                              <1> GreenMaskSize16:	db	8
  1139                              <1> GreenFieldPosition16:	db	8
  1140                              <1> BlueMaskSize16:		db	8
  1141                              <1> BlueFieldPosition16:	db	0
  1142                              <1> RsvdMaskSize16:		db	8
  1143                              <1> RsvdFieldPosition16:	db	24
  1144                              <1> DirectColorModeInfo16:	db	VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE,
  1145                              <1> PhysBasePtr16:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS,
  1146                              <1> OffScreenMemOffset16:	dd	0
  1147                              <1> OffScreenMemSize16:	dw	0
  1148                              <1> LinBytesPerScanLine16:	dw	3200
  1149                              <1> BnkNumberOfPages16: 	db	0
  1150                              <1> LinNumberOfPages16: 	db	0
  1151                              <1> LinRedMaskSize16:	db	8
  1152                              <1> LinRedFieldPosition16:	db	16
  1153                              <1> LinGreenMaskSize16:	db	8
  1154                              <1> LinGreenFieldPosition16:db	8
  1155                              <1> LinBlueMaskSize16:	db	8
  1156                              <1> LinBlueFieldPosition16:	db	0
  1157                              <1> LinRsvdMaskSize16:	db	8
  1158                              <1> LinRsvdFieldPosition16:	db	24
  1159                              <1> MaxPixelClock16:	dd	0
  1160                              <1> 	
  1161                              <1> 			dw	0144h ; 1024x768x32
  1162                              <1> ModeAttributes17: 	dw	MODE_ATTRIBUTES
  1163                              <1> WinAAttributes17: 	db	WINA_ATTRIBUTES
  1164                              <1> WinBAttributes17: 	db	0
  1165                              <1> WinGranularity17: 	dw	VBE_DISPI_BANK_SIZE_KB
  1166                              <1> WinSize17: 		dw	VBE_DISPI_BANK_SIZE_KB
  1167                              <1> WinASegment17:		dw	VGAMEM_GRAPH
  1168                              <1> WinBSegment17:		dw	0000h
  1169                              <1> WinFuncPtr17:		dd	0
  1170                              <1> BytesPerScanLine17:	dw	4096
  1171                              <1> XResolution17:		dw	1024
  1172                              <1> YResolution17:		dw	768
  1173                              <1> XCharSize17:		db	8
  1174                              <1> YCharSize17:		db	16
  1175                              <1> NumberOfPlanes17:	db	1
  1176                              <1> BitsPerPixel17:		db	32
  1177                              <1> NumberOfBanks17:	db	48
  1178                              <1> MemoryModel17:		db	VBE_MEMORYMODEL_DIRECT_COLOR
  1179                              <1> BankSize17:		db	0
  1180                              <1> NumberOfImagePages17:	db	4
  1181                              <1> Reserved_page17:	db	0
  1182                              <1> RedMaskSize17:		db	8
  1183                              <1> RedFieldPosition17:	db	16
  1184                              <1> GreenMaskSize17:	db	8
  1185                              <1> GreenFieldPosition17:	db	8
  1186                              <1> BlueMaskSize17:		db	8
  1187                              <1> BlueFieldPosition17:	db	0
  1188                              <1> RsvdMaskSize17:		db	8
  1189                              <1> RsvdFieldPosition17:	db	24
  1190                              <1> DirectColorModeInfo17:	db	VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE
  1191                              <1> PhysBasePtr17:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
  1192                              <1> OffScreenMemOffset17:	dd	0
  1193                              <1> OffScreenMemSize17:	dw	0
  1194                              <1> LinBytesPerScanLine17:	dw	4096
  1195                              <1> BnkNumberOfPages17: 	db	0
  1196                              <1> LinNumberOfPages17: 	db	0
  1197                              <1> LinRedMaskSize17:	db	8
  1198                              <1> LinRedFieldPosition17:	db	16
  1199                              <1> LinGreenMaskSize17:	db	8
  1200                              <1> LinGreenFieldPosition17:db	8
  1201                              <1> LinBlueMaskSize17:	db	8
  1202                              <1> LinBlueFieldPosition17:	db	0
  1203                              <1> LinRsvdMaskSize17:	db	8
  1204                              <1> LinRsvdFieldPosition17:	db	24
  1205                              <1> MaxPixelClock17:	dd	0
  1206                              <1> 	
  1207                              <1> 			dw	0146h ; 320x200x8
  1208                              <1> ModeAttributes18: 	dw	MODE_ATTRIBUTES
  1209                              <1> WinAAttributes18: 	db	WINA_ATTRIBUTES
  1210                              <1> WinBAttributes18: 	db	0
  1211                              <1> WinGranularity18: 	dw	VBE_DISPI_BANK_SIZE_KB
  1212                              <1> WinSize18: 		dw	VBE_DISPI_BANK_SIZE_KB
  1213                              <1> WinASegment18:		dw	VGAMEM_GRAPH
  1214                              <1> WinBSegment18:		dw	0000h
  1215                              <1> WinFuncPtr18:		dd	0
  1216                              <1> BytesPerScanLine18:	dw	320
  1217                              <1> XResolution18:		dw	320
  1218                              <1> YResolution18:		dw	200
  1219                              <1> XCharSize18:		db	8
  1220                              <1> YCharSize18:		db	16
  1221                              <1> NumberOfPlanes18:	db	1
  1222                              <1> BitsPerPixel18:		db	8
  1223                              <1> NumberOfBanks18:	db	1
  1224                              <1> MemoryModel18:		db	VBE_MEMORYMODEL_PACKED_PIXEL
  1225                              <1> BankSize18:		db	0
  1226                              <1> NumberOfImagePages18:	db	255 ; 261 in vbetables.h (03/01/2020) !
  1227                              <1> Reserved_page18:	db	0
  1228                              <1> RedMaskSize18:		db	0
  1229                              <1> RedFieldPosition18:	db	0
  1230                              <1> GreenMaskSize18:	db	0
  1231                              <1> GreenFieldPosition18:	db	0
  1232                              <1> BlueMaskSize18:		db	0
  1233                              <1> BlueFieldPosition18:	db	0
  1234                              <1> RsvdMaskSize18:		db	0
  1235                              <1> RsvdFieldPosition18:	db	0
  1236                              <1> DirectColorModeInfo18:	db	0
  1237                              <1> PhysBasePtr18:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
  1238                              <1> OffScreenMemOffset18:	dd	0
  1239                              <1> OffScreenMemSize18:	dw	0
  1240                              <1> LinBytesPerScanLine18:	dw	320
  1241                              <1> BnkNumberOfPages18: 	db	0
  1242                              <1> LinNumberOfPages18: 	db	0
  1243                              <1> LinRedMaskSize18:	db	0
  1244                              <1> LinRedFieldPosition18: 	db	0
  1245                              <1> LinGreenMaskSize18: 	db	0
  1246                              <1> LinGreenFieldPosition18:db	0
  1247                              <1> LinBlueMaskSize18: 	db	0
  1248                              <1> LinBlueFieldPosition18: db	0
  1249                              <1> LinRsvdMaskSize18: 	db	0
  1250                              <1> LinRsvdFieldPosition18: db	0
  1251                              <1> MaxPixelClock18:	dd	0
  1252                              <1> 
  1253                              <1> 			dw	018Dh ; 1280x720x16
  1254                              <1> ModeAttributes19: 	dw	MODE_ATTRIBUTES
  1255                              <1> WinAAttributes19: 	db	WINA_ATTRIBUTES
  1256                              <1> WinBAttributes19: 	db	0
  1257                              <1> WinGranularity19: 	dw	VBE_DISPI_BANK_SIZE_KB
  1258                              <1> WinSize19: 		dw	VBE_DISPI_BANK_SIZE_KB
  1259                              <1> WinASegment19:		dw	VGAMEM_GRAPH
  1260                              <1> WinBSegment19:		dw	0000h
  1261                              <1> WinFuncPtr19:		dd	0
  1262                              <1> BytesPerScanLine19:	dw	2560
  1263                              <1> XResolution19:		dw	1280
  1264                              <1> YResolution19:		dw	720
  1265                              <1> XCharSize19:		db	8
  1266                              <1> YCharSize19:		db	16
  1267                              <1> NumberOfPlanes19:	db	1
  1268                              <1> BitsPerPixel19:		db	16
  1269                              <1> NumberOfBanks19:	db	29
  1270                              <1> MemoryModel19:		db	VBE_MEMORYMODEL_DIRECT_COLOR
  1271                              <1> BankSize19:		db	0
  1272                              <1> NumberOfImagePages19:	db	8
  1273                              <1> Reserved_page19:	db	0
  1274                              <1> RedMaskSize19:		db	5
  1275                              <1> RedFieldPosition19:	db	11
  1276                              <1> GreenMaskSize19:	db	6
  1277                              <1> GreenFieldPosition19:	db	5
  1278                              <1> BlueMaskSize19:		db	5
  1279                              <1> BlueFieldPosition19:	db	0
  1280                              <1> RsvdMaskSize19:		db	0
  1281                              <1> RsvdFieldPosition19:	db	0
  1282                              <1> DirectColorModeInfo19:	db	0
  1283                              <1> PhysBasePtr19:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
  1284                              <1> OffScreenMemOffset19:	dd	0
  1285                              <1> OffScreenMemSize19:	dw	0
  1286                              <1> LinBytesPerScanLine19:	dw	2560
  1287                              <1> BnkNumberOfPages19: 	db	0
  1288                              <1> LinNumberOfPages19: 	db	0
  1289                              <1> LinRedMaskSize19:	db	5
  1290                              <1> LinRedFieldPosition19:	db	11
  1291                              <1> LinGreenMaskSize19:	db	6
  1292                              <1> LinGreenFieldPosition19:db	5
  1293                              <1> LinBlueMaskSize19:	db	5
  1294                              <1> LinBlueFieldPosition19:	db	0
  1295                              <1> LinRsvdMaskSize19:	db	0
  1296                              <1> LinRsvdFieldPosition19:	db	0
  1297                              <1> MaxPixelClock19:	dd	0
  1298                              <1> 
  1299                              <1> 			dw	018Eh ; 1280x720x24
  1300                              <1> ModeAttributes20: 	dw	MODE_ATTRIBUTES
  1301                              <1> WinAAttributes20: 	db	WINA_ATTRIBUTES
  1302                              <1> WinBAttributes20: 	db	0
  1303                              <1> WinGranularity20: 	dw	VBE_DISPI_BANK_SIZE_KB
  1304                              <1> WinSize20: 		dw	VBE_DISPI_BANK_SIZE_KB
  1305                              <1> WinASegment20:		dw	VGAMEM_GRAPH
  1306                              <1> WinBSegment20:		dw	0000h
  1307                              <1> WinFuncPtr20:		dd	0
  1308                              <1> BytesPerScanLine20:	dw	3840
  1309                              <1> XResolution20:		dw	1280
  1310                              <1> YResolution20:		dw	720
  1311                              <1> XCharSize20:		db	8
  1312                              <1> YCharSize20:		db	16
  1313                              <1> NumberOfPlanes20:	db	1
  1314                              <1> BitsPerPixel20:		db	24
  1315                              <1> NumberOfBanks20:	db	43
  1316                              <1> MemoryModel20:		db	VBE_MEMORYMODEL_DIRECT_COLOR
  1317                              <1> BankSize20:		db	0
  1318                              <1> NumberOfImagePages20:	db	5
  1319                              <1> Reserved_page20:	db	0
  1320                              <1> RedMaskSize20:		db	8
  1321                              <1> RedFieldPosition20:	db	16
  1322                              <1> GreenMaskSize20:	db	8
  1323                              <1> GreenFieldPosition20:	db	8
  1324                              <1> BlueMaskSize20:		db	8
  1325                              <1> BlueFieldPosition20:	db	0
  1326                              <1> RsvdMaskSize20:		db	0
  1327                              <1> RsvdFieldPosition20:	db	0
  1328                              <1> DirectColorModeInfo20:	db	0
  1329                              <1> PhysBasePtr20:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
  1330                              <1> OffScreenMemOffset20:	dd	0
  1331                              <1> OffScreenMemSize20:	dw	0
  1332                              <1> LinBytesPerScanLine20:	dw	3840
  1333                              <1> BnkNumberOfPages20: 	db	0
  1334                              <1> LinNumberOfPages20: 	db	0
  1335                              <1> LinRedMaskSize20:	db	8
  1336                              <1> LinRedFieldPosition20:	db	16
  1337                              <1> LinGreenMaskSize20:	db	8
  1338                              <1> LinGreenFieldPosition20:db	8
  1339                              <1> LinBlueMaskSize20:	db	8
  1340                              <1> LinBlueFieldPosition20:	db	0
  1341                              <1> LinRsvdMaskSize20:	db	0
  1342                              <1> LinRsvdFieldPosition20:	db	0
  1343                              <1> MaxPixelClock20:	dd	0
  1344                              <1> 	
  1345                              <1> 			dw	018Fh ; 1280x720x32
  1346                              <1> ModeAttributes21: 	dw	MODE_ATTRIBUTES
  1347                              <1> WinAAttributes21: 	db	WINA_ATTRIBUTES
  1348                              <1> WinBAttributes21: 	db	0
  1349                              <1> WinGranularity21: 	dw	VBE_DISPI_BANK_SIZE_KB
  1350                              <1> WinSize21: 		dw	VBE_DISPI_BANK_SIZE_KB
  1351                              <1> WinASegment21:		dw	VGAMEM_GRAPH
  1352                              <1> WinBSegment21:		dw	0000h
  1353                              <1> WinFuncPtr21:		dd	0
  1354                              <1> BytesPerScanLine21:	dw	5120
  1355                              <1> XResolution21:		dw	1280
  1356                              <1> YResolution21:		dw	720
  1357                              <1> XCharSize21:		db	8
  1358                              <1> YCharSize21:		db	16
  1359                              <1> NumberOfPlanes21:	db	1
  1360                              <1> BitsPerPixel21:		db	32
  1361                              <1> NumberOfBanks21:	db	57
  1362                              <1> MemoryModel21:		db	VBE_MEMORYMODEL_DIRECT_COLOR
  1363                              <1> BankSize21:		db	0
  1364                              <1> NumberOfImagePages21:	db	3
  1365                              <1> Reserved_page21:	db	0
  1366                              <1> RedMaskSize21:		db	8
  1367                              <1> RedFieldPosition21:	db	16
  1368                              <1> GreenMaskSize21:	db	8
  1369                              <1> GreenFieldPosition21:	db	8
  1370                              <1> BlueMaskSize21:		db	8
  1371                              <1> BlueFieldPosition21:	db	0
  1372                              <1> RsvdMaskSize21:		db	8
  1373                              <1> RsvdFieldPosition21:	db	24
  1374                              <1> DirectColorModeInfo21:	db	VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE
  1375                              <1> PhysBasePtr21:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
  1376                              <1> OffScreenMemOffset21:	dd	0
  1377                              <1> OffScreenMemSize21:	dw	0
  1378                              <1> LinBytesPerScanLine21:	dw	5120
  1379                              <1> BnkNumberOfPages21: 	db	0
  1380                              <1> LinNumberOfPages21: 	db	0
  1381                              <1> LinRedMaskSize21:	db	8
  1382                              <1> LinRedFieldPosition21:	db	16
  1383                              <1> LinGreenMaskSize21:	db	8
  1384                              <1> LinGreenFieldPosition21:db	8
  1385                              <1> LinBlueMaskSize21:	db	8
  1386                              <1> LinBlueFieldPosition21:	db	0
  1387                              <1> LinRsvdMaskSize21:	db	8
  1388                              <1> LinRsvdFieldPosition21:	db	24
  1389                              <1> MaxPixelClock21:	dd	0
  1390                              <1> 			
  1391                              <1> 			dw	0190h ; 1920x1080x16
  1392                              <1> ModeAttributes22: 	dw	MODE_ATTRIBUTES
  1393                              <1> WinAAttributes22: 	db	WINA_ATTRIBUTES
  1394                              <1> WinBAttributes22: 	db	0
  1395                              <1> WinGranularity22: 	dw	VBE_DISPI_BANK_SIZE_KB
  1396                              <1> WinSize22: 		dw	VBE_DISPI_BANK_SIZE_KB
  1397                              <1> WinASegment22:		dw	VGAMEM_GRAPH
  1398                              <1> WinBSegment22:		dw	0000h
  1399                              <1> WinFuncPtr22:		dd	0
  1400                              <1> BytesPerScanLine22:	dw	3840
  1401                              <1> XResolution22:		dw	1920
  1402                              <1> YResolution22:		dw	1080
  1403                              <1> XCharSize22:		db	8
  1404                              <1> YCharSize22:		db	16
  1405                              <1> NumberOfPlanes22:	db	1
  1406                              <1> BitsPerPixel22:		db	16
  1407                              <1> NumberOfBanks22:	db	64
  1408                              <1> MemoryModel22:		db	VBE_MEMORYMODEL_DIRECT_COLOR,
  1409                              <1> BankSize22:		db	0
  1410                              <1> NumberOfImagePages22:	db	3
  1411                              <1> Reserved_page22:	db	0
  1412                              <1> RedMaskSize22:		db	5
  1413                              <1> RedFieldPosition22:	db	11
  1414                              <1> GreenMaskSize22:	db	6
  1415                              <1> GreenFieldPosition22:	db	5
  1416                              <1> BlueMaskSize22:		db	5
  1417                              <1> BlueFieldPosition22:	db	0
  1418                              <1> RsvdMaskSize22:		db	0
  1419                              <1> RsvdFieldPosition22:	db	0
  1420                              <1> DirectColorModeInfo22:	db	0
  1421                              <1> PhysBasePtr22:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
  1422                              <1> OffScreenMemOffset22:	dd	0
  1423                              <1> OffScreenMemSize22:	dw	0
  1424                              <1> LinBytesPerScanLine22:	dw	3840
  1425                              <1> BnkNumberOfPages22: 	db	0
  1426                              <1> LinNumberOfPages22: 	db	0
  1427                              <1> LinRedMaskSize22:	db	5
  1428                              <1> LinRedFieldPosition22:	db	11
  1429                              <1> LinGreenMaskSize22:	db	6
  1430                              <1> LinGreenFieldPosition22:db	5
  1431                              <1> LinBlueMaskSize22:	db	5
  1432                              <1> LinBlueFieldPosition22:	db	0
  1433                              <1> LinRsvdMaskSize22:	db	0
  1434                              <1> LinRsvdFieldPosition22:	db	0
  1435                              <1> MaxPixelClock22:	dd	0
  1436                              <1> 			
  1437                              <1> 			dw	0191h ; 1920x1080x24
  1438                              <1> ModeAttributes23: 	dw	MODE_ATTRIBUTES
  1439                              <1> WinAAttributes23: 	db	WINA_ATTRIBUTES
  1440                              <1> WinBAttributes23: 	db	0
  1441                              <1> WinGranularity23: 	dw	VBE_DISPI_BANK_SIZE_KB
  1442                              <1> WinSize23: 		dw	VBE_DISPI_BANK_SIZE_KB
  1443                              <1> WinASegment23:		dw	VGAMEM_GRAPH
  1444                              <1> WinBSegment23:		dw	0000h
  1445                              <1> WinFuncPtr23:		dd	0
  1446                              <1> BytesPerScanLine23:	dw	5760
  1447                              <1> XResolution23:		dw	1920
  1448                              <1> YResolution23:		dw	1080
  1449                              <1> XCharSize23:		db	8
  1450                              <1> YCharSize23:		db	16
  1451                              <1> NumberOfPlanes23:	db	1
  1452                              <1> BitsPerPixel23:		db	24
  1453                              <1> NumberOfBanks23:	db	95
  1454                              <1> MemoryModel23:		db	VBE_MEMORYMODEL_DIRECT_COLOR
  1455                              <1> BankSize23:		db	0
  1456                              <1> NumberOfImagePages23:	db	1
  1457                              <1> Reserved_page23:	db	0
  1458                              <1> RedMaskSize23:		db	8
  1459                              <1> RedFieldPosition23:	db	16
  1460                              <1> GreenMaskSize23:	db	8
  1461                              <1> GreenFieldPosition23:	db	8
  1462                              <1> BlueMaskSize23:		db	8
  1463                              <1> BlueFieldPosition23:	db	0
  1464                              <1> RsvdMaskSize23:		db	0
  1465                              <1> RsvdFieldPosition23:	db	0
  1466                              <1> DirectColorModeInfo23:	db	0
  1467                              <1> PhysBasePtr23:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
  1468                              <1> OffScreenMemOffset23:	dd	0
  1469                              <1> OffScreenMemSize23:	dw	0
  1470                              <1> LinBytesPerScanLine23:	dw	5760
  1471                              <1> BnkNumberOfPages23: 	db	0
  1472                              <1> LinNumberOfPages23: 	db	0
  1473                              <1> LinRedMaskSize23:	db	8
  1474                              <1> LinRedFieldPosition23:	db	16
  1475                              <1> LinGreenMaskSize23:	db	8
  1476                              <1> LinGreenFieldPosition23:db	8
  1477                              <1> LinBlueMaskSize23:	db	8
  1478                              <1> LinBlueFieldPosition23:	db	0
  1479                              <1> LinRsvdMaskSize23:	db	0
  1480                              <1> LinRsvdFieldPosition23:	db	0
  1481                              <1> MaxPixelClock23:	dd	0
  1482                              <1> 
  1483                              <1> 			dw	0192h ; 1920x1080x32
  1484                              <1> ModeAttributes24: 	dw	MODE_ATTRIBUTES
  1485                              <1> WinAAttributes24: 	db	WINA_ATTRIBUTES
  1486                              <1> WinBAttributes24: 	db	0
  1487                              <1> WinGranularity24: 	dw	VBE_DISPI_BANK_SIZE_KB
  1488                              <1> WinSize24: 		dw	VBE_DISPI_BANK_SIZE_KB
  1489                              <1> WinASegment24:		dw	VGAMEM_GRAPH
  1490                              <1> WinBSegment24:		dw	0000h
  1491                              <1> WinFuncPtr24:		dd	0
  1492                              <1> BytesPerScanLine24:	dw	7680
  1493                              <1> XResolution24:		dw	1920
  1494                              <1> YResolution24:		dw	1080
  1495                              <1> XCharSize24:		db	8
  1496                              <1> YCharSize24:		db	16
  1497                              <1> NumberOfPlanes24:	db	1
  1498                              <1> BitsPerPixel24:		db	32
  1499                              <1> NumberOfBanks24:	db	127
  1500                              <1> MemoryModel24:		db	VBE_MEMORYMODEL_DIRECT_COLOR
  1501                              <1> BankSize24:		db	0
  1502                              <1> NumberOfImagePages24:	db	1
  1503                              <1> Reserved_page24:	db	0
  1504                              <1> RedMaskSize24:		db	8
  1505                              <1> RedFieldPosition24:	db	16
  1506                              <1> GreenMaskSize24:	db	8
  1507                              <1> GreenFieldPosition24:	db	8
  1508                              <1> BlueMaskSize24:		db	8
  1509                              <1> BlueFieldPosition24:	db	0
  1510                              <1> RsvdMaskSize24:		db	8
  1511                              <1> RsvdFieldPosition24:	db	24
  1512                              <1> DirectColorModeInfo24:	db	VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE
  1513                              <1> PhysBasePtr24:		dd	VBE_DISPI_LFB_PHYSICAL_ADDRESS
  1514                              <1> OffScreenMemOffset24:	dd	0
  1515                              <1> OffScreenMemSize24:	dw	0
  1516                              <1> LinBytesPerScanLine24:	dw 	7680
  1517                              <1> BnkNumberOfPages24: 	db	0
  1518                              <1> LinNumberOfPages24: 	db	0
  1519                              <1> LinRedMaskSize24:	db	8
  1520                              <1> LinRedFieldPosition24:	db	16
  1521                              <1> LinGreenMaskSize24:	db	8
  1522                              <1> LinGreenFieldPosition24:db	8
  1523                              <1> LinBlueMaskSize24:	db	8
  1524                              <1> LinBlueFieldPosition24:	db	0
  1525                              <1> LinRsvdMaskSize24:	db	8
  1526                              <1> LinRsvdFieldPosition24:	db	24
  1527                              <1> MaxPixelClock24:	dd	0
  1528                              <1> 
  1529                              <1> VBE_VESA_MODE_END_OF_LIST: dw	0
  1530                              <1> 
  1531                              <1> %endif
  1532                              <1> 
  1533                              <1> ; 24/11/2020
  1534                              <1> 
  1535                              <1> direct_color_fields:
  1536                              <1> 	; 24/11/2020
  1537                              <1> 
  1538                              <1> ; (vbetables-gen.c)
  1539                              <1> ; // Direct Color fields 
  1540                              <1> ; (required for direct/6 and YUV/7 memory models)
  1541                              <1> ; switch(pm->depth) {
  1542                              <1>     
  1543                              <1> ;case 8:
  1544 00006B6A 00                  <1> r_size_8:  db 0
  1545 00006B6B 00                  <1> r_pos_8:   db 0
  1546 00006B6C 00                  <1> g_size_8:  db 0
  1547 00006B6D 00                  <1> g_pos_8:   db 0
  1548 00006B6E 00                  <1> b_size_8:  db 0
  1549 00006B6F 00                  <1> b_pos_8:   db 0
  1550 00006B70 00                  <1> a_size_8:  db 0
  1551 00006B71 00                  <1> a_pos_8:   db 0
  1552                              <1> 
  1553                              <1> ;case 16:
  1554 00006B72 05                  <1> r_size_16:  db 5
  1555 00006B73 0B                  <1> r_pos_16:   db 11
  1556 00006B74 06                  <1> g_size_16:  db 6
  1557 00006B75 05                  <1> g_pos_16:   db 5
  1558 00006B76 05                  <1> b_size_16:  db 5
  1559 00006B77 00                  <1> b_pos_16:   db 0
  1560 00006B78 00                  <1> a_size_16:  db 0
  1561 00006B79 00                  <1> a_pos_16:   db 0
  1562                              <1> 
  1563                              <1> ;case 24:
  1564 00006B7A 08                  <1> r_size_24:  db 8
  1565 00006B7B 10                  <1> r_pos_24:   db 16
  1566 00006B7C 08                  <1> g_size_24:  db 8
  1567 00006B7D 08                  <1> g_pos_24:   db 8
  1568 00006B7E 08                  <1> b_size_24:  db 8
  1569 00006B7F 00                  <1> b_pos_24:   db 0
  1570 00006B80 00                  <1> a_size_24:  db 0
  1571 00006B81 00                  <1> a_pos_24:   db 0
  1572                              <1> 
  1573                              <1> ;case 32:
  1574 00006B82 08                  <1> r_size_32:  db 8
  1575 00006B83 10                  <1> r_pos_32:   db 16
  1576 00006B84 08                  <1> g_size_32:  db 8
  1577 00006B85 08                  <1> g_pos_32:   db 8
  1578 00006B86 08                  <1> b_size_32:  db 8
  1579 00006B87 00                  <1> b_pos_32:   db 0
  1580 00006B88 08                  <1> a_size_32:  db 8
  1581 00006B89 18                  <1> a_pos_32:   db 24
  3300                                  ;%include 'diskdata.s'	; DISK (BIOS) DATA (initialized)
  3301                                  ;;;
  3302                                  
  3303                                  Align 2
  3304                                  
  3305                                  %include 'sysdefs.s' ; 24/01/2015
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.5) - SYSTEM DEFINITIONS : sysdefs.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 23/07/2022  (Previous: 31/12/2017)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 24/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.11 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    11                              <1> ; sysdefs.inc (14/11/2015)
    12                              <1> ; ****************************************************************************
    13                              <1> 
    14                              <1> ; Retro UNIX 386 v1 Kernel - SYSDEFS.INC
    15                              <1> ; Last Modification: 14/11/2015
    16                              <1> ;
    17                              <1> ; ///////// RETRO UNIX 386 V1 SYSTEM DEFINITIONS ///////////////
    18                              <1> ; (Modified from 
    19                              <1> ;	Retro UNIX 8086 v1 system definitions in 'UNIX.ASM', 01/09/2014)
    20                              <1> ; ((UNIX.ASM (RETRO UNIX 8086 V1 Kernel), 11/03/2013 - 01/09/2014))
    21                              <1> ; 	UNIX.ASM (MASM 6.11) --> SYSDEFS.INC (NASM 2.11)
    22                              <1> ; ----------------------------------------------------------------------------
    23                              <1> ;
    24                              <1> ; Derived from UNIX Operating System (v1.0 for PDP-11) 
    25                              <1> ; (Original) Source Code by Ken Thompson (1971-1972)
    26                              <1> ; <Bell Laboratories (17/3/1972)>
    27                              <1> ; <Preliminary Release of UNIX Implementation Document>
    28                              <1> ;
    29                              <1> ; ****************************************************************************
    30                              <1> 
    31                              <1> nproc 	equ	16  ; number of processes
    32                              <1> ;nfiles equ	50
    33                              <1> ntty	equ     8   ; 8+1 -> 8 (10/05/2013)
    34                              <1> nbuf	equ	4   ; 6 ;; 21/08/2015 - 'namei' buffer problem when nbuf > 4 	
    35                              <1> 		; NOTE: If fd0 super block buffer addres is beyond of the 1st
    36                              <1> 		; 32K, DMA r/w routine or someting else causes a jump to 
    37                              <1> 		; kernel panic routine (in 'alloc' routine, in u5.s)
    38                              <1> 		; because of invalid buffer content (r/w error). 
    39                              <1> 		; When all buffers are set before the end of the 1st 32k,
    40                              <1> 		; there is no problem!? (14/11/2015) 
    41                              <1> 
    42                              <1> ;csgmnt	equ	2000h	; 26/05/2013 (segment of process 1)
    43                              <1> ;core	equ 	0  	    ; 19/04/2013	
    44                              <1> ;ecore	equ	32768 - 64  ; 04/06/2013 (24/05/2013)
    45                              <1> 	; (if total size of argument list and arguments is 128 bytes)
    46                              <1> 	; maximum executable file size = 32768-(64+40+128-6) = 32530 bytes
    47                              <1> 	; maximum stack size = 40 bytes (+6 bytes for 'IRET' at 32570)	
    48                              <1> 	; initial value of user's stack pointer = 32768-64-128-2 = 32574
    49                              <1> 	; 	(sp=32768-args_space-2 at the beginning of execution)
    50                              <1> 	; argument list offset = 32768-64-128 = 32576 (if it is 128 bytes)
    51                              <1> 	; 'u' structure offset (for the '/core' dump file) = 32704
    52                              <1> 	; '/core' dump file size = 32768 bytes
    53                              <1>  
    54                              <1> ; 08/03/2014 
    55                              <1> ;sdsegmnt equ	6C0h  ; 256*16 bytes (swap data segment size for 16 processes)		 	 
    56                              <1> ; 19/04/2013 Retro UNIX 8086 v1 feaure only !
    57                              <1> ;;sdsegmnt equ 	740h  ; swap data segment (for user structures and registers)
    58                              <1> 
    59                              <1> ; 30/08/2013
    60                              <1> time_count equ 4 ; 10 --> 4 01/02/2014
    61                              <1> 
    62                              <1> ; 05/02/2014
    63                              <1> ; process status
    64                              <1> ;SFREE 	equ 0
    65                              <1> ;SRUN	equ 1
    66                              <1> ;SWAIT	equ 2
    67                              <1> ;SZOMB	equ 3
    68                              <1> ;SSLEEP	equ 4 ; Retro UNIX 8086 V1 extension (for sleep and wakeup)
    69                              <1> 
    70                              <1> ; 09/03/2015
    71                              <1> userdata equ 80000h ; user structure data address for current user ; temporary
    72                              <1> swap_queue equ 90000h - 2000h ; swap queue address ; temporary
    73                              <1> swap_alloc_table equ 0D0000h  ;  swap allocation table address ; temporary
    74                              <1> 
    75                              <1> ; 17/09/2015
    76                              <1> ESPACE equ 48 ; [u.usp] (at 'sysent') - [u.sp] value for error return
    77                              <1> 
    78                              <1> ; 31/12/2017
    79                              <1> ; 19/02/2017
    80                              <1> ; 15/10/2016
    81                              <1> ; 20/05/2016
    82                              <1> ; 19/05/2016
    83                              <1> ; 18/05/2016
    84                              <1> ; 29/04/2016 
    85                              <1> ; TRDOS 386 (TRDOS v2.0) system calls - temporary List 
    86                              <1> ; 14/07/2013 - 21/09/2015 (Retro UNIX 8086 & 386 system calls) 
    87                              <1> _ver 	equ 0 ; Get TRDOS version (v2.0)
    88                              <1> _exit 	equ 1
    89                              <1> _fork 	equ 2
    90                              <1> _read 	equ 3
    91                              <1> _write	equ 4
    92                              <1> _open	equ 5
    93                              <1> _close 	equ 6
    94                              <1> _wait 	equ 7
    95                              <1> _creat 	equ 8
    96                              <1> _rename	equ 9  ; TRDOS 386, Rename File (31/12/2017)	
    97                              <1> _delete	equ 10 ; TRDOS 386, Delete File (29/12/2017)
    98                              <1> _exec	equ 11
    99                              <1> _chdir	equ 12
   100                              <1> _time 	equ 13 ; TRDOS 386, Get Sys Date&Time (30/12/2017)
   101                              <1> _mkdir 	equ 14
   102                              <1> _chmod	equ 15 ; TRDOS 386, Change Attributes (30/12/2017) 
   103                              <1> _rmdir	equ 16 ; TRDOS 386, Remove Directory (29/12/2017)
   104                              <1> _break	equ 17
   105                              <1> _drive	equ 18 ; TRDOS 386, Get/Set Current Drv (30/12/2017) 
   106                              <1> _seek	equ 19
   107                              <1> _tell 	equ 20
   108                              <1> _mem	equ 21 ; TRDOS 386, Get Total&Free Mem (31/12/2017)
   109                              <1> _prompt	equ 22 ; TRDOS 386, Change Cmd Prompt (31/12/2017)
   110                              <1> _path	equ 23 ; TRDOS 386, Get/Set Run Path (31/12/2017)
   111                              <1> _env	equ 24 ; TRDOS 386, Get/Set Env Vars (31/12/2017)
   112                              <1> _stime	equ 25 ; TRDOS 386, Set Sys Date&Time (30/12/2017)
   113                              <1> _quit	equ 26	
   114                              <1> _intr	equ 27
   115                              <1> _dir	equ 28 ; TRDOS 386, Get Curr Drive&Dir (30/12/2017) 
   116                              <1> _emt 	equ 29
   117                              <1> _ldrvt 	equ 30 ; TRDOS 386, Get Logical DOS DDT (30/12/2017)
   118                              <1> _video  equ 31 ; TRDOS 386 Video Functions (16/05/2016)
   119                              <1> _audio	equ 32 ; TRDOS 386 Video Functions (16/05/2016)
   120                              <1> _timer	equ 33 ; TRDOS 386 Timer Functions (18/05/2016)
   121                              <1> _sleep	equ 34 ; Retro UNIX 8086 v1 feature only !
   122                              <1> _msg	equ 35 ; Retro UNIX 386 v1 feature only !
   123                              <1> _geterr	equ 36 ; Retro UNIX 386 v1 feature only !
   124                              <1> _fpsave equ 37 ; TRDOS 386 FPU state option (28/02/2017)
   125                              <1> _pri 	equ 38 ; change priority - TRDOS 386 (20/05/2016)
   126                              <1> _rele	equ 39 ; TRDOS 386 (19/05/2016)
   127                              <1> _fff	equ 40 ; Find First File - TRDOS 386 (15/10/2016)
   128                              <1> _fnf	equ 41 ; Find Next File - TRDOS 386 (15/10/2016)
   129                              <1> _alloc	equ 42 ; Allocate memory - TRDOS 386 (19/02/2017)
   130                              <1> 	       ; TRDOS 386 (19/02/2017) DMA buff fuctions		
   131                              <1> _dalloc equ 43 ; Deallocate mem - TRDOS 386 (19/02/2017)
   132                              <1> _calbac equ 44 ; Set IRQ callback - TRDOS 386 (20/02/2017)  				
   133                              <1> _dma	equ 45 ; DMA service - TRDOS 386 (20/08/2017)  
   134                              <1> 
   135                              <1> %macro sys 1-4
   136                              <1>     ; 29/04/2016 - TRDOS 386 (TRDOS v2.0)	
   137                              <1>     ; 03/09/2015	
   138                              <1>     ; 13/04/2015
   139                              <1>     ; Retro UNIX 386 v1 system call.		
   140                              <1>     %if %0 >= 2   
   141                              <1>         mov ebx, %2
   142                              <1>         %if %0 >= 3    
   143                              <1>             mov ecx, %3
   144                              <1>             %if %0 = 4
   145                              <1>                mov edx, %4   
   146                              <1>             %endif
   147                              <1>         %endif
   148                              <1>     %endif
   149                              <1>     mov eax, %1
   150                              <1>     ;int 30h
   151                              <1>     int 40h ; TRDOS 386 (TRDOS v2.0)		   
   152                              <1> %endmacro
   153                              <1> 
   154                              <1> ; TRDOS 386 system calls, interrupt number
   155                              <1> ; 25/12/2016
   156                              <1> SYSCALL_INT_NUM   equ '40' ; '40h'
   157                              <1> 
   158                              <1> ; 13/05/2015 - ERROR CODES
   159                              <1> ERR_FILE_NOT_OPEN  equ 10 ; 'file not open !' error
   160                              <1> ERR_FILE_ACCESS    equ 11 ; 'permission denied !' error
   161                              <1> ; 14/05/2015
   162                              <1> ERR_DIR_ACCESS     equ 11 ; 'permission denied !' error
   163                              <1> ERR_FILE_NOT_FOUND equ 12 ; 'file not found !' error
   164                              <1> ERR_TOO_MANY_FILES equ 13 ; 'too many open files !' error
   165                              <1> ERR_DIR_EXISTS     equ 14 ; 'directory already exists !' error 	
   166                              <1> ; 16/05/2015		
   167                              <1> ERR_DRV_NOT_RDY    equ 15 ; 'drive not ready !' error
   168                              <1> ; 18/05/2015
   169                              <1> ERR_DEV_NOT_RDY    equ 15 ; 'device not ready !' error
   170                              <1> ERR_DEV_ACCESS     equ 11 ; 'permission denied !' error 
   171                              <1> ERR_DEV_NOT_OPEN   equ 10 ; 'device not open !' error	
   172                              <1> ; 07/06/2015
   173                              <1> ERR_FILE_EOF	   equ 16 ; 'end of file !' error
   174                              <1> ERR_DEV_VOL_SIZE   equ 16 ; 'out of volume !' error
   175                              <1> ; 09/06/2015
   176                              <1> ERR_DRV_READ	   equ 17 ; 'disk read error !'
   177                              <1> ERR_DRV_WRITE	   equ 18 ; 'disk write error !'
   178                              <1> ; 16/06/2015
   179                              <1> ERR_NOT_DIR	   equ 19 ; 'not a (valid) directory !' error
   180                              <1> ERR_FILE_SIZE	   equ 20 ; 'file size error !'	
   181                              <1> ; 22/06/2015
   182                              <1> ERR_NOT_SUPERUSER  equ 11 ; 'permission denied !' error
   183                              <1> ERR_NOT_OWNER      equ 11 ; 'permission denied !' error
   184                              <1> ERR_NOT_FILE       equ 11 ; 'permission denied !' error	
   185                              <1> ; 23/06/2015
   186                              <1> ERR_FILE_EXISTS    equ 14 ; 'file already exists !' error
   187                              <1> ERR_DRV_NOT_SAME   equ 21 ; 'not same drive !' error
   188                              <1> ERR_DIR_NOT_FOUND  equ 12 ; 'directory not found !' error
   189                              <1> ERR_NOT_EXECUTABLE equ 22 ; 'not executable file !' error
   190                              <1> ; 27/06/2015
   191                              <1> ERR_INV_PARAMETER  equ 23 ; 'invalid parameter !' error
   192                              <1> ERR_INV_DEV_NAME   equ 24 ; 'invalid device name !' error
   193                              <1> ; 29/06/2015
   194                              <1> ERR_TIME_OUT	   equ 25 ; 'time out !' error			
   195                              <1> ERR_DEV_NOT_RESP   equ 25 ; 'device not responding !' error
   196                              <1> ; 10/10/2016
   197                              <1> ERR_INV_FILE_NAME  equ 26 ; 'invalid file name !' error
   198                              <1> ERR_INV_FLAGS	   equ 23 ; 'invalid flags !' error
   199                              <1> ; For code compatibility with previous version of TRDOS (2011)
   200                              <1> ; (Temporary error codes for current TRDOS 386 -2016- version) 
   201                              <1> ERR_NO_MORE_FILES  equ 12 ; 'no more files !' error
   202                              <1> ERR_PATH_NOT_FOUND equ  3 ; 'path not found !' error 
   203                              <1> 			  ; 'dir not found !' ; TRDOS 8086
   204                              <1> ERR_NOT_FOUND:	   equ  2 ; 'file not found !' ; TRDOS 8086
   205                              <1> ERR_DISK_SPACE	   equ 39 ; 'out of volume !' TRDOS 8086
   206                              <1> 			  ; 'insufficient disk space !' ; 27h
   207                              <1> ERR_DISK_WRITE	   equ 30 ; 'disk write protected !' ; 16/10/2016
   208                              <1> ERR_ACCESS_DENIED  equ  5 ; 'access denied !' ; TRDOS 8086 	
   209                              <1> ; 28/02/2017
   210                              <1> ERR_PERM_DENIED	   equ 11 ; 'permission denied !' error  	
   211                              <1> ; 18/05/2016
   212                              <1> ERR_MISC	   equ 27 ; miscellaneous/other errors
   213                              <1> ; 15/10/2016
   214                              <1> ; TRDOS 8086 -> TRDOS 386 (0Bh -> 28)
   215                              <1> ERR_INV_FORMAT	   equ 28 ; 'invalid format !' error
   216                              <1> ; TRDOS 8086 -> TRDOS 386 (0Dh -> 29)
   217                              <1> ERR_INV_DATA	   equ 29 ; 'invalid data !' error
   218                              <1> ; TRDOS 8086 -> TRDOS 386 (0Eh -> 20)
   219                              <1> ERR_ZERO_LENGTH	   equ 20  ; 'zero length !' error 	
   220                              <1> ; TRDOS 8086 -> TRDOS 386 (15h -> 17, 1Dh -> 18, 1Eh -> 17) 	
   221                              <1> ERR_DRV_NR_READ	   equ 17 ; 'drive not ready or read error !'
   222                              <1> ERR_DRV_NR_WRITE   equ 18 ; 'drive not ready or write error !'		
   223                              <1> ; 15/10/2016
   224                              <1> ERR_INV_PATH_NAME  equ 19 ; 'bad path name !' error
   225                              <1> ERR_BAD_CMD_ARG	   equ  1 ; 'bad command argument !' ; TRDOS 8086
   226                              <1> ERR_INV_FNUMBER	   equ  1 ; 'invalid function number !' ; TRDOS 8086
   227                              <1> ERR_BIG_FILE	   equ  8 ; 'big file & out of memory ! ; TRDOS 8086 	
   228                              <1> ERR_BIG_DATA	   equ  8 ; 'big data & out of memory ! ; TRDOS 8086
   229                              <1> ERR_CLUSTER	   equ 35 ; 'cluster not available !' ; TRDOS 8086
   230                              <1> ERR_OUT_OF_MEMORY  equ  4 ; 'out of memory !'
   231                              <1> 			  ; 'insufficient memory !'
   232                              <1> ERR_P_VIOLATION	   equ	6 ; 'protection violation !'
   233                              <1> ERR_PAGE_FAULT	   equ 224 ;'page fault !' ;0E0h						 
   234                              <1> ERR_SWP_DISK_READ  	   equ 40
   235                              <1> ERR_SWP_DISK_NOT_PRESENT   equ 41
   236                              <1> ERR_SWP_SECTOR_NOT_PRESENT equ 42
   237                              <1> ERR_SWP_NO_FREE_SPACE      equ 43
   238                              <1> ERR_SWP_DISK_WRITE         equ 44
   239                              <1> ERR_SWP_NO_PAGE_TO_SWAP    equ 45
   240                              <1> ; 10/04/2017
   241                              <1> ERR_BUFFER	   equ 46  ; 'buffer error !'
   242                              <1> ; 28/08/2017 (20/08/2017)
   243                              <1> ERR_DMA		   equ -1  ; DMA buffer (allocation/misc.) error!
   244                              <1> 
   245                              <1> ; 26/08/2015
   246                              <1> ; 24/07/2015
   247                              <1> ; 24/06/2015
   248                              <1> MAX_ARG_LEN	   equ 256 ; max. length of sys exec arguments
   249                              <1> ; 01/07/2015
   250                              <1> MAX_MSG_LEN	   equ 255 ; max. msg length for 'sysmsg'
   251                              <1> ;	
   252                              <1> ; 06/10/2016
   253                              <1> ;OPENFILES	   equ 10  ; max. number of open files (system)
   254                              <1> ; 23/07/2022
   255                              <1> OPENFILES	   equ 32  ; max. number of open files (system)
   256                              <1> ; 07/10/2016
   257                              <1> ;NUMOFDEVICES	   equ 20  ; max. num of available devices (sys)
   258                              <1> 			 		
  3306                                  %include 'trdosk0.s' ; 04/01/2016 
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.0) - DEFINITIONS : trdosk0.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 29/02/2016
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 04/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.11 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Derived from TRDOS Operating System v1.0 (8086) source code by Erdogan Tan
    11                              <1> ; TRDOS2.ASM (09/11/2011)
    12                              <1> ; ****************************************************************************
    13                              <1> ; TRDOS2.ASM (c) 2004-2011 Erdogan TAN [ 17/01/2004 ] Last Update: 09/11/2011
    14                              <1> ;
    15                              <1> ; Masterboot / Partition Table at Beginning+1BEh
    16                              <1> ptBootable       equ 0
    17                              <1> ptBeginHead      equ 1
    18                              <1> ptBeginSector    equ 2
    19                              <1> ptBeginCylinder  equ 3
    20                              <1> ptFileSystemID   equ 4
    21                              <1> ptEndHead        equ 5
    22                              <1> ptEndSector      equ 6
    23                              <1> ptEndCylinder    equ 7
    24                              <1> ptStartSector    equ 8
    25                              <1> ptSectors        equ 12
    26                              <1> 
    27                              <1> ; Boot Sector Parameters at 7C00h
    28                              <1> DataArea1     equ -4
    29                              <1> DataArea2     equ -2
    30                              <1> BootStart     equ 0h
    31                              <1> OemName       equ 03h
    32                              <1> BytesPerSec   equ 0Bh
    33                              <1> SecPerClust   equ 0Dh
    34                              <1> ResSectors    equ 0Eh
    35                              <1> FATs          equ 10h
    36                              <1> RootDirEnts   equ 11h
    37                              <1> Sectors       equ 13h
    38                              <1> Media         equ 15h
    39                              <1> FATSecs       equ 16h
    40                              <1> SecPerTrack   equ 18h
    41                              <1> Heads         equ 1Ah 
    42                              <1> Hidden1       equ 1Ch
    43                              <1> Hidden2       equ 1Eh
    44                              <1> HugeSec1      equ 20h
    45                              <1> HugeSec2      equ 22h
    46                              <1> DriveNumber   equ 24h
    47                              <1> Reserved1     equ 25h
    48                              <1> bootsignature equ 26h                 
    49                              <1> VolumeID      equ 27h
    50                              <1> VolumeLabel   equ 2Bh
    51                              <1> FileSysType   equ 36h          
    52                              <1> Reserved2     equ 3Eh                           ; Starting cluster of P2000
    53                              <1> 
    54                              <1> ; FAT32 BPB Structure
    55                              <1> FAT32_FAT_Size equ 36
    56                              <1> FAT32_RootFClust equ 44
    57                              <1> FAT32_FSInfoSec equ 48
    58                              <1> FAT32_DrvNum equ 64
    59                              <1> FAT32_BootSig equ 66
    60                              <1> FAT32_VolID equ 67
    61                              <1> FAT32_VolLab equ 71
    62                              <1> FAT32_FilSysType equ 82
    63                              <1> 
    64                              <1> ; BIOS Disk Parameters
    65                              <1> DPDiskNumber  equ 0h
    66                              <1> DPDType       equ 1h
    67                              <1> DPReturn      equ 2h
    68                              <1> DPHeads       equ 3h
    69                              <1> DPCylinders   equ 4h
    70                              <1> DPSecPerTrack equ 6h
    71                              <1> DPDisks       equ 7h
    72                              <1> DPTableOff    equ 8h
    73                              <1> DPTableSeg    equ 0Ah
    74                              <1> DPNumOfSecs   equ 0Ch
    75                              <1> 
    76                              <1> ; BIOS INT 13h Extensions (LBA extensions)
    77                              <1> ; Just After DP Data (DPDiskNumber+)
    78                              <1> DAP_PacketSize equ 10h  ; If extensions present, this byte will be >=10h
    79                              <1> DAP_Reserved1 equ 11h   ; Reserved Byte 
    80                              <1> DAP_NumOfBlocks equ 12h ; Value of this byte must be 0 to 127
    81                              <1> DAP_Reserved2 equ 13h   ; Reserved Byte
    82                              <1> DAP_Destination equ 14h ; Address of Transfer Buffer as SEGMENT:OFFSET
    83                              <1> DAP_LBA_Address equ 18h ; LBA=(C1*H0+H1)*S0+S1-1
    84                              <1>                         ; C1= Selected Cylinder Number
    85                              <1>                         ; H0= Number Of Heads (Maximum Head Number + 1)
    86                              <1>                         ; H1= Selected Head Number
    87                              <1>                         ; S0= Maximum Sector Number
    88                              <1>                         ; S1= Selected Sector Number
    89                              <1>                         ; QUAD WORD
    90                              <1> ; DAP_Flat_Destination equ 20h ; 64 bit address, if value in 4h is FFFF:FFFFh
    91                              <1>                              ; QUAD WORD (Also, value in 0h must be 18h) 
    92                              <1>                              ; TR-DOS will not use 64 bit Flat Address
    93                              <1> 
    94                              <1> ; INT 13h Function 48h "Get Enhanced Disk Drive Parameters"
    95                              <1> ; Just After DP Data (DPDiskNumber+)
    96                              <1> GetDParams_48h equ 20h ; Word. Data Length, must be 26 (1Ah) for short data.
    97                              <1> GDP_48h_InfoFlag equ 22h ; Word
    98                              <1> ; Bit 1 = 1 -> The geometry returned in bytes 4-15 is valid.
    99                              <1> GDP_48h_NumOfPCyls equ 24h ; Double Word. Number physical cylinders.
   100                              <1> GDP_48h_NumOfPHeads equ 28h ; Double Word. Number of physical heads.
   101                              <1> GDP_48h_NumOfPSpT equ 2Ch ; Double word. Num of physical sectors per track.
   102                              <1> GDP_48h_LBA_Sectors equ 30h ; 8 bytes. Number of physical/LBA sectors.
   103                              <1> GDP_48h_BytesPerSec equ 38h ; Word. Number of bytes in a sector.
   104                              <1> 
   105                              <1> ; TR-DOS Standalone Program Extensions to the DiskParams Block
   106                              <1> ; Just After DP Data (DPDiskNumber+)
   107                              <1> TRDP_CurrentSector equ 3Ah  ; DX:AX (LBA)
   108                              <1> TRDP_SectorCount equ 3Eh    ; CX (or Counter)
   109                              <1> 
   110                              <1> 
   111                              <1> ; DOS Logical Disks
   112                              <1> LD_Name equ 0
   113                              <1> LD_DiskType equ 1
   114                              <1> LD_PhyDrvNo equ 2
   115                              <1> LD_FATType equ 3
   116                              <1> LD_FSType equ 4
   117                              <1> LD_LBAYes equ 5
   118                              <1> LD_BPB equ 6
   119                              <1> LD_FATBegin equ 96
   120                              <1> LD_ROOTBegin equ 100
   121                              <1> LD_DATABegin equ 104
   122                              <1> LD_StartSector equ 108
   123                              <1> LD_TotalSectors equ 112
   124                              <1> LD_FreeSectors equ 116
   125                              <1> LD_Clusters equ 120
   126                              <1> LD_PartitionEntry equ 124
   127                              <1> LD_DParamEntry equ 125
   128                              <1> LD_MediaChanged equ 126
   129                              <1> LD_CDirLevel equ 127
   130                              <1> LD_CurrentDirectory equ 128
   131                              <1> 
   132                              <1> ; Singlix FS Extensions to DOS Logical Disks
   133                              <1> ; 03/01/2010 (LD_BPB compatibility for CHS r/w)
   134                              <1> 
   135                              <1> LD_FS_Name equ 0
   136                              <1> LD_FS_DiskType equ 1
   137                              <1> LD_FS_PhyDrvNo equ 2
   138                              <1> LD_FS_FATType equ 3
   139                              <1> LD_FS_FSType equ 4
   140                              <1> LD_FS_LBAYes equ 5
   141                              <1> LD_FS_BPB equ 6
   142                              <1> LD_FS_MediaAttrib equ 6
   143                              <1> LD_FS_VersionMajor equ 7
   144                              <1> LD_FS_RootDirD equ 8
   145                              <1> LD_FS_MATLocation equ 12
   146                              <1> LD_FS_Reserved1 equ 16 ;1 reserved byte
   147                              <1> LD_FS_BytesPerSec equ 17 ; LD_BPB + 0Bh
   148                              <1> LD_FS_Reserved2 equ 19 ;2 reserved byte
   149                              <1> LD_FS_DATLocation equ 20
   150                              <1> LD_FS_DATSectors equ 24
   151                              <1> LD_FS_Reserved3 equ 28 ;3 reserved word
   152                              <1> LD_FS_SecPerTrack equ 30 ; LD_BPB + 18h
   153                              <1> LD_FS_NumHeads equ 32    ; LD_BPB + 1Ah
   154                              <1> LD_FS_UnDelDirD equ 34
   155                              <1> LD_FS_Reserved4 equ 38 ;4 reserved word
   156                              <1> LD_FS_VolumeSerial equ 40
   157                              <1> LD_FS_VolumeName equ 44
   158                              <1> LD_FS_BeginSector equ 108
   159                              <1> LD_FS_VolumeSize equ 112
   160                              <1> LD_FS_FreeSectors equ 116
   161                              <1> LD_FS_FirstFreeSector equ 120
   162                              <1> LD_FS_PartitionEntry equ 124
   163                              <1> LD_FS_DParamEntry equ 125
   164                              <1> LD_FS_MediaChanged equ 126
   165                              <1> LD_FS_CDirLevel equ 127
   166                              <1> LD_FS_CDIR_Converted equ 128
   167                              <1> 
   168                              <1> ; Valid FAT Types
   169                              <1> FS_FAT12 equ 1
   170                              <1> FS_FAT16_CHS equ 2
   171                              <1> FS_FAT32_CHS equ 3
   172                              <1> FS_FAT16_LBA equ 4
   173                              <1> FS_FAT32_LBA equ 5
   174                              <1> 
   175                              <1> ; Cursor Location
   176                              <1> CCCpointer equ  0450h   ; BIOS data, current cursor column
   177                              <1> ; FAT Clusters EOC sign
   178                              <1> FAT12EOC equ 0FFFh
   179                              <1> FAT16EOC equ 0FFFFh
   180                              <1> ;FAT32EOC equ 0FFFFFFFh ; It is not direct usable for 8086 code
   181                              <1> ; BAD Cluster
   182                              <1> FAT12BADC equ 0FF7h
   183                              <1> FAT16BADC equ 0FFF7h
   184                              <1> ;FAT32BADC equ 0FFFFFF7h ; It is not direct usable for 8086 code
   185                              <1> ; MS-DOS FAT16 FS (Maximum Possible) Last Cluster Number= 0FFF6h 
   186                              <1> 
   187                              <1> ; TRFS
   188                              <1> 
   189                              <1> bs_FS_JmpBoot equ 0 ; jmp short bsBootCode
   190                              <1>                 ; db 0EBh, db 3Fh, db 90h
   191                              <1> bs_FS_Identifier equ 3  ; db 'FS', db 0
   192                              <1> bs_FS_BytesPerSec equ 6 ; dw 512
   193                              <1> bs_FS_MediaAttrib equ 8 ; db 3
   194                              <1> bs_FS_PartitionID equ 9 ; db 0A1h
   195                              <1> bs_FS_VersionMaj equ 10 ; db 01h
   196                              <1> bs_FS_VersionMin equ 11 ; db 0
   197                              <1> bs_FS_BeginSector equ 12   ; dd 0 
   198                              <1> bs_FS_VolumeSize equ 16 ; dd 2880
   199                              <1> bs_FS_StartupFD equ 20 ; dd 0
   200                              <1> bs_FS_MATLocation equ 24 ; dd 1
   201                              <1> bs_FS_RootDirD equ 28 ; dd 8
   202                              <1> bs_FS_SystemConfFD equ 32 ; dd 0
   203                              <1> bs_FS_SwapFD equ 36 ; dd 0
   204                              <1> bs_FS_UnDelDirD equ 40 ; dd 0
   205                              <1> bs_FS_DriveNumber equ 44 ; db 0
   206                              <1> bs_FS_LBA_Ready equ 45 ; db 0
   207                              <1> bs_FS_MagicWord equ 46 
   208                              <1> bs_FS_SecPerTrack equ 46 ; db 0A1h
   209                              <1> bs_FS_Heads equ 47 ; db 01h 
   210                              <1> bs_FS_OperationSys equ 48 ; db "TR-SINGLIX v1.0b"
   211                              <1> bs_FS_Terminator equ 64 ; db 0
   212                              <1> bs_FS_BootCode equ 65 
   213                              <1> 
   214                              <1> FS_MAT_DATLocation equ 12
   215                              <1> FS_MAT_DATScount equ 16
   216                              <1> FS_MAT_FreeSectors equ 20
   217                              <1> FS_MAT_FirstFreeSector equ 24
   218                              <1> FS_RDT_VolumeSerialNo equ 28
   219                              <1> FS_RDT_VolumeName equ 64
   220                              <1> 
   221                              <1> ; FAT12 + FAT16 + FAT32
   222                              <1> BS_JmpBoot equ 0
   223                              <1> BS_OEMName equ 3
   224                              <1> BPB_BytsPerSec equ 11
   225                              <1> BPB_SecPerClust equ 13
   226                              <1> BPB_RsvdSecCnt equ 14
   227                              <1> BPB_NumFATs equ 16
   228                              <1> BPB_RootEntCnt equ 17
   229                              <1> BPB_TotalSec16 equ 19
   230                              <1> BPB_Media equ 21
   231                              <1> BPB_FATSz16 equ 22
   232                              <1> BPB_SecPerTrk equ 24
   233                              <1> BPB_NumHeads equ 26
   234                              <1> BPB_HiddSec equ 28
   235                              <1> BPB_TotalSec32 equ 32
   236                              <1> 
   237                              <1> ; FAT12 and FAT16 only
   238                              <1> BS_DrvNum equ 36
   239                              <1> BS_Reserved1 equ 37
   240                              <1> BS_BootSig equ 38
   241                              <1> BS_VolID equ 39
   242                              <1> BS_VolLab equ 43
   243                              <1> BS_FilSysType equ 54 ; 8 bytes
   244                              <1> BS_BootCode equ 62
   245                              <1> 
   246                              <1> ; FAT32 only
   247                              <1> BPB_FATSz32 equ 36 ; FAT32, 4 bytes
   248                              <1> BPB_ExtFlags equ 40 ; FAT32, 2 bytes
   249                              <1> BPB_FSVer equ 42 ; FAT32, 2 bytes
   250                              <1> BPB_RootClus equ 44 ; FAT32, 4 bytes
   251                              <1> BPB_FSInfo equ 48 ; FAT 32, 2 bytes 
   252                              <1> BPB_BkBootSec equ 50 ; FAT32, 2 bytes
   253                              <1> BPB_Reserved equ 52 ; FAT32, 12 bytes
   254                              <1> BS_FAT32_DrvNum equ 64 ; FAT32, 1 byte
   255                              <1> BS_FAT32_Reserved1 equ 65 ; FAT32, 1 byte
   256                              <1> BS_FAT32_BootSig equ 66 ; FAT32, 1 byte
   257                              <1> BS_FAT32_VolID equ 67 ; FAT32, 4 bytes
   258                              <1> BS_FAT32_VolLab equ 71 ; FAT32, 11 bytes
   259                              <1> BS_FAT32_FilSysType equ 82 ; FAT32, 8 bytes
   260                              <1> BS_FAT32_BootCode equ 90
   261                              <1> 
   262                              <1> ; 29/02/2016
   263                              <1> ;(FAT32 Free Cluster Count & First Free Cluster values)
   264                              <1> ;[BPB_Reserved] = Free Cluster Count (offset 52)
   265                              <1> ;[BPB_Reserved+4] = First Free Cluster (offset 56)
   266                              <1> 
   267                              <1> BS_Validation equ 510
   268                              <1> 
   269                              <1> ; 15/02/2016
   270                              <1> ; FILE.ASM - 09/10/2011
   271                              <1> ; Directory Entry Structure
   272                              <1> ; 29/10/2009 (According to Microsoft FAT32 File System Specification)
   273                              <1> DirEntry_Name equ 0
   274                              <1> DirEntry_Attr equ 11
   275                              <1> DirEntry_NTRes equ 12
   276                              <1> DirEntry_CrtTimeTenth equ 13
   277                              <1> DirEntry_CrtTime equ 14
   278                              <1> DirEntry_CrtDate equ 16
   279                              <1> DirEntry_LastAccDate equ 18
   280                              <1> DirEntry_FstClusHI equ 20
   281                              <1> DirEntry_WrtTime equ 22
   282                              <1> DirEntry_WrtDate equ 24
   283                              <1> DirEntry_FstClusLO equ 26
   284                              <1> DirEntry_FileSize equ 28
  3307                                  %include 'trdosk1.s' ; 04/01/2016 
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.5) - SYS INIT : trdosk1.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 25/07/2022 (Previous: 18/04/2021)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 04/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Derived from TRDOS Operating System v1.0 (8086) source code by Erdogan Tan
    11                              <1> ; TRDOS2.ASM (09/11/2011)
    12                              <1> ; ****************************************************************************
    13                              <1> ; TRDOS2.ASM (c) 2004-2011 Erdogan TAN [ 17/01/2004 ] Last Update: 09/11/2011
    14                              <1> ;
    15                              <1> 
    16                              <1> sys_init:
    17                              <1> 	; 18/04/2021 (TRDOS 386 v2.0.4) 
    18                              <1> 	; 20/01/2018  (v2.0.1)
    19                              <1> 	; 23/01/2017  (v2.0.0)
    20                              <1> 	; 07/05/2016
    21                              <1> 	; 02/05/2016
    22                              <1> 	; 24/04/2016
    23                              <1> 	; 14/04/2016
    24                              <1> 	; 13/04/2016
    25                              <1> 	; 30/03/2016
    26                              <1> 	; 24/01/2016
    27                              <1> 	; 06/01/2016
    28                              <1> 	; 04/01/2016 (TRDOS 386 v2.0 - Beginning)
    29                              <1> 
    30                              <1> 	; 23/01/2017 - reset timer frequency (to 18.2Hz)
    31 00006B8A B036                <1> 	mov	al, 00110110b ; 36h
    32 00006B8C E643                <1>  	out	43h, al
    33 00006B8E 31C0                <1> 	xor	eax, eax  ; sub	al, al ; 0
    34 00006B90 E640                <1> 	out	40h, al ; LB
    35 00006B92 E640                <1> 	out	40h, al ; HB
    36                              <1>  	; 
    37                              <1> 	; 30/03/2016
    38                              <1> 	; Clear Logical DOS Disk Description Tables Area
    39                              <1> 	;xor	eax, eax
    40 00006B94 BF00010900          <1> 	mov	edi, Logical_DOSDisks
    41 00006B99 B980060000          <1> 	mov	ecx, 6656/4 ; 26*256 = 6656 bytes
    42 00006B9E F3AB                <1> 	rep	stosd ; 1664 times 4 bytes
    43                              <1> 
    44 00006BA0 B83F3A2F00          <1> 	mov	eax, '?:/'
    45 00006BA5 A3[0B780100]        <1> 	mov	[Current_Dir_Drv], eax
    46                              <1> 
    47                              <1> 	; Logical DRV INIT (only for hard disks)
    48 00006BAA E8F1030000          <1> 	call 	ldrv_init  ; trdosk2.s
    49                              <1> 	
    50                              <1> 	; When floppy_drv_init call is disabled
    51                              <1> 	; media changed sign is needed
    52                              <1> 	; for proper drive initialization
    53                              <1>         
    54 00006BAF BE00010900          <1> 	mov 	esi, Logical_DOSDisks
    55 00006BB4 B001                <1> 	mov 	al, 1 ; Initialization sign (invalid_fd_parameter)
    56 00006BB6 83C67E              <1> 	add 	esi, LD_MediaChanged ; Media Change Status = 1 (init needed)
    57 00006BB9 8806                <1> 	mov 	[esi], al ; A:
    58 00006BBB 81C600010000        <1> 	add 	esi, 100h 
    59 00006BC1 8806                <1> 	mov 	[esi], al ; B: 
    60                              <1>            
    61                              <1> _current_drive_bootdisk:
    62 00006BC3 8A15[78650000]      <1> 	mov 	dl, [boot_drv] ; physical drive number
    63 00006BC9 80FAFF              <1> 	cmp 	dl, 0FFh
    64 00006BCC 740A                <1> 	je 	short _last_dos_diskno_check
    65                              <1> _boot_drive_check:
    66 00006BCE 80FA80              <1> 	cmp 	dl, 80h
    67 00006BD1 7218                <1> 	jb 	short _current_drive_a
    68 00006BD3 80EA7E              <1> 	sub 	dl, 7Eh ; C = 2 , D = 3
    69 00006BD6 EB13                <1> 	jmp 	short _current_drive_a 
    70                              <1> 
    71                              <1> _last_dos_diskno_check:
    72 00006BD8 8A15[BE2F0100]      <1> 	mov 	dl, [Last_DOS_DiskNo]
    73 00006BDE 80FA02              <1> 	cmp 	dl, 2
    74 00006BE1 7706                <1> 	ja 	short _current_drive_c
    75 00006BE3 7406                <1> 	je 	short _current_drive_a
    76 00006BE5 30D2                <1> 	xor 	dl, dl ; A:
    77 00006BE7 EB02                <1> 	jmp 	short _current_drive_a
    78                              <1> 
    79                              <1> _current_drive_c:
    80 00006BE9 B202                <1> 	mov 	dl, 2 ; C:
    81                              <1> 
    82                              <1> _current_drive_a:
    83 00006BEB 8815[79650000]      <1> 	mov	[drv], dl
    84 00006BF1 BE[C02F0100]        <1>         mov     esi, msg_CRLF_temp
    85 00006BF6 E8AF000000          <1> 	call 	print_msg
    86                              <1> 
    87 00006BFB 8A15[79650000]      <1> 	mov	dl, [drv]
    88                              <1> _default_drive_c:
    89 00006C01 E8DC0B0000          <1> 	call 	change_current_drive
    90 00006C06 731C                <1> 	jnc 	short _start_mainprog
    91                              <1> 
    92                              <1> _drv_not_ready_error: 
    93 00006C08 BE[83320100]        <1> 	mov 	esi, msgl_drv_not_ready
    94 00006C0D E898000000          <1> 	call 	print_msg
    95                              <1>         ;jmp	_end_of_mainprog
    96                              <1> 
    97                              <1> 	; 20/01/2018
    98 00006C12 B202                <1> 	mov	dl, 2
    99 00006C14 3815[79650000]      <1> 	cmp	[drv], dl
   100 00006C1A 736C                <1> 	jnb	short _end_of_mainprog
   101 00006C1C 8815[79650000]      <1> 	mov	[drv], dl
   102 00006C22 EBDD                <1> 	jmp	short _default_drive_c
   103                              <1> 
   104                              <1> _start_mainprog:
   105                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   106                              <1> 	; 18/04/2021 (TRDOS 386 v2.0.4 - Beginning) 
   107                              <1> 	; 07/01/2017
   108                              <1> 	; 07/05/2016
   109                              <1> 	; 02/05/2016
   110                              <1> 	; 24/04/2016 (TRDOS 386 v2)
   111                              <1> 	; Retro UNIX 386 v1, 'sys_init' (u0.s)
   112                              <1> 	; 23/06/2015
   113                              <1> 
   114                              <1> 	; 02/05/2016
   115                              <1> 	; 24/04/2016
   116                              <1> 	;mov	ax, 1
   117                              <1> 	; 18/04/2021 - TRDOS 386 v2.0.4
   118 00006C24 31C0                <1> 	xor	eax, eax
   119 00006C26 FEC0                <1> 	inc	al  ; eax = 1
   120 00006C28 A2[6D010300]        <1> 	mov	[u.uno], al
   121 00006C2D 66A3[04010300]      <1> 	mov	[mpid], ax
   122 00006C33 66A3[00000300]      <1> 	mov	[p.pid], ax
   123 00006C39 A2[60000300]        <1> 	mov	[p.stat], al
   124 00006C3E C605[64010300]04    <1> 	mov	byte [u.quant], time_count  ; 07/01/2017
   125                              <1> 	;
   126 00006C45 A1[48770100]        <1> 	mov	eax, [k_page_dir]
   127 00006C4A A3[74010300]        <1> 	mov	[u.pgdir], eax ; reset
   128                              <1> 	;
   129 00006C4F E89FEAFFFF          <1> 	call	allocate_page
   130                              <1> 	;jc	panic
   131                              <1> 	; 25/07/2022
   132 00006C54 7305                <1> 	jnc	short _start_mainprog_1
   133 00006C56 E9AE000000          <1> 	jmp	panic
   134                              <1> 
   135                              <1> _start_mainprog_1:
   136 00006C5B A3[70010300]        <1> 	mov	[u.upage], eax ; user structure page	
   137 00006C60 A3[70000300]        <1> 	mov	[p.upage], eax
   138 00006C65 E8FAEAFFFF          <1> 	call	clear_page
   139                              <1> 	;
   140                              <1> 	; 24/08/2015
   141 00006C6A FE0D[10010300]      <1> 	dec 	byte [sysflg] ; FFh = ready for system call
   142                              <1> 			      ; 0 = executing a system call
   143                              <1> 	; 13/04/2016
   144                              <1> 	; Clear Environment Variables Page/Area
   145 00006C70 BF00300900          <1> 	mov	edi, Env_Page ; 93000h
   146 00006C75 B980000000          <1> 	mov	ecx, Env_Page_Size / 4	; 512/4  (4096/4)				 	  		 	  
   147 00006C7A 31C0                <1> 	xor	eax, eax
   148 00006C7C F3AB                <1> 	rep	stosd
   149                              <1> 
   150                              <1> 	; 14/04/2016
   151 00006C7E E810330000          <1>  	call	mainprog_startup_configuration
   152                              <1> 
   153 00006C83 E8970C0000          <1>         call    dos_prompt
   154                              <1>               
   155                              <1> _end_of_mainprog:
   156 00006C88 BE[C02F0100]        <1>         mov     esi, msg_CRLF_temp
   157 00006C8D E818000000          <1> 	call 	print_msg
   158 00006C92 BE[C62F0100]        <1> 	mov 	esi, mainprog_Version
   159 00006C97 E80E000000          <1> 	call 	print_msg
   160                              <1> 	; 24/01/2016
   161 00006C9C 28E4                <1> 	sub	ah, ah
   162 00006C9E E855A2FFFF          <1> 	call	int16h ; call getch
   163 00006CA3 E9E3A6FFFF          <1> 	jmp	cpu_reset
   164                              <1> 
   165 00006CA8 EBFE                <1> infinitiveloop: jmp short infinitiveloop
   166                              <1> 
   167                              <1> print_msg:
   168                              <1> 	; 13/05/2016
   169                              <1> 	; 04/01/2016
   170                              <1> 	; 01/07/2015
   171                              <1> 	; 13/03/2015 (Retro UNIX 386 v1)
   172                              <1> 	; 07/03/2014 (Retro UNIX 8086 v1)
   173                              <1> 	; (Modified registers: EAX, EBX, ECX, EDX, ESI, EDI)
   174                              <1> 	;
   175 00006CAA 8A3D[76770100]      <1> 	mov	bh, [ACTIVE_PAGE] ; 04/01/2016 (ptty)
   176                              <1> 	;mov	bl, 07h ; Black background, light gray forecolor
   177                              <1> 
   178 00006CB0 AC                  <1> 	lodsb
   179                              <1> pmsg1:
   180 00006CB1 56                  <1> 	push 	esi
   181                              <1> 	;mov	bh, [ACTIVE_PAGE] ; 04/01/2016 (ptty)
   182 00006CB2 B307                <1> 	mov	bl, 07h ; Black background, light gray forecolor
   183 00006CB4 E8B8B5FFFF          <1> 	call 	_write_tty
   184 00006CB9 5E                  <1> 	pop	esi
   185 00006CBA AC                  <1> 	lodsb
   186 00006CBB 20C0                <1> 	and 	al, al
   187 00006CBD 75F2                <1> 	jnz 	short pmsg1
   188 00006CBF C3                  <1> 	retn
   189                              <1> 
   190                              <1> clear_screen:
   191                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   192                              <1> 	; 06/12/2020 
   193                              <1> 	; 03/12/2020 (TRDOS 386 v2.0.3)
   194                              <1> 	; 13/05/2016
   195                              <1> 	; 30/01/2016
   196                              <1> 	; 24/01/2016
   197                              <1> 	; 04/01/2016
   198 00006CC0 0FB61D[76770100]    <1> 	movzx	ebx, byte [ACTIVE_PAGE] ; video page number (0 to 7)
   199                              <1> 	; 25/07/2022
   200                              <1> 	;sub	al, al
   201                              <1> 	; al = 0
   202 00006CC7 8AA3[2F670000]      <1> 	mov 	ah, [ebx+vmode] ; default = 03h (80x25 text)
   203 00006CCD 80FC04              <1> 	cmp	ah, 4
   204 00006CD0 7205                <1> 	jb	short cls1
   205 00006CD2 80FC07              <1> 	cmp	ah, 7
   206 00006CD5 752B                <1> 	jne	short vga_clear
   207                              <1> cls1:
   208                              <1> 	;mov	bh, bl
   209                              <1> 	;mov	bl, 7
   210 00006CD7 3A25[1E670000]      <1> 	cmp	ah, [CRT_MODE] ; current video mode ? 
   211 00006CDD 740D                <1> 	je	short cls2 ; yes (current video mode = 3)
   212                              <1> 	;;call	set_mode_3 ; set video mode to 3 (& clear screen)
   213                              <1> 	;;retn
   214                              <1> 	; 06/12/2020
   215                              <1> 	;cmp	byte [pmi32], 0
   216                              <1> 	; 25/07/2022
   217 00006CDF 383D[D00F0300]      <1> 	cmp	[pmi32], bh ; 0
   218 00006CE5 771B                <1> 	ja	short vga_clear 	
   219 00006CE7 E98FB5FFFF          <1> 	jmp	set_mode_3
   220                              <1> cls2:
   221 00006CEC 88DF                <1> 	mov	bh, bl ; video page (0 to 7)
   222 00006CEE B307                <1> 	mov	bl, 07h ; attribute to be used on blanked line
   223                              <1> 	; 25/07/2022
   224                              <1> 	;sub 	al, al ; 0 = entire window
   225                              <1> 	;xor 	cx, cx
   226                              <1> 	; 25/07/2022
   227                              <1> 	; al = 0
   228 00006CF0 31C9                <1> 	xor	ecx, ecx
   229 00006CF2 66BA4F18            <1> 	mov 	dx, 184Fh
   230 00006CF6 E8C8B2FFFF          <1> 	call	_scroll_up ; 24/01/2016
   231                              <1> 	;
   232                              <1> 	;mov	bh, [ACTIVE_PAGE] ; video page number (0 to 7)
   233                              <1> 	;xor 	dx, dx
   234                              <1> 	; 25/07/2022
   235 00006CFB 31D2                <1> 	xor	edx, edx
   236                              <1> 	;call	_set_cpos ; 24/01/2016 
   237                              <1> 	;;retn
   238                              <1> 	; 03/12/2020
   239 00006CFD E907B6FFFF          <1> 	jmp	_set_cpos ; returns to the caller of this proc
   240                              <1> ;cls3:
   241                              <1> ;	retn
   242                              <1> 
   243                              <1> 	; 06/12/2020
   244                              <1> vga_clear:
   245                              <1> 	; 03/12/2020
   246                              <1> 	; set mode by using _int10h
   247                              <1> 	; (also clears screen)
   248                              <1> 	;mov	al, ah
   249                              <1> 	;sub	ah, ah  ; set current video mode
   250                              <1> 	; 25/07/2022
   251 00006D02 86E0                <1> 	xchg	ah, al
   252                              <1> 	; ah = 0
   253                              <1> 	; al = video mode
   254                              <1> 	;call	_int10h ; simulates int 10h in TRDOS 386 kernel
   255                              <1> 	;jmp	short cls3
   256 00006D04 E9F7A9FFFF          <1> 	jmp	_int10h ; returns to the caller of this proc
   257                              <1> 
   258                              <1> panic:
   259                              <1> 	; 13/05/2016 (TRDOS 386 = TRDOS v2)
   260                              <1> 	; 13/03/2015 (Retro UNIX 386 v1)
   261                              <1> 	; 07/03/2014 (Retro UNIX 8086 v1)
   262 00006D09 BE[733A0100]        <1> 	mov 	esi, panic_msg
   263 00006D0E E897FFFFFF          <1> 	call 	print_msg
   264                              <1> key_to_reboot:
   265                              <1>         ; 24/01/2016
   266 00006D13 28E4                <1>         sub     ah, ah
   267 00006D15 E8DEA1FFFF          <1>         call    int16h	; call getch
   268                              <1>         ; wait for a character from the current tty
   269                              <1> 	;
   270 00006D1A B00A                <1> 	mov	al, 0Ah
   271 00006D1C 8A3D[76770100]      <1> 	mov	bh, [ptty] ; [ACTIVE_PAGE]
   272 00006D22 B307                <1> 	mov	bl, 07h ; Black background, 
   273                              <1> 			; light gray forecolor
   274 00006D24 E848B5FFFF          <1> 	call 	_write_tty
   275 00006D29 E95DA6FFFF          <1> 	jmp	cpu_reset 
   276                              <1> 
   277                              <1> ctrlbrk:
   278                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   279                              <1> 	; 12/11/2015
   280                              <1> 	; 13/03/2015 (Retro UNIX 386 v1)
   281                              <1> 	; 06/12/2013 (Retro UNIX 8086 v1)
   282                              <1> 	;
   283                              <1> 	; INT 1Bh (control+break) handler		
   284                              <1> 	;
   285                              <1>       	; Retro Unix 8086 v1 feature only!
   286                              <1>       	;
   287                              <1> 	
   288                              <1> 	; 25/07/2022
   289 00006D2E 52                  <1> 	push	edx
   290 00006D2F 31D2                <1> 	xor	edx, edx
   291                              <1> 	;cmp 	word [u.intr], 0
   292 00006D31 663915[68010300]    <1> 	cmp	[u.intr], dx ; 0
   293 00006D38 763D                <1> 	jna 	short cbrk4
   294                              <1> cbrk0:
   295                              <1> 	; 12/11/2015
   296                              <1> 	; 06/12/2013
   297                              <1> 	;cmp 	word [u.quit], 0
   298 00006D3A 663915[6A010300]    <1> 	cmp	[u.quit], dx ; 0 ; 25/07/2022
   299 00006D41 7434                <1> 	jz	short cbrk4
   300                              <1> 	
   301                              <1> 	; 20/09/2013	
   302                              <1> 	;push 	ax
   303 00006D43 50                  <1> 	push	eax ; 25/07/2022
   304 00006D44 A0[76770100]        <1> 	mov	al, [ptty]
   305                              <1> 	
   306                              <1> 	; 12/11/2015
   307                              <1> 	;
   308                              <1> 	; ctrl+break (EOT, CTRL+D) from serial port
   309                              <1> 	; or ctrl+break from console (pseudo) tty
   310                              <1> 	; (!redirection!)
   311                              <1> 	
   312 00006D49 3C08                <1> 	cmp	al, 8 ; serial port tty nums > 7
   313 00006D4B 720E                <1>         jb      short cbrk1 ; console (pseudo) tty
   314                              <1> 		
   315                              <1> 	; Serial port interrupt handler sets [ptty]
   316                              <1> 	; to the port's tty number (as temporary).
   317                              <1> 	;
   318                              <1> 	; If active process is using a stdin or 
   319                              <1> 	; stdout redirection (by the shell),
   320                              <1>         ; console tty keyboard must be available
   321                              <1> 	; to terminate running process,
   322                              <1> 	; in order to prevent a deadlock. 
   323                              <1> 
   324                              <1> 	; 25/07/2022
   325                              <1> 	;push	edx
   326                              <1> 	;movzx	edx, byte [u.uno]
   327 00006D4D 8A15[6D010300]      <1> 	mov	dl, [u.uno]
   328 00006D53 3A82[3F000300]      <1> 	cmp     al, [edx+p.ttyc-1] ; console tty (rw)
   329                              <1> 	;pop	edx
   330 00006D59 7412                <1> 	je	short cbrk2
   331                              <1> cbrk1:
   332 00006D5B FEC0                <1> 	inc 	al  ; [u.ttyp] : 1 based tty number
   333                              <1> 	; 06/12/2013
   334 00006D5D 3A05[50010300]      <1> 	cmp	al, [u.ttyp]   ; recent open tty (r)
   335 00006D63 7408                <1> 	je	short cbrk2	
   336 00006D65 3A05[51010300]      <1>         cmp     al, [u.ttyp+1] ; recent open tty (w)
   337 00006D6B 7509                <1> 	jne	short cbrk3	
   338                              <1> cbrk2:
   339                              <1> 	;; 06/12/2013
   340                              <1> 	;mov	ax, [u.quit]
   341                              <1> 	;and	ax, ax
   342                              <1> 	;jz	short cbrk3
   343                              <1> 	
   344                              <1> 	;xor	ax, ax ; 0
   345                              <1> 	;dec	ax
   346                              <1> 	; 0FFFFh = 'ctrl+brk' keystroke
   347                              <1> 	; 25/07/2022
   348 00006D6D 31C0                <1> 	xor	eax, eax ; 0
   349 00006D6F 48                  <1> 	dec	eax ; -1 ; 0FFFFFFFFh
   350 00006D70 66A3[6A010300]      <1> 	mov	[u.quit], ax
   351                              <1> cbrk3:
   352                              <1> 	;pop	ax
   353 00006D76 58                  <1> 	pop	eax ; 25/07/2022
   354                              <1> cbrk4:
   355                              <1> 	; 25/07/2022
   356 00006D77 5A                  <1> 	pop	edx
   357 00006D78 C3                  <1> 	retn
   358                              <1> 
   359                              <1> ; 31/12/2017
   360                              <1> ; TRDOS 386 - 30/12/2017
   361                              <1> %define get_rtc_date RTC_40
   362                              <1> %define get_rtc_time RTC_20
   363                              <1> %define	set_rtc_date RTC_50
   364                              <1> %define set_rtc_time RTC_30	
   365                              <1> get_rtc_date_time:
   366                              <1> ; Retro UNIX 8086 v1 - UNIX.ASM (01/09/2014)
   367                              <1> ;epoch:
   368                              <1> 	; 18/04/2021 (TRDOS 386 v2.0.3)
   369                              <1> 	; 30/12/2017 (TRDOS 386 = TRDOS v2.0)
   370                              <1> 	; 15/03/2015 (Retro UNIX 386 v1 - 32 bit version)
   371                              <1> 	; 09/04/2013 (Retro UNIX 8086 v1 - UNIX.ASM)
   372                              <1> 	; 'epoch' procedure prototype: 
   373                              <1> 	; 	            UNIXCOPY.ASM, 10/03/2013
   374                              <1> 	; 14/11/2012
   375                              <1> 	; unixboot.asm (boot file configuration)
   376                              <1> 	; version of "epoch" procedure in "unixproc.asm"
   377                              <1> 	; 21/7/2012
   378                              <1> 	; 15/7/2012
   379                              <1> 	; 14/7/2012		
   380                              <1> 	; Erdogan Tan - RETRO UNIX v0.1
   381                              <1> 	; compute current date and time as UNIX Epoch/Time
   382                              <1> 	; UNIX Epoch: seconds since 1/1/1970 00:00:00
   383                              <1> 	;
   384                              <1>         ;  ((Modified registers: EAX, EDX, ECX, EBX))  
   385                              <1> 	;
   386                              <1> 
   387                              <1> 	; 18/04/2021
   388                              <1> 	; INPUT:
   389                              <1> 	;	none (real time clock)
   390                              <1> 	; OUTPUT:
   391                              <1> 	;	eax = unix epoch time value
   392                              <1> 	;	    (seconds since 1/1/1970 00:00:00)
   393                              <1> 
   394 00006D79 E8CBF4FFFF          <1> 	call 	get_rtc_time		; Return Current Time
   395                              <1>         ;xchg 	ch, cl ; 18/04/2021
   396 00006D7E 66890D[12740100]    <1>         mov 	[hour], cx    ; BCD, cl = minute, ch = hour
   397                              <1>         ;xchg 	dh, dl ; 18/04/2021
   398                              <1> 	;mov 	[second], dx  ; BCD, dh = second, dl = dse
   399                              <1> 	; 18/04/2021
   400 00006D85 8835[16740100]      <1> 	mov	[second], dh  ; second
   401                              <1> 	;
   402 00006D8B E824F5FFFF          <1>         call 	get_rtc_date		; Return Current Date
   403                              <1>         ;xchg 	ch, cl ; 18/04/2021
   404 00006D90 66890D[0C740100]    <1>         mov 	[year], cx    ; BCD, cl = year, ch = century
   405                              <1>         ;xchg 	dh, dl ; 18/04/2021
   406 00006D97 668915[0E740100]    <1>         mov 	[month], dx   ; BCD, dl = day, dh = month
   407                              <1> 	;
   408                              <1> 	;mov 	al, [hour]    ; Hour
   409                              <1>         ; 18/04/2021
   410 00006D9E A0[13740100]        <1> 	mov	al, [hour+1]  ; Hour
   411                              <1> 	   	; AL <-- BCD number
   412 00006DA3 D410                <1>         db 	0D4h, 10h		; Undocumented inst. AAM
   413                              <1> 					; AH = AL / 10h
   414                              <1> 					; AL = AL MOD 10h
   415 00006DA5 D50A                <1>         aad 	; AX= AH*10+AL
   416                              <1> 	;mov 	[hour], al
   417                              <1> 	;mov 	al, [hour+1]  ; Minute
   418 00006DA7 8605[12740100]      <1> 	xchg	al, [hour]    ; [hour] = hour, al = minute
   419                              <1> 	   	; AL <-- BCD number
   420 00006DAD D410                <1>         db 	0D4h, 10h		; Undocumented inst. AAM
   421                              <1> 					; AH = AL / 10h
   422                              <1> 					; AL = AL MOD 10h
   423 00006DAF D50A                <1>         aad 	; AX= AH*10+AL
   424 00006DB1 A2[14740100]        <1> 	mov 	[minute], al
   425 00006DB6 A0[16740100]        <1> 	mov 	al, [second]  ; Second
   426                              <1> 	   	; AL <-- BCD number
   427 00006DBB D410                <1>         db 	0D4h, 10h		; Undocumented inst. AAM
   428                              <1> 					; AH = AL / 10h
   429                              <1> 					; AL = AL MOD 10h
   430 00006DBD D50A                <1>         aad 	; AX= AH*10+AL
   431 00006DBF A2[16740100]        <1> 	mov 	[second], al
   432 00006DC4 66A1[0C740100]      <1> 	mov 	ax, [year]    ; Year (century)
   433                              <1> 	; 18/04/2021
   434                              <1> 	;push 	eax ; puhs ax
   435                              <1> 	;mov	al, ah ; century ; 18/04/2021
   436                              <1> 	   	; AL <-- BCD number
   437 00006DCA D410                <1>         db 	0D4h, 10h		; Undocumented inst. AAM
   438                              <1> 					; AH = AL / 10h
   439                              <1> 					; AL = AL MOD 10h
   440 00006DCC D50A                <1>         aad 	; AX= AH*10+AL
   441                              <1> 	;mov 	ah, 100
   442                              <1> 	;mul 	ah
   443                              <1> 	;mov 	[year], ax
   444                              <1> 	; 18/04/2021
   445                              <1> 	; ax = al = year (0 to 99)
   446 00006DCE 668705[0C740100]    <1> 	xchg	ax, [year]    ; [year+1] = century -> ah
   447                              <1> 	;pop	eax ; pop ax
   448 00006DD5 88E0                <1> 	mov	al, ah  ; century
   449                              <1> 	   	; AL <-- BCD number
   450 00006DD7 D410                <1>         db 	0D4h, 10h		; Undocumented inst. AAM
   451                              <1> 					; AH = AL / 10h
   452                              <1> 					; AL = AL MOD 10h
   453 00006DD9 D50A                <1>         aad 	; AX= AH*10+AL
   454                              <1> 	; 18/04/2021
   455 00006DDB B464                <1> 	mov	ah, 100	      ; 100*(century byte of year)
   456 00006DDD F6E4                <1> 	mul	ah
   457                              <1> 	;
   458 00006DDF 660105[0C740100]    <1> 	add 	[year], ax
   459                              <1> 	;mov 	al, [month]   ; Month
   460                              <1> 	; 18/04/2021
   461 00006DE6 A0[0F740100]        <1> 	mov	al, [month+1] ; Month
   462                              <1> 	   	; AL <-- BCD number
   463 00006DEB D410                <1>         db 	0D4h, 10h		; Undocumented inst. AAM
   464                              <1> 					; AH = AL / 10h
   465                              <1> 					; AL = AL MOD 10h
   466 00006DED D50A                <1>         aad 	; AX= AH*10+AL
   467                              <1> 	;mov 	[month], al	
   468                              <1>         ;mov	al, [month+1] ; Day
   469                              <1> 	; 18/04/2021
   470 00006DEF 8605[0E740100]      <1> 	xchg	al, [month]   ; [month] = month, al = day
   471                              <1> 	   	; AL <-- BCD number
   472 00006DF5 D410                <1>         db 	0D4h, 10h		; Undocumented inst. AAM
   473                              <1> 					; AH = AL / 10h
   474                              <1> 					; AL = AL MOD 10h
   475 00006DF7 D50A                <1>         aad 	; AX= AH*10+AL
   476 00006DF9 A2[10740100]        <1>         mov     [day], al
   477                              <1> 	
   478 00006DFE C3                  <1> 	retn	; 30/12/2017
   479                              <1> 
   480                              <1> epoch:
   481 00006DFF E875FFFFFF          <1> 	call	get_rtc_date_time ; TRDOS 386 - 30/12/2017
   482                              <1> 
   483                              <1> convert_to_epoch:
   484                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   485                              <1> 	; 31/12/2017 (TRDOS 386 = TRDOS v2.0)
   486                              <1> 	; 15/03/2015 (Retro UNIX 386 v1 - 32 bit modification)
   487                              <1> 	; 09/04/2013 (Retro UNIX 8086 v1)
   488                              <1> 	;
   489                              <1> 	; ((Modified registers: EAX, EDX, EBX)) 
   490                              <1> 	;
   491                              <1> 	; Derived from DALLAS Semiconductor
   492                              <1> 	; Application Note 31 (DS1602/DS1603)
   493                              <1> 	; 6 May 1998
   494 00006E04 29C0                <1> 	sub 	eax, eax
   495 00006E06 66A1[0C740100]      <1> 	mov 	ax, [year]
   496 00006E0C 662DB207            <1> 	sub 	ax, 1970
   497 00006E10 BA6D010000          <1> 	mov 	edx, 365
   498 00006E15 F7E2                <1> 	mul 	edx
   499 00006E17 31DB                <1> 	xor 	ebx, ebx
   500 00006E19 8A1D[0E740100]      <1> 	mov 	bl, [month]
   501 00006E1F FECB                <1> 	dec 	bl
   502 00006E21 D0E3                <1> 	shl 	bl, 1
   503                              <1> 	;sub	edx, edx
   504 00006E23 668B93[18740100]    <1> 	mov 	dx, [EBX+DMonth]
   505 00006E2A 8A1D[10740100]      <1>         mov     bl, [day]
   506 00006E30 FECB                <1> 	dec 	bl
   507 00006E32 01D0                <1> 	add 	eax, edx
   508 00006E34 01D8                <1> 	add 	eax, ebx
   509                              <1> 			; EAX = days since 1/1/1970
   510 00006E36 668B15[0C740100]    <1> 	mov 	dx, [year]
   511 00006E3D 6681EAB107          <1> 	sub 	dx, 1969
   512                              <1> 	;shr 	dx, 1
   513                              <1> 	;shr 	dx, 1
   514                              <1> 	; 25/07/2022
   515 00006E42 C1EA02              <1> 	shr	edx, 2		
   516                              <1> 		; (year-1969)/4
   517 00006E45 01D0                <1> 	add 	eax, edx
   518                              <1> 			; + leap days since 1/1/1970
   519 00006E47 803D[0E740100]02    <1> 	cmp 	byte [month], 2	; if past february
   520 00006E4E 760E                <1> 	jna 	short cte1
   521 00006E50 668B15[0C740100]    <1> 	mov 	dx, [year]
   522 00006E57 6683E203            <1> 	and 	dx, 3 ; year mod 4
   523 00006E5B 7501                <1> 	jnz 	short cte1		
   524                              <1> 			; and if leap year
   525                              <1> 	;add 	eax, 1 	; add this year's leap day (february 29)
   526                              <1> 	; 25/07/2022
   527 00006E5D 40                  <1> 	inc	eax
   528                              <1> cte1: 			; compute seconds since 1/1/1970
   529 00006E5E BA18000000          <1> 	mov 	edx, 24
   530 00006E63 F7E2                <1> 	mul	edx
   531 00006E65 8A15[12740100]      <1> 	mov 	dl, [hour]
   532 00006E6B 01D0                <1> 	add 	eax, edx
   533                              <1> 		; EAX = hours since 1/1/1970 00:00:00
   534                              <1> 	;mov	ebx, 60
   535 00006E6D B33C                <1> 	mov	bl, 60
   536 00006E6F F7E3                <1> 	mul	ebx
   537 00006E71 8A15[14740100]      <1> 	mov 	dl, [minute]
   538 00006E77 01D0                <1> 	add 	eax, edx
   539                              <1> 		; EAX = minutes since 1/1/1970 00:00:00
   540                              <1> 	;mov 	ebx, 60
   541 00006E79 F7E3                <1> 	mul	ebx
   542 00006E7B 8A15[16740100]      <1> 	mov 	dl, [second]
   543 00006E81 01D0                <1> 	add 	eax, edx
   544                              <1>  		; EAX -> seconds since 1/1/1970 00:00:00
   545 00006E83 C3                  <1> 	retn
   546                              <1> 
   547                              <1> ;set_date_time:
   548                              <1> convert_from_epoch:
   549                              <1> 	; 25/07/2022 (v2.0.5)
   550                              <1> 	; 18/04/2021 (v2.0.4)
   551                              <1> 	; 31/12/2017 (v2.0.0)
   552                              <1> 	; 30/12/2017 (TRDOS 386 = TRDOS v2.0)
   553                              <1> 	; 15/03/2015 (Retro UNIX 386 v1 - 32 bit version)
   554                              <1> 	; 20/06/2013 (Retro UNIX 8086 v1)
   555                              <1> 	; 'convert_from_epoch' procedure prototype: 
   556                              <1> 	; 	            UNIXCOPY.ASM, 10/03/2013
   557                              <1> 	;
   558                              <1> 	; ((Modified registers: EAX, EDX, ECX, EBX))	
   559                              <1> 	;
   560                              <1> 	; Derived from DALLAS Semiconductor
   561                              <1> 	; Application Note 31 (DS1602/DS1603)
   562                              <1> 	; 6 May 1998
   563                              <1> 	;
   564                              <1> 	; INPUT:
   565                              <1> 	; EAX = Unix (Epoch) Time
   566                              <1> 	;
   567 00006E84 31D2                <1> 	xor 	edx, edx
   568                              <1> 	;mov 	ecx, 60
   569                              <1> 	; 25/07/2022
   570 00006E86 29C9                <1> 	sub	ecx, ecx
   571 00006E88 B13C                <1> 	mov	cl, 60
   572 00006E8A F7F1                <1> 	div	ecx
   573                              <1> 	;mov 	[imin], eax   ; whole minutes
   574                              <1> 			  ; since 1/1/1970
   575 00006E8C 668915[16740100]    <1> 	mov 	[second], dx  ; leftover seconds
   576 00006E93 29D2                <1> 	sub 	edx, edx
   577 00006E95 F7F1                <1> 	div	ecx
   578                              <1> 	;mov 	[ihrs], eax   ; whole hours
   579                              <1> 	;		      ; since 1/1/1970
   580 00006E97 668915[14740100]    <1> 	mov 	[minute], dx  ; leftover minutes
   581 00006E9E 31D2                <1> 	xor	edx, edx
   582                              <1> 	;mov 	cx, 24
   583 00006EA0 B118                <1> 	mov 	cl, 24
   584 00006EA2 F7F1                <1> 	div	ecx
   585                              <1> 	;mov 	[iday], ax   ; whole days
   586                              <1> 			     ; since 1/1/1970
   587 00006EA4 668915[12740100]    <1> 	mov 	[hour], dx   ; leftover hours
   588 00006EAB 05DB020000          <1> 	add 	eax, 365+366 ; whole day since
   589                              <1> 			     ; 1/1/1968 	
   590                              <1> 	;mov 	[iday], ax
   591 00006EB0 50                  <1> 	push 	eax
   592 00006EB1 29D2                <1> 	sub	edx, edx
   593                              <1> 	;mov 	ecx, (4*365)+1 ; 4 years = 1461 days
   594                              <1> 	; 25/07/2022
   595 00006EB3 66B9B505            <1> 	mov	cx, (4*365)+1
   596 00006EB7 F7F1                <1> 	div	ecx
   597 00006EB9 59                  <1> 	pop 	ecx
   598                              <1> 	;mov 	[lday], ax   ; count of quadyrs (4 years)
   599                              <1> 	;push 	dx
   600                              <1> 	; 18/04/2021
   601 00006EBA 52                  <1> 	push	edx
   602                              <1> 	;mov 	[qday], dx   ; days since quadyr began
   603 00006EBB 6683FA3C            <1> 	cmp 	dx, 31+29    ; if past feb 29 then
   604 00006EBF F5                  <1> 	cmc		     ; add this quadyr's leap day
   605 00006EC0 83D000              <1> 	adc 	eax, 0	     ; to # of qadyrs (leap days)
   606                              <1> 	;mov 	[lday], ax   ; since 1968			  
   607                              <1> 	;mov 	cx, [iday]
   608 00006EC3 91                  <1> 	xchg 	ecx, eax     ; ECX = lday, EAX = iday		  
   609 00006EC4 29C8                <1> 	sub 	eax, ecx     ; iday - lday
   610                              <1> 	;mov 	ecx, 365
   611                              <1> 	; 25/07/2022
   612 00006EC6 66B96D01            <1> 	mov	cx, 365
   613 00006ECA 31D2                <1> 	xor	edx, edx
   614                              <1> 	; EAX = iday-lday, EDX = 0
   615 00006ECC F7F1                <1> 	div	ecx
   616                              <1> 	;mov 	[iyrs], ax   ; whole years since 1968
   617                              <1> 	;jday = iday - (iyrs*365) - lday
   618                              <1> 	;mov	[jday], dx   ; days since 1/1 of current year
   619                              <1> 	;add	eax, 1968
   620 00006ECE 6605B007            <1> 	add 	ax, 1968     ; compute year
   621 00006ED2 66A3[0C740100]      <1> 	mov 	[year], ax
   622                              <1> 	;mov 	cx, dx
   623                              <1> 	; 25/07/2022
   624 00006ED8 89D1                <1> 	mov	ecx, edx
   625                              <1> 	;;mov 	dx, [qday]
   626                              <1> 	;pop 	dx
   627                              <1> 	; 18/04/2021
   628 00006EDA 5A                  <1> 	pop	edx
   629 00006EDB 6681FA6D01          <1> 	cmp 	dx, 365	     ; if qday <= 365 and qday >= 60	
   630 00006EE0 7708                <1> 	ja 	short cfe1   ; jday = jday +1
   631 00006EE2 6683FA3C            <1> 	cmp 	dx, 60       ; if past 2/29 and leap year then
   632 00006EE6 F5                  <1>         cmc		     ; add a leap day to the # of whole
   633                              <1> 	;adc 	cx, 0        ; days since 1/1 of current year
   634                              <1> 	; 25/07/2022
   635 00006EE7 83D100              <1> 	adc	ecx, 0
   636                              <1> cfe1:			
   637                              <1> 	;mov 	[jday], cx
   638                              <1> 	;mov 	bx, 12       ; estimate month
   639                              <1> 	; 18/04/2021
   640 00006EEA 29DB                <1> 	sub	ebx, ebx
   641 00006EEC B30C                <1> 	mov	bl, 12
   642 00006EEE 66BA6E01            <1> 	mov 	dx, 366      ; mday, max. days since 1/1 is 365
   643 00006EF2 6683E003            <1> 	and 	ax, 11b      ; year mod 4 (and dx, 3) 
   644                              <1> cfe2:	; Month calculation  ; 0 to 11  (11 to 0)	
   645                              <1> 	;cmp 	cx, dx       ; mday = # of days passed from 1/1
   646                              <1> 	; 25/07/2022
   647 00006EF6 39D1                <1> 	cmp	ecx, edx 
   648 00006EF8 731B                <1> 	jnb 	short cfe3
   649                              <1> 	;dec 	bx           ; month = month - 1
   650                              <1> 	;shl 	bx, 1
   651                              <1> 	; 18/04/2021
   652 00006EFA FECB                <1> 	dec	bl
   653 00006EFC D0E3                <1> 	shl	bl, 1 
   654 00006EFE 668B93[18740100]    <1> 	mov 	dx, [EBX+DMonth] ; # elapsed days at 1st of month
   655                              <1> 	; 18/04/2021
   656                              <1> 	;shr 	bx, 1        ; bx = month - 1 (0 to 11)
   657 00006F05 D0EB                <1> 	shr	bl, 1
   658                              <1> 	;cmp	bx, 1        ; if month > 2 and year mod 4  = 0	
   659 00006F07 80FB01              <1> 	cmp	bl, 1
   660 00006F0A 76EA                <1> 	jna 	short cfe2   ; then mday = mday + 1
   661 00006F0C 76E8                <1> 	jna 	short cfe2   ; then mday = mday + 1
   662 00006F0E 08C0                <1> 	or 	al, al       ; if past 2/29 and leap year then
   663 00006F10 75E4                <1> 	jnz 	short cfe2   ; add leap day (to mday)
   664                              <1> 	;inc 	dx           ; mday = mday + 1
   665                              <1> 	; 25/07/2022
   666 00006F12 42                  <1> 	inc	edx
   667 00006F13 EBE1                <1> 	jmp 	short cfe2
   668                              <1> cfe3:
   669                              <1> 	;inc 	bx	     ; -> bx = month, 1 to 12
   670                              <1> 	; 18/04/2021
   671 00006F15 FEC3                <1> 	inc	bl
   672 00006F17 66891D[0E740100]    <1> 	mov 	[month], bx
   673                              <1> 	;sub 	cx, dx	     ; day = jday - mday + 1	
   674                              <1> 	; 25/07/2022
   675 00006F1E 29D1                <1> 	sub	ecx, edx
   676                              <1> 	;inc 	cx 			  
   677                              <1> 	; 18/04/2021
   678 00006F20 FEC1                <1> 	inc	cl
   679                              <1> 	;mov 	[day], cx
   680 00006F22 880D[10740100]      <1> 	mov	[day], cl	
   681                              <1> 
   682                              <1> 	; eax, ebx, ecx, edx is changed at return
   683                              <1> 	; output ->
   684                              <1> 	; [year], [month], [day], [hour], [minute], [second]
   685                              <1> 
   686 00006F28 C3                  <1> 	retn	; 31/12/2017 (TRDOS 386)
   687                              <1> 
   688                              <1> set_rtc_date_time:
   689                              <1> 	; 31/12/2017 (v2.0.0)
   690                              <1> 	; 30/12/2017 (TRDOS 386)
   691                              <1> 	; 15/03/2015 (Retro UNIX 386 v1 - 32 bit version)
   692                              <1> 	; 20/06/2013 (Retro UNIX 8086 v1)
   693 00006F29 E80F000000          <1> 	call	set_date_bcd
   694                              <1> 	; Set real-time clock date
   695 00006F2E E8A7F3FFFF          <1> 	call	set_rtc_date ; RTC_50
   696                              <1> 	; Set real-time clock time
   697 00006F33 E832000000          <1> 	call	set_time_bcd
   698 00006F38 E93AF3FFFF          <1> 	jmp	set_rtc_time ; RTC_30	
   699                              <1> 
   700                              <1> ; 31/12/2017
   701                              <1> set_date_bcd:
   702 00006F3D A0[0D740100]        <1>         mov     al, [year+1]
   703 00006F42 D40A                <1> 	aam 	; ah = al / 10, al = al mod 10
   704 00006F44 D510                <1> 	db 	0D5h, 10h    ; Undocumented inst. AAD
   705                              <1> 			     ; AL = AH * 10h + AL
   706 00006F46 88C5                <1> 	mov 	ch, al ; century (BCD)
   707 00006F48 A0[0C740100]        <1> 	mov 	al, [year]
   708 00006F4D D40A                <1> 	aam 	; ah = al / 10, al = al mod 10
   709 00006F4F D510                <1> 	db 	0D5h, 10h    ; Undocumented inst. AAD
   710                              <1> 			     ; AL = AH * 10h + AL
   711 00006F51 88C1                <1> 	mov 	cl, al ; year (BCD)
   712 00006F53 A0[0E740100]        <1>         mov 	al, [month]
   713 00006F58 D40A                <1> 	aam 	; ah = al / 10, al = al mod 10
   714 00006F5A D510                <1> 	db 	0D5h, 10h    ; Undocumented inst. AAD
   715                              <1> 			     ; AL = AH * 10h + AL
   716 00006F5C 88C6                <1> 	mov 	dh, al ; month (BCD)
   717 00006F5E A0[10740100]        <1> 	mov 	al, [day]
   718 00006F63 D40A                <1> 	aam 	; ah = al / 10, al = al mod 10
   719 00006F65 D510                <1> 	db 	0D5h, 10h    ; Undocumented inst. AAD
   720                              <1> 			     ; AL = AH * 10h + AL
   721                              <1> 	; 18/04/2021
   722 00006F67 88C2                <1> 	mov 	dl, al ; day (BCD)
   723 00006F69 C3                  <1> 	retn	; 30/12/2017
   724                              <1> 
   725                              <1> ; 31/12/2017
   726                              <1> set_time_bcd:
   727                              <1>         ; Read real-time clock time 
   728                              <1> 	; (get day light saving time bit status)
   729 00006F6A FA                  <1>  	cli
   730 00006F6B E8A5F4FFFF          <1> 	call	UPD_IPR 		; CHECK FOR UPDATE IN PROCESS
   731                              <1> 	; cf = 1 -> al = 0
   732 00006F70 7207                <1>         jc      short stime1
   733 00006F72 B00B                <1> 	mov	al, CMOS_REG_B		; ADDRESS ALARM REGISTER
   734 00006F74 E8D2F4FFFF          <1> 	call	CMOS_READ		; READ CURRENT VALUE OF DSE BIT
   735                              <1> stime1:
   736 00006F79 FB                  <1> 	sti
   737 00006F7A 2401                <1> 	and	al, 00000001b		; MASK FOR VALID DSE BIT
   738 00006F7C 88C2                <1> 	mov	dl, al			; SET [DL] TO ZERO FOR NO DSE BIT
   739                              <1> 	; DL = 1 or 0 (day light saving time)
   740                              <1> 	;	
   741 00006F7E A0[12740100]        <1> 	mov 	al, [hour]
   742 00006F83 D40A                <1> 	aam 	; ah = al / 10, al = al mod 10
   743 00006F85 D510                <1> 	db 	0D5h,10h     ; Undocumented inst. AAD
   744                              <1> 			     ; AL = AH * 10h + AL
   745 00006F87 88C5                <1> 	mov 	ch, al ; hour (BCD)
   746 00006F89 A0[14740100]        <1>         mov     al, [minute]
   747 00006F8E D40A                <1> 	aam 	; ah = al / 10, al = al mod 10
   748 00006F90 D510                <1> 	db 	0D5h,10h     ; Undocumented inst. AAD
   749                              <1> 			     ; AL = AH * 10h + AL
   750 00006F92 88C1                <1> 	mov 	cl, al       ; minute (BCD)
   751 00006F94 A0[16740100]        <1>         mov     al, [second]
   752 00006F99 D40A                <1> 	aam 	; ah = al / 10, al = al mod 10
   753 00006F9B D510                <1> 	db 	0D5h,10h     ; Undocumented inst. AAD
   754                              <1> 			     ; AL = AH * 10h + AL
   755 00006F9D 88C6                <1> 	mov 	dh, al	     ; second (BCD)
   756 00006F9F C3                  <1> 	retn	; 30/12/2017
  3308                                  %include 'trdosk2.s' ; 04/01/2016
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.6) - DRV INIT : trdosk2.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 29/08/2023 (Previous: 30/07/2022)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 04/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.14 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Derived from TRDOS Operating System v1.0 (8086) source code by Erdogan Tan
    11                              <1> ; TRDOS2.ASM (09/11/2011)
    12                              <1> ; ****************************************************************************
    13                              <1> ; DRV_INIT.ASM (c) 2009-2011 Erdogan TAN  [26/09/2009] Last Update: 07/08/2011
    14                              <1> ;
    15                              <1> 
    16                              <1> ldrv_init: ; Logical Drive Initialization
    17                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
    18                              <1> 	; 30/08/2020
    19                              <1> 	; 25/08/2020
    20                              <1> 	; 11/08/2020 - 13/08/2020
    21                              <1> 	; 17/07/2020 - 20/07/2020
    22                              <1> 	; 14/07/2020 - 15/07/2020
    23                              <1> 	; 30/01/2018
    24                              <1> 	; 27/12/2017
    25                              <1> 	; 12/02/2016
    26                              <1> 	; 06/01/2016
    27                              <1> 	;  	('diskinit.inc', 'diskio.inc' integration)
    28                              <1> 	; 04/01/2016 (TRDOS 386 = TRDOS v2.0)
    29                              <1> 	; 07/08/2011
    30                              <1> 	; 20/09/2009
    31                              <1> 	; 2005
    32                              <1> 
    33                              <1> 	; 15/07/2020
    34                              <1> 	;movzx	ecx, byte [HF_NUM] ; number of fixed disks
    35                              <1> 	;cmp	cl, 1
    36                              <1> 	;jnb	short load_hd_partition_tables
    37                              <1> 
    38 00006FA0 A0[E0770100]        <1> 	mov	al, [HF_NUM] ; number of fixed disks
    39 00006FA5 20C0                <1> 	and 	al, al
    40 00006FA7 7501                <1> 	jnz	short load_hd_partition_tables
    41                              <1> 
    42                              <1> 	; no any hard disks
    43 00006FA9 C3                  <1> 	retn			
    44                              <1> 
    45                              <1> load_hd_partition_tables:
    46                              <1> 	;mov	esi, [HDPM_TBL_VEC] ; primary master disk FDPT
    47                              <1> 	; 15/07/2020
    48 00006FAA BE[E4770100]        <1> 	mov	esi, HDPM_TBL_VEC
    49 00006FAF BF[0A7C0100]        <1> 	mov 	edi, PTable_hd0
    50 00006FB4 B280                <1> 	mov 	dl, 80h
    51                              <1> 	; 15/07/2020
    52 00006FB6 A2[7B650000]        <1> 	mov	[hdc], al
    53                              <1> 	;xor	ecx, ecx ; 0
    54                              <1> load_next_hd_partition_table:
    55                              <1> 	; 20/07/2020
    56 00006FBB 31C9                <1> 	xor	ecx, ecx ; 0
    57                              <1> 	;push	ecx
    58 00006FBD 57                  <1> 	push	edi ; *
    59                              <1> 	;push	esi ; FDPT (+ DPTE) address
    60                              <1> 	; 15/07/2020
    61 00006FBE AD                  <1> 	lodsd
    62 00006FBF 56                  <1> 	push	esi ; ** ; next FDPT (+ DPTE) address ptr
    63                              <1> 	
    64                              <1> 	;mov	al, [esi+20] ; DPTE offset 4
    65                              <1> 	;and	al, 40h ;  LBA bit (bit 6)
    66                              <1> 	;;shr	al, 6
    67                              <1> 	;mov 	[HD_LBA_yes], al
    68                              <1> 	
    69                              <1> 	; 15/07/2020
    70 00006FC0 8A4814              <1> 	mov	cl, [eax+20]
    71 00006FC3 80E140              <1> 	and	cl, 40h
    72 00006FC6 880D[0E7D0100]      <1> 	mov	[HD_LBA_yes], cl
    73                              <1> 	
    74 00006FCC E83F040000          <1> 	call	load_masterboot
    75                              <1> 	;jc	short pass_pt_this_hard_disk
    76                              <1> 	; 13/08/2020
    77                              <1> 	;jc	pass_pt_this_hard_disk
    78                              <1> 	; 25/07/2022
    79 00006FD1 7305                <1> 	jnc	short load_mbr_ok
    80 00006FD3 E98A000000          <1> 	jmp	pass_pt_this_hard_disk
    81                              <1> 
    82                              <1> load_mbr_ok:
    83 00006FD8 BB[C87B0100]        <1> 	mov	ebx, PartitionTable
    84 00006FDD 89DE                <1> 	mov	esi, ebx
    85                              <1> 	;mov	ecx, 16
    86 00006FDF B110                <1> 	mov	cl, 16
    87 00006FE1 F3A5                <1> 	rep 	movsd
    88 00006FE3 89DE                <1> 	mov 	esi, ebx 
    89                              <1> 	;mov 	byte [hdc], 4 ; 4 - partition index
    90                              <1> 	; 15/07/2020
    91 00006FE5 C605[0F7D0100]04    <1> 	mov	byte [PP_Counter], 4
    92                              <1> loc_validate_hdp_partition:
    93                              <1> 	;cmp 	byte [esi+ptFileSystemID], 0
    94                              <1> 	;jna	short loc_validate_next_hdp_partition2
    95                              <1> 	; 13/08/2020
    96 00006FEC 8A4604              <1> 	mov	al, [esi+ptFileSystemID]
    97 00006FEF 20C0                <1> 	and	al, al
    98 00006FF1 7457                <1> 	jz	short loc_validate_next_hdp_partition2
    99                              <1> 
   100 00006FF3 56                  <1> 	push	esi ; *** ; Masterboot partition table offset
   101 00006FF4 52                  <1> 	push	edx ; **** ; dl = Physical drive number
   102                              <1> 
   103                              <1> 	; 13/08/2020
   104 00006FF5 3C05                <1> 	cmp	al, 05h  ; Extended partition CHS
   105 00006FF7 7404                <1>  	je	short loc_set_ep_counter
   106 00006FF9 3C0F                <1> 	cmp	al, 0Fh  ; Extended partition LBA
   107 00006FFB 7511                <1>  	jne	short loc_validate_next_hdp_partition0
   108                              <1> 	
   109                              <1> 	;;inc	byte [PP_Counter]
   110                              <1> 	; 15/07/2020
   111                              <1> 	;inc 	byte [EP_Counter] ; disk has valid partition(s)
   112                              <1> 
   113                              <1> loc_set_ep_counter:
   114                              <1> 	; 13/08/2020
   115 00006FFD 803D[107D0100]80    <1> 	cmp	byte [EP_Counter], 80h
   116 00007004 7342                <1> 	jnb	short loc_validate_next_hdp_partition1
   117                              <1> 
   118 00007006 8815[107D0100]      <1> 	mov	byte [EP_Counter], dl ; disk drv has extd. part.
   119                              <1> 
   120 0000700C EB3A                <1> 	jmp	short loc_validate_next_hdp_partition1
   121                              <1> 
   122                              <1> loc_validate_next_hdp_partition0:
   123 0000700E 31FF                <1> 	xor	edi, edi ; 0  
   124                              <1> 	; Input -> ESI = PartitionTable offset
   125                              <1> 	; DL = Hard disk drive number 
   126                              <1> 	; EDI = 0 -> Primary Partition
   127                              <1> 	; EDI > 0 -> Extended Partition's Start Sector   
   128 00007010 E887010000          <1> 	call 	validate_hd_fat_partition
   129 00007015 730E                <1> 	jnc 	short loc_set_valid_hdp_partition_entry
   130                              <1> 
   131                              <1> 	;pop	edx
   132                              <1> 	;push	edx
   133 00007017 8B1424              <1> 	mov	edx, [esp]  ; ****
   134 0000701A 8B742404            <1> 	mov	esi, [esp+4] ; *** ; 30/01/2018
   135 0000701E E8CC020000          <1> 	call	validate_hd_fs_partition
   136 00007023 7223                <1> 	jc	short loc_validate_next_hdp_partition1
   137                              <1> loc_set_valid_hdp_partition_entry:
   138 00007025 8A0D[BE2F0100]      <1> 	mov 	cl, [Last_DOS_DiskNo] 
   139 0000702B 80C141              <1> 	add 	cl, 'A'
   140                              <1> 	; ESI = Logical dos drive description table address
   141 0000702E 880E                <1> 	mov	[esi+LD_Name], cl
   142                              <1> 	; 15/07/2020
   143 00007030 8A4602              <1> 	mov	al, [esi+LD_PhyDrvNo] ; Physical drive number
   144                              <1> 	;mov	al, [esp] ; ****
   145 00007033 2C7F                <1> 	sub	al, 7Fh
   146                              <1> 		; AL = 1 to 4	
   147 00007035 C0E002              <1> 	shl	al, 2 ; AL = 4 to 16
   148                              <1> 
   149 00007038 8A15[0F7D0100]      <1> 	mov	dl, [PP_Counter]
   150                              <1> 
   151                              <1> 	;sub	al, [PP_Counter]
   152 0000703E 28D0                <1> 	sub	al, dl ; [PP_Counter] ; 4 - partition index
   153                              <1> 
   154                              <1> 	; AL = Partition entry/index, 0 based
   155                              <1> 	;  0 -> hd 0, Partition Table offset = 0
   156                              <1> 	; 15 -> hd 3, Partition Table offset = 3
   157                              <1> 
   158                              <1> 	;mov	[esi+LD_PartitionEntry], al 
   159                              <1> 	
   160                              <1> 	; 15/07/2020
   161 00007040 B404                <1> 	mov	ah, 4
   162                              <1> 	;sub	ah, [PP_Counter]
   163 00007042 28D4                <1> 	sub	ah, dl
   164                              <1> 
   165                              <1> 	; AH = Primary partition index, 0 to 3 ; pt entry
   166                              <1> 	;		(4 to 7 for logical disk partitions)
   167                              <1> 
   168                              <1> 	;mov 	[esi+LD_DParamEntry], ah 
   169 00007044 6689467C            <1> 	mov 	[esi+LD_PartitionEntry], ax
   170                              <1> 
   171                              <1> loc_validate_next_hdp_partition1:
   172 00007048 5A                  <1> 	pop 	edx ; **** ; dl = Physical drive number 
   173 00007049 5E                  <1> 	pop	esi ; *** ; Masterboot partition table offset
   174                              <1> 
   175                              <1> loc_validate_next_hdp_partition2:
   176                              <1> 	; ESI = PartitionTable offset
   177                              <1> 	; DL = Hard/Fixed disk drive number
   178                              <1> 	
   179                              <1> 	;dec	byte [hdc] ; 4 - partition index
   180                              <1> 	;jz	short pass_pt_this_hard_disk
   181                              <1> 	; 15/07/2020
   182 0000704A FE0D[0F7D0100]      <1> 	dec	byte [PP_Counter] ; 4 - partition index
   183 00007050 7410                <1> 	jz	short pass_pt_this_hard_disk
   184                              <1> 	
   185 00007052 83C610              <1> 	add	esi, 16 ; 10h
   186 00007055 EB95                <1> 	jmp	short loc_validate_hdp_partition
   187                              <1> 
   188                              <1> loc_not_any_extd_partitions:
   189                              <1> 	; 15/07/2020
   190 00007057 C3                  <1> 	retn	
   191                              <1> 
   192                              <1> loc_next_hd_partition_table:
   193 00007058 FEC2                <1> 	inc	dl
   194                              <1> 	; 15/07/2020
   195                              <1> 	;add	esi, 32 ; next FDPT address
   196 0000705A 83C740              <1> 	add	edi, 64 ; next partition table destination
   197 0000705D E959FFFFFF          <1>         jmp     load_next_hd_partition_table
   198                              <1> 
   199                              <1> pass_pt_this_hard_disk:
   200                              <1> 	;pop	esi ; FDPT (+ DPTE) address
   201                              <1> 	; 15/07/2020
   202 00007062 5E                  <1> 	pop	esi ; ** ; next FDPT (+ DPTE) address ptr
   203 00007063 5F                  <1> 	pop	edi ; * ; Ptable_hd?
   204                              <1> 	;pop	ecx
   205                              <1> 	;loop	loc_next_hd_partition_table
   206 00007064 FE0D[7B650000]      <1> 	dec	byte [hdc]
   207 0000706A 75EC                <1> 	jnz	short loc_next_hd_partition_table
   208                              <1> 
   209                              <1> 	;cmp	byte [PP_Counter], 1
   210                              <1> 	;jnb	short load_extended_dos_partitions
   211                              <1> 	;; Empty partition table
   212                              <1> 	;retn
   213                              <1> 
   214                              <1> 	; 11/08/2020
   215                              <1> 	; 17/07/2020
   216                              <1> check_extended_partitions:
   217                              <1> 	; 15/07/2020
   218                              <1> 	;cmp	byte [EP_Counter], 0
   219                              <1> 	;jna	short loc_not_any_extd_partitions
   220                              <1> 	; 13/08/2020
   221 0000706C A0[107D0100]        <1> 	mov	al, [EP_Counter] ; 1st disk drv has extd partition
   222 00007071 08C0                <1> 	or	al, al ; 0 ?
   223 00007073 74E2                <1> 	jz	short loc_not_any_extd_partitions
   224                              <1> 
   225                              <1> load_extended_dos_partitions:
   226                              <1> 	;mov	byte [hdc], 80h
   227                              <1> 	; 13/08/2020
   228 00007075 A2[7B650000]        <1> 	mov	byte [hdc], al ; 1st disk drv has extd partition
   229                              <1> 	; 25/08/2020
   230 0000707A 2C80                <1> 	sub	al, 80h
   231 0000707C 740E                <1> 	jz	short loc_set_ext_ptable_hd0
   232 0000707E C0E006              <1> 	shl	al, 6 ; * 64
   233 00007081 0FB6F0              <1> 	movzx	esi, al
   234 00007084 81C6[0A7C0100]      <1> 	add	esi, PTable_hd0
   235 0000708A EB05                <1> 	jmp 	short next_hd_extd_partition
   236                              <1> 
   237                              <1> 	; 25/08/2020
   238                              <1> loc_set_ext_ptable_hd0:
   239 0000708C BE[0A7C0100]        <1> 	mov	esi, PTable_hd0
   240                              <1> 
   241                              <1> next_hd_extd_partition:
   242                              <1> 	; 17/07/2020
   243                              <1> 	;mov 	byte [EP_Counter], 0 ; Reset for each physical disk
   244                              <1> 	; 13/08/2020
   245                              <1> 	;mov	byte [LD_Counter], 0 ; Reset logical drive index
   246 00007091 66C705[107D0100]00- <1> 	mov 	word [EP_Counter], 0 ; Reset EP index and LD index	
   246 00007099 00                  <1>
   247                              <1> 
   248 0000709A 56                  <1> 	push	esi ; **** ; PTable_hd? offset
   249                              <1> 	
   250 0000709B C605[0F7D0100]04    <1> 	mov 	byte [PP_Counter], 4 
   251                              <1> 				; set for each extd partition table
   252                              <1> 	;;mov	ecx, 4
   253                              <1> 	;mov	cl, 4
   254 000070A2 8A15[7B650000]      <1> 	mov	dl, [hdc]
   255                              <1> hd_check_fs_id_05h:
   256 000070A8 8A4604              <1> 	mov	al, [esi+ptFileSystemID]
   257 000070AB 3C05                <1> 	cmp	al, 05h ; Is it an extended dos partition ?
   258 000070AD 7411                <1> 	je	short loc_set_ep_start_sector ; yes
   259                              <1> hd_check_fs_id_0Fh:
   260 000070AF 3C0F                <1> 	cmp	al, 0Fh ; Is it an extended win4 (LBA mode) partition ?
   261 000070B1 740D                <1> 	je	short loc_set_ep_start_sector ; yes
   262                              <1> 
   263                              <1> continue_to_check_ep:
   264                              <1> 	;add	esi, 16
   265                              <1> 	;loop	hd_check_fs_id_05h
   266                              <1> 	; 15/07/2020
   267                              <1> 	;dec	cl
   268                              <1> 	;jz	short continue_check_ep_next_disk
   269 000070B3 FE0D[0F7D0100]      <1> 	dec	byte [PP_Counter] ; 4 --> 0
   270 000070B9 742D                <1> 	jz	short continue_check_ep_next_disk
   271 000070BB 83C610              <1> 	add	esi, 16
   272 000070BE EBE8                <1> 	jmp	short hd_check_fs_id_05h
   273                              <1> 
   274                              <1> loc_set_ep_start_sector:
   275                              <1> 	; dl = [hdc] ; Drive number
   276                              <1> 	; 15/07/2020
   277 000070C0 8B4E08              <1> 	mov	ecx, [esi+ptStartSector]
   278                              <1> 	; 30/08/2020
   279 000070C3 890D[127D0100]      <1> 	mov	[MBR_EP_StartSector], ecx 
   280                              <1> 	; 20/07/2020
   281                              <1> loc_validate_hde_partition_next:
   282 000070C9 890D[167D0100]      <1> 	mov	[EP_StartSector], ecx ; Extended partition's start sector
   283 000070CF BB[0A7A0100]        <1>         mov	ebx, MasterBootBuff
   284 000070D4 803D[0E7D0100]01    <1> 	cmp	byte [HD_LBA_yes], 1 ; LBA ready = Yes
   285 000070DB 7227                <1> 	jb	short loc_hd_load_ep_05h ; cf = 1 ; 20/07/2020 
   286                              <1> 	; 11/08/2020
   287                              <1> 	; (BugFix for extended partition type 05h beyond CHS limit)
   288                              <1> 	; (Infact if extended partition starts at the beyond of CHS limit,
   289                              <1> 	;  it's partition ID must be 0Fh but they/somebodies had used 05h.)
   290                              <1> 	;cmp	al, 05h
   291                              <1> 	;je	short loc_hd_load_ep_05h
   292                              <1> loc_hd_load_ep_0Fh:
   293                              <1> 	; 04/01/2016
   294                              <1> 	;push	ecx
   295                              <1> 	; 15/07/2020
   296                              <1> 	;mov	ecx, [esi+ptStartSector] ; sector number
   297                              <1> 	;mov	ebx, MasterBootBuff ; buffer address
   298                              <1> 	; LBA read/write (with private LBA function) 
   299                              <1> 	;((Retro UNIX 386 v1 - DISK I/O code by Erdogan Tan))
   300                              <1> 	; dl = physical drive number (0,1, 80h, 81h, 82h, 83h)
   301                              <1> 	;mov	ah, 1Bh ; LBA read
   302                              <1> 	;mov	al, 1 ; sector count
   303 000070DD 66B8011B            <1> 	mov	ax, 1B01h
   304 000070E1 E8AFDEFFFF          <1> 	call	int13h
   305                              <1> 	;pop	ecx
   306                              <1> 	;jnc	short loc_hd_move_ep_table
   307                              <1> 	; 15/07/2020
   308 000070E6 732E                <1> 	jnc	short loc_validate_hde_partition
   309                              <1> 
   310                              <1> continue_check_ep_next_disk:
   311                              <1> 	; 15/07/2020
   312                              <1> 	;pop	edi ; PTable_ep?
   313 000070E8 5E                  <1> 	pop	esi ; **** ; PTable_hd?
   314 000070E9 A0[E0770100]        <1> 	mov	al, [HF_NUM] ; number of hard disks
   315 000070EE 047F                <1> 	add	al, 7Fh
   316 000070F0 3805[7B650000]      <1> 	cmp	[hdc], al
   317 000070F6 730B                <1> 	jnb	short loc_validating_hd_partitions_ok
   318 000070F8 83C640              <1> 	add	esi, 64
   319                              <1> 	; 15/07/2020
   320                              <1> 	;add	edi, 64
   321 000070FB FE05[7B650000]      <1> 	inc	byte [hdc]
   322 00007101 EB8E                <1> 	jmp	short next_hd_extd_partition
   323                              <1> 
   324                              <1> loc_validating_hd_partitions_ok:
   325                              <1> 	; 15/07/2020
   326                              <1> 	;mov	al, [Last_DOS_DiskNo]
   327                              <1> loc_drv_init_retn:
   328 00007103 C3                  <1> 	retn
   329                              <1> 	
   330                              <1> loc_hd_load_ep_05h:
   331                              <1> 	; 20/07/2020 ('diskio.s', int13h, cf = 1 -> bugfix)
   332                              <1> 	;clc    ; (Bug: int13h would not clear carry flag bit, 
   333                              <1> 	;	; even if there would not be an error)
   334                              <1> 	;	; ((Fix: now, int13h procedure clears carry flag
   335                              <1> 	;	;  at the entrance of it.. 20/07/2020))
   336                              <1> 	; 15/07/2020
   337                              <1> 	;push	ecx 
   338 00007104 8A7601              <1> 	mov	dh, [esi+ptBeginHead]
   339 00007107 668B4E02            <1>         mov     cx, [esi+ptBeginSector]
   340 0000710B 66B80102            <1> 	mov	ax, 0201h ; Read 1 sector
   341                              <1> 	;mov	ebx, MasterBootBuff
   342 0000710F E881DEFFFF          <1> 	call	int13h ; 20/07/2020
   343                              <1> 		       ; 'diskio.s' modification, 'clc'
   344                              <1> 	;pop	ecx  
   345 00007114 72D2                <1> 	jc	short continue_check_ep_next_disk
   346                              <1> 	; 15/07/2020
   347                              <1> 	;jmp	short loc_validate_hde_partition
   348                              <1> 
   349                              <1> 	; 15/07/2020
   350                              <1> ;loc_hd_move_ep_table:
   351                              <1> 	;;pop	edi
   352                              <1> 	;;push	edi  ; PTable_ep?
   353                              <1> 	;mov	edi, [esp]        
   354                              <1>         ;mov	esi, PartitionTable ; Extended
   355                              <1> 	;mov	ebx, esi
   356                              <1> 	;;mov	ecx, 16
   357                              <1> 	;mov	cl, 16
   358                              <1>        	;rep	movsd
   359                              <1> 	;mov	esi, ebx 
   360                              <1> ;loc_set_hde_sub_partition_count:
   361                              <1> 	;mov	byte [PP_Counter], 4
   362                              <1> 	;mov	byte [EP_Counter], 0
   363                              <1> 
   364                              <1> loc_validate_hde_partition:
   365                              <1> 	; 13/08/2020
   366                              <1> 	; 15/07/2020
   367                              <1> 	;mov	byte [PP_Counter], 4
   368 00007116 BE[C87B0100]        <1> 	mov	esi, PartitionTable ; (in MasterBootBuff)
   369                              <1> 	; 13/08/2020
   370                              <1> 	;jmp	short get_minidisk_partition_entry
   371                              <1> 
   372                              <1> ;get_minidisk_partition_entry:
   373                              <1> ;	; 20/07/2020
   374                              <1> ;	cmp	byte [esi+ptFileSystemID], 0
   375                              <1> ;	ja	short loc_validate_minidisk_partition
   376                              <1> ;	; 13/08/2020
   377                              <1> ;	jmp	short continue_check_ep_next_disk
   378                              <1> 
   379                              <1> ;	; 11/08/2020
   380                              <1> ;get_minidisk_partition_entry_next:
   381                              <1> ;	; 13/08/2020
   382                              <1> ;	;dec 	byte [PP_Counter]
   383                              <1> ;	;jz	short continue_check_ep_next_disk
   384                              <1> ;	; 20/07/2020
   385                              <1> ;;get_minidisk_partition_entry_next:
   386                              <1> ;	; 13/08/2020
   387                              <1> ;	cmp	esi, PartitionTable+64 
   388                              <1> ;	jnb	short continue_check_ep_next_disk
   389                              <1> ;	
   390                              <1> ;	add 	esi, 16 ; 10h
   391                              <1> ;	;jmp	short get_minidisk_partition_entry
   392                              <1> 
   393                              <1> 	; 13/08/2020
   394                              <1> get_minidisk_partition_entry:
   395                              <1> 	; 20/07/2020
   396 0000711B 807E0400            <1> 	cmp	byte [esi+ptFileSystemID], 0
   397 0000711F 76C7                <1> 	jna	short continue_check_ep_next_disk ; 13/08/2020
   398                              <1> 
   399                              <1> loc_validate_minidisk_partition:
   400                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   401                              <1> 	; 13/08/2020
   402                              <1> 	; 20/07/2020
   403                              <1> 	;push	esi ; *** ; Extended partition table offset
   404                              <1> 
   405                              <1> 	; 13/08/2020
   406 00007121 FE05[107D0100]      <1> 	inc	byte [EP_Counter] ; current (sub partition) index 
   407                              <1> 				  ; in current extended partition
   408                              <1> 
   409 00007127 BF[167D0100]        <1> 	mov	edi, EP_StartSector
   410                              <1> 
   411                              <1> 	; Input -> ESI = PartitionTable offset
   412                              <1> 	; DL = Hard disk drive number   
   413                              <1> 	; EDI = Extended partition start sector pointer
   414 0000712C E86B000000          <1> 	call	validate_hd_fat_partition
   415                              <1> 	;pop	ecx ; *
   416 00007131 7308                <1> 	jnc	short loc_set_valid_hde_partition_entry
   417                              <1> 			 ; jump down to deep !!!
   418                              <1> 
   419                              <1> 	;pop	esi ; *** ; Extended partition table offset
   420                              <1> 	; 13/08/2020
   421                              <1> 	;mov	esi, PartitionTable
   422                              <1> 
   423                              <1> 	; 11/08/2020
   424                              <1> 	; ESI = Extended partition table offset
   425 00007133 8A15[7B650000]      <1> 	mov	dl, [hdc]
   426                              <1> 
   427                              <1> 	;; DL = Hard disk drive number
   428                              <1> 	;dec	byte [PP_Counter]
   429                              <1> 	;jz	short continue_check_ep_next_disk
   430                              <1> 	;add 	esi, 16 ; 10h
   431                              <1> 	;mov	dl, [hdc]
   432                              <1> 	;jmp	short get_minidisk_partition_entry
   433                              <1> 
   434                              <1> 	; 11/08/2020
   435                              <1> 	;jmp	short get_minidisk_partition_entry_next
   436                              <1> 
   437                              <1> 	; 23/08/2020
   438 00007139 EB3E                <1> 	jmp	short validate_next_minidisk_partition_ok
   439                              <1> 
   440                              <1> 	; 17/07/2020
   441                              <1> 	;; jumping down to deep levels !!!
   442                              <1> 	; ((That is a pitty microsoft preferred ep table chain
   443                              <1> 	; instead of a single table as mbr partition table!?))
   444                              <1> 
   445                              <1> loc_set_valid_hde_partition_entry:
   446                              <1> 	; 15/07/2020
   447 0000713B A0[7B650000]        <1> 	mov	al, [hdc] ; Hard disk drive number (>=80h)
   448 00007140 88C2                <1> 	mov	dl, al ; mov dl, [hdc]
   449 00007142 2C7F                <1> 	sub	al, 7Fh
   450                              <1> 		    ; 1 to 4	
   451 00007144 C0E002              <1> 	shl	al, 2 ; 4 to 16
   452 00007147 2A05[0F7D0100]      <1> 	sub	al, [PP_Counter] ; al - (4 - partition index)
   453                              <1> 			; (disk number * 4) + partition index
   454                              <1> 	
   455                              <1> 	; AL = Partition entry/index, 0 based
   456                              <1>         ;  0 -> hd 0, Partition Table offset = 0
   457                              <1>         ; 15 -> hd 3, Partition Table offset = 3
   458                              <1> 
   459                              <1> 	;mov	ah, 4 ; Logical dos partition (>= 4)
   460                              <1> 	;add	ah, [EP_Counter]
   461                              <1> 		; Logical disk partition index = 4 to 7
   462                              <1> 		; (Primary disk partition index = 0 to 3)
   463                              <1> 
   464                              <1> 	; 13/08/2020
   465 0000714D 8A25[117D0100]      <1> 	mov	ah, [LD_Counter] ; Logical drive index number
   466                              <1> 				; (in current extended partition)
   467 00007153 80C404              <1> 	add	ah, 4 ; 4 to 7
   468                              <1> 	
   469                              <1> 	; 15/07/2020
   470                              <1> 	; CX -> AX
   471                              <1> 	;; 06/01/2016 (TRDOS v2.0)
   472                              <1> 	;; BUGFIX *
   473                              <1> 	;;mov	[esi+LD_PartitionEntry], cl 
   474                              <1> 	;;mov	[esi+LD_DParamEntry], ch 
   475                              <1> 	;mov	[esi+LD_PartitionEntry], cx 
   476 00007156 6689467C            <1> 	mov	[esi+LD_PartitionEntry], ax 	
   477                              <1> 
   478 0000715A 8A0D[BE2F0100]      <1> 	mov	cl, [Last_DOS_DiskNo] 
   479 00007160 80C141              <1> 	add	cl, 'A'
   480 00007163 880E                <1> 	mov	[esi+LD_Name], cl
   481                              <1> 
   482                              <1> 	; 17/07/2020
   483                              <1> 	;cmp	cl, 'Z'
   484                              <1> 	;jb	short logical_drive_count_ok_for_next
   485                              <1> 	;pop	esi ; ***
   486                              <1> 	;pop	esi ; ****
   487                              <1> 	;retn
   488                              <1> 
   489                              <1> ;logical_drive_count_ok_for_next:
   490                              <1> 
   491                              <1> 	;; 15/07/2020
   492                              <1> 	;inc	byte [EP_Counter]
   493                              <1> 	; 13/08/2020
   494 00007165 FE05[117D0100]      <1> 	inc	byte [LD_Counter]	
   495                              <1> 
   496                              <1> 	;mov	dl, [hdc]
   497                              <1> 
   498                              <1> 	; 17/07/2020
   499                              <1> 	;; Now, 
   500                              <1> 	;; we are swimming in deep of an extended partition !!!
   501                              <1> 	; (! sub or chained extended partition tables !)
   502                              <1> 	; ((Logical dos partitions in extended partition were called
   503                              <1> 	;  as 'mini disk partition' in msdos 6.0 source code.))
   504                              <1> 
   505                              <1> validate_next_minidisk_partition:
   506                              <1> 	; 13/08/2020
   507                              <1> 	;pop	esi ; *** ; Extended partition table offset
   508                              <1> 
   509                              <1> 	; 17/07/2020
   510                              <1> 	;cmp	byte [EP_Counter], 4
   511                              <1> 	; 13/08/2020
   512 0000716B 803D[117D0100]04    <1> 	cmp	byte [LD_Counter], 4 ; maximum 4 logical disks
   513                              <1> 				     ; per extended partition
   514                              <1> 	;jnb	continue_check_ep_next_disk
   515                              <1> 	; 25/07/2022
   516 00007172 7205                <1> 	jb	short validate_next_minidisk_partition_ok
   517 00007174 E96FFFFFFF          <1> 	jmp	continue_check_ep_next_disk	
   518                              <1> 
   519                              <1> validate_next_minidisk_partition_ok:
   520                              <1> 	; 13/08/2020
   521                              <1> 	;dec	byte [PP_Counter] ; 4 --> 0
   522                              <1> 	;jz	continue_check_ep_next_disk
   523                              <1> 	
   524                              <1> 	;cmp	esi, PartitionTable+64 
   525                              <1> 	;jnb	continue_check_ep_next_disk
   526                              <1> 
   527                              <1> 	;add	esi, 16
   528                              <1> 	; 13/08/2020
   529 00007179 BE[D87B0100]        <1> 	mov	esi, PartitionTable+16
   530                              <1> 
   531                              <1> 	; 20/07/2020
   532 0000717E 8A4604              <1> 	mov	al, [esi+ptFileSystemID]
   533                              <1> 
   534                              <1> 	; 20/07/2020
   535 00007181 3C05                <1> 	cmp	al, 05h ; Is it an extended dos partition ?
   536 00007183 7409                <1> 	je	short loc_minidisk_next_ep_lba_chs ; 17/07/2020
   537 00007185 3C0F                <1> 	cmp	al, 0Fh ; Is it an extended win4 (LBA mode) partition ?
   538                              <1> 	;jne	continue_check_ep_next_disk ; AL must be 0 here
   539                              <1> 					; (when it is not 05h or 0Fh)
   540                              <1> 					; If AL is not ZERO -> EP Bug!
   541                              <1> 					; (!Microsoft DOS convention!)
   542                              <1> 	; 25/07/2022
   543 00007187 7405                <1> 	je	short loc_minidisk_next_ep_lba_chs
   544 00007189 E95AFFFFFF          <1> 	jmp	continue_check_ep_next_disk	
   545                              <1> 
   546                              <1> loc_minidisk_next_ep_lba_chs:
   547                              <1> 	; 17/07/2020
   548 0000718E 8B4E08              <1> 	mov	ecx, [esi+ptStartSector] ; relative start sector number
   549                              <1> 	;add	ecx, [EP_StartSector]
   550                              <1> 	; 30/08/2020	
   551 00007191 030D[127D0100]      <1> 	add	ecx, [MBR_EP_StartSector] 
   552                              <1> 	; 20/07/2020
   553 00007197 E92DFFFFFF          <1> 	jmp	loc_validate_hde_partition_next
   554                              <1> 
   555                              <1> validate_hd_fat_partition:
   556                              <1> 	; 17/07/2020
   557                              <1> 	; 15/07/2020
   558                              <1> 	;	(optimization)
   559                              <1> 	; 14/07/2020
   560                              <1> 	;	(fat16 -big- partition search bugfix)
   561                              <1> 	; 27/12/2017
   562                              <1> 	; 12/02/2016
   563                              <1> 	; 07/01/2016 (TRDOS 386 = TRDOS v2.0)
   564                              <1> 	; 07/08/2011
   565                              <1> 	; 23/07/2011
   566                              <1> 	; Input
   567                              <1> 	;   DL = Hard/Fixed Disk Drive Number
   568                              <1> 	;   ESI = PartitionTable offset
   569                              <1> 	;   EDI = Extend. Part. Start Sector Pointer
   570                              <1> 	;   EDI = 0 -> Primary Partition 
   571                              <1> 	;   byte [Last_DOS_DiskNo]
   572                              <1>  	; Output
   573                              <1> 	;  cf=0 -> Validated
   574                              <1> 	;   ESI = Logical dos drv desc. table
   575                              <1> 	;   EBX = FAT boot sector buffer
   576                              <1> 	;   byte [Last_DOS_DiskNo]
   577                              <1> 	;  cf=1 -> Not a valid FAT partition
   578                              <1> 	; EAX, EDX, ECX, EDI -> changed 
   579                              <1> 	
   580                              <1> 	;mov 	esi, PartitionTable
   581 0000719C 8A6604              <1> 	mov 	ah, [esi+ptFileSystemID]
   582 0000719F B002                <1> 	mov	al, 2 ; 27/12/2017
   583 000071A1 80FC06              <1> 	cmp 	ah, 06h ; FAT16 CHS partition (>=32MB)
   584                              <1> 	; 12/02/2016
   585                              <1> 	;;jb	short loc_not_a_valid_fat_partition2
   586                              <1>  	;jnb	short vhdp_FAT16_32
   587                              <1> 	; 14/07/2020 (BugFix)
   588 000071A4 7711                <1> 	ja	short vhdp_FAT16_32
   589 000071A6 7425                <1> 	je	short loc_set_valid_hd_partition_params
   590                              <1> 
   591                              <1> vhdp_FAT12_16:
   592                              <1> 	; 27/12/2017
   593 000071A8 FEC8                <1> 	dec	al ; mov al, 1
   594 000071AA 38C4                <1> 	cmp	ah, al ; 1 ; FAT12 partition
   595 000071AC 741F                <1> 	je	short loc_set_valid_hd_partition_params
   596                              <1> 	;
   597 000071AE FEC0                <1> 	inc	al ; mov al, 2
   598 000071B0 80FC04              <1> 	cmp	ah, 04h ; FAT16 CHS partition (< 32MB)
   599 000071B3 7418                <1> 	je	short loc_set_valid_hd_partition_params
   600                              <1> 	
   601                              <1> 	; 15/07/2020
   602                              <1> 	; (ah = 05h, 02h or 03h)
   603                              <1> loc_not_a_valid_fat_partition1:
   604 000071B5 F9                  <1> 	stc
   605                              <1> 	; cf=1
   606 000071B6 C3                  <1> 	retn
   607                              <1> 
   608                              <1> vhdp_FAT16_32:
   609                              <1> 	; 15/07/2020
   610                              <1> 	;mov	al, 3
   611 000071B7 FEC0                <1> 	inc	al
   612 000071B9 80FC0C              <1> 	cmp	ah, 0Ch ; FAT32 LBA partition
   613 000071BC 740F                <1> 	je	short loc_set_valid_hd_partition_params
   614 000071BE 7706                <1> 	ja	short vhdp_check_FAT16_lba
   615                              <1> 
   616                              <1> vhdp_check_FAT32_chs:
   617 000071C0 80FC0B              <1> 	cmp	ah, 0Bh ; FAT32 CHS partition 
   618 000071C3 7408                <1> 	je	short loc_set_valid_hd_partition_params
   619                              <1> 	;jne	short loc_not_a_valid_fat_partition1
   620                              <1> 
   621                              <1> 	;stc
   622                              <1> loc_not_a_valid_fat_partition2:
   623 000071C5 C3                  <1> 	retn
   624                              <1> 
   625                              <1> vhdp_check_FAT16_lba:
   626 000071C6 80FC0E              <1> 	cmp	ah, 0Eh ; FAT16 LBA partition
   627 000071C9 75EA                <1> 	jne	short loc_not_a_valid_fat_partition1
   628                              <1> 
   629                              <1> 	;mov	al, 2
   630 000071CB FEC8                <1> 	dec	al
   631                              <1> 
   632                              <1> loc_set_valid_hd_partition_params:
   633                              <1> 	; 30/07/2022
   634                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   635                              <1> 	; 15/07/2020
   636                              <1> 	;inc 	byte [Last_DOS_DiskNo] ; > 1
   637                              <1> 	;
   638 000071CD 31DB                <1> 	xor	ebx, ebx
   639 000071CF 8A3D[BE2F0100]      <1> 	mov	bh, [Last_DOS_DiskNo] ; * 256	
   640 000071D5 FEC7                <1> 	inc	bh ; 15/07/2020
   641 000071D7 81C300010900        <1> 	add	ebx, Logical_DOSDisks
   642                              <1> 	;
   643 000071DD C6430102            <1> 	mov	byte [ebx+LD_DiskType], 2
   644 000071E1 885302              <1> 	mov	byte [ebx+LD_PhyDrvNo], dl
   645                              <1> 	;mov	byte [ebx+LD_FATType], al ; 2 or 3
   646                              <1> 	;mov	byte [ebx+LD_FSType], ah ; 06h, 0Eh, 0Bh, 0Ch
   647 000071E4 66894303            <1> 	mov	word [ebx+LD_FATType], ax
   648                              <1> 	;
   649 000071E8 8B4E08              <1> 	mov	ecx, [esi+ptStartSector]
   650 000071EB 09FF                <1> 	or	edi, edi 
   651 000071ED 7402                <1> 	jz	short pass_hd_FAT_ep_start_sector_adding
   652                              <1> loc_add_hd_FAT_ep_start_sector:
   653                              <1> 	; 17/07/2020
   654 000071EF 030F                <1> 	add	ecx, [edi]
   655                              <1> pass_hd_FAT_ep_start_sector_adding:
   656 000071F1 894B6C              <1> 	mov	[ebx+LD_StartSector], ecx
   657                              <1> loc_hd_FAT_logical_drv_init:
   658 000071F4 89DD                <1> 	mov	ebp, ebx
   659                              <1> 	;mov	dl, [ebx+LD_PhyDrvNo]
   660 000071F6 A0[0E7D0100]        <1> 	mov	al, [HD_LBA_yes] ; 07/01/2016
   661 000071FB 884305              <1> 	mov	[ebx+LD_LBAYes], al
   662 000071FE BB[1A7D0100]        <1> 	mov	ebx, DOSBootSectorBuff ; buffer address
   663 00007203 08C0                <1> 	or	al, al
   664 00007205 740C                <1> 	jz	short loc_hd_FAT_drv_init_load_bs_chs
   665                              <1> loc_hd_FAT_drv_init_load_bs_lba:
   666                              <1> 	; DL = Physical drive number
   667                              <1>    	;mov	ecx, [esi+ptStartSector] ; sector number
   668                              <1> 	;mov	ebx, DOSBootSectorBuff ; buffer address
   669                              <1> 	; LBA read/write (with private LBA function) 
   670                              <1> 	;((Retro UNIX 386 v1 - DISK I/O code by Erdogan Tan))
   671                              <1> 	; dl = physical drive number (0,1, 80h, 81h, 82h, 83h)
   672 00007207 B41B                <1> 	mov	ah, 1Bh ; LBA read
   673 00007209 B001                <1> 	mov	al, 1 ; sector count
   674 0000720B E885DDFFFF          <1> 	call	int13h
   675 00007210 7313                <1> 	jnc	short loc_hd_drv_FAT_boot_validation
   676                              <1> loc_not_a_valid_fat_partition3:
   677 00007212 C3                  <1> 	retn
   678                              <1> loc_hd_FAT_drv_init_load_bs_chs:
   679 00007213 8A7601              <1> 	mov	dh, [esi+ptBeginHead]
   680 00007216 668B4E02            <1> 	mov	cx, [esi+ptBeginSector]
   681 0000721A 66B80102            <1> 	mov	ax, 0201h ; Read 1 sector
   682                              <1> 	;mov	ebx, DOSBootSectorBuff
   683 0000721E E872DDFFFF          <1> 	call	int13h
   684 00007223 72ED                <1> 	jc	short loc_not_a_valid_fat_partition3
   685                              <1> loc_hd_drv_FAT_boot_validation:
   686                              <1> 	;mov	esi, DOSBootSectorBuff
   687 00007225 89DE                <1> 	mov	esi, ebx
   688 00007227 6681BEFE01000055AA  <1> 	cmp	word [esi+BS_Validation], 0AA55h
   689 00007230 7514                <1> 	jne	short loc_not_a_valid_fat_partition4
   690 00007232 807E15F8            <1> 	cmp	byte [esi+BPB_Media], 0F8h
   691 00007236 750E                <1> 	jne	short loc_not_a_valid_fat_partition4
   692                              <1> 
   693                              <1> 	; 25/07/2022
   694 00007238 31C9                <1> 	xor	ecx, ecx
   695                              <1> 
   696                              <1> 	; 27/12/2017
   697 0000723A 807D0303            <1> 	cmp	byte [ebp+LD_FATType], 3
   698 0000723E 7508                <1> 	jne	short loc_hd_FAT16_BPB
   699                              <1> 
   700                              <1> loc_hd_drv_FAT32_boot_validation:
   701 00007240 807E4229            <1> 	cmp	byte [esi+BS_FAT32_BootSig], 29h
   702 00007244 7413                <1> 	je	short loc_hd_FAT32_BPB
   703                              <1> 
   704                              <1> loc_not_a_valid_fat_partition4:
   705 00007246 F9                  <1> 	stc
   706 00007247 C3                  <1> 	retn
   707                              <1> 
   708                              <1> loc_hd_FAT16_BPB:
   709 00007248 807E2629            <1> 	cmp	byte [esi+BS_BootSig], 29h
   710 0000724C 75F8                <1> 	jne	short loc_not_a_valid_fat_partition4
   711                              <1> 
   712 0000724E 66837E1600          <1> 	cmp	word [esi+BPB_FATSz16], 0
   713 00007253 7604                <1> 	jna	short loc_hd_big_FAT16_BPB
   714                              <1> 	;mov	ecx, 32
   715                              <1> 	; 25/07/2022
   716 00007255 B120                <1> 	mov	cl, 32
   717                              <1> 	; ecx = 32
   718 00007257 EB02                <1> 	jmp	short loc_hd_move_FAT_BPB
   719                              <1> 
   720                              <1> loc_hd_FAT32_BPB:
   721                              <1> 	;cmp	word [esi+BPB_FATSz16], 0
   722                              <1> 	;ja	short loc_not_a_valid_fat_partition4
   723                              <1> loc_hd_big_FAT16_BPB:
   724                              <1> 	;mov	ecx, 45
   725                              <1> 	; 25/07/2022
   726 00007259 B12D                <1> 	mov	cl, 45
   727                              <1> 	; ecx = 45
   728                              <1> loc_hd_move_FAT_BPB:
   729 0000725B 89EF                <1> 	mov 	edi, ebp
   730                              <1> 	;mov	esi, ebx ; Boot sector
   731 0000725D 57                  <1> 	push	edi
   732 0000725E 83C706              <1> 	add	edi, LD_BPB
   733 00007261 F366A5              <1> 	rep	movsw 
   734 00007264 5E                  <1> 	pop	esi
   735 00007265 0FB74614            <1> 	movzx	eax, word [esi+LD_BPB+BPB_RsvdSecCnt]
   736 00007269 03466C              <1> 	add	eax, [esi+LD_StartSector]
   737 0000726C 894660              <1> 	mov	[esi+LD_FATBegin], eax
   738 0000726F 807E0303            <1> 	cmp	byte [esi+LD_FATType], 3
   739 00007273 7223                <1> 	jb	short loc_set_FAT16_RootDirLoc
   740                              <1> loc_set_FAT32_RootDirLoc:
   741 00007275 8B462A              <1> 	mov	eax, [esi+LD_BPB+BPB_FATSz32]
   742 00007278 0FB65E16            <1>         movzx	ebx, byte [esi+LD_BPB+BPB_NumFATs]
   743 0000727C F7E3                <1> 	mul	ebx
   744 0000727E 034660              <1> 	add	eax, [esi+LD_FATBegin]
   745                              <1> loc_set_FAT32_data_begin:
   746 00007281 894668              <1> 	mov	[esi+LD_DATABegin], eax
   747 00007284 894664              <1> 	mov	[esi+LD_ROOTBegin], eax
   748                              <1> 	; If Root Directory Cluster <> 2 then
   749                              <1> 	; change the beginning sector value 
   750                              <1> 	; of the root dir by adding sector offset.
   751 00007287 8B4632              <1> 	mov	eax, [esi+LD_BPB+BPB_RootClus]
   752                              <1> 	;sub	eax, 2
   753                              <1> 	; 30/07/2022
   754 0000728A 48                  <1> 	dec	eax ; 2 -> 1
   755 0000728B 48                  <1> 	dec	eax ; 1 -> 0
   756 0000728C 7433                <1> 	jz	short short loc_set_32bit_FAT_total_sectors  
   757                              <1> 	;movzx	ebx, byte [esi+LD_BPB+BPB_SecPerClust]
   758 0000728E 8A5E13              <1> 	mov	bl, [esi+LD_BPB+BPB_SecPerClust] 
   759 00007291 F7E3                <1> 	mul	ebx
   760 00007293 014664              <1> 	add	[esi+LD_ROOTBegin], eax
   761 00007296 EB29                <1> 	jmp	short loc_set_32bit_FAT_total_sectors
   762                              <1> 	;
   763                              <1> loc_set_FAT16_RootDirLoc:
   764 00007298 0FB64616            <1> 	movzx	eax, byte [esi+LD_BPB+BPB_NumFATs]
   765 0000729C 0FB7561C            <1> 	movzx	edx, word [esi+LD_BPB+BPB_FATSz16]
   766 000072A0 F7E2                <1> 	mul	edx
   767 000072A2 034660              <1> 	add	eax, [esi+LD_FATBegin]  
   768 000072A5 894664              <1> 	mov	[esi+LD_ROOTBegin], eax
   769                              <1> loc_set_FAT16_data_begin:
   770 000072A8 894668              <1> 	mov	[esi+LD_DATABegin], eax 
   771                              <1> 	;mov	eax, 20h  ; Size of a directory entry
   772                              <1> 	;;movzx	edx, word [esi+LD_BPB+BPB_RootEntCnt]
   773                              <1>         ;mov	dx, [esi+LD_BPB+BPB_RootEntCnt]
   774                              <1>         ;mul	edx
   775                              <1> 	;;mov	ecx, 511
   776                              <1> 	;mov	cx, 511
   777                              <1> 	;add	eax, ecx
   778                              <1> 	;inc	ecx ; 512
   779                              <1> 	;div	ecx
   780                              <1> 	; 14/07/2020
   781 000072AB 0FB74617            <1> 	movzx	eax, word [esi+LD_BPB+BPB_RootEntCnt]
   782 000072AF 6683C00F            <1> 	add	ax, 15
   783                              <1> 	;shr	ax, 4 ; / 16 ; (16 entries per sector)
   784                              <1> 	; 25/07/2022
   785 000072B3 C1E804              <1> 	shr	eax, 4
   786 000072B6 014668              <1> 	add	[esi+LD_DATABegin], eax
   787                              <1> 	;movzx	eax, word [esi+LD_BPB+BPB_TotalSec16]
   788 000072B9 668B4619            <1> 	mov	ax, [esi+LD_BPB+BPB_TotalSec16]
   789                              <1> 	;test	ax, ax
   790                              <1> 	; 25/07/2022
   791 000072BD 85C0                <1> 	test	eax, eax
   792                              <1> 	;jz	short loc_set_32bit_FAT_total_sectors
   793                              <1> ;loc_set_16bit_FAT_total_sectors:
   794                              <1> 	;mov	[esi+LD_TotalSectors], eax
   795                              <1> 	;jmp	short loc_set_hd_FAT_cluster_count
   796                              <1> 	; 14/07/2020
   797 000072BF 7503                <1> 	jnz	short loc_set_hd_FAT_cluster_count
   798                              <1> loc_set_32bit_FAT_total_sectors:
   799 000072C1 8B4626              <1> 	mov	eax, [esi+LD_BPB+BPB_TotalSec32]
   800                              <1> 	;mov	[esi+LD_TotalSectors], eax
   801                              <1> loc_set_hd_FAT_cluster_count:
   802 000072C4 894670              <1> 	mov	[esi+LD_TotalSectors], eax ; 14/07/2020
   803 000072C7 8B5668              <1> 	mov	edx, [esi+LD_DATABegin]
   804 000072CA 2B566C              <1> 	sub	edx, [esi+LD_StartSector]
   805 000072CD 29D0                <1> 	sub	eax, edx
   806 000072CF 31D2                <1> 	xor	edx, edx ; 0
   807 000072D1 0FB64E13            <1>         movzx   ecx, byte [esi+LD_BPB+BPB_SecPerClust]
   808 000072D5 F7F1                <1>         div	ecx 
   809 000072D7 894678              <1> 	mov	[esi+LD_Clusters], eax
   810                              <1> 	; Maximum Valid Cluster Number= EAX +1
   811                              <1> 	; with 2 reserved clusters= EAX +2
   812                              <1> loc_set_hd_FAT_fs_free_sectors:
   813                              <1> 	;mov	dword [esi+LD_FreeSectors], 0
   814 000072DA E852010000          <1> 	call	get_free_FAT_sectors
   815 000072DF 720D                <1> 	jc	short loc_validate_hd_FAT_partition_retn
   816 000072E1 894674              <1> 	mov	[esi+LD_FreeSectors], eax
   817 000072E4 C6467E06            <1> 	mov	byte [esi+LD_MediaChanged], 6  ; Volume Name Reset
   818                              <1> 
   819                              <1> 	; 15/07/2020
   820 000072E8 FE05[BE2F0100]      <1> 	inc 	byte [Last_DOS_DiskNo] ; > 1
   821                              <1> 
   822                              <1> 	;mov	cl, [Last_DOS_DiskNo] 
   823                              <1> 	;add	cl, 'A'
   824                              <1> 	;mov	[esi+LD_FS_Name], cl
   825                              <1> 
   826                              <1> loc_validate_hd_FAT_partition_retn:         
   827 000072EE C3                  <1> 	retn
   828                              <1> 
   829                              <1> validate_hd_fs_partition:
   830                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   831                              <1> 	; 03/02/2018
   832                              <1> 	; 09/12/2017
   833                              <1> 	; 13/02/2016
   834                              <1> 	; 10/01/2016 (TRDOS 386 = TRDOS v2.0)
   835                              <1> 	; 29/01/2011
   836                              <1> 	; 23/07/2011
   837                              <1> 	; Input
   838                              <1> 	;   DL = Hard/Fixed Disk Drive Number
   839                              <1> 	;   ESI = PartitionTable offset
   840                              <1> 	;   byte [Last_DOS_DiskNo]
   841                              <1> 	; Output
   842                              <1> 	;  cf=0 -> Validated
   843                              <1> 	;   ESI = Logical dos drv desc. table
   844                              <1> 	;   EBX = Singlix FS boot sector buffer
   845                              <1> 	;   byte [Last_DOS_DiskNo]
   846                              <1> 	;  cf=1 -> Not a valid 'Singlix FS' partition
   847                              <1> 	; EAX, EDX, ECX, EDI -> changed 
   848                              <1> 
   849                              <1> 	;mov	esi, PartitionTable
   850 000072EF 8A6604              <1> 	mov	ah, [esi+ptFileSystemID]
   851 000072F2 80FCA1              <1> 	cmp	ah, 0A1h ; SINGLIX FS1 (trfs1) partition
   852 000072F5 7549                <1> 	jne	short loc_validate_hd_fs_partition_stc_retn
   853                              <1> loc_set_valid_hd_fs_partition_params:
   854 000072F7 FE05[BE2F0100]      <1> 	inc	byte [Last_DOS_DiskNo] ; > 1
   855 000072FD 30C0                <1> 	xor	al, al ; mov al, 0
   856                              <1> 	;mov	[drv], dl
   857 000072FF 29DB                <1> 	sub	ebx, ebx ; 0
   858 00007301 8A3D[BE2F0100]      <1> 	mov	bh, [Last_DOS_DiskNo] 
   859 00007307 81C300010900        <1> 	add	ebx, Logical_DOSDisks
   860 0000730D C6430102            <1> 	mov	byte [ebx+LD_DiskType], 2
   861 00007311 885302              <1> 	mov	[ebx+LD_PhyDrvNo], dl
   862                              <1> 	;mov	[ebx+LD_FATType], al ; 0
   863                              <1> 	;mov	[ebx+LD_FSType], ah
   864 00007314 66894303            <1> 	mov	[ebx+LD_FATType], ax
   865                              <1> 	;mov	eax, [esi+ptStartSector]
   866                              <1> 	;mov	[ebx+LD_StartSector], eax
   867                              <1> loc_hd_fs_logical_drv_init:
   868 00007318 89DD                <1> 	mov	ebp, ebx ; 10/01/2016
   869                              <1> 	;mov	dl, [ebx+LD_PhyDrvNo]
   870 0000731A A0[0E7D0100]        <1> 	mov	al, [HD_LBA_yes] ; 10/01/2016
   871 0000731F 884305              <1> 	mov	[ebx+LD_LBAYes], al
   872 00007322 89DE                <1> 	mov	esi, ebx
   873 00007324 BB[1A7D0100]        <1> 	mov	ebx, DOSBootSectorBuff ; buffer address
   874 00007329 08C0                <1> 	or	al, al
   875 0000732B 7515                <1> 	jnz	short loc_hd_fs_drv_init_load_bs_lba
   876                              <1> loc_hd_fs_drv_init_load_bs_chs:
   877 0000732D 8A7601              <1> 	mov	dh, [esi+ptBeginHead]
   878 00007330 668B4E02            <1> 	mov	cx, [esi+ptBeginSector]
   879 00007334 66B80102            <1> 	mov	ax, 0201h ; Read 1 sector
   880                              <1> 	;mov	ebx, DOSBootSectorBuff
   881 00007338 E858DCFFFF          <1> 	call	int13h
   882 0000733D 7311                <1> 	jnc	short loc_hd_drv_fs_boot_validation
   883                              <1> loc_validate_hd_fs_partition_err_retn:
   884 0000733F C3                  <1> 	retn
   885                              <1> loc_validate_hd_fs_partition_stc_retn:
   886 00007340 F9                  <1> 	stc
   887 00007341 C3                  <1> 	retn
   888                              <1> loc_hd_fs_drv_init_load_bs_lba:
   889                              <1> 	; DL = Physical drive number
   890                              <1> 	;mov	esi, ebx
   891 00007342 8B4E08              <1>    	mov	ecx, [esi+ptStartSector] ; sector number
   892                              <1> 	;mov	ebx, DOSBootSectorBuff ; buffer address
   893                              <1> 	; LBA read/write (with private LBA function) 
   894                              <1> 	;((Retro UNIX 386 v1 - DISK I/O code by Erdogan Tan))
   895                              <1> 	; dl = physical drive number (0,1, 80h, 81h, 82h, 83h)
   896 00007345 B41B                <1> 	mov	ah, 1Bh ; LBA read
   897 00007347 B001                <1> 	mov	al, 1 ; sector count
   898 00007349 E847DCFFFF          <1> 	call	int13h
   899 0000734E 72EF                <1> 	jc	short loc_validate_hd_fs_partition_err_retn
   900                              <1> loc_hd_drv_fs_boot_validation:
   901                              <1> 	;mov	esi, DOSBootSectorBuff
   902 00007350 89DE                <1> 	mov	esi, ebx ; Boot sector buffer
   903 00007352 6681BEFE01000055AA  <1> 	cmp	word [esi+BS_Validation], 0AA55h
   904 0000735B 75E3                <1> 	jne	short loc_validate_hd_fs_partition_stc_retn
   905                              <1>         ;
   906                              <1> 	;Singlix FS Extensions to TR-DOS (7/6/2009) 
   907 0000735D 66817E034653        <1> 	cmp	word [esi+bs_FS_Identifier], 'FS' ; 03/02/2018
   908 00007363 75DB                <1> 	jne	short loc_validate_hd_fs_partition_stc_retn
   909                              <1>         ;'A1h' check is not necessary
   910                              <1> 	;  if 'FS' check is passed as OK/Yes.
   911 00007365 807E09A1            <1> 	cmp	byte [esi+bs_FS_PartitionID], 0A1h
   912 00007369 75D5                <1> 	jne	short loc_validate_hd_fs_partition_stc_retn
   913                              <1> 	;
   914 0000736B 89EF                <1> 	mov	edi, ebp ; 10/01/2016
   915                              <1> 	;
   916 0000736D 8A462D              <1> 	mov	al, byte [esi+bs_FS_LBA_Ready]
   917 00007370 884705              <1> 	mov	[edi+LD_FS_LBAYes], al
   918                              <1> 	;
   919                              <1> 	; 03/01/2010 CHS -> DOS FAT/BPB compatibility fix
   920 00007373 8A4608              <1> 	mov	al, [esi+bs_FS_MediaAttrib]
   921 00007376 884706              <1> 	mov	byte [edi+LD_FS_MediaAttrib], al
   922                              <1> 	;
   923 00007379 8A460A              <1> 	mov	al, [esi+bs_FS_VersionMaj]
   924 0000737C 884707              <1> 	mov	[edi+LD_FS_VersionMajor], al
   925                              <1> 	;
   926 0000737F 668B4606            <1> 	mov	ax, [esi+bs_FS_BytesPerSec]
   927 00007383 66894711            <1> 	mov	[edi+LD_FS_BytesPerSec], ax
   928 00007387 8A462E              <1> 	mov	al, [esi+bs_FS_SecPerTrack]
   929 0000738A 30E4                <1> 	xor	ah, ah ; 09/12/2017
   930 0000738C 6689471E            <1> 	mov	[edi+LD_FS_SecPerTrack], ax
   931 00007390 8A462F              <1> 	mov	al, [esi+bs_FS_Heads]
   932 00007393 66894720            <1> 	mov	[edi+LD_FS_NumHeads], ax
   933                              <1> 	;
   934 00007397 8B4628              <1> 	mov	eax, [esi+bs_FS_UnDelDirD]
   935 0000739A 894722              <1> 	mov	[edi+LD_FS_UnDelDirD], eax
   936 0000739D 8B5618              <1> 	mov	edx, [esi+bs_FS_MATLocation]
   937 000073A0 89570C              <1> 	mov	[edi+LD_FS_MATLocation], edx
   938 000073A3 8B461C              <1> 	mov	eax, [esi+bs_FS_RootDirD]
   939 000073A6 894708              <1> 	mov	[edi+LD_FS_RootDirD], eax
   940 000073A9 8B460C              <1> 	mov	eax, [esi+bs_FS_BeginSector]
   941 000073AC 89476C              <1> 	mov	[edi+LD_FS_BeginSector], eax
   942 000073AF 8B4710              <1> 	mov	eax, [edi+bs_FS_VolumeSize]
   943 000073B2 894770              <1> 	mov	[edi+LD_FS_VolumeSize], eax
   944                              <1> 	;
   945 000073B5 89D0                <1> 	mov	eax, edx ; [edi+LD_FS_MATLocation]
   946 000073B7 03476C              <1> 	add	eax, [edi+LD_FS_BeginSector]
   947 000073BA 89FE                <1> 	mov	esi, edi
   948                              <1> mread_hd_fs_MAT_sector:
   949                              <1>         ;mov	ebx, DOSBootSectorBuff
   950                              <1> 	;mov	ecx, 1
   951                              <1> 	; 25/07/2022
   952 000073BC 29C9                <1> 	sub	ecx, ecx
   953 000073BE FEC1                <1> 	inc	cl
   954                              <1> 	; ecx = 1	
   955 000073C0 E8E0A90000          <1> 	call	disk_read
   956 000073C5 7248                <1> 	jc	short loc_validate_hd_fs_partition_retn
   957                              <1> 	; EDI will not be changed
   958 000073C7 89DE                <1> 	mov	esi, ebx
   959                              <1> use_hdfs_mat_sector_params:
   960 000073C9 8B460C              <1> 	mov	eax, [esi+FS_MAT_DATLocation]
   961 000073CC 894714              <1> 	mov	[edi+LD_FS_DATLocation], eax
   962 000073CF 8B4610              <1> 	mov	eax, [esi+FS_MAT_DATScount]
   963 000073D2 894718              <1> 	mov	[edi+LD_FS_DATSectors], eax
   964 000073D5 8B4614              <1> 	mov	eax, [esi+FS_MAT_FreeSectors]
   965 000073D8 894774              <1>         mov     [edi+LD_FS_FreeSectors], eax
   966 000073DB 8B4618              <1> 	mov	eax, [esi+FS_MAT_FirstFreeSector]
   967 000073DE 894778              <1> 	mov	[edi+LD_FS_FirstFreeSector], eax
   968 000073E1 8B4708              <1> 	mov	eax, [edi+LD_FS_RootDirD]
   969 000073E4 03476C              <1> 	add	eax, [edi+LD_FS_BeginSector]
   970 000073E7 89FE                <1> 	mov	esi, edi   
   971                              <1> read_hd_fs_RDT_sector:
   972 000073E9 BB[1A7D0100]        <1> 	mov	ebx, DOSBootSectorBuff
   973                              <1> 	;mov	ecx, 1
   974 000073EE B101                <1> 	mov	cl, 1
   975 000073F0 E8B0A90000          <1> 	call	disk_read
   976 000073F5 7218                <1> 	jc	short loc_validate_hd_fs_partition_retn
   977                              <1> 	; EDI will not be changed
   978 000073F7 89DE                <1> 	mov	esi, ebx
   979                              <1> use_hdfs_RDT_sector_params:
   980 000073F9 8B461C              <1> 	mov	eax, [esi+FS_RDT_VolumeSerialNo]
   981 000073FC 894728              <1> 	mov	[edi+LD_FS_VolumeSerial], eax
   982 000073FF 57                  <1> 	push	edi
   983                              <1> 	;mov	ecx, 16
   984 00007400 B110                <1> 	mov	cl, 16
   985 00007402 83C640              <1> 	add	esi, FS_RDT_VolumeName
   986 00007405 83C72C              <1> 	add	edi, LD_FS_VolumeName
   987 00007408 F3A5                <1> 	rep	movsd ; 64 bytes
   988 0000740A 5E                  <1> 	pop	esi
   989                              <1> 		; Volume Name Reset
   990 0000740B C6467E06            <1>         mov     byte [esi+LD_FS_MediaChanged], 6
   991                              <1> 	;
   992                              <1>         ;mov	cl, [Last_DOS_DiskNo] 
   993                              <1> 	;add	cl, 'A'
   994                              <1> 	;mov	[esi+LD_FS_Name], cl
   995                              <1> 
   996                              <1> loc_validate_hd_fs_partition_retn:
   997 0000740F C3                  <1> 	retn
   998                              <1> 
   999                              <1> load_masterboot:
  1000                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
  1001                              <1> 	; 14/07/2020 (Reset function has been removed)
  1002                              <1> 	;
  1003                              <1> 	; 10/01/2016 (TRDOS 386 = TRDOS v2.0)
  1004                              <1> 	; 2005 - 2011
  1005                              <1> 	; input -> DL = drive number
  1006                              <1> ;	mov	ah, 0Dh ; Alternate disk reset
  1007                              <1> ;	call	int13h
  1008                              <1> ;	jnc	short pass_reset_error
  1009                              <1> ;harddisk_error:
  1010                              <1> ;  	retn
  1011                              <1> ;pass_reset_error:
  1012 00007410 BB[0A7A0100]        <1> 	mov	ebx, MasterBootBuff
  1013                              <1> 	;mov	ax, 0201h
  1014                              <1> 	;mov	cx, 1
  1015                              <1> 	; 25/07/2022
  1016                              <1> 	;xor	ecx, ecx
  1017                              <1> 	;inc	cl
  1018 00007415 B101                <1> 	mov	cl, 1
  1019                              <1> 	; ecx = 1
  1020 00007417 89C8                <1> 	mov	eax, ecx ; ch = cylinder = 0
  1021 00007419 B402                <1> 	mov	ah, 2  ; chs read
  1022                              <1> 	; eax = 0201h
  1023 0000741B 30F6                <1> 	xor	dh, dh ; head = 0
  1024 0000741D E873DBFFFF          <1> 	call	int13h
  1025 00007422 720C                <1> 	jc	short harddisk_error
  1026                              <1> 	;
  1027 00007424 66813D[087C0100]55- <1> 	cmp	word [MBIDCode], 0AA55h
  1027 0000742C AA                  <1>
  1028 0000742D 7401                <1> 	je	short load_masterboot_ok
  1029 0000742F F9                  <1> 	stc
  1030                              <1> harddisk_error:
  1031                              <1> load_masterboot_ok:
  1032 00007430 C3                  <1> 	retn
  1033                              <1> 
  1034                              <1> get_free_FAT_sectors:
  1035                              <1> 	; 29/08/2023
  1036                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
  1037                              <1> 	; 21/12/2017
  1038                              <1> 	; 29/02/2016
  1039                              <1> 	; 13/02/2016
  1040                              <1> 	; 04/02/2016
  1041                              <1> 	; 07/01/2016 (TRDOS 386 = TRDOS v2.0)
  1042                              <1> 	; 11/07/2010
  1043                              <1> 	; 21/06/2009
  1044                              <1> 	; INPUT: ESI = Logical DOS Drive Description Table address
  1045                              <1> 	; OUTPUT: STC => Error
  1046                              <1>         ;	cf = 0 and EAX = Free FAT sectors
  1047                              <1> 	; Also, related parameters and FAT buffer will be reset and updated
  1048                              <1> 
  1049 00007431 31C0                <1> 	xor	eax, eax
  1050                              <1> 	;mov	[esi+LD_FreeSectors], eax ; Reset
  1051                              <1> 	
  1052 00007433 807E0302            <1>         cmp     byte [esi+LD_FATType], 2
  1053 00007437 7653                <1> 	jna	short loc_gfc_get_fat_free_clusters
  1054                              <1> 
  1055                              <1> 	; 29/02/2016
  1056 00007439 48                  <1> 	dec	eax ; 0FFFFFFFFh
  1057 0000743A 89463A              <1> 	mov	[esi+LD_BPB+BPB_Reserved], eax ; Free cluster count (reset)
  1058 0000743D 89463E              <1> 	mov	[esi+LD_BPB+BPB_Reserved+4], eax ; First Free Cluster (reset)
  1059 00007440 40                  <1> 	inc	eax ; 0
  1060                              <1> 	;
  1061 00007441 668B4636            <1> 	mov	ax, [esi+LD_BPB+BPB_FSInfo]
  1062 00007445 03466C              <1> 	add	eax, [esi+LD_StartSector]
  1063                              <1> 
  1064 00007448 BB[1A7D0100]        <1> 	mov	ebx, DOSBootSectorBuff
  1065                              <1> 	;mov	ecx, 1
  1066                              <1> 	; 25/07/2022
  1067 0000744D 31C9                <1> 	xor	ecx, ecx
  1068 0000744F FEC1                <1> 	inc	cl
  1069                              <1> 	; ecx = 1
  1070 00007451 E84FA90000          <1>  	call	disk_read
  1071 00007456 7301                <1> 	jnc	short loc_gfc_check_fsinfo_signs
  1072                              <1> retn_gfc_get_fsinfo_sec:
  1073 00007458 C3                  <1> 	retn
  1074                              <1> 
  1075                              <1> loc_gfc_check_fsinfo_signs:
  1076 00007459 BB[1A7D0100]        <1> 	mov 	ebx, DOSBootSectorBuff ; 13/02/2016
  1077 0000745E 813B52526141        <1>         cmp     dword [ebx], 41615252h
  1078 00007464 7524                <1> 	jne	short retn_gfc_get_fsinfo_stc
  1079                              <1> 	;add	ebx, 484
  1080                              <1> 	;cmp	dword [ebx], 61417272h
  1081 00007466 81BBE4010000727241- <1> 	cmp	dword [ebx+484], 61417272h
  1081 0000746F 61                  <1>
  1082 00007470 7518                <1> 	jne	short retn_gfc_get_fsinfo_stc
  1083                              <1> 	;add	ebx, 4
  1084                              <1> 	;mov	eax, [ebx]
  1085 00007472 8B83E8010000        <1> 	mov	eax, [ebx+488]
  1086                              <1> 	; 29/02/2016
  1087 00007478 89463A              <1> 	mov	[esi+LD_BPB+BPB_Reserved], eax ; Free cluster count
  1088 0000747B 8B93EC010000        <1> 	mov	edx, [ebx+492] 
  1089                              <1> 	; 29/08/2023 (BugFix)
  1090 00007481 89563E              <1> 	mov	[esi+LD_BPB+BPB_Reserved+4], edx ; First Free Cluster
  1091                              <1> 	; 21/12/2017
  1092 00007484 89C3                <1> 	mov	ebx, eax ; (initial value = 0FFFFFFFFh)
  1093 00007486 43                  <1> 	inc	ebx ; 0FFFFFFFFh -> 0  
  1094 00007487 7513                <1> 	jnz	short short retn_from_get_free_fat32_clusters
  1095 00007489 C3                  <1> 	retn
  1096                              <1> 
  1097                              <1> retn_gfc_get_fsinfo_stc:
  1098 0000748A F9                  <1> 	stc
  1099 0000748B C3                  <1> 	retn
  1100                              <1> 
  1101                              <1> loc_gfc_get_fat_free_clusters:
  1102                              <1> 	;mov	eax, 2
  1103 0000748C B002                <1> 	mov	al, 2
  1104                              <1> 	;mov	[FAT_CurrentCluster], eax
  1105                              <1> loc_gfc_loop_get_next_cluster:
  1106 0000748E E8744D0000          <1> 	call	get_next_cluster
  1107 00007493 730E                <1> 	jnc	short loc_gfc_free_fat_clusters_cont
  1108 00007495 21C0                <1> 	and	eax, eax
  1109 00007497 7411                <1> 	jz	short loc_gfc_pass_inc_free_cluster_count
  1110                              <1>  
  1111                              <1> retn_from_get_free_fat_clusters:
  1112 00007499 8B4674              <1> 	mov	eax, [esi+LD_FreeSectors] ; Free clusters !
  1113                              <1> retn_from_get_free_fat32_clusters:
  1114 0000749C 0FB65E13            <1>         movzx	ebx, byte [esi+LD_BPB+BPB_SecPerClust]
  1115 000074A0 F7E3                <1>       	mul	ebx
  1116                              <1> 	;mov	[esi+LD_FreeSectors], eax ; Free sectors
  1117                              <1> retn_get_free_sectors_calc:
  1118 000074A2 C3                  <1> 	retn
  1119                              <1> 
  1120                              <1> loc_gfc_free_fat_clusters_cont:
  1121 000074A3 09C0                <1> 	or	eax, eax
  1122 000074A5 7503                <1> 	jnz	short loc_gfc_pass_inc_free_cluster_count
  1123 000074A7 FF4674              <1> 	inc	dword [esi+LD_FreeSectors] ; Free clusters !
  1124                              <1>    
  1125                              <1> loc_gfc_pass_inc_free_cluster_count:
  1126                              <1> 	;mov	eax, [FAT_CurrentCluster]
  1127 000074AA 89C8                <1> 	mov	eax, ecx ; [FAT_CurrentCluster]
  1128 000074AC 3B4678              <1> 	cmp	eax, [esi+LD_Clusters]
  1129 000074AF 77E8                <1> 	ja	short retn_from_get_free_fat_clusters
  1130 000074B1 40                  <1> 	inc	eax
  1131                              <1> 	;mov	[FAT_CurrentCluster], eax
  1132 000074B2 EBDA                <1> 	jmp	short loc_gfc_loop_get_next_cluster
  1133                              <1> 
  1134                              <1> floppy_drv_init:
  1135                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
  1136                              <1> 	; 09/12/2017
  1137                              <1> 	; 06/07/2016
  1138                              <1> 	; 10/01/2016 (TRDOS 386 = TRDOS v2.0)
  1139                              <1> 	; 24/07/2011
  1140                              <1> 	; 04/07/2009
  1141                              <1> 	; INPUT ->
  1142                              <1> 	;	DL = Drive number (0,1)
  1143                              <1> 	; OUTPUT ->
  1144                              <1> 	;	BL = drive name
  1145                              <1> 	;	BH = drive number
  1146                              <1> 	;	ESI = Logical DOS drv description table
  1147                              <1> 	;	EAX = Volume serial number
  1148                              <1>  
  1149 000074B4 BE[7C650000]        <1> 	mov	esi, fd0_type ; 10/01/2016
  1150 000074B9 BF00010900          <1> 	mov	edi, Logical_DOSDisks
  1151 000074BE 08D2                <1> 	or	dl, dl
  1152 000074C0 7407                <1> 	jz	short loc_drv_init_fd0_fd1
  1153 000074C2 81C700010000        <1> 	add	edi, 100h
  1154 000074C8 46                  <1> 	inc	esi ; fd1_type ; 10/01/2016
  1155                              <1> loc_drv_init_fd0_fd1:
  1156 000074C9 C6477E00            <1> 	mov	byte [edi+LD_MediaChanged], 0
  1157 000074CD 803E01              <1> 	cmp	byte [esi], 1 ; type (>0 if it is existing) 
  1158                              <1> 		; 4 = 1.44 MB, 80 track, 3 1/2"
  1159 000074D0 7221                <1> 	jb	short read_fd_boot_sector_retn
  1160 000074D2 885702              <1> 	mov	[edi+LD_PhyDrvNo], dl
  1161                              <1> read_fd_boot_sector:
  1162 000074D5 30F6                <1> 	xor	dh, dh
  1163 000074D7 B904000000          <1> 	mov	ecx, 4 ; Retry Count
  1164                              <1> read_fd_boot_sector_again:
  1165 000074DC 51                  <1> 	push 	ecx
  1166                              <1> 	;mov	cx, 1
  1167 000074DD B101                <1> 	mov	cl, 1
  1168 000074DF 66B80102            <1> 	mov	ax, 0201h ; Read 1 sector
  1169 000074E3 BB[1A7D0100]        <1> 	mov	ebx, DOSBootSectorBuff
  1170 000074E8 E8A8DAFFFF          <1> 	call	int13h
  1171 000074ED 59                  <1> 	pop	ecx
  1172 000074EE 7304                <1> 	jnc	short use_fd_boot_sector_params
  1173 000074F0 E2EA                <1> 	loop	read_fd_boot_sector_again
  1174                              <1> 
  1175                              <1> read_fd_boot_sector_stc_retn:
  1176 000074F2 F9                  <1> 	stc
  1177                              <1> read_fd_boot_sector_retn:
  1178 000074F3 C3                  <1> 	retn
  1179                              <1> 
  1180                              <1> use_fd_boot_sector_params:
  1181                              <1> 	;mov	esi, DOSBootSectorBuff
  1182 000074F4 89DE                <1> 	mov	esi, ebx
  1183 000074F6 6681BEFE01000055AA  <1> 	cmp	word [esi+BS_Validation], 0AA55h
  1184 000074FF 75F1                <1> 	jne	short read_fd_boot_sector_stc_retn
  1185 00007501 66817E035346        <1>         cmp     word [esi+bs_FS_Identifier], 'SF'
  1186                              <1> 	;jne	use_fd_fatfs_boot_sector_params
  1187                              <1> 	; 25/07/2022
  1188 00007507 7405                <1> 	je	short use_fdfs_boot_sector_params
  1189 00007509 E9A1000000          <1> 	jmp	use_fd_fatfs_boot_sector_params	
  1190                              <1> use_fdfs_boot_sector_params:
  1191 0000750E 8A462D              <1> 	mov	al, [esi+bs_FS_LBA_Ready]
  1192 00007511 884705              <1> 	mov	[edi+LD_FS_LBAYes], al
  1193                              <1> 	;
  1194                              <1> 	; 03/01/2010 CHS -> DOS FAT/BPB compatibility fix
  1195 00007514 8A4608              <1> 	mov	al, [esi+bs_FS_MediaAttrib]
  1196 00007517 884706              <1> 	mov	[edi+LD_FS_MediaAttrib], al
  1197                              <1> 	;
  1198 0000751A 8A460A              <1>         mov	al, [esi+bs_FS_VersionMaj]
  1199 0000751D 884707              <1> 	mov	byte [edi+LD_FS_VersionMajor], al
  1200 00007520 668B4606            <1> 	mov	ax, [esi+bs_FS_BytesPerSec]
  1201 00007524 66894711            <1> 	mov	[edi+LD_FS_BytesPerSec], ax
  1202 00007528 8A462E              <1> 	mov	al, [esi+bs_FS_SecPerTrack]
  1203 0000752B 28E4                <1> 	sub	ah, ah ; 09/12/2017
  1204 0000752D 6689471E            <1> 	mov	[edi+LD_FS_SecPerTrack], ax
  1205 00007531 8A462F              <1> 	mov	al, [esi+bs_FS_Heads]
  1206 00007534 66894720            <1> 	mov	[edi+LD_FS_NumHeads], ax
  1207                              <1> 	;
  1208 00007538 8B4628              <1> 	mov	eax, [esi+bs_FS_UnDelDirD]
  1209 0000753B 894722              <1> 	mov	[edi+LD_FS_UnDelDirD], eax
  1210 0000753E 8B4618              <1> 	mov	eax, [esi+bs_FS_MATLocation]
  1211 00007541 89470C              <1> 	mov	[edi+LD_FS_MATLocation], eax
  1212 00007544 8B461C              <1> 	mov	eax, [esi+bs_FS_RootDirD]
  1213 00007547 894708              <1> 	mov	[edi+LD_FS_RootDirD], eax
  1214 0000754A 8B460C              <1> 	mov	eax, [esi+bs_FS_BeginSector]
  1215 0000754D 89476C              <1> 	mov	[edi+LD_FS_BeginSector], eax
  1216 00007550 8B4610              <1> 	mov	eax, [esi+bs_FS_VolumeSize]
  1217 00007553 894770              <1> 	mov	[edi+LD_FS_VolumeSize], eax
  1218                              <1> 	;		
  1219 00007556 89FE                <1> 	mov	esi, edi
  1220 00007558 8B460C              <1>  	mov	eax, [esi+LD_FS_MATLocation]
  1221                              <1> 	;add	eax, [edi+LD_FS_BeginSector]
  1222                              <1> read_fd_MAT_sector_again:
  1223                              <1> 	;mov	ebx, DOSBootSectorBuff
  1224                              <1> 	;mov	ecx, 1
  1225 0000755B B101                <1> 	mov	cl, 1
  1226 0000755D E849A80000          <1> 	call	chs_read
  1227 00007562 89DE                <1> 	mov	esi, ebx
  1228                              <1> 	;jnc	short use_fdfs_mat_sector_params
  1229                              <1> 	;jmp	short read_fd_boot_sector_retn
  1230                              <1> 	;retn
  1231                              <1> 	; 25/07/2022
  1232 00007564 7248                <1> 	jc	short read_fd_RDT_sector_retn
  1233                              <1> use_fdfs_mat_sector_params:
  1234 00007566 8B460C              <1> 	mov	eax, [esi+FS_MAT_DATLocation]
  1235 00007569 894714              <1> 	mov	[edi+LD_FS_DATLocation], eax
  1236 0000756C 8B4610              <1> 	mov	eax, [esi+FS_MAT_DATScount]
  1237 0000756F 894718              <1> 	mov	[edi+LD_FS_DATSectors], eax
  1238 00007572 8B4714              <1> 	mov	eax, [edi+FS_MAT_FreeSectors]
  1239 00007575 894774              <1> 	mov	[edi+LD_FS_FreeSectors], eax
  1240 00007578 8B4618              <1> 	mov	eax, [esi+FS_MAT_FirstFreeSector]
  1241 0000757B 894778              <1> 	mov	[edi+LD_FS_FirstFreeSector], eax
  1242                              <1> 	;
  1243 0000757E 89FE                <1> 	mov	esi, edi
  1244 00007580 8B4608              <1>  	mov	eax, [esi+LD_FS_RootDirD]
  1245                              <1> read_fd_RDT_sector_again:
  1246                              <1> 	;mov	ebx, DOSBootSectorBuff
  1247                              <1> 	;mov	cx, 1
  1248 00007583 B101                <1> 	mov	cl, 1
  1249 00007585 E821A80000          <1> 	call	chs_read
  1250 0000758A 89DE                <1> 	mov	esi, ebx
  1251 0000758C 7220                <1> 	jc	short read_fd_RDT_sector_retn
  1252                              <1> use_fdfs_RDT_sector_params:
  1253 0000758E 8B461C              <1> 	mov	eax, [esi+FS_RDT_VolumeSerialNo]
  1254 00007591 894728              <1> 	mov	[edi+LD_FS_VolumeSerial], eax
  1255 00007594 57                  <1> 	push	edi
  1256                              <1> 	;mov	ecx, 16
  1257 00007595 B110                <1> 	mov	cl, 16	
  1258 00007597 83C640              <1> 	add	esi, FS_RDT_VolumeName
  1259 0000759A 83C72C              <1> 	add	edi, LD_FS_VolumeName
  1260 0000759D F3A5                <1> 	rep	movsd ; 64 bytes
  1261 0000759F 5E                  <1> 	pop	esi
  1262 000075A0 C6460300            <1> 	mov	byte [esi+LD_FATType], 0
  1263 000075A4 C64604A1            <1> 	mov	byte [esi+LD_FSType], 0A1h  
  1264 000075A8 E9A2000000          <1>         jmp     loc_cont_use_fd_boot_sector_params
  1265                              <1> 
  1266                              <1> read_fd_RDT_sector_stc_retn:
  1267 000075AD F9                  <1> 	stc
  1268                              <1> read_fd_RDT_sector_retn:
  1269 000075AE C3                  <1> 	retn
  1270                              <1> 
  1271                              <1> use_fd_fatfs_boot_sector_params:
  1272 000075AF 807E2629            <1> 	cmp	byte [esi+BS_BootSig], 29h
  1273 000075B3 75F8                <1> 	jne	short read_fd_RDT_sector_stc_retn
  1274 000075B5 807E15F0            <1> 	cmp	byte [esi+BPB_Media], 0F0h
  1275 000075B9 72F3                <1> 	jb	short read_fd_RDT_sector_retn
  1276 000075BB 57                  <1> 	push	edi
  1277 000075BC 83C706              <1> 	add	edi, LD_BPB
  1278                              <1> 	;mov	ecx, 16
  1279 000075BF B110                <1> 	mov	cl, 16
  1280 000075C1 F3A5                <1> 	rep	movsd ; 64 bytes 
  1281 000075C3 5E                  <1> 	pop	esi
  1282 000075C4 31C0                <1> 	xor	eax, eax
  1283 000075C6 89466C              <1> 	mov	[esi+LD_StartSector], eax ; 0
  1284 000075C9 668B461C            <1> 	mov	ax, [esi+LD_BPB+BPB_FATSz16]
  1285 000075CD 8A4E16              <1> 	mov	cl, [esi+LD_BPB+BPB_NumFATs] 
  1286 000075D0 F7E1                <1>   	mul	ecx
  1287                              <1> 	; edx = 0 !
  1288 000075D2 668B5614            <1> 	mov	dx, [esi+LD_BPB+BPB_RsvdSecCnt]
  1289 000075D6 66895660            <1> 	mov	[esi+LD_FATBegin], dx
  1290                              <1> 	; 25/07/2022
  1291 000075DA 01D0                <1> 	add	eax, edx
  1292                              <1> 	;add	ax, dx
  1293 000075DC 894664              <1> 	mov	[esi+LD_ROOTBegin], eax
  1294 000075DF 894668              <1> 	mov	[esi+LD_DATABegin], eax 
  1295 000075E2 668B5617            <1> 	mov	dx, [esi+LD_BPB+BPB_RootEntCnt]
  1296                              <1> 	;;shl	edx, 5 ; * 32 (Size of a directory entry)
  1297                              <1> 	;shl	dx, 5
  1298                              <1> 	;;add	edx, 511
  1299                              <1> 	;add	dx, 511
  1300                              <1> 	;;shr	edx, 9 ; edx = ((edx*32)+511) / 512
  1301                              <1> 	;shr	dx, 9
  1302 000075E6 6683C20F            <1> 	add	dx, 15 ; 06/07/2016 (+(512/32)-1)
  1303                              <1> 	;shr	dx, 4 ; / 16 (==16 entries per sector)
  1304                              <1> 	; 25/07/2022
  1305 000075EA C1EA04              <1> 	shr	edx, 4
  1306 000075ED 015668              <1> 	add 	[esi+LD_DATABegin], edx ; + rd sectors
  1307                              <1> 	;movzx	eax, word [esi+LD_BPB+BPB_TotalSec16]
  1308 000075F0 668B4619            <1> 	mov	ax, [esi+LD_BPB+BPB_TotalSec16]
  1309 000075F4 894670              <1> 	mov	[esi+LD_TotalSectors], eax
  1310 000075F7 2B4668              <1> 	sub	eax, [esi+LD_DATABegin]
  1311                              <1>   	;movzx	ecx, byte [esi+LD_BPB+BPB_SecPerClust]
  1312 000075FA 8A4E13              <1> 	mov	cl, [esi+LD_BPB+BPB_SecPerClust]  
  1313 000075FD 80F901              <1> 	cmp	cl, 1
  1314 00007600 7604                <1> 	jna	short save_fd_fatfs_cluster_count
  1315                              <1> 	; 25/07/2022
  1316 00007602 29D2                <1> 	sub	edx, edx
  1317                              <1> 	;sub	dx, dx ; 0
  1318                              <1> 	;sub	dl, dl ; 06/07/2016
  1319 00007604 F7F1                <1> 	div	ecx
  1320                              <1> save_fd_fatfs_cluster_count:
  1321 00007606 894678              <1> 	mov	[esi+LD_Clusters], eax
  1322                              <1> 
  1323                              <1>       ; Maximum Valid Cluster Number = EAX +1
  1324                              <1>       ; with 2 reserved clusters= EAX +2
  1325                              <1>  
  1326                              <1> reset_FAT_buffer_decriptors:
  1327 00007609 29C0                <1> 	sub	eax, eax ; 0  
  1328 0000760B A2[1E7F0100]        <1> 	mov	[FAT_BuffValidData], al ; 0
  1329 00007610 A2[1F7F0100]        <1> 	mov	[FAT_BuffDrvName], al ; 0
  1330 00007615 A3[227F0100]        <1> 	mov	[FAT_BuffSector], eax ; 0
  1331                              <1> 
  1332                              <1> read_fd_FAT_sectors:
  1333 0000761A BB001C0900          <1>   	mov	ebx, FAT_Buffer
  1334 0000761F 668B4614            <1> 	mov	ax, [esi+LD_BPB+BPB_RsvdSecCnt]
  1335                              <1> 	;mov	ecx, 3
  1336 00007623 B103                <1> 	mov	cl, 3 ; 3 sectors
  1337 00007625 E881A70000          <1> 	call	chs_read
  1338 0000762A 7240                <1> 	jc	short read_fd_FAT_sectors_retn
  1339                              <1> use_fd_FAT_sectors:
  1340 0000762C 8A4602              <1> 	mov	al, [esi+LD_PhyDrvNo]
  1341 0000762F 0441                <1> 	add	al, 'A' 
  1342 00007631 A2[1F7F0100]        <1> 	mov	[FAT_BuffDrvName], al 
  1343 00007636 C605[1E7F0100]01    <1>  	mov	byte [FAT_BuffValidData], 1
  1344 0000763D E82B000000          <1> 	call	fd_init_calculate_free_clusters
  1345 00007642 7228                <1> 	jc	short read_fd_FAT_sectors_retn
  1346                              <1>   
  1347                              <1> loc_use_fd_boot_sector_params_FAT:
  1348 00007644 C6460301            <1> 	mov	byte [esi+LD_FATType], 1 ; FAT 12
  1349 00007648 C6460401            <1> 	mov	byte [esi+LD_FSType], 1
  1350 0000764C 8B462D              <1>         mov     eax, [esi+LD_BPB+VolumeID]
  1351                              <1> loc_cont_use_fd_boot_sector_params:
  1352 0000764F 8A7E02              <1> 	mov	bh, [esi+LD_PhyDrvNo]
  1353 00007652 887E7D              <1> 	mov	[esi+LD_DParamEntry], bh
  1354 00007655 88FB                <1> 	mov	bl, bh
  1355 00007657 80C341              <1> 	add	bl, 'A'
  1356 0000765A 881E                <1> 	mov	byte [esi+LD_Name], bl
  1357 0000765C C6460101            <1> 	mov	byte [esi+LD_DiskType], 1
  1358 00007660 C6460500            <1> 	mov	byte [esi+LD_LBAYes], 0
  1359 00007664 C6467C00            <1> 	mov	byte [esi+LD_PartitionEntry], 0
  1360 00007668 C6467E06            <1> 	mov	byte [esi+LD_MediaChanged], 6 ; Volume Name Reset
  1361                              <1> 
  1362                              <1> read_fd_FAT_sectors_retn:
  1363 0000766C C3                  <1> 	retn   
  1364                              <1> 
  1365                              <1> fd_init_calculate_free_clusters:
  1366                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
  1367                              <1> 	; 09/12/2017
  1368                              <1> 	; 10/01/2016 (TRDOS 386 = TRDOS v2.0)
  1369                              <1> 	; 04/07/2009
  1370                              <1> 	; INPUT ->
  1371                              <1> 	;     ESI = Logical DOS drive description table address
  1372                              <1> 	; OUTPUT ->
  1373                              <1> 	;    [ESI+LD_FreeSectors] will be set
  1374                              <1> 	
  1375 0000766D 29C0                <1> 	sub	eax, eax
  1376 0000766F 894674              <1> 	mov	[esi+LD_FreeSectors], eax ; 0
  1377 00007672 B002                <1> 	mov	al, 2 ; eax = 2
  1378                              <1> 
  1379                              <1> fd_init_loop_get_next_cluster:
  1380 00007674 E828000000          <1> 	call	fd_init_get_next_cluster
  1381 00007679 7225                <1> 	jc	short fd_init_calculate_free_clusters_retn
  1382                              <1> 
  1383                              <1> fd_init_free_fat_clusters:
  1384                              <1> 	;cmp 	eax, 0
  1385                              <1> 	;ja	short fd_init_pass_inc_free_cluster_count
  1386                              <1> 	;and	eax, eax
  1387                              <1> 	;jnz	short fd_init_pass_inc_free_cluster_count
  1388                              <1> 	;and	ax, ax
  1389 0000767B 21C0                <1> 	and	eax, eax ; 25/07/2022
  1390 0000767D 7503                <1> 	jnz	short fd_init_pass_inc_free_cluster_count
  1391                              <1> 	; 25/07/2022
  1392 0000767F FF4674              <1> 	inc	dword [esi+LD_FreeSectors]
  1393                              <1>         ;inc	word [esi+LD_FreeSectors]
  1394                              <1>     
  1395                              <1> fd_init_pass_inc_free_cluster_count:
  1396                              <1>   	; 25/07/2022
  1397 00007682 A1[1A7F0100]        <1> 	mov	eax, [FAT_CurrentCluster]
  1398                              <1> 	;mov	ax, [FAT_CurrentCluster]
  1399 00007687 3B4678              <1> 	cmp	eax, [esi+LD_Clusters]
  1400                              <1> 	;cmp	ax, [esi+LD_Clusters]
  1401 0000768A 7703                <1> 	ja	short short retn_from_fd_init_calculate_free_clusters
  1402 0000768C 40                  <1> 	inc	eax
  1403                              <1> 	;inc	ax
  1404 0000768D EBE5                <1> 	jmp	short fd_init_loop_get_next_cluster
  1405                              <1> 
  1406                              <1> retn_from_fd_init_calculate_free_clusters:
  1407                              <1> 	; 25/07/2022
  1408                              <1> 	;xor	eax, eax
  1409 0000768F 30E4                <1> 	xor	ah, ah
  1410 00007691 8A4613              <1>   	mov	al, [esi+LD_BPB+BPB_SecPerClust]
  1411 00007694 3C01                <1>   	cmp	al, 1
  1412 00007696 7608                <1> 	jna	short fd_init_calculate_free_clusters_retn
  1413                              <1> 	;;movzx	eax, al
  1414                              <1> 	;xor	ah, ah ; 09/12/2017
  1415                              <1> 	; 25/07/2022
  1416 00007698 8B4E74              <1> 	mov	ecx, [esi+LD_FreeSectors]
  1417                              <1> 	;mov	cx, [esi+LD_FreeSectors] ; Count of free clusters
  1418 0000769B F7E1                <1>   	mul	ecx
  1419                              <1> 	;mul	cx
  1420 0000769D 894674              <1> 	mov	[esi+LD_FreeSectors], eax
  1421                              <1> 	;mov	[esi+LD_FreeSectors], ax
  1422                              <1> fd_init_calculate_free_clusters_retn:
  1423 000076A0 C3                  <1> 	retn
  1424                              <1> 
  1425                              <1> fd_init_get_next_cluster:
  1426                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
  1427                              <1> 	; 04/02/2016
  1428                              <1> 	; 02/02/2016
  1429                              <1> 	; 10/01/2016 (TRDOS 386 = TRDOS v2.0)
  1430                              <1> 	; 04/07/2009
  1431                              <1> 	; INPUT ->
  1432                              <1> 	;    EAX = Current cluster
  1433                              <1> 	;    ESI = Logical DOS drive description table address
  1434                              <1> 	;    EDX = 0
  1435                              <1> 	; OUTPUT ->
  1436                              <1> 	;    EAX = Next cluster
  1437                              <1> 
  1438 000076A1 A3[1A7F0100]        <1> 	mov	[FAT_CurrentCluster], eax
  1439                              <1> fd_init_get_next_cluster_readnext:
  1440 000076A6 29D2                <1> 	sub	edx, edx ; 0
  1441 000076A8 BB00040000          <1>   	mov	ebx, 1024 ; 400h
  1442 000076AD F7F3                <1>   	div	ebx
  1443                              <1>   	; EAX = Count of 3 FAT sectors
  1444                              <1>   	; EDX = Buffer entry index
  1445 000076AF 89C1                <1> 	mov	ecx, eax
  1446                              <1> 	;mov	eax, 3
  1447 000076B1 B003                <1> 	mov	al, 3
  1448 000076B3 F7E2                <1> 	mul	edx ; Multiply by 3
  1449                              <1> 	;shr	ax, 1 ; Divide by 2
  1450                              <1> 	; 25/07/2022
  1451 000076B5 D1E8                <1> 	shr	eax, 1
  1452 000076B7 89C3                <1> 	mov	ebx, eax ; Buffer byte offset
  1453 000076B9 81C3001C0900        <1> 	add	ebx, FAT_Buffer
  1454 000076BF 89C8                <1> 	mov	eax, ecx
  1455                              <1> 	;mov	edx, 3
  1456 000076C1 66BA0300            <1> 	mov	dx, 3
  1457 000076C5 F7E2                <1> 	mul	edx 
  1458                              <1>   	; EAX = FAT Beginning Sector
  1459                              <1> 	; EDX = 0
  1460 000076C7 8A0E                <1> 	mov	cl, [esi+LD_Name]
  1461                              <1> 	;cmp	byte [FAT_BuffValidData], 0
  1462                              <1> 	;jna	short fd_init_load_FAT_sectors0
  1463 000076C9 3A0D[1F7F0100]      <1> 	cmp	cl, [FAT_BuffDrvName]
  1464 000076CF 751D                <1> 	jne	short fd_init_load_FAT_sectors0
  1465 000076D1 3B05[227F0100]      <1> 	cmp	eax, [FAT_BuffSector]
  1466 000076D7 751B                <1> 	jne	short fd_init_load_FAT_sectors1
  1467                              <1> 	; 25/07/2022
  1468 000076D9 A1[1A7F0100]        <1> 	mov	eax, [FAT_CurrentCluster]
  1469                              <1> 	;mov	al, [FAT_CurrentCluster]
  1470 000076DE D1E8                <1> 	shr	eax, 1
  1471                              <1> 	;shr	al, 1
  1472 000076E0 668B03              <1> 	mov	ax, [ebx]
  1473 000076E3 7305                <1>   	jnc	short fd_init_gnc_even
  1474                              <1> 	;shr	ax, 4
  1475                              <1> 	; 25/04/2022
  1476 000076E5 C1E804              <1> 	shr	eax, 4
  1477                              <1> fd_init_gnc_clc_retn:
  1478 000076E8 F8                  <1> 	clc
  1479 000076E9 C3                  <1> 	retn
  1480                              <1> 
  1481                              <1> fd_init_gnc_even:
  1482 000076EA 80E40F              <1> 	and	ah, 0Fh
  1483 000076ED C3                  <1> 	retn
  1484                              <1> 
  1485                              <1> fd_init_load_FAT_sectors0:
  1486 000076EE 880D[1F7F0100]      <1> 	mov 	[FAT_BuffDrvName], cl
  1487                              <1> fd_init_load_FAT_sectors1:
  1488 000076F4 C605[1E7F0100]00    <1> 	mov	byte [FAT_BuffValidData], 0
  1489 000076FB A3[227F0100]        <1> 	mov	[FAT_BuffSector], eax
  1490 00007700 034660              <1> 	add	eax, [esi+LD_FATBegin]
  1491 00007703 BB001C0900          <1>  	mov	ebx, FAT_Buffer
  1492                              <1> 	;movzx	ecx, word [esi+LD_BPB+BPB_FATSz16]
  1493 00007708 668B4E1C            <1> 	mov	cx, [esi+LD_BPB+BPB_FATSz16]
  1494                              <1> 	;sub	cx, [FAT_BuffSector]
  1495                              <1>         ; 25/07/2022
  1496 0000770C 2B0D[227F0100]      <1> 	sub	ecx, [FAT_BuffSector] 
  1497                              <1> 	;sub	edx, edx
  1498 00007712 B203                <1> 	mov	dl, 3
  1499                              <1> 	; edx = 3 
  1500                              <1> 	;;cmp	ecx, 3
  1501                              <1> 	;cmp	cx, 3
  1502 00007714 39D1                <1> 	cmp	ecx, edx ; 3
  1503 00007716 7602                <1> 	jna	short fdinit_pass_fix_sector_count_3
  1504                              <1> 	;;mov	ecx, 3
  1505                              <1> 	;mov	ecx, 3
  1506 00007718 89D1                <1> 	mov	ecx, edx ; 3
  1507                              <1> fdinit_pass_fix_sector_count_3:  
  1508 0000771A E88CA60000          <1> 	call	chs_read
  1509 0000771F 730D                <1> 	jnc	short fd_init_FAT_sectors_no_load_error
  1510 00007721 C605[1E7F0100]00    <1> 	mov	byte [FAT_BuffValidData], 0
  1511                              <1> 		; Drv not ready or read Error !
  1512 00007728 B80F000000          <1> 	mov	eax, ERR_DRV_NOT_RDY ; 15
  1513                              <1> 	;xor	edx, edx
  1514 0000772D C3                  <1> 	retn
  1515                              <1> 
  1516                              <1> fd_init_FAT_sectors_no_load_error:
  1517 0000772E C605[1E7F0100]01    <1> 	mov	byte [FAT_BuffValidData], 1
  1518 00007735 A1[1A7F0100]        <1> 	mov	eax, [FAT_CurrentCluster]
  1519 0000773A E967FFFFFF          <1>         jmp     fd_init_get_next_cluster_readnext
  1520                              <1> 
  1521                              <1> get_FAT_volume_name:
  1522                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
  1523                              <1> 	; 10/01/2016 (TRDOS 386 = TRDOS v2.0)
  1524                              <1> 	; 12/09/2009
  1525                              <1> 	; INPUT ->
  1526                              <1> 	;	BH = Logical DOS drive number (0,1,2,3,4 ...)
  1527                              <1> 	;       BL = 0
  1528                              <1> 	; OUTPUT ->
  1529                              <1> 	;	CF = 0 -> ESI = Volume name address
  1530                              <1> 	; 	CF = 1 -> Root volume name not found
  1531                              <1> 
  1532                              <1> 	;mov 	ah, 0FFh
  1533                              <1> 	;mov 	al, [Last_Dos_DiskNo]
  1534                              <1> 	;cmp 	al, bh
  1535                              <1> 	;jb     short loc_gfvn_dir_load_err
  1536                              <1> 
  1537 0000773F 89DE                <1> 	mov	esi, ebx
  1538 00007741 81E600FF0000        <1> 	and	esi, 0FF00h ; esi = bh
  1539 00007747 81C600010900        <1> 	add	esi, Logical_DOSDisks
  1540 0000774D 8A06                <1> 	mov     al, [esi+LD_Name]
  1541 0000774F 8A6603              <1> 	mov     ah, [esi+LD_FATType]
  1542 00007752 80FC01              <1> 	cmp     ah, 1
  1543 00007755 7210                <1> 	jb    	short loc_gfvn_dir_load_err
  1544 00007757 3C41                <1> 	cmp 	al, 'A'
  1545 00007759 720C                <1> 	jb      short loc_gfvn_dir_load_err
  1546 0000775B 80FC02              <1> 	cmp 	ah, 2 
  1547 0000775E 7708                <1> 	ja      short get_FAT32_root_cluster
  1548                              <1> 	
  1549 00007760 E8E04B0000          <1> 	call    load_FAT_root_directory
  1550 00007765 730B                <1> 	jnc     short loc_get_volume_name
  1551                              <1> 
  1552                              <1> loc_gfvn_dir_load_err:
  1553                              <1> loc_get_volume_name_retn: ; 29/08/2023
  1554 00007767 C3                  <1> 	retn
  1555                              <1> 
  1556                              <1> get_FAT32_root_cluster:
  1557 00007768 8B4632              <1> 	mov	eax, [esi+LD_BPB+BPB_RootClus]
  1558 0000776B E8534C0000          <1> 	call    load_FAT_sub_directory
  1559 00007770 72F5                <1> 	jc	short loc_get_volume_name_retn
  1560                              <1> 
  1561                              <1> loc_get_volume_name:
  1562 00007772 BE00000800          <1>         mov     esi, Directory_Buffer
  1563                              <1> 	;xor	cx, cx ; 0
  1564                              <1> 	; 25/07/2022
  1565 00007777 31C9                <1> 	xor	ecx, ecx ; 0
  1566                              <1> check_root_volume_name:
  1567 00007779 8A06                <1> 	mov	al, [esi]
  1568 0000777B 08C0                <1> 	or      al, al
  1569 0000777D 74E8                <1> 	jz      short loc_get_volume_name_retn
  1570 0000777F 807E0B08            <1> 	cmp     byte [esi+0Bh], 08h
  1571 00007783 74E2                <1> 	je      short loc_get_volume_name_retn
  1572 00007785 663B0D[347F0100]    <1> 	cmp     cx, [DirBuff_LastEntry]
  1573 0000778C 7306                <1> 	jnb     short pass_check_root_volume_name
  1574                              <1> 	;inc	cx
  1575                              <1> 	; 25/07/2022
  1576 0000778E 41                  <1> 	inc	ecx
  1577 0000778F 83C620              <1> 	add     esi, 32
  1578 00007792 EBE5                <1> 	jmp     short check_root_volume_name
  1579                              <1> 
  1580                              <1> 	; 29/08/2023
  1581                              <1> ;loc_get_volume_name_retn:
  1582                              <1> 	;retn
  1583                              <1>     
  1584                              <1> pass_check_root_volume_name:
  1585 00007794 803D[307F0100]03    <1> 	cmp	byte [DirBuff_FATType], 3
  1586 0000779B 7230                <1> 	jb	short loc_get_volume_name_retn_xor
  1587                              <1> 
  1588 0000779D BB001C0900          <1> 	mov	ebx, FAT_Buffer
  1589 000077A2 BE00010900          <1> 	mov	esi, Logical_DOSDisks
  1590 000077A7 31C0                <1> 	xor	eax, eax
  1591 000077A9 8A25[2F7F0100]      <1> 	mov	ah, [DirBuff_DRV]
  1592 000077AF 80EC41              <1> 	sub	ah, 'A' 
  1593 000077B2 01C6                <1> 	add	esi, eax
  1594 000077B4 A1[367F0100]        <1> 	mov	eax, [DirBuff_Cluster]
  1595 000077B9 E8494A0000          <1> 	call	get_next_cluster
  1596 000077BE 7305                <1> 	jnc 	short loc_gfvn_load_FAT32_dir_cluster
  1597                              <1>   	
  1598 000077C0 83F801              <1> 	cmp     eax, 1
  1599 000077C3 F5                  <1> 	cmc
  1600 000077C4 C3                  <1> 	retn
  1601                              <1>   
  1602                              <1> loc_gfvn_load_FAT32_dir_cluster:
  1603 000077C5 E8F94B0000          <1> 	call	load_FAT_sub_directory
  1604 000077CA 73A6                <1> 	jnc	short loc_get_volume_name
  1605 000077CC C3                  <1> 	retn
  1606                              <1> 
  1607                              <1> loc_get_volume_name_retn_xor:
  1608 000077CD 31C0                <1> 	xor 	eax, eax
  1609 000077CF C3                  <1> 	retn
  1610                              <1> 
  1611                              <1> get_media_change_status:
  1612                              <1> 	; 10/01/2016 (TRDOS 386 = TRDOS v2.0)
  1613                              <1> 	; 09/09/2009
  1614                              <1> 	; INPUT:
  1615                              <1> 	;     DL = Drive number (physical)
  1616                              <1> 	; OUTPUT: clc & AH = 6 media changed
  1617                              <1> 	;     clc & AH = 0 media not changed         
  1618                              <1> 	;     stc -> Drive not ready or an error 
  1619                              <1>   
  1620 000077D0 B416                <1> 	mov	ah, 16h
  1621 000077D2 E8BED7FFFF          <1>   	call	int13h
  1622 000077D7 80FC06              <1> 	cmp	ah, 06h
  1623 000077DA 7405                <1> 	je	short loc_gmc_status_retn
  1624 000077DC 08E4                <1> 	or	ah, ah
  1625 000077DE 7401                <1> 	jz	short loc_gmc_status_retn
  1626                              <1> loc_gmc_status_stc_retn:    
  1627 000077E0 F9                  <1> 	stc
  1628                              <1> loc_gmc_status_retn:
  1629 000077E1 C3                  <1> 	retn
  3309                                  %include 'trdosk3.s' ; 06/01/2016
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.6) - MAIN PROGRAM : trdosk3.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 30/08/2023  (Previous: 07/08/2022)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 06/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Derived from TRDOS Operating System v1.0 (8086) source code by Erdogan Tan
    11                              <1> ; MAINPROG.ASM (09/11/2011)
    12                              <1> ; ****************************************************************************
    13                              <1> ; MAINPROG.ASM [ TRDOS KERNEL - COMMAND EXECUTER SECTION - MAIN PROGRAM ]
    14                              <1> ; (c) 2004-2011  Erdogan TAN  [ 17/01/2004 ]  Last Update: 09/11/2011
    15                              <1> ; CMD_INTR.ASM [ TRDOS Command Interpreter Procedure ] Last Update: 09/11/2011
    16                              <1> ; DIR.ASM [ DIRECTORY FUNCTIONS ] Last Update: 09/10/2011
    17                              <1> ; FILE.ASM [ FILE FUNCTIONS ] Last Update: 09/10/2011
    18                              <1> 
    19                              <1> change_current_drive:
    20                              <1> 	; 26/07/2022 (TRDOS 386 Kernel v2.0.5)
    21                              <1> 	; 16/10/2016
    22                              <1> 	; 02/02/2016
    23                              <1> 	; 15/01/2016 (TRDOS 386 = TRDOS v2.0)
    24                              <1> 	; 18/08/2011
    25                              <1> 	; 09/09/2009
    26                              <1> 	; INPUT:
    27                              <1> 	;   DL = Logical DOS Drive Number
    28                              <1> 	; OUTPUT:
    29                              <1> 	;  cf=1 -> Not successful
    30                              <1> 	;   EAX = Error code
    31                              <1> 	;  cf=0 ->
    32                              <1> 	;   EAX = 0 (successful)
    33                              <1> 
    34 000077E2 31DB                <1> 	xor	ebx, ebx
    35 000077E4 88D7                <1> 	mov	bh, dl
    36                              <1> 
    37                              <1> 	;cmp	dl, 1
    38                              <1> 	;jna	short loc_ccdrv_initial_media_change_check
    39                              <1> 	;cmp	bh, [Last_Dos_DiskNo]
    40                              <1> 	;ja	short loc_ccdrv_drive_not_ready_err
    41                              <1> 
    42                              <1> loc_ccdrv_initial_media_change_check:
    43 000077E6 BE00010900          <1> 	mov	esi, Logical_DOSDisks
    44 000077EB 01DE                <1> 	add	esi, ebx
    45                              <1> loc_ccdrv_dos_drive_name_check:
    46 000077ED 80FA02              <1> 	cmp	dl, 2
    47 000077F0 720E                <1> 	jb	short loc_ccdrv_dos_drive_name_check_ok
    48                              <1> 
    49 000077F2 8A06                <1> 	mov	al, [esi+LD_Name]
    50 000077F4 2C41                <1> 	sub	al, 'A'
    51 000077F6 38D0                <1> 	cmp	al, dl
    52 000077F8 7406                <1> 	je	short loc_ccdrv_dos_drive_name_check_ok
    53                              <1> 
    54                              <1> loc_ccdrv_drive_not_ready_err:
    55                              <1> 	; 16/10/2016 (15h -> 15)
    56                              <1> 	;mov	eax, 15 ; Drive not ready
    57                              <1> 	; 26/07/2022
    58 000077FA 29C0                <1> 	sub	eax, eax
    59 000077FC B00F                <1> 	mov	al, 15
    60                              <1> loc_change_current_drive_stc_retn:
    61 000077FE F9                  <1> 	stc
    62 000077FF C3                  <1> 	retn  
    63                              <1> 
    64                              <1> loc_ccdrv_dos_drive_name_check_ok:
    65 00007800 8A667E              <1> 	mov	ah, [esi+LD_MediaChanged]
    66 00007803 80FC06              <1> 	cmp	ah, 6  ; VOLUME NAME CHECK/MOVE SIGN
    67 00007806 7455                <1> 	je	short loc_ccdrv_get_FAT_volume_name_0
    68                              <1> 
    69 00007808 80FA01              <1> 	cmp	dl, 1
    70 0000780B 777D                <1> 	ja	short loc_gmcs_init_drv_hd
    71                              <1> 
    72                              <1> loc_gmcs_init_drv_fd:
    73 0000780D 08E4                <1> 	or	ah, ah 
    74                              <1> 	; AH = 1 is initialization sign (invalid_fd_parameter)
    75 0000780F 7517                <1> 	jnz	short loc_ccdrv_call_fd_init
    76                              <1> 
    77 00007811 E8BAFFFFFF          <1> 	call	get_media_change_status
    78 00007816 72E2                <1> 	jc	short loc_ccdrv_drive_not_ready_err
    79                              <1> 
    80 00007818 20E4                <1> 	and	ah, ah
    81 0000781A 7476                <1> 	jz	short loc_change_current_drv3
    82                              <1> 
    83 0000781C 80F406              <1> 	xor	ah, 6
    84 0000781F 75D9                <1> 	jnz	short loc_ccdrv_drive_not_ready_err
    85                              <1> 
    86                              <1> loc_ccdrv_call_fd_init_check_vol_id:
    87 00007821 E86D090000          <1> 	call	get_volume_serial_number
    88 00007826 730D                <1> 	jnc	short loc_ccdrv_check_vol_serial
    89                              <1> 
    90                              <1> loc_ccdrv_call_fd_init:
    91 00007828 E887FCFFFF          <1> 	call	floppy_drv_init
    92 0000782D 731A                <1> 	jnc	short loc_reset_drv_fd_current_dir
    93                              <1> 
    94                              <1> loc_ccdrv_fdinit_fail_retn:
    95                              <1> 	; 16/10/2016
    96 0000782F B80F000000          <1> 	mov	eax, 15 ; Drive not ready
    97 00007834 C3                  <1> 	retn
    98                              <1> 
    99                              <1> loc_ccdrv_check_vol_serial:
   100 00007835 A3[00780100]        <1> 	mov	[Current_VolSerial], eax
   101                              <1> 	;mov	dl, bh
   102 0000783A E875FCFFFF          <1> 	call	floppy_drv_init
   103 0000783F 72EE                <1> 	jc	short loc_ccdrv_fdinit_fail_retn
   104                              <1> 
   105 00007841 3B05[00780100]      <1> 	cmp	eax, [Current_VolSerial]
   106 00007847 7445                <1> 	je	short loc_change_current_drv2
   107                              <1> 
   108                              <1> loc_reset_drv_fd_current_dir:
   109 00007849 31C0                <1> 	xor	eax, eax              
   110 0000784B 88467F              <1>         mov	[esi+LD_CDirLevel], al
   111 0000784E 89F7                <1> 	mov	edi, esi
   112 00007850 81C780000000        <1> 	add	edi, LD_CurrentDirectory
   113 00007856 B920000000          <1> 	mov	ecx, 32
   114 0000785B F3AB                <1> 	rep	stosd   
   115                              <1>  
   116                              <1> loc_ccdrv_get_FAT_volume_name_0:
   117 0000785D 8A4603              <1> 	mov	al, [esi+LD_FATType]
   118 00007860 08C0                <1> 	or	al, al
   119 00007862 742A                <1> 	jz	short loc_change_current_drv2
   120                              <1> 
   121 00007864 56                  <1> 	push	esi 
   122 00007865 3C02                <1> 	cmp	al, 2
   123 00007867 7705                <1> 	ja	short loc_ccdrv_get_FAT32_vol_name
   124                              <1>              
   125                              <1> loc_ccdrv_get_FAT2_16_vol_name:
   126 00007869 83C631              <1> 	add	esi, LD_BPB + VolumeLabel
   127 0000786C EB03                <1> 	jmp	short loc_ccdrv_get_FAT_volume_name_1
   128                              <1> 
   129                              <1> loc_ccdrv_get_FAT32_vol_name:
   130 0000786E 83C64D              <1> 	add	esi, LD_BPB + FAT32_VolLab
   131                              <1> loc_ccdrv_get_FAT_volume_name_1:
   132 00007871 53                  <1> 	push	ebx
   133 00007872 56                  <1> 	push	esi
   134 00007873 E8C7FEFFFF          <1> 	call	get_FAT_volume_name
   135 00007878 5F                  <1> 	pop	edi
   136 00007879 5B                  <1> 	pop	ebx
   137                              <1> 	; BL = 0
   138 0000787A 720B                <1> 	jc	short loc_change_current_drv1
   139 0000787C 20C0                <1> 	and	al, al
   140 0000787E 7407                <1> 	jz	short loc_change_current_drv1
   141                              <1> 
   142                              <1> loc_ccdrv_move_FAT_volume_name:
   143 00007880 B90B000000          <1> 	mov	ecx, 11
   144 00007885 F3A4                <1> 	rep	movsb
   145                              <1> 
   146                              <1> loc_change_current_drv1:
   147 00007887 5E                  <1> 	pop	esi
   148 00007888 EB04                <1> 	jmp	short loc_change_current_drv2
   149                              <1> 
   150                              <1> loc_gmcs_init_drv_hd:
   151 0000788A 08E4                <1> 	or	ah, ah
   152 0000788C 7404                <1> 	jz	short loc_change_current_drv3
   153                              <1> 	; BL = 0, BH = Logical DOS drive number
   154                              <1> loc_change_current_drv2:
   155 0000788E C6467E00            <1> 	mov	byte [esi+LD_MediaChanged], 0
   156                              <1> loc_change_current_drv3:
   157 00007892 883D[0A780100]      <1> 	mov	[Current_Drv], bh
   158                              <1> 
   159                              <1> 	;call	restore_current_directory
   160                              <1> 	;retn
   161                              <1> 
   162                              <1> restore_current_directory:
   163                              <1> 	; 26/07/2022 (TRDOS 386 Kernel v2.0.5)
   164                              <1> 	; 11/02/2016
   165                              <1> 	; 15/01/2016 (TRDOS 386 = TRDOS v2.0)
   166                              <1> 	; 25/01/2010
   167                              <1> 	; 12/10/2009
   168                              <1> 	;
   169                              <1> 	; INPUT:
   170                              <1> 	;   ESI = Logical DOS Drive Description Table
   171                              <1> 	;
   172                              <1> 	; OUTPUT:
   173                              <1> 	;   ESI = Logical DOS Drive Description Table
   174                              <1> 	;   EDI = offset Current_Dir_Drv 
   175                              <1> 
   176 00007898 8A4603              <1> 	mov	al, [esi+LD_FATType]
   177 0000789B A2[09780100]        <1> 	mov	[Current_FATType], al
   178                              <1> 
   179 000078A0 8A26                <1> 	mov	ah, [esi+LD_Name] 
   180 000078A2 8825[0B780100]      <1> 	mov	[Current_Dir_Drv], ah
   181                              <1> 
   182 000078A8 20C0                <1> 	and	al, al
   183 000078AA 741D                <1> 	jz	short loc_restore_FS_current_directory
   184                              <1> 
   185                              <1> loc_restore_FAT_current_directory:
   186 000078AC 8A667F              <1> 	mov	ah, [esi+LD_CDirLevel]
   187 000078AF 8825[08780100]      <1> 	mov	[Current_Dir_Level], ah
   188 000078B5 08E4                <1> 	or	ah, ah
   189 000078B7 7415                <1>         jz	short loc_ccdrv_reset_cdir_FAT_12_16_32_fcluster
   190                              <1> 
   191 000078B9 0FB6D4              <1> 	movzx	edx, ah
   192 000078BC C0E204              <1> 	shl	dl, 4 ; * 16
   193 000078BF 01F2                <1>         add	edx, esi
   194 000078C1 8B828C000000        <1> 	mov	eax, [edx+LD_CurrentDirectory+12]
   195 000078C7 EB29                <1> 	jmp	short loc_ccdrv_reset_cdir_FAT_fcluster
   196                              <1> 
   197                              <1> loc_restore_FS_current_directory:
   198                              <1> 	;call	load_current_FS_directory
   199                              <1> 	;retn
   200                              <1> 	; 26/07/2022
   201 000078C9 E92F4B0000          <1> 	jmp	load_current_FS_directory
   202                              <1> 
   203                              <1> loc_ccdrv_reset_cdir_FAT_12_16_32_fcluster:
   204 000078CE 3C03                <1> 	cmp	al, 3
   205 000078D0 7205                <1> 	jb	short loc_ccdrv_reset_cdir_FAT_12_16_fcluster
   206                              <1> loc_ccdrv_reset_cdir_FAT32_fcluster:
   207 000078D2 8B4632              <1> 	mov	eax, [esi+LD_BPB+FAT32_RootFClust]
   208 000078D5 EB02                <1> 	jmp	short loc_ccdrv_check_rootdir_sign
   209                              <1> loc_ccdrv_reset_cdir_FAT_12_16_fcluster:   
   210                              <1> 	;xor	al, al  ; xor eax, eax
   211                              <1> 	; 26/07/2022
   212 000078D7 31C0                <1> 	xor	eax, eax
   213                              <1> 	;xor	edx, edx
   214                              <1> loc_ccdrv_check_rootdir_sign:
   215 000078D9 80BE8000000000      <1> 	cmp	byte [esi+LD_CurrentDirectory], 0
   216 000078E0 7510                <1> 	jne	short loc_ccdrv_reset_cdir_FAT_fcluster
   217                              <1> loc_ccdrv_set_rootdir_FAT_fcluster:
   218 000078E2 89868C000000        <1>         mov     [esi+LD_CurrentDirectory+12], eax
   219 000078E8 C78680000000524F4F- <1> 	mov	dword [esi+LD_CurrentDirectory], 'ROOT'
   219 000078F1 54                  <1>
   220                              <1> 
   221                              <1> loc_ccdrv_reset_cdir_FAT_fcluster:
   222 000078F2 A3[04780100]        <1> 	mov	[Current_Dir_FCluster], eax
   223                              <1> 
   224 000078F7 BF[687F0100]        <1> 	mov	edi, PATH_Array
   225 000078FC 89F2                <1> 	mov	edx, esi
   226 000078FE 81C680000000        <1> 	add	esi, LD_CurrentDirectory
   227 00007904 B920000000          <1> 	mov	ecx, 32
   228 00007909 F3A5                <1> 	rep	movsd
   229                              <1> 
   230 0000790B E8812B0000          <1> 	call	change_prompt_dir_string
   231                              <1> 	
   232 00007910 89D6                <1> 	mov	esi, edx
   233                              <1> 	
   234 00007912 29C0                <1>         sub	eax, eax
   235                              <1>        ;sub	edx, edx
   236 00007914 BF[0B780100]        <1> 	mov	edi, Current_Dir_Drv
   237                              <1> 
   238 00007919 A2[BF2F0100]        <1> 	mov	[Restore_CDIR], al ; 0
   239 0000791E C3                  <1> 	retn
   240                              <1> 
   241                              <1> dos_prompt:
   242                              <1> 	; 26/07/2022 (TRDOS 386 Kernel v2.0.5)
   243                              <1> 	; 06/05/2016
   244                              <1> 	; 30/01/2016
   245                              <1> 	; 29/01/2016
   246                              <1> 	; 16/01/2016 (TRDOS 386 = TRDOS v2.0)
   247                              <1> 	; 15/09/2011
   248                              <1> 	; 13/09/2009
   249                              <1> 	; 2004-2005
   250                              <1> 
   251                              <1> 	; 06/05/2016
   252 0000791F C705[C4830100]-     <1> 	mov	dword [mainprog_return_addr], return_from_cmd_interpreter
   252 00007925 [D1790000]          <1>
   253                              <1> 
   254                              <1> loc_TRDOS_prompt:
   255 00007929 BF[0A790100]        <1> 	mov	edi, TextBuffer
   256 0000792E C6075B              <1> 	mov	byte [edi], "["
   257 00007931 47                  <1> 	inc	edi
   258 00007932 BE[1A300100]        <1> 	mov	esi, TRDOSPromptLabel
   259                              <1> get_next_prompt_label_char:
   260 00007937 803E20              <1> 	cmp	byte [esi], 20h
   261 0000793A 7203                <1> 	jb	short pass_prompt_label
   262 0000793C A4                  <1> 	movsb
   263 0000793D EBF8                <1> 	jmp	short get_next_prompt_label_char
   264                              <1> pass_prompt_label:
   265 0000793F C6075D              <1> 	mov	byte [edi], "]"
   266 00007942 47                  <1> 	inc	edi
   267 00007943 C60720              <1> 	mov	byte [edi], 20h
   268 00007946 47                  <1> 	inc	edi
   269 00007947 BE[0B780100]        <1> 	mov	esi, Current_Dir_Drv
   270 0000794C 66A5                <1> 	movsw
   271 0000794E A4                  <1> 	movsb 
   272                              <1> loc_prompt_current_directory:
   273 0000794F 803E20              <1> 	cmp	byte [esi], 20h
   274 00007952 7203                <1> 	jb	short pass_prompt_current_directory
   275 00007954 A4                  <1> 	movsb
   276 00007955 EBF8                <1> 	jmp	short loc_prompt_current_directory  
   277                              <1> pass_prompt_current_directory:
   278 00007957 C6073E              <1> 	mov	byte [edi], '>'
   279 0000795A 47                  <1> 	inc	edi
   280 0000795B C60700              <1> 	mov	byte [edi], 0  
   281 0000795E BE[0A790100]        <1> 	mov	esi, TextBuffer
   282 00007963 E842F3FFFF          <1> 	call	print_msg
   283                              <1>         
   284                              <1> 	;sub	bh, bh ; video page = 0
   285                              <1> 	;call	get_cpos ; get cursor position
   286 00007968 668B15[66770100]    <1> 	mov	dx, [CURSOR_POSN] ; video page 0
   287 0000796F 8815[6A780100]      <1> 	mov	[CursorColumn], dl
   288                              <1> 
   289                              <1> 	; 30/01/2016 (to show cursor on the row, again)
   290                              <1> 	; (Initial color attributes of video page 0 is 0)
   291                              <1> 	; (see: 'StartPMP' in trdos386.s)
   292                              <1> 	; 
   293                              <1> 	;mov	edi, 0B8000h ; start of video page 0
   294                              <1> 	;movzx	ecx, dl ; column	 
   295                              <1> 	;mov	al, 80
   296                              <1> 	;mul	dh
   297                              <1> 	;add	ax, cx
   298                              <1> 	;shl	ax, 1 ; character + attribute
   299                              <1> 	;add	di, ax ; (2*80*row) + (2*column)
   300                              <1> 	;neg	cl
   301                              <1> 	;add	cl, 80
   302                              <1> 	;mov	ax, 700h ;  ah = 7 (color attribute)
   303                              <1> 	;rep	stosw	
   304                              <1> 
   305                              <1> loc_rw_char:
   306 00007975 E8AB000000          <1> 	call	rw_char
   307                              <1> loc_move_command:
   308 0000797A BE[BA780100]        <1> 	mov	esi, CommandBuffer
   309 0000797F 89F7                <1> 	mov	edi, esi
   310 00007981 31C9                <1> 	xor	ecx, ecx
   311                              <1> first_command_char:
   312 00007983 AC                  <1> 	lodsb
   313 00007984 3C20                <1> 	cmp	al, 20h
   314 00007986 770C                <1> 	ja	short pass_space_control
   315 00007988 723F                <1> 	jb	short loc_move_cmd_arguments_ok
   316 0000798A 81FE[09790100]      <1> 	cmp	esi, CommandBuffer + 79
   317 00007990 72F1                <1> 	jb	short first_command_char
   318 00007992 EB35                <1> 	jmp	short loc_move_cmd_arguments_ok
   319                              <1> 
   320                              <1> 	; 26/07/2022
   321                              <1> pass_space_control:
   322 00007994 3C61                <1> 	cmp	al, 61h
   323 00007996 7206                <1> 	jb	short pass_capitalize
   324 00007998 3C7A                <1> 	cmp	al, 7Ah
   325 0000799A 7702                <1> 	ja	short pass_capitalize
   326 0000799C 24DF                <1> 	and	al, 0DFh
   327                              <1> pass_capitalize:
   328 0000799E AA                  <1> 	stosb   
   329 0000799F FEC1                <1> 	inc     cl
   330 000079A1 81FE[09790100]      <1> 	cmp     esi, CommandBuffer + 79
   331                              <1> 	;jb	short next_command_char
   332                              <1> 	; 26/07/2022
   333 000079A7 7320                <1> 	jnb	short loc_move_cmd_arguments_ok
   334                              <1> 
   335                              <1> next_command_char:
   336 000079A9 AC                  <1> 	lodsb
   337 000079AA 3C20                <1> 	cmp	al, 20h
   338 000079AC 77E6                <1> 	ja	short pass_space_control
   339 000079AE 7219                <1> 	jb	short loc_move_cmd_arguments_ok
   340                              <1> 
   341                              <1> loc_1st_cmd_arg: ; 30/01/2016
   342 000079B0 AC                  <1> 	lodsb
   343 000079B1 3C20                <1> 	cmp	al, 20h
   344 000079B3 74FB                <1> 	je	short loc_1st_cmd_arg
   345 000079B5 7212                <1> 	jb	short loc_move_cmd_arguments_ok
   346                              <1> 	
   347 000079B7 C60700              <1>         mov     byte [edi], 0
   348 000079BA 47                  <1> 	inc	edi
   349                              <1> 
   350                              <1> loc_move_cmd_arguments:
   351 000079BB AA                  <1> 	stosb
   352 000079BC 81FE[09790100]      <1> 	cmp	esi, CommandBuffer + 79
   353 000079C2 7305                <1> 	jnb	short loc_move_cmd_arguments_ok
   354 000079C4 AC                  <1>         lodsb
   355 000079C5 3C20                <1> 	cmp	al, 20h
   356 000079C7 73F2                <1> 	jnb	short loc_move_cmd_arguments
   357                              <1> 	; 26/07/2022
   358                              <1> 	;jmp	short loc_move_cmd_arguments_ok
   359                              <1> 
   360                              <1> ; 26/07/2022
   361                              <1> ;pass_space_control:
   362                              <1> ;	cmp	al, 61h
   363                              <1> ;	jb	short pass_capitalize
   364                              <1> ;	cmp	al, 7Ah
   365                              <1> ;	ja	short pass_capitalize
   366                              <1> ;	and	al, 0DFh
   367                              <1> ;pass_capitalize:
   368                              <1> ;	stosb   
   369                              <1> ;	inc     cl
   370                              <1> ;	cmp     esi, CommandBuffer + 79
   371                              <1> ;	jb      short next_command_char 
   372                              <1> 
   373                              <1> loc_move_cmd_arguments_ok:
   374 000079C9 C60700              <1>         mov     byte [edi], 0
   375                              <1> 
   376                              <1> call_command_interpreter:
   377 000079CC E8FD070000          <1> 	call    command_interpreter
   378                              <1> 
   379                              <1> return_from_cmd_interpreter:
   380 000079D1 B950000000          <1>         mov	ecx, 80
   381                              <1> 	;mov	cx, 80
   382 000079D6 BF[BA780100]        <1> 	mov	edi, CommandBuffer
   383 000079DB 30C0                <1> 	xor	al, al
   384 000079DD F3AA                <1> 	rep	stosb
   385                              <1> 	;cmp	byte [Program_Exit], 0
   386                              <1> 	;ja	short loc_terminate_trdos
   387                              <1>         
   388                              <1> 	; 16/01/2016
   389 000079DF 803D[1E670000]03    <1> 	cmp	byte [CRT_MODE], 3 ; 80*25 color
   390 000079E6 7419                <1> 	je	short pass_set_txt_mode
   391                              <1> 
   392 000079E8 E830A1FFFF          <1> 	call	set_txt_mode ; set vide mode to 03h
   393                              <1> 	; 07/01/2017
   394 000079ED 30C0                <1> 	xor	al, al
   395                              <1> 
   396                              <1> loc_check_active_page:
   397                              <1> 	;xor	al, al
   398 000079EF 3805[76770100]      <1> 	cmp	[ACTIVE_PAGE], al ; 0
   399                              <1>         ;je	loc_TRDOS_prompt
   400                              <1> 	; 26/07/2022
   401 000079F5 7405                <1> 	je	short loc_prompt_again
   402                              <1> 
   403                              <1> 	; AL = 0 = video page 0
   404 000079F7 E849A5FFFF          <1> 	call	set_active_page
   405                              <1> loc_prompt_again: ; 26/07/2022		
   406 000079FC E928FFFFFF          <1>         jmp     loc_TRDOS_prompt ; infinitive loop
   407                              <1> 
   408                              <1> pass_set_txt_mode: 
   409 00007A01 BE[4B3A0100]        <1> 	mov	esi, nextline
   410 00007A06 E89FF2FFFF          <1> 	call	print_msg
   411 00007A0B EBE2                <1> 	jmp     short loc_check_active_page
   412                              <1> 
   413                              <1> ;rw_char:
   414                              <1> 	; 26/07/2022 (TRDOS 386 Kernel v2.0.5)
   415                              <1> loc_arrow:    
   416 00007A0D 80FC4B              <1> 	cmp	ah, 4Bh
   417 00007A10 7426                <1> 	je	short loc_back
   418 00007A12 80FC53              <1> 	cmp	ah, 53h
   419 00007A15 7421                <1> 	je      short loc_back
   420 00007A17 80FC4D              <1> 	cmp	ah, 4Dh
   421 00007A1A 7509                <1> 	jne	short readnextchar
   422 00007A1C 80FA4F              <1> 	cmp	dl, 79
   423 00007A1F 7304                <1> 	jnb	short readnextchar
   424 00007A21 FEC2                <1> 	inc	dl
   425 00007A23 EB1D                <1> 	jmp	short set_cursor_pos
   426                              <1> 
   427                              <1> rw_char: 
   428                              <1> 	; 26/07/2022 (TRDOS 386 Kernel v2.0.5)
   429                              <1> 	; 13/05/2016
   430                              <1> 	; 30/01/2016
   431                              <1> 	; 29/01/2016
   432                              <1> 	; 17/01/2016 (TRDOS 386 = TRDOS v2.0)
   433                              <1> 	; 2004-2005
   434                              <1> 	
   435                              <1> 	; DH = cursor row, DL = cursor column
   436                              <1> 	; BH = 0 = video page number (active page)
   437                              <1> 
   438                              <1> 	;xor	bh, bh ; 0 = video page 0
   439                              <1> 
   440                              <1> readnextchar:
   441 00007A25 30E4                <1> 	xor     ah, ah
   442 00007A27 E8CC94FFFF          <1> 	call	int16h
   443 00007A2C 20C0                <1> 	and	al, al
   444 00007A2E 74DD                <1> 	jz	short loc_arrow    
   445 00007A30 3CE0                <1> 	cmp	al, 0E0h          
   446 00007A32 74D9                <1> 	je	short loc_arrow
   447 00007A34 3C08                <1> 	cmp	al, 08h             
   448 00007A36 752A                <1> 	jne	short char_return
   449                              <1> loc_back:
   450 00007A38 3A15[6A780100]      <1> 	cmp	dl, [CursorColumn]
   451 00007A3E 76E5                <1> 	jna     short readnextchar
   452                              <1> prev_column:
   453 00007A40 FECA                <1> 	dec	dl
   454                              <1> set_cursor_pos:
   455                              <1> 	;push	dx
   456 00007A42 52                  <1> 	push	edx ; 29/12/2017
   457                              <1> 	;xor	bh, bh ; 0 = video page 0
   458                              <1> 	; DH = Row, DL = Column
   459 00007A43 E8C1A8FFFF          <1> 	call	_set_cpos ; 17/01/2016
   460 00007A48 5A                  <1>         pop	edx ; 29/12/2017
   461                              <1> 	;pop	dx
   462                              <1> 	;movzx	ebx, dl
   463 00007A49 88D3                <1> 	mov	bl, dl
   464 00007A4B 2A1D[6A780100]      <1> 	sub	bl, [CursorColumn] 
   465 00007A51 B020                <1> 	mov	al, 20h
   466 00007A53 8883[BA780100]      <1> 	mov	[CommandBuffer+ebx], al
   467                              <1> 	;sub	bh, bh ; video page 0
   468                              <1> 	;mov	cx, 1
   469 00007A59 B307                <1> 	mov	bl, 7 ; color attribute
   470                              <1> 	; bh = 0 ; 26/07/2022
   471 00007A5B E890A7FFFF          <1> 	call	_write_c_current ; 17/01/2016
   472                              <1> 	;mov	dx, [CURSOR_POSN]
   473 00007A60 EBC3                <1> 	jmp	short readnextchar
   474                              <1> 
   475                              <1> 	; 26/07/2022
   476                              <1> ;loc_arrow:    
   477                              <1> ;	cmp	ah, 4Bh
   478                              <1> ;	je	short loc_back
   479                              <1> ;	cmp	ah, 53h
   480                              <1> ;	je      short loc_back
   481                              <1> ;	cmp	ah, 4Dh
   482                              <1> ;	jne	short readnextchar
   483                              <1> ;	cmp	dl, 79
   484                              <1> ;	jnb	short readnextchar
   485                              <1> ;	inc	dl
   486                              <1> ;	jmp	short set_cursor_pos
   487                              <1> 
   488                              <1> char_return:
   489 00007A62 0FB6DA              <1> 	movzx	ebx, dl
   490 00007A65 2A1D[6A780100]      <1> 	sub	bl, [CursorColumn] 
   491 00007A6B 3C20                <1> 	cmp	al, 20h
   492 00007A6D 721D                <1> 	jb	short loc_escape
   493 00007A6F 8883[BA780100]      <1> 	mov	[CommandBuffer+ebx], al
   494 00007A75 80FA4F              <1> 	cmp	dl, 79
   495 00007A78 73AB                <1> 	jnb	short readnextchar
   496 00007A7A 66BB0700            <1> 	mov	bx, 7 ; color attribute
   497 00007A7E E8EEA7FFFF          <1> 	call	_write_tty
   498 00007A83 668B15[66770100]    <1> 	mov	dx, [CURSOR_POSN] ; video page 0
   499 00007A8A EB99                <1>         jmp	short readnextchar ; 26/07/2022
   500                              <1> 
   501                              <1> loc_escape:
   502 00007A8C 3C1B                <1> 	cmp	al, 1Bh
   503 00007A8E 7414                <1> 	je	short rw_char_retn
   504                              <1> 	;
   505 00007A90 3C0D                <1> 	cmp	al, 0Dh ; CR
   506 00007A92 7591                <1>         jne	short readnextchar ; 26/07/2022
   507                              <1> 
   508                              <1> 	; 13/05/2016
   509 00007A94 66BB0700            <1> 	mov	bx, 7 ; attribute/color (bl)
   510                              <1> 		      ; video page 0 (bh=0)	
   511 00007A98 E8D4A7FFFF          <1> 	call	_write_tty
   512                              <1> 	;mov	bx, 7  ; attribute/color
   513                              <1> 		      ; video page 0 (bh=0)
   514 00007A9D B00A                <1> 	mov	al, 0Ah ; LF
   515 00007A9F E8CDA7FFFF          <1> 	call	_write_tty
   516                              <1> rw_char_retn:
   517 00007AA4 C3                  <1> 	retn
   518                              <1> 
   519                              <1> show_date:
   520                              <1> 	; 26/07/2022 (TRDOS 386 Kernel v2.0.5)
   521                              <1> 	; 18/01/2016 (TRDOS 386 = TRDOS v2.0)
   522                              <1>         ; 2004-2005
   523                              <1> 
   524                              <1> 	;mov	ah, 04h
   525                              <1> 	;call	int1Ah
   526 00007AA5 E80AE8FFFF          <1> 	call	RTC_40	; GET RTC DATE
   527                              <1> 
   528 00007AAA 88D0                <1> 	mov	al, dl
   529 00007AAC E83A94FFFF          <1>   	call	bcd_to_ascii
   530 00007AB1 66A3[06310100]      <1> 	mov	[Day], ax
   531                              <1> 
   532 00007AB7 88F0                <1> 	mov	al, dh
   533 00007AB9 E82D94FFFF          <1>   	call	bcd_to_ascii
   534 00007ABE 66A3[09310100]      <1> 	mov	[Month], ax
   535                              <1> 
   536 00007AC4 88E8                <1> 	mov	al, ch
   537 00007AC6 E82094FFFF          <1>   	call	bcd_to_ascii
   538 00007ACB 66A3[0C310100]      <1> 	mov	[Century], ax
   539                              <1> 
   540 00007AD1 88C8                <1> 	mov	al, cl
   541 00007AD3 E81394FFFF          <1>   	call	bcd_to_ascii
   542 00007AD8 66A3[0E310100]      <1> 	mov	[Year], ax
   543                              <1> 
   544 00007ADE BE[F6300100]        <1> 	mov	esi, Msg_Show_Date
   545                              <1> 	;call	print_msg
   546                              <1> 	;retn
   547                              <1> 	; 26/07/2022
   548 00007AE3 E9C2F1FFFF          <1> 	jmp	print_msg
   549                              <1> 
   550                              <1> set_date:
   551                              <1> 	; 26/07/2022 (TRDOS 386 Kernel v2.0.5)
   552                              <1> 	; 13/05/2016
   553                              <1> 	; 18/01/2016 (TRDOS 386 = TRDOS v2.0)
   554                              <1>         ; 2004-2005
   555                              <1> 
   556 00007AE8 BE[DA300100]        <1> 	mov	esi, Msg_Enter_Date
   557 00007AED E8B8F1FFFF          <1> 	call	print_msg
   558                              <1> 
   559                              <1> loc_enter_day_1:
   560 00007AF2 30E4                <1> 	xor     ah, ah
   561 00007AF4 E8FF93FFFF          <1> 	call	int16h
   562                              <1> 	; AL = ASCII Code of the Character
   563 00007AF9 3C0D                <1> 	cmp	al, 13
   564                              <1> 	;je	loc_set_date_retn
   565                              <1> 	; 26/07/2022
   566 00007AFB 7404                <1> 	je	short set_date_0
   567 00007AFD 3C1B                <1> 	cmp	al, 27
   568                              <1> 	;je	loc_set_date_retn
   569                              <1> 	; 26/07/2022
   570 00007AFF 7511                <1> 	jne	short set_date_1
   571                              <1> 
   572                              <1> set_date_0:
   573                              <1> ;loc_set_date_retn:
   574 00007B01 BE[4B3A0100]        <1> 	mov	esi, nextline
   575                              <1> 	;call	print_msg
   576                              <1> 	;retn
   577                              <1> 	; 26/07/2022
   578 00007B06 E99FF1FFFF          <1> 	jmp	print_msg
   579                              <1> 
   580                              <1> 	; 26/07/2022
   581                              <1> loc_set_date_stc_0:
   582                              <1> 	;xor	bh, bh ; video page 0
   583 00007B0B E84BA8FFFF          <1> 	call	beeper ; BEEP !
   584 00007B10 EBE0                <1> 	jmp	short loc_enter_day_1
   585                              <1> 
   586                              <1> 	; 26/07/2022
   587                              <1> set_date_1:
   588 00007B12 A2[06310100]        <1> 	mov	[Day], al
   589 00007B17 3C30                <1> 	cmp	al, '0'
   590 00007B19 72F0                <1> 	jb	short loc_set_date_stc_0
   591 00007B1B 3C33                <1> 	cmp	al, '3'
   592 00007B1D 77EC                <1> 	ja	short loc_set_date_stc_0
   593                              <1> 	; 13/05/2016
   594                              <1> 	;mov	bx, 7 ; attribute/color (bl)
   595                              <1> 		      ; video page 0 (bh)	
   596 00007B1F B307                <1> 	mov	bl, 7
   597 00007B21 E84BA7FFFF          <1> 	call	_write_tty
   598                              <1> loc_enter_day_2:
   599 00007B26 30E4                <1> 	xor     ah, ah
   600 00007B28 E8CB93FFFF          <1> 	call	int16h
   601                              <1> 	; AL = ASCII Code of the Character
   602 00007B2D 3C1B                <1> 	cmp	al, 27
   603                              <1>         ;je	loc_set_date_retn
   604                              <1> 	; 26/07/2022
   605 00007B2F 74D0                <1> 	je	short set_date_0
   606 00007B31 A2[07310100]        <1> 	mov	[Day+1], al
   607 00007B36 3C30                <1> 	cmp	al, '0'
   608 00007B38 7211                <1>         jb      short loc_set_date_stc_1
   609 00007B3A 3C39                <1> 	cmp	al, '9'
   610 00007B3C 770D                <1>         ja      short loc_set_date_stc_1
   611 00007B3E 803D[06310100]33    <1> 	cmp	byte [Day], '3'
   612 00007B45 7219                <1> 	jb	short pass_set_day_31
   613 00007B47 3C31                <1> 	cmp	al, '1'
   614                              <1>         ;ja	loc_set_date_stc_1
   615                              <1> 	; 26/07/2022
   616 00007B49 7615                <1> 	jna	short pass_set_day_31
   617                              <1> 
   618                              <1> 	; 26/07/2022
   619                              <1> loc_set_date_stc_1:
   620 00007B4B E8E4010000          <1> 	call	check_for_backspace
   621 00007B50 7407                <1> 	je	short loc_set_date_bs_1
   622                              <1> 	;xor	bh, bh ; video page 0
   623 00007B52 E804A8FFFF          <1> 	call	beeper ; BEEP !
   624 00007B57 EBCD                <1> 	jmp	short loc_enter_day_2
   625                              <1> loc_set_date_bs_1:
   626 00007B59 E8C4010000          <1> 	call	write_backspace
   627 00007B5E EB92                <1> 	jmp     short loc_enter_day_1
   628                              <1> 
   629                              <1> pass_set_day_31:
   630                              <1> 	; 13/05/2016
   631                              <1> 	;mov	bx, 7 ; attribute/color (bl)
   632                              <1> 		      ; video page 0 (bh)	
   633 00007B60 B307                <1> 	mov	bl, 7
   634 00007B62 E80AA7FFFF          <1> 	call	_write_tty
   635                              <1> loc_enter_separator_1:
   636 00007B67 28E4                <1> 	sub     ah, ah ; 0
   637 00007B69 E88A93FFFF          <1> 	call	int16h
   638                              <1> 	; AL = ASCII Code of the Character
   639 00007B6E 3C1B                <1> 	cmp	al, 27
   640                              <1>         ;je	loc_set_date_retn
   641                              <1> 	; 26/07/2022
   642 00007B70 748F                <1> 	je	short set_date_0
   643 00007B72 3C2D                <1> 	cmp	al, '-'
   644 00007B74 7443                <1> 	je	short pass_set_date_separator_1
   645 00007B76 3C2F                <1> 	cmp	al, '/'
   646                              <1> 	;jne	loc_set_date_stc_2
   647                              <1> 	; 26/07/2022
   648 00007B78 743F                <1> 	je	short pass_set_date_separator_1
   649                              <1> 
   650                              <1> 	; 26/07/2022
   651                              <1> loc_set_date_stc_2:
   652 00007B7A E8B5010000          <1> 	call	check_for_backspace
   653 00007B7F 7407                <1> 	je	short loc_set_date_bs_2
   654                              <1> 	;xor	bh, bh ; video page 0
   655 00007B81 E8D5A7FFFF          <1> 	call	beeper ; BEEP !
   656 00007B86 EBDF                <1> 	jmp	short loc_enter_separator_1
   657                              <1> loc_set_date_bs_2:
   658 00007B88 E895010000          <1> 	call	write_backspace
   659 00007B8D EB97                <1> 	jmp	short loc_enter_day_2
   660                              <1> 
   661                              <1> 	; 26/07/2022
   662                              <1> loc_set_date_stc_3:
   663 00007B8F E8A0010000          <1> 	call	check_for_backspace
   664 00007B94 7407                <1> 	je	short loc_set_date_bs_3
   665                              <1> 	;xor	bh, bh ; video page 0
   666 00007B96 E8C0A7FFFF          <1> 	call	beeper ; BEEP !
   667 00007B9B EB23                <1> 	jmp	short loc_enter_month_1
   668                              <1> loc_set_date_bs_3:
   669 00007B9D E880010000          <1> 	call	write_backspace
   670 00007BA2 EBC3                <1> 	jmp	short loc_enter_separator_1
   671                              <1> 
   672                              <1> 	; 26/07/2022
   673                              <1> loc_set_date_stc_4:
   674 00007BA4 E88B010000          <1> 	call	check_for_backspace
   675 00007BA9 7407                <1> 	je	short loc_set_date_bs_4
   676                              <1> 	;xor	bh, bh ; video page 0
   677 00007BAB E8ABA7FFFF          <1> 	call	beeper ; BEEP !
   678 00007BB0 EB2D                <1> 	jmp	short loc_enter_month_2
   679                              <1> loc_set_date_bs_4:
   680 00007BB2 E86B010000          <1> 	call	write_backspace
   681 00007BB7 EB07                <1> 	jmp	short loc_enter_month_1
   682                              <1> 	
   683                              <1> pass_set_date_separator_1:
   684                              <1> 	; 13/05/2016
   685                              <1> 	;mov	bx, 7 ; attribute/color (bl)
   686                              <1> 		      ; video page 0 (bh)
   687 00007BB9 B307                <1> 	mov	bl, 7	
   688 00007BBB E8B1A6FFFF          <1> 	call	_write_tty
   689                              <1> loc_enter_month_1:
   690 00007BC0 30E4                <1> 	xor     ah, ah ; 0
   691 00007BC2 E83193FFFF          <1> 	call	int16h
   692                              <1> 	; AL = ASCII Code of the Character
   693 00007BC7 3C1B                <1> 	cmp	al, 27
   694                              <1>         ;je	loc_set_date_retn
   695                              <1> 	; 26/07/2022
   696                              <1> 	;je	short loc_set_date_ok
   697                              <1> 	; 07/08/2022
   698 00007BC9 741F                <1> 	je	short jmp_loc_set_date_ok
   699 00007BCB A2[09310100]        <1> 	mov	[Month], al
   700 00007BD0 3C30                <1> 	cmp	al, '0'
   701 00007BD2 72BB                <1>         jb      short loc_set_date_stc_3
   702 00007BD4 3C31                <1> 	cmp	al, '1'
   703 00007BD6 77B7                <1>         ja	short loc_set_date_stc_3
   704                              <1> 	; 13/05/2016
   705                              <1> 	;mov	bx, 7 ; attribute/color (bl)
   706                              <1> 		      ; video page 0 (bh)	
   707 00007BD8 B307                <1> 	mov	bl, 7
   708 00007BDA E892A6FFFF          <1> 	call	_write_tty
   709                              <1> loc_enter_month_2:
   710 00007BDF 30E4                <1> 	xor     ah, ah
   711 00007BE1 E81293FFFF          <1> 	call	int16h
   712                              <1> 	; AL = ASCII Code of the Character
   713 00007BE6 3C1B                <1> 	cmp	al, 27
   714                              <1>         ;;je	loc_set_date_retn
   715                              <1> 	; 26/07/2022
   716                              <1> 	;je	short loc_set_date_ok
   717                              <1> 	; 07/08/2022
   718 00007BE8 7505                <1> 	jne	short loc_enter_month_3
   719                              <1> jmp_loc_set_date_ok:	
   720 00007BEA E996000000          <1> 	jmp	loc_set_date_ok 
   721                              <1> loc_enter_month_3:
   722 00007BEF A2[0A310100]        <1> 	mov	[Month+1], al
   723 00007BF4 3C30                <1> 	cmp	al, '0'
   724 00007BF6 72AC                <1>         jb	short loc_set_date_stc_4
   725 00007BF8 3C39                <1> 	cmp	al, '9'
   726 00007BFA 77A8                <1>         ja	short loc_set_date_stc_4
   727 00007BFC 803D[09310100]31    <1> 	cmp	byte [Month], '1'
   728 00007C03 7204                <1> 	jb	short pass_set_month_12
   729 00007C05 3C32                <1> 	cmp	al, '2'
   730 00007C07 779B                <1>         ja	short loc_set_date_stc_4
   731                              <1> pass_set_month_12:
   732                              <1> 	; 13/05/2016
   733                              <1> 	;mov	bx, 7 ; attribute/color (bl)
   734                              <1> 		      ; video page 0 (bh)
   735 00007C09 B307                <1> 	mov	bl, 7	
   736 00007C0B E861A6FFFF          <1> 	call	_write_tty
   737                              <1> loc_enter_separator_2:
   738 00007C10 28E4                <1> 	sub     ah, ah
   739 00007C12 E8E192FFFF          <1> 	call	int16h
   740                              <1> 	; AL = ASCII Code of the Character
   741 00007C17 3C1B                <1> 	cmp	al, 27
   742                              <1>         ;je	loc_set_date_retn
   743                              <1> 	; 26/07/2022
   744 00007C19 746A                <1> 	je	short loc_set_date_ok
   745 00007C1B 3C2D                <1> 	cmp	al, '-'
   746 00007C1D 7404                <1> 	je	short pass_set_date_separator_2
   747 00007C1F 3C2F                <1> 	cmp	al, '/'
   748 00007C21 756C                <1>         jne	short loc_set_date_stc_5
   749                              <1> pass_set_date_separator_2:
   750                              <1> 	; 13/05/2016
   751                              <1> 	;mov	bx, 7 ; attribute/color (bl)
   752                              <1> 		      ; video page 0 (bh)	
   753 00007C23 B307                <1> 	mov	bl, 7
   754 00007C25 E847A6FFFF          <1> 	call	_write_tty
   755                              <1> loc_enter_year_1:
   756 00007C2A 30E4                <1> 	xor    ah, ah
   757 00007C2C E8C792FFFF          <1> 	call	int16h
   758                              <1> 	; AL = ASCII Code of the Character
   759 00007C31 3C1B                <1> 	cmp	al, 27
   760                              <1>         ;je	loc_set_date_retn
   761                              <1> 	; 26/07/2022
   762 00007C33 7450                <1> 	je	short loc_set_date_ok
   763 00007C35 A2[0E310100]        <1> 	mov	[Year], al
   764 00007C3A 3C30                <1> 	cmp	al, '0'
   765 00007C3C 726C                <1>         jb	short loc_set_date_stc_6
   766 00007C3E 3C39                <1> 	cmp	al, '9'
   767 00007C40 7768                <1>         ja	short loc_set_date_stc_6
   768                              <1> 	; 13/05/2016
   769                              <1> 	;mov	bx, 7 ; attribute/color (bl)
   770                              <1> 		      ; video page 0 (bh)
   771 00007C42 B307                <1> 	mov	bl, 7	
   772 00007C44 E828A6FFFF          <1> 	call	_write_tty
   773                              <1> loc_enter_year_2:
   774 00007C49 30E4                <1> 	xor	ah, ah
   775 00007C4B E8A892FFFF          <1> 	call	int16h
   776                              <1> 	; AL = ASCII Code of the Character
   777 00007C50 3C1B                <1> 	cmp	al, 27
   778                              <1> 	;je	short loc_set_date_retn
   779                              <1> 	; 26/07/2022
   780 00007C52 7431                <1> 	je	short loc_set_date_ok
   781 00007C54 A2[0F310100]        <1> 	mov	byte [Year+1], al
   782 00007C59 3C30                <1> 	cmp	al, '0'
   783 00007C5B 7268                <1>         jb 	short loc_set_date_stc_7
   784 00007C5D 3C39                <1> 	cmp	al, '9'
   785 00007C5F 7764                <1>         ja	short loc_set_date_stc_7
   786                              <1> 	; 13/05/2016
   787                              <1> 	;mov	bx, 7 ; attribute/color (bl)
   788                              <1> 		      ; video page 0 (bh)
   789 00007C61 B307                <1> 	mov	bl, 7	
   790 00007C63 E809A6FFFF          <1> 	call	_write_tty
   791                              <1> loc_set_date_get_lchar_again:
   792 00007C68 28E4                <1> 	sub	ah, ah ; 0
   793 00007C6A E88992FFFF          <1> 	call	int16h
   794                              <1> 	; AL = ASCII Code of the Character
   795 00007C6F 3C0D                <1> 	cmp	al, 13 ; ENTER key
   796 00007C71 746D                <1> 	je	short loc_set_date_progress
   797 00007C73 3C1B                <1> 	cmp	al, 27 ; ESC key
   798                              <1> 	;je	short loc_set_date_retn
   799                              <1> 	; 26/07/2022
   800 00007C75 740E                <1> 	je	short loc_set_date_ok
   801                              <1> 	;
   802 00007C77 E8B8000000          <1> 	call	check_for_backspace
   803 00007C7C 75EA                <1> 	jne	short loc_set_date_get_lchar_again
   804                              <1> 
   805                              <1> loc_set_date_bs_8:
   806 00007C7E E89F000000          <1> 	call	write_backspace
   807 00007C83 EBC4                <1> 	jmp	short loc_enter_year_2
   808                              <1> 
   809                              <1> loc_set_date_ok:
   810                              <1> ;loc_set_date_retn:
   811 00007C85 BE[4B3A0100]        <1> 	mov	esi, nextline
   812                              <1> 	;call	print_msg
   813                              <1> 	;retn
   814                              <1> 	; 26/07/2022
   815 00007C8A E91BF0FFFF          <1> 	jmp	print_msg
   816                              <1> 
   817                              <1> 	; 26/07/2022
   818                              <1> ;loc_set_date_stc_0:
   819                              <1> ;	;xor	bh, bh ; video page 0
   820                              <1> ;	call	beeper ; BEEP !
   821                              <1> ;	jmp	loc_enter_day_1
   822                              <1> ;loc_set_date_stc_1:
   823                              <1> ;	call	check_for_backspace
   824                              <1> ;	je	short loc_set_date_bs_1
   825                              <1> ;	;xor	bh, bh ; video page 0
   826                              <1> ;	call	beeper ; BEEP !
   827                              <1> ;	jmp	loc_enter_day_2
   828                              <1> ;loc_set_date_bs_1:
   829                              <1> ;	call	write_backspace
   830                              <1> ;	jmp     loc_enter_day_1
   831                              <1> ;loc_set_date_stc_2:
   832                              <1> ;	call	check_for_backspace
   833                              <1> ;	je	short loc_set_date_bs_2
   834                              <1> ;	;xor	bh, bh ; video page 0
   835                              <1> ;	call	beeper ; BEEP !
   836                              <1> ;	jmp	loc_enter_separator_1
   837                              <1> ;loc_set_date_bs_2:
   838                              <1> ;	call	write_backspace
   839                              <1> ;	jmp	loc_enter_day_2
   840                              <1> ;loc_set_date_stc_3:
   841                              <1> ;	call	check_for_backspace
   842                              <1> ;	je	short loc_set_date_bs_3
   843                              <1> ;	;xor	bh, bh ; video page 0
   844                              <1> ;	call	beeper ; BEEP !
   845                              <1> ;	jmp	loc_enter_month_1
   846                              <1> ;loc_set_date_bs_3:
   847                              <1> ;	call	write_backspace
   848                              <1> ;	jmp	loc_enter_separator_1
   849                              <1> ;loc_set_date_stc_4:
   850                              <1> ;	call	check_for_backspace
   851                              <1> ;	je	short loc_set_date_bs_4
   852                              <1> ;	;xor	bh, bh ; video page 0
   853                              <1> ;	call	beeper ; BEEP !
   854                              <1> ;	jmp	loc_enter_month_2
   855                              <1> ;loc_set_date_bs_4:
   856                              <1> ;	call	write_backspace
   857                              <1> ;	jmp	loc_enter_month_1
   858                              <1> 
   859                              <1> 	; 26/07/2022
   860                              <1> loc_set_date_stc_5:
   861 00007C8F E8A0000000          <1> 	call	check_for_backspace
   862 00007C94 740A                <1> 	je	short loc_set_date_bs_5
   863                              <1> 	;xor	bh, bh ; video page 0
   864 00007C96 E8C0A6FFFF          <1> 	call	beeper ; BEEP !
   865 00007C9B E970FFFFFF          <1> 	jmp	loc_enter_separator_2
   866                              <1> loc_set_date_bs_5:
   867 00007CA0 E87D000000          <1> 	call	write_backspace
   868 00007CA5 E935FFFFFF          <1> 	jmp	loc_enter_month_2
   869                              <1> loc_set_date_stc_6:
   870 00007CAA E885000000          <1> 	call	check_for_backspace
   871 00007CAF 740A                <1>         je      short loc_set_date_bs_6
   872                              <1> 	;xor	bh, bh ; video page 0
   873 00007CB1 E8A5A6FFFF          <1> 	call	beeper ; BEEP !
   874 00007CB6 E96FFFFFFF          <1> 	jmp	loc_enter_year_1
   875                              <1> loc_set_date_bs_6:
   876 00007CBB E862000000          <1> 	call	write_backspace
   877 00007CC0 E94BFFFFFF          <1> 	jmp	loc_enter_separator_2
   878                              <1> loc_set_date_stc_7:
   879 00007CC5 E86A000000          <1> 	call	check_for_backspace
   880 00007CCA 740A                <1> 	je	short loc_set_date_bs_7
   881                              <1> 	;xor	bh, bh ; video page 0
   882 00007CCC E88AA6FFFF          <1> 	call	beeper ; BEEP !
   883 00007CD1 E973FFFFFF          <1> 	jmp	loc_enter_year_2
   884                              <1> loc_set_date_bs_7:
   885 00007CD6 E847000000          <1> 	call	write_backspace
   886 00007CDB E94AFFFFFF          <1> 	jmp	loc_enter_year_1
   887                              <1> 
   888                              <1> loc_set_date_progress:
   889                              <1> 	; Get Current Date
   890                              <1> 	;mov	ah, 04h
   891                              <1> 	;call	int1Ah
   892 00007CE0 E8CFE5FFFF          <1> 	call	RTC_40	; GET RTC DATE
   893                              <1> 	; CH = century (in BCD)
   894                              <1> 
   895 00007CE5 66A1[0E310100]      <1> 	mov	ax, [Year]
   896 00007CEB 662D3030            <1> 	sub	ax, '00'
   897 00007CEF C0E004              <1> 	shl	al, 4 ; * 16
   898 00007CF2 88C1                <1> 	mov	cl, al
   899 00007CF4 00E1                <1> 	add	cl, ah
   900 00007CF6 66A1[09310100]      <1> 	mov	ax, [Month]
   901 00007CFC 662D3030            <1> 	sub	ax, '00'
   902 00007D00 C0E004              <1> 	shl	al, 4 ; * 16
   903 00007D03 88C6                <1> 	mov	dh, al
   904 00007D05 00E6                <1> 	add	dh, ah
   905 00007D07 66A1[06310100]      <1> 	mov	ax, [Day]
   906 00007D0D 662D3030            <1> 	sub	ax, '00'
   907 00007D11 C0E004              <1> 	shl	al, 4 ; * 16
   908 00007D14 88C2                <1> 	mov	dl, al
   909 00007D16 00E2                <1> 	add	dl, ah
   910                              <1> 
   911                              <1> 	;mov	ah, 05h
   912                              <1> 	;call	int1Ah
   913 00007D18 E8BDE5FFFF          <1> 	call	RTC_50	; SET RTC DATE
   914                              <1> 
   915                              <1> ;loc_set_date_retn:
   916                              <1> ;	mov	esi, nextline
   917                              <1> ;	;call	print_msg
   918                              <1> ;	;retn
   919                              <1> ;	; 26/07/2022
   920                              <1> ;	jmp	print_msg
   921                              <1> 
   922                              <1> 	; 26/07/2022
   923 00007D1D E963FFFFFF          <1> 	jmp	loc_set_date_ok 
   924                              <1> 
   925                              <1> write_backspace:
   926                              <1> 	; 18/01/2016 (TRDOS 386 = TRDOS v2.0)
   927 00007D22 B008                <1> 	mov	al, 08h ; BACKSPACE
   928                              <1> 	; 13/05/2016
   929 00007D24 66BB0700            <1> 	mov	bx, 7 ; bl = attribute/color
   930                              <1> 		      ; bh = video page = 0	
   931 00007D28 E844A5FFFF          <1> 	call	_write_tty
   932 00007D2D B020                <1> 	mov	al, 20h ; BLANK/SPACE char 
   933                              <1> 	;mov	bx, 7 ; attribute/color
   934                              <1> 	;call	_write_c_current
   935                              <1> 	;retn
   936 00007D2F E9BCA4FFFF          <1> 	jmp	_write_c_current
   937                              <1> 
   938                              <1> check_for_backspace:
   939                              <1> 	; 18/01/2016 (TRDOS 386 = TRDOS v2.0)
   940 00007D34 663D080E            <1> 	cmp	ax, 0E08h
   941 00007D38 7410                <1> 	je	short cfbs_retn
   942 00007D3A 663DE04B            <1> 	cmp	ax, 4BE0h
   943 00007D3E 740A                <1> 	je	short cfbs_retn
   944 00007D40 663D004B            <1> 	cmp	ax, 4B00h
   945 00007D44 7404                <1> 	je	short cfbs_retn
   946 00007D46 663DE053            <1> 	cmp	ax, 53E0h
   947                              <1> cfbs_retn:
   948 00007D4A C3                  <1> 	retn
   949                              <1> 
   950                              <1> show_time:
   951                              <1> 	; 26/07/2022 (TRDOS 386 Kernel v2.0.5)
   952                              <1> 	; 18/01/2016 (TRDOS 386 = TRDOS v2.0)
   953                              <1>         ; 2004-2005
   954                              <1> 
   955                              <1> 	;mov	ah, 02h
   956                              <1> 	;call	int1Ah
   957 00007D4B E8F9E4FFFF          <1> 	call	RTC_20	; GET RTC TIME
   958                              <1> 	
   959 00007D50 88E8                <1> 	mov	al, ch
   960 00007D52 E89491FFFF          <1> 	call	bcd_to_ascii
   961 00007D57 66A3[34310100]      <1> 	mov	[Hour], ax
   962                              <1> 
   963 00007D5D 88C8                <1> 	mov	al, cl
   964 00007D5F E88791FFFF          <1> 	call	bcd_to_ascii
   965 00007D64 66A3[37310100]      <1> 	mov	[Minute], ax
   966                              <1> 
   967 00007D6A 88F0                <1> 	mov	al, dh
   968 00007D6C E87A91FFFF          <1> 	call	bcd_to_ascii
   969 00007D71 66A3[3A310100]      <1> 	mov	[Second], ax
   970                              <1> 
   971 00007D77 BE[24310100]        <1> 	mov	esi, Msg_Show_Time
   972                              <1> 	;call	print_msg
   973                              <1> 	;retn
   974                              <1> 	; 26/07/2022
   975 00007D7C E929EFFFFF          <1> 	jmp	print_msg
   976                              <1> 
   977                              <1> set_time:
   978                              <1> 	; 26/07/2022 (TRDOS 386 Kernel v2.0.5)
   979                              <1> 	; 13/05/2016
   980                              <1> 	; 18/01/2016 (TRDOS 386 = TRDOS v2.0)
   981                              <1>         ; 2004-2005
   982                              <1> 
   983 00007D81 BE[13310100]        <1> 	mov 	esi, Msg_Enter_Time
   984 00007D86 E81FEFFFFF          <1> 	call	print_msg
   985                              <1> 
   986                              <1> loc_enter_hour_1:
   987 00007D8B 30E4                <1> 	xor     ah, ah
   988 00007D8D E86691FFFF          <1> 	call	int16h
   989                              <1> 	; AL = ASCII Code of the Character
   990 00007D92 3C0D                <1> 	cmp	al, 13 ; ENTER key
   991 00007D94 742D                <1>         je	short loc_set_time_retn
   992 00007D96 3C1B                <1> 	cmp	al, 27 ; ESC key
   993 00007D98 7429                <1>         je	short loc_set_time_retn
   994                              <1> set_time_0:
   995 00007D9A A2[34310100]        <1> 	mov	[Hour], al
   996 00007D9F 3C30                <1> 	cmp	al, '0'
   997 00007DA1 7204                <1>         jb	short loc_set_time_stc_0
   998 00007DA3 3C32                <1> 	cmp	al, '2'
   999                              <1>  	;ja	loc_set_time_stc_0
  1000                              <1> 	; 26/07/2022
  1001 00007DA5 7626                <1> 	jna	short set_time_1
  1002                              <1> 
  1003                              <1> 	; 26/07/2022
  1004                              <1> loc_set_time_stc_0:
  1005                              <1> 	;xor	bh, bh ; video page 0
  1006 00007DA7 E8AFA5FFFF          <1> 	call	beeper ; BEEP !
  1007 00007DAC EBDD                <1> 	jmp	short loc_enter_hour_1
  1008                              <1> 
  1009                              <1> loc_set_time_stc_1:
  1010 00007DAE E881FFFFFF          <1> 	call	check_for_backspace
  1011 00007DB3 7407                <1> 	je	short loc_set_time_bs_1
  1012                              <1> 	;xor	bh, bh ; video page 0
  1013 00007DB5 E8A1A5FFFF          <1> 	call	beeper ; BEEP !
  1014 00007DBA EB18                <1> 	jmp	short loc_enter_hour_2
  1015                              <1> loc_set_time_bs_1:
  1016 00007DBC E861FFFFFF          <1> 	call	write_backspace
  1017 00007DC1 EBC8                <1> 	jmp	short loc_enter_hour_1
  1018                              <1> 
  1019                              <1> 	; 26/07/2022
  1020                              <1> loc_set_time_retn:
  1021 00007DC3 BE[4B3A0100]        <1> 	mov 	esi, nextline
  1022                              <1> 	;call	print_msg
  1023                              <1> 	;retn
  1024 00007DC8 E9DDEEFFFF          <1> 	jmp	print_msg
  1025                              <1> 
  1026                              <1> set_time_1:
  1027                              <1> 	; 13/05/2016
  1028                              <1> 	;mov	bx, 7 ; attribute/color (bl)
  1029                              <1> 		      ; video page 0 (bh)
  1030 00007DCD B307                <1> 	mov	bl, 7	
  1031 00007DCF E89DA4FFFF          <1> 	call	_write_tty
  1032                              <1> loc_enter_hour_2:
  1033 00007DD4 30E4                <1> 	xor     ah, ah
  1034 00007DD6 E81D91FFFF          <1> 	call	int16h
  1035                              <1> 	; AL = ASCII Code of the Character
  1036 00007DDB 3C1B                <1> 	cmp	al, 27
  1037 00007DDD 74E4                <1> 	je	short loc_set_time_retn
  1038 00007DDF A2[35310100]        <1> 	mov	[Hour+1], al
  1039 00007DE4 3C30                <1> 	cmp	al, '0'
  1040 00007DE6 72C6                <1> 	jb	short loc_set_time_stc_1
  1041 00007DE8 3C39                <1> 	cmp	al, '9'
  1042 00007DEA 77C2                <1> 	ja	short loc_set_time_stc_1
  1043 00007DEC 803D[34310100]32    <1>         cmp     byte [Hour], '2'
  1044 00007DF3 7204                <1> 	jb	short pass_set_time_24
  1045 00007DF5 3C34                <1> 	cmp	al, '4'
  1046 00007DF7 77B5                <1> 	ja	short loc_set_time_stc_1
  1047                              <1> pass_set_time_24:
  1048                              <1> 	; 13/05/2016
  1049                              <1> 	;mov	bx, 7 ; attribute/color (bl)
  1050                              <1> 		      ; video page 0 (bh)
  1051 00007DF9 B307                <1> 	mov	bl, 7	
  1052 00007DFB E871A4FFFF          <1> 	call	_write_tty
  1053                              <1> loc_enter_time_separator_1:
  1054 00007E00 28E4                <1> 	sub    ah, ah ; 0
  1055 00007E02 E8F190FFFF          <1> 	call	int16h
  1056                              <1> 	; AL = ASCII Code of the Character
  1057 00007E07 3C1B                <1> 	cmp	al, 27
  1058 00007E09 74B8                <1> 	je	short loc_set_time_retn
  1059 00007E0B 3C3A                <1> 	cmp	al, ':'
  1060                              <1> 	;jne	loc_set_time_stc_2
  1061                              <1> 	; 26/07/2022
  1062 00007E0D 7415                <1> 	je	short set_time_2
  1063                              <1> 	
  1064                              <1> 	; 26/07/2022
  1065                              <1> loc_set_time_stc_2:
  1066 00007E0F E820FFFFFF          <1> 	call	check_for_backspace
  1067 00007E14 7407                <1> 	je	short loc_set_time_bs_2
  1068                              <1> 	;xor	bh, bh ; video page 0
  1069 00007E16 E840A5FFFF          <1> 	call	beeper ; BEEP !
  1070 00007E1B EBE3                <1> 	jmp	short loc_enter_time_separator_1
  1071                              <1> loc_set_time_bs_2:
  1072 00007E1D E800FFFFFF          <1> 	call	write_backspace
  1073 00007E22 EBB0                <1> 	jmp	short loc_enter_hour_2
  1074                              <1> 
  1075                              <1> set_time_2:
  1076                              <1> 	; 13/05/2016
  1077                              <1> 	;mov	bx, 7 ; attribute/color (bl)
  1078                              <1> 		      ; video page 0 (bh)
  1079 00007E24 B307                <1> 	mov	bl, 7	
  1080 00007E26 E846A4FFFF          <1> 	call	_write_tty
  1081                              <1> loc_enter_minute_1:
  1082 00007E2B 30E4                <1> 	xor     ah, ah
  1083 00007E2D E8C690FFFF          <1> 	call	int16h
  1084                              <1> 	; AL = ASCII Code of the Character
  1085 00007E32 3C1B                <1> 	cmp	al, 27
  1086 00007E34 748D                <1> 	je	short loc_set_time_retn
  1087 00007E36 A2[37310100]        <1> 	mov	[Minute], al
  1088 00007E3B 3C30                <1> 	cmp	al, '0'
  1089 00007E3D 7204                <1> 	jb	short loc_set_time_stc_3
  1090 00007E3F 3C35                <1> 	cmp	al, '5'
  1091                              <1> 	;ja	loc_set_time_stc_3
  1092                              <1> 	; 26/07/2022
  1093 00007E41 7615                <1> 	jna	short set_time_3
  1094                              <1> 
  1095                              <1> 	; 26/07/2022
  1096                              <1> loc_set_time_stc_3:
  1097 00007E43 E8ECFEFFFF          <1> 	call	check_for_backspace
  1098 00007E48 7407                <1> 	je	short loc_set_time_bs_3
  1099                              <1> 	;xor	bh, bh ; video page 0
  1100 00007E4A E80CA5FFFF          <1> 	call	beeper ; BEEP !6
  1101 00007E4F EBDA                <1> 	jmp	short loc_enter_minute_1
  1102                              <1> loc_set_time_bs_3:
  1103 00007E51 E8CCFEFFFF          <1> 	call	write_backspace
  1104 00007E56 EBA8                <1> 	jmp	short loc_enter_time_separator_1
  1105                              <1> 
  1106                              <1> set_time_3:
  1107                              <1> 	; 13/05/2016
  1108                              <1> 	;mov	bx, 7 ; attribute/color (bl)
  1109                              <1> 		      ; video page 0 (bh)
  1110 00007E58 B307                <1> 	mov	bl, 7	
  1111 00007E5A E812A4FFFF          <1> 	call	_write_tty
  1112                              <1> loc_enter_minute_2:
  1113 00007E5F 30E4                <1> 	xor     ah, ah
  1114 00007E61 E89290FFFF          <1> 	call	int16h
  1115                              <1> 	; AL = ASCII Code of the Character
  1116 00007E66 3C1B                <1> 	cmp	al, 27
  1117                              <1> 	;je	short loc_set_time_retn
  1118                              <1> 	; 07/08/2022
  1119 00007E68 7505                <1> 	jne	short loc_enter_minute_3
  1120 00007E6A E954FFFFFF          <1> 	jmp	loc_set_time_retn
  1121                              <1> loc_enter_minute_3:	
  1122 00007E6F A2[38310100]        <1> 	mov	[Minute+1], al
  1123 00007E74 3C30                <1> 	cmp	al, '0'
  1124 00007E76 7204                <1> 	jb	short loc_set_time_stc_4
  1125 00007E78 3C39                <1> 	cmp	al, '9'
  1126                              <1> 	;ja	loc_set_time_stc_4
  1127                              <1> 	; 26/07/2022
  1128 00007E7A 7615                <1> 	jna	short set_time_4
  1129                              <1> 
  1130                              <1> 	; 26/07/2022
  1131                              <1> loc_set_time_stc_4:
  1132 00007E7C E8B3FEFFFF          <1> 	call	check_for_backspace
  1133 00007E81 7407                <1> 	je	short loc_set_time_bs_4
  1134                              <1> 	;xor	bh, bh ; video page 0
  1135 00007E83 E8D3A4FFFF          <1> 	call	beeper ; BEEP !
  1136 00007E88 EBD5                <1> 	jmp	short loc_enter_minute_2
  1137                              <1> loc_set_time_bs_4:
  1138 00007E8A E893FEFFFF          <1> 	call	write_backspace
  1139 00007E8F EB9A                <1> 	jmp	short loc_enter_minute_1
  1140                              <1> 
  1141                              <1> set_time_4:
  1142                              <1> 	; 13/05/2016
  1143                              <1> 	;mov	bx, 7 ; attribute/color (bl)
  1144                              <1> 		      ; video page 0 (bh)
  1145 00007E91 B307                <1> 	mov	bl, 7	
  1146 00007E93 E8D9A3FFFF          <1> 	call	_write_tty
  1147                              <1> loc_enter_time_separator_2:
  1148 00007E98 66C705[3A310100]30- <1> 	mov	word [Second], 3030h
  1148 00007EA0 30                  <1>
  1149 00007EA1 28E4                <1> 	sub     ah, ah
  1150 00007EA3 E85090FFFF          <1> 	call	int16h
  1151                              <1> 	; AL = ASCII Code of the Character
  1152 00007EA8 3C0D                <1> 	cmp	al, 13
  1153                              <1>         ;je	short loc_set_time_progress
  1154                              <1> 	; 07/08/2022
  1155 00007EAA 7505                <1> 	jne	short loc_enter_time_separator_3
  1156                              <1> jmp_loc_set_time_progress:
  1157 00007EAC E9D4000000          <1> 	jmp	loc_set_time_progress
  1158                              <1> loc_enter_time_separator_3:
  1159 00007EB1 3C1B                <1> 	cmp	al, 27
  1160                              <1> 	;;je	loc_set_time_retn
  1161                              <1> 	; 26/07/2022
  1162                              <1> 	;je	short loc_set_time_ok
  1163                              <1> 	; 07/08/2022
  1164 00007EB3 7505                <1> 	jne	short loc_enter_time_separator_4
  1165 00007EB5 E982000000          <1> 	jmp	loc_set_time_ok
  1166                              <1> loc_enter_time_separator_4:
  1167 00007EBA 3C3A                <1> 	cmp	al, ':'
  1168 00007EBC 7563                <1>         jne	short loc_set_time_stc_5
  1169                              <1> 
  1170                              <1> 	; 13/05/2016
  1171                              <1> 	;mov	bx, 7 ; attribute/color (bl)
  1172                              <1> 		      ; video page 0 (bh)
  1173 00007EBE B307                <1> 	mov	bl, 7	
  1174 00007EC0 E8ACA3FFFF          <1> 	call	_write_tty
  1175                              <1> loc_enter_second_1:
  1176 00007EC5 30E4                <1> 	xor     ah, ah
  1177 00007EC7 E82C90FFFF          <1> 	call	int16h
  1178                              <1> 	; AL = ASCII Code of the Character
  1179 00007ECC 3C0D                <1> 	cmp	al, 13
  1180                              <1> 	;je	short loc_set_time_progress
  1181                              <1> 	; 07/08/2022
  1182 00007ECE 74DC                <1> 	je	short jmp_loc_set_time_progress
  1183 00007ED0 3C1B                <1> 	cmp	al, 27
  1184                              <1> 	;;je	loc_set_time_retn
  1185                              <1> 	; 26/07/2022
  1186                              <1> 	;je	short loc_set_time_ok
  1187                              <1> 	; 07/08/2022
  1188 00007ED2 7502                <1> 	jne	short loc_enter_second_2
  1189 00007ED4 EB66                <1> 	jmp	loc_set_time_ok
  1190                              <1> loc_enter_second_2:
  1191 00007ED6 A2[3A310100]        <1> 	mov	[Second], al
  1192 00007EDB 3C30                <1> 	cmp	al, '0'
  1193 00007EDD 7267                <1> 	jb	short loc_set_time_stc_6
  1194 00007EDF 3C35                <1> 	cmp	al, '5'
  1195 00007EE1 7763                <1> 	ja	short loc_set_time_stc_6
  1196                              <1> 	; 13/05/2016
  1197                              <1> 	;mov	bx, 7 ; attribute/color (bl)
  1198                              <1> 		      ; video page 0 (bh)
  1199 00007EE3 B307                <1> 	mov	bl, 7	
  1200 00007EE5 E887A3FFFF          <1> 	call	_write_tty
  1201                              <1> loc_enter_second_3:
  1202 00007EEA 30E4                <1> 	xor     ah, ah
  1203 00007EEC E80790FFFF          <1> 	call	int16h
  1204                              <1> 	; AL = ASCII Code of the Character
  1205 00007EF1 3C1B                <1> 	cmp	al, 27
  1206                              <1> 	;je	short loc_set_time_retn
  1207                              <1> 	; 26/07/2022
  1208 00007EF3 7447                <1> 	je	short loc_set_time_ok
  1209 00007EF5 3C30                <1> 	cmp	al, '0'
  1210 00007EF7 7271                <1>         jb	short loc_set_time_stc_7
  1211 00007EF9 3C39                <1> 	cmp	al, '9'
  1212 00007EFB 776D                <1>         ja	short loc_set_time_stc_7
  1213                              <1> 	; 13/05/2016
  1214                              <1> 	;mov	bx, 7 ; attribute/color (bl)
  1215                              <1> 		      ; video page 0 (bh)
  1216 00007EFD B307                <1> 	mov	bl, 7	
  1217 00007EFF E86DA3FFFF          <1> 	call	_write_tty
  1218                              <1> loc_set_time_get_lchar_again:
  1219 00007F04 28E4                <1> 	sub	ah, ah ; 0
  1220 00007F06 E8ED8FFFFF          <1> 	call	int16h
  1221                              <1> 	; AL = ASCII Code of the Character
  1222 00007F0B 3C0D                <1> 	cmp	al, 13
  1223 00007F0D 7476                <1> 	je	short loc_set_time_progress
  1224 00007F0F 3C1B                <1> 	cmp	al, 27
  1225                              <1> 	;je	short loc_set_time_retn
  1226                              <1> 	; 07/08/2022
  1227 00007F11 7429                <1> 	je	short loc_set_time_ok
  1228                              <1> 	;
  1229 00007F13 E81CFEFFFF          <1> 	call	check_for_backspace
  1230 00007F18 75EA                <1> 	jne	short loc_set_time_get_lchar_again
  1231                              <1> 
  1232                              <1> loc_set_time_bs_8:
  1233 00007F1A E803FEFFFF          <1> 	call	write_backspace
  1234 00007F1F EBC9                <1> 	jmp	short loc_enter_second_3
  1235                              <1> 
  1236                              <1> ;	; 26/07/2022
  1237                              <1> ;loc_set_time_retn:
  1238                              <1> ;	mov 	esi, nextline
  1239                              <1> ;	;call	print_msg
  1240                              <1> ;	;retn
  1241                              <1> ;	jmp	print_msg
  1242                              <1> 
  1243                              <1> 	; 26/07/2022
  1244                              <1> ;loc_set_time_stc_0:
  1245                              <1> ;	;xor	bh, bh ; video page 0
  1246                              <1> ;	call	beeper ; BEEP !
  1247                              <1> ;	jmp	loc_enter_hour_1
  1248                              <1> ;loc_set_time_stc_1:
  1249                              <1> ;	call	check_for_backspace
  1250                              <1> ;	je	short loc_set_time_bs_1
  1251                              <1> ;	;xor	bh, bh ; video page 0
  1252                              <1> ;	call	beeper ; BEEP !
  1253                              <1> ;	jmp	loc_enter_hour_2
  1254                              <1> ;loc_set_time_bs_1:
  1255                              <1> ;	call	write_backspace
  1256                              <1> ;	jmp	loc_enter_hour_1
  1257                              <1> ;loc_set_time_stc_2:
  1258                              <1> ;	call	check_for_backspace
  1259                              <1> ;	je	short loc_set_time_bs_2
  1260                              <1> ;	;xor	bh, bh ; video page 0
  1261                              <1> ;	call	beeper ; BEEP !
  1262                              <1> ;	jmp	loc_enter_time_separator_1
  1263                              <1> ;loc_set_time_bs_2:
  1264                              <1> ;	call	write_backspace
  1265                              <1> ;	jmp	loc_enter_hour_2
  1266                              <1> ;loc_set_time_stc_3:
  1267                              <1> ;	call	check_for_backspace
  1268                              <1> ;	je	short loc_set_time_bs_3
  1269                              <1> ;	;xor	bh, bh ; video page 0
  1270                              <1> ;	call	beeper ; BEEP !6
  1271                              <1> ;	jmp	loc_enter_minute_1
  1272                              <1> ;loc_set_time_bs_3:
  1273                              <1> ;	call	write_backspace
  1274                              <1> ;	jmp	loc_enter_time_separator_1
  1275                              <1> ;loc_set_time_stc_4:
  1276                              <1> ;	call	check_for_backspace
  1277                              <1> ;	je	short loc_set_time_bs_4
  1278                              <1> ;	;xor	bh, bh ; video page 0
  1279                              <1> ;	call	beeper ; BEEP !
  1280                              <1> ;	jmp	loc_enter_minute_2
  1281                              <1> ;loc_set_time_bs_4:
  1282                              <1> ;	call	write_backspace
  1283                              <1> ;	jmp	loc_enter_minute_1
  1284                              <1> 
  1285                              <1> 	; 26/07/2022
  1286                              <1> loc_set_time_stc_5:
  1287 00007F21 E80EFEFFFF          <1> 	call	check_for_backspace
  1288 00007F26 740A                <1> 	je	short loc_set_time_bs_5
  1289                              <1> 	;xor	bh, bh ; video page 0
  1290 00007F28 E82EA4FFFF          <1> 	call	beeper ; BEEP !
  1291 00007F2D E966FFFFFF          <1> 	jmp	loc_enter_time_separator_2
  1292                              <1> loc_set_time_bs_5:
  1293 00007F32 E8EBFDFFFF          <1> 	call	write_backspace
  1294 00007F37 E923FFFFFF          <1> 	jmp	loc_enter_minute_2
  1295                              <1> 
  1296                              <1> 	; 26/07/2022
  1297                              <1> loc_set_time_ok:
  1298 00007F3C BE[4B3A0100]        <1> 	mov 	esi, nextline
  1299                              <1> 	;call	print_msg
  1300                              <1> 	;retn
  1301 00007F41 E964EDFFFF          <1> 	jmp	print_msg
  1302                              <1> 
  1303                              <1> 	; 07/08/2022
  1304                              <1> loc_set_time_stc_6:
  1305 00007F46 E8E9FDFFFF          <1> 	call	check_for_backspace
  1306 00007F4B 7413                <1> 	je	short loc_set_time_bs_6
  1307                              <1> 	;xor	bh, bh ; video page 0
  1308 00007F4D E809A4FFFF          <1> 	call	beeper ; BEEP !
  1309 00007F52 66C705[3A310100]30- <1> 	mov	word [Second], 3030h
  1309 00007F5A 30                  <1>
  1310 00007F5B E965FFFFFF          <1> 	jmp	loc_enter_second_1
  1311                              <1> loc_set_time_bs_6:
  1312 00007F60 E8BDFDFFFF          <1> 	call	write_backspace
  1313 00007F65 E92EFFFFFF          <1> 	jmp	loc_enter_time_separator_2
  1314                              <1> loc_set_time_stc_7:
  1315 00007F6A E8C5FDFFFF          <1> 	call	check_for_backspace
  1316 00007F6F 740A                <1> 	je	short loc_set_time_bs_7
  1317                              <1> 	;xor	bh, bh ; video page 0
  1318 00007F71 E8E5A3FFFF          <1> 	call	beeper ; BEEP !
  1319 00007F76 E96FFFFFFF          <1> 	jmp	loc_enter_second_3
  1320                              <1> loc_set_time_bs_7:
  1321 00007F7B E8A2FDFFFF          <1> 	call	write_backspace
  1322 00007F80 E940FFFFFF          <1> 	jmp	loc_enter_second_1
  1323                              <1> 
  1324                              <1> loc_set_time_progress:
  1325                              <1> 	; Get Current Time
  1326                              <1> 	;mov 	ah, 02h
  1327                              <1> 	;call	int1Ah
  1328 00007F85 E8BFE2FFFF          <1> 	call	RTC_20	; GET RTC TIME
  1329                              <1> 	;DL = Daylight Savings Enable option (0-1)	
  1330                              <1> 
  1331 00007F8A 66A1[34310100]      <1> 	mov	ax, [Hour]
  1332 00007F90 662D3030            <1> 	sub	ax, '00'
  1333 00007F94 C0E004              <1> 	shl	al, 4 ; * 16
  1334 00007F97 88C5                <1> 	mov	ch, al
  1335 00007F99 00E5                <1> 	add	ch, ah
  1336 00007F9B 66A1[37310100]      <1> 	mov	ax, [Minute]
  1337 00007FA1 662D3030            <1> 	sub	ax, '00'
  1338 00007FA5 C0E004              <1> 	shl	al, 4 ; * 16
  1339 00007FA8 88C1                <1> 	mov	cl, al
  1340 00007FAA 00E1                <1> 	add	cl, ah
  1341 00007FAC 66A1[3A310100]      <1> 	mov	ax, [Second]
  1342 00007FB2 662D3030            <1> 	sub	ax, '00'
  1343 00007FB6 C0E004              <1> 	shl	al, 4 ; * 16
  1344 00007FB9 88C6                <1> 	mov	dh, al
  1345 00007FBB 00E6                <1> 	add	dh, ah
  1346                              <1> 	
  1347                              <1> 	;mov	ah, 03h
  1348                              <1> 	;call	int1Ah
  1349 00007FBD E8B5E2FFFF          <1> 	call	RTC_30	; SET RTC TIME
  1350                              <1> 
  1351                              <1> 	; 26/07/2022
  1352 00007FC2 E975FFFFFF          <1> 	jmp	loc_set_time_ok
  1353                              <1> 
  1354                              <1> print_volume_info:
  1355                              <1> 	; 01/03/2016
  1356                              <1> 	; 08/02/2016
  1357                              <1> 	; 06/02/2016
  1358                              <1> 	; 04/02/2016
  1359                              <1> 	; 18/01/2016 (TRDOS 386 = TRDOS v2.0)
  1360                              <1> 	; 25/10/2009
  1361                              <1> 	;
  1362                              <1> 	; "Volume Serial No: "
  1363                              <1>  	;
  1364                              <1> 	; INPUT  : AL = DOS Drive Number
  1365                              <1> 	; OUTPUT : AH = FS Type
  1366                              <1> 	;          AL = DOS Drive Name
  1367                              <1> 	; CF = 0 -> OK
  1368                              <1> 	; CF = 1 -> Drive not ready 
  1369                              <1> 
  1370 00007FC7 88C4                <1> 	mov	ah, al
  1371 00007FC9 28C0                <1> 	sub	al, al
  1372 00007FCB 0FB7F0              <1> 	movzx	esi, ax	
  1373 00007FCE 81C600010900        <1> 	add	esi, Logical_DOSDisks
  1374 00007FD4 8A06                <1> 	mov	al, [esi]
  1375 00007FD6 3C41                <1> 	cmp	al, 'A'  
  1376 00007FD8 7304                <1> 	jnb	short loc_pvi_set_vol_name
  1377 00007FDA 8A6604              <1> 	mov	ah, [esi+LD_FSType]
  1378 00007FDD C3                  <1> 	retn
  1379                              <1> 
  1380                              <1> loc_pvi_set_vol_name:
  1381 00007FDE A2[6E310100]        <1> 	mov	[Vol_Drv_Name], al
  1382 00007FE3 56                  <1> 	push	esi
  1383 00007FE4 E858010000          <1> 	call	move_volume_name_and_serial_no ;;;
  1384 00007FE9 7302                <1> 	jnc	short loc_pvi_mvn_ok
  1385 00007FEB 5E                  <1> 	pop	esi
  1386 00007FEC C3                  <1> 	retn
  1387                              <1> 
  1388                              <1> loc_pvi_mvn_ok:
  1389 00007FED 8B3424              <1> 	mov	esi, [esp]
  1390 00007FF0 807E04A1            <1> 	cmp	byte [esi+LD_FSType], 0A1h
  1391 00007FF4 7509                <1> 	jne	short loc_pvi_fat_vol_size
  1392 00007FF6 8B4670              <1> 	mov	eax, [esi+LD_FS_VolumeSize]
  1393 00007FF9 0FB75E11            <1> 	movzx	ebx, word [esi+LD_FS_BytesPerSec]
  1394 00007FFD EB07                <1> 	jmp	short loc_vol_size_mul32
  1395                              <1> loc_pvi_fat_vol_size:
  1396 00007FFF 8B4670              <1> 	mov	eax, [esi+LD_TotalSectors]
  1397 00008002 0FB75E11            <1> 	movzx	ebx, word [esi+LD_BPB+BPB_BytsPerSec]
  1398                              <1> loc_vol_size_mul32:
  1399 00008006 F7E3                <1> 	mul	ebx
  1400 00008008 09D2                <1> 	or	edx, edx
  1401 0000800A 7507                <1> 	jnz	short loc_vol_size_in_kbytes
  1402                              <1> loc_vol_size_in_bytes:
  1403 0000800C B9[4C310100]        <1> 	mov	ecx, VolSize_Bytes
  1404 00008011 EB0D                <1> 	jmp	short loc_write_vol_size_str
  1405                              <1> loc_vol_size_in_kbytes:
  1406 00008013 66BB0004            <1> 	mov	bx, 1024
  1407 00008017 F7F3                <1> 	div	ebx
  1408 00008019 B9[3F310100]        <1> 	mov 	ecx, VolSize_KiloBytes
  1409 0000801E 31D2                <1> 	xor	edx, edx ; 0
  1410                              <1> loc_write_vol_size_str:
  1411 00008020 890D[407F0100]      <1> 	mov	[VolSize_Unit1], ecx
  1412                              <1> 	; 
  1413 00008026 BF[567F0100]        <1> 	mov	edi, Vol_Tot_Sec_Str_End
  1414                              <1>         ;mov	byte [edi], 0
  1415 0000802B B90A000000          <1> 	mov	ecx, 10
  1416                              <1> loc_write_vol_size_chr:
  1417 00008030 F7F1                <1> 	div	ecx
  1418 00008032 80C230              <1> 	add	dl, '0'
  1419 00008035 4F                  <1> 	dec	edi	
  1420 00008036 8817                <1> 	mov	[edi], dl
  1421 00008038 85C0                <1> 	test	eax, eax
  1422 0000803A 7404                <1> 	jz	short loc_write_vol_size_str_ok
  1423 0000803C 28D2                <1> 	sub	dl, dl ; 0
  1424 0000803E EBF0                <1> 	jmp	short loc_write_vol_size_chr
  1425                              <1> 
  1426                              <1> loc_write_vol_size_str_ok:
  1427 00008040 893D[487F0100]      <1> 	mov	[Vol_Tot_Sec_Str_Start], edi
  1428                              <1> 	;
  1429 00008046 BF[57310100]        <1> 	mov	edi, Vol_FS_Name
  1430 0000804B 8A4E03              <1> 	mov	cl, [esi+LD_FATType]
  1431 0000804E 20C9                <1> 	and	cl, cl ; 0 ?
  1432 00008050 7515                <1> 	jnz	short loc_write_vol_FAT_str_1
  1433 00008052 66C7075452          <1> 	mov	word [edi], 'TR'
  1434 00008057 C7470420465331      <1> 	mov	dword [edi+4], ' FS1'
  1435                              <1> 	;movzx	ebx, word [esi+LD_FS_BytesPerSec]
  1436 0000805E 668B5E11            <1> 	mov	bx, [esi+LD_FS_BytesPerSec]
  1437 00008062 8B4674              <1> 	mov	eax, [esi+LD_FS_FreeSectors]
  1438 00008065 EB36                <1> 	jmp	short loc_vol_freespace_mul32
  1439                              <1> 
  1440                              <1> loc_write_vol_FAT_str_1:
  1441 00008067 66B83332            <1> 	mov	ax, '32' ; FAT32
  1442 0000806B 80F902              <1> 	cmp	cl, 2 ; [esi+LD_FATType]
  1443 0000806E 7708                <1> 	ja	short loc_write_vol_FAT_str_2
  1444 00008070 66B83132            <1> 	mov	ax, '12' ; FAT12
  1445 00008074 7202                <1> 	jb	short loc_write_vol_FAT_str_2
  1446 00008076 B436                <1> 	mov	ah, '6'  ; FAT16
  1447                              <1> loc_write_vol_FAT_str_2:
  1448 00008078 C70746415420        <1> 	mov	dword [edi], 'FAT '
  1449 0000807E 66894704            <1> 	mov	word [edi+4], ax
  1450                              <1> 	;
  1451                              <1> 	;movzx	ebx, word [esi+LD_BPB+BPB_BytsPerSec]
  1452 00008082 668B5E11            <1> 	mov	bx, [esi+LD_BPB+BPB_BytsPerSec]
  1453 00008086 8B4674              <1> 	mov	eax, [esi+LD_FreeSectors]
  1454                              <1> 
  1455                              <1> loc_vol_freespace_recalc0:
  1456                              <1> 	; 01/03/2016
  1457 00008089 83F8FF              <1> 	cmp	eax, 0FFFFFFFFh
  1458 0000808C 720F                <1> 	jb	short loc_vol_freespace_mul32
  1459                              <1> 	;inc	eax ; 0
  1460 0000808E 20C9                <1> 	and	cl, cl ; byte [esi+LD_FATType]
  1461 00008090 740B                <1> 	jz	short loc_vol_freespace_mul32 	
  1462 00008092 53                  <1> 	push	ebx
  1463 00008093 66BB00FF            <1> 	mov	bx, 0FF00h ; recalculate free sectors
  1464 00008097 E86E470000          <1> 	call	calculate_fat_freespace
  1465 0000809C 5B                  <1> 	pop	ebx
  1466                              <1> 
  1467                              <1> loc_vol_freespace_mul32:
  1468 0000809D F7E3                <1> 	mul	ebx
  1469 0000809F 09D2                <1> 	or	edx, edx
  1470 000080A1 7507                <1> 	jnz	short loc_vol_fspace_in_kbytes
  1471                              <1> loc_vol_fspace_in_bytes:
  1472 000080A3 B9[4C310100]        <1> 	mov	ecx, VolSize_Bytes
  1473 000080A8 EB0D                <1> 	jmp	short loc_write_vol_fspace_str
  1474                              <1> loc_vol_fspace_in_kbytes:
  1475 000080AA 66BB0004            <1> 	mov	bx, 1024
  1476 000080AE F7F3                <1> 	div	ebx
  1477 000080B0 B9[3F310100]        <1> 	mov 	ecx, VolSize_KiloBytes
  1478 000080B5 31D2                <1> 	xor	edx, edx ; 0
  1479                              <1> loc_write_vol_fspace_str:
  1480 000080B7 890D[447F0100]      <1> 	mov	[VolSize_Unit2], ecx
  1481                              <1> 	;	
  1482 000080BD BF[667F0100]        <1> 	mov	edi, Vol_Free_Sectors_Str_End
  1483                              <1>         ;mov	byte [edi], 0
  1484 000080C2 B90A000000          <1> 	mov	ecx, 10
  1485                              <1> loc_write_vol_fspace_chr:
  1486 000080C7 F7F1                <1> 	div	ecx
  1487 000080C9 80C230              <1> 	add	dl, '0'
  1488 000080CC 4F                  <1> 	dec	edi	
  1489 000080CD 8817                <1> 	mov	[edi], dl
  1490 000080CF 85C0                <1> 	test	eax, eax
  1491 000080D1 7404                <1> 	jz	short loc_write_vol_fspace_str_ok
  1492 000080D3 28D2                <1> 	sub	dl, dl ; 0
  1493 000080D5 EBF0                <1> 	jmp	short loc_write_vol_fspace_chr
  1494                              <1> 
  1495                              <1> loc_write_vol_fspace_str_ok:
  1496 000080D7 893D[587F0100]      <1> 	mov	[Vol_Free_Sectors_Str_Start], edi
  1497                              <1> 	;
  1498 000080DD BE[55310100]        <1> 	mov	esi, Volume_in_drive
  1499 000080E2 E8C3EBFFFF          <1> 	call	print_msg
  1500 000080E7 BE[95310100]        <1> 	mov	esi, Vol_Name
  1501 000080EC E8B9EBFFFF          <1> 	call	print_msg
  1502 000080F1 BE[4B3A0100]        <1> 	mov	esi, nextline
  1503 000080F6 E8AFEBFFFF          <1> 	call	print_msg
  1504                              <1> 	;
  1505 000080FB BE[F6310100]        <1> 	mov	esi, Vol_Total_Sector_Header
  1506 00008100 E8A5EBFFFF          <1> 	call	print_msg
  1507 00008105 8B35[487F0100]      <1> 	mov	esi, [Vol_Tot_Sec_Str_Start]
  1508 0000810B E89AEBFFFF          <1> 	call	print_msg
  1509 00008110 8B35[407F0100]      <1> 	mov	esi, [VolSize_Unit1]
  1510 00008116 E88FEBFFFF          <1> 	call	print_msg
  1511                              <1> 	;
  1512 0000811B BE[07320100]        <1> 	mov	esi, Vol_Free_Sectors_Header
  1513 00008120 E885EBFFFF          <1> 	call	print_msg
  1514 00008125 8B35[587F0100]      <1> 	mov	esi, [Vol_Free_Sectors_Str_Start]
  1515 0000812B E87AEBFFFF          <1> 	call	print_msg
  1516 00008130 8B35[447F0100]      <1> 	mov	esi, [VolSize_Unit2]
  1517 00008136 E86FEBFFFF          <1> 	call	print_msg
  1518                              <1> 	;
  1519 0000813B 5E                  <1> 	pop	esi
  1520                              <1> 	
  1521                              <1> 	;mov	ah, [esi+LD_FSType]
  1522                              <1> 	;mov	al, [esi+LD_FATType]
  1523 0000813C 668B4603            <1> 	mov	ax, [esi+LD_FATType]
  1524                              <1> 
  1525 00008140 C3                  <1> 	retn
  1526                              <1> 
  1527                              <1> move_volume_name_and_serial_no:
  1528                              <1> 	; 26/07/2022 (TRDOS 386 Kernel v2.0.5)
  1529                              <1> 	; 08/02/2016  (TRDOS 386 = TRDOS v2.0)
  1530                              <1> 	; this routine will be called by
  1531                              <1> 	; "print_volume_info" and "print_directory"
  1532                              <1> 	; INPUT ->
  1533                              <1> 	;	ESI = Logical DOS drv descripton table address
  1534                              <1> 	; OUTPUT ->
  1535                              <1> 	;	*Volume name will be moved to text area
  1536                              <1> 	;	*Volume serial number will be converted to
  1537                              <1> 	;	 text and will be moved to text area
  1538                              <1> 	;   cf = 1 -> invalid/unknown dos drive
  1539                              <1> 	;   cf = 0 -> ecx = 0
  1540                              <1> 	;
  1541                              <1> 	; (eax, edx, ecx, esi, edi will be changed)
  1542                              <1> 
  1543                              <1> 	; 26/07/2022
  1544 00008141 31C9                <1> 	xor	ecx, ecx
  1545                              <1> 
  1546 00008143 BF[95310100]        <1> 	mov 	edi, Vol_Name
  1547                              <1> 
  1548                              <1> 	;mov	ah, [esi+LD_FSType]
  1549                              <1> 	;mov	al, [esi+LD_FATType]
  1550 00008148 668B4603            <1> 	mov	ax, [esi+LD_FATType]
  1551 0000814C 80FCA1              <1> 	cmp	ah, 0A1h
  1552 0000814F 7418                <1> 	je	short mvn_2
  1553 00008151 08E4                <1> 	or	ah, ah
  1554 00008153 7404                <1> 	jz	short mvn_0
  1555 00008155 08C0                <1> 	or	al, al
  1556 00008157 7504                <1> 	jnz	short mvn_1
  1557                              <1> mvn_0:
  1558 00008159 8A06                <1> 	mov	al, [esi]
  1559 0000815B F9                  <1> 	stc
  1560 0000815C C3                  <1> 	retn
  1561                              <1> mvn_1:
  1562 0000815D 3C02                <1> 	cmp	al, 2
  1563 0000815F 7714                <1> 	ja	short mvn_3 
  1564                              <1> 	;or	al, al
  1565                              <1> 	;jz	short mvn_2
  1566 00008161 8B462D              <1> 	mov	eax, [esi+LD_BPB+VolumeID]
  1567 00008164 83C631              <1> 	add	esi, LD_BPB+VolumeLabel
  1568 00008167 EB12                <1> 	jmp	short mvn_4
  1569                              <1> mvn_2:
  1570 00008169 8B4628              <1> 	mov	eax, [esi+LD_FS_VolumeSerial]
  1571 0000816C 83C62C              <1> 	add	esi, LD_FS_VolumeName
  1572                              <1> 	;mov	ecx, 16
  1573                              <1> 	; 26/07/2022
  1574 0000816F B110                <1> 	mov	cl, 16
  1575 00008171 F3A5                <1> 	rep	movsd
  1576 00008173 EB0D                <1> 	jmp	short mvn_5
  1577                              <1> mvn_3:
  1578 00008175 8B4649              <1> 	mov	eax, [esi+LD_BPB+FAT32_VolID]
  1579 00008178 83C64D              <1> 	add	esi, LD_BPB+FAT32_VolLab
  1580                              <1> mvn_4:
  1581                              <1> 	;mov	ecx, 11
  1582                              <1> 	; 26/07/2022
  1583 0000817B B10B                <1> 	mov	cl, 11
  1584 0000817D F3A4                <1> 	rep	movsb
  1585 0000817F C60700              <1> 	mov	byte [edi], 0
  1586                              <1> mvn_5:
  1587                              <1> 	;mov	[Current_VolSerial], eax  
  1588 00008182 E80AC0FFFF          <1> 	call	dwordtohex
  1589 00008187 8915[EA310100]      <1> 	mov	[Vol_Serial1], edx
  1590 0000818D A3[EF310100]        <1> 	mov	[Vol_Serial2], eax
  1591                              <1> 	; ecx = 0
  1592 00008192 C3                  <1> 	retn
  1593                              <1> 
  1594                              <1> get_volume_serial_number:
  1595                              <1> 	; 19/01/2016 (TRDOS 386 = TRDOS v2.0)
  1596                              <1> 	; 08/08/2010
  1597                              <1> 	;
  1598                              <1> 	; INPUT -> DL = Logical DOS Drive number
  1599                              <1> 	; OUTPUT -> EAX = Volume serial number
  1600                              <1> 	;          BL= FAT Type	    
  1601                              <1> 	;          BH = Logical DOS drv Number (DL input)
  1602                              <1> 	; cf = 1 -> Drive not ready
  1603                              <1> 
  1604 00008193 31DB                <1> 	xor	ebx, ebx
  1605 00008195 88D7                <1> 	mov	bh, dl
  1606 00008197 3815[BE2F0100]      <1> 	cmp	[Last_DOS_DiskNo], dl
  1607 0000819D 7304                <1> 	jnb	short loc_gvsn_start
  1608                              <1> loc_gvsn_stc_retn:
  1609 0000819F 31C0                <1> 	xor	eax, eax
  1610 000081A1 F9                  <1> 	stc 
  1611 000081A2 C3                  <1>         retn 
  1612                              <1> loc_gvsn_start:
  1613 000081A3 56                  <1> 	push	esi
  1614 000081A4 BE00010900          <1> 	mov	esi, Logical_DOSDisks
  1615 000081A9 01DE                <1> 	add	esi, ebx
  1616 000081AB 8A5E03              <1> 	mov	bl, [esi+LD_FATType]
  1617 000081AE 20DB                <1> 	and	bl, bl
  1618 000081B0 740F                <1> 	jz	short loc_gvsn_fs
  1619 000081B2 80FB02              <1> 	cmp	bl, 2
  1620 000081B5 7705                <1> 	ja	short loc_gvsn_fat32
  1621                              <1> loc_gvsn_fat:
  1622 000081B7 83C62D              <1> 	add	esi, LD_BPB + VolumeID
  1623 000081BA EB0E                <1> 	jmp	short loc_gvsn_return
  1624                              <1> loc_gvsn_fat32: 
  1625 000081BC 83C649              <1> 	add	esi, LD_BPB + FAT32_VolID
  1626 000081BF EB09                <1> 	jmp	short loc_gvsn_return 
  1627                              <1> loc_gvsn_fs:
  1628 000081C1 807E04A1            <1> 	cmp	byte [esi+LD_FSType], 0A1h
  1629 000081C5 75D8                <1> 	jne	short loc_gvsn_stc_retn 
  1630 000081C7 83C628              <1> 	add	esi, LD_FS_VolumeSerial
  1631                              <1> loc_gvsn_return:
  1632 000081CA 8B06                <1> 	mov	eax, [esi]
  1633 000081CC 5E                  <1> 	pop	esi
  1634 000081CD C3                  <1> 	retn
  1635                              <1> 
  1636                              <1> ; CMD_INTR.ASM [ TRDOS Command Interpreter Procedure ]
  1637                              <1> ; 09/11/2011
  1638                              <1> ; 29/01/2005
  1639                              <1> 
  1640                              <1> command_interpreter:
  1641                              <1> 	; 26/07/2022 (TRDOS 386 Kernel v2.0.5)
  1642                              <1> 	; 16/10/2016
  1643                              <1> 	; 12/10/2016
  1644                              <1> 	; 13/05/2016
  1645                              <1> 	; 07/05/2016
  1646                              <1> 	; 04/03/2016
  1647                              <1> 	; 04/02/2016
  1648                              <1> 	; 03/02/2016
  1649                              <1> 	; 30/01/2016
  1650                              <1> 	; 29/01/2016 (TRDOS 386 = TRDOS 2.0)
  1651                              <1> 	; 15/09/2011         
  1652                              <1> 	; 29/01/2005
  1653                              <1>         
  1654                              <1> 	; Input: ecx = command word length (CL)
  1655                              <1> 	;	 CommandBuffer = Command string offset
  1656                              <1>  
  1657 000081CE C605[F87F0100]00    <1> 	mov	byte [Program_Exit], 0
  1658                              <1> 
  1659                              <1> 	;cmp	cl, 4
  1660                              <1> 	;ja	c_6
  1661                              <1> 	;jb	c_2
  1662                              <1> 
  1663                              <1> 	; 26/07/2022
  1664 000081D5 80F903              <1> 	cmp	cl, 3
  1665 000081D8 777C                <1> 	ja	short c_4
  1666 000081DA 7405                <1> 	je	short c_3
  1667 000081DC E9D2010000          <1> 	jmp	c_2
  1668                              <1> c_3:
  1669                              <1> cmp_cmd_dir:
  1670 000081E1 BF[26300100]        <1> 	mov	edi, Cmd_Dir
  1671 000081E6 E8D1030000          <1> 	call	cmp_cmd	
  1672                              <1> 	;jnc	print_directory_list
  1673                              <1> 	; 26/07/2022
  1674 000081EB 7205                <1> 	jc	short cmp_cmd_cls
  1675 000081ED E97D040000          <1> 	jmp	print_directory_list
  1676                              <1> 
  1677                              <1> cmp_cmd_cls:
  1678 000081F2 B103                <1> 	mov	cl, 3
  1679 000081F4 BF[62300100]        <1> 	mov	edi, Cmd_Cls
  1680 000081F9 E8BE030000          <1> 	call	cmp_cmd	
  1681                              <1>         ;jnc	clear_screen
  1682                              <1> 	; 26/07/2022
  1683 000081FE 7205                <1> 	jc	short cmp_cmd_ver
  1684 00008200 E9BBEAFFFF          <1> 	jmp	clear_screen
  1685                              <1> 
  1686                              <1> cmp_cmd_ver:
  1687 00008205 B103                <1> 	mov	cl, 3
  1688 00008207 BF[30300100]        <1> 	mov	edi, Cmd_Ver
  1689 0000820C E8AB030000          <1> 	call	cmp_cmd	
  1690 00008211 720A                <1> 	jc	short cmp_cmd_mem
  1691                              <1> 
  1692 00008213 BE[C62F0100]        <1> 	mov	esi, mainprog_Version
  1693                              <1> 	;call	print_msg
  1694 00008218 E98DEAFFFF          <1> 	jmp	print_msg
  1695                              <1> 	;retn
  1696                              <1> 
  1697                              <1> cmp_cmd_mem:
  1698 0000821D B103                <1> 	mov	cl, 3
  1699 0000821F BF[98300100]        <1> 	mov	edi, Cmd_Mem
  1700 00008224 E893030000          <1> 	call	cmp_cmd	
  1701                              <1> 	;jnc	memory_info
  1702                              <1> 	; 26/07/2022
  1703 00008229 7205                <1> 	jc	short cmp_cmd_del
  1704 0000822B E98EBEFFFF          <1> 	jmp	memory_info
  1705                              <1> 
  1706                              <1> cmp_cmd_del:
  1707 00008230 B103                <1> 	mov	cl, 3
  1708 00008232 BF[6B300100]        <1> 	mov	edi, Cmd_Del
  1709 00008237 E880030000          <1> 	call	cmp_cmd	
  1710                              <1>         ;jnc	delete_file
  1711                              <1> 	; 26/07/2022
  1712 0000823C 7205                <1> 	jc	short cmp_cmd_set
  1713 0000823E E9C2100000          <1> 	jmp	delete_file
  1714                              <1> 
  1715                              <1> cmp_cmd_set:
  1716 00008243 B103                <1> 	mov	cl, 3
  1717 00008245 BF[5E300100]        <1> 	mov	edi, Cmd_Set
  1718 0000824A E86D030000          <1> 	call	cmp_cmd	
  1719                              <1> 	;jnc	set_get_env
  1720                              <1> 	; 26/07/2022
  1721 0000824F 720F                <1> 	jc	short cmp_cmd_run
  1722 00008251 E91D190000          <1> 	jmp	set_get_env
  1723                              <1> 
  1724                              <1> 	; 07/08/2022
  1725                              <1> c_4:
  1726                              <1> 	; 26/07/2022
  1727 00008256 80F904              <1> 	cmp	cl, 4
  1728 00008259 741D                <1> 	je	short cmp_cmd_4
  1729 0000825B E937020000          <1> 	jmp	c_6
  1730                              <1> 
  1731                              <1> cmp_cmd_run:
  1732 00008260 B103                <1> 	mov	cl, 3
  1733 00008262 BF[5A300100]        <1> 	mov	edi, Cmd_Run
  1734 00008267 E850030000          <1> 	call	cmp_cmd	
  1735                              <1> 	; 07/05/2016
  1736                              <1>         ;jc	cmp_cmd_external
  1737                              <1> 	; 26/07/2022
  1738 0000826C 7305                <1> 	jnc	short c3_run
  1739 0000826E E92C030000          <1> 	jmp	cmp_cmd_external
  1740                              <1> c3_run:
  1741 00008273 E91C1F0000          <1> 	jmp	load_and_execute_file
  1742                              <1> 
  1743                              <1> cmp_cmd_4:
  1744                              <1> 	; 26/07/2022
  1745                              <1> cmp_cmd_exit:
  1746 00008278 BF[34300100]        <1> 	mov	edi, Cmd_Exit
  1747 0000827D E83A030000          <1> 	call	cmp_cmd	
  1748 00008282 7208                <1> 	jc	short cmp_cmd_date
  1749                              <1> 
  1750 00008284 C605[F87F0100]01    <1>         mov     byte [Program_Exit], 1
  1751 0000828B C3                  <1>         retn
  1752                              <1> 
  1753                              <1> cmp_cmd_date:
  1754 0000828C B104                <1> 	mov	cl, 4
  1755 0000828E BF[50300100]        <1> 	mov	edi, Cmd_Date
  1756 00008293 E824030000          <1> 	call	cmp_cmd	
  1757 00008298 720A                <1>         jc	short cmp_cmd_time
  1758                              <1> 	
  1759 0000829A E806F8FFFF          <1> 	call	show_date
  1760                              <1> 	;call	set_date
  1761                              <1> 	;retn
  1762                              <1> 	; 26/07/2022
  1763 0000829F E944F8FFFF          <1> 	jmp	set_date
  1764                              <1> 
  1765                              <1> cmp_cmd_time:
  1766 000082A4 B104                <1> 	mov	cl, 4
  1767 000082A6 BF[55300100]        <1> 	mov	edi, Cmd_Time
  1768 000082AB E80C030000          <1>    	call	cmp_cmd	
  1769 000082B0 720A                <1> 	jc	short cmp_cmd_show
  1770                              <1> 
  1771 000082B2 E894FAFFFF          <1> 	call	show_time
  1772                              <1> 	;call	set_time
  1773                              <1> 	;retn
  1774                              <1> 	; 26/07/2022
  1775 000082B7 E9C5FAFFFF          <1> 	jmp	set_time
  1776                              <1> 
  1777                              <1> cmp_cmd_show:
  1778 000082BC B104                <1> 	mov	cl, 4
  1779 000082BE BF[66300100]        <1> 	mov	edi, Cmd_Show
  1780 000082C3 E8F4020000          <1>    	call	cmp_cmd	
  1781                              <1>         ;jnc	show_file
  1782                              <1> 	; 26/07/2022
  1783 000082C8 7205                <1> 	jc	short cmp_cmd_echo
  1784 000082CA E946090000          <1> 	jmp	show_file
  1785                              <1> 
  1786                              <1> cmp_cmd_echo:
  1787 000082CF B104                <1> 	mov	cl, 4
  1788 000082D1 BF[A2300100]        <1> 	mov	edi, Cmd_Echo
  1789 000082D6 E8E1020000          <1>    	call	cmp_cmd	
  1790 000082DB 7224                <1> 	jc	short cmp_cmd_copy
  1791                              <1> 	
  1792                              <1> 	; 22/11/2017
  1793                              <1> 	; AL = 0
  1794 000082DD 803E20              <1> 	cmp	byte [esi], 20h
  1795 000082E0 7215                <1> 	jb	short cmd_echo_nextline
  1796                              <1> 	; 14/04/2016
  1797 000082E2 56                  <1> 	push	esi
  1798                              <1> cmd_echo_asciiz:
  1799                              <1> 	;inc	esi
  1800                              <1> 	;mov	al, [esi]
  1801                              <1> 	; 22/11/2017
  1802 000082E3 AC                  <1> 	lodsb
  1803 000082E4 3C20                <1> 	cmp	al, 20h
  1804 000082E6 73FB                <1> 	jnb	short cmd_echo_asciiz
  1805 000082E8 4E                  <1> 	dec	esi
  1806 000082E9 C60600              <1> 	mov	byte [esi], 0
  1807 000082EC 5E                  <1> 	pop	esi
  1808 000082ED 89F7                <1> 	mov	edi, esi
  1809 000082EF E8B6E9FFFF          <1> 	call	print_msg
  1810 000082F4 C60700              <1> 	mov	byte [edi], 0	
  1811                              <1> cmd_echo_nextline:
  1812 000082F7 BE[B93A0100]        <1> 	mov	esi, NextLine
  1813                              <1> 	;call	print_msg   
  1814                              <1> 	;retn
  1815 000082FC E9A9E9FFFF          <1> 	jmp	print_msg
  1816                              <1> 
  1817                              <1> cmp_cmd_copy:
  1818 00008301 B104                <1> 	mov	cl, 4
  1819 00008303 BF[89300100]        <1> 	mov	edi, Cmd_Copy
  1820 00008308 E8AF020000          <1>    	call	cmp_cmd	
  1821                              <1> 	;jnc	copy_file
  1822                              <1> 	; 26/07/2022
  1823 0000830D 7205                <1> 	jc	short cmp_cmd_move
  1824 0000830F E9AA160000          <1> 	jmp	copy_file
  1825                              <1> 
  1826                              <1> cmp_cmd_move:
  1827 00008314 B104                <1> 	mov	cl, 4
  1828 00008316 BF[8E300100]        <1> 	mov	edi, Cmd_Move
  1829 0000831B E89C020000          <1>    	call	cmp_cmd	
  1830                              <1> 	;jnc	move_file
  1831                              <1> 	; 26/07/2022
  1832 00008320 7205                <1> 	jc	short cmp_cmd_path
  1833 00008322 E955150000          <1> 	jmp	move_file
  1834                              <1> 
  1835                              <1> cmp_cmd_path:
  1836 00008327 B104                <1> 	mov	cl, 4
  1837 00008329 BF[93300100]        <1> 	mov	edi, Cmd_Path
  1838 0000832E E889020000          <1>    	call	cmp_cmd	
  1839                              <1> 	;jnc	set_get_path
  1840                              <1> 	; 26/07/2022
  1841 00008333 7205                <1> 	jc	short cmp_cmd_beep
  1842 00008335 E9C1180000          <1> 	jmp	set_get_path
  1843                              <1> 
  1844                              <1> cmp_cmd_beep:
  1845 0000833A B104                <1> 	mov	cl, 4
  1846 0000833C BF[C0300100]        <1> 	mov	edi, Cmd_Beep
  1847 00008341 E876020000          <1>    	call	cmp_cmd	
  1848 00008346 720B                <1> 	jc	short cmp_cmd_find
  1849                              <1> 	; 13/05/2016
  1850 00008348 8A3D[76770100]      <1> 	mov	bh, [ptty] ; [ACTIVE_PAGE]
  1851 0000834E E908A0FFFF          <1> 	jmp	beeper
  1852                              <1> 
  1853                              <1> cmp_cmd_find:
  1854 00008353 B104                <1> 	mov	cl, 4
  1855 00008355 BF[9D300100]        <1> 	mov	edi, Cmd_Find
  1856 0000835A E85D020000          <1>    	call	cmp_cmd	
  1857                              <1>         ;jc	cmp_cmd_external
  1858                              <1> 	; 26/07/2022
  1859 0000835F 7305                <1> 	jnc	short c4_find
  1860 00008361 E939020000          <1> 	jmp	cmp_cmd_external
  1861                              <1> c4_find:
  1862                              <1> 	;call	find_and_list_files
  1863 00008366 E922210000          <1> 	jmp	find_and_list_files
  1864                              <1> 	;retn
  1865                              <1> 
  1866                              <1> c_1:
  1867 0000836B AD                  <1> 	lodsd
  1868                              <1> cmp_cmd_help:
  1869 0000836C 3C3F                <1> 	cmp	al, '?'
  1870 0000836E 751D                <1>         jne     short cmp_cmd_remark
  1871                              <1> 
  1872 00008370 BE[26300100]        <1> 	mov	esi, Command_List
  1873                              <1> cmd_help_next_w:
  1874 00008375 E830E9FFFF          <1> 	call	print_msg
  1875                              <1> 
  1876 0000837A 803E20              <1> 	cmp	byte [esi], 20h ; 0
  1877 0000837D 7233                <1> 	jb	short cmd_help_retn
  1878                              <1> 	
  1879 0000837F 56                  <1> 	push	esi
  1880 00008380 BE[4B3A0100]        <1> 	mov	esi, nextline
  1881 00008385 E820E9FFFF          <1> 	call	print_msg
  1882 0000838A 5E                  <1> 	pop	esi
  1883 0000838B EBE8                <1> 	jmp	short cmd_help_next_w	
  1884                              <1> 
  1885                              <1> cmp_cmd_remark:
  1886 0000838D 3C2A                <1> 	cmp	al, '*'
  1887                              <1> 	;jne	cmp_cmd_external
  1888                              <1> 	; 26/07/2022
  1889 0000838F 7405                <1> 	je	short cmp_cmd_rem
  1890 00008391 E909020000          <1> 	jmp	cmp_cmd_external
  1891                              <1> cmp_cmd_rem:
  1892 00008396 46                  <1> 	inc	esi
  1893 00008397 BF[6C780100]        <1> 	mov	edi, Remark
  1894 0000839C 8A06                <1> 	mov	al, [esi]
  1895 0000839E 3C20                <1> 	cmp	al, 20h
  1896 000083A0 7707                <1> 	ja	short cmd_remark_write
  1897 000083A2 89FE                <1> 	mov	esi, edi ; Remark
  1898 000083A4 E901E9FFFF          <1> 	jmp	print_msg
  1899                              <1> 
  1900                              <1> cmd_remark_write:
  1901 000083A9 AA                  <1> 	stosb
  1902 000083AA AC                  <1> 	lodsb
  1903 000083AB 3C20                <1> 	cmp	al, 20h
  1904 000083AD 73FA                <1> 	jnb	short cmd_remark_write
  1905 000083AF C60700              <1> 	mov	byte [edi], 0
  1906                              <1> 
  1907                              <1> cmd_help_retn:
  1908                              <1> cmd_remark_retn:
  1909                              <1> cd_retn:
  1910 000083B2 C3                  <1> 	retn
  1911                              <1> c_2:
  1912                              <1> 	; 26/07/2022
  1913 000083B3 BE[BA780100]        <1> 	mov	esi, CommandBuffer
  1914 000083B8 80F902              <1> 	cmp	cl, 2
  1915                              <1> 	;ja	c_3
  1916                              <1> 	;mov	esi, CommandBuffer
  1917 000083BB 72AE                <1> 	jb	short c_1
  1918                              <1> 	; 26/07/2022
  1919                              <1> 	;jne	short c_1
  1920                              <1> 
  1921                              <1> cmp_cmd_cd:
  1922 000083BD 66AD                <1> 	lodsw
  1923 000083BF 663D4344            <1> 	cmp	ax, 'CD'
  1924 000083C3 754E                <1> 	jne	short cmp_cmd_drive
  1925 000083C5 46                  <1>         inc	esi
  1926                              <1> cd_0:
  1927 000083C6 668B06              <1> 	mov	ax, [esi]	
  1928 000083C9 3C20                <1> 	cmp	al, 20h
  1929 000083CB 76E5                <1> 	jna	short cd_retn
  1930                              <1> 	; 10/02/2016
  1931 000083CD 80FC3A              <1> 	cmp	ah, ':'
  1932 000083D0 7504                <1> 	jne	short cd_1
  1933 000083D2 46                  <1> 	inc	esi
  1934 000083D3 46                  <1> 	inc	esi
  1935 000083D4 EB47                <1> 	jmp	short cd_2
  1936                              <1> 
  1937                              <1> cd_1:	; change current directory
  1938                              <1> 	; 29/11/2009
  1939                              <1> 	; AH = CDh	; to separate 'CD' command from others
  1940                              <1> 			; for restoring current directory
  1941                              <1> 			; 0CDh sign is for saving cdir into 
  1942                              <1> 			; DOS drv description table cdir area
  1943                              <1> 	
  1944 000083D6 B4CD                <1> 	mov	ah, 0CDh ; mov byte [CD_COMMAND], 0CDh 
  1945                              <1> 
  1946 000083D8 E88B210000          <1> 	call	change_current_directory
  1947                              <1> 	;jnc	change_prompt_dir_string
  1948                              <1> 	; 26/07/2022
  1949 000083DD 7205                <1> 	jc	short cd_error_messages
  1950 000083DF E9AD200000          <1> 	jmp	change_prompt_dir_string
  1951                              <1> 
  1952                              <1> cd_error_messages:
  1953 000083E4 3C03                <1> 	cmp	al, 3
  1954 000083E6 740C                <1> 	je	short cd_path_not_found
  1955                              <1> 	; 16/10/2016 (15h -> 15)
  1956 000083E8 3C0F                <1> 	cmp	al, 15 ; drive not ready error 
  1957 000083EA 7453                <1> 	je	short cd_drive_not_ready
  1958 000083EC 3C11                <1> 	cmp	al, 17 ; read error
  1959 000083EE 744F                <1> 	je	short cd_drive_not_ready	
  1960 000083F0 3C13                <1> 	cmp	al, 19 ; ; Bad directory/path name 
  1961 000083F2 7460                <1> 	je	short cd_command_failed
  1962                              <1> 
  1963                              <1> cd_path_not_found:
  1964 000083F4 50                  <1> 	push	eax ; 29/12/2017
  1965                              <1> 	;push	ax	
  1966 000083F5 BE[C9320100]        <1> 	mov	esi, Msg_Dir_Not_Found
  1967 000083FA E8ABE8FFFF          <1> 	call	print_msg
  1968                              <1> 	;pop	ax
  1969 000083FF 58                  <1> 	pop	eax ; 29/12/2017
  1970 00008400 3A25[08780100]      <1> 	cmp	ah, [Current_Dir_Level]
  1971                              <1>         ;jnb	change_prompt_dir_string
  1972                              <1> 	; 26/07/2022
  1973 00008406 7306                <1> 	jnb	short cd_cpds
  1974 00008408 8825[08780100]      <1> 	mov	[Current_Dir_Level], ah
  1975                              <1> cd_cpds:
  1976 0000840E E97E200000          <1>         jmp     change_prompt_dir_string
  1977                              <1> 
  1978                              <1> cmp_cmd_drive: ; change current drive
  1979                              <1> 	; C:, D:, E: etc.
  1980 00008413 80FC3A              <1> 	cmp	ah, ':'
  1981                              <1> 	;jne	cmp_cmd_external
  1982                              <1> 	; 26/07/2022
  1983 00008416 7405                <1> 	je	short cd_2
  1984                              <1> cmd_ext:
  1985 00008418 E982010000          <1> 	jmp	cmp_cmd_external
  1986                              <1> 
  1987                              <1> cd_2:	; 'CD C:', 'CD D:' ...
  1988 0000841D 803E20              <1> 	cmp	byte [esi], 20h
  1989                              <1> 	;ja	loc_cmd_failed
  1990                              <1> 	; 26/07/2022
  1991 00008420 7706                <1> 	ja	short cd_failed
  1992 00008422 24DF                <1> 	and	al, 0DFh
  1993 00008424 2C41                <1> 	sub	al, 'A'
  1994                              <1> 	;jc	loc_cmd_failed
  1995                              <1> 	; 26/07/2022
  1996 00008426 7305                <1> 	jnc	short cd_3
  1997                              <1> cd_failed:
  1998 00008428 E97C010000          <1> 	jmp	loc_cmd_failed
  1999                              <1> cd_3:
  2000 0000842D 3A05[BE2F0100]      <1>         cmp     al, [Last_DOS_DiskNo]
  2001 00008433 770A                <1>         ja	short cd_drive_not_ready
  2002                              <1> 	
  2003 00008435 88C2                <1> 	mov	dl, al
  2004 00008437 E8A6F3FFFF          <1> 	call 	change_current_drive
  2005 0000843C 7201                <1> 	jc	short cd_drive_not_ready	
  2006 0000843E C3                  <1> 	retn
  2007                              <1> 
  2008                              <1> cd_drive_not_ready:
  2009 0000843F BE[86320100]        <1> 	mov	esi, Msg_Not_Ready_Read_Err
  2010 00008444 E861E8FFFF          <1> 	call	print_msg
  2011                              <1> 
  2012                              <1> cd_fail_drive_restart:
  2013 00008449 8A15[0A780100]      <1> 	mov	dl, [Current_Drv]
  2014                              <1> 	;call 	change_current_drive
  2015 0000844F E98EF3FFFF          <1>         jmp     change_current_drive
  2016                              <1> 	;retn
  2017                              <1> 
  2018                              <1> cd_command_failed:
  2019 00008454 BE[67320100]        <1> 	mov	esi, Msg_Bad_Command
  2020 00008459 E84CE8FFFF          <1> 	call	print_msg
  2021 0000845E EBE9                <1> 	jmp	short cd_fail_drive_restart
  2022                              <1> 
  2023                              <1> c_5:
  2024                              <1> cmp_cmd_mkdir:
  2025 00008460 BF[83300100]        <1> 	mov	edi, Cmd_Mkdir
  2026 00008465 E852010000          <1> 	call	cmp_cmd	
  2027                              <1> 	;jnc	make_directory
  2028                              <1> 	; 26/07/2022
  2029 0000846A 7205                <1> 	jc	short cmp_cmd_rmdir
  2030 0000846C E95C0A0000          <1> 	jmp	make_directory
  2031                              <1> 
  2032                              <1> cmp_cmd_rmdir:
  2033 00008471 B105                <1> 	mov	cl, 5
  2034 00008473 BF[7D300100]        <1> 	mov	edi, Cmd_Rmdir
  2035 00008478 E83F010000          <1> 	call	cmp_cmd	
  2036                              <1> 	;jnc	delete_directory
  2037                              <1> 	; 26/07/2022
  2038 0000847D 7205                <1> 	jc	short cmp_cmd_chdir
  2039 0000847F E9650B0000          <1> 	jmp	delete_directory
  2040                              <1> 
  2041                              <1> cmp_cmd_chdir:
  2042 00008484 B105                <1> 	mov	cl, 5
  2043 00008486 BF[BA300100]        <1> 	mov	edi, Cmd_Chdir
  2044 0000848B E82C010000          <1> 	call	cmp_cmd	
  2045                              <1> 	;jc	cmp_cmd_external
  2046                              <1> 	; 26/07/2022
  2047 00008490 7286                <1> 	jc	short cmd_ext
  2048                              <1> 
  2049 00008492 E92FFFFFFF          <1> 	jmp	cd_0
  2050                              <1> 
  2051                              <1> c_6:
  2052 00008497 80F906              <1> 	cmp	cl, 6
  2053                              <1> 	;ja	c_8
  2054                              <1> 	; 26/07/2022
  2055 0000849A 72C4                <1> 	jb	short c_5
  2056 0000849C 7405                <1> 	je	short cmd_6
  2057 0000849E E9E4000000          <1> 	jmp	c_8
  2058                              <1> 
  2059                              <1> cmd_6:
  2060                              <1> cmp_cmd_prompt:
  2061 000084A3 BF[39300100]        <1> 	mov	edi, Cmd_Prompt
  2062 000084A8 E80F010000          <1> 	call	cmp_cmd	
  2063 000084AD 722F                <1>         jc	short cmp_cmd_volume
  2064                              <1> get_prompt_name_fchar:
  2065 000084AF AC                  <1> 	lodsb
  2066 000084B0 3C20                <1> 	cmp	al, 20h
  2067 000084B2 74FB                <1> 	je	short get_prompt_name_fchar
  2068 000084B4 7713                <1> 	ja	short loc_change_prompt_label
  2069                              <1> default_command_prompt: ; 31/12/2017 ('sysprompt')
  2070 000084B6 BE[1A300100]        <1> 	mov	esi, TRDOSPromptLabel
  2071 000084BB C7065452444F        <1> 	mov	dword [esi], "TRDO"
  2072 000084C1 66C746045300        <1>        	mov	word [esi+4], "S" 
  2073                              <1> loc_cmd_prompt_return:
  2074 000084C7 C3                  <1> 	retn
  2075                              <1> 
  2076                              <1> set_command_prompt: ; 31/12/2017 ('sysprompt')
  2077 000084C8 AC                  <1> 	lodsb
  2078                              <1> loc_change_prompt_label:
  2079                              <1> 	;mov	cx, 11
  2080                              <1> 	; 26/07/2022
  2081 000084C9 29C9                <1> 	sub	ecx, ecx
  2082 000084CB B10B                <1> 	mov	cl, 11
  2083 000084CD BF[1A300100]        <1> 	mov	edi, TRDOSPromptLabel
  2084                              <1> put_char_new_prompt_label:
  2085 000084D2 AA                  <1> 	stosb
  2086 000084D3 AC                  <1> 	lodsb
  2087 000084D4 3C20                <1> 	cmp	al, 20h
  2088 000084D6 7202                <1> 	jb	short pass_put_new_prompt_label
  2089 000084D8 E2F8                <1> 	loop	put_char_new_prompt_label
  2090                              <1> pass_put_new_prompt_label:
  2091 000084DA C60700              <1> 	mov	byte [edi], 0
  2092 000084DD C3                  <1> 	retn
  2093                              <1> 
  2094                              <1> cmp_cmd_volume:
  2095 000084DE B106                <1> 	mov	cl, 6
  2096 000084E0 BF[40300100]        <1> 	mov	edi, Cmd_Volume
  2097 000084E5 E8D2000000          <1> 	call	cmp_cmd	
  2098 000084EA 7259                <1>         jc	short cmp_cmd_attrib
  2099                              <1> 
  2100                              <1> cmd_vol1:
  2101 000084EC AC                  <1> 	lodsb
  2102 000084ED 3C20                <1> 	cmp	al, 20h
  2103 000084EF 7707                <1> 	ja	short cmd_vol2
  2104 000084F1 A0[0A780100]        <1> 	mov	al, [Current_Drv]
  2105 000084F6 EB41                <1> 	jmp	short cmd_vol4
  2106                              <1> cmd_vol2:
  2107 000084F8 3C41                <1> 	cmp	al, 'A'
  2108                              <1> 	;jb	loc_cmd_failed
  2109                              <1> 	; 26/07/2022
  2110 000084FA 722D                <1> 	jb	short cmd_vol_failed_1
  2111 000084FC 3C7A                <1> 	cmp	al, 'z'
  2112                              <1> 	;ja	loc_cmd_failed
  2113                              <1> 	; 26/07/2022
  2114 000084FE 7731                <1> 	ja	short cmd_vol_failed_2
  2115 00008500 3C5A                <1> 	cmp	al, 'Z'
  2116 00008502 7606                <1> 	jna	short cmd_vol3
  2117 00008504 3C61                <1> 	cmp	al, 'a'
  2118                              <1>         ;jb	loc_cmd_failed
  2119                              <1> 	; 26/07/2022
  2120 00008506 722B                <1> 	jb	short cmd_vol_failed_3
  2121 00008508 24DF                <1> 	and	al, 0DFh
  2122                              <1> cmd_vol3:
  2123 0000850A 8A26                <1> 	mov	ah, [esi]
  2124 0000850C 80FC3A              <1> 	cmp	ah, ':'
  2125 0000850F 0F8594000000        <1>         jne     loc_cmd_failed
  2126 00008515 2C41                <1> 	sub	al, 'A'
  2127 00008517 3A05[BE2F0100]      <1>         cmp     al, [Last_DOS_DiskNo]
  2128 0000851D 761A                <1> 	jna	short cmd_vol4
  2129                              <1> 
  2130 0000851F BE[86320100]        <1> 	mov	esi, Msg_Not_Ready_Read_Err
  2131 00008524 E981E7FFFF          <1> 	jmp	print_msg
  2132                              <1> 
  2133                              <1> 	; 26/07/2022
  2134                              <1> 	; (numeric characters and underscore are allowed)
  2135                              <1> cmd_vol_failed_1:
  2136                              <1> 	; check for numeric characters
  2137 00008529 3C30                <1> 	cmp	al, '0'
  2138 0000852B 7204                <1> 	jb	short cmd_vol_failed_2
  2139 0000852D 3C39                <1> 	cmp	al, '9'
  2140 0000852F 76D9                <1> 	jna	short cmd_vol3
  2141                              <1> cmd_vol_failed_2:		
  2142 00008531 EB76                <1> 	jmp	loc_cmd_failed
  2143                              <1> cmd_vol_failed_3:
  2144 00008533 3C5F                <1> 	cmp	al, '_' ; underline ?
  2145 00008535 74D3                <1> 	je	short cmd_vol3 ; is ok..
  2146 00008537 EBF8                <1> 	jmp	short cmd_vol_failed_2
  2147                              <1> 
  2148                              <1> cmd_vol4:
  2149 00008539 E889FAFFFF          <1> 	call	print_volume_info
  2150                              <1> 	;jc	cd_drive_not_ready
  2151                              <1> 	; 26/07/2022
  2152 0000853E 7339                <1> 	jnc	short cmd_vol5
  2153 00008540 E9FAFEFFFF          <1> 	jmp	cd_drive_not_ready	
  2154                              <1> ;cmd_vol5:
  2155                              <1> ;	retn
  2156                              <1> 
  2157                              <1> cmp_cmd_attrib:
  2158 00008545 B106                <1> 	mov	cl, 6
  2159 00008547 BF[6F300100]        <1> 	mov	edi, Cmd_Attrib
  2160 0000854C E86B000000          <1> 	call	cmp_cmd	
  2161                              <1> 	;jnc	set_file_attributes
  2162                              <1> 	; 26/07/2022
  2163 00008551 7205                <1> 	jc	short cmp_cmd_rename
  2164 00008553 E9B80E0000          <1> 	jmp	set_file_attributes
  2165                              <1> 
  2166                              <1> cmp_cmd_rename:
  2167 00008558 B106                <1> 	mov	cl, 6
  2168 0000855A BF[76300100]        <1> 	mov	edi, Cmd_Rename
  2169 0000855F E858000000          <1> 	call	cmp_cmd	
  2170                              <1> 	;jnc	rename_file
  2171                              <1> 	; 26/07/2022
  2172 00008564 7205                <1> 	jc	short cmp_cmd_device
  2173 00008566 E9D6100000          <1> 	jmp	rename_file
  2174                              <1> 
  2175                              <1> cmp_cmd_device:
  2176 0000856B B106                <1> 	mov	cl, 6
  2177 0000856D BF[AB300100]        <1> 	mov	edi, Cmd_Device
  2178 00008572 E845000000          <1> 	call	cmp_cmd	
  2179 00008577 7226                <1> 	jc	short cmp_cmd_external
  2180                              <1> 	; 26/07/2022
  2181                              <1> cmd_vol5:
  2182                              <1> cmd_dev:
  2183 00008579 C3                  <1> 	retn
  2184                              <1> 
  2185                              <1> c_7:
  2186                              <1> cmp_cmd_devlist:
  2187 0000857A BF[B2300100]        <1> 	mov	edi, Cmd_DevList
  2188 0000857F E838000000          <1> 	call	cmp_cmd	
  2189 00008584 7219                <1>         jc	short cmp_cmd_external
  2190                              <1> 
  2191                              <1> loc_cmd_return:
  2192 00008586 C3                  <1> 	retn
  2193                              <1> 
  2194                              <1> c_8:
  2195 00008587 80F908              <1>         cmp	cl, 8
  2196 0000858A 7713                <1> 	ja	short cmp_cmd_external
  2197 0000858C 72EC                <1> 	jb	short c_7
  2198                              <1> 
  2199                              <1> cmp_cmd_longname:
  2200 0000858E BF[47300100]        <1> 	mov	edi, Cmd_LongName
  2201 00008593 E824000000          <1> 	call	cmp_cmd	
  2202                              <1> 	;jnc	get_and_print_longname
  2203                              <1> 	; 26/07/2022
  2204 00008598 7205                <1> 	jc	short cmp_cmd_external
  2205 0000859A E923060000          <1> 	jmp	get_and_print_longname
  2206                              <1> 
  2207                              <1> cmp_cmd_external:
  2208                              <1> 	; 07/05/2016
  2209                              <1> 	; 22/04/2016
  2210 0000859F BE[BA780100]        <1> 	mov	esi, CommandBuffer
  2211 000085A4 E9EB1B0000          <1> 	jmp	loc_run_check_filename 
  2212                              <1> 
  2213                              <1> loc_cmd_failed:
  2214 000085A9 803D[BA780100]20    <1> 	cmp	byte [CommandBuffer], 20h
  2215 000085B0 76D4                <1> 	jna	short loc_cmd_return
  2216 000085B2 BE[67320100]        <1> 	mov	esi, Msg_Bad_Command
  2217                              <1> ;	call	print_msg
  2218                              <1> ;loc_cmd_return:
  2219                              <1> ;	retn
  2220 000085B7 E9EEE6FFFF          <1> 	jmp	print_msg
  2221                              <1> 
  2222                              <1> cmp_cmd:
  2223                              <1> 	; 26/07/2022 (TRDOS 386 Kernel v2.0.5)
  2224                              <1> 	; 29/01/2016 (TRDOS 386 = TRDOS v2.0)
  2225 000085BC BE[BA780100]        <1>         mov	esi, CommandBuffer
  2226                              <1>         ; edi = internal command word (ASCIIZ)
  2227                              <1> 	; ecx = command length (<=8)
  2228                              <1> cmp_cmd_1:
  2229 000085C1 AC                  <1> 	lodsb
  2230 000085C2 AE                  <1> 	scasb
  2231 000085C3 750D                <1> 	jne	short cmp_cmd_3
  2232 000085C5 E2FA                <1> 	loop	cmp_cmd_1
  2233 000085C7 AC                  <1>  	lodsb
  2234 000085C8 3C20                <1> 	cmp	al, 20h
  2235 000085CA 7703                <1> 	ja	short cmp_cmd_2
  2236 000085CC 30C0                <1> 	xor	al, al
  2237                              <1> 	; ZF = 1 -> internal command word matches
  2238 000085CE C3                  <1> 	retn
  2239                              <1> cmp_cmd_2:
  2240                              <1> 	; ZF = 0 (CF = 0) -> external command word 	
  2241 000085CF 58                  <1> 	pop	eax ; no return to the caller from here 
  2242 000085D0 EBCD                <1> 	jmp	short cmp_cmd_external  ; 26/07/2022	
  2243                              <1> cmp_cmd_3:
  2244 000085D2 F9                  <1> 	stc
  2245                              <1> 	; CF = 1 -> internal command word does not match
  2246 000085D3 C3                  <1> 	retn
  2247                              <1> 
  2248                              <1> loc_run_cmd_failed:
  2249                              <1> 	; 26/07/2022 (TRDOS 386 Kernel v2.0.5)
  2250                              <1> 	; 15/03/2016
  2251                              <1> 	; 15/02/2016 (TRDOS 386 = TRDOS v2.0)
  2252                              <1> 	; 07/12/2009 (CMD_INTR.ASM)	
  2253                              <1> 	; 29/11/2009
  2254                              <1> 
  2255 000085D4 E863000000          <1> 	call	restore_cdir_after_cmd_fail
  2256                              <1> 
  2257                              <1> loc_run_cmd_failed_cmp_al:
  2258                              <1> 	; End of Restore_CDIR code (29/11/2009)
  2259                              <1> 
  2260 000085D9 3C01                <1> 	cmp	al, 1 ; Bad command or file name
  2261 000085DB 74CC                <1> 	je	short loc_cmd_failed ; 26/07/2022
  2262                              <1> loc_run_dir_not_found:
  2263 000085DD 3C03                <1> 	cmp	al, 3
  2264 000085DF 750A                <1> 	jne	short loc_run_file_notfound_msg
  2265                              <1> 	; Path not found (MS-DOS Error Code = 3)
  2266 000085E1 BE[C9320100]        <1> 	mov	esi, Msg_Dir_Not_Found
  2267 000085E6 E9BFE6FFFF          <1> 	jmp	print_msg
  2268                              <1> 
  2269                              <1> loc_run_file_notfound_msg:
  2270 000085EB 3C02                <1> 	cmp	al, 2 ; File not found
  2271 000085ED 750A                <1> 	jne	short loc_run_file_drv_read_err
  2272                              <1> 
  2273                              <1> loc_print_file_notfound_msg: 
  2274 000085EF BE[E0320100]        <1>         mov     esi, Msg_File_Not_Found
  2275                              <1> 	;call	proc_printmsg
  2276                              <1> 	;retn
  2277 000085F4 E9B1E6FFFF          <1> 	jmp	print_msg
  2278                              <1> 
  2279                              <1> loc_run_file_drv_read_err:
  2280                              <1> 	; Err: 17 (Read fault)
  2281 000085F9 3C11                <1> 	cmp	al, 17 ; Drive not ready or read error
  2282 000085FB 7404                <1> 	je	short loc_run_file_print_drv_read_err
  2283                              <1> 	;
  2284 000085FD 3C0F                <1> 	cmp	al, 15 ; Drive not ready (or read error)
  2285 000085FF 750A                <1> 	jne	short loc_run_file_toobig
  2286                              <1> 
  2287                              <1> loc_run_file_print_drv_read_err:
  2288 00008601 BE[86320100]        <1> 	mov	esi, Msg_Not_Ready_Read_Err
  2289 00008606 E99FE6FFFF          <1> 	jmp	print_msg
  2290                              <1> 
  2291                              <1> loc_run_file_toobig:
  2292 0000860B 3C08                <1> 	cmp	al, 8 ; Not enough free memory to load&run file
  2293 0000860D 750A                <1> 	jne	short loc_run_file_perm_denied
  2294 0000860F BE[2B330100]        <1> 	mov	esi, Msg_Insufficient_Memory
  2295 00008614 E991E6FFFF          <1> 	jmp	print_msg
  2296                              <1> 
  2297                              <1> loc_run_file_perm_denied:
  2298                              <1> 	; 29/12/2017
  2299 00008619 3C0B                <1> 	cmp	al, ERR_PERM_DENIED ; 11 ; Permission denied
  2300 0000861B 750A                <1> 	jne	short loc_run_misc_error
  2301 0000861D BE[C0340100]        <1> 	mov	esi, Msg_Permission_Denied
  2302 00008622 E983E6FFFF          <1> 	jmp	print_msg	
  2303                              <1> 
  2304                              <1> 	; 15/03/2016
  2305                              <1> print_misc_error_msg:
  2306                              <1> loc_run_misc_error:
  2307                              <1> 	; AL = Error code
  2308 00008627 E825BBFFFF          <1> 	call	bytetohex
  2309 0000862C 66A3[5F330100]      <1>         mov     [error_code_hex], ax
  2310                              <1> 	
  2311 00008632 BE[42330100]        <1> 	mov	esi, Msg_Error_Code 
  2312                              <1> 	;call	print_msg 
  2313                              <1> 	;retn
  2314 00008637 E96EE6FFFF          <1> 	jmp	print_msg
  2315                              <1> 
  2316                              <1> restore_cdir_after_cmd_fail:
  2317                              <1> 	; 15/02/2016 (TRDOS 386 = TRDOS v2.0)
  2318 0000863C 50                  <1> 	push	eax
  2319 0000863D 8A3D[677F0100]      <1> 	mov	bh, [RUN_CDRV] ; it is set at the beginning
  2320                              <1> 				; of the 'run' command.
  2321 00008643 3A3D[0A780100]      <1> 	cmp	bh, [Current_Drv]
  2322 00008649 7409                <1> 	je	short loc_run_restore_cdir
  2323 0000864B 88FA                <1> 	mov	dl, bh
  2324 0000864D E890F1FFFF          <1> 	call	change_current_drive 
  2325 00008652 EB19                <1> 	jmp	short loc_run_err_pass_restore_cdir
  2326                              <1> 
  2327                              <1> loc_run_restore_cdir:
  2328 00008654 803D[BF2F0100]00    <1> 	cmp	byte [Restore_CDIR], 0
  2329 0000865B 7610                <1> 	jna	short loc_run_err_pass_restore_cdir
  2330 0000865D 30DB                <1> 	xor	bl, bl
  2331 0000865F 0FB7F3              <1> 	movzx	esi, bx
  2332 00008662 81C600010900        <1> 	add	esi, Logical_DOSDisks
  2333 00008668 E82BF2FFFF          <1> 	call	restore_current_directory
  2334                              <1> 
  2335                              <1> loc_run_err_pass_restore_cdir:
  2336 0000866D 58                  <1> 	pop	eax
  2337 0000866E C3                  <1> 	retn
  2338                              <1> 
  2339                              <1> print_directory_list:
  2340                              <1> 	; 07/08/2022
  2341                              <1> 	; 27/07/2022 (TRDOS 386 Kernel v2.0.5)
  2342                              <1> 	; 10/02/2016
  2343                              <1> 	; 08/02/2016 (TRDOS 386 = TRDOS v2.0)
  2344                              <1> 	; 06/12/2009 ('cmp_cmd_dir')	
  2345                              <1> 	;
  2346 0000866F 66C705[A8800100]00- <1> 	mov	word [AttributesMask], 0800h ; ..except volume names..
  2346 00008677 08                  <1>
  2347 00008678 A0[0A780100]        <1> 	mov	al, [Current_Drv]
  2348 0000867D A2[677F0100]        <1> 	mov	[RUN_CDRV], al
  2349                              <1> get_dfname_fchar:
  2350 00008682 AC                  <1> 	lodsb
  2351 00008683 3C20                <1> 	cmp	al, 20h
  2352 00008685 74FB                <1> 	je	short get_dfname_fchar
  2353 00008687 0F82E0000000        <1>         jb      loc_print_dir_call_all
  2354 0000868D 3C2D                <1> 	cmp	al, '-'
  2355 0000868F 753C                <1> 	jne	short loc_print_dir_call_flt
  2356                              <1> get_next_attr_char:
  2357 00008691 AC                  <1> 	lodsb
  2358 00008692 3C20                <1> 	cmp	al, 20h
  2359 00008694 74FB                <1> 	je	short get_next_attr_char
  2360                              <1> 	;jb	loc_cmd_failed
  2361                              <1> 	; 27/07/2022
  2362 00008696 7305                <1> 	jnb	short pdl_1
  2363                              <1> pdl_0:
  2364 00008698 E90CFFFFFF          <1> 	jmp	loc_cmd_failed
  2365                              <1> pdl_1:
  2366 0000869D 24DF                <1> 	and	al, 0DFh
  2367 0000869F 3C44                <1> 	cmp	al, 'D' ; directories only ?
  2368 000086A1 750E                <1> 	jne	short pass_only_directories
  2369 000086A3 AC                  <1> 	lodsb
  2370 000086A4 3C20                <1> 	cmp	al, 20h
  2371                              <1> 	;ja	loc_cmd_failed
  2372                              <1> 	; 27/07/2022
  2373 000086A6 77F0                <1> 	ja	short pdl_0
  2374 000086A8 800D[A8800100]10    <1> 	or	byte [AttributesMask], 10h ; ..directory..
  2375 000086AF EB10                <1> 	jmp	short get_dfname_fchar_attr
  2376                              <1> pass_only_directories:
  2377 000086B1 3C46                <1> 	cmp	al, 'F'	; files only ?
  2378 000086B3 7530                <1> 	jne	short check_attr_s ; 27/07/2022
  2379 000086B5 AC                  <1> 	lodsb
  2380 000086B6 3C20                <1> 	cmp	al, 20h
  2381                              <1> 	;ja	loc_cmd_failed
  2382                              <1> 	; 27/07/2022
  2383 000086B8 77DE                <1> 	ja	short pdl_0
  2384 000086BA 800D[A9800100]10    <1> 	or	byte [AttributesMask+1], 10h ; ..except directories..
  2385                              <1> get_dfname_fchar_attr:
  2386 000086C1 AC                  <1> 	lodsb
  2387 000086C2 3C20                <1> 	cmp	al, 20h
  2388 000086C4 74FB                <1> 	je	short get_dfname_fchar_attr
  2389                              <1> 	;jb	short loc_print_dir_call_all
  2390                              <1> 	; 07/08/2022
  2391 000086C6 7305                <1> 	jnb	short loc_print_dir_call_flt
  2392 000086C8 E9A0000000          <1> 	jmp	loc_print_dir_call_all
  2393                              <1> loc_print_dir_call_flt:
  2394 000086CD 4E                  <1> 	dec	esi
  2395 000086CE BF[AA800100]        <1> 	mov	edi, FindFile_Drv
  2396 000086D3 E87C240000          <1> 	call	parse_path_name
  2397 000086D8 7352                <1>  	jnc	short loc_print_dir_change_drv_1
  2398 000086DA 3C01                <1> 	cmp	al, 1
  2399                              <1> 	;ja	loc_run_cmd_failed
  2400                              <1> 	; 27/07/2022
  2401 000086DC 764E                <1> 	jna	short loc_print_dir_change_drv_1
  2402                              <1> pdl_2:
  2403 000086DE E9F1FEFFFF          <1> 	jmp	loc_run_cmd_failed
  2404                              <1> 
  2405                              <1> 	; 27/07/2022
  2406                              <1> check_attr_s_cap:
  2407 000086E3 24DF                <1> 	and	al, 0DFh
  2408                              <1> check_attr_s:
  2409 000086E5 3C53                <1> 	cmp	al, 'S'
  2410 000086E7 7510                <1> 	jne	short pass_attr_s
  2411 000086E9 800D[A8800100]04    <1> 	or	byte [AttributesMask], 4 ; system
  2412 000086F0 AC                  <1> 	lodsb
  2413 000086F1 3C20                <1> 	cmp	al, 20h
  2414 000086F3 74CC                <1> 	je	short get_dfname_fchar_attr
  2415 000086F5 7276                <1> 	jb	short loc_print_dir_call_all
  2416 000086F7 24DF                <1> 	and	al, 0DFh
  2417                              <1> pass_attr_s:
  2418 000086F9 3C48                <1> 	cmp	al, 'H'
  2419 000086FB 7510                <1> 	jne	short pass_attr_h
  2420 000086FD 800D[A8800100]02    <1> 	or	byte [AttributesMask], 2 ; hidden
  2421                              <1> pass_attr_shr:
  2422 00008704 AC                  <1> 	lodsb
  2423 00008705 3C20                <1> 	cmp	al, 20h
  2424 00008707 74B8                <1> 	je	short get_dfname_fchar_attr
  2425 00008709 7262                <1> 	jb	short loc_print_dir_call_all
  2426 0000870B EBD6                <1> 	jmp	short check_attr_s_cap
  2427                              <1> pass_attr_h:
  2428 0000870D 3C52                <1> 	cmp	al, 'R'
  2429 0000870F 7509                <1> 	jne	short pass_attr_r
  2430 00008711 800D[A8800100]01    <1> 	or	byte [AttributesMask], 1 ; read only
  2431 00008718 EBEA                <1> 	jmp	short pass_attr_shr
  2432                              <1> pass_attr_r:
  2433 0000871A 3C41                <1> 	cmp	al, 'A'
  2434                              <1> 	;jne	loc_cmd_failed
  2435                              <1> 	; 27/07/2022
  2436 0000871C 7405                <1> 	je	short pass_attr_a
  2437 0000871E E986FEFFFF          <1> 	jmp	loc_cmd_failed
  2438                              <1> pass_attr_a:
  2439 00008723 800D[A8800100]20    <1> 	or	byte [AttributesMask], 20h ; archive
  2440 0000872A EBD8                <1> 	jmp	short pass_attr_shr
  2441                              <1> 
  2442                              <1> 	; 07/08/2022
  2443                              <1> loc_print_dir_change_drv_1:
  2444 0000872C 8A15[AA800100]      <1> 	mov	dl, [FindFile_Drv]
  2445                              <1> loc_print_dir_change_drv_2:
  2446 00008732 3A15[677F0100]      <1> 	cmp	dl, [RUN_CDRV]
  2447 00008738 7407                <1> 	je	short loc_print_dir_change_directory 
  2448 0000873A E8A3F0FFFF          <1> 	call	change_current_drive
  2449                              <1>         ;jc	loc_run_cmd_failed
  2450                              <1> 	; 27/07/2022
  2451 0000873F 729D                <1> 	jc	short pdl_2
  2452                              <1> loc_print_dir_change_directory:
  2453 00008741 803D[AB800100]20    <1> 	cmp	byte [FindFile_Directory], 20h ; 0 or 20h ?
  2454 00008748 7619                <1> 	jna	short pass_print_dir_change_directory
  2455                              <1> 
  2456 0000874A FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  2457 00008750 BE[AB800100]        <1> 	mov	esi, FindFile_Directory
  2458 00008755 30E4                <1> 	xor	ah, ah ; CD_COMMAND sign -> 0 
  2459 00008757 E80C1E0000          <1> 	call	change_current_directory
  2460                              <1>         ;jc	loc_run_cmd_failed
  2461                              <1> 	; 27/07/2022
  2462 0000875C 7280                <1> 	jc	short pdl_2
  2463                              <1> 
  2464                              <1> loc_print_dir_change_prompt_dir_string:
  2465 0000875E E82E1D0000          <1> 	call	change_prompt_dir_string
  2466                              <1> 
  2467                              <1> pass_print_dir_change_directory:
  2468 00008763 BE[EC800100]        <1> 	mov	esi, FindFile_Name
  2469 00008768 803E20              <1> 	cmp	byte [esi], 20h ; ; 0 or 20h ?
  2470 0000876B 7706                <1> 	ja	short loc_print_dir_call
  2471                              <1> 
  2472                              <1> loc_print_dir_call_all:
  2473 0000876D C7062A2E2A00        <1> 	mov	dword [esi], '*.*'
  2474                              <1> loc_print_dir_call:
  2475 00008773 E82D000000          <1> 	call	print_directory
  2476                              <1> 
  2477 00008778 8A15[677F0100]      <1> 	mov	dl, [RUN_CDRV]  ; it is set at the beginning
  2478 0000877E 3A15[0A780100]      <1> 	cmp	dl, [Current_Drv]
  2479 00008784 7405                <1> 	je	short loc_print_dir_call_restore_cdir_retn
  2480                              <1> 	;call	change_current_drive
  2481                              <1> 	;retn
  2482                              <1> 	; 27/07/2022
  2483 00008786 E957F0FFFF          <1> 	jmp	change_current_drive	
  2484                              <1> 
  2485                              <1> loc_print_dir_call_restore_cdir_retn:
  2486 0000878B 803D[BF2F0100]00    <1> 	cmp	byte [Restore_CDIR], 0
  2487 00008792 7610                <1> 	jna	short pass_print_dir_call_restore_cdir_retn
  2488                              <1> 
  2489 00008794 BE00010900          <1> 	mov	esi, Logical_DOSDisks
  2490 00008799 31C0                <1> 	xor	eax, eax
  2491 0000879B 88D4                <1> 	mov	ah, dl
  2492 0000879D 01C6                <1> 	add	esi, eax
  2493                              <1> 
  2494                              <1> 	;call	restore_current_directory
  2495                              <1> 	; 27/07/2022
  2496 0000879F E9F4F0FFFF          <1> 	jmp	restore_current_directory
  2497                              <1> 
  2498                              <1> pass_print_dir_call_restore_cdir_retn:
  2499 000087A4 C3                  <1> 	retn
  2500                              <1> 
  2501                              <1> print_directory:
  2502                              <1> 	; 27/07/2022 (TRDOS 386 Kernel v2.0.5)
  2503                              <1> 	; 13/05/2016
  2504                              <1> 	; 11/02/2016
  2505                              <1> 	; 10/02/2016
  2506                              <1> 	; 08/02/2016 (TRDOS 386 = TRDOS v2.0)
  2507                              <1> 	; 30/10/2010 ('proc_print_directory')	
  2508                              <1> 	; 19/09/2009
  2509                              <1> 	; 2005 
  2510                              <1> 	; INPUT ->
  2511                              <1> 	;	ESI = Asciiz File/Dir Name Address
  2512                              <1> 
  2513 000087A5 56                  <1> 	push	esi
  2514                              <1> 
  2515 000087A6 29C0                <1> 	sub	eax, eax
  2516                              <1> 
  2517 000087A8 66A3[34810100]      <1> 	mov	[Dir_Count], ax ; 0
  2518 000087AE 66A3[32810100]      <1> 	mov 	[File_Count], ax ; 0
  2519 000087B4 A3[36810100]        <1> 	mov 	[Total_FSize], eax ; 0
  2520                              <1> 
  2521 000087B9 E802E5FFFF          <1> 	call    clear_screen
  2522                              <1> 	
  2523 000087BE 31C9                <1> 	xor	ecx, ecx	
  2524 000087C0 8A2D[0A780100]      <1> 	mov     ch, [Current_Drv] ; DirBuff_Drv - 'A'
  2525 000087C6 A0[0B780100]        <1> 	mov     al, [Current_Dir_Drv] 
  2526 000087CB A2[84310100]        <1> 	mov     [Dir_Drive_Name], al
  2527 000087D0 BE00010900          <1> 	mov	esi, Logical_DOSDisks
  2528 000087D5 01CE                <1> 	add	esi, ecx
  2529                              <1> 
  2530 000087D7 E865F9FFFF          <1> 	call	move_volume_name_and_serial_no
  2531 000087DC 730C                <1> 	jnc	short print_dir_strlen_check
  2532                              <1> 
  2533 000087DE 5E                  <1> 	pop	esi
  2534 000087DF 8A3D[76770100]      <1> 	mov	bh, [ptty] ; [ACTIVE_PAGE]
  2535                              <1> 	;call	beeper
  2536                              <1> 	;retn
  2537 000087E5 E9719BFFFF          <1> 	jmp	beeper  ; beep ! and return
  2538                              <1> 
  2539                              <1> print_dir_strlen_check:
  2540 000087EA BE[0D780100]        <1> 	mov	esi, Current_Dir_Root
  2541 000087EF BF[21320100]        <1> 	mov	edi, Dir_Str_Root
  2542                              <1> 	
  2543                              <1> 	;xor	ecx, ecx
  2544 000087F4 8A0D[69780100]      <1>         mov     cl, [Current_Dir_StrLen]
  2545 000087FA FEC1                <1> 	inc	cl
  2546 000087FC 80F940              <1> 	cmp	cl, 64
  2547 000087FF 760D                <1> 	jna	short pass_print_dir_strlen_shorting
  2548 00008801 46                  <1> 	inc	esi
  2549 00008802 01CE                <1> 	add	esi, ecx
  2550 00008804 83EE40              <1> 	sub	esi, 64 
  2551 00008807 47                  <1> 	inc	edi
  2552 00008808 B82E2E2E20          <1> 	mov	eax, '... ' 
  2553 0000880D AB                  <1> 	stosd
  2554                              <1>  
  2555                              <1> pass_print_dir_strlen_shorting:
  2556 0000880E F3A4                <1> 	rep	movsb
  2557                              <1> 
  2558 00008810 BE[77310100]        <1> 	mov	esi, Dir_Drive_Str
  2559 00008815 E890E4FFFF          <1> 	call	print_msg
  2560                              <1> 
  2561 0000881A BE[D6310100]        <1> 	mov	esi, Vol_Serial_Header
  2562 0000881F E886E4FFFF          <1> 	call	print_msg
  2563                              <1> 
  2564 00008824 BE[16320100]        <1> 	mov	esi, Dir_Str_Header
  2565 00008829 E87CE4FFFF          <1> 	call	print_msg
  2566                              <1> 	
  2567 0000882E BE[493A0100]        <1> 	mov	esi, next2line
  2568 00008833 E872E4FFFF          <1> 	call	print_msg
  2569                              <1> 
  2570                              <1> loc_print_dir_first_file:
  2571 00008838 C605[49810100]10    <1> 	mov	byte [PrintDir_RowCounter], 16
  2572 0000883F 66A1[A8800100]      <1> 	mov	ax, [AttributesMask]
  2573 00008845 5E                  <1> 	pop	esi
  2574                              <1> 
  2575 00008846 E845020000          <1> 	call	find_first_file
  2576                              <1> 	;jc	loc_dir_ok
  2577                              <1> 	; 27/07/2022
  2578 0000884B 7305                <1> 	jnc	short loc_dfname_use_this
  2579 0000884D E97B010000          <1> 	jmp	loc_dir_ok
  2580                              <1> 	 
  2581                              <1> loc_dfname_use_this:
  2582                              <1> 	; bl =	File Attributes (bh = Long Name Entry Length)
  2583 00008852 F6C310              <1> 	test	bl, 10h  ; Is it a directory?
  2584 00008855 741B                <1> 	jz	short loc_not_dir
  2585                              <1> 
  2586 00008857 66FF05[34810100]    <1> 	inc	word [Dir_Count]
  2587 0000885E 89F2                <1> 	mov	edx, esi 	; FindFile_DirEntry address
  2588 00008860 BE[66330100]        <1>  	mov	esi, Type_Dir	; '<DIR>     '
  2589 00008865 BF[7D330100]        <1> 	mov	edi, Dir_Or_FileSize
  2590                              <1> 	; move 10 bytes
  2591 0000886A A5                  <1> 	movsd
  2592 0000886B A5                  <1> 	movsd
  2593 0000886C 66A5                <1> 	movsw	    	
  2594 0000886E 89D6                <1> 	mov	esi, edx
  2595 00008870 EB36                <1> 	jmp     short loc_dir_attribute
  2596                              <1> 
  2597                              <1> loc_not_dir:
  2598 00008872 66FF05[32810100]    <1> 	inc	word [File_Count]
  2599 00008879 0105[36810100]      <1> 	add	[Total_FSize], eax
  2600                              <1> 
  2601 0000887F B90A000000          <1> 	mov	ecx, 10  ; 32 bit divisor
  2602 00008884 89CF                <1> 	mov	edi, ecx
  2603 00008886 81C7[7D330100]      <1> 	add	edi, Dir_Or_FileSize
  2604                              <1> loc_dir_rdivide:
  2605 0000888C 29D2                <1> 	sub	edx, edx
  2606 0000888E F7F1                <1> 	div	ecx 	 ; remainder in dl (< 10)
  2607 00008890 80C230              <1> 	add     dl, '0'	 ; to make visible (ascii)
  2608 00008893 4F                  <1> 	dec	edi
  2609 00008894 8817                <1> 	mov     [edi], dl
  2610 00008896 21C0                <1> 	and	eax, eax
  2611 00008898 75F2                <1> 	jnz	short loc_dir_rdivide
  2612                              <1> 
  2613                              <1> loc_dir_fill_space:
  2614 0000889A 81FF[7D330100]      <1> 	cmp     edi, Dir_Or_FileSize
  2615 000088A0 7606                <1> 	jna     short loc_dir_attribute
  2616 000088A2 4F                  <1> 	dec     edi
  2617 000088A3 C60720              <1> 	mov     byte [edi], 20h
  2618 000088A6 EBF2                <1> 	jmp     short loc_dir_fill_space
  2619                              <1> 
  2620                              <1> loc_dir_attribute:
  2621 000088A8 C705[88330100]2020- <1> 	mov	dword [File_Attribute], 20202020h
  2621 000088B0 2020                <1>
  2622                              <1> 
  2623 000088B2 80FB20              <1> 	cmp	bl, 20h  ; Is it an archive file?
  2624 000088B5 7207                <1> 	jb	short loc_dir_pass_arch
  2625 000088B7 C605[8B330100]41    <1> 	mov	byte [File_Attribute+3], 'A'
  2626                              <1> 
  2627                              <1> loc_dir_pass_arch:
  2628 000088BE 80E307              <1> 	and	bl, 7
  2629 000088C1 7428                <1> 	jz	short loc_dir_file_name
  2630 000088C3 88DF                <1> 	mov	bh, bl
  2631 000088C5 80E303              <1> 	and	bl, 3
  2632 000088C8 38DF                <1> 	cmp	bh, bl
  2633 000088CA 7607                <1> 	jna	short loc_dir_pass_s
  2634 000088CC C605[88330100]53    <1> 	mov	byte [File_Attribute], 'S'
  2635                              <1> 
  2636                              <1> loc_dir_pass_s:
  2637 000088D3 80E302              <1> 	and     bl,2
  2638 000088D6 7407                <1> 	jz      short loc_dir_pass_h
  2639 000088D8 C605[89330100]48    <1> 	mov     byte [File_Attribute+1], 'H'
  2640                              <1> loc_dir_pass_h:
  2641 000088DF 80E701              <1> 	and     bh,1
  2642 000088E2 7407                <1> 	jz      short loc_dir_file_name
  2643 000088E4 C605[8A330100]52    <1> 	mov     byte [File_Attribute+2], 'R'
  2644                              <1> loc_dir_file_name:
  2645                              <1> 	;mov	bx, [esi+18h] ; Date
  2646                              <1> 	;mov	dx, [esi+16h] ; Time
  2647 000088EB 8B5E16              <1> 	mov	ebx, [esi+16h]
  2648 000088EE 89F1                <1> 	mov	ecx, esi ; FindFile_DirEntry address
  2649 000088F0 BF[70330100]        <1> 	mov     edi, File_Name
  2650                              <1> 	; move 8 bytes
  2651 000088F5 A5                  <1> 	movsd
  2652 000088F6 A5                  <1> 	movsd
  2653 000088F7 C60720              <1> 	mov	byte [edi], 20h
  2654 000088FA 47                  <1> 	inc	edi
  2655                              <1> 	; move 3 bytes
  2656 000088FB 66A5                <1> 	movsw
  2657 000088FD A4                  <1> 	movsb
  2658 000088FE 89CE                <1> 	mov	esi, ecx
  2659                              <1> 
  2660                              <1> Dir_Time_start:
  2661                              <1> 	;mov	ax, dx		; Time
  2662 00008900 6689D8              <1> 	mov	ax, bx
  2663 00008903 66C1E805            <1> 	shr	ax, 5		; shift right 5 times
  2664 00008907 6683E03F            <1> 	and	ax, 0000111111b	; Minute Mask
  2665 0000890B D40A                <1> 	aam			; Q([AL]/10)->AH
  2666                              <1> 				; R([AL]/10)->AL
  2667                              <1> 				; [AL]+[AH]= Minute as BCD
  2668 0000890D 660D3030            <1> 	or	ax, '00'	; Convert to ASCII
  2669 00008911 86E0                <1> 	xchg	ah, al
  2670 00008913 66A3[9B330100]      <1> 	mov	[File_Minute], ax
  2671                              <1> 
  2672                              <1> 	;mov	al, dh
  2673 00008919 88F8                <1> 	mov	al, bh
  2674 0000891B C0E803              <1> 	shr	al, 3		; shift right 3 times
  2675 0000891E D40A                <1> 	aam			; [AL]+[AH]= Hours as BCD
  2676 00008920 660D3030            <1> 	or	ax, '00'
  2677 00008924 86E0                <1> 	xchg	ah, al
  2678 00008926 66A3[98330100]      <1> 	mov     [File_Hour], ax
  2679                              <1> 
  2680 0000892C C1EB10              <1> 	shr	ebx, 16		; BX = Date
  2681                              <1> 	
  2682                              <1> Dir_Date_start:
  2683                              <1> 	;mov	ax, bx		; Date
  2684                              <1> 	; 27/07/2022
  2685 0000892F 89D8                <1> 	mov	eax, ebx
  2686 00008931 6683E01F            <1> 	and	ax, 00011111b	; Day Mask
  2687 00008935 D40A                <1> 	aam			; Q([AL]/10)->AH
  2688                              <1> 				; R([AL]/10)->AL
  2689                              <1> 				; [AL]+[AH]= Day as BCD
  2690 00008937 660D3030            <1> 	or	ax, '00'	; Convert to ASCII
  2691 0000893B 86C4                <1> 	xchg	al, ah
  2692                              <1> 
  2693 0000893D 66A3[8D330100]      <1> 	mov	[File_Day], ax
  2694                              <1> 
  2695                              <1> 	;mov	ax, bx
  2696                              <1> 	; 27/07/2022
  2697 00008943 89D8                <1> 	mov	eax, ebx
  2698                              <1> 	;shr	ax, 5		; shift right 5 times
  2699 00008945 C1E805              <1> 	shr	eax, 5
  2700 00008948 6683E00F            <1> 	and	ax, 00001111b	; Month Mask
  2701 0000894C D40A                <1> 	aam
  2702 0000894E 660D3030            <1> 	or	ax, '00'
  2703 00008952 86E0                <1> 	xchg	ah, al
  2704 00008954 66A3[90330100]      <1> 	mov	[File_Month], ax
  2705                              <1> 
  2706                              <1> 	;mov	ax, bx
  2707                              <1> 	; 27/07/2022
  2708 0000895A 89D8                <1> 	mov	eax, ebx
  2709                              <1> 	;shr	ax, 9
  2710 0000895C C1E809              <1> 	shr	eax, 9
  2711 0000895F 6683E07F            <1> 	and	ax, 01111111b	; Result = Year - 1980
  2712 00008963 6605BC07            <1> 	add	ax, 1980
  2713                              <1> 
  2714 00008967 B10A                <1> 	mov	cl, 10
  2715 00008969 F6F1                <1> 	div	cl		; Q -> AL, R -> AH 
  2716 0000896B 80CC30              <1> 	or	ah, '0'
  2717 0000896E 8825[96330100]      <1> 	mov	[File_Year+3], ah
  2718 00008974 D40A                <1> 	aam
  2719 00008976 86E0                <1> 	xchg	ah, al
  2720 00008978 80CC30              <1> 	or	ah, '0'	  ; Convert to ASCII
  2721 0000897B 8825[95330100]      <1> 	mov	[File_Year+2], ah
  2722 00008981 D40A                <1> 	aam
  2723 00008983 86C4                <1> 	xchg	al, ah
  2724 00008985 660D3030            <1> 	or	ax, '00'
  2725 00008989 66A3[93330100]      <1> 	mov	[File_Year], ax
  2726                              <1> 
  2727                              <1> loc_show_line:
  2728 0000898F 56                  <1> 	push	esi
  2729 00008990 BE[70330100]        <1> 	mov     esi, File_Name
  2730 00008995 E810E3FFFF          <1> 	call	print_msg
  2731 0000899A BE[4B3A0100]        <1> 	mov	esi, nextline
  2732 0000899F E806E3FFFF          <1> 	call	print_msg
  2733 000089A4 5E                  <1> 	pop	esi
  2734                              <1> 
  2735 000089A5 FE0D[49810100]      <1> 	dec	byte [PrintDir_RowCounter]
  2736 000089AB 740C                <1> 	jz	short pause_dir_scroll ; 27/07/2022
  2737                              <1> 
  2738                              <1> loc_next_entry:
  2739 000089AD E88B010000          <1> 	call	find_next_file
  2740                              <1> 	;jnc	loc_dfname_use_this
  2741                              <1> 	; 27/07/2022
  2742 000089B2 7219                <1> 	jc	short loc_dir_ok
  2743 000089B4 E999FEFFFF          <1> 	jmp	loc_dfname_use_this
  2744                              <1> 
  2745                              <1> 	; 27/07/2022
  2746                              <1> pause_dir_scroll:
  2747 000089B9 28E4                <1> 	sub	ah, ah           
  2748 000089BB E83885FFFF          <1> 	call	int16h
  2749 000089C0 3C1B                <1> 	cmp	al, 1Bh
  2750 000089C2 7409                <1> 	je	short loc_dir_ok
  2751 000089C4 C605[49810100]10    <1> 	mov	byte [PrintDir_RowCounter], 16 ; Reset counter
  2752 000089CB EBE0                <1>         jmp     short loc_next_entry
  2753                              <1> 
  2754                              <1> loc_dir_ok:
  2755 000089CD B90A000000          <1> 	mov     ecx, 10
  2756                              <1> 	;mov	ax, [Dir_Count]
  2757                              <1> 	; 27/07/2022
  2758 000089D2 0FB705[34810100]    <1> 	movzx	eax, word [Dir_Count]
  2759 000089D9 BF[B1330100]        <1> 	mov	edi, Decimal_Dir_Count
  2760                              <1> 	;cmp	ax, cx ; 10
  2761                              <1> 	; 27/07/2022
  2762 000089DE 39C8                <1> 	cmp	eax, ecx
  2763 000089E0 7216                <1> 	jb	short pass_ddc
  2764 000089E2 47                  <1> 	inc	edi
  2765 000089E3 6683F864            <1> 	cmp	ax, 100
  2766 000089E7 720F                <1> 	jb	short pass_ddc
  2767 000089E9 47                  <1> 	inc	edi
  2768 000089EA 663DE803            <1> 	cmp	ax, 1000
  2769 000089EE 7208                <1> 	jb	short pass_ddc
  2770 000089F0 47                  <1> 	inc	edi
  2771 000089F1 663D1027            <1> 	cmp	ax, 10000
  2772 000089F5 7201                <1> 	jb	short pass_ddc
  2773 000089F7 47                  <1> 	inc	edi
  2774                              <1> pass_ddc:
  2775 000089F8 886F01              <1> 	mov     [edi+1], ch ; 0
  2776                              <1> loc_ddc_rediv:
  2777 000089FB 31D2                <1> 	xor     edx, edx
  2778                              <1> 	;div	cx  ; 10
  2779                              <1> 	; 27/07/2022
  2780 000089FD F7F1                <1> 	div	ecx
  2781 000089FF 80C230              <1> 	add     dl, '0'
  2782 00008A02 8817                <1> 	mov     [edi], dl
  2783 00008A04 4F                  <1> 	dec     edi
  2784                              <1> 	;or	ax, ax
  2785                              <1> 	; 27/07/2022
  2786 00008A05 09C0                <1> 	or	eax, eax
  2787 00008A07 75F2                <1> 	jnz	short loc_ddc_rediv
  2788                              <1> 
  2789 00008A09 66A1[32810100]      <1> 	mov     ax, [File_Count]
  2790 00008A0F BF[A0330100]        <1> 	mov     edi, Decimal_File_Count
  2791                              <1> 	;cmp	ax, cx ; 10
  2792                              <1> 	; 27/07/2022
  2793 00008A14 39C8                <1> 	cmp	eax, ecx ; 10
  2794 00008A16 7216                <1> 	jb      short pass_dfc
  2795 00008A18 47                  <1> 	inc     edi
  2796 00008A19 6683F864            <1> 	cmp     ax, 100
  2797 00008A1D 720F                <1> 	jb      short pass_dfc
  2798 00008A1F 47                  <1> 	inc     edi
  2799 00008A20 663DE803            <1> 	cmp     ax, 1000
  2800 00008A24 7208                <1> 	jb      short pass_dfc
  2801 00008A26 47                  <1> 	inc     edi
  2802 00008A27 663D1027            <1> 	cmp     ax, 10000
  2803 00008A2B 7201                <1> 	jb      short pass_dfc
  2804 00008A2D 47                  <1> 	inc     edi
  2805                              <1> pass_dfc:
  2806                              <1> 	;mov    cx, 10
  2807 00008A2E 886F01              <1> 	mov     [edi+1], ch ; 00
  2808                              <1> loc_dfc_rediv:
  2809                              <1> 	;;xor	dx, dx
  2810                              <1> 	;xor	dl, dl
  2811                              <1> 	;div	cx
  2812                              <1> 	; 27/07/022
  2813 00008A31 31D2                <1> 	xor	edx, edx
  2814 00008A33 F7F1                <1> 	div	ecx
  2815 00008A35 80C230              <1> 	add	dl, '0'
  2816 00008A38 8817                <1> 	mov	[edi], dl
  2817 00008A3A 4F                  <1> 	dec	edi
  2818                              <1> 	;or	ax, ax
  2819                              <1> 	; 27/07/2022
  2820 00008A3B 09C0                <1> 	or	eax, eax
  2821 00008A3D 75F2                <1> 	jnz	short loc_dfc_rediv
  2822                              <1> 
  2823 00008A3F BF[48810100]        <1> 	mov     edi, TFS_Dec_End
  2824                              <1>         ;mov    byte [edi], 0
  2825 00008A44 A1[36810100]        <1> 	mov     eax, [Total_FSize]
  2826                              <1> 	;mov    ecx, 10
  2827                              <1> rediv_tfs_hex:
  2828 00008A49 29D2                <1> 	sub	edx, edx ; 27/07/2022
  2829                              <1> 	;sub	dl, dl
  2830 00008A4B F7F1                <1> 	div	ecx
  2831 00008A4D 80C230              <1> 	add	dl, '0'
  2832 00008A50 4F                  <1> 	dec     edi
  2833 00008A51 8817                <1> 	mov     [edi], dl
  2834 00008A53 21C0                <1> 	and	eax, eax
  2835 00008A55 75F2                <1> 	jnz	short rediv_tfs_hex
  2836                              <1> 	
  2837 00008A57 893D[3A810100]      <1> 	mov	[TFS_Dec_Begin], edi
  2838 00008A5D BE[9E330100]        <1> 	mov	esi, Decimal_File_Count_Header
  2839 00008A62 E843E2FFFF          <1> 	call	print_msg
  2840 00008A67 BE[A6330100]        <1> 	mov	esi, str_files
  2841 00008A6C E839E2FFFF          <1> 	call	print_msg
  2842 00008A71 BE[B7330100]        <1> 	mov	esi, str_dirs
  2843 00008A76 E82FE2FFFF          <1> 	call	print_msg
  2844 00008A7B 8B35[3A810100]      <1> 	mov	esi, [TFS_Dec_Begin]
  2845 00008A81 E824E2FFFF          <1> 	call	print_msg
  2846 00008A86 BE[C8330100]        <1> 	mov	esi, str_bytes
  2847                              <1> 	;call	print_msg
  2848                              <1> 	;retn
  2849                              <1> 	; 27/07/2022
  2850 00008A8B E91AE2FFFF          <1> 	jmp	print_msg
  2851                              <1> 
  2852                              <1> find_first_file:
  2853                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  2854                              <1> 	; 11/02/2016
  2855                              <1> 	; 10/02/2016
  2856                              <1> 	; 08/02/2016 (TRDOS 386 = TRDOS v2.0)
  2857                              <1> 	; 09/10/2011
  2858                              <1> 	; 17/09/2009
  2859                              <1> 	; 2005
  2860                              <1> 	; INPUT ->
  2861                              <1> 	;	ESI = ASCIIZ File/Dir Name Address (in Current Directory)
  2862                              <1> 	;	AL = Attributes AND mask (The AND result must be equal to AL)
  2863                              <1> 	;	      bit 0 = Read Only
  2864                              <1> 	;	      bir 1 = Hidden
  2865                              <1> 	;	      bit 2 = System
  2866                              <1> 	;	      bit 3 = Volume Label
  2867                              <1> 	;	      bit 4 = Directory
  2868                              <1> 	;	      bit 5 = Archive
  2869                              <1> 	;	      bit 6 = Reserved, must be 0
  2870                              <1> 	;	      bit 7 = Reserved, must be 0
  2871                              <1> 	;       AH = Attributes Negative AND mask (The AND result must be ZERO)
  2872                              <1> 	;
  2873                              <1> 	; OUTPUT ->
  2874                              <1> 	;	CF = 1 -> Error, Error Code in EAX (AL)
  2875                              <1> 	;	CF = 0 ->
  2876                              <1> 	;	     ESI = Directory Entry (FindFile_DirEntry) Location
  2877                              <1> 	;	     EDI = Directory Buffer Directory Entry Location
  2878                              <1> 	;	     EAX = File Size
  2879                              <1> 	;	      BL = Attributes of The File/Directory
  2880                              <1> 	;	      BH = Long Name Yes/No Status (>0 is YES)
  2881                              <1> 	;             DX > 0 : Ambiguous filename chars are used
  2882                              <1> 	;
  2883                              <1> 	; (EAX, EBX, ECX, EDX, ESI, EDI will be changed)
  2884                              <1> 
  2885 00008A90 66A3[FA800100]      <1> 	mov	[FindFile_AttributesMask], ax
  2886 00008A96 BF[FC800100]        <1> 	mov	edi, FindFile_DirEntry ; TR-DOS Fullfilename formatted buffer
  2887 00008A9B 31C0                <1> 	xor	eax, eax
  2888                              <1> 	;mov	ecx, 11
  2889                              <1> 	; 28/07/2022
  2890 00008A9D 31C9                <1> 	xor	ecx, ecx
  2891 00008A9F B10B                <1> 	mov	cl, 11
  2892 00008AA1 F3AB                <1> 	rep	stosd	; 44 bytes
  2893                              <1> 	;stosw		; +2 bytes 
  2894                              <1> 	    
  2895 00008AA3 BF[EC800100]        <1> 	mov	edi, FindFile_Name ; FFF structure, offset 66
  2896 00008AA8 39FE                <1> 	cmp	esi, edi
  2897 00008AAA 7408                <1> 	je	short loc_fff_mfn_ok
  2898 00008AAC 89FA                <1> 	mov	edx, edi 
  2899                              <1> 	; move 13 bytes
  2900 00008AAE A5                  <1> 	movsd
  2901 00008AAF A5                  <1> 	movsd
  2902 00008AB0 A5                  <1> 	movsd
  2903 00008AB1 AA                  <1> 	stosb
  2904 00008AB2 89D6                <1> 	mov	esi, edx
  2905                              <1> loc_fff_mfn_ok:
  2906 00008AB4 BF[9B800100]        <1> 	mov	edi, Dir_Entry_Name ; Dir Entry Format File Name
  2907 00008AB9 E8CC1F0000          <1> 	call	convert_file_name
  2908 00008ABE 89FE                <1> 	mov	esi, edi ; offset Dir_Entry_Name
  2909                              <1> 
  2910 00008AC0 66A1[FA800100]      <1> 	mov	ax, [FindFile_AttributesMask]
  2911                              <1> 	;xor	ecx, ecx
  2912 00008AC6 30C9                <1> 	xor	cl, cl  
  2913 00008AC8 E8EE1C0000          <1> 	call	locate_current_dir_file
  2914 00008ACD 726D                <1> 	jc	short loc_fff_retn
  2915                              <1> 	; EDI = Directory Entry
  2916                              <1> 	; EBX = Directory Buffer Entry Index/Number
  2917                              <1> 
  2918                              <1> loc_fff_fnf_ln_check:
  2919 00008ACF 30ED                <1> 	xor	ch, ch 
  2920 00008AD1 80F60F              <1> 	xor	dh, 0Fh
  2921 00008AD4 7408                <1> 	jz	short loc_fff_longname_yes
  2922 00008AD6 882D[F9800100]      <1> 	mov	[FindFile_LongNameYes], ch ; 0
  2923 00008ADC EB0C                <1> 	jmp	short loc_fff_longname_no
  2924                              <1> 
  2925                              <1> loc_fff_longname_yes:
  2926                              <1> 	;inc	byte [FindFile_LongNameYes]
  2927 00008ADE 8A0D[06800100]      <1> 	mov	cl, [LFN_EntryLength]  
  2928 00008AE4 880D[F9800100]      <1> 	mov	[FindFile_LongNameEntryLength], cl ; FindFile_LongNameYes
  2929                              <1> 
  2930                              <1> loc_fff_longname_no:
  2931                              <1> 	;mov	bx, [DirBuff_CurrentEntry]
  2932 00008AEA 66891D[24810100]    <1> 	mov	[FindFile_DirEntryNumber], bx
  2933                              <1> 	;mov	dx, ax ; Ambiguous Filename chars used sign > 0
  2934                              <1> 	; 28/07/2022
  2935 00008AF1 89C2                <1> 	mov	edx, eax
  2936                              <1> 
  2937 00008AF3 A0[0A780100]        <1> 	mov	al, [Current_Drv]
  2938 00008AF8 A2[AA800100]        <1> 	mov	[FindFile_Drv], al 
  2939                              <1> 
  2940 00008AFD A1[04780100]        <1> 	mov	eax, [Current_Dir_FCluster]
  2941 00008B02 A3[1C810100]        <1> 	mov	[FindFile_DirFirstCluster], eax
  2942                              <1> 
  2943 00008B07 A1[367F0100]        <1> 	mov	eax, [DirBuff_Cluster]
  2944 00008B0C A3[20810100]        <1> 	mov	[FindFile_DirCluster], eax
  2945                              <1> 
  2946 00008B11 66FF05[26810100]    <1> 	inc	word [FindFile_MatchCounter]
  2947                              <1> 
  2948 00008B18 89FB                <1> 	mov	ebx, edi
  2949 00008B1A 89FE                <1> 	mov	esi, edi
  2950 00008B1C BF[FC800100]        <1> 	mov	edi, FindFile_DirEntry
  2951 00008B21 89F8                <1> 	mov	eax, edi
  2952 00008B23 B108                <1> 	mov	cl, 8
  2953 00008B25 F3A5                <1> 	rep	movsd
  2954 00008B27 89C6                <1> 	mov	esi, eax
  2955 00008B29 89DF                <1> 	mov	edi, ebx
  2956                              <1> 
  2957 00008B2B A1[18810100]        <1> 	mov	eax, [FindFile_DirEntry+28] ; File Size
  2958                              <1> 
  2959 00008B30 8A1D[07810100]      <1> 	mov	bl, [FindFile_DirEntry+11] ; File Attributes 
  2960 00008B36 8A3D[F9800100]      <1> 	mov	bh, [FindFile_LongNameYes]
  2961                              <1> 
  2962                              <1> 	;mov	cx, [DirBuff_EntryCounter]
  2963                              <1> 	;mov	[FindFile_DirEntryNumber], cx
  2964                              <1> 	;mov	cx, [FindFile_DirEntryNumber]
  2965                              <1> 	; ecx = 0
  2966                              <1> 
  2967                              <1> loc_fff_retn:
  2968 00008B3C C3                  <1> 	retn
  2969                              <1> 
  2970                              <1> find_next_file:
  2971                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  2972                              <1> 	; 15/10/2016
  2973                              <1> 	; 10/02/2016
  2974                              <1> 	; 08/02/2016 (TRDOS 386 = TRDOS v2.0)
  2975                              <1> 	; 06/02/2011
  2976                              <1> 	; 17/09/2009
  2977                              <1> 	; 2005
  2978                              <1> 	; INPUT ->
  2979                              <1> 	;	NONE, Find First File Parameters
  2980                              <1> 	; OUTPUT ->
  2981                              <1> 	;	CF = 1 -> Error, Error Code in EAX (AL)
  2982                              <1> 	;	CF = 0 -> 
  2983                              <1> 	;	    ESI = Directory Entry (FindFile_DirEntry) Location
  2984                              <1> 	;	    EDI = Directory Buffer Directory Entry Location
  2985                              <1> 	;	    EAX = File Size
  2986                              <1> 	;	      BL = Attributes of The File/Directory
  2987                              <1> 	;	      BH = Long Name Yes/No Status (>0 is YES)
  2988                              <1> 	;             DX > 0 : Ambiguous filename chars are used 
  2989                              <1> 	;
  2990                              <1> 	; (EAX, EBX, ECX, EDX, ESI, EDI will be changed)
  2991                              <1> 
  2992 00008B3D 66833D[26810100]00  <1> 	cmp	word [FindFile_MatchCounter], 0
  2993 00008B45 7707                <1> 	ja	short loc_start_search_next_file
  2994                              <1> 
  2995                              <1> loc_fnf_stc_retn:
  2996 00008B47 F9                  <1> 	stc
  2997                              <1> loc_fnf_ax12h_retn:
  2998 00008B48 B80C000000          <1> 	mov	eax, 12 ; No More files
  2999                              <1> ;loc_fnf_retn:
  3000 00008B4D C3                  <1> 	retn
  3001                              <1> 
  3002                              <1> loc_start_search_next_file:
  3003 00008B4E 668B1D[24810100]    <1> 	mov	bx, [FindFile_DirEntryNumber]
  3004                              <1> 	;inc	bx
  3005                              <1> 	; 28/07/2022
  3006 00008B55 43                  <1> 	inc	ebx
  3007 00008B56 663B1D[347F0100]    <1> 	cmp	bx, [DirBuff_LastEntry]
  3008 00008B5D 7719                <1> 	ja	short loc_cont_search_next_file
  3009                              <1> 
  3010                              <1> loc_fnf_search:
  3011 00008B5F BE[9B800100]        <1> 	mov	esi, Dir_Entry_Name
  3012 00008B64 66A1[FA800100]      <1> 	mov	ax, [FindFile_AttributesMask]
  3013                              <1> 	;xor	cx, cx
  3014                              <1> 	; 28/07/2022
  3015 00008B6A 31C9                <1> 	xor	ecx, ecx
  3016 00008B6C E8481D0000          <1> 	call	find_directory_entry
  3017                              <1> 	;jnc	loc_fff_fnf_ln_check
  3018                              <1> 	; 28/07/2022
  3019 00008B71 7205                <1> 	jc	short loc_cont_search_next_file
  3020 00008B73 E957FFFFFF          <1> 	jmp	loc_fff_fnf_ln_check
  3021                              <1> 
  3022                              <1> loc_cont_search_next_file:
  3023 00008B78 31DB                <1> 	xor	ebx, ebx
  3024 00008B7A 8A3D[0A780100]      <1> 	mov	bh, [Current_Drv]
  3025 00008B80 BE00010900          <1> 	mov	esi, Logical_DOSDisks
  3026 00008B85 01DE                <1> 	add	esi, ebx
  3027                              <1> 
  3028 00008B87 803D[08780100]00    <1> 	cmp	byte [Current_Dir_Level], 0
  3029 00008B8E 7608                <1> 	jna	short loc_fnf_check_FAT_type
  3030 00008B90 807E0301            <1> 	cmp	byte [esi+LD_FATType], 1
  3031 00008B94 72B2                <1> 	jb	short loc_fnf_ax12h_retn
  3032 00008B96 EB06                <1> 	jmp	short loc_fnf_check_next_cluster
  3033                              <1>  
  3034                              <1> loc_fnf_check_FAT_type:
  3035 00008B98 807E0303            <1> 	cmp	byte [esi+LD_FATType], 3
  3036 00008B9C 72AA                <1> 	jb	short loc_fnf_ax12h_retn
  3037                              <1> 
  3038                              <1> loc_fnf_check_next_cluster:
  3039 00008B9E A1[367F0100]        <1> 	mov	eax, [DirBuff_Cluster]
  3040 00008BA3 E85F360000          <1> 	call	get_next_cluster
  3041 00008BA8 7306                <1> 	jnc	short loc_fnf_load_next_dir_cluster
  3042 00008BAA 09C0                <1> 	or	eax, eax
  3043 00008BAC 7499                <1> 	jz	short loc_fnf_stc_retn
  3044                              <1> 	;mov	eax, 17 ;Drive not ready or read error
  3045 00008BAE F5                  <1>  	cmc	;stc
  3046                              <1> loc_fnf_retn:
  3047 00008BAF C3                  <1> 	retn
  3048                              <1> 
  3049                              <1> loc_fnf_load_next_dir_cluster:
  3050 00008BB0 E80E380000          <1> 	call	load_FAT_sub_directory
  3051 00008BB5 72F8                <1> 	jc	short loc_fnf_retn
  3052                              <1> 	;xor	bx, bx
  3053                              <1> 	; 28/07/2022
  3054 00008BB7 31DB                <1> 	xor	ebx, ebx
  3055 00008BB9 66891D[24810100]    <1> 	mov	[FindFile_DirEntryNumber], bx
  3056 00008BC0 EB9D                <1> 	jmp	short loc_fnf_search
  3057                              <1> 
  3058                              <1> get_and_print_longname:
  3059                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  3060                              <1> 	; 16/10/2016
  3061                              <1> 	; 13/02/2016 (TRDOS 386 = TRDOS v2.0)
  3062                              <1> 	; 24/01/2010
  3063                              <1> 	; 17/10/2009 (CMD_INTR.ASM, 'cmp_cmd_longname')
  3064                              <1> get_longname_fchar:
  3065 00008BC2 803E20              <1> 	cmp	byte [esi], 20h
  3066 00008BC5 7701                <1> 	ja	short loc_find_longname
  3067                              <1> 	;jb	short loc_longname_retn
  3068                              <1> 	;inc	esi
  3069                              <1> 	;je	short get_longname_fchar
  3070                              <1> ;loc_longname_retn:
  3071 00008BC7 C3                  <1> 	retn
  3072                              <1> loc_find_longname:
  3073 00008BC8 E82A200000          <1> 	call	find_longname
  3074 00008BCD 731D                <1> 	jnc	short loc_print_longname
  3075                              <1> 	
  3076 00008BCF 08C0                <1> 	or	al, al
  3077 00008BD1 7412                <1> 	jz	short loc_longname_not_found
  3078                              <1> 	  
  3079                              <1> 	; 16/10/2016 (15h -> 15, 17)
  3080 00008BD3 3C0F                <1> 	cmp	al, 15
  3081                              <1> 	;je	cd_drive_not_ready ; drive not ready
  3082                              <1> 	; 28/07/2022
  3083 00008BD5 7505                <1> 	jne	short loc_fln_err2
  3084                              <1> loc_fln_err1:
  3085 00008BD7 E963F8FFFF          <1> 	jmp	cd_drive_not_ready	
  3086                              <1> loc_fln_err2:
  3087                              <1> 				   ; or
  3088 00008BDC 3C11                <1> 	cmp	al, 17		   ; read error	
  3089                              <1> 	;je	cd_drive_not_ready
  3090                              <1> 	; 28/07/2022
  3091                              <1> 	;je	short loc_fln_err1 
  3092                              <1> 
  3093                              <1> loc_ln_file_dir_not_found:
  3094 00008BDE BE[F2320100]        <1> 	mov	esi, Msg_File_Directory_Not_Found
  3095                              <1> 	;;call	print_msg
  3096                              <1>         ;;retn
  3097                              <1> 	;jmp	print_msg
  3098                              <1> 	; 28/07/2022
  3099 00008BE3 EB2B                <1> 	jmp	short loc_lfn_err3
  3100                              <1> 
  3101                              <1> loc_longname_not_found:
  3102 00008BE5 BE[11330100]        <1>         mov     esi, Msg_LongName_Not_Found
  3103                              <1> 	;;call	print_msg
  3104                              <1>         ;;retn
  3105                              <1> 	;jmp	print_msg
  3106                              <1> 	; 28/07/2022
  3107 00008BEA EB24                <1> 	jmp	short loc_lfn_err3
  3108                              <1> 
  3109                              <1> loc_print_longname:
  3110                              <1> 	;mov	esi, LongFileName
  3111 00008BEC BF[0A790100]        <1> 	mov	edi, TextBuffer
  3112 00008BF1 57                  <1> 	push	edi 
  3113 00008BF2 3C00                <1> 	cmp	al, 0
  3114 00008BF4 7708                <1> 	ja	short loc_print_longname_1
  3115                              <1> loc_print_FS_longname: ; Singlix FS (64 byte ASCIIZ file name)
  3116 00008BF6 AC                  <1> 	lodsb
  3117 00008BF7 AA                  <1> 	stosb  
  3118 00008BF8 08C0                <1> 	or	al, al
  3119 00008BFA 75FA                <1> 	jnz	short loc_print_FS_longname
  3120 00008BFC EB07                <1> 	jmp	short loc_print_longname_2
  3121                              <1> 	;
  3122                              <1> loc_print_longname_1: ; MS Windows long name (UNICODE chars)
  3123 00008BFE 66AD                <1> 	lodsw
  3124 00008C00 AA                  <1> 	stosb  
  3125 00008C01 08C0                <1> 	or	al, al
  3126 00008C03 75F9                <1> 	jnz	short loc_print_longname_1
  3127                              <1> 	;
  3128                              <1> loc_print_longname_2:	
  3129 00008C05 5E                  <1> 	pop	esi
  3130 00008C06 E89FE0FFFF          <1> 	call	print_msg
  3131 00008C0B BE[4B3A0100]        <1>   	mov	esi, nextline
  3132                              <1> loc_lfn_err3:
  3133                              <1> 	;call	print_msg
  3134                              <1> 	;retn
  3135 00008C10 E995E0FFFF          <1> 	jmp	print_msg	
  3136                              <1> 
  3137                              <1> show_file:
  3138                              <1> 	; 07/08/2022
  3139                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  3140                              <1> 	; 18/02/2016
  3141                              <1> 	; 17/02/2016
  3142                              <1> 	; 15/02/2016 (TRDOS 386 = TRDOS v2.0)
  3143                              <1> 	; 13/09/2011 (CMD_INTR.ASM, 'cmp_cmd_show')
  3144                              <1> 	; 08/11/2009
  3145                              <1> 
  3146                              <1> loc_show_parse_path_name:
  3147 00008C15 BF[AA800100]        <1> 	mov	edi, FindFile_Drv
  3148 00008C1A E8351F0000          <1> 	call	parse_path_name
  3149                              <1> 	;jc	loc_cmd_failed
  3150                              <1> 	; 28/07/2022
  3151 00008C1F 7305                <1> 	jnc	short loc_show_check_filename_exists
  3152                              <1> show_file_err1:
  3153 00008C21 E983F9FFFF          <1> 	jmp	loc_cmd_failed
  3154                              <1> 
  3155                              <1> loc_show_check_filename_exists:
  3156 00008C26 BE[EC800100]        <1> 	mov	esi, FindFile_Name
  3157 00008C2B 803E20              <1> 	cmp	byte [esi], 20h
  3158                              <1> 	;jna	loc_cmd_failed
  3159                              <1> 	; 28/07/2022
  3160 00008C2E 76F1                <1> 	jna	short show_file_err1
  3161                              <1> 
  3162                              <1> 	; 15/02/2016 (invalid file name check)
  3163 00008C30 E800020000          <1> 	call	check_filename 	
  3164 00008C35 730A                <1> 	jnc	short loc_show_change_drv
  3165                              <1> 
  3166 00008C37 BE[DE330100]        <1> 	mov	esi, Msg_invalid_name_chars
  3167 00008C3C E969E0FFFF          <1> 	jmp	print_msg
  3168                              <1>    
  3169                              <1> loc_show_change_drv:
  3170 00008C41 8A35[0A780100]      <1> 	mov	dh, [Current_Drv]
  3171 00008C47 8835[677F0100]      <1> 	mov	[RUN_CDRV], dh
  3172 00008C4D 8A15[AA800100]      <1> 	mov	dl, [FindFile_Drv]
  3173 00008C53 38F2                <1> 	cmp	dl, dh
  3174 00008C55 740C                <1> 	je	short loc_show_change_directory
  3175 00008C57 E886EBFFFF          <1> 	call	change_current_drive
  3176                              <1> 	;;jc	loc_file_rw_cmd_failed
  3177                              <1> 	;jc	loc_run_cmd_failed
  3178                              <1> 	; 28/07/2022
  3179 00008C5C 7305                <1> 	jnc	short loc_show_change_directory
  3180                              <1> show_file_err2:
  3181 00008C5E E971F9FFFF          <1> 	jmp	loc_run_cmd_failed
  3182                              <1> 
  3183                              <1> loc_show_change_directory:
  3184 00008C63 803D[AB800100]20    <1> 	cmp	byte [FindFile_Directory], 20h
  3185 00008C6A 7614                <1> 	jna	short loc_findload_showfile
  3186                              <1> 
  3187 00008C6C FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  3188 00008C72 BE[AB800100]        <1> 	mov	esi, FindFile_Directory
  3189 00008C77 30E4                <1> 	xor	ah, ah ; CD_COMMAND sign -> 0 
  3190 00008C79 E8EA180000          <1> 	call	change_current_directory
  3191                              <1> 	;;jc	loc_file_rw_cmd_failed
  3192                              <1> 	;jc	loc_run_cmd_failed
  3193                              <1> 	; 28/07/2022
  3194 00008C7E 72DE                <1> 	jc	short show_file_err2
  3195                              <1> 
  3196                              <1> ;loc_show_change_prompt_dir_string:
  3197                              <1> 	;call	change_prompt_dir_string
  3198                              <1> 
  3199                              <1> loc_findload_showfile:
  3200                              <1> 	; 15/02/2016
  3201 00008C80 BE[EC800100]        <1> 	mov	esi, FindFile_Name
  3202 00008C85 BF[9B800100]        <1> 	mov	edi, Dir_Entry_Name ; Dir Entry Format File Name
  3203 00008C8A E8FB1D0000          <1> 	call	convert_file_name
  3204 00008C8F 89FE                <1> 	mov	esi, edi ; offset Dir_Entry_Name
  3205                              <1> 
  3206 00008C91 28C0                <1> 	sub	al, al	; Attrib AND mask = 0
  3207                              <1> 	; Directory attribute : 10h
  3208                              <1> 	; Volume name attribute: 8h
  3209 00008C93 B418                <1> 	mov	ah, 00011000b ; 18h (Attrib NAND, AND --> zero mask)
  3210                              <1> 	;
  3211                              <1> 	;xor	cx, cx  
  3212                              <1> 	; 28/07/2022
  3213 00008C95 31C9                <1> 	xor	ecx, ecx
  3214 00008C97 E81F1B0000          <1> 	call	locate_current_dir_file
  3215                              <1> 	;;jc	loc_file_rw_cmd_failed
  3216                              <1> 	;jc	loc_run_cmd_failed
  3217                              <1> 	; 28/07/2022
  3218 00008C9C 72C0                <1> 	jc	short show_file_err2
  3219                              <1> 
  3220                              <1> loc_show_load_file:
  3221                              <1> 	; EDI = Directory Entry
  3222 00008C9E 668B4714            <1> 	mov	ax, [edi+DirEntry_FstClusHI] ; First Cluster High Word
  3223 00008CA2 C1E010              <1> 	shl	eax, 16
  3224 00008CA5 668B471A            <1> 	mov	ax, [edi+DirEntry_FstClusLO] ; First Cluster Low Word
  3225 00008CA9 A3[54810100]        <1> 	mov	[Show_Cluster], eax
  3226 00008CAE 8B471C              <1> 	mov	eax, [edi+DirEntry_FileSize] ; File Size
  3227 00008CB1 21C0                <1> 	and	eax, eax ; Empty file !
  3228                              <1> 	;jz	end_of_show_file
  3229                              <1> 	; 28/07/2022
  3230 00008CB3 7505                <1> 	jnz	short loc_show_load_file_set_size
  3231 00008CB5 E904010000          <1> 	jmp	end_of_show_file 
  3232                              <1> 
  3233                              <1> loc_show_load_file_set_size: ; 28/07/2022
  3234 00008CBA A3[58810100]        <1> 	mov	[Show_FileSize], eax
  3235 00008CBF 31C0                <1> 	xor	eax, eax
  3236 00008CC1 A3[5C810100]        <1> 	mov	[Show_FilePointer], eax ; 0
  3237 00008CC6 66A3[60810100]      <1> 	mov	[Show_ClusterPointer], ax ; 0
  3238 00008CCC 29DB                <1> 	sub	ebx, ebx
  3239 00008CCE 8A3D[0A780100]      <1> 	mov	bh, [Current_Drv]
  3240 00008CD4 BE00010900          <1> 	mov	esi, Logical_DOSDisks
  3241 00008CD9 01DE                <1> 	add	esi, ebx
  3242 00008CDB 8935[50810100]      <1> 	mov	[Show_LDDDT], esi ; Logical DOS Drv Description Table addr
  3243                              <1> 
  3244 00008CE1 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0	
  3245 00008CE5 7713                <1> 	ja	short loc_show_calculate_cluster_size
  3246                              <1> 	; Singlix FS
  3247                              <1> 	; First Cluster Number is FDT number (in compatibility buffer)
  3248 00008CE7 8B15[54810100]      <1> 	mov	edx, [Show_Cluster] ; Compatibility dir. buffer value (FDT)	
  3249 00008CED 8915[4C810100]      <1> 	mov	[Show_FDT], edx
  3250 00008CF3 31C0                <1> 	xor	eax, eax
  3251 00008CF5 A3[54810100]        <1> 	mov	[Show_Cluster], eax ; Sector index  = 0
  3252                              <1> 				    ; (next time it will be 1)			
  3253                              <1> loc_show_calculate_cluster_size:
  3254 00008CFA 668B5E11            <1> 	mov	bx, [esi+LD_BPB+BPB_BytsPerSec] ; FAT 12-16-32 (512)
  3255                              <1> 	; BX = 512 = [esi+LD_FS_BytesPerSec] ; Singlix FS	
  3256 00008CFE 8A4613              <1> 	mov	al, [esi+LD_BPB+BPB_SecPerClust] ; FAT 12-16-32 (<= 128)
  3257                              <1> 	; AL = 1 = [esi+LD_FS_Reserved2] ; SectPerClust for Singlix FS
  3258 00008D01 F7E3                <1> 	mul	ebx	
  3259                              <1> 
  3260                              <1> 	;cmp	eax, 65536 ; non-compatible (very big) cluster size
  3261                              <1> 	;ja	short end_of_show_file	
  3262 00008D03 66A3[62810100]      <1> 	mov	[Show_ClusterSize], ax
  3263                              <1> 
  3264                              <1> loc_start_show_file:
  3265 00008D09 BE[4B3A0100]        <1> 	mov	esi, nextline
  3266 00008D0E E897DFFFFF          <1> 	call	print_msg
  3267                              <1> 
  3268 00008D13 A1[54810100]        <1> 	mov	eax, [Show_Cluster]
  3269 00008D18 C605[64810100]17    <1> 	mov	byte [Show_RowCount], 23
  3270                              <1> 
  3271                              <1> 	; 17/02/2016
  3272 00008D1F 8B35[50810100]      <1> 	mov	esi, [Show_LDDDT]
  3273                              <1> 
  3274                              <1> 	; 07/08/2022
  3275                              <1> loc_show_next_cluster:
  3276                              <1> 	; 15/02/2016
  3277 00008D25 BB00000700          <1> 	mov	ebx, Cluster_Buffer ; 70000h (for current TRDOS 386 version)
  3278                              <1> 	; ESI = Logical DOS drv description table address
  3279 00008D2A E8CF360000          <1> 	call	read_cluster
  3280                              <1> 	;;jc	loc_file_rw_cmd_failed
  3281                              <1> 	;jc	loc_run_cmd_failed
  3282                              <1> 	; 07/08/2022
  3283 00008D2F 7305                <1> 	jnc	short loc_show_nc_rc_ok
  3284 00008D31 E99EF8FFFF          <1> 	jmp	loc_run_cmd_failed
  3285                              <1> loc_show_nc_rc_ok:
  3286 00008D36 31DB                <1> 	xor 	ebx, ebx
  3287                              <1> loc_show_next_byte:
  3288 00008D38 803D[64810100]00    <1> 	cmp	byte [Show_RowCount], 0
  3289 00008D3F 7512                <1> 	jne	short pass_show_wait_for_key
  3290 00008D41 30E4                <1> 	xor	ah, ah
  3291 00008D43 E8B081FFFF          <1> 	call	int16h
  3292 00008D48 3C1B                <1> 	cmp	al, 1Bh
  3293                              <1> 	;jne	short pass_exit_show
  3294                              <1> 	; 28/07/2022
  3295 00008D4A 7472                <1> 	je	short end_of_show_file
  3296                              <1> 
  3297                              <1> ;end_of_show_file:
  3298                              <1> ;pass_show_file:
  3299                              <1> ;	mov	esi, nextline
  3300                              <1> ;	call	print_msg
  3301                              <1> ;	jmp	loc_file_rw_restore_retn
  3302                              <1> 
  3303                              <1> pass_exit_show:
  3304 00008D4C C605[64810100]14    <1> 	mov	byte [Show_RowCount], 20
  3305                              <1> pass_show_wait_for_key:
  3306 00008D53 81C300000700        <1> 	add	ebx, Cluster_Buffer
  3307 00008D59 8A03                <1> 	mov	al, [ebx]
  3308 00008D5B 3C0D                <1> 	cmp	al, 0Dh
  3309                              <1>  	;jne	loc_show_check_tab_space
  3310                              <1> 	; 28/07/2022
  3311 00008D5D 740B                <1> 	je	short loc_show_dec_row_count
  3312 00008D5F E991000000          <1> 	jmp	loc_show_check_tab_space
  3313                              <1> 
  3314                              <1> 	; 07/08/2022
  3315                              <1> loc_show_next:
  3316                              <1> 	;and	bx, bx ; 65536 -> 0
  3317                              <1> 	; 28/07/2022
  3318 00008D64 21DB                <1> 	and	ebx, ebx
  3319 00008D66 75D0                <1> 	jnz	short loc_show_next_byte
  3320 00008D68 EBBB                <1> 	jmp     short loc_show_next_cluster
  3321                              <1> 
  3322                              <1> loc_show_dec_row_count:	; 28/07/2022
  3323 00008D6A FE0D[64810100]      <1> 	dec	byte [Show_RowCount]
  3324                              <1> pass_show_dec_rowcount:
  3325 00008D70 B307                <1> 	mov	bl, 7 ; (light gray character color, black background)
  3326 00008D72 8A3D[76770100]      <1> 	mov	bh, [ACTIVE_PAGE] ; [ptty]
  3327 00008D78 E8F494FFFF          <1> 	call	_write_tty
  3328                              <1> loc_show_check_eof:
  3329 00008D7D FF05[5C810100]      <1> 	inc	dword [Show_FilePointer]
  3330 00008D83 A1[5C810100]        <1> 	mov	eax, [Show_FilePointer]
  3331 00008D88 3B05[58810100]      <1> 	cmp	eax, [Show_FileSize]
  3332 00008D8E 732E                <1> 	jnb	short end_of_show_file
  3333 00008D90 66FF05[60810100]    <1> 	inc	word [Show_ClusterPointer]
  3334 00008D97 0FB71D[60810100]    <1> 	movzx	ebx, word [Show_ClusterPointer]
  3335                              <1> 
  3336                              <1> 	; 17/02/2016
  3337                              <1> 	; (sector boundary -9 bits- check, 512 = 0)
  3338 00008D9E 66F7C3FF01          <1>         test    bx, 1FFh ; 1 to 511
  3339 00008DA3 7593                <1> 	jnz	short loc_show_next_byte
  3340                              <1> 
  3341                              <1> 	; 16/02/2016
  3342 00008DA5 8B35[50810100]      <1> 	mov	esi, [Show_LDDDT]
  3343                              <1> 	;
  3344 00008DAB 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
  3345 00008DAF 771C                <1> 	ja	short loc_show_check_fat_cluster_size
  3346                              <1> 
  3347                              <1> 	; Singlix FS
  3348                              <1> 	; 1 sector, more... (cluster size = 1 sector)
  3349 00008DB1 A1[54810100]        <1> 	mov	eax, [Show_Cluster]
  3350 00008DB6 40                  <1> 	inc	eax
  3351 00008DB7 A3[54810100]        <1> 	mov	[Show_Cluster], eax
  3352                              <1> 
  3353                              <1> 	; 07/08/2022
  3354 00008DBC EBA6                <1> 	jmp	short loc_show_next
  3355                              <1> 
  3356                              <1> 	; 28/07/2022
  3357                              <1> end_of_show_file:
  3358                              <1> pass_show_file:
  3359 00008DBE BE[4B3A0100]        <1> 	mov	esi, nextline
  3360 00008DC3 E8E2DEFFFF          <1> 	call	print_msg
  3361 00008DC8 E9D7000000          <1> 	jmp	loc_file_rw_restore_retn
  3362                              <1> 	 
  3363                              <1> loc_show_check_fat_cluster_size:
  3364                              <1> 	; 17/02/2016
  3365 00008DCD 663B1D[62810100]    <1> 	cmp	bx, [Show_ClusterSize] ; cluster size in bytes
  3366                              <1>         ;jb	short loc_show_next_byte ; 28/07/2022
  3367                              <1> 	; 07/08/2022
  3368 00008DD4 7305                <1> 	jnb	short loc_show_file_cluster_ok
  3369 00008DD6 E95DFFFFFF          <1> 	jmp	loc_show_next_byte
  3370                              <1> 
  3371                              <1> loc_show_file_cluster_ok:
  3372 00008DDB 66C705[60810100]00- <1> 	mov	word [Show_ClusterPointer], 0
  3372 00008DE3 00                  <1>
  3373                              <1> 
  3374 00008DE4 A1[54810100]        <1> 	mov	eax, [Show_Cluster]
  3375                              <1> 	;mov	esi, [Show_LDDDT]
  3376                              <1> loc_show_get_next_cluster:
  3377 00008DE9 E819340000          <1> 	call	get_next_cluster
  3378                              <1> 	;;jc	loc_file_rw_cmd_failed
  3379                              <1> 	;jc	loc_run_cmd_failed
  3380                              <1> 	; 28/07/2022
  3381 00008DEE 733B                <1> 	jnc	short loc_show_update_ccluster
  3382 00008DF0 E9DFF7FFFF          <1> 	jmp	loc_run_cmd_failed
  3383                              <1> 
  3384                              <1> loc_show_check_tab_space:
  3385 00008DF5 3C09                <1> 	cmp	al, 09h
  3386                              <1> 	;jne	short pass_show_dec_rowcount ; 28/07/2022
  3387                              <1> 	; 07/08/2022
  3388 00008DF7 7405                <1> 	je	short loc_show_put_tab_space
  3389 00008DF9 E972FFFFFF          <1> 	jmp	pass_show_dec_rowcount
  3390                              <1> loc_show_put_tab_space:
  3391 00008DFE 8A3D[76770100]      <1> 	mov	bh, [ACTIVE_PAGE] ; [ptty]
  3392 00008E04 E80691FFFF          <1> 	call	get_cpos
  3393                              <1> 	; dl = cursor column
  3394 00008E09 80E207              <1> 	and	dl, 7 ; 18/02/2016
  3395                              <1> 	;shr	bh, 1 ; [ACTIVE_PAGE]
  3396 00008E0C 8A3D[76770100]      <1> 	mov	bh, [ACTIVE_PAGE]
  3397 00008E12 B307                <1> 	mov	bl, 7 ; color attribute
  3398                              <1> loc_show_put_space_chars:
  3399 00008E14 B020                <1> 	mov	al, 20h ; space
  3400                              <1> 	;mov	bh, [ACTIVE_PAGE] ; [ptty]
  3401                              <1> 	;mov	bl, 7 ; color attribute
  3402                              <1> 	;push	dx
  3403 00008E16 52                  <1> 	push	edx ; 29/12/2017
  3404 00008E17 E85594FFFF          <1> 	call	_write_tty
  3405 00008E1C 5A                  <1> 	pop	edx ; 29/12/2017
  3406                              <1> 	;pop	dx
  3407                              <1> 	; 18/02/2016
  3408 00008E1D 80FA07              <1> 	cmp	dl, 7
  3409                              <1> 	;jnb	short loc_show_check_eof ; 28/07/2022
  3410                              <1> 	; 07/08/2022
  3411 00008E20 7205                <1> 	jb	short loc_show_next_tab_space
  3412 00008E22 E956FFFFFF          <1> 	jmp	loc_show_check_eof
  3413                              <1> loc_show_next_tab_space:
  3414 00008E27 FEC2                <1> 	inc	dl
  3415 00008E29 EBE9                <1> 	jmp	short loc_show_put_space_chars
  3416                              <1> 
  3417                              <1> loc_show_update_ccluster:
  3418 00008E2B A3[54810100]        <1> 	mov	[Show_Cluster], eax
  3419 00008E30 E9F0FEFFFF          <1>         jmp     loc_show_next_cluster
  3420                              <1> 
  3421                              <1> check_filename:
  3422                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  3423                              <1> 	; 10/10/2016
  3424                              <1> 	; 15/02/2016 (TRDOS 386 = TRDOS v2.0)
  3425                              <1> 	; 07/08/2010 (FILE.ASM, 'proc_check_filename')
  3426                              <1> 	; 10/07/2010
  3427                              <1> 	; Derived from 'proc_check_filename'
  3428                              <1> 	; in the old TRDOS.ASM (09/02/2005).
  3429                              <1> 	;
  3430                              <1> 	; INPUT -> 
  3431                              <1> 	;	ESI = Dot File Name Location
  3432                              <1> 	; OUTPUT ->
  3433                              <1> 	;	cf = 1 -> error code in AL
  3434                              <1> 	;	     AL = ERR_INV_FILE_NAME (=26)
  3435                              <1> 	;		  Invalid file name chars   
  3436                              <1> 	;	cf = 0 -> valid file name
  3437                              <1> 	; 
  3438                              <1> 	; (EAX, ECX, EDI will be changed)
  3439                              <1> 
  3440                              <1> check_invalid_filename_chars:
  3441                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  3442                              <1> 	; 15/02/2016 (TRDOS 386 = TRDOS v2.0)
  3443                              <1> 	; 10/07/2010 (FILE.ASM, 'proc_check_invalid_filename_chars')
  3444                              <1> 	; 10/02/2010
  3445                              <1> 	; Derived from 'proc_check_invalid_filename_chars'
  3446                              <1> 	; in the old TRDOS.ASM (09/02/2005).
  3447                              <1> 	;
  3448                              <1> 	; INPUT -> 
  3449                              <1> 	;	ESI = ASCIIZ FileName
  3450                              <1> 	; OUTPUT ->
  3451                              <1> 	;	cf = 1 -> invalid
  3452                              <1> 	;	cf = 0 -> valid
  3453                              <1> 	; 
  3454                              <1> 	;(EAX, ECX, EDI will be changed)
  3455                              <1>   
  3456 00008E35 56                  <1> 	push	esi
  3457                              <1> 
  3458 00008E36 BF[C6300100]        <1>         mov     edi, invalid_fname_chars
  3459 00008E3B AC                  <1> 	lodsb
  3460                              <1> check_filename_next_char:
  3461 00008E3C B914000000          <1> 	mov	ecx, sizeInvFnChars
  3462 00008E41 BF[C6300100]        <1> 	mov	edi, invalid_fname_chars
  3463                              <1> loc_scan_invalid_filename_char:
  3464 00008E46 AE                  <1> 	scasb 
  3465 00008E47 741E                <1> 	je	short loc_invalid_filename_stc 
  3466 00008E49 E2FB                <1> 	loop	loc_scan_invalid_filename_char
  3467 00008E4B AC                  <1> 	lodsb
  3468 00008E4C 3C1F                <1> 	cmp	al, 1Fh  ; 20h and above 
  3469 00008E4E 77EC                <1> 	ja	short check_filename_next_char
  3470                              <1> 
  3471                              <1> check_filename_dot:
  3472 00008E50 8B3424              <1> 	mov	esi, [esp]
  3473                              <1> 
  3474 00008E53 B421                <1> 	mov	ah, 21h
  3475                              <1> 	;mov	ecx, 8
  3476                              <1> 	; 28/07/2022
  3477 00008E55 29C9                <1> 	sub	ecx, ecx
  3478 00008E57 B108                <1> 	mov	cl, 8
  3479                              <1> loc_check_filename_next_char:
  3480 00008E59 AC                  <1> 	lodsb
  3481 00008E5A 3C2E                <1> 	cmp	al, 2Eh
  3482 00008E5C 7511                <1> 	jne	short pass_check_fn_dot_check
  3483                              <1> loc_check_filename_ext_0:
  3484 00008E5E AC                  <1> 	lodsb
  3485 00008E5F 38E0                <1> 	cmp	al, ah ; 21h
  3486 00008E61 7205                <1> 	jb	short loc_invalid_filename
  3487 00008E63 3C2E                <1> 	cmp	al, 2Eh
  3488 00008E65 7519                <1> 	jne	short loc_check_filename_ext_1
  3489                              <1> 
  3490                              <1> loc_invalid_filename_stc:
  3491                              <1> loc_check_fn_stc_rtn:
  3492 00008E67 F9                  <1> 	stc
  3493                              <1> loc_invalid_filename:
  3494                              <1> 	; 10/10/2016 (0Bh -> 26)
  3495 00008E68 B81A000000          <1> 	mov	eax, ERR_INV_FILE_NAME ; (=26)
  3496                              <1> 	; Invalid file name chars
  3497                              <1> loc_check_fn_rtn:
  3498 00008E6D 5E                  <1> 	pop	esi
  3499 00008E6E C3                  <1> 	retn
  3500                              <1> 
  3501                              <1> pass_check_fn_dot_check:
  3502 00008E6F 38E0                <1> 	cmp	al, ah ; 21h
  3503 00008E71 7224                <1> 	jb	short loc_check_fn_clc_rtn
  3504 00008E73 E2E4                <1> 	loop	loc_check_filename_next_char
  3505 00008E75 AC                  <1> 	lodsb
  3506 00008E76 38E0                <1> 	cmp	al, ah ; 21h
  3507 00008E78 721D                <1> 	jb	short loc_check_fn_clc_rtn
  3508 00008E7A 3C2E                <1> 	cmp	al, 2Eh
  3509 00008E7C 75E9                <1> 	jne	short loc_check_fn_stc_rtn
  3510 00008E7E EBDE                <1> 	jmp	short loc_check_filename_ext_0
  3511                              <1> 
  3512                              <1> loc_check_filename_ext_1:
  3513 00008E80 AC                  <1> 	lodsb
  3514 00008E81 38E0                <1> 	cmp	al, ah ; 21h
  3515 00008E83 7212                <1> 	jb	short loc_check_fn_clc_rtn
  3516 00008E85 3C2E                <1> 	cmp	al, 2Eh
  3517 00008E87 74DE                <1> 	je	short loc_check_fn_stc_rtn
  3518 00008E89 AC                  <1> 	lodsb
  3519 00008E8A 38E0                <1> 	cmp	al, ah ; 21h
  3520 00008E8C 7209                <1> 	jb	short loc_check_fn_clc_rtn
  3521 00008E8E 3C2E                <1> 	cmp	al, 2Eh
  3522 00008E90 74D5                <1> 	je	short loc_check_fn_stc_rtn
  3523 00008E92 AC                  <1> 	lodsb
  3524 00008E93 38E0                <1> 	cmp	al, ah ; 21h
  3525 00008E95 73D0                <1> 	jnb	short loc_check_fn_stc_rtn
  3526                              <1> 
  3527                              <1> loc_check_fn_clc_rtn:
  3528 00008E97 5E                  <1> 	pop	esi
  3529 00008E98 F8                  <1> 	clc
  3530 00008E99 C3                  <1> 	retn
  3531                              <1> 
  3532                              <1> loc_print_deleted_message:
  3533 00008E9A BE[B3340100]        <1> 	mov	esi, Msg_Deleted
  3534 00008E9F E806DEFFFF          <1> 	call	print_msg
  3535                              <1> 
  3536                              <1> 	;clc
  3537                              <1> 
  3538                              <1> loc_file_rw_restore_retn:
  3539                              <1> 	; 15/02/2016 (TRDOS 386 = TRDOS v2.0)
  3540                              <1> 	; 28/02/2010 (CMD_INTR.ASM)
  3541                              <1> loc_file_rw_cmd_failed:
  3542 00008EA4 9C                  <1> 	pushf 
  3543 00008EA5 E892F7FFFF          <1> 	call	restore_cdir_after_cmd_fail	
  3544 00008EAA 9D                  <1> 	popf
  3545 00008EAB 720D                <1> 	jc	short loc_file_rw_check_write_fault
  3546 00008EAD C3                  <1> 	retn
  3547                              <1> 
  3548                              <1> loc_permission_denied:
  3549                              <1> 	; 27/02/2016
  3550 00008EAE BE[C0340100]        <1> 	mov	esi, Msg_Permission_Denied
  3551 00008EB3 E8F2DDFFFF          <1> 	call	print_msg
  3552 00008EB8 EBEA                <1> 	jmp	short loc_file_rw_restore_retn
  3553                              <1> 
  3554                              <1> loc_file_rw_check_write_fault:
  3555                              <1> 	;cmp	al, 1Dh ; Write Fault
  3556 00008EBA 3C12                <1>         cmp	al, 18 ; 05/11/2016
  3557                              <1> 	;jne	loc_run_cmd_failed_cmp_al
  3558                              <1> 	; 28/07/2022
  3559 00008EBC 7405                <1> 	je	short loc_file_rw_fault
  3560 00008EBE E916F7FFFF          <1> 	jmp	loc_run_cmd_failed_cmp_al
  3561                              <1> 
  3562                              <1> loc_file_rw_fault:
  3563 00008EC3 BE[A7320100]        <1> 	mov	esi, Msg_Not_Ready_Write_Err
  3564                              <1> 	;call	print_msg
  3565                              <1> 	;retn
  3566 00008EC8 E9DDDDFFFF          <1> 	jmp	print_msg
  3567                              <1> 
  3568                              <1> make_directory:
  3569                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  3570                              <1> 	; 21/02/2016 (TRDOS 386 = TRDOS v2.0)
  3571                              <1> 	; 12/03/2011 (CMD_INTR.ASM, 'cmp_cmd_mkdir')
  3572                              <1> 	; 14/08/2010
  3573                              <1> 	; 10/07/2010
  3574                              <1> 	; 29/11/2009
  3575                              <1> 	;
  3576                              <1> get_mkdir_fchar:
  3577                              <1> 	; esi = directory name
  3578 00008ECD 803E20              <1> 	cmp	byte [esi], 20h
  3579 00008ED0 7701                <1>         ja	short loc_mkdir_parse_path_name
  3580                              <1> 
  3581                              <1> loc_mkdir_nodirname_retn:
  3582 00008ED2 C3                  <1> 	retn
  3583                              <1> 
  3584                              <1> loc_mkdir_parse_path_name:
  3585 00008ED3 BF[AA800100]        <1> 	mov	edi, FindFile_Drv
  3586 00008ED8 E8771C0000          <1>         call    parse_path_name
  3587                              <1> 	;jc	loc_cmd_failed
  3588                              <1> 	; 28/07/2022
  3589 00008EDD 7305                <1> 	jnc	short loc_mkdir_check_dirname_exists
  3590                              <1> loc_mkdir_cmd_failed:
  3591 00008EDF E9C5F6FFFF          <1> 	jmp	loc_cmd_failed
  3592                              <1> 
  3593                              <1> loc_mkdir_check_dirname_exists:
  3594 00008EE4 BE[EC800100]        <1> 	mov	esi, FindFile_Name
  3595 00008EE9 803E20              <1> 	cmp	byte [esi], 20h
  3596                              <1> 	;jna	loc_cmd_failed
  3597                              <1> 	; 28/07/2022
  3598 00008EEC 76F1                <1> 	jna	short loc_mkdir_cmd_failed
  3599 00008EEE 8935[68810100]      <1> 	mov	[DelFile_FNPointer], esi
  3600 00008EF4 E83CFFFFFF          <1> 	call	check_filename
  3601 00008EF9 725B                <1> 	jc	short loc_mkdir_invalid_dir_name_chars
  3602                              <1> 
  3603                              <1> loc_mkdir_drv:
  3604 00008EFB 8A35[0A780100]      <1> 	mov	dh, [Current_Drv]
  3605 00008F01 8835[677F0100]      <1> 	mov	[RUN_CDRV], dh
  3606                              <1> 	
  3607 00008F07 8A15[AA800100]      <1> 	mov	dl, [FindFile_Drv]
  3608 00008F0D 38F2                <1> 	cmp	dl, dh
  3609 00008F0F 7409                <1> 	je	short loc_mkdir_change_directory
  3610                              <1> 
  3611 00008F11 E8CCE8FFFF          <1> 	call	change_current_drive
  3612                              <1> 	;jc	loc_file_rw_cmd_failed
  3613                              <1> 	; 28/07/2022
  3614 00008F16 7302                <1> 	jnc	short loc_mkdir_change_directory
  3615 00008F18 EB8A                <1> 	jmp	loc_file_rw_cmd_failed
  3616                              <1> 
  3617                              <1> loc_mkdir_change_directory:
  3618 00008F1A 803D[AB800100]20    <1> 	cmp	byte [FindFile_Directory], 20h
  3619 00008F21 7614                <1> 	jna	short loc_mkdir_find_directory
  3620                              <1> 
  3621 00008F23 FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  3622 00008F29 BE[AB800100]        <1> 	mov	esi, FindFile_Directory
  3623 00008F2E 30E4                <1> 	xor	ah, ah ; CD_COMMAND sign -> 0 
  3624 00008F30 E833160000          <1> 	call	change_current_directory
  3625 00008F35 7226                <1> 	jc	short loc_mkdir_check_error_code
  3626                              <1> 
  3627                              <1> ;loc_mkdir_change_prompt_dir_string:
  3628                              <1> 	;call	change_prompt_dir_string
  3629                              <1> 
  3630                              <1> loc_mkdir_find_directory:
  3631                              <1> 	;mov	esi, FindFile_Name
  3632 00008F37 8B35[68810100]      <1> 	mov	esi, [DelFile_FNPointer]
  3633                              <1> 	;xor	eax, eax
  3634 00008F3D 6631C0              <1> 	xor	ax, ax ; any name (dir, file, volume)
  3635 00008F40 E84BFBFFFF          <1> 	call	find_first_file
  3636 00008F45 7216                <1> 	jc	short loc_mkdir_check_error_code
  3637                              <1> 
  3638                              <1> loc_mkdir_directory_found:
  3639 00008F47 BE[0B340100]        <1> 	mov	esi, Msg_Name_Exists
  3640                              <1> loc_mkdir_inv_dname_chrs_msg:
  3641 00008F4C E859DDFFFF          <1> 	call	print_msg
  3642 00008F51 E94EFFFFFF          <1> 	jmp	loc_file_rw_restore_retn
  3643                              <1> 
  3644                              <1> loc_mkdir_invalid_dir_name_chars:
  3645 00008F56 BE[DE330100]        <1> 	mov	esi, Msg_invalid_name_chars
  3646                              <1> 	;call	print_msg
  3647                              <1>         ;jmp	loc_file_rw_restore_retn
  3648                              <1> 	; 28/07/2022
  3649 00008F5B EBEF                <1> 	jmp	short loc_mkdir_inv_dname_chrs_msg
  3650                              <1> 
  3651                              <1> loc_mkdir_check_error_code:
  3652 00008F5D 3C02                <1> 	cmp	al, 2
  3653                              <1> 	;je	short loc_mkdir_directory_not_found
  3654 00008F5F 7406                <1> 	je	short loc_mkdir_ask_for_yes_no
  3655 00008F61 F9                  <1> 	stc
  3656 00008F62 E93DFFFFFF          <1>         jmp     loc_file_rw_cmd_failed
  3657                              <1> 
  3658                              <1> loc_mkdir_directory_not_found:
  3659                              <1> loc_mkdir_ask_for_yes_no:
  3660 00008F67 BE[2C340100]        <1> 	mov	esi, Msg_DoYouWantMkdir
  3661 00008F6C E839DDFFFF          <1> 	call	print_msg
  3662 00008F71 8B35[68810100]      <1> 	mov	esi, [DelFile_FNPointer]
  3663 00008F77 E82EDDFFFF          <1> 	call	print_msg
  3664 00008F7C BE[4B340100]        <1> 	mov	esi, Msg_YesNo
  3665 00008F81 E824DDFFFF          <1> 	call	print_msg
  3666                              <1> 
  3667 00008F86 C605[55340100]20    <1> 	mov	byte [Y_N_nextline], 20h
  3668                              <1> 
  3669                              <1> loc_mkdir_ask_again:
  3670 00008F8D 30E4                <1> 	xor	ah, ah
  3671 00008F8F E8647FFFFF          <1> 	call	int16h
  3672 00008F94 3C1B                <1> 	cmp	al, 1Bh
  3673                              <1> 	;je	short loc_do_not_make_directory
  3674 00008F96 743B                <1> 	je	short loc_mkdir_y_n_escape
  3675 00008F98 24DF                <1> 	and	al, 0DFh ; y -> Y, n -> N
  3676 00008F9A 3C59                <1> 	cmp	al, 'Y' ; 'yes'
  3677 00008F9C 7404                <1> 	je	short loc_mkdir_yes_make_directory
  3678 00008F9E 3C4E                <1> 	cmp	al, 'N' ; 'no'
  3679 00008FA0 75EB                <1> 	jne	short loc_mkdir_ask_again
  3680                              <1> 
  3681                              <1> loc_do_not_make_directory:
  3682                              <1> loc_mkdir_yes_make_directory:
  3683 00008FA2 E830000000          <1> 	call	y_n_answer ; 29/12/2017
  3684                              <1> 	;cmp	al, 'Y' ; 'yes'
  3685                              <1> 	;cmc
  3686                              <1>         ;jnc	loc_file_rw_restore_retn
  3687 00008FA7 3C4E                <1> 	cmp	al, 'N' ; 'no'
  3688                              <1> 	;je	loc_file_rw_restore_retn
  3689                              <1> 	; 28/07/2022
  3690 00008FA9 7505                <1> 	jne	short loc_mkdir_call_make_sub_dir
  3691 00008FAB E9F4FEFFFF          <1> 	jmp	loc_file_rw_restore_retn		
  3692                              <1> 
  3693                              <1> loc_mkdir_call_make_sub_dir:
  3694 00008FB0 8B35[68810100]      <1> 	mov	esi, [DelFile_FNPointer]
  3695 00008FB6 B110                <1> 	mov	cl, 10h ; Directory attributes 
  3696 00008FB8 E88B1C0000          <1> 	call	make_sub_directory
  3697                              <1> loc_rename_file_ok: ; 06/03/2016
  3698                              <1>         ;jc	loc_file_rw_cmd_failed
  3699                              <1> 	; 28/07/2022
  3700 00008FBD 7305                <1> 	jnc	short move_source_file_to_dest_OK
  3701 00008FBF E9E0FEFFFF          <1> 	jmp	loc_file_rw_cmd_failed
  3702                              <1> move_source_file_to_dest_OK:
  3703 00008FC4 BE[59340100]        <1> 	mov	esi, Msg_OK
  3704 00008FC9 E8DCDCFFFF          <1> 	call	print_msg
  3705 00008FCE E9D1FEFFFF          <1> 	jmp	loc_file_rw_restore_retn
  3706                              <1> 
  3707                              <1> loc_mkdir_y_n_escape:
  3708 00008FD3 B04E                <1> 	mov	al, 'N' ; 'no'
  3709 00008FD5 EBCB                <1> 	jmp	short loc_do_not_make_directory
  3710                              <1> 
  3711                              <1> y_n_answer:
  3712                              <1> 	; 29/12/2017
  3713 00008FD7 A2[55340100]        <1> 	mov	[Y_N_nextline], al
  3714                              <1> 	;push	ax
  3715 00008FDC 50                  <1> 	push	eax
  3716 00008FDD BE[55340100]        <1> 	mov	esi, Y_N_nextline
  3717 00008FE2 E8C3DCFFFF          <1> 	call	print_msg
  3718 00008FE7 58                  <1> 	pop	eax
  3719                              <1> 	;pop	ax
  3720 00008FE8 C3                  <1> 	retn
  3721                              <1> 
  3722                              <1> delete_directory:
  3723                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  3724                              <1> 	; 29/12/2017
  3725                              <1> 	; 15/10/2016
  3726                              <1> 	; 01/03/2016, 06/03/2016
  3727                              <1> 	; 27/02/2016, 28/02/2016, 29/02/2016
  3728                              <1> 	; 26/02/2016 (TRDOS 386 = TRDOS v2.0)
  3729                              <1> 	; 16/10/2010 (CMD_INTR.ASM, 'cmp_cmd_rmdir')
  3730                              <1> 	; 05/06/2010
  3731                              <1> 	;
  3732                              <1> get_fchar:
  3733                              <1> 	; esi = directory name
  3734 00008FE9 803E20              <1> 	cmp	byte [esi], 20h
  3735 00008FEC 7701                <1>         ja	short loc_rmdir_parse_path_name
  3736                              <1> 
  3737                              <1> loc_rmdir_nodirname_retn:
  3738 00008FEE C3                  <1> 	retn
  3739                              <1> 
  3740                              <1> loc_rmdir_parse_path_name:
  3741 00008FEF BF[AA800100]        <1> 	mov	edi, FindFile_Drv
  3742 00008FF4 E85B1B0000          <1> 	call	parse_path_name
  3743                              <1> 	;jc	loc_cmd_failed
  3744                              <1> 	; 28/07/2022
  3745 00008FF9 7305                <1> 	jnc	short loc_rmdir_check_dirname_exists
  3746                              <1> lc_del_dir_failed:
  3747 00008FFB E9A9F5FFFF          <1> 	jmp	loc_cmd_failed
  3748                              <1> 
  3749                              <1> loc_rmdir_check_dirname_exists:
  3750 00009000 BE[EC800100]        <1> 	mov	esi, FindFile_Name
  3751 00009005 803E20              <1> 	cmp	byte [esi], 20h
  3752                              <1> 	;jna	loc_cmd_failed
  3753                              <1> 	; 28/07/2022
  3754 00009008 76F1                <1> 	jna	short lc_del_dir_failed 
  3755 0000900A 8935[68810100]      <1> 	mov	[DelFile_FNPointer], esi 
  3756                              <1> 
  3757                              <1> loc_rmdir_drv:
  3758 00009010 8A35[0A780100]      <1> 	mov	dh, [Current_Drv]
  3759 00009016 8835[677F0100]      <1> 	mov	[RUN_CDRV], dh
  3760                              <1> 
  3761 0000901C 8A15[AA800100]      <1> 	mov	dl, [FindFile_Drv]
  3762 00009022 38F2                <1> 	cmp	dl, dh
  3763 00009024 7407                <1> 	je	short loc_rmdir_change_directory
  3764                              <1> 
  3765 00009026 E8B7E7FFFF          <1> 	call	change_current_drive
  3766                              <1> 	;jc	loc_file_rw_cmd_failed
  3767                              <1> 	; 28/07/2022
  3768                              <1> 	;jnc	short loc_rmdir_change_directory
  3769                              <1> 	;jmp	loc_file_rw_cmd_failed
  3770 0000902B 7233                <1> 	jc	short loc_rmdir_chdrv_failed
  3771                              <1> 
  3772                              <1> loc_rmdir_change_directory:
  3773 0000902D 803D[AB800100]20    <1> 	cmp	byte [FindFile_Directory], 20h
  3774 00009034 7614                <1> 	jna	short loc_rmdir_find_directory
  3775                              <1> 
  3776 00009036 FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  3777 0000903C BE[AB800100]        <1> 	mov	esi, FindFile_Directory
  3778 00009041 30E4                <1> 	xor	ah, ah ; CD_COMMAND sign -> 0 
  3779 00009043 E820150000          <1> 	call	change_current_directory
  3780 00009048 7211                <1> 	jc	short loc_rmdir_check_error_code
  3781                              <1> 
  3782                              <1> ;loc_rmdir_change_prompt_dir_string:
  3783                              <1> 	;call	change_prompt_dir_string
  3784                              <1> 
  3785                              <1> loc_rmdir_find_directory:
  3786                              <1> 	;mov	esi, FindFile_Name
  3787 0000904A 8B35[68810100]      <1> 	mov	esi, [DelFile_FNPointer]
  3788 00009050 66B81008            <1> 	mov	ax, 0810h ; Only directories
  3789 00009054 E837FAFFFF          <1> 	call	find_first_file
  3790 00009059 730A                <1> 	jnc	short loc_rmdir_ambgfn_check
  3791                              <1> 
  3792                              <1> loc_rmdir_check_error_code:
  3793 0000905B 3C02                <1> 	cmp	al, 2
  3794 0000905D 740B                <1> 	je	short loc_rmdir_directory_not_found
  3795 0000905F F9                  <1> 	stc
  3796                              <1> loc_rmdir_chdrv_failed:
  3797 00009060 E93FFEFFFF          <1> 	jmp	loc_file_rw_cmd_failed
  3798                              <1> 
  3799                              <1> loc_rmdir_ambgfn_check:
  3800 00009065 6621D2              <1> 	and	dx, dx ; Ambiguous filename chars used sign (DX>0)
  3801 00009068 740F                <1> 	jz	short loc_rmdir_directory_found
  3802                              <1> 
  3803                              <1> loc_rmdir_directory_not_found:
  3804 0000906A BE[C9320100]        <1> 	mov	esi, Msg_Dir_Not_Found
  3805 0000906F E836DCFFFF          <1> 	call	print_msg
  3806                              <1> 
  3807 00009074 E92BFEFFFF          <1> 	jmp	loc_file_rw_restore_retn
  3808                              <1> 
  3809                              <1> loc_rmdir_directory_found:
  3810 00009079 80E307              <1> 	and	bl, 07h ; Attributes
  3811                              <1> 	;jnz	loc_permission_denied
  3812                              <1> 	; 28/07/2022
  3813 0000907C 7405                <1> 	jz	short loc_rmdir_save_lnel
  3814 0000907E E92BFEFFFF          <1> 	jmp	loc_permission_denied	
  3815                              <1> 
  3816                              <1> loc_rmdir_save_lnel: ; 28/02/2016
  3817                              <1>        ;mov	bh, [LongName_EntryLength]
  3818 00009083 883D[72810100]      <1> 	mov	[DelFile_LNEL], bh ; Long name entry length (if > 0)
  3819                              <1> 	; edi = Directory Entry Offset (DirBuff)
  3820                              <1> 	; esi = Directory Entry (FFF Structure)
  3821                              <1> 	;mov	[DelFile_DirEntryAddr], edi ; not required
  3822                              <1> 	;mov	ax, [edi+20] ; First Cluster High Word
  3823                              <1>         ;shl	eax, 16
  3824                              <1> 	;mov	ax, [edi+26] ; First Cluster Low Word
  3825                              <1> 	; ROOT Dir First Cluster = 0
  3826                              <1>         ;cmp	eax, 2
  3827                              <1> 	;jb	loc_update_direntry_1
  3828                              <1> 
  3829                              <1> pass_rmdir_fc_check:
  3830 00009089 57                  <1> 	push	edi ; * (29/02/2016)
  3831                              <1> 
  3832 0000908A BE[5F340100]        <1> 	mov	esi, Msg_DoYouWantRmDir
  3833 0000908F E816DCFFFF          <1> 	call	print_msg
  3834 00009094 8B35[68810100]      <1> 	mov	esi, [DelFile_FNPointer]
  3835 0000909A E80BDCFFFF          <1> 	call	print_msg
  3836 0000909F BE[4B340100]        <1> 	mov	esi, Msg_YesNo
  3837 000090A4 E801DCFFFF          <1> 	call	print_msg
  3838                              <1> 
  3839                              <1> loc_rmdir_ask_again:
  3840 000090A9 30E4                <1> 	xor	ah, ah
  3841 000090AB E8487EFFFF          <1> 	call	int16h
  3842 000090B0 3C1B                <1> 	cmp	al, 1Bh
  3843                              <1> 	;je	short loc_do_not_delete_directory
  3844 000090B2 742F                <1>         je	short loc_rmdir_y_n_escape ; 06/03/2016
  3845 000090B4 24DF                <1> 	and	al, 0DFh
  3846 000090B6 A2[55340100]        <1> 	mov	[Y_N_nextline], al
  3847 000090BB 3C59                <1> 	cmp	al, 'Y'
  3848 000090BD 7404                <1> 	je	short loc_rmdir_yes_delete_directory
  3849 000090BF 3C4E                <1> 	cmp	al, 'N'
  3850 000090C1 75E6                <1> 	jne	short loc_rmdir_ask_again
  3851                              <1> 
  3852                              <1> loc_do_not_delete_directory:
  3853                              <1> loc_rmdir_yes_delete_directory:
  3854 000090C3 E80FFFFFFF          <1> 	call	y_n_answer ; 29/12/2017
  3855 000090C8 5F                  <1> 	pop	edi ; * (29/02/2016)
  3856                              <1> 	;cmp	al, 'Y' ; 'yes'
  3857                              <1> 	;cmc
  3858                              <1>         ;jnc	loc_file_rw_restore_retn
  3859 000090C9 3C4E                <1> 	cmp	al, 'N' ; 'no'
  3860                              <1> 	;je	loc_file_rw_restore_retn
  3861                              <1> 	; 28/07/2022
  3862                              <1> 	;jne	short loc_delete_sub_dir
  3863                              <1> 	;jmp	loc_file_rw_restore_retn
  3864 000090CB 7411                <1> 	je	short loc_rmdir_rw_restore_retn
  3865                              <1> 
  3866                              <1> loc_delete_sub_dir:
  3867                              <1> 	; 29/12/2017
  3868 000090CD E85E000000          <1> 	call	delete_sub_directory
  3869 000090D2 7213                <1> 	jc	short loc_rmdir_cmd_failed
  3870                              <1> 
  3871                              <1> loc_rmdir_ok:
  3872 000090D4 BE[59340100]        <1> 	mov	esi, Msg_OK
  3873 000090D9 E8CCDBFFFF          <1> 	call	print_msg
  3874                              <1> loc_rmdir_rw_restore_retn: ; 28/07/2022
  3875 000090DE E9C1FDFFFF          <1> 	jmp	loc_file_rw_restore_retn
  3876                              <1> 
  3877                              <1> loc_rmdir_y_n_escape:
  3878 000090E3 B04E                <1> 	mov	al, 'N' ; 'no'
  3879 000090E5 EBDC                <1>         jmp     loc_do_not_delete_directory
  3880                              <1> 
  3881                              <1> loc_rmdir_cmd_failed:
  3882                              <1> 	; 29/12/2017
  3883 000090E7 09C0                <1> 	or	eax, eax ; EAX = 0 -> Directory not empty!
  3884 000090E9 7423                <1> 	jz	short loc_rmdir_directory_not_empty
  3885                              <1> 
  3886                              <1> 	; EAX > 0 -> Error code in AL (or AX or EAX)
  3887                              <1> 
  3888 000090EB 833D[267F0100]01    <1> 	cmp	dword [FAT_ClusterCounter], 1
  3889                              <1> 	;jb	loc_file_rw_cmd_failed
  3890                              <1> 	; 28/07/2022
  3891 000090F2 7305                <1> 	jnb	short loc_rmdir_failed
  3892 000090F4 E9ABFDFFFF          <1> 	jmp	loc_file_rw_cmd_failed
  3893                              <1> 	
  3894                              <1> loc_rmdir_failed:
  3895 000090F9 F9                  <1> 	stc
  3896                              <1> loc_rmdir_cmd_return:
  3897                              <1> 	; 01/03/2016
  3898 000090FA 9C                  <1> 	pushf
  3899                              <1> 	; ESI = Logical DOS Drive Description Table address	
  3900 000090FB 66BB00FF            <1> 	mov	bx, 0FF00h ; BH = FFh -> use ESI for Drive parameters
  3901                              <1> 	           ; BL = 0 -> Recalculate free cluster count
  3902 000090FF 50                  <1> 	push	eax
  3903 00009100 E805370000          <1> 	call	calculate_fat_freespace	
  3904 00009105 58                  <1> 	pop	eax
  3905 00009106 9D                  <1> 	popf
  3906                              <1> 	;jc	loc_file_rw_cmd_failed
  3907                              <1> 	;jmp	loc_file_rw_restore_retn
  3908                              <1> 	; 28/07/2022
  3909 00009107 73D5                <1> 	jnc	short loc_rmdir_rw_restore_retn
  3910 00009109 E996FDFFFF          <1> 	jmp	loc_file_rw_cmd_failed
  3911                              <1> 
  3912                              <1> loc_rmdir_directory_not_empty:
  3913 0000910E BE[80340100]        <1> 	mov	esi, Msg_Dir_Not_Empty
  3914 00009113 E892DBFFFF          <1> 	call	print_msg
  3915                              <1> 	; 01/03/2016
  3916 00009118 A1[267F0100]        <1> 	mov	eax, [FAT_ClusterCounter]
  3917 0000911D 09C0                <1> 	or	eax, eax ; 0 ?
  3918                              <1> 	;jz	loc_file_rw_restore_retn
  3919                              <1> 	; 28/07/2022
  3920 0000911F 74BD                <1> 	jz	short loc_rmdir_rw_restore_retn	
  3921                              <1> 
  3922                              <1> 	; ESI = Logical DOS Drive Description Table address	
  3923 00009121 66BB01FF            <1> 	mov	bx, 0FF01h ; BH = FFh -> use ESI for Drive parameters
  3924                              <1> 	           ; BL = 1 -> add free clusters
  3925 00009125 E8E0360000          <1> 	call	calculate_fat_freespace
  3926 0000912A 09C9                <1> 	or	ecx, ecx
  3927                              <1> 	;jz	loc_file_rw_restore_retn ; ecx = 0 -> OK
  3928                              <1> 	;; ecx > 0 -> Error (Recalculation is needed)
  3929                              <1> 	;jmp	short loc_rmdir_cmd_return
  3930                              <1> 	; 28/07/2022
  3931 0000912C 75CC                <1> 	jnz	short loc_rmdir_cmd_return
  3932 0000912E EBAE                <1> 	jmp	short loc_rmdir_rw_restore_retn
  3933                              <1> 	;jmp	loc_file_rw_restore_retn
  3934                              <1> 
  3935                              <1> 
  3936                              <1> delete_sub_directory:
  3937                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  3938                              <1> 	; 29/12/2017 
  3939                              <1> 	; (moved here from 'delete_directory' for 'sysrmdir' )
  3940                              <1> 
  3941                              <1> 	; EDI = Directory buffer entry offset/address
  3942                              <1> 
  3943                              <1> loc_rmdir_delete_short_name_check_dir_empty:
  3944 00009130 668B4714            <1> 	mov	ax, [edi+20] ; First Cluster High Word
  3945 00009134 C1E010              <1>         shl	eax, 16
  3946 00009137 668B471A            <1> 	mov	ax, [edi+26] ; First Cluster Low Word
  3947                              <1> 
  3948                              <1> 	;mov 	[DelFile_FCluster], eax
  3949                              <1> 
  3950                              <1> 	;;mov	bx, [DirBuff_EntryCounter]
  3951                              <1> 	;mov	bx, [FindFile_DirEntryNumber] ; 27/02/2016
  3952                              <1> 	;mov	[DelFile_EntryCounter], bx
  3953                              <1> 
  3954 0000913B 29DB                <1>     	sub	ebx, ebx
  3955                              <1> 	; 29/12/2017
  3956 0000913D 891D[267F0100]      <1> 	mov	[FAT_ClusterCounter], ebx ; 0 ; Reset
  3957                              <1> 
  3958 00009143 8A3D[AA800100]      <1> 	mov	bh, [FindFile_Drv]
  3959 00009149 BE00010900          <1> 	mov	esi, Logical_DOSDisks
  3960 0000914E 01DE                <1> 	add	esi, ebx
  3961                              <1> 
  3962 00009150 66817F0CA101        <1> 	cmp	word [edi+DirEntry_NTRes], 01A1h
  3963 00009156 745A                <1> 	je	short loc_rmdir_check_fs_directory
  3964                              <1> 
  3965                              <1> 	;cmp	byte [esi+LD_FATType], 1
  3966                              <1> 	;jb	short loc_rmdir_get__last_cluster_0
  3967                              <1> 
  3968                              <1> 	; 29/12/2017
  3969 00009158 83F802              <1> 	cmp	eax, 2
  3970 0000915B 7306                <1> 	jnb	short loc_rmdir_get_last_cluster_1
  3971                              <1> 	; eax < 2
  3972                              <1> loc_rmdir_get_last_cluster_0:
  3973                              <1> 	;mov	eax, ERR_INV_FORMAT ; invalid format!
  3974 0000915D B813000000          <1> 	mov	eax, ERR_NOT_DIR ; not a valid directory!
  3975                              <1> 	;stc
  3976 00009162 C3                  <1> 	retn
  3977                              <1> 
  3978                              <1> loc_rmdir_get_last_cluster_1:
  3979 00009163 807E0303            <1> 	cmp	byte [esi+LD_FATType], 3 ; FAT32
  3980 00009167 750C                <1> 	jne	short loc_rmdir_get_last_cluster_2
  3981                              <1> 
  3982                              <1> 	; is it root directory ?
  3983 00009169 3B4632              <1> 	cmp	eax, [esi+LD_BPB+BPB_RootClus]
  3984 0000916C 7507                <1> 	jne	short loc_rmdir_get_last_cluster_2
  3985                              <1> 
  3986                              <1> 	; root directory can not be deleted !!
  3987                              <1> loc_rmdir_permission_denied:
  3988 0000916E B80B000000          <1> 	mov	eax, ERR_PERM_DENIED ; permission denied!
  3989 00009173 F9                  <1> 	stc
  3990 00009174 C3                  <1> 	retn		
  3991                              <1> 
  3992                              <1> loc_rmdir_get_last_cluster_2:
  3993                              <1> 	; 29/12/2017
  3994 00009175 A3[6C810100]        <1> 	mov 	[DelFile_FCluster], eax
  3995                              <1> 	
  3996                              <1> 	;mov	dx, [DirBuff_EntryCounter]
  3997 0000917A 668B15[24810100]    <1> 	mov	dx, [FindFile_DirEntryNumber] ; 27/02/2016
  3998 00009181 668915[70810100]    <1> 	mov	[DelFile_EntryCounter], dx
  3999                              <1> 	
  4000 00009188 8B15[367F0100]      <1> 	mov	edx, [DirBuff_Cluster]
  4001 0000918E 8915[9C810100]      <1> 	mov	[RmDir_ParentDirCluster], edx
  4002                              <1> 
  4003 00009194 893D[98810100]      <1> 	mov	[RmDir_DirEntryOffset], edi
  4004                              <1> 
  4005                              <1> 	; 01/03/2016
  4006                              <1> 	;mov	dword [FAT_ClusterCounter], 0 ; Reset
  4007                              <1> 
  4008                              <1> loc_rmdir_get_last_cluster_3:
  4009 0000919A E8E9370000          <1> 	call	get_last_cluster
  4010                              <1>         ;jc	loc_rmdir_cmd_failed
  4011 0000919F 721E                <1> 	jc	short loc_delete_sub_dir_retn ; 29/12/2017
  4012                              <1> 	
  4013 000091A1 3B05[6C810100]      <1> 	cmp	eax, [DelFile_FCluster]
  4014 000091A7 7517                <1> 	jne	short loc_rmdir_multi_dir_clusters
  4015                              <1> 
  4016 000091A9 C605[97810100]00    <1> 	mov	byte [RmDir_MultiClusters], 0
  4017 000091B0 EB15                <1> 	jmp	short pass_rmdir_multi_dir_clusters
  4018                              <1> 
  4019                              <1> loc_rmdir_check_fs_directory:
  4020                              <1> 	; 29/12/2017
  4021 000091B2 807E04A1            <1> 	cmp	byte [esi+LD_FSType], 0A1h
  4022 000091B6 75B6                <1> 	jne	short loc_rmdir_permission_denied
  4023                              <1> 
  4024                              <1> loc_rmdir_delete_fs_directory:
  4025 000091B8 E8D1120000          <1> 	call	delete_fs_directory
  4026                              <1> 	;jnc	loc_print_deleted_message
  4027 000091BD 7300                <1> 	jnc	short loc_delete_sub_dir_retn ; 29/12/2017
  4028                              <1> 
  4029                              <1> 	; EAX=0 -> Directory not empty !
  4030                              <1> 	; EAX>0 -> Disk r/w error or another (misc) error
  4031                              <1> 	
  4032                              <1> 	;or	eax, eax
  4033                              <1> 	;jz	loc_rmdir_directory_not_empty_2         
  4034                              <1> 	;;stc
  4035                              <1> 	;;jmp	loc_file_rw_cmd_failed
  4036                              <1> 	
  4037                              <1> loc_delete_sub_dir_retn:
  4038 000091BF C3                  <1> 	retn
  4039                              <1>  
  4040                              <1> loc_rmdir_multi_dir_clusters:
  4041 000091C0 C605[97810100]01    <1> 	mov	byte [RmDir_MultiClusters], 1
  4042                              <1> 
  4043                              <1> pass_rmdir_multi_dir_clusters:
  4044 000091C7 A3[A0810100]        <1> 	mov 	[RmDir_DirLastCluster], eax
  4045 000091CC 890D[A4810100]      <1> 	mov	[RmDir_PreviousCluster], ecx
  4046                              <1> 
  4047                              <1> loc_rmdir_load_fat_sub_directory:
  4048 000091D2 E8EC310000          <1> 	call	load_FAT_sub_directory
  4049                              <1> 	;jc	loc_rmdir_cmd_failed
  4050 000091D7 72E6                <1> 	jc	short loc_delete_sub_dir_retn
  4051                              <1> 
  4052                              <1> loc_rmdir_find_last_dir_entry:
  4053 000091D9 56                  <1> 	push	esi
  4054 000091DA BE[8E800100]        <1> 	mov	esi, Dir_File_Name
  4055 000091DF C6062A              <1> 	mov	byte [esi], '*'
  4056 000091E2 C646082A            <1> 	mov	byte [esi+8], '*'
  4057 000091E6 31DB                <1> 	xor	ebx, ebx ; Entry offset  = 0
  4058                              <1> loc_rmdir_find_last_dir_entry_next:
  4059                              <1> 	;mov	ax, 0800h ; Except volume/long names
  4060                              <1> 	;xor	cx, cx ; 0 = Find a valid file or dir name
  4061                              <1> 	; 28/07/2022
  4062 000091E8 31C0                <1> 	xor	eax, eax
  4063 000091EA B408                <1> 	mov	ah, 8
  4064                              <1> 	; eax = 0800h
  4065 000091EC 31C9                <1> 	xor	ecx, ecx ; 0
  4066 000091EE E8C6160000          <1> 	call	find_directory_entry
  4067 000091F3 7225                <1> 	jc	short loc_rmdir_empty_dir_cluster
  4068 000091F5 83FB01              <1> 	cmp	ebx, 1
  4069 000091F8 771B                <1> 	ja	short loc_rmdir_directory_not_empty_1
  4070                              <1> loc_rmdir_dot_entry_check:
  4071 000091FA 80FD2E              <1> 	cmp	ch, '.' ; The first char of the dir entry
  4072 000091FD 7516                <1> 	jne	short loc_rmdir_directory_not_empty_1
  4073 000091FF 08DB                <1> 	or	bl, bl
  4074 00009201 7506                <1> 	jnz	short loc_rmdir_dotdot_entry_check
  4075 00009203 807F0120            <1> 	cmp	byte [edi+1], 20h
  4076 00009207 EB06                <1> 	jmp	short pass_rmdir_dot_entry_check
  4077                              <1> 
  4078                              <1> loc_rmdir_dotdot_entry_check:
  4079 00009209 66817F012E20        <1> 	cmp	word [edi+1], '. '
  4080                              <1> pass_rmdir_dot_entry_check:	
  4081 0000920F 7504                <1> 	jne	short loc_rmdir_directory_not_empty_1 
  4082 00009211 FEC3                <1> 	inc	bl
  4083 00009213 EBD3                <1> 	jmp	short loc_rmdir_find_last_dir_entry_next 
  4084                              <1> 
  4085                              <1> loc_rmdir_directory_not_empty_1:
  4086 00009215 58                  <1> 	pop	eax ; pushed esi 
  4087 00009216 31C0                <1> 	xor	eax, eax ; 0
  4088                              <1> loc_rmdir_directory_not_empty_2:
  4089                              <1> loc_delete_sub_dir_stc_retn:
  4090 00009218 F9                  <1> 	stc
  4091 00009219 C3                  <1> 	retn
  4092                              <1> 
  4093                              <1> loc_rmdir_empty_dir_cluster:
  4094 0000921A 5E                  <1> 	pop	esi
  4095                              <1> 
  4096                              <1> loc_rmdir_set_prev_cluster_dir_last_cluster:
  4097 0000921B 803D[97810100]00    <1> 	cmp	byte [RmDir_MultiClusters], 0
  4098 00009222 7613                <1> 	jna	short loc_rmdir_unlink_dir_last_cluster
  4099                              <1> 
  4100 00009224 A1[A4810100]        <1> 	mov	eax, [RmDir_PreviousCluster]
  4101                              <1> 	;xor	ecx, ecx
  4102 00009229 49                  <1> 	dec	ecx ; FFFFFFFFh
  4103 0000922A E8C7320000          <1> 	call	update_cluster
  4104 0000922F 7306                <1> 	jnc	short loc_rmdir_unlink_dir_last_cluster
  4105                              <1> 
  4106                              <1> 	; 01/03/2016
  4107                              <1> 	;cmp	eax, 1  ; eax = 0 -> end of cluster chain
  4108                              <1> 	;cmc 
  4109                              <1> 	;jc	short loc_rmdir_cmd_failed
  4110                              <1> 	;jmp	short loc_rmdir_save_fat_buffer
  4111                              <1> 	; 29/12/2017 
  4112 00009231 21C0                <1> 	and	eax, eax
  4113 00009233 75E3                <1> 	jnz	short loc_delete_sub_dir_stc_retn
  4114 00009235 EB12                <1> 	jmp	short loc_rmdir_save_fat_buffer	
  4115                              <1> 
  4116                              <1> loc_rmdir_unlink_dir_last_cluster:
  4117 00009237 A1[A0810100]        <1> 	mov	eax, [RmDir_DirLastCluster]
  4118 0000923C 31C9                <1> 	xor	ecx, ecx ; 0
  4119 0000923E E8B3320000          <1> 	call	update_cluster
  4120 00009243 7327                <1> 	jnc	short loc_rmdir_unlink_stc_retn_0Bh
  4121                              <1> 	; Because of it is the last cluster
  4122                              <1> 	; 'update_cluster' must return with eocc error 
  4123 00009245 09C0                <1> 	or	eax, eax
  4124                              <1> 	;jz	short loc_rmdir_save_fat_buffer ; eocc	
  4125                              <1> 	;stc
  4126                              <1>         ;jmp	short loc_rmdir_cmd_failed
  4127                              <1> 	; 29/12/2017
  4128 00009247 75CF                <1> 	jnz	short loc_delete_sub_dir_stc_retn
  4129                              <1> 	
  4130                              <1> loc_rmdir_save_fat_buffer:
  4131 00009249 803D[1E7F0100]02    <1> 	cmp	byte [FAT_BuffValidData], 2
  4132 00009250 7527                <1> 	jne	short loc_rmdir_calculate_FAT_freespace
  4133 00009252 E822350000          <1> 	call	save_fat_buffer
  4134                              <1> 	;jc	short loc_rmdir_cmd_failed
  4135                              <1> 	; 29/12/2017
  4136 00009257 7219                <1> 	jc	short loc_rmdir_unlink_error_retn
  4137                              <1> 
  4138                              <1> 	; 01/03/2016
  4139 00009259 803D[97810100]00    <1> 	cmp	byte [RmDir_MultiClusters], 0
  4140 00009260 7617                <1> 	jna	short loc_rmdir_calculate_FAT_freespace
  4141                              <1> 
  4142 00009262 A1[6C810100]        <1> 	mov	eax, [DelFile_FCluster]
  4143 00009267 E92EFFFFFF          <1>         jmp     loc_rmdir_get_last_cluster_3
  4144                              <1> 
  4145                              <1> loc_rmdir_unlink_stc_retn_0Bh:
  4146                              <1> 	; 15/10/2016 (0Bh -> 28)
  4147 0000926C B81C000000          <1> 	mov	eax, ERR_INV_FORMAT ; 28 = Invalid format
  4148                              <1> loc_rmdir_unlink_stc_retn:
  4149 00009271 F9                  <1> 	stc
  4150                              <1> loc_rmdir_unlink_error_retn:
  4151 00009272 C3                  <1> 	retn
  4152                              <1> 
  4153                              <1> loc_rmdir_delete_short_name_invalid_data:
  4154                              <1> 	;mov	eax, 29 ; Invalid data (15/10/2016)
  4155                              <1> 	; 28/07/2022
  4156 00009273 29C0                <1> 	sub	eax, eax
  4157 00009275 B01D                <1> 	mov	al, 29
  4158                              <1> 	;stc
  4159                              <1>         ;jmp	loc_rmdir_cmd_failed
  4160                              <1> 	; 29/12/2017
  4161 00009277 EBF8                <1> 	jmp	short loc_rmdir_unlink_stc_retn
  4162                              <1> 
  4163                              <1> loc_rmdir_calculate_FAT_freespace:
  4164                              <1> 	;mov	eax, [FAT_ClusterCounter]
  4165                              <1> 	; 29/12/2017
  4166 00009279 29C0                <1> 	sub	eax, eax ; 0
  4167 0000927B 8705[267F0100]      <1> 	xchg	eax, [FAT_ClusterCounter]
  4168                              <1> 	;
  4169 00009281 66BB01FF            <1> 	mov	bx, 0FF01h
  4170                              <1> 	; BL = 1 -> Add EAX to free space count
  4171                              <1> 	; BH = FFh ->
  4172                              <1> 	; ESI = Logical DOS Drive Description Table address
  4173 00009285 E880350000          <1> 	call	calculate_fat_freespace
  4174                              <1> 
  4175 0000928A 21C9                <1> 	and	ecx, ecx ; ecx = 0 -> valid free sector count
  4176 0000928C 7409                <1> 	jz 	short loc_rmdir_delete_short_name_continue
  4177                              <1> 
  4178                              <1> loc_rmdir_recalculate_FAT_freespace:
  4179 0000928E 66BB00FF            <1>         mov     bx, 0FF00h ; BL = 0 -> Recalculate free space
  4180 00009292 E873350000          <1> 	call	calculate_fat_freespace
  4181                              <1> 	          
  4182                              <1> loc_rmdir_delete_short_name_continue:
  4183 00009297 A1[9C810100]        <1> 	mov	eax, [RmDir_ParentDirCluster]
  4184 0000929C 83F802              <1> 	cmp	eax, 2
  4185 0000929F 7309                <1> 	jnb	short loc_rmdir_del_short_name_load_sub_dir
  4186 000092A1 E89F300000          <1> 	call	load_FAT_root_directory
  4187                              <1> 	;jc	loc_file_rw_cmd_failed
  4188                              <1> 	; 29/12/2017
  4189 000092A6 72CA                <1> 	jc	short loc_rmdir_unlink_error_retn
  4190 000092A8 EB07                <1> 	jmp	short loc_rmdir_del_short_name_ld_chk_fclust
  4191                              <1> 
  4192                              <1> loc_rmdir_del_short_name_load_sub_dir:	
  4193 000092AA E814310000          <1> 	call	load_FAT_sub_directory
  4194                              <1> 	;jc	loc_file_rw_cmd_failed
  4195                              <1> 	; 29/12/2017
  4196 000092AF 72C1                <1> 	jc	short loc_rmdir_unlink_error_retn
  4197                              <1> 
  4198                              <1> loc_rmdir_del_short_name_ld_chk_fclust:
  4199 000092B1 0FB73D[98810100]    <1> 	movzx	edi, word [RmDir_DirEntryOffset]
  4200 000092B8 81C700000800        <1> 	add	edi, Directory_Buffer
  4201                              <1> 
  4202 000092BE 668B4714            <1> 	mov	ax, [edi+20] ; First Cluster High Word
  4203 000092C2 C1E010              <1> 	shl	eax, 16
  4204 000092C5 668B471A            <1> 	mov	ax, [edi+26] ; First Cluster Low Word
  4205                              <1>         ; Not necessary... 
  4206 000092C9 3B05[6C810100]      <1> 	cmp	eax, [DelFile_FCluster]
  4207 000092CF 75A2                <1> 	jne	short loc_rmdir_delete_short_name_invalid_data
  4208                              <1> 	;
  4209 000092D1 C607E5              <1> 	mov	byte [edi], 0E5h ; 'Deleted' sign
  4210                              <1> 	; 27/02/2016
  4211                              <1> 	; TRDOS v1 has a bug here! it does not set
  4212                              <1> 	; 'DirBuff_ValidData' to 2; as result of this bug,
  4213                              <1> 	; 'save_directory_buffer' would not save the change ! 
  4214 000092D4 C605[317F0100]02    <1>   	mov	byte [DirBuff_ValidData], 2 ; change sign
  4215                              <1> 	;
  4216 000092DB E8B01C0000          <1> 	call	save_directory_buffer
  4217                              <1> 	;jc	loc_file_rw_cmd_failed
  4218                              <1> 	; 29/12/2017
  4219 000092E0 7290                <1> 	jc	short loc_rmdir_unlink_error_retn
  4220                              <1> 
  4221                              <1> loc_rmdir_del_long_name:
  4222 000092E2 0FB615[72810100]    <1> 	movzx	edx, byte [DelFile_LNEL]
  4223 000092E9 08D2                <1> 	or	dl, dl
  4224 000092EB 7410                <1> 	jz	short loc_rmdir_update_parent_dir_lmdt
  4225                              <1>              
  4226 000092ED 0FB705[70810100]    <1> 	movzx	eax, word [DelFile_EntryCounter]
  4227 000092F4 29D0                <1> 	sub	eax, edx
  4228                              <1> 	; 29/12/2017
  4229 000092F6 7205                <1> 	jc	short loc_rmdir_update_parent_dir_lmdt
  4230                              <1>  
  4231                              <1>  	; EAX = Directory Entry Number of the long name last entry
  4232 000092F8 E8EC1D0000          <1> 	call	delete_longname
  4233                              <1> 
  4234                              <1> loc_rmdir_update_parent_dir_lmdt:
  4235 000092FD E8261D0000          <1> 	call	update_parent_dir_lmdt
  4236                              <1> 	;jc	short loc_file_rw_cmd_failed
  4237                              <1> 	; 29/12/2017
  4238                              <1> 	;jc	short loc_rmdir_unlink_error_retn
  4239                              <1> 
  4240                              <1> loc_delete_sub_directory_ok:
  4241                              <1> 	; 29/12/2017
  4242 00009302 31C0                <1> 	xor	eax, eax ;  0 ;  cf = 0
  4243 00009304 C3                  <1> 	retn
  4244                              <1> 
  4245                              <1> delete_file:
  4246                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  4247                              <1> 	; 29/02/2016
  4248                              <1> 	; 28/02/2016 (TRDOS 386 = TRDOS v2.0)
  4249                              <1> 	; 09/08/2010 (CMD_INTR.ASM, 'cmp_cmd_del')
  4250                              <1> 	; 28/02/2010
  4251                              <1> 
  4252                              <1> get_delfile_fchar:
  4253                              <1> 	; esi = file name
  4254 00009305 803E20              <1> 	cmp	byte [esi], 20h
  4255 00009308 7701                <1>         ja	short loc_delfile_parse_path_name
  4256                              <1> 
  4257                              <1> loc_delfile_nofilename_retn:
  4258 0000930A C3                  <1> 	retn
  4259                              <1> 
  4260                              <1> loc_delfile_parse_path_name:
  4261 0000930B BF[AA800100]        <1> 	mov	edi, FindFile_Drv
  4262 00009310 E83F180000          <1> 	call	parse_path_name
  4263                              <1> 	;jc	loc_cmd_failed
  4264                              <1> 	; 28/07/2022
  4265 00009315 7305                <1> 	jnc	short loc_delfile_check_filename_exists
  4266                              <1> loc_delfile_failed:
  4267 00009317 E98DF2FFFF          <1> 	jmp	loc_cmd_failed
  4268                              <1> 
  4269                              <1> loc_delfile_check_filename_exists:
  4270 0000931C BE[EC800100]        <1> 	mov	esi, FindFile_Name
  4271 00009321 803E20              <1> 	cmp	byte [esi], 20h
  4272                              <1> 	;jna	loc_cmd_failed
  4273                              <1> 	; 28/07/2022
  4274 00009324 76F1                <1> 	jna	short loc_delfile_failed
  4275 00009326 8935[68810100]      <1> 	mov	[DelFile_FNPointer], esi 
  4276                              <1> 
  4277                              <1> loc_delfile_drv:
  4278 0000932C 8A15[AA800100]      <1> 	mov	dl, [FindFile_Drv]
  4279 00009332 8A35[0A780100]      <1> 	mov	dh, [Current_Drv]
  4280 00009338 8835[677F0100]      <1> 	mov	[RUN_CDRV], dh
  4281 0000933E 38F2                <1> 	cmp	dl, dh
  4282 00009340 7407                <1> 	je	short loc_delfile_change_directory
  4283                              <1> 
  4284 00009342 E89BE4FFFF          <1> 	call	change_current_drive
  4285                              <1> 	;jc	loc_file_rw_cmd_failed
  4286                              <1> 	; 28/07/2022
  4287                              <1> 	;jnc	short loc_delfile_change_directory
  4288                              <1> 	;jmp	loc_file_rw_cmd_failed
  4289 00009347 721D                <1> 	jc	short loc_delfile_chdrv_failed
  4290                              <1> 
  4291                              <1> loc_delfile_change_directory:
  4292 00009349 803D[AB800100]20    <1> 	cmp	byte [FindFile_Directory], 20h
  4293 00009350 7619                <1> 	jna	short loc_delfile_find
  4294                              <1> 
  4295 00009352 FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  4296 00009358 BE[AB800100]        <1> 	mov	esi, FindFile_Directory
  4297 0000935D 30E4                <1> 	xor	ah, ah ; CD_COMMAND sign -> 0 
  4298 0000935F E804120000          <1> 	call	change_current_directory
  4299                              <1> 	;jc	loc_file_rw_cmd_failed
  4300                              <1> 	; 28/07/2022
  4301 00009364 7305                <1> 	jnc	short loc_delfile_chdir_ok
  4302                              <1> loc_delfile_chdrv_failed:
  4303                              <1> loc_delfile_fff_failed:
  4304 00009366 E939FBFFFF          <1> 	jmp	loc_file_rw_cmd_failed
  4305                              <1> 
  4306                              <1> loc_delfile_chdir_ok: ; 28/07/2022
  4307                              <1> 
  4308                              <1> ;loc_delfile_change_prompt_dir_string:
  4309                              <1> 	;call	change_prompt_dir_string
  4310                              <1> 
  4311                              <1> loc_delfile_find:
  4312                              <1> 	;mov	esi, FindFile_Name
  4313 0000936B 8B35[68810100]      <1> 	mov	esi, [DelFile_FNPointer]
  4314 00009371 66B80018            <1> 	mov	ax, 1800h ; Except volume label and dirs
  4315 00009375 E816F7FFFF          <1> 	call	find_first_file
  4316                              <1> 	;jc	loc_file_rw_cmd_failed
  4317                              <1> 	; 28/07/2022
  4318 0000937A 72EA                <1> 	jc	short loc_delfile_fff_failed
  4319                              <1> 
  4320                              <1> loc_delfile_ambgfn_check:
  4321 0000937C 6621D2              <1> 	and	dx, dx ; Ambiguous filename chars used sign (DX>0)
  4322 0000937F 740A                <1> 	jz	short loc_delfile_found
  4323                              <1> 
  4324                              <1> loc_file_not_found:
  4325                              <1> 	;mov	eax, 2 ; File not found sign
  4326                              <1> 	; 28/07/2022
  4327 00009381 31C0                <1> 	xor	eax, eax
  4328 00009383 B002                <1> 	mov	al, 2
  4329 00009385 F9                  <1> 	stc
  4330 00009386 E919FBFFFF          <1> 	jmp	loc_file_rw_cmd_failed   
  4331                              <1> 
  4332                              <1> loc_delfile_found:
  4333 0000938B 80E307              <1> 	and	bl, 07h ; Attributes
  4334                              <1> 	;jnz	loc_permission_denied
  4335                              <1> 	; 28/07/2022
  4336 0000938E 7405                <1> 	jz	short loc_delfile_attrb_ok
  4337 00009390 E919FBFFFF          <1> 	jmp	loc_permission_denied
  4338                              <1> 
  4339                              <1> loc_delfile_attrb_ok: ; 28/07/2022
  4340                              <1> 
  4341                              <1> ;loc_delfile_found_save_lnel:
  4342                              <1> ;	mov	[DelFile_LNEL], bh ; Long name entry length (if > 0)
  4343                              <1> 
  4344                              <1> loc_delfile_ask_for_delete:
  4345 00009395 57                  <1> 	push	edi ; * (29/02/2016)
  4346                              <1> 
  4347 00009396 BE[97340100]        <1> 	mov	esi, Msg_DoYouWantDelete
  4348 0000939B E80AD9FFFF          <1> 	call	print_msg
  4349 000093A0 8B35[68810100]      <1> 	mov	esi, [DelFile_FNPointer]
  4350 000093A6 E8FFD8FFFF          <1> 	call	print_msg
  4351 000093AB BE[4B340100]        <1> 	mov	esi, Msg_YesNo
  4352 000093B0 E8F5D8FFFF          <1> 	call	print_msg
  4353                              <1> 
  4354                              <1> loc_delfile_ask_again:
  4355 000093B5 30E4                <1> 	xor	ah, ah
  4356 000093B7 E83C7BFFFF          <1> 	call	int16h
  4357 000093BC 3C1B                <1> 	cmp	al, 1Bh
  4358                              <1> 	;je	short loc_do_not_delete_file
  4359 000093BE 744C                <1> 	je	short loc_delfile_y_n_escape ; 06/03/2016
  4360 000093C0 24DF                <1> 	and	al, 0DFh
  4361 000093C2 A2[55340100]        <1> 	mov	[Y_N_nextline], al
  4362 000093C7 3C59                <1> 	cmp	al, 'Y'
  4363 000093C9 7404                <1> 	je	short loc_yes_delete_file
  4364 000093CB 3C4E                <1> 	cmp	al, 'N'
  4365 000093CD 75E6                <1> 	jne	short loc_delfile_ask_again
  4366                              <1> 
  4367                              <1> loc_do_not_delete_file:
  4368                              <1> loc_yes_delete_file:
  4369 000093CF E803FCFFFF          <1> 	call	y_n_answer ; 29/12/2017
  4370 000093D4 5F                  <1> 	pop	edi ; * (29/02/2016)
  4371                              <1> 	;cmp	al, 'Y' ; 'yes'
  4372                              <1> 	;cmc
  4373                              <1>         ;jnc	loc_file_rw_restore_retn
  4374 000093D5 3C4E                <1> 	cmp	al, 'N' ; 'no'
  4375                              <1>         ;je	loc_file_rw_restore_retn
  4376                              <1> 	; 28/07/2022
  4377 000093D7 7505                <1> 	jne	short loc_delete_file
  4378 000093D9 E9C6FAFFFF          <1> 	jmp	loc_file_rw_restore_retn
  4379                              <1> 
  4380                              <1> loc_delete_file:
  4381 000093DE 8A3D[AA800100]      <1> 	mov	bh, [FindFile_Drv]
  4382                              <1> 	;mov	bl, [DelFile_LNEL]
  4383 000093E4 8A1D[F9800100]      <1> 	mov	bl, [FindFile_LongNameEntryLength]
  4384                              <1> 	;mov	cx, [DirBuff_EntryCounter]
  4385 000093EA 668B0D[24810100]    <1> 	mov	cx, [FindFile_DirEntryNumber]
  4386                              <1> 	; (*) EDI = Directory buffer entry offset/address 
  4387 000093F1 E8CB1E0000          <1> 	call	remove_file ; (FILE.ASM, 'proc_delete_file')
  4388                              <1> 	;jnc	loc_print_deleted_message
  4389                              <1> 	; 28/07/2022
  4390 000093F6 7205                <1> 	jc	short loc_delete_file_err1
  4391 000093F8 E99DFAFFFF          <1> 	jmp	loc_print_deleted_message
  4392                              <1> 
  4393                              <1> loc_delete_file_err1:
  4394                              <1> 	;cmp	al, 05h
  4395 000093FD 3C0B                <1> 	cmp	al, ERR_PERM_DENIED  ; 29/12/2017 (5 -> 11)
  4396                              <1> 	;je	loc_permission_denied
  4397                              <1> 	; 28/07/2022
  4398 000093FF 7505                <1> 	jne	short loc_delete_file_err2
  4399 00009401 E9A8FAFFFF          <1> 	jmp	loc_permission_denied
  4400                              <1> loc_delete_file_err2:
  4401 00009406 F9                  <1> 	stc
  4402 00009407 E998FAFFFF          <1> 	jmp	loc_file_rw_cmd_failed
  4403                              <1> 
  4404                              <1> loc_delfile_y_n_escape:
  4405 0000940C B04E                <1> 	mov	al, 'N' ; 'no'
  4406 0000940E EBBF                <1> 	jmp	short loc_do_not_delete_file
  4407                              <1> 
  4408                              <1> set_file_attributes:
  4409                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  4410                              <1> 	; 06/03/2016
  4411                              <1> 	; 04/03/2016 (TRDOS 386 = TRDOS v2.0)
  4412                              <1> 	; 10/07/2010 (TRDOS v1, CMD_INTR.ASM, 'cmp_cmd_attrib')
  4413                              <1> 	; 23/05/2010 
  4414                              <1> 	; 17/12/2000 (P2000.ASM)
  4415                              <1> 
  4416                              <1> 	; esi = file or directory name
  4417                              <1> 	;xor	ax, ax
  4418                              <1> 	; 28/07/2022
  4419 00009410 31C0                <1> 	xor	eax, eax
  4420 00009412 66A3[E8340100]      <1> 	mov	[Attr_Chars], ax
  4421 00009418 A2[C0810100]        <1> 	mov	[Attributes], al
  4422                              <1> 
  4423                              <1> get_attrib_fchar:
  4424                              <1> 	; esi = file name
  4425 0000941D 8A06                <1> 	mov	al, [esi]
  4426 0000941F 3C20                <1> 	cmp	al, 20h
  4427 00009421 7621                <1> 	jna	short loc_attr_file_nofilename_retn
  4428                              <1> 
  4429                              <1> loc_scan_attrib_params:
  4430 00009423 3C2D                <1> 	cmp	al, '-'
  4431                              <1> 	;ja	loc_attr_file_parse_path_name
  4432                              <1> 	;je	short loc_attr_space
  4433                              <1> 	; 28/07/2022
  4434 00009425 7207                <1> 	jb	short loc_sfa_1
  4435 00009427 740E                <1> 	je	short loc_attr_space
  4436 00009429 E911010000          <1> 	jmp	loc_attr_file_parse_path_name
  4437                              <1> 	
  4438                              <1> loc_sfa_1:
  4439                              <1> 	; 28/07/2022
  4440 0000942E 3C2B                <1> 	cmp	al, '+'
  4441                              <1> 	;jne	loc_cmd_failed
  4442 00009430 7405                <1> 	je	short loc_attr_space
  4443                              <1> loc_sfa_2: 
  4444 00009432 E972F1FFFF          <1> 	jmp	loc_cmd_failed	
  4445                              <1> loc_attr_space:
  4446 00009437 8A6601              <1> 	mov	ah, [esi+1]
  4447 0000943A 80FC20              <1>  	cmp	ah, 20h
  4448 0000943D 7706                <1> 	ja	short pass_attr_space
  4449                              <1> 	;jb	loc_cmd_failed
  4450                              <1> 	; 28/07/2022
  4451 0000943F 72F1                <1> 	jb	short loc_sfa_2
  4452 00009441 46                  <1> 	inc	esi
  4453 00009442 EBF3                <1> 	jmp	short loc_attr_space
  4454                              <1> 
  4455                              <1> loc_attr_file_nofilename_retn:
  4456 00009444 C3                  <1> 	retn
  4457                              <1> 
  4458                              <1> pass_attr_space:
  4459 00009445 80E4DF              <1> 	and	ah, 0DFh
  4460 00009448 80FC53              <1> 	cmp	ah, 'S'
  4461                              <1> 	;ja	loc_cmd_failed
  4462                              <1> 	; 28/07/2022
  4463 0000944B 77E5                <1> 	ja	short loc_sfa_2
  4464 0000944D 7204                <1> 	jb	short pass_attr_system
  4465 0000944F B404                <1> 	mov	ah, 04h	; System
  4466 00009451 EB1D                <1> 	jmp	short pass_attr_archive
  4467                              <1> 
  4468                              <1> pass_attr_system:
  4469 00009453 80FC48              <1> 	cmp	ah, 'H'
  4470 00009456 7706                <1> 	ja	short pass_attr_hidden
  4471 00009458 720F                <1> 	jb	short pass_attr_read_only
  4472 0000945A B402                <1> 	mov	ah, 02h	; Hidden
  4473 0000945C EB12                <1> 	jmp	short pass_attr_archive
  4474                              <1> 
  4475                              <1> pass_attr_hidden:
  4476 0000945E 80FC52              <1> 	cmp	ah, 'R'
  4477                              <1> 	;ja	loc_cmd_failed
  4478                              <1> 	; 28/07/2022
  4479 00009461 77CF                <1> 	ja	short loc_sfa_2
  4480 00009463 7204                <1> 	jb	short pass_attr_read_only ; Read only
  4481 00009465 B401                <1> 	mov	ah, 01h
  4482 00009467 EB07                <1> 	jmp	short pass_attr_archive
  4483                              <1> 
  4484                              <1> pass_attr_read_only:
  4485 00009469 80FC41              <1> 	cmp	ah, 'A'
  4486 0000946C 753B                <1> 	jne	short loc_chk_attr_enter
  4487 0000946E B420                <1> 	mov	ah, 20h	; Archive
  4488                              <1> 
  4489                              <1> pass_attr_archive:
  4490 00009470 3C2D                <1> 	cmp	al, '-'
  4491 00009472 7508                <1> 	jne	short pass_reducing_attributes
  4492 00009474 0825[E8340100]      <1> 	or	[Attr_Chars], ah
  4493 0000947A EB06                <1> 	jmp	short loc_change_attributes_inc
  4494                              <1> 
  4495                              <1> pass_reducing_attributes:
  4496 0000947C 0825[E9340100]      <1> 	or	[Attr_Chars+1], ah
  4497                              <1> 
  4498                              <1> loc_change_attributes_inc:
  4499 00009482 46                  <1> 	inc	esi
  4500 00009483 8A6601              <1> 	mov	ah, [esi+1]
  4501 00009486 80FC20              <1> 	cmp	ah, 20h
  4502 00009489 7228                <1> 	jb	short pass_change_attr
  4503 0000948B 74F5                <1> 	je	short loc_change_attributes_inc
  4504 0000948D 80FC2D              <1> 	cmp	ah, '-'
  4505 00009490 770D                <1> 	ja	short loc_chk_next_attr_char1
  4506 00009492 7405                <1> 	je	short loc_chk_next_attr_char0
  4507 00009494 80FC2B              <1> 	cmp	ah, '+'
  4508 00009497 7506                <1> 	jne	short loc_chk_next_attr_char1
  4509                              <1> 
  4510                              <1> loc_chk_next_attr_char0:
  4511 00009499 46                  <1> 	inc	esi
  4512 0000949A 668B06              <1> 	mov	ax, [esi]
  4513 0000949D EBA6                <1> 	jmp	short pass_attr_space
  4514                              <1> 
  4515                              <1> loc_chk_next_attr_char1:
  4516 0000949F 803E2D              <1> 	cmp	byte [esi], '-'
  4517 000094A2 77A1                <1> 	ja	short pass_attr_space
  4518 000094A4 E989000000          <1>         jmp     loc_attr_file_check_fname_fchar
  4519                              <1> 
  4520                              <1> loc_chk_attr_enter:
  4521 000094A9 80FC0D              <1> 	cmp	ah, 0Dh
  4522                              <1> 	;jne	loc_cmd_failed
  4523                              <1> 	; 28/07/202
  4524 000094AC 7405                <1> 	je	short pass_change_attr
  4525 000094AE E9F6F0FFFF          <1> 	jmp	loc_cmd_failed
  4526                              <1> 
  4527                              <1> pass_change_attr:
  4528 000094B3 A0[E8340100]        <1> 	mov	al, [Attr_Chars]
  4529 000094B8 F6D0                <1> 	not	al
  4530 000094BA 2005[C0810100]      <1> 	and	[Attributes], al
  4531 000094C0 A0[E9340100]        <1> 	mov	al, [Attr_Chars+1]
  4532 000094C5 0805[C0810100]      <1> 	or	[Attributes], al
  4533                              <1> 
  4534                              <1> loc_show_attributes:
  4535 000094CB BE[4B3A0100]        <1> 	mov	esi, nextline
  4536 000094D0 E8D5D7FFFF          <1> 	call	print_msg
  4537                              <1> 
  4538                              <1> loc_show_attributes_no_nextline:
  4539 000094D5 C705[E8340100]4E4F- <1> 	mov	dword [Attr_Chars], 'NORM'
  4539 000094DD 524D                <1>
  4540 000094DF 66C705[EC340100]41- <1> 	mov	word [Attr_Chars+4], 'AL'
  4540 000094E7 4C                  <1>
  4541 000094E8 BE[E8340100]        <1> 	mov	esi, Attr_Chars
  4542 000094ED A0[C0810100]        <1> 	mov	al, [Attributes]
  4543 000094F2 A804                <1> 	test	al, 04h
  4544 000094F4 7406                <1> 	jz	short pass_put_attr_s
  4545 000094F6 66C7065300          <1> 	mov	word [esi], 0053h     ; S
  4546 000094FB 46                  <1> 	inc	esi
  4547                              <1> 
  4548                              <1> pass_put_attr_s:
  4549 000094FC A802                <1> 	test	al, 02h
  4550 000094FE 7406                <1> 	jz	short pass_put_attr_h
  4551 00009500 66C7064800          <1> 	mov	word [esi], 0048h     ; H
  4552 00009505 46                  <1> 	inc	esi
  4553                              <1> 
  4554                              <1> pass_put_attr_h:
  4555 00009506 A801                <1> 	test	al, 01h
  4556 00009508 7406                <1> 	jz	short pass_put_attr_r
  4557 0000950A 66C7065200          <1> 	mov	word [esi], 0052h     ; R
  4558 0000950F 46                  <1> 	inc	esi
  4559                              <1> 
  4560                              <1> pass_put_attr_r:
  4561 00009510 3C20                <1> 	cmp	al, 20h
  4562 00009512 7205                <1> 	jb	short pass_put_attr_a
  4563 00009514 66C7064100          <1> 	mov	word [esi], 0041h     ; A
  4564                              <1> 
  4565                              <1> pass_put_attr_a:
  4566 00009519 BE[DB340100]        <1> 	mov	esi, Str_Attributes
  4567 0000951E E887D7FFFF          <1> 	call	print_msg
  4568 00009523 BE[4B3A0100]        <1> 	mov	esi, nextline
  4569 00009528 E87DD7FFFF          <1> 	call	print_msg
  4570 0000952D E972F9FFFF          <1> 	jmp	loc_file_rw_restore_retn 
  4571                              <1> 
  4572                              <1> loc_attr_file_check_fname_fchar:
  4573 00009532 46                  <1> 	inc	esi
  4574 00009533 803E20              <1> 	cmp	byte [esi], 20h
  4575 00009536 74FA                <1> 	je	short loc_attr_file_check_fname_fchar
  4576                              <1>         ;jb	pass_change_attr
  4577                              <1> 	; 28/07/2022
  4578 00009538 7705                <1> 	ja	short loc_attr_file_parse_path_name
  4579 0000953A E974FFFFFF          <1> 	jmp	pass_change_attr	
  4580                              <1> 	   
  4581                              <1> loc_attr_file_parse_path_name:
  4582 0000953F BF[AA800100]        <1> 	mov	edi, FindFile_Drv
  4583 00009544 E80B160000          <1> 	call	parse_path_name
  4584                              <1> 	;jc	loc_cmd_failed
  4585                              <1> 	; 28/07/2022
  4586 00009549 7305                <1> 	jnc	short loc_attr_file_check_filename_exists
  4587                              <1> loc_sfa_3:
  4588 0000954B E959F0FFFF          <1> 	jmp	loc_cmd_failed
  4589                              <1> 
  4590                              <1> loc_attr_file_check_filename_exists:
  4591 00009550 BE[EC800100]        <1> 	mov	esi, FindFile_Name
  4592 00009555 803E20              <1> 	cmp	byte [esi], 20h
  4593                              <1> 	;jna	loc_cmd_failed
  4594                              <1> 	; 28/07/2022
  4595 00009558 76F1                <1> 	jna	short loc_sfa_3
  4596 0000955A 8935[68810100]      <1> 	mov	[DelFile_FNPointer], esi 
  4597                              <1> 
  4598                              <1> loc_attr_file_drv:
  4599 00009560 8A35[0A780100]      <1> 	mov	dh, [Current_Drv]
  4600 00009566 8835[677F0100]      <1> 	mov	[RUN_CDRV], dh
  4601                              <1> 
  4602 0000956C 8A15[AA800100]      <1> 	mov	dl, [FindFile_Drv]
  4603 00009572 38F2                <1> 	cmp	dl, dh
  4604 00009574 7407                <1> 	je	short loc_attr_file_change_directory
  4605                              <1> 
  4606 00009576 E867E2FFFF          <1> 	call	change_current_drive
  4607                              <1> 	;jc	loc_file_rw_cmd_failed
  4608                              <1> 	; 28/07/2022
  4609 0000957B 722E                <1> 	jc	short loc_sfa_4
  4610                              <1> 
  4611                              <1> loc_attr_file_change_directory:
  4612 0000957D 803D[AB800100]20    <1>         cmp     byte [FindFile_Directory], 20h
  4613 00009584 7614                <1> 	jna	short loc_attr_file_find
  4614                              <1> 
  4615 00009586 FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  4616                              <1> 	
  4617 0000958C BE[AB800100]        <1> 	mov	esi, FindFile_Directory
  4618 00009591 30E4                <1> 	xor	ah, ah ; CD_COMMAND sign -> 0 
  4619 00009593 E8D00F0000          <1> 	call	change_current_directory
  4620                              <1> 	;jc	loc_file_rw_cmd_failed
  4621                              <1> 	; 28/07/2022
  4622 00009598 7211                <1> 	jc	short loc_sfa_4
  4623                              <1> 
  4624                              <1> ;loc_attr_file_change_prompt_dir_string:
  4625                              <1> 	;call	change_prompt_dir_string
  4626                              <1> 
  4627                              <1> loc_attr_file_find:
  4628                              <1> 	;mov	esi, FindFile_Name
  4629 0000959A 8B35[68810100]      <1> 	mov	esi, [DelFile_FNPointer]
  4630 000095A0 66B80008            <1> 	mov	ax, 0800h ; Except volume labels
  4631 000095A4 E8E7F4FFFF          <1> 	call	find_first_file
  4632                              <1> 	;jc	loc_file_rw_cmd_failed
  4633                              <1> 	; 28/07/2022
  4634 000095A9 7305                <1> 	jnc	short loc_attr_file_ambgfn_check
  4635                              <1> loc_sfa_4:
  4636 000095AB E9F4F8FFFF          <1> 	jmp	loc_file_rw_cmd_failed
  4637                              <1> 
  4638                              <1> loc_attr_file_ambgfn_check:
  4639 000095B0 6609D2              <1> 	or	dx, dx ; Ambiguous filename chars used sign (DX>0)
  4640                              <1> 	;	(Note: It was BX in TRDOS v1)
  4641                              <1> 	;;jz	short loc_attr_file_found
  4642                              <1> 	;jnz	loc_file_not_found ; 06/03/2016
  4643                              <1> 	; 28/07/2022 
  4644 000095B3 7405                <1> 	jz	short loc_attr_file_found
  4645 000095B5 E9C7FDFFFF          <1> 	jmp	loc_file_not_found	
  4646                              <1> 
  4647                              <1> 	;mov	eax, 2 ; File not found sign
  4648                              <1> 	;stc
  4649                              <1> 	;jmp	loc_file_rw_cmd_failed   
  4650                              <1> 
  4651                              <1> loc_attr_file_found:
  4652                              <1> 	; EDI = Directory buffer entry offset/address
  4653                              <1> 	; BL = File (or Directory) Attributes 
  4654                              <1> 	;	(Note: It was 'CL' in TRDOS v1)
  4655                              <1> 	; mov	bl, [EDI+0Bh]
  4656                              <1> 	
  4657 000095BA 66833D[E8340100]00  <1> 	cmp	word [Attr_Chars], 0
  4658 000095C2 770B                <1> 	ja	short loc_attr_file_change_attributes
  4659 000095C4 881D[C0810100]      <1> 	mov	[Attributes], bl
  4660 000095CA E9FCFEFFFF          <1> 	jmp	loc_show_attributes
  4661                              <1> 
  4662                              <1> loc_attr_file_change_attributes:
  4663 000095CF A0[E8340100]        <1> 	mov	al, [Attr_Chars]
  4664 000095D4 F6D0                <1> 	not	al
  4665 000095D6 20C3                <1> 	and	bl, al
  4666 000095D8 A0[E9340100]        <1> 	mov	al, [Attr_Chars+1]
  4667 000095DD 08C3                <1> 	or	bl, al
  4668                              <1> 
  4669 000095DF 66817F0CA101        <1> 	cmp	word [edi+DirEntry_NTRes], 01A1h ; Singlix FS
  4670 000095E5 741C                <1> 	je	short loc_attr_file_fs_check
  4671                              <1> 
  4672 000095E7 881D[C0810100]      <1> 	mov	[Attributes], bl
  4673 000095ED 885F0B              <1> 	mov	[edi+0Bh], bl    ; Attributes (New!)
  4674                              <1> 
  4675                              <1> 	; 04/03/2016
  4676                              <1> 	; TRDOS v1 has a bug here! it does not set
  4677                              <1> 	; 'DirBuff_ValidData' to 2; as result of this bug,
  4678                              <1> 	; 'save_directory_buffer' would not save the new attributes ! 
  4679                              <1> 	
  4680 000095F0 C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2
  4681                              <1> 
  4682 000095F7 E894190000          <1> 	call 	save_directory_buffer
  4683                              <1> 	;jc	loc_file_rw_cmd_failed
  4684                              <1> 	;jmp	short loc_print_attr_changed_message
  4685                              <1> 	; 28/07/2022
  4686 000095FC 7334                <1> 	jnc	short loc_print_attr_changed_message
  4687                              <1> loc_sfa_5:
  4688 000095FE E9A1F8FFFF          <1> 	jmp	loc_file_rw_cmd_failed 
  4689                              <1> 
  4690                              <1> loc_attr_file_fs_check:
  4691 00009603 29C0                <1> 	sub	eax, eax
  4692 00009605 8A25[2F7F0100]      <1>         mov     ah, [DirBuff_DRV]
  4693 0000960B BE00010900          <1> 	mov	esi, Logical_DOSDisks
  4694 00009610 01C6                <1>         add     esi, eax
  4695 00009612 807E04A1            <1>         cmp     byte [esi+LD_FSType], 0A1h
  4696 00009616 7309                <1> 	jnc	short loc_attr_file_change_fs_file_attributes
  4697                              <1> 	; 29/12/2017 (0Dh -> 29)	
  4698 00009618 66B81D00            <1> 	mov	ax, 29 ; Invalid Data
  4699 0000961C E983F8FFFF          <1> 	jmp	loc_file_rw_cmd_failed
  4700                              <1> 
  4701                              <1> loc_attr_file_change_fs_file_attributes:
  4702                              <1> 	; BL = New MS-DOS File Attributes
  4703 00009621 88D8                <1> 	mov	al, bl ; File/Directory Attributes
  4704 00009623 30E4                <1> 	xor	ah, ah ; Attributes in MS-DOS format sign	  
  4705 00009625 E848050000          <1> 	call	change_fs_file_attributes
  4706                              <1> 	;jc	loc_file_rw_cmd_failed
  4707                              <1> 	; 28/07/2022
  4708 0000962A 72D2                <1> 	jc	short loc_sfa_5
  4709                              <1> 
  4710 0000962C 881D[C0810100]      <1> 	mov	[Attributes], bl 
  4711                              <1> 
  4712                              <1> loc_print_attr_changed_message:
  4713 00009632 BE[D6340100]        <1> 	mov	esi, Msg_New
  4714 00009637 E86ED6FFFF          <1> 	call	print_msg
  4715 0000963C E994FEFFFF          <1> 	jmp	loc_show_attributes_no_nextline
  4716                              <1> 
  4717                              <1> rename_file:
  4718                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  4719                              <1> 	; 13/11/2017
  4720                              <1> 	; 06/11/2016
  4721                              <1> 	; 05/11/2016
  4722                              <1> 	; 16/10/2016
  4723                              <1> 	; 08/03/2016
  4724                              <1> 	; 06/03/2016 (TRDOS 386 = TRDOS v2.0)
  4725                              <1> 	; 20/11/2010 (TRDOS v1, CMD_INTR.ASM, 'cmp_cmd_rename')
  4726                              <1> 	; 16/11/2010 
  4727                              <1> 
  4728                              <1> get_rename_source_fchar:
  4729                              <1> 	; esi = file name
  4730 00009641 803E20              <1> 	cmp	byte [esi], 20h
  4731 00009644 7613                <1>         jna	short loc_rename_nofilename_retn
  4732                              <1> 
  4733 00009646 8935[E8810100]      <1> 	mov	[SourceFilePath], esi
  4734                              <1> 
  4735                              <1> rename_scan_source_file:
  4736 0000964C 46                  <1> 	inc	esi
  4737 0000964D 803E20              <1> 	cmp	byte [esi], 20h
  4738 00009650 7408                <1> 	je	short rename_scan_destination_file_1
  4739                              <1> 	;;jb	short loc_rename_nofilename_retn
  4740                              <1> 	;jb	loc_cmd_failed
  4741                              <1> 	;jmp	short rename_scan_source_file
  4742                              <1> 	; 28/07/2022
  4743 00009652 77F8                <1> 	ja	short rename_scan_source_file
  4744                              <1> loc_rename_failed:
  4745 00009654 E950EFFFFF          <1> 	jmp	loc_cmd_failed
  4746                              <1> 
  4747                              <1> loc_rename_nofilename_retn: ; 08/03/2016
  4748 00009659 C3                  <1> 	retn
  4749                              <1> 
  4750                              <1> rename_scan_destination_file_1:
  4751 0000965A C60600              <1> 	mov	byte [esi], 0
  4752                              <1> 
  4753                              <1> rename_scan_destination_file_2:
  4754 0000965D 46                  <1> 	inc	esi  
  4755 0000965E 803E20              <1> 	cmp	byte [esi], 20h
  4756 00009661 74FA                <1> 	je	short rename_scan_destination_file_2
  4757                              <1> 	;;jb	short loc_rename_nofilename_retn
  4758                              <1> 	;jb	loc_cmd_failed
  4759                              <1> 	; 28/07/2022
  4760 00009663 72EF                <1> 	jb	short loc_rename_failed
  4761                              <1> 
  4762 00009665 8935[EC810100]      <1> 	mov	[DestinationFilePath], esi
  4763                              <1> 
  4764                              <1> rename_scan_destination_file_3:
  4765 0000966B 46                  <1> 	inc	esi  
  4766 0000966C 803E20              <1> 	cmp	byte [esi], 20h
  4767 0000966F 77FA                <1> 	ja	short rename_scan_destination_file_3
  4768                              <1> 
  4769 00009671 C60600              <1> 	mov	byte [esi], 0
  4770                              <1> 
  4771                              <1> loc_rename_save_current_drive:
  4772 00009674 8A35[0A780100]      <1> 	mov	dh, [Current_Drv]
  4773 0000967A 8835[677F0100]      <1> 	mov	byte [RUN_CDRV], dh
  4774                              <1> 
  4775                              <1> loc_rename_sf_parse_path_name:
  4776 00009680 8B35[E8810100]      <1> 	mov	esi, [SourceFilePath] 
  4777 00009686 BF[AA800100]        <1> 	mov	edi, FindFile_Drv
  4778 0000968B E8C4140000          <1> 	call	parse_path_name
  4779                              <1> 	;jc	loc_cmd_failed
  4780                              <1> 	; 28/07/2022
  4781 00009690 72C2                <1> 	jc	short loc_rename_failed
  4782                              <1> 
  4783                              <1> loc_rename_sf_check_filename_exists:
  4784 00009692 BE[EC800100]        <1> 	mov	esi, FindFile_Name
  4785 00009697 803E20              <1> 	cmp	byte [esi], 20h
  4786                              <1> 	;jna	loc_cmd_failed
  4787                              <1> 	; 28/07/2022
  4788 0000969A 76B8                <1> 	jna	short loc_rename_failed
  4789                              <1> 
  4790                              <1> 	;mov	[DelFile_FNPointer], esi 
  4791                              <1> 
  4792                              <1> loc_rename_sf_drv:
  4793                              <1> 	;mov	dh, [Current_Drv]
  4794                              <1> 	;mov	[RUN_CDRV], dh
  4795                              <1> 
  4796 0000969C 8A15[AA800100]      <1> 	mov	dl, [FindFile_Drv]
  4797 000096A2 38F2                <1> 	cmp	dl, dh ; dh = [Current_Drv]
  4798 000096A4 7407                <1> 	je	short rename_sf_change_directory
  4799                              <1> 
  4800 000096A6 E837E1FFFF          <1> 	call	change_current_drive
  4801                              <1>  	;jc	loc_file_rw_cmd_failed
  4802                              <1> 	; 28/07/2022
  4803 000096AB 722D                <1> 	jc	short loc_rename_fff_failed
  4804                              <1> 
  4805                              <1> rename_sf_change_directory:
  4806 000096AD 803D[AB800100]20    <1> 	cmp	byte [FindFile_Directory], 20h
  4807 000096B4 7614                <1> 	jna	short rename_sf_find
  4808                              <1> 
  4809 000096B6 FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  4810 000096BC BE[AB800100]        <1> 	mov	esi, FindFile_Directory
  4811 000096C1 30E4                <1> 	xor	ah, ah ; CD_COMMAND sign -> 0 
  4812 000096C3 E8A00E0000          <1> 	call	change_current_directory
  4813                              <1>  	;jc	loc_file_rw_cmd_failed
  4814                              <1> 	; 28/07/2022
  4815 000096C8 7210                <1> 	jc	short loc_rename_fff_failed
  4816                              <1> 
  4817                              <1> ;rename_sf_change_prompt_dir_string:
  4818                              <1> 	;call	change_prompt_dir_string
  4819                              <1> 
  4820                              <1> rename_sf_find:
  4821                              <1> 	;mov	esi, [DelFile_FNPointer]
  4822 000096CA BE[EC800100]        <1> 	mov	esi, FindFile_Name
  4823                              <1> 
  4824 000096CF 66B80008            <1> 	mov	ax, 0800h ; Except volume labels
  4825 000096D3 E8B8F3FFFF          <1> 	call	find_first_file
  4826                              <1> 	;jc	loc_file_rw_cmd_failed
  4827                              <1> 	; 28/07/2022
  4828 000096D8 7305                <1> 	jnc	short loc_rename_sf_ambgfn_check
  4829                              <1> 
  4830                              <1> loc_rename_fff_failed:
  4831 000096DA E9C5F7FFFF          <1> 	jmp	loc_file_rw_cmd_failed
  4832                              <1> 
  4833                              <1> loc_rename_sf_ambgfn_check:
  4834 000096DF 6621D2              <1> 	and	dx, dx ; Ambiguous filename chars used sign (DX>0)
  4835                              <1> 	;	(Note: It was BX in TRDOS v1)
  4836                              <1> 	;;jz	short loc_rename_sf_found
  4837                              <1> 	;jnz	loc_file_not_found
  4838                              <1> 	; 28/07/2022
  4839 000096E2 7405                <1> 	jz	short loc_rename_sf_found
  4840 000096E4 E998FCFFFF          <1> 	jmp	loc_file_not_found
  4841                              <1> 
  4842                              <1> 	;mov	eax, 2 ; File not found sign
  4843                              <1> 	;stc
  4844                              <1> 	;jmp	loc_file_rw_cmd_failed   
  4845                              <1> 
  4846                              <1> loc_rename_sf_found:
  4847                              <1> 	; EDI = Directory buffer entry offset/address
  4848                              <1> 	; BL = File (or Directory) Attributes 
  4849                              <1> 	;	(Note: It was 'CL' in TRDOS v1)
  4850                              <1> 	; mov	bl, [EDI+0Bh]
  4851                              <1> 
  4852 000096E9 F6C307              <1> 	test	bl, 07h ; Attributes, S-H-R
  4853                              <1> 	;jnz	loc_permission_denied
  4854                              <1> 	; 28/07/2022
  4855 000096EC 7405                <1> 	jz	short loc_rename_attrb_ok
  4856 000096EE E9BBF7FFFF          <1> 	jmp	loc_permission_denied
  4857                              <1> 
  4858                              <1> loc_rename_attrb_ok:	
  4859 000096F3 BE[AA800100]        <1>         mov     esi, FindFile_Drv
  4860 000096F8 BF[F0810100]        <1>         mov     edi, SourceFile_Drv
  4861 000096FD B920000000          <1> 	mov	ecx, 32
  4862 00009702 F3A5                <1> 	rep	movsd
  4863                              <1> 
  4864                              <1> loc_rename_df_parse_path_name:
  4865 00009704 8B35[EC810100]      <1> 	mov	esi, [DestinationFilePath]
  4866 0000970A BF[AA800100]        <1> 	mov	edi, FindFile_Drv
  4867 0000970F E840140000          <1> 	call	parse_path_name
  4868 00009714 7219                <1> 	jc	short loc_rename_df_cmd_failed
  4869                              <1> 
  4870                              <1> 	;mov	dh, [RUN_CDRV]
  4871 00009716 8A35[0A780100]      <1> 	mov	dh, [Current_Drv]
  4872                              <1> 
  4873                              <1> 	; 'rename' command is valid only for same dos drive and same dir!
  4874                              <1> 	; ('move' command must be used if source file and destination file
  4875                              <1> 	; directories are not same!) 
  4876 0000971C 8A15[AA800100]      <1> 	mov	dl, [FindFile_Drv]
  4877 00009722 38F2                <1> 	cmp	dl, dh ; are source and destination drives different ?!
  4878 00009724 7509                <1> 	jne	short loc_rename_df_cmd_failed ; yes! 
  4879                              <1> 
  4880                              <1> rename_df_check_dirname_exists:
  4881 00009726 803D[AB800100]00    <1> 	cmp	byte [FindFile_Directory], 0
  4882 0000972D 760B                <1> 	jna	short rename_df_check_filename_exists
  4883                              <1> 
  4884                              <1> 	; different source file and destination file directories !
  4885                              <1> loc_rename_df_cmd_failed:
  4886 0000972F B801000000          <1> 	mov	eax, 1 ; TRDOS 'Bad command or file name' error
  4887 00009734 F9                  <1> 	stc
  4888 00009735 E96AF7FFFF          <1> 	jmp	loc_file_rw_cmd_failed
  4889                              <1> 	  
  4890                              <1> rename_df_check_filename_exists:
  4891 0000973A BE[EC800100]        <1> 	mov	esi, FindFile_Name
  4892 0000973F E8F1F6FFFF          <1> 	call	check_filename
  4893                              <1> 	;jc	loc_mkdir_invalid_dir_name_chars
  4894                              <1> 	; 28/07/2022
  4895 00009744 7305                <1> 	jnc	short loc_rename_file_name_ok
  4896 00009746 E90BF8FFFF          <1> 	jmp	loc_mkdir_invalid_dir_name_chars
  4897                              <1> 
  4898                              <1> loc_rename_file_name_ok:
  4899                              <1> 	;mov	[DelFile_FNPointer], esi 
  4900                              <1> 	;cmp	byte [esi], 20h
  4901                              <1> 	;ja	short loc_rename_df_find
  4902                              <1> 
  4903                              <1> 	;mov	dh, [Current_Drv] ; dh has not been changed
  4904                              <1> 
  4905                              <1> rename_df_drv_check_writable:
  4906 0000974B 0FB6F6              <1> 	movzx	esi, dh
  4907                              <1> 	;movzx	esi, byte [Current_Drv]
  4908 0000974E 81C600010900        <1> 	add	esi, Logical_DOSDisks
  4909                              <1> 
  4910 00009754 88F2                <1> 	mov	dl, dh ; dl = [Current_Drv]
  4911 00009756 8A7601              <1> 	mov	dh, [esi+LD_DiskType]
  4912                              <1> 
  4913 00009759 80FE01              <1> 	cmp	dh, 1 ; 0 = Invalid
  4914 0000975C 7310                <1> 	jnb	short rename_df_compare_sf_df_name
  4915                              <1> 
  4916                              <1> 	; 16/10/2016 (13h -> 30)
  4917 0000975E B81E000000          <1> 	mov	eax, 30 ; 'Disk write-protected' error
  4918 00009763 8B1D[EC810100]      <1> 	mov	ebx, [DestinationFilePath] 
  4919 00009769 E936F7FFFF          <1> 	jmp	loc_file_rw_cmd_failed
  4920                              <1> 
  4921                              <1> rename_df_compare_sf_df_name:
  4922 0000976E BE[EC800100]        <1> 	mov	esi, FindFile_Name
  4923 00009773 BF[32820100]        <1> 	mov	edi, SourceFile_Name
  4924                              <1> 	;mov	ecx, 12
  4925                              <1> 	; 28/07/2022
  4926 00009778 29C9                <1> 	sub	ecx, ecx
  4927 0000977A B10C                <1> 	mov	cl, 12
  4928                              <1> rename_df_compare_sf_df_name_next: 
  4929 0000977C AC                  <1> 	lodsb
  4930 0000977D AE                  <1> 	scasb
  4931 0000977E 7506                <1> 	jne	short loc_rename_df_find
  4932 00009780 08C0                <1> 	or	al, al
  4933 00009782 74AB                <1> 	jz	short loc_rename_df_cmd_failed
  4934 00009784 E2F6                <1> 	loop	rename_df_compare_sf_df_name_next 
  4935                              <1> 
  4936                              <1> loc_rename_df_find:
  4937                              <1> 	;mov	esi, [DelFile_FNPointer]
  4938 00009786 BE[EC800100]        <1> 	mov	esi, FindFile_Name
  4939                              <1> 
  4940                              <1> 	;xor	ax, ax ; Any
  4941                              <1> 	; 28/07/2022
  4942 0000978B 31C0                <1> 	xor	eax, eax ; 0 ; Any
  4943 0000978D E8FEF2FFFF          <1> 	call	find_first_file
  4944                              <1> 	;;jnc	short loc_rename_df_found
  4945                              <1> 	;; 29/12/2017
  4946                              <1> 	;jnc	loc_permission_denied
  4947                              <1> 	; 28/07/2022
  4948 00009792 7205                <1> 	jc	short loc_rename_df_check_error_code
  4949 00009794 E915F7FFFF          <1> 	jmp	loc_permission_denied	
  4950                              <1> 
  4951                              <1> loc_rename_df_check_error_code:
  4952                              <1> 	;cmp	eax, 2
  4953 00009799 3C02                <1> 	cmp	al, 2 ; Not found error
  4954 0000979B 7406                <1> 	je	short rename_df_move_find_struct_to_dest
  4955 0000979D F9                  <1> 	stc
  4956 0000979E E901F7FFFF          <1> 	jmp	loc_file_rw_cmd_failed
  4957                              <1> 
  4958                              <1> ;loc_rename_df_found:
  4959                              <1> 	; 05/11/2016
  4960                              <1> 	; Permission denied error
  4961                              <1> 	;mov	eax, ERR_PERM_DENIED ; 29/12/2017
  4962                              <1> 	;stc
  4963                              <1> 	;jmp	loc_permission_denied  ; 06/11/2016
  4964                              <1> 
  4965                              <1> rename_df_move_find_struct_to_dest:
  4966 000097A3 BE[AA800100]        <1>         mov     esi, FindFile_Drv
  4967 000097A8 BF[70820100]        <1>         mov     edi, DestinationFile_Drv
  4968                              <1> 	;mov	ecx, 32
  4969                              <1> 	; 28/07/2022
  4970 000097AD 29C9                <1> 	sub	ecx, ecx
  4971 000097AF B120                <1> 	mov	cl, 32
  4972 000097B1 F3A5                <1> 	rep	movsd
  4973                              <1> 
  4974                              <1> loc_rename_df_process_q_sf:
  4975                              <1> 	;mov	ecx, 12
  4976 000097B3 B10C                <1> 	mov	cl, 12
  4977 000097B5 BE[32820100]        <1>  	mov	esi, SourceFile_Name
  4978 000097BA BF[17350100]        <1> 	mov	edi, Rename_OldName
  4979                              <1> rename_df_process_q_nml_1_sf:
  4980 000097BF AC                  <1> 	lodsb
  4981 000097C0 3C20                <1>         cmp	al, 20h
  4982 000097C2 7603                <1>         jna	short rename_df_process_q_nml_2_sf
  4983 000097C4 AA                  <1> 	stosb
  4984 000097C5 E2F8                <1> 	loop	rename_df_process_q_nml_1_sf
  4985                              <1> 
  4986                              <1> rename_df_process_q_nml_2_sf:
  4987 000097C7 C60700              <1> 	mov	byte [edi], 0
  4988                              <1> 
  4989                              <1> loc_rename_df_process_q_df:
  4990                              <1> 	;mov	ecx, 12
  4991 000097CA B10C                <1> 	mov	cl, 12
  4992 000097CC BE[B2820100]        <1> 	mov	esi, DestinationFile_Name
  4993 000097D1 BF[28350100]        <1> 	mov	edi, Rename_NewName
  4994                              <1> rename_df_process_q_nml_1_df:
  4995 000097D6 AC                  <1> 	lodsb
  4996 000097D7 3C20                <1> 	cmp	al, 20h
  4997 000097D9 7603                <1> 	jna	short loc_rename_df_process_q_nml_2_df
  4998 000097DB AA                  <1> 	stosb
  4999 000097DC E2F8                <1> 	loop	rename_df_process_q_nml_1_df
  5000                              <1> 
  5001                              <1> loc_rename_df_process_q_nml_2_df:
  5002 000097DE C60700              <1> 	mov	byte [edi], 0
  5003                              <1> 
  5004                              <1> loc_rename_confirmation_question:
  5005 000097E1 BE[EF340100]        <1> 	mov	esi, Msg_DoYouWantRename
  5006 000097E6 E8BFD4FFFF          <1> 	call	print_msg
  5007                              <1> 
  5008 000097EB A0[4D820100]        <1> 	mov	al, [SourceFile_DirEntry+11] ; Attributes
  5009 000097F0 2410                <1> 	and	al, 10h
  5010 000097F2 750C                <1> 	jnz	short rename_confirmation_question_dir
  5011                              <1> 
  5012                              <1> rename_confirmation_question_file:
  5013 000097F4 BE[06350100]        <1> 	mov	esi, Rename_File
  5014 000097F9 E8ACD4FFFF          <1> 	call	print_msg 
  5015 000097FE EB0A                <1> 	jmp	short rename_confirmation_question_as 
  5016                              <1> 
  5017                              <1> rename_confirmation_question_dir:
  5018 00009800 BE[0C350100]        <1> 	mov	esi, Rename_Directory
  5019 00009805 E8A0D4FFFF          <1> 	call	print_msg
  5020                              <1> 
  5021                              <1> rename_confirmation_question_as:
  5022 0000980A BE[17350100]        <1> 	mov	esi, Rename_OldName
  5023 0000980F E896D4FFFF          <1> 	call	print_msg
  5024 00009814 BE[24350100]        <1> 	mov	esi, Msg_File_rename_as
  5025 00009819 E88CD4FFFF          <1> 	call	print_msg
  5026 0000981E BE[4B340100]        <1> 	mov	esi, Msg_YesNo
  5027 00009823 E882D4FFFF          <1> 	call	print_msg
  5028                              <1> 
  5029                              <1> loc_rename_ask_again:
  5030 00009828 30E4                <1> 	xor	ah, ah
  5031 0000982A E8C976FFFF          <1> 	call	int16h
  5032 0000982F 3C1B                <1> 	cmp	al, 1Bh
  5033 00009831 740F                <1> 	je	short loc_do_not_rename_file
  5034 00009833 24DF                <1> 	and	al, 0DFh
  5035 00009835 A2[55340100]        <1> 	mov	[Y_N_nextline], al
  5036 0000983A 3C59                <1> 	cmp	al, 'Y'
  5037 0000983C 7404                <1> 	je	short loc_yes_rename_file
  5038 0000983E 3C4E                <1> 	cmp	al, 'N'
  5039 00009840 75E6                <1> 	jne	short loc_rename_ask_again
  5040                              <1> 
  5041                              <1> loc_do_not_rename_file:
  5042                              <1> loc_yes_rename_file:
  5043 00009842 E890F7FFFF          <1> 	call	y_n_answer ; 29/12/2017
  5044                              <1> 	;cmp	al, 'Y' ; 'yes'
  5045                              <1> 	;cmc
  5046                              <1>         ;jnc	loc_file_rw_restore_retn
  5047 00009847 3C4E                <1> 	cmp	al, 'N' ; 'no'
  5048                              <1> 	;je	loc_file_rw_restore_retn
  5049                              <1> 	; 28/07/2022
  5050 00009849 7505                <1> 	jne	short loc_rename_file_yes
  5051 0000984B E954F6FFFF          <1> 	jmp	loc_file_rw_restore_retn
  5052                              <1> 
  5053                              <1> loc_rename_file_yes: ; 28/07/2022
  5054 00009850 BE[28350100]        <1> 	mov	esi, Rename_NewName
  5055 00009855 668B0D[6A820100]    <1> 	mov	cx, [SourceFile_DirEntryNumber] 
  5056 0000985C 66A1[56820100]      <1> 	mov	ax, [SourceFile_DirEntry+20] ; First Cluster, HW 
  5057 00009862 C1E010              <1> 	shl	eax, 16 ; 13/11/2017
  5058 00009865 66A1[5C820100]      <1> 	mov	ax, [SourceFile_DirEntry+26] ; First Cluster, LW 
  5059                              <1> 
  5060 0000986B 0FB61D[3F820100]    <1>   	movzx	ebx, byte [SourceFile_LongNameEntryLength]  
  5061 00009872 E8E51A0000          <1>    	call	rename_directory_entry
  5062 00009877 E941F7FFFF          <1> 	jmp	loc_rename_file_ok	
  5063                              <1> ;loc_rename_file_ok:
  5064                              <1> ;	jc	loc_run_cmd_failed
  5065                              <1> ;	mov	esi, Msg_OK
  5066                              <1> ;	call	proc_printmsg
  5067                              <1> ;	jmp	loc_file_rw_restore_retn
  5068                              <1> 
  5069                              <1> move_file:
  5070                              <1> 	; 07/08/2022
  5071                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  5072                              <1> 	; 11/03/2016
  5073                              <1> 	; 09/03/2016
  5074                              <1> 	; 08/03/2016 (TRDOS 386 = TRDOS v2.0)
  5075                              <1> 	; 21/05/2011 (TRDOS v1, CMD_INTR.ASM, 'cmp_cmd_move')
  5076                              <1> 	; 23/04/2011
  5077                              <1> 
  5078                              <1> get_move_source_fchar:
  5079                              <1> 	; esi = file name
  5080 0000987C 803E20              <1> 	cmp	byte [esi], 20h
  5081 0000987F 7613                <1>         jna	short loc_move_nofilename_retn
  5082                              <1> 
  5083 00009881 8935[E8810100]      <1> 	mov	[SourceFilePath], esi
  5084                              <1> 
  5085                              <1> move_scan_source_file:
  5086 00009887 46                  <1> 	inc	esi
  5087 00009888 803E20              <1> 	cmp	byte [esi], 20h
  5088 0000988B 7408                <1>         je      short move_scan_destination_1
  5089                              <1> 	;;jb	short loc_move_nofilename_retn
  5090                              <1> 	;jb	loc_cmd_failed
  5091                              <1> 	;jmp	short move_scan_source_file
  5092                              <1> 	; 28/07/2022
  5093 0000988D 77F8                <1> 	ja	short move_scan_source_file
  5094                              <1> loc_move_failed:
  5095 0000988F E915EDFFFF          <1> 	jmp	loc_cmd_failed
  5096                              <1> 
  5097                              <1> loc_move_nofilename_retn:
  5098 00009894 C3                  <1> 	retn
  5099                              <1> 
  5100                              <1> move_scan_destination_1:
  5101 00009895 C60600              <1> 	mov	byte [esi], 0
  5102                              <1> 
  5103                              <1> move_scan_destination_2:
  5104 00009898 46                  <1> 	inc	esi  
  5105 00009899 803E20              <1> 	cmp	byte [esi], 20h
  5106 0000989C 74FA                <1> 	je	short move_scan_destination_2
  5107                              <1> 	;;jb	short loc_move_nofilename_retn
  5108                              <1> 	;jb	loc_cmd_failed
  5109                              <1> 	; 28/07/2022
  5110 0000989E 72EF                <1> 	jb	short loc_move_failed	
  5111                              <1> 
  5112 000098A0 8935[EC810100]      <1> 	mov	[DestinationFilePath], esi
  5113                              <1> 
  5114                              <1> move_scan_destination_3:
  5115 000098A6 46                  <1> 	inc	esi  
  5116 000098A7 803E20              <1> 	cmp	byte [esi], 20h
  5117 000098AA 77FA                <1> 	ja	short move_scan_destination_3
  5118 000098AC C60600              <1> 	mov	byte [esi], 0
  5119                              <1> 
  5120                              <1> loc_move_scan_destination_OK:
  5121 000098AF 8B35[E8810100]      <1> 	mov	esi, [SourceFilePath]
  5122 000098B5 8B3D[EC810100]      <1> 	mov	edi, [DestinationFilePath]
  5123                              <1> 
  5124 000098BB B001                <1> 	mov	al, 1  ; move procedure Phase 1
  5125 000098BD E8141B0000          <1> 	call	move_source_file_to_destination_file
  5126 000098C2 7325                <1> 	jnc	short move_source_file_to_destination_question
  5127                              <1> 
  5128                              <1> loc_move_cmd_failed_1:
  5129 000098C4 08C0                <1> 	or	al, al
  5130                              <1> 	;jz	loc_cmd_failed
  5131                              <1> 	; 28/07/2022
  5132 000098C6 74C7                <1> 	jz	short loc_move_failed
  5133                              <1>  
  5134 000098C8 3C11                <1> 	cmp	al, 11h
  5135 000098CA 7409                <1> 	je	short loc_msg_not_same_device   
  5136                              <1> 	;cmp	al, 05h
  5137                              <1> 	;cmp	al, ERR_PERM_DENIED ; 29/12/2017
  5138                              <1> 	;jne	loc_run_cmd_failed
  5139                              <1> 	;jmp	loc_permission_denied
  5140 000098CC 3C0B                <1> 	cmp	al, ERR_PERM_DENIED
  5141                              <1> 	;je	loc_permission_denied
  5142                              <1> 	; 28/07/2022
  5143 000098CE 7414                <1> 	je	short loc_move_perm_denied
  5144 000098D0 E9FFECFFFF          <1> 	jmp	loc_run_cmd_failed
  5145                              <1> 
  5146                              <1> 	;mov	esi, Msg_Permission_denied
  5147                              <1> 	;call	print_msg
  5148                              <1> 	;jmp	loc_file_rw_restore_retn
  5149                              <1> 
  5150                              <1> loc_msg_not_same_device:
  5151 000098D5 BE[35350100]        <1> 	mov	esi, msg_not_same_drv 
  5152 000098DA E8CBD3FFFF          <1> 	call	print_msg
  5153 000098DF E9C0F5FFFF          <1> 	jmp	loc_file_rw_restore_retn
  5154                              <1> 
  5155                              <1> 	; 28/07/2022
  5156                              <1> loc_move_perm_denied:
  5157 000098E4 E9C5F5FFFF          <1> 	jmp	loc_permission_denied	
  5158                              <1> 
  5159                              <1> move_source_file_to_destination_question:
  5160 000098E9 A0[F0810100]        <1>         mov     al, [SourceFile_Drv]
  5161 000098EE 0441                <1> 	add	al, 'A'
  5162 000098F0 A2[97350100]        <1> 	mov	[msg_source_file_drv], al
  5163 000098F5 A0[70820100]        <1>         mov     al, [DestinationFile_Drv]
  5164 000098FA 0441                <1> 	add	al, 'A'
  5165 000098FC A2[B6350100]        <1> 	mov	[msg_destination_file_drv], al
  5166                              <1> 
  5167 00009901 57                  <1> 	push	edi ; *
  5168                              <1> 
  5169 00009902 BE[7B350100]        <1> 	mov	esi, msg_source_file
  5170 00009907 E89ED3FFFF          <1> 	call	print_msg
  5171 0000990C BE[F1810100]        <1> 	mov	esi, SourceFile_Directory
  5172 00009911 803E20              <1> 	cmp	byte [esi], 20h
  5173 00009914 7605                <1> 	jna	short msftdfq_sfn
  5174 00009916 E88FD3FFFF          <1> 	call	print_msg
  5175                              <1> msftdfq_sfn:
  5176 0000991B BE[32820100]        <1> 	mov	esi, SourceFile_Name
  5177 00009920 E885D3FFFF          <1> 	call	print_msg
  5178 00009925 BE[9A350100]        <1> 	mov	esi, msg_destination_file
  5179 0000992A E87BD3FFFF          <1> 	call	print_msg
  5180 0000992F BE[71820100]        <1> 	mov	esi, DestinationFile_Directory
  5181 00009934 803E20              <1> 	cmp	byte [esi], 20h
  5182 00009937 7605                <1> 	jna	short msftdfq_dfn
  5183 00009939 E86CD3FFFF          <1> 	call	print_msg
  5184                              <1> msftdfq_dfn:
  5185 0000993E BE[B2820100]        <1> 	mov	esi, DestinationFile_Name
  5186 00009943 E862D3FFFF          <1> 	call	print_msg
  5187 00009948 BE[B9350100]        <1> 	mov	esi, msg_copy_nextline
  5188 0000994D E858D3FFFF          <1> 	call	print_msg
  5189 00009952 BE[B9350100]        <1> 	mov	esi, msg_copy_nextline
  5190 00009957 E84ED3FFFF          <1> 	call	print_msg
  5191                              <1> 
  5192                              <1> loc_move_ask_for_new_file_yes_no:
  5193 0000995C BE[47350100]        <1> 	mov	esi, Msg_DoYouWantMoveFile
  5194 00009961 E844D3FFFF          <1> 	call	print_msg
  5195 00009966 BE[4B340100]        <1> 	mov	esi, Msg_YesNo
  5196 0000996B E83AD3FFFF          <1> 	call	print_msg
  5197                              <1> loc_move_ask_for_new_file_again:
  5198 00009970 30E4                <1> 	xor	ah, ah
  5199 00009972 E88175FFFF          <1> 	call	int16h
  5200 00009977 3C1B                <1> 	cmp	al, 1Bh
  5201                              <1> 	;je	short loc_do_not_move_file
  5202 00009979 743F                <1> 	je	short loc_move_y_n_escape
  5203 0000997B 24DF                <1> 	and	al, 0DFh
  5204 0000997D A2[55340100]        <1>         mov     [Y_N_nextline], al
  5205 00009982 3C59                <1> 	cmp	al, 'Y'
  5206 00009984 7404                <1> 	je	short loc_yes_move_file
  5207 00009986 3C4E                <1> 	cmp	al, 'N'
  5208 00009988 75E6                <1> 	jne	short loc_move_ask_for_new_file_again
  5209                              <1> 
  5210                              <1> loc_do_not_move_file:
  5211                              <1> loc_yes_move_file:
  5212 0000998A E848F6FFFF          <1> 	call	y_n_answer ; 29/12/2017
  5213 0000998F 5F                  <1> 	pop	edi ; *
  5214                              <1> 	;cmp	al, 'Y' ; 'yes'
  5215                              <1> 	;cmc
  5216                              <1>         ;jnc	loc_file_rw_restore_retn
  5217 00009990 3C4E                <1> 	cmp	al, 'N' ; 'no'
  5218                              <1>         ;je	loc_file_rw_restore_retn
  5219                              <1> 	; 28/07/2022
  5220 00009992 7421                <1> 	je	short loc_move_rw_restore_retn
  5221                              <1> 
  5222                              <1> loc_move_yes_move_file:
  5223 00009994 B002                <1> 	mov	al, 2 ; move procedure Phase 2
  5224 00009996 E83B1A0000          <1> 	call	move_source_file_to_destination_file
  5225                              <1> 	;;jc	short loc_move_cmd_failed_2
  5226                              <1>         ;jnc	move_source_file_to_dest_OK
  5227                              <1> 	; 28/07/2022
  5228 0000999B 7205                <1> 	jc	short loc_move_cmd_failed_2
  5229                              <1> 	; 07/08/2022
  5230 0000999D E922F6FFFF          <1> 	jmp	move_source_file_to_dest_OK
  5231                              <1> 
  5232                              <1> ;move_source_file_to_destination_OK:
  5233                              <1> ;	mov	esi, Msg_OK
  5234                              <1> ;	call	print_msg
  5235                              <1> ;	jmp	loc_file_rw_restore_retn
  5236                              <1> 
  5237                              <1> loc_move_cmd_failed_2:
  5238 000099A2 3C27                <1> 	cmp	al, 27h
  5239                              <1> 	;jne	loc_run_cmd_failed
  5240                              <1> 	; 28/07/2022
  5241 000099A4 7405                <1> 	je	short loc_move_ids_err
  5242 000099A6 E929ECFFFF          <1> 	jmp	loc_run_cmd_failed
  5243                              <1> 
  5244                              <1> loc_move_ids_err: ; 28/07/2022
  5245 000099AB BE[60350100]        <1> 	mov	esi, msg_insufficient_disk_space
  5246 000099B0 E8F5D2FFFF          <1> 	call	print_msg
  5247                              <1> 
  5248                              <1> loc_move_rw_restore_retn: ; 28/07/2022 
  5249 000099B5 E9EAF4FFFF          <1> 	jmp	loc_file_rw_restore_retn
  5250                              <1> 
  5251                              <1> loc_move_y_n_escape:
  5252 000099BA B04E                <1> 	mov	al, 'N' ; 'no'
  5253 000099BC EBCC                <1> 	jmp	short loc_do_not_move_file
  5254                              <1> 
  5255                              <1> 
  5256                              <1> copy_file:
  5257                              <1> 	; 25/07/2022 - TRDOS 386 Kernel v2.0.5
  5258                              <1> 	; 15/10/2016
  5259                              <1> 	; 24/03/2016
  5260                              <1> 	; 21/03/2016
  5261                              <1> 	; 15/03/2016 (TRDOS 386 = TRDOS v2.0)
  5262                              <1> 	; 21/05/2011 (TRDOS v1, CMD_INTR.ASM, 'cmp_cmd_copy')
  5263                              <1> 	; 01/08/2010
  5264                              <1> 
  5265                              <1> get_copy_source_fchar:
  5266                              <1> 	; esi = file name
  5267 000099BE 803E20              <1> 	cmp	byte [esi], 20h
  5268 000099C1 7613                <1>         jna     short loc_copy_nofilename_retn
  5269                              <1> 
  5270 000099C3 8935[E8810100]      <1> 	mov	[SourceFilePath], esi
  5271                              <1> 
  5272                              <1> copy_scan_source_file:
  5273 000099C9 46                  <1> 	inc	esi  
  5274 000099CA 803E20              <1> 	cmp	byte [esi], 20h
  5275 000099CD 7408                <1> 	je	short copy_scan_destination_1
  5276                              <1> 	;;jb	short loc_copy_nofilename_retn
  5277                              <1> 	;jb	loc_cmd_failed
  5278                              <1> 	;jmp	short copy_scan_source_file
  5279                              <1> 	; 25/07/2022
  5280 000099CF 73F8                <1> 	jnb	short copy_scan_source_file
  5281                              <1> copy_scan_destination_0:
  5282 000099D1 E9D3EBFFFF          <1> 	jmp	loc_cmd_failed
  5283                              <1> 
  5284                              <1> loc_copy_nofilename_retn:
  5285 000099D6 C3                  <1> 	retn
  5286                              <1> 
  5287                              <1> copy_scan_destination_1:
  5288 000099D7 C60600              <1> 	mov	byte [esi], 0
  5289                              <1> 
  5290                              <1> copy_scan_destination_2:
  5291 000099DA 46                  <1> 	inc	esi  
  5292 000099DB 803E20              <1> 	cmp	byte [esi], 20h
  5293 000099DE 74FA                <1> 	je	short copy_scan_destination_2
  5294                              <1> 	;;jb	short loc_copy_nofilename_retn
  5295                              <1> 	;jb	loc_cmd_failed
  5296                              <1> 	; 25/07/2022
  5297 000099E0 72EF                <1> 	jb	short copy_scan_destination_0	
  5298                              <1> 
  5299 000099E2 8935[EC810100]      <1> 	mov	[DestinationFilePath], esi
  5300                              <1> 
  5301                              <1> copy_scan_destination_3:
  5302 000099E8 46                  <1> 	inc	esi  
  5303 000099E9 803E20              <1> 	cmp	byte [esi], 20h
  5304 000099EC 77FA                <1> 	ja	short copy_scan_destination_3
  5305 000099EE C60600              <1> 	mov	byte [esi], 0
  5306                              <1> 
  5307                              <1> loc_copy_save_current_drive:
  5308 000099F1 8A35[0A780100]      <1> 	mov	dh, [Current_Drv]
  5309 000099F7 8835[677F0100]      <1> 	mov	[RUN_CDRV], dh
  5310                              <1> 
  5311                              <1> copy_source_file_to_destination_phase_1:
  5312 000099FD 8B35[E8810100]      <1> 	mov	esi, [SourceFilePath]
  5313 00009A03 8B3D[EC810100]      <1> 	mov	edi, [DestinationFilePath]
  5314                              <1> 
  5315 00009A09 B001                <1> 	mov	al, 1  ; copy procedure Phase 1
  5316 00009A0B E85F1C0000          <1> 	call	copy_source_file_to_destination_file
  5317 00009A10 7327                <1> 	jnc	short copy_source_file_to_destination_question
  5318                              <1> 
  5319                              <1> loc_copy_cmd_failed_1:
  5320                              <1> 	; 18/03/2016 (restore current drive and directory)
  5321 00009A12 08C0                <1> 	or	al, al
  5322 00009A14 7507                <1> 	jnz	short loc_copy_cmd_failed_2
  5323                              <1> 
  5324 00009A16 FEC0                <1>         inc     al ; mov al, 1 ; Bad command or file name !
  5325                              <1> loc_copy_cmd_failed_3:	; 25/07/2022
  5326 00009A18 E9B7EBFFFF          <1> 	jmp	loc_run_cmd_failed
  5327                              <1> 
  5328                              <1> loc_copy_cmd_failed_2:
  5329 00009A1D 3C27                <1> 	cmp	al, 27h ; Insufficient disk space 
  5330 00009A1F 7409                <1> 	je	short loc_file_write_insuff_disk_space_msg
  5331                              <1>  
  5332                              <1> 	; 29/12/2017
  5333                              <1> 	;cmp	al, 05h
  5334 00009A21 3C0B                <1> 	cmp	al, ERR_PERM_DENIED
  5335                              <1> 	;jne	loc_run_cmd_failed
  5336                              <1> 	; 25/07/2022
  5337 00009A23 75F3                <1> 	jne	short loc_copy_cmd_failed_3
  5338                              <1> 	
  5339 00009A25 E984F4FFFF          <1> 	jmp	loc_permission_denied
  5340                              <1> 
  5341                              <1> loc_file_write_insuff_disk_space_msg:
  5342 00009A2A BE[60350100]        <1> 	mov	esi, msg_insufficient_disk_space
  5343 00009A2F E876D2FFFF          <1> 	call	print_msg
  5344 00009A34 E96BF4FFFF          <1>         jmp     loc_file_rw_restore_retn 
  5345                              <1> 
  5346                              <1> copy_source_file_to_destination_question:
  5347 00009A39 57                  <1> 	push	edi ; *
  5348                              <1> 
  5349                              <1> 	; dh = source file attributes
  5350                              <1> 	; dl > 0 -> destination file found
  5351 00009A3A 20D2                <1> 	and	dl, dl            
  5352 00009A3C 7446                <1> 	jz	short copy_source_file_to_destination_pass_owrq
  5353                              <1> 
  5354                              <1> loc_copy_ask_for_owr_yes_no:
  5355 00009A3E BE[BC350100]        <1> 	mov	esi, Msg_DoYouWantOverWriteFile
  5356 00009A43 E862D2FFFF          <1> 	call	print_msg
  5357 00009A48 BE[B2820100]        <1> 	mov	esi, DestinationFile_Name
  5358 00009A4D E858D2FFFF          <1> 	call	print_msg
  5359 00009A52 BE[4B340100]        <1> 	mov	esi, Msg_YesNo
  5360 00009A57 E84ED2FFFF          <1> 	call	print_msg
  5361                              <1> 
  5362                              <1> loc_copy_ask_for_owr_again:
  5363 00009A5C 30E4                <1> 	xor	ah, ah
  5364 00009A5E E89574FFFF          <1> 	call	int16h
  5365 00009A63 3C1B                <1> 	cmp	al, 1Bh
  5366                              <1>         ;je     loc_do_not_copy_file
  5367 00009A65 7419                <1>         je      short loc_copy_y_n_escape
  5368 00009A67 24DF                <1> 	and	al, 0DFh
  5369 00009A69 A2[55340100]        <1>         mov     [Y_N_nextline], al
  5370 00009A6E 3C59                <1> 	cmp	al, 'Y'
  5371                              <1> 	;je	loc_yes_copy_file
  5372                              <1> 	; 25/07/2022
  5373 00009A70 7505                <1> 	jne	short loc_copy_ask_for_owr_n
  5374 00009A72 E9AD000000          <1> 	jmp	loc_yes_copy_file
  5375                              <1> 
  5376                              <1> loc_copy_ask_for_owr_n: ; 25/07/2022
  5377 00009A77 3C4E                <1> 	cmp	al, 'N'
  5378                              <1>         ;je	loc_do_not_copy_file
  5379                              <1> 	;jmp	short loc_copy_ask_for_owr_again
  5380                              <1> 	; 25/07/2022
  5381 00009A79 75E1                <1> 	jne	short loc_copy_ask_for_owr_again
  5382                              <1> loc_do_not_copy_file_j:
  5383 00009A7B E9A4000000          <1> 	jmp	loc_do_not_copy_file
  5384                              <1> 
  5385                              <1> loc_copy_y_n_escape:
  5386 00009A80 B04E                <1> 	mov	al, 'N' ; 'no'
  5387                              <1> 	;jmp	loc_do_not_copy_file
  5388                              <1> 	; 25/07/2022
  5389 00009A82 EBF7                <1> 	jmp	short loc_do_not_copy_file_j
  5390                              <1> 
  5391                              <1> copy_source_file_to_destination_pass_owrq:
  5392 00009A84 A0[F0810100]        <1> 	mov     al, [SourceFile_Drv]
  5393 00009A89 0441                <1> 	add	al, 'A'
  5394 00009A8B A2[97350100]        <1> 	mov	[msg_source_file_drv], al
  5395 00009A90 A0[70820100]        <1>         mov     al, [DestinationFile_Drv]
  5396 00009A95 0441                <1> 	add	al, 'A'
  5397 00009A97 A2[B6350100]        <1> 	mov	[msg_destination_file_drv], al
  5398                              <1> 
  5399 00009A9C BE[7B350100]        <1> 	mov	esi, msg_source_file
  5400 00009AA1 E804D2FFFF          <1> 	call	print_msg
  5401 00009AA6 BE[F1810100]        <1> 	mov	esi, SourceFile_Directory
  5402 00009AAB 803E20              <1> 	cmp	byte [esi], 20h
  5403 00009AAE 7605                <1> 	jna	short csftdfq_sfn
  5404 00009AB0 E8F5D1FFFF          <1> 	call	print_msg
  5405                              <1> csftdfq_sfn:
  5406 00009AB5 BE[32820100]        <1> 	mov	esi, SourceFile_Name
  5407 00009ABA E8EBD1FFFF          <1> 	call	print_msg
  5408 00009ABF BE[9A350100]        <1> 	mov	esi, msg_destination_file
  5409 00009AC4 E8E1D1FFFF          <1> 	call	print_msg
  5410 00009AC9 BE[71820100]        <1> 	mov	esi, DestinationFile_Directory
  5411 00009ACE 803E20              <1> 	cmp	byte [esi], 20h
  5412 00009AD1 7605                <1> 	jna	short csftdfq_dfn
  5413 00009AD3 E8D2D1FFFF          <1> 	call	print_msg
  5414                              <1> csftdfq_dfn:
  5415 00009AD8 BE[B2820100]        <1> 	mov	esi, DestinationFile_Name
  5416 00009ADD E8C8D1FFFF          <1> 	call	print_msg
  5417 00009AE2 BE[B9350100]        <1> 	mov	esi, msg_copy_nextline
  5418 00009AE7 E8BED1FFFF          <1> 	call	print_msg
  5419 00009AEC BE[B9350100]        <1> 	mov	esi, msg_copy_nextline
  5420 00009AF1 E8B4D1FFFF          <1> 	call	print_msg
  5421                              <1> 
  5422                              <1> loc_copy_ask_for_new_file_yes_no:
  5423 00009AF6 BE[DB350100]        <1> 	mov	esi, Msg_DoYouWantCopyFile
  5424 00009AFB E8AAD1FFFF          <1> 	call	print_msg
  5425 00009B00 BE[4B340100]        <1> 	mov	esi, Msg_YesNo
  5426 00009B05 E8A0D1FFFF          <1> 	call	print_msg
  5427                              <1> 
  5428                              <1> loc_copy_ask_for_new_file_again:
  5429 00009B0A 30E4                <1> 	xor	ah, ah
  5430 00009B0C E8E773FFFF          <1> 	call	int16h
  5431 00009B11 3C1B                <1> 	cmp	al, 1Bh
  5432 00009B13 740F                <1> 	je	short loc_do_not_copy_file
  5433 00009B15 24DF                <1> 	and	al, 0DFh
  5434 00009B17 A2[55340100]        <1>         mov     [Y_N_nextline], al
  5435 00009B1C 3C59                <1> 	cmp	al, 'Y'
  5436 00009B1E 7404                <1> 	je	short loc_yes_copy_file
  5437 00009B20 3C4E                <1> 	cmp	al, 'N'
  5438 00009B22 75E6                <1> 	jne	short loc_copy_ask_for_new_file_again
  5439                              <1> 
  5440                              <1> loc_do_not_copy_file:
  5441                              <1> loc_yes_copy_file:
  5442 00009B24 E8AEF4FFFF          <1> 	call	y_n_answer ; 29/12/2017
  5443 00009B29 5F                  <1> 	pop	edi ; *
  5444                              <1> 	;cmp	al, 'Y' ; 'yes'
  5445                              <1> 	;cmc
  5446                              <1>         ;jnc	loc_file_rw_restore_retn
  5447 00009B2A 3C4E                <1> 	cmp	al, 'N' ; 'no'
  5448                              <1> 	;je	loc_file_rw_restore_retn
  5449                              <1> 	; 25/07/2022
  5450 00009B2C 7505                <1> 	jne	short copy_source_file_to_destination_pass_q
  5451 00009B2E E971F3FFFF          <1> 	jmp	loc_file_rw_restore_retn	
  5452                              <1> 
  5453                              <1> copy_source_file_to_destination_pass_q:
  5454 00009B33 B002                <1> 	mov	al, 2  ; copy procedure Phase 2
  5455 00009B35 E8351B0000          <1> 	call	copy_source_file_to_destination_file
  5456                              <1> 	;jc	short loc_file_write_check_disk_space_err
  5457                              <1> 
  5458                              <1> 	; 24/03/2016
  5459                              <1> 	;push	cx
  5460 00009B3A 51                  <1> 	push	ecx ; 29/12/2017
  5461 00009B3B BE[B9350100]        <1> 	mov	esi, msg_copy_nextline
  5462 00009B40 E865D1FFFF          <1> 	call	print_msg
  5463 00009B45 58                  <1> 	pop	eax ; 29/12/2017
  5464                              <1> 	;;pop	cx
  5465                              <1> 	;pop	ax
  5466                              <1> 
  5467                              <1> 	;or	cl, cl
  5468 00009B46 08C0                <1> 	or	al, al
  5469 00009B48 7419                <1> 	jz	short copy_source_file_to_destination_OK
  5470                              <1> 	
  5471                              <1> 	; 15/10/2016 (1Dh -> 18)
  5472                              <1> 	; 18/03/2016 (1Dh)
  5473                              <1> 	;cmp	cl, 18 ; write error
  5474 00009B4A 3C12                <1> 	cmp	al, 18
  5475 00009B4C 7506                <1> 	jne	short copy_source_file_to_destination_not_OK
  5476                              <1> 	;
  5477                              <1> 	;mov	al, cl ; error number (write fault!)
  5478 00009B4E F9                  <1> 	stc
  5479 00009B4F E950F3FFFF          <1> 	jmp	loc_file_rw_cmd_failed
  5480                              <1> 
  5481                              <1> copy_source_file_to_destination_not_OK:
  5482 00009B54 BE[F4350100]        <1> 	mov	esi, Msg_read_file_error_before_EOF
  5483 00009B59 E84CD1FFFF          <1> 	call	print_msg
  5484 00009B5E E941F3FFFF          <1> 	jmp	loc_file_rw_restore_retn	      
  5485                              <1>  
  5486                              <1> copy_source_file_to_destination_OK:
  5487 00009B63 BE[59340100]        <1> 	mov	esi, Msg_OK
  5488 00009B68 E83DD1FFFF          <1> 	call	print_msg
  5489                              <1> 
  5490 00009B6D E932F3FFFF          <1> 	jmp	loc_file_rw_restore_retn
  5491                              <1> 
  5492                              <1> ;loc_file_write_check_disk_space_err:
  5493                              <1> 	;cmp	al, 27h ; Insufficient disk space 
  5494                              <1> 	;je	loc_file_write_insuff_disk_space_msg
  5495                              <1>         ;jb	loc_file_rw_cmd_failed
  5496                              <1> 
  5497                              <1> 	;call	print_misc_error_msg ; 15/03/2016
  5498                              <1>         ;jmp	loc_file_rw_restore_retn 
  5499                              <1> 
  5500                              <1> change_fs_file_attributes:
  5501                              <1> 	; 04/03/2016 ; Temporary
  5502                              <1> 	; AL = File or directory attributes
  5503                              <1> 	; AH = 0 -> Attributes are in MS-DOS format
  5504                              <1> 	; AH > 0 -> Attributes are in SINGLIX format
  5505                              <1> 	;push	ebx
  5506                              <1> 	; ... do somethings here ...
  5507                              <1> 	;pop	ebx
  5508                              <1> 	; BL = File or directory attributes
  5509 00009B72 C3                  <1> 	retn
  5510                              <1> 
  5511                              <1> set_get_env:
  5512                              <1> 	; 25/07/2022 - TRDOS 386 Kernel v2.0.5
  5513                              <1> 	; 11/04/2016 (TRDOS 386 = TRDOS v2.0)
  5514                              <1> 	; 02/09/2011 (TRDOS v1, CMD_INTR.ASM, 'cmp_cmd_set')
  5515                              <1> 	; 2005 - 28/08/2011 
  5516                              <1> get_setenv_fchar:
  5517                              <1> 	; esi = environment variable/string
  5518 00009B73 8A06                <1> 	mov	al, [esi]
  5519 00009B75 3C20                <1> 	cmp	al, 20h
  5520 00009B77 771E                <1> 	ja	short loc_find_env
  5521                              <1> 
  5522 00009B79 BE00300900          <1> 	mov	esi, Env_Page
  5523                              <1> loc_print_setline:
  5524 00009B7E 803E00              <1> 	cmp	byte [esi], 0
  5525 00009B81 7613                <1> 	jna	short loc_setenv_retn
  5526 00009B83 E822D1FFFF          <1> 	call	print_msg
  5527 00009B88 56                  <1> 	push	esi
  5528 00009B89 BE[4B3A0100]        <1> 	mov	esi, nextline
  5529 00009B8E E817D1FFFF          <1> 	call	print_msg 
  5530 00009B93 5E                  <1> 	pop	esi
  5531 00009B94 EBE8                <1> 	jmp	short loc_print_setline   
  5532                              <1> 
  5533                              <1> loc_setenv_retn: 
  5534 00009B96 C3                  <1> 	retn
  5535                              <1> 
  5536                              <1> loc_find_env:
  5537 00009B97 3C3D                <1> 	cmp	al, '='
  5538                              <1> 	;je	loc_cmd_failed
  5539                              <1> 	; 25/07/2022
  5540 00009B99 7505                <1> 	jne	short loc_find_envr
  5541 00009B9B E909EAFFFF          <1> 	jmp	loc_cmd_failed
  5542                              <1> 
  5543                              <1> loc_find_envr:	; 25/07/2022
  5544 00009BA0 56                  <1> 	push	esi
  5545                              <1> loc_repeat_env_equal_check:
  5546 00009BA1 46                  <1> 	inc	esi
  5547 00009BA2 803E3D              <1> 	cmp	byte [esi], '='
  5548 00009BA5 7430                <1> 	je	short pass_env_equal_check
  5549 00009BA7 803E20              <1> 	cmp	byte [esi], 20h
  5550 00009BAA 73F5                <1> 	jnb	short loc_repeat_env_equal_check
  5551 00009BAC C60600              <1> 	mov	byte [esi], 0 
  5552 00009BAF 5E                  <1> 	pop	esi
  5553                              <1> 	; 25/07/2022 (*)
  5554                              <1> loc_print_env_string:
  5555 00009BB0 BF[0A790100]        <1> 	mov	edi, TextBuffer ; out buffer
  5556 00009BB5 B9FF000000          <1> 	mov	ecx, 255 ; maximum size (limit)
  5557 00009BBA 30C0                <1> 	xor	al, al ; 0 -> use [ESI]
  5558 00009BBC E877000000          <1> 	call	get_environment_string
  5559 00009BC1 72D3                <1> 	jc	short loc_setenv_retn
  5560                              <1> 	 ; 25/07/2022
  5561                              <1> ;loc_print_env_string:
  5562 00009BC3 BE[0A790100]        <1> 	mov	esi, TextBuffer
  5563 00009BC8 E8DDD0FFFF          <1> 	call	print_msg
  5564 00009BCD BE[4B3A0100]        <1> 	mov	esi, nextline
  5565                              <1> 	;call	print_msg
  5566                              <1> 	;retn
  5567                              <1> 	; 25/07/2022
  5568 00009BD2 E9D3D0FFFF          <1> 	jmp	print_msg
  5569                              <1>               
  5570                              <1> pass_env_equal_check:
  5571 00009BD7 46                  <1> 	inc	esi
  5572 00009BD8 803E20              <1> 	cmp	byte [esi], 20h
  5573 00009BDB 73FA                <1> 	jnb	short pass_env_equal_check
  5574 00009BDD C60600              <1> 	mov	byte [esi], 0	
  5575                              <1> 
  5576                              <1> loc_call_set_env_string:
  5577 00009BE0 5E                  <1> 	pop	esi
  5578 00009BE1 E815010000          <1> 	call	set_environment_string
  5579 00009BE6 73AE                <1> 	jnc	short loc_setenv_retn
  5580                              <1> 
  5581                              <1> loc_set_cmd_failed:
  5582 00009BE8 3C08                <1> 	cmp	al, 08h
  5583                              <1> 	;jne	loc_cmd_failed
  5584                              <1> 	; 25/07/2022
  5585 00009BEA 7405                <1> 	je	short loc_set_cmd_failed_spc
  5586 00009BEC E9B8E9FFFF          <1> 	jmp	loc_cmd_failed
  5587                              <1> 
  5588                              <1> loc_set_cmd_failed_spc:
  5589 00009BF1 BE[34360100]        <1> 	mov	esi, Msg_No_Set_Space
  5590                              <1> 	;call	print_msg
  5591                              <1> 	;retn
  5592                              <1> 	; 25/07/2022
  5593 00009BF6 E9AFD0FFFF          <1> 	jmp	print_msg
  5594                              <1> 
  5595                              <1> set_get_path:
  5596                              <1> 	; 25/07/2022 - TRDOS 386 Kernel v2.0.5
  5597                              <1> 	; 11/04/2016 (TRDOS 386 = TRDOS v2.0)
  5598                              <1> 	; 03/09/2011 (TRDOS v1, CMD_INTR.ASM, 'cmp_cmd_path')
  5599                              <1> 	; 2005
  5600                              <1> get_path_fchar:
  5601                              <1>  	; esi = path
  5602 00009BFB 803E20              <1> 	cmp	byte [esi], 20h
  5603 00009BFE 7711                <1> 	ja	short loc_set_path
  5604                              <1> 
  5605 00009C00 BE00300900          <1> 	mov	esi, Env_Page
  5606                              <1> loc_print_path:
  5607 00009C05 803E00              <1> 	cmp	byte [esi], 0
  5608 00009C08 762D                <1> 	jna	short loc_path_retn
  5609                              <1> 
  5610 00009C0A BE[93300100]        <1> 	mov	esi, Cmd_Path ; 'PATH' address
  5611                              <1> 	; 25/07/2022 (*)
  5612 00009C0F EB9F                <1> 	jmp	short loc_print_env_string
  5613                              <1> ; 25/07/2022
  5614                              <1> ;	mov	edi, TextBuffer ; out buffer
  5615                              <1> ;	xor	al, al  ; use [ESI]
  5616                              <1> ;	mov	ecx, 255 ; maximum size (limit)
  5617                              <1> ;	call	get_environment_string
  5618                              <1> ;	;jc	short loc_path_retn
  5619                              <1> ;	; 25/07/2022
  5620                              <1> ;	jnc	short loc_print_env_string
  5621                              <1> ;	retn
  5622                              <1> 
  5623                              <1> ;	mov	esi, TextBuffer
  5624                              <1> ;	call	print_msg
  5625                              <1> ;	mov	esi, nextline
  5626                              <1> ;	;call	print_msg
  5627                              <1> ;loc_path_retn: 
  5628                              <1> ;	;retn
  5629                              <1> ;	; 25/07/2022
  5630                              <1> ;	jmp	print_msg
  5631                              <1> 
  5632                              <1> loc_set_path:
  5633 00009C11 56                  <1> 	push	esi 
  5634                              <1> loc_set_path_find_end:
  5635 00009C12 46                  <1> 	inc	esi
  5636 00009C13 803E20              <1> 	cmp	byte [esi], 20h
  5637 00009C16 73FA                <1> 	jnb	short loc_set_path_find_end
  5638 00009C18 C60600              <1> 	mov	byte [esi], 0 
  5639                              <1> loc_set_path_header: 
  5640 00009C1B 5E                  <1> 	pop	esi
  5641                              <1> set_path_x: ; 31/12/2017 ('syspath')	  
  5642 00009C1C 4E                  <1> 	dec	esi
  5643 00009C1D C6063D              <1> 	mov	byte [esi], '='
  5644 00009C20 4E                  <1> 	dec	esi
  5645 00009C21 C60648              <1> 	mov	byte [esi], 'H'
  5646 00009C24 4E                  <1> 	dec	esi
  5647 00009C25 C60654              <1> 	mov	byte [esi], 'T'
  5648 00009C28 4E                  <1> 	dec	esi
  5649 00009C29 C60641              <1> 	mov	byte [esi], 'A'
  5650 00009C2C 4E                  <1> 	dec	esi
  5651 00009C2D C60650              <1> 	mov	byte [esi], 'P'   
  5652                              <1> 
  5653                              <1> loc_path_call_set_env_string:
  5654 00009C30 E8C6000000          <1> 	call	set_environment_string
  5655 00009C35 72B1                <1>         jc	short loc_set_cmd_failed
  5656                              <1> loc_path_retn:	; 25/07/2022
  5657 00009C37 C3                  <1> 	retn              
  5658                              <1> 
  5659                              <1> get_environment_string:
  5660                              <1> 	; 12/04/2016
  5661                              <1> 	; 11/04/2016
  5662                              <1> 	; 05/04/2016 (TRDOS 386 = TRDOS v2.0)
  5663                              <1> 	; 02/09/2011 (TRDOS v1, MAINPROG.ASM)
  5664                              <1> 	; 28/08/2011
  5665                              <1> 	; INPUT->
  5666                              <1> 	;	EDI = Output buffer
  5667                              <1> 	;	CX = Buffer length (<= ENV_PAGE_SIZE)
  5668                              <1> 	;
  5669                              <1> 	;	AL > 0 = AL = String sequence number
  5670                              <1> 	;	AL = 0 -> ESI = ASCIIZ Set word 
  5671                              <1> 	;		(environment variable)
  5672                              <1> 	; OUTPUT ->
  5673                              <1> 	;	ESI is not changed
  5674                              <1> 	;	EDI is not changed
  5675                              <1> 	;	EAX = String length (with zero tail)
  5676                              <1> 	;	EDX = Environment variables page address
  5677                              <1> 	;	CF = 1 -> Not found (EAX not valid)
  5678                              <1> 	;
  5679                              <1> 	; (Modified registers: EAX, EDX) 
  5680                              <1> 
  5681 00009C38 BA00300900          <1> 	mov	edx, Env_Page
  5682 00009C3D 803A00              <1> 	cmp	byte [edx], 0
  5683 00009C40 7474                <1> 	jz	short get_env_string_with_word_stc_retn
  5684                              <1> 
  5685 00009C42 66890D[74830100]    <1> 	mov	[env_var_length], cx
  5686                              <1> 
  5687 00009C49 51                  <1> 	push	ecx ; *
  5688 00009C4A 56                  <1> 	push	esi ; **
  5689                              <1> 
  5690 00009C4B 08C0                <1> 	or	al, al
  5691 00009C4D 7449                <1> 	jz	short get_env_string_with_word
  5692                              <1> 
  5693                              <1> get_env_string_with_seq_number:
  5694 00009C4F B101                <1> 	mov	cl, 1
  5695 00009C51 88C5                <1> 	mov	ch, al
  5696 00009C53 31C0                <1> 	xor	eax, eax
  5697 00009C55 89D6                <1> 	mov	esi, edx ; Env_Page
  5698                              <1> 
  5699                              <1> get_env_string_seq_number_check:
  5700 00009C57 38CD                <1> 	cmp	ch, cl
  5701 00009C59 7726                <1> 	ja	short get_env_string_seq_number_next
  5702                              <1> 
  5703                              <1> get_env_string_move_to_buff:
  5704 00009C5B 57                  <1> 	push	edi ; ***
  5705                              <1> 
  5706 00009C5C 29D2                <1> 	sub	edx, edx
  5707                              <1> 
  5708                              <1> get_env_string_seq_number_repeat1:
  5709 00009C5E 42                  <1> 	inc	edx
  5710 00009C5F AC                  <1> 	lodsb
  5711 00009C60 AA                  <1> 	stosb
  5712                              <1> 
  5713 00009C61 66FF0D[74830100]    <1> 	dec	word [env_var_length]
  5714 00009C68 7508                <1> 	jnz	short get_env_string_seq_number_repeat3
  5715                              <1> 
  5716                              <1> get_env_string_seq_number_repeat2:
  5717 00009C6A 20C0                <1> 	and	al, al
  5718 00009C6C 7408                <1> 	jz	short get_env_string_seq_number_ok
  5719 00009C6E 42                  <1> 	inc	edx
  5720 00009C6F AC                  <1> 	lodsb
  5721 00009C70 EBF8                <1> 	jmp	short get_env_string_seq_number_repeat2
  5722                              <1> 
  5723                              <1> get_env_string_seq_number_repeat3:
  5724 00009C72 08C0                <1> 	or	al, al
  5725 00009C74 75E8                <1> 	jnz	short get_env_string_seq_number_repeat1
  5726                              <1> 
  5727                              <1> get_env_string_seq_number_ok:
  5728 00009C76 5F                  <1> 	pop	edi ; ***
  5729 00009C77 89D0                <1> 	mov	eax, edx ; Length of the environment string
  5730                              <1> 			 ; (ASCIIZ, includes ZERO tail)
  5731 00009C79 BA00300900          <1> 	mov	edx, Env_Page
  5732                              <1> 
  5733                              <1> get_env_string_stc_retn:
  5734 00009C7E 5E                  <1> 	pop	esi ; **
  5735 00009C7F 59                  <1> 	pop	ecx ; *
  5736 00009C80 C3                  <1> 	retn   
  5737                              <1> 	
  5738                              <1> get_env_string_seq_number_next:
  5739 00009C81 AC                  <1> 	lodsb
  5740 00009C82 08C0                <1> 	or	al, al
  5741 00009C84 75FB                <1> 	jnz	short get_env_string_seq_number_next
  5742                              <1> 
  5743 00009C86 81FE00320900        <1> 	cmp	esi, Env_Page + Env_Page_Size ; +512 (+4096)
  5744 00009C8C F5                  <1> 	cmc
  5745 00009C8D 72EF                <1> 	jc	short get_env_string_stc_retn
  5746                              <1> 
  5747 00009C8F AC                  <1> 	lodsb
  5748 00009C90 3C01                <1> 	cmp	al, 1
  5749 00009C92 72EA                <1> 	jb	short get_env_string_stc_retn
  5750 00009C94 FEC1                <1> 	inc	cl
  5751 00009C96 EBBF                <1> 	jmp	short get_env_string_seq_number_check
  5752                              <1> 
  5753                              <1> get_env_string_with_word:
  5754 00009C98 31C9                <1> 	xor	ecx, ecx
  5755                              <1> 
  5756                              <1> get_env_string_calc_word_length:
  5757 00009C9A AC                  <1> 	lodsb 
  5758 00009C9B 3C20                <1> 	cmp	al, 20h
  5759 00009C9D 7211                <1> 	jb	short get_env_string_calc_word_length_ok
  5760                              <1> 	;inc	cx
  5761 00009C9F FEC1                <1> 	inc	cl
  5762                              <1> 
  5763 00009CA1 3C61                <1> 	cmp	al, 'a'
  5764 00009CA3 72F5                <1> 	jb	short get_env_string_calc_word_length
  5765 00009CA5 3C7A                <1> 	cmp	al, 'z'
  5766 00009CA7 77F1                <1> 	ja	short get_env_string_calc_word_length
  5767 00009CA9 24DF                <1> 	and	al, 0DFh
  5768 00009CAB 8846FF              <1> 	mov	[esi-1], al
  5769 00009CAE EBEA                <1> 	jmp	short get_env_string_calc_word_length
  5770                              <1> 	
  5771                              <1> get_env_string_calc_word_length_ok:
  5772 00009CB0 08C9                <1> 	or	cl, cl
  5773 00009CB2 7506                <1> 	jnz	short get_env_string_calc_word_length_save
  5774                              <1>      
  5775 00009CB4 5E                  <1> 	pop	esi ; **
  5776                              <1> 
  5777                              <1> get_env_string_stc_retn1:
  5778 00009CB5 59                  <1> 	pop	ecx ; *
  5779                              <1>         
  5780                              <1> get_env_string_with_word_stc_retn:
  5781 00009CB6 31C0                <1> 	xor	eax, eax  
  5782 00009CB8 F9                  <1> 	stc
  5783 00009CB9 C3                  <1> 	retn
  5784                              <1>   
  5785                              <1> get_env_string_calc_word_length_save:
  5786 00009CBA 871C24              <1> 	xchg	ebx, [esp] ; **
  5787 00009CBD 89DE                <1> 	mov	esi, ebx 
  5788                              <1> 		; Start of the env string (to be searched)
  5789                              <1> 
  5790 00009CBF 57                  <1> 	push	edi ; ***
  5791 00009CC0 89D7                <1> 	mov	edi, edx ; Env_Page
  5792                              <1> 
  5793                              <1> get_env_string_compare:
  5794 00009CC2 57                  <1> 	push	edi ; ****
  5795 00009CC3 51                  <1> 	push	ecx ; ***** ; Variable name length
  5796                              <1> 
  5797                              <1> get_env_string_compare_rep:
  5798 00009CC4 AC                  <1> 	lodsb
  5799 00009CC5 AE                  <1> 	scasb
  5800 00009CC6 7511                <1> 	jne	short get_env_string_compare_next1
  5801 00009CC8 E2FA                <1> 	loop	get_env_string_compare_rep
  5802                              <1> 	
  5803 00009CCA 803F3D              <1> 	cmp	byte [edi], '='
  5804 00009CCD 750A                <1> 	jne	short get_env_string_compare_next1
  5805                              <1>  
  5806 00009CCF 59                  <1> 	pop	ecx ; *****
  5807 00009CD0 5F                  <1> 	pop	edi ; ****
  5808 00009CD1 89FE                <1> 	mov	esi, edi
  5809 00009CD3 5F                  <1> 	pop	edi ; ***
  5810 00009CD4 871C24              <1> 	xchg	ebx, [esp] ; **
  5811 00009CD7 EB82                <1> 	jmp	short get_env_string_move_to_buff
  5812                              <1> 
  5813                              <1> get_env_string_compare_next1:
  5814 00009CD9 89FE                <1> 	mov	esi, edi
  5815 00009CDB 59                  <1> 	pop	ecx ; *****
  5816 00009CDC 5F                  <1> 	pop	edi ; ****
  5817                              <1> get_env_string_compare_next2:
  5818 00009CDD 81FEFF310900        <1> 	cmp	esi, Env_Page + Env_Page_Size - 1 ; +511 (+4095)
  5819 00009CE3 7310                <1> 	jnb	short get_env_string_compare_not_ok
  5820 00009CE5 20C0                <1> 	and	al, al
  5821 00009CE7 AC                  <1> 	lodsb
  5822 00009CE8 75F3                <1> 	jnz	short get_env_string_compare_next2
  5823 00009CEA 08C0                <1> 	or	al, al
  5824 00009CEC 7407                <1> 	jz	short get_env_string_compare_not_ok
  5825 00009CEE 4E                  <1> 	dec	esi ; 12/04/2016
  5826 00009CEF 89F7                <1> 	mov	edi, esi
  5827 00009CF1 89DE                <1> 	mov	esi, ebx
  5828 00009CF3 EBCD                <1> 	jmp	short get_env_string_compare
  5829                              <1> 
  5830                              <1> get_env_string_compare_not_ok:
  5831 00009CF5 5F                  <1> 	pop	edi ; ***
  5832 00009CF6 89DE                <1> 	mov	esi, ebx
  5833 00009CF8 5B                  <1> 	pop	ebx ; **
  5834 00009CF9 EBBA                <1> 	jmp	short get_env_string_stc_retn1
  5835                              <1> 
  5836                              <1> set_environment_string:
  5837                              <1> 	; 25/07/2022 - TRDOS 386 Kernel v2.0.5
  5838                              <1> 	; 13/04/2016
  5839                              <1> 	; 12/04/2016
  5840                              <1> 	; 11/04/2016
  5841                              <1> 	; 06/04/2016
  5842                              <1> 	; 05/04/2016 (TRDOS 386 = TRDOS v2.0)
  5843                              <1> 	; 02/09/2011 (TRDOS v1, MAINPROG.ASM)
  5844                              <1> 	; 29/08/2011
  5845                              <1> 	; 29/08/2011
  5846                              <1> 	; INPUT->
  5847                              <1> 	;	ESI = ASCIIZ environment string
  5848                              <1> 	; OUTPUT ->
  5849                              <1> 	;	ESI is not changed
  5850                              <1> 	;	CF = 1 -> Could not set, 
  5851                              <1> 	;	     insufficient environment space
  5852                              <1> 	;
  5853                              <1> 	; (EAX, EDX will be changed) 
  5854                              <1> 	;
  5855                              <1> 	;    (EAX = Start address of the env string if > 0)	
  5856                              <1> 	;    (EDX = Environment string length)	
  5857                              <1> 
  5858 00009CFB 56                  <1> 	push 	esi ; *
  5859                              <1> 
  5860 00009CFC 31C0                <1> 	xor	eax, eax
  5861                              <1> 
  5862                              <1> set_env_chk_validation1:
  5863 00009CFE FEC4                <1> 	inc	ah ; variable (string) length
  5864 00009D00 AC                  <1> 	lodsb
  5865 00009D01 3C3D                <1> 	cmp	al, '='
  5866 00009D03 7415                <1> 	je	short set_env_chk_validation2
  5867 00009D05 3C20                <1> 	cmp	al, 20h
  5868 00009D07 720F                <1> 	jb	short set_env_string_stc
  5869                              <1> 
  5870                              <1> 	; 06/04/2016
  5871 00009D09 3C61                <1> 	cmp	al, 'a'
  5872 00009D0B 72F1                <1> 	jb	short set_env_chk_validation1
  5873 00009D0D 3C7A                <1> 	cmp	al, 'z'
  5874 00009D0F 77ED                <1> 	ja	short set_env_chk_validation1
  5875 00009D11 2C20                <1> 	sub	al, 'a'-'A'
  5876 00009D13 8846FF              <1> 	mov	[esi-1], al
  5877 00009D16 EBE6                <1> 	jmp	short set_env_chk_validation1
  5878                              <1> 
  5879                              <1> set_env_string_stc:
  5880 00009D18 5E                  <1> 	pop	esi ; *
  5881                              <1> 	;stc
  5882 00009D19 C3                  <1> 	retn 
  5883                              <1> 	   
  5884                              <1> set_env_chk_validation2:
  5885 00009D1A 51                  <1> 	push	ecx ; **
  5886 00009D1B 53                  <1> 	push	ebx ; *** 
  5887 00009D1C 57                  <1> 	push	edi ; ****
  5888                              <1> 
  5889                              <1> 	; 12/04/2016
  5890                              <1> 	;mov	ebx, [esp+12]
  5891                              <1> 	; 25/07/2022
  5892 00009D1D 8B54240C            <1> 	mov	edx, [esp+12]
  5893                              <1> 
  5894                              <1> set_env_chk_validation2w:
  5895 00009D21 89F7                <1> 	mov	edi, esi
  5896 00009D23 4F                  <1> 	dec	edi
  5897                              <1> 
  5898 00009D24 807FFF20            <1> 	cmp	byte [edi-1], 20h
  5899 00009D28 771A                <1> 	ja	short set_env_chk_validation2z
  5900                              <1> 	
  5901 00009D2A 56                  <1> 	push	esi
  5902 00009D2B 89FE                <1> 	mov	esi, edi
  5903 00009D2D 4E                  <1> 	dec	esi
  5904                              <1> 
  5905                              <1> set_env_chk_validation2x:
  5906 00009D2E 4E                  <1> 	dec	esi
  5907                              <1> 
  5908                              <1> 	;cmp	esi, ebx
  5909 00009D2F 39D6                <1> 	cmp	esi, edx ; 25/07/2022
  5910 00009D31 7207                <1> 	jb	short set_env_chk_validation2y
  5911                              <1> 
  5912 00009D33 4F                  <1> 	dec	edi
  5913                              <1> 
  5914 00009D34 8A06                <1> 	mov	al, [esi]
  5915 00009D36 8807                <1> 	mov	[edi], al
  5916                              <1> 
  5917 00009D38 EBF4                <1> 	jmp	short set_env_chk_validation2x
  5918                              <1> 
  5919                              <1> set_env_chk_validation2y:
  5920 00009D3A 5E                  <1> 	pop	esi
  5921                              <1> 
  5922                              <1> 	;;mov	byte [ebx], 20h
  5923                              <1> 	; 25/07/2022
  5924                              <1> 	;mov	byte [edx], 20h		
  5925                              <1> 
  5926                              <1> 	;inc 	ebx
  5927                              <1> 	;mov	[esp+12], ebx
  5928                              <1> 	; 25/07/2022
  5929 00009D3B 42                  <1> 	inc	edx
  5930 00009D3C 8954240C            <1> 	mov	[esp+12], edx
  5931                              <1> 
  5932 00009D40 FECC                <1> 	dec 	ah ; 13/04/2016
  5933                              <1> 
  5934 00009D42 EBDD                <1> 	jmp	short set_env_chk_validation2w
  5935                              <1> 	
  5936                              <1> set_env_chk_validation2z:	
  5937                              <1> 	;mov	edx, Env_Page
  5938                              <1> 	;mov	edi, edx
  5939                              <1> 	; 25/07/2022
  5940 00009D44 BB00300900          <1> 	mov	ebx, Env_Page
  5941 00009D49 89DF                <1> 	mov	edi, ebx
  5942                              <1> 
  5943                              <1> set_env_chk_validation3:
  5944 00009D4B AC                  <1> 	lodsb
  5945 00009D4C 3C20                <1> 	cmp	al, 20h
  5946 00009D4E 74FB                <1> 	je	short set_env_chk_validation3
  5947                              <1> 
  5948 00009D50 9C                  <1> 	pushf
  5949                              <1> 
  5950                              <1> 	; 12/04/2016
  5951                              <1> set_env_chk_validation3n:
  5952 00009D51 3C61                <1> 	cmp	al, 'a'
  5953 00009D53 720C                <1> 	jb	short set_env_chk_validation3c
  5954 00009D55 3C7A                <1> 	cmp	al, 'z'
  5955 00009D57 7705                <1> 	ja	short set_env_chk_validation3x
  5956 00009D59 2C20                <1> 	sub	al, 'a'-'A'
  5957 00009D5B 8846FF              <1> 	mov	[esi-1], al
  5958                              <1> 
  5959                              <1> set_env_chk_validation3x:
  5960 00009D5E AC                  <1> 	lodsb
  5961 00009D5F EBF0                <1> 	jmp	short set_env_chk_validation3n
  5962                              <1> 
  5963                              <1> set_env_chk_validation3c:
  5964 00009D61 3C20                <1> 	cmp	al, 20h
  5965 00009D63 73F9                <1> 	jnb	short set_env_chk_validation3x
  5966                              <1> 		
  5967 00009D65 803F00              <1> 	cmp	byte [edi], 0
  5968 00009D68 772B                <1> 	ja	short set_env_chk_validation4
  5969                              <1> 
  5970 00009D6A 9D                  <1> 	popf
  5971 00009D6B 7222                <1> 	jb	short set_env_string_nothing
  5972                              <1> 
  5973 00009D6D B900020000          <1> 	mov	ecx, Env_Page_Size ; 512 (4096)
  5974                              <1> 
  5975                              <1> 	;mov	esi, ebx ; 12/04/2016
  5976                              <1> 	; 25/07/2022
  5977 00009D72 89D6                <1> 	mov	esi, edx
  5978                              <1> 
  5979                              <1> 	; 25/07/2022
  5980 00009D74 89CA                <1> 	mov	edx, ecx
  5981                              <1> 
  5982                              <1> set_env_string_copy_to_envb:
  5983 00009D76 AC                  <1> 	lodsb
  5984 00009D77 3C20                <1> 	cmp	al, 20h
  5985 00009D79 7207                <1> 	jb	short set_env_string_copy_to_envb_z
  5986 00009D7B AA                  <1> 	stosb
  5987 00009D7C E2F8                <1> 	loop	set_env_string_copy_to_envb
  5988                              <1> 
  5989                              <1> 	; 11/04/2016
  5990                              <1> 	;mov	edi, edx ; Env_Page
  5991                              <1> 	; 25/07/2022
  5992 00009D7E 89DF                <1> 	mov	edi, ebx
  5993                              <1> 	; 25/07/2022
  5994                              <1> 	;mov	ecx, Env_Page_Size 
  5995 00009D80 89D1                <1> 	mov	ecx, edx
  5996                              <1> 
  5997                              <1> set_env_string_copy_to_envb_z:
  5998                              <1> 	; 25/07/2022
  5999                              <1> 	;push	edx  ; Start address of the variable
  6000                              <1> 	
  6001                              <1> 	;;mov	edx, Env_Page_Size
  6002                              <1> 	;; 25/07/2022
  6003 00009D82 29CA                <1> 	sub	edx, ecx ; variable (string) length
  6004                              <1> 
  6005 00009D84 28C0                <1> 	sub	al, al ; 0
  6006 00009D86 F3AA                <1>  	rep	stosb ; clear remain bytes of the env page
  6007                              <1> 
  6008                              <1> 	;pop	eax  ; Start address of the variable
  6009                              <1> 	; 25/07/2022
  6010 00009D88 89D8                <1> 	mov	eax, ebx
  6011                              <1> 
  6012                              <1> set_env_string_allocate_envb_retn:  ; stc or clc return
  6013 00009D8A 5F                  <1> 	pop	edi ; ****
  6014 00009D8B 5B                  <1> 	pop	ebx ; ***
  6015 00009D8C 59                  <1> 	pop	ecx ; **
  6016 00009D8D 5E                  <1> 	pop	esi ; *	
  6017 00009D8E C3                  <1> 	retn
  6018                              <1> 
  6019                              <1> set_env_string_nothing:
  6020 00009D8F 31C0                <1> 	xor	eax, eax
  6021 00009D91 31D2                <1> 	xor	edx, edx ; 11/04/2016
  6022 00009D93 EBF5                <1> 	jmp	short set_env_string_allocate_envb_retn
  6023                              <1> 
  6024                              <1> set_env_chk_validation4:
  6025                              <1> 	; 11/04/2016
  6026 00009D95 9D                  <1> 	popf
  6027                              <1> 
  6028                              <1> 	;mov	esi, edx  ; Env_Page
  6029                              <1> 	; 25/07/2022
  6030 00009D96 89DE                <1> 	mov	esi, ebx
  6031                              <1> 
  6032                              <1> set_env_chk_validation5:	
  6033                              <1> 	;mov	edi, ebx  ; ASCIIZ environment string address	
  6034                              <1> 	; 25/07/2022
  6035 00009D98 89D7                <1> 	mov	edi, edx
  6036 00009D9A 0FB6CC              <1> 	movzx	ecx, ah ; Variable (string) length (with '=')
  6037                              <1> 
  6038                              <1> set_env_chk_validation5_loop:
  6039 00009D9D AC                  <1> 	lodsb
  6040 00009D9E AE                  <1> 	scasb
  6041 00009D9F 7508                <1> 	jne	short set_env_chk_validation6
  6042 00009DA1 E2FA                <1> 	loop	set_env_chk_validation5_loop
  6043                              <1> 
  6044 00009DA3 3C3D                <1> 	cmp	al, '='
  6045                              <1>         ;je	set_env_change_variable
  6046                              <1> 	; 25/07/2022
  6047 00009DA5 7502                <1> 	jne	short set_env_chk_validation6
  6048 00009DA7 EB7E                <1> 	jmp	set_env_change_variable
  6049                              <1> 
  6050                              <1> set_env_chk_validation6:
  6051 00009DA9 08C0                <1> 	or	al, al ; 0
  6052 00009DAB 7403                <1> 	jz	short set_env_chk_validation7
  6053                              <1> 
  6054 00009DAD AC                  <1> 	lodsb
  6055 00009DAE EBF9                <1> 	jmp	short set_env_chk_validation6
  6056                              <1> 
  6057                              <1> set_env_chk_validation7:
  6058 00009DB0 88E1                <1> 	mov	cl, ah
  6059 00009DB2 01F1                <1> 	add	ecx, esi
  6060 00009DB4 81F9FF310900        <1> 	cmp	ecx, Env_Page + Env_Page_Size - 1 
  6061                              <1> 		; 511 (4095) 
  6062                              <1> 		; strlen + '=' + 0
  6063 00009DBA 72DC                <1> 	jb	short set_env_chk_validation5
  6064                              <1> 
  6065                              <1> set_env_chk_validation8: ; variable not found
  6066 00009DBC 0FB6F4              <1> 	movzx	esi, ah  ; variable name length (with '=') 
  6067                              <1> 	;add	esi, ebx ; position just after of the '='
  6068                              <1> 	; 25/07/2022
  6069 00009DBF 01D6                <1> 	add	esi, edx
  6070                              <1> 
  6071                              <1> set_env_chk_validation8_loop:
  6072 00009DC1 AC                  <1> 	lodsb
  6073 00009DC2 3C20                <1> 	cmp	al, 20h
  6074 00009DC4 74FB                <1> 	je	short set_env_chk_validation8_loop	
  6075 00009DC6 72C7                <1> 	jb	short set_env_string_nothing
  6076                              <1> 
  6077                              <1> set_env_chk_validation9:
  6078 00009DC8 AC                  <1> 	lodsb
  6079 00009DC9 3C20                <1> 	cmp	al, 20h
  6080 00009DCB 73FB                <1> 	jnb	short set_env_chk_validation9
  6081                              <1> 
  6082                              <1> 	; End of ASCIIZ environment string
  6083                              <1> 
  6084                              <1> set_env_add_variable:
  6085                              <1> 	;sub	esi, ebx ; variable+definition length
  6086                              <1> 	; 25/07/2022
  6087 00009DCD 29D6                <1> 	sub	esi, edx	
  6088                              <1> 
  6089 00009DCF 56                  <1> 	push	esi ; *****
  6090                              <1> 
  6091                              <1> 	;mov	esi, edx ; Environment page address
  6092                              <1> 	; 25/07/2022
  6093 00009DD0 89DE                <1> 	mov	esi, ebx
  6094                              <1> 
  6095 00009DD2 B900020000          <1> 	mov	ecx, Env_Page_Size ; 512 (4096)	
  6096                              <1> 
  6097                              <1> set_env_add_variable_loop:
  6098 00009DD7 AC                  <1> 	lodsb
  6099 00009DD8 20C0                <1> 	and	al, al		
  6100 00009DDA 7406                <1> 	jz	short set_env_add_variable_chk1 ; 0
  6101 00009DDC E2F9                <1> 	loop	set_env_add_variable_loop
  6102                              <1> 
  6103                              <1> 	; 11/04/2016
  6104 00009DDE 884EFF              <1> 	mov	[esi-1], cl ; 0
  6105 00009DE1 41                  <1> 	inc	ecx
  6106                              <1> 	
  6107                              <1> set_env_add_variable_chk1: 
  6108 00009DE2 49                  <1> 	dec	ecx
  6109 00009DE3 7408                <1> 	jz	short set_env_add_variable_nspc
  6110 00009DE5 AC                  <1> 	lodsb
  6111 00009DE6 08C0                <1> 	or 	al, al
  6112 00009DE8 740B                <1> 	jz	short set_env_add_variable_chk2 ; 00
  6113 00009DEA 49                  <1> 	dec	ecx
  6114 00009DEB 75EA                <1> 	jnz	short set_env_add_variable_loop
  6115                              <1> 
  6116                              <1> set_env_add_variable_nspc: ; no space on environment page
  6117 00009DED 58                  <1> 	pop	eax ; *****
  6118                              <1> 	;mov	eax, 8 ; No space for new environment string
  6119                              <1> 	; 25/07/2022
  6120 00009DEE 29C0                <1> 	sub	eax, eax
  6121 00009DF0 B008                <1> 	mov	al, 8
  6122 00009DF2 F9                  <1> 	stc
  6123 00009DF3 EB95                <1>         jmp     short set_env_string_allocate_envb_retn
  6124                              <1> 
  6125                              <1> set_env_add_variable_chk2:
  6126 00009DF5 8B0C24              <1> 	mov	ecx, [esp] ; *****
  6127 00009DF8 4E                  <1> 	dec	esi ; beginning address of the new variable
  6128 00009DF9 89F0                <1> 	mov	eax, esi
  6129 00009DFB 01C8                <1> 	add	eax, ecx ; string length (with CR)
  6130                              <1> 	;add	edx, Env_Page_Size ; 512 (4096)
  6131                              <1> 	; 25/07/2022
  6132 00009DFD 81C300020000        <1> 	add	ebx, Env_Page_Size
  6133                              <1> 	;cmp	eax, edx 
  6134 00009E03 39D8                <1> 	cmp	eax, ebx ; 25/07/2022
  6135 00009E05 77E6                <1> 	ja	short set_env_add_variable_nspc
  6136 00009E07 49                  <1> 	dec	ecx ; except CR at the end
  6137                              <1> 	;mov	edx, ecx ; 12/04/2016
  6138                              <1> 	; 25/07/2022
  6139 00009E08 89CB                <1> 	mov	ebx, ecx
  6140 00009E0A 89F7                <1> 	mov	edi, esi
  6141 00009E0C 893C24              <1> 	mov	[esp], edi ; ***** ; Start address of new variable
  6142                              <1> 	;mov	esi, ebx ; ASCIIZ environment string address
  6143                              <1> 	; 25/07/2022
  6144 00009E0F 89D6                <1> 	mov	esi, edx
  6145 00009E11 F3A4                <1> 	rep	movsb
  6146 00009E13 28C0                <1> 	sub	al, al
  6147 00009E15 AA                  <1> 	stosb
  6148 00009E16 58                  <1> 	pop	eax ; ***** ; Beginning address of new variable			
  6149 00009E17 81FF00320900        <1>         cmp     edi, Env_Page + Env_Page_Size ; 12/04/2016
  6150                              <1> 	;jnb	set_env_string_allocate_envb_retn ; OK !
  6151                              <1> 	; 25/07/2022
  6152 00009E1D 7303                <1>  	jnb	short set_env_add_variable_chk3
  6153 00009E1F 880F                <1> 	mov	[edi], cl ; 0
  6154 00009E21 F8                  <1> 	clc	; 13/04/2016
  6155                              <1> set_env_add_variable_chk3:
  6156 00009E22 E963FFFFFF          <1>         jmp     set_env_string_allocate_envb_retn ; OK !
  6157                              <1> 
  6158                              <1> set_env_change_variable:
  6159                              <1> 	; 06/04/2016
  6160                              <1> 	; esi = Variable's address in environment page (after '=')
  6161                              <1> 	; edi = ASCIIZ environment string address (after '=')
  6162                              <1> 
  6163                              <1> 	; ah = variable length from start to the '='
  6164 00009E27 8825[74830100]      <1> 	mov	[env_var_length], ah
  6165                              <1> 
  6166 00009E2D 28C9                <1> 	sub	cl, cl ; ecx = 0
  6167                              <1> 
  6168 00009E2F 57                  <1> 	push	edi ; *****
  6169                              <1> 
  6170 00009E30 89F7                <1> 	mov	edi, esi ; 11/04/2016
  6171                              <1> 
  6172                              <1> set_env_change_variable_calc1:
  6173 00009E32 AC                  <1> 	lodsb
  6174 00009E33 08C0                <1> 	or	al, al
  6175 00009E35 7403                <1> 	jz	short set_env_change_variable_calc2
  6176                              <1> 
  6177 00009E37 41                  <1> 	inc	ecx ; length of environment string (after the '=')
  6178                              <1> 
  6179 00009E38 EBF8                <1> 	jmp	short set_env_change_variable_calc1	
  6180                              <1> 
  6181                              <1> set_env_change_variable_calc2:
  6182 00009E3A 8B3424              <1> 	mov	esi, [esp] ; ASCIIZ environment string address
  6183                              <1> 	
  6184 00009E3D 29D2                <1> 	sub	edx, edx
  6185                              <1> 
  6186                              <1> set_env_change_variable_calc3:
  6187 00009E3F AC                  <1> 	lodsb
  6188 00009E40 3C20                <1> 	cmp	al, 20h
  6189 00009E42 7203                <1> 	jb	short set_env_change_variable_calc4
  6190                              <1> 
  6191 00009E44 42                  <1> 	inc	edx ; length of ASCIIZ string (after the '=')
  6192                              <1> 	
  6193 00009E45 EBF8                <1> 	jmp	short set_env_change_variable_calc3
  6194                              <1> 	
  6195                              <1> set_env_change_variable_calc4:
  6196 00009E47 C646FF00            <1> 	mov	byte [esi-1], 0  ; put ZERO instead of CR
  6197                              <1> 	
  6198 00009E4B 5E                  <1> 	pop	esi ; ***** ; ASCIIZ string address (after '=')
  6199                              <1> 
  6200                              <1> 	; EDI = Old variable's address (after '=')
  6201                              <1> 	
  6202                              <1> 	; compare the new string with the old string
  6203 00009E4C 39CA                <1> 	cmp	edx, ecx
  6204 00009E4E 7718                <1> 	ja	short set_env_change_variable_calc5 ; longer
  6205                              <1> 	;jb	set_env_change_variable_calc9 ; shorter
  6206                              <1> 	; 25/07/2022
  6207 00009E50 7405                <1> 	je	short set_env_change_variable_calc22
  6208 00009E52 E98C000000          <1> 	jmp	set_env_change_variable_calc9 
  6209                              <1> 
  6210                              <1> set_env_change_variable_calc22:	
  6211                              <1> 	;same length (simple copy)
  6212 00009E57 0FB6C4              <1> 	movzx	eax, ah
  6213 00009E5A 01C2                <1> 	add	edx, eax
  6214 00009E5C F7D8                <1> 	neg	eax
  6215 00009E5E 01F8                <1> 	add	eax, edi
  6216                              <1> 	; EAX = Start address of the variable
  6217                              <1> 	; EDX = Variable length (without ZERO at the end of variable)
  6218                              <1> 
  6219 00009E60 F3A4                <1> 	rep	movsb
  6220 00009E62 F8                  <1> 	clc	; 13/04/2016
  6221 00009E63 E922FFFFFF          <1>         jmp     set_env_string_allocate_envb_retn ; OK !
  6222                              <1> 
  6223                              <1> set_env_change_variable_calc5:
  6224                              <1> 	; 11/04/2016
  6225 00009E68 52                  <1> 	push	edx ; *****
  6226 00009E69 29CA                <1> 	sub	edx, ecx ; difference ; (the new string is longer)
  6227 00009E6B 89F3                <1> 	mov 	ebx, esi
  6228 00009E6D 89FE                <1> 	mov	esi, edi
  6229                              <1> 
  6230                              <1> set_env_change_variable_calc6:
  6231 00009E6F AC                  <1> 	lodsb 
  6232 00009E70 20C0                <1> 	and	al, al
  6233 00009E72 75FB                <1> 	jnz	short set_env_change_variable_calc6
  6234                              <1> 
  6235 00009E74 81FE00320900        <1> 	cmp	esi, Env_Page + Env_Page_Size ; 512 (4096)
  6236 00009E7A 0F836DFFFFFF        <1>         jnb     set_env_add_variable_nspc
  6237                              <1> 
  6238 00009E80 89F9                <1> 	mov	ecx, edi  ; current (old) variable's address
  6239 00009E82 89F7                <1> 	mov	edi, esi  ; next variable's address 
  6240                              <1> 
  6241 00009E84 AC                  <1> 	lodsb
  6242 00009E85 08C0                <1> 	or	al, al
  6243 00009E87 7417                <1> 	jz	short set_env_change_variable_calc8 ; 00
  6244                              <1> 
  6245                              <1> set_env_change_variable_calc7:
  6246 00009E89 AC                  <1> 	lodsb
  6247 00009E8A 20C0                <1> 	and	al, al
  6248 00009E8C 75FB                <1> 	jnz	short set_env_change_variable_calc7
  6249                              <1> 
  6250 00009E8E 81FE00320900        <1> 	cmp	esi, Env_Page + Env_Page_Size ; 512 (4096)
  6251                              <1> 	;jnb	set_env_add_variable_nspc
  6252                              <1> 	; 25/07/2022
  6253 00009E94 7205                <1> 	jb	short set_env_change_variable_calc24
  6254                              <1> set_env_change_variable_calc23:
  6255 00009E96 E952FFFFFF          <1> 	jmp	set_env_add_variable_nspc
  6256                              <1> 
  6257                              <1> set_env_change_variable_calc24:
  6258 00009E9B AC                  <1> 	lodsb
  6259 00009E9C 08C0                <1> 	or	al, al
  6260 00009E9E 75E9                <1> 	jnz	short set_env_change_variable_calc7
  6261                              <1> 
  6262                              <1> set_env_change_variable_calc8:
  6263 00009EA0 4E                  <1> 	dec	esi ; address of the second (last) 0 of the 00
  6264                              <1> 
  6265 00009EA1 01F2                <1> 	add	edx, esi ; final position of the last 0
  6266                              <1> 
  6267 00009EA3 81FA00320900        <1> 	cmp	edx, Env_Page + Env_Page_Size ; 512 (4096)
  6268                              <1> 	;jnb     set_env_add_variable_nspc
  6269                              <1> 	; 25/07/2022
  6270 00009EA9 73EB                <1> 	jnb	short set_env_change_variable_calc23
  6271                              <1> 
  6272 00009EAB 89C8                <1> 	mov	eax, ecx ; old variable's address (after '=')
  6273                              <1> 
  6274 00009EAD 89F1                <1> 	mov	ecx, esi 
  6275 00009EAF 29F9                <1> 	sub	ecx, edi ; count of bytes to move forward
  6276                              <1> 
  6277                              <1> 	; 13/04/2016
  6278 00009EB1 C60200              <1> 	mov	byte [edx], 0
  6279 00009EB4 89D7                <1> 	mov	edi, edx
  6280 00009EB6 29F2                <1> 	sub	edx, esi ; difference (additional byte count)
  6281 00009EB8 4F                  <1> 	dec	edi ; the last zero address (first byte of the 00)
  6282 00009EB9 89FE                <1> 	mov	esi, edi
  6283 00009EBB 29D6                <1> 	sub	esi, edx ; - displacement
  6284                              <1> 	
  6285 00009EBD FA                  <1> 	cli	; disable interrupts
  6286 00009EBE FD                  <1> 	std	; backward
  6287                              <1> 
  6288 00009EBF F3A4                <1> 	rep	movsb ; move ECX bytes from DS:ESI to ES:EDI
  6289                              <1> 
  6290 00009EC1 FC                  <1> 	cld	; forward (default)
  6291 00009EC2 FB                  <1> 	sti	; enable interrupts
  6292                              <1> 	
  6293 00009EC3 89C7                <1> 	mov	edi, eax
  6294 00009EC5 59                  <1> 	pop	ecx ; ***** ; byte count (after '=')
  6295 00009EC6 89CA                <1> 	mov	edx, ecx
  6296 00009EC8 89DE                <1> 	mov	esi, ebx ; ASCIIZ string address (after '=')
  6297 00009ECA 89FB                <1> 	mov	ebx, edi
  6298                              <1> 
  6299 00009ECC F3A4                <1> 	rep	movsb
  6300                              <1> 
  6301 00009ECE 880F                <1> 	mov	[edi], cl ; 0 ; end of variable
  6302                              <1> 
  6303 00009ED0 0FB605[74830100]    <1> 	movzx	eax, byte [env_var_length]
  6304 00009ED7 01C2                <1> 	add	edx, eax ; variable length (total)
  6305 00009ED9 F7D8                <1> 	neg	eax
  6306 00009EDB 01D8                <1> 	add	eax, ebx ; start address of the variable
  6307 00009EDD F8                  <1> 	clc	; 13/04/2016
  6308 00009EDE E9A7FEFFFF          <1>         jmp     set_env_string_allocate_envb_retn ; OK !
  6309                              <1> 
  6310                              <1> set_env_change_variable_calc9:
  6311                              <1> 	; 11/04/2016
  6312 00009EE3 21D2                <1> 	and	edx, edx ; is empty ?
  6313 00009EE5 753B                <1> 	jnz	short set_env_change_variable_calc15
  6314                              <1> 	
  6315 00009EE7 0FB6DC              <1> 	movzx	ebx, ah
  6316 00009EEA F7DB                <1> 	neg	ebx
  6317 00009EEC 01FB                <1> 	add	ebx, edi
  6318                              <1> 
  6319                              <1> 	; EBX = Start address of the variable (in env page)
  6320                              <1> 	; EDX = Variable length = 0
  6321                              <1> 	
  6322 00009EEE 89FE                <1> 	mov	esi, edi
  6323                              <1> 
  6324                              <1> set_env_change_variable_calc10:
  6325 00009EF0 AC                  <1> 	lodsb
  6326 00009EF1 08C0                <1> 	or	al, al
  6327 00009EF3 75FB                <1> 	jnz	short set_env_change_variable_calc10
  6328                              <1> 
  6329 00009EF5 B9FF310900          <1> 	mov	ecx, Env_Page + Env_Page_Size - 1
  6330                              <1> 
  6331 00009EFA 39CE                <1> 	cmp	esi, ecx ; +511 (+4095)
  6332 00009EFC 7604                <1> 	jna	short set_env_change_variable_calc11
  6333                              <1> 
  6334 00009EFE 89CE                <1> 	mov	esi, ecx
  6335 00009F00 8806                <1> 	mov	[esi], al ; 0
  6336                              <1> 
  6337                              <1> set_env_change_variable_calc11:
  6338 00009F02 89DF                <1> 	mov	edi, ebx ; old variable's start address
  6339                              <1> 
  6340                              <1> set_env_change_variable_calc12:
  6341 00009F04 AC                  <1> 	lodsb
  6342 00009F05 AA                  <1> 	stosb
  6343 00009F06 20C0                <1> 	and	al, al
  6344 00009F08 75FA                <1> 	jnz	short set_env_change_variable_calc12
  6345 00009F0A 39CE                <1> 	cmp	esi, ecx
  6346 00009F0C 7706                <1> 	ja	short set_env_change_variable_calc13
  6347 00009F0E AC                  <1> 	lodsb
  6348 00009F0F AA                  <1> 	stosb
  6349 00009F10 20C0                <1> 	and	al, al
  6350 00009F12 75F0                <1> 	jnz	short set_env_change_variable_calc12	
  6351                              <1> 
  6352                              <1> set_env_change_variable_calc13:
  6353 00009F14 29F9                <1> 	sub	ecx, edi
  6354 00009F16 7203                <1> 	jb	short set_env_change_variable_calc14
  6355 00009F18 41                  <1> 	inc	ecx ; 1-512 (1-4096)
  6356 00009F19 F3AA                <1> 	rep	stosb ; al = 0	
  6357                              <1> 
  6358                              <1> set_env_change_variable_calc14:
  6359 00009F1B 29C0                <1> 	sub	eax, eax ; Start address of the variable
  6360                              <1> 	; EAX = 0 -> Variable is removed
  6361                              <1> 	; EDX = Variable length = 0	
  6362                              <1> 
  6363 00009F1D E968FEFFFF          <1>         jmp     set_env_string_allocate_envb_retn ; OK !
  6364                              <1> 	    
  6365                              <1> set_env_change_variable_calc15:	
  6366 00009F22 52                  <1> 	push	edx ; *****
  6367 00009F23 F7DA                <1> 	neg	edx
  6368 00009F25 01CA                <1> 	add	edx, ecx ; difference (the old string is longer)
  6369 00009F27 89F3                <1> 	mov 	ebx, esi
  6370 00009F29 89FE                <1> 	mov	esi, edi
  6371                              <1> 
  6372                              <1> set_env_change_variable_calc16:
  6373 00009F2B AC                  <1> 	lodsb 
  6374 00009F2C 20C0                <1> 	and	al, al
  6375 00009F2E 75FB                <1> 	jnz	short set_env_change_variable_calc16
  6376                              <1> 
  6377 00009F30 B900320900          <1> 	mov	ecx, Env_Page + Env_Page_Size
  6378                              <1> 
  6379 00009F35 39CE                <1> 	cmp	esi, ecx ; +512 (+4096)
  6380 00009F37 7605                <1> 	jna	short set_env_change_variable_calc17
  6381                              <1> 
  6382 00009F39 89CE                <1> 	mov	esi, ecx
  6383 00009F3B 8846FF              <1> 	mov	[esi-1], al ; 0
  6384                              <1> 
  6385                              <1> set_env_change_variable_calc17:
  6386 00009F3E 89F9                <1> 	mov	ecx, edi  ; current (old) variable's address
  6387 00009F40 89F7                <1> 	mov	edi, esi  ; next variable's address 
  6388                              <1> 
  6389 00009F42 AC                  <1> 	lodsb
  6390 00009F43 08C0                <1> 	or	al, al
  6391 00009F45 741D                <1> 	jz	short set_env_change_variable_calc20
  6392                              <1> 
  6393                              <1> set_env_change_variable_calc18:
  6394 00009F47 AC                  <1> 	lodsb
  6395 00009F48 20C0                <1> 	and	al, al
  6396 00009F4A 75FB                <1> 	jnz	short set_env_change_variable_calc18
  6397                              <1> 
  6398 00009F4C 81FE00320900        <1> 	cmp	esi, Env_Page + Env_Page_Size
  6399 00009F52 720B                <1> 	jb	short set_env_change_variable_calc19
  6400 00009F54 740E                <1> 	je	short set_env_change_variable_calc20
  6401                              <1> 
  6402 00009F56 BEFF310900          <1> 	mov	esi, Env_Page + Env_Page_Size - 1
  6403 00009F5B 8806                <1> 	mov	[esi], al ; 0
  6404 00009F5D EB06                <1> 	jmp	short set_env_change_variable_calc21
  6405                              <1> 
  6406                              <1> set_env_change_variable_calc19:
  6407 00009F5F AC                  <1> 	lodsb
  6408 00009F60 08C0                <1> 	or	al, al
  6409 00009F62 75E3                <1> 	jnz	short set_env_change_variable_calc18
  6410                              <1> 
  6411                              <1> set_env_change_variable_calc20:
  6412 00009F64 4E                  <1> 	dec	esi ; address of the second (last) 0 of the 00
  6413                              <1> 
  6414                              <1> set_env_change_variable_calc21:
  6415                              <1> 	; edx = difference (byte count)
  6416                              <1> 	
  6417 00009F65 89C8                <1> 	mov	eax, ecx ; old variable's address (after '=')
  6418                              <1> 
  6419 00009F67 89F1                <1> 	mov	ecx, esi 
  6420 00009F69 29F9                <1> 	sub	ecx, edi ; count of bytes to move backward
  6421                              <1> 
  6422 00009F6B 89FE                <1> 	mov	esi, edi ; next variable's address
  6423 00009F6D 29D7                <1> 	sub	edi, edx ; (displacement)
  6424                              <1> 	
  6425 00009F6F F3A4                <1> 	rep	movsb
  6426                              <1> 
  6427 00009F71 880F                <1> 	mov	[edi], cl ; 0 ; 00 ; end of environment variables
  6428                              <1> 
  6429 00009F73 89C7                <1> 	mov	edi, eax
  6430 00009F75 5A                  <1> 	pop	edx ; ***** ; byte count (after '=')
  6431 00009F76 89D1                <1> 	mov	ecx, edx
  6432 00009F78 89DE                <1> 	mov	esi, ebx ; ASCIIZ string address (after '=')
  6433 00009F7A 89FB                <1> 	mov	ebx, edi
  6434                              <1> 	
  6435 00009F7C F3A4                <1> 	rep	movsb
  6436                              <1> 
  6437 00009F7E 880F                <1> 	mov	[edi], cl ; 0 ; end of variable
  6438                              <1> 
  6439 00009F80 0FB605[74830100]    <1> 	movzx	eax, byte [env_var_length]
  6440 00009F87 01C2                <1> 	add	edx, eax ; variable length (total)
  6441 00009F89 F7D8                <1> 	neg	eax
  6442 00009F8B 01D8                <1> 	add	eax, ebx ; start address of the variable
  6443 00009F8D F8                  <1> 	clc	; 13/04/2016
  6444 00009F8E E9F7FDFFFF          <1>         jmp     set_env_string_allocate_envb_retn ; OK !
  6445                              <1> 
  6446                              <1> mainprog_startup_configuration:
  6447                              <1> 	; 25/07/2022 - TRDOS 386 Kernel v2.0.5
  6448                              <1> 	; 22/11/2017
  6449                              <1> 	; 06/05/2016
  6450                              <1> 	; 14/04/2016 (TRDOS 386 = TRDOS v2.0)
  6451                              <1> 	; 17/09/2011 (TRDOS v1, MAINPROG.ASM)
  6452                              <1> 	;
  6453                              <1> loc_load_mainprog_cfg_file:
  6454 00009F93 BE[0D300100]        <1> 	mov	esi, MainProgCfgFile
  6455 00009F98 66B80018            <1> 	mov	ax, 1800h ; Except volume label and dirs
  6456 00009F9C E8EFEAFFFF          <1> 	call	find_first_file
  6457 00009FA1 7256                <1> 	jc	short loc_load_mainprog_cfg_exit
  6458                              <1> 
  6459                              <1> 	;or	eax, eax
  6460                              <1> 	;jz	short loc_load_mainprog_cfg_exit
  6461                              <1> 
  6462                              <1> loc_start_mainprog_configuration:
  6463                              <1> 	; ESI = FindFile_DirEntry Location
  6464                              <1> 	; EAX = File Size
  6465                              <1> 
  6466 00009FA3 A3[F8770100]        <1> 	mov	[MainProgCfg_FileSize], eax
  6467                              <1> 
  6468 00009FA8 668B5614            <1> 	mov	dx, [esi+DirEntry_FstClusHI]
  6469 00009FAC C1E210              <1> 	shl	edx, 16
  6470 00009FAF 668B561A            <1> 	mov	dx, [esi+DirEntry_FstClusLO]
  6471 00009FB3 8915[28830100]      <1> 	mov	[csftdf_sf_cluster], edx
  6472                              <1> 
  6473 00009FB9 89C1                <1> 	mov	ecx, eax
  6474 00009FBB 29C0                <1> 	sub	eax, eax
  6475                              <1> 
  6476                              <1> 	; TRDOS 386 (TRDOS v2.0)
  6477                              <1> 	; Allocate contiguous memory block for loading the file
  6478                              <1> 	
  6479                              <1> 	; eax = 0 (Allocate memory from the beginning)
  6480                              <1> 	; ecx = File (Allocation) size in bytes
  6481                              <1> 	
  6482 00009FBD E844BCFFFF          <1> 	call	allocate_memory_block
  6483 00009FC2 7235                <1> 	jc	short loc_load_mainprog_cfg_exit
  6484                              <1> 
  6485 00009FC4 A3[20830100]        <1> 	mov	[csftdf_sf_mem_addr], eax ; loading address
  6486 00009FC9 890D[24830100]      <1> 	mov	[csftdf_sf_mem_bsize], ecx ; block size
  6487                              <1> 
  6488 00009FCF 31DB                <1> 	xor	ebx, ebx
  6489                              <1> 	;mov	[csftdf_sf_rbytes], ebx ; 0, reset
  6490                              <1> 
  6491 00009FD1 8A3D[0A780100]      <1> 	mov	bh, [Current_Drv] ; [FindFile_Drv]
  6492 00009FD7 BE00010900          <1> 	mov	esi, Logical_DOSDisks
  6493 00009FDC 01DE                <1> 	add	esi, ebx
  6494                              <1> 
  6495 00009FDE 8B1D[20830100]      <1> 	mov	ebx, [csftdf_sf_mem_addr] ; memory block address
  6496                              <1> 
  6497 00009FE4 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
  6498 00009FE8 7710                <1>         ja	short loc_mcfg_load_fat_file
  6499                              <1> 
  6500 00009FEA C705[30830100]0000- <1> 	mov	dword [csftdf_r_size], 65536
  6500 00009FF2 0100                <1>
  6501 00009FF4 E99A010000          <1>         jmp     loc_mcfg_load_fs_file
  6502                              <1> 
  6503                              <1> loc_load_mainprog_cfg_exit:
  6504 00009FF9 C3                  <1> 	retn 
  6505                              <1> 
  6506                              <1> loc_mcfg_load_fat_file:
  6507 00009FFA 0FB74611            <1> 	movzx	eax, word [esi+LD_BPB+BytesPerSec]
  6508 00009FFE 0FB64E13            <1> 	movzx	ecx, byte [esi+LD_BPB+SecPerClust]
  6509 0000A002 F7E1                <1> 	mul	ecx
  6510 0000A004 A3[30830100]        <1> 	mov	[csftdf_r_size], eax
  6511                              <1> 
  6512                              <1> loc_mcfg_load_fat_file_next:
  6513 0000A009 E81D010000          <1> 	call	mcfg_read_fat_file_sectors
  6514 0000A00E 7259                <1>         jc	short mcfg_deallocate_mem ; 25/07/2022
  6515                              <1> 
  6516 0000A010 09D2                <1> 	or	edx, edx ; edx > 0 -> EOF
  6517 0000A012 74F5                <1> 	jz	short loc_mcfg_load_fat_file_next
  6518                              <1> 
  6519                              <1> loc_mcfg_load_fat_file_ok:
  6520                              <1> 	; 06/05/2016
  6521 0000A014 C705[C4830100]-     <1> 	mov	dword [mainprog_return_addr], loc_mcfg_ci_return_addr 
  6521 0000A01A [E6A00000]          <1>
  6522                              <1> 	;
  6523 0000A01E 8B35[20830100]      <1> 	mov	esi, [csftdf_sf_mem_addr]
  6524 0000A024 8935[FC770100]      <1> 	mov	[MainProgCfg_LineOffset], esi
  6525                              <1> 	
  6526 0000A02A A1[F8770100]        <1> 	mov	eax, [MainProgCfg_FileSize]
  6527 0000A02F 89C2                <1> 	mov	edx, eax
  6528 0000A031 01F2                <1> 	add	edx, esi
  6529                              <1> 
  6530                              <1> loc_mcfg_process_next_line_check:
  6531 0000A033 89C1                <1> 	mov	ecx, eax
  6532                              <1> 
  6533 0000A035 803E2A              <1> 	cmp	byte [esi], "*" ; Remark sign
  6534 0000A038 7503                <1> 	jne	short loc_mcfg_process_next_line
  6535 0000A03A 46                  <1> 	inc	esi
  6536 0000A03B EB16                <1> 	jmp	short loc_move_mainprog_cfg_nl1
  6537                              <1> 
  6538                              <1> loc_mcfg_process_next_line:
  6539 0000A03D 83F94F              <1> 	cmp	ecx, 79
  6540 0000A040 7604                <1> 	jna	short loc_start_mainprog_cfg_process
  6541                              <1> 	
  6542                              <1> 	;mov	ecx, 79 
  6543                              <1> 	; 25/07/2022
  6544 0000A042 29C9                <1> 	sub	ecx, ecx
  6545 0000A044 B14F                <1> 	mov	cl, 79
  6546                              <1> 
  6547                              <1> loc_start_mainprog_cfg_process:
  6548 0000A046 BF[BA780100]        <1> 	mov	edi, CommandBuffer
  6549                              <1> 
  6550                              <1> loc_move_mainprog_cfg_line:
  6551 0000A04B AC                  <1> 	lodsb
  6552 0000A04C 3C20                <1> 	cmp	al, 20h
  6553 0000A04E 720C                <1> 	jb	short loc_move_mainprog_cfg_nl2
  6554 0000A050 AA                  <1> 	stosb
  6555 0000A051 E2F8                <1> 	loop	loc_move_mainprog_cfg_line
  6556                              <1> 
  6557                              <1> loc_move_mainprog_cfg_nl1:
  6558 0000A053 39D6                <1> 	cmp	esi, edx ; + configuration file size
  6559 0000A055 7322                <1> 	jnb	short loc_end_of_mainprog_cfg_line
  6560 0000A057 AC                  <1> 	lodsb
  6561 0000A058 3C20                <1> 	cmp	al, 20h
  6562 0000A05A 73F7                <1> 	jnb	short loc_move_mainprog_cfg_nl1
  6563                              <1> 
  6564                              <1> loc_move_mainprog_cfg_nl2:
  6565 0000A05C 39D6                <1> 	cmp	esi, edx
  6566 0000A05E 7319                <1> 	jnb	short loc_end_of_mainprog_cfg_line
  6567 0000A060 8A06                <1> 	mov	al, [esi]
  6568 0000A062 3C20                <1> 	cmp	al, 20h
  6569 0000A064 7713                <1>  	ja	short loc_end_of_mainprog_cfg_line
  6570 0000A066 46                  <1> 	inc	esi
  6571 0000A067 EBF3                <1> 	jmp	short loc_move_mainprog_cfg_nl2	
  6572                              <1> 
  6573                              <1> 	; 25/07/2022
  6574                              <1> mcfg_deallocate_mem:
  6575 0000A069 A1[20830100]        <1> 	mov	eax, [csftdf_sf_mem_addr] ; start address
  6576 0000A06E 8B0D[24830100]      <1> 	mov	ecx, [csftdf_sf_mem_bsize] ; block size	
  6577                              <1> 	;call	deallocate_memory_block
  6578                              <1> 	;retn
  6579 0000A074 E9ADBDFFFF          <1> 	jmp	deallocate_memory_block               
  6580                              <1> 
  6581                              <1> loc_end_of_mainprog_cfg_line:
  6582 0000A079 C60700              <1> 	mov	byte [edi], 0
  6583                              <1> 
  6584 0000A07C 8935[FC770100]      <1> 	mov	[MainProgCfg_LineOffset], esi
  6585                              <1> 
  6586                              <1> 	; 22/11/2017
  6587 0000A082 BE[C2780100]        <1> 	mov	esi, CommandBuffer + 8
  6588 0000A087 29FE                <1> 	sub	esi, edi
  6589 0000A089 7606                <1> 	jna	short loc_move_mainprog_cfg_command
  6590 0000A08B 30C0                <1> 	xor	al, al
  6591                              <1> loc_mainprog_cfg_clear_chrs:
  6592 0000A08D AA                  <1> 	stosb
  6593 0000A08E 4E                  <1> 	dec	esi
  6594 0000A08F 75FC                <1> 	jnz	short loc_mainprog_cfg_clear_chrs	
  6595                              <1> 
  6596                              <1> loc_move_mainprog_cfg_command:
  6597 0000A091 BE[BA780100]        <1> 	mov	esi, CommandBuffer
  6598 0000A096 89F7                <1> 	mov	edi, esi
  6599 0000A098 31DB                <1> 	xor	ebx, ebx
  6600                              <1> 	;xor	ecx, ecx
  6601 0000A09A 30C9                <1> 	xor	cl, cl
  6602                              <1> 
  6603                              <1> loc_move_mcfg_first_cmd_char:
  6604 0000A09C 8A041E              <1> 	mov	al, [esi+ebx]
  6605 0000A09F FEC3                <1> 	inc	bl 
  6606 0000A0A1 3C20                <1> 	cmp	al, 20h
  6607 0000A0A3 7712                <1> 	ja	short loc_move_mcfg_cmd_capitalizing
  6608 0000A0A5 7237                <1> 	jb	short loc_move_mcfg_cmd_arguments_ok
  6609 0000A0A7 80FB4F              <1> 	cmp	bl, 79
  6610 0000A0AA 72F0                <1> 	jb	short loc_move_mcfg_first_cmd_char
  6611 0000A0AC EB30                <1> 	jmp	short loc_move_mcfg_cmd_arguments_ok
  6612                              <1> 
  6613                              <1> loc_move_mcfg_next_cmd_char:
  6614 0000A0AE 8A041E              <1> 	mov	al, [esi+ebx]
  6615 0000A0B1 FEC3                <1> 	inc	bl
  6616 0000A0B3 3C20                <1> 	cmp	al, 20h
  6617 0000A0B5 7614                <1> 	jna	short loc_move_mcfg_cmd_ok
  6618                              <1> 
  6619                              <1> loc_move_mcfg_cmd_capitalizing:
  6620 0000A0B7 3C61                <1> 	cmp	al, 61h ; 'a'
  6621 0000A0B9 7206                <1> 	jb	short loc_move_mcfg_cmd_caps_ok
  6622 0000A0BB 3C7A                <1> 	cmp	al, 7Ah ; 'z'
  6623 0000A0BD 7702                <1> 	ja	short loc_move_mcfg_cmd_caps_ok
  6624 0000A0BF 24DF                <1> 	and	al, 0DFh ; sub	al, 'a'-'A'
  6625                              <1> 
  6626                              <1> loc_move_mcfg_cmd_caps_ok:
  6627 0000A0C1 AA                  <1> 	stosb 
  6628 0000A0C2 FEC1                <1> 	inc	cl
  6629 0000A0C4 80FB4F              <1> 	cmp	bl, 79
  6630 0000A0C7 72E5                <1> 	jb	short loc_move_mcfg_next_cmd_char
  6631 0000A0C9 EB13                <1> 	jmp	short loc_move_mcfg_cmd_arguments_ok
  6632                              <1> 
  6633                              <1> loc_move_mcfg_cmd_ok:
  6634 0000A0CB 30C0                <1> 	xor	al, al ; 0
  6635                              <1> 
  6636                              <1> loc_move_mcfg_cmd_arguments:
  6637 0000A0CD 8807                <1> 	mov	[edi], al
  6638 0000A0CF 47                  <1> 	inc	edi
  6639 0000A0D0 80FB4F              <1> 	cmp	bl, 79
  6640 0000A0D3 7309                <1> 	jnb	short loc_move_mcfg_cmd_arguments_ok
  6641 0000A0D5 8A041E              <1> 	mov	al, [esi+ebx]
  6642 0000A0D8 FEC3                <1> 	inc	bl
  6643 0000A0DA 3C20                <1> 	cmp	al, 20h
  6644 0000A0DC 73EF                <1> 	jnb	short loc_move_mcfg_cmd_arguments
  6645                              <1> 	
  6646                              <1> loc_move_mcfg_cmd_arguments_ok:
  6647 0000A0DE C60700              <1> 	mov	byte [edi], 0
  6648                              <1>        
  6649                              <1> loc_mcfg_process_cmd_interpreter:
  6650 0000A0E1 E8E8E0FFFF          <1> 	call    command_interpreter
  6651                              <1> 
  6652                              <1> loc_mcfg_ci_return_addr: 
  6653 0000A0E6 A1[F8770100]        <1> 	mov	eax, [MainProgCfg_FileSize]
  6654 0000A0EB 89C2                <1> 	mov	edx, eax
  6655 0000A0ED 8B35[FC770100]      <1> 	mov	esi, [MainProgCfg_LineOffset]
  6656 0000A0F3 01F2                <1> 	add	edx, esi
  6657 0000A0F5 0305[20830100]      <1> 	add	eax, [csftdf_sf_mem_addr]
  6658 0000A0FB 29F0                <1> 	sub	eax, esi
  6659 0000A0FD 0F8730FFFFFF        <1>         ja      loc_mcfg_process_next_line_check
  6660                              <1> 
  6661 0000A103 E861FFFFFF          <1> 	call	mcfg_deallocate_mem
  6662                              <1>  
  6663 0000A108 B94F000000          <1>  	mov	ecx, 79 ; 80 ?
  6664 0000A10D BF[BA780100]        <1> 	mov	edi, CommandBuffer
  6665 0000A112 30C0                <1> 	xor	al, al
  6666 0000A114 F3AA                <1> 	rep	stosb
  6667                              <1> 
  6668                              <1> 	; 06/05/2016
  6669 0000A116 BE[4B3A0100]        <1> 	mov	esi, nextline
  6670 0000A11B E88ACBFFFF          <1> 	call	print_msg
  6671 0000A120 E9FAD7FFFF          <1> 	jmp	dos_prompt
  6672                              <1> 
  6673                              <1> mcfg_read_file_sectors:
  6674                              <1> 	; 14/04/2016
  6675 0000A125 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
  6676 0000A129 7668                <1>         jna	short mcfg_read_fs_file_sectors
  6677                              <1> 
  6678                              <1> mcfg_read_fat_file_sectors:
  6679                              <1> 	; return:
  6680                              <1> 	;   CF = 0 & EDX > 0 -> END OF FILE
  6681                              <1> 	;   CF = 0 & EDX = 0 -> not EOF
  6682                              <1> 	;   CF = 1 -> read error (error code in AL)	
  6683                              <1> 
  6684                              <1> mcfg_read_fat_file_secs_0:
  6685 0000A12B 8B15[F8770100]      <1> 	mov	edx, [MainProgCfg_FileSize]
  6686 0000A131 2B15[38830100]      <1> 	sub	edx, [csftdf_sf_rbytes]
  6687 0000A137 3B15[30830100]      <1> 	cmp	edx, [csftdf_r_size]	
  6688 0000A13D 7306                <1> 	jnb	short mcfg_read_fat_file_secs_1
  6689 0000A13F 8915[30830100]      <1> 	mov	[csftdf_r_size], edx
  6690                              <1> 		
  6691                              <1> mcfg_read_fat_file_secs_1:
  6692 0000A145 A1[30830100]        <1> 	mov	eax, [csftdf_r_size]
  6693 0000A14A 29D2                <1> 	sub	edx, edx
  6694 0000A14C 0FB74E11            <1> 	movzx	ecx, word [esi+LD_BPB+BytesPerSec]
  6695 0000A150 01C8                <1> 	add	eax, ecx
  6696 0000A152 48                  <1> 	dec	eax
  6697 0000A153 F7F1                <1> 	div	ecx
  6698 0000A155 89C1                <1> 	mov	ecx, eax ; sector count
  6699 0000A157 A1[28830100]        <1> 	mov	eax, [csftdf_sf_cluster]
  6700                              <1> 
  6701                              <1> 	; EBX = memory block address (current)
  6702                              <1> 	
  6703 0000A15C E8A6220000          <1> 	call	read_fat_file_sectors
  6704 0000A161 7230                <1> 	jc	short mcfg_read_fat_file_secs_3
  6705                              <1> 
  6706                              <1> 	; EBX = next memory address
  6707                              <1> 
  6708 0000A163 A1[38830100]        <1> 	mov	eax, [csftdf_sf_rbytes]
  6709 0000A168 0305[30830100]      <1> 	add	eax, [csftdf_r_size]
  6710 0000A16E 8B15[F8770100]      <1> 	mov	edx, [MainProgCfg_FileSize]
  6711 0000A174 39D0                <1> 	cmp	eax, edx
  6712 0000A176 731B                <1> 	jnb	short mcfg_read_fat_file_secs_3 ; edx > 0
  6713 0000A178 A3[38830100]        <1> 	mov	[csftdf_sf_rbytes], eax
  6714                              <1> 
  6715 0000A17D 53                  <1> 	push	ebx ; *
  6716                              <1> 	; get next cluster (csftdf_r_size! bytes)
  6717 0000A17E A1[28830100]        <1> 	mov	eax, [csftdf_sf_cluster]
  6718 0000A183 E87F200000          <1> 	call	get_next_cluster
  6719 0000A188 5B                  <1> 	pop	ebx ; *
  6720 0000A189 7301                <1> 	jnc	short mcfg_read_fat_file_secs_2
  6721                              <1> 
  6722                              <1> 	;mov	eax, 17; Read error !
  6723 0000A18B C3                  <1> 	retn
  6724                              <1> 
  6725                              <1> mcfg_read_fat_file_secs_2:
  6726 0000A18C 29D2                <1> 	sub	edx, edx ; 0
  6727 0000A18E A3[28830100]        <1> 	mov	[csftdf_sf_cluster], eax ; next cluster
  6728                              <1> 
  6729                              <1> ; 25/07/2022 - TRDOS 386 Kernel v2.0.5
  6730                              <1> 
  6731                              <1> mcfg_read_fat_file_secs_3:
  6732                              <1> 	;retn
  6733                              <1> 
  6734                              <1> mcfg_read_fs_file_sectors:
  6735                              <1> 	;retn
  6736                              <1> 
  6737                              <1> loc_mcfg_load_fs_file:
  6738 0000A193 C3                  <1> 	retn
  6739                              <1> 
  6740                              <1> load_and_execute_file:
  6741                              <1> 	; 30/08/2023 - TRDOS 386 Kernel v2.0.6
  6742                              <1> 	; 25/07/2022 - TRDOS 386 Kernel v2.0.5
  6743                              <1> 	; 04/01/2017
  6744                              <1> 	; 06/05/2016 - 07/05/2016 - 11/05/2016
  6745                              <1> 	; 23/04/2016 - 24/04/2016
  6746                              <1> 	; 22/04/2016 (TRDOS 386 = TRDOS v2.0)
  6747                              <1> 	; 05/11/2011 
  6748                              <1> 	; (TRDOS v1, CMDINTR.ASM, 'cmp_cmd_run', 'cmp_cmd_external')
  6749                              <1> 	; ('loc_run_check_filename')
  6750                              <1> 	; 29/08/2011
  6751                              <1> 	; 10/09/2011
  6752                              <1> 	; INPUT->
  6753                              <1> 	;	ESI = Path Name address (CommandBuffer address)
  6754                              <1> 	; OUTPUT ->
  6755                              <1> 	;	none (error message will be shown if an error will occur)
  6756                              <1> 	;
  6757                              <1> 	; (EAX, EBX, ECX, EDX, ESI, EDI, EBP will be changed) 
  6758                              <1> 	;
  6759                              <1> loc_run_check_filename:
  6760 0000A194 803E20              <1> 	cmp	byte [esi], 20h
  6761                              <1> 	;jb	loc_cmd_failed
  6762                              <1> 	; 25/07/2022
  6763 0000A197 7237                <1> 	jb	short loc_run_ppn_failed
  6764 0000A199 7703                <1> 	ja	short loc_run_check_filename_ok
  6765 0000A19B 46                  <1> 	inc	esi
  6766 0000A19C EBF6                <1> 	jmp	short loc_run_check_filename
  6767                              <1> 
  6768                              <1> loc_run_check_filename_ok:
  6769 0000A19E C605[6B780100]00    <1> 	mov	byte [CmdArgStart], 0 ; reset
  6770 0000A1A5 56                  <1> 	push	esi ; *
  6771                              <1> loc_run_get_first_arg_pos:
  6772 0000A1A6 46                  <1> 	inc	esi
  6773 0000A1A7 8A06                <1> 	mov	al, [esi]
  6774 0000A1A9 3C20                <1> 	cmp	al, 20h
  6775 0000A1AB 77F9                <1> 	ja	short loc_run_get_first_arg_pos
  6776 0000A1AD C60600              <1> 	mov	byte [esi], 0
  6777                              <1> loc_run_get_external_arg_pos:
  6778                              <1> 	; 11/05/2016
  6779 0000A1B0 46                  <1> 	inc	esi
  6780 0000A1B1 8A06                <1> 	mov	al, [esi]
  6781 0000A1B3 3C20                <1> 	cmp	al, 20h
  6782 0000A1B5 760C                <1> 	jna	short loc_run_parse_path_name
  6783 0000A1B7 89F0                <1> 	mov	eax, esi
  6784 0000A1B9 2D[BA780100]        <1> 	sub	eax, CommandBuffer
  6785 0000A1BE A2[6B780100]        <1> 	mov	byte [CmdArgStart], al
  6786                              <1> loc_run_parse_path_name:
  6787 0000A1C3 5E                  <1> 	pop	esi ; *
  6788 0000A1C4 BF[AA800100]        <1> 	mov	edi, FindFile_Drv
  6789 0000A1C9 E886090000          <1> 	call	parse_path_name
  6790                              <1> 	;jc	loc_cmd_failed
  6791                              <1> 	; 25/07/2022
  6792 0000A1CE 7305                <1> 	jnc	short loc_run_check_filename_exists
  6793                              <1> loc_run_ppn_failed:
  6794 0000A1D0 E9D4E3FFFF          <1> 	jmp	loc_cmd_failed
  6795                              <1> 
  6796                              <1> loc_run_check_filename_exists:
  6797 0000A1D5 BE[EC800100]        <1> 	mov	esi, FindFile_Name
  6798 0000A1DA 803E20              <1> 	cmp	byte [esi], 20h
  6799                              <1> 	;jna	loc_cmd_failed
  6800                              <1> 	; 25/07/2022
  6801 0000A1DD 76F1                <1> 	jna	short loc_run_ppn_failed
  6802                              <1> 
  6803                              <1> loc_run_check_exe_filename_ext:
  6804 0000A1DF E877020000          <1> 	call	check_prg_filename_ext
  6805                              <1> 	;jc	loc_cmd_failed
  6806                              <1> 	; 25/07/2022
  6807 0000A1E4 72EA                <1> 	jc	short loc_run_ppn_failed
  6808                              <1> 	
  6809                              <1> loc_run_check_exe_filename_ext_ok:
  6810 0000A1E6 66A3[C2830100]      <1> 	mov	word [EXE_ID], ax
  6811                              <1> 
  6812                              <1> loc_run_drv:
  6813 0000A1EC C605[C1830100]00    <1> 	mov	byte [Run_Manual_Path], 0
  6814 0000A1F3 A1[04780100]        <1> 	mov	eax, [Current_Dir_FCluster]
  6815 0000A1F8 A3[BC830100]        <1>         mov     [Run_CDirFC], eax
  6816                              <1> 	;
  6817 0000A1FD 8A35[0A780100]      <1> 	mov	dh, [Current_Drv]
  6818 0000A203 8835[677F0100]      <1> 	mov	[RUN_CDRV], dh
  6819                              <1> 
  6820 0000A209 8A15[AA800100]      <1> 	mov	dl, [FindFile_Drv]
  6821 0000A20F 38F2                <1> 	cmp	dl, dh
  6822 0000A211 7413                <1> 	je	short loc_run_change_directory
  6823                              <1>                
  6824 0000A213 8005[C1830100]02    <1> 	add	byte [Run_Manual_Path], 2
  6825                              <1> 
  6826 0000A21A E8C3D5FFFF          <1> 	call	change_current_drive
  6827                              <1> 	;jc	loc_run_cmd_failed
  6828                              <1> 	; 25/07/2022
  6829 0000A21F 7305                <1> 	jnc	short loc_run_change_directory
  6830 0000A221 E9AEE3FFFF          <1> 	jmp	loc_run_cmd_failed
  6831                              <1> 
  6832                              <1> loc_run_change_directory:
  6833 0000A226 803D[AB800100]20    <1> 	cmp	byte [FindFile_Directory], 20h
  6834 0000A22D 7624                <1> 	jna	short loc_run_find_executable_file
  6835                              <1> 
  6836 0000A22F FE05[C1830100]      <1> 	inc	byte [Run_Manual_Path]
  6837                              <1>      
  6838 0000A235 FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  6839                              <1> 
  6840 0000A23B BE[AB800100]        <1> 	mov	esi, FindFile_Directory
  6841 0000A240 30E4                <1> 	xor	ah, ah ; CD_COMMAND sign -> 0 
  6842 0000A242 E821030000          <1> 	call	change_current_directory
  6843                              <1> 	;jc	loc_run_cmd_failed
  6844                              <1> 	; 25/07/2022
  6845 0000A247 7305                <1> 	jnc	short loc_run_change_prompt_dir_string
  6846 0000A249 E986E3FFFF          <1> 	jmp	loc_run_cmd_failed
  6847                              <1> 
  6848                              <1> loc_run_change_prompt_dir_string:
  6849 0000A24E E83E020000          <1> 	call	change_prompt_dir_string
  6850                              <1> 
  6851                              <1> loc_run_find_executable_file:
  6852 0000A253 66C705[C0830100]00- <1> 	mov	word [Run_Auto_Path], 0
  6852 0000A25B 00                  <1>
  6853                              <1> 
  6854                              <1> loc_run_find_executable_file_next:
  6855 0000A25C BE[EC800100]        <1> 	mov	esi, FindFile_Name
  6856                              <1> loc_run_find_program_file_next:
  6857 0000A261 66B80018            <1> 	mov	ax, 1800h ; Except volume label and dirs
  6858 0000A265 E826E8FFFF          <1> 	call	find_first_file
  6859                              <1> 	; ESI = Directory Entry (FindFile_DirEntry) Location
  6860                              <1> 	; EDI = Directory Buffer Directory Entry Location
  6861                              <1> 	; EAX = File size
  6862                              <1> 	;jnc	loc_load_and_run_file
  6863                              <1> 	; 25/07/2022
  6864 0000A26A 7205                <1> 	jc	short loc_run_program_file_not_found
  6865 0000A26C E949010000          <1> 	jmp	loc_load_and_run_file
  6866                              <1> 
  6867                              <1> loc_run_program_file_not_found:	 
  6868 0000A271 3C02                <1> 	cmp	al, 2 ; file not found
  6869                              <1> 	;jne	loc_run_cmd_failed
  6870                              <1> 	; 25/07/2022
  6871 0000A273 7405                <1> 	je	short loc_run_progr_file_chk_prg_ext
  6872 0000A275 E95AE3FFFF          <1> 	jmp	loc_run_cmd_failed
  6873                              <1> 
  6874                              <1> loc_run_progr_file_chk_prg_ext: ; 25/07/2022
  6875 0000A27A 66A1[C2830100]      <1> 	mov	ax, word [EXE_ID]
  6876 0000A280 80FC2E              <1> 	cmp	ah, '.' ; File name has extension sign
  6877 0000A283 7424                <1> 	je	short loc_run_check_auto_path
  6878                              <1> 
  6879 0000A285 08C0                <1> 	or	al, al
  6880 0000A287 7520                <1> 	jnz	short loc_run_check_auto_path
  6881                              <1> 
  6882 0000A289 80FC08              <1> 	cmp	ah, 8 ; count of file name chars
  6883 0000A28C 771B                <1> 	ja	short loc_run_check_auto_path
  6884                              <1> 
  6885                              <1> loc_run_change_file_ext_to_prg:
  6886 0000A28E 0FB6DC              <1> 	movzx	ebx, ah ; count of file name chars
  6887 0000A291 BE[EC800100]        <1> 	mov	esi, FindFile_Name
  6888 0000A296 01F3                <1> 	add	ebx, esi	
  6889                              <1> 	; 07/05/2016
  6890 0000A298 C7032E505247        <1> 	mov	dword [ebx],  '.PRG'
  6891 0000A29E 66C705[C2830100]50- <1> 	mov	word [EXE_ID], 'P.'
  6891 0000A2A6 2E                  <1>
  6892 0000A2A7 EBB8                <1> 	jmp	short loc_run_find_program_file_next	
  6893                              <1> 
  6894                              <1> loc_run_check_auto_path:
  6895                              <1> 	; NOTE: /// 07/05/2016 ///
  6896                              <1> 	; If the path is given, value of byte [Run_Manual_Path]
  6897                              <1> 	; will not be ZERO. If so, file searching by using
  6898                              <1> 	; Automatic Path (via 'PATH' environment variable)
  6899                              <1> 	; will not be applicable, because the program file 
  6900                              <1> 	; is already/absolutely not found.
  6901                              <1> 
  6902 0000A2A9 A0[C1830100]        <1> 	mov	al, [Run_Manual_Path]
  6903 0000A2AE 08C0                <1> 	or	al, al
  6904                              <1> 	;jnz	loc_cmd_failed
  6905                              <1> 	; 25/07/2022
  6906 0000A2B0 7524                <1> 	jnz	short loc_run_cap_failed
  6907                              <1> 
  6908                              <1> loc_run_check_auto_path_again:
  6909 0000A2B2 66833D[C0830100]FF  <1> 	cmp	word [Run_Auto_Path], 0FFFFh		 
  6910                              <1> 		; 0FFFFh = Not a valid run path (in ENV block) 
  6911                              <1> 	;jnb	loc_cmd_failed
  6912                              <1> 	; 25/07/2022
  6913 0000A2BA 731A                <1> 	jnb	short loc_run_cap_failed
  6914                              <1> 	;xor	al, al 
  6915 0000A2BC BE[93300100]        <1> 	mov	esi, Cmd_Path ; 'PATH'
  6916 0000A2C1 BF[0A790100]        <1> 	mov	edi, TextBuffer
  6917 0000A2C6 E86DF9FFFF          <1> 	call	get_environment_string
  6918 0000A2CB 7310                <1> 	jnc	short loc_run_chk_filename_ext_again
  6919 0000A2CD 66C705[C0830100]FF- <1> 	mov	word [Run_Auto_Path], 0FFFFh ; invalid
  6919 0000A2D5 FF                  <1>
  6920                              <1> loc_run_cap_failed: ; 25/07/2022	
  6921                              <1> 	;jmp	loc_cmd_failed
  6922                              <1> 	; 30/08/2023
  6923 0000A2D6 B001                <1> 	mov	al, 1 ; (force jump to loc_cmd_failed at the end)
  6924 0000A2D8 E9F7E2FFFF          <1> 	jmp	loc_run_cmd_failed ; (restore cdir if it is needed)
  6925                              <1> 
  6926                              <1> loc_run_chk_filename_ext_again:
  6927 0000A2DD 89C1                <1> 	mov	ecx, eax ; string length (with zero tail)
  6928 0000A2DF 49                  <1> 	dec	ecx ; without zero tail
  6929 0000A2E0 66A1[C2830100]      <1> 	mov	ax, [EXE_ID]
  6930 0000A2E6 80FC2E              <1> 	cmp	ah, '.'
  6931 0000A2E9 740E                <1> 	je	short loc_run_chk_auto_path_pos
  6932                              <1> 	 
  6933                              <1> loc_run_change_file_ext_to_noext_again:
  6934 0000A2EB 0FB6DC              <1> 	movzx	ebx, ah
  6935 0000A2EE BE[EC800100]        <1> 	mov	esi, FindFile_Name
  6936 0000A2F3 01F3                <1> 	add 	ebx, esi
  6937 0000A2F5 29C0                <1> 	sub	eax, eax
  6938 0000A2F7 8903                <1> 	mov	[ebx], eax ; 0 ; erase extension (.PRG)
  6939                              <1> 
  6940                              <1> loc_run_chk_auto_path_pos:
  6941                              <1> 	;movzx	eax,  word [Run_Auto_Path]
  6942 0000A2F9 66A1[C0830100]      <1> 	mov	ax, [Run_Auto_Path]
  6943 0000A2FF 39C8                <1> 	cmp	eax, ecx ; ecx = string length (except zero tail)
  6944                              <1> 	;jnb	loc_cmd_failed
  6945                              <1>  	; 25/07/2022
  6946 0000A301 73D3                <1> 	jnb	short loc_run_cap_failed
  6947                              <1> 
  6948                              <1> 	;or	eax, eax
  6949 0000A303 6609C0              <1> 	or	ax, ax
  6950 0000A306 7502                <1> 	jnz	short loc_run_auto_path_pos_move
  6951 0000A308 B005                <1> 	mov	al, 5
  6952                              <1> 
  6953                              <1> loc_run_auto_path_pos_move:
  6954 0000A30A 89FE                <1> 	mov	esi, edi ; offset TextBuffer
  6955 0000A30C 01C6                <1> 	add	esi, eax
  6956                              <1> 
  6957                              <1> loc_run_auto_path_pos_space_loop:
  6958 0000A30E AC                  <1> 	lodsb
  6959 0000A30F 3C20                <1> 	cmp	al, 20h 
  6960 0000A311 74FB                <1> 	je	short loc_run_auto_path_pos_space_loop
  6961                              <1> 	;jb	loc_cmd_failed
  6962                              <1>  	; 25/07/2022
  6963 0000A313 72C1                <1> 	jb	short loc_run_cap_failed
  6964                              <1> 	;
  6965 0000A315 AA                  <1> 	stosb
  6966                              <1> loc_run_auto_path_pos_move_next: 
  6967 0000A316 AC                  <1> 	lodsb
  6968 0000A317 3C3B                <1> 	cmp	al, ';'
  6969 0000A319 7414                <1> 	je	short loc_run_auto_path_pos_move_last_byte
  6970 0000A31B 3C20                <1> 	cmp	al, 20h
  6971 0000A31D 74F7                <1> 	je	short loc_run_auto_path_pos_move_next
  6972 0000A31F 7203                <1> 	jb	short loc_byte_ptr_end_of_path
  6973 0000A321 AA                  <1> 	stosb
  6974 0000A322 EBF2                <1> 	jmp	short loc_run_auto_path_pos_move_next 
  6975                              <1> 
  6976                              <1> loc_byte_ptr_end_of_path: 
  6977 0000A324 66C705[C0830100]FF- <1> 	mov	word [Run_Auto_Path], 0FFFFh ; end of path
  6977 0000A32C FF                  <1>
  6978 0000A32D EB0D                <1> 	jmp	short loc_run_auto_path_move_ok 
  6979                              <1> 
  6980                              <1> loc_run_auto_path_pos_move_last_byte:
  6981 0000A32F 89F0                <1> 	mov	eax, esi
  6982 0000A331 2D[0A790100]        <1> 	sub	eax, TextBuffer 
  6983 0000A336 66A3[C0830100]      <1> 	mov	[Run_Auto_Path], ax ; next path position
  6984                              <1> 
  6985                              <1> loc_run_auto_path_move_ok:
  6986 0000A33C 4F                  <1> 	dec	edi
  6987 0000A33D B02F                <1> 	mov	al, '/'
  6988 0000A33F 3807                <1> 	cmp	[edi], al
  6989 0000A341 7403                <1> 	je	short loc_run_auto_path_move_file_name
  6990 0000A343 47                  <1> 	inc	edi
  6991 0000A344 8807                <1> 	mov	[edi], al
  6992                              <1> 
  6993                              <1> loc_run_auto_path_move_file_name:
  6994 0000A346 47                  <1> 	inc	edi   
  6995 0000A347 BE[EC800100]        <1> 	mov	esi, FindFile_Name
  6996                              <1> 
  6997                              <1> loc_run_auto_path_move_fn_loop:
  6998 0000A34C AC                  <1> 	lodsb
  6999 0000A34D AA                  <1> 	stosb
  7000 0000A34E 08C0                <1> 	or	al, al
  7001 0000A350 75FA                <1> 	jnz	short loc_run_auto_path_move_fn_loop
  7002                              <1> 
  7003 0000A352 BE[0A790100]        <1> 	mov	esi, TextBuffer
  7004 0000A357 BF[AA800100]        <1> 	mov	edi, FindFile_Drv
  7005 0000A35C E8F3070000          <1> 	call	parse_path_name
  7006                              <1> 	;jc	loc_run_cmd_failed
  7007                              <1> 	; 25/07/2022
  7008                              <1> 	;jnc	short loc_run_change_current_drive
  7009                              <1> 	;jmp	loc_run_cmd_failed
  7010 0000A361 7234                <1> 	jc	short loc_run_path_failed
  7011                              <1> 
  7012                              <1> loc_run_change_current_drive: 
  7013 0000A363 8A35[0A780100]      <1> 	mov	dh, [Current_Drv]
  7014 0000A369 8A15[AA800100]      <1> 	mov	dl, [FindFile_Drv]
  7015 0000A36F 38F2                <1> 	cmp	dl, dh
  7016 0000A371 7407                <1> 	je	short loc_run_change_directory_again
  7017                              <1>              
  7018 0000A373 E86AD4FFFF          <1> 	call	change_current_drive
  7019                              <1> 	;jc	loc_run_cmd_failed
  7020                              <1> 	; 25/07/2022
  7021                              <1> 	;jnc	short loc_run_change_directory_again
  7022                              <1> 	;jmp	loc_run_cmd_failed
  7023 0000A378 721D                <1> 	jc	short loc_run_path_failed
  7024                              <1> 
  7025                              <1> loc_run_change_directory_again:
  7026 0000A37A 803D[AB800100]20    <1> 	cmp	byte [FindFile_Directory], 20h
  7027 0000A381 761E                <1> 	jna	short loc_load_executable_cdir_chk_again
  7028                              <1> 
  7029 0000A383 FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  7030 0000A389 BE[AB800100]        <1> 	mov	esi, FindFile_Directory
  7031 0000A38E 30E4                <1> 	xor	ah, ah ; CD_COMMAND sign -> 0 
  7032 0000A390 E8D3010000          <1> 	call	change_current_directory
  7033                              <1> 	;jc	loc_run_cmd_failed
  7034                              <1> 	; 25/07/2022
  7035 0000A395 7305                <1> 	jnc	short loc_run_chg_prompt_dir_str_again
  7036                              <1> loc_run_path_failed: ; 25/07/2022
  7037 0000A397 E938E2FFFF          <1> 	jmp	loc_run_cmd_failed
  7038                              <1> 
  7039                              <1> loc_run_chg_prompt_dir_str_again:
  7040 0000A39C E8F0000000          <1> 	call	change_prompt_dir_string
  7041                              <1> 
  7042                              <1> loc_load_executable_cdir_chk_again:
  7043 0000A3A1 A1[04780100]        <1> 	mov	eax, [Current_Dir_FCluster]
  7044 0000A3A6 3B05[BC830100]      <1> 	cmp	eax, [Run_CDirFC]
  7045                              <1> 	;jne	loc_run_find_executable_file_next
  7046                              <1> 	; 30/08/2023
  7047 0000A3AC 7405                <1> 	je	short jmp_loc_run_check_auto_path_again
  7048 0000A3AE E9A9FEFFFF          <1> 	jmp	loc_run_find_executable_file_next		
  7049                              <1> jmp_loc_run_check_auto_path_again:
  7050 0000A3B3 30C0                <1> 	xor	al, al ; 0
  7051 0000A3B5 E9F8FEFFFF          <1> 	jmp	loc_run_check_auto_path_again
  7052                              <1> 
  7053                              <1> loc_load_and_run_file:
  7054                              <1> 	; 25/07/2022 - TRDOS 386 Kernel v2.0.5
  7055                              <1> 	; 13/11/2017
  7056                              <1> 	; 04/01/2017
  7057                              <1> 	; 23/04/2016
  7058 0000A3BA BE[EC800100]        <1> 	mov	esi, FindFile_Name
  7059 0000A3BF BF[0A790100]        <1> 	mov	edi, TextBuffer
  7060                              <1> 
  7061                              <1>  	; 24/04/2016
  7062 0000A3C4 31D2                <1> 	xor	edx, edx
  7063                              <1> 	;mov	word [argc], dx ; 0
  7064                              <1> 	; 25/07/2022
  7065 0000A3C6 8915[14020300]      <1> 	mov	dword [argc], edx
  7066 0000A3CC 8915[48010300]      <1> 	mov	dword [u.nread], edx ; 0
  7067                              <1> 
  7068                              <1> loc_load_and_run_file_1:
  7069 0000A3D2 AC                  <1> 	lodsb	
  7070 0000A3D3 AA                  <1> 	stosb
  7071 0000A3D4 FF05[48010300]      <1> 	inc	dword [u.nread]
  7072 0000A3DA 20C0                <1> 	and	al, al
  7073 0000A3DC 75F4                <1> 	jnz 	short loc_load_and_run_file_1
  7074                              <1> 	
  7075 0000A3DE A0[6B780100]        <1> 	mov	al, [CmdArgStart]
  7076 0000A3E3 20C0                <1> 	and	al, al
  7077 0000A3E5 7442                <1> 	jz	short loc_load_and_run_file_7
  7078                              <1> 
  7079 0000A3E7 0FB6F0              <1> 	movzx	esi, al ; 11/05/2016
  7080                              <1> 	;mov	ecx, 80
  7081                              <1> 	; 25/07/2022
  7082 0000A3EA 31C9                <1> 	xor	ecx, ecx
  7083 0000A3EC B150                <1> 	mov	cl, 80
  7084                              <1> 	;sub	ecx, esi
  7085 0000A3EE 28C1                <1> 	sub	cl, al
  7086 0000A3F0 81C6[BA780100]      <1> 	add	esi, CommandBuffer
  7087                              <1> 
  7088                              <1> 	;inc	word [argc] ; 11/05/2016
  7089                              <1> 	; 25/07/2022
  7090 0000A3F6 FF05[14020300]      <1> 	inc	dword [argc]
  7091                              <1> 
  7092                              <1> loc_load_and_run_file_2:
  7093 0000A3FC AC                  <1> 	lodsb
  7094 0000A3FD 3C20                <1> 	cmp	al, 20h
  7095 0000A3FF 7716                <1> 	ja	short loc_load_and_run_file_5	
  7096 0000A401 721D                <1> 	jb	short loc_load_and_run_file_6
  7097                              <1> 
  7098                              <1> loc_load_and_run_file_3:
  7099 0000A403 803E20              <1> 	cmp	byte [esi], 20h
  7100 0000A406 7707                <1> 	ja	short loc_load_and_run_file_4
  7101 0000A408 7216                <1> 	jb	short loc_load_and_run_file_6
  7102 0000A40A 46                  <1> 	inc	esi
  7103 0000A40B E2F6                <1> 	loop	loc_load_and_run_file_3
  7104 0000A40D EB11                <1> 	jmp	short loc_load_and_run_file_6
  7105                              <1> 
  7106                              <1> loc_load_and_run_file_4:
  7107 0000A40F 28C0                <1> 	sub	al, al ; 0
  7108                              <1> 	;inc	word [argc]
  7109                              <1> 	; 25/07/2022
  7110 0000A411 FF05[14020300]      <1> 	inc	dword [argc]
  7111                              <1> loc_load_and_run_file_5:
  7112 0000A417 AA                  <1> 	stosb
  7113 0000A418 FF05[48010300]      <1> 	inc	dword [u.nread]
  7114 0000A41E E2DC                <1> 	loop	loc_load_and_run_file_2
  7115                              <1> 			
  7116                              <1> loc_load_and_run_file_6:
  7117 0000A420 30C0                <1> 	xor	al, al ; 0
  7118 0000A422 AA                  <1> 	stosb
  7119 0000A423 FF05[48010300]      <1> 	inc	dword [u.nread]
  7120                              <1> loc_load_and_run_file_7:
  7121 0000A429 8807                <1> 	mov 	[edi], al ; 0
  7122                              <1> 	;inc	word [argc] ; 24/04/2016
  7123                              <1> 	; 25/07/2022
  7124 0000A42B FF05[14020300]      <1> 	inc	dword [argc]
  7125 0000A431 FF05[48010300]      <1> 	inc	dword [u.nread] ; 24/04/2016
  7126 0000A437 BE[0A790100]        <1> 	mov	esi, TextBuffer
  7127 0000A43C 8B15[18810100]      <1> 	mov	edx, [FindFile_DirEntry+DirEntry_FileSize]
  7128 0000A442 66A1[10810100]      <1> 	mov	ax, [FindFile_DirEntry+DirEntry_FstClusHI]
  7129 0000A448 C1E010              <1> 	shl	eax, 16 ; 13/11/2017
  7130 0000A44B 66A1[16810100]      <1> 	mov	ax, [FindFile_DirEntry+DirEntry_FstClusLO]
  7131                              <1> 	; EAX = First Cluster number
  7132                              <1> 	; EDX = File Size
  7133                              <1> 	; ESI = Argument list address
  7134                              <1> 	; [argc] = argument count
  7135                              <1> 	; [u.nread] = argument list length
  7136 0000A451 E8C5630000          <1> 	call	load_and_run_file ; trdosk6.s
  7137                              <1>         ;jc	loc_run_cmd_failed ; 04/01/2017
  7138                              <1> loc_load_and_run_file_8: ; 06/05/2016
  7139 0000A456 E949EAFFFF          <1> 	jmp	loc_file_rw_restore_retn
  7140                              <1> 
  7141                              <1> check_prg_filename_ext:
  7142                              <1> 	; 23/04/2016 (TRDOS 386 = TRDOS v2.0)
  7143                              <1> 	; 10/09/2011 
  7144                              <1> 	; (TRDOS v1, CMDINTR.ASM, 'proc_check_exe_filename_ext')
  7145                              <1> 	; 14/11/2009
  7146                              <1> 	; INPUT -> 
  7147                              <1> 	;	ESI = Dot File Name
  7148                              <1> 	; OUTPUT ->
  7149                              <1> 	;     cf = 0 -> EXE_ID in AL
  7150                              <1> 	;	ESI = Last char + 1 position
  7151                              <1> 	;     cf = 1 -> Invalid executable file name
  7152                              <1> 	;	or no file name extension if AH<=8
  7153                              <1> 	;	AL = Last file name char     
  7154                              <1> 	;     cf = 0 -> AL='P' (PRG), AL=0 (no extension)
  7155                              <1> 	;
  7156                              <1> 	; (Modified registers: EAX, ESI)
  7157                              <1>   
  7158 0000A45B 30E4                <1> 	xor	ah, ah
  7159                              <1> loc_run_check_filename_ext:	
  7160 0000A45D AC                  <1> 	lodsb
  7161 0000A45E 3C21                <1> 	cmp	al, 21h
  7162 0000A460 7229                <1> 	jb	short loc_check_exe_fn_retn 
  7163 0000A462 FEC4                <1> 	inc	ah
  7164 0000A464 3C2E                <1> 	cmp	al, '.'
  7165 0000A466 75F5                <1> 	jne	short loc_run_check_filename_ext	
  7166                              <1> 		 
  7167                              <1> loc_run_check_filename_ext_dot:
  7168 0000A468 80FC02              <1> 	cmp	ah, 2  ; .??? is not valid
  7169 0000A46B 88C4                <1> 	mov	ah, al ; '.' 
  7170 0000A46D 7219                <1> 	jb	short loc_check_prg_fn_retn
  7171                              <1> 
  7172                              <1> loc_run_check_filename_ext_dot_ok:
  7173 0000A46F AC                  <1> 	lodsb
  7174 0000A470 24DF                <1> 	and	al, 0DFh 
  7175                              <1> 
  7176                              <1> loc_run_check_filename_ext_prg:
  7177 0000A472 3C50                <1> 	cmp	al, 'P'
  7178 0000A474 7212                <1> 	jb	short loc_check_prg_fn_retn
  7179 0000A476 7711                <1> 	ja	short loc_check_prg_fn_stc
  7180 0000A478 AC                  <1> 	lodsb
  7181 0000A479 24DF                <1> 	and	al, 0DFh 
  7182 0000A47B 3C52                <1> 	cmp	al, 'R'
  7183 0000A47D 750A                <1> 	jne	short loc_check_prg_fn_stc
  7184 0000A47F AC                  <1> 	lodsb
  7185 0000A480 24DF                <1> 	and	al, 0DFh
  7186 0000A482 3C47                <1> 	cmp	al, 'G'
  7187 0000A484 7503                <1> 	jne	short loc_check_prg_fn_stc
  7188                              <1> 
  7189 0000A486 B050                <1> 	mov	al, 'P'
  7190                              <1> loc_check_prg_fn_retn:
  7191 0000A488 C3                  <1> 	retn
  7192                              <1> 
  7193                              <1> ; 25/07/2022 - TRDOS 386 Kernel v2.0.5
  7194                              <1> 
  7195                              <1> loc_check_prg_fn_stc:
  7196 0000A489 F9                  <1> 	stc
  7197 0000A48A C3                  <1> 	retn
  7198                              <1>  
  7199                              <1> loc_check_exe_fn_retn:
  7200 0000A48B 28C0                <1> 	sub	al, al ; 0
  7201                              <1> 	;retn
  7202                              <1>               
  7203                              <1> find_and_list_files:
  7204                              <1> 	;retn
  7205                              <1> set_exec_arguments:
  7206 0000A48D C3                  <1> 	retn
  7207                              <1> 
  7208                              <1> delete_fs_directory:
  7209 0000A48E 31C0                <1> 	xor	eax, eax
  7210 0000A490 C3                  <1> 	retn
  3310                                  %include 'trdosk4.s' ; 24/01/2016
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.6) - Directory Functions : trdosk4.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 29/08/2023  (Previous: 11/08/2022)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 24/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Derived from TRDOS Operating System v1.0 (8086) source code by Erdogan Tan
    11                              <1> ; DIR.ASM (09/10/2011)
    12                              <1> ; ****************************************************************************
    13                              <1> 
    14                              <1> ; DIR.ASM  [ TRDOS KERNEL - COMMAND EXECUTER SECTION - DIRECTORY FUNCTIONS ]
    15                              <1> ; (c) 2004-2010  Erdogan TAN  [ 17/01/2004 ]  Last Update: 09/10/2011
    16                              <1> ; FILE.ASM [ FILE FUNCTIONS ] Last Update: 09/10/2011
    17                              <1> 
    18                              <1> change_prompt_dir_string:
    19                              <1> 	; 05/10/2016
    20                              <1> 	; 24/01/2016 (TRDOS 386 = TRDOS v2.0)
    21                              <1> 	; 27/03/2011
    22                              <1> 	; 09/10/2009
    23                              <1> 	; INPUT/OUTPUT => none
    24                              <1> 	; this procedure changes current directory string/text  
    25                              <1> 	; 2005
    26                              <1> 
    27 0000A491 BE[687F0100]        <1> 	mov	esi, PATH_Array
    28                              <1> change_prompt_dir_str: ; 05/10/2016 (call from 'set_working_path')
    29 0000A496 BF[0E780100]        <1> 	mov	edi, Current_Directory
    30 0000A49B 8A25[08780100]      <1> 	mov	ah, [Current_Dir_Level]
    31 0000A4A1 E807000000          <1> 	call	set_current_directory_string
    32 0000A4A6 880D[69780100]      <1> 	mov	[Current_Dir_StrLen], cl
    33                              <1> 
    34 0000A4AC C3                  <1> 	retn
    35                              <1> 
    36                              <1> set_current_directory_string:
    37                              <1> 	; 11/08/2022 (TRDOS 386 Kernel v2.0.5)
    38                              <1> 	; 24/01/2016 (TRDOS 386 = TRDOS v2.0)
    39                              <1> 	; 27/03/2011
    40                              <1> 	; 09/10/2009
    41                              <1> 	; INPUT:
    42                              <1> 	;    ESI = Path Array Address 
    43                              <1> 	;    EDI = Current Directory String Buffer
    44                              <1> 	;    AH = Current Directory Level
    45                              <1> 	; OUTPUT => EAX, EBX, ESI will be changed
    46                              <1> 	;    EDI will be same with input
    47                              <1> 	;    ECX = Current Directory String Length 
    48                              <1> 
    49 0000A4AD 57                  <1> 	push    edi
    50 0000A4AE 80FC00              <1> 	cmp     ah, 0
    51 0000A4B1 7651                <1> 	jna	short pass_write_path
    52 0000A4B3 83C610              <1> 	add	esi, 16
    53 0000A4B6 89F3                <1> 	mov	ebx, esi
    54                              <1> loc_write_path:
    55                              <1> 	;mov	ecx, 8
    56                              <1> 	; 11/08/2022
    57 0000A4B8 29C9                <1> 	sub	ecx, ecx
    58 0000A4BA B108                <1> 	mov	cl, 8
    59                              <1> path_write_dirname1:
    60 0000A4BC AC                  <1> 	lodsb
    61 0000A4BD 3C20                <1> 	cmp	al, 20h
    62 0000A4BF 7612                <1> 	jna	short pass_write_dirname1
    63 0000A4C1 AA                  <1> 	stosb
    64 0000A4C2 81FF[68780100]      <1> 	cmp	edi, End_Of_Current_Dir_Str
    65 0000A4C8 733A                <1> 	jnb	short pass_write_path
    66 0000A4CA E2F0                <1> 	loop	path_write_dirname1
    67 0000A4CC 803E20              <1> 	cmp	byte [esi], 20h
    68 0000A4CF 7624                <1> 	jna	short pass_write_dirname2
    69 0000A4D1 EB0A                <1> 	jmp     short loc_put_dot_cont_ext
    70                              <1> pass_write_dirname1:
    71 0000A4D3 89DE                <1> 	mov	esi, ebx
    72 0000A4D5 83C608              <1> 	add	esi, 8
    73 0000A4D8 803E20              <1> 	cmp	byte [esi], 20h
    74 0000A4DB 7618                <1> 	jna	short pass_write_dirname2
    75                              <1> loc_put_dot_cont_ext:
    76 0000A4DD C6072E              <1> 	mov	byte [edi], "."
    77                              <1> 	;mov	ecx, 3
    78 0000A4E0 B103                <1> 	mov	cl, 3
    79                              <1> loc_check_dir_name_ext:
    80 0000A4E2 AC                  <1> 	lodsb
    81 0000A4E3 47                  <1> 	inc	edi
    82 0000A4E4 3C20                <1> 	cmp	al, 20h
    83 0000A4E6 760D                <1> 	jna	short pass_write_dirname2
    84 0000A4E8 8807                <1> 	mov	[edi], al
    85 0000A4EA 81FF[68780100]      <1> 	cmp	edi, End_Of_Current_Dir_Str
    86 0000A4F0 7312                <1> 	jnb	short pass_write_path
    87 0000A4F2 E2EE                <1> 	loop    loc_check_dir_name_ext
    88 0000A4F4 47                  <1> 	inc	edi
    89                              <1> pass_write_dirname2:
    90 0000A4F5 FECC                <1> 	dec	ah
    91 0000A4F7 740B                <1> 	jz      short pass_write_path
    92 0000A4F9 83C310              <1> 	add	ebx, 16
    93 0000A4FC 89DE                <1> 	mov	esi, ebx
    94 0000A4FE C6072F              <1> 	mov	byte [edi],"/"
    95 0000A501 47                  <1> 	inc	edi
    96 0000A502 EBB4                <1> 	jmp	short loc_write_path
    97                              <1> pass_write_path:
    98 0000A504 C60700              <1> 	mov	byte [edi], 0
    99 0000A507 47                  <1> 	inc	edi
   100 0000A508 89F9                <1> 	mov	ecx, edi
   101 0000A50A 5F                  <1> 	pop	edi
   102 0000A50B 29F9                <1> 	sub	ecx, edi
   103                              <1> 	; ECX = Current Directory String Length
   104 0000A50D C3                  <1> 	retn
   105                              <1> 
   106                              <1> get_current_directory:
   107                              <1> 	; 29/08/2023 (TRDOS 386 Kernel v2.0.6)
   108                              <1> 	; 11/08/2022
   109                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
   110                              <1> 	; 15/10/2016
   111                              <1> 	; 14/02/2016
   112                              <1> 	; 24/01/2016 (TRDOS 386 = TRDOS v2.0)
   113                              <1> 	; 27/03/2011
   114                              <1> 	;
   115                              <1> 	; INPUT-> ESI = Current Directory Buffer
   116                              <1> 	;         DL = TRDOS Logical Dos Drive Number + 1
   117                              <1> 	;              (0 = Default/Current Drive)
   118                              <1> 	;           
   119                              <1> 	;   Note: Required dir buffer length may be <= 92 bytes
   120                              <1> 	;         for TRDOS (7*12 name chars + 7 slash + 0)
   121                              <1> 	; OUTPUT ->  ESI = Current Directory Buffer
   122                              <1> 	;            EAX, EBX, ECX, EDX, EDI will be changed
   123                              <1> 	;            CX/CL = Current Directory String Length
   124                              <1> 	;	     DL = Drive Number (0 based)
   125                              <1> 	;            (If input is 0, output is current drv number) 
   126                              <1> 	;            DH = same with input 
   127                              <1> 	;   cf = 0 -> AL = 0
   128                              <1> 	;   cf = 1 -> error code in AL 
   129                              <1>               
   130                              <1> loc_get_current_drive_0:
   131                              <1> 	; 29/08/2023
   132 0000A50E 29C0                <1> 	sub	eax, eax ; 0
   133                              <1> 	;cmp	dl, 0
   134 0000A510 38C2                <1> 	cmp	dl, al
   135 0000A512 7724                <1> 	ja	short loc_get_current_drive_1
   136 0000A514 8A15[0A780100]      <1> 	mov	dl, [Current_Drv]
   137                              <1> 	; 29/08/2023
   138                              <1> 	;jmp	short loc_get_current_drive_2
   139                              <1>  
   140                              <1> loc_get_current_drive_2:
   141                              <1> 	; 29/08/2023
   142                              <1> 	;xor	eax, eax
   143                              <1> 	; eax = 0
   144 0000A51A 88D4                <1> 	mov	ah, dl
   145 0000A51C 56                  <1> 	push	esi ; (*)
   146 0000A51D BE00010900          <1> 	mov	esi, Logical_DOSDisks
   147 0000A522 01C6                <1> 	add	esi, eax
   148 0000A524 8A06                <1> 	mov	al, [esi+LD_Name] 
   149 0000A526 3C41                <1> 	cmp	al, 'A'
   150 0000A528 721C                <1> 	jb	short loc_get_current_drive_not_ready_retn
   151                              <1> 
   152                              <1> 	; 28/07/2022
   153 0000A52A 31C9                <1> 	xor	ecx, ecx
   154                              <1> 
   155 0000A52C 8A667F              <1> 	mov	ah, [esi+LD_CDirLevel]
   156 0000A52F 08E4                <1> 	or	ah, ah
   157 0000A531 7519                <1> 	jnz	short loc_get_current_drive_3
   158                              <1> 
   159                              <1> 	;xor	ah, ah ; mov ah, 0
   160                              <1> 	
   161                              <1> 	; 11/08/2022 - BugFix (*)
   162 0000A533 5E                  <1> 	pop	esi ; (*) Current Directory Buffer address
   163                              <1> 	
   164 0000A534 8826                <1> 	mov	[esi], ah
   165                              <1> 	; 28/07/2022
   166                              <1> 	;xor	ecx, ecx
   167 0000A536 EB2D                <1> 	jmp	short loc_get_current_drive_4
   168                              <1> 
   169                              <1> 	; 29/08/2023
   170                              <1> loc_get_current_drive_1:
   171 0000A538 FECA                <1> 	dec 	dl
   172 0000A53A 3A15[BE2F0100]      <1> 	cmp	dl, [Last_DOS_DiskNo]
   173 0000A540 76D8                <1> 	jna	short loc_get_current_drive_2
   174                              <1> 	;mov	eax, 0Fh ; Invalid drive (Drive not ready!)
   175                              <1> 	;cmc 	; stc
   176                              <1> 	; 28/07/2022
   177                              <1> 	;sub	eax, eax ; 29/08/2023
   178                              <1> 	; eax = 0
   179 0000A542 B00F                <1> 	mov	al, 0Fh
   180 0000A544 F9                  <1> 	stc
   181 0000A545 C3                  <1> 	retn
   182                              <1> 
   183                              <1> loc_get_current_drive_not_ready_retn:
   184 0000A546 5E                  <1> 	pop	esi
   185                              <1> 	;mov	eax, 15
   186 0000A547 66B80F00            <1> 	mov	ax, 15 ; Drive not ready
   187 0000A54B C3                  <1> 	retn 
   188                              <1> 
   189                              <1> loc_get_current_drive_3:
   190 0000A54C BF[687F0100]        <1>         mov     edi, PATH_Array
   191 0000A551 57                  <1> 	push	edi
   192 0000A552 81C680000000        <1> 	add	esi, LD_CurrentDirectory
   193                              <1> 	;mov	ecx, 32
   194                              <1> 	; 28/07/2022
   195 0000A558 B120                <1> 	mov	cl, 32
   196 0000A55A F3A5                <1> 	rep	movsd
   197 0000A55C 5E                  <1> 	pop	esi ; Path Array Address
   198 0000A55D 5F                  <1> 	pop	edi ; pushed esi (current dir buffer offset) 
   199                              <1> 	;
   200 0000A55E E84AFFFFFF          <1> 	call	set_current_directory_string
   201 0000A563 89FE                <1> 	mov	esi, edi
   202                              <1> 
   203                              <1> loc_get_current_drive_4:
   204 0000A565 30C0                <1> 	xor	al, al
   205 0000A567 C3                  <1> 	retn
   206                              <1> 
   207                              <1> change_current_directory:
   208                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
   209                              <1> 	; 02/03/2021 (TRDOS 386 v2.0.3) ((BugFix))
   210                              <1> 	; 19/02/2016
   211                              <1> 	; 11/02/2016
   212                              <1> 	; 10/02/2016
   213                              <1> 	; 08/02/2016
   214                              <1> 	; 06/02/2016 (TRDOS 386 = TRDOS v2.0)
   215                              <1> 	; 18/09/2011 (DIR.ASM, 09/10/2011)	
   216                              <1> 	; 04/10/2009
   217                              <1> 	; 2005
   218                              <1> 	; INPUT -> 
   219                              <1> 	;	ESI = Directory string
   220                              <1> 	;	ah = CD command (CDh = save current dir string)
   221                              <1> 	; OUTPUT -> 
   222                              <1> 	; 	EDI = DOS Drive Description Table
   223                              <1> 	; 	cf = 1 -> error
   224                              <1> 	;	   EAX = Error code
   225                              <1> 	;	cf = 0 -> successful
   226                              <1> 	;	   ESI = PATH_Array
   227                              <1> 	;	   EAX = Current Directory First Cluster
   228                              <1> 	;
   229                              <1> 	; (EAX, EBX, ECX, EDX, ESI, EDI will be changed)
   230                              <1> 	
   231 0000A568 8825[F67F0100]      <1> 	mov	[CD_COMMAND], ah
   232 0000A56E 803E2F              <1> 	cmp	byte [esi], '/'
   233 0000A571 7505                <1> 	jne	short loc_ccd_cdir_level
   234 0000A573 46                  <1> 	inc	esi
   235 0000A574 30C0                <1> 	xor	al, al
   236 0000A576 EB05                <1> 	jmp	short loc_ccd_parse_path_name
   237                              <1> loc_ccd_cdir_level:
   238 0000A578 A0[08780100]        <1> 	mov	al, [Current_Dir_Level]
   239                              <1> loc_ccd_parse_path_name:
   240 0000A57D 88C4                <1> 	mov	ah, al
   241 0000A57F BF[687F0100]        <1> 	mov	edi, PATH_Array
   242                              <1> 
   243                              <1> ; Reset directory levels > cdir level
   244                              <1> 	; is this required !?
   245                              <1> 	;
   246                              <1> 	; Relations:
   247                              <1> 	; MAINPROG.ASM (pass_ccdrv_reset_cdir_FAT_fcluster)
   248                              <1> 	; proc_parse_dir_name,
   249                              <1> 	; proc_change_current_directory (this procedure)
   250                              <1> 	; proc_change_prompt_dir_string 
   251                              <1>  
   252 0000A584 0FB6C8              <1> 	movzx	ecx, al
   253 0000A587 FEC1                <1> 	inc	cl
   254 0000A589 C0E104              <1> 	shl	cl, 4
   255 0000A58C 01CF                <1> 	add	edi, ecx
   256 0000A58E B107                <1> 	mov	cl, 7
   257 0000A590 28C1                <1> 	sub	cl, al
   258 0000A592 C0E102              <1> 	shl	cl, 2
   259 0000A595 89C3                <1> 	mov	ebx, eax
   260 0000A597 31C0                <1> 	xor	eax, eax ; 0
   261 0000A599 F3AB                <1> 	rep	stosd
   262 0000A59B 89D8                <1> 	mov	eax, ebx
   263                              <1> 
   264 0000A59D BF[687F0100]        <1> 	mov	edi, PATH_Array
   265                              <1> 
   266 0000A5A2 803E20              <1> 	cmp	byte [esi], 20h
   267 0000A5A5 F5                  <1> 	cmc
   268 0000A5A6 7305                <1> 	jnc	short pass_ccd_parse_dir_name
   269                              <1> 
   270                              <1> 		; ESI = Path name
   271                              <1> 		; AL = CCD_Level
   272 0000A5A8 E871010000          <1>         call    parse_dir_name
   273                              <1> 		; AL = CCD_Level 
   274                              <1> 		; AH = Last_Dir_Level
   275                              <1> 		; (EDI = PATH_Array)
   276                              <1> 
   277                              <1> pass_ccd_parse_dir_name:
   278 0000A5AD 9C                  <1> 	pushf
   279                              <1> 
   280                              <1> 	;mov	[CCD_Level], al
   281                              <1>         ;mov	[Last_Dir_Level], ah
   282 0000A5AE 66A3[EC7F0100]      <1> 	mov	[CCD_Level], ax
   283                              <1> 
   284 0000A5B4 31DB                <1> 	xor	ebx, ebx
   285 0000A5B6 8A3D[0A780100]      <1> 	mov	bh, [Current_Drv]
   286 0000A5BC BE00010900          <1> 	mov	esi, Logical_DOSDisks
   287 0000A5C1 01DE                <1> 	add	esi, ebx
   288                              <1> 
   289 0000A5C3 9D                  <1> 	popf 
   290 0000A5C4 720A                <1> 	jc	short loc_ccd_bad_path_name_retn
   291                              <1> 
   292 0000A5C6 8935[E87F0100]      <1> 	mov	[CCD_DriveDT], esi
   293                              <1> 
   294 0000A5CC 3C07                <1> 	cmp	al, 7
   295 0000A5CE 7208                <1> 	jb	short loc_ccd_load_child_dir
   296                              <1> 
   297                              <1> loc_ccd_bad_path_name_retn:
   298 0000A5D0 87F7                <1> 	xchg	esi, edi
   299                              <1> 	;mov	eax, 19 ; Bad directory/path name 
   300                              <1> 	; 28/07/2022
   301 0000A5D2 29C0                <1> 	sub	eax, eax
   302 0000A5D4 B013                <1> 	mov	al, 19
   303 0000A5D6 F9                  <1> 	stc
   304                              <1> loc_ccd_retn_p:
   305 0000A5D7 C3                  <1> 	retn
   306                              <1> 
   307                              <1> loc_ccd_load_child_dir:
   308                              <1> 	; AL = CCD_Level
   309 0000A5D8 08C0                <1> 	or	al, al
   310 0000A5DA 7467                <1> 	jz	short loc_ccd_load_root_dir
   311                              <1> 
   312                              <1> 	;mov	cx, ax
   313                              <1> 	; 28/07/2022
   314 0000A5DC 89C1                <1> 	mov	ecx, eax
   315 0000A5DE C0E004              <1> 	shl	al, 4
   316 0000A5E1 0FB6F0              <1> 	movzx	esi, al
   317 0000A5E4 01FE                <1>      	add	esi, edi  ; offset PATH_Array
   318                              <1> 
   319 0000A5E6 8B460C              <1> 	mov	eax, [esi+12]
   320 0000A5E9 38E9                <1> 	cmp	cl, ch
   321                              <1> 	;je	loc_ccd_load_sub_directory
   322                              <1> 	; 28/07/2022
   323 0000A5EB 7505                <1> 	jne	short loc_ccd_1
   324 0000A5ED E9FA000000          <1> 	jmp	loc_ccd_load_sub_directory	
   325                              <1> 
   326                              <1> loc_ccd_1:	; 28/07/2022
   327 0000A5F2 A3[04780100]        <1> 	mov	[Current_Dir_FCluster], eax
   328                              <1> 
   329                              <1> loc_ccd_load_child_dir_next:
   330 0000A5F7 83C610              <1> 	add	esi, 16 ; DOS DirEntry Format FileName Address
   331                              <1> 
   332                              <1>  	; Directory attribute : 10h
   333 0000A5FA B010                <1> 	mov	al, 00010000b ; 10h (Attrib AND mask)
   334                              <1> 	;mov	ah, 11001000b ; C8h
   335                              <1> 	; Volume name attribute: 8h
   336 0000A5FC B408                <1> 	mov	ah, 00001000b ; 08h (Attrib NAND, AND --> zero mask)
   337                              <1> 
   338                              <1> 	;xor	cx, cx  
   339 0000A5FE 31C9                <1> 	xor	ecx, ecx ; 02/03/2021
   340 0000A600 E8B6010000          <1> 	call	locate_current_dir_file
   341 0000A605 7353                <1> 	jnc	short loc_ccd_set_dir_cluster_ptr
   342                              <1> 
   343                              <1> 	; 19/02/2016
   344                              <1> 	;mov	edi, [CCD_DriveDT]
   345 0000A607 8A25[EC7F0100]      <1> 	mov	ah, [CCD_Level]
   346 0000A60D 803D[F67F0100]CD    <1> 	cmp	byte [CD_COMMAND], 0CDh ;'CD' command or another
   347 0000A614 7509                <1> 	jne	short loc_ccd_load_child_dir_err
   348                              <1> 	; It is better to save recent successful part 
   349                              <1> 	; of the (requested) path as current directory.
   350                              <1> 	; (Otherwise the path would be reset to back
   351                              <1> 	; on the next 'CD' command.)
   352 0000A616 88E1                <1> 	mov	cl, ah
   353 0000A618 50                  <1> 	push	eax
   354 0000A619 E8E4000000          <1> 	call	loc_ccd_save_current_dir
   355 0000A61E 58                  <1> 	pop	eax
   356                              <1> loc_ccd_load_child_dir_err:            
   357 0000A61F 3C03                <1> 	cmp	al, 3	; AL = 2 => File not found error
   358 0000A621 7202                <1> 	jb	short loc_ccd_path_not_found_retn
   359 0000A623 F9                  <1> 	stc
   360 0000A624 C3                  <1> 	retn
   361                              <1> 
   362                              <1> loc_ccd_path_not_found_retn:
   363 0000A625 B003                <1> 	mov	al, 3	; Path not found
   364 0000A627 C3                  <1> 	retn
   365                              <1> 
   366                              <1> loc_ccd_load_FAT_root_dir:
   367 0000A628 803D[09780100]02    <1> 	cmp	byte [Current_FATType], 2
   368 0000A62F 776B                <1> 	ja	short loc_ccd_load_FAT32_root_dir
   369                              <1> 
   370                              <1> 	;mov	esi, [CCD_DriveDT]
   371                              <1> 	;push	esi
   372 0000A631 E80F1D0000          <1> 	call	load_FAT_root_directory
   373                              <1> 	;pop	edi ; Dos Drv Description Table
   374                              <1> 
   375 0000A636 89F7                <1> 	mov	edi, esi
   376 0000A638 BE[687F0100]        <1> 	mov	esi, PATH_Array
   377 0000A63D 7298                <1> 	jc	short loc_ccd_retn_p
   378                              <1> 
   379 0000A63F 31C0                <1> 	xor	eax, eax
   380 0000A641 EB78                <1>         jmp	short loc_ccd_set_cdfc
   381                              <1> 
   382                              <1> loc_ccd_load_root_dir:
   383 0000A643 803D[09780100]01    <1> 	cmp	byte [Current_FATType], 1
   384 0000A64A 73DC                <1> 	jnb	short loc_ccd_load_FAT_root_dir
   385                              <1> 
   386                              <1> loc_ccd_load_FS_root_dir:
   387 0000A64C E8AC1D0000          <1> 	call	load_FS_root_directory
   388 0000A651 EB5C                <1> 	jmp	short pass_ccd_load_FAT_sub_directory
   389                              <1> 
   390                              <1> loc_ccd_load_FS_sub_directory_next:
   391 0000A653 E8A51D0000          <1> 	call	load_FS_sub_directory
   392 0000A658 EB1F                <1> 	jmp	short pass_ccd_set_dir_cluster_ptr  
   393                              <1> 
   394                              <1> loc_ccd_set_dir_cluster_ptr:
   395                              <1> 	; EDI = Directory Entry
   396 0000A65A 668B4714            <1> 	mov	ax, [edi+20] ; First Cluster High Word
   397 0000A65E C1E010              <1> 	shl	eax, 16
   398 0000A661 668B471A            <1> 	mov	ax, [edi+26] ; First Cluster Low Word
   399                              <1> 
   400 0000A665 8B35[E87F0100]      <1> 	mov	esi, [CCD_DriveDT]
   401 0000A66B 803D[09780100]01    <1> 	cmp	byte [Current_FATType], 1
   402 0000A672 72DF                <1> 	jb	short loc_ccd_load_FS_sub_directory_next
   403                              <1> 	;push	esi
   404 0000A674 E84A1D0000          <1> 	call	load_FAT_sub_directory
   405                              <1> 	;pop	edi ; Dos Drv Description Table
   406                              <1> 
   407                              <1> pass_ccd_set_dir_cluster_ptr:
   408                              <1> 	;mov	edi, esi
   409 0000A679 BE[687F0100]        <1> 	mov	esi, PATH_Array
   410 0000A67E 7265                <1> 	jc	short loc_ccd_retn_c
   411                              <1> 
   412 0000A680 A1[367F0100]        <1> 	mov	eax, [DirBuff_Cluster]
   413                              <1> 
   414 0000A685 FE05[EC7F0100]      <1> 	inc	byte [CCD_Level]
   415 0000A68B 0FB61D[EC7F0100]    <1> 	movzx	ebx, byte [CCD_Level]
   416 0000A692 C0E304              <1> 	shl	bl, 4 ; * 16 (<= 128)   
   417 0000A695 01DE                <1> 	add	esi, ebx ; 19/02/2016
   418 0000A697 89460C              <1> 	mov	[esi+12], eax
   419 0000A69A EB1F                <1> 	jmp	short loc_ccd_set_cdfc
   420                              <1> 
   421                              <1> loc_ccd_load_FAT32_root_dir:
   422 0000A69C BE[687F0100]        <1> 	mov	esi, PATH_Array
   423 0000A6A1 8B460C              <1> 	mov	eax, [esi+12]
   424 0000A6A4 8B35[E87F0100]      <1> 	mov	esi, [CCD_DriveDT]
   425                              <1>  
   426                              <1> loc_ccd_load_FAT_sub_directory:
   427                              <1> 	;push	esi
   428 0000A6AA E8141D0000          <1> 	call	load_FAT_sub_directory
   429                              <1> 	;pop	edi ; Dos Drv Description Table
   430                              <1> 
   431                              <1> pass_ccd_load_FAT_sub_directory:
   432                              <1> 	;mov	edi, esi
   433 0000A6AF BE[687F0100]        <1> 	mov	esi, PATH_Array
   434 0000A6B4 722F                <1> 	jc	short loc_ccd_retn_c
   435                              <1> 
   436 0000A6B6 A1[367F0100]        <1> 	mov	eax, [DirBuff_Cluster]
   437                              <1> 
   438                              <1> loc_ccd_set_cdfc:
   439 0000A6BB 8A0D[EC7F0100]      <1> 	mov	cl, [CCD_Level]
   440 0000A6C1 880D[08780100]      <1> 	mov	[Current_Dir_Level], cl
   441 0000A6C7 A3[04780100]        <1> 	mov	[Current_Dir_FCluster], eax
   442                              <1> 
   443 0000A6CC 8A2D[ED7F0100]      <1> 	mov	ch, [Last_Dir_Level]
   444 0000A6D2 38E9                <1> 	cmp	cl, ch 
   445                              <1> 	;jb	loc_ccd_load_child_dir_next
   446                              <1> 	; 28/07/2022
   447 0000A6D4 7305                <1> 	jnb	short loc_ccd_2	
   448 0000A6D6 E91CFFFFFF          <1> 	jmp	loc_ccd_load_child_dir_next
   449                              <1> loc_ccd_2:
   450 0000A6DB 803D[F67F0100]CD    <1> 	cmp	byte [CD_COMMAND], 0CDh ;'CD' command or another
   451 0000A6E2 741E                <1> 	je	short loc_ccd_save_current_dir
   452                              <1> 
   453                              <1>         ; jne -> don't save, restore (the previous cdir) later !
   454                              <1>         ; (saving the cdir would prevent previous cdir restoration!)
   455                              <1> 
   456 0000A6E4 F8                  <1> 	clc
   457                              <1> 
   458                              <1> loc_ccd_retn_c:
   459 0000A6E5 8B3D[E87F0100]      <1> 	mov	edi, [CCD_DriveDT]
   460 0000A6EB C3                  <1> 	retn
   461                              <1> 
   462                              <1> loc_ccd_load_sub_directory:
   463 0000A6EC 8B35[E87F0100]      <1> 	mov	esi, [CCD_DriveDT]
   464 0000A6F2 803D[09780100]01    <1> 	cmp	byte [Current_FATType], 1
   465 0000A6F9 73AF                <1> 	jnb	short loc_ccd_load_FAT_sub_directory 
   466 0000A6FB E8FD1C0000          <1> 	call	load_FS_sub_directory
   467 0000A700 EBAD                <1> 	jmp	short pass_ccd_load_FAT_sub_directory 
   468                              <1> 
   469                              <1> loc_ccd_save_current_dir:
   470                              <1> 	; 02/03/2021 (TRDOS 386 v2.0.3) ((BugFix))
   471                              <1> 	; ('find_directory_entry' has been fixed to prevent large
   472                              <1> 	; ECX value > 65535)
   473                              <1> 	; 
   474 0000A702 BE[687F0100]        <1> 	mov	esi, PATH_Array ; 19/02/2016
   475 0000A707 8B3D[E87F0100]      <1> 	mov	edi, [CCD_DriveDT]
   476 0000A70D 57                  <1> 	push	edi
   477 0000A70E 83C77F              <1>         add     edi, LD_CDirLevel
   478 0000A711 880F                <1> 	mov	[edi], cl
   479 0000A713 47                  <1> 	inc	edi ; LD_CurrentDirectory 
   480 0000A714 56                  <1> 	push	esi
   481                              <1> 	;;mov	ecx, 32  ; always < 65536 (in this procedure)
   482 0000A715 66B92000            <1> 	mov	cx, 32
   483                              <1> 	; 02/03/2021
   484                              <1> 	;mov	ecx, 32
   485 0000A719 F3A5                <1> 	rep	movsd
   486                              <1> 	; Current directory has been saved to 
   487                              <1> 	; the DOS drive description table, cdir area !
   488 0000A71B 5E                  <1> 	pop	esi  ; PATH_Array
   489 0000A71C 5F                  <1> 	pop	edi  ; Dos Drv Description Table
   490                              <1> 
   491 0000A71D C3                  <1> 	retn
   492                              <1> 
   493                              <1> parse_dir_name:
   494                              <1> 	; 11/02/2016
   495                              <1> 	; 10/02/2016
   496                              <1> 	; 07/02/2016 (TRDOS 386 = TRDOS v2.0)
   497                              <1> 	; 18/09/2011
   498                              <1> 	; 17/10/2009
   499                              <1> 	; INPUT ->
   500                              <1> 	;	ESI = ASCIIZ Directory String Address
   501                              <1> 	;	AL = Current Directory Level
   502                              <1> 	;	EDI = Destination Adress
   503                              <1> 	;	     (8 levels, each one 12+4 byte)
   504                              <1> 	; OUTPUT ->
   505                              <1> 	;	EDI = Dir Entry Formatted Array
   506                              <1> 	;	     with zero cluster pointer at the last level
   507                              <1> 	;	AH = Last Dir Level
   508                              <1> 	;	AL = Current Dir Level
   509                              <1> 	;
   510                              <1> 	; (esi, ebx, ecx will be changed) 
   511                              <1> 
   512                              <1> 	;mov	[PATH_Array_Ptr], edi
   513 0000A71E 88C4                <1> 	mov	ah, al
   514 0000A720 66A3[8C800100]      <1> 	mov	[PATH_CDLevel], ax
   515                              <1> repeat_ppdn_check_slash:
   516 0000A726 AC                  <1> 	lodsb
   517 0000A727 3C2F                <1> 	cmp	al, '/'
   518 0000A729 74FB                <1> 	je	short repeat_ppdn_check_slash
   519 0000A72B 3C21                <1> 	cmp	al, 21h
   520 0000A72D 7219                <1> 	jb	short loc_ppdn_retn
   521 0000A72F 57                  <1> 	push	edi
   522                              <1> loc_ppdn_get_dir_name:
   523 0000A730 B90C000000          <1> 	mov	ecx, 12
   524 0000A735 BF[8E800100]        <1> 	mov	edi, Dir_File_Name
   525                              <1> repeat_ppdn_get_dir_name:
   526 0000A73A AA                  <1> 	stosb
   527 0000A73B AC                  <1> 	lodsb
   528 0000A73C 3C2F                <1> 	cmp	al, '/'
   529 0000A73E 740A                <1> 	je	short loc_check_level_dot_conv_dir_name
   530 0000A740 3C20                <1> 	cmp	al, 20h
   531 0000A742 7605                <1> 	jna	short loc_ppdn_end_of_path_scan
   532 0000A744 E2F4                <1> 	loop	repeat_ppdn_get_dir_name
   533 0000A746 5F                  <1> 	pop	edi
   534 0000A747 F9                  <1> 	stc
   535                              <1> loc_ppdn_retn:
   536 0000A748 C3                  <1> 	retn
   537                              <1> 
   538                              <1> loc_ppdn_end_of_path_scan:
   539 0000A749 4E                  <1> 	dec	esi
   540                              <1> loc_check_level_dot_conv_dir_name:
   541 0000A74A 31C0                <1> 	xor	eax, eax
   542 0000A74C AA                  <1> 	stosb
   543 0000A74D 89F3                <1> 	mov	ebx, esi
   544 0000A74F BE[8E800100]        <1> 	mov	esi, Dir_File_Name
   545 0000A754 AC                  <1> 	lodsb
   546                              <1> repeat_ppdn_name_check_dot:
   547 0000A755 3C2E                <1> 	cmp	al, '.'
   548 0000A757 7509                <1> 	jne	short loc_ppdn_convert_sub_dir_name
   549                              <1> repeat_ppdn_name_dot_dot:
   550 0000A759 AC                  <1> 	lodsb
   551 0000A75A 3C2E                <1> 	cmp	al, '.'
   552 0000A75C 743E                <1> 	je	short loc_ppdn_dot_dot
   553 0000A75E 3C21                <1> 	cmp	al, 21h
   554 0000A760 7226                <1> 	jb	short pass_ppdn_convert_sub_dir_name
   555                              <1> loc_ppdn_convert_sub_dir_name:
   556 0000A762 8A25[8D800100]      <1> 	mov	ah, [PATH_Level]
   557 0000A768 80FC07              <1> 	cmp	ah, 7
   558 0000A76B 731B                <1> 	jnb	short pass_ppdn_convert_sub_dir_name
   559 0000A76D FEC4                <1> 	inc	ah  
   560 0000A76F 8825[8D800100]      <1> 	mov	[PATH_Level], ah
   561 0000A775 BE[8E800100]        <1> 	mov	esi, Dir_File_Name
   562                              <1> 	;mov	edi, [PATH_Array_Ptr]
   563 0000A77A B010                <1> 	mov	al, 16
   564 0000A77C F6E4                <1> 	mul	ah
   565 0000A77E 8B3C24              <1> 	mov	edi, [esp]
   566                              <1> 	;push	edi 
   567 0000A781 01C7                <1> 	add	edi, eax
   568 0000A783 E802030000          <1> 	call	convert_file_name
   569                              <1> 	;pop	edi
   570                              <1> pass_ppdn_convert_sub_dir_name:
   571 0000A788 89DE                <1> 	mov	esi, ebx
   572                              <1> repeat_ppdn_check_last_slash:
   573 0000A78A AC                  <1> 	lodsb
   574 0000A78B 3C2F                <1> 	cmp	al, '/'
   575 0000A78D 74FB                <1> 	je	short repeat_ppdn_check_last_slash
   576 0000A78F 3C21                <1> 	cmp	al, 21h
   577 0000A791 739D                <1> 	jnb	short loc_ppdn_get_dir_name
   578                              <1> end_of_parse_dir_name:
   579 0000A793 5F                  <1> 	pop	edi
   580 0000A794 F5                  <1> 	cmc  
   581                              <1> 	;mov	al, [PATH_CDLevel]
   582                              <1> 	;mov	ah, [PATH_Level]
   583 0000A795 66A1[8C800100]      <1> 	mov	ax, [PATH_CDLevel]
   584 0000A79B C3                  <1> 	retn
   585                              <1> 
   586                              <1> loc_ppdn_dot_dot:
   587 0000A79C AC                  <1> 	lodsb
   588 0000A79D 3C21                <1> 	cmp	al, 21h
   589 0000A79F 73F2                <1> 	jnb	short end_of_parse_dir_name 
   590                              <1> loc_ppdn_dot_dot_prev_level:
   591 0000A7A1 66A1[8C800100]      <1> 	mov	ax, [PATH_CDLevel]
   592 0000A7A7 80EC01              <1> 	sub	ah, 1
   593 0000A7AA 80D400              <1> 	adc	ah, 0
   594 0000A7AD 38E0                <1> 	cmp	al, ah
   595 0000A7AF 7602                <1> 	jna	short pass_ppdn_set_al_to_ah
   596 0000A7B1 88E0                <1> 	mov	al, ah
   597                              <1> pass_ppdn_set_al_to_ah:
   598 0000A7B3 66A3[8C800100]      <1> 	mov	[PATH_CDLevel], ax
   599 0000A7B9 EBCD                <1> 	jmp	short pass_ppdn_convert_sub_dir_name
   600                              <1> 
   601                              <1> locate_current_dir_file:
   602                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
   603                              <1> 	; 20/11/2017
   604                              <1> 	; 14/02/2016
   605                              <1> 	; 13/02/2016
   606                              <1> 	; 10/02/2016
   607                              <1> 	; 06/02/2016 (TRDOS 386 = TRDOS v2.0)
   608                              <1> 	; 14/08/2010
   609                              <1> 	; 19/09/2009
   610                              <1>         ; 2005
   611                              <1> 	; INPUT ->
   612                              <1> 	;	ESI = DOS DirEntry Format FileName Address
   613                              <1> 	;	AL = Attributes Mask 
   614                              <1> 	;	(<AL AND EntryAttrib> must be equal to AL)
   615                              <1> 	;	AH = Negative Attributes Mask (If AH>0)
   616                              <1> 	;	(<AH AND EntryAttrib> must be ZERO)
   617                              <1> 	;	CH > 0 Find First Free Dir Entry or Deleted Entry
   618                              <1> 	;	CL = 0 -> Return the First Free Dir Entry
   619                              <1> 	;	CL = E5h -> Return the 1st deleted entry
   620                              <1> 	;	CL = FFh -> Return the 1st deleted or free entry
   621                              <1> 	;	CL > 0 and CL <> E5h and CL <> FFh -> Return the first 
   622                              <1> 	;	     proper entry (which fits with Atributes Masks)
   623                              <1> 	;	CX = 0 Find Valid File/Directory/VolumeName
   624                              <1> 	;	? = Any One Char
   625                              <1> 	;	* = Every Chars
   626                              <1> 	; OUTPUT ->
   627                              <1> 	;	EDI = Directory Entry Address (in Directory Buffer)
   628                              <1> 	;	ESI = DOS DirEntry Format FileName Address
   629                              <1> 	;	CF = 0 -> No Error, Proper Entry,
   630                              <1> 	;	DL = Attributes
   631                              <1> 	;	DH = Previous Entry Attr (LongName Check)
   632                              <1> 	;	AL > 0 -> Ambiguous filename wildcard "?" used
   633                              <1> 	;	AH > 0 -> Ambiguous filename wildcard "*" used
   634                              <1> 	;	AX = 0 -> Filename full fits with directory entry
   635                              <1> 	;	CH = The 1st Name Char of Current Dir Entry
   636                              <1> 	;	CF = 1 -> Proper entry not found, Error Code in EAX/AL
   637                              <1> 	;	CL = 0 and CH = 0 -> Free Entry (End Of Dir)
   638                              <1> 	;	CL = 0 and CH = E5h -> Deleted Entry fits with filters
   639                              <1> 	;	CL > 0 -> Entry not found, CH invalid
   640                              <1> 	;	CF = 0 -> 
   641                              <1> 	;	EBX = Current Directory Entry Index/Number (BX)
   642                              <1> 
   643                              <1> 	;mov	word [DirBuff_EntryCounter], 0 ; Zero Based
   644                              <1> 
   645 0000A7BB 8935[F07F0100]      <1> 	mov	[CDLF_FNAddress], esi
   646 0000A7C1 66A3[EE7F0100]      <1> 	mov	[CDLF_AttributesMask], ax
   647 0000A7C7 66890D[F47F0100]    <1> 	mov	[CDLF_DEType], cx
   648                              <1> 
   649 0000A7CE 31DB                <1> 	xor	ebx, ebx
   650 0000A7D0 881D[04800100]      <1> 	mov	[PreviousAttr], bl ; 0  ; 13/02/2016
   651                              <1> 
   652 0000A7D6 8A3D[0A780100]      <1> 	mov	bh, [Current_Drv]
   653 0000A7DC 381D[317F0100]      <1> 	cmp	byte [DirBuff_ValidData], bl ; 0
   654 0000A7E2 761D                <1> 	jna	short loc_lcdf_reload_current_dir2
   655 0000A7E4 8A1D[2F7F0100]      <1>         mov     bl, [DirBuff_DRV]
   656 0000A7EA 80EB41              <1> 	sub	bl, 'A'
   657 0000A7ED 38DF                <1> 	cmp	bh, bl
   658 0000A7EF 750E                <1> 	jne	short loc_lcdf_reload_current_dir1
   659 0000A7F1 8B15[367F0100]      <1> 	mov	edx, [DirBuff_Cluster]
   660 0000A7F7 3B15[04780100]      <1> 	cmp	edx, [Current_Dir_FCluster]
   661 0000A7FD 7412                <1> 	je	short loc_cdir_locatefile_search
   662                              <1> 
   663                              <1> loc_lcdf_reload_current_dir1:
   664 0000A7FF 30DB                <1> 	xor	bl, bl
   665                              <1> loc_lcdf_reload_current_dir2:
   666 0000A801 89DE                <1> 	mov	esi, ebx
   667 0000A803 81C600010900        <1>         add     esi, Logical_DOSDisks
   668 0000A809 E872000000          <1> 	call	reload_current_directory 
   669 0000A80E 735B                <1> 	jnc	short loc_locatefile_search_again 
   670 0000A810 C3                  <1> 	retn  
   671                              <1> 
   672                              <1> loc_cdir_locatefile_search:
   673 0000A811 31DB                <1> 	xor	ebx, ebx
   674 0000A813 55                  <1> 	push	ebp ; 20/11/2017
   675 0000A814 E8A0000000          <1> 	call	find_directory_entry
   676 0000A819 5D                  <1> 	pop	ebp ; 20/11/2017
   677 0000A81A 7347                <1> 	jnc	short loc_cdir_locate_file_retn
   678                              <1> 
   679                              <1> loc_locatefile_check_stc_reason:
   680 0000A81C 08ED                <1> 	or	ch, ch
   681 0000A81E 7442                <1> 	jz	short loc_cdir_locate_file_stc_retn
   682                              <1> 
   683                              <1> loc_locatefile_check_next_entryblock:
   684                              <1> 	;mov	bh, [Current_Drv]
   685                              <1> 	;sub	bl, bl
   686                              <1> 	;movzx	esi, bx
   687                              <1> 	; 28/07/2022
   688 0000A820 31DB                <1>         xor	ebx, ebx
   689 0000A822 8A3D[0A780100]      <1> 	mov	bh, [Current_Drv]
   690 0000A828 89DE                <1> 	mov	esi, ebx
   691 0000A82A 81C600010900        <1> 	add     esi, Logical_DOSDisks
   692                              <1> 
   693 0000A830 803D[08780100]00    <1> 	cmp	byte [Current_Dir_Level], 0
   694 0000A837 760A                <1> 	jna	short loc_locatefile_check_FAT_type
   695                              <1>             
   696 0000A839 803D[09780100]01    <1> 	cmp	byte [Current_FATType], 1
   697 0000A840 730A                <1> 	jnb	short loc_locatefile_load_subdir_cluster
   698 0000A842 C3                  <1> 	retn  
   699                              <1> 
   700                              <1> loc_locatefile_check_FAT_type:
   701 0000A843 803D[09780100]03    <1> 	cmp	byte [Current_FATType], 3
   702 0000A84A 7217                <1> 	jb	short loc_cdir_locate_file_retn
   703                              <1> 
   704                              <1> loc_locatefile_load_subdir_cluster:
   705 0000A84C A1[367F0100]        <1> 	mov	eax, [DirBuff_Cluster]
   706 0000A851 E8B1190000          <1> 	call	get_next_cluster
   707 0000A856 730C                <1> 	jnc	short loc_locatefile_next_cluster
   708 0000A858 09C0                <1> 	or	eax, eax
   709 0000A85A 7506                <1> 	jnz	short loc_locatefile_drive_not_ready_read_err
   710                              <1> 	;stc
   711                              <1> 	; 28/07/2022
   712                              <1> ;loc_locatefile_file_notfound:
   713                              <1> 	;mov	eax, 2 ; File/Directory/VolName not found
   714 0000A85C 31C0                <1> 	xor	eax, eax
   715 0000A85E B002                <1> 	mov	al, 2
   716 0000A860 F9                  <1> 	stc
   717 0000A861 C3                  <1> 	retn
   718                              <1> 
   719                              <1> loc_locatefile_drive_not_ready_read_err:
   720                              <1> 	;mov	eax, 17 ;Drive not ready or read error
   721                              <1> loc_cdir_locate_file_stc_retn:
   722 0000A862 F5                  <1> 	cmc ;stc
   723                              <1> loc_cdir_locate_file_retn:
   724 0000A863 C3                  <1> 	retn
   725                              <1> 
   726                              <1> loc_locatefile_next_cluster:
   727 0000A864 E85A1B0000          <1> 	call	load_FAT_sub_directory
   728                              <1> 	;jc	short loc_locatefile_drive_not_ready_read_err
   729 0000A869 72F8                <1> 	jc	short loc_cdir_locate_file_retn 
   730                              <1> 
   731                              <1> loc_locatefile_search_again:
   732 0000A86B 8B35[F07F0100]      <1> 	mov	esi, [CDLF_FNAddress] 
   733 0000A871 66A1[EE7F0100]      <1> 	mov	ax, [CDLF_AttributesMask]
   734 0000A877 668B0D[F47F0100]    <1> 	mov	cx, [CDLF_DEType] 
   735 0000A87E EB91                <1> 	jmp	short loc_cdir_locatefile_search
   736                              <1> 
   737                              <1> reload_current_directory:
   738                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
   739                              <1> 	; 06/02/2016 (TRDOS 386 = TRDOS v2.0)
   740                              <1> 	; 13/06/2010
   741                              <1> 	; 22/09/2009
   742                              <1>         ;
   743                              <1> 	; INPUT ->
   744                              <1> 	;	ESI = Dos drive description table address
   745                              <1> 	
   746                              <1> 	;mov	al, [esi+LD_FATType]
   747 0000A880 A0[09780100]        <1> 	mov	al, [Current_FATType]
   748 0000A885 3C02                <1> 	cmp	al, 2
   749 0000A887 7726                <1> 	ja	short loc_reload_FAT_sub_directory
   750 0000A889 8A25[08780100]      <1> 	mov	ah, [Current_Dir_Level]
   751 0000A88F 08C0                <1> 	or	al, al
   752 0000A891 7409                <1> 	jz	short loc_reload_FS_directory
   753 0000A893 08E4                <1> 	or	ah, ah
   754 0000A895 7518                <1> 	jnz	short loc_reload_FAT_sub_directory
   755                              <1> loc_reload_FAT_12_16_root_directory:
   756                              <1> 	;call	load_FAT_root_directory
   757                              <1> 	;retn
   758                              <1> 	; 28/07/2022
   759 0000A897 E9A91A0000          <1> 	jmp	load_FAT_root_directory
   760                              <1> loc_reload_FS_directory:
   761 0000A89C 20E4                <1> 	and	ah, ah
   762 0000A89E 7505                <1> 	jnz	short loc_reload_FS_sub_directory 
   763                              <1> loc_reload_FS_root_directory: 
   764                              <1> 	;call	load_FS_root_directory
   765                              <1> 	;retn
   766                              <1> 	; 28/07/2022
   767 0000A8A0 E9581B0000          <1> 	jmp	load_FS_root_directory
   768                              <1> loc_reload_FS_sub_directory:
   769 0000A8A5 A1[04780100]        <1> 	mov	eax, [Current_Dir_FCluster]
   770                              <1> 	;call	load_FS_sub_directory
   771                              <1> 	;retn
   772 0000A8AA E94E1B0000          <1> 	jmp	load_FS_sub_directory 
   773                              <1> loc_reload_FAT_sub_directory:
   774 0000A8AF A1[04780100]        <1> 	mov	eax, [Current_Dir_FCluster]
   775                              <1> 	;call	load_FAT_sub_directory
   776                              <1> 	;retn
   777                              <1> 	; 28/07/2022
   778 0000A8B4 E90A1B0000          <1> 	jmp	load_FAT_sub_directory
   779                              <1> 
   780                              <1> find_directory_entry:
   781                              <1> 	; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
   782                              <1> 	; 02/03/2021 (TRDOS 386 v2.0.3) ((BugFix))
   783                              <1> 	; 14/02/2016
   784                              <1> 	; 13/02/2016
   785                              <1> 	; 10/02/2016
   786                              <1> 	; 06/02/2016 (TRDOS 386 = TRDOS v2.0)
   787                              <1> 	; 14/08/2010 (DIR.ASM, "proc_find_direntry")
   788                              <1> 	; 19/09/2009
   789                              <1> 	; 2005
   790                              <1> 	; INPUT ->
   791                              <1> 	;	ESI = Sub Dir or File Name Address
   792                              <1> 	;	AL = Attributes Mask 
   793                              <1> 	;	(<AL AND EntryAttrib> must be equal to AL)
   794                              <1> 	;	AH = Negative Attributes Mask (If AH>0)
   795                              <1> 	;	(<AH AND EntryAttrib> must be ZERO)
   796                              <1> 	;	CH > 0 Find First Free Dir Entry or Deleted Entry
   797                              <1> 	;	CL = 0 -> Return the First Free Dir Entry
   798                              <1> 	;	CL = E5h -> Return the 1st deleted entry
   799                              <1> 	;	CL = FFh -> Return the 1st deleted or free entry
   800                              <1> 	;	CL > 0 and CL <> E5h and CL <> FFh -> Return the first 
   801                              <1> 	;            proper entry (which fits with Atributes Masks)
   802                              <1> 	;	CX = 0 -> Find Valid File/Directory/VolumeName
   803                              <1> 	;	? = Any One Char
   804                              <1> 	;	* = Every Chars
   805                              <1> 	;	EBX = Current Dir Entry (BX)
   806                              <1> 	;
   807                              <1> 	; OUTPUT -> 
   808                              <1> 	;	EDI = Directory Entry Address (in DirectoryBuffer)
   809                              <1> 	;	ESI = Sub Dir or File Name Address
   810                              <1> 	;	CF = 0 -> No Error, Proper Entry,
   811                              <1> 	;	DL = Attributes
   812                              <1> 	;	DH = Previous Entry Attr (LongName Check)
   813                              <1> 	;	AL > 0 -> Ambiguous filename wildcard "?" used
   814                              <1> 	;	AH > 0 -> Ambiguous filename wildcard "*" used
   815                              <1> 	;	AX = 0 -> Filename full fits with directory entry
   816                              <1> 	;	EBX = CurrentDirEntry (BX)
   817                              <1> 	;	CH = The 1st Name Char of Current Dir Entry
   818                              <1> 	;	CF = 1 -> Proper entry not found, Error Code in AX/AL
   819                              <1> 	;	CL = 0 and CH = 0 -> Free Entry (End Of Dir)
   820                              <1> 	;	CL = 0 and CH = E5h -> Deleted Entry fits with filters
   821                              <1> 	;	CL > 0 -> Entry not found, CH invalid
   822                              <1> 	;
   823                              <1> 	; (EAX, EBX, ECX, EDX, EDI, EBP will be changed)	 
   824                              <1> 
   825 0000A8B9 663B1D[347F0100]    <1> 	cmp	bx, [DirBuff_LastEntry]
   826 0000A8C0 7728                <1> 	ja      short loc_ffde_stc_retn_255 ; 28/07/2022
   827                              <1> 
   828                              <1> 	;mov    [DirBuff_CurrentEntry], bx  
   829                              <1> 
   830 0000A8C2 BF00000800          <1>   	mov	edi, Directory_Buffer
   831 0000A8C7 66A3[00800100]      <1> 	mov	[FDE_AttrMask], ax
   832                              <1> 
   833 0000A8CD 29C0                <1> 	sub	eax, eax
   834                              <1>             
   835                              <1> 	;;mov	[PreviousAttr], al ; 0 ;; 13/02/2016
   836 0000A8CF 66A3[02800100]      <1> 	mov	[AmbiguousFileName], ax ; 0
   837                              <1> 
   838 0000A8D5 6689D8              <1> 	mov	ax, bx
   839                              <1> 	;shl	ax, 5 ; ; * 32 ; Directory entry size
   840                              <1> 	; 28/07/2022
   841 0000A8D8 C1E005              <1> 	shl	eax, 5
   842 0000A8DB 01C7                <1> 	add     edi, eax
   843                              <1> 
   844 0000A8DD 08ED                <1> 	or	ch, ch
   845                              <1> 	;jnz	loc_find_free_deleted_entry_0
   846                              <1> 	; 28/07/2022
   847 0000A8DF 7405                <1> 	jz	short loc_fde_any_valid_entry_opt
   848 0000A8E1 E911010000          <1> 	jmp	loc_find_free_deleted_entry_0
   849                              <1> 
   850                              <1> loc_fde_any_valid_entry_opt:
   851 0000A8E6 08C9                <1> 	or      cl, cl
   852                              <1>         ;jnz	loc_ffde_stc_retn_255
   853                              <1> 	; 28/07/2022
   854 0000A8E8 742E                <1> 	jz	short check_find_dir_entry
   855                              <1> 
   856                              <1> 	; 28/07/2022
   857                              <1> loc_ffde_stc_retn_255:
   858                              <1> 	; 02/03/2021 (TRDOS 386 v2.0.3) ((BugFix))
   859                              <1> 	; (ECX must not be > 65535)
   860                              <1> 	; ((because 'loc_ccd_save_current_dir'
   861                              <1> 	;  sets CX to 32 for 'rep movsd')) 
   862 0000A8EA 66B9FFFF            <1> 	mov	cx, 0FFFFh
   863                              <1> 	;xor	ecx, ecx
   864                              <1> 	;dec	ecx ; 0FFFFFFFFh
   865                              <1> 	;xor	eax, eax
   866                              <1> loc_find_direntry_stc_retn:
   867                              <1> loc_check_ffde_retn_1:
   868                              <1> 	;mov	ax, 2
   869                              <1> 	;mov	eax, 2 ; File Not Found
   870                              <1> 	; 28/07/2022
   871 0000A8EE 29C0                <1> 	sub	eax, eax
   872 0000A8F0 B002                <1> 	mov	al, 2
   873 0000A8F2 8A35[04800100]      <1> 	mov	dh, [PreviousAttr]
   874 0000A8F8 66891D[327F0100]    <1> 	mov	[DirBuff_CurrentEntry], bx
   875 0000A8FF F9                  <1> 	stc
   876 0000A900 C3                  <1> 	retn
   877                              <1> 
   878                              <1> 	; 28/07/2022
   879                              <1> loc_find_dir_next_entry_prevdeleted:
   880 0000A901 80CA80              <1> 	or	dl, 80h  ; Bit 7 -> deleted entry sign
   881                              <1> 	;jmp	short loc_find_dir_next_entry
   882                              <1> 
   883                              <1> 	; 28/07/2022
   884                              <1> loc_find_dir_next_entry:
   885 0000A904 8815[04800100]      <1> 	mov	byte [PreviousAttr], dl ; LongName check
   886                              <1> loc_find_dir_next_entry_1:
   887 0000A90A 5E                  <1> 	pop	esi
   888 0000A90B 83C720              <1> 	add	edi, 32
   889                              <1> 	;;inc	word [DirBuff_EntryCounter]
   890                              <1> 	;inc	bx
   891                              <1> 	; 28/07/2022
   892 0000A90E 43                  <1> 	inc	ebx
   893 0000A90F 663B1D[347F0100]    <1> 	cmp	bx, [DirBuff_LastEntry]
   894 0000A916 77D2                <1> 	ja	short loc_ffde_stc_retn_255
   895                              <1>         ; 28/07/2022
   896                              <1> 	;jmp	short check_find_dir_entry 
   897                              <1>  
   898                              <1> check_find_dir_entry:
   899 0000A918 66A1[00800100]      <1> 	mov	ax, [FDE_AttrMask]
   900 0000A91E 8A2F                <1> 	mov	ch, [edi]
   901 0000A920 80FD00              <1> 	cmp     ch, 0 ; Is it never used entry?
   902                              <1> 	;jna	loc_find_direntry_stc_retn
   903                              <1> 	; 28/07/2022
   904 0000A923 7702                <1> 	ja	short loc_fde_check_attrib
   905                              <1> 	; end of directory entries
   906 0000A925 EBC7                <1> 	jmp	loc_find_direntry_stc_retn
   907                              <1> loc_fde_check_attrib: 
   908 0000A927 56                  <1> 	push	esi
   909 0000A928 8A570B              <1> 	mov	dl, [edi+0Bh] ; File attributes
   910 0000A92B 80FDE5              <1> 	cmp	ch, 0E5h ; Is it a deleted file?
   911 0000A92E 74D1                <1> 	je	short loc_find_dir_next_entry_prevdeleted
   912                              <1> 
   913 0000A930 80FA0F              <1> 	cmp     dl, 0Fh ; longname sub component check
   914 0000A933 7505                <1> 	jne     short loc_check_attributes_mask
   915 0000A935 E8A6010000          <1> 	call	save_longname_sub_component
   916                              <1> 
   917                              <1> loc_check_attributes_mask:
   918 0000A93A 88C6                <1> 	mov	dh, al
   919 0000A93C 20D6                <1> 	and	dh, dl 
   920                              <1> 	; 28/07/2022   
   921 0000A93E 38F0                <1> 	cmp	al, dh
   922 0000A940 75C2                <1> 	jne	short loc_find_dir_next_entry
   923 0000A942 20D4                <1> 	and	ah, dl
   924 0000A944 75BE                <1>         jnz	short loc_find_dir_next_entry
   925 0000A946 80FA0F              <1> 	cmp	dl, 0Fh
   926 0000A949 7515                <1> 	jne	short pass_direntry_attr_check
   927                              <1> 
   928 0000A94B 3C0F                <1> 	cmp	al, 0Fh ; AL = 0Fh -> find long name
   929 0000A94D 75B5                <1> 	jne	short loc_find_dir_next_entry
   930                              <1> 
   931 0000A94F 5E                  <1> 	pop	esi
   932                              <1> 	;xor	ax, ax
   933                              <1> 	; 28/07/2022
   934                              <1> 	;sub	eax, eax
   935 0000A950 30C0                <1> 	xor	al, al
   936 0000A952 8A35[04800100]      <1> 	mov	dh, [PreviousAttr]
   937 0000A958 66891D[327F0100]    <1> 	mov	[DirBuff_CurrentEntry], bx
   938 0000A95F C3                  <1> 	retn
   939                              <1> 
   940                              <1> pass_direntry_attr_check:
   941 0000A960 89FD                <1> 	mov	ebp, edi ; 14/02/2016
   942                              <1> 	;mov	ecx, 8
   943                              <1> 	; 28/07/2022
   944 0000A962 29C9                <1> 	sub	ecx, ecx
   945 0000A964 B108                <1> 	mov	cl, 8
   946                              <1> loc_lodsb_find_dir:
   947 0000A966 AC                  <1> 	lodsb
   948 0000A967 3C2A                <1> 	cmp	al, '*'
   949 0000A969 7508                <1> 	jne	short pass_fde_ambiguous1_check
   950 0000A96B FE05[03800100]      <1>         inc     byte [AmbiguousFileName+1]
   951 0000A971 EB23                <1> 	jmp	short loc_check_direntry_extension
   952                              <1> 
   953                              <1> pass_fde_ambiguous1_check:
   954 0000A973 3C3F                <1> 	cmp	al, '?'
   955 0000A975 750D                <1> 	jne	short pass_fde_ambiguous2_check
   956 0000A977 FE05[02800100]      <1> 	inc	byte [AmbiguousFileName]
   957 0000A97D 803F20              <1> 	cmp	byte [edi], 20h
   958 0000A980 763E                <1> 	jna	short loc_find_dir_next_entry_ebp
   959 0000A982 EB0F                <1> 	jmp	short loc_scasb_find_dir_inc_di
   960                              <1> 
   961                              <1> pass_fde_ambiguous2_check:
   962 0000A984 3C20                <1> 	cmp	al, 20h
   963 0000A986 7507                <1> 	jne	short loc_scasb_find_dir
   964 0000A988 803F20              <1> 	cmp	byte [edi], 20h
   965 0000A98B 7533                <1> 	jne	short loc_find_dir_next_entry_ebp
   966 0000A98D EB07                <1> 	jmp	short loc_check_direntry_extension
   967                              <1> 
   968                              <1> loc_scasb_find_dir:
   969 0000A98F 3A07                <1> 	cmp	al, [edi]
   970 0000A991 752D                <1> 	jne	short loc_find_dir_next_entry_ebp
   971                              <1> loc_scasb_find_dir_inc_di:
   972 0000A993 47                  <1> 	inc	edi
   973 0000A994 E2D0                <1> 	loop	loc_lodsb_find_dir
   974                              <1> 
   975                              <1> loc_check_direntry_extension:
   976 0000A996 BE08000000          <1> 	mov	esi, 8
   977 0000A99B 89F7                <1> 	mov	edi, esi ; 8
   978 0000A99D 033424              <1> 	add	esi, [esp] ; Sub Dir or File Name Address
   979 0000A9A0 01EF                <1> 	add	edi, ebp
   980 0000A9A2 B103                <1> 	mov	cl, 3
   981                              <1> loc_lodsb_find_dir_ext:
   982 0000A9A4 AC                  <1> 	lodsb
   983 0000A9A5 3C2A                <1> 	cmp	al, '*'
   984 0000A9A7 7508                <1> 	jne	short pass_fde_ambiguous3_check
   985 0000A9A9 FE05[03800100]      <1> 	inc	byte [AmbiguousFileName+1]
   986 0000A9AF EB1F                <1> 	jmp	short loc_find_dir_proper_direntry
   987                              <1> 
   988                              <1> pass_fde_ambiguous3_check:
   989 0000A9B1 3C3F                <1> 	cmp	al, '?'
   990 0000A9B3 7512                <1> 	jne	short pass_fde_ambiguous4_check
   991 0000A9B5 FE05[02800100]      <1> 	inc	byte [AmbiguousFileName]
   992 0000A9BB 803F20              <1> 	cmp	byte [edi], 20h
   993                              <1> 	;jna	short loc_find_dir_next_entry_ebp
   994                              <1> 	;jmp	short loc_scasb_find_dir_ext_inc_di
   995                              <1> 	; 28/07/2022
   996 0000A9BE 7732                <1> 	ja	short loc_scasb_find_dir_ext_inc_di 
   997                              <1> 
   998                              <1> loc_find_dir_next_entry_ebp:
   999 0000A9C0 89EF                <1> 	mov	edi, ebp ; 14/02/2016
  1000 0000A9C2 E93DFFFFFF          <1> 	jmp	loc_find_dir_next_entry ; 28/07/2022
  1001                              <1> 
  1002                              <1> pass_fde_ambiguous4_check:
  1003 0000A9C7 3C20                <1> 	cmp	al, 20h
  1004 0000A9C9 7523                <1> 	jne	short loc_scasb_find_dir_ext
  1005 0000A9CB 803F20              <1> 	cmp	byte [edi], 20h
  1006                              <1> 	; 28/07/2022
  1007 0000A9CE 75F0                <1> 	jne	short loc_find_dir_next_entry_ebp
  1008                              <1> 	;jmp	short loc_find_dir_proper_direntry
  1009                              <1> 
  1010                              <1> loc_find_dir_proper_direntry:
  1011 0000A9D0 30C9                <1> 	xor	cl, cl
  1012                              <1> loc_find_dir_proper_direntry_1:
  1013 0000A9D2 5E                  <1> 	pop	esi
  1014 0000A9D3 89EF                <1>         mov     edi, ebp
  1015 0000A9D5 8A2F                <1> 	mov	ch, [edi]
  1016 0000A9D7 8A570B              <1> 	mov     dl, [edi+0Bh] ; Dir entry attributes
  1017 0000A9DA 66A1[02800100]      <1> 	mov	ax, [AmbiguousFileName]
  1018                              <1> loc_find_dir_proper_direntry_2:
  1019 0000A9E0 8A35[04800100]      <1> 	mov     dh, [PreviousAttr]
  1020 0000A9E6 66891D[327F0100]    <1> 	mov	[DirBuff_CurrentEntry], bx
  1021 0000A9ED C3                  <1> 	retn
  1022                              <1> 
  1023                              <1> loc_scasb_find_dir_ext:
  1024 0000A9EE 3A07                <1> 	cmp	al, [edi]
  1025 0000A9F0 75CE                <1> 	jne	short loc_find_dir_next_entry_ebp
  1026                              <1> loc_scasb_find_dir_ext_inc_di:
  1027 0000A9F2 47                  <1> 	inc	edi
  1028 0000A9F3 E2AF                <1> 	loop    loc_lodsb_find_dir_ext
  1029 0000A9F5 EBDB                <1> 	jmp	short loc_find_dir_proper_direntry_1
  1030                              <1> 
  1031                              <1> loc_find_free_deleted_entry_0:
  1032 0000A9F7 66A1[00800100]      <1> 	mov	ax, [FDE_AttrMask]
  1033 0000A9FD 8A2F                <1> 	mov	ch, [edi]
  1034 0000A9FF 8A570B              <1> 	mov	dl, [edi+0Bh] ; File attributes
  1035 0000AA02 08C9                <1> 	or	cl, cl 
  1036 0000AA04 7407                <1> 	jz	short loc_check_ffde_0_repeat
  1037                              <1> 	;cmp	cl, 0E5h
  1038                              <1> 	;je	short pass_loc_check_ffde_0_err
  1039 0000AA06 80F9FF              <1> 	cmp	cl, 0FFh
  1040 0000AA09 7430                <1> 	je	short loc_find_free_deleted_entry_1
  1041 0000AA0B EB4A                <1> 	jmp	short pass_loc_check_ffde_0_err
  1042                              <1> 
  1043                              <1> loc_check_ffde_0_repeat:
  1044 0000AA0D 08ED                <1> 	or	ch, ch
  1045 0000AA0F 7510                <1> 	jnz	short loc_check_ffde_0_next
  1046                              <1> 
  1047                              <1> loc_check_ffde_retn_2:
  1048                              <1> 	;sub	ax, ax
  1049                              <1> 	; 28/07/2022
  1050 0000AA11 29C0                <1> 	sub	eax, eax
  1051 0000AA13 8A35[04800100]      <1> 	mov	dh, [PreviousAttr]
  1052 0000AA19 66891D[327F0100]    <1> 	mov	[DirBuff_CurrentEntry], bx
  1053 0000AA20 C3                  <1> 	retn
  1054                              <1>  
  1055                              <1> loc_check_ffde_0_next:
  1056                              <1> 	;inc	bx
  1057                              <1> 	; 28/07/2022
  1058 0000AA21 43                  <1> 	inc	ebx
  1059 0000AA22 83C720              <1> 	add	edi, 32
  1060                              <1> 	;inc	word [DirBuff_EntryCounter]
  1061                              <1> 	 
  1062 0000AA25 663B1D[347F0100]    <1>         cmp	bx, [DirBuff_LastEntry]
  1063                              <1> 	;ja	short loc_ffde_stc_retn_255
  1064                              <1> 	; 07/08/2022
  1065 0000AA2C 773A                <1> 	ja	short jmp_ffde_stc_retn_255
  1066                              <1> 
  1067 0000AA2E 8815[04800100]      <1> 	mov	[PreviousAttr], dl
  1068 0000AA34 8A2F                <1> 	mov	ch, [edi]
  1069 0000AA36 8A570B              <1> 	mov	dl, [edi+0Bh] ; file attributes
  1070 0000AA39 EBD2                <1> 	jmp	short loc_check_ffde_0_repeat
  1071                              <1> 
  1072                              <1> loc_find_free_deleted_entry_1:
  1073 0000AA3B 28D2                <1> 	sub	dl, dl      
  1074                              <1> loc_find_free_deleted_entry_2:
  1075 0000AA3D 20ED                <1> 	and	ch, ch  
  1076 0000AA3F 74D0                <1> 	jz	short loc_check_ffde_retn_2
  1077 0000AA41 80FDE5              <1> 	cmp	ch, 0E5h
  1078 0000AA44 74CB                <1> 	je	short loc_check_ffde_retn_2
  1079                              <1> 	;inc	bx
  1080                              <1> 	; 28/07/2022
  1081 0000AA46 43                  <1> 	inc	ebx
  1082 0000AA47 83C720              <1> 	add	edi, 32
  1083 0000AA4A 663B1D[347F0100]    <1> 	cmp	bx, [DirBuff_LastEntry]
  1084                              <1> 	;ja	short loc_ffde_stc_retn_255
  1085                              <1> 	; 07/08/2022
  1086 0000AA51 7715                <1> 	ja	short jmp_ffde_stc_retn_255
  1087                              <1> 
  1088 0000AA53 8A2F                <1> 	mov	ch, [edi]
  1089 0000AA55 EBE6                <1> 	jmp	short loc_find_free_deleted_entry_2
  1090                              <1> 
  1091                              <1> pass_loc_check_ffde_0_err:
  1092 0000AA57 38CD                <1> 	cmp	ch, cl
  1093 0000AA59 741F                <1> 	je	short loc_check_ffde_attrib 
  1094                              <1> 
  1095                              <1> 	;inc	bx
  1096                              <1> 	; 28/07/2022
  1097 0000AA5B 43                  <1> 	inc	ebx
  1098 0000AA5C 83C720              <1> 	add	edi, 32
  1099 0000AA5F 663B1D[347F0100]    <1> 	cmp	bx, [DirBuff_LastEntry]
  1100                              <1>         ;ja	loc_ffde_stc_retn_255
  1101                              <1> 	; 28/07/2022
  1102 0000AA66 7605                <1> 	jna	short loc_ffe_save_prev_attr
  1103                              <1> jmp_ffde_stc_retn_255:	; 07/08/2022
  1104 0000AA68 E97DFEFFFF          <1> 	jmp	loc_ffde_stc_retn_255
  1105                              <1> 
  1106                              <1> loc_ffe_save_prev_attr: ; 28/07/2022
  1107 0000AA6D 8815[04800100]      <1> 	mov	[PreviousAttr], dl
  1108 0000AA73 8A2F                <1> 	mov	ch, [edi]
  1109 0000AA75 8A570B              <1> 	mov	dl, [edi+0Bh]
  1110 0000AA78 EBDD                <1> 	jmp	short pass_loc_check_ffde_0_err
  1111                              <1> 
  1112                              <1> loc_check_ffde_attrib:
  1113 0000AA7A 88C6                <1> 	mov	dh, al
  1114 0000AA7C 20D6                <1> 	and	dh, dl    
  1115 0000AA7E 38F0                <1> 	cmp	al, dh
  1116 0000AA80 759F                <1> 	jne	short loc_check_ffde_0_next
  1117 0000AA82 20D4                <1> 	and	ah, dl
  1118 0000AA84 759B                <1> 	jnz	short loc_check_ffde_0_next
  1119 0000AA86 30C9                <1> 	xor	cl, cl 
  1120 0000AA88 EB87                <1>         jmp	short loc_check_ffde_retn_2
  1121                              <1> 
  1122                              <1> convert_file_name:
  1123                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  1124                              <1> 	; 06/03/2016
  1125                              <1> 	; 11/02/2016
  1126                              <1> 	; 07/02/2016 (TRDOS 386 = TRDOS v2.0)
  1127                              <1> 	; 06/10/2009
  1128                              <1> 	; 2005
  1129                              <1> 	;
  1130                              <1> 	; INPUT  ->
  1131                              <1> 	;	ESI = Dot File Name Location
  1132                              <1> 	;	EDI = Dir Entry Format File Name Location
  1133                              <1> 	; OUTPUT ->
  1134                              <1> 	;	EDI = Dir Entry Format File Name Location
  1135                              <1> 	;	ESI = Dot File Name Location (capitalized)
  1136                              <1> 	;
  1137                              <1> 	; (ECX, AL will be changed) 
  1138                              <1>      
  1139 0000AA8A 56                  <1> 	push	esi  
  1140 0000AA8B 57                  <1> 	push	edi
  1141                              <1> 
  1142                              <1> 	;mov	ecx, 11
  1143                              <1> 	; 29/07 2022
  1144 0000AA8C 29C9                <1> 	sub	ecx, ecx
  1145 0000AA8E B10B                <1> 	mov	cl, 11
  1146 0000AA90 B020                <1> 	mov	al, 20h
  1147 0000AA92 F3AA                <1> 	rep	stosb
  1148                              <1> 
  1149 0000AA94 8B3C24              <1> 	mov	edi, [esp]
  1150                              <1> 
  1151 0000AA97 B10C                <1> 	mov	cl, 12 ; file name length (max.)
  1152                              <1> 	; 06/03/2016
  1153                              <1> 	; Directory entry name limit (11 bytes) check for
  1154                              <1> 	; 'rename_directory_entry' procedure.
  1155                              <1> 	; (EDI points to Directory Entry)
  1156                              <1> 	; (If the file name would not contain a dot
  1157                              <1> 	; and file name length would be 12, this would cause to
  1158                              <1> 	; overwrite the attributes byte of the directory entry.)
  1159                              <1> 	;
  1160 0000AA99 B50B                <1> 	mov	ch, 11 ; directory entry's name length
  1161                              <1> loc_check_first_dot:
  1162 0000AA9B 8A06                <1> 	mov	al, [esi]
  1163 0000AA9D 3C2E                <1> 	cmp	al, 2Eh
  1164 0000AA9F 750C                <1> 	jne	short pass_check_first_dot
  1165 0000AAA1 8807                <1> 	mov	[edi], al
  1166 0000AAA3 47                  <1> 	inc	edi
  1167 0000AAA4 46                  <1> 	inc	esi
  1168 0000AAA5 FEC9                <1> 	dec	cl
  1169 0000AAA7 75F2                <1> 	jnz	short loc_check_first_dot
  1170                              <1> 	;;(ecx <= 12)
  1171                              <1> 	;;loop	loc_check_first_dot 
  1172 0000AAA9 EB30                <1> 	jmp	short stop_convert_file
  1173                              <1> 
  1174                              <1> loc_get_fchar:
  1175 0000AAAB 8A06                <1> 	mov	al, [esi]
  1176                              <1> pass_check_first_dot:
  1177 0000AAAD 3C61                <1> 	cmp	al, 61h ; 'a'
  1178 0000AAAF 7208                <1> 	jb	short pass_name_capitalize
  1179 0000AAB1 3C7A                <1> 	cmp	al, 7Ah ; 'z'
  1180 0000AAB3 7704                <1> 	ja	short pass_name_capitalize
  1181 0000AAB5 24DF                <1> 	and	al, 0DFh
  1182 0000AAB7 8806                <1> 	mov	[esi], al
  1183                              <1> pass_name_capitalize:
  1184 0000AAB9 3C21                <1> 	cmp	al, 21h
  1185 0000AABB 721E                <1> 	jb	short stop_convert_file
  1186 0000AABD 3C2E                <1> 	cmp	al, 2Eh ; '.'
  1187 0000AABF 750C                <1> 	jne	short pass_dot_space
  1188                              <1> add_dot_space: 
  1189 0000AAC1 80F904              <1> 	cmp	cl, 4
  1190 0000AAC4 760E                <1> 	jna	short inc_and_loop
  1191 0000AAC6 47                  <1> 	inc	edi
  1192 0000AAC7 FECD                <1> 	dec	ch ; 06/03/2016
  1193 0000AAC9 FEC9                <1> 	dec	cl
  1194 0000AACB EBF4                <1> 	jmp	short add_dot_space
  1195                              <1> 	
  1196                              <1> 	;mov	al, 4
  1197                              <1> 	;cmp	cl, al
  1198                              <1> 	;jna	short inc_and_loop
  1199                              <1> 	;sub	cl, al
  1200                              <1> 	;add	edi, ecx
  1201                              <1> 	;mov	cl, al
  1202                              <1> 	;jmp	short inc_and_loop	
  1203                              <1> 
  1204                              <1> pass_dot_space:
  1205 0000AACD 8807                <1> 	mov	[edi], al
  1206                              <1> loc_after_double_dot:
  1207                              <1> 	; 06/03/2016
  1208 0000AACF FECD                <1> 	dec	ch ; count down for 11 bytes dir entry limit
  1209 0000AAD1 740A                <1> 	jz	short stop_convert_file_x
  1210 0000AAD3 47                  <1> 	inc	edi
  1211                              <1> inc_and_loop:
  1212 0000AAD4 FEC9                <1> 	dec	cl ; count down for 12 bytes filename limit 
  1213 0000AAD6 7403                <1> 	jz	short stop_convert_file	
  1214 0000AAD8 46                  <1> 	inc	esi
  1215                              <1> 	;;(ecx <= 12)
  1216                              <1> 	;;loop	loc_get_fchar
  1217 0000AAD9 EBD0                <1> 	jmp	short loc_get_fchar
  1218                              <1> 
  1219                              <1> stop_convert_file:
  1220                              <1> 	; 06/03/2016
  1221 0000AADB 30ED                <1> 	xor	ch, ch
  1222                              <1> 	; ECX < 256 ; 'find_first_file' -> xor cl, cl
  1223                              <1> stop_convert_file_x:
  1224 0000AADD 5F                  <1> 	pop	edi
  1225 0000AADE 5E                  <1> 	pop	esi
  1226 0000AADF C3                  <1> 	retn
  1227                              <1>  
  1228                              <1> save_longname_sub_component:
  1229                              <1> 	; 13/02/2016
  1230                              <1> 	; 06/02/2016 (TRDOS 386 = TRDOS v2.0)
  1231                              <1> 	; 28/02/2010
  1232                              <1> 	; 17/10/2009
  1233                              <1> 	; INPUT ->
  1234                              <1> 	;	EDI = Directory Entry    
  1235                              <1> 	;     	// This procedure is called
  1236                              <1> 	;	// from 'find_directory_entry' procedure.
  1237                              <1> 	;	// If the last entry returns with
  1238                              <1> 	;	// a non-zero LongnameFound value and
  1239                              <1> 	;	// if LFN_CheckSum value is equal to
  1240                              <1> 	;	// the next shortname checksum,
  1241                              <1> 	;	// long name is valid.
  1242                              <1> 	;	// If a longname is longer than 65 bytes,
  1243                              <1> 	;	// it is invalid for trdos. (>45h)
  1244                              <1>  
  1245 0000AAE0 57                  <1> 	push	edi
  1246 0000AAE1 56                  <1> 	push	esi
  1247                              <1> 	;push	ebx
  1248                              <1> 	;push	ecx
  1249                              <1> 	;push	edx
  1250 0000AAE2 50                  <1> 	push	eax
  1251                              <1>            
  1252 0000AAE3 29C9                <1> 	sub	ecx, ecx
  1253                              <1> 	;sub	eax, eax
  1254 0000AAE5 B11A                <1> 	mov	cl, 26
  1255                              <1> 
  1256 0000AAE7 0FB607              <1> 	movzx	eax, byte [edi] ; LDIR_Order
  1257 0000AAEA 3C41                <1> 	cmp	al, 41h  ; 40h (last long entry sign) + 1
  1258 0000AAEC 722B                <1> 	jb	short pass_pslnsc_last_long_entry
  1259                              <1> 
  1260 0000AAEE 88C4                <1> 	mov	ah, al
  1261 0000AAF0 80EC40              <1> 	sub	ah, 40h
  1262 0000AAF3 8825[06800100]      <1> 	mov	[LFN_EntryLength], ah
  1263                              <1> 	
  1264 0000AAF9 3C45                <1> 	cmp	al, 45h  ; 40h (last long entry sign) + 5
  1265                              <1>  		; Max 130 byte length is usable in TRDOS
  1266                              <1> ; 26*5 = 130
  1267 0000AAFB 7753                <1> 	ja	short loc_pslnsc_retn
  1268                              <1> 
  1269 0000AAFD 2407                <1> 	and	al, 07h ; 0Fh
  1270 0000AAFF A2[05800100]        <1> 	mov	[LongNameFound], al
  1271                              <1> 
  1272 0000AB04 FEC8                <1> 	dec	al
  1273                              <1> 	;mov	cl, 26
  1274 0000AB06 F6E1                <1> 	mul	cl
  1275                              <1> 
  1276 0000AB08 89C6                <1> 	mov	esi, eax
  1277 0000AB0A 01CE                <1> 	add	esi, ecx
  1278                              <1> 		; to make is an ASCIIZ string
  1279                              <1> 		; with ax+26 bytes length
  1280 0000AB0C 81C6[08800100]      <1> 	add	esi, LongFileName
  1281 0000AB12 66C7060000          <1> 	mov	word [esi], 0   
  1282 0000AB17 EB16                <1> 	jmp	short loc_pslsc_move_ldir_name2 
  1283                              <1> 
  1284                              <1> pass_pslnsc_last_long_entry:
  1285 0000AB19 3C04                <1> 	cmp	al, 04h
  1286 0000AB1B 7733                <1> 	ja	short loc_pslnsc_retn
  1287 0000AB1D FE0D[05800100]      <1> 	dec	byte [LongNameFound]
  1288 0000AB23 3A05[05800100]      <1> 	cmp	al, [LongNameFound]
  1289 0000AB29 7525                <1> 	jne	short loc_pslnsc_retn
  1290                              <1> 
  1291                              <1> loc_pslsc_move_ldir_name1:
  1292 0000AB2B FEC8                <1> 	dec	al
  1293                              <1> 	;mov	cl, 26
  1294 0000AB2D F6E1                <1> 	mul	cl
  1295                              <1> 
  1296                              <1> loc_pslsc_move_ldir_name2:
  1297 0000AB2F 8A4F0D              <1> 	mov	cl, [edi+0Dh] ; long name checksum
  1298 0000AB32 880D[07800100]      <1> 	mov	[LFN_CheckSum], cl 
  1299 0000AB38 89FE                <1> 	mov	esi, edi ; LDIR_Order
  1300 0000AB3A BF[08800100]        <1> 	mov	edi, LongFileName
  1301 0000AB3F 01C7                <1> 	add	edi, eax
  1302 0000AB41 46                  <1> 	inc	esi
  1303 0000AB42 B105                <1> 	mov	cl, 5 ; chars 1 to 5
  1304 0000AB44 F366A5              <1> 	rep	movsw
  1305 0000AB47 83C603              <1> 	add	esi, 3
  1306 0000AB4A A5                  <1> 	movsd	; char 6 & 7 
  1307 0000AB4B A5                  <1> 	movsd	; char 8 & 9
  1308 0000AB4C A5                  <1> 	movsd	; char 10 & 11
  1309 0000AB4D 46                  <1> 	inc	esi
  1310 0000AB4E 46                  <1> 	inc	esi 
  1311 0000AB4F A5                  <1> 	movsd   ; char 12 & 13 
  1312                              <1> 
  1313                              <1> loc_pslnsc_retn:
  1314 0000AB50 58                  <1>  	pop	eax
  1315                              <1> 	;pop	edx
  1316                              <1> 	;pop	ecx
  1317                              <1> 	;pop	ebx
  1318 0000AB51 5E                  <1> 	pop	esi  
  1319 0000AB52 5F                  <1> 	pop	edi
  1320                              <1>  
  1321 0000AB53 C3                  <1>     	retn
  1322                              <1> 
  1323                              <1> parse_path_name:
  1324                              <1> 	; 09/08/2022
  1325                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  1326                              <1> 	; 10/02/2016
  1327                              <1> 	; 08/02/2016 (TRDOS 386 = TRDOS v2.0)
  1328                              <1> 	; 10/009/2011 ('proc_parse_pathname')
  1329                              <1> 	; 27/11/2009
  1330                              <1> 	; 05/12/2004
  1331                              <1> 	;
  1332                              <1> 	; INPUT ->
  1333                              <1> 	;	ESI = Beginning of ASCIIZ pathname string
  1334                              <1> 	;       EDI = Destination Address
  1335                              <1> 	;	      (which is TR-DOS FindFile data buffer)
  1336                              <1> 	; OUTPUT ->
  1337                              <1> 	;	CF = 1 -> Error
  1338                              <1> 	;	     EAX = Error Code (AL)
  1339                              <1> 	;
  1340                              <1> 	; (Modified registers: eax, ecx, esi, edi) 
  1341                              <1> 	
  1342                              <1> 	; Clear the pathname bytes in TR-DOS Findfile data buffer 
  1343 0000AB54 57                  <1> 	push	edi
  1344                              <1> 	;mov	ecx, 20  ; 80 bytes
  1345                              <1> 	; 29/07/2022
  1346 0000AB55 29C9                <1> 	sub	ecx, ecx
  1347 0000AB57 B114                <1> 	mov	cl, 20
  1348 0000AB59 31C0                <1> 	xor	eax, eax
  1349 0000AB5B F3AB                <1> 	rep	stosd 
  1350 0000AB5D 5F                  <1> 	pop	edi
  1351                              <1> 
  1352 0000AB5E 668B06              <1> 	mov	ax, [esi]
  1353 0000AB61 80FC3A              <1> 	cmp	ah, ':'
  1354 0000AB64 741C                <1> 	je	short loc_ppn_change_drive
  1355 0000AB66 A0[0A780100]        <1> 	mov	al, [Current_Drv]
  1356 0000AB6B EB33                <1> 	jmp	short pass_ppn_change_drive
  1357                              <1> 
  1358                              <1> pass_ppn_cdir:
  1359 0000AB6D 8B35[2A810100]      <1> 	mov	esi, [First_Path_Pos]
  1360 0000AB73 AC                  <1> 	lodsb
  1361                              <1> loc_ppn_get_filename:
  1362 0000AB74 83C741              <1> 	add	edi, 65 ; FindFile_Name location
  1363                              <1> 	; TRDOS Filename length must not be more than 12 bytes
  1364                              <1> 	;mov	ecx, 12
  1365 0000AB77 B10C                <1> 	mov	cl, 12
  1366                              <1> loc_ppn_get_fnchar_next:
  1367 0000AB79 AA                  <1> 	stosb
  1368 0000AB7A AC                  <1> 	lodsb
  1369 0000AB7B 3C21                <1> 	cmp	al, 21h
  1370 0000AB7D 726F                <1> 	jb	short loc_ppn_clc_return 
  1371 0000AB7F E2F8                <1>         loop    loc_ppn_get_fnchar_next
  1372                              <1> loc_ppn_return:
  1373 0000AB81 C3                  <1> 	retn
  1374                              <1> 
  1375                              <1> loc_ppn_change_drive:
  1376                              <1> 	; 29/07/2022
  1377                              <1> 	; ecx = 0
  1378 0000AB82 24DF                <1> 	and	al, 0DFh
  1379 0000AB84 2C41                <1> 	sub	al, 'A'; A:
  1380 0000AB86 726A                <1> 	jc	short loc_ppn_invalid_drive
  1381 0000AB88 3805[BE2F0100]      <1> 	cmp	[Last_DOS_DiskNo], al
  1382 0000AB8E 7262                <1> 	jb	short loc_ppn_invalid_drive
  1383                              <1> 
  1384 0000AB90 46                  <1> 	inc	esi
  1385 0000AB91 46                  <1> 	inc	esi
  1386 0000AB92 8A26                <1> 	mov	ah, [esi]
  1387 0000AB94 80FC21              <1> 	cmp	ah, 21h
  1388 0000AB97 7307                <1> 	jnb	short pass_ppn_change_drive
  1389                              <1> 
  1390                              <1> loc_ppn_cmd_failed:
  1391                              <1> 	; File or directory name is not existing
  1392 0000AB99 8807                <1> 	mov	[edi], al ; Drv 
  1393 0000AB9B 66B80100            <1> 	mov	ax, 1 ; eax = 1
  1394                              <1> 	; TR-DOS Error Code 01h = Bad Command Argument
  1395                              <1> 	; MS-DOS Error Code 01h : Invalid Function Number
  1396                              <1> 	;stc
  1397                              <1> 	; (MainProg ErrMsg: "Bad command or file name!")
  1398 0000AB9F C3                  <1> 	retn
  1399                              <1> 
  1400                              <1> pass_ppn_change_drive:
  1401 0000ABA0 8935[2A810100]      <1> 	mov	[First_Path_Pos], esi
  1402                              <1> 	;mov	dword [Last_Slash_Pos], 0
  1403                              <1> 	; 29/07/2022
  1404 0000ABA6 890D[2E810100]      <1> 	mov	[Last_Slash_Pos], ecx ; 0
  1405 0000ABAC AA                  <1> 	stosb
  1406 0000ABAD 8A06                <1> 	mov	al, [esi]
  1407                              <1> loc_scan_ppn_dslash:
  1408 0000ABAF 3C2F                <1> 	cmp	al, '/'
  1409 0000ABB1 7506                <1>   	jne	short loc_scan_next_slash_pos
  1410 0000ABB3 8935[2E810100]      <1> 	mov	[Last_Slash_Pos], esi
  1411                              <1> loc_scan_next_slash_pos:
  1412 0000ABB9 46                  <1> 	inc	esi
  1413 0000ABBA 8A06                <1> 	mov	al, [esi]
  1414 0000ABBC 3C20                <1> 	cmp	al, 20h
  1415 0000ABBE 77EF                <1> 	ja	short loc_scan_ppn_dslash
  1416                              <1> 	;cmp	dword [Last_Slash_Pos], 0
  1417                              <1> 	; 09/08/2022
  1418 0000ABC0 390D[2E810100]      <1> 	cmp	[Last_Slash_Pos], ecx ; 0 ?
  1419 0000ABC6 76A5                <1> 	jna	short pass_ppn_cdir
  1420                              <1> 	
  1421 0000ABC8 8B0D[2E810100]      <1> 	mov	ecx, [Last_Slash_Pos]
  1422 0000ABCE 8B35[2A810100]      <1> 	mov	esi, [First_Path_Pos]
  1423 0000ABD4 29F1                <1> 	sub	ecx, esi
  1424 0000ABD6 41                  <1> 	inc	ecx
  1425                              <1> 	;cmp	ecx, 64
  1426 0000ABD7 80F940              <1> 	cmp	cl, 64
  1427 0000ABDA 7715                <1> 	ja	short loc_ppn_invalid_drive_stc
  1428                              <1> 
  1429 0000ABDC 89F8                <1> 	mov	eax, edi ; Dest Dir String Location (65 byte)
  1430 0000ABDE F3A4                <1> 	rep	movsb
  1431                              <1> 	;mov	[edi], cl ; 0, End of Dir String
  1432 0000ABE0 8B35[2E810100]      <1> 	mov	esi, [Last_Slash_Pos]
  1433 0000ABE6 46                  <1> 	inc	esi
  1434 0000ABE7 89C7                <1> 	mov	edi, eax
  1435 0000ABE9 AC                  <1> 	lodsb
  1436 0000ABEA 3C21                <1> 	cmp	al, 21h
  1437 0000ABEC 7386                <1> 	jnb	short loc_ppn_get_filename
  1438                              <1> loc_ppn_clc_return:
  1439                              <1> 	;clc
  1440 0000ABEE 31C0                <1> 	xor	eax, eax
  1441 0000ABF0 C3                  <1> 	retn
  1442                              <1> 
  1443                              <1> loc_ppn_invalid_drive_stc:
  1444 0000ABF1 F5                  <1> 	cmc	 ; stc
  1445                              <1> loc_ppn_invalid_drive:
  1446                              <1> 	; cf = 1
  1447                              <1> 	; The Drive Letter/Char < "A" or > "Z"
  1448 0000ABF2 66B80F00            <1> 	mov	ax, 0Fh
  1449                              <1> 	; MS-DOS Error Code 0Fh = Disk Drive Invalid 
  1450                              <1> 	; (MainProg ErrMsg: "Drive not ready or read error!")
  1451 0000ABF6 C3                  <1> 	retn
  1452                              <1> 
  1453                              <1> find_longname:
  1454                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  1455                              <1> 	; 13/02/2016 (TRDOS 386 = TRDOS v2.0)
  1456                              <1> 	; 24/01/2010 (DIR.ASM, 'proc_find_longname')
  1457                              <1> 	; 17/10/2009
  1458                              <1> 	
  1459                              <1> 	; INPUT -> 
  1460                              <1> 	;	ESI = DOS short file name address
  1461                              <1> 	; 	for example: "filename.ext"
  1462                              <1> 	;
  1463                              <1> 	; OUTPUT ->
  1464                              <1> 	; 	ESI = ASCIIZ longname address (cf = 0)
  1465                              <1> 	;	cf = 1 -> error number returns in EAX (AL)
  1466                              <1> 	;	AL = 0 & CF=1 -> longname not found
  1467                              <1> 	;	     the file/directory has no longname
  1468                              <1> 	; 	cf = 0 -> AL = FAT Type 
  1469                              <1>  
  1470                              <1> 	; 17/10/2009
  1471                              <1> 	; ASCIIZ string will be returned
  1472                              <1> 	; as LongFileName
  1473                              <1> 	; clearing/reset is not needed
  1474                              <1> 	;mov	ecx, 33
  1475                              <1> 	;mov	edi, LongFileName
  1476                              <1> 	;sub	ax, ax ; 0
  1477                              <1> 	;rep	stosw
  1478                              <1> 
  1479                              <1> 	;mov	byte [LongNameFound], 0
  1480                              <1> 
  1481                              <1> 	; ESI = ASCIIZ file/directory name address
  1482                              <1> 	;   AL = Attributes AND mask 
  1483                              <1> 	;	(Result of AND must be equal to AL)
  1484                              <1> 	;   AH = Negative attributes mask 
  1485                              <1> 	;	(Result of AND must be ZERO)
  1486 0000ABF7 66B80008            <1> 	mov	ax, 0800h 
  1487                              <1> 		; it must not be volume name or longname
  1488 0000ABFB E890DEFFFF          <1> 	call	find_first_file
  1489 0000AC00 7212                <1> 	jc	short loc_fln_retn
  1490                              <1>  
  1491                              <1> loc_fln_check_FAT_Type:
  1492 0000AC02 803D[09780100]01    <1> 	cmp	byte [Current_FATType], 1
  1493 0000AC09 7302                <1> 	jnb	short loc_fln_check_longname_yes_sign
  1494                              <1> 
  1495                              <1> 	;call	get_fs_longname
  1496                              <1> 	;retn
  1497                              <1> 	; 29/07/2022
  1498 0000AC0B EB37                <1> 	jmp	get_fs_longname
  1499                              <1> 
  1500                              <1> loc_fln_check_longname_yes_sign:
  1501 0000AC0D 08FF                <1> 	or	bh, bh
  1502 0000AC0F 7504                <1> 	jnz	short loc_fln_check_longnamefound_number
  1503                              <1> loc_fln_longname_not_found_retn:
  1504 0000AC11 31C0                <1> 	xor	eax, eax 
  1505                              <1> 	; cf = 1 & al = 0 -> longname not found
  1506 0000AC13 F9                  <1> 	stc
  1507                              <1> loc_fln_retn:
  1508 0000AC14 C3                  <1> 	retn
  1509                              <1> 
  1510                              <1> loc_fln_check_longnamefound_number:
  1511                              <1> 	; 'LongNameFound' is set by
  1512                              <1>         ; by 'save_longname_sub_component'
  1513                              <1> 	; which is called from
  1514                              <1> 	; 'find_directory_entry' 
  1515                              <1> 	; which is called from 
  1516                              <1> 	; 'find_first_file'
  1517                              <1> 	; It must 1 if the longname is valid
  1518 0000AC15 803D[05800100]01    <1>         cmp     byte [LongNameFound], 1
  1519 0000AC1C 75F3                <1> 	jne	short loc_fln_longname_not_found_retn
  1520                              <1>              
  1521                              <1> loc_fln_calculate_checksum: 
  1522 0000AC1E E813000000          <1> 	call	calculate_checksum
  1523                              <1> 	; AL = shortname checksum
  1524                              <1> 
  1525                              <1> loc_fln_longname_validation:
  1526                              <1> 	; 'LFN_CheckSum' has been set already
  1527                              <1> 	; by 'save_longname_sub_component'
  1528                              <1> 	; which is called from
  1529                              <1> 	; 'find_directory_entry' 
  1530                              <1> 	; which is called from 
  1531                              <1> 	; 'find_first_file'
  1532 0000AC23 3805[07800100]      <1> 	cmp	[LFN_CheckSum], al
  1533 0000AC29 75E6                <1> 	jne	short loc_fln_longname_not_found_retn
  1534                              <1> 
  1535 0000AC2B BE[08800100]        <1> 	mov	esi, LongFileName
  1536 0000AC30 A0[09780100]        <1> 	mov	al, [Current_FATType]
  1537 0000AC35 C3                  <1> 	retn
  1538                              <1> 
  1539                              <1> calculate_checksum:
  1540                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  1541                              <1> 	; 13/02/2016 (TRDOS 386 = TRDOS v2.0)
  1542                              <1> 	; 17/10/2009 (DIR.ASM, 'proc_calculate_checksum')
  1543                              <1>         ;    
  1544                              <1> 	; INPUT ->
  1545                              <1> 	;	ESI = 11 byte DOS File Name location
  1546                              <1> 	;	(in DOS Directory Entry Format)
  1547                              <1> 	; OUTPUT ->
  1548                              <1> 	;	 AL = 8 bit checksum (CRC) value
  1549                              <1> 	;
  1550                              <1> 	; (Modified registers: EAX, ECX, ESI)
  1551                              <1> 
  1552                              <1> 	; Erdogan Tan [ 17-10-2009 ]
  1553                              <1> 	;  'ror al, 1' instruction
  1554                              <1> 
  1555                              <1> 	; Erdogan Tan [ 20-06-2004 ]
  1556                              <1> 	; This 8086 assembly code is an original code
  1557                              <1> 	; which is adapted from C code in
  1558                              <1> 	; Microsoft FAT32 File System Specification
  1559                              <1> 	; Version 1.03, December 6, 2000
  1560                              <1> 	; Page 28
  1561                              <1> 
  1562 0000AC36 30C0                <1> 	xor	al, al
  1563                              <1> 	;mov	ecx, 11
  1564                              <1> 	; 29/07/2022
  1565 0000AC38 29C9                <1> 	sub	ecx, ecx
  1566 0000AC3A B10B                <1> 	mov	cl, 11
  1567                              <1> loc_next_sum:
  1568                              <1> 	;xor	ah, ah
  1569                              <1> 	;test	al, 1
  1570                              <1> 	;jz	short pass_ah_80h
  1571                              <1> 	;mov	ah, 80h
  1572                              <1> ;pass_ah_80h:
  1573                              <1> 	;shr	al, 1
  1574 0000AC3C D0C8                <1> 	ror	al, 1 ; 17/10/2009  
  1575 0000AC3E 0206                <1> 	add	al, [esi]
  1576 0000AC40 46                  <1> 	inc	esi
  1577                              <1> 	;add	al, ah
  1578 0000AC41 E2F9                <1> 	loop	loc_next_sum
  1579 0000AC43 C3                  <1> 	retn
  1580                              <1> 
  1581                              <1> get_fs_longname:
  1582                              <1> 	; temporary (13/02/2016)
  1583 0000AC44 31C0                <1> 	xor	eax, eax
  1584 0000AC46 F9                  <1> 	stc
  1585 0000AC47 C3                  <1> 	retn
  1586                              <1> 
  1587                              <1> make_sub_directory:
  1588                              <1> 	; 07/08/2022
  1589                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  1590                              <1> 	; 16/10/2016
  1591                              <1> 	; 02/03/2016, 03/03/2016
  1592                              <1> 	; 26/02/2016, 27/02/2016
  1593                              <1> 	; 21/02/2016 (TRDOS 386 = TRDOS v2.0)
  1594                              <1> 	; 01/08/2011 (DIR.ASM, 'proc_make_directory')
  1595                              <1> 	; 10/07/2010
  1596                              <1> 	; INPUT ->
  1597                              <1> 	; 	ESI = ASCIIZ Directory Name
  1598                              <1> 	;	CL = Directory Attributes
  1599                              <1> 	; OUTPUT ->
  1600                              <1> 	;	EAX = New sub dir's first cluster
  1601                              <1> 	;	ESI = Logical Dos Drv Descr. Table Addr.
  1602                              <1> 	;	CF = 1 -> error code in AL (EAX)
  1603                              <1> 
  1604                              <1> 	;test	cl, 10h  ; directory
  1605                              <1> 	;jz	short loc_make_directory_access_denied
  1606                              <1> 	;test	cl, 08h ; volume name
  1607                              <1> 	;jnz	short loc_make_directory_access_denied
  1608                              <1> 
  1609 0000AC48 80E107              <1> 	and	cl, 07h
  1610 0000AC4B 880D[84810100]      <1> 	mov	byte [mkdir_attrib], cl
  1611                              <1> 
  1612 0000AC51 56                  <1> 	push	esi
  1613 0000AC52 31DB                <1> 	xor	ebx, ebx
  1614 0000AC54 8A3D[0A780100]      <1> 	mov	bh, [Current_Drv]
  1615 0000AC5A BE00010900          <1> 	mov	esi, Logical_DOSDisks
  1616 0000AC5F 01DE                <1> 	add	esi, ebx
  1617 0000AC61 5B                  <1> 	pop	ebx
  1618                              <1> 
  1619                              <1> 	; 10/07/2010 -> 1st writable disk check for trdos
  1620                              <1> 	; LD_DiskType = 0 for write protection (read only) 
  1621 0000AC62 807E0101            <1> 	cmp	byte [esi+LD_DiskType], 1 ; 0 = Invalid
  1622 0000AC66 7308                <1> 	jnb	short loc_mkdir_check_file_sytem
  1623                              <1> 	; 16/10/2016 (13h -> 30)
  1624                              <1> 	;mov	eax, 30 ; 'Disk write-protected' error
  1625                              <1> 	;mov	edx, 0
  1626                              <1> 	; 29/07/2022
  1627 0000AC68 29C0                <1> 	sub	eax, eax
  1628 0000AC6A B01E                <1> 	mov	al, 30
  1629 0000AC6C 29D2                <1> 	sub	edx, edx ; 0
  1630 0000AC6E F9                  <1> 	stc
  1631                              <1> 	; err retn: EDX = 0, EBX = Dir name offset
  1632                              <1> 	;ESI = Logical DOS drive description table address
  1633 0000AC6F C3                  <1> 	retn
  1634                              <1> 
  1635                              <1> ;loc_make_directory_access_denied:
  1636                              <1> 	;mov	ax, 05h ; access denied (invalid attributes input)
  1637                              <1> 	;stc
  1638                              <1> 	;retn
  1639                              <1> 
  1640                              <1> loc_mkdir_check_file_sytem:
  1641 0000AC70 807E0301            <1> 	cmp	byte [esi+LD_FATType], 1
  1642 0000AC74 730A                <1> 	jnb	short loc_mkdir_check_free_sectors
  1643                              <1> 
  1644                              <1> loc_make_fs_directory:
  1645 0000AC76 A1[04780100]        <1> 	mov	eax, [Current_Dir_FCluster]
  1646                              <1> 	
  1647                              <1> 	; EAX = Parent directory DDT Address
  1648                              <1> 	; ESI = Logical DOS Drive DT Address
  1649                              <1> 	; EBX = Directory name offset (as ASCIIZ name)
  1650                              <1> 	
  1651                              <1> 	;call	make_fs_directory
  1652                              <1> 	;retn
  1653                              <1> 	; 29/07/2022
  1654 0000AC7B E986150000          <1> 	jmp	make_fs_directory  
  1655                              <1> 
  1656                              <1> loc_mkdir_check_free_sectors:
  1657 0000AC80 0FB64613            <1>         movzx   eax, byte [esi+LD_BPB+SecPerClust]
  1658 0000AC84 8B4E74              <1> 	mov	ecx, [esi+LD_FreeSectors]
  1659 0000AC87 39C1                <1> 	cmp	ecx, eax
  1660 0000AC89 7254                <1> 	jb	short loc_mkdir_insufficient_disk_space
  1661                              <1> 
  1662                              <1> loc_make_fat_directory:
  1663 0000AC8B 891D[74810100]      <1> 	mov	[mkdir_DirName_Offset], ebx
  1664 0000AC91 890D[80810100]      <1> 	mov	[mkdir_FreeSectors], ecx
  1665                              <1> 
  1666                              <1> 	;mov	al, [esi+LD_BPB+SecPerClust]
  1667 0000AC97 A2[86810100]        <1> 	mov	byte [mkdir_SecPerClust], al
  1668                              <1> 
  1669                              <1> loc_mkdir_gffc_1:
  1670 0000AC9C E888170000          <1> 	call	get_first_free_cluster
  1671 0000ACA1 722A                <1> 	jc	short loc_mkdir_gffc_retn
  1672                              <1> 
  1673                              <1> ;loc_mkdir_gffc_1_cont: 
  1674                              <1> 	;cmp	eax, 2
  1675                              <1> 	;jb	short loc_mkdir_gffc_insufficient_disk_space
  1676                              <1> 
  1677                              <1> ;loc_mkdir_gffc_1_save_fcluster:  
  1678 0000ACA3 A3[78810100]        <1> 	mov	[mkdir_FFCluster], eax
  1679                              <1> 
  1680                              <1> loc_mkdir_locate_ffe:
  1681                              <1> 	; Current directory fcluster <> Directory buffer cluster
  1682                              <1> 	; Current directory will be reloaded by
  1683                              <1> 	; 'locate_current_dir_file' procedure
  1684                              <1> 	;
  1685                              <1> 	; ESI = Logical DOS Drive Description Table Address 
  1686                              <1> 	;push	esi ; 27/02/2016
  1687 0000ACA8 31C0                <1> 	xor	eax, eax
  1688 0000ACAA 89C1                <1>         mov	ecx, eax
  1689 0000ACAC 6649                <1> 	dec	cx ; FFFFh  
  1690                              <1> 	; CX = FFFFh -> find first deleted or free entry
  1691                              <1> 	; ESI would be ASCIIZ filename address if the call
  1692                              <1> 	; would not be for first free or deleted dir entry
  1693 0000ACAE E808FBFFFF          <1> 	call	locate_current_dir_file
  1694 0000ACB3 734A                <1> 	jnc	short loc_mkdir_set_ff_dir_entry_1
  1695                              <1> 	;pop	esi 
  1696                              <1> 	; ESI = Logical DOS Drive Description Table Address 
  1697 0000ACB5 83F802              <1> 	cmp	eax, 2  ; cmp al, 2 ; File/Dir not found !
  1698 0000ACB8 7529                <1> 	jne	short loc_mkdir_stc_return
  1699                              <1> 
  1700                              <1> loc_mkdir_add_new_cluster:
  1701 0000ACBA 3805[09780100]      <1> 	cmp	byte [Current_FATType], al ; 2
  1702                              <1> 	;cmp	byte ptr [esi+LD_FATType], 2
  1703 0000ACC0 770C                <1> 	ja	short loc_mkdir_add_new_cluster_check_fsc
  1704 0000ACC2 803D[08780100]01    <1> 	cmp	byte [Current_Dir_Level], 1
  1705                              <1> 	;cmp	byte [esi+LD_CDirLevel], 1
  1706 0000ACC9 7303                <1> 	jnb	short loc_mkdir_add_new_cluster_check_fsc
  1707                              <1> 
  1708 0000ACCB B00C                <1> 	mov	al, 12 ; No more files 
  1709                              <1> loc_mkdir_gffc_retn:
  1710 0000ACCD C3                  <1> 	retn
  1711                              <1> 
  1712                              <1> loc_mkdir_add_new_cluster_check_fsc:
  1713 0000ACCE 8B0D[80810100]      <1> 	mov	ecx, [mkdir_FreeSectors]
  1714                              <1> 	;movzx	eax, byte [mkdir_SecPerClust]
  1715 0000ACD4 A0[86810100]        <1> 	mov	al, [mkdir_SecPerClust]
  1716                              <1> 	;shl	ax, 1 ; AX = 2 * AX
  1717                              <1> 	; 29/07/2022
  1718 0000ACD9 D1E0                <1> 	shl	eax, 1
  1719 0000ACDB 39C1                <1> 	cmp	ecx, eax
  1720 0000ACDD 7350                <1> 	jnb	short loc_mkdir_add_new_subdir_cluster
  1721                              <1> 
  1722                              <1> loc_mkdir_insufficient_disk_space:
  1723                              <1> 	;mov	edx, ecx
  1724                              <1> ;loc_mkdir_gffc_insufficient_disk_space:
  1725                              <1> 	; 29/07/2022
  1726                              <1> 	;mov	ax, 27h ; MSDOS err => insufficient disk space
  1727                              <1> 	
  1728                              <1> 	; err retn: EDX = Free sectors, EBX = Dir name offset
  1729                              <1>         ; ESI -> Dos drive description table address
  1730                              <1> 	;; ecx = edx
  1731                              <1> 	
  1732                              <1> 	;retn
  1733                              <1> 	
  1734                              <1> 	; 29/07/2022
  1735 0000ACDF 30E4                <1> 	xor	ah, ah
  1736 0000ACE1 B027                <1> 	mov	al, 27h
  1737                              <1> 
  1738                              <1> loc_mkdir_stc_return:
  1739 0000ACE3 F9                  <1> 	stc
  1740 0000ACE4 C3                  <1> 	retn 
  1741                              <1> 
  1742                              <1> loc_mkdir_gffc_2:
  1743 0000ACE5 E83F170000          <1> 	call	get_first_free_cluster
  1744 0000ACEA 72E1                <1> 	jc	short loc_mkdir_gffc_retn
  1745                              <1> 
  1746                              <1> ;loc_mkdir_gffc_1_cont: 
  1747                              <1> 	;cmp	eax, 2
  1748                              <1> 	;jb	short loc_mkdir_gffc_insufficient_disk_space
  1749                              <1> 
  1750                              <1> ;loc_mkdir_gffc_2_save_fcluster:  
  1751 0000ACEC A3[78810100]        <1> 	mov	[mkdir_FFCluster], eax
  1752                              <1> 
  1753 0000ACF1 A1[7C810100]        <1> 	mov	eax, [mkdir_LastDirCluster]
  1754                              <1> 
  1755 0000ACF6 E8C8160000          <1> 	call	load_FAT_sub_directory 
  1756 0000ACFB 72D0                <1> 	jc	short loc_mkdir_gffc_retn
  1757                              <1> 
  1758 0000ACFD 31FF                <1> 	xor	edi, edi
  1759                              <1> loc_mkdir_set_ff_dir_entry_1:
  1760                              <1> 	; 27/02/2016
  1761 0000ACFF 56                  <1> 	push	esi ; Logical DOS Drv Desc. Tbl. address
  1762                              <1> 	; EDI = Directory Entry Address
  1763 0000AD00 8B35[74810100]      <1> 	mov	esi, [mkdir_DirName_Offset]
  1764 0000AD06 A1[78810100]        <1> 	mov	eax, [mkdir_FFCluster]
  1765                              <1> 
  1766 0000AD0B 66B91000            <1> 	mov	cx, 10h	; CL = Directory attribute
  1767                              <1> 			; CH = 0 -> File size is 0
  1768 0000AD0F 0A0D[84810100]      <1> 	or	cl, [mkdir_attrib] ; S, H, R  
  1769 0000AD15 E8A3010000          <1> 	call	make_directory_entry
  1770                              <1> 
  1771 0000AD1A 5E                  <1> 	pop	esi
  1772                              <1> 
  1773 0000AD1B C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2
  1774 0000AD22 E869020000          <1> 	call	save_directory_buffer
  1775                              <1>         ;jnc	loc_mkdir_set_ff_dir_entry_2
  1776                              <1> 	; 29/07/2022
  1777 0000AD27 7205                <1> 	jc	short loc_mkdir_return
  1778 0000AD29 E9CA000000          <1> 	jmp	loc_mkdir_set_ff_dir_entry_2
  1779                              <1> 
  1780                              <1> loc_mkdir_return:
  1781 0000AD2E C3                  <1> 	retn
  1782                              <1> 
  1783                              <1> loc_mkdir_add_new_subdir_cluster:
  1784 0000AD2F 8B15[367F0100]      <1> 	mov	edx, [DirBuff_Cluster]
  1785 0000AD35 8915[7C810100]      <1> 	mov	[mkdir_LastDirCluster], edx       
  1786                              <1> 
  1787 0000AD3B A1[78810100]        <1> 	mov	eax, [mkdir_FFCluster]
  1788 0000AD40 E87E160000          <1> 	call	load_FAT_sub_directory 
  1789 0000AD45 72E7                <1> 	jc	short loc_mkdir_return
  1790                              <1> 	; eax = 0
  1791                              <1> 	; ecx = directory buffer sector count (<= 128)
  1792                              <1> 
  1793                              <1> pass_mkdir_add_new_subdir_cluster:
  1794                              <1> 
  1795                              <1> ; 29/07/2022
  1796                              <1> ;	;sub	edi, edi ; 0
  1797                              <1> ;	; 29/07/2022 - BUGFIX !
  1798                              <1> ;	mov	edi, Directory_Buffer
  1799                              <1> ;
  1800                              <1> ;	;mov	al, 128 ; double word
  1801                              <1> ;	;mul	ecx ; ecx =  directory buffer sector count
  1802                              <1> ;	;mov	ecx, eax
  1803                              <1> ;	;shl	cx, 7 ; 128 * sector count	
  1804                              <1> ;	mov	ax, [esi+LD_BPB+BytesPerSec] ; 512
  1805                              <1> ;	;shr	ax, 2 ; 'byte count / 4' for 'stosd'
  1806                              <1> ;	; 29/07/2022
  1807                              <1> ;	shr	eax, 2
  1808                              <1> ;	;mul	cx ; max = 128*(512/4) -> 16384 (stosd)
  1809                              <1> ;	;mov	cx, ax
  1810                              <1> ;	;sub	ax, ax ; 0
  1811                              <1> ;	; 29/07/2022
  1812                              <1> ;	mul	ecx
  1813                              <1> ;	mov	ecx, eax
  1814                              <1> ;	sub	eax, eax
  1815                              <1> ;	rep	stosd ; clear directory buffer
  1816                              <1> 
  1817                              <1> 	; 29/07/2022
  1818 0000AD47 E85C010000          <1> 	call	clear_directory_buffer
  1819                              <1> 
  1820 0000AD4C C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2
  1821 0000AD53 E838020000          <1> 	call	save_directory_buffer 
  1822 0000AD58 72D4                <1> 	jc	short loc_mkdir_return
  1823                              <1> 
  1824                              <1> loc_mkdir_save_added_cluster:
  1825 0000AD5A A1[7C810100]        <1> 	mov	eax, [mkdir_LastDirCluster]
  1826 0000AD5F 8B0D[78810100]      <1> 	mov	ecx, [mkdir_FFCluster]
  1827                              <1> 	; 01/03/2016
  1828 0000AD65 31D2                <1> 	xor	edx, edx
  1829 0000AD67 8915[267F0100]      <1> 	mov	[FAT_ClusterCounter], edx ; 0 ; reset
  1830 0000AD6D E884170000          <1> 	call	update_cluster
  1831 0000AD72 7304                <1> 	jnc	short loc_mkdir_save_fat_buffer_0
  1832 0000AD74 09C0                <1> 	or	eax, eax ; EAX = 0 -> cluster value is 0 or eocc
  1833 0000AD76 7518                <1> 	jnz	short loc_mkdir_save_fat_buffer_stc_retn
  1834                              <1> 
  1835                              <1> loc_mkdir_save_fat_buffer_0:
  1836 0000AD78 A1[78810100]        <1> 	mov	eax, [mkdir_FFCluster]
  1837 0000AD7D A3[7C810100]        <1> 	mov	[mkdir_LastDirCluster], eax
  1838                              <1> 
  1839 0000AD82 31C9                <1> 	xor	ecx, ecx
  1840 0000AD84 49                  <1> 	dec	ecx ; FFFFFFFFh
  1841                              <1> 	; ESI = Logical DOS Drive Description Table address 
  1842 0000AD85 E86C170000          <1> 	call	update_cluster
  1843 0000AD8A 731A                <1> 	jnc	short loc_mkdir_save_fat_buffer_1
  1844 0000AD8C 09C0                <1> 	or	eax, eax
  1845 0000AD8E 7416                <1> 	jz	short loc_mkdir_save_fat_buffer_1
  1846                              <1> 
  1847                              <1> loc_mkdir_save_fat_buffer_stc_retn:
  1848                              <1> 	; 01/03/2016
  1849 0000AD90 803D[267F0100]01    <1> 	cmp	byte [FAT_ClusterCounter], 1
  1850 0000AD97 720C                <1> 	jb	short loc_mkdir_save_fat_buffer_retn
  1851                              <1> 
  1852 0000AD99 66BB00FF            <1> 	mov	bx, 0FF00h ; recalculate free space (BL = 0)
  1853                              <1> 			   ; (BH = FFh -> Use ESI as Drv Param. Tbl.)
  1854 0000AD9D 50                  <1> 	push	eax
  1855 0000AD9E E8671A0000          <1> 	call	calculate_fat_freespace
  1856 0000ADA3 58                  <1> 	pop	eax
  1857 0000ADA4 F9                  <1> 	stc
  1858                              <1> loc_mkdir_save_fat_buffer_retn:
  1859 0000ADA5 C3                  <1> 	retn
  1860                              <1> 
  1861                              <1> loc_mkdir_save_fat_buffer_1:
  1862                              <1> 	; byte [FAT_BuffValidData] = 2 
  1863 0000ADA6 E8CE190000          <1> 	call	save_fat_buffer
  1864 0000ADAB 72E3                <1> 	jc	short loc_mkdir_save_fat_buffer_stc_retn
  1865                              <1> 
  1866                              <1> 	; 01/03/2016
  1867 0000ADAD 803D[267F0100]01    <1> 	cmp	byte [FAT_ClusterCounter], 1
  1868 0000ADB4 721B                <1> 	jb	short loc_mkdir_save_fat_buffer_2
  1869                              <1> 
  1870                              <1> 	; ESI = Logical DOS Drive Description Table address 
  1871 0000ADB6 A1[267F0100]        <1> 	mov	eax, [FAT_ClusterCounter]
  1872 0000ADBB 66BB01FF            <1> 	mov	bx, 0FF01h ; add free clusters 
  1873 0000ADBF E8461A0000          <1> 	call	calculate_fat_freespace
  1874                              <1> 
  1875                              <1> 	;inc	eax ; 0FFFFFFFFh -> 0 ; recalculation is needed!
  1876                              <1> 	;jnz	short loc_mkdir_save_fat_buffer_2
  1877                              <1> 
  1878                              <1> 	; ecx > 0 -> Recalculation is needed
  1879 0000ADC4 09C9                <1> 	or	ecx, ecx 
  1880 0000ADC6 7409                <1> 	jz	short loc_mkdir_save_fat_buffer_2
  1881                              <1> 
  1882 0000ADC8 66BB00FF            <1> 	mov	bx, 0FF00h ; ; recalculate free space
  1883 0000ADCC E8391A0000          <1> 	call	calculate_fat_freespace
  1884                              <1> 
  1885                              <1> loc_mkdir_save_fat_buffer_2:
  1886 0000ADD1 C605[87810100]01    <1> 	mov	byte [mkdir_add_new_cluster], 1
  1887 0000ADD8 E9B0000000          <1> 	jmp	loc_mkdir_upd_parent_dir_lmdt
  1888                              <1> 
  1889                              <1> loc_mkdir_update_sub_dir_cluster:
  1890 0000ADDD A1[78810100]        <1> 	mov	eax, [mkdir_FFCluster]
  1891 0000ADE2 29C9                <1> 	sub	ecx, ecx ; 0
  1892                              <1> 	; 01/03/2016
  1893 0000ADE4 890D[267F0100]      <1> 	mov	[FAT_ClusterCounter], ecx ; 0 ; Reset
  1894 0000ADEA 49                  <1> 	dec	ecx ; 0FFFFFFFFh
  1895                              <1> 
  1896                              <1> 	; ESI = Logical DOS Drive Descisption Table address  
  1897 0000ADEB E806170000          <1> 	call	update_cluster
  1898 0000ADF0 7364                <1> 	jnc	short loc_mkdir_save_fat_buffer_3
  1899 0000ADF2 09C0                <1> 	or	eax, eax ; EAX = 0 -> cluster value is 0 or eocc
  1900 0000ADF4 7460                <1> 	jz	short loc_mkdir_save_fat_buffer_3
  1901                              <1> 	; 01/03/2016
  1902 0000ADF6 EB98                <1> 	jmp	short loc_mkdir_save_fat_buffer_stc_retn
  1903                              <1> 
  1904                              <1> loc_mkdir_set_ff_dir_entry_2:
  1905                              <1> 	; ESI = Logical DOS Drive Description Table address  
  1906 0000ADF8 A1[78810100]        <1> 	mov	eax, [mkdir_FFCluster]
  1907                              <1> 	; Load disk sectors as a directory cluster
  1908 0000ADFD E8C1150000          <1> 	call	load_FAT_sub_directory 
  1909 0000AE02 7251                <1> 	jc	short retn_make_fat_directory
  1910                              <1> 	
  1911                              <1> 	; eax = 0
  1912                              <1> 	; ecx = directory buffer sector count (<= 128)
  1913                              <1> 
  1914                              <1> ; 29/07/2022
  1915                              <1> ;	mov	edi, Directory_Buffer + 64 ; 26/02/2016
  1916                              <1> ;
  1917                              <1> ;	; 02/03/2016
  1918                              <1> ;	mov	ax, [esi+LD_BPB+BytesPerSec] ; 512
  1919                              <1> ;	;shr	ax, 2 ; 'byte count / 4' for 'stosd'
  1920                              <1> ;	; 29/07/2022
  1921                              <1> ;	shr	eax, 2
  1922                              <1> ;	mul 	ecx
  1923                              <1> ;	mov	ecx, eax
  1924                              <1> ;	;
  1925                              <1> ;	; 29/07/2022 - BUGFIX !
  1926                              <1> ;	sub	ecx, 16 ; - 64 bytes
  1927                              <1> ;			; (space for '.' & '..' entries)
  1928                              <1> ;	;sub	ax, ax
  1929                              <1> ;	sub	eax, eax
  1930                              <1> ;	rep	stosd
  1931                              <1> ;
  1932                              <1> ;	;;mov	al, 128 ; double word (count in sector)
  1933                              <1> ;	;;mul	ecx ; ecx = directory buffer sector count
  1934                              <1> ;	;;mov	ecx, eax
  1935                              <1> ;	;shl	cx, 7 ; 128 * sector count
  1936                              <1> ;	;sub	ecx, 64 ; 29/07/2022
  1937                              <1> ;	;;sub	eax, eax
  1938                              <1> ;	;;sub	al, al ; 0
  1939                              <1> ;	;rep	stosd ; clear directory buffer
  1940                              <1> 
  1941                              <1> 	; 29/07/2022
  1942 0000AE04 E89F000000          <1> 	call	clear_directory_buffer
  1943                              <1> 
  1944 0000AE09 BF00000800          <1> 	mov	edi, Directory_Buffer ; 26/02/2016
  1945                              <1> 	
  1946 0000AE0E 56                  <1> 	push	esi
  1947                              <1> 
  1948 0000AE0F BE[88810100]        <1> 	mov	esi, mkdir_Name
  1949 0000AE14 66C7062E00          <1> 	mov	word [esi], 2Eh ; db '.', '0'
  1950                              <1> 
  1951 0000AE19 A1[78810100]        <1> 	mov	eax, [mkdir_FFCluster]
  1952                              <1> 	;mov	cx, 10h ; CL = Directory attribute
  1953                              <1> 			; CH = 0 -> File size is 0
  1954                              <1> 	; 29/07/2022
  1955 0000AE1E B110                <1> 	mov	cl, 10h
  1956 0000AE20 E898000000          <1> 	call	make_directory_entry
  1957                              <1> 
  1958 0000AE25 BF20000800          <1> 	mov	edi, Directory_Buffer + 32 ; 26/02/2016
  1959                              <1> 
  1960                              <1> 	; 03/03/2016
  1961                              <1> 	; Following modification has been done according to 
  1962                              <1> 	; 'Microsoft Extensible Firmware Initiative
  1963                              <1> 	; FAT32 File System Specification' document,
  1964                              <1> 	; 'FAT: General Overview of On-Disk FormatPage 25'.
  1965                              <1> 	; "Finally, you set DIR_FstClusLO and DIR_FstClusHI
  1966                              <1> 	; for the dotdot entry (the second entry) to the
  1967                              <1> 	; first cluster number of the directory in which you 
  1968                              <1> 	; just created the directory (value is 0 if this directory
  1969                              <1> 	; is the root directory even for FAT32 volumes)."
  1970                              <1> 	; (Correctness of this modification has been verified
  1971                              <1> 	;  by using Windows 98 'scandisk.exe'.)
  1972                              <1> 
  1973 0000AE2A 29C0                <1> 	sub	eax, eax
  1974 0000AE2C 3805[08780100]      <1> 	cmp	byte [Current_Dir_Level], al ; 0
  1975 0000AE32 7605                <1> 	jna	short loc_mkdir_set_ff_dir_entry_3
  1976 0000AE34 A1[04780100]        <1> 	mov	eax, [Current_Dir_FCluster] ; parent dir
  1977                              <1> loc_mkdir_set_ff_dir_entry_3:
  1978 0000AE39 66C746012E00        <1> 	mov	word [esi+1], 2Eh ; db '.', '0'
  1979                              <1> 
  1980                              <1> 	;mov	cx, 10h
  1981 0000AE3F E879000000          <1> 	call	make_directory_entry
  1982                              <1> 
  1983 0000AE44 5E                  <1> 	pop	esi
  1984                              <1> 
  1985 0000AE45 C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2
  1986 0000AE4C E83F010000          <1> 	call	save_directory_buffer
  1987                              <1> 	;jnc	loc_mkdir_update_sub_dir_cluster
  1988                              <1> 	; 29/07/2022
  1989 0000AE51 7202                <1> 	jc	short retn_make_fat_directory
  1990 0000AE53 EB88                <1> 	jmp	loc_mkdir_update_sub_dir_cluster
  1991                              <1> 
  1992                              <1> retn_make_fat_directory:
  1993 0000AE55 C3                  <1> 	retn
  1994                              <1> 
  1995                              <1> loc_mkdir_save_fat_buffer_3:
  1996                              <1> 	; 01/03/2016
  1997                              <1> 	; byte [FAT_BuffValidData] = 2 
  1998 0000AE56 E81E190000          <1> 	call	save_fat_buffer
  1999                              <1> 	;jc	short loc_mkdir_save_fat_buffer_stc_retn
  2000                              <1> 	; 07/08/2022
  2001 0000AE5B 7305                <1> 	jnc	short loc_mkdir_save_fat_buffer_4
  2002 0000AE5D E92EFFFFFF          <1> 	jmp	loc_mkdir_save_fat_buffer_stc_retn
  2003                              <1> 
  2004                              <1> loc_mkdir_save_fat_buffer_4:
  2005 0000AE62 803D[267F0100]01    <1> 	cmp	byte [FAT_ClusterCounter], 1
  2006 0000AE69 721B                <1> 	jb	short loc_mkdir_save_fat_buffer_5
  2007                              <1> 
  2008                              <1> 	; ESI = Logical DOS Drive Description Table address 
  2009 0000AE6B A1[267F0100]        <1> 	mov	eax, [FAT_ClusterCounter]
  2010 0000AE70 66BB01FF            <1> 	mov	bx, 0FF01h ; add free clusters 
  2011 0000AE74 E891190000          <1> 	call	calculate_fat_freespace
  2012                              <1> 
  2013                              <1> 	;inc	eax ; 0FFFFFFFFh -> 0 ; recalculation is needed!
  2014                              <1>         ;jnz    short loc_mkdir_save_fat_buffer_5
  2015                              <1> 
  2016                              <1> 	; ecx > 0 -> Recalculation is needed
  2017 0000AE79 09C9                <1> 	or	ecx, ecx 
  2018 0000AE7B 7409                <1>         jz      short loc_mkdir_save_fat_buffer_5
  2019                              <1> 
  2020 0000AE7D 66BB00FF            <1> 	mov	bx, 0FF00h ; recalculate free space
  2021 0000AE81 E884190000          <1> 	call	calculate_fat_freespace
  2022                              <1> 
  2023                              <1> loc_mkdir_save_fat_buffer_5:	
  2024 0000AE86 C605[87810100]00    <1> 	mov	byte [mkdir_add_new_cluster], 0
  2025                              <1> 
  2026                              <1> loc_mkdir_upd_parent_dir_lmdt:
  2027 0000AE8D E896010000          <1> 	call	update_parent_dir_lmdt
  2028                              <1> 
  2029                              <1> 	; 01/03/2016
  2030 0000AE92 803D[87810100]00    <1> 	cmp	byte [mkdir_add_new_cluster], 0
  2031                              <1> 	;ja	loc_mkdir_gffc_2
  2032                              <1> 	; 29/07/2022
  2033 0000AE99 7605                <1> 	jna	short loc_mkdir_retn_new_dir_cluster
  2034 0000AE9B E945FEFFFF          <1> 	jmp	loc_mkdir_gffc_2
  2035                              <1> 
  2036                              <1> loc_mkdir_retn_new_dir_cluster:
  2037 0000AEA0 A1[78810100]        <1> 	mov	eax, [mkdir_FFCluster]
  2038 0000AEA5 31D2                <1> 	xor	edx, edx
  2039                              <1> loc_mkdir_retn:
  2040 0000AEA7 C3                  <1> 	retn
  2041                              <1> 
  2042                              <1> clear_directory_buffer:
  2043                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  2044                              <1> 	;
  2045                              <1> 	; eax = 0
  2046                              <1> 	; ecx = directory buffer sector count (<= 128)
  2047                              <1> 	;
  2048 0000AEA8 BF00000800          <1> 	mov	edi, Directory_Buffer
  2049                              <1> 	;mov	al, 128 ; double word
  2050                              <1> 	;mul	ecx ; ecx = directory buffer sector count
  2051                              <1> 	;mov	ecx, eax
  2052                              <1> 	;shl	cx, 7 ; 128 * sector count	
  2053 0000AEAD 668B4611            <1> 	mov	ax, [esi+LD_BPB+BytesPerSec] ; 512
  2054 0000AEB1 C1E802              <1> 	shr	eax, 2 ; 'byte count / 4' for 'stosd'
  2055 0000AEB4 F7E1                <1> 	mul	ecx ; max = 128*(512/4) -> 16384 (stosd)
  2056 0000AEB6 89C1                <1> 	mov	ecx, eax
  2057 0000AEB8 29C0                <1> 	sub	eax, eax
  2058 0000AEBA F3AB                <1> 	rep	stosd ; clear directory buffer
  2059 0000AEBC C3                  <1> 	retn
  2060                              <1> 
  2061                              <1> make_directory_entry:
  2062                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  2063                              <1> 	; 02/03/2016
  2064                              <1> 	; 21/02/2016 (TRDOS 386 = TRDOS v2.0)
  2065                              <1> 	; 09/08/2010 (DIR.ASM, 'proc_make_directory_entry')
  2066                              <1> 	; 17/07/2010
  2067                              <1> 	; INPUT ->
  2068                              <1> 	; 	EDI = Directory Entry Address
  2069                              <1> 	;	ESI = Dot File Name Location
  2070                              <1> 	;	EAX = First Cluster
  2071                              <1> 	;	File Size = 0 (Must be set later)
  2072                              <1> 	;	CL = Attributes
  2073                              <1> 	;	CH = 0 (File size = 0) 
  2074                              <1> 	;	(If CH>0, File size is in dword [EBX]) (*)
  2075                              <1> 	; OUTPUT -> 
  2076                              <1> 	;	EDI = Directory Entry Address
  2077                              <1> 	;	ESI = Dot File Name Location (Capitalized)
  2078                              <1> 	;	If CH input = 0, File Size = 0
  2079                              <1> 	;	Otherwise file size is as dword [EBX] (*)
  2080                              <1> 	;	DX = Date, AX = Time in DOS Dir Entry format
  2081                              <1> 	;	EBX = same
  2082                              <1> 	;	ECX = same
  2083                              <1> 
  2084 0000AEBD 51                  <1> 	push	ecx
  2085                              <1> 
  2086 0000AEBE 884F0B              <1> 	mov	[edi+11], cl ; Attributes
  2087 0000AEC1 6689471A            <1> 	mov	[edi+26], ax ; FClusterLw, 26
  2088 0000AEC5 C1E810              <1> 	shr	eax, 16
  2089 0000AEC8 66894714            <1> 	mov	[edi+20], ax ; FClusterHw, 20
  2090                              <1> 	;xor	ax, ax 
  2091                              <1> 	; 29/07/2022
  2092 0000AECC 31C0                <1> 	xor	eax, eax
  2093 0000AECE 6689470C            <1> 	mov	[edi+12], ax ; NTReserved, 12
  2094                              <1> 			     ; CrtTimeTenth, 13
  2095 0000AED2 08ED                <1> 	or	ch, ch
  2096 0000AED4 7402                <1> 	jz	short loc_make_direntry_set_filesize
  2097                              <1> 
  2098 0000AED6 8B03                <1> 	mov	eax, [ebx]
  2099                              <1>         
  2100                              <1> loc_make_direntry_set_filesize:
  2101 0000AED8 89471C              <1> 	mov	[edi+28], eax ; FileSize, 28
  2102                              <1> 	
  2103 0000AEDB E8AAFBFFFF          <1> 	call	convert_file_name
  2104                              <1> 	;EDI = Dir Entry Format File Name Location
  2105                              <1> 	;ESI = Dot File Name Location (capitalized)
  2106                              <1> 
  2107 0000AEE0 E816000000          <1> 	call	convert_current_date_time
  2108                              <1> 	; OUTPUT -> DX = Date in dos dir entry format
  2109                              <1>         ; 	    AX = Time in dos dir entry format
  2110 0000AEE5 6689470E            <1> 	mov	[edi+14], ax ; CrtTime, 14
  2111 0000AEE9 66895710            <1> 	mov	[edi+16], dx ; CrtDate, 16
  2112 0000AEED 66895712            <1> 	mov	[edi+18], dx ; LastAccDate, 18
  2113 0000AEF1 66894716            <1> 	mov	[edi+22], ax ; WrtTime, 14
  2114 0000AEF5 66895718            <1> 	mov	[edi+24], dx ; WrtDate, 16
  2115 0000AEF9 59                  <1> 	pop	ecx
  2116                              <1> 
  2117 0000AEFA C3                  <1> 	retn
  2118                              <1> 
  2119                              <1> convert_current_date_time:
  2120                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  2121                              <1> 	; 21/02/2016 (TRDOS 386 = TRDOS v2.0)
  2122                              <1> 	; 13/06/2010 (DIR.ASM, 'proc_convert_current_date_time')
  2123                              <1> 	; converts date&time to dos dir entry format
  2124                              <1> 	; INPUT -> none
  2125                              <1> 	; OUTPUT -> DX = Date in dos dir entry format
  2126                              <1> 	;           AX = Time in dos dir entry format
  2127                              <1>  
  2128 0000AEFB B404                <1> 	mov	ah, 04h ; Return Current Date
  2129 0000AEFD E8D3B2FFFF          <1> 	call	int1Ah 
  2130                              <1> 
  2131 0000AF02 88E8                <1> 	mov	al, ch ; <- century BCD
  2132 0000AF04 240F                <1> 	and	al, 0Fh
  2133 0000AF06 88EC                <1> 	mov	ah, ch
  2134 0000AF08 C0EC04              <1> 	shr	ah, 4
  2135 0000AF0B D50A                <1> 	aad
  2136 0000AF0D 88C5                <1> 	mov	ch, al ; -> century 
  2137                              <1> 
  2138 0000AF0F 88C8                <1> 	mov	al, cl ; <- year BCD
  2139 0000AF11 240F                <1> 	and	al, 0Fh
  2140 0000AF13 88CC                <1> 	mov	ah, cl
  2141 0000AF15 C0EC04              <1> 	shr	ah, 4
  2142 0000AF18 D50A                <1> 	aad
  2143 0000AF1A 88C1                <1> 	mov	cl, al ; -> year
  2144                              <1> 
  2145                              <1> 	;mov	al, ch
  2146                              <1> 	;mov	ah, 100
  2147                              <1> 	;mul	ah
  2148                              <1> 	; 29/07/2022
  2149 0000AF1C B064                <1> 	mov	al, 100
  2150 0000AF1E F6E5                <1> 	mul	ch	
  2151                              <1> 
  2152                              <1> 	;xor	ch, ch
  2153                              <1> 	;add	ax, cx
  2154                              <1> 	; 29/07/2022
  2155 0000AF20 00C8                <1> 	add	al, cl
  2156 0000AF22 80D400              <1> 	adc	ah, 0
  2157 0000AF25 662DBC07            <1> 	sub	ax, 1980 ; ms-dos epoch
  2158                              <1> 	;mov	cx, ax
  2159                              <1> 	; 29/07/2022
  2160 0000AF29 88C1                <1> 	mov	cl, al
  2161                              <1> 	;mov	ecx, eax
  2162                              <1> 
  2163 0000AF2B 88F0                <1> 	mov	al, dh ; <- month in bcd
  2164 0000AF2D 240F                <1> 	and	al, 0Fh
  2165 0000AF2F 88F4                <1> 	mov	ah, dh
  2166 0000AF31 C0EC04              <1> 	shr	ah, 4
  2167 0000AF34 D50A                <1> 	aad
  2168 0000AF36 88C6                <1> 	mov	dh, al ; -> month
  2169                              <1> 
  2170 0000AF38 88D0                <1> 	mov	al, dl ; <- day BCD
  2171 0000AF3A 240F                <1> 	and	al, 0Fh
  2172 0000AF3C 88D4                <1> 	mov	ah, dl
  2173 0000AF3E C0EC04              <1> 	shr	ah, 4
  2174 0000AF41 D50A                <1> 	aad
  2175 0000AF43 88C2                <1> 	mov	dl, al ; -> day
  2176                              <1> 
  2177 0000AF45 88C8                <1> 	mov	al, cl ; count of years from 1980
  2178                              <1> 	;shl	ax, 4
  2179                              <1> 	; 29/07/2022
  2180                              <1> 	;mov	eax, ecx
  2181 0000AF47 C1E004              <1> 	shl	eax, 4
  2182                              <1> 
  2183 0000AF4A 08F0                <1> 	or	al, dh ; month of year, 1 to 12
  2184                              <1> 	;shl	ax, 5
  2185                              <1> 	; 29/07/2022
  2186 0000AF4C C1E005              <1> 	shl	eax, 5
  2187 0000AF4F 08D0                <1> 	or	al, dl ; day of year, 1 to 31
  2188                              <1> 	
  2189                              <1> 	;push	ax ; push date
  2190                              <1> 	; 29/07/2022
  2191 0000AF51 50                  <1> 	push	eax
  2192                              <1> 
  2193 0000AF52 B402                <1> 	mov	ah, 02h ; Return Current Time
  2194 0000AF54 E87CB2FFFF          <1> 	call	int1Ah
  2195                              <1> 
  2196 0000AF59 88E8                <1> 	mov	al, ch ; <- hours BCD
  2197 0000AF5B 240F                <1> 	and	al, 0Fh
  2198 0000AF5D 88EC                <1> 	mov	ah, ch
  2199 0000AF5F C0EC04              <1> 	shr	ah, 4
  2200 0000AF62 D50A                <1> 	aad
  2201 0000AF64 88C5                <1> 	mov	ch, al ; -> hours
  2202                              <1> 
  2203 0000AF66 88C8                <1> 	mov	al, cl ; <- minutes BCD
  2204 0000AF68 240F                <1> 	and	al, 0Fh
  2205 0000AF6A 88CC                <1> 	mov	ah, cl
  2206 0000AF6C C0EC04              <1> 	shr	ah, 4
  2207 0000AF6F D50A                <1> 	aad
  2208 0000AF71 88C1                <1> 	mov	cl, al ; -> minutes
  2209                              <1> 
  2210 0000AF73 88F0                <1> 	mov	al, dh ; <- seconds BCD
  2211 0000AF75 240F                <1> 	and	al, 0Fh
  2212 0000AF77 88F4                <1> 	mov	ah, dh
  2213 0000AF79 C0EC04              <1> 	shr	ah, 4
  2214 0000AF7C D50A                <1> 	aad
  2215 0000AF7E 88C6                <1> 	mov	dh, al ; -> seconds
  2216                              <1> 
  2217 0000AF80 88E8                <1> 	mov	al, ch ; hours
  2218                              <1> 	;shl	ax, 6
  2219                              <1> 	; 29/07/2022
  2220 0000AF82 C1E006              <1> 	shl	eax, 6
  2221 0000AF85 08C8                <1> 	or	al, cl ; minutes
  2222                              <1> 	;shl	ax, 5
  2223                              <1> 	; 29/07/2022
  2224 0000AF87 C1E005              <1> 	shl	eax, 5
  2225 0000AF8A D0EE                <1> 	shr	dh, 1 ; 2 seconds
  2226                              <1> 	; There is a bug in TRDOS v1 here !
  2227                              <1> 	; it was 'or al, dl' ! 
  2228 0000AF8C 08F0                <1> 	or	al, dh ; seconds
  2229                              <1> 
  2230                              <1> 	;pop	dx ; pop date
  2231                              <1> 	; 29/07/2022
  2232 0000AF8E 5A                  <1> 	pop	edx	
  2233                              <1> 
  2234 0000AF8F C3                  <1> 	retn
  2235                              <1> 
  2236                              <1> save_directory_buffer:
  2237                              <1> 	; 30/07/2022
  2238                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  2239                              <1> 	; 15/10/2016
  2240                              <1> 	; 23/03/2016
  2241                              <1> 	; 26/02/2016
  2242                              <1> 	; 22/02/2016 (TRDOS 386 = TRDOS v2.0)
  2243                              <1> 	; 01/08/2011
  2244                              <1> 	; 14/03/2010
  2245                              <1> 	; INPUT ->
  2246                              <1> 	; 	 none
  2247                              <1> 	; OUTPUT ->
  2248                              <1> 	;  cf = 0 -> write OK...
  2249                              <1> 	;  cf = 1 -> error code in AL (EAX)
  2250                              <1> 	;  cf = 1 & AL = 0Dh => CH & CL = FS & FAT type
  2251                              <1> 	;  EBX = Directory Buffer Address
  2252                              <1> 	;
  2253                              <1> 	;  (EAX, ECX, EDX will be modified)
  2254                              <1>  
  2255 0000AF90 BB00000800          <1> 	mov	ebx, Directory_Buffer
  2256 0000AF95 803D[317F0100]02    <1> 	cmp	byte [DirBuff_ValidData], 2
  2257 0000AF9C 7403                <1> 	je	short loc_save_dir_buffer
  2258 0000AF9E 31C0                <1> 	xor	eax, eax
  2259 0000AFA0 C3                  <1> 	retn            
  2260                              <1> 
  2261                              <1> loc_save_dir_buffer:
  2262 0000AFA1 56                  <1> 	push	esi
  2263 0000AFA2 31DB                <1> 	xor	ebx, ebx 
  2264 0000AFA4 8A3D[2F7F0100]      <1>         mov     bh, [DirBuff_DRV]
  2265 0000AFAA 80EF41              <1> 	sub	bh, 'A'
  2266 0000AFAD BE00010900          <1>         mov     esi, Logical_DOSDisks
  2267 0000AFB2 01DE                <1> 	add	esi, ebx
  2268 0000AFB4 668B4E03            <1>         mov     cx, [esi+LD_FATType]
  2269                              <1> 	; CH = FS Type (A1h for FS)
  2270                              <1> 	; CL = FAT Type (0 for FS)
  2271 0000AFB8 08C9                <1> 	or	cl, cl
  2272 0000AFBA 7431                <1> 	jz	short loc_save_dir_buff_stc_retn
  2273                              <1> 
  2274                              <1> loc_save_dir_buffer_check_cluster_no:    
  2275 0000AFBC A1[367F0100]        <1> 	mov	eax, [DirBuff_Cluster]
  2276 0000AFC1 28FF                <1> 	sub	bh, bh ; ebx = 0
  2277 0000AFC3 09C0                <1> 	or	eax, eax
  2278 0000AFC5 753E                <1> 	jnz	short loc_save_sub_dir_buffer
  2279 0000AFC7 8A25[307F0100]      <1> 	mov	ah, [DirBuff_FATType]
  2280 0000AFCD FEC3                <1> 	inc	bl ;  bl = 1
  2281 0000AFCF 38DC                <1> 	cmp	ah, bl
  2282 0000AFD1 721B                <1> 	jb	short loc_save_dir_buff_inv_data_retn
  2283 0000AFD3 FEC3                <1> 	inc	bl ; bl = 2
  2284 0000AFD5 38E3                <1> 	cmp	bl, ah
  2285 0000AFD7 7215                <1> 	jb	short loc_save_dir_buff_inv_data_retn
  2286                              <1> 
  2287                              <1> loc_save_root_dir_buffer:
  2288 0000AFD9 668B5E17            <1> 	mov	bx, [esi+LD_BPB+RootDirEnts]
  2289 0000AFDD 6683C30F            <1> 	add	bx, 15
  2290                              <1> 	;shr	bx, 4 ; 16 dir entries per sector
  2291                              <1> 	; 29/07/2022
  2292 0000AFE1 C1EB04              <1> 	shr	ebx, 4
  2293                              <1> 	;or	bx, bx
  2294 0000AFE4 09DB                <1> 	or	ebx, ebx
  2295 0000AFE6 7405                <1> 	jz	short loc_save_dir_buff_stc_retn
  2296                              <1> 	;mov	ecx, ebx 
  2297 0000AFE8 8B4664              <1> 	mov	eax, [esi+LD_ROOTBegin] ; 26/02/2016
  2298 0000AFEB EB22                <1> 	jmp	short loc_write_directory_to_disk
  2299                              <1> 
  2300                              <1> loc_save_dir_buff_stc_retn:
  2301 0000AFED F9                  <1> 	stc
  2302                              <1> loc_save_dir_buff_inv_data_retn:
  2303                              <1> 	; 15/10/2016 (0Dh -> 29)
  2304 0000AFEE B01D                <1> 	mov	al, 29 ; Invalid data !
  2305 0000AFF0 C605[317F0100]00    <1> 	mov	byte [DirBuff_ValidData], 0
  2306 0000AFF7 EB05                <1> 	jmp	short loc_save_dir_buff_retn 
  2307                              <1> 
  2308                              <1> loc_write_directory_to_disk_err:
  2309                              <1> 	; 15/10/2016 (disk write error code, 1Dh -> 18)
  2310 0000AFF9 B812000000          <1> 	mov	eax, 18 ; Drive not ready or write error 
  2311                              <1> 
  2312                              <1> loc_save_dir_buff_retn:
  2313 0000AFFE BB00000800          <1> 	mov	ebx, Directory_Buffer
  2314 0000B003 5E                  <1> 	pop	esi
  2315 0000B004 C3                  <1> 	retn
  2316                              <1>  
  2317                              <1> loc_save_sub_dir_buffer:
  2318                              <1> 	; ebx  = 0
  2319                              <1> 	;sub	eax, 2
  2320                              <1> 	; 30/07/2022
  2321 0000B005 48                  <1> 	dec	eax
  2322 0000B006 48                  <1> 	dec	eax
  2323 0000B007 8A5E13              <1> 	mov	bl, [esi+LD_BPB+SecPerClust]
  2324 0000B00A F7E3                <1> 	mul	ebx
  2325 0000B00C 034668              <1>         add     eax, [esi+LD_DATABegin]
  2326                              <1>  	;mov	ecx, ebx
  2327                              <1> 
  2328                              <1> loc_write_directory_to_disk:
  2329 0000B00F 89D9                <1>  	mov	ecx, ebx
  2330 0000B011 BB00000800          <1> 	mov	ebx, Directory_Buffer
  2331 0000B016 E87B6D0000          <1> 	call	disk_write
  2332 0000B01B 72DC                <1> 	jc	short loc_write_directory_to_disk_err
  2333                              <1> 
  2334                              <1> loc_save_dir_buff_validate_retn:
  2335 0000B01D C605[317F0100]01    <1> 	mov	byte [DirBuff_ValidData], 1
  2336 0000B024 31C0                <1> 	xor	eax, eax
  2337                              <1> 	; 26/02/2016
  2338 0000B026 EBD6                <1> 	jmp	short loc_save_dir_buff_retn
  2339                              <1> 
  2340                              <1> update_parent_dir_lmdt:
  2341                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  2342                              <1> 	; 29/12/2017
  2343                              <1> 	; 22/02/2016 (TRDOS 386 = TRDOS v2.0)
  2344                              <1> 	; 01/08/2011
  2345                              <1> 	; 16/10/2010 
  2346                              <1> 	; 
  2347                              <1> 	; INPUT -> 
  2348                              <1> 	;	none
  2349                              <1>  	; OUTPUT ->
  2350                              <1> 	;	(last modification date & time of the parent dir
  2351                              <1> 	;	will be changed/updated)
  2352                              <1> 	;
  2353                              <1> 	; (EAX, EBX, ECX, EDX, EDI will be changed)
  2354                              <1> 
  2355 0000B028 29C0                <1> 	sub	eax, eax
  2356 0000B02A 8A25[08780100]      <1> 	mov	ah, [Current_Dir_Level]
  2357 0000B030 A0[09780100]        <1> 	mov	al, [Current_FATType]
  2358 0000B035 3C01                <1> 	cmp	al, 1
  2359 0000B037 7239                <1> 	jb	short loc_UPDLMDT_proc_retn
  2360                              <1>     
  2361                              <1> loc_update_parent_dir_lm_date_time:
  2362 0000B039 08E4                <1> 	or	ah, ah
  2363 0000B03B 7435                <1> 	jz	short loc_UPDLMDT_proc_retn
  2364                              <1> 
  2365 0000B03D 56                  <1> 	push	esi ; *
  2366 0000B03E 8825[A8810100]      <1> 	mov	[UPDLMDT_CDirLevel], ah
  2367 0000B044 8B15[04780100]      <1> 	mov	edx, [Current_Dir_FCluster]
  2368 0000B04A 8915[A9810100]      <1> 	mov	[UPDLMDT_CDirFCluster], edx
  2369                              <1> 
  2370 0000B050 FECC                <1> 	dec	ah
  2371                              <1> 	;mov	ecx, 12
  2372                              <1>         ; 29/07/2022
  2373 0000B052 29C9                <1> 	sub	ecx, ecx
  2374 0000B054 B10C                <1> 	mov	cl, 12
  2375                              <1> 	;
  2376 0000B056 BE[687F0100]        <1> 	mov     esi, PATH_Array
  2377                              <1> 
  2378 0000B05B 8825[08780100]      <1> 	mov	[Current_Dir_Level], ah
  2379 0000B061 08E4                <1> 	or	ah, ah
  2380 0000B063 750E                <1> 	jnz	short loc_update_parent_dir_lmdt_load_sub_dir_1
  2381 0000B065 803D[09780100]02    <1> 	cmp	byte [Current_FATType], 2
  2382 0000B06C 770B                <1> 	ja	short loc_update_parent_dir_lmdt_load_sub_dir_2
  2383 0000B06E 28C0                <1> 	sub	al, al ; eax = 0
  2384 0000B070 EB0A                <1> 	jmp	short loc_update_parent_dir_lmdt_load_sub_dir_3
  2385                              <1> 
  2386                              <1> loc_UPDLMDT_proc_retn:
  2387 0000B072 C3                  <1> 	retn
  2388                              <1>          
  2389                              <1> loc_update_parent_dir_lmdt_load_sub_dir_1:
  2390 0000B073 B010                <1> 	mov	al, 16
  2391 0000B075 F6E4                <1> 	mul	ah 
  2392 0000B077 01C6                <1> 	add	esi, eax
  2393                              <1> 
  2394                              <1> loc_update_parent_dir_lmdt_load_sub_dir_2:  
  2395 0000B079 8B460C              <1> 	mov	eax, [esi+12] ; Parent Dir First Cluster
  2396                              <1> 
  2397                              <1> loc_update_parent_dir_lmdt_load_sub_dir_3:
  2398 0000B07C A3[04780100]        <1> 	mov	[Current_Dir_FCluster], eax
  2399                              <1> 
  2400 0000B081 83C610              <1> 	add	esi, 16
  2401 0000B084 66BF[8E80]          <1> 	mov	di, Dir_File_Name  
  2402 0000B088 F3A4                <1> 	rep	movsb
  2403                              <1> 	
  2404 0000B08A BE00010900          <1> 	mov	esi, Logical_DOSDisks
  2405 0000B08F 29DB                <1> 	sub	ebx, ebx
  2406 0000B091 8A3D[0A780100]      <1> 	mov	bh, [Current_Drv]
  2407 0000B097 01DE                <1> 	add	esi, ebx
  2408 0000B099 E8E2F7FFFF          <1> 	call	reload_current_directory
  2409 0000B09E 722F                <1> 	jc	short loc_update_parent_dir_lmdt_restore_cdirlevel
  2410                              <1> 
  2411                              <1> loc_update_parent_dir_lmdt_locate_dir: 
  2412 0000B0A0 BE[8E800100]        <1> 	mov	esi, Dir_File_Name        
  2413                              <1> 	;xor	cx, cx
  2414                              <1> 	; 29/07/2022
  2415 0000B0A5 31C9                <1> 	xor	ecx, ecx
  2416 0000B0A7 66B81008            <1> 	mov	ax, 0810h ; Only directories
  2417 0000B0AB E80BF7FFFF          <1>         call    locate_current_dir_file
  2418                              <1> 	; EDI = DirBuff Directory Entry Address
  2419 0000B0B0 721D                <1> 	jc	short loc_update_parent_dir_lmdt_restore_cdirlevel
  2420                              <1> 
  2421 0000B0B2 E844FEFFFF          <1> 	call	convert_current_date_time
  2422 0000B0B7 66895712            <1> 	mov	[edi+18], dx ; Last Access Date
  2423 0000B0BB 66895718            <1> 	mov	[edi+24], dx ; Last Write Date
  2424 0000B0BF 66894716            <1> 	mov	[edi+22], ax ; Last Write Time
  2425                              <1> 
  2426 0000B0C3 C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2
  2427 0000B0CA E8C1FEFFFF          <1> 	call	save_directory_buffer
  2428                              <1> 	; 29/12/2017
  2429                              <1> 	;jc	short loc_update_parent_dir_lmdt_restore_cdirlevel
  2430                              <1> 	;xor	al, al 
  2431                              <1> loc_update_parent_dir_lmdt_restore_cdirlevel:
  2432                              <1>  	;current directory level restoration
  2433 0000B0CF 8A25[A8810100]      <1> 	mov	ah, [UPDLMDT_CDirLevel]
  2434 0000B0D5 8825[08780100]      <1> 	mov	[Current_Dir_Level], ah
  2435 0000B0DB 8B15[A9810100]      <1>         mov     edx, [UPDLMDT_CDirFCluster]
  2436 0000B0E1 8915[04780100]      <1> 	mov	[Current_Dir_FCluster], edx
  2437                              <1> 
  2438 0000B0E7 5E                  <1> 	pop	esi ; *
  2439 0000B0E8 C3                  <1> 	retn
  2440                              <1> 
  2441                              <1> delete_longname:
  2442                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  2443                              <1> 	; 27/02/2016 (TRDOS 386 = TRDOS v2.0)
  2444                              <1> 	; 01/08/2011 (DIR.ASM, 'proc_delete_longname')
  2445                              <1> 	; 14/03/2010
  2446                              <1> 	; INPUT ->
  2447                              <1> 	; 	EAX = Directory Entry (Index) Number (< 65536)
  2448                              <1> 	; OUTPUT ->
  2449                              <1> 	;	cf = 0 -> OK  (EAX = 0)
  2450                              <1> 	; 	cf = 1 -> error code in EAX (AL)
  2451                              <1> 	;
  2452                              <1> 	; (Modified registers: EAX, EDX, ECX, EBX, EDI) 
  2453                              <1> 
  2454 0000B0E9 66A3[D8810100]      <1> 	mov	[DLN_EntryNumber], ax
  2455 0000B0EF C605[DA810100]40    <1>         mov     byte [DLN_40h], 40h
  2456                              <1> 
  2457 0000B0F6 E857000000          <1> 	call	locate_current_dir_entry
  2458 0000B0FB 7307                <1> 	jnc	short loc_dln_check_attributes
  2459 0000B0FD C3                  <1> 	retn
  2460                              <1> 
  2461                              <1> loc_dln_longname_not_found:
  2462                              <1> 	;mov	eax, 2
  2463                              <1> 	; 29/07/2022
  2464 0000B0FE 29C0                <1> 	sub	eax, eax
  2465 0000B100 B002                <1> 	mov	al, 2
  2466 0000B102 F9                  <1> 	stc
  2467 0000B103 C3                  <1> 	retn
  2468                              <1> 
  2469                              <1> loc_dln_check_attributes:
  2470 0000B104 B00F                <1> 	mov	al, 0Fh  ; long name
  2471 0000B106 8A670B              <1> 	mov	ah, [edi+0Bh] ; dir entry attributes
  2472 0000B109 38C4                <1> 	cmp	ah, al
  2473 0000B10B 75F1                <1> 	jne	short loc_dln_longname_not_found
  2474 0000B10D 8A27                <1> 	mov	ah, [edi]
  2475 0000B10F 2A25[DA810100]      <1> 	sub	ah, [DLN_40h]
  2476 0000B115 76E7                <1> 	jna	short loc_dln_longname_not_found         
  2477 0000B117 80FC14              <1> 	cmp	ah, 14h ; 84-64=20 -> 20*13=260 bytes
  2478 0000B11A 77E2                <1> 	ja	short loc_dln_longname_not_found
  2479                              <1>              
  2480 0000B11C C607E5              <1> 	mov	byte [edi], 0E5h  ; deleted sign
  2481 0000B11F C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2 ; changed/write sign
  2482 0000B126 C605[DA810100]00    <1> 	mov	byte [DLN_40h], 0 ; 40h -> 0
  2483                              <1> 	  
  2484                              <1> loc_dln_delete_next_ln_entry:
  2485 0000B12D 80FC01              <1> 	cmp	ah, 1
  2486 0000B130 7616                <1> 	jna	short loc_dln_longname_retn
  2487                              <1> loc_dln_delete_next_ln_entry_0:
  2488 0000B132 66FF05[D8810100]    <1> 	inc	word [DLN_EntryNumber]
  2489 0000B139 0FB705[D8810100]    <1> 	movzx	eax, word [DLN_EntryNumber] 
  2490 0000B140 E80D000000          <1> 	call	locate_current_dir_entry
  2491 0000B145 73BD                <1> 	jnc	short loc_dln_check_attributes
  2492                              <1> 
  2493                              <1> loc_dln_longname_stc_retn:
  2494 0000B147 C3                  <1> 	retn 
  2495                              <1> 	   
  2496                              <1> loc_dln_longname_retn:
  2497                              <1> 	;cmp	byte [DirBuff_ValidData], 2
  2498                              <1> 	;jne	short loc_dln_longname_retn_xor_eax
  2499 0000B148 E843FEFFFF          <1> 	call	save_directory_buffer
  2500 0000B14D 72F8                <1> 	jc	short loc_dln_longname_stc_retn
  2501                              <1> 
  2502                              <1> loc_dln_longname_retn_xor_eax:
  2503 0000B14F 31C0                <1> 	xor	eax, eax
  2504 0000B151 C3                  <1> 	retn
  2505                              <1> 
  2506                              <1> locate_current_dir_entry:
  2507                              <1> 	; 30/07/2022
  2508                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  2509                              <1> 	; 16/10/2016
  2510                              <1> 	; 15/10/2016
  2511                              <1> 	; 23/03/2016
  2512                              <1> 	; 27/02/2016 (TRDOS 386 = TRDOS v2.0)
  2513                              <1> 	; 01/08/2011 (DIR.ASM, 'proc_locate_current_dir_entry')
  2514                              <1> 	; 07/03/2010
  2515                              <1> 	; INPUT ->
  2516                              <1> 	;	EAX = Directory Entry (Index) Number (< 65536) 
  2517                              <1> 	; OUTPUT ->
  2518                              <1> 	;	EDI = Directory Entry Address
  2519                              <1> 	; 	EAX = Cluster Number of Directory Buffer
  2520                              <1> 	;	EBX = Directory Buffer Entry Offset
  2521                              <1> 	;	ECX = DirBuff Valid Data identifier (CL)
  2522                              <1> 	;   	If CF = 0 and CL = 2 then
  2523                              <1> 	;	   directory buffer modified and
  2524                              <1> 	;	   must be written to disk.
  2525                              <1> 	; 	If CF = 0  and CL = 1 then
  2526                              <1> 	;	   dir buffer has been written to disk, already.
  2527                              <1> 	;	CF = 1 -> Error code in EAX (AL)
  2528                              <1> 	;
  2529                              <1> 	; (Modified registers: EAX, EDX, ECX, EBX, EDI) 
  2530                              <1> 
  2531                              <1> loc_locate_current_dir_entry:
  2532 0000B152 56                  <1> 	push	esi
  2533 0000B153 89C1                <1> 	mov	ecx, eax
  2534                              <1> 	;mov	edx, 32
  2535                              <1> 	; 29/07/2022
  2536 0000B155 29D2                <1> 	sub	edx, edx
  2537 0000B157 B220                <1> 	mov	dl, 32
  2538 0000B159 F7E2                <1> 	mul	edx 
  2539 0000B15B A3[E4810100]        <1> 	mov	[LCDE_ByteOffset], eax
  2540 0000B160 31DB                <1> 	xor	ebx, ebx
  2541 0000B162 8A3D[0A780100]      <1> 	mov	bh, [Current_Drv]
  2542 0000B168 A0[2F7F0100]        <1>         mov     al, [DirBuff_DRV]
  2543 0000B16D 2C41                <1> 	sub	al, 'A'
  2544 0000B16F BE00010900          <1>         mov     esi, Logical_DOSDisks
  2545 0000B174 01DE                <1> 	add	esi, ebx
  2546 0000B176 38C7                <1> 	cmp	bh, al
  2547                              <1> 	;jne	loc_lcde_reload_current_directory
  2548                              <1> 	; 29/07/2022
  2549 0000B178 7405                <1> 	je	short loc_lcde_cdl_check
  2550 0000B17A E986000000          <1> 	jmp	loc_lcde_reload_current_directory
  2551                              <1> loc_lcde_cdl_check:
  2552                              <1> 	; 29/07/2022
  2553 0000B17F 31C0                <1> 	xor	eax, eax
  2554 0000B181 803D[08780100]00    <1> 	cmp	byte [Current_Dir_Level], 0
  2555 0000B188 7728                <1> 	ja	short loc_lcde_calc_dirbuff_cluster_offset
  2556                              <1> 	; 27/02/2016
  2557                              <1> 	; TRDOS v1 has bug here for FAT32 fs !
  2558                              <1> 	; (Root Directory Entries for FAT32 = 0)
  2559 0000B18A 807E0303            <1> 	cmp	byte [esi+LD_FATType], 3  ; FAT32
  2560 0000B18E 7322                <1> 	jnb	short loc_lcde_calc_dirbuff_cluster_offset
  2561                              <1> 
  2562                              <1> loc_lcde_cdl_check_FAT12_16:
  2563                              <1> 	; 29/07/2022
  2564                              <1> 	;xor	eax, eax
  2565 0000B190 668B4617            <1> 	mov	ax, [esi+LD_BPB+RootDirEnts]
  2566                              <1> 	;dec	ax
  2567 0000B194 48                  <1> 	dec	eax
  2568                              <1> 	;xor	dx, dx  
  2569                              <1> 	;cmp	ax, cx ; cx = Directory Entry (Index) Number
  2570                              <1> 	; 29/07/2022
  2571 0000B195 39C8                <1> 	cmp	eax, ecx
  2572 0000B197 720E                <1> 	jb	short loc_lcde_stc_12h_retn
  2573 0000B199 66890D[DC810100]    <1> 	mov	[LCDE_EntryIndex], cx
  2574 0000B1A0 31C0                <1> 	xor	eax, eax
  2575 0000B1A2 E985000000          <1>         jmp     loc_lcde_check_dir_buffer_cluster
  2576                              <1> 
  2577                              <1> loc_lcde_stc_12h_retn:
  2578 0000B1A7 5E                  <1> 	pop	esi
  2579 0000B1A8 89CB                <1> 	mov	ebx, ecx
  2580 0000B1AA 89D1                <1> 	mov	ecx, edx
  2581                              <1> 	; 16/10/2016 (12h -> 12)
  2582 0000B1AC B80C000000          <1> 	mov	eax, 12 ; No more files
  2583 0000B1B1 C3                  <1> 	retn 
  2584                              <1> 
  2585                              <1> loc_lcde_calc_dirbuff_cluster_offset:
  2586                              <1> 	;mov	bl, [esi+LD_BPB+SecPerClust]
  2587                              <1> 	;xor	bh, bh
  2588                              <1> 	;mov	ax, [esi+LD_BPB+BytesPerSec]
  2589                              <1> 	;mul	bx
  2590                              <1>  	;;or	dx, dx ; If bytes per cluster > 32KB it is invalid
  2591                              <1> 	;; 29/07/2022
  2592                              <1> 	;or	dl, dl
  2593                              <1> 	;jnz	short loc_lcde_invalid_format
  2594                              <1> 	; 29/07/2022
  2595 0000B1B2 31DB                <1> 	xor	ebx, ebx
  2596 0000B1B4 8A5E13              <1> 	mov	bl, [esi+LD_BPB+SecPerClust]
  2597 0000B1B7 668B4611            <1> 	mov	ax, [esi+LD_BPB+BytesPerSec]
  2598 0000B1BB F7E3                <1> 	mul	ebx
  2599 0000B1BD 89C1                <1> 	mov	ecx, eax
  2600                              <1> 	;mov	cx, ax ; BYTES PER CLUSTER
  2601 0000B1BF A1[E4810100]        <1> 	mov	eax, [LCDE_ByteOffset]
  2602                              <1> 	;sub	edx, edx
  2603 0000B1C4 F7F1                <1> 	div	ecx
  2604 0000B1C6 3DFFFF0000          <1> 	cmp	eax, 65535
  2605 0000B1CB 7746                <1> 	ja	short loc_lcde_invalid_format
  2606                              <1> 
  2607                              <1> 	; cluster sequence number of directory (< 65536)
  2608 0000B1CD 66A3[DE810100]      <1> 	mov	[LCDE_ClusterSN], ax 
  2609                              <1> 
  2610                              <1> 	;mov	ax, dx ; byte offset in cluster (directory buffer)
  2611                              <1> 	; 29/07/2022
  2612 0000B1D3 89D0                <1> 	mov	eax, edx
  2613                              <1> 	;mov	bx, 32	; 1 dir entry = 32 bytes
  2614 0000B1D5 B320                <1>         mov	bl, 32
  2615                              <1> 	;sub	dx, dx	; 0
  2616                              <1> 	;div	bx 
  2617 0000B1D7 29D2                <1> 	sub	edx, edx
  2618 0000B1D9 F7F3                <1> 	div	ebx
  2619 0000B1DB 66A3[DC810100]      <1> 	mov	[LCDE_EntryIndex], ax ; dir entry index/sequence number
  2620                              <1> 				      ; (in directory buffer/cluster)	  
  2621                              <1> loc_lcde_get_current_sub_dir_fcluster:
  2622 0000B1E1 A1[04780100]        <1> 	mov	eax, [Current_Dir_FCluster]
  2623                              <1> 
  2624                              <1> loc_lcde_get_next_cluster:
  2625 0000B1E6 66833D[DE810100]00  <1> 	cmp	word [LCDE_ClusterSN], 0
  2626 0000B1EE 763C                <1> 	jna	short loc_lcde_check_dir_buffer_cluster
  2627 0000B1F0 A3[E0810100]        <1> 	mov	[LCDE_Cluster], eax
  2628 0000B1F5 E80D100000          <1> 	call	get_next_cluster
  2629 0000B1FA 721E                <1> 	jc	short loc_lcde_check_gnc_error
  2630 0000B1FC 66FF0D[DE810100]    <1>   	dec	word [LCDE_ClusterSN]
  2631 0000B203 EBE1                <1> 	jmp	short loc_lcde_get_next_cluster
  2632                              <1> 
  2633                              <1> loc_lcde_reload_current_directory:
  2634 0000B205 51                  <1> 	push	ecx
  2635 0000B206 E875F6FFFF          <1> 	call	reload_current_directory
  2636 0000B20B 59                  <1> 	pop	ecx
  2637                              <1> 	;jnc	loc_lcde_cdl_check
  2638                              <1> 	;pop	esi
  2639                              <1> 	;retn
  2640                              <1> 	; 09/08/2022
  2641 0000B20C 727E                <1> 	jc	short loc_lcde_retn
  2642 0000B20E E96CFFFFFF          <1> 	jmp	loc_lcde_cdl_check
  2643                              <1> 
  2644                              <1> loc_lcde_invalid_format:
  2645                              <1> 	; 15/10/2016 (0Bh -> 28)
  2646                              <1> 	;mov	eax, 28 ; Invalid Format !
  2647                              <1> 	; 29/07/2022
  2648 0000B213 29C0                <1> 	sub	eax, eax
  2649 0000B215 B01C                <1> 	mov	al, 28
  2650                              <1> loc_lcde_drive_not_ready_read_err:
  2651 0000B217 F9                  <1> 	stc
  2652 0000B218 5E                  <1> 	pop	esi 
  2653 0000B219 C3                  <1> 	retn  
  2654                              <1> 
  2655                              <1> loc_lcde_check_gnc_error:
  2656 0000B21A 09C0                <1> 	or	eax, eax
  2657 0000B21C 75F9                <1> 	jnz	short loc_lcde_drive_not_ready_read_err
  2658 0000B21E 66FF0D[DE810100]    <1> 	dec	word [LCDE_ClusterSN]
  2659 0000B225 75EC                <1> 	jnz	short loc_lcde_invalid_format 
  2660 0000B227 A1[E0810100]        <1> 	mov	eax, [LCDE_Cluster]
  2661                              <1> 
  2662                              <1> loc_lcde_check_dir_buffer_cluster:
  2663 0000B22C 3B05[367F0100]      <1> 	cmp	eax, [DirBuff_Cluster]
  2664 0000B232 755A                <1> 	jne	short loc_lcde_load_dir_cluster
  2665 0000B234 803D[317F0100]00    <1> 	cmp	byte [DirBuff_ValidData], 0
  2666 0000B23B 7726                <1> 	ja	short lcde_check_dir_buffer_cluster_next
  2667 0000B23D 803D[08780100]00    <1> 	cmp	byte [Current_Dir_Level], 0    
  2668 0000B244 775D                <1> 	ja	short loc_lcde_load_dir_cluster_0
  2669                              <1> 	; 27/02/2016
  2670                              <1> 	; TRDOS v1 has bug here for FAT32 fs !
  2671 0000B246 807E0303            <1> 	cmp	byte [esi+LD_FATType], 3  ; FAT32
  2672 0000B24A 7357                <1> 	jnb	short loc_lcde_load_dir_cluster_0
  2673                              <1> 	;
  2674 0000B24C 0FB74E17            <1> 	movzx	ecx, word [esi+LD_BPB+RootDirEnts]
  2675 0000B250 6683C10F            <1> 	add	cx, 15 ; round up (16 entries per sector)
  2676                              <1> 	;shr	cx, 4 ; 1 sector contains 16 dir entries	
  2677                              <1> 	; 29/07/2022
  2678 0000B254 C1E904              <1> 	shr	ecx, 4
  2679 0000B257 8B4664              <1>         mov     eax, [esi+LD_ROOTBegin]
  2680 0000B25A EB52                <1> 	jmp	short loc_lcde_load_dir_cluster_1 
  2681                              <1> 
  2682                              <1> loc_lcde_validate_dirBuff:
  2683 0000B25C C605[317F0100]01    <1> 	mov	byte [DirBuff_ValidData], 1
  2684                              <1> 
  2685                              <1> lcde_check_dir_buffer_cluster_next:
  2686 0000B263 0FB71D[DC810100]    <1> 	movzx	ebx, word [LCDE_EntryIndex]
  2687 0000B26A 663B1D[347F0100]    <1> 	cmp	bx, [DirBuff_LastEntry]
  2688 0000B271 77A0                <1> 	ja	short loc_lcde_invalid_format 
  2689                              <1> 	;mov	eax, 32
  2690                              <1> 	; 29/07/2022
  2691 0000B273 31C0                <1> 	xor	eax, eax
  2692 0000B275 B020                <1> 	mov	al, 32
  2693 0000B277 F7E3                <1> 	mul	ebx
  2694                              <1> 	;or	edx, edx
  2695                              <1> 	;jnz	short loc_lcde_invalid_format
  2696                              <1> 
  2697 0000B279 BF00000800          <1> 	mov	edi, Directory_Buffer  
  2698 0000B27E 01C7                <1> 	add	edi, eax ; add entry offset to buffer address
  2699                              <1> 
  2700                              <1> loc_lcde_dir_buffer_last_check:
  2701 0000B280 A1[367F0100]        <1> 	mov	eax, [DirBuff_Cluster]
  2702 0000B285 0FB60D[317F0100]    <1> 	movzx	ecx, byte [DirBuff_ValidData]
  2703                              <1> 
  2704                              <1> loc_lcde_retn:
  2705 0000B28C 5E                  <1> 	pop	esi
  2706 0000B28D C3                  <1> 	retn
  2707                              <1> 
  2708                              <1> loc_lcde_load_dir_cluster:
  2709                              <1> 	;cmp	byte [DirBuff_ValidData], 2
  2710                              <1> 	;jne	short loc_lcde_load_dir_cluster_n2
  2711 0000B28E 50                  <1> 	push	eax
  2712 0000B28F E8FCFCFFFF          <1> 	call	save_directory_buffer
  2713 0000B294 58                  <1> 	pop	eax
  2714 0000B295 72F5                <1> 	jc	short loc_lcde_retn
  2715                              <1> 
  2716                              <1> loc_lcde_load_dir_cluster_n2:
  2717 0000B297 C605[317F0100]00    <1> 	mov	byte [DirBuff_ValidData], 0
  2718 0000B29E A3[367F0100]        <1> 	mov	[DirBuff_Cluster], eax
  2719                              <1> 
  2720                              <1> loc_lcde_load_dir_cluster_0:
  2721                              <1> 	;sub	eax, 2
  2722                              <1> 	; 30/07/2022
  2723 0000B2A3 48                  <1> 	dec	eax
  2724 0000B2A4 48                  <1> 	dec	eax
  2725 0000B2A5 0FB64E13            <1> 	movzx	ecx, byte [esi+LD_BPB+SecPerClust]
  2726 0000B2A9 F7E1                <1> 	mul	ecx
  2727 0000B2AB 034668              <1>         add     eax, [esi+LD_DATABegin]
  2728                              <1> 
  2729                              <1> loc_lcde_load_dir_cluster_1:
  2730 0000B2AE BB00000800          <1> 	mov	ebx, Directory_Buffer
  2731                              <1> 	; ecx = sector count
  2732 0000B2B3 E8ED6A0000          <1> 	call	disk_read
  2733 0000B2B8 73A2                <1> 	jnc	short loc_lcde_validate_dirBuff
  2734                              <1> 
  2735                              <1> 	; 15/10/2016 
  2736                              <1> 	; (Disk read error instead of drv not ready err)
  2737 0000B2BA B811000000          <1> 	mov	eax, 17 ; Drive not ready or read error !
  2738 0000B2BF EBCB                <1> 	jmp	short loc_lcde_retn
  2739                              <1> 
  2740                              <1> 
  2741                              <1> remove_file:
  2742                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  2743                              <1> 	; 15/10/2016
  2744                              <1> 	; 28/02/2016 (TRDOS 386 = TRDOS v2.0)
  2745                              <1> 	; 10/04/2011 (FILE.ASM, 'proc_delete_file')
  2746                              <1> 	; 09/08/2010
  2747                              <1> 	; INPUT ->
  2748                              <1> 	;	EDI = Directory Buffer Entry Address
  2749                              <1> 	;	 CX = Directory Buffer Entry Counter/Index
  2750                              <1> 	;	 BL = Longname Entry Length
  2751                              <1> 	;	 BH = Logical DOS Drive Number 
  2752                              <1> 
  2753 0000B2C1 29C0                <1> 	sub	eax, eax
  2754 0000B2C3 88FC                <1> 	mov	ah, bh
  2755 0000B2C5 BE00010900          <1> 	mov	esi, Logical_DOSDisks
  2756 0000B2CA 01C6                <1> 	add	esi, eax
  2757                              <1> 
  2758 0000B2CC 807E0301            <1> 	cmp	byte [esi+LD_FATType], 1
  2759 0000B2D0 7311                <1> 	jnb	short loc_del_fat_file 
  2760                              <1>               
  2761 0000B2D2 807E04A1            <1> 	cmp	byte [esi+LD_FSType], 0A1h
  2762 0000B2D6 7406                <1> 	je	short loc_del_fs_file
  2763                              <1> 
  2764                              <1> loc_del_file_invalid_format:
  2765 0000B2D8 30E4                <1> 	xor	ah, ah
  2766                              <1> 	; 15/10/2016 (0Bh -> 28)
  2767 0000B2DA B01C                <1> 	mov	al, 28  ; Invalid Format
  2768 0000B2DC F9                  <1> 	stc 
  2769 0000B2DD C3                  <1> 	retn
  2770                              <1> 
  2771                              <1> loc_del_fs_file:
  2772                              <1> 	;call	delete_fs_file
  2773                              <1> 	;retn
  2774                              <1> 	; 29/07/2022
  2775 0000B2DE E9230F0000          <1> 	jmp	delete_fs_file	
  2776                              <1> 
  2777                              <1> loc_del_fat_file:
  2778 0000B2E3 E808000000          <1> 	call	delete_directory_entry
  2779 0000B2E8 7205                <1> 	jc	short loc_del_file_err_retn 
  2780                              <1> 
  2781                              <1> loc_delfile_unlink_cluster_chain:
  2782 0000B2EA E8C8160000          <1> 	call	truncate_cluster_chain
  2783                              <1> 	;jc	short loc_del_file_err_retn
  2784                              <1> 
  2785                              <1> loc_delfile_return:
  2786                              <1> loc_del_file_err_retn:
  2787 0000B2EF C3                  <1> 	retn
  2788                              <1> 
  2789                              <1> delete_directory_entry:
  2790                              <1> 	; 15/10/2016
  2791                              <1> 	; 28/02/2016 (TRDOS 386 = TRDOS v2.0)
  2792                              <1> 	; 01/08/2011 (DIR.ASM, 'proc_delete_directory_entry')
  2793                              <1> 	; 10/04/2011 
  2794                              <1> 	; INPUT ->
  2795                              <1> 	; 	ESI = Logical Dos Drive Descripton Table Address 
  2796                              <1> 	;	EDI = Directory Buffer Entry Address
  2797                              <1> 	;	 CX = Directory Buffer Entry Counter/Index
  2798                              <1> 	;	 BL = Longname Entry Length
  2799                              <1> 	; OUTPUT ->
  2800                              <1> 	; 	ESI = Logical dos drive descripton table address 
  2801                              <1> 	;	EAX = First cluster to be truncated/unlinked
  2802                              <1> 	;       CF = 1 -> Error code in EAX (AL)
  2803                              <1> 	;       CF = 0 & BH <> 0 -> LMDT write error  (BH = 1)
  2804                              <1> 	;       CF = 0 & BL <> 0 -> Long name delete error (BL = FFh) 
  2805                              <1> 	;
  2806                              <1> 	;  (EDI, EBX, ECX register contents will be changed)
  2807                              <1> 
  2808 0000B2F0 881D[72810100]      <1> 	mov	[DelFile_LNEL], bl
  2809 0000B2F6 66890D[70810100]    <1> 	mov	[DelFile_EntryCounter], cx
  2810                              <1> 
  2811 0000B2FD 668B4714            <1> 	mov	ax, [edi+20] ; First Cluster High Word
  2812 0000B301 C1E010              <1> 	shl	eax, 16
  2813 0000B304 668B471A            <1> 	mov	ax, [edi+26] ; First Cluster Low Word
  2814                              <1> 
  2815 0000B308 A3[6C810100]        <1> 	mov	[DelFile_FCluster], eax
  2816                              <1> 
  2817                              <1> loc_del_short_name:
  2818 0000B30D C607E5              <1> 	mov	byte [edi], 0E5h  ; Deleted sign
  2819                              <1> 
  2820 0000B310 C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2
  2821 0000B317 E874FCFFFF          <1> 	call	save_directory_buffer
  2822 0000B31C 723D                <1> 	jc	short loc_delete_direntry_err_return
  2823                              <1>  
  2824                              <1> loc_del_long_name:
  2825 0000B31E 0FB615[72810100]    <1> 	movzx	edx, byte [DelFile_LNEL]
  2826 0000B325 08D2                <1> 	or	dl, dl
  2827 0000B327 7416                <1> 	jz	short loc_del_dir_entry_update_parent_dir_lm_date
  2828                              <1> 
  2829 0000B329 8835[72810100]      <1> 	mov	[DelFile_LNEL], dh ; 0              
  2830                              <1>   
  2831 0000B32F 0FB705[70810100]    <1> 	movzx	eax, word [DelFile_EntryCounter]
  2832 0000B336 29D0                <1> 	sub	eax, edx
  2833                              <1> 	;jnc	short loc_del_long_name_continue
  2834 0000B338 7205                <1> 	jc	short loc_del_dir_entry_update_parent_dir_lm_date   
  2835                              <1> 
  2836                              <1> ;loc_del_direntry_inv_data_return: ; 15/10/2016 (0Dh -> 29)
  2837                              <1> ;	mov	eax, 29 ; 0Dh (TRDOS 8086) ; Invalid data
  2838                              <1> ;	retn
  2839                              <1> 
  2840                              <1> loc_del_long_name_continue: 
  2841                              <1> 	; AX = Directory Entry Number of the long name last entry
  2842 0000B33A E8AAFDFFFF          <1> 	call	delete_longname
  2843                              <1> 	;jc	short loc_delete_direntry_err_return
  2844                              <1> 
  2845                              <1> loc_del_dir_entry_update_parent_dir_lm_date:
  2846 0000B33F 801D[72810100]00    <1> 	sbb	byte [DelFile_LNEL], 0 ; 0FFh if cf = 1
  2847                              <1> 
  2848 0000B346 E8DDFCFFFF          <1> 	call	update_parent_dir_lmdt
  2849 0000B34B B700                <1> 	mov	bh, 0
  2850 0000B34D 80D700              <1> 	adc	bh, 0
  2851                              <1> 
  2852 0000B350 8A1D[72810100]      <1> 	mov	bl, byte [DelFile_LNEL]
  2853                              <1>  
  2854                              <1> loc_delete_direntry_return:
  2855 0000B356 A1[6C810100]        <1> 	mov	eax, [DelFile_FCluster]
  2856                              <1> loc_delete_direntry_err_return:
  2857 0000B35B C3                  <1> 	retn
  2858                              <1> 
  2859                              <1> rename_directory_entry:
  2860                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  2861                              <1> 	; 13/11/2017
  2862                              <1> 	; 15/10/2016
  2863                              <1> 	; 06/03/2016 (TRDOS 386 = TRDOS v2.0)
  2864                              <1> 	; 01/08/2011 (DIR.ASM, 'proc_rename_directory_entry')
  2865                              <1> 	; 19/11/2010
  2866                              <1> 	; INPUT -> (Current Directory)
  2867                              <1> 	;	CX = Directory Entry Number
  2868                              <1> 	;      EAX = First Cluster number of file or directory
  2869                              <1> 	;      EBX = Longname Length (dir entry count) (< 256)
  2870                              <1> 	;      ESI = New file (or directory) name (no path).
  2871                              <1> 	;           (ASCIIZ string)  
  2872                              <1> 	; OUTPUT -> 
  2873                              <1> 	;      CF = 0 -> successfull
  2874                              <1> 	;      CF = 1 -> error code in EAX (AL)
  2875                              <1> 	;
  2876                              <1> 	; (EAX, EBX, ECX, EDX, ESI, EDI will be changed)
  2877                              <1> 
  2878 0000B35C 803D[09780100]00    <1> 	cmp	byte [Current_FATType], 0
  2879 0000B363 7705                <1> 	ja	short loc_rename_directory_entry
  2880                              <1> 
  2881                              <1> 	;call	rename_fs_file_or_directory
  2882                              <1> 	;retn
  2883                              <1> 	; 29/07/2022
  2884 0000B365 E99C0E0000          <1>  	jmp	rename_fs_file_or_directory	
  2885                              <1> 	
  2886                              <1> loc_rename_directory_entry:
  2887 0000B36A 881D[72810100]      <1> 	mov	[DelFile_LNEL], bl
  2888 0000B370 66890D[70810100]    <1> 	mov	[DelFile_EntryCounter], cx
  2889 0000B377 A3[6C810100]        <1> 	mov	[DelFile_FCluster], eax
  2890                              <1> 
  2891 0000B37C 0FB7C1              <1> 	movzx	eax, cx
  2892 0000B37F E8CEFDFFFF          <1> 	call	locate_current_dir_entry
  2893 0000B384 7307                <1> 	jnc	short loc_rename_direntry_check_fcluster
  2894                              <1> 
  2895                              <1> loc_rename_direntry_pop_retn:
  2896 0000B386 C3                  <1> 	retn
  2897                              <1> 
  2898                              <1> loc_rename_direntry_pop_invd_retn:
  2899                              <1> 	; 29/07/2022
  2900                              <1> 	;stc
  2901                              <1> loc_rename_direntry_invd_retn:
  2902                              <1> 	; 15/10/2016 (0Dh -> 29)
  2903                              <1> 	;mov	eax, 29 ; Invalid data
  2904                              <1> 	; 29/07/2022
  2905 0000B387 29C0                <1> 	sub	eax, eax
  2906 0000B389 B01D                <1> 	mov	al, 29
  2907 0000B38B F9                  <1> 	stc
  2908                              <1> loc_rename_retn:
  2909 0000B38C C3                  <1> 	retn 
  2910                              <1> 
  2911                              <1> loc_rename_direntry_check_fcluster:
  2912 0000B38D 668B5714            <1> 	mov	dx, [edi+20] ; First Cluster HW
  2913 0000B391 C1E210              <1> 	shl	edx, 16 ; 13/11/2017
  2914 0000B394 668B571A            <1> 	mov	dx, [edi+26] ; First Cluster LW
  2915 0000B398 3B15[6C810100]      <1> 	cmp	edx, [DelFile_FCluster]
  2916 0000B39E 75E7                <1> 	jne	short loc_rename_direntry_pop_invd_retn
  2917                              <1> 	; ESI = New file (or directory) name. (ASCIIZ string)
  2918                              <1> 	; 06/03/2016
  2919                              <1> 	; TRDOS v2 - NOTE: 'convert_file_name' procedure
  2920                              <1> 	; has been modified for eliminating following situation.
  2921                              <1> 	; 
  2922                              <1> 	; TRDOS v1 - NOTE: If file/dir name is more than 11 bytes
  2923                              <1> 	; without a dot, attributes (edi+11) byte will be overwritten !
  2924                              <1> 	; (Dot file name input must be proper for 11 byte dir entry
  2925                              <1> 	;  type file name output.) 
  2926 0000B3A0 E8E5F6FFFF          <1> 	call	convert_file_name
  2927                              <1> 
  2928 0000B3A5 C605[317F0100]02    <1>         mov     byte [DirBuff_ValidData], 2
  2929 0000B3AC E8DFFBFFFF          <1> 	call	save_directory_buffer
  2930 0000B3B1 72D9                <1> 	jc	short loc_rename_retn
  2931                              <1> 
  2932                              <1> loc_rename_direntry_del_ln:
  2933 0000B3B3 0FB615[72810100]    <1> 	movzx	edx, byte [DelFile_LNEL]
  2934 0000B3BA 08D2                <1> 	or	dl, dl
  2935 0000B3BC 7410                <1> 	jz	short loc_rename_direntry_update_parent_dir_lm_date
  2936                              <1> 
  2937 0000B3BE 0FB705[70810100]    <1> 	movzx	eax, word [DelFile_EntryCounter]
  2938 0000B3C5 29D0                <1> 	sub	eax, edx
  2939 0000B3C7 72BE                <1> 	jc	short loc_rename_direntry_invd_retn
  2940                              <1> 
  2941                              <1> loc_rename_direntry_del_ln_continue: 
  2942                              <1> 	; EAX = Directory Entry Number of the long name last entry
  2943 0000B3C9 E81BFDFFFF          <1> 	call	delete_longname
  2944                              <1> 
  2945                              <1> loc_rename_direntry_update_parent_dir_lm_date:
  2946 0000B3CE E855FCFFFF          <1> 	call	update_parent_dir_lmdt
  2947 0000B3D3 31C0                <1> 	xor	eax, eax 
  2948 0000B3D5 C3                  <1> 	retn
  2949                              <1> 
  2950                              <1> move_source_file_to_destination_file:
  2951                              <1> 	; 07/08/2022
  2952                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  2953                              <1> 	; 15/10/2016
  2954                              <1> 	; 11/03/2016
  2955                              <1> 	; 10/03/2016 (TRDOS 386 = TRDOS v2.0)
  2956                              <1> 	; 01/08/2011 (FILE.ASM)
  2957                              <1> 	; 04/08/2010
  2958                              <1> 	;
  2959                              <1> 	;   Phase 1 -> Check destination file, 
  2960                              <1> 	;              'not found' is required
  2961                              <1> 	;   Phase 2 -> Check source file
  2962                              <1> 	;              'found' and proper attributes is required
  2963                              <1> 	;   Phase 3 -> Make destination directory entry,
  2964                              <1> 	;           add new dir cluster or section if it is required
  2965                              <1> 	;   Phase 4 -> Delete source directory entry.
  2966                              <1> 	;       cf = 1 causes to return before the phase 4.
  2967                              <1> 	;    (source file protection against any possible errors)    
  2968                              <1> 	;
  2969                              <1> 	; 08/05/2011 major modification
  2970                              <1> 	;            -> destination file deleting is removed   
  2971                              <1> 	;            for msdos move/rename compatibility.
  2972                              <1> 	;            (Access denied error will return if
  2973                              <1> 	;            the destination file is found...)
  2974                              <1> 	; INPUT ->
  2975                              <1> 	;	 ESI = Source File Pathname (Asciiz)
  2976                              <1> 	;        EDI = Destination File Pathname (Asciiz)
  2977                              <1> 	;        AL = 0 --> Interrupt (System call)
  2978                              <1> 	;        AL > 0 --> Command Interpreter (Question)
  2979                              <1> 	;        AL = 1 --> Question Phase
  2980                              <1> 	;        AL = 2 --> Progress Phase        
  2981                              <1> 	; OUTPUT -> 
  2982                              <1> 	;	 cf = 0 -> OK
  2983                              <1> 	;        EAX = Destination directory first cluster
  2984                              <1> 	;        ESI = Logical DOS drive description table 
  2985                              <1> 	;        EBX = Destination file structure offset
  2986                              <1> 	;        CX = 0 (CX > 0 --> calculate free space error)
  2987                              <1> 	;        cf = 1 -> Error code in EAX (AL) 
  2988                              <1> 	;
  2989                              <1> 	;  (EDX, ECX, EBX, ESI, EDI will be changed)
  2990                              <1> 
  2991 0000B3D6 3C02                <1> 	cmp	al, 2
  2992                              <1> 	;je	msftdf_df2_check_directory
  2993                              <1> 	; 29/07/2022
  2994 0000B3D8 7505                <1> 	jne	short msftdf
  2995 0000B3DA E97B010000          <1> 	jmp	msftdf_df2_check_directory
  2996                              <1> msftdf:
  2997 0000B3DF A2[F2820100]        <1> 	mov	[move_cmd_phase], al
  2998                              <1> 
  2999                              <1> msftdf_parse_sf_path:
  3000                              <1> 	; ESI = ASCIIZ pathname (Source)
  3001 0000B3E4 57                  <1> 	push	edi 
  3002 0000B3E5 BF[F0810100]        <1> 	mov	edi, SourceFile_Drv
  3003 0000B3EA E865F7FFFF          <1> 	call	parse_path_name
  3004 0000B3EF 5E                  <1> 	pop	esi
  3005 0000B3F0 7211                <1> 	jc	short msftdf_psf_retn
  3006                              <1> 
  3007                              <1> msftdf_parse_df_path:
  3008                              <1> 	; ESI = ASCIIZ pathname	(Destination)
  3009 0000B3F2 BF[70820100]        <1> 	mov	edi, DestinationFile_Drv
  3010 0000B3F7 E858F7FFFF          <1> 	call	parse_path_name
  3011 0000B3FC 7306                <1> 	jnc	short msftdf_check_sf_drv
  3012                              <1> 
  3013 0000B3FE 3C01                <1> 	cmp	al, 1 ; File or directory name is not existing
  3014 0000B400 7602                <1> 	jna	short msftdf_check_sf_drv
  3015                              <1> 
  3016                              <1> msftdf_stc_retn:
  3017 0000B402 F9                  <1> 	stc
  3018                              <1> msftdf_psf_retn:
  3019 0000B403 C3                  <1> 	retn 
  3020                              <1> 
  3021                              <1> msftdf_check_sf_drv:
  3022 0000B404 A0[F0810100]        <1> 	mov	al, [SourceFile_Drv]
  3023                              <1> 
  3024                              <1> msftdf_check_df_drv:
  3025 0000B409 8A15[70820100]      <1> 	mov	dl, [DestinationFile_Drv]
  3026                              <1> 
  3027                              <1> msftdf_compare_sf_df_drv:
  3028 0000B40F 29DB                <1> 	sub	ebx, ebx
  3029 0000B411 8A3D[0A780100]      <1> 	mov	bh, [Current_Drv]
  3030 0000B417 38C2                <1> 	cmp	dl, al
  3031 0000B419 7408                <1> 	je	short msftdf_check_sf_df_drv_ok
  3032                              <1> 
  3033                              <1> msftdf_not_same_drv:
  3034                              <1>         ; DL = source file's drive number
  3035 0000B41B 88C6                <1> 	mov	dh, al ; destination file's drive number
  3036                              <1> 	; 15/10/2016 (11h -> 21)
  3037                              <1> 	;mov	eax, 21 ; Not the same drive
  3038                              <1> 	; 29/07/2022
  3039 0000B41D 29C0                <1> 	sub	eax, eax
  3040 0000B41F B015                <1> 	mov	al, 21
  3041 0000B421 F9                  <1> 	stc
  3042 0000B422 C3                  <1> 	retn 
  3043                              <1> 
  3044                              <1> msftdf_check_sf_df_drv_ok:
  3045 0000B423 8815[F3820100]      <1> 	mov	[msftdf_sf_df_drv], dl
  3046                              <1> 
  3047 0000B429 29C0                <1>         sub	eax, eax
  3048 0000B42B 88D4                <1> 	mov	ah, dl
  3049 0000B42D 0500010900          <1> 	add	eax, Logical_DOSDisks
  3050 0000B432 A3[F4820100]        <1> 	mov	[msftdf_drv_offset], eax
  3051                              <1> 
  3052 0000B437 38FA                <1> 	cmp	dl, bh ; byte [Current_Drv]
  3053 0000B439 7407                <1> 	je	short msftdf_df_check_directory
  3054                              <1> 
  3055                              <1> msftdf_change_drv:
  3056 0000B43B E8A2C3FFFF          <1> 	call 	change_current_drive
  3057 0000B440 726D                <1> 	jc	short msftdf_df_error_retn
  3058                              <1> 	  
  3059                              <1> msftdf_check_destination_file:
  3060                              <1> msftdf_df_check_directory:
  3061 0000B442 BE[71820100]        <1> 	mov	esi, DestinationFile_Directory
  3062 0000B447 803E20              <1> 	cmp	byte [esi], 20h
  3063 0000B44A 760F                <1> 	jna	short msftdf_df_find_1
  3064                              <1> 
  3065                              <1> msftdf_df_change_directory:
  3066 0000B44C FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  3067 0000B452 30E4                <1> 	xor	ah, ah ; CD_COMMAND sign -> 0 
  3068 0000B454 E80FF1FFFF          <1> 	call	change_current_directory
  3069 0000B459 7254                <1> 	jc	short msftdf_df_error_retn
  3070                              <1> 
  3071                              <1> ;msftdf_df_change_prompt_dir_string:
  3072                              <1> ;	call 	change_prompt_dir_string
  3073                              <1> 
  3074                              <1> msftdf_df_find_1:
  3075 0000B45B BE[B2820100]        <1>         mov     esi, DestinationFile_Name
  3076 0000B460 803E20              <1> 	cmp	byte [esi], 20h
  3077 0000B463 7632                <1> 	jna	short msftdf_df_copy_sf_name
  3078                              <1> 
  3079                              <1> msftdf_df_find_2:
  3080 0000B465 6631C0              <1> 	xor	ax, ax ; DestinationFile_AttributesMask -> any/zero
  3081 0000B468 E823D6FFFF          <1> 	call	find_first_file
  3082                              <1> 	;jnc	msftdf_permission_denied_retn
  3083                              <1> 	; 29/07/2022
  3084 0000B46D 7205                <1> 	jc	short msftdf_df_check_error_code
  3085 0000B46F E98B000000          <1> 	jmp	msftdf_permission_denied_retn 
  3086                              <1> 
  3087                              <1> msftdf_df_check_error_code:
  3088                              <1> 	;cmp	eax, 2 ; File not found error
  3089 0000B474 3C02                <1> 	cmp	al, 2
  3090 0000B476 7536                <1> 	jne	short msftdf_df_stc_retn
  3091                              <1>               
  3092                              <1> msftdf_df_check_fname:
  3093                              <1> 	; 15/10/2016
  3094 0000B478 BE[B2820100]        <1> 	mov	esi, DestinationFile_Name ; *
  3095 0000B47D E8B3D9FFFF          <1> 	call	check_filename
  3096 0000B482 7307                <1> 	jnc	short msftdf_convert_df_direntry_name
  3097                              <1> 	; invalid file name chars !
  3098 0000B484 B81A000000          <1> 	mov	eax, ERR_INV_FILE_NAME  ; 26
  3099 0000B489 EB23                <1> 	jmp	short msftdf_df_stc_retn
  3100                              <1> 
  3101                              <1> msftdf_convert_df_direntry_name:
  3102                              <1> 	; mov	esi, DestinationFile_Name ; *
  3103 0000B48B BF[C2820100]        <1> 	mov	edi, DestinationFile_DirEntry
  3104 0000B490 E8F5F5FFFF          <1> 	call	convert_file_name
  3105 0000B495 EB19                <1>   	jmp	short msftdf_restore_current_dir_1
  3106                              <1> 
  3107                              <1> msftdf_df_copy_sf_name:
  3108 0000B497 89F7                <1> 	mov	edi, esi
  3109 0000B499 57                  <1> 	push	edi 
  3110 0000B49A BE[32820100]        <1>         mov     esi, SourceFile_Name
  3111                              <1> 	;mov	ecx, 12
  3112                              <1> 	; 29/07/2022
  3113 0000B49F 29C9                <1> 	sub	ecx, ecx
  3114 0000B4A1 B10C                <1> 	mov	cl, 12
  3115                              <1> msftdf_df_copy_sf_name_loop:
  3116 0000B4A3 AC                  <1> 	lodsb
  3117 0000B4A4 AA                  <1>         stosb
  3118 0000B4A5 08C0                <1> 	or	al, al
  3119 0000B4A7 7402                <1> 	jz	short msftdf_df_copy_sf_name_ok	
  3120 0000B4A9 E2F8                <1>         loop    msftdf_df_copy_sf_name_loop
  3121                              <1> msftdf_df_copy_sf_name_ok:	
  3122 0000B4AB 5E                  <1> 	pop	esi  
  3123 0000B4AC EBB7                <1> 	jmp	short msftdf_df_find_2
  3124                              <1> 
  3125                              <1> msftdf_df_stc_retn:
  3126 0000B4AE F9                  <1> 	stc
  3127                              <1> msftdf_restore_cdir_failed:
  3128                              <1> msftdf_df_error_retn:
  3129 0000B4AF C3                  <1> 	retn
  3130                              <1> 
  3131                              <1> msftdf_restore_current_dir_1:
  3132 0000B4B0 803D[BF2F0100]00    <1> 	cmp	byte [Restore_CDIR], 0
  3133 0000B4B7 760D                <1> 	jna	short msftdf_sf_check_directory
  3134 0000B4B9 8B35[F4820100]      <1> 	mov	esi, [msftdf_drv_offset] 
  3135 0000B4BF E8D4C3FFFF          <1> 	call	restore_current_directory
  3136 0000B4C4 72E9                <1> 	jc	short msftdf_restore_cdir_failed
  3137                              <1> 
  3138                              <1> msftdf_sf_check_directory:
  3139 0000B4C6 BE[F1810100]        <1> 	mov	esi, SourceFile_Directory
  3140 0000B4CB 803E20              <1> 	cmp	byte [esi], 20h
  3141 0000B4CE 760F                <1> 	jna	short msftdf_sf_find
  3142                              <1> msftdf_sf_change_directory:
  3143 0000B4D0 FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  3144 0000B4D6 30E4                <1> 	xor	ah, ah ; CD_COMMAND sign -> 0 
  3145 0000B4D8 E88BF0FFFF          <1> 	call	change_current_directory
  3146 0000B4DD 7225                <1> 	jc	short msftdf_return
  3147                              <1> 
  3148                              <1> ;msftdf_sf_change_prompt_dir_string:
  3149                              <1> ;	call	change_prompt_dir_string
  3150                              <1> 
  3151                              <1> msftdf_sf_find:
  3152 0000B4DF BE[32820100]        <1>         mov     esi, SourceFile_Name  ; Offset 66
  3153 0000B4E4 66B80018            <1> 	mov	ax, 1800h ; Only files
  3154 0000B4E8 E8A3D5FFFF          <1> 	call	find_first_file
  3155 0000B4ED 7215                <1> 	jc	short msftdf_return
  3156                              <1> 
  3157                              <1> msftdf_sf_ambgfn_check:
  3158 0000B4EF 6609D2              <1> 	or	dx, dx ; Ambiguous filename chars used sign (DX>0)
  3159 0000B4F2 7406                <1> 	jz	short msftdf_sf_found
  3160                              <1> 
  3161                              <1> msftdf_ambiguous_file_name_error:
  3162                              <1> 	;mov	eax, 2 ; File not found error
  3163                              <1> 	; 29/07/2022
  3164 0000B4F4 29C0                <1> 	sub	eax, eax
  3165 0000B4F6 B002                <1> 	mov	al, 2
  3166 0000B4F8 F9                  <1> 	stc
  3167 0000B4F9 C3                  <1> 	retn
  3168                              <1> 
  3169                              <1> msftdf_sf_found:
  3170 0000B4FA 80E31F              <1> 	and	bl, 1Fh ; Attributes, D-V-S-H-R
  3171 0000B4FD 7415                <1> 	jz	short msftdf_save_sf_structure
  3172                              <1> 
  3173                              <1> msftdf_permission_denied_retn:
  3174                              <1> 	;mov	eax, 05h ; Access (Permission) denied !
  3175                              <1> 	; 29/07/2022
  3176 0000B4FF 29C0                <1> 	sub	eax, eax
  3177 0000B501 B005                <1> 	mov	al, 5
  3178 0000B503 F9                  <1> 	stc
  3179                              <1> msftdf_rest_cdir_err_retn:
  3180                              <1> msftdf_return:
  3181 0000B504 C3                  <1> 	retn
  3182                              <1> 
  3183                              <1> msftdf_phase_1_return:
  3184 0000B505 31C0                <1> 	xor	eax, eax
  3185 0000B507 A2[F2820100]        <1> 	mov	[move_cmd_phase], al ; 0
  3186 0000B50C FEC0                <1> 	inc	al ; mov al, 1
  3187 0000B50E BB[5AB50000]        <1> 	mov	ebx, msftdf_df2_check_directory
  3188                              <1> 	;mov	edx, 0FFFFFFFFh 
  3189 0000B513 C3                  <1> 	retn
  3190                              <1> 
  3191                              <1> msftdf_save_sf_structure:
  3192 0000B514 BE[FC800100]        <1> 	mov	esi, FindFile_DirEntry
  3193 0000B519 BF[42820100]        <1> 	mov	edi, SourceFile_DirEntry
  3194                              <1> 	;mov	ecx, 8
  3195                              <1> 	; 29/07/2022
  3196 0000B51E 29C9                <1> 	sub	ecx, ecx
  3197 0000B520 B108                <1> 	mov	cl, 8
  3198 0000B522 F3A5                <1> 	rep	movsd
  3199                              <1> 
  3200                              <1> msftdf_df_copy_sf_parameters:
  3201 0000B524 BE0B000000          <1> 	mov	esi, 11
  3202 0000B529 89F7                <1> 	mov	edi, esi
  3203 0000B52B 81C6[42820100]      <1> 	add	esi, SourceFile_DirEntry
  3204 0000B531 81C7[C2820100]      <1> 	add	edi, DestinationFile_DirEntry
  3205                              <1> 	;mov	ecx, 21
  3206 0000B537 B115                <1> 	mov	cl, 21
  3207 0000B539 F3A4                <1> 	rep	movsb
  3208                              <1> 
  3209                              <1> msftdf_restore_current_dir_2:
  3210 0000B53B 803D[BF2F0100]00    <1> 	cmp	byte [Restore_CDIR], 0
  3211 0000B542 760D                <1> 	jna	short msftdf_df2_check_move_cmd_phase
  3212 0000B544 8B35[F4820100]      <1>  	mov	esi, [msftdf_drv_offset]
  3213 0000B54A E849C3FFFF          <1> 	call	restore_current_directory
  3214 0000B54F 72B3                <1> 	jc	short msftdf_rest_cdir_err_retn
  3215                              <1> 
  3216                              <1> msftdf_df2_check_move_cmd_phase:
  3217 0000B551 803D[F2820100]01    <1> 	cmp	byte [move_cmd_phase], 1
  3218 0000B558 74AB                <1> 	je	short msftdf_phase_1_return
  3219                              <1> 
  3220                              <1> msftdf_df2_check_directory:
  3221 0000B55A BE[71820100]        <1> 	mov	esi, DestinationFile_Directory
  3222 0000B55F 803E20              <1> 	cmp	byte [esi], 20h
  3223 0000B562 760F                <1> 	jna	short msftdf_make_dfde_locate_ffe_on_directory
  3224                              <1> msftdf_df2_change_directory:
  3225 0000B564 FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  3226 0000B56A 30E4                <1> 	xor	ah, ah ; CD_COMMAND sign -> 0 
  3227 0000B56C E8F7EFFFFF          <1> 	call	change_current_directory
  3228 0000B571 7291                <1> 	jc	short msftdf_return
  3229                              <1> 
  3230                              <1> ;msftdf_df2_change_prompt_dir_string:
  3231                              <1> ;	call	change_prompt_dir_string
  3232                              <1> 
  3233                              <1> msftdf_make_dfde_locate_ffe_on_directory:
  3234                              <1> 	; Current directory fcluster <> Directory buffer cluster
  3235                              <1> 	; Current directory will be reloaded by
  3236                              <1> 	; 'locate_current_dir_file' procedure
  3237                              <1> 	;
  3238                              <1> 	;xor	ax, ax
  3239 0000B573 31C0                <1> 	xor	eax, eax
  3240 0000B575 89C1                <1> 	mov	ecx, eax
  3241 0000B577 6649                <1> 	dec	cx ; FFFFh  
  3242                              <1> 		; CX = FFFFh -> find first deleted or free entry
  3243                              <1> 		; ESI would be ASCIIZ filename address if the call
  3244                              <1> 		; would not be for first free or deleted dir entry  
  3245 0000B579 E83DF2FFFF          <1> 	call	locate_current_dir_file
  3246                              <1> 	; 07/08/2022
  3247 0000B57E 733F                <1> 	jnc	short msftdf_make_dfde_set_ff_dir_entry
  3248                              <1> 	
  3249                              <1> 	;cmp	eax, 2
  3250 0000B580 3C02                <1>         cmp	al, 2
  3251 0000B582 7537                <1> 	jne	short msftdf_error_retn
  3252                              <1> 
  3253                              <1> msftdf_add_new_dir_entry_check_fs:
  3254 0000B584 8B35[F4820100]      <1> 	mov	esi, [msftdf_drv_offset]
  3255 0000B58A A1[367F0100]        <1> 	mov 	eax, [DirBuff_Cluster]
  3256 0000B58F 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
  3257 0000B593 7711                <1> 	ja	short msftdf_add_new_subdir_cluster
  3258                              <1> 
  3259                              <1> msftdf_add_new_fs_subdir_section:
  3260                              <1> 	;CL=0, CH=E5h --> deleted entry, CH=0 --> free entry
  3261                              <1>         ;xor	cx, cx
  3262 0000B595 30ED                <1> 	xor	ch, ch ; cx = 0 --> add a new subdir section
  3263 0000B597 E86A0C0000          <1> 	call	add_new_fs_section
  3264 0000B59C 721E                <1>         jc	short msftdf_dsfde_error_retn
  3265                              <1> 	;mov	[createfile_LastDirCluster], eax
  3266                              <1> 
  3267 0000B59E E85A0E0000          <1> 	call	load_FS_sub_directory 
  3268                              <1> 	;mov	ebx, Directory_Buffer 
  3269 0000B5A3 7318                <1> 	jnc	short msftdf_add_new_fs_subdir_section_ok
  3270 0000B5A5 C3                  <1> 	retn	 
  3271                              <1> 
  3272                              <1> msftdf_add_new_subdir_cluster:
  3273 0000B5A6 E8E8140000          <1> 	call	add_new_cluster
  3274 0000B5AB 720F                <1> 	jc	short msftdf_dsfde_error_retn
  3275                              <1> 	
  3276                              <1> 	;mov	[createfile_LastDirCluster], eax
  3277                              <1> 
  3278 0000B5AD E8110E0000          <1> 	call	load_FAT_sub_directory
  3279 0000B5B2 7309                <1> 	jnc	short msftdf_add_new_subdir_cluster_ok
  3280                              <1> 	; EBX = Directory buffer address
  3281                              <1> 
  3282                              <1> msftdf_ansdc_update_parent_dir_lmdt:
  3283                              <1> msftdf_make_dfde_err_upd_pdir_lmdt:
  3284 0000B5B4 50                  <1> 	push	eax
  3285 0000B5B5 E86EFAFFFF          <1> 	call	update_parent_dir_lmdt
  3286 0000B5BA 58                  <1> 	pop	eax
  3287                              <1> 
  3288                              <1> msftdf_error_retn:
  3289 0000B5BB F9                  <1> 	stc
  3290                              <1> msftdf_dsfde_restore_cdir_failed:
  3291                              <1> msftdf_dsfde_error_retn:
  3292 0000B5BC C3                  <1> 	retn
  3293                              <1> 
  3294                              <1> msftdf_add_new_fs_subdir_section_ok:
  3295                              <1> msftdf_add_new_subdir_cluster_ok:
  3296 0000B5BD 89DF                <1> 	mov	edi, ebx ; Directory buffer address
  3297                              <1> 
  3298                              <1> msftdf_make_dfde_set_ff_dir_entry:
  3299 0000B5BF 8B15[04780100]      <1> 	mov	edx, [Current_Dir_FCluster]
  3300 0000B5C5 8915[58830100]      <1> 	mov	[createfile_FFCluster], edx
  3301                              <1> 	; EDI = Directory entry offset
  3302 0000B5CB BE[C2820100]        <1> 	mov	esi, DestinationFile_DirEntry
  3303                              <1> 	;mov	ecx, 8
  3304                              <1> 	; 29/07/2022
  3305 0000B5D0 29C9                <1> 	sub	ecx, ecx
  3306 0000B5D2 B108                <1> 	mov	cl, 8
  3307 0000B5D4 F3A5                <1> 	rep	movsd
  3308                              <1> 
  3309 0000B5D6 C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2 
  3310 0000B5DD E8AEF9FFFF          <1> 	call	save_directory_buffer
  3311 0000B5E2 72D0                <1> 	jc	short msftdf_make_dfde_err_upd_pdir_lmdt
  3312                              <1> 
  3313                              <1> msftdf_make_dfde_update_pdir_lmdt:
  3314 0000B5E4 E83FFAFFFF          <1> 	call	update_parent_dir_lmdt
  3315                              <1> 
  3316                              <1> msftdf_dsfde_restore_current_dir_1:
  3317 0000B5E9 803D[BF2F0100]00    <1> 	cmp	byte [Restore_CDIR], 0
  3318 0000B5F0 760D                <1> 	jna	short msftdf_dsfde_check_directory
  3319 0000B5F2 8B35[F4820100]      <1>  	mov	esi, [msftdf_drv_offset]
  3320 0000B5F8 E89BC2FFFF          <1> 	call	restore_current_directory
  3321 0000B5FD 72BD                <1> 	jc	short msftdf_dsfde_restore_cdir_failed
  3322                              <1> 
  3323                              <1> msftdf_dsfde_check_directory:
  3324 0000B5FF BE[F1810100]        <1> 	mov	esi, SourceFile_Directory
  3325 0000B604 803E20              <1> 	cmp	byte [esi], 20h
  3326 0000B607 760F                <1> 	jna	short msftdf_dsfde_find_file
  3327                              <1> 
  3328                              <1> msftdf_dsfde_change_directory:
  3329 0000B609 FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  3330 0000B60F 28E4                <1> 	sub	ah, ah ; CD_COMMAND sign -> 0 
  3331 0000B611 E852EFFFFF          <1> 	call	change_current_directory
  3332 0000B616 72A4                <1> 	jc	short msftdf_dsfde_error_retn
  3333                              <1> 
  3334                              <1> ;msftdf_dsfde_sf_change_prompt_dir_string:
  3335                              <1> ;	call	change_prompt_dir_string
  3336                              <1> 
  3337                              <1> msftdf_dsfde_find_file:
  3338 0000B618 BE[32820100]        <1> 	mov	esi, SourceFile_Name  ; Offset 66
  3339 0000B61D 668B460E            <1> 	mov	ax, [esi+14] ; 80 -> SourceFile_AttributesMask
  3340 0000B621 E86AD4FFFF          <1> 	call	find_first_file
  3341 0000B626 7294                <1> 	jc	short msftdf_dsfde_error_retn
  3342                              <1> 
  3343                              <1> msftdf_dsfde_delete_direntry:
  3344 0000B628 8B35[F4820100]      <1> 	mov	esi, [msftdf_drv_offset]
  3345                              <1> 	
  3346 0000B62E 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
  3347 0000B632 770A                <1> 	ja	short msftdf_delete_FAT_direntry
  3348                              <1> 	
  3349 0000B634 30DB                <1> 	xor	bl, bl
  3350                              <1> 	; BL = 0 -> File
  3351                              <1> 	; EDI -> Directory buffer entry offset/address 
  3352 0000B636 E8CB0B0000          <1> 	call	delete_fs_directory_entry
  3353 0000B63B 7315                <1> 	jnc	short msftdf_dsfde_restore_current_dir_2
  3354 0000B63D C3                  <1> 	retn
  3355                              <1> 
  3356                              <1> msftdf_delete_FAT_direntry:	
  3357 0000B63E 8A1D[F9800100]      <1> 	mov	bl, [FindFile_LongNameEntryLength]
  3358 0000B644 668B0D[24810100]    <1> 	mov	cx, [FindFile_DirEntryNumber]
  3359                              <1> 	; ESI = Logical DOS drive description table address
  3360                              <1> 	; EDI = Directory buffer entry offset/address 
  3361 0000B64B E8A0FCFFFF          <1> 	call	delete_directory_entry
  3362 0000B650 721C                <1> 	jc	short msftdf_retn
  3363                              <1> 
  3364                              <1> msftdf_dsfde_restore_current_dir_2:
  3365 0000B652 803D[BF2F0100]00    <1> 	cmp	byte [Restore_CDIR], 0
  3366 0000B659 7607                <1> 	jna	short msftdf_new_dir_fcluster_retn
  3367                              <1> 	;mov	esi, [msftdf_drv_offset]
  3368 0000B65B E838C2FFFF          <1> 	call	restore_current_directory
  3369 0000B660 720C                <1> 	jc	short msftdf_retn
  3370                              <1> 
  3371                              <1> msftdf_new_dir_fcluster_retn:
  3372 0000B662 31C9                <1> 	xor	ecx, ecx 
  3373 0000B664 A1[58830100]        <1> 	mov	eax, [createfile_FFCluster]
  3374 0000B669 BB[70820100]        <1> 	mov	ebx, DestinationFile_Drv
  3375                              <1> 
  3376                              <1> msftdf_retn:
  3377 0000B66E C3                  <1> 	retn
  3378                              <1> 
  3379                              <1> 
  3380                              <1> copy_source_file_to_destination_file:
  3381                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  3382                              <1> 	; 17/10/2016
  3383                              <1> 	; 16/10/2016
  3384                              <1> 	; 15/10/2016
  3385                              <1> 	; 30/03/2016, 31/03/2016
  3386                              <1> 	; 24/03/2016, 25/03/2016, 28/03/2016
  3387                              <1> 	; 21/03/2016, 22/03/2016, 23/03/2016
  3388                              <1> 	; 16/03/2016, 17/03/2016, 18/03/2016
  3389                              <1> 	; 15/03/2016 (TRDOS 386 = TRDOS v2.0)
  3390                              <1> 	; 02/09/2011 (FILE.ASM 'copy_source_file_to_destination_file')
  3391                              <1> 	; 01/08/2010 - 18/05/2011
  3392                              <1> 	;
  3393                              <1> 	;   Command Interpreter phase 1 enter ->
  3394                              <1> 	;           AL = 1 -> Caller is command interpreter
  3395                              <1> 	;           AL = 2 -> The second call, re-enter/continue
  3396                              <1> 	;   Phase 1 -> Check source file
  3397                              <1> 	;              'found' is required
  3398                              <1> 	;   Phase 2 -> Check destination file, 
  3399                              <1> 	;              save 'found' or 'not found' status
  3400                              <1> 	;              'permission denied' error will be return
  3401                              <1> 	;              if attributes have not for ordinary file 
  3402                              <1> 	;              without readonly attribute
  3403                              <1> 	;   Command Interpreter phase 1 return ->
  3404                              <1> 	;              DH = Source file attributes
  3405                              <1> 	;              DL = Destination file found status
  3406                              <1> 	;              EAX = 0 
  3407                              <1> 	;   Command Interpreter phase 2 enter ->
  3408                              <1> 	;              AL = 2 -> Continue from the last position
  3409                              <1> 	;              AH = 
  3410                              <1> 	;   Phase 3 -> Load source file or use read/write cluster method
  3411                              <1> 	;   Phase 4 -> Create destination file if it is not found
  3412                              <1> 	;   Phase 5 -> Open destination file
  3413                              <1> 	;   Phase 6 -> Read from source and write to destination
  3414                              <1> 	;   Phase 7 -> Unload source file, if it is loaded at memory
  3415                              <1> 	;       cf = 1 causes to return before the phase 7
  3416                              <1> 	;              but loaded file will be unloaded
  3417                              <1> 	;	       (allocated memory block will be deallocated) 
  3418                              <1> 	;
  3419                              <1> 	; INPUT -> 
  3420                              <1> 	;	 ESI = Source File Pathname (Asciiz)
  3421                              <1> 	;        EDI = Destination File Pathname (Asciiz)
  3422                              <1> 	;        AL = 0 --> Interrupt (System call)
  3423                              <1> 	;        AL > 0 --> Command Interpreter (Question)
  3424                              <1> 	;        AL = 1 --> Question Phase
  3425                              <1> 	;        AL = 2 --> Progress Phase        
  3426                              <1> 	;
  3427                              <1> 	; OUTPUT -> 
  3428                              <1> 	;	cf = 0 -> OK
  3429                              <1> 	;	EAX = Destination file first cluster
  3430                              <1> 	;
  3431                              <1> 	;        CL > 0 if there is file reading error before EOF
  3432                              <1> 	;	        (incomplete copy) 
  3433                              <1> 	;        CH > 0 if file is (full) loaded at memory
  3434                              <1> 	;
  3435                              <1> 	;	cf = 1 -> Error code in AL (EAX) 
  3436                              <1> 	;
  3437                              <1> 	; (EBX, ECX, ESI, EDI register contents will be changed)           
  3438                              <1> 
  3439                              <1> 
  3440 0000B66F 3C02                <1> 	cmp	al, 2
  3441                              <1> 	;je	csftdf2_check_cdrv
  3442                              <1> 	; 29/07/2022
  3443 0000B671 7205                <1> 	jb	short csftdf_ph1
  3444                              <1> 	;jmp	csftdf2_check_cdrv
  3445 0000B673 E94F020000          <1> 	jmp	csftdf_ph2
  3446                              <1> 
  3447                              <1> ; Phase 1
  3448                              <1> 	; 29/07/2022
  3449                              <1> csftdf_ph1:
  3450 0000B678 A2[18830100]        <1> 	mov	byte [copy_cmd_phase], al
  3451                              <1> 
  3452 0000B67D 57                  <1> 	push	edi ; *
  3453                              <1> 
  3454                              <1> csftdf_parse_sf_path:
  3455 0000B67E BF[F0810100]        <1> 	mov	edi, SourceFile_Drv
  3456 0000B683 E8CCF4FFFF          <1> 	call	parse_path_name
  3457 0000B688 721C                <1> 	jc	short csftdf_parse_sf_path_failed
  3458                              <1> 
  3459                              <1> csftdf_parse_df_path:	
  3460 0000B68A 5E                  <1> 	pop	esi ; * (pushed edi) 
  3461                              <1> 
  3462                              <1> csftdf_sf_check_filename_exists:
  3463 0000B68B 803D[32820100]21    <1> 	cmp	byte [SourceFile_Name], 21h
  3464 0000B692 7215                <1> 	jb	short csftdf_sf_file_not_found_error
  3465                              <1> 
  3466 0000B694 BF[70820100]        <1> 	mov	edi, DestinationFile_Drv
  3467 0000B699 E8B6F4FFFF          <1> 	call	parse_path_name
  3468 0000B69E 7310                <1> 	jnc	short csftdf_check_sf_cdrv
  3469                              <1> 	
  3470 0000B6A0 3C01                <1> 	cmp	al, 1 ; File or directory name is not existing
  3471 0000B6A2 760C                <1> 	jna	short csftdf_check_sf_cdrv
  3472                              <1> 
  3473                              <1> csftdf_parse_df_path_failed:
  3474 0000B6A4 F9                  <1> 	stc 
  3475                              <1> csftdf_sf_error_retn: 
  3476 0000B6A5 C3                  <1> 	retn
  3477                              <1> 
  3478                              <1> csftdf_parse_sf_path_failed:	
  3479 0000B6A6 5F                  <1> 	pop	edi ; *
  3480 0000B6A7 EBFC                <1> 	jmp	short csftdf_sf_error_retn
  3481                              <1> 
  3482                              <1> csftdf_sf_file_not_found_error:
  3483 0000B6A9 B802000000          <1> 	mov	eax, 2 ; File not found 
  3484 0000B6AE EBF5                <1> 	jmp	short csftdf_sf_error_retn
  3485                              <1> 
  3486                              <1> csftdf_check_sf_cdrv:
  3487 0000B6B0 8A3D[0A780100]      <1> 	mov	bh, [Current_Drv]
  3488                              <1> 
  3489 0000B6B6 883D[1B830100]      <1> 	mov	[csftdf_cdrv], bh ; 23/03/2016
  3490                              <1> 
  3491 0000B6BC 8A15[F0810100]      <1> 	mov	dl, [SourceFile_Drv]
  3492 0000B6C2 38FA                <1> 	cmp	dl, bh ; byte [Current_Drv]
  3493 0000B6C4 7407                <1> 	je	short csftdf_sf_check_directory
  3494                              <1> 
  3495 0000B6C6 E817C1FFFF          <1> 	call	change_current_drive
  3496 0000B6CB 72D8                <1> 	jc	short csftdf_sf_error_retn
  3497                              <1> 
  3498                              <1> csftdf_sf_check_directory:
  3499 0000B6CD BE[F1810100]        <1> 	mov	esi, SourceFile_Directory
  3500 0000B6D2 803E20              <1> 	cmp	byte [esi], 20h
  3501 0000B6D5 760F                <1> 	jna	short csftdf_find_sf
  3502                              <1> 
  3503                              <1> csftdf_sf_change_directory:
  3504 0000B6D7 FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  3505 0000B6DD 30E4                <1> 	xor	ah, ah ; CD_COMMAND sign -> 0 
  3506 0000B6DF E884EEFFFF          <1> 	call	change_current_directory
  3507 0000B6E4 72BF                <1> 	jc	short csftdf_sf_error_retn
  3508                              <1> 
  3509                              <1> ;csftdf_sf_change_prompt_dir_string:
  3510                              <1> ;	call	change_prompt_dir_string
  3511                              <1> 
  3512                              <1> csftdf_find_sf:
  3513 0000B6E6 BE[32820100]        <1> 	mov	esi, SourceFile_Name
  3514 0000B6EB 66B80018            <1> 	mov	ax, 1800h ; Except volume label and dirs
  3515 0000B6EF E89CD3FFFF          <1> 	call	find_first_file
  3516 0000B6F4 72AF                <1> 	jc	short csftdf_sf_error_retn
  3517                              <1> 
  3518                              <1> csftdf_sf_ambgfn_check:
  3519 0000B6F6 6621D2              <1> 	and	dx, dx ; Ambiguous filename chars used sign (DX>0)
  3520 0000B6F9 7406                <1> 	jz	short csftdf_sf_found
  3521                              <1> 
  3522                              <1> csftdf_ambiguous_file_name_error:
  3523                              <1> 	;mov	eax, 2 ; File not found error
  3524                              <1> 	; 29/07/2022
  3525 0000B6FB 29C0                <1> 	sub	eax, eax
  3526 0000B6FD B002                <1> 	mov	al, 2
  3527 0000B6FF F9                  <1> 	stc
  3528 0000B700 C3                  <1> 	retn
  3529                              <1> 
  3530                              <1> csftdf_sf_found:
  3531 0000B701 A3[1C830100]        <1> 	mov	[csftdf_filesize], eax
  3532                              <1> 
  3533 0000B706 09C0                <1> 	or	eax, eax
  3534 0000B708 7506                <1> 	jnz	short csftdf_set_source_file_direntry
  3535                              <1> 
  3536                              <1> csftdf_sf_file_size_zero:
  3537                              <1> 	;mov	eax, 20 ; TRDOS zero length (file size) error
  3538                              <1> 	; 29/07/2022
  3539 0000B70A 29C0                <1> 	sub	eax, eax
  3540 0000B70C B014                <1> 	mov	al, 20
  3541 0000B70E F9                  <1> 	stc
  3542 0000B70F C3                  <1> 	retn
  3543                              <1> 
  3544                              <1> csftdf_set_source_file_direntry:
  3545 0000B710 BE[FC800100]        <1> 	mov	esi, FindFile_DirEntry
  3546 0000B715 BF[42820100]        <1> 	mov	edi, SourceFile_DirEntry
  3547                              <1> 	;mov	ecx, 8
  3548                              <1> 	; 29/07/2022
  3549 0000B71A 31C9                <1> 	xor	ecx, ecx
  3550 0000B71C B108                <1> 	mov	cl, 8
  3551 0000B71E F3A5                <1> 	rep	movsd
  3552                              <1> 
  3553                              <1> csftdf_sf_restore_cdrv:
  3554                              <1> 	; 22/03/2016
  3555 0000B720 8A15[1B830100]      <1> 	mov	dl, [csftdf_cdrv]
  3556 0000B726 3A15[0A780100]      <1> 	cmp	dl, [Current_Drv]
  3557 0000B72C 7407                <1> 	je	short csftdf_sf_restore_cdir
  3558 0000B72E E8AFC0FFFF          <1> 	call	change_current_drive 
  3559 0000B733 724F                <1> 	jc	short csftdf_df_error_retn ; 30/03/2016
  3560                              <1> 
  3561                              <1> csftdf_sf_restore_cdir:
  3562 0000B735 803D[BF2F0100]00    <1> 	cmp	byte [Restore_CDIR], 0
  3563 0000B73C 7612                <1> 	jna	short csftdf_df_check_filename_exists
  3564 0000B73E 29C0                <1> 	sub	eax, eax
  3565 0000B740 BE00010900          <1> 	mov	esi, Logical_DOSDisks
  3566 0000B745 88D4                <1> 	mov	ah, dl ; byte [csftdf_cdrv]
  3567 0000B747 01C6                <1> 	add	esi, eax
  3568 0000B749 E84AC1FFFF          <1> 	call	restore_current_directory
  3569 0000B74E 7234                <1> 	jc	short csftdf_df_error_retn
  3570                              <1>   
  3571                              <1> csftdf_df_check_filename_exists:
  3572 0000B750 803D[B2820100]20    <1> 	cmp	byte [DestinationFile_Name], 20h
  3573 0000B757 7716                <1> 	ja	short csftdf_check_df_cdrv
  3574                              <1> 
  3575                              <1> csftdf_copy_sf_name:
  3576 0000B759 BF[B2820100]        <1> 	mov	edi, DestinationFile_Name
  3577 0000B75E BE[32820100]        <1> 	mov	esi, SourceFile_Name
  3578 0000B763 B10C                <1> 	mov	cl, 12
  3579                              <1> 
  3580                              <1> csftdf_df_copy_sf_name_loop:
  3581 0000B765 AC                  <1> 	lodsb
  3582 0000B766 AA                  <1> 	stosb
  3583 0000B767 08C0                <1> 	or	al, al
  3584 0000B769 7404                <1> 	jz	short csftdf_check_df_cdrv             
  3585 0000B76B FEC9                <1> 	dec	cl
  3586 0000B76D 75F6                <1> 	jnz	csftdf_df_copy_sf_name_loop
  3587                              <1> 
  3588                              <1> csftdf_check_df_cdrv:
  3589 0000B76F 8A15[70820100]      <1> 	mov	dl, [DestinationFile_Drv]
  3590 0000B775 3A15[0A780100]      <1> 	cmp	dl, [Current_Drv]
  3591 0000B77B 7408                <1> 	je	short csftdf_df_check_directory
  3592                              <1> 
  3593 0000B77D E860C0FFFF          <1> 	call	change_current_drive
  3594 0000B782 7301                <1> 	jnc	short csftdf_df_check_directory
  3595                              <1> 
  3596                              <1> csftdf_df_error_retn:
  3597 0000B784 C3                  <1> 	retn
  3598                              <1> 
  3599                              <1> csftdf_df_check_directory:
  3600 0000B785 BE[71820100]        <1> 	mov	esi, DestinationFile_Directory
  3601 0000B78A 803E20              <1>         cmp     byte [esi], 20h
  3602 0000B78D 760F                <1> 	jna	short csftdf_find_df
  3603                              <1> 
  3604                              <1> csftdf_df_change_directory:
  3605 0000B78F FE05[BF2F0100]      <1> 	inc	byte [Restore_CDIR]
  3606 0000B795 28E4                <1> 	sub	ah, ah ; CD_COMMAND sign -> 0 
  3607 0000B797 E8CCEDFFFF          <1> 	call	change_current_directory
  3608 0000B79C 72E6                <1> 	jc	short csftdf_df_error_retn
  3609                              <1> 
  3610                              <1> ;csftdf_df_change_prompt_dir_string:
  3611                              <1> ;	call	change_prompt_dir_string
  3612                              <1> 
  3613                              <1> csftdf_find_df:
  3614                              <1> 	; 23/03/2016
  3615 0000B79E 29DB                <1> 	sub	ebx, ebx
  3616 0000B7A0 8A3D[70820100]      <1> 	mov	bh,  [DestinationFile_Drv]
  3617 0000B7A6 81C300010900        <1> 	add	ebx, Logical_DOSDisks
  3618 0000B7AC 891D[48830100]      <1> 	mov	[csftdf_df_drv_dt], ebx
  3619                              <1> 
  3620 0000B7B2 BE[B2820100]        <1> 	mov	esi, DestinationFile_Name
  3621 0000B7B7 6631C0              <1> 	xor	ax, ax 
  3622                              <1> 		; DestinationFile_AttributesMask -> any/zero
  3623 0000B7BA E8D1D2FFFF          <1> 	call	find_first_file
  3624 0000B7BF 7217                <1> 	jc	short csftdf_df_check_error_code
  3625                              <1> 
  3626                              <1> csftdf_df_ambgfn_check:
  3627 0000B7C1 6609D2              <1> 	or	dx, dx ; Ambiguous filename chars used sign (DX>0)
  3628 0000B7C4 7529                <1> 	jnz	short csftdf_df_error_inv_fname
  3629                              <1> 	
  3630                              <1> csftdf_df_found:
  3631 0000B7C6 C605[1A830100]01    <1> 	mov	byte [DestinationFileFound], 1
  3632                              <1> 	; 17/10/2016 (cl -> bl)
  3633 0000B7CD 80E31F              <1> 	and	bl, 1Fh ; Attributes, D-V-S-H-R
  3634 0000B7D0 7459                <1> 	jz	short csftdf_df_save_first_cluster
  3635                              <1> 
  3636                              <1> csftdf_df_permission_denied_retn:	 
  3637                              <1> 	;mov	eax, 05h ; Access/Permission denied.
  3638                              <1> 	; 29/07/2022
  3639 0000B7D2 29C0                <1> 	sub	eax, eax
  3640 0000B7D4 B005                <1> 	mov	al, 5
  3641                              <1> csftdf_df_error_stc_retn:
  3642 0000B7D6 F9                  <1> 	stc
  3643 0000B7D7 C3                  <1> 	retn
  3644                              <1> 
  3645                              <1> csftdf_df_check_error_code:
  3646                              <1> 	;cmp	eax, 2
  3647 0000B7D8 3C02                <1> 	cmp	al, 2
  3648 0000B7DA 75FA                <1> 	jne	short csftdf_df_error_stc_retn
  3649                              <1> 
  3650 0000B7DC C605[1A830100]00    <1> 	mov	byte [DestinationFileFound], 0
  3651                              <1> 
  3652                              <1> 	; 15/10/2016
  3653 0000B7E3 BE[EC800100]        <1> 	mov	esi, FindFile_Name ; *
  3654 0000B7E8 E848D6FFFF          <1> 	call	check_filename
  3655 0000B7ED 7306                <1> 	jnc	short csftdf_df_valid_fname
  3656                              <1> csftdf_df_error_inv_fname: ; 'invalid file name !'
  3657                              <1> 	;mov 	eax, ERR_INV_FILE_NAME  ; 26
  3658                              <1> 	; 29/07/2022
  3659 0000B7EF 29C0                <1> 	sub	eax, eax
  3660 0000B7F1 B01A                <1> 	mov	al, ERR_INV_FILE_NAME ; 26
  3661 0000B7F3 F9                  <1> 	stc	
  3662 0000B7F4 C3                  <1> 	retn
  3663                              <1> 
  3664                              <1> csftdf_df_valid_fname:	
  3665                              <1> 	; 21/03/2016
  3666                              <1> 	; (Capitalized file name)
  3667                              <1> 	;mov	esi, FindFile_Name ; * ; 15/10/2016
  3668 0000B7F5 BF[B2820100]        <1> 	mov	edi, DestinationFile_Name
  3669 0000B7FA A5                  <1> 	movsd
  3670 0000B7FB A5                  <1> 	movsd	
  3671 0000B7FC A5                  <1> 	movsd
  3672                              <1> 	;movsb
  3673                              <1> 
  3674                              <1> csftdf_check_disk_free_size_0:
  3675 0000B7FD A1[5E820100]        <1> 	mov	eax, [SourceFile_DirEntry+DirEntry_FileSize]
  3676                              <1> 
  3677                              <1> csftdf_check_disk_free_size_1:
  3678                              <1> 	;sub	ebx, ebx
  3679                              <1> 	;mov 	esi, Logical_DOSDisks
  3680                              <1> 	;mov	bh,  [DestinationFile_Drv]
  3681                              <1> 	;add	esi, ebx
  3682                              <1> 	
  3683 0000B802 8B35[48830100]      <1> 	mov	esi, [csftdf_df_drv_dt] ; 23/03/2016
  3684                              <1> 
  3685 0000B808 0FB74E11            <1> 	movzx	ecx, word [esi+LD_BPB+BytesPerSec] ; 17, LD_BPB + 0Bh
  3686 0000B80C 01C8                <1> 	add	eax, ecx
  3687 0000B80E 48                  <1> 	dec	eax  ; file size (additional bytes) + 511 (round up)
  3688                              <1> csftdf_check_disk_free_size_3: ; 16/03/2016
  3689 0000B80F 29D2                <1> 	sub	edx, edx
  3690 0000B811 F7F1                <1> 	div	ecx ; bytes per sector
  3691                              <1> 
  3692                              <1> csftdf_check_disk_free_size:
  3693 0000B813 3B4674              <1> 	cmp	eax, [esi+LD_FreeSectors]
  3694                              <1>         ;jb	csftdf_check_disk_free_size_ok
  3695                              <1> 	; 29/07/2022
  3696 0000B816 7208                <1> 	jb	short csftdf_check_dfs_ok
  3697 0000B818 770B                <1> 	ja	short csftdf_df_insufficient_disk_space
  3698                              <1> 
  3699 0000B81A 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0 ; FS needs FDT sector also.
  3700                              <1> 	;ja	csftdf_check_disk_free_size_ok 
  3701                              <1> 	; 29/07/2022
  3702 0000B81E 7605                <1> 	jna	short csftdf_df_insufficient_disk_space
  3703                              <1> csftdf_check_dfs_ok:
  3704 0000B820 E985000000          <1> 	jmp	csftdf_check_disk_free_size_ok 
  3705                              <1> 
  3706                              <1> csftdf_df_insufficient_disk_space:
  3707                              <1> 	;mov	eax, 27h ; insufficient disk space
  3708                              <1> 	; 29/07/2022
  3709 0000B825 29C0                <1> 	sub	eax, eax
  3710 0000B827 B027                <1> 	mov	al, 27h
  3711 0000B829 EBAB                <1> 	jmp	short csftdf_df_error_stc_retn
  3712                              <1> 
  3713                              <1> csftdf_df_save_first_cluster:
  3714                              <1> 	; ESI = FindFile_DirEntry (for the old destination file)
  3715                              <1> 	; EAX = Old destination file size
  3716                              <1> 	; 24/03/2016
  3717                              <1> 	; EDI = Directory entry address (within Dir Buffer boundaries)
  3718 0000B82B 81EF00000800        <1> 	sub	edi, Directory_Buffer  ; (<65536)
  3719                              <1> 	;shr	di, 5 ; Convert entry offset to entry index/number
  3720                              <1> 	; 29/07/2022
  3721 0000B831 C1EF05              <1> 	shr	edi, 5
  3722 0000B834 66893D[EA820100]    <1> 	mov	[DestinationFile_DirEntryNumber], di ; (<2048)
  3723                              <1> 
  3724                              <1> csftdf_df_check_sf_df_fcluster:
  3725 0000B83B 668B5614            <1> 	mov	dx, [esi+DirEntry_FstClusHI]
  3726 0000B83F C1E210              <1> 	shl	edx, 16
  3727 0000B842 668B561A            <1> 	mov	dx, [esi+DirEntry_FstClusLO]
  3728 0000B846 8915[2C830100]      <1> 	mov	[csftdf_df_cluster], edx
  3729                              <1> csftdf_df_check_sf_df_fcluster_1:
  3730 0000B84C 668B15[56820100]    <1> 	mov	dx, [SourceFile_DirEntry+DirEntry_FstClusHI]
  3731 0000B853 C1E210              <1> 	shl	edx, 16
  3732 0000B856 668B15[5C820100]    <1> 	mov	dx, [SourceFile_DirEntry+DirEntry_FstClusLO]
  3733 0000B85D 3B15[2C830100]      <1> 	cmp	edx, [csftdf_df_cluster]
  3734 0000B863 7512                <1> 	jne	short csftdf_df_check_sf_df_fcluster_ok
  3735                              <1> csftdf_df_check_sf_df_drv:
  3736 0000B865 8A15[F0810100]      <1> 	mov	dl, [SourceFile_Drv]
  3737 0000B86B 3A15[70820100]      <1> 	cmp	dl, [DestinationFile_Drv]
  3738 0000B871 7504                <1> 	jne	short csftdf_df_check_sf_df_fcluster_ok
  3739                              <1> 
  3740                              <1> 	; source and destination files are same !
  3741                              <1> 	; (they have same first cluster value on same logical disk)
  3742                              <1> 
  3743 0000B873 31C0                <1> 	xor	eax, eax ; mov eax, 0 -> Bad command or file name !
  3744 0000B875 F9                  <1> 	stc
  3745 0000B876 C3                  <1> 	retn 
  3746                              <1>    
  3747                              <1> csftdf_df_check_sf_df_fcluster_ok:
  3748                              <1> csftdf_df_move_findfile_struct:
  3749                              <1> 	; mov	esi, FindFile_DirEntry
  3750 0000B877 BF[C2820100]        <1> 	mov	edi, DestinationFile_DirEntry
  3751                              <1> 	;mov	ecx, 8
  3752 0000B87C 31C9                <1> 	xor	ecx, ecx
  3753 0000B87E B108                <1> 	mov	cl, 8
  3754 0000B880 F3A5                <1> 	rep	movsd
  3755                              <1> 	
  3756                              <1> csftdf_check_disk_free_size_2:
  3757 0000B882 89C2                <1> 	mov	edx, eax ; Old destination file size
  3758                              <1> 
  3759                              <1> 	;mov	eax, [SourceFile_DirEntry+DirEntry_FileSize]
  3760 0000B884 A1[1C830100]        <1> 	mov	eax, [csftdf_filesize] ; 23/03/2016
  3761                              <1> 
  3762                              <1> 	;;sub	ecx, ecx ; 0
  3763                              <1> 	;mov 	esi, Logical_DOSDisks
  3764                              <1> 	;mov	ch,  [DestinationFile_Drv]
  3765                              <1> 	;add	esi, ecx
  3766                              <1> 	;
  3767                              <1> 	;mov	[csftdf_df_drv_dt], esi
  3768                              <1> 
  3769 0000B889 8B35[48830100]      <1> 	mov	esi, [csftdf_df_drv_dt] ; 23/03/2016
  3770                              <1> 
  3771 0000B88F 668B4E11            <1> 	mov	cx, [esi+LD_BPB+BytesPerSec] ; 17, LD_BPB + 0Bh
  3772 0000B893 01CA                <1> 	add	edx, ecx ; + 512
  3773 0000B895 01C8                <1> 	add	eax, ecx ; + 512
  3774 0000B897 4A                  <1> 	dec	edx ; old file size + 511 (round up)
  3775 0000B898 48                  <1> 	dec	eax ; new file size + 511 (round up)
  3776 0000B899 F7D9                <1> 	neg	ecx ; -512 ; 0FFFFFE00h
  3777 0000B89B 21CA                <1> 	and	edx, ecx ; = old sector count * 512 
  3778 0000B89D 21C8                <1> 	and	eax, ecx ; = new sector count * 512 
  3779                              <1> 
  3780 0000B89F 29D0                <1> 	sub	eax, edx ; new file size - old file size (on disk)
  3781 0000B8A1 7607                <1> 	jna	short csftdf_check_disk_free_size_ok
  3782                              <1> 
  3783 0000B8A3 F7D9                <1> 	neg	ecx ; 512 (bytes per sector) ; 200h
  3784                              <1> 	; check free space for additional sectors
  3785                              <1> 	; eax = number of additional sectors * bytes per sector
  3786                              <1> 	; esi = Logical DOS drive number (of destination disk)
  3787 0000B8A5 E965FFFFFF          <1>         jmp     csftdf_check_disk_free_size_3
  3788                              <1>  
  3789                              <1> csftdf_check_disk_free_size_ok:
  3790                              <1> 	; 18/03/2016
  3791                              <1> csftdf_df_check_copy_cmd_phase:
  3792 0000B8AA A0[18830100]        <1> 	mov	al, [copy_cmd_phase]
  3793 0000B8AF 3C01                <1> 	cmp	al, 1
  3794 0000B8B1 7514                <1> 	jne	short csftdf2_check_cdrv
  3795                              <1> 	
  3796 0000B8B3 31C0                <1> 	xor	eax, eax
  3797 0000B8B5 A2[18830100]        <1> 	mov	[copy_cmd_phase], al ; 0
  3798                              <1> 
  3799 0000B8BA 8A15[1A830100]      <1> 	mov	dl, [DestinationFileFound]            
  3800 0000B8C0 8A35[4D820100]      <1> 	mov	dh, [SourceFile_DirEntry+11] ; Attributes
  3801                              <1>  
  3802                              <1> csftdf_return:	
  3803 0000B8C6 C3                  <1> 	retn
  3804                              <1> 
  3805                              <1> ; Phase 2
  3806                              <1> csftdf_ph2:
  3807                              <1> 	; 29/07/2022
  3808                              <1> csftdf2_check_cdrv:
  3809                              <1> 	; 18/03/2016
  3810                              <1> 	; Here, destination drive and directory are ready !
  3811                              <1> 	; (checking/restoring is not needed)
  3812                              <1> 	; (Since at the end of the phase 1)
  3813                              <1> 
  3814                              <1> ;	mov	dl, [DestinationFile_Drv]
  3815                              <1> ;	cmp	dl, [Current_Drv]
  3816                              <1> ;	je	short csftdf2_df_check_directory
  3817                              <1> ;
  3818                              <1> ;	call	change_current_drive
  3819                              <1> ;	jc	short csftdf2_read_error
  3820                              <1> ;
  3821                              <1> ;csftdf2_df_check_directory:
  3822                              <1> ;	mov	esi, DestinationFile_Directory  
  3823                              <1> ;	cmp	byte [esi], 20h
  3824                              <1> ;	jna	short csftdf2_df_check_found_or_not
  3825                              <1> ;
  3826                              <1> ;csftdf2_df_change_directory:
  3827                              <1> ;	inc	byte [Restore_CDIR]
  3828                              <1> ;	xor	ah, ah ; CD_COMMAND sign -> 0 
  3829                              <1> ;	call	change_current_directory
  3830                              <1> ;	jc	short csftdf2_stc_return
  3831                              <1> ;
  3832                              <1> ;;csftdf2_df_change_prompt_dir_string:
  3833                              <1> ;;	call	change_prompt_dir_string
  3834                              <1> 
  3835                              <1> csftdf2_df_check_found_or_not:
  3836                              <1> 	; 21/03/2016
  3837 0000B8C7 803D[1A830100]00    <1> 	cmp	byte [DestinationFileFound], 0 
  3838 0000B8CE 773A                <1> 	ja	short csftdf2_set_sf_percentage
  3839                              <1> 
  3840                              <1> csftdf2_create_file:
  3841 0000B8D0 BE[B2820100]        <1> 	mov	esi, DestinationFile_Name
  3842 0000B8D5 A1[1C830100]        <1> 	mov	eax, [csftdf_filesize]
  3843 0000B8DA 30C9                <1> 	xor	cl, cl ; 0
  3844                              <1> 
  3845 0000B8DC 31DB                <1> 	xor	ebx, ebx ; 0
  3846 0000B8DE 4B                  <1> 	dec	ebx ; 0FFFFFFFFh 
  3847                              <1> 
  3848                              <1> 	; INPUT ->
  3849                              <1> 	; 	EAX -> File Size
  3850                              <1> 	; 	ESI = ASCIIZ File name
  3851                              <1> 	;	 CL = File attributes
  3852                              <1> 	;	EBX = FFFFFFFFh -> empty file sign for FAT fs
  3853                              <1> 	;	EBX <> FFFFFFFFh -> use file size for FAT fs 
  3854                              <1> 	;
  3855                              <1> 	; OUTPUT ->
  3856                              <1> 	;	EAX = New file's first cluster
  3857                              <1> 	;	ESI = Logical Dos Drv Descr. Table Addr.
  3858                              <1> 	;	EBX = CreateFile_Size address
  3859                              <1> 	;	ECX = Sectors per cluster (<256)
  3860                              <1> 	;	EDX = Directory Entry Index/Number (<65536)
  3861                              <1> 	;		
  3862                              <1> 	;	cf = 1 -> error code in AL (EAX)
  3863                              <1> 
  3864 0000B8DF E8EC050000          <1> 	call	create_file
  3865                              <1> 	;pop	esi
  3866                              <1> 	;jc	csftdf2_rw_error
  3867                              <1> 	; 29/07/2022
  3868 0000B8E4 7305                <1> 	jnc	short csftdf2_create_file_OK
  3869 0000B8E6 E9A3050000          <1> 	jmp	csftdf2_rw_error
  3870                              <1> 
  3871                              <1> csftdf2_create_file_OK:
  3872 0000B8EB A3[2C830100]        <1> 	mov	[csftdf_df_cluster], eax
  3873                              <1> 	
  3874                              <1> 	; 24/03/2016
  3875 0000B8F0 668915[EA820100]    <1> 	mov	[DestinationFile_DirEntryNumber], dx 
  3876                              <1> 
  3877                              <1> 	; 21/03/2016
  3878 0000B8F7 BE00000800          <1> 	mov	esi, Directory_Buffer
  3879 0000B8FC C1E205              <1> 	shl	edx, 5 ; 32 * index number
  3880 0000B8FF 01D6                <1> 	add	esi, edx
  3881 0000B901 BF[C2820100]        <1> 	mov	edi, DestinationFile_DirEntry	
  3882 0000B906 B108                <1> 	mov	cl, 8 ; 32 bytes
  3883 0000B908 F3A5                <1> 	rep	movsd
  3884                              <1> 
  3885                              <1> csftdf2_set_sf_percentage:
  3886                              <1> 	; 17/03/2016
  3887 0000B90A 31C0                <1> 	xor	eax, eax	
  3888 0000B90C A2[40830100]        <1> 	mov 	[csftdf_percentage], al ; 0, reset
  3889                              <1> 
  3890 0000B911 A3[38830100]        <1> 	mov	[csftdf_sf_rbytes], eax ; 0, reset
  3891 0000B916 A3[3C830100]        <1> 	mov	[csftdf_df_wbytes], eax ; 0, reset
  3892                              <1> 
  3893 0000B91B 8A25[F0810100]      <1> 	mov	ah, [SourceFile_Drv]	
  3894 0000B921 BE00010900          <1> 	mov	esi, Logical_DOSDisks
  3895 0000B926 01C6                <1> 	add	esi, eax
  3896                              <1> 	
  3897 0000B928 8935[44830100]      <1> 	mov	[csftdf_sf_drv_dt], esi ; 23/03/2016
  3898                              <1> 
  3899 0000B92E 668B15[56820100]    <1> 	mov	dx, [SourceFile_DirEntry+DirEntry_FstClusHI]
  3900 0000B935 C1E210              <1> 	shl	edx, 16
  3901 0000B938 668B15[5C820100]    <1> 	mov	dx, [SourceFile_DirEntry+DirEntry_FstClusLO]
  3902 0000B93F 8915[28830100]      <1> 	mov	[csftdf_sf_cluster], edx
  3903                              <1> 
  3904                              <1> 	; 16/03/2016
  3905                              <1> 	; Note: Singlix FS boot sector parameters (for cluster
  3906                              <1> 	;	related calculations) has same offset
  3907                              <1> 	;	values from LD_BPB as in FAT file system.
  3908                              <1> 	;	[esi+LD_BPB+SecPerClust] is 1 for Singlix FS.
  3909                              <1> 	;	
  3910 0000B945 0FB64E13            <1> 	movzx	ecx, byte [esi+LD_BPB+SecPerClust]
  3911 0000B949 880D[6E820100]      <1> 	mov	[SourceFile_SecPerClust], cl
  3912                              <1> 
  3913                              <1> 	; 17/03/2016
  3914 0000B94F 386E03              <1> 	cmp	[esi+LD_FATType], ch ; 0
  3915 0000B952 7707                <1> 	ja	short csftdf2_set_sf_percent_rsize1
  3916                              <1> 
  3917 0000B954 B800000100          <1> 	mov	eax, 65536 ; read/write buffer size for Singlix FS
  3918 0000B959 EB06                <1> 	jmp	short csftdf2_set_sf_percent_rsize2	
  3919                              <1>  
  3920                              <1> csftdf2_set_sf_percent_rsize1:
  3921 0000B95B 668B4611            <1> 	mov	ax, [esi+LD_BPB+BytesPerSec]
  3922 0000B95F F7E1                <1> 	mul	ecx
  3923                              <1> 	;sub	edx, edx
  3924                              <1> csftdf2_set_sf_percent_rsize2:
  3925 0000B961 A3[30830100]        <1> 	mov	[csftdf_r_size], eax
  3926                              <1> 
  3927                              <1> csftdf2_set_df_percentage:
  3928                              <1> 	;sub	eax, eax
  3929                              <1> 	;mov	ah, [DestinationFile_Drv]	
  3930                              <1> 	;mov	edi, Logical_DOSDisks
  3931                              <1> 	;add	edi, eax
  3932                              <1> 	;mov	[csftdf_df_drv_dt], edi ; 17/03/2016
  3933                              <1> 
  3934 0000B966 8B3D[48830100]      <1> 	mov	edi, [csftdf_df_drv_dt] ; 23/03/2016
  3935                              <1> 
  3936                              <1> 	; 16/03/2016
  3937                              <1> 	; Note: Singlix FS boot sector parameters (for cluster
  3938                              <1> 	;	related calculations) has same offset
  3939                              <1> 	;	values from LD_BPB as in FAT file system.
  3940                              <1> 	;	[edi+LD_BPB+SecPerClust] is 1 for Singlix FS.
  3941                              <1> 	;	
  3942                              <1> 	;movzx	ecx, byte [edi+LD_BPB+SecPerClust]
  3943 0000B96C 8A4F13              <1> 	mov	cl, [edi+LD_BPB+SecPerClust]
  3944 0000B96F 880D[EE820100]      <1> 	mov	[DestinationFile_SecPerClust], cl
  3945                              <1> 
  3946                              <1> 	; 17/03/2016
  3947 0000B975 386F03              <1> 	cmp	[edi+LD_FATType], ch ; 0
  3948 0000B978 7707                <1> 	ja	short csftdf2_set_df_percent_wsize1
  3949                              <1> 	
  3950 0000B97A B800000100          <1> 	mov	eax, 65536 ; read/write buffer size for Singlix FS
  3951 0000B97F EB06                <1> 	jmp	short csftdf2_set_df_percent_wsize2	
  3952                              <1> 
  3953                              <1> csftdf2_set_df_percent_wsize1:
  3954 0000B981 0FB74711            <1> 	movzx	eax, word [edi+LD_BPB+BytesPerSec]
  3955 0000B985 F7E1                <1> 	mul	ecx
  3956                              <1> 	;sub	edx, edx
  3957                              <1> csftdf2_set_df_percent_wsize2:
  3958 0000B987 A3[34830100]        <1> 	mov	[csftdf_w_size], eax
  3959                              <1> 
  3960 0000B98C A1[1C830100]        <1> 	mov	eax, [csftdf_filesize]
  3961                              <1> 
  3962 0000B991 3D00000100          <1> 	cmp	eax, 65536 ; 64KB	; small file
  3963 0000B996 721F                <1> 	jb	short csftdf2_load_file ; do not display percentage
  3964                              <1> 	
  3965                              <1> csftdf2_reset_wf_percent_ptr_chk_64k:
  3966 0000B998 B201                <1> 	mov	dl, 1 ; 25/03/2016
  3967                              <1> 
  3968 0000B99A 3D00000400          <1> 	cmp	eax, 65536*4 ; 256KB
  3969 0000B99F 7310                <1> 	jnb	short csftdf2_enable_percentage_display ; big file
  3970                              <1> 
  3971                              <1> 	; 64-128KB file size for floppy disks
  3972 0000B9A1 3815[F0810100]      <1> 	cmp	byte [SourceFile_Drv], dl ; 1 ; read from floppy disk ?
  3973 0000B9A7 7608                <1> 	jna	short csftdf2_enable_percentage_display
  3974                              <1> 
  3975 0000B9A9 3815[70820100]      <1> 	cmp	byte [DestinationFile_Drv], dl ; 1 ; write to floppy disk ?
  3976 0000B9AF 7706                <1> 	ja	short csftdf2_load_file
  3977                              <1> 
  3978                              <1> csftdf2_enable_percentage_display:	
  3979 0000B9B1 8815[40830100]      <1> 	mov	[csftdf_percentage], dl ; 1	
  3980                              <1> 	
  3981                              <1> csftdf2_load_file:
  3982                              <1> 	; 13/05/2016
  3983                              <1> 	; 19/03/2016
  3984                              <1> 	; 18/03/2016
  3985                              <1> 	; 17/03/2016
  3986 0000B9B7 B40F                <1> 	mov	ah, 0Fh
  3987 0000B9B9 E8425DFFFF          <1> 	call	_int10h
  3988                              <1> 	; 13/05/2016
  3989 0000B9BE 883D[41830100]      <1> 	mov	[csftdf_videopage], bh ; active video page
  3990 0000B9C4 B403                <1> 	mov	ah, 03h
  3991 0000B9C6 E8355DFFFF          <1> 	call	_int10h
  3992 0000B9CB 668915[42830100]    <1> 	mov	[csftdf_cursorpos], dx
  3993                              <1> 
  3994 0000B9D2 29C0                <1> 	sub	eax, eax
  3995 0000B9D4 A2[19830100]        <1> 	mov	[csftdf_rw_err], al ; 0 
  3996                              <1> 
  3997                              <1> ; ///
  3998                              <1> csftdf_sf_amb: ; 15/03/2016
  3999 0000B9D9 8B0D[1C830100]      <1> 	mov	ecx, [csftdf_filesize]	; 23/03/2016
  4000                              <1> 
  4001                              <1> 	; TRDOS 386 (TRDOS v2.0)
  4002                              <1> 	; Allocate contiguous memory block for loading the file
  4003                              <1> 	
  4004                              <1> 	;mov	ecx, [SourceFile_DirEntry+DirEntry_FileSize]
  4005                              <1> 	
  4006                              <1> 	;sub	eax, eax ; First free memory aperture
  4007                              <1> 	
  4008                              <1> 	; eax = 0 (Allocate memory from the beginning)
  4009                              <1> 	; ecx = File (Allocation) size in bytes
  4010                              <1> 	
  4011 0000B9DF E822A2FFFF          <1> 	call	allocate_memory_block
  4012 0000B9E4 7304                <1> 	jnc	short loc_check_sf_save_loading_parms
  4013                              <1> 
  4014 0000B9E6 29C0                <1> 	sub	eax, eax
  4015 0000B9E8 29C9                <1> 	sub	ecx, ecx
  4016                              <1> 	
  4017                              <1> loc_check_sf_save_loading_parms:
  4018 0000B9EA A3[20830100]        <1> 	mov	[csftdf_sf_mem_addr], eax ; loading address
  4019 0000B9EF 890D[24830100]      <1> 	mov	[csftdf_sf_mem_bsize], ecx ; block size
  4020                              <1> ; ///   
  4021                              <1> 	; 19/03/2016
  4022 0000B9F5 8B35[44830100]      <1> 	mov	esi, [csftdf_sf_drv_dt] ; logical dos drv desc. tbl.
  4023                              <1> 
  4024                              <1> 	; 17/03/2016
  4025 0000B9FB 09C0                <1> 	or	eax, eax ; contiguous free memory block address 
  4026                              <1> 	;jz	csftdf2_read_sf_cluster
  4027                              <1> 	; 29/07/2022
  4028 0000B9FD 7505                <1> 	jnz	short csftdf2_1
  4029 0000B9FF E95E010000          <1> 	jmp	csftdf2_read_sf_cluster
  4030                              <1> 
  4031                              <1> csftdf2_1:
  4032                              <1> 	; 18/03/2016
  4033 0000BA04 8B1D[20830100]      <1> 	mov	ebx, [csftdf_sf_mem_addr] ; memory block address
  4034                              <1> 
  4035 0000BA0A 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
  4036                              <1>         ;jna	csftdf2_load_fs_file
  4037                              <1> 	; 29/07/2022
  4038 0000BA0E 7705                <1> 	ja	short csftdf2_load_fat_file
  4039 0000BA10 E900020000          <1> 	jmp	csftdf2_load_fs_file
  4040                              <1> 
  4041                              <1> csftdf2_load_fat_file:
  4042 0000BA15 53                  <1> 	push	ebx ; *
  4043                              <1> 
  4044                              <1> csftdf2_load_fat_file_next:
  4045 0000BA16 BE[17360100]        <1> 	mov	esi, msg_reading
  4046 0000BA1B E88AB2FFFF          <1> 	call	print_msg
  4047                              <1> 
  4048 0000BA20 803D[40830100]00    <1> 	cmp	byte [csftdf_percentage], 0
  4049 0000BA27 7605                <1> 	jna	short csftdf2_load_fat_file_1
  4050                              <1> 	
  4051 0000BA29 E87E000000          <1> 	call	csftdf2_print_percentage ; 19/03/2016
  4052                              <1> 
  4053                              <1> csftdf2_load_fat_file_1:
  4054 0000BA2E 8B35[44830100]      <1> 	mov	esi, [csftdf_sf_drv_dt]	
  4055 0000BA34 5B                  <1> 	pop	ebx ; *
  4056                              <1> 
  4057                              <1> csftdf2_load_fat_file_2:
  4058 0000BA35 E8BA000000          <1> 	call	csftdf2_read_fat_file_sectors ; 19/03/2016
  4059                              <1> 	;jc	csftdf2_rw_error ; eocc! or disk error! 
  4060                              <1> 	; 29/07/2022
  4061 0000BA3A 7305                <1> 	jnc	short csftdf2_load_fat_file_3 
  4062 0000BA3C E94D040000          <1> 	jmp	csftdf2_rw_error
  4063                              <1> csftdf2_load_fat_file_3:
  4064 0000BA41 09D2                <1> 	or	edx, edx ; edx > 0 -> EOF
  4065 0000BA43 7520                <1> 	jnz	short csftdf2_load_fat_file_ok
  4066                              <1> 
  4067 0000BA45 803D[40830100]00    <1> 	cmp	byte [csftdf_percentage], 0
  4068 0000BA4C 76E7                <1> 	jna	short csftdf2_load_fat_file_2
  4069                              <1> 
  4070 0000BA4E 53                  <1> 	push	ebx ; *	
  4071                              <1> 
  4072                              <1> 	; Set cursor position
  4073                              <1> 	; AH= 02h, BH= Page Number, DH= Row, DL= Column
  4074 0000BA4F 8A3D[41830100]      <1> 	mov	bh, [csftdf_videopage]
  4075 0000BA55 668B15[42830100]    <1> 	mov	dx, [csftdf_cursorpos]
  4076 0000BA5C B402                <1> 	mov	ah, 2
  4077 0000BA5E E89D5CFFFF          <1> 	call	_int10h
  4078 0000BA63 EBB1                <1> 	jmp	short csftdf2_load_fat_file_next
  4079                              <1> 	
  4080                              <1> csftdf2_load_fat_file_ok:
  4081 0000BA65 803D[40830100]00    <1> 	cmp	byte [csftdf_percentage], 0
  4082                              <1> 	;jna	csftdf2_save_file ; 25/03/2016
  4083                              <1> 	; 29/07/2022
  4084 0000BA6C 7705                <1> 	ja	short csftdf2_2
  4085 0000BA6E E94B020000          <1> 	jmp	csftdf2_save_file
  4086                              <1> csftdf2_2:	
  4087                              <1> 	; "Reading... 100%"
  4088 0000BA73 BF[2F360100]        <1> 	mov	edi, percentagestr
  4089 0000BA78 B031                <1> 	mov	al, '1'
  4090 0000BA7A AA                  <1> 	stosb
  4091 0000BA7B B030                <1> 	mov	al, '0'
  4092 0000BA7D AA                  <1> 	stosb
  4093 0000BA7E AA                  <1> 	stosb
  4094                              <1> 
  4095 0000BA7F 8A3D[41830100]      <1> 	mov	bh, [csftdf_videopage]
  4096 0000BA85 668B15[42830100]    <1> 	mov	dx, [csftdf_cursorpos]
  4097 0000BA8C B402                <1> 	mov	ah, 2
  4098 0000BA8E E86D5CFFFF          <1> 	call	_int10h
  4099                              <1> 
  4100 0000BA93 BE[17360100]        <1> 	mov	esi, msg_reading
  4101 0000BA98 E80DB2FFFF          <1> 	call	print_msg
  4102                              <1> 	
  4103 0000BA9D BE[2F360100]        <1> 	mov	esi, percentagestr
  4104 0000BAA2 E803B2FFFF          <1> 	call	print_msg
  4105                              <1> 
  4106 0000BAA7 E912020000          <1>         jmp     csftdf2_save_file ; 25/03/2016
  4107                              <1> 
  4108                              <1> csftdf2_print_percentage:
  4109                              <1> 	; 09/12/2017
  4110                              <1> 	; 19/03/2016
  4111                              <1> 	; 18/03/2016
  4112 0000BAAC B020                <1> 	mov	al, 20h
  4113 0000BAAE BF[2F360100]        <1> 	mov	edi, percentagestr
  4114 0000BAB3 AA                  <1> 	stosb
  4115 0000BAB4 AA                  <1> 	stosb
  4116 0000BAB5 A1[38830100]        <1> 	mov	eax, [csftdf_sf_rbytes]
  4117                              <1> 	;mov	edx, 100
  4118                              <1> 	; 29/07/2022
  4119 0000BABA 29D2                <1> 	sub	edx, edx
  4120 0000BABC B264                <1> 	mov	dl, 100
  4121 0000BABE F7E2                <1> 	mul	edx
  4122 0000BAC0 8B0D[1C830100]      <1> 	mov	ecx, [csftdf_filesize]	
  4123 0000BAC6 F7F1                <1> 	div	ecx
  4124 0000BAC8 B10A                <1> 	mov	cl, 10
  4125 0000BACA F6F1                <1> 	div	cl
  4126 0000BACC 80C430              <1> 	add	ah, '0'
  4127 0000BACF 8827                <1> 	mov	[edi], ah
  4128 0000BAD1 20C0                <1> 	and	al, al
  4129 0000BAD3 740A                <1> 	jz	short csftdf2_print_percent_1
  4130 0000BAD5 4F                  <1> 	dec	edi
  4131                              <1> 	;cbw
  4132 0000BAD6 28E4                <1> 	sub	ah, ah ; 09/12/2017
  4133 0000BAD8 F6F1                <1> 	div	cl
  4134 0000BADA 80C430              <1> 	add	ah, '0'
  4135 0000BADD 8827                <1> 	mov	[edi], ah
  4136                              <1> 	;and	al, al
  4137                              <1> 	;jz	short csftdf2_print_percent_1
  4138                              <1> 	;dec	edi
  4139                              <1> 	;mov	[edi], '1' ; 100%		
  4140                              <1> 
  4141                              <1> csftdf2_print_percent_1:
  4142 0000BADF BE[2F360100]        <1> 	mov	esi, percentagestr
  4143                              <1> 	;call	print_msg
  4144                              <1> 	;retn
  4145 0000BAE4 E9C1B1FFFF          <1> 	jmp	print_msg
  4146                              <1> 
  4147                              <1> csftdf2_read_file_sectors:
  4148                              <1> 	; 19/03/2016
  4149 0000BAE9 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
  4150                              <1> 	;jna	csftdf2_read_fs_file_sectors
  4151                              <1> 	; 29/07/2022
  4152 0000BAED 7705                <1> 	ja	short csftdf2_read_fat_file_sectors
  4153 0000BAEF E912070000          <1> 	jmp	csftdf2_read_fs_file_sectors
  4154                              <1> 
  4155                              <1> csftdf2_read_fat_file_sectors:
  4156                              <1> 	; 19/03/2016
  4157                              <1> 	; 18/03/2016
  4158                              <1> 	; return:
  4159                              <1> 	;   CF = 0 & EDX > 0 -> END OF FILE
  4160                              <1> 	;   CF = 0 & EDX = 0 -> not EOF
  4161                              <1> 	;   CF = 1 -> read error (error code in AL)	
  4162                              <1> 
  4163                              <1> csftdf2_read_fat_file_secs_0:
  4164 0000BAF4 8B15[1C830100]      <1> 	mov	edx, [csftdf_filesize]
  4165 0000BAFA 2B15[38830100]      <1> 	sub	edx, [csftdf_sf_rbytes]
  4166 0000BB00 3B15[30830100]      <1> 	cmp	edx, [csftdf_r_size]	
  4167 0000BB06 7306                <1> 	jnb	short csftdf2_read_fat_file_secs_1
  4168 0000BB08 8915[30830100]      <1> 	mov	[csftdf_r_size], edx
  4169                              <1> 		
  4170                              <1> csftdf2_read_fat_file_secs_1:
  4171 0000BB0E A1[30830100]        <1> 	mov	eax, [csftdf_r_size]
  4172 0000BB13 29D2                <1> 	sub	edx, edx
  4173 0000BB15 0FB74E11            <1> 	movzx	ecx, word [esi+LD_BPB+BytesPerSec]
  4174 0000BB19 01C8                <1> 	add	eax, ecx
  4175 0000BB1B 48                  <1> 	dec	eax
  4176 0000BB1C F7F1                <1> 	div	ecx
  4177 0000BB1E 89C1                <1> 	mov	ecx, eax ; sector count
  4178 0000BB20 A1[28830100]        <1> 	mov	eax, [csftdf_sf_cluster]
  4179                              <1> 
  4180                              <1> 	; EBX = memory block address (current)
  4181                              <1> 	
  4182 0000BB25 E8DD080000          <1> 	call	read_fat_file_sectors
  4183 0000BB2A 7235                <1> 	jc	short csftdf2_read_fat_file_secs_3
  4184                              <1> 
  4185                              <1> 	; EBX = next memory address
  4186                              <1> 
  4187 0000BB2C A1[38830100]        <1> 	mov	eax, [csftdf_sf_rbytes]
  4188 0000BB31 0305[30830100]      <1> 	add	eax, [csftdf_r_size]
  4189 0000BB37 8B15[1C830100]      <1> 	mov	edx, [csftdf_filesize]
  4190 0000BB3D 39D0                <1> 	cmp	eax, edx
  4191 0000BB3F 7320                <1> 	jnb	short csftdf2_read_fat_file_secs_3 ; edx > 0
  4192 0000BB41 A3[38830100]        <1> 	mov	[csftdf_sf_rbytes], eax
  4193                              <1> 
  4194 0000BB46 53                  <1> 	push	ebx ; *
  4195                              <1> 	; get next cluster (csftdf_r_size! bytes)
  4196 0000BB47 A1[28830100]        <1> 	mov	eax, [csftdf_sf_cluster]
  4197 0000BB4C E8B6060000          <1> 	call	get_next_cluster
  4198 0000BB51 5B                  <1> 	pop	ebx ; *
  4199 0000BB52 7306                <1> 	jnc	short csftdf2_read_fat_file_secs_2
  4200                              <1> 
  4201                              <1> 	; 15/10/2016
  4202                              <1> 	;Disk read error instad of drv not ready err
  4203 0000BB54 B811000000          <1> 	mov	eax, 17 ; Read error !
  4204 0000BB59 C3                  <1> 	retn
  4205                              <1> 
  4206                              <1> csftdf2_read_fat_file_secs_2:
  4207 0000BB5A 29D2                <1> 	sub	edx, edx ; 0
  4208 0000BB5C A3[28830100]        <1> 	mov	[csftdf_sf_cluster], eax ; next cluster
  4209                              <1> 
  4210                              <1> csftdf2_read_fat_file_secs_3:
  4211 0000BB61 C3                  <1> 	retn
  4212                              <1> 
  4213                              <1> csftdf2_read_sf_cluster:
  4214                              <1> 	; 19/03/2016
  4215 0000BB62 BB00000700          <1> 	mov	ebx, Cluster_Buffer ; buffer address (64KB)
  4216                              <1> 
  4217 0000BB67 803D[40830100]00    <1> 	cmp	byte [csftdf_percentage], 0
  4218 0000BB6E 760D                <1> 	jna	short csftdf2_read_sf_clust_2
  4219                              <1> 
  4220 0000BB70 53                  <1> 	push	ebx ; *	
  4221                              <1> 
  4222                              <1> csftdf2_read_sf_clust_next:
  4223 0000BB71 E836FFFFFF          <1> 	call	csftdf2_print_percentage
  4224                              <1> 
  4225                              <1> csftdf2_read_sf_clust_0:
  4226 0000BB76 8B35[44830100]      <1> 	mov	esi, [csftdf_sf_drv_dt]	
  4227                              <1> csftdf2_read_sf_clust_1:
  4228 0000BB7C 5B                  <1> 	pop	ebx ; *
  4229                              <1> 
  4230                              <1> csftdf2_read_sf_clust_2:
  4231 0000BB7D 89DA                <1> 	mov	edx, ebx
  4232 0000BB7F 0315[30830100]      <1> 	add	edx, [csftdf_r_size]
  4233 0000BB85 81FA00000800        <1> 	cmp	edx, Cluster_Buffer + 65536
  4234 0000BB8B 772B                <1> 	ja	short csftdf2_write_df_cluster
  4235                              <1> 
  4236 0000BB8D E857FFFFFF          <1> 	call	csftdf2_read_file_sectors ; 19/03/2016
  4237                              <1> 	;jc	csftdf2_save_fat_file_err2 ; eocc! or disk error! 
  4238                              <1> 	; 29/07/2022
  4239 0000BB92 7236                <1> 	jc	short csftdf2_3
  4240                              <1> 
  4241 0000BB94 09D2                <1> 	or	edx, edx ; edx > 0 -> EOF
  4242 0000BB96 7520                <1> 	jnz	short csftdf2_write_df_cluster
  4243                              <1> 
  4244 0000BB98 803D[40830100]00    <1> 	cmp	byte [csftdf_percentage], 0
  4245 0000BB9F 76DC                <1> 	jna	short csftdf2_read_sf_clust_2
  4246                              <1> 
  4247 0000BBA1 53                  <1> 	push	ebx ; *	
  4248                              <1> 
  4249                              <1> 	; Set cursor position
  4250                              <1> 	; AH= 02h, BH= Page Number, DH= Row, DL= Column
  4251 0000BBA2 8A3D[41830100]      <1> 	mov	bh, [csftdf_videopage]
  4252 0000BBA8 668B15[42830100]    <1> 	mov	dx, [csftdf_cursorpos]
  4253 0000BBAF B402                <1> 	mov	ah, 2
  4254 0000BBB1 E84A5BFFFF          <1> 	call	_int10h
  4255 0000BBB6 EBB9                <1> 	jmp	short csftdf2_read_sf_clust_next
  4256                              <1> 
  4257                              <1> csftdf2_write_df_cluster:
  4258                              <1> 	; 19/03/2016
  4259 0000BBB8 8B35[48830100]      <1> 	mov	esi, [csftdf_df_drv_dt]	
  4260 0000BBBE BB00000700          <1> 	mov	ebx, Cluster_Buffer ; buffer address (64KB)
  4261                              <1> 
  4262                              <1> csftdf2_write_df_clust_next:
  4263 0000BBC3 E852000000          <1> 	call	csftdf2_write_file_sectors ; 19/03/2016
  4264                              <1> 	;jc	csftdf2_save_fat_file_err2 ; eocc! or disk error! 
  4265                              <1> 	; 29/07/2022
  4266 0000BBC8 7305                <1> 	jnc	short csftdf2_4
  4267                              <1> csftdf2_3:
  4268 0000BBCA E946020000          <1> 	jmp	csftdf2_save_fat_file_err2
  4269                              <1> csftdf2_4:
  4270 0000BBCF 09D2                <1> 	or	edx, edx ; edx > 0 -> EOF
  4271 0000BBD1 750A                <1> 	jnz	short csftdf2_rw_f_clust_ok
  4272                              <1> 
  4273 0000BBD3 81FB00000800        <1> 	cmp	ebx, Cluster_Buffer + 65536
  4274 0000BBD9 72E8                <1> 	jb	short csftdf2_write_df_clust_next
  4275                              <1> 	
  4276 0000BBDB EB85                <1> 	jmp	short csftdf2_read_sf_cluster
  4277                              <1>  
  4278                              <1> csftdf2_rw_f_clust_ok:
  4279 0000BBDD 803D[40830100]00    <1> 	cmp	byte [csftdf_percentage], 0
  4280                              <1> 	;jna	csftdf2_save_fat_file_4 ; 25/03/2016
  4281                              <1> 	; 29/07/2022
  4282 0000BBE4 762A                <1> 	jna	short csftdf2_5
  4283                              <1> 
  4284                              <1> 	; "100%"
  4285 0000BBE6 BF[2F360100]        <1> 	mov	edi, percentagestr
  4286 0000BBEB B031                <1> 	mov	al, '1'
  4287 0000BBED AA                  <1> 	stosb
  4288 0000BBEE B030                <1> 	mov	al, '0'
  4289 0000BBF0 AA                  <1> 	stosb
  4290 0000BBF1 AA                  <1> 	stosb
  4291                              <1> 
  4292 0000BBF2 8A3D[41830100]      <1> 	mov	bh, [csftdf_videopage]
  4293 0000BBF8 668B15[42830100]    <1> 	mov	dx, [csftdf_cursorpos]
  4294 0000BBFF B402                <1> 	mov	ah, 2
  4295 0000BC01 E8FA5AFFFF          <1> 	call	_int10h
  4296                              <1> 
  4297 0000BC06 BE[2F360100]        <1> 	mov	esi, percentagestr
  4298 0000BC0B E89AB0FFFF          <1> 	call	print_msg
  4299                              <1> csftdf2_5:
  4300 0000BC10 E987010000          <1>         jmp     csftdf2_save_fat_file_4
  4301                              <1> 
  4302                              <1> csftdf2_load_fs_file:
  4303                              <1> 	; temporary - 18/03/2016
  4304 0000BC15 E972020000          <1>         jmp     csftdf2_read_error
  4305                              <1> 
  4306                              <1> csftdf2_write_file_sectors:
  4307                              <1> 	; 19/03/2016
  4308 0000BC1A 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
  4309                              <1> 	;jna	csftdf2_write_fs_file_sectors
  4310                              <1> 	; 29/07/2022
  4311 0000BC1E 7705                <1> 	ja	short csftdf2_write_fat_file_sectors
  4312 0000BC20 E9E1050000          <1> 	jmp	csftdf2_write_fs_file_sectors
  4313                              <1> 
  4314                              <1> csftdf2_write_fat_file_sectors:
  4315                              <1> 	; 19/03/2016
  4316                              <1> 	; 18/03/2016
  4317                              <1> 	; return:
  4318                              <1> 	;   CF = 0 & EDX > 0 -> END OF FILE
  4319                              <1> 	;   CF = 0 & EDX = 0 -> not EOF
  4320                              <1> 	;   CF = 1 -> write error (error code in AL)	
  4321                              <1> 
  4322                              <1> csftdf2_write_fat_file_secs_0:
  4323 0000BC25 8B15[1C830100]      <1> 	mov	edx, [csftdf_filesize]
  4324 0000BC2B 2B15[3C830100]      <1> 	sub	edx, [csftdf_df_wbytes]
  4325 0000BC31 3B15[34830100]      <1> 	cmp	edx, [csftdf_w_size]	
  4326 0000BC37 7306                <1> 	jnb	short csftdf2_write_fat_file_secs_1
  4327 0000BC39 8915[34830100]      <1> 	mov	[csftdf_w_size], edx		
  4328                              <1> 
  4329                              <1> csftdf2_write_fat_file_secs_1:
  4330 0000BC3F A1[34830100]        <1> 	mov	eax, [csftdf_w_size]
  4331 0000BC44 29D2                <1> 	sub	edx, edx
  4332 0000BC46 0FB74E11            <1> 	movzx	ecx, word [esi+LD_BPB+BytesPerSec]
  4333 0000BC4A 01C8                <1> 	add	eax, ecx
  4334 0000BC4C 48                  <1> 	dec	eax
  4335 0000BC4D F7F1                <1> 	div	ecx
  4336 0000BC4F 89C1                <1> 	mov	ecx, eax ; sector count
  4337 0000BC51 A1[2C830100]        <1> 	mov	eax, [csftdf_df_cluster]
  4338                              <1> 
  4339                              <1> 	; EBX = memory block address (current)	
  4340                              <1> 
  4341 0000BC56 E80A0F0000          <1> 	call	write_fat_file_sectors
  4342 0000BC5B 7259                <1> 	jc	short csftdf2_write_fat_file_secs_4
  4343                              <1> 
  4344                              <1> 	; EBX = next memory address
  4345                              <1> 
  4346 0000BC5D A1[3C830100]        <1> 	mov	eax, [csftdf_df_wbytes]
  4347 0000BC62 0305[34830100]      <1> 	add	eax, [csftdf_w_size]
  4348 0000BC68 8B15[1C830100]      <1> 	mov	edx, [csftdf_filesize]
  4349 0000BC6E 39D0                <1> 	cmp	eax, edx
  4350 0000BC70 7344                <1> 	jnb	short csftdf2_write_fat_file_secs_4
  4351 0000BC72 A3[3C830100]        <1> 	mov	[csftdf_df_wbytes], eax
  4352                              <1> 	;
  4353 0000BC77 A3[DE820100]        <1> 	mov	[DestinationFile_DirEntry+DirEntry_FileSize], eax
  4354                              <1> 
  4355 0000BC7C 53                  <1> 	push	ebx ; *
  4356                              <1> 
  4357 0000BC7D 803D[1A830100]01    <1> 	cmp	byte [DestinationFileFound], 1
  4358 0000BC84 7210                <1> 	jb	short csftdf2_write_fat_file_secs_2
  4359                              <1> 
  4360                              <1> 	; get next cluster (csftdf_w_size! bytes)
  4361 0000BC86 A1[2C830100]        <1> 	mov	eax, [csftdf_df_cluster]
  4362 0000BC8B E877050000          <1> 	call	get_next_cluster
  4363 0000BC90 731C                <1> 	jnc	short csftdf2_write_fat_file_secs_3
  4364                              <1> 
  4365 0000BC92 21C0                <1> 	and	eax, eax ; end of cluster chain!?
  4366 0000BC94 7521                <1> 	jnz	short csftdf2_write_fat_file_secs_5 ; disk error !
  4367                              <1> 
  4368                              <1> csftdf2_write_fat_file_secs_2:
  4369 0000BC96 A1[2C830100]        <1> 	mov	eax, [csftdf_df_cluster] ; last cluster
  4370 0000BC9B E8F30D0000          <1> 	call	add_new_cluster		
  4371 0000BCA0 7215                <1> 	jc	short csftdf2_write_fat_file_secs_5
  4372                              <1> 
  4373                              <1> 	; NOTE: Destination file size may be bigger than
  4374                              <1> 	; source file size when the last reading fails after here.
  4375                              <1> 	; (The last -empty- cluster of destination file must be 
  4376                              <1> 	; truncated and LMDT must be current date&time for partial
  4377                              <1> 	; copy result!) 
  4378 0000BCA2 8B15[34830100]      <1> 	mov	edx, [csftdf_w_size] ; bytes per cluster
  4379 0000BCA8 0115[DE820100]      <1> 	add	[DestinationFile_DirEntry+DirEntry_FileSize], edx
  4380                              <1> 
  4381                              <1> csftdf2_write_fat_file_secs_3:
  4382 0000BCAE 5B                  <1> 	pop	ebx ; *
  4383 0000BCAF 29D2                <1> 	sub	edx, edx ; 0
  4384 0000BCB1 A3[2C830100]        <1> 	mov	[csftdf_df_cluster], eax ; next cluster
  4385                              <1> 
  4386                              <1> csftdf2_write_fat_file_secs_4:
  4387 0000BCB6 C3                  <1> 	retn
  4388                              <1> 
  4389                              <1> csftdf2_write_fat_file_secs_5:
  4390 0000BCB7 5B                  <1> 	pop	ebx ; *
  4391                              <1> 	; 16/10/2016 (1Dh -> 18)
  4392 0000BCB8 B812000000          <1> 	mov	eax, 18 ; Write error !
  4393 0000BCBD C3                  <1> 	retn
  4394                              <1> 
  4395                              <1> csftdf2_save_file:
  4396                              <1> 	; 09/12/2017
  4397                              <1> 	; 25/03/2016
  4398                              <1> 	; 19/03/2016
  4399                              <1> 	; 18/03/2016
  4400 0000BCBE 8B35[48830100]      <1> 	mov	esi, [csftdf_df_drv_dt] ; logical dos drv desc. tbl.
  4401                              <1> 
  4402 0000BCC4 8B1D[20830100]      <1> 	mov	ebx, [csftdf_sf_mem_addr] ; memory block address
  4403                              <1> 
  4404 0000BCCA 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
  4405                              <1> 	;jna	csftdf2_save_fs_file
  4406                              <1> 	; 29/07/2022	
  4407 0000BCCE 7705                <1> 	ja	short csftdf2_save_fat_file
  4408 0000BCD0 E9F5010000          <1> 	jmp	csftdf2_save_fs_file
  4409                              <1> 
  4410                              <1> csftdf2_save_fat_file:
  4411 0000BCD5 53                  <1> 	push	ebx; *
  4412                              <1> 
  4413 0000BCD6 803D[40830100]00    <1> 	cmp	byte [csftdf_percentage], 0
  4414 0000BCDD 7724                <1> 	ja	short csftdf2_save_fat_file_0
  4415                              <1> 
  4416                              <1> 	; Set cursor position
  4417                              <1> 	; AH= 02h, BH= Page Number, DH= Row, DL= Column
  4418 0000BCDF 8A3D[41830100]      <1> 	mov	bh, [csftdf_videopage]
  4419 0000BCE5 668B15[42830100]    <1> 	mov	dx, [csftdf_cursorpos]
  4420 0000BCEC B402                <1> 	mov	ah, 2
  4421 0000BCEE E80D5AFFFF          <1> 	call	_int10h
  4422                              <1> 	
  4423 0000BCF3 BE[23360100]        <1> 	mov	esi, msg_writing
  4424 0000BCF8 E8ADAFFFFF          <1> 	call	print_msg
  4425                              <1> 
  4426                              <1> csftdf2_save_fat_file_next:
  4427 0000BCFD 8B35[48830100]      <1> 	mov	esi, [csftdf_df_drv_dt] ; 25/03/2016
  4428                              <1> 
  4429                              <1> csftdf2_save_fat_file_0:
  4430 0000BD03 5B                  <1> 	pop	ebx ; *
  4431                              <1> 
  4432                              <1> csftdf2_save_fat_file_1:
  4433 0000BD04 E811FFFFFF          <1> 	call	csftdf2_write_file_sectors ; 19/03/2016	
  4434                              <1> 	;jc	csftdf2_rw_error ; eocc! or disk error! 
  4435                              <1> 	; 29/07/2022
  4436 0000BD09 7305                <1> 	jnc	short csftdf2_6
  4437 0000BD0B E97E010000          <1> 	jmp	csftdf2_rw_error
  4438                              <1> 
  4439                              <1> csftdf2_6:
  4440 0000BD10 09D2                <1> 	or	edx, edx ; edx > 0 -> EOF
  4441 0000BD12 756C                <1>         jnz     short csftdf2_save_fat_file_3 ; 25/03/2016
  4442                              <1> 
  4443 0000BD14 803D[40830100]00    <1> 	cmp	byte [csftdf_percentage], 0
  4444 0000BD1B 76E7                <1> 	jna	short csftdf2_save_fat_file_1
  4445                              <1> 
  4446 0000BD1D B020                <1> 	mov	al, 20h
  4447 0000BD1F BF[2F360100]        <1> 	mov	edi, percentagestr
  4448 0000BD24 AA                  <1> 	stosb
  4449 0000BD25 AA                  <1> 	stosb
  4450 0000BD26 A1[3C830100]        <1> 	mov	eax, [csftdf_df_wbytes]
  4451                              <1> 	;mov	edx, 100
  4452                              <1> 	; 29/07/2022
  4453 0000BD2B 31D2                <1> 	xor	edx, edx
  4454 0000BD2D B264                <1> 	mov	dl, 100
  4455 0000BD2F F7E2                <1> 	mul	edx
  4456 0000BD31 8B0D[1C830100]      <1> 	mov	ecx, [csftdf_filesize]	
  4457 0000BD37 F7F1                <1> 	div	ecx
  4458 0000BD39 B10A                <1> 	mov	cl, 10
  4459 0000BD3B F6F1                <1> 	div	cl
  4460 0000BD3D 80C430              <1> 	add	ah, '0'
  4461 0000BD40 8827                <1> 	mov	[edi], ah
  4462 0000BD42 20C0                <1> 	and	al, al
  4463 0000BD44 740A                <1> 	jz	short csftdf2_save_fat_file_2
  4464 0000BD46 4F                  <1> 	dec	edi
  4465                              <1> 	;cbw
  4466 0000BD47 30E4                <1> 	xor	ah, ah ; 09/12/2017
  4467 0000BD49 F6F1                <1> 	div	cl
  4468 0000BD4B 80C430              <1> 	add	ah, '0'
  4469 0000BD4E 8827                <1> 	mov	[edi], ah
  4470                              <1> 	;and	al, al
  4471                              <1> 	;jz	short csftdf2_save_fat_file_2
  4472                              <1> 	;dec	edi
  4473                              <1> 	;mov	[edi], '1' ; 100%		
  4474                              <1> 
  4475                              <1> csftdf2_save_fat_file_2:
  4476 0000BD50 53                  <1> 	push	ebx ; *
  4477                              <1> 
  4478 0000BD51 E802000000          <1> 	call	csftdf2_print_wr_percentage ; 25/03/2016
  4479                              <1> 
  4480 0000BD56 EBA5                <1>         jmp     csftdf2_save_fat_file_next
  4481                              <1> 
  4482                              <1> csftdf2_print_wr_percentage:
  4483                              <1> 	; Set cursor position
  4484                              <1> 	; AH= 02h, BH= Page Number, DH= Row, DL= Column
  4485 0000BD58 8A3D[41830100]      <1> 	mov	bh, [csftdf_videopage]
  4486 0000BD5E 668B15[42830100]    <1> 	mov	dx, [csftdf_cursorpos]
  4487 0000BD65 B402                <1> 	mov	ah, 2
  4488 0000BD67 E89459FFFF          <1> 	call	_int10h
  4489                              <1> 
  4490 0000BD6C BE[23360100]        <1> 	mov	esi, msg_writing
  4491 0000BD71 E834AFFFFF          <1> 	call	print_msg
  4492                              <1> 
  4493 0000BD76 BE[2F360100]        <1> 	mov	esi, percentagestr
  4494                              <1> 	;call	print_msg
  4495                              <1> 	;retn
  4496 0000BD7B E92AAFFFFF          <1> 	jmp	print_msg
  4497                              <1> 
  4498                              <1> csftdf2_save_fat_file_3:
  4499 0000BD80 803D[40830100]00    <1> 	cmp	byte [csftdf_percentage], 0
  4500                              <1>         ;jna	csftdf2_save_fat_file_4 ; 25/03/2016
  4501                              <1> 	; 29/07/2022
  4502 0000BD87 7702                <1> 	ja	short csftdf2_7
  4503 0000BD89 EB11                <1> 	jmp	csftdf2_save_fat_file_4
  4504                              <1> 
  4505                              <1> csftdf2_7:
  4506                              <1> 	; "100%"
  4507 0000BD8B BF[2F360100]        <1> 	mov	edi, percentagestr
  4508 0000BD90 B031                <1> 	mov	al, '1'
  4509 0000BD92 AA                  <1> 	stosb
  4510 0000BD93 B030                <1> 	mov	al, '0'
  4511 0000BD95 AA                  <1> 	stosb
  4512 0000BD96 AA                  <1> 	stosb
  4513                              <1> 
  4514 0000BD97 E8BCFFFFFF          <1> 	call	csftdf2_print_wr_percentage
  4515                              <1> 
  4516                              <1> csftdf2_save_fat_file_4:
  4517 0000BD9C 803D[1A830100]00    <1> 	cmp	byte [DestinationFileFound], 0
  4518 0000BDA3 7647                <1> 	jna	short csftdf2_save_fat_file_6
  4519                              <1> 
  4520 0000BDA5 8B35[48830100]      <1> 	mov	esi, [csftdf_df_drv_dt] ; 31/03/2016	
  4521                              <1> 
  4522 0000BDAB A1[2C830100]        <1> 	mov	eax, [csftdf_df_cluster] ; last cluster
  4523 0000BDB0 E852040000          <1> 	call	get_next_cluster
  4524 0000BDB5 7235                <1> 	jc	short csftdf2_save_fat_file_6 ; eocc! or disk error!
  4525                              <1> 
  4526 0000BDB7 A1[2C830100]        <1> 	mov	eax, [csftdf_df_cluster] ; last cluster
  4527                              <1> 	;xor	ecx, ecx
  4528                              <1> 	;mov	[FAT_ClusterCounter], ecx ; 0 ; reset
  4529                              <1> 	;dec	ecx ; 0FFFFFFFFh
  4530                              <1> 	;shr	ecx, 4 ; 28 bit ; 0FFFFFFFh
  4531 0000BDBC B9FFFFFF0F          <1> 	mov	ecx, 0FFFFFFFh
  4532 0000BDC1 E830070000          <1> 	call	update_cluster
  4533 0000BDC6 7224                <1> 	jc	short csftdf2_save_fat_file_6 ; really last cluster!?
  4534                              <1> 
  4535 0000BDC8 A3[2C830100]        <1> 	mov	[csftdf_df_cluster], eax ; next cluster
  4536                              <1> 	
  4537                              <1> 	; byte [FAT_BuffValidData] = 2 
  4538 0000BDCD E8A7090000          <1> 	call	save_fat_buffer
  4539 0000BDD2 730E                <1> 	jnc	short csftdf2_save_fat_file_5
  4540                              <1> 	
  4541 0000BDD4 8B15[1C830100]      <1> 	mov	edx, [csftdf_filesize]
  4542 0000BDDA 8915[DE820100]      <1> 	mov	[DestinationFile_DirEntry+DirEntry_FileSize], edx
  4543 0000BDE0 EB58                <1> 	jmp	short csftdf2_save_fat_file_err3
  4544                              <1> 
  4545                              <1> csftdf2_save_fat_file_5:
  4546 0000BDE2 A1[2C830100]        <1> 	mov	eax, [csftdf_df_cluster]
  4547                              <1> 
  4548                              <1> 	; EAX = First cluster to be truncated/unlinked
  4549                              <1> 	; ESI = Logical dos drive description table address
  4550 0000BDE7 E8CB0B0000          <1> 	call	truncate_cluster_chain
  4551                              <1> 
  4552                              <1> csftdf2_save_fat_file_6:
  4553                              <1> 	; 28/03/2016
  4554 0000BDEC BE[4D820100]        <1> 	mov	esi, SourceFile_DirEntry+DirEntry_Attr ; +11 to + 18
  4555 0000BDF1 BF[CD820100]        <1> 	mov	edi, DestinationFile_DirEntry+DirEntry_Attr ; +11 to + 18
  4556 0000BDF6 A4                  <1> 	movsb ; +11
  4557 0000BDF7 A5                  <1> 	movsd ; +12 .. +15
  4558 0000BDF8 66A5                <1> 	movsw ; +16 .. +17
  4559                              <1> 		; + 18
  4560 0000BDFA 83C604              <1> 	add	esi, 4
  4561 0000BDFD 83C704              <1> 	add	edi, 4
  4562 0000BE00 A5                  <1> 	movsd	; DirEntry_WrtTime ; +22 .. +25
  4563                              <1> 
  4564 0000BE01 8B15[1C830100]      <1> 	mov	edx, [csftdf_filesize]
  4565 0000BE07 8915[DE820100]      <1> 	mov	[DestinationFile_DirEntry+DirEntry_FileSize], edx
  4566                              <1> 
  4567 0000BE0D E8E9F0FFFF          <1> 	call	convert_current_date_time
  4568                              <1> 	; DX = Date in dos dir entry format
  4569                              <1> 	; AX = Time in dos dir entry format
  4570 0000BE12 EB4D                <1> 	jmp	short csftdf2_save_fat_file_7
  4571                              <1> 
  4572                              <1> csftdf2_save_fat_file_err1:
  4573 0000BE14 5B                  <1> 	pop	ebx ; *	
  4574                              <1> csftdf2_save_fat_file_err2:
  4575 0000BE15 A1[3C830100]        <1> 	mov	eax, [csftdf_df_wbytes]
  4576 0000BE1A 8B15[DE820100]      <1> 	mov	edx, [DestinationFile_DirEntry+DirEntry_FileSize]
  4577 0000BE20 39C2                <1> 	cmp	edx, eax
  4578 0000BE22 7616                <1> 	jna	short csftdf2_save_fat_file_err3
  4579 0000BE24 A1[2C830100]        <1> 	mov	eax, [csftdf_df_cluster] ; last (empty) cluster
  4580                              <1> 	; ESI = Logical dos drive description table address
  4581 0000BE29 E8890B0000          <1> 	call	truncate_cluster_chain
  4582 0000BE2E 720A                <1> 	jc	short csftdf2_save_fat_file_err3
  4583 0000BE30 A1[3C830100]        <1> 	mov	eax, [csftdf_df_wbytes]	
  4584 0000BE35 A3[DE820100]        <1> 	mov	[DestinationFile_DirEntry+DirEntry_FileSize], eax
  4585                              <1> csftdf2_save_fat_file_err3:
  4586 0000BE3A E8BCF0FFFF          <1> 	call	convert_current_date_time
  4587                              <1> 	; DX = Date in dos dir entry format
  4588                              <1> 	; AX = Time in dos dir entry format
  4589 0000BE3F C605[CF820100]00    <1> 	mov	byte [DestinationFile_DirEntry+DirEntry_CrtTimeTenth], 0
  4590 0000BE46 66A3[D0820100]      <1> 	mov	[DestinationFile_DirEntry+DirEntry_CrtTime], ax
  4591 0000BE4C 668915[D2820100]    <1> 	mov	[DestinationFile_DirEntry+DirEntry_CrtDate], dx		
  4592 0000BE53 66A3[D8820100]      <1> 	mov	[DestinationFile_DirEntry+DirEntry_WrtTime], ax
  4593 0000BE59 668915[DA820100]    <1> 	mov	[DestinationFile_DirEntry+DirEntry_WrtDate], dx
  4594 0000BE60 F9                  <1> 	stc
  4595                              <1> csftdf2_save_fat_file_7:
  4596 0000BE61 9C                  <1> 	pushf
  4597 0000BE62 668915[D4820100]    <1> 	mov	[DestinationFile_DirEntry+DirEntry_LastAccDate], dx
  4598 0000BE69 BE[C2820100]        <1> 	mov	esi, DestinationFile_DirEntry
  4599 0000BE6E BF00000800          <1> 	mov	edi, Directory_Buffer
  4600 0000BE73 0FB70D[EA820100]    <1> 	movzx	ecx, word [DestinationFile_DirEntryNumber] ; (<2048)
  4601                              <1> 	;shl	cx, 5 ; 32 * directory entry number
  4602                              <1> 	; 29/07/2022
  4603 0000BE7A C1E105              <1> 	shl	ecx, 5
  4604 0000BE7D 01CF                <1> 	add	edi, ecx
  4605                              <1> 	;mov	ecx, 8
  4606                              <1> 	;mov	cx, 8
  4607                              <1> 	; 29/07/2022
  4608                              <1> 	;sub	ecx, ecx
  4609 0000BE7F 28ED                <1> 	sub	ch, ch
  4610 0000BE81 B108                <1> 	mov	cl, 8
  4611 0000BE83 F3A5                <1> 	rep	movsd
  4612 0000BE85 9D                  <1> 	popf
  4613 0000BE86 730B                <1> 	jnc	short csftdf2_write_file_OK
  4614                              <1> 	 		
  4615                              <1> csftdf2_write_error:
  4616                              <1> 	; 18/03/2016
  4617 0000BE88 B01D                <1> 	mov	al, 1Dh ; write error
  4618 0000BE8A EB02                <1> 	jmp	short csftdf2_rw_error
  4619                              <1> 
  4620                              <1> 	; 16/03/2016
  4621                              <1> csftdf2_read_error:
  4622 0000BE8C B011                <1> 	mov	al, 17 ; ; Drive not ready or read error!
  4623                              <1> csftdf2_rw_error:
  4624 0000BE8E A2[19830100]        <1> 	mov	[csftdf_rw_err], al 
  4625                              <1> 
  4626                              <1> csftdf2_write_file_OK:
  4627                              <1> 	; 18/03/2016
  4628 0000BE93 C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2
  4629 0000BE9A E8F1F0FFFF          <1> 	call	save_directory_buffer
  4630                              <1> 
  4631                              <1>  	; Update last modification date&time of destination
  4632                              <1> 	; file's (parent) directory
  4633 0000BE9F E884F1FFFF          <1> 	call	update_parent_dir_lmdt
  4634                              <1> 	;
  4635 0000BEA4 A1[20830100]        <1> 	mov	eax, [csftdf_sf_mem_addr] ; start address
  4636                              <1> 
  4637 0000BEA9 21C0                <1> 	and	eax, eax
  4638 0000BEAB 750E                <1> 	jnz	short csftdf2_dealloc_mblock
  4639                              <1> 
  4640 0000BEAD 88C5                <1> 	mov	ch, al ; 0 (Cluster r/w, not full loading)
  4641                              <1> csftdf2_dealloc_retn:
  4642 0000BEAF 8A0D[19830100]      <1> 	mov	cl, [csftdf_rw_err]
  4643 0000BEB5 A1[2C830100]        <1> 	mov	eax, [csftdf_df_cluster]
  4644 0000BEBA C3                  <1> 	retn
  4645                              <1> 
  4646                              <1> csftdf2_dealloc_mblock:
  4647 0000BEBB 8B0D[24830100]      <1> 	mov	ecx, [csftdf_sf_mem_bsize] ; block size	
  4648 0000BEC1 E8609FFFFF          <1> 	call	deallocate_memory_block
  4649 0000BEC6 B5FF                <1>         mov     ch, 0FFh ; (File was full loaded at memory)
  4650 0000BEC8 EBE5                <1> 	jmp	short csftdf2_dealloc_retn
  4651                              <1> 
  4652                              <1> csftdf2_save_fs_file:
  4653                              <1> 	; 16/10/2016 (1Dh -> 18)
  4654                              <1> 	; temporary - (21/03/2016)
  4655                              <1> 	;mov	eax, 18 ; write error
  4656                              <1> 	; 29/07/2022
  4657 0000BECA 31C0                <1> 	xor	eax, eax
  4658 0000BECC B012                <1> 	mov	al, 18
  4659 0000BECE F9                  <1> 	stc
  4660 0000BECF C3                  <1> 	retn
  4661                              <1> 
  4662                              <1> create_file:
  4663                              <1> 	; 30/07/2022
  4664                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  4665                              <1> 	; 16/10/2016
  4666                              <1> 	; 24/03/2016, 31/03/2016
  4667                              <1> 	; 20/03/2016, 21/03/2016, 23/03/2016
  4668                              <1> 	; 19/03/2016 (TRDOS 396 = TRDOS v2.0)
  4669                              <1> 	; 03/09/2011 (FILE.ASM, 'proc_create_file')
  4670                              <1> 	; 09/08/2010
  4671                              <1> 	;
  4672                              <1> 	; INPUT ->
  4673                              <1> 	; 	EAX = File Size
  4674                              <1> 	; 	ESI = ASCIIZ File Name
  4675                              <1> 	; 	CL = File Attributes 
  4676                              <1> 	;	EBX = FFFFFFFFh -> create empty file 
  4677                              <1> 	;			 (only for FAT fs) 
  4678                              <1> 	; OUTPUT ->
  4679                              <1> 	;     CF = 0 ->
  4680                              <1> 	;	EAX = New file's first cluster
  4681                              <1> 	; 	ESI = Logical Dos Drv Descr. Table Addr.
  4682                              <1> 	; 	EBX = offset CreateFile_Size
  4683                              <1> 	; 	ECX = Sectors per cluster (<256) 
  4684                              <1> 	; 	EDX = Directory entry index/number (<65536)
  4685                              <1> 	;     CF = 1 -> error code in AL
  4686                              <1> 
  4687                              <1> ;	test	cl, 18h (directory or volume name)
  4688                              <1> ;	jnz	short loc_createfile_access_denied
  4689 0000BED0 80E107              <1> 	and	cl, 07h ; S, H, R
  4690 0000BED3 880D[68830100]      <1>         mov     [createfile_attrib], cl 
  4691                              <1> 
  4692 0000BED9 89D9                <1> 	mov	ecx, ebx
  4693 0000BEDB 89F3                <1> 	mov	ebx, esi ; ASCIIZ File Name address
  4694 0000BEDD 29D2                <1> 	sub	edx, edx
  4695 0000BEDF 8A35[0A780100]      <1>         mov     dh, [Current_Drv]
  4696 0000BEE5 BE00010900          <1>         mov     esi, Logical_DOSDisks
  4697 0000BEEA 01D6                <1> 	add	esi, edx
  4698                              <1> 
  4699 0000BEEC 8815[73830100]      <1> 	mov	[createfile_UpdatePDir], dl ; 0 ; 31/03/2016 
  4700                              <1> 
  4701                              <1> 	; LD_DiskType = 0 for write protection (read only) 
  4702 0000BEF2 807E0101            <1> 	cmp	byte [esi+LD_DiskType], 1 ; 0 = Invalid
  4703 0000BEF6 7308                <1> 	jnb	short loc_createfile_check_file_sytem
  4704                              <1> 	; 16/10/2016 (TRDOS Error code: 30, disk write protected) 
  4705                              <1> 	;mov	eax, 30 ; 13h, MSDOS err : Disk write-protected 
  4706                              <1> 	;mov	dx, 0
  4707                              <1> 	; 29/07/2022
  4708 0000BEF8 31D2                <1> 	xor	edx, edx ; 0
  4709 0000BEFA 31C0                <1> 	xor	eax, eax ; 0
  4710 0000BEFC B01E                <1> 	mov	al, 30	
  4711 0000BEFE F9                  <1> 	stc
  4712                              <1> 	; err retn: EDX = 0, EBX = File name offset
  4713                              <1> 	; ESI -> Dos drive description table address	
  4714 0000BEFF C3                  <1> 	retn
  4715                              <1> 
  4716                              <1> ;loc_createfile_access_denied:
  4717                              <1> ;	mov	eax, 05h ; access denied (invalid attributes input)
  4718                              <1> ;	stc
  4719                              <1> ;	retn
  4720                              <1> 
  4721                              <1> loc_createfile_check_file_sytem:
  4722 0000BF00 807E0301            <1> 	cmp	byte [esi+LD_FATType], 1
  4723 0000BF04 730A                <1> 	jnb	short loc_createfile_chk_empty_FAT_file_sign1
  4724                              <1> 
  4725 0000BF06 A3[54830100]        <1> 	mov	[createfile_size], eax
  4726                              <1> 	; ESI = Logical Dos Drive Description Table address
  4727                              <1> 	; EBX = ASCIIZ File Name address
  4728 0000BF0B E9F6020000          <1> 	jmp	create_fs_file
  4729                              <1> 
  4730                              <1> loc_createfile_chk_empty_FAT_file_sign1:
  4731                              <1> 	; ECX = FFFFFFFFh -> create empty file if drive has FAT fs
  4732 0000BF10 41                  <1> 	inc	ecx
  4733 0000BF11 7506                <1> 	jnz	short loc_createfile_chk_empty_FAT_file_sign2
  4734 0000BF13 890D[54830100]      <1> 	mov	[createfile_size], ecx ; 0 ; empty file
  4735                              <1> 
  4736                              <1> loc_createfile_chk_empty_FAT_file_sign2:
  4737                              <1> 	; 23/03/2016
  4738 0000BF19 668B4E11            <1> 	mov	cx, [esi+LD_BPB+BytesPerSec]
  4739 0000BF1D 66890D[70830100]    <1> 	mov	[createfile_BytesPerSec], cx
  4740                              <1> 	
  4741                              <1> 	; EBX = ASCIIZ File Name address
  4742 0000BF24 0FB65613            <1> 	movzx	edx, byte [esi+LD_BPB+SecPerClust]
  4743 0000BF28 8815[69830100]      <1> 	mov	[createfile_SecPerClust], dl
  4744 0000BF2E 8B4E74              <1> 	mov	ecx, [esi+LD_FreeSectors]
  4745 0000BF31 39D1                <1> 	cmp	ecx, edx ; byte [createfile_SecPerClust]
  4746 0000BF33 7306                <1> 	jnb	short loc_create_fat_file
  4747                              <1> 	  
  4748                              <1> loc_createfile_insufficient_disk_space:
  4749 0000BF35 B827000000          <1> 	mov	eax, 27h
  4750                              <1> loc_createfile_gffc_retn:
  4751 0000BF3A C3                  <1> 	retn
  4752                              <1> 
  4753                              <1> loc_create_fat_file:
  4754 0000BF3B 891D[4C830100]      <1> 	mov	[createfile_Name_Offset], ebx
  4755 0000BF41 890D[50830100]      <1> 	mov	[createfile_FreeSectors], ecx
  4756                              <1> 
  4757                              <1> loc_createfile_gffc_1:
  4758 0000BF47 E8DD040000          <1> 	call	get_first_free_cluster
  4759 0000BF4C 72EC                <1> 	jc	short loc_createfile_gffc_retn
  4760                              <1> 
  4761 0000BF4E A3[58830100]        <1> 	mov	[createfile_FFCluster], eax
  4762                              <1> 
  4763                              <1> loc_createfile_locate_ffe_on_directory:
  4764                              <1> 	; Current directory fcluster <> Directory buffer cluster
  4765                              <1> 	; Current directory will be reloaded by
  4766                              <1> 	; 'locate_current_dir_file' procedure
  4767                              <1> 	;
  4768                              <1> 	; ESI = Logical Dos Drv Desc. Table Adress
  4769 0000BF53 56                  <1> 	push	esi ; *
  4770 0000BF54 31C0                <1> 	xor	eax, eax
  4771                              <1> 
  4772 0000BF56 A3[267F0100]        <1> 	mov	dword [FAT_ClusterCounter], eax ; 0
  4773                              <1> 	; 21/03/2016
  4774 0000BF5B A2[72830100]        <1> 	mov	byte [createfile_wfc], al ; 0 
  4775                              <1> 
  4776 0000BF60 89C1                <1>  	mov	ecx, eax
  4777 0000BF62 6649                <1> 	dec	cx ; FFFFh  
  4778                              <1> 	; CX = FFFFh -> find first deleted or free entry
  4779                              <1> 	; ESI would be ASCIIZ filename address if the call
  4780                              <1> 	; would not be for first free or deleted dir entry  
  4781 0000BF64 E852E8FFFF          <1> 	call	locate_current_dir_file
  4782                              <1> 	;jnc	loc_createfile_set_ff_dir_entry
  4783                              <1> 	; 29/07/2022
  4784 0000BF69 7205                <1> 	jc	short loc_createfile_locate_file_err
  4785 0000BF6B E9EC000000          <1> 	jmp	loc_createfile_set_ff_dir_entry	
  4786                              <1> 
  4787                              <1> loc_createfile_locate_file_err: ; 29/07/2022
  4788 0000BF70 5E                  <1> 	pop	esi ; *
  4789                              <1> 	 ; ESI = Logical DOS Drv. Description Table Address 
  4790 0000BF71 83F802              <1> 	cmp	eax, 2
  4791 0000BF74 7402                <1> 	je	short loc_createfile_add_new_cluster
  4792                              <1> loc_createfile_locate_file_stc_retn:
  4793 0000BF76 F9                  <1> 	stc
  4794 0000BF77 C3                  <1> 	retn
  4795                              <1> 
  4796                              <1> loc_createfile_add_new_cluster:
  4797 0000BF78 803D[09780100]02    <1> 	cmp	byte [Current_FATType], 2
  4798                              <1> 	;cmp	byte [esi+LD_FATType], 2
  4799 0000BF7F 770C                <1> 	ja	short loc_createfile_add_new_cluster_check_fsc
  4800 0000BF81 803D[08780100]01    <1> 	cmp	byte [Current_Dir_Level], 1
  4801                              <1> 	;cmp	byte [esi+LD_CDirLevel], 1
  4802 0000BF88 7303                <1> 	jnb	short loc_createfile_add_new_cluster_check_fsc
  4803                              <1> 	
  4804                              <1> 	;mov	eax, 12
  4805 0000BF8A B00C                <1> 	mov	al, 12 ; No more files 
  4806                              <1> 
  4807                              <1> loc_createfile_anc_retn:
  4808 0000BF8C C3                  <1> 	retn
  4809                              <1> 
  4810                              <1> loc_createfile_add_new_cluster_check_fsc:
  4811 0000BF8D 8B0D[50830100]      <1> 	mov	ecx, [createfile_FreeSectors]
  4812 0000BF93 0FB605[69830100]    <1> 	movzx	eax, byte [createfile_SecPerClust]
  4813                              <1> 	;shl	ax, 1 ; AX = 2 * AX
  4814                              <1> 	; 29/07/2022
  4815 0000BF9A D1E0                <1> 	shl	eax, 1
  4816 0000BF9C 39C1                <1> 	cmp	ecx, eax
  4817 0000BF9E 7295                <1>         jb	short loc_createfile_insufficient_disk_space
  4818                              <1> 
  4819                              <1> loc_createfile_add_new_subdir_cluster:
  4820 0000BFA0 8B15[367F0100]      <1> 	mov	edx, [DirBuff_Cluster]
  4821 0000BFA6 8915[5C830100]      <1> 	mov	[createfile_LastDirCluster], edx	
  4822                              <1> 
  4823 0000BFAC A1[58830100]        <1> 	mov	eax, [createfile_FFCluster]
  4824 0000BFB1 E80D040000          <1> 	call	load_FAT_sub_directory 
  4825 0000BFB6 72D4                <1> 	jc	short loc_createfile_anc_retn
  4826                              <1> 
  4827                              <1> pass_createfile_add_new_subdir_cluster:
  4828                              <1> 	;movzx	eax, word [esi+LD_BPB+BytesPerSec]
  4829 0000BFB8 0FB705[70830100]    <1> 	movzx	eax, word [createfile_BytesPerSec] ; 23/03/2016
  4830 0000BFBF F7E1                <1> 	mul	ecx ; ecx = directory buffer sector count
  4831 0000BFC1 89C1                <1> 	mov	ecx, eax
  4832 0000BFC3 C1E902              <1> 	shr	ecx, 2 ; dword count
  4833 0000BFC6 29C0                <1> 	sub	eax, eax ; 0
  4834 0000BFC8 F3AB                <1> 	rep	stosd 
  4835                              <1> 	;
  4836 0000BFCA C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2 
  4837 0000BFD1 E8BAEFFFFF          <1> 	call	save_directory_buffer
  4838 0000BFD6 72B4                <1> 	jc	short loc_createfile_anc_retn
  4839                              <1> 
  4840                              <1> loc_createfile_save_added_subdir_cluster:
  4841 0000BFD8 A1[5C830100]        <1> 	mov	eax, [createfile_LastDirCluster]
  4842 0000BFDD 8B0D[58830100]      <1> 	mov	ecx, [createfile_FFCluster]
  4843 0000BFE3 E80E050000          <1> 	call	update_cluster
  4844 0000BFE8 7304                <1> 	jnc	short loc_createfile_save_fat_buffer_0
  4845 0000BFEA 09C0                <1> 	or	eax, eax ; EAX = 0 -> cluster value is 0 or eocc
  4846 0000BFEC 751A                <1> 	jnz	short loc_createfile_save_fat_buffer_stc_retn
  4847                              <1> 
  4848                              <1> loc_createfile_save_fat_buffer_0:
  4849 0000BFEE A1[58830100]        <1> 	mov	eax, [createfile_FFCluster]
  4850 0000BFF3 A3[5C830100]        <1> 	mov	[createfile_LastDirCluster], eax
  4851 0000BFF8 B9FFFFFF0F          <1> 	mov	ecx, 0FFFFFFFh ; 28 bit
  4852 0000BFFD E8F4040000          <1> 	call	update_cluster
  4853 0000C002 7306                <1> 	jnc	short loc_createfile_save_fat_buffer_1
  4854 0000C004 09C0                <1> 	or	eax, eax ; Was it free cluster
  4855 0000C006 7402                <1> 	jz	short loc_createfile_save_fat_buffer_1
  4856                              <1> 
  4857                              <1> loc_createfile_save_fat_buffer_stc_retn:
  4858 0000C008 F9                  <1> 	stc
  4859                              <1> loc_createfile_save_fat_buffer_retn:
  4860                              <1> loc_createfile_gffc_2_stc_retn:
  4861 0000C009 C3                  <1> 	retn
  4862                              <1> 
  4863                              <1> loc_createfile_save_fat_buffer_1:
  4864                              <1> 	; byte [FAT_BuffValidData] = 2 
  4865 0000C00A E86A070000          <1> 	call	save_fat_buffer
  4866 0000C00F 72F8                <1> 	jc	short loc_createfile_save_fat_buffer_retn
  4867                              <1> 
  4868 0000C011 803D[267F0100]01    <1> 	cmp	byte [FAT_ClusterCounter], 1
  4869 0000C018 7222                <1> 	jb	short loc_createfile_save_fat_buffer_2
  4870                              <1> 
  4871                              <1> 	; ESI = Logical DOS Drive Description Table address 
  4872 0000C01A A1[267F0100]        <1> 	mov	eax, [FAT_ClusterCounter]
  4873                              <1> 
  4874 0000C01F C605[267F0100]00    <1> 	mov	byte [FAT_ClusterCounter], 0 ; 21/03/2016
  4875                              <1> 
  4876 0000C026 66BB01FF            <1> 	mov	bx, 0FF01h ; add free clusters 
  4877 0000C02A E8DB070000          <1> 	call	calculate_fat_freespace
  4878                              <1> 
  4879                              <1> 	;inc	eax ; 0FFFFFFFFh -> 0 ; recalculation is needed!
  4880                              <1> 	;jnz	short loc_createfile_save_fat_buffer_2
  4881                              <1> 
  4882                              <1> 	; ecx > 0 -> Recalculation is needed
  4883 0000C02F 09C9                <1> 	or	ecx, ecx 
  4884 0000C031 7409                <1> 	jz	short loc_createfile_save_fat_buffer_2
  4885                              <1> 
  4886 0000C033 66BB00FF            <1> 	mov	bx, 0FF00h ; ; recalculate free space
  4887 0000C037 E8CE070000          <1> 	call	calculate_fat_freespace
  4888                              <1> 
  4889                              <1> loc_createfile_save_fat_buffer_2:
  4890                              <1> 	;call	update_parent_dir_lmdt
  4891                              <1> 
  4892                              <1> loc_createfile_gffc_2:
  4893 0000C03C E8E8030000          <1> 	call	get_first_free_cluster
  4894 0000C041 72C6                <1> 	jc	short loc_createfile_gffc_2_stc_retn
  4895                              <1> 
  4896 0000C043 A3[58830100]        <1> 	mov	[createfile_FFCluster], eax
  4897                              <1> 
  4898 0000C048 A1[5C830100]        <1> 	mov	eax, [createfile_LastDirCluster]
  4899                              <1> 	
  4900 0000C04D E871030000          <1> 	call	load_FAT_sub_directory 
  4901 0000C052 72B5                <1> 	jc	short loc_createfile_gffc_2_stc_retn
  4902                              <1> 
  4903 0000C054 BF00000800          <1> 	mov	edi, Directory_Buffer
  4904                              <1> 
  4905                              <1> 	;sub	bx, bx ; directory entry index/number = 0
  4906                              <1> 	; 29/07/2022
  4907 0000C059 29C9                <1> 	sub	ecx, ecx
  4908                              <1> 
  4909 0000C05B 56                  <1> 	push	esi ; * ; 23/03/2016
  4910                              <1> 
  4911                              <1> loc_createfile_set_ff_dir_entry:
  4912                              <1> 	;mov	[createfile_DirIndex], bx
  4913                              <1> 	; 29/07/2022
  4914 0000C05C 66890D[6A830100]    <1> 	mov	[createfile_DirIndex], cx ; 0
  4915                              <1> 
  4916                              <1>         ; EDI = Directory entry address
  4917 0000C063 8B35[4C830100]      <1> 	mov	esi, [createfile_Name_Offset]
  4918 0000C069 A1[58830100]        <1> 	mov	eax, [createfile_FFCluster]
  4919 0000C06E A3[60830100]        <1> 	mov	[createfile_Cluster], eax ; 24/03/2016
  4920                              <1> 	;mov	ch, 0FFh
  4921                              <1>         ; 29/07/2022
  4922                              <1> 	; ecx = 0
  4923 0000C073 FECD                <1> 	dec	ch ; 0 -> 0FFh
  4924 0000C075 8A0D[68830100]      <1> 	mov	cl, [createfile_attrib] ; file attributes
  4925                              <1> 	; CH > 0 -> File size is in [EBX]
  4926 0000C07B BB[54830100]        <1> 	mov	ebx, createfile_size
  4927                              <1>   
  4928 0000C080 E838EEFFFF          <1> 	call	make_directory_entry
  4929                              <1> 	
  4930 0000C085 5E                  <1> 	pop	esi ; * ; ESI = Logical Dos Drv Desc. Table address
  4931                              <1> 
  4932 0000C086 C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2 
  4933 0000C08D E8FEEEFFFF          <1> 	call	save_directory_buffer
  4934 0000C092 7221                <1> 	jc	short loc_createfile_set_ff_dir_entry_retn
  4935                              <1> 
  4936 0000C094 C605[73830100]01    <1> 	mov	byte [createfile_UpdatePDir], 1 ; 31/03/2016 
  4937                              <1> 
  4938                              <1> loc_createfile_get_set_write_file_cluster:
  4939 0000C09B A1[54830100]        <1> 	mov	eax, [createfile_size]
  4940 0000C0A0 09C0                <1> 	or	eax, eax
  4941 0000C0A2 756B                <1> 	jnz	short loc_createfile_get_set_wfc_cont
  4942 0000C0A4 40                  <1> 	inc	eax
  4943                              <1> 	; 23/03/2016
  4944 0000C0A5 0FB61D[69830100]    <1> 	movzx	ebx, byte [createfile_SecPerClust]
  4945                              <1> 	;movzx	ecx, word [esi+LD_BPB+BytesPerSec] ; 512
  4946 0000C0AC 0FB70D[70830100]    <1>         movzx   ecx, word [createfile_BytesPerSec] ; 512
  4947 0000C0B3 EB77                <1> 	jmp	loc_createfile_set_cluster_count 
  4948                              <1> 
  4949                              <1> loc_createfile_set_ff_dir_entry_retn:
  4950 0000C0B5 C3                  <1> 	retn
  4951                              <1> 
  4952                              <1> loc_createfile_write_fcluster_to_disk:
  4953 0000C0B6 034668              <1> 	add	eax, [esi+LD_DATABegin] ; convert to physical address
  4954 0000C0B9 BB00000700          <1> 	mov	ebx, Cluster_Buffer
  4955                              <1> 	; ESI = Logical DOS Drv. Desc. Tbl. address
  4956                              <1> 	; EAX = Disk address
  4957                              <1> 	; EBX = Sector Buffer
  4958                              <1> 	; ECX = sectors per cluster
  4959 0000C0BE E8D35C0000          <1> 	call	disk_write
  4960 0000C0C3 7211                <1> 	jc	short loc_createfile_dsk_wr_err
  4961                              <1> 
  4962                              <1> loc_createfile_update_fat_cluster:
  4963                              <1> 	; 21/03/2016	
  4964 0000C0C5 803D[72830100]00    <1> 	cmp	byte [createfile_wfc], 0 
  4965 0000C0CC 7711                <1> 	ja	short loc_createfile_update_fat_cluster_n1
  4966                              <1> 
  4967 0000C0CE FE05[72830100]      <1> 	inc	byte [createfile_wfc] ; 1
  4968 0000C0D4 EB1F                <1> 	jmp	short loc_createfile_update_fat_cluster_n2
  4969                              <1> 
  4970                              <1> loc_createfile_dsk_wr_err:
  4971                              <1> 	; 16/10/2016 (1Dh -> 18)
  4972                              <1> 	; 23/03/2016
  4973                              <1> 	;mov	eax, 18 ; Drive not ready or write error !
  4974                              <1> 	; 29/07/2022
  4975 0000C0D6 29C0                <1> 	sub	eax, eax
  4976 0000C0D8 B012                <1> 	mov	al, 18
  4977                              <1> loc_cf_stc_retn:
  4978 0000C0DA E9B7000000          <1> 	jmp	loc_createfile_stc_retn
  4979                              <1> 
  4980                              <1> loc_createfile_update_fat_cluster_n1:
  4981 0000C0DF A1[64830100]        <1> 	mov	eax, [createfile_PCluster]
  4982 0000C0E4 8B0D[60830100]      <1> 	mov	ecx, [createfile_Cluster]
  4983 0000C0EA E807040000          <1> 	call	update_cluster
  4984 0000C0EF 7304                <1> 	jnc	short loc_createfile_update_fat_cluster_n2
  4985 0000C0F1 09C0                <1> 	or	eax, eax ; EAX = 0 -> cluster value is 0 or eocc
  4986                              <1> 	;jnz	loc_createfile_stc_retn
  4987                              <1> 	; 29/07/2022
  4988 0000C0F3 75E5                <1> 	jnz	short loc_cf_stc_retn
  4989                              <1> 
  4990                              <1> loc_createfile_update_fat_cluster_n2:
  4991 0000C0F5 A1[60830100]        <1>         mov	eax, [createfile_Cluster]
  4992 0000C0FA B9FFFFFF0F          <1> 	mov	ecx, 0FFFFFFFh
  4993 0000C0FF E8F2030000          <1> 	call	update_cluster
  4994 0000C104 734D                <1> 	jnc	short loc_createfile_save_fat_buffer_3
  4995 0000C106 09C0                <1> 	or	eax, eax ; EAX = 0 -> cluster value is 0 or eocc
  4996 0000C108 7449                <1> 	jz	short loc_createfile_save_fat_buffer_3
  4997                              <1> 
  4998                              <1> loc_cf_upd_fat_fcluster_stc_retn:
  4999 0000C10A E987000000          <1> 	jmp	loc_createfile_stc_retn
  5000                              <1> 
  5001                              <1> loc_createfile_get_set_wfc_cont:
  5002                              <1> 	;movzx	ecx, word [esi+LD_BPB+BytesPerSec] ; 512	
  5003 0000C10F 0FB70D[70830100]    <1> 	movzx	ecx, word [createfile_BytesPerSec] ; 512
  5004 0000C116 01C8                <1> 	add	eax, ecx
  5005 0000C118 48                  <1> 	dec	eax  ; add eax, 511
  5006 0000C119 29D2                <1> 	sub	edx, edx
  5007 0000C11B F7F1                <1> 	div	ecx
  5008 0000C11D 0FB61D[69830100]    <1> 	movzx	ebx, byte [createfile_SecPerClust]
  5009 0000C124 01D8                <1> 	add	eax, ebx
  5010 0000C126 48                  <1> 	dec	eax  ; add eax, SecPerClust - 1
  5011 0000C127 6631D2              <1> 	xor	dx, dx
  5012 0000C12A F7F3                <1> 	div	ebx
  5013                              <1> 
  5014                              <1> loc_createfile_set_cluster_count:
  5015 0000C12C A3[6C830100]        <1> 	mov 	[createfile_CCount], eax
  5016                              <1> 	
  5017 0000C131 BF00000700          <1> 	mov	edi, Cluster_Buffer
  5018 0000C136 89C8                <1> 	mov	eax, ecx ; Bytes per Sector
  5019 0000C138 F7E3                <1> 	mul	ebx ; Sectors per Cluster 
  5020                              <1> 	; EAX = Bytes per Cluster
  5021 0000C13A 89C1                <1> 	mov	ecx, eax
  5022 0000C13C C1E902              <1> 	shr	ecx, 2 ; dword count
  5023 0000C13F 31C0                <1> 	xor	eax, eax
  5024 0000C141 F3AB                <1> 	rep	stosd ; clear cluster buffer
  5025                              <1> 
  5026 0000C143 A1[60830100]        <1> 	mov	eax, [createfile_Cluster] ; 24/03/2016
  5027                              <1> 
  5028 0000C148 89D9                <1> 	mov	ecx, ebx
  5029                              <1> 
  5030                              <1> loc_createfile_get_set_wf_fclust_cont:
  5031                              <1> 	;sub	eax, 2
  5032                              <1> 	; 30/07/2022
  5033 0000C14A 48                  <1> 	dec	eax
  5034 0000C14B 48                  <1> 	dec	eax
  5035 0000C14C F7E1                <1> 	mul	ecx
  5036                              <1> 	; EAX = Logical DOS disk address (offset)
  5037 0000C14E E963FFFFFF          <1>         jmp     loc_createfile_write_fcluster_to_disk
  5038                              <1> 
  5039                              <1> loc_createfile_save_fat_buffer_3:
  5040                              <1> 	; byte [FAT_BuffValidData] = 2
  5041 0000C153 E821060000          <1> 	call	save_fat_buffer
  5042                              <1> 	;jc	loc_createfile_stc_retn
  5043                              <1> 	; 29/07/2022
  5044 0000C158 72B0                <1> 	jc	short loc_cf_upd_fat_fcluster_stc_retn
  5045                              <1> 
  5046                              <1> 	; 21/03/2016
  5047 0000C15A 803D[267F0100]01    <1> 	cmp	byte [FAT_ClusterCounter], 1
  5048 0000C161 721B                <1> 	jb	short loc_createfile_save_fat_buffer_4
  5049                              <1> 
  5050                              <1> 	; ESI = Logical DOS Drive Description Table address 
  5051 0000C163 A1[267F0100]        <1> 	mov	eax, [FAT_ClusterCounter]
  5052 0000C168 66BB01FF            <1> 	mov	bx, 0FF01h ; add free clusters 
  5053 0000C16C E899060000          <1> 	call	calculate_fat_freespace
  5054                              <1> 
  5055                              <1> 	;inc	eax ; 0FFFFFFFFh -> 0 ; recalculation is needed!
  5056                              <1> 	;jnz	short loc_createfile_save_fat_buffer_4
  5057                              <1> 
  5058                              <1> 	; ecx > 0 -> Recalculation is needed
  5059 0000C171 09C9                <1> 	or	ecx, ecx 
  5060 0000C173 7409                <1> 	jz	short loc_createfile_save_fat_buffer_4
  5061                              <1> 
  5062 0000C175 66BB00FF            <1> 	mov	bx, 0FF00h ; ; recalculate free space
  5063 0000C179 E88C060000          <1> 	call	calculate_fat_freespace
  5064                              <1> 
  5065                              <1> loc_createfile_save_fat_buffer_4:
  5066 0000C17E FF0D[6C830100]      <1> 	dec	dword [createfile_CCount]
  5067                              <1> 	;jz	short loc_createfile_upd_dir_modif_date_time
  5068 0000C184 743E                <1> 	jz	short loc_createfile_stc_retn_cc ; 31/03/2016
  5069                              <1> 
  5070                              <1> loc_createfile_get_set_write_next_cluster:
  5071 0000C186 E89E020000          <1> 	call	get_first_free_cluster
  5072 0000C18B 7209                <1> 	jc	short loc_createfile_stc_retn
  5073                              <1> 
  5074                              <1> loc_createfile_get_set_write_next_cluster_1:
  5075 0000C18D 83F8FF              <1> 	cmp	eax, 0FFFFFFFFh
  5076 0000C190 7212                <1> 	jb	short loc_createfile_get_set_write_next_cluster_2
  5077                              <1> 
  5078                              <1> loc_createfile_wnc_insufficient_disk_space:	
  5079                              <1> 	;mov	eax, 27h ; Insufficient disk space
  5080                              <1> 	; 29/07/2022
  5081 0000C192 31C0                <1> 	xor	eax, eax
  5082 0000C194 B027                <1> 	mov	al, 27h
  5083                              <1> 
  5084                              <1> loc_createfile_stc_retn:
  5085 0000C196 803D[72830100]01    <1> 	cmp	byte [createfile_wfc], 1
  5086 0000C19D 7324                <1> 	jnb	short loc_createfile_err_retn
  5087 0000C19F C3                  <1> 	retn
  5088                              <1> 
  5089                              <1> loc_createfile_wnc_inv_format_retn:
  5090                              <1> 	;mov	eax, 28
  5091 0000C1A0 B01C                <1> 	mov	al, 28 ; Invalid format
  5092 0000C1A2 EBF2                <1> 	jmp	short loc_createfile_stc_retn
  5093                              <1> 	         
  5094                              <1> loc_createfile_get_set_write_next_cluster_2:
  5095 0000C1A4 83F802              <1> 	cmp	eax, 2
  5096 0000C1A7 72F7                <1> 	jb	short loc_createfile_wnc_inv_format_retn
  5097                              <1> 
  5098                              <1> loc_createfile_get_set_write_next_cluster_3:
  5099 0000C1A9 8B0D[60830100]      <1> 	mov	ecx, [createfile_Cluster]
  5100 0000C1AF A3[60830100]        <1> 	mov	[createfile_Cluster], eax
  5101 0000C1B4 890D[64830100]      <1> 	mov	[createfile_PCluster], ecx
  5102 0000C1BA 0FB60D[69830100]    <1> 	movzx	ecx, byte [createfile_SecPerClust]
  5103 0000C1C1 EB87                <1> 	jmp	short loc_createfile_get_set_wf_fclust_cont
  5104                              <1> 
  5105                              <1> loc_createfile_err_retn:
  5106 0000C1C3 F9                  <1> 	stc
  5107                              <1> 
  5108                              <1> ;loc_createfile_upd_dir_modif_date_time:
  5109                              <1> loc_createfile_stc_retn_cc: ; 31/03/2016
  5110 0000C1C4 9C                  <1> 	pushf	; cpu is here for an error return or completion 
  5111 0000C1C5 50                  <1> 	push	eax ; error code if cf = 1
  5112                              <1> 
  5113                              <1> 	;call	update_parent_dir_lmdt
  5114                              <1> 
  5115                              <1> ;loc_createfile_stc_retn_cc:
  5116 0000C1C6 A1[267F0100]        <1> 	mov	eax, [FAT_ClusterCounter]
  5117 0000C1CB 09C0                <1> 	or	eax, eax
  5118 0000C1CD 741A                <1> 	jz	short loc_createfile_stc_retn_pop_eax
  5119 0000C1CF 8A3D[0A780100]      <1> 	mov	bh, [Current_Drv]
  5120 0000C1D5 B301                <1> 	mov	bl, 01h ; BL = 1 -> add clusters
  5121                              <1> 	; NOTE: EAX value will be added to Free Cluster Count
  5122                              <1> 	; (If EAX value is negative, Free Cluster Count will be decreased)
  5123 0000C1D7 E82E060000          <1>   	call	calculate_fat_freespace
  5124                              <1>         ; ESI = Logical DOS Drive Description Table Address 
  5125                              <1>         ;jc	short loc_createfile_stc_retn_pop_eax_cf
  5126 0000C1DC 21C9                <1> 	and	ecx, ecx ; cx = 0 -> valid free sector count
  5127 0000C1DE 7409                <1> 	jz	short loc_createfile_stc_retn_pop_eax
  5128                              <1> 
  5129                              <1> loc_createfile_stc_retn_recalc_FAT_freespace:
  5130 0000C1E0 66BB00FF            <1> 	mov	bx, 0FF00h ; bh = 0FFh -> 
  5131                              <1> 	; ESI = Logical DOS Drv DT Addr
  5132                              <1> 	; BL = 0 -> Recalculate 
  5133 0000C1E4 E821060000          <1> 	call	calculate_fat_freespace
  5134                              <1> 
  5135                              <1> loc_createfile_stc_retn_pop_eax:
  5136 0000C1E9 58                  <1> 	pop	eax
  5137 0000C1EA 9D                  <1> 	popf
  5138 0000C1EB 7218                <1> 	jc	short loc_createfile_retn
  5139                              <1> 
  5140                              <1> loc_createfile_retn_fcluster:
  5141 0000C1ED A1[58830100]        <1> 	mov	eax, [createfile_FFCluster]
  5142 0000C1F2 BB[54830100]        <1> 	mov	ebx, createfile_size
  5143                              <1> 	;movzx	ecx, byte [esi+LD_BPB+SecPerClust]
  5144 0000C1F7 0FB60D[69830100]    <1> 	movzx	ecx, byte [createfile_SecPerClust] ; 23/03/2016
  5145 0000C1FE 0FB715[6A830100]    <1> 	movzx	edx, word [createfile_DirIndex]
  5146                              <1> 
  5147                              <1> loc_createfile_retn:
  5148 0000C205 C3                  <1> 	retn
  5149                              <1> 
  5150                              <1> ; 28/07/2022 (TRDOS 386 Kernel v2.0.5)
  5151                              <1> 
  5152                              <1> create_fs_file:
  5153                              <1> 	; temporary (21/03/2016)
  5154                              <1> 	;retn
  5155                              <1> 
  5156                              <1> delete_fs_file:
  5157                              <1> 	; temporary (28/02/2016)
  5158                              <1> 	;retn
  5159                              <1> 
  5160                              <1> rename_fs_file_or_directory:
  5161                              <1> 	;retn
  5162                              <1> 
  5163                              <1> make_fs_directory:
  5164                              <1> 	; temporary (21/02/2016)
  5165                              <1> 	;retn
  5166                              <1> 
  5167                              <1> add_new_fs_section:
  5168                              <1> 	; temporary (11/03/2016)
  5169                              <1> 	;retn
  5170                              <1> 
  5171                              <1> delete_fs_directory_entry:
  5172                              <1> 	; temporary (11/03/2016)
  5173                              <1> 	;retn
  5174                              <1> 
  5175                              <1> csftdf2_read_fs_file_sectors:
  5176                              <1> 	; temporary (19/03/2016)
  5177                              <1> 	;retn
  5178                              <1> 
  5179                              <1> csftdf2_write_fs_file_sectors:
  5180                              <1> 	; temporary (19/03/2016)
  5181 0000C206 C3                  <1> 	retn
  3311                                  %include 'trdosk5.s' ; 24/01/2016
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.5) - File System Procedures : trdosk5s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 07/08/2022 (Previous: 23/10/2016)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 24/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.11 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Derived from TRDOS Operating System v1.0 (8086) source code by Erdogan Tan
    11                              <1> ; DRV_FAT.ASM (21/08/2011)
    12                              <1> ; ****************************************************************************
    13                              <1> ; DRV_FAT.ASM (c) 2005-2011 Erdogan TAN [ 07/07/2009 ] Last Update: 21/08/2011
    14                              <1> 
    15                              <1> get_next_cluster:
    16                              <1> 	; 07/08/2022
    17                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
    18                              <1> 	; 15/10/2016
    19                              <1> 	; 23/03/2016
    20                              <1> 	; 01/02/2016 (TRDOS 386 = TRDOS v2.0)
    21                              <1> 	; 05/07/2011
    22                              <1> 	; 07/07/2009
    23                              <1> 	; 2005
    24                              <1> 	; INPUT ->
    25                              <1> 	;	EAX = Cluster Number (32 bit)
    26                              <1> 	;	ESI = Logical DOS Drive Parameters Table
    27                              <1> 	; OUTPUT ->
    28                              <1> 	;	cf = 0 -> No Error, EAX valid
    29                              <1> 	;	cf = 1 & EAX = 0 -> End Of Cluster Chain
    30                              <1> 	;	cf = 1 & EAX > 0 -> Error
    31                              <1> 	;	ECX = Current/Previous cluster (if CF = 0)
    32                              <1> 	;	EAX = Next Cluster Number (32 bit)
    33                              <1> 	;
    34                              <1> 	; (Modified registers: EAX, ECX, EBX, EDX)
    35                              <1> 
    36 0000C207 A3[1A7F0100]        <1> 	mov	[FAT_CurrentCluster], eax
    37                              <1> check_next_cluster_fat_type:
    38 0000C20C 29D2                <1> 	sub	edx, edx ; 0
    39 0000C20E 807E0302            <1> 	cmp     byte [esi+LD_FATType], 2
    40 0000C212 7243                <1> 	jb	short get_FAT12_next_cluster
    41                              <1> 	;ja	get_FAT32_next_cluster
    42                              <1> 	; 25/07/2022
    43 0000C214 7605                <1> 	jna	short get_FAT16_next_cluster
    44 0000C216 E9B2000000          <1> 	jmp	get_FAT32_next_cluster
    45                              <1> 
    46                              <1> get_FAT16_next_cluster:
    47 0000C21B BB00030000          <1> 	mov	ebx, 300h ;768
    48 0000C220 F7F3                <1> 	div	ebx
    49                              <1> 	; EAX = Count of 3 FAT sectors
    50                              <1> 	; EDX = Cluster Offset (< 768)
    51                              <1> 	;shl	dx, 1 ; Multiply by 2
    52                              <1> 	; 25/07/2022
    53 0000C222 D1E2                <1> 	shl	edx, 1
    54 0000C224 89D3                <1> 	mov	ebx, edx ; Byte Offset
    55 0000C226 81C3001C0900        <1> 	add	ebx, FAT_Buffer
    56 0000C22C 66BA0300            <1> 	mov	dx, 3
    57 0000C230 F7E2                <1> 	mul	edx  
    58                              <1> 	; EAX = FAT Sector (<= 256)
    59                              <1> 	; EDX = 0
    60 0000C232 8A0E                <1> 	mov	cl, [esi+LD_Name]
    61                              <1> 	;cmp	byte [FAT_BuffValidData], 0
    62 0000C234 3815[1E7F0100]      <1>         cmp	[FAT_BuffValidData], dl ; 0
    63 0000C23A 7674                <1> 	jna     short load_FAT_sectors0
    64 0000C23C 3A0D[1F7F0100]      <1> 	cmp	cl, [FAT_BuffDrvName]
    65 0000C242 756C                <1>         jne     short load_FAT_sectors0
    66 0000C244 3B05[227F0100]      <1> 	cmp	eax, [FAT_BuffSector]
    67 0000C24A 756A                <1>         jne     short load_FAT_sectors1
    68                              <1> 	;movzx	eax, word [ebx]
    69 0000C24C 668B03              <1> 	mov	ax, [ebx]
    70                              <1> 	; 01/02/2016
    71                              <1> 	; DRV_FAT.ASM (21/08/2011) had a FATal bug here !
    72                              <1> 	; (cmp ah, 0Fh) ! (ax >= FF7h)
    73                              <1> 	; (how can i do a such mistake!?)
    74                              <1> 	;cmp	al, 0F7h
    75                              <1> 	;jb	short loc_pass_gnc_FAT16_eoc_check
    76                              <1> 	;cmp	ah, 0FFh
    77                              <1> 	;jb	short loc_pass_gnc_FAT16_eoc_check
    78 0000C24F 6683F8F7            <1> 	cmp	ax, 0FFF7h
    79 0000C253 724E                <1> 	jb	short loc_pass_gnc_FAT16_eoc_check
    80                              <1> 	; ax >= FFF7h (cluster 0002h to FFF6h is valid, in use)
    81 0000C255 EB4A                <1> 	jmp	short loc_pass_gnc_FAT16_eoc_check_xor_eax
    82                              <1> 
    83                              <1> get_FAT12_next_cluster:
    84 0000C257 BB00040000          <1> 	mov	ebx, 400h ;1024
    85 0000C25C F7F3                <1> 	div	ebx
    86                              <1> 	; EAX = Count of 3 FAT sectors
    87                              <1> 	; EDX = Cluster Offset (< 1024)
    88                              <1> 	; 25/07/2022
    89                              <1> 	;push	ax
    90 0000C25E 50                  <1> 	push	eax
    91                              <1> 	;mov	ax, 3	
    92 0000C25F B003                <1> 	mov	al, 3
    93                              <1> 	;mul	dx    	; Multiply by 3
    94 0000C261 F7E2                <1> 	mul	edx
    95                              <1> 	;shr	ax, 1	; Divide by 2
    96 0000C263 D1E8                <1>         shr	eax, 1
    97                              <1> 	;mov	bx, ax 	; Byte Offset
    98 0000C265 89C3                <1> 	mov	ebx, eax
    99 0000C267 81C3001C0900        <1> 	add	ebx, FAT_Buffer
   100 0000C26D 58                  <1> 	pop	eax
   101                              <1> 	;pop	ax
   102                              <1> 	;mov	dx, 3
   103 0000C26E B203                <1> 	mov	dl, 3
   104 0000C270 F7E2                <1> 	mul	edx 
   105                              <1> 	; EAX = FAT Sector (<= 12)
   106                              <1> 	; EDX = 0
   107 0000C272 8A0E                <1> 	mov	cl, [esi+LD_Name]
   108                              <1> 	;cmp	byte [FAT_BuffValidData], 0
   109 0000C274 3815[1E7F0100]      <1> 	cmp	[FAT_BuffValidData], dl ; 0
   110 0000C27A 7634                <1> 	jna	short load_FAT_sectors0
   111 0000C27C 3A0D[1F7F0100]      <1> 	cmp	cl, [FAT_BuffDrvName]
   112 0000C282 752C                <1> 	jne	short load_FAT_sectors0
   113 0000C284 3B05[227F0100]      <1> 	cmp	eax, [FAT_BuffSector]
   114 0000C28A 752A                <1> 	jne	short load_FAT_sectors1
   115 0000C28C A1[1A7F0100]        <1> 	mov	eax, [FAT_CurrentCluster]
   116                              <1> 	;shr	ax, 1
   117                              <1> 	; 25/07/2022
   118 0000C291 D1E8                <1> 	shr	eax, 1
   119                              <1> 	;movzx	eax, word [ebx]
   120 0000C293 668B03              <1> 	mov	ax, [ebx]
   121 0000C296 7313                <1> 	jnc	short get_FAT12_nc_even
   122                              <1> 	;shr	ax, 4
   123 0000C298 C1E804              <1> 	shr	eax, 4
   124                              <1> loc_gnc_fat12_eoc_check:
   125                              <1> 	;cmp	al, 0F7h
   126                              <1> 	;jb	short loc_pass_gnc_FAT16_eoc_check
   127                              <1> 	;cmp	ah, 0Fh
   128                              <1> 	;jb	short loc_pass_gnc_FAT16_eoc_check
   129 0000C29B 663DF70F            <1> 	cmp	ax, 0FF7h
   130 0000C29F 7202                <1> 	jb	short loc_pass_gnc_FAT16_eoc_check
   131                              <1> 	; ax >= FF7h (cluster 0002h to FF6h is valid, in use)
   132                              <1> 
   133                              <1> loc_pass_gnc_FAT16_eoc_check_xor_eax:
   134 0000C2A1 31C0                <1> 	xor	eax, eax ; 0
   135                              <1> loc_pass_gnc_FAT16_eoc_check:
   136                              <1> loc_pass_gnc_FAT32_eoc_check:
   137 0000C2A3 8B0D[1A7F0100]      <1> 	mov	ecx, [FAT_CurrentCluster]
   138 0000C2A9 F5                  <1> 	cmc
   139 0000C2AA C3                  <1> 	retn
   140                              <1> 
   141                              <1> get_FAT12_nc_even:
   142 0000C2AB 80E40F              <1> 	and	ah, 0Fh
   143 0000C2AE EBEB                <1> 	jmp	short loc_gnc_fat12_eoc_check
   144                              <1> 
   145                              <1> load_FAT_sectors0:
   146 0000C2B0 880D[1F7F0100]      <1> 	mov	[FAT_BuffDrvName], cl
   147                              <1> load_FAT_sectors1:
   148                              <1> 	; 25/07/2022
   149                              <1> 	;sub	edx, edx
   150                              <1> 	; edx = 0
   151 0000C2B6 A3[227F0100]        <1> 	mov	[FAT_BuffSector], eax
   152 0000C2BB 89C3                <1> 	mov	ebx, eax
   153 0000C2BD 034660              <1>         add     eax, [esi+LD_FATBegin]
   154 0000C2C0 B202                <1> 	mov	dl, 2
   155                              <1> 	;cmp	byte [esi+LD_FATType], 2
   156 0000C2C2 385603              <1>         cmp	[esi+LD_FATType], dl ; 2
   157 0000C2C5 7748                <1> 	ja      short load_FAT_sectors3
   158 0000C2C7 0FB74E1C            <1> 	movzx	ecx, word [esi+LD_BPB+BPB_FATSz16]
   159 0000C2CB EB45                <1> 	jmp	short load_FAT_sectors4
   160                              <1> 
   161                              <1> 	; 07/08/2022
   162                              <1> get_FAT32_next_cluster:
   163 0000C2CD BB80010000          <1> 	mov	ebx, 180h ;384
   164 0000C2D2 F7F3                <1> 	div	ebx
   165                              <1> 	; EAX = Count of 3 FAT sectors
   166                              <1> 	; EDX = Cluster Offset (< 384)
   167                              <1> 	;shl	dx, 2	; Multiply by 4
   168                              <1> 	; 25/07/2022
   169 0000C2D4 C1E202              <1> 	shl	edx, 2
   170 0000C2D7 89D3                <1> 	mov	ebx, edx ; Byte Offset
   171 0000C2D9 81C3001C0900        <1> 	add	ebx, FAT_Buffer
   172 0000C2DF 66BA0300            <1> 	mov	dx, 3
   173 0000C2E3 F7E2                <1> 	mul	edx	
   174                              <1>         ; EAX = FAT Sector (<= 2097152) ; (FFFFFF7h * 4) / 512
   175                              <1> 	; 	for 32KB cluster size:
   176                              <1> 	;	EAX <= 1024 = (4GB / 32KB) * 4) / 512 	
   177                              <1> 	; EDX = 0
   178 0000C2E5 8A0E                <1> 	mov	cl, [esi+LD_Name]
   179                              <1> 	;cmp	byte [FAT_BuffValidData], 0
   180 0000C2E7 3815[1E7F0100]      <1> 	cmp	[FAT_BuffValidData], dl ; 0
   181 0000C2ED 76C1                <1> 	jna	short load_FAT_sectors0
   182 0000C2EF 3A0D[1F7F0100]      <1> 	cmp	cl, [FAT_BuffDrvName]
   183 0000C2F5 75B9                <1> 	jne	short load_FAT_sectors0
   184 0000C2F7 3B05[227F0100]      <1> 	cmp	eax, [FAT_BuffSector] ; 0, 3, 6, 9 ...
   185 0000C2FD 75B7                <1> 	jne	short load_FAT_sectors1
   186 0000C2FF 8B03                <1> 	mov	eax, [ebx]
   187 0000C301 25FFFFFF0F          <1>  	and	eax, 0FFFFFFFh ; 28 bit Cluster
   188 0000C306 3DF7FFFF0F          <1> 	cmp	eax, 0FFFFFF7h
   189 0000C30B 7296                <1> 	jb	short loc_pass_gnc_FAT32_eoc_check
   190                              <1> 	; eax >= FFFFFF7h (cluster 0002h to FFFFFF6h is valid)
   191 0000C30D EB92                <1> 	jmp	short loc_pass_gnc_FAT16_eoc_check_xor_eax
   192                              <1> 
   193                              <1> load_FAT_sectors3:
   194 0000C30F 8B4E2A              <1> 	mov	ecx, [esi+LD_BPB+BPB_FATSz32]
   195                              <1> load_FAT_sectors4:
   196 0000C312 29D9                <1> 	sub	ecx, ebx ; [FAT_BuffSector]
   197                              <1> 	; 25/07/2022
   198 0000C314 FEC2                <1> 	inc	dl
   199                              <1> 	; edx = 3
   200                              <1>         ;cmp	ecx, 3
   201 0000C316 39D1                <1>         cmp	ecx, edx ; 3
   202 0000C318 7602                <1> 	jna     short load_FAT_sectors5
   203                              <1> 	;mov	ecx, 3
   204                              <1> 	; 25/07/2022
   205 0000C31A 89D1                <1> 	mov	ecx, edx ; 3
   206                              <1> load_FAT_sectors5:
   207 0000C31C BB001C0900          <1> 	mov	ebx, FAT_Buffer
   208 0000C321 E87F5A0000          <1> 	call	disk_read
   209 0000C326 730C                <1> 	jnc	short load_FAT_sectors_ok
   210                              <1> 	; 15/10/2016 (15h -> 17)
   211                              <1> 	; 23/03/2016 (15h)
   212 0000C328 B811000000          <1> 	mov	eax, 17 ; Drive not ready or read error
   213                              <1> 	;mov	byte [FAT_BuffValidData], 0
   214                              <1> 	; 25/07/2022
   215 0000C32D 8825[1E7F0100]      <1> 	mov	byte [FAT_BuffValidData], ah ; 0
   216 0000C333 C3                  <1> 	retn
   217                              <1> load_FAT_sectors_ok:
   218 0000C334 C605[1E7F0100]01    <1> 	mov	byte [FAT_BuffValidData], 1
   219 0000C33B A1[1A7F0100]        <1> 	mov	eax, [FAT_CurrentCluster]
   220 0000C340 E9C7FEFFFF          <1>         jmp     check_next_cluster_fat_type
   221                              <1> 
   222                              <1> load_FAT_root_directory:
   223                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   224                              <1> 	; 23/10/2016
   225                              <1> 	; 15/10/2016
   226                              <1> 	; 07/02/2016
   227                              <1> 	; 02/02/2016
   228                              <1> 	; 01/02/2016 (TRDOS 386 = TRDOS v2.0)
   229                              <1> 	; 21/05/2011
   230                              <1> 	; 22/08/2009
   231                              <1> 	;
   232                              <1> 	; INPUT ->
   233                              <1> 	;	ESI = Logical DOS Drive Description Table
   234                              <1> 	; OUTPUT ->
   235                              <1> 	;	cf = 1 -> Root directory could not be loaded
   236                              <1> 	;	    EAX > 0 -> Error number
   237                              <1> 	;	cf = 0 -> EAX = 0
   238                              <1> 	;	ECX = Directory buffer size in sectors (CL)
   239                              <1> 	;	EBX = Directory buffer address
   240                              <1> 	; 	NOTE: DirBuffer_Size is in bytes ! (word)
   241                              <1> 	;
   242                              <1> 	; (Modified registers: EAX, ECX, EBX, EDX)
   243                              <1> 
   244                              <1> 	; NOTE: Only for FAT12 and FAT16 file systems !
   245                              <1> 	; (FAT32 fs root dir must be loaded as sub directory)
   246                              <1> 
   247 0000C345 8A1E                <1> 	mov	bl, [esi+LD_Name]
   248 0000C347 8A7E03              <1> 	mov	bh, [esi+LD_FATType]
   249                              <1> 
   250                              <1> 	;mov	[DirBuff_DRV], bl
   251                              <1> 	;mov	[DirBuff_FATType], bh
   252 0000C34A 66891D[2F7F0100]    <1> 	mov	[DirBuff_DRV], bx
   253                              <1> 	
   254                              <1> 	;cmp	bh, 2
   255                              <1> 	;ja	short load_FAT32_root_dir0 ; FAT32 root dir
   256                              <1> 
   257                              <1> load_FAT_root_dir0: ; 23/10/2016
   258 0000C351 0FB75617            <1> 	movzx	edx, word [esi+LD_BPB+RootDirEnts]
   259                              <1> 
   260                              <1> 	;or	dx, dx ; 0 for FAT32 file systems
   261                              <1> 	;jz	short load_FAT32_root_dir0 ; FAT32 root dir
   262                              <1> 	
   263                              <1> 	; 25/07/2022
   264 0000C355 89D0                <1> 	mov	eax, edx
   265 0000C357 6681FA0002          <1> 	cmp	dx, 512 ; Number of Root Dir Entries
   266 0000C35C 740B                <1> 	je	short lrd_mov_ecx_32
   267                              <1> 	;mov	eax, edx ; 25/07/2022
   268                              <1> 	; 23/10/2016
   269 0000C35E 89C1                <1> 	mov	ecx, eax
   270 0000C360 6683C10F            <1> 	add	cx, 15 ; round up 
   271                              <1> 	;shr	cx, 4  ; 16 entries per sector (512/32)
   272                              <1> 	; 25/07/2022
   273 0000C364 C1E904              <1> 	shr	ecx, 4
   274                              <1> 	; ecx = Root directory size in sectors
   275                              <1> 	;;shl	ax, 5 ; Root directory size in bytes
   276                              <1> 	; 25/07/2022
   277                              <1> 	;shl	eax, 5
   278                              <1> 	;;dec	dx    ; Last entry number of root dir
   279                              <1> 	;dec	edx
   280                              <1> 	; cx = Dir Buffer sector count             
   281 0000C367 EB04                <1> 	jmp	short lrd_check_dir_buffer
   282                              <1> 
   283                              <1> lrd_mov_ecx_32:
   284                              <1> 	;mov	ecx, 32
   285                              <1> 	; 25/07/2022
   286 0000C369 29C9                <1> 	sub	ecx, ecx
   287 0000C36B B120                <1> 	mov	cl, 32
   288                              <1> 	;dec	dx ; 511
   289                              <1> 	;mov	ax, 32*512 
   290                              <1> 
   291                              <1> lrd_check_dir_buffer:
   292                              <1> 	; 25/07/2022
   293 0000C36D 4A                  <1> 	dec	edx ; root dir entries - 1
   294 0000C36E C1E005              <1> 	shl	eax, 5 ; * 32
   295                              <1> 	;
   296 0000C371 29DB                <1> 	sub	ebx, ebx ; 0
   297 0000C373 881D[317F0100]      <1> 	mov	[DirBuff_ValidData], bl ; 0
   298 0000C379 668915[347F0100]    <1> 	mov	[DirBuff_LastEntry], dx
   299 0000C380 891D[367F0100]      <1> 	mov	[DirBuff_Cluster], ebx ; 0
   300 0000C386 66A3[3A7F0100]      <1> 	mov	[DirBuffer_Size], ax
   301                              <1> 
   302 0000C38C 8B4664              <1> 	mov	eax, [esi+LD_ROOTBegin]
   303                              <1> read_directory:
   304 0000C38F BB00000800          <1> 	mov	ebx, Directory_Buffer
   305 0000C394 51                  <1> 	push	ecx ; Directory buffer sector count
   306 0000C395 53                  <1> 	push	ebx
   307 0000C396 E80A5A0000          <1> 	call	disk_read
   308 0000C39B 5B                  <1> 	pop	ebx
   309 0000C39C 720B                <1> 	jc	short load_DirBuff_error
   310                              <1> 
   311                              <1> validate_DirBuff_and_return:
   312 0000C39E 59                  <1> 	pop	ecx ; Number of loaded sectors
   313 0000C39F C605[317F0100]01    <1> 	mov	byte [DirBuff_ValidData], 1
   314 0000C3A6 31C0                <1> 	xor	eax, eax ; 0 = no error
   315 0000C3A8 C3                  <1> 	retn
   316                              <1> 
   317                              <1> load_DirBuff_error:
   318 0000C3A9 89C8                <1> 	mov	eax, ecx ; remaining sectors
   319 0000C3AB 59                  <1> 	pop	ecx ; sector count
   320 0000C3AC 29C1                <1> 	sub	ecx, eax ; Number of loaded sectors
   321                              <1> 	; 15/10/2016 (15h -> 17)
   322                              <1> 	;mov	eax, 17 ; DRV NOT READY OR READ ERROR !
   323                              <1> 	; 25/07/2022
   324                              <1> 	;sub	eax, eax
   325 0000C3AE B011                <1> 	mov	al, 17
   326 0000C3B0 F9                  <1> 	stc
   327 0000C3B1 C3                  <1>         retn
   328                              <1> 
   329                              <1> load_FAT32_root_directory:
   330                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   331                              <1> 	; 02/02/2016 (TRDOS 386 = TRDOS v2.0)
   332                              <1> 	;
   333                              <1> 	; INPUT ->
   334                              <1> 	;	ESI = Logical DOS Drive Description Table
   335                              <1> 	; OUTPUT ->
   336                              <1> 	;	cf = 1 -> Root directory could not be loaded
   337                              <1> 	;	    EAX > 0 -> Error number
   338                              <1> 	;	cf = 0 -> EAX = 0
   339                              <1> 	;	ECX = Directory buffer size in sectors (CL)
   340                              <1> 	;	EBX = Directory buffer address
   341                              <1> 	; 	NOTE: DirBuffer_Size is in bytes ! (word)
   342                              <1> 	;
   343                              <1> 	; (Modified registers: EAX, ECX, EBX, EDX)
   344                              <1> 
   345 0000C3B2 8A1E                <1> 	mov	bl, [esi+LD_Name]
   346 0000C3B4 8A7E03              <1> 	mov	bh, [esi+LD_FATType]
   347                              <1> 
   348                              <1> 	;mov	[DirBuff_DRV], bl
   349                              <1> 	;mov	[DirBuff_FATType], bh
   350 0000C3B7 66891D[2F7F0100]    <1> 	mov	[DirBuff_DRV], bx
   351                              <1> 
   352                              <1> load_FAT32_root_dir0:
   353 0000C3BE 8B4632              <1> 	mov	eax, [esi+LD_BPB+FAT32_RootFClust]
   354 0000C3C1 EB0C                <1> 	jmp	short load_FAT_sub_dir0
   355                              <1> 	
   356                              <1> load_FAT_sub_directory:
   357                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   358                              <1> 	; 01/02/2016 (TRDOS 386 = TRDOS v2.0)
   359                              <1> 	; 05/07/2011
   360                              <1> 	; 23/08/2009
   361                              <1> 	;
   362                              <1> 	; INPUT ->
   363                              <1> 	;	ESI = Logical DOS Drive Description Table
   364                              <1> 	;	EAX = Cluster Number
   365                              <1> 	; OUTPUT ->
   366                              <1> 	;	cf = 1 -> Sub directory could not be loaded
   367                              <1> 	;	    EAX > 0 -> Error number
   368                              <1> 	;	cf = 0 -> EAX = 0
   369                              <1> 	;	ECX = Directory buffer size in sectors (CL)
   370                              <1> 	;	EBX = Directory buffer address
   371                              <1> 	;
   372                              <1> 	; 	NOTE: DirBuffer_Size is in bytes ! (word)
   373                              <1> 	;
   374                              <1> 	; (Modified registers: EAX, ECX, EBX, EDX)
   375                              <1> 
   376 0000C3C3 8A1E                <1> 	mov	bl, [esi+LD_Name]
   377 0000C3C5 8A7E03              <1> 	mov	bh, [esi+LD_FATType]
   378                              <1> 
   379                              <1> 	;mov	[DirBuff_DRV], bl
   380                              <1> 	;mov	[DirBuff_FATType], bh
   381 0000C3C8 66891D[2F7F0100]    <1> 	mov	[DirBuff_DRV], bx
   382                              <1> 
   383                              <1> load_FAT_sub_dir0:
   384 0000C3CF 0FB64E13            <1> 	movzx	ecx, byte [esi+LD_BPB+SecPerClust]
   385                              <1> 
   386 0000C3D3 882D[317F0100]      <1> 	mov	[DirBuff_ValidData], ch ; 0
   387 0000C3D9 A3[367F0100]        <1> 	mov	[DirBuff_Cluster], eax
   388                              <1> 
   389 0000C3DE 0FB74611            <1> 	movzx	eax, word [esi+LD_BPB+BytesPerSec]
   390 0000C3E2 F7E1                <1> 	mul	ecx
   391 0000C3E4 C1E805              <1> 	shr	eax, 5 ; directory entry count (dir size / 32)
   392                              <1> 	;dec	ax ; last entry
   393                              <1> 	; 25/07/2022
   394 0000C3E7 48                  <1> 	dec	eax
   395 0000C3E8 66A3[347F0100]      <1> 	mov	[DirBuff_LastEntry], ax
   396                              <1> 
   397 0000C3EE A1[367F0100]        <1> 	mov	eax, [DirBuff_Cluster]
   398 0000C3F3 83E802              <1> 	sub	eax, 2
   399 0000C3F6 F7E1                <1> 	mul	ecx
   400 0000C3F8 034668              <1> 	add	eax, [esi+LD_DATABegin]
   401                              <1> 	; ecx = sectors per cluster (dir buffer size <= 128 sectors)
   402 0000C3FB EB92                <1> 	jmp	short read_directory
   403                              <1> 
   404                              <1> ; DRV_FS.ASM
   405                              <1> 
   406                              <1> ; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   407                              <1> 
   408                              <1> load_current_FS_directory:
   409                              <1> 	;retn
   410                              <1> load_FS_root_directory:
   411                              <1> 	;retn
   412                              <1> load_FS_sub_directory:
   413 0000C3FD C3                  <1> 	retn
   414                              <1> 
   415                              <1> read_cluster:
   416                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   417                              <1> 	; 15/10/2016
   418                              <1> 	; 18/03/2016
   419                              <1> 	; 16/03/2016
   420                              <1> 	; 17/02/2016
   421                              <1> 	; 15/02/2016 (TRDOS 386 = TRDOS v2.0)
   422                              <1> 	;
   423                              <1> 	; INPUT ->
   424                              <1> 	;	EAX = Cluster Number (Sector index for SINGLIX FS)
   425                              <1> 	;	ESI = Logical DOS Drive Description Table address
   426                              <1> 	;	EBX = Cluster (File R/W) Buffer address (max. 64KB)
   427                              <1> 	;	Only for SINGLIX FS:
   428                              <1> 	;	EDX = File Number (The 1st FDT address) 
   429                              <1> 	; OUTPUT ->
   430                              <1> 	;	cf = 1 -> Cluster can not be loaded at the buffer
   431                              <1> 	;	    EAX > 0 -> Error number
   432                              <1> 	;	cf = 0 -> Cluster has been loaded at the buffer
   433                              <1> 	;
   434                              <1> 	; (Modified registers: EAX, ECX, EBX, EDX)
   435                              <1> 	
   436 0000C3FE 0FB64E13            <1> 	movzx	ecx, byte [esi+LD_BPB+BPB_SecPerClust] 
   437                              <1> 	; CL = 1 = [esi+LD_FS_Reserved2] ; SectPerClust for Singlix FS
   438                              <1> 
   439                              <1> read_file_sectors: ; 16/03/2016
   440                              <1> 	;cmp	byte [esi+LD_FATType], 0
   441                              <1> 	; 25/07/2022
   442 0000C402 386E03              <1> 	cmp	[esi+LD_FATType], ch ; 0
   443 0000C405 761C                <1> 	jna	short read_fs_cluster
   444                              <1> 
   445                              <1> read_fat_file_sectors: ; 18/03/2016
   446 0000C407 83E802              <1> 	sub	eax, 2 ; Beginning cluster number is always 2
   447 0000C40A 0FB65613            <1> 	movzx	edx, byte [esi+LD_BPB+BPB_SecPerClust] ; 18/03/2016 
   448 0000C40E F7E2                <1> 	mul	edx
   449 0000C410 034668              <1> 	add	eax, [esi+LD_DATABegin] ; absolute address of the cluster
   450                              <1> 
   451                              <1> 	; EAX = Disk sector address
   452                              <1> 	; ECX = Sector count
   453                              <1> 	; EBX = Buffer address
   454                              <1> 	; (EDX = 0)
   455                              <1> 	; ESI = Logical DOS drive description table address	
   456                              <1> 
   457 0000C413 E88D590000          <1> 	call	disk_read
   458 0000C418 7306                <1> 	jnc	short rclust_retn
   459                              <1> 	
   460                              <1> 	; 15/10/2016 (15h -> 17)
   461 0000C41A B811000000          <1> 	mov	eax, 17 ; Drive not ready or read error !
   462 0000C41F C3                  <1> 	retn
   463                              <1> 
   464                              <1> rclust_retn:
   465 0000C420 29C0                <1> 	sub	eax, eax ; 0
   466 0000C422 C3                  <1> 	retn
   467                              <1> 
   468                              <1> read_fs_cluster:
   469                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   470                              <1> 	; 15/02/2016 (TRDOS 386 = TRDOS v2.0)
   471                              <1> 	; Singlix FS
   472                              <1> 	
   473                              <1> 	; EAX = Cluster number is sector index number of the file (eax)
   474                              <1> 	
   475                              <1> 	; EDX = File number is the first File Descriptor Table address 
   476                              <1> 	;	of the file. (Absolute address of the FDT).
   477                              <1> 	
   478                              <1> 	; eax = sector index (0 for the first sector)
   479                              <1> 	; edx = FDT0 address
   480                              <1> 		; 64 KB buffer = 128 sectors (limit) 
   481                              <1> 	;mov	ecx, 128 ; maximum count of sectors (before eof) 
   482                              <1> 	; 25/07/2022
   483 0000C423 29C9                <1> 	sub	ecx, ecx
   484 0000C425 B180                <1> 	mov	cl, 128
   485                              <1> 	;call	read_fs_sectors
   486                              <1> 	;retn
   487                              <1> 	;jmp	short read_fs_sectors
   488                              <1> 
   489                              <1> read_fs_sectors:
   490                              <1> 	; 15/02/2016 (TRDOS 386 = TRDOS v2.0)
   491 0000C427 F9                  <1> 	stc
   492 0000C428 C3                  <1> 	retn
   493                              <1> 
   494                              <1> get_first_free_cluster:
   495                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   496                              <1> 	; 02/03/2016
   497                              <1> 	; 21/02/2016 (TRDOS 386 = TRDOS v2.0)
   498                              <1> 	; 26/10/2010 (DRV_FAT.ASM, 'proc_get_first_free_cluster')
   499                              <1> 	; 10/07/2010
   500                              <1> 	; INPUT ->
   501                              <1> 	;	ESI = Logical DOS Drive Description Table address
   502                              <1> 	; OUTPUT ->
   503                              <1> 	;	cf = 1 -> Error code in AL (EAX)
   504                              <1> 	;	cf = 0 -> 
   505                              <1> 	;	  EAX = Cluster number 
   506                              <1> 	;	  If EAX = FFFFFFFFh -> no free space
   507                              <1> 	;	If the drive has FAT32 fs:
   508                              <1> 	;	  EBX = FAT32 FSI sector buffer address (if > 0)
   509                              <1> 
   510 0000C429 8B4678              <1> 	mov	eax, [esi+LD_Clusters]
   511 0000C42C 40                  <1> 	inc	eax ; add eax, 1
   512 0000C42D A3[B8810100]        <1> 	mov	[gffc_last_free_cluster], eax
   513                              <1> 
   514 0000C432 31DB                <1> 	xor	ebx, ebx ; 0 ; 02/03/2016
   515                              <1> 
   516 0000C434 807E0302            <1> 	cmp	byte [esi+LD_FATType], 2
   517 0000C438 760E                <1> 	jna	short loc_gffc_get_first_fat_free_cluster0
   518                              <1> 
   519                              <1> loc_gffc_get_first_fat32_free_cluster:
   520                              <1> 	; 02/03/2016
   521 0000C43A E8FF050000          <1> 	call	get_fat32_fsinfo_sector_parms
   522 0000C43F 7207                <1> 	jc	short loc_gffc_get_first_fat_free_cluster0 
   523                              <1> 
   524                              <1> loc_gffc_check_fsinfo_parms:
   525                              <1> 	;;mov	ebx, DOSBootSectorBuff
   526                              <1> 	;cmp	dword [ebx], 41615252h
   527                              <1> 	;jne	short loc_gffc_fat32_fsinfo_err
   528                              <1> 	;cmp	dword [ebx+484], 61417272h
   529                              <1> 	;jne	short loc_gffc_fat32_fsinfo_err
   530                              <1> 	;mov	eax, [ebx+492] ; FSI_Next_Free
   531                              <1> 	;EAX = First free cluster 
   532                              <1> 	;(from FAT32 FSInfo sector)
   533 0000C441 89D0                <1> 	mov	eax, edx ; FSI_Next_Free (First Free Cluster)
   534 0000C443 83F8FF              <1> 	cmp	eax, 0FFFFFFFFh ; invalid (unknown) !
   535 0000C446 7204                <1> 	jb	short loc_gffc_get_first_fat_free_cluster1
   536                              <1> 
   537                              <1> 	; Start from the 1st cluster of the FAT(32) file system
   538                              <1> loc_gffc_get_first_fat_free_cluster0:
   539                              <1> 	;mov	eax, 2
   540                              <1> 	; 25/07/2022
   541 0000C448 29C0                <1> 	sub	eax, eax
   542 0000C44A B002                <1> 	mov	al, 2
   543                              <1> 	;xor	edx, edx
   544                              <1> 
   545                              <1> loc_gffc_get_first_fat_free_cluster1:
   546 0000C44C 53                  <1> 	push	ebx ; 02/03/2016 
   547                              <1> 
   548                              <1> loc_gffc_get_first_fat_free_cluster2:   
   549 0000C44D A3[B4810100]        <1> 	mov	[gffc_first_free_cluster], eax
   550 0000C452 A3[B0810100]        <1> 	mov	[gffc_next_free_cluster], eax
   551                              <1> 
   552                              <1> 	; EBX = FAT32 FSINFO sector buffer address
   553                              <1> 	; (EBX = 0, if the drive has not got FAT32 fs or
   554                              <1> 	; FAT32 FSINFO sector buffer is invalid.)
   555                              <1> 
   556                              <1> loc_gffc_get_first_fat_free_cluster3:
   557 0000C457 E8ABFDFFFF          <1> 	call	get_next_cluster
   558 0000C45C 7307                <1> 	jnc	short loc_gffc_get_first_fat_free_cluster4
   559 0000C45E 09C0                <1> 	or	eax, eax
   560 0000C460 740B                <1> 	jz	short loc_gffc_first_free_fat_cluster_next
   561 0000C462 5B                  <1> 	pop	ebx ; 02/03/2016
   562 0000C463 F5                  <1> 	cmc 	; stc
   563 0000C464 C3                  <1> 	retn
   564                              <1> 
   565                              <1> loc_gffc_get_first_fat_free_cluster4:
   566 0000C465 21C0                <1> 	and	eax, eax ; next cluster value
   567 0000C467 7504                <1> 	jnz	short loc_gffc_first_free_fat_cluster_next
   568 0000C469 89C8                <1> 	mov	eax, ecx ; current (previous cluster) value
   569 0000C46B EB22                <1> 	jmp	short loc_gffc_check_for_set
   570                              <1>  
   571                              <1> loc_gffc_first_free_fat_cluster_next:
   572 0000C46D A1[B0810100]        <1> 	mov	eax, [gffc_next_free_cluster]
   573 0000C472 3B05[B8810100]      <1> 	cmp	eax, [gffc_last_free_cluster]
   574 0000C478 7308                <1> 	jnb	short retn_stc_from_get_first_free_cluster
   575                              <1> pass_gffc_last_cluster_eax_check:
   576 0000C47A 40                  <1> 	inc	eax ; add eax, 1
   577 0000C47B A3[B0810100]        <1> 	mov	[gffc_next_free_cluster], eax
   578 0000C480 EBD5                <1> 	jmp	short loc_gffc_get_first_fat_free_cluster3
   579                              <1> 
   580                              <1> retn_stc_from_get_first_free_cluster:
   581 0000C482 A1[B4810100]        <1> 	mov	eax, [gffc_first_free_cluster]
   582 0000C487 83F802              <1> 	cmp	eax, 2
   583 0000C48A 7709                <1> 	ja	short loc_gffc_check_previous_clusters
   584 0000C48C 29C0                <1> 	sub	eax, eax
   585 0000C48E 48                  <1> 	dec	eax ; FFFFFFFFh
   586                              <1> 
   587                              <1> loc_gffc_check_for_set:
   588                              <1> 	; 02/03/2016
   589 0000C48F 5B                  <1> 	pop	ebx
   590                              <1> 
   591                              <1> 	; EBX = FAT32 FSINFO sector buffer address
   592                              <1> 	; (EBX = 0, if the drive has not got FAT32 fs or
   593                              <1> 	; FAT32 FSINFO sector buffer is invalid.)
   594                              <1> 
   595 0000C490 09DB                <1> 	or	ebx, ebx
   596 0000C492 750D                <1> 	jnz	short loc_gffc_set_ffree_fat32_cluster
   597                              <1> 
   598                              <1> 	;cmp	byte [esi+LD_FATType], 3
   599                              <1> 	;jnb	short loc_gffc_set_ffree_fat32_cluster
   600                              <1> 
   601                              <1> 	;xor	ebx, ebx ; 0
   602                              <1> 
   603                              <1> loc_gffc_retn:
   604 0000C494 C3                  <1> 	retn
   605                              <1> 
   606                              <1> loc_gffc_check_previous_clusters:
   607 0000C495 48                  <1> 	dec	eax ; sub eax, 1
   608 0000C496 A3[B8810100]        <1> 	mov	[gffc_last_free_cluster], eax 
   609                              <1> 	;mov	eax, 2
   610                              <1> 	; 25/07/2022
   611 0000C49B 31C0                <1> 	xor	eax, eax
   612 0000C49D B002                <1> 	mov	al, 2
   613                              <1> 	; eax = 2
   614                              <1> 	;xor	edx, edx
   615 0000C49F EBAC                <1> 	jmp	short loc_gffc_get_first_fat_free_cluster2
   616                              <1> 
   617                              <1> loc_gffc_set_ffree_fat32_cluster:
   618                              <1> 	;call	set_first_free_cluster
   619                              <1> 	;retn
   620                              <1> 	;jmp	short set_first_free_cluster	
   621                              <1> 
   622                              <1> set_first_free_cluster:
   623                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   624                              <1> 	; 15/10/2016
   625                              <1> 	; 23/03/2016
   626                              <1> 	; 02/03/2016
   627                              <1> 	; 29/02/2016
   628                              <1> 	; 26/02/2016
   629                              <1> 	; 21/02/2016 (TRDOS 386 = TRDOS v2.0)
   630                              <1> 	; 21/08/2011 (DRV_FAT.ASM, 'proc_set_first_free_cluster')
   631                              <1> 	; 11/07/2010
   632                              <1> 	; INPUT -> 
   633                              <1> 	;	ESI = Logical DOS Drive Description Table address
   634                              <1> 	;	EAX = First free cluster
   635                              <1> 	;	EBX = FSINFO sector buffer address
   636                              <1> 	;  	;;If EBX > 0, it is FSINFO sector buffer address
   637                              <1> 	;	;;EBX = 0, if FSINFO sector is not loaded
   638                              <1> 	; OUTPUT->
   639                              <1> 	;	ESI = Logical DOS Drive Description Table address
   640                              <1> 	;  	If EBX > 0, it is FSINFO sector buffer address
   641                              <1> 	;	EBX = 0, if FSINFO sector could not be loaded
   642                              <1> 	; 	CF = 1 -> Error code in AL (EAX)
   643                              <1> 	;	CF = 0 -> first free cluster is successfully updated 
   644                              <1> 
   645                              <1> 	;cmp	byte [esi+LD_FATType], 3
   646                              <1> 	;jb	short loc_sffc_invalid_drive
   647                              <1> 
   648                              <1> 	; Save First Free Cluster value for 'update_cluster'
   649 0000C4A1 89463E              <1> 	mov	[esi+LD_BPB+BPB_Reserved+4], eax ; First free Cluster	
   650                              <1> 
   651                              <1> 	;or	ebx, ebx
   652                              <1> 	;jnz	short loc_sffc_read_fsinfo_sector
   653                              <1> 
   654 0000C4A4 813B52526141        <1> 	cmp     dword [ebx], 41615252h
   655 0000C4AA 753C                <1> 	jne	short loc_sffc_read_fsinfo_sector
   656 0000C4AC 81BBE4010000727241- <1> 	cmp	dword [ebx+484], 61417272h
   656 0000C4B5 61                  <1>
   657 0000C4B6 7530                <1> 	jne	short loc_sffc_read_fsinfo_sector
   658                              <1> 
   659 0000C4B8 3B83EC010000        <1> 	cmp	eax, [ebx+492]  ; FSI_Next_Free
   660 0000C4BE 741E                <1> 	je	short loc_sffc_retn
   661                              <1> 
   662                              <1> loc_sffc_write_fsinfo_sector:
   663                              <1> 	; EBX = FSINFO sector buffer
   664                              <1> 	; [CFS_FAT32FSINFOSEC] is set in 'get_fat32_fsinfo_sector_parms'
   665 0000C4C0 8983EC010000        <1> 	mov	[ebx+492], eax
   666 0000C4C6 A1[C8810100]        <1> 	mov	eax, [CFS_FAT32FSINFOSEC] 
   667                              <1> 	;mov	ecx, 1
   668                              <1> 	; 25/07/2022
   669 0000C4CB 31C9                <1> 	xor	ecx, ecx
   670 0000C4CD FEC1                <1> 	inc	cl
   671                              <1> 	; ecx = 1
   672 0000C4CF 53                  <1> 	push	ebx
   673 0000C4D0 E8C1580000          <1> 	call	disk_write
   674 0000C4D5 7208                <1> 	jc      short loc_sffc_read_fsinfo_sector_err1
   675 0000C4D7 5B                  <1> 	pop	ebx
   676                              <1> 
   677 0000C4D8 8B83EC010000        <1> 	mov	eax, [ebx+492] ; First (Next) Free Cluster
   678                              <1> 
   679                              <1> loc_sffc_retn:
   680 0000C4DE C3                  <1> 	retn
   681                              <1> 
   682                              <1> ;loc_sffc_invalid_drive:
   683                              <1> ;	mov	eax, 0Fh ; MSDOS Error : Invalid drive
   684                              <1> ;	push	edx
   685                              <1> 
   686                              <1> loc_sffc_read_fsinfo_sector_err1:
   687                              <1> 	; 25/07/2022
   688                              <1> 	;mov	ebx, 0
   689                              <1> 	; 15/10/2016 (1Dh -> 18)
   690                              <1> 	; 23/03/2016 (1Dh)
   691                              <1> 	;mov	eax, 18 ; Drive not ready or write error
   692 0000C4DF 31C0                <1> 	xor	eax, eax
   693 0000C4E1 89C3                <1> 	mov	ebx, eax ; 0
   694 0000C4E3 B012                <1> 	mov	al, 18	
   695 0000C4E5 F9                  <1> 	stc
   696                              <1> loc_sffc_read_fsinfo_sector_err2:
   697 0000C4E6 5A                  <1> 	pop	edx
   698 0000C4E7 C3                  <1> 	retn
   699                              <1> 	
   700                              <1> loc_sffc_read_fsinfo_sector:
   701 0000C4E8 50                  <1> 	push	eax
   702                              <1> 
   703 0000C4E9 E850050000          <1> 	call	get_fat32_fsinfo_sector_parms
   704 0000C4EE 72F6                <1> 	jc	short loc_sffc_read_fsinfo_sector_err2
   705                              <1> 
   706 0000C4F0 58                  <1> 	pop	eax
   707                              <1> 	; EDX = First (Next) Free Cluster value from FSINFO sector
   708                              <1> 	; EAX = First Free Cluster value from 'get_next_cluster'
   709                              <1> 	; (edx = old value)
   710 0000C4F1 39D0                <1> 	cmp	eax, edx ; First free Cluster (eax = new value) 
   711 0000C4F3 75CB                <1> 	jne	short loc_sffc_write_fsinfo_sector
   712                              <1> 
   713 0000C4F5 C3                  <1> 	retn	
   714                              <1> 
   715                              <1> update_cluster:
   716                              <1> 	; 07/08/2022
   717                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
   718                              <1> 	; 23/10/2016
   719                              <1> 	; 23/03/2016
   720                              <1> 	; 02/03/2016
   721                              <1> 	; 01/03/2016
   722                              <1> 	; 29/02/2016
   723                              <1> 	; 27/02/2016
   724                              <1> 	; 26/02/2016
   725                              <1> 	; 22/02/2016 (TRDOS 386 = TRDOS v2.0)
   726                              <1> 	; 11/08/2011  
   727                              <1> 	; 09/02/2005
   728                              <1> 	; INPUT ->
   729                              <1> 	;	EAX = Cluster Number
   730                              <1> 	;	ECX = New Cluster Value
   731                              <1> 	;	ESI = Logical Dos Drive Parameters Table
   732                              <1> 	;
   733                              <1> 	;	/// dword [FAT_ClusterCounter] ///
   734                              <1> 	;
   735                              <1> 	; OUTPUT ->
   736                              <1> 	;	cf = 0 -> No Error, EAX is valid
   737                              <1> 	;	cf = 1 & EAX = 0 -> End Of Cluster Chain
   738                              <1> 	; 	cf = 1 & EAX > 0 -> Error
   739                              <1> 	;		(ECX -> any value)
   740                              <1> 	; 	EAX = Next Cluster
   741                              <1> 	;	ECX = New Cluster Value
   742                              <1> 	;
   743                              <1> 	;	/// [FAT_ClusterCounter] is updated,
   744                              <1> 	;	/// decreased when a free cluster is assigned,
   745                              <1> 	;	/// increased if an assigned cluster is freed.	
   746                              <1> 	;		
   747                              <1> 	;
   748                              <1> 	; (Modified registers: EAX, EBX, -ECX-, EDX)
   749                              <1> 	
   750 0000C4F6 A3[1A7F0100]        <1> 	mov	[FAT_CurrentCluster], eax
   751 0000C4FB 890D[BC810100]      <1> 	mov	[ClusterValue], ecx
   752                              <1> 
   753                              <1> loc_update_cluster_check_fat_buffer:
   754 0000C501 8A1E                <1> 	mov	bl, [esi+LD_Name]
   755 0000C503 381D[1F7F0100]      <1> 	cmp	[FAT_BuffDrvName], bl
   756 0000C509 7418                <1> 	je	short loc_update_cluster_check_fat_type
   757 0000C50B 803D[1E7F0100]02    <1> 	cmp	byte [FAT_BuffValidData], 2
   758                              <1> 	;je	loc_uc_save_fat_buffer
   759                              <1> 	; 25/07/2022
   760 0000C512 7502                <1> 	jne	short loc_uc_reset_fat_buffer_validation
   761 0000C514 EB65                <1> 	jmp	loc_uc_save_fat_buffer
   762                              <1> 
   763                              <1> loc_uc_reset_fat_buffer_validation:
   764 0000C516 C605[1E7F0100]00    <1> 	mov	byte [FAT_BuffValidData], 0
   765                              <1> 
   766                              <1> loc_uc_check_fat_type_reset_drvname:
   767 0000C51D 881D[1F7F0100]      <1> 	mov	[FAT_BuffDrvName], bl
   768                              <1> 
   769                              <1> loc_update_cluster_check_fat_type:
   770 0000C523 29D2                <1> 	sub	edx, edx ; 26/02/2016
   771 0000C525 8A5E03              <1> 	mov	bl, [esi+LD_FATType]
   772 0000C528 83F802              <1> 	cmp	eax, 2
   773 0000C52B 721D                <1>         jb	short update_cluster_inv_data
   774 0000C52D 80FB02              <1> 	cmp	bl, 2 
   775                              <1>         ;ja	update_fat32_cluster
   776                              <1> 	; 25/07/2022
   777 0000C530 7605                <1> 	jna	short loc_uc_check_fat_type_1
   778 0000C532 E98D010000          <1> 	jmp	update_fat32_cluster
   779                              <1> 
   780                              <1> loc_uc_check_fat_type_1:
   781                              <1> 	;cmp	bl, 1
   782                              <1> 	;jb	short update_cluster_inv_data
   783 0000C537 8B4E78              <1> 	mov	ecx, [esi+LD_Clusters]
   784 0000C53A 41                  <1> 	inc	ecx  
   785 0000C53B 890D[2A7F0100]      <1> 	mov	[LastCluster], ecx
   786 0000C541 39C8                <1> 	cmp	eax, ecx ; dword [LastCluster]
   787                              <1> 	;ja	return_uc_fat_stc
   788                              <1> 	; 25/07/2022
   789 0000C543 7608                <1> 	jna	short loc_uc_check_fat_type_2
   790 0000C545 E9D6000000          <1> 	jmp	return_uc_fat_stc
   791                              <1> 
   792                              <1> 	; 25/07/2022
   793                              <1> update_cluster_inv_data:
   794                              <1> 	;mov	eax, 0Dh
   795 0000C54A B00D                <1> 	mov	al, 0Dh  ; Invalid Data
   796 0000C54C C3                  <1> 	retn 
   797                              <1> 
   798                              <1> loc_uc_check_fat_type_2:
   799                              <1> 	; TRDOS v1 has a FATal bug here ! 
   800                              <1> 		; or bl, bl ; cmp bl, 0
   801                              <1> 		; jz short update_fat12_cluster
   802                              <1> 	; !! It would destroy FAT12 floppy disk fs here !!
   803                              <1> 	; ('A:' disks of TRDOS v1 operating system project
   804                              <1> 	; had 'singlix fs', so, I could not differ this mistake
   805                              <1> 	; on a drive 'A:')
   806 0000C54D 80FB01              <1> 	cmp	bl, 1 ; correct comparison is this !
   807                              <1> 	;jna	update_fat12_cluster
   808                              <1> 	; 25/07/2022
   809 0000C550 7705                <1> 	ja	short update_fat16_cluster
   810 0000C552 E9CE000000          <1> 	jmp	update_fat12_cluster	 
   811                              <1> 
   812                              <1> update_fat16_cluster:
   813                              <1> pass_uc_fat16_errc:
   814                              <1> 	;sub	edx, edx
   815 0000C557 BB00030000          <1> 	mov	ebx, 300h ;768
   816 0000C55C F7F3                <1> 	div	ebx
   817                              <1> 	; EAX = Count of 3 FAT sectors
   818                              <1> 	; DX = Cluster offset in FAT buffer
   819                              <1> 	;mov	bx, dx  
   820                              <1> 	; 25/07/2022
   821 0000C55E 89D3                <1> 	mov	ebx, edx
   822                              <1> 	;shl	bx, 1 ; Multiply by 2
   823                              <1> 	; 25/07/2022
   824 0000C560 D1E3                <1> 	shl	ebx, 1
   825 0000C562 66BA0300            <1> 	mov	dx, 3
   826 0000C566 F7E2                <1> 	mul	edx  
   827                              <1> 	; EAX = FAT Sector
   828                              <1> 	; EDX = 0
   829                              <1> 	; EBX = Byte offset in FAT buffer
   830 0000C568 8A0D[1E7F0100]      <1> 	mov	cl, [FAT_BuffValidData]
   831 0000C56E 80F902              <1> 	cmp	cl, 2
   832 0000C571 7518                <1> 	jne	short loc_uc_check_fat16_buff_sector_load
   833                              <1> 
   834                              <1> loc_uc_check_fat16_buff_sector_save:
   835 0000C573 3B05[227F0100]      <1> 	cmp	eax, [FAT_BuffSector]
   836                              <1> 	;jne	short loc_uc_save_fat_buffer
   837                              <1> 	;jmp	short loc_update_fat16_cell
   838                              <1> 	; 07/08/2022
   839 0000C579 741D                <1> 	je	short loc_update_fat16_cell
   840                              <1> 	;jmp	loc_uc_save_fat_buffer
   841                              <1> 	
   842                              <1> 	; 07/08/2022
   843                              <1> loc_uc_save_fat_buffer:
   844                              <1> 	; byte [FAT_BuffValidData] = 2 
   845 0000C57B E8F9010000          <1> 	call	save_fat_buffer
   846 0000C580 7267                <1>         jc      short loc_fat_sectors_rw_error2
   847                              <1> 	;mov	byte [FAT_BuffValidData], 1
   848 0000C582 A1[1A7F0100]        <1> 	mov	eax, [FAT_CurrentCluster]
   849                              <1> 	;mov	ecx, [ClusterValue]
   850                              <1> 	;jmp	short loc_update_cluster_check_fat_buffer
   851 0000C587 8A1E                <1> 	mov	bl, [esi+LD_Name] ; 01/03/2016
   852 0000C589 EB8B                <1>         jmp     loc_uc_reset_fat_buffer_validation
   853                              <1> 
   854                              <1> loc_uc_check_fat16_buff_sector_load:
   855 0000C58B 80F901              <1> 	cmp	cl, 1 ; byte [FAT_BuffValidData]
   856 0000C58E 7560                <1>         jne     short loc_uc_load_fat_sectors
   857 0000C590 3B05[227F0100]      <1> 	cmp	eax, [FAT_BuffSector]
   858 0000C596 7558                <1>         jne     short loc_uc_load_fat_sectors
   859                              <1> 
   860                              <1> loc_update_fat16_cell:
   861                              <1> loc_update_fat16_buffer:
   862 0000C598 81C3001C0900        <1> 	add	ebx, FAT_Buffer ; 26/02/2016
   863                              <1> 	;movzx	eax, word [ebx]
   864 0000C59E 668B03              <1> 	mov	ax, [ebx]
   865                              <1> 	; 01/03/2016
   866 0000C5A1 89C2                <1> 	mov	edx, eax ; old value of the cluster
   867 0000C5A3 A3[1A7F0100]        <1> 	mov	[FAT_CurrentCluster], eax
   868 0000C5A8 8B0D[BC810100]      <1> 	mov	ecx, [ClusterValue] ; 32 bits
   869 0000C5AE 66890B              <1> 	mov	[ebx], cx ; 16 bits !
   870                              <1> 
   871 0000C5B1 C605[1E7F0100]02    <1> 	mov	byte [FAT_BuffValidData], 2
   872                              <1> 	
   873 0000C5B8 6683F802            <1> 	cmp	ax, 2
   874 0000C5BC 7262                <1> 	jb	short return_uc_fat16_stc
   875 0000C5BE 3B05[2A7F0100]      <1> 	cmp	eax, [LastCluster]
   876 0000C5C4 775A                <1> 	ja	short return_uc_fat16_stc
   877                              <1> 
   878                              <1> loc_fat_buffer_updated:
   879                              <1> 	; 01/03/2016
   880 0000C5C6 F8                  <1> 	clc
   881                              <1> loc_fat_buffer_stc_1:
   882 0000C5C7 9C                  <1> 	pushf
   883 0000C5C8 21C9                <1> 	and	ecx, ecx
   884 0000C5CA 7506                <1> 	jnz	short loc_fat_buffer_updated_1
   885                              <1> 
   886                              <1> 	; 01/03/2016 
   887                              <1> 	; new value of the cluster = 0 (free)
   888                              <1> 	; increase free(d) cluster count
   889 0000C5CC FF05[267F0100]      <1> 	inc	dword [FAT_ClusterCounter]
   890                              <1> 
   891                              <1> loc_fat_buffer_updated_1: ; new value of the cluster > 0
   892 0000C5D2 09D2                <1> 	or	edx, edx ; 02/03/2016
   893 0000C5D4 7506                <1> 	jnz	short loc_fat_buffer_updated_2
   894                              <1> 	; old value of the cluster = 0 (it was free cluster)
   895                              <1> 	; decrease free(d) cluster count
   896 0000C5D6 FF0D[267F0100]      <1> 	dec	dword [FAT_ClusterCounter] ; it may be negative number
   897                              <1> 
   898                              <1> loc_fat_buffer_updated_2:
   899 0000C5DC 9D                  <1> 	popf
   900 0000C5DD C3                  <1> 	retn
   901                              <1> 
   902                              <1> 	; 25/07/2022
   903                              <1> loc_fat_sectors_rw_error1:
   904                              <1> 	;mov	byte [FAT_BuffValidData], 0
   905                              <1> 	; 23/10/2016 (15h -> 17)
   906                              <1> 	; 23/03/2016
   907 0000C5DE B811000000          <1> 	mov	eax, 17 ; Drive not ready or read error
   908 0000C5E3 8825[1E7F0100]      <1> 	mov	[FAT_BuffValidData], ah ; 0
   909                              <1> 
   910                              <1> loc_fat_sectors_rw_error2:
   911                              <1> 	;mov	eax, error code
   912                              <1> 	;mov	edx, 0
   913 0000C5E9 8B0D[BC810100]      <1> 	mov	ecx, [ClusterValue]
   914 0000C5EF C3                  <1> 	retn
   915                              <1> 
   916                              <1> 	; 25/07/2022
   917                              <1> loc_uc_load_fat_sectors:
   918 0000C5F0 A3[227F0100]        <1> 	mov	[FAT_BuffSector], eax
   919                              <1> 
   920                              <1> load_uc_fat_sectors_zero:
   921 0000C5F5 034660              <1> 	add	eax, [esi+LD_FATBegin]
   922 0000C5F8 BB001C0900          <1> 	mov	ebx, FAT_Buffer
   923 0000C5FD B903000000          <1> 	mov	ecx, 3
   924 0000C602 E89E570000          <1> 	call	disk_read
   925 0000C607 72D5                <1> 	jc	short loc_fat_sectors_rw_error1
   926                              <1> 
   927 0000C609 C605[1E7F0100]01    <1>         mov     byte [FAT_BuffValidData], 1
   928 0000C610 A1[1A7F0100]        <1> 	mov 	eax, [FAT_CurrentCluster]
   929 0000C615 8B0D[BC810100]      <1> 	mov	ecx, [ClusterValue]
   930 0000C61B E903FFFFFF          <1>         jmp     loc_update_cluster_check_fat_type
   931                              <1> 
   932                              <1> return_uc_fat16_stc:
   933                              <1> 	; 25/07/2022
   934                              <1> return_uc_fat_stc:
   935                              <1> 	; 01/03/2016
   936 0000C620 31C0                <1> 	xor	eax, eax
   937 0000C622 F9                  <1> 	stc
   938 0000C623 EBA2                <1> 	jmp	short loc_fat_buffer_stc_1
   939                              <1> 
   940                              <1> update_fat12_cluster:
   941                              <1> pass_uc_fat12_errc:
   942                              <1> 	;sub	edx, edx
   943 0000C625 BB00040000          <1> 	mov	ebx, 400h ;1024
   944 0000C62A F7F3                <1> 	div	ebx
   945                              <1> 	; EAX = Count of 3 FAT sectors
   946                              <1> 	; DX = Cluster offset in FAT buffer
   947                              <1> 	;mov	cx, 3
   948                              <1> 	; 25/07/2022
   949 0000C62C 29C9                <1> 	sub	ecx, ecx
   950 0000C62E B103                <1> 	mov	cl, 3
   951                              <1> 	; ecx = 3
   952                              <1> 	;mov	bx, ax
   953 0000C630 89C3                <1> 	mov	ebx, eax
   954                              <1> 	;mov	ax, cx ; 3
   955 0000C632 89C8                <1> 	mov	eax, ecx
   956                              <1> 	;mul	dx     ; Multiply by 3
   957 0000C634 F7E2                <1> 	mul	edx
   958                              <1> 	;shr	ax, 1  ; Divide by 2
   959 0000C636 D1E8                <1> 	shr	eax, 1
   960                              <1> 	;xchg	bx, ax
   961 0000C638 93                  <1> 	xchg	ebx, eax
   962                              <1> 	; EAX = Count of 3 FAT sectors
   963                              <1> 	; EBX = Byte Offset in FAT buffer   
   964                              <1> 	;mul	cx  ; 3 * AX
   965 0000C639 F7E1                <1> 	mul	ecx ; 3 * EAX
   966                              <1> 	; EAX = FAT Beginning Sector
   967                              <1> 	; EDX = 0
   968 0000C63B 8A0D[1E7F0100]      <1> 	mov	cl, [FAT_BuffValidData]
   969                              <1> 	; TRDOS v1 has a FATal bug here ! 
   970                              <1> 	; (it does not have 'cmp cl, 2' instruction here !
   971                              <1> 	;  while 'jne' is existing !)
   972 0000C641 80F902              <1> 	cmp	cl, 2 ; 2 = dirty buffer (must be written to disk)
   973 0000C644 750D                <1> 	jne	short loc_uc_check_fat12_buff_sector_load
   974                              <1> 
   975                              <1> loc_uc_check_fat12_buff_sector_save:
   976 0000C646 3B05[227F0100]      <1> 	cmp	eax, [FAT_BuffSector]
   977                              <1>         ;jne	short loc_uc_save_fat_buffer
   978                              <1> 	;jmp	short loc_update_fat12_cell
   979                              <1> 	; 07/08/2022
   980 0000C64C 7412                <1> 	je	short loc_update_fat12_cell
   981 0000C64E E928FFFFFF          <1> 	jmp	loc_uc_save_fat_buffer
   982                              <1> 
   983                              <1> loc_uc_check_fat12_buff_sector_load:
   984 0000C653 80F901              <1> 	cmp	cl, 1 ; byte ptr [FAT_BuffValidData]
   985 0000C656 7598                <1>         jne     short loc_uc_load_fat_sectors
   986 0000C658 3B05[227F0100]      <1> 	cmp	eax, [FAT_BuffSector]
   987 0000C65E 7590                <1> 	jne	short loc_uc_load_fat_sectors
   988                              <1> 	; 07/08/2022
   989                              <1> 	;je	short loc_update_fat12_cell
   990                              <1> 	;jmp	loc_uc_load_fat_sectors
   991                              <1> 
   992                              <1> loc_update_fat12_cell:
   993 0000C660 81C3001C0900        <1> 	add	ebx, FAT_Buffer ; 26/02/2016
   994                              <1> 	;mov	cx, [FAT_CurrentCluster]
   995                              <1> 	; 25/07/2022
   996 0000C666 8B0D[1A7F0100]      <1> 	mov	ecx, [FAT_CurrentCluster] 
   997                              <1> 	;shr	cx, 1
   998                              <1> 	; 25/07/2022
   999 0000C66C D1E9                <1> 	shr	ecx, 1
  1000 0000C66E 668B03              <1> 	mov	ax, [ebx]
  1001                              <1> 	;mov	dx, ax
  1002 0000C671 89C2                <1> 	mov	edx, eax ; 25/07/2022
  1003 0000C673 7336                <1> 	jnc	short uc_fat12_nc_even
  1004                              <1> 
  1005                              <1> 	;and	ax, 0Fh
  1006                              <1> 	; 25/07/2022
  1007 0000C675 240F                <1> 	and	al, 0Fh
  1008 0000C677 8B0D[BC810100]      <1> 	mov	ecx, [ClusterValue] ; 32 bits
  1009                              <1> 	;shl	cx, 4
  1010 0000C67D C1E104              <1> 	shl	ecx, 4
  1011                              <1> 	;or	cx, ax
  1012 0000C680 08C1                <1> 	or	cl, al ; 25/07/2022
  1013                              <1> 	;mov	ax, dx
  1014 0000C682 89D0                <1> 	mov	eax, edx
  1015 0000C684 66890B              <1> 	mov	[ebx], cx  ; 16 bits !
  1016                              <1> 	;shr	ax, 4 ; al(bit4..7)+ah(bit0..7)
  1017                              <1> 	; 25/07/2022
  1018 0000C687 C1E804              <1> 	shr	eax, 4
  1019                              <1> 
  1020                              <1> update_fat12_buffer:
  1021 0000C68A A3[1A7F0100]        <1> 	mov	[FAT_CurrentCluster], eax
  1022 0000C68F 89C2                <1> 	mov	edx, eax ; 01/03/2016
  1023 0000C691 C605[1E7F0100]02    <1> 	mov	byte [FAT_BuffValidData], 2
  1024 0000C698 6683F802            <1> 	cmp	ax, 2
  1025 0000C69C 725E                <1>         jb      short return_uc_fat12_stc
  1026 0000C69E 3B05[2A7F0100]      <1> 	cmp	eax, [LastCluster]
  1027 0000C6A4 7756                <1>         ja      short return_uc_fat12_stc
  1028 0000C6A6 E91BFFFFFF          <1>         jmp     loc_fat_buffer_updated
  1029                              <1> 
  1030                              <1> uc_fat12_nc_even:
  1031 0000C6AB 662500F0            <1> 	and	ax, 0F000h
  1032 0000C6AF 8B0D[BC810100]      <1> 	mov	ecx, [ClusterValue] ; 32 bits
  1033 0000C6B5 80E50F              <1> 	and	ch, 0Fh
  1034                              <1> 	;or	cx, ax
  1035                              <1> 	; 25/07/2022
  1036 0000C6B8 09C1                <1> 	or	ecx, eax
  1037                              <1> 	;mov	ax, dx
  1038 0000C6BA 89D0                <1> 	mov	eax, edx
  1039 0000C6BC 66890B              <1> 	mov	[ebx], cx ; 16 bits !
  1040 0000C6BF 80E40F              <1> 	and	ah, 0Fh ; al(bit0..7)+ah(bit0..3)
  1041 0000C6C2 EBC6                <1> 	jmp	short update_fat12_buffer
  1042                              <1> 
  1043                              <1> update_fat32_cluster:
  1044 0000C6C4 8B4E78              <1> 	mov	ecx, [esi+LD_Clusters]
  1045 0000C6C7 41                  <1> 	inc	ecx
  1046 0000C6C8 890D[2A7F0100]      <1> 	mov	[LastCluster], ecx
  1047                              <1> 
  1048 0000C6CE 39C8                <1> 	cmp	eax, ecx
  1049 0000C6D0 772A                <1>         ja      short return_uc_fat32_stc ; 25/07/2022
  1050                              <1> 
  1051                              <1> pass_uc_fat32_errc:
  1052                              <1> 	;sub	edx, edx
  1053 0000C6D2 BB80010000          <1> 	mov	ebx, 180h ;384
  1054 0000C6D7 F7F3                <1> 	div	ebx
  1055                              <1> 	; EAX = Count of 3 FAT sectors
  1056                              <1> 	; DX = Cluster offset in FAT buffer
  1057 0000C6D9 89D3                <1> 	mov	ebx, edx
  1058 0000C6DB C1E302              <1> 	shl	ebx, 2 ; Multiply by 4
  1059                              <1> 	;mov	edx, 3	
  1060                              <1> 	; 25/07/2022
  1061                              <1> 	;xor	dh, dh
  1062                              <1> 	;mov	dl, 3
  1063 0000C6DE 66BA0300            <1> 	mov	dx, 3
  1064 0000C6E2 F7E2                <1> 	mul	edx
  1065                              <1> 	; EBX = Cluster Offset in FAT buffer
  1066                              <1> 	; EAX = FAT Sector
  1067                              <1> 	; EDX = 0
  1068 0000C6E4 8A0D[1E7F0100]      <1> 	mov	cl, [FAT_BuffValidData]
  1069 0000C6EA 80F902              <1> 	cmp	cl, 2
  1070 0000C6ED 7515                <1> 	jne	short loc_uc_check_fat32_buff_sector_load
  1071                              <1> 
  1072                              <1> loc_uc_check_fat32_buff_sector_save:
  1073 0000C6EF 3B05[227F0100]      <1> 	cmp	eax, [FAT_BuffSector]
  1074                              <1> 	;jne	loc_uc_save_fat_buffer
  1075                              <1> 	;jmp	short loc_update_fat32_cell
  1076                              <1> 	; 25/07/2022
  1077 0000C6F5 741F                <1> 	je	short loc_update_fat32_cell
  1078 0000C6F7 E97FFEFFFF          <1> 	jmp	loc_uc_save_fat_buffer
  1079                              <1> 
  1080                              <1> return_uc_fat12_stc:
  1081                              <1> return_uc_fat32_stc:
  1082                              <1> 	; 25/07/2022
  1083 0000C6FC 29C0                <1> 	sub	eax, eax
  1084 0000C6FE F9                  <1> 	stc
  1085 0000C6FF E9C3FEFFFF          <1> 	jmp	loc_fat_buffer_stc_1
  1086                              <1> 
  1087                              <1> loc_uc_check_fat32_buff_sector_load:
  1088 0000C704 80F901              <1> 	cmp	cl, 1 ; byte [FAT_BuffValidData]
  1089                              <1> 	;jne	loc_uc_load_fat_sectors
  1090                              <1> 	; 25/07/2022
  1091 0000C707 7508                <1> 	jne	short loc_uc_load_fat_sects
  1092 0000C709 3B05[227F0100]      <1> 	cmp	eax, [FAT_BuffSector]
  1093                              <1> 	;jne	loc_uc_load_fat_sectors
  1094                              <1> 	; 25/07/2022
  1095 0000C70F 7405                <1> 	je	short loc_update_fat32_cell
  1096                              <1> loc_uc_load_fat_sects:
  1097 0000C711 E9DAFEFFFF          <1> 	jmp	loc_uc_load_fat_sectors	
  1098                              <1> 
  1099                              <1> loc_update_fat32_cell:
  1100                              <1> loc_update_fat32_buffer:
  1101 0000C716 81C3001C0900        <1> 	add	ebx, FAT_Buffer ; 26/02/2016
  1102 0000C71C 8B03                <1> 	mov	eax, [ebx]
  1103 0000C71E 25FFFFFF0F          <1> 	and	eax, 0FFFFFFFh ; 28 bit cluster value
  1104                              <1> 	
  1105 0000C723 8B15[1A7F0100]      <1> 	mov	edx, [FAT_CurrentCluster] ; 01/03/2016
  1106                              <1> 
  1107 0000C729 A3[1A7F0100]        <1> 	mov 	[FAT_CurrentCluster], eax
  1108 0000C72E 8B0D[BC810100]      <1> 	mov	ecx, [ClusterValue]
  1109 0000C734 890B                <1> 	mov	[ebx], ecx ; 29/02/2016 
  1110                              <1> 
  1111 0000C736 C605[1E7F0100]02    <1> 	mov	byte [FAT_BuffValidData], 2
  1112                              <1> 
  1113                              <1> 	; 01/03/2016
  1114 0000C73D 21C0                <1> 	and	eax, eax ; was it free cluster ?
  1115 0000C73F 7513                <1> 	jnz	short loc_upd_fat32_c0
  1116                              <1> 
  1117                              <1> 	;or	ecx, ecx ; it will be left free ?!
  1118                              <1> 	;jz	short loc_upd_fat32_c3
  1119                              <1> 
  1120 0000C741 3B563E              <1> 	cmp	edx, [esi+LD_BPB+BPB_Reserved+4] ; First free cluster
  1121 0000C744 751F                <1> 	jne	short loc_upd_fat32_c3
  1122                              <1> 
  1123 0000C746 3B15[2A7F0100]      <1> 	cmp	edx, [LastCluster]
  1124 0000C74C 7206                <1> 	jb	short loc_upd_fat32_c0
  1125                              <1> 
  1126                              <1> 	;mov	edx, 2 ; rewind !
  1127                              <1> 	; 25/07/2022
  1128 0000C74E 29D2                <1> 	sub	edx, edx
  1129 0000C750 B202                <1> 	mov	dl, 2
  1130 0000C752 EB0E                <1> 	jmp	short loc_upd_fat32_c2
  1131                              <1> 
  1132                              <1> loc_upd_fat32_c0:
  1133 0000C754 FF463E              <1> 	inc	dword [esi+LD_BPB+BPB_Reserved+4] ; set it to next cluster		
  1134 0000C757 EB0C                <1> 	jmp	short loc_upd_fat32_c3
  1135                              <1> 
  1136                              <1> loc_upd_fat32_c1:
  1137 0000C759 09C9                <1> 	or	ecx, ecx ; will it be free cluster ?
  1138 0000C75B 7508                <1> 	jnz	short loc_upd_fat32_c3
  1139                              <1> 
  1140 0000C75D 3B563E              <1> 	cmp	edx, [esi+LD_BPB+BPB_Reserved+4] ; First free cluster
  1141 0000C760 7303                <1> 	jnb	short loc_upd_fat32_c3
  1142                              <1> 
  1143                              <1> loc_upd_fat32_c2:	
  1144 0000C762 89563E              <1> 	mov	[esi+LD_BPB+BPB_Reserved+4], edx			
  1145                              <1> 
  1146                              <1> loc_upd_fat32_c3:
  1147 0000C765 89C2                <1> 	mov	edx, eax
  1148                              <1> 
  1149                              <1> loc_upd_fat32_c4:
  1150 0000C767 83F802              <1> 	cmp	eax, 2
  1151 0000C76A 7290                <1> 	jb	short return_uc_fat32_stc ; 25/07/2022 
  1152                              <1> 
  1153                              <1> pass_uc_fat32_c_zero_check_2:
  1154 0000C76C 3B05[2A7F0100]      <1> 	cmp	eax, [LastCluster]
  1155 0000C772 7788                <1> 	ja	short return_uc_fat32_stc ; 25/07/2022
  1156                              <1> 	
  1157 0000C774 E94DFEFFFF          <1> 	jmp     loc_fat_buffer_updated
  1158                              <1> 
  1159                              <1> 
  1160                              <1> save_fat_buffer:
  1161                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
  1162                              <1> 	; 15/10/2016
  1163                              <1> 	; 01/03/2016
  1164                              <1> 	; 22/02/2016 (TRDOS 386 = TRDOS v2.0)
  1165                              <1> 	; 11/08/2011
  1166                              <1> 	; 09/02/2005 
  1167                              <1> 	; INPUT ->
  1168                              <1> 	;	None
  1169                              <1> 	; OUTPUT ->
  1170                              <1> 	;	cf = 0 -> OK.
  1171                              <1> 	;	cf = 1 -> error code in AL (EAX)
  1172                              <1> 	;
  1173                              <1> 	;	EBX = FAT_Buffer address
  1174                              <1> 	;
  1175                              <1> 	; (EAX, EDX, ECX will be modified)
  1176                              <1> 
  1177                              <1> 	;cmp	byte [FAT_BuffValidData], 2 
  1178                              <1> 	;je	short loc_save_fat_buff
  1179                              <1> 
  1180                              <1> ;loc_save_fat_buffer_retn:
  1181                              <1> ;	xor	eax, eax
  1182                              <1> ;	retn
  1183                              <1> 
  1184                              <1> loc_save_fat_buff:
  1185 0000C779 31D2                <1> 	xor	edx, edx
  1186 0000C77B 8A35[1F7F0100]      <1> 	mov	dh, [FAT_BuffDrvName]
  1187 0000C781 80FE41              <1> 	cmp	dh, 'A'
  1188 0000C784 7252                <1> 	jb	short loc_save_fat_buffer_inv_data_retn
  1189 0000C786 80EE41              <1> 	sub	dh, 'A'
  1190 0000C789 56                  <1> 	push	esi ; *
  1191 0000C78A BE00010900          <1>         mov     esi, Logical_DOSDisks
  1192 0000C78F 01D6                <1> 	add	esi, edx
  1193                              <1> 	
  1194 0000C791 8A5603              <1> 	mov	dl, [esi+LD_FATType]
  1195 0000C794 20D2                <1> 	and	dl, dl
  1196 0000C796 743F                <1> 	jz	short loc_save_fat_buffer_inv_data_pop_retn 
  1197                              <1> 
  1198 0000C798 A1[227F0100]        <1> 	mov	eax, [FAT_BuffSector]
  1199 0000C79D 80FA02              <1> 	cmp	dl, 2
  1200 0000C7A0 772E                <1> 	ja	short loc_save_fat32_buff
  1201                              <1> 
  1202                              <1> loc_save_fat_12_16_buff:
  1203                              <1> 	; 01/03/2016
  1204                              <1> 	; TRDOS v1 has a FATal bug here!
  1205                              <1> 	; Correct code: mov dx, word ptr [FAT_BuffSector]+2
  1206                              <1> 	; (DX:AX in TRDOS v1 -> EAX in TRDOS v2)
  1207                              <1> 	;
  1208 0000C7A2 0FB74E1C            <1> 	movzx	ecx, word [esi+LD_BPB+FATSecs] 
  1209 0000C7A6 29C1                <1> 	sub	ecx, eax
  1210                              <1> 	; TRDOS v1 has a bug here... ('pop esi' was forgotten!)
  1211                              <1> 	;jna	short loc_save_fat_buffer_inv_data_retn ; wrong addr!
  1212 0000C7A8 762D                <1> 	jna	short loc_save_fat_buffer_inv_data_pop_retn ; correct addr.
  1213                              <1> 	; 25/07/2022
  1214                              <1> 	;jmp	short loc_save_fat_buffer_check_rs3
  1215                              <1> 
  1216                              <1> loc_save_fat_buffer_check_rs3:
  1217                              <1> 	; 25/07/2022
  1218 0000C7AA 29DB                <1> 	sub	ebx, ebx
  1219 0000C7AC B303                <1> 	mov	bl, 3
  1220                              <1> 	;cmp	ecx, 3
  1221 0000C7AE 39D9                <1> 	cmp	ecx, ebx ; 3
  1222 0000C7B0 7602                <1> 	jna	short loc_save_fat_buff_continue
  1223 0000C7B2 89D9                <1> 	mov	ecx, ebx ; mov ecx, 3
  1224                              <1> loc_save_fat_buff_continue:
  1225 0000C7B4 BB001C0900          <1> 	mov	ebx, FAT_Buffer
  1226 0000C7B9 034660              <1> 	add	eax, [esi+LD_FATBegin]
  1227 0000C7BC 51                  <1> 	push	ecx
  1228 0000C7BD E8D4550000          <1> 	call	disk_write
  1229 0000C7C2 59                  <1> 	pop	ecx
  1230 0000C7C3 7239                <1> 	jc	short loc_save_FAT_buff_write_err
  1231                              <1> 	
  1232 0000C7C5 807E0302            <1> 	cmp	byte [esi+LD_FATType], 2
  1233 0000C7C9 7613                <1> 	jna	short loc_calc_2nd_fat12_16_addr
  1234                              <1> 
  1235                              <1> loc_calc_2nd_fat32_addr:
  1236 0000C7CB 8B462A              <1> 	mov	eax, [esi+LD_BPB+FAT32_FAT_Size]
  1237 0000C7CE EB12                <1> 	jmp	short loc_calc_2nd_fat_addr
  1238                              <1> 
  1239                              <1> 	; 25/07/2022
  1240                              <1> loc_save_fat32_buff:
  1241 0000C7D0 8B4E2A              <1> 	mov	ecx, [esi+LD_BPB+FAT32_FAT_Size]
  1242 0000C7D3 29C1                <1> 	sub	ecx, eax
  1243 0000C7D5 77D3                <1> 	ja	short loc_save_fat_buffer_check_rs3
  1244                              <1> 
  1245                              <1> loc_save_fat_buffer_inv_data_pop_retn:
  1246 0000C7D7 5E                  <1> 	pop	esi ; *
  1247                              <1> loc_save_fat_buffer_inv_data_retn:
  1248                              <1> 	;mov	eax, 0Dh ; Invalid DATA
  1249                              <1> 	; 25/07/2022
  1250 0000C7D8 29C0                <1> 	sub	eax, eax
  1251 0000C7DA B00D                <1> 	mov	al, 0Dh  ; Invalid DATA
  1252 0000C7DC F9                  <1> 	stc	; cf = 1
  1253 0000C7DD C3                  <1> 	retn
  1254                              <1> 
  1255                              <1> loc_calc_2nd_fat12_16_addr:
  1256 0000C7DE 0FB7461C            <1> 	movzx	eax, word [esi+LD_BPB+FATSecs]
  1257                              <1> 
  1258                              <1> loc_calc_2nd_fat_addr:
  1259 0000C7E2 034660              <1> 	add	eax, [esi+LD_FATBegin]
  1260 0000C7E5 0305[227F0100]      <1> 	add	eax, [FAT_BuffSector]
  1261 0000C7EB BB001C0900          <1> 	mov	ebx, FAT_Buffer
  1262                              <1> 	; ecx = 1 to 3
  1263 0000C7F0 E8A1550000          <1> 	call	disk_write
  1264 0000C7F5 7207                <1> 	jc	short loc_save_FAT_buff_write_err
  1265                              <1>  	; Valid  buffer (1 = valid but do not save)
  1266 0000C7F7 C605[1E7F0100]01    <1> 	mov	byte [FAT_BuffValidData], 1
  1267                              <1> 
  1268                              <1> loc_save_FAT_buff_write_err:
  1269 0000C7FE 5E                  <1> 	pop	esi ; *
  1270 0000C7FF BB001C0900          <1> 	mov	ebx, FAT_Buffer
  1271                              <1> 	; 15/10/2016 (1Dh -> 18)
  1272                              <1> 	; 23/03/2016 (1Dh)
  1273 0000C804 B812000000          <1> 	mov	eax, 18 ; Drive not ready or write error
  1274 0000C809 C3                  <1> 	retn
  1275                              <1> 
  1276                              <1> calculate_fat_freespace:
  1277                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
  1278                              <1> 	; 23/03/2016
  1279                              <1> 	; 02/03/2016
  1280                              <1> 	; 01/03/2016
  1281                              <1> 	; 29/02/2016
  1282                              <1> 	; 22/02/2016 (TRDOS 386 = TRDOS v2.0)
  1283                              <1> 	; 30/04/2011
  1284                              <1> 	; 03/04/2010
  1285                              <1> 	; 2005
  1286                              <1> 	; INPUT ->
  1287                              <1> 	;	EAX = Cluster count to be added or subtracted
  1288                              <1> 	; 	If BH = FFh, ESI = TR-DOS Logical Drive Description Table
  1289                              <1> 	; 	If BH < FFh, BH = TR-DOS Logical Drive Number
  1290                              <1> 	; 	BL: 
  1291                              <1> 	;	0 = Calculate, 1 = Add, 2 = Subtract, 3 = Get (Not Set/Calc)
  1292                              <1> 	; OUTPUT ->
  1293                              <1> 	;	EAX = Free Space in sectors
  1294                              <1> 	;	ESI = Logical Dos Drive Description Table address
  1295                              <1> 	;	BH = Logical Dos Drive Number (same with input value of BH)
  1296                              <1> 	;	BL = Type of operation (same with input value of BL)
  1297                              <1> 	;	ECX = 0 -> valid
  1298                              <1> 	;	ECX > 0 -> error or invalid
  1299                              <1> 	;	If EAX = FFFFFFFFh, it is 're-calculation needed'
  1300                              <1> 	;			          sign due to r/w error   
  1301                              <1> 
  1302 0000C80A 66891D[C2810100]    <1> 	mov	[CFS_OPType], bx
  1303 0000C811 A3[C4810100]        <1> 	mov	[CFS_CC], eax
  1304                              <1> 	
  1305 0000C816 80FFFF              <1> 	cmp	bh, 0FFh
  1306 0000C819 740B                <1> 	je	short pass_calculate_freespace_get_drive_dt_offset
  1307                              <1> 
  1308                              <1> loc_calculate_freespace_get_drive_dt_offset:     
  1309 0000C81B 31C0                <1> 	xor	eax, eax
  1310 0000C81D 88FC                <1>         mov     ah, bh
  1311 0000C81F BE00010900          <1> 	mov	esi, Logical_DOSDisks
  1312 0000C824 01C6                <1>         add     esi, eax
  1313                              <1> 
  1314                              <1> pass_calculate_freespace_get_drive_dt_offset:
  1315 0000C826 08DB                <1> 	or	bl, bl
  1316 0000C828 7436                <1> 	jz	short loc_reset_fcc
  1317                              <1> 	
  1318                              <1> loc_get_free_sectors:
  1319 0000C82A 8B4674              <1> 	mov	eax, [esi+LD_FreeSectors]
  1320                              <1> 
  1321                              <1> 	;xor	ecx, ecx
  1322                              <1> 	;dec	ecx ; 0FFFFFFFFh
  1323                              <1> 	;cmp	eax, ecx ; 29/02/2016
  1324                              <1> 	;je	short loc_get_free_sectors_retn ; recalculation is needed!
  1325                              <1> 	
  1326                              <1> 	; 23/03/2016
  1327 0000C82D 8B4E70              <1> 	mov	ecx, [esi+LD_TotalSectors]
  1328 0000C830 39C1                <1> 	cmp	ecx, eax ; Total sectors must be greater than Free sectors !
  1329 0000C832 7707                <1> 	ja	short loc_get_free_sectors_check_optype
  1330                              <1> 	
  1331 0000C834 31C0                <1> 	xor	eax, eax
  1332 0000C836 48                  <1> 	dec	eax ; 0FFFFFFFFh  ; recalculation is needed!
  1333 0000C837 894674              <1> 	mov	[esi+LD_FreeSectors], eax ; reset (for recalculation)
  1334                              <1> 		
  1335                              <1> loc_get_free_sectors_retn:
  1336 0000C83A C3                  <1> 	retn
  1337                              <1> 	
  1338                              <1> loc_get_free_sectors_check_optype:
  1339 0000C83B 80FB03              <1> 	cmp	bl, 3
  1340 0000C83E 7203                <1> 	jb	short loc_set_fcc_1 ; 25/07/2022
  1341                              <1> 
  1342 0000C840 29C9                <1> 	sub	ecx, ecx ; 0
  1343                              <1> 
  1344 0000C842 C3                  <1> 	retn	
  1345                              <1> 
  1346                              <1> loc_set_fcc_1:
  1347 0000C843 807E0302            <1> 	cmp	byte [esi+LD_FATType], 2
  1348                              <1> 	;ja	loc_update_FAT32_fs_info_fcc
  1349                              <1> 	; 25/07/2022
  1350 0000C847 7605                <1> 	jna	short loc_set_fcc_2
  1351 0000C849 E9DD000000          <1> 	jmp	loc_update_FAT32_fs_info_fcc
  1352                              <1> 
  1353                              <1> loc_set_fcc_2:
  1354                              <1> 	;mov	eax, [esi+LD_FreeSectors]
  1355 0000C84E 0FB64E13            <1> 	movzx	ecx, byte [esi+LD_BPB+SecPerClust]
  1356 0000C852 29D2                <1> 	sub	edx, edx
  1357 0000C854 F7F1                <1> 	div	ecx
  1358                              <1> 	;or	dx, dx 
  1359                              <1> 	;	; DX -> Remain sectors < SecPerClust
  1360                              <1> 	;	; DX > 0 -> invalid free sector count
  1361                              <1> 	;jnz	short loc_reset_fcc 
  1362                              <1> 
  1363                              <1> ;pass_set_fcc_div32:
  1364 0000C856 A3[3C7F0100]        <1> 	mov	[FreeClusterCount], eax
  1365 0000C85B E986000000          <1>         jmp     loc_set_free_sectors_FAT12_FAT16
  1366                              <1> 
  1367                              <1> loc_reset_fcc:
  1368 0000C860 31C0                <1> 	xor	eax, eax
  1369 0000C862 A3[3C7F0100]        <1> 	mov	[FreeClusterCount], eax ; 0
  1370 0000C867 8B5678              <1> 	mov	edx, [esi+LD_Clusters]
  1371 0000C86A 42                  <1> 	inc	edx
  1372 0000C86B 8915[2A7F0100]      <1> 	mov	[LastCluster], edx
  1373                              <1> 
  1374 0000C871 807E0302            <1> 	cmp	byte [esi+LD_FATType], 2
  1375 0000C875 7645                <1> 	jna	short loc_count_free_fat_clusters_0  
  1376                              <1> 
  1377 0000C877 48                  <1> 	dec	eax ; FFFFFFFFh
  1378 0000C878 A3[CC810100]        <1> 	mov	[CFS_FAT32FC], eax
  1379                              <1> 
  1380                              <1> 	; 29/02/2016
  1381 0000C87D 89463A              <1> 	mov	[esi+LD_BPB+BPB_Reserved], eax ; reset
  1382 0000C880 89463E              <1> 	mov	[esi+LD_BPB+BPB_Reserved+4], eax ; reset
  1383                              <1> 	
  1384                              <1> 	;mov 	eax, 2
  1385                              <1> 	; 25/07/2022
  1386 0000C883 40                  <1> 	inc	eax ; eax = 0
  1387 0000C884 B002                <1> 	mov	al, 2
  1388                              <1> 
  1389                              <1> loc_count_fc_next_cluster_0:
  1390 0000C886 50                  <1> 	push	eax
  1391 0000C887 E87BF9FFFF          <1> 	call	get_next_cluster
  1392 0000C88C 7310                <1> 	jnc	short loc_check_fat32_ff_cluster
  1393 0000C88E 09C0                <1> 	or	eax, eax
  1394 0000C890 741E                <1> 	jz	short pass_inc_cfs_fcc_0
  1395                              <1> 
  1396                              <1> loc_put_fcc_unknown_sign:
  1397 0000C892 58                  <1> 	pop	eax
  1398                              <1> 	; "Free count is Unknown" sign
  1399                              <1> 	;mov	dword [FreeClusterCount], 0FFFFFFFFh
  1400                              <1> 
  1401                              <1> 	; 29/02/2016
  1402                              <1> 	; Save Free Cluster Count value in FAT32 'BPB_Reserved' area
  1403                              <1> 	;mov	[esi+LD_BPB+BPB_Reserved], 0FFFFFFFFh ; unknown!
  1404 0000C893 8B15[CC810100]      <1> 	mov	edx, [CFS_FAT32FC] ; First Free Cluster
  1405                              <1> 	; Save First Free Cluster value in FAT32 'BPB_Reserved+4' area
  1406 0000C899 89563E              <1> 	mov	[esi+LD_BPB+BPB_Reserved+4], edx
  1407                              <1> 	
  1408 0000C89C EB7D                <1>         jmp     loc_put_fcc_invalid_sign
  1409                              <1> 
  1410                              <1> loc_check_fat32_ff_cluster:
  1411 0000C89E 09C0                <1> 	or	eax, eax
  1412 0000C8A0 750E                <1> 	jnz	short pass_inc_cfs_fcc_0
  1413 0000C8A2 58                  <1> 	pop	eax
  1414 0000C8A3 A3[CC810100]        <1> 	mov	[CFS_FAT32FC], eax
  1415                              <1> 	;mov	dword [FreeClusterCount], 1
  1416 0000C8A8 FF05[3C7F0100]      <1> 	inc	dword [FreeClusterCount]
  1417 0000C8AE EB27                <1> 	jmp	short pass_inc_cfs_fcc_1
  1418                              <1> 
  1419                              <1> pass_inc_cfs_fcc_0:
  1420 0000C8B0 58                  <1> 	pop	eax
  1421                              <1> 
  1422                              <1> pass_inc_cfs_fcc_0c:
  1423 0000C8B1 40                  <1> 	inc	eax ; add eax, 1
  1424 0000C8B2 3B05[2A7F0100]      <1> 	cmp	eax, [LastCluster]
  1425 0000C8B8 76CC                <1> 	jna 	short loc_count_fc_next_cluster_0
  1426 0000C8BA EB6F                <1> 	jmp	short loc_update_FAT32_fs_info_fcc
  1427                              <1> 
  1428                              <1> loc_count_free_fat_clusters_0:
  1429                              <1> 	;mov	eax, 2
  1430 0000C8BC B002                <1> 	mov	al, 2
  1431                              <1> 
  1432                              <1> loc_count_fc_next_cluster:
  1433 0000C8BE 50                  <1> 	push	eax
  1434 0000C8BF E843F9FFFF          <1> 	call	get_next_cluster
  1435 0000C8C4 720C                <1> 	jc	short loc_count_fcc_stc
  1436                              <1> 
  1437                              <1> loc_count_free_clusters_1:
  1438 0000C8C6 21C0                <1> 	and	eax, eax
  1439 0000C8C8 750C                <1> 	jnz	short pass_inc_cfs_fcc
  1440                              <1> 
  1441 0000C8CA FF05[3C7F0100]      <1> 	inc	dword [FreeClusterCount]
  1442 0000C8D0 EB04                <1> 	jmp	short pass_inc_cfs_fcc
  1443                              <1> 
  1444                              <1> loc_count_fcc_stc:
  1445 0000C8D2 09C0                <1> 	or	eax, eax
  1446 0000C8D4 75BC                <1> 	jnz	short loc_put_fcc_unknown_sign ; 29/02/2016
  1447                              <1> 
  1448                              <1> pass_inc_cfs_fcc:
  1449 0000C8D6 58                  <1> 	pop	eax
  1450                              <1> 
  1451                              <1> pass_inc_cfs_fcc_1:
  1452 0000C8D7 40                  <1> 	inc	eax ; add eax, 1
  1453 0000C8D8 3B05[2A7F0100]      <1> 	cmp	eax, [LastCluster]
  1454 0000C8DE 76DE                <1> 	jna	short loc_count_fc_next_cluster
  1455                              <1> 
  1456                              <1> loc_set_free_sectors:
  1457 0000C8E0 807E0302            <1> 	cmp	byte [esi+LD_FATType], 2
  1458 0000C8E4 7745                <1> 	ja	short loc_update_FAT32_fs_info_fcc
  1459                              <1> 
  1460                              <1> loc_set_free_sectors_FAT12_FAT16:
  1461 0000C8E6 803D[C2810100]00    <1> 	cmp	byte [CFS_OPType], 0
  1462 0000C8ED 761C                <1> 	jna	short pass_FAT_add_sub_fcc
  1463 0000C8EF A1[C4810100]        <1> 	mov	eax, [CFS_CC]
  1464 0000C8F4 803D[C2810100]01    <1> 	cmp	byte [CFS_OPType], 1
  1465 0000C8FB 7708                <1> 	ja	short pass_FAT_add_fcc
  1466 0000C8FD 0105[3C7F0100]      <1> 	add 	[FreeClusterCount], eax
  1467 0000C903 EB06                <1> 	jmp	short pass_FAT_add_sub_fcc
  1468                              <1> 
  1469                              <1> pass_FAT_add_fcc:
  1470 0000C905 2905[3C7F0100]      <1> 	sub	[FreeClusterCount], eax
  1471                              <1> 
  1472                              <1> pass_FAT_add_sub_fcc:
  1473 0000C90B 0FB64613            <1> 	movzx	eax, byte [esi+LD_BPB+SecPerClust]
  1474 0000C90F 8B15[3C7F0100]      <1> 	mov	edx, [FreeClusterCount]
  1475 0000C915 F7E2                <1> 	mul	edx
  1476                              <1> 
  1477 0000C917 31C9                <1> 	xor	ecx, ecx 
  1478 0000C919 EB05                <1> 	jmp	short loc_cfs_retn_params
  1479                              <1> 
  1480                              <1> loc_put_fcc_invalid_sign:
  1481 0000C91B 29C0                <1>        	sub	eax, eax ; 0
  1482 0000C91D 48                  <1> 	dec	eax ; FFFFFFFFh
  1483                              <1> loc_fat32_ffc_recalc_needed:
  1484 0000C91E 89C1                <1> 	mov	ecx, eax
  1485                              <1> 
  1486                              <1> loc_cfs_retn_params:
  1487 0000C920 894674              <1> 	mov 	[esi+LD_FreeSectors], eax
  1488 0000C923 0FB71D[C2810100]    <1> 	movzx	ebx, word [CFS_OPType]
  1489 0000C92A C3                  <1> 	retn
  1490                              <1> 
  1491                              <1> loc_update_FAT32_fs_info_fcc:
  1492                              <1> loc_check_fcc_FSINFO_op:
  1493                              <1> 	; 29/02/2016
  1494                              <1> 	; EAX = Free cluster count (before this update) ; value from disk
  1495                              <1> 	; EDX = First Free Cluster (before this update) ; value from disk
  1496 0000C92B 803D[C2810100]01    <1> 	cmp	byte [CFS_OPType], 1
  1497 0000C932 7221                <1> 	jb	short loc_cfs_FAT32_get_rcalc_parms ; 0 = recalculated
  1498 0000C934 7406                <1> 	je	short loc_check_fcc_FSINFO_op1 ; 1 = add
  1499                              <1> loc_check_fcc_FSINFO_op2: ; subtract
  1500 0000C936 F71D[C4810100]      <1> 	neg	dword [CFS_CC] ; prepare to subtract ; 2 = sub (add negative)
  1501                              <1> loc_check_fcc_FSINFO_op1:
  1502                              <1> 	; 01/03/2016
  1503 0000C93C 31D2                <1> 	xor	edx, edx ; 0
  1504 0000C93E 4A                  <1> 	dec	edx ; 0FFFFFFFFh
  1505 0000C93F 8B463A              <1> 	mov	eax, [esi+LD_BPB+BPB_Reserved]
  1506 0000C942 39D0                <1> 	cmp	eax, edx
  1507 0000C944 73D5                <1> 	jnb	short loc_put_fcc_invalid_sign
  1508 0000C946 0305[C4810100]      <1>         add     eax, [CFS_CC] ; free cluster count on disk + current count
  1509 0000C94C 72CD                <1> 	jc	short loc_put_fcc_invalid_sign
  1510                              <1> 	
  1511 0000C94E A3[3C7F0100]        <1> 	mov	[FreeClusterCount], eax
  1512 0000C953 EB0E                <1> 	jmp	short loc_cfs_write_FSINFO_sector
  1513                              <1> 
  1514                              <1> loc_cfs_FAT32_get_rcalc_parms:
  1515 0000C955 8B15[CC810100]      <1> 	mov	edx, [CFS_FAT32FC]
  1516 0000C95B A1[3C7F0100]        <1> 	mov	eax, [FreeClusterCount]
  1517 0000C960 89563E              <1> 	mov	[esi+LD_BPB+BPB_Reserved+4], edx ; First Free Cluster
  1518                              <1> loc_cfs_write_FSINFO_sector:
  1519 0000C963 89463A              <1> 	mov	[esi+LD_BPB+BPB_Reserved], eax ; Free cluster count
  1520                              <1> 	; 01/03/2016
  1521 0000C966 E8AA000000          <1> 	call	set_fat32_fsinfo_sector_parms
  1522 0000C96B 72AE                <1>         jc      short loc_put_fcc_invalid_sign
  1523                              <1> 
  1524                              <1> loc_set_FAT32_free_sectors:
  1525                              <1> 	; 29/02/2016
  1526                              <1> 	;mov	eax, [FreeClusterCount]
  1527                              <1> 	;mov	ecx, eax
  1528                              <1> 	;cmp	eax, 0FFFFFFFFh ; Invalid !
  1529                              <1> 	;je	short loc_cfs_retn_params
  1530                              <1> 	;
  1531 0000C96D 8B0D[3C7F0100]      <1> 	mov	ecx, [FreeClusterCount]
  1532 0000C973 0FB64613            <1> 	movzx	eax, byte [esi+LD_BPB+SecPerClust]
  1533 0000C977 F7E1                <1> 	mul	ecx
  1534                              <1> 	; 29/02/2016
  1535 0000C979 31C9                <1> 	xor	ecx, ecx ; 0
  1536 0000C97B 09D2                <1> 	or	edx, edx ; 0 ?
  1537 0000C97D 759C                <1>         jnz	short loc_put_fcc_invalid_sign ; 25/07/2022
  1538 0000C97F 394670              <1> 	cmp	[esi+LD_TotalSectors], eax ; Volume size in sectors
  1539 0000C982 7697                <1>         jna     short loc_put_fcc_invalid_sign
  1540                              <1> 	;
  1541                              <1> loc_set_FAT32_free_sectors_ok:
  1542 0000C984 31D2                <1> 	xor	edx, edx ; 0
  1543 0000C986 EB98                <1>         jmp     short loc_cfs_retn_params 
  1544                              <1> 	;
  1545                              <1> 
  1546                              <1> get_last_cluster:
  1547                              <1> 	; 22/10/2016
  1548                              <1> 	; 27/02/2016 (TRDOS 386 = TRDOS v2.0)
  1549                              <1> 	; 12/06/2010 (DRV_FAT.ASM, 'proc_get_last_custer')
  1550                              <1> 	; 06/06/2010
  1551                              <1> 	; INPUT ->
  1552                              <1> 	;	EAX = First Cluster Number
  1553                              <1> 	; 	ESI = Logical Dos Drive Parameters Table
  1554                              <1> 	; OUTPUT ->
  1555                              <1> 	;	cf = 0 -> No Error, EAX is valid
  1556                              <1> 	;	cf = 1 -> EAX > 0 -> Error
  1557                              <1> 	;	EAX = Last Cluster Number
  1558                              <1> 	;       ECX = Previous Cluster -just before the last cluster-
  1559                              <1> 	;       ; 22/10/2016
  1560                              <1> 	;	[glc_index] = cluster index number of the last cluster	
  1561                              <1> 	;
  1562                              <1> 	; (Modified registers: EAX, ECX, EBX, EDX)
  1563                              <1> 
  1564 0000C988 89C1                <1> 	mov	ecx, eax
  1565                              <1> 
  1566 0000C98A C705[D4810100]FFFF- <1> 	mov	dword [glc_index], 0FFFFFFFFh ; 22/10/2016	
  1566 0000C992 FFFF                <1>
  1567                              <1> 
  1568                              <1> loc_glc_get_next_cluster_1:
  1569 0000C994 890D[D0810100]      <1> 	mov	[glc_prevcluster], ecx
  1570                              <1>  	; 22/10/2016
  1571 0000C99A FF05[D4810100]      <1> 	inc	dword [glc_index]
  1572                              <1> 
  1573                              <1> loc_glc_get_next_cluster_2:
  1574 0000C9A0 E862F8FFFF          <1> 	call	get_next_cluster
  1575                              <1> 	; ecx = current/previous cluster 
  1576                              <1> 	; eax = next/last cluster
  1577 0000C9A5 73ED                <1> 	jnc	short loc_glc_get_next_cluster_1
  1578                              <1> 
  1579 0000C9A7 09C0                <1> 	or	eax, eax
  1580 0000C9A9 7509                <1> 	jnz	short loc_glc_stc_retn
  1581                              <1> 
  1582                              <1> 	; ecx = previous cluster
  1583 0000C9AB 89C8                <1>         mov	eax, ecx
  1584                              <1> 
  1585                              <1> 	; previous cluster becomes last cluster (ecx -> eax)
  1586                              <1> 	; previous of previous cluster becomes previous cluster (ecx)
  1587                              <1> 
  1588                              <1> loc_glc_prev_cluster_retn:
  1589 0000C9AD 8B0D[D0810100]      <1> 	mov	ecx, [glc_prevcluster] 
  1590 0000C9B3 C3                  <1> 	retn
  1591                              <1> 
  1592                              <1> loc_glc_stc_retn:
  1593 0000C9B4 F5                  <1> 	cmc	;stc
  1594 0000C9B5 EBF6                <1>         jmp	short loc_glc_prev_cluster_retn
  1595                              <1> 
  1596                              <1> truncate_cluster_chain:
  1597                              <1> 	; 01/03/2016
  1598                              <1> 	; 28/02/2016 (TRDOS 386 = TRDOS v2.0)
  1599                              <1> 	; 22/01/2011 (DRV_FAT.ASM, 'proc_truncate_cluster_chain')
  1600                              <1> 	; 11/09/2010
  1601                              <1> 	; INPUT ->
  1602                              <1> 	;	ESI = Logical dos drive description table address
  1603                              <1> 	;	EAX = First cluster to be truncated/unlinked 
  1604                              <1> 	; OUTPUT ->
  1605                              <1> 	;	ESI = Logical dos drive description table address
  1606                              <1> 	; 	ECX = Count of truncated/removed clusters
  1607                              <1> 	; 	CF = 0 -> EAX = Free sectors
  1608                              <1> 	; 	CF = 1 -> Error code in EAX (AL)
  1609                              <1> 
  1610                              <1> 	; NOTE: This procedure does not update lm date&time ! 
  1611                              <1> 
  1612                              <1> loc_truncate_cc:	
  1613 0000C9B7 31C9                <1> 	xor	ecx, ecx ; mov ecx, 0
  1614                              <1> 	;mov	byte [FAT_BuffValidData], 0
  1615 0000C9B9 890D[267F0100]      <1> 	mov	[FAT_ClusterCounter], ecx ; 0 ; reset
  1616                              <1> 
  1617                              <1> loc_tcc_unlink_clusters:
  1618 0000C9BF E832FBFFFF          <1> 	call	update_cluster
  1619                              <1> 	; EAX = Next Cluster
  1620                              <1> 	; ECX = Cluster Value
  1621                              <1> 	; Note:
  1622                              <1> 	; Returns count of unlinked clusters in
  1623                              <1> 	; dword ptr FAT_ClusterCounter
  1624 0000C9C4 73F9                <1> 	jnc	short loc_tcc_unlink_clusters
  1625                              <1> 
  1626                              <1> pass_tcc_unlink_clusters:
  1627 0000C9C6 A2[DB810100]        <1> 	mov	byte [TCC_FATErr], al
  1628 0000C9CB 803D[1E7F0100]02    <1> 	cmp	byte [FAT_BuffValidData], 2
  1629 0000C9D2 750E                <1> 	jne	short loc_tcc_calculate_FAT_freespace
  1630 0000C9D4 E8A0FDFFFF          <1> 	call	save_fat_buffer
  1631 0000C9D9 7307                <1> 	jnc	short loc_tcc_calculate_FAT_freespace
  1632 0000C9DB A2[DB810100]        <1> 	mov	byte [TCC_FATErr], al ; Error
  1633                              <1> 	;mov	byte [FAT_BuffValidData], 0
  1634                              <1> 
  1635                              <1> 	; 01/03/2016
  1636 0000C9E0 EB12                <1> 	jmp	short loc_tcc_recalculate_FAT_freespace
  1637                              <1> 
  1638                              <1> loc_tcc_calculate_FAT_freespace:
  1639 0000C9E2 A1[267F0100]        <1> 	mov	eax, [FAT_ClusterCounter] ; signed (+-) number
  1640 0000C9E7 66BB01FF            <1> 	mov	bx, 0FF01h ; BH = FFh -> ESI = Dos drv desc. table
  1641                              <1> 			   ; BL = 1 -> add cluster(s)
  1642 0000C9EB E81AFEFFFF          <1> 	call	calculate_fat_freespace
  1643 0000C9F0 21C9                <1> 	and	ecx, ecx ; cx = 0 -> valid free sector count
  1644 0000C9F2 7409                <1> 	jz	short pass_truncate_cc_recalc_FAT_freespace
  1645                              <1> 
  1646                              <1> loc_tcc_recalculate_FAT_freespace:
  1647 0000C9F4 66BB00FF            <1> 	mov	bx, 0FF00h ; recalculate !
  1648 0000C9F8 E80DFEFFFF          <1> 	call	calculate_fat_freespace
  1649                              <1>               
  1650                              <1> loc_tcc_calculate_FAT_freespace_err:
  1651                              <1> pass_truncate_cc_recalc_FAT_freespace:
  1652 0000C9FD 8B0D[267F0100]      <1> 	mov	ecx, [FAT_ClusterCounter]
  1653                              <1> 
  1654 0000CA03 803D[DB810100]00    <1> 	cmp	byte [TCC_FATErr], 0
  1655 0000CA0A 7608                <1> 	jna	short loc_tcc_unlink_clusters_retn
  1656                              <1> 
  1657                              <1> loc_tcc_unlink_clusters_error:
  1658 0000CA0C 0FB605[DB810100]    <1> 	movzx	eax, byte [TCC_FATErr]
  1659 0000CA13 F9                  <1> 	stc
  1660                              <1> loc_tcc_unlink_clusters_retn:
  1661 0000CA14 C3                  <1> 	retn
  1662                              <1> 
  1663                              <1> set_fat32_fsinfo_sector_parms:
  1664                              <1> 	; 15/10/2016
  1665                              <1> 	; 23/03/2016
  1666                              <1> 	; 29/02/2016 (TRDOS 386 = TRDOS v2.0)
  1667                              <1> 	; INPUT ->
  1668                              <1> 	;	ESI = Logical dos drive description table address
  1669                              <1> 	;	[esi+LD_BPB+BPB_Reserved] = Free Cluster Count
  1670                              <1> 	;	[esi+LD_BPB+BPB_Reserved+4] = First Free Cluster 
  1671                              <1> 	; OUTPUT ->
  1672                              <1> 	;	ESI = Logical dos drive description table address
  1673                              <1> 	; 	CF = 0 -> OK..
  1674                              <1> 	; 	CF = 1 -> Error code in EAX (AL)
  1675                              <1> 	;
  1676                              <1> 	; (Modified registers: EAX, EBX, ECX, EDX)
  1677                              <1> 
  1678 0000CA15 E824000000          <1> 	call	get_fat32_fsinfo_sector_parms
  1679 0000CA1A 7221                <1> 	jc	short update_fat32_fsinfo_sector_retn
  1680                              <1> 
  1681 0000CA1C 8B463A              <1> 	mov	eax, [esi+LD_BPB+BPB_Reserved] ; Free Cluster Count
  1682 0000CA1F 8B563E              <1> 	mov	edx, [esi+LD_BPB+BPB_Reserved+4] ; First free Cluster	
  1683                              <1> 
  1684                              <1>         ;mov	ebx, DOSBootSectorBuff
  1685 0000CA22 8983E8010000        <1> 	mov	[ebx+488], eax
  1686 0000CA28 8993EC010000        <1> 	mov	[ebx+492], edx	
  1687                              <1> 
  1688 0000CA2E A1[C8810100]        <1> 	mov	eax, [CFS_FAT32FSINFOSEC]
  1689 0000CA33 B901000000          <1> 	mov	ecx, 1
  1690 0000CA38 E859530000          <1> 	call	disk_write
  1691                              <1> 	;jnc	short update_fat32_fsinfo_sector_retn
  1692                              <1> 
  1693                              <1> 	; 15/10/2016 (1Dh -> 18)
  1694                              <1> 	; 23/03/2016 (1Dh)
  1695                              <1> 	;mov	eax, 18 ; Drive not ready or write error
  1696                              <1> 
  1697                              <1> update_fat32_fsinfo_sector_retn:
  1698 0000CA3D C3                  <1> 	retn
  1699                              <1> 
  1700                              <1> get_fat32_fsinfo_sector_parms:
  1701                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
  1702                              <1> 	; 15/10/2016
  1703                              <1> 	; 23/03/2016
  1704                              <1> 	; 01/03/2016
  1705                              <1> 	; 29/02/2016 (TRDOS 386 = TRDOS v2.0)
  1706                              <1> 	; INPUT ->
  1707                              <1> 	;	ESI = Logical dos drive description table address
  1708                              <1> 	; OUTPUT ->
  1709                              <1> 	;	ESI = Logical dos drive description table address
  1710                              <1> 	;	EBX = FSINFO sector buffer address (DOSBootSectorBuff)	
  1711                              <1> 	;	CF = 0 -> OK..
  1712                              <1> 	;	   EAX = FsInfo sector address
  1713                              <1> 	;	   ECX = Free cluster count
  1714                              <1> 	;	   EDX = First free cluster 	
  1715                              <1> 	;	CF = 1 -> Error code in AL (EAX)
  1716                              <1> 	;	   EBX = 0
  1717                              <1> 	;	
  1718                              <1> 	;	[CFS_FAT32FSINFOSEC] = FAT32 FSINFO sector address
  1719                              <1>         ;
  1720                              <1> 	; (Modified registers: EAX, EBX, ECX, EDX)
  1721                              <1> 
  1722 0000CA3E 0FB74636            <1> 	movzx	eax, word [esi+LD_BPB+FAT32_FSInfoSec]
  1723 0000CA42 03466C              <1> 	add	eax, [esi+LD_StartSector]
  1724 0000CA45 A3[C8810100]        <1> 	mov	[CFS_FAT32FSINFOSEC], eax
  1725                              <1> 	
  1726 0000CA4A BB[1A7D0100]        <1>         mov     ebx, DOSBootSectorBuff
  1727                              <1> 	;mov	ecx, 1
  1728                              <1> 	; 25/07/2022
  1729 0000CA4F 29C9                <1> 	sub	ecx, ecx
  1730 0000CA51 FEC1                <1> 	inc	cl
  1731                              <1> 	; ecx = 1
  1732 0000CA53 E84D530000          <1> 	call	disk_read
  1733 0000CA58 722F                <1> 	jc	short loc_read_FAT32_fsinfo_sec_err
  1734                              <1> 
  1735 0000CA5A BB[1A7D0100]        <1> 	mov	ebx, DOSBootSectorBuff
  1736                              <1> 
  1737 0000CA5F 813B52526141        <1> 	cmp	dword [ebx], 41615252h
  1738 0000CA65 751E                <1> 	jne	short loc_read_FAT32_fsinfo_sec_stc
  1739                              <1> 
  1740 0000CA67 81BBE4010000727241- <1> 	cmp	dword [ebx+484], 61417272h
  1740 0000CA70 61                  <1>
  1741 0000CA71 7512                <1> 	jne	short loc_read_FAT32_fsinfo_sec_stc
  1742                              <1> 
  1743 0000CA73 A1[C8810100]        <1> 	mov	eax, [CFS_FAT32FSINFOSEC]
  1744 0000CA78 8B8BE8010000        <1> 	mov	ecx, [ebx+488] ; free cluster count
  1745 0000CA7E 8B93EC010000        <1> 	mov	edx, [ebx+492] ; first (next) free cluster	
  1746                              <1> 
  1747 0000CA84 C3                  <1> 	retn
  1748                              <1> 
  1749                              <1> loc_read_FAT32_fsinfo_sec_stc: 
  1750                              <1> 	; 15/10/2016 (0Bh -> 28)
  1751                              <1> 	;mov	eax, 28 ; Invalid format!
  1752                              <1> 	; 25/07/2022
  1753 0000CA85 B31C                <1> 	mov	bl, 28
  1754 0000CA87 EB02                <1> 	jmp	short loc_read_FAT32_fsinfo_sec_stc_retn
  1755                              <1> 
  1756                              <1> loc_read_FAT32_fsinfo_sec_err:
  1757                              <1> 	; 15/10/2016 (15h -> 17)
  1758                              <1> 	; 23/03/2016 (15h)
  1759                              <1> 	;mov	eax, 17 ; Drive not ready or read error
  1760                              <1> 	; 25/07/2022
  1761 0000CA89 B311                <1> 	mov	bl, 17
  1762                              <1> loc_read_FAT32_fsinfo_sec_stc_retn:
  1763                              <1> 	; 25/07/2022
  1764 0000CA8B 29C0                <1> 	sub	eax, eax
  1765 0000CA8D 88D8                <1> 	mov	al, bl ; error code
  1766                              <1> 	; eax = error code
  1767 0000CA8F 29DB                <1> 	sub	ebx, ebx ; 0
  1768 0000CA91 F9                  <1> 	stc
  1769 0000CA92 C3                  <1> 	retn
  1770                              <1> 
  1771                              <1> add_new_cluster:
  1772                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
  1773                              <1> 	; 15/10/2016
  1774                              <1> 	; 16/05/2016
  1775                              <1> 	; 18/03/2016, 24/03/2016
  1776                              <1> 	; 11/03/2016 (TRDOS 386 = TRDOS v2.0)
  1777                              <1> 	; 30/07/2011 (DRV_FAT.ASM)
  1778                              <1> 	; 11/09/2010
  1779                              <1> 	; INPUT ->
  1780                              <1> 	;	ESI = Logical dos drv desc. table address
  1781                              <1> 	;	EAX = Last cluster
  1782                              <1> 	; OUTPUT ->
  1783                              <1> 	;	ESI = Logical dos drv desc. table address
  1784                              <1> 	;	EAX = New Last cluster (next cluster)
  1785                              <1> 	;	cf = 1 -> error code in EAX (AL)
  1786                              <1> 	;	cf = 1 -> EBX = sectors per cluster
  1787                              <1> 	;	ECX = Free sectors
  1788                              <1> 	;;;	25/07/2022
  1789                              <1> 	;	(EBX = sectors per cluster -not used-)
  1790                              <1> 	;	EDX = 0 (if cf = 0)
  1791                              <1> 	; NOTE:
  1792                              <1> 	; This procedure does not update lm date&time !
  1793                              <1> 	;
  1794                              <1> 	; (Modified registers: EAX, EBX, ECX, EDX, EDI)
  1795                              <1> 
  1796 0000CA93 A3[F8820100]        <1> 	mov	[FAT_anc_LCluster], eax
  1797                              <1> 	
  1798 0000CA98 E88CF9FFFF          <1> 	call	get_first_free_cluster
  1799 0000CA9D 720A                <1> 	jc	short loc_add_new_cluster_retn
  1800                              <1> 	; EAX >= 2 and EAX < FFFFFFFFh is valid
  1801                              <1> 
  1802 0000CA9F 89C2                <1> 	mov	edx, eax
  1803                              <1> 
  1804 0000CAA1 42                  <1> 	inc	edx
  1805                              <1> 	;jnz	short loc_add_new_cluster_check_ffc_eax
  1806 0000CAA2 7510                <1> 	jnz	short loc_add_new_cluster_save_fcc
  1807                              <1> 
  1808                              <1> loc_add_new_cluster_no_disk_space_retn:
  1809                              <1> 	;mov	eax, 27h ; MSDOS err => insufficient disk space
  1810                              <1> 	; 25/07/2022
  1811 0000CAA4 31C0                <1> 	xor	eax, eax
  1812 0000CAA6 B027                <1> 	mov	al, 27h
  1813                              <1> loc_add_new_cluster_stc_retn:
  1814 0000CAA8 F9                  <1> 	stc
  1815                              <1> loc_add_new_cluster_retn:
  1816                              <1> 	; 25/07/2022
  1817                              <1> 	;movzx	ebx, byte [esi+LD_BPB+SecPerClust]
  1818 0000CAA9 8B4E74              <1> 	mov	ecx, [esi+LD_FreeSectors]
  1819                              <1> 	;xor	edx, edx
  1820                              <1> 	;stc
  1821 0000CAAC C3                  <1> 	retn
  1822                              <1> 
  1823                              <1> loc_anc_invalid_format_stc_retn:
  1824 0000CAAD F9                  <1> 	stc
  1825                              <1> loc_add_new_cluster_invalid_format_retn:
  1826                              <1> 	; 15/10/2016 (0Bh -> 28)
  1827                              <1> 	;mov	eax, 28 ; Invalid format
  1828                              <1> 	;jmp	short loc_add_new_cluster_retn 
  1829                              <1> 	; 25/07/2022
  1830 0000CAAE 29C0                <1> 	sub	eax, eax
  1831 0000CAB0 B01C                <1> 	mov	al, 28
  1832 0000CAB2 EBF4                <1> 	jmp	short loc_add_new_cluster_stc_retn
  1833                              <1> 
  1834                              <1> ;loc_add_new_cluster_check_ffc_eax:
  1835                              <1> ;	cmp	eax, 2
  1836                              <1> ;	jb	short loc_add_new_cluster_invalid_format_retn
  1837                              <1> 
  1838                              <1> loc_add_new_cluster_save_fcc:  
  1839 0000CAB4 A3[FC820100]        <1> 	mov	[FAT_anc_FFCluster], eax
  1840                              <1> 
  1841 0000CAB9 83E802              <1> 	sub	eax, 2
  1842 0000CABC 0FB65E13            <1> 	movzx   ebx, byte [esi+LD_BPB+SecPerClust]
  1843 0000CAC0 F7E3                <1> 	mul	ebx
  1844 0000CAC2 09D2                <1> 	or	edx, edx
  1845 0000CAC4 75E7                <1> 	jnz	short loc_anc_invalid_format_stc_retn
  1846                              <1> 
  1847                              <1> loc_add_new_cluster_allocate_cluster:
  1848                              <1> 	; 18/03/2016
  1849 0000CAC6 92                  <1> 	xchg	edx, eax ; eax = 0
  1850                              <1> 	; 16/05/2016
  1851                              <1> 	;cmp	[ClusterBuffer_Valid], al ; 0
  1852                              <1> 	;jna	short loc_anc_clear_cluster_buffer
  1853                              <1> 	;; 'copy' command, 
  1854                              <1> 	;; writing destination file clust after reading source file clust
  1855                              <1> 	;mov	[ClusterBuffer_Valid], al ; 0 ; reset
  1856                              <1> 	;jmp	short loc_add_new_cluster_write_nc_to_disk
  1857                              <1> 
  1858                              <1> loc_anc_clear_cluster_buffer:
  1859                              <1> 	; 11/03/2016
  1860                              <1> 	; Clear buffer
  1861 0000CAC7 BF00000700          <1> 	mov	edi, Cluster_Buffer ; 70000h (for current TRDOS 386 version)
  1862 0000CACC 89D9                <1> 	mov	ecx, ebx ; sector count
  1863 0000CACE C1E107              <1> 	shl	ecx, 7 ; 1 sector = 512 bytes -> 128 double words
  1864                              <1> 	;xor	eax, eax ; 0
  1865 0000CAD1 F3AB                <1> 	rep	stosd
  1866                              <1> 
  1867                              <1> loc_add_new_cluster_write_nc_to_disk:
  1868                              <1> 	; 11/03/2016
  1869                              <1> 	;xchg	eax, edx ; edx = 0, eax = sector offset
  1870 0000CAD3 89D0                <1> 	mov	eax, edx
  1871 0000CAD5 034668              <1>         add     eax, [esi+LD_DATABegin]
  1872 0000CAD8 72D4                <1> 	jc	short loc_add_new_cluster_invalid_format_retn 
  1873                              <1> 		
  1874 0000CADA 89D9                <1> 	mov	ecx, ebx ; ECX = sectors per cluster (<256)
  1875 0000CADC BB00000700          <1> 	mov	ebx, Cluster_Buffer
  1876 0000CAE1 E8B0520000          <1> 	call	disk_write
  1877 0000CAE6 7306                <1> 	jnc	short loc_add_new_cluster_update_fat_nlc
  1878                              <1> 	
  1879                              <1> 	; 15/10/2016 (1Dh -> 18)
  1880                              <1> 	;mov	eax, 18 ; Write Error
  1881                              <1> 	; 25/07/2022
  1882 0000CAE8 31C0                <1> 	xor	eax, eax
  1883 0000CAEA B012                <1> 	mov	al, 18
  1884 0000CAEC EBBA                <1> 	jmp	short loc_add_new_cluster_stc_retn
  1885                              <1> 
  1886                              <1> loc_add_new_cluster_update_fat_nlc:
  1887 0000CAEE A1[FC820100]        <1> 	mov	eax, [FAT_anc_FFCluster]
  1888 0000CAF3 31C9                <1> 	xor	ecx, ecx
  1889 0000CAF5 890D[267F0100]      <1> 	mov	[FAT_ClusterCounter], ecx ; 0 ; reset
  1890 0000CAFB 49                  <1> 	dec	ecx ; 0FFFFFFFFh
  1891 0000CAFC E8F5F9FFFF          <1> 	call	update_cluster
  1892 0000CB01 7304                <1> 	jnc	short loc_add_new_cluster_update_fat_plc
  1893 0000CB03 09C0                <1> 	or	eax, eax ; EAX = 0 -> cluster value is 0 or eocc
  1894 0000CB05 75A1                <1> 	jnz	short loc_add_new_cluster_stc_retn
  1895                              <1> 
  1896                              <1> loc_add_new_cluster_update_fat_plc:
  1897 0000CB07 A1[F8820100]        <1> 	mov	eax, [FAT_anc_LCluster]
  1898 0000CB0C 8B0D[FC820100]      <1> 	mov	ecx, [FAT_anc_FFCluster]
  1899 0000CB12 E8DFF9FFFF          <1> 	call	update_cluster
  1900 0000CB17 7314                <1> 	jnc	short loc_add_new_cluster_save_fat_buffer
  1901 0000CB19 09C0                <1> 	or	eax, eax ; EAX = 0 -> cluster value is 0 or eocc
  1902 0000CB1B 7410                <1> 	jz	short loc_add_new_cluster_save_fat_buffer
  1903                              <1> 
  1904                              <1> loc_anc_save_fat_buffer_err_retn:
  1905                              <1> 	;cmp	byte [FAT_ClusterCounter], 1
  1906                              <1> 	;jb	short loc_add_new_cluster_retn
  1907                              <1> 
  1908 0000CB1D 66BB00FF            <1> 	mov	bx, 0FF00h ; recalculate free space (BL = 0)
  1909                              <1> 			   ; (BH = FFh -> Use ESI as Drv Param. Tbl.)
  1910 0000CB21 50                  <1> 	push	eax
  1911 0000CB22 E8E3FCFFFF          <1> 	call	calculate_fat_freespace
  1912 0000CB27 58                  <1> 	pop	eax
  1913 0000CB28 E97BFFFFFF          <1>         jmp     loc_add_new_cluster_stc_retn
  1914                              <1> 
  1915                              <1> loc_add_new_cluster_save_fat_buffer:
  1916                              <1> 	;cmp	byte [FAT_BuffValidData], 2
  1917                              <1> 	;jne	short loc_add_new_cluster_calc_FAT_freespace 
  1918                              <1> 	;Byte [FAT_BuffValidData] = 2 
  1919 0000CB2D E847FCFFFF          <1> 	call	save_fat_buffer
  1920 0000CB32 72E9                <1> 	jc	short loc_anc_save_fat_buffer_err_retn
  1921                              <1> 
  1922                              <1> loc_add_new_cluster_calc_FAT_freespace:
  1923                              <1> 	;mov	eax, 1 ; Only one Cluster
  1924 0000CB34 A1[267F0100]        <1> 	mov	eax, [FAT_ClusterCounter]
  1925 0000CB39 66BB01FF            <1> 	mov	bx, 0FF01h ; BH = FFh -> ESI -> Dos drv desc. table
  1926                              <1> 		; BL = 1 -> add cluster(s)
  1927 0000CB3D B301                <1> 	mov	bl, 01h
  1928                              <1> 	; NOTE: EAX value will be added to Free Cluster Count
  1929                              <1> 	; (Free Cluster Count is decreased when EAX value is negative)
  1930 0000CB3F E8C6FCFFFF          <1>         call    calculate_fat_freespace
  1931                              <1> 	; ECX = 0 -> no error, ECX > 0 -> error or invalid return
  1932 0000CB44 21C9                <1> 	and	ecx, ecx ; ECX = 0 -> valid free sector count
  1933 0000CB46 7409                <1> 	jz	short loc_add_new_cluster_return_cluster_number
  1934                              <1> 
  1935                              <1> loc_add_new_cluster_recalc_FAT_freespace:
  1936 0000CB48 66BB00FF            <1> 	mov	bx, 0FF00h  ; recalculate free space
  1937 0000CB4C E8B9FCFFFF          <1>         call    calculate_fat_freespace
  1938                              <1> 	; cf = 0
  1939                              <1> loc_add_new_cluster_return_cluster_number:
  1940 0000CB51 89C1                <1> 	mov	ecx, eax ; Free sector count
  1941 0000CB53 A1[FC820100]        <1> 	mov	eax, [FAT_anc_FFCluster]
  1942                              <1> 	;mov	edi, Cluster_Buffer
  1943                              <1> 	; 25/07/2022 (EBX is not used by callers of this sprocedure)
  1944                              <1> 	;movzx	ebx, byte [esi+LD_BPB+SecPerClust]
  1945 0000CB58 31D2                <1> 	xor	edx, edx ; 0
  1946 0000CB5A C3                  <1>         retn
  1947                              <1> 
  1948                              <1> write_cluster:
  1949                              <1> 	; 15/10/2016
  1950                              <1> 	; 21/03/2016 (TRDOS 386 = TRDOS v2.0)
  1951                              <1> 	;
  1952                              <1> 	; INPUT ->
  1953                              <1> 	;	EAX = Cluster Number (Sector index for SINGLIX FS)
  1954                              <1> 	;	ESI = Logical DOS Drive Description Table address
  1955                              <1> 	;	EBX = Cluster (File R/W) Buffer address (max. 64KB)
  1956                              <1> 	;	Only for SINGLIX FS:
  1957                              <1> 	;	EDX = File Number (The 1st FDT address) 
  1958                              <1> 	; OUTPUT ->
  1959                              <1> 	;	cf = 1 -> Cluster can not be written onto disk
  1960                              <1> 	;	    EAX > 0 -> Error number
  1961                              <1> 	;	cf = 0 -> Cluster has been written successfully
  1962                              <1> 	;
  1963                              <1> 	; (Modified registers: EAX, ECX, EBX, EDX)
  1964                              <1> 	
  1965 0000CB5B 0FB64E13            <1> 	movzx	ecx, byte [esi+LD_BPB+BPB_SecPerClust] 
  1966                              <1> 	; CL = 1 = [esi+LD_FS_Reserved2] ; SectPerClust for Singlix FS
  1967                              <1> 
  1968                              <1> write_file_sectors: ; 16/03/2016
  1969 0000CB5F 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
  1970 0000CB63 761C                <1> 	jna	short write_fs_cluster
  1971                              <1> 
  1972                              <1> write_fat_file_sectors: 
  1973 0000CB65 83E802              <1> 	sub	eax, 2 ; Beginning cluster number is always 2
  1974 0000CB68 0FB65613            <1> 	movzx	edx, byte [esi+LD_BPB+BPB_SecPerClust] ; 18/03/2016 
  1975 0000CB6C F7E2                <1> 	mul	edx
  1976 0000CB6E 034668              <1> 	add	eax, [esi+LD_DATABegin] ; absolute address of the cluster
  1977                              <1> 
  1978                              <1> 	; EAX = Disk sector address
  1979                              <1> 	; ECX = Sector count
  1980                              <1> 	; EBX = Buffer address
  1981                              <1> 	; (EDX = 0)
  1982                              <1> 	; ESI = Logical DOS drive description table address	
  1983                              <1> 
  1984 0000CB71 E820520000          <1> 	call	disk_write
  1985 0000CB76 7306                <1> 	jnc	short wclust_retn
  1986                              <1> 	
  1987                              <1> 	; 15/10/2016 (1Dh -> 18)
  1988 0000CB78 B812000000          <1> 	mov	eax, 18 ; Drive not ready or write error !
  1989 0000CB7D C3                  <1> 	retn
  1990                              <1> 
  1991                              <1> wclust_retn:
  1992 0000CB7E 29C0                <1> 	sub	eax, eax ; 0
  1993 0000CB80 C3                  <1> 	retn
  1994                              <1> 
  1995                              <1> write_fs_cluster:
  1996                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
  1997                              <1> 	; 21/03/2016 (TRDOS 386 = TRDOS v2.0)
  1998                              <1> 	; Singlix FS
  1999                              <1> 	
  2000                              <1> 	; EAX = Cluster number is sector index number of the file (eax)
  2001                              <1> 	
  2002                              <1> 	; EDX = File number is the first File Descriptor Table address 
  2003                              <1> 	;	of the file. (Absolute address of the FDT).
  2004                              <1> 	
  2005                              <1> 	; eax = sector index (0 for the first sector)
  2006                              <1> 	; edx = FDT0 address
  2007                              <1> 		; 64 KB buffer = 128 sectors (limit) 
  2008                              <1> 	;mov	ecx, 128 ; maximum count of sectors (before eof) 
  2009                              <1> 	; 25/07/2022
  2010 0000CB81 29C9                <1> 	sub	ecx, ecx
  2011 0000CB83 B180                <1> 	mov	cl, 128
  2012                              <1> 	;call	write_fs_sectors
  2013                              <1> 	;retn
  2014                              <1> 	;jmp	short write_fs_sectors
  2015                              <1> 
  2016                              <1> write_fs_sectors:
  2017                              <1> 	; 21/03/2016 (TRDOS 386 = TRDOS v2.0)
  2018 0000CB85 F9                  <1> 	stc
  2019 0000CB86 C3                  <1> 	retn
  2020                              <1> 
  2021                              <1> get_cluster_by_index:
  2022                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
  2023                              <1> 	; 29/04/2016 (TRDOS 386 = TRDOS v2.0)
  2024                              <1> 	; INPUT ->
  2025                              <1> 	; 	EAX = Beginning cluster
  2026                              <1> 	; 	EDX = Sector index in disk/file section
  2027                              <1> 	;	      (Only for SINGLIX file system!)
  2028                              <1> 	; 	ECX = Cluster sequence number after the beginning cluster
  2029                              <1> 	; 	ESI = Logical DOS Drive Description Table address
  2030                              <1> 	; OUTPUT ->
  2031                              <1> 	;	EAX = Cluster number 
  2032                              <1> 	;	cf = 1 -> Error code in AL (EAX)
  2033                              <1> 	;
  2034                              <1> 	;(Modified registers: EAX, ECX, EBX, EDX)
  2035                              <1> 	;	
  2036 0000CB87 807E0301            <1> 	cmp	byte [esi+LD_FATType], 1
  2037 0000CB8B 721D                <1>         jb      short get_fs_section_by_index 
  2038                              <1> 
  2039 0000CB8D 3B4E78              <1> 	cmp	ecx, [esi+LD_Clusters]
  2040 0000CB90 7206                <1> 	jb	short gcbi_1
  2041                              <1> gcbi_0:
  2042                              <1> 	;stc
  2043                              <1> 	;mov	eax, 23h ; Cluster not available ! 
  2044                              <1> 			 ; MSDOS error code: FCB unavailable
  2045                              <1> 	; 25/07/2022
  2046 0000CB92 29C0                <1> 	sub	eax, eax
  2047                              <1> gcbi_4:
  2048 0000CB94 B023                <1> 	mov	al, 23h
  2049 0000CB96 F9                  <1> 	stc
  2050 0000CB97 C3                  <1> 	retn
  2051                              <1> gcbi_1:
  2052 0000CB98 51                  <1> 	push	ecx
  2053 0000CB99 E869F6FFFF          <1> 	call	get_next_cluster
  2054 0000CB9E 59                  <1> 	pop	ecx
  2055 0000CB9F 7203                <1> 	jc	short gcbi_3
  2056 0000CBA1 E2F5                <1> 	loop	gcbi_1
  2057                              <1> gcbi_2:
  2058 0000CBA3 C3                  <1> 	retn
  2059                              <1> gcbi_3:
  2060 0000CBA4 09C0                <1> 	or	eax, eax
  2061                              <1> 	;jz	short gcbi_0
  2062                              <1> 	; 25/07/2022
  2063 0000CBA6 74EC                <1> 	jz	short gcbi_4
  2064 0000CBA8 F5                  <1> 	cmc 	; stc
  2065 0000CBA9 C3                  <1> 	retn
  2066                              <1> 
  2067                              <1> get_fs_section_by_index:
  2068                              <1> 	; 29/04/2016 (TRDOS 386 = TRDOS v2.0)
  2069                              <1> 	; INPUT ->
  2070                              <1> 	; 	EAX = Beginning FDT number/address
  2071                              <1> 	; 	EDX = Sector index in disk/file section
  2072                              <1> 	; 	ECX = Sector sequence number after the beginning FDT
  2073                              <1> 	; 	ESI = Logical DOS Drive Description Table address
  2074                              <1> 	; OUTPUT ->
  2075                              <1> 	; 	EAX = FDT number/address
  2076                              <1> 	; 	EDX = Sector index of the section (0,1,2,3,4...)
  2077                              <1> 	;	cf = 1 -> Error code in AL (EAX)
  2078                              <1> 	;
  2079                              <1> 	;(Modified registers: EAX, ECX, EBX, EDX)
  2080                              <1> 	;
  2081 0000CBAA B8FFFFFFFF          <1> 	mov	eax, 0FFFFFFFFh
  2082 0000CBAF C3                  <1> 	retn
  2083                              <1> 
  2084                              <1> get_last_section:
  2085                              <1> 	; 22/10/2016 (TRDOS 386 = TRDOS v2.0)	
  2086                              <1> 	; INPUT ->
  2087                              <1> 	; 	EAX = (The 1st) FDT number/address
  2088                              <1> 	; 	ESI = Logical DOS Drive Description Table address
  2089                              <1> 	; OUTPUT ->
  2090                              <1> 	; 	EAX = FDT number/address of the last section
  2091                              <1> 	; 	EDX = Last sector of the section (0,1,2,3,4...)
  2092                              <1> 	;	[glc_index] = sector index number of the last sector
  2093                              <1> 	;		      (for file, not for the last section)  	
  2094                              <1> 	;		   	
  2095                              <1> 	;	cf = 1 -> Error code in AL (EAX)
  2096                              <1> 	;
  2097                              <1> 	;(Modified registers: EAX, ECX, EBX, EDX)
  2098                              <1> 	;
  2099 0000CBB0 B800000000          <1> 	mov	eax, 0
  2100 0000CBB5 BA00000000          <1> 	mov	edx, 0
  2101 0000CBBA C3                  <1> 	retn
  3312                                  %include 'trdosk6.s' ; 24/01/2016
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.6) - MAIN PROGRAM : trdosk6.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 29/08/2023  (Previous: 11/08/2022)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 24/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    11                              <1> ; u1.s (27/17/2015), u2.s (03/01/2016)
    12                              <1> ; ****************************************************************************
    13                              <1> ; Derived from TRDOS Operating System v1.0 (8086) source code by Erdogan Tan
    14                              <1> ; TRDOS2.ASM (09/11/2011)
    15                              <1> ; ----------------------------------------------------------------------------
    16                              <1> ; INT_21H.ASM (c) 2009-2011 Erdogan TAN  [14/11/2009] Last Update: 08/11/2011
    17                              <1> 
    18                              <1> ; Ref: Retro UNIX 386 v1.2 Kernel (v0.2.2.3) - ux.s - 15/07/2022
    19                              <1> 
    20                              <1> sysent: ; < enter to system call >
    21                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
    22                              <1> 	; 17/03/2017
    23                              <1> 	; 03/03/2017
    24                              <1> 	; 19/02/2017
    25                              <1> 	; 13/01/2017
    26                              <1> 	; 06/06/2016
    27                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
    28                              <1> 	; 16/04/2015 - 19/10/2015 (Retro UNIX 386 v1)
    29                              <1> 	; 10/04/2013 - 18/01/2014 (Retro UNIX 8086 v1)
    30                              <1> 	;
    31                              <1> 	; 'unkni' or 'sysent' is sytem entry from various traps. 
    32                              <1> 	; The trap type is determined and an indirect jump is made to 
    33                              <1> 	; the appropriate system call handler. If there is a trap inside
    34                              <1> 	; the system a jump to panic is made. All user registers are saved 
    35                              <1> 	; and u.sp points to the end of the users stack. The sys (trap)
    36                              <1> 	; instructor is decoded to get the the system code part (see
    37                              <1> 	; trap instruction in the PDP-11 handbook) and from this 
    38                              <1> 	; the indirect jump address is calculated. If a bad system call is
    39                              <1> 	; made, i.e., the limits of the jump table are exceeded, 'badsys'
    40                              <1> 	; is called. If the call is legitimate control passes to the
    41                              <1> 	; appropriate system routine.
    42                              <1> 	;
    43                              <1> 	; Calling sequence:
    44                              <1> 	;	Through a trap caused by any sys call outside the system.
    45                              <1> 	; Arguments:
    46                              <1> 	;	Arguments of particular system call.	
    47                              <1> 	; ...............................................................
    48                              <1> 	;	
    49                              <1> 	; Retro UNIX 8086 v1 modification: 
    50                              <1> 	;       System call number is in EAX register.
    51                              <1> 	;
    52                              <1> 	;       Other parameters are in EDX, EBX, ECX, ESI, EDI, EBP
    53                              <1> 	;	registers depending of function details.
    54                              <1>   	;
    55                              <1> 	; 16/04/2015
    56 0000CBBB 368925[14010300]    <1>         mov     [ss:u.sp], esp ; Kernel stack points to return address
    57                              <1> 
    58                              <1> 	; save user registers
    59 0000CBC2 1E                  <1> 	push	ds
    60 0000CBC3 06                  <1> 	push	es
    61 0000CBC4 0FA0                <1> 	push	fs
    62 0000CBC6 0FA8                <1> 	push	gs
    63 0000CBC8 60                  <1> 	pushad  ; eax, ecx, edx, ebx, esp -before pushad-, ebp, esi, edi
    64                              <1> 	;
    65                              <1> 	; ESPACE = [ss:u.sp] - esp ; 4*12 = 48 ; 17/09/2015 ; 06/06/2016
    66                              <1> 	; 	(ESPACE is size of space in kernel stack 
    67                              <1> 	;	for saving/restoring user registers.)
    68                              <1> 	;
    69 0000CBC9 50                  <1> 	push	eax ; 01/07/2015
    70 0000CBCA 66B81000            <1> 	mov     ax, KDATA
    71 0000CBCE 8ED8                <1>         mov     ds, ax
    72 0000CBD0 8EC0                <1>         mov     es, ax
    73 0000CBD2 8EE0                <1>         mov     fs, ax
    74 0000CBD4 8EE8                <1>         mov     gs, ax
    75 0000CBD6 A1[48770100]        <1> 	mov	eax, [k_page_dir]
    76 0000CBDB 0F22D8              <1> 	mov	cr3, eax
    77 0000CBDE 58                  <1> 	pop	eax ; 01/07/2015
    78                              <1> 	; 19/10/2015
    79 0000CBDF FC                  <1> 	cld
    80                              <1> 	;
    81 0000CBE0 FE05[10010300]      <1> 	inc	byte [sysflg]
    82                              <1> 		; incb sysflg / indicate a system routine is in progress
    83 0000CBE6 FB                  <1>         sti 	; 18/01/2014
    84                              <1> 	;jnz	panic ; 24/05/2013
    85                              <1> 		; beq 1f
    86                              <1> 		; jmp panic ; / called if trap inside system
    87                              <1> 	; 23/07/2022
    88 0000CBE7 7405                <1> 	jz	short sysent0
    89 0000CBE9 E91BA1FFFF          <1> 	jmp	panic
    90                              <1> ;1:
    91                              <1> sysent0:
    92                              <1> 	; 17/03/2017
    93 0000CBEE 80642438FE          <1> 	and	byte [esp+ESPACE+8], ~1 ; clear carry flag
    94                              <1> 
    95                              <1> 	; 16/04/2015
    96 0000CBF3 A3[1C010300]        <1> 	mov	[u.r0], eax
    97 0000CBF8 8925[18010300]      <1> 	mov	[u.usp], esp ; kernel stack points to user's registers
    98                              <1> 
    99                              <1> 	; 13/01/2017 (TRDOS 386 Feaure only !)
   100 0000CBFE 803D[90010300]00    <1> 	cmp	byte [u.t_lock], 0 ; timer interrupt lock ?
   101                              <1> 	;ja	sysrele		   ; yes, sys release only !!!
   102                              <1> 	; 23/07/2022
   103 0000CC05 7605                <1> 	jna	short sysent1
   104 0000CC07 E9FE010000          <1> 	jmp	sysrele
   105                              <1> 		; mov $s.syst+2,clockp
   106                              <1> 		; mov r0,-(sp) / save user registers 
   107                              <1> 		; mov sp,u.r0 / pointer to bottom of users stack 
   108                              <1> 			   ; / in u.r0
   109                              <1> 		; mov r1,-(sp)
   110                              <1> 		; mov r2,-(sp)
   111                              <1> 		; mov r3,-(sp)
   112                              <1> 		; mov r4,-(sp)
   113                              <1> 		; mov r5,-(sp)
   114                              <1> 		; mov ac,-(sp) / "accumulator" register for extended
   115                              <1> 		             ; / arithmetic unit
   116                              <1> 		; mov mq,-(sp) / "multiplier quotient" register for the
   117                              <1> 		             ; / extended arithmetic unit
   118                              <1> 		; mov sc,-(sp) / "step count" register for the extended
   119                              <1> 		             ; / arithmetic unit
   120                              <1> 		; mov sp,u.sp / u.sp points to top of users stack
   121                              <1> 		; mov 18.(sp),r0 / store pc in r0
   122                              <1> 		; mov -(r0),r0 / sys inst in r0      10400xxx
   123                              <1> 		; sub $sys,r0 / get xxx code
   124                              <1> sysent1:
   125 0000CC0C C1E002              <1> 	shl	eax, 2
   126                              <1> 		; asl r0 / multiply by 2 to jump indirect in bytes
   127 0000CC0F 3DB8000000          <1> 	cmp	eax, end_of_syscalls - syscalls
   128                              <1> 		; cmp r0,$2f-1f / limit of table (35) exceeded
   129                              <1> 	;jnb	short badsys
   130                              <1> 		; bhis badsys / yes, bad system call
   131 0000CC14 F5                  <1> 	cmc
   132 0000CC15 9C                  <1> 	pushf	
   133 0000CC16 50                  <1> 	push	eax
   134 0000CC17 8B2D[14010300]      <1>  	mov 	ebp, [u.sp] ; Kernel stack at the beginning of sys call
   135 0000CC1D B0FE                <1> 	mov	al, 0FEh ; 11111110b
   136 0000CC1F 1400                <1> 	adc	al, 0 ; al = al + cf
   137 0000CC21 204508              <1> 	and	[ebp+8], al ; flags (reset carry flag)
   138                              <1> 		; bic $341,20.(sp) / set users processor priority to 0 
   139                              <1> 				 ; / and clear carry bit
   140 0000CC24 5D                  <1> 	pop	ebp ; eax
   141 0000CC25 9D                  <1> 	popf
   142 0000CC26 720B                <1>         jc      short badsys ; 23/07/2022
   143 0000CC28 A1[1C010300]        <1> 	mov	eax, [u.r0]
   144                              <1> 	; system call registers: EAX, EDX, ECX, EBX, ESI, EDI
   145 0000CC2D FFA5[80CC0000]      <1> 	jmp	dword [ebp+syscalls]
   146                              <1> 		; jmp *1f(r0) / jump indirect thru table of addresses
   147                              <1> 		            ; / to proper system routine.
   148                              <1> 	; 30/07/2022
   149                              <1> 	; 23/07/2022
   150                              <1> badsys:
   151                              <1> 	; 25/12/2016
   152                              <1> 	; 18/04/2016 (TRDOS 386 = TRDOS v2.0)
   153                              <1> 	; 17/04/2011 (TRDOS v1.0, 'IFC.ASM')
   154                              <1> 	; 03/02/2011 ('trdos_ifc_routine')
   155                              <1> 	;
   156                              <1> 	; 16/04/2015 (Retro UNIX 386 v1, 'badsys')
   157                              <1> 	; (EIP, EAX values will be shown on screen with error message)
   158                              <1> 	; (EIP = 'CD 40h' instruction address -INT 40h-)
   159                              <1> 	; (EAX = Function number)  
   160                              <1> 	;
   161 0000CC33 FE05[6C010300]      <1> 	inc	byte [u.bsys]
   162                              <1> 	;
   163 0000CC39 8B1D[14010300]      <1> 	mov	ebx, [u.sp] ; esp at the beginning of 'sysent'
   164 0000CC3F 8B03                <1> 	mov	eax, [ebx] ; EIP (return address, not 'INT 30h' address)
   165                              <1> 	;sub	eax, 2 ; CDh, ##h
   166                              <1> 	; 30/07/2022
   167 0000CC41 48                  <1> 	dec	eax
   168 0000CC42 48                  <1> 	dec	eax
   169 0000CC43 E84975FFFF          <1> 	call	dwordtohex
   170 0000CC48 8915[D5360100]      <1> 	mov	[eip_str], edx
   171 0000CC4E A3[D9360100]        <1> 	mov	[eip_str+4], eax
   172 0000CC53 A1[1C010300]        <1> 	mov	eax, [u.r0]
   173 0000CC58 E83475FFFF          <1> 	call	dwordtohex
   174 0000CC5D 8915[C4360100]      <1> 	mov	[eax_str], edx
   175 0000CC63 A3[C8360100]        <1> 	mov	[eax_str+4], eax
   176                              <1> 
   177 0000CC68 66C705[B9360100]34- <1> 	mov	word [int_num_str], SYSCALL_INT_NUM ; 25/12/2016
   177 0000CC70 30                  <1>
   178                              <1> 
   179 0000CC71 BE[8B360100]        <1> 	mov	esi, ifc_msg ; "invalid funtion call !" msg (trdosk9.s)
   180 0000CC76 E82FA0FFFF          <1> 	call	print_msg
   181                              <1> 
   182 0000CC7B E92C020000          <1> 	jmp	sysexit
   183                              <1> 
   184                              <1> syscalls: ; 1:
   185                              <1> 	; 31/12/2017
   186                              <1> 	; 28/02/2017
   187                              <1> 	; 20/02/2017
   188                              <1> 	; 19/02/2017
   189                              <1> 	; 15/10/2016
   190                              <1> 	; 20/05/2016
   191                              <1> 	; 19/05/2016
   192                              <1> 	; 16/05/2016
   193                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
   194                              <1> 	; 21/09/2015
   195                              <1> 	; 01/07/2015
   196                              <1> 	; 16/04/2015 (32 bit address modification) 
   197 0000CC80 [F50C0100]          <1> 	dd sysver	; 0 ; Get TRDOS 386 version number (v2.0)	
   198 0000CC84 [ACCE0000]          <1> 	dd sysexit 	; 1
   199 0000CC88 [79D00000]          <1> 	dd sysfork 	; 2
   200 0000CC8C [06D40000]          <1> 	dd sysread 	; 3
   201 0000CC90 [25D40000]          <1> 	dd syswrite 	; 4
   202 0000CC94 [54D20000]          <1> 	dd sysopen 	; 5
   203 0000CC98 [DCD30000]          <1> 	dd sysclose 	; 6
   204 0000CC9C [01D00000]          <1> 	dd syswait 	; 7
   205 0000CCA0 [81D10000]          <1> 	dd syscreat 	; 8
   206 0000CCA4 [011B0100]          <1> 	dd sysrename	; 9  ; TRDOS 386, Rename File (31/12/2017)
   207 0000CCA8 [94160100]          <1> 	dd sysdelete	; 10 ; TRDOS 386, Delete File (29/12/2017)
   208 0000CCAC [43010100]          <1> 	dd sysexec 	; 11
   209 0000CCB0 [B0170100]          <1> 	dd syschdir 	; 12
   210 0000CCB4 [6B190100]          <1> 	dd systime 	; 13 ; TRDOS 386, Get Sys Date&Time (30/12/2017)
   211 0000CCB8 [9FD30000]          <1> 	dd sysmkdir 	; 14
   212 0000CCBC [E4170100]          <1> 	dd syschmod 	; 15 ; TRDOS 386, Change Attributes (30/12/2017) 
   213 0000CCC0 [FB160100]          <1> 	dd sysrmdir 	; 16 ; TRDOS 386, Remove Directory (29/12/2017)
   214 0000CCC4 [DF050100]          <1> 	dd sysbreak 	; 17
   215 0000CCC8 [C0180100]          <1> 	dd sysdrive 	; 18 ; TRDOS 386, Get/Set Current Drv (30/12/2017) 
   216 0000CCCC [20060100]          <1> 	dd sysseek 	; 19
   217 0000CCD0 [32060100]          <1> 	dd systell 	; 20
   218 0000CCD4 [171C0100]          <1> 	dd sysmem 	; 21 ; TRDOS 386, Get Total&Free Mem (31/12/2017)
   219 0000CCD8 [4D1C0100]          <1> 	dd sysprompt 	; 22 ; TRDOS 386, Change Cmd Prompt (31/12/2017)
   220 0000CCDC [8E1C0100]          <1> 	dd syspath 	; 23 ; TRDOS 386, Get/Set Run Path (31/12/2017)
   221 0000CCE0 [F31C0100]          <1> 	dd sysenv 	; 24 ; TRDOS 386, Get/Set Env Vars (31/12/2017)
   222 0000CCE4 [EC190100]          <1> 	dd sysstime 	; 25 ; TRDOS 386, Set Sys Date&Time (30/12/2017)
   223 0000CCE8 [98060100]          <1> 	dd sysquit 	; 26
   224 0000CCEC [8C060100]          <1> 	dd sysintr 	; 27
   225 0000CCF0 [0F190100]          <1> 	dd sysdir 	; 28 ; TRDOS 386, Get Curr Drive&Dir (30/12/2017) 
   226 0000CCF4 [38CD0000]          <1> 	dd sysemt 	; 29
   227 0000CCF8 [4A190100]          <1> 	dd sysldrvt	; 30 ; TRDOS 386, Get Logical DOS DDT (30/12/2017)
   228 0000CCFC [17D60000]          <1> 	dd sysvideo 	; 31 ; TRDOS 386 Video Functions (16/05/2016)
   229 0000CD00 [FB230100]          <1> 	dd sysaudio 	; 32 ; TRDOS 386 Audio Functions (16/05/2016)
   230 0000CD04 [82D40000]          <1> 	dd systimer 	; 33 ; TRDOS 386 Timer Functions (18/05/2016)
   231 0000CD08 [A4060100]          <1> 	dd syssleep 	; 34 ; Retro UNIX 8086 v1 feature only !
   232                              <1> 			     ; 11/06/2014
   233 0000CD0C [DE060100]          <1> 	dd sysmsg	; 35 ; Retro UNIX 386 v1 feature only !
   234                              <1> 			     ; 01/07/2015
   235 0000CD10 [F8070100]          <1> 	dd sysgeterr	; 36 ; Retro UNIX 386 v1 feature only !
   236                              <1> 			     ; 21/09/2015 - get last error number
   237 0000CD14 [6B160100]          <1> 	dd sysfpstat	; 37 ; TRDOS 386 FPU state option (28/02/2017)
   238 0000CD18 [040D0100]          <1> 	dd syspri 	; 38 ; change priority - TRDOS 386 (20/05/2016)
   239 0000CD1C [0ACE0000]          <1> 	dd sysrele	; 39 ; TRDOS 386 (19/05/2016) (0 -> 39)
   240 0000CD20 [2F0E0100]          <1> 	dd sysfff	; 40 ; Find First File - TRDOS 386 (15/10/2016)
   241 0000CD24 [030F0100]          <1> 	dd sysfnf	; 41 ; Find Next File - TRDOS 386 (15/10/2016)
   242 0000CD28 [59150100]          <1> 	dd sysalloc	; 42 ; Allocate contiguous memory block/pages
   243                              <1> 			     ; TRDOS 386 (19/02/2017) DMA buff fuctions		
   244 0000CD2C [13160100]          <1> 	dd sysdalloc	; 43 ; Deallocate contiguous memory block/pages
   245                              <1> 			     ; TRDOS 386 (19/02/2017) DMA buff fuctions
   246 0000CD30 [4E160100]          <1> 	dd syscalbac	; 44 ; IRQ Callback and Signal Response Byte
   247                              <1> 			     ; service setup - TRDOS 386 (20/02/2017)
   248                              <1> 			     ; 28/08/2017 (20/08/2017)	
   249 0000CD34 [812C0100]          <1> 	dd sysdma	; 45 ; TRDOS 386 - (ISA) DMA service
   250                              <1> 	
   251                              <1> end_of_syscalls:
   252                              <1> 
   253                              <1> sysemt: ; enable (or disable) multi tasking -time sharing-
   254                              <1> 	;
   255                              <1> 	; 08/08/2022
   256                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
   257                              <1> 	; 23/05/2016 - TRDOS 386 (TRDOS v2.0)
   258                              <1> 	; 14/05/2015 (Retro UNIX 386 v1)
   259                              <1> 	; 10/12/2013 - 20/04/2014 (Retro UNIX 8086 v1)
   260                              <1> 	;
   261                              <1> 	; Retro UNIX 8086 v1 modification: 
   262                              <1> 	;	'Enable Multi Tasking'  system call instead 
   263                              <1> 	;	of 'Emulator Trap' in original UNIX v1 for PDP-11.
   264                              <1> 	;
   265                              <1> 	; Retro UNIX 8086 v1 feature only!
   266                              <1> 	;	Using purpose: Kernel will start without time-out
   267                              <1> 	;	(internal clock/timer) functionality.
   268                              <1> 	;	Then etc/init will enable clock/timer for
   269                              <1> 	;	multi tasking. 
   270                              <1> 	;
   271                              <1> 	; INPUT ->
   272                              <1> 	;	BL = 0 -> disable multi tasking
   273                              <1> 	;	BL > 1 -> enable multi tasking (time sharing) 
   274                              <1> 	; OUTPUT ->
   275                              <1> 	;	none	
   276                              <1> 	;
   277                              <1> 	;  Note: Multi tasking is disabled during system
   278                              <1> 	;	 initialization, it must be enabled by using
   279                              <1> 	;	 this system call. (Otherwise, running proces 
   280                              <1> 	;	 will not be changed by another process within
   281                              <1> 	;	 run time sequence/schedule, if running process
   282                              <1> 	;	 will not 'release' itself. Only 'wakeup' procedure
   283                              <1> 	;	 for waiting processes and programmed timer events
   284                              <1> 	;	 for other processes can change running process 
   285                              <1> 	;	 while multi tasking is disabled.) ** 23/05/2016 **
   286                              <1> 
   287 0000CD38 803D[6E010300]00    <1> 	cmp	byte [u.uid], 0 ; root ?
   288                              <1> 	;ja	short error
   289                              <1> 	; 23/07/2022
   290                              <1> 	;ja	short badsys ; 14/05/2015
   291                              <1> 	; 08/08/2022
   292 0000CD3F 7605                <1> 	jna	short sysemt_root
   293 0000CD41 E9EDFEFFFF          <1> 	jmp	badsys
   294                              <1> sysemt_root:	; 08/08/2022
   295 0000CD46 FA                  <1> 	cli
   296 0000CD47 881D[D6830100]      <1> 	mov	[multi_tasking], bl ; 0 to disable, >0 to enable
   297 0000CD4D EB20                <1> 	jmp	sysret
   298                              <1> 
   299                              <1> error:
   300                              <1> 	; 18/05/2016
   301                              <1> 	; 13/05/2016
   302                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
   303                              <1> 	; 16/04/2015 - 17/09/2015 (Retro UNIX 386 v1)
   304                              <1> 	; 10/04/2013 - 07/08/2013 (Retro UNIX 8086 v1)
   305                              <1> 	;
   306                              <1> 	; 'error' merely sets the error bit off the processor status (c-bit)
   307                              <1> 	; then falls right into the 'sysret', 'sysrele' return sequence.
   308                              <1> 	;
   309                              <1> 	; INPUTS -> none
   310                              <1> 	; OUTPUTS ->
   311                              <1> 	;	processor status - carry (c) bit is set (means error)
   312                              <1> 	;
   313                              <1> 	; 26/05/2013 (Stack pointer must be reset here! 
   314                              <1> 	; 	      Because, jumps to error procedure
   315                              <1> 	;	      disrupts push-pop nesting balance)
   316                              <1> 	;
   317 0000CD4F 8B2D[14010300]      <1> 	mov	ebp, [u.sp] ; interrupt (system call) return (iretd) address
   318 0000CD55 804D0801            <1> 	or	byte [ebp+8], 1  ; set carry bit of flags register
   319                              <1> 				 ; (system call will return with cf = 1)
   320                              <1> 		; bis $1,20.(r1) / set c bit in processor status word below
   321                              <1> 		               ; / users stack
   322                              <1> 	; 17/09/2015
   323 0000CD59 83ED30              <1> 	sub	ebp, ESPACE ; 48 ; total size of stack frame ('sysdefs.inc')
   324                              <1> 				 ; for saving/restoring user registers	
   325                              <1> 	;cmp	ebp, [u.usp]
   326                              <1> 	;je	short err0	
   327 0000CD5C 892D[18010300]      <1> 	mov	[u.usp], ebp
   328                              <1> ;err0:
   329                              <1> 	; 01/09/2015
   330 0000CD62 8B25[18010300]      <1> 	mov	esp, [u.usp] 	    ; Retro Unix 8086 v1 modification!
   331                              <1> 				    ; 10/04/2013
   332                              <1> 				    ; (If an I/O error occurs during disk I/O,
   333                              <1> 				    ; related procedures will jump to 'error'
   334                              <1> 				    ; procedure directly without returning to 
   335                              <1> 				    ; the caller procedure. So, stack pointer
   336                              <1>                                     ; must be restored here.)
   337                              <1> 	; 13/05/2016
   338                              <1> 	; NOTE: (The last) error code is in 'u.error', it can be retrieved by
   339                              <1> 	;	'get last error' system call later. 	
   340                              <1> 
   341                              <1> 	; 03/09/2015 - 09/06/2015 - 07/08/2013
   342 0000CD68 C605[82010300]00    <1> 	mov 	byte [u.kcall], 0 ; namei_r, mkdir_w reset
   343                              <1> 
   344                              <1> sysret: ; < return from system call>
   345                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
   346                              <1> 	; 01/03/2017
   347                              <1> 	; 28/02/2017
   348                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
   349                              <1> 	; 16/04/2015 - 10/09/2015 (Retro UNIX 386 v1)
   350                              <1> 	; 10/04/2013 - 23/02/2014 (Retro UNIX 8086 v1)
   351                              <1> 	;
   352                              <1> 	; 'sysret' first checks to see if process is about to be 
   353                              <1> 	; terminated (u.bsys). If it is, 'sysexit' is called.
   354                              <1> 	; If not, following happens:	 
   355                              <1> 	; 	1) The user's stack pointer is restored.
   356                              <1> 	;	2) r1=0 and 'iget' is called to see if last mentioned
   357                              <1> 	;	   i-node has been modified. If it has, it is written out
   358                              <1> 	;	   via 'ppoke'.
   359                              <1> 	;	3) If the super block has been modified, it is written out
   360                              <1> 	;	   via 'ppoke'.				
   361                              <1> 	;	4) If the dismountable file system's super block has been
   362                              <1> 	;	   modified, it is written out to the specified device
   363                              <1> 	;	   via 'ppoke'.
   364                              <1> 	;	5) A check is made if user's time quantum (uquant) ran out
   365                              <1> 	;	   during his execution. If so, 'tswap' is called to give
   366                              <1> 	;	   another user a chance to run.
   367                              <1> 	;	6) 'sysret' now goes into 'sysrele'. 
   368                              <1> 	;	    (See 'sysrele' for conclusion.)		
   369                              <1> 	;
   370                              <1> 	; Calling sequence:
   371                              <1> 	;	jump table or 'br sysret'
   372                              <1> 	; Arguments: 
   373                              <1> 	;	-	
   374                              <1> 	; ...............................................................
   375                              <1> 	;	
   376                              <1> 	; ((AX=r1 for 'iget' input))
   377                              <1> 	;	
   378 0000CD6F 31C0                <1> 	xor	eax, eax ; 28/02/2017
   379                              <1> sysret0: ; 29/07/2015 (eax = 0, jump from sysexec)
   380 0000CD71 FEC0                <1> 	inc	al ; 04/05/2013
   381 0000CD73 3805[6C010300]      <1> 	cmp	[u.bsys], al ; 1
   382                              <1> 		; tstb u.bsys / is a process about to be terminated because
   383                              <1>         ;jnb	sysexit ; 04/05/2013
   384                              <1> 		; bne sysexit / of an error? yes, go to sysexit
   385                              <1> 	; 23/07/2022
   386 0000CD79 7205                <1> 	jb	short sysret1
   387 0000CD7B E92C010000          <1> 	jmp	sysexit
   388                              <1> sysret1:	; 23/07/2022
   389                              <1> 	;mov	esp, [u.usp] ; 24/05/2013 (that is not needed here)
   390                              <1> 		; mov u.sp,sp / no point stack to users stack
   391 0000CD80 FEC8                <1> 	dec 	al ; mov ax, 0
   392                              <1> 		; clr r1 / zero r1 to check last mentioned i-node
   393 0000CD82 E80E500000          <1> 	call	iget
   394                              <1> 		; jsr r0,iget / if last mentioned i-node has been modified
   395                              <1> 		            ; / it is written out
   396                              <1> 	; 10/01/2017
   397                              <1> 	; 09/01/2017
   398                              <1> ;sysrele: ; < release >
   399                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
   400                              <1> 	; 16/04/2015 - 14/10/2015 (Retro UNIX 386 v1)
   401                              <1> 	; 10/04/2013 - 07/03/2014 (Retro UNIX 8086 v1)
   402                              <1> 	;
   403                              <1> 	; 'sysrele' first calls 'tswap' if the time quantum for a user is
   404                              <1> 	;  zero (see 'sysret'). It then restores the user's registers and
   405                              <1> 	; turns off the system flag. It then checked to see if there is
   406                              <1> 	; an interrupt from the user by calling 'isintr'. If there is, 
   407                              <1> 	; the output gets flashed (see isintr) and interrupt action is
   408                              <1> 	; taken by a branch to 'intract'. If there is no interrupt from
   409                              <1> 	; the user, a rti is made.
   410                              <1> 	;
   411                              <1> 	; Calling sequence:
   412                              <1> 	;	Fall through a 'bne' in 'sysret' & ?
   413                              <1> 	; Arguments:
   414                              <1> 	;	-	
   415                              <1> 	; ...............................................................
   416                              <1> 	;	
   417                              <1> 	; 23/02/2014 (swapret)
   418                              <1> 	; 22/09/2013
   419                              <1> sysrel0: ;1:
   420 0000CD87 803D[64010300]00    <1> 	cmp	byte [u.quant], 0 ; 16/05/2013
   421                              <1> 		; tstb uquant / is the time quantum 0?
   422 0000CD8E 7705                <1>         ja      short swapret
   423                              <1> 		; bne 1f / no, don't swap it out
   424                              <1> sysrelease: ; 07/12/2013 (jump from 'clock')
   425 0000CD90 E8283E0000          <1> 	call	tswap
   426                              <1> 		; jsr r0,tswap / yes, swap it out
   427                              <1> 	
   428                              <1> ; Retro Unix 8086 v1 feature: return from 'swap' to 'swapret' address.
   429                              <1> swapret: ;1:
   430                              <1> 	; 10/09/2015
   431                              <1> 	; 01/09/2015
   432                              <1> 	; 14/05/2015
   433                              <1> 	; 16/04/2015 (Retro UNIX 386 v1 - 32 bit, pm modifications)
   434                              <1> 	; 26/05/2013 (Retro UNIX 8086 v1)
   435                              <1> 	; cli
   436                              <1> 	; 24/07/2015
   437                              <1> 	;
   438                              <1> 	;; 'esp' must be already equal to '[u.usp]' here ! 
   439                              <1> 	;; mov	esp, [u.usp]
   440                              <1> 
   441                              <1> 	; 22/09/2013
   442 0000CD95 E8FB4F0000          <1> 	call	isintr
   443                              <1> 	; 20/10/2013
   444 0000CD9A 7405                <1> 	jz	short sysrel1
   445 0000CD9C E8F4000000          <1> 	call	intract
   446                              <1> 		; jsr r0,isintr / is there an interrupt from the user
   447                              <1> 		;     br intract / yes, output gets flushed, take interrupt
   448                              <1> 		               ; / action
   449                              <1> sysrel1:
   450 0000CDA1 FA                  <1> 	cli	; 14/10/2015
   451                              <1> sysrel2:
   452                              <1> 	; 28/02/2017
   453                              <1> 	; Check if there is a (delayed) callback for current user/process
   454 0000CDA2 A0[93010300]        <1> 	mov	al, [u.irqwait]
   455 0000CDA7 240F                <1> 	and	al, 0Fh ; is there a waiting IRQ callback service ?
   456 0000CDA9 7444                <1> 	jz	short sysrel8 ; no
   457                              <1> 
   458                              <1> 	; Set return to IRQ callback service and return from the service
   459 0000CDAB 0FB6D8              <1> 	movzx	ebx, al
   460 0000CDAE 883D[93010300]      <1> 	mov 	[u.irqwait], bh ; 0 ; reset
   461 0000CDB4 8A9B[E2360100]      <1> 	mov	bl, [ebx+IRQenum] ; (available) IRQ index +1 (1 to 9)
   462                              <1> 	; 01/03/2017
   463 0000CDBA FECB                <1> 	dec	bl ; IRQ index number, 0 to 8
   464 0000CDBC 7831                <1> 	js	short sysrel8 ; 0 -> FFh (not in use!?) 
   465                              <1> 	;
   466 0000CDBE A0[6D010300]        <1> 	mov 	al, [u.uno] ; current process (user) number 
   467 0000CDC3 3883[20890100]      <1> 	cmp	[ebx+IRQ.owner], al
   468 0000CDC9 7524                <1> 	jne	short sysrel8 ; it is not the current user/process !?
   469 0000CDCB F683[32890100]01    <1> 	test	byte [ebx+IRQ.method], 1 ; callback ?
   470 0000CDD2 741B                <1> 	jz	short sysrel8 ; not a callback method !?
   471                              <1> 
   472 0000CDD4 8B93[44890100]      <1> 	mov	edx, [ebx+IRQ.addr] ; IRQ callback service address (virtual)
   473 0000CDDA C605[94010300]01    <1> 	mov	byte [u.r_lock], 1 ; IRQ callback service in progress flag
   474                              <1> 
   475 0000CDE1 E87F3E0000          <1> 	call	wswap ; save user's registers & status 
   476                              <1> 		      ;	(for return from IRQ callback service)
   477                              <1> 
   478 0000CDE6 8B2D[14010300]      <1> 	mov	ebp, [u.sp]; kernel's stack, points to EIP (user)
   479 0000CDEC 895500              <1> 	mov	[ebp], edx ; IRQ call back service address
   480                              <1> sysrel8:
   481 0000CDEF FE0D[10010300]      <1> 	dec	byte [sysflg]
   482                              <1> 		; decb sysflg / turn system flag off
   483                              <1> 	
   484 0000CDF5 A1[74010300]        <1> 	mov	eax, [u.pgdir]	
   485 0000CDFA 0F22D8              <1> 	mov	cr3, eax  ; 1st PDE points to Kernel Page Table 0 (1st 4 MB)
   486                              <1> 			  ; (others are different than kernel page tables) 
   487                              <1> 	; 10/09/2015
   488 0000CDFD 61                  <1> 	popad ; edi, esi, ebp, temp (icrement esp by 4), ebx, edx, ecx, eax
   489                              <1> 		; mov (sp)+,sc / restore user registers
   490                              <1> 		; mov (sp)+,mq
   491                              <1> 		; mov (sp)+,ac
   492                              <1> 		; mov (sp)+,r5
   493                              <1> 		; mov (sp)+,r4
   494                              <1> 		; mov (sp)+,r3
   495                              <1> 		; mov (sp)+,r2
   496                              <1> 	;
   497 0000CDFE A1[1C010300]        <1> 	mov	eax, [u.r0]  ; ((return value in EAX))
   498 0000CE03 0FA9                <1> 	pop	gs
   499 0000CE05 0FA1                <1> 	pop	fs
   500 0000CE07 07                  <1> 	pop	es
   501 0000CE08 1F                  <1> 	pop	ds
   502                              <1> 	;or	word [esp+8], 200h ; 22/01/2017 ; force enabling interrupts
   503 0000CE09 CF                  <1> 	iretd	
   504                              <1> 		; rti / no, return from interrupt
   505                              <1> 
   506                              <1> sysrele:
   507                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
   508                              <1> 	; 24/03/2017
   509                              <1> 	; 28/02/2017
   510                              <1> 	; 27/02/2017
   511                              <1> 	; 29/01/2017
   512                              <1> 	; 14/01/2017
   513                              <1> 	; 13/01/2017
   514                              <1> 	; 09/01/2017 - 10/01/2017 - 12/01/2017
   515                              <1> 	; Major modification for TRDOS 386 (CallBack return)
   516                              <1> 	;
   517                              <1> 	; 'sysrele' system call restores previously saved
   518                              <1> 	; registers and addresses of the process
   519                              <1> 	; (Main purpose -in TRDOS 386- is to return from
   520                              <1> 	; timer callback service routine in ring 3 -user mode-.)
   521                              <1> 	;
   522                              <1> 	; check if the process is in timer callback phase
   523 0000CE0A 803D[90010300]00    <1> 	cmp	byte [u.t_lock], 0 ; TIMER INT LOCK
   524                              <1> 	;je	short sysrel0 ; classic (Retro UNIX 386 type) sysrele
   525 0000CE11 7735                <1> 	ja	short sysrel3
   526                              <1> 	; 27/02/2017
   527 0000CE13 803D[94010300]00    <1> 	cmp	byte [u.r_lock], 0 ; IRQ callback lock	
   528                              <1> 	;jna	sysrel0 ; classic sysrele ; 24/03/2017
   529                              <1> 	; 23/07/2022
   530 0000CE1A 7705                <1> 	ja	short sysrel9
   531 0000CE1C E966FFFFFF          <1> 	jmp	sysrel0
   532                              <1> sysrel9:	; 23/07/2022
   533 0000CE21 E859000000          <1> 	call	sysrel7
   534 0000CE26 803D[94010300]00    <1> 	cmp	byte [u.r_lock], 0 ; IRQ callback service lock
   535 0000CE2D 7628                <1> 	jna	short sysrel4
   536 0000CE2F C605[94010300]00    <1> 	mov	byte [u.r_lock], 0 ; reset
   537                              <1> 	;mov	byte [u.irqwait], 0 ; reset ; 28/02/2017
   538 0000CE36 A0[95010300]        <1> 	mov	al, [u.r_mode]
   539 0000CE3B 08C0                <1> 	or	al, al
   540 0000CE3D 7518                <1> 	jnz	short sysrel4
   541 0000CE3F FEC8                <1> 	dec	al
   542 0000CE41 A2[95010300]        <1> 	mov	[u.r_mode], al ; 0FFh ; not necessary !?
   543 0000CE46 EB32                <1> 	jmp	short sysrel6		
   544                              <1> sysrel3:
   545                              <1> 	; 27/02/2017
   546 0000CE48 E832000000          <1> 	call	sysrel7
   547                              <1> 	; 14/01/2017
   548 0000CE4D 28C0                <1> 	sub	al, al
   549 0000CE4F 3805[90010300]      <1> 	cmp	[u.t_lock], al ; 0 ; TIMER INT LOCK
   550 0000CE55 770E                <1> 	ja	short sysrel5 ; yes
   551                              <1> sysrel4:
   552                              <1> 	; 29/01/2017
   553 0000CE57 8B44241C            <1> 	mov	eax, [esp+28] ; eax
   554 0000CE5B A3[1C010300]        <1> 	mov	[u.r0], eax
   555 0000CE60 E93DFFFFFF          <1> 	jmp	sysrel2
   556                              <1> sysrel5:
   557 0000CE65 A2[90010300]        <1> 	mov	[u.t_lock], al ; 0 ; reset
   558 0000CE6A A0[91010300]        <1> 	mov	al, [u.t_mode]
   559 0000CE6F 20C0                <1> 	and	al, al
   560                              <1> 	;jnz	short sysrel2 ; 0FFh ; user mode
   561 0000CE71 75E4                <1> 	jnz	short sysrel4 ; 29/01/2017
   562 0000CE73 FEC8                <1> 	dec	al
   563 0000CE75 A2[91010300]        <1> 	mov	[u.t_mode], al ; 0FFh ; not necessary !?
   564                              <1> sysrel6:
   565                              <1> 	; cpu will continue from the interrupted sytem call addr
   566 0000CE7A 61                  <1> 	popad		; edi, esi, ebp, esp, ebx, edx, ecx, eax
   567 0000CE7B 83C410              <1> 	add	esp, 16	; pass segment segisters: ds, es, fs, gs		
   568 0000CE7E CF                  <1> 	iretd		; eip, cs, eflags
   569                              <1> 
   570                              <1> sysrel7:
   571 0000CE7F 0FB61D[6D010300]    <1> 	movzx	ebx, byte [u.uno] ; current process number
   572                              <1> 	;shl	bx, 2
   573                              <1> 	; 23/07/2022
   574 0000CE86 C1E302              <1> 	shl	ebx, 2
   575                              <1> 	;cmp	[ebx+p.tcb-4], eax ; 0 ; is there callback address ?
   576                              <1> 	;jna	short sysrel0 
   577                              <1> 	; yes, reset callback address then restore process registers 
   578                              <1> 	;mov	[ebx+p.tcb-4], eax ; 0 ; reset
   579 0000CE89 8B83[6C000300]      <1> 	mov     eax, [ebx+p.upage-4] ; UPAGE address
   580 0000CE8F FA                  <1> 	cli	; disable interrupts till 'iretd'
   581 0000CE90 E9083E0000          <1> 	jmp	rswap ; restore process 'u' structure
   582                              <1>  
   583                              <1> intract: ; / interrupt action
   584                              <1> 	; 14/10/2015
   585                              <1> 	; 16/04/2015 (Retro UNIX 386 v1 - Beginning)
   586                              <1> 	; 09/05/2013 - 07/12/2013 (Retro UNIX 8086 v1)
   587                              <1> 	;
   588                              <1> 	; Retro UNIX 8086 v1 modification !
   589                              <1> 	; (Process/task switching and quit routine by using
   590                              <1> 	; Retro UNIX 8086 v1 keyboard interrupt output.))
   591                              <1> 	;
   592                              <1> 	; input -> 'u.quit'  (also value of 'u.intr' > 0)
   593                              <1> 	; output -> If value of 'u.quit' = FFFFh ('ctrl+brk' sign)
   594                              <1> 	;		'intract' will jump to 'sysexit'.
   595                              <1> 	;	    Intract will return to the caller 
   596                              <1> 	;		if value of 'u.quit' <> FFFFh. 	 
   597                              <1> 	; 14/10/2015
   598 0000CE95 FB                  <1> 	sti
   599                              <1> 	; 07/12/2013	
   600 0000CE96 66FF05[6A010300]    <1> 	inc 	word [u.quit]
   601 0000CE9D 7408                <1> 	jz	short intrct0 ; FFFFh -> 0
   602 0000CE9F 66FF0D[6A010300]    <1> 	dec	word [u.quit]
   603                              <1> 	; 16/04/2015
   604 0000CEA6 C3                  <1> 	retn
   605                              <1> intrct0:	
   606 0000CEA7 58                  <1> 	pop	eax ; call intract -> retn
   607                              <1> 	;
   608 0000CEA8 31C0                <1> 	xor 	eax, eax
   609 0000CEAA FEC0                <1> 	inc	al  ; mov ax, 1
   610                              <1> ;;;
   611                              <1> 	; UNIX v1 original 'intract' routine... 
   612                              <1> 	; / interrupt action
   613                              <1> 		;cmp *(sp),$rti / are you in a clock interrupt?
   614                              <1> 		; bne 1f / no, 1f
   615                              <1> 		; cmp (sp)+,(sp)+ / pop clock pointer
   616                              <1> 	; 1: / now in user area
   617                              <1> 		; mov r1,-(sp) / save r1
   618                              <1> 		; mov u.ttyp,r1 
   619                              <1> 			; / pointer to tty buffer in control-to r1
   620                              <1> 		; cmpb 6(r1),$177
   621                              <1> 			; / is the interrupt char equal to "del"
   622                              <1> 		; beq 1f / yes, 1f
   623                              <1> 		; clrb 6(r1) 
   624                              <1> 		        ; / no, clear the byte 
   625                              <1> 			; / (must be a quit character)
   626                              <1> 		; mov (sp)+,r1 / restore r1
   627                              <1> 		; clr u.quit / clear quit flag
   628                              <1> 		; bis $20,2(sp) 
   629                              <1> 		    	; / set trace for quit (sets t bit of 
   630                              <1> 			; / ps-trace trap)
   631                              <1> 		; rti   ;  / return from interrupt
   632                              <1> 	; 1: / interrupt char = del
   633                              <1> 		; clrb 6(r1) / clear the interrupt byte 
   634                              <1> 			   ; / in the buffer
   635                              <1> 		; mov (sp)+,r1 / restore r1
   636                              <1> 		; cmp u.intr,$core / should control be 
   637                              <1> 				; / transferred to loc core?
   638                              <1> 		; blo 1f
   639                              <1> 		; jmp *u.intr / user to do rti yes, 
   640                              <1> 				; / transfer to loc core
   641                              <1> 	; 1:
   642                              <1> 		; sys 1 / exit
   643                              <1> 
   644                              <1> sysexit: ; <terminate process>
   645                              <1> 	; 30/07/2022
   646                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
   647                              <1> 	; 14/11/2017
   648                              <1> 	; 27/05/2017
   649                              <1> 	; 10/04/2017
   650                              <1> 	; 26/02/2017 - 28/02/2017
   651                              <1> 	; 02/01/2017 - 23/01/2017
   652                              <1> 	; 06/06/2016 - 10/06/2016
   653                              <1> 	; 19/05/2016 - 23/05/2016
   654                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
   655                              <1> 	; 16/04/2015 - 01/09/2015 (Retro UNIX 386 v1)
   656                              <1> 	; 19/04/2013 - 14/02/2014 (Retro UNIX 8086 v1)
   657                              <1> 	;
   658                              <1> 	; 'sysexit' terminates a process. First each file that
   659                              <1> 	; the process has opened is closed by 'flose'. The process
   660                              <1> 	; status is then set to unused. The 'p.pid' table is then
   661                              <1> 	; searched to find children of the dying process. If any of
   662                              <1> 	; children are zombies (died by not waited for), they are
   663                              <1> 	; set free. The 'p.pid' table is then searched to find the
   664                              <1> 	; dying process's parent. When the parent is found, it is
   665                              <1> 	; checked to see if it is free or it is a zombie. If it is
   666                              <1> 	; one of these, the dying process just dies. If it is waiting
   667                              <1> 	; for a child process to die, it notified that it doesn't 
   668                              <1> 	; have to wait anymore by setting it's status from 2 to 1
   669                              <1> 	; (waiting to active). It is awakened and put on runq by
   670                              <1> 	; 'putlu'. The dying process enters a zombie state in which
   671                              <1> 	; it will never be run again but stays around until a 'wait'
   672                              <1> 	; is completed by it's parent process. If the parent is not
   673                              <1> 	; found, process just dies. This means 'swap' is called with
   674                              <1> 	; 'u.uno=0'. What this does is the 'wswap' is not called
   675                              <1> 	; to write out the process and 'rswap' reads the new process
   676                              <1> 	; over the one that dies..i.e., the dying process is 
   677                              <1> 	; overwritten and destroyed.	
   678                              <1>  	;
   679                              <1> 	; Calling sequence:
   680                              <1> 	;	sysexit or conditional branch.
   681                              <1> 	; Arguments:
   682                              <1> 	;	-	
   683                              <1> 	; ...............................................................
   684                              <1> 	;	
   685                              <1> 	; Retro UNIX 8086 v1 modification: 
   686                              <1> 	;       System call number (=1) is in EAX register.
   687                              <1> 	;
   688                              <1> 	;       Other parameters are in EDX, EBX, ECX, ESI, EDI, EBP
   689                              <1> 	;       registers depending of function details.
   690                              <1> 	;
   691                              <1> 	; ('swap' procedure is mostly different than original UNIX v1.)
   692                              <1> 	;
   693                              <1> ; / terminate process
   694                              <1> 	; AX = 1
   695 0000CEAC 6648                <1> 	dec 	ax ; 0
   696 0000CEAE 66A3[68010300]      <1> 	mov	[u.intr], ax ; 0
   697                              <1> 		; clr u.intr / clear interrupt control word
   698                              <1> 		; clr r1 / clear r1
   699                              <1> sysexit_0:
   700                              <1> 	; 30/07/2022
   701                              <1> 	; 23/01/2017
   702                              <1> 	; 02/01/2017
   703                              <1> 	; 10/06/2016
   704                              <1> 	; 06/06/2016
   705                              <1> 	; 23/05/2016
   706                              <1> 	; 19/05/2016 - TRDOS 386 (TRDOS v2.0)
   707                              <1> 	; Check and stop/clear timer event(s) of this (dying) process
   708                              <1> 	; if there is.
   709                              <1> 
   710                              <1> 	; 02/01/2017 
   711 0000CEB4 FA                  <1> 	cli	; disable interrupts
   712                              <1> 	; 23/01/2017 - reset timer frequency (to 18.2Hz)
   713 0000CEB5 B036                <1> 	mov	al, 00110110b ; 36h
   714 0000CEB7 E643                <1>  	out	43h, al
   715 0000CEB9 28C0                <1> 	sub	al, al ; 0
   716 0000CEBB E640                <1> 	out	40h, al ; LB
   717 0000CEBD E640                <1> 	out	40h, al ; HB
   718                              <1>  	; 
   719 0000CEBF 0FB61D[6D010300]    <1> 	movzx	ebx, byte [u.uno]
   720                              <1> 	;mov	bl, [u.uno] ; process number of dying process
   721 0000CEC6 3883[AF000300]      <1> 	cmp	byte [ebx+p.timer-1], al ; 0
   722 0000CECC 7639                <1> 	jna	short sysexit_12 ; no timer events for this process
   723 0000CECE 8883[AF000300]      <1> 	mov	byte [ebx+p.timer-1], al ; 0 ; reset
   724                              <1> 	;mov	al, [timer_events]
   725                              <1> 	;or	al, al
   726                              <1>  	;jz	short sysexit_12 ; no timer events
   727                              <1> 	;mov	cl, al
   728 0000CED4 8A0D[D7830100]      <1> 	mov	cl, [timer_events] ; 14/11/2017
   729                              <1> 	;cli	; disable interrupts 
   730 0000CEDA B410                <1> 	mov	ah, 16 ; number of available timer events
   731 0000CEDC BE[2C020300]        <1> 	mov	esi, timer_set ; beginning address of timer events
   732                              <1> sysexit_7:
   733 0000CEE1 8A06                <1> 	mov	al, [esi] ; process number (of timer event)
   734 0000CEE3 38D8                <1> 	cmp	al, bl ; process number comparison
   735 0000CEE5 7411                <1> 	je	short sysexit_10
   736 0000CEE7 20C0                <1> 	and	al, al
   737 0000CEE9 7404                <1> 	jz	short sysexit_9
   738                              <1> sysexit_8:
   739 0000CEEB FEC9                <1> 	dec	cl
   740 0000CEED 7416                <1> 	jz	short sysexit_11
   741                              <1> sysexit_9:
   742 0000CEEF FECC                <1> 	dec	ah
   743 0000CEF1 7414                <1> 	jz	short sysexit_12
   744 0000CEF3 83C610              <1> 	add	esi, 16
   745 0000CEF6 EBE9                <1> 	jmp	short sysexit_7
   746                              <1> 
   747                              <1> sysexit_10:
   748                              <1> 	;mov	byte [esi], 0
   749 0000CEF8 66C7060000          <1> 	mov	word [esi], 0
   750                              <1> 	;mov	dword [esi+12], 0
   751                              <1> 	;
   752 0000CEFD FE0D[D7830100]      <1> 	dec	byte [timer_events] ; 02/01/2017
   753                              <1> 	;
   754 0000CF03 EBE6                <1> 	jmp	short sysexit_8
   755                              <1> 
   756                              <1> sysexit_11:
   757                              <1> 	;sub	ax, ax ; 0 ; 26/02/2017
   758                              <1> 	; 30/07/2022
   759 0000CF05 29C0                <1> 	sub	eax, eax ; 0
   760                              <1> sysexit_12:
   761                              <1> 	; 26/02/2017 (Unlink IRQ callbacks belong to the user)
   762 0000CF07 803D[92010300]00    <1> 	cmp	byte [u.irqc], 0 ; Count of IRQ callbacks
   763 0000CF0E 7E2E                <1> 	jng	short sysexit_16 ; zero or invalid
   764                              <1> 	; 28/02/2017
   765                              <1> 	; clear IRQ callback flags (for 'sysrele' and 'sysret')
   766 0000CF10 A2[93010300]        <1> 	mov	[u.irqwait], al ; 0 ; force to clear waiting flag
   767 0000CF15 A2[94010300]        <1> 	mov	[u.r_lock], al ; 0 ; force to clear busy flag
   768 0000CF1A BE[20890100]        <1> 	mov	esi, IRQ.owner
   769                              <1> sysexit_13:	
   770 0000CF1F AC                  <1> 	lodsb
   771 0000CF20 3A05[6D010300]      <1> 	cmp	al, [u.uno] ; owner = current user ?
   772 0000CF26 750C                <1> 	jne	short sysexit_14
   773 0000CF28 C646FF00            <1> 	mov	byte [esi-1], 0 ; owner = 0 : Free
   774 0000CF2C FE0D[92010300]      <1> 	dec	byte [u.irqc]
   775 0000CF32 7408                <1> 	jz	short sysexit_15
   776                              <1> sysexit_14:
   777 0000CF34 81FE[28890100]      <1> 	cmp	esi, IRQ.owner + 8 ; the last IRQ index number ?
   778 0000CF3A 76E3                <1> 	jna	short sysexit_13 ; no
   779                              <1> sysexit_15:
   780 0000CF3C 30C0                <1> 	xor	al, al ; 0
   781                              <1> sysexit_16: ; 2:
   782 0000CF3E FB                  <1> 	sti	; enable interrupts 
   783                              <1> 	;
   784                              <1> 	; AX = 0
   785                              <1> sysexit_1: ; 1:
   786                              <1> 	; AX = File descriptor
   787                              <1> 		; / r1 has file descriptor (index to u.fp list)
   788                              <1> 		; / Search the whole list
   789 0000CF3F E8D8350000          <1> 	call	fclose
   790                              <1> 		; jsr r0,fclose / close all files the process opened
   791                              <1> 	;; ignore error return
   792                              <1> 		; br .+2 / ignore error return
   793                              <1> 	;inc	ax
   794 0000CF44 FEC0                <1> 	inc	al
   795                              <1> 		; inc r1 / increment file descriptor
   796                              <1> 	;cmp	ax, 10
   797 0000CF46 3C0A                <1> 	cmp	al, 10
   798                              <1> 		; cmp r1,$10. / end of u.fp list?
   799 0000CF48 72F5                <1> 	jb	short sysexit_1
   800                              <1> 		; blt 1b / no, go back
   801                              <1> 	;movzx	ebx, byte [u.uno]
   802 0000CF4A 8A1D[6D010300]      <1> 	mov	bl, [u.uno] ; 02/01/2017
   803                              <1> 		; movb	u.uno,r1 / yes, move dying process's number to r1
   804 0000CF50 88A3[5F000300]      <1> 	mov	[ebx+p.stat-1], ah ; 0, SFREE
   805                              <1> 		; clrb p.stat-1(r1) / free the process
   806                              <1> 	; 10/04/2017
   807 0000CF56 381D[99890100]      <1> 	cmp	[audio_user], bl
   808 0000CF5C 7518                <1> 	jne	short sysexit_17
   809                              <1> 	; reset audio device (current) owner and 'initializated' flag
   810 0000CF5E 883D[99890100]      <1> 	mov	[audio_user], bh ; 0
   811                              <1> 	; 27/05/2017
   812 0000CF64 8B0D[84890100]      <1> 	mov	ecx,  [audio_buffer]
   813 0000CF6A 09C9                <1> 	or	ecx, ecx
   814 0000CF6C 7408                <1> 	jz	short sysexit_17
   815                              <1> 	; 'deallocate_user_pages' is not necessary in sysexit !!!
   816                              <1> 	;push	ebx
   817                              <1> 	;mov	ebx, ecx
   818                              <1> 	;mov	ecx, [audio_buff_size]
   819                              <1> 	;call	deallocate_user_pages
   820                              <1> 	;; (Modified Registers -> EAX, EDX, ESI, EDI, EBX, ECX, EBP)
   821 0000CF6E 29C9                <1> 	sub	ecx, ecx
   822 0000CF70 890D[84890100]      <1> 	mov	[audio_buffer], ecx ; 0
   823                              <1> 	;pop	ebx
   824                              <1> sysexit_17:
   825                              <1> 	;shl	bx, 1
   826 0000CF76 D0E3                <1> 	shl	bl, 1
   827                              <1> 		; asl r1 / use r1 for index into the below tables
   828 0000CF78 668B8B[FEFF0200]    <1> 	mov	cx, [ebx+p.pid-2]
   829                              <1> 		; mov p.pid-2(r1),r3 / move dying process's name to r3
   830 0000CF7F 668B93[1E000300]    <1> 	mov	dx, [ebx+p.ppid-2]
   831                              <1> 		; mov p.ppid-2(r1),r4 / move its parents name to r4
   832                              <1> 	; xor 	bx, bx ; 0
   833 0000CF86 30DB                <1> 	xor	bl, bl ; 0
   834                              <1> 		; clr r2
   835 0000CF88 31F6                <1> 	xor	esi, esi ; 0
   836                              <1> 		; clr r5 / initialize reg
   837                              <1> sysexit_2: ; 1:
   838                              <1> 	        ; / find children of this dying process, 
   839                              <1> 		; / if they are zombies, free them
   840                              <1> 	;add	bx, 2
   841 0000CF8A 80C302              <1> 	add	bl, 2
   842                              <1> 		; add $2,r2 / search parent process table 
   843                              <1> 		          ; / for dying process's name
   844 0000CF8D 66398B[1E000300]    <1> 	cmp	[ebx+p.ppid-2], cx
   845                              <1> 		; cmp p.ppid-2(r2),r3 / found it?
   846 0000CF94 7513                <1> 	jne	short sysexit_4
   847                              <1> 		; bne 3f / no
   848                              <1> 	;shr	bx, 1
   849 0000CF96 D0EB                <1> 	shr	bl, 1
   850                              <1> 		; asr r2 / yes, it is a parent
   851 0000CF98 80BB[5F000300]03    <1> 	cmp	byte [ebx+p.stat-1], 3 ; SZOMB
   852                              <1> 		; cmpb p.stat-1(r2),$3 / is the child of this 
   853                              <1> 				     ; / dying process a zombie
   854 0000CF9F 7506                <1> 	jne	short sysexit_3 
   855                              <1> 		; bne 2f / no
   856 0000CFA1 88A3[5F000300]      <1> 	mov	[ebx+p.stat-1], ah ; 0, SFREE
   857                              <1> 		; clrb p.stat-1(r2) / yes, free the child process
   858                              <1> sysexit_3: ; 2:
   859                              <1> 	;shr	bx, 1
   860 0000CFA7 D0E3                <1> 	shl	bl, 1
   861                              <1> 		; asl r2
   862                              <1> sysexit_4: ; 3:
   863                              <1> 		; / search the process name table 
   864                              <1> 		; / for the dying process's parent
   865 0000CFA9 663993[FEFF0200]    <1> 	cmp	[ebx+p.pid-2], dx
   866                              <1> 		; cmp p.pid-2(r2),r4 / found it?
   867 0000CFB0 7502                <1> 	jne	short sysexit_5
   868                              <1> 		; bne 3f / no
   869 0000CFB2 89DE                <1> 	mov	esi, ebx
   870                              <1> 		; mov r2,r5 / yes, put index to p.pid table (parents
   871                              <1> 		          ; / process # x2) in r5
   872                              <1> sysexit_5: ; 3:
   873                              <1> 	;cmp	bx, nproc + nproc
   874 0000CFB4 80FB20              <1> 	cmp	bl, nproc + nproc
   875                              <1> 		; cmp r2,$nproc+nproc / has whole table been searched?
   876 0000CFB7 72D1                <1> 	jb	short sysexit_2
   877                              <1> 		; blt 1b / no, go back
   878                              <1> 		; mov r5,r1 / yes, r1 now has parents process # x2
   879 0000CFB9 21F6                <1> 	and	esi, esi ; r5=r1
   880 0000CFBB 7435                <1> 	jz	short sysexit_6
   881                              <1> 		; beq 2f / no parent has been found. 
   882                              <1> 		       ; / The process just dies
   883                              <1> 	;shr	si, 1
   884                              <1> 	; 23/07/2022
   885 0000CFBD D1EE                <1> 	shr	esi, 1
   886                              <1> 		; asr r1 / set up index to p.stat
   887 0000CFBF 8A86[5F000300]      <1> 	mov	al, [esi+p.stat-1]
   888                              <1> 		; movb p.stat-1(r1),r2 / move status of parent to r2
   889 0000CFC5 20C0                <1> 	and	al, al
   890 0000CFC7 7429                <1> 	jz	short sysexit_6
   891                              <1> 		; beq 2f / if its been freed, 2f
   892 0000CFC9 3C03                <1> 	cmp	al, 3
   893                              <1> 		; cmp r2,$3 / is parent a zombie?
   894 0000CFCB 7425                <1> 	je	short sysexit_6
   895                              <1> 		; beq 2f / yes, 2f
   896                              <1> 	; BH = 0
   897 0000CFCD 8A1D[6D010300]      <1> 	mov	bl, [u.uno]
   898                              <1> 		; movb u.uno,r3 / move dying process's number to r3
   899 0000CFD3 C683[5F000300]03    <1> 	mov	byte [ebx+p.stat-1], 3  ; SZOMB
   900                              <1> 		; movb $3,p.stat-1(r3) / make the process a zombie
   901 0000CFDA 3C01                <1> 	cmp	al, 1 ; SRUN
   902 0000CFDC 7414                <1> 	je	short sysexit_6
   903                              <1> 	;cmp	al, 2
   904                              <1> 		; cmp r2,$2 / is the parent waiting for 
   905                              <1> 			  ; / this child to die
   906                              <1> 	;jne	short sysexit_6	
   907                              <1> 		; bne 2f / yes, notify parent not to wait any more
   908                              <1> 	; p.stat = 2 --> waiting
   909                              <1> 	; p.stat = 4 --> sleeping
   910 0000CFDE C686[5F000300]01    <1> 	mov	byte [esi+p.stat-1], 1 ; SRUN
   911                              <1> 	;dec	byte [esi+p.stat-1]
   912                              <1> 		; decb	p.stat-1(r1) / awaken it by putting it (parent)
   913 0000CFE5 6689F0              <1> 	mov	ax, si ; r1  (process number in AL)
   914                              <1> 	; 
   915                              <1> 	;mov	ebx, runq + 4
   916                              <1> 		; mov $runq+4,r2 / on the runq
   917 0000CFE8 BB[0C010300]        <1> 	mov	ebx, runq+2 ; normal run queue ; 02/01/2017
   918 0000CFED E8E33C0000          <1> 	call	putlu
   919                              <1> 		; jsr r0, putlu
   920                              <1> sysexit_6: 
   921                              <1> 		; / the process dies
   922 0000CFF2 C605[6D010300]00    <1> 	mov	byte [u.uno], 0
   923                              <1> 		; clrb u.uno / put zero as the process number, 
   924                              <1> 	           ; / so "swap" will
   925 0000CFF9 E8D93B0000          <1> 	call	swap
   926                              <1> 		; jsr r0,swap / overwrite process with another process
   927                              <1> hlt_sys:
   928                              <1> 	;sti
   929                              <1> hlts0:
   930 0000CFFE F4                  <1> 	hlt
   931 0000CFFF EBFD                <1> 	jmp	short hlts0
   932                              <1> 		; 0 / and thereby kill it; halt?
   933                              <1> 
   934                              <1> syswait: ; < wait for a processs to die >
   935                              <1> 	; 30/07/2022
   936                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
   937                              <1> 	; 17/09/2015
   938                              <1> 	; 02/09/2015
   939                              <1> 	; 01/09/2015
   940                              <1> 	; 16/04/2015 (Retro UNIX 386 v1 - Beginning)
   941                              <1> 	; 24/05/2013 - 05/02/2014 (Retro UNIX 8086 v1)
   942                              <1> 	;
   943                              <1> 	; 'syswait' waits for a process die. 
   944                              <1> 	; It works in following way:
   945                              <1> 	;    1) From the parent process number, the parent's 
   946                              <1> 	; 	process name is found. The p.ppid table of parent
   947                              <1> 	;	names is then searched for this process name.
   948                              <1> 	;	If a match occurs, r2 contains child's process
   949                              <1> 	;	number. The child status is checked to see if it is
   950                              <1> 	;	a zombie, i.e; dead but not waited for (p.stat=3)
   951                              <1> 	;	If it is, the child process is freed and it's name
   952                              <1> 	;	is put in (u.r0). A return is then made via 'sysret'.
   953                              <1> 	;	If the child is not a zombie, nothing happens and
   954                              <1> 	;	the search goes on through the p.ppid table until
   955                              <1> 	;	all processes are checked or a zombie is found.
   956                              <1> 	;    2) If no zombies are found, a check is made to see if
   957                              <1> 	;	there are any children at all. If there are none,
   958                              <1> 	;	an error return is made. If there are, the parent's
   959                              <1> 	;	status is set to 2 (waiting for child to die),
   960                              <1> 	;	the parent is swapped out, and a branch to 'syswait'
   961                              <1> 	;	is made to wait on the next process.
   962                              <1> 	;
   963                              <1> 	; Calling sequence:
   964                              <1> 	;	?
   965                              <1> 	; Arguments:
   966                              <1> 	;	-
   967                              <1> 	; Inputs: - 
   968                              <1> 	; Outputs: if zombie found, it's name put in u.r0.	
   969                              <1> 	; ...............................................................
   970                              <1> 	;				
   971                              <1> 	
   972                              <1> ; / wait for a process to die
   973                              <1> 
   974                              <1> syswait_0:
   975 0000D001 0FB61D[6D010300]    <1> 	movzx	ebx, byte [u.uno] ; 01/09/2015
   976                              <1> 		; movb u.uno,r1 / put parents process number in r1
   977 0000D008 D0E3                <1> 	shl	bl, 1
   978                              <1> 	;shl	bx, 1
   979                              <1> 		; asl r1 / x2 to get index into p.pid table
   980 0000D00A 668B83[FEFF0200]    <1> 	mov	ax, [ebx+p.pid-2]
   981                              <1> 		; mov p.pid-2(r1),r1 / get the name of this process
   982 0000D011 31F6                <1> 	xor	esi, esi
   983                              <1> 		; clr r2
   984 0000D013 31C9                <1> 	xor	ecx, ecx ; 30/10/2013
   985                              <1> 	;xor 	cl, cl
   986                              <1> 		; clr r3 / initialize reg 3
   987                              <1> syswait_1: ; 1:
   988                              <1> 	;add	si, 2
   989                              <1> 	; 23/07/2022
   990 0000D015 46                  <1> 	inc	esi
   991 0000D016 46                  <1> 	inc	esi
   992                              <1> 		; add $2,r2 / use r2 for index into p.ppid table
   993                              <1> 			  ; / search table of parent processes 
   994                              <1> 			  ; / for this process name
   995 0000D017 663B86[1E000300]    <1> 	cmp	ax, [esi+p.ppid-2]
   996                              <1> 		; cmp p.ppid-2(r2),r1 / r2 will contain the childs 
   997                              <1> 			            ; / process number
   998 0000D01E 7531                <1> 	jne	short syswait_3
   999                              <1> 		;bne 3f / branch if no match of parent process name
  1000                              <1> 	;inc	cx
  1001 0000D020 FEC1                <1> 	inc	cl
  1002                              <1> 		;inc r3 / yes, a match, r3 indicates number of children
  1003                              <1> 	;shr	si, 1
  1004                              <1> 	; 23/07/2022
  1005 0000D022 D1EE                <1> 	shr	esi, 1 
  1006                              <1> 		; asr r2 / r2/2 to get index to p.stat table
  1007                              <1> 	; The possible states ('p.stat' values) of a process are:
  1008                              <1> 	;	0 = free or unused
  1009                              <1> 	;	1 = active
  1010                              <1> 	;	2 = waiting for a child process to die
  1011                              <1> 	;	3 = terminated, but not yet waited for (zombie).	
  1012 0000D024 80BE[5F000300]03    <1> 	cmp	byte [esi+p.stat-1], 3 ; SZOMB, 05/02/2014
  1013                              <1> 		; cmpb p.stat-1(r2),$3 / is the child process a zombie?
  1014 0000D02B 7522                <1> 	jne	short syswait_2
  1015                              <1> 		; bne 2f / no, skip it
  1016 0000D02D 88BE[5F000300]      <1> 	mov	[esi+p.stat-1], bh ; 0
  1017                              <1> 		; clrb p.stat-1(r2) / yes, free it
  1018                              <1> 	;shl	si, 1
  1019                              <1> 	; 23/07/2022
  1020 0000D033 D1E6                <1> 	shl	esi, 1
  1021                              <1> 		; asl r2 / r2x2 to get index into p.pid table
  1022 0000D035 0FB786[FEFF0200]    <1> 	movzx	eax, word [esi+p.pid-2]
  1023 0000D03C A3[1C010300]        <1> 	mov	[u.r0], eax
  1024                              <1> 		; mov p.pid-2(r2),*u.r0 
  1025                              <1> 			      ; / put childs process name in (u.r0)
  1026                              <1> 	;
  1027                              <1> 	; Retro UNIX 386 v1 modification ! (17/09/2015)
  1028                              <1> 	;
  1029                              <1> 	; Parent process ID -p.ppid- field (of the child process)
  1030                              <1> 	; must be cleared in order to prevent infinitive 'syswait'
  1031                              <1> 	; system call loop from the application/program if it calls
  1032                              <1> 	; 'syswait' again (mistakenly) while there is not a zombie
  1033                              <1> 	; or running child process to wait. ('forktest.s', 17/09/2015)
  1034                              <1> 	;
  1035                              <1> 	; Note: syswait will return with error if there is not a
  1036                              <1> 	;       zombie or running process to wait.	
  1037                              <1> 	
  1038                              <1> 	;sub	ax, ax
  1039                              <1> 	; 30/07/2022
  1040 0000D041 29C0                <1> 	sub	eax, eax ; 0
  1041 0000D043 668986[1E000300]    <1> 	mov 	[esi+p.ppid-2], ax ; 0 ; 17/09/2015
  1042 0000D04A E922FDFFFF          <1> 	jmp	sysret0 ; ax = 0
  1043                              <1> 	;
  1044                              <1> 	;jmp	sysret
  1045                              <1> 		; br sysret1 / return cause child is dead
  1046                              <1> syswait_2: ; 2:
  1047                              <1> 	;shl	si, 1
  1048                              <1> 	; 23/07/2022
  1049 0000D04F D1E6                <1> 	shl	esi, 1
  1050                              <1> 		; asl r2 / r2x2 to get index into p.ppid table
  1051                              <1> syswait_3: ; 3:
  1052 0000D051 6683FE20            <1> 	cmp	si, nproc+nproc
  1053                              <1> 		; cmp r2,$nproc+nproc / have all processes been checked?
  1054 0000D055 72BE                <1> 	jb	short syswait_1
  1055                              <1> 		; blt 1b / no, continue search
  1056                              <1> 	;and	cx, cx
  1057 0000D057 20C9                <1> 	and	cl, cl
  1058                              <1> 		; tst r3 / one gets here if there are no children 
  1059                              <1> 		       ; / or children that are still active
  1060                              <1> 	; 30/10/2013
  1061 0000D059 750B                <1> 	jnz	short syswait_4
  1062                              <1> 	;jz	error
  1063                              <1> 		; beq error1 / there are no children, error
  1064 0000D05B 890D[1C010300]      <1> 	mov	[u.r0], ecx ; 0
  1065 0000D061 E9E9FCFFFF          <1> 	jmp	error
  1066                              <1> syswait_4:
  1067 0000D066 8A1D[6D010300]      <1> 	mov	bl, [u.uno]
  1068                              <1> 		; movb u.uno,r1 / there are children so put 
  1069                              <1> 			      ; / parent process number in r1
  1070 0000D06C FE83[5F000300]      <1> 	inc	byte [ebx+p.stat-1] ; 2, SWAIT, 05/02/2014
  1071                              <1> 		; incb p.stat-1(r1) / it is waiting for 
  1072                              <1> 				  ; / other children to die
  1073                              <1> 	; 04/11/2013
  1074 0000D072 E8603B0000          <1> 	call	swap
  1075                              <1> 		; jsr r0,swap / swap it out, because it's waiting
  1076 0000D077 EB88                <1> 	jmp	syswait_0
  1077                              <1> 		; br syswait / wait on next process
  1078                              <1> 
  1079                              <1> sysfork: ; < create a new process >
  1080                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
  1081                              <1> 	; 02/01/2017 (TRDOS 386 modification)
  1082                              <1> 	; 04/09/2015 - 18/05/2015
  1083                              <1> 	; 28/08/2015 - 01/09/2015 - 02/09/2015
  1084                              <1> 	; 09/05/2015 - 10/05/2015 - 14/05/2015
  1085                              <1> 	; 06/05/2015 (Retro UNIX 386 v1 - Beginning)
  1086                              <1> 	; 24/05/2013 - 14/02/2014 (Retro UNIX 8086 v1)
  1087                              <1> 	;
  1088                              <1> 	; 'sysfork' creates a new process. This process is referred
  1089                              <1> 	; to as the child process. This new process core image is
  1090                              <1> 	; a copy of that of the caller of 'sysfork'. The only
  1091                              <1> 	; distinction is the return location and the fact that (u.r0)
  1092                              <1> 	; in the old process (parent) contains the process id (p.pid)
  1093                              <1> 	; of the new process (child). This id is used by 'syswait'.
  1094                              <1> 	; 'sysfork' works in the following manner: 	
  1095                              <1> 	;    1) The process status table (p.stat) is searched to find
  1096                              <1> 	;	a process number that is unused. If none are found
  1097                              <1> 	;	an error occurs.
  1098                              <1> 	;    2) when one is found, it becomes the child process number
  1099                              <1> 	;	and it's status (p.stat) is set to active.
  1100                              <1> 	;    3) If the parent had a control tty, the interrupt 
  1101                              <1> 	;	character in that tty buffer is cleared.
  1102                              <1> 	;    4) The child process is put on the lowest priority run 
  1103                              <1> 	;	queue via 'putlu'.
  1104                              <1> 	;    5) A new process name is gotten from 'mpid' (actually 
  1105                              <1> 	;	it is a unique number) and is put in the child's unique
  1106                              <1> 	;	identifier; process id (p.pid).
  1107                              <1> 	;    6) The process name of the parent is then obtained and
  1108                              <1> 	;	placed in the unique identifier of the parent process
  1109                              <1> 	;	name is then put in 'u.r0'.	
  1110                              <1> 	;    7) The child process is then written out on disk by
  1111                              <1> 	;	'wswap',i.e., the parent process is copied onto disk
  1112                              <1> 	;	and the child is born. (The child process is written 
  1113                              <1> 	;	out on disk/drum with 'u.uno' being the child process
  1114                              <1> 	;	number.)
  1115                              <1> 	;    8) The parent process number is then restored to 'u.uno'.
  1116                              <1> 	;    9) The child process name is put in 'u.r0'.
  1117                              <1> 	;   10) The pc on the stack sp + 18 is incremented by 2 to
  1118                              <1> 	;	create the return address for the parent process.
  1119                              <1> 	;   11) The 'u.fp' list as then searched to see what files
  1120                              <1> 	;	the parent has opened. For each file the parent has
  1121                              <1> 	;	opened, the corresponding 'fsp' entry must be updated
  1122                              <1> 	;	to indicate that the child process also has opened
  1123                              <1> 	;	the file. A branch to 'sysret' is then made.	 			 				
  1124                              <1> 	;
  1125                              <1> 	; Calling sequence:
  1126                              <1> 	;	from shell ?
  1127                              <1> 	; Arguments:
  1128                              <1> 	;	-
  1129                              <1> 	; Inputs: -
  1130                              <1> 	; Outputs: *u.r0 - child process name
  1131                              <1> 	; ...............................................................
  1132                              <1> 	;	
  1133                              <1> 	; Retro UNIX 8086 v1 modification: 
  1134                              <1> 	;	AX = r0 = PID (>0) (at the return of 'sysfork')
  1135                              <1> 	;	= process id of child a parent process returns
  1136                              <1> 	;	= process id of parent when a child process returns
  1137                              <1> 	;
  1138                              <1> 	;       In original UNIX v1, sysfork is called and returns as
  1139                              <1> 	;	in following manner: (with an example: c library, fork)
  1140                              <1> 	;	
  1141                              <1> 	;	1:
  1142                              <1> 	;		sys	fork
  1143                              <1> 	;			br 1f  / child process returns here
  1144                              <1> 	;		bes	2f     / parent process returns here
  1145                              <1> 	;		/ pid of new process in r0
  1146                              <1> 	;		rts	pc
  1147                              <1> 	;	2: / parent process condionally branches here
  1148                              <1> 	;		mov	$-1,r0 / pid = -1 means error return
  1149                              <1> 	;		rts	pc
  1150                              <1> 	;
  1151                              <1> 	;	1: / child process brances here
  1152                              <1> 	;		clr	r0   / pid = 0 in child process
  1153                              <1> 	;		rts	pc
  1154                              <1> 	;
  1155                              <1> 	;	In UNIX v7x86 (386) by Robert Nordier (1999)
  1156                              <1> 	;		// pid = fork();
  1157                              <1> 	;		//
  1158                              <1> 	;		// pid == 0 in child process; 
  1159                              <1> 	;		// pid == -1 means error return
  1160                              <1> 	;		// in child, 
  1161                              <1> 	;		//	parents id is in par_uid if needed
  1162                              <1> 	;		
  1163                              <1> 	;		_fork:
  1164                              <1> 	;			mov	$.fork,eax
  1165                              <1> 	;			int	$0x30
  1166                              <1> 	;			jmp	1f
  1167                              <1> 	;			jnc	2f
  1168                              <1> 	;			jmp	cerror
  1169                              <1> 	;		1:
  1170                              <1> 	;			mov	eax,_par_uid
  1171                              <1> 	;			xor	eax,eax
  1172                              <1> 	;		2:
  1173                              <1> 	;			ret
  1174                              <1> 	;
  1175                              <1> 	;	In Retro UNIX 8086 v1,
  1176                              <1> 	;	'sysfork' returns in following manner:
  1177                              <1> 	;	
  1178                              <1> 	;		mov	ax, sys_fork
  1179                              <1> 	;		mov	bx, offset @f ; routine for child
  1180                              <1> 	;		int	20h
  1181                              <1> 	;		jc	error
  1182                              <1> 	;		
  1183                              <1> 	;	; Routine for parent process here (just after 'jc')
  1184                              <1> 	;		mov	word ptr [pid_of_child], ax
  1185                              <1> 	;		jmp	next_routine_for_parent	
  1186                              <1> 	;
  1187                              <1> 	;	@@: ; routine for child process here				
  1188                              <1> 	;		....	
  1189                              <1> 	;	NOTE: 'sysfork' returns to specified offset
  1190                              <1> 	;	       for child process by using BX input.
  1191                              <1> 	;	      (at first, parent process will return then 
  1192                              <1> 	;	      child process will return -after swapped in-
  1193                              <1> 	;	      'syswait' is needed in parent process
  1194                              <1> 	;	      if return from child process will be waited for.)
  1195                              <1> 	;	  				
  1196                              <1> 	
  1197                              <1> ; / create a new process
  1198                              <1> 	; EBX = return address for child process 
  1199                              <1> 	     ; (Retro UNIX 8086 v1 modification !)
  1200 0000D079 31F6                <1> 	xor 	esi, esi
  1201                              <1> 		; clr r1
  1202                              <1> sysfork_1: ; 1: / search p.stat table for unused process number
  1203 0000D07B 46                  <1> 	inc	esi
  1204                              <1> 		; inc r1
  1205 0000D07C 80BE[5F000300]00    <1> 	cmp	byte [esi+p.stat-1], 0 ; SFREE, 05/02/2014
  1206                              <1> 		; tstb p.stat-1(r1) / is process active, unused, dead
  1207 0000D083 760B                <1> 	jna	short sysfork_2	
  1208                              <1> 		; beq 1f / it's unused so branch
  1209 0000D085 6683FE10            <1> 	cmp	si, nproc
  1210                              <1> 		; cmp r1,$nproc / all processes checked
  1211 0000D089 72F0                <1> 	jb	short sysfork_1
  1212                              <1> 		; blt 1b / no, branch back
  1213                              <1> 	;
  1214                              <1> 	; Retro UNIX 8086 v1. modification:
  1215                              <1> 	;	Parent process returns from 'sysfork' to address 
  1216                              <1> 	;	which is just after 'sysfork' system call in parent
  1217                              <1> 	;	process. Child process returns to address which is put
  1218                              <1> 	;	in BX register by parent process for 'sysfork'. 
  1219                              <1> 	;
  1220                              <1> 		; add $2,18.(sp) / add 2 to pc when trap occured, points
  1221                              <1> 		             ; / to old process return
  1222                              <1> 		; br error1 / no room for a new process
  1223                              <1> sysfork_err:
  1224 0000D08B E9BFFCFFFF          <1> 	jmp	error
  1225                              <1> sysfork_2: ; 1:
  1226 0000D090 E85E86FFFF          <1> 	call	allocate_page
  1227                              <1> 	;jc	error
  1228                              <1> 	; 23/07/2022
  1229 0000D095 72F4                <1> 	jc	short sysfork_err
  1230 0000D097 50                  <1> 	push	eax   ; UPAGE (user structure page) address
  1231                              <1> 	; Retro UNIX 386 v1 modification!
  1232 0000D098 E84688FFFF          <1> 	call	duplicate_page_dir
  1233                              <1> 		; EAX = New page directory 
  1234 0000D09D 730B                <1> 	jnc	short sysfork_3
  1235 0000D09F 58                  <1> 	pop	eax   ; UPAGE (user structure page) address
  1236 0000D0A0 E80D88FFFF          <1> 	call 	deallocate_page
  1237 0000D0A5 E9A5FCFFFF          <1> 	jmp	error
  1238                              <1> sysfork_3:
  1239                              <1> 	; Retro UNIX 386 v1 modification !
  1240 0000D0AA 56                  <1> 	push	esi
  1241 0000D0AB E8B53B0000          <1> 	call	wswap ; save current user (u) structure, user registers
  1242                              <1> 		      ; and interrupt return components (for IRET)
  1243 0000D0B0 8705[74010300]      <1> 	xchg	eax, [u.pgdir] ; page directory of the child process
  1244 0000D0B6 A3[78010300]        <1> 	mov	[u.ppgdir], eax ; page directory of the parent process
  1245 0000D0BB 5E                  <1> 	pop	esi
  1246 0000D0BC 58                  <1> 	pop	eax   ; UPAGE (user structure page) address
  1247                              <1> 		; [u.usp] = esp
  1248 0000D0BD 89F7                <1> 	mov	edi, esi
  1249                              <1> 	;shl	di, 2
  1250                              <1> 	; 23/07/2022
  1251 0000D0BF C1E702              <1> 	shl	edi, 2
  1252 0000D0C2 8987[6C000300]      <1> 	mov	[edi+p.upage-4], eax ; memory page for 'user' struct
  1253 0000D0C8 A3[70010300]        <1> 	mov	[u.upage], eax ; memory page for 'user' struct (child)
  1254                              <1> 	; 28/08/2015
  1255 0000D0CD 0FB605[6D010300]    <1> 	movzx	eax, byte [u.uno] ; parent process number
  1256                              <1> 		; movb u.uno,-(sp) / save parent process number
  1257 0000D0D4 89C7                <1> 	mov	edi, eax
  1258 0000D0D6 50                  <1>         push	eax ; ** 
  1259 0000D0D7 8A87[3F000300]      <1> 	mov     al, [edi+p.ttyc-1] ; console tty (parent)
  1260                              <1> 	; 18/09/2015
  1261                              <1> 	;;mov	[esi+p.ttyc-1], al ; set child's console tty
  1262                              <1> 	;;mov	[esi+p.waitc-1], ah ; 0 ; reset child's wait channel
  1263                              <1> 	;mov    [esi+p.ttyc-1], ax ; al - set child's console tty
  1264                              <1> 				   ; ah - reset child's wait channel	
  1265                              <1> 	; 23/07/2022
  1266 0000D0DD 8886[3F000300]      <1> 	mov	[esi+p.ttyc-1], al ; set child's console tty
  1267 0000D0E3 89F0                <1> 	mov	eax, esi
  1268 0000D0E5 A2[6D010300]        <1> 	mov	[u.uno], al ; child process number
  1269                              <1> 		;movb r1,u.uno / set child process number to r1
  1270 0000D0EA FE86[5F000300]      <1>         inc     byte [esi+p.stat-1] ; 1, SRUN, 05/02/2014
  1271                              <1> 		; incb p.stat-1(r1) / set p.stat entry for child 
  1272                              <1> 				; / process to active status
  1273                              <1> 		; mov u.ttyp,r2 / put pointer to parent process' 
  1274                              <1> 			      ; / control tty buffer in r2
  1275                              <1>                 ; beq 2f / branch, if no such tty assigned
  1276                              <1> 		; clrb 6(r2) / clear interrupt character in tty buffer
  1277                              <1> 	; 2:
  1278 0000D0F0 53                  <1> 	push	ebx  ; * return address for the child process
  1279                              <1> 		     ; * Retro UNIX 8086 v1 feature only !	
  1280                              <1> 	; (Retro UNIX 8086 v1 modification!)
  1281                              <1> 		; mov $runq+4,r2
  1282 0000D0F1 BB[0C010300]        <1> 	mov	ebx, runq+2 ; normal run queue ; 02/01/2017  
  1283 0000D0F6 E8DA3B0000          <1> 	call	putlu
  1284                              <1>  		; jsr r0,putlu / put child process on lowest priority 
  1285                              <1> 			   ; / run queue
  1286                              <1> 	; 23/07/2022
  1287 0000D0FB D1E6                <1> 	shl	esi, 1
  1288                              <1> 	;shl	si, 1
  1289                              <1> 		; asl r1 / multiply r1 by 2 to get index 
  1290                              <1> 		       ; / into p.pid table
  1291 0000D0FD 66FF05[04010300]    <1> 	inc	word [mpid]
  1292                              <1> 		; inc mpid / increment m.pid; get a new process name
  1293 0000D104 66A1[04010300]      <1> 	mov	ax, [mpid]
  1294 0000D10A 668986[FEFF0200]    <1> 	mov	[esi+p.pid-2], ax
  1295                              <1> 		;mov mpid,p.pid-2(r1) / put new process name 
  1296                              <1> 				    ; / in child process' name slot
  1297 0000D111 5A                  <1> 	pop	edx  ; * return address for the child process
  1298                              <1> 		     ; * Retro UNIX 8086 v1 feature only !	
  1299 0000D112 5B                  <1>   	pop	ebx  ; **
  1300                              <1> 	;mov	ebx, [esp] ; ** parent process number
  1301                              <1> 		; movb (sp),r2 / put parent process number in r2
  1302                              <1> 	; 23/07/2022
  1303 0000D113 D1E3                <1> 	shl	ebx, 1
  1304                              <1> 	;shl 	bx, 1
  1305                              <1> 		;asl r2 / multiply by 2 to get index into below tables
  1306                              <1> 	;movzx eax, word [ebx+p.pid-2]
  1307 0000D115 668B83[FEFF0200]    <1> 	mov	ax, [ebx+p.pid-2]
  1308                              <1> 		; mov p.pid-2(r2),r2 / get process name of parent
  1309                              <1> 				   ; / process
  1310 0000D11C 668986[1E000300]    <1> 	mov	[esi+p.ppid-2], ax
  1311                              <1> 		; mov r2,p.ppid-2(r1) / put parent process name 
  1312                              <1> 			  ; / in parent process slot for child
  1313 0000D123 A3[1C010300]        <1> 	mov	[u.r0], eax	
  1314                              <1> 		; mov r2,*u.r0 / put parent process name on stack 
  1315                              <1> 			     ; / at location where r0 was saved
  1316 0000D128 8B2D[14010300]      <1> 	mov 	ebp, [u.sp] ; points to return address (EIP for IRET)
  1317 0000D12E 895500              <1> 	mov	[ebp], edx ; *, CS:EIP -> EIP
  1318                              <1> 			   ; * return address for the child process
  1319                              <1> 		; mov $sysret1,-(sp) /
  1320                              <1> 		; mov sp,u.usp / contents of sp at the time when 
  1321                              <1> 			      ; / user is swapped out
  1322                              <1> 		; mov $sstack,sp / point sp to swapping stack space
  1323                              <1> 	; 04/09/2015 - 01/09/2015
  1324                              <1> 	; [u.usp] = esp
  1325 0000D131 68[6FCD0000]        <1> 	push	sysret ; ***
  1326 0000D136 8925[18010300]      <1> 	mov	[u.usp], esp ; points to 'sysret' address (***)
  1327                              <1> 			     ; (for child process)	
  1328 0000D13C 31C0                <1> 	xor 	eax, eax
  1329 0000D13E 66A3[50010300]      <1> 	mov 	[u.ttyp], ax ; 0
  1330                              <1> 	;
  1331 0000D144 E81C3B0000          <1> 	call	wswap ; Retro UNIX 8086 v1 modification !
  1332                              <1> 		; jsr r0,wswap / put child process out on drum
  1333                              <1> 		; jsr r0,unpack / unpack user stack
  1334                              <1> 		; mov u.usp,sp / restore user stack pointer
  1335                              <1> 		; tst (sp)+ / bump stack pointer
  1336                              <1> 	; Retro UNIX 386 v1 modification !
  1337 0000D149 58                  <1> 	pop	eax ; ***
  1338                              <1> 	;shl	bx, 1
  1339                              <1> 	; 23/07/2022
  1340 0000D14A D1E3                <1> 	shl	ebx, 1
  1341 0000D14C 8B83[6C000300]      <1> 	mov     eax, [ebx+p.upage-4] ; UPAGE address ; 14/05/2015
  1342 0000D152 E8463B0000          <1> 	call	rswap ; restore parent process 'u' structure, 
  1343                              <1> 		      ; registers and return address (for IRET)
  1344                              <1> 		;movb (sp)+,u.uno / put parent process number in u.uno
  1345 0000D157 0FB705[04010300]    <1>         movzx   eax, word [mpid]
  1346 0000D15E A3[1C010300]        <1> 	mov	[u.r0], eax
  1347                              <1> 		; mov mpid,*u.r0 / put child process name on stack 
  1348                              <1> 			       ; / where r0 was saved
  1349                              <1> 		; add $2,18.(sp) / add 2 to pc on stack; gives parent
  1350                              <1> 			          ; / process return
  1351                              <1> 	;xor	ebx, ebx
  1352 0000D163 31F6                <1> 	xor     esi, esi
  1353                              <1> 		;clr r1
  1354                              <1> sysfork_4: ; 1: / search u.fp list to find the files 
  1355                              <1> 	      ; / opened by the parent process
  1356                              <1> 	; 01/09/2015
  1357                              <1> 	;xor	bh, bh
  1358                              <1> 	;mov 	bl, [esi+u.fp]
  1359 0000D165 8A86[26010300]      <1> 	mov 	al, [esi+u.fp]
  1360                              <1> 		; movb u.fp(r1),r2 / get an open file for this process
  1361                              <1>         ;or	bl, bl
  1362 0000D16B 08C0                <1> 	or	al, al
  1363 0000D16D 7406                <1> 	jz	short sysfork_5	
  1364                              <1> 		; beq 2f / file has not been opened by parent, 
  1365                              <1> 		       ; / so branch
  1366                              <1> 	;mov	ah, 10 ; Retro UNIX 386 v1 fsp structure size = 10 bytes
  1367                              <1> 	;mul	ah
  1368                              <1> 	; 23/07/2022
  1369                              <1> 	; Retro UNIX 386 v2 & TRDOS 386 v2.0.5 fsp struc size = 16 bytes
  1370                              <1> 	;mov	ebx, eax 	
  1371                              <1> 	;shl	ebx, 4 ; * 16
  1372                              <1> 	;inc	byte [ebx+fsp-10]
  1373                              <1> 
  1374                              <1> 	; 23/07/2022 (BugFix)
  1375 0000D16F FE80[E4840100]      <1> 	inc	byte [OF_OPENCOUNT+eax] 
  1376                              <1> 
  1377                              <1> 	;;movzx	ebx, ax
  1378                              <1> 	;mov	bx, ax
  1379                              <1> 	;shl	bx, 3
  1380                              <1> 		; asl r2 / multiply by 8
  1381                              <1>        		; asl r2 / to get index into fsp table
  1382                              <1>        		; asl r2
  1383                              <1>   	;inc	byte [ebx+fsp-2]
  1384                              <1> 		; incb fsp-2(r2) / increment number of processes
  1385                              <1> 			     ; / using file, because child will now be
  1386                              <1> 			     ; / using this file
  1387                              <1> sysfork_5: ; 2:
  1388 0000D175 46                  <1>         inc     esi
  1389                              <1> 		; inc r1 / get next open file
  1390                              <1> 	; 23/07/2022
  1391 0000D176 6683FE20            <1> 	cmp	si, OPENFILES ; = 10
  1392                              <1> 	;cmp	si, 10
  1393                              <1> 		; cmp r1,$10. / 10. files is the maximum number which
  1394                              <1> 			    ; / can be opened
  1395 0000D17A 72E9                <1> 	jb	short sysfork_4	
  1396                              <1> 		; blt 1b / check next entry
  1397 0000D17C E9EEFBFFFF          <1> 	jmp	sysret
  1398                              <1> 		; br sysret1
  1399                              <1> 
  1400                              <1> syscreat: ; < create file >
  1401                              <1> 	; 08/08/2022
  1402                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
  1403                              <1> 	; 13/11/2017
  1404                              <1> 	; 27/10/2016
  1405                              <1> 	; 25/10/2016 - 26/10/2016
  1406                              <1> 	; 15/10/2016 - 16/10/2016 - 17/10/2016
  1407                              <1> 	; 10/10/2016 (TRDOS 386 = TRDOS v2.0) 
  1408                              <1> 	;	     -derived from INT_21H.ASM-
  1409                              <1> 	;            ("loc_INT21h_create_file")
  1410                              <1>         ; 	10/07/2011 (12/03/2011)
  1411                              <1>         ;	INT 21h Function AH = 3Ch
  1412                              <1>         ;	Create File
  1413                              <1>         ;	INPUT
  1414                              <1>         ;	   CX = Attributes
  1415                              <1>         ;          DS:DX= Address of zero terminaned path name
  1416                              <1>         ;
  1417                              <1> 	; 27/12/2015 (Retro UNIX 386 v1.1)
  1418                              <1> 	; 14/05/2015 (Retro UNIX 386 v1 - Beginning)
  1419                              <1> 	; 27/05/2013 (Retro UNIX 8086 v1)
  1420                              <1> 	;
  1421                              <1> 	; 'syscreat' called with two arguments; name and mode.
  1422                              <1> 	; u.namep points to name of the file and mode is put
  1423                              <1> 	; on the stack. 'namei' is called to get i-number of the file.		
  1424                              <1> 	; If the file aready exists, it's mode and owner remain 
  1425                              <1> 	; unchanged, but it is truncated to zero length. If the file
  1426                              <1> 	; did not exist, an i-node is created with the new mode via
  1427                              <1> 	; 'maknod' whether or not the file already existed, it is
  1428                              <1> 	; open for writing. The fsp table is then searched for a free
  1429                              <1> 	; entry. When a free entry is found, proper data is placed
  1430                              <1> 	; in it and the number of this entry is put in the u.fp list.
  1431                              <1> 	; The index to the u.fp (also know as the file descriptor)
  1432                              <1> 	; is put in the user's r0. 			
  1433                              <1> 	;
  1434                              <1> 	; Calling sequence:
  1435                              <1> 	;	syscreate; name; mode
  1436                              <1> 	; Arguments:
  1437                              <1> 	;	name - name of the file to be created
  1438                              <1> 	;	mode - mode of the file to be created
  1439                              <1> 	; Inputs: (arguments)
  1440                              <1> 	; Outputs: *u.r0 - index to u.fp list 
  1441                              <1> 	;		   (the file descriptor of new file)
  1442                              <1> 	; ...............................................................
  1443                              <1> 	;				
  1444                              <1> 	; Retro UNIX 8086 v1 modification: 
  1445                              <1> 	;       'syscreate' system call has two arguments; so,
  1446                              <1> 	;	* 1st argument, name is pointed to by BX register
  1447                              <1> 	;	* 2nd argument, mode is in CX register
  1448                              <1> 	;
  1449                              <1> 	;	AX register (will be restored via 'u.r0') will return
  1450                              <1> 	;	to the user with the file descriptor/number 
  1451                              <1> 	;	(index to u.fp list).
  1452                              <1> 	;
  1453                              <1> 	;call	arg2
  1454                              <1> 	; * name - 'u.namep' points to address of file/path name
  1455                              <1> 	;          in the user's program segment ('u.segmnt')
  1456                              <1> 	;          with offset in BX register (as sysopen argument 1).
  1457                              <1> 	; * mode - sysopen argument 2 is in CX register 
  1458                              <1> 	;          which is on top of stack.
  1459                              <1> 	;
  1460                              <1> 	; TRDOS 386 (10/10/2016)
  1461                              <1> 	;	
  1462                              <1>         ; INPUT ->
  1463                              <1>         ;	   CL = File Attributes
  1464                              <1> 	;     	      bit 0 (1) - Read only file (R)
  1465                              <1> 	;             bit 1 (1) - Hidden file (H)
  1466                              <1>         ;             bit 2 (1) - System file (R)
  1467                              <1> 	;             bit 3 (1) - Volume label/name (V)
  1468                              <1>         ;             bit 4 (1) - Subdirectory (D)
  1469                              <1> 	;	      bit 5 (1) - File has been archived (A)	 	
  1470                              <1>         ;          EBX = Pointer to filename (ASCIIZ) -path-
  1471                              <1> 	;	
  1472                              <1> 	; OUTPUT ->
  1473                              <1> 	;          eax = File/Device Handle/Number (index) (AL)
  1474                              <1> 	;          cf = 1 -> Error code in AL
  1475                              <1> 	;
  1476                              <1> 	; Modified Registers: EAX (at the return of system call)
  1477                              <1> 	;  
  1478                              <1> 	; Note: If the file is existing and it has not any one
  1479                              <1> 	;	of S,H,R,V,D attributes, it will be truncated 
  1480                              <1> 	;	to zero length; otherwise, access error will be 
  1481                              <1> 	;	returned. 
  1482                              <1> 
  1483                              <1> sysmkdir_0:
  1484 0000D181 F6C108              <1> 	test	cl, 08h ; Volume name 
  1485 0000D184 740A                <1> 	jz	short syscreat_0
  1486                              <1> 
  1487                              <1> 	; Volume name or long name creation
  1488                              <1> 	; is not permitted (in TRDOS 386)!
  1489 0000D186 B80B000000          <1> 	mov	eax, ERR_FILE_ACCESS  ; 11 ; 'permission denied !'
  1490 0000D18B E9CE000000          <1>         jmp	sysopen_dev_err ; 08/08/2022
  1491                              <1> syscreat_0:
  1492                              <1>         ;mov	[u.namep], ebx
  1493 0000D190 51                  <1> 	push	ecx
  1494 0000D191 89DE                <1> 	mov	esi, ebx
  1495                              <1> 	; file name is forced, change directory as temporary
  1496                              <1> 	;mov	ax, 1
  1497                              <1> 	;mov	[FFF_Valid], ah ; 0 ; reset ; 17/10/2016
  1498                              <1> 	;call	set_working_path 
  1499 0000D193 E8D54E0000          <1> 	call	set_working_path_x ; 17/10/2016	
  1500                              <1> 	;jc	short syscreat_err
  1501                              <1> 	; 23/07/2022
  1502 0000D198 7305                <1> 	jnc	short syscreat_3
  1503 0000D19A E9D8000000          <1> 	jmp	syscreat_err
  1504                              <1> 
  1505                              <1> syscreat_3:
  1506                              <1> 	; 16/10/2016
  1507 0000D19F 803D[FB830100]00    <1> 	cmp	byte [SWP_inv_fname], 0
  1508 0000D1A6 776C                <1> 	ja	short  syscreat_inv_fname ; invalid file name !
  1509                              <1> 
  1510                              <1> 	; Here, we have a valid path and also a valid file name
  1511                              <1> 	; (Working dir has been changed if the path
  1512                              <1> 	;  -file name string- had contained a dir name.)
  1513                              <1> 
  1514 0000D1A8 6631C0              <1> 	xor	ax, ax 
  1515                              <1> 	;mov	esi, FindFile_Name
  1516 0000D1AB E8E0B8FFFF          <1> 	call	find_first_file
  1517 0000D1B0 59                  <1> 	pop	ecx
  1518                              <1> 		; ESI = Directory Entry (FindFile_DirEntry) Location
  1519                              <1> 		; EDI = Directory Buffer Directory Entry Location
  1520                              <1> 		; EAX = File Size
  1521                              <1> 		;  BL = Attributes of The File/Directory
  1522                              <1> 		;  BH = Long Name Yes/No Status (>0 is YES)
  1523                              <1> 		;  DX > 0 : Ambiguous filename chars are used
  1524 0000D1B1 7269                <1> 	jc	short syscreat_1 ; file not found (the good!) 
  1525                              <1> 				 ; or another error (the bad!) 
  1526                              <1> 
  1527                              <1> 	; (& the uggly!) truncate file to zero length before open
  1528                              <1> 
  1529                              <1> 	;'*' and '?' already checked at 'set_working_path' stage
  1530                              <1> 	;and	dx, dx
  1531                              <1> 	;jnz	short sysmkdir_err ; permission denied 
  1532                              <1> 				   ; invalid filename chars
  1533                              <1> 
  1534                              <1> 	;test	cl, 10h ; subdirectory ?
  1535                              <1> 	;jnz	short sysmkdir_err	
  1536                              <1> 
  1537                              <1> 	; BL = File Attributes:	
  1538                              <1> 	;     	      bit 0 (1) - Read only file (R)
  1539                              <1> 	;             bit 1 (1) - Hidden file (H)
  1540                              <1>         ;             bit 2 (1) - System file (R)
  1541                              <1> 	;             bit 3 (1) - Volume label/name (V)
  1542                              <1>         ;             bit 4 (1) - Subdirectory (D)
  1543                              <1> 	;	      bit 5 (1) - File has been archived	 	
  1544                              <1> 
  1545                              <1> 	; * existing directory must not be truncated
  1546                              <1> 	;   (we don't know it is empty or not, at this stage) 
  1547                              <1> 	; * existing volume name (or a long name) can not be
  1548                              <1> 	;   re-created or truncated by 'syscreat' 	
  1549                              <1> 	; * A file with S, H, R attributes must not be truncated
  1550                              <1> 	;   (change attributes to normal, if you need truncate it)
  1551                              <1> 
  1552 0000D1B3 F6C31F              <1> 	test	bl, 00011111b  ; check attributes of existing file
  1553 0000D1B6 754E                <1> 	jnz	short sysmkdir_err
  1554                              <1> 
  1555                              <1> 	;; normal file, OK to continue...
  1556                              <1> 
  1557                              <1> 	; ESI = FindFile_DirEntry
  1558 0000D1B8 668B4614            <1> 	mov	ax, [esi+DirEntry_FstClusHI] ; 20
  1559 0000D1BC C1E010              <1> 	shl	eax, 16 ; 13/11/2017
  1560 0000D1BF 668B461A            <1> 	mov	ax, [esi+DirEntry_FstClusLO] ; 26 
  1561                              <1> 	; EAX = First cluster to be truncated/unlinked
  1562 0000D1C3 57                  <1> 	push	edi
  1563 0000D1C4 51                  <1> 	push	ecx
  1564 0000D1C5 BE00010900          <1> 	mov	esi, Logical_DOSDisks
  1565 0000D1CA 29C9                <1> 	sub	ecx, ecx
  1566 0000D1CC 8A2D[0A780100]      <1> 	mov	ch, [Current_Drv]
  1567 0000D1D2 01CE                <1> 	add	esi, ecx
  1568                              <1> 	; ESI = Logical dos drive description table address
  1569 0000D1D4 E8DEF7FFFF          <1> 	call	truncate_cluster_chain
  1570 0000D1D9 59                  <1> 	pop	ecx
  1571 0000D1DA 5F                  <1> 	pop	edi
  1572 0000D1DB 7230                <1> 	jc	short syscreate_truncate_err
  1573                              <1> 
  1574                              <1> 	; 26/10/2016
  1575                              <1> 	; EDI = Directory entry address in directory buffer
  1576                              <1> 	; Update directory entry
  1577 0000D1DD E819DDFFFF          <1> 	call	convert_current_date_time
  1578                              <1> 	; OUTPUT -> DX = Date in dos dir entry format
  1579                              <1>         ; 	    AX = Time in dos dir entry format	
  1580 0000D1E2 66894716            <1> 	mov	[edi+DirEntry_WrtTime], ax
  1581 0000D1E6 66895718            <1> 	mov	[edi+DirEntry_WrtDate], dx	
  1582 0000D1EA 66895712            <1> 	mov	[edi+DirEntry_LastAccDate], dx
  1583 0000D1EE 31C0                <1> 	xor	eax, eax ; file size = 0 
  1584 0000D1F0 89471C              <1> 	mov	[edi+DirEntry_FileSize], eax ; 0
  1585 0000D1F3 C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2 ; data changed sign	
  1586 0000D1FA BE[FC800100]        <1> 	mov	esi, FindFile_DirEntry
  1587 0000D1FF B201                <1> 	mov	dl, 1 ; open file for writing
  1588 0000D201 E9AB000000          <1> 	jmp	sysopen_2 ; 08/08/2022
  1589                              <1> 
  1590                              <1> sysmkdir_err:
  1591                              <1> 	; 1 = write, 2 = read & write, >2 = invalid
  1592 0000D206 B80B000000          <1>         mov	eax, ERR_FILE_ACCESS  ; 11 ; 'permission denied !'
  1593 0000D20B EB74                <1>         jmp	short sysopen_err
  1594                              <1> 
  1595                              <1> syscreate_truncate_err:
  1596 0000D20D B812000000          <1> 	mov	eax, ERR_DRV_WRITE ; 18 ; 'disk write error !'
  1597 0000D212 EB6D                <1>         jmp	short sysopen_err
  1598                              <1> 
  1599                              <1> syscreat_inv_fname:  ; invalid file name chars 
  1600                              <1> 	; 16/10/2016
  1601 0000D214 B81A000000          <1> 	mov	eax, ERR_INV_FILE_NAME  ; 26 ; invalid file name chars 
  1602 0000D219 59                  <1> 	pop	ecx
  1603 0000D21A EB65                <1> 	jmp	short sysopen_err
  1604                              <1> 
  1605                              <1> syscreat_1:
  1606                              <1> 	; Error code in EAX
  1607 0000D21C 3C02                <1>         cmp	al, 02h ; 'File not found' error
  1608 0000D21E 7561                <1>         jne	short sysopen_err
  1609                              <1> 
  1610 0000D220 F6C110              <1> 	test	cl, 10h ; Directory
  1611                              <1> 	;jnz	sysmkdir_2
  1612                              <1> 	; 23/07/2022
  1613 0000D223 7405                <1> 	jz	short syscreat_2
  1614 0000D225 E992010000          <1> 	jmp	sysmkdir_2
  1615                              <1> 
  1616                              <1> syscreat_2:
  1617 0000D22A BE[EC800100]        <1> 	mov	esi, FindFile_Name 
  1618                              <1>         ;xor	edx, edx
  1619 0000D22F 31C0                <1>         xor	eax, eax ; File Size  = 0
  1620 0000D231 31DB                <1> 	xor	ebx, ebx
  1621 0000D233 4B                  <1> 	dec 	ebx ; FFFFFFFFh -> create empty file 
  1622                              <1> 	            ;              (only for FAT fs) 
  1623                              <1> 	; CL = File Attributes
  1624 0000D234 E897ECFFFF          <1> 	call	create_file
  1625 0000D239 7246                <1> 	jc	short sysopen_err
  1626                              <1> 		; EAX = New file's first cluster
  1627                              <1> 		; ESI = Logical Dos Drv Descr. Table Addr.
  1628                              <1> 		; EBX = offset CreateFile_Size
  1629                              <1> 		; ECX = Sectors per cluster (<256) 
  1630                              <1> 		; EDX = Directory entry index/number (<65536)
  1631                              <1> 	; 26/10/2016
  1632                              <1> 	;mov	esi, Directory_Buffer
  1633                              <1> 	;shl	dx, 5 ; *32
  1634                              <1> 	;add	esi, edx
  1635                              <1> 	;; esi = directory entry address in directory buffer
  1636                              <1> 
  1637                              <1> 	; Here, directory entry has been created but last
  1638                              <1> 	; modification date & time of the parent dir has not
  1639                              <1> 	; been updated, yet! 
  1640                              <1> 	; (Note: Directory and FAT buffers have been updated...)
  1641                              <1>  	
  1642 0000D23B E8E8DDFFFF          <1> 	call	update_parent_dir_lmdt ; now, it is OK too!
  1643                              <1> 
  1644                              <1> 	; 25/10/2016
  1645 0000D240 66B80018            <1> 	mov	ax, 1800h
  1646 0000D244 BE[EC800100]        <1> 	mov	esi, FindFile_Name
  1647 0000D249 E842B8FFFF          <1> 	call	find_first_file
  1648 0000D24E 7231                <1> 	jc	short sysopen_err
  1649                              <1> 
  1650                              <1> 	; Only possible error after here is 
  1651                              <1> 	; "too many open files !" error.
  1652                              <1> 	;
  1653                              <1> 	; If "syscreat" will return with that error,
  1654                              <1> 	; (the file has been created but it could not be opened)
  1655                              <1> 	; the user must retry to open this file again
  1656                              <1> 	; or must close another file before using 
  1657                              <1> 	; "sysopen" system call.
  1658                              <1> 
  1659 0000D250 B201                <1> 	mov	dl, 1 ; open file for writing
  1660                              <1> 	; ESI = Directory Entry (FindFile_DirEntry) Location
  1661                              <1> 	; EAX = File Size (= 0)
  1662 0000D252 EB5D                <1> 	jmp	short sysopen_2
  1663                              <1> 
  1664                              <1> sysopen: ;<open file>
  1665                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
  1666                              <1> 	; 17/04/2021 - TRDOS 386 v2.0.4
  1667                              <1> 	;	(temporary modifications)
  1668                              <1> 	; 26/10/2016
  1669                              <1> 	; 24/10/2016
  1670                              <1> 	; 17/10/2016
  1671                              <1> 	; 15/10/2016
  1672                              <1> 	; 06/10/2016, 07/10/2016, 08/10/2016
  1673                              <1> 	; 05/10/2016 (TRDOS 386 = TRDOS v2.0) 
  1674                              <1> 	;	     -derived from INT_21H.ASM-
  1675                              <1> 	;            ("loc_INT21h_open_file")
  1676                              <1>         ; 	26/02/2011 
  1677                              <1>         ;	INT 21h Function AH = 3Dh
  1678                              <1>         ;	Open File
  1679                              <1>         ;	INPUT
  1680                              <1>         ;	   AL= File Access Value
  1681                              <1> 	;     	     0- Open for reading
  1682                              <1> 	;            1- Open for writing
  1683                              <1>         ;            2- Open for reading and writing
  1684                              <1>         ;          DS:DX= Pointer to filename (ASCIIZ)
  1685                              <1>         ;
  1686                              <1> 	; 14/05/2015 (Retro UNIX 386 v1 - Beginning)
  1687                              <1> 	; 22/05/2013 - 27/05/2013 (Retro UNIX 8086 v1)
  1688                              <1> 	;
  1689                              <1> 	; 'sysopen' opens a file in following manner:
  1690                              <1> 	;    1) The second argument in a sysopen says whether to
  1691                              <1> 	;	open the file ro read (0) or write (>0).
  1692                              <1> 	;    2) I-node of the particular file is obtained via 'namei'.
  1693                              <1> 	;    3) The file is opened by 'iopen'.
  1694                              <1> 	;    4) Next housekeeping is performed on the fsp table
  1695                              <1> 	;	and the user's open file list - u.fp.
  1696                              <1> 	;	a) u.fp and fsp are scanned for the next available slot.
  1697                              <1> 	;	b) An entry for the file is created in the fsp table.
  1698                              <1> 	;	c) The number of this entry is put on u.fp list.
  1699                              <1> 	;	d) The file descriptor index to u.fp list is pointed
  1700                              <1> 	;	   to by u.r0.
  1701                              <1> 	;
  1702                              <1> 	; Calling sequence:
  1703                              <1> 	;	sysopen; name; mode
  1704                              <1> 	; Arguments:
  1705                              <1> 	;	name - file name or path name
  1706                              <1> 	;	mode - 0 to open for reading
  1707                              <1> 	;	       1 to open for writing
  1708                              <1> 	; Inputs: (arguments)
  1709                              <1> 	; Outputs: *u.r0 - index to u.fp list (the file descriptor)
  1710                              <1> 	;		  is put into r0's location on the stack.	
  1711                              <1> 	; ...............................................................
  1712                              <1> 	;				
  1713                              <1> 	; Retro UNIX 8086 v1 modification: 
  1714                              <1> 	;       'sysopen' system call has two arguments; so,
  1715                              <1> 	;	* 1st argument, name is pointed to by BX register
  1716                              <1> 	;	* 2nd argument, mode is in CX register
  1717                              <1> 	;
  1718                              <1> 	;	AX register (will be restored via 'u.r0') will return
  1719                              <1> 	;	to the user with the file descriptor/number 
  1720                              <1> 	;	(index to u.fp list).
  1721                              <1> 	;
  1722                              <1> 	;call	arg2
  1723                              <1> 	; * name - 'u.namep' points to address of file/path name
  1724                              <1> 	;          in the user's program segment ('u.segmnt')
  1725                              <1> 	;          with offset in BX register (as sysopen argument 1).
  1726                              <1> 	; * mode - sysopen argument 2 is in CX register 
  1727                              <1> 	;          which is on top of stack.
  1728                              <1> 	;
  1729                              <1> 	; jsr r0,arg2 / get sys args into u.namep and on stack
  1730                              <1> 	;
  1731                              <1>        	; system call registers: ebx, ecx (through 'sysenter')
  1732                              <1> 	;
  1733                              <1> 	; TRDOS 386 (05/10/2016)
  1734                              <1> 	;	
  1735                              <1>         ; INPUT ->
  1736                              <1>         ;	   CL = File Access Value (Open Mode)
  1737                              <1> 	;     	      0 - Open file for reading
  1738                              <1> 	;             1 - Open file for writing
  1739                              <1>         ;             2 - Open device for reading
  1740                              <1> 	;	      3 - Open device for writing
  1741                              <1>         ;          EBX = Pointer to filename/devicename (ASCIIZ)
  1742                              <1> 	; OUTPUT ->
  1743                              <1> 	;          eax = File/Device Handle/Number (index) (AL)
  1744                              <1> 	;          cf = 1 -> Error code in AL
  1745                              <1> 	;
  1746                              <1> 	; Modified Registers: EAX (at the return of system call)
  1747                              <1> 	;  
  1748                              <1> 
  1749 0000D254 80F901              <1> 	cmp	cl, 1 ; read file (0), write file (1)
  1750 0000D257 7614                <1> 	jna	short sysopen_0
  1751                              <1> 
  1752                              <1> 	; 17/04/2021 (temporary)
  1753                              <1> 	;cmp	cl, 3
  1754                              <1> 	;jna	sysopen_device
  1755                              <1> 
  1756                              <1> 	; Invalid access code
  1757 0000D259 B817000000          <1> 	mov	eax, ERR_INV_PARAMETER
  1758                              <1> 	;jmp	sysopen_dev_err
  1759                              <1> 
  1760                              <1> sysopen_dev_err:
  1761 0000D25E A3[1C010300]        <1> 	mov	[u.r0], eax
  1762 0000D263 A3[84010300]        <1> 	mov	[u.error], eax
  1763 0000D268 E9E2FAFFFF          <1> 	jmp	error
  1764                              <1> 
  1765                              <1> sysopen_0:
  1766                              <1> 	;mov	[u.namep], ebx
  1767 0000D26D 51                  <1> 	push	ecx
  1768 0000D26E 89DE                <1> 	mov	esi, ebx
  1769                              <1> 	; file name is forced, change directory as temporary
  1770                              <1> 	;mov	ax, 1
  1771                              <1> 	;mov	[FFF_Valid], ah ; 0 ; reset ; 17/10/2016
  1772                              <1> 	;call	set_working_path 
  1773 0000D270 E8F84D0000          <1> 	call	set_working_path_x ; 17/10/2016	
  1774 0000D275 731E                <1> 	jnc	short sysopen_1
  1775                              <1> 
  1776                              <1> syscreat_err: ; ecx = file attributes (for 'syscreat')
  1777 0000D277 59                  <1> 	pop	ecx ; open mode  
  1778 0000D278 21C0                <1> 	and	eax, eax  ; 0 -> Bad Path!  
  1779 0000D27A 7505                <1> 	jnz	short sysopen_err
  1780                              <1> 	; eax = 0
  1781 0000D27C B80C000000          <1> 	mov	eax, ERR_DIR_NOT_FOUND ; Directory not found !
  1782                              <1> sysopen_err:
  1783 0000D281 A3[1C010300]        <1> 	mov	[u.r0], eax
  1784 0000D286 A3[84010300]        <1> 	mov	[u.error], eax
  1785 0000D28B E8B24E0000          <1> 	call 	reset_working_path
  1786 0000D290 E9BAFAFFFF          <1> 	jmp	error
  1787                              <1> 
  1788                              <1> sysopen_1:
  1789                              <1> 	;mov	esi, FindFile_Name
  1790 0000D295 66B80018            <1>         mov	ax, 1800h ; Only files 
  1791 0000D299 E8F2B7FFFF          <1> 	call	find_first_file
  1792 0000D29E 5A                  <1> 	pop	edx
  1793 0000D29F 72E0                <1> 	jc	short sysopen_err ; eax = 2 (File not found !)
  1794                              <1> 
  1795                              <1> 	; check_open_file_attr_access_code
  1796                              <1> 
  1797 0000D2A1 F6C307              <1>         test	bl, 7  ; system, hidden, readonly 
  1798 0000D2A4 740B                <1>         jz	short sysopen_2
  1799                              <1> 
  1800 0000D2A6 20D2                <1> 	and	dl, dl ; 0 = read mode
  1801 0000D2A8 7407                <1> 	jz	short sysopen_2
  1802                              <1> 
  1803                              <1> 	; 1 = write, 2 = read & write, >2 = invalid
  1804 0000D2AA B80B000000          <1>         mov	eax, ERR_FILE_ACCESS ; 11 = 'permission denied !'
  1805 0000D2AF EBD0                <1>         jmp	short sysopen_err
  1806                              <1> 
  1807                              <1> sysopen_2:
  1808                              <1> 	; esi = Directory Entry (FindFile_DirEntry) Location
  1809 0000D2B1 89F3                <1> 	mov	ebx, esi
  1810 0000D2B3 31F6                <1>         xor     esi, esi ; 0
  1811 0000D2B5 31FF                <1>         xor     edi, edi ; 0
  1812                              <1> sysopen_3: ; scan the list of entries in fsp table
  1813 0000D2B7 80BE[26010300]00    <1>         cmp     byte [esi+u.fp], 0
  1814 0000D2BE 760F                <1>         jna     short sysopen_4 ; empty slot
  1815 0000D2C0 6646                <1>         inc     si
  1816 0000D2C2 6683FE0A            <1>         cmp     si, 10
  1817 0000D2C6 72EF                <1> 	jb	short sysopen_3
  1818                              <1> toomanyf:
  1819 0000D2C8 B80D000000          <1> 	mov	eax, ERR_TOO_MANY_FILES ; too many open files !
  1820 0000D2CD EBB2                <1> 	jmp	short sysopen_err
  1821                              <1> 
  1822                              <1> sysopen_4: 
  1823 0000D2CF 80BF[A4840100]00    <1>         cmp     byte [edi+OF_MODE], 0 ; Scan open files table 
  1824 0000D2D6 760A                <1> 	jna     short sysopen_5
  1825 0000D2D8 6647                <1> 	inc	di
  1826 0000D2DA 6683FF20            <1> 	cmp     di, OPENFILES ; max. number of open files (sytem)
  1827 0000D2DE 72EF                <1> 	jb	short sysopen_4
  1828 0000D2E0 EBE6                <1> 	jmp	short toomanyf
  1829                              <1> 
  1830                              <1> sysopen_5:
  1831 0000D2E2 FEC2                <1> 	inc	dl
  1832 0000D2E4 8897[A4840100]      <1>         mov     [edi+OF_MODE], dl
  1833 0000D2EA 8A15[AA800100]      <1> 	mov	dl, [FindFile_Drv]
  1834 0000D2F0 8897[84840100]      <1>         mov     [edi+OF_DRIVE], dl ; Logical DOS drive number
  1835                              <1> 	;shl	di, 2 ; *4 (dword offset)
  1836                              <1> 	; 23/07/2022
  1837 0000D2F6 C1E702              <1> 	shl	edi, 2
  1838                              <1> 
  1839 0000D2F9 8987[84850100]      <1> 	mov	[edi+OF_SIZE], eax ; File size in bytes
  1840                              <1> 
  1841 0000D2FF 668B4314            <1>         mov 	ax, [ebx+DirEntry_FstClusHI]
  1842 0000D303 C1E010              <1> 	shl	eax, 16
  1843 0000D306 668B431A            <1> 	mov 	ax, [ebx+DirEntry_FstClusLO]
  1844 0000D30A 8987[04840100]      <1> 	mov     [edi+OF_FCLUSTER], eax ; First cluster
  1845 0000D310 8987[84870100]      <1> 	mov     [edi+OF_CCLUSTER], eax ; Current cluster
  1846                              <1> 
  1847 0000D316 31DB                <1>         xor	ebx, ebx
  1848 0000D318 899F[04850100]      <1>         mov     [edi+OF_POINTER], ebx ; offset pointer (0)
  1849 0000D31E 899F[04880100]      <1>         mov     [edi+OF_CCINDEX], ebx ; cluster index (0)
  1850                              <1> 
  1851 0000D324 A1[1C810100]        <1> 	mov	eax, [FindFile_DirFirstCluster]
  1852 0000D329 8987[04860100]      <1> 	mov	[edi+OF_DIRFCLUSTER], eax
  1853                              <1> 
  1854 0000D32F A1[20810100]        <1> 	mov	eax, [FindFile_DirCluster]
  1855 0000D334 8987[84860100]      <1> 	mov	[edi+OF_DIRCLUSTER], eax
  1856                              <1> 
  1857                              <1> 	; Get (& Save) Volume ID 
  1858                              <1> 	; Important for files of removable drives
  1859                              <1> 	; (In order to check the drive has same volume/disk)
  1860 0000D33A 88D7                <1> 	mov	bh, dl
  1861 0000D33C 81C300010900        <1>         add	ebx, Logical_DOSDisks
  1862 0000D342 8A4303              <1>         mov	al, [ebx+LD_FATType]
  1863 0000D345 3C01                <1>         cmp	al, 1
  1864 0000D347 7209                <1>         jb	short sysopen_6_fs
  1865 0000D349 3C02                <1>         cmp	al, 2
  1866 0000D34B 770A                <1>         ja	short sysopen_6_fat32
  1867                              <1> sysopen_6_fat:
  1868 0000D34D 8B432D              <1>         mov	eax, [ebx+LD_BPB+VolumeID]
  1869 0000D350 EB08                <1>         jmp	short sysopen_7
  1870                              <1> sysopen_6_fs:
  1871 0000D352 8B4328              <1>         mov	eax, [ebx+LD_FS_VolumeSerial]
  1872 0000D355 EB03                <1>         jmp	short sysopen_7
  1873                              <1> sysopen_6_fat32:
  1874 0000D357 8B4349              <1>         mov	eax, [ebx+LD_BPB+FAT32_VolID]
  1875                              <1> sysopen_7:
  1876 0000D35A A3[00780100]        <1>         mov	[Current_VolSerial], eax
  1877                              <1> 
  1878 0000D35F 8987[04870100]      <1> 	mov	[edi+OF_VOLUMEID], eax
  1879                              <1> 
  1880                              <1> 	; 24/10/2016
  1881                              <1> 	;shr	di, 1 ; 4/2, word offset
  1882                              <1> 	; 23/07/2022
  1883 0000D365 D1EF                <1> 	shr	edi, 1
  1884 0000D367 668B1D[24810100]    <1> 	mov	bx, [FindFile_DirEntryNumber]
  1885 0000D36E 66899F[84880100]    <1> 	mov	[edi+OF_DIRENTRY], bx
  1886                              <1> 
  1887 0000D375 31D2                <1> 	xor	edx, edx
  1888                              <1> 	;;shr	di, 2 ; /4 (byte offset)
  1889                              <1> 	;shr	di, 1 ; 2/2, byte offset
  1890                              <1> 	; 23/07/2022
  1891 0000D377 D1EF                <1> 	shr	edi, 1
  1892 0000D379 8897[E4840100]      <1> 	mov	byte [edi+OF_OPENCOUNT], dl ; 0
  1893 0000D37F 8897[C4840100]      <1> 	mov	byte [edi+OF_STATUS], dl ; 0
  1894                              <1> 
  1895 0000D385 89FB                <1> 	mov	ebx, edi
  1896 0000D387 FEC3                <1> 	inc	bl
  1897                              <1> 
  1898 0000D389 889E[26010300]      <1>         mov     [esi+u.fp], bl ; Open File Entry Number
  1899 0000D38F 8935[1C010300]      <1> 	mov     [u.r0], esi ; move index to u.fp list 
  1900                              <1> 			    ; into eax on stack
  1901                              <1> 
  1902 0000D395 E8A84D0000          <1>         call 	reset_working_path
  1903                              <1>         
  1904 0000D39A E9D0F9FFFF          <1> 	jmp	sysret
  1905                              <1> 
  1906                              <1> 
  1907                              <1> ; fsp table (original UNIX v1)
  1908                              <1> ;
  1909                              <1> ;Entry
  1910                              <1> ;          15                                      0
  1911                              <1> ;  1     |---|---------------------------------------|
  1912                              <1> ;        |r/w|       i-number of open file           |
  1913                              <1> ;        |---|---------------------------------------| 
  1914                              <1> ;        |               device number               |
  1915                              <1> ;        |-------------------------------------------|
  1916                              <1> ;    (*) | offset pointer, i.e., r/w pointer to file |
  1917                              <1> ;        |-------------------------------------------| 
  1918                              <1> ;        |  flag that says    | number of processes  |
  1919                              <1> ;        |   file deleted     | that have file open  |
  1920                              <1> ;        |-------------------------------------------| 
  1921                              <1> ;  2     |                                           |
  1922                              <1> ;        |-------------------------------------------| 
  1923                              <1> ;        |                                           |
  1924                              <1> ;        |-------------------------------------------|
  1925                              <1> ;        |                                           |
  1926                              <1> ;        |-------------------------------------------|
  1927                              <1> ;        |                                           |
  1928                              <1> ;        |-------------------------------------------| 
  1929                              <1> ;  3     |                                           | 
  1930                              <1> ;        |                                           |  
  1931                              <1> ;
  1932                              <1> ; (*) Retro UNIX 386 v1 modification: 32 bit offset pointer 
  1933                              <1> 
  1934                              <1> ; 27/03/2020 - Retro UNIX 386 v2 - FSP (OPEN FILES) TABLE 
  1935                              <1> 
  1936                              <1> ;Entry
  1937                              <1> ;         15                    7                   0
  1938                              <1> ;  1     |-------------------------------------------|
  1939                              <1> ;        |   	     i-number of open file           |
  1940                              <1> ;        |-------------------------------------------| 
  1941                              <1> ;        |        high word of 32 bit i-number       |
  1942                              <1> ;        |-------------------------------------------|
  1943                              <1> ;        | open mode & status  |   device number     |
  1944                              <1> ;        |-------------------------------------------|
  1945                              <1> ;        |    reserved byte    |     open count      |
  1946                              <1> ;        |-------------------------------------------| 
  1947                              <1> ;        | offset pointer, i.e., r/w pointer to file |
  1948                              <1> ;        |-------------------------------------------|
  1949                              <1> ;        |   64 bit file offset pointer (bit 16-31)  | 
  1950                              <1> ;        |-------------------------------------------|
  1951                              <1> ;        |   64 bit file offset pointer (bit 32-47)  | 
  1952                              <1> ;        |-------------------------------------------|
  1953                              <1> ;        |   64 bit file offset pointer (bit 48-63)  | 
  1954                              <1> ;        |-------------------------------------------|
  1955                              <1> ;  2     |                                           |
  1956                              <1> ;        |-------------------------------------------| 
  1957                              <1> ;        |                                           |
  1958                              <1> ;        |-------------------------------------------|
  1959                              <1> ;        |                                           |
  1960                              <1> ;        |-------------------------------------------|
  1961                              <1> ;        |                                           |
  1962                              <1> ;        |-------------------------------------------| 
  1963                              <1> ;        |                                           | 
  1964                              <1> 
  1965                              <1> ; 23/07/2022 - TRDOS 386 Kernel v2.0.5
  1966                              <1> ; OPENFILES equ 10 (sysdefs.s)
  1967                              <1> ;; 06/10/2016
  1968                              <1> ;; Open File Parameters (trdoskx.s)
  1969                              <1> ;OF_FCLUSTER:	resd OPENFILES  ; First clusters of open files
  1970                              <1> ;OF_DRIVE:	resb OPENFILES  ; Logical DOS drive numbers of open files 
  1971                              <1> ;OF_MODE:	resb OPENFILES  ; Open mode (1 = read, 2 = write, 3 = r&w) 
  1972                              <1> ;OF_STATUS:	resb OPENFILES  ; (bit 0 = read, bit 1 = write)
  1973                              <1> ;OF_OPENCOUNT:	resb OPENFILES  ; Open counts of open files
  1974                              <1> ;OF_POINTER:	resd OPENFILES	; File seek/read/write pointer
  1975                              <1> ;OF_SIZE:	resd OPENFILES	; File sizes of open files (in bytes)
  1976                              <1> ;OF_DIRFCLUSTER: resd OPENFILES  ; Directory First Clusters of open files
  1977                              <1> ;OF_DIRCLUSTER:	resd OPENFILES  ; Directory (Entry) Clusters of open files
  1978                              <1> ;OF_VOLUMEID:	resd OPENFILES  ; Vol ID for removable drives of open files
  1979                              <1> ;OF_CCLUSTER:	resd OPENFILES  ; Current clusters of open files
  1980                              <1> ;OF_CCINDEX:	resd OPENFILES  ; Cluster index numbers of current clusters
  1981                              <1> ;; 24/10/2016
  1982                              <1> ;OF_DIRENTRY:	resw OPENFILES  ; Directory entry index no. in dir cluster
  1983                              <1> 
  1984                              <1> ; 17/04/2021
  1985                              <1> ; ('sysopen_device' procedure is disabled as temporary)
  1986                              <1> 
  1987                              <1> ;sysopen_device:
  1988                              <1> ;	; 15/10/2016
  1989                              <1> ;	; 08/10/2016
  1990                              <1> ;	; 07/10/2016 (TRDOS 386 = TRDOS v2.0)
  1991                              <1> ;	push	ecx ; open mode
  1992                              <1> ;	mov	ebp, esp
  1993                              <1> ;	mov	ecx, 16 ; transfer length = 16 bytes 
  1994                              <1> ;	sub	esp, ecx
  1995                              <1> ;	mov	edi, esp ; destination address 
  1996                              <1> ;	mov 	esi, ebx ; dev name in user's memory space
  1997                              <1> ;	call	transfer_from_user_buffer
  1998                              <1> ;	jnc	short sysopen_dev_0
  1999                              <1> ;	; eax = ERR_OUT_OF_MEMORY = 4 = ERR_MINOR_IM
  2000                              <1> ;	pop	ecx
  2001                              <1> ;sysopen_dev_err:
  2002                              <1> ;	mov	[u.r0], eax
  2003                              <1> ;	mov	[u.error], eax
  2004                              <1> ;	jmp	error
  2005                              <1> ;sysopen_dev_0:
  2006                              <1> ;	mov	esi, edi ; Device name addr (max. 16 bytes, ASCIIZ) 
  2007                              <1> ;			 ; for example: "tty, TTY, /dev/tty"
  2008                              <1> ;	call	get_device_number
  2009                              <1> ;	mov	esp, ebp
  2010                              <1> ;	pop	ecx
  2011                              <1> ;	jnc	short sysopen_dev_1
  2012                              <1> ;	mov	eax, ERR_INV_DEV_NAME ; 24 ; 'invalid device name !'
  2013                              <1> ;	jmp	short sysopen_dev_err
  2014                              <1> ;sysopen_dev_1:
  2015                              <1> ;	; eax = Device Number (AL)
  2016                              <1> ;	;  cl = Open mode (2 = device read, 3 = device write)
  2017                              <1> ;       xor     ebx, ebx ; 0
  2018                              <1> ;sysopen_dev_2: ; scan the list of entries
  2019                              <1> ;       cmp     [ebx+u.fp], bl ; 0
  2020                              <1> ;       jna     short sysopen_dev_3 ; empty slot
  2021                              <1> ;       inc     bl
  2022                              <1> ;       cmp     bl, 10
  2023                              <1> ;	jb	short sysopen_dev_2
  2024                              <1> ;	;
  2025                              <1> ;	mov	eax, ERR_TOO_MANY_FILES ; too many open files !
  2026                              <1> ;	jmp	short sysopen_dev_err
  2027                              <1> ;sysopen_dev_3:
  2028                              <1> ;	mov 	[u.r0], ebx ; File/Device index/handle/descriptor
  2029                              <1> ;	; eax = device number (entry offset)
  2030                              <1> ;	mov	ch, [eax+DEV_ACCESS] ; bit 0 = accessable by users
  2031                              <1> ;				     ; bit 1 = read access perm
  2032                              <1> ;				     ; bit 2 = write access perm
  2033                              <1> ;				     ; bit 3 = IOCTL permit to users
  2034                              <1> ;				     ; bit 4 = block device if set
  2035                              <1> ;				     ; bit 5 = 16 bit or 1024 byte
  2036                              <1> ;				     ; bit 6 = 32 bit or 2048 byte
  2037                              <1> ;				     ; bit 7 = installable device drv
  2038                              <1> ;	test 	ch, 1 ; accessable by normal users (except root)
  2039                              <1> ;	jnz	short sysopen_dev_4 ; yes, permission has been given
  2040                              <1> ;	cmp	byte [u.uid], 0 ; root?
  2041                              <1> ;	jna	short sysopen_dev_4 ; superuser can open all devices
  2042                              <1> ;sysopen_dev_perm_err:
  2043                              <1> ;	mov	eax, ERR_DEV_ACCESS  ; 11 = 'permission denied !'
  2044                              <1> ;	jmp	short sysopen_dev_err
  2045                              <1> ;sysopen_dev_4:
  2046                              <1> ;	shr	ch, 1 ; result: 1 = read, 2 = write, 3 = r & w 
  2047                              <1> ;	dec	cl  ; result: 1 = read, 2 = write
  2048                              <1> ;	test	cl, ch
  2049                              <1> ;	jz	short sysopen_dev_perm_err 
  2050                              <1> ;
  2051                              <1> ;	shl	ch, 1 ; bit 0 = 0
  2052                              <1> ;	; eax = device number (entry offset)
  2053                              <1> ;	call	device_open
  2054                              <1> ;	jc	short sysopen_dev_perm_err 
  2055                              <1> ;
  2056                              <1> ;	; eax = device number (entry offset)
  2057                              <1> ;	or	al, 80h ; set device bit (set bit 7 to 1)
  2058                              <1> ;	mov	ebx, [u.r0]
  2059                              <1> ;	mov	[ebx+u.fp], al	; bit 7 (=1) points to device	
  2060                              <1> ;	
  2061                              <1> ;	jmp	sysret
  2062                              <1> 
  2063                              <1> sysmkdir: ; < make directory >
  2064                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5 
  2065                              <1> 	; 15/10/2016
  2066                              <1> 	; 10/10/2016 (TRDOS 386 = TRDOS v2.0) 
  2067                              <1> 	;	     -derived from INT_21H.ASM-
  2068                              <1> 	;            ("loc_INT21h_create_file")
  2069                              <1>         ; 	10/07/2011 (12/03/2011)
  2070                              <1>         ;	INT 21h Function AH = 3Ch
  2071                              <1>         ;	Create File
  2072                              <1>         ;	INPUT
  2073                              <1>         ;	   CX = Attributes
  2074                              <1>         ;          DS:DX= Address of zero terminaned path name
  2075                              <1>         ;
  2076                              <1>         ;
  2077                              <1> 	; 14/05/2015 (Retro UNIX 386 v1 - Beginning)
  2078                              <1> 	; 27/05/2013 - 02/08/2013 (Retro UNIX 8086 v1)
  2079                              <1> 	;
  2080                              <1> 	; 'sysmkdir' creates an empty directory whose name is
  2081                              <1> 	; pointed to by arg 1. The mode of the directory is arg 2.	
  2082                              <1> 	; The special entries '.' and '..' are not present.
  2083                              <1> 	; Errors are indicated if the directory already exists or		
  2084                              <1> 	; user is not the super user. 
  2085                              <1> 	;
  2086                              <1> 	; Calling sequence:
  2087                              <1> 	;	sysmkdir; name; mode
  2088                              <1> 	; Arguments:
  2089                              <1> 	;	name - points to the name of the directory
  2090                              <1> 	;	mode - mode of the directory
  2091                              <1> 	; Inputs: (arguments)
  2092                              <1> 	; Outputs: -
  2093                              <1> 	;    (sets 'directory' flag to 1; 
  2094                              <1> 	;    'set user id on execution' and 'executable' flags to 0)
  2095                              <1> 	; ...............................................................
  2096                              <1> 	;				
  2097                              <1> 	; Retro UNIX 8086 v1 modification: 
  2098                              <1> 	;       'sysmkdir' system call has two arguments; so,
  2099                              <1> 	;	* 1st argument, name is pointed to by BX register
  2100                              <1> 	;	* 2nd argument, mode is in CX register
  2101                              <1> 	;
  2102                              <1> 	; TRDOS 386 (10/10/2016)
  2103                              <1> 	;	
  2104                              <1>         ; INPUT ->
  2105                              <1>         ;	   CL = Directory Attributes
  2106                              <1> 	;     	      bit 0 (1) - Read only file/dir (R)
  2107                              <1> 	;             bit 1 (1) - Hidden file/dir (H)
  2108                              <1>         ;             bit 2 (1) - System file/dir (R)
  2109                              <1> 	;             bit 3 (1) - Volume label/name (V)
  2110                              <1>         ;             bit 4 (1) - Subdirectory (D)
  2111                              <1> 	;	      bit 5 (1) - File/Dir has been archived (A)
  2112                              <1> 	;	   CX = 0 -> create normal directory	 	
  2113                              <1>         ;          EBX = Pointer to directory name (ASCIIZ) -path-
  2114                              <1> 	;	
  2115                              <1> 	; OUTPUT ->
  2116                              <1> 	;          eax = First cluster of the new directory
  2117                              <1> 	;          cf = 1 -> Error code in AL
  2118                              <1> 	;
  2119                              <1> 	; Modified Registers: EAX (at the return of system call)
  2120                              <1> 	;  
  2121                              <1> 	; Note: If the file or directory is existing
  2122                              <1> 	;	an access error will be returned. 
  2123                              <1> 
  2124 0000D39F 6621C9              <1> 	and	cx, cx ; if cx = 0 -> create a normal subdir
  2125 0000D3A2 7414                <1> 	jz	short sysmkdir_1
  2126                              <1> 
  2127 0000D3A4 F6C110              <1> 	test	cl, 10h ; if dir flags set, also use other flags
  2128                              <1> 	;jnz	sysmkdir_0 ; jump to head of 'syscreat'
  2129                              <1> 	; 23/07/2022
  2130 0000D3A7 7405                <1> 	jz	short sysmkdir_invf
  2131                              <1> sysmkdir_3:
  2132 0000D3A9 E9D3FDFFFF          <1> 	jmp	sysmkdir_0
  2133                              <1> 
  2134                              <1> sysmkdir_invf:
  2135                              <1> 	; CX has wrong flags
  2136 0000D3AE B817000000          <1> 	mov 	eax, ERR_INV_FLAGS
  2137 0000D3B3 E9A6FEFFFF          <1> 	jmp	sysopen_dev_err
  2138                              <1> 
  2139                              <1> sysmkdir_1:
  2140 0000D3B8 B110                <1> 	mov	cl, 10h ; set subdir flag and reset other flags
  2141                              <1> 	;jmp	sysmkdir_0
  2142                              <1> 	; 23/07/2022
  2143 0000D3BA EBED                <1> 	jmp	short sysmkdir_3 ; jump to head of 'syscreat'
  2144                              <1> sysmkdir_2: 
  2145                              <1> 	; jump from 'syscreat' ; from 'syscreat_1'
  2146                              <1> 	;  CL = Directory attributes/flags  
  2147 0000D3BC BE[EC800100]        <1> 	mov	esi, FindFile_Name 
  2148 0000D3C1 E882D8FFFF          <1> 	call	make_sub_directory
  2149                              <1> 	;jc	sysopen_err       ; NOTE: Old type (TRDOS 8086)
  2150                              <1> 				  ; error codes must be modified
  2151                              <1> 				  ; for next TRDOS 386 versions
  2152                              <1> 				  ; (10/10/2016)
  2153                              <1> 				  ; Old (MSDOS type)
  2154                              <1> 				  ; error codes (2011):
  2155                              <1> 				  ;  2 = file not found
  2156                              <1> 				  ;  3 = directory not found
  2157                              <1> 				  ;  5 = access denied
  2158                              <1> 				  ; 12 = no more files
  2159                              <1> 			          ; 19 = disk write protected   
  2160                              <1> 				  ; 39 = insufficient disk space
  2161                              <1> 				  ; 'sysdefs.s' ; 10/10/2016  	
  2162                              <1> 	; 23/07/2022
  2163 0000D3C6 7305                <1> 	jnc	short sysmkdir_4
  2164 0000D3C8 E9B4FEFFFF          <1> 	jmp	sysopen_err
  2165                              <1> 
  2166                              <1> sysmkdir_4:	
  2167 0000D3CD A3[1C010300]        <1> 	mov	[u.r0], eax ; New sub dir's first cluster
  2168 0000D3D2 E86B4D0000          <1>         call 	reset_working_path
  2169 0000D3D7 E993F9FFFF          <1> 	jmp	sysret	
  2170                              <1> 
  2171                              <1> sysclose: ;<close file>
  2172                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
  2173                              <1> 	; 06/10/2016 (TRDOS 386 = TRDOS v2.0) 
  2174                              <1> 	;
  2175                              <1> 	; 14/05/2015 (Retro UNIX 386 v1 - Beginning)
  2176                              <1> 	; 22/05/2013 - 26/05/2013 (Retro UNIX 8086 v1)
  2177                              <1> 	;
  2178                              <1> 	; 'sysclose', given a file descriptor in 'u.r0', closes the
  2179                              <1> 	; associated file. The file descriptor (index to 'u.fp' list)
  2180                              <1> 	; is put in r1 and 'fclose' is called.
  2181                              <1> 	;
  2182                              <1> 	; Calling sequence:
  2183                              <1> 	;	sysclose
  2184                              <1> 	; Arguments:
  2185                              <1> 	;	-  
  2186                              <1> 	; Inputs: *u.r0 - file descriptor
  2187                              <1> 	; Outputs: -
  2188                              <1> 	; ...............................................................
  2189                              <1> 	;				
  2190                              <1> 	; Retro UNIX 8086 v1 modification:
  2191                              <1> 	;	 The user/application program puts file descriptor
  2192                              <1> 	;        in BX register as 'sysclose' system call argument.
  2193                              <1> 	; 	 (argument transfer method 1)
  2194                              <1> 
  2195                              <1> 	; TRDOS 386 (06/10/2016)
  2196                              <1> 	;	
  2197                              <1>         ; INPUT ->
  2198                              <1>         ;	   EBX = File Handle/Number (file index) (AL)
  2199                              <1> 	; OUTPUT ->
  2200                              <1> 	;          cf = 0 -> EAX = 0
  2201                              <1> 	;          cf = 1 -> Error code in EAX (ERR_FILE_NOT_OPEN)
  2202                              <1> 	;
  2203                              <1> 	; Modified Registers: EAX (at the return of system call)
  2204                              <1> 	;  
  2205                              <1> 
  2206 0000D3DC 89D8                <1> 	mov 	eax, ebx
  2207 0000D3DE 31DB                <1> 	xor	ebx, ebx	
  2208 0000D3E0 891D[1C010300]      <1> 	mov	[u.r0], ebx ; 0  ; return value of EAX
  2209 0000D3E6 E831310000          <1> 	call 	fclose
  2210                              <1> 	;jnc	sysret
  2211                              <1> 	; 23/07/2022
  2212 0000D3EB 7205                <1> 	jc	short sysclose_err
  2213 0000D3ED E97DF9FFFF          <1> 	jmp	sysret
  2214                              <1> sysclose_err:
  2215 0000D3F2 B80A000000          <1> 	mov	eax, ERR_FILE_NOT_OPEN ; file not open !
  2216 0000D3F7 A3[84010300]        <1> 	mov	[u.error], eax ;
  2217 0000D3FC A3[1C010300]        <1> 	mov	[u.r0], eax ; ! invalid handle !
  2218 0000D401 E949F9FFFF          <1> 	jmp	error
  2219                              <1> 
  2220                              <1> sysread: ; < read from file >
  2221                              <1> 	; 11/10/2016 (TRDOS 386 = TRDOS v2.0) 
  2222                              <1> 	;	     -derived from INT_21H.ASM-
  2223                              <1> 	;            ("loc_INT21h_read_file")
  2224                              <1>         ; 	13/03/2011 (05/03/2011)
  2225                              <1>         ;	INT 21h Function AH = 3Fh
  2226                              <1>         ;	Read from a File
  2227                              <1>         ;	INPUT
  2228                              <1> 	;	   BX = File Handle
  2229                              <1>         ;	   CX = Number of bytes to read
  2230                              <1>         ;          DS:DX= Buffer address
  2231                              <1>         ;
  2232                              <1> 	; Note: TRDOS 386 'sysread' has been derived from 
  2233                              <1> 	;	Retro UNIX 386 v1 'sysread', except a few 
  2234                              <1> 	;	code modifications.
  2235                              <1> 	;
  2236                              <1> 	; 13/05/2015 (Retro UNIX 386 v1)
  2237                              <1> 	; 11/05/2015 (Retro UNIX 386 v1 - Beginning)
  2238                              <1> 	; 23/05/2013 (Retro UNIX 8086 v1)
  2239                              <1> 	;
  2240                              <1> 	; 'sysread' is given a buffer to read into and the number of
  2241                              <1> 	; characters to be read. If finds the file from the file
  2242                              <1> 	; descriptor located in *u.r0 (r0). This file descriptor
  2243                              <1> 	; is returned from a successful open call (sysopen).
  2244                              <1> 	; The i-number of file is obtained via 'rw1' and the data
  2245                              <1> 	; is read into core via 'readi'.
  2246                              <1> 	;
  2247                              <1> 	; Calling sequence:
  2248                              <1> 	;	sysread; buffer; nchars
  2249                              <1> 	; Arguments:
  2250                              <1> 	;	buffer - location of contiguous bytes where 
  2251                              <1> 	;		 input will be placed.
  2252                              <1> 	;	nchars - number of bytes or characters to be read.
  2253                              <1> 	; Inputs: *u.r0 - file descriptor (& arguments)
  2254                              <1> 	; Outputs: *u.r0 - number of bytes read.	
  2255                              <1> 	; ...............................................................
  2256                              <1> 	;				
  2257                              <1> 	; Retro UNIX 8086 v1 modification: 
  2258                              <1> 	;       'sysread' system call has three arguments; so,
  2259                              <1> 	;	* 1st argument, file descriptor is in BX register
  2260                              <1> 	;	* 2nd argument, buffer address/offset in CX register
  2261                              <1> 	;	* 3rd argument, number of bytes is in DX register
  2262                              <1> 	;
  2263                              <1> 	;	AX register (will be restored via 'u.r0') will return
  2264                              <1> 	;	to the user with number of bytes read. 
  2265                              <1> 	;
  2266                              <1> 	; TRDOS 386 (05/10/2016)
  2267                              <1> 	;	
  2268                              <1>         ; INPUT ->
  2269                              <1>         ;	   EBX = File handle (descriptor/index)
  2270                              <1> 	;	   ECX = Buffer address		
  2271                              <1>         ;          EDX = Number of bytes
  2272                              <1> 	; OUTPUT ->
  2273                              <1> 	;          EAX = Number of bytes have been read
  2274                              <1> 	;          cf = 1 -> Error code in AL
  2275                              <1> 	;
  2276                              <1> 	; Modified Registers: EAX (at the return of system call)
  2277                              <1> 	; 
  2278                              <1> 
  2279                              <1> 	; EBX = File descriptor
  2280 0000D406 E85F310000          <1> 	call	getf1 
  2281 0000D40B 7273                <1> 	jc	short device_read ; read data from device
  2282                              <1> 	; EAX = First cluster of the file
  2283                              <1> 
  2284 0000D40D E83F000000          <1> 	call	rw1
  2285 0000D412 730A                <1> 	jnc	short sysread_0
  2286                              <1> 
  2287 0000D414 A3[1C010300]        <1> 	mov	[u.r0], eax ; error code
  2288 0000D419 E931F9FFFF          <1> 	jmp	error
  2289                              <1> 	 
  2290                              <1> sysread_0:
  2291 0000D41E E8CC340000          <1> 	call	readi
  2292 0000D423 EB1D                <1> 	jmp	short rw0
  2293                              <1> 
  2294                              <1> syswrite: ; < write to file >
  2295                              <1> 	; 23/10/2016
  2296                              <1> 	; 11/10/2016 (TRDOS 386 = TRDOS v2.0) 
  2297                              <1> 	;	     -derived from INT_21H.ASM-
  2298                              <1> 	;            ("loc_INT21h_write_file")
  2299                              <1>         ; 	13/03/2011 (05/03/2011)
  2300                              <1>         ;	INT 21h Function AH = 40h
  2301                              <1>         ;	Write to a File
  2302                              <1>         ;	INPUT
  2303                              <1> 	;	   BX = File Handle
  2304                              <1>         ;	   CX = Number of bytes to write
  2305                              <1>         ;          DS:DX= Buffer address
  2306                              <1>         ;
  2307                              <1> 	; Note: TRDOS 386 'sysrwrite' has been derived from 
  2308                              <1> 	;	Retro UNIX 386 v1 'syswrite', except a few 
  2309                              <1> 	;	code modifications.
  2310                              <1> 	;
  2311                              <1> 
  2312                              <1> 	; 13/05/2015 (Retro UNIX 386 v1)
  2313                              <1> 	; 11/05/2015 (Retro UNIX 386 v1 - Beginning)
  2314                              <1> 	; 23/05/2013 (Retro UNIX 8086 v1)
  2315                              <1> 	;
  2316                              <1> 	; 'syswrite' is given a buffer to write onto an output file
  2317                              <1> 	; and the number of characters to write. If finds the file
  2318                              <1> 	; from the file descriptor located in *u.r0 (r0). This file 
  2319                              <1> 	; descriptor is returned from a successful open or create call
  2320                              <1> 	; (sysopen or syscreat). The i-number of file is obtained via
  2321                              <1> 	; 'rw1' and buffer is written on the output file via 'write'.
  2322                              <1> 	;
  2323                              <1> 	; Calling sequence:
  2324                              <1> 	;	syswrite; buffer; nchars
  2325                              <1> 	; Arguments:
  2326                              <1> 	;	buffer - location of contiguous bytes to be writtten.
  2327                              <1> 	;	nchars - number of characters to be written.
  2328                              <1> 	; Inputs: *u.r0 - file descriptor (& arguments)
  2329                              <1> 	; Outputs: *u.r0 - number of bytes written.	
  2330                              <1> 	; ...............................................................
  2331                              <1> 	;				
  2332                              <1> 	; Retro UNIX 8086 v1 modification: 
  2333                              <1> 	;       'syswrite' system call has three arguments; so,
  2334                              <1> 	;	* 1st argument, file descriptor is in BX register
  2335                              <1> 	;	* 2nd argument, buffer address/offset in CX register
  2336                              <1> 	;	* 3rd argument, number of bytes is in DX register
  2337                              <1> 	;
  2338                              <1> 	;	AX register (will be restored via 'u.r0') will return
  2339                              <1> 	;	to the user with number of bytes written. 
  2340                              <1> 	;
  2341                              <1> 	; INPUT ->
  2342                              <1>         ;	   EBX = File handle (descriptor/index)
  2343                              <1> 	;	   ECX = Buffer address		
  2344                              <1>         ;          EDX = Number of bytes
  2345                              <1> 	; OUTPUT ->
  2346                              <1> 	;          EAX = Number of bytes have been written
  2347                              <1> 	;          cf = 1 -> Error code in AL
  2348                              <1> 	;
  2349                              <1> 	; Modified Registers: EAX (at the return of system call)
  2350                              <1> 	;  
  2351                              <1> 
  2352                              <1> 	; EBX = File descriptor
  2353 0000D425 E840310000          <1> 	call	getf1 
  2354 0000D42A 7254                <1> 	jc	short device_write ; write data to device
  2355                              <1> 	; EAX = First cluster of the file
  2356                              <1> 	; EBX = File number  (Open file number) ; 23/10/2016
  2357                              <1> 
  2358 0000D42C E820000000          <1> 	call	rw1
  2359 0000D431 730A                <1> 	jnc	short syswrite_0
  2360 0000D433 A3[1C010300]        <1> 	mov	[u.r0], eax ; error code
  2361 0000D438 E912F9FFFF          <1> 	jmp	error
  2362                              <1> 	 
  2363                              <1> syswrite_0:
  2364 0000D43D E8C63B0000          <1> 	call	writei
  2365                              <1> rw0: ; 1:
  2366 0000D442 A1[48010300]        <1>         mov	eax, [u.nread]
  2367 0000D447 A3[1C010300]        <1> 	mov	[u.r0], eax
  2368 0000D44C E91EF9FFFF          <1> 	jmp	sysret
  2369                              <1> rw1:	
  2370                              <1> 	; 17/04/2021 (TRDOS 386 v2.0.4)
  2371                              <1> 	; 11/10/2016 (TRDOS 386 = TRDOS v2.0) 
  2372                              <1> 	; 14/05/2015 (Retro UNIX 386 v1)
  2373                              <1> 	; 11/05/2015 (Retro UNIX 386 v1 - Beginning)
  2374                              <1> 	; 23/05/2013 - 24/05/2013 (Retro UNIX 8086 v1)
  2375                              <1> 	; System call registers: ebx, ecx, edx (through 'sysenter')
  2376                              <1> 	;
  2377                              <1> 	; EBX = File descriptor
  2378                              <1> 	;call	getf1 ; calling point in 'getf' from 'rw1'
  2379                              <1> 	;jc	short device_rw ; read/write data from/to device
  2380                              <1> 	; EAX = First cluster of the file
  2381                              <1> 
  2382 0000D451 83F802              <1> 	cmp 	eax, 2
  2383 0000D454 7217                <1> 	jb	short rw2
  2384                              <1> 	;
  2385 0000D456 890D[40010300]      <1> 	mov	[u.base], ecx 	; buffer address/offset 
  2386                              <1> 				;(in the user's virtual memory space)
  2387 0000D45C 8915[44010300]      <1> 	mov	[u.count], edx 
  2388                              <1> 
  2389 0000D462 C705[84010300]0000- <1>         mov	dword [u.error], 0 ; reset the last error code
  2389 0000D46A 0000                <1>
  2390 0000D46C C3                  <1> 	retn
  2391                              <1> rw2:
  2392 0000D46D B80A000000          <1> 	mov	eax, ERR_FILE_NOT_OPEN ; file not open !
  2393                              <1> 	;mov	dword [u.error], eax
  2394                              <1> 	;retn
  2395                              <1> 	; 17/04/2021
  2396 0000D472 EB06                <1> 	jmp	short rw4
  2397                              <1> rw3: 
  2398 0000D474 B80B000000          <1> 	mov	eax, ERR_FILE_ACCESS ; permission denied !
  2399 0000D479 F9                  <1> 	stc
  2400                              <1> rw4:	; 17/04/2021
  2401 0000D47A A3[84010300]        <1> 	mov	dword [u.error], eax
  2402 0000D47F C3                  <1> 	retn
  2403                              <1> 
  2404                              <1> 	; 17/04/2021 (temporary)
  2405                              <1> device_write:
  2406                              <1> device_read:
  2407                              <1> 	; 17/04/2021 - TRDOS 386 v2.0.4
  2408                              <1> 	;	(temporary modifications)
  2409                              <1> 	;
  2410                              <1> 	; 11/10/2016 (TRDOS 386 = TRDOS v2.0)
  2411                              <1> 	; cl = DEV_OPENMODE ; open mode
  2412                              <1> 	; ch = DEV_ACCESS   ; access flags   
  2413                              <1> 	; al = DEV_DRIVER   ; device number (eax)
  2414                              <1> 
  2415                              <1> 	; 17/04/2021 (temporary)
  2416 0000D480 EBEB                <1> 	jmp	short rw2 ; file not open
  2417                              <1> 
  2418                              <1> ;	test	cl, 1 ; 1 = read, 2 = write, 3 = read&write
  2419                              <1> ;	jz	short rw3
  2420                              <1> ;
  2421                              <1> ;	mov	ebx, eax
  2422                              <1> ;	shl	bx, 2 ; *4
  2423                              <1> ;
  2424                              <1> ;	test	ch, 80h ; bit 7, installable device driver flag
  2425                              <1> ;	jz	short d_read_2 ; Kernel device
  2426                              <1> ;	; installable device
  2427                              <1> ;d_read_1:
  2428                              <1> ;       jmp	dword [ebx+IDEV_RADDR-4]
  2429                              <1> ;d_read_2:
  2430                              <1> ;	jmp	dword [ebx+KDEV_RADDR-4]
  2431                              <1> 
  2432                              <1> ;device_write:
  2433                              <1> 	; 17/04/2021 - TRDOS 386 v2.0.4
  2434                              <1> 	;	(temporary modifications)
  2435                              <1> 	;
  2436                              <1> 	; 11/10/2016 (TRDOS 386 = TRDOS v2.0)
  2437                              <1> 	; cl = DEV_OPENMODE ; open mode
  2438                              <1> 	; ch = DEV_ACCESS   ; access flags   
  2439                              <1> 	; al = DEV_DRIVER   ; device number (eax)
  2440                              <1> 
  2441                              <1> 	; 17/04/2021 (temporary)
  2442                              <1> 	;jmp	short rw2 ; file not open
  2443                              <1> 
  2444                              <1> ;	test	cl, 2 ; 1 = read, 2 = write, 3 = read&write
  2445                              <1> ;	jz	short rw3	
  2446                              <1> ;
  2447                              <1> ;	mov	ebx, eax
  2448                              <1> ;	shl	bx, 2 ; *4
  2449                              <1> ;
  2450                              <1> ;	test	ch, 80h ; bit 7, installable device driver flag
  2451                              <1> ;	jz	short d_write_2 ; Kernel device
  2452                              <1> ;	; installable device
  2453                              <1> ;d_write_1:
  2454                              <1> ;       jmp	dword [ebx+IDEV_WADDR-4]
  2455                              <1> ;d_write_2:
  2456                              <1> ;	jmp	dword [ebx+KDEV_WADDR-4]
  2457                              <1> 
  2458                              <1> systimer:
  2459                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
  2460                              <1> 	; 02/01/2017
  2461                              <1> 	; 21/12/2016
  2462                              <1> 	; 19/12/2016
  2463                              <1> 	; 10/12/2016 (callback)
  2464                              <1> 	; 10/06/2016
  2465                              <1> 	; 07/06/2016
  2466                              <1> 	; 06/06/2016
  2467                              <1> 	; 21/05/2016
  2468                              <1> 	; 19/05/2016
  2469                              <1> 	; 18/05/2016 - TRDOS 386 (TRDOS v2.0)
  2470                              <1> 	; (TRDOS 386 feature only!)
  2471                              <1> 	;
  2472                              <1> 	; (start or stop timer event(s))	
  2473                              <1> 	;
  2474                              <1> 	; INPUT ->
  2475                              <1> 	;	BL = Signal return byte (response byte)
  2476                              <1> 	;	     (Any requested value between 0 and 255)
  2477                              <1> 	;	     (Kernel will put it at the requested address)
  2478                              <1> 	;	BH = Time count unit
  2479                              <1> 	;	     0 = Stop timer event
  2480                              <1> 	;	     1 = 18.2 ticks per second
  2481                              <1> 	;	     2 = 10 milliseconds
  2482                              <1> 	;	     3 = 1 second (for real time clock interrupt)
  2483                              <1> 	;	     4 = time/tick count in current time count unit
  2484                              <1> 	;	    // 10/12/2016
  2485                              <1> 	;	    80h = Stop timer event (callback method)
  2486                              <1> 	;	    81h = 18.2 ticks per second, callback method
  2487                              <1> 	;	    82h = 10 milliseconds, callback method
  2488                              <1> 	;	    83h = 1 second (for RTC int), callback method
  2489                              <1> 	;	    84h = current time count unit, callback method
  2490                              <1> 	;
  2491                              <1> 	;	    Note: Only 03h or 83h will set real time clock
  2492                              <1> 	;		  (RTC) events (Others are for PIT events)!
  2493                              <1> 	;	
  2494                              <1> 	;	NOTE: If callback (user service) method is used,
  2495                              <1> 	;	    EDX will point to the return address (of service
  2496                              <1> 	;	    procedure) in user's space instead of signal 
  2497                              <1> 	;	    response byte address. (TRDOS 386 kernel will
  2498                              <1> 	;	    direct the cpu to that address -in user's space-
  2499                              <1> 	;	    at the return of system call or interrupt 
  2500                              <1> 	;	    just after the adjusted count/time is elapsed.)
  2501                              <1> 	;	    User's sevice routine must be ended with a
  2502                              <1> 	;	    'iret'. Normal return addresses from system 
  2503                              <1> 	;	    calls or and interrupts will be kept same except
  2504                              <1> 	;	    the timer returns.
  2505                              <1>      	;
  2506                              <1> 	;	BH = 0 -> Stop timer event
  2507                              <1> 	;	BL = Timer event number (1 to 255) if BH = 0
  2508                              <1> 	;	     If BL = 0, all timer events (which are belongs
  2509                              <1> 	;	      to running process) will be stopped
  2510                              <1> 	;	ECX = Time/Tick count (depending on time count unit)
  2511                              <1> 	;	EDX = Signal return (Response) byte address
  2512                              <1> 	;	      (virtual address in user's memory space)
  2513                              <1> 	; OUTPUT ->
  2514                              <1> 	;	AL = Timer event number	(1 to 255) (max. value = 16)
  2515                              <1> 	;	IF BH Input = 0 & CF = 0 & AL = 0 -> 
  2516                              <1> 	;	     timer event(s) has/have been stopped/finished
  2517                              <1> 	;	CF = 1 & AL = 0 -> no timer setting space to set
  2518                              <1> 	;	CF = 1 & AL > 0 -> timer count unit is not usable
  2519                              <1> 	;
  2520                              <1> 	;	NOTE: To modify a time count for a user function,
  2521                              <1> 	;	      at first, current timer event must be stopped
  2522                              <1> 	;	      then a new timer event (which is related with
  2523                              <1> 	;	      same user function) must be started.
  2524                              <1> 	;		
  2525                              <1> 	;	      Signal return (response) byte may be used for 
  2526                              <1> 	;	      several purposes. Kernel will put this value 
  2527                              <1> 	;	      to requested address during timer interrupt,
  2528                              <1> 	;	      program/user can check this value to understand
  2529                              <1> 	;	      which event has been occurred and what is changed.
  2530                              <1> 	;	      (Multi timer events can share same signal address)
  2531                              <1> 	;	
  2532                              <1> 	;	NOTE: If the process is running while the time count
  2533                              <1> 	;	      is reached, kernel will put signal return (response)
  2534                              <1> 	;	      byte value at requested address during timer
  2535                              <1> 	;	      interrupt and the process will continue to run.
  2536                              <1> 	;	      Program/process must call (jump to) it's timer event
  2537                              <1> 	;	      function as required, for checking the timer event
  2538                              <1> 	;	      status via signal return (response) byte address. 
  2539                              <1> 	;
  2540                              <1> 	;	      If the process is not running (waiting or sleeping
  2541                              <1> 	;	      or released) while the time count is reached,
  2542                              <1> 	;	      it is restarted from where it left, to ensure
  2543                              <1> 	;	      proper multi media (video, audio, clock, timer)
  2544                              <1> 	;	      functionality.
  2545                              <1> 	;
  2546                              <1> 	;	      (It is better to use 'syswait' or 'syssleep',
  2547                              <1> 	;	      or 'sysrele' system call just after the timer
  2548                              <1> 	;	      function. Otherwise, timer events may block other
  2549                              <1> 	;	      processes which are not using timer events.)  	 		 			 		 	
  2550                              <1> 	;	     	      		 			
  2551                              <1> 	; Timer Event Structure: (max. 16 timer events, 16*16 bytes)
  2552                              <1> 	;       Owner:	        resb 1 ; 0 = free
  2553                              <1> 	;		  	       ;>0 = process number (u.uno)
  2554                              <1> 	;	Calback:	resb 1 ; 1 = callback, 0 = response byte
  2555                              <1> 	;	Interrupt:      resb 1 ; 0 = Timer interrupt (or none)
  2556                              <1> 	;		   	       ; 1 = Real Time Clock interrupt 
  2557                              <1> 	;	Response:       resb 1 ; 0 to 255, signal return value
  2558                              <1> 	;	Count Limit:	resd 1 ; count of ticks (total/set)
  2559                              <1> 	;	Current Count: 	resd 1 ; count of ticks (current)
  2560                              <1> 	;	Response Addr:  resd 1 ; response byte (pointer) address
  2561                              <1> 	;
  2562                              <1> 
  2563                              <1> 	; 19/12/2016 (timer callback)
  2564 0000D482 C605[DC880100]00    <1> 	mov	byte [tcallback], 0 
  2565 0000D489 C605[DD880100]00    <1> 	mov	byte [trtc], 0
  2566 0000D490 C705[8C010300]0000- <1> 	mov	dword [u.tcb], 0 ; this is not necessary...
  2566 0000D498 0000                <1>
  2567                              <1> 
  2568 0000D49A 80FF80              <1> 	cmp	bh, 80h
  2569 0000D49D 7224                <1> 	jb	short systimer_cb2
  2570 0000D49F 7704                <1> 	ja	short systimer_cb0
  2571                              <1> 
  2572 0000D4A1 31D2                <1> 	xor	edx, edx ; 0, reset callback address
  2573 0000D4A3 EB0B                <1> 	jmp	short systimer_cb1
  2574                              <1> 
  2575                              <1> systimer_cb0:
  2576 0000D4A5 80FF84              <1> 	cmp	bh, 84h	
  2577 0000D4A8 7764                <1> 	ja	short systimer_5 ;  undefined, error
  2578                              <1> 
  2579                              <1> 	;mov	byte [tcallback], 1 ; 19/12/2016
  2580 0000D4AA FE05[DC880100]      <1> 	inc	byte [tcallback]
  2581                              <1> 
  2582                              <1> systimer_cb1:
  2583 0000D4B0 0FB635[6D010300]    <1> 	movzx	esi, byte [u.uno] ; process number
  2584                              <1> 	;shl	si, 2	
  2585                              <1> 	; 23/07/2022
  2586 0000D4B7 C1E602              <1> 	shl	esi, 2
  2587 0000D4BA 8996[BC000300]      <1> 	mov	[esi+p.tcb-4], edx ; set process timer callback address
  2588                              <1> 				   ; (overwrite prev value if it is set!)
  2589 0000D4C0 80E77F              <1> 	and	bh, 7Fh
  2590                              <1> 
  2591                              <1> systimer_cb2:
  2592 0000D4C3 80FF02              <1> 	cmp	bh, 2
  2593 0000D4C6 7446                <1>         je      short systimer_5  ; only 18.2 ticks per second is usable
  2594                              <1> 				  ; 10 milliseconds (100 Hertz) timer 
  2595                              <1> 				  ; will be set later (18/05/2016)
  2596 0000D4C8 774C                <1>         ja      short systimer_6 
  2597                              <1> 
  2598 0000D4CA 20FF                <1> 	and	bh, bh
  2599                              <1> 	;jz	systimer_9        ; stop timer event(s)
  2600                              <1> 	; 23/07/2022
  2601 0000D4CC 7505                <1> 	jnz	short systimer_19
  2602 0000D4CE E9BA000000          <1> 	jmp	systimer_9
  2603                              <1> 
  2604                              <1> 	; bh = 1 (timer interrupt, 18.2 Hz, IBM PC/AT ROMBIOS default)
  2605                              <1> 
  2606                              <1> systimer_19:
  2607 0000D4D3 B00A                <1> 	mov	al, 10 ; (*)
  2608                              <1> 
  2609                              <1> systimer_0:
  2610 0000D4D5 B710                <1> 	mov	bh, 16
  2611                              <1> 	;
  2612 0000D4D7 383D[D7830100]      <1> 	cmp	[timer_events], bh ; 16 ; 07/06/2016
  2613 0000D4DD 7319                <1> 	jnb 	short systimer_3  ; max. 16 timer events
  2614                              <1> 	;
  2615 0000D4DF 50                  <1> 	push	eax ; (*)
  2616                              <1> 
  2617 0000D4E0 BF[2C020300]        <1> 	mov	edi, timer_set  ; beginning address of timer events
  2618                              <1> 				; setting space
  2619 0000D4E5 30C0                <1> 	xor	al, al ; 0
  2620                              <1> systimer_1:
  2621 0000D4E7 FEC0                <1> 	inc	al
  2622 0000D4E9 803F00              <1> 	cmp	byte [edi], 0 	; is it free space ?
  2623 0000D4EC 7639                <1> 	jna	short systimer_7 ; yes
  2624 0000D4EE FECF                <1> 	dec	bh
  2625 0000D4F0 7405                <1> 	jz	short systimer_2
  2626 0000D4F2 83C710              <1> 	add	edi, 16
  2627 0000D4F5 EBF0                <1> 	jmp	short  systimer_1 ; next event space
  2628                              <1> 
  2629                              <1> systimer_2:
  2630 0000D4F7 58                  <1> 	pop	eax ; (*) discard
  2631                              <1> systimer_3:
  2632 0000D4F8 C605[1C010300]00    <1> 	mov	byte [u.r0], 0
  2633                              <1> systimer_4:
  2634 0000D4FF C705[84010300]1B00- <1>         mov     dword [u.error], ERR_MISC
  2634 0000D507 0000                <1>
  2635                              <1>                                 ; one of miscellaneous/other errors
  2636 0000D509 E941F8FFFF          <1> 	jmp	error ; cf -> 1
  2637                              <1> 
  2638                              <1> systimer_5:
  2639 0000D50E 883D[1C010300]      <1> 	mov	[u.r0], bh ; Time count unit (=2 or >3)
  2640 0000D514 EBE9                <1> 	jmp	short systimer_4 ; 07/06/2016
  2641                              <1> 
  2642                              <1> systimer_6:
  2643 0000D516 80FF04              <1> 	cmp	bh, 4
  2644 0000D519 77F3                <1>         ja      short systimer_5  ; undefined time count unit
  2645                              <1> 	;jb	short systimer_16	
  2646                              <1> 
  2647                              <1> 	;mov	al, 1	; default (use current timer unit)
  2648                              <1> 			; countdown value is in ECX ! 
  2649                              <1> 			; max. value of ecx = 4294967296/10
  2650                              <1>         ;jmp    short systimer_0
  2651                              <1> 	;jmp	short systimer_19	
  2652 0000D51B 74B6                <1> 	je	short systimer_19
  2653                              <1> 
  2654                              <1> systimer_16:
  2655                              <1> 	; bh = 3
  2656                              <1> 	; timer event via real time clock interrupt
  2657                              <1> 	; interrupt/update frequency: 1 Hz (1 tick per second)
  2658                              <1> 	
  2659 0000D51D B0B6                <1> 	mov	al, 182 ; (*) ; 18.2 * 10
  2660 0000D51F FE05[DD880100]      <1> 	inc	byte [trtc] ; timer event via real time clock
  2661 0000D525 EBAE                <1>         jmp     short systimer_0
  2662                              <1> 
  2663                              <1> systimer_7:
  2664 0000D527 A2[1C010300]        <1> 	mov	[u.r0], al ; timer event number
  2665                              <1> 	;
  2666                              <1> 	; edi = address of empty timer event area
  2667 0000D52C A0[6D010300]        <1> 	mov	al, [u.uno]
  2668 0000D531 FA                  <1> 	cli 	; disable interrupts 
  2669 0000D532 AA                  <1> 	stosb	; process number
  2670 0000D533 A0[DC880100]        <1> 	mov	al, [tcallback] ; timer callback flag
  2671 0000D538 AA                  <1> 	stosb 	; 1= callback method, 0= signal response byte method
  2672 0000D539 A0[DD880100]        <1> 	mov	al, [trtc] ; timer interrupt type
  2673 0000D53E AA                  <1> 	stosb	; 1= real time clock, 0= programmable interval timer
  2674 0000D53F 88D8                <1> 	mov	al, bl ; Signal return (Response) value
  2675 0000D541 AA                  <1> 	stosb   ; response byte
  2676 0000D542 58                  <1> 	pop	eax ; (*) ; 10 or 182
  2677 0000D543 89D3                <1> 	mov	ebx, edx ; virtual address for response/signal byte
  2678 0000D545 F7E1                <1> 	mul	ecx
  2679                              <1> 	; (eax = 10 * count of 18.2 Hz timer ticks)
  2680                              <1> 	; (count down step = 10)
  2681 0000D547 AB                  <1> 	stosd  ; count limit (reset value)
  2682 0000D548 AB                  <1> 	stosd  ; current count value
  2683                              <1> 
  2684                              <1> 	; 19/12/2016
  2685 0000D549 803D[DC880100]00    <1> 	cmp	byte [tcallback], 0 ; timer callback method ?
  2686 0000D550 7604                <1> 	jna	short systimer_17 ; no	
  2687 0000D552 89D8                <1> 	mov	eax, ebx ; virtual address for callback routine 
  2688 0000D554 EB0D                <1> 	jmp	short systimer_18
  2689                              <1> 
  2690                              <1> systimer_17: ; signal response byte method
  2691                              <1> 	; ebx = virtual address
  2692                              <1> 	; [u.pgdir] = page directory's physical address
  2693                              <1> 	; 20/02/2017
  2694 0000D556 FE05[DE880100]      <1> 	inc	 byte [no_page_swap] ; 1 
  2695                              <1> 			; Do not add this page to swap queue
  2696                              <1> 			; and remove it from swap queue if it is
  2697                              <1> 			; on the queue.
  2698 0000D55C E87085FFFF          <1> 	call	get_physical_addr
  2699 0000D561 721A                <1> 	jc	short systimer_8 ; 07/06/2016
  2700                              <1> 	; eax = physical address of the virtual address in user's space
  2701                              <1> systimer_18:
  2702 0000D563 AB                  <1> 	stosd	; response addr (physical) or callback addr (virtual)
  2703 0000D564 FE05[D7830100]      <1> 	inc	byte [timer_events] ; 07/06/201
  2704                              <1> 	; 02/01/2017
  2705 0000D56A 0FB605[6D010300]    <1> 	movzx	eax, byte [u.uno]
  2706 0000D571 FE80[AF000300]      <1> 	inc	byte [eax+p.timer-1]	
  2707                              <1> 	;
  2708 0000D577 FB                  <1> 	sti 	; enable interrupts
  2709 0000D578 E9F2F7FFFF          <1> 	jmp	sysret
  2710                              <1> 
  2711                              <1> systimer_8:
  2712                              <1> 	; 10/06/2016
  2713                              <1> 	; 07/06/2016
  2714 0000D57D 28C0                <1> 	sub	al, al ; 0
  2715 0000D57F 8847F4              <1> 	mov	[edi-12], al ; clear process number (free timer event)
  2716                              <1> 	;mov	dword [edi], eax ; 0
  2717 0000D582 FB                  <1> 	sti
  2718 0000D583 A2[1C010300]        <1> 	mov	[u.r0], al ; 0
  2719 0000D588 E9C2F7FFFF          <1> 	jmp	error
  2720                              <1> 
  2721                              <1> systimer_9:
  2722                              <1> 	; 10/06/2016
  2723                              <1> 	; 07/06/2016
  2724 0000D58D 28C0                <1> 	sub	al, al
  2725 0000D58F A2[1C010300]        <1> 	mov	byte [u.r0], al ; 0
  2726 0000D594 3805[D7830100]      <1> 	cmp     byte [timer_events], al ;  0
  2727 0000D59A 7631                <1> 	jna	short systimer_12
  2728                              <1> 
  2729                              <1> 	; Note: ecx and edx are undefined here
  2730                              <1> 	;	(for stop timer function)
  2731                              <1> 
  2732 0000D59C BE[2C020300]        <1> 	mov	esi, timer_set  ; beginning address of timer events
  2733                              <1> 				; setting space	 
  2734 0000D5A1 A0[6D010300]        <1> 	mov	al, [u.uno]
  2735                              <1> 	
  2736 0000D5A6 B710                <1> 	mov	bh, 16
  2737                              <1> 
  2738 0000D5A8 08DB                <1> 	or	bl, bl
  2739 0000D5AA 7544                <1> 	jnz	short systimer_15
  2740                              <1> 
  2741                              <1> 	; clear timer event areas belong to current process
  2742                              <1> 	; (for stopping all timer events belong to current process) 
  2743 0000D5AC FA                  <1> 	cli 	; disable interrupts
  2744                              <1> systimer_10:
  2745                              <1> 	; 10/06/2016
  2746                              <1> 	; 07/06/2016 	
  2747 0000D5AD 8A26                <1> 	mov	ah, [esi]
  2748 0000D5AF 08E4                <1> 	or	ah, ah ; 0 ?
  2749 0000D5B1 7411                <1> 	jz	short systimer_11
  2750 0000D5B3 38C4                <1> 	cmp	ah, al ; is the process number (owner) same ?
  2751 0000D5B5 750D                <1>         jne     short systimer_11 ; no
  2752                              <1> 
  2753                              <1> 	;mov	byte [esi], 0
  2754 0000D5B7 66C7060000          <1> 	mov	word [esi], 0 ; clear
  2755                              <1> 	;mov	dword [esi+12], 0 ; clear
  2756                              <1> 
  2757 0000D5BC FE0D[D7830100]      <1> 	dec	byte [timer_events]
  2758 0000D5C2 7409                <1> 	jz	short systimer_12
  2759                              <1> 
  2760                              <1> systimer_11:
  2761 0000D5C4 FECF                <1> 	dec	bh
  2762 0000D5C6 7405                <1> 	jz	short systimer_12
  2763 0000D5C8 83C610              <1> 	add	esi, 16
  2764 0000D5CB EBE0                <1> 	jmp	short systimer_10
  2765                              <1> 
  2766                              <1> systimer_12:
  2767 0000D5CD 0FB635[6D010300]    <1> 	movzx	esi, byte [u.uno]
  2768 0000D5D4 08DB                <1> 	or	bl, bl ; all timer events or one timer event ?
  2769 0000D5D6 740C                <1> 	jz	short systimer_13
  2770 0000D5D8 8A9E[AF000300]      <1> 	mov	bl, [esi+p.timer-1]
  2771 0000D5DE 20DB                <1> 	and	bl, bl	; previous number of timer events for the process
  2772 0000D5E0 7408                <1> 	jz	short systimer_14
  2773 0000D5E2 FECB                <1> 	dec	bl  ; previous number of timer events for the process - 1
  2774                              <1> systimer_13:
  2775 0000D5E4 889E[AF000300]      <1> 	mov	[esi+p.timer-1], bl ; 0 ; no timer events for process
  2776                              <1> systimer_14:
  2777 0000D5EA FB                  <1> 	sti	; enable interrupts
  2778 0000D5EB E97FF7FFFF          <1> 	jmp	sysret
  2779                              <1> 
  2780                              <1> systimer_15:
  2781 0000D5F0 38FB                <1> 	cmp	bl, bh ; 16
  2782                              <1>         ;ja	systimer_4      ; max. 16 timer events !
  2783                              <1> 	; 23/07/2022
  2784 0000D5F2 7605                <1> 	jna	short systimer_21
  2785                              <1> systimer_20:
  2786 0000D5F4 E906FFFFFF          <1> 	jmp	systimer_4
  2787                              <1> systimer_21:	; 23/07/2022
  2788 0000D5F9 88DA                <1> 	mov	dl, bl
  2789 0000D5FB FECA                <1> 	dec	dl  ; 16 -> 15 ... 1 -> 0 
  2790 0000D5FD C0E204              <1> 	shl	dl, 4 ; * 16
  2791 0000D600 0FB6FA              <1> 	movzx	edi, dl
  2792 0000D603 01F7                <1> 	add	edi, esi ; timer_set 
  2793                              <1> 	
  2794 0000D605 3A07                <1> 	cmp	al, [edi] ; process number
  2795                              <1>         ;jne	systimer_4
  2796                              <1> 	; 23/07/2022
  2797 0000D607 75EB                <1> 	jne	short systimer_20 ; jmp systimer_4
  2798                              <1> 	
  2799                              <1> 	; same process ID
  2800 0000D609 FA                  <1> 	cli	; disable interrupts
  2801                              <1>  	; 10/06/2016 ; 02/01/2017
  2802                              <1> 	;mov	byte [edi], 0 
  2803 0000D60A 66C7070000          <1> 	mov	word [edi], 0 ; clear
  2804                              <1> 	;mov	dword [edi+12], 0 ; clear
  2805 0000D60F FE0D[D7830100]      <1> 	dec	byte [timer_events]
  2806 0000D615 EBB6                <1> 	jmp	short systimer_12
  2807                              <1> 
  2808                              <1> sysvideo: ; VIDEO DATA TRANSFER FUNCTIONS
  2809                              <1> 	; 11/08/2022
  2810                              <1> 	; 08/08/2022
  2811                              <1> 	; 23/07/2022 (TRDOS 386 v2.0.5)
  2812                              <1> 	; 06/03/2021
  2813                              <1> 	; 02/03/2021
  2814                              <1> 	; 28/02/2021
  2815                              <1> 	; 27/02/2021
  2816                              <1> 	; 26/02/2021
  2817                              <1> 	; 25/02/2021
  2818                              <1> 	; 21/02/2021, 22/02/2021, 23/02/2021
  2819                              <1> 	; 15/02/2021, 16/02/2021, 18/02/2021
  2820                              <1> 	; 10/02/2021, 11/02/2021, 12/02/2021
  2821                              <1> 	; 07/02/2021, 08/02/2021
  2822                              <1> 	; 01/02/2021, 02/02/2021, 05/02/2021
  2823                              <1> 	; 29/01/2021, 30/01/2021, 31/01/2021
  2824                              <1> 	; 23/01/2021, 24/01/2021, 28/01/2021
  2825                              <1> 	; 18/01/2021, 19/01/2021, 22/01/2021
  2826                              <1> 	; 04/01/2021, 10/01/2021, 11/01/2021
  2827                              <1> 	; 01/01/2021, 02/01/2021, 03/01/2021
  2828                              <1> 	; 28/12/2020, 29/12/2020, 30/12/2020
  2829                              <1> 	; 25/12/2020, 26/12/2020
  2830                              <1> 	; 21/12/2020, 23/12/2020
  2831                              <1> 	; 12/12/2020, 14/12/2020
  2832                              <1> 	; 10/12/2020, 11/12/2020
  2833                              <1> 	; 03/12/2020, 04/12/2020
  2834                              <1> 	; 22/11/2020, 23/11/2020
  2835                              <1> 	; 21/11/2020 (TRDOS 386 v2.0.3)
  2836                              <1> 	; 12/05/2017
  2837                              <1> 	; 11/07/2016
  2838                              <1> 	; 13/06/2016
  2839                              <1> 	; 16/05/2016 - TRDOS 386 (TRDOS v2.0)
  2840                              <1> 	;
  2841                              <1> 	; VIDEO DATA TRANSFER FUNCTIONS:
  2842                              <1> 	;
  2843                              <1> 	; Inputs:
  2844                              <1> 	;		; 07/02/2021
  2845                              <1> 	;	BH = 0 = VIDEO BIOS Mode 3, tty/text mode data transfers
  2846                              <1> 	;	     BL = 
  2847                              <1> 	;		Bits 0&1, Transfer direction
  2848                              <1> 	;	     	 	0 - System to system
  2849                              <1> 	;			1 - User to system
  2850                              <1> 	;			2 - System to user
  2851                              <1> 	;			3 - Exhange (Swap) - 28/01/2021
  2852                              <1> 	;		Bits 2, Transfer Type
  2853                              <1> 	;			0 - Display page (complete) transfer
  2854                              <1> 	;	     		1 - Display page window (col,row) transfer
  2855                              <1> 	;		; 28/01/2021
  2856                              <1> 	;		Bits 3..7 - Reserved, undefined (must be 0)
  2857                              <1> 	;	        ; 28/01/2021	
  2858                              <1> 	;	     /// BL = 0 -> System to system (display page) transfer
  2859                              <1> 	;		 CL = Source page (0FFh = current video page)
  2860                              <1> 	;		 DL = Destination page (0FFh = current video page)
  2861                              <1> 	;		 (Note: Nothing to do if src & dest are same page)
  2862                              <1> 	;	     /// BL = 1&2 -> user to system & system to user transfer
  2863                              <1> 	;		 ECX = User's buffer address
  2864                              <1> 	;		 DL = Video page (0FFh = current video page)
  2865                              <1> 	;	     /// BL = 3 -> exchange (swap) display page ; 28/01/2021
  2866                              <1> 	;		 ECX = User's buffer address
  2867                              <1> 	;		 DL = Video page (0FFh = current video page)
  2868                              <1> 	;		 EDI = Swap address in user's memory (must be > 0)
  2869                              <1> 	;	     /// BL = 5&6&7 -> user to system, system to user transfer 
  2870                              <1> 	;		(system window is in current/active display page)
  2871                              <1> 	;		 ESI = User's buffer address
  2872                              <1> 	;		 ECX Low 16 bits = Top left column (X1 position)
  2873                              <1> 	;		 ECX High 16 bits = Top row (Y1 position)
  2874                              <1> 	;		 EDX Low 16 bits = Bottom right column (X2 position)
  2875                              <1> 	;		 EDX High 16 bits = Bottom row (Y2 position)
  2876                              <1>         ;                If BL = 5 or BL bit 0 & bit 1 are 1 ; 28/01/2021
  2877                              <1> 	;		 EDI = Swap address (in user's memory space)
  2878                              <1> 	;		 (If swap address > 0, previous content of the window
  2879                              <1> 	;		 will be saved into swap area in user's memory space)
  2880                              <1> 	;	     /// BL = 4 -> system to system transfer
  2881                              <1> 	;		 ESI = System's source buffer (video page) address
  2882                              <1> 	;		 ECX Low 16 bits = Top left column (X1 position)
  2883                              <1> 	;		 ECX High 16 bits = Top row (Y1 position)
  2884                              <1> 	;		 EDX Low 16 bits = Bottom right column (X2 position)
  2885                              <1> 	;		 EDX High 16 bits = Bottom row (Y2 position)
  2886                              <1> 	;		 EDI = System's destination buffer (video page) addr
  2887                              <1> 	;
  2888                              <1> 	;		; 06/02/2021
  2889                              <1> 	;		; 05/02/2021
  2890                              <1> 	;		; 01/02/2021, 02/02/2021
  2891                              <1> 	;		; 30/01/2021, 31/02/2021
  2892                              <1> 	;		; 29/01/2021 (major modification)
  2893                              <1> 	;		; 23/11/2020 (major modification)
  2894                              <1> 	;		; 22/11/2020 (bugfixes and extensions)
  2895                              <1> 	;	BH = 1 = VGA Graphics (0A0000h) data transfers
  2896                              <1> 	;		BL bit 7
  2897                              <1> 	;		   resolution (screen width) option
  2898                              <1> 	;		   0 = 320 pixels
  2899                              <1> 	;		   1 = 640 pixels
  2900                              <1> 	;		.. followings are same with SVGA transfer function
  2901                              <1> 	;		BL bit 6
  2902                              <1> 	;		   direction option
  2903                              <1> 	;		   0 = user to system (video memory)
  2904                              <1> 	;		   1 = system to user
  2905                              <1> 	;		BL bit 5
  2906                              <1> 	;		   masked/direct (non-masked) operations
  2907                              <1> 	;		   1 = masked, 0 = non-masked (direct)
  2908                              <1> 	;		BL bit 4
  2909                              <1> 	;		   page/window option
  2910                              <1> 	;		   1 = window, 0 = display page (screen)
  2911                              <1> 	;		BL bit 0 to 3 (pixel operation types)
  2912                              <1> 	;		   0 = Copy pixels (colors) ((mask color))
  2913                              <1> 	;		   1 = Change (New, Fill) color
  2914                              <1> 	;		   2 = Add color
  2915                              <1> 	;		   3 = Sub color
  2916                              <1> 	;		   4 = OR color
  2917                              <1> 	;		   5 = AND color
  2918                              <1> 	;		   6 = XOR color
  2919                              <1> 	;		   7 = NOT color
  2920                              <1> 	;		   8 = NEG color
  2921                              <1> 	;		   9 = INC color
  2922                              <1> 	;		  10 = DEC color
  2923                              <1> 	;		  11 = Mix (Average) colors
  2924                              <1> 	;		  12 = Replace pixel colors
  2925                              <1> 	;		  13 = Copy pixel block(s)
  2926                              <1> 	;		  14 = Write line(s)
  2927                              <1> 	;		  15 = Write character (font)
  2928                              <1> 	;
  2929                              <1> 	;	   Input Registers for pixel operations:
  2930                              <1> 	;		 Same with LFB data transfer function below
  2931                              <1> 	;
  2932                              <1> 	;		; 25/02/2021		
  2933                              <1> 	;		; 05/02/2021, 06/02/2021
  2934                              <1> 	;		; 01/02/2021, 02/02/2021
  2935                              <1> 	;		; 30/01/2021, 31/02/2021
  2936                              <1> 	; 		; 29/01/2021 (major modification)
  2937                              <1> 	;		; 23/11/2020 (major modification)
  2938                              <1> 	;		; 22/11/2020 (bugfixes and extensions)
  2939                              <1> 	;	BH = 2 = Super VGA, LINEAR FRAME BUFFER data transfers
  2940                              <1> 	;		BL bit 7
  2941                              <1> 	;		   unused (invalid), must be 0
  2942                              <1> 	;		BL bit 6
  2943                              <1> 	;		   direction option
  2944                              <1> 	;		   0 = user to system (video memory)
  2945                              <1> 	;		   1 = system to user
  2946                              <1> 	;		BL bit 5
  2947                              <1> 	;		   masked/direct (non-masked) operations
  2948                              <1> 	;		   1 = masked, 0 = non-masked (direct)
  2949                              <1> 	;		BL bit 4
  2950                              <1> 	;		   page/window option
  2951                              <1> 	;		   1 = window, 0 = display page (screen)
  2952                              <1> 	;		BL bit 0 to 3 (pixel operation types)
  2953                              <1> 	;		   0 = Copy pixels (colors) ((mask color))
  2954                              <1> 	;		   1 = Change (New, Fill) color
  2955                              <1> 	;		   2 = Add color
  2956                              <1> 	;		   3 = Sub color
  2957                              <1> 	;		   4 = OR color
  2958                              <1> 	;		   5 = AND color
  2959                              <1> 	;		   6 = XOR color
  2960                              <1> 	;		   7 = NOT color
  2961                              <1> 	;		   8 = NEG color
  2962                              <1> 	;		   9 = INC color
  2963                              <1> 	;		  10 = DEC color
  2964                              <1> 	;		  11 = Mix (Average) colors
  2965                              <1> 	;		  12 = Replace pixel colors
  2966                              <1> 	;		  13 = Copy pixel block(s)
  2967                              <1> 	;		  14 = Write line(s)
  2968                              <1> 	;		  15 = Write character (font)
  2969                              <1> 	;
  2970                              <1> 	;	   Note: If HW of EBX > 0, it is VESA VBE mode number
  2971                              <1> 	;		 otherwise, function will be applied
  2972                              <1> 	;		 to current (VESA VBE) video mode.
  2973                              <1> 	;		
  2974                              <1> 	;	   Input Registers for pixel operations:
  2975                              <1> 	;		-- user to system & system to system --
  2976                              <1> 	;		-- (BL = 0 to 0Fh) -- non-masked, screen --
  2977                              <1> 	;		-- (BL = 10h to 1Fh) -- non-masked, window --
  2978                              <1> 	;		-- (BL = 20h to 2Fh) -- masked, screen --
  2979                              <1> 	;		-- (BL = 30h to 3Fh) -- masked, window --
  2980                              <1> 	;		(*) window, (**) masked (***) sys to sys
  2981                              <1> 	;		for BL bit 0 to 3
  2982                              <1> 	;		00h: COPY PIXELS
  2983                              <1> 	;		  If BL bit 4 = 0 ; 21/02/2021
  2984                              <1> 	;		     full screen copy	
  2985                              <1>    	;		     ECX & EDX will not be used
  2986                              <1> 	;		    (user buffer must fit to display page)	  	
  2987                              <1> 	;		  If BL bit 4 = 1 ; 21/02/2021		
  2988                              <1> 	;		    ECX = start position (row, column) (*)
  2989                              <1> 	;			  (HW = row, CX = column)
  2990                              <1> 	;		    EDX = size (rows, colums) (*)
  2991                              <1> 	;			  (HW = rows, DX = columns)
  2992                              <1> 	;		          (0 -> invalid)
  2993                              <1> 	;		          (1 -> horizontal or vertical line)
  2994                              <1> 	;		    ESI = user's buffer address
  2995                              <1> 	;		    EDI = mask color (**) ; 25/02/2021
  2996                              <1> 	;			  (this color will be excluded)
  2997                              <1> 	;		01h: CHANGE PIXEL COLORS
  2998                              <1> 	;		02h: ADD PIXEL COLORS
  2999                              <1> 	;		03h: SUB PIXEL COLORS
  3000                              <1> 	;		04h: OR PIXEL COLORS
  3001                              <1> 	;		05h: AND PIXEL COLORS
  3002                              <1> 	;		06h: XOR PIXEL COLORS
  3003                              <1> 	;		0Bh: MIX PIXEL COLORS
  3004                              <1> 	;		     CL = color (8 bit, 256 colors)
  3005                              <1> 	;		    ECX = color (16 bit and true colors)
  3006                              <1> 	;		    EDX = start position (row, column) (*)
  3007                              <1> 	;			 (HW = row, DX = column)
  3008                              <1> 	;		    ESI = size (rows, colums) (*)
  3009                              <1> 	;			  (HW = rows, SI = columns)
  3010                              <1> 	;		    EDI = mask color (**) ; 25/02/2021
  3011                              <1> 	;			  (this color will be excluded)
  3012                              <1> 	;		07h: NOT PIXEL COLORS
  3013                              <1> 	;		08h: NEG PIXEL COLORS
  3014                              <1> 	;		09h: INC PIXEL COLORS
  3015                              <1> 	;		0Ah: DEC PIXEL COLORS
  3016                              <1> 	;		    ECX = start position (row, column) (*)
  3017                              <1> 	;			  (HW = row, CX = column)
  3018                              <1> 	;		    EDX = size (rows, colums) (*)
  3019                              <1> 	;			  (HW = rows, DX = columns)
  3020                              <1> 	;		          (0 -> invalid)
  3021                              <1> 	;		          (1 -> horizontal or vertical line)
  3022                              <1> 	;		    EDI = mask color (**) ; 25/02/2021
  3023                              <1> 	;			  (this color will be excluded)
  3024                              <1> 	;		0Ch: REPLACE PIXEL COLORS
  3025                              <1> 	;		     CL = current color (8 bit, 256 colors)
  3026                              <1> 	;		    ECX = current color (16 bit and true colors)
  3027                              <1> 	;		     DL = new color (8 bit, 256 colors)
  3028                              <1> 	;		    EDX = new color (16 bit and true colors)
  3029                              <1> 	;		    ESI = start position (row, column) (*)
  3030                              <1> 	;			  (HW = row, SI = column)
  3031                              <1> 	;		    EDI = size (rows, colums) (*)
  3032                              <1> 	;			  (HW = rows, DI = columns)
  3033                              <1> 	;		0Dh: COPY PIXEL BLOCK(S) -full screen-
  3034                              <1> 	;		   -If BL bit 5 is 0-
  3035                              <1> 	;		    ECX = start position (row, column) (*)
  3036                              <1> 	;			  (HW = row, CX = column)
  3037                              <1> 	;		    EDX = size (rows, colums) (*)
  3038                              <1> 	;			  (HW = rows, DX = columns)
  3039                              <1> 	;		          (0 -> invalid)
  3040                              <1> 	;		          (1 -> horizontal or vertical line)
  3041                              <1> 	;		    ESI = destination (row, column) (***)
  3042                              <1> 	;		   -If BL bit 5 is 1-
  3043                              <1> 	;	               CL = color (8 bit, 256 colors)
  3044                              <1> 	;		      ECX = color (16 bit and true colors)
  3045                              <1> 	;	   	      EDX = count of blocks (not bytes)
  3046                              <1> 	;			    (limit: 2048 blocks)
  3047                              <1> 	;		      ESI = user's buffer address 
  3048                              <1> 	;			  contains 64 bits block data
  3049                              <1> 	;			  BLOCK ADDRESS - (row, col), dword
  3050                              <1> 	;			  (first 32 bits)
  3051                              <1> 	;			  BLOCK SIZE - (rows, cols), dword
  3052                              <1> 	;			  (second 32 bits)
  3053                              <1> 	;		; 10/02/2021
  3054                              <1> 	;		0Eh: WRITE LINE(s) -full screen- 
  3055                              <1> 	;		   -If BL bit 5 is 0-	
  3056                              <1> 	; 		    CL = color (8 bit, 256 colors)
  3057                              <1> 	; 		   ECX = color (16 bit and true colors)
  3058                              <1> 	; 		    DX = low 12 bits - size (length)
  3059                              <1> 	;			 high 4 bits - direction or type
  3060                              <1> 	;			     0 - Horizontal line
  3061                              <1> 	;			     1 - Vertical line
  3062                              <1> 	;			   > 1 - undefined, invalid
  3063                              <1> 	; 		   ESI = start position (row, column)
  3064                              <1> 	;			 (HW = row, SI = column)
  3065                              <1> 	;		   -If BL bit 5 is 1-
  3066                              <1> 	;		     CL = color (8 bit, 256 colors)
  3067                              <1> 	;		    ECX = color (16 bit and true colors)
  3068                              <1> 	;		     DX = number of lines (in user buffer)
  3069                              <1> 	;			   (limit: 2048 lines)	
  3070                              <1> 	;		    ESI = user's buffer
  3071                              <1> 	;		          contains 64 bit data for lines
  3072                              <1> 	;			   START POINT: 32 bit (row, col)
  3073                              <1> 	;			   LENGTH: 32 bit
  3074                              <1> 	;			   high 16 bits - 0
  3075                              <1> 	;			   bit 0-11 - length
  3076                              <1> 	;			   bit 12-15 - type (length)
  3077                              <1> 	;		0Fh: WRITE CHARACTER (FONT)
  3078                              <1> 	;		     CL = char's color (8 bit, 256 colors)
  3079                              <1> 	;		    ECX = char's color (16 bit and true colors)
  3080                              <1> 	;		     DL = Character's ASCII code
  3081                              <1> 	;		     DH bit 0 -> font height
  3082                              <1> 	;			  0 -> 8x16 character font
  3083                              <1> 	;			  1 -> 8x8 character font
  3084                              <1> 	;		     DH bit 1 & 2 -> scale	
  3085                              <1> 	;			  0 = 1/1 (8 pixels per char row)
  3086                              <1> 	;			  1 = 2/1 (16 pixels per char row)
  3087                              <1> 	;			  2 = 3/1 (24 pixels per char row)
  3088                              <1> 	;			  3 = 4/1 (32 pixels per char row) 
  3089                              <1> 	;		     DH bit 6 -> [ufont] option (1 = use [ufont])
  3090                              <1> 	;		     If DH bit 7 = 1
  3091                              <1> 	;			 USER FONT (from user buffer)
  3092                              <1> 	;			    DL = 0 -> 8x8 (width: 1 byte per row)
  3093                              <1> 	;			    DL = 1 -> 8x16
  3094                              <1> 	;			    DL = 2 -> 16x16 (width: 2 bytes)
  3095                              <1> 	;			    DL = 3 -> 16x32
  3096                              <1> 	;			    DL = 4 -> 24x24 (width: 3 bytes)
  3097                              <1> 	;			    DL = 5 -> 24x48
  3098                              <1> 	;			    DL = 6 -> 32x32 (width: 4 bytes)
  3099                              <1> 	;			    DL = 7 -> 32x64
  3100                              <1> 	;			    DL > 7 -> invalid (unused)
  3101                              <1> 	;			 EDI = user's font buffer address
  3102                              <1> 	;			    (NOTE: byte order is as row0,row1,row2..)
  3103                              <1> 	; 		    ESI = start position (row, column) (*)
  3104                              <1> 	;			     (HW = row, SI = column)
  3105                              <1> 	;
  3106                              <1> 	;		-- system to user --
  3107                              <1> 	;		   BL (bit 0 to 7) 
  3108                              <1> 	;	 	40h: COPY PIXELS (full screen, display page)
  3109                              <1> 	;		    EDI = user's buffer address
  3110                              <1> 	;		41h: COPY PIXELS (window)
  3111                              <1> 	;		    ECX = start position (row, column) (*)
  3112                              <1> 	;			  (HW = row, CX = column)
  3113                              <1> 	;		    EDX = size (rows, colums) (*)
  3114                              <1> 	;			  (HW = rows, DX = columns)
  3115                              <1> 	;		          (<=1 -> horizontal or vertical line)
  3116                              <1> 	;		    EDI = user's buffer address
  3117                              <1> 	;
  3118                              <1> 	;		Example: (29/01/2021)
  3119                              <1> 	;		    ecx = 00400064h (start at row 64, column 100) 
  3120                              <1> 	;		    edx = 00320048h (size: 50 rows, 72 columns)
  3121                              <1> 	;				    (end at row 114, column 172)
  3122                              <1> 	;		    If video memory starts at 0A0000h
  3123                              <1> 	;		    and if resolution is 320x200 (256 colors) ..
  3124                              <1> 	;		    window start offset: (64*320)+100 = 20580
  3125                              <1> 	;		    window size: 16072 bytes (pixels) 
  3126                              <1> 	;		    window end offset: 20580+16072 = 36652
  3127                              <1> 	;		    window start address: 0A0000h+564h = 0A5064h
  3128                              <1> 	; Outputs:
  3129                              <1> 	;	EAX = transfer/byte count
  3130                              <1> 	;
  3131                              <1> 	;	NOTE: If the source or destination address passes out of
  3132                              <1> 	;	video pages (display memory limits), data will not be transferred
  3133                              <1> 	;	and EAX will return as 0.
  3134                              <1> 	;
  3135                              <1> 	; 08/02/2021
  3136                              <1> 	; 07/02/2021	
  3137                              <1> 	; 04/01/2021
  3138                              <1> 	; PIXEL READ/WRITE (in current/active video mode)
  3139                              <1> 	;
  3140                              <1> 	;	BH = 3 = Read/Write pixel(s) -for all graphics modes-
  3141                              <1> 	;	     BL = 
  3142                              <1> 	;		0 = Read pixel
  3143                              <1> 	;		1 = Write pixel
  3144                              <1> 	;	     	2 = swap pixel colors
  3145                              <1> 	;		3 = mix pixel colors
  3146                              <1> 	;	     29/01/2021	
  3147                              <1> 	;		4 = read pixels from user defined positions 
  3148                              <1> 	;		5 = write single color pixels to user defined positions
  3149                              <1> 	;		6 = write multi color pixels to user defined positions 
  3150                              <1> 	; 
  3151                              <1> 	;	      > 6 = invalid/unimplemented	
  3152                              <1> 	;	
  3153                              <1> 	;	     .. for BL = 0 to 5		
  3154                              <1> 	;	     CL = color for writing pixel(s) or
  3155                              <1>  	;	     ECX = color for writing pixel(s) in true color modes
  3156                              <1> 	;
  3157                              <1> 	;	     EDX = Offset from start of video memory (0A0000h)
  3158                              <1> 	;		   or start of linear frame buffer
  3159                              <1> 	;
  3160                              <1> 	;	     07/02/2021	
  3161                              <1> 	;	     .. for BL = 4
  3162                              <1> 	;	     EDI = user's destination buffer address for pixel colors 	
  3163                              <1> 	;	     29/01/2021
  3164                              <1> 	;	     .. for BL = 4 & 5		
  3165                              <1> 	;	     ESI = user's source buffer address for BL = 4 & 5
  3166                              <1> 	;	     (buffer contains dword offset positions for pixels)
  3167                              <1> 	;	     EDX = number of pixels
  3168                              <1> 	;	     .. for BL = 6	 		
  3169                              <1> 	;	     ESI = user's buffer address for BL = 6
  3170                              <1> 	;	     (buffer contains dword offset position and dword color
  3171                              <1> 	;	      value for each pixel)
  3172                              <1> 	;	     EDX = number of pixels  
  3173                              <1> 	;	
  3174                              <1> 	; Note:
  3175                              <1> 	;	Pixel read/write will be performed in current video mode. 
  3176                              <1> 	;	If [CRT_MODE] < 0FFh, 0A0000h will be used 
  3177                              <1> 	;	   as video memory and limit will be 65536
  3178                              <1> 	;	   (new/mix pixel color will be in CL)  	
  3179                              <1> 	;	if [CRT_MODE] = 0FFh (VESA VBE video mode)
  3180                              <1> 	;	   LFB base address will be used as video memory
  3181                              <1> 	;	   and limit will be video page size
  3182                              <1> 	;	   (new/mix pixel color will be in CL)  
  3183                              <1> 	;
  3184                              <1> 	; Outputs:
  3185                              <1> 	;	EAX = pixel color (according to BL and ECX input)
  3186                              <1> 	;	EAX = 0 (pixel color is 0 or there is an error)
  3187                              <1> 	;	     (BL will return as 0FFh if there is an error)
  3188                              <1> 	;	; 29/01/2021 	
  3189                              <1> 	;	EAX = number of pixels (for BL input = 4&5&6)
  3190                              <1> 	;
  3191                              <1> 	; DIRECT (STANDARD VGA/CGA) DISPLAY MEMORY ACCESS FUNCTIONS:
  3192                              <1> 	;
  3193                              <1> 	;	BH = 4 = CGA direct video memory (0B8000h, 32K) access
  3194                              <1> 	;		Page directory & page tables of the user's
  3195                              <1> 	;		program will be updated to direct access to
  3196                              <1> 	;		0B8000h (32K) video (CGA, color) memory; if
  3197                              <1> 	;		there is not a permission conflict or lock!  
  3198                              <1> 	;	        (User's program/process will have permission to
  3199                              <1> 	;		access locked display memory if the owner is
  3200                              <1> 	;		it's parent.)
  3201                              <1>         ;
  3202                              <1> 	;	    Screen width = 320	
  3203                              <1> 	;
  3204                              <1> 	;	BH = 5 = VGA direct video memory (0A0000h, 64K) access
  3205                              <1> 	;		Page directory & page tables of the user's
  3206                              <1> 	;		program will be updated to direct access to
  3207                              <1> 	;		0A0000h (64K) video (VGA) memory; if there is not
  3208                              <1> 	;		a permission conflict or lock!  
  3209                              <1> 	;	        (User's program/process will have permission to
  3210                              <1> 	;		access locked display memory if the owner is
  3211                              <1> 	;		it's parent.)
  3212                              <1> 	;	
  3213                              <1> 	;	    ; 23/11/2020		
  3214                              <1> 	;	    Screen width options = 320, 640, 800 
  3215                              <1> 	;			
  3216                              <1> 	; Outputs:
  3217                              <1> 	;	EAX = Display memory address for direct access
  3218                              <1> 	;	      0A0000h for VGA, 0B8000h for CGA	
  3219                              <1> 	;	(Display memory size: 32K for CGA, 64K for VGA)
  3220                              <1> 	; 	EAX = 0 if display page access permission has been denied.
  3221                              <1> 	;	      (Locked!) 	
  3222                              <1> 	;	      	 	
  3223                              <1> 	; LINEAR FRAME BUFFER ACCESS FUNCTIONS:
  3224                              <1> 	;
  3225                              <1> 	;	BH = 6 = Linear Frame Buffer direct video memory access
  3226                              <1> 	;
  3227                              <1> 	;		Page directory & page tables of the user's
  3228                              <1> 	;		program will be updated to direct access to
  3229                              <1> 	;		the configured LFB (Linear Frame Buffer) address,
  3230                              <1> 	;		if there is not a permission conflict or lock!  
  3231                              <1> 	;	        (User's program/process will have permission to
  3232                              <1> 	;		access locked display memory if the owner is
  3233                              <1> 	;		it's parent.)
  3234                              <1> 	;
  3235                              <1> 	;	   ; 10/12/2020
  3236                              <1> 	;	   BL = 0FFh -> Direct LFB access for current video mode
  3237                              <1> 	;	   BL = XXh < 0FFh -> Direct LFB access
  3238                              <1> 	; 			      for VESA video mode 1XXh	
  3239                              <1> 	;		
  3240                              <1> 	;		Return: EAX = Linear Frame Buffer address
  3241                              <1> 	;			(EAX = 0 -> error)
  3242                              <1> 	;		     If EAX > 0
  3243                              <1> 	;			EDX = Frame Buffer Size in bytes
  3244                              <1> 	;		         BH = Requested Video Mode - 100h
  3245                              <1> 	;		              (VESA VBE video modes)	
  3246                              <1> 	;		         BL = bits per pixel
  3247                              <1> 	;			      8 = 256 colors, 8
  3248                              <1> 	;		             16 = 65536 colors, 5-6(G)-5 
  3249                              <1> 	;		             24 = RGB, 16M colors, 8-8-8
  3250                              <1> 	;		             32 = RGB + alpha bytes, 8-8-8-8
  3251                              <1> 	;		     If BH = 0FFh
  3252                              <1> 	;		        BL = VGA/CGA video mode (also EAX = 0)
  3253                              <1> 	;
  3254                              <1> 	;		** Function will return with EAX = 0 if the mode
  3255                              <1> 	;		is not a valid VESA VBE video mode as 1??h ** 	
  3256                              <1> 	;
  3257                              <1> 	;		ECX = Pixel resolution
  3258                              <1> 	;		      CX = Width (320, 640, 800, 1024, 1366, 1920)
  3259                              <1> 	;		      High 16 bits of ECX = Height 
  3260                              <1> 	;
  3261                              <1> 	; 	23/11/2020
  3262                              <1> 	; ***	GET VIDEO MODE & LINEAR FRAME BUFFER INFO   
  3263                              <1> 	;	(This function -7- also is used for VGA and CGA modes)
  3264                              <1> 	; 	
  3265                              <1> 	;	BH = 7 = Get Linear Frame Buffer info
  3266                              <1> 	;
  3267                              <1> 	;	   ; 22/01/2021	
  3268                              <1> 	;	   ; 10/12/2020
  3269                              <1> 	;	   BL = any -not used- (22/01/2021)
  3270                              <1> 	;	
  3271                              <1> 	;		Return:
  3272                              <1> 	;		EAX = Frame Buffer Address (0 = is not in use)
  3273                              <1> 	;		EDX = Frame Buffer Size in bytes
  3274                              <1> 	;		 BH = Current Video Mode - 100h  ; 22/01/2021
  3275                              <1> 	;		     (VESA VBE video modes)	
  3276                              <1> 	;		 BL = bits per pixel
  3277                              <1> 	;			8 = 256 colors, 8
  3278                              <1> 	;		       16 = 65536 colors, 5-6(G)-5 
  3279                              <1> 	;		       24 = RGB, 16M colors, 8-8-8
  3280                              <1> 	;		       32 = RGB + alpha bytes, 8-8-8-8
  3281                              <1> 	;		If BH = 0FFh
  3282                              <1> 	;		   BL = VGA/CGA video mode (also EAX = 0)
  3283                              <1> 	;
  3284                              <1> 	;		Note:	
  3285                              <1> 	;		Alpha byte will be used as virtual color index.
  3286                              <1> 	;		(32 bit pixel colors.. byte 0,1,2 rgb and 3 alpha)
  3287                              <1> 	;
  3288                              <1> 	;		** Function will return with EAX = 0 if the mode
  3289                              <1> 	;		is not a valid VESA VBE video mode as 1??h ** 	
  3290                              <1> 	;
  3291                              <1> 	;		ECX = Pixel resolution
  3292                              <1> 	;		      CX = Width (320, 640, 800, 1024, 1366, 1920)
  3293                              <1> 	;		      High 16 bits of ECX = Height  
  3294                              <1> 	;
  3295                              <1> 	;	NOTE: Each process will have it's own frame buffer
  3296                              <1> 	;	      address and resolution parameters in 'u' area.
  3297                              <1> 	;	      Then, if the current frame buffer & resolution
  3298                              <1> 	;	      is different, frame buffer r/w functions
  3299                              <1> 	;	      will use scale factor to convert process's
  3300                              <1>         ;             pixel coordinates to actual screen coordinates.
  3301                              <1> 	;	      resolution -> dimensional scale
  3302                              <1> 	;	      color size -> color scale
  3303                              <1> 	;	     * RGB (TRUE) colors to 256 colors conversion:
  3304                              <1>         ;             TRUE Colors -> 8,8,8 (R,G,B; byte 0 is R)
  3305                              <1> 	;	      256 colors -> 2,2,2,2 (R,G,B,L; bit 0&1 is R)
  3306                              <1> 	; 		  bit 6&7 -> luminosity base level (0,1,2,3)
  3307                              <1> 	;		  bit 4&5 -> blue level (0,1,2,3)
  3308                              <1> 	;		  bit 2%3 -> green level (0,1,2,3)
  3309                              <1> 	;		  bit 0&1 -> red level (0,1,2,3)
  3310                              <1> 	;	      Example: total red level : luminosity + red level
  3311                              <1> 	;	      Luminosity base level: 0 -> 16
  3312                              <1> 	;		 		     1 -> 32
  3313                              <1> 	;				     2 -> 64
  3314                              <1> 	;				     3 -> 128
  3315                              <1> 	;	      Color level:	
  3316                              <1> 	;				    0 -> 0
  3317                              <1> 	;				    1 -> luminosity level
  3318                              <1> 	;				    2 -> luminosity level + 64
  3319                              <1> 	;				    3 -> 255
  3320                              <1> 	;	     Luminosity base level = min (R,G,B)
  3321                              <1> 	;			if it is <16, it will be set to 16
  3322                              <1> 	;	     Color levels: Color values are fixed to (nearest) 
  3323                              <1> 	;		   one of all possible set level (step) values
  3324                              <1> 	;		   (according to luminosity base level); then
  3325                              <1> 	;		   color levels are set to R-L, G-L, B-L.
  3326                              <1> 	;	 For example: If luminosity base level is 32
  3327                              <1> 	;		  all possible set values are 0, 32, 96, 255.
  3328                              <1> 	;
  3329                              <1> 	;	    * RGB (TRUE) colors to 16 colors conversion:
  3330                              <1> 	;	    16 colors: R,B,G,L bits (4 bits)
  3331                              <1> 	;	    	   If any one of R,G,B >= 128 L = 1	
  3332                              <1>  	;		   If max. value of (R,G,B) >= 32, it is 1
  3333                              <1> 	;		      else all color bits (R&G&B&L) are 0
  3334                              <1> 	;		   If the second value >= max. value / 2
  3335                              <1> 	;		      it is 1
  3336                              <1> 	;		   If the third value >= max. value / 2
  3337                              <1> 	;		      it is 1
  3338                              <1> 	;	    Example: R = 132, G = 64, B = 78
  3339                              <1> 	;		     L = 1, R = 1
  3340                              <1> 	;		     G < 66 --> G = 0
  3341                              <1> 	;		     B >= 66 --> B = 1
  3342                              <1> 	;
  3343                              <1> 	; 10/12/2020
  3344                              <1> 	; SET VIDEO MODE (& RETURN LFB INFO for VESA VBE VIDEO MODES)
  3345                              <1> 	;	
  3346                              <1> 	;	BH = 8 = Set Video Mode
  3347                              <1> 	;		
  3348                              <1> 	;		BL = Requested Video Mode (method)
  3349                              <1> 	;		If BL = 0FFh
  3350                              <1> 	;		   CX = VESA VBE Video Mode
  3351                              <1> 	;		   ; 11/12/2020
  3352                              <1> 	;		   If EDX > 0 -> LFB INFO (user) buffer addr
  3353                              <1> 	;		If BL < 0FFh, it is VGA/CGA video mode and
  3354                              <1> 	;			CX & EDX will not be used
  3355                              <1> 	;
  3356                              <1> 	;	    NOTE: The last VESA VBE video mode is 11Bh but
  3357                              <1> 	;	    TRDOS 386 will permit to set video mode upto 11Fh.
  3358                              <1> 	;	    Above 11Fh, from 140h to 1FEh, it will be accepted
  3359                              <1> 	;	    as Bochs/Plex86 emulator video mode and it will be
  3360                              <1> 	;	    used only if [vbe3] = 2 and detected
  3361                              <1> 	;	    video bios is BOCHS/PLEX86/QEMU/VIRTUALBOX vbios.
  3362                              <1> 	;	 	  	 		 	
  3363                              <1> 	; Outputs:
  3364                              <1> 	;	EAX = Requested (Proper) video mode number + 1
  3365                              <1> 	;	      ("dec eax" by user will give requested video mode),
  3366                              <1> 	;
  3367                              <1> 	;	If BL input is 0FFh
  3368                              <1> 	;	   EDX = LFBINFO table/structure (in user's buffer addr)
  3369                              <1> 	;	   EDX = 0 -> Invalid LFBINFO (do not use it)
  3370                              <1> 	;
  3371                              <1> 	;	EAX = 0 -> Error (but EDX will not be changed)
  3372                              <1> 	;
  3373                              <1> 	; 03/12/2020
  3374                              <1> 	; VESA VBE3 VIDEO BIOS (32 bit) PROTECTED MODE INTERFACE SETTINGS
  3375                              <1> 	;	
  3376                              <1> 	;	BH = 9 = set/get VBE3 Protected Mode Interface parameters
  3377                              <1> 	;		
  3378                              <1> 	;		BL = 0 - Disable protected mode interface
  3379                              <1> 	;			([pmi32] = 0)
  3380                              <1> 	;		 	Return: AL = 1	
  3381                              <1> 	;		BL = 1 - Enable protected mode Interface
  3382                              <1> 	;			([pmi32] = 1)
  3383                              <1> 	;			Return: AL = 2
  3384                              <1> 	;		BL = 2 - Get protected mode interface status
  3385                              <1> 	;			Return: AL = [pmi32] + 1 (AL = 1 or 2)
  3386                              <1> 	;
  3387                              <1> 	;		If [vbe3] <> 3 --> AL = 0
  3388                              <1> 	;
  3389                              <1> 	;		; 17/01/2021
  3390                              <1> 	;		BL = 3 - Disable/Cancel restore permission to user
  3391                              <1> 	;			Return: AL = 1 (if disabled) or 0
  3392                              <1> 	;		BL = 4 - Enable/Give restore permission to user
  3393                              <1> 	;			Return: AL = 2 (if enabled) or 0
  3394                              <1> 	;		BL = 5 - Get video state save/restore status
  3395                              <1> 	;			 (permission status)
  3396                              <1> 	;		        Return: AL = Status (enabled = 1)
  3397                              <1> 	;				; 22/01/2021
  3398                              <1> 	;				AH = state options ([srvso])
  3399                              <1> 	;		BL = 6 - Return VESA VBE number/status
  3400                              <1> 	;		        Return: AX = status
  3401                              <1> 	;			      if AH =  2, AL > 0 : Emulator
  3402                              <1> 	;				 AH =  3, VESA VBE3 video bios
  3403                              <1> 	;		; 28/02/2021 	 
  3404                              <1> 	;		BL = 7 - Set true color mode as 32bpp (default)
  3405                              <1> 	;			Return: AX = 32 (if VBE3) 
  3406                              <1> 	;		NOTE: Initial/default value is 32bpp for vbe3.
  3407                              <1> 	;			Return: AX = 0 -> error 	 
  3408                              <1> 	;		BL = 8 - Set true color mode as 24bpp (default)
  3409                              <1> 	;			Return: AX = 24
  3410                              <1> 	;			;Return: AX = 0 -> error 
  3411                              <1> 	;		BL = 9 - Return default/current true color mode
  3412                              <1> 	;			Return: AX = 32 (32 bpp)
  3413                              <1> 	;			Return: AX = 24 (24 bpp)
  3414                              <1> 	;			Return: AX = 0 -> error (not VESA bios)
  3415                              <1> 	;		 
  3416                              <1> 	;		BL > 9 : not implemented (28/02/2021)
  3417                              <1> 	;
  3418                              <1> 	;	; 19/01/2021 ([u.uid] check)	
  3419                              <1> 	;	Note: Enabling/Disabling are done by root ([u.uid] = 0)
  3420                              <1> 	;	      while [multi_tasking] = 0.
  3421                              <1> 	;
  3422                              <1>     	; 23/12/2020
  3423                              <1> 	; VIDEO MEMORY MAPPING:
  3424                              <1> 	;	BH = 10 = Map video memory to user's buffer
  3425                              <1> 	;
  3426                              <1> 	;	   BL = 0 : CGA memory (0B8000h) map (32K)
  3427                              <1> 	;	   BL = 1 : VGA memory (0A0000h) map (64K)
  3428                              <1> 	;	   BL = 2 : SVGA memory (LFB) map to user's buffer
  3429                              <1> 	;
  3430                              <1> 	;	ECX = User's buffer addr (low 12 bits will be cleared)
  3431                              <1> 	;	EDX = Buffer size in bytes (if BL = 2)
  3432                              <1> 	;		(will be trimmed if LFB size < EDX)
  3433                              <1> 	; Return:				
  3434                              <1>         ;	EAX = physical address of video memory (buffer)
  3435                              <1> 	;	EBX = mapped (actual) size of video memory (bytes)
  3436                              <1> 	;	ECX = virtual start address of user's video buffer 
  3437                              <1> 	;	EDX is same with EDX input
  3438                              <1> 	;
  3439                              <1> 	;	(Note: Memory page boundaries will be applied 
  3440                              <1> 	;	 to buffer size and buff start addr by rounding down.
  3441                              <1> 	;	 Rounded size & address values must not be zero.) 
  3442                              <1> 	;	-Normally, it is expected to request mapping by using
  3443                              <1> 	;	 correct buffer size of current or desired video mode-
  3444                              <1> 	;
  3445                              <1> 	;	EAX = 0 -> error ! memory can not mapped to user
  3446                              <1> 	;
  3447                              <1> 	; 04/01/2021
  3448                              <1> 	; SET/READ COLOR PALETTE (set/read DAC color registers)
  3449                              <1> 	;	((256 colors (8bpp) VGA/CGA video hardware feature))
  3450                              <1> 	;
  3451                              <1> 	;	BH = 11 = Set/Read DAC color registers
  3452                              <1> 	;
  3453                              <1> 	;	   (BL<4 Original method for std VGA video hardware)
  3454                              <1> 	;	   BL = 0 : Read all DAC color registers (256 colors)
  3455                              <1> 	;	       (6 bit colors, in RGB order)
  3456                              <1> 	;	   BL = 1 : Set all DAC color registers (256 colors)
  3457                              <1> 	;	       (6 bit colors, in RGB order)
  3458                              <1> 	;	   BL = 2 : Read single DAC color register
  3459                              <1> 	;	       (6 bit color, in RGB order)
  3460                              <1> 	;		((EAX will return with color value))
  3461                              <1> 	;		CL = DAC color register (index)
  3462                              <1> 	;	   BL = 3 : Set/Write single DAC color register
  3463                              <1> 	;	       (6 bit color, in RGB order, bit 6&7 are 0)
  3464                              <1> 	;		ECX byte 0 - DAC color register
  3465                              <1> 	;		ECX byte 1 - Red (6 bit)
  3466                              <1> 	;		ECX byte 2 - Green (6 bit)
  3467                              <1> 	;		ECX byte 3 - Blue (6 bit)
  3468                              <1> 	;	   (BL>3 Alternative method for BMP files etc.)	
  3469                              <1> 	;	   BL = 4 : Read all DAC color registers (256 colors)
  3470                              <1> 	;	       (8 bit colors, in BGR order, bit 0&1 is 0)
  3471                              <1> 	;	   BL = 5 : Set all DAC color registers (256 colors)
  3472                              <1> 	;	       (8 bit colors, in BGR order, bit 0&1 is 0)
  3473                              <1> 	;	   BL = 6 : Read single DAC color register
  3474                              <1> 	;	       (8 bit color, in BGR order, bit 0&1 is 0)
  3475                              <1> 	;		((EAX will return with color value))
  3476                              <1> 	;		CL = DAC color register (index)
  3477                              <1> 	;	   BL = 7 : Set/Write single DAC color register
  3478                              <1> 	;	       (8 bit color, bit 0&1 are 0)
  3479                              <1> 	;		ECX byte 0 - DAC color register
  3480                              <1> 	;		ECX byte 1 - Blue (8 bit)
  3481                              <1> 	;		ECX byte 2 - Green (8 bit)
  3482                              <1> 	;		ECX byte 3 - Red (8 bit)
  3483                              <1> 	;
  3484                              <1> 	;	  BL > 7 : invalid (not implemented)
  3485                              <1> 	;
  3486                              <1> 	;   if BL bit 2 is 1, 6 bit colors converted to 8 bit colors
  3487                              <1> 	;	(low two bits of color bytes will be 0)
  3488                              <1> 	;     ((color byte 00111111b will be converted to 11111100b))
  3489                              <1> 	;	and RGB byte order will be 
  3490                              <1> 	;		byte 0 - Blue (low 2 bits are 0)
  3491                              <1> 	;		byte 1 - Green (low 2 bits are 0)
  3492                              <1> 	;		byte 2 - Red (low 2 bits are 0)
  3493                              <1> 	;		byte 3 - pad (or zero byte)
  3494                              <1> 	;	and 256 colors buffer size must be 256*4 = 1024 bytes
  3495                              <1> 	;   if BL bit 2 is 0, 6 bit colors will be used directly
  3496                              <1> 	;	  (high two bits of 8 bit color bytes will be 0)
  3497                              <1> 	;     ((dac color 111111b will be converted to 00111111b))
  3498                              <1> 	;		byte 0 - Red (high 2 bits are 0)
  3499                              <1> 	;		byte 1 - Green (high 2 bits are 0)
  3500                              <1> 	;		byte 2 - Blue (high 2 bits are 0)
  3501                              <1> 	;	and 256 colors buffer size must be 256*3 = 768 bytes
  3502                              <1> 	;
  3503                              <1> 	;	ECX = User's buffer addr (256*3 = 768 bytes) or
  3504                              <1> 	;	      Color 
  3505                              <1> 	;
  3506                              <1> 	; Return:				
  3507                              <1>         ;	EAX = buffer size (for BL input = 0,1,4,5)
  3508                              <1> 	;	      or color value (for BL input = 2,3,6,7)
  3509                              <1> 	;
  3510                              <1> 	; 10/01/2021
  3511                              <1> 	; SET/READ FONT DATA
  3512                              <1> 	;
  3513                              <1> 	;	BH = 12 = Set/Read Character Font Data
  3514                              <1> 	;
  3515                              <1> 	;	   BL = 0 : Disable system font overwrite
  3516                              <1> 	;	   BL = 1 : Enable system font overwrite
  3517                              <1> 	;	   BL = 2 : Read system font 8x8
  3518                              <1> 	;	   BL = 3 : Read system font 8x14
  3519                              <1> 	;	   BL = 4 : Read system font 8x16
  3520                              <1> 	;	   BL = 5 : Read user defined font 8x8
  3521                              <1> 	;	   BL = 6 : Read user defined font 8x16
  3522                              <1> 	;	   BL = 7 : Write system font 8x8
  3523                              <1> 	;	   BL = 8 : Write system font 8x14
  3524                              <1> 	;	   BL = 9 : Write system font 8x16
  3525                              <1> 	;	   BL = 10 : Write user defined font 8x8
  3526                              <1> 	;	   BL = 11 : Write user defined font 8x16
  3527                              <1> 	;
  3528                              <1> 	;	  BL > 11 : invalid (not implemented)
  3529                              <1> 	;
  3530                              <1> 	;	For BL = 1 to 11
  3531                              <1> 	;	   ECX = number of characters (<= 256)
  3532                              <1> 	;	   EDX = first character (ascii code in DL)
  3533                              <1> 	;	   ESI = user's buffer address
  3534                              <1> 	;
  3535                              <1> 	; Return:				
  3536                              <1>         ;	EAX = number of characters (ecx input)
  3537                              <1> 	;	EAX = 0 -> error
  3538                              <1> 	;	(EAX = 256 for BL = 0 and 1 if successful)
  3539                              <1> 	;	
  3540                              <1> 	; Note: system font overwrite permission will be
  3541                              <1> 	;       given if [multi_tasking] = 0 
  3542                              <1> 	;	and [u.uid] = 0 (BL = 1) ; 19/01/2021
  3543                              <1> 	;       and if [ufont] bit 7 is 1 (BL = 7,8,9)
  3544                              <1> 	;
  3545                              <1> 	; 18/01/2021
  3546                              <1> 	; SAVE/RESTORE STANDARD VGA VIDEO STATE
  3547                              <1> 	;
  3548                              <1> 	;	BH = 13 = Save/Restore std VGA video state
  3549                              <1> 	;
  3550                              <1> 	;	   BL = 0 : Save VGA state (without DAC regs)
  3551                              <1> 	;		Return: EAX = VideoStateID (>0)
  3552                              <1> 	;			EAX = 0 (failed!)
  3553                              <1> 	;	       (size: 110 bytes for TRDOS 386 v2.0.3)
  3554                              <1> 	;	   BL = 1 : Restore VGA state (without DAC regs)
  3555                              <1> 	;		ECX = VideoStateID (to be verified)
  3556                              <1> 	;	        Return: EAX = Restore size (>0)
  3557                              <1> 	;	   BL = 2 : Save VGA state (complete)
  3558                              <1> 	;		Return: EAX = VideoStateID (>0)
  3559                              <1> 	;			EAX = 0 (failed!)
  3560                              <1> 	;	       (size: 882 bytes for TRDOS 386 v2.0.3) 
  3561                              <1> 	;	   BL = 3 : Restore VGA state (complete)
  3562                              <1> 	;		ECX = VideoStateID (to be verified)
  3563                              <1> 	;	        Return: EAX = Restore size (>0)
  3564                              <1> 	;
  3565                              <1> 	;	* Above options are for saving
  3566                              <1> 	;	*       video state to system memory
  3567                              <1> 	;	*	(location: VBE3VIDEOSTATE, 2048 bytes)
  3568                              <1> 	;	
  3569                              <1> 	;	   BL = 4 : Save VGA state (without DAC regs)
  3570                              <1> 	;		ECX = buffer address  
  3571                              <1> 	;		Return: EAX = transfer count
  3572                              <1> 	;	       (size: 110 bytes for TRDOS 386 v2.0.3)
  3573                              <1> 	;		ECX = buffer address  
  3574                              <1> 	;	   BL = 5 : Restore VGA state (without DAC regs)
  3575                              <1> 	;		ECX = buffer address  
  3576                              <1> 	;	        Return: EAX = transfer count
  3577                              <1> 	;	   BL = 6 : Save VGA state (complete)
  3578                              <1> 	;		ECX = buffer address  
  3579                              <1> 	;		Return: EAX = transfer count
  3580                              <1> 	;	       (size: 882 bytes for TRDOS 386 v2.0.3)
  3581                              <1> 	;	   BL = 7 : Restore VGA state (complete)
  3582                              <1> 	;		ECX = buffer address  
  3583                              <1> 	;	        Return: EAX = transfer count
  3584                              <1> 	;
  3585                              <1> 	;	* Above options are for saving
  3586                              <1> 	;	*       video state to user's buffer
  3587                              <1> 	;	*	(buffer size: 110 bytes or 882 bytes)
  3588                              <1> 	;
  3589                              <1> 	;	  BL > 7 : invalid (not implemented)
  3590                              <1> 	;
  3591                              <1> 	; 18/01/2021
  3592                              <1> 	; SAVE/RESTORE SUPER VGA (VESA VBE 2/3) VIDEO STATE
  3593                              <1> 	;
  3594                              <1> 	;	BH = 14 = Save/Restore SVGA video state
  3595                              <1> 	;
  3596                              <1> 	;	   BL = options
  3597                              <1> 	;		bit 0 - Save (0) or Restore (1)	
  3598                              <1> 	;		bit 1 - controller hardware state
  3599                              <1> 	;		bit 2 - BIOS data state
  3600                              <1> 	;		bit 3 - DAC state
  3601                              <1> 	;		bit 4 - (extended) Register state
  3602                              <1> 	;		bit 5 - system (0) or user (1) memory
  3603                              <1> 	;		bit 6 - verify without transfer
  3604                              <1> 	;		bit 7 - not used (must be 0)
  3605                              <1> 	;			
  3606                              <1> 	;	     if bit 0 = 0 and bit 5 = 0
  3607                              <1> 	;		Return:	EAX = VideoStateID (>0)	
  3608                              <1> 	;	     if bit 0 = 1
  3609                              <1> 	;		ECX = VideoStateID (bit 5 = 0)
  3610                              <1> 	;		Return: EAX = restore (transfer) size
  3611                              <1> 	;	     if bit 5 = 1
  3612                              <1> 	;		ECX = Buffer address
  3613                              <1> 	;		Return: EAX = transfer count (size)
  3614                              <1> 	;
  3615                              <1> 	;	     ECX = Buffer address or VideoStateID
  3616                              <1> 	;
  3617                              <1> 	;	  BL > 127 : invalid (not implemented)
  3618                              <1> 	;
  3619                              <1> 	;  Note: Required buffer size may be > 2048 bytes
  3620                              <1> 	;	 (function fails when buff size > 2048 bytes)
  3621                              <1> 	;	 proper option must be used
  3622                              <1> 	;
  3623                              <1> 	; 18/01/2021
  3624                              <1> 	; READ VESA EDID (EXTENDED DISPLAY IDENTIFICATION DATA)
  3625                              <1> 	;
  3626                              <1> 	;	BH = 15 = Read VESA EDID for connected monitor  
  3627                              <1> 	;		  (copy EDID to user)	
  3628                              <1> 	;
  3629                              <1> 	;	   BL = any
  3630                              <1> 	;
  3631                              <1> 	;	Input:
  3632                              <1> 	;	    ECX = user's (EDID) buffer address 
  3633                              <1> 	;		 (buffer size: 128 bytes)
  3634                              <1> 	;	Output:
  3635                              <1> 	;	    EAX = 128 (EDID size)
  3636                              <1> 	;	    or EAX = 0 -> Error!
  3637                              <1> 	;	       (EDID not ready or buffer addr error)	
  3638                              <1> 	;
  3639                              <1>  	
  3640                              <1> 	; 16/05/2016
  3641 0000D617 31C0                <1> 	xor	eax, eax
  3642 0000D619 A3[1C010300]        <1> 	mov	[u.r0], eax
  3643 0000D61E 20FF                <1> 	and	bh, bh
  3644                              <1> 	;jnz	sysvideo_13 ; 11/07/2016
  3645                              <1> 	; 23/07/2022
  3646 0000D620 7405                <1> 	jz	short sysvideo_40
  3647 0000D622 E974020000          <1> 	jmp	sysvideo_13
  3648                              <1> 
  3649                              <1> sysvideo_40:	; 23/07/2022
  3650                              <1> 	;; 21/11/2020 (TRDOS 386 v2.0.3)
  3651                              <1> 	;; tty/text mode transfers are only for video mode 3
  3652                              <1> 
  3653                              <1> 	; 22/11/2020
  3654                              <1> 	;cmp	byte [CRT_MODE], 3 ; 80x25 text, 16 colors
  3655                              <1> 	;jne	sysret ; invalid (nothing to do), [u.r0] = 0	
  3656                              <1> 	
  3657                              <1> 	; 23/11/2020
  3658                              <1> 	; bit 7,6,5,4 of BL are reserved and it must be 0
  3659                              <1> 	;	 	 for current 'sysvideo' version
  3660                              <1> 	;test	bl, 0F0h
  3661                              <1> 	;;jnz	sysret ; invalid (undefined) ! 
  3662                              <1> 	;; 28/01/2021
  3663                              <1> 	;jnz	short sysvideo_1_2 ; invalid (undefined) !
  3664                              <1> 	; 28/01/2021
  3665 0000D627 80FB07              <1> 	cmp	bl, 7
  3666 0000D62A 776E                <1> 	ja	short sysvideo_1_2 ; invalid (undefined) !	
  3667                              <1> 
  3668                              <1> 	; Video mode 0, 80*25 text mode, CGA 16 colors  
  3669                              <1> 	; [CRT_MODE] = 3
  3670                              <1> 	;mov	bh, bl
  3671                              <1> 	;shr	bh, 2 ; 4..7 -> 1, 8..11 -> 2, 12..15 -> 3
  3672                              <1> 	;; 21/11/2020
  3673                              <1> 	;;and	bh, bh
  3674                              <1>         ;jnz	sysvideo_4  ; Display page window transfer etc.
  3675                              <1> 
  3676                              <1> 	; 28/01/2021
  3677 0000D62C F6C304              <1> 	test	bl, 4 ; bit 2
  3678                              <1> 	;jnz	sysvideo_4 ; Display page window transfer
  3679                              <1> 	; 23/07/2022
  3680 0000D62F 7405                <1> 	jz	short sysvideo_41
  3681 0000D631 E9A1000000          <1> 	jmp	sysvideo_4
  3682                              <1> sysvideo_41:	; 23/07/2022
  3683                              <1> 	; Display page (complete) transfer
  3684 0000D636 80FA07              <1> 	cmp	dl, 7
  3685                              <1> 	;jnz	sysret ; invalid (nothing to do), [u.r0] = 0
  3686 0000D639 760A                <1> 	jna	short sysvideo_0 ; 28/01/2021	
  3687 0000D63B FEC2                <1> 	inc	dl ; 0FFh -> 0 ("use current video page")
  3688 0000D63D 755B                <1> 	jnz	short sysvideo_1_2  ; invalid
  3689                              <1> 	; dl = 0 -> use current current page
  3690 0000D63F 8A15[76770100]      <1> 	mov	dl, [ACTIVE_PAGE]
  3691                              <1> sysvideo_0:
  3692                              <1> 	; 28/01/2021 
  3693 0000D645 80FB03              <1> 	cmp	bl, 3
  3694 0000D648 7206                <1> 	jb	short sysvideo_0_0
  3695 0000D64A 09FF                <1> 	or	edi, edi
  3696 0000D64C 744C                <1> 	jz	short sysvideo_1_2  ; invalid
  3697 0000D64E 89FE                <1> 	mov	esi, edi ; save swap/exchange buffer addr
  3698                              <1> 	; ecx = user buffer for new video page content
  3699                              <1> 	; esi = user (swap) buffer for saving current video page  
  3700                              <1> sysvideo_0_0:
  3701 0000D650 BF00800B00          <1> 	mov	edi, 0B8000h
  3702                              <1> 	; dl = display page number, destination
  3703 0000D655 66B80010            <1> 	mov	ax, 4096 ; 21/11/2020
  3704 0000D659 20D2                <1> 	and	dl, dl
  3705 0000D65B 7408                <1> 	jz	short sysvideo_1
  3706                              <1> 	; 07/02/2021
  3707 0000D65D 88D6                <1> 	mov	dh, dl
  3708                              <1> sysvideo_0_1:
  3709                              <1> 	; page length = 4096 bytes (but page content is 80*25*2 bytes)
  3710 0000D65F 01C7                <1> 	add	edi, eax ; 21//11/2020 ([CRT_LEN] = 1000h for mode 3)
  3711 0000D661 FECE                <1> 	dec	dh
  3712 0000D663 75FA                <1> 	jnz	short sysvideo_0_1
  3713                              <1> sysvideo_1:	
  3714 0000D665 80E303              <1> 	and	bl, 3
  3715 0000D668 7535                <1> 	jnz	short sysvideo_2 ; user to system display page transfer
  3716                              <1> 	; system to system video page (content) transfer
  3717                              <1> 	; cl = display page number, source
  3718 0000D66A 80F907              <1> 	cmp	cl, 7
  3719                              <1> 	;ja	sysret ; invalid (nothing to do), [u.r0] = 0
  3720 0000D66D 760A                <1> 	jna	short sysvideo_1_0
  3721 0000D66F FEC1                <1> 	inc	cl ; 0FFh -> 0 ("use current video page")
  3722 0000D671 7527                <1> 	jnz	short sysvideo_1_2  ; invalid
  3723 0000D673 8A0D[76770100]      <1> 	mov	cl, [ACTIVE_PAGE]
  3724                              <1> sysvideo_1_0:
  3725                              <1> 	; 28/01/2021
  3726 0000D679 38D1                <1> 	cmp	cl, dl
  3727 0000D67B 741D                <1> 	je	short sysvideo_1_2  ; same video page !
  3728                              <1> 
  3729                              <1> 	; system to system video/display page transfer (mode 0)
  3730                              <1> 	; 21/11/2020
  3731                              <1> 	;mov	esi, 0B8000h
  3732                              <1> 	;movzx	eax, cl
  3733                              <1> 	;mov	edx, 4096 ; [CRT_LEN] = 1000h for video mode 3
  3734                              <1> 	;mov	ecx, edx
  3735                              <1> 	;mul	edx
  3736                              <1> 	;add	esi, eax
  3737                              <1> 	; 28/01/2021
  3738                              <1> 	;movzx	esi, cl
  3739                              <1> 	;shl	si, 12 ; * 4096
  3740                              <1> 	;add	esi, 0B8000h 
  3741                              <1> 	
  3742                              <1> 	; 28/01/2021
  3743 0000D67D A3[1C010300]        <1> 	mov	[u.r0], eax ; 4096
  3744 0000D682 BE00800B00          <1> 	mov	esi, 0B8000h
  3745 0000D687 08C9                <1> 	or	cl, cl
  3746 0000D689 7409                <1> 	jz	short sysvideo_1_1
  3747                              <1> 	; 07/02/2021
  3748                              <1> 	;mov	al, cl ; display/video page
  3749                              <1> 	;xor	ah, ah
  3750                              <1> 	;shl	ax, 12 ; * 4096
  3751                              <1> 	; 23/07/2022
  3752 0000D68B 30C0                <1>  	xor	al, al
  3753                              <1> 	;xor	eax, eax
  3754 0000D68D 88CC                <1> 	mov	ah, cl ; CL * 256
  3755 0000D68F C1E004              <1> 	shl	eax, 4 ; * 16 = CL * 4096
  3756 0000D692 01C6                <1> 	add	esi, eax
  3757                              <1> sysvideo_1_1:
  3758                              <1> 	; 21/11/2020
  3759                              <1> 	;;mov	ecx, 4096
  3760                              <1> 	;mov	ecx, eax ; 4096
  3761                              <1> 	;;mov	[u.r0], ecx ; 4096 bytes
  3762                              <1> 	; 28/01/2021	
  3763                              <1> 	;mov	[u.r0], cx
  3764 0000D694 31C9                <1> 	xor	ecx, ecx
  3765 0000D696 B504                <1> 	mov	ch, 4 ; mov ecx, 1024
  3766                              <1> 	;shr	cx, 2 ; / 4
  3767 0000D698 F3A5                <1> 	rep	movsd
  3768                              <1> sysvideo_1_2:
  3769 0000D69A E9D0F6FFFF          <1> 	jmp	sysret
  3770                              <1> sysvideo_2:  
  3771 0000D69F 80FB02              <1> 	cmp	bl, 2
  3772                              <1>         ;ja	sysret; invalid (user to user), [u.r0] = 0
  3773                              <1> 	; 28/01/2021
  3774 0000D6A2 7226                <1> 	jb	short sysvideo_3 ; user to system
  3775 0000D6A4 7404                <1> 	je	short sysvideo_2_0 ; system to user
  3776                              <1> 	; bl = 3
  3777 0000D6A6 89CA                <1> 	mov	edx, ecx ; save user's buffer addr
  3778 0000D6A8 89F1                <1> 	mov	ecx, esi ; save swap address
  3779                              <1> sysvideo_2_0:
  3780                              <1> 	; bl = 2 (or bl = 3, stage 1)
  3781                              <1> 	; system to user video/display page transfer (mode 0)
  3782 0000D6AA 89FE                <1> 	mov	esi, edi
  3783 0000D6AC 89CF                <1> 	mov	edi, ecx ; user buffer ; 28/01/2021
  3784                              <1> 	; 21/11/2020
  3785 0000D6AE 89C1                <1> 	mov	ecx, eax ; 4096
  3786 0000D6B0 E8F4360000          <1> 	call	transfer_to_user_buffer ; fast transfer
  3787                              <1> 	;jc	sysret ; [u.r0] = 0
  3788 0000D6B5 72E3                <1> 	jc	short sysvideo_1_2 ; 28/01/2021
  3789                              <1> 	; 28/01/2021
  3790 0000D6B7 80FB03              <1> 	cmp	bl, 3
  3791 0000D6BA 7408                <1> 	je	short sysvideo_2_2
  3792                              <1> sysvideo_2_1:
  3793                              <1> 	; 21/11/2020
  3794 0000D6BC 890D[1C010300]      <1> 	mov	[u.r0], ecx
  3795                              <1> 	;;mov	[u.r0], cx
  3796                              <1> 	;jmp	sysret
  3797 0000D6C2 EBD6                <1> 	jmp	short sysvideo_1_2
  3798                              <1> 
  3799                              <1> sysvideo_2_2:
  3800                              <1> 	; bl = 3 (exchange/swap) complete display page
  3801                              <1> 	; esi = video page start address
  3802                              <1> 	; edx = user's buffer address
  3803                              <1> 	
  3804                              <1> 	;mov	ecx, 4096
  3805 0000D6C4 89F7                <1> 	mov	edi, esi ; video page start address
  3806 0000D6C6 89D6                <1> 	mov	esi, edx ; user's (new page) buffer address
  3807 0000D6C8 EB04                <1> 	jmp	short sysvideo_2_3
  3808                              <1> sysvideo_3: 
  3809                              <1> 	; bl = 1 (or bl = 3, stage 2)
  3810                              <1> 	; user to system video/display page transfer (mode 0)	
  3811 0000D6CA 89CE                <1> 	mov	esi, ecx ; user buffer
  3812                              <1> 	; edi = video page address
  3813                              <1> 	; 21/11/2020
  3814 0000D6CC 89C1                <1> 	mov	ecx, eax ; 4096
  3815                              <1> sysvideo_2_3:
  3816 0000D6CE E820370000          <1> 	call	transfer_from_user_buffer ; fast transfer
  3817                              <1> 	;jc	sysret ; [u.r0] = 0
  3818 0000D6D3 72C5                <1> 	jc	short sysvideo_1_2 ; 28/01/2021
  3819 0000D6D5 EBE5                <1> 	jmp	short sysvideo_2_1
  3820                              <1> 
  3821                              <1> 	; 21/11/2020
  3822                              <1> 	;mov	[u.r0], ecx
  3823                              <1> 	;;mov	[u.r0], cx
  3824                              <1> 	;;jmp	sysret
  3825                              <1> 	;jmp	short sysvideo_1_2 ; 28/01/2021
  3826                              <1> 
  3827                              <1> sysvideo_4:
  3828                              <1> 	; 23/07/2022
  3829                              <1> 	; 23/11/2020 (TRDOS 386 v2.0.3)
  3830                              <1> 
  3831                              <1> 	; Display page window transfer etc.
  3832 0000D6D7 80E303              <1> 	and	bl, 3
  3833                              <1>         ;jnz	sysvideo_9 ; user to system or system to user
  3834                              <1> 	; 23/07/2022
  3835 0000D6DA 7405                <1> 	jz	short sysvideo_4_0
  3836 0000D6DC E9E3000000          <1> 	jmp	sysvideo_9
  3837                              <1> sysvideo_4_0:
  3838                              <1> 	; 21/11/2020
  3839                              <1> 	; system to system video/display page window transfer (mode 0)
  3840 0000D6E1 81FE00800B00        <1> 	cmp	esi, 0B8000h	; source buffer address (system)
  3841                              <1> 	;jb	sysret
  3842                              <1> 	; 23/07/2022
  3843 0000D6E7 7245                <1> 	jb	short sysvideo_4_3  ; jmp sysret
  3844 0000D6E9 81FE00000C00        <1> 	cmp	esi, 0B8000h+(4096*8)
  3845                              <1> 	; 23/07/2022
  3846                              <1> 	;jnb	sysret
  3847 0000D6EF 733D                <1> 	jnb	short sysvideo_4_3  ; jmp sysret
  3848 0000D6F1 81FF00800B00        <1> 	cmp	edi, 0B8000h	; destination buffer address (system)	
  3849                              <1> 	;jb	sysret
  3850                              <1> 	; 23/07/2022
  3851 0000D6F7 7235                <1> 	jb	short sysvideo_4_3  ; jmp sysret
  3852 0000D6F9 81FF00000C00        <1>         cmp     edi, 0B8000h+(4096*8)
  3853                              <1> 	; 23/07/2022
  3854                              <1> 	;jnb	sysret
  3855 0000D6FF 732D                <1> 	jnb	short sysvideo_4_3  ; jmp sysret
  3856                              <1> 	;
  3857 0000D701 51                  <1> 	push	ecx ; X1 and Y1 position - top left column, row
  3858 0000D702 0FB7C1              <1> 	movzx	eax, cx ; top left column
  3859                              <1> 	; 21/11/2020
  3860 0000D705 C1E910              <1> 	shr	ecx, 16 ; top row
  3861 0000D708 740E                <1> 	jz	short sysvideo_4_1 ; bypass following code
  3862 0000D70A 52                  <1> 	push	edx ; X2 and Y2 position - bottom right column, row
  3863 0000D70B 50                  <1> 	push	eax
  3864 0000D70C 66B8A000            <1> 	mov	ax, 80*2 ; 80 colums, 160 bytes per row
  3865 0000D710 F7E1                <1> 	mul	ecx
  3866                              <1> 		; eax = offset for start row number 
  3867 0000D712 01C6                <1> 	add	esi, eax
  3868 0000D714 01C7                <1> 	add	edi, eax
  3869 0000D716 58                  <1> 	pop	eax
  3870 0000D717 5A                  <1> 	pop	edx
  3871                              <1> sysvideo_4_1:
  3872                              <1> 	;shl	ax, 1 ; * 2 ; convert start column number to offset
  3873                              <1> 	; 23/07/2022
  3874 0000D718 D1E0                <1> 	shl	eax, 1
  3875 0000D71A 7404                <1> 	jz	short sysvideo_4_2	
  3876 0000D71C 01C6                <1> 	add	esi, eax
  3877 0000D71E 01C7                <1> 	add	edi, eax
  3878                              <1> 		; esi = source page window start offset
  3879                              <1> 		; edi = destination page window start offset
  3880                              <1> sysvideo_4_2:
  3881 0000D720 59                  <1> 	pop	ecx
  3882                              <1> 	;mov	eax, 0B8000h+(80*25*2*8)
  3883                              <1> 	; 21/11/2020
  3884 0000D721 B800000C00          <1> 	mov	eax, 0B8000h+(4096*8)
  3885 0000D726 39C6                <1> 	cmp	esi, eax
  3886                              <1> 	;jnb	sysret ; out of video page
  3887                              <1> 	; 23/07/2022
  3888 0000D728 7304                <1> 	jnb	short sysvideo_4_3  ; jmp sysret
  3889 0000D72A 39C6                <1> 	cmp	esi, eax
  3890                              <1> 	;jnb	sysret  ;out of video page
  3891                              <1> 	; 23/07/2022
  3892 0000D72C 7205                <1> 	jb	short sysvideo_4_4
  3893                              <1> sysvideo_4_3:
  3894 0000D72E E93CF6FFFF          <1> 	jmp	sysret
  3895                              <1> sysvideo_4_4:
  3896 0000D733 56                  <1> 	push	esi ; ****
  3897 0000D734 57                  <1> 	push	edi ; ***
  3898 0000D735 52                  <1> 	push	edx ; **
  3899 0000D736 51                  <1> 	push	ecx ; *
  3900 0000D737 C1E910              <1> 	shr	ecx, 16 ; top row
  3901 0000D73A C1EA10              <1> 	shr	edx, 16 ; bottom row
  3902                              <1> 	; 21/11/2020
  3903                              <1> 	;cmp	ecx, 24 ; max. 25 rows
  3904 0000D73D 6683F918            <1> 	cmp	cx, 24
  3905 0000D741 7778                <1> 	ja	short sysvideo_6 ; invalid, [u.r0] = 0
  3906                              <1> 	;cmp	edx, 24 ; max. 25 rows
  3907 0000D743 6683FA18            <1> 	cmp	dx, 24
  3908 0000D747 7772                <1> 	ja	short sysvideo_6 ; invalid, [u.r0] = 0		
  3909 0000D749 28CA                <1> 	sub	dl, cl ; end >= start
  3910 0000D74B 726E                <1> 	jc	short sysvideo_6 ; invalid, [u.r0] = 0
  3911                              <1> 	; 21/11/2020
  3912 0000D74D 89D3                <1> 	mov	ebx, edx ; row count - 1
  3913 0000D74F 7415                <1> 	jz	short sysvideo_4_5
  3914 0000D751 50                  <1> 	push	eax ; *****
  3915 0000D752 B8A0000000          <1> 	mov	eax, 80*2 ; bytes per row
  3916 0000D757 F7E3                <1> 	mul	ebx ; 21/11/2020
  3917                              <1> 		; eax = window end offset 
  3918                              <1> 		; (for the last row, before adding column bytes)
  3919 0000D759 01C6                <1> 	add	esi, eax
  3920 0000D75B 01C7                <1> 	add	edi, eax
  3921 0000D75D 58                  <1> 	pop	eax ; ***** ; mode 3 video memory end (0C000h)
  3922 0000D75E 39C6                <1> 	cmp	esi, eax
  3923                              <1> 	;ja	short sysvideo_6 ; invalid, [u.r0] = 0
  3924 0000D760 7359                <1> 	jnb	short sysvideo_6 ; 21/11/2020
  3925 0000D762 39C7                <1> 	cmp	edi, eax
  3926                              <1> 	;ja	short sysvideo_6 ; invalid, [u.r0] = 0
  3927 0000D764 7355                <1> 	jnb	short sysvideo_6 ; 21/11/2020
  3928                              <1> sysvideo_4_5:
  3929 0000D766 59                  <1> 	pop	ecx ; *
  3930 0000D767 5A                  <1> 	pop	edx ; **
  3931 0000D768 81E1FFFF0000        <1> 	and	ecx, 0FFFFh
  3932 0000D76E 81E2FFFF0000        <1> 	and	edx, 0FFFFh
  3933                              <1> 	; 21/11/2020
  3934                              <1> 	;cmp	ecx, 79 ; max. 80 columns
  3935 0000D774 6683F94F            <1> 	cmp	cx, 79
  3936 0000D778 7743                <1> 	ja	short sysvideo_7 ; invalid, [u.r0] = 0
  3937                              <1> 	;cmp	edx, 79 ; max. 80 columns
  3938 0000D77A 6683FA4F            <1> 	cmp	dx, 79 
  3939 0000D77E 773D                <1> 	ja	short sysvideo_7 ; invalid, [u.r0] = 0
  3940 0000D780 28CA                <1> 	sub	dl, cl
  3941 0000D782 7639                <1> 	jna	short sysvideo_7 ; invalid, [u.r0] = 0
  3942                              <1> 	; 21/11/2020
  3943 0000D784 740E                <1> 	jz	short sysvideo_4_6 
  3944                              <1> 	; edx = column count (width) - 1
  3945 0000D786 D0E2                <1> 	shl	dl, 1 ; * 2 ; byte offset (in end row)
  3946 0000D788 01D6                <1> 	add	esi, edx
  3947 0000D78A 01D7                <1> 	add	edi, edx
  3948                              <1> 		; esi = source page window end offset
  3949                              <1> 		; edi = destination page window end offset
  3950 0000D78C 39C6                <1> 	cmp	esi, eax ; video memory end
  3951                              <1> 	;ja	short sysvideo_7
  3952 0000D78E 732D                <1> 	jnb	short sysvideo_7 ; 21/11/2020
  3953 0000D790 39C7                <1> 	cmp	edi, eax ; video memory end
  3954                              <1> 	;ja	short sysvideo_7
  3955 0000D792 7329                <1> 	jnb	short sysvideo_7 ; 21/11/2020
  3956                              <1> sysvideo_4_6:
  3957 0000D794 5F                  <1> 	pop	edi ; ***
  3958 0000D795 5E                  <1> 	pop	esi ; ****
  3959 0000D796 FEC3                <1> 	inc	bl ; row count - 1 -> row count	
  3960 0000D798 FEC2                <1> 	inc	dl ; column count
  3961 0000D79A 88D7                <1> 	mov	bh, dl
  3962 0000D79C D0E2                <1> 	shl	dl, 1 ; convert column count to byte offset
  3963                              <1> 	; 21/11/2020
  3964                              <1> 	; esi = source page window start offset
  3965                              <1> 	; edi = destination page window start offset
  3966 0000D79E B8A0000000          <1> 	mov	eax, 80*2 ; bytes per row
  3967                              <1> 	; Note: 160 bytes per row (even if move count < 160)
  3968                              <1> sysvideo_5:	
  3969 0000D7A3 88F9                <1> 	mov	cl, bh ; move/transfer -word- count per row
  3970 0000D7A5 0115[1C010300]      <1> 	add	[u.r0], edx ; transfer count in bytes
  3971 0000D7AB F366A5              <1> 	rep	movsw
  3972 0000D7AE 01C6                <1> 	add	esi, eax ; + 160 bytes to next row
  3973 0000D7B0 01C7                <1> 	add	edi, eax ; + 160 bytes to next row
  3974 0000D7B2 FECB                <1> 	dec	bl ; remain count of rows
  3975 0000D7B4 75ED                <1> 	jnz	short sysvideo_5
  3976 0000D7B6 E9B4F5FFFF          <1> 	jmp	sysret
  3977                              <1> 
  3978                              <1> sysvideo_6:
  3979 0000D7BB 59                  <1> 	pop	ecx ; *
  3980 0000D7BC 5A                  <1> 	pop	edx ; **
  3981                              <1> sysvideo_7:	
  3982 0000D7BD 5F                  <1> 	pop	edi ; ***
  3983 0000D7BE 5E                  <1> 	pop	esi ; ****
  3984                              <1> sysvideo_8:
  3985 0000D7BF E9ABF5FFFF          <1> 	jmp	sysret
  3986                              <1> 
  3987                              <1> sysvideo_9:
  3988                              <1> 	; user to system or system to user window transfer
  3989                              <1> 	; 28/01/2021 (bl = 3 -> swap/exchange)
  3990                              <1> 	;cmp	bl, 2
  3991                              <1> 	;;ja	sysret	; user to user transfer is invalid
  3992                              <1> 	;		; [u.r0] = 0
  3993                              <1> 	;ja	short sysvideo_8 ; 26/12/2020
  3994                              <1> 
  3995                              <1> 	; 28/01/2021
  3996 0000D7C4 80FB02              <1> 	cmp	bl, 2
  3997 0000D7C7 7604                <1> 	jna	short sysvideo_9_8 
  3998                              <1> 
  3999                              <1> 	; swap/ exchange video memory and user mem windows
  4000                              <1> 	; edi = swap address in user's memory space
  4001 0000D7C9 21FF                <1> 	and	edi, edi
  4002 0000D7CB 74F2                <1> 	jz	short sysvideo_8 ; invalid ; 28/01/2021
  4003                              <1>  
  4004                              <1> sysvideo_9_8:		
  4005 0000D7CD 56                  <1> 	push	esi ; ****
  4006 0000D7CE 57                  <1> 	push	edi ; ***
  4007 0000D7CF 52                  <1> 	push	edx ; **
  4008 0000D7D0 51                  <1> 	push	ecx ; *
  4009                              <1> 
  4010 0000D7D1 C1E910              <1> 	shr	ecx, 16 ; top row
  4011 0000D7D4 C1EA10              <1> 	shr	edx, 16 ; bottom row
  4012                              <1> 	
  4013                              <1> 	; 21/11/2020
  4014                              <1> 	;cmp	ecx, 24 ; max. 25 rows
  4015 0000D7D7 6683F918            <1> 	cmp	cx, 24
  4016 0000D7DB 77DE                <1> 	ja	short sysvideo_6 ; invalid, [u.r0] = 0
  4017                              <1> 	;cmp	edx, 24 ; max. 25 rows
  4018 0000D7DD 6683FA18            <1> 	cmp	dx, 24
  4019 0000D7E1 77D8                <1> 	ja	short sysvideo_6 ; invalid, [u.r0] = 0	
  4020 0000D7E3 28CA                <1> 	sub	dl, cl
  4021 0000D7E5 72D4                <1> 	jc	short sysvideo_6 ; invalid, [u.r0] = 0
  4022                              <1> 
  4023                              <1> 	;mov	ch, cl ; top row
  4024                              <1> 	;mov	cl, [ACTIVE_PAGE]
  4025                              <1> 
  4026                              <1> 	;mov	edi, 80*25*2 ; 4000
  4027                              <1> 	; 21/11/2020
  4028                              <1> 	;mov	edi, 4096 ; [CRT_LEN = 4096 for video mode 3 
  4029                              <1> 	;shl	edi, cl  ; ! wrong for page 2 to page 7 !
  4030                              <1> 	;;add	edi, 0B8000h - 80*25*2
  4031                              <1> 	;add	edi, 0B8000h - 1000h ; - 4096
  4032                              <1> 	
  4033                              <1> 	; 21/11/2020
  4034                              <1> 	;xor	eax, eax
  4035                              <1> 	;mov	edi, 0B8000h
  4036                              <1> 	;and	cl, cl ; is video page = 0 ?
  4037                              <1> 	;jz	short sysvideo_9_1 ; yes
  4038                              <1> 	; eax = 0
  4039                              <1> 
  4040                              <1> ;sysvideo_9_0:
  4041                              <1> 	;add	ax, 4096
  4042                              <1> 	;dec	cl
  4043                              <1> 	;jnz	short sysvideo_9_0
  4044                              <1> 	;add	edi, eax
  4045                              <1> 	;	; edi = video page start address
  4046                              <1> 
  4047                              <1> 	; 21/11/2020
  4048 0000D7E7 BF00800B00          <1> 	mov	edi, 0B8000h
  4049 0000D7EC 803D[76770100]00    <1> 	cmp	byte [ACTIVE_PAGE], 0
  4050 0000D7F3 760C                <1> 	jna	short sysvideo_9_1
  4051                              <1> stsvideo_9_0:
  4052 0000D7F5 B010                <1> 	mov	al, 16 ; 4096/256
  4053 0000D7F7 F625[76770100]      <1> 	mul	byte [ACTIVE_PAGE] 
  4054 0000D7FD 86E0                <1> 	xchg	ah, al ; * 256
  4055 0000D7FF 01C7                <1> 	add	edi, eax
  4056                              <1> 		; edi = video page start address
  4057                              <1> sysvideo_9_1:
  4058                              <1> 	; bl = transfer direction 
  4059                              <1> 	;     (1 = from user, 2 = to user)
  4060                              <1> 	;     (3 = swap) ; 28/01/2021
  4061 0000D801 88D7                <1> 	mov	bh, dl ; row count - 1
  4062                              <1> 	;mov	dl, ch ; top row
  4063                              <1> 	; 21/11/2020
  4064 0000D803 08C9                <1> 	or	cl, cl ; top row number
  4065 0000D805 7408                <1> 	jz	short sysvideo_9_2
  4066                              <1> 
  4067                              <1> 	;mov	eax, 80*2
  4068 0000D807 66B8A000            <1> 	mov	ax, 80*2 ; 160, bytes per row
  4069 0000D80B F7E1                <1> 	mul	ecx ; 22/11/2020
  4070 0000D80D 01C7                <1> 	add	edi, eax
  4071                              <1> 		; edi = window start address for top row
  4072                              <1> sysvideo_9_2:
  4073 0000D80F 59                  <1> 	pop	ecx ; *
  4074 0000D810 5A                  <1> 	pop	edx ; **
  4075 0000D811 81E1FFFF0000        <1> 	and	ecx, 0FFFFh
  4076 0000D817 81E2FFFF0000        <1> 	and	edx, 0FFFFh
  4077                              <1> 	; 21/11/2020
  4078                              <1> 	;cmp	ecx, 79 ; max. 80 columns
  4079 0000D81D 6683F94F            <1> 	cmp	cx, 79
  4080 0000D821 779A                <1> 	ja	short sysvideo_7 ; invalid, [u.r0] = 0
  4081                              <1> 	;cmp	edx, 79 ; max. 80 columns
  4082 0000D823 6683FA4F            <1> 	cmp	dx, 79
  4083 0000D827 7794                <1> 	ja	short sysvideo_7 ; invalid, [u.r0] = 0
  4084                              <1> 	
  4085 0000D829 28CA                <1> 	sub	dl, cl
  4086 0000D82B 7290                <1> 	jc	short sysvideo_7 ; invalid, [u.r0] = 0
  4087                              <1> 	
  4088 0000D82D 08C9                <1> 	or	cl, cl ; left column 
  4089 0000D82F 7404                <1> 	jz	short sysvideo_9_3 ; 0
  4090                              <1> 
  4091                              <1> 	; 21/11/2020
  4092 0000D831 D0E1                <1> 	shl	cl, 1  ; column * 2
  4093 0000D833 01CF                <1> 	add	edi, ecx
  4094                              <1> 		; edi = window start addr for top left column
  4095                              <1> sysvideo_9_3:
  4096 0000D835 88D1                <1> 	mov	cl, dl
  4097 0000D837 FEC1                <1> 	inc	cl ; column count
  4098 0000D839 D0E1                <1> 	shl	cl, 1 ; column count * 2
  4099                              <1> 		; ecx = transfer count per row
  4100                              <1> 
  4101 0000D83B 58                  <1> 	pop	eax ; *** (swap address)
  4102 0000D83C 5E                  <1> 	pop	esi ; ****
  4103                              <1> 
  4104 0000D83D FEC7                <1> 	inc	bh  ; row count	
  4105                              <1> 	
  4106                              <1> 	;mov	edx, 80*2
  4107 0000D83F B2A0                <1> 	mov	dl, 80*2  ; bytes per row
  4108                              <1> 	;
  4109                              <1> 	;cmp	bl, 1 ; transfer direction
  4110                              <1> 	;ja	short sysvideo_11 ; system to user transfer
  4111                              <1> 	; 28/01/2021
  4112 0000D841 F6C301              <1> 	test	bl, 1
  4113 0000D844 7439                <1> 	jz	short sysvideo_11 ; system to user transfer
  4114                              <1> 
  4115                              <1> 	; user to system video/display page window transfer (mode 0)	
  4116 0000D846 21C0                <1> 	and	eax, eax ; swap address
  4117 0000D848 741B                <1> 	jz	short sysvideo_10 ; no window swap
  4118                              <1> sysvideo_9_7: ; 28/01/2021
  4119                              <1> 	; save previous window content in user's buffer (swap address)
  4120 0000D84A 56                  <1> 	push	esi ; user buffer
  4121 0000D84B 57                  <1> 	push	edi ; beginning address of the window
  4122                              <1> 	; 21/11/2020
  4123 0000D84C 53                  <1> 	push	ebx ; save bh
  4124 0000D84D 89FE                <1> 	mov	esi, edi
  4125 0000D84F 89C7                <1> 	mov	edi, eax
  4126                              <1> sysvideo_9_4:
  4127 0000D851 E853350000          <1> 	call	transfer_to_user_buffer ; fast transfer
  4128 0000D856 7208                <1> 	jc	short sysvideo_9_5
  4129                              <1> 	; ecx = actual transfer count (must be same with input)
  4130 0000D858 01D6                <1> 	add	esi, edx ; next row address of (video page) window 
  4131 0000D85A 01CF                <1> 	add	edi, ecx ; next row address of user's window
  4132                              <1> 		; Note: ecx may be less than row length of video page
  4133                              <1> 		; user's window uses offset according to window width
  4134 0000D85C FECF                <1> 	dec	bh
  4135 0000D85E 75F1                <1> 	jnz	short sysvideo_9_4 ; repeat for next row
  4136                              <1> sysvideo_9_5:
  4137 0000D860 5B                  <1> 	pop	ebx ; restore bh
  4138 0000D861 5F                  <1> 	pop	edi
  4139 0000D862 5E                  <1> 	pop	esi
  4140                              <1> 	;jnc	short sysvideo_10
  4141 0000D863 7215                <1> 	jc	short sysvideo_9_6 ; 28/01/2021
  4142                              <1> ;sysvideo_9_6:
  4143                              <1> ;	jmp	sysret ; [u.r0] = 0
  4144                              <1> 
  4145                              <1> sysvideo_10:
  4146                              <1> 	; user to system video/display page window transfer (mode 0)	
  4147                              <1> 	; esi =	user buffer
  4148 0000D865 E889350000          <1> 	call	transfer_from_user_buffer ; fast transfer
  4149                              <1> 	;jc	sysret
  4150 0000D86A 720E                <1> 	jc	short sysvideo_9_6 ; 28/01/2021
  4151                              <1> 	; ecx = actual transfer count (must be same with input)
  4152 0000D86C 010D[1C010300]      <1> 	add	[u.r0], ecx ; actual transfer count
  4153 0000D872 01D7                <1> 	add	edi, edx ; next row address of (video page) window 
  4154 0000D874 01CE                <1> 	add	esi, ecx ; next row address of user's window
  4155                              <1> 		; Note: ecx may be less than row length of video page
  4156                              <1> 		; user's window uses offset according to window width
  4157 0000D876 FECF                <1> 	dec	bh
  4158 0000D878 75EB                <1> 	jnz	short sysvideo_10 ; repeat for next row
  4159                              <1> 	;jmp	sysret
  4160                              <1> sysvideo_9_6:
  4161 0000D87A E9F0F4FFFF          <1> 	jmp	sysret
  4162                              <1> 	
  4163                              <1> sysvideo_11:
  4164                              <1> 	; system to user video/display page window transfer (mode 0)
  4165 0000D87F 87FE                <1> 	xchg	edi, esi
  4166                              <1> sysvideo_12:
  4167                              <1> 	; esi = beginning addr of the (screen, video page) window
  4168                              <1> 	; edi =	user's buffer	
  4169 0000D881 E823350000          <1> 	call	transfer_to_user_buffer ; fast transfer
  4170                              <1> 	;jc	sysret
  4171                              <1> 	; 23/07/2022
  4172 0000D886 72F2                <1> 	jc	short sysvideo_9_6 ; jmp sysret	
  4173                              <1> 
  4174                              <1> 	; ecx = actual transfer count (must be same with input)
  4175 0000D888 010D[1C010300]      <1> 	add	[u.r0], ecx
  4176 0000D88E 01D6                <1> 	add	esi, edx ; next row (edx = 160)
  4177 0000D890 01CF                <1> 	add	edi, ecx ; next row of the user's window 
  4178                              <1> 			 ; (ecx <= 160)
  4179 0000D892 FECF                <1> 	dec	bh
  4180 0000D894 75EB                <1> 	jnz	short sysvideo_12
  4181                              <1> sysvideo_12_0:
  4182 0000D896 E9D4F4FFFF          <1> 	jmp	sysret
  4183                              <1> 
  4184                              <1> sysvideo_13:
  4185                              <1> 	; 28/12/2020
  4186 0000D89B 80FF01              <1> 	cmp	bh, 1
  4187 0000D89E 7752                <1>         ja      short sysvideo_15 ; 23/11/2020
  4188                              <1> 
  4189                              <1> 	; 25/02/2021
  4190                              <1> 	; 12/02/2021
  4191                              <1> 	; 29/01/2021, 31/01/2021
  4192                              <1> 	; 23/11/2020 (TRDOS 386 v2.0.3)
  4193                              <1> 	; (major modification, from mode 13h to all VGA modes,
  4194                              <1> 	;  except super VGA modes and liner frame buffer method)
  4195                              <1> 
  4196                              <1> 	; BH = 1 = VGA Graphics mode (0A0000h) data transfers
  4197                              <1> 
  4198                              <1> 	; 29/01/2021
  4199 0000D8A0 66B84001            <1> 	mov	ax, 320	; 320 pixels
  4200 0000D8A4 F6C380              <1> 	test	bl, 80h	; bit 7 (screen width, 640 pixels)		
  4201 0000D8A7 7407                <1> 	jz	short sysvideo_13_0
  4202                              <1> 	;shl	ax, 1	; 640 pixels
  4203                              <1> 	; 23/07/2022
  4204 0000D8A9 D1E0                <1> 	shl	eax, 1
  4205                              <1> 	;
  4206 0000D8AB 80E37F              <1> 	and	bl, 7Fh
  4207 0000D8AE 7405                <1> 	jz	short sysvideo_14
  4208                              <1> sysvideo_13_0:
  4209                              <1> 	; 29/01/2021
  4210 0000D8B0 80FB41              <1> 	cmp	bl, 41h
  4211 0000D8B3 77E1                <1> 	ja	short sysvideo_12_0 ; invalid (unknown) sub function
  4212                              <1> sysvideo_14:
  4213 0000D8B5 66A3[3A100300]      <1> 	mov	[v_width], ax	; save screen width
  4214 0000D8BB C705[3E100300]0000- <1> 	mov	dword [v_mem], 0A0000h  ; save video memory address
  4214 0000D8C3 0A00                <1>
  4215 0000D8C5 C705[42100300]0000- <1> 	mov	dword [v_siz], 65536	; save video memory size
  4215 0000D8CD 0100                <1>
  4216 0000D8CF C705[4A100300]0000- <1> 	mov	dword [v_end], 0B0000h	; save end of video page
  4216 0000D8D7 0B00                <1>
  4217 0000D8D9 B708                <1> 	mov	bh, 8
  4218 0000D8DB 883D[3D100300]      <1> 	mov	[v_bpp], bh ; 8	; bits per pixel (256 colors)
  4219 0000D8E1 881D[3C100300]      <1> 	mov	[v_ops], bl	; VGA data transfer options
  4220                              <1> 	;mov	[maskbuff], edi ; 25/02/2021 
  4221 0000D8E7 893D[4E100300]      <1> 	mov	[maskcolor], edi ; 25/02/2021
  4222                              <1> 			; save mask color or bitmask buffer address
  4223 0000D8ED E9BE000000          <1> 	jmp	sysvideo_15_7
  4224                              <1> 
  4225                              <1> sysvideo_15:
  4226                              <1> 	; 23/07/2022
  4227                              <1> 	; 28/12/2020
  4228 0000D8F2 80FF02              <1> 	cmp	bh, 2
  4229                              <1>         ;ja	sysvideo_16
  4230                              <1> 	; 23/07/2022
  4231 0000D8F5 7605                <1> 	jna	short sysvideo_15_17
  4232 0000D8F7 E9ED1E0000          <1> 	jmp	sysvideo_16
  4233                              <1> sysvideo_15_17:	; 23/07/2022
  4234                              <1> 	; 25/02/2021
  4235                              <1> 	; 12/02/2021
  4236                              <1> 	; 30/01/2021 - 31/01/2021
  4237                              <1> 	; 01/01/2021 - 29/01/2021
  4238                              <1> 	; 26/12/2020 - 27/12/2020
  4239                              <1> 	; 25/12/2020 (TRDOS 386 v2.0.3)
  4240                              <1> 	;
  4241                              <1> 	; BH = 2 = SVGA (VESA VBE) Graphics mode (LFB) data transfers
  4242                              <1> 
  4243                              <1> 	; 25/12/2020
  4244                              <1> 	; resolution table entry will be saved into EBP register
  4245                              <1> 
  4246 0000D8FC 803D[64090000]02    <1> 	cmp	byte [vbe3], 2 ; VESA VBE 3 video bios 
  4247                              <1> 			  ; or BOCHS/QEMU/VIRTUALBOX emu video bios
  4248 0000D903 724E                <1> 	jb	short sysvideo_15_4 ; no, nothing to do !
  4249 0000D905 770B                <1> 	ja	short sysvideo_15_0 ; yes
  4250                              <1> 
  4251                              <1> 	; Only Bochs/Plex86 (emu) vbe2 video bios is usable in pmid
  4252                              <1> 	; (if [vbe3] = 2) 
  4253 0000D907 A0[65090000]        <1> 	mov	al, [vbe2bios] ; Bochs vbios sign is from C0h to C5h
  4254 0000D90C 24F0                <1> 	and	al, 0F0h
  4255 0000D90E 3CC0                <1> 	cmp	al, 0C0h
  4256 0000D910 7541                <1> 	jne	short sysvideo_15_4 ; unknown (vbe2) video bios
  4257                              <1> sysvideo_15_0:
  4258                              <1> 	; 29/01/2021
  4259 0000D912 80FB41              <1> 	cmp	bl, 41h
  4260 0000D915 773C                <1> 	ja	short sysvideo_15_4 ; invalid (unknown) sub function
  4261                              <1> 	; 29/01/2021
  4262 0000D917 881D[3C100300]      <1> 	mov	[v_ops], bl	; SVGA data transfer options
  4263                              <1> 
  4264 0000D91D 89D8                <1> 	mov	eax, ebx ; hw of ebx is vesa vbe video mode
  4265 0000D91F C1E810              <1> 	shr	eax, 16 ; ax = vesa vbe video mode
  4266 0000D922 7513                <1> 	jnz	short sysvideo_15_2 
  4267                              <1> 	; ax = 0
  4268                              <1> 
  4269                              <1> 	; check & use current video mode
  4270 0000D924 803D[1E670000]FF    <1> 	cmp	byte [CRT_MODE], 0FFh ; extended (SVGA) mode ?
  4271 0000D92B 7526                <1> 	jne	short sysvideo_15_4 ; no
  4272                              <1> sysvideo_15_1:
  4273                              <1> 	; use current vbe (svga) video mode
  4274 0000D92D 66A1[D20F0300]      <1> 	mov	ax, [video_mode] ; extended (SVGA, VESA VBE) mode
  4275 0000D933 6625FF01            <1> 	and	ax, 1FFh ; vesa vbe video mode: 1XXh
  4276                              <1> sysvideo_15_2:
  4277                              <1> 	; 29/01/2021
  4278                              <1> 	;mov	[maskbuff], edi ; 25/02/2021
  4279 0000D937 893D[4E100300]      <1> 	mov	[maskcolor], edi ; 25/02/2021
  4280                              <1> 			; save mask color or bitmask buffer address
  4281 0000D93D BD[AA6A0000]        <1> 	mov	ebp, b_vbe_modes ; vbe mode table (in 'vidata.s')
  4282                              <1> sysvideo_15_3:
  4283 0000D942 663B4500            <1> 	cmp	ax, [ebp]
  4284 0000D946 7410                <1> 	je	short sysvideo_15_5
  4285 0000D948 83C508              <1> 	add	ebp, 8 ; vbe mode table entry size
  4286 0000D94B 81FD[6A6B0000]      <1> 	cmp	ebp, end_of_b_vbe_modes
  4287 0000D951 72EF                <1>  	jb	short sysvideo_15_3	
  4288                              <1> sysvideo_15_4:
  4289                              <1> 	; desired video mode is not a valid (implemented)
  4290                              <1> 	;	  extended (VESA VBE, SVGA) video mode
  4291                              <1> 	;
  4292                              <1> 	; nothing to do !
  4293                              <1> 
  4294                              <1>  	; [u.r0] = 0  ; return value of EAX
  4295 0000D953 E917F4FFFF          <1>  	jmp	sysret
  4296                              <1> 
  4297                              <1> sysvideo_15_5:
  4298                              <1> 	; get LFB address
  4299 0000D958 A1[E00F0300]        <1> 	mov	eax, [LFB_ADDR] ; [LFB_Info+LFBINFO.LFB_addr]
  4300 0000D95D 09C0                <1> 	or	eax, eax
  4301 0000D95F 7509                <1> 	jnz	short sysvideo_15_6
  4302 0000D961 66A1[F60E0000]      <1> 	mov	ax, [def_LFB_addr] ; default LFB addr 
  4303                              <1> 				   ; (for vbe mode 118h)
  4304 0000D967 C1E010              <1> 	shl	eax, 16
  4305                              <1> 	; 27/12/2020
  4306                              <1> 	;jz	short sysvideo_15_4
  4307                              <1> sysvideo_15_6:
  4308                              <1> 	; 29/01/2021
  4309 0000D96A A3[3E100300]        <1> 	mov	[v_mem], eax ; save video memory address
  4310                              <1> 	
  4311                              <1> 	; 27/12/2020
  4312                              <1> 	; 26/12/2020
  4313 0000D96F 8B4502              <1> 	mov	eax, [ebp+2] ; width, height
  4314                              <1> 	; 29/01/2021
  4315 0000D972 66A3[3A100300]      <1> 	mov	[v_width], ax ; save screen width
  4316                              <1> 	; 28/12/2020
  4317 0000D978 8A7D06              <1> 	mov	bh, [ebp+6] ; bpp
  4318                              <1> 	; 28/02/2021
  4319                              <1> 	; check default truecolor bpp value and use
  4320                              <1> 	; 32bpp instead of 24bpp if the default value
  4321                              <1> 	; has been set to 32bpp.
  4322 0000D97B 80FF18              <1> 	cmp	bh, 24
  4323 0000D97E 750B                <1> 	jne	short sysvideo_15_16
  4324 0000D980 803D[0B740100]20    <1> 	cmp	byte [truecolor], 32
  4325                              <1> 		; Default truecolor bpp value,
  4326                              <1> 		; it is 32 for VBE3 video bios
  4327                              <1> 		; (it can be set to 32 or 24)
  4328 0000D987 7502                <1> 	jne	short sysvideo_15_16 ; not VBE3 !
  4329                              <1> 				; or it is set to 24  	
  4330 0000D989 B720                <1> 	mov	bh, 32
  4331                              <1> 	; 28/02/2021
  4332                              <1> sysvideo_15_16:
  4333                              <1> 	; 29/01/2021
  4334 0000D98B 883D[3D100300]      <1> 	mov	[v_bpp], bh ; bits per pixel
  4335                              <1> 
  4336 0000D991 52                  <1> 	push	edx ; *
  4337 0000D992 0FB7D0              <1> 	movzx	edx, ax  ; width
  4338 0000D995 C1E810              <1> 	shr	eax, 16  ; height
  4339 0000D998 F7E2                <1> 	mul	edx
  4340                              <1> 	; eax = linear frame buffer size (pixels)
  4341                              <1> 	; 29/01/2021
  4342 0000D99A A3[42100300]        <1> 	mov	[v_siz], eax ; save video page size
  4343 0000D99F E8FD000000          <1> 	call	pixels_to_byte_count
  4344 0000D9A4 0305[3E100300]      <1> 	add	eax, [v_mem]
  4345 0000D9AA A3[4A100300]        <1> 	mov	[v_end], eax ; save end of video page 
  4346 0000D9AF 5A                  <1> 	pop	edx ; *
  4347                              <1> 
  4348                              <1> 	; bh = bits per pixel
  4349                              <1> 	; (bh will not be used after here, 29/01/2021)
  4350                              <1> 
  4351                              <1> 	; bl = pixel operations & options
  4352                              <1> 	; ecx, edx, esi, edi input parameters
  4353                              <1> 	; [maskcolor] = edi input ; 25/02/2021
  4354                              <1> 
  4355                              <1> sysvideo_15_7:
  4356                              <1> 	; 29/01/2021
  4357                              <1> 	;test	byte [v_ops], 40h  ; system to user ?
  4358 0000D9B0 F6C340              <1> 	test	bl, 40h
  4359 0000D9B3 7517                <1> 	jnz	short sysvideo_15_9
  4360                              <1> 
  4361 0000D9B5 31C0                <1> 	xor	eax, eax
  4362 0000D9B7 88D8                <1> 	mov	al, bl
  4363 0000D9B9 BB[DFDA0000]        <1> 	mov	ebx, pixel_ops
  4364 0000D9BE 240F                <1> 	and	al, 0Fh ; isolate 16 pixel operations
  4365 0000D9C0 C0E002              <1> 	shl	al, 2 ; * 4 for dword table pointers 
  4366 0000D9C3 01C3                <1> 	add	ebx, eax
  4367                              <1> 
  4368                              <1> 	; ebx = subroutine address
  4369                              <1> 
  4370                              <1> 	; ecx, edx, esi, edi input parameters
  4371                              <1> 	; [maskbuff] = edi input
  4372                              <1> 	; [maskcolor] = edi input ; 25/02/2021
  4373                              <1> 
  4374 0000D9C5 FF13                <1> 	call	[ebx]		
  4375                              <1> sysvideo_15_8:
  4376 0000D9C7 E9A3F3FFFF          <1> 	jmp	sysret
  4377                              <1> 
  4378                              <1> sysvideo_15_9:
  4379                              <1> 	; system to user display page or window copy
  4380                              <1> 	;test	byte [v_ops], 1 ; window copy ?
  4381 0000D9CC F6C301              <1> 	test	bl, 1	
  4382 0000D9CF 7521                <1> 	jnz	short sysvideo_15_10
  4383                              <1> 
  4384                              <1> 	; display page (full screen copy)
  4385 0000D9D1 8B35[3E100300]      <1> 	mov	esi, [v_mem] ; LFB start address
  4386 0000D9D7 A1[42100300]        <1> 	mov	eax, [v_siz]
  4387 0000D9DC E8C0000000          <1> 	call	pixels_to_byte_count
  4388 0000D9E1 89C1                <1> 	mov	ecx, eax ; transfer count in bytes
  4389                              <1> 	;edi = user's buffer address
  4390 0000D9E3 E8C1330000          <1> 	call	transfer_to_user_buffer
  4391 0000D9E8 72DD                <1> 	jc	short sysvideo_15_8	
  4392 0000D9EA 890D[1C010300]      <1> 	mov	[u.r0], ecx
  4393 0000D9F0 EBD5                <1> 	jmp	short sysvideo_15_8
  4394                              <1> 
  4395                              <1> sysvideo_15_10:
  4396 0000D9F2 E820000000          <1> 	call	sysvideo_15_12 ; window preparations
  4397 0000D9F7 72CE                <1> 	jc	short sysvideo_15_8
  4398                              <1> 
  4399 0000D9F9 8B35[46100300]      <1> 	mov	esi, [v_str]
  4400                              <1> sysvideo_15_11:
  4401                              <1> 	; esi = window's current row address (video mem)
  4402                              <1> 	; edi = current row (virtual) addr in user's buff
  4403                              <1> 	; ecx = transfer count per row
  4404 0000D9FF E8A5330000          <1> 	call	transfer_to_user_buffer
  4405 0000DA04 72C1                <1> 	jc	short sysvideo_15_8
  4406 0000DA06 010D[1C010300]      <1>  	add	[u.r0], ecx
  4407 0000DA0C 4B                  <1> 	dec	ebx
  4408 0000DA0D 74B8                <1> 	jz	short sysvideo_15_8 ; ok.
  4409                              <1> 	; next row
  4410 0000DA0F 01CF                <1> 	add	edi, ecx ; next row in user's buffer
  4411 0000DA11 01D6                <1> 	add	esi, edx ; next row of window (system)
  4412 0000DA13 EBEA                <1> 	jmp	short sysvideo_15_11
  4413                              <1> 
  4414                              <1> sysvideo_15_14:
  4415 0000DA15 F9                  <1> 	stc	 ; error !
  4416                              <1> sysvideo_15_15:
  4417 0000DA16 C3                  <1> 	retn
  4418                              <1> 
  4419                              <1> sysvideo_15_12:
  4420                              <1> 	; 30/01/2021
  4421                              <1> 	; 29/01/2021
  4422                              <1> 	; Window address preparations for window copy
  4423 0000DA17 6621D2              <1> 	and	dx, dx
  4424 0000DA1A 74F9                <1> 	jz	short sysvideo_15_14 ; invalid (zero columns)
  4425                              <1> 	;test	edx, 0FFFF0000h
  4426                              <1> 	;jz	short sysvideo_15_14 ; invalid (zero rows)
  4427 0000DA1C 81FA00000100        <1> 	cmp	edx, 65536
  4428 0000DA22 72F2                <1> 	jb	short sysvideo_15_15 ; invalid (zero rows)
  4429 0000DA24 89C8                <1> 	mov	eax, ecx ; start position (row, column)
  4430 0000DA26 E899000000          <1> 	call	calc_pixel_offset
  4431 0000DA2B 3B05[42100300]      <1> 	cmp	eax, [v_siz]
  4432 0000DA31 73E2                <1> 	jnb	short sysvideo_15_14 ; out of display page
  4433                              <1> 				; nothing to do
  4434 0000DA33 E869000000          <1> 	call	pixels_to_byte_count
  4435 0000DA38 0305[3E100300]      <1> 	add	eax, [v_mem]
  4436 0000DA3E A3[46100300]        <1> 	mov	[v_str], eax ; window start address
  4437                              <1> 			     ; (addr of top left corner)
  4438                              <1> 	; check column limit
  4439 0000DA43 89C8                <1> 	mov	eax, ecx
  4440 0000DA45 6601D0              <1> 	add	ax, dx  ; add columns to start column
  4441 0000DA48 72CC                <1> 	jc	short sysvideo_15_15 ; cf = 1
  4442 0000DA4A 663B05[3A100300]    <1> 	cmp	ax, [v_width]
  4443 0000DA51 77C2                <1> 	ja	short sysvideo_15_14
  4444                              <1> 
  4445 0000DA53 89D0                <1> 	mov	eax, edx ; size
  4446 0000DA55 2D00000100          <1> 	sub	eax, 65536 ; row count -> 0 based row #
  4447 0000DA5A E865000000          <1> 	call	calc_pixel_offset
  4448 0000DA5F 3B05[42100300]      <1> 	cmp	eax, [v_siz] ; video (display) page size
  4449 0000DA65 77AE                <1> 	ja	short sysvideo_15_14 ; out of display page
  4450                              <1> 				; nothing to do
  4451 0000DA67 E835000000          <1> 	call	pixels_to_byte_count
  4452 0000DA6C 0305[46100300]      <1> 	add	eax, [v_str] ; window start address
  4453 0000DA72 3B05[4A100300]      <1> 	cmp	eax, [v_end] ; window end address (+1)
  4454                              <1> 			 ; (addr of bottom right corner +1)	
  4455 0000DA78 779B                <1> 	ja	short sysvideo_15_14 ; out of display page
  4456                              <1> 				; nothing to do
  4457 0000DA7A 89D3                <1> 	mov	ebx, edx
  4458 0000DA7C C1EB10              <1> 	shr	ebx, 16 
  4459                              <1> 	; ebx = row count
  4460 0000DA7F 81E2FFFF0000        <1> 	and	edx, 0FFFFh
  4461                              <1> 	; edx = transfer count per row (from user's buffer)
  4462                              <1> 	;	(in pixels, window width)
  4463 0000DA85 89D0                <1> 	mov	eax, edx
  4464 0000DA87 A3[52100300]        <1> 	mov	[pixcount], eax ; 27/02/2021
  4465 0000DA8C E810000000          <1> 	call	pixels_to_byte_count
  4466 0000DA91 89C1                <1> 	mov	ecx, eax
  4467                              <1> 	; ecx = transfer count per row (from user's buffer)
  4468                              <1> 	;	(in bytes, window width)
  4469 0000DA93 66A1[3A100300]      <1> 	mov	ax, [v_width]
  4470 0000DA99 E803000000          <1> 	call	pixels_to_byte_count
  4471 0000DA9E 89C2                <1> 	mov	edx, eax
  4472                              <1> 	; edx = byte count per row
  4473 0000DAA0 C3                  <1> 	retn ; cf = 0
  4474                              <1> 
  4475                              <1> pixels_to_byte_count:
  4476                              <1> 	; 29/01/2021
  4477                              <1> 	; INPUT:
  4478                              <1> 	;   eax = pixel count
  4479                              <1> 	; OUTPUT:
  4480                              <1> 	;   eax = byte count
  4481                              <1> 	;
  4482 0000DAA1 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8
  4483 0000DAA8 7619                <1> 	jna	short pixtobc_3 ; 8 bit colors
  4484 0000DAAA 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24
  4485 0000DAB1 720A                <1> 	jb	short pixtobc_1 ; 16 bit colors
  4486 0000DAB3 770B                <1> 	ja	short pixtobc_2 ; 32 bit colors
  4487                              <1> 	; 24 bit pixels
  4488                              <1> 	; eax = eax * 3
  4489                              <1> 	;push	edx
  4490                              <1> 	;mov	edx, eax
  4491                              <1> 	;shl	eax, 1
  4492                              <1> 	;add	eax, edx
  4493                              <1> 	;pop	edx
  4494 0000DAB5 50                  <1> 	push	eax
  4495 0000DAB6 D1E0                <1> 	shl	eax, 1
  4496 0000DAB8 010424              <1> 	add	[esp], eax
  4497 0000DABB 58                  <1> 	pop	eax
  4498 0000DABC C3                  <1> 	retn		
  4499                              <1> pixtobc_1:
  4500                              <1> 	; 32 bit pixels
  4501                              <1> 	; eax = eax * 2
  4502 0000DABD D1E0                <1> 	shl	eax, 1
  4503 0000DABF C3                  <1> 	retn
  4504                              <1> pixtobc_2:
  4505                              <1> 	; 16 bit pixels
  4506                              <1> 	; eax = eax * 4
  4507 0000DAC0 C1E002              <1> 	shl	eax, 2
  4508                              <1> pixtobc_3:
  4509 0000DAC3 C3                  <1> 	retn
  4510                              <1> 
  4511                              <1> calc_pixel_offset:
  4512                              <1> 	; 29/01/2021
  4513                              <1> 	; INPUT:
  4514                              <1> 	;   eax = pixel position (row, column)
  4515                              <1> 	; OUTPUT:
  4516                              <1> 	;   eax = pixel offset (linear address)
  4517                              <1> 	;
  4518 0000DAC4 52                  <1> 	push	edx
  4519 0000DAC5 50                  <1> 	push	eax
  4520 0000DAC6 C1E810              <1> 	shr	eax, 16
  4521 0000DAC9 7409                <1> 	jz	short cpixo_0
  4522                              <1> 	; eax = row 
  4523 0000DACB 0FB715[3A100300]    <1> 	movzx	edx, word [v_width]
  4524 0000DAD2 F7E2                <1> 	mul	edx
  4525                              <1> cpixo_0:
  4526                              <1> 	; eax = row * screen width
  4527 0000DAD4 5A                  <1> 	pop	edx
  4528 0000DAD5 81E2FFFF0000        <1> 	and	edx, 0FFFFh
  4529                              <1> 	; edx = column
  4530 0000DADB 01D0                <1> 	add	eax, edx
  4531                              <1> 	; eax = (row * screen width) + column		
  4532 0000DADD 5A                  <1> 	pop	edx
  4533 0000DADE C3                  <1> 	retn
  4534                              <1> 
  4535                              <1> 	; 02/02/2021
  4536                              <1> 	; 29/01/2021
  4537                              <1> pixel_ops:
  4538 0000DADF [1FDB0000]          <1> 	dd	pix_op_cpy ; copy pixels (user to system)
  4539 0000DAE3 [6AE00000]          <1> 	dd	pix_op_new ; change (new, fill) color
  4540 0000DAE7 [87DB0000]          <1> 	dd	pix_op_add ; add color (up to 0FFh)
  4541 0000DAEB [39DC0000]          <1> 	dd	pix_op_sub ; sub color (down to 0)
  4542 0000DAEF [54DE0000]          <1> 	dd	pix_op_orc ; or color
  4543 0000DAF3 [06DF0000]          <1> 	dd	pix_op_and ; and color
  4544 0000DAF7 [B8DF0000]          <1> 	dd	pix_op_xor ; xor color
  4545 0000DAFB [2EE10000]          <1> 	dd	pix_op_not ; not color
  4546 0000DAFF [D8E10000]          <1> 	dd	pix_op_neg ; neg color
  4547 0000DB03 [82E20000]          <1> 	dd	pix_op_inc ; inc color
  4548 0000DB07 [2CE30000]          <1> 	dd	pix_op_dec ; dec color
  4549 0000DB0B [EBDC0000]          <1> 	dd	pix_op_mix ; mix color
  4550 0000DB0F [B2DD0000]          <1> 	dd	pix_op_rpl ; replace color
  4551 0000DB13 [D6E30000]          <1> 	dd	pix_op_blk ; copy pixel block(s) (sys)
  4552 0000DB17 [84E40000]          <1> 	dd	pix_op_lin ; write line(s)
  4553 0000DB1B [67E80000]          <1> 	dd	pix_op_chr ; write character (font)
  4554                              <1> 
  4555                              <1> pix_op_cpy:
  4556                              <1> 	; 21/02/2021
  4557                              <1> 	; 06/02/2021
  4558                              <1> 	; 30/01/2021
  4559                              <1> 	; COPY PIXELS
  4560                              <1> 	;
  4561                              <1> 	; INPUT:
  4562                              <1> 	;  If bit 4 of BL or [v_ops] = 1 -window copy-
  4563                              <1> 	;  ECX = start position (row, column)
  4564                              <1> 	;        (HW = row, CX = column)
  4565                              <1> 	;  EDX = size (rows, colums)
  4566                              <1> 	;        (HW = rows, DX = columns)
  4567                              <1> 	;	 (0 -> invalid 	
  4568                              <1> 	;        (1 -> horizontal or vertical line)
  4569                              <1> 	;  If bit 4 of BL or [v_ops] = 0 -full screen-
  4570                              <1> 	;     ECX and EDX will not be used
  4571                              <1>   	;  ESI = user's buffer address
  4572                              <1> 	;  [maskcolor] = mask color (to be excluded)
  4573                              <1> 	;
  4574                              <1> 	; OUTPUT:
  4575                              <1> 	; 	[u.r0] will be > 0 if succesful
  4576                              <1> 
  4577 0000DB1F F605[3C100300]10    <1> 	test	byte [v_ops], 10h ; display page or window ?
  4578 0000DB26 752E                <1> 	jnz	short pix_op_cpy_w ; window
  4579                              <1> 
  4580 0000DB28 8B3D[3E100300]      <1> 	mov	edi, [v_mem] ; 21/02/2021
  4581                              <1> 	
  4582                              <1> 	; Copy user's buffer content do display page
  4583                              <1> 	; (full screen copy)
  4584 0000DB2E A1[42100300]        <1> 	mov	eax, [v_siz] ; video page size
  4585 0000DB33 E869FFFFFF          <1> 	call	pixels_to_byte_count
  4586 0000DB38 89C1                <1> 	mov	ecx, eax ; transfer count
  4587                              <1> 	; esi = user's buffer address (virtual)
  4588 0000DB3A F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked copy ?
  4589 0000DB41 7405                <1> 	jz	short pix_op_cpy_0 ; no	
  4590 0000DB43 E96F0F0000          <1> 	jmp	m_pix_op_cpy ; copy pixels except mask color
  4591                              <1> pix_op_cpy_0:
  4592                              <1> 	; esi = user buffer for full screen copy
  4593                              <1> 	; edi = start of video memory 
  4594                              <1> 	;	(start of display page)
  4595                              <1> 	; ecx = byte count (display page size in bytes)
  4596 0000DB48 E8A6320000          <1> 	call	transfer_from_user_buffer
  4597 0000DB4D 7206                <1> 	jc	short pix_op_cpy_1
  4598 0000DB4F 890D[1C010300]      <1> 	mov	[u.r0], ecx
  4599                              <1> pix_op_cpy_1:
  4600 0000DB55 C3                  <1> 	retn	; 06/02/2021
  4601                              <1> 
  4602                              <1> pix_op_cpy_w:
  4603 0000DB56 E8BCFEFFFF          <1> 	call	sysvideo_15_12 ; window preparations
  4604 0000DB5B 72F8                <1> 	jc	short pix_op_cpy_1
  4605                              <1> 	; ecx = bytes per row (to be applied)
  4606                              <1> 	; edx = screen width in bytes
  4607                              <1> 	; ebx = row count
  4608 0000DB5D 8B3D[46100300]      <1> 	mov	edi, [v_str]
  4609 0000DB63 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked copy ?
  4610 0000DB6A 7405                <1> 	jz	short pix_op_cpy_w_0 ; no
  4611 0000DB6C E909100000          <1> 	jmp	m_pix_op_cpy_w ; window copy except mask color
  4612                              <1> pix_op_cpy_w_0:
  4613                              <1> 	; esi = current row (virtual) addr in user's buff
  4614                              <1> 	; edi = window's current row address (video mem)
  4615                              <1> 	; ecx = transfer count per row
  4616 0000DB71 E87D320000          <1> 	call	transfer_from_user_buffer
  4617 0000DB76 72DD                <1> 	jc	short pix_op_cpy_1
  4618 0000DB78 010D[1C010300]      <1>  	add	[u.r0], ecx
  4619 0000DB7E 4B                  <1> 	dec	ebx
  4620 0000DB7F 74D4                <1> 	jz	short pix_op_cpy_1 ; ok.
  4621                              <1> 	; next row
  4622 0000DB81 01CE                <1> 	add	esi, ecx ; next row in user's buffer
  4623 0000DB83 01D7                <1> 	add	edi, edx ; next row of window (system)
  4624 0000DB85 EBEA                <1> 	jmp	short pix_op_cpy_w_0
  4625                              <1> 
  4626                              <1> pix_op_add:
  4627                              <1> 	; 31/01/2021
  4628                              <1> 	; 30/01/2021
  4629                              <1> 	; ADD COLOR
  4630                              <1> 	;
  4631                              <1> 	; INPUT:
  4632                              <1> 	;   CL = color (8 bit, 256 colors)
  4633                              <1> 	;  ECX = color (16 bit and true colors)
  4634                              <1> 	;  EDX = start position (row, column)
  4635                              <1> 	;        (HW = row, DX = column)
  4636                              <1> 	;  ESI = size (rows, colums)
  4637                              <1> 	;        (HW = rows, SI = columns)
  4638                              <1> 	;
  4639                              <1> 	;  [maskcolor] = mask color (to be excluded)
  4640                              <1> 	;
  4641                              <1> 	; OUTPUT:
  4642                              <1> 	; 	[u.r0] will be > 0 if succesful
  4643                              <1> 	
  4644 0000DB87 F605[3C100300]10    <1> 	test	byte [v_ops], 10h ; display page or window ?
  4645 0000DB8E 7555                <1> 	jnz	short pix_op_add_w ; window
  4646                              <1> 	
  4647 0000DB90 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  4648 0000DB96 89FE                <1> 	mov	esi, edi
  4649                              <1> 	; ecx = color (CL, CX, ECX)
  4650 0000DB98 89C8                <1> 	mov	eax, ecx
  4651 0000DB9A 8B0D[42100300]      <1> 	mov	ecx, [v_siz] ; display page pixel count
  4652                              <1> 
  4653 0000DBA0 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color adding ?
  4654 0000DBA7 7405                <1> 	jz	short pix_op_add_0 ; no
  4655 0000DBA9 E9CB100000          <1> 	jmp	m_pix_op_add ; add color except mask color
  4656                              <1> pix_op_add_0:
  4657 0000DBAE 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  4658 0000DBB5 7707                <1> 	ja	short pix_op_add_1
  4659                              <1> 
  4660                              <1> 	; 256 colors (8bpp)
  4661 0000DBB7 E84C0A0000          <1> 	call	pix_op_add_8
  4662 0000DBBC EB1E                <1> 	jmp	short pix_op_add_4	
  4663                              <1> 			
  4664                              <1> pix_op_add_1:
  4665 0000DBBE 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  4666 0000DBC5 7710                <1> 	ja	short pix_op_add_3 ; 32bpp	
  4667 0000DBC7 7207                <1> 	jb	short pix_op_add_2 ; 16bpp
  4668                              <1> 	
  4669                              <1> 	; 24 bit true colors
  4670 0000DBC9 E85A0A0000          <1> 	call	pix_op_add_24
  4671 0000DBCE EB0C                <1> 	jmp	short pix_op_add_4
  4672                              <1> 
  4673                              <1> 	; 65536 colors (16bpp)
  4674                              <1> pix_op_add_2:
  4675 0000DBD0 E8410A0000          <1> 	call	pix_op_add_16
  4676 0000DBD5 EB05                <1> 	jmp	short pix_op_add_4
  4677                              <1> 
  4678                              <1> 	; 32 bit true colors
  4679                              <1> pix_op_add_3:
  4680 0000DBD7 E86C0A0000          <1> 	call	pix_op_add_32
  4681                              <1> pix_op_add_4:
  4682 0000DBDC 29F7                <1> 	sub	edi, esi
  4683 0000DBDE 893D[1C010300]      <1> 	mov	[u.r0], edi	
  4684                              <1> pix_op_add_5:
  4685 0000DBE4 C3                  <1> 	retn		
  4686                              <1> 
  4687                              <1> pix_op_add_w:
  4688                              <1> 	; 31/01/2021
  4689 0000DBE5 51                  <1> 	push	ecx ; * ; color
  4690 0000DBE6 89D1                <1> 	mov	ecx, edx ; win start pos
  4691 0000DBE8 89F2                <1> 	mov	edx, esi ; size (rows, cols)
  4692 0000DBEA E828FEFFFF          <1> 	call	sysvideo_15_12 ; window preparations
  4693 0000DBEF 58                  <1> 	pop	eax ; * ; color
  4694 0000DBF0 72F2                <1> 	jc	short pix_op_add_5
  4695                              <1> 
  4696 0000DBF2 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color adding ?
  4697 0000DBF9 7405                <1> 	jz	short pix_op_add_w_0 ; no
  4698 0000DBFB E927110000          <1> 	jmp	m_pix_op_add_w 
  4699                              <1> 			; window add color except mask color
  4700                              <1> pix_op_add_w_0:
  4701                              <1> 	; ecx = bytes per row (to be applied)
  4702                              <1> 	; edx = screen width in bytes
  4703                              <1> 	; ebx = row count
  4704                              <1> 	; eax = color
  4705                              <1> 
  4706 0000DC00 8B3D[46100300]      <1> 	mov	edi, [v_str]
  4707 0000DC06 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  4708 0000DC0D 7707                <1> 	ja	short pix_op_add_w_1
  4709                              <1> 
  4710                              <1> 	; 256 colors (8bpp)
  4711 0000DC0F BD[08E60000]        <1> 	mov	ebp, pix_op_add_8
  4712 0000DC14 EB1E                <1> 	jmp	short pix_op_add_w_4
  4713                              <1> 			
  4714                              <1> pix_op_add_w_1:
  4715 0000DC16 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  4716 0000DC1D 7710                <1> 	ja	short pix_op_add_w_3 ; 32bpp
  4717 0000DC1F 7207                <1> 	jb	short pix_op_add_w_2 ; 16bpp
  4718                              <1> 
  4719                              <1> 	; 24 bit true colors
  4720 0000DC21 BD[28E60000]        <1> 	mov	ebp, pix_op_add_24
  4721 0000DC26 EB0C                <1> 	jmp	short pix_op_add_w_4
  4722                              <1> 
  4723                              <1> 	; 65536 colors (16bpp)
  4724                              <1> pix_op_add_w_2:
  4725 0000DC28 BD[16E60000]        <1> 	mov	ebp, pix_op_add_16
  4726 0000DC2D EB05                <1> 	jmp	short pix_op_add_w_4
  4727                              <1> 
  4728                              <1> 	; 32 bit true colors
  4729                              <1> pix_op_add_w_3:
  4730 0000DC2F BD[48E60000]        <1> 	mov	ebp, pix_op_add_32
  4731                              <1> pix_op_add_w_4:
  4732 0000DC34 E95F010000          <1> 	jmp	pix_op_add_w_x
  4733                              <1> 
  4734                              <1> pix_op_sub:
  4735                              <1> 	; 31/01/2021
  4736                              <1> 	; SUB COLOR
  4737                              <1> 	;
  4738                              <1> 	; INPUT:
  4739                              <1> 	;   CL = color (8 bit, 256 colors)
  4740                              <1> 	;  ECX = color (16 bit and true colors)
  4741                              <1> 	;  EDX = start position (row, column)
  4742                              <1> 	;        (HW = row, DX = column)
  4743                              <1> 	;  ESI = size (rows, colums)
  4744                              <1> 	;        (HW = rows, SI = columns)
  4745                              <1> 	;
  4746                              <1> 	;  [maskcolor] = mask color (to be excluded)
  4747                              <1> 	;
  4748                              <1> 	; OUTPUT:
  4749                              <1> 	; 	[u.r0] will be > 0 if succesful
  4750                              <1> 	
  4751 0000DC39 F605[3C100300]10    <1> 	test	byte [v_ops], 10h ; display page or window ?
  4752 0000DC40 7555                <1> 	jnz	short pix_op_sub_w ; window
  4753                              <1> 	
  4754 0000DC42 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  4755 0000DC48 89FE                <1> 	mov	esi, edi
  4756                              <1> 	; ecx = color (CL, CX, ECX)
  4757 0000DC4A 89C8                <1> 	mov	eax, ecx
  4758 0000DC4C 8B0D[42100300]      <1> 	mov	ecx, [v_siz] ; display page pixel count
  4759                              <1> 
  4760 0000DC52 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color subtract ?
  4761 0000DC59 7405                <1> 	jz	short pix_op_sub_0 ; no
  4762 0000DC5B E9FA100000          <1> 	jmp	m_pix_op_sub ; sub color except mask color
  4763                              <1> pix_op_sub_0:
  4764 0000DC60 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  4765 0000DC67 7707                <1> 	ja	short pix_op_sub_1
  4766                              <1> 
  4767                              <1> 	; 256 colors (8bpp)
  4768 0000DC69 E8E9090000          <1> 	call	pix_op_sub_8
  4769 0000DC6E EB1E                <1> 	jmp	short pix_op_sub_4	
  4770                              <1> 			
  4771                              <1> pix_op_sub_1:
  4772 0000DC70 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  4773 0000DC77 7710                <1> 	ja	short pix_op_sub_3 ; 32bpp	
  4774 0000DC79 7207                <1> 	jb	short pix_op_sub_2 ; 16bpp
  4775                              <1> 	
  4776                              <1> 	; 24 bit true colors
  4777 0000DC7B E8FA090000          <1> 	call	pix_op_sub_24
  4778 0000DC80 EB0C                <1> 	jmp	short pix_op_sub_4
  4779                              <1> 
  4780                              <1> 	; 65536 colors (16bpp)
  4781                              <1> pix_op_sub_2:
  4782 0000DC82 E8E0090000          <1> 	call	pix_op_sub_16
  4783 0000DC87 EB05                <1> 	jmp	short pix_op_sub_4
  4784                              <1> 
  4785                              <1> 	; 32 bit true colors
  4786                              <1> pix_op_sub_3:
  4787 0000DC89 E8060A0000          <1> 	call	pix_op_sub_32
  4788                              <1> pix_op_sub_4:
  4789 0000DC8E 29F7                <1> 	sub	edi, esi
  4790 0000DC90 893D[1C010300]      <1> 	mov	[u.r0], edi	
  4791                              <1> pix_op_sub_5:
  4792 0000DC96 C3                  <1> 	retn		
  4793                              <1> 
  4794                              <1> pix_op_sub_w:
  4795                              <1> 	; 31/01/2021
  4796 0000DC97 51                  <1> 	push	ecx ; * ; color
  4797 0000DC98 89D1                <1> 	mov	ecx, edx ; win start pos
  4798 0000DC9A 89F2                <1> 	mov	edx, esi ; size (rows, cols)
  4799 0000DC9C E876FDFFFF          <1> 	call	sysvideo_15_12 ; window preparations
  4800 0000DCA1 58                  <1> 	pop	eax ; * ; color
  4801 0000DCA2 72F2                <1> 	jc	short pix_op_sub_5
  4802                              <1> 
  4803 0000DCA4 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color subtract ?
  4804 0000DCAB 7405                <1> 	jz	short pix_op_sub_w_0 ; no
  4805 0000DCAD E94B110000          <1> 	jmp	m_pix_op_sub_w 
  4806                              <1> 			; window sub color except mask color
  4807                              <1> pix_op_sub_w_0:
  4808                              <1> 	; ecx = bytes per row (to be applied)
  4809                              <1> 	; edx = screen width in bytes
  4810                              <1> 	; ebx = row count
  4811                              <1> 	; eax = color
  4812                              <1> 
  4813 0000DCB2 8B3D[46100300]      <1> 	mov	edi, [v_str]
  4814 0000DCB8 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  4815 0000DCBF 7707                <1> 	ja	short pix_op_sub_w_1
  4816                              <1> 
  4817                              <1> 	; 256 colors (8bpp)
  4818 0000DCC1 BD[57E60000]        <1> 	mov	ebp, pix_op_sub_8
  4819 0000DCC6 EB1E                <1> 	jmp	short pix_op_sub_w_4
  4820                              <1> 			
  4821                              <1> pix_op_sub_w_1:
  4822 0000DCC8 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  4823 0000DCCF 7710                <1> 	ja	short pix_op_sub_w_3 ; 32bpp
  4824 0000DCD1 7207                <1> 	jb	short pix_op_sub_w_2 ; 16bpp
  4825                              <1> 
  4826                              <1> 	; 24 bit true colors
  4827 0000DCD3 BD[7AE60000]        <1> 	mov	ebp, pix_op_sub_24
  4828 0000DCD8 EB0C                <1> 	jmp	short pix_op_sub_w_4
  4829                              <1> 
  4830                              <1> 	; 65536 colors (16bpp)
  4831                              <1> pix_op_sub_w_2:
  4832 0000DCDA BD[67E60000]        <1> 	mov	ebp, pix_op_sub_16
  4833 0000DCDF EB05                <1> 	jmp	short pix_op_sub_w_4
  4834                              <1> 
  4835                              <1> 	; 32 bit true colors
  4836                              <1> pix_op_sub_w_3:
  4837 0000DCE1 BD[94E60000]        <1> 	mov	ebp, pix_op_sub_32
  4838                              <1> pix_op_sub_w_4:
  4839 0000DCE6 E9AD000000          <1> 	jmp	pix_op_sub_w_x
  4840                              <1> 
  4841                              <1> pix_op_mix:
  4842                              <1> 	; 31/01/2021
  4843                              <1> 	; MIX COLOR
  4844                              <1> 	;
  4845                              <1> 	; INPUT:
  4846                              <1> 	;   CL = color (8 bit, 256 colors)
  4847                              <1> 	;  ECX = color (16 bit and true colors)
  4848                              <1> 	;  EDX = start position (row, column)
  4849                              <1> 	;        (HW = row, DX = column)
  4850                              <1> 	;  ESI = size (rows, colums)
  4851                              <1> 	;        (HW = rows, SI = columns)
  4852                              <1> 	;
  4853                              <1> 	;  [maskcolor] = mask color (to be excluded)
  4854                              <1> 	;
  4855                              <1> 	; OUTPUT:
  4856                              <1> 	; 	[u.r0] will be > 0 if succesful
  4857                              <1> 	
  4858 0000DCEB F605[3C100300]10    <1> 	test	byte [v_ops], 10h ; display page or window ?
  4859 0000DCF2 7555                <1> 	jnz	short pix_op_mix_w ; window
  4860                              <1> 	
  4861 0000DCF4 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  4862 0000DCFA 89FE                <1> 	mov	esi, edi
  4863                              <1> 	; ecx = color (CL, CX, ECX)
  4864 0000DCFC 89C8                <1> 	mov	eax, ecx
  4865 0000DCFE 8B0D[42100300]      <1> 	mov	ecx, [v_siz] ; display page pixel count
  4866                              <1> 
  4867 0000DD04 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color mix ?
  4868 0000DD0B 7405                <1> 	jz	short pix_op_mix_0 ; no
  4869 0000DD0D E91E110000          <1> 	jmp	m_pix_op_mix ; mix colors except mask color
  4870                              <1> pix_op_mix_0:
  4871 0000DD12 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  4872 0000DD19 7707                <1> 	ja	short pix_op_mix_1
  4873                              <1> 
  4874                              <1> 	; 256 colors (8bpp)
  4875 0000DD1B E8F3090000          <1> 	call	pix_op_mix_8
  4876 0000DD20 EB1E                <1> 	jmp	short pix_op_mix_4	
  4877                              <1> 			
  4878                              <1> pix_op_mix_1:
  4879 0000DD22 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  4880 0000DD29 7710                <1> 	ja	short pix_op_mix_3 ; 32bpp	
  4881 0000DD2B 7207                <1> 	jb	short pix_op_mix_2 ; 16bpp
  4882                              <1> 	
  4883                              <1> 	; 24 bit true colors
  4884 0000DD2D E8FC090000          <1> 	call	pix_op_mix_24
  4885 0000DD32 EB0C                <1> 	jmp	short pix_op_mix_4
  4886                              <1> 
  4887                              <1> 	; 65536 colors (16bpp)
  4888                              <1> pix_op_mix_2:
  4889 0000DD34 E8E6090000          <1> 	call	pix_op_mix_16
  4890 0000DD39 EB05                <1> 	jmp	short pix_op_mix_4
  4891                              <1> 
  4892                              <1> 	; 32 bit true colors
  4893                              <1> pix_op_mix_3:
  4894 0000DD3B E80A0A0000          <1> 	call	pix_op_mix_32
  4895                              <1> pix_op_mix_4:
  4896 0000DD40 29F7                <1> 	sub	edi, esi
  4897 0000DD42 893D[1C010300]      <1> 	mov	[u.r0], edi	
  4898                              <1> pix_op_mix_5:
  4899 0000DD48 C3                  <1> 	retn		
  4900                              <1> 
  4901                              <1> pix_op_mix_w:
  4902                              <1> 	; 31/01/2021
  4903 0000DD49 51                  <1> 	push	ecx ; * ; color
  4904 0000DD4A 89D1                <1> 	mov	ecx, edx ; win start pos
  4905 0000DD4C 89F2                <1> 	mov	edx, esi ; size (rows, cols)
  4906 0000DD4E E8C4FCFFFF          <1> 	call	sysvideo_15_12 ; window preparations
  4907 0000DD53 58                  <1> 	pop	eax ; * ; color
  4908 0000DD54 72F2                <1> 	jc	short pix_op_mix_5
  4909                              <1> 
  4910 0000DD56 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color mix ?
  4911 0000DD5D 7405                <1> 	jz	short pix_op_mix_w_0 ; no
  4912 0000DD5F E969110000          <1> 	jmp	m_pix_op_mix_w 
  4913                              <1> 			; window mix colors except mask color
  4914                              <1> pix_op_mix_w_0:
  4915                              <1> 	; ecx = bytes per row (to be applied)
  4916                              <1> 	; edx = screen width in bytes
  4917                              <1> 	; ebx = row count
  4918                              <1> 	; eax = color
  4919                              <1> 
  4920 0000DD64 8B3D[46100300]      <1> 	mov	edi, [v_str]
  4921 0000DD6A 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  4922 0000DD71 7707                <1> 	ja	short pix_op_mix_w_1
  4923                              <1> 
  4924                              <1> 	; 256 colors (8bpp)
  4925 0000DD73 BD[13E70000]        <1> 	mov	ebp, pix_op_mix_8
  4926 0000DD78 EB1E                <1> 	jmp	short pix_op_mix_w_x
  4927                              <1> 			
  4928                              <1> pix_op_mix_w_1:
  4929 0000DD7A 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  4930 0000DD81 7710                <1> 	ja	short pix_op_mix_w_3 ; 32bpp
  4931 0000DD83 7207                <1> 	jb	short pix_op_mix_w_2 ; 16bpp
  4932                              <1> 
  4933                              <1> 	; 24 bit true colors
  4934 0000DD85 BD[2EE70000]        <1> 	mov	ebp, pix_op_mix_24
  4935 0000DD8A EB0C                <1> 	jmp	short pix_op_mix_w_x
  4936                              <1> 
  4937                              <1> 	; 65536 colors (16bpp)
  4938                              <1> pix_op_mix_w_2:
  4939 0000DD8C BD[1FE70000]        <1> 	mov	ebp, pix_op_mix_16
  4940 0000DD91 EB05                <1> 	jmp	short pix_op_mix_w_x
  4941                              <1> 
  4942                              <1> 	; 32 bit true colors
  4943                              <1> pix_op_mix_w_3:
  4944 0000DD93 BD[4AE70000]        <1> 	mov	ebp, pix_op_mix_32
  4945                              <1> 	;jmp	short pix_op_mix_w_x
  4946                              <1> 
  4947                              <1> pix_op_mix_w_x:
  4948                              <1> pix_op_add_w_x:
  4949                              <1> pix_op_sub_w_x:
  4950                              <1> pix_op_rpl_w_x:
  4951                              <1> pix_op_orc_w_x:
  4952                              <1> pix_op_and_w_x:
  4953                              <1> pix_op_xor_w_x:
  4954                              <1> 	; 27/02/2021
  4955                              <1> 	; 31/01/2021
  4956                              <1> 	; ecx = bytes per row (to be applied)
  4957                              <1> 	; edx = windows (screen) width in bytes
  4958                              <1> 	; ebx = row count
  4959                              <1> 	; eax = color
  4960                              <1> 	; ebp = pixel operation subroutine address
  4961 0000DD98 52                  <1> 	push	edx
  4962 0000DD99 51                  <1> 	push	ecx
  4963 0000DD9A 57                  <1> 	push	edi
  4964 0000DD9B 8B0D[52100300]      <1> 	mov	ecx, [pixcount] ; 27/02/2021
  4965 0000DDA1 FFD5                <1> 	call	ebp ; call pixel-row operation
  4966 0000DDA3 5F                  <1> 	pop	edi
  4967 0000DDA4 59                  <1> 	pop	ecx ; bytes per row
  4968 0000DDA5 010D[1C010300]      <1> 	add	[u.r0], ecx
  4969 0000DDAB 5A                  <1> 	pop	edx
  4970 0000DDAC 01D7                <1> 	add	edi, edx ; next row
  4971 0000DDAE 4B                  <1> 	dec	ebx
  4972 0000DDAF 75E7                <1> 	jnz	short pix_op_mix_w_x
  4973 0000DDB1 C3                  <1> 	retn
  4974                              <1> 
  4975                              <1> pix_op_rpl:
  4976                              <1> 	; 01/02/2021
  4977                              <1> 	; REPLACE COLOR
  4978                              <1> 	;
  4979                              <1> 	; INPUT:
  4980                              <1> 	;   CL = old/current color (8 bit, 256 colors)
  4981                              <1> 	;  ECX = old/current color (16 bit and true colors)
  4982                              <1> 	;   DL = new color (8 bit, 256 colors)
  4983                              <1> 	;  EDX = new color (16 bit and true colors)
  4984                              <1> 	;  ESI = start position (row, column)
  4985                              <1> 	;        (HW = row, DX = column)
  4986                              <1> 	;  EDI = size (rows, colums)
  4987                              <1> 	;        (HW = rows, SI = columns)
  4988                              <1> 	; OUTPUT:
  4989                              <1> 	; 	[u.r0] will be > 0 if succesful
  4990                              <1> 	
  4991 0000DDB2 F605[3C100300]10    <1> 	test	byte [v_ops], 10h ; display page or window ?
  4992 0000DDB9 754D                <1> 	jnz	short pix_op_rpl_w ; window
  4993                              <1> 	
  4994 0000DDBB 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  4995 0000DDC1 89FE                <1> 	mov	esi, edi
  4996                              <1> 	; ecx = old color (CL, CX, ECX) -to be replaced with-
  4997                              <1> 	; edx = new color (CL, CX, ECX) -new one-
  4998 0000DDC3 89D0                <1> 	mov	eax, edx ; new color
  4999 0000DDC5 890D[4E100300]      <1> 	mov	[maskcolor], ecx ; old color
  5000 0000DDCB 8B0D[42100300]      <1> 	mov	ecx, [v_siz] ; display page pixel count
  5001                              <1> pix_op_rpl_0:
  5002 0000DDD1 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5003 0000DDD8 7707                <1> 	ja	short pix_op_rpl_1
  5004                              <1> 
  5005                              <1> 	; 256 colors (8bpp)
  5006 0000DDDA E82F0A0000          <1> 	call	pix_op_rpl_8
  5007 0000DDDF EB1E                <1> 	jmp	short pix_op_rpl_4
  5008                              <1> 			
  5009                              <1> pix_op_rpl_1:
  5010 0000DDE1 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5011 0000DDE8 7710                <1> 	ja	short pix_op_rpl_3 ; 32bpp	
  5012 0000DDEA 7207                <1> 	jb	short pix_op_rpl_2 ; 16bpp
  5013                              <1> 
  5014                              <1> 	; 24 bit true colors
  5015 0000DDEC E8400A0000          <1> 	call	pix_op_rpl_24
  5016 0000DDF1 EB0C                <1> 	jmp	short pix_op_rpl_4
  5017                              <1> 
  5018                              <1> 	; 65536 colors (16bpp)
  5019                              <1> pix_op_rpl_2:
  5020 0000DDF3 E8260A0000          <1> 	call	pix_op_rpl_16
  5021 0000DDF8 EB05                <1> 	jmp	short pix_op_rpl_4
  5022                              <1> 
  5023                              <1> 	; 32 bit true colors	
  5024                              <1> pix_op_rpl_3:
  5025 0000DDFA E8540A0000          <1> 	call	pix_op_rpl_32
  5026                              <1> pix_op_rpl_4:
  5027 0000DDFF 29F7                <1> 	sub	edi, esi
  5028 0000DE01 893D[1C010300]      <1> 	mov	[u.r0], edi	
  5029                              <1> pix_op_rpl_5:
  5030 0000DE07 C3                  <1> 	retn
  5031                              <1> 
  5032                              <1> pix_op_rpl_w:
  5033                              <1> 	; 01/02/2021
  5034 0000DE08 890D[4E100300]      <1> 	mov	[maskcolor], ecx ; old color
  5035 0000DE0E 52                  <1> 	push	edx ; * ; new color
  5036 0000DE0F 89F1                <1> 	mov	ecx, esi ; win start pos
  5037 0000DE11 89FA                <1> 	mov	edx, edi ; size (rows, cols)
  5038 0000DE13 E8FFFBFFFF          <1> 	call	sysvideo_15_12 ; window preparations
  5039 0000DE18 58                  <1> 	pop	eax ; * ; new color
  5040 0000DE19 72EC                <1> 	jc	short pix_op_rpl_5
  5041                              <1> 
  5042                              <1> 	; replace window color
  5043                              <1> pix_op_rpl_w_0:
  5044                              <1> 	; ecx = bytes per row (to be applied)
  5045                              <1> 	; edx = screen width in bytes
  5046                              <1> 	; ebx = row count
  5047                              <1> 	; eax = new color
  5048                              <1> 	; [maskcolor] = old color
  5049                              <1>  
  5050 0000DE1B 8B3D[46100300]      <1> 	mov	edi, [v_str]
  5051                              <1> 
  5052 0000DE21 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5053 0000DE28 7707                <1> 	ja	short pix_op_rpl_w_1
  5054                              <1> 
  5055                              <1> 	; 256 colors (8bpp)
  5056 0000DE2A BD[0EE80000]        <1> 	mov	ebp, pix_op_rpl_8
  5057 0000DE2F EB1E                <1> 	jmp	short pix_op_rpl_w_4
  5058                              <1> 			
  5059                              <1> pix_op_rpl_w_1:
  5060 0000DE31 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5061 0000DE38 7710                <1> 	ja	short pix_op_rpl_w_3 ; 32bpp
  5062 0000DE3A 7207                <1> 	jb	short pix_op_rpl_w_2 ; 16bpp
  5063                              <1> 
  5064                              <1> 	; 24 bit true colors
  5065 0000DE3C BD[31E80000]        <1> 	mov	ebp, pix_op_rpl_24
  5066 0000DE41 EB0C                <1> 	jmp	short pix_op_rpl_w_4
  5067                              <1> 
  5068                              <1> 	; 65536 colors (16bpp)
  5069                              <1> pix_op_rpl_w_2:
  5070 0000DE43 BD[1EE80000]        <1> 	mov	ebp, pix_op_rpl_16
  5071 0000DE48 EB05                <1> 	jmp	short pix_op_rpl_w_4
  5072                              <1> 
  5073                              <1> 	; 32 bit true colors
  5074                              <1> pix_op_rpl_w_3:
  5075 0000DE4A BD[53E80000]        <1> 	mov	ebp, pix_op_rpl_32
  5076                              <1> pix_op_rpl_w_4:
  5077 0000DE4F E944FFFFFF          <1> 	jmp	pix_op_rpl_w_x
  5078                              <1> 
  5079                              <1> pix_op_orc:
  5080                              <1> 	; 31/01/2021
  5081                              <1> 	; OR COLOR
  5082                              <1> 	;
  5083                              <1> 	; INPUT:
  5084                              <1> 	;   CL = color (8 bit, 256 colors)
  5085                              <1> 	;  ECX = color (16 bit and true colors)
  5086                              <1> 	;  EDX = start position (row, column)
  5087                              <1> 	;        (HW = row, DX = column)
  5088                              <1> 	;  ESI = size (rows, colums)
  5089                              <1> 	;        (HW = rows, SI = columns)
  5090                              <1> 	;
  5091                              <1> 	;  [maskcolor] = mask color (to be excluded)
  5092                              <1> 	;
  5093                              <1> 	; OUTPUT:
  5094                              <1> 	; 	[u.r0] will be > 0 if succesful
  5095                              <1> 	
  5096 0000DE54 F605[3C100300]10    <1> 	test	byte [v_ops], 10h ; display page or window ?
  5097 0000DE5B 7555                <1> 	jnz	short pix_op_or_w ; window
  5098                              <1> 	
  5099 0000DE5D 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  5100 0000DE63 89FE                <1> 	mov	esi, edi
  5101                              <1> 	; ecx = color (CL, CX, ECX)
  5102 0000DE65 89C8                <1> 	mov	eax, ecx
  5103 0000DE67 8B0D[42100300]      <1> 	mov	ecx, [v_siz] ; display page pixel count
  5104                              <1> 
  5105 0000DE6D F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color 'or' ?
  5106 0000DE74 7405                <1> 	jz	short pix_op_or_0 ; no
  5107 0000DE76 E945110000          <1> 	jmp	m_pix_op_or ; 'or' color except mask color
  5108                              <1> pix_op_or_0:
  5109 0000DE7B 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5110 0000DE82 7707                <1> 	ja	short pix_op_or_1
  5111                              <1> 
  5112                              <1> 	; 256 colors (8bpp)
  5113 0000DE84 E81B080000          <1> 	call	pix_op_or_8
  5114 0000DE89 EB1E                <1> 	jmp	short pix_op_or_4	
  5115                              <1> 			
  5116                              <1> pix_op_or_1:
  5117 0000DE8B 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5118 0000DE92 7710                <1> 	ja	short pix_op_or_3 ; 32bpp	
  5119 0000DE94 7207                <1> 	jb	short pix_op_or_2 ; 16bpp
  5120                              <1> 	
  5121                              <1> 	; 24 bit true colors
  5122 0000DE96 E817080000          <1> 	call	pix_op_or_24
  5123 0000DE9B EB0C                <1> 	jmp	short pix_op_or_4
  5124                              <1> 
  5125                              <1> 	; 65536 colors (16bpp)
  5126                              <1> pix_op_or_2:
  5127 0000DE9D E808080000          <1> 	call	pix_op_or_16
  5128 0000DEA2 EB05                <1> 	jmp	short pix_op_or_4
  5129                              <1> 
  5130                              <1> 	; 32 bit true colors
  5131                              <1> pix_op_or_3:
  5132 0000DEA4 E818080000          <1> 	call	pix_op_or_32
  5133                              <1> pix_op_or_4:
  5134 0000DEA9 29F7                <1> 	sub	edi, esi
  5135 0000DEAB 893D[1C010300]      <1> 	mov	[u.r0], edi	
  5136                              <1> pix_op_or_5:
  5137 0000DEB1 C3                  <1> 	retn		
  5138                              <1> 
  5139                              <1> pix_op_or_w:
  5140                              <1> 	; 31/01/2021
  5141 0000DEB2 51                  <1> 	push	ecx ; * ; color
  5142 0000DEB3 89D1                <1> 	mov	ecx, edx ; win start pos
  5143 0000DEB5 89F2                <1> 	mov	edx, esi ; size (rows, cols)
  5144 0000DEB7 E85BFBFFFF          <1> 	call	sysvideo_15_12 ; window preparations
  5145 0000DEBC 58                  <1> 	pop	eax ; * ; color
  5146 0000DEBD 72F2                <1> 	jc	short pix_op_or_5
  5147                              <1> 
  5148 0000DEBF F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color 'or' ?
  5149 0000DEC6 7405                <1> 	jz	short pix_op_or_w_0 ; no
  5150 0000DEC8 E980110000          <1> 	jmp	m_pix_op_or_w 
  5151                              <1> 			; window 'or' color except mask color
  5152                              <1> pix_op_or_w_0:
  5153                              <1> 	; ecx = bytes per row (to be applied)
  5154                              <1> 	; edx = screen width in bytes
  5155                              <1> 	; ebx = row count
  5156                              <1> 	; eax = color
  5157                              <1> 
  5158 0000DECD 8B3D[46100300]      <1> 	mov	edi, [v_str]
  5159 0000DED3 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5160 0000DEDA 7707                <1> 	ja	short pix_op_or_w_1
  5161                              <1> 
  5162                              <1> 	; 256 colors (8bpp)
  5163 0000DEDC BD[A4E60000]        <1> 	mov	ebp, pix_op_or_8
  5164 0000DEE1 EB1E                <1> 	jmp	short pix_op_or_w_4
  5165                              <1> 			
  5166                              <1> pix_op_or_w_1:
  5167 0000DEE3 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5168 0000DEEA 7710                <1> 	ja	short pix_op_or_w_3 ; 32bpp
  5169 0000DEEC 7207                <1> 	jb	short pix_op_or_w_2 ; 16bpp
  5170                              <1> 
  5171                              <1> 	; 24 bit true colors
  5172 0000DEEE BD[B2E60000]        <1> 	mov	ebp, pix_op_or_24
  5173 0000DEF3 EB0C                <1> 	jmp	short pix_op_or_w_4
  5174                              <1> 
  5175                              <1> 	; 65536 colors (16bpp)
  5176                              <1> pix_op_or_w_2:
  5177 0000DEF5 BD[AAE60000]        <1> 	mov	ebp, pix_op_or_16
  5178 0000DEFA EB05                <1> 	jmp	short pix_op_or_w_4
  5179                              <1> 
  5180                              <1> 	; 32 bit true colors
  5181                              <1> pix_op_or_w_3:
  5182 0000DEFC BD[C1E60000]        <1> 	mov	ebp, pix_op_or_32
  5183                              <1> pix_op_or_w_4:
  5184 0000DF01 E992FEFFFF          <1> 	jmp	pix_op_orc_w_x
  5185                              <1> 
  5186                              <1> pix_op_and:
  5187                              <1> 	; 31/01/2021
  5188                              <1> 	; AND COLOR
  5189                              <1> 	;
  5190                              <1> 	; INPUT:
  5191                              <1> 	;   CL = color (8 bit, 256 colors)
  5192                              <1> 	;  ECX = color (16 bit and true colors)
  5193                              <1> 	;  EDX = start position (row, column)
  5194                              <1> 	;        (HW = row, DX = column)
  5195                              <1> 	;  ESI = size (rows, colums)
  5196                              <1> 	;        (HW = rows, SI = columns)
  5197                              <1> 	;
  5198                              <1> 	;  [maskcolor] = mask color (to be excluded)
  5199                              <1> 	;
  5200                              <1> 	; OUTPUT:
  5201                              <1> 	; 	[u.r0] will be > 0 if succesful
  5202                              <1> 	
  5203 0000DF06 F605[3C100300]10    <1> 	test	byte [v_ops], 10h ; display page or window ?
  5204 0000DF0D 7555                <1> 	jnz	short pix_op_and_w ; window
  5205                              <1> 	
  5206 0000DF0F 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  5207 0000DF15 89FE                <1> 	mov	esi, edi
  5208                              <1> 	; ecx = color (CL, CX, ECX)
  5209 0000DF17 89C8                <1> 	mov	eax, ecx
  5210 0000DF19 8B0D[42100300]      <1> 	mov	ecx, [v_siz] ; display page pixel count
  5211                              <1> 
  5212 0000DF1F F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color 'and' ?
  5213 0000DF26 7405                <1> 	jz	short pix_op_and_0 ; no
  5214 0000DF28 E9D30F0000          <1> 	jmp	m_pix_op_and ; 'and' color except mask color
  5215                              <1> pix_op_and_0:
  5216 0000DF2D 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5217 0000DF34 7707                <1> 	ja	short pix_op_and_1
  5218                              <1> 
  5219                              <1> 	; 256 colors (8bpp)
  5220 0000DF36 E88E070000          <1> 	call	pix_op_and_8
  5221 0000DF3B EB1E                <1> 	jmp	short pix_op_and_4	
  5222                              <1> 			
  5223                              <1> pix_op_and_1:
  5224 0000DF3D 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5225 0000DF44 7710                <1> 	ja	short pix_op_and_3 ; 32bpp	
  5226 0000DF46 7207                <1> 	jb	short pix_op_and_2 ; 16bpp
  5227                              <1> 	
  5228                              <1> 	; 24 bit true colors
  5229 0000DF48 E88A070000          <1> 	call	pix_op_and_24
  5230 0000DF4D EB0C                <1> 	jmp	short pix_op_and_4
  5231                              <1> 
  5232                              <1> 	; 65536 colors (16bpp)
  5233                              <1> pix_op_and_2:
  5234 0000DF4F E87B070000          <1> 	call	pix_op_and_16
  5235 0000DF54 EB05                <1> 	jmp	short pix_op_and_4
  5236                              <1> 
  5237                              <1> 	; 32 bit true colors
  5238                              <1> pix_op_and_3:
  5239 0000DF56 E88B070000          <1> 	call	pix_op_and_32
  5240                              <1> pix_op_and_4:
  5241 0000DF5B 29F7                <1> 	sub	edi, esi
  5242 0000DF5D 893D[1C010300]      <1> 	mov	[u.r0], edi	
  5243                              <1> pix_op_and_5:
  5244 0000DF63 C3                  <1> 	retn		
  5245                              <1> 
  5246                              <1> pix_op_and_w:
  5247                              <1> 	; 31/01/2021
  5248 0000DF64 51                  <1> 	push	ecx ; * ; color
  5249 0000DF65 89D1                <1> 	mov	ecx, edx ; win start pos
  5250 0000DF67 89F2                <1> 	mov	edx, esi ; size (rows, cols)
  5251 0000DF69 E8A9FAFFFF          <1> 	call	sysvideo_15_12 ; window preparations
  5252 0000DF6E 58                  <1> 	pop	eax ; * ; color
  5253 0000DF6F 72F2                <1> 	jc	short pix_op_and_5
  5254                              <1> 
  5255 0000DF71 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color 'and' ?
  5256 0000DF78 7405                <1> 	jz	short pix_op_and_w_0 ; no
  5257 0000DF7A E90E100000          <1> 	jmp	m_pix_op_and_w 
  5258                              <1> 			; window 'and' color except mask color
  5259                              <1> pix_op_and_w_0:
  5260                              <1> 	; ecx = bytes per row (to be applied)
  5261                              <1> 	; edx = screen width in bytes
  5262                              <1> 	; ebx = row count
  5263                              <1> 	; eax = color
  5264                              <1> 
  5265 0000DF7F 8B3D[46100300]      <1> 	mov	edi, [v_str]
  5266 0000DF85 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5267 0000DF8C 7707                <1> 	ja	short pix_op_and_w_1
  5268                              <1> 
  5269                              <1> 	; 256 colors (8bpp)
  5270 0000DF8E BD[C9E60000]        <1> 	mov	ebp, pix_op_and_8
  5271 0000DF93 EB1E                <1> 	jmp	short pix_op_and_w_4
  5272                              <1> 			
  5273                              <1> pix_op_and_w_1:
  5274 0000DF95 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5275 0000DF9C 7710                <1> 	ja	short pix_op_and_w_3 ; 32bpp
  5276 0000DF9E 7207                <1> 	jb	short pix_op_and_w_2 ; 16bpp
  5277                              <1> 
  5278                              <1> 	; 24 bit true colors
  5279 0000DFA0 BD[D7E60000]        <1> 	mov	ebp, pix_op_and_24
  5280 0000DFA5 EB0C                <1> 	jmp	short pix_op_and_w_4
  5281                              <1> 
  5282                              <1> 	; 65536 colors (16bpp)
  5283                              <1> pix_op_and_w_2:
  5284 0000DFA7 BD[CFE60000]        <1> 	mov	ebp, pix_op_and_16
  5285 0000DFAC EB05                <1> 	jmp	short pix_op_and_w_4
  5286                              <1> 
  5287                              <1> 	; 32 bit true colors
  5288                              <1> pix_op_and_w_3:
  5289 0000DFAE BD[E6E60000]        <1> 	mov	ebp, pix_op_and_32
  5290                              <1> pix_op_and_w_4:
  5291 0000DFB3 E9E0FDFFFF          <1> 	jmp	pix_op_and_w_x
  5292                              <1> 
  5293                              <1> pix_op_xor:
  5294                              <1> 	; 31/01/2021
  5295                              <1> 	; XOR COLOR
  5296                              <1> 	;
  5297                              <1> 	; INPUT:
  5298                              <1> 	;   CL = color (8 bit, 256 colors)
  5299                              <1> 	;  ECX = color (16 bit and true colors)
  5300                              <1> 	;  EDX = start position (row, column)
  5301                              <1> 	;        (HW = row, DX = column)
  5302                              <1> 	;  ESI = size (rows, colums)
  5303                              <1> 	;        (HW = rows, SI = columns)
  5304                              <1> 	;
  5305                              <1> 	;  [maskcolor] = mask color (to be excluded)
  5306                              <1> 	;
  5307                              <1> 	; OUTPUT:
  5308                              <1> 	; 	[u.r0] will be > 0 if succesful
  5309                              <1> 	
  5310 0000DFB8 F605[3C100300]10    <1> 	test	byte [v_ops], 10h ; display page or window ?
  5311 0000DFBF 7555                <1> 	jnz	short pix_op_xor_w ; window
  5312                              <1> 	
  5313 0000DFC1 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  5314 0000DFC7 89FE                <1> 	mov	esi, edi
  5315                              <1> 	; ecx = color (CL, CX, ECX)
  5316 0000DFC9 89C8                <1> 	mov	eax, ecx
  5317 0000DFCB 8B0D[42100300]      <1> 	mov	ecx, [v_siz] ; display page pixel count
  5318                              <1> 
  5319 0000DFD1 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color 'xor' ?
  5320 0000DFD8 7405                <1> 	jz	short pix_op_xor_0 ; no
  5321 0000DFDA E9A1100000          <1> 	jmp	m_pix_op_xor ; 'xor' color except mask color
  5322                              <1> pix_op_xor_0:
  5323 0000DFDF 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5324 0000DFE6 7707                <1> 	ja	short pix_op_xor_1
  5325                              <1> 
  5326                              <1> 	; 256 colors (8bpp)
  5327 0000DFE8 E801070000          <1> 	call	pix_op_xor_8
  5328 0000DFED EB1E                <1> 	jmp	short pix_op_xor_4	
  5329                              <1> 			
  5330                              <1> pix_op_xor_1:
  5331 0000DFEF 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5332 0000DFF6 7710                <1> 	ja	short pix_op_xor_3 ; 32bpp	
  5333 0000DFF8 7207                <1> 	jb	short pix_op_xor_2 ; 16bpp
  5334                              <1> 	
  5335                              <1> 	; 24 bit true colors
  5336 0000DFFA E8FD060000          <1> 	call	pix_op_xor_24
  5337 0000DFFF EB0C                <1> 	jmp	short pix_op_xor_4
  5338                              <1> 
  5339                              <1> 	; 65536 colors (16bpp)
  5340                              <1> pix_op_xor_2:
  5341 0000E001 E8EE060000          <1> 	call	pix_op_xor_16
  5342 0000E006 EB05                <1> 	jmp	short pix_op_xor_4
  5343                              <1> 
  5344                              <1> 	; 32 bit true colors
  5345                              <1> pix_op_xor_3:
  5346 0000E008 E8FE060000          <1> 	call	pix_op_xor_32
  5347                              <1> pix_op_xor_4:
  5348 0000E00D 29F7                <1> 	sub	edi, esi
  5349 0000E00F 893D[1C010300]      <1> 	mov	[u.r0], edi	
  5350                              <1> pix_op_xor_5:
  5351 0000E015 C3                  <1> 	retn		
  5352                              <1> 
  5353                              <1> pix_op_xor_w:
  5354                              <1> 	; 31/01/2021
  5355 0000E016 51                  <1> 	push	ecx ; * ; color
  5356 0000E017 89D1                <1> 	mov	ecx, edx ; win start pos
  5357 0000E019 89F2                <1> 	mov	edx, esi ; size (rows, cols)
  5358 0000E01B E8F7F9FFFF          <1> 	call	sysvideo_15_12 ; window preparations
  5359 0000E020 58                  <1> 	pop	eax ; * ; color
  5360 0000E021 72F2                <1> 	jc	short pix_op_xor_5
  5361                              <1> 
  5362 0000E023 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color 'xor' ?
  5363 0000E02A 7405                <1> 	jz	short pix_op_xor_w_0 ; no
  5364 0000E02C E9DC100000          <1> 	jmp	m_pix_op_xor_w 
  5365                              <1> 			; window 'xor' color except mask color
  5366                              <1> pix_op_xor_w_0:
  5367                              <1> 	; ecx = bytes per row (to be applied)
  5368                              <1> 	; edx = screen width in bytes
  5369                              <1> 	; ebx = row count
  5370                              <1> 	; eax = color
  5371                              <1> 
  5372 0000E031 8B3D[46100300]      <1> 	mov	edi, [v_str]
  5373 0000E037 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5374 0000E03E 7707                <1> 	ja	short pix_op_xor_w_1
  5375                              <1> 
  5376                              <1> 	; 256 colors (8bpp)
  5377 0000E040 BD[EEE60000]        <1> 	mov	ebp, pix_op_xor_8
  5378 0000E045 EB1E                <1> 	jmp	short pix_op_xor_w_4
  5379                              <1> 			
  5380                              <1> pix_op_xor_w_1:
  5381 0000E047 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5382 0000E04E 7710                <1> 	ja	short pix_op_xor_w_3 ; 32bpp
  5383 0000E050 7207                <1> 	jb	short pix_op_xor_w_2 ; 16bpp
  5384                              <1> 
  5385                              <1> 	; 24 bit true colors
  5386 0000E052 BD[FCE60000]        <1> 	mov	ebp, pix_op_xor_24
  5387 0000E057 EB0C                <1> 	jmp	short pix_op_xor_w_4
  5388                              <1> 
  5389                              <1> 	; 65536 colors (16bpp)
  5390                              <1> pix_op_xor_w_2:
  5391 0000E059 BD[F4E60000]        <1> 	mov	ebp, pix_op_xor_16
  5392 0000E05E EB05                <1> 	jmp	short pix_op_xor_w_4
  5393                              <1> 
  5394                              <1> 	; 32 bit true colors
  5395                              <1> pix_op_xor_w_3:
  5396 0000E060 BD[0BE70000]        <1> 	mov	ebp, pix_op_xor_32
  5397                              <1> pix_op_xor_w_4:
  5398 0000E065 E92EFDFFFF          <1> 	jmp	pix_op_xor_w_x
  5399                              <1> 
  5400                              <1> pix_op_new:
  5401                              <1> 	; 31/01/2021
  5402                              <1> 	; 30/01/2021
  5403                              <1> 	; CHANGE COLOR
  5404                              <1> 	;
  5405                              <1> 	; INPUT:
  5406                              <1> 	;   CL = color (8 bit, 256 colors)
  5407                              <1> 	;  ECX = color (16 bit and true colors)
  5408                              <1> 	;  EDX = start position (row, column)
  5409                              <1> 	;        (HW = row, DX = column)
  5410                              <1> 	;  ESI = size (rows, colums)
  5411                              <1> 	;        (HW = rows, SI = columns)
  5412                              <1> 	;
  5413                              <1> 	;  [maskcolor] = mask color (to be excluded)
  5414                              <1> 	;
  5415                              <1> 	; OUTPUT:
  5416                              <1> 	; 	[u.r0] will be > 0 if succesful
  5417                              <1> 	
  5418 0000E06A F605[3C100300]10    <1> 	test	byte [v_ops], 10h ; display page or window ?
  5419 0000E071 7554                <1> 	jnz	short pix_op_new_w ; window
  5420                              <1> 	
  5421 0000E073 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  5422 0000E079 89FE                <1> 	mov	esi, edi
  5423                              <1> 	; ecx = color (CL, CX, ECX)
  5424 0000E07B 89C8                <1> 	mov	eax, ecx
  5425 0000E07D 8B0D[42100300]      <1> 	mov	ecx, [v_siz] ; display page pixel count
  5426                              <1> 
  5427 0000E083 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color change ?
  5428 0000E08A 7405                <1> 	jz	short pix_op_new_0 ; no
  5429 0000E08C E90A0B0000          <1> 	jmp	m_pix_op_new ; change color except mask color
  5430                              <1> pix_op_new_0:
  5431 0000E091 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5432 0000E098 7706                <1> 	ja	short pix_op_new_2
  5433                              <1> 
  5434                              <1> 	; 256 colors (8bpp)
  5435                              <1> pix_op_new_1:
  5436 0000E09A 88C4                <1> 	mov	ah, al
  5437 0000E09C D1E9                <1> 	shr	ecx, 1	
  5438 0000E09E EB12                <1> 	jmp	short pix_op_new_3
  5439                              <1> 			
  5440                              <1> pix_op_new_2:
  5441 0000E0A0 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5442 0000E0A7 7713                <1> 	ja	short pix_op_new_4 ; 32bpp	
  5443 0000E0A9 7207                <1> 	jb	short pix_op_new_3 ; 16bpp
  5444                              <1> 
  5445                              <1> 	; 31/01/2021
  5446                              <1> 	
  5447                              <1> 	; 24 bit true colors
  5448 0000E0AB E849050000          <1> 	call	pix_op_new_24
  5449                              <1> 
  5450 0000E0B0 EB0C                <1> 	jmp	short pix_op_new_5
  5451                              <1> 
  5452                              <1> 	; 65536 colors (16bpp)
  5453                              <1> pix_op_new_3:
  5454 0000E0B2 89C2                <1> 	mov	edx, eax
  5455 0000E0B4 C1E010              <1> 	shl	eax, 16
  5456 0000E0B7 6689D0              <1> 	mov	ax, dx
  5457 0000E0BA D1E9                <1> 	shr	ecx, 1 ; dword counts
  5458                              <1> 	; 32 bit true colors	
  5459                              <1> pix_op_new_4:
  5460 0000E0BC F3AB                <1> 	rep	stosd
  5461                              <1> pix_op_new_5:
  5462 0000E0BE 29F7                <1> 	sub	edi, esi
  5463 0000E0C0 893D[1C010300]      <1> 	mov	[u.r0], edi	
  5464                              <1> pix_op_new_6:
  5465 0000E0C6 C3                  <1> 	retn		
  5466                              <1> 
  5467                              <1> pix_op_new_w:
  5468                              <1> 	; 31/01/2021
  5469                              <1> 	; 30/01/2021
  5470 0000E0C7 51                  <1> 	push	ecx ; * ; color
  5471 0000E0C8 89D1                <1> 	mov	ecx, edx ; win start pos
  5472 0000E0CA 89F2                <1> 	mov	edx, esi ; size (rows, cols)
  5473 0000E0CC E846F9FFFF          <1> 	call	sysvideo_15_12 ; window preparations
  5474 0000E0D1 58                  <1> 	pop	eax ; * ; color
  5475 0000E0D2 72F2                <1> 	jc	short pix_op_new_6
  5476                              <1> 
  5477 0000E0D4 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color change ?
  5478 0000E0DB 7405                <1> 	jz	short pix_op_new_w_0 ; no
  5479 0000E0DD E9470B0000          <1> 	jmp	m_pix_op_new_w 
  5480                              <1> 			; window chg color except mask color
  5481                              <1> pix_op_new_w_0:
  5482                              <1> 	; ecx = bytes per row (to be applied)
  5483                              <1> 	; edx = screen width in bytes
  5484                              <1> 	; ebx = row count
  5485                              <1> 	; eax = color
  5486                              <1> 
  5487 0000E0E2 8B3D[46100300]      <1> 	mov	edi, [v_str]
  5488                              <1> 
  5489 0000E0E8 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5490 0000E0EF 7707                <1> 	ja	short pix_op_new_w_1
  5491                              <1> 
  5492                              <1> 	; 256 colors (8bpp)
  5493 0000E0F1 BD[F2E50000]        <1> 	mov	ebp, pix_op_new_8
  5494 0000E0F6 EB1E                <1> 	jmp	short pix_op_new_w_x
  5495                              <1> 			
  5496                              <1> pix_op_new_w_1:
  5497 0000E0F8 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5498 0000E0FF 7710                <1> 	ja	short pix_op_new_w_3 ; 32bpp
  5499 0000E101 7207                <1> 	jb	short pix_op_new_w_2 ; 16bpp
  5500                              <1> 
  5501                              <1> 	; 24 bit true colors
  5502 0000E103 BD[F9E50000]        <1> 	mov	ebp, pix_op_new_24
  5503 0000E108 EB0C                <1> 	jmp	short pix_op_new_w_x
  5504                              <1> 
  5505                              <1> 	; 65536 colors (16bpp)
  5506                              <1> pix_op_new_w_2:
  5507 0000E10A BD[F5E50000]        <1> 	mov	ebp, pix_op_new_16
  5508 0000E10F EB05                <1> 	jmp	short pix_op_new_w_x
  5509                              <1> 
  5510                              <1> 	; 32 bit true colors
  5511                              <1> pix_op_new_w_3:
  5512 0000E111 BD[05E60000]        <1> 	mov	ebp, pix_op_new_32
  5513                              <1> 	;jmp	short pix_op_new_w_x
  5514                              <1> 
  5515                              <1> pix_op_new_w_x:
  5516                              <1> pix_op_not_w_x:
  5517                              <1> pix_op_neg_w_x:
  5518                              <1> pix_op_inc_w_x:
  5519                              <1> pix_op_dec_w_x:
  5520                              <1> 	; 27/02/2021
  5521                              <1> 	; 01/02/2021
  5522                              <1> 	; 31/01/2021
  5523                              <1> 	; ecx = bytes per row (to be applied)
  5524                              <1> 	; edx = windows (screen) width in bytes
  5525                              <1> 	; ebx = row count
  5526                              <1> 	; eax = color
  5527                              <1> 	; ebp = pixel operation subroutine address
  5528                              <1> 	;push	edx ; 01/02/2021
  5529 0000E116 51                  <1> 	push	ecx
  5530 0000E117 57                  <1> 	push	edi
  5531 0000E118 8B0D[52100300]      <1> 	mov	ecx, [pixcount] ; 27/02/2021
  5532 0000E11E FFD5                <1> 	call	ebp ; call pixel-row operation
  5533 0000E120 5F                  <1> 	pop	edi
  5534 0000E121 59                  <1> 	pop	ecx ; bytes per row
  5535 0000E122 010D[1C010300]      <1> 	add	[u.r0], ecx
  5536                              <1> 	;pop	edx ; 01/02/2021
  5537 0000E128 01D7                <1> 	add	edi, edx ; next row
  5538 0000E12A 4B                  <1> 	dec	ebx
  5539 0000E12B 75E9                <1> 	jnz	short pix_op_new_w_x
  5540 0000E12D C3                  <1> 	retn
  5541                              <1> 
  5542                              <1> pix_op_not:
  5543                              <1> 	; 31/01/2021
  5544                              <1> 	; NOT COLOR
  5545                              <1> 	;
  5546                              <1> 	; INPUT:
  5547                              <1> 	;  ECX = start position (row, column)
  5548                              <1> 	;        (HW = row, CX = column)
  5549                              <1> 	;  EDX = size (rows, colums)
  5550                              <1> 	;        (HW = rows, DX = columns)
  5551                              <1> 	;	 (0 -> invalid 	
  5552                              <1> 	;        (1 -> horizontal or vertical line)
  5553                              <1> 	;  [maskcolor] = mask color (to be excluded)
  5554                              <1> 	;
  5555                              <1> 	; OUTPUT:
  5556                              <1> 	; 	[u.r0] will be > 0 if succesful
  5557                              <1> 	
  5558 0000E12E F605[3C100300]10    <1> 	test	byte [v_ops], 10h ; display page or window ?
  5559 0000E135 7553                <1> 	jnz	short pix_op_not_w ; window
  5560                              <1> 	
  5561 0000E137 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  5562 0000E13D 89FE                <1> 	mov	esi, edi
  5563 0000E13F 8B0D[42100300]      <1> 	mov	ecx, [v_siz] ; display page pixel count
  5564                              <1> 
  5565 0000E145 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color 'not' ?
  5566 0000E14C 7405                <1> 	jz	short pix_op_not_0 ; no
  5567 0000E14E E9ED0F0000          <1> 	jmp	m_pix_op_not ; 'not' color except mask color
  5568                              <1> pix_op_not_0:
  5569 0000E153 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5570 0000E15A 7707                <1> 	ja	short pix_op_not_1
  5571                              <1> 
  5572                              <1> 	; 256 colors (8bpp)
  5573 0000E15C E8F5050000          <1> 	call	pix_op_not_8
  5574 0000E161 EB1E                <1> 	jmp	short pix_op_not_4
  5575                              <1> 			
  5576                              <1> pix_op_not_1:
  5577 0000E163 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5578 0000E16A 7710                <1> 	ja	short pix_op_not_3 ; 32bpp	
  5579 0000E16C 7207                <1> 	jb	short pix_op_not_2 ; 16bpp
  5580                              <1> 
  5581                              <1> 	; 24 bit true colors
  5582 0000E16E E8F1050000          <1> 	call	pix_op_not_24
  5583 0000E173 EB0C                <1> 	jmp	short pix_op_not_4
  5584                              <1> 
  5585                              <1> 	; 65536 colors (16bpp)
  5586                              <1> pix_op_not_2:
  5587 0000E175 E8E2050000          <1> 	call	pix_op_not_16
  5588 0000E17A EB05                <1> 	jmp	short pix_op_not_4
  5589                              <1> 
  5590                              <1> 	; 32 bit true colors	
  5591                              <1> pix_op_not_3:
  5592 0000E17C E8EE050000          <1> 	call	pix_op_not_32
  5593                              <1> pix_op_not_4:
  5594 0000E181 29F7                <1> 	sub	edi, esi
  5595 0000E183 893D[1C010300]      <1> 	mov	[u.r0], edi	
  5596                              <1> pix_op_not_5:
  5597 0000E189 C3                  <1> 	retn
  5598                              <1> 
  5599                              <1> pix_op_not_w:
  5600                              <1> 	; 31/01/2021
  5601                              <1> 	; ecx = win start pos (row, column)
  5602                              <1> 	; edx = size (rows, columns)
  5603 0000E18A E888F8FFFF          <1> 	call	sysvideo_15_12 ; window preparations
  5604 0000E18F 72F8                <1> 	jc	short pix_op_not_5
  5605                              <1> 
  5606 0000E191 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked color 'not' ?
  5607 0000E198 7405                <1> 	jz	short pix_op_not_w_0 ; no
  5608 0000E19A E926100000          <1> 	jmp	m_pix_op_not_w 
  5609                              <1> 			; window 'not' color except mask color
  5610                              <1> pix_op_not_w_0:
  5611                              <1> 	; ecx = bytes per row (to be applied)
  5612                              <1> 	; edx = screen width in bytes
  5613                              <1> 	; ebx = row count
  5614                              <1> 
  5615 0000E19F 8B3D[46100300]      <1> 	mov	edi, [v_str]
  5616                              <1> 
  5617 0000E1A5 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5618 0000E1AC 7707                <1> 	ja	short pix_op_not_w_1
  5619                              <1> 
  5620                              <1> 	; 256 colors (8bpp)
  5621 0000E1AE BD[56E70000]        <1> 	mov	ebp, pix_op_not_8
  5622 0000E1B3 EB1E                <1> 	jmp	short pix_op_not_w_4
  5623                              <1> 			
  5624                              <1> pix_op_not_w_1:
  5625 0000E1B5 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5626 0000E1BC 7710                <1> 	ja	short pix_op_not_w_3 ; 32bpp
  5627 0000E1BE 7207                <1> 	jb	short pix_op_not_w_2 ; 16bpp
  5628                              <1> 
  5629                              <1> 	; 24 bit true colors
  5630 0000E1C0 BD[64E70000]        <1> 	mov	ebp, pix_op_not_24
  5631 0000E1C5 EB0C                <1> 	jmp	short pix_op_not_w_4
  5632                              <1> 
  5633                              <1> 	; 65536 colors (16bpp)
  5634                              <1> pix_op_not_w_2:
  5635 0000E1C7 BD[5CE70000]        <1> 	mov	ebp, pix_op_not_16
  5636 0000E1CC EB05                <1> 	jmp	short pix_op_not_w_4
  5637                              <1> 
  5638                              <1> 	; 32 bit true colors
  5639                              <1> pix_op_not_w_3:
  5640 0000E1CE BD[6FE70000]        <1> 	mov	ebp, pix_op_not_32
  5641                              <1> pix_op_not_w_4:
  5642 0000E1D3 E93EFFFFFF          <1> 	jmp	pix_op_not_w_x
  5643                              <1> 
  5644                              <1> pix_op_neg:
  5645                              <1> 	; 31/01/2021
  5646                              <1> 	; NEGATE COLOR
  5647                              <1> 	;
  5648                              <1> 	; INPUT:
  5649                              <1> 	;  ECX = start position (row, column)
  5650                              <1> 	;        (HW = row, CX = column)
  5651                              <1> 	;  EDX = size (rows, colums)
  5652                              <1> 	;        (HW = rows, DX = columns)
  5653                              <1> 	;	 (0 -> invalid 	
  5654                              <1> 	;        (1 -> horizontal or vertical line)
  5655                              <1> 	;  [maskcolor] = mask color (to be excluded)
  5656                              <1> 	;
  5657                              <1> 	; OUTPUT:
  5658                              <1> 	; 	[u.r0] will be > 0 if succesful
  5659                              <1> 	
  5660 0000E1D8 F605[3C100300]10    <1> 	test	byte [v_ops], 10h ; display page or window ?
  5661 0000E1DF 7553                <1> 	jnz	short pix_op_neg_w ; window
  5662                              <1> 	
  5663 0000E1E1 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  5664 0000E1E7 89FE                <1> 	mov	esi, edi
  5665 0000E1E9 8B0D[42100300]      <1> 	mov	ecx, [v_siz] ; display page pixel count
  5666                              <1> 
  5667 0000E1EF F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked negate color ?
  5668 0000E1F6 7405                <1> 	jz	short pix_op_neg_0 ; no
  5669 0000E1F8 E9FB0F0000          <1> 	jmp	m_pix_op_neg ; 'neg' color except mask color
  5670                              <1> pix_op_neg_0:
  5671 0000E1FD 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5672 0000E204 7707                <1> 	ja	short pix_op_neg_1
  5673                              <1> 
  5674                              <1> 	; 256 colors (8bpp)
  5675 0000E206 E86C050000          <1> 	call	pix_op_neg_8
  5676 0000E20B EB1E                <1> 	jmp	short pix_op_neg_4
  5677                              <1> 			
  5678                              <1> pix_op_neg_1:
  5679 0000E20D 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5680 0000E214 7710                <1> 	ja	short pix_op_neg_3 ; 32bpp	
  5681 0000E216 7207                <1> 	jb	short pix_op_neg_2 ; 16bpp
  5682                              <1> 
  5683                              <1> 	; 24 bit true colors
  5684 0000E218 E868050000          <1> 	call	pix_op_neg_24
  5685 0000E21D EB0C                <1> 	jmp	short pix_op_neg_4
  5686                              <1> 
  5687                              <1> 	; 65536 colors (16bpp)
  5688                              <1> pix_op_neg_2:
  5689 0000E21F E859050000          <1> 	call	pix_op_neg_16
  5690 0000E224 EB05                <1> 	jmp	short pix_op_neg_4
  5691                              <1> 
  5692                              <1> 	; 32 bit true colors	
  5693                              <1> pix_op_neg_3:
  5694 0000E226 E86C050000          <1> 	call	pix_op_neg_32
  5695                              <1> pix_op_neg_4:
  5696 0000E22B 29F7                <1> 	sub	edi, esi
  5697 0000E22D 893D[1C010300]      <1> 	mov	[u.r0], edi	
  5698                              <1> pix_op_neg_5:
  5699 0000E233 C3                  <1> 	retn
  5700                              <1> 
  5701                              <1> pix_op_neg_w:
  5702                              <1> 	; 31/01/2021
  5703                              <1> 	; ecx = win start pos (row, column)
  5704                              <1> 	; edx = size (rows, columns)
  5705 0000E234 E8DEF7FFFF          <1> 	call	sysvideo_15_12 ; window preparations
  5706 0000E239 72F8                <1> 	jc	short pix_op_neg_5
  5707                              <1> 
  5708 0000E23B F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked negate color ?
  5709 0000E242 7405                <1> 	jz	short pix_op_neg_w_0 ; no
  5710 0000E244 E934100000          <1> 	jmp	m_pix_op_neg_w 
  5711                              <1> 			; window 'neg' color except mask color
  5712                              <1> pix_op_neg_w_0:
  5713                              <1> 	; ecx = bytes per row (to be applied)
  5714                              <1> 	; edx = screen width in bytes
  5715                              <1> 	; ebx = row count
  5716                              <1> 
  5717 0000E249 8B3D[46100300]      <1> 	mov	edi, [v_str]
  5718                              <1> 
  5719 0000E24F 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5720 0000E256 7707                <1> 	ja	short pix_op_neg_w_1
  5721                              <1> 
  5722                              <1> 	; 256 colors (8bpp)
  5723 0000E258 BD[77E70000]        <1> 	mov	ebp, pix_op_neg_8
  5724 0000E25D EB1E                <1> 	jmp	short pix_op_neg_w_4
  5725                              <1> 			
  5726                              <1> pix_op_neg_w_1:
  5727 0000E25F 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5728 0000E266 7710                <1> 	ja	short pix_op_neg_w_3 ; 32bpp
  5729 0000E268 7207                <1> 	jb	short pix_op_neg_w_2 ; 16bpp
  5730                              <1> 
  5731                              <1> 	; 24 bit true colors
  5732 0000E26A BD[85E70000]        <1> 	mov	ebp, pix_op_neg_24
  5733 0000E26F EB0C                <1> 	jmp	short pix_op_neg_w_4
  5734                              <1> 
  5735                              <1> 	; 65536 colors (16bpp)
  5736                              <1> pix_op_neg_w_2:
  5737 0000E271 BD[7DE70000]        <1> 	mov	ebp, pix_op_neg_16
  5738 0000E276 EB05                <1> 	jmp	short pix_op_neg_w_4
  5739                              <1> 
  5740                              <1> 	; 32 bit true colors
  5741                              <1> pix_op_neg_w_3:
  5742 0000E278 BD[97E70000]        <1> 	mov	ebp, pix_op_neg_32
  5743                              <1> pix_op_neg_w_4:
  5744 0000E27D E994FEFFFF          <1> 	jmp	pix_op_neg_w_x
  5745                              <1> 
  5746                              <1> pix_op_inc:
  5747                              <1> 	; 31/01/2021
  5748                              <1> 	; INCREASE COLOR
  5749                              <1> 	;
  5750                              <1> 	; INPUT:
  5751                              <1> 	;  ECX = start position (row, column)
  5752                              <1> 	;        (HW = row, CX = column)
  5753                              <1> 	;  EDX = size (rows, colums)
  5754                              <1> 	;        (HW = rows, DX = columns)
  5755                              <1> 	;	 (0 -> invalid 	
  5756                              <1> 	;        (1 -> horizontal or vertical line)
  5757                              <1> 	;  [maskcolor] = mask color (to be excluded)
  5758                              <1> 	;
  5759                              <1> 	; OUTPUT:
  5760                              <1> 	; 	[u.r0] will be > 0 if succesful
  5761                              <1> 	
  5762 0000E282 F605[3C100300]10    <1> 	test	byte [v_ops], 10h ; display page or window ?
  5763 0000E289 7553                <1> 	jnz	short pix_op_inc_w ; window
  5764                              <1> 	
  5765 0000E28B 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  5766 0000E291 89FE                <1> 	mov	esi, edi
  5767 0000E293 8B0D[42100300]      <1> 	mov	ecx, [v_siz] ; display page pixel count
  5768                              <1> 
  5769 0000E299 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked increase color ?
  5770 0000E2A0 7405                <1> 	jz	short pix_op_inc_0 ; no
  5771 0000E2A2 E909100000          <1> 	jmp	m_pix_op_inc ; 'inc' color except mask color
  5772                              <1> pix_op_inc_0:
  5773 0000E2A7 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5774 0000E2AE 7707                <1> 	ja	short pix_op_inc_1
  5775                              <1> 
  5776                              <1> 	; 256 colors (8bpp)
  5777 0000E2B0 E8EA040000          <1> 	call	pix_op_inc_8
  5778 0000E2B5 EB1E                <1> 	jmp	short pix_op_inc_4
  5779                              <1> 			
  5780                              <1> pix_op_inc_1:
  5781 0000E2B7 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5782 0000E2BE 7710                <1> 	ja	short pix_op_inc_3 ; 32bpp	
  5783 0000E2C0 7207                <1> 	jb	short pix_op_inc_2 ; 16bpp
  5784                              <1> 
  5785                              <1> 	; 24 bit true colors
  5786 0000E2C2 E8EF040000          <1> 	call	pix_op_inc_24
  5787 0000E2C7 EB0C                <1> 	jmp	short pix_op_inc_4
  5788                              <1> 
  5789                              <1> 	; 65536 colors (16bpp)
  5790                              <1> pix_op_inc_2:
  5791 0000E2C9 E8DB040000          <1> 	call	pix_op_inc_16
  5792 0000E2CE EB05                <1> 	jmp	short pix_op_inc_4
  5793                              <1> 
  5794                              <1> 	; 32 bit true colors	
  5795                              <1> pix_op_inc_3:
  5796 0000E2D0 E8F5040000          <1> 	call	pix_op_inc_32
  5797                              <1> pix_op_inc_4:
  5798 0000E2D5 29F7                <1> 	sub	edi, esi
  5799 0000E2D7 893D[1C010300]      <1> 	mov	[u.r0], edi	
  5800                              <1> pix_op_inc_5:
  5801 0000E2DD C3                  <1> 	retn			
  5802                              <1> 
  5803                              <1> pix_op_inc_w:
  5804                              <1> 	; 31/01/2021
  5805                              <1> 	; ecx = win start pos (row, column)
  5806                              <1> 	; edx = size (rows, columns)
  5807 0000E2DE E834F7FFFF          <1> 	call	sysvideo_15_12 ; window preparations
  5808 0000E2E3 72F8                <1> 	jc	short pix_op_inc_5
  5809                              <1> 
  5810 0000E2E5 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked increase color ?
  5811 0000E2EC 7405                <1> 	jz	short pix_op_inc_w_0 ; no
  5812 0000E2EE E956100000          <1> 	jmp	m_pix_op_inc_w 
  5813                              <1> 			; window 'inc' color except mask color
  5814                              <1> pix_op_inc_w_0:
  5815                              <1> 	; ecx = bytes per row (to be applied)
  5816                              <1> 	; edx = screen width in bytes
  5817                              <1> 	; ebx = row count
  5818                              <1> 
  5819 0000E2F3 8B3D[46100300]      <1> 	mov	edi, [v_str]
  5820                              <1> 
  5821 0000E2F9 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5822 0000E300 7707                <1> 	ja	short pix_op_inc_w_1
  5823                              <1> 
  5824                              <1> 	; 256 colors (8bpp)
  5825 0000E302 BD[9FE70000]        <1> 	mov	ebp, pix_op_inc_8
  5826 0000E307 EB1E                <1> 	jmp	short pix_op_inc_w_4
  5827                              <1> 			
  5828                              <1> pix_op_inc_w_1:
  5829 0000E309 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5830 0000E310 7710                <1> 	ja	short pix_op_inc_w_3 ; 32bpp
  5831 0000E312 7207                <1> 	jb	short pix_op_inc_w_2 ; 16bpp
  5832                              <1> 
  5833                              <1> 	; 24 bit true colors
  5834 0000E314 BD[B6E70000]        <1> 	mov	ebp, pix_op_inc_24
  5835 0000E319 EB0C                <1> 	jmp	short pix_op_inc_w_4
  5836                              <1> 
  5837                              <1> 	; 65536 colors (16bpp)
  5838                              <1> pix_op_inc_w_2:
  5839 0000E31B BD[A9E70000]        <1> 	mov	ebp, pix_op_inc_16
  5840 0000E320 EB05                <1> 	jmp	short pix_op_inc_w_4
  5841                              <1> 
  5842                              <1> 	; 32 bit true colors
  5843                              <1> pix_op_inc_w_3:
  5844 0000E322 BD[CAE70000]        <1> 	mov	ebp, pix_op_inc_32
  5845                              <1> pix_op_inc_w_4:
  5846 0000E327 E9EAFDFFFF          <1> 	jmp	pix_op_inc_w_x
  5847                              <1> 
  5848                              <1> pix_op_dec:
  5849                              <1> 	; 31/01/2021
  5850                              <1> 	; DECREASE COLOR
  5851                              <1> 	;
  5852                              <1> 	; INPUT:
  5853                              <1> 	;  ECX = start position (row, column)
  5854                              <1> 	;        (HW = row, CX = column)
  5855                              <1> 	;  EDX = size (rows, colums)
  5856                              <1> 	;        (HW = rows, DX = columns)
  5857                              <1> 	;	 (0 -> invalid 	
  5858                              <1> 	;        (1 -> horizontal or vertical line)
  5859                              <1> 	;  [maskcolor] = mask color (to be excluded)
  5860                              <1> 	;
  5861                              <1> 	; OUTPUT:
  5862                              <1> 	; 	[u.r0] will be > 0 if succesful
  5863                              <1> 	
  5864 0000E32C F605[3C100300]10    <1> 	test	byte [v_ops], 10h ; display page or window ?
  5865 0000E333 7553                <1> 	jnz	short pix_op_dec_w ; window
  5866                              <1> 	
  5867 0000E335 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  5868 0000E33B 89FE                <1> 	mov	esi, edi
  5869 0000E33D 8B0D[42100300]      <1> 	mov	ecx, [v_siz] ; display page pixel count
  5870                              <1> 
  5871 0000E343 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked decrease color ?
  5872 0000E34A 7405                <1> 	jz	short pix_op_dec_0 ; no
  5873 0000E34C E92B100000          <1> 	jmp	m_pix_op_dec ; 'dec' color except mask color
  5874                              <1> pix_op_dec_0:
  5875 0000E351 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5876 0000E358 7707                <1> 	ja	short pix_op_dec_1
  5877                              <1> 
  5878                              <1> 	; 256 colors (8bpp)
  5879 0000E35A E877040000          <1> 	call	pix_op_dec_8
  5880 0000E35F EB1E                <1> 	jmp	short pix_op_dec_4
  5881                              <1> 			
  5882                              <1> pix_op_dec_1:
  5883 0000E361 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5884 0000E368 7710                <1> 	ja	short pix_op_dec_3 ; 32bpp	
  5885 0000E36A 7207                <1> 	jb	short pix_op_dec_2 ; 16bpp
  5886                              <1> 
  5887                              <1> 	; 24 bit true colors
  5888 0000E36C E87C040000          <1> 	call	pix_op_dec_24
  5889 0000E371 EB0C                <1> 	jmp	short pix_op_dec_4
  5890                              <1> 
  5891                              <1> 	; 65536 colors (16bpp)
  5892                              <1> pix_op_dec_2:
  5893 0000E373 E868040000          <1> 	call	pix_op_dec_16
  5894 0000E378 EB05                <1> 	jmp	short pix_op_dec_4
  5895                              <1> 
  5896                              <1> 	; 32 bit true colors	
  5897                              <1> pix_op_dec_3:
  5898 0000E37A E881040000          <1> 	call	pix_op_dec_32
  5899                              <1> pix_op_dec_4:
  5900 0000E37F 29F7                <1> 	sub	edi, esi
  5901 0000E381 893D[1C010300]      <1> 	mov	[u.r0], edi	
  5902                              <1> pix_op_dec_5:
  5903 0000E387 C3                  <1> 	retn			
  5904                              <1> 
  5905                              <1> pix_op_dec_w:
  5906                              <1> 	; 31/01/2021
  5907                              <1> 	; ecx = win start pos (row, column)
  5908                              <1> 	; edx = size (rows, columns)
  5909 0000E388 E88AF6FFFF          <1> 	call	sysvideo_15_12 ; window preparations
  5910 0000E38D 72F8                <1> 	jc	short pix_op_dec_5
  5911                              <1> 
  5912 0000E38F F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked decrease color ?
  5913 0000E396 7405                <1> 	jz	short pix_op_dec_w_0 ; no
  5914 0000E398 E973100000          <1> 	jmp	m_pix_op_dec_w 
  5915                              <1> 			; window 'dec' color except mask color
  5916                              <1> pix_op_dec_w_0:
  5917                              <1> 	; ecx = bytes per row (to be applied)
  5918                              <1> 	; edx = screen width in bytes
  5919                              <1> 	; ebx = row count
  5920                              <1> 
  5921 0000E39D 8B3D[46100300]      <1> 	mov	edi, [v_str]
  5922                              <1> 
  5923 0000E3A3 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  5924 0000E3AA 7707                <1> 	ja	short pix_op_dec_w_1
  5925                              <1> 
  5926                              <1> 	; 256 colors (8bpp)
  5927 0000E3AC BD[D6E70000]        <1> 	mov	ebp, pix_op_dec_8
  5928 0000E3B1 EB1E                <1> 	jmp	short pix_op_dec_w_4
  5929                              <1> 			
  5930                              <1> pix_op_dec_w_1:
  5931 0000E3B3 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  5932 0000E3BA 7710                <1> 	ja	short pix_op_dec_w_3 ; 32bpp
  5933 0000E3BC 7207                <1> 	jb	short pix_op_dec_w_2 ; 16bpp
  5934                              <1> 
  5935                              <1> 	; 24 bit true colors
  5936 0000E3BE BD[EDE70000]        <1> 	mov	ebp, pix_op_dec_24
  5937 0000E3C3 EB0C                <1> 	jmp	short pix_op_dec_w_4
  5938                              <1> 
  5939                              <1> 	; 65536 colors (16bpp)
  5940                              <1> pix_op_dec_w_2:
  5941 0000E3C5 BD[E0E70000]        <1> 	mov	ebp, pix_op_dec_16
  5942 0000E3CA EB05                <1> 	jmp	short pix_op_dec_w_4
  5943                              <1> 
  5944                              <1> 	; 32 bit true colors
  5945                              <1> pix_op_dec_w_3:
  5946 0000E3CC BD[00E80000]        <1> 	mov	ebp, pix_op_dec_32
  5947                              <1> pix_op_dec_w_4:
  5948 0000E3D1 E940FDFFFF          <1> 	jmp	pix_op_dec_w_x
  5949                              <1> 
  5950                              <1> pix_op_blk:
  5951                              <1> 	; 11/08/2022 (TRDOS 386 Kernel v2.0.5)
  5952                              <1> 	; 23/01/2021
  5953                              <1> 	; 22/02/2021
  5954                              <1> 	; 02/02/2021
  5955                              <1> 	; COPY PIXEL BLOCK -system to system-
  5956                              <1> 	; WRITE PIXEL BLOCKS -user to system-
  5957                              <1> 	;
  5958                              <1> 	; INPUT:
  5959                              <1> 	;   -If BL bit 5 is 0-	
  5960                              <1> 	;    ECX = start position (row, column) (*)
  5961                              <1> 	;    (HW = row, CX = column)
  5962                              <1> 	;    EDX = size (rows, colums) (*)
  5963                              <1> 	;    (HW = rows, DX = columns)
  5964                              <1> 	;         (0 -> invalid)
  5965                              <1> 	;         (1 -> horizontal or vertical line)
  5966                              <1> 	;    ESI = destination (row, column) (***)
  5967                              <1> 	;   -If BL bit 5 is 1-	
  5968                              <1> 	;     CL = color (8 bit, 256 colors)
  5969                              <1> 	;    ECX = color (16 bit and true colors)
  5970                              <1> 	;    EDX = count of blocks (not bytes)
  5971                              <1> 	;	 (limit: 2048 blocks/windows)	  	
  5972                              <1> 	;    ESI = user's buffer address 
  5973                              <1> 	;	  contains 64 bit block data
  5974                              <1> 	;	  BLOCK ADDRESS - (row, col), dword
  5975                              <1> 	;	  (first 32 bits)
  5976                              <1> 	;	  BLOCK SIZE - (rows, cols), dword
  5977                              <1> 	;	  (second 32 bits)
  5978                              <1> 	; OUTPUT:
  5979                              <1> 	; 	[u.r0] will be > 0 if succesful
  5980                              <1> 
  5981                              <1> 	; Window option ([v_ops] bit 4) will be ignored  	
  5982                              <1> 	; (Function is used for display page coordinates)
  5983                              <1> 
  5984 0000E3D6 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked or direct ?
  5985 0000E3DD 755A                <1> 	jnz	short pix_op_blk_u ; blocks from user's buffer
  5986                              <1> 
  5987 0000E3DF 89F0                <1> 	mov	eax, esi ; destination position (row, col)
  5988 0000E3E1 E8DEF6FFFF          <1> 	call	calc_pixel_offset
  5989 0000E3E6 3B05[42100300]      <1> 	cmp	eax, [v_siz]
  5990 0000E3EC 734A                <1> 	jnb	short pix_op_blk_retn ; out of display page
  5991 0000E3EE 89C6                <1> 	mov	esi, eax
  5992 0000E3F0 E8ACF6FFFF          <1> 	call	pixels_to_byte_count
  5993 0000E3F5 89C7                <1> 	mov	edi, eax
  5994 0000E3F7 89D0                <1> 	mov	eax, edx  ; size
  5995 0000E3F9 E8C6F6FFFF          <1> 	call	calc_pixel_offset
  5996                              <1> 	; 22/02/2021
  5997 0000E3FE 3B05[42100300]      <1> 	cmp	eax, [v_siz]
  5998 0000E404 7732                <1> 	ja	short pix_op_blk_retn ; out of display page
  5999 0000E406 01C6                <1> 	add	esi, eax
  6000 0000E408 3B35[42100300]      <1> 	cmp	esi, [v_siz]
  6001 0000E40E 7728                <1> 	ja	short pix_op_blk_retn ; out of display page
  6002                              <1> 
  6003 0000E410 033D[3E100300]      <1> 	add	edi, [v_mem] ; destination address
  6004                              <1> 	
  6005                              <1> 	; 23/01/2021
  6006                              <1> 	;call	pixels_to_byte_count
  6007                              <1> 	;add	edi, eax
  6008                              <1> 	;jc	short pix_op_blk_retn ; out of display page
  6009                              <1> 	;cmp	edi, [v_end]
  6010                              <1> 	;ja	short pix_op_blk_retn ; out of display page
  6011                              <1> 	;sub	edi, eax
  6012                              <1> 
  6013 0000E416 E8FCF5FFFF          <1> 	call	sysvideo_15_12 ; window preparations
  6014 0000E41B 721B                <1> 	jc	short pix_op_blk_retn ; something wrong !?
  6015                              <1> 	; ecx = bytes per row (to be applied)
  6016                              <1> 	; edx = screen width in bytes
  6017                              <1> 	; ebx = row count
  6018                              <1> 
  6019 0000E41D 8B35[46100300]      <1> 	mov	esi, [v_str] ; source address
  6020                              <1> 
  6021                              <1> 	; Note:
  6022                              <1> 	; ecx & edx are already adjusted for pixel sizes
  6023                              <1> 	; so, following code is proper all pixel sizes
  6024                              <1> 
  6025 0000E423 29CA                <1> 	sub	edx, ecx ; screen width - window width
  6026                              <1> pix_op_blk_0:
  6027 0000E425 89C8                <1> 	mov	eax, ecx
  6028 0000E427 0105[1C010300]      <1> 	add	[u.r0], eax
  6029 0000E42D F3A4                <1> 	rep	movsb
  6030 0000E42F 89C1                <1> 	mov	ecx, eax	
  6031 0000E431 01D6                <1> 	add	esi, edx ; next row
  6032 0000E433 01D7                <1> 	add	edi, edx ; next row
  6033 0000E435 4B                  <1> 	dec	ebx
  6034 0000E436 75ED                <1> 	jnz	short pix_op_blk_0
  6035                              <1> pix_op_blk_retn:
  6036 0000E438 C3                  <1> 	retn
  6037                              <1> 
  6038                              <1> pix_op_blk_u:
  6039                              <1> 	; fill blocks (windows) with desired color
  6040                              <1> 	; according to block definitions in user's buffer
  6041 0000E439 81FA00080000        <1> 	cmp	edx, 2048
  6042 0000E43F 7605                <1> 	jna	short pix_op_blk_u_0
  6043                              <1> 	; Maximum 2048 blocks
  6044 0000E441 BA00080000          <1> 	mov	edx, 2048
  6045                              <1> pix_op_blk_u_0:
  6046 0000E446 8025[3C100300]DF    <1> 	and	byte [v_ops], ~20h ; clear masked bit
  6047 0000E44D 890D[4E100300]      <1> 	mov	[maskcolor], ecx ; save pixel color
  6048                              <1> 	; 22/02/2021
  6049                              <1> 	;mov	ebp, edx ; save blocks count
  6050                              <1> 	;push	ebp
  6051                              <1> pix_op_blk_u_next:
  6052 0000E453 52                  <1> 	push	edx
  6053                              <1> 	;mov	ecx, 8
  6054                              <1> 	; 11/08/2022
  6055 0000E454 29C9                <1> 	sub	ecx, ecx
  6056 0000E456 B108                <1> 	mov	cl, 8
  6057 0000E458 BF[56100300]        <1> 	mov	edi, buffer8 ; 8 bytes small buffer
  6058                              <1> 	; esi = user's buffer address
  6059 0000E45D E891290000          <1> 	call	transfer_from_user_buffer
  6060 0000E462 72D4                <1> 	jc	short pix_op_blk_retn
  6061 0000E464 01CE                <1> 	add	esi, ecx ; 22/02/2021
  6062 0000E466 56                  <1> 	push	esi
  6063 0000E467 8B15[56100300]      <1> 	mov	edx, [buffer8] ; block start pos (row,col)
  6064 0000E46D 8B35[5A100300]      <1> 	mov	esi, [buffer8+4] ; block size (rows,cols)
  6065 0000E473 8B0D[4E100300]      <1> 	mov	ecx, [maskcolor]
  6066 0000E479 E849FCFFFF          <1> 	call	pix_op_new_w ; new (change) color (window)
  6067 0000E47E 5E                  <1> 	pop	esi
  6068                              <1> 	;pop	ebp
  6069                              <1> 	;dec	ebp
  6070 0000E47F 5A                  <1> 	pop	edx
  6071 0000E480 4A                  <1> 	dec	edx
  6072 0000E481 75D0                <1> 	jnz	short pix_op_blk_u_next
  6073 0000E483 C3                  <1> 	retn
  6074                              <1> 
  6075                              <1> pix_op_lin:
  6076                              <1> 	; 11/08/2022
  6077                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
  6078                              <1> 	; 12/02/2021
  6079                              <1> 	; 11/02/2021
  6080                              <1> 	; 10/02/2021
  6081                              <1> 	; 05/02/2021
  6082                              <1> 	; 02/02/2021
  6083                              <1> 	; WRITE LINE -direct-
  6084                              <1> 	; WRITE LINE(S) -via user's buffer-
  6085                              <1> 	;
  6086                              <1> 	; INPUT:
  6087                              <1> 	;   -If BL bit 5 is 0-	
  6088                              <1> 	;     CL = color (8 bit, 256 colors)
  6089                              <1> 	;    ECX = color (16 bit and true colors)
  6090                              <1> 	;     DX = low 12 bits - size (length)
  6091                              <1> 	;	   high 4 bits - direction or type
  6092                              <1> 	;	     0 - Horizontal line
  6093                              <1> 	;	     1 - Vertical line
  6094                              <1> 	;	   > 1 - undefined, invalid
  6095                              <1> 	;    ESI = start position (row, column)
  6096                              <1> 	;	  (HW = row, SI = column)
  6097                              <1> 	;   -If BL bit 5 is 1-
  6098                              <1> 	;     CL = color (8 bit, 256 colors)
  6099                              <1> 	;    ECX = color (16 bit and true colors)
  6100                              <1> 	;     DX = number of lines (in user buffer)
  6101                              <1> 	;	   (limit: 2048 lines)	
  6102                              <1> 	;    ESI = user's buffer
  6103                              <1> 	;          contains 64 bit data for lines
  6104                              <1> 	;	   START POINT: 32 bit (row, col)
  6105                              <1> 	;	   LENGTH: 32 bit
  6106                              <1> 	;		   high 16 bits - 0
  6107                              <1> 	;		   bit 0-11 - length
  6108                              <1> 	;	   	   bit 12-15 - type (length)
  6109                              <1> 	; OUTPUT:
  6110                              <1> 	; 	[u.r0] will be > 0 if succesful
  6111                              <1> 
  6112                              <1> 	; Window option ([v_ops] bit 4) will be ignored
  6113                              <1> 	; (Function is used for display page coordinates)
  6114                              <1> 
  6115                              <1> 	; 10/02/2021
  6116 0000E484 F605[3C100300]20    <1> 	test	byte [v_ops], 20h ; masked or direct ?
  6117 0000E48B 7444                <1> 	jz	short pix_op_lin_vh ; direct (v/h lines) 
  6118                              <1> 
  6119                              <1> 	; lines from user's buffer
  6120                              <1> pix_op_lin_u:
  6121                              <1> 	; draw lines with desired color
  6122                              <1> 	; according to line definitions in user's buffer
  6123 0000E48D 81FA00080000        <1> 	cmp	edx, 2048
  6124 0000E493 7605                <1> 	jna	short pix_op_lin_u_0
  6125                              <1> 	; Maximum 2048 lines
  6126 0000E495 BA00080000          <1> 	mov	edx, 2048
  6127                              <1> pix_op_lin_u_0:
  6128 0000E49A 890D[4E100300]      <1> 	mov	[maskcolor], ecx ; save pixel color
  6129 0000E4A0 89D5                <1> 	mov	ebp, edx ; save line count
  6130                              <1> pix_op_lin_u_next:
  6131                              <1> 	;mov	ecx, 8
  6132                              <1> 	; 11/08/2022
  6133 0000E4A2 29C9                <1> 	sub	ecx, ecx
  6134 0000E4A4 B108                <1> 	mov	cl, 8
  6135 0000E4A6 BF[56100300]        <1> 	mov	edi, buffer8 ; 8 bytes small buffer
  6136                              <1> 	; esi = user's buffer address
  6137 0000E4AB E843290000          <1> 	call	transfer_from_user_buffer
  6138 0000E4B0 721E                <1> 	jc	short pix_op_lin_retn
  6139 0000E4B2 01CE                <1> 	add	esi, ecx ; 11/02/2021
  6140 0000E4B4 56                  <1> 	push	esi
  6141 0000E4B5 8B35[56100300]      <1> 	mov	esi, [buffer8] ; line start pos (row,col)
  6142 0000E4BB 8B15[5A100300]      <1> 	mov	edx, [buffer8+4] ; line length
  6143 0000E4C1 8B0D[4E100300]      <1> 	mov	ecx, [maskcolor]
  6144 0000E4C7 E805000000          <1> 	call	pix_op_lin_vh ; new (change) color (window)
  6145 0000E4CC 5E                  <1> 	pop	esi
  6146 0000E4CD 4D                  <1> 	dec	ebp
  6147 0000E4CE 75D2                <1> 	jnz	short pix_op_lin_u_next
  6148                              <1> pix_op_lin_retn:
  6149 0000E4D0 C3                  <1> 	retn
  6150                              <1> 
  6151                              <1> pix_op_lin_vh:
  6152 0000E4D1 81FA38140000        <1> 	cmp	edx, 1438h ; 1920*1080 (780hx438h) limit
  6153 0000E4D7 7762                <1> 	ja	short pix_op_lin_err1 ; invalid type 
  6154                              <1> 			    	; (for current version)
  6155 0000E4D9 66F7C2FF0F          <1> 	test	dx, 0FFFh
  6156 0000E4DE 745B                <1> 	jz	short pix_op_lin_err1 ; zero length!
  6157                              <1> 
  6158 0000E4E0 89F0                <1> 	mov	eax, esi ; start point (row, col)
  6159 0000E4E2 E8DDF5FFFF          <1> 	call	calc_pixel_offset
  6160 0000E4E7 3B05[42100300]      <1> 	cmp	eax, [v_siz]
  6161 0000E4ED 734C                <1> 	jnb	short pix_op_lin_err1 ; out of display page!
  6162 0000E4EF E8ADF5FFFF          <1> 	call	pixels_to_byte_count
  6163 0000E4F4 89C7                <1> 	mov	edi, eax ; start point offset
  6164 0000E4F6 033D[3E100300]      <1> 	add	edi, [v_mem] ; LFB start address
  6165 0000E4FC 89C8                <1> 	mov	eax, ecx ; color
  6166                              <1> 
  6167 0000E4FE F6C610              <1> 	test	dh, 10h
  6168                              <1> 	;jz	pix_op_lin_h ; Horizontal line
  6169                              <1> 	; 23/07/2022
  6170 0000E501 7505                <1> 	jnz	short pix_op_lin_v
  6171 0000E503 E98A000000          <1> 	jmp	pix_op_lin_h
  6172                              <1> 
  6173                              <1> pix_op_lin_v:
  6174                              <1> 	; Vertical line
  6175 0000E508 80E60F              <1> 	and 	dh, 0Fh ; low 12 bits
  6176 0000E50B 51                  <1> 	push	ecx ; color
  6177 0000E50C 89D1                <1> 	mov	ecx, edx
  6178 0000E50E 0FB705[3A100300]    <1> 	movzx	eax, word [v_width]
  6179 0000E515 89C3                <1> 	mov	ebx, eax
  6180                              <1> 	; 12/02/2021
  6181 0000E517 F7E2                <1> 	mul	edx ; rows * [v_width]
  6182 0000E519 01F8                <1> 	add	eax, edi
  6183 0000E51B 3B05[4A100300]      <1> 	cmp	eax, [v_end]
  6184 0000E521 58                  <1> 	pop	eax ; color
  6185 0000E522 7717                <1> 	ja	short pix_op_lin_err1 ; out of display page
  6186                              <1> 	; ecx = rows	
  6187 0000E524 89CA                <1> 	mov	edx, ecx
  6188                              <1> 
  6189 0000E526 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  6190 0000E52D 770D                <1> 	ja	short pix_op_lin_v_2
  6191                              <1> 	; 256 colors (1 byte per pixel)
  6192 0000E52F 010D[1C010300]      <1> 	add	[u.r0], ecx ; byte count
  6193                              <1> pix_op_lin_v_1:
  6194 0000E535 8807                <1> 	mov	[edi], al
  6195 0000E537 01DF                <1> 	add	edi, ebx  ; next row	
  6196 0000E539 E2FA                <1> 	loop	pix_op_lin_v_1
  6197                              <1> pix_op_lin_err1:
  6198 0000E53B C3                  <1> 	retn
  6199                              <1> 
  6200                              <1> pix_op_lin_v_2:
  6201 0000E53C 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  6202 0000E543 773A                <1> 	ja	short pix_op_lin_v_6 ; 32bpp
  6203 0000E545 7226                <1> 	jb	short pix_op_lin_v_4 ; 16bpp
  6204                              <1> 	
  6205                              <1> 	; 24 bit true colors
  6206                              <1> 	; * 3
  6207 0000E547 53                  <1> 	push	ebx ; screen width in pixels
  6208 0000E548 D1E3                <1> 	shl	ebx, 1
  6209 0000E54A 011C24              <1> 	add	[esp], ebx
  6210 0000E54D 5B                  <1> 	pop	ebx ; screen width in bytes
  6211 0000E54E 010D[1C010300]      <1> 	add	[u.r0], ecx
  6212 0000E554 D1E2                <1> 	shl	edx, 1
  6213 0000E556 0115[1C010300]      <1> 	add	[u.r0], edx ; byte count
  6214                              <1> pix_op_lin_v_3:
  6215 0000E55C 668907              <1> 	mov	[edi], ax
  6216 0000E55F C1C810              <1> 	ror	eax, 16
  6217 0000E562 884702              <1> 	mov	[edi+2], al	
  6218 0000E565 C1C010              <1> 	rol	eax, 16
  6219 0000E568 01DF                <1> 	add	edi, ebx  ; next row	
  6220 0000E56A E2F0                <1> 	loop	pix_op_lin_v_3
  6221 0000E56C C3                  <1> 	retn
  6222                              <1> 
  6223                              <1> pix_op_lin_v_4:
  6224                              <1> 	; 16 bit (65536) colors
  6225 0000E56D D1E3                <1> 	shl	ebx, 1
  6226 0000E56F D1E2                <1> 	shl	edx, 1
  6227 0000E571 0115[1C010300]      <1> 	add	[u.r0], edx
  6228                              <1> pix_op_lin_v_5:
  6229 0000E577 668907              <1> 	mov	[edi], ax
  6230 0000E57A 01DF                <1> 	add	edi, ebx  ; next row	
  6231 0000E57C E2F9                <1> 	loop	pix_op_lin_v_5
  6232 0000E57E C3                  <1> 	retn
  6233                              <1> 
  6234                              <1> pix_op_lin_v_6:
  6235                              <1> 	; 32 bit true colors
  6236 0000E57F C1E302              <1> 	shl	ebx, 2
  6237 0000E582 C1E202              <1> 	shl	edx, 2
  6238 0000E585 0115[1C010300]      <1> 	add	[u.r0], edx ; byte count
  6239                              <1> pix_op_lin_v_7:
  6240 0000E58B 8907                <1> 	mov	[edi], eax
  6241 0000E58D 01DF                <1> 	add	edi, ebx  ; next row	
  6242 0000E58F E2FA                <1> 	loop	pix_op_lin_v_7
  6243 0000E591 C3                  <1> 	retn		
  6244                              <1> 
  6245                              <1> pix_op_lin_h:
  6246                              <1> 	; Horizontal line
  6247 0000E592 80E60F              <1> 	and 	dh, 0Fh ; low 12 bits
  6248 0000E595 89D1                <1>   	mov	ecx, edx
  6249 0000E597 6601D6              <1> 	add	si, dx ; start column + columns
  6250 0000E59A 663B35[3A100300]    <1> 	cmp	si, [v_width] ; screen width
  6251 0000E5A1 7711                <1> 	ja	short pix_op_lin_err2 ; out of columns limit
  6252                              <1> 
  6253 0000E5A3 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  6254 0000E5AA 7709                <1> 	ja	short pix_op_lin_h_1
  6255                              <1> 	; 256 colors (1 byte per pixel)
  6256 0000E5AC 010D[1C010300]      <1> 	add	[u.r0], ecx
  6257 0000E5B2 F3AA                <1> 	rep	stosb
  6258                              <1> pix_op_lin_err2:
  6259 0000E5B4 C3                  <1> 	retn
  6260                              <1> 
  6261                              <1> pix_op_lin_h_1:
  6262 0000E5B5 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  6263 0000E5BC 7728                <1> 	ja	short pix_op_lin_h_4 ; 32bpp
  6264 0000E5BE 721A                <1> 	jb	short pix_op_lin_h_3 ; 16bpp
  6265                              <1> 	
  6266                              <1> 	; 24 bit true colors
  6267                              <1> 	; * 3
  6268 0000E5C0 0115[1C010300]      <1> 	add	[u.r0], edx
  6269 0000E5C6 D1E2                <1> 	shl	edx, 1
  6270 0000E5C8 0115[1C010300]      <1> 	add	[u.r0], edx
  6271                              <1> pix_op_lin_h_2:
  6272 0000E5CE 66AB                <1> 	stosw
  6273 0000E5D0 C1C810              <1> 	ror	eax, 16
  6274 0000E5D3 AA                  <1> 	stosb	
  6275 0000E5D4 C1C010              <1> 	rol	eax, 16
  6276 0000E5D7 E2F5                <1> 	loop	pix_op_lin_h_2
  6277 0000E5D9 C3                  <1> 	retn
  6278                              <1> 
  6279                              <1> pix_op_lin_h_3:
  6280                              <1> 	; 16 bit (65536) colors
  6281 0000E5DA D1E2                <1> 	shl	edx, 1
  6282 0000E5DC 0115[1C010300]      <1> 	add	[u.r0], edx
  6283 0000E5E2 F366AB              <1> 	rep	stosw
  6284 0000E5E5 C3                  <1> 	retn
  6285                              <1> 
  6286                              <1> pix_op_lin_h_4:
  6287                              <1> 	; 32 bit true colors
  6288 0000E5E6 C1E202              <1> 	shl	edx, 2
  6289 0000E5E9 0115[1C010300]      <1> 	add	[u.r0], edx
  6290 0000E5EF F3AB                <1> 	rep	stosd
  6291 0000E5F1 C3                  <1> 	retn
  6292                              <1> 
  6293                              <1> pix_op_new_8:
  6294                              <1> 	; 8 bit colors (256 colors)
  6295                              <1> 	; CHANGE PIXEL COLOR
  6296                              <1> 	; ecx = pixel count per row
  6297                              <1> 	;  al = color
  6298                              <1> 	; edi = start pixel address 
  6299                              <1> 
  6300 0000E5F2 F3AA                <1> 	rep	stosb
  6301 0000E5F4 C3                  <1> 	retn
  6302                              <1> 
  6303                              <1> pix_op_new_16:
  6304                              <1> 	; 16 bit colors (65536 colors)
  6305                              <1> 	; CHANGE PIXEL COLOR
  6306                              <1> 	; ecx = pixel count per row
  6307                              <1> 	;  ax = color
  6308                              <1> 	; edi = start pixel address 
  6309                              <1> 
  6310 0000E5F5 F366AB              <1> 	rep	stosw
  6311 0000E5F8 C3                  <1> 	retn
  6312                              <1> 
  6313                              <1> pix_op_new_24:
  6314                              <1> 	; 24 bit true colors
  6315                              <1> 	; CHANGE PIXEL COLOR
  6316                              <1> 	; ecx = pixel count per row
  6317                              <1> 	; eax = color
  6318                              <1> 	; edi = start pixel address 
  6319                              <1> 
  6320 0000E5F9 66AB                <1> 	stosw
  6321 0000E5FB C1C810              <1> 	ror	eax, 16	
  6322 0000E5FE AA                  <1> 	stosb
  6323 0000E5FF C1C010              <1> 	rol	eax, 16
  6324 0000E602 E2F5                <1> 	loop	pix_op_new_24
  6325 0000E604 C3                  <1> 	retn
  6326                              <1> 
  6327                              <1> pix_op_new_32:
  6328                              <1> 	; 32 bit true colors
  6329                              <1> 	; CHANGE PIXEL COLOR
  6330                              <1> 	; ecx = pixel count per row
  6331                              <1> 	; eax = color
  6332                              <1> 	; edi = start pixel address 
  6333                              <1> 
  6334 0000E605 F3AB                <1> 	rep	stosd
  6335 0000E607 C3                  <1> 	retn
  6336                              <1> 
  6337                              <1> pix_op_add_8:
  6338                              <1> 	; 8 bit colors (256 colors)
  6339                              <1> 	; ADD PIXEL COLOR
  6340                              <1> 	; ecx = pixel count per row
  6341                              <1> 	;  al = color
  6342                              <1> 	; edi = start pixel address 
  6343                              <1> 
  6344 0000E608 88C4                <1> 	mov	ah, al
  6345                              <1> pix_op_add_8_0:
  6346 0000E60A 0207                <1> 	add	al, [edi]
  6347 0000E60C 7302                <1> 	jnc	short pix_op_add_8_1
  6348 0000E60E B0FF                <1> 	mov	al, 0FFh ; Max. value	
  6349                              <1> pix_op_add_8_1:
  6350 0000E610 AA                  <1> 	stosb
  6351 0000E611 88E0                <1> 	mov	al, ah
  6352 0000E613 E2F5                <1> 	loop	pix_op_add_8_0
  6353 0000E615 C3                  <1> 	retn
  6354                              <1> 
  6355                              <1> pix_op_add_16:
  6356                              <1> 	; 16 bit colors (65536 colors)
  6357                              <1> 	; ADD PIXEL COLOR
  6358                              <1> 	; ecx = pixel count per row
  6359                              <1> 	;  ax = color
  6360                              <1> 	; edi = start pixel address 
  6361                              <1> 
  6362 0000E616 89C2                <1> 	mov	edx, eax
  6363                              <1> pix_op_add_16_0:
  6364 0000E618 660307              <1> 	add	ax, [edi]
  6365 0000E61B 7304                <1> 	jnc	short pix_op_add_16_1
  6366 0000E61D 66B8FFFF            <1> 	mov	ax, 0FFFFh ; Max. value	
  6367                              <1> pix_op_add_16_1:
  6368 0000E621 66AB                <1> 	stosw
  6369 0000E623 89D0                <1> 	mov	eax, edx
  6370 0000E625 E2F1                <1> 	loop	pix_op_add_16_0
  6371 0000E627 C3                  <1> 	retn
  6372                              <1> 
  6373                              <1> pix_op_add_24:
  6374                              <1> 	; 24 bit true colors
  6375                              <1> 	; ADD PIXEL COLOR
  6376                              <1> 	; ecx = pixel count per row
  6377                              <1> 	; eax = color
  6378                              <1> 	; edi = start pixel address 
  6379                              <1> 
  6380 0000E628 53                  <1> 	push	ebx
  6381 0000E629 BBFFFFFF00          <1> 	mov	ebx, 0FFFFFFh
  6382                              <1> 	;and	eax, ebx ; 0FFFFFFh
  6383 0000E62E 89C2                <1> 	mov	edx, eax
  6384                              <1> pix_op_add_24_0:
  6385 0000E630 8B07                <1> 	mov	eax, [edi]
  6386 0000E632 21D8                <1> 	and	eax, ebx ; 0FFFFFFh
  6387 0000E634 01D0                <1> 	add	eax, edx
  6388 0000E636 39D8                <1> 	cmp	eax, ebx
  6389 0000E638 7602                <1> 	jna	short pix_op_add_24_1
  6390 0000E63A 89D8                <1> 	mov	eax, ebx ; 0FFFFFFh  ; Max. value
  6391                              <1> pix_op_add_24_1: 
  6392 0000E63C 66AB                <1> 	stosw
  6393 0000E63E C1E810              <1> 	shr	eax, 16
  6394 0000E641 AA                  <1> 	stosb
  6395 0000E642 E2EC                <1> 	loop	pix_op_add_24_0
  6396 0000E644 89D0                <1> 	mov	eax, edx
  6397 0000E646 5B                  <1> 	pop	ebx
  6398 0000E647 C3                  <1> 	retn
  6399                              <1> 
  6400                              <1> pix_op_add_32:
  6401                              <1> 	; 32 bit true colors
  6402                              <1> 	; ADD PIXEL COLOR
  6403                              <1> 	; ecx = pixel count per row
  6404                              <1> 	; eax = color
  6405                              <1> 	; edi = start pixel address 
  6406                              <1> 
  6407 0000E648 89C2                <1> 	mov	edx, eax
  6408                              <1> pix_op_add_32_0:
  6409 0000E64A 0307                <1> 	add	eax, [edi]
  6410 0000E64C 7303                <1> 	jnc	short pix_op_add_32_1
  6411                              <1> 	;mov	eax, 0FFFFFFFFh ; Max. value
  6412 0000E64E 29C0                <1> 	sub	eax, eax
  6413 0000E650 48                  <1> 	dec	eax	
  6414                              <1> pix_op_add_32_1:
  6415 0000E651 AB                  <1> 	stosd
  6416 0000E652 89D0                <1> 	mov	eax, edx
  6417 0000E654 E2F4                <1> 	loop	pix_op_add_32_0
  6418 0000E656 C3                  <1> 	retn
  6419                              <1> 
  6420                              <1> pix_op_sub_8:
  6421                              <1> 	; 8 bit colors (256 colors)
  6422                              <1> 	; SUBTRACT PIXEL COLOR
  6423                              <1> 	; ecx = pixel count per row
  6424                              <1> 	;  al = color
  6425                              <1> 	; edi = start pixel address 
  6426                              <1> 
  6427 0000E657 88C4                <1> 	mov	ah, al
  6428                              <1> pix_op_sub_8_0:
  6429 0000E659 8A07                <1> 	mov	al, [edi]
  6430 0000E65B 28E0                <1> 	sub	al, ah
  6431 0000E65D 7302                <1> 	jnb	short pix_op_sub_8_1
  6432 0000E65F 30C0                <1> 	xor	al, al ; 0 ; Min. value	
  6433                              <1> pix_op_sub_8_1:
  6434 0000E661 AA                  <1> 	stosb
  6435 0000E662 E2F5                <1> 	loop	pix_op_sub_8_0
  6436 0000E664 88E0                <1> 	mov	al, ah
  6437 0000E666 C3                  <1> 	retn
  6438                              <1> 
  6439                              <1> pix_op_sub_16:
  6440                              <1> 	; 16 bit colors (65536 colors)
  6441                              <1> 	; SUBTRACT PIXEL COLOR
  6442                              <1> 	; ecx = pixel count per row
  6443                              <1> 	;  ax = color
  6444                              <1> 	; edi = start pixel address 
  6445                              <1> 
  6446 0000E667 89C2                <1> 	mov	edx, eax
  6447                              <1> pix_op_sub_16_0:
  6448 0000E669 668B07              <1> 	mov	ax, [edi]
  6449 0000E66C 6629D0              <1> 	sub	ax, dx
  6450 0000E66F 7302                <1> 	jnb	short pix_op_sub_16_1
  6451 0000E671 31C0                <1> 	xor	eax, eax ; 0 ; Min. value	
  6452                              <1> pix_op_sub_16_1:
  6453 0000E673 66AB                <1> 	stosw
  6454 0000E675 E2F2                <1> 	loop	pix_op_sub_16_0
  6455 0000E677 89D0                <1> 	mov	eax, edx
  6456 0000E679 C3                  <1> 	retn
  6457                              <1> 
  6458                              <1> pix_op_sub_24:
  6459                              <1> 	; 24 bit true colors
  6460                              <1> 	; SUBTRACT PIXEL COLOR
  6461                              <1> 	; ecx = pixel count per row
  6462                              <1> 	; eax = color
  6463                              <1> 	; edi = start pixel address 
  6464                              <1> 
  6465                              <1> 	;and	eax, 0FFFFFFh
  6466 0000E67A 89C2                <1> 	mov	edx, eax
  6467                              <1> pix_op_sub_24_0:
  6468 0000E67C 8B07                <1> 	mov	eax, [edi]
  6469                              <1> 	; 27/02/2021
  6470 0000E67E 25FFFFFF00          <1> 	and	eax, 0FFFFFFh
  6471 0000E683 29D0                <1> 	sub	eax, edx
  6472 0000E685 7302                <1> 	jnb	short pix_op_sub_24_1
  6473 0000E687 31C0                <1> 	xor	eax, eax ; 0 ; Min. value
  6474                              <1> pix_op_sub_24_1: 
  6475 0000E689 66AB                <1> 	stosw
  6476 0000E68B C1E810              <1> 	shr	eax, 16
  6477 0000E68E AA                  <1> 	stosb
  6478 0000E68F E2EB                <1> 	loop	pix_op_sub_24_0
  6479 0000E691 89D0                <1> 	mov	eax, edx
  6480 0000E693 C3                  <1> 	retn
  6481                              <1> 
  6482                              <1> pix_op_sub_32:
  6483                              <1> 	; 32 bit true colors
  6484                              <1> 	; SUBTRACT PIXEL COLOR
  6485                              <1> 	; ecx = pixel count per row
  6486                              <1> 	; eax = color
  6487                              <1> 	; edi = start pixel address 
  6488                              <1> 
  6489 0000E694 89C2                <1> 	mov	edx, eax
  6490                              <1> pix_op_sub_32_0:
  6491 0000E696 8B07                <1> 	mov	eax, [edi]
  6492 0000E698 29D0                <1> 	sub	eax, edx
  6493 0000E69A 7302                <1> 	jnb	short pix_op_sub_32_1
  6494 0000E69C 31C0                <1> 	xor	eax, eax ; 0 ; Min. value
  6495                              <1> pix_op_sub_32_1:
  6496 0000E69E AB                  <1> 	stosd
  6497 0000E69F E2F5                <1> 	loop	pix_op_sub_32_0
  6498 0000E6A1 89D0                <1> 	mov	eax, edx
  6499 0000E6A3 C3                  <1> 	retn
  6500                              <1> 
  6501                              <1> pix_op_or_8:
  6502                              <1> 	; 8 bit colors (256 colors)
  6503                              <1> 	; OR PIXEL COLOR
  6504                              <1> 	; ecx = pixel count per row
  6505                              <1> 	;  al = color
  6506                              <1> 	; edi = start pixel address 
  6507                              <1> 
  6508                              <1> pix_op_or_8_0:
  6509 0000E6A4 0807                <1> 	or	[edi], al
  6510 0000E6A6 47                  <1> 	inc	edi
  6511 0000E6A7 E2FB                <1> 	loop	pix_op_or_8_0
  6512 0000E6A9 C3                  <1> 	retn
  6513                              <1> 
  6514                              <1> pix_op_or_16:
  6515                              <1> 	; 16 bit colors (65536 colors)
  6516                              <1> 	; OR PIXEL COLOR
  6517                              <1> 	; ecx = pixel count per row
  6518                              <1> 	;  ax = color
  6519                              <1> 	; edi = start pixel address 
  6520                              <1> 
  6521                              <1> pix_op_or_16_0:
  6522 0000E6AA 660907              <1> 	or	[edi], ax
  6523 0000E6AD 47                  <1> 	inc	edi
  6524 0000E6AE 47                  <1> 	inc	edi
  6525 0000E6AF E2F9                <1> 	loop	pix_op_or_16_0
  6526 0000E6B1 C3                  <1> 	retn
  6527                              <1> 
  6528                              <1> pix_op_or_24:
  6529                              <1> 	; 24 bit true colors
  6530                              <1> 	; OR PIXEL COLOR
  6531                              <1> 	; ecx = pixel count per row
  6532                              <1> 	; eax = color
  6533                              <1> 	; edi = start pixel address 
  6534                              <1> 
  6535 0000E6B2 89C2                <1> 	mov	edx, eax
  6536                              <1> pix_op_or_24_0:
  6537 0000E6B4 0B07                <1> 	or	eax, [edi]
  6538 0000E6B6 66AB                <1> 	stosw
  6539 0000E6B8 C1E810              <1> 	shr	eax, 16
  6540 0000E6BB AA                  <1> 	stosb	
  6541 0000E6BC 89D0                <1> 	mov	eax, edx
  6542 0000E6BE E2F4                <1> 	loop	pix_op_or_24_0
  6543 0000E6C0 C3                  <1> 	retn
  6544                              <1> 
  6545                              <1> pix_op_or_32:
  6546                              <1> 	; 32 bit true colors
  6547                              <1> 	; OR PIXEL COLOR
  6548                              <1> 	; ecx = pixel count per row
  6549                              <1> 	; eax = color
  6550                              <1> 	; edi = start pixel address 
  6551                              <1> 
  6552                              <1> 	;mov	edx, eax
  6553                              <1> pix_op_or_32_0:
  6554                              <1> 	;or	eax, [edi]
  6555                              <1> 	;stosd
  6556                              <1> 	;mov	eax, edx
  6557 0000E6C1 0907                <1> 	or	[edi], eax
  6558 0000E6C3 83C704              <1> 	add	edi, 4
  6559 0000E6C6 E2F9                <1> 	loop	pix_op_or_32_0
  6560 0000E6C8 C3                  <1> 	retn
  6561                              <1> 
  6562                              <1> pix_op_and_8:
  6563                              <1> 	; 8 bit colors (256 colors)
  6564                              <1> 	; AND PIXEL COLOR
  6565                              <1> 	; ecx = pixel count per row
  6566                              <1> 	;  al = color
  6567                              <1> 	; edi = start pixel address 
  6568                              <1> 
  6569                              <1> pix_op_and_8_0:
  6570 0000E6C9 2007                <1> 	and	[edi], al
  6571 0000E6CB 47                  <1> 	inc	edi
  6572 0000E6CC E2FB                <1> 	loop	pix_op_and_8_0
  6573 0000E6CE C3                  <1> 	retn
  6574                              <1> 
  6575                              <1> pix_op_and_16:
  6576                              <1> 	; 16 bit colors (65536 colors)
  6577                              <1> 	; AND PIXEL COLOR
  6578                              <1> 	; ecx = pixel count per row
  6579                              <1> 	;  ax = color
  6580                              <1> 	; edi = start pixel address 
  6581                              <1> 
  6582                              <1> pix_op_and_16_0:
  6583 0000E6CF 662107              <1> 	and	[edi], ax
  6584 0000E6D2 47                  <1> 	inc	edi
  6585 0000E6D3 47                  <1> 	inc	edi
  6586 0000E6D4 E2F9                <1> 	loop	pix_op_and_16_0
  6587 0000E6D6 C3                  <1> 	retn
  6588                              <1> 
  6589                              <1> pix_op_and_24:
  6590                              <1> 	; 24 bit true colors
  6591                              <1> 	; AND PIXEL COLOR
  6592                              <1> 	; ecx = pixel count per row
  6593                              <1> 	; eax = color
  6594                              <1> 	; edi = start pixel address 
  6595                              <1> 
  6596 0000E6D7 89C2                <1> 	mov	edx, eax
  6597                              <1> pix_op_and_24_0:
  6598 0000E6D9 2307                <1> 	and	eax, [edi]
  6599 0000E6DB 66AB                <1> 	stosw
  6600 0000E6DD C1E810              <1> 	shr	eax, 16
  6601 0000E6E0 AA                  <1> 	stosb	
  6602 0000E6E1 89D0                <1> 	mov	eax, edx
  6603 0000E6E3 E2F4                <1> 	loop	pix_op_and_24_0
  6604 0000E6E5 C3                  <1> 	retn
  6605                              <1> 
  6606                              <1> pix_op_and_32:
  6607                              <1> 	; 32 bit true colors
  6608                              <1> 	; AND PIXEL COLOR
  6609                              <1> 	; ecx = pixel count per row
  6610                              <1> 	; eax = color
  6611                              <1> 	; edi = start pixel address 
  6612                              <1> 
  6613                              <1> 	;mov	edx, eax
  6614                              <1> pix_op_and_32_0:
  6615                              <1> 	;and	eax, [edi]
  6616                              <1> 	;stosd
  6617                              <1> 	;mov	eax, edx
  6618 0000E6E6 2107                <1> 	and	[edi], eax
  6619 0000E6E8 83C704              <1> 	add	edi, 4
  6620 0000E6EB E2F9                <1> 	loop	pix_op_and_32_0
  6621 0000E6ED C3                  <1> 	retn
  6622                              <1> 
  6623                              <1> pix_op_xor_8:
  6624                              <1> 	; 8 bit colors (256 colors)
  6625                              <1> 	; XOR PIXEL COLOR
  6626                              <1> 	; ecx = pixel count per row
  6627                              <1> 	;  al = color
  6628                              <1> 	; edi = start pixel address 
  6629                              <1> 
  6630                              <1> pix_op_xor_8_0:
  6631 0000E6EE 3007                <1> 	xor	[edi], al
  6632 0000E6F0 47                  <1> 	inc	edi
  6633 0000E6F1 E2FB                <1> 	loop	pix_op_xor_8_0
  6634 0000E6F3 C3                  <1> 	retn
  6635                              <1> 
  6636                              <1> pix_op_xor_16:
  6637                              <1> 	; 16 bit colors (65536 colors)
  6638                              <1> 	; XOR PIXEL COLOR
  6639                              <1> 	; ecx = pixel count per row
  6640                              <1> 	;  ax = color
  6641                              <1> 	; edi = start pixel address 
  6642                              <1> 
  6643                              <1> pix_op_xor_16_0:
  6644 0000E6F4 663107              <1> 	xor	[edi], ax
  6645 0000E6F7 47                  <1> 	inc	edi
  6646 0000E6F8 47                  <1> 	inc	edi
  6647 0000E6F9 E2F9                <1> 	loop	pix_op_xor_16_0
  6648 0000E6FB C3                  <1> 	retn
  6649                              <1> 
  6650                              <1> pix_op_xor_24:
  6651                              <1> 	; 24 bit true colors
  6652                              <1> 	; XOR PIXEL COLOR
  6653                              <1> 	; ecx = pixel count per row
  6654                              <1> 	; eax = color
  6655                              <1> 	; edi = start pixel address 
  6656                              <1> 
  6657 0000E6FC 89C2                <1> 	mov	edx, eax
  6658                              <1> pix_op_xor_24_0:
  6659 0000E6FE 3307                <1> 	xor	eax, [edi]
  6660 0000E700 66AB                <1> 	stosw
  6661 0000E702 C1E810              <1> 	shr	eax, 16
  6662 0000E705 AA                  <1> 	stosb	
  6663 0000E706 89D0                <1> 	mov	eax, edx
  6664 0000E708 E2F4                <1> 	loop	pix_op_xor_24_0
  6665 0000E70A C3                  <1> 	retn
  6666                              <1> 
  6667                              <1> pix_op_xor_32:
  6668                              <1> 	; 32 bit true colors
  6669                              <1> 	; XOR PIXEL COLOR
  6670                              <1> 	; ecx = pixel count per row
  6671                              <1> 	; eax = color
  6672                              <1> 	; edi = start pixel address 
  6673                              <1> 
  6674                              <1> 	;mov	edx, eax
  6675                              <1> pix_op_xor_32_0:
  6676                              <1> 	;xor	eax, [edi]
  6677                              <1> 	;stosd
  6678                              <1> 	;mov	eax, edx
  6679 0000E70B 3107                <1> 	xor	[edi], eax
  6680 0000E70D 83C704              <1> 	add	edi, 4
  6681 0000E710 E2F9                <1> 	loop	pix_op_xor_32_0
  6682 0000E712 C3                  <1> 	retn
  6683                              <1> 
  6684                              <1> pix_op_mix_8:
  6685                              <1> 	; 8 bit colors (256 colors)
  6686                              <1> 	; MIX (AVERAGE) PIXEL COLORS
  6687                              <1> 	; ecx = pixel count per row
  6688                              <1> 	;  al = color
  6689                              <1> 	; edi = start pixel address 
  6690                              <1> 
  6691 0000E713 88C4                <1> 	mov	ah, al
  6692                              <1> pix_op_mix_8_0:
  6693 0000E715 0207                <1> 	add	al, [edi]
  6694 0000E717 D0D8                <1> 	rcr	al, 1
  6695 0000E719 AA                  <1> 	stosb
  6696 0000E71A 88E0                <1> 	mov	al, ah
  6697 0000E71C E2F7                <1> 	loop	pix_op_mix_8_0
  6698 0000E71E C3                  <1> 	retn
  6699                              <1> 
  6700                              <1> pix_op_mix_16:
  6701                              <1> 	; 16 bit colors (65536 colors)
  6702                              <1> 	; MIX (AVERAGE) PIXEL COLORS
  6703                              <1> 	; ecx = pixel count per row
  6704                              <1> 	;  ax = color
  6705                              <1> 	; edi = start pixel address 
  6706                              <1> 
  6707 0000E71F 89C2                <1> 	mov	edx, eax
  6708                              <1> pix_op_mix_16_0:
  6709 0000E721 660307              <1> 	add	ax, [edi]
  6710 0000E724 66D1D8              <1> 	rcr	ax, 1
  6711 0000E727 66AB                <1> 	stosw
  6712 0000E729 89D0                <1> 	mov	eax, edx
  6713 0000E72B E2F4                <1> 	loop	pix_op_mix_16_0
  6714 0000E72D C3                  <1> 	retn
  6715                              <1> 
  6716                              <1> pix_op_mix_24:
  6717                              <1> 	; 24 bit true colors
  6718                              <1> 	; MIX (AVERAGE) PIXEL COLORS
  6719                              <1> 	; ecx = pixel count per row
  6720                              <1> 	; eax = color
  6721                              <1> 	; edi = start pixel address 
  6722                              <1> 
  6723 0000E72E 53                  <1> 	push	ebx
  6724 0000E72F BBFFFFFF00          <1> 	mov	ebx, 0FFFFFFh
  6725                              <1> 	;and	eax, ebx ; 0FFFFFFh
  6726 0000E734 89C2                <1> 	mov	edx, eax
  6727                              <1> pix_op_mix_24_0:
  6728 0000E736 8B07                <1> 	mov	eax, [edi]
  6729 0000E738 21D8                <1> 	and	eax, ebx ; 0FFFFFFh
  6730 0000E73A 01D0                <1> 	add	eax, edx
  6731 0000E73C D1E8                <1> 	shr	eax, 1
  6732                              <1> 	;rcr	eax, 1
  6733 0000E73E 66AB                <1> 	stosw
  6734 0000E740 C1E810              <1> 	shr	eax, 16
  6735 0000E743 AA                  <1> 	stosb
  6736 0000E744 E2F0                <1> 	loop	pix_op_mix_24_0
  6737 0000E746 89D0                <1> 	mov	eax, edx
  6738 0000E748 5B                  <1> 	pop	ebx
  6739 0000E749 C3                  <1> 	retn
  6740                              <1> 
  6741                              <1> pix_op_mix_32:
  6742                              <1> 	; 32 bit true colors
  6743                              <1> 	; MIX (AVERAGE) PIXEL COLORS
  6744                              <1> 	; ecx = pixel count per row
  6745                              <1> 	; eax = color
  6746                              <1> 	; edi = start pixel address 
  6747                              <1> 
  6748 0000E74A 89C2                <1> 	mov	edx, eax
  6749                              <1> pix_op_mix_32_0:
  6750 0000E74C 0307                <1> 	add	eax, [edi]
  6751 0000E74E D1D8                <1> 	rcr	eax, 1	
  6752 0000E750 AB                  <1> 	stosd
  6753 0000E751 89D0                <1> 	mov	eax, edx
  6754 0000E753 E2F7                <1> 	loop	pix_op_mix_32_0
  6755 0000E755 C3                  <1> 	retn
  6756                              <1> 
  6757                              <1> pix_op_not_8:
  6758                              <1> 	; 8 bit colors (256 colors)
  6759                              <1> 	; NOT PIXEL COLOR
  6760                              <1> 	; ecx = pixel count per row
  6761                              <1> 	; edi = start pixel address 
  6762                              <1> 
  6763                              <1> pix_op_not_8_0:
  6764 0000E756 F617                <1> 	not	byte [edi]
  6765 0000E758 47                  <1> 	inc	edi
  6766 0000E759 E2FB                <1> 	loop	pix_op_not_8_0
  6767 0000E75B C3                  <1> 	retn
  6768                              <1> 
  6769                              <1> pix_op_not_16:
  6770                              <1> 	; 16 bit colors (65536 colors)
  6771                              <1> 	; NOT PIXEL COLOR
  6772                              <1> 	; ecx = pixel count per row
  6773                              <1> 	; edi = start pixel address 
  6774                              <1> 
  6775                              <1> pix_op_not_16_0:
  6776 0000E75C 66F717              <1> 	not	word [edi]
  6777 0000E75F 47                  <1> 	inc	edi
  6778 0000E760 47                  <1> 	inc	edi
  6779 0000E761 E2F9                <1> 	loop	pix_op_not_16_0
  6780 0000E763 C3                  <1> 	retn
  6781                              <1> 
  6782                              <1> pix_op_not_24:
  6783                              <1> 	; 24 bit true colors
  6784                              <1> 	; NOT PIXEL COLOR
  6785                              <1> 	; ecx = pixel count per row
  6786                              <1> 	; edi = start pixel address 
  6787                              <1> 
  6788                              <1> pix_op_not_24_0:
  6789 0000E764 66F717              <1> 	not	word [edi]
  6790 0000E767 47                  <1> 	inc	edi
  6791 0000E768 47                  <1> 	inc	edi
  6792 0000E769 F617                <1> 	not	byte [edi]
  6793 0000E76B 47                  <1> 	inc	edi
  6794 0000E76C E2F6                <1> 	loop	pix_op_not_24_0
  6795 0000E76E C3                  <1> 	retn
  6796                              <1> 
  6797                              <1> pix_op_not_32:
  6798                              <1> 	; 32 bit true colors
  6799                              <1> 	; NOT PIXEL COLOR
  6800                              <1> 	; ecx = pixel count per row
  6801                              <1> 	; eax = color
  6802                              <1> 	; edi = start pixel address 
  6803                              <1> pix_op_not_32_0:
  6804 0000E76F F717                <1> 	not	dword [edi]
  6805 0000E771 83C704              <1> 	add	edi, 4
  6806 0000E774 E2F9                <1> 	loop	pix_op_not_32_0
  6807 0000E776 C3                  <1> 	retn
  6808                              <1> 
  6809                              <1> pix_op_neg_8:
  6810                              <1> 	; 8 bit colors (256 colors)
  6811                              <1> 	; NEG PIXEL COLOR
  6812                              <1> 	; ecx = pixel count per row
  6813                              <1> 	; edi = start pixel address 
  6814                              <1> 
  6815                              <1> pix_op_neg_8_0:
  6816 0000E777 F61F                <1> 	neg	byte [edi]
  6817 0000E779 47                  <1> 	inc	edi
  6818 0000E77A E2FB                <1> 	loop	pix_op_neg_8_0
  6819 0000E77C C3                  <1> 	retn
  6820                              <1> 
  6821                              <1> pix_op_neg_16:
  6822                              <1> 	; 16 bit colors (65536 colors)
  6823                              <1> 	; NEG PIXEL COLOR
  6824                              <1> 	; ecx = pixel count per row
  6825                              <1> 	; edi = start pixel address 
  6826                              <1> 
  6827                              <1> pix_op_neg_16_0:
  6828 0000E77D 66F71F              <1> 	neg	word [edi]
  6829 0000E780 47                  <1> 	inc	edi
  6830 0000E781 47                  <1> 	inc	edi
  6831 0000E782 E2F9                <1> 	loop	pix_op_neg_16_0
  6832 0000E784 C3                  <1> 	retn
  6833                              <1> 
  6834                              <1> pix_op_neg_24:
  6835                              <1> 	; 24 bit true colors
  6836                              <1> 	; NEG PIXEL COLOR
  6837                              <1> 	; ecx = pixel count per row
  6838                              <1> 	; edi = start pixel address 
  6839                              <1> 
  6840                              <1> pix_op_neg_24_0:
  6841 0000E785 8B07                <1> 	mov	eax, [edi]
  6842 0000E787 25FFFFFF00          <1> 	and	eax, 0FFFFFFh
  6843 0000E78C F7D8                <1> 	neg	eax
  6844 0000E78E 66AB                <1> 	stosw
  6845 0000E790 C1E810              <1> 	shr	eax, 16
  6846 0000E793 AA                  <1> 	stosb
  6847 0000E794 E2EF                <1> 	loop	pix_op_neg_24_0
  6848 0000E796 C3                  <1> 	retn
  6849                              <1> 
  6850                              <1> pix_op_neg_32:
  6851                              <1> 	; 32 bit true colors
  6852                              <1> 	; NEG PIXEL COLOR
  6853                              <1> 	; ecx = pixel count per row
  6854                              <1> 	; eax = color
  6855                              <1> 	; edi = start pixel address 
  6856                              <1> pix_op_neg_32_0:
  6857 0000E797 F71F                <1> 	neg	dword [edi]
  6858 0000E799 83C704              <1> 	add	edi, 4
  6859 0000E79C E2F9                <1> 	loop	pix_op_neg_32_0
  6860 0000E79E C3                  <1> 	retn
  6861                              <1> 
  6862                              <1> pix_op_inc_8:
  6863                              <1> 	; 8 bit colors (256 colors)
  6864                              <1> 	; INCREASE PIXEL COLOR
  6865                              <1> 	; ecx = pixel count per row
  6866                              <1> 	; edi = start pixel address 
  6867                              <1> 
  6868                              <1> pix_op_inc_8_0:
  6869 0000E79F FE07                <1> 	inc	byte [edi]
  6870 0000E7A1 7502                <1> 	jnz	short pix_op_inc_8_1
  6871                              <1> 	;mov	[edi], 0FFh ; Max. value	
  6872 0000E7A3 FE0F                <1> 	dec	byte [edi]
  6873                              <1> pix_op_inc_8_1:
  6874 0000E7A5 47                  <1> 	inc	edi
  6875 0000E7A6 E2F7                <1> 	loop	pix_op_inc_8_0
  6876 0000E7A8 C3                  <1> 	retn
  6877                              <1> 
  6878                              <1> pix_op_inc_16:
  6879                              <1> 	; 16 bit colors (65536 colors)
  6880                              <1> 	; INCREASE PIXEL COLOR
  6881                              <1> 	; ecx = pixel count per row
  6882                              <1> 	; edi = start pixel address 
  6883                              <1> 
  6884                              <1> pix_op_inc_16_0:
  6885 0000E7A9 66FF07              <1> 	inc	word [edi]
  6886 0000E7AC 7503                <1> 	jnz	short pix_op_inc_16_1
  6887                              <1> 	;mov	word [edi], 0FFFFh ; Max. value
  6888 0000E7AE 66FF0F              <1> 	dec	word [edi]
  6889                              <1> pix_op_inc_16_1:
  6890 0000E7B1 47                  <1> 	inc	edi
  6891 0000E7B2 47                  <1> 	inc	edi
  6892 0000E7B3 E2F4                <1> 	loop	pix_op_inc_16_0
  6893 0000E7B5 C3                  <1> 	retn
  6894                              <1> 
  6895                              <1> pix_op_inc_24:
  6896                              <1> 	; 24 bit true colors
  6897                              <1> 	; INCREASE PIXEL COLOR
  6898                              <1> 	; ecx = pixel count per row
  6899                              <1> 	; edi = start pixel address 
  6900                              <1> 
  6901                              <1> pix_op_inc_24_0:
  6902 0000E7B6 8B07                <1> 	mov	eax, [edi]
  6903 0000E7B8 40                  <1> 	inc	eax
  6904 0000E7B9 25FFFFFF00          <1> 	and	eax, 0FFFFFFh
  6905 0000E7BE 7501                <1> 	jnz	short pix_op_inc_24_1
  6906                              <1> 	;mov	eax, 0FFFFFFh  ; Max. value
  6907 0000E7C0 48                  <1> 	dec	eax ; 0FFFFFFFFh
  6908                              <1> pix_op_inc_24_1: 
  6909 0000E7C1 66AB                <1> 	stosw
  6910 0000E7C3 C1E810              <1> 	shr	eax, 16
  6911 0000E7C6 AA                  <1> 	stosb
  6912 0000E7C7 E2ED                <1> 	loop	pix_op_inc_24_0
  6913 0000E7C9 C3                  <1> 	retn
  6914                              <1> 
  6915                              <1> pix_op_inc_32:
  6916                              <1> 	; 32 bit true colors
  6917                              <1> 	; INCREASE PIXEL COLOR
  6918                              <1> 	; ecx = pixel count per row
  6919                              <1> 	; edi = start pixel address 
  6920                              <1> 
  6921                              <1> pix_op_inc_32_0:
  6922 0000E7CA FF07                <1> 	inc	dword [edi]
  6923 0000E7CC 7502                <1> 	jnz	short pix_op_inc_32_1
  6924                              <1> 	;mov	dword [edi], 0FFFFFFFFh ; Max. value
  6925 0000E7CE FF0F                <1> 	dec	dword [edi]
  6926                              <1> pix_op_inc_32_1:
  6927 0000E7D0 83C704              <1> 	add	edi, 4
  6928 0000E7D3 E2F5                <1> 	loop	pix_op_inc_32_0
  6929 0000E7D5 C3                  <1> 	retn
  6930                              <1> 
  6931                              <1> pix_op_dec_8:
  6932                              <1> 	; 8 bit colors (256 colors)
  6933                              <1> 	; DECREASE PIXEL COLOR
  6934                              <1> 	; ecx = pixel count per row
  6935                              <1> 	; edi = start pixel address 
  6936                              <1> 
  6937                              <1> pix_op_dec_8_0:
  6938 0000E7D6 FE0F                <1> 	dec	byte [edi]
  6939 0000E7D8 7902                <1> 	jns	short pix_op_dec_8_1
  6940 0000E7DA FE07                <1> 	inc	byte [edi] ; 0 ; Min. value	
  6941                              <1> pix_op_dec_8_1:
  6942 0000E7DC 47                  <1> 	inc	edi
  6943 0000E7DD E2F7                <1> 	loop	pix_op_dec_8_0
  6944 0000E7DF C3                  <1> 	retn
  6945                              <1> 
  6946                              <1> pix_op_dec_16:
  6947                              <1> 	; 16 bit colors (65536 colors)
  6948                              <1> 	; DECREASE PIXEL COLOR
  6949                              <1> 	; ecx = pixel count per row
  6950                              <1> 	; edi = start pixel address 
  6951                              <1> 
  6952                              <1> pix_op_dec_16_0:
  6953 0000E7E0 66FF0F              <1> 	dec	word [edi]
  6954 0000E7E3 7903                <1> 	jns	short pix_op_dec_16_1
  6955 0000E7E5 66FF07              <1> 	inc	word [edi] ; 0 ; Min. value	
  6956                              <1> pix_op_dec_16_1:
  6957 0000E7E8 47                  <1> 	inc edi
  6958 0000E7E9 47                  <1> 	inc edi
  6959 0000E7EA E2F4                <1> 	loop	pix_op_dec_16_0
  6960 0000E7EC C3                  <1> 	retn
  6961                              <1> 
  6962                              <1> pix_op_dec_24:
  6963                              <1> 	; 24 bit true colors
  6964                              <1> 	; DECREASE PIXEL COLOR
  6965                              <1> 	; ecx = pixel count per row
  6966                              <1> 	; edi = start pixel address 
  6967                              <1> 
  6968                              <1> pix_op_dec_24_0:
  6969 0000E7ED 8B07                <1> 	mov	eax, [edi]
  6970 0000E7EF 25FFFFFF00          <1> 	and	eax, 0FFFFFFh
  6971 0000E7F4 7401                <1> 	jz	short pix_op_dec_24_1
  6972                              <1> 			; 0 ; Min. value
  6973 0000E7F6 48                  <1> 	dec	eax
  6974                              <1> pix_op_dec_24_1:
  6975 0000E7F7 66AB                <1> 	stosw
  6976 0000E7F9 C1E810              <1> 	shr	eax, 16
  6977 0000E7FC AA                  <1> 	stosb
  6978 0000E7FD E2B7                <1> 	loop	pix_op_inc_24_0
  6979 0000E7FF C3                  <1> 	retn
  6980                              <1> 
  6981                              <1> pix_op_dec_32:
  6982                              <1> 	; 32 bit true colors
  6983                              <1> 	; DECREASE PIXEL COLOR
  6984                              <1> 	; ecx = pixel count per row
  6985                              <1> 	; edi = start pixel address 
  6986                              <1> 
  6987                              <1> pix_op_dec_32_0:
  6988 0000E800 FF0F                <1> 	dec	dword [edi]
  6989 0000E802 7902                <1> 	jns	short pix_op_dec_32_1
  6990 0000E804 FF07                <1> 	inc	dword [edi] ; 0 ; Min. value
  6991                              <1> pix_op_dec_32_1:
  6992 0000E806 83C704              <1> 	add	edi, 4
  6993 0000E809 E2F5                <1> 	loop	pix_op_dec_32_0
  6994 0000E80B 89D0                <1> 	mov	eax, edx
  6995 0000E80D C3                  <1> 	retn
  6996                              <1> 
  6997                              <1> pix_op_rpl_8:
  6998                              <1> 	; 8 bit colors (256 colors)
  6999                              <1> 	; REPLACE PIXEL COLORS
  7000                              <1> 	; ecx = pixel count per row
  7001                              <1> 	;  al = new color
  7002                              <1> 	; byte [maskcolor] = old color
  7003                              <1> 	; edi = start pixel address
  7004                              <1> 
  7005 0000E80E 8A25[4E100300]      <1> 	mov	ah, [maskcolor]
  7006                              <1> pix_op_rpl_8_0:
  7007 0000E814 3A27                <1> 	cmp	ah, [edi]
  7008 0000E816 7502                <1> 	jne	short pix_op_rpl_8_1
  7009 0000E818 8807                <1> 	mov	[edi], al
  7010                              <1> pix_op_rpl_8_1:
  7011 0000E81A 47                  <1> 	inc	edi
  7012 0000E81B E2F7                <1> 	loop	pix_op_rpl_8_0
  7013 0000E81D C3                  <1> 	retn
  7014                              <1> 
  7015                              <1> pix_op_rpl_16:
  7016                              <1> 	; 16 bit colors (65536 colors)
  7017                              <1> 	; REPLACE PIXEL COLORS
  7018                              <1> 	; ecx = pixel count per row
  7019                              <1> 	;  ax = new color
  7020                              <1> 	; word [maskcolor] = old color
  7021                              <1> 	; edi = start pixel address
  7022                              <1> 
  7023 0000E81E 8B15[4E100300]      <1> 	mov	edx, [maskcolor]
  7024                              <1> pix_op_rpl_16_0:
  7025 0000E824 663B17              <1> 	cmp	dx, [edi]
  7026 0000E827 7503                <1> 	jne	short pix_op_rpl_16_1
  7027 0000E829 668907              <1> 	mov	[edi], ax
  7028                              <1> pix_op_rpl_16_1:
  7029 0000E82C 47                  <1> 	inc	edi
  7030 0000E82D 47                  <1> 	inc	edi
  7031 0000E82E E2F4                <1> 	loop	pix_op_rpl_16_0
  7032 0000E830 C3                  <1> 	retn
  7033                              <1> 
  7034                              <1> pix_op_rpl_24:
  7035                              <1> 	; 24 bit true colors
  7036                              <1> 	; REPLACE PIXEL COLORS
  7037                              <1> 	; ecx = pixel count per row
  7038                              <1> 	; eax = new color
  7039                              <1> 	; [maskcolor] = old color
  7040                              <1> 	; edi = start pixel address
  7041                              <1> 
  7042                              <1> pix_op_rpl_24_0:
  7043 0000E831 8B17                <1> 	mov	edx, [edi]
  7044 0000E833 81E2FFFFFF00        <1> 	and	edx, 0FFFFFFh
  7045 0000E839 3B15[4E100300]      <1> 	cmp	edx, [maskcolor]
  7046 0000E83F 7406                <1> 	je	short pix_op_rpl_24_1
  7047 0000E841 83C703              <1> 	add	edi, 3
  7048 0000E844 E2EB                <1> 	loop	pix_op_rpl_24_0
  7049 0000E846 C3                  <1> 	retn
  7050                              <1> pix_op_rpl_24_1: 
  7051 0000E847 AA                  <1> 	stosb
  7052 0000E848 C1C808              <1> 	ror	eax, 8
  7053 0000E84B 66AB                <1> 	stosw
  7054 0000E84D C1C008              <1> 	rol	eax, 8
  7055 0000E850 E2DF                <1> 	loop	pix_op_rpl_24_0
  7056 0000E852 C3                  <1> 	retn
  7057                              <1> 
  7058                              <1> pix_op_rpl_32:
  7059                              <1> 	; 32 bit true colors
  7060                              <1> 	; REPLACE PIXEL COLORS
  7061                              <1> 	; ecx = pixel count per row
  7062                              <1> 	; eax = new color
  7063                              <1> 	; [maskcolor] = old color
  7064                              <1> 	; edi = start pixel address
  7065                              <1> 
  7066 0000E853 8B15[4E100300]      <1> 	mov	edx, [maskcolor]
  7067                              <1> pix_op_rpl_32_0:
  7068 0000E859 3B17                <1> 	cmp	edx, [edi]
  7069 0000E85B 7504                <1> 	jne	short pix_op_rpl_32_2
  7070 0000E85D AB                  <1> 	stosd
  7071 0000E85E E2F9                <1> 	loop	pix_op_rpl_32_0
  7072 0000E860 C3                  <1> 	retn	
  7073                              <1> pix_op_rpl_32_2:
  7074 0000E861 83C704              <1> 	add	edi, 4
  7075 0000E864 E2F3                <1> 	loop	pix_op_rpl_32_0
  7076 0000E866 C3                  <1> 	retn
  7077                              <1> 
  7078                              <1> pix_op_chr:
  7079                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
  7080                              <1> 	; 15/02/2021
  7081                              <1> 	; 05/02/2021
  7082                              <1> 	; WRITE CHARACTER (FONT)
  7083                              <1> 	; 05/01/2021 ([ufont])
  7084                              <1> 	; 01/01/2021
  7085                              <1> 	;     CL = char's color (8 bit, 256 colors)
  7086                              <1> 	;    ECX = char's color (16 bit and true colors)
  7087                              <1> 	;     DL = Character's ASCII code
  7088                              <1> 	;     DH bit 0 -> font height
  7089                              <1> 	;	  0 -> 8x16 character font
  7090                              <1> 	;	  1 -> 8x8 character font
  7091                              <1> 	;     DH bit 1 & 2 -> scale	
  7092                              <1> 	;	  0 = 1/1 (8 pixels per char row)
  7093                              <1> 	;	  1 = 2/1 (16 pixels per char row)
  7094                              <1> 	;	  2 = 3/1 (24 pixels per char row)
  7095                              <1> 	;	  3 = 4/1 (32 pixels per char row) 
  7096                              <1> 	;     DH bit 6 -> [ufont] option (1 = use [ufont])
  7097                              <1> 	;     If DH bit 7 = 1
  7098                              <1> 	;	 USER FONT (from user buffer)
  7099                              <1> 	;	    DL = 0 -> 8x8 (width: 1 byte per row)
  7100                              <1> 	;	    DL = 1 -> 8x16
  7101                              <1> 	;	    DL = 2 -> 16x16 (width: 2 bytes)
  7102                              <1> 	;	    DL = 3 -> 16x32
  7103                              <1> 	;	    DL = 4 -> 24x24 (width: 3 bytes)
  7104                              <1> 	;	    DL = 5 -> 24x48
  7105                              <1> 	;	    DL = 6 -> 32x32 (width: 4 bytes)
  7106                              <1> 	;	    DL = 7 -> 32x64
  7107                              <1> 	;	    DL > 7 -> invalid (unused)
  7108                              <1> 	;	 EDI = user's font buffer address
  7109                              <1> 	;	    (NOTE: byte order is as row0,row1,row2..)
  7110                              <1> 	;     ESI = start position (row, column) (*)
  7111                              <1> 	;	     (HW = row, SI = column)
  7112                              <1> 
  7113 0000E867 89F0                <1> 	mov	eax, esi ; start position
  7114 0000E869 E856F2FFFF          <1> 	call	calc_pixel_offset
  7115 0000E86E 3B05[42100300]      <1> 	cmp	eax, [v_siz]
  7116 0000E874 736D                <1> 	jnb	short pix_op_chr_err ; out of display page!
  7117 0000E876 E826F2FFFF          <1> 	call	pixels_to_byte_count
  7118                              <1> 	; eax = font start offset
  7119 0000E87B 0305[3E100300]      <1> 	add	eax, [v_mem] ; LFB start address
  7120 0000E881 A3[46100300]        <1> 	mov	[v_str], eax ; font start address 
  7121                              <1> 
  7122 0000E886 890D[4E100300]      <1> 	mov	[maskcolor], ecx ; save char's color
  7123                              <1> 
  7124 0000E88C 8835[3C100300]      <1> 	mov	[v_ops], dh
  7125                              <1> 
  7126 0000E892 81E6FFFF0000        <1> 	and	esi, 0FFFFh
  7127 0000E898 8935[56100300]      <1> 	mov	[buffer8], esi ; start column
  7128                              <1> 
  7129 0000E89E 31DB                <1> 	xor	ebx, ebx ; 0
  7130 0000E8A0 31C0                <1> 	xor	eax, eax ; 15/02/2021
  7131                              <1> 
  7132 0000E8A2 F6C680              <1> 	test	dh, 80h
  7133 0000E8A5 7577                <1> 	jnz	short pix_op_chr_u ; user font
  7134                              <1> 
  7135 0000E8A7 80E63F              <1> 	and	dh, 3Fh ; clear bit 6, [UFONT] option bit
  7136 0000E8AA 7409                <1> 	jz	short pix_op_chr_0
  7137                              <1> 
  7138 0000E8AC 80FE07              <1> 	cmp	dh, 7
  7139 0000E8AF 7732                <1> 	ja	short pix_op_chr_err
  7140                              <1> 			 ; invalid (undefined) option 
  7141 0000E8B1 88F4                <1> 	mov	ah, dh
  7142 0000E8B3 D0EC                <1> 	shr	ah, 1
  7143                              <1> 	; ah = 0 to 3, scale
  7144                              <1> 	;jmp	short pix_op_chr_font_pixels
  7145                              <1> 
  7146                              <1> pix_op_chr_font_pixels:
  7147                              <1> 	; 05/02/2021
  7148                              <1> 	; write scaled font to buffer
  7149                              <1> 
  7150                              <1> 	; DL = ASCII code of character
  7151                              <1> 	; AH = scale
  7152                              <1> 	; EDI = buffer address (kernel)
  7153                              <1> 
  7154                              <1> pix_op_chr_0:
  7155 0000E8B5 88D3                <1> 	mov	bl, dl ; 15/02/2021
  7156 0000E8B7 31C9                <1> 	xor	ecx, ecx
  7157 0000E8B9 B610                <1> 	mov	dh, 16
  7158 0000E8BB F605[3C100300]01    <1> 	test	byte [v_ops], 1 ; 8x8 font ?
  7159 0000E8C2 7428                <1> 	jz	short pix_op_chr_2 ; 8x16 font 
  7160 0000E8C4 B608                <1> 	mov	dh, 8
  7161 0000E8C6 C1E303              <1> 	shl	ebx, 3 ; * 8
  7162 0000E8C9 F605[3C100300]40    <1> 	test	byte [v_ops], 40h ; [ufont] option
  7163 0000E8D0 7412                <1> 	jz	short pix_op_chr_1  ; no
  7164                              <1> 	; test 8x8 user font is ready flag
  7165 0000E8D2 F605[32100300]01    <1> 	test	byte [ufont], 1
  7166 0000E8D9 7409                <1> 	jz	short pix_op_chr_1 ; no
  7167 0000E8DB 81C300500900        <1> 	add	ebx, VGAFONT8USER
  7168 0000E8E1 EB2C                <1> 	jmp	short pix_op_chr_fpos_0
  7169                              <1> pix_op_chr_err:
  7170 0000E8E3 C3                  <1> 	retn
  7171                              <1> pix_op_chr_1:
  7172 0000E8E4 81C3[D84D0100]      <1> 	add	ebx, vgafont8 ; system font (8x8)
  7173 0000E8EA EB23                <1> 	jmp	short pix_op_chr_fpos_0
  7174                              <1> pix_op_chr_2:
  7175 0000E8EC C1E304              <1> 	shl	ebx, 4 ; * 16
  7176 0000E8EF F605[3C100300]40    <1> 	test	byte [v_ops], 40h ; [ufont] option
  7177 0000E8F6 7411                <1> 	jz	short pix_op_chr_3  ; no
  7178                              <1> 	; test 8x16 user font is ready flag
  7179 0000E8F8 F605[32100300]02    <1> 	test	byte [ufont], 2
  7180 0000E8FF 7408                <1> 	jz	short pix_op_chr_3 ; no
  7181 0000E901 81C300400900        <1> 	add	ebx, VGAFONT16USER
  7182 0000E907 EB06                <1> 	jmp	short pix_op_chr_fpos_0
  7183                              <1> pix_op_chr_3:
  7184 0000E909 81C3[D8630100]      <1> 	add	ebx, vgafont16 ; system font (8x16)
  7185                              <1> pix_op_chr_fpos_0:
  7186 0000E90F 20E4                <1> 	and	ah, ah
  7187 0000E911 754A                <1> 	jnz	short pix_op_chr_fpos_1 ; scale > 1 
  7188                              <1> 	; no scale (scale = 1)
  7189 0000E913 89DE                <1> 	mov	esi, ebx ; 15/02/2021
  7190 0000E915 88F1                <1> 	mov	cl, dh ; rows/height (16 or 8)	
  7191 0000E917 B608                <1> 	mov	dh, 8  ; columns/width
  7192 0000E919 E9CB000000          <1> 	jmp	pix_op_chr_f2p
  7193                              <1> pix_op_chr_u:
  7194                              <1> 	; write user defined font 
  7195 0000E91E 80FE80              <1> 	cmp	dh, 80h
  7196 0000E921 75C0                <1> 	jne	short pix_op_chr_err
  7197 0000E923 80FA07              <1> 	cmp	dl, 7
  7198 0000E926 77BB                <1> 	ja	short pix_op_chr_err
  7199                              <1> 
  7200                              <1> 	; 16/02/2021
  7201 0000E928 89FE                <1> 	mov	esi, edi ; user's font buffer
  7202                              <1> 	
  7203                              <1> 	;xor	eax, eax
  7204                              <1> 	; eax = 0 ; 15/02/2021	
  7205 0000E92A 88D4                <1> 	mov	ah, dl
  7206 0000E92C D0EC                <1> 	shr	ah, 1
  7207 0000E92E FEC4                <1> 	inc	ah	
  7208                              <1> 	; ah =  1 to 4
  7209 0000E930 88E0                <1> 	mov	al, ah
  7210 0000E932 C0E003              <1> 	shl	al, 3 ; * 8
  7211                              <1> 	; al = 8,16,24,32
  7212 0000E935 88C3                <1> 	mov	bl, al
  7213 0000E937 88C7                <1> 	mov	bh, al
  7214 0000E939 F6E4                <1> 	mul	ah
  7215                              <1> 	; ax = 8,32,72,128 bytes 
  7216 0000E93B F6C201              <1> 	test	dl, 1
  7217 0000E93E 7404                <1> 	jz	short pix_op_chr_u_0
  7218                              <1> 	;shl	ax, 1 ; *2
  7219                              <1> 	; 23/07/2022
  7220 0000E940 D1E0                <1> 	shl	eax, 1
  7221                              <1> 	; ax = 16,32,144,256 bytes
  7222 0000E942 D0E7                <1> 	shl	bh, 1
  7223                              <1> pix_op_chr_u_0:
  7224                              <1> 	; eax = byte count
  7225 0000E944 89C1                <1> 	mov	ecx, eax
  7226 0000E946 BF00760900          <1> 	mov	edi, VBE3SAVERESTOREBLOCK
  7227                              <1> 	; esi = user buffer
  7228 0000E94B E8A3240000          <1> 	call	transfer_from_user_buffer
  7229 0000E950 7291                <1> 	jc	short pix_op_chr_err
  7230                              <1> 
  7231 0000E952 88F9                <1> 	mov	cl, bh ; rows/height
  7232 0000E954 88DE                <1> 	mov	dh, bl ; columns (width)
  7233 0000E956 89FE                <1> 	mov	esi, edi ; VBE3SAVERESTOREBLOCK
  7234 0000E958 E98C000000          <1> 	jmp	pix_op_chr_f2p
  7235                              <1> 
  7236                              <1> pix_op_chr_fpos_1:
  7237                              <1> 	; 18/02/2021
  7238                              <1> 	; scale > 1
  7239 0000E95D 88F5                <1> 	mov	ch, dh ; 16 or 8
  7240 0000E95F BF00760900          <1> 	mov	edi, VBE3SAVERESTOREBLOCK
  7241 0000E964 89FE                <1> 	mov	esi, edi
  7242 0000E966 FECC                <1> 	dec	ah
  7243 0000E968 7522                <1> 	jnz	short pix_op_chr_fpos_5 ; scale > 2
  7244                              <1> 	; scale = 2
  7245                              <1> pix_op_chr_fpos_2:	
  7246 0000E96A B108                <1> 	mov	cl, 8
  7247 0000E96C 8A13                <1> 	mov	dl, [ebx]
  7248                              <1> pix_op_chr_fpos_3:
  7249                              <1> 	;shl 	ax, 2
  7250                              <1> 	; 23/07/2022
  7251 0000E96E C1E002              <1> 	shl	eax, 2
  7252 0000E971 D0E2                <1> 	shl	dl, 1
  7253 0000E973 7302                <1> 	jnc	short pix_op_chr_fpos_4
  7254 0000E975 0C03                <1> 	or	al, 3
  7255                              <1> pix_op_chr_fpos_4:
  7256 0000E977 FEC9                <1> 	dec	cl
  7257 0000E979 75F3                <1> 	jnz	short pix_op_chr_fpos_3
  7258 0000E97B 66AB                <1> 	stosw
  7259                              <1> 	; 18/02/2021
  7260 0000E97D 66AB                <1> 	stosw
  7261 0000E97F 43                  <1> 	inc	ebx
  7262 0000E980 FECD                <1> 	dec	ch
  7263 0000E982 75E6                <1> 	jnz	short pix_op_chr_fpos_2
  7264                              <1> 	; scale = 2
  7265 0000E984 88F1                <1> 	mov	cl, dh ; 16 or 8 (height/rows)
  7266 0000E986 D0E1                <1> 	shl	cl, 1  ; 32 or 16 rows
  7267 0000E988 B610                <1> 	mov	dh, 16 ; columns (width)
  7268 0000E98A EB5D                <1> 	jmp	short pix_op_chr_f2p
  7269                              <1> pix_op_chr_fpos_5:
  7270 0000E98C FECC                <1> 	dec	ah
  7271 0000E98E 7538                <1> 	jnz	short pix_op_chr_fpos_9 ; scale = 4
  7272                              <1> 	; scale = 3
  7273                              <1> pix_op_chr_fpos_6:	
  7274 0000E990 B108                <1> 	mov	cl, 8
  7275 0000E992 8A13                <1> 	mov	dl, [ebx]
  7276                              <1> pix_op_chr_fpos_7:
  7277 0000E994 C1E003              <1> 	shl 	eax, 3
  7278 0000E997 D0E2                <1> 	shl	dl, 1 ; 18/02/2021
  7279 0000E999 7302                <1> 	jnc	short pix_op_chr_fpos_8
  7280 0000E99B 0C07                <1> 	or	al, 7
  7281                              <1> pix_op_chr_fpos_8:
  7282 0000E99D FEC9                <1> 	dec	cl
  7283 0000E99F 75F3                <1> 	jnz	short pix_op_chr_fpos_7
  7284 0000E9A1 66AB                <1> 	stosw
  7285                              <1> 	; 18/02/2021
  7286 0000E9A3 C1C810              <1> 	ror	eax, 16
  7287 0000E9A6 AA                  <1> 	stosb
  7288 0000E9A7 C1C010              <1> 	rol	eax, 16
  7289 0000E9AA 66AB                <1> 	stosw
  7290 0000E9AC C1C810              <1> 	ror	eax, 16
  7291 0000E9AF AA                  <1> 	stosb	
  7292 0000E9B0 C1C010              <1> 	rol	eax, 16
  7293 0000E9B3 66AB                <1> 	stosw
  7294 0000E9B5 C1E810              <1> 	shr	eax, 16 ; 27/02/2021
  7295 0000E9B8 AA                  <1> 	stosb
  7296 0000E9B9 43                  <1> 	inc	ebx
  7297                              <1> 	; 18/02/2021
  7298 0000E9BA FECD                <1> 	dec	ch
  7299 0000E9BC 75D2                <1> 	jnz	short pix_op_chr_fpos_6
  7300                              <1> 	; scale = 3
  7301 0000E9BE 88F1                <1> 	mov	cl, dh ; 16 or 8 (height/rows)
  7302 0000E9C0 D0E1                <1> 	shl	cl, 1 
  7303 0000E9C2 00F1                <1> 	add	cl, dh ; 48 or 24 rows
  7304 0000E9C4 B618                <1> 	mov	dh, 24 ; columns (width)
  7305 0000E9C6 EB21                <1> 	jmp	short pix_op_chr_f2p
  7306                              <1> 
  7307                              <1> pix_op_chr_fpos_9:
  7308                              <1> 	; scale = 4
  7309 0000E9C8 B108                <1> 	mov	cl, 8
  7310 0000E9CA 8A13                <1> 	mov	dl, [ebx]
  7311                              <1> pix_op_chr_fpos_10:
  7312                              <1> 	; 18/02/2021
  7313 0000E9CC C1E004              <1> 	shl 	eax, 4
  7314 0000E9CF D0E2                <1> 	shl	dl, 1 ; 18/02/2021
  7315 0000E9D1 7302                <1> 	jnc	short pix_op_chr_fpos_11
  7316 0000E9D3 0C0F                <1> 	or	al, 0Fh ; or al, 15
  7317                              <1> pix_op_chr_fpos_11:
  7318 0000E9D5 FEC9                <1> 	dec	cl
  7319 0000E9D7 75F3                <1> 	jnz	short pix_op_chr_fpos_10
  7320 0000E9D9 AB                  <1> 	stosd
  7321                              <1> 	; 18/02/2021
  7322 0000E9DA AB                  <1> 	stosd
  7323 0000E9DB AB                  <1> 	stosd
  7324 0000E9DC AB                  <1> 	stosd
  7325 0000E9DD 43                  <1> 	inc	ebx
  7326 0000E9DE FECD                <1> 	dec	ch
  7327 0000E9E0 75E6                <1> 	jnz	short pix_op_chr_fpos_9
  7328                              <1> 	; scale = 4
  7329 0000E9E2 88F1                <1> 	mov	cl, dh ; 16 or 8 (height/rows)
  7330 0000E9E4 C0E102              <1> 	shl	cl, 2 ; 64 or 32 rows
  7331 0000E9E7 B620                <1> 	mov	dh, 32 ; columns (width)
  7332                              <1> 	;jmp	short pix_op_chr_f2p
  7333                              <1>  	
  7334                              <1> pix_op_chr_f2p:
  7335                              <1> 	; write font pixels
  7336 0000E9E9 8B3D[46100300]      <1> 	mov	edi, [v_str]
  7337                              <1> 	; 15/02/2021
  7338                              <1> pix_op_chr_f2p_next:
  7339 0000E9EF 80FE08              <1> 	cmp	dh, 8
  7340 0000E9F2 7706                <1> 	ja	short pix_op_chr_f2p_24
  7341                              <1> pix_op_chr_f2p_8:
  7342 0000E9F4 AC                  <1> 	lodsb
  7343 0000E9F5 C1E018              <1> 	shl	eax, 24 ; 15/02/2021
  7344 0000E9F8 EB16                <1> 	jmp	short pix_op_chr_f2p_0
  7345                              <1> pix_op_chr_f2p_24:
  7346 0000E9FA 80FE18              <1> 	cmp	dh, 24
  7347 0000E9FD 7710                <1> 	ja	short pix_op_chr_f2p_32
  7348 0000E9FF 7207                <1> 	jb	short pix_op_chr_f2p_16	
  7349                              <1> 	; 27/02/2021
  7350                              <1> 	;mov	eax, [esi]
  7351 0000EA01 AD                  <1> 	lodsd
  7352 0000EA02 C1E008              <1> 	shl	eax, 8
  7353                              <1> 	;add	esi, 3
  7354 0000EA05 4E                  <1> 	dec	esi
  7355 0000EA06 EB08                <1> 	jmp	short pix_op_chr_f2p_0
  7356                              <1> pix_op_chr_f2p_16:
  7357 0000EA08 66AD                <1> 	lodsw
  7358 0000EA0A C1E010              <1> 	shl	eax, 16 ; 15/02/2021
  7359 0000EA0D EB01                <1> 	jmp	short pix_op_chr_f2p_0
  7360                              <1> pix_op_chr_f2p_32:
  7361 0000EA0F AD                  <1> 	lodsd
  7362                              <1> pix_op_chr_f2p_0:
  7363                              <1> 	; EAX = font row (8,16,24,32 pixels)
  7364                              <1> 	;	(bits are shifted to left)
  7365                              <1> 	; CL = rows
  7366                              <1> 	; DH = bits per row (8,16,24,32)
  7367 0000EA10 8B1D[56100300]      <1> 	mov	ebx, [buffer8] ; start column
  7368 0000EA16 57                  <1> 	push	edi ; *
  7369 0000EA17 52                  <1> 	push	edx ; **
  7370                              <1> pix_op_chr_f2p_1:
  7371 0000EA18 E82E000000          <1> 	call	pix_op_chr_w_pixel
  7372                              <1> pix_op_chr_f2p_2:
  7373 0000EA1D 663B1D[3A100300]    <1> 	cmp	bx, [v_width] ; current column
  7374 0000EA24 7304                <1> 	jnb	short pix_op_chr_f2p_3
  7375 0000EA26 FECE                <1> 	dec	dh
  7376 0000EA28 75EE                <1> 	jnz	short pix_op_chr_f2p_1 ; next bit
  7377                              <1> pix_op_chr_f2p_3:
  7378                              <1> 	;mov	ebx, [buffer8]
  7379 0000EA2A 5A                  <1> 	pop	edx ; **
  7380 0000EA2B 58                  <1> 	pop	eax ; *
  7381 0000EA2C 3B3D[4A100300]      <1> 	cmp	edi, [v_end]
  7382 0000EA32 7316                <1> 	jnb	short pix_op_chr_f2p_4
  7383 0000EA34 FEC9                <1> 	dec	cl
  7384 0000EA36 7412                <1> 	jz	short pix_op_chr_f2p_4
  7385                              <1> 	; 27/02/2021
  7386 0000EA38 89C7                <1> 	mov	edi, eax
  7387 0000EA3A 0FB705[3A100300]    <1> 	movzx	eax, word [v_width]
  7388 0000EA41 E85BF0FFFF          <1> 	call	pixels_to_byte_count
  7389 0000EA46 01C7                <1> 	add	edi, eax ; next position
  7390 0000EA48 EBA5                <1> 	jmp	short pix_op_chr_f2p_next
  7391                              <1> pix_op_chr_f2p_4:
  7392 0000EA4A C3                  <1> 	retn
  7393                              <1> 
  7394                              <1> pix_op_chr_w_pixel:
  7395                              <1> 	; 15/02/2021
  7396 0000EA4B 89C5                <1> 	mov	ebp, eax
  7397 0000EA4D A1[4E100300]        <1> 	mov	eax, [maskcolor]
  7398 0000EA52 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  7399 0000EA59 7711                <1> 	ja	short pix_op_chr_wp_2
  7400                              <1> 	; 256 colors (1 byte per pixel)
  7401 0000EA5B D1E5                <1> 	shl	ebp, 1
  7402 0000EA5D 7302                <1> 	jnc	short pix_op_chr_wp_0
  7403 0000EA5F 8807                <1> 	mov	[edi], al
  7404                              <1> pix_op_chr_wp_0:
  7405 0000EA61 47                  <1> 	inc	edi
  7406 0000EA62 FF05[1C010300]      <1> 	inc	dword [u.r0] ; +1
  7407                              <1> pix_op_chr_wp_1:
  7408 0000EA68 43                  <1> 	inc	ebx
  7409 0000EA69 89E8                <1> 	mov	eax, ebp
  7410 0000EA6B C3                  <1> 	retn
  7411                              <1> pix_op_chr_wp_2:
  7412 0000EA6C 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  7413 0000EA73 772E                <1> 	ja	short pix_op_chr_wp_6 ; 32bpp
  7414 0000EA75 721C                <1> 	jb	short pix_op_chr_wp_4 ; 16bpp
  7415                              <1> 	; 24 bit true colors
  7416                              <1> 	; * 3
  7417 0000EA77 D1E5                <1> 	shl	ebp, 1
  7418 0000EA79 7309                <1> 	jnc	short pix_op_chr_wp_3
  7419 0000EA7B 668907              <1> 	mov	[edi], ax
  7420 0000EA7E C1E810              <1> 	shr	eax, 16
  7421 0000EA81 884702              <1> 	mov	[edi+2], al
  7422                              <1> pix_op_chr_wp_3:
  7423 0000EA84 B803000000          <1> 	mov	eax, 3 ; 27/02/2021 
  7424 0000EA89 01C7                <1> 	add	edi, eax  ; add edi, 3
  7425 0000EA8B 0105[1C010300]      <1> 	add	[u.r0], eax ; +3
  7426                              <1> 	
  7427 0000EA91 EBD5                <1> 	jmp	short pix_op_chr_wp_1
  7428                              <1> 
  7429                              <1> pix_op_chr_wp_4:
  7430                              <1> 	; 16 bit (65536) colors
  7431 0000EA93 D1E5                <1> 	shl	ebp, 1
  7432 0000EA95 7303                <1> 	jnc	short pix_op_chr_wp_5
  7433 0000EA97 668907              <1> 	mov	[edi], ax
  7434                              <1> pix_op_chr_wp_5:
  7435 0000EA9A 47                  <1> 	inc	edi
  7436 0000EA9B FF05[1C010300]      <1> 	inc	dword [u.r0] ; +1 
  7437 0000EAA1 EBBE                <1> 	jmp	short pix_op_chr_wp_0
  7438                              <1> 
  7439                              <1> pix_op_chr_wp_6:
  7440                              <1> 	; 32 bit true colors
  7441 0000EAA3 D1E5                <1> 	shl	ebp, 1
  7442 0000EAA5 7302                <1> 	jnc	short pix_op_chr_wp_7
  7443 0000EAA7 8907                <1> 	mov	[edi], eax
  7444                              <1> pix_op_chr_wp_7:
  7445 0000EAA9 31C0                <1> 	xor	eax, eax
  7446 0000EAAB B004                <1> 	mov	al, 4
  7447 0000EAAD 01C7                <1> 	add	edi, eax ; add edi, 4
  7448 0000EAAF 0105[1C010300]      <1> 	add	[u.r0], eax ; +4
  7449 0000EAB5 EBB1                <1> 	jmp	short pix_op_chr_wp_1
  7450                              <1> 
  7451                              <1> m_pix_op_cpy:
  7452                              <1> 	; 26/02/2021
  7453                              <1> 	; 06/02/2021
  7454                              <1> 	; MASKED COPY PIXELS (full screen)
  7455                              <1> 	;
  7456                              <1> 	; jump from pix_op_cpy
  7457                              <1> 	;
  7458                              <1> 	; INPUT:
  7459                              <1> 	;   ecx = transfer count (bytes)
  7460                              <1> 	;   edi = [v_mem] = start address of LFB 
  7461                              <1> 	;   esi = user's buffer address (virtual)
  7462                              <1> 	;
  7463                              <1> 	; OUTPUT:
  7464                              <1> 	;   [u.r0] will be > 0 if succesful
  7465                              <1> 
  7466                              <1> 	; Full screen masked copy
  7467                              <1> 
  7468                              <1> 	; Modified regs: eax, ebx, edx, esi, edi, ecx
  7469                              <1> 
  7470                              <1> m_pix_op_cpy_0:
  7471                              <1> 	;push	ebx ; *** ; 26/02/2021
  7472 0000EAB7 57                  <1> 	push	edi ; **
  7473 0000EAB8 51                  <1> 	push	ecx ; *
  7474 0000EAB9 81F9F8070000        <1> 	cmp	ecx, 2040 ; (3*680) ; 26/02/2021
  7475 0000EABF 7605                <1> 	jna	short m_pix_op_cpy_1
  7476 0000EAC1 B9F8070000          <1> 	mov	ecx, 2040
  7477                              <1> m_pix_op_cpy_1:
  7478 0000EAC6 BF00760900          <1> 	mov	edi, VBE3SAVERESTOREBLOCK ; temporary buff
  7479 0000EACB E823230000          <1> 	call	transfer_from_user_buffer
  7480 0000EAD0 726C                <1> 	jc	short m_pix_op_cpy_3
  7481 0000EAD2 01CE                <1> 	add	esi, ecx
  7482 0000EAD4 89F5                <1> 	mov	ebp, esi  ; save user's buffer address
  7483 0000EAD6 89FE                <1> 	mov	esi, edi
  7484 0000EAD8 89CB                <1> 	mov	ebx, ecx
  7485 0000EADA 59                  <1> 	pop	ecx ; *
  7486 0000EADB 29D9                <1> 	sub	ecx, ebx
  7487 0000EADD 5F                  <1> 	pop	edi ; **
  7488 0000EADE 31D2                <1> 	xor	edx, edx ; 26/02/2021
  7489 0000EAE0 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8
  7490 0000EAE7 7435                <1> 	je	short m_pix_op_cpy_1_8
  7491 0000EAE9 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24
  7492 0000EAF0 776D                <1> 	ja	short m_pix_op_cpy_1_32
  7493 0000EAF2 724D                <1> 	jb	short m_pix_op_cpy_1_16
  7494                              <1> m_pix_op_cpy_1_24:
  7495                              <1> 	; 24 bit masked copy
  7496                              <1> 	;mov	edx, 3
  7497 0000EAF4 B203                <1> 	mov	dl, 3 ; 26/02/2021
  7498                              <1> m_pix_op_cpy_1_24_0:
  7499 0000EAF6 66AD                <1> 	lodsw
  7500 0000EAF8 C1E010              <1> 	shl	eax, 16
  7501 0000EAFB AC                  <1> 	lodsb
  7502 0000EAFC C1C010              <1> 	rol	eax, 16
  7503 0000EAFF 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  7504 0000EB05 740F                <1> 	je	short m_pix_op_cpy_1_24_1 ; exclude
  7505 0000EB07 668907              <1> 	mov	[edi], ax
  7506 0000EB0A C1E810              <1> 	shr	eax, 16
  7507 0000EB0D 884702              <1> 	mov	[edi+2], al
  7508 0000EB10 0115[1C010300]      <1> 	add	[u.r0], edx ; +3
  7509                              <1> m_pix_op_cpy_1_24_1:
  7510 0000EB16 01D7                <1> 	add	edi, edx ; +3
  7511 0000EB18 29D3                <1> 	sub	ebx, edx ; sub ebx, 3
  7512 0000EB1A 77DA                <1> 	ja	short m_pix_op_cpy_1_24_0
  7513 0000EB1C EB15                <1>  	jmp	short m_pix_op_cpy_2
  7514                              <1> 
  7515                              <1> m_pix_op_cpy_1_8:
  7516                              <1> 	; 8 bit masked copy
  7517 0000EB1E AC                  <1> 	lodsb
  7518 0000EB1F 3A05[4E100300]      <1> 	cmp	al, [maskcolor]
  7519 0000EB25 7408                <1> 	je	short m_pix_op_cpy_1_8_1 ; exclude
  7520 0000EB27 8807                <1> 	mov	[edi], al
  7521 0000EB29 FF05[1C010300]      <1> 	inc	dword [u.r0] ; +1
  7522                              <1> m_pix_op_cpy_1_8_1:
  7523 0000EB2F 47                  <1> 	inc	edi ; +1
  7524 0000EB30 4B                  <1> 	dec	ebx 	
  7525 0000EB31 75EB                <1> 	jnz	short m_pix_op_cpy_1_8
  7526                              <1> m_pix_op_cpy_2:
  7527 0000EB33 89EE                <1> 	mov	esi, ebp ; restore user's buffer addr
  7528 0000EB35 09C9                <1> 	or	ecx, ecx
  7529                              <1> 	; 26/02/2021
  7530 0000EB37 7407                <1> 	jz	short m_pix_of_cpy_4
  7531 0000EB39 E979FFFFFF          <1> 	jmp	m_pix_op_cpy_0
  7532                              <1> m_pix_op_cpy_3:
  7533 0000EB3E 59                  <1> 	pop	ecx ; *
  7534 0000EB3F 5F                  <1> 	pop	edi ; **
  7535                              <1> m_pix_of_cpy_4:
  7536                              <1> 	;pop	ebx ; *** ; 26/02/2021 
  7537 0000EB40 C3                  <1> 	retn
  7538                              <1> 
  7539                              <1> m_pix_op_cpy_1_16:
  7540                              <1> 	; 16 bit masked copy
  7541                              <1> 	;mov	edx, 2
  7542 0000EB41 B202                <1> 	mov	dl, 2 ; 26/02/2021
  7543                              <1> m_pix_op_cpy_1_16_0:
  7544 0000EB43 66AD                <1> 	lodsw
  7545 0000EB45 663B05[4E100300]    <1> 	cmp	ax, [maskcolor]
  7546 0000EB4C 7409                <1> 	je	short m_pix_op_cpy_1_16_1 ; exclude
  7547 0000EB4E 668907              <1> 	mov	[edi], ax
  7548 0000EB51 0115[1C010300]      <1> 	add	[u.r0], edx ; +2
  7549                              <1> m_pix_op_cpy_1_16_1:
  7550 0000EB57 01D7                <1> 	add	edi, edx ; +2
  7551 0000EB59 29D3                <1> 	sub	ebx, edx ; sub ebx, 2
  7552 0000EB5B 77E6                <1> 	ja	short m_pix_op_cpy_1_16_0
  7553 0000EB5D EBD4                <1>  	jmp	short m_pix_op_cpy_2
  7554                              <1> 
  7555                              <1> m_pix_op_cpy_1_32:
  7556                              <1> 	; 32 bit masked copy
  7557                              <1> 	;mov	edx, 4
  7558 0000EB5F B204                <1> 	mov	dl, 4 ; 26/02/2021
  7559                              <1> m_pix_op_cpy_1_32_0:
  7560 0000EB61 AD                  <1> 	lodsd
  7561 0000EB62 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  7562 0000EB68 7408                <1> 	je	short m_pix_op_cpy_1_32_1 ; exclude
  7563 0000EB6A 8907                <1> 	mov	[edi], eax
  7564 0000EB6C 0115[1C010300]      <1> 	add	[u.r0], edx ; +4
  7565                              <1> m_pix_op_cpy_1_32_1:
  7566 0000EB72 01D7                <1> 	add	edi, edx ; +4
  7567 0000EB74 29D3                <1> 	sub	ebx, edx ; sub ebx, 4
  7568 0000EB76 77E9                <1> 	ja	short m_pix_op_cpy_1_32_0
  7569 0000EB78 EBB9                <1>  	jmp	short m_pix_op_cpy_2
  7570                              <1> 	
  7571                              <1> m_pix_op_cpy_w:
  7572                              <1> 	; 26/02/2021
  7573                              <1> 	; 06/02/2021
  7574                              <1> 	; MASKED COPY PIXELS (window)
  7575                              <1> 	;
  7576                              <1> 	; jump from pix_op_cpy_w
  7577                              <1> 	;
  7578                              <1> 	; INPUT:
  7579                              <1> 	;   ecx = bytes per row (to be applied)
  7580                              <1> 	;   edx = screen width in bytes
  7581                              <1> 	;   ebx = row count
  7582                              <1> 	;   esi = user's buffer address
  7583                              <1> 	;   [v_str] = window start address
  7584                              <1> 	;
  7585                              <1> 	; OUTPUT:
  7586                              <1> 	;   [u.r0] will be > 0 if succesful
  7587                              <1> 
  7588                              <1> 	; Window masked copy
  7589                              <1> 
  7590                              <1> m_pix_op_cpy_w_0:
  7591 0000EB7A 8B3D[46100300]      <1> 	mov	edi, [v_str]
  7592                              <1> m_pix_op_cpy_w_1:
  7593 0000EB80 57                  <1> 	push	edi
  7594 0000EB81 56                  <1> 	push	esi
  7595 0000EB82 53                  <1> 	push	ebx
  7596 0000EB83 52                  <1> 	push	edx
  7597 0000EB84 51                  <1> 	push	ecx
  7598 0000EB85 E82DFFFFFF          <1> 	call	m_pix_op_cpy ; 26/02/2021
  7599 0000EB8A 59                  <1> 	pop	ecx
  7600 0000EB8B 5A                  <1> 	pop	edx
  7601 0000EB8C 5B                  <1> 	pop	ebx
  7602 0000EB8D 5E                  <1> 	pop	esi
  7603 0000EB8E 5F                  <1> 	pop	edi
  7604 0000EB8F 7209                <1> 	jc	short m_pix_op_cpy_w_2
  7605 0000EB91 4B                  <1> 	dec	ebx
  7606 0000EB92 7406                <1> 	jz	short m_pix_op_cpy_w_2 ; ok.
  7607                              <1> 	; next row
  7608 0000EB94 01CE                <1> 	add	esi, ecx ; next row in user's buffer
  7609 0000EB96 01D7                <1> 	add	edi, edx ; next row of window (system)
  7610 0000EB98 EBE6                <1> 	jmp	short m_pix_op_cpy_w_1
  7611                              <1> m_pix_op_cpy_w_2:
  7612 0000EB9A C3                  <1> 	retn
  7613                              <1> 
  7614                              <1> m_pix_op_new:
  7615                              <1> 	; 06/02/2021
  7616                              <1> 	; CHANGE COLOR (MASKED, full screen)
  7617                              <1> 	;
  7618                              <1> 	; jump from pix_op_new
  7619                              <1> 	;
  7620                              <1> 	; INPUT:
  7621                              <1> 	;   eax = color (AL, AX, EAX)
  7622                              <1> 	;   ecx = [v_siz] ; display page pixel count
  7623                              <1> 	;   esi = edi = [v_mem] ; LFB start address
  7624                              <1> 	;
  7625                              <1> 	;   [maskcolor] = mask color (to be excluded)
  7626                              <1> 	;
  7627                              <1> 	; OUTPUT:
  7628                              <1> 	; 	[u.r0] will be > 0 if succesful
  7629                              <1> 	
  7630                              <1> 	; Full screen
  7631                              <1> m_pix_op_new_0:
  7632 0000EB9B 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  7633 0000EBA2 7717                <1> 	ja	short m_pix_op_new_1
  7634                              <1> 	; 256 colors (8bpp)
  7635                              <1> 	;jmp	short m_pix_op_new_8
  7636                              <1> m_pix_op_new_8:
  7637                              <1> 	; 8 bit colors (256 colors)
  7638 0000EBA4 88C2                <1> 	mov	dl, al ; new color
  7639                              <1> m_pix_op_new_8_0:
  7640 0000EBA6 AC                  <1> 	lodsb 
  7641 0000EBA7 3A05[4E100300]      <1> 	cmp	al, [maskcolor]
  7642 0000EBAD 7408                <1> 	je	short m_pix_op_new_8_1 ; exclude
  7643 0000EBAF 8817                <1> 	mov	[edi], dl
  7644 0000EBB1 FF05[1C010300]      <1> 	inc	dword [u.r0]
  7645                              <1> m_pix_op_new_8_1:
  7646 0000EBB7 47                  <1> 	inc	edi
  7647 0000EBB8 E2EC                <1> 	loop	m_pix_op_new_8_0
  7648 0000EBBA C3                  <1> 	retn
  7649                              <1> m_pix_op_new_1:
  7650 0000EBBB 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  7651 0000EBC2 774B                <1> 	ja	short m_pix_op_new_3 ; 32bpp	
  7652 0000EBC4 722C                <1> 	jb	short m_pix_op_new_2 ; 16bpp
  7653                              <1> 	; 24 bit true colors
  7654                              <1> 	;jmp	short m_pix_op_new_24
  7655                              <1> m_pix_op_new_24:
  7656                              <1> 	; 24 bit true colors
  7657 0000EBC6 89C2                <1> 	mov	edx, eax ; new color
  7658                              <1> m_pix_op_new_24_0:
  7659 0000EBC8 66AD                <1> 	lodsw
  7660 0000EBCA C1E010              <1> 	shl	eax, 16
  7661 0000EBCD AC                  <1> 	lodsb
  7662 0000EBCE C1C010              <1> 	rol	eax, 16	
  7663 0000EBD1 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  7664 0000EBD7 7413                <1> 	je	short m_pix_op_new_24_1 ; exclude
  7665 0000EBD9 668917              <1> 	mov	[edi], dx
  7666 0000EBDC C1CA10              <1> 	ror	edx, 16
  7667 0000EBDF 885702              <1> 	mov	[edi+2], dl
  7668 0000EBE2 C1C210              <1> 	rol	edx, 16
  7669 0000EBE5 8305[1C010300]03    <1> 	add	dword [u.r0], 3
  7670                              <1> m_pix_op_new_24_1:
  7671 0000EBEC 83C703              <1> 	add	edi, 3
  7672 0000EBEF E2D7                <1> 	loop	m_pix_op_new_24_0
  7673 0000EBF1 C3                  <1> 	retn
  7674                              <1> 	; 65536 colors (16bpp)
  7675                              <1> m_pix_op_new_2:
  7676                              <1> 	;jmp	short m_pix_op_new_16
  7677                              <1> m_pix_op_new_16:
  7678                              <1> 	; 16 bit colors (65536 colors)
  7679 0000EBF2 89C2                <1> 	mov	edx, eax ; new color
  7680                              <1> m_pix_op_new_16_0:
  7681 0000EBF4 66AD                <1> 	lodsw
  7682 0000EBF6 663B05[4E100300]    <1> 	cmp	ax, [maskcolor]
  7683 0000EBFD 740A                <1> 	je	short m_pix_op_new_16_1 ; exclude
  7684 0000EBFF 668917              <1> 	mov	[edi], dx
  7685 0000EC02 8305[1C010300]02    <1> 	add	dword [u.r0], 2
  7686                              <1> m_pix_op_new_16_1:
  7687 0000EC09 83C702              <1> 	add	edi, 2
  7688 0000EC0C E2E6                <1> 	loop	m_pix_op_new_16_0
  7689 0000EC0E C3                  <1> 	retn
  7690                              <1> m_pix_op_new_3:
  7691                              <1> 	; 32 bit true colors
  7692                              <1> 	;jmp	short m_pix_op_new_32
  7693                              <1> m_pix_op_new_32:
  7694                              <1> 	; 32 bit true colors
  7695 0000EC0F 89C2                <1> 	mov	edx, eax ; new color
  7696                              <1> m_pix_op_new_32_0:
  7697 0000EC11 AD                  <1> 	lodsd 
  7698 0000EC12 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  7699 0000EC18 7409                <1> 	je	short m_pix_op_new_32_1 ; exclude
  7700 0000EC1A 8917                <1> 	mov	[edi], edx
  7701 0000EC1C 8305[1C010300]04    <1> 	add	dword [u.r0], 4
  7702                              <1> m_pix_op_new_32_1:
  7703 0000EC23 83C704              <1> 	add	edi, 4
  7704 0000EC26 E2E9                <1> 	loop	m_pix_op_new_32_0
  7705 0000EC28 C3                  <1> 	retn
  7706                              <1> 
  7707                              <1> m_pix_op_new_w:
  7708                              <1> 	; 06/02/2021
  7709                              <1> 	; CHANGE COLOR (MASKED, window)
  7710                              <1> 	;
  7711                              <1> 	; jump from pix_op_new_w
  7712                              <1> 	;
  7713                              <1> 	; INPUT:
  7714                              <1> 	;   ecx = bytes per row (to be applied)
  7715                              <1> 	;   edx = screen width in bytes
  7716                              <1> 	;   ebx = row count
  7717                              <1> 	;   eax = color
  7718                              <1> 	;
  7719                              <1> 	;   [maskcolor] = mask color (to be excluded)
  7720                              <1> 	;
  7721                              <1> 	; OUTPUT:
  7722                              <1> 	; 	[u.r0] will be > 0 if succesful
  7723                              <1> 
  7724                              <1> 	; Window
  7725                              <1> 	;mov	edi, [v_str] ; LFB start address
  7726                              <1> 	;mov	esi, edi 
  7727                              <1> 
  7728 0000EC29 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  7729 0000EC30 7707                <1> 	ja	short m_pix_op_new_w_1
  7730                              <1> 
  7731                              <1> 	; 256 colors (8bpp)
  7732 0000EC32 BD[A4EB0000]        <1> 	mov	ebp, m_pix_op_new_8
  7733 0000EC37 EB1E                <1> 	jmp	short m_pix_op_new_w_x
  7734                              <1> 			
  7735                              <1> m_pix_op_new_w_1:
  7736 0000EC39 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  7737 0000EC40 7710                <1> 	ja	short m_pix_op_new_w_3 ; 32bpp
  7738 0000EC42 7207                <1> 	jb	short m_pix_op_new_w_2 ; 16bpp
  7739                              <1> 
  7740                              <1> 	; 24 bit true colors
  7741 0000EC44 BD[C6EB0000]        <1> 	mov	ebp, m_pix_op_new_24
  7742 0000EC49 EB0C                <1> 	jmp	short m_pix_op_new_w_x
  7743                              <1> 
  7744                              <1> 	; 65536 colors (16bpp)
  7745                              <1> m_pix_op_new_w_2:
  7746 0000EC4B BD[F2EB0000]        <1> 	mov	ebp, m_pix_op_new_16
  7747 0000EC50 EB05                <1> 	jmp	short m_pix_op_new_w_x
  7748                              <1> 
  7749                              <1> 	; 32 bit true colors
  7750                              <1> m_pix_op_new_w_3:
  7751 0000EC52 BD[0FEC0000]        <1> 	mov	ebp, m_pix_op_new_32
  7752                              <1> 	;jmp	short m_pix_op_new_w_x
  7753                              <1> 
  7754                              <1> m_pix_op_new_w_x:
  7755                              <1> m_pix_op_add_w_x:
  7756                              <1> m_pix_op_sub_w_x:
  7757                              <1> m_pix_op_mix_w_x:
  7758                              <1> m_pix_op_and_w_x:
  7759                              <1> m_pix_op_orc_w_x:
  7760                              <1> m_pix_op_xor_w_x:
  7761                              <1> m_pix_op_not_w_x:
  7762                              <1> m_pix_op_neg_w_x:
  7763                              <1> m_pix_op_inc_w_x:
  7764                              <1> m_pix_op_dec_w_x:
  7765                              <1> 	; 27/02/2021
  7766                              <1> 	; 26/02/2021
  7767                              <1> 	; 06/02/2021
  7768                              <1> 	; ecx = bytes per row (to be applied)
  7769                              <1> 	; edx = windows (screen) width in bytes
  7770                              <1> 	; ebx = row count
  7771                              <1> 	; eax = color
  7772                              <1> 	; ebp = pixel operation subroutine address
  7773                              <1> 	; edi = esi = window start address
  7774                              <1> 
  7775 0000EC57 8B3D[46100300]      <1> 	mov	edi, [v_str] ; LFB start address
  7776 0000EC5D 89FE                <1> 	mov	esi, edi
  7777                              <1> m_pix_op_w_x_next:
  7778 0000EC5F 52                  <1> 	push	edx
  7779 0000EC60 51                  <1> 	push	ecx
  7780 0000EC61 56                  <1> 	push	esi
  7781 0000EC62 57                  <1> 	push	edi
  7782 0000EC63 50                  <1> 	push	eax ; 26/02/2021
  7783 0000EC64 8B0D[52100300]      <1> 	mov	ecx, [pixcount] ; 27/02/2021  
  7784 0000EC6A FFD5                <1> 	call	ebp ; call masked pixel-row operation
  7785 0000EC6C 58                  <1> 	pop	eax ; 26/02/2021
  7786 0000EC6D 5F                  <1> 	pop	edi
  7787 0000EC6E 5E                  <1> 	pop	esi
  7788 0000EC6F 59                  <1> 	pop	ecx
  7789 0000EC70 5A                  <1> 	pop	edx
  7790 0000EC71 01D6                <1> 	add	esi, edx ; next row
  7791 0000EC73 01D7                <1> 	add	edi, edx ; next row
  7792 0000EC75 4B                  <1> 	dec	ebx
  7793 0000EC76 75E7                <1> 	jnz	short m_pix_op_w_x_next
  7794 0000EC78 C3                  <1> 	retn
  7795                              <1> 
  7796                              <1> m_pix_op_add:
  7797                              <1> 	; 06/02/2021
  7798                              <1> 	; ADD COLOR (MASKED, full screen)
  7799                              <1> 	;
  7800                              <1> 	; jump from pix_op_add
  7801                              <1> 	;
  7802                              <1> 	; INPUT:
  7803                              <1> 	;   eax = color (AL, AX, EAX)
  7804                              <1> 	;   ecx = [v_siz] ; display page pixel count
  7805                              <1> 	;   esi = edi = [v_mem] ; LFB start address
  7806                              <1> 	;
  7807                              <1> 	;   [maskcolor] = mask color (to be excluded)
  7808                              <1> 	;
  7809                              <1> 	; OUTPUT:
  7810                              <1> 	; 	[u.r0] will be > 0 if succesful
  7811                              <1> 	
  7812                              <1> 	; Full screen
  7813                              <1> m_pix_op_add_0:
  7814 0000EC79 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  7815 0000EC80 771C                <1> 	ja	short m_pix_op_add_1
  7816                              <1> 	; 256 colors (8bpp)
  7817                              <1> 	;jmp	short m_pix_op_add_8
  7818                              <1> m_pix_op_add_8:
  7819                              <1> 	; 8 bit colors (256 colors)
  7820 0000EC82 88C2                <1> 	mov	dl, al ; new color
  7821                              <1> m_pix_op_add_8_0:
  7822 0000EC84 AC                  <1> 	lodsb 
  7823 0000EC85 3A05[4E100300]      <1> 	cmp	al, [maskcolor]
  7824 0000EC8B 740D                <1> 	je	short m_pix_op_add_8_1 ; exclude
  7825 0000EC8D FF05[1C010300]      <1> 	inc	dword [u.r0] ; +1
  7826 0000EC93 0017                <1> 	add	[edi], dl
  7827 0000EC95 7303                <1> 	jnc	short m_pix_op_add_8_1
  7828 0000EC97 C607FF              <1> 	mov	byte [edi], 0FFh 
  7829                              <1> m_pix_op_add_8_1:
  7830 0000EC9A 47                  <1> 	inc	edi
  7831 0000EC9B E2E7                <1> 	loop	m_pix_op_add_8_0
  7832 0000EC9D C3                  <1> 	retn
  7833                              <1> m_pix_op_add_1:
  7834 0000EC9E 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  7835 0000ECA5 775E                <1> 	ja	short m_pix_op_add_3 ; 32bpp	
  7836 0000ECA7 7238                <1> 	jb	short m_pix_op_add_2 ; 16bpp
  7837                              <1> 	; 24 bit true colors
  7838                              <1> 	;jmp	short m_pix_op_add_24
  7839                              <1> m_pix_op_add_24:
  7840                              <1> 	; 24 bit true colors
  7841 0000ECA9 89C2                <1> 	mov	edx, eax ; new color
  7842 0000ECAB 81CA000000FF        <1> 	or	edx, 0FF000000h
  7843                              <1> m_pix_op_add_24_0:
  7844 0000ECB1 66AD                <1> 	lodsw
  7845 0000ECB3 C1E010              <1> 	shl	eax, 16
  7846 0000ECB6 AC                  <1> 	lodsb
  7847 0000ECB7 C1C010              <1> 	rol	eax, 16	
  7848 0000ECBA 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  7849 0000ECC0 7419                <1> 	je	short m_pix_op_add_24_2 ; exclude
  7850 0000ECC2 8305[1C010300]03    <1> 	add	dword [u.r0], 3 ; +3
  7851 0000ECC9 01D0                <1> 	add	eax, edx
  7852 0000ECCB 7305                <1> 	jnc	short m_pix_op_add_24_1
  7853 0000ECCD B8FFFFFF00          <1> 	mov	eax, 0FFFFFFh
  7854                              <1> m_pix_op_add_24_1:	
  7855 0000ECD2 668907              <1> 	mov	[edi], ax
  7856 0000ECD5 C1E810              <1> 	shr	eax, 16
  7857 0000ECD8 884702              <1> 	mov	[edi+2], al
  7858                              <1> m_pix_op_add_24_2:
  7859 0000ECDB 83C703              <1> 	add	edi, 3 ; +3
  7860 0000ECDE E2D1                <1> 	loop	m_pix_op_add_24_0
  7861 0000ECE0 C3                  <1> 	retn
  7862                              <1> 	; 65536 colors (16bpp)
  7863                              <1> m_pix_op_add_2:
  7864                              <1> 	;jmp	short m_pix_op_add_16
  7865                              <1> m_pix_op_add_16:
  7866                              <1> 	; 16 bit colors (65536 colors)
  7867 0000ECE1 89C2                <1> 	mov	edx, eax ; new color
  7868                              <1> m_pix_op_add_16_0:
  7869 0000ECE3 66AD                <1> 	lodsw
  7870 0000ECE5 663B05[4E100300]    <1> 	cmp	ax, [maskcolor]
  7871 0000ECEC 7411                <1> 	je	short m_pix_op_add_16_1 ; exclude
  7872 0000ECEE 8305[1C010300]02    <1> 	add	dword [u.r0], 2 ; +2
  7873 0000ECF5 660117              <1> 	add	[edi], dx
  7874 0000ECF8 7305                <1> 	jnc	short m_pix_op_add_16_1
  7875 0000ECFA 66C707FFFF          <1> 	mov	word [edi], 0FFFFh
  7876                              <1> m_pix_op_add_16_1:
  7877 0000ECFF 83C702              <1> 	add	edi, 2 ; +2
  7878 0000ED02 E2DF                <1> 	loop	m_pix_op_add_16_0
  7879 0000ED04 C3                  <1> 	retn
  7880                              <1> m_pix_op_add_3:
  7881                              <1> 	; 32 bit true colors
  7882                              <1> 	;jmp	short m_pix_op_add_32
  7883                              <1> m_pix_op_add_32:
  7884                              <1> 	; 32 bit true colors
  7885 0000ED05 89C2                <1> 	mov	edx, eax ; new color
  7886                              <1> m_pix_op_add_32_0:
  7887 0000ED07 AD                  <1> 	lodsd 
  7888 0000ED08 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  7889 0000ED0E 7411                <1> 	je	short m_pix_op_add_32_1 ; exclude
  7890 0000ED10 8305[1C010300]04    <1> 	add	dword [u.r0], 4 ; +4
  7891 0000ED17 0117                <1> 	add	[edi], edx
  7892 0000ED19 7306                <1> 	jnc	short m_pix_op_add_32_1
  7893 0000ED1B C707FFFFFFFF        <1> 	mov	dword [edi], 0FFFFFFFFh
  7894                              <1> m_pix_op_add_32_1:
  7895 0000ED21 83C704              <1> 	add	edi, 4 ; +4
  7896 0000ED24 E2E1                <1> 	loop	m_pix_op_add_32_0
  7897 0000ED26 C3                  <1> 	retn
  7898                              <1> 
  7899                              <1> m_pix_op_add_w:
  7900                              <1> 	; 06/02/2021
  7901                              <1> 	; ADD COLOR (MASKED, window)
  7902                              <1> 	;
  7903                              <1> 	; jump from pix_op_add_w
  7904                              <1> 	;
  7905                              <1> 	; INPUT:
  7906                              <1> 	;   ecx = bytes per row (to be applied)
  7907                              <1> 	;   edx = screen width in bytes
  7908                              <1> 	;   ebx = row count
  7909                              <1> 	;   eax = color
  7910                              <1> 	;
  7911                              <1> 	;   [maskcolor] = mask color (to be excluded)
  7912                              <1> 	;
  7913                              <1> 	; OUTPUT:
  7914                              <1> 	; 	[u.r0] will be > 0 if succesful
  7915                              <1> 
  7916                              <1> 	; window
  7917                              <1> 	;mov	edi, [v_str] ; LFB start address
  7918                              <1> 	;mov	esi, edi 
  7919                              <1> 
  7920 0000ED27 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  7921 0000ED2E 7707                <1> 	ja	short m_pix_op_add_w_1
  7922                              <1> 
  7923                              <1> 	; 256 colors (8bpp)
  7924 0000ED30 BD[82EC0000]        <1> 	mov	ebp, m_pix_op_add_8
  7925 0000ED35 EB1E                <1> 	jmp	short m_pix_op_add_w_4
  7926                              <1> 			
  7927                              <1> m_pix_op_add_w_1:
  7928 0000ED37 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  7929 0000ED3E 7710                <1> 	ja	short m_pix_op_add_w_3 ; 32bpp
  7930 0000ED40 7207                <1> 	jb	short m_pix_op_add_w_2 ; 16bpp
  7931                              <1> 
  7932                              <1> 	; 24 bit true colors
  7933 0000ED42 BD[A9EC0000]        <1> 	mov	ebp, m_pix_op_add_24
  7934 0000ED47 EB0C                <1> 	jmp	short m_pix_op_add_w_4
  7935                              <1> 
  7936                              <1> 	; 65536 colors (16bpp)
  7937                              <1> m_pix_op_add_w_2:
  7938 0000ED49 BD[E1EC0000]        <1> 	mov	ebp, m_pix_op_add_16
  7939 0000ED4E EB05                <1> 	jmp	short m_pix_op_add_w_4
  7940                              <1> 
  7941                              <1> 	; 32 bit true colors
  7942                              <1> m_pix_op_add_w_3:
  7943 0000ED50 BD[05ED0000]        <1> 	mov	ebp, m_pix_op_add_32
  7944                              <1> m_pix_op_add_w_4:
  7945 0000ED55 E9FDFEFFFF          <1> 	jmp	m_pix_op_add_w_x
  7946                              <1> 
  7947                              <1> m_pix_op_sub:
  7948                              <1> 	; 02/03/2021
  7949                              <1> 	; 06/02/2021
  7950                              <1> 	; SUBTRACT COLOR (MASKED, full screen)
  7951                              <1> 	;
  7952                              <1> 	; jump from pix_op_sub
  7953                              <1> 	;
  7954                              <1> 	; INPUT:
  7955                              <1> 	;   eax = color (AL, AX, EAX)
  7956                              <1> 	;   ecx = [v_siz] ; display page pixel count
  7957                              <1> 	;   esi = edi = [v_mem] ; LFB start address
  7958                              <1> 	;
  7959                              <1> 	;   [maskcolor] = mask color (to be excluded)
  7960                              <1> 	;
  7961                              <1> 	; OUTPUT:
  7962                              <1> 	; 	[u.r0] will be > 0 if succesful
  7963                              <1> 	
  7964                              <1> 	; Full screen
  7965                              <1> m_pix_op_sub_0:
  7966 0000ED5A 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  7967 0000ED61 771C                <1> 	ja	short m_pix_op_sub_1
  7968                              <1> 	; 256 colors (8bpp)
  7969                              <1> 	;jmp	short m_pix_op_sub_8
  7970                              <1> m_pix_op_sub_8:
  7971                              <1> 	; 8 bit colors (256 colors)
  7972 0000ED63 88C2                <1> 	mov	dl, al ; new color
  7973                              <1> m_pix_op_sub_8_0:
  7974 0000ED65 AC                  <1> 	lodsb 
  7975 0000ED66 3A05[4E100300]      <1> 	cmp	al, [maskcolor]
  7976 0000ED6C 740D                <1> 	je	short m_pix_op_sub_8_1 ; exclude
  7977 0000ED6E FF05[1C010300]      <1> 	inc	dword [u.r0] ; +1
  7978 0000ED74 2817                <1> 	sub	[edi], dl
  7979 0000ED76 7303                <1> 	jnb	short m_pix_op_sub_8_1
  7980 0000ED78 C60700              <1> 	mov	byte [edi], 0 
  7981                              <1> m_pix_op_sub_8_1:
  7982 0000ED7B 47                  <1> 	inc	edi
  7983 0000ED7C E2E7                <1> 	loop	m_pix_op_sub_8_0
  7984 0000ED7E C3                  <1> 	retn
  7985                              <1> m_pix_op_sub_1:
  7986 0000ED7F 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  7987 0000ED86 7755                <1> 	ja	short m_pix_op_sub_3 ; 32bpp	
  7988 0000ED88 722F                <1> 	jb	short m_pix_op_sub_2 ; 16bpp
  7989                              <1> 	; 24 bit true colors
  7990                              <1> 	;jmp	short m_pix_op_sub_24
  7991                              <1> m_pix_op_sub_24:
  7992                              <1> 	; 24 bit true colors
  7993 0000ED8A 89C2                <1> 	mov	edx, eax ; new color
  7994                              <1> 	; 02/03/2021
  7995                              <1> m_pix_op_sub_24_0:
  7996 0000ED8C 66AD                <1> 	lodsw
  7997 0000ED8E C1E010              <1> 	shl	eax, 16
  7998 0000ED91 AC                  <1> 	lodsb
  7999 0000ED92 C1C010              <1> 	rol	eax, 16	
  8000 0000ED95 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8001 0000ED9B 7416                <1> 	je	short m_pix_op_sub_24_2 ; exclude
  8002 0000ED9D 8305[1C010300]03    <1> 	add	dword [u.r0], 3 ; +3
  8003 0000EDA4 29D0                <1> 	sub	eax, edx
  8004 0000EDA6 7302                <1> 	jnb	short m_pix_op_sub_24_1
  8005 0000EDA8 31C0                <1> 	xor	eax, eax ; 0
  8006                              <1> m_pix_op_sub_24_1:	
  8007 0000EDAA 668907              <1> 	mov	[edi], ax
  8008 0000EDAD C1E810              <1> 	shr	eax, 16
  8009 0000EDB0 884702              <1> 	mov	[edi+2], al
  8010                              <1> m_pix_op_sub_24_2:
  8011 0000EDB3 83C703              <1> 	add	edi, 3 ; +3
  8012 0000EDB6 E2D4                <1> 	loop	m_pix_op_sub_24_0
  8013 0000EDB8 C3                  <1> 	retn
  8014                              <1> 	; 65536 colors (16bpp)
  8015                              <1> m_pix_op_sub_2:
  8016                              <1> 	;jmp	short m_pix_op_sub_16
  8017                              <1> m_pix_op_sub_16:
  8018                              <1> 	; 16 bit colors (65536 colors)
  8019 0000EDB9 89C2                <1> 	mov	edx, eax ; new color
  8020                              <1> m_pix_op_sub_16_0:
  8021 0000EDBB 66AD                <1> 	lodsw
  8022 0000EDBD 663B05[4E100300]    <1> 	cmp	ax, [maskcolor]
  8023 0000EDC4 7411                <1> 	je	short m_pix_op_sub_16_1 ; exclude
  8024 0000EDC6 8305[1C010300]02    <1> 	add	dword [u.r0], 2 ; +2
  8025 0000EDCD 662917              <1> 	sub	[edi], dx
  8026 0000EDD0 7305                <1> 	jnb	short m_pix_op_sub_16_1
  8027 0000EDD2 31C0                <1> 	xor	eax, eax
  8028 0000EDD4 668907              <1> 	mov	[edi], ax ; 0
  8029                              <1> m_pix_op_sub_16_1:
  8030 0000EDD7 83C702              <1> 	add	edi, 2 ; +2
  8031 0000EDDA E2DF                <1> 	loop	m_pix_op_sub_16_0
  8032 0000EDDC C3                  <1> 	retn
  8033                              <1> m_pix_op_sub_3:
  8034                              <1> 	; 32 bit true colors
  8035                              <1> 	;jmp	short m_pix_op_sub_32
  8036                              <1> m_pix_op_sub_32:
  8037                              <1> 	; 32 bit true colors
  8038 0000EDDD 89C2                <1> 	mov	edx, eax ; new color
  8039                              <1> m_pix_op_sub_32_0:
  8040 0000EDDF AD                  <1> 	lodsd 
  8041 0000EDE0 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8042 0000EDE6 740F                <1> 	je	short m_pix_op_sub_32_1 ; exclude
  8043 0000EDE8 8305[1C010300]04    <1> 	add	dword [u.r0], 4 ; +4
  8044 0000EDEF 2917                <1> 	sub	[edi], edx
  8045 0000EDF1 7304                <1> 	jnb	short m_pix_op_sub_32_1
  8046 0000EDF3 31C0                <1> 	xor	eax, eax
  8047 0000EDF5 8907                <1> 	mov	[edi], eax ; 0
  8048                              <1> m_pix_op_sub_32_1:
  8049 0000EDF7 83C704              <1> 	add	edi, 4 ; +4
  8050 0000EDFA E2E3                <1> 	loop	m_pix_op_sub_32_0
  8051 0000EDFC C3                  <1> 	retn
  8052                              <1> 
  8053                              <1> m_pix_op_sub_w:
  8054                              <1> 	; 06/02/2021
  8055                              <1> 	; SUBTRACT COLOR (MASKED, window)
  8056                              <1> 	;
  8057                              <1> 	; jump from pix_op_sub_w
  8058                              <1> 	;
  8059                              <1> 	; INPUT:
  8060                              <1> 	;   ecx = bytes per row (to be applied)
  8061                              <1> 	;   edx = screen width in bytes
  8062                              <1> 	;   ebx = row count
  8063                              <1> 	;   eax = color
  8064                              <1> 	;
  8065                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8066                              <1> 	;
  8067                              <1> 	; OUTPUT:
  8068                              <1> 	; 	[u.r0] will be > 0 if succesful
  8069                              <1> 
  8070                              <1> 	; window
  8071                              <1> 	;mov	edi, [v_str] ; LFB start address
  8072                              <1> 	;mov	esi, edi 
  8073                              <1> 
  8074 0000EDFD 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8075 0000EE04 7707                <1> 	ja	short m_pix_op_sub_w_1
  8076                              <1> 
  8077                              <1> 	; 256 colors (8bpp)
  8078 0000EE06 BD[63ED0000]        <1> 	mov	ebp, m_pix_op_sub_8
  8079 0000EE0B EB1E                <1> 	jmp	short m_pix_op_sub_w_4
  8080                              <1> 			
  8081                              <1> m_pix_op_sub_w_1:
  8082 0000EE0D 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8083 0000EE14 7710                <1> 	ja	short m_pix_op_sub_w_3 ; 32bpp
  8084 0000EE16 7207                <1> 	jb	short m_pix_op_sub_w_2 ; 16bpp
  8085                              <1> 
  8086                              <1> 	; 24 bit true colors
  8087 0000EE18 BD[8AED0000]        <1> 	mov	ebp, m_pix_op_sub_24
  8088 0000EE1D EB0C                <1> 	jmp	short m_pix_op_sub_w_4
  8089                              <1> 
  8090                              <1> 	; 65536 colors (16bpp)
  8091                              <1> m_pix_op_sub_w_2:
  8092 0000EE1F BD[B9ED0000]        <1> 	mov	ebp, m_pix_op_sub_16
  8093 0000EE24 EB05                <1> 	jmp	short m_pix_op_sub_w_4
  8094                              <1> 
  8095                              <1> 	; 32 bit true colors
  8096                              <1> m_pix_op_sub_w_3:
  8097 0000EE26 BD[DDED0000]        <1> 	mov	ebp, m_pix_op_sub_32
  8098                              <1> m_pix_op_sub_w_4:
  8099 0000EE2B E927FEFFFF          <1> 	jmp	m_pix_op_sub_w_x
  8100                              <1> 
  8101                              <1> m_pix_op_mix:
  8102                              <1> 	; 25/02/2021
  8103                              <1> 	; 06/02/2021
  8104                              <1> 	; MIX COLOR (MASKED, full screen)
  8105                              <1> 	;
  8106                              <1> 	; jump from pix_op_mix
  8107                              <1> 	;
  8108                              <1> 	; INPUT:
  8109                              <1> 	;   eax = color (AL, AX, EAX)
  8110                              <1> 	;   ecx = [v_siz] ; display page pixel count
  8111                              <1> 	;   esi = edi = [v_mem] ; LFB start address
  8112                              <1> 	;
  8113                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8114                              <1> 	;
  8115                              <1> 	; OUTPUT:
  8116                              <1> 	; 	[u.r0] will be > 0 if succesful
  8117                              <1> 	
  8118                              <1> 	; Full screen
  8119                              <1> m_pix_op_mix_0:
  8120 0000EE30 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8121 0000EE37 771B                <1> 	ja	short m_pix_op_mix_1
  8122                              <1> 	; 256 colors (8bpp)
  8123                              <1> 	;jmp	short m_pix_op_mix_8
  8124                              <1> m_pix_op_mix_8:
  8125                              <1> 	; 8 bit colors (256 colors)
  8126 0000EE39 88C2                <1> 	mov	dl, al ; new (mixing) color
  8127                              <1> m_pix_op_mix_8_0:
  8128 0000EE3B AC                  <1> 	lodsb 
  8129 0000EE3C 3A05[4E100300]      <1> 	cmp	al, [maskcolor]
  8130 0000EE42 740C                <1> 	je	short m_pix_op_mix_8_1 ; exclude
  8131 0000EE44 00D0                <1> 	add	al, dl ; 25/02/2021
  8132 0000EE46 D0D8                <1> 	rcr	al, 1	
  8133 0000EE48 8807                <1> 	mov	[edi], al
  8134 0000EE4A FF05[1C010300]      <1> 	inc	dword [u.r0] ; +1
  8135                              <1> m_pix_op_mix_8_1:
  8136 0000EE50 47                  <1> 	inc	edi
  8137 0000EE51 E2E8                <1> 	loop	m_pix_op_mix_8_0
  8138 0000EE53 C3                  <1> 	retn
  8139                              <1> m_pix_op_mix_1:
  8140 0000EE54 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8141 0000EE5B 7752                <1> 	ja	short m_pix_op_mix_3 ; 32bpp	
  8142 0000EE5D 722D                <1> 	jb	short m_pix_op_mix_2 ; 16bpp
  8143                              <1> 	; 24 bit true colors
  8144                              <1> 	;jmp	short m_pix_op_mix_24
  8145                              <1> m_pix_op_mix_24:
  8146                              <1> 	; 24 bit true colors
  8147 0000EE5F 89C2                <1> 	mov	edx, eax ; new color
  8148                              <1> 	;and	edx, 0FFFFFFh
  8149                              <1> m_pix_op_mix_24_0:
  8150 0000EE61 66AD                <1> 	lodsw
  8151 0000EE63 C1E010              <1> 	shl	eax, 16
  8152 0000EE66 AC                  <1> 	lodsb
  8153 0000EE67 C1C010              <1> 	rol	eax, 16	
  8154 0000EE6A 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8155 0000EE70 7414                <1> 	je	short m_pix_op_mix_24_1 ; exclude
  8156 0000EE72 01D0                <1> 	add	eax, edx
  8157 0000EE74 D1E8                <1> 	shr	eax, 1
  8158 0000EE76 668907              <1> 	mov	[edi], ax
  8159 0000EE79 C1E810              <1> 	shr	eax, 16
  8160 0000EE7C 884702              <1> 	mov	[edi+2], al
  8161 0000EE7F 8305[1C010300]03    <1> 	add	dword [u.r0], 3 ; +3
  8162                              <1> m_pix_op_mix_24_1:
  8163 0000EE86 83C703              <1> 	add	edi, 3 ; +3
  8164 0000EE89 E2D6                <1> 	loop	m_pix_op_mix_24_0
  8165 0000EE8B C3                  <1> 	retn
  8166                              <1> 	; 65536 colors (16bpp)
  8167                              <1> m_pix_op_mix_2:
  8168                              <1> 	;jmp	short m_pix_op_mix_16
  8169                              <1> m_pix_op_mix_16:
  8170                              <1> 	; 16 bit colors (65536 colors)
  8171 0000EE8C 89C2                <1> 	mov	edx, eax ; new color
  8172                              <1> 	;and	edx, 0FFFFh
  8173                              <1> m_pix_op_mix_16_0:
  8174 0000EE8E 66AD                <1> 	lodsw
  8175 0000EE90 663B05[4E100300]    <1> 	cmp	ax, [maskcolor]
  8176 0000EE97 7410                <1> 	je	short m_pix_op_mix_16_1 ; exclude
  8177 0000EE99 6601D0              <1> 	add	ax, dx
  8178 0000EE9C 66D1D8              <1> 	rcr	ax, 1
  8179 0000EE9F 668907              <1> 	mov	[edi], ax
  8180 0000EEA2 8305[1C010300]02    <1> 	add	dword [u.r0], 2 ; +2
  8181                              <1> m_pix_op_mix_16_1:
  8182 0000EEA9 83C702              <1> 	add	edi, 2 ; +2
  8183 0000EEAC E2E0                <1> 	loop	m_pix_op_mix_16_0
  8184 0000EEAE C3                  <1> 	retn
  8185                              <1> m_pix_op_mix_3:
  8186                              <1> 	; 32 bit true colors
  8187                              <1> 	;jmp	short m_pix_op_mix_32
  8188                              <1> m_pix_op_mix_32:
  8189                              <1> 	; 32 bit true colors
  8190 0000EEAF 89C2                <1> 	mov	edx, eax ; new color
  8191                              <1> m_pix_op_mix_32_0:
  8192 0000EEB1 AD                  <1> 	lodsd 
  8193 0000EEB2 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8194 0000EEB8 740D                <1> 	je	short m_pix_op_mix_32_1 ; exclude
  8195 0000EEBA 01D0                <1> 	add	eax, edx
  8196                              <1> 	; 02/03/2021
  8197 0000EEBC D1D8                <1> 	rcr	eax, 1
  8198 0000EEBE 8907                <1> 	mov	[edi], eax	
  8199 0000EEC0 8305[1C010300]04    <1> 	add	dword [u.r0], 4 ; +4
  8200                              <1> m_pix_op_mix_32_1:
  8201 0000EEC7 83C704              <1> 	add	edi, 4 ; +4
  8202 0000EECA E2E5                <1> 	loop	m_pix_op_mix_32_0
  8203 0000EECC C3                  <1> 	retn
  8204                              <1> 
  8205                              <1> m_pix_op_mix_w:
  8206                              <1> 	; 06/02/2021
  8207                              <1> 	; MIX COLOR (MASKED, window)
  8208                              <1> 	;
  8209                              <1> 	; jump from pix_op_mix_w
  8210                              <1> 	;
  8211                              <1> 	; INPUT:
  8212                              <1> 	;   ecx = bytes per row (to be applied)
  8213                              <1> 	;   edx = screen width in bytes
  8214                              <1> 	;   ebx = row count
  8215                              <1> 	;   eax = color
  8216                              <1> 	;
  8217                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8218                              <1> 	;
  8219                              <1> 	; OUTPUT:
  8220                              <1> 	; 	[u.r0] will be > 0 if succesful
  8221                              <1> 
  8222                              <1> 	; window
  8223                              <1> 	;mov	edi, [v_str] ; LFB start address
  8224                              <1> 	;mov	esi, edi 
  8225                              <1> 
  8226 0000EECD 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8227 0000EED4 7707                <1> 	ja	short m_pix_op_mix_w_1
  8228                              <1> 
  8229                              <1> 	; 256 colors (8bpp)
  8230 0000EED6 BD[39EE0000]        <1> 	mov	ebp, m_pix_op_mix_8
  8231 0000EEDB EB1E                <1> 	jmp	short m_pix_op_mix_w_4
  8232                              <1> 			
  8233                              <1> m_pix_op_mix_w_1:
  8234 0000EEDD 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8235 0000EEE4 7710                <1> 	ja	short m_pix_op_mix_w_3 ; 32bpp
  8236 0000EEE6 7207                <1> 	jb	short m_pix_op_mix_w_2 ; 16bpp
  8237                              <1> 
  8238                              <1> 	; 24 bit true colors
  8239 0000EEE8 BD[5FEE0000]        <1> 	mov	ebp, m_pix_op_mix_24
  8240 0000EEED EB0C                <1> 	jmp	short m_pix_op_mix_w_4
  8241                              <1> 
  8242                              <1> 	; 65536 colors (16bpp)
  8243                              <1> m_pix_op_mix_w_2:
  8244 0000EEEF BD[8CEE0000]        <1> 	mov	ebp, m_pix_op_mix_16
  8245 0000EEF4 EB05                <1> 	jmp	short m_pix_op_mix_w_4
  8246                              <1> 
  8247                              <1> 	; 32 bit true colors
  8248                              <1> m_pix_op_mix_w_3:
  8249 0000EEF6 BD[AFEE0000]        <1> 	mov	ebp, m_pix_op_mix_32
  8250                              <1> m_pix_op_mix_w_4:
  8251 0000EEFB E957FDFFFF          <1> 	jmp	m_pix_op_mix_w_x
  8252                              <1> 
  8253                              <1> m_pix_op_and:
  8254                              <1> 	; 06/02/2021
  8255                              <1> 	; AND COLOR (MASKED, full screen)
  8256                              <1> 	;
  8257                              <1> 	; jump from pix_op_and
  8258                              <1> 	;
  8259                              <1> 	; INPUT:
  8260                              <1> 	;   eax = color (AL, AX, EAX)
  8261                              <1> 	;   ecx = [v_siz] ; display page pixel count
  8262                              <1> 	;   esi = edi = [v_mem] ; LFB start address
  8263                              <1> 	;
  8264                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8265                              <1> 	;
  8266                              <1> 	; OUTPUT:
  8267                              <1> 	; 	[u.r0] will be > 0 if succesful
  8268                              <1> 	
  8269                              <1> 	; Full screen
  8270                              <1> m_pix_op_and_0:
  8271 0000EF00 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8272 0000EF07 7717                <1> 	ja	short m_pix_op_and_1
  8273                              <1> 	; 256 colors (8bpp)
  8274                              <1> 	;jmp	short m_pix_op_and_8
  8275                              <1> m_pix_op_and_8:
  8276                              <1> 	; 8 bit colors (256 colors)
  8277 0000EF09 88C2                <1> 	mov	dl, al ; new color
  8278                              <1> m_pix_op_and_8_0:
  8279 0000EF0B AC                  <1> 	lodsb 
  8280 0000EF0C 3A05[4E100300]      <1> 	cmp	al, [maskcolor]
  8281 0000EF12 7408                <1> 	je	short m_pix_op_and_8_1 ; exclude
  8282 0000EF14 2017                <1> 	and	[edi], dl
  8283 0000EF16 FF05[1C010300]      <1> 	inc	dword [u.r0] ; +1
  8284                              <1> m_pix_op_and_8_1:
  8285 0000EF1C 47                  <1> 	inc	edi
  8286 0000EF1D E2EC                <1> 	loop	m_pix_op_and_8_0
  8287 0000EF1F C3                  <1> 	retn
  8288                              <1> m_pix_op_and_1:
  8289 0000EF20 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8290 0000EF27 774A                <1> 	ja	short m_pix_op_and_3 ; 32bpp	
  8291 0000EF29 722B                <1> 	jb	short m_pix_op_and_2 ; 16bpp
  8292                              <1> 	; 24 bit true colors
  8293                              <1> 	;jmp	short m_pix_op_and_24
  8294                              <1> m_pix_op_and_24:
  8295                              <1> 	; 24 bit true colors
  8296 0000EF2B 89C2                <1> 	mov	edx, eax ; new color
  8297                              <1> 	;and	edx, 0FFFFFFh
  8298                              <1> m_pix_op_and_24_0:
  8299 0000EF2D 66AD                <1> 	lodsw
  8300 0000EF2F C1E010              <1> 	shl	eax, 16
  8301 0000EF32 AC                  <1> 	lodsb
  8302 0000EF33 C1C010              <1> 	rol	eax, 16	
  8303 0000EF36 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8304 0000EF3C 7412                <1> 	je	short m_pix_op_and_24_1 ; exclude
  8305 0000EF3E 21D0                <1> 	and	eax, edx
  8306 0000EF40 668907              <1> 	mov	[edi], ax
  8307 0000EF43 C1E810              <1> 	shr	eax, 16
  8308 0000EF46 884702              <1> 	mov	[edi+2], al
  8309 0000EF49 8305[1C010300]03    <1> 	add	dword [u.r0], 3 ; +3
  8310                              <1> m_pix_op_and_24_1:
  8311 0000EF50 83C703              <1> 	add	edi, 3 ; +3
  8312 0000EF53 E2D8                <1> 	loop	m_pix_op_and_24_0
  8313 0000EF55 C3                  <1> 	retn
  8314                              <1> 	; 65536 colors (16bpp)
  8315                              <1> m_pix_op_and_2:
  8316                              <1> 	;jmp	short m_pix_op_and_16
  8317                              <1> m_pix_op_and_16:
  8318                              <1> 	; 16 bit colors (65536 colors)
  8319 0000EF56 89C2                <1> 	mov	edx, eax ; new color
  8320                              <1> 	;and	edx, 0FFFFh
  8321                              <1> m_pix_op_and_16_0:
  8322 0000EF58 66AD                <1> 	lodsw
  8323 0000EF5A 663B05[4E100300]    <1> 	cmp	ax, [maskcolor]
  8324 0000EF61 740A                <1> 	je	short m_pix_op_and_16_1 ; exclude
  8325 0000EF63 662117              <1> 	and	[edi], dx
  8326 0000EF66 8305[1C010300]02    <1> 	add	dword [u.r0], 2 ; +2
  8327                              <1> m_pix_op_and_16_1:
  8328 0000EF6D 83C702              <1> 	add	edi, 2 ; +2
  8329 0000EF70 E2E6                <1> 	loop	m_pix_op_and_16_0
  8330 0000EF72 C3                  <1> 	retn
  8331                              <1> m_pix_op_and_3:
  8332                              <1> 	; 32 bit true colors
  8333                              <1> 	;jmp	short m_pix_op_and_32
  8334                              <1> m_pix_op_and_32:
  8335                              <1> 	; 32 bit true colors
  8336 0000EF73 89C2                <1> 	mov	edx, eax ; new color
  8337                              <1> m_pix_op_and_32_0:
  8338 0000EF75 AD                  <1> 	lodsd 
  8339 0000EF76 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8340 0000EF7C 7409                <1> 	je	short m_pix_op_and_32_1 ; exclude
  8341 0000EF7E 2117                <1> 	and	[edi], edx ; 25/02/2021	
  8342 0000EF80 8305[1C010300]04    <1> 	add	dword [u.r0], 4 ; +4
  8343                              <1> m_pix_op_and_32_1:
  8344 0000EF87 83C704              <1> 	add	edi, 4 ; +4
  8345 0000EF8A E2E9                <1> 	loop	m_pix_op_and_32_0
  8346 0000EF8C C3                  <1> 	retn
  8347                              <1> 
  8348                              <1> m_pix_op_and_w:
  8349                              <1> 	; 06/02/2021
  8350                              <1> 	; AND COLOR (MASKED, window)
  8351                              <1> 	;
  8352                              <1> 	; jump from pix_op_and_w
  8353                              <1> 	;
  8354                              <1> 	; INPUT:
  8355                              <1> 	;   ecx = bytes per row (to be applied)
  8356                              <1> 	;   edx = screen width in bytes
  8357                              <1> 	;   ebx = row count
  8358                              <1> 	;   eax = color
  8359                              <1> 	;
  8360                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8361                              <1> 	;
  8362                              <1> 	; OUTPUT:
  8363                              <1> 	; 	[u.r0] will be > 0 if succesful
  8364                              <1> 
  8365                              <1> 	; window
  8366                              <1> 	;mov	edi, [v_str] ; LFB start address
  8367                              <1> 	;mov	esi, edi 
  8368                              <1> 
  8369 0000EF8D 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8370 0000EF94 7707                <1> 	ja	short m_pix_op_and_w_1
  8371                              <1> 
  8372                              <1> 	; 256 colors (8bpp)
  8373 0000EF96 BD[09EF0000]        <1> 	mov	ebp, m_pix_op_and_8
  8374 0000EF9B EB1E                <1> 	jmp	short m_pix_op_and_w_4
  8375                              <1> 			
  8376                              <1> m_pix_op_and_w_1:
  8377 0000EF9D 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8378 0000EFA4 7710                <1> 	ja	short m_pix_op_and_w_3 ; 32bpp
  8379 0000EFA6 7207                <1> 	jb	short m_pix_op_and_w_2 ; 16bpp
  8380                              <1> 
  8381                              <1> 	; 24 bit true colors
  8382 0000EFA8 BD[2BEF0000]        <1> 	mov	ebp, m_pix_op_and_24
  8383 0000EFAD EB0C                <1> 	jmp	short m_pix_op_and_w_4
  8384                              <1> 
  8385                              <1> 	; 65536 colors (16bpp)
  8386                              <1> m_pix_op_and_w_2:
  8387 0000EFAF BD[56EF0000]        <1> 	mov	ebp, m_pix_op_and_16
  8388 0000EFB4 EB05                <1> 	jmp	short m_pix_op_and_w_4
  8389                              <1> 
  8390                              <1> 	; 32 bit true colors
  8391                              <1> m_pix_op_and_w_3:
  8392 0000EFB6 BD[73EF0000]        <1> 	mov	ebp, m_pix_op_and_32
  8393                              <1> m_pix_op_and_w_4:
  8394 0000EFBB E997FCFFFF          <1> 	jmp	m_pix_op_and_w_x
  8395                              <1> 
  8396                              <1> m_pix_op_or:
  8397                              <1> 	; 06/02/2021
  8398                              <1> 	; OR COLOR (MASKED, full screen)
  8399                              <1> 	;
  8400                              <1> 	; jump from pix_op_orc
  8401                              <1> 	;
  8402                              <1> 	; INPUT:
  8403                              <1> 	;   eax = color (AL, AX, EAX)
  8404                              <1> 	;   ecx = [v_siz] ; display page pixel count
  8405                              <1> 	;   esi = edi = [v_mem] ; LFB start address
  8406                              <1> 	;
  8407                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8408                              <1> 	;
  8409                              <1> 	; OUTPUT:
  8410                              <1> 	; 	[u.r0] will be > 0 if succesful
  8411                              <1> 	
  8412                              <1> 	; Full screen
  8413                              <1> m_pix_op_or_0:
  8414 0000EFC0 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8415 0000EFC7 7717                <1> 	ja	short m_pix_op_or_1
  8416                              <1> 	; 256 colors (8bpp)
  8417                              <1> 	;jmp	short m_pix_op_or_8
  8418                              <1> m_pix_op_or_8:
  8419                              <1> 	; 8 bit colors (256 colors)
  8420 0000EFC9 88C2                <1> 	mov	dl, al ; new color
  8421                              <1> m_pix_op_or_8_0:
  8422 0000EFCB AC                  <1> 	lodsb 
  8423 0000EFCC 3A05[4E100300]      <1> 	cmp	al, [maskcolor]
  8424 0000EFD2 7408                <1> 	je	short m_pix_op_or_8_1 ; exclude
  8425 0000EFD4 0817                <1> 	or	[edi], dl
  8426 0000EFD6 FF05[1C010300]      <1> 	inc	dword [u.r0] ; +1
  8427                              <1> m_pix_op_or_8_1:
  8428 0000EFDC 47                  <1> 	inc	edi
  8429 0000EFDD E2EC                <1> 	loop	m_pix_op_or_8_0
  8430 0000EFDF C3                  <1> 	retn
  8431                              <1> m_pix_op_or_1:
  8432 0000EFE0 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8433 0000EFE7 774A                <1> 	ja	short m_pix_op_or_3 ; 32bpp	
  8434 0000EFE9 722B                <1> 	jb	short m_pix_op_or_2 ; 16bpp
  8435                              <1> 	; 24 bit true colors
  8436                              <1> 	;jmp	short m_pix_op_or_24
  8437                              <1> m_pix_op_or_24:
  8438                              <1> 	; 24 bit true colors
  8439 0000EFEB 89C2                <1> 	mov	edx, eax ; new color
  8440                              <1> 	;and	edx, 0FFFFFFh
  8441                              <1> m_pix_op_or_24_0:
  8442 0000EFED 66AD                <1> 	lodsw
  8443 0000EFEF C1E010              <1> 	shl	eax, 16
  8444 0000EFF2 AC                  <1> 	lodsb
  8445 0000EFF3 C1C010              <1> 	rol	eax, 16	
  8446 0000EFF6 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8447 0000EFFC 7412                <1> 	je	short m_pix_op_or_24_1 ; exclude
  8448 0000EFFE 09D0                <1> 	or	eax, edx
  8449 0000F000 668907              <1> 	mov	[edi], ax
  8450 0000F003 C1E810              <1> 	shr	eax, 16
  8451 0000F006 884702              <1> 	mov	[edi+2], al
  8452 0000F009 8305[1C010300]03    <1> 	add	dword [u.r0], 3 ; +3
  8453                              <1> m_pix_op_or_24_1:
  8454 0000F010 83C703              <1> 	add	edi, 3 ; +3
  8455 0000F013 E2D8                <1> 	loop	m_pix_op_or_24_0
  8456 0000F015 C3                  <1> 	retn
  8457                              <1> 	; 65536 colors (16bpp)
  8458                              <1> m_pix_op_or_2:
  8459                              <1> 	;jmp	short m_pix_op_or_16
  8460                              <1> m_pix_op_or_16:
  8461                              <1> 	; 16 bit colors (65536 colors)
  8462 0000F016 89C2                <1> 	mov	edx, eax ; new color
  8463                              <1> 	;and	edx, 0FFFFh
  8464                              <1> m_pix_op_or_16_0:
  8465 0000F018 66AD                <1> 	lodsw
  8466 0000F01A 663B05[4E100300]    <1> 	cmp	ax, [maskcolor]
  8467 0000F021 740A                <1> 	je	short m_pix_op_or_16_1 ; exclude
  8468 0000F023 660917              <1> 	or	[edi], dx
  8469 0000F026 8305[1C010300]02    <1> 	add	dword [u.r0], 2 ; +2
  8470                              <1> m_pix_op_or_16_1:
  8471 0000F02D 83C702              <1> 	add	edi, 2 ; +2
  8472 0000F030 E2E6                <1> 	loop	m_pix_op_or_16_0
  8473 0000F032 C3                  <1> 	retn
  8474                              <1> m_pix_op_or_3:
  8475                              <1> 	; 32 bit true colors
  8476                              <1> 	;jmp	short m_pix_op_or_32
  8477                              <1> m_pix_op_or_32:
  8478                              <1> 	; 32 bit true colors
  8479 0000F033 89C2                <1> 	mov	edx, eax ; new color
  8480                              <1> m_pix_op_or_32_0:
  8481 0000F035 AD                  <1> 	lodsd 
  8482 0000F036 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8483 0000F03C 7409                <1> 	je	short m_pix_op_or_32_1 ; exclude
  8484 0000F03E 0917                <1> 	or	[edi], edx ; 25/02/2021	
  8485 0000F040 8305[1C010300]04    <1> 	add	dword [u.r0], 4 ; +4
  8486                              <1> m_pix_op_or_32_1:
  8487 0000F047 83C704              <1> 	add	edi, 4 ; +4
  8488 0000F04A E2E9                <1> 	loop	m_pix_op_or_32_0
  8489 0000F04C C3                  <1> 	retn
  8490                              <1> 
  8491                              <1> m_pix_op_or_w:
  8492                              <1> 	; 06/02/2021
  8493                              <1> 	; MIX COLOR (MASKED, window)
  8494                              <1> 	;
  8495                              <1> 	; jump from pix_op_or_w
  8496                              <1> 	;
  8497                              <1> 	; INPUT:
  8498                              <1> 	;   ecx = bytes per row (to be applied)
  8499                              <1> 	;   edx = screen width in bytes
  8500                              <1> 	;   ebx = row count
  8501                              <1> 	;   eax = color
  8502                              <1> 	;
  8503                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8504                              <1> 	;
  8505                              <1> 	; OUTPUT:
  8506                              <1> 	; 	[u.r0] will be > 0 if succesful
  8507                              <1> 
  8508                              <1> 	; window
  8509                              <1> 	;mov	edi, [v_str] ; LFB start address
  8510                              <1> 	;mov	esi, edi 
  8511                              <1> 
  8512 0000F04D 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8513 0000F054 7707                <1> 	ja	short m_pix_op_or_w_1
  8514                              <1> 
  8515                              <1> 	; 256 colors (8bpp)
  8516 0000F056 BD[C9EF0000]        <1> 	mov	ebp, m_pix_op_or_8
  8517 0000F05B EB1E                <1> 	jmp	short m_pix_op_or_w_4
  8518                              <1> 			
  8519                              <1> m_pix_op_or_w_1:
  8520 0000F05D 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8521 0000F064 7710                <1> 	ja	short m_pix_op_or_w_3 ; 32bpp
  8522 0000F066 7207                <1> 	jb	short m_pix_op_or_w_2 ; 16bpp
  8523                              <1> 
  8524                              <1> 	; 24 bit true colors
  8525 0000F068 BD[EBEF0000]        <1> 	mov	ebp, m_pix_op_or_24
  8526 0000F06D EB0C                <1> 	jmp	short m_pix_op_or_w_4
  8527                              <1> 
  8528                              <1> 	; 65536 colors (16bpp)
  8529                              <1> m_pix_op_or_w_2:
  8530 0000F06F BD[16F00000]        <1> 	mov	ebp, m_pix_op_or_16
  8531 0000F074 EB05                <1> 	jmp	short m_pix_op_or_w_4
  8532                              <1> 
  8533                              <1> 	; 32 bit true colors
  8534                              <1> m_pix_op_or_w_3:
  8535 0000F076 BD[33F00000]        <1> 	mov	ebp, m_pix_op_or_32
  8536                              <1> m_pix_op_or_w_4:
  8537 0000F07B E9D7FBFFFF          <1> 	jmp	m_pix_op_orc_w_x
  8538                              <1> 
  8539                              <1> m_pix_op_xor:
  8540                              <1> 	; 06/02/2021
  8541                              <1> 	; XOR COLOR (MASKED, full screen)
  8542                              <1> 	;
  8543                              <1> 	; jump from pix_op_xor
  8544                              <1> 	;
  8545                              <1> 	; INPUT:
  8546                              <1> 	;   eax = color (AL, AX, EAX)
  8547                              <1> 	;   ecx = [v_siz] ; display page pixel count
  8548                              <1> 	;   esi = edi = [v_mem] ; LFB start address
  8549                              <1> 	;
  8550                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8551                              <1> 	;
  8552                              <1> 	; OUTPUT:
  8553                              <1> 	; 	[u.r0] will be > 0 if succesful
  8554                              <1> 	
  8555                              <1> 	; Full screen
  8556                              <1> m_pix_op_xor_0:
  8557 0000F080 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8558 0000F087 7717                <1> 	ja	short m_pix_op_xor_1
  8559                              <1> 	; 256 colors (8bpp)
  8560                              <1> 	;jmp	short m_pix_op_xor_8
  8561                              <1> m_pix_op_xor_8:
  8562                              <1> 	; 8 bit colors (256 colors)
  8563 0000F089 88C2                <1> 	mov	dl, al ; new color
  8564                              <1> m_pix_op_xor_8_0:
  8565 0000F08B AC                  <1> 	lodsb 
  8566 0000F08C 3A05[4E100300]      <1> 	cmp	al, [maskcolor]
  8567 0000F092 7408                <1> 	je	short m_pix_op_xor_8_1 ; exclude
  8568 0000F094 3017                <1> 	xor	[edi], dl
  8569 0000F096 FF05[1C010300]      <1> 	inc	dword [u.r0] ; +1
  8570                              <1> m_pix_op_xor_8_1:
  8571 0000F09C 47                  <1> 	inc	edi
  8572 0000F09D E2EC                <1> 	loop	m_pix_op_xor_8_0
  8573 0000F09F C3                  <1> 	retn
  8574                              <1> m_pix_op_xor_1:
  8575 0000F0A0 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8576 0000F0A7 774A                <1> 	ja	short m_pix_op_xor_3 ; 32bpp	
  8577 0000F0A9 722B                <1> 	jb	short m_pix_op_xor_2 ; 16bpp
  8578                              <1> 	; 24 bit true colors
  8579                              <1> 	;jmp	short m_pix_op_xor_24
  8580                              <1> m_pix_op_xor_24:
  8581                              <1> 	; 24 bit true colors
  8582 0000F0AB 89C2                <1> 	mov	edx, eax ; new color
  8583                              <1> 	;and	edx, 0FFFFFFh
  8584                              <1> m_pix_op_xor_24_0:
  8585 0000F0AD 66AD                <1> 	lodsw
  8586 0000F0AF C1E010              <1> 	shl	eax, 16
  8587 0000F0B2 AC                  <1> 	lodsb
  8588 0000F0B3 C1C010              <1> 	rol	eax, 16	
  8589 0000F0B6 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8590 0000F0BC 7412                <1> 	je	short m_pix_op_xor_24_1 ; exclude
  8591 0000F0BE 31D0                <1> 	xor	eax, edx
  8592 0000F0C0 668907              <1> 	mov	[edi], ax
  8593 0000F0C3 C1E810              <1> 	shr	eax, 16
  8594 0000F0C6 884702              <1> 	mov	[edi+2], al
  8595 0000F0C9 8305[1C010300]03    <1> 	add	dword [u.r0], 3 ; +3
  8596                              <1> m_pix_op_xor_24_1:
  8597 0000F0D0 83C703              <1> 	add	edi, 3 ; +3
  8598 0000F0D3 E2D8                <1> 	loop	m_pix_op_xor_24_0
  8599 0000F0D5 C3                  <1> 	retn
  8600                              <1> 	; 65536 colors (16bpp)
  8601                              <1> m_pix_op_xor_2:
  8602                              <1> 	;jmp	short m_pix_op_xor_16
  8603                              <1> m_pix_op_xor_16:
  8604                              <1> 	; 16 bit colors (65536 colors)
  8605 0000F0D6 89C2                <1> 	mov	edx, eax ; new color
  8606                              <1> 	;and	edx, 0FFFFh
  8607                              <1> m_pix_op_xor_16_0:
  8608 0000F0D8 66AD                <1> 	lodsw
  8609 0000F0DA 663B05[4E100300]    <1> 	cmp	ax, [maskcolor]
  8610 0000F0E1 740A                <1> 	je	short m_pix_op_xor_16_1 ; exclude
  8611 0000F0E3 663117              <1> 	xor	[edi], dx
  8612 0000F0E6 8305[1C010300]02    <1> 	add	dword [u.r0], 2 ; +2
  8613                              <1> m_pix_op_xor_16_1:
  8614 0000F0ED 83C702              <1> 	add	edi, 2 ; +2
  8615 0000F0F0 E2E6                <1> 	loop	m_pix_op_xor_16_0
  8616 0000F0F2 C3                  <1> 	retn
  8617                              <1> m_pix_op_xor_3:
  8618                              <1> 	; 32 bit true colors
  8619                              <1> 	;jmp	short m_pix_op_xor_32
  8620                              <1> m_pix_op_xor_32:
  8621                              <1> 	; 32 bit true colors
  8622 0000F0F3 89C2                <1> 	mov	edx, eax ; new color
  8623                              <1> m_pix_op_xor_32_0:
  8624 0000F0F5 AD                  <1> 	lodsd 
  8625 0000F0F6 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8626 0000F0FC 7409                <1> 	je	short m_pix_op_xor_32_1 ; exclude
  8627 0000F0FE 3117                <1> 	xor	[edi], edx ; 25/02/2021	
  8628 0000F100 8305[1C010300]04    <1> 	add	dword [u.r0], 4 ; +4
  8629                              <1> m_pix_op_xor_32_1:
  8630 0000F107 83C704              <1> 	add	edi, 4 ; +4
  8631 0000F10A E2E9                <1> 	loop	m_pix_op_xor_32_0
  8632 0000F10C C3                  <1> 	retn
  8633                              <1> 
  8634                              <1> m_pix_op_xor_w:
  8635                              <1> 	; 06/02/2021
  8636                              <1> 	; XOR COLOR (MASKED, window)
  8637                              <1> 	;
  8638                              <1> 	; jump from pix_op_xor_w
  8639                              <1> 	;
  8640                              <1> 	; INPUT:
  8641                              <1> 	;   ecx = bytes per row (to be applied)
  8642                              <1> 	;   edx = screen width in bytes
  8643                              <1> 	;   ebx = row count
  8644                              <1> 	;   eax = color
  8645                              <1> 	;
  8646                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8647                              <1> 	;
  8648                              <1> 	; OUTPUT:
  8649                              <1> 	; 	[u.r0] will be > 0 if succesful
  8650                              <1> 
  8651                              <1> 	; window
  8652                              <1> 	;mov	edi, [v_str] ; LFB start address
  8653                              <1> 	;mov	esi, edi 
  8654                              <1> 
  8655 0000F10D 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8656 0000F114 7707                <1> 	ja	short m_pix_op_xor_w_1
  8657                              <1> 
  8658                              <1> 	; 256 colors (8bpp)
  8659 0000F116 BD[89F00000]        <1> 	mov	ebp, m_pix_op_xor_8
  8660 0000F11B EB1E                <1> 	jmp	short m_pix_op_xor_w_4
  8661                              <1> 			
  8662                              <1> m_pix_op_xor_w_1:
  8663 0000F11D 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8664 0000F124 7710                <1> 	ja	short m_pix_op_xor_w_3 ; 32bpp
  8665 0000F126 7207                <1> 	jb	short m_pix_op_xor_w_2 ; 16bpp
  8666                              <1> 
  8667                              <1> 	; 24 bit true colors
  8668 0000F128 BD[ABF00000]        <1> 	mov	ebp, m_pix_op_xor_24
  8669 0000F12D EB0C                <1> 	jmp	short m_pix_op_xor_w_4
  8670                              <1> 
  8671                              <1> 	; 65536 colors (16bpp)
  8672                              <1> m_pix_op_xor_w_2:
  8673 0000F12F BD[D6F00000]        <1> 	mov	ebp, m_pix_op_xor_16
  8674 0000F134 EB05                <1> 	jmp	short m_pix_op_xor_w_4
  8675                              <1> 
  8676                              <1> 	; 32 bit true colors
  8677                              <1> m_pix_op_xor_w_3:
  8678 0000F136 BD[F3F00000]        <1> 	mov	ebp, m_pix_op_xor_32
  8679                              <1> m_pix_op_xor_w_4:
  8680 0000F13B E917FBFFFF          <1> 	jmp	m_pix_op_xor_w_x
  8681                              <1> 
  8682                              <1> m_pix_op_not:
  8683                              <1> 	; 06/02/2021
  8684                              <1> 	; NOT COLOR (MASKED, full screen)
  8685                              <1> 	;
  8686                              <1> 	; jump from pix_op_not
  8687                              <1> 	;
  8688                              <1> 	; INPUT:
  8689                              <1> 	;   ecx = [v_siz] ; display page pixel count
  8690                              <1> 	;   esi = edi = [v_mem] ; LFB start address
  8691                              <1> 	;
  8692                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8693                              <1> 	;
  8694                              <1> 	; OUTPUT:
  8695                              <1> 	; 	[u.r0] will be > 0 if succesful
  8696                              <1> 	
  8697                              <1> 	; Full screen
  8698                              <1> m_pix_op_not_0:
  8699 0000F140 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8700 0000F147 7715                <1> 	ja	short m_pix_op_not_1
  8701                              <1> 	; 256 colors (8bpp)
  8702                              <1> 	;jmp	short m_pix_op_not_8
  8703                              <1> m_pix_op_not_8:
  8704                              <1> 	; 8 bit colors (256 colors)
  8705 0000F149 AC                  <1> 	lodsb 
  8706 0000F14A 3A05[4E100300]      <1> 	cmp	al, [maskcolor]
  8707 0000F150 7408                <1> 	je	short m_pix_op_not_8_1 ; exclude
  8708 0000F152 F617                <1> 	not	byte [edi]
  8709 0000F154 FF05[1C010300]      <1> 	inc	dword [u.r0] ; +1
  8710                              <1> m_pix_op_not_8_1:
  8711 0000F15A 47                  <1> 	inc	edi
  8712 0000F15B E2EC                <1> 	loop	m_pix_op_not_8
  8713 0000F15D C3                  <1> 	retn
  8714                              <1> m_pix_op_not_1:
  8715 0000F15E 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8716 0000F165 7746                <1> 	ja	short m_pix_op_not_3 ; 32bpp	
  8717 0000F167 7229                <1> 	jb	short m_pix_op_not_2 ; 16bpp
  8718                              <1> 	; 24 bit true colors
  8719                              <1> 	;jmp	short m_pix_op_not_24
  8720                              <1> m_pix_op_not_24:
  8721                              <1> 	; 24 bit true colors
  8722 0000F169 66AD                <1> 	lodsw
  8723 0000F16B C1E010              <1> 	shl	eax, 16
  8724 0000F16E AC                  <1> 	lodsb
  8725 0000F16F C1C010              <1> 	rol	eax, 16	
  8726 0000F172 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8727 0000F178 7412                <1> 	je	short m_pix_op_not_24_1 ; exclude
  8728 0000F17A F7D0                <1> 	not	eax
  8729 0000F17C 668907              <1> 	mov	[edi], ax
  8730 0000F17F C1E810              <1> 	shr	eax, 16
  8731 0000F182 884702              <1> 	mov	[edi+2], al
  8732 0000F185 8305[1C010300]03    <1> 	add	dword [u.r0], 3 ; +3
  8733                              <1> m_pix_op_not_24_1:
  8734 0000F18C 83C703              <1> 	add	edi, 3 ; +3
  8735 0000F18F E2D8                <1> 	loop	m_pix_op_not_24
  8736 0000F191 C3                  <1> 	retn
  8737                              <1> 	; 65536 colors (16bpp)
  8738                              <1> m_pix_op_not_2:
  8739                              <1> 	;jmp	short m_pix_op_not_16
  8740                              <1> m_pix_op_not_16:
  8741                              <1> 	; 16 bit colors (65536 colors)
  8742 0000F192 66AD                <1> 	lodsw
  8743 0000F194 663B05[4E100300]    <1> 	cmp	ax, [maskcolor]
  8744 0000F19B 740A                <1> 	je	short m_pix_op_not_16_1 ; exclude
  8745 0000F19D 66F717              <1> 	not	word [edi]
  8746 0000F1A0 8305[1C010300]02    <1> 	add	dword [u.r0], 2 ; +2
  8747                              <1> m_pix_op_not_16_1:
  8748 0000F1A7 83C702              <1> 	add	edi, 2 ; +2
  8749 0000F1AA E2E6                <1> 	loop	m_pix_op_not_16
  8750 0000F1AC C3                  <1> 	retn
  8751                              <1> m_pix_op_not_3:
  8752                              <1> 	; 32 bit true colors
  8753                              <1> 	;jmp	short m_pix_op_not_32
  8754                              <1> m_pix_op_not_32:
  8755                              <1> 	; 32 bit true colors
  8756 0000F1AD AD                  <1> 	lodsd 
  8757 0000F1AE 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8758 0000F1B4 7409                <1> 	je	short m_pix_op_not_32_1 ; exclude
  8759 0000F1B6 F717                <1> 	not	dword [edi]	
  8760 0000F1B8 8305[1C010300]04    <1> 	add	dword [u.r0], 4 ; +4
  8761                              <1> m_pix_op_not_32_1:
  8762 0000F1BF 83C704              <1> 	add	edi, 4 ; +4
  8763 0000F1C2 E2E9                <1> 	loop	m_pix_op_not_32
  8764 0000F1C4 C3                  <1> 	retn
  8765                              <1> 
  8766                              <1> m_pix_op_not_w:
  8767                              <1> 	; 06/02/2021
  8768                              <1> 	; NOT COLOR (MASKED, window)
  8769                              <1> 	;
  8770                              <1> 	; jump from pix_op_not_w
  8771                              <1> 	;
  8772                              <1> 	; INPUT:
  8773                              <1> 	;   ecx = bytes per row (to be applied)
  8774                              <1> 	;   edx = screen width in bytes
  8775                              <1> 	;   ebx = row count
  8776                              <1> 	;
  8777                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8778                              <1> 	;
  8779                              <1> 	; OUTPUT:
  8780                              <1> 	; 	[u.r0] will be > 0 if succesful
  8781                              <1> 
  8782                              <1> 	; window
  8783                              <1> 	;mov	edi, [v_str] ; LFB start address
  8784                              <1> 	;mov	esi, edi 
  8785                              <1> 
  8786 0000F1C5 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8787 0000F1CC 7707                <1> 	ja	short m_pix_op_not_w_1
  8788                              <1> 
  8789                              <1> 	; 256 colors (8bpp)
  8790 0000F1CE BD[49F10000]        <1> 	mov	ebp, m_pix_op_not_8
  8791 0000F1D3 EB1E                <1> 	jmp	short m_pix_op_not_w_4
  8792                              <1> 			
  8793                              <1> m_pix_op_not_w_1:
  8794 0000F1D5 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8795 0000F1DC 7710                <1> 	ja	short m_pix_op_not_w_3 ; 32bpp
  8796 0000F1DE 7207                <1> 	jb	short m_pix_op_not_w_2 ; 16bpp
  8797                              <1> 
  8798                              <1> 	; 24 bit true colors
  8799 0000F1E0 BD[69F10000]        <1> 	mov	ebp, m_pix_op_not_24
  8800 0000F1E5 EB0C                <1> 	jmp	short m_pix_op_not_w_4
  8801                              <1> 
  8802                              <1> 	; 65536 colors (16bpp)
  8803                              <1> m_pix_op_not_w_2:
  8804 0000F1E7 BD[92F10000]        <1> 	mov	ebp, m_pix_op_not_16
  8805 0000F1EC EB05                <1> 	jmp	short m_pix_op_not_w_4
  8806                              <1> 
  8807                              <1> 	; 32 bit true colors
  8808                              <1> m_pix_op_not_w_3:
  8809 0000F1EE BD[ADF10000]        <1> 	mov	ebp, m_pix_op_not_32
  8810                              <1> m_pix_op_not_w_4:
  8811 0000F1F3 E95FFAFFFF          <1> 	jmp	m_pix_op_not_w_x
  8812                              <1> 
  8813                              <1> m_pix_op_neg:
  8814                              <1> 	; 06/02/2021
  8815                              <1> 	; NEGATIVE COLOR (MASKED, full screen)
  8816                              <1> 	;
  8817                              <1> 	; jump from pix_op_neg
  8818                              <1> 	;
  8819                              <1> 	; INPUT:
  8820                              <1> 	;   ecx = [v_siz] ; display page pixel count
  8821                              <1> 	;   esi = edi = [v_mem] ; LFB start address
  8822                              <1> 	;
  8823                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8824                              <1> 	;
  8825                              <1> 	; OUTPUT:
  8826                              <1> 	; 	[u.r0] will be > 0 if succesful
  8827                              <1> 	
  8828                              <1> 	; Full screen
  8829                              <1> m_pix_op_neg_0:
  8830 0000F1F8 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8831 0000F1FF 7715                <1> 	ja	short m_pix_op_neg_1
  8832                              <1> 	; 256 colors (8bpp)
  8833                              <1> 	;jmp	short m_pix_op_neg_8
  8834                              <1> m_pix_op_neg_8:
  8835                              <1> 	; 8 bit colors (256 colors)
  8836 0000F201 AC                  <1> 	lodsb 
  8837 0000F202 3A05[4E100300]      <1> 	cmp	al, [maskcolor]
  8838 0000F208 7408                <1> 	je	short m_pix_op_neg_8_1 ; exclude
  8839 0000F20A F61F                <1> 	neg	byte [edi]
  8840 0000F20C FF05[1C010300]      <1> 	inc	dword [u.r0] ; +1
  8841                              <1> m_pix_op_neg_8_1:
  8842 0000F212 47                  <1> 	inc	edi
  8843 0000F213 E2EC                <1> 	loop	m_pix_op_neg_8
  8844 0000F215 C3                  <1> 	retn
  8845                              <1> m_pix_op_neg_1:
  8846 0000F216 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8847 0000F21D 7746                <1> 	ja	short m_pix_op_neg_3 ; 32bpp	
  8848 0000F21F 7229                <1> 	jb	short m_pix_op_neg_2 ; 16bpp
  8849                              <1> 	; 24 bit true colors
  8850                              <1> 	;jmp	short m_pix_op_neg_24
  8851                              <1> m_pix_op_neg_24:
  8852                              <1> 	; 24 bit true colors
  8853 0000F221 66AD                <1> 	lodsw
  8854 0000F223 C1E010              <1> 	shl	eax, 16
  8855 0000F226 AC                  <1> 	lodsb
  8856 0000F227 C1C010              <1> 	rol	eax, 16	
  8857 0000F22A 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8858 0000F230 7412                <1> 	je	short m_pix_op_neg_24_1 ; exclude
  8859 0000F232 F7D8                <1> 	neg	eax
  8860 0000F234 668907              <1> 	mov	[edi], ax
  8861 0000F237 C1E810              <1> 	shr	eax, 16
  8862 0000F23A 884702              <1> 	mov	[edi+2], al
  8863 0000F23D 8305[1C010300]03    <1> 	add	dword [u.r0], 3 ; +3
  8864                              <1> m_pix_op_neg_24_1:
  8865 0000F244 83C703              <1> 	add	edi, 3 ; +3
  8866 0000F247 E2D8                <1> 	loop	m_pix_op_neg_24
  8867 0000F249 C3                  <1> 	retn
  8868                              <1> 	; 65536 colors (16bpp)
  8869                              <1> m_pix_op_neg_2:
  8870                              <1> 	;jmp	short m_pix_op_neg_16
  8871                              <1> m_pix_op_neg_16:
  8872                              <1> 	; 16 bit colors (65536 colors)
  8873 0000F24A 66AD                <1> 	lodsw
  8874 0000F24C 663B05[4E100300]    <1> 	cmp	ax, [maskcolor]
  8875 0000F253 740A                <1> 	je	short m_pix_op_neg_16_1 ; exclude
  8876 0000F255 66F71F              <1> 	neg	word [edi]
  8877 0000F258 8305[1C010300]02    <1> 	add	dword [u.r0], 2 ; +2
  8878                              <1> m_pix_op_neg_16_1:
  8879 0000F25F 83C702              <1> 	add	edi, 2 ; +2
  8880 0000F262 E2E6                <1> 	loop	m_pix_op_neg_16
  8881 0000F264 C3                  <1> 	retn
  8882                              <1> m_pix_op_neg_3:
  8883                              <1> 	; 32 bit true colors
  8884                              <1> 	;jmp	short m_pix_op_neg_32
  8885                              <1> m_pix_op_neg_32:
  8886                              <1> 	; 32 bit true colors
  8887 0000F265 AD                  <1> 	lodsd 
  8888 0000F266 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8889 0000F26C 7409                <1> 	je	short m_pix_op_neg_32_1 ; exclude
  8890 0000F26E F71F                <1> 	neg	dword [edi]	
  8891 0000F270 8305[1C010300]04    <1> 	add	dword [u.r0], 4 ; +4
  8892                              <1> m_pix_op_neg_32_1:
  8893 0000F277 83C704              <1> 	add	edi, 4 ; +4
  8894 0000F27A E2E9                <1> 	loop	m_pix_op_neg_32
  8895 0000F27C C3                  <1> 	retn
  8896                              <1> 
  8897                              <1> m_pix_op_neg_w:
  8898                              <1> 	; 06/02/2021
  8899                              <1> 	; NEGATIVE COLOR (MASKED, window)
  8900                              <1> 	;
  8901                              <1> 	; jump from pix_op_neg_w
  8902                              <1> 	;
  8903                              <1> 	; INPUT:
  8904                              <1> 	;   ecx = bytes per row (to be applied)
  8905                              <1> 	;   edx = screen width in bytes
  8906                              <1> 	;   ebx = row count
  8907                              <1> 	;
  8908                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8909                              <1> 	;
  8910                              <1> 	; OUTPUT:
  8911                              <1> 	; 	[u.r0] will be > 0 if succesful
  8912                              <1> 
  8913                              <1> 	; window
  8914                              <1> 	;mov	edi, [v_str] ; LFB start address
  8915                              <1> 	;mov	esi, edi 
  8916                              <1> 
  8917 0000F27D 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8918 0000F284 7707                <1> 	ja	short m_pix_op_neg_w_1
  8919                              <1> 
  8920                              <1> 	; 256 colors (8bpp)
  8921 0000F286 BD[01F20000]        <1> 	mov	ebp, m_pix_op_neg_8
  8922 0000F28B EB1E                <1> 	jmp	short m_pix_op_neg_w_4
  8923                              <1> 			
  8924                              <1> m_pix_op_neg_w_1:
  8925 0000F28D 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8926 0000F294 7710                <1> 	ja	short m_pix_op_neg_w_3 ; 32bpp
  8927 0000F296 7207                <1> 	jb	short m_pix_op_neg_w_2 ; 16bpp
  8928                              <1> 
  8929                              <1> 	; 24 bit true colors
  8930 0000F298 BD[21F20000]        <1> 	mov	ebp, m_pix_op_neg_24
  8931 0000F29D EB0C                <1> 	jmp	short m_pix_op_neg_w_4
  8932                              <1> 
  8933                              <1> 	; 65536 colors (16bpp)
  8934                              <1> m_pix_op_neg_w_2:
  8935 0000F29F BD[4AF20000]        <1> 	mov	ebp, m_pix_op_neg_16
  8936 0000F2A4 EB05                <1> 	jmp	short m_pix_op_neg_w_4
  8937                              <1> 
  8938                              <1> 	; 32 bit true colors
  8939                              <1> m_pix_op_neg_w_3:
  8940 0000F2A6 BD[65F20000]        <1> 	mov	ebp, m_pix_op_neg_32
  8941                              <1> m_pix_op_neg_w_4:
  8942 0000F2AB E9A7F9FFFF          <1> 	jmp	m_pix_op_neg_w_x
  8943                              <1> 
  8944                              <1> m_pix_op_inc:
  8945                              <1> 	; 06/02/2021
  8946                              <1> 	; INCREASE COLOR (MASKED, full screen)
  8947                              <1> 	;
  8948                              <1> 	; jump from pix_op_inc
  8949                              <1> 	;
  8950                              <1> 	; INPUT:
  8951                              <1> 	;   ecx = [v_siz] ; display page pixel count
  8952                              <1> 	;   esi = edi = [v_mem] ; LFB start address
  8953                              <1> 	;
  8954                              <1> 	;   [maskcolor] = mask color (to be excluded)
  8955                              <1> 	;
  8956                              <1> 	; OUTPUT:
  8957                              <1> 	; 	[u.r0] will be > 0 if succesful
  8958                              <1> 	
  8959                              <1> 	; Full screen
  8960                              <1> m_pix_op_inc_0:
  8961 0000F2B0 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  8962 0000F2B7 7719                <1> 	ja	short m_pix_op_inc_1
  8963                              <1> 	; 256 colors (8bpp)
  8964                              <1> 	;jmp	short m_pix_op_inc_8
  8965                              <1> m_pix_op_inc_8:
  8966                              <1> 	; 8 bit colors (256 colors)
  8967 0000F2B9 AC                  <1> 	lodsb 
  8968 0000F2BA 3A05[4E100300]      <1> 	cmp	al, [maskcolor]
  8969 0000F2C0 740C                <1> 	je	short m_pix_op_inc_8_1 ; exclude
  8970 0000F2C2 FE07                <1> 	inc	byte [edi]
  8971 0000F2C4 7502                <1> 	jnz	short m_pix_op_inc_8_0
  8972 0000F2C6 FE0F                <1> 	dec	byte [edi]
  8973                              <1> m_pix_op_inc_8_0:
  8974 0000F2C8 FF05[1C010300]      <1> 	inc	dword [u.r0] ; +1
  8975                              <1> m_pix_op_inc_8_1:
  8976 0000F2CE 47                  <1> 	inc	edi
  8977 0000F2CF E2E8                <1> 	loop	m_pix_op_inc_8
  8978 0000F2D1 C3                  <1> 	retn
  8979                              <1> m_pix_op_inc_1:
  8980 0000F2D2 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  8981 0000F2D9 7752                <1> 	ja	short m_pix_op_inc_3 ; 32bpp	
  8982 0000F2DB 7230                <1> 	jb	short m_pix_op_inc_2 ; 16bpp
  8983                              <1> 	; 24 bit true colors
  8984                              <1> 	;jmp	short m_pix_op_inc_24
  8985                              <1> m_pix_op_inc_24:
  8986                              <1> 	; 24 bit true colors
  8987 0000F2DD 66AD                <1> 	lodsw
  8988 0000F2DF C1E010              <1> 	shl	eax, 16
  8989 0000F2E2 AC                  <1> 	lodsb
  8990 0000F2E3 C1C010              <1> 	rol	eax, 16	
  8991 0000F2E6 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  8992 0000F2EC 7419                <1> 	je	short m_pix_op_inc_24_1 ; exclude
  8993 0000F2EE 40                  <1> 	inc	eax
  8994 0000F2EF 3DFFFFFF00          <1> 	cmp	eax, 0FFFFFFh
  8995 0000F2F4 7601                <1> 	jna	short m_pix_op_inc_24_0
  8996 0000F2F6 48                  <1> 	dec	eax 
  8997                              <1> m_pix_op_inc_24_0:
  8998 0000F2F7 668907              <1> 	mov	[edi], ax
  8999 0000F2FA C1E810              <1> 	shr	eax, 16
  9000 0000F2FD 884702              <1> 	mov	[edi+2], al
  9001 0000F300 8305[1C010300]03    <1> 	add	dword [u.r0], 3 ; +3
  9002                              <1> m_pix_op_inc_24_1:
  9003 0000F307 83C703              <1> 	add	edi, 3 ; +3
  9004 0000F30A E2D1                <1> 	loop	m_pix_op_inc_24
  9005 0000F30C C3                  <1> 	retn
  9006                              <1> 	; 65536 colors (16bpp)
  9007                              <1> m_pix_op_inc_2:
  9008                              <1> 	;jmp	short m_pix_op_inc_16
  9009                              <1> m_pix_op_inc_16:
  9010                              <1> 	; 16 bit colors (65536 colors)
  9011 0000F30D 66AD                <1> 	lodsw
  9012 0000F30F 663B05[4E100300]    <1> 	cmp	ax, [maskcolor]
  9013 0000F316 740F                <1> 	je	short m_pix_op_inc_16_1 ; exclude
  9014 0000F318 66FF07              <1> 	inc	word [edi]
  9015 0000F31B 7503                <1> 	jnz	short m_pix_op_inc_16_0
  9016 0000F31D 66FF0F              <1> 	dec	word [edi]
  9017                              <1> m_pix_op_inc_16_0:
  9018 0000F320 8305[1C010300]02    <1> 	add	dword [u.r0], 2 ; +2
  9019                              <1> m_pix_op_inc_16_1:
  9020 0000F327 83C702              <1> 	add	edi, 2 ; +2
  9021 0000F32A E2E1                <1> 	loop	m_pix_op_inc_16
  9022 0000F32C C3                  <1> 	retn
  9023                              <1> m_pix_op_inc_3:
  9024                              <1> 	; 32 bit true colors
  9025                              <1> 	;jmp	short m_pix_op_inc_32
  9026                              <1> m_pix_op_inc_32:
  9027                              <1> 	; 32 bit true colors
  9028 0000F32D AD                  <1> 	lodsd 
  9029 0000F32E 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  9030 0000F334 740D                <1> 	je	short m_pix_op_inc_32_1 ; exclude
  9031 0000F336 FF07                <1> 	inc	dword [edi]
  9032 0000F338 7502                <1> 	jnz	short m_pix_op_inc_32_0
  9033 0000F33A FF0F                <1> 	dec	dword [edi]
  9034                              <1> m_pix_op_inc_32_0:	
  9035 0000F33C 8305[1C010300]04    <1> 	add	dword [u.r0], 4 ; +4
  9036                              <1> m_pix_op_inc_32_1:
  9037 0000F343 83C704              <1> 	add	edi, 4 ; +4
  9038 0000F346 E2E5                <1> 	loop	m_pix_op_inc_32
  9039 0000F348 C3                  <1> 	retn
  9040                              <1> 
  9041                              <1> m_pix_op_inc_w:
  9042                              <1> 	; 06/02/2021
  9043                              <1> 	; INCREASE COLOR (MASKED, window)
  9044                              <1> 	;
  9045                              <1> 	; jump from pix_op_inc_w
  9046                              <1> 	;
  9047                              <1> 	; INPUT:
  9048                              <1> 	;   ecx = bytes per row (to be applied)
  9049                              <1> 	;   edx = screen width in bytes
  9050                              <1> 	;   ebx = row count
  9051                              <1> 	;
  9052                              <1> 	;   [maskcolor] = mask color (to be excluded)
  9053                              <1> 	;
  9054                              <1> 	; OUTPUT:
  9055                              <1> 	; 	[u.r0] will be > 0 if succesful
  9056                              <1> 
  9057                              <1> 	; window
  9058                              <1> 	;mov	edi, [v_str] ; LFB start address
  9059                              <1> 	;mov	esi, edi 
  9060                              <1> 
  9061 0000F349 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  9062 0000F350 7707                <1> 	ja	short m_pix_op_inc_w_1
  9063                              <1> 
  9064                              <1> 	; 256 colors (8bpp)
  9065 0000F352 BD[B9F20000]        <1> 	mov	ebp, m_pix_op_inc_8
  9066 0000F357 EB1E                <1> 	jmp	short m_pix_op_inc_w_4
  9067                              <1> 			
  9068                              <1> m_pix_op_inc_w_1:
  9069 0000F359 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  9070 0000F360 7710                <1> 	ja	short m_pix_op_inc_w_3 ; 32bpp
  9071 0000F362 7207                <1> 	jb	short m_pix_op_inc_w_2 ; 16bpp
  9072                              <1> 
  9073                              <1> 	; 24 bit true colors
  9074 0000F364 BD[DDF20000]        <1> 	mov	ebp, m_pix_op_inc_24
  9075 0000F369 EB0C                <1> 	jmp	short m_pix_op_inc_w_4
  9076                              <1> 
  9077                              <1> 	; 65536 colors (16bpp)
  9078                              <1> m_pix_op_inc_w_2:
  9079 0000F36B BD[0DF30000]        <1> 	mov	ebp, m_pix_op_inc_16
  9080 0000F370 EB05                <1> 	jmp	short m_pix_op_inc_w_4
  9081                              <1> 
  9082                              <1> 	; 32 bit true colors
  9083                              <1> m_pix_op_inc_w_3:
  9084 0000F372 BD[2DF30000]        <1> 	mov	ebp, m_pix_op_inc_32
  9085                              <1> m_pix_op_inc_w_4:
  9086 0000F377 E9DBF8FFFF          <1> 	jmp	m_pix_op_inc_w_x
  9087                              <1> 
  9088                              <1> m_pix_op_dec:
  9089                              <1> 	; 06/02/2021
  9090                              <1> 	; DECREASE COLOR (MASKED, full screen)
  9091                              <1> 	;
  9092                              <1> 	; jump from pix_op_dec
  9093                              <1> 	;
  9094                              <1> 	; INPUT:
  9095                              <1> 	;   ecx = [v_siz] ; display page pixel count
  9096                              <1> 	;   esi = edi = [v_mem] ; LFB start address
  9097                              <1> 	;
  9098                              <1> 	;   [maskcolor] = mask color (to be excluded)
  9099                              <1> 	;
  9100                              <1> 	; OUTPUT:
  9101                              <1> 	; 	[u.r0] will be > 0 if succesful
  9102                              <1> 	
  9103                              <1> 	; Full screen
  9104                              <1> m_pix_op_dec_0:
  9105 0000F37C 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  9106 0000F383 7719                <1> 	ja	short m_pix_op_dec_1
  9107                              <1> 	; 256 colors (8bpp)
  9108                              <1> 	;jmp	short m_pix_op_dec_8
  9109                              <1> m_pix_op_dec_8:
  9110                              <1> 	; 8 bit colors (256 colors)
  9111 0000F385 AC                  <1> 	lodsb 
  9112 0000F386 3A05[4E100300]      <1> 	cmp	al, [maskcolor]
  9113 0000F38C 740C                <1> 	je	short m_pix_op_dec_8_1 ; exclude
  9114 0000F38E FE0F                <1> 	dec	byte [edi]
  9115 0000F390 7902                <1> 	jns	short m_pix_op_dec_8_0
  9116 0000F392 FE07                <1> 	inc	byte [edi]
  9117                              <1> m_pix_op_dec_8_0:
  9118 0000F394 FF05[1C010300]      <1> 	inc	dword [u.r0] ; +1
  9119                              <1> m_pix_op_dec_8_1:
  9120 0000F39A 47                  <1> 	inc	edi
  9121 0000F39B E2E8                <1> 	loop	m_pix_op_dec_8
  9122 0000F39D C3                  <1> 	retn
  9123                              <1> m_pix_op_dec_1:
  9124 0000F39E 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  9125 0000F3A5 774D                <1> 	ja	short m_pix_op_dec_3 ; 32bpp	
  9126 0000F3A7 722B                <1> 	jb	short m_pix_op_dec_2 ; 16bpp
  9127                              <1> 	; 24 bit true colors
  9128                              <1> 	;jmp	short m_pix_op_dec_24
  9129                              <1> m_pix_op_dec_24:
  9130                              <1> 	; 24 bit true colors
  9131 0000F3A9 66AD                <1> 	lodsw
  9132 0000F3AB C1E010              <1> 	shl	eax, 16
  9133 0000F3AE AC                  <1> 	lodsb
  9134 0000F3AF C1C010              <1> 	rol	eax, 16	
  9135 0000F3B2 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  9136 0000F3B8 7414                <1> 	je	short m_pix_op_dec_24_1 ; exclude
  9137 0000F3BA 48                  <1> 	dec	eax
  9138 0000F3BB 7901                <1> 	jns	short m_pix_op_dec_24_0
  9139 0000F3BD 40                  <1> 	inc	eax 
  9140                              <1> m_pix_op_dec_24_0:
  9141 0000F3BE 668907              <1> 	mov	[edi], ax
  9142 0000F3C1 C1E810              <1> 	shr	eax, 16
  9143 0000F3C4 884702              <1> 	mov	[edi+2], al
  9144 0000F3C7 8305[1C010300]03    <1> 	add	dword [u.r0], 3 ; +3
  9145                              <1> m_pix_op_dec_24_1:
  9146 0000F3CE 83C703              <1> 	add	edi, 3 ; +3
  9147 0000F3D1 E2D6                <1> 	loop	m_pix_op_dec_24
  9148 0000F3D3 C3                  <1> 	retn
  9149                              <1> 	; 65536 colors (16bpp)
  9150                              <1> m_pix_op_dec_2:
  9151                              <1> 	;jmp	short m_pix_op_dec_16
  9152                              <1> m_pix_op_dec_16:
  9153                              <1> 	; 16 bit colors (65536 colors)
  9154 0000F3D4 66AD                <1> 	lodsw
  9155 0000F3D6 663B05[4E100300]    <1> 	cmp	ax, [maskcolor]
  9156 0000F3DD 740F                <1> 	je	short m_pix_op_dec_16_1 ; exclude
  9157 0000F3DF 66FF0F              <1> 	dec	word [edi]
  9158 0000F3E2 7903                <1> 	jns	short m_pix_op_dec_16_0
  9159 0000F3E4 66FF07              <1> 	inc	word [edi]
  9160                              <1> m_pix_op_dec_16_0:
  9161 0000F3E7 8305[1C010300]02    <1> 	add	dword [u.r0], 2 ; +2
  9162                              <1> m_pix_op_dec_16_1:
  9163 0000F3EE 83C702              <1> 	add	edi, 2 ; +2
  9164 0000F3F1 E2E1                <1> 	loop	m_pix_op_dec_16
  9165 0000F3F3 C3                  <1> 	retn
  9166                              <1> m_pix_op_dec_3:
  9167                              <1> 	; 32 bit true colors
  9168                              <1> 	;jmp	short m_pix_op_dec_32
  9169                              <1> m_pix_op_dec_32:
  9170                              <1> 	; 32 bit true colors
  9171 0000F3F4 AD                  <1> 	lodsd 
  9172 0000F3F5 3B05[4E100300]      <1> 	cmp	eax, [maskcolor]
  9173 0000F3FB 740D                <1> 	je	short m_pix_op_dec_32_1 ; exclude
  9174 0000F3FD FF0F                <1> 	dec	dword [edi]
  9175 0000F3FF 7902                <1> 	jns	short m_pix_op_dec_32_0
  9176 0000F401 FF07                <1> 	inc	dword [edi]
  9177                              <1> m_pix_op_dec_32_0:	
  9178 0000F403 8305[1C010300]04    <1> 	add	dword [u.r0], 4 ; +4
  9179                              <1> m_pix_op_dec_32_1:
  9180 0000F40A 83C704              <1> 	add	edi, 4 ; +4
  9181 0000F40D E2E5                <1> 	loop	m_pix_op_dec_32
  9182 0000F40F C3                  <1> 	retn
  9183                              <1> 
  9184                              <1> m_pix_op_dec_w:
  9185                              <1> 	; 06/02/2021
  9186                              <1> 	; DECREASE COLOR (MASKED, window)
  9187                              <1> 	;
  9188                              <1> 	; jump from pix_op_dec_w
  9189                              <1> 	;
  9190                              <1> 	; INPUT:
  9191                              <1> 	;   ecx = bytes per row (to be applied)
  9192                              <1> 	;   edx = screen width in bytes
  9193                              <1> 	;   ebx = row count
  9194                              <1> 	;
  9195                              <1> 	;   [maskcolor] = mask color (to be excluded)
  9196                              <1> 	;
  9197                              <1> 	; OUTPUT:
  9198                              <1> 	; 	[u.r0] will be > 0 if succesful
  9199                              <1> 
  9200                              <1> 	; window
  9201                              <1> 	;mov	edi, [v_str] ; LFB start address
  9202                              <1> 	;mov	esi, edi 
  9203                              <1> 
  9204 0000F410 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  9205 0000F417 7707                <1> 	ja	short m_pix_op_dec_w_1
  9206                              <1> 
  9207                              <1> 	; 256 colors (8bpp)
  9208 0000F419 BD[85F30000]        <1> 	mov	ebp, m_pix_op_dec_8
  9209 0000F41E EB1E                <1> 	jmp	short m_pix_op_dec_w_4
  9210                              <1> 			
  9211                              <1> m_pix_op_dec_w_1:
  9212 0000F420 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  9213 0000F427 7710                <1> 	ja	short m_pix_op_dec_w_3 ; 32bpp
  9214 0000F429 7207                <1> 	jb	short m_pix_op_dec_w_2 ; 16bpp
  9215                              <1> 
  9216                              <1> 	; 24 bit true colors
  9217 0000F42B BD[A9F30000]        <1> 	mov	ebp, m_pix_op_dec_24
  9218 0000F430 EB0C                <1> 	jmp	short m_pix_op_dec_w_4
  9219                              <1> 
  9220                              <1> 	; 65536 colors (16bpp)
  9221                              <1> m_pix_op_dec_w_2:
  9222 0000F432 BD[D4F30000]        <1> 	mov	ebp, m_pix_op_dec_16
  9223 0000F437 EB05                <1> 	jmp	short m_pix_op_dec_w_4
  9224                              <1> 
  9225                              <1> 	; 32 bit true colors
  9226                              <1> m_pix_op_dec_w_3:
  9227 0000F439 BD[F4F30000]        <1> 	mov	ebp, m_pix_op_dec_32
  9228                              <1> m_pix_op_dec_w_4:
  9229 0000F43E E914F8FFFF          <1> 	jmp	m_pix_op_dec_w_x
  9230                              <1> 
  9231                              <1> sysvideo_39:
  9232                              <1> 	; 15/02/2021
  9233                              <1> 	; 07/02/2021, 08/02/2021
  9234                              <1> 	; 03/01/2021, 04/01/2021
  9235                              <1> 	; 23/11/2020
  9236                              <1> 	; BH = 3
  9237                              <1> 	; PIXEL READ/WRITE
  9238                              <1> 	
  9239                              <1> 	; 07/02/2021
  9240                              <1> 	; 04/01/2021 (TRDOS 386 v2.0.3)
  9241 0000F443 80FB03              <1> 	cmp	bl, 3
  9242 0000F446 761A                <1> 	jna	short sysvideo_39_1
  9243                              <1> 	; 07/02/2021
  9244 0000F448 80FB06              <1> 	cmp	bl, 6
  9245 0000F44B 7705                <1> 	ja	short sysvideo_39_0
  9246 0000F44D E91A010000          <1> 	jmp	sysvideo_39_31
  9247                              <1> sysvideo_39_0:
  9248                              <1> 	; error
  9249 0000F452 B3FF                <1> 	mov	bl, 0FFh
  9250 0000F454 8B2D[18010300]      <1> 	mov	ebp, [u.usp]  ; ebp points to user's registers
  9251 0000F45A 895D10              <1> 	mov	[ebp+16], ebx ; EBX
  9252 0000F45D E90DD9FFFF          <1> 	jmp	sysret
  9253                              <1> sysvideo_39_1:
  9254 0000F462 803D[1E670000]FF    <1> 	cmp	byte [CRT_MODE], 0FFh
  9255 0000F469 7312                <1> 	jnb	short sysvideo_39_2 ; SVGA (VESA VBE) video mode
  9256                              <1> 
  9257                              <1> 	; Std VGA or CGA mode
  9258 0000F46B 81C200000A00        <1> 	add	edx, 0A0000h
  9259 0000F471 72DF                <1> 	jc	short sysvideo_39_0
  9260 0000F473 81FAFFFF0A00        <1> 	cmp	edx, 0AFFFFh
  9261 0000F479 77D7                <1> 	ja	short sysvideo_39_0
  9262 0000F47B EB1E                <1> 	jmp	short sysvideo_39_3 ; 8bpp
  9263                              <1> 
  9264                              <1> sysvideo_39_2:
  9265                              <1> 	; use current vbe (svga) video mode
  9266                              <1> 
  9267                              <1> 	; get LFB address
  9268 0000F47D A1[E00F0300]        <1> 	mov	eax, [LFB_ADDR] ; [LFB_Info+LFBINFO.LFB_addr]
  9269 0000F482 09C0                <1> 	or	eax, eax
  9270 0000F484 74CC                <1> 	jz	short sysvideo_39_0
  9271 0000F486 3B15[E40F0300]      <1> 	cmp	edx, [LFB_SIZE] 
  9272 0000F48C 73C4                <1> 	jnb	short sysvideo_39_0
  9273                              <1> 
  9274 0000F48E 01C2                <1> 	add	edx, eax
  9275                              <1> 	;jc	short sysvideo_39_0
  9276                              <1> 
  9277                              <1> 	; Pixel read/write in VESA VBE (2/3) video mode
  9278                              <1> 	; Video memory at Linear Frame Buffer base address
  9279                              <1> 
  9280 0000F490 8A3D[EC0F0300]      <1> 	mov	bh, [LFB_Info+LFBINFO.bpp]
  9281                              <1> 
  9282 0000F496 80FF08              <1> 	cmp	bh, 8 ; 8bpp
  9283 0000F499 775D                <1> 	ja	short sysvideo_39_17
  9284                              <1> 
  9285                              <1> 	; 8 bits per pixel
  9286                              <1> sysvideo_39_3:
  9287 0000F49B 80FB01              <1> 	cmp	bl, 1 ; 1 = write pixel
  9288 0000F49E 7406                <1> 	je	short sysvideo_39_5
  9289 0000F4A0 7712                <1> 	ja	short sysvideo_39_8
  9290                              <1> sysvideo_39_4:
  9291                              <1> 	; read pixel (8bpp)
  9292 0000F4A2 8A02                <1> 	mov	al, [edx]
  9293                              <1> 	;mov	[u.r0], al
  9294                              <1> 	;jmp	sysret
  9295 0000F4A4 EB04                <1> 	jmp	short sysvideo_39_7
  9296                              <1> sysvideo_39_5:
  9297                              <1> 	; write pixel (8bpp)
  9298 0000F4A6 88C8                <1> 	mov	al, cl
  9299                              <1> sysvideo_39_6:
  9300 0000F4A8 8802                <1> 	mov	[edx], al
  9301                              <1> sysvideo_39_7:
  9302 0000F4AA A2[1C010300]        <1> 	mov	[u.r0], al
  9303 0000F4AF E9BBD8FFFF          <1> 	jmp	sysret
  9304                              <1> sysvideo_39_8:
  9305 0000F4B4 80FB03              <1> 	cmp	bl, 3 ; mix
  9306 0000F4B7 7208                <1> 	jb	short sysvideo_39_9
  9307                              <1> 	; mix  pixel colors (8bpp)
  9308 0000F4B9 8A02                <1> 	mov	al, [edx]
  9309 0000F4BB 00C8                <1> 	add	al, cl
  9310 0000F4BD D0D8                <1> 	rcr	al, 1
  9311 0000F4BF EBE7                <1> 	jmp	short sysvideo_39_6
  9312                              <1> sysvideo_39_9:
  9313                              <1> 	 ; swap pixel colors (8bpp)
  9314 0000F4C1 88C8                <1> 	mov	al, cl
  9315 0000F4C3 8602                <1> 	xchg	[edx], al
  9316 0000F4C5 EBE3                <1> 	jmp	short sysvideo_39_7
  9317                              <1> 
  9318                              <1> 	; 16 bits per pixel
  9319                              <1> sysvideo_39_10:
  9320 0000F4C7 80FB01              <1> 	cmp	bl, 1 ; 1 = write pixel
  9321 0000F4CA 7406                <1> 	je	short sysvideo_39_12
  9322 0000F4CC 7714                <1> 	ja	short sysvideo_39_15
  9323                              <1> sysvideo_39_11:
  9324                              <1> 	; read pixel (16bpp)
  9325 0000F4CE 8B02                <1> 	mov	eax, [edx]
  9326                              <1> 	;mov	[u.r0], ax
  9327                              <1> 	;jmp	sysret
  9328 0000F4D0 EB05                <1> 	jmp	short sysvideo_39_14
  9329                              <1> sysvideo_39_12:
  9330                              <1> 	; write pixel (16bpp)
  9331 0000F4D2 89C8                <1> 	mov	eax, ecx
  9332                              <1> sysvideo_39_13:
  9333 0000F4D4 668902              <1> 	mov	[edx], ax
  9334                              <1> sysvideo_39_14:
  9335 0000F4D7 66A3[1C010300]      <1> 	mov	[u.r0], ax
  9336 0000F4DD E98DD8FFFF          <1> 	jmp	sysret
  9337                              <1> sysvideo_39_15:
  9338 0000F4E2 80FB03              <1> 	cmp	bl, 3 ; mix
  9339 0000F4E5 720A                <1> 	jb	short sysvideo_39_16
  9340                              <1> 	; mix  pixel colors (16bpp)
  9341 0000F4E7 8B02                <1> 	mov	eax, [edx]
  9342 0000F4E9 6601C8              <1> 	add	ax, cx
  9343 0000F4EC 66D1D8              <1> 	rcr	ax, 1
  9344 0000F4EF EBE3                <1> 	jmp	short sysvideo_39_13
  9345                              <1> sysvideo_39_16:
  9346                              <1> 	 ; swap pixel colors (16bpp)
  9347 0000F4F1 89C8                <1> 	mov	eax, ecx
  9348 0000F4F3 668702              <1> 	xchg	[edx], ax
  9349 0000F4F6 EBDF                <1> 	jmp	short sysvideo_39_14
  9350                              <1> sysvideo_39_17:
  9351 0000F4F8 80FF18              <1> 	cmp	bh, 24
  9352 0000F4FB 7743                <1> 	ja	short sysvideo_39_24
  9353 0000F4FD 72C8                <1> 	jb	short sysvideo_39_10  
  9354                              <1> 	
  9355                              <1> 	; 24 bits per pixel
  9356 0000F4FF 81E1FFFFFF00        <1> 	and	ecx, 0FFFFFFh
  9357 0000F505 80FB01              <1> 	cmp	bl, 1 ; 1 = write pixel
  9358 0000F508 7406                <1> 	je	short sysvideo_39_19
  9359 0000F50A 7712                <1> 	ja	short sysvideo_39_22
  9360                              <1> sysvideo_39_18:
  9361                              <1> 	; read pixel (24bpp)
  9362 0000F50C 8B02                <1> 	mov	eax, [edx]
  9363                              <1> 	;and	eax, 0FFFFFFh
  9364                              <1> 	;mov	[u.r0], eax
  9365                              <1> 	;jmp	sysret
  9366 0000F50E EB04                <1> 	jmp	short sysvideo_39_21
  9367                              <1> sysvideo_39_19:
  9368                              <1> 	; write pixel (24bpp)
  9369 0000F510 89C8                <1> 	mov	eax, ecx
  9370                              <1> sysvideo_39_20:
  9371                              <1> 	;and	eax, 0FFFFFFh
  9372 0000F512 8902                <1> 	mov	[edx], eax
  9373                              <1> sysvideo_39_21:
  9374 0000F514 A3[1C010300]        <1> 	mov	[u.r0], eax
  9375 0000F519 E951D8FFFF          <1> 	jmp	sysret
  9376                              <1> sysvideo_39_22:
  9377 0000F51E 80FB03              <1> 	cmp	bl, 3 ; mix
  9378 0000F521 720D                <1> 	jb	short sysvideo_39_23
  9379                              <1> 	; mix  pixel colors (24bpp)
  9380 0000F523 8B02                <1> 	mov	eax, [edx]
  9381 0000F525 25FFFFFF00          <1> 	and	eax, 0FFFFFFh
  9382                              <1> 	;and	ecx, 0FFFFFFh
  9383 0000F52A 01C8                <1> 	add	eax, ecx
  9384 0000F52C D1D8                <1> 	rcr	eax, 1
  9385 0000F52E EBE2                <1> 	jmp	short sysvideo_39_20
  9386                              <1> sysvideo_39_23:
  9387                              <1> 	 ; swap pixel colors (24bpp)
  9388 0000F530 89C8                <1> 	mov	eax, ecx
  9389                              <1> 	;and	eax, 0FFFFFFh
  9390 0000F532 668702              <1> 	xchg	[edx], ax
  9391 0000F535 C1C810              <1> 	ror	eax, 16
  9392 0000F538 884202              <1> 	mov	[edx+2], al	
  9393 0000F53B C1C010              <1> 	rol	eax, 16
  9394 0000F53E EBD4                <1> 	jmp	short sysvideo_39_21
  9395                              <1> 
  9396                              <1> 	; 32 bits per pixel
  9397                              <1> sysvideo_39_24:
  9398 0000F540 80FB01              <1> 	cmp	bl, 1 ; 1 = write pixel
  9399 0000F543 7406                <1> 	je	short sysvideo_39_26
  9400 0000F545 7712                <1> 	ja	short sysvideo_39_29
  9401                              <1> sysvideo_39_25:
  9402                              <1> 	; read pixel (32bpp)
  9403 0000F547 8B02                <1> 	mov	eax, [edx]
  9404                              <1> 	;mov	[u.r0], eax
  9405                              <1> 	;jmp	sysret
  9406 0000F549 EB04                <1> 	jmp	short sysvideo_39_28
  9407                              <1> sysvideo_39_26:
  9408                              <1> 	; write pixel (32bpp)
  9409 0000F54B 89C8                <1> 	mov	eax, ecx
  9410                              <1> sysvideo_39_27:
  9411 0000F54D 8902                <1> 	mov	[edx], eax
  9412                              <1> sysvideo_39_28:
  9413 0000F54F A3[1C010300]        <1> 	mov	[u.r0], eax
  9414 0000F554 E916D8FFFF          <1> 	jmp	sysret
  9415                              <1> sysvideo_39_29:
  9416 0000F559 80FB03              <1> 	cmp	bl, 3 ; mix
  9417 0000F55C 7208                <1> 	jb	short sysvideo_39_30
  9418                              <1> 	; mix  pixel colors (32bpp)
  9419 0000F55E 8B02                <1> 	mov	eax, [edx]
  9420 0000F560 01C8                <1> 	add	eax, ecx
  9421 0000F562 D1D8                <1> 	rcr	eax, 1
  9422 0000F564 EBE7                <1> 	jmp	short sysvideo_39_27
  9423                              <1> sysvideo_39_30:
  9424                              <1> 	 ; swap pixel colors (32bpp)
  9425 0000F566 89C8                <1> 	mov	eax, ecx
  9426 0000F568 8702                <1> 	xchg	[edx], eax
  9427 0000F56A EBE3                <1> 	jmp	short sysvideo_39_28
  9428                              <1> 
  9429                              <1> sysvideo_39_31:
  9430                              <1> 	; 06/03/2021
  9431                              <1> 	; 08/02/2021
  9432                              <1> 	; 07/02/2021
  9433                              <1> 	; BL = 4 -> read pixels from user defined positions
  9434                              <1> 	; BL = 5 -> write single color pixels to user defined pos.
  9435                              <1> 	; BL = 6 -> write multi color pixels to user defined pos.
  9436                              <1> 	; ECX = color (CL, CX, ECX)
  9437                              <1> 	; EDX = number of pixels
  9438                              <1> 	; ESI = user buffer contains dword pixel positions
  9439                              <1> 	;	 (and dword colors for BL input = 6)
  9440                              <1> 	; EDI = user's pixel color buff (destination) for BL = 4
  9441                              <1> 
  9442 0000F56C 890D[4E100300]      <1> 	mov	[maskcolor], ecx
  9443 0000F572 89D5                <1> 	mov	ebp, edx ; number of pixels    
  9444 0000F574 803D[1E670000]FF    <1> 	cmp	byte [CRT_MODE], 0FFh ; SVGA flag
  9445 0000F57B 7317                <1> 	jnb	short sysvideo_39_33 ; SVGA (VESA VBE mode)
  9446                              <1> 	; Standard VGA mode
  9447 0000F57D B900000100          <1> 	mov	ecx, 65536 ; Video page size (maximum)
  9448 0000F582 39CA                <1> 	cmp	edx, ecx
  9449 0000F584 7709                <1> 	ja	short sysvideo_39_32 ; abnormal value !
  9450 0000F586 B800000A00          <1> 	mov	eax, 0A0000h ; Video page start address
  9451 0000F58B B708                <1> 	mov	bh, 8  ; 8 bits per pixel (256 colors)
  9452 0000F58D EB35                <1> 	jmp	short sysvideo_39_34
  9453                              <1> sysvideo_39_32:
  9454                              <1> 	; nonsense! (edx has abnormal value)
  9455 0000F58F E9DBD7FFFF          <1> 	jmp	sysret	
  9456                              <1> sysvideo_39_33:
  9457                              <1> 	; 06/03/2021
  9458 0000F594 8A3D[EC0F0300]      <1> 	mov	bh, [LFB_Info+LFBINFO.bpp]
  9459 0000F59A 80FF08              <1> 	cmp	bh, 8
  9460 0000F59D 7412                <1> 	je	short sysvideo_39_81 ; 8bpp
  9461 0000F59F 89D0                <1> 	mov	eax, edx
  9462 0000F5A1 80FF10              <1> 	cmp	bh, 16
  9463 0000F5A4 7409                <1> 	je	short sysvideo_39_80 ; 16bpp
  9464 0000F5A6 D1E2                <1> 	shl	edx, 1
  9465 0000F5A8 80FF20              <1> 	cmp	bh, 32
  9466 0000F5AB 7502                <1> 	jne	short sysvideo_39_80 ; 24bpp
  9467 0000F5AD D1E0                <1> 	shl	eax, 1
  9468                              <1> sysvideo_39_80:	
  9469 0000F5AF 01C2                <1> 	add	edx, eax
  9470                              <1> 	; edx = number of bytes
  9471                              <1> sysvideo_39_81:
  9472                              <1> 	; get LFB address
  9473 0000F5B1 A1[E00F0300]        <1> 	mov	eax, [LFB_ADDR] ; [LFB_Info+LFBINFO.LFB_addr]
  9474 0000F5B6 09C0                <1> 	or	eax, eax
  9475 0000F5B8 74D5                <1> 	jz	short sysvideo_39_32 ; LFB is not ready !
  9476 0000F5BA 8B0D[E40F0300]      <1> 	mov	ecx, [LFB_SIZE]
  9477 0000F5C0 39CA                <1> 	cmp	edx, ecx 
  9478 0000F5C2 77CB                <1> 	ja	short sysvideo_39_32 ; abnormal value !
  9479                              <1> 
  9480                              <1> 	; 02/03/2021
  9481                              <1> 	; 08/02/2021
  9482                              <1> 	;mov	ebp, edx ; pixel count  
  9483                              <1> 	;shl	ebp, 2 ; byte count (pixel pos: 4 bytes)
  9484                              <1> 
  9485                              <1> 	; 06/03/2021
  9486                              <1> 	; bits per pixel (pixel color size)
  9487                              <1> 	;mov	bh, [LFB_Info+LFBINFO.bpp]	
  9488                              <1> sysvideo_39_34:
  9489 0000F5C4 C1E502              <1> 	shl	ebp, 2 ; 15/02/2021 (byte count)	
  9490 0000F5C7 A3[3E100300]        <1> 	mov	[v_mem], eax ; Save video page start address
  9491 0000F5CC 88DE                <1> 	mov	dh, bl ; sub function
  9492                              <1> 	; 06/03/2021
  9493 0000F5CE 883D[3D100300]      <1> 	mov	[v_bpp], bh ; bits per pixel (color size)
  9494                              <1> 	;mov	ebx, [LFB_SIZE]
  9495 0000F5D4 89CB                <1> 	mov	ebx, ecx ; [LFB_SIZE]
  9496                              <1> 
  9497 0000F5D6 B900080000          <1> 	mov	ecx, 2048
  9498 0000F5DB 39CD                <1> 	cmp	ebp, ecx
  9499 0000F5DD 7302                <1> 	jnb	short sysvideo_39_35 	
  9500 0000F5DF 89E9                <1> 	mov	ecx, ebp ; fix to requested byte count	
  9501                              <1> sysvideo_39_35:
  9502 0000F5E1 80FE04              <1> 	cmp	dh, 4 ; 08/02/2021
  9503                              <1> 	;cmp	bl, 4 ; read pixels from user defined positions 
  9504 0000F5E4 7605                <1> 	jna	short sysvideo_39_36
  9505 0000F5E6 E9B2000000          <1> 	jmp	sysvideo_39_52
  9506                              <1> 	; 08/02/2021
  9507                              <1> 	;mov	[buffer8], edi  ; user's destination buff addr
  9508                              <1> sysvideo_39_36:
  9509                              <1> 	; 08/02/2021
  9510                              <1> 	; read pixel positions 
  9511                              <1> 	; as defined in user's source buffer 
  9512 0000F5EB 893D[56100300]      <1> 	mov	[buffer8], edi  ; user's destination buff addr
  9513 0000F5F1 BF00760900          <1> 	mov	edi, VBE3SAVERESTOREBLOCK ; kernel buffer for
  9514                              <1> 					  ; 2028 byte data
  9515                              <1> 	; esi = user's source buffer for pixel positions
  9516                              <1> 	; ecx = byte count
  9517 0000F5F6 E8F8170000          <1> 	call	transfer_from_user_buffer
  9518 0000F5FB 7292                <1> 	jc	short sysvideo_39_32 ; error
  9519                              <1> 	; ecx  = transfer count (bytes)
  9520                              <1> 
  9521 0000F5FD 57                  <1> 	push	edi ; *
  9522 0000F5FE 56                  <1> 	push	esi ; **
  9523 0000F5FF 51                  <1> 	push	ecx ; ***
  9524                              <1> 
  9525 0000F600 89FE                <1> 	mov	esi, edi ; kernel buffer
  9526 0000F602 8B15[3E100300]      <1> 	mov	edx, [v_mem] ; video memory
  9527 0000F608 C1E902              <1> 	shr	ecx, 2 ; pixel count (within buffer capacity)
  9528                              <1> 
  9529 0000F60B 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  9530 0000F612 7753                <1> 	ja	short sysvideo_39_49
  9531                              <1> sysvideo_39_37:
  9532                              <1> 	; 8bpp
  9533 0000F614 AD                  <1> 	lodsd
  9534 0000F615 39D8                <1> 	cmp	eax, ebx ; < [LFB_SIZE]
  9535 0000F617 7309                <1> 	jnb	short sysvideo_39_39
  9536 0000F619 0FB60402            <1> 	movzx	eax, byte [edx+eax]
  9537                              <1> sysvideo_39_38:
  9538 0000F61D AB                  <1> 	stosd
  9539 0000F61E E2F4                <1> 	loop	sysvideo_39_37
  9540 0000F620 EB49                <1> 	jmp	short sysvideo_39_50
  9541                              <1> sysvideo_39_39:
  9542                              <1> 	; write black color for improper positions
  9543 0000F622 31C0                <1> 	xor	eax, eax
  9544 0000F624 EBF7                <1> 	jmp	short sysvideo_39_38
  9545                              <1> sysvideo_39_40:
  9546 0000F626 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  9547 0000F62D 772A                <1> 	ja	short sysvideo_39_47 ; 32bpp
  9548 0000F62F 7216                <1> 	jb	short sysvideo_39_44 ; 16bpp
  9549                              <1> sysvideo_39_41: 
  9550                              <1> 	; 24bpp
  9551 0000F631 AD                  <1> 	lodsd
  9552 0000F632 39D8                <1> 	cmp	eax, ebx ; < [LFB_SIZE]
  9553 0000F634 730D                <1> 	jnb	short sysvideo_39_43
  9554 0000F636 8B0402              <1> 	mov	eax, [edx+eax]
  9555 0000F639 25FFFFFF00          <1> 	and	eax, 0FFFFFFh
  9556                              <1> sysvideo_39_42:
  9557 0000F63E AB                  <1> 	stosd
  9558 0000F63F E2F0                <1> 	loop	sysvideo_39_41
  9559 0000F641 EB28                <1> 	jmp	short sysvideo_39_50
  9560                              <1> sysvideo_39_43:
  9561                              <1> 	; write black color for improper positions
  9562 0000F643 31C0                <1> 	xor	eax, eax
  9563 0000F645 EBF7                <1> 	jmp	short sysvideo_39_42
  9564                              <1> sysvideo_39_44:
  9565                              <1> 	; 16bpp
  9566 0000F647 AD                  <1> 	lodsd
  9567 0000F648 39D8                <1> 	cmp	eax, ebx ; < [LFB_SIZE]
  9568 0000F64A 7309                <1> 	jnb	short sysvideo_39_46
  9569 0000F64C 0FB70402            <1> 	movzx	eax, word [edx+eax]
  9570                              <1> sysvideo_39_45:
  9571 0000F650 AB                  <1> 	stosd
  9572 0000F651 E2F4                <1> 	loop	sysvideo_39_44
  9573 0000F653 EB16                <1> 	jmp	short sysvideo_39_50
  9574                              <1> sysvideo_39_46:
  9575                              <1> 	; write black color for improper positions
  9576 0000F655 31C0                <1> 	xor	eax, eax
  9577 0000F657 EBF7                <1> 	jmp	short sysvideo_39_45
  9578                              <1> sysvideo_39_47:
  9579                              <1> 	; 32bpp
  9580 0000F659 AD                  <1> 	lodsd
  9581 0000F65A 39D8                <1> 	cmp	eax, ebx ; < [LFB_SIZE]
  9582 0000F65C 7309                <1> 	jnb	short sysvideo_39_49
  9583 0000F65E 0FB70402            <1> 	movzx	eax, word [edx+eax]
  9584                              <1> sysvideo_39_48:
  9585 0000F662 AB                  <1> 	stosd
  9586 0000F663 E2F4                <1> 	loop	sysvideo_39_47
  9587 0000F665 EB04                <1> 	jmp	short sysvideo_39_50
  9588                              <1> sysvideo_39_49:
  9589                              <1> 	; write black color for improper positions
  9590 0000F667 31C0                <1> 	xor	eax, eax
  9591 0000F669 EBF7                <1> 	jmp	short sysvideo_39_48
  9592                              <1> sysvideo_39_50:
  9593 0000F66B 59                  <1> 	pop	ecx ; transfer count in bytes
  9594 0000F66C 5E                  <1> 	pop	esi ; ** ; kernel buffer
  9595                              <1>  	;mov	esi, VBE3SAVERESTOREBLOCK ; kernel buffer for
  9596                              <1> 					  ; 2048 byte data
  9597 0000F66D 8B3D[56100300]      <1> 	mov	edi, [buffer8]
  9598                              <1> 	; edi = user's destination buffer for pixel colors
  9599                              <1> 	; ecx = byte count
  9600 0000F673 E831170000          <1> 	call	transfer_to_user_buffer
  9601 0000F678 5E                  <1> 	pop	esi ; *
  9602 0000F679 7266                <1> 	jc	short sysvideo_39_56 ; error
  9603                              <1> 	; ecx  = transfer count (bytes)
  9604 0000F67B 89C8                <1> 	mov	eax, ecx
  9605 0000F67D C1E802              <1> 	shr	eax, 2
  9606 0000F680 0105[1C010300]      <1> 	add	[u.r0], eax ; transfer count (in pixels)
  9607                              <1> 		
  9608 0000F686 29CD                <1> 	sub	ebp, ecx
  9609 0000F688 7657                <1> 	jna	short sysvideo_39_56 ; completed/finished
  9610 0000F68A 01CE                <1> 	add	esi, ecx ; next position in source buffer
  9611                              <1> 	;add	[buffer8], ecx ; next pos in destination buff
  9612 0000F68C 01CF                <1> 	add	edi, ecx
  9613 0000F68E 66B90008            <1> 	mov	cx, 2048 ; new count, limit: kernel buff size
  9614 0000F692 39CD                <1> 	cmp	ebp, ecx ; remain >= limit ?
  9615 0000F694 7302                <1> 	jnb	short sysvideo_39_51 ; yes
  9616 0000F696 89E9                <1> 	mov	ecx, ebp ; fix byte count to remain bytes
  9617                              <1> sysvideo_39_51:
  9618 0000F698 E94EFFFFFF          <1> 	jmp	sysvideo_39_36 
  9619                              <1> 
  9620                              <1> sysvideo_39_52:
  9621 0000F69D 80FE05              <1> 	cmp	dh, 5 ; 08/02/2021
  9622                              <1> 	;cmp	bl, 5 ; write pixels to user defined positions 
  9623 0000F6A0 7605                <1> 	jna	short sysvideo_39_53
  9624 0000F6A2 E9A1000000          <1> 	jmp	sysvideo_39_66
  9625                              <1> sysvideo_39_53:
  9626                              <1> 	; single color pixel writing
  9627 0000F6A7 BF00760900          <1> 	mov	edi, VBE3SAVERESTOREBLOCK ; kernel buffer for
  9628                              <1> 					  ; 2028 byte data
  9629                              <1> 	; esi = user's source buffer for pixel positions
  9630                              <1> 	; ecx = byte count
  9631 0000F6AC E842170000          <1> 	call	transfer_from_user_buffer
  9632 0000F6B1 722E                <1> 	jc	short sysvideo_39_56 ; error
  9633                              <1> 	; ecx = transfer count (bytes)
  9634                              <1> 
  9635                              <1> 	; write pixels by using (user) defined positions
  9636                              <1> 	; ecx = byte count (1,2,3,4 times pixel count)	
  9637                              <1> 	; edi = system buffer address
  9638                              <1> 
  9639 0000F6B3 56                  <1> 	push	esi ; *
  9640 0000F6B4 51                  <1> 	push	ecx ; **
  9641                              <1> 
  9642 0000F6B5 89FE                <1> 	mov	esi, edi
  9643 0000F6B7 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  9644                              <1> 
  9645                              <1> 	; 08/02/2021
  9646 0000F6BD C1E902              <1> 	shr	ecx, 2 ; pixel count
  9647 0000F6C0 8B15[4E100300]      <1> 	mov	edx, [maskcolor]
  9648                              <1> 	;mov	ebx, [v_siz]
  9649                              <1> 
  9650 0000F6C6 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  9651 0000F6CD 7717                <1> 	ja	short sysvideo_39_57
  9652                              <1> sysvideo_39_54:
  9653                              <1> 	; 8bpp
  9654 0000F6CF AD                  <1> 	lodsd
  9655 0000F6D0 39D8                <1> 	cmp	eax, ebx ; < [v_siz]
  9656 0000F6D2 7309                <1> 	jnb	short sysvideo_39_55
  9657 0000F6D4 881407              <1> 	mov	[edi+eax], dl
  9658                              <1> 	; 06/03/2021
  9659 0000F6D7 FF05[1C010300]      <1> 	inc	dword [u.r0]
  9660                              <1> sysvideo_39_55:
  9661 0000F6DD E2F0                <1> 	loop	sysvideo_39_54
  9662 0000F6DF EB50                <1> 	jmp	short sysvideo_39_64
  9663                              <1> sysvideo_39_56:
  9664 0000F6E1 E989D6FFFF          <1> 	jmp	sysret
  9665                              <1> sysvideo_39_57:
  9666 0000F6E6 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  9667 0000F6ED 7732                <1> 	ja	short sysvideo_39_62 ; 32bpp
  9668 0000F6EF 721D                <1> 	jb	short sysvideo_39_60 ; 16bpp
  9669                              <1> sysvideo_39_58: 
  9670                              <1> 	; 24bpp
  9671 0000F6F1 AD                  <1> 	lodsd
  9672 0000F6F2 39D8                <1> 	cmp	eax, ebx ; < [v_siz]
  9673 0000F6F4 7314                <1> 	jnb	short sysvideo_39_59
  9674 0000F6F6 881407              <1> 	mov	[edi+eax], dl
  9675 0000F6F9 40                  <1> 	inc	eax
  9676 0000F6FA C1CA08              <1> 	ror	edx, 8
  9677 0000F6FD 66891407            <1> 	mov	[edi+eax], dx
  9678 0000F701 C1C208              <1> 	rol	edx, 8
  9679 0000F704 FF05[1C010300]      <1> 	inc	dword [u.r0]
  9680                              <1> sysvideo_39_59:
  9681 0000F70A E2E5                <1> 	loop	sysvideo_39_58
  9682 0000F70C EB23                <1> 	jmp	short sysvideo_39_64
  9683                              <1> sysvideo_39_60:
  9684                              <1> 	; 16bpp
  9685 0000F70E AD                  <1> 	lodsd
  9686 0000F70F 39D8                <1> 	cmp	eax, ebx ; < [v_siz]
  9687 0000F711 730A                <1> 	jnb	short sysvideo_39_61
  9688 0000F713 66891407            <1> 	mov	[edi+eax], dx
  9689 0000F717 FF05[1C010300]      <1> 	inc	dword [u.r0]
  9690                              <1> sysvideo_39_61:	
  9691 0000F71D E2EF                <1> 	loop	sysvideo_39_60
  9692 0000F71F EB10                <1> 	jmp	short sysvideo_39_64	
  9693                              <1> sysvideo_39_62:
  9694                              <1> 	; 32bpp
  9695 0000F721 AD                  <1> 	lodsd
  9696 0000F722 39D8                <1> 	cmp	eax, ebx ; < [v_siz]
  9697 0000F724 7309                <1> 	jnb	short sysvideo_39_63
  9698 0000F726 891407              <1> 	mov	[edi+eax], edx
  9699 0000F729 FF05[1C010300]      <1> 	inc	dword [u.r0]
  9700                              <1> sysvideo_39_63:	
  9701 0000F72F E2F0                <1> 	loop	sysvideo_39_62
  9702                              <1> sysvideo_39_64:
  9703 0000F731 59                  <1> 	pop	ecx ; **
  9704 0000F732 5E                  <1> 	pop	esi ; *	
  9705 0000F733 29CD                <1> 	sub	ebp, ecx
  9706 0000F735 76AA                <1> 	jna	short sysvideo_39_56
  9707 0000F737 01CE                <1> 	add	esi, ecx
  9708 0000F739 66B90008            <1> 	mov	cx, 2048
  9709 0000F73D 39CD                <1> 	cmp	ebp, ecx
  9710 0000F73F 7302                <1> 	jnb	short sysvideo_39_65
  9711 0000F741 89E9                <1> 	mov	ecx, ebp
  9712                              <1> sysvideo_39_65:
  9713 0000F743 E95FFFFFFF          <1> 	jmp	sysvideo_39_53
  9714                              <1> 
  9715                              <1> sysvideo_39_66:
  9716                              <1> 	; 15/02/2021
  9717 0000F748 D1E5                <1> 	shl	ebp, 1 ; 8 bytes per pixel (position&color)
  9718                              <1> sysvideo_39_67: 	
  9719 0000F74A 66B90008            <1> 	mov	cx, 2048
  9720 0000F74E 39CD                <1> 	cmp	ebp, ecx
  9721 0000F750 7302                <1> 	jnb	short sysvideo_39_68
  9722 0000F752 89E9                <1> 	mov	ecx, ebp
  9723                              <1> sysvideo_39_68:
  9724                              <1> 	; multi colors pixel writing
  9725 0000F754 BF00760900          <1> 	mov	edi, VBE3SAVERESTOREBLOCK ; kernel buffer for
  9726                              <1> 					  ; 2048 byte data
  9727                              <1> 	; esi = user's source buffer for pixel positions
  9728                              <1> 	; ecx = byte count
  9729 0000F759 E895160000          <1> 	call	transfer_from_user_buffer
  9730 0000F75E 7281                <1> 	jc	short sysvideo_39_56 ; error
  9731                              <1> 	; ecx  = transfer count
  9732                              <1> 	
  9733                              <1> 	; write pixels & colors as defined in user buffer 
  9734                              <1> 	; ecx = byte count (2,4,6,8 times pixel count)	
  9735                              <1> 	; edi = system buffer address
  9736                              <1> 
  9737 0000F760 56                  <1> 	push	esi ; **
  9738 0000F761 51                  <1> 	push	ecx ; *
  9739                              <1> 
  9740 0000F762 89FE                <1> 	mov	esi, edi
  9741 0000F764 8B3D[3E100300]      <1> 	mov	edi, [v_mem]
  9742                              <1> 
  9743                              <1> 	; 08/02/2021
  9744 0000F76A C1E903              <1> 	shr	ecx, 3 ; pixel count
  9745                              <1> 
  9746                              <1> 	;mov	ebx, [v_siz]
  9747                              <1> 
  9748 0000F76D 803D[3D100300]08    <1> 	cmp	byte [v_bpp], 8 ; 8bpp
  9749 0000F774 7715                <1> 	ja	short sysvideo_39_71
  9750                              <1> sysvideo_39_69:
  9751                              <1> 	; 8bpp
  9752 0000F776 AD                  <1> 	lodsd	; position
  9753 0000F777 89C2                <1> 	mov	edx, eax
  9754 0000F779 AD                  <1> 	lodsd	; color
  9755 0000F77A 39DA                <1> 	cmp	edx, ebx ; < [v_siz]
  9756 0000F77C 7309                <1> 	jnb	short sysvideo_39_70
  9757 0000F77E 880417              <1> 	mov	[edi+edx], al
  9758                              <1> 	; 06/03/2021
  9759 0000F781 FF05[1C010300]      <1> 	inc	dword [u.r0]
  9760                              <1> sysvideo_39_70:
  9761 0000F787 E2ED                <1> 	loop	sysvideo_39_69
  9762 0000F789 EB51                <1> 	jmp	short sysvideo_39_78
  9763                              <1> sysvideo_39_71:
  9764 0000F78B 803D[3D100300]18    <1> 	cmp	byte [v_bpp], 24 ; 24bpp
  9765 0000F792 7735                <1> 	ja	short sysvideo_39_76 ; 32bpp
  9766 0000F794 721D                <1> 	jb	short sysvideo_39_74 ; 16bpp
  9767                              <1> sysvideo_39_72:
  9768                              <1> 	; 24bpp 
  9769 0000F796 AD                  <1> 	lodsd	; position
  9770 0000F797 89C2                <1> 	mov	edx, eax
  9771 0000F799 AD                  <1> 	lodsd	; color
  9772 0000F79A 39DA                <1> 	cmp	edx, ebx ; < [v_siz]
  9773 0000F79C 7311                <1> 	jnb	short sysvideo_39_73
  9774 0000F79E 880417              <1> 	mov	[edi+edx], al
  9775 0000F7A1 42                  <1> 	inc	edx
  9776 0000F7A2 C1E808              <1> 	shr	eax, 8
  9777 0000F7A5 66890417            <1> 	mov	[edi+edx], ax
  9778 0000F7A9 FF05[1C010300]      <1> 	inc	dword [u.r0]
  9779                              <1> sysvideo_39_73:	
  9780 0000F7AF E2E5                <1> 	loop	sysvideo_39_72
  9781 0000F7B1 EB29                <1> 	jmp	short sysvideo_39_78
  9782                              <1> sysvideo_39_74:
  9783                              <1> 	; 16bpp
  9784 0000F7B3 AD                  <1> 	lodsd	; position
  9785 0000F7B4 89C2                <1> 	mov	edx, eax
  9786 0000F7B6 AD                  <1> 	lodsd	; color
  9787 0000F7B7 39DA                <1> 	cmp	edx, ebx ; < [v_siz]
  9788 0000F7B9 730A                <1> 	jnb	short sysvideo_39_75
  9789 0000F7BB 66890417            <1> 	mov	[edi+edx], ax
  9790 0000F7BF FF05[1C010300]      <1> 	inc	dword [u.r0]
  9791                              <1> sysvideo_39_75:	
  9792 0000F7C5 E2EC                <1> 	loop	sysvideo_39_74
  9793 0000F7C7 EB13                <1> 	jmp	short sysvideo_39_78
  9794                              <1> sysvideo_39_76:
  9795                              <1> 	; 32bpp
  9796 0000F7C9 AD                  <1> 	lodsd	; position
  9797 0000F7CA 89C2                <1> 	mov	edx, eax
  9798 0000F7CC AD                  <1> 	lodsd	; color
  9799 0000F7CD 39DA                <1> 	cmp	edx, ebx ; < [v_siz]
  9800 0000F7CF 7309                <1> 	jnb	short sysvideo_39_77
  9801 0000F7D1 890417              <1> 	mov	[edi+edx], eax
  9802 0000F7D4 FF05[1C010300]      <1> 	inc	dword [u.r0]
  9803                              <1> sysvideo_39_77:	
  9804 0000F7DA E2ED                <1> 	loop	sysvideo_39_76
  9805                              <1> sysvideo_39_78:
  9806 0000F7DC 59                  <1> 	pop	ecx ; *
  9807 0000F7DD 5E                  <1> 	pop	esi ; **	
  9808                              <1> 
  9809 0000F7DE 29CD                <1> 	sub	ebp, ecx
  9810 0000F7E0 762A                <1> 	jna	short sysvideo_39_79
  9811 0000F7E2 01CE                <1> 	add	esi, ecx
  9812 0000F7E4 E961FFFFFF          <1> 	jmp	sysvideo_39_67
  9813                              <1> ;sysvideo_39_79:
  9814                              <1> ;	jmp	sysret
  9815                              <1> 		
  9816                              <1> sysvideo_16:
  9817                              <1> 	; 11/08/2022
  9818                              <1> 	; 23/07/2022
  9819                              <1> 	; 06/03/2021
  9820                              <1> 	; 23/11/2020
  9821 0000F7E9 80FF04              <1> 	cmp	bh, 4
  9822                              <1> 	;jb	sysvideo_39 ; bh = 3, pixel r/w
  9823                              <1> 	;ja	short sysvideo_17
  9824                              <1> 	; 23/07/2022
  9825 0000F7EC 7407                <1> 	je	short sysvideo_16_0
  9826 0000F7EE 7721                <1> 	ja	short sysvideo_17
  9827 0000F7F0 E94EFCFFFF          <1> 	jmp	sysvideo_39
  9828                              <1> sysvideo_16_0:	
  9829                              <1> 	; BH = 4
  9830                              <1> 	; Direct User Access for CGA video memory.
  9831                              <1> 	; Setup user's page tables for direct access to 0B8000h.
  9832                              <1> 	;
  9833                              <1> 	; Permission checks are not implemented yet !
  9834                              <1> 	; (11/07/2016)
  9835                              <1> 
  9836 0000F7F5 B800800B00          <1> 	mov	eax, 0B8000h
  9837                              <1> 	;mov	ecx, 8 ; 8 pages (8*4K=32K)
  9838                              <1> 	; 11/08/2022
  9839 0000F7FA 31C9                <1> 	xor	ecx, ecx
  9840 0000F7FC B108                <1> 	mov	cl, 8
  9841 0000F7FE 89C3                <1> 	mov	ebx, eax ; 12/05/2017 ; virtual = physical
  9842 0000F800 E89166FFFF          <1> 	call	direct_memory_access	
  9843                              <1> 	;jc	sysret
  9844 0000F805 7205                <1> 	jc	short sysvideo_39_79 ; 06/03/2021
  9845                              <1> 	; eax = 0B8000h if there is not an error
  9846 0000F807 A3[1C010300]        <1> 	mov	[u.r0], eax
  9847                              <1> sysvideo_39_79: ; 08/01/2021
  9848 0000F80C E95ED5FFFF          <1> 	jmp	sysret
  9849                              <1> 
  9850                              <1> sysvideo_17:
  9851                              <1> 	; 23/07/2022
  9852                              <1> 	; 23/12/2020
  9853                              <1> 	; 11/12/2020
  9854                              <1> 	; 10/12/2020
  9855                              <1> 	; 23/11/2020
  9856 0000F811 80FF06              <1> 	cmp	bh, 6
  9857 0000F814 7424                <1> 	je	short sysvideo_17_0 ; 23/07/2022
  9858 0000F816 7205                <1> 	jb	short sysvideo_18 ; 23/07/2022
  9859 0000F818 E95E010000          <1> 	jmp	sysvideo_20 ; ja
  9860                              <1> 
  9861                              <1> 	; 23/07/2022
  9862                              <1> sysvideo_18:
  9863                              <1> 	; BH = 5
  9864                              <1> 	; Direct User Access for VGA video memory.
  9865                              <1> 	; Setup user's page tables for direct access to 0A0000h.
  9866                              <1> 	;
  9867                              <1> 	; Permission checks are not implemented yet !
  9868                              <1> 	; (11/07/2016)
  9869                              <1> 
  9870 0000F81D B800000A00          <1> 	mov	eax, 0A0000h
  9871 0000F822 B910000000          <1> 	mov	ecx, 16 ; 16 pages (16*4K=64K)
  9872 0000F827 89C3                <1> 	mov	ebx, eax ; 12/05/2017 ; virtual = physical
  9873 0000F829 E86866FFFF          <1> 	call	direct_memory_access	
  9874                              <1> 	;jc	sysret
  9875                              <1> 	; 23/07/2022
  9876 0000F82E 7205                <1> 	jc	short sysvideo_18_0
  9877                              <1> 	; eax = 0A0000h if there is not an error
  9878 0000F830 A3[1C010300]        <1> 	mov	[u.r0], eax
  9879                              <1> sysvideo_18_0:
  9880 0000F835 E935D5FFFF          <1> 	jmp	sysret
  9881                              <1> 
  9882                              <1> sysvideo_17_0:
  9883                              <1> 	; BH = 6
  9884                              <1> 	; Direct User Access to Linear Frame Buffer.
  9885                              <1> 	; Setup user's page tables for direct access to LFB.
  9886                              <1> 	;
  9887                              <1> 	; Permission checks are not implemented yet !
  9888                              <1> 	; (10/12/2020)
  9889                              <1> 
  9890 0000F83A 80FBFF              <1> 	cmp	bl, 0FFh ; current video mode
  9891 0000F83D 722C                <1> 	jb	short sysvideo_17_2 ; for desired video mode
  9892                              <1> 
  9893 0000F83F 381D[1E670000]      <1> 	cmp	[CRT_MODE], bl ; VESA VBE video mode ?
  9894 0000F845 750E                <1> 	jne	short sysvideo_17_1
  9895 0000F847 668B0D[D20F0300]    <1> 	mov	cx, [video_mode]
  9896 0000F84E 6681E1FF01          <1> 	and	cx, 1FFh
  9897 0000F853 EB29                <1> 	jmp	short sysvideo_17_3
  9898                              <1> sysvideo_17_1:
  9899                              <1> 	; 11/12/2020
  9900 0000F855 88DF                <1> 	mov	bh, bl ; 0FFh
  9901 0000F857 8A1D[1E670000]      <1> 	mov	bl, [CRT_MODE] ; VGA/CGA video mode
  9902 0000F85D 8B2D[18010300]      <1> 	mov	ebp, [u.usp]  ; ebp points to user's registers
  9903                              <1> 	; 23/12/2020
  9904 0000F863 895D10              <1> 	mov	[ebp+16], ebx ; return to user with EBX value 
  9905 0000F866 E904D5FFFF          <1> 	jmp	sysret ; return to user with EAX = 0
  9906                              <1> sysvideo_17_2:
  9907                              <1> 	; bl = VESA video mode - 100h
  9908 0000F86B B701                <1> 	mov	bh, 1 ; bx = 1XXh
  9909 0000F86D 53                  <1> 	push	ebx ; requested vesa video mode
  9910 0000F86E E8D641FFFF          <1> 	call	vbe_biosfn_return_current_mode
  9911 0000F873 59                  <1> 	pop	ecx ; requested vesa video mode
  9912 0000F874 6681E3FF01          <1> 	and	bx, 1FFh
  9913 0000F879 6639D9              <1> 	cmp	cx, bx
  9914 0000F87C 7564                <1> 	jne	short sysvideo_17_8
  9915                              <1> sysvideo_17_3:
  9916 0000F87E 663B0D[DE0F0300]    <1> 	cmp	cx, [LFB_Info+LFBINFO.mode]
  9917 0000F885 755B                <1> 	jne	short sysvideo_17_8
  9918                              <1> sysvideo_17_4:
  9919                              <1> 	; 11/12/2020
  9920 0000F887 A1[E00F0300]        <1> 	mov	eax, [LFB_Info+LFBINFO.LFB_addr]
  9921                              <1> 	; 21/12/2020
  9922 0000F88C 09C0                <1> 	or	eax, eax
  9923 0000F88E 744D                <1> 	jz	short sysvideo_17_7
  9924                              <1> 	;
  9925 0000F890 8B0D[E40F0300]      <1> 	mov	ecx, [LFB_Info+LFBINFO.LFB_size] ; buff size
  9926 0000F896 89C3                <1> 	mov 	ebx, eax ; user's address = physical address
  9927                              <1> 	;push	ebx
  9928 0000F898 51                  <1> 	push	ecx
  9929                              <1> 	; 21/12/2020
  9930 0000F899 81C1FF0F0000        <1> 	add	ecx, 4095  ; PAGESIZE - 1
  9931                              <1> 	; 14/12/2020
  9932 0000F89F C1E90C              <1> 	shr	ecx, 12  ; convert bytes to pages
  9933 0000F8A2 E8EF65FFFF          <1> 	call	direct_memory_access
  9934 0000F8A7 5A                  <1> 	pop	edx  ; linear frame buffer size in bytes
  9935                              <1> 	;pop	eax  ; linear frame buffer address (physical)
  9936 0000F8A8 7233                <1> 	jc	short sysvideo_17_7 ; [u.r0] = eax = 0
  9937                              <1> sysvideo_17_5:
  9938 0000F8AA 668B0D[EA0F0300]    <1> 	mov	cx, [LFB_Info+LFBINFO.Y_res] ; screen height
  9939 0000F8B1 C1E110              <1> 	shl	ecx, 16
  9940 0000F8B4 668B0D[E80F0300]    <1> 	mov	cx,  [LFB_Info+LFBINFO.X_res] ; screen width
  9941 0000F8BB 31DB                <1> 	xor	ebx, ebx
  9942 0000F8BD 8A1D[EC0F0300]      <1> 	mov	bl, [LFB_Info+LFBINFO.bpp] ; bits per pixel
  9943 0000F8C3 8A3D[DE0F0300]      <1> 	mov	bh, [LFB_Info+LFBINFO.mode] ; XX part of 1XXh
  9944                              <1> sysvideo_26_4: ; 23/12/2020	
  9945 0000F8C9 8B2D[18010300]      <1> 	mov	ebp, [u.usp]  ; ebp points to user's registers
  9946 0000F8CF 895514              <1> 	mov	[ebp+20], edx ; return to user with EDX value 
  9947 0000F8D2 895D10              <1> 	mov	[ebp+16], ebx ; EBX
  9948 0000F8D5 894D18              <1> 	mov	[ebp+24], ecx ; ECX
  9949                              <1> sysvideo_17_6:
  9950 0000F8D8 A3[1C010300]        <1> 	mov	[u.r0], eax ; LFB address
  9951                              <1> sysvideo_17_7:
  9952 0000F8DD E98DD4FFFF          <1> 	jmp	sysret 
  9953                              <1> sysvideo_17_8:
  9954                              <1> 	; cx = mode
  9955                              <1> 	; 21/12/2020
  9956 0000F8E2 80CD40              <1> 	or	ch, 40h  ; Linear frame buffer flag	
  9957 0000F8E5 E8823FFFFF          <1> 	call	_vbe_biosfn_return_mode_info
  9958 0000F8EA 72F1                <1> 	jc	short sysvideo_17_7
  9959 0000F8EC EB99                <1> 	jmp	short sysvideo_17_4
  9960                              <1> 	
  9961                              <1> sysvideo_19:	
  9962                              <1> 	; 23/07/2022
  9963                              <1> 	; 22/01/2021
  9964                              <1> 	; 12/12/2020
  9965                              <1> 	; 11/12/2020
  9966                              <1> 	; 23/11/2020
  9967                              <1> 	; BH = 7
  9968                              <1> 	; Get (Super/Extended VGA) mode
  9969                              <1> 	; and Linear Frame Buffer info.
  9970                              <1> 	
  9971                              <1> 	; 22/01/2021
  9972 0000F8EE B3FF                <1> 	mov	bl, 0FFh
  9973                              <1> 	; 11/12/2020
  9974                              <1> 	;cmp	byte [CRT_MODE], 0FFh ; (extended mode?)
  9975                              <1> 	; 22/01/2021
  9976 0000F8F0 381D[1E670000]      <1> 	cmp	[CRT_MODE], bl  ; 0FFh
  9977                              <1> 	;jb	short sysvideo_17_1 ; not a VESA VBE mode
  9978                              <1> 	; 23/07/2022
  9979                              <1> 	; 12/12/2020
  9980 0000F8F6 7305                <1> 	jnb	short sysvideo_19_0
  9981                              <1> 	; 23/07/2022
  9982 0000F8F8 E958FFFFFF          <1> 	jmp	sysvideo_17_1
  9983                              <1> 
  9984                              <1> sysvideo_19_0:
  9985 0000F8FD E84741FFFF          <1> 	call	vbe_biosfn_return_current_mode
  9986 0000F902 6681E3FF01          <1> 	and	bx, 1FFh
  9987 0000F907 663B1D[DE0F0300]    <1> 	cmp	bx, [LFB_Info+LFBINFO.mode]
  9988 0000F90E 750D                <1> 	jne	short sysvideo_19_2
  9989                              <1> sysvideo_19_1:
  9990 0000F910 A1[E00F0300]        <1> 	mov	eax, [LFB_Info+LFBINFO.LFB_addr]
  9991 0000F915 8B15[E40F0300]      <1> 	mov	edx, [LFB_Info+LFBINFO.LFB_size]
  9992 0000F91B EB8D                <1> 	jmp	sysvideo_17_5
  9993                              <1> sysvideo_19_2:
  9994 0000F91D E84A3FFFFF          <1> 	call	_vbe_biosfn_return_mode_info
  9995 0000F922 73EC                <1> 	jnc	short sysvideo_19_1
  9996 0000F924 E946D4FFFF          <1> 	jmp	sysret
  9997                              <1> 
  9998                              <1> sysvideo_20_1:
  9999                              <1> 	; cx = vesa video mode
 10000 0000F929 6689C8              <1> 	mov	ax, cx
 10001 0000F92C 663D0001            <1> 	cmp	ax, 100h
 10002 0000F930 725C                <1> 	jb	short sysvideo_20_0 ; VGA/CGA mode
 10003 0000F932 663DFF01            <1> 	cmp	ax, 1FFh
 10004                              <1> 	;ja	short sysvideo_20_4 ; not valid
 10005 0000F936 773E                <1> 	ja	short sysvideo_20_3
 10006 0000F938 50                  <1> 	push	eax
 10007 0000F939 6689C3              <1> 	mov	bx, ax
 10008 0000F93C 66B8024F            <1> 	mov	ax, 4F02h
 10009                              <1> 
 10010                              <1> 	; simulate _int10h (int 31h) for func 4F02h
 10011                              <1> 	;pushfd
 10012                              <1> 	;push	cs
 10013                              <1> 	;push	sysvideo_20_1_retn 
 10014                              <1> 	;push	es ; *
 10015                              <1> 	;push	ds ; **	; SAVE WORK AND PARAMETER REGISTERS
 10016                              <1> 	;jmp	VBE_func
 10017                              <1> ;sysvideo_20_1_retn:	
 10018                              <1> 	
 10019 0000F940 E8BB1DFFFF          <1> 	call	_int10h ; simulate int 10h (int 31h)
 10020                              <1> 
 10021 0000F945 6683F84F            <1> 	cmp	ax, 004Fh
 10022 0000F949 58                  <1> 	pop	eax
 10023 0000F94A 752A                <1> 	jne	short sysvideo_20_3 ; error
 10024                              <1> 	;pop	eax
 10025 0000F94C 40                  <1> 	inc	eax
 10026 0000F94D A3[1C010300]        <1> 	mov	[u.r0], eax ; video mode + 1
 10027 0000F952 09D2                <1> 	or	edx, edx ; is LFBINFO requested by user ?	
 10028                              <1> 	;jz	short sysvideo_20_4
 10029 0000F954 7420                <1> 	jz	short sysvideo_20_3 ; no
 10030                              <1> 
 10031                              <1> 	; 11/12/2020
 10032                              <1> 	; Check LFBINFO table/structure
 10033                              <1> 	; (it is set by vbe2 'vbe_biosfn_set_mode'
 10034                              <1> 	; but if vbe3 vbios pmi is in use,
 10035                              <1> 	; it will not set LFBINFO table)
 10036                              <1> 
 10037 0000F956 52                  <1> 	push	edx
 10038 0000F957 48                  <1> 	dec	eax  ; video mode
 10039 0000F958 BE[DE0F0300]        <1> 	mov	esi, LFB_Info
 10040 0000F95D 663B06              <1> 	cmp	ax, [esi+LFBINFO.mode]
 10041 0000F960 7407                <1> 	je	short sysvideo_20_2
 10042                              <1> 
 10043 0000F962 E8053FFFFF          <1> 	call	_vbe_biosfn_return_mode_info
 10044                              <1> 	;jnc	short sysvideo_20_2
 10045 0000F967 723B                <1> 	jc	short sysvideo_20_4 ; edx = 0	
 10046                              <1> 
 10047                              <1> 	;; clear LFBINFO table for invalidating	
 10048                              <1> 	;mov	ecx, LFBINFO.size ; 16
 10049                              <1> 	;mov	edi, esi ; LFB_Info table address
 10050                              <1> 	;xor	eax, eax
 10051                              <1> 	;rep	stosb
 10052                              <1> 
 10053                              <1> sysvideo_20_2:
 10054                              <1> 	;pop	ecx
 10055                              <1> 	;mov	edi, ecx ; user buffer
 10056 0000F969 5F                  <1> 	pop	edi
 10057 0000F96A B910000000          <1> 	mov	ecx, LFBINFO.size ; 16
 10058 0000F96F E835140000          <1> 	call	transfer_to_user_buffer ; fast transfer
 10059 0000F974 722F                <1> 	jc	short sysvideo_20_5
 10060                              <1> 	
 10061                              <1> 	;jmp	sysret
 10062                              <1> sysvideo_20_3:	
 10063                              <1> 	;pop	eax ; [u.r0] = 0		
 10064                              <1> ;sysvideo_20_4:
 10065 0000F976 E9F4D3FFFF          <1> 	jmp	sysret
 10066                              <1> 
 10067                              <1> 	; 23/07/2022
 10068                              <1> sysvideo_20:
 10069                              <1> 	; 11/12/2020
 10070                              <1> 	; 23/11/2020
 10071 0000F97B 80FF08              <1> 	cmp	bh, 8
 10072                              <1> 	; 08/08/2022
 10073                              <1> 	;jb	short sysvideo_19 ; video mode & lfb info
 10074 0000F97E 7407                <1> 	je	short sysvideo_20_6
 10075                              <1> 	; 23/07/2022
 10076 0000F980 7733                <1> 	ja	short sysvideo_21 ; 12/12/2020
 10077                              <1> 	; 08/08/2022 - jb
 10078 0000F982 E967FFFFFF          <1> 	jmp	sysvideo_19 
 10079                              <1> sysvideo_20_6:
 10080                              <1> 	; BH = 8
 10081                              <1> 	; Set (Super/Extended VGA) mode & return LFB info
 10082                              <1> 
 10083                              <1> 	; 11/12/2020
 10084 0000F987 80FBFF              <1> 	cmp	bl, 0FFh  ; CGA/VGA mode ?
 10085 0000F98A 739D                <1> 	jnb	short sysvideo_20_1
 10086                              <1> 
 10087                              <1> 	;xor	ah, ah
 10088 0000F98C 88D8                <1> 	mov	al, bl
 10089                              <1> sysvideo_20_0:
 10090 0000F98E E86D1DFFFF          <1> 	call	_int10h  ; uses vbe3 pmi32 option
 10091 0000F993 83F8FF              <1> 	cmp	eax, 0FFFFFFFFh ; -1
 10092 0000F996 74DE                <1> 	je	short sysvideo_20_3 ; error
 10093                              <1> 	
 10094                              <1> 	; 11/12/2020
 10095                              <1> 	; alternative (it does not use vbe3 pmi32)
 10096                              <1> 	;push	eax
 10097                              <1> 	;call	_set_mode
 10098                              <1> 	;pop	eax
 10099                              <1> 	;jc	short sysvideo_20_3
 10100                              <1> 	
 10101                              <1> 	;inc	eax
 10102 0000F998 FEC0                <1> 	inc	al
 10103                              <1> 	;mov	[u.r0], ax ; video mode + 1	
 10104 0000F99A A2[1C010300]        <1> 	mov	[u.r0], al
 10105 0000F99F E9CBD3FFFF          <1> 	jmp	sysret
 10106                              <1> 
 10107                              <1> sysvideo_20_4:
 10108 0000F9A4 5A                  <1> 	pop	edx
 10109                              <1> sysvideo_20_5:
 10110 0000F9A5 31D2                <1> 	xor	edx, edx ; 0
 10111                              <1> 	; edx = 0 -> invalid LFBINFO data
 10112 0000F9A7 8B2D[18010300]      <1> 	mov	ebp, [u.usp]  ; ebp points to user's registers
 10113 0000F9AD 895514              <1> 	mov	[ebp+20], edx ; return to user with EDX value 
 10114 0000F9B0 E9BAD3FFFF          <1> 	jmp	sysret
 10115                              <1> 
 10116                              <1> sysvideo_21:
 10117                              <1> 	; 23/07/2022
 10118                              <1> 	; 04/01/2021
 10119                              <1> 	; 03/12/2020
 10120 0000F9B5 80FF0A              <1> 	cmp	bh, 10
 10121                              <1> 	;jb	sysvideo_22 ; VESA VBE3 pmi parms
 10122                              <1> 	; 23/07/2022
 10123 0000F9B8 723F                <1> 	jb	short sysvideo_21_19
 10124                              <1> 	; 23/12/2020
 10125                              <1> 	;je	sysvideo_26 ; Video memory mapping	
 10126                              <1> 	; 23/07/2022
 10127 0000F9BA 7442                <1> 	je	short sysvideo_21_20
 10128                              <1> 	
 10129                              <1> 	; 04/01/2020
 10130 0000F9BC 80FF0B              <1> 	cmp	bh, 11
 10131                              <1> 	;ja	sysvideo_27
 10132                              <1> 	; 23/07/2022
 10133 0000F9BF 7742                <1> 	ja	short sysvideo_21_21
 10134                              <1> 		
 10135                              <1> 	; BH = 11
 10136                              <1> 	; set/read DAC color registers (for 8bpp)
 10137                              <1> 	
 10138 0000F9C1 80FB04              <1> 	cmp	bl, 4
 10139                              <1> 	;jnb	sysvideo_21_7	; BMP file type palette
 10140                              <1> 				; handling
 10141                              <1> 	; 23/07/2022
 10142                              <1> 	;jnb	short sysvideo_21_7
 10143                              <1> 	; 08/08/2022
 10144 0000F9C4 7205                <1> 	jb	short sysvideo_21_18
 10145 0000F9C6 E989000000          <1> 	jmp	sysvideo_21_7
 10146                              <1> sysvideo_21_18:	
 10147 0000F9CB F6C301              <1> 	test	bl, 1
 10148 0000F9CE 7563                <1> 	jnz	short sysvideo_21_4 ; set/write DAC colors
 10149                              <1> 		
 10150                              <1> 	; Read DAC color register or all DAC color registers
 10151 0000F9D0 F6C302              <1> 	test	bl, 2  ; read single DAC color register
 10152 0000F9D3 7433                <1> 	jz	short sysvideo_21_2 ; read all DAC color regs	
 10153                              <1> 
 10154                              <1> 	; read single DAC color register
 10155                              <1> 	; CL = DAC color register (index)
 10156                              <1>  	
 10157 0000F9D5 66BAC703            <1> 	mov	dx, 3C7h ; VGAREG_DAC_READ_ADDRESS
 10158 0000F9D9 88C8                <1> 	mov	al, cl	; DAC color register
 10159 0000F9DB 31C9                <1> 	xor	ecx, ecx ; (this may not be necessary)
 10160 0000F9DD EE                  <1> 	out	dx, al
 10161                              <1> 	;mov	dx, 3C9h ; VGAREG_DAC_DATA
 10162 0000F9DE B2C9                <1> 	mov	dl, 0C9h
 10163 0000F9E0 EC                  <1> 	in	al, dx
 10164 0000F9E1 88C4                <1> 	mov	ah, al	; red
 10165 0000F9E3 EC                  <1> 	in	al, dx
 10166 0000F9E4 88C1                <1> 	mov	cl, al	; green
 10167 0000F9E6 EC                  <1> 	in	al, dx
 10168 0000F9E7 88C5                <1> 	mov	ch, al	; blue
 10169 0000F9E9 C1E108              <1> 	shl	ecx, 8
 10170 0000F9EC 88E1                <1> 	mov	cl, ah	; red	
 10171                              <1> 	; CL = Red, CH = Green, byte 3 = Blue, byte 4 = 0
 10172                              <1> sysvideo_21_0:
 10173 0000F9EE 890D[1C010300]      <1> 	mov	[u.r0], ecx
 10174                              <1> sysvideo_21_1:
 10175 0000F9F4 E976D3FFFF          <1> 	jmp	sysret
 10176                              <1> sysvideo_21_19:
 10177                              <1> 	; 23/07/2022
 10178 0000F9F9 E97A010000          <1> 	jmp	sysvideo_22
 10179                              <1> sysvideo_21_20:
 10180                              <1> 	; 23/07/2022
 10181 0000F9FE E930020000          <1> 	jmp	sysvideo_26
 10182                              <1> sysvideo_21_21:
 10183                              <1> 	; 23/07/2022
 10184 0000FA03 E9B6020000          <1> 	jmp	sysvideo_27
 10185                              <1> sysvideo_21_2:
 10186                              <1> 	; read all DAC color registers
 10187 0000FA08 89CB                <1> 	mov	ebx, ecx ; user's buffer address
 10188 0000FA0A BF00600900          <1> 	mov	edi, VBE3STACKADDR
 10189 0000FA0F 89FE                <1> 	mov	esi, edi
 10190                              <1> 	;mov	ecx, 768 ; 256*3
 10191                              <1> 	; 08/08/2022
 10192 0000FA11 29C9                <1> 	sub	ecx, ecx
 10193 0000FA13 B503                <1> 	mov	ch, 3
 10194                              <1> 	; ecx = 768 = 300h
 10195                              <1> 	;push	ecx
 10196 0000FA15 66BAC703            <1> 	mov	dx, 3C7h ; VGAREG_DAC_READ_ADDRESS
 10197 0000FA19 28C0                <1> 	sub	al, al ; 0
 10198 0000FA1B EE                  <1> 	out	dx, al
 10199                              <1> 	;mov	dx, 3C9h ; VGAREG_DAC_DATA
 10200 0000FA1C B2C9                <1> 	mov	dl, 0C9h
 10201                              <1> sysvideo_21_3:
 10202 0000FA1E EC                  <1> 	in	al, dx
 10203 0000FA1F AA                  <1> 	stosb
 10204 0000FA20 EC                  <1> 	in	al, dx
 10205 0000FA21 AA                  <1> 	stosb
 10206 0000FA22 EC                  <1> 	in	al, dx
 10207 0000FA23 AA                  <1> 	stosb
 10208 0000FA24 E2F8                <1> 	loop	sysvideo_21_3
 10209                              <1> 	;pop	ecx
 10210                              <1> 	; 18/08/2022
 10211 0000FA26 B503                <1> 	mov	ch, 3
 10212                              <1> 	; ecx = 768 = 300h
 10213                              <1> 
 10214 0000FA28 89DF                <1> 	mov	edi, ebx ; user's buffer address
 10215                              <1> 	;mov	esi, VBE3STACKADDR
 10216                              <1> 	;mov	ecx, 256*3 = 768
 10217 0000FA2A E87A130000          <1> 	call	transfer_to_user_buffer
 10218 0000FA2F 72C3                <1> 	jc	short sysvideo_21_1
 10219                              <1> 	;mov	[u.r0], ecx ; actual transfer count
 10220 0000FA31 EBBB                <1> 	jmp	short sysvideo_21_0
 10221                              <1> 
 10222                              <1> sysvideo_21_4:
 10223                              <1> 	; Set/Write DAC color register or all registers
 10224 0000FA33 F6C302              <1> 	test	bl, 2 ; write/set single DAC color register
 10225 0000FA36 7456                <1> 	jz	short sysvideo_21_5 ; set all DAC color regs
 10226                              <1> 
 10227                              <1> 	; set single DAC color register
 10228                              <1> 	; CL = DAC color register (index)
 10229                              <1> 	; (byte 1 = Red, byte 2 = Green, byte 3 = Blue) 
 10230                              <1> 
 10231 0000FA38 66BAC803            <1> 	mov	dx, 3C8h ; VGAREG_DAC_WRITE_ADDRESS
 10232 0000FA3C 89C8                <1> 	mov	eax, ecx ; DAC color register (index)
 10233 0000FA3E C1E910              <1> 	shr	ecx, 16  ; CL = green, AH = Red
 10234 0000FA41 EE                  <1> 	out	dx, al
 10235                              <1> 	;mov	dx, 3C9h ; VGAREG_DAC_DATA
 10236 0000FA42 FEC2                <1> 	inc	dl
 10237 0000FA44 88E0                <1> 	mov	al, ah	; Red
 10238 0000FA46 EE                  <1> 	out	dx, al
 10239 0000FA47 88C8                <1> 	mov	al, cl	; Green
 10240 0000FA49 EE                  <1> 	out	dx, al
 10241 0000FA4A 88E8                <1> 	mov	al, ch	; Blue
 10242 0000FA4C EE                  <1> 	out	dx, al	
 10243                              <1> 	;rol	ecx, 8
 10244 0000FA4D C1E108              <1> 	shl	ecx, 8	; 21/02/2021
 10245 0000FA50 88E1                <1> 	mov	cl, ah	; Red
 10246                              <1> 		; ecx = 00BBGGRRh	
 10247 0000FA52 EB9A                <1> 	jmp	short sysvideo_21_0
 10248                              <1> 
 10249                              <1> 	; 23/07/2022
 10250                              <1> sysvideo_21_7:	
 10251                              <1> 	; BMP file type palette handling	
 10252                              <1> 	
 10253 0000FA54 F6C301              <1> 	test	bl, 1
 10254                              <1> 	;jnz	short sysvideo_21_12 ; set/write DAC colors
 10255                              <1> 	; 08/08/2022
 10256 0000FA57 7405                <1> 	jz	short sysvideo_21_16
 10257 0000FA59 E9A3000000          <1> 	jmp	sysvideo_21_12
 10258                              <1> 
 10259                              <1> sysvideo_21_16:		
 10260                              <1> 	; Read DAC color register or all DAC color registers
 10261 0000FA5E F6C302              <1> 	test	bl, 2  ; read single DAC color register
 10262 0000FA61 7460                <1> 	jz	short sysvideo_21_10 ; read all DAC color regs	
 10263                              <1> 
 10264                              <1> 	; read single DAC color register
 10265                              <1> 	; CL = DAC color register (index)
 10266                              <1>  	
 10267 0000FA63 66BAC703            <1> 	mov	dx, 3C7h ; VGAREG_DAC_READ_ADDRESS
 10268 0000FA67 88C8                <1> 	mov	al, cl	; DAC color register
 10269 0000FA69 31C9                <1> 	xor	ecx, ecx
 10270 0000FA6B EE                  <1> 	out	dx, al
 10271                              <1> 	;mov	dx, 3C9h ; VGAREG_DAC_DATA
 10272 0000FA6C B2C9                <1> 	mov	dl, 0C9h
 10273 0000FA6E EC                  <1> 	in	al, dx
 10274 0000FA6F C0E002              <1> 	shl	al, 2
 10275 0000FA72 88C5                <1> 	mov	ch, al	; red
 10276 0000FA74 EC                  <1> 	in	al, dx
 10277 0000FA75 C0E002              <1> 	shl	al, 2
 10278 0000FA78 88C1                <1> 	mov	cl, al	; green
 10279 0000FA7A EC                  <1> 	in	al, dx
 10280 0000FA7B C0E002              <1> 	shl	al, 2
 10281                              <1> 	; 21/02/2021
 10282 0000FA7E C1E108              <1> 	shl	ecx, 8
 10283 0000FA81 88C1                <1> 	mov	cl, al	; blue
 10284                              <1> 	; CL = Blue, CH = Green, byte 3 = Red, byte 4 = 0
 10285                              <1> sysvideo_21_8:
 10286 0000FA83 890D[1C010300]      <1> 	mov	[u.r0], ecx
 10287                              <1> sysvideo_21_9:
 10288 0000FA89 E9E1D2FFFF          <1> 	jmp	sysret
 10289                              <1> 
 10290                              <1> sysvideo_21_5:
 10291                              <1> 	; write/set all DAC color registers
 10292 0000FA8E 89CE                <1> 	mov	esi, ecx ; user's buffer address
 10293 0000FA90 BF00600900          <1> 	mov	edi, VBE3STACKADDR
 10294 0000FA95 89FB                <1> 	mov	ebx, edi
 10295 0000FA97 B900030000          <1> 	mov	ecx, 768 ; 256*3
 10296 0000FA9C E852130000          <1> 	call	transfer_from_user_buffer
 10297                              <1> 	;jc	short sysvideo_21_1
 10298                              <1> 	; 08/08/2022
 10299 0000FAA1 7305                <1> 	jnc	short sysvideo_21_17
 10300 0000FAA3 E94CFFFFFF          <1> 	jmp	sysvideo_21_1
 10301                              <1> sysvideo_21_17:
 10302 0000FAA8 890D[1C010300]      <1> 	mov	[u.r0], ecx ; actual transfer count
 10303                              <1> 
 10304 0000FAAE 89DE                <1> 	mov	esi, ebx ; VBE3STACKADDR
 10305 0000FAB0 66BAC803            <1> 	mov	dx, 3C8h ; VGAREG_DAC_WRITE_ADDRESS
 10306 0000FAB4 28C0                <1> 	sub	al, al ; 0
 10307 0000FAB6 EE                  <1> 	out	dx, al
 10308                              <1> 	;mov	dx, 3C9h ; VGAREG_DAC_DATA
 10309 0000FAB7 FEC2                <1> 	inc	dl
 10310                              <1> sysvideo_21_6:
 10311 0000FAB9 AC                  <1> 	lodsb
 10312 0000FABA EE                  <1> 	out	dx, al
 10313 0000FABB AC                  <1> 	lodsb
 10314 0000FABC EE                  <1> 	out	dx, al
 10315 0000FABD AC                  <1> 	lodsb
 10316 0000FABE EE                  <1> 	out	dx, al
 10317 0000FABF E2F8                <1> 	loop	sysvideo_21_6
 10318 0000FAC1 EBC6                <1> 	jmp	short sysvideo_21_9
 10319                              <1> 
 10320                              <1> sysvideo_21_10:
 10321                              <1> 	; read all DAC color registers
 10322 0000FAC3 89CD                <1> 	mov	ebp, ecx ; user's buffer address
 10323 0000FAC5 BF00600900          <1> 	mov	edi, VBE3STACKADDR
 10324 0000FACA 89FE                <1> 	mov	esi, edi
 10325 0000FACC B900040000          <1> 	mov	ecx, 1024 ; 256*4
 10326 0000FAD1 51                  <1> 	push	ecx
 10327 0000FAD2 66BAC703            <1> 	mov	dx, 3C7h ; VGAREG_DAC_READ_ADDRESS
 10328 0000FAD6 28C0                <1> 	sub	al, al ; 0
 10329 0000FAD8 EE                  <1> 	out	dx, al
 10330                              <1> 	;mov	dx, 3C9h ; VGAREG_DAC_DATA
 10331 0000FAD9 B2C9                <1> 	mov	dl, 0C9h
 10332                              <1> sysvideo_21_11:
 10333 0000FADB 31DB                <1> 	xor	ebx, ebx
 10334 0000FADD EC                  <1> 	in	al, dx	; Red
 10335 0000FADE C0E002              <1> 	shl	al, 2
 10336 0000FAE1 88C7                <1> 	mov	bh, al
 10337 0000FAE3 EC                  <1> 	in	al, dx	; Green
 10338 0000FAE4 C0E002              <1> 	shl	al, 2
 10339 0000FAE7 88C3                <1> 	mov	bl, al
 10340 0000FAE9 EC                  <1> 	in	al, dx	; Blue
 10341 0000FAEA C0E002              <1> 	shl	al, 2
 10342 0000FAED C1E308              <1> 	shl	ebx, 8
 10343 0000FAF0 89D8                <1> 	mov	eax, ebx ; 00RRGGBBh
 10344 0000FAF2 AB                  <1> 	stosd	
 10345 0000FAF3 E2E6                <1> 	loop	sysvideo_21_11
 10346 0000FAF5 59                  <1> 	pop	ecx
 10347                              <1> 
 10348 0000FAF6 89EF                <1> 	mov	edi, ebp ; user's buffer address
 10349                              <1> 	;mov	esi, VBE3STACKADDR
 10350                              <1> 	;mov	ecx, 1024 = 4*256
 10351 0000FAF8 E8AC120000          <1> 	call	transfer_to_user_buffer
 10352 0000FAFD 728A                <1> 	jc	short sysvideo_21_9
 10353                              <1> 	;mov	[u.r0], ecx ; actual transfer count
 10354 0000FAFF EB82                <1> 	jmp	short sysvideo_21_8
 10355                              <1> 
 10356                              <1> sysvideo_21_12:
 10357                              <1> 	; Set/Write DAC color register or all registers
 10358 0000FB01 F6C302              <1> 	test	bl, 2 ; write/set single DAC color register
 10359 0000FB04 742A                <1> 	jz	short sysvideo_21_13 ; set all DAC color regs
 10360                              <1> 
 10361                              <1> 	; set single DAC color register
 10362                              <1> 	; CL = DAC color register (index)
 10363                              <1> 	; (byte 1 = Blue, byte 2 = Green, byte 3 = Red) 
 10364                              <1> 
 10365 0000FB06 66BAC803            <1> 	mov	dx, 3C8h ; VGAREG_DAC_WRITE_ADDRESS
 10366 0000FB0A 88C8                <1> 	mov	al, cl	; DAC color register (index)
 10367 0000FB0C 88EC                <1> 	mov	ah, ch	; Blue 
 10368 0000FB0E C1E910              <1> 	shr	ecx, 16
 10369 0000FB11 EE                  <1> 	out	dx, al
 10370                              <1> 	;mov	dx, 3C9h ; VGAREG_DAC_DATA
 10371 0000FB12 FEC2                <1> 	inc	dl
 10372 0000FB14 88E8                <1> 	mov	al, ch	; Red
 10373 0000FB16 C0E802              <1> 	shr	al, 2
 10374 0000FB19 EE                  <1> 	out	dx, al
 10375 0000FB1A 88C8                <1> 	mov	al, cl	; Green
 10376 0000FB1C C0E802              <1> 	shr	al, 2
 10377 0000FB1F EE                  <1> 	out	dx, al
 10378 0000FB20 88E0                <1> 	mov	al, ah	; Blue
 10379 0000FB22 C0E802              <1> 	shr	al, 2
 10380 0000FB25 EE                  <1> 	out	dx, al	
 10381                              <1> 	;rol	ecx, 8
 10382 0000FB26 C1E108              <1> 	shl	ecx, 8 ; 21/02/2021 
 10383 0000FB29 88E1                <1> 	mov	cl, ah
 10384 0000FB2B E953FFFFFF          <1> 	jmp	sysvideo_21_8 ; 08/08/2022
 10385                              <1> 
 10386                              <1> sysvideo_21_13:
 10387                              <1> 	; write/set all DAC color registers
 10388 0000FB30 89CE                <1> 	mov	esi, ecx ; user's buffer address
 10389 0000FB32 BF00600900          <1> 	mov	edi, VBE3STACKADDR
 10390 0000FB37 89FB                <1> 	mov	ebx, edi
 10391 0000FB39 B900040000          <1> 	mov	ecx, 1024 ; 256*4
 10392 0000FB3E E8B0120000          <1> 	call	transfer_from_user_buffer
 10393 0000FB43 722E                <1> 	jc	short sysvideo_21_15
 10394 0000FB45 890D[1C010300]      <1> 	mov	[u.r0], ecx ; actual transfer count
 10395                              <1> 
 10396 0000FB4B 89DE                <1> 	mov	esi, ebx ; VBE3STACKADDR
 10397 0000FB4D 66BAC803            <1> 	mov	dx, 3C8h ; VGAREG_DAC_WRITE_ADDRESS
 10398 0000FB51 28C0                <1> 	sub	al, al ; 0
 10399 0000FB53 EE                  <1> 	out	dx, al
 10400                              <1> 	;mov	dx, 3C9h ; VGAREG_DAC_DATA
 10401 0000FB54 FEC2                <1> 	inc	dl
 10402                              <1> sysvideo_21_14:
 10403 0000FB56 AD                  <1> 	lodsd
 10404                              <1> 	; byte 0 = Blue, byte 1 = Green, byte 2 = Red
 10405                              <1> 	; 21/02/2021
 10406 0000FB57 89C3                <1> 	mov	ebx, eax ; BL = Blue, BH = Green
 10407 0000FB59 C1CB08              <1> 	ror	ebx, 8 ; BL = Green, BH = Red
 10408 0000FB5C 88F8                <1> 	mov	al, bh
 10409 0000FB5E C0E802              <1> 	shr	al, 2
 10410 0000FB61 EE                  <1> 	out	dx, al ; Red
 10411 0000FB62 88D8                <1> 	mov	al, bl
 10412 0000FB64 C0E802              <1> 	shr	al, 2	
 10413 0000FB67 EE                  <1> 	out	dx, al ; Green
 10414 0000FB68 C1C308              <1> 	rol	ebx, 8 ; BL = Blue
 10415 0000FB6B 88D8                <1> 	mov	al, bl
 10416 0000FB6D C0E802              <1> 	shr	al, 2
 10417 0000FB70 EE                  <1> 	out	dx, al ; Blue 
 10418 0000FB71 E2E3                <1> 	loop	sysvideo_21_14
 10419                              <1> sysvideo_21_15:
 10420 0000FB73 E9F7D1FFFF          <1> 	jmp	sysret
 10421                              <1> 
 10422                              <1> sysvideo_22:
 10423                              <1> 	; 28/02/2021
 10424                              <1> 	; 22/01/2021
 10425                              <1> 	; 17/01/2021
 10426                              <1> 	; 04/12/2020
 10427                              <1> 	; 03/12/2020
 10428                              <1> 	; BH = 9
 10429                              <1> 	; Set/Get VESA VBE3 protected mode interface params
 10430                              <1> 
 10431                              <1> 	; 22/01/2021
 10432                              <1> 	;cmp	byte [vbe3], 3
 10433                              <1> 	;jne	short sysvideo_25 ; not applicable if
 10434                              <1> 				; vbe3 compatible video bios
 10435                              <1> 				; is not detected by kernel	
 10436 0000FB78 80FB02              <1> 	cmp	bl, 2
 10437                              <1> 	;ja	short sysvideo_25 ; bl > 2 not implemented
 10438                              <1> 	; 17/01/2021
 10439 0000FB7B 7716                <1> 	ja	short sysvideo_22_0 ; srvs flag sub function
 10440                              <1> 	;jb	short sysvideo_23
 10441                              <1> 
 10442                              <1> 	; 21/01/2021
 10443 0000FB7D 803D[64090000]03    <1> 	cmp	byte [vbe3], 3
 10444                              <1> 	;jne	short sysvideo_25 ; not applicable if
 10445                              <1> 				; vbe3 compatible video bios
 10446                              <1> 				; is not detected by kernel
 10447 0000FB84 75ED                <1> 	jne	short sysvideo_21_15 ; 28/02/2021
 10448                              <1> 	
 10449 0000FB86 80FB01              <1> 	cmp	bl, 1
 10450 0000FB89 7673                <1> 	jna	short sysvideo_23
 10451                              <1> 
 10452 0000FB8B 8A1D[D00F0300]      <1> 	mov	bl, [pmi32] ; Video bios 32 bit PMI functions
 10453 0000FB91 EB78                <1> 	jmp	short sysvideo_24
 10454                              <1> 
 10455                              <1> sysvideo_22_0:
 10456                              <1> 	; 17/01/2021
 10457                              <1> 	; save/restore video state user permission
 10458 0000FB93 80FB05              <1> 	cmp	bl, 5
 10459 0000FB96 771E                <1> 	ja	short sysvideo_22_2
 10460 0000FB98 7208                <1> 	jb	short sysvideo_22_1
 10461                              <1> 	; get srvs flag value/status
 10462 0000FB9A 8A1D[34100300]      <1> 	mov	bl, [srvsf] ; 0 = disabled, 1 = enabled
 10463 0000FBA0 EB2C                <1> 	jmp	short sysvideo_22_3
 10464                              <1> 
 10465                              <1> sysvideo_22_1:
 10466                              <1> 	; permission (root and multi tasking) check
 10467 0000FBA2 E836000000          <1> 	call	sysvideo_22_4
 10468 0000FBA7 736A                <1> 	jnc	short sysvideo_25 ; not permitted !
 10469                              <1> 	; cf = 1
 10470 0000FBA9 80EB03              <1> 	sub	bl, 3 ; disable = 0, enable = 1
 10471                              <1> 	; 22/01/2021
 10472 0000FBAC 881D[34100300]      <1> 	mov	[srvsf], bl
 10473 0000FBB2 FEC3                <1> 	inc	bl ; 1 = disabled, 2 = enabled
 10474 0000FBB4 EB18                <1> 	jmp	short sysvideo_22_3
 10475                              <1> 
 10476                              <1> sysvideo_22_2:
 10477 0000FBB6 80FB06              <1> 	cmp	bl, 6
 10478                              <1> 	;ja	short sysvideo_25 ; invalid/unimplemented
 10479                              <1> 	; 28/02/2021
 10480 0000FBB9 7733                <1> 	ja	short sysvideo_22_6
 10481                              <1> 	; get VESA VBE number/status
 10482 0000FBBB 8A25[64090000]      <1> 	mov	ah, [vbe3] ; vbe3 = 3, vbe2 = 2, others = 0
 10483 0000FBC1 A0[65090000]        <1> 	mov	al, [vbe2bios] ; bochs/qemu/vbox emulator status
 10484 0000FBC6 66A3[1C010300]      <1> 	mov	[u.r0], ax
 10485 0000FBCC EB45                <1> 	jmp	short sysvideo_25
 10486                              <1> 
 10487                              <1> sysvideo_22_3:
 10488                              <1> 	; 22/01/2021
 10489 0000FBCE 8A3D[35100300]      <1> 	mov	bh, [srvso] ; state options (> 80h -> svga)
 10490 0000FBD4 66891D[1C010300]    <1> 	mov	[u.r0], bx ; function result is return value 
 10491 0000FBDB EB36                <1> 	jmp	short sysvideo_25 
 10492                              <1> 
 10493                              <1> sysvideo_22_4:
 10494                              <1> 	; 17/01/2021 - permission will be given by root only
 10495 0000FBDD 803D[D6830100]00    <1> 	cmp	byte [multi_tasking], 0 ; in single user mode
 10496 0000FBE4 7707                <1> 	ja	short sysvideo_22_5
 10497                              <1> 	; 19/01/2021
 10498 0000FBE6 803D[6E010300]01    <1>  	cmp	byte [u.uid], 1 ; ([u.uid] = 0 -> root)
 10499                              <1> sysvideo_22_5:
 10500                              <1> 	; [multi_tasking] = 0 & [u.uid] = 0 -> CF = 1
 10501                              <1> 	; otherwise -> CF = 0 
 10502 0000FBED C3                  <1> 	retn
 10503                              <1> 
 10504                              <1> sysvideo_22_6:
 10505                              <1> 	; 28/02/2021
 10506 0000FBEE 80FB09              <1> 	cmp	bl, 9
 10507 0000FBF1 7720                <1> 	ja	short sysvideo_25 ; invalid/unimplemented
 10508 0000FBF3 7436                <1> 	je	short sysvideo_22_9
 10509 0000FBF5 80FB08              <1> 	cmp	bl, 8
 10510 0000FBF8 721E                <1> 	jb	short sysvideo_22_7
 10511                              <1> 
 10512                              <1> 	; BL = 8
 10513                              <1> 	; Set default true color bpp to 24
 10514                              <1> 
 10515 0000FBFA B318                <1> 	mov	bl, 24
 10516                              <1> 	;mov	[truecolor], al	; 24bpp (RRGGBBh)
 10517                              <1> 	;mov	[u.r0], al
 10518                              <1> 	;jmp	short sysvideo_25
 10519 0000FBFC EB25                <1> 	jmp	short sysvideo_22_8
 10520                              <1> 
 10521                              <1> sysvideo_23:
 10522                              <1> 	; 17/01/2021
 10523                              <1> 	; permission (root and multi tasking) check
 10524 0000FBFE E8DAFFFFFF          <1> 	call	sysvideo_22_4
 10525 0000FC03 730E                <1> 	jnc	short sysvideo_25 ; not permitted !
 10526                              <1> 
 10527 0000FC05 881D[D00F0300]      <1> 	mov	[pmi32], bl ; 1 = enabled, 0 = disabled 
 10528                              <1> sysvideo_24:
 10529 0000FC0B FEC3                <1> 	inc	bl
 10530                              <1> sysvideo_22_10:	; 28/02/2021
 10531 0000FC0D 881D[1C010300]      <1> 	mov	[u.r0], bl ; function result is return value 
 10532                              <1> sysvideo_25:
 10533 0000FC13 E957D1FFFF          <1> 	jmp	sysret
 10534                              <1> 
 10535                              <1> sysvideo_22_7:
 10536                              <1> 	; BL = 7
 10537                              <1> 	; Set default true color bpp to 32
 10538                              <1> 	; (it will set if [VBE3]=3)
 10539                              <1> 
 10540                              <1> 	; Note: This sub function is used to set 24bpp
 10541                              <1> 	; VESA VBE video modes to 32bpp.. because,
 10542                              <1> 	; old hardware uses 24 bpp but new video hardware
 10543                              <1> 	; uses 32bpp for same VESA VBE truecolor modes.
 10544                              <1> 	; (For example: VBE mode 112h is 640*480, 24bpp but
 10545                              <1> 	; new hardware uses/apply it as 640*480, 32bpp.)  	
 10546                              <1> 	; So, TRDOS 386 v2.0.3 kernel will check [truecolor]
 10547                              <1> 	; status is 32 bpp or not and it will change 24bpp
 10548                              <1> 	; to 32bpp if default [truecolor] value is 32, for
 10549                              <1> 	; same video mode number.
 10550                              <1> 
 10551 0000FC18 803D[64090000]03    <1> 	cmp	byte [vbe3], 3
 10552 0000FC1F 75F2                <1> 	jne	short sysvideo_25 ; Only applicable 
 10553                              <1> 				  ; for VBE3 video hardware!
 10554 0000FC21 B320                <1> 	mov	bl, 32
 10555                              <1> sysvideo_22_8:
 10556 0000FC23 881D[0B740100]      <1> 	mov	[truecolor], bl	; 32bpp (00RRGGBBh)
 10557                              <1> 	;mov	[u.r0], bl
 10558                              <1> 	;jmp	short sysvideo_25
 10559 0000FC29 EBE2                <1> 	jmp	short sysvideo_22_10
 10560                              <1> 
 10561                              <1> sysvideo_22_9:
 10562                              <1> 	; BL = 9
 10563                              <1> 	; Return default true color bpp
 10564 0000FC2B 8A1D[0B740100]      <1> 	mov	bl, [truecolor]
 10565 0000FC31 EBDA                <1> 	jmp	short sysvideo_22_10
 10566                              <1> ;sysvideo_22_10:
 10567                              <1> 	;mov	[u.r0], bl
 10568                              <1> 	;jmp	sysret
 10569                              <1> 
 10570                              <1> sysvideo_26:
 10571                              <1> 	; 23/12/2020
 10572                              <1> 	; BH = 10
 10573                              <1> 	; Map video memory to user's buffer
 10574                              <1> 	; (multiuser/owner r/w permisions are ignored
 10575                              <1> 	;  for current TRDOS 386 version !)
 10576                              <1> 
 10577 0000FC33 6681E100F0          <1> 	and	cx, ~4095  ; clear low 12 bits
 10578 0000FC38 09C9                <1> 	or	ecx, ecx ; start address of user's buffer
 10579 0000FC3A 74D7                <1> 	jz	short sysvideo_25 ; error !
 10580                              <1> 	
 10581 0000FC3C 80FB01              <1> 	cmp	bl, 1  ; VGA memory mapping ?
 10582 0000FC3F 740E                <1> 	je	short sysvideo_26_1
 10583 0000FC41 7718                <1> 	ja	short sysvideo_26_2
 10584                              <1> sysvideo_26_0:
 10585                              <1> 	; BL = 0 : CGA memory (0B8000h) map (32K)
 10586 0000FC43 B800800B00          <1> 	mov	eax, 0B8000h	
 10587 0000FC48 BB00800000          <1> 	mov	ebx, 32768
 10588 0000FC4D EB37                <1> 	jmp	short sysvideo_26_3
 10589                              <1> sysvideo_26_1:
 10590                              <1> 	; BL = 1 : VGA memory (0A0000h) map (64K)
 10591 0000FC4F B800000A00          <1> 	mov	eax, 0A0000h	
 10592 0000FC54 BB00000100          <1> 	mov	ebx, 65536
 10593 0000FC59 EB2B                <1> 	jmp	short sysvideo_26_3
 10594                              <1> sysvideo_26_2:
 10595                              <1> 	; BL = 2 : SVGA memory (LFB) map to user's buffer
 10596 0000FC5B 803D[64090000]02    <1> 	cmp	byte [vbe3], 2  ; VESA VBE 2/3 vbios ready ?
 10597 0000FC62 72AF                <1> 	jb	short sysvideo_25  ; no, error !
 10598 0000FC64 6681E200F0          <1> 	and	dx, ~4095 ; clear low 12 bits
 10599 0000FC69 09D2                <1> 	or	edx, edx  ; buffer size in bytes	
 10600 0000FC6B 74A6                <1> 	jz	short sysvideo_25  ; error
 10601 0000FC6D 89D3                <1> 	mov	ebx, edx
 10602 0000FC6F A1[E00F0300]        <1> 	mov	eax, [LFB_ADDR] ; [LFB_Info+LFBINFO.LFB_addr]
 10603 0000FC74 21C0                <1> 	and	eax, eax
 10604 0000FC76 7425                <1> 	jz	short sysvideo_26_5
 10605                              <1> 				; (LFB parms are not set yet)
 10606 0000FC78 3B1D[E40F0300]      <1> 	cmp	ebx, [LFB_SIZE] ; [LFB_Info+LFBINFO.LFB_size]
 10607 0000FC7E 7606                <1> 	jna	short sysvideo_26_3
 10608 0000FC80 8B1D[E40F0300]      <1> 	mov	ebx, [LFB_SIZE]
 10609                              <1> sysvideo_26_3: 
 10610 0000FC86 52                  <1> 	push	edx
 10611 0000FC87 53                  <1> 	push	ebx	; buffer size in bytes
 10612 0000FC88 51                  <1> 	push	ecx	; user's buffer address
 10613 0000FC89 87D9                <1> 	xchg	ebx, ecx
 10614 0000FC8B C1E90C              <1> 	shr	ecx, 12 ; convert buffer size to page count
 10615 0000FC8E E80362FFFF          <1> 	call	direct_memory_access
 10616 0000FC93 59                  <1> 	pop	ecx	; user's buffer address
 10617 0000FC94 5B                  <1> 	pop	ebx	; buffer size
 10618 0000FC95 5A                  <1> 	pop	edx
 10619                              <1> 	;jc	short sysvideo_25 ; error !
 10620                              <1> 				  ; [u.r0] = 0
 10621                              <1> 	; 28/02/2021
 10622 0000FC96 7235                <1> 	jc	short sysvideo_27_0 ; error !	
 10623                              <1> 
 10624                              <1> ;sysvideo_26_4:
 10625                              <1> 	;mov	ebp, [u.usp] ; ebp points to user's registers
 10626                              <1> 	;mov	[ebp+20], edx ; return to user with EDX value 
 10627                              <1> 	;mov	[ebp+16], ebx ; EBX
 10628                              <1> 	;mov	[ebp+24], ecx ; ECX
 10629                              <1> 	; eax = physical address of video memory (LFB)
 10630                              <1> 	;mov	[u.r0], eax
 10631                              <1> 	;jmp	sysret
 10632 0000FC98 E92CFCFFFF          <1> 	jmp	sysvideo_26_4
 10633                              <1> 
 10634                              <1> sysvideo_26_5:
 10635 0000FC9D 66A1[F60E0000]      <1> 	mov	ax, [def_LFB_addr] ; default LFB for mode 118h
 10636                              <1> 	; ah must be 0C0h or 0D0h or E0h
 10637                              <1> 	; others are nonsence !?
 10638 0000FCA3 08E4                <1>  	or	ah, ah
 10639                              <1> 	;jz	short sysvideo_25 ; invalid lfb addr or
 10640                              <1> 			  	; it is not a vbe2 -bochs emu- 
 10641                              <1> 			  	; or vbe3 -real- video bios
 10642                              <1> 	; 28/02/2021
 10643 0000FCA5 7426                <1> 	jz	short sysvideo_27_0 ; invalid LFB address
 10644                              <1>  
 10645 0000FCA7 80FCF0              <1> 	cmp	ah, 0F0h  
 10646                              <1> 	;jnb	short sysvideo_25 ; nonsence !?
 10647                              <1> 	; 28/02/2021
 10648 0000FCAA 7321                <1> 	jnb	short sysvideo_27_0 ; nonsence !?
 10649                              <1> 
 10650 0000FCAC C1E010              <1> 	shl	eax, 16
 10651                              <1> 	;jz	short sysvideo_25 ; eax = 0 
 10652                              <1> 
 10653 0000FCAF 81FB00907E00        <1> 	cmp	ebx, 1920*1080*4 ; maximum value of possible
 10654                              <1> 				 ; buffer sizes
 10655 0000FCB5 76CF                <1> 	jna	short sysvideo_26_3  ; buffer size is proper
 10656                              <1> 	; resize buffer to fit 4GB limit
 10657 0000FCB7 BB00907E00          <1> 	mov	ebx, 1920*1080*4
 10658 0000FCBC EBC8                <1> 	jmp	short sysvideo_26_3
 10659                              <1> 
 10660                              <1> sysvideo_27:
 10661                              <1> 	; 23/07/2022
 10662                              <1> 	; 16/02/2021
 10663                              <1> 	; 18/01/2021
 10664 0000FCBE 80FF0C              <1> 	cmp	bh, 12
 10665                              <1> 	;ja	sysvideo_28 ; 19/01/2021
 10666                              <1> 	; 23/07/2022
 10667 0000FCC1 7605                <1> 	jna	short sysvideo_27_24
 10668 0000FCC3 E970010000          <1> 	jmp	sysvideo_28
 10669                              <1> 
 10670                              <1> sysvideo_27_24:	; 23/07/2022
 10671                              <1> 	; BH = 12
 10672                              <1> 	; Font sub functions.
 10673                              <1> 	; 12/02/2021
 10674                              <1> 	; 11/01/2021
 10675                              <1> 	; 10/01/2021
 10676                              <1> 	;   BL = 0 : Disable system font overwrite
 10677                              <1> 	;   BL = 1 : Enable system font overwrite
 10678                              <1> 	;   BL = 2 : Read system font 8x8
 10679                              <1> 	;   BL = 3 : Read system font 8x14
 10680                              <1> 	;   BL = 4 : Read system font 8x16
 10681                              <1> 	;   BL = 5 : Read user defined font 8x8
 10682                              <1> 	;   BL = 6 : Read user defined font 8x16
 10683                              <1> 	;   BL = 7 : Write system font 8x8
 10684                              <1> 	;   BL = 8 : Write system font 8x14
 10685                              <1> 	;   BL = 9 : Write system font 8x16
 10686                              <1> 	;   BL = 10 : Write user defined font 8x8
 10687                              <1> 	;   BL = 11 : Write user defined font 8x16
 10688                              <1> 	;
 10689                              <1> 	;  BL > 11 : invalid (not implemented)
 10690                              <1> 	;
 10691                              <1> 	; For BL = 1 to 11
 10692                              <1> 	;   ECX = number of characters (<= 256)
 10693                              <1> 	;   EDX = first character (ascii code in DL)
 10694                              <1> 	;   ESI = user's buffer address
 10695                              <1> 	;
 10696                              <1> 	; Return: EAX = character count 
 10697                              <1> 
 10698 0000FCC8 80FB0B              <1> 	cmp	bl, 11
 10699 0000FCCB 7605                <1> 	jna	short sysvideo_27_1
 10700                              <1> sysvideo_27_0:
 10701 0000FCCD E99DD0FFFF          <1> 	jmp	sysret ; not implemented yet !		
 10702                              <1> sysvideo_27_1:
 10703 0000FCD2 66B80001            <1> 	mov	ax, 256
 10704 0000FCD6 08DB                <1> 	or	bl, bl
 10705 0000FCD8 750E                <1>  	jnz	short sysvideo_27_3
 10706                              <1> 	
 10707                              <1> 	; bl = 0
 10708                              <1> 	; disable system font overwrite 
 10709                              <1> 
 10710 0000FCDA 8025[32100300]7F    <1> 	and	byte [ufont], 7Fh ; clear bit 7
 10711                              <1> sysvideo_27_2:
 10712                              <1> 	;mov	word [u.r0], 256  ; > 0 -> successful
 10713 0000FCE1 A3[1C010300]        <1> 	mov	[u.r0], eax ; 256
 10714 0000FCE6 EBE5                <1> 	jmp	short sysvideo_27_0
 10715                              <1> sysvideo_27_3:
 10716 0000FCE8 80FB01              <1> 	cmp	bl, 1
 10717 0000FCEB 7710                <1> 	ja	short sysvideo_27_4
 10718                              <1> 
 10719                              <1> 	; bl = 1
 10720                              <1> 	; enable system font overwrite 
 10721                              <1> 	;	if [multi_tasking]= 0 and [u.uid] = 0
 10722                              <1> 
 10723                              <1> 	;cmp	byte [multi_tasking], 0 
 10724                              <1> 	;			; multi tasking enabled ?
 10725                              <1> 	;ja	short sysvideo_27_0 ; yes
 10726                              <1> 	;; 19/01/2021 
 10727                              <1> 	;; system maintenance or single user mode
 10728                              <1> 	;cmp	byte [u.uid], 0  ; root ?
 10729                              <1> 	;ja	short sysvideo_27_0 ; no
 10730                              <1> 
 10731                              <1> 	; 19/01/2021
 10732                              <1> 	; multi tasking & root check
 10733 0000FCED E8EBFEFFFF          <1> 	call	sysvideo_22_4
 10734 0000FCF2 73D9                <1> 	jnc	short sysvideo_27_0 ; not permitted
 10735                              <1> 
 10736                              <1> 	; [multi_tasking]= 0 and [u.uid] = 0
 10737                              <1> 
 10738 0000FCF4 800D[32100300]80    <1> 	or	byte [ufont], 80h ; set bit 7
 10739                              <1> 		
 10740 0000FCFB EBE4                <1>  	jmp	short sysvideo_27_2
 10741                              <1> 
 10742                              <1> sysvideo_27_4:
 10743 0000FCFD 09C9                <1> 	or	ecx, ecx
 10744 0000FCFF 74CC                <1> 	jz	short sysvideo_27_0
 10745 0000FD01 21D2                <1> 	and	edx, edx
 10746 0000FD03 7410                <1> 	jz	short sysvideo_27_4_0
 10747                              <1> 	;mov	ax, 256
 10748 0000FD05 39C1                <1> 	cmp	ecx, eax ; 256
 10749 0000FD07 77C4                <1> 	ja	short sysvideo_27_0
 10750 0000FD09 48                  <1> 	dec	eax
 10751 0000FD0A 39C2                <1> 	cmp	edx, eax ; 255
 10752 0000FD0C 77BF                <1> 	ja	short sysvideo_27_0
 10753 0000FD0E 40                  <1> 	inc	eax
 10754 0000FD0F 29D0                <1> 	sub	eax, edx ; 256 - DX
 10755 0000FD11 39C8                <1> 	cmp	eax, ecx
 10756 0000FD13 72B8                <1> 	jb	short sysvideo_27_0
 10757                              <1> 
 10758                              <1> sysvideo_27_4_0:
 10759 0000FD15 89F5                <1> 	mov	ebp, esi
 10760                              <1> 
 10761 0000FD17 80FB06              <1> 	cmp	bl, 6
 10762 0000FD1A 7768                <1> 	ja	short sysvideo_27_13
 10763 0000FD1C 7210                <1> 	jb	short sysvideo_27_5
 10764                              <1> 	; bl = 6
 10765 0000FD1E F605[32100300]10    <1> 	test	byte [ufont], 16 ; 8x16 user font loaded ?
 10766 0000FD25 74A6                <1> 	jz	short sysvideo_27_0
 10767                              <1> 	; read 8x16 user defined font
 10768 0000FD27 BE00400900          <1> 	mov	esi, VGAFONT16USER
 10769 0000FD2C EB0C                <1> 	jmp	short sysvideo_27_6
 10770                              <1> sysvideo_27_5:
 10771 0000FD2E 80FB04              <1> 	cmp	bl, 4
 10772 0000FD31 7239                <1> 	jb	short sysvideo_27_11
 10773 0000FD33 7721                <1> 	ja	short sysvideo_27_9
 10774                              <1> 	; bl = 4
 10775                              <1> 	; read 8x16 system font
 10776 0000FD35 BE[D8630100]        <1> 	mov	esi, vgafont16
 10777                              <1> sysvideo_27_6:
 10778                              <1> 	; read 8x16 font
 10779                              <1> 	;shl	dx, 4 ; * 16
 10780                              <1> 	;shl	cx, 4 ; * 16 ; 16 bytes per char
 10781                              <1> 	; 23/07/2022
 10782 0000FD3A C1E204              <1> 	shl	edx, 4 ; * 16
 10783 0000FD3D C1E104              <1> 	shl	ecx, 4 ; * 16
 10784                              <1> sysvideo_27_7:
 10785 0000FD40 89EF                <1> 	mov	edi, ebp
 10786                              <1> 	;add	edi, edx ; 16/02/2021
 10787 0000FD42 01D6                <1> 	add	esi, edx
 10788                              <1> 	; ecx = byte count
 10789                              <1> 	; esi = source (in system memory)
 10790                              <1> 	; edi = destination (in user memory)
 10791 0000FD44 E860100000          <1> 	call	transfer_to_user_buffer
 10792 0000FD49 7206                <1> 	jc	short sysvideo_27_8
 10793 0000FD4B 890D[1C010300]      <1> 	mov	[u.r0], ecx	
 10794                              <1> sysvideo_27_8:
 10795 0000FD51 E919D0FFFF          <1> 	jmp	sysret
 10796                              <1> sysvideo_27_9:
 10797                              <1> 	; bl = 5
 10798 0000FD56 F605[32100300]08    <1> 	test	byte [ufont], 8 ; 8x8 user font loaded ?
 10799 0000FD5D 74F2                <1> 	jz	short sysvideo_27_8
 10800                              <1> 	; read 8x8 user defined font
 10801 0000FD5F BE00500900          <1> 	mov	esi, VGAFONT8USER
 10802                              <1> sysvideo_27_10:
 10803                              <1> 	; read 8x8 font
 10804                              <1> 	;shl	dx, 3 ; * 8
 10805                              <1> 	;shl	cx, 3 ; * 8 ; 8 bytes per char
 10806                              <1> 	; 23/07/2022
 10807 0000FD64 C1E203              <1> 	shl	edx, 3 ; * 8
 10808 0000FD67 C1E103              <1> 	shl	ecx, 3 ; * 8
 10809 0000FD6A EBD4                <1> 	jmp	short sysvideo_27_7
 10810                              <1> 
 10811                              <1> sysvideo_27_11:
 10812 0000FD6C 80FB03              <1> 	cmp	bl, 3  ; 8x14 system font
 10813 0000FD6F 720C                <1> 	jb	short sysvideo_27_12 ; 8x8 system font
 10814                              <1> 	; bl = 3
 10815                              <1> 	; read 8x14 system font 
 10816                              <1> 	;mov	al, 14
 10817                              <1> 	;mul	dl
 10818                              <1> 	;mov	dx, ax
 10819                              <1> 	;push	edx
 10820                              <1> 	;mov	ax, 14
 10821                              <1> 	;mul	cx
 10822                              <1> 	;mov	cx, ax
 10823                              <1> 	;pop	edx
 10824 0000FD71 E8A5000000          <1> 	call	sysvideo_27_14
 10825 0000FD76 BE[D8550100]        <1> 	mov	esi, vgafont14
 10826 0000FD7B EBC3                <1> 	jmp	short sysvideo_27_7	
 10827                              <1> 	
 10828                              <1> sysvideo_27_12:
 10829                              <1> 	; bl = 2
 10830                              <1> 	; read 8x8 system font 
 10831 0000FD7D BE[D84D0100]        <1> 	mov	esi, vgafont8
 10832 0000FD82 EBE0                <1> 	jmp	short sysvideo_27_10
 10833                              <1> 
 10834                              <1> sysvideo_27_13:
 10835                              <1> 	; overwrite font
 10836 0000FD84 80FB0A              <1> 	cmp	bl, 10
 10837 0000FD87 776E                <1> 	ja	short sysvideo_27_22 ; 8x16 user font
 10838 0000FD89 7224                <1> 	jb	short sysvideo_27_15
 10839                              <1> 	; bl = 10
 10840 0000FD8B BF00500900          <1> 	mov	edi, VGAFONT8USER
 10841 0000FD90 F605[32100300]08    <1> 	test	byte [ufont], 8 ; 8x8 user font loaded ?
 10842 0000FD97 7556                <1> 	jnz	short sysvideo_27_21 ; yes
 10843 0000FD99 08ED                <1> 	or	ch, ch ; cx = 256
 10844                              <1> 	;jnz	short sysvideo_27_21 ; 256 chars
 10845 0000FD9B 7406                <1> 	jz	short sysvideo_27_13_0
 10846 0000FD9D 66B90008            <1> 	mov	cx, 8*256
 10847 0000FDA1 EB35                <1> 	jmp	short sysvideo_27_18_0
 10848                              <1> sysvideo_27_13_0:
 10849                              <1> 	; copy system font to user font before overwrite
 10850 0000FDA3 BE[D84D0100]        <1> 	mov	esi, vgafont8
 10851                              <1> 	;push	edi
 10852                              <1> 	;push	ecx
 10853                              <1> 	;mov	cl, 64
 10854                              <1> 	;rep	movsd
 10855                              <1> 	;pop	ecx
 10856                              <1> 	;pop	edi
 10857                              <1> 	;mov	esi, ebp ; user's font buffer
 10858 0000FDA8 E880000000          <1> 	call	sysvideo_27_23
 10859 0000FDAD EB40                <1> 	jmp	short sysvideo_27_21
 10860                              <1> 
 10861                              <1> sysvideo_27_15:
 10862                              <1> 	; check system font overwrite permission
 10863 0000FDAF F605[32100300]80    <1> 	test	byte [ufont], 80h
 10864 0000FDB6 7499                <1> 	jz	short sysvideo_27_8
 10865                              <1> 
 10866 0000FDB8 80FB08              <1> 	cmp	bl, 8
 10867 0000FDBB 773A                <1> 	ja	short sysvideo_27_22 ; 8x16 system font
 10868 0000FDBD 722B                <1> 	jb	short sysvideo_27_20 ; 8x8 system font
 10869                              <1> 	; bl = 8
 10870                              <1> 	; overwrite 8x14 system font 
 10871                              <1> 	;mov	al, 14
 10872                              <1> 	;mul	dl
 10873                              <1> 	;mov	dx, ax
 10874                              <1> 	;push	edx
 10875                              <1> 	;mov	ax, 14
 10876                              <1> 	;mul	cx
 10877                              <1> 	;mov	cx, ax
 10878                              <1> 	;pop	edx
 10879 0000FDBF E857000000          <1> 	call	sysvideo_27_14
 10880 0000FDC4 BF[D8550100]        <1> 	mov	edi, vgafont14
 10881 0000FDC9 EB0B                <1> 	jmp	short sysvideo_27_18
 10882                              <1> sysvideo_27_16:
 10883                              <1> 	; bl = 9
 10884                              <1> 	; overwrite 8x16 system font
 10885 0000FDCB BF[D8630100]        <1> 	mov	edi, vgafont16
 10886                              <1> sysvideo_27_17:
 10887                              <1> 	; overwrite 8x16 font
 10888                              <1> 	;shl	dx, 4 ; * 16
 10889                              <1> 	;shl	cx, 4 ; * 16 ; 16 bytes per char
 10890                              <1> 	; 23/07/2022
 10891 0000FDD0 C1E204              <1> 	shl	edx, 4 ; * 16
 10892 0000FDD3 C1E104              <1> 	shl	ecx, 4 ; * 16
 10893                              <1> sysvideo_27_18:
 10894 0000FDD6 01D7                <1> 	add	edi, edx
 10895                              <1> 	;add	esi, edx ; 16/02/2021
 10896                              <1> sysvideo_27_18_0:
 10897                              <1> 	; ecx = byte count
 10898                              <1> 	; esi = source (in user memory)
 10899                              <1> 	; edi = destination (in system memory)
 10900 0000FDD8 E816100000          <1> 	call	transfer_from_user_buffer
 10901 0000FDDD 7206                <1> 	jc	short sysvideo_27_19
 10902 0000FDDF 890D[1C010300]      <1> 	mov	[u.r0], ecx	
 10903                              <1> sysvideo_27_19:
 10904 0000FDE5 E985CFFFFF          <1> 	jmp	sysret
 10905                              <1> sysvideo_27_20:
 10906                              <1> 	; bl = 7
 10907                              <1> 	; overwrite 8x8 system font
 10908 0000FDEA BF[D84D0100]        <1> 	mov	edi, vgafont8
 10909                              <1> sysvideo_27_21:
 10910                              <1> 	; overwrite 8x8 font
 10911                              <1> 	;shl	dx, 3 ; * 8
 10912                              <1> 	;shl	cx, 3 ; * 8 ; 8 bytes per char
 10913                              <1> 	; 23/07/2022
 10914 0000FDEF C1E203              <1> 	shl	edx, 3 ; * 8
 10915 0000FDF2 C1E103              <1> 	shl	ecx, 3 ; * 8
 10916 0000FDF5 EBDF                <1> 	jmp	short sysvideo_27_18
 10917                              <1> sysvideo_27_22:
 10918                              <1> 	; bl = 11
 10919                              <1> 	; overwrite 8x16 user defined font
 10920 0000FDF7 BF00400900          <1> 	mov	edi, VGAFONT16USER
 10921 0000FDFC F605[32100300]10    <1> 	test	byte [ufont], 16 ; 8x16 user font loaded ?
 10922 0000FE03 75CB                <1> 	jnz	short sysvideo_27_17 ; yes
 10923 0000FE05 08ED                <1> 	or	ch, ch ; cx = 256
 10924                              <1> 	;jnz	short sysvideo_27_17 ; 256 chars
 10925 0000FE07 7406                <1> 	jz	short sysvideo_27_22_0
 10926 0000FE09 66B90010            <1> 	mov	cx, 16*256
 10927 0000FE0D EBC9                <1> 	jmp	short sysvideo_27_18_0
 10928                              <1> sysvideo_27_22_0:
 10929                              <1> 	; copy system font to user font before overwrite
 10930 0000FE0F BE[D8630100]        <1> 	mov	esi, vgafont16
 10931                              <1> 	;push	edi
 10932                              <1> 	;push	ecx
 10933                              <1> 	;mov	cl, 64
 10934                              <1> 	;rep	movsd
 10935                              <1> 	;pop	ecx
 10936                              <1> 	;pop	edi
 10937                              <1> 	;mov	esi, ebp ; user's font buffer
 10938 0000FE14 E814000000          <1> 	call	sysvideo_27_23
 10939 0000FE19 EBB5                <1> 	jmp	short sysvideo_27_17
 10940                              <1> 
 10941                              <1> sysvideo_27_14:
 10942                              <1> 	; 16/02/2021
 10943 0000FE1B 52                  <1> 	push	edx
 10944 0000FE1C 66B80E00            <1> 	mov	ax, 14	
 10945 0000FE20 66F7E1              <1> 	mul	cx
 10946 0000FE23 89C1                <1> 	mov	ecx, eax
 10947 0000FE25 5A                  <1> 	pop	edx
 10948 0000FE26 B00E                <1> 	mov	al, 14
 10949 0000FE28 F6E2                <1> 	mul	dl
 10950 0000FE2A 89C2                <1> 	mov	edx, eax
 10951 0000FE2C C3                  <1> 	retn
 10952                              <1> 
 10953                              <1> 	;mov	al, 14
 10954                              <1> 	;mul	dl
 10955                              <1> 	;mov	dx, ax
 10956                              <1> 	;push	edx
 10957                              <1> 	;; 12/02/2021
 10958                              <1> 	;mov	ax, 14
 10959                              <1> 	;;mov	eax, 14
 10960                              <1> 	;;mul	cx
 10961                              <1> 	;mul	ecx
 10962                              <1> 	;;mov	cx, ax
 10963                              <1> 	;mov	ecx, eax
 10964                              <1> 	;pop	edx
 10965                              <1> 	;retn	
 10966                              <1> 
 10967                              <1> sysvideo_27_23:
 10968 0000FE2D 57                  <1> 	push	edi
 10969 0000FE2E 51                  <1> 	push	ecx
 10970 0000FE2F B140                <1> 	mov	cl, 64
 10971 0000FE31 F3A5                <1> 	rep	movsd
 10972 0000FE33 59                  <1> 	pop	ecx
 10973 0000FE34 5F                  <1> 	pop	edi
 10974 0000FE35 89EE                <1> 	mov	esi, ebp ; user's font buffer
 10975 0000FE37 C3                  <1> 	retn
 10976                              <1> 
 10977                              <1> sysvideo_28:
 10978                              <1> 	; 23/07/2022
 10979                              <1> 	; 24/01/2021
 10980                              <1> 	; 23/01/2021
 10981                              <1> 	; 18/01/2021
 10982 0000FE38 80FF0E              <1> 	cmp	bh, 14
 10983                              <1> 	;jb	sysvideo_29
 10984                              <1> 	; 23/07/2022
 10985 0000FE3B 7222                <1> 	jb	short sysvideo_28_29
 10986                              <1> 	;ja	sysvideo_30
 10987                              <1> 	; 23/07/2022
 10988 0000FE3D 7725                <1> 	ja	short sysvideo_28_30
 10989                              <1> 
 10990                              <1> 	; BH = 14
 10991                              <1> 	; Save/Restore Super VGA video state
 10992                              <1> 	
 10993                              <1> 	; BL = options
 10994                              <1> 	;	bit 0 - Save (0) or Restore (1)	
 10995                              <1> 	;	bit 1 - controller hardware state
 10996                              <1> 	;	bit 2 - BIOS data state
 10997                              <1> 	;	bit 3 - DAC state
 10998                              <1> 	;	bit 4 - (extended) Register state
 10999                              <1> 	;	bit 5 - system (0) or user (1) memory
 11000                              <1> 	;	bit 6 - verify without transfer
 11001                              <1> 	;	bit 7 - not used (must be 0)
 11002                              <1> 
 11003                              <1> 	; ECX = Buffer address or VideoStateID
 11004                              <1> 
 11005 0000FE3F 803D[64090000]02    <1> 	cmp	byte [vbe3], 2 ;  VESA VBE2 or VBE3 ?
 11006 0000FE46 7721                <1> 	ja	short sysvideo_28_0 ; yes
 11007 0000FE48 7210                <1> 	jb	short sysvideo_28_16 ; not a SVGA sys !
 11008                              <1> 
 11009                              <1> 	; == VBE2 ==
 11010                              <1> 	; Check Bochs/Qemu/VirtualBox PC emulator
 11011                              <1> 	; (vbe2 is usable only for emulator's vbios)
 11012 0000FE4A 8A25[65090000]      <1> 	mov	ah, [vbe2bios]
 11013 0000FE50 80FCC0              <1> 	cmp	ah, 0C0h	
 11014 0000FE53 7205                <1> 	jb	short sysvideo_28_16 ; unknown vbios !
 11015 0000FE55 80FCC5              <1> 	cmp	ah, 0C5h
 11016 0000FE58 760F                <1> 	jna	short sysvideo_28_0
 11017                              <1> 		; Use kernel's vbios functions (video.s)
 11018                              <1> sysvideo_28_16:
 11019                              <1> 	; unknown vbios !
 11020 0000FE5A E910CFFFFF          <1> 	jmp	sysret
 11021                              <1> 
 11022                              <1> sysvideo_28_29:
 11023                              <1> 	; 23/07/2022
 11024 0000FE5F E955010000          <1> 	jmp	sysvideo_29
 11025                              <1> sysvideo_28_30:
 11026                              <1> 	; 23/07/2022
 11027 0000FE64 E935020000          <1> 	jmp	sysvideo_30	
 11028                              <1> 
 11029                              <1> sysvideo_28_0:
 11030 0000FE69 80FB7F              <1> 	cmp	bl, 7Fh
 11031 0000FE6C 77EC                <1> 	ja	short sysvideo_28_16 ; unknown options
 11032                              <1> 
 11033 0000FE6E 88DA                <1> 	mov	dl, bl
 11034 0000FE70 80E21F              <1> 	and	dl, 1Fh 
 11035 0000FE73 D0EA                <1> 	shr	dl, 1
 11036 0000FE75 74E3                <1> 	jz	short sysvideo_28_16 ; invalid !
 11037                              <1> 	; DL = VBE Function 4F04h Save/Restore options 	
 11038                              <1> 	;  bit 0 : controller hardware state
 11039                              <1> 	;  bit 1 : BIOS data state
 11040                              <1> 	;  bit 2 : DAC state
 11041                              <1> 	;  bit 3 : (extended) Register state
 11042                              <1> 	
 11043 0000FE77 F6C320              <1> 	test	bl, 32 ; bit 5
 11044                              <1> 	;jnz	sysvideo_28_7 ; user buffer
 11045                              <1> 	; 23/07/2022
 11046 0000FE7A 7405                <1> 	jz	short sysvideo_28_17
 11047 0000FE7C E9B1000000          <1> 	jmp	sysvideo_28_7
 11048                              <1> 
 11049                              <1> sysvideo_28_17:	 ; 23/07/2022
 11050                              <1> 	; source or destination is kernel/system buffer
 11051                              <1> 
 11052 0000FE81 803D[34100300]00    <1> 	cmp	byte [srvsf], 0 ; srs permission flag
 11053 0000FE88 76D0                <1> 	jna	short sysvideo_28_16 ; not permitted
 11054                              <1> 
 11055 0000FE8A F6C301              <1> 	test	bl, 1
 11056 0000FE8D 743A                <1> 	jz	short sysvideo_28_4 ; Save
 11057                              <1> 
 11058                              <1> 	; Restore
 11059 0000FE8F 3B0D[36100300]      <1> 	cmp	ecx, [VideoStateID]
 11060 0000FE95 75C3                <1> 	jne	short sysvideo_28_16 ; not correct ID !
 11061                              <1> 		
 11062 0000FE97 0FB6CA              <1> 	movzx	ecx, dl
 11063 0000FE9A 80CA80              <1> 	or	dl, 80h
 11064 0000FE9D 3A15[35100300]      <1> 	cmp	dl, [srvso]
 11065 0000FEA3 75B5                <1> 	jne	short sysvideo_28_16 ; not correct !
 11066                              <1> 
 11067 0000FEA5 88DA                <1> 	mov	dl, bl
 11068                              <1> 
 11069                              <1> 	; ecx = cl = options
 11070 0000FEA7 E8613CFFFF          <1> 	call	vbe_srs_gbs
 11071                              <1> 	; ebx = state buffer size (data size)
 11072                              <1> 
 11073 0000FEAC 891D[1C010300]      <1> 	mov	[u.r0], ebx
 11074                              <1> 
 11075 0000FEB2 F6C240              <1> 	test	dl, 64 ; verify without transfer
 11076 0000FEB5 75A3                <1> 	jnz	short sysvideo_28_16 ; yes
 11077                              <1> 
 11078 0000FEB7 BE00580900          <1> 	mov	esi, VBE3VIDEOSTATE	
 11079 0000FEBC BF00760900          <1> 	mov	edi, VBE3SAVERESTOREBLOCK
 11080 0000FEC1 87CB                <1> 	xchg	ecx, ebx
 11081 0000FEC3 F3A4                <1> 	rep	movsb
 11082                              <1> 	
 11083 0000FEC5 88D9                <1> 	mov	cl, bl
 11084                              <1> 
 11085                              <1> 	; 23/01/2021
 11086 0000FEC7 EB44                <1> 	jmp	short sysvideo_28_10
 11087                              <1> 
 11088                              <1> sysvideo_28_4:
 11089 0000FEC9 53                  <1> 	push	ebx	
 11090                              <1> 	; 24/01/2021
 11091 0000FECA 31DB                <1> 	xor	ebx, ebx ; 0 ; use kernel's buffer
 11092 0000FECC 881D[35100300]      <1> 	mov	[srvso], bl ; 0 ; invalidate
 11093 0000FED2 891D[36100300]      <1> 	mov	[VideoStateID], ebx ; 0 ; invalidate
 11094 0000FED8 0FB6CA              <1> 	movzx	ecx, dl ; options
 11095 0000FEDB B201                <1> 	mov	dl, 1 ; save state		
 11096 0000FEDD E890000000          <1> 	call	sysvideo_28_11 ; 23/01/2021
 11097                              <1> 	; Note: VBE3 BIOS data save option will be
 11098                              <1> 	;	disabled.. ; 24/01/2021
 11099 0000FEE2 89CA                <1> 	mov	edx, ecx ; state (save) options
 11100 0000FEE4 5B                  <1> 	pop	ebx
 11101                              <1> 	
 11102 0000FEE5 6683F84F            <1> 	cmp	ax, 4Fh ; successful ?
 11103 0000FEE9 7536                <1> 	jne	short sysvideo_28_3 ; no !
 11104                              <1> 
 11105 0000FEEB F6C340              <1> 	test	bl, 64 ; verify without transfer
 11106 0000FEEE 7536                <1> 	jnz	short sysvideo_28_6 ; yes
 11107                              <1> 
 11108                              <1> 	; ecx = cl = options
 11109 0000FEF0 E8183CFFFF          <1> 	call	vbe_srs_gbs
 11110                              <1> 	; ebx = state buffer size (data size)
 11111                              <1> 
 11112 0000FEF5 BE00760900          <1> 	mov	esi, VBE3SAVERESTOREBLOCK
 11113 0000FEFA BF00580900          <1> 	mov	edi, VBE3VIDEOSTATE	
 11114 0000FEFF 89D9                <1> 	mov	ecx, ebx
 11115 0000FF01 F3A4                <1> 	rep	movsb
 11116                              <1> 
 11117 0000FF03 88D1                <1> 	mov	cl, dl
 11118 0000FF05 80C980              <1> 	or	cl, 80h ; SVGA (VESA VBE) flag
 11119                              <1> 	;mov	[srvso], dl
 11120                              <1> 
 11121 0000FF08 E908010000          <1> 	jmp	sysvideo_28_15
 11122                              <1> 
 11123                              <1> 	; 23/01/2021
 11124                              <1> sysvideo_28_10:
 11125                              <1> 	; CL = VESA VBE3 Save/Restore options
 11126                              <1> 
 11127 0000FF0D B202                <1> 	mov	dl, 2 ; restore state
 11128                              <1> 
 11129 0000FF0F E85C000000          <1> 	call	sysvideo_28_1
 11130                              <1> 
 11131 0000FF14 6683F84F            <1> 	cmp	ax, 4Fh ; successful ?
 11132 0000FF18 7407                <1> 	je	short sysvideo_28_3
 11133                              <1> 	;jmp	short sysvideo_28_9 
 11134                              <1> 
 11135                              <1> sysvideo_28_9:
 11136                              <1> 	; return zero size (error) to user
 11137 0000FF1A 29C0                <1> 	sub	eax, eax
 11138                              <1> sysvideo_28_5:
 11139 0000FF1C A3[1C010300]        <1> 	mov	[u.r0], eax
 11140                              <1> sysvideo_28_3:
 11141 0000FF21 E949CEFFFF          <1> 	jmp	sysret
 11142                              <1> 
 11143                              <1> sysvideo_28_6:
 11144                              <1> 	; use timer ticks as VideoStateID
 11145 0000FF26 A1[C8770100]        <1> 	mov	eax, [TIMER_LH]
 11146 0000FF2B 09C0                <1> 	or 	eax, eax
 11147 0000FF2D 75ED                <1> 	jnz	short sysvideo_28_5
 11148 0000FF2F 40                  <1> 	inc	eax
 11149 0000FF30 EBEA                <1> 	jmp	short sysvideo_28_5
 11150                              <1> 
 11151                              <1> sysvideo_28_7:
 11152                              <1> 	; save/restore to/from user buffer
 11153                              <1> 
 11154                              <1> 	; 23/01/2021
 11155 0000FF32 89CE                <1> 	mov	esi, ecx ; user's vstate buffer
 11156 0000FF34 BF00760900          <1> 	mov	edi, VBE3SAVERESTOREBLOCK
 11157                              <1> 
 11158 0000FF39 0FB6CA              <1> 	movzx	ecx, dl ; VESA VBE func 4F04h options
 11159                              <1> 
 11160                              <1> 	; source or destination is user buffer
 11161 0000FF3C F6C301              <1> 	test	bl, 1
 11162 0000FF3F 7444                <1> 	jz	short sysvideo_28_12  ; Save
 11163                              <1> 
 11164                              <1> 	; Restore
 11165 0000FF41 803D[34100300]00    <1> 	cmp	byte [srvsf], 0 ; srs permission flag
 11166 0000FF48 766A                <1> 	jna	short sysvideo_28_14 ; not permitted
 11167                              <1> 
 11168 0000FF4A 88DA                <1> 	mov	dl, bl ; 'sysvideo' options
 11169                              <1> 
 11170                              <1> 	; ecx = cl = options
 11171 0000FF4C E8BC3BFFFF          <1> 	call	vbe_srs_gbs
 11172                              <1> 	; ebx = state buffer size (data size)
 11173                              <1> 
 11174 0000FF51 891D[1C010300]      <1> 	mov	[u.r0], ebx ; transfer count
 11175                              <1> 
 11176 0000FF57 F6C240              <1> 	test	dl, 64 ; verify without transfer
 11177 0000FF5A 7558                <1> 	jnz	short sysvideo_28_14 ; yes
 11178                              <1>  
 11179 0000FF5C 6681FB0008          <1> 	cmp	bx, 2048
 11180 0000FF61 73B7                <1> 	jnb	short sysvideo_28_9 ; invalid
 11181                              <1> 
 11182 0000FF63 87CB                <1> 	xchg	ecx, ebx
 11183                              <1> 	; esi = user buffer
 11184                              <1> 	; edi = VBE3SAVERESTOREBLOCK
 11185                              <1> 
 11186 0000FF65 E8890E0000          <1> 	call	transfer_from_user_buffer
 11187 0000FF6A 72AE                <1> 	jc	short sysvideo_28_9 ; error 
 11188                              <1> 
 11189 0000FF6C 89D9                <1> 	mov	ecx, ebx ; Function 4F04h options
 11190 0000FF6E EB9D                <1> 	jmp	short sysvideo_28_10 ; 23/01/2021
 11191                              <1> 
 11192                              <1> sysvideo_28_1:
 11193 0000FF70 31DB                <1> 	xor	ebx, ebx ; 0 ; use kernel's buffer
 11194                              <1> sysvideo_28_11:
 11195                              <1> 	; 24/01/2021
 11196 0000FF72 803D[64090000]03    <1> 	cmp	byte [vbe3], 3
 11197 0000FF79 7405                <1> 	je	short sysvideo_28_2
 11198                              <1> 
 11199                              <1> 	; VESA VBE2 (BOCHS/QEMU/VBOX) video bios
 11200 0000FF7B E9F63AFFFF          <1> 	jmp	_vbe_biosfn_save_restore_state
 11201                              <1> sysvideo_28_2:
 11202                              <1> 	;24/01/2021
 11203                              <1> 	;mov	eax, 4F04h  ; Save/Restore vstate
 11204                              <1> 	; VESA VBE3 video bios
 11205 0000FF80 E96C1AFFFF          <1> 	jmp	_vbe3_pmfn_save_restore_state
 11206                              <1> 	
 11207                              <1> sysvideo_28_12:
 11208                              <1> 	; Save
 11209                              <1> 	;mov	edi, VBE3SAVERESTOREBLOCK
 11210                              <1> 
 11211                              <1> 	;movzx	ecx, dl ; options
 11212 0000FF85 56                  <1> 	push	esi
 11213 0000FF86 53                  <1> 	push	ebx
 11214                              <1> 	; 23/01/2021
 11215 0000FF87 B201                <1> 	mov	dl, 1 ; save state
 11216 0000FF89 E8E2FFFFFF          <1> 	call	sysvideo_28_1
 11217 0000FF8E 5A                  <1> 	pop	edx ; 'sysvideo' options
 11218 0000FF8F 5F                  <1> 	pop	edi ; user's video state buffer
 11219                              <1> 
 11220 0000FF90 6683F84F            <1> 	cmp	ax, 4Fh ; successful ?
 11221 0000FF94 751E                <1> 	jne	short sysvideo_28_14 ; no !
 11222                              <1> 
 11223                              <1> 	; ecx = cl = options
 11224 0000FF96 E8723BFFFF          <1> 	call	vbe_srs_gbs
 11225                              <1> 	; ebx = state buffer size (data size)
 11226                              <1> 
 11227 0000FF9B 89D9                <1> 	mov	ecx, ebx ; transfer count
 11228                              <1> 
 11229 0000FF9D F6C240              <1> 	test	dl, 64 ; verify without transfer
 11230 0000FFA0 750C                <1> 	jnz	short sysvideo_28_13 ; yes
 11231                              <1> 		
 11232                              <1> 	;mov	edi, esi
 11233 0000FFA2 BE00760900          <1> 	mov	esi, VBE3SAVERESTOREBLOCK
 11234 0000FFA7 E8FD0D0000          <1> 	call	transfer_to_user_buffer
 11235 0000FFAC 7206                <1> 	jc	short sysvideo_28_14
 11236                              <1> sysvideo_28_13:
 11237 0000FFAE 890D[1C010300]      <1> 	mov	[u.r0], ecx
 11238                              <1> sysvideo_28_14:
 11239 0000FFB4 E9B6CDFFFF          <1> 	jmp	sysret
 11240                              <1> 
 11241                              <1> sysvideo_29:
 11242                              <1> 	; 18/01/2021
 11243                              <1> 	; BH = 13
 11244                              <1> 	; Save/Restore std VGA video state
 11245                              <1> 
 11246                              <1> 	; bl = 0..3
 11247                              <1> 	;	save to or restore from
 11248                              <1> 	;	system buffer, VBE3VIDEOSTATE
 11249                              <1> 	;	ECX = VideoStateID for restoring	
 11250                              <1> 	; bl = 4..7
 11251                              <1> 	;	save to or restore from
 11252                              <1> 	;	user buffer pointed by ECX
 11253                              <1> 		   	
 11254 0000FFB9 80FB03              <1> 	cmp	bl, 3
 11255 0000FFBC 7776                <1> 	ja	short sysvideo_29_6
 11256                              <1> 
 11257                              <1> 	; source or destination is kernel/system buffer
 11258                              <1> 
 11259 0000FFBE 803D[34100300]00    <1> 	cmp	byte [srvsf], 0 ; srs permission flag
 11260 0000FFC5 7668                <1> 	jna	short sysvideo_29_5 ; not permitted
 11261                              <1> 
 11262 0000FFC7 F6C301              <1> 	test	bl, 1
 11263 0000FFCA 7437                <1> 	jz	short sysvideo_29_2  ; Save
 11264                              <1> 
 11265                              <1> 	; Restore
 11266 0000FFCC 3B0D[36100300]      <1> 	cmp	ecx, [VideoStateID]
 11267 0000FFD2 755B                <1> 	jne	short sysvideo_29_5 ; not correct ID !
 11268 0000FFD4 80FB01              <1> 	cmp	bl, 1
 11269 0000FFD7 7709                <1> 	ja	short sysvideo_29_0
 11270                              <1> 	; bl = 1
 11271 0000FFD9 BB6E000000          <1> 	mov	ebx, 110 
 11272 0000FFDE B103                <1> 	mov	cl, 3 ; ctrl, vbios data
 11273 0000FFE0 EB07                <1> 	jmp	short sysvideo_29_1
 11274                              <1> sysvideo_29_0:
 11275                              <1>  	; bl  = 3
 11276 0000FFE2 BB72030000          <1> 	mov	ebx, 882 
 11277 0000FFE7 B107                <1> 	mov	cl, 7 ; ctrl, vbios data, dac
 11278                              <1> sysvideo_29_1:
 11279 0000FFE9 3A0D[35100300]      <1> 	cmp	cl, [srvso]
 11280 0000FFEF 753E                <1> 	jne	short sysvideo_29_5 ; not correct !
 11281                              <1> 
 11282 0000FFF1 BE00580900          <1> 	mov	esi, VBE3VIDEOSTATE ; 22/01/2021
 11283 0000FFF6 E8A63CFFFF          <1> 	call	biosfn_restore_video_state
 11284 0000FFFB 891D[1C010300]      <1> 	mov	[u.r0], ebx ; video state size (bytes)
 11285                              <1> 	;jmp	sysret
 11286 00010001 EB2C                <1> 	jmp	short sysvideo_29_5	
 11287                              <1> sysvideo_29_2:
 11288                              <1> 	;mov	esi, ecx
 11289 00010003 BF00580900          <1> 	mov	edi, VBE3VIDEOSTATE
 11290                              <1> 	
 11291 00010008 B107                <1> 	mov	cl, 7 ; ctrl, vbios data, dac
 11292 0001000A 08DB                <1> 	or	bl, bl
 11293 0001000C 7502                <1> 	jnz	short sysvideo_29_3 ; bl = 2
 11294                              <1> 	; bl = 0 
 11295 0001000E B103                <1> 	mov	cl, 3 ; ctrl, vbios data
 11296                              <1> sysvideo_29_3:
 11297 00010010 E8243BFFFF          <1> 	call	biosfn_save_video_state
 11298                              <1> sysvideo_28_15:
 11299                              <1> 	; use timer ticks as VideoStateID
 11300 00010015 A1[C8770100]        <1> 	mov	eax, [TIMER_LH]
 11301 0001001A 21C0                <1> 	and 	eax, eax
 11302 0001001C 7501                <1> 	jnz	short sysvideo_29_4
 11303 0001001E 40                  <1> 	inc	eax
 11304                              <1> sysvideo_29_4:
 11305 0001001F 880D[35100300]      <1> 	mov	[srvso], cl
 11306 00010025 A3[36100300]        <1> 	mov	[VideoStateID], eax
 11307 0001002A A3[1C010300]        <1> 	mov	[u.r0], eax
 11308                              <1> sysvideo_29_5:
 11309 0001002F E93BCDFFFF          <1> 	jmp	sysret
 11310                              <1> 
 11311                              <1> sysvideo_29_6:
 11312 00010034 80FB07              <1> 	cmp	bl, 7
 11313 00010037 77F6                <1> 	ja	short sysvideo_29_5 ; invalid sub function 
 11314                              <1> 
 11315 00010039 89CE                <1> 	mov	esi, ecx
 11316 0001003B BF00760900          <1> 	mov	edi, VBE3SAVERESTOREBLOCK
 11317                              <1> 
 11318                              <1> 	; source or destination is user buffer
 11319 00010040 F6C301              <1> 	test	bl, 1
 11320 00010043 7434                <1> 	jz	short sysvideo_29_9  ; Save
 11321                              <1> 
 11322                              <1> 	; Restore
 11323 00010045 803D[34100300]00    <1> 	cmp	byte [srvsf], 0 ; srs permission flag
 11324 0001004C 76E1                <1> 	jna	short sysvideo_29_5 ; not permitted
 11325                              <1> 	
 11326                              <1> 	;mov	esi, ecx
 11327                              <1> 	;mov	edi, VBE3SAVERESTOREBLOCK
 11328                              <1> 	
 11329 0001004E 80FB07              <1> 	cmp	bl, 7
 11330 00010051 7409                <1> 	je	short sysvideo_29_7
 11331                              <1> 	; bl = 5 
 11332 00010053 B303                <1> 	mov	bl, 3
 11333 00010055 B96E000000          <1> 	mov	ecx, 110
 11334 0001005A EB05                <1> 	jmp	short sysvideo_29_8
 11335                              <1> sysvideo_29_7:
 11336                              <1> 	; bl = 7
 11337 0001005C B972030000          <1> 	mov	ecx, 882
 11338                              <1> sysvideo_29_8:
 11339 00010061 E88D0D0000          <1> 	call	transfer_from_user_buffer
 11340 00010066 72C7                <1> 	jc	short sysvideo_29_5
 11341 00010068 890D[1C010300]      <1> 	mov	[u.r0], ecx
 11342 0001006E 88D9                <1> 	mov	cl, bl ; mov cl,7 (mov cl,3)
 11343 00010070 89FE                <1> 	mov	esi, edi ; VBE3SAVERESTOREBLOCK
 11344                              <1> 	; cl = 3 or 7  	
 11345 00010072 E82A3CFFFF          <1> 	call	biosfn_restore_video_state
 11346 00010077 EBB6                <1> 	jmp	sysvideo_29_5
 11347                              <1> 	;jmp	sysret
 11348                              <1> sysvideo_29_9:
 11349                              <1> 	; Save
 11350                              <1> 	;mov	edi, VBE3SAVERESTOREBLOCK
 11351                              <1> 
 11352 00010079 80FB06              <1> 	cmp	bl, 6
 11353 0001007C 7409                <1> 	je	short sysvideo_29_10
 11354                              <1> 	; bl = 4
 11355 0001007E BB6E000000          <1> 	mov	ebx, 110
 11356 00010083 B103                <1> 	mov	cl, 3 ; ctrl, vbios data
 11357 00010085 EB07                <1> 	jmp	short sysvideo_29_11
 11358                              <1> sysvideo_29_10:
 11359                              <1> 	; bl = 6
 11360 00010087 BB72030000          <1> 	mov	ebx, 882
 11361 0001008C B107                <1> 	mov	cl, 7 ; ctrl, vbios data, dac
 11362                              <1> sysvideo_29_11:
 11363 0001008E E8A63AFFFF          <1> 	call	biosfn_save_video_state
 11364                              <1> 
 11365 00010093 89D9                <1> 	mov	ecx, ebx ; transfer count
 11366 00010095 89F7                <1> 	mov	edi, esi
 11367 00010097 BE00760900          <1> 	mov	esi, VBE3SAVERESTOREBLOCK
 11368                              <1> 
 11369                              <1> 	;call	transfer_to_user_buffer
 11370                              <1> 	;jc	short sysvideo_29_5
 11371                              <1> 	;mov	[u.r0], ecx ; transfer count
 11372                              <1> 	;;jmp	sysret
 11373                              <1> 	;jmp	short sysvideo_29_5
 11374                              <1>  
 11375 0001009C EB1A                <1> 	jmp	short sysvideo_29_12
 11376                              <1> 
 11377                              <1> sysvideo_30:	 
 11378 0001009E 80FF0F              <1> 	cmp	bh, 15
 11379 000100A1 7722                <1> 	ja	short sysvideo_31 ; invalid function
 11380                              <1> 	
 11381                              <1> 	; BH = 15
 11382                              <1> 	; Copy VESA EDID to user's buffer
 11383                              <1> 	
 11384 000100A3 803D[AF410000]4F    <1> 	cmp	byte [edid], 4Fh
 11385 000100AA 7519                <1> 	jne	short sysvideo_31 ; not ready ! 
 11386                              <1> 
 11387                              <1> 	;and	ecx, ecx
 11388                              <1> 	;jz	short sysvideo_31
 11389                              <1> 
 11390                              <1> 	; ecx = user's buffer address
 11391 000100AC 89CF                <1> 	mov	edi, ecx
 11392 000100AE BE[500F0300]        <1> 	mov	esi, edid_info
 11393 000100B3 B980000000          <1> 	mov	ecx, 128 ; 128 bytes
 11394                              <1> sysvideo_29_12:
 11395 000100B8 E8EC0C0000          <1> 	call	transfer_to_user_buffer
 11396 000100BD 7206                <1> 	jc	short sysvideo_31
 11397                              <1> 
 11398 000100BF 890D[1C010300]      <1> 	mov	[u.r0], ecx ; EDID size, 128 bytes
 11399                              <1> sysvideo_31:
 11400 000100C5 E9A5CCFFFF          <1> 	jmp	sysret
 11401                              <1> 
 11402                              <1> mkdir:
 11403                              <1> 	; 04/12/2015 (14 byte directory names)
 11404                              <1> 	; 12/10/2015
 11405                              <1> 	; 17/06/2015 (Retro UNIX 386 v1 - Beginning)
 11406                              <1> 	; 29/04/2013 - 01/08/2013 (Retro UNIX 8086 v1)
 11407                              <1> 	;
 11408                              <1> 	; 'mkdir' makes a directory entry from the name pointed to
 11409                              <1> 	; by u.namep into the current directory.
 11410                              <1> 	;
 11411                              <1> 	; INPUTS ->
 11412                              <1> 	;    u.namep - points to a file name 
 11413                              <1> 	;	           that is about to be a directory entry.
 11414                              <1> 	;    ii - current directory's i-number.	
 11415                              <1> 	; OUTPUTS ->
 11416                              <1> 	;    u.dirbuf+2 - u.dirbuf+10 - contains file name. 
 11417                              <1> 	;    u.off - points to entry to be filled 
 11418                              <1> 	;	     in the current directory		
 11419                              <1> 	;    u.base - points to start of u.dirbuf.
 11420                              <1> 	;    r1 - contains i-number of current directory 
 11421                              <1> 	;	
 11422                              <1> 	; ((AX = R1)) output
 11423                              <1> 	;
 11424                              <1> 	;    (Retro UNIX Prototype : 11/11/2012, UNIXCOPY.ASM)
 11425                              <1>         ;    ((Modified registers: EAX, EDX, EBX, ECX, ESI, EDI, EBP))  
 11426                              <1> 	;
 11427                              <1> 
 11428                              <1> 	; 17/06/2015 - 32 bit modifications (Retro UNIX 386 v1)
 11429 000100CA 31C0                <1> 	xor 	eax, eax
 11430 000100CC BF[56010300]        <1> 	mov     edi, u.dirbuf+2
 11431 000100D1 89FE                <1> 	mov	esi, edi
 11432 000100D3 AB                  <1> 	stosd
 11433 000100D4 AB                  <1> 	stosd
 11434                              <1> 	; 04/12/2015 (14 byte directory names)
 11435 000100D5 AB                  <1> 	stosd
 11436 000100D6 66AB                <1> 	stosw
 11437                              <1> 		; jsr r0,copyz; u.dirbuf+2; u.dirbuf+10. / clear this
 11438 000100D8 89F7                <1> 	mov	edi, esi ; offset to u.dirbuf
 11439                              <1> 	; 12/10/2015 ([u.namep] -> ebp)
 11440                              <1> 	;mov 	ebp, [u.namep]
 11441 000100DA E8CE040000          <1> 	call	trans_addr_nmbp ; convert virtual address to physical
 11442                              <1> 		; esi = physical address (page start + offset)
 11443                              <1> 		; ecx = byte count in the page (1 - 4096)
 11444                              <1> 	; edi = offset to u.dirbuf (edi is not modified in trans_addr_nm)
 11445                              <1> 		; mov u.namep,r2 / r2 points to name of directory entry
 11446                              <1> 		; mov $u.dirbuf+2,r3 / r3 points to u.dirbuf+2
 11447                              <1> mkdir_1: ; 1: 
 11448 000100DF 45                  <1> 	inc	ebp ; 12/10/2015
 11449                              <1> 	;
 11450                              <1> 	; / put characters in the directory name in u.dirbuf+2 - u.dirbuf+10
 11451                              <1> 	 ; 01/08/2013
 11452 000100E0 AC                  <1> 	lodsb
 11453                              <1> 		; movb (r2)+,r1 / move character in name to r1
 11454 000100E1 20C0                <1> 	and 	al, al
 11455 000100E3 7427                <1> 	jz 	short mkdir_3 	  
 11456                              <1> 		; beq 1f / if null, done
 11457 000100E5 3C2F                <1> 	cmp	al, '/'
 11458                              <1> 		; cmp r1,$'/ / is it a "/"?
 11459 000100E7 7414                <1> 	je	short mkdir_err
 11460                              <1> 	;je	error
 11461                              <1> 		; beq error9 / yes, error
 11462                              <1> 	; 12/10/2015
 11463 000100E9 6649                <1> 	dec	cx
 11464 000100EB 7505                <1> 	jnz	short mkdir_2
 11465                              <1> 	; 12/10/2015 ([u.namep] -> ebp)
 11466 000100ED E8C1040000          <1> 	call	trans_addr_nm ; convert virtual address to physical
 11467                              <1> 		; esi = physical address (page start + offset)
 11468                              <1> 		; ecx = byte count in the page
 11469                              <1> 	; edi = offset to u.dirbuf (edi is not modified in trans_addr_nm)
 11470                              <1> mkdir_2:
 11471 000100F2 81FF[64010300]      <1> 	cmp     edi, u.dirbuf+16 ; ; 04/12/2015 (10 -> 16) 
 11472                              <1> 		; cmp r3,$u.dirbuf+10. / have we reached the last slot for
 11473                              <1> 				     ; / a char?
 11474 000100F8 74E5                <1> 	je	short mkdir_1
 11475                              <1> 		; beq 1b / yes, go back
 11476 000100FA AA                  <1> 	stosb
 11477                              <1> 		; movb r1,(r3)+ / no, put the char in the u.dirbuf
 11478 000100FB EBE2                <1> 	jmp 	short mkdir_1
 11479                              <1> 		; br 1b / get next char
 11480                              <1> mkdir_err:
 11481                              <1> 	; 17/06/2015
 11482 000100FD C705[84010300]1300- <1> 	mov	dword [u.error], ERR_NOT_DIR ; 'not a valid directory !'
 11482 00010105 0000                <1>
 11483 00010107 E943CCFFFF          <1> 	jmp	error
 11484                              <1> 
 11485                              <1> mkdir_3: ; 1:
 11486 0001010C A1[34010300]        <1> 	mov	eax, [u.dirp]
 11487 00010111 A3[3C010300]        <1> 	mov	[u.off], eax
 11488                              <1> 		; mov u.dirp,u.off / pointer to empty current directory
 11489                              <1> 				 ; / slot to u.off
 11490                              <1> wdir: ; 29/04/2013
 11491 00010116 C705[40010300]-     <1>         mov     dword [u.base], u.dirbuf
 11491 0001011C [54010300]          <1>
 11492                              <1> 		; mov $u.dirbuf,u.base / u.base points to created file name
 11493 00010120 C705[44010300]1000- <1>         mov     dword [u.count], 16 ; 04/12/2015 (10 -> 16) 
 11493 00010128 0000                <1>
 11494                              <1> 		; mov $10.,u.count / u.count = 10
 11495 0001012A 66A1[20020300]      <1> 	mov	ax, [ii] 
 11496                              <1> 		; mov ii,r1 / r1 has i-number of current directory
 11497 00010130 B201                <1> 	mov	dl, 1 ; owner flag mask ; RETRO UNIX 8086 v1 modification !
 11498 00010132 E85E1C0000          <1> 	call 	access
 11499                              <1> 		; jsr r0,access; 1 / get i-node and set its file up 
 11500                              <1> 				 ; / for writing
 11501                              <1> 	; AX = i-number of current directory
 11502                              <1> 	; 01/08/2013
 11503 00010137 FE05[82010300]      <1> 	inc     byte [u.kcall] ; the caller is 'mkdir' sign	
 11504 0001013D E8C60E0000          <1> 	call	writei
 11505                              <1> 		; jsr r0,writei / write into directory
 11506 00010142 C3                  <1> 	retn	
 11507                              <1> 		; rts r0
 11508                              <1> 
 11509                              <1> sysexec:
 11510                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
 11511                              <1> 	; 06/02/2022 - Retro UNIX 386 v1.2
 11512                              <1> 	; 18/11/2017
 11513                              <1> 	; 14/11/2017
 11514                              <1> 	; 13/11/2017
 11515                              <1> 	; 24/10/2016 - 04/01/2017
 11516                              <1> 	; 24/04/2016 - TRDOS 386 (TRDOS v2.0)
 11517                              <1> 	; 23/06/2015 - 23/10/2015 (Retro UNIX 386 v1)
 11518                              <1> 	; 03/06/2013 - 06/12/2013 (Retro UNIX 8086 v1)
 11519                              <1> 	;
 11520                              <1> 	; 'sysexec' initiates execution of a file whose path name if
 11521                              <1> 	; pointed to by 'name' in the sysexec call. 
 11522                              <1> 	; 'sysexec' performs the following operations:
 11523                              <1> 	;    1. obtains i-number of file to be executed via 'namei'.
 11524                              <1> 	;    2. obtains i-node of file to be exceuted via 'iget'.
 11525                              <1> 	;    3. sets trap vectors to system routines.
 11526                              <1> 	;    4. loads arguments to be passed to executing file into
 11527                              <1> 	;	highest locations of user's core
 11528                              <1> 	;    5. puts pointers to arguments in locations immediately
 11529                              <1> 	;	following arguments.
 11530                              <1> 	;    6.	saves number of arguments in next location.
 11531                              <1> 	;    7. initializes user's stack area so that all registers
 11532                              <1> 	;	will be zeroed and the PS is cleared and the PC set
 11533                              <1> 	;	to core when 'sysret' restores registers 
 11534                              <1> 	;	and does an rti.
 11535                              <1> 	;    8. initializes u.r0 and u.sp
 11536                              <1> 	;    9. zeros user's core down to u.r0
 11537                              <1> 	;   10.	reads executable file from storage device into core
 11538                              <1> 	;	starting at location 'core'.
 11539                              <1> 	;   11.	sets u.break to point to end of user's code with
 11540                              <1> 	;	data area appended.
 11541                              <1> 	;   12.	calls 'sysret' which returns control at location
 11542                              <1> 	;	'core' via 'rti' instruction.
 11543                              <1> 	;
 11544                              <1> 	; Calling sequence:
 11545                              <1> 	;	sysexec; namep; argp
 11546                              <1> 	; Arguments:
 11547                              <1> 	;	namep - points to pathname of file to be executed
 11548                              <1> 	;	argp  - address of table of argument pointers
 11549                              <1> 	;	argp1... argpn - table of argument pointers
 11550                              <1> 	;	argp1:<...0> ... argpn:<...0> - argument strings
 11551                              <1> 	; Inputs: (arguments)
 11552                              <1> 	; Outputs: -	
 11553                              <1> 	; ...............................................................
 11554                              <1> 	;
 11555                              <1> 	; Retro UNIX 386 v1 modification: 
 11556                              <1> 	;	User application runs in it's own virtual space 
 11557                              <1> 	;	which is izolated from kernel memory (and other
 11558                              <1> 	;	memory pages) via 80386	paging in ring 3 
 11559                              <1> 	;	privilige mode. Virtual start address is always 0.
 11560                              <1> 	;	User's core memory starts at linear address 400000h
 11561                              <1> 	;	(the end of the 1st 4MB).
 11562                              <1> 	;
 11563                              <1> 	; Retro UNIX 8086 v1 modification: 
 11564                              <1> 	;	user/application segment and system/kernel segment
 11565                              <1> 	;	are different and sysenter/sysret/sysrele routines
 11566                              <1> 	;	are different (user's registers are saved to 
 11567                              <1> 	;	and then restored from system's stack.)
 11568                              <1> 	;
 11569                              <1> 	;	NOTE: Retro UNIX 8086 v1 'arg2' routine gets these
 11570                              <1> 	;	      arguments which were in these registers;
 11571                              <1> 	;	      but, it returns by putting the 1st argument
 11572                              <1> 	;	      in 'u.namep' and the 2nd argument
 11573                              <1> 	;	      on top of stack. (1st argument is offset of the
 11574                              <1> 	;	      file/path name in the user's program segment.)
 11575                              <1> 	
 11576                              <1> 	;call	arg2
 11577                              <1> 	; * name - 'u.namep' points to address of file/path name
 11578                              <1> 	;          in the user's program segment ('u.segmnt')
 11579                              <1> 	;          with offset in BX register (as sysopen argument 1).
 11580                              <1> 	; * argp - sysexec argument 2 is in CX register 
 11581                              <1> 	;          which is on top of stack.
 11582                              <1> 	;
 11583                              <1> 		; jsr r0,arg2 / arg0 in u.namep,arg1 on top of stack
 11584                              <1> 
 11585                              <1> 	; 23/06/2015 (32 bit modifications)
 11586                              <1> 
 11587                              <1> 	;; 13/11/2017
 11588                              <1> 	;;mov	[u.namep], ebx ; argument 1
 11589                              <1>         ; 18/10/2015
 11590 00010143 890D[18020300]      <1> 	mov     [argv], ecx  ; * ; argument 2
 11591                              <1> 
 11592                              <1> 	; 13/11/2017
 11593 00010149 89DE                <1> 	mov	esi, ebx
 11594 0001014B E81D1F0000          <1> 	call	set_working_path_x
 11595 00010150 7319                <1> 	jnc	short sysexec_0
 11596                              <1> 
 11597                              <1> 	;; 'bad command or file name'
 11598                              <1> 	;mov	eax, ERR_BAD_CMD_ARG ; 01h ; TRDOS 8086
 11599                              <1> 	
 11600                              <1> 	; 'file not found !' error
 11601 00010152 B802000000          <1> 	mov	eax, ERR_NOT_FOUND ; 02h ; TRDOS 8086
 11602                              <1> sysexec_not_found_err:
 11603                              <1> sysexec_access_error:
 11604                              <1> sysexec_ext_error:
 11605 00010157 A3[1C010300]        <1> 	mov	[u.r0], eax
 11606 0001015C A3[84010300]        <1> 	mov	[u.error], eax
 11607 00010161 E8DC1F0000          <1> 	call 	reset_working_path
 11608 00010166 E9E4CBFFFF          <1> 	jmp	error
 11609                              <1> 
 11610                              <1> sysexec_0:
 11611                              <1> 	; 13/11/2017
 11612                              <1> 	;mov	esi, FindFile_Name
 11613 0001016B 66B80018            <1>         mov	ax, 1800h ; Only files 
 11614 0001016F E81C89FFFF          <1> 	call	find_first_file
 11615 00010174 72E1                <1> 	jc	short sysexec_not_found_err ; eax = 2
 11616                              <1> 
 11617                              <1> 	; check_ file attributes
 11618                              <1> 	; (attribute bits = 00ADVSHR) ; 18h = Directory+Volume
 11619                              <1> 	; BL = Attributes byte
 11620                              <1> 	
 11621 00010176 F6C306              <1>         test	bl, 6  ; system file or hidden file (S+H) 
 11622                              <1> 	;jz	short sysexec_0ext
 11623 00010179 7417                <1> 	jz	short sysexec_1 ; yes
 11624                              <1> 
 11625                              <1> 	; 13/11/2017 
 11626                              <1> 	; /// TRDOS386 permission check for multiuser mode ///
 11627                              <1> 	; SYSTEM file or HIDDEN file !!
 11628                              <1> 	; (Only super user has permission to run this file.)
 11629                              <1> 	
 11630                              <1> 	; ([u.uid]=0 for super user or root in multiuser mode)
 11631                              <1> 	; ([u.uid]=0 for any users in singleuser mode) 
 11632 0001017B 803D[6E010300]00    <1> 	cmp 	byte [u.uid], 0 ; Super User ([u.uid]=0) ?
 11633                              <1> 	;jna	short sysexec_0ext
 11634 00010182 760E                <1> 	jna	short sysexec_1 ; yes 
 11635                              <1> 
 11636                              <1> 	; 'permission denied !' error  
 11637 00010184 B80B000000          <1>         mov	eax, ERR_FILE_ACCESS  ; 11 = ERR_PERM_DENIED
 11638 00010189 EBCC                <1>         jmp	short sysexec_access_error
 11639                              <1> 
 11640                              <1> sysexec_not_exf:
 11641                              <1> 	; 'not executable file !' error
 11642 0001018B B816000000          <1> 	mov	eax, ERR_NOT_EXECUTABLE
 11643 00010190 EBC5                <1> 	jmp	sysexec_ext_error
 11644                              <1> 
 11645                              <1> ;sysexec_0ext:
 11646                              <1> sysexec_1:
 11647                              <1> 	; 18/11/2017
 11648 00010192 BE[EC800100]        <1> 	mov	esi, FindFile_Name
 11649                              <1> 	; 13/11/2017
 11650                              <1> 	; check program file name extension
 11651                              <1> 	; ('.PRG' for current TRDOS version)
 11652 00010197 E8BFA2FFFF          <1> 	call	check_prg_filename_ext
 11653 0001019C 72ED                <1> 	jc	short sysexec_not_exf
 11654                              <1> 	
 11655                              <1> 	; 18/11/2017
 11656 0001019E 3C50                <1> 	cmp	al, 'P'
 11657 000101A0 75E9                <1> 	jne	short sysexec_not_exf	
 11658                              <1> 
 11659                              <1> 	; '.PRG' extension is OK.
 11660                              <1> 	; Only '.PRG' files are valid program files
 11661                              <1> 	; for current TRDOS 386 version.
 11662                              <1> 
 11663 000101A2 8B15[18810100]      <1> 	mov	edx, [FindFile_DirEntry+DirEntry_FileSize]
 11664 000101A8 66A1[10810100]      <1> 	mov	ax, [FindFile_DirEntry+DirEntry_FstClusHI]
 11665 000101AE C1E010              <1> 	shl	eax, 16
 11666 000101B1 66A1[16810100]      <1> 	mov	ax, [FindFile_DirEntry+DirEntry_FstClusLO]
 11667                              <1> 	; EAX = First Cluster number
 11668                              <1> 	; EDX = File Size
 11669                              <1> 
 11670 000101B7 A3[20020300]        <1> 	mov	[ii], eax
 11671 000101BC 8915[24020300]      <1> 	mov	[i.size], edx
 11672                              <1> 
 11673                              <1> ;sysexec_1:
 11674                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
 11675                              <1> 	; 06/02/2022 - Retro UNIX 386 v1.2
 11676                              <1> 	; 13/11/2017 - TRDOS 386 (TRDOS v2.0)
 11677                              <1> 	; 24/06/2015 - 23/10/2015 (Retro UNIX 386 v1)
 11678                              <1>         ; Moving arguments to the end of [u.upage]
 11679                              <1> 	; (by regarding page borders in user's memory space)
 11680                              <1> 	;
 11681                              <1> 	; 10/10/2015
 11682                              <1> 	; 21/07/2015
 11683                              <1> 	;mov	ebp, esp ; (**)
 11684                              <1> 	; 18/10/2015
 11685                              <1> 	;mov 	edi, ebp
 11686                              <1> 	; 23/07/2022
 11687 000101C2 89E7                <1> 	mov	edi, esp ; (**)
 11688 000101C4 B900010000          <1> 	mov 	ecx, MAX_ARG_LEN ; 256
 11689                              <1> 	;sub	edi, MAX_ARG_LEN ; 256
 11690 000101C9 29CF                <1> 	sub	edi, ecx
 11691 000101CB 89FC                <1> 	mov	esp, edi ; *!*
 11692 000101CD 31C0                <1> 	xor	eax, eax
 11693 000101CF A3[48010300]        <1> 	mov 	[u.nread], eax ; 0
 11694                              <1> 	; ([argc] must be cleared because previous 'sysexec'
 11695                              <1> 	; may leave it with any value after an error))
 11696                              <1> 	;mov	[argc], ax ; 0 ; 13/11/2017
 11697                              <1> 	; 23/07/2022
 11698 000101D4 A3[14020300]        <1> 	mov	[argc], eax ; 0
 11699 000101D9 49                  <1> 	dec	ecx ; 256 - 1
 11700 000101DA 890D[44010300]      <1> 	mov 	[u.count], ecx ; MAX_ARG_LEN - 1 ; 255
 11701                              <1> 	;mov 	dword [u.count], MAX_ARG_LEN - 1 ; 255
 11702                              <1> sysexec_2:
 11703 000101E0 8B35[18020300]      <1> 	mov	esi, [argv] ; 18/10/2015 
 11704 000101E6 E87A020000          <1> 	call	get_argp
 11705                              <1> 	;mov	ecx, 4 
 11706                              <1> 	; 23/07/2022
 11707 000101EB 31C9                <1> 	xor	ecx, ecx
 11708 000101ED B104                <1> 	mov	cl, 4
 11709                              <1> sysexec_3:
 11710 000101EF 21C0                <1> 	and	eax, eax
 11711 000101F1 7453                <1>         jz	short sysexec_6 ; 23/07/2022
 11712                              <1> 	; 18/10/2015
 11713 000101F3 010D[18020300]      <1> 	add	[argv], ecx ; 4
 11714                              <1> 	;;inc	word [argc]
 11715                              <1> 	; 23/07/2022
 11716                              <1> 	;inc	dword [argc]
 11717 000101F9 FE05[14020300]      <1> 	inc	byte [argc]
 11718                              <1> 	;
 11719 000101FF A3[40010300]        <1> 	mov	[u.base], eax
 11720                              <1>  	; 23/10/2015
 11721 00010204 66C705[80010300]00- <1> 	mov	word [u.pcount], 0
 11721 0001020C 00                  <1>
 11722                              <1> sysexec_4:
 11723 0001020D E8380B0000          <1> 	call	cpass ; get a character from user's core memory
 11724 00010212 750B                <1>         jnz	short sysexec_5
 11725                              <1> 		; (max. 255 chars + null)
 11726                              <1> 	; 18/10/2015
 11727 00010214 28C0                <1> 	sub 	al, al
 11728 00010216 AA                  <1> 	stosb
 11729 00010217 FF05[48010300]      <1> 	inc	dword [u.nread]
 11730                              <1> 	; 23/07/2022
 11731 0001021D EB27                <1> 	jmp	short sysexec_6 ; 24/04/2016
 11732                              <1> sysexec_5:
 11733 0001021F AA                  <1> 	stosb
 11734 00010220 20C0                <1> 	and 	al, al
 11735 00010222 75E9                <1> 	jnz	short sysexec_4
 11736                              <1> 	;mov	ecx, 4
 11737                              <1> 	; 23/07/2022
 11738 00010224 31C9                <1> 	xor	ecx, ecx
 11739 00010226 B104                <1> 	mov	cl, 4
 11740 00010228 390D[10020300]      <1> 	cmp	[ncount], ecx ; 4
 11741 0001022E 72B0                <1> 	jb	short sysexec_2
 11742 00010230 8B35[0C020300]      <1> 	mov	esi, [nbase]
 11743 00010236 010D[0C020300]      <1> 	add	[nbase], ecx ; 4	
 11744                              <1> 	;sub	[ncount], cx 
 11745                              <1> 	; 23/07/2022
 11746 0001023C 290D[10020300]      <1> 	sub	[ncount], ecx
 11747 00010242 8B06                <1> 	mov	eax, [esi]
 11748 00010244 EBA9                <1> 	jmp	short sysexec_3
 11749                              <1> 
 11750                              <1> sysexec_6:
 11751                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
 11752                              <1> 	; 19/11/2017
 11753                              <1> 	; 18/11/2017
 11754                              <1> 	; 14/11/2017
 11755                              <1> 	; 13/11/2017
 11756 00010246 8925[18020300]      <1> 	mov	[argv], esp ; *!* ; start address of argument list 
 11757                              <1> 
 11758                              <1> 	; 04/01/2017
 11759                              <1> 	; 24/10/2016
 11760                              <1> 	;;02/05/2016
 11761                              <1> 	; 23/04/2016 (TRDOS 386)
 11762                              <1> 	; 18/10/2015 ('sysexec_6')
 11763                              <1> 	; 23/06/2015
 11764 0001024C A1[74010300]        <1> 	mov	eax, [u.pgdir] ; physical address of page directory
 11765                              <1> 	;cmp 	eax, [k_page_dir] ; TRDOS MainProg ? 
 11766                              <1> 	;je	short sysexec_7
 11767                              <1> 	; 19/11/2017
 11768 00010251 8B1D[78010300]      <1> 	mov	ebx, [u.ppgdir] ; phy addr of the parent's page dir
 11769 00010257 E8C755FFFF          <1> 	call	deallocate_page_dir
 11770                              <1> sysexec_7:
 11771 0001025C E8F754FFFF          <1> 	call	make_page_dir
 11772                              <1> 	;jc	panic  ; allocation error 
 11773                              <1> 	;	       ; after a deallocation would be nonsence !?
 11774                              <1> 	; 23/07/2022
 11775 00010261 7243                <1> 	jc	short sysexec_panic
 11776                              <1> 
 11777                              <1> 	; 24/07/2015
 11778                              <1> 	; map kernel pages (1st 4MB) to PDE 0
 11779                              <1> 	;     of the user's page directory
 11780                              <1> 	;     (It is needed for interrupts!)
 11781                              <1> 	; 18/10/2015
 11782 00010263 8B15[48770100]      <1> 	mov	edx, [k_page_dir] ; Kernel's page directory
 11783 00010269 8B02                <1> 	mov	eax, [edx] ; physical address of
 11784                              <1> 			   ; kernel's first page table (1st 4 MB)
 11785                              <1> 			   ; (PDE 0 of kernel's page directory)
 11786 0001026B 8B15[74010300]      <1> 	mov 	edx, [u.pgdir]
 11787 00010271 8902                <1> 	mov	[edx], eax ; PDE 0 (1st 4MB)
 11788                              <1> 	;
 11789                              <1> 	; 20/07/2015
 11790 00010273 BB00004000          <1> 	mov	ebx, CORE ; start address = 0 (virtual) + CORE
 11791                              <1> 	; 18/10/2015
 11792 00010278 BE[04020300]        <1> 	mov	esi, pcore ; physical start address
 11793                              <1> sysexec_8:	
 11794 0001027D B907000000          <1> 	mov	ecx, PDE_A_USER + PDE_A_WRITE + PDE_A_PRESENT
 11795 00010282 E8EF54FFFF          <1> 	call	make_page_table
 11796                              <1> 	;jc	panic
 11797                              <1> 	; 23/07/2022
 11798 00010287 721D                <1> 	jc	short sysexec_panic
 11799                              <1> 	;
 11800                              <1> 	;mov	ecx, PTE_A_USER + PTE_A_WRITE + PTE_A_PRESENT
 11801 00010289 E8F654FFFF          <1> 	call	make_page ; make new page, clear and set the pte 
 11802                              <1> 	;jc	panic
 11803                              <1> 	; 23/07/2022
 11804 0001028E 7216                <1> 	jc	short sysexec_panic
 11805                              <1> 	;
 11806 00010290 8906                <1> 	mov	[esi], eax ; 24/06/2015
 11807                              <1> 	; ebx = virtual address (24/07/2015)
 11808                              <1> 	; 23/07/2022
 11809                              <1> 	;call 	add_to_swap_queue
 11810                              <1> 	; 18/10/2015
 11811 00010292 81FE[08020300]      <1> 	cmp	esi, ecore ; user's stack (last) page ?
 11812 00010298 7411                <1> 	je	short sysexec_9 ; yes
 11813 0001029A BE[08020300]        <1> 	mov	esi, ecore  ; physical address of the last page 
 11814                              <1> 	; 20/07/2015
 11815 0001029F BB00F0FFFF          <1> 	mov	ebx, (ECORE - PAGE_SIZE) + CORE
 11816                              <1> 	; ebx = virtual end address + segment base address - 4K
 11817 000102A4 EBD7                <1>         jmp     short sysexec_8
 11818                              <1> sysexec_panic:
 11819                              <1> 	; 23/07/2022
 11820 000102A6 E95E6AFFFF          <1> 	jmp	panic
 11821                              <1> 
 11822                              <1> sysexec_9:
 11823                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
 11824                              <1> 	; 19/11/2017 
 11825                              <1> 	; 24/04/2016 (TRDOS 386 = TRDOS v2.0)
 11826                              <1> 	; 25/06/2015 - 26/08/2015 - 18/10/2015
 11827                              <1> 	; move arguments from kernel stack to [ecore]
 11828                              <1> 	; (argument list/line will be copied from kernel stack
 11829                              <1> 	; frame to the last (stack) page of user's core memory)
 11830                              <1> 	; 18/10/2015
 11831 000102AB 8B3D[08020300]      <1> 	mov	edi, [ecore]
 11832 000102B1 81C700100000        <1> 	add	edi, PAGE_SIZE
 11833                              <1> 	; 19/11/2017
 11834                              <1> 	;sub	edi, 4
 11835                              <1> 	;mov	dword [edi], 0 
 11836                              <1> 	;mov	ebx, edi
 11837                              <1> 	;
 11838                              <1> 	;movzx	eax, word [argc]
 11839                              <1> 	;or	eax, eax
 11840                              <1> 	;jz	short sysexec_13 ; 19/11/2017
 11841                              <1> 	;;jnz	short sysexec_10
 11842                              <1> 	;;mov 	ebx, edi
 11843                              <1> 	;;sub	ebx, 4 
 11844                              <1> 	;;mov	[ebx], eax ; 0
 11845                              <1> 	;;jmp 	short sysexec_13
 11846                              <1> 	; 23/07/2022
 11847                              <1> 	; [argc] < 32
 11848 000102B7 A1[14020300]        <1> 	mov	eax, [argc]
 11849 000102BC 09C0                <1> 	or	eax, eax
 11850 000102BE 7509                <1> 	jnz	short sysexec_10
 11851 000102C0 89FB                <1> 	mov 	ebx, edi
 11852 000102C2 83EB04              <1> 	sub	ebx, 4 
 11853 000102C5 8903                <1> 	mov	[ebx], eax ; 0
 11854 000102C7 EB47                <1> 	jmp 	short sysexec_13
 11855                              <1> 
 11856                              <1> sysexec_10:
 11857 000102C9 8B0D[48010300]      <1> 	mov	ecx, [u.nread]
 11858                              <1> 	; 13/11/2017
 11859                              <1> 	;;mov	esi, TextBuffer ; 'load_and_execute_file'
 11860                              <1> 	;mov	esi, esp  	; 'sysexec'
 11861 000102CF 8B35[18020300]      <1> 	mov	esi, [argv] ; 24/04/2016 (TRDOS 386  = TRDOS v2.0)
 11862                              <1> 	; 23/07/2022
 11863 000102D5 29CF                <1> 	sub	edi, ecx ; page end address - argument list length
 11864                              <1> 	;sub	ebx, ecx ; 19/11/2017
 11865                              <1> 
 11866                              <1> 	;;;;
 11867                              <1> 	; 23/07/2022
 11868                              <1> 	; (move edi -backward- to dword boundary)
 11869                              <1> 	; ((this will prevent 'general protection fault' error
 11870                              <1> 	;  as result of a lodsd or dword move instruction
 11871                              <1> 	;  at the end of argument list))
 11872 000102D7 83EF03              <1> 	sub	edi, 3
 11873 000102DA 83E7FC              <1> 	and	edi, ~3 ; (*)
 11874                              <1> 	;;;
 11875                              <1> 
 11876 000102DD 89C2                <1> 	mov	edx, eax
 11877 000102DF FEC2                <1> 	inc	dl ; argument count + 1 for argc value  
 11878 000102E1 C0E202              <1> 	shl 	dl, 2  ; 4 * (argument count + 1)
 11879                              <1> 	; edx <= 128
 11880 000102E4 89FB                <1> 	mov	ebx, edi
 11881                              <1> 	;mov	edi, ebx ; 19//11/2017
 11882                              <1> 	; 23/07/2022 (*) - edi is already dword aligned -
 11883                              <1> 	;and	bl, 0FCh ; 32 bit (dword) alignment
 11884 000102E6 29D3                <1> 	sub 	ebx, edx
 11885 000102E8 89FA                <1> 	mov	edx, edi
 11886 000102EA F3A4                <1> 	rep	movsb
 11887 000102EC 89D6                <1> 	mov 	esi, edx
 11888 000102EE 89DF                <1> 	mov 	edi, ebx
 11889 000102F0 BA00F0BFFF          <1> 	mov	edx, ECORE - PAGE_SIZE ; virtual addr. of the last page
 11890 000102F5 2B15[08020300]      <1> 	sub 	edx, [ecore] ; difference (virtual - physical) 
 11891 000102FB AB                  <1> 	stosd	; eax = argument count	
 11892                              <1> sysexec_11:
 11893 000102FC 89F0                <1> 	mov	eax, esi
 11894 000102FE 01D0                <1> 	add	eax, edx
 11895 00010300 AB                  <1> 	stosd  ; eax = virtual address
 11896                              <1> 	; 23/07/2022
 11897 00010301 FE0D[14020300]      <1> 	dec	byte [argc]
 11898                              <1> 	;dec	dword [argc]
 11899                              <1> 	;;dec	word [argc] ; 14/11/2017
 11900 00010307 7407                <1> 	jz	short sysexec_13
 11901                              <1> sysexec_12:
 11902 00010309 AC                  <1> 	lodsb
 11903 0001030A 20C0                <1> 	and	al, al
 11904 0001030C 75FB                <1> 	jnz	short sysexec_12
 11905 0001030E EBEC                <1> 	jmp	short sysexec_11
 11906                              <1> sysexec_13:
 11907                              <1> 	; 24/10/2016
 11908                              <1> 	; 24/04/2016 - TRDOS 386 (TRDOS v2.0)
 11909                              <1> 	; 23/06/2015 - 19/10/2015 (Retro UNIX 386 v1, 'sysexec_13')
 11910                              <1> 	;
 11911                              <1> 	; moving arguments to [ecore] is OK here..
 11912                              <1> 	;
 11913                              <1> 	; ebx = beginning addres of argument list pointers
 11914                              <1> 		;	in user's stack
 11915 00010310 2B1D[08020300]      <1> 	sub 	ebx, [ecore]
 11916 00010316 81C300F0BFFF        <1> 	add     ebx, (ECORE - PAGE_SIZE)
 11917                              <1> 			; end of core - 4096 (last page)
 11918                              <1> 			; (virtual address)
 11919 0001031C 891D[18020300]      <1> 	mov	[argv], ebx
 11920 00010322 891D[4C010300]      <1> 	mov	[u.break], ebx ; available user memory
 11921                              <1> 	;
 11922 00010328 29C0                <1> 	sub	eax, eax
 11923 0001032A C705[44010300]2000- <1> 	mov	dword [u.count], 32 ; Executable file header size
 11923 00010332 0000                <1>
 11924 00010334 C705[30010300]-     <1> 	mov	dword [u.fofp], u.off
 11924 0001033A [3C010300]          <1>
 11925 0001033E A3[3C010300]        <1> 	mov	[u.off], eax ; 0
 11926 00010343 A3[40010300]        <1> 	mov	[u.base], eax ; 0, start of user's core (virtual)
 11927                              <1> 	; 24/10/2016
 11928 00010348 A0[0A780100]        <1> 	mov	al, [Current_Drv]
 11929 0001034D A2[01010300]        <1> 	mov	[cdev], al
 11930                              <1> 	;
 11931 00010352 A1[20020300]        <1> 	mov	eax, [ii] ; Fist Cluster of the Program (PRG) file
 11932                              <1> 	; EAX = First cluster of the executable file
 11933 00010357 E893050000          <1> 	call	readi
 11934                              <1> 
 11935 0001035C 8B0D[4C010300]      <1> 	mov	ecx, [u.break] ; top of user's stack (physical addr.)
 11936 00010362 890D[44010300]      <1> 	mov	[u.count], ecx ; save for overrun check
 11937                              <1> 	;
 11938 00010368 8B0D[48010300]      <1> 	mov	ecx, [u.nread]
 11939 0001036E 890D[4C010300]      <1> 	mov	[u.break], ecx ; virtual address (offset from start)
 11940 00010374 80F920              <1> 	cmp	cl, 32
 11941 00010377 7540                <1>         jne     short sysexec_15
 11942                              <1> 	;:
 11943                              <1> 	; Retro UNIX 386 v1 (32 bit) executable file header format
 11944 00010379 8B35[04020300]      <1> 	mov	esi, [pcore] ; start address of user's core memory 
 11945                              <1> 		             ; (phys. start addr. of the exec. file)
 11946 0001037F AD                  <1> 	lodsd
 11947 00010380 663DEB1E            <1> 	cmp	ax, 1EEBh ; EBH, 1Eh -> jump to +32
 11948 00010384 7533                <1> 	jne	short sysexec_15
 11949 00010386 AD                  <1> 	lodsd
 11950 00010387 89C1                <1> 	mov	ecx, eax ; text (code) section size
 11951 00010389 AD                  <1> 	lodsd
 11952 0001038A 01C1                <1> 	add	ecx, eax ; + data section size (initialized data)
 11953 0001038C 89CB                <1> 	mov	ebx, ecx
 11954 0001038E AD                  <1> 	lodsd	
 11955 0001038F 01C3                <1> 	add	ebx, eax ; + bss section size (for overrun checking)
 11956 00010391 3B1D[44010300]      <1> 	cmp	ebx, [u.count]
 11957 00010397 7711                <1> 	ja	short sysexec_14  ; program overruns stack !
 11958                              <1> 	;
 11959                              <1> 	; add bss section size to [u.break]
 11960 00010399 0105[4C010300]      <1> 	add 	[u.break], eax
 11961                              <1> 	;
 11962 0001039F 83E920              <1> 	sub	ecx, 32  ; header size (already loaded)
 11963                              <1> 	;cmp	ecx, [u.count]
 11964                              <1> 	;jnb	short sysexec_16
 11965 000103A2 890D[44010300]      <1> 	mov	[u.count], ecx ; required read count
 11966 000103A8 EB29                <1> 	jmp	short sysexec_16
 11967                              <1> sysexec_14:
 11968                              <1> 	; insufficient (out of) memory
 11969 000103AA C705[84010300]0400- <1> 	mov	dword [u.error], ERR_MINOR_IM ; 1
 11969 000103B2 0000                <1>
 11970 000103B4 E996C9FFFF          <1> 	jmp	error
 11971                              <1> sysexec_15:
 11972 000103B9 8B15[24020300]      <1>         mov	edx, [i.size] ; file size
 11973 000103BF 29CA                <1> 	sub	edx, ecx ; file size - loaded bytes
 11974 000103C1 7626                <1> 	jna	short sysexec_17 ; no need to next read
 11975 000103C3 01D1                <1> 	add	ecx, edx ; [i.size]
 11976 000103C5 3B0D[44010300]      <1> 	cmp	ecx, [u.count] ; overrun check (!)
 11977 000103CB 77DD                <1> 	ja	short sysexec_14
 11978 000103CD 8915[44010300]      <1> 	mov	[u.count], edx
 11979                              <1> sysexec_16:
 11980 000103D3 A1[20020300]        <1> 	mov	eax, [ii] ; first cluster
 11981 000103D8 E812050000          <1> 	call	readi
 11982 000103DD 8B0D[48010300]      <1> 	mov	ecx, [u.nread]
 11983 000103E3 010D[4C010300]      <1> 	add	[u.break], ecx
 11984                              <1> sysexec_17:
 11985 000103E9 A1[20020300]        <1> 	mov	eax, [ii] ; first cluster
 11986 000103EE E8A2190000          <1> 	call	iclose
 11987 000103F3 31C0                <1> 	xor     eax, eax
 11988 000103F5 FEC0                <1> 	inc	al
 11989 000103F7 66A3[68010300]      <1> 	mov	[u.intr], ax ; 1 (interrupt/time-out is enabled)
 11990 000103FD 66A3[6A010300]      <1> 	mov	[u.quit], ax ; 1 ('crtl+brk' signal is enabled) 
 11991                              <1> 	; 23/07/2022
 11992 00010403 FEC8                <1> 	dec	al
 11993                              <1> 	;cmp	dword [u.ppgdir], 0  ; is the caller MainProg (kernel) ?
 11994 00010405 3905[78010300]      <1> 	cmp	[u.ppgdir], eax ; 0 ; 23/07/2022
 11995 0001040B 770C                <1> 	ja	short sysexec_18 ; no, the caller is user process
 11996                              <1> 	; If the caller is kernel (MainProg), 'sysexec' will come here
 11997 0001040D 8B15[48770100]      <1> 	mov	edx, [k_page_dir] ; kernel's page directory
 11998 00010413 8915[78010300]      <1> 	mov	[u.ppgdir], edx ; next time 'sysexec' must not come here 
 11999                              <1> sysexec_18:
 12000                              <1> 	; 02/05/2016
 12001                              <1> 	; 24/04/2016 (TRDOS 386 = TRDOS v2.0)
 12002                              <1> 	; 18/10/2015 (Retro UNIX 386 v1)
 12003                              <1> 	; 05/08/2015
 12004                              <1> 	; 29/07/2015
 12005                              <1> 
 12006                              <1> ;	; **** arguments list test start - 19/11/2017
 12007                              <1> ;	mov	ebp, [argv]
 12008                              <1> ;	sub	ebp, ECORE - 4096
 12009                              <1> ;	add	ebp, [ecore]
 12010                              <1> ;
 12011                              <1> ;	mov	ebx, [ebp]
 12012                              <1> ;	mov	[argc], bx
 12013                              <1> ;	add	ebp, 4
 12014                              <1> ;	mov	byte [ccolor], 1Fh
 12015                              <1> ;_zx0:
 12016                              <1> ;	cmp	word [argc], 0
 12017                              <1> ;	jna	short _zx2
 12018                              <1> ;_zx1:
 12019                              <1> ;	push	ebp
 12020                              <1> ;	mov	esi, [ebp]
 12021                              <1> ;
 12022                              <1> ;	sub	esi, ECORE - 4096
 12023                              <1> ;	add	esi, [ecore]
 12024                              <1> ;
 12025                              <1> ;	call	print_cmsg
 12026                              <1> ;
 12027                              <1> ;	dec	word [argc]
 12028                              <1> ;	jz	short _zx2
 12029                              <1> ;
 12030                              <1> ;	mov	al, '.'
 12031                              <1> ;	mov	bl, 07h
 12032                              <1> ;	mov	bh, [u.ttyn]
 12033                              <1> ;	call 	_write_tty 
 12034                              <1> ;
 12035                              <1> ;	pop	ebp
 12036                              <1> ;	add	ebp, 4
 12037                              <1> ;	jmp	short _zx1
 12038                              <1> ;_zx2:
 12039                              <1> ;	pop	ebp
 12040                              <1> ;	mov	byte [ccolor], 07h
 12041                              <1> ;	mov	eax, 1
 12042                              <1> ;	; **** arguments list test stop
 12043                              <1> ;	Test result is OK! (there is not a wrong thing) - 19/11/2017
 12044                              <1> 
 12045 00010419 8B2D[18020300]      <1> 	mov	ebp, [argv] ; user's stack pointer must point to argument
 12046                              <1> 			    ; list pointers (argument count)
 12047 0001041F FA                  <1> 	cli
 12048 00010420 8B25[E4760100]      <1>         mov     esp, [tss.esp0] ; ring 0 (kernel) stack pointer
 12049                              <1> 	;mov   	esp, [u.sp] ; Restore Kernel stack
 12050                              <1> 			    ; for this process	 
 12051                              <1> 	;add	esp, 20 ; --> EIP, CS, EFLAGS, ESP, SS
 12052                              <1> 	;;xor	eax, eax ; 0
 12053                              <1> 	; 23/07/2022
 12054                              <1> 	;dec	al ; eax = 0
 12055                              <1> 	; eax = 0
 12056                              <1> 
 12057                              <1> 	;mov	edx, UDATA
 12058                              <1> 	; 18/11/2017
 12059 00010426 6A23                <1> 	push	UDATA ; user's stack segment
 12060                              <1> 	;push	edx
 12061 00010428 55                  <1> 	push	ebp ; user's stack pointer
 12062                              <1> 		    ; (points to number of arguments)
 12063                              <1> 	
 12064                              <1> 	; 04/01/2017
 12065                              <1> 	; MainProg comes here while [sysflg]= 0FFh
 12066                              <1> 	; (but sysexec comes here while [sysflg]= 0)
 12067 00010429 C605[10010300]00    <1> 	mov	byte [sysflg], 0 ; 04/01/2017
 12068                              <1> 				 ; (timer_int sysflg control)
 12069 00010430 FB                  <1> 	sti
 12070 00010431 9C                  <1> 	pushfd	; EFLAGS
 12071                              <1> 		; Set IF for enabling interrupts in user mode
 12072                              <1> 	;or	dword [esp], 200h 
 12073                              <1> 	;
 12074                              <1> 	;mov	bx, UCODE
 12075                              <1> 	;push	bx ; user's code segment
 12076 00010432 6A1B                <1> 	push	UCODE
 12077                              <1> 	;push	0
 12078 00010434 50                  <1> 	push	eax ; EIP (=0) - start address -
 12079 00010435 8925[14010300]      <1> 	mov	[u.sp], esp ; 29/07/2015
 12080                              <1> 	; 05/08/2015
 12081                              <1> 	; Remedy of a General Protection Fault during 'iretd' is here !
 12082                              <1> 	; ('push dx' would cause to general protection fault, 
 12083                              <1> 	; after 'pop ds' etc.)
 12084                              <1> 	;
 12085                              <1> 	;; push dx ; ds (UDATA)
 12086                              <1> 	;; push dx ; es (UDATA)
 12087                              <1> 	;; push dx ; fs (UDATA)
 12088                              <1> 	;; push dx ; gs (UDATA)
 12089                              <1> 	;
 12090                              <1> 	; This is a trick to prevent general protection fault
 12091                              <1> 	; during 'iretd' intruction at the end of 'sysrele' (in u1.s):
 12092 0001043B 66BA2300            <1> 	mov	dx, UDATA ; 19/11/2017
 12093 0001043F 8EC2                <1> 	mov 	es, dx ; UDATA
 12094 00010441 06                  <1> 	push 	es ; ds (UDATA)
 12095 00010442 06                  <1> 	push 	es ; es (UDATA)
 12096 00010443 06                  <1> 	push 	es ; fs (UDATA)
 12097 00010444 06                  <1> 	push	es ; gs (UDATA)
 12098 00010445 66BA1000            <1> 	mov	dx, KDATA
 12099 00010449 8EC2                <1> 	mov	es, dx
 12100                              <1> 	;
 12101                              <1> 	;; pushad simulation
 12102 0001044B 89E5                <1> 	mov	ebp, esp ; esp before pushad
 12103 0001044D 50                  <1> 	push	eax ; eax (0)
 12104 0001044E 50                  <1> 	push	eax ; ecx (0)
 12105 0001044F 50                  <1> 	push	eax ; edx (0)
 12106 00010450 50                  <1> 	push	eax ; ebx (0)
 12107 00010451 55                  <1> 	push	ebp ; esp before pushad
 12108 00010452 50                  <1> 	push	eax ; ebp (0)
 12109 00010453 50                  <1> 	push	eax ; esi (0)		
 12110 00010454 50                  <1> 	push	eax ; edi (0)	
 12111                              <1> 	;
 12112 00010455 A3[1C010300]        <1> 	mov	[u.r0], eax ; eax = 0
 12113 0001045A 8925[18010300]      <1> 	mov	[u.usp], esp
 12114                              <1> 
 12115                              <1> 	; 14/11/2017
 12116 00010460 E90CC9FFFF          <1> 	jmp	sysret0
 12117                              <1> 
 12118                              <1> get_argp:
 12119                              <1> 	; 08/08/2022
 12120                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
 12121                              <1> 	; 11/12/2021 - Retro UNIX 386 v1.2 
 12122                              <1> 	; 14/11/2017 - TRDOS 386 (TRDOS v2.0)
 12123                              <1> 	; 18/10/2015 (nbase, ncount)
 12124                              <1> 	; 21/07/2015
 12125                              <1> 	; 24/06/2015 (Retro UNIX 386 v1)
 12126                              <1> 	; Get (virtual) address of argument from user's core memory
 12127                              <1> 	;
 12128                              <1> 	; INPUT:
 12129                              <1> 	;	esi = virtual address of argument pointer
 12130                              <1> 	; OUTPUT:
 12131                              <1> 	;	eax = virtual address of argument
 12132                              <1> 	;
 12133                              <1> 	; Modified registers: EAX, EBX, ECX, EDX, ESI 
 12134                              <1> 	;
 12135 00010465 833D[78010300]00    <1>  	cmp     dword [u.ppgdir], 0 ; /etc/init ?
 12136                              <1> 				    ; (the caller is kernel)
 12137                              <1> 	;jna	short get_argpk
 12138                              <1> 	; 08/08/2022
 12139 0001046C 7705                <1> 	ja	short get_argp5
 12140 0001046E E985000000          <1> 	jmp	get_argpk
 12141                              <1> get_argp5:
 12142 00010473 89F3                <1>      	mov	ebx, esi
 12143 00010475 E85756FFFF          <1> 	call	get_physical_addr ; get physical address
 12144 0001047A 7253                <1>         jc      short get_argp_err ; 23/07/2022
 12145 0001047C A3[0C020300]        <1> 	mov 	[nbase], eax ; physical address	
 12146                              <1> 	;mov	[ncount], cx ; remain byte count in page (1-4096)
 12147                              <1> 	; 23/07/2022
 12148 00010481 890D[10020300]      <1> 	mov	[ncount], ecx
 12149                              <1> 	;mov	eax, 4 ; 21/07/2015
 12150 00010487 31C0                <1> 	xor	eax, eax
 12151 00010489 B004                <1> 	mov	al, 4
 12152                              <1> 	;cmp	cx, ax ; 4
 12153                              <1> 	; 23/07/2022
 12154 0001048B 39C1                <1> 	cmp	ecx, eax ; 4
 12155 0001048D 7354                <1> 	jnb	short get_argp2
 12156 0001048F 89F3                <1> 	mov	ebx, esi
 12157 00010491 01CB                <1> 	add	ebx, ecx
 12158 00010493 E83956FFFF          <1> 	call	get_physical_addr ; get physical address
 12159 00010498 7235                <1> 	jc	short get_argp_err
 12160                              <1> 	;push	esi
 12161 0001049A 89C6                <1> 	mov	esi, eax
 12162                              <1> 	;xchg	cx, [ncount]
 12163                              <1> 	; 23/07/2022
 12164 0001049C 870D[10020300]      <1> 	xchg	ecx, [ncount]
 12165 000104A2 8735[0C020300]      <1> 	xchg	esi, [nbase]
 12166 000104A8 B504                <1> 	mov	ch, 4
 12167 000104AA 28CD                <1> 	sub	ch, cl
 12168                              <1> get_argp0:
 12169 000104AC AC                  <1> 	lodsb
 12170                              <1> 	;push	ax
 12171                              <1> 	; 23/07/2022
 12172 000104AD 50                  <1> 	push	eax
 12173 000104AE FEC9                <1> 	dec	cl
 12174 000104B0 75FA                <1>         jnz     short get_argp0
 12175 000104B2 8B35[0C020300]      <1> 	mov	esi, [nbase]
 12176                              <1> 	; 21/07/2015
 12177 000104B8 0FB6C5              <1> 	movzx	eax, ch
 12178 000104BB 0105[0C020300]      <1> 	add	[nbase], eax
 12179                              <1> 	;sub	[ncount], ax
 12180                              <1> 	; 23/07/2022
 12181 000104C1 2905[10020300]      <1> 	sub	[ncount], eax
 12182                              <1> get_argp1:
 12183 000104C7 AC                  <1> 	lodsb
 12184 000104C8 FECD                <1> 	dec	ch
 12185 000104CA 7445                <1>         jz      short get_argp3
 12186                              <1>         ;push	ax
 12187                              <1> 	; 23/07/2022
 12188 000104CC 50                  <1> 	push	eax
 12189 000104CD EBF8                <1> 	jmp     short get_argp1
 12190                              <1> get_argp_err:
 12191 000104CF A3[84010300]        <1> 	mov	[u.error], eax
 12192                              <1> 	; 14/11/2017
 12193 000104D4 B801000000          <1> 	mov	eax, ERR_BAD_CMD_ARG ; 01h ; TRDOS 8086
 12194 000104D9 A3[1C010300]        <1> 	mov	[u.r0], eax
 12195 000104DE E96CC8FFFF          <1> 	jmp	error
 12196                              <1> get_argp2:
 12197                              <1> 	; 21/07/2015
 12198                              <1> 	;mov	eax, 4
 12199 000104E3 8B15[0C020300]      <1> 	mov 	edx, [nbase] ; 18/10/2015
 12200 000104E9 0105[0C020300]      <1> 	add	[nbase], eax
 12201                              <1> 	;sub	[ncount], ax
 12202                              <1> 	; 23/07/2022
 12203 000104EF 2905[10020300]      <1> 	sub	[ncount], eax
 12204                              <1> 	;
 12205 000104F5 8B02                <1> 	mov	eax, [edx]
 12206 000104F7 C3                  <1> 	retn
 12207                              <1> get_argpk:
 12208                              <1> 	; Argument is in kernel's memory space
 12209 000104F8 66C705[10020300]00- <1> 	mov	word [ncount], PAGE_SIZE ; 4096
 12209 00010500 10                  <1>
 12210 00010501 8935[0C020300]      <1> 	mov	[nbase], esi
 12211 00010507 8305[0C020300]04    <1> 	add	dword [nbase], 4
 12212 0001050E 8B06                <1> 	mov	eax, [esi] ; virtual addr. = physical addr.
 12213 00010510 C3                  <1> 	retn
 12214                              <1> get_argp3:
 12215 00010511 B103                <1> 	mov	cl, 3
 12216                              <1> get_argp4:
 12217 00010513 C1E008              <1> 	shl	eax, 8
 12218                              <1> 	;pop	dx
 12219                              <1> 	; 23/07/2022
 12220 00010516 5A                  <1> 	pop	edx
 12221 00010517 88D0                <1> 	mov 	al, dl
 12222 00010519 E2F8                <1>         loop    get_argp4
 12223                              <1> 	;pop	esi
 12224 0001051B C3                  <1> 	retn
 12225                              <1> 
 12226                              <1> 	; 23/07/2022
 12227                              <1> %if 0	
 12228                              <1> 
 12229                              <1> sysstat: 
 12230                              <1> 	; 13/01/2017 - TRDOS 386 (TRDOS v2.0)
 12231                              <1> 	; temporary !
 12232                              <1> 	mov	eax, ERR_INV_FNUMBER ; 'invalid function number !'
 12233                              <1>         mov     [u.error], eax
 12234                              <1>         mov     [u.r0], eax 
 12235                              <1> 	jmp	error
 12236                              <1> 
 12237                              <1> sysfstat: 
 12238                              <1> 	; 13/01/2017 - TRDOS 386 (TRDOS v2.0)
 12239                              <1> 	; temporary !
 12240                              <1> 	mov	eax, ERR_INV_FNUMBER ; 'invalid function number !'
 12241                              <1>         mov     [u.error], eax
 12242                              <1>         mov     [u.r0], eax 
 12243                              <1> 	jmp	error
 12244                              <1> 
 12245                              <1> %endif
 12246                              <1> 
 12247                              <1> fclose:
 12248                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
 12249                              <1> 	; 06/10/2016 (TRDOS 386 = TRDOS v2.0)
 12250                              <1> 	;
 12251                              <1> 	; 18/06/2015 (Retro UNIX 386 v1 - Beginning)
 12252                              <1> 	;            (32 bit offset pointer modification)
 12253                              <1> 	; 19/04/2013 - 12/01/2014 (Retro UNIX 8086 v1)
 12254                              <1> 	;
 12255                              <1> 	; Given the file descriptor (index to the u.fp list)
 12256                              <1> 	; 'fclose' first gets the i-number of the file via 'getf'.
 12257                              <1> 	; If i-node is active (i-number > 0) the entry in 
 12258                              <1> 	; u.fp list is cleared. If all the processes that opened
 12259                              <1> 	; that file close it, then fsp etry is freed and the file
 12260                              <1> 	; is closed. If not a return is taken. 
 12261                              <1> 	; If the file has been deleted while open, 'anyi' is called
 12262                              <1> 	; to see anyone else has it open, i.e., see if it is appears
 12263                              <1> 	; in another entry in the fsp table. Upon return from 'anyi'
 12264                              <1> 	; a check is made to see if the file is special.
 12265                              <1> 	;
 12266                              <1> 	; INPUTS ->
 12267                              <1> 	;    r1 - contains the file descriptor (value=0,1,2...)
 12268                              <1> 	;    u.fp - list of entries in the fsp table
 12269                              <1> 	;    fsp - table of entries (4 words/entry) of open files. 
 12270                              <1> 	; OUTPUTS ->
 12271                              <1> 	;    r1 - contains the same file descriptor
 12272                              <1> 	;    r2 - contains i-number
 12273                              <1> 	;
 12274                              <1> 	; ((AX = R1))
 12275                              <1> 	; ((Modified registers: EDX, EBX, ECX, ESI, EDI, EBP))
 12276                              <1> 	;
 12277                              <1> 	; Retro UNIX 8086 v1 modification : CF = 1
 12278                              <1> 	;              if i-number of the file is 0. (error)
 12279                              <1> 	;
 12280                              <1> 	; TRDOS 386 (06/10/2016)
 12281                              <1> 	; 
 12282                              <1> 	; INPUT:
 12283                              <1> 	;	EAX = File Handle (File Descriptor, File Index)
 12284                              <1> 	;
 12285                              <1> 	; OUTPUT:
 12286                              <1> 	;	CF = 1 -> File not open !
 12287                              <1> 	;	CF = 0 -> OK!
 12288                              <1> 	;	     EBX = File Number (System)
 12289                              <1> 	;	     [cdev] = Logical DOS Drive Number
 12290                              <1> 	;	     EAX = File Handle/Number (user)
 12291                              <1> 	;
 12292                              <1> 	; Modified Registers: EBX
 12293                              <1> 
 12294 0001051C 50                  <1> 	push	eax ; File handle
 12295                              <1> 	
 12296 0001051D E846000000          <1> 	call	getf
 12297                              <1> 	;jc	device_close ; eax = device number
 12298                              <1> 	; 17/04/2021 (temporary)
 12299 00010522 7306                <1> 	jnc	short _fclose_0
 12300 00010524 58                  <1> 	pop	eax
 12301 00010525 E943CFFFFF          <1> 	jmp	rw2 ; file not open !
 12302                              <1> _fclose_0:
 12303 0001052A 80BB[A4840100]01    <1> 	cmp	byte [ebx+OF_MODE], 1 ; open mode ; 0 = empty entry
 12304 00010531 722C                <1> 	jb	short fclose_1	      ; 1 = read, 2 = write
 12305                              <1> 	
 12306 00010533 83F801              <1> 	cmp	eax, 1 ; is the first cluster number > 0
 12307 00010536 7227                <1> 	jb	short fclose_1 ; no, this is empty entry
 12308                              <1> 
 12309                              <1> fclose_0:
 12310 00010538 FE8B[E4840100]      <1> 	dec	byte [ebx+OF_OPENCOUNT] ; decrement the number of processes 
 12311                              <1> 			                ; that have opened the file
 12312 0001053E 791F                <1> 	jns	short fclose_1 ; jump if not negative (jump if bit 7 is 0)	 
 12313                              <1> 			; if all processes haven't closed the file, return
 12314                              <1> 	;
 12315                              <1> 	; eax ; First cluster
 12316 00010540 31C0                <1> 	xor	eax, eax ; 0
 12317 00010542 8883[A4840100]      <1> 	mov	[ebx+OF_MODE], al ; 0 = empty entry
 12318                              <1> 	;mov	[ebx+OF_STATUS], al ; 0 = empty entry
 12319                              <1> 	;shl	bx, 2 
 12320                              <1> 	; 23/07/2022
 12321                              <1> 	;shl	bl, 2
 12322 00010548 C1E302              <1> 	shl	ebx, 2
 12323 0001054B 8983[04840100]      <1> 	mov	[ebx+OF_FCLUSTER], eax ; 0
 12324 00010551 8983[84870100]      <1> 	mov	[ebx+OF_CCLUSTER], eax ; 0
 12325                              <1> 	;mov	[ebx+OF_CCINDEX], eax ; 0
 12326                              <1> 	; 23/07/2022
 12327                              <1> 	;mov	[ebx+OF_OPENCOUNT], al ; 0
 12328 00010557 A3[30010300]        <1> 	mov	[u.fofp], eax ; 0
 12329                              <1> 	;shr	bx, 2
 12330                              <1> 	; 23/07/2022
 12331                              <1> 	;shr	bl, 2
 12332 0001055C C1EB02              <1> 	shr	ebx, 2
 12333                              <1> fclose_1: ; 1:
 12334 0001055F 58                  <1> 	pop	eax ; File handle (File Descriptor, File Index)
 12335 00010560 C680[26010300]00    <1> 	mov	byte [eax+u.fp], 0 ; clear that entry in the u.fp list
 12336 00010567 C3                  <1> 	retn
 12337                              <1> 
 12338                              <1> getf:
 12339                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
 12340                              <1> 	; 17/04/2021 - TRDOS 386 v2.0.4
 12341                              <1> 	;	(temporary modifications)
 12342                              <1> 	; 12/10/2016
 12343                              <1> 	; 11/10/2016
 12344                              <1> 	; 08/10/2016
 12345                              <1> 	; 06/10/2016 (TRDOS 386 = TRDOS v2.0)
 12346                              <1> 	; / get the device number and the i-number of an open file
 12347                              <1> 	; 13/05/2015
 12348                              <1> 	; 11/05/2015 (Retro UNIX 386 v1 - Beginning)
 12349                              <1> 	; 19/04/2013 - 18/11/2013 (Retro UNIX 8086 v1)
 12350                              <1> 	;
 12351 00010568 89C3                <1> 	mov	ebx, eax
 12352                              <1> getf1: 
 12353 0001056A 83FB0A              <1> 	cmp	ebx, 10
 12354 0001056D 730A                <1>         jnb	short getf2
 12355 0001056F 8A9B[26010300]      <1> 	mov	bl, [ebx+u.fp]
 12356 00010575 08DB                <1> 	or	bl, bl
 12357 00010577 7503                <1> 	jnz	short getf3
 12358                              <1> getf2:
 12359                              <1> 	; 'File not open !' error (ax=0)
 12360 00010579 29C0                <1> 	sub	eax, eax
 12361 0001057B C3                  <1> 	retn
 12362                              <1> getf3:	
 12363                              <1> 	; 23/07/2022
 12364                              <1> 	;test	bl, 80h
 12365                              <1> 	;jnz	short getf5 ; device
 12366 0001057C FECB                <1> 	dec	bl ; 0 based
 12367 0001057E 8A83[84840100]      <1> 	mov	al, [ebx+OF_DRIVE]
 12368 00010584 A2[01010300]        <1> 	mov	[cdev], al
 12369 00010589 C0E302              <1> 	shl	bl, 2 ; *4 (dword offset)
 12370                              <1> 	; 23/07/2022
 12371                              <1> 	;shl	ebx, 2
 12372 0001058C 8B83[84850100]      <1> 	mov	eax, [ebx+OF_SIZE]
 12373 00010592 A3[24020300]        <1> 	mov	[i.size], eax ; file size
 12374 00010597 8D83[04850100]      <1> 	lea	eax, [ebx+OF_POINTER] ; 12/10/2016
 12375 0001059D A3[30010300]        <1> 	mov	[u.fofp], eax
 12376 000105A2 8B83[04840100]      <1> 	mov	eax, [ebx+OF_FCLUSTER]
 12377 000105A8 C0EB02              <1> 	shr	bl, 2 ; /4 (byte offset)
 12378                              <1> 	; 23/07/2022
 12379                              <1> 	;shr	ebx, 2
 12380                              <1> 	; 17/04/2021
 12381 000105AB F8                  <1> 	clc 
 12382                              <1> getf4:
 12383 000105AC C3                  <1> 	retn
 12384                              <1> ;getf5: 
 12385                              <1> 	; 17/04/2021
 12386                              <1> 	; (following code is disabled as temporary)
 12387                              <1> 	;
 12388                              <1> 	;; get device number
 12389                              <1> 	;and	bl, 7Fh ; 1 to 7Fh
 12390                              <1> 	;dec	bl ; 0 based (0 to 7Eh)
 12391                              <1> 	;mov	al, [ebx+DEV_DRIVER]
 12392                              <1> 	;mov	ch, [ebx+DEV_ACCESS]
 12393                              <1> 	;mov	cl, [ebx+DEV_OPENMODE]
 12394                              <1> 	;and	ch, 0FEh ; reset bit 0 ; dev_close
 12395                              <1> 	;
 12396                              <1> 	; 23/07/2022
 12397                              <1> 	;stc ; cf = 1 
 12398                              <1> 	;retn
 12399                              <1> 
 12400                              <1> trans_addr_nmbp:
 12401                              <1> 	; 18/10/2015
 12402                              <1> 	; 12/10/2015
 12403 000105AD 8B2D[38010300]      <1> 	mov 	ebp, [u.namep]
 12404                              <1> trans_addr_nm: 
 12405                              <1> 	; Convert virtual (pathname) address to physical address
 12406                              <1> 	; (Retro UNIX 386 v1 feature only !)
 12407                              <1> 	; 18/10/2015
 12408                              <1> 	; 12/10/2015 (u.pnbase & u.pncount has been removed from code)
 12409                              <1> 	; 02/07/2015
 12410                              <1> 	; 17/06/2015
 12411                              <1> 	; 16/06/2015
 12412                              <1> 	;
 12413                              <1> 	; INPUTS: 
 12414                              <1> 	;	ebp = pathname address (virtual) ; [u.namep]
 12415                              <1> 	;	[u.pgdir] = user's page directory
 12416                              <1> 	; OUTPUT:
 12417                              <1> 	;       esi = physical address of the pathname
 12418                              <1> 	;	ecx = remain byte count in the page
 12419                              <1> 	;
 12420                              <1> 	; (Modified registers: EAX, EBX, ECX, EDX, ESI)
 12421                              <1> 	;
 12422 000105B3 833D[78010300]00    <1>         cmp     dword [u.ppgdir], 0  ; /etc/init ? (sysexec)
 12423 000105BA 7618                <1> 	jna	short trans_addr_nmk ; the caller is os kernel;
 12424                              <1> 				     ; it is already physical address
 12425 000105BC 50                  <1>    	push	eax	
 12426 000105BD 89EB                <1> 	mov	ebx, ebp ; [u.namep] ; pathname address (virtual)
 12427 000105BF E80D55FFFF          <1>        	call	get_physical_addr ; get physical address
 12428 000105C4 7204                <1> 	jc	short tr_addr_nm_err
 12429                              <1> 	; 18/10/2015
 12430                              <1> 	; eax = physical address 
 12431                              <1> 	; cx = remain byte count in page (1-4096) 
 12432                              <1> 		; 12/10/2015 (cx = [u.pncount])
 12433 000105C6 89C6                <1> 	mov	esi, eax ; 12/10/2015 (esi=[u.pnbase])
 12434 000105C8 58                  <1> 	pop	eax 
 12435 000105C9 C3                  <1> 	retn
 12436                              <1> 
 12437                              <1> tr_addr_nm_err:
 12438 000105CA A3[84010300]        <1> 	mov	[u.error], eax
 12439                              <1> 	;pop 	eax
 12440 000105CF E97BC7FFFF          <1> 	jmp	error
 12441                              <1> 
 12442                              <1> trans_addr_nmk:
 12443                              <1> 	; 12/10/2015
 12444                              <1> 	; 02/07/2015
 12445 000105D4 8B35[38010300]      <1> 	mov	esi, [u.namep]  ; [u.pnbase]
 12446 000105DA 66B90010            <1> 	mov	cx, PAGE_SIZE ; 4096 ; [u.pncount]
 12447 000105DE C3                  <1> 	retn
 12448                              <1> 
 12449                              <1> sysbreak:
 12450                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
 12451                              <1> 	; 18/10/2015
 12452                              <1> 	; 07/10/2015
 12453                              <1> 	; 23/06/2015 (Retro UNIX 386 v1 - Beginning)
 12454                              <1> 	; 20/06/2013 - 24/03/2014 (Retro UNIX 8086 v1)
 12455                              <1> 	;
 12456                              <1> 	; 'sysbreak' sets the programs break points. 
 12457                              <1> 	; It checks the current break point (u.break) to see if it is
 12458                              <1> 	; between "core" and the stack (sp). If it is, it is made an
 12459                              <1> 	; even address (if it was odd) and the area between u.break
 12460                              <1> 	; and the stack is cleared. The new breakpoint is then put
 12461                              <1> 	; in u.break and control is passed to 'sysret'.
 12462                              <1> 	;
 12463                              <1> 	; Calling sequence:
 12464                              <1> 	;	sysbreak; addr
 12465                              <1> 	; Arguments: -
 12466                              <1> 	;	
 12467                              <1> 	; Inputs: u.break - current breakpoint
 12468                              <1> 	; Outputs: u.break - new breakpoint 
 12469                              <1> 	;	area between old u.break and the stack (sp) is cleared.
 12470                              <1> 	; ...............................................................
 12471                              <1> 	;	
 12472                              <1> 	; Retro UNIX 8086 v1 modification:
 12473                              <1> 	;	The user/application program puts breakpoint address
 12474                              <1> 	;       in BX register as 'sysbreak' system call argument.
 12475                              <1> 	; 	(argument transfer method 1)
 12476                              <1> 	;
 12477                              <1> 	;  NOTE: Beginning of core is 0 in Retro UNIX 8086 v1 !
 12478                              <1> 	; 	((!'sysbreak' is not needed in Retro UNIX 8086 v1!))
 12479                              <1> 	;  NOTE:
 12480                              <1> 	; 	'sysbreak' clears extended part (beyond of previous
 12481                              <1> 	;	'u.break' address) of user's memory for original unix's
 12482                              <1> 	;	'bss' compatibility with Retro UNIX 8086 v1 (19/11/2013)
 12483                              <1> 
 12484                              <1> 		; mov u.break,r1 / move users break point to r1
 12485                              <1> 		; cmp r1,$core / is it the same or lower than core?
 12486                              <1> 		; blos 1f / yes, 1f
 12487                              <1> 	; 23/06/2015
 12488 000105DF 8B2D[4C010300]      <1> 	mov	ebp, [u.break] ; virtual address (offset)
 12489                              <1> 	;and	ebp, ebp
 12490                              <1> 	;jz	short sysbreak_3 
 12491                              <1> 	; Retro UNIX 386 v1 NOTE: u.break points to virtual address !!!
 12492                              <1> 	; (Even break point address is not needed for Retro UNIX 386 v1)
 12493 000105E5 8B15[14010300]      <1> 	mov	edx, [u.sp] ; kernel stack at the beginning of sys call
 12494 000105EB 83C20C              <1> 	add	edx, 12 ; EIP -4-> CS -4-> EFLAGS -4-> ESP (user) 
 12495                              <1> 	; 07/10/2015
 12496 000105EE 891D[4C010300]      <1> 	mov	[u.break], ebx ; virtual address !!!
 12497                              <1> 	;
 12498 000105F4 3B1A                <1> 	cmp	ebx, [edx] ; compare new break point with 
 12499                              <1> 			   ; with top of user's stack (virtual!)
 12500 000105F6 7323                <1> 	jnb	short sysbreak_3
 12501                              <1> 		; cmp r1,sp / is it the same or higher 
 12502                              <1> 			  ; / than the stack?
 12503                              <1> 		; bhis 1f / yes, 1f
 12504 000105F8 89DE                <1> 	mov	esi, ebx
 12505 000105FA 29EE                <1> 	sub	esi, ebp ; new break point - old break point
 12506 000105FC 761D                <1> 	jna	short sysbreak_3 
 12507                              <1> 	;push	ebx
 12508                              <1> sysbreak_1:
 12509 000105FE 89EB                <1> 	mov	ebx, ebp  
 12510 00010600 E8CC54FFFF          <1> 	call	get_physical_addr ; get physical address
 12511 00010605 72C3                <1> 	jc	short tr_addr_nm_err ; 23/07/2022
 12512                              <1> 	; 18/10/2015
 12513 00010607 89C7                <1> 	mov	edi, eax 
 12514 00010609 29C0                <1> 	sub	eax, eax ; 0
 12515                              <1> 		 ; ECX = remain byte count in page (1-4096)
 12516 0001060B 39CE                <1> 	cmp	esi, ecx
 12517 0001060D 7302                <1> 	jnb	short sysbreak_2
 12518 0001060F 89F1                <1> 	mov	ecx, esi
 12519                              <1> sysbreak_2:
 12520 00010611 29CE                <1> 	sub	esi, ecx
 12521 00010613 01CD                <1> 	add	ebp, ecx
 12522 00010615 F3AA                <1> 	rep 	stosb
 12523 00010617 09F6                <1> 	or	esi, esi
 12524 00010619 75E3                <1> 	jnz	short sysbreak_1
 12525                              <1> 	;
 12526                              <1> 		; bit $1,r1 / is it an odd address
 12527                              <1> 		; beq 2f / no, its even
 12528                              <1> 		; clrb (r1)+ / yes, make it even
 12529                              <1> 	; 2: / clear area between the break point and the stack
 12530                              <1> 		; cmp r1,sp / is it higher or same than the stack
 12531                              <1> 		; bhis 1f / yes, quit
 12532                              <1> 		; clr (r1)+ / clear word
 12533                              <1> 		; br 2b / go back
 12534                              <1> 	;pop	ebx
 12535                              <1> sysbreak_3: ; 1:
 12536                              <1> 	;mov	[u.break], ebx ; virtual address !!!
 12537                              <1> 		; jsr r0,arg; u.break / put the "address" 
 12538                              <1> 			; / in u.break (set new break point)
 12539                              <1> 		; br sysret4 / br sysret
 12540 0001061B E94FC7FFFF          <1> 	jmp	sysret
 12541                              <1> 
 12542                              <1> sysseek: ; / moves read write pointer in an fsp entry
 12543                              <1> 	; 06/11/2016 - TRDOS 386 (TRDOS v2.0)
 12544                              <1> 	; 22/06/2015 (Retro UNIX 386 v1 - Beginning)
 12545                              <1> 	; 07/07/2013 - 05/08/2013 (Retro UNIX 8086 v1)
 12546                              <1> 	;
 12547                              <1> 	; 'sysseek' changes the r/w pointer of (3rd word of in an
 12548                              <1> 	; fsp entry) of an open file whose file descriptor is in u.r0.
 12549                              <1> 	; The file descriptor refers to a file open for reading or
 12550                              <1> 	; writing. The read (or write) pointer is set as follows:
 12551                              <1> 	;	* if 'ptrname' is 0, the pointer is set to offset.
 12552                              <1> 	;	* if 'ptrname' is 1, the pointer is set to its
 12553                              <1> 	;	  current location plus offset.
 12554                              <1> 	;	* if 'ptrname' is 2, the pointer is set to the
 12555                              <1> 	;	  size of file plus offset.
 12556                              <1> 	; The error bit (e-bit) is set for an undefined descriptor.
 12557                              <1> 	;
 12558                              <1> 	; Calling sequence:
 12559                              <1> 	;	sysseek; offset; ptrname
 12560                              <1> 	; Arguments:
 12561                              <1> 	;	offset - number of bytes desired to move 
 12562                              <1> 	;		 the r/w pointer
 12563                              <1> 	;	ptrname - a switch indicated above
 12564                              <1> 	;
 12565                              <1> 	; Inputs: r0 - file descriptor 
 12566                              <1> 	; Outputs: -
 12567                              <1> 	; ...............................................................
 12568                              <1> 	;	
 12569                              <1> 	; Retro UNIX 8086 v1 modification: 
 12570                              <1> 	;       'sysseek' system call has three arguments; so,
 12571                              <1> 	;	* 1st argument, file descriptor is in BX (BL) register
 12572                              <1> 	;	* 2nd argument, offset is in CX register
 12573                              <1> 	;	* 3rd argument, ptrname/switch is in DX (DL) register
 12574                              <1> 
 12575 00010620 E821000000          <1> 	call	seektell
 12576                              <1> 	; EAX = Current R/W pointer of the file
 12577                              <1> 	; EBX = [u.fofp]
 12578                              <1> 	; [u.base] = offset (ECX input)
 12579                              <1> 
 12580 00010625 0305[40010300]      <1> 	add	eax, [u.base]
 12581 0001062B 8903                <1> 	mov	[ebx], eax
 12582 0001062D E93DC7FFFF          <1> 	jmp	sysret
 12583                              <1> 
 12584                              <1> systell: ; / get the r/w pointer
 12585                              <1> 	; 06/11/2016 - TRDOS 386 (TRDOS v2.0) - temporary !-
 12586                              <1> 	; 22/06/2015 (Retro UNIX 386 v1 - Beginning)
 12587                              <1> 	; 07/07/2013 - 05/08/2013 (Retro UNIX 8086 v1)
 12588                              <1> 	;
 12589                              <1> 	; Retro UNIX 8086 v1 modification:
 12590                              <1> 	; ! 'systell' does not work in original UNIX v1,
 12591                              <1> 	; 	    it returns with error !
 12592                              <1> 	; Inputs: r0 - file descriptor 
 12593                              <1> 	; Outputs: r0 - file r/w pointer
 12594                              <1> 
 12595                              <1> 	;xor	ecx, ecx ; 0
 12596 00010632 BA01000000          <1> 	mov	edx, 1 ; 05/08/2013
 12597                              <1> 	;call 	seektell
 12598 00010637 E810000000          <1> 	call 	seektell0 ; 05/08/2013
 12599                              <1> 	;; 06/11/2016
 12600                              <1> 	;; mov	eax, [ebx]
 12601 0001063C A3[1C010300]        <1> 	mov	[u.r0], eax
 12602 00010641 E929C7FFFF          <1> 	jmp	sysret
 12603                              <1> 
 12604                              <1> ; Original unix v1 'systell' system call:
 12605                              <1> 		; jsr r0,seektell
 12606                              <1> 		; br error4
 12607                              <1> 
 12608                              <1> seektell:
 12609                              <1> 	; 06/11/2016 - TRDOS 386 (TRDOS v2.0)
 12610                              <1> 	; 03/01/2016
 12611                              <1> 	; 22/06/2015 (Retro UNIX 386 v1 - Beginning)
 12612                              <1> 	; 07/07/2013 - 05/08/2013 (Retro UNIX 8086 v1)
 12613                              <1> 	;
 12614                              <1> 	; 'seektell' puts the arguments from sysseek and systell
 12615                              <1> 	; call in u.base and u.count. It then gets the i-number of
 12616                              <1> 	; the file from the file descriptor in u.r0 and by calling
 12617                              <1> 	; getf. The i-node is brought into core and then u.count
 12618                              <1> 	; is checked to see it is a 0, 1, or 2.
 12619                              <1> 	; If it is 0 - u.count stays the same
 12620                              <1> 	;          1 - u.count = offset (u.fofp)
 12621                              <1> 	;	   2 - u.count = i.size (size of file)
 12622                              <1> 	; 	 		
 12623                              <1> 	; !! Retro UNIX 8086 v1 modification:
 12624                              <1> 	;	Argument 1, file descriptor is in BX;
 12625                              <1> 	;	Argument 2, offset is in CX;
 12626                              <1> 	;	Argument 3, ptrname/switch is in DX register.	
 12627                              <1> 	;
 12628                              <1> 	; ((Return -> eax = base for offset (position= base+offset))
 12629                              <1> 	;
 12630 00010646 890D[40010300]      <1> 	mov 	[u.base], ecx ; offset
 12631                              <1> seektell0:
 12632 0001064C 8915[44010300]      <1> 	mov 	[u.count], edx
 12633                              <1> 	; EBX = file descriptor (file number)
 12634 00010652 E813FFFFFF          <1> 	call	getf1
 12635                              <1> 	; EAX = First cluster of the file
 12636                              <1> 	; EBX = File number (Open file number)
 12637                              <1> 	; [u.fofp] = Pointer to File pointer
 12638                              <1> 	; [i.size] = File size
 12639                              <1> 
 12640 00010657 09C0                <1> 	or	eax, eax
 12641 00010659 7514                <1> 	jnz	short seektell1
 12642                              <1> 
 12643 0001065B B80A000000          <1> 	mov	eax, ERR_FILE_NOT_OPEN
 12644 00010660 A3[1C010300]        <1> 	mov	[u.r0], eax 
 12645 00010665 A3[84010300]        <1> 	mov	dword [u.error], eax ; 'file not open !'
 12646 0001066A E9E0C6FFFF          <1> 	jmp	error
 12647                              <1> 
 12648                              <1> seektell1:
 12649 0001066F 8B1D[30010300]      <1>         mov     ebx, [u.fofp]
 12650 00010675 803D[44010300]01    <1> 	cmp	byte [u.count], 1
 12651 0001067C 7705                <1> 	ja	short seektell2
 12652 0001067E 7409                <1> 	je	short seektell3
 12653 00010680 31C0                <1> 	xor	eax, eax
 12654 00010682 C3                  <1> 	retn
 12655                              <1> 
 12656                              <1> seektell2:
 12657 00010683 A1[24020300]        <1>         mov   	eax, [i.size]
 12658 00010688 C3                  <1> 	retn
 12659                              <1> 
 12660                              <1> seektell3:
 12661 00010689 8B03                <1> 	mov	eax, [ebx]
 12662 0001068B C3                  <1> 	retn
 12663                              <1> 
 12664                              <1> sysintr: ; / set interrupt handling
 12665                              <1> 	; 22/06/2015 (Retro UNIX 386 v1 - Beginning)
 12666                              <1> 	; 07/07/2013 (Retro UNIX 8086 v1)
 12667                              <1> 	;
 12668                              <1> 	; 'sysintr' sets the interrupt handling value. It puts
 12669                              <1> 	; argument of its call in u.intr then branches into 'sysquit'
 12670                              <1> 	; routine. u.tty is checked if to see if a control tty exists.
 12671                              <1> 	; If one does the interrupt character in the tty buffer is
 12672                              <1> 	; cleared and 'sysret'is called. If one does not exits
 12673                              <1> 	; 'sysret' is just called.
 12674                              <1> 	;
 12675                              <1> 	; Calling sequence:
 12676                              <1> 	;	sysintr; arg
 12677                              <1> 	; Argument:
 12678                              <1> 	;	arg - if 0, interrupts (ASCII DELETE) are ignored.
 12679                              <1> 	;	    - if 1, intterupts cause their normal result
 12680                              <1> 	;		 i.e force an exit.
 12681                              <1> 	;	    - if arg is a location within the program,
 12682                              <1> 	;		control is passed to that location when
 12683                              <1> 	;		an interrupt occurs.
 12684                              <1> 	; Inputs: -
 12685                              <1> 	; Outputs: -
 12686                              <1> 	; ...............................................................
 12687                              <1> 	;	
 12688                              <1> 	; Retro UNIX 8086 v1 modification: 
 12689                              <1> 	;       'sysintr' system call sets u.intr to value of BX
 12690                              <1> 	;	then branches into sysquit.
 12691                              <1> 	;
 12692 0001068C 66891D[68010300]    <1> 	mov	[u.intr], bx
 12693                              <1> 		; jsr r0,arg; u.intr / put the argument in u.intr
 12694                              <1> 		; br 1f / go into quit routine
 12695 00010693 E9D7C6FFFF          <1> 	jmp	sysret
 12696                              <1> 
 12697                              <1> sysquit:
 12698                              <1> 	; 22/06/2015 (Retro UNIX 386 v1 - Beginning)
 12699                              <1> 	; 07/07/2013 (Retro UNIX 8086 v1)
 12700                              <1> 	;
 12701                              <1> 	; 'sysquit' turns off the quit signal. it puts the argument of
 12702                              <1> 	; the call in u.quit. u.tty is checked if to see if a control 
 12703                              <1> 	; tty exists. If one does the interrupt character in the tty
 12704                              <1> 	; buffer is cleared and 'sysret'is called. If one does not exits
 12705                              <1> 	; 'sysret' is just called.
 12706                              <1> 	;
 12707                              <1> 	; Calling sequence:
 12708                              <1> 	;	sysquit; arg
 12709                              <1> 	; Argument:
 12710                              <1> 	;	arg - if 0, this call diables quit signals from the
 12711                              <1> 	;		typewriter (ASCII FS)
 12712                              <1> 	;	    - if 1, quits are re-enabled and cause execution to
 12713                              <1> 	;		cease and a core image to be produced.
 12714                              <1> 	;		 i.e force an exit.
 12715                              <1> 	;	    - if arg is an addres in the program,
 12716                              <1> 	;		a quit causes control to sent to that
 12717                              <1> 	;		location.
 12718                              <1> 	; Inputs: -
 12719                              <1> 	; Outputs: -
 12720                              <1> 	; ...............................................................
 12721                              <1> 	;	
 12722                              <1> 	; Retro UNIX 8086 v1 modification: 
 12723                              <1> 	;       'sysquit' system call sets u.quit to value of BX
 12724                              <1> 	;	then branches into 'sysret'.
 12725                              <1> 	;
 12726 00010698 66891D[6A010300]    <1> 	mov	[u.quit], bx
 12727 0001069F E9CBC6FFFF          <1> 	jmp	sysret
 12728                              <1> 		; jsr r0,arg; u.quit / put argument in u.quit
 12729                              <1> 	;1:
 12730                              <1> 		; mov u.ttyp,r1 / move pointer to control tty buffer
 12731                              <1> 			      ; / to r1
 12732                              <1> 		; beq sysret4 / return to user
 12733                              <1> 		; clrb 6(r1) / clear the interrupt character 
 12734                              <1> 			   ; / in the tty buffer
 12735                              <1> 		; br sysret4 / return to user
 12736                              <1> 
 12737                              <1> %if 0
 12738                              <1> 
 12739                              <1> anyi: 
 12740                              <1> 	; 23/07/2022
 12741                              <1> 	; 06/10/2016 (TRDOS 386 = TRDOS v2.0)
 12742                              <1> 	; Major Modification!
 12743                              <1> 	; TRDOS 386 does not permit to delete a file while it is open 
 12744                              <1> 	; The role of 'anyi' procedure has beeen changed to ensure that.
 12745                              <1> 	; 	
 12746                              <1> 	; 22/06/2015 (Retro UNIX 386 v1 - Beginning)
 12747                              <1> 	; 25/04/2013 (Retro UNIX 8086 v1)
 12748                              <1> 	;
 12749                              <1> 	; 'anyi' is called if a file deleted while open.
 12750                              <1> 	; "anyi" checks to see if someone else has opened this file.
 12751                              <1> 	;
 12752                              <1> 	; INPUTS ->
 12753                              <1> 	;    r1 - contains an i-number
 12754                              <1> 	;    fsp - start of table containing open files
 12755                              <1> 	;
 12756                              <1> 	; OUTPUTS ->
 12757                              <1> 	;    "deleted" flag set in fsp entry of another occurrence of
 12758                              <1> 	;	   this file and r2 points 1st word of this fsp entry.
 12759                              <1> 	;    if file not found - bit in i-node map is cleared
 12760                              <1> 	;    			 (i-node is freed)
 12761                              <1> 	;               all blocks related to i-node are freed
 12762                              <1> 	;	        all flags in i-node are cleared
 12763                              <1> 	; ((AX = R1)) input
 12764                              <1> 	;
 12765                              <1> 	;    (Retro UNIX Prototype : 02/12/2012, UNIXCOPY.ASM)
 12766                              <1>         ;    ((Modified registers: EDX, ECX, EBX, ESI, EDI, EBP))
 12767                              <1> 	;
 12768                              <1> 	; / r1 contains an i-number
 12769                              <1> 
 12770                              <1> 	; TRDOS 386 (06/10/2016)
 12771                              <1> 	; 
 12772                              <1> 	; INPUT:
 12773                              <1> 	;	EAX = First Cluster
 12774                              <1> 	;	 DL = Logical DOS Drive Number
 12775                              <1> 	;
 12776                              <1> 	; OUTPUT:
 12777                              <1> 	;	CF = 1 -> EBX = File Handle/Number/Index
 12778                              <1> 	;	CF = 0 -> EBX = 0
 12779                              <1> 	;
 12780                              <1> 	; Modified Registers: EBX
 12781                              <1> 
 12782                              <1> 	xor	ebx, ebx
 12783                              <1> anyi_0: 
 12784                              <1> 	cmp	byte [ebx+OF_MODE], 0 ; 0 = empty entry
 12785                              <1> 	ja	short anyi_2 ; 1 (r), 2 (w) or 3 (r&w)
 12786                              <1> anyi_1:
 12787                              <1> 	inc	bl
 12788                              <1> 	cmp	bl, OPENFILES ; max. count of open files
 12789                              <1> 	jb	short anyi_0
 12790                              <1> 	xor	eax, eax
 12791                              <1> 	retn 
 12792                              <1> anyi_2:
 12793                              <1> 	cmp	dl, [ebx+OF_DRIVE]
 12794                              <1> 	jne	short anyi_1
 12795                              <1> 	;shl	bx, 2 ; *4 (dword offset)
 12796                              <1> 	shl	ebx, 2 ; 23/07/2022
 12797                              <1> 	cmp	eax, [ebx+OF_FCLUSTER]
 12798                              <1> 	je	short anyi_3
 12799                              <1> 	;shr	bx, 2 ; /4 (byte offset)
 12800                              <1> 	shr	ebx, 2 ; 23/07/2022
 12801                              <1> 	jmp	short anyi_1 	
 12802                              <1> anyi_3:
 12803                              <1> 	;shr	bx, 2 ; /4 (bytes offset) (index)
 12804                              <1> 	shr	ebx, 2 ; 23/07/2022
 12805                              <1> 	stc
 12806                              <1> 	retn
 12807                              <1> 
 12808                              <1> %endif
 12809                              <1> 
 12810                              <1> ; Retro UNIX 386 v1 Kernel (v0.2) - SYS9.INC
 12811                              <1> ; Last Modification: 09/12/2015
 12812                              <1> 
 12813                              <1> syssleep:
 12814                              <1> 	; 24/07/2022 - TRDOS 386 v2.0.5
 12815                              <1> 	; 29/06/2015 - (Retro UNIX 386 v1)
 12816                              <1> 	; 11/06/2014 - (Retro UNIX 8086 v1)
 12817                              <1> 	;
 12818                              <1> 	; Retro UNIX 8086 v1 feature only
 12819                              <1> 	; (INPUT -> none)
 12820                              <1> 	
 12821                              <1> 	; Temporary - 24/07/2022
 12822 000106A4 891D[1C010300]      <1> 	mov	[u.r0], ebx
 12823                              <1> 	;
 12824 000106AA 0FB61D[6D010300]    <1> 	movzx	ebx, byte [u.uno] ; process number
 12825 000106B1 8AA3[3F000300]      <1> 	mov	ah, [ebx+p.ttyc-1] ; current/console tty
 12826 000106B7 E8D9160000          <1> 	call	sleep
 12827                              <1> 	; 24/07/2022
 12828 000106BC FF05[1C010300]      <1> 	inc	dword [u.r0] ; Temporary ! 
 12829 000106C2 E9A8C6FFFF          <1> 	jmp	sysret
 12830                              <1> 
 12831                              <1> _vp_clr:
 12832                              <1> 	; Reset/Clear Video Page
 12833                              <1> 	;
 12834                              <1> 	; 24/07/2022 - TRDOS 386 v2.0.5
 12835                              <1> 	; 30/06/2015 - (Retro UNIX 386 v1)
 12836                              <1> 	; 21/05/2013 - 30/10/2013(Retro UNIX 8086 v1) (U0.ASM)
 12837                              <1> 	;
 12838                              <1> 	; Retro UNIX 8086 v1 feature only !
 12839                              <1> 	;
 12840                              <1> 	; INPUTS -> 
 12841                              <1> 	;   BH = video page number	 
 12842                              <1> 	;
 12843                              <1> 	; OUTPUT ->
 12844                              <1> 	;   none
 12845                              <1> 	; ((Modified registers: EAX, BH, ECX, EDX, ESI, EDI))
 12846                              <1> 	;
 12847                              <1> 	; 04/12/2013
 12848 000106C7 28C0                <1> 	sub	al, al
 12849                              <1> 	; al = 0 (clear video page)
 12850                              <1> 	; bh = video page ; 13/05/2016
 12851 000106C9 B407                <1> 	mov	ah, 07h
 12852                              <1> 	; ah = 7 (attribute/color)
 12853                              <1> 	;xor 	cx, cx ; 0, left upper column (cl) & row (cl)
 12854                              <1> 	;mov	dx, 184Fh ; right lower column & row (dl=24, dh=79)
 12855                              <1> 	; 24/07/2022
 12856 000106CB 31C9                <1> 	xor	ecx, ecx
 12857 000106CD BA4F180000          <1> 	mov	edx, 184Fh
 12858 000106D2 E8EC18FFFF          <1> 	call	_scroll_up
 12859                              <1> 	; bh = video page
 12860                              <1> 	;xor	dx, dx ; 0 (cursor position) 
 12861                              <1> 	; 24/07/2022
 12862 000106D7 31D2                <1> 	xor	edx, edx
 12863 000106D9 E92B1CFFFF          <1> 	jmp 	_set_cpos
 12864                              <1> 
 12865                              <1> sysmsg:
 12866                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
 12867                              <1> 	; 07/12/2020
 12868                              <1> 	; 05/12/2020
 12869                              <1> 	; 13/05/2016
 12870                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
 12871                              <1> 	; 01/07/2015 - 11/11/2015 (Retro UNIX 386 v1)
 12872                              <1> 	; Print user-application message on user's console tty
 12873                              <1> 	;
 12874                              <1> 	; Input -> EBX = Message address
 12875                              <1> 	;	   ECX = Message length (max. 255)
 12876                              <1> 	;	   DL = Color (IBM PC Rombios color attributes)
 12877                              <1> 	;
 12878 000106DE 81F9FF000000        <1> 	cmp	ecx, MAX_MSG_LEN ; 255
 12879                              <1> 	;ja	sysret ; nothing to do with big message size
 12880                              <1> 	; 23/07/2022
 12881 000106E4 7605                <1> 	jna	short sysmsg8
 12882                              <1> sysmsg7:
 12883 000106E6 E984C6FFFF          <1> 	jmp	sysret
 12884                              <1> sysmsg8:	; 23/07/2022
 12885 000106EB 08C9                <1> 	or	cl, cl
 12886                              <1> 	;jz	sysret
 12887                              <1> 	; 23/07/2022
 12888 000106ED 74F7                <1> 	jz	short sysmsg7
 12889 000106EF 20D2                <1> 	and	dl, dl
 12890 000106F1 7502                <1> 	jnz	short sysmsg0
 12891 000106F3 B207                <1> 	mov	dl, 07h ; default color
 12892                              <1> 		; (black background, light gray character) 
 12893                              <1> sysmsg0:
 12894 000106F5 891D[40010300]      <1> 	mov	[u.base], ebx
 12895 000106FB 8815[77770100]      <1> 	mov	[ccolor], dl ; color attributes
 12896 00010701 89E5                <1> 	mov	ebp, esp
 12897 00010703 31DB                <1> 	xor	ebx, ebx ; 0
 12898 00010705 891D[48010300]      <1> 	mov	[u.nread], ebx ; 0
 12899                              <1> 	;
 12900 0001070B 381D[82010300]      <1> 	cmp	[u.kcall], bl ; 0
 12901 00010711 776F                <1> 	ja	short sysmsgk ; Temporary (01/07/2015)
 12902                              <1> 	;
 12903 00010713 890D[44010300]      <1> 	mov	[u.count], ecx
 12904                              <1> 	;inc	ecx ; + 00h ; ASCIIZ
 12905                              <1> 	;
 12906                              <1> 	; 07/12/2020
 12907                              <1> 	;add	ecx, 3
 12908 00010719 6683C103            <1> 	add	cx, 3
 12909 0001071D 80E1FC              <1> 	and	cl, ~3  ; not 3
 12910                              <1> 	;
 12911 00010720 29CC                <1> 	sub	esp, ecx
 12912 00010722 89E7                <1> 	mov	edi, esp
 12913 00010724 89E6                <1> 	mov	esi, esp
 12914 00010726 66891D[80010300]    <1> 	mov	[u.pcount], bx ; reset page (phy. addr.) counter
 12915                              <1> 	; 11/11/2015
 12916 0001072D 8A25[50010300]      <1> 	mov 	ah, [u.ttyp] ; recent open tty
 12917                              <1> 	; 0 = none
 12918 00010733 FECC                <1> 	dec	ah
 12919 00010735 790C                <1> 	jns	short sysmsg1 
 12920 00010737 8A1D[6D010300]      <1> 	mov	bl, [u.uno] ; process number	
 12921 0001073D 8AA3[3F000300]      <1> 	mov	ah, [ebx+p.ttyc-1] ; user's (process's) console tty
 12922                              <1> sysmsg1:
 12923 00010743 8825[52010300]      <1> 	mov	[u.ttyn], ah
 12924                              <1> sysmsg2:
 12925 00010749 E8FC050000          <1> 	call	cpass
 12926 0001074E 7416                <1> 	jz	short sysmsg5
 12927 00010750 AA                  <1> 	stosb
 12928 00010751 20C0                <1> 	and	al, al
 12929 00010753 75F4                <1> 	jnz	short sysmsg2
 12930                              <1> sysmsg3:
 12931 00010755 80FC07              <1> 	cmp	ah, 7 ; tty number
 12932 00010758 7711                <1> 	ja	short sysmsg6 ; serial port
 12933 0001075A E83E000000          <1> 	call	print_cmsg ; 05/12/2020
 12934                              <1> sysmsg4:
 12935 0001075F 89EC                <1> 	mov	esp, ebp	
 12936 00010761 E909C6FFFF          <1> 	jmp	sysret
 12937                              <1> sysmsg5:
 12938 00010766 C60700              <1> 	mov	byte [edi], 0
 12939 00010769 EBEA                <1> 	jmp	short sysmsg3
 12940                              <1> sysmsg6:
 12941 0001076B 8A06                <1> 	mov	al, [esi]
 12942 0001076D E823160000          <1> 	call	sndc
 12943 00010772 72EB                <1> 	jc	short sysmsg4
 12944 00010774 803E00              <1> 	cmp	byte [esi], 0  ; 0 is stop character
 12945 00010777 76E6                <1> 	jna	short sysmsg4
 12946 00010779 46                  <1> 	inc 	esi
 12947 0001077A 8A25[52010300]      <1> 	mov	ah, [u.ttyn]
 12948 00010780 EBE9                <1> 	jmp	short sysmsg6
 12949                              <1> 
 12950                              <1> sysmsgk: ; Temporary (01/07/2015)
 12951                              <1> 	; The message has been sent by Kernel (ASCIIZ string)
 12952                              <1> 	; (ECX -character count- will not be considered)
 12953 00010782 8B35[40010300]      <1> 	mov	esi, [u.base]
 12954 00010788 8A25[76770100]      <1> 	mov	ah, [ptty] ; present/current screen (video page)
 12955 0001078E 8825[52010300]      <1> 	mov	[u.ttyn], ah
 12956 00010794 C605[82010300]00    <1> 	mov	byte [u.kcall], 0
 12957 0001079B EBB8                <1> 	jmp	short sysmsg3
 12958                              <1> 	
 12959                              <1> print_cmsg: 
 12960                              <1> 	; 08/12/2020
 12961                              <1> 	; 07/12/2020
 12962                              <1> 	; 05/12/2020
 12963                              <1> 	; 18/11/2017
 12964                              <1> 	; 13/05/2016 - TRDOS 386 (TRDOS v2.0)
 12965                              <1> 	; 01/07/2015 (Retro UNIX 386 v1)
 12966                              <1> 	;
 12967                              <1> 	; print message (on user's console tty) 
 12968                              <1> 	;	with requested color
 12969                              <1> 	;
 12970                              <1> 	; INPUTS:
 12971                              <1> 	;	esi = message address
 12972                              <1> 	;	[u.ttyn] = tty number (0 to 7)
 12973                              <1> 	;	[ccolor] = color attributes (IBM PC BIOS colors)
 12974                              <1> 	;
 12975                              <1> 	; Modified registers: eax, ebx, ecx, edx, esi, edi
 12976                              <1> 	; (ebp must be preserved)
 12977                              <1> 
 12978                              <1> 	;mov	bh, ah
 12979 0001079D 8A3D[52010300]      <1> 	mov	bh, [u.ttyn]
 12980 000107A3 8A1D[77770100]      <1> 	mov	bl, [ccolor] ; * ; 05/12/2020
 12981                              <1> 
 12982                              <1> 	; 05/12/2020
 12983 000107A9 803D[D00F0300]00    <1> 	cmp	byte [pmi32], 0 ; is vbios's 32 bit pmi enabled ?
 12984 000107B0 772E                <1> 	ja	short pcmsg5 ; yes
 12985                              <1> pcmsg1:
 12986                              <1> 	; 08/12/2020
 12987 000107B2 8A1D[77770100]      <1> 	mov	bl, [ccolor] ; * (video.s 'u11'&'beep' change BL)
 12988                              <1> 	
 12989 000107B8 AC                  <1> 	lodsb
 12990 000107B9 20C0                <1> 	and 	al, al  ; 0
 12991 000107BB 743A                <1> 	jz 	short pcmsg2
 12992                              <1> pcmsg7:
 12993 000107BD 56                  <1> 	push 	esi
 12994                              <1> 	;mov	bl, [ccolor] ; * (video.s 'u11'&'beep' change BL)
 12995                              <1> 	; 05/12/2020
 12996                              <1> 	;;mov	bh, [u.ttyn]
 12997                              <1> 	;call 	_write_tty
 12998                              <1> 	;pop	esi
 12999                              <1> 	;jmp	short pcmsg1
 13000                              <1> ;pcmsg2:
 13001                              <1> 	;retn
 13002                              <1> 
 13003                              <1> 	; 07/12/2020
 13004 000107BE 803D[1E670000]03    <1> 	cmp     byte [CRT_MODE], 3
 13005 000107C5 7708                <1> 	ja 	short pcmsg4
 13006                              <1> pcmsg3:
 13007 000107C7 E8B81AFFFF          <1> 	call	_write_tty_m3
 13008 000107CC 5E                  <1> 	pop	esi
 13009 000107CD EBE3                <1> 	jmp	short pcmsg1
 13010                              <1> pcmsg4:
 13011 000107CF 803D[1E670000]07    <1>         cmp     byte [CRT_MODE], 7
 13012 000107D6 76EF                <1> 	jna 	short pcmsg3
 13013 000107D8 E87027FFFF          <1> 	call	vga_write_teletype
 13014 000107DD 5E                  <1> 	pop	esi
 13015 000107DE EBD2                <1> 	jmp	short pcmsg1
 13016                              <1> pcmsg5:
 13017                              <1> 	; 07/12/2020
 13018 000107E0 803D[1E670000]07    <1>         cmp     byte [CRT_MODE], 7
 13019 000107E7 76C9                <1> 	jna 	short pcmsg1
 13020                              <1> 
 13021                              <1> 	; 05/12/2020
 13022                              <1> 	; writing message by using
 13023                              <1> 	; VESA VBE3 video bios protected mode interface
 13024                              <1> 	
 13025 000107E9 B40E                <1> 	mov	ah, 0Eh
 13026                              <1> pcmsg6:
 13027 000107EB AC                  <1> 	lodsb
 13028 000107EC 20C0                <1> 	and 	al, al  ; 0
 13029 000107EE 7407                <1> 	jz 	short pcmsg2
 13030                              <1> 	; bh = video page
 13031                              <1> 	; ah = 0Eh 
 13032                              <1> 	; al = character
 13033                              <1> 	; bl = color
 13034 000107F0 E8D011FFFF          <1> 	call	int10h_32bit_pmi
 13035 000107F5 EBF4                <1> 	jmp	short pcmsg6
 13036                              <1> pcmsg2:
 13037 000107F7 C3                  <1> 	retn
 13038                              <1> 
 13039                              <1> sysgeterr:
 13040                              <1> 	; 09/12/2015
 13041                              <1> 	; 21/09/2015 - (Retro UNIX 386 v1 feature only!)
 13042                              <1> 	; Get last error number or page fault count
 13043                              <1> 	; (for debugging)
 13044                              <1> 	;
 13045                              <1> 	; Input -> EBX = return type
 13046                              <1> 	;	   0 = last error code (which is in 'u.error')	
 13047                              <1> 	;	   FFFFFFFFh = page fault count for running process
 13048                              <1> 	;	   FFFFFFFEh = total page fault count
 13049                              <1> 	;	   1 .. FFFFFFFDh = undefined 
 13050                              <1> 	;
 13051                              <1> 	; Output -> EAX = last error number or page fault count
 13052                              <1> 	;	   (depending on EBX input)
 13053                              <1> 	; 	
 13054 000107F8 21DB                <1> 	and 	ebx, ebx
 13055 000107FA 750B                <1> 	jnz	short glerr_2
 13056                              <1> glerr_0:
 13057 000107FC A1[84010300]        <1> 	mov	eax, [u.error]
 13058                              <1> glerr_1:
 13059 00010801 A3[1C010300]        <1> 	mov	[u.r0], eax
 13060 00010806 C3                  <1>  	retn
 13061                              <1> glerr_2:
 13062 00010807 43                  <1> 	inc	ebx ; FFFFFFFFh -> 0, FFFFFFFEh -> FFFFFFFFh
 13063 00010808 74FD                <1> 	jz	short glerr_2 ; page fault count for process
 13064 0001080A 43                  <1> 	inc	ebx ; FFFFFFFFh -> 0	
 13065 0001080B 75EF                <1> 	jnz	short glerr_0
 13066 0001080D A1[34030300]        <1> 	mov	eax, [PF_Count] ; total page fault count
 13067 00010812 EBED                <1>         jmp     short glerr_1
 13068                              <1> glerr_3:
 13069 00010814 A1[88010300]        <1> 	mov 	eax, [u.pfcount]
 13070 00010819 EBE6                <1> 	jmp	short glerr_1
 13071                              <1> 
 13072                              <1> load_and_run_file:
 13073                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
 13074                              <1> 	; 18/11/2017
 13075                              <1> 	; 22/01/2017
 13076                              <1> 	; 04/01/2017 - 07/01/2017
 13077                              <1> 	; 24/10/2016
 13078                              <1> 	; 24/04/2016 - 02/05/2016 - 03/05/2016 - 06/05/2016
 13079                              <1> 	; 23/04/2016 (TRDOS 386 = TRDOS v2.0)
 13080                              <1> 	; 23/10/2015 (Retro UNIX 386 v1, 'sysexec')
 13081                              <1> 	; 23/06/2015 (Retro UNIX 386 v1 - Beginning)
 13082                              <1> 	; 03/06/2013 - 06/12/2013 (Retro UNIX 8086 v1)
 13083                              <1> 	; EAX = First Cluster number
 13084                              <1> 	; EDX = File Size
 13085                              <1> 	; ESI = Argument list address
 13086                              <1> 	; [argc] = argument count
 13087                              <1> 	; [u.nread] = argument list length
 13088                              <1> 	; [esp] = return address to the caller (*)
 13089                              <1> 	;
 13090 0001081B 8935[18020300]      <1> 	mov	[argv], esi
 13091 00010821 8915[24020300]      <1> 	mov	[i.size], edx
 13092 00010827 A3[20020300]        <1> 	mov	[ii], eax
 13093                              <1> 
 13094                              <1> 	;sti	; 07/01/2017
 13095                              <1> 	;mov	eax, [k_page_dir]
 13096                              <1> 	;mov	[u.pgdir], eax
 13097 0001082C 31C0                <1> 	xor 	eax, eax ; clc ; *** ; 04/01/2017
 13098                              <1> 	;mov	[u.r0], eax ; 0 ; 07/01/2017
 13099                              <1> 
 13100                              <1> 	; 06/05/2016
 13101                              <1> 	; Set 'sysexit' return order to MainProg
 13102                              <1> 	;
 13103 0001082E 58                  <1> 	pop	eax ; * 'loc_load_and_run_file_8:' address
 13104                              <1> 	;; 22/01/2017
 13105                              <1> 	;;cli ; 07/01/2017
 13106 0001082F 8B25[E4760100]      <1> 	mov	esp, [tss.esp0]
 13107                              <1> 	;
 13108                              <1> 	; 'loc_load_run_file_8' address has 
 13109                              <1> 	; 'jmp loc_file_rw_restore_retn' instruction
 13110                              <1> 	; 'loc_file_rw_restore_retn:' will return to
 13111                              <1> 	; [mainprog_return_addr] 
 13112                              <1> 	; just after 'call command_interpreter'
 13113                              <1> 	;
 13114 00010835 68[886C0000]        <1> 	push	_end_of_mainprog ; we must not return to here !
 13115 0001083A FF35[C4830100]      <1> 	push	dword [mainprog_return_addr]
 13116 00010840 89E5                <1> 	mov	ebp, esp ; **
 13117                              <1> 	;	
 13118 00010842 9C                  <1> 	pushfd  ; EFLAGS      ; IRETD ; ***
 13119 00010843 6A08                <1> 	push	KCODE ; cs    ; IRETD
 13120 00010845 50                  <1> 	push	eax ; * (eip) ; IRETD
 13121 00010846 8925[14010300]      <1> 	mov	[u.sp], esp
 13122                              <1> 	;mov	byte [u.quant], time_count
 13123 0001084C 1E                  <1> 	push	ds
 13124 0001084D 06                  <1> 	push	es
 13125 0001084E 0FA0                <1> 	push	fs
 13126 00010850 0FA8                <1> 	push	gs	
 13127                              <1> 	;mov	eax, [u.r0]
 13128 00010852 29C0                <1> 	sub	eax, eax
 13129 00010854 60                  <1> 	pushad
 13130 00010855 68[6FCD0000]        <1> 	push	sysret
 13131                              <1> 	;push	sysrel1 ; 07/01/2017
 13132 0001085A 8925[18010300]      <1> 	mov	[u.usp], esp
 13133                              <1> 	;
 13134 00010860 E800040000          <1> 	call	wswap ; Save MainProg (process 1) 'u' structure
 13135                              <1> 		      ; and registers for return (from program)	
 13136 00010865 89EC                <1> 	mov	esp, ebp ; **
 13137                              <1> 	;;22/01/2017
 13138                              <1> 	;;sti ; 07/01/2017
 13139                              <1> 	; 23/07/2022
 13140                              <1> 	;push	eax  ; * 'loc_load_and_run_file_8:' address
 13141                              <1> 	;
 13142                              <1> 	;;; 02/05/2016
 13143                              <1> 	;;; Create a new process (parent: MainProg)	
 13144 00010867 31F6                <1> 	xor 	esi, esi
 13145                              <1> cnpm_1: ; search p.stat table for unused process number
 13146 00010869 46                  <1> 	inc	esi
 13147 0001086A 80BE[5F000300]00    <1> 	cmp	byte [esi+p.stat-1], 0 ; SFREE
 13148                              <1> 				; is process active, unused, dead
 13149 00010871 760B                <1> 	jna	short cnpm_2	; it's unused so branch
 13150 00010873 6683FE10            <1> 	cmp	si, nproc 	; all processes checked
 13151 00010877 72F0                <1> 	jb	short cnpm_1    ; no, branch back
 13152                              <1> cnpm_panic:
 13153 00010879 E98B64FFFF          <1> 	jmp	panic 
 13154                              <1> cnpm_2:
 13155 0001087E A1[74010300]        <1> 	mov	eax, [u.pgdir] ; page directory of MainProg
 13156 00010883 A3[78010300]        <1> 	mov	[u.ppgdir], eax ; parent's page directory
 13157 00010888 E8664EFFFF          <1> 	call	allocate_page
 13158                              <1> 	;jc	panic
 13159                              <1> 	; 23/07/2022
 13160 0001088D 72EA                <1> 	jc	short cnpm_panic
 13161                              <1> 	
 13162                              <1> 	; EAX = UPAGE (user structure page) address
 13163 0001088F A3[70010300]        <1> 	mov	[u.upage], eax ; memory page for 'user' struct (child)
 13164 00010894 89F7                <1> 	mov	edi, esi
 13165                              <1> 	;shl	di, 2
 13166                              <1> 	; 23/07/2022
 13167 00010896 C1E702              <1> 	shl	edi, 2
 13168 00010899 8987[6C000300]      <1> 	mov	[edi+p.upage-4], eax ; memory page for 'user' struct
 13169 0001089F E8C04EFFFF          <1> 	call	clear_page ; 03/05/2016
 13170                              <1> 	;;movzx	eax, byte [p.ttyc] ; console tty (for MainProg)
 13171                              <1> 	;sub	ax, ax ; 0
 13172                              <1> 	; 23/07/2022
 13173 000108A4 29C0                <1> 	sub	eax, eax
 13174 000108A6 668986[3F000300]    <1> 	mov     [esi+p.ttyc-1], ax ; al - set child's console tty
 13175                              <1> 				   ; ah - reset child's wait channel	
 13176 000108AD 66A3[50010300]      <1> 	mov 	[u.ttyp], ax ; 0
 13177                              <1> 	
 13178 000108B3 89F2                <1> 	mov	edx, esi
 13179 000108B5 8815[6D010300]      <1> 	mov	[u.uno], dl ; child process number
 13180 000108BB FE86[5F000300]      <1>         inc     byte [esi+p.stat-1] ; 1, SRUN
 13181                              <1> 	;shl	si, 1 ; multiply si by 2 to get index into p.pid table
 13182                              <1> 	; 23/07/2022
 13183 000108C1 D1E6                <1> 	shl	esi, 1
 13184 000108C3 66FF05[04010300]    <1> 	inc	word [mpid] ; increment m.pid; get a new process name
 13185                              <1> 
 13186                              <1> 	; 23/07/2022	
 13187                              <1> 	;mov	ax, [p.pid]  ; get process name of MainProg
 13188                              <1> 	;mov	ax, 1
 13189 000108CA FEC0                <1> 	inc	al ; eax = 1
 13190 000108CC 668986[1E000300]    <1> 	mov	[esi+p.ppid-2], ax ; put parent process name 
 13191                              <1> 			           ; in parent process slot for child
 13192 000108D3 A2[66010300]        <1> 	mov	[u.pri], al ; 1	; normal priority
 13193                              <1> 	
 13194                              <1> 	;dec	ax ; 0
 13195                              <1> 	;mov 	[u.ttyp], ax ; 0
 13196                              <1> 
 13197 000108D8 66A1[04010300]      <1> 	mov	ax, [mpid]
 13198 000108DE 668986[FEFF0200]    <1> 	mov	[esi+p.pid-2], ax ; put new process name 
 13199                              <1> 				  ; in child process' name slot
 13200                              <1> 	;;;
 13201 000108E5 A1[20020300]        <1> 	mov 	eax, [ii]
 13202                              <1> 	; 23/07/2022
 13203                              <1> 	; Retro UNIX 386 v1, 'sysexec' (u2.s)
 13204                              <1> 	;call	iopen
 13205                              <1> 	; 06/06/2016
 13206                              <1> 	;mov	byte [u.pri], 1 ; normal priority
 13207                              <1> 	;
 13208                              <1> 	;jmp	short sysexec_7 ; 02/05/2016
 13209                              <1> 	; 23/07/2022
 13210 000108EA E96DF9FFFF          <1> 	jmp	sysexec_7
 13211                              <1> 
 13212                              <1> ;	; 02/05/2016
 13213                              <1> ;	;inc	byte [sysflg] ; 0FFh -> 0
 13214                              <1> ;	;mov	byte [sysflg], 0 ; 04/01/2017
 13215                              <1> ;	movzx	ebx, byte [u.uno]
 13216                              <1> ;	shl	bl, 1 ; 13/11/2017 	
 13217                              <1> ;	cmp	word [ebx+p.ppid-2], 1 ; MainProg
 13218                              <1> ;	ja	sysret0 ; 03/05/2016
 13219                              <1> ;	push	sysret ; * 
 13220                              <1> ;	mov	[u.usp], esp
 13221                              <1> ;	call	wswap ; save child process 'u' structure and
 13222                              <1> ;		      ; registers
 13223                              <1> ;	add	dword [u.usp], 4 ; 03/05/2016 
 13224                              <1> ;sysexec_19: ; 02/05/2016
 13225                              <1> ;	retn ; * 'sysret' ; byte [sysflg] -> 0FFh
 13226                              <1> 
 13227                              <1> readi:
 13228                              <1> 	; 09/08/2022
 13229                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
 13230                              <1> 	; 01/05/2016
 13231                              <1> 	; 25/04/2016 - TRDOS 386 (TRDOS v2.0)
 13232                              <1> 	; 20/05/2015 - Retro UNIX 386 v1
 13233                              <1> 	; 11/03/2013 - 31/07/2013 (Retro UNIX 8086 v1)
 13234                              <1> 	;
 13235                              <1> 	; Reads from a file whose the first cluster number in EAX
 13236                              <1> 	; 
 13237                              <1> 	; INPUTS ->
 13238                              <1> 	;    EAX - First cluster number of the file
 13239                              <1> 	;    u.count - byte count user desires
 13240                              <1> 	;    u.base - points to user buffer
 13241                              <1> 	;    u.fofp - points to dword with current file offset
 13242                              <1> 	;    i.size - file size
 13243                              <1> 	;    cdev - logical dos drive number of the file
 13244                              <1> 	; OUTPUTS ->
 13245                              <1> 	;    u.count - cleared
 13246                              <1> 	;    u.nread - accumulates total bytes passed back
 13247                              <1> 	;
 13248                              <1> 	; ((EAX)) input/output
 13249                              <1> 	; (Retro UNIX Prototype : 14/12/2012 - 01/03/2013, UNIXCOPY.ASM)
 13250                              <1>         ; ((Modified registers: edx, ebx, ecx, esi, edi))  
 13251                              <1> 
 13252 000108EF 31D2                <1> 	xor	edx, edx ; 0
 13253 000108F1 8915[48010300]      <1> 	mov 	[u.nread], edx ; 0
 13254 000108F7 668915[80010300]    <1> 	mov	[u.pcount], dx ; 19/05/2015
 13255 000108FE 3915[44010300]      <1> 	cmp 	[u.count], edx ; 0
 13256                              <1> 	;ja 	short readi_1
 13257                              <1> 	;retn
 13258                              <1> 	; 09/08/2022
 13259 00010904 765E                <1> 	jna	short dskr_5 ; retn
 13260                              <1> ;readi_1:
 13261                              <1> dskr:
 13262                              <1> 	; 01/05/2016
 13263                              <1> 	; 25/04/2016 - TRDOS 386 (TRDOS v2.0)
 13264                              <1> 	; 24/05/2015 - 12/10/2015 (Retro UNIX 386 v1)
 13265                              <1> 	; 26/04/2013 - 03/08/2013 (Retro UNIX 8086 v1)
 13266                              <1> dskr_0:
 13267 00010906 8B15[24020300]      <1>         mov	edx, [i.size]
 13268 0001090C 8B1D[30010300]      <1> 	mov	ebx, [u.fofp]
 13269 00010912 2B13                <1> 	sub	edx, [ebx]
 13270 00010914 7647                <1> 	jna	short dskr_4
 13271                              <1> 	;
 13272 00010916 50                  <1> 	push	eax ; 01/05/2016
 13273 00010917 3B15[44010300]      <1> 	cmp     edx, [u.count] 
 13274 0001091D 7306                <1> 	jnb	short dskr_1
 13275 0001091F 8915[44010300]      <1> 	mov	[u.count], edx
 13276                              <1> dskr_1:
 13277                              <1> 	; EAX = First Cluster
 13278                              <1> 	; [Current_Drv] = Physical drive number 
 13279 00010925 E83B000000          <1> 	call	mget_r
 13280                              <1> 	; NOTE: in 'mget_r', relevant sector will be read in buffer
 13281                              <1> 	; if it is not already in buffer !
 13282 0001092A BB[40030300]        <1> 	mov	ebx, readi_buffer
 13283 0001092F 803D[82010300]00    <1> 	cmp	byte [u.kcall], 0 ; the caller is 'namei' sign (=1)
 13284 00010936 770F                <1> 	ja	short dskr_3	  ; zf=0 -> the caller is 'namei'
 13285 00010938 66833D[80010300]00  <1> 	cmp	word [u.pcount], 0
 13286 00010940 7705                <1> 	ja	short dskr_3
 13287                              <1> dskr_2:
 13288                              <1> 	; [u.base] = virtual address to transfer (as destination address)
 13289 00010942 E88D010000          <1> 	call	trans_addr_w ; translate virtual address to physical (w)
 13290                              <1> dskr_3:
 13291                              <1> 	; EBX (r5) = system (I/O) buffer address -physical-
 13292 00010947 E8F0010000          <1> 	call	sioreg
 13293 0001094C 87F7                <1> 	xchg	esi, edi
 13294                              <1> 	; EDI = file (user data) offset
 13295                              <1> 	; ESI = sector (I/O) buffer offset
 13296                              <1> 	; ECX = byte count
 13297 0001094E F3A4                <1> 	rep	movsb
 13298                              <1> 	; eax = remain bytes in buffer
 13299                              <1>         ;       (check if remain bytes in the buffer > [u.pcount])
 13300 00010950 09C0                <1> 	or	eax, eax
 13301 00010952 75EE                <1> 	jnz	short dskr_2 ; (page end before system buffer end!)
 13302 00010954 58                  <1> 	pop	eax  ; (first cluster number)
 13303 00010955 390D[44010300]      <1> 	cmp	[u.count], ecx ; 0
 13304 0001095B 77A9                <1> 	ja	short dskr_0
 13305                              <1> dskr_4:
 13306 0001095D C605[82010300]00    <1> 	mov	byte [u.kcall], 0
 13307                              <1> dskr_5:		; 23/07/2022
 13308 00010964 C3                  <1> 	retn
 13309                              <1> 
 13310                              <1> mget_r:
 13311                              <1> 	; 29/08/2023
 13312                              <1> 	; 30/07/2022
 13313                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
 13314                              <1> 	; 24/10/2016
 13315                              <1> 	; 22/10/2016
 13316                              <1> 	; 12/10/2016
 13317                              <1> 	; 29/04/2016
 13318                              <1> 	; 25/04/2016 - TRDOS 386 (TRDOS v2.0)
 13319                              <1> 	; 03/06/2015 (Retro UNIX 386 v1, 'mget', u.5s)
 13320                              <1> 	; 22/03/2013 - 31/07/2013 (Retro UNIX 8086 v1)
 13321                              <1> 	;
 13322                              <1> 	; Get existing or (allocate) a new disk block for file
 13323                              <1> 	; 
 13324                              <1> 	; INPUTS ->
 13325                              <1> 	;    [u.fofp] = file offset pointer
 13326                              <1> 	;    EAX = First Cluster
 13327                              <1> 	;    [cdev] = Logical dos drive number 	  
 13328                              <1> 	;    ([u.off] = file offset)
 13329                              <1> 	; OUTPUTS ->
 13330                              <1> 	;    EAX = logical sector number
 13331                              <1> 	;    ESI = Logical Dos Drive Description Table address	
 13332                              <1> 	;
 13333                              <1> 	; Modified registers: EDX, EBX, ECX, ESI, EDI
 13334                              <1> 
 13335 00010965 8B35[30010300]      <1> 	mov     esi, [u.fofp]
 13336 0001096B 8B1E                <1> 	mov	ebx, [esi] ; (u.off)
 13337                              <1> 
 13338 0001096D 29C9                <1> 	sub	ecx, ecx
 13339 0001096F 8A2D[01010300]      <1> 	mov	ch, [cdev]
 13340                              <1> 
 13341 00010975 BE00010900          <1> 	mov	esi, Logical_DOSDisks
 13342 0001097A 01CE                <1> 	add	esi, ecx
 13343                              <1> 
 13344 0001097C 380D[78830100]      <1> 	cmp	[readi.valid], cl ; 0
 13345 00010982 7648                <1> 	jna	short mget_r_0
 13346                              <1> 	
 13347 00010984 3A2D[79830100]      <1> 	cmp	ch, [readi.drv]
 13348 0001098A 7540                <1> 	jne	short mget_r_0
 13349                              <1> 
 13350 0001098C 3B05[8C830100]      <1> 	cmp	eax, [readi.fclust]
 13351 00010992 7561                <1> 	jne	short mget_r_3
 13352                              <1> 	
 13353 00010994 89D8                <1> 	mov	eax, ebx ; file offset
 13354 00010996 668B0D[80830100]    <1> 	mov	cx, [readi.bpc]
 13355 0001099D 41                  <1> 	inc	ecx ; <= 65536
 13356 0001099E 29D2                <1> 	sub	edx, edx
 13357 000109A0 F7F1                <1> 	div	ecx
 13358                              <1> 
 13359 000109A2 8B3D[88830100]      <1> 	mov	edi, [readi.c_index] ; cluster index
 13360                              <1> 
 13361 000109A8 39F8                <1> 	cmp	eax, edi
 13362 000109AA 7576                <1>         jne     short mget_r_4  ; (*)
 13363                              <1> 
 13364                              <1> 	; edx = byte offset in cluster (<= 65535)
 13365 000109AC 668915[82830100]    <1> 	mov	[readi.offset], dx
 13366                              <1> 	; 23/07/2022
 13367                              <1> 	;shr	dx, 9 ; / 512
 13368 000109B3 C1EA09              <1> 	shr	edx, 9
 13369 000109B6 8815[7B830100]      <1> 	mov	[readi.s_index], dl ; sector index in cluster (0 to spc -1)
 13370                              <1> 	
 13371 000109BC A1[84830100]        <1> 	mov	eax, [readi.cluster]  ; > 0 if [readi.valid] = 1
 13372 000109C1 8B15[90830100]      <1> 	mov	edx, [readi.fs_index]
 13373 000109C7 E996000000          <1>         jmp     mget_r_7
 13374                              <1> 	
 13375                              <1> mget_r_0:
 13376 000109CC 882D[79830100]      <1> 	mov	[readi.drv], ch ; physical drive number
 13377 000109D2 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
 13378 000109D6 7707                <1> 	ja	short mget_r_1
 13379 000109D8 8A4E12              <1> 	mov	cl, [esi+LD_FS_BytesPerSec+1]
 13380 000109DB D0E9                <1> 	shr	cl, 1 ;  ; 1 for 512 bytes, 4 for 2048 bytes
 13381 000109DD EB03                <1> 	jmp	short mget_r_2	
 13382                              <1> mget_r_1:
 13383 000109DF 8A4E13              <1> 	mov	cl, [esi+LD_BPB+BPB_SecPerClust]
 13384                              <1> mget_r_2:
 13385 000109E2 880D[7A830100]      <1> 	mov	[readi.spc], cl  ; sectors per cluster
 13386                              <1> 	; NOTE: readi bytes per sector value is always 512 !
 13387                              <1> 	; 23/07/2022
 13388                              <1> 	;xor	ch, ch
 13389                              <1> 	; 29/08/2023
 13390 000109E8 C1E109              <1> 	shl	ecx, 9 
 13391                              <1> 	;shl	cx, 9 ; * 512
 13392                              <1> 	;dec	cx ; bytes per cluster - 1
 13393                              <1> 	; 23/07/2022
 13394 000109EB 49                  <1> 	dec	ecx
 13395 000109EC 66890D[80830100]    <1> 	mov	[readi.bpc], cx
 13396                              <1> 	;sub	cx, cx
 13397                              <1> 	; 23/07/2022
 13398 000109F3 29C9                <1> 	sub	ecx, ecx
 13399                              <1> mget_r_3:
 13400 000109F5 A3[8C830100]        <1> 	mov	[readi.fclust], eax ; first cluster (or FDT address)
 13401 000109FA 880D[78830100]      <1> 	mov	[readi.valid], cl ; 0 
 13402                              <1> 	;mov	[readi.s_index], cl ; 0
 13403                              <1> 	;mov	[readi.offset], cx ; 0
 13404 00010A00 890D[88830100]      <1> 	mov	[readi.c_index], ecx ; 0
 13405 00010A06 890D[84830100]      <1> 	mov	[readi.cluster], ecx ; 0
 13406 00010A0C 890D[7C830100]      <1> 	mov	[readi.sector], ecx ; 0
 13407                              <1> 	
 13408 00010A12 89D8                <1> 	mov	eax, ebx ; file offset
 13409 00010A14 668B0D[80830100]    <1> 	mov	cx, [readi.bpc]
 13410 00010A1B 41                  <1> 	inc	ecx ; <= 65536
 13411 00010A1C 29D2                <1> 	sub	edx, edx
 13412 00010A1E F7F1                <1> 	div	ecx
 13413                              <1> 	;mov	edi, [readi.c_index] ; previous cluster index
 13414 00010A20 29FF                <1> 	sub	edi, edi
 13415                              <1> mget_r_4:
 13416 00010A22 A3[88830100]        <1> 	mov	[readi.c_index], eax ; cluster index
 13417                              <1> 	; edx = byte offset in cluster (<= 65535)
 13418 00010A27 668915[82830100]    <1> 	mov	[readi.offset], dx
 13419                              <1> 	; 23/07/2022
 13420                              <1> 	;shr	dx, 9 ; / 512
 13421 00010A2E C1EA09              <1> 	shr	edx, 9
 13422 00010A31 8815[7B830100]      <1> 	mov	[readi.s_index], dl ; sector index in cluster (0 to spc -1)
 13423                              <1> 
 13424 00010A37 89C1                <1> 	mov	ecx, eax ; current cluster index
 13425 00010A39 A1[8C830100]        <1> 	mov	eax, [readi.fclust]
 13426 00010A3E 09C9                <1> 	or	ecx, ecx ; cluster index
 13427 00010A40 741B                <1> 	jz	short mget_r_6
 13428                              <1> 
 13429 00010A42 39CF                <1> 	cmp	edi, ecx
 13430 00010A44 7710                <1> 	ja	short mget_r_5 ; old cluster index is higher
 13431 00010A46 8B15[84830100]      <1> 	mov	edx, [readi.cluster]
 13432 00010A4C 21D2                <1> 	and	edx, edx
 13433 00010A4E 7406                <1> 	jz	short mget_r_5
 13434                              <1> 	; valid 'readi' parameters (*)
 13435 00010A50 89D0                <1> 	mov	eax, edx
 13436 00010A52 29F9                <1> 	sub	ecx, edi
 13437 00010A54 740C                <1> 	jz	short mget_r_7
 13438                              <1> mget_r_5:
 13439                              <1> 	; EAX = Beginning cluster
 13440                              <1> 	; EDX = Sector index in disk/file section
 13441                              <1> 	;	(Only for SINGLIX file system!)
 13442                              <1> 	; ECX = Cluster sequence number after the beginning cluster
 13443                              <1> 	; ESI = Logical DOS Drive Description Table address
 13444 00010A56 E82CC1FFFF          <1> 	call	get_cluster_by_index
 13445 00010A5B 724C                <1> 	jc	short mget_r_err
 13446                              <1> 	; EAX = Cluster number		
 13447                              <1> mget_r_6:
 13448 00010A5D A3[84830100]        <1> 	mov	[readi.cluster], eax ; FDT number for Singlix File System
 13449                              <1> mget_r_7:
 13450 00010A62 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
 13451 00010A66 765D                <1> 	jna	short mget_r_12
 13452                              <1> 
 13453                              <1> 	;sub	eax, 2
 13454                              <1> 	; 30/07/2022
 13455 00010A68 48                  <1> 	dec	eax
 13456 00010A69 48                  <1> 	dec	eax
 13457 00010A6A 0FB615[7A830100]    <1> 	movzx	edx, byte [readi.spc]
 13458 00010A71 F7E2                <1> 	mul	edx
 13459                              <1> 
 13460 00010A73 034668              <1> 	add	eax, [esi+LD_DATABegin]
 13461 00010A76 8A15[7B830100]      <1> 	mov	dl, [readi.s_index]
 13462 00010A7C 01D0                <1> 	add	eax, edx
 13463                              <1> mget_r_8:
 13464                              <1> 	; eax = logical sector number
 13465 00010A7E 803D[78830100]00    <1> 	cmp	byte [readi.valid], 0
 13466 00010A85 7608                <1> 	jna	short mget_r_9
 13467 00010A87 3B05[7C830100]      <1> 	cmp	eax, [readi.sector]
 13468 00010A8D 7435                <1> 	je	short mget_r_11 ; sector is already in 'readi' buffer
 13469                              <1> mget_r_9:
 13470 00010A8F A3[7C830100]        <1> 	mov	[readi.sector], eax
 13471 00010A94 BB[40030300]        <1> 	mov	ebx, readi_buffer ; buffer address
 13472                              <1> 	;mov	ecx, 1
 13473                              <1> 	; 30/07/2022
 13474 00010A99 31C9                <1> 	xor	ecx, ecx
 13475 00010A9B FEC1                <1> 	inc	cl
 13476                              <1> 	; ecx = 1	
 13477                              <1> 
 13478                              <1> 	; 29/04/2016
 13479                              <1> 	;xor	dl, dl
 13480                              <1> 
 13481                              <1> 	; EAX = Logical sector number
 13482                              <1> 	; ECX = Sector count
 13483                              <1> 	; EBX = Buffer address
 13484                              <1> 	; (EDX = 0)
 13485                              <1> 	; ESI = Logical DOS drive description table address	
 13486                              <1> 
 13487 00010A9D E803130000          <1> 	call	disk_read
 13488 00010AA2 7314                <1> 	jnc	short mget_r_10
 13489                              <1> 
 13490                              <1> 	; 22/10/2016 (15h -> 17)
 13491 00010AA4 B811000000          <1> 	mov	eax, 17 ; Drive not ready or read error !
 13492                              <1> mget_r_err:
 13493 00010AA9 A3[84010300]        <1> 	mov	[u.error], eax
 13494                              <1> 	; 12/10/2016
 13495 00010AAE A3[1C010300]        <1> 	mov	[u.r0], eax
 13496 00010AB3 E997C2FFFF          <1> 	jmp	error
 13497                              <1> mget_r_10:
 13498 00010AB8 C605[78830100]01    <1> 	mov	byte [readi.valid], 1 ; 24/10/2016
 13499 00010ABF A1[7C830100]        <1> 	mov	eax, [readi.sector]
 13500                              <1> mget_r_11:
 13501 00010AC4 C3                  <1> 	retn
 13502                              <1> mget_r_12:
 13503                              <1> 	; EAX = FDT number
 13504                              <1> 	; EDX = Sector index from FDT sector (0,1,2,3,4...)
 13505 00010AC5 40                  <1> 	inc	eax ; the first data sector in FS disk section	
 13506 00010AC6 8915[90830100]      <1> 	mov	[readi.fs_index], edx
 13507 00010ACC 01D0                <1> 	add	eax, edx
 13508 00010ACE EBAE                <1> 	jmp	short mget_r_8
 13509                              <1> 
 13510                              <1> trans_addr_r:
 13511                              <1> 	; 12/10/2016
 13512                              <1> 	; 02/05/2016 - TRDOS 386 (TRDOS v2.0)
 13513                              <1> 	; Translate virtual address to physical address 
 13514                              <1> 	; for reading from user's memory space
 13515                              <1> 	; 04/06/2015 - 18/10/2015 (Retro UNIX 386 v1)
 13516                              <1> 
 13517 00010AD0 31D2                <1> 	xor	edx, edx ; 0 (read access sign)
 13518 00010AD2 EB04                <1> 	jmp 	short trans_addr_rw
 13519                              <1> 
 13520                              <1> trans_addr_w:
 13521                              <1> 	; 12/10/2016
 13522                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
 13523                              <1> 	; Translate virtual address to physical address 
 13524                              <1> 	; for writing to user's memory space
 13525                              <1> 	; 04/06/2015 - 18/10/2015 (Retro UNIX 386 v1)
 13526                              <1> 	
 13527 00010AD4 29D2                <1> 	sub	edx, edx
 13528 00010AD6 FEC2                <1> 	inc	dl ; 1 (write access sign)
 13529                              <1> trans_addr_rw:
 13530 00010AD8 50                  <1> 	push	eax
 13531 00010AD9 53                  <1> 	push	ebx
 13532 00010ADA 52                  <1> 	push 	edx ; r/w sign (in DL)
 13533                              <1> 	;
 13534 00010ADB 8B1D[40010300]      <1> 	mov	ebx, [u.base]
 13535 00010AE1 E8EB4FFFFF          <1> 	call	get_physical_addr ; get physical address
 13536 00010AE6 730F                <1> 	jnc	short passc_0
 13537 00010AE8 A3[84010300]        <1> 	mov	[u.error], eax
 13538 00010AED A3[1C010300]        <1> 	mov	[u.r0], eax ; 12/10/2016
 13539                              <1> 	;pop	edx
 13540                              <1> 	;pop 	ebx
 13541                              <1> 	;pop	eax
 13542 00010AF2 E958C2FFFF          <1> 	jmp	error
 13543                              <1> passc_0:
 13544 00010AF7 F6C202              <1> 	test	dl, PTE_A_WRITE ; writable page
 13545 00010AFA 5A                  <1> 	pop	edx
 13546 00010AFB 751C                <1> 	jnz	short passc_1
 13547                              <1> 	
 13548 00010AFD 20D2                <1> 	and 	dl, dl
 13549 00010AFF 7418                <1> 	jz	short passc_1
 13550                              <1> 	; read only (duplicated) page -must be copied to a new page-
 13551                              <1> 	; EBX = linear address
 13552 00010B01 51                  <1> 	push 	ecx
 13553 00010B02 E83B4FFFFF          <1> 	call 	copy_page
 13554 00010B07 59                  <1> 	pop	ecx
 13555 00010B08 721E                <1> 	jc	short passc_2
 13556 00010B0A 50                  <1> 	push	eax ; physical address of the new/allocated page
 13557 00010B0B E8C14FFFFF          <1> 	call	add_to_swap_queue	
 13558 00010B10 58                  <1> 	pop	eax
 13559 00010B11 81E3FF0F0000        <1> 	and 	ebx, PAGE_OFF ; 0FFFh
 13560                              <1> 	;mov 	ecx, PAGE_SIZE
 13561                              <1> 	;sub	ecx, ebx 
 13562 00010B17 01D8                <1> 	add	eax, ebx  
 13563                              <1> passc_1: 
 13564 00010B19 A3[7C010300]        <1> 	mov 	[u.pbase], eax ; physical address	
 13565 00010B1E 66890D[80010300]    <1> 	mov	[u.pcount], cx ; remain byte count in page (1-4096)
 13566 00010B25 5B                  <1> 	pop	ebx
 13567 00010B26 58                  <1> 	pop	eax
 13568 00010B27 C3                  <1> 	retn
 13569                              <1> passc_2:
 13570 00010B28 B804000000          <1> 	mov	eax, ERR_MINOR_IM ; "Insufficient memory !" error
 13571 00010B2D A3[1C010300]        <1> 	mov	[u.r0], eax ; 12/10/2016
 13572 00010B32 A3[84010300]        <1> 	mov	[u.error], eax
 13573                              <1> 	;pop 	ebx
 13574                              <1> 	;pop	eax
 13575 00010B37 E913C2FFFF          <1> 	jmp	error
 13576                              <1> 
 13577                              <1> sioreg: 
 13578                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
 13579                              <1> 	; 19/05/2015 - 25/07/2015 (Retro UNIX 386 v1)
 13580                              <1> 	; 12/03/2013 - 22/07/2013 (Retro UNIX 8086 v1)
 13581                              <1> 	; INPUTS -> 
 13582                              <1> 	;     EBX = system buffer (data) address (r5)
 13583                              <1> 	;     [u.fofp] = pointer to file offset pointer
 13584                              <1> 	;     [u.base] = virtual address of the user buffer
 13585                              <1> 	;     [u.pbase] = physical address of the user buffer
 13586                              <1> 	;     [u.count] = byte count
 13587                              <1> 	;     [u.pcount] = byte count within page frame
 13588                              <1> 	; OUTPUTS -> 
 13589                              <1> 	;     ESI = user data offset (r1)
 13590                              <1> 	;     EDI = system (I/O) buffer offset (r2)
 13591                              <1> 	;     ECX = byte count (r3)
 13592                              <1> 	;     EAX = remain bytes after byte count within page frame
 13593                              <1> 	;	(If EAX > 0, transfer will continue from the next page)
 13594                              <1>         ;
 13595                              <1> 	; ((Modified registers:  EDX))
 13596                              <1>  
 13597 00010B3C 8B35[30010300]      <1>         mov     esi, [u.fofp]
 13598 00010B42 8B3E                <1>         mov     edi, [esi]
 13599 00010B44 89F9                <1> 	mov	ecx, edi
 13600 00010B46 81C900FEFFFF        <1> 	or	ecx, 0FFFFFE00h
 13601 00010B4C 81E7FF010000        <1> 	and	edi, 1FFh
 13602 00010B52 01DF                <1> 	add	edi, ebx ; EBX = system buffer (data) address
 13603 00010B54 F7D9                <1> 	neg	ecx
 13604 00010B56 3B0D[44010300]      <1> 	cmp	ecx, [u.count]
 13605 00010B5C 7606                <1> 	jna	short sioreg_0
 13606 00010B5E 8B0D[44010300]      <1> 	mov	ecx, [u.count]
 13607                              <1> sioreg_0:
 13608 00010B64 803D[82010300]00    <1> 	cmp	byte [u.kcall], 0 
 13609 00010B6B 7613                <1> 	jna	short sioreg_1
 13610                              <1> 	 ; the caller is 'mkdir' or 'namei'
 13611 00010B6D A1[40010300]        <1> 	mov	eax, [u.base]
 13612 00010B72 A3[7C010300]        <1> 	mov 	[u.pbase], eax ; physical address = virtual address
 13613 00010B77 66890D[80010300]    <1> 	mov	word [u.pcount], cx ; remain bytes in buffer (1 sector)
 13614 00010B7E EB0B                <1> 	jmp	short sioreg_2
 13615                              <1> sioreg_1:
 13616 00010B80 0FB715[80010300]    <1> 	movzx	edx, word [u.pcount]
 13617 00010B87 39D1                <1> 	cmp	ecx, edx	
 13618 00010B89 772A                <1> 	ja	short sioreg_4 ; transfer count > [u.pcount]
 13619                              <1> sioreg_2: ; 2:
 13620 00010B8B 31C0                <1> 	xor 	eax, eax
 13621                              <1> sioreg_3:
 13622 00010B8D 010D[48010300]      <1> 	add 	[u.nread], ecx
 13623 00010B93 290D[44010300]      <1> 	sub 	[u.count], ecx
 13624 00010B99 010D[40010300]      <1> 	add 	[u.base], ecx
 13625 00010B9F 010E                <1>         add 	[esi], ecx 
 13626 00010BA1 8B35[7C010300]      <1> 	mov	esi, [u.pbase]
 13627 00010BA7 66290D[80010300]    <1> 	sub	[u.pcount], cx
 13628 00010BAE 010D[7C010300]      <1> 	add	[u.pbase], ecx
 13629 00010BB4 C3                  <1>         retn
 13630                              <1> sioreg_4:
 13631                              <1> 	; transfer count > [u.pcount] 
 13632                              <1> 	; (ecx > edx)
 13633 00010BB5 89C8                <1> 	mov	eax, ecx
 13634 00010BB7 29D0                <1> 	sub	eax, edx ; remain bytes for 1 sector (block) transfer 
 13635 00010BB9 89D1                <1> 	mov	ecx, edx ; current transfer count = [u.pcount]
 13636 00010BBB EBD0                <1> 	jmp	short sioreg_3
 13637                              <1> 
 13638                              <1> tswitch: ; Retro UNIX 386 v1
 13639                              <1> tswap:
 13640                              <1> 	; 16/01/2017
 13641                              <1> 	; 21/05/2016 - TRDOS 386 (TRDOS v2.0)
 13642                              <1> 	; 10/05/2015 - 01/09/2015 (Retro UNIX 386 v1)
 13643                              <1> 	; 14/04/2013 - 14/02/2014 (Retro UNIX 8086 v1)
 13644                              <1> 	; time out swap, called when a user times out.
 13645                              <1> 	; the user is put on the low priority queue.
 13646                              <1> 	; This is done by making a link from the last user
 13647                              <1> 	; on the low priority queue to him via a call to 'putlu'.
 13648                              <1> 	; then he is swapped out.
 13649                              <1> 
 13650                              <1> 	; TRDOS 386 (TRDOS v2.0) modification ->  ** 21/05/2016 **
 13651                              <1> 	;     * when a high priority (event) process will be stopped
 13652                              <1> 	;	(swapped out, swithched out/off), 'tswap/tswitch' will
 13653                              <1> 	;	not add it to a run queue. 
 13654                              <1> 	;	/// What for: Process may be already in a run queue, 
 13655                              <1> 	;	it is unspeficied state because process might be started
 13656                              <1> 	;	by a timer event which does not regard previous priority
 13657                              <1> 	;	level and run queue of the process (for fast executing!).
 13658                              <1> 	;	After the 'run for event', process will be sequenced
 13659                              <1> 	;	to run by it's actual run queue. ///
 13660                              <1> 	;
 13661                              <1> 	; Retro UNIX 386 v1 modification ->
 13662                              <1> 	;       swap (software task switch) is performed by changing
 13663                              <1> 	;	user's page directory (u.pgdir) instead of segment change
 13664                              <1> 	;	as in Retro UNIX 8086 v1.
 13665                              <1> 	;
 13666                              <1> 	; RETRO UNIX 8086 v1 modification ->
 13667                              <1> 	;       'swap to disk' is replaced with 'change running segment'
 13668                              <1> 	;	according to 8086 cpu (x86 real mode) architecture.
 13669                              <1> 	;	pdp-11 was using 64KB uniform memory while IBM PC
 13670                              <1> 	;	compatibles was using 1MB segmented memory
 13671                              <1> 	;	in 8086/8088 times.
 13672                              <1> 	;
 13673                              <1> 	; INPUTS ->
 13674                              <1> 	;    u.uno - users process number
 13675                              <1> 	;    runq+4 - lowest priority queue
 13676                              <1> 	; OUTPUTS ->
 13677                              <1> 	;    r0 - users process number
 13678                              <1> 	;    r2 - lowest priority queue address
 13679                              <1> 	;
 13680                              <1> 	; ((AX = R0, BX = R2)) output
 13681                              <1> 	; ((Modified registers: EDX, EBX, ECX, ESI, EDI))
 13682                              <1> 	;
 13683                              <1> 
 13684                              <1> 	NOTE:
 13685                              <1> 	;* [u.pri] priority level is specified by run queue which is process 
 13686                              <1> 	;  comes to run from.
 13687                              <1> 	;* Initial [u.pri] is 1 ('normal/regular') for programs 
 13688                              <1> 	;  (which are launched by MainProg or 'sysexec'), it is changed
 13689                              <1> 	;  to 2 ('high') by timer event, if program uses 'systimer' system call.
 13690                              <1> 	;* Program (Process) also can change it's running priority 
 13691                              <1> 	;  from 1 to 0 or up to 2 by using 'syspri' system call; but,
 13692                              <1> 	;  if program selects priority level 2 (high) for running, next time 
 13693                              <1> 	;  it is reduced to 1 (normal/regular) because 'syspri' adds this
 13694                              <1> 	;  program to 'run for normal' queue while running duration is a bit
 13695                              <1> 	;  protected from swap/switch out immediate, behalf of other high 
 13696                              <1> 	;  priority process in sequence. Program (with high priority) will not 
 13697                              <1> 	;  be swapped/switched out (by timer event) before it's time quantum 
 13698                              <1> 	;  will be elapsed, but, this will be temporary if program is not using 
 13699                              <1> 	;  timer event function.
 13700                              <1> 
 13701                              <1> 	;For example:
 13702                              <1> 	;If a process frequently gets a timer event, it runs at high priority
 13703                              <1> 	;level but when it returns from running it returns to actual run queue,
 13704                              <1> 	;not to 'run for event' queue again.
 13705                              <1> 	;'tswap' will not change the sequence at return/stop(swap out) stage.
 13706                              <1> 	;But if priority level not high (=2, 'run for event'), 'tswap/tswitch'
 13707                              <1> 	;will add the stopping process to relevant run queue according to
 13708                              <1> 	;[u.pri] priority level.
 13709                              <1> 
 13710                              <1> 	; 16/01/2017
 13711 00010BBD BB[0C010300]        <1> 	mov	ebx, runq+2 	; 'runq_normal' ; normal/regular priority
 13712                              <1> 	; 21/05/2016
 13713                              <1> 	;cmp	byte [u.pri], 2	; high priority (run for event) ?
 13714                              <1> 	;jnb	short swap
 13715                              <1> 	; 16/01/2017
 13716                              <1> 	; (Normal and also high/event priority processes will be added to
 13717                              <1> 	; normal priority run queue for ensuring circular running sequence!)
 13718                              <1> 	; (Timer interrupt or 'syspri' system call may change priority and run
 13719                              <1> 	; queue to high/event level.)
 13720 00010BC2 803D[66010300]00    <1> 	cmp	byte [u.pri], 0
 13721 00010BC9 7702                <1> 	ja	short tswap_1	; normal priority run queue
 13722                              <1> 	;
 13723 00010BCB 43                  <1> 	inc	ebx
 13724 00010BCC 43                  <1> 	inc	ebx		; runq+4, 'runq_background', low priority
 13725                              <1> tswap_1:
 13726 00010BCD A0[6D010300]        <1> 	mov 	al, [u.uno]
 13727                              <1> 	       	; movb u.uno,r1 / move users process number to r1
 13728                              <1> 		; mov  $runq+4,r2 
 13729                              <1> 			; / move lowest priority queue address to r2
 13730                              <1>       	; ebx = run queue
 13731 00010BD2 E8FE000000          <1> 	call 	putlu
 13732                              <1> 		; jsr r0,putlu / create link from last user on Q to 
 13733                              <1> 		             ; / u.uno's user
 13734                              <1> 
 13735                              <1> switch: ; Retro UNIX 386 v1
 13736                              <1> swap:
 13737                              <1> 	; 02/01/2017
 13738                              <1> 	; 21/05/2016
 13739                              <1> 	; 20/05/2016
 13740                              <1> 	; 02/05/2016
 13741                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
 13742                              <1> 	; 10/05/2015 - 02/09/2015 (Retro UNIX 386 v1)
 13743                              <1> 	; 14/04/2013 - 08/03/2014 (Retro UNIX 8086 v1)
 13744                              <1> 	;
 13745                              <1> 	; 'swap' is routine that controls the swapping of processes
 13746                              <1> 	; in and out of core.
 13747                              <1> 	;
 13748                              <1> 	; TRDOS 386 (TRDOS v2.0) modification ->  ** 20/05/2016 **
 13749                              <1> 	;     * 3 different priority level is applied 
 13750                              <1> 	;	(just as original unix v1)
 13751                              <1> 	;	1) high priority (event) run queue, 'runq_event'
 13752                              <1> 	;	2) normal priority (regular) run queue, 'runq_normal'
 13753                              <1> 	;	3) low priority (background) run queue, 'runq_backgroud'
 13754                              <1> 	;	'swap' code will run a process which has max. priority
 13755                              <1>         ;       (for earliest event at first)
 13756                              <1> 	;
 13757                              <1> 	; Retro UNIX 386 v1 modification ->
 13758                              <1> 	;       swap (software task switch) is performed by changing
 13759                              <1> 	;	user's page directory (u.pgdir) instead of segment change
 13760                              <1> 	;	as in Retro UNIX 8086 v1.
 13761                              <1> 	;
 13762                              <1> 	; RETRO UNIX 8086 v1 modification ->
 13763                              <1> 	;       'swap to disk' is replaced with 'change running segment'
 13764                              <1> 	;	according to 8086 cpu (x86 real mode) architecture.
 13765                              <1> 	;	pdp-11 was using 64KB uniform memory while IBM PC
 13766                              <1> 	;	compatibles was using 1MB segmented memory
 13767                              <1> 	;	in 8086/8088 times.
 13768                              <1> 	;
 13769                              <1> 	; INPUTS ->
 13770                              <1> 	;    runq table - contains processes to run.
 13771                              <1> 	;    p.link - contains next process in line to be run.
 13772                              <1> 	;    u.uno - process number of process in core	
 13773                              <1> 	;    s.stack - swap stack used as an internal stack for swapping.
 13774                              <1> 	; OUTPUTS ->
 13775                              <1> 	;    (original unix v1 -> present process to its disk block)
 13776                              <1> 	;    (original unix v1 -> new process into core -> 
 13777                              <1> 	;	   Retro Unix 8086 v1 -> segment registers changed 
 13778                              <1> 	;	   for new process)
 13779                              <1> 	;    u.quant = 3 (Time quantum for a process)
 13780                              <1> 	; 	((INT 1Ch count down speed -> 18.2 times per second)
 13781                              <1> 	;    RETRO UNIX 8086 v1 will use INT 1Ch (18.2 times per second)
 13782                              <1> 	;	 for now, it will swap the process if there is not
 13783                              <1> 	;	 a keyboard event (keystroke) (Int 15h, function 4Fh)
 13784                              <1> 	;	 or will count down from 3 to 0 even if there is a
 13785                              <1> 	;        keyboard event locking due to repetitive key strokes.
 13786                              <1> 	;	 u.quant will be reset to 3 for RETRO UNIX 8086 v1.
 13787                              <1> 	;
 13788                              <1> 	; ((Modified registers: EAX, EDX, EBX, ECX, ESI, EDI))
 13789                              <1> 
 13790                              <1> 	;NOTE:
 13791                              <1> 	;High priority queue is the first for selecting a process to run.
 13792                              <1> 	;If there is not a process in high priority level run queue,
 13793                              <1> 	;a process in normal priority run queue will be selected
 13794                              <1> 	;or a proces in low priority run queue will be selected if normal
 13795                              <1> 	;priority level run queue is empty.
 13796                              <1> 	
 13797                              <1> 	; 21/05/2016 -(3 priority levels, 3 run queues)
 13798 00010BD7 BE[0A010300]        <1> 	mov	esi, runq ; 'runq_event' ; high priority, 'run for event'
 13799 00010BDC C605[D4830100]03    <1> 	mov	byte [priority], 3 ; high priority + 1
 13800 00010BE3 31DB                <1> 	xor	ebx, ebx ; 02/01/2017
 13801                              <1> swap_0: ; 1: / search runq table for highest priority process
 13802 00010BE5 66AD                <1> 	lodsw  ; mov ax, [esi], add esi+2
 13803                              <1> 	;xor	ebx, ebx ; 02/05/2016
 13804 00010BE7 6621C0              <1> 	and 	ax, ax ; are there any processes to run in this Q entry
 13805 00010BEA 750E                <1> 	jnz	short swap_2 
 13806                              <1> 	; 21/05/2026
 13807                              <1> 	; runq_normal = runq+2, runq_background = runq+4
 13808 00010BEC FE0D[D4830100]      <1> 	dec	byte [priority] ; 3 -> 3, 2 -> 1, 1-> 0
 13809 00010BF2 75F1                <1> 	jnz	short swap_0	
 13810                              <1> 	;cmp	esi, runq+6  ; if zero compare address to end of table
 13811                              <1> 	;jb	short swap_0 ; if not at end, go back
 13812                              <1> swap_1:
 13813                              <1> 	; 02/05/2016
 13814                              <1> 	; 29/04/2016 (TRDOS 386 = TRDOS v2.0)
 13815                              <1> 	; No user process to run...
 13816                              <1> 	; Run the kernel process... MainProg: Internal Command Interpreter
 13817 00010BF4 FEC0                <1> 	inc	al ; mov al, 1  ; process number of MainProg
 13818 00010BF6 FEC3                <1> 	inc	bl ; mov bl, al ; 1
 13819 00010BF8 EB1E                <1> 	jmp	short swap_4
 13820                              <1> swap_2:
 13821                              <1> 	; 21/05/2016
 13822 00010BFA FE0D[D4830100]      <1> 	dec	byte [priority] ; priority level of present user/process
 13823                              <1> 			        ; 0, 1, 2
 13824 00010C00 4E                  <1> 	dec	esi
 13825 00010C01 4E                  <1>         dec     esi
 13826                              <1> 	;
 13827 00010C02 88C3                <1> 	mov	bl, al
 13828 00010C04 38E0                <1> 	cmp	al, ah ; is there only 1 process in the queue to be run
 13829 00010C06 740A                <1> 	je	short swap_3 ; yes
 13830 00010C08 8AA3[4F000300]      <1> 	mov	ah, [ebx+p.link-1] 
 13831 00010C0E 8826                <1>        	mov	[esi], ah ; move next process in line into run queue
 13832 00010C10 EB06                <1> 	jmp	short swap_4
 13833                              <1> swap_3: 
 13834 00010C12 6631D2              <1> 	xor	dx, dx
 13835 00010C15 668916              <1> 	mov	[esi], dx ; zero the entry; no processes on the Q
 13836                              <1> swap_4: 
 13837 00010C18 8A25[6D010300]      <1> 	mov 	ah, [u.uno]
 13838 00010C1E 38C4                <1> 	cmp	ah, al ; is this process the same as the process in core?
 13839 00010C20 743B                <1>        	je	short swap_8 ; yes, don't have to swap
 13840 00010C22 08E4                <1> 	or	ah, ah  ; is the process # = 0
 13841 00010C24 740D                <1>        	jz	short swap_6 ; 'sysexit'
 13842                              <1> 	;cmp	ah, al ;is this process the same as the process in core?
 13843                              <1>        	;je	short swap_8 ; yes, don't have to swap
 13844 00010C26 8925[18010300]      <1> 	mov	[u.usp], esp ; return  address for 'syswait' & 'sleep'
 13845 00010C2C E834000000          <1> 	call	wswap   ; write out core to disk
 13846 00010C31 EB1C                <1> 	jmp 	short swap_7
 13847                              <1> swap_6:
 13848                              <1> 	; Deallocate memory pages belong to the process
 13849                              <1> 	; which is being terminated.
 13850                              <1> 	; (Retro UNIX 386 v1 modification !)
 13851                              <1> 	;
 13852 00010C33 53                  <1> 	push	ebx
 13853 00010C34 A1[74010300]        <1> 	mov 	eax, [u.pgdir]  ; page directory of the process
 13854 00010C39 8B1D[78010300]      <1> 	mov	ebx, [u.ppgdir] ; page directory of the parent process
 13855 00010C3F E8DF4BFFFF          <1> 	call	deallocate_page_dir
 13856 00010C44 A1[70010300]        <1> 	mov	eax, [u.upage] ; 'user' structure page of the process
 13857 00010C49 E8644CFFFF          <1> 	call	deallocate_page
 13858 00010C4E 5B                  <1> 	pop	ebx
 13859                              <1> swap_7: 
 13860 00010C4F C0E302              <1> 	shl	bl, 2 ; * 4 
 13861 00010C52 8B83[6C000300]      <1> 	mov	eax, [ebx+p.upage-4] ; the 'u' page of the new process
 13862 00010C58 E840000000          <1> 	call	rswap ; read new process into core
 13863                              <1> swap_8: 
 13864                              <1> 	; Retro UNIX  8086 v1 modification !
 13865 00010C5D C605[64010300]04    <1> 	mov	byte [u.quant], time_count 
 13866 00010C64 C3                  <1> 	retn
 13867                              <1> 
 13868                              <1> wswap:  ; < swap out, swap to disk >
 13869                              <1> 	; 28/02/2017 (fnsave)
 13870                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
 13871                              <1> 	; 09/05/2015 (Retro UNIX 386 v1)
 13872                              <1> 	; 26/05/2013 - 08/03/2014 (Retro UNIX 8086 v1)
 13873                              <1> 	; 'wswap' writes out the process that is in core onto its
 13874                              <1> 	; appropriate disk area.
 13875                              <1> 	;
 13876                              <1> 	; Retro UNIX 386 v1 modification ->
 13877                              <1> 	;       User (u) structure content and the user's register content
 13878                              <1> 	;	will be copied to the process's/user's UPAGE (a page for
 13879                              <1> 	;	saving 'u' structure and user registers for task switching).
 13880                              <1> 	;	u.usp - points to kernel stack address which contains
 13881                              <1> 	;		user's registers while entering system call.
 13882                              <1> 	;	u.sp  - points to kernel stack address 
 13883                              <1> 	;		to return from system call -for IRET-.
 13884                              <1> 	;	[u.usp]+32+16 = [u.sp] 
 13885                              <1> 	;	[u.usp] -> edi, esi, ebp, esp (= [u.usp]+32), ebx, 
 13886                              <1> 	;		edx, ecx, eax, gs, fs, es, ds, -> [u.sp].
 13887                              <1> 	;
 13888                              <1> 	; Retro UNIX 8086 v1 modification ->
 13889                              <1> 	;       'swap to disk' is replaced with 'change running segment'
 13890                              <1> 	;	according to 8086 cpu (x86 real mode) architecture.
 13891                              <1> 	;	pdp-11 was using 64KB uniform memory while IBM PC
 13892                              <1> 	;	compatibles was using 1MB segmented memory 
 13893                              <1> 	;	in 8086/8088 times.
 13894                              <1> 	;
 13895                              <1> 	; INPUTS ->
 13896                              <1> 	;    u.break - points to end of program
 13897                              <1> 	;    u.usp - stack pointer at the moment of swap
 13898                              <1> 	;    core - beginning of process program
 13899                              <1> 	;    ecore - end of core 	
 13900                              <1> 	;    user - start of user parameter area
 13901                              <1> 	;    u.uno - user process number
 13902                              <1> 	;    p.dska - holds block number of process
 13903                              <1> 	; OUTPUTS ->
 13904                              <1> 	;    swp I/O queue
 13905                              <1> 	;    p.break - negative word count of process 
 13906                              <1> 	;    r1 - process disk address	
 13907                              <1> 	;    r2 - negative word count
 13908                              <1> 	;
 13909                              <1> 	; RETRO UNIX 8086 v1 input/output:
 13910                              <1> 	;
 13911                              <1> 	; INPUTS ->
 13912                              <1> 	;    u.uno - process number (to be swapped out)
 13913                              <1> 	; OUTPUTS ->
 13914                              <1> 	;    none
 13915                              <1> 	;
 13916                              <1> 	;   ((Modified registers: ECX, ESI, EDI))  
 13917                              <1> 	;
 13918                              <1> 
 13919                              <1> 	; 28/02/2017
 13920                              <1> 	;cmp	byte [multi_tasking], 0  ; Musti tasking mode ?
 13921                              <1> 	;jna	short wswp
 13922 00010C65 803D[97010300]00    <1> 	cmp	byte [u.fpsave], 0 ; 28/02/2017
 13923 00010C6C 7606                <1> 	jna	short wswp
 13924 00010C6E DD35[98010300]      <1> 	fnsave	[u.fpregs] ; save floating point registers (94 bytes)
 13925                              <1> wswp:
 13926 00010C74 8B3D[70010300]      <1> 	mov	edi, [u.upage] ; process's user (u) structure page addr
 13927 00010C7A B93C000000          <1> 	mov	ecx, (U_SIZE + 3) / 4
 13928 00010C7F BE[14010300]        <1> 	mov	esi, user ; active user (u) structure
 13929 00010C84 F3A5                <1> 	rep	movsd
 13930                              <1> 	;
 13931 00010C86 8B35[18010300]      <1> 	mov	esi, [u.usp] ; esp (system stack pointer, 
 13932                              <1> 			     ;      points to user registers)
 13933 00010C8C 8B0D[14010300]      <1> 	mov	ecx, [u.sp]  ; return address from the system call
 13934                              <1> 			     ; (for IRET)
 13935                              <1> 			     ; [u.sp] -> EIP (user)
 13936                              <1> 			     ; [u.sp+4]-> CS (user)
 13937                              <1> 			     ; [u.sp+8] -> EFLAGS (user)
 13938                              <1> 			     ; [u.sp+12] -> ESP (user)
 13939                              <1> 			     ; [u.sp+16] -> SS (user)
 13940 00010C92 29F1                <1> 	sub	ecx, esi     ; required space for user registers
 13941 00010C94 83C114              <1> 	add	ecx, 20	     ; +5 dwords to return from system call
 13942                              <1> 			     ; (for IRET)
 13943 00010C97 C1E902              <1> 	shr	ecx, 2
 13944 00010C9A F3A5                <1> 	rep	movsd
 13945 00010C9C C3                  <1> 	retn
 13946                              <1> 
 13947                              <1> rswap:  ; < swap in, swap from disk >
 13948                              <1> 	; 28/02/2017 (frstor)
 13949                              <1> 	; 15/01/2017
 13950                              <1> 	; 14/01/2017
 13951                              <1> 	; 21/05/2016
 13952                              <1> 	; 03/05/2016
 13953                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
 13954                              <1> 	; 09/05/2015 - 15/09/2015 (Retro UNIX 386 v1)
 13955                              <1> 	; 26/05/2013 - 08/03/2014 (Retro UNIX 8086 v1)
 13956                              <1> 	; 'rswap' reads a process whose number is in r1,
 13957                              <1> 	; from disk into core.
 13958                              <1> 	;
 13959                              <1> 	; Retro UNIX 386 v1 modification ->
 13960                              <1> 	;       User (u) structure content and the user's register content
 13961                              <1> 	;	will be restored from process's/user's UPAGE (a page for
 13962                              <1> 	;	saving 'u' structure and user registers for task switching).
 13963                              <1> 	;	u.usp - points to kernel stack address which contains
 13964                              <1> 	;		user's registers while entering system call.
 13965                              <1> 	;	u.sp  - points to kernel stack address 
 13966                              <1> 	;		to return from system call -for IRET-.
 13967                              <1> 	;	[u.usp]+32+16 = [u.sp] 
 13968                              <1> 	;	[u.usp] -> edi, esi, ebp, esp (= [u.usp]+32), ebx, 
 13969                              <1> 	;		edx, ecx, eax, gs, fs, es, ds, -> [u.sp].
 13970                              <1> 	;
 13971                              <1> 	; RETRO UNIX 8086 v1 modification ->
 13972                              <1> 	;       'swap to disk' is replaced with 'change running segment'
 13973                              <1> 	;	according to 8086 cpu (x86 real mode) architecture.
 13974                              <1> 	;	pdp-11 was using 64KB uniform memory while IBM PC
 13975                              <1> 	;	compatibles was using 1MB segmented memory 
 13976                              <1> 	;	in 8086/8088 times.
 13977                              <1> 	;
 13978                              <1> 	; INPUTS ->
 13979                              <1> 	;    r1 - process number of process to be read in
 13980                              <1> 	;    p.break - negative of word count of process 
 13981                              <1> 	;    p.dska - disk address of the process
 13982                              <1> 	;    u.emt - determines handling of emt's
 13983                              <1> 	;    u.ilgins - determines handling of illegal instructions
 13984                              <1> 	; OUTPUTS ->
 13985                              <1> 	;    8 = (u.ilgins)
 13986                              <1> 	;    24 = (u.emt)
 13987                              <1> 	;    swp - bit 10 is set to indicate read 
 13988                              <1> 	;		(bit 15=0 when reading is done)	
 13989                              <1> 	;    swp+2 - disk block address
 13990                              <1> 	;    swp+4 - negative word count 	
 13991                              <1> 	;      ((swp+6 - address of user structure)) 
 13992                              <1> 	;
 13993                              <1> 	; RETRO UNIX 8086 v1 input/output:
 13994                              <1> 	;
 13995                              <1> 	; INPUTS ->
 13996                              <1> 	;    AL	- new process number (to be swapped in)	 
 13997                              <1> 	; OUTPUTS ->
 13998                              <1> 	;    none
 13999                              <1> 	;
 14000                              <1> 	;   ((Modified registers: EAX, ECX, ESI, EDI, ESP))
 14001                              <1> 	;
 14002                              <1> 	; Retro UNIX 386 v1 - modification ! 14/05/2015
 14003 00010C9D 89C6                <1> 	mov	esi, eax  ; process's user (u) structure page addr
 14004 00010C9F B93C000000          <1> 	mov	ecx, (U_SIZE + 3) / 4
 14005 00010CA4 BF[14010300]        <1> 	mov	edi, user ; active user (u) structure	
 14006 00010CA9 F3A5                <1> 	rep	movsd
 14007 00010CAB 58                  <1> 	pop	eax	; 'rswap' return address
 14008                              <1> 	; 
 14009                              <1> 	;cli
 14010 00010CAC 8B3D[18010300]      <1> 	mov	edi, [u.usp] ; esp (system stack pointer,
 14011                              <1> 			     ;     points to user registers)
 14012 00010CB2 89FC                <1> 	mov	esp, edi     ; 14/01/2017
 14013 00010CB4 8B0D[14010300]      <1> 	mov	ecx, [u.sp]  ; return address from the system call
 14014                              <1> 			     ; (for IRET)
 14015                              <1> 			     ; [u.sp] -> EIP (user)
 14016                              <1> 			     ; [u.sp+4]-> CS (user)
 14017                              <1> 			     ; [u.sp+8] -> EFLAGS (user)
 14018                              <1> 			     ; [u.sp+12] -> ESP (user)
 14019                              <1> 			     ; [u.sp+16] -> SS (user)
 14020 00010CBA 29F9                <1> 	sub	ecx, edi     ; required space for user registers
 14021 00010CBC 83C114              <1> 	add	ecx, 20	     ; +5 dwords to return from system call
 14022                              <1> 			     ; (for IRET)
 14023 00010CBF C1E902              <1> 	shr	ecx, 2
 14024 00010CC2 F3A5                <1> 	rep	movsd
 14025                              <1> 	;mov	esp, [u.usp] ; 15/09/2015
 14026                              <1> 	;sti
 14027                              <1> 	; 28/02/2017
 14028                              <1> 	;cmp	byte [multi_tasking], 0  ; Musti tasking mode ?
 14029                              <1> 	;jna	short rswp_retn
 14030 00010CC4 803D[97010300]00    <1> 	cmp	byte [u.fpsave], 0
 14031 00010CCB 7606                <1> 	jna	short rswp_retn
 14032 00010CCD DD25[98010300]      <1> 	frstor	[u.fpregs] ; restore floating point regs (94 bytes)
 14033                              <1> rswp_retn:
 14034 00010CD3 50                  <1> 	push	eax	; 'rswap' return address
 14035 00010CD4 C3                  <1> 	retn
 14036                              <1> 
 14037                              <1> putlu: 
 14038                              <1> 	; 20/05/2016
 14039                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
 14040                              <1> 	; 10/05/2015 - 12/09/2015 (Retro UNIX 386 v1)
 14041                              <1> 	; 15/04/2013 - 23/02/2014 (Retro UNIX 8086 v1)
 14042                              <1> 	; 'putlu' is called with a process number in r1 and a pointer
 14043                              <1> 	; to lowest priority Q (runq+4) in r2. A link is created from
 14044                              <1> 	; the last process on the queue to process in r1 by putting
 14045                              <1> 	; the process number in r1 into the last process's link.
 14046                              <1> 	;
 14047                              <1> 	; INPUTS ->
 14048                              <1> 	;    r1 - user process number
 14049                              <1> 	;    r2 - points to lowest priority queue
 14050                              <1> 	;    p.dska - disk address of the process	
 14051                              <1> 	;    u.emt - determines handling of emt's
 14052                              <1> 	;    u.ilgins - determines handling of illegal instructions
 14053                              <1> 	; OUTPUTS ->
 14054                              <1> 	;    r3 - process number of last process on the queue upon
 14055                              <1> 	;	  entering putlu
 14056                              <1> 	;    p.link-1 + r3 - process number in r1
 14057                              <1> 	;    r2 - points to lowest priority queue
 14058                              <1> 	;
 14059                              <1> 	; ((Modified registers: EDX, EBX)) 
 14060                              <1> 	;
 14061                              <1> 	; / r1 = user process no.; r2 points to lowest priority queue
 14062                              <1> 
 14063                              <1> 	; EBX = r2
 14064                              <1> 	; EAX = r1 (AL=r1b)
 14065                              <1> 
 14066                              <1> 	; 20/05/2016
 14067                              <1> 	; AL = process number (1 to 16) // Retro UNIX 8086, 386 v1 //
 14068                              <1> 	;     (max. 16 processes available for current kernel version)
 14069                              <1> 	; EBX = run queue address ; 20/05/2016 (TRDOS 386)
 14070                              <1> 		; which is one of following addresses:
 14071                              <1> 		;  1) 'runq_event' high priority run queue
 14072                              <1> 		;  2) 'runq_normal' normal/regular priority run queue
 14073                              <1> 		;  3) 'runq_background' low priority run queue
 14074                              <1> 
 14075                              <1> 	;mov	ebx, runq
 14076 00010CD5 0FB613              <1> 	movzx  	edx, byte [ebx]
 14077 00010CD8 43                  <1> 	inc	ebx
 14078 00010CD9 20D2                <1> 	and	dl, dl
 14079                              <1> 		; tstb (r2)+ / is queue empty?
 14080 00010CDB 740A                <1>        	jz	short putlu_1
 14081                              <1> 		; beq 1f / yes, branch
 14082 00010CDD 8A13                <1> 	mov 	dl, [ebx] ; 12/09/2015
 14083                              <1> 		; movb (r2),r3 / no, save the "last user" process number
 14084                              <1> 			     ; / in r3
 14085 00010CDF 8882[4F000300]      <1>        	mov	[edx+p.link-1], al
 14086                              <1> 		; movb r1,p.link-1(r3) / put pointer to user on 
 14087                              <1> 			     ; / "last users" link
 14088 00010CE5 EB03                <1> 	jmp	short putlu_2
 14089                              <1> 		; br 2f /
 14090                              <1> putlu_1: ; 1:
 14091 00010CE7 8843FF              <1> 	mov	[ebx-1], al
 14092                              <1>        		; movb r1,-1(r2) / user is only user; 
 14093                              <1> 			    ; / put process no. at beginning and at end
 14094                              <1> putlu_2: ; 2: 
 14095 00010CEA 8803                <1> 	mov	[ebx], al
 14096                              <1>        		; movb r1,(r2) / user process in r1 is now the last entry
 14097                              <1> 			     ; / on the queue
 14098 00010CEC 88C2                <1> 	mov	dl, al
 14099 00010CEE 88B2[4F000300]      <1>         mov     [edx+p.link-1], dh ; 0
 14100                              <1> 		; dec r2 / restore r2
 14101 00010CF4 C3                  <1>         retn
 14102                              <1> 		; rts r0
 14103                              <1> 
 14104                              <1> sysver:
 14105                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
 14106 00010CF5 C705[1C010300]0002- <1> 	mov	dword [u.r0], 200h ; AH = major version, AL = minor version 
 14106 00010CFD 0000                <1>
 14107 00010CFF E96BC0FFFF          <1> 	jmp	sysret
 14108                              <1> 
 14109                              <1> syspri: ; change running priority (of the process)
 14110                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
 14111                              <1> 	; 21/05/2016
 14112                              <1> 	; 20/05/2026 - TRDOS 386 (TRDOS v2.0)
 14113                              <1> 	; INPUT ->
 14114                              <1> 	;	BL = priority level
 14115                              <1> 	;	   0 = low running priority (running on background)
 14116                              <1> 	;	   1 = normal/regular priority (running as regular)
 14117                              <1> 	;	   2 = high/event priority (running for event)
 14118                              <1> 	;	   >2 = invalid, it will accepted as 2 (event)
 14119                              <1> 	;	   0FFh = get/return current running priority only
 14120                              <1> 	; OUTPUT -> 	
 14121                              <1> 	;	* if current [u.pri] < 2
 14122                              <1> 	;	  if BL input < 0FFh ->
 14123                              <1> 	;	     [u.pri] is updated as in BL input (0,1,2)
 14124                              <1> 	;	  if BL input = 0FFh -> AL = [u.pri] (current)
 14125                              <1> 	;	      
 14126                              <1> 	;	* if current [u.pri] = 2
 14127                              <1> 	;	  if BL input < 0FFh -> cf = 1 & AL = 2
 14128                              <1> 	;	  if BL input = 0FFh -> cf = 0 & AL = 2
 14129                              <1> 	;	
 14130                              <1> 	;	NOTE: 	
 14131                              <1> 	;	If [u.pri] = 2, it can not be changed to 1 or 0;
 14132                              <1> 	;	because, run queue of the running process is unspecified
 14133                              <1> 	;	at this	stage. Process might be started by a timer event
 14134                              <1> 	;	or priority might be changed to high by previous
 14135                              <1> 	;	'syspri' system	call. In both cases, the process is in
 14136                              <1> 	;	'runq_normal' or 'runq_background' queue.
 14137                              <1> 	;	As result of this fact, when the [u.quant] time quantum
 14138                              <1> 	;	of the process is elapsed or 'sysrele' system call is
 14139                              <1> 	;	instructed by the process, 'tswap' ('tswitch') procedure
 14140                              <1> 	;	will be called (to 'swap' or 'switch' out the procedure)
 14141                              <1> 	;	and it will not call 'putlu' to add the (stopping)
 14142                              <1> 	;	process to relevant run queue when [u.pri] = 2.
 14143                              <1> 	;	(Otherwise, it would be possible to add process to
 14144                              <1> 	;	a run queue while it is already in a run queue, wrongly.)
 14145                              <1>   	;
 14146                              <1> 	;	If [u.pri]< 2, 'tswap/tswitch' procedure will call
 14147                              <1> 	;	'putlu' to add process to relevant run queue
 14148                              <1> 	;	according to [u.pri] value. ('runq_normal' for 1,
 14149                              <1> 	;	'runq_background' for 0).
 14150                              <1> 	;
 14151                              <1> 	;	If BL input >= 2 and < 0FFh while [u.pri] < 2,
 14152                              <1> 	;	process will be added to 'runq_normal' queue and
 14153                              <1> 	;	[u.pri] will be set to 2. (in 'syspri' system call)
 14154                              <1> 	;
 14155                              <1> 
 14156 00010D04 29C0                <1> 	sub	eax, eax ; 0
 14157 00010D06 A3[84010300]        <1> 	mov	[u.error], eax
 14158                              <1> 
 14159 00010D0B A0[66010300]        <1> 	mov	al, [u.pri]
 14160 00010D10 A3[1C010300]        <1> 	mov	[u.r0], eax
 14161                              <1> 
 14162 00010D15 FEC3                <1> 	inc	bl
 14163                              <1> 	;jz	sysret ; 0FFh -> 0, get priority level
 14164                              <1> 	; 23/07/2022	
 14165 00010D17 742C                <1> 	jz	short syspri_2	; jmp sysret
 14166                              <1> 
 14167 00010D19 3C02                <1> 	cmp	al, 2
 14168                              <1> 	;jnb	error ; CF = 1 & AL = 2 (& last error = 0)
 14169                              <1> 	; 23/07/2022
 14170 00010D1B 7205                <1> 	jb	short syspri_0
 14171 00010D1D E92DC0FFFF          <1> 	jmp	error
 14172                              <1> syspri_0:
 14173 00010D22 FECB                <1> 	dec	bl
 14174 00010D24 80FB02              <1> 	cmp	bl, 2
 14175 00010D27 7602                <1> 	jna	short syspri_1
 14176 00010D29 B302                <1> 	mov	bl, 2
 14177                              <1> syspri_1:
 14178 00010D2B 881D[66010300]      <1> 	mov	[u.pri], bl
 14179 00010D31 80FB02              <1> 	cmp	bl, 2
 14180                              <1> 	;jb	sysret
 14181                              <1> 	; 23/07/2022
 14182 00010D34 720F                <1> 	jb	short syspri_2	; jmp sysret
 14183                              <1> 
 14184                              <1> 	; here...
 14185                              <1> 	; Priority of current process has been changed to high
 14186                              <1> 	; ('run for event') but current process will be added to
 14187                              <1> 	; 'run as normal' queue. ('run for event' high priority
 14188                              <1> 	; queue is under control of timer -& RTC- interrupt only!) 
 14189                              <1> 	;
 14190                              <1> 	; (Otherwise, process can fall into black hole!
 14191                              <1> 	; e.g. if it is not in waiting list and it has not got 
 14192                              <1> 	; a timer event and it is not in a run queue!
 14193                              <1> 	; Because, when [u.pri] is 2, 'tswap/tswitch' will not 
 14194                              <1> 	; add the stopping process to a run queue.)
 14195                              <1> 
 14196 00010D36 A0[6D010300]        <1> 	mov	al, [u.uno]
 14197 00010D3B BB[0C010300]        <1> 	mov	ebx, runq_normal ; normal priority !
 14198                              <1> 				 ; [u.pri] is set to high
 14199                              <1> 				 ; but 'runq_event' queue is set
 14200                              <1> 				 ; only by the kernel's timer
 14201                              <1> 				 ; event function (timer interrupt). 
 14202 00010D40 E890FFFFFF          <1> 	call	putlu
 14203                              <1> syspri_2:
 14204 00010D45 E925C0FFFF          <1> 	jmp	sysret
 14205                              <1> 
 14206                              <1> cpass: ; / get next character from user area of core and put it in AL (r1)
 14207                              <1> 	; 30/07/2022 - TRDOS 386 Kernel v2.0.5
 14208                              <1> 	; 02/05/2016 - TRDOS 386 (TRDOS v2.0)
 14209                              <1> 	; 19/05/2015 - 18/10/2015 (Retro UNIX 386 v1)
 14210                              <1> 	; 14/08/2013 - 20/09/2013 (Retro UNIX 8086 v1)
 14211                              <1> 	; INPUTS -> 
 14212                              <1> 	;     [u.base] = virtual address in user area
 14213                              <1> 	;     [u.count] = byte count (max.)
 14214                              <1> 	;     [u.pcount] = byte count in page (0 = reset)
 14215                              <1> 	; OUTPUTS -> 
 14216                              <1> 	;     AL = the character which is pointed by [u.base]
 14217                              <1> 	;     zf = 1 -> transfer count has been completed
 14218                              <1>         ;
 14219                              <1> 	; ((Modified registers: EAX, EDX, ECX))
 14220                              <1> 	
 14221                              <1> 	; 30/07/2022
 14222 00010D4A 29C0                <1> 	sub	eax, eax
 14223                              <1> 	
 14224 00010D4C 3905[44010300]      <1> 	cmp	[u.count], eax ; 0
 14225                              <1> 	;cmp 	dword [u.count], 0  ; have all the characters been transferred
 14226                              <1> 			    	    ; i.e., u.count, # of chars. left
 14227 00010D52 763D                <1> 	jna	short cpass_3	    ; to be transferred = 0?) yes, branch
 14228 00010D54 FF0D[44010300]      <1> 	dec	dword [u.count]	    ; no, decrement u.count
 14229                              <1>         ; 19/05/2015 
 14230                              <1> 	;(Retro UNIX 386 v1 - translation from user's virtual address
 14231                              <1> 	;		      to physical address
 14232                              <1> 	; 30/07/2022
 14233 00010D5A 663905[80010300]    <1> 	cmp	[u.pcount], ax ; 0
 14234                              <1> 	;cmp	word [u.pcount], 0 ; byte count in page = 0 (initial value)
 14235                              <1> 			     ; 1-4095 --> use previous physical base address
 14236                              <1> 			     ; in [u.pbase]
 14237 00010D61 770D                <1> 	ja	short cpass_1
 14238                              <1> 	; 30/07/2022
 14239 00010D63 3905[78010300]      <1> 	cmp	[u.ppgdir], eax ; 0
 14240                              <1> 	;cmp	dword [u.ppgdir], 0 ; is the caller os kernel
 14241 00010D69 7427                <1>         je      short cpass_k       ; (sysexec, '/etc/init') ?  (MainProg)
 14242 00010D6B E860FDFFFF          <1> 	call	trans_addr_r
 14243                              <1> cpass_1:
 14244 00010D70 66FF0D[80010300]    <1> 	dec	word [u.pcount]
 14245                              <1> cpass_2: 
 14246 00010D77 8B15[7C010300]      <1> 	mov	edx, [u.pbase]
 14247 00010D7D 8A02                <1> 	mov	al, [edx]	; take the character pointed to 
 14248                              <1> 				; by u.base and put it in r1
 14249 00010D7F FF05[48010300]      <1> 	inc	dword [u.nread] ; increment no. of bytes transferred
 14250 00010D85 FF05[40010300]      <1> 	inc	dword [u.base]  ; increment the buffer address to point to the
 14251                              <1> 			        ; next byte
 14252 00010D8B FF05[7C010300]      <1> 	inc	dword [u.pbase]
 14253                              <1> cpass_3:
 14254 00010D91 C3                  <1> 	retn
 14255                              <1> cpass_k:
 14256                              <1> 	; 02/07/2015
 14257                              <1> 	; The caller is os kernel 
 14258                              <1> 	; (get sysexec arguments from kernel's memory space)
 14259 00010D92 8B1D[40010300]      <1> 	mov	ebx, [u.base]
 14260 00010D98 66C705[80010300]00- <1>         mov     word [u.pcount], PAGE_SIZE ; 4096
 14260 00010DA0 10                  <1>
 14261 00010DA1 891D[7C010300]      <1> 	mov	[u.pbase], ebx
 14262 00010DA7 EBCE                <1> 	jmp	short cpass_2
 14263                              <1> 
 14264                              <1> transfer_to_user_buffer: ; fast transfer
 14265                              <1> 	; 27/05/2016
 14266                              <1> 	; 16/05/2016 - TRDOS 386 (TRDOS v2.0)
 14267                              <1> 	;
 14268                              <1> 	; INPUT ->
 14269                              <1> 	;	ESI = source address in system space
 14270                              <1> 	;	EDI = user's buffer address
 14271                              <1> 	;	ECX = transfer (byte) count
 14272                              <1> 	;	[u.pgdir] = user's page directory
 14273                              <1> 	; OUTPUT ->
 14274                              <1> 	;	ECX = actual transfer count
 14275                              <1> 	;	cf = 1 -> error
 14276                              <1> 	;	[u.count] = remain byte count
 14277                              <1> 	;
 14278                              <1> 	; Modified registers: eax, ecx
 14279                              <1> 	;
 14280                              <1> 
 14281 00010DA9 21C9                <1> 	and	ecx, ecx
 14282 00010DAB 743B                <1> 	jz	short ttub_4
 14283                              <1> 
 14284 00010DAD 890D[44010300]      <1> 	mov	[u.count], ecx
 14285                              <1> 	
 14286 00010DB3 57                  <1> 	push	edi
 14287 00010DB4 56                  <1> 	push	esi
 14288 00010DB5 53                  <1> 	push	ebx
 14289 00010DB6 52                  <1> 	push	edx
 14290 00010DB7 51                  <1> 	push	ecx
 14291                              <1> 
 14292 00010DB8 89FB                <1> 	mov	ebx, edi
 14293 00010DBA 81C300004000        <1> 	add	ebx, CORE ; 27/05/2016
 14294                              <1> ttub_1:
 14295                              <1> 	; ebx = virtual (linear) address
 14296                              <1> 	; [u.pgdir] = user's page directory
 14297 00010DC0 E8124DFFFF          <1>        	call	get_physical_addr_x ; get physical address
 14298 00010DC5 7222                <1> 	jc	short ttub_5
 14299                              <1> 	; eax = physical address 
 14300                              <1> 	; ecx = remain byte count in page (1-4096)
 14301 00010DC7 89C7                <1> 	mov	edi, eax
 14302 00010DC9 A1[44010300]        <1> 	mov	eax, [u.count]
 14303 00010DCE 39C1                <1> 	cmp	ecx, eax
 14304 00010DD0 7602                <1> 	jna	short ttub_2
 14305 00010DD2 89C1                <1> 	mov	ecx, eax
 14306                              <1> ttub_2:	
 14307 00010DD4 29C8                <1> 	sub	eax, ecx
 14308 00010DD6 01CB                <1> 	add	ebx, ecx
 14309 00010DD8 F3A4                <1> 	rep	movsb
 14310 00010DDA A3[44010300]        <1> 	mov	[u.count], eax
 14311 00010DDF 09C0                <1> 	or	eax, eax
 14312 00010DE1 75DD                <1> 	jnz	short ttub_1
 14313                              <1> ttub_retn:
 14314                              <1> tfub_retn:
 14315 00010DE3 59                  <1> 	pop	ecx ; transfer count = actual transfer count
 14316                              <1> ttub_3:
 14317 00010DE4 5A                  <1> 	pop	edx
 14318 00010DE5 5B                  <1> 	pop	ebx
 14319 00010DE6 5E                  <1> 	pop	esi
 14320 00010DE7 5F                  <1> 	pop	edi
 14321                              <1> ttub_4:
 14322 00010DE8 C3                  <1> 	retn
 14323                              <1> ttub_5:
 14324 00010DE9 59                  <1> 	pop	ecx
 14325 00010DEA 2B0D[44010300]      <1> 	sub	ecx, [u.count] ; actual transfer count
 14326 00010DF0 F9                  <1> 	stc
 14327 00010DF1 EBF1                <1> 	jmp	short ttub_3
 14328                              <1> 
 14329                              <1> transfer_from_user_buffer: ; fast transfer
 14330                              <1> 	; 27/05/2016
 14331                              <1> 	; 16/05/2016 - TRDOS 386 (TRDOS v2.0)
 14332                              <1> 	;
 14333                              <1> 	; INPUT ->
 14334                              <1> 	;	ESI = user's buffer address
 14335                              <1> 	;	EDI = destination address in system space
 14336                              <1> 	;	ECX = transfer (byte) count
 14337                              <1> 	;	[u.pgdir] = user's page directory
 14338                              <1> 	; OUTPUT ->
 14339                              <1> 	;	ecx = actual transfer count
 14340                              <1> 	;	cf = 1 -> error
 14341                              <1> 	;	[u.count] = remain byte count
 14342                              <1> 	;
 14343                              <1> 	; Modified registers: eax, ecx
 14344                              <1> 	;
 14345                              <1> 
 14346 00010DF3 21C9                <1> 	and	ecx, ecx
 14347                              <1> 	;jz	short tfub_4
 14348 00010DF5 74F1                <1> 	jz	short ttub_4
 14349                              <1> 
 14350 00010DF7 890D[44010300]      <1> 	mov	[u.count], ecx
 14351                              <1> 	
 14352 00010DFD 57                  <1> 	push	edi
 14353 00010DFE 56                  <1> 	push	esi
 14354 00010DFF 53                  <1> 	push	ebx
 14355 00010E00 52                  <1> 	push	edx
 14356 00010E01 51                  <1> 	push	ecx
 14357                              <1> 
 14358 00010E02 89F3                <1> 	mov	ebx, esi
 14359 00010E04 81C300004000        <1> 	add	ebx, CORE ; 27/05/2016
 14360                              <1> tfub_1:
 14361                              <1> 	; ebx = virtual (linear) address
 14362                              <1> 	; [u.pgdir] = user's page directory
 14363 00010E0A E8C84CFFFF          <1>        	call	get_physical_addr_x ; get physical address
 14364                              <1> 	;jc	short tfub_5
 14365 00010E0F 72D8                <1> 	jc	short ttub_5
 14366                              <1> 	; eax = physical address 
 14367                              <1> 	; ecx = remain byte count in page (1-4096)
 14368 00010E11 89C6                <1> 	mov	esi, eax
 14369 00010E13 A1[44010300]        <1> 	mov	eax, [u.count]
 14370 00010E18 39C1                <1> 	cmp	ecx, eax
 14371 00010E1A 7602                <1> 	jna	short tfub_2
 14372 00010E1C 89C1                <1> 	mov	ecx, eax
 14373                              <1> tfub_2:	
 14374 00010E1E 29C8                <1> 	sub	eax, ecx
 14375 00010E20 01CB                <1> 	add	ebx, ecx
 14376 00010E22 F3A4                <1> 	rep	movsb
 14377 00010E24 A3[44010300]        <1> 	mov	[u.count], eax
 14378 00010E29 09C0                <1> 	or	eax, eax
 14379 00010E2B 75DD                <1> 	jnz	short tfub_1
 14380                              <1> 
 14381 00010E2D EBB4                <1> 	jmp	short tfub_retn
 14382                              <1> 
 14383                              <1> ;tfub_retn:
 14384                              <1> ;	pop	ecx ; transfer count = actual transfer count
 14385                              <1> ;tfub_3:
 14386                              <1> ;	pop	edx
 14387                              <1> ;	pop	ebx
 14388                              <1> ;	pop	esi
 14389                              <1> ;	pop	edi
 14390                              <1> ;tfub_4:
 14391                              <1> ;	retn
 14392                              <1> ;tfub_5:
 14393                              <1> ;	pop	ecx
 14394                              <1> ;	sub	ecx, [u.count] ; actual transfer count
 14395                              <1> ;	stc
 14396                              <1> ;	jmp	short tfub_3
 14397                              <1> 
 14398                              <1> sysfff: ; <Find First File>
 14399                              <1> 	; 08/08/2022
 14400                              <1> 	; 30/07/2022 (TRDOS 386 Kernel v2.0.5)
 14401                              <1> 	; 17/10/2016
 14402                              <1> 	; 16/10/2016
 14403                              <1> 	; 15/10/2016 TRDOS 386 (TRDOS v2.0) feature only !
 14404                              <1> 	;           -derived from TRDOS v1.0, INT_21H.ASM-
 14405                              <1> 	;            ("loc_INT21h_find_first_file")
 14406                              <1> 	; TRDOS 8086 (v1.0)
 14407                              <1>         ; 	07/08/2011 
 14408                              <1>         ;	Find First File
 14409                              <1> 	;	INPUT:
 14410                              <1>         ;	    CX= Attributes
 14411                              <1>         ;	    DS:DX= Pointer to filename
 14412                              <1> 	;	MSDOS OUTPUT:
 14413                              <1> 	;	    DTA: (Default address: PSP offset 80h)
 14414                              <1> 	;	    Offset  Descrription
 14415                              <1> 	;	    0	    Reserved for use find next file
 14416                              <1> 	;	    21	    Attribute of file found
 14417                              <1> 	;	    22	    Time stamp of file
 14418                              <1> 	;	    24	    Date stamp of file
 14419                              <1> 	;	    26	    File size in bytes
 14420                              <1> 	;	    30	    Filename and extension (zero terminated)
 14421                              <1> 	;	If cf = 1:
 14422                              <1> 	;	    Error Codes: (in AX)
 14423                              <1> 	;	    	2 - File not found
 14424                              <1> 	;	       18 - No more files
 14425                              <1>         ;
 14426                              <1> 	; TRDOS 386 (v2.0) 
 14427                              <1> 	; 15/10/2016
 14428                              <1> 	;	
 14429                              <1>         ; INPUT ->
 14430                              <1>         ;	   CL = File attributes
 14431                              <1> 	;     	      bit 0 (1) - Read only file (R)
 14432                              <1> 	;             bit 1 (1) - Hidden file (H)
 14433                              <1>         ;             bit 2 (1) - System file (R)
 14434                              <1> 	;             bit 3 (1) - Volume label/name (V)
 14435                              <1>         ;             bit 4 (1) - Subdirectory (D)
 14436                              <1> 	;	      bit 5 (1) - File has been archived (A)
 14437                              <1> 	;	   CH = 0 -> Return basic parameters (24 bytes)
 14438                              <1> 	;	   CH > 0 -> Return FindFile structure/table (128 bytes)
 14439                              <1>         ;          EBX = Pointer to filename (ASCIIZ) -path-
 14440                              <1> 	;	   EDX = File parameters buffer address
 14441                              <1> 	;		(buffer size = 24 bytes if CH input = 0)
 14442                              <1> 	;		(buffer size = 128 bytes if CH input > 0)
 14443                              <1> 	;		 
 14444                              <1> 	; OUTPUT ->
 14445                              <1> 	;	   EAX = 0 if CH input > 0
 14446                              <1> 	;	   EAX = First cluster number of file if CH input = 0
 14447                              <1> 	;	   EDX = File parameters table/structure address
 14448                              <1> 	;	   Basic Parameters:
 14449                              <1> 	;		Offset  Description
 14450                              <1> 	;		------	---------------
 14451                              <1> 	;		0	File Attributes
 14452                              <1> 	;		1	Ambiguous filename chars are used sign
 14453                              <1> 	;			(0 = filename fits exactly with request)
 14454                              <1> 	;			(>0 = ambiguous filename chars are used)
 14455                              <1> 	;	      	2	Time stamp of file
 14456                              <1> 	;		4	Date stamp of file
 14457                              <1> 	;		6	File size in bytes
 14458                              <1> 	;		10	Short Filename (ASCIIZ, max. 13 bytes)
 14459                              <1> 	;		23	Longname Length (1-255) if existing 
 14460                              <1> 	;  
 14461                              <1> 	;          cf = 1 -> Error code in AL
 14462                              <1> 	;
 14463                              <1> 	; Modified Registers: EAX (at the return of system call)
 14464                              <1> 	;  
 14465                              <1> 	; TR-DOS FindFile (FFF) Structure (128 bytes):
 14466                              <1> 	; 09/10/2011 (DIR.ASM) - 10/02/2016 (trdoskx.s)
 14467                              <1> 	;	
 14468                              <1> 	; Offset	Parameter		Size
 14469                              <1> 	; ------	------------------	-------- 
 14470                              <1> 	; 0		FindFile_Drv		1 byte
 14471                              <1> 	; 1		FindFile_Directory	65 bytes
 14472                              <1> 	; 66		FindFile_Name		13 bytes
 14473                              <1> 	; 79		FindFile_LongNameEntryLength 1 byte
 14474                              <1> 	;Above 80 bytes form
 14475                              <1> 	;TR-DOS Source/Destination File FullName Format/Structure
 14476                              <1> 	; 80		FindFile_AttributesMask 1 word
 14477                              <1> 	; 82		FindFile_DirEntry	32 bytes (*)
 14478                              <1> 	; 114		FindFile_DirFirstCluster 1 double word
 14479                              <1> 	; 118		FindFile_DirCluster	1 double word
 14480                              <1> 	; 122		FindFile_DirEntryNumber 1 word
 14481                              <1> 	; 124		FindFile_MatchCounter	1 word
 14482                              <1> 	; 126		FindFile_Reserved	1 word
 14483                              <1>    	; (*) MS-DOS, FAT 12-16-32 classic directory entry (32 bytes)
 14484                              <1> 
 14485                              <1> 	;mov	[u.namep], ebx
 14486                              <1> 	; 16/10/2016
 14487 00010E2F 8915[F4830100]      <1> 	mov	[FFF_UBuffer], edx
 14488 00010E35 66890D[F9830100]    <1> 	mov	[FFF_Attrib], cx ; [FFF_RType] = ch
 14489                              <1> 		    ; Attributes in CL, return data type in CH
 14490 00010E3C 89DE                <1> 	mov	esi, ebx
 14491                              <1> 	; file name is forced, change directory as temporary
 14492                              <1> 	;mov	ax, 1
 14493                              <1> 	;mov	[FFF_Valid], ah ; 0 ; reset ; 17/10/2016
 14494                              <1> 	;call	set_working_path 
 14495 00010E3E E82A120000          <1> 	call	set_working_path_x ; 17/10/2016	
 14496 00010E43 731D                <1> 	jnc	short sysfff_0
 14497                              <1>  
 14498 00010E45 21C0                <1> 	and	eax, eax  ; 0 -> Bad Path!  
 14499 00010E47 7505                <1> 	jnz	short sysfff_err
 14500                              <1> 
 14501                              <1> 	; eax = 0
 14502 00010E49 B80C000000          <1> 	mov	eax, ERR_DIR_NOT_FOUND ; Directory not found !
 14503                              <1> sysfff_err:
 14504 00010E4E A3[1C010300]        <1> 	mov	[u.r0], eax
 14505 00010E53 A3[84010300]        <1> 	mov	[u.error], eax
 14506 00010E58 E8E5120000          <1>         call 	reset_working_path
 14507 00010E5D E9EDBEFFFF          <1> 	jmp	error
 14508                              <1> 
 14509                              <1> sysfff_0:
 14510                              <1> 	;sub	ah, ah ; ah = 0
 14511 00010E62 8A0424              <1> 	mov	al, [esp]
 14512 00010E65 08C0                <1> 	or	al, al
 14513 00010E67 7412                <1> 	jz	short sysfff_2
 14514 00010E69 B410                <1> 	mov	ah, 10h
 14515 00010E6B A808                <1> 	test	al, 08h
 14516 00010E6D 7503                <1> 	jnz	short sysfff_1
 14517 00010E6F 80CC08              <1> 	or	ah, 08h
 14518                              <1> sysfff_1:
 14519 00010E72 2410                <1> 	and	al, 10h ; Directory
 14520 00010E74 7405                <1> 	jz	short sysfff_2
 14521 00010E76 80E408              <1> 	and	ah, 08h
 14522 00010E79 30C0                <1> 	xor	al, al ; When a directory is searched,
 14523                              <1> 		       ; filename will be returned even if
 14524                              <1> 		       ; it is not a directory!
 14525                              <1> 		       ; Because: (in order to prevent
 14526                              <1> 		       ; creating a dir with existing file name)
 14527                              <1> 		       ; Dir and file names must not be same!
 14528                              <1> 		       ; (return attribute must be checked)	
 14529                              <1> sysfff_2:
 14530                              <1> 	; AX = Attributes mask 
 14531                              <1> 		; AL = AND mask (result must be equal to AL)
 14532                              <1> 		; AH = Negative AND mask (result must be ZERO)
 14533                              <1>  	; ESI = FindFile_Name address
 14534                              <1> 
 14535 00010E7B E8107CFFFF          <1> 	call	find_first_file
 14536 00010E80 72CC                <1> 	jc	short sysfff_err ; eax = 2 (File not found !)
 14537                              <1> 
 14538                              <1> 	; ESI = Directory Entry (FindFile_DirEntry) Location
 14539                              <1> 	; EDI = Directory Buffer Directory Entry Location
 14540                              <1> 	; EAX = File Size
 14541                              <1> 	;  BL = Attributes of The File/Directory
 14542                              <1> 	;  BH = Long Name Yes/No Status (>0 is YES)
 14543                              <1> 	;  DX > 0 : Ambiguous filename chars are used
 14544                              <1> 
 14545                              <1> sysfff_3:
 14546                              <1> 	; 16/10/2016
 14547 00010E82 668B0D[F9830100]    <1> 	mov	cx, [FFF_Attrib]
 14548                              <1> 	; Attribs in CL, return data type in CH
 14549                              <1> 
 14550                              <1> 	;or	cl, cl
 14551                              <1> 	;jz	short sysfff_4 ; 0 = No filter
 14552 00010E89 80F1FF              <1> 	xor	cl, 0FFh
 14553 00010E8C 20D9                <1> 	and	cl, bl
 14554 00010E8E 7409                <1> 	jz	short sysfff_4
 14555                              <1> 
 14556                              <1> 	;mov	eax, 2 ; 'file not found !' error
 14557                              <1> 	;jmp	short sysfff_err_1
 14558                              <1> 
 14559                              <1> 	; 16/10/2016
 14560 00010E90 E8A87CFFFF          <1> 	call	find_next_file
 14561 00010E95 72B7                <1> 	jc	short sysfff_err ; eax = 12 (no more files !)
 14562 00010E97 EBE9                <1> 	jmp	short sysfff_3
 14563                              <1> 
 14564                              <1> sysfff_4:
 14565 00010E99 20ED                <1> 	and	ch, ch ; [FFF_RType]
 14566 00010E9B 740C                <1> 	jz	short sysfff_5
 14567                              <1> 	;mov	ecx, 128 ; ; transfer length
 14568                              <1> 	; 30/07/2022
 14569 00010E9D 29C9                <1> 	sub	ecx, ecx
 14570 00010E9F B180                <1> 	mov	cl, 128
 14571 00010EA1 880D[F8830100]      <1> 	mov	[FFF_Valid], cl
 14572                              <1> sysfnf_11:
 14573                              <1> 	; ecx = 128
 14574                              <1> 	; 08/08/2022
 14575                              <1> 	;mov	esi, FindFile_Drv
 14576 00010EA7 EB3F                <1> 	jmp	short sysfff_6	
 14577                              <1> sysfff_5:
 14578                              <1> 	;;mov	esi, FindFile_DirEntry
 14579                              <1> 	;mov	ecx, 24  ; transfer length
 14580                              <1> 	; 30/07/2022
 14581                              <1> 	;sub	ecx, ecx
 14582                              <1> 	;mov	cl, 24
 14583                              <1> 	;mov	[FFF_Valid], cl
 14584 00010EA9 C605[F8830100]18    <1> 	mov	byte [FFF_Valid], 24
 14585                              <1> sysfnf_12:
 14586 00010EB0 BF[C4880100]        <1> 	mov	edi, DTA ; FFF data transfer address
 14587                              <1> 	;mov	al, [esi+DirEntry_Attr] ; 11
 14588 00010EB5 88D8                <1> 	mov	al, bl ; File/Dir Attributes
 14589 00010EB7 887F17              <1> 	mov	[edi+23], bh ; Longname length (0= none)
 14590 00010EBA AA                  <1> 	stosb
 14591 00010EBB 88D0                <1> 	mov	al, dl ; DL is for '?'
 14592 00010EBD 00F0                <1> 	add	al, dh ; DH is for '*'
 14593                              <1> 	; AL > 0 if ambiguous file name wildcards are used
 14594 00010EBF AA                  <1> 	stosb
 14595 00010EC0 8B4616              <1> 	mov	eax, [esi+DirEntry_WrtTime] ; 22
 14596 00010EC3 AB                  <1>         stosd	; DirEntry_WrtTime & DirEntry_WrtDate
 14597 00010EC4 8B461C              <1>         mov	eax, [esi+DirEntry_FileSize] ; 28
 14598 00010EC7 AB                  <1>         stosd
 14599 00010EC8 668B4614            <1> 	mov	ax, [esi+DirEntry_FstClusHI] ; 20
 14600                              <1> 	;shl	ax, 16
 14601                              <1> 	; 23/07/2022 (BugFix)
 14602 00010ECC C1E010              <1> 	shl	eax, 16 
 14603 00010ECF 668B461A            <1> 	mov	ax, [esi+DirEntry_FstClusLO] ; 26 
 14604 00010ED3 A3[1C010300]        <1> 	mov	[u.r0], eax ; First Cluster
 14605                              <1> 
 14606                              <1>         ;mov	esi, FindFile_DirEntry
 14607 00010ED8 E8A2120000          <1> 	call	get_file_name
 14608                              <1> 
 14609 00010EDD 8A0D[F8830100]      <1> 	mov	cl, [FFF_Valid]
 14610 00010EE3 BE[C4880100]        <1>        	mov	esi, DTA ; FFF data transfer address
 14611                              <1> sysfff_6:
 14612 00010EE8 8B3D[F4830100]      <1> 	mov	edi, [FFF_UBuffer] ; user's buffer address (edx)
 14613 00010EEE E8B6FEFFFF          <1> 	call	transfer_to_user_buffer
 14614                              <1> 
 14615 00010EF3 890D[1C010300]      <1> 	mov	[u.r0], ecx ; actual transfer count
 14616 00010EF9 E844120000          <1>         call 	reset_working_path
 14617 00010EFE E96CBEFFFF          <1> 	jmp	sysret
 14618                              <1> 
 14619                              <1> sysfnf: ; <Find Next File>
 14620                              <1> 	; 29/08/2023 (TRDOS 386 Kernel v2.0.6)
 14621                              <1> 	; 08/08/2022
 14622                              <1> 	; 30/07/2022 (TRDOS 386 Kernel v2.0.5)
 14623                              <1> 	; 16/10/2016 TRDOS 386 (TRDOS v2.0) feature only !
 14624                              <1> 	;           -derived from TRDOS v1.0, INT_21H.ASM-
 14625                              <1> 	;            ("loc_INT21h_find_next_file")
 14626                              <1> 	; TRDOS 8086 (v1.0)
 14627                              <1>         ; 	07/08/2011 
 14628                              <1>         ;	Find First File
 14629                              <1> 	;	INPUT:
 14630                              <1>         ;	    none
 14631                              <1> 	;	MSDOS OUTPUT:
 14632                              <1> 	;	    DTA: (Default address: PSP offset 80h)
 14633                              <1> 	;	    Offset  Descrription
 14634                              <1> 	;	    0	    Reserved for use find next file
 14635                              <1> 	;	    21	    Attribute of file found
 14636                              <1> 	;	    22	    Time stamp of file
 14637                              <1> 	;	    24	    Date stamp of file
 14638                              <1> 	;	    26	    File size in bytes
 14639                              <1> 	;	    30	    Filename and extension (zero terminated)
 14640                              <1> 	;	If cf = 1:
 14641                              <1> 	;	    Error Codes: (in AX)
 14642                              <1> 	;	       18 - No more files
 14643                              <1>         ;
 14644                              <1> 	; TRDOS 386 (v2.0) 
 14645                              <1> 	; 16/10/2016
 14646                              <1> 	;	
 14647                              <1>         ; INPUT ->
 14648                              <1>        	; 	   none
 14649                              <1> 	; OUTPUT ->
 14650                              <1> 	;	   EAX = 0 if CH input of 'Find First File' > 0
 14651                              <1> 	;	   EAX = First cluster number of file
 14652                              <1> 	;		 if CH input of 'Find First File' = 0	
 14653                              <1> 	;	   EDX = File parameters table/structure address
 14654                              <1> 	;
 14655                              <1> 	;          cf = 1 -> Error code in AL
 14656                              <1> 	;
 14657                              <1>  	; Modified Registers: EAX (at the return of system call)
 14658                              <1> 
 14659                              <1> 	;	
 14660                              <1> 	; Note: If byte [FFF_Valid] = 0
 14661                              <1> 	;	'sysfnf' will return with 'no more files' error.
 14662                              <1> 	;	If byte [FFF_Valid] = 24
 14663                              <1> 	;	'sysfnf' will return with 32 bytes basic parameters
 14664                              <1> 	;	at the address which is in EDX.
 14665                              <1> 	;	If byte [FFF_Valid] = 128
 14666                              <1> 	;	'sysfnf' will return with 128 bytes Find File 
 14667                              <1> 	;	Structure/Table at the address which is in EDX.
 14668                              <1> 	
 14669 00010F03 803D[F8830100]00    <1> 	cmp	byte [FFF_Valid], 0
 14670 00010F0A 7713                <1> 	ja	short stsfnf_0
 14671                              <1>  	; 'no more files !' error 
 14672                              <1> 	;mov	eax, ERR_NO_MORE_FILES ; 12
 14673                              <1> 	; 30/07/2022
 14674 00010F0C 29C0                <1> 	sub	eax, eax
 14675 00010F0E B00C                <1> 	mov	al, ERR_NO_MORE_FILES ; 12
 14676 00010F10 A3[1C010300]        <1> 	mov	[u.r0], eax
 14677 00010F15 A3[84010300]        <1> 	mov	[u.error], eax
 14678 00010F1A E930BEFFFF          <1> 	jmp	error
 14679                              <1> stsfnf_0:
 14680                              <1> 	;cmp	byte [FFF_Valid], 128
 14681                              <1> 	;je	short stsfnf_1
 14682                              <1> 	;cmp	byte [FFF_Valid], 24
 14683                              <1> 	;je	short stsfnf_1
 14684                              <1> 	;mov	[FFF_Valid], 24 ; Default
 14685                              <1> stsfnf_1:
 14686 00010F1F 0FB61D[0A780100]    <1> 	movzx	ebx, byte [Current_Drv]
 14687 00010F26 66891D[FE830100]    <1> 	mov	[SWP_DRV], bx
 14688 00010F2D 8A15[AA800100]      <1> 	mov	dl, [FindFile_Drv]
 14689 00010F33 38DA                <1> 	cmp	dl, bl
 14690 00010F35 7535                <1> 	jne	short stsfnf_2
 14691 00010F37 86FB                <1> 	xchg	bh, bl
 14692 00010F39 BE00010900          <1> 	mov	esi, Logical_DOSDisks
 14693 00010F3E 01DE                <1> 	add	esi, ebx
 14694 00010F40 EB37                <1> 	jmp	short sysfnf_3
 14695                              <1> 
 14696                              <1> sysfnf_8:
 14697 00010F42 E87CB4FFFF          <1> 	call	load_FAT_sub_directory	 
 14698 00010F47 7275                <1> 	jc	short sysfnf_err_1 ; read error (no FNF stop)
 14699                              <1> 
 14700                              <1> sysfnf_9:
 14701 00010F49 E8EF7BFFFF          <1> 	call	find_next_file
 14702 00010F4E 7263                <1> 	jc	short sysfnf_5
 14703                              <1> 	; 08/08/2022
 14704                              <1> 	; esi = FindFile_Drv
 14705                              <1> 
 14706 00010F50 A0[F9830100]        <1> 	mov	al, [FFF_Attrib]
 14707                              <1> 	;or	al, al
 14708                              <1> 	;jz	short sysfnf_10 ; 0 = No filter
 14709 00010F55 34FF                <1> 	xor	al, 0FFh
 14710 00010F57 20D8                <1> 	and	al, bl
 14711 00010F59 75EE                <1> 	jnz	short sysfnf_9 ; search for next file until
 14712                              <1> 			       ; an error return from
 14713                              <1> 			       ; find_next_file procedure
 14714                              <1> sysfnf_10:
 14715                              <1>         ;movzx	ecx, byte [FFF_Valid]
 14716                              <1> 	;cmp	cl, 128 ; complete FindFile structure/table 
 14717                              <1> 	;je	sysfnf_11
 14718                              <1> 	;;cmp	cl, 24  ; basic parameters
 14719                              <1> 	;;je	sysfnf_12       
 14720                              <1> 	;jmp	sysfnf_12
 14721                              <1> 	; 30/07/2022
 14722 00010F5B 0FB60D[F8830100]    <1> 	movzx	ecx, byte [FFF_Valid]
 14723 00010F62 80F980              <1> 	cmp	cl, 128
 14724                              <1> 	;jne	short sysfnf_12
 14725                              <1> 	;jmp	short sysfnf_11	
 14726                              <1> 	; 08/08/2022
 14727                              <1> 	;je	short sysfnf_6 ; esi = FindFile_Drv
 14728                              <1> 	; 29/08/2023 (BugFix)
 14729 00010F65 7481                <1> 	je	short sysfff_6 ; esi = FindFile_Drv
 14730                              <1> 	
 14731 00010F67 E944FFFFFF          <1> 	jmp	sysfnf_12
 14732                              <1> 
 14733                              <1> stsfnf_2:
 14734 00010F6C FE05[FF830100]      <1> 	inc	byte [SWP_DRV_chg]
 14735                              <1> 
 14736 00010F72 E86B68FFFF          <1> 	call	change_current_drive
 14737 00010F77 7245                <1> 	jc	short sysfnf_err_1 ; read error ! 
 14738                              <1> 				   ; (do not stop, because
 14739                              <1> 				   ; we don't have a
 14740                              <1> 				   ; 'no more files'
 14741                              <1> 				   ; -file not found- error,
 14742                              <1> 				   ; next sysfnf system call
 14743                              <1> 				   ; may solve the problem,
 14744                              <1> 				   ; after re-placing the disk)
 14745                              <1> sysfnf_3:
 14746 00010F79 A1[20810100]        <1> 	mov	eax, [FindFile_DirCluster]
 14747 00010F7E 21C0                <1> 	and	eax, eax
 14748 00010F80 7550                <1> 	jnz	short sysfnf_6
 14749                              <1>         
 14750 00010F82 803D[09780100]02    <1> 	cmp	byte [Current_FATType], 2
 14751 00010F89 772C                <1> 	ja	short sysfnf_err_0 ; invalid, we neeed to stop !?
 14752 00010F8B 803D[09780100]01    <1> 	cmp	byte [Current_FATType], 1
 14753 00010F92 7223                <1> 	jb	short sysfnf_err_0 ; invalid, we neeed to stop !?
 14754                              <1> 
 14755 00010F94 3805[317F0100]      <1> 	cmp	byte [DirBuff_ValidData], al ; 0
 14756 00010F9A 7608                <1> 	jna	short sysfnf_4 
 14757                              <1> 
 14758 00010F9C 3B05[367F0100]      <1> 	cmp	eax, [DirBuff_Cluster] ; 0 ?
 14759 00010FA2 74A5                <1> 	je	short sysfnf_9
 14760                              <1> 
 14761                              <1> 	;cmp	byte [Current_Dir_Level], 0
 14762                              <1>         ;ja	short sysfnf_4  
 14763                              <1>         ;jna	short sysfnf_9 
 14764                              <1> 
 14765                              <1> sysfnf_4:
 14766 00010FA4 FE05[FF830100]      <1> 	inc	byte [SWP_DRV_chg]
 14767 00010FAA E896B3FFFF          <1> 	call 	load_FAT_root_directory
 14768 00010FAF 7398                <1> 	jnc	short sysfnf_9
 14769                              <1> 	; eax = error code (17, 'drv not ready or read error')
 14770 00010FB1 EB0B                <1> 	jmp	short sysfnf_err_1 ; read error ! (no FNF stop)
 14771                              <1> 				   ; (if you want, try again, 
 14772                              <1> 				   ;  after re-placing the disk)
 14773                              <1> sysfnf_5:	
 14774 00010FB3 3C0C                <1> 	cmp	al, 12 ; 'no more files' error
 14775 00010FB5 7507                <1> 	jne	short sysfnf_err_1 ; (no FNF stop -sysfnf will try
 14776                              <1> 				   ;  to read the directory again,
 14777                              <1> 				   ;  if the user calls sysfnf
 14778                              <1> 				   ;  just after this error return-)
 14779                              <1> 	; (FNF stop -sysfnf will not try
 14780                              <1> 	;  to read the directory again-)	
 14781                              <1> 
 14782                              <1> sysfnf_err_0:
 14783 00010FB7 C605[F8830100]00    <1> 	mov	byte [FFF_Valid], 0 ; FNF stop sign
 14784                              <1> sysfnf_err_1:
 14785 00010FBE A3[1C010300]        <1> 	mov	[u.r0], eax
 14786 00010FC3 A3[84010300]        <1> 	mov	[u.error], eax
 14787 00010FC8 E875110000          <1> 	call	reset_working_path
 14788 00010FCD E97DBDFFFF          <1> 	jmp	error
 14789                              <1> 	  
 14790                              <1> sysfnf_6:
 14791 00010FD2 803D[317F0100]00    <1> 	cmp	byte [DirBuff_ValidData], 0
 14792 00010FD9 760D                <1> 	jna	short sysfnf_7
 14793                              <1> 
 14794 00010FDB 3B05[367F0100]      <1> 	cmp	eax, [DirBuff_Cluster]
 14795                              <1> 	;je	short sysfnf_9
 14796                              <1> 	; 08/08/2022
 14797 00010FE1 7505                <1> 	jne	short sysfnf_7
 14798 00010FE3 E961FFFFFF          <1> 	jmp	sysfnf_9
 14799                              <1> sysfnf_7:
 14800 00010FE8 FE05[FF830100]      <1> 	inc	byte [SWP_DRV_chg]
 14801 00010FEE 803D[09780100]01    <1> 	cmp	byte [Current_FATType], 1
 14802                              <1> 	;jnb	short sysfnf_8
 14803                              <1> 	; 08/08/2022
 14804 00010FF5 7205                <1> 	jb	short sysfnf_13
 14805 00010FF7 E946FFFFFF          <1> 	jmp	sysfnf_8
 14806                              <1> sysfnf_13:
 14807                              <1> 	; Singlix (TRFS) File System 
 14808                              <1> 	; (access via compatibility buffer)
 14809 00010FFC E8FCB3FFFF          <1> 	call	load_FS_sub_directory
 14810                              <1> 	;jnc	short sysfnf_9
 14811                              <1> 	;jmp	short sysfnf_err_1 ; read error (no FNF stop)
 14812                              <1> 	; 08/08/2022
 14813 00011001 72BB                <1> 	jc	short sysfnf_err_1
 14814 00011003 E941FFFFFF          <1> 	jmp	sysfnf_9
 14815                              <1> 
 14816                              <1> writei:
 14817                              <1> 	; 08/08/2022
 14818                              <1> 	; 30/07/2022
 14819                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
 14820                              <1> 	; 26/10/2016
 14821                              <1> 	; 25/10/2016
 14822                              <1> 	; 23/10/2016
 14823                              <1> 	; 22/10/2016
 14824                              <1> 	; 19/10/2016 - TRDOS 386 (TRDOS v2.0)
 14825                              <1> 	; 19/05/2015 - 20/05/2015 (Retro UNIX 386 v1)
 14826                              <1> 	; 12/03/2013 - 31/07/2013 (Retro UNIX 8086 v1)
 14827                              <1> 	;
 14828                              <1> 	; Write data to file with first cluster number in EAX
 14829                              <1> 	; 
 14830                              <1> 	; INPUTS ->
 14831                              <1> 	;    EAX - First cluster number of the file
 14832                              <1> 	;    EBX - File number (Open file index number)
 14833                              <1> 	;    u.count - byte count to be written
 14834                              <1> 	;    u.base - points to user buffer
 14835                              <1> 	;    u.fofp - points to dword with current file offset
 14836                              <1> 	;    i.size - file size
 14837                              <1> 	;    cdev - logical dos drive number of the file
 14838                              <1> 	; OUTPUTS ->
 14839                              <1> 	;    u.count - cleared
 14840                              <1> 	;    u.nread - accumulates total bytes passed back
 14841                              <1> 	;    i.size - new file size (if file byte offset overs file size)
 14842                              <1> 	;    u.fofp - points to u.off (with new offset value)	
 14843                              <1> 	;
 14844                              <1> 	; (Retro UNIX Prototype : 11/11/2012 - 18/11/2012, UNIXCOPY.ASM)
 14845                              <1> 	; ((Modified registers: eax, edx, ebx, ecx, esi, edi, ebp)) 	
 14846                              <1> 
 14847 00011008 31C9                <1> 	xor	ecx, ecx
 14848 0001100A 890D[48010300]      <1> 	mov 	[u.nread], ecx  ; 0
 14849 00011010 66890D[80010300]    <1> 	mov	[u.pcount], cx ; 19/05/2015
 14850 00011017 390D[44010300]      <1> 	cmp 	[u.count], ecx
 14851 0001101D 7701                <1> 	ja 	short writei_1 ; 08/08/2022
 14852 0001101F C3                  <1> 	retn
 14853                              <1> 	; 23/07/2022
 14854                              <1> 	;jna	short dskw_8 ; retn
 14855                              <1> 	
 14856                              <1> writei_1:
 14857                              <1> dskw:
 14858 00011020 881D[B8830100]      <1> 	mov	[writei.ofn], bl ; Open file number
 14859 00011026 880D[F3830100]      <1> 	mov	[setfmod], cl ; 0 ; reset 'update lm date&time' sign
 14860                              <1> dskw_0: 
 14861                              <1> 	; 26/10/2016
 14862                              <1> 	; 22/10/2016, 23/10/2016, 25/10/2016
 14863                              <1> 	; 19/10/2016 - TRDOS 386 (TRDOS v2.0)
 14864                              <1> 	; 31/05/2015 - 25/07/2015 (Retro UNIX 386 v1)
 14865                              <1> 	; 26/04/2013 - 20/09/2013 (Retro UNIX 8086 v1)
 14866                              <1> 	;
 14867                              <1> 	; 01/08/2013 (mkdir_w check)
 14868 0001102C E8D0000000          <1>  	call	mget_w
 14869                              <1> 	; eax = sector/block number
 14870                              <1> 
 14871 00011031 8B1D[30010300]      <1> 	mov     ebx, [u.fofp]
 14872 00011037 8B13                <1> 	mov	edx, [ebx]
 14873 00011039 81E2FF010000        <1> 	and	edx, 1FFh  ; / test the lower 9 bits of the file offset
 14874 0001103F 750C                <1> 	jnz	short dskw_1 ; / if its non-zero, branch
 14875                              <1> 			     ; if zero, file offset = 0,
 14876                              <1> 		       	     ; / 512, 1024,...(i.e., start of new block)
 14877 00011041 813D[44010300]0002- <1> 	cmp	dword [u.count], 512
 14877 00011049 0000                <1>
 14878                              <1> 				; / if zero, is there enough data to fill
 14879                              <1> 				; / an entire block? (i.e., no. of
 14880 0001104B 7331                <1> 	jnb	short dskw_2 ; / bytes to be written greater than 512.? 
 14881                              <1> 			     ; / Yes, branch. Don't have to read block
 14882                              <1> dskw_1: ; in as no past info. is to be saved 
 14883                              <1> 	; (the entire block will be overwritten).
 14884                              <1> 	; 23/10/2016
 14885                              <1> 
 14886 0001104D BB[48050300]        <1> 	mov	ebx, writei_buffer
 14887                              <1> 	; esi = logical dos drive description table address
 14888                              <1> 	; eax = sector number
 14889                              <1> 	; ebx = buffer address (in kernel's memory space)
 14890                              <1> 	; ecx = sector count
 14891                              <1> 	; 30/07/2022
 14892                              <1> 	;mov	ecx, 1
 14893 00011052 31C9                <1> 	xor	ecx, ecx
 14894 00011054 FEC1                <1> 	inc	cl
 14895                              <1> 	; ecx = 1
 14896 00011056 E84A0D0000          <1> 	call	disk_read
 14897                              <1> 	;call	dskrd 	; / no, must retain old info.. 
 14898                              <1> 		       	; / Hence, read block 'r1' into an I/O buffer
 14899 0001105B 7321                <1> 	jnc	short dskw_2
 14900                              <1> 
 14901                              <1> 	; disk read error
 14902                              <1> 	; 30/07/2022
 14903                              <1> 	;mov	eax, 17 ; drive not ready or READ ERROR !
 14904 0001105D 29C0                <1> 	sub	eax, eax
 14905 0001105F B011                <1> 	mov	al, 17
 14906                              <1> dskw_err: ; jump from disk write error
 14907 00011061 A3[1C010300]        <1> 	mov	[u.r0], eax
 14908 00011066 A3[84010300]        <1> 	mov	[u.error], eax
 14909                              <1> 
 14910 0001106B 803D[F3830100]00    <1> 	cmp	byte [setfmod], 0
 14911                              <1> 	;jna	error
 14912                              <1> 	; 23/07/2022
 14913 00011072 7605                <1> 	jna	short writei_err
 14914                              <1> 
 14915 00011074 E8A9030000          <1> 	call	update_file_lmdt ; update last modif. date&time of the file
 14916                              <1> 	;mov	byte [setfmod], 0	
 14917                              <1> writei_err:
 14918 00011079 E9D1BCFFFF          <1> 	jmp	error
 14919                              <1> 
 14920                              <1> dskw_2: ; 3:
 14921                              <1> 	; 23/10/2016
 14922 0001107E C605[94830100]01    <1> 	mov	byte [writei.valid], 1 ; writei buffer contains valid data
 14923 00011085 56                  <1> 	push	esi ; logical dos drive description table address
 14924                              <1> 	; EAX (r1) = block/sector number
 14925                              <1> 	;call	wslot
 14926                              <1> 		; jsr r0,wslot / set write and inhibit bits in I/O queue, 
 14927                              <1> 			   ; / proc. status=0, r5 points to 1st word of data
 14928 00011086 803D[82010300]00    <1> 	cmp	byte [u.kcall], 0
 14929 0001108D 770F                <1> 	ja	short dskw_4 ; zf=0 -> the caller is 'mkdir'
 14930                              <1> 	;
 14931 0001108F 66833D[80010300]00  <1> 	cmp	word [u.pcount], 0
 14932 00011097 7705                <1> 	ja	short dskw_4
 14933                              <1> dskw_3:
 14934                              <1> 	; [u.base] = virtual address to transfer (as source address)
 14935 00011099 E832FAFFFF          <1> 	call	trans_addr_r ; translate virtual address to physical (r)
 14936                              <1> dskw_4:
 14937 0001109E BB[48050300]        <1> 	mov	ebx, writei_buffer
 14938                              <1> 	; EBX (r5) = system (I/O) buffer address
 14939 000110A3 E894FAFFFF          <1> 	call	sioreg
 14940                              <1> 	; ESI = file (user data) offset
 14941                              <1> 	; EDI = sector (I/O) buffer offset
 14942                              <1> 	; ECX = byte count
 14943                              <1> 	;
 14944 000110A8 F3A4                <1>   	rep	movsb
 14945                              <1> 	; 25/07/2015
 14946                              <1> 	; eax = remain bytes in buffer
 14947                              <1>         ;       (check if remain bytes in the buffer > [u.pcount])
 14948 000110AA 09C0                <1> 	or	eax, eax
 14949 000110AC 75EB                <1> 	jnz	short dskw_3 ; (page end before system buffer end!)	
 14950                              <1> 
 14951                              <1> 	; 23/10/2016
 14952 000110AE B101                <1> 	mov	cl, 1
 14953 000110B0 5E                  <1> 	pop	esi
 14954 000110B1 A1[98830100]        <1> 	mov	eax, [writei.sector]
 14955                              <1> 	; esi = logical dos drive description table address
 14956                              <1> 	; eax = sector number
 14957                              <1> 	; ebx = writei buffer address
 14958                              <1> 	; ecx = sector count
 14959 000110B6 E8DB0C0000          <1> 	call	disk_write ; / yes, write the block
 14960 000110BB 7313                <1> 	jnc	short dskw_5
 14961                              <1> 
 14962                              <1> 	;mov	eax, 18 ; drive not ready or WRITE ERROR !
 14963                              <1> 	; 30/08/2022
 14964 000110BD 29C0                <1> 	sub	eax, eax
 14965 000110BF B012                <1> 	mov	al, 18
 14966 000110C1 EB9E                <1> 	jmp	short dskw_err
 14967                              <1> 
 14968                              <1> dskw_7:
 14969                              <1>  	; update last modif. date&time of the file
 14970                              <1> 	; (also updates file size as OF_SIZE)
 14971 000110C3 E85A030000          <1> 	call	update_file_lmdt
 14972                              <1> 	;mov	byte [setfmod], 0	
 14973                              <1> 
 14974                              <1> 	; 03/08/2013
 14975 000110C8 C605[82010300]00    <1> 	mov	byte [u.kcall], 0
 14976                              <1> 	; 23/10/2016
 14977                              <1> 	;mov	eax, [writei.fclust]
 14978                              <1> dskw_8:		; 23/07/2022
 14979 000110CF C3                  <1> 	retn
 14980                              <1> 
 14981                              <1> dskw_5:
 14982                              <1> 	; 26/10/2016
 14983 000110D0 0FB61D[B8830100]    <1> 	movzx	ebx, byte [writei.ofn] ; open file number
 14984 000110D7 C0E302              <1> 	shl	bl, 2 ; *4
 14985 000110DA 8B83[04850100]      <1> 	mov	eax, [ebx+OF_POINTER]
 14986 000110E0 3B83[84850100]      <1> 	cmp	eax, [ebx+OF_SIZE]
 14987 000110E6 7606                <1> 	jna	short dskw_6
 14988 000110E8 8983[84850100]      <1> 	mov	[ebx+OF_SIZE], eax
 14989                              <1> dskw_6:
 14990                              <1> 	;shr	bl, 2
 14991 000110EE 833D[44010300]00    <1>         cmp     dword [u.count], 0 ; / any more data to write?
 14992 000110F5 76CC                <1> 	jna	short dskw_7
 14993 000110F7 A1[A8830100]        <1> 	mov	eax, [writei.fclust]
 14994 000110FC E92BFFFFFF          <1> 	jmp	dskw_0 ; / yes, branch
 14995                              <1> 
 14996                              <1> mget_w:
 14997                              <1> 	; 08/08/2022
 14998                              <1> 	; 25/07/2022
 14999                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
 15000                              <1> 	; 02/11/2016
 15001                              <1> 	; 01/11/2016
 15002                              <1> 	; 23/10/2016, 31/10/2016
 15003                              <1> 	; 22/10/2016 - TRDOS 386 (TRDOS v2.0)
 15004                              <1> 	; 03/06/2015 (Retro UNIX 386 v1, 'mget', u.5s)
 15005                              <1> 	; 22/03/2013 - 31/07/2013 (Retro UNIX 8086 v1)
 15006                              <1> 	;
 15007                              <1> 	; Get existing or (allocate) a new disk block for file
 15008                              <1> 	; 
 15009                              <1> 	; INPUTS ->
 15010                              <1> 	;    [u.fofp] = file offset pointer
 15011                              <1> 	;    [i.size] = file size
 15012                              <1> 	;    [u.count] = byte count	 
 15013                              <1> 	;    EAX = First cluster
 15014                              <1> 	;    [cdev] = Logical dos drive number 	  
 15015                              <1> 	;    [writei.ofn] = File Number
 15016                              <1> 	;		   (Open file index, 0 based)
 15017                              <1> 	;    ([u.off] = file offset)
 15018                              <1> 	; OUTPUTS ->
 15019                              <1> 	;    EAX = logical sector number
 15020                              <1> 	;    ESI = Logical Dos Drive Description Table address
 15021                              <1> 	;
 15022                              <1> 	; Modified registers: EDX, EBX, ECX, ESI, EDI, EBP  
 15023                              <1> 
 15024 00011101 8B35[30010300]      <1>         mov     esi, [u.fofp]
 15025 00011107 8B2E                <1> 	mov	ebp, [esi] ; u.off (or EBX*4+OF_POINTER)
 15026                              <1> 
 15027 00011109 29C9                <1> 	sub	ecx, ecx
 15028 0001110B 8A2D[01010300]      <1> 	mov	ch, [cdev]
 15029                              <1> 
 15030 00011111 BE00010900          <1> 	mov	esi, Logical_DOSDisks
 15031 00011116 01CE                <1> 	add	esi, ecx
 15032                              <1> 
 15033                              <1> 	; 31/10/2016
 15034 00011118 89C3                <1> 	mov	ebx, eax ; First Cluster or FDT address
 15035                              <1> 
 15036 0001111A 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
 15037                              <1> 	;jna	mget_w_14 ; Singlix FS
 15038                              <1> 	; 23/07/2022
 15039 0001111E 7705                <1> 	ja	short mget_w_20
 15040 00011120 E9D8010000          <1> 	jmp	mget_w_14  ; Singlix FS	
 15041                              <1>  
 15042                              <1> mget_w_20:
 15043 00011125 0FB74611            <1> 	movzx	eax, word [esi+LD_BPB+BytesPerSec]
 15044 00011129 0FB65613            <1> 	movzx	edx, byte [esi+LD_BPB+SecPerClust]
 15045 0001112D 8815[96830100]      <1> 	mov	[writei.spc], dl  ; sectors per cluster
 15046 00011133 F7E2                <1> 	mul	edx
 15047                              <1> 	; edx = 0
 15048                              <1> 	; eax = bytes per cluster (<= 65536)
 15049                              <1> 
 15050                              <1> 	; 02/11/2016
 15051 00011135 89C1                <1> 	mov	ecx, eax
 15052 00011137 48                  <1> 	dec	eax
 15053 00011138 66A3[9C830100]      <1> 	mov	[writei.bpc], ax	
 15054                              <1> 	
 15055 0001113E 89E8                <1> 	mov	eax, ebp
 15056 00011140 0305[44010300]      <1> 	add	eax, [u.count] ; next file position
 15057 00011146 3B05[24020300]      <1> 	cmp	eax, [i.size] ; <= file size ?
 15058                              <1> 	;jna	mget_w_4 ; no
 15059                              <1> 	; 23/07/2022
 15060 0001114C 7705                <1> 	ja	short mget_w_21
 15061 0001114E E907010000          <1> 	jmp	mget_w_4
 15062                              <1> mget_w_21:
 15063 00011153 F7F1                <1> 	div	ecx
 15064 00011155 A3[A4830100]        <1> 	mov	[writei.c_index], eax ; cluster index
 15065                              <1> 	; edx = byte offset in cluster (<= 65535)
 15066                              <1> 	;mov	[writei.offset], dx
 15067                              <1> 	;shr	dx, 9 ; / 512
 15068                              <1> 	;mov	[writei.s_index], dl ; sector index in cluster (0 to spc -1)
 15069                              <1> 
 15070 0001115A 29D2                <1> 	sub	edx, edx ; 01/11/2016
 15071 0001115C 8915[98830100]      <1> 	mov 	[writei.sector], edx ; 0
 15072 00011162 668915[9E830100]    <1> 	mov	[writei.offset], dx  ; byte offset in cluster 
 15073 00011169 8815[97830100]      <1> 	mov	[writei.s_index], dl ; sector index in cluster (0 to spc -1)
 15074                              <1> 
 15075 0001116F 89D8                <1> 	mov	eax, ebx ; First Cluster
 15076                              <1> 
 15077                              <1> 	; is this the 1st mget_w or a next mget_w call ? (by 'writei')
 15078 00011171 3815[94830100]      <1> 	cmp	byte [writei.valid], dl ; 0 
 15079 00011177 7624                <1> 	jna	short mget_w_0
 15080                              <1> 
 15081 00011179 8815[94830100]      <1> 	mov 	byte [writei.valid], dl ; 0 ; reset ('writei' will set it) 
 15082                              <1> 
 15083 0001117F 3B05[A8830100]      <1> 	cmp	eax, [writei.fclust]
 15084 00011185 7516                <1> 	jne	short mget_w_0
 15085                              <1> 
 15086 00011187 8A0D[01010300]      <1> 	mov	cl, [cdev]
 15087 0001118D 3A0D[95830100]      <1> 	cmp	cl, [writei.drv]
 15088 00011193 7508                <1> 	jne	short mget_w_0
 15089                              <1>  	; [writei.l_clust] & [writei.l_index] are valid, 
 15090                              <1> 	;  we don't need to get last cluster & last cluster index
 15091 00011195 8B0D[B4830100]      <1> 	mov	ecx, [writei.l_index]
 15092 0001119B EB61                <1> 	jmp	short mget_w_2
 15093                              <1> mget_w_0:
 15094 0001119D A3[A8830100]        <1> 	mov	[writei.fclust], eax ; first cluster
 15095                              <1> 	; edx = 0
 15096 000111A2 A3[A0830100]        <1> 	mov	[writei.cluster], eax ; first cluster ; 01/11/2016
 15097 000111A7 8915[AC830100]      <1> 	mov 	[writei.fs_index], edx ; 0 ; current cluster index
 15098                              <1> 
 15099                              <1> 	; FAT file system (FAT12, FAT16, FAT32)
 15100 000111AD E8D6B7FFFF          <1> 	call	get_last_cluster
 15101                              <1> 	;jc	short mget_w_err ; eax = error code
 15102                              <1> 	; 08/08/2022
 15103 000111B2 7305                <1> 	jnc	short mget_w_25
 15104 000111B4 E992000000          <1> 	jmp	mget_w_err
 15105                              <1> mget_w_25:		
 15106 000111B9 A3[B0830100]        <1> 	mov	[writei.lclust], eax ; last cluster
 15107                              <1> 
 15108 000111BE 8B0D[D4810100]      <1> 	mov	ecx, [glc_index] ; last cluster index
 15109 000111C4 890D[B4830100]      <1> 	mov	[writei.l_index], ecx
 15110                              <1> 
 15111 000111CA A0[B8830100]        <1> 	mov	al, [writei.ofn]
 15112 000111CF FEC0                <1> 	inc	al
 15113 000111D1 A2[F3830100]        <1> 	mov	[setfmod], al ; update lm date&time sign
 15114                              <1> 
 15115                              <1> mget_w_1:
 15116 000111D6 3B0D[A4830100]      <1> 	cmp	ecx, [writei.c_index]  ; last cluster index
 15117 000111DC 7320                <1> 	jnb	short mget_w_2 ; 01/11/2016
 15118                              <1> 
 15119 000111DE A1[B0830100]        <1> 	mov	eax, [writei.lclust]
 15120                              <1> 	; EAX = Last cluster
 15121 000111E3 E8ABB8FFFF          <1> 	call	add_new_cluster
 15122 000111E8 7261                <1> 	jc	short mget_w_err ; eax = error code
 15123                              <1> 	; edx = 0
 15124 000111EA A3[B0830100]        <1> 	mov	[writei.lclust], eax ; (new) last cluster
 15125 000111EF 8B0D[B4830100]      <1> 	mov	ecx, [writei.l_index]
 15126 000111F5 41                  <1> 	inc	ecx ; add 1 to last cluster index
 15127 000111F6 890D[B4830100]      <1> 	mov	[writei.l_index], ecx ; current last cluster index
 15128                              <1> 
 15129 000111FC EBD8                <1> 	jmp	short mget_w_1
 15130                              <1> 
 15131                              <1> mget_w_2:
 15132 000111FE 89E9                <1> 	mov	ecx, ebp
 15133 00011200 030D[44010300]      <1> 	add	ecx, [u.count]
 15134 00011206 890D[24020300]      <1> 	mov	[i.size], ecx ; save new file size
 15135                              <1> 	;sub	edx, edx ; 0
 15136                              <1> 
 15137 0001120C A0[01010300]        <1> 	mov	al, [cdev]
 15138 00011211 A2[95830100]        <1> 	mov	[writei.drv], al ; physical drive number
 15139                              <1> 	; edx = 0
 15140 00011216 89E8                <1> 	mov	eax, ebp ; file offset
 15141 00011218 0FB70D[9C830100]    <1> 	movzx	ecx, word [writei.bpc] ; bytes per cluster - 1
 15142 0001121F 41                  <1> 	inc	ecx ; bytes per cluster
 15143 00011220 F7F1                <1> 	div	ecx
 15144                              <1> 	; edx = byte offset in cluster (<= 65535)
 15145                              <1> 	; eax = cluster index
 15146 00011222 A3[A4830100]        <1> 	mov	[writei.c_index], eax
 15147 00011227 668915[9E830100]    <1> 	mov	[writei.offset], dx
 15148                              <1> 	;shr	dx, 9 ; / 512
 15149                              <1> 	; 23/07/2022
 15150 0001122E C1EA09              <1> 	shr	edx, 9
 15151 00011231 8815[97830100]      <1> 	mov	[writei.s_index], dl ; sector index in cluster (0 to spc -1)
 15152                              <1> 
 15153                              <1> mget_w_3:
 15154 00011237 3B05[B4830100]      <1> 	cmp	eax, [writei.l_index] ; last cluster index
 15155 0001123D 7538                <1> 	jne	short mget_w_5
 15156                              <1> 
 15157 0001123F A3[AC830100]        <1> 	mov	[writei.fs_index], eax ; cluster index (for next check)
 15158 00011244 A1[B0830100]        <1> 	mov	eax, [writei.lclust] ; last cluster
 15159 00011249 EB6E                <1> 	jmp	short mget_w_10
 15160                              <1> 
 15161                              <1> mget_w_err:
 15162 0001124B A3[84010300]        <1> 	mov	[u.error], eax
 15163 00011250 A3[1C010300]        <1> 	mov	[u.r0], eax
 15164 00011255 E9F5BAFFFF          <1> 	jmp	error
 15165                              <1> 
 15166                              <1> mget_w_4: ; 02/11/2016
 15167                              <1> 	; eax = next file position
 15168 0001125A 2B05[44010300]      <1> 	sub	eax, [u.count] ; current file position
 15169                              <1> 	; edx = 0
 15170                              <1> 	; ecx = bytes per cluster
 15171 00011260 F7F1                <1> 	div	ecx
 15172 00011262 A3[A4830100]        <1> 	mov	[writei.c_index], eax ; cluster index
 15173 00011267 668915[9E830100]    <1> 	mov	[writei.offset], dx
 15174                              <1> 	;shr	dx, 9 ; / 512
 15175                              <1> 	; 23/07/2022
 15176 0001126E C1EA09              <1> 	shr	edx, 9
 15177 00011271 8815[97830100]      <1> 	mov	[writei.s_index], dl ; sector index in cluster (0 to spc -1)
 15178                              <1> 
 15179                              <1> mget_w_5:
 15180 00011277 21C0                <1> 	and	eax, eax ; 0 = First Cluster's index number
 15181 00011279 750C                <1> 	jnz	short mget_w_6
 15182                              <1> 
 15183 0001127B A3[AC830100]        <1> 	mov	[writei.fs_index], eax ; cluster index (for next check)
 15184 00011280 A1[A8830100]        <1> 	mov	eax, [writei.fclust] ; first cluster
 15185 00011285 EB32                <1> 	jmp	short mget_w_10
 15186                              <1> 
 15187                              <1> mget_w_6:
 15188 00011287 3B05[AC830100]      <1> 	cmp	eax, [writei.fs_index] ; current cluster index (>0)
 15189 0001128D 7507                <1> 	jne	short mget_w_7
 15190 0001128F A1[A0830100]        <1> 	mov	eax, [writei.cluster] ; current cluster 
 15191 00011294 EB3A                <1> 	jmp	short mget_w_11
 15192                              <1> 
 15193                              <1> mget_w_7:
 15194 00011296 89C1                <1> 	mov	ecx, eax
 15195 00011298 2B0D[AC830100]      <1> 	sub	ecx, [writei.fs_index]
 15196 0001129E 730D                <1> 	jnc	short mget_w_8
 15197                              <1> 	; get cluster by index from the first cluster
 15198 000112A0 A1[A8830100]        <1> 	mov	eax, [writei.fclust]
 15199 000112A5 8B0D[A4830100]      <1> 	mov	ecx, [writei.c_index]
 15200 000112AB EB05                <1> 	jmp	short mget_w_9
 15201                              <1> 
 15202                              <1> mget_w_8:
 15203 000112AD A1[A0830100]        <1> 	mov	eax, [writei.cluster] ; beginning cluster
 15204                              <1> 	; ecx = cluster sequence number after the beginning cluster
 15205                              <1> 	; sub	edx, edx ; 0
 15206                              <1> 
 15207                              <1> mget_w_9:
 15208                              <1> 	; EAX = Beginning cluster
 15209                              <1> 	; EDX = Sector index in disk/file section
 15210                              <1> 	;	(Only for SINGLIX file system!)
 15211                              <1> 	; ECX = Cluster sequence number after the beginning cluster
 15212                              <1> 	; ESI = Logical DOS Drive Description Table address
 15213 000112B2 E8D0B8FFFF          <1> 	call	get_cluster_by_index
 15214 000112B7 7292                <1> 	jc	short mget_w_err ; error code in EAX
 15215                              <1> 
 15216                              <1> 	; EAX = Cluster number		
 15217                              <1> mget_w_10:
 15218 000112B9 A3[A0830100]        <1> 	mov	[writei.cluster], eax ; FDT number for Singlix File System
 15219                              <1> 
 15220 000112BE 807E0300            <1> 	cmp	byte [esi+LD_FATType], 0
 15221 000112C2 7628                <1> 	jna	short mget_w_13
 15222                              <1> 	; 01/11/2016
 15223 000112C4 8B15[A4830100]      <1> 	mov	edx, [writei.c_index]
 15224 000112CA 8915[AC830100]      <1> 	mov	[writei.fs_index], edx
 15225                              <1> mget_w_11:
 15226                              <1> 	;sub	eax, 2
 15227                              <1> 	; 23/07/2022
 15228 000112D0 48                  <1> 	dec	eax
 15229 000112D1 48                  <1> 	dec	eax
 15230 000112D2 0FB615[96830100]    <1> 	movzx	edx, byte [writei.spc]
 15231 000112D9 F7E2                <1> 	mul	edx
 15232                              <1> 
 15233 000112DB 034668              <1> 	add	eax, [esi+LD_DATABegin]
 15234 000112DE 8A15[97830100]      <1> 	mov	dl, [writei.s_index]
 15235 000112E4 01D0                <1> 	add	eax, edx
 15236                              <1> mget_w_12:
 15237 000112E6 A3[98830100]        <1> 	mov	[writei.sector], eax
 15238                              <1> 	;; buffer validation must be done in writei
 15239                              <1> 	;;mov	byte [writei.valid], 1 
 15240 000112EB C3                  <1> 	retn
 15241                              <1> 
 15242                              <1> mget_w_13:
 15243                              <1> 	; EAX = FDT number (Current Section)
 15244                              <1> 	; EDX = Sector index from the first section (0,1,2,3,4...)
 15245 000112EC 2B15[AC830100]      <1> 	sub	edx, [writei.fs_index]	
 15246                              <1> 	; EDX = Sector index from current section
 15247 000112F2 8915[AC830100]      <1> 	mov	[writei.fs_index], edx
 15248 000112F8 40                  <1> 	inc	eax ; the first data sector in FS disk section	
 15249 000112F9 01D0                <1> 	add	eax, edx
 15250 000112FB EBE9                <1> 	jmp	short mget_w_12
 15251                              <1> 
 15252                              <1> mget_w_14:
 15253 000112FD 8A4E12              <1> 	mov	cl, [esi+LD_FS_BytesPerSec+1]
 15254 00011300 D0E9                <1> 	shr	cl, 1 ;  ; 1 for 512 bytes, 4 for 2048 bytes
 15255 00011302 880D[96830100]      <1> 	mov	[writei.spc], cl  ; sectors per cluster
 15256                              <1> 	; NOTE: writei bytes per sector value is always 512 ! 
 15257 00011308 66C705[9C830100]00- <1> 	mov	word [writei.bpc], 512
 15257 00011310 02                  <1>
 15258                              <1> 
 15259 00011311 89E9                <1> 	mov	ecx, ebp
 15260 00011313 030D[44010300]      <1> 	add	ecx, [u.count] ; next file position
 15261 00011319 3B0D[24020300]      <1> 	cmp	ecx, [i.size] ; <= file size ?
 15262                              <1> 	;jna	mget_w_19 ; no
 15263 0001131F 7705                <1> 	ja	short mget_w_22
 15264                              <1> 	; 23/07/2022
 15265 00011321 E9C6000000          <1> 	jmp	mget_w_19
 15266                              <1> 
 15267                              <1> mget_w_22:
 15268 00011326 29D2                <1> 	sub	edx, edx ; 0
 15269 00011328 8915[98830100]      <1> 	mov 	[writei.sector], edx ; 0
 15270 0001132E 668915[9E830100]    <1> 	mov	[writei.offset], dx  ; byte offset in cluster 
 15271 00011335 8815[97830100]      <1> 	mov	[writei.s_index], dl ; sector index in cluster (0 to spc -1)
 15272                              <1> 
 15273 0001133B C1E909              <1> 	shr	ecx, 9 ; 1 cluster = 512 bytes
 15274 0001133E 890D[A4830100]      <1> 	mov	[writei.c_index], ecx ; section/cluster index
 15275                              <1> 	
 15276 00011344 89D8                <1> 	mov	eax, ebx ; FDT number (First FDT address)
 15277                              <1> 
 15278                              <1> 	; is this the 1st mget_w or a next mget_w call ? (by 'writei')
 15279 00011346 3815[94830100]      <1> 	cmp	byte [writei.valid], dl ; 0 
 15280 0001134C 7624                <1> 	jna	short mget_w_15
 15281                              <1> 
 15282 0001134E 8815[94830100]      <1> 	mov 	byte [writei.valid], dl ; 0 ; reset ('writei' will set it) 
 15283                              <1> 
 15284 00011354 3B05[A8830100]      <1> 	cmp	eax, [writei.fclust]
 15285 0001135A 7516                <1> 	jne	short mget_w_15
 15286                              <1> 
 15287 0001135C 8A0D[01010300]      <1> 	mov	cl, [cdev]
 15288 00011362 3A0D[95830100]      <1> 	cmp	cl, [writei.drv]
 15289 00011368 7508                <1> 	jne	short mget_w_15
 15290                              <1>  	; [writei.l_clust] & [writei.l_index] are valid, 
 15291                              <1> 	;  we don't need to get last cluster & last cluster index
 15292 0001136A 8B0D[B4830100]      <1> 	mov	ecx, [writei.l_index]
 15293 00011370 EB4A                <1> 	jmp	short mget_w_17
 15294                              <1> mget_w_15:
 15295 00011372 A3[A8830100]        <1> 	mov	[writei.fclust], eax ; first section (FDT number)
 15296                              <1> 	; edx = 0
 15297 00011377 8915[A0830100]      <1> 	mov	[writei.cluster], edx ; 0 ; current section
 15298 0001137D 8915[AC830100]      <1> 	mov 	[writei.fs_index], edx ; 0 ; curret section index
 15299                              <1> 
 15300                              <1> 	; eax = FDT number (section 0 header address)
 15301 00011383 E828B8FFFF          <1> 	call	get_last_section
 15302                              <1> 	;jc	short mget_w_err ; eax = error code
 15303                              <1> 	; 08/08/2022
 15304 00011388 7305                <1> 	jnc	short mget_w_26
 15305 0001138A E9BCFEFFFF          <1> 	jmp	mget_w_err
 15306                              <1> mget_w_26:
 15307 0001138F 8915[AC830100]      <1> 	mov 	[writei.fs_index], edx ; sector index in last section
 15308                              <1> 		
 15309 00011395 A3[B0830100]        <1> 	mov	[writei.lclust], eax ; last section address
 15310                              <1> 
 15311 0001139A 8B0D[D4810100]      <1> 	mov	ecx, [glc_index] ; last section index
 15312 000113A0 890D[B4830100]      <1> 	mov	[writei.l_index], ecx
 15313                              <1> 
 15314 000113A6 A0[B8830100]        <1> 	mov	al, [writei.ofn]
 15315 000113AB FEC0                <1> 	inc	al
 15316 000113AD A2[F3830100]        <1> 	mov	[setfmod], al ; update lm date&time sign
 15317                              <1> 
 15318                              <1> mget_w_16:
 15319                              <1> 	; edx = (existing) last section (sector) index
 15320 000113B2 8B0D[A4830100]      <1> 	mov	ecx, [writei.c_index] ; final section (sector) index
 15321 000113B8 29D1                <1> 	sub	ecx, edx
 15322 000113BA 7630                <1> 	jna	short mget_w_19
 15323                              <1> 	; ecx = sector count
 15324                              <1> mget_w_17:
 15325 000113BC A1[B0830100]        <1> 	mov	eax, [writei.lclust]
 15326                              <1> 	; ESI = Logical dos drv desc. table address
 15327                              <1>         ; EAX = Last section
 15328                              <1>         ; (ECX = 0 for directory) 
 15329                              <1>         ; ECX = sector count (except FDT)
 15330 000113C1 E840AEFFFF          <1> 	call	add_new_fs_section
 15331 000113C6 730F                <1> 	jnc	short mget_w_18
 15332                              <1> 
 15333                              <1> 	; If error number = 27h (insufficient disk space)
 15334                              <1> 	; it is needed to check free consequent sectors
 15335                              <1> 	; (1 data sector at least and +1 section header sector) 
 15336                              <1> 
 15337 000113C8 83F827              <1> 	cmp	eax, 27h
 15338                              <1> 	;jne	mget_w_err ; eax = error code
 15339                              <1> 	; 25/07/2022
 15340 000113CB 7405                <1> 	je	short mget_w_24
 15341                              <1> mget_w_23:
 15342 000113CD E979FEFFFF          <1> 	jmp	mget_w_err
 15343                              <1> mget_w_24:
 15344                              <1> 	; ecx = count of free consequent sectors
 15345                              <1> 	; ecx must be > 1 (1 data + 1 header sector)
 15346 000113D2 49                  <1> 	dec	ecx
 15347                              <1> 	;jz	short mget_w_err
 15348                              <1> 	;jmp	short mget_w_17
 15349                              <1> 	; 23/07/2022
 15350 000113D3 75E7                <1> 	jnz	short mget_w_17
 15351                              <1> 	;jmp	mget_w_err
 15352                              <1> 	; 25/07/2022
 15353 000113D5 EBF6                <1> 	jmp	short mget_w_23
 15354                              <1> 
 15355                              <1> mget_w_18:
 15356 000113D7 A3[B0830100]        <1> 	mov	[writei.lclust], eax ; (new) last section
 15357                              <1> 	; ecx = sector count (except section header)
 15358 000113DC 8B15[B4830100]      <1> 	mov	edx, [writei.l_index]
 15359 000113E2 01CA                <1> 	add	edx, ecx ; add sector count to index
 15360 000113E4 8915[B4830100]      <1> 	mov	[writei.l_index], edx
 15361 000113EA EBC6                <1> 	jmp	short mget_w_16
 15362                              <1> 
 15363                              <1> mget_w_19:
 15364 000113EC 89E9                <1> 	mov	ecx, ebp
 15365 000113EE 030D[44010300]      <1> 	add	ecx, [u.count]
 15366 000113F4 890D[24020300]      <1> 	mov	[i.size], ecx ; save new file size
 15367                              <1> 	;sub	edx, edx ; 0
 15368                              <1> 
 15369 000113FA A0[01010300]        <1> 	mov	al, [cdev]
 15370 000113FF A2[95830100]        <1> 	mov	[writei.drv], al ; physical drive number
 15371                              <1> 	; edx = 0
 15372 00011404 89E8                <1> 	mov	eax, ebp ; file offset
 15373 00011406 89C2                <1> 	mov	edx, eax
 15374                              <1> 	; 1 cluster = 512 bytes (for Singlix FS)
 15375 00011408 C1E809              <1> 	shr	eax, 9  ; / 512
 15376 0001140B 81E2FF010000        <1> 	and	edx, 1FFh
 15377                              <1> 	; edx = byte offset in cluster/sector (<= 511)
 15378                              <1> 	; eax = section (sector/cluster) index
 15379 00011411 A3[A4830100]        <1> 	mov	[writei.c_index], eax
 15380 00011416 668915[9E830100]    <1> 	mov	[writei.offset], dx
 15381                              <1> 	;mov	byte [writei.s_index], 0 ; sector index in cluster
 15382 0001141D E915FEFFFF          <1> 	jmp	mget_w_3
 15383                              <1> 
 15384                              <1> update_file_lmdt: ; & update file size
 15385                              <1> 	; 30/07/2022
 15386                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
 15387                              <1> 	; 26/10/2016
 15388                              <1> 	; 24/10/2016
 15389                              <1> 	; 23/10/2016
 15390                              <1> 	; 22/10/2016 - TRDOS 386 (TRDOS v2.0)
 15391                              <1> 	;
 15392                              <1> 	; Update last modification date&time of file
 15393                              <1> 	; (call from syswrite -> writei)
 15394                              <1> 	; ((also updates file size)) // 26/10/2016
 15395                              <1> 	; 
 15396                              <1> 	; INPUT:
 15397                              <1> 	;      byte [setfmod] = open file number
 15398                              <1> 	; OUTPUT:
 15399                              <1> 	;      cf = 0 -> success !
 15400                              <1> 	;      cf = 1 -> lmdt update has been failed!
 15401                              <1> 	;
 15402                              <1> 	; Modified registers: eax, ebx, ecx, edx, esi, edi
 15403                              <1> 	;
 15404                              <1> 
 15405                              <1> 	;cmp	byte [setfmod], 0
 15406                              <1> 	;jna	short uflmdt_2 ; nothing to do
 15407                              <1> 
 15408 00011422 31C0                <1> 	xor	eax, eax
 15409                              <1> 
 15410 00011424 0FB61D[F3830100]    <1> 	movzx	ebx, byte [setfmod]
 15411 0001142B FECB                <1> 	dec	bl ; open file index number (0 based)
 15412                              <1> 
 15413 0001142D 8AA3[84840100]      <1> 	mov	ah, [ebx+OF_DRIVE]
 15414 00011433 BE00010900          <1> 	mov	esi, Logical_DOSDisks
 15415 00011438 01C6                <1> 	add	esi, eax
 15416 0001143A C0E302              <1> 	shl	bl, 2 ; *4	
 15417 0001143D 8B8B[04840100]      <1> 	mov	ecx, [ebx+OF_FCLUSTER] ; first cluster
 15418 00011443 8B93[84860100]      <1> 	mov	edx, [ebx+OF_DIRCLUSTER] ; dir cluster
 15419                              <1> 
 15420 00011449 D0EB                <1> 	shr	bl, 1 ; /2
 15421 0001144B 0FB7BB[84880100]    <1> 	movzx	edi, word [ebx+OF_DIRENTRY]
 15422                              <1> 	
 15423 00011452 803D[317F0100]01    <1> 	cmp	byte [DirBuff_ValidData], 1
 15424 00011459 7265                <1> 	jb	short uflmdt_4
 15425                              <1> 
 15426 0001145B A0[2F7F0100]        <1> 	mov	al, [DirBuff_DRV]
 15427 00011460 2C41                <1> 	sub	al, 'A'	
 15428 00011462 38E0                <1> 	cmp	al, ah
 15429 00011464 755A                <1> 	jne	short uflmdt_4 ; different drive
 15430 00011466 8A4603              <1> 	mov	al, [esi+LD_FATType] 
 15431 00011469 3A05[307F0100]      <1> 	cmp	al, [DirBuff_FATType]
 15432 0001146F 7552                <1> 	jne	short uflmdt_5 ; different FS type
 15433 00011471 3B15[367F0100]      <1> 	cmp	edx, [DirBuff_Cluster]
 15434 00011477 754A                <1> 	jne	short uflmdt_5 ; different cluster
 15435                              <1> 
 15436                              <1> uflmdt_1:
 15437                              <1> 	; Directory buffer is ready here!
 15438                              <1> 	; OF_FCLUSTER must be compared/verified
 15439 00011479 BE00000800          <1> 	mov	esi, Directory_Buffer
 15440                              <1> 	;shl	di, 5 ; dir entry index * 32
 15441                              <1> 	; 23/07/2022
 15442 0001147E C1E705              <1> 	shl	edi, 5 
 15443 00011481 01FE                <1> 	add	esi, edi ; offset
 15444                              <1> 	;
 15445 00011483 F6460B18            <1> 	test	byte [esi+DirEntry_Attr], 18h ; Vol & Dir
 15446 00011487 7564                <1> 	jnz	short uflmdt_2 ; not a valid file !
 15447 00011489 668B4614            <1> 	mov	ax, [esi+DirEntry_FstClusHI]
 15448 0001148D C1E010              <1> 	shl	eax, 16
 15449 00011490 668B461A            <1> 	mov	ax, [esi+DirEntry_FstClusLO]
 15450 00011494 39C8                <1> 	cmp	eax, ecx ; same first cluster ?
 15451                              <1> 	;je	short uflmdt_3 ; yes, it is OK !!!	
 15452                              <1> 	; 23/07/2022
 15453 00011496 7555                <1> 	jne	short uflmdt_2
 15454                              <1> 	
 15455                              <1> uflmdt_3:
 15456                              <1> 	; Update directory entry
 15457                              <1> 	; 26/10/2016
 15458 00011498 D0E3                <1> 	shl	bl, 1 ; *2 
 15459 0001149A 8B83[84850100]      <1> 	mov	eax, [ebx+OF_SIZE] ; file size
 15460 000114A0 89461C              <1> 	mov	[esi+DirEntry_FileSize], eax
 15461                              <1> 	;
 15462 000114A3 E8539AFFFF          <1> 	call	convert_current_date_time
 15463                              <1> 	; OUTPUT -> DX = Date in dos dir entry format
 15464                              <1>         ; 	    AX = Time in dos dir entry format	
 15465 000114A8 66894616            <1> 	mov	[esi+DirEntry_WrtTime], ax
 15466 000114AC 66895618            <1> 	mov	[esi+DirEntry_WrtDate], dx	
 15467 000114B0 66895612            <1> 	mov	[esi+DirEntry_LastAccDate], dx
 15468 000114B4 C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2
 15469                              <1> 	;call	save_directory_buffer
 15470                              <1> 	;retn
 15471                              <1> 	; 23/07/2022
 15472 000114BB E9D09AFFFF          <1> 	jmp	save_directory_buffer	
 15473                              <1> 
 15474                              <1> uflmdt_4:
 15475                              <1> 	; Directory buffer sector read&write
 15476                              <1> 	; 23/10/2016
 15477                              <1> 	;
 15478 000114C0 8A4603              <1> 	mov	al, [esi+LD_FATType]
 15479                              <1> uflmdt_5:
 15480 000114C3 BB[50070300]        <1> 	mov	ebx, rw_buffer ; Common r/w sector buffer addr
 15481                              <1> 		
 15482 000114C8 20C0                <1> 	and	al, al ; 0 = Singlix FS
 15483 000114CA 7428                <1> 	jz	short uflmdt_11
 15484                              <1> 
 15485                              <1> ;uflmdt_12:
 15486 000114CC 21D2                <1> 	and	edx, edx
 15487 000114CE 752B                <1> 	jnz	short uflmdt_9
 15488                              <1> 
 15489 000114D0 3C02                <1> 	cmp	al, 2  ; 3 = FAT32
 15490 000114D2 7724                <1> 	ja	short uflmdt_8
 15491                              <1> 
 15492 000114D4 89F8                <1> 	mov	eax, edi ; directory entry index number
 15493                              <1> 	;shr	ax, 4 ; 16 entries per sector	 
 15494                              <1> 	; 23/07/2022
 15495 000114D6 C1E804              <1> 	shr	eax, 4
 15496 000114D9 034664              <1> 	add	eax, [esi+LD_ROOTBegin]
 15497                              <1> 	; eax = root directory sector
 15498                              <1> uflmdt_6:
 15499 000114DC 50                  <1> 	push	eax ; * ; disk sector address
 15500 000114DD 51                  <1> 	push	ecx ; first cluster	
 15501 000114DE B901000000          <1> 	mov	ecx, 1
 15502                              <1> 	; ecx = sector count
 15503 000114E3 E8BD080000          <1> 	call	disk_read
 15504 000114E8 59                  <1> 	pop	ecx
 15505 000114E9 7324                <1> 	jnc	short uflmdt_10
 15506 000114EB 58                  <1> 	pop	eax ; *
 15507                              <1> uflmdt_7:
 15508 000114EC C3                  <1> 	retn
 15509                              <1> 
 15510                              <1> uflmdt_2:	
 15511                              <1> 	; save directory buffer if has modified/changed sign
 15512                              <1> 	; (It is good to save dir buff even if the searched
 15513                              <1> 	; directory entry is not found !?)
 15514 000114ED E89E9AFFFF          <1> 	call	save_directory_buffer
 15515 000114F2 F9                  <1> 	stc	; update failed
 15516 000114F3 C3                  <1> 	retn
 15517                              <1> 
 15518                              <1> uflmdt_11:
 15519                              <1> 	; 24/10/2016
 15520                              <1> 	; Update last modification date & time of a file
 15521                              <1> 	; on a disk with Singlix File System.
 15522                              <1> 	;
 15523                              <1> 	; (Method: Read the FDT -File Description Table-
 15524                              <1> 	; sector of the file and update the lmdt data fields,
 15525                              <1> 	; then write FDT sector to the disk.
 15526                              <1> 	; /// It is easy but there is compatibility buffer
 15527                              <1> 	; method also for changing directory entry data and
 15528                              <1> 	; also there are some programming issues for Singlix
 15529                              <1> 	; file system (TRFS), which are not completed yet!)
 15530                              <1> 	;
 15531                              <1> 	; Not ready yet ! (24/10/2016)
 15532                              <1> 	; /// Temporary code for error return ! ///
 15533 000114F4 31C0                <1> 	xor	eax, eax
 15534 000114F6 F9                  <1> 	stc
 15535 000114F7 C3                  <1> 	retn	
 15536                              <1> 
 15537                              <1> uflmdt_8:
 15538 000114F8 8B5632              <1> 	mov	edx, [esi+LD_BPB+FAT32_RootFClust]
 15539                              <1> uflmdt_9:
 15540 000114FB 83FA02              <1> 	cmp	edx, 2
 15541 000114FE 72EC                <1> 	jb	short uflmdt_7 ; invalid, nothing to do
 15542                              <1> 
 15543                              <1> 	;sub	edx, 2
 15544                              <1> 	; 30/07/2022
 15545 00011500 4A                  <1> 	dec	edx
 15546 00011501 4A                  <1> 	dec	edx
 15547 00011502 89D0                <1> 	mov	eax, edx
 15548 00011504 0FB65613            <1> 	movzx	edx, byte [esi+LD_BPB+SecPerClust]
 15549 00011508 F7E2                <1> 	mul	edx
 15550 0001150A 034668              <1> 	add	eax, [esi+LD_DATABegin]
 15551                              <1> 	; eax = sub directory (data) sector 
 15552 0001150D EBCD                <1> 	jmp	short uflmdt_6
 15553                              <1> 
 15554                              <1> uflmdt_10:
 15555                              <1> 	; Directory sector buffer is ready here!
 15556                              <1> 	; OF_FCLUSTER must be compared/verified
 15557                              <1> 	; edi = dir entry index number (<= 2047)
 15558 0001150F 6683E70F            <1> 	and	di, 0Fh ; 16 entries per sector
 15559                              <1> 	;shl	di, 5 ; dir entry index * 32
 15560                              <1> 	; 23/07/2022
 15561 00011513 C1E705              <1> 	shl	edi, 5
 15562 00011516 81C7[50070300]      <1> 	add	edi, rw_buffer
 15563                              <1> 	;
 15564 0001151C F6470B18            <1> 	test	byte [edi+DirEntry_Attr], 18h ; Vol & Dir
 15565 00011520 75CB                <1> 	jnz	short uflmdt_2 ; not a valid file !
 15566 00011522 668B5714            <1> 	mov	dx, [edi+DirEntry_FstClusHI]
 15567 00011526 C1E210              <1> 	shl	edx, 16
 15568 00011529 668B571A            <1> 	mov	dx, [edi+DirEntry_FstClusLO]
 15569 0001152D 39CA                <1> 	cmp	edx, ecx ; same first cluster ?
 15570 0001152F 75BC                <1> 	jne	short uflmdt_2 ; no !?
 15571                              <1> 
 15572                              <1> 	; Update directory entry
 15573 00011531 E8C599FFFF          <1> 	call	convert_current_date_time
 15574                              <1> 	; OUTPUT -> DX = Date in dos dir entry format
 15575                              <1>         ; 	    AX = Time in dos dir entry format	
 15576 00011536 66894716            <1> 	mov	[edi+DirEntry_WrtTime], ax
 15577 0001153A 66895718            <1> 	mov	[edi+DirEntry_WrtDate], dx	
 15578 0001153E 66895712            <1> 	mov	[edi+DirEntry_LastAccDate], dx
 15579                              <1> 	
 15580 00011542 58                  <1> 	pop	eax ; *
 15581                              <1> 
 15582 00011543 BB[50070300]        <1> 	mov	ebx, rw_buffer ; Common r/w sector buffer addr
 15583 00011548 B901000000          <1> 	mov	ecx, 1
 15584                              <1> 	; esi = logical dos description table address
 15585                              <1> 	; eax = disk sector number/address (LBA)
 15586                              <1> 	; ecx = sector count
 15587                              <1> 	; ebx = buffer address
 15588 0001154D E844080000          <1> 	call	disk_write
 15589 00011552 7299                <1> 	jc	short uflmdt_2
 15590                              <1> ;uflmdt_12:	
 15591                              <1> 	; save directory buffer if has modified/changed sign
 15592                              <1> 	;call	save_directory_buffer
 15593                              <1> 	;retn
 15594                              <1> 	; 23/07/2022
 15595 00011554 E9379AFFFF          <1> 	jmp	save_directory_buffer
 15596                              <1> 
 15597                              <1> 
 15598                              <1> sysalloc:
 15599                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
 15600                              <1> 	; 14/10/2017
 15601                              <1> 	; 20/08/2017 - 01/09/2017
 15602                              <1> 	; 20/02/2017 - 04/03/2017 - 15/05/2017
 15603                              <1> 	; 19/02/2017 - TRDOS 386 (TRDOS v2.0)
 15604                              <1> 	; (TRDOS 386 feature only!)
 15605                              <1> 	;
 15606                              <1> 	; Allocate Contiguous Memory Block/Pages (for user)
 15607                              <1> 	; (System call for DMA Buffer allocation etc.)	
 15608                              <1> 	;
 15609                              <1> 	; INPUT ->
 15610                              <1> 	;	EBX = Virtual address (for user)
 15611                              <1> 	;	     (Physical memory block/aperture
 15612                              <1> 	;	     will be mapped to this virtual address) 
 15613                              <1> 	;	ECX = Byte Count
 15614                              <1> 	;	     (will be rounded up to page border)
 15615                              <1> 	;	If ECX = 0
 15616                              <1> 	;	    System call will return with an error (cf=1)
 15617                              <1> 	;	    but ECX will contain maximum size of
 15618                              <1> 	;	    available memory aperture and physical
 15619                              <1> 	;	    (beginning) address of that aperture
 15620                              <1> 	;	    (which have maximum size) will be in EAX.
 15621                              <1> 	;	EDX = Upper limit of the requested physical memory
 15622                              <1> 	;	      block/pages.
 15623                              <1> 	;	     (The last byte address of the memory aperture 
 15624                              <1> 	;	      must not be equal to or above this limit.)	
 15625                              <1> 	;	If EDX = 0
 15626                              <1> 	; 	   there is NOLIMIT !
 15627                              <1> 	;	If EDX = 0FFFFFFFFh (-1) 
 15628                              <1> 	;	   ESI = Lower Limit !
 15629                              <1> 	;		(Beginning of the block must not be 'less'
 15630                              <1> 	;		than this.) (Must be equal to or above...)
 15631                              <1> 	;	   EDI = Upper Limit !
 15632                              <1> 	;		(End of the block must be !less! than this)
 15633                              <1> 	;		(The last byte addr of the memory aperture 
 15634                              <1> 	;		must not be equal to or above this limit.)
 15635                              <1> 	;
 15636                              <1> 	; OUTPUT ->
 15637                              <1> 	;	If CF = 0
 15638                              <1> 	;	EAX = Physical address of the allocated memory block
 15639                              <1> 	;	ECX = Allocated bytes (as rounded up to page borders)
 15640                              <1> 	;	EBX = Virtual address (as rounded up)
 15641                              <1> 	;	IF CF = 1
 15642                              <1> 	;	    Requested (size of) Memory block could not be 
 15643                              <1> 	;	    allocated to the user!	
 15644                              <1> 	;	IF CF = 1 & EAX = 0 (Insufficient memory error!)
 15645                              <1> 	;	   ECX = Total number of free bytes
 15646                              <1> 	;	         (not size of available contiguous bytes!)		 	
 15647                              <1> 	;	If CF = 1 & EAX > 0
 15648                              <1> 	;	   there is not a memory aperture with requested size
 15649                              <1> 	;	   but total free mem is not less than requested size.
 15650                              <1> 	;	   EAX = Physical addr of available memory aperture
 15651                              <1> 	;	   	 with max size 
 15652                              <1> 	;	        (but it doesn't fit to the conditions!) 	
 15653                              <1> 	;	   ECX = Size of available memory aperture in bytes.
 15654                              <1> 	;	If CF = 1 -> EAX = 0FFFFFFFFh	
 15655                              <1> 	;	   Conditions/Parameters are wrong !		 		
 15656                              <1> 	;	   ECX is same with input value.
 15657                              <1> 	;
 15658                              <1> 	; Note:	Previously allocated pages will be deallocated if
 15659                              <1> 	;       new allocation conditions are met.
 15660                              <1> 	;
 15661                              <1> 	; Note: u.break control may be included in future versions	
 15662                              <1> 	;
 15663                              <1> 
 15664 00011559 31C0                <1> 	xor	eax, eax ; 0
 15665                              <1> 	; 14/10/2017
 15666 0001155B 4A                  <1> 	dec	edx ; is there a limit ?
 15667 0001155C 7810                <1> 	js	short sysalloc_1 ;  0 -> 0FFFFFFFFh -> NO LIMIT
 15668 0001155E 42                  <1> 	inc	edx ; > 0
 15669                              <1> 	; Check upper address limit
 15670                              <1> 	;(round up to page borders)
 15671 0001155F 81C1FF0F0000        <1> 	add	ecx, PAGE_SIZE-1 ; 4095
 15672 00011565 6681E100F0          <1> 	and	cx, ~PAGE_OFF ; not 4095
 15673 0001156A 39CA                <1> 	cmp	edx, ecx ; upper limit - block size
 15674 0001156C 7224                <1> 	jb	short sysalloc_err
 15675                              <1> sysalloc_1:
 15676                              <1> 	; EAX = Beginning address (physical)
 15677                              <1> 	; EAX = 0 -> Allocate mem block from the 1st proper aperture	
 15678                              <1> 	; ECX = Number of bytes to be allocated		
 15679 0001156E E89346FFFF          <1> 	call	allocate_memory_block
 15680 00011573 721D                <1> 	jc	short sysalloc_err
 15681                              <1> 	; 01/09/2017
 15682 00011575 29C2                <1> 	sub	edx, eax ; upper limit address - beginning address
 15683 00011577 760F                <1> 	jna	short sysalloc_3 ; begin addr not less than the limit
 15684 00011579 39CA                <1> 	cmp	edx, ecx
 15685 0001157B 720B                <1> 	jb	short sysalloc_3 ; end address overs the limit
 15686                              <1> sysalloc_2:	
 15687                              <1> 	; EAX = Beginning (physical) addr of the allocated mem block
 15688                              <1> 	; ECX = Num of allocated bytes (rounded up to page borders) 
 15689 0001157D 50                  <1> 	push	eax ; * ; 04/03/2017	
 15690                              <1> 	; Here, requested contiquous memory pages have been allocated
 15691                              <1> 	; on Memory Allocation Table but user's page directory 
 15692                              <1> 	; and page tables have not been updated yet!
 15693 0001157E 51                  <1> 	push	ecx ; **
 15694                              <1> 	; ebx = virtual address (will be rounded up to page border)
 15695                              <1> 	; ecx = number of bytes to be deallocated
 15696                              <1> 	;	will be adjusted to ebx+ecx round down - ebx round up
 15697 0001157F E8E049FFFF          <1> 	call	deallocate_user_pages 
 15698 00011584 731F                <1> 	jnc	short sysalloc_4 ; EAX = Deallocated memory bytes
 15699 00011586 59                  <1> 	pop	ecx ; **
 15700 00011587 58                  <1> 	pop	eax ; *
 15701                              <1> sysalloc_3:
 15702                              <1> 	; error !
 15703                              <1> 	; restore Memory Allocation Table Content
 15704 00011588 E89948FFFF          <1> 	call	deallocate_memory_block
 15705 0001158D 31C0                <1> 	xor	eax, eax ; 0
 15706 0001158F 48                  <1> 	dec	eax ; 0FFFFFFFFh ; 15/05/2017
 15707 00011590 EB09                <1> 	jmp	short sysalloc_wrong
 15708                              <1> sysalloc_err:
 15709 00011592 8B2D[18010300]      <1> 	mov	ebp, [u.usp]  ; ebp points to user's registers
 15710 00011598 894D18              <1> 	mov	[ebp+24], ecx ; return to user with ecx value 
 15711                              <1> sysalloc_wrong:
 15712                              <1> 	; eax = 0FFFFFFFFh
 15713 0001159B A3[1C010300]        <1> 	mov	[u.r0], eax
 15714 000115A0 E9AAB7FFFF          <1> 	jmp	error
 15715                              <1> sysalloc_4:
 15716 000115A5 8B2D[18010300]      <1> 	mov	ebp, [u.usp]  ; ebp points to user's registers
 15717 000115AB 894518              <1> 	mov	[ebp+24], eax ; return to user with ecx value 
 15718 000115AE 895D10              <1> 	mov	[ebp+16], ebx ; new value of ebx (rounded up)
 15719 000115B1 89C1                <1> 	mov	ecx, eax ; byte count (from 'deallocate_user_pages')
 15720 000115B3 5A                  <1> 	pop	edx ; ** ; discard (another) byte count
 15721 000115B4 58                  <1> 	pop	eax ; *
 15722 000115B5 A3[1C010300]        <1> 	mov	[u.r0], eax ; physical address
 15723                              <1> 	
 15724 000115BA 51                  <1> 	push	ecx ; 20/08/2017
 15725                              <1> 	;
 15726                              <1> 	; Write newly allocated contiguous (physical) pages
 15727                              <1> 	; on page dir and page tables of current user/process	
 15728                              <1> 	; as PRESENT, USER, WRITABLE
 15729                              <1> 	; (then clear allocated pages)
 15730 000115BB E88C4AFFFF          <1> 	call	allocate_user_pages
 15731                              <1> 	;jnc	sysret ; OK! return to process with success...
 15732                              <1> 
 15733                              <1> 	; 20/08/2017 ('sysdma' modification)
 15734 000115C0 59                  <1> 	pop	ecx
 15735 000115C1 A1[1C010300]        <1> 	mov	eax, [u.r0]   ; physical address (of the block)
 15736                              <1> 
 15737 000115C6 7219                <1> 	jc	short sysalloc_6
 15738                              <1> 
 15739 000115C8 833D[B48D0100]FF    <1> 	cmp	dword [dma_addr], 0FFFFFFFFh ; -1	
 15740                              <1> 	;jb	sysret
 15741                              <1> 	; 23/07/2022
 15742 000115CF 720B                <1> 	jb	short sysalloc_5 ; jmp sysret
 15743                              <1> 
 15744 000115D1 A3[B48D0100]        <1> 	mov	[dma_addr], eax ; save dma address for sysdma
 15745 000115D6 890D[B88D0100]      <1> 	mov	[dma_size], ecx ; save dma buff size for sysdma
 15746                              <1> sysalloc_5:
 15747 000115DC E98EB7FFFF          <1> 	jmp	sysret
 15748                              <1> 		
 15749                              <1> sysalloc_6:
 15750                              <1> 	;
 15751                              <1> 	; unexpected error ! insufficient memory !? conflict !?
 15752                              <1> 	; (!!?there is not a free page for a new page table?!!)
 15753                              <1> 	; We need to terminate process with error message !!!  
 15754                              <1> 	;
 15755 000115E1 8B2D[18010300]      <1> 	mov	ebp, [u.usp]  ; ebp points to user's registers
 15756 000115E7 8B4D18              <1> 	mov	ecx, [ebp+24] ; byte count
 15757                              <1> 	
 15758                              <1> 	; 20/08/2017
 15759                              <1> 	;mov	eax, [u.r0]   ; physical address (of the block)
 15760                              <1> 	
 15761                              <1> 	;
 15762                              <1> 	; restore Memory Allocation Table Content
 15763 000115EA E83748FFFF          <1> 	call	deallocate_memory_block
 15764                              <1> 	;
 15765 000115EF 803D[1E670000]03    <1> 	cmp	byte [CRT_MODE], 3 ; 80x25 text mode?
 15766 000115F6 7407                <1> 	je	short sysalloc_7 ; yes
 15767                              <1> 	; Current mode is VGA (or CGA graphics) mode,
 15768                              <1> 	; We need to return to text mode for displaying
 15769                              <1> 	; error message just before 'sysexit'.  
 15770 000115F8 B003                <1> 	mov	al, 3
 15771 000115FA E82005FFFF          <1> 	call	_set_mode
 15772                              <1> sysalloc_7:
 15773 000115FF BE[28330100]        <1> 	mov	esi, beep_Insufficient_Memory ; error message
 15774 00011604 E8A156FFFF          <1> 	call	print_msg ; print/display the message
 15775 00011609 B801000000          <1> 	mov	eax, 1 ; ax=1 is needed for 'sysexit' procedure
 15776 0001160E E999B8FFFF          <1> 	jmp	sysexit ; and terminate the process !
 15777                              <1> 
 15778                              <1> sysdalloc:
 15779                              <1> 	; 19/02/2017 - TRDOS 386 (TRDOS v2.0)
 15780                              <1> 	; (TRDOS 386 feature only!)
 15781                              <1> 	;
 15782                              <1> 	; Deallocate Memory Block/Pages (for user)
 15783                              <1> 	; (Complementary call for sysalloc.)	
 15784                              <1> 	;
 15785                              <1> 	; INPUT ->
 15786                              <1> 	;	EBX = Virtual address (for user)
 15787                              <1> 	;	      (will be rounded up to page border)
 15788                              <1> 	;	ECX = Byte Count
 15789                              <1> 	;	     (will be adjusted to page borders)
 15790                              <1> 	;	If ICX = 0
 15791                              <1> 	;	   nothing to do
 15792                              <1> 	;	If EBX + ECX > User's ESP
 15793                              <1> 	;	   nothing to do		
 15794                              <1> 	; 
 15795                              <1> 	; Note: u.break control may be included in future versions	
 15796                              <1> 	;
 15797                              <1> 	; OUTPUT ->
 15798                              <1> 	;	If CF = 0
 15799                              <1> 	;	   EAX = Deallocated memory bytes
 15800                              <1> 	;	   EBX = Virtual address (as rounded up)	
 15801                              <1> 	;	IF CF = 1
 15802                              <1> 	;	   EAX = 0
 15803                              <1> 	;
 15804                              <1> 	; Note:	Main purpose of this call is to deallocate/release
 15805                              <1> 	;	previously allocated (physically) contiguous memory
 15806                              <1> 	;	pages but beginning (virtual) address may not be
 15807                              <1> 	;	followed by physically contiguous pages. So, this
 15808                              <1> 	;	system call will deallocate user's virtually
 15809                              <1> 	;	contiguous memory pages. Also, there is not any
 15810                              <1> 	;	objections to use this system call without sysalloc
 15811                              <1> 	;	system call; only possible objection is to lost data
 15812                              <1> 	;	within user's memory space, if the beginning address
 15813                              <1> 	;	and size is not proper.
 15814                              <1> 	;
 15815                              <1> 	; Note: Empty page tables will not be deallocated!!!
 15816                              <1> 	;       (they will be deallocated at process termination)
 15817                              <1> 	;
 15818                              <1> 	; Note: When the program terminates itself or when it is 
 15819                              <1> 	;	terminated by operating system kernel, all allocated
 15820                              <1> 	;	memory pages will be deallocated during termination
 15821                              <1> 	;	stage. So, 'sysdalloc' is not necessary except 
 15822                              <1> 	;	forgiving memory block to other programs/processes.
 15823                              <1> 	;	
 15824 00011613 8B15[14010300]      <1> 	mov	edx, [u.sp]
 15825 00011619 8B420C              <1> 	mov	eax, [edx+12] ; user's stack pointer
 15826 0001161C 29C8                <1> 	sub	eax, ecx ; esp - byte count
 15827 0001161E 24FC                <1> 	and	al, 0FCh ; dword alignment
 15828 00011620 39D8                <1> 	cmp	eax, ebx
 15829 00011622 7220                <1> 	jb	short sysdalloc_err ; deallocation overlaps with stack 	
 15830                              <1> 
 15831 00011624 31C0                <1> 	xor	eax, eax
 15832 00011626 21C9                <1> 	and	ecx, ecx
 15833 00011628 7407                <1> 	jz	short sysdalloc_2
 15834                              <1> 	
 15835 0001162A E83549FFFF          <1> 	call	deallocate_user_pages
 15836 0001162F 7213                <1> 	jc	short sysdalloc_err
 15837                              <1> 
 15838                              <1> sysdalloc_2:
 15839 00011631 A3[1C010300]        <1> 	mov	[u.r0], eax
 15840 00011636 8B2D[18010300]      <1> 	mov	ebp, [u.usp]
 15841 0001163C 895D10              <1> 	mov	[ebp+16], ebx ; new value of ebx
 15842 0001163F E92BB7FFFF          <1> 	jmp	sysret
 15843                              <1> 
 15844                              <1> sysdalloc_err:
 15845 00011644 A3[1C010300]        <1> 	mov	[u.r0], eax ; 0
 15846 00011649 E901B7FFFF          <1> 	jmp	error
 15847                              <1> 
 15848                              <1> syscalbac:
 15849                              <1> 	; SYS CALLBACK
 15850                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
 15851                              <1> 	; 03/08/2020
 15852                              <1> 	; 16/04/2017
 15853                              <1> 	; 14/04/2017
 15854                              <1> 	; 13/04/2017
 15855                              <1> 	; 28/02/2017
 15856                              <1> 	; 26/02/2017
 15857                              <1> 	; 24/02/2017
 15858                              <1> 	; 21/02/2017 - TRDOS 386 (TRDOS v2.0)
 15859                              <1> 	; (TRDOS 386 feature only!)
 15860                              <1> 	;
 15861                              <1> 	; Link or unlink IRQ callback service to/from user (ring 3)	
 15862                              <1> 	;
 15863                              <1> 	; INPUT ->
 15864                              <1> 	;	BL = IRQ number (Hardware interrupt request number)
 15865                              <1> 	;	     (0 t0 15 but IRQ 0,1,2,6,8,14,15 are prohibited)
 15866                              <1> 	;	     IRQ numbers 3,4,5,7,9,10,11,12,13 are valid
 15867                              <1> 	;	     (numbers >15 are invalid)
 15868                              <1> 	;
 15869                              <1> 	;	BH = 0 = Unlink IRQ (in BL) from user (ring 3) service
 15870                              <1> 	;	     1 = Link IRQ by using Signal Response Byte method
 15871                              <1> 	;	     2 = Link IRQ by using Callback service method 		
 15872                              <1> 	;	     3 = Link IRQ by using Auto Increment S.R.B. method 	
 15873                              <1> 	;	    >3 = invalid 
 15874                              <1> 	;	
 15875                              <1> 	;	CL = Signal Return/Response Byte value 
 15876                              <1> 	;
 15877                              <1> 	;	If BH = 3, kernel will put a counter value  ; 03/08/2020
 15878                              <1> 	;	          (into the S.R.B. addr)
 15879                              <1> 	;		  between 0 to 255. (start value = CL+1)
 15880                              <1> 	;	
 15881                              <1> 	;	NOTE: counter value, for example: even and odd numbers
 15882                              <1> 	;	      may be used for -audio- DMA buffer switch 
 15883                              <1> 	;	      within double buffer method, etc. 		
 15884                              <1> 	;
 15885                              <1> 	;	EDX = Signal return (Response) byte address
 15886                              <1> 	;	       		  - or -
 15887                              <1> 	;	      Interrupt/Callback service/routine address
 15888                              <1> 	; 	
 15889                              <1> 	;	      (virtual address in user's memory space)
 15890                              <1> 	;
 15891                              <1> 	; OUTPUT ->
 15892                              <1> 	;	CF = 0 & EAX = 0 -> Successful setting
 15893                              <1> 	;	CF = 1 & EAX > 0 -> IRQ is prohibited or locked 
 15894                              <1> 	;			by another process
 15895                              <1> 	;		 eax = ERR_PERM_DENIED -> prohibited or locked
 15896                              <1> 	;		 eax = ERR_INV_PARAMETER -> 
 15897                              <1> 	;		       invalid parameter/option or bad address
 15898                              <1> 	;
 15899                              <1> 	;	NOTE: Timer callbacks are set by using 'systimer'
 15900                              <1> 	;	      system call (IRQ 0, PIT and IRQ 8, RTC)
 15901                              <1> 	;
 15902                              <1> 	;	      Direct keyboard access is performed by using
 15903                              <1> 	;	      Keyboard Interrupt (INT 32h)	 	
 15904                              <1> 	;	
 15905                              <1> 	;	      It is prohibited here because:
 15906                              <1> 	;		1) Signal Response Byte method has not advantage
 15907                              <1> 	;		   against INT 32h, function AH = 1. Also,
 15908                              <1> 	;		   keyboard service interrupt will return with
 15909                              <1> 	;		   ascii and scan codes (AL, AH) while
 15910                              <1> 	;		   SRB method has only 1 byte space for ascii code
 15911                              <1> 	;		   or scan code. One byte signal response is used 
 15912                              <1> 	;		   for ensuring very simple and very fast
 15913                              <1> 	;		   virtual to physical memory address conversion
 15914                              <1> 	;		   without any memory page crossover risk. 
 15915                              <1> 	;		   (Otherwise double page conversion or word 
 15916                              <1> 	;		   alignment would be needed.)
 15917                              <1> 	;		2) Badly written user code (callback code)
 15918                              <1> 	;		   can prevent keyboard and timesharing functions
 15919                              <1> 	;		   of the operating system via continuous and long
 15920                              <1> 	;		   keyboard event handling by callback service.
 15921                              <1> 	;		   (It can cause to lose immediate keystroke 
 15922                              <1> 	;		   response from hardware to user.)
 15923                              <1> 	;		3) If user will check any keyboard events, 'getkey'
 15924                              <1> 	;		   (or 'getchar') must have more priority than other
 15925                              <1> 	;		   (video etc.) events because only control ability
 15926                              <1> 	;		   on a procedural infinite loop is a keyboard or
 15927                              <1> 	;		   mouse event. So user can use keyboard function
 15928                              <1> 	;		   at the end or at the beginning of a loop.
 15929                              <1> 	;		   In this case, INT 32h is used for that purpose
 15930                              <1> 	;		   and timer interrupt etc. callbacks can be used
 15931                              <1> 	;		   for dynamic and synchronized data refresh/transfer
 15932                              <1> 	;		   while cpu is in a static loop (without polling).
 15933                              <1> 	;		   Keyboard Int callback is not more useful because 
 15934                              <1> 	;		   already a manual check (a key is pressed or not)
 15935                              <1> 	;		   can be performed (via INT 32h, AH = 1) efficiently
 15936                              <1> 	;		   in a loop to prevent a locked infinitive loop.
 15937                              <1> 	;
 15938                              <1> 	;	    Disk IRQs (6,14,15) have been phohibited from ring 3 
 15939                              <1> 	;	    callback because, disk operations (file system services
 15940                              <1> 	;	    etc.) are independent from user program, for fast disk r/w.
 15941                              <1> 	;	    They are not more useful at ring 3 while they are in use
 15942                              <1> 	;	    by standard diskio functions which are mandatory part of 
 15943                              <1> 	;	    (monolithic) OS kernel and mainprog command interpreter.
 15944                              <1> 	;	    INT 33h diskio functions are enough for user level disk
 15945                              <1> 	;	    r/w.				
 15946                              <1> 	;
 15947                              <1> 	; TRDOS 386 - IRQ CALLBACK structures (parameters):
 15948                              <1> 	;	
 15949                              <1> 	;	   [u.irqlock] = 1 word, IRQ flags (0-15) that indicates
 15950                              <1> 	;			which IRQs are locked by (that) user.
 15951                              <1> 	;		        Lock and unlock (by user) will change
 15952                              <1> 	;			these flags or 'terminate process' (sysexit)
 15953                              <1> 	;			will clear these flags and unlock those IRQs.
 15954                              <1> 	;			               
 15955                              <1> 	;		   	Bit 0 is for IRQ 0 and Bit 15 is for IRQ 15
 15956                              <1> 	;
 15957                              <1> 	;	   IRQ(x).owner	 : 1 byte, user, [u.uno], 0 = free (unlocked)	
 15958                              <1> 	;
 15959                              <1> 	;	   IRQ(x).method : 1 byte for callback method & status
 15960                              <1> 	;			   0 = Signal Response Byte method
 15961                              <1> 	;			   1 = Callback service method
 15962                              <1> 	;			   >1 = invalid for current 'syscalback'.
 15963                              <1> 	;			or(+) 80h = IRQ is in use by system (ring 0)
 15964                              <1> 	;			            function (audio etc.) or
 15965                              <1> 	;			   	    a device driver.	   	
 15966                              <1> 	;			(system function will ignore the lock/owner)
 15967                              <1> 	;
 15968                              <1> 	;	   IRQ(x).srb	: 1 byte, Signal Return/Response byte value
 15969                              <1> 	;			  (a fixed value by user or a counter value
 15970                              <1> 	;			 from 0 to 255, which is increased by every
 15971                              <1> 	;			 interrupt just before putting it into 
 15972                              <1> 	;			 the Signal Response byte address
 15973                              <1> 	;			 (This is not used in callback serv method)
 15974                              <1> 	;	    	  
 15975                              <1> 	;	   IRQ(x).addr	: 1 dword
 15976                              <1> 	;			  Signal Response Byte address (physical)
 15977                              <1> 	;			  		-or-
 15978                              <1> 	;			  Callback service address (virtual)
 15979                              <1> 	;
 15980                              <1> 	;	   IRQ(x).dev	: 1 byte
 15981                              <1> 	;			  0 = Default device or kernel function
 15982                              <1> 	;			  		-or-
 15983                              <1> 	;			  1-255 = Assigned device driver number
 15984                              <1> 	;
 15985                              <1> 	;	   (x) = 3,4,5,7,9,10,11,12,13
 15986                              <1> 	;
 15987                              <1> 	;	
 15988                              <1> 	;	NOTE: If user's process/program calls the kernel (INT 40h)
 15989                              <1> 	;	      while it is already running in a (ring 3) callback
 15990                              <1> 	;	      service, kernel will force (convert) system call to
 15991                              <1> 	;	      'sysrele' (sys release). So, this feature provides
 15992                              <1> 	;	      easy and simple usage of callback services without
 15993                              <1> 	;	      falling into deepless <please 'callback me' then 
 15994                              <1> 	;	      let me 'callback you'> cycles! (User must return
 15995                              <1> 	;	      from callback service by using 'sysrele' system
 15996                              <1> 	;	      call, without a significant delay. Otherwise user
 15997                              <1> 	;	      process/program may be late to catch the next event
 15998                              <1> 	;	      within same callback purpose.	    		 	
 15999                              <1> 	;
 16000                              <1> 
 16001 0001164E 30C0                <1> 	xor	al, al ; the caller is 'syscalbac' sign/flag
 16002 00011650 E86B150000          <1>  	call	set_irq_callback_service
 16003                              <1> 	; 16/04/2017
 16004 00011655 A3[1C010300]        <1> 	mov	[u.r0], eax
 16005                              <1> 	;jnc	sysret
 16006                              <1> 	; 23/07/2022
 16007 0001165A 7205                <1> 	jc	short syscalbac_err
 16008 0001165C E90EB7FFFF          <1> 	jmp	sysret
 16009                              <1> syscalbac_err:
 16010 00011661 A3[84010300]        <1> 	mov	dword [u.error], eax
 16011 00011666 E9E4B6FFFF          <1> 	jmp	error
 16012                              <1> 
 16013                              <1> sysfpstat:
 16014                              <1> 	; 28/02/2017 - TRDOS 386 (TRDOS v2.0)
 16015                              <1> 	; (TRDOS 386 feature only!)
 16016                              <1> 	;
 16017                              <1> 	; Set or reset FPU registers save/restore option (for user)
 16018                              <1> 	;	       (during software task switching, wswap-rswap)
 16019                              <1> 	;
 16020                              <1> 	; INPUT ->
 16021                              <1> 	;	BL = 0 -> reset
 16022                              <1> 	;	BL = 1 -> set (FPU register will be saved and restored)
 16023                              <1> 	;	
 16024                              <1> 	; OUTPUT ->
 16025                              <1> 	;	cf = 0 -> no error, FPU is ready... 
 16026                              <1> 	;		  (EAX = 0)
 16027                              <1> 	;	Cf = 1 -> error, 80387 FPU is not ready !
 16028                              <1> 	;		  (EAX = 0FFFFFFFFh)
 16029                              <1> 
 16030 0001166B 31C0                <1> 	xor	eax, eax
 16031 0001166D 803D[00840100]00    <1> 	cmp	byte [fpready], 0
 16032 00011674 7613                <1> 	jna	short sysfpstat_err	
 16033                              <1> 
 16034 00011676 80E301              <1> 	and	bl, 1 ; use BIT 0 only !
 16035 00011679 881D[97010300]      <1> 	mov	[u.fpsave], bl
 16036 0001167F A3[1C010300]        <1> 	mov	[u.r0], eax ; 0
 16037 00011684 E9E6B6FFFF          <1> 	jmp	sysret	 	
 16038                              <1> 
 16039                              <1> sysfpstat_err:
 16040 00011689 48                  <1> 	dec 	eax ; 0FFFFFFFFh
 16041 0001168A A3[1C010300]        <1> 	mov 	[u.r0], eax ; -1
 16042 0001168F E9BBB6FFFF          <1> 	jmp 	error
 16043                              <1> 
 16044                              <1> sysdelete: ; Delete (Remove, Unlink) File
 16045                              <1> 	; 29/12/2017 (TRDOS 386 = TRDOS v2.0) 
 16046                              <1> 	;	
 16047                              <1>         ; INPUT ->
 16048                              <1>         ;          EBX = File name (ASCIIZ string) address
 16049                              <1> 	; OUTPUT ->
 16050                              <1> 	;          cf = 0 -> eax = 0
 16051                              <1> 	;          cf = 1 -> Error code in AL
 16052                              <1> 	;
 16053                              <1> 	; Modified Registers: EAX (at the return of system call)
 16054                              <1> 	;   
 16055                              <1> 
 16056 00011694 89DE                <1> 	mov	esi, ebx
 16057                              <1> 	; file name is forced, change directory as temporary
 16058                              <1> 	;mov	ax, 1
 16059                              <1> 	;mov	[FFF_Valid], ah ; 0 ; reset
 16060                              <1> 	;call	set_working_path 
 16061 00011696 E8D2090000          <1> 	call	set_working_path_x
 16062 0001169B 731D                <1> 	jnc	short sysdelete_1
 16063                              <1> 
 16064 0001169D 21C0                <1> 	and	eax, eax  ; 0 -> Bad Path!  
 16065 0001169F 7505                <1> 	jnz	short sysdelete_err
 16066                              <1> 	; eax = 0
 16067                              <1> sysdelete_path_err:
 16068 000116A1 B813000000          <1> 	mov	eax, ERR_INV_PATH_NAME ; 'bad path name !'
 16069                              <1> sysdelete_err:
 16070 000116A6 A3[1C010300]        <1> 	mov	[u.r0], eax
 16071 000116AB A3[84010300]        <1> 	mov	[u.error], eax
 16072 000116B0 E88D0A0000          <1> 	call 	reset_working_path
 16073 000116B5 E995B6FFFF          <1> 	jmp	error
 16074                              <1> sysdelete_1:
 16075                              <1> 	;mov	esi, FindFile_Name
 16076 000116BA 66B80018            <1> 	mov	ax, 1800h ; Only files
 16077 000116BE E8CD73FFFF          <1> 	call	find_first_file
 16078 000116C3 72E1                <1> 	jc	short sysdelete_err
 16079                              <1> sysdelete_2:
 16080                              <1> 	; check file attributes
 16081                              <1> 
 16082                              <1> 	;test	bl, 17 ; system, hidden, readonly, directory
 16083 000116C5 F6C307              <1>         test	bl, 7 ; system, hidden, readonly 
 16084 000116C8 7407                <1>         jz	short sysdelete_3
 16085                              <1> 
 16086 000116CA B80B000000          <1>         mov	eax, ERR_FILE_ACCESS ; 11 = 'permission denied !'
 16087 000116CF EBD5                <1>         jmp	short sysdelete_err
 16088                              <1> sysdelete_3:
 16089 000116D1 6621D2              <1> 	and	dx, dx ; Ambiguous filename chars used sign (DX>0)
 16090 000116D4 7407                <1> 	jz	short sysdelete_4
 16091 000116D6 B81A000000          <1> 	mov	eax, ERR_INV_FILE_NAME ; 26 = 'invalid file name !'
 16092 000116DB EBC9                <1>         jmp	short sysdelete_err
 16093                              <1> sysdelete_4:
 16094                              <1> 	;mov	bh, [LongName_EntryLength]
 16095 000116DD 883D[72810100]      <1> 	mov	[DelFile_LNEL], bh ; Long name entry length (if > 0)
 16096                              <1> 	; edi = Directory Entry Offset (DirBuff)
 16097                              <1> 	; esi = Directory Entry (FFF Structure)
 16098 000116E3 E8D99BFFFF          <1> 	call	remove_file
 16099 000116E8 72BC                <1> 	jc	short sysdelete_err
 16100                              <1> sysrmdir_5:
 16101 000116EA 31C0                <1> 	xor	eax, eax ; 0
 16102 000116EC A3[1C010300]        <1> 	mov	[u.r0], eax
 16103                              <1> 	;mov	[u.error], eax
 16104 000116F1 E84C0A0000          <1> 	call 	reset_working_path
 16105 000116F6 E974B6FFFF          <1> 	jmp	sysret
 16106                              <1> 
 16107                              <1> 
 16108                              <1> sysrmdir: ; Remove (Unlink) Directory
 16109                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
 16110                              <1> 	; 19/01/2021
 16111                              <1> 	; 29/12/2017 (TRDOS 386 = TRDOS v2.0) 
 16112                              <1> 	;	
 16113                              <1>         ; INPUT ->
 16114                              <1>         ;          EBX = Pointer to directory name
 16115                              <1> 	; OUTPUT ->
 16116                              <1> 	;          cf = 0 -> eax = 0
 16117                              <1> 	;          cf = 1 -> Error code in AL
 16118                              <1> 	;
 16119                              <1> 	; Modified Registers: EAX (at the return of system call)
 16120                              <1> 	;  
 16121                              <1> 
 16122                              <1> 	; 19/01/2021
 16123 000116FB 803D[6E010300]00    <1> 	cmp	byte [u.uid], 0  ; root (super user) ?
 16124 00011702 7614                <1> 	jna	short sysrmdir_0
 16125                              <1> 
 16126                              <1> 	;mov	dword [u.r0], ERR_PERM_DENIED
 16127 00011704 B80B000000          <1> 	mov	eax, ERR_PERM_DENIED ; ERR_NOT_SUPERUSER
 16128 00011709 A3[1C010300]        <1> 	mov	[u.r0], eax
 16129 0001170E A3[84010300]        <1> 	mov	[u.error], eax
 16130 00011713 E937B6FFFF          <1> 	jmp	error
 16131                              <1> 
 16132                              <1> sysrmdir_0:
 16133 00011718 89DE                <1> 	mov	esi, ebx
 16134                              <1> 	; file name is forced, change directory as temporary
 16135                              <1> 	;mov	ax, 1
 16136                              <1> 	;mov	[FFF_Valid], ah ; 0 ; reset
 16137                              <1> 	;call	set_working_path 
 16138 0001171A E84E090000          <1> 	call	set_working_path_x
 16139 0001171F 7308                <1> 	jnc	short sysrmdir_1
 16140                              <1> 
 16141 00011721 21C0                <1> 	and	eax, eax  ; 0 -> Bad Path!  
 16142 00011723 7513                <1> 	jnz	short sysrmdir_err
 16143                              <1> 	; eax = 0
 16144                              <1> sysrmdir_not_found:
 16145                              <1> 	;mov	eax, ERR_DIR_NOT_FOUND ; Directory not found !
 16146                              <1> 	; 23/07/2022
 16147 00011725 B00C                <1> 	mov	al, ERR_DIR_NOT_FOUND
 16148 00011727 EB0F                <1> 	jmp	short sysrmdir_err
 16149                              <1> ;sysrmdir_err:
 16150                              <1> ;	mov	[u.r0], eax
 16151                              <1> ;	mov	[u.error], eax
 16152                              <1> ;	call 	reset_working_path
 16153                              <1> ;	jmp	error
 16154                              <1> sysrmdir_1:
 16155                              <1> 	;mov	esi, FindFile_Name
 16156 00011729 66B81008            <1> 	mov	ax, 0810h ; Only directories
 16157 0001172D E85E73FFFF          <1> 	call	find_first_file
 16158 00011732 7318                <1> 	jnc	short sysrmdir_2
 16159                              <1> 
 16160                              <1> 	; eax = 2 (File not found !)
 16161 00011734 3C02                <1> 	cmp	al, 2 ; ERR_NOT_FOUND
 16162 00011736 74ED                <1> 	je	short sysrmdir_not_found
 16163                              <1> 	;jmp	short sysrmdir_err
 16164                              <1> 	; 23/07/2022
 16165                              <1> sysrmdir_err:
 16166 00011738 A3[1C010300]        <1> 	mov	[u.r0], eax
 16167 0001173D A3[84010300]        <1> 	mov	[u.error], eax
 16168                              <1> sysrmdir_8:	; 23/07/2022
 16169 00011742 E8FB090000          <1> 	call 	reset_working_path
 16170 00011747 E903B6FFFF          <1> 	jmp	error
 16171                              <1> sysrmdir_2:
 16172                              <1> 	; check directory attributes
 16173                              <1> 
 16174 0001174C F6C307              <1>         test	bl, 7 ; system, hidden, readonly 
 16175 0001174F 7407                <1>         jz	short sysrmdir_3
 16176                              <1> 
 16177 00011751 B80B000000          <1>         mov	eax, ERR_DIR_ACCESS ; 11 = 'permission denied !'
 16178 00011756 EBE0                <1>         jmp	short sysrmdir_err
 16179                              <1> sysrmdir_3:
 16180 00011758 6621D2              <1> 	and	dx, dx ; Ambiguous filename chars used sign (DX>0)
 16181 0001175B 7407                <1> 	jz	short sysrmdir_4
 16182                              <1> 	;mov	eax, ERR_NOT_DIR ; 'not a valid directory !'
 16183 0001175D B813000000          <1> 	mov	eax, ERR_INV_PATH_NAME ; 'bad path name !'
 16184 00011762 EBD4                <1>         jmp	short sysrmdir_err
 16185                              <1> sysrmdir_4:
 16186                              <1> 	;mov	bh, [LongName_EntryLength]
 16187 00011764 883D[72810100]      <1> 	mov	[DelFile_LNEL], bh ; Long name entry length (if > 0)
 16188                              <1> 	; edi = Directory Entry Offset (DirBuff)
 16189                              <1> 	; esi = Directory Entry (FFF Structure)
 16190 0001176A E8C179FFFF          <1> 	call	delete_sub_directory
 16191                              <1> 	;jnc	sysrmdir_5
 16192                              <1> 	; 23/07/2022
 16193 0001176F 7205                <1> 	jc	short sysrmdir_6
 16194 00011771 E974FFFFFF          <1> 	jmp	sysrmdir_5
 16195                              <1> 
 16196                              <1> ;	jc	short sysrmdir_6
 16197                              <1> ;
 16198                              <1> ;	xor	eax, eax ; 0
 16199                              <1> ;sysrmdir_5:
 16200                              <1> ;	mov	[u.r0], eax
 16201                              <1> ;	;mov	[u.error], eax
 16202                              <1> ;	call 	reset_working_path
 16203                              <1> ;	jmp	sysret
 16204                              <1> 
 16205                              <1> sysrmdir_6:
 16206 00011776 A3[1C010300]        <1> 	mov	[u.r0], eax
 16207 0001177B A3[84010300]        <1> 	mov	[u.error], eax
 16208                              <1> 
 16209 00011780 09C0                <1> 	or	eax, eax ; EAX = 0 -> Directory not empty!
 16210 00011782 7414                <1> 	jz	short sysrmdir_9
 16211                              <1> 
 16212                              <1> 	; EAX > 0 -> Error code in AL (or AX or EAX)
 16213                              <1> 
 16214 00011784 833D[267F0100]01    <1> 	cmp	dword [FAT_ClusterCounter], 1
 16215 0001178B 72B5                <1> 	jb	short sysrmdir_8
 16216                              <1> sysrmdir_7:
 16217                              <1> 	; ESI = Logical DOS Drive Description Table address	
 16218 0001178D 66BB00FF            <1> 	mov	bx, 0FF00h ; BH = FFh -> use ESI for Drive parameters
 16219                              <1> 	           ; BL = 0 -> Recalculate free cluster count
 16220 00011791 E874B0FFFF          <1> 	call	calculate_fat_freespace	
 16221                              <1> 	; 23/07/2022
 16222 00011796 EBAA                <1> 	jmp	short sysrmdir_8
 16223                              <1> ;sysrmdir_8:
 16224                              <1> ;	call 	reset_working_path
 16225                              <1> ;	jmp	error
 16226                              <1> 
 16227                              <1> sysrmdir_9:
 16228 00011798 A1[267F0100]        <1> 	mov	eax, [FAT_ClusterCounter]
 16229 0001179D 09C0                <1> 	or	eax, eax ; 0 ?
 16230                              <1> 	;jz	short sysrmdir_err
 16231                              <1> 	; 23/07/2022
 16232 0001179F 74A1                <1> 	jz	short sysrmdir_8
 16233                              <1> 
 16234                              <1> 	; ESI = Logical DOS Drive Description Table address	
 16235 000117A1 66BB01FF            <1> 	mov	bx, 0FF01h ; BH = FFh -> use ESI for Drive parameters
 16236                              <1> 	           ; BL = 1 -> add free clusters
 16237 000117A5 E860B0FFFF          <1> 	call	calculate_fat_freespace
 16238 000117AA 09C9                <1> 	or	ecx, ecx
 16239 000117AC 7494                <1>         jz	short sysrmdir_8 ; ecx = 0 -> OK
 16240                              <1> 	; ecx > 0 -> Error (Recalculation is needed)
 16241 000117AE EBDD                <1> 	jmp	short sysrmdir_7
 16242                              <1> 
 16243                              <1> 
 16244                              <1> syschdir: ; Change Current (Working) Drive & Directory (for user)
 16245                              <1> 	; 30/12/2017 (TRDOS 386 = TRDOS v2.0) 
 16246                              <1> 	;	
 16247                              <1>         ; INPUT ->
 16248                              <1>         ;          EBX = Directory name (ASCIIZ string) address
 16249                              <1> 	; OUTPUT ->
 16250                              <1> 	;          cf = 0 -> eax = 0
 16251                              <1> 	;          cf = 1 -> Error code in AL
 16252                              <1> 	;
 16253                              <1> 	; Modified Registers: EAX (at the return of system call)
 16254                              <1> 	;
 16255                              <1> 	; NOTE: If drive name is not included, only the working
 16256                              <1> 	; directory (for user, not for drive/OS) will be chanded.
 16257                              <1> 	; If there is a drive name (as A:, B:, C:, D: etc.)
 16258                              <1> 	; at the beginning of the ASCIIZ (directory) string,
 16259                              <1> 	; working drive and working directory (for user) 
 16260                              <1> 	; will be changed together.
 16261                              <1> 	; (When the program is terminated, MainProg -internal 
 16262                              <1> 	; shell- will reset working directory to the previous
 16263                              <1> 	; -current- logical drive's current directory again.) 	
 16264                              <1>   
 16265 000117B0 89DE                <1> 	mov	esi, ebx
 16266                              <1> 	; file name is not forced, change directory as temporary
 16267 000117B2 31C0                <1> 	xor	eax, eax
 16268                              <1> 	;mov	[FFF_Valid], ah ; 0 ; reset
 16269                              <1> 	;call	set_working_path 
 16270 000117B4 E8B8080000          <1> 	call	set_working_path_xx
 16271 000117B9 731D                <1> 	jnc	short syschdir_ok
 16272 000117BB 21C0                <1> 	and	eax, eax  ; 0 -> Bad Path!  
 16273 000117BD 7505                <1> 	jnz	short syschdir_err
 16274                              <1> 	; eax = 0
 16275                              <1> syschdir_not_found:
 16276 000117BF B80C000000          <1> 	mov	eax, ERR_DIR_NOT_FOUND ; Directory not found !
 16277                              <1> syschdir_err:
 16278 000117C4 A3[1C010300]        <1> 	mov	[u.r0], eax
 16279 000117C9 A3[84010300]        <1> 	mov	[u.error], eax
 16280 000117CE E86F090000          <1> 	call 	reset_working_path
 16281 000117D3 E977B5FFFF          <1> 	jmp	error
 16282                              <1> syschdir_ok:
 16283 000117D8 31C0                <1> 	xor	eax, eax ; 0
 16284 000117DA A3[1C010300]        <1> 	mov	[u.r0], eax
 16285                              <1> 	;mov	[u.error], eax
 16286 000117DF E98BB5FFFF          <1> 	jmp	sysret
 16287                              <1> 
 16288                              <1> 
 16289                              <1> syschmod: ; Get & Change File (or Directory) Attributes
 16290                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
 16291                              <1> 	; 19/01/2021
 16292                              <1> 	; 30/12/2017 (TRDOS 386 = TRDOS v2.0) 
 16293                              <1> 	;	
 16294                              <1>         ; INPUT ->
 16295                              <1>         ;          EBX = File/Directory (ASCIIZ) name address
 16296                              <1> 	;	    CL = New attributes (if CL < 40h)
 16297                              <1> 	;	    CL >= 40h -> Get File Attributes		
 16298                              <1> 	; OUTPUT ->
 16299                              <1> 	;          cf = 0 -> EAX = File attributes (in AL)
 16300                              <1> 	;          cf = 1 -> Error code in AL
 16301                              <1> 	;
 16302                              <1> 	; Modified Registers: EAX (at the return of system call)
 16303                              <1> 	;  
 16304                              <1> 	; MSDOS File Attributes:    (bit value of attrib byte)
 16305                              <1> 	;	ATTR_READ_ONLY	=	01h  (bit 0, 'R')
 16306                              <1> 	;	ATTR_HIDDEN	=	02h  (bit 1, 'H')
 16307                              <1> 	;	ATTR_SYSTEM	=	04h  (bit 2, 'S')
 16308                              <1> 	;	ATTR_VOLUME_ID	=	08h  (bit 3)
 16309                              <1> 	;	ATTR_DIRECTORY	=	10h  (bit 4)
 16310                              <1> 	;	ATTR_ARCHIVE	=	20h  (bit 5, 'A')
 16311                              <1> 	;	ATTR_LONG_NAME	=	ATTR_READONLY |
 16312                              <1> 	;				ATTR_HIDDEN |
 16313                              <1> 	;				ATTR_SYSTEM |
 16314                              <1> 	;				ATTR_VOLUME_ID				
 16315                              <1> 	;	The upper two bits of attributes must be 0.
 16316                              <1> 
 16317                              <1> 	; Note:	* If ATTR_DIRECTORY is set, only directory names
 16318                              <1> 	;	  will be searched (and S,H,R,A attributeds of 
 16319                              <1> 	;	  the directory will be changed.)
 16320                              <1> 	;	* If ATTR_VOLUME_ID is set, 'syschmod' system call
 16321                              <1> 	;	  will return with 'permission denied' error.
 16322                              <1> 	;	* If ATTR_DIRECTORY is not set, only file names
 16323                              <1> 	;	  will be searched (and S,H,R,A attributes of the
 16324                              <1> 	;	  file will be changed.)
 16325                              <1> 	;
 16326                              <1> 	; (Ony Super User can change S,H,R attributes.) 
 16327                              <1> 
 16328 000117E4 80F940              <1> 	cmp	cl, 40h	
 16329 000117E7 7327                <1> 	jnb	short syschmod_0
 16330                              <1> 
 16331 000117E9 F6C108              <1> 	test	cl, 08h ; ATTR_VOLUME_ID
 16332 000117EC 750E                <1> 	jnz	short syschmod_perm_err
 16333                              <1> 
 16334                              <1> 	; 19/01/2021
 16335 000117EE 803D[6E010300]00    <1> 	cmp	byte [u.uid], 0  ; root (super user) ?
 16336 000117F5 7619                <1> 	jna	short syschmod_0
 16337                              <1> 
 16338                              <1> 	; Not super user..
 16339 000117F7 F6C107              <1> 	test	cl, 07h	; S,H,R attributes
 16340 000117FA 7414                <1> 	jz	short syschmod_0
 16341                              <1> 
 16342                              <1> syschmod_perm_err:
 16343                              <1> 	;mov	dword [u.r0], ERR_PERM_DENIED
 16344 000117FC B80B000000          <1> 	mov	eax, ERR_PERM_DENIED ; 'permission denied !'
 16345 00011801 A3[1C010300]        <1> 	mov	[u.r0], eax
 16346 00011806 A3[84010300]        <1> 	mov	[u.error], eax
 16347 0001180B E93FB5FFFF          <1> 	jmp	error
 16348                              <1> 
 16349                              <1> syschmod_0:
 16350 00011810 880D[C0810100]      <1> 	mov	[Attributes], cl
 16351 00011816 89DE                <1> 	mov	esi, ebx
 16352                              <1> 	; file name is forced, change directory as temporary
 16353                              <1> 	;mov	ax, 1
 16354                              <1> 	;mov	[FFF_Valid], ah ; 0 ; reset
 16355                              <1> 	;call	set_working_path 
 16356 00011818 E850080000          <1> 	call	set_working_path_x
 16357 0001181D 7308                <1> 	jnc	short syschmod_1
 16358 0001181F 21C0                <1> 	and	eax, eax  ; 0 -> Bad Path!  
 16359 00011821 751E                <1> 	jnz	short syschmod_err
 16360                              <1> 	; eax = 0
 16361                              <1> syschmod_path_not_found:
 16362                              <1> 	;mov	eax, ERR_INV_PATH_NAME ; 'Bad path name !'
 16363                              <1> 	; 23/07/2022
 16364 00011823 B013                <1> 	mov	al, ERR_INV_PATH_NAME
 16365                              <1> ;syschmod_err:
 16366                              <1> 	;mov	[u.r0], eax
 16367                              <1> 	;mov	[u.error], eax
 16368                              <1> 	;call 	reset_working_path
 16369                              <1> 	;jmp	error
 16370                              <1> 	; 23/07/2022
 16371 00011825 EB1A                <1> 	jmp	short syschmod_err
 16372                              <1> syschmod_1:
 16373 00011827 B008                <1> 	mov	al, 08h ; Except volume labels (& long names)
 16374 00011829 A0[C0810100]        <1> 	mov	al, [Attributes]
 16375 0001182E 2410                <1> 	and	al, 10h ;
 16376                              <1> 	;mov	esi, FindFile_Name
 16377                              <1> 	;mov	ax, 1800h ; Only files
 16378                              <1> 	;mov	ax, 0810h ; Only directories
 16379 00011830 E85B72FFFF          <1> 	call	find_first_file
 16380                              <1> 	;jnc	short syschmod_2
 16381 00011835 720A                <1> 	jc	short syschmod_err
 16382                              <1> 
 16383                              <1> 	;; eax = 2 (File not found !)
 16384                              <1> 	;cmp	al, 2 ; ERR_NOT_FOUND
 16385                              <1> 	;jne	short syschmod_err
 16386                              <1> 
 16387                              <1> 	;and	byte [Attributes], 10h
 16388                              <1> 	;jz	short syschmod_err
 16389                              <1> 
 16390                              <1> 	;; Directory not found !
 16391                              <1> 	;mov	al, 3 ; ERR_PATH_NOT_FOUND
 16392                              <1> 	;jmp	short syschmod_err
 16393                              <1> 
 16394                              <1> syschmod_2:
 16395 00011837 6621D2              <1> 	and	dx, dx ; Ambiguous filename chars used sign (DX>0)
 16396 0001183A 7419                <1> 	jz	short syschmod_3
 16397 0001183C B81A000000          <1> 	mov	eax, ERR_INV_FILE_NAME ; 'invalid file name !'
 16398                              <1>         ;jmp	short syschmod_err
 16399                              <1> syschmod_err:
 16400 00011841 A3[1C010300]        <1> 	mov	[u.r0], eax
 16401 00011846 A3[84010300]        <1> 	mov	[u.error], eax
 16402 0001184B E8F2080000          <1> 	call 	reset_working_path
 16403 00011850 E9FAB4FFFF          <1> 	jmp	error
 16404                              <1> syschmod_3:
 16405                              <1> 	; EDI = Directory buffer entry offset/address
 16406                              <1> 	; BL = File (or Directory) Attributes 
 16407                              <1> 	; mov	bl, [EDI+0Bh]
 16408                              <1> 
 16409                              <1> 	; check directory attributes
 16410 00011855 8A3D[C0810100]      <1> 	mov	bh, [Attributes] ; new attributes
 16411 0001185B 80FF40              <1> 	cmp	bh, 40h  ;>=40 -> get file/directory attributes
 16412 0001185E 732D                <1> 	jnb	short syschmod_6
 16413                              <1> 
 16414                              <1> 	; set file/directory attributes
 16415 00011860 F6C307              <1> 	test	bl, 7 ; system, hidden, readonly 
 16416 00011863 7409                <1>         jz	short syschmod_4
 16417                              <1> 
 16418                              <1> 	; 19/01/2021
 16419 00011865 803D[6E010300]00    <1> 	cmp	byte [u.uid], 0  ; root (super user) ?
 16420 0001186C 778E                <1> 	ja	short syschmod_perm_err
 16421                              <1> syschmod_4:
 16422 0001186E 66817F0CA101        <1> 	cmp	word [edi+DirEntry_NTRes], 01A1h ; Singlix FS
 16423 00011874 7424                <1> 	je	short syschmod_7
 16424                              <1> 
 16425 00011876 887F0B              <1> 	mov	[edi+0Bh], bh    ; Attributes (New!)
 16426                              <1> 
 16427 00011879 C605[317F0100]02    <1> 	mov	byte [DirBuff_ValidData], 2 ; modified sign
 16428                              <1> 					    ; to force write	
 16429 00011880 E80B97FFFF          <1> 	call 	save_directory_buffer
 16430 00011885 72BA                <1> 	jc	short syschmod_err
 16431                              <1> 
 16432                              <1> syschmod_5:
 16433 00011887 8A1D[C0810100]      <1> 	mov	bl, [Attributes]
 16434                              <1> syschmod_6:
 16435 0001188D 0FB6C3              <1> 	movzx	eax, bl
 16436 00011890 A3[1C010300]        <1> 	mov	[u.r0], eax
 16437                              <1> 	;mov	dword [u.error], 0
 16438 00011895 E9D5B4FFFF          <1> 	jmp	sysret
 16439                              <1> 
 16440                              <1> syschmod_7:
 16441 0001189A 29C0                <1> 	sub	eax, eax
 16442 0001189C 8A25[2F7F0100]      <1>         mov     ah, [DirBuff_DRV]
 16443 000118A2 BE00010900          <1> 	mov	esi, Logical_DOSDisks
 16444 000118A7 01C6                <1>         add     esi, eax
 16445 000118A9 807E04A1            <1>         cmp     byte [esi+LD_FSType], 0A1h
 16446 000118AD 7304                <1> 	jnc	short syschmod_8
 16447 000118AF B01D                <1> 	mov	al, ERR_INV_DATA ; 29 = Invalid Data
 16448 000118B1 EB8E                <1> 	jmp	short syschmod_err
 16449                              <1> 
 16450                              <1> syschmod_8:
 16451                              <1> 	; BH = New MS-DOS File Attributes
 16452 000118B3 88F8                <1> 	mov	al, bh ; File/Directory Attributes
 16453 000118B5 30E4                <1> 	xor	ah, ah ; Attributes in MS-DOS format sign	  
 16454 000118B7 E8B682FFFF          <1> 	call	change_fs_file_attributes
 16455                              <1> 	;jc	syschmod_err
 16456                              <1> 	;jmp	short syschmod_5
 16457                              <1> 	; 23/07/2022
 16458 000118BC 73C9                <1> 	jnc	short syschmod_5
 16459 000118BE EB81                <1> 	jmp	short syschmod_err
 16460                              <1> 
 16461                              <1> 
 16462                              <1> sysdrive: ; Get/Set Current (Working) Drive (for user)
 16463                              <1> 	; 30/12/2017 (TRDOS 386 = TRDOS v2.0) 
 16464                              <1> 	;	
 16465                              <1>         ; INPUT ->
 16466                              <1>         ;          BL = Logical DOS Drive number (0=A: ... 2=C:)
 16467                              <1> 	;	   If BL = 0FFh -> Get Current Drive 	
 16468                              <1> 	; OUTPUT ->
 16469                              <1> 	;          cf = 0 -> 
 16470                              <1> 	;		   AL = Current Drive number	
 16471                              <1> 	;		   AH = The Last Logical DOS Drive no.
 16472                              <1> 	;          cf = 1 -> Error code in AL
 16473                              <1> 	;
 16474                              <1> 	; Modified Registers: EAX (at the return of system call)
 16475                              <1> 	;
 16476                              <1> 	; NOTE: If the requested logical dos drive is ready, 
 16477                              <1> 	;	it's current current directory will be the user's
 16478                              <1> 	;	(program's) current directory.
 16479                              <1> 	;	(When the program is terminated, MainProg -internal 
 16480                              <1> 	;	shell- will reset the previous -current- logical drive
 16481                              <1> 	;       as current drive again).	
 16482                              <1>   
 16483 000118C0 80FBFF              <1> 	cmp	bl, 0FFh
 16484 000118C3 7435                <1> 	je	short sysdrive_ok
 16485 000118C5 3A1D[BE2F0100]      <1> 	cmp	bl, [Last_DOS_DiskNo]
 16486 000118CB 771E                <1> 	ja	short sysdrive_err	
 16487                              <1> 
 16488                              <1> 	; Save current drive and reset mode
 16489                              <1> 	; for 'reset_working_path' procedure (for MainProg)
 16490 000118CD 30C0                <1> 	xor	al, al
 16491 000118CF 66A3[FC830100]      <1> 	mov	[SWP_Mode], ax ; ah = 0
 16492 000118D5 A0[0A780100]        <1> 	mov	al, [Current_Drv]
 16493 000118DA FEC4                <1> 	inc	ah ; mov ah, 1
 16494 000118DC 66A3[FE830100]      <1> 	mov	[SWP_DRV], ax 
 16495                              <1> 
 16496 000118E2 88DA                <1> 	mov	dl, bl
 16497 000118E4 E8F95EFFFF          <1> 	call	change_current_drive
 16498 000118E9 730F                <1> 	jnc	short sysdrive_ok
 16499                              <1> sysdrive_err:
 16500 000118EB C705[1C010300]0F00- <1> 	mov	dword [u.r0], ERR_DRV_NOT_RDY ; 'drive not ready !'
 16500 000118F3 0000                <1>
 16501 000118F5 E955B4FFFF          <1> 	jmp	error
 16502                              <1> sysdrive_ok:
 16503 000118FA A0[0A780100]        <1> 	mov	al, [Current_Drv]
 16504 000118FF 8A25[BE2F0100]      <1> 	mov	ah, [Last_DOS_DiskNo]
 16505 00011905 A3[1C010300]        <1> 	mov	[u.r0], eax
 16506 0001190A E960B4FFFF          <1> 	jmp	sysret
 16507                              <1> 
 16508                              <1> 
 16509                              <1> sysdir: ; Get Current (Working) Drive & Directory (for user)
 16510                              <1> 	; 30/12/2017 (TRDOS 386 = TRDOS v2.0) 
 16511                              <1> 	;	
 16512                              <1>         ; INPUT ->
 16513                              <1>         ;          EBX = Current directory name buffer address
 16514                              <1> 	;		(Buffer length = 92 bytes)
 16515                              <1> 	; OUTPUT ->
 16516                              <1> 	;          AL = Current drive (0=A: .. 2=C:)
 16517                              <1> 	;	   If CF = 1 -> AL = error code
 16518                              <1> 	;
 16519                              <1> 	; Modified Registers: EAX (at the return of system call)
 16520                              <1> 	;
 16521                              <1> 	; Note: Required directory name buffer length may be 
 16522                              <1> 	;	<= 92 bytes for current TRDOS 386 version.
 16523                              <1> 	;	(7*12 name chars + 7 slash + 0)
 16524                              <1> 
 16525 0001190F 89E5                <1> 	mov	ebp, esp
 16526 00011911 83EC60              <1> 	sub	esp, 96
 16527 00011914 53                  <1> 	push	ebx ; User's buffer address
 16528 00011915 30D2                <1> 	xor	dl, dl ; 0 = current drive
 16529 00011917 E8F28BFFFF          <1>   	call	get_current_directory
 16530 0001191C 72CD                <1> 	jc	short sysdrive_err ; 'drive not ready !' error
 16531 0001191E 89E6                <1> 	mov	esi, esp ; System's buffer address
 16532 00011920 5F                  <1> 	pop	edi  ; User's buffer address
 16533                              <1> 	; ecx = transfer (byte) count (<=92)
 16534 00011921 E883F4FFFF          <1> 	call	transfer_to_user_buffer
 16535 00011926 89EC                <1> 	mov	esp, ebp
 16536 00011928 730F                <1> 	jnc	short sysdir_ok
 16537                              <1> sysdir_err:
 16538 0001192A C705[1C010300]2E00- <1> 	mov	dword [u.r0], ERR_BUFFER  ; 'buffer error !'
 16538 00011932 0000                <1>
 16539 00011934 E916B4FFFF          <1> 	jmp	error
 16540                              <1> sysdir_ok:	
 16541 00011939 8A0D[0A780100]      <1> 	mov	cl, [Current_Drv]
 16542 0001193F 890D[1C010300]      <1> 	mov	[u.r0], ecx
 16543 00011945 E925B4FFFF          <1> 	jmp	sysret
 16544                              <1> 
 16545                              <1> 
 16546                              <1> sysldrvt: ; Get copy of Logical DOS Drive Description Table
 16547                              <1> 	; 30/12/2017 (TRDOS 386 = TRDOS v2.0) 
 16548                              <1> 	;	
 16549                              <1>         ; INPUT ->
 16550                              <1> 	;	    BL = Logical DOS drive number (zero based)	
 16551                              <1>         ;          ECX = Logical DOS drv desc table buffer addr
 16552                              <1> 	;		(Buffer length = 256 bytes)
 16553                              <1> 	; OUTPUT ->
 16554                              <1> 	;          cf = 0 -> 
 16555                              <1> 	;		   AL = Current Drive number	
 16556                              <1> 	;		   AH = The Last Logical DOS Drive no.
 16557                              <1> 	;          cf = 1 -> Error code in AL
 16558                              <1> 	;		   AH = The Last Logical DOS Drive no.
 16559                              <1> 	;
 16560                              <1> 	; Modified Registers: EAX (at the return of system call)
 16561                              <1> 	;
 16562                              <1> 	; Note: Required description table buffer length is
 16563                              <1> 	;	256 bytes for current TRDOS 386 version.
 16564                              <1> 	
 16565 0001194A 89CF                <1> 	mov	edi, ecx ; Destination address (user space)
 16566 0001194C 88DC                <1> 	mov	ah, bl
 16567 0001194E 30C0                <1> 	xor	al, al
 16568 00011950 BE00010900          <1> 	mov	esi, Logical_DOSDisks
 16569 00011955 01C6                <1> 	add	esi, eax ; Source address (system space)	 
 16570 00011957 B900010000          <1> 	mov	ecx, 256 ; Byte count 
 16571                              <1> 			 ; Logical Dos Drv Desc Table size
 16572 0001195C E848F4FFFF          <1> 	call	transfer_to_user_buffer
 16573 00011961 72C7                <1> 	jc	short sysdir_err
 16574 00011963 8A2D[BE2F0100]      <1> 	mov	ch, [Last_DOS_DiskNo]
 16575 00011969 EBCE                <1> 	jmp	short sysdir_ok
 16576                              <1> 
 16577                              <1> 
 16578                              <1> systime: ; Get System Date&Time
 16579                              <1> 	; 30/12/2017 (TRDOS 386 = TRDOS v2.0) 
 16580                              <1> 	;	
 16581                              <1>         ; INPUT -> BL =
 16582                              <1> 	;	    0 = Get Date&Time in Unix/Epoch format
 16583                              <1> 	;	    1 = Get Time in MSDOS format
 16584                              <1> 	;	    2 = Get Date in MSDOS format
 16585                              <1> 	;	    3 = Get Date&Time in MSDOS format
 16586                              <1> 	;	    4 & other values =
 16587                              <1> 	;		System timer ticks will be returned
 16588                              <1> 	;		in EAX and Carry Flag will be set.
 16589                              <1> 	;		(CF will not be set if BL = 4)	 	
 16590                              <1> 	; OUTPUT ->
 16591                              <1> 	;	For BL input = 3
 16592                              <1> 	;          EAX = Current Time (RTC)
 16593                              <1> 	;		AL = Second (DL in MSDOS)
 16594                              <1> 	;		AH = Minute (CL in MSDOS)
 16595                              <1> 	;	   	HW of EAX = Hour (CH in MSDOS)	
 16596                              <1> 	;	   EDX = Current System Date (RTC)
 16597                              <1> 	;		DL = Day (DL in MSDOS)
 16598                              <1> 	;		DH = Month (DH in MSDOS)
 16599                              <1> 	;		HW of EDX = Year (CX in MSDOS)	
 16600                              <1> 	;
 16601                              <1> 	;	For BL input = 2
 16602                              <1> 	;	   EAX = Current System Date (RTC)
 16603                              <1> 	;		DL = Day (DL in MSDOS)
 16604                              <1> 	;		DH = Month (DH in MSDOS)
 16605                              <1> 	;		HW of EDX = Year (CX in MSDOS)
 16606                              <1> 	;
 16607                              <1> 	;	For BL input = 1
 16608                              <1> 	;          EAX = Current Time (RTC)
 16609                              <1> 	;		AL = Second (DL in MSDOS)
 16610                              <1> 	;		AH = Minute (CL in MSDOS)
 16611                              <1> 	;	   	HW of EAX = Hour (CH in MSDOS)	
 16612                              <1> 	;
 16613                              <1> 	;	For BL input = 0
 16614                              <1> 	;          EAX = Unix (Epoch) Time Ticks/Seconds
 16615                              <1> 	;
 16616                              <1> 	;	For BL input  = 4
 16617                              <1> 	;	   EAX = System timer ticks
 16618                              <1> 	;
 16619                              <1> 	;	If CF = 1 (for other values of BL input)
 16620                              <1> 	;	   EAX = System timer ticks (no error code!)	
 16621                              <1> 	;		
 16622                              <1> 	; Modified Registers: EAX, (EDX)
 16623                              <1> 	;		 (at the return of system call)
 16624                              <1> 	;
 16625                              <1> 
 16626 0001196B 20DB                <1> 	and	bl, bl
 16627 0001196D 750F                <1> 	jnz	short systime_1
 16628 0001196F E88B54FFFF          <1> 	call	epoch
 16629                              <1> systime_0:
 16630 00011974 A3[1C010300]        <1> 	mov	[u.r0], eax
 16631 00011979 E9F1B3FFFF          <1> 	jmp	sysret
 16632                              <1> systime_1:
 16633 0001197E 80FB04              <1> 	cmp	bl, 4
 16634 00011981 7211                <1> 	jb	short systime_2
 16635 00011983 A1[C8770100]        <1> 	mov	eax, [TIMER_LH] ; 18.2 Hz timer ticks
 16636                              <1> 				; Note: [TIMER_LH] may be set
 16637                              <1> 				; to wrong timer value due to
 16638                              <1> 				; program functions.
 16639                              <1> 				; (This value must not be
 16640                              <1> 				; accepted as [TIMER_LH]/18.2
 16641                              <1> 				; seconds since the midnight.)
 16642 00011988 76EA                <1> 	jna	short systime_0
 16643 0001198A A3[1C010300]        <1> 	mov	[u.r0], eax	
 16644 0001198F E9BBB3FFFF          <1> 	jmp	error ; cf = 1 & [u.r0] = eax = timer ticks 
 16645                              <1> 
 16646                              <1> systime_2:
 16647                              <1> 	;push	ebx
 16648 00011994 E8E053FFFF          <1> 	call	get_rtc_date_time
 16649                              <1> 	;pop	ebx
 16650 00011999 F6C301              <1> 	test	bl, 1
 16651 0001199C 7429                <1> 	jz	short systime_4
 16652 0001199E 30E4                <1> 	xor	ah, ah
 16653 000119A0 A0[12740100]        <1> 	mov	al, [hour]
 16654 000119A5 88C2                <1> 	mov	dl, al
 16655 000119A7 C1E010              <1> 	shl	eax, 16
 16656 000119AA A0[16740100]        <1> 	mov	al, [second]
 16657 000119AF 8A25[14740100]      <1> 	mov	ah, [minute]
 16658 000119B5 F6C302              <1> 	test	bl, 2
 16659 000119B8 74BA                <1> 	jz	short systime_0
 16660                              <1> 	; Check time & date match risk 
 16661                              <1> 	; (23:59:59 may cause to wrong
 16662                              <1> 	; date -new day with previous date-...)
 16663 000119BA 80FA17              <1> 	cmp	dl, 23
 16664 000119BD 7206                <1> 	jb	short systime_3
 16665 000119BF 663D3B3B            <1> 	cmp	ax, (59*256)+59 ; if hour is 23:59:59
 16666 000119C3 73CF                <1> 	jnb	short systime_2 ; wait for 1 second
 16667                              <1> systime_3:
 16668                              <1> 	; eax = time
 16669 000119C5 89C6                <1> 	mov	esi, eax
 16670                              <1> systime_4:	
 16671 000119C7 66A1[0C740100]      <1> 	mov	ax, [year]
 16672 000119CD C1E010              <1> 	shl	eax, 16
 16673 000119D0 A0[10740100]        <1> 	mov	al, [day]
 16674 000119D5 8A25[0E740100]      <1> 	mov	ah, [month]
 16675                              <1> 	; eax = date
 16676 000119DB 80E301              <1> 	and	bl, 1
 16677 000119DE 7494                <1> 	jz	short systime_0
 16678 000119E0 96                  <1> 	xchg	esi, eax
 16679                              <1> 	; eax = time, esi = date
 16680 000119E1 8B2D[18010300]      <1> 	mov	ebp, [u.usp]  ; EBP points to user's registers
 16681                              <1> 	; (user) edx <-- (system) esi
 16682 000119E7 897514              <1> 	mov	[ebp+20], esi ; return to user with EDX value 
 16683 000119EA EB88                <1> 	jmp	short systime_0
 16684                              <1> 
 16685                              <1> 
 16686                              <1> sysstime: ; Set System Date&Time
 16687                              <1> 	; 31/12/2017
 16688                              <1> 	; 30/12/2017 (TRDOS 386 = TRDOS v2.0) 
 16689                              <1> 	;	
 16690                              <1>         ; INPUT -> BL =
 16691                              <1> 	;	    0 = Set Date&Time in Unix/Epoch format
 16692                              <1> 	;	    1 = Set Time in MSDOS format
 16693                              <1> 	;	    2 = Set Date in MSDOS format
 16694                              <1> 	;	    3 = Set Date&Time in MSDOS format
 16695                              <1> 	;	    4 = Set System Timer (Ticks)
 16696                              <1> 	;	    5 = Convert/Save current time to/as
 16697                              <1> 	;		18.2 Hz system timer ticks
 16698                              <1> 	;	    6 = Convert MSDOS Date&Time to UNIX format
 16699                              <1> 	;		without setting system date&time ; (test)
 16700                              <1> 	;	    7 = Convert UNIX Date&Time to MSDOS format
 16701                              <1> 	;		without setting system date&time ; (test)
 16702                              <1> 	;	   8-0FFh = invalid !
 16703                              <1> 	;	  ECX = Time (or Timer) value in selected format  	
 16704                              <1> 	;	  EDX = Date value in MSDOS format if BL=2,3,6	
 16705                              <1> 	; 	
 16706                              <1> 	; OUTPUT ->
 16707                              <1> 	;	If CF = 0 ->
 16708                              <1> 	;          EAX = Set value
 16709                              <1> 	;	If CF = 1 -> (invalid BL input)
 16710                              <1> 	;	   EAX = Ticks count [TIMER_LH]	
 16711                              <1> 	;
 16712                              <1> 
 16713 000119EC 20DB                <1> 	and	bl, bl ; 0
 16714 000119EE 7511                <1> 	jnz	short sysstime_0
 16715 000119F0 89C8                <1> 	mov	eax, ecx
 16716 000119F2 E88D54FFFF          <1> 	call	convert_from_epoch
 16717 000119F7 E82D55FFFF          <1> 	call	set_rtc_date_time
 16718 000119FC E96EB3FFFF          <1> 	jmp	sysret
 16719                              <1> sysstime_0:
 16720 00011A01 80FB08              <1> 	cmp	bl, 8
 16721 00011A04 722D                <1> 	jb	short sysstime_1
 16722                              <1> 	; invalid input (>7)
 16723 00011A06 A1[C8770100]        <1> 	mov	eax, [TIMER_LH] ; 18.2 Hz timer ticks
 16724                              <1> 				; Note: [TIMER_LH] may be set
 16725                              <1> 				; to wrong timer value due to
 16726                              <1> 				; program functions.
 16727                              <1> 				; (This value must not be
 16728                              <1> 				; accepted as [TIMER_LH]/18.2
 16729                              <1> 				; seconds since the midnight.)
 16730 00011A0B A3[1C010300]        <1> 	mov	[u.r0], eax	
 16731 00011A10 E93AB3FFFF          <1> 	jmp	error ; cf = 1 & [u.r0] = eax = timer ticks 
 16732                              <1> 
 16733                              <1> sysstime_8:	
 16734                              <1> 	; BL = 7
 16735 00011A15 89C8                <1> 	mov	eax, ecx ; seconds since 1/1/1970 00:00:00
 16736 00011A17 E86854FFFF          <1> 	call	convert_from_epoch
 16737 00011A1C 30E4                <1> 	xor	ah, ah
 16738 00011A1E A0[12740100]        <1> 	mov	al, [hour]
 16739 00011A23 C1E010              <1> 	shl	eax, 16
 16740 00011A26 A0[16740100]        <1> 	mov	al, [second]
 16741 00011A2B 8A25[14740100]      <1> 	mov	ah, [minute]
 16742 00011A31 EB92                <1> 	jmp	short systime_3
 16743                              <1> 
 16744                              <1> sysstime_1:
 16745 00011A33 80FB04              <1> 	cmp	bl, 4
 16746 00011A36 743F                <1> 	je	short sysstime_2 ; set system timer ticks	
 16747 00011A38 80FB05              <1> 	cmp	bl, 5
 16748 00011A3B 754B                <1> 	jne	short sysstime_4
 16749                              <1> 	; convert current time to system timer ticks (18.2Hz)
 16750 00011A3D E83753FFFF          <1> 	call	get_rtc_date_time
 16751 00011A42 0FB60D[12740100]    <1> 	movzx	ecx, byte [hour]
 16752 00011A49 B8100E0000          <1> 	mov	eax, 60*60 ; 1 hour = 3600 seconds
 16753 00011A4E F7E1                <1> 	mul	ecx
 16754 00011A50 89C3                <1> 	mov	ebx, eax	
 16755 00011A52 B13C                <1> 	mov	cl, 60  ; 1 minute = 60 seconds
 16756 00011A54 0FB605[14740100]    <1> 	movzx	eax, byte [minute]
 16757 00011A5B F7E1                <1> 	mul	ecx
 16758 00011A5D 01D8                <1> 	add	eax, ebx  
 16759 00011A5F 8A0D[16740100]      <1> 	mov	cl, [second]
 16760 00011A65 01C8                <1> 	add	eax, ecx
 16761 00011A67 B1B6                <1> 	mov	cl, 182
 16762 00011A69 F7E1                <1> 	mul	ecx
 16763 00011A6B 83C009              <1> 	add	eax, 9
 16764 00011A6E 83D200              <1> 	adc	edx, 0
 16765 00011A71 B10A                <1> 	mov	cl, 10
 16766 00011A73 F7F1                <1> 	div	ecx
 16767                              <1> 	; eax = ((182*seconds)+9)/10
 16768 00011A75 89C1                <1> 	mov	ecx, eax
 16769                              <1> sysstime_2:
 16770 00011A77 890D[C8770100]      <1> 	mov	[TIMER_LH], ecx ; 18.2 * seconds
 16771                              <1> sysstime_3:
 16772 00011A7D 890D[1C010300]      <1> 	mov	[u.r0], ecx
 16773 00011A83 E9E7B2FFFF          <1> 	jmp	sysret
 16774                              <1> sysstime_4:
 16775 00011A88 80FB06              <1> 	cmp	bl, 6
 16776 00011A8B 7788                <1> 	ja	short sysstime_8
 16777                              <1> 
 16778 00011A8D 890D[1C010300]      <1> 	mov	[u.r0], ecx
 16779                              <1> 
 16780 00011A93 880D[16740100]      <1> 	mov	[second], cl
 16781 00011A99 882D[14740100]      <1> 	mov	[minute], ch
 16782 00011A9F C1E910              <1> 	shr	ecx, 16
 16783 00011AA2 880D[12740100]      <1> 	mov	[hour], cl
 16784                              <1> 	; BL = 1,2,3,6
 16785 00011AA8 80FB01              <1> 	cmp	bl, 1
 16786 00011AAB 762A                <1> 	jna	short sysstime_5
 16787                              <1> 	; BL = 2,3,6
 16788 00011AAD 8815[10740100]      <1> 	mov	[day], dl
 16789 00011AB3 8835[0E740100]      <1> 	mov	[month], dh
 16790 00011AB9 C1EA10              <1> 	shr	edx, 16
 16791 00011ABC 668915[0C740100]    <1> 	mov	[year], dx
 16792 00011AC3 80E303              <1> 	and	bl, 3
 16793 00011AC6 742D                <1> 	jz	short sysstime_7 ; 6
 16794                              <1> 	; BL = 2,3
 16795 00011AC8 F6C301              <1> 	test	bl, 1
 16796 00011ACB 7419                <1> 	jz	short sysstime_6 ; 2
 16797                              <1> 	; BL = 3
 16798 00011ACD E85754FFFF          <1> 	call	set_rtc_date_time
 16799 00011AD2 E998B2FFFF          <1> 	jmp	sysret
 16800                              <1> sysstime_5:
 16801                              <1> 	; BL = 1
 16802 00011AD7 E88E54FFFF          <1> 	call	set_time_bcd
 16803 00011ADC E89647FFFF          <1> 	call	set_rtc_time
 16804 00011AE1 E989B2FFFF          <1> 	jmp	sysret	
 16805                              <1> sysstime_6:
 16806                              <1> 	; BL = 2
 16807 00011AE6 E85254FFFF          <1> 	call	set_date_bcd
 16808 00011AEB E8EA47FFFF          <1> 	call	set_rtc_date
 16809 00011AF0 E97AB2FFFF          <1> 	jmp	sysret
 16810                              <1> sysstime_7:
 16811                              <1> 	; BL = 6
 16812                              <1> 	; [year], [month], [day], 
 16813                              <1> 	; [hour], [minute], [second]
 16814 00011AF5 E80A53FFFF          <1> 	call	convert_to_epoch
 16815 00011AFA 89C1                <1> 	mov	ecx, eax ; seconds since 1/1/1970 00:00:00
 16816 00011AFC E97CFFFFFF          <1> 	jmp	sysstime_3
 16817                              <1> 
 16818                              <1> sysrename: ; Rename File (or Directory)
 16819                              <1> 	; 08/08/2022
 16820                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
 16821                              <1> 	; 19/01/2021
 16822                              <1> 	; 31/12/2017 (TRDOS 386 = TRDOS v2.0) 
 16823                              <1> 	;	
 16824                              <1>         ; INPUT ->
 16825                              <1>         ;          EBX = File/Directory (ASCIIZ) name address
 16826                              <1> 	;	   ECX = New name (in same dir, no path name)			
 16827                              <1> 	; OUTPUT ->
 16828                              <1> 	;          cf = 0 -> EAX = 0
 16829                              <1> 	;          cf = 1 -> Error code in AL
 16830                              <1> 
 16831                              <1> 	; 19/01/2021
 16832 00011B01 803D[6E010300]00    <1> 	cmp	byte [u.uid], 0  ; root (super user) ?
 16833                              <1> 	;jna	short sysrename_0
 16834                              <1> 	; 23/07/2022
 16835 00011B08 7717                <1> 	ja	short sysrename_perm_err
 16836                              <1> 
 16837                              <1> ;sysrename_perm_err:
 16838                              <1> ;	;mov	dword [u.r0], ERR_PERM_DENIED
 16839                              <1> ;	mov	eax, ERR_PERM_DENIED ; 'permission denied !'
 16840                              <1> ;	mov	[u.r0], eax
 16841                              <1> ;	mov	[u.error], eax
 16842                              <1> ;	jmp	error
 16843                              <1> 
 16844                              <1> sysrename_0:
 16845 00011B0A 51                  <1> 	push	ecx ; new file name address (in user space)
 16846 00011B0B 89DE                <1> 	mov	esi, ebx
 16847                              <1> 	; file name is forced, change directory as temporary
 16848                              <1> 	;mov	ax, 1
 16849                              <1> 	;mov	[FFF_Valid], ah ; 0 ; reset
 16850                              <1> 	;call	set_working_path 
 16851 00011B0D E85B050000          <1> 	call	set_working_path_x
 16852 00011B12 7321                <1> 	jnc	short sysrename_1
 16853 00011B14 21C0                <1> 	and	eax, eax  ; 0 -> Bad Path!  
 16854 00011B16 753B                <1> 	jnz	short sysrename_err
 16855                              <1> 	; eax = 0
 16856                              <1> sysrename_path_not_found:
 16857 00011B18 B813000000          <1> 	mov	eax, ERR_INV_PATH_NAME ; 'Bad path name !'
 16858                              <1> 	; 23/07/2022
 16859 00011B1D B013                <1> 	mov	al, ERR_INV_PATH_NAME
 16860 00011B1F EB32                <1> 	jmp	short sysrename_err
 16861                              <1> ;sysrename_err:
 16862                              <1> ;	pop	ecx ; new file name address (in user space)
 16863                              <1> ;sysrename_error:
 16864                              <1> ;	mov	[u.r0], eax
 16865                              <1> ;	mov	[u.error], eax
 16866                              <1> ;	call 	reset_working_path
 16867                              <1> ;	jmp	error
 16868                              <1> 	
 16869                              <1> 	; 23/07/2022
 16870                              <1> sysrename_perm_err:
 16871                              <1> 	;mov	dword [u.r0], ERR_PERM_DENIED
 16872 00011B21 B80B000000          <1> 	mov	eax, ERR_PERM_DENIED ; 'permission denied !'
 16873 00011B26 A3[1C010300]        <1> 	mov	[u.r0], eax
 16874 00011B2B A3[84010300]        <1> 	mov	[u.error], eax
 16875 00011B30 E91AB2FFFF          <1> 	jmp	error
 16876                              <1> 
 16877                              <1> sysrename_1:
 16878 00011B35 B008                <1> 	mov	al, 08h ; Except volume labels (& long names)
 16879 00011B37 A0[C0810100]        <1> 	mov	al, [Attributes]
 16880 00011B3C 2410                <1> 	and	al, 10h ;
 16881                              <1> 	;mov	esi, FindFile_Name
 16882                              <1> 	;mov	ax, 1800h ; Only files
 16883                              <1> 	;mov	ax, 0810h ; Only directories
 16884 00011B3E 66B80008            <1> 	mov	ax, 0800h ; Find File or Directory
 16885 00011B42 E8496FFFFF          <1> 	call	find_first_file
 16886                              <1> 	;jnc	short sysrename_2
 16887 00011B47 720A                <1> 	jc	short sysrename_err
 16888                              <1> sysrename_2:
 16889                              <1> 	; ESI = Directory Entry (FindFile_DirEntry) Location
 16890                              <1> 	; EDI = Directory Buffer Directory Entry Location
 16891                              <1> 	; EAX = File Size
 16892                              <1> 	;  BL = Attributes of The File/Directory
 16893                              <1> 	;  BH = Long Name Yes/No Status (>0 is YES)
 16894                              <1> 	;  DX > 0 : Ambiguous filename chars are used
 16895                              <1> 
 16896 00011B49 6621D2              <1> 	and	dx, dx ; Ambiguous filename chars used sign (DX>0)
 16897 00011B4C 741A                <1> 	jz	short sysrename_3
 16898 00011B4E B81A000000          <1> 	mov	eax, ERR_INV_FILE_NAME ; 'invalid file name !'
 16899                              <1> 	;jmp	short sysrename_err
 16900                              <1> 	; 23/07/2022	
 16901                              <1> sysrename_err:
 16902 00011B53 59                  <1> 	pop	ecx ; new file name address (in user space)
 16903                              <1> sysrename_error:
 16904 00011B54 A3[1C010300]        <1> 	mov	[u.r0], eax
 16905 00011B59 A3[84010300]        <1> 	mov	[u.error], eax
 16906 00011B5E E8DF050000          <1> 	call 	reset_working_path
 16907 00011B63 E9E7B1FFFF          <1> 	jmp	error
 16908                              <1> sysrename_3:
 16909                              <1> 	; EDI = Directory buffer entry offset/address
 16910                              <1> 	; BL = File (or Directory) Attributes 
 16911                              <1> 	; mov	bl, [EDI+0Bh]
 16912                              <1> 
 16913 00011B68 5A                  <1> 	pop	edx ; new file name address (in user space)
 16914                              <1> 
 16915                              <1> 	; check file/directory attributes
 16916 00011B69 F6C307              <1> 	test	bl, 7 ; system, hidden, readonly 
 16917 00011B6C 75B3                <1>         jnz	short sysrename_perm_err
 16918                              <1> sysrename_4:
 16919 00011B6E 66817F0CA101        <1> 	cmp	word [edi+DirEntry_NTRes], 01A1h ; Singlix FS
 16920 00011B74 74AB                <1> 	je	short sysrename_perm_err ; -temporary!-
 16921                              <1> 
 16922                              <1> 	; save old file name & file info (FFF structure)
 16923 00011B76 BE[AA800100]        <1> 	mov	esi, FindFile_Drv
 16924 00011B7B BF[F0810100]        <1> 	mov	edi, SourceFile_Drv
 16925                              <1> 	;mov	ecx, 128/4
 16926                              <1> 	; 23/07/2022
 16927 00011B80 29C9                <1> 	sub	ecx, ecx
 16928 00011B82 B120                <1> 	mov	cl, 128/4
 16929 00011B84 F3A5                <1> 	rep	movsd
 16930                              <1> 
 16931 00011B86 89D6                <1> 	mov	esi, edx ; new file name address (in user space)
 16932 00011B88 BF[70820100]        <1> 	mov	edi, DestinationFile_Drv
 16933 00011B8D E8C28FFFFF          <1> 	call	parse_path_name
 16934 00011B92 72C0                <1> 	jc	short sysrename_error ; eax = 1 (Bad file name)
 16935                              <1> 
 16936                              <1> 	; same drive ? 
 16937 00011B94 A0[AA800100]        <1> 	mov	al, [FindFile_Drv]
 16938 00011B99 3A05[70820100]      <1> 	cmp	al, [DestinationFile_Drv]
 16939                              <1> 	;jne	short sysrename_perm_err ; Permission denied
 16940 00011B9F 7509                <1> 	jne	short sysrename_5 ; Bad file name
 16941                              <1>  
 16942                              <1> 	; no path name !? (rename file in same directory)
 16943 00011BA1 803D[71820100]20    <1> 	cmp	byte [DestinationFile_Directory], 20h
 16944 00011BA8 7607                <1> 	jna	short sysrename_6
 16945                              <1> sysrename_5:
 16946 00011BAA B801000000          <1> 	mov	eax, ERR_BAD_CMD_ARG ; 1 = Bad file name 
 16947                              <1> 				     ; (Bad argument)
 16948 00011BAF EBA3                <1> 	jmp	short sysrename_error
 16949                              <1> sysrename_6:
 16950 00011BB1 803D[B2820100]20    <1> 	cmp	byte [DestinationFile_Name], 20h
 16951 00011BB8 76F0                <1> 	jna	short sysrename_5
 16952                              <1> 
 16953 00011BBA BE[B2820100]        <1> 	mov	esi, DestinationFile_Name
 16954 00011BBF E87172FFFF          <1> 	call	check_filename ; is it a valid msdos file name?
 16955 00011BC4 728E                <1> 	jc	short sysrename_error ; 26 = ERR_INV_FILE_NAME 
 16956                              <1> 	
 16957                              <1> 	;mov	esi, DestinationFile_Name
 16958 00011BC6 66B80008            <1> 	mov	ax, 0800h ; Find File or Directory
 16959 00011BCA E8C16EFFFF          <1> 	call	find_first_file
 16960 00011BCF 720A                <1> 	jc	short sysrename_7
 16961                              <1> 	
 16962 00011BD1 B80E000000          <1> 	mov	eax, ERR_FILE_EXISTS  ; file already exists !
 16963                              <1> jmp_sysrename_err:	; 08/08/2022
 16964 00011BD6 E979FFFFFF          <1> 	jmp	sysrename_error
 16965                              <1> sysrename_7:
 16966                              <1> 	; eax = 2 (File not found !)
 16967 00011BDB 3C02                <1> 	cmp	al, 2 ; ERR_NOT_FOUND
 16968                              <1> 	;jne	short sysrename_error
 16969                              <1> 	; 08/08/2022
 16970 00011BDD 75F7                <1> 	jne	short jmp_sysrename_err
 16971                              <1> 
 16972                              <1> 	; 31/12/2017
 16973                              <1> 	; Following code is also part of 'rename_file' in
 16974                              <1> 	; 'trdosk3.s' (MainProg's 'rename' command) ; 13/11/2017
 16975 00011BDF BE[B2820100]        <1> 	mov	esi, DestinationFile_Name ; (Rename_NewName)
 16976 00011BE4 668B0D[6A820100]    <1> 	mov	cx, [SourceFile_DirEntryNumber] 
 16977 00011BEB 66A1[56820100]      <1> 	mov	ax, [SourceFile_DirEntry+20] ; First Cluster, HW 
 16978 00011BF1 C1E010              <1> 	shl	eax, 16
 16979 00011BF4 66A1[5C820100]      <1> 	mov	ax, [SourceFile_DirEntry+26] ; First Cluster, LW 
 16980 00011BFA 0FB61D[3F820100]    <1>   	movzx	ebx, byte [SourceFile_LongNameEntryLength]  
 16981 00011C01 E85697FFFF          <1>    	call	rename_directory_entry
 16982                              <1> 	;jc	short sysrename_error
 16983                              <1> 	; 08/08/2022
 16984 00011C06 72CE                <1> 	jc	short jmp_sysrename_err
 16985                              <1> 	;xor	eax, eax
 16986 00011C08 A3[1C010300]        <1> 	mov	[u.r0], eax ; 0
 16987                              <1> 	;mov	[u.error], eax
 16988 00011C0D E830050000          <1> 	call 	reset_working_path
 16989 00011C12 E958B1FFFF          <1> 	jmp	sysret
 16990                              <1> 
 16991                              <1> sysmem: ; Get Total&Free Memory amount 
 16992                              <1> 	; 31/12/2017 (TRDOS 386 = TRDOS v2.0) 
 16993                              <1> 	;	
 16994                              <1>         ; INPUT -> 
 16995                              <1> 	;	none	
 16996                              <1> 	; OUTPUT ->
 16997                              <1> 	;	EAX = Total memory count (in bytes)
 16998                              <1> 	;	EBX = Virtually available memory amount (in bytes)
 16999                              <1> 	;	      = 4GB - CORE (4MB)	
 17000                              <1> 	;	ECX = Free memory count (in bytes)
 17001                              <1> 	;	EDX = Calculated free memory count (in bytes)
 17002                              <1> 	
 17003 00011C17 A1[4C770100]        <1> 	mov	eax, [memory_size] ; in pages
 17004 00011C1C C1E00C              <1> 	shl	eax, 12		   ; in bytes
 17005 00011C1F A3[1C010300]        <1> 	mov	[u.r0], eax
 17006 00011C24 E8A425FFFF          <1> 	call	calc_free_mem
 17007                              <1> 	; edx = calculated free pages
 17008                              <1> 	; ecx = 0
 17009 00011C29 8B2D[18010300]      <1> 	mov	ebp, [u.usp]  ; EBP points to user's registers
 17010 00011C2F C745100000C0FF      <1> 	mov	dword [ebp+16], ECORE ; EBX (for user)
 17011                              <1> 				; 0FFC00000h ; 4GB - 4MB
 17012 00011C36 C1E20C              <1> 	shl	edx, 12
 17013 00011C39 895514              <1> 	mov	[ebp+20], edx ; EDX (for user)
 17014 00011C3C 8B0D[50770100]      <1> 	mov 	ecx, [free_pages]
 17015 00011C42 C1E10C              <1> 	shl	ecx, 12	; free bytes
 17016 00011C45 894D18              <1> 	mov	[ebp+24], ecx ; ECX (for user)
 17017                              <1> 	;mov	[free_pages], edx	
 17018 00011C48 E922B1FFFF          <1> 	jmp	sysret
 17019                              <1> 
 17020                              <1> sysprompt:
 17021                              <1> 	; Set TRDOS 386 Command Interpreter (MainProg) prompt 
 17022                              <1> 	; 30/07/2022 (TRDOS 386 Kernel v2.0.5)
 17023                              <1> 	; 31/12/2017 (TRDOS 386 = TRDOS v2.0) 
 17024                              <1> 	;	
 17025                              <1>         ; INPUT -> 
 17026                              <1> 	;	EBX = 0 -> use default prompt
 17027                              <1> 	;	EBX > 0 -> prompt string (ASCIIZ) address
 17028                              <1> 	;		  (Max. 11 characters except ZERO tail)	
 17029                              <1> 	; OUTPUT ->
 17030                              <1> 	;	(EAX = 0)
 17031                              <1> 	;	CF = 0 -> Successful
 17032                              <1> 	;	CF = 1 -> Failed
 17033                              <1> 
 17034 00011C4D 21DB                <1> 	and	ebx, ebx
 17035 00011C4F 750A                <1> 	jnz	short sysprompt_0
 17036                              <1> 
 17037 00011C51 E86068FFFF          <1> 	call	default_command_prompt ; '['+'TRDOS'+']'
 17038 00011C56 E914B1FFFF          <1> 	jmp	sysret
 17039                              <1> 
 17040                              <1> sysprompt_0:
 17041 00011C5B 31C0                <1> 	xor	eax, eax
 17042 00011C5D A3[1C010300]        <1> 	mov	[u.r0], eax 
 17043 00011C62 89DE                <1> 	mov	esi, ebx
 17044                              <1> 	;mov	ecx, 12
 17045                              <1> 	; 30/07/2022
 17046 00011C64 31C9                <1> 	xor	ecx, ecx
 17047 00011C66 B10C                <1> 	mov	cl, 12
 17048 00011C68 89E5                <1> 	mov	ebp, esp
 17049 00011C6A 29CC                <1> 	sub	esp, ecx
 17050 00011C6C 49                  <1> 	dec	ecx ; 11
 17051 00011C6D 89E7                <1> 	mov	edi, esp
 17052 00011C6F E87FF1FFFF          <1> 	call	transfer_from_user_buffer
 17053 00011C74 7211                <1> 	jc	short sysprompt_err
 17054 00011C76 803E20              <1> 	cmp	byte [esi], 20h
 17055 00011C79 760C                <1> 	jna	short sysprompt_err
 17056 00011C7B E84868FFFF          <1> 	call	set_command_prompt
 17057 00011C80 89EC                <1> 	mov	esp, ebp
 17058 00011C82 E9E8B0FFFF          <1> 	jmp	sysret
 17059                              <1> sysprompt_err:
 17060                              <1> syspath_err:
 17061 00011C87 89EC                <1> 	mov	esp, ebp
 17062 00011C89 E9C1B0FFFF          <1> 	jmp	error
 17063                              <1> 
 17064                              <1> syspath:
 17065                              <1> 	; Get/Set Run Path
 17066                              <1> 	;
 17067                              <1> 	; 30/07/2022 (TRDOS 386 Kernel v2.0.5)
 17068                              <1> 	; 31/12/2017 (TRDOS 386 = TRDOS v2.0) 
 17069                              <1> 	;	
 17070                              <1>         ; INPUT -> 
 17071                              <1> 	;	EBX = 0 -> get path (to buffer address in ECX)
 17072                              <1> 	;	EBX > 0 -> set path
 17073                              <1> 	;	    EBX = Path string buffer address (ASCIIZ)
 17074                              <1> 	;	    	  (Path description except 'PATH=')
 17075                              <1> 	;	ECX = Buffer address (if EBX = 0)
 17076                              <1> 	;	      (ECX will not be used if EBX > 0)	
 17077                              <1> 	;	DL = Buffer size (0 = 256 byte)	
 17078                              <1> 	;
 17079                              <1> 	; OUTPUT ->
 17080                              <1> 	;	CF = 0 -> Successful (EAX = String length)
 17081                              <1> 	;	CF = 1 -> Failed (EAX = 0)
 17082                              <1> 	;
 17083                              <1> 	; NOTE: 'PATH=' or 'PATH' must be excluded
 17084                              <1> 	;  (It must not be at the beginning of the string.)
 17085                              <1> 
 17086 00011C8E 89E5                <1> 	mov	ebp, esp
 17087 00011C90 81EC00010000        <1> 	sub	esp, 256
 17088 00011C96 89E7                <1> 	mov	edi, esp
 17089                              <1> 
 17090 00011C98 31C0                <1> 	xor	eax, eax
 17091 00011C9A A3[1C010300]        <1> 	mov	[u.r0], eax 
 17092                              <1> 	
 17093 00011C9F 21DB                <1> 	and	ebx, ebx
 17094 00011CA1 752A                <1> 	jnz	short syspath_0
 17095                              <1> 
 17096                              <1> 	; EBX = 0 -> get run path
 17097 00011CA3 89CB                <1> 	mov	ebx, ecx ; buffer addr (in user's mem space)
 17098 00011CA5 BE[93300100]        <1> 	mov	esi, Cmd_Path  ; 'PATH' address
 17099 00011CAA 0FB6CA              <1> 	movzx	ecx, dl
 17100                              <1> 	;sub	cl, 1 ; 0 -> 255, 1 -> 0
 17101                              <1> 	;adc	cx, 1 ; 255 -> 256, 0 -> 1
 17102                              <1> 	; 30/07/2022
 17103 00011CAD FEC9                <1> 	dec	cl ; 0 -> 255, 1 -> 0
 17104 00011CAF 41                  <1> 	inc	ecx ; 255 -> 256, 0 -> 1 
 17105                              <1> 	; EDI = Output buffer 
 17106                              <1> 	; CX = Buffer length
 17107                              <1> 	; AL = 0 -> use ASCIIZ word in [ESI]
 17108                              <1> 	; ESI = 'PATH' address (with zero tail)
 17109 00011CB0 E8837FFFFF          <1> 	call	get_environment_string
 17110 00011CB5 72D0                <1> 	jc	short syspath_err
 17111 00011CB7 89DF                <1> 	mov	edi, ebx ; User's buffer address
 17112 00011CB9 89E6                <1> 	mov	esi, esp 
 17113                              <1> 	; EDI = User's buffer address
 17114                              <1> 	; ECX = transfer (byte) count
 17115 00011CBB E8E9F0FFFF          <1> 	call	transfer_to_user_buffer
 17116 00011CC0 72C5                <1> 	jc	short syspath_err
 17117 00011CC2 890D[1C010300]      <1> 	mov	[u.r0], ecx 
 17118 00011CC8 E9A2B0FFFF          <1> 	jmp	sysret
 17119                              <1> 
 17120                              <1> syspath_0:
 17121 00011CCD 89DE                <1> 	mov	esi, ebx
 17122 00011CCF 0FB6CA              <1> 	movzx	ecx, dl
 17123                              <1> 	;sub	cl, 1 ; 0 -> 255, 1 -> 0
 17124                              <1> 	;adc	cx, 1 ; 255 -> 256, 0 -> 1
 17125                              <1> 	; 30/07/2022
 17126 00011CD2 FEC9                <1> 	dec	cl ; 0 -> 255, 1 -> 0
 17127 00011CD4 41                  <1> 	inc	ecx ; 255 -> 256, 0 -> 1
 17128 00011CD5 E819F1FFFF          <1> 	call	transfer_from_user_buffer
 17129 00011CDA 72AB                <1> 	jc	short syspath_err
 17130                              <1> 	;(*) 'PATH=' will be added to 
 17131                              <1> 	;         the head of the string
 17132 00011CDC 83EC08              <1> 	sub	esp, 8 ;(*)
 17133 00011CDF 89FE                <1> 	mov	esi, edi ;(*)
 17134 00011CE1 E8367FFFFF          <1> 	call	set_path_x ;(*)
 17135 00011CE6 729F                <1> 	jc	short syspath_err
 17136 00011CE8 8915[1C010300]      <1> 	mov	[u.r0], edx ; run path string length
 17137 00011CEE E97CB0FFFF          <1> 	jmp	sysret	
 17138                              <1> 
 17139                              <1> sysenv:
 17140                              <1> 	; Get/Set Environment Variables
 17141                              <1> 	;
 17142                              <1> 	; 30/07/2022
 17143                              <1> 	; 23/07/2022 - TRDOS 386 v2.0.5
 17144                              <1> 	; 31/12/2017 (TRDOS 386 = TRDOS v2.0) 
 17145                              <1> 	;	
 17146                              <1>         ; INPUT -> 
 17147                              <1> 	;	EBX = 0 -> get (all) environment variables
 17148                              <1> 	;	      (Required Buffer length = 512 bytes)
 17149                              <1> 	;	EBX > 0 -> set (one) environment variable
 17150                              <1> 	;	      (If there is not a '=' after
 17151                              <1> 	;	      the environment variable name, it will
 17152                              <1> 	;	      accepted as 'get environment variable'.) 
 17153                              <1> 	;	       EBX = Buffer address
 17154                              <1> 	;	ECX = Buffer address (if EBX = 0)
 17155                              <1> 	;	      (ECX will not be used if EBX > 0)	
 17156                              <1> 	;	      (Note: Buffer size is 512 bytes.)	
 17157                              <1> 	;	DL = Buffer size (0 = 256 byte)
 17158                              <1> 	;	     (For one envrionment variable)		
 17159                              <1> 	;
 17160                              <1> 	; OUTPUT ->
 17161                              <1> 	;	(EAX = 0)
 17162                              <1> 	;	CF = 0 -> Successful (EAX = String length)
 17163                              <1> 	;	CF = 1 -> Failed (EAX = 0)
 17164                              <1> 	;
 17165                              <1> 	; Note: Environment variable name, for example,
 17166                              <1> 	;	'PATH=' must be included at the beginning
 17167                              <1> 	;	of the environment string. If the variable
 17168                              <1> 	;	name is as 'PATH' but it is not as 'PATH='
 17169                              <1> 	;	the variable string (row) will be returned.
 17170                              <1> 	;	If variable name is as 'PATH=' but there is
 17171                              <1> 	;	not a following text after the variable name,
 17172                              <1> 	;	the environment variable will be reset/deleted.
 17173                              <1> 
 17174 00011CF3 89E5                <1> 	mov	ebp, esp
 17175 00011CF5 81EC00020000        <1> 	sub	esp, 512
 17176 00011CFB 89E7                <1> 	mov	edi, esp
 17177                              <1> 
 17178 00011CFD 31C0                <1> 	xor	eax, eax
 17179 00011CFF A3[1C010300]        <1> 	mov	[u.r0], eax 
 17180                              <1> 	
 17181 00011D04 21DB                <1> 	and	ebx, ebx
 17182 00011D06 751F                <1> 	jnz	short sysenv_0
 17183                              <1> 
 17184                              <1> 	; EBX = 0 -> get (all) environment variables
 17185 00011D08 89EC                <1> 	mov	esp, ebp
 17186 00011D0A BE00300900          <1> 	mov	esi, Env_Page  ; Environment page
 17187 00011D0F 89CF                <1> 	mov	edi, ecx ; buffer addr (in user's mem space)
 17188                              <1> 	;mov	ecx, 512
 17189                              <1> 	; 30/07/2022
 17190 00011D11 29C9                <1> 	sub	ecx, ecx
 17191 00011D13 B502                <1> 	mov	ch, 2
 17192                              <1> 	; ecx = 512
 17193 00011D15 E88FF0FFFF          <1> 	call	transfer_to_user_buffer
 17194                              <1> 	;jc	error
 17195                              <1> 	; 23/07/2022
 17196 00011D1A 725B                <1> 	jc	short sysenv_error
 17197 00011D1C 890D[1C010300]      <1> 	mov	[u.r0], ecx 
 17198 00011D22 E948B0FFFF          <1> 	jmp	sysret
 17199                              <1> 
 17200                              <1> sysenv_0:
 17201 00011D27 89DE                <1> 	mov	esi, ebx ; * ; user's buffer address
 17202 00011D29 0FB6CA              <1> 	movzx	ecx, dl
 17203                              <1> 	;sub	cl, 1 ; 0 -> 255, 1 -> 0
 17204                              <1> 	;adc	cx, 1 ; 255 -> 256, 0 -> 1
 17205                              <1> 	; 30/07/2022
 17206 00011D2C FEC9                <1> 	dec	cl ; 0 -> 255, 1 -> 0
 17207 00011D2E 41                  <1> 	inc	ecx ; 255 -> 256, 0 -> 1
 17208 00011D2F E8BFF0FFFF          <1> 	call	transfer_from_user_buffer
 17209 00011D34 723F                <1> 	jc	short sysenv_err
 17210 00011D36 89FE                <1> 	mov	esi, edi
 17211 00011D38 8A06                <1> 	mov	al, [esi]
 17212 00011D3A 3C20                <1> 	cmp	al, 20h
 17213 00011D3C 7637                <1> 	jna	short sysenv_err
 17214 00011D3E 3C3D                <1> 	cmp	al, '='
 17215 00011D40 7433                <1> 	je	short sysenv_err
 17216 00011D42 56                  <1> 	push	esi
 17217                              <1> sysenv_1:
 17218 00011D43 46                  <1> 	inc	esi
 17219 00011D44 803E3D              <1> 	cmp	byte [esi], '='
 17220 00011D47 7433                <1> 	je	short sysenv_3
 17221 00011D49 803E20              <1> 	cmp	byte [esi], 20h
 17222 00011D4C 73F5                <1> 	jnb	short sysenv_1
 17223 00011D4E C60600              <1> 	mov	byte [esi], 0 
 17224 00011D51 5E                  <1> 	pop	esi
 17225                              <1> 	; EDI = Output buffer 
 17226                              <1> 	; CX = Buffer length
 17227 00011D52 30C0                <1> 	xor	al, al
 17228                              <1> 	; AL = 0 -> use ASCIIZ word in [ESI]
 17229                              <1> 	; ESI = Environment variable name address
 17230 00011D54 E8DF7EFFFF          <1> 	call	get_environment_string
 17231 00011D59 721A                <1> 	jc	short sysenv_err
 17232 00011D5B 89DF                <1> 	mov	edi, ebx ; * ; user's buffer address
 17233 00011D5D 89C1                <1> 	mov	ecx, eax ; String length
 17234 00011D5F 89E6                <1> 	mov	esi, esp 
 17235                              <1> 	; ESI = system buffer address
 17236                              <1> 	; EDI = User's buffer address
 17237                              <1> 	; ECX = transfer (byte) count
 17238 00011D61 E843F0FFFF          <1> 	call	transfer_to_user_buffer
 17239 00011D66 720D                <1> 	jc	short sysenv_err
 17240 00011D68 890D[1C010300]      <1> 	mov	[u.r0], ecx ; transfer (byte) count
 17241                              <1> sysenv_2:
 17242 00011D6E 89EC                <1> 	mov	esp, ebp
 17243 00011D70 E9FAAFFFFF          <1> 	jmp	sysret
 17244                              <1> sysenv_err:
 17245 00011D75 89EC                <1> 	mov	esp, ebp
 17246                              <1> sysenv_error:	; 23/07/2022
 17247 00011D77 E9D3AFFFFF          <1> 	jmp	error
 17248                              <1> sysenv_3:
 17249 00011D7C 46                  <1> 	inc	esi
 17250 00011D7D 803E20              <1> 	cmp	byte [esi], 20h
 17251 00011D80 73FA                <1> 	jnb	short sysenv_3
 17252 00011D82 C60600              <1> 	mov	byte [esi], 0	
 17253 00011D85 5E                  <1> 	pop	esi
 17254 00011D86 E8707FFFFF          <1> 	call	set_environment_string
 17255 00011D8B 72E8                <1> 	jc	short sysenv_err
 17256 00011D8D 8915[1C010300]      <1> 	mov	[u.r0], edx
 17257 00011D93 EBD9                <1> 	jmp	short sysenv_2
 17258                              <1> 
 17259                              <1> ; 23/07/2022 - TRDOS 386 v2.0.5
 17260                              <1> 
 17261                              <1> ; 22/01/2021
 17262                              <1> ; temporary - 24/01/2016
 17263                              <1> 
 17264                              <1> iget:
 17265                              <1> 	;retn
 17266                              <1> isintr:
 17267                              <1> 	;retn
 17268                              <1> iopen:
 17269                              <1> 	;retn
 17270                              <1> iclose:
 17271                              <1> 	;retn
 17272                              <1> sndc:
 17273                              <1> 	;retn
 17274                              <1> access:
 17275                              <1> 	;retn
 17276                              <1> sleep:
 17277 00011D95 C3                  <1> 	retn
  3313                                  %include 'trdosk7.s' ; 24/01/2016
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.6) - DISK READ&WRITE : trdosk7.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 29/08/2023  (Previous: 25/07/2022 - Kernel v2.0.5)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 24/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.11 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Derived from TRDOS Operating System v1.0 (8086) source code by Erdogan Tan
    11                              <1> ; DISK_IO.ASM (20/07/2011)
    12                              <1> ; ****************************************************************************
    13                              <1> ; DISK_IO.ASM (c) 2009-2011 Erdogan TAN [ 04/07/2009 ] Last Update: 20/07/2011
    14                              <1> 
    15                              <1> disk_write:
    16                              <1> 	; 25/02/2016
    17                              <1> 	; 24/02/2016
    18                              <1> 	; 23/02/2016
    19 00011D96 807E0500            <1> 	cmp	byte [esi+LD_LBAYes], 0
    20 00011D9A 7774                <1>         ja      short lba_write
    21                              <1> 
    22                              <1> chs_write:
    23                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
    24                              <1> 	; 25/02/2016
    25                              <1> 	; 23/02/2016
    26 00011D9C C605[F97F0100]03    <1> 	mov	byte [disk_rw_op], 3 ; CHS write
    27 00011DA3 EB0D                <1> 	jmp	short chs_rw
    28                              <1> 
    29                              <1> disk_read:
    30                              <1> 	; 25/02/2016
    31                              <1> 	; 24/02/2016
    32                              <1> 	; 23/02/2016
    33                              <1> 	; 17/02/2016
    34                              <1> 	; 14/02/2016
    35                              <1> 	; 31/01/2016 (TRDOS 386 = TRDOS v2.0)
    36                              <1> 	; 17/10/2010
    37                              <1> 	; 18/04/2010
    38                              <1> 	;
    39                              <1> 	; INPUT -> EAX = Logical Block Address
    40                              <1> 	;	   ESI = Logical Dos Disk Table Offset (DRV)	
    41                              <1> 	;	   ECX = Sector Count	
    42                              <1> 	; 	   EBX = Destination Buffer
    43                              <1> 	; OUTPUT -> 
    44                              <1> 	;	   cf = 0 or cf = 1
    45                              <1> 	; (Modified registers: EAX, EBX, ECX, EDX)
    46                              <1> 
    47 00011DA5 807E0500            <1> 	cmp	byte [esi+LD_LBAYes], 0
    48 00011DA9 776E                <1>         ja      short lba_read
    49                              <1> 
    50                              <1> chs_read:
    51                              <1> 	; 29/08/2023 (TRDOS 386 Kernel v2.0.6)
    52                              <1> 	; 25/07/2022 (TRDOS 386 Kernel v2.0.5)
    53                              <1> 	; 25/02/2016
    54                              <1> 	; 24/02/2016
    55                              <1> 	; 23/02/2016
    56                              <1> 	; 31/01/2016 (TRDOS 386 = TRDOS v2.0)
    57                              <1> 	; 20/07/2011
    58                              <1> 	; 04/07/2009
    59                              <1> 	;
    60                              <1> 	; INPUT -> EAX = Logical Block Address
    61                              <1> 	;	   ECX = Number of sectors to read
    62                              <1> 	; 	   ESI = Logical Dos Disk Table Offset (DRV)
    63                              <1> 	; 	   EBX = Destination Buffer
    64                              <1> 	; OUTPUT -> 
    65                              <1> 	;	   cf = 0 or cf = 1
    66                              <1> 	; (Modified registers: EAX; EBX, ECX, EDX)
    67                              <1> 
    68                              <1> 	; 23/02/2016
    69 00011DAB C605[F97F0100]02    <1> 	mov	byte [disk_rw_op], 2 ; CHS read
    70                              <1> 
    71                              <1> chs_rw:
    72                              <1> 	;;movzx	edx, word [esi+LD_BPB+SecPerTrack]
    73                              <1> 	;movzx	edx, byte [esi+LD_BPB+SecPerTrack] ; <= 63
    74                              <1> 	;mov	[disk_rw_spt], dl
    75                              <1> 
    76                              <1> chs_read_next_sector:
    77 00011DB2 C605[FA7F0100]04    <1> 	mov	byte [retry_count], 4
    78                              <1>      
    79                              <1> chs_read_retry:
    80                              <1> 	;mov	[sector_count], ecx ; 23/02/2016
    81                              <1> 
    82 00011DB9 50                  <1> 	push	eax			; Linear sector #
    83 00011DBA 51                  <1> 	push	ecx			; # of FAT/FILE/DIR sectors
    84                              <1>                 
    85 00011DBB 0FB74E1E            <1> 	movzx	ecx, word [esi+LD_BPB+SecPerTrack]
    86                              <1> 	;movzx	ecx, byte [disk_rw_spt] ; 23/02/2016
    87 00011DBF 29D2                <1> 	sub	edx, edx
    88 00011DC1 F7F1                <1> 	div	ecx
    89                              <1> 	; eax = track, dx (dl ) = sector (on track)
    90                              <1> 	;sub	cl, dl ; 24/02/2016 (spt - sec)
    91                              <1> 	;push	ecx ; *
    92                              <1> 	; 25/07/2022
    93                              <1> 	;mov	cx, dx			; Sector (zero based)
    94                              <1> 	;inc	cx			; To make it 1 based
    95                              <1> 	;push	cx
    96                              <1> 	; 29/08/2023
    97                              <1> 	;mov	ecx, edx
    98                              <1> 	;inc	ecx
    99                              <1> 	;push	ecx
   100 00011DC3 42                  <1> 	inc	edx
   101 00011DC4 52                  <1> 	push	edx ; dl = sector number (on track)
   102                              <1> 	;
   103 00011DC5 668B4E20            <1> 	mov	cx, [esi+LD_BPB+Heads]
   104                              <1> 	;sub	dx, dx
   105                              <1> 	; 25/07/2022
   106 00011DC9 29D2                <1> 	sub	edx, edx
   107 00011DCB F7F1                <1> 	div	ecx			; Convert track to head & cyl
   108                              <1> 	; eax (ax) = cylinder, dx (dl) = head (max. FFh)
   109 00011DCD 88D6                <1> 	mov	dh, dl
   110                              <1> 	;pop	cx			; AX=Cyl, DH=Head, CX=Sector
   111                              <1> 	; 25/07/2022
   112 00011DCF 59                  <1> 	pop	ecx ; sector number (on track)
   113 00011DD0 8A5602              <1> 	mov	dl, [esi+LD_PhyDrvNo]
   114                              <1> 
   115 00011DD3 88C5                <1> 	mov	ch, al			; NOTE: max. 1023 cylinders !                   
   116 00011DD5 C0CC02              <1> 	ror	ah, 2			; Rotate 2 bits right
   117 00011DD8 08E1                <1> 	or	cl, ah
   118                              <1> 
   119                              <1> 	; 24/02/2016
   120                              <1> 	;pop	eax ; * (spt - sec) (example: 63 - 0 = 63)
   121                              <1> 	;cmp	eax, [sector_count]
   122                              <1> 	;jb	short chs_write_sectors
   123                              <1> 	;je	short chs_read_sectors
   124                              <1> 	;; (# of sectors to read is more than remaining sectors on the track)
   125                              <1> 	;mov	al, [sector_count]
   126                              <1> ;chs_read_sectors: ; read or write !
   127 00011DDA B001                <1> 	mov	al, 1 ; 25/02/2016
   128 00011DDC 8A25[F97F0100]      <1> 	mov	ah, [disk_rw_op]  ; 02h = chs read, 03h = chs write 
   129                              <1> 	;
   130 00011DE2 E8AE31FFFF          <1> 	call	int13h			; BIOS Service func ( ah ) = 2
   131                              <1>                                         ; Read disk sectors
   132                              <1>                                         ; AL-sec num CH-track CL-sec
   133                              <1>                                         ; DH-head DL-drive ES:BX-buffer
   134                              <1>                                         ; CF-flag AH-stat AL-sec read
   135                              <1> 	                                ; If CF = 1 then (If AH > 0)
   136 00011DE7 8825[FB7F0100]      <1> 	mov	[disk_rw_err], ah
   137                              <1> 	
   138 00011DED 59                  <1> 	pop	ecx
   139 00011DEE 58                  <1> 	pop	eax
   140 00011DEF 7314                <1> 	jnc	short chs_read_ok
   141                              <1> 
   142 00011DF1 803D[FB7F0100]09    <1> 	cmp	byte [disk_rw_err], 09h ; DMA crossed 64K segment boundary
   143 00011DF8 7408                <1> 	je	short chs_read_error_retn
   144                              <1>              
   145 00011DFA FE0D[FA7F0100]      <1> 	dec	byte [retry_count]
   146 00011E00 75B7                <1> 	jnz	short chs_read_retry
   147                              <1> 
   148                              <1> chs_read_error_retn:
   149 00011E02 F9                  <1> 	stc
   150                              <1> 	;retn
   151 00011E03 EB67                <1> 	jmp	short update_drv_error_byte
   152                              <1> 
   153                              <1> ;chs_write_sectors: ; read or write 
   154                              <1> 	;; (# of sectors to read is less than remaining sectors on the track)
   155                              <1> 	;mov	[sector_count], al
   156                              <1> 	;jmp	short chs_read_sectors
   157                              <1> 
   158                              <1> chs_read_ok:
   159                              <1> 	;; 23/02/2016
   160                              <1> 	;movzx	edx, byte [sector_count] ; sector count (<= spt)	
   161                              <1>         ;sub    ecx, edx  ; remaining sector count
   162                              <1> 	;jna	short update_drv_error_byte	
   163                              <1> 	;add	eax, edx ; next disk sector
   164                              <1> 	;shl	edx, 9 ; 512 * sector count
   165                              <1> 	;add	ebx, edx ; next buffer byte address 
   166                              <1>         ;jmp	chs_read_next_sector        
   167                              <1> 	; 25/02/2016
   168 00011E05 40                  <1> 	inc	eax ; next sector
   169 00011E06 81C300020000        <1> 	add	ebx, 512
   170 00011E0C E2A4                <1> 	loop	chs_read_next_sector
   171 00011E0E EB5C                <1> 	jmp	short update_drv_error_byte
   172                              <1> 
   173                              <1> lba_write:
   174                              <1> 	; 23/02/2016
   175 00011E10 C605[F97F0100]1C    <1> 	mov	byte [disk_rw_op], 1Ch ; LBA write
   176 00011E17 EB07                <1> 	jmp	short lba_rw
   177                              <1> 
   178                              <1> lba_read:
   179                              <1> 	; 14/07/2022
   180                              <1> 	; 23/02/2016
   181                              <1> 	; 17/02/2016
   182                              <1> 	; 14/02/2016
   183                              <1> 	; 13/02/2016
   184                              <1> 	; 31/01/2016 (TRDOS 386 = TRDOS v2.0)
   185                              <1> 	; 10/07/2015 (Retro UNIX 386 v1)
   186                              <1> 	;
   187                              <1> 	; INPUT -> EAX = Logical Block Address
   188                              <1> 	;	   ESI = Logical Dos Disk Table Offset (DRV)	
   189                              <1> 	;	   ECX = Sector Count	
   190                              <1> 	; 	   EBX = Destination Buffer
   191                              <1> 	; OUTPUT -> 
   192                              <1> 	;	   cf = 0 or cf = 1
   193                              <1> 	; (Modified registers: EAX, EBX, ECX, EDX)
   194                              <1> 
   195                              <1> 	; LBA read/write (with private LBA function) 
   196                              <1> 	;((Retro UNIX 386 v1 - DISK I/O code by Erdogan Tan))
   197                              <1> 
   198                              <1> 	; 23/02/2016
   199 00011E19 C605[F97F0100]1B    <1> 	mov	byte [disk_rw_op], 1Bh ; LBA read
   200                              <1> 
   201                              <1> lba_rw:
   202                              <1> 	; 17/02/2016
   203 00011E20 57                  <1> 	push	edi
   204                              <1> 
   205 00011E21 890D[FC7F0100]      <1> 	mov	[sector_count], ecx ; total sector (read) count
   206                              <1> 
   207 00011E27 8A5602              <1> 	mov	dl, [esi+LD_PhyDrvNo]
   208                              <1> 	; dl = physical drive number (0,1, 80h, 81h, 82h, 83h)
   209                              <1> 
   210                              <1> lba_read_next:
   211                              <1> 	; 14/07/2022
   212 00011E2A BF00010000          <1> 	mov	edi, 256
   213 00011E2F 39F9                <1> 	cmp	ecx, edi
   214                              <1> 	;cmp	ecx, 256
   215 00011E31 7602                <1> 	jna	short lba_read_rsc
   216                              <1> 	;mov	ecx, 256 ; 17/02/2016
   217 00011E33 89F9                <1> 	mov	ecx, edi
   218                              <1> lba_read_rsc:
   219 00011E35 290D[FC7F0100]      <1> 	sub	[sector_count], ecx ; remain sectors
   220                              <1> 
   221 00011E3B 89CF                <1> 	mov	edi, ecx 
   222 00011E3D 89C1                <1> 	mov	ecx, eax ; sector number/address
   223                              <1> 
   224 00011E3F C605[FA7F0100]04    <1> 	mov	byte [retry_count], 4
   225                              <1> lba_read_retry:
   226 00011E46 89F8                <1> 	mov	eax, edi
   227                              <1> 	;
   228                              <1> 	; ecx = sector number
   229                              <1> 	; al = sector count (0 - 255) /// (0 = 256)
   230                              <1> 	; dl = drive number
   231                              <1> 	; ebx = buffer offset
   232                              <1> 	;
   233                              <1> 	; Function 1Bh = LBA read, 1Ch = LBA write
   234                              <1> 	; 23/02/2016
   235 00011E48 8A25[F97F0100]      <1> 	mov	ah, [disk_rw_op] ; 1Bh = LBA read, 1Ch = LBA write
   236 00011E4E E84231FFFF          <1> 	call	int13h
   237                              <1> 	; al = ? (changed)
   238                              <1> 	; ah = error code
   239 00011E53 8825[FB7F0100]      <1> 	mov	[disk_rw_err], ah
   240 00011E59 7332                <1> 	jnc	short lba_read_ok
   241 00011E5B 80FC80              <1> 	cmp	ah, 80h ; time out?
   242 00011E5E 740A                <1>         je      short lba_read_stc_retn
   243 00011E60 FE0D[FA7F0100]      <1> 	dec	byte [retry_count]
   244 00011E66 7FDE                <1> 	jg	short lba_read_retry
   245 00011E68 7438                <1> 	jz	short lba_read_reset
   246                              <1> 	; sf = 1
   247                              <1> 
   248                              <1> lba_read_stc_retn:
   249 00011E6A F9                  <1> 	stc
   250                              <1> lba_read_retn:
   251 00011E6B 5F                  <1> 	pop	edi
   252                              <1> 
   253                              <1> update_drv_error_byte:
   254 00011E6C 9C                  <1> 	pushf
   255 00011E6D 53                  <1> 	push	ebx
   256                              <1> 	;push	cx
   257 00011E6E 51                  <1> 	push	ecx ; 14/07/2022
   258                              <1> 	;or	ecx, ecx
   259                              <1> 	;jz	short udrv_errb0
   260 00011E6F 8A0D[FB7F0100]      <1> 	mov	cl, [disk_rw_err]
   261                              <1> udrv_errb0:
   262 00011E75 0FB65E02            <1> 	movzx	ebx, byte [esi+LD_PhyDrvNo]
   263 00011E79 80FB02              <1> 	cmp	bl, 2
   264 00011E7C 7203                <1>         jb      short udrv_errb1
   265 00011E7E 80EB7E              <1> 	sub	bl, 7Eh
   266                              <1> 	;cmp	bl, 5
   267                              <1> 	;ja	short udrv_errb2	
   268                              <1> udrv_errb1:
   269 00011E81 81C3[A5650000]      <1>         add     ebx, drv.error ; 13/02/2016
   270 00011E87 880B                <1> 	mov	[ebx], cl ; error code
   271                              <1> udrv_errb2:
   272                              <1> 	;pop	cx
   273 00011E89 59                  <1> 	pop	ecx  ; 14/07/2022
   274 00011E8A 5B                  <1> 	pop	ebx
   275 00011E8B 9D                  <1> 	popf
   276 00011E8C C3                  <1> 	retn
   277                              <1> 
   278                              <1> lba_read_ok:
   279 00011E8D 89C8                <1> 	mov	eax, ecx ; sector number
   280 00011E8F 01F8                <1> 	add	eax, edi ; sector number (next)
   281 00011E91 C1E709              <1> 	shl	edi, 9 ; sector count * 512
   282 00011E94 01FB                <1> 	add	ebx, edi ; next buffer offset
   283                              <1> 
   284 00011E96 8B0D[FC7F0100]      <1> 	mov	ecx, [sector_count] ; remaining sectors
   285 00011E9C 09C9                <1> 	or	ecx, ecx
   286 00011E9E 758A                <1> 	jnz	short lba_read_next
   287 00011EA0 EBC9                <1> 	jmp	short lba_read_retn
   288                              <1> 
   289                              <1> lba_read_reset:
   290 00011EA2 B40D                <1> 	mov	ah, 0Dh ; Alternate reset
   291 00011EA4 E8EC30FFFF          <1>         call	int13h
   292                              <1> 	; al = ? (changed)
   293                              <1> 	; ah = error code
   294 00011EA9 739B                <1> 	jnc	short lba_read_retry
   295 00011EAB EBBE                <1> 	jmp	short lba_read_retn
  3314                                  %include 'trdosk8.s' ; 24/01/2016
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.7) - MAIN PROGRAM : trdosk8.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 26/11/2023  (Previous: 09/08/2022)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 24/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    11                              <1> ; u0.s (20/11/2015), u4.s (14/10/2015)
    12                              <1> ; ****************************************************************************
    13                              <1> ; Derived from TRDOS Operating System v1.0 (8086) source code by Erdogan Tan
    14                              <1> ; TRDOS2.ASM (09/11/2011)
    15                              <1> ; ----------------------------------------------------------------------------
    16                              <1> ; DIR.ASM (c) 2004-2011 Erdogan TAN  [07/01/2004] Last Update: 09/10/2011
    17                              <1> 
    18                              <1> set_run_sequence:
    19                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
    20                              <1> 	; 23/12/2016
    21                              <1> 	; 10/06/2016
    22                              <1> 	; 22/05/2016
    23                              <1> 	; 20/05/2016
    24                              <1> 	; 19/05/2016 - TRDOS 386 (TRDOS v2.0)
    25                              <1> 	; TRDOS 386 feature only !
    26                              <1> 	;
    27                              <1> 	; INPUT ->
    28                              <1> 	;	AL = process number (next process)
    29                              <1> 	;
    30                              <1> 	;	this process must be added to run sequence
    31                              <1> 	;
    32                              <1> 	;	[u.pri] = priority of present process
    33                              <1> 	;
    34                              <1> 	;	DL = priority (queue)
    35                              <1> 	;	     0 = background (low) ; run on background 
    36                              <1> 	;	     1 = regular (normal) ; run as regular
    37                              <1> 	;	     2 = event (high)     ; run for event
    38                              <1> 	;
    39                              <1> 	;	1) If the requested process is already running:
    40                              <1> 	;	   a) If present priority is high ([u.pri]=2) 
    41                              <1> 	;	      and requested priority is also high, 
    42                              <1> 	;	      there is nothing to do! Because it has been
    43                              <1> 	;	      done already (before this attempt).		 	
    44                              <1> 	;	   b) If present priority is high ([u.pri]=2)
    45                              <1> 	;	      and requested priority is not high, there is
    46                              <1> 	;	      nothing to do! Because, it's current
    47                              <1> 	;	      run queue is unspecified, here. (It may be in
    48                              <1> 	;	      a waiting list or in a run queue; if the new
    49                              <1> 	;	      priority would be used to add it to relavant
    50                              <1>         ;             run queue, this would be wrong, unnecessary
    51                              <1> 	;	      and destabilizing duplication!)
    52                              <1> 	;	   c) If present priority is not high ([u.pri]<2)
    53                              <1>         ;             and requested priority is high (event),
    54                              <1> 	;	      process will be added to present priority's
    55                              <1> 	;	      run queue and then, priority will be changed
    56                              <1> 	;	      to high ([u.pri]=2).
    57                              <1> 	;	   d) If present priority is not high ([u.pri]<2)
    58                              <1> 	;	      and requested priority is not high, [u.pri]
    59                              <1> 	;	      value will be changed. There is nothing to do
    60                              <1> 	;	      in addition. (The new priority value will be
    61                              <1> 	;	      used by 'tswap/tswitch' procedure at 'sysret'
    62                              <1> 	;	      or 'sysrele' stage.)
    63                              <1> 	;
    64                              <1> 	;	2) If the requested process is not running:
    65                              <1> 	;	   a) If requested priority of the requested
    66                              <1> 	;	      (next) process is high (event) and priority
    67                              <1> 	;	      of present process is not high, the requested
    68                              <1> 	;	      process will be added to ('runq_event') high
    69                              <1> 	;	      priority run queue and then present (running)
    70                              <1> 	;	      process will be stopped (swapped/switched out)
    71                              <1> 	;	      immediately if it is in user mode, or it's 
    72                              <1> 	;	      [u.quant] value will be reset to 0 and (then) 
    73                              <1> 	;	      it will be stopped at 'sysret' stage.			
    74                              <1> 	;	   b) If requested priority of the requested
    75                              <1> 	;	      (next) process is high (event) and priority
    76                              <1> 	;	      of present process is also high, the requested
    77                              <1> 	;	      process will be added to ('runq_event') high
    78                              <1> 	;	      priority run queue and present (running) 
    79                              <1> 	;	      process will be allowed to run until it's 
    80                              <1> 	;	      time quantum will be elapsed ([u.quant]=0).	
    81                              <1> 	;	   c) If requested priority of the requested
    82                              <1> 	;	      (next) process is not high ('run for event'), 
    83                              <1> 	;	      there is nothing to do. Because, it's current
    84                              <1> 	;	      run queue is unspecified, here. (It may be in
    85                              <1> 	;	      a waiting list or in a run queue; if the new
    86                              <1> 	;	      priority would be used to add it to relavant
    87                              <1>         ;             run queue, this would be wrong, unnecessary
    88                              <1> 	;	      and destabilizing duplication!) 
    89                              <1> 	;
    90                              <1> 	; OUTPUT ->
    91                              <1> 	;	none
    92                              <1> 	;
    93                              <1> 	;	[u.pri] = priority of present process
    94                              <1> 	;
    95                              <1> 	;	cf = 1, if the request could not be fulfilled.
    96                              <1> 	;			 	     	  
    97                              <1> 	;	NOTE: 
    98                              <1>         ;          * Processes in 'run as regular' queue can run
    99                              <1> 	;	     if there is no process in 'run for event' queue
   100                              <1> 	;	     ('run for event' processes have higher priority)	 		 
   101                              <1> 	;	   * When [u.quant] time quantum of a process is
   102                              <1> 	;	     elapsed, it's high priority ('run for event')
   103                              <1> 	;	     status will be disabled, it can be run in sequence
   104                              <1> 	;	     of it's actual run queue.
   105                              <1> 	;	   * A 'run on background' process will always be 
   106                              <1> 	;	     sequenced in 'run on background' (low priority)
   107                              <1> 	;	     queue, it can run only when other priority queues
   108                              <1> 	;	     are empty. (idle time processes, e.g. printing)  	 	
   109                              <1> 	;
   110                              <1> 	; Modified registers: eax, ebx, edx
   111                              <1> 	;
   112                              <1> 
   113                              <1> srunseq_0:
   114 00011EAD 3A05[6D010300]      <1>         cmp     al, [u.uno]     ; same process ?
   115 00011EB3 750C                <1> 	jne	short srunseq_2 ; no
   116                              <1> 
   117 00011EB5 8A25[66010300]      <1> 	mov	ah, [u.pri] 	; present/current priority
   118 00011EBB 80FC02              <1> 	cmp	ah, 2       	; 'run for event' priority level
   119 00011EBE 7220                <1> 	jb	short srunseq_6 ; no
   120                              <1> 
   121                              <1> srunseq_1:
   122                              <1> 	; there is nothing to do!
   123 00011EC0 C3                  <1> 	retn
   124                              <1> 
   125                              <1> srunseq_2:
   126                              <1> 	;;this not necessary ! 23/12/2016
   127                              <1>         ;;cmp	al, nproc	; number of processes = 16 
   128                              <1> 	;;jnb	short srunseq_5	; error ! invalid process number 
   129                              <1> 
   130                              <1> 	; dl = priority
   131 00011EC1 80FA02              <1> 	cmp	dl, 2 		; event queue
   132 00011EC4 72FA                <1> 	jb	short srunseq_1 ; requested process is not present
   133                              <1> 				; process and priority of requested
   134                              <1> 				; process is not high (event), 
   135                              <1> 				; there is nothing to do!
   136                              <1> 	
   137                              <1> 	; requested process is not present process
   138                              <1> 	; & priority of requested process is high
   139 00011EC6 3A15[66010300]      <1> 	cmp	dl, [u.pri] 	; priority of present process
   140 00011ECC 7606                <1> 	jna	short srunseq_3 ; is high, also
   141                              <1> 	;
   142                              <1> 	; present process will be swapped/switched out
   143 00011ECE FE05[D5830100]      <1> 	inc	byte [p_change] ; 1
   144                              <1> 
   145                              <1> srunseq_3:
   146                              <1> 	; add process to 'runq_event' queue for new event
   147 00011ED4 BB[0A010300]        <1> 	mov	ebx, runq_event ; high priority run queue
   148                              <1> 
   149                              <1> srunseq_4:
   150                              <1> 	; al = process number
   151                              <1> 	; ebx = run queue
   152                              <1> 	;call	putlu
   153                              <1> 	;retn
   154                              <1> 	; 29/07/2022
   155 00011ED9 E9F7EDFFFF          <1> 	jmp	putlu
   156                              <1> 
   157                              <1> srunseq_5:
   158 00011EDE F5                  <1> 	cmc
   159 00011EDF C3                  <1> 	retn
   160                              <1> 
   161                              <1> srunseq_6:
   162                              <1> 	; present priority of the process is not high
   163                              <1> 	
   164 00011EE0 8815[66010300]      <1> 	mov	[u.pri], dl ; new priority 
   165                              <1> 			    ; (will be used by 'tswap')
   166                              <1> 
   167 00011EE6 80FA02              <1> 	cmp	dl, 2 		; high priority ?
   168 00011EE9 72F3                <1> 	jb	short srunseq_5 ; no, there is nothing to do
   169                              <1> 				; in addition
   170                              <1> 
   171                              <1> 	; process must be added to relevant run queue, here!
   172                              <1> 	; (new priority is high/event priority and process
   173                              <1> 	; will not be added to a run queue by 'tswap')
   174                              <1> 
   175 00011EEB BB[0C010300]        <1> 	mov	ebx, runq_normal ; 'run as regular' queue
   176                              <1> 
   177 00011EF0 20E4                <1> 	and	ah, ah  ;  previous value of [u.pri]
   178 00011EF2 75E5                <1> 	jnz	short srunseq_4
   179                              <1> 
   180 00011EF4 43                  <1> 	inc	ebx
   181 00011EF5 43                  <1> 	inc	ebx
   182                              <1> 	; ebx = runq_background ; 'run on backgroud' queue 
   183                              <1> 
   184 00011EF6 EBE1                <1> 	jmp	short srunseq_4
   185                              <1> clock:
   186                              <1> 	; 23/05/2016
   187                              <1> 	; 22/05/2016
   188                              <1> 	; 20/05/2016
   189                              <1> 	; 19/05/2016 - TRDOS 386 (TRDOS v2.0)
   190                              <1> 	; 14/05/2015 - 14/10/2015 (Retro UNIX 386 v1)
   191                              <1> 	; 07/12/2013 - 10/04/2014 (Retro UNIX 8086 v1)
   192                              <1> 
   193 00011EF8 803D[64010300]00    <1> 	cmp	byte [u.quant], 0
   194 00011EFF 772C                <1> 	ja	short clk_1
   195                              <1> 	;
   196 00011F01 803D[6D010300]01    <1> 	cmp     byte [u.uno], 1 ; /etc/init ? (for Retro UNIX 8086 & 386 v1)
   197                              <1> 				; MainProg (Kernel's Command Interpreter)
   198                              <1> 				; for TRDOS 386.
   199 00011F08 7623                <1> 	jna	short clk_1 ; yes, do not swap out
   200                              <1> 	;
   201 00011F0A 803D[10010300]FF    <1> 	cmp     byte [sysflg], 0FFh ; user or system space ?
   202 00011F11 7520                <1> 	jne	short clk_2 	    ; system space (sysflg <> 0FFh)
   203                              <1> 	;
   204 00011F13 66833D[68010300]00  <1> 	cmp	word [u.intr], 0
   205 00011F1B 7616                <1> 	jna	short clk_2
   206                              <1> 	;
   207                              <1> 	; 23/05/2016
   208 00011F1D 803D[D6830100]00    <1> 	cmp	byte [multi_tasking], 0
   209 00011F24 760D                <1> 	jna	short clk_2
   210                              <1> 	;
   211 00011F26 FE05[D5830100]      <1> 	inc	byte [p_change] ; it is time to change running process	
   212 00011F2C C3                  <1> 	retn
   213                              <1> clk_1:
   214 00011F2D FE0D[64010300]      <1> 	dec	byte [u.quant]
   215                              <1> clk_2:
   216 00011F33 C3                  <1> 	retn   ; return to (hardware) timer interrupt routine
   217                              <1> 
   218                              <1> ; 12/10/2017
   219                              <1> ; 15/01/2017
   220                              <1> ; 14/01/2017
   221                              <1> ; 07/01/2017
   222                              <1> ; 02/01/2017
   223                              <1> ; 17/08/2016
   224                              <1> ; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
   225                              <1> int34h: ; #IOCTL# (I/O port access support for ring 3)
   226                              <1> 	;
   227                              <1> 	; 23/05/2016
   228                              <1> 	; 20/06/2016
   229                              <1> 	; 29/04/2016 - TRDOS 386 (TRDOS v2.0)
   230                              <1> 	;
   231                              <1> 	; INPUT ->
   232                              <1> 	;	AH = 0 -> read port  (physical IO port) -byte-
   233                              <1> 	;	AH = 1 -> write port (physical IO port) -byte-
   234                              <1> 	;		AL = data byte
   235                              <1> 	;	AH = 2 -> read port  (physical IO port) -word-
   236                              <1> 	;	AH = 3 -> write port (physical IO port) -word-
   237                              <1> 	;		BX = data word
   238                              <1> 	;	AH = 4 -> read port  (physical IO port) -dword-
   239                              <1> 	;	AH = 5 -> write port (physical IO port) -dword-
   240                              <1> 	;		EBX = data dword
   241                              <1> 	;	; 12/10/2017
   242                              <1> 	;	AH = 6 -> read port (physical IO port) twice -byte-
   243                              <1> 	;	AH = 7 -> write port (physical IO port) twice -byte-
   244                              <1> 	;		BX = data word	
   245                              <1> 	;
   246                              <1> 	;	DX = Port number (<= 0FFFFh)
   247                              <1> 	;
   248                              <1> 	; OUTPUT ->
   249                              <1> 	;	AL = data byte (in al, dx)
   250                              <1> 	;	AX = data word (in ax, dx)
   251                              <1> 	;	EAX = data dword (in eax, dx)
   252                              <1> 	;
   253                              <1> 	;	(ECX = actual TRANSFER COUNT for string functions)
   254                              <1> 	;
   255                              <1> 	;
   256                              <1> 	; Modified registers: EAX
   257                              <1> 	;
   258                              <1> 
   259                              <1> 	;cmp	ah, 5
   260                              <1> 	;ja	short int34h_5 ; invalid function !
   261                              <1> 
   262                              <1> 	; 12/10/2017
   263 00011F34 80FC07              <1> 	cmp	ah, 7
   264 00011F37 7743                <1> 	ja	short int34h_5 ; invalid function !
   265                              <1> 
   266                              <1> 	;; 15/01/2017
   267                              <1> 	; 14/01/2017
   268                              <1> 	; 02/01/2017
   269                              <1> 	;;mov	byte [ss:intflg], 34h	; IOCTL interrupt 
   270 00011F39 FB                  <1> 	sti
   271                              <1> 	
   272                              <1> 	;sti	; enable interrupts
   273 00011F3A 80642408FE          <1> 	and	byte [esp+8], 11111110b	; clear carry bit of eflags register
   274                              <1> 
   275 00011F3F 80FC01              <1> 	cmp	ah, 1
   276 00011F42 7205                <1> 	jb	short int34h_0
   277 00011F44 7705                <1> 	ja	short int34h_1
   278                              <1> 
   279 00011F46 EE                  <1> 	out	dx, al
   280                              <1> 	;iretd
   281 00011F47 EB01                <1> 	jmp	short int34h_iret
   282                              <1> 
   283                              <1> int34h_0:
   284 00011F49 EC                  <1> 	in	al, dx
   285                              <1> 	;iretd
   286                              <1> int34h_iret:
   287                              <1> 	;cli	; 07/01/2017
   288                              <1> 	;; 15/01/2017
   289                              <1> 	;;mov	byte [ss:intflg], 0 ; reset
   290 00011F4A CF                  <1> 	iretd 
   291                              <1> 
   292                              <1> int34h_1:
   293 00011F4B F6C401              <1> 	test	ah, 1
   294 00011F4E 7516                <1> 	jnz	short int34h_3 ; out
   295                              <1> 
   296                              <1> 	; in
   297 00011F50 80FC02              <1> 	cmp	ah, 2
   298 00011F53 7707                <1> 	ja	short int34h_2
   299                              <1> 
   300 00011F55 6689D8              <1> 	mov	ax, bx
   301 00011F58 66ED                <1> 	in	ax, dx
   302                              <1> 	;iretd
   303 00011F5A EBEE                <1> 	jmp	short int34h_iret
   304                              <1> 
   305                              <1> int34h_2:
   306 00011F5C 80FC04              <1> 	cmp	ah, 4
   307 00011F5F 772C                <1> 	ja	short int34h_7	; 12/10/2017
   308                              <1> 	; ah = 4
   309 00011F61 89D8                <1> 	mov	eax, ebx
   310 00011F63 ED                  <1> 	in	eax, dx
   311                              <1> 	;iretd
   312 00011F64 EBE4                <1> 	jmp	short int34h_iret
   313                              <1> 
   314                              <1> int34h_3:
   315 00011F66 80FC03              <1> 	cmp	ah, 3
   316 00011F69 7707                <1> 	ja	short int34h_4
   317                              <1> 
   318 00011F6B 6689D8              <1> 	mov	ax, bx
   319 00011F6E 66EF                <1> 	out	dx, ax
   320                              <1> 	;iretd
   321 00011F70 EBD8                <1> 	jmp	short int34h_iret
   322                              <1> 
   323                              <1> int34h_4:
   324 00011F72 80FC05              <1> 	cmp	ah, 5
   325 00011F75 770B                <1> 	ja	short int34h_6	; 12/10/2017
   326                              <1> 	; ah = 5
   327 00011F77 89D8                <1> 	mov	eax, ebx
   328 00011F79 EF                  <1> 	out	dx, eax
   329                              <1> 	;iretd
   330 00011F7A EBCE                <1> 	jmp	short int34h_iret
   331                              <1> 
   332                              <1> int34h_5:
   333 00011F7C 804C240801          <1> 	or	byte [esp+8], 1	; set carry bit of eflags register
   334 00011F81 CF                  <1> 	iretd
   335                              <1> 
   336                              <1> 	; 12/10/2017
   337                              <1> int34h_6:
   338 00011F82 6689D8              <1> 	mov	ax, bx
   339 00011F85 EE                  <1> 	out	dx, al
   340 00011F86 EB00                <1> 	jmp	short $+2
   341 00011F88 86E0                <1> 	xchg	ah, al
   342 00011F8A EE                  <1> 	out	dx, al
   343                              <1> 	;xchg	al, ah
   344                              <1> 	;iretd
   345 00011F8B EB06                <1> 	jmp	short int34h_8
   346                              <1> int34h_7:
   347 00011F8D EC                  <1> 	in	al, dx
   348 00011F8E EB00                <1> 	jmp	short $+2
   349 00011F90 88C4                <1> 	mov	ah, al
   350 00011F92 EC                  <1> 	in	al, dx
   351                              <1> int34h_8:
   352 00011F93 86C4                <1> 	xchg	al, ah
   353 00011F95 CF                  <1> 	iretd
   354                              <1> 			
   355                              <1> INT4Ah:
   356                              <1> 	; 24/01/2016
   357                              <1> 	; this procedure will be called by 'RTC_INT' (in 'timer.s')
   358 00011F96 C3                  <1> 	retn
   359                              <1> 
   360                              <1> ; u0.s
   361                              <1> ; Retro UNIX 386 v1 Kernel (v0.2) - SYS0.INC
   362                              <1> ; Last Modification: 20/11/2015
   363                              <1> 
   364                              <1> com2_int:
   365                              <1> 	; 07/11/2015 
   366                              <1> 	; 24/10/2015
   367                              <1> 	; 23/10/2015
   368                              <1> 	; 14/03/2015 (Retro UNIX 386 v1 - Beginning)
   369                              <1> 	; 28/07/2014 (Retro UNIX 8086 v1)
   370                              <1> 	; < serial port 2 interrupt handler >
   371                              <1> 	;
   372 00011F97 890424              <1> 	mov 	[esp], eax ; overwrite call return address
   373                              <1> 	;push	eax
   374 00011F9A 66B80900            <1> 	mov	ax, 9
   375 00011F9E EB07                <1> 	jmp	short comm_int
   376                              <1> com1_int:
   377                              <1> 	; 07/11/2015
   378                              <1> 	; 24/10/2015
   379 00011FA0 890424              <1> 	mov 	[esp], eax ; overwrite call return address
   380                              <1> 	; 23/10/2015
   381                              <1> 	;push	eax
   382 00011FA3 66B80800            <1> 	mov	ax, 8
   383                              <1> comm_int:
   384                              <1> 	; 20/11/2015
   385                              <1> 	; 18/11/2015
   386                              <1> 	; 17/11/2015
   387                              <1> 	; 16/11/2015
   388                              <1> 	; 09/11/2015
   389                              <1> 	; 08/11/2015
   390                              <1> 	; 07/11/2015
   391                              <1> 	; 06/11/2015 (serial4.asm, 'serial')	
   392                              <1> 	; 01/11/2015
   393                              <1> 	; 26/10/2015
   394                              <1> 	; 23/10/2015
   395 00011FA7 53                  <1> 	push	ebx
   396 00011FA8 56                  <1> 	push	esi
   397 00011FA9 57                  <1> 	push	edi
   398 00011FAA 1E                  <1> 	push 	ds
   399 00011FAB 06                  <1> 	push 	es
   400                              <1> 	; 18/11/2015
   401 00011FAC 0F20DB              <1> 	mov	ebx, cr3
   402 00011FAF 53                  <1> 	push	ebx ; ****
   403                              <1> 	;
   404 00011FB0 51                  <1> 	push	ecx ; ***
   405 00011FB1 52                  <1> 	push	edx ; **
   406                              <1> 	;
   407 00011FB2 BB10000000          <1> 	mov	ebx, KDATA
   408 00011FB7 8EDB                <1> 	mov	ds, bx
   409 00011FB9 8EC3                <1> 	mov	es, bx
   410                              <1> 	;
   411 00011FBB 8B0D[48770100]      <1> 	mov	ecx, [k_page_dir]
   412 00011FC1 0F22D9              <1> 	mov	cr3, ecx
   413                              <1> 	; 20/11/2015
   414                              <1> 	; Interrupt identification register
   415 00011FC4 66BAFA02            <1> 	mov	dx, 2FAh ; COM2
   416                              <1> 	;
   417 00011FC8 3C08                <1> 	cmp 	al, 8 
   418 00011FCA 7702                <1> 	ja 	short com_i0
   419                              <1> 	;
   420                              <1> 	; 20/11/2015
   421                              <1> 	; 17/11/2015
   422                              <1> 	; 16/11/2015
   423                              <1> 	; 15/11/2015
   424                              <1> 	; 24/10/2015
   425                              <1> 	; 14/03/2015 (Retro UNIX 386 v1 - Beginning)
   426                              <1> 	; 28/07/2014 (Retro UNIX 8086 v1)
   427                              <1> 	; < serial port 1 interrupt handler >
   428                              <1> 	;
   429 00011FCC FEC6                <1> 	inc	dh ; 3FAh ; COM1 Interrupt id. register
   430                              <1> com_i0:
   431                              <1> 	;push	eax ; *
   432                              <1> 	; 07/11/2015
   433 00011FCE A2[B2770100]        <1> 	mov 	byte [ccomport], al
   434                              <1> 	; 09/11/2015
   435 00011FD3 0FB7D8              <1> 	movzx	ebx, ax ; 8 or 9
   436                              <1> 	; 17/11/2015
   437                              <1>  	; reset request for response status
   438 00011FD6 88A3[A8770100]      <1> 	mov	[ebx+req_resp-8], ah ; 0
   439                              <1> 	;
   440                              <1> 	; 20/11/2015
   441 00011FDC EC                  <1> 	in	al, dx		; read interrupt id. register
   442 00011FDD EB00                <1> 	JMP	$+2	   	; I/O DELAY
   443 00011FDF 2404                <1> 	and	al, 4		; received data available?	
   444 00011FE1 7470                <1> 	jz	short com_eoi	; (transmit. holding reg. empty)
   445                              <1> 	;
   446                              <1> 	; 20/11/2015
   447 00011FE3 80EA02              <1> 	sub	dl, 3FAh-3F8h	; data register (3F8h, 2F8h)
   448 00011FE6 EC                  <1> 	in	al, dx     	; read character
   449                              <1> 	;JMP	$+2	   	; I/O DELAY
   450                              <1> 	; 08/11/2015
   451                              <1> 	; 07/11/2015
   452 00011FE7 89DE                <1> 	mov	esi, ebx 
   453 00011FE9 89DF                <1> 	mov	edi, ebx
   454 00011FEB 81C6[AC770100]      <1> 	add 	esi, rchar - 8 ; points to last received char
   455 00011FF1 81C7[AE770100]      <1> 	add	edi, schar - 8 ; points to last sent char
   456 00011FF7 8806                <1> 	mov	[esi], al ; received char (current char)
   457                              <1> 	; query
   458 00011FF9 20C0                <1> 	and	al, al
   459 00011FFB 7527                <1> 	jnz	short com_i2
   460                              <1>    	; response
   461                              <1> 	; 17/11/2015
   462                              <1> 	; set request for response status
   463 00011FFD FE83[A8770100]      <1>         inc     byte [ebx+req_resp-8] ; 1 
   464                              <1> 	;
   465 00012003 6683C205            <1> 	add	dx, 3FDh-3F8h	; (3FDh, 2FDh)
   466 00012007 EC                  <1> 	in	al, dx	   	; read line status register 
   467 00012008 EB00                <1> 	JMP	$+2	   	; I/O DELAY
   468 0001200A 2420                <1> 	and	al, 20h	   	; transmitter holding reg. empty?
   469 0001200C 7445                <1> 	jz	short com_eoi 	; no
   470 0001200E B0FF                <1> 	mov 	al, 0FFh   	; response			
   471 00012010 6683EA05            <1> 	sub	dx, 3FDh-3F8h 	; data port (3F8h, 2F8h)
   472 00012014 EE                  <1> 	out	dx, al	   	; send on serial port
   473                              <1> 	; 17/11/2015
   474 00012015 803F00              <1> 	cmp 	byte [edi], 0   ; query ? (schar)
   475 00012018 7502                <1> 	jne 	short com_i1    ; no
   476 0001201A 8807                <1> 	mov	[edi], al 	; 0FFh (responded)
   477                              <1> com_i1:
   478                              <1> 	; 17/11/2015
   479                              <1> 	; reset request for response status (again)
   480 0001201C FE8B[A8770100]      <1>         dec     byte [ebx+req_resp-8] ; 0 
   481 00012022 EB2F                <1> 	jmp	short com_eoi
   482                              <1> com_i2:	
   483                              <1> 	; 08/11/2015
   484 00012024 3CFF                <1> 	cmp 	al, 0FFh	; (response ?)
   485 00012026 7417                <1> 	je	short com_i3	; (check for response signal)
   486                              <1> 	; 07/11/2015
   487 00012028 3C04                <1> 	cmp	al, 04h	; EOT
   488 0001202A 751C                <1> 	jne	short com_i4	
   489                              <1> 	; EOT = 04h (End of Transmit) - 'CTRL + D'
   490                              <1> 	;(an EOT char is supposed as a ctrl+brk from the terminal)
   491                              <1> 	; 08/11/2015
   492                              <1> 		; ptty -> tty 0 to 7 (pseudo screens)
   493 0001202C 861D[76770100]      <1> 	xchg	bl, [ptty]  ; tty number (8 or 9)
   494 00012032 E8F74CFFFF          <1> 	call 	ctrlbrk
   495 00012037 861D[76770100]      <1> 	xchg	[ptty], bl ; (restore ptty value and BL value)
   496                              <1> 	;mov	al, 04h ; EOT
   497                              <1> 	; 08/11/2015
   498 0001203D EB09                <1> 	jmp	short com_i4	
   499                              <1> com_i3:
   500                              <1> 	; 08/11/2015
   501                              <1> 	; If 0FFh has been received just after a query
   502                              <1> 	; (schar, ZERO), it is a response signal.
   503                              <1> 	; 17/11/2015
   504 0001203F 803F00              <1>         cmp     byte [edi], 0 ; query ? (schar)
   505 00012042 7704                <1> 	ja	short com_i4 ; no
   506                              <1> 	; reset query status (schar)
   507 00012044 8807                <1> 	mov	[edi], al ; 0FFh
   508 00012046 FEC0                <1> 	inc	al ; 0
   509                              <1> com_i4:
   510                              <1> 	; 27/07/2014
   511                              <1> 	; 09/07/2014
   512 00012048 D0E3                <1> 	shl	bl, 1	
   513 0001204A 81C3[78770100]      <1> 	add	ebx, ttychr
   514                              <1> 	; 23/07/2014 (always overwrite)
   515                              <1> 	;;cmp	word [ebx], 0
   516                              <1> 	;;ja	short com_eoi
   517                              <1> 	;
   518 00012050 668903              <1> 	mov	[ebx], ax   ; Save ascii code
   519                              <1> 			    ; scan code = 0
   520                              <1> com_eoi:
   521                              <1> 	;mov	al, 20h
   522                              <1> 	;out	20h, al	   ; end of interrupt
   523                              <1> 	;
   524                              <1> 	; 07/11/2015
   525                              <1>       	;pop	eax ; *
   526 00012053 A0[B2770100]        <1> 	mov	al, byte [ccomport] ; current COM port
   527                              <1> 	 ; al = tty number (8 or 9)
   528 00012058 E80F000000          <1>         call	wakeup
   529                              <1> com_iret:
   530                              <1> 	; 23/10/2015
   531 0001205D 5A                  <1> 	pop	edx ; **
   532 0001205E 59                  <1> 	pop	ecx ; ***
   533                              <1> 	; 18/11/2015
   534                              <1> 	;pop	eax ; ****
   535                              <1> 	;mov	cr3, eax
   536                              <1> 	;jmp	iiret
   537 0001205F E95CEDFEFF          <1> 	jmp	iiretp
   538                              <1> 
   539                              <1> ;iiretp: ; 01/09/2015
   540                              <1> ;	; 28/08/2015
   541                              <1> ;	pop	eax ; (*) page directory
   542                              <1> ;	mov	cr3, eax
   543                              <1> ;iiret:
   544                              <1> ;	; 22/08/2014
   545                              <1> ;	mov	al, 20h ; END OF INTERRUPT COMMAND TO 8259
   546                              <1> ;	out	20h, al	; 8259 PORT
   547                              <1> ;	;
   548                              <1> ;	pop	es
   549                              <1> ;	pop	ds
   550                              <1> ;	pop	edi
   551                              <1> ;	pop	esi
   552                              <1> ;	pop	ebx ; 29/08/2014
   553                              <1> ;	pop 	eax
   554                              <1> ;	iretd
   555                              <1> 
   556                              <1> ; 21/11/2023
   557                              <1> %if 0
   558                              <1> 
   559                              <1> sp_init:
   560                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
   561                              <1> 	; 07/11/2015
   562                              <1> 	; 29/10/2015
   563                              <1> 	; 26/10/2015
   564                              <1> 	; 23/10/2015
   565                              <1> 	; 29/06/2015
   566                              <1> 	; 14/03/2015 (Retro UNIX 386 v1 - 115200 baud)
   567                              <1> 	; 28/07/2014 (Retro UNIX 8086 v1 - 9600 baud)
   568                              <1> 	; Initialization of Serial Port Communication Parameters
   569                              <1> 	; (COM1 base port address = 3F8h, COM1 Interrupt = IRQ 4)
   570                              <1> 	; (COM2 base port address = 2F8h, COM1 Interrupt = IRQ 3)
   571                              <1> 	;
   572                              <1> 	; ((Modified registers: EAX, ECX, EDX, EBX))
   573                              <1> 	;
   574                              <1> 	; INPUT:  (29/06/2015)
   575                              <1> 	;	AL = 0 for COM1
   576                              <1> 	;	     1 for COM2
   577                              <1> 	;	AH = Communication parameters	
   578                              <1> 	;
   579                              <1> 	;  (*) Communication parameters (except BAUD RATE):
   580                              <1> 	;	Bit	4	3	2	1	0
   581                              <1> 	;		-PARITY--   STOP BIT  -WORD LENGTH-	 		 
   582                              <1> 	;  this one -->	00 = none    0 = 1 bit  11 = 8 bits
   583                              <1> 	;		01 = odd     1 = 2 bits	10 = 7 bits
   584                              <1> 	;		11 = even
   585                              <1> 	;  Baud rate setting bits: (29/06/2015)
   586                              <1> 	;		Retro UNIX 386 v1 feature only !
   587                              <1> 	;	Bit	7    6    5  | Baud rate
   588                              <1> 	;		------------------------
   589                              <1> 	;	value	0    0    0  | Default (Divisor = 1)
   590                              <1> 	;		0    0    1  | 9600 (12)
   591                              <1> 	;		0    1    0  | 19200 (6) 
   592                              <1> 	;		0    1	  1  | 38400 (3) 
   593                              <1> 	;		1    0	  0  | 14400 (8)
   594                              <1> 	;		1    0	  1  | 28800 (4)
   595                              <1> 	;		1    1    0  | 57600 (2)
   596                              <1> 	;		1    1    1  | 115200 (1) 	
   597                              <1> 	
   598                              <1> 	; References:	
   599                              <1> 	; (1) IBM PC-XT Model 286 BIOS Source Code
   600                              <1> 	;     RS232.ASM --- 10/06/1985 COMMUNICATIONS BIOS (RS232)
   601                              <1> 	; (2) Award BIOS 1999 - ATORGS.ASM
   602                              <1> 	; (3) http://wiki.osdev.org/Serial_Ports
   603                              <1> 	;
   604                              <1> 	; Set communication parameters for COM1 (= 03h)	
   605                              <1> 	;
   606                              <1> 	mov	ebx, com1p		; COM1 parameters  
   607                              <1> 	mov	dx, 3F8h		; COM1
   608                              <1> 	 ; 29/10/2015
   609                              <1> 	mov	cx, 301h  ; divisor = 1 (115200 baud)
   610                              <1> 	call	sp_i3	; call A4	
   611                              <1> 	test	al, 80h
   612                              <1> 	jz	short sp_i0 ; OK..
   613                              <1> 		; Error !
   614                              <1> 	;mov	dx, 3F8h
   615                              <1> 	sub	dl, 5 ; 3FDh -> 3F8h
   616                              <1> 	mov	cx, 30Eh  ; divisor = 12 (9600 baud)
   617                              <1> 	call	sp_i3	; call A4	
   618                              <1> 	test	al, 80h
   619                              <1> 	jnz	short sp_i1
   620                              <1> sp_i0:
   621                              <1>         ; (Note: Serial port interrupts will be disabled here...)	
   622                              <1>         ; (INT 14h initialization code disables interrupts.)
   623                              <1> 	;
   624                              <1> 	mov	byte [ebx], 0E3h ; 11100011b
   625                              <1> 	call	sp_i5 ; 29/06/2015
   626                              <1> sp_i1:
   627                              <1> 	inc	ebx
   628                              <1> 	mov	dx, 2F8h		; COM2
   629                              <1> 	 ; 29/10/2015
   630                              <1> 	mov	cx, 301h  ; divisor = 1 (115200 baud)
   631                              <1> 	call	sp_i3	; call A4	
   632                              <1> 	test	al, 80h
   633                              <1> 	jz	short sp_i2 ; OK..
   634                              <1> 		; Error !
   635                              <1> 	;mov	dx, 2F8h
   636                              <1> 	sub	dl, 5 ; 2FDh -> 2F8h
   637                              <1> 	mov	cx, 30Eh  ; divisor = 12 (9600 baud)
   638                              <1> 	call	sp_i3	; call A4	
   639                              <1> 	test	al, 80h
   640                              <1> 	jnz	short sp_i7
   641                              <1> sp_i2:
   642                              <1> 	mov	byte [ebx], 0E3h ; 11100011b
   643                              <1> sp_i6:
   644                              <1> 	;; COM2 - enabling IRQ 3
   645                              <1> 	; 29/07/2022
   646                              <1> 	; 07/11/2015
   647                              <1> 	; 26/10/2015
   648                              <1> 	pushf
   649                              <1> 	cli
   650                              <1> 	;
   651                              <1> 	mov	dx, 2FCh   		; modem control register
   652                              <1> 	in	al, dx 	   		; read register
   653                              <1> 	JMP	$+2	   		; I/O DELAY
   654                              <1> 	or	al, 8      		; enable bit 3 (OUT2)
   655                              <1> 	out	dx, al     		; write back to register
   656                              <1> 	JMP	$+2	   		; I/O DELAY
   657                              <1> 	;mov	dx, 2F9h   		; interrupt enable register
   658                              <1> 	; 29/07/2022
   659                              <1> 	mov	dl, 0F9h
   660                              <1> 	in	al, dx     		; read register
   661                              <1> 	JMP	$+2	   		; I/O DELAY
   662                              <1> 	;or	al, 1      		; receiver data interrupt enable and
   663                              <1> 	or	al, 3	   		; transmitter empty interrupt enable
   664                              <1> 	out	dx, al 	   		; write back to register
   665                              <1> 	JMP	$+2        		; I/O DELAY
   666                              <1> 	in	al, 21h    		; read interrupt mask register
   667                              <1> 	JMP	$+2	   		; I/O DELAY
   668                              <1> 	and	al, 0F7h   		; enable IRQ 3 (COM2)
   669                              <1> 	out	21h, al    		; write back to register
   670                              <1> 	;
   671                              <1> 	; 23/10/2015
   672                              <1> 	mov 	eax, com2_int
   673                              <1> 	mov	[com2_irq3], eax
   674                              <1> 	; 26/10/2015
   675                              <1> 	popf	
   676                              <1> sp_i7:
   677                              <1> 	retn
   678                              <1> 
   679                              <1> sp_i3:
   680                              <1> ;A4:  	;-----	INITIALIZE THE COMMUNICATIONS PORT
   681                              <1> 	; 28/10/2015
   682                              <1> 	inc	dl	; 3F9h (2F9h)	; 3F9h, COM1 Interrupt enable register 
   683                              <1> 	mov	al, 0
   684                              <1> 	out	dx, al			; disable serial port interrupt
   685                              <1> 	JMP	$+2			; I/O DELAY
   686                              <1> 	add	dl, 2 	; 3FBh (2FBh)	; COM1 Line control register (3FBh)
   687                              <1> 	mov	al, 80h			
   688                              <1> 	out	dx, al			; SET DLAB=1 ; divisor latch access bit
   689                              <1> 	;-----	SET BAUD RATE DIVISOR
   690                              <1> 	; 26/10/2015
   691                              <1> 	sub 	dl, 3   ; 3F8h (2F8h)	; register for least significant byte
   692                              <1> 					; of the divisor value
   693                              <1> 	mov	al, cl	; 1
   694                              <1> 	out	dx, al			; 1 = 115200 baud (Retro UNIX 386 v1)
   695                              <1> 					; 2 = 57600 baud
   696                              <1> 					; 3 = 38400 baud
   697                              <1> 					; 6 = 19200 baud
   698                              <1> 					; 12 = 9600 baud (Retro UNIX 8086 v1)
   699                              <1> 	JMP	$+2			; I/O DELAY
   700                              <1> 	sub	al, al
   701                              <1> 	inc	dl      ; 3F9h (2F9h)	; register for most significant byte
   702                              <1> 					; of the divisor value
   703                              <1> 	out	dx, al ; 0
   704                              <1> 	JMP	$+2			; I/O DELAY
   705                              <1> 	;	
   706                              <1> 	mov	al, ch ; 3		; 8 data bits, 1 stop bit, no parity
   707                              <1> 	;and	al, 1Fh ; Bits 0,1,2,3,4	
   708                              <1> 	add	dl, 2	; 3FBh (2FBh)	; Line control register
   709                              <1> 	out	dx, al			
   710                              <1> 	JMP	$+2			; I/O DELAY
   711                              <1> 	; 29/10/2015
   712                              <1> 	dec 	dl 	; 3FAh (2FAh)	; FIFO Control register (16550/16750)
   713                              <1> 	xor	al, al			; 0
   714                              <1> 	out	dx, al			; Disable FIFOs (reset to 8250 mode)
   715                              <1> 	JMP	$+2	
   716                              <1> sp_i4:
   717                              <1> ;A18:	;-----	COMM PORT STATUS ROUTINE
   718                              <1> 	; 29/06/2015 (line status after modem status)
   719                              <1> 	add	dl, 4	; 3FEh (2FEh)	; Modem status register
   720                              <1> sp_i4s:
   721                              <1> 	in	al, dx			; GET MODEM CONTROL STATUS
   722                              <1> 	JMP	$+2			; I/O DELAY
   723                              <1> 	mov	ah, al			; PUT IN (AH) FOR RETURN
   724                              <1> 	dec	dl	; 3FDh (2FDh)	; POINT TO LINE STATUS REGISTER
   725                              <1> 					; dx = 3FDh for COM1, 2FDh for COM2
   726                              <1> 	in	al, dx			; GET LINE CONTROL STATUS
   727                              <1> 	; AL = Line status, AH = Modem status
   728                              <1> 	retn
   729                              <1> 
   730                              <1> sp_status:
   731                              <1> 	; 29/06/2015
   732                              <1> 	; 27/06/2015 (Retro UNIX 386 v1)
   733                              <1> 	; Get serial port status
   734                              <1> 	mov	dx, 3FEh		; Modem status register (COM1)
   735                              <1> 	sub	dh, al			; dh = 2 for COM2 (al = 1)
   736                              <1> 					; dx = 2FEh for COM2
   737                              <1> 	jmp	short sp_i4s
   738                              <1> 
   739                              <1> sp_setp: ; Set serial port communication parameters
   740                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
   741                              <1> 	; 07/11/2015
   742                              <1> 	; 29/10/2015
   743                              <1> 	; 29/06/2015
   744                              <1> 	; Retro UNIX 386 v1 feature only !	
   745                              <1> 	;
   746                              <1> 	; INPUT:
   747                              <1> 	;	AL = 0 for COM1
   748                              <1> 	;	     1 for COM2
   749                              <1> 	;	AH = Communication parameters (*)
   750                              <1> 	; OUTPUT:
   751                              <1> 	;	CL = Line status
   752                              <1> 	;	CH = Modem status
   753                              <1> 	;   If cf = 1 -> Error code in [u.error]
   754                              <1> 	;		 'invalid parameter !' 
   755                              <1> 	;		 	 or
   756                              <1> 	;		 'device not ready !' error
   757                              <1> 	;	
   758                              <1> 	;  (*) Communication parameters (except BAUD RATE):
   759                              <1> 	;	Bit	4	3	2	1	0
   760                              <1> 	;		-PARITY--   STOP BIT  -WORD LENGTH-	 		 
   761                              <1> 	;  this one -->	00 = none    0 = 1 bit  11 = 8 bits
   762                              <1> 	;		01 = odd     1 = 2 bits	10 = 7 bits
   763                              <1> 	;		11 = even
   764                              <1> 	;  Baud rate setting bits: (29/06/2015)
   765                              <1> 	;		Retro UNIX 386 v1 feature only !
   766                              <1> 	;	Bit	7    6    5  | Baud rate
   767                              <1> 	;		------------------------
   768                              <1> 	;	value	0    0    0  | Default (Divisor = 1)
   769                              <1> 	;		0    0    1  | 9600 (12)
   770                              <1> 	;		0    1    0  | 19200 (6) 
   771                              <1> 	;		0    1	  1  | 38400 (3) 
   772                              <1> 	;		1    0	  0  | 14400 (8)
   773                              <1> 	;		1    0	  1  | 28800 (4)
   774                              <1> 	;		1    1    0  | 57600 (2)
   775                              <1> 	;		1    1    1  | 115200 (1) 
   776                              <1> 	;
   777                              <1> 	; (COM1 base port address = 3F8h, COM1 Interrupt = IRQ 4)
   778                              <1> 	; (COM2 base port address = 2F8h, COM1 Interrupt = IRQ 3)
   779                              <1> 	;
   780                              <1> 	; ((Modified registers: EAX, ECX, EDX, EBX))
   781                              <1> 	;
   782                              <1> 	mov	dx, 3F8h
   783                              <1> 	mov	ebx, com1p ; COM1 control byte offset
   784                              <1> 	cmp	al, 1
   785                              <1> 	ja 	short sp_invp_err
   786                              <1> 	jb	short sp_setp1 ;  COM1 (AL = 0)
   787                              <1> 	dec	dh ; 2F8h
   788                              <1> 	inc	ebx ; COM2 control byte offset
   789                              <1> sp_setp1:
   790                              <1> 	; 29/10/2015
   791                              <1> 	mov	[ebx], ah
   792                              <1> 	movzx 	ecx, ah
   793                              <1> 	shr	cl, 5 ; -> baud rate index
   794                              <1> 	and	ah, 1Fh ; communication parameters except baud rate
   795                              <1> 	mov	al, [ecx+b_div_tbl]
   796                              <1> 	mov	cx, ax
   797                              <1> 	call	sp_i3
   798                              <1> 	mov	cx, ax ; CL = Line status, CH = Modem status
   799                              <1> 	test	al, 80h
   800                              <1> 	jz	short sp_setp2
   801                              <1>         mov     byte [ebx], 0E3h ; Reset to initial value (11100011b)
   802                              <1> stp_dnr_err:
   803                              <1> 	mov	dword [u.error], ERR_DEV_NOT_RDY ; 'device not ready !'
   804                              <1> 	; CL = Line status, CH = Modem status
   805                              <1> 	stc
   806                              <1> 	retn
   807                              <1> sp_setp2:
   808                              <1> 	cmp	dh, 2 ; COM2 (2F?h)
   809                              <1> 	;jna	sp_i6 
   810                              <1> 		      ; COM1 (3F?h)
   811                              <1> 	; 29/07/2022
   812                              <1> 	ja	short sp_i5
   813                              <1> 	jmp	sp_i6
   814                              <1> sp_i5: 
   815                              <1> 	; 29/07/2022
   816                              <1> 	; 07/11/2015
   817                              <1> 	; 26/10/2015
   818                              <1> 	; 29/06/2015
   819                              <1> 	;
   820                              <1> 	;; COM1 - enabling IRQ 4
   821                              <1> 	pushf
   822                              <1> 	cli
   823                              <1> 	mov	dx, 3FCh   		; modem control register
   824                              <1> 	in	al, dx 	   		; read register
   825                              <1> 	JMP	$+2			; I/O DELAY
   826                              <1> 	or	al, 8      		; enable bit 3 (OUT2)
   827                              <1> 	out	dx, al     		; write back to register
   828                              <1> 	JMP	$+2			; I/O DELAY
   829                              <1> 	;mov	dx, 3F9h   		; interrupt enable register
   830                              <1> 	; 29/07/2022
   831                              <1> 	mov	dl, 0F9h
   832                              <1> 	in	al, dx     		; read register
   833                              <1> 	JMP	$+2			; I/O DELAY
   834                              <1> 	;or	al, 1      		; receiver data interrupt enable and
   835                              <1> 	or	al, 3	   		; transmitter empty interrupt enable
   836                              <1> 	out	dx, al 	   		; write back to register
   837                              <1> 	JMP	$+2        		; I/O DELAY
   838                              <1> 	in	al, 21h    		; read interrupt mask register
   839                              <1> 	JMP	$+2			; I/O DELAY
   840                              <1> 	and	al, 0EFh   		; enable IRQ 4 (COM1)
   841                              <1> 	out	21h, al    		; write back to register
   842                              <1> 	;
   843                              <1> 	; 23/10/2015
   844                              <1> 	mov 	eax, com1_int
   845                              <1> 	mov	[com1_irq4], eax
   846                              <1> 	; 26/10/2015
   847                              <1> 	popf
   848                              <1> 	retn
   849                              <1> 
   850                              <1> sp_invp_err:
   851                              <1> 	mov	dword [u.error], ERR_INV_PARAMETER ; 'invalid parameter !' 
   852                              <1> 	xor	ecx, ecx
   853                              <1> 	dec	ecx ; 0FFFFh
   854                              <1> 	stc
   855                              <1> 	retn
   856                              <1> 
   857                              <1> ; 29/10/2015
   858                              <1> b_div_tbl: ; Baud rate divisor table (115200/divisor)
   859                              <1> 	db 1, 12, 6, 3, 8, 4, 1
   860                              <1> 
   861                              <1> %endif
   862                              <1> 
   863                              <1> ; 23/10/2015
   864                              <1> com1_irq4:
   865 00012064 [6C200100]          <1> 	dd dummy_retn
   866                              <1> com2_irq3:
   867 00012068 [6C200100]          <1> 	dd dummy_retn
   868                              <1> 
   869                              <1> ; 21/11/2023
   870                              <1> dummy_retn:
   871                              <1> 	;retn
   872                              <1> wakeup:
   873                              <1> 	; 24/01/2016
   874 0001206C C3                  <1> 	retn
   875                              <1> 
   876                              <1> set_working_path_x:
   877                              <1> 		; 17/10/2016 (TRDOS 386 - FFF & FNF)
   878                              <1> 		;mov	ax, 1 
   879                              <1> 			; File name is needed/forced (AL=1)
   880                              <1> 			; Change directory as temporary (AH=0)	
   881                              <1> 		; 29/07/2022
   882 0001206D 31C0                <1> 		xor	eax, eax
   883 0001206F FEC0                <1> 		inc	al
   884                              <1> 		; eax = 1
   885                              <1> set_working_path_xx: ; 30/12/2017 (syschdir)
   886                              <1> 		; This is needed for preventing wrong Find Next File
   887                              <1> 		; system call after sysopen, syscreate, sysmkdir etc. 
   888                              <1> 		; Find Next File must immediate follow Find First File)
   889                              <1> 
   890 00012071 8825[F8830100]      <1> 		mov	[FFF_Valid], ah ; 0 ; reset ; 17/10/2016
   891                              <1> 
   892                              <1> set_working_path:
   893                              <1> 		; 08/08/2022
   894                              <1> 		; 29/07/2022 - TRDOS 386 Kernel v2.0.5
   895                              <1> 		; 16/10/2016
   896                              <1> 		; 12/10/2016
   897                              <1> 		; 10/10/2016
   898                              <1> 		; 05/10/2016 - TRDOS 386 (TRDOS v2.0)
   899                              <1> 		;
   900                              <1> 		; TRDOS v1.0 (DIR.ASM, "proc_set_working_path")
   901                              <1>                 ; 27/01/2011 - 08/02/2011 
   902                              <1> 		; Set/Changes current drive, directory and file
   903                              <1> 		; depending on command tail
   904                              <1> 		; (procedure is derivated from CMD_INTR.ASM 
   905                              <1> 		; file or dir locating code of internal commands)
   906                              <1> 		; (This procedure is prepared for INT 21H file/dir 
   907                              <1> 		; functions and also to get compact code for 
   908                              <1> 		; internal mainprog -command interpreter- commands)
   909                              <1> 		; 
   910                              <1> 		; INPUT: DS:SI -> Command tail (ASCIIZ string)
   911                              <1> 		; AL = 0 -> any, AL > 0 -> file name is forced
   912                              <1> 		; AH = CD -> Change directory permanently 
   913                              <1> 		; AH <> CD -> Change directory as temporary    
   914                              <1> 		; 
   915                              <1> 		; OUTPUT: ES=DS, FindFile structure has been set
   916                              <1> 		;        RUN_CDRV points previous current drive  
   917                              <1> 		;        DS:SI = FindFile structure address
   918                              <1> 		;        (DS=CS)       
   919                              <1> 		;        AX, BX, CX, DX, DI will be changed
   920                              <1> 		;   cf = 1 -> Error code in AX (AL)
   921                              <1> 		;        stc & AX = 0 -> Bad command or path name 
   922                              <1> 		; -----------------------------------------------
   923                              <1> 		;
   924                              <1> 		; TRDOS 386 (05/10/2016)
   925                              <1> 		; INPUT:
   926                              <1> 		;	ESI = File/Directory Path (ASCIIZ string)
   927                              <1> 		;             address in user's memory space
   928                              <1> 		;       AL = 0 -> any
   929                              <1> 		;       AL > 0 -> file name is forced
   930                              <1> 		;       AH = CD -> change directory as permanent
   931                              <1> 		;       AH <> CD -> change directory as temporary
   932                              <1> 		; 
   933                              <1> 		; OUTPUT:
   934                              <1> 		;	FindFile structure has been set
   935                              <1> 		;       RUN_CDRV points previous current drive  
   936                              <1> 		;       ESI = FindFile_Name address ; 12/10/2016
   937                              <1> 		;
   938                              <1> 		;       cf = 1 -> Error code in EAX (AL)
   939                              <1> 		;       stc & EAX = 0 -> Bad command or path name
   940                              <1> 		;  
   941                              <1> 		; Modified registers: EAX, EBX, ECX, EDX, ESI, EDI
   942                              <1> 
   943 00012077 66A3[FC830100]      <1> 		mov	[SWP_Mode], ax
   944 0001207D A0[0A780100]        <1> 		mov	al, [Current_Drv]
   945 00012082 30E4                <1> 		xor	ah, ah
   946 00012084 66A3[FE830100]      <1> 		mov	[SWP_DRV], ax
   947                              <1> 
   948                              <1> 		; TRDOS 386 ring 3 (user's page directory)
   949                              <1> 		; to ring 0 (kernel's page directory) 
   950                              <1> 		; transfer modifications (05/10/2016).
   951                              <1> 
   952 0001208A 55                  <1> 		push	ebp
   953 0001208B 89E5                <1> 		mov	ebp, esp
   954                              <1> 		
   955                              <1> 		;mov	ecx, 128 ; maximum path length = 128 bytes
   956                              <1> 		; 29/07/2022
   957 0001208D 31C9                <1> 		xor	ecx, ecx
   958 0001208F B180                <1> 		mov	cl, 128
   959 00012091 29CC                <1> 		sub	esp, ecx ; reserve 128 bytes (buffer) on stack
   960 00012093 89E7                <1> 		mov	edi, esp ; destination address (kernel space)
   961                              <1> 		; esi = source address (virtual, in user's memory space)
   962 00012095 E859EDFFFF          <1> 		call	transfer_from_user_buffer
   963 0001209A 720D                <1> 		jc	short loc_swp_xor_retn 
   964                              <1> 		
   965 0001209C 89E6                <1> 		mov	esi, esp ; temporary buffer (the path) on stack
   966                              <1> loc_swp_fchar:
   967 0001209E 8A06                <1> 		mov	al, [esi]
   968 000120A0 3C20                <1> 		cmp	al, 20h
   969 000120A2 7711                <1> 		ja	short loc_swp_parse_path_name
   970                              <1> 		;je	short loc_swp_fchar_next
   971                              <1> 		; 29/07/2022
   972 000120A4 7203                <1> 		jb	short loc_swp_xor_retn
   973                              <1> 
   974                              <1> loc_swp_fchar_next:
   975 000120A6 46                  <1> 		inc	esi
   976 000120A7 EBF5                <1> 		jmp	short loc_swp_fchar
   977                              <1> 
   978                              <1> loc_swp_xor_retn:
   979 000120A9 31C0                <1> 		xor	eax, eax
   980 000120AB F9                  <1> 		stc
   981                              <1> loc_swp_retn:
   982 000120AC 89EC                <1> 		mov	esp, ebp
   983 000120AE 5D                  <1> 		pop	ebp
   984                              <1> 
   985                              <1> 		;mov	esi, FindFile_Drv
   986 000120AF BE[EC800100]        <1> 		mov	esi, FindFile_Name ; 12/10/2016
   987 000120B4 C3                  <1> 		retn 
   988                              <1> 
   989                              <1> ;loc_swp_fchar_next:
   990                              <1> ;		inc	esi
   991                              <1> ;		jmp	short loc_swp_fchar  
   992                              <1> 
   993                              <1> loc_swp_parse_path_name:
   994 000120B5 BF[AA800100]        <1> 		mov	edi, FindFile_Drv
   995 000120BA E8958AFFFF          <1> 		call	parse_path_name
   996 000120BF 72EB                <1> 		jc	short loc_swp_retn
   997                              <1> 
   998                              <1> loc_swp_checkfile_name:
   999 000120C1 803D[FC830100]00    <1> 		cmp	byte [SWP_Mode], 0
  1000 000120C8 761E                <1> 		jna	short loc_swp_drv
  1001                              <1> 
  1002                              <1> 		; 10/10/2016 (valid file name checking)
  1003 000120CA BE[EC800100]        <1> 		mov	esi, FindFile_Name
  1004 000120CF 803E20              <1> 		cmp	byte [esi], 20h
  1005 000120D2 76D5                <1> 		jna	short loc_swp_xor_retn
  1006                              <1> 
  1007                              <1> 		; 16/10/2016
  1008 000120D4 C605[FB830100]00    <1> 		mov	byte [SWP_inv_fname], 0 ; reset 
  1009                              <1> 		; esi = file name address (ASCIIZ)
  1010 000120DB E8556DFFFF          <1> 		call	check_filename
  1011 000120E0 7306                <1> 		jnc	short loc_swp_drv
  1012                              <1> 
  1013 000120E2 FE05[FB830100]      <1> 		inc	byte [SWP_inv_fname] ; set 	
  1014                              <1> loc_swp_drv:
  1015 000120E8 8A35[0A780100]      <1> 		mov	dh, [Current_Drv]
  1016                              <1>                ;mov	[RUN_CDRV], dh
  1017                              <1> 
  1018 000120EE 8A15[AA800100]      <1> 		mov	dl, [FindFile_Drv]
  1019                              <1>                ;cmp	dl, dh
  1020 000120F4 3A15[0A780100]      <1> 		cmp	dl, [Current_Drv]
  1021 000120FA 740D                <1> 		je	short loc_swp_change_directory
  1022                              <1> 
  1023 000120FC FE05[FF830100]      <1> 		inc	byte [SWP_DRV_chg]
  1024 00012102 E8DB56FFFF          <1> 		call	change_current_drive
  1025 00012107 72A3                <1> 		jc	short loc_swp_retn ; eax = error code
  1026                              <1> 		; eax = 0
  1027                              <1> 
  1028                              <1> loc_swp_change_directory:
  1029 00012109 803D[AB800100]21    <1> 		cmp	byte [FindFile_Directory], 21h
  1030 00012110 F5                  <1> 		cmc
  1031 00012111 7399                <1> 		jnc	short loc_swp_retn
  1032                              <1> 
  1033 00012113 FE05[FF830100]      <1> 		inc	byte [SWP_DRV_chg]
  1034 00012119 FE05[BF2F0100]      <1> 		inc	byte [Restore_CDIR]
  1035 0001211F BE[AB800100]        <1> 		mov	esi, FindFile_Directory
  1036 00012124 8A25[FD830100]      <1> 		mov	ah, [SWP_Mode+1] 
  1037 0001212A E83984FFFF          <1> 		call	change_current_directory
  1038                              <1> 		;jc	short loc_swp_retn ; eax = error code
  1039                              <1> 		; 08/08/2022
  1040 0001212F 7305                <1> 		jnc	short loc_swp_change_prompt_dir_string
  1041 00012131 E976FFFFFF          <1> 		jmp	loc_swp_retn	
  1042                              <1> 
  1043                              <1> loc_swp_change_prompt_dir_string:
  1044                              <1> 		; esi = PATH_Array
  1045                              <1> 		; eax = Current Directory First Cluster
  1046                              <1> 		; edi = Logical DOS Drive Description Table	
  1047 00012136 E85B83FFFF          <1> 		call	change_prompt_dir_str 
  1048 0001213B 29C0                <1> 		sub	eax, eax ; 0
  1049 0001213D E96AFFFFFF          <1> 		jmp	loc_swp_retn 
  1050                              <1> 
  1051                              <1> reset_working_path:
  1052                              <1> 		; 06/10/2016 - TRDOS 386 (TRDOS v2.0)
  1053                              <1> 		;
  1054                              <1> 		; TRDOS v1.0 (DIR.ASM, "proc_reset_working_path")
  1055                              <1> 		; 05/02/2011 - 08/02/2011 
  1056                              <1> 		;
  1057                              <1> 		; Restores current drive and directory 
  1058                              <1> 		; 
  1059                              <1> 		; INPUT: none
  1060                              <1> 		; OUTPUT: DL = SWP_DRV, EAX = 0 -> OK
  1061                              <1> 		;
  1062                              <1> 		;    AX = 0 -> ESI = Logical Dos Drv Desc. Table
  1063                              <1> 		;
  1064                              <1> 		;    EAX, EBX, ECX, EDX, ESI, EDI will be changed
  1065                              <1> 		;
  1066                              <1> 
  1067                              <1>   
  1068 00012142 31C0                <1> 		xor	eax, eax
  1069 00012144 48                  <1> 		dec	eax 
  1070                              <1> 
  1071 00012145 668B15[FE830100]    <1> 		mov	dx, [SWP_DRV]
  1072 0001214C 08F6                <1> 		or	dh, dh
  1073 0001214E 742E                <1> 		jz	short loc_rwp_return
  1074                              <1> 
  1075 00012150 3A15[0A780100]      <1> 		cmp	dl, [Current_Drv]
  1076 00012156 7407                <1> 		je	short loc_rwp_restore_cdir
  1077                              <1> loc_rwp_restore_cdrv:
  1078 00012158 E88556FFFF          <1> 		call	change_current_drive 
  1079 0001215D EB10                <1> 		jmp	short loc_rwp_restore_ok
  1080                              <1> loc_rwp_restore_cdir:
  1081 0001215F 31DB                <1> 		xor	ebx, ebx
  1082 00012161 88D7                <1> 		mov	bh, dl
  1083 00012163 BE00010900          <1> 		mov	esi, Logical_DOSDisks
  1084 00012168 01DE                <1> 		add	esi, ebx
  1085                              <1> 
  1086 0001216A E82957FFFF          <1> 		call	restore_current_directory
  1087                              <1> 
  1088                              <1> loc_rwp_restore_ok:
  1089 0001216F 668B15[FE830100]    <1> 		mov	dx, [SWP_DRV]
  1090 00012176 31C0                <1> 		xor	eax, eax  
  1091 00012178 66A3[FF830100]      <1> 		mov	[SWP_DRV_chg], ax
  1092                              <1> loc_rwp_return:
  1093 0001217E C3                  <1> 		retn
  1094                              <1> 
  1095                              <1> get_file_name:
  1096                              <1> 		; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  1097                              <1> 		; 15/10/2016 - TRDOS 386 (TRDOS v2.0)
  1098                              <1> 		; Convert file name 
  1099                              <1> 		;	from directory entry format
  1100                              <1>                 ; 	to (8.3) dot file name format 
  1101                              <1> 		;
  1102                              <1> 		; TRDOS v1.0 (DIR.ASM, "get_file_name")
  1103                              <1>                 ; 2005 - 09/10/2011 	
  1104                              <1> 		; INPUT: 
  1105                              <1> 		;	DS:SI -> Directory Entry Format File Name
  1106                              <1> 		;       ES:DI -> DOS Dot File Name Address
  1107                              <1> 		; OUTPUT:
  1108                              <1> 		;	DS:SI -> DOS Dot File Name Address
  1109                              <1>                 ;	ES:DI -> Directory Entry Format File Name
  1110                              <1> 		;	
  1111                              <1> 		; TRDOS 386 (15/10/2016)
  1112                              <1> 		; INPUT:
  1113                              <1> 		;	ESI = File name addr in dir entry format
  1114                              <1> 		;	EDI = Dot file name address (destination)
  1115                              <1> 		; OUTPUT: 
  1116                              <1> 		;	File name is converted and moved
  1117                              <1> 		;	to destination (as 8.3 dot filename)
  1118                              <1> 		;  
  1119                              <1> 		; Modified registers: EAX, ECX
  1120                              <1> 
  1121                              <1>                 ; 2005 (TRDOS 8086) - 2016 (TRDOS 386)
  1122                              <1>                             
  1123 0001217F 57                  <1> 		push	edi
  1124 00012180 56                  <1> 		push	esi
  1125 00012181 AC                  <1> 		lodsb
  1126 00012182 3C20                <1> 		cmp	al, 20h
  1127 00012184 7629                <1> 		jna	short pass_gfn_ext
  1128 00012186 56                  <1> 		push	esi
  1129 00012187 AA                  <1> 		stosb
  1130                              <1> 		;mov	ecx, 7
  1131                              <1> 		; 29/07/2022
  1132 00012188 31C9                <1> 		xor	ecx, ecx
  1133 0001218A B107                <1> 		mov	cl, 7
  1134                              <1> loc_gfn_next_char:
  1135 0001218C AC                  <1> 		lodsb
  1136 0001218D 3C20                <1> 		cmp	al, 20h
  1137 0001218F 7603                <1> 		jna	short pass_gfn_fn
  1138 00012191 AA                  <1> 		stosb
  1139 00012192 E2F8                <1> 		loop	loc_gfn_next_char
  1140                              <1> pass_gfn_fn:
  1141 00012194 5E                  <1> 		pop	esi
  1142 00012195 83C607              <1> 		add	esi, 7
  1143 00012198 AC                  <1> 		lodsb
  1144 00012199 3C20                <1> 		cmp	al, 20h
  1145 0001219B 7612                <1> 		jna	short pass_gfn_ext
  1146 0001219D B42E                <1> 		mov	ah, '.'
  1147 0001219F 86E0                <1> 		xchg	ah, al
  1148 000121A1 66AB                <1> 		stosw
  1149 000121A3 AC                  <1> 		lodsb
  1150 000121A4 3C20                <1> 		cmp	al, 20h
  1151 000121A6 7607                <1> 		jna	short pass_gfn_ext
  1152 000121A8 AA                  <1> 		stosb
  1153 000121A9 AC                  <1> 		lodsb
  1154 000121AA 3C20                <1> 		cmp	al, 20h
  1155 000121AC 7601                <1> 		jna	short pass_gfn_ext
  1156 000121AE AA                  <1> 		stosb
  1157                              <1> pass_gfn_ext:		
  1158 000121AF 30C0                <1> 		xor	al, al
  1159 000121B1 AA                  <1> 		stosb
  1160 000121B2 5E                  <1> 		pop	esi
  1161 000121B3 5F                  <1> 		pop	edi
  1162 000121B4 C3                  <1> 		retn
  1163                              <1> 
  1164                              <1> set_hardware_int_vector:
  1165                              <1> 		; 18/03/2017
  1166                              <1> 		; 03/03/2017
  1167                              <1> 		; 28/02/2017 - TRDOS 386 (TRDOS v2.0)
  1168                              <1> 		;
  1169                              <1> 		; SET/RESET HARDWARE INTERRUPT GATE
  1170                              <1> 		;
  1171                              <1> 		; Changes interrupt gate descriptor table
  1172                              <1> 		; (without changing default interrupt list)
  1173                              <1> 		;
  1174                              <1> 		; INPUT:
  1175                              <1> 		;	AL = IRQ number (0 to 15)
  1176                              <1> 		;	AH > 0 -> set
  1177                              <1> 		;	AH = 0 -> reset
  1178                              <1> 		;	
  1179                              <1> 		; Modified registers: eax, ebx, edx, edi 
  1180                              <1> 		;
  1181                              <1> 		
  1182 000121B5 C0E002              <1> 		shl	al, 2 ; IRQ number * 4
  1183 000121B8 0FB6D8              <1> 		movzx	ebx, al
  1184                              <1> 
  1185 000121BB 08E4                <1> 		or	ah, ah
  1186 000121BD 7508                <1> 		jnz	short shintv_1 ; set (for user call service)
  1187                              <1> 		
  1188                              <1> 		; 18/03/2017
  1189 000121BF 81C3[AC370100]      <1> 		add	ebx, IRQ_list ; reset to default interrupt list
  1190 000121C5 EB06                <1> 		jmp	short shintv_2
  1191                              <1> shintv_1:
  1192 000121C7 81C3[EE210100]      <1> 		add	ebx, IRQ_u_list
  1193                              <1> shintv_2:	
  1194 000121CD 8B13                <1> 		mov	edx, [ebx] ; IRQ handler address
  1195                              <1> 		
  1196                              <1> 		; 03/03/2017
  1197 000121CF D0E0                <1> 		shl	al, 1 ; IRQ number * 8 
  1198                              <1> 		; 18/03/2017
  1199 000121D1 0FB6F8              <1> 		movzx	edi, al 
  1200 000121D4 81C7[60750100]      <1> 		add	edi, idt + (8*32) ; IRQ 0 offset = idt + 256
  1201                              <1> 		
  1202 000121DA 89D0                <1> 		mov	eax, edx ; IRQ handler address
  1203 000121DC BB00000800          <1> 		mov	ebx, 80000h
  1204                              <1> 
  1205                              <1> 		;mov	edx, eax
  1206 000121E1 66BA008E            <1> 		mov	dx, 8E00h
  1207 000121E5 6689C3              <1> 		mov	bx, ax
  1208 000121E8 89D8                <1> 		mov	eax, ebx ; /* selector = 0x0008 = cs */
  1209                              <1>        			         ; /* interrupt gate - dpl=0, present */
  1210 000121EA AB                  <1> 		stosd	; selector & offset bits 0-15 	
  1211 000121EB 8917                <1> 		mov	[edi], edx ; attributes & offset bits 16-23
  1212                              <1> 
  1213 000121ED C3                  <1> 		retn
  1214                              <1> IRQ_u_list:
  1215                              <1> 		; 28/02/2017
  1216 000121EE [66090000]          <1> 		dd	timer_int
  1217 000121F2 [C9100000]          <1> 		dd	kb_int
  1218 000121F6 [490B0000]          <1> 		dd	irq2
  1219 000121FA [2E220100]          <1> 		dd	IRQ_service3
  1220 000121FE [38220100]          <1> 		dd	IRQ_service4
  1221 00012202 [42220100]          <1> 		dd	IRQ_service5
  1222 00012206 [2A4E0000]          <1> 		dd	fdc_int	
  1223 0001220A [4C220100]          <1> 		dd	IRQ_service7
  1224 0001220E [D10A0000]          <1> 		dd	rtc_int
  1225 00012212 [56220100]          <1> 		dd	IRQ_service9
  1226 00012216 [60220100]          <1> 		dd	IRQ_service10
  1227 0001221A [6A220100]          <1> 		dd	IRQ_service11
  1228 0001221E [74220100]          <1> 		dd	IRQ_service12
  1229 00012222 [7E220100]          <1> 		dd	IRQ_service13
  1230 00012226 [AC560000]          <1> 		dd	hdc1_int
  1231 0001222A [CF560000]          <1> 		dd	hdc2_int
  1232                              <1> 
  1233                              <1> 		; 03/03/2017
  1234                              <1> 		; 27/02/2017
  1235                              <1> IRQ_service3:
  1236 0001222E 36C605[6C890100]03  <1> 		mov	byte [ss:IRQnum], 3
  1237 00012236 EB4E                <1> 		jmp	short IRQ_service
  1238                              <1> IRQ_service4:
  1239 00012238 36C605[6C890100]04  <1> 		mov	byte [ss:IRQnum], 4
  1240 00012240 EB44                <1> 		jmp	short IRQ_service
  1241                              <1> IRQ_service5:
  1242 00012242 36C605[6C890100]05  <1> 		mov	byte [ss:IRQnum], 5
  1243 0001224A EB3A                <1> 		jmp	short IRQ_service
  1244                              <1> IRQ_service7:
  1245 0001224C 36C605[6C890100]07  <1> 		mov	byte [ss:IRQnum], 7
  1246 00012254 EB30                <1> 		jmp	short IRQ_service
  1247                              <1> IRQ_service9:
  1248 00012256 36C605[6C890100]09  <1> 		mov	byte [ss:IRQnum], 9
  1249 0001225E EB26                <1> 		jmp	short IRQ_service
  1250                              <1> IRQ_service10:
  1251 00012260 36C605[6C890100]0A  <1> 		mov	byte [ss:IRQnum], 10
  1252 00012268 EB1C                <1> 		jmp	short IRQ_service
  1253                              <1> IRQ_service11:
  1254 0001226A 36C605[6C890100]0B  <1> 		mov	byte [ss:IRQnum], 11
  1255 00012272 EB12                <1> 		jmp	short IRQ_service
  1256                              <1> IRQ_service12:
  1257 00012274 36C605[6C890100]0C  <1> 		mov	byte [ss:IRQnum], 12
  1258 0001227C EB08                <1> 		jmp	short IRQ_service
  1259                              <1> IRQ_service13:
  1260 0001227E 36C605[6C890100]0D  <1> 		mov	byte [ss:IRQnum], 13
  1261                              <1> 		;jmp	short IRQ_service
  1262                              <1> IRQ_service:
  1263                              <1> 		; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  1264                              <1> 		; 13/06/2017
  1265                              <1> 		; 11/06/2017
  1266                              <1> 		; 10/06/2017
  1267                              <1> 		; 01/03/2017, 04/03/2017
  1268                              <1> 		; 27/02/2017, 28/02/2017
  1269 00012286 1E                  <1> 		push	ds
  1270 00012287 06                  <1> 		push	es
  1271 00012288 0FA0                <1> 		push	fs
  1272 0001228A 0FA8                <1> 		push	gs
  1273                              <1> 
  1274 0001228C 60                  <1> 		pushad	; eax,ecx,edx,ebx,esp,ebp,esi,edi
  1275 0001228D 66B91000            <1> 		mov     cx, KDATA
  1276 00012291 8ED9                <1>         	mov     ds, cx
  1277 00012293 8EC1                <1>         	mov     es, cx
  1278 00012295 8EE1                <1>         	mov     fs, cx
  1279 00012297 8EE9                <1>         	mov     gs, cx
  1280                              <1> 
  1281 00012299 0F20D8              <1> 		mov	eax, cr3
  1282 0001229C A3[68890100]        <1> 		mov	[IRQ_cr3], eax
  1283                              <1> 
  1284 000122A1 A1[48770100]        <1> 		mov	eax, [k_page_dir]
  1285 000122A6 0F22D8              <1> 		mov	cr3, eax 
  1286                              <1> 
  1287 000122A9 A0[6C890100]        <1> 		mov	al, [IRQnum]
  1288                              <1> 
  1289                              <1> 		;mov	cl, [sysflg]
  1290                              <1> 		;mov	[u.r_mode], cl  ; system (0) or user mode (FFh) 
  1291                              <1> IRQsrv_0:
  1292 000122AE 0FB6D8              <1> 		movzx	ebx, al
  1293 000122B1 8A9B[E2360100]      <1> 		mov	bl, [ebx+IRQenum] ; IRQ (available) index number + 1
  1294                              <1> 		; 01/03/2017
  1295 000122B7 FECB                <1> 		dec	bl  ; IRQ index number, 0 to 8
  1296                              <1> 		;js	IRQsrv_5 ; not available to use here!?
  1297                              <1> 		; 29/07/2022
  1298 000122B9 785E                <1> 		js	short IRQsrv_j5  ; (jump to IRQsrv_5)		
  1299                              <1> 		;		 
  1300 000122BB 80BB[32890100]80    <1> 		cmp	byte [ebx+IRQ.method], 80h ; using by a dev or kernel? 
  1301 000122C2 7205                <1> 		jb	short IRQsrv_1 ; no
  1302                              <1> 
  1303                              <1> 		; If the IRQ service is already owned by TRDOS 386 kernel
  1304                              <1> 		;	 or a Device driver
  1305                              <1> 		; we need to call 'dev_IRQ_service'
  1306                              <1> 
  1307                              <1> 		; IRQ number in AL
  1308 000122C4 E80E010000          <1> 		call	dev_IRQ_service	 ; IRQ service for device drivers	
  1309                              <1> 		; IRQ number in AL
  1310                              <1> IRQsrv_1:		
  1311                              <1> 		; check user callback service status
  1312                              <1> 		; AL = IRQ number
  1313                              <1> 		; EBX = IRQ (Available) Index number
  1314                              <1> 
  1315 000122C9 A2[93010300]        <1> 		mov	[u.irqwait], al ; set waiting IRQ flag
  1316                              <1> 
  1317 000122CE 8A83[20890100]      <1> 		mov	al, [ebx+IRQ.owner]
  1318 000122D4 20C0                <1> 		and	al, al
  1319                              <1> 		;jz	IRQsrv_5 ; it is not owned by a user/proc
  1320                              <1> 		; 29/07/2022
  1321 000122D6 7441                <1> 		jz	short IRQsrv_j5  ; (jump to IRQsrv_5)
  1322                              <1> 
  1323                              <1> 		; 03/03/2017
  1324 000122D8 89DA                <1> 		mov	edx, ebx
  1325 000122DA C0E202              <1> 		shl	dl, 2
  1326 000122DD 8B92[44890100]      <1> 		mov	edx, [edx+IRQ.addr] ; S.R.B. or Callback service addr
  1327                              <1> 		
  1328 000122E3 8AA3[32890100]      <1> 		mov	ah, [ebx+IRQ.method]
  1329 000122E9 F6C401              <1> 		test	ah, 1
  1330 000122EC 7530                <1> 		jnz	short IRQsrv_4 ; Callback service method
  1331                              <1> 
  1332                              <1> 		; Signal Response Byte method
  1333                              <1> 		;mov	edx, [edx+IRQ.addr] ; Signal Response Byte address
  1334                              <1> 		;			    ; (Physical address, non-swappable) 	
  1335 000122EE 80E402              <1> 		and	ah, 2 ; bit 1, (S.R.B.) counter (auto increment) method
  1336 000122F1 8AA3[3B890100]      <1> 		mov	ah, [ebx+IRQ.srb] ; Signal Response Byte value
  1337 000122F7 7408                <1> 		jz	short IRQsrv_2 ; fixed S.R.B. value
  1338                              <1> 		; counter method (auto increment)
  1339 000122F9 FEC4                <1> 		inc	ah
  1340 000122FB 88A3[3B890100]      <1> 		mov	[ebx+IRQ.srb], ah ; next (count) number
  1341                              <1> IRQsrv_2:
  1342 00012301 8822                <1> 		mov	[edx], ah ; put S.R.B. val to the user's S.R.B. addr
  1343 00012303 C605[93010300]00    <1> 		mov	byte [u.irqwait], 0 ; clear waiting IRQ flag
  1344                              <1> 
  1345 0001230A 3A05[6D010300]      <1> 		cmp	al, [u.uno]
  1346                              <1> 		;je	IRQsrv_5 ; the owner is current user/process
  1347                              <1> 		; 29/07/2022
  1348 00012310 7407                <1> 		je	short IRQsrv_j5  ; (jump to IRQsrv_5)
  1349                              <1> IRQsrv_3:
  1350                              <1> 		; the owner is not current user/process
  1351                              <1> 		; AL = process number
  1352 00012312 B202                <1> 		mov	dl, 2 ; priority, 2 = event (high)	
  1353 00012314 E894FBFFFF          <1> 		call	set_run_sequence
  1354                              <1> 
  1355                              <1> 		; [u.irqwait] = waiting IRQ number for callback service
  1356                              <1> IRQsrv_j5:		; 29/07/2022
  1357 00012319 E998000000          <1> 		jmp	IRQsrv_5
  1358                              <1> IRQsrv_4:
  1359 0001231E 3A05[6D010300]      <1> 		cmp	al, [u.uno]  ; is the owner is current user/process?
  1360 00012324 75EC                <1> 		jne	short IRQsrv_3 ; no !
  1361                              <1> 
  1362                              <1> 		; Check if an IRQ callback service already in progress
  1363 00012326 803D[94010300]00    <1> 		cmp	byte [u.r_lock], 0
  1364                              <1> 		;ja	IRQsrv_5 ; nothing to do !  
  1365                              <1> 				     ; (we need to complete prev callback)
  1366                              <1> 		; 29/07/2022
  1367 0001232D 77EA                <1> 		ja	short IRQsrv_j5  ; (jump to IRQsrv_5)
  1368                              <1> 
  1369 0001232F 803D[90010300]00    <1> 		cmp	byte [u.t_lock], 0
  1370 00012336 777E                <1> 		ja	short IRQsrv_5 ; nothing to do !  
  1371                              <1> 				     ; (we need to complete timer callback)
  1372                              <1> 
  1373                              <1> 		; 04/03/2017
  1374 00012338 C605[93010300]00    <1> 		mov	byte [u.irqwait], 0 ; reset/clear waiting IRQ flag
  1375                              <1> 
  1376 0001233F FE05[94010300]      <1> 		inc	byte [u.r_lock] ; 'IRQ callback service in progress' flag
  1377                              <1> 
  1378 00012345 8A0D[10010300]      <1> 		mov	cl, [sysflg]   ; (system call) mode flag (kernel/user)
  1379 0001234B 880D[95010300]      <1> 		mov	[u.r_mode], cl ; system mode (0) or user mode (FFh)
  1380                              <1> 
  1381                              <1> 		; 
  1382 00012351 8B2D[E4760100]      <1> 		mov	ebp, [tss.esp0] ; kernel stack address (for ring 0)
  1383 00012357 83ED14              <1> 		sub	ebp, 20		; eip, cs, eflags, esp, ss
  1384 0001235A 892D[14010300]      <1> 	 	mov	[u.sp], ebp
  1385 00012360 8925[18010300]      <1> 		mov	[u.usp], esp
  1386                              <1> 
  1387                              <1> 		;or	word [ebp+8], 200h ; 22/01/2017, force enabling interrupts
  1388                              <1> 
  1389 00012366 8B44241C            <1> 		mov	eax, [esp+28] ; pushed eax
  1390 0001236A A3[1C010300]        <1> 		mov	[u.r0], eax
  1391                              <1> 
  1392 0001236F E8F1E8FFFF          <1> 		call	wswap ; save user's registers & status
  1393                              <1> 
  1394                              <1> 		; software int is in ring 0 but IRQ handler must return to ring 3
  1395                              <1> 		; so, ring 3 return address and stack registers
  1396                              <1> 		; (eip, cs, eflags, esp, ss) 
  1397                              <1> 		; must be copied to IRQ handler return
  1398                              <1> 		; eip will be replaced by callback service routine address
  1399                              <1> 
  1400 00012374 C605[10010300]FF    <1> 		mov	byte [sysflg], 0FFh ; user mode
  1401                              <1> 
  1402                              <1> 		; system mode (system call)
  1403                              <1> 		;mov	ebp, [u.sp] ; EIP (u), CS (UCODE), EFLAGS (u),
  1404                              <1> 				    ; ESP (u), SS (UDATA)
  1405                              <1> 
  1406 0001237B 8B4510              <1> 		mov	eax, [ebp+16]	; SS (UDATA)
  1407 0001237E 89E6                <1> 		mov	esi, esp
  1408 00012380 50                  <1> 		push	eax
  1409 00012381 50                  <1> 		push	eax
  1410 00012382 89E7                <1> 		mov	edi, esp
  1411 00012384 893D[18010300]      <1> 		mov	[u.usp], edi
  1412 0001238A B908000000          <1> 		mov	ecx, ((ESPACE/4) - 4) ; except DS, ES, FS, GS
  1413 0001238F F3A5                <1> 		rep	movsd
  1414 00012391 B104                <1> 		mov	cl, 4	
  1415 00012393 F3AB                <1> 		rep	stosd
  1416 00012395 893D[14010300]      <1> 		mov	[u.sp], edi
  1417 0001239B 89EE                <1> 		mov	esi, ebp
  1418 0001239D B105                <1> 		mov	cl, 5 ; EIP (u), CS (UCODE), EFLAGS (u), ESP (u), SS (UDATA)
  1419 0001239F F3A5                <1> 		rep	movsd
  1420                              <1> 		;
  1421                              <1> 
  1422 000123A1 8B0D[74010300]      <1> 		mov	ecx, [u.pgdir]
  1423 000123A7 890D[68890100]      <1> 		mov	[IRQ_cr3], ecx
  1424                              <1> 
  1425                              <1> set_IRQ_callback_addr:
  1426                              <1> 		;
  1427                              <1> 		; This routine sets return address
  1428                              <1> 		; to start of user's interrupt
  1429                              <1> 		; service (callback) address
  1430                              <1> 		;
  1431                              <1> 		; INPUT:
  1432                              <1> 		;	EDX = callback routine/service address
  1433                              <1> 		;	      (virtual, not physical address!)	
  1434                              <1> 		;	[u.sp] = kernel stack, points to
  1435                              <1> 		;		 user's EIP,CS,EFLAGS,ESP,SS
  1436                              <1> 		;		 registers.
  1437                              <1> 		; OUTPUT:
  1438                              <1> 		;	EIP (user) = callback (service) address
  1439                              <1> 		;	CS (user) = UCODE
  1440                              <1> 		;	EFLAGS (user) = flags before callback 	 
  1441                              <1> 		;       ESP (user) = ESP-4 (user, before callback) 
  1442                              <1> 		;	[ESP](user) = EIP (user) before callback
  1443                              <1> 		;
  1444                              <1> 		; Note: If CPU was in user mode while entering 
  1445                              <1> 		;	the timer interrupt service routine,
  1446                              <1> 		;	'IRET' will get return to callback routine
  1447                              <1> 		;	immediately. If CPU was in system/kernel mode  
  1448                              <1> 		;	'iret' will get return to system call and
  1449                              <1> 		;	then, callback routine will be return address
  1450                              <1> 		;	from system call. (User's callback/service code
  1451                              <1> 		;	will be able to return to normal return address
  1452                              <1> 		;	via a 'sysrele' system call at the end.) 
  1453                              <1> 		;
  1454                              <1> 		; Note: User's IRQ callback service code must be ended
  1455                              <1> 		;	with a 'sysrele' system call !
  1456                              <1> 		;
  1457                              <1> 		;	For example:
  1458                              <1> 		;
  1459                              <1> 		;	audio_IRQ_callback:
  1460                              <1> 		;	    ...	 
  1461                              <1> 		;	    <load DMA buffer with audio data>
  1462                              <1> 		;	    ...
  1463                              <1> 		;	    mov eax, 39 ; 'sysrele'
  1464                              <1> 		;	    int 40h ; TRDOS 386 system call (interrupt)		
  1465                              <1> 		;
  1466                              <1> 		
  1467                              <1> 		;mov	edx, [edx+IRQ.addr] ; Callback service address
  1468                              <1> 		;			    ; (Virtual address)
  1469                              <1> 		
  1470 000123AD 8B2D[14010300]      <1> 		mov	ebp, [u.sp]; kernel's stack, points to EIP (user)
  1471 000123B3 895500              <1> 		mov	[ebp], edx
  1472                              <1> IRQsrv_5:
  1473                              <1> 		; EOI & return
  1474                              <1> 		; 01/08/2020
  1475                              <1> 		; 11/06/2017
  1476                              <1> 		; 10/06/2017 
  1477                              <1> 		;mov	al, [IRQnum]
  1478 000123B6 B020                <1> 		mov	al, 20h ; 01/08/2020
  1479 000123B8 FA                  <1> 		cli
  1480                              <1> 		;cmp	al, 7
  1481 000123B9 803D[6C890100]07    <1> 		cmp	byte [IRQnum], 7 ; 01/08/2020	
  1482 000123C0 7602                <1> 		jna	short IRQsrv_6
  1483                              <1> 		;
  1484                              <1> 		;;mov	al, EOI	; end of interrupt
  1485                              <1> 		;mov	al, 20h ; 01/08/2020
  1486                              <1> 		;cli		; disable interrupts till stack cleared
  1487                              <1> 		;out	INTB00, al ; For controll2 #2
  1488 000123C2 E6A0                <1> 		out	0A0h, al
  1489                              <1> IRQsrv_6:
  1490                              <1> 		;mov	byte [IRQnum], 0 ; reset
  1491                              <1> 		;;mov	al, EOI	; end of interrupt
  1492                              <1> 		;mov	al, 20h ; 01/08/2020
  1493                              <1> 		;cli		; disable interrupts till stack cleared
  1494                              <1> 		;out	INTA00, al ; end of interrupt to 8259 - 1
  1495 000123C4 E620                <1> 		out	20h, al	
  1496                              <1> IRQsrv_7:	
  1497                              <1> 		;; 13/06/2017
  1498                              <1> 		;or	word [ebp+8], 200h ; force enabling interrupts
  1499                              <1> 		;
  1500 000123C6 8B0D[68890100]      <1> 		mov 	ecx, [IRQ_cr3]	; previous content of cr3 register
  1501 000123CC 0F22D9              <1>  		mov	cr3, ecx	; restore cr3 register content
  1502                              <1> 		;
  1503 000123CF 61                  <1> 		popad ; edi,esi,ebp,(icrement esp by 4),ebx,edx,ecx,eax
  1504                              <1> 		;
  1505 000123D0 0FA9                <1> 		pop	gs
  1506 000123D2 0FA1                <1> 		pop	fs
  1507 000123D4 07                  <1> 		pop	es
  1508 000123D5 1F                  <1> 		pop	ds
  1509                              <1> 		;
  1510 000123D6 CF                  <1> 		iretd	; return from interrupt
  1511                              <1> 
  1512                              <1> ; 17/04/2021
  1513                              <1> ; ('get_device_number' procedure is disabled as temporary)
  1514                              <1> 
  1515                              <1> ;get_device_number:
  1516                              <1> ;		; 08/10/2016
  1517                              <1> ;		; 07/10/2016 - TRDOS 386 (TRDOS v2.0)
  1518                              <1> ;		;
  1519                              <1> ;		; This procedure compares name of requested
  1520                              <1> ;		; device with kernel device names and
  1521                              <1> ;		; installable device names. If names match, 
  1522                              <1> ;		; the relevant device index (entry) number 
  1523                              <1> ;		; will be returned the caller (sysopen) 
  1524                              <1> ;		; for the requested device.
  1525                              <1> ;		;
  1526                              <1> ;		; NOTE: Installable device drivers must
  1527                              <1> ;		; be loaded before using 'sysopen'
  1528                              <1> ;		; (opendev) system call.
  1529                              <1> ;		;
  1530                              <1> ;		; INPUT:
  1531                              <1> ;		;    ESI = device name address (ASCIIZ)
  1532                              <1> ;		;         (in kernel's memory space)  
  1533                              <1> ;  		;    max name length = 8 without '/dev/')
  1534                              <1> ;		;    Device name will be capitalized 
  1535                              <1> ;		;    and if there is, '/dev/' will be
  1536                              <1> ;		;    removed from name before comparising)
  1537                              <1> ;		;
  1538                              <1> ;		; OUTPUT:
  1539                              <1> ;		;    cf = 0 -> 
  1540                              <1> ;		;      EAX (AL) = device entry/index number 	 	
  1541                              <1> ;		;    cf = 1 -> device not found (installed)
  1542                              <1> ;		;	       or invalid device name
  1543                              <1> ;		;	       (AL=0)
  1544                              <1> ;		;    device_name = device name address (asciiz)
  1545                              <1> ;			;
  1546                              <1> ;		; Modified registers: EAX, EBX, ESI, EDI
  1547                              <1> ;
  1548                              <1> ;		mov	edi, device_name
  1549                              <1> ;		call 	lodsb_capitalize
  1550                              <1> ;		mov	ah, al
  1551                              <1> ;		cmp	al, '/'
  1552                              <1> ;		jne	short gdn_1
  1553                              <1> ;		mov	edi, device_name
  1554                              <1> ;		call 	lodsb_capitalize
  1555                              <1> ;gdn_0:
  1556                              <1> ;		and	al, al ; 0 ?
  1557                              <1> ;		jz	short gdn_err ; null name after '/'
  1558                              <1> ;gdn_1:
  1559                              <1> ;		cmp	al, 'D'
  1560                              <1> ;		jne	short gdn_2
  1561                              <1> ;		call 	lodsb_capitalize
  1562                              <1> ;		cmp	al, 'E'
  1563                              <1> ;		jne	short gdn_2
  1564                              <1> ;		call 	lodsb_capitalize
  1565                              <1> ;		cmp	al, 'V'
  1566                              <1> ;		jne	short gdn_2			
  1567                              <1> ;		lodsb
  1568                              <1> ;		cmp	al, '/'
  1569                              <1> ;		je	short gdn_4
  1570                              <1> ;gdn_2:
  1571                              <1> ;		cmp	ah, '/'
  1572                              <1> ;		jne	short gdn_5
  1573                              <1> ;gdn_err:		
  1574                              <1> ;		; invalid device name or device not found
  1575                              <1> ;		xor	eax, eax ; 0
  1576                              <1> ;		stc
  1577                              <1> ;		retn
  1578                              <1> ;gdn_3:
  1579                              <1> ;		cmp	al, '/'
  1580                              <1> ;		jne	short gdn_5
  1581                              <1> ;gdn_4:
  1582                              <1> ;		mov	edi, device_name
  1583                              <1> ;		jmp	short gdn_6
  1584                              <1> ;gdn_5:
  1585                              <1> ;		cmp	al, 0
  1586                              <1> ;		je	short gdn_7
  1587                              <1> ;gdn_6:
  1588                              <1> ;		call	lodsb_capitalize
  1589                              <1> ;		cmp	edi, device_name + 8
  1590                              <1> ;		jb	short gdn_3
  1591                              <1> ;		cmp	al, 0
  1592                              <1> ;		jne	short gdn_err
  1593                              <1> ;		cmp	edi, device_name + 1
  1594                              <1> ;		jna	short gdn_err ; null name after '/'
  1595                              <1> ;gdn_7:
  1596                              <1> ;		stosb
  1597                              <1> ;		; zero padding ("NAME",0,0,0,0)
  1598                              <1> ;		cmp	edi, device_name + 8
  1599                              <1> ;		jb	short gdn_7
  1600                              <1> ;gdn_8:
  1601                              <1> ;		; search for kernel device names
  1602                              <1> ;		mov	esi, device_name 
  1603                              <1> ;		mov	edi, KDEV_NAME
  1604                              <1> ;		xor	eax, eax
  1605                              <1> ;gdn_9:
  1606                              <1> ;		cmpsd	
  1607                              <1> ;		jne	short gdn_10
  1608                              <1> ;		cmpsd
  1609                              <1> ;		jne	short gdn_11
  1610                              <1> ;		jmp	short gdn_17 ; match
  1611                              <1> ;gdn_10:
  1612                              <1> ;		cmpsd  ; add esi, 4 & add edi, 4
  1613                              <1> ;gdn_11:
  1614                              <1> ;		mov	esi, device_name
  1615                              <1> ;		inc	al
  1616                              <1> ;		cmp	al, NumOfKernelDevNames
  1617                              <1> ;		jb	short gdn_9
  1618                              <1> ;gdn_12:
  1619                              <1> ;		; search for installable device names
  1620                              <1> ;		; esi = offset device_name 
  1621                              <1> ;		mov	edi, IDEV_NAME
  1622                              <1> ;		sub	al, al ; 0
  1623                              <1> ;gdn_13:
  1624                              <1> ;		cmpsd	
  1625                              <1> ;		jne	short gdn_14
  1626                              <1> ;		cmpsd
  1627                              <1> ;		jne	short gdn_15
  1628                              <1> ;		jmp	short gdn_19 ; match
  1629                              <1> ;gdn_14:
  1630                              <1> ;		cmpsd  ; add esi, 4 & add edi, 4
  1631                              <1> ;gdn_15:
  1632                              <1> ;		mov	esi, device_name
  1633                              <1> ;		inc	al
  1634                              <1> ;		cmp	al, NumOfInstallableDevices
  1635                              <1> ;		jb	short gdn_13
  1636                              <1> ;
  1637                              <1> ;gdn_16: 	; error: invalid device name (not found) !
  1638                              <1> ;		xor	al, al
  1639                              <1> ;		stc
  1640                              <1> ;		retn
  1641                              <1> ;
  1642                              <1> ;gdn_17:	; name match (with one of kernel device names)
  1643                              <1> ;		;
  1644                              <1> ;		; convert KDEV_NAME index to 
  1645                              <1> ;		; KDEV_NUMBER index
  1646                              <1> ;		; (different names are used for same devices)
  1647                              <1> ;		; (example: "COM1" & "TTY8" = device number 18) 
  1648                              <1> ;		mov	ebx, eax ; < 256
  1649                              <1> ;		mov	al, [KDEV_NUMBER+ebx]
  1650                              <1> ;
  1651                              <1> ;		; check if empty dev entry in the list
  1652                              <1> ;		cmp	byte [DEV_OPENMODE+eax], 0
  1653                              <1> ;		ja	short gdn_18 ; it must be already set
  1654                              <1> ;
  1655                              <1> ;		; (re)set device name and access flags
  1656                              <1> ;		; (remain open work will be easy after that)
  1657                              <1> ;		; (NOTE: here, data will be copied to bss section)
  1658                              <1> ;		mov	bl, al
  1659                              <1> ;		sub	edi, 8 ; kernel device name address (data)
  1660                              <1> ;		shl	bx, 2 
  1661                              <1> ;		mov	[DEV_NAME_PTR+ebx], edi ; (all) device names
  1662                              <1> ;		mov	bl, [KDEV_ACCESS+eax] ; kernel dev list (data)
  1663                              <1> ;		mov	[DEV_ACCESS+eax], bl ; (all) device list (bss)
  1664                              <1> ;gdn_18:
  1665                              <1> ;		inc	al ; 1 to NumOfKernelDevNames (<=7Fh)
  1666                              <1> ;		; eax = device index/entry number
  1667                              <1> ;		retn		
  1668                              <1> ;
  1669                              <1> ;gdn_19:	; name match (with one of installable device names)
  1670                              <1> ;		;
  1671                              <1> ;		; al = 0 to NumOfInstallableDevices - 1 (<=7Fh)
  1672                              <1> ;
  1673                              <1> ;		mov	ebx, eax
  1674                              <1> ;		add	bl, NumOfKernelDevices 	; < NUMOFDEVICES	
  1675                              <1> ;
  1676                              <1> ;		; check if empty dev entry in the list
  1677                              <1> ;		cmp	byte [DEV_OPENMODE+ebx], 0
  1678                              <1> ;		ja	short gdn_20 ; it must be already set
  1679                              <1> ;
  1680                              <1> ;		; (re)set device name and access flags
  1681                              <1> ;		; (remain open work will be easy after that)
  1682                              <1> ;		sub	edi, 8 ; installable device name address
  1683                              <1> ;		shl	bx, 2 ;*4
  1684                              <1> ;		mov	[DEV_NAME_PTR+ebx], edi ; (all) device names
  1685                              <1> ;		shr	bx, 2
  1686                              <1> ;		mov	al, [IDEV_FLAGS+eax] ; installable dev list
  1687                              <1> ;		mov	[DEV_ACCESS+ebx], al ; (all) device list
  1688                              <1> ;gdn_20:	
  1689                              <1> ;		mov	al, bl
  1690                              <1> ;		; eax = device index/entry number ; < NUMOFDEVICES  
  1691                              <1> ;		retn
  1692                              <1> 
  1693                              <1> ;lodsb_capitalize:
  1694                              <1> ;	; 07/10/2016 - TRDOS 386 (TRDOS v2.0)
  1695                              <1> ;	; INPUT -> [esi] = character
  1696                              <1> ;	;          edi = destination
  1697                              <1> ;	; OUTPUT -> AL contains capitalized character
  1698                              <1> ;	;	   esi = esi+1
  1699                              <1> ;	;	   edi = edi+1	
  1700                              <1> ;	; 
  1701                              <1> ;	lodsb	
  1702                              <1> ;	cmp	al, 61h
  1703                              <1> ;    	jb	short lodsb_cap_retn
  1704                              <1> ;     	cmp	al, 7Ah
  1705                              <1> ;     	ja	short lodsb_cap_retn
  1706                              <1> ;     	and	al, 0DFh
  1707                              <1> ;lodsb_cap_retn:
  1708                              <1> ;	stosb
  1709                              <1> ;	retn
  1710                              <1> 
  1711                              <1> ; 17/04/2021
  1712                              <1> ; ('device_open' procedure is disabled as temporary)
  1713                              <1> 
  1714                              <1> ;device_open:
  1715                              <1> ;	; 08/10/2016 - TRDOS 386 (TRDOS v2.0)
  1716                              <1> ;	; Complete device opening work for sysopen (device)
  1717                              <1> ;	;
  1718                              <1> ;	; INPUT -> 
  1719                              <1> ;	;	EAX = Device Number (AL)
  1720                              <1> ;	;        CL = Open mode (1 = read, 2 = write)
  1721                              <1> ;	;	 CH = Device access byte (bit 0 = 0)		
  1722                              <1> ;	; OUTPUT ->
  1723                              <1> ;	;	EAX = Device Number	
  1724                              <1> ;	;	CF = 0 -> device has been opened
  1725                              <1> ;	;	CF = 1 -> device could not be opened
  1726                              <1> ;	;
  1727                              <1> ;	;  Modified registers: ebx, (edx, ecx, esi, edi, ebp)
  1728                              <1> ;	;
  1729                              <1> ;
  1730                              <1> ;	mov	ebx, eax
  1731                              <1> ;	shl	bx, 2 ; *4
  1732                              <1> ;
  1733                              <1> ;	test	ch, 80h ; bit 7, installable device driver flag
  1734                              <1> ;	jz	short d_open_2 ; Kernel device
  1735                              <1> ;	; installable device
  1736                              <1> ;d_open_1:
  1737                              <1> ;       jmp	dword [ebx+IDEV_OADDR-4]
  1738                              <1> ;d_open_2:
  1739                              <1> ;	jmp	dword [ebx+KDEV_OADDR-4]
  1740                              <1> 
  1741                              <1> ; 17/04/2021
  1742                              <1> ; ('device_close' procedure is disabled as temporary)
  1743                              <1> 
  1744                              <1> ;device_close:
  1745                              <1> ;	; 08/10/2016 - TRDOS 386 (TRDOS v2.0)
  1746                              <1> ;	; Complete device closing work for sysclose (device)
  1747                              <1> ;	;
  1748                              <1> ;	; INPUT -> 
  1749                              <1> ;	;	EAX = Device Number (AL)
  1750                              <1> ;	;        CL = Open mode (1 = read, 2 = write)
  1751                              <1> ;	;	 CH = Device access byte (bit 0 = 0)		
  1752                              <1> ;	; OUTPUT ->
  1753                              <1> ;	;	EAX = Device Number	
  1754                              <1> ;	;	CF = 0 -> device has been closed
  1755                              <1> ;	;	CF = 1 -> device could not be closed
  1756                              <1> ;	;
  1757                              <1> ;	; Modified registers: ebx, (edx, ecx, esi, edi, ebp)
  1758                              <1> ;	;
  1759                              <1> ;
  1760                              <1> ;	mov	ebx, eax
  1761                              <1> ;	shl	bx, 2 ; *4
  1762                              <1> ;
  1763                              <1> ;	test	ch, 80h ; bit 7, installable device driver flag
  1764                              <1> ;	jz	short d_close_2 ; Kernel device
  1765                              <1> ;	; installable device
  1766                              <1> ;d_close_1:
  1767                              <1> ;       jmp	dword [ebx+IDEV_CADDR-4]
  1768                              <1> ;d_close_2:
  1769                              <1> ;	jmp	dword [ebx+KDEV_CADDR-4]	
  1770                              <1> 
  1771                              <1> ;rnull:
  1772                              <1> ;	; 07/10/2016 - TRDOS 386 (TRDOS v2.0)
  1773                              <1> ;	; read null (read from null device)
  1774                              <1> ;	retn
  1775                              <1> 
  1776                              <1> ;wnull:
  1777                              <1> ;	; 07/10/2016 - TRDOS 386 (TRDOS v2.0)
  1778                              <1> ;	; write null (write to null device)
  1779                              <1> ;	retn
  1780                              <1> 
  1781                              <1> dev_IRQ_service:
  1782                              <1> 	; 12/05/2017
  1783                              <1> 	; 13/04/2017
  1784                              <1> 	; 27/02/2017 - TRDOS 386 (TRDOS v2.0)
  1785                              <1> 	; INPUT ->
  1786                              <1> 	;	AL = IRQ Number (0 to 15)
  1787                              <1> 	;	
  1788 000123D7 53                  <1> 	push	ebx
  1789 000123D8 0FB6D8              <1> 	movzx	ebx, al
  1790 000123DB C0E302              <1> 	shl	bl, 2 ; * 4	
  1791 000123DE 8B9B[E0880100]      <1> 	mov	ebx, [ebx+DEV_INT_HNDLR]
  1792 000123E4 21DB                <1> 	and 	ebx, ebx
  1793 000123E6 7404                <1>         jz	short dIRQ_s_retn
  1794 000123E8 50                  <1> 	push	eax
  1795                              <1> 
  1796 000123E9 FFD3                <1> 	call	ebx
  1797                              <1> 
  1798 000123EB 58                  <1> 	pop	eax
  1799                              <1> dIRQ_s_retn:
  1800 000123EC 5B                  <1> 	pop	ebx
  1801 000123ED C3                  <1> 	retn		
  1802                              <1> 
  1803                              <1> set_dev_IRQ_service:
  1804                              <1> 	; 09/08/2022
  1805                              <1> 	; 29/07/2022 (TRDOS 386 Kernel v2.0.5)
  1806                              <1> 	; 13/04/2017 - TRDOS 386 (TRDOS v2.0)
  1807                              <1> 	;
  1808                              <1> 	; Set Device Interrupt Service
  1809                              <1> 	;
  1810                              <1> 	; INPUT ->
  1811                              <1> 	;	AL = IRQ Number
  1812                              <1> 	;	EBX = Hardware Interrupt Service Address
  1813                              <1> 	;
  1814                              <1> 	; Note: There is not a validation check here
  1815                              <1> 	;	because this procedure is called by
  1816                              <1> 	;	TRDOS 386 kernel !
  1817                              <1> 	;       (Even if a device driver does not exist
  1818                              <1> 	;	this setting may be used by sysaudio
  1819                              <1> 	;	and other system calls for hardware
  1820                              <1> 	;	components which use IRQ method for I/O.)
  1821                              <1> 	;
  1822                              <1> 	;push	esi
  1823 000123EE 0FB6F0              <1> 	movzx	esi, al
  1824                              <1> 	;shl	si, 2 ; * 4	
  1825                              <1> 	; 09/08/2022
  1826 000123F1 C1E602              <1> 	shl	esi, 2 ; * 4
  1827 000123F4 899E[E0880100]      <1> 	mov	[esi+DEV_INT_HNDLR], ebx
  1828                              <1> 	;pop	esi
  1829 000123FA C3                  <1> 	retn		
  1830                              <1> 
  1831                              <1> sysaudio: ; AUDIO FUNCTIONS
  1832                              <1> 	; 19/11/2023 (TRDOS 386 v2.0.7)
  1833                              <1> 	; 29/07/2022 (TRDOS 386 v2.0.5)
  1834                              <1> 	; 12/02/2021 (TRDOS 386 v2.0.3) 
  1835                              <1> 	; 28/07/2020
  1836                              <1> 	; 27/07/2020
  1837                              <1> 	; 10/10/2017
  1838                              <1> 	; 22/06/2017
  1839                              <1> 	; 28/05/2017, 04/06/2017, 05/06/2017, 10/06/2017
  1840                              <1> 	; 01/05/2017, 12/05/2017, 15/05/2017, 20/05/2017
  1841                              <1> 	; 21/04/2017, 22/04/2017, 23/04/2017, 24/04/2017
  1842                              <1> 	; 10/04/2017, 13/04/2017, 14/04/2017, 16/04/2017
  1843                              <1> 	; 03/04/2017 (VIA VT8237R)
  1844                              <1> 	; 01/04/2016 (trdosk6.s -> tdosk8.s)
  1845                              <1> 	; 16/05/2016 - TRDOS 386 (TRDOS v2.0)
  1846                              <1> 	;
  1847                              <1> 	; Inputs:
  1848                              <1> 	;
  1849                              <1> 	;	BH = 0 -> Beep (PC Speaker)
  1850                              <1> 	;	     BL = Duration Counter (1 for 1/64 second)
  1851                              <1> 	;	     CX = Frequency Divisor (1193180/Frequency)
  1852                              <1> 	;		 (1331 for 886 Hz)
  1853                              <1> 	;
  1854                              <1> 	;	01/04/2017	
  1855                              <1> 	;
  1856                              <1> 	; 	BH = 1 -> DETECT (& ENABLE) AUDIO DEVICE
  1857                              <1> 	;	     BL = 0 : PC SPEAKER
  1858                              <1> 	;		  1 : SOUND BLASTER 16
  1859                              <1> 	;		  2 : INTEL AC'97
  1860                              <1> 	;		  3 : VIA VT8237R (VT8233)			 				
  1861                              <1> 	;		  4 : INTEL HDA
  1862                              <1> 	;	      5-FEh : unknown/invalid
  1863                              <1> 	;	        ; 04/06/2017
  1864                              <1> 	;		FFh : Get current audio device id
  1865                              <1> 	;
  1866                              <1> 	; 	BH = 2 -> ALLOCATE AUDIO BUFFER (for user)
  1867                              <1> 	;		ECX = Audio Buffer Size (must be equal to
  1868                              <1> 	;		      the half of DMA buffer size) 
  1869                              <1> 	;		EDX = Virtual Address of the buffer
  1870                              <1> 	;		      (This is not DMA buffer!)
  1871                              <1> 	;
  1872                              <1> 	;	BH = 3 -> INITIALIZE AUDIO DEVICE
  1873                              <1> 	;	     BL = 0,2 -> for Signal Response Byte	 	
  1874                              <1> 	;	     	CL = Signal Response Byte Value (fixed)
  1875                              <1> 	;				if BL = 0
  1876                              <1> 	;	             auto increment of S.R.B. value
  1877                              <1> 	;			 	if BL = 2
  1878                              <1> 	;	        EDX = Signal Response (Return) Byte Address
  1879                              <1> 	;	     	   			
  1880                              <1> 	;	     BL = 1 for CallBack Method	 	
  1881                              <1> 	;	    	EDX = CallBack Service Address (Virtual)
  1882                              <1> 	;
  1883                              <1> 	;	     BL > 2 -> invalid function	
  1884                              <1> 	;
  1885                              <1> 	;	    (Audio buffer must be allocated before
  1886                              <1> 	;	     initialization.) 		
  1887                              <1> 	;
  1888                              <1> 	;	BH = 4 -> START TO PLAY
  1889                              <1> 	;	     BL = Mode
  1890                              <1> 	;		  Bit 0 = mono/stereo (1 = stereo)		
  1891                              <1> 	;		  Bit 1 = 8 bit / 16 bit (1 = 16 bit)
  1892                              <1> 	;	     CX = Sampling Rate (Hz)
  1893                              <1> 	;
  1894                              <1> 	;	BH = 5 -> PAUSE
  1895                              <1> 	;	     BL = Any
  1896                              <1> 	;
  1897                              <1> 	;	BH = 6 -> CONTINUE TO PLAY
  1898                              <1> 	;	     BL = Any
  1899                              <1> 	;
  1900                              <1> 	;	BH = 7 -> STOP
  1901                              <1> 	;	     BL = Any
  1902                              <1> 	;
  1903                              <1> 	;	BH = 8 -> RESET 
  1904                              <1> 	;	     BL = Any
  1905                              <1> 	;
  1906                              <1> 	;	BH = 9 -> CANCEL (CALLBACK or S.R.B. SERVICE)
  1907                              <1> 	;	     BL = Any	
  1908                              <1> 	;	
  1909                              <1> 	;	BH = 10 -> DEALLOCATE AUDIO BUFFER (for user)
  1910                              <1> 	;	     BL = Any
  1911                              <1> 	;
  1912                              <1> 	;	BH = 11 -> SET VOLUME LEVEL
  1913                              <1> 	;	     BL: (Bit 0 to 6)
  1914                              <1> 	;		  0 = Master (Playback, Lineout) volume
  1915                              <1> 	;	     CL = Left Channel Volume
  1916                              <1> 	;	     CH = Right Channel Volume
  1917                              <1> 	;	
  1918                              <1> 	;	     Note: If BL >= 80h (Bit 7 of BL is set),
  1919                              <1> 	;	     volume level will be set for next playing
  1920                              <1> 	;	     (actual volume level will not be changed
  1921                              <1> 	;	     immediately)	
  1922                              <1> 	;
  1923                              <1> 	;	BH = 12 -> DISABLE AUDIO DEVICE
  1924                              <1> 	;	     (reset audio device and unlink dma buffer)	
  1925                              <1> 	;	     BL = Any	  		  	  	
  1926                              <1> 	;
  1927                              <1> 	;    	12/05/2017
  1928                              <1> 	;	BH = 13 -> MAP DMA BUFFER TO USER
  1929                              <1> 	;	    (for direct access to system's dma buffer)
  1930                              <1> 	;
  1931                              <1> 	;	     ECX = map size in bytes 
  1932                              <1> 	;		  (will be rounded up to page borders)
  1933                              <1> 	;	     EDX = Virtual Address of the buffer
  1934                              <1> 	;		  (Will be rounded up to page borders)
  1935                              <1> 	;
  1936                              <1> 	;	05/06/2017	
  1937                              <1> 	;    	04/06/2017
  1938                              <1> 	;	BH = 14 -> GET AUDIO DEVICE INFO
  1939                              <1> 	;	     BL: 0 = Audio Controller Info
  1940                              <1> 	;	     ; 19/11/2023	
  1941                              <1> 	;	     BL: 1 = Audio (AC'97) Codec Info	
  1942                              <1> 	;	     BL > 1 = Invalid for now! 
  1943                              <1> 	;
  1944                              <1> 	;	22/06/2017	
  1945                              <1> 	;	BH = 15 -> GET CURRENT SOUND DATA (for graphics)
  1946                              <1> 	;	     BL: 0 -> PCM OUT data
  1947                              <1> 	;	       > 0 -> Invalid for now! 
  1948                              <1> 	;	     ECX = 0 -> Get DMA Buffer Pointer
  1949                              <1> 	;		 EDX = Not Used
  1950                              <1> 	;	     ECX > 0 -> Byte count for buffer (EDX)	 	
  1951                              <1> 	;	         EDX = Buffer Address (Virtual)	
  1952                              <1> 	;
  1953                              <1> 	;	10/10/2017	
  1954                              <1> 	;	BH = 16 -> UPDATE DMA BUFFER DATA
  1955                              <1> 	;		   (by using the Audio Buffer content)
  1956                              <1> 	;	     BL = 0 : Update dma half buffer in sequence
  1957                              <1> 	;		      (automatic destination)	
  1958                              <1> 	;		  1 : Update 1st half of the dma buffer
  1959                              <1> 	;		  2 : Update 2nd half of the dma buffer
  1960                              <1> 	;		  3-FEh: Invalid!
  1961                              <1> 	;		  FFh = Get current flag value
  1962                              <1> 	;			(Half buffer number -1)
  1963                              <1> 	;
  1964                              <1> 	; Outputs:
  1965                              <1> 	;
  1966                              <1> 	;	For BH = 0 -> Beep
  1967                              <1> 	;	    None
  1968                              <1> 	;
  1969                              <1> 	;	01/04/2017
  1970                              <1> 	;
  1971                              <1> 	; 	For BH = 1 -> DETECT (& ENABLE) AUDIO DEVICE
  1972                              <1> 	;	    AH = 0 : PC SPEAKER
  1973                              <1> 	;		 1 : SOUND BLASTER 16
  1974                              <1> 	;		 2 : INTEL AC'97
  1975                              <1> 	;		 3 : VIA VT8237R (VT8233)			 				
  1976                              <1> 	;		 4 : INTEL HDA
  1977                              <1> 	;	      5-FFh : unknown/invalid
  1978                              <1> 	;	    AL = mode status
  1979                              <1> 	;		 bit 0 = mono /stereo (1 = stereo)
  1980                              <1> 	;		 bit 1 = 8 bit / 16 bit (1 = 16 bit)
  1981                              <1> 	;	    04/06/2017
  1982                              <1> 	;	    EBX = PCI DEVICE/VENDOR ID (if >0)
  1983                              <1> 	;		 (BX = VENDOR ID) 
  1984                              <1> 	;	    (if CF = 1 -> Error code in EAX)
  1985                              <1> 	;
  1986                              <1> 	; 	For BH = 2 -> ALLOCATE AUDIO BUFFER (for user)
  1987                              <1> 	;	    EAX = Physical Address of the buffer
  1988                              <1> 	;	    (if CF = 1 -> Error code in EAX)
  1989                              <1> 	;
  1990                              <1> 	;	For BH = 3 -> INITIALIZE AUDIO DEVICE
  1991                              <1> 	;	    (if CF = 1 -> Error code in EAX)
  1992                              <1> 	;
  1993                              <1> 	;	For BH = 4 -> START TO PLAY
  1994                              <1> 	;	    none (if CF = 1 -> Error code in EAX)	
  1995                              <1> 	;
  1996                              <1> 	;	For BH = 5 -> PAUSE
  1997                              <1> 	;	    none (if CF = 1 -> Error code in EAX)	
  1998                              <1> 	;
  1999                              <1> 	;	For BH = 6 -> CONTINUE TO PLAY
  2000                              <1> 	;	    none (if CF = 1 -> Error code in EAX)	
  2001                              <1> 	;
  2002                              <1> 	;	For BH = 7 -> STOP
  2003                              <1> 	;	    none (if CF = 1 -> Error code in EAX)
  2004                              <1> 	;
  2005                              <1> 	;	For BH = 8 -> RESET 
  2006                              <1> 	;	    none (if CF = 1 -> Error code in EAX)
  2007                              <1> 	;
  2008                              <1> 	;	For BH = 9 -> CANCEL (CALLBACK or S.R.B. SERVICE)
  2009                              <1> 	;	    none (if CF = 1 -> Error code in EAX)
  2010                              <1> 	;	
  2011                              <1> 	;	For BH = 10 -> DEALLOCATE AUDIO BUFFER (for user)
  2012                              <1> 	;	    none (if CF = 1 -> Error code in EAX)
  2013                              <1> 	;
  2014                              <1> 	;	For BH = 11 -> SET VOLUME LEVEL
  2015                              <1> 	;	    none (if CF = 1 -> Error code in EAX)
  2016                              <1> 	;
  2017                              <1> 	;	For BH = 12 -> DISABLE AUDIO DEVICE
  2018                              <1> 	;	    none (if CF = 1 -> Error code in EAX)
  2019                              <1> 	; 
  2020                              <1> 	;    	12/05/2017
  2021                              <1> 	;	For BH = 13 -> MAP DMA BUFFER TO USER
  2022                              <1> 	;	    EAX = Physical Address of the buffer
  2023                              <1> 	;	    (if CF = 1 -> Error code in EAX)	
  2024                              <1> 	;
  2025                              <1> 	;    	04/06/2017
  2026                              <1> 	;	For BH = 14 -> GET AUDIO DEVICE INFO
  2027                              <1> 	;	(for BL = 0) ; 05/06/2017	
  2028                              <1> 	;	    EAX = IRQ Number in AL
  2029                              <1> 	;		  Audio Device Number in AH 
  2030                              <1> 	;	    EBX = DEV/VENDOR ID
  2031                              <1> 	;		 (DDDDDDDDDDDDDDDDVVVVVVVVVVVVVVVV)
  2032                              <1> 	;	    ECX = BUS/DEV/FN 
  2033                              <1> 	;		 (00000000BBBBBBBBDDDDDFFF00000000)
  2034                              <1> 	;	    EDX = NABMBAR/NAMBAR (for AC97)
  2035                              <1> 	;		  (Low word, DX = NAMBAR address)
  2036                              <1> 	;	    EDX = Base IO Addr (DX) for SB16 & VT8233
  2037                              <1> 	;	    (if CF = 1 -> Error code in EAX)	
  2038                              <1> 	;	                 (ERR_DEV_NOT_RDY = 15) 
  2039                              <1> 	;	(for BL = 1) -for AC97- ; 19/11/2023	
  2040                              <1> 	;	    EAX = Extended Audio ID (MX28) in AX
  2041                              <1> 	;	     AX bit 0 - VRA bit
  2042                              <1> 	;	     HW of EAX = PCM output sample rate (HZ)
  2043                              <1> 	;	    EBX = VENDOR ID 1 (BX), VENDOR ID 2 (HW)
  2044                              <1> 	;	    (if CF = 1 -> Error code in EAX)	
  2045                              <1> 	;	                 (ERR_DEV_NOT_RDY = 15)
  2046                              <1> 	;	    Note: EAX & EBX = 0 (for SB16,VIA,HDA)		
  2047                              <1>  	;
  2048                              <1> 	;	22/06/2017	
  2049                              <1> 	;	For BH = 15 -> GET CURRENT SOUND DATA
  2050                              <1> 	;			 (for graphics)
  2051                              <1> 	;	(for BL = 0)
  2052                              <1> 	;	 If ECX input is 0 
  2053                              <1> 	;	    EAX = DMA Buffer Current Position (Offset)
  2054                              <1> 	;	 If ECX input >  0
  2055                              <1> 	;	    EAX = Actual transfer count 		 	
  2056                              <1> 	;	    (Sound samples will be copied from 
  2057                              <1> 	;	     Current DMA Buffer Position to EDX
  2058                              <1> 	;	     virtual address as EAX bytes.)
  2059                              <1> 	;	 ((If CF = 1 ->  Error code in EAX))
  2060                              <1> 	;
  2061                              <1> 	;	10/10/2017	
  2062                              <1> 	;	For BH = 16 -> UPDATE DMA BUFFER DATA
  2063                              <1> 	;	    EAX = 0, if the updated (or current)
  2064                              <1> 	;		     half buffer is DMA half buffer 1
  2065                              <1> 	;	    EAX = 1, if the updated (or current)
  2066                              <1> 	; 		     half buffer is DMA half buffer 2 	  	
  2067                              <1> 	;	    (If CF = 1 -> Error code in EAX)	
  2068                              <1> 	;	
  2069                              <1> 
  2070 000123FB 80FF11              <1> 	cmp	bh, AUDIO1L/4
  2071 000123FE 0F836BA9FFFF        <1> 	jnb	sysret
  2072                              <1> 
  2073 00012404 C0E702              <1> 	shl	bh, 2 ; *4	
  2074 00012407 0FB6F7              <1> 	movzx	esi, bh
  2075                              <1> 
  2076                              <1> 	; 22/04/2017
  2077 0001240A 31C0                <1> 	xor	eax, eax
  2078 0001240C A3[1C010300]        <1> 	mov	[u.r0], eax  ; 0
  2079                              <1> 		
  2080 00012411 FF96[1C240100]      <1> 	call	dword [esi+AUDIO1]
  2081                              <1> 	;jc	error
  2082 00012417 E953A9FFFF          <1> 	jmp	sysret	
  2083                              <1> 
  2084 0001241C [53230000]          <1> AUDIO1:	dd	_beep ; 12/02/2021	
  2085                              <1> 	;dd	beep ; FUNCTION = 0 (bl = Duration Counter
  2086                              <1> 		     ; 		     cx = Frequency Divisor
  2087 00012420 [60240100]          <1> 	dd	soundc_detect
  2088 00012424 [F5240100]          <1> 	dd	sound_alloc
  2089 00012428 [C0250100]          <1> 	dd	soundc_init
  2090 0001242C [6E270100]          <1> 	dd	sound_play
  2091 00012430 [01280100]          <1> 	dd	sound_pause
  2092 00012434 [2B280100]          <1> 	dd	sound_continue
  2093 00012438 [55280100]          <1> 	dd	sound_stop
  2094 0001243C [80280100]          <1> 	dd	soundc_reset
  2095 00012440 [B3280100]          <1> 	dd	soundc_cancel
  2096 00012444 [D9280100]          <1> 	dd	sound_dalloc
  2097 00012448 [04290100]          <1> 	dd	sound_volume
  2098 0001244C [44290100]          <1> 	dd	soundc_disable
  2099 00012450 [B3290100]          <1> 	dd	sound_dma_map
  2100 00012454 [212A0100]          <1> 	dd	soundc_info
  2101 00012458 [A52A0100]          <1> 	dd	sound_data
  2102 0001245C [472B0100]          <1> 	dd	sound_update
  2103                              <1> 	
  2104                              <1> AUDIO1L	EQU	$ - AUDIO1
  2105                              <1> 
  2106                              <1> soundc_detect:
  2107                              <1> 	; FUNCTION = 1
  2108                              <1> 	; bl = Audio device type number 
  2109                              <1> 	; (0 = pc speaker, 1 = sound blaster 16, 2 = intel ac97
  2110                              <1> 	;  3 = via vt823x, 4 = intel HDA, 0FFh = any)
  2111                              <1> 	
  2112                              <1> 	; 04/06/2017
  2113 00012460 8A25[71890100]      <1> 	mov	ah, [audio_device]
  2114 00012466 80FBFF              <1> 	cmp	bl, 0FFh ; get current audio device id
  2115 00012469 7408                <1> 	je	short sysaudio0
  2116                              <1> 
  2117 0001246B 20E4                <1> 	and	ah, ah
  2118 0001246D 741E                <1> 	jz	short soundc_get_dev
  2119                              <1> 
  2120 0001246F 38DC                <1> 	cmp	ah, bl
  2121 00012471 7567                <1> 	jne	short soundc_dev_err
  2122                              <1> 
  2123                              <1> sysaudio0:	
  2124 00012473 A0[A5890100]        <1> 	mov	al, [audio_mode]
  2125                              <1> sysaudio1:
  2126 00012478 A3[1C010300]        <1> 	mov	[u.r0], eax
  2127 0001247D 8B1D[7C890100]      <1> 	mov	ebx, [audio_vendor] ; (DEVICE/VENDOR ID)
  2128 00012483 8B2D[18010300]      <1> 	mov	ebp, [u.usp]
  2129 00012489 895D10              <1> 	mov	[ebp+16], ebx  ; ebx
  2130 0001248C C3                  <1> 	retn
  2131                              <1> 
  2132                              <1> soundc_get_dev:
  2133                              <1> 	; 28/05/2017
  2134                              <1> 	; 03/04/2017, 24/04/2017
  2135 0001248D C605[70890100]00    <1> 	mov	byte [audio_pci], 0
  2136 00012494 80FB03              <1> 	cmp	bl, 3 ; VIA VT8233 (VT8237R) Audio Controller & AC97 Codec
  2137                              <1> 	;jne	short soundc_get_dev_sb
  2138                              <1> 	; 28/05/2017
  2139 00012497 7220                <1> 	jb	short soundc_get_dev_sb
  2140 00012499 773F                <1> 	ja	short soundc_dev_err  ; temporary (28/05/2017)
  2141                              <1> 	;  		
  2142 0001249B E831160000          <1> 	call	DetectVT8233
  2143 000124A0 7238                <1> 	jc	short soundc_dev_err
  2144                              <1> 	; eax = 0
  2145                              <1> 
  2146                              <1> 	;mov	ebx, [audio_vendor]
  2147                              <1> 	; ebx = DEVICE/VENDOR ID
  2148                              <1> 	;	DDDDDDDDDDDDDDDDVVVVVVVVVVVVVVVV
  2149                              <1> 
  2150 000124A2 B003                <1> 	mov	al, 3  ; VIA VT8237R (VT3233) Audio Controller
  2151 000124A4 88C4                <1> 	mov	ah, al
  2152                              <1> 
  2153                              <1> soundc_get_pci_dev_ok: ; 28/05/2017
  2154 000124A6 FE05[70890100]      <1> 	inc	byte [audio_pci] ; = 1
  2155                              <1> soundc_get_dev_ok:
  2156                              <1> 	
  2157                              <1> soundc_get_dev_sb16_ok:
  2158 000124AC A2[71890100]        <1> 	mov	[audio_device], al
  2159 000124B1 8825[A5890100]      <1> 	mov	[audio_mode], ah ; stereo (bit0), 16 bit (bit1) capability	
  2160 000124B7 EBBF                <1> 	jmp	short sysaudio1
  2161                              <1> 
  2162                              <1> soundc_get_dev_sb:
  2163                              <1> 	; 24/04/2017
  2164 000124B9 80FB01              <1> 	cmp	bl, 1 ; Sound Blaster 16
  2165 000124BC 750E                <1> 	jne	short soundc_get_dev_ich ; 28/05/2017
  2166                              <1> 	;
  2167 000124BE E8E71A0000          <1> 	call	DetectSB
  2168 000124C3 7215                <1> 	jc	short soundc_dev_err
  2169 000124C5 B801030000          <1> 	mov	eax, 0301h ; Sound Blaster 16
  2170 000124CA EBE0                <1> 	jmp	short soundc_get_dev_sb16_ok
  2171                              <1> 
  2172                              <1> soundc_get_dev_ich:
  2173                              <1> 	; 28/05/2017
  2174                              <1> 	;cmp	bl, 2 ; Intel AC'97 Audio Controller (ICH)
  2175                              <1> 	;jne	short soundc_dev_err ; Temporary  (28/05/2017)
  2176                              <1> 	;			     ; (Here will be modified just after
  2177                              <1> 	;			     ; new sound card code will be ready!)  	
  2178 000124CC E8EB150000          <1> 	call	DetectICH
  2179 000124D1 7207                <1> 	jc	short soundc_dev_err
  2180                              <1> 	;
  2181 000124D3 B802030000          <1> 	mov	eax, 0302h ; AC'97 (ICH)
  2182 000124D8 EBCC                <1> 	jmp	short soundc_get_pci_dev_ok
  2183                              <1> 
  2184                              <1> soundc_dev_err:
  2185 000124DA B80F000000          <1> 	mov	eax, ERR_DEV_NOT_RDY ; Device not ready !
  2186                              <1> 	; 29/07/2022
  2187                              <1> 	;sub	eax, eax
  2188                              <1> 	;mov	al, ERR_DEV_NOT_RDY
  2189 000124DF EB05                <1> 	jmp	short sysaudio_err
  2190                              <1> 
  2191                              <1> soundc_respond_err:
  2192                              <1> 	; ERR_TIME_OUT ; 'time out !' error	
  2193 000124E1 B819000000          <1> 	mov	eax, ERR_DEV_NOT_RESP ; 'device not responding !' error
  2194                              <1> 	; 29/07/2022
  2195                              <1> 	;sub	eax, eax
  2196                              <1> 	;mov	al, ERR_DEV_NOT_RESP
  2197                              <1> sysaudio_err:
  2198 000124E6 A3[1C010300]        <1> 	mov	[u.r0], eax
  2199 000124EB A3[84010300]        <1> 	mov	[u.error], eax
  2200 000124F0 E95AA8FFFF          <1> 	jmp	error
  2201                              <1> 
  2202                              <1> sound_alloc:
  2203                              <1> 	; FUNCTION = 2
  2204                              <1> 	; ecx = audio buffer size (in bytes)
  2205                              <1> 	; edx = audio buffer address (virtual)
  2206                              <1> 	; 25/11/2023
  2207                              <1> 	; 27/07/2020
  2208                              <1> 	; 28/05/2017
  2209                              <1> 	; 01/05/2017, 15/05/2017
  2210                              <1> 	; 21/04/2017, 24/04/2017
  2211 000124F5 803D[70890100]00    <1> 	cmp	byte [audio_pci], 0
  2212 000124FC 770F                <1> 	ja	short snd_alloc_0
  2213                              <1> 	; Max. 64KB DMA buffer !!!
  2214 000124FE 81F900800000        <1> 	cmp	ecx, 32768
  2215 00012504 760F                <1> 	jna	short snd_alloc_6
  2216                              <1> 	; 25/11/2023
  2217                              <1> sound_buff_error:
  2218 00012506 B82E000000          <1> 	mov	eax, ERR_BUFFER ; Buffer error !
  2219                              <1> 	; 29/07/2022
  2220                              <1> 	;sub	eax, eax
  2221                              <1> 	;mov	al, ERR_BUFFER
  2222 0001250B EBD9                <1> 	jmp	short sysaudio_err
  2223                              <1> snd_alloc_0:	
  2224                              <1> 	; 25/11/2023
  2225                              <1> 	; Max 128KB DMA buffer size (2 half buffers)
  2226 0001250D 81F900000100        <1> 	cmp	ecx, 65536
  2227 00012513 77F1                <1> 	ja	short sound_buff_error
  2228                              <1> snd_alloc_6:
  2229                              <1> 	; 15/05/2017
  2230 00012515 81F900100000        <1> 	cmp	ecx, 4096 ; PAGE_SIZE
  2231 0001251B 72E9                <1> 	jb	short sound_buff_error
  2232                              <1> 	;
  2233 0001251D A1[84890100]        <1> 	mov	eax, [audio_buffer] ; audio buffer address (current)
  2234 00012522 09C0                <1> 	or	eax, eax
  2235 00012524 7446                <1> 	jz	short snd_alloc_2
  2236                              <1> 	; audio buffer exists !
  2237 00012526 8A1D[6D010300]      <1> 	mov	bl, [u.uno]
  2238 0001252C 3A1D[99890100]      <1> 	cmp	bl, [audio_user]
  2239                              <1> 	;jne	sndc_owner_error ; not owner !
  2240                              <1> 	; 25/11/2023
  2241 00012532 7405                <1> 	je	short snd_alloc_7
  2242 00012534 E9FB000000          <1> 	jmp	sndc_owner_error ; not owner !
  2243                              <1> snd_alloc_7:
  2244 00012539 39D0                <1> 	cmp	eax, edx ; same virtual buffer address ?
  2245 0001253B 7508                <1> 	jne	short snd_alloc_1
  2246 0001253D 3B0D[8C890100]      <1> 	cmp	ecx, [audio_buff_size]
  2247 00012543 7469                <1> 	je	short snd_alloc_3 ; Nothing to do !
  2248                              <1> 				  ; Buffer has been set already!
  2249                              <1> snd_alloc_1:
  2250 00012545 51                  <1> 	push	ecx
  2251 00012546 52                  <1> 	push	edx
  2252 00012547 89C3                <1> 	mov	ebx, eax ; audio buffer address (current)
  2253 00012549 8B0D[8C890100]      <1> 	mov	ecx, [audio_buff_size]
  2254 0001254F E8103AFFFF          <1> 	call	deallocate_user_pages
  2255 00012554 5A                  <1> 	pop	edx
  2256 00012555 59                  <1> 	pop	ecx
  2257 00012556 31C0                <1> 	xor	eax, eax ; 0
  2258 00012558 A3[84890100]        <1> 	mov	[audio_buffer], eax  ; 0
  2259 0001255D A3[88890100]        <1>  	mov	[audio_p_buffer], eax  ; 0
  2260 00012562 A3[8C890100]        <1>  	mov	[audio_buff_size], eax
  2261 00012567 A2[99890100]        <1> 	mov	[audio_user], al ; 0
  2262                              <1> snd_alloc_2:
  2263 0001256C 89D3                <1> 	mov	ebx, edx
  2264                              <1> 	; 01/05/2017
  2265                              <1> 	;mov	edx, ~PAGE_OFF ; truncating page offsets
  2266                              <1> 	;		       ; for aligning to page borders	
  2267                              <1> 	;;and	eax, edx
  2268                              <1> 	;and	ebx, edx
  2269                              <1> 	; 26/11/2023
  2270                              <1> 	;and	ecx, edx
  2271 0001256E 81E300F0FFFF        <1> 	and	ebx, ~PAGE_OFF
  2272 00012574 89CA                <1> 	mov	edx, ecx
  2273                              <1> 	; 15/05/2017
  2274                              <1> 	; EAX = Beginning address (physical)
  2275                              <1> 	; EAX = 0 -> Allocate mem block from the 1st proper aperture	
  2276                              <1> 	; ECX = Number of bytes to be allocated		
  2277 00012576 E88B36FFFF          <1> 	call	allocate_memory_block
  2278 0001257B 7289                <1> 	jc	short sound_buff_error
  2279                              <1> 
  2280                              <1> 	; EAX = Physical address of the allocated memory block
  2281                              <1> 	; ECX = Allocated bytes (as rounded up to page border)
  2282                              <1> 	; EBX = Virtual address (as truncated to page border)
  2283 0001257D 52                  <1> 	push	edx ; 26/11/2023
  2284 0001257E 50                  <1> 	push	eax
  2285 0001257F 53                  <1> 	push	ebx
  2286 00012580 51                  <1> 	push	ecx
  2287 00012581 E8C63AFFFF          <1> 	call	allocate_user_pages
  2288 00012586 59                  <1> 	pop	ecx
  2289 00012587 5B                  <1> 	pop	ebx
  2290 00012588 58                  <1> 	pop	eax
  2291 00012589 5A                  <1> 	pop	edx ; 26/11/2023
  2292 0001258A 722A                <1> 	jc	short snd_alloc_4  ; insufficient memory, buff error
  2293                              <1> 	; eax = physical address of the user's audio buffer
  2294                              <1> 	; ebx = virtual address of the user's audio buffer
  2295                              <1> 	; 26/11/2023
  2296                              <1> 	; ecx = allocated buffer size (in bytes)
  2297                              <1> 	;		 -rounded up to page boundary-
  2298                              <1> 	; edx = requested buffer size (in bytes)
  2299 0001258C A3[88890100]        <1> 	mov	[audio_p_buffer], eax
  2300 00012591 891D[84890100]      <1> 	mov	[audio_buffer], ebx
  2301                              <1> 	; 26/11/2023
  2302                              <1> 	;mov	ecx, edx
  2303                              <1> 	;; 25/11/2023
  2304                              <1> 	;cmp	ecx, 65536
  2305                              <1> 	;jb	short snd_alloc_5
  2306                              <1> 	;dec	ecx
  2307                              <1> 	;; ecx = 65535
  2308                              <1> 	;; (DMA half buffer's sample count must be < 65536)
  2309                              <1> ;snd_alloc_5:
  2310                              <1>  	;mov	[audio_buff_size], ecx
  2311                              <1> 	; 26/11/2023
  2312 00012597 8915[8C890100]      <1> 	mov	[audio_buff_size], edx
  2313 0001259D 8A15[6D010300]      <1> 	mov	dl, [u.uno]
  2314 000125A3 8815[99890100]      <1> 	mov	[audio_user], dl
  2315 000125A9 A3[1C010300]        <1> 	mov	[u.r0], eax
  2316                              <1> snd_alloc_3:
  2317                              <1> 	; 27/07/2020
  2318 000125AE C605[98890100]00    <1> 	mov	byte [audio_flag], 0 ; clear dma half buffer flag
  2319                              <1> 	;	
  2320 000125B5 C3                  <1> 	retn
  2321                              <1> snd_alloc_4:
  2322                              <1> 	; 15/05/2017
  2323                              <1> 	; EAX = Beginning address (physical)
  2324                              <1> 	; ECX = Number of bytes to be deallocated
  2325 000125B6 E86B38FFFF          <1> 	call	deallocate_memory_block
  2326 000125BB E946FFFFFF          <1> 	jmp	sound_buff_error ; insufficient memory, buff error
  2327                              <1> 
  2328                              <1> soundc_init:
  2329                              <1> 	; FUNCTION = 3 
  2330                              <1> 	; bl = method (0= s.r.b., 1= callback, 2= auto incr s.r.b.)
  2331                              <1> 	; cl = signal response byte (initial or fixed) value
  2332                              <1> 	; edx = signal response byte or callback address
  2333                              <1> 	; 07/08/2022
  2334                              <1> 	; 29/07/2022
  2335                              <1> 	; 27/07/2020
  2336                              <1> 	; 28/05/2017
  2337                              <1> 	; 12/05/2017, 20/05/2017
  2338                              <1> 	; 22/04/2017, 23/04/2017, 24/04/2017
  2339                              <1> 	; 13/04/2017, 14/04/2017, 16/04/2017, 21/04/2017
  2340                              <1> 	; 03/04/2017, 10/04/2017
  2341                              <1> 
  2342 000125C0 A0[71890100]        <1> 	mov	al, [audio_device]
  2343 000125C5 20C0                <1> 	and	al, al
  2344 000125C7 754A                <1> 	jnz	short sndc_init6
  2345                              <1> 	;
  2346 000125C9 C605[70890100]00    <1> 	mov	byte [audio_pci], 0
  2347 000125D0 52                  <1> 	push	edx
  2348 000125D1 53                  <1> 	push	ebx
  2349 000125D2 51                  <1> 	push	ecx
  2350 000125D3 E8D2190000          <1> 	call	DetectSB
  2351 000125D8 7213                <1> 	jc	short sndc_init8
  2352 000125DA 66B80103            <1> 	mov	ax, 0301h ; Sound Blaster 16
  2353 000125DE EB1E                <1> 	jmp	short sndc_init7
  2354                              <1> 
  2355                              <1> sndc_init11:
  2356                              <1> 	; 28/05/2017
  2357 000125E0 E8D7140000          <1> 	call	DetectICH ; Detect AC'97 (ICH) Audio Controller
  2358 000125E5 7217                <1> 	jc	short sndc_init7
  2359 000125E7 66B80203            <1> 	mov	ax, 0302h ; Intel AC'97 Audio Device
  2360 000125EB EB0B                <1> 	jmp	short sndc_init12 ; (PCI device)
  2361                              <1> 
  2362                              <1> sndc_init8:
  2363 000125ED E8DF140000          <1> 	call	DetectVT8233
  2364                              <1> 	;jc	short sndc_init7
  2365                              <1> 	; 29/07/2022
  2366 000125F2 72EC                <1> 	jc	short sndc_init11 ; 28/05/2017
  2367                              <1> 
  2368                              <1> 	; eax = 0
  2369 000125F4 B003                <1> 	mov	al, 3	; VIA VT8237R (VT3233) Audio Controller
  2370 000125F6 88C4                <1> 	mov	ah, al
  2371                              <1> 
  2372                              <1> sndc_init12:
  2373 000125F8 FE05[70890100]      <1> 	inc	byte [audio_pci] ; = 1
  2374                              <1> sndc_init7:
  2375 000125FE 59                  <1> 	pop	ecx
  2376 000125FF 5B                  <1> 	pop	ebx
  2377 00012600 5A                  <1> 	pop	edx
  2378                              <1> 	;jc	soundc_dev_err
  2379                              <1> 	; 29/07/2022
  2380 00012601 7305                <1> 	jnc	short sndc_init14
  2381 00012603 E9D2FEFFFF          <1> 	jmp	soundc_dev_err
  2382                              <1> sndc_init14:
  2383 00012608 A2[71890100]        <1> 	mov	[audio_device], al
  2384 0001260D 8825[A5890100]      <1> 	mov	[audio_mode], ah ; stereo (bit0), 16 bit (bit1) capability
  2385                              <1> 
  2386                              <1> sndc_init6:
  2387 00012613 833D[84890100]00    <1> 	cmp	dword [audio_buffer], 0
  2388                              <1> 	;jna	sound_buff_error
  2389                              <1> 	; 29/07/2022
  2390 0001261A 7705                <1> 	ja	short sndc_init19
  2391 0001261C E9E5FEFFFF          <1> 	jmp	sound_buff_error ; 07/08/2022
  2392                              <1> sndc_init19:
  2393 00012621 A0[6D010300]        <1> 	mov	al, [u.uno]
  2394 00012626 8A25[99890100]      <1> 	mov	ah, [audio_user]
  2395 0001262C 08E4                <1> 	or	ah, ah
  2396 0001262E 7418                <1> 	jz	short sndc_init0
  2397 00012630 38E0                <1> 	cmp	al, ah
  2398 00012632 7419                <1> 	je	short sndc_init1
  2399                              <1> 
  2400                              <1> sndc_owner_error:
  2401 00012634 B80B000000          <1> 	mov	eax, ERR_NOT_OWNER ; 'permission denied !' error
  2402                              <1> 	; 29/07/2022
  2403                              <1> 	;sub	eax, eax
  2404                              <1> 	;mov	al, ERR_NOT_OWNER
  2405                              <1> sndc_perm_error:
  2406 00012639 A3[1C010300]        <1> 	mov	[u.r0], eax
  2407 0001263E A3[84010300]        <1> 	mov	[u.error], eax
  2408 00012643 E907A7FFFF          <1> 	jmp	error
  2409                              <1> sndc_init0:
  2410 00012648 A2[99890100]        <1> 	mov	[audio_user], al
  2411                              <1> sndc_init1:
  2412 0001264D 8915[9C890100]      <1> 	mov	[audio_cb_addr], edx
  2413 00012653 881D[9A890100]      <1> 	mov	[audio_cb_mode], bl
  2414 00012659 880D[9B890100]      <1> 	mov	[audio_srb], cl
  2415                              <1> 
  2416                              <1> 	; 27/07/2020
  2417                              <1> 	;mov	byte [audio_flag], 0  ; clear dma half buffer flag
  2418                              <1> 
  2419                              <1> 	; 24/04/2017
  2420 0001265F 803D[71890100]03    <1> 	cmp	byte [audio_device], 3 ; VT8233 (VT8237R)
  2421 00012666 7435                <1> 	je	short sndc_init9
  2422                              <1> 	;ja	short soundc_respond_err ; temporary (28/05/2017)
  2423 00012668 803D[71890100]01    <1> 	cmp	byte [audio_device], 1 ; SB 16
  2424 0001266F 7510                <1> 	jne	short sndc_init13
  2425 00012671 BB[BC410100]        <1> 	mov	ebx, sb16_int_handler
  2426                              <1> 	; Note: 'SbInit' is at 'Start to Play' stage
  2427                              <1> 	; 20/05/2017
  2428 00012676 66C705[A8890100]08- <1> 	mov	word [audio_master_volume], 0808h ; 2/8
  2428 0001267E 08                  <1>
  2429 0001267F EB34                <1> 	jmp	short sndc_init10
  2430                              <1> sndc_init13:
  2431                              <1> 	; 28/05/2017
  2432 00012681 803D[71890100]02    <1> 	cmp	byte [audio_device], 2 ; AC 97 (ICH)	
  2433                              <1> 	;jne	soundc_respond_err ; temporary (28/05/2017)
  2434                              <1> 	; 29/07/2022
  2435 00012688 7405                <1> 	je	short sndc_init16
  2436                              <1> sndc_init15:
  2437 0001268A E952FEFFFF          <1> 	jmp	soundc_respond_err
  2438                              <1> sndc_init16:
  2439 0001268F E8721C0000          <1> 	call	ac97_codec_config
  2440                              <1> 	;jc	soundc_respond_err ; codec error !
  2441                              <1> 	; 29/07/2022
  2442 00012694 72F4                <1> 	jc	short sndc_init15
  2443                              <1> 
  2444 00012696 BB[EF440100]        <1> 	mov	ebx, ac97_int_handler
  2445 0001269B EB18                <1> 	jmp	short sndc_init10	
  2446                              <1> 
  2447                              <1> sndc_init9:
  2448                              <1> 	;call	reset_codec
  2449                              <1> 	;; eax = 1
  2450                              <1> 	;call	codec_io_w16 ; w32
  2451 0001269D E884150000          <1> 	call	init_codec ; 28/05/2017
  2452                              <1> 	;jc	soundc_respond_err ; codec error !
  2453                              <1> 	; 29/07/2022
  2454 000126A2 72E6                <1> 	jc	short sndc_init15
  2455                              <1> 
  2456 000126A4 E894170000          <1> 	call	channel_reset
  2457                              <1> 
  2458                              <1> 	; setup the Codec (actually mixer registers) 
  2459 000126A9 E8BB160000          <1>         call    codec_config  ; unmute codec, set rates.
  2460                              <1> 	;jc	soundc_respond_err ; codec error !
  2461                              <1> 	; 29/07/2022
  2462 000126AE 72DA                <1> 	jc	short sndc_init15
  2463                              <1> 
  2464 000126B0 BB[CF3D0100]        <1> 	mov	ebx, vt8233_int_handler
  2465                              <1> sndc_init10:
  2466                              <1> 	; 13/04/2017
  2467 000126B5 A0[72890100]        <1> 	mov	al, [audio_intr] ; IRQ number	
  2468 000126BA E82FFDFFFF          <1> 	call	set_dev_IRQ_service
  2469                              <1> 
  2470                              <1> 	; SETUP (audio) INTERRUPT CALLBACK SERVICE
  2471 000126BF 8A1D[72890100]      <1> 	mov	bl, [audio_intr] ; IRQ number
  2472 000126C5 8A3D[9A890100]      <1> 	mov	bh, [audio_cb_mode]
  2473 000126CB FEC7                <1> 	inc	bh  ; 1 = Signal Response Byte method (fixed value)
  2474                              <1> 		    ; 2 = Callback service method
  2475                              <1> 		    ; 3 = Auto Increment S.R.B. method 	
  2476 000126CD 8A0D[9B890100]      <1> 	mov	cl, [audio_srb]
  2477 000126D3 8B15[9C890100]      <1> 	mov	edx, [audio_cb_addr]
  2478 000126D9 A0[99890100]        <1> 	mov	al, [audio_user]
  2479                              <1> 	; 14/04/2017
  2480 000126DE E8DD040000          <1>  	call	set_irq_callback_service
  2481                              <1> 	; 16/04/2017
  2482 000126E3 A3[1C010300]        <1> 	mov	[u.r0], eax
  2483                              <1> 	;jnc	sysret
  2484 000126E8 7316                <1> 	jnc	short sndc_init2 ; 21/04/2017
  2485                              <1> 	;
  2486 000126EA A3[84010300]        <1> 	mov	dword [u.error], eax
  2487                              <1> 
  2488 000126EF A0[72890100]        <1> 	mov	al, [audio_intr] ; IRQ number	
  2489 000126F4 31DB                <1> 	xor	ebx, ebx ; reset IRQ handler address
  2490 000126F6 E8F3FCFFFF          <1> 	call	set_dev_IRQ_service
  2491                              <1> 
  2492 000126FB E94FA6FFFF          <1> 	jmp	error
  2493                              <1> 
  2494                              <1> sndc_init2:
  2495                              <1> 	; 21/04/2017
  2496 00012700 8B0D[8C890100]      <1> 	mov	ecx, [audio_buff_size] ; audio buffer size
  2497 00012706 D1E1                <1> 	shl	ecx, 1 ; *2
  2498 00012708 A1[90890100]        <1> 	mov	eax, [audio_dma_buff]
  2499 0001270D 21C0                <1> 	and	eax, eax
  2500 0001270F 7415                <1> 	jz	short sndc_init3
  2501                              <1> 
  2502 00012711 8B15[94890100]      <1> 	mov	edx, [audio_dmabuff_size] ; dma buffer size
  2503 00012717 39D1                <1> 	cmp	ecx, edx
  2504 00012719 7428                <1> 	je	short sndc_init5
  2505                              <1> 
  2506 0001271B 87CA                <1> 	xchg	ecx, edx
  2507                              <1> 	; 26/11/2023 
  2508                              <1> 	; round up (always -rounded up- page count is allocated)
  2509                              <1> 	; ((so deallocation must be done for the rounded up value))
  2510                              <1> 	;add	ecx, PAGE_SIZE - 1   ; 4095
  2511                              <1> 	;call	deallocate_memory_block
  2512 0001271D E8FE36FFFF          <1> 	call	deallocate_memory_block_x 
  2513                              <1> 			; deallocate ((ecx+4095)>>12) pages
  2514 00012722 87D1                <1> 	xchg	edx, ecx
  2515 00012724 31C0                <1> 	xor	eax, eax
  2516                              <1> sndc_init3:
  2517                              <1> 	; 12/05/2017
  2518 00012726 803D[71890100]01    <1> 	cmp	byte [audio_device], 1 ; SB 16
  2519 0001272D 7515                <1> 	jne	short sndc_init4
  2520 0001272F C705[90890100]-     <1> 	mov	dword [audio_dma_buff], sb16_dma_buffer
  2520 00012735 [00000200]          <1>
  2521 00012739 C705[94890100]0000- <1> 	mov	dword [audio_dmabuff_size], 65536
  2521 00012741 0100                <1>
  2522                              <1> 	;xor	eax, eax
  2523                              <1> 	;mov	[u.r0], eax ; 0 = no error, successful
  2524                              <1> sndc_init5:	; 29/07/2022
  2525 00012743 C3                  <1> 	retn 
  2526                              <1> 
  2527                              <1> sndc_init4:
  2528                              <1> 	; EAX = Beginning address (physical)
  2529                              <1> 	; EAX = 0 -> Allocate mem block from the 1st proper aperture	
  2530                              <1> 	; ECX = Number of bytes to be allocated	(>0)	
  2531 00012744 E8BD34FFFF          <1> 	call	allocate_memory_block
  2532                              <1> 	;jc	sound_buff_error
  2533                              <1> 	; 29/07/2022
  2534 00012749 7305                <1> 	jnc	short sndc_init17
  2535 0001274B E9B6FDFFFF          <1> 	jmp	sound_buff_error
  2536                              <1> 
  2537                              <1> sndc_init17:	; 29/07/2022
  2538                              <1> 	; set dma buffer address and size parameters
  2539 00012750 A3[90890100]        <1> 	mov	[audio_dma_buff], eax ; dma buffer address
  2540 00012755 890D[94890100]      <1> 	mov	[audio_dmabuff_size], ecx ; dma buffer size
  2541                              <1> ;	; EAX = Beginning (physical) addr of the allocated mem block
  2542                              <1> ;	; ECX = Num of allocated bytes (rounded up to page borders)
  2543                              <1> ;	cmp	byte [audio_pci], 0 ; AC97 audio controller ?
  2544                              <1> ;	ja	short sndc_init4
  2545                              <1> ;
  2546                              <1> ;	; Sound Blaster 16 uses classic DMA
  2547                              <1> ;	mov	edx, eax
  2548                              <1> ;	add	edx, ecx
  2549                              <1> ;	cmp	edx, 1000000h ; 1st 16 MB
  2550                              <1> ;	jna	short sndc_init4
  2551                              <1> ;
  2552                              <1> ;	; error !
  2553                              <1> ;	; restore Memory Allocation Table Content
  2554                              <1> ;	; EAX = Beginning address (physical)
  2555                              <1> ;	; ECX = Number of bytes to be deallocated
  2556                              <1> ;	call	deallocate_memory_block
  2557                              <1> ;	; reset dma buffer address and size parameters
  2558                              <1> ;	xor	eax, eax ; 0
  2559                              <1> ;	mov	[audio_dma_buff], eax ; 0
  2560                              <1> ;	mov	[audio_dmabuff_size], ecx ; 0
  2561                              <1> ;	jmp	sound_buff_error				
  2562                              <1> ;
  2563                              <1> ;sndc_init4:
  2564 0001275B 803D[71890100]03    <1> 	cmp	byte [audio_device], 3
  2565                              <1> 	;jne	short sndc_init5
  2566                              <1> 	; 29/07/2022
  2567 00012762 7505                <1> 	jne	short sndc_init18 ; 28/05/2017
  2568                              <1> 
  2569                              <1> ; 29/07/2022
  2570                              <1> ;	call	set_vt8233_bdl	
  2571                              <1> ;sndc_init5:
  2572                              <1> ;	;sub	eax, eax ; 0
  2573                              <1> ;	;mov	[u.r0], eax ; 0 = no error, successful
  2574                              <1> ;	retn
  2575                              <1> 
  2576 00012764 E90E170000          <1> 	jmp	set_vt8233_bdl
  2577                              <1> 
  2578                              <1> sndc_init18:
  2579                              <1> 	;call	set_ac97_bdl
  2580                              <1> 	;;jmp	short sndc_init5
  2581                              <1> 	;retn
  2582                              <1> 	; 29/07/2022
  2583 00012769 E9BE1C0000          <1> 	jmp	set_ac97_bdl
  2584                              <1> 
  2585                              <1> sound_play:
  2586                              <1> 	; FUNCTION = 4 
  2587                              <1> 	; bl = Mode 
  2588                              <1> 	;      bit 0 = mono/stereo (1 = stereo)		
  2589                              <1> 	;      bit 1 = 8 bit / 16 bit (1 = 16 bit)
  2590                              <1> 	; cx = Sampling Rate (Hz)
  2591                              <1> 
  2592                              <1> 	; 13/06/2017
  2593                              <1> 	; Note: Even if Mode bits are not 11b,
  2594                              <1> 	; 	AC'97 Audio Controller (&Codec)
  2595                              <1> 	;	will play audio samples as 16 bit, stereo
  2596                              <1> 	;	samples.
  2597                              <1> 	;	(Program must fill the audio buffer
  2598                              <1> 	;	as required; 8 bit samples must be converted
  2599                              <1> 	;	to 16 bit samples and mono samples must be
  2600                              <1> 	;	converted to stereo samples...)
  2601                              <1> 	 
  2602                              <1> 	; 30/07/2022	
  2603                              <1> 	; 28/07/2020
  2604                              <1> 	; 27/07/2020	 	
  2605                              <1> 	; 28/05/2017
  2606                              <1> 	; 15/05/2017, 20/05/2017
  2607                              <1> 	; 21/04/2017, 24/04/2017
  2608                              <1> 	; ... device check at first
  2609 0001276E A0[71890100]        <1> 	mov	al, [audio_device]
  2610 00012773 08C0                <1> 	or	al, al ; 0 ; pc speaker or invalid 
  2611                              <1> 	;jz	beeper_gfx ; 'video.s' ; temporary 
  2612                              <1> 	; 30/07/022
  2613 00012775 7505                <1> 	jnz	short snd_play_7
  2614 00012777 E9E8FBFEFF          <1> 	jmp	beeper_gfx
  2615                              <1> 
  2616                              <1> snd_play_7:
  2617                              <1> ;	cmp	al, 3 ; VIA VT 8237R (vt8233)
  2618                              <1> ;	je	short snd_play_1
  2619                              <1> ;	cmp	al, 1 ; SB 16
  2620                              <1> ;	jne	soundc_dev_err ; temporary !
  2621                              <1> ;snd_play_0:
  2622                              <1> 	; ... buffer & (buffer) owner check at second
  2623 0001277C 833D[84890100]00    <1> 	cmp	dword [audio_buffer], 0
  2624                              <1> 	;jna	sound_buff_error
  2625                              <1> 	; 30/07/2022
  2626 00012783 763C                <1> 	jna	short snd_play_4 ; jmp sound_buff_error
  2627 00012785 A0[6D010300]        <1> 	mov	al, [u.uno]
  2628 0001278A 3A05[99890100]      <1> 	cmp	al, [audio_user]
  2629                              <1> 	;jne	sndc_owner_error
  2630                              <1> 	; 30/07/2022
  2631 00012790 7405                <1> 	je	short snd_play_3
  2632 00012792 E99DFEFFFF          <1> 	jmp	sndc_owner_error
  2633                              <1> snd_play_3:
  2634 00012797 66890D[A2890100]    <1> 	mov	[audio_freq], cx ; sample frequency (Hertz)
  2635 0001279E 88D8                <1> 	mov	al, bl
  2636 000127A0 2401                <1> 	and	al, 1 ; mono/stereo (1= stereo)
  2637 000127A2 FEC0                <1> 	inc	al ; channels
  2638 000127A4 A2[A1890100]        <1> 	mov	[audio_stmo], al ; sound channels (1 or 2)
  2639 000127A9 B008                <1> 	mov	al, 8
  2640 000127AB F6C302              <1> 	test	bl, 2 ; bits per sample (1= 16 bit)
  2641 000127AE 7402                <1> 	jz	short snd_play_bps
  2642 000127B0 D0E0                <1> 	shl	al, 1  
  2643                              <1> snd_play_bps:	
  2644 000127B2 A2[A0890100]        <1> 	mov	[audio_bps], al
  2645                              <1> 
  2646                              <1> 	; Transfer ring 3 (user's) audio buffer content to dma buffer
  2647 000127B7 8B3D[90890100]      <1> 	mov	edi, [audio_dma_buff] ; dma buffer (ring 0)
  2648 000127BD 09FF                <1> 	or	edi, edi
  2649                              <1> 	;jz	sound_buff_error
  2650                              <1> 	; 30/07/2022
  2651 000127BF 7505                <1> 	jnz	short snd_play_5
  2652                              <1> snd_play_4:
  2653 000127C1 E940FDFFFF          <1> 	jmp	sound_buff_error
  2654                              <1> snd_play_5:
  2655                              <1> 	; 27/07/2020
  2656 000127C6 8B35[88890100]      <1> 	mov	esi, [audio_p_buffer] ; physical address (ring 3)
  2657                              <1> 	;mov	ecx, [audio_buff_size] ; 15/05/2017
  2658 000127CC 8B0D[94890100]      <1> 	mov	ecx, [audio_dmabuff_size] ; 27/07/2020
  2659                              <1> 	;or	ecx, ecx 
  2660                              <1> 	;jz	sound_buff_error
  2661                              <1> 	; 28/07/2020
  2662 000127D2 D1E9                <1> 	shr	ecx, 1  ; dma half buffer size
  2663                              <1> 
  2664 000127D4 8035[98890100]01    <1> 	xor	byte [audio_flag], 1 ;  0 -> 1, 1 -> 0
  2665 000127DB 7502                <1> 	jnz	short snd_play_0 ; [audio_flag] = 1
  2666                              <1> 				 ; fill dma half buffer 1
  2667                              <1> 	; [audio_flag] = 0
  2668                              <1> 	
  2669                              <1> 	; fill dma half buffer 2
  2670 000127DD 01CF                <1> 	add	edi, ecx
  2671                              <1> 
  2672                              <1> snd_play_0:
  2673                              <1> 	;rep	movsb
  2674 000127DF C1E902              <1> 	shr	ecx, 2  ; convert byte count to dword count
  2675 000127E2 F3A5                <1> 	rep	movsd
  2676                              <1> 
  2677                              <1> 	; here, if [audio_flag] = 0, interrupt handler will update
  2678                              <1> 				; dma half buffer 2 
  2679                              <1> 				; (user's audio buffer data will be 
  2680                              <1> 				; copied into dma half buffer 2) 
  2681                              <1> 	;; 20/05/2017
  2682                              <1> 	;mov	byte [audio_flag], 1 ; next half (on next time)
  2683                              <1> 
  2684                              <1> 	; 24/04/2017
  2685 000127E4 A0[71890100]        <1> 	mov	al, [audio_device]
  2686 000127E9 3C03                <1> 	cmp	al, 3 ; VT8233 (VT8237R) 
  2687 000127EB 7409                <1> 	je	short snd_play_1
  2688 000127ED 3C01                <1> 	cmp	al, 1 ; Sound Blaster 16
  2689 000127EF 750A                <1> 	jne	short snd_play_2  ; 28/05/2017
  2690                              <1> 
  2691                              <1> ; 30/07/2022
  2692                              <1> ;	call	SbInit_play
  2693                              <1> ;	;jc	soundc_respond_err
  2694                              <1> ;	;retn
  2695                              <1> ;	; 30/07/2022
  2696                              <1> ;	jnc	short snd_play_6  ; retn
  2697                              <1> ;	jmp	soundc_respond_err
  2698                              <1> 
  2699                              <1> 	; 30/07/2022
  2700 000127F1 E974180000          <1> 	jmp	SbInit_play	; sb16_start_play
  2701                              <1> 
  2702                              <1> snd_play_1:	
  2703                              <1> 	;call	vt8233_start_play
  2704                              <1> 	;retn
  2705                              <1> 	; 30/07/2022
  2706 000127F6 E9B2160000          <1> 	jmp	vt8233_start_play
  2707                              <1> 
  2708                              <1> snd_play_2:
  2709                              <1> 	; 28/05/2017
  2710                              <1> 	;cmp	al, 2 ; AC'97
  2711                              <1> 	;jne	short snd_play_3
  2712                              <1> 
  2713                              <1> 	;call	ac97_start_play
  2714                              <1> 	;retn
  2715                              <1> 	; 30/07/2022
  2716 000127FB E95F1C0000          <1> 	jmp	ac97_start_play
  2717                              <1> 
  2718                              <1> ;snd_play_3:
  2719                              <1> ;	;call	hda_start_play
  2720                              <1> ;	retn
  2721                              <1> 	; 30/07/2022
  2722                              <1> 	;jmp	hda_start_play
  2723                              <1> 
  2724                              <1> snd_play_6:
  2725                              <1> 	; 30/07/2022
  2726 00012800 C3                  <1> 	retn
  2727                              <1> 
  2728                              <1> sound_pause:
  2729                              <1> 	; FUNCTION = 5
  2730                              <1> 	; Pause
  2731                              <1> 	; 28/05/2017
  2732                              <1> 	; 24/04/2017
  2733                              <1> 	; 22/04/2017
  2734 00012801 E81C030000          <1> 	call	snd_dev_check
  2735 00012806 7277                <1> 	jc	short snd_nothing ; temporary.
  2736 00012808 E822030000          <1> 	call	snd_buf_check
  2737 0001280D 7270                <1> 	jc	short snd_nothing ; temporary.
  2738 0001280F A0[71890100]        <1> 	mov	al, [audio_device]
  2739 00012814 3C03                <1> 	cmp	al, 3 ; VIA VT 8237R (vt8233)
  2740 00012816 7409                <1> 	je	short snd_pause_1
  2741 00012818 3C01                <1> 	cmp	al, 1 ; Sound Blaster 16
  2742 0001281A 750A                <1> 	jne	short snd_pause_2 ; 28/05/2017
  2743 0001281C E91E1A0000          <1> 	jmp	sb16_pause
  2744                              <1> snd_pause_1:
  2745 00012821 E93C170000          <1> 	jmp	vt8233_pause
  2746                              <1> snd_pause_2:
  2747                              <1> 	; 28/05/2017
  2748                              <1> 	;cmp	al, 2 ; AC'97
  2749                              <1> 	;jne	short snd_nothing ; temporary.
  2750 00012826 E9171D0000          <1> 	jmp	ac97_pause
  2751                              <1> 
  2752                              <1> sound_continue:
  2753                              <1> 	; FUNCTION = 6
  2754                              <1> 	; Continue to play
  2755                              <1> 	; 28/05/2017
  2756                              <1> 	; 22/04/2017
  2757 0001282B E8F2020000          <1> 	call	snd_dev_check
  2758 00012830 724D                <1> 	jc	short snd_nothing ; temporary.
  2759 00012832 E8F8020000          <1> 	call	snd_buf_check
  2760 00012837 7246                <1> 	jc	short snd_nothing ; temporary.
  2761 00012839 A0[71890100]        <1> 	mov	al, [audio_device]
  2762 0001283E 3C03                <1> 	cmp	al, 3 ; VIA VT 8237R (vt8233)
  2763 00012840 7409                <1> 	je	short snd_cont_1
  2764 00012842 3C01                <1> 	cmp	al, 1 ; Sound Blaster 16
  2765 00012844 750A                <1> 	jne	short snd_cont_2 ; 28/05/2017
  2766 00012846 E9161A0000          <1> 	jmp	sb16_continue
  2767                              <1> snd_cont_1:
  2768 0001284B E9C4160000          <1> 	jmp	vt8233_play
  2769                              <1> snd_cont_2:
  2770                              <1> 	; 28/05/2017
  2771                              <1> 	;cmp	al, 2 ; AC'97
  2772                              <1> 	;;jne	short snd_nothing ; temporary.
  2773                              <1> 	; 30/07/2022
  2774                              <1> 	;jne	short snd_cont_3
  2775 00012850 E9561C0000          <1> 	jmp	ac97_play
  2776                              <1> ;snd_cont_3:
  2777                              <1> 	;jmp	hda_play
  2778                              <1> 
  2779                              <1> sound_stop:
  2780                              <1> 	; FUNCTION = 7
  2781                              <1> 	; Stop playing
  2782                              <1> 	; 30/07/2022
  2783                              <1> 	; 28/05/2017
  2784                              <1> 	; 24/05/2017
  2785                              <1> 	; 21/04/2017, 22/04/2017, 24/04/2017
  2786 00012855 E8C8020000          <1> 	call	snd_dev_check
  2787 0001285A 7223                <1> 	jc	short snd_nothing ; temporary.
  2788                              <1> 	;call	snd_buf_check
  2789 0001285C E8D7020000          <1> 	call	snd_user_check ; 24/05/2017
  2790 00012861 721C                <1> 	jc	short snd_nothing ; temporary.	
  2791                              <1> 	
  2792 00012863 A0[71890100]        <1> 	mov	al, [audio_device]
  2793 00012868 3C03                <1> 	cmp	al, 3 ; VIA VT 8237R (vt8233)
  2794                              <1> 	;je	vt8233_stop
  2795                              <1> 	;; 28/05/2017
  2796                              <1> 	;;ja	short snd_nothing
  2797                              <1> 	; 30/07/2022
  2798 0001286A 7505                <1> 	jne	short snd_stop_1
  2799 0001286C E9FD150000          <1> 	jmp	vt8233_stop
  2800                              <1> snd_stop_1:
  2801 00012871 3C01                <1> 	cmp	al, 1 ; Sound Blaster 16
  2802                              <1> 	;je	sb16_stop
  2803                              <1> 	; 30/07/2022
  2804 00012873 7505                <1> 	jne	short snd_stop_2
  2805 00012875 E9091A0000          <1> 	jmp	sb16_stop
  2806                              <1> snd_stop_2:
  2807                              <1> 	;cmp	al, 2 
  2808                              <1> 	;;je	short ac97_stop
  2809                              <1> 	; 30/07/2022
  2810                              <1> 	;jne	short snd_stop_3
  2811 0001287A E9951C0000          <1> 	jmp	ac97_stop ; temporary.
  2812                              <1> ;snd_stop_3:
  2813                              <1> 	;jmp	hda_stop
  2814                              <1> 
  2815                              <1> sndc_cancel_ok:
  2816                              <1> 	; 30/07/2022
  2817                              <1> sndc_reset_ok:
  2818                              <1> 	; 30/07/2022
  2819                              <1> snd_nothing:
  2820                              <1> 	; 21/04/2017
  2821 0001287F C3                  <1> 	retn
  2822                              <1> 
  2823                              <1> soundc_reset:
  2824                              <1> 	; FUNCTION = 8
  2825                              <1> 	; Reset Audio Controller
  2826                              <1> 	; 30/07/2022
  2827                              <1> 	; 28/05/2017
  2828                              <1> 	; 22/04/2017
  2829 00012880 E89D020000          <1> 	call	snd_dev_check
  2830 00012885 72F8                <1> 	jc	short snd_nothing ; temporary.
  2831 00012887 E8A3020000          <1> 	call	snd_buf_check
  2832 0001288C 72F1                <1> 	jc	short snd_nothing ; temporary.	
  2833                              <1> 	
  2834 0001288E A0[71890100]        <1> 	mov	al, [audio_device]
  2835                              <1> 	; 30/07/2022
  2836 00012893 3C03                <1> 	cmp	al, 3 ; VIA VT 8237R (vt8233)
  2837 00012895 7207                <1> 	jb	short sndc_reset_1
  2838                              <1> 	;je	vt8233_reset
  2839 00012897 77E6                <1> 	ja	short snd_nothing ; temporary.
  2840                              <1> 	;;ja	hda_reset
  2841                              <1> 	;ja	short sndc_reset_3
  2842                              <1> 	; 30/07/2022
  2843 00012899 E9D0160000          <1> 	jmp	vt8233_reset	
  2844                              <1> sndc_reset_1:
  2845 0001289E 3C01                <1> 	cmp	al, 1 ; Sound Blaster 16
  2846                              <1> 	;jne	ac97_reset	
  2847                              <1> 	; 30/07/2022
  2848 000128A0 750C                <1> 	jne	short sndc_reset_2
  2849 000128A2 E82D1A0000          <1> 	call	sb16_reset
  2850                              <1> 	;jc	soundc_respond_err
  2851                              <1> 	;retn
  2852                              <1> 	; 30/07/2022
  2853 000128A7 73D6                <1> 	jnc	short sndc_reset_ok
  2854 000128A9 E933FCFFFF          <1> 	jmp	soundc_respond_err	
  2855                              <1> sndc_reset_2:
  2856                              <1> 	; 30/07/2022
  2857                              <1> 	;cmp	al, 2
  2858                              <1> 	;ja	short sndc_reset_3
  2859 000128AE E9521D0000          <1> 	jmp	ac97_reset
  2860                              <1> ;sndc_reset_3:
  2861                              <1> 	;jmp	hda_reset
  2862                              <1> 
  2863                              <1> soundc_cancel:
  2864                              <1> 	; FUNCTION = 9
  2865                              <1> 	; Cancel audio callback service
  2866                              <1> 	; 30/07/2022
  2867                              <1> 	; 22/04/2017
  2868 000128B3 A0[99890100]        <1> 	mov	al, [audio_user]	
  2869 000128B8 3A05[6D010300]      <1> 	cmp	al, [u.uno]
  2870 000128BE 75BF                <1> 	jne	short snd_nothing
  2871                              <1> 	; RESET (audio) INTERRUPT CALLBACK SERVICE
  2872 000128C0 8A1D[72890100]      <1> 	mov	bl, [audio_intr] ; IRQ number
  2873 000128C6 A0[6D010300]        <1> 	mov	al, [u.uno]
  2874 000128CB 28FF                <1> 	sub	bh, bh ; 0 ; unlink IRQ from user service
  2875 000128CD E8EE020000          <1>  	call	set_irq_callback_service
  2876                              <1> 	;jc	sndc_perm_error ; 'permission denied' error
  2877                              <1> 	;retn
  2878                              <1> 	; 30/07/2022
  2879 000128D2 73AB                <1> 	jnc	short sndc_cancel_ok
  2880 000128D4 E960FDFFFF          <1> 	jmp	sndc_perm_error
  2881                              <1> 
  2882                              <1> sound_dalloc:
  2883                              <1> 	; FUNCTION = 10
  2884                              <1> 	; Deallocate (ring 3) audio buffer
  2885                              <1> 	; 22/04/2017
  2886 000128D9 A0[99890100]        <1> 	mov	al, [audio_user]	
  2887 000128DE 3A05[6D010300]      <1> 	cmp	al, [u.uno]
  2888 000128E4 7599                <1> 	jne	short snd_nothing
  2889 000128E6 8B1D[84890100]      <1> 	mov	ebx, [audio_buffer]
  2890                              <1> 	;or	ebx, ebx
  2891                              <1> 	;jz	short snd_nothing
  2892 000128EC 8B0D[8C890100]      <1> 	mov	ecx, [audio_buff_size]
  2893 000128F2 E86D36FFFF          <1> 	call	deallocate_user_pages
  2894 000128F7 31C0                <1> 	xor	eax, eax
  2895 000128F9 A3[84890100]        <1> 	mov	[audio_buffer], eax ; 0
  2896 000128FE A2[99890100]        <1> 	mov	[audio_user], al ; 0
  2897                              <1> ;sndc_cancel_ok:
  2898 00012903 C3                  <1> 	retn
  2899                              <1> 
  2900                              <1> sound_volume:
  2901                              <1> 	; FUNCTION = 11
  2902                              <1> 	; Set sound volume level
  2903                              <1> 	; 30/07/2022
  2904                              <1> 	; 28/05/2017
  2905                              <1> 	; 20/05/2017
  2906                              <1> 	; 22/04/2017, 24/04/2017
  2907                              <1> 	; bl = component (0 = master/playback/lineout volume)
  2908                              <1> 	; cl = left channel volume level (0 to 31)
  2909                              <1> 	; ch = right channel volume level (0 to 31)
  2910                              <1> 
  2911 00012904 80FB80              <1> 	cmp	bl, 80h
  2912 00012907 720A                <1> 	jb	short snd_vol_1
  2913                              <1> 	;ja	snd_nothing ; temporary.
  2914                              <1> 	; 30/07/2022
  2915 00012909 7707                <1> 	ja	short snd_vol_0
  2916                              <1> 	; Set volume level for next play (BL>= 80h)
  2917 0001290B 66890D[A8890100]    <1> 	mov	[audio_master_volume], cx
  2918                              <1> snd_vol_0:
  2919 00012912 C3                  <1> 	retn
  2920                              <1> snd_vol_1:
  2921                              <1> 	; set volume level immediate (BL< 80h)
  2922 00012913 80FB00              <1> 	cmp	bl, 0
  2923                              <1> 	;ja	snd_nothing ; temporary.
  2924                              <1> 	; 30/07/2022
  2925 00012916 77FA                <1> 	ja	short snd_vol_0
  2926                              <1> 
  2927 00012918 E805020000          <1> 	call	snd_dev_check
  2928                              <1> 	;jc	snd_nothing ; temporary.
  2929                              <1> 	; 30/07/2022
  2930 0001291D 72F3                <1> 	jc	short snd_vol_0
  2931 0001291F E80B020000          <1> 	call	snd_buf_check
  2932                              <1> 	;jc	snd_nothing ; temporary.
  2933                              <1> 	; 30/07/2022
  2934 00012924 72EC                <1> 	jc	short snd_vol_0	
  2935                              <1> 
  2936 00012926 A0[71890100]        <1> 	mov	al, [audio_device]
  2937 0001292B 3C03                <1> 	cmp	al, 3 ; VIA VT 8237R (vt8233)
  2938                              <1> 	;je	vt8233_volume
  2939                              <1> 	; 30/07/2022
  2940 0001292D 7207                <1> 	jb	short snd_vol_2
  2941                              <1> 	; 28/05/2017
  2942                              <1> 	;ja	snd_nothing ; temporary.
  2943                              <1> 	; 30/07/2022
  2944 0001292F 77E1                <1> 	ja	short snd_vol_0
  2945                              <1> 	;ja	hda_volume
  2946                              <1> 	; 30/07/2022
  2947 00012931 E951160000          <1> 	jmp	vt8233_volume
  2948                              <1> snd_vol_2:	
  2949                              <1> 	; Sound Blaster 16
  2950 00012936 3C01                <1> 	cmp	al, 1 ; SB 16
  2951                              <1> 	;je	sb16_volume
  2952                              <1> 	; 30/07/2022
  2953 00012938 7705                <1> 	ja	short snd_vol_3
  2954 0001293A E9CF180000          <1> 	jmp	sb16_volume
  2955                              <1> snd_vol_3:
  2956                              <1> 	; 30/07/2022
  2957                              <1> 	;cmp	al, 2
  2958                              <1> 	;ja	short snd_vol_4
  2959 0001293F E9831B0000          <1> 	jmp	ac97_volume
  2960                              <1> ;snd_vol_4:
  2961                              <1> 	;jmp	hda_volume
  2962                              <1> 
  2963                              <1> soundc_disable:
  2964                              <1> 	; FUNCTION = 12 
  2965                              <1> 	; Disable audio device (and unlink DMA memory)
  2966                              <1> 	; 30/07/2022
  2967                              <1> 	; 28/05/2017
  2968                              <1> 	; 24/05/2017
  2969                              <1> 	; 22/04/2017
  2970 00012944 E8D9010000          <1> 	call	snd_dev_check
  2971                              <1> 	;jc	soundc_dev_err ; temporary.
  2972                              <1> 	; 30/07/2022
  2973 00012949 7305                <1> 	jnc	short snd_disable_4
  2974 0001294B E98AFBFFFF          <1> 	jmp	soundc_dev_err
  2975                              <1> snd_disable_4:
  2976                              <1> 	;call	snd_buf_check
  2977                              <1> 	;;jc	sndc_owner_error ; temporary.
  2978                              <1> 	; 30/07/2022
  2979                              <1> 	;jnc	short snd_disable_5
  2980                              <1> 	;jmp	sndc_owner_error
  2981                              <1> ;snd_disable_5:
  2982 00012950 A0[71890100]        <1> 	mov	al, [audio_device]
  2983 00012955 3C03                <1> 	cmp	al, 3 ; VIA VT 8237R (vt8233)
  2984 00012957 7414                <1> 	je	short snd_disable_1
  2985                              <1> 	;ja	snd_nothing ; temporary.
  2986                              <1> 	; 30/07/2022
  2987 00012959 7757                <1> 	ja	short snd_disable_3 ; retn
  2988 0001295B 3C01                <1> 	cmp	al, 1 ; Sound Blaster 16
  2989 0001295D 7507                <1> 	jne	short snd_disable_0
  2990 0001295F E81F190000          <1> 	call	sb16_stop
  2991 00012964 EB0C                <1> 	jmp	short snd_disable_2
  2992                              <1> snd_disable_0:
  2993 00012966 E8A91B0000          <1> 	call	ac97_stop
  2994 0001296B EB05                <1> 	jmp	short snd_disable_2
  2995                              <1> snd_disable_1:
  2996 0001296D E8FC140000          <1> 	call	vt8233_stop
  2997                              <1> snd_disable_2:
  2998 00012972 A0[72890100]        <1> 	mov	al, [audio_intr]
  2999 00012977 29DB                <1> 	sub	ebx, ebx ; 0 = reset
  3000 00012979 E870FAFFFF          <1> 	call	set_dev_IRQ_service
  3001                              <1> 
  3002                              <1> 	;mov	al, [audio_intr]
  3003 0001297E 28E4                <1> 	sub	ah, ah ; 0 = reset
  3004 00012980 E830F8FFFF          <1> 	call	set_hardware_int_vector
  3005                              <1> 
  3006 00012985 31C0                <1> 	xor	eax, eax
  3007 00012987 A2[71890100]        <1> 	mov	byte [audio_device], al
  3008 0001298C A2[72890100]        <1> 	mov	byte [audio_intr], al
  3009 00012991 8705[90890100]      <1> 	xchg	eax, [audio_dma_buff]
  3010                              <1> 	; 24/05/2017
  3011                              <1> 	;or	eax, eax
  3012                              <1> 	;jz	short snd_disable_3
  3013                              <1> 	;cmp	eax, sb16_dma_buffer ; default DMA buffer
  3014                              <1> 	;je	short snd_disable_3
  3015 00012997 803D[70890100]00    <1> 	cmp	byte [audio_pci], 0 ; AC97 audio controller ?
  3016 0001299E 7612                <1> 	jna	short snd_disable_3
  3017 000129A0 C605[70890100]00    <1> 	mov	byte [audio_pci], 0
  3018                              <1> 	;sub	ecx, ecx
  3019                              <1> 	;xchg	ecx, [audio_dmabuff_size]
  3020 000129A7 8B0D[94890100]      <1> 	mov	ecx, [audio_dmabuff_size]
  3021                              <1> 	; 26/11/2023 
  3022                              <1> 	; round up (always -rounded up- page count is allocated)
  3023                              <1> 	; ((so deallocation must be done for the rounded up value))
  3024                              <1> 	;add	ecx, PAGE_SIZE - 1   ; 4095
  3025                              <1> 	;call	deallocate_memory_block
  3026 000129AD E86E34FFFF          <1> 	call	deallocate_memory_block_x 
  3027                              <1> 			; deallocate ((ecx+4095)>>12) pages
  3028                              <1> snd_disable_3:
  3029 000129B2 C3                  <1> 	retn
  3030                              <1> 
  3031                              <1> sound_dma_map:
  3032                              <1> 	; FUNCTION = 13 
  3033                              <1> 	; Map audio dma buff addr to user's buffer addr
  3034                              <1> 	; 30/07/2022
  3035                              <1> 	; 12/05/2017
  3036 000129B3 21C9                <1> 	and	ecx, ecx
  3037                              <1> 	;jz	sound_buff_error
  3038                              <1> 	; 30/07/2022
  3039 000129B5 7505                <1> 	jnz	short snd_dma_map_3
  3040 000129B7 E94AFBFFFF          <1> 	jmp	sound_buff_error
  3041                              <1> snd_dma_map_3:
  3042 000129BC 803D[71890100]01    <1> 	cmp	byte [audio_device], 1
  3043 000129C3 722A                <1> 	jb	short snd_dma_map_1
  3044                              <1> snd_dma_map_0:
  3045 000129C5 A1[90890100]        <1> 	mov	eax, [audio_dma_buff]
  3046 000129CA 21C0                <1> 	and	eax, eax
  3047 000129CC 7421                <1> 	jz	short snd_dma_map_1
  3048                              <1> 	;
  3049 000129CE 8A1D[99890100]      <1> 	mov	bl, [audio_user]
  3050 000129D4 08DB                <1> 	or	bl, bl
  3051 000129D6 7417                <1> 	jz	short snd_dma_map_1
  3052 000129D8 3A1D[6D010300]      <1> 	cmp	bl, [u.uno]
  3053                              <1> 	;jne	sndc_owner_error
  3054                              <1> 	; 30/07/2022
  3055 000129DE 7405                <1> 	je	short snd_dma_map_4
  3056 000129E0 E94FFCFFFF          <1> 	jmp	sndc_owner_error
  3057                              <1> snd_dma_map_4:
  3058 000129E5 8B1D[94890100]      <1> 	mov	ebx, [audio_dmabuff_size]
  3059 000129EB 21DB                <1> 	and	ebx, ebx
  3060 000129ED 750A                <1> 	jnz	short snd_dma_map_2
  3061                              <1> snd_dma_map_1:
  3062 000129EF B8[00000200]        <1> 	mov	eax, sb16_dma_buffer
  3063 000129F4 BB00000100          <1> 	mov	ebx, 65536
  3064                              <1> snd_dma_map_2:	
  3065 000129F9 81C1FF0F0000        <1> 	add	ecx, PAGE_SIZE-1 ; 4095
  3066 000129FF 6681E100F0          <1> 	and	cx, ~PAGE_OFF ; not 4095
  3067 00012A04 39D9                <1> 	cmp	ecx, ebx
  3068                              <1> 	;ja	sound_buff_error
  3069                              <1> 	; 30/07/2022
  3070 00012A06 7605                <1> 	jna	short snd_dma_map_6
  3071                              <1> snd_dma_map_5:
  3072 00012A08 E9F9FAFFFF          <1> 	jmp	sound_buff_error
  3073                              <1> snd_dma_map_6:
  3074 00012A0D 50                  <1> 	push	eax
  3075 00012A0E 89D3                <1> 	mov	ebx, edx
  3076 00012A10 C1E90C              <1> 	shr	ecx, 12 ; byte count to page count
  3077                              <1> 	; eax = physical address of (audio) dma buffer
  3078                              <1> 	; ebx = virtual address of (audio) dma buffer (user's pgdir) 
  3079                              <1> 	; ecx = page count (>0)
  3080 00012A13 E87E34FFFF          <1> 	call	direct_memory_access
  3081 00012A18 58                  <1> 	pop	eax
  3082                              <1> 	;jc	sound_buff_error
  3083                              <1> 	; 30/07/2022
  3084 00012A19 72ED                <1> 	jc	short snd_dma_map_5
  3085 00012A1B A3[1C010300]        <1> 	mov	[u.r0], eax
  3086 00012A20 C3                  <1> 	retn
  3087                              <1> 
  3088                              <1> soundc_info:
  3089                              <1> 	; FUNCTION = 14 
  3090                              <1> 	; Get Audio Controller Info
  3091                              <1> 	; 19/11/2023
  3092                              <1> 	; 30/07/2022
  3093                              <1> 	; 10/06/2017
  3094                              <1> 	; 05/06/2017
  3095                              <1> 	
  3096                              <1> 	;and	bl, bl ; 0
  3097                              <1> 	;jz	short sndc_info_0
  3098                              <1> 	
  3099                              <1> 	; 19/11/2023
  3100 00012A21 80FB01              <1> 	cmp	bl, 1
  3101 00012A24 7609                <1> 	jna	short sndc_info_0
  3102                              <1> 
  3103                              <1> ; invalid parameter !
  3104                              <1> ; 30/07/2022
  3105                              <1> 	;mov	eax, ERR_INV_PARAMETER ; 23
  3106                              <1> ;sndc_inf_error:
  3107                              <1> ;	mov	[u.r0], eax
  3108                              <1> ;	mov	[u.error], eax
  3109                              <1> ;	jmp	error
  3110                              <1> 	; 30/07/2022
  3111 00012A26 29C0                <1> 	sub	eax, eax
  3112 00012A28 B017                <1> 	mov	al, ERR_INV_PARAMETER ; 23
  3113 00012A2A E9B7FAFFFF          <1> 	jmp	sysaudio_err
  3114                              <1> 
  3115                              <1> sndc_info_0:
  3116 00012A2F E8EE000000          <1> 	call	snd_dev_check
  3117                              <1> 	;jc	soundc_dev_err
  3118                              <1> 	; 30/07/2022
  3119 00012A34 7305                <1> 	jnc	short sndc_info_3
  3120                              <1> snd_data_dev_err:
  3121 00012A36 E99FFAFFFF          <1> 	jmp	soundc_dev_err
  3122                              <1> sndc_info_3:
  3123                              <1> 	; 19/11/2023
  3124                              <1> 	;cmp	bl, 1
  3125                              <1> 	;je	short sndc_info_4
  3126 00012A3B 20DB                <1> 	and	bl, bl
  3127 00012A3D 7546                <1> 	jnz	short sndc_info_4
  3128                              <1> 
  3129 00012A3F 8B1D[7C890100]      <1> 	mov	ebx, [audio_vendor]
  3130 00012A45 8B0D[78890100]      <1> 	mov	ecx, [audio_dev_id]
  3131                              <1> 	;mov	al,  [audio_device]
  3132 00012A4B 3C02                <1> 	cmp	al, 2 ; AC'97 (ICH)
  3133 00012A4D 7513                <1> 	jne	short sndc_info_1
  3134                              <1> 	; Intel AC97 (ICH) Audio Controller (=2)	
  3135 00012A4F 668B15[76890100]    <1> 	mov	dx, [NABMBAR]
  3136 00012A56 C1E210              <1> 	shl	edx, 16
  3137 00012A59 668B15[74890100]    <1> 	mov	dx, [NAMBAR]
  3138 00012A60 EB07                <1> 	jmp	short sndc_info_2
  3139                              <1> sndc_info_1:
  3140                              <1> 	; 05/06/2017
  3141                              <1> 	; Note: Intel HDA code (here) is not ready yet!
  3142                              <1> 	; !!! SB16 or VT8233 (VT8237R) !!!
  3143 00012A62 0FB715[76890100]    <1> 	movzx	edx, word [audio_io_base]	
  3144                              <1> sndc_info_2:
  3145 00012A69 88C4                <1> 	mov	ah, al ; [audio_device]
  3146 00012A6B A0[72890100]        <1> 	mov	al, [audio_intr] 
  3147                              <1> 
  3148                              <1> 	; EAX = IRQ Number in AL
  3149                              <1> 	;	Audio Device Number in AH 
  3150                              <1> 	; EBX = DEV/VENDOR ID
  3151                              <1> 	;	(DDDDDDDDDDDDDDDDVVVVVVVVVVVVVVVV)
  3152                              <1> 	; ECX = BUS/DEV/FN 
  3153                              <1> 	;	(00000000BBBBBBBBDDDDDFFF00000000)
  3154                              <1> 	; EDX = NABMBAR/NAMBAR (for AC97)
  3155                              <1> 	;	(Low word, DX = NAMBAR address)
  3156                              <1> 	; EDX = Base IO Addr (DX) for SB16 & VT8233
  3157                              <1> 
  3158                              <1> 	; 10/06/2017
  3159 00012A70 A3[1C010300]        <1> 	mov	[u.r0], eax
  3160 00012A75 8B2D[18010300]      <1> 	mov	ebp, [u.usp]
  3161 00012A7B 895D10              <1> 	mov	[ebp+16], ebx  ; ebx
  3162 00012A7E 895514              <1> 	mov	[ebp+20], edx  ; edx
  3163 00012A81 894D18              <1> 	mov	[ebp+24], ecx  ; ecx
  3164                              <1>   			  		
  3165 00012A84 C3                  <1>  	retn
  3166                              <1> 
  3167                              <1> sndc_info_4:
  3168                              <1> 	; 19/11/2023
  3169 00012A85 3C02                <1> 	cmp	al, 2 ; Intel AC97 (ICH) Audio Controller
  3170 00012A87 7413                <1> 	je	short sndc_info_7
  3171                              <1> sndc_info_5:
  3172                              <1> 	; return ZERO if it is not AC97 audio controller codec
  3173 00012A89 31C0                <1> 	xor	eax, eax ; 0
  3174 00012A8B 31DB                <1> 	xor	ebx, ebx ; 0
  3175                              <1> sndc_info_6:	
  3176 00012A8D A3[1C010300]        <1> 	mov	[u.r0], eax
  3177 00012A92 8B2D[18010300]      <1> 	mov	ebp, [u.usp]
  3178 00012A98 895D10              <1> 	mov	[ebp+16], ebx  ; ebx
  3179 00012A9B C3                  <1> 	retn
  3180                              <1> sndc_info_7:
  3181 00012A9C E8311D0000          <1> 	call	ac97_codec_info
  3182 00012AA1 72E6                <1> 	jc	short sndc_info_5
  3183                              <1> 
  3184                              <1> 	; 26/11/2023 - temporary
  3185                              <1> 	;and	al, 0FEh	; clear VRA support bit for test
  3186                              <1> 
  3187 00012AA3 EBE8                <1> 	jmp	short sndc_info_6	
  3188                              <1> 
  3189                              <1> sound_data:
  3190                              <1> 	; FUNCTION = 15 
  3191                              <1> 	; Get Current Sound data for graphics
  3192                              <1> 	; 30/07/2022
  3193                              <1> 	; 22/06/2017
  3194                              <1> 	;
  3195 00012AA5 E878000000          <1> 	call	snd_dev_check
  3196                              <1> 	;jc	soundc_dev_err ; Device not ready !
  3197                              <1> 	; 30/07/2022
  3198 00012AAA 728A                <1> 	jc	short snd_data_dev_err
  3199                              <1> 
  3200 00012AAC 80FB00              <1> 	cmp	bl, 0
  3201 00012AAF 760A                <1> 	jna	short sound_data_0
  3202                              <1> 
  3203                              <1> 	; Only PCM OUT buffer data is valid for now!
  3204 00012AB1 B817000000          <1> 	mov	eax, ERR_INV_PARAMETER  ; 23
  3205 00012AB6 E92BFAFFFF          <1> 	jmp	sysaudio_err
  3206                              <1> 
  3207                              <1> sound_data_0:
  3208 00012ABB A1[90890100]        <1> 	mov	eax, [audio_dma_buff]
  3209 00012AC0 09C0                <1> 	or	eax, eax
  3210                              <1> 	;jz	sound_buff_error
  3211                              <1> 	; 30/07/2022
  3212 00012AC2 741A                <1> 	jz	short sound_data_5
  3213                              <1> 
  3214 00012AC4 803D[71890100]04    <1> 	cmp	byte [audio_device], 4 ; Intel HDA
  3215 00012ACB 744C                <1> 	je	short sound_data_4 ; temporary ! (22/06/2017)
  3216                              <1> 
  3217 00012ACD 21C9                <1> 	and	ecx, ecx
  3218                              <1> 	;jnz	short sound_data_1 ; sample tranfer
  3219                              <1> 	
  3220                              <1> 	; Return only DMA Buffer pointer/offset... 
  3221                              <1> 	; (If DMA Buffer has been mapped to user's
  3222                              <1> 	;  memory space; program can get graphics
  3223                              <1> 	;  data by using only this pointer value.)
  3224                              <1> 	   	
  3225                              <1> 	;call	get_dma_buffer_offset
  3226                              <1> 	;; eax = DMA buffer offset
  3227                              <1> 	;;	(!not half buffer offset!)
  3228                              <1> 	;mov	[u.r0], eax
  3229                              <1> 	;retn
  3230                              <1> 
  3231                              <1> 	;jz	get_dma_buffer_offset
  3232                              <1> 	; 30/07/2022
  3233 00012ACF 7505                <1> 	jnz	short sound_data_1
  3234 00012AD1 E99B1C0000          <1> 	jmp	get_dma_buffer_offset		
  3235                              <1> 	
  3236                              <1> sound_data_1:
  3237                              <1> 	;mov	eax, [audio_dmabuff_size]
  3238                              <1> 	;shr	eax, 1 ; half buffer size
  3239                              <1> 	;cmp	ecx, eax
  3240                              <1> 	;ja	short sound_buff_error	
  3241                              <1> 
  3242 00012AD6 3B0D[94890100]      <1> 	cmp	ecx, [audio_dmabuff_size]
  3243                              <1> 	;ja	sound_buff_error
  3244                              <1> 	; 30/07/2022
  3245 00012ADC 7605                <1> 	jna	short sound_data_6
  3246                              <1> sound_data_5:
  3247 00012ADE E923FAFFFF          <1> 	jmp	sound_buff_error	
  3248                              <1> sound_data_6:
  3249 00012AE3 89D0                <1> 	mov	eax, edx
  3250 00012AE5 25FF0F0000          <1> 	and	eax, PAGE_OFF ; 4095 (0FFFh)
  3251 00012AEA 81F900100000        <1> 	cmp	ecx, 4096
  3252 00012AF0 7604                <1> 	jna	short sound_data_2
  3253                              <1> 	;mov	ecx, 4096 ; max. 1 page
  3254                              <1> 	; 30/07/2022
  3255 00012AF2 31C9                <1> 	xor	ecx, ecx
  3256 00012AF4 B510                <1> 	mov	ch, 16
  3257                              <1> 	; ecx = 4096
  3258                              <1> sound_data_2:
  3259 00012AF6 01C8                <1> 	add	eax, ecx
  3260 00012AF8 3D00100000          <1> 	cmp	eax, 4096
  3261 00012AFD 7606                <1> 	jna	short sound_data_3
  3262 00012AFF 6625FF0F            <1> 	and	ax, PAGE_OFF ; 4095 (0FFFh)
  3263 00012B03 29C1                <1> 	sub	ecx, eax
  3264                              <1> 	; here, ECX has been adjusted to fit 
  3265                              <1> 	;	in page border..  (<= 4096, >0)
  3266                              <1> sound_data_3:
  3267 00012B05 51                  <1> 	push	ecx
  3268 00012B06 52                  <1> 	push	edx
  3269 00012B07 89D3                <1> 	mov	ebx, edx 
  3270 00012B09 E8C32FFFFF          <1> 	call	get_physical_addr
  3271 00012B0E 5A                  <1> 	pop	edx
  3272 00012B0F 59                  <1> 	pop	ecx
  3273                              <1> 	;jc	sound_buff_error
  3274                              <1> 	; 30/07/2022
  3275 00012B10 72CC                <1> 	jc	short sound_data_5	
  3276                              <1> 	
  3277                              <1> 	; eax = physical address of user's buffer
  3278 00012B12 89C3                <1> 	mov	ebx, eax  
  3279                              <1> 	; ecx = byte (transfer) count
  3280                              <1> 	;call	get_current_sound_data
  3281                              <1> 	;retn
  3282 00012B14 E9B61B0000          <1> 	jmp	get_current_sound_data
  3283                              <1> 
  3284                              <1> sound_data_4:
  3285                              <1> 	; Intel HDA code is not ready yet !
  3286                              <1> 	; 22/06/2017
  3287 00012B19 31C0                <1> 	xor	eax, eax
  3288 00012B1B 48                  <1> 	dec	eax
  3289 00012B1C A3[1C010300]        <1> 	mov	[u.r0], eax ; 0FFFFFFFFh
  3290 00012B21 C3                  <1> 	retn 
  3291                              <1> 
  3292                              <1> snd_dev_check:
  3293                              <1> 	; 10/06/2017
  3294                              <1> 	; 05/06/2017
  3295                              <1> 	; 24/05/2017
  3296                              <1> 	; 22/04/2017
  3297                              <1> 	; 21/04/2017
  3298                              <1> 	; ... device check at first
  3299 00012B22 A0[71890100]        <1> 	mov	al, [audio_device]
  3300 00012B27 3C01                <1> 	cmp	al, 1 ; SB 16
  3301 00012B29 7203                <1> 	jb	short snd_dev_chk_retn ; error !
  3302                              <1> 	;cmp	al, 4 ; Intel HDA
  3303                              <1> 	;ja	short snd_dbchk_stc ; invalid !
  3304                              <1> 	; 10/06/2017
  3305 00012B2B 3C05                <1> 	cmp	al, 5
  3306 00012B2D F5                  <1> 	cmc
  3307                              <1> snd_dev_chk_retn:
  3308 00012B2E C3                  <1> 	retn
  3309                              <1> 
  3310                              <1> snd_buf_check:
  3311                              <1> 	; 10/06/2017
  3312                              <1> 	; 22/04/2017
  3313                              <1> 	; 21/04/2017
  3314                              <1> 	; ... buffer & (buffer) owner check at second
  3315 00012B2F 833D[84890100]00    <1> 	cmp	dword [audio_buffer], 0
  3316 00012B36 760D                <1> 	jna	short snd_dbchk_stc
  3317                              <1> snd_user_check:
  3318 00012B38 A0[6D010300]        <1> 	mov	al, [u.uno]
  3319 00012B3D 3A05[99890100]      <1> 	cmp	al, [audio_user]
  3320                              <1> 	;jne	short snd_dbchk_stc
  3321                              <1> 	;retn
  3322 00012B43 74E9                <1> 	je	short snd_dev_chk_retn
  3323                              <1> 
  3324                              <1> snd_dbchk_stc:
  3325 00012B45 F9                  <1> 	stc
  3326 00012B46 C3                  <1> 	retn
  3327                              <1> 
  3328                              <1> sound_update:
  3329                              <1> 	; FUNCTION = 16 
  3330                              <1> 	; bl = 
  3331                              <1> 	;    0 = automatic (sequental) update (with flag switch!)
  3332                              <1> 	;    1 = update dma half buffer 1 (without flag switch!)		
  3333                              <1> 	;    2 = update dma half buffer 2 (without flag switch!)
  3334                              <1> 	;  FFh = get current flag value	
  3335                              <1> 	;      0 = dma half buffer 1 (will be played next)
  3336                              <1> 	;      1 = dma half buffer 2 (will be played next)
  3337                              <1> 	
  3338                              <1> 	; 30/07/2022
  3339                              <1> 	; 10/10/2017
  3340                              <1> 	; ... device check at first
  3341 00012B47 A0[71890100]        <1> 	mov	al, [audio_device]
  3342 00012B4C 08C0                <1> 	or	al, al ; 0 ; pc speaker or invalid 
  3343                              <1> 	;jz	soundc_dev_err
  3344                              <1> 	; 30/07/2022
  3345 00012B4E 7505                <1> 	jnz	short snd_update_4
  3346 00012B50 E985F9FFFF          <1> 	jmp	soundc_dev_err
  3347                              <1> snd_update_4:
  3348                              <1> 	; ... buffer & (buffer) owner check at second
  3349 00012B55 833D[84890100]00    <1> 	cmp	dword [audio_buffer], 0
  3350                              <1> 	;jna	sound_buff_error
  3351                              <1> 	; 30/07/2022
  3352 00012B5C 761C                <1> 	jna	short snd_update_6 ; jmp sound_buff_error
  3353 00012B5E A0[6D010300]        <1> 	mov	al, [u.uno]
  3354 00012B63 3A05[99890100]      <1> 	cmp	al, [audio_user]
  3355                              <1> 	;jne	sndc_owner_error
  3356                              <1> 	; 30/07/2022
  3357 00012B69 7405                <1> 	je	short snd_update_5
  3358 00012B6B E9C4FAFFFF          <1> 	jmp	sndc_owner_error
  3359                              <1> snd_update_5:
  3360                              <1> 	; Transfer ring 3 (user's) audio buffer content to dma buffer
  3361 00012B70 8B3D[90890100]      <1> 	mov	edi, [audio_dma_buff] ; dma buffer (ring 0)
  3362 00012B76 09FF                <1> 	or	edi, edi
  3363                              <1> 	;jz	sound_buff_error
  3364                              <1> 	; 30/07/2022
  3365 00012B78 7505                <1> 	jnz	short snd_update_7
  3366                              <1> snd_update_6:
  3367 00012B7A E987F9FFFF          <1> 	jmp	sound_buff_error
  3368                              <1> snd_update_7:
  3369 00012B7F 8B35[88890100]      <1> 	mov	esi, [audio_p_buffer] ; physical address (ring 3)
  3370 00012B85 8B0D[8C890100]      <1> 	mov	ecx, [audio_buff_size]
  3371                              <1> 	
  3372                              <1> 	;movzx	eax, byte [audio_flag]
  3373 00012B8B A0[98890100]        <1> 	mov	al, [audio_flag]
  3374                              <1> 
  3375 00012B90 FEC3                <1> 	inc	bl
  3376 00012B92 7426                <1> 	jz	short snd_update_3 ; bl = 0FFh
  3377 00012B94 FECB                <1> 	dec	bl 
  3378 00012B96 7410                <1> 	jz	short snd_update_0 ; bl = 0
  3379                              <1> 
  3380 00012B98 80FB02              <1> 	cmp	bl, 2
  3381 00012B9B 7416                <1> 	je	short snd_update_1 ; dma half buffer 2
  3382 00012B9D 7216                <1> 	jb	short snd_update_2 ; dma half buffer 1
  3383                              <1>  
  3384                              <1> 	; invalid parameter !
  3385                              <1> ; 30/07/2022
  3386                              <1> 	;mov	eax, ERR_INV_PARAMETER ; 23
  3387                              <1> ;	mov	[u.r0], eax
  3388                              <1> ;	mov	[u.error], eax
  3389                              <1> ;	jmp	error
  3390                              <1> 
  3391                              <1> 	; 30/07/2022
  3392 00012B9F 29C0                <1> 	sub	eax, eax
  3393 00012BA1 B017                <1> 	mov	al, ERR_INV_PARAMETER ; 23
  3394 00012BA3 E93EF9FFFF          <1> 	jmp	sysaudio_err
  3395                              <1> 	
  3396                              <1> snd_update_0:
  3397 00012BA8 8035[98890100]01    <1> 	xor	byte [audio_flag], 1 ; update flag !!!
  3398 00012BAF 3C01                <1> 	cmp	al, 1
  3399 00012BB1 7202                <1> 	jb	short snd_update_2 ; dma half buffer 1
  3400                              <1> snd_update_1:
  3401                              <1> 	; dma half buffer 2
  3402 00012BB3 01CF                <1> 	add	edi, ecx
  3403                              <1> snd_update_2:
  3404                              <1> 	;rep	movsb
  3405 00012BB5 C1E902              <1> 	shr	ecx, 2
  3406 00012BB8 F3A5                <1> 	rep	movsd
  3407                              <1> snd_update_3:
  3408 00012BBA A3[1C010300]        <1> 	mov	[u.r0], eax
  3409                              <1> 
  3410 00012BBF C3                  <1> 	retn
  3411                              <1> 
  3412                              <1> set_irq_callback_service:
  3413                              <1> 	; 23/11/2023
  3414                              <1> 	; 20/11/2023 (TRDOS 386 Kernel v2.0.7)
  3415                              <1> 	; 30/07/2022 (TRDOS 386 Kernel v2.0.5)
  3416                              <1> 	; 03/08/2020
  3417                              <1> 	; 10/06/2017
  3418                              <1> 	; 12/05/2017
  3419                              <1> 	; 24/04/2017
  3420                              <1> 	; 22/04/2017
  3421                              <1> 	; caller: 'syscalbac' or 'sysaudio' or ...
  3422                              <1> 	; 13/04/2017, 14/04/2017, 17/04/2017
  3423                              <1> 	; 24/02/2017, 26/02/2017, 28/02/2017
  3424                              <1> 	; 21/02/2017 - TRDOS 386 (TRDOS v2.0)
  3425                              <1> 	;
  3426                              <1> 	; Link or unlink IRQ callback service to/from user (ring 3)	
  3427                              <1> 	;
  3428                              <1> 	; INPUT ->
  3429                              <1> 	;	If AL = 0, the caller is 'syscalbac';
  3430                              <1> 	;	   otherwise, the caller is 'sysaudio' or ...
  3431                              <1> 	;	   (AL = user number) 
  3432                              <1> 	; 	 
  3433                              <1> 	;	BL = IRQ number (Hardware interrupt request number)
  3434                              <1> 	;	     (0 to 15 but IRQ 0,1,2,6,8,14,15 are prohibited)
  3435                              <1> 	;	     IRQ numbers 3,4,5,7,9,10,11,12,13 are valid
  3436                              <1> 	;	     (numbers >15 are invalid)
  3437                              <1> 	;
  3438                              <1> 	;	BH = 0 = Unlink IRQ (in BL) from user (ring 3) service
  3439                              <1> 	;	     1 = Link IRQ by using Signal Response Byte method
  3440                              <1> 	;	     2 = Link IRQ by using Callback service method 		
  3441                              <1> 	;	     3 = Link IRQ by using Auto Increment S.R.B. method 	
  3442                              <1> 	;	    >3 = invalid 
  3443                              <1> 	;		 (syscallback version will return to user) 	
  3444                              <1> 	;	
  3445                              <1> 	;	CL = Signal Return/Response Byte value 
  3446                              <1> 	;
  3447                              <1> 	;	If BH = 3, kernel will put a counter value ; 03/08/2020
  3448                              <1> 	;	          (into the S.R.B. addr)
  3449                              <1> 	;		  between 0 to 255. (start value = CL+1)
  3450                              <1> 	;	
  3451                              <1> 	;	NOTE: counter value, for example: even and odd numbers
  3452                              <1> 	;	      may be used for -audio- DMA buffer switch 
  3453                              <1> 	;	      within double buffer method, etc. 		
  3454                              <1> 	;
  3455                              <1> 	;	EDX = Signal return (Response) byte address
  3456                              <1> 	;	       		  - or -
  3457                              <1> 	;	      Interrupt/Callback service/routine address
  3458                              <1> 	; 	
  3459                              <1> 	;	      (virtual address in user's memory space)
  3460                              <1> 	;
  3461                              <1> 	; OUTPUT ->
  3462                              <1> 	;	CF = 0 & EAX = 0 -> Successful setting
  3463                              <1> 	;	CF = 1 & EAX > 0 -> IRQ is prohibited or locked 
  3464                              <1> 	;			by another process
  3465                              <1> 	;		 eax = ERR_PERM_DENIED -> prohibited or locked
  3466                              <1> 	;		 eax = ERR_INV_PARAMETER -> 
  3467                              <1> 	;		       invalid parameter/option or bad address
  3468                              <1> 	;
  3469                              <1> 	; TRDOS 386 - IRQ CALLBACK structures (parameters):
  3470                              <1> 	;	
  3471                              <1> 	;	   [u.irqlock]	: 1 word, IRQ flags (0-15) that indicates
  3472                              <1> 	;			which IRQs are locked by (that) user.
  3473                              <1> 	;		        Lock and unlock (by user) will change
  3474                              <1> 	;			these flags or 'terminate process' (sysexit)
  3475                              <1> 	;			will clear these flags and unlock those IRQs.
  3476                              <1> 	;			               
  3477                              <1> 	;		   	Bit 0 is for IRQ 0 and Bit 15 is for IRQ 15
  3478                              <1> 	;
  3479                              <1> 	;	   IRQ(x).owner	: 1 byte, user, [u.uno], 0 = free (unlocked)	
  3480                              <1> 	;
  3481                              <1> 	;	   IRQ(x).method : 1 byte for callback method & status
  3482                              <1> 	;			   0 = Signal Response Byte method
  3483                              <1> 	;			   1 = Callback service method
  3484                              <1> 	;			   >1 = invalid for current 'syscalback'.
  3485                              <1> 	;			or(+) 80h = IRQ is in use by system (ring 0)
  3486                              <1> 	;			            function (audio etc.) or
  3487                              <1> 	;			   	    a device driver.	   	
  3488                              <1> 	;			(system function will ignore the lock/owner)
  3489                              <1> 	;
  3490                              <1> 	;	   IRQ(x).srb	: 1 byte, Signal Return/Response byte value
  3491                              <1> 	;			  (a fixed value by user or a counter value
  3492                              <1> 	;			 from 0 to 255, which is increased by every
  3493                              <1> 	;			 interrupt just before putting it into 
  3494                              <1> 	;			 the Signal Response byte address)
  3495                              <1> 	;			 (This is not used in callback serv method)
  3496                              <1> 	;	    	  
  3497                              <1> 	;	   IRQ(x).addr	: 1 dword
  3498                              <1> 	;			  Signal Response Byte address (physical)
  3499                              <1> 	;			  		-or-
  3500                              <1> 	;			  Callback service address (virtual)
  3501                              <1> 	;
  3502                              <1> 	;	   IRQ(x).dev	: 1 byte
  3503                              <1> 	;			  0 = Default device or kernel function
  3504                              <1> 	;			  		-or-
  3505                              <1> 	;			  1-255 = Assigned device driver number
  3506                              <1> 	;
  3507                              <1> 	;	   (x) = 3,4,5,7,9,10,11,12,13
  3508                              <1> 	;
  3509                              <1> 	
  3510 00012BC0 80FB0F              <1> 	cmp	bl, 15
  3511 00012BC3 7727                <1> 	ja	short scbs_2
  3512                              <1> 	
  3513 00012BC5 80FF03              <1> 	cmp	bh, 3
  3514 00012BC8 7722                <1> 	ja	short scbs_2  ; invalid parameter
  3515                              <1> 
  3516 00012BCA 0FB6FB              <1> 	movzx	edi, bl ; save IRQ number
  3517                              <1> 
  3518                              <1> 		; IRQ 0,1,2,6,8,14,15 are prohibited
  3519                              <1> 	;IRQenum: ; 'trdosk9.s'
  3520                              <1> 	;	db  0,0,0,1,2,3,0,4,0,5,6,7,8,9,0,0
  3521                              <1> 
  3522 00012BCD 0FB6B7[E2360100]    <1> 	movzx	esi, byte [edi+IRQenum] ; IRQ availability 
  3523                              <1> 					; enumeration/index
  3524                              <1> 	; 20/11/2023
  3525 00012BD4 4E                  <1> 	dec	esi
  3526                              <1> 	;dec	si
  3527 00012BD5 780F                <1> 	js	short scbs_1 ;  0 -> 0FFFFh  
  3528                              <1> 
  3529                              <1> 	; ESI = IRQ callback parameters index number (0 to 8)
  3530                              <1> 
  3531 00012BD7 08FF                <1> 	or	bh, bh
  3532 00012BD9 7417                <1> 	jz	short scbs_4 ; unlink the IRQ (in BL)
  3533                              <1> 
  3534 00012BDB FECF                <1> 	dec	bh
  3535                              <1> 	; bh = method (0 = signal response byte, 1 = callback)
  3536                              <1> 	;	      (2 = auto increment of signal response byte) 
  3537                              <1> 
  3538 00012BDD 80BE[20890100]00    <1> 	cmp	byte [esi+IRQ.owner], 0 ; locked ?
  3539 00012BE4 7635                <1> 	jna	short scbs_6	; no... OK...	
  3540                              <1> 
  3541                              <1> scbs_1:
  3542                              <1> 	; permission denied (prohibited IRQ)
  3543                              <1> 	;mov	eax, ERR_PERM_DENIED
  3544                              <1> 	; 30/07/2022
  3545 00012BE6 29C0                <1> 	sub	eax, eax
  3546 00012BE8 B00B                <1> 	mov	al, ERR_PERM_DENIED
  3547 00012BEA F9                  <1> 	stc
  3548 00012BEB C3                  <1> 	retn
  3549                              <1> scbs_2:
  3550                              <1> 	;stc
  3551                              <1> scbs_3:
  3552                              <1> 	;mov	eax, ERR_INV_PARAMETER
  3553                              <1> 	; 30/07/2022
  3554 00012BEC 29C0                <1> 	sub	eax, eax
  3555 00012BEE B017                <1> 	mov	al, ERR_INV_PARAMETER
  3556 00012BF0 F9                  <1> 	stc
  3557 00012BF1 C3                  <1> 	retn
  3558                              <1> 
  3559                              <1> scbs_4: ; unlink the requested IRQ (if it belongs to current user)
  3560                              <1> 	; 10/06/2017
  3561                              <1> 	; 22/04/2017
  3562                              <1> 	; 14/04/2017
  3563                              <1> 	; If AL = 0 -> The caller is 'syscalbac'
  3564 00012BF2 8AA6[20890100]      <1> 	mov	ah, [esi+IRQ.owner]
  3565 00012BF8 3A25[6D010300]      <1> 	cmp	ah, [u.uno]
  3566 00012BFE 75E6                <1> 	jne	short scbs_1
  3567                              <1> 
  3568 00012C00 FE0D[92010300]      <1> 	dec	byte [u.irqc] ; decrease IRQ count (in use)
  3569                              <1> 
  3570                              <1> 	;sub	ah, ah
  3571                              <1> 	;mov	[esi+IRQ.owner], ah ; 0 ; free !!!
  3572                              <1> 	;and	byte [esi+IRQ.method], 80h
  3573                              <1> 	;mov	[esi+IRQ.srb], ah ; 0
  3574                              <1> 	;mov	[esi+IRQ.dev], ah ; 0
  3575                              <1> 	;mov	dword [esi+IRQ.addr], 0
  3576                              <1> 	;mov	dword [u.r0], 0
  3577                              <1> 
  3578                              <1> 	;mov	byte [esi+IRQ.owner], 0
  3579                              <1> 
  3580                              <1> 	; 22/04/2017
  3581 00012C06 29C0                <1> 	sub	eax, eax
  3582 00012C08 8886[20890100]      <1> 	mov	[esi+IRQ.owner], al ; 0
  3583                              <1> 	; 10/06/2017
  3584 00012C0E 8686[32890100]      <1> 	xchg	al, [esi+IRQ.method]
  3585 00012C14 2480                <1> 	and	al, 80h
  3586 00012C16 745D                <1> 	jz	short scbs_12 
  3587                              <1> 	; Audio device must be disabled -later- ! ([IRQ.medhod] = 80h)
  3588                              <1> 
  3589                              <1> ;	cmp	byte [esi+IRQ.method], 80h ; device drv or kernel extension ?
  3590                              <1> ;	jb	short scbs_12 ; bh = 0 reset to default IRQ handler
  3591                              <1> ;
  3592                              <1> ;	and	al, al
  3593                              <1> ;	jz	short scbs_5  ; the caller is 'syscalbac'
  3594                              <1> ;	; The caller is 'sysaudio' or ...
  3595 00012C18 30C0                <1> 	xor	al, al
  3596                              <1> ;	mov	[esi+IRQ.method], al ; 0 ; reset kernel extension flag
  3597                              <1> ;scbs_5:
  3598                              <1> ;	sub	ah, ah
  3599                              <1> 	;mov	[u.r0], eax ; 0
  3600 00012C1A C3                  <1> 	retn	
  3601                              <1> 
  3602                              <1> scbs_6:
  3603                              <1> 	; 14/04/2017
  3604 00012C1B 20C0                <1> 	and	al, al
  3605 00012C1D 7405                <1> 	jz	short scbs_7  ; the caller is 'syscalbac'
  3606                              <1> 	; AL = user number ([u.uno] or [audio.user] or ...)
  3607                              <1> 	; The caller is 'sysaudio' or ...
  3608                              <1> 	;	
  3609                              <1> 	; bh = method (0 = signal response byte, 1 = callback)
  3610                              <1> 	;	      (2 = auto increment of signal response byte) 
  3611                              <1> 
  3612 00012C1F 80CF80              <1> 	or	bh, 80h		; Kernel extension flag !
  3613 00012C22 EB0A                <1> 	jmp	short scbs_8
  3614                              <1> scbs_7:	
  3615 00012C24 8A86[32890100]      <1> 	mov	al, [esi+IRQ.method] ; >= 80h = kernel is using this IRQ
  3616 00012C2A 2480                <1> 	and	al, 80h ; use only bit 7 (kernel function flag)
  3617 00012C2C 08C7                <1> 	or	bh, al		 ; method 
  3618                              <1> 				 ; 0 = signal response byte, 1 = callback
  3619                              <1> 				 ; 2 = auto increment of s.r.b.
  3620                              <1> scbs_8:
  3621 00012C2E A0[6D010300]        <1> 	mov	al, [u.uno] ; user (process) number (1 to 16)
  3622 00012C33 8886[20890100]      <1> 	mov	[esi+IRQ.owner], al ; lock the IRQ for user
  3623 00012C39 88BE[32890100]      <1> 	mov	[esi+IRQ.method], bh
  3624                              <1> 
  3625                              <1> ;	test	bh, 1
  3626                              <1> ;	jnz	short scbs_9 	 ; Callback method, CX will not be used 
  3627                              <1> ;			
  3628                              <1> ;	test	bh, 2		 ; use auto increment (counter) method
  3629                              <1> ;	jz	short scbs_10	 ; (count can be used for buffer switch)
  3630                              <1> ;scbs_9:
  3631                              <1> ;	xor	ecx, ecx ; 0
  3632                              <1> 
  3633                              <1> scbs_10:			      	
  3634                              <1> 	;mov	[esi+IRQ.method], bh
  3635 00012C3F 888E[3B890100]      <1> 	mov	[esi+IRQ.srb], cl
  3636 00012C45 C686[29890100]00    <1> 	mov	byte [esi+IRQ.dev], 0 ; device number is always 0 
  3637                              <1> 				 ; for this system call
  3638                              <1> 	;test	bh, 1
  3639 00012C4C 80E701              <1> 	and	bh, 1 ; 17/04/2017
  3640 00012C4F 7513                <1> 	jnz	short scbs_11	 ; callback method, use virtual address 
  3641                              <1> 
  3642 00012C51 53                  <1> 	push	ebx ; IRQ number (in BL)
  3643 00012C52 89D3                <1> 	mov	ebx, edx
  3644                              <1> 	; ebx = virtual address
  3645                              <1> 	; [u.pgdir] = page directory's physical address
  3646 00012C54 FE05[DE880100]      <1> 	inc	 byte [no_page_swap] ; 1 
  3647                              <1> 			; Do not add this page to swap queue
  3648                              <1> 			; and remove it from swap queue if it is
  3649                              <1> 			; on the queue.
  3650 00012C5A E8722EFFFF          <1> 	call	get_physical_addr
  3651 00012C5F 5B                  <1> 	pop	ebx
  3652 00012C60 728A                <1> 	jc	short scbs_3 ; invalid address !
  3653                              <1> 	; eax = physical address of the virtual address in user's space
  3654 00012C62 89C2                <1> 	mov	edx, eax
  3655                              <1> scbs_11:
  3656                              <1> 	;shl	si, 2		; byte (index) to dword (offset)
  3657                              <1> 	; 23/11/2023
  3658 00012C64 C1E602              <1> 	shl	esi, 2
  3659 00012C67 8996[44890100]      <1> 	mov	[esi+IRQ.addr], edx
  3660                              <1> 
  3661 00012C6D FE05[92010300]      <1> 	inc	byte [u.irqc]	; increase IRQ (in use) count
  3662                              <1> 
  3663 00012C73 FEC7                <1> 	inc	bh ; 17/04/2017
  3664                              <1> 	; bh > 0 -> set to requested IRQ handler (IRQ_u_list)
  3665                              <1> scbs_12:
  3666 00012C75 88D8                <1> 	mov	al, bl ; IRQ number
  3667 00012C77 88FC                <1> 	mov	ah, bh ; 0 = reset, >0 = set
  3668 00012C79 E837F5FFFF          <1> 	call	set_hardware_int_vector
  3669                              <1> 
  3670 00012C7E 31C0                <1> 	xor	eax, eax
  3671                              <1> 	;mov 	[u.r0], eax ; 0	
  3672                              <1> 
  3673 00012C80 C3                  <1> 	retn	; return with success (cf=0, eax=0)
  3674                              <1> 
  3675                              <1> sysdma: ; DMA FUNCTIONS
  3676                              <1> 	; 08/08/2022
  3677                              <1> 	; 30/07/2022 - TRDOS 386 Kernel v2.0.5
  3678                              <1> 	; 02/09/2017
  3679                              <1> 	; 28/08/2017
  3680                              <1> 	; 20/08/2017 - TRDOS 386 (TRDOS v2.0)
  3681                              <1> 	;
  3682                              <1> 	; Inputs:
  3683                              <1> 	;	BH = 0 -> Allocate DMA buffer
  3684                              <1> 	;	   BL = 0 -> Use the system's default DMA
  3685                              <1> 	;		     (SB16) Buffer
  3686                              <1> 	;	        Buffer Size (max.) = 65536 bytes
  3687                              <1> 	;	   BL > 0 -> Allocate (a new) DMA buffer
  3688                              <1>  	;	   ECX = DMA Buffer Size in bytes (<=128KB)
  3689                              <1> 	;	   EDX = Virtual Address of DMA buffer 	
  3690                              <1> 	;		
  3691                              <1> 	;	BH = 1 -> Initialize (Start) DMA service
  3692                              <1> 	;	     BL, bit 0 to 3 = Channel Number (0 to 7)	
  3693                              <1> 	;	     BL, bit 7 = Auto Initialized Mode 
  3694                              <1> 	;			(If bit 7 is set)
  3695                              <1> 	;		 bit 6 = Record (read) mode (0= playback)
  3696                              <1> 	;	     ECX = byte count (0 = use dma buffer size)
  3697                              <1> 	;	     EDX = physical buffer address
  3698                              <1> 	;	     	   (0 = use dma buffer -start- address)		
  3699                              <1> 	;
  3700                              <1> 	;	BH = 2 -> Get Current DMA Buffer Offset
  3701                              <1> 	;	     BL = DMA channel number	
  3702                              <1> 	;		
  3703                              <1> 	;	BH = 3 -> Get Current DMA count down value
  3704                              <1> 	;	     BL = DMA channel number (0 tO 7)	
  3705                              <1> 	;
  3706                              <1> 	;	BH = 4 -> Get Current DMA channel (in progress)
  3707                              <1> 	;
  3708                              <1> 	;	BH = 5 -> Get System's Default DMA Buffer Address
  3709                              <1> 	;
  3710                              <1> 	;	BH = 6 -> Get Current DMA Buffer Address	
  3711                              <1> 	;
  3712                              <1> 	;	BH = 7 -> Stop DMA service
  3713                              <1> 	;
  3714                              <1> 	; Outputs:
  3715                              <1> 	;
  3716                              <1> 	;	For BH = 0 ; Allocate DMA buffer
  3717                              <1> 	;	    EAX = Physical address of DMA buffer
  3718                              <1> 	;	    ECX = Allocated buffer size in bytes
  3719                              <1> 	;		  - page count * 4096 -
  3720                              <1> 	;		  (may be bigger than requested)	
  3721                              <1> 	;	    If BL input > 0,
  3722                              <1> 	;	       'sysalloc:' system call will be used with
  3723                              <1>   	;	       EBX (for 'sysalloc') = EDX (for 'sysdma')
  3724                              <1> 	;	       ECX is same, byte count (buffer size)
  3725                              <1> 	;	       EDX = 1024*1024*16 ; 16 MB upper limit	 		        	 
  3726                              <1> 	;	    If BL input = 0,
  3727                              <1> 	;	       Default DMA buffer (SB16 buffer) will be
  3728                              <1> 	;	       checked and if it is free, it's address
  3729                              <1> 	;	       will be returned in EAX and it's size
  3730                              <1> 	;	       will be returned in ECX (as 65536)
  3731                              <1> 	;
  3732                              <1> 	;	    If CF = 1, error code is in EAX
  3733                              <1> 	;	       EAX = -1 ; DMA buffer allocation error! 		
  3734                              <1> 	;	       EAX = 11 ; 'Permission Denied' error !
  3735                              <1> 	;
  3736                              <1> 	;	       Note: 'sysalloc' error return method
  3737                              <1> 	;		      will be applied if BL input > 0 !		
  3738                              <1> 	;
  3739                              <1> 	; 	 For BH = 1 ; Initialize (Start) DMA
  3740                              <1> 	;	     EAX = 0 (Successful)	
  3741                              <1> 	;	     If CF = 1, error code is in EAX
  3742                              <1> 	;
  3743                              <1> 	; 	 For BH = 2 ; Get Current DMA Buffer Offset
  3744                              <1> 	;	     EAX = DMA Buffer Offset (in bytes)
  3745                              <1> 	;	     ;
  3746                              <1> 	;	      AX = DMA buffer offset
  3747                              <1> 	;	     EAX bits 16 to 23 = Page register value
  3748                              <1> 	;		   	
  3749                              <1> 	; 	 For BH = 3 ; Get Current DMA count down value
  3750                              <1> 	;	     EAX = Count down value (remain bytes)
  3751                              <1> 	;	
  3752                              <1> 	;	 For BH = 4 ; Get Current DMA channel (in progress)
  3753                              <1> 	;	     EAX = DMA channel number (0 to 7)
  3754                              <1> 	;		AH = 0 if the owner is the caller process
  3755                              <1> 	;		AH > 0 if the dma channel is in use by
  3756                              <1> 	;		       another user/process
  3757                              <1> 	;	     EAX = -1 (0FFFFFFFFh) 
  3758                              <1> 	;		    if DMA service is not in use	    		
  3759                              <1> 	;	 	    (stopped or not initialized/started)	
  3760                              <1> 	;
  3761                              <1> 	;	 For BH = 5 ; Get System's Default DMA Buff Addr
  3762                              <1> 	;	     EAX = Default DMA Buffer Address (Physical)
  3763                              <1> 	;		 = offset 'sb16_dma_buffer:'	
  3764                              <1> 	;	     ECX = Buffer size
  3765                              <1> 	;		 = 65536 
  3766                              <1> 	;
  3767                              <1> 	;	 For BH = 6 ; Get Current DMA Buffer Address
  3768                              <1> 	;	     EAX = Current DMA buffer address (Physical)
  3769                              <1> 	;	     ECX = Current DMA buffer size (setting value)	   		  	 		
  3770                              <1> 	;	     Note: These values are for current dma channel
  3771                              <1> 	;		   settings for the user/process
  3772                              <1> 	;	     ** For now (for current TRDOS 386 version)
  3773                              <1> 	;		only one user/process can use only one
  3774                              <1> 	;		dma channel & one dma buffer at same time
  3775                              <1> 	;		(no multi tasking on DMA service) !!! **
  3776                              <1> 	;	     (Once, current DMA user must stop it's own DMA
  3777                              <1> 	;	      DMA service, than another user/program 
  3778                              <1> 	;	      can use DMA service with same dma channel 
  3779                              <1> 	;	      or with another DMA channel.)	 			      		
  3780                              <1> 	;
  3781                              <1> 	;	 For BH = 7 ; Stop DMA service (for current user
  3782                              <1> 	;	     and current DMA channel)	
  3783                              <1> 	;	     EAX = 0 ; successful
  3784                              <1> 	;	     CF = 1 & EAX > 0 (= -1) -> Error		
  3785                              <1> 
  3786 00012C81 80FF07              <1> 	cmp	bh, 7
  3787 00012C84 7612                <1> 	jna	short sysdma_0
  3788                              <1> 
  3789                              <1> sysdma_err:
  3790 00012C86 31C0                <1> 	xor	eax, eax
  3791 00012C88 48                  <1> 	dec	eax ; -1
  3792                              <1> sysdma_perm_err:
  3793 00012C89 A3[1C010300]        <1> 	mov	[u.r0], eax
  3794 00012C8E A3[84010300]        <1> 	mov	[u.error], eax ; DMA service error !
  3795 00012C93 E9B7A0FFFF          <1> 	jmp	error
  3796                              <1> 
  3797                              <1> sysdma_0:
  3798 00012C98 08FF                <1> 	or	bh, bh
  3799 00012C9A 7537                <1> 	jnz	short sysdma_1 ; 30/07/2022
  3800                              <1> 	
  3801 00012C9C 20DB                <1> 	and	bl, bl
  3802 00012C9E 7416                <1> 	jz	short sysdma_01
  3803                              <1> 
  3804                              <1> 	; redirect system call to 'sysalloc'
  3805 00012CA0 89D3                <1> 	mov	ebx, edx ; virtual address of DMA buffer
  3806                              <1> 	;ecx = Buffer size in bytes
  3807                              <1> 	; DMA buffer address <= 16MB upper limit
  3808 00012CA2 BA00000001          <1> 	mov	edx, 1024*1024*16 ; 16MB limit for DMA buff
  3809                              <1> 
  3810 00012CA7 C705[B48D0100]FFFF- <1> 	mov	dword [dma_addr], 0FFFFFFFFh ; -1
  3810 00012CAF FFFF                <1>
  3811                              <1> 
  3812 00012CB1 E9A3E8FFFF          <1> 	jmp	sysalloc
  3813                              <1> 
  3814                              <1> sysdma_01:
  3815 00012CB6 B8[00000200]        <1> 	mov	eax, sb16_dma_buffer
  3816                              <1> 
  3817 00012CBB 803D[71890100]01    <1> 	cmp	byte [audio_device], 1
  3818 00012CC2 724A                <1> 	jb	short sysdma_03
  3819                              <1> 
  3820 00012CC4 3B05[90890100]      <1> 	cmp	eax, [audio_dma_buff]
  3821 00012CCA 7527                <1> 	jne	short sysdma_02
  3822                              <1> 
  3823                              <1> sysdma_0_err:
  3824 00012CCC B80B000000          <1> 	mov	eax, ERR_PERM_DENIED
  3825 00012CD1 EBB6                <1> 	jmp	short sysdma_perm_err
  3826                              <1> 
  3827                              <1> 	; 30/07/2022
  3828                              <1> sysdma_1:
  3829 00012CD3 80FF01              <1> 	cmp	bh, 1
  3830                              <1> 	;ja	sysdma_5
  3831                              <1> 	; 30/07/2022
  3832 00012CD6 7605                <1> 	jna	short sysdma_10
  3833 00012CD8 E90C010000          <1> 	jmp	sysdma_5
  3834                              <1> 
  3835                              <1> sysdma_10:
  3836 00012CDD F6C340              <1> 	test	bl, 40h	; record (read) mode -BL, bit 6-
  3837                              <1> 	;jnz	sysdma_err ; not ready yet!
  3838                              <1> 	; 30/07/2022
  3839 00012CE0 757C                <1> 	jnz	short sysdma_06 ; jmp sysdma_err
  3840                              <1> 
  3841 00012CE2 A1[B48D0100]        <1> 	mov	eax, [dma_addr] ; physical address of dma buffer
  3842 00012CE7 21C0                <1> 	and	eax, eax
  3843                              <1> 	;jz	sysdma_err
  3844                              <1> 	; 30/07/2022
  3845 00012CE9 7473                <1> 	jz	short sysdma_06 ; jmp sysdma_err
  3846                              <1> 
  3847 00012CEB 09D2                <1> 	or	edx, edx
  3848 00012CED 7574                <1> 	jnz	short sysdma_11
  3849                              <1> 
  3850 00012CEF 89C2                <1> 	mov	edx, eax
  3851 00012CF1 EB74                <1> 	jmp	short sysdma_12	
  3852                              <1> 
  3853                              <1> sysdma_02:
  3854                              <1> 	; Only one user is permitted for audio/dma functions
  3855                              <1> 
  3856 00012CF3 833D[90890100]00    <1> 	cmp	dword [audio_dma_buff], 0
  3857 00012CFA 7612                <1> 	jna	short sysdma_03
  3858                              <1> 
  3859 00012CFC 8A1D[99890100]      <1> 	mov	bl, [audio_user]
  3860 00012D02 08DB                <1> 	or	bl, bl
  3861 00012D04 7408                <1> 	jz	short sysdma_03
  3862                              <1> 
  3863 00012D06 3A1D[6D010300]      <1> 	cmp	bl, [u.uno]
  3864 00012D0C 75BE                <1> 	jne	short sysdma_0_err
  3865                              <1> 
  3866                              <1> sysdma_03: 
  3867 00012D0E 8A1D[B18D0100]      <1> 	mov	bl, [dma_user]
  3868 00012D14 20DB                <1> 	and	bl, bl
  3869 00012D16 750E                <1> 	jnz	short sysdma_04
  3870                              <1> 	
  3871 00012D18 8A1D[6D010300]      <1> 	mov	bl, [u.uno]
  3872 00012D1E 881D[B18D0100]      <1> 	mov	[dma_user], bl
  3873                              <1> 
  3874 00012D24 EB15                <1> 	jmp	short sysdma_05
  3875                              <1> 
  3876                              <1> sysdma_04:
  3877 00012D26 8B35[B48D0100]      <1> 	mov	esi, [dma_addr]
  3878 00012D2C 21F6                <1> 	and	esi, esi
  3879 00012D2E 740B                <1> 	jz	short sysdma_05
  3880                              <1> 
  3881 00012D30 46                  <1> 	inc	esi ; -1 -> 0
  3882 00012D31 7408                <1> 	jz	short sysdma_05
  3883                              <1> 
  3884 00012D33 3A1D[6D010300]      <1> 	cmp	bl, [u.uno]
  3885 00012D39 7591                <1> 	jne	short sysdma_0_err
  3886                              <1> 	
  3887                              <1> sysdma_05:
  3888                              <1> 	; edx = virtual address (user's buffer address)
  3889                              <1> 	; 
  3890 00012D3B 81F900000100        <1> 	cmp	ecx, 65536   ; byte count (buffer size)
  3891                              <1> 	;ja	sysdma_err
  3892                              <1> 	; 30/07/2022
  3893 00012D41 771B                <1> 	ja	short sysdma_06 ; jmp sysdma_err
  3894                              <1> 	;
  3895 00012D43 81C1FF0F0000        <1> 	add	ecx, PAGE_SIZE-1 ; 4095
  3896 00012D49 6681E100F0          <1> 	and	cx, ~PAGE_OFF ; not 4095
  3897                              <1> 	;cmp	ecx, 65536
  3898                              <1> 	;ja	sysdma_err
  3899 00012D4E 51                  <1> 	push	ecx	; buffer size (allocated pages * 4096) 
  3900 00012D4F 50                  <1> 	push	eax	; offset sb16_dma_buffer
  3901 00012D50 89D3                <1> 	mov	ebx, edx
  3902 00012D52 C1E90C              <1> 	shr	ecx, 12 ; byte count to page count
  3903                              <1> 	; eax = physical address of (audio) dma buffer
  3904                              <1> 	; ebx = virtual address of (audio) dma buffer (user's pgdir) 
  3905                              <1> 	; ecx = page count (>0)
  3906 00012D55 E83C31FFFF          <1> 	call	direct_memory_access
  3907 00012D5A 58                  <1> 	pop	eax
  3908 00012D5B 59                  <1> 	pop	ecx
  3909                              <1> 	;jc	sysdma_err
  3910                              <1> 	; 30/07/2022
  3911 00012D5C 7315                <1> 	jnc	short sysdma_07
  3912                              <1> sysdma_06:
  3913 00012D5E E923FFFFFF          <1> 	jmp	sysdma_err
  3914                              <1> 
  3915                              <1> sysdma_11:
  3916 00012D63 39C2                <1> 	cmp	edx, eax
  3917                              <1> 	;jb	sysdma_err
  3918                              <1> 	; 30/07/2022
  3919 00012D65 72F7                <1> 	jb	short sysdma_06 ; jmp sysdma_err
  3920                              <1> sysdma_12:
  3921 00012D67 21C9                <1> 	and	ecx, ecx
  3922 00012D69 7515                <1> 	jnz	short sysdma_13
  3923                              <1> 
  3924 00012D6B 8B0D[B88D0100]      <1> 	mov	ecx, [dma_size]
  3925 00012D71 EB15                <1> 	jmp	short sysdma_14
  3926                              <1> 
  3927                              <1> sysdma_07:
  3928 00012D73 A3[B48D0100]        <1> 	mov	[dma_addr], eax
  3929 00012D78 890D[B88D0100]      <1> 	mov	[dma_size], ecx ; dma buffer size (in bytes)
  3930                              <1> 
  3931                              <1> 	;mov	[u.r0], eax ; DMA Buffer Address (Physical)
  3932                              <1> 
  3933                              <1> 	;mov	ebp, [u.usp]  ; ebp points to user's registers
  3934                              <1> 	;mov	[ebp+24], ecx ; return to user with ecx value
  3935                              <1> 
  3936                              <1> 	;jmp	sysret
  3937                              <1> 
  3938                              <1> 	; 28/08/2017
  3939 00012D7E EB7A                <1> 	jmp	sysdma_51
  3940                              <1> 
  3941                              <1> sysdma_13:
  3942 00012D80 3B0D[B88D0100]      <1> 	cmp	ecx, [dma_size]
  3943                              <1> 	;ja	sysdma_err
  3944                              <1> 	; 30/07/2022
  3945 00012D86 77D6                <1> 	ja	short sysdma_06 ; jmp sysdma_err
  3946                              <1> sysdma_14:
  3947 00012D88 89C6                <1> 	mov	esi, eax
  3948 00012D8A 0335[B88D0100]      <1> 	add	esi, [dma_size]
  3949                              <1> 
  3950 00012D90 89D0                <1> 	mov	eax, edx
  3951 00012D92 01C8                <1> 	add	eax, ecx
  3952                              <1> 	;jc	sysdma_err ; 02/09/2017
  3953                              <1> 	; 30/07/2022
  3954 00012D94 72C8                <1> 	jc	short sysdma_06 ; jmp sysdma_err	
  3955                              <1> 		
  3956 00012D96 39F0                <1> 	cmp	eax, esi
  3957                              <1> 	;ja	sysdma_err
  3958                              <1> 	; 30/07/2022
  3959 00012D98 77C4                <1> 	ja	short sysdma_06 ; jmp sysdma_err
  3960                              <1> 
  3961 00012D9A 8B3D[90890100]      <1> 	mov	edi, [audio_dma_buff]
  3962 00012DA0 8B35[B48D0100]      <1> 	mov	esi, [dma_addr]
  3963                              <1> 
  3964 00012DA6 09FF                <1> 	or	edi, edi
  3965 00012DA8 7425                <1> 	jz	short sysdma_16
  3966                              <1> 	
  3967 00012DAA 803D[71890100]01    <1> 	cmp	byte [audio_device], 1
  3968 00012DB1 7209                <1> 	jb	short sysdma_15
  3969                              <1> 
  3970                              <1> 	; Sound Blaster 16
  3971 00012DB3 39FE                <1> 	cmp	esi, edi
  3972                              <1> 	;je	sysdma_0_err ; permmission denied !
  3973                              <1> 	; 30/07/2022
  3974 00012DB5 7505                <1> 	jne	short sysdma_15
  3975 00012DB7 E910FFFFFF          <1> 	jmp	sysdma_0_err
  3976                              <1> sysdma_15:
  3977 00012DBC C605[B38D0100]48    <1> 	mov	byte [dma_mode], 48h ; single mode playback	
  3978                              <1> 
  3979 00012DC3 F6C380              <1> 	test	bl, 80h ; DMA mode - BL, bit 7, auto init -
  3980 00012DC6 7407                <1> 	jz	short sysdma_16	
  3981                              <1> 	; Auto initialized playback (write) mode
  3982 00012DC8 8005[B38D0100]10    <1> 	add	byte [dma_mode], 10h ; = 58h
  3983                              <1> sysdma_16:
  3984 00012DCF 80E307              <1> 	and	bl, 07h
  3985 00012DD2 881D[B28D0100]      <1> 	mov	[dma_channel], bl
  3986 00012DD8 8915[BC8D0100]      <1> 	mov	[dma_start], edx
  3987 00012DDE 890D[C08D0100]      <1> 	mov	[dma_count], ecx
  3988                              <1> 	 
  3989                              <1> 	; 28/08/2017
  3990                              <1> 	;call	dma_init
  3991                              <1> 	;jmp	sysret
  3992 00012DE4 E945010000          <1> 	jmp	dma_init
  3993                              <1> 
  3994                              <1> sysdma_5:
  3995 00012DE9 80FF05              <1> 	cmp	bh, 5
  3996 00012DEC 726D                <1> 	jb	short sysdma_3
  3997 00012DEE 7759                <1> 	ja	short sysdma_6
  3998                              <1> 
  3999                              <1> 	; Get the system's default dma buffer addr and size
  4000 00012DF0 B8[00000200]        <1> 	mov	eax, sb16_dma_buffer
  4001 00012DF5 B900000100          <1> 	mov	ecx, 65536 ; Buffer size in bytes
  4002                              <1> 
  4003                              <1> sysdma_51:
  4004                              <1> 	; 0 = there is not a dma buffer (in use or available)
  4005 00012DFA A3[1C010300]        <1> 	mov	[u.r0], eax
  4006                              <1> 
  4007 00012DFF 8B2D[18010300]      <1> 	mov	ebp, [u.usp]  ; ebp points to user's registers
  4008 00012E05 894D18              <1> 	mov	[ebp+24], ecx ; return to user with ecx value
  4009                              <1> 
  4010 00012E08 E9629FFFFF          <1> 	jmp	sysret
  4011                              <1> 
  4012                              <1> sysdma_2:
  4013                              <1> 	; Get current dma buffer offset (& page)
  4014                              <1> 	; 28/08/2017
  4015 00012E0D 0FB635[B28D0100]    <1> 	movzx	esi, byte [dma_channel]
  4016 00012E14 0FB696[1A370100]    <1> 	movzx	edx, byte [dma_flip+esi]
  4017 00012E1B EE                  <1> 	out	dx, al			; flip-flop clear
  4018 00012E1C 8A96[F2360100]      <1> 	mov	dl, [dma_adr+esi]
  4019 00012E22 EC                  <1> 	in	al, dx			; get dma position
  4020 00012E23 0FB6D8              <1> 	movzx	ebx, al
  4021 00012E26 EC                  <1> 	in	al, dx			
  4022 00012E27 88C7                <1> 	mov	bh, al
  4023                              <1> 
  4024 00012E29 6683FE04            <1> 	cmp	si, 4	; channel number ?
  4025 00012E2D 7202                <1> 	jb	short sysdma_21 ; 8 bit dma channel
  4026                              <1> 
  4027 00012E2F D1E3                <1> 	shl	ebx, 1	; word offset to byte offset
  4028                              <1> 
  4029                              <1> sysdma_21:
  4030 00012E31 891D[1C010300]      <1> 	mov	[u.r0], ebx
  4031                              <1> 
  4032 00012E37 8A96[02370100]      <1> 	mov	dl, [dma_page+esi]
  4033 00012E3D EC                  <1> 	in	al, dx			; get dma page
  4034                              <1> 
  4035                              <1> 	;add	[u.ro+2], al
  4036 00012E3E 0805[1E010300]      <1> 	or	[u.r0+2], al
  4037                              <1> 
  4038 00012E44 E9269FFFFF          <1> 	jmp	sysret
  4039                              <1> 
  4040                              <1> sysdma_6:
  4041 00012E49 80FF06              <1> 	cmp	bh, 6
  4042 00012E4C 775C                <1> 	ja	short sysdma_7
  4043                              <1> 
  4044                              <1> 	; 28/08/2017
  4045                              <1> 	; Get current DMA buffer addr and size
  4046 00012E4E A1[B48D0100]        <1> 	mov	eax, [dma_addr] ; dma buffer address
  4047 00012E53 8B0D[B88D0100]      <1> 	mov	ecx, [dma_size] ; dma buffer size (in bytes)
  4048                              <1> 
  4049 00012E59 EB9F                <1> 	jmp	short sysdma_51
  4050                              <1> 
  4051                              <1> sysdma_3:
  4052 00012E5B 80FF03              <1> 	cmp	bh, 3
  4053 00012E5E 72AD                <1> 	jb	short sysdma_2
  4054 00012E60 772F                <1> 	ja	short sysdma_4
  4055                              <1> 
  4056                              <1> 	; Get current dma count down value (remain bytes)
  4057                              <1> 	; 28/08/2017
  4058 00012E62 0FB635[B28D0100]    <1> 	movzx	esi, byte [dma_channel]
  4059 00012E69 0FB696[1A370100]    <1> 	movzx	edx, byte [dma_flip+esi]
  4060 00012E70 EE                  <1> 	out	dx, al			; flip-flop clear
  4061 00012E71 8A96[FA360100]      <1> 	mov	dl, [dma_cnt+esi] ; dma count register addr
  4062 00012E77 EC                  <1> 	in	al, dx
  4063 00012E78 0FB6D8              <1> 	movzx	ebx, al	
  4064 00012E7B EC                  <1> 	in	al, dx
  4065 00012E7C 88C7                <1> 	mov     bh, al
  4066                              <1> 	
  4067 00012E7E 6683FE04            <1> 	cmp	si, 4	; channel number ?
  4068 00012E82 7202                <1> 	jb	short sysdma_31 ; 8 bit dma channel
  4069                              <1> 
  4070 00012E84 D1E3                <1> 	shl	ebx, 1	; word count to byte count
  4071                              <1> 
  4072                              <1> sysdma_31:
  4073 00012E86 891D[1C010300]      <1> 	mov	[u.r0], ebx
  4074                              <1> 
  4075 00012E8C E9DE9EFFFF          <1> 	jmp	sysret
  4076                              <1> 
  4077                              <1> sysdma_4:
  4078                              <1> 	; Get current DMA channel number
  4079                              <1> 	; 28/08/2017
  4080 00012E91 8A25[B18D0100]      <1> 	mov	ah, [dma_user]
  4081 00012E97 20E4                <1> 	and	ah, ah
  4082 00012E99 7539                <1> 	jnz	short sysdma_42
  4083                              <1> 
  4084                              <1> sysdma_41:	
  4085                              <1> 	; Not a valid dma channel (in use)
  4086 00012E9B C705[1C010300]FFFF- <1> 	mov	dword [u.r0], -1 ; 0FFFFFFFFh
  4086 00012EA3 FFFF                <1>
  4087 00012EA5 E9C59EFFFF          <1> 	jmp	sysret
  4088                              <1> 
  4089                              <1> sysdma_7:
  4090                              <1> 	; DMA service STOP
  4091 00012EAA A0[6D010300]        <1> 	mov	al, [u.uno]
  4092 00012EAF 3A05[B18D0100]      <1> 	cmp	al, [dma_user]
  4093 00012EB5 7543                <1> 	jne	short sysdma_72
  4094                              <1> 	
  4095 00012EB7 28C0                <1> 	sub	al, al ; 0
  4096                              <1> 
  4097 00012EB9 A2[B18D0100]        <1> 	mov	[dma_user], al ; clear user
  4098                              <1> 
  4099 00012EBE 8605[B38D0100]      <1> 	xchg	al, [dma_mode]
  4100 00012EC4 20C0                <1> 	and	al, al
  4101                              <1> 	;jz	short sysdma_err
  4102 00012EC6 754E                <1> 	jnz	short sysdma_73	
  4103                              <1> 
  4104                              <1> sysdma_71:
  4105 00012EC8 31C0                <1> 	xor	eax, eax
  4106 00012ECA A3[1C010300]        <1> 	mov	[u.r0], eax; 0
  4107 00012ECF E99B9EFFFF          <1> 	jmp	sysret
  4108                              <1> 
  4109                              <1> sysdma_42:
  4110 00012ED4 8B35[B48D0100]      <1> 	mov	esi, [dma_addr]
  4111 00012EDA 21F6                <1> 	and	esi, esi
  4112 00012EDC 74BD                <1> 	jz	short sysdma_41
  4113                              <1> 
  4114 00012EDE 46                  <1> 	inc	esi ; -1 -> 0
  4115 00012EDF 74BA                <1> 	jz	short sysdma_41
  4116                              <1> 
  4117 00012EE1 A0[B28D0100]        <1> 	mov	al, [dma_channel]
  4118                              <1> 
  4119 00012EE6 3A25[6D010300]      <1> 	cmp	ah, [u.uno]
  4120 00012EEC 7502                <1> 	jne	short sysdma_43
  4121                              <1> 
  4122 00012EEE 30E4                <1> 	xor	ah, ah ; DMA channel in use by current user
  4123                              <1> 
  4124                              <1> sysdma_43:
  4125 00012EF0 A3[1C010300]        <1> 	mov	[u.r0], eax ; AL = dma channel number
  4126                              <1> 			    ; AH > 0 if the the channel
  4127                              <1> 			    ; in use by another user/process
  4128 00012EF5 E9759EFFFF          <1> 	jmp	sysret
  4129                              <1> 
  4130                              <1> sysdma_72:
  4131                              <1> 	; 28/08/2017
  4132 00012EFA 803D[B18D0100]00    <1> 	cmp	byte [dma_user], 0
  4133 00012F01 76C5                <1> 	jna	short sysdma_71 ; Nothing to do !
  4134                              <1> 
  4135 00012F03 833D[B48D0100]00    <1> 	cmp	dword [dma_addr], 0
  4136                              <1> 	;ja	sysdma_0_err
  4137                              <1> 	; 30/07/2022
  4138 00012F0A 7605                <1> 	jna	short sysdma_74
  4139 00012F0C E9BBFDFFFF          <1> 	jmp	sysdma_0_err
  4140                              <1> 
  4141                              <1> sysdma_74:	
  4142 00012F11 A2[B18D0100]        <1> 	mov	[dma_user], al ; reset to current user
  4143                              <1> 
  4144                              <1> sysdma_73:
  4145                              <1> 	; 28/08/2017
  4146 00012F16 0FB635[B28D0100]    <1> 	movzx	esi, byte [dma_channel]
  4147 00012F1D 0FB696[0A370100]    <1> 	movzx	edx, byte [dma_mask+esi]
  4148 00012F24 A0[B28D0100]        <1> 	mov	al, [dma_channel]
  4149 00012F29 0C04                <1> 	or	al, 4
  4150 00012F2B EE                  <1> 	out	dx, al
  4151                              <1> 
  4152 00012F2C EB9A                <1> 	jmp	short sysdma_71
  4153                              <1> 
  4154                              <1> dma_init:
  4155                              <1> 	; 30/07/2022 (TRDOS 386 Kernel v2.0.5)
  4156                              <1> 	; 28/08/2017
  4157                              <1> 	; 20/08/2017
  4158                              <1> 	; DMA initialization
  4159                              <1> 	; 14/08/2017
  4160                              <1> 	; 03/08/2017, 06/08/2017, 08/08/2017
  4161                              <1> 	; 02/07/2017, 13/07/2017, 16/07/2017, 30/07/2017
  4162                              <1> 	; (Derived from 'DMA_INIT' procedure in SB16MOD.ASM)
  4163                              <1> 	; Modified for TRDOS 386 DMA buffer allocation & initialization !
  4164                              <1> 
  4165 00012F2E 8B1D[BC8D0100]      <1> 	mov	ebx, [dma_start]
  4166 00012F34 8B0D[C08D0100]      <1> 	mov	ecx, [dma_count]
  4167                              <1> 
  4168 00012F3A 0FB635[B28D0100]    <1> 	movzx	esi, byte [dma_channel]
  4169                              <1> 
  4170 00012F41 6683FE04            <1> 	cmp	si, 4
  4171 00012F45 7204                <1> 	jb	short gdmi1
  4172                              <1> 	; 08/08/2017
  4173                              <1> 	;shr	cx, 1 ; word count
  4174                              <1> 	; 30/07/2022
  4175 00012F47 D1E9                <1> 	shr	ecx, 1
  4176 00012F49 D1EB                <1> 	shr	ebx, 1 ; convert byte offset to word offset
  4177                              <1> gdmi1:
  4178                              <1> 	;mov	[dma_poff], bx ; 08/08/2017
  4179                              <1> 	;dec	cx			; dma size = block size - 1
  4180                              <1> 	; 30/07/2022
  4181 00012F4B 49                  <1> 	dec	ecx	
  4182                              <1> 
  4183 00012F4C 0FB696[0A370100]    <1> 	movzx	edx, byte [dma_mask+esi] ; 30/07/2017
  4184 00012F53 A0[B28D0100]        <1> 	mov	al, [dma_channel]
  4185 00012F58 0C04                <1> 	or	al, 4
  4186 00012F5A EE                  <1> 	out	dx, al			; dma channel mask
  4187                              <1> 
  4188 00012F5B 30C0                <1> 	xor	al, al ; 0 ; any value ! 08/08/2017
  4189 00012F5D 8A96[1A370100]      <1> 	mov	dl, [dma_flip+esi]
  4190 00012F63 EE                  <1> 	out	dx, al			; flip-flop clear
  4191                              <1> 	
  4192 00012F64 8A96[12370100]      <1> 	mov	dl, [dma_mod+esi]
  4193 00012F6A A0[B28D0100]        <1> 	mov	al, [dma_channel]  ; 13/07/2017
  4194 00012F6F 2403                <1> 	and	al, 3
  4195                              <1> 	; 08/08/2017
  4196 00012F71 0A05[B38D0100]      <1> 	or	al, [dma_mode] ; 58h    ; dma mode for SB16
  4197 00012F77 EE                  <1> 	out	dx, al			
  4198                              <1> 
  4199 00012F78 8A96[F2360100]      <1> 	mov	dl, [dma_adr+esi]	
  4200 00012F7E 88D8                <1> 	mov	al, bl			
  4201 00012F80 EE                  <1> 	out	dx, al			; offset low
  4202                              <1> 
  4203 00012F81 88F8                <1> 	mov	al, bh
  4204 00012F83 EE                  <1> 	out	dx, al			; offset high
  4205                              <1> 
  4206 00012F84 8A96[FA360100]      <1> 	mov	dl, [dma_cnt+esi]
  4207 00012F8A 88C8                <1> 	mov	al, cl
  4208 00012F8C EE                  <1> 	out	dx, al			; size low
  4209                              <1> 
  4210 00012F8D 88E8                <1> 	mov	al, ch
  4211 00012F8F EE                  <1> 	out	dx, al			; size high
  4212                              <1> 
  4213 00012F90 8A96[02370100]      <1> 	mov	dl, [dma_page+esi]
  4214                              <1> 	; 14/08/2017 
  4215 00012F96 6683FE04            <1> 	cmp	si, 4
  4216 00012F9A 7305                <1> 	jnb	short gdmi2
  4217 00012F9C C1EB10              <1> 	shr	ebx, 16
  4218 00012F9F EB06                <1> 	jmp	short gdmi3
  4219                              <1> gdmi2:
  4220                              <1> 	; 09/08/2017
  4221 00012FA1 C1EB0F              <1> 	shr	ebx, 15	 ; complete 16 bit shift
  4222 00012FA4 80E3FE              <1> 	and	bl, 0FEh ; clear bit 0 (not necessary)
  4223                              <1> gdmi3:	
  4224 00012FA7 88D8                <1> 	mov	al, bl
  4225 00012FA9 EE                  <1> 	out	dx, al			; page			
  4226                              <1> 	
  4227 00012FAA 8A96[0A370100]      <1> 	mov	dl, [dma_mask+esi]
  4228 00012FB0 A0[B28D0100]        <1> 	mov	al, [dma_channel]  ; 13/07/2017
  4229 00012FB5 2403                <1> 	and	al, 3
  4230 00012FB7 EE                  <1> 	out	dx, al			; dma channel unmask
  4231                              <1> 
  4232                              <1> 	;retn
  4233                              <1> 	; 28/08/2017
  4234 00012FB8 E9B29DFFFF          <1> 	jmp	sysret
  4235                              <1> 
  4236                              <1> otty:
  4237                              <1> sret:
  4238                              <1> ocvt:
  4239                              <1> ctty:
  4240                              <1> cret:
  4241                              <1> ccvt:
  4242                              <1> rtty:
  4243                              <1> wtty:
  4244                              <1> rmem:
  4245                              <1> wmem:
  4246                              <1> rfd:
  4247                              <1> rhd:
  4248                              <1> wfd:
  4249                              <1> whd:
  4250                              <1> rlpt:
  4251                              <1> wlpt:
  4252                              <1> rcvt:
  4253                              <1> xmtt:
  4254 00012FBD C3                  <1> 	retn
  3315                                  %include 'trdosk9.s' ; 04/01/2016
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.7) - INITIALIZED DATA : trdosk9.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 29/11/2023 (Previous: 30/08/2022 - Kernel v2.0.6)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 04/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; ----------------------------------------------------------------------------
     9                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
    10                              <1> ; ----------------------------------------------------------------------------
    11                              <1> ; Derived from TRDOS Operating System v1.0 (8086) source code by Erdogan Tan
    12                              <1> ; TRDOS2.ASM (09/11/2011)
    13                              <1> ; ****************************************************************************
    14                              <1> ; DRV_INIT.ASM [26/09/2009] Last Update: 07/08/2011
    15                              <1> ; MAINPROG.ASM [17/01/2004] Last Update: 09/11/2011
    16                              <1> ; CMD_INTR.ASM [29/01/2005] Last Update: 09/11/2011
    17                              <1> ; FILE.ASM [29/10/2009] Last Update: 09/10/2011
    18                              <1> 
    19                              <1> ; 12/02/2016
    20                              <1> Last_DOS_DiskNo: 
    21 00012FBE 01                  <1> 		db 1 ; A: = 0 & B: = 1
    22                              <1> 
    23                              <1> Restore_CDIR:	
    24 00012FBF FF                  <1> 		db 0FFh ; Initial value -> any number except 0
    25                              <1> 
    26                              <1> msg_CRLF_temp:  
    27 00012FC0 070D0A00            <1> 		db 07h, 0Dh, 0Ah, 0
    28                              <1> 
    29                              <1> Magic_Bytes:
    30 00012FC4 04                  <1> 		db 4
    31 00012FC5 01                  <1> 		db 1
    32                              <1> mainprog_Version:
    33 00012FC6 07                  <1> 		db 7
    34 00012FC7 5B5452444F535D204D- <1> 		db "[TRDOS] Main Program v2.0.7 (29/11/2023)"
    34 00012FD0 61696E2050726F6772- <1>
    34 00012FD9 616D2076322E302E37- <1>
    34 00012FE2 202832392F31312F32- <1>
    34 00012FEB 30323329            <1>
    35 00012FEF 0D0A                <1> 		db 0Dh, 0Ah
    36 00012FF1 286329204572646F67- <1> 		db "(c) Erdogan Tan 2005-2023"
    36 00012FFA 616E2054616E203230- <1>
    36 00013003 30352D32303233      <1>
    37 0001300A 0D0A00              <1> 		db 0Dh, 0Ah, 0
    38                              <1> 
    39                              <1> MainProgCfgFile: ; 14/04/2016
    40 0001300D 4D41494E50524F472E- <1> 		db "MAINPROG.CFG", 0
    40 00013016 43464700            <1>
    41                              <1> 
    42                              <1> TRDOSPromptLabel:
    43 0001301A 5452444F53          <1> 		db "TRDOS"
    44 0001301F 00                  <1> 		db 0
    45 00013020 00<rep 5h>          <1>                 times 5 db 0
    46 00013025 00                  <1> 		db 0
    47                              <1> 
    48                              <1> ; INTERNAL COMMANDS
    49                              <1> Command_List:
    50 00013026 44495200            <1> Cmd_Dir:	db "DIR", 0
    51 0001302A 434400              <1> Cmd_Cd:		db "CD", 0
    52 0001302D 433A00              <1> Cmd_Drive:	db "C:", 0
    53 00013030 56455200            <1> Cmd_Ver:	db "VER", 0
    54 00013034 4558495400          <1> Cmd_Exit:	db "EXIT", 0
    55 00013039 50524F4D505400      <1> Cmd_Prompt:	db "PROMPT", 0
    56 00013040 564F4C554D4500      <1> Cmd_Volume:	db "VOLUME", 0
    57 00013047 4C4F4E474E414D4500  <1> Cmd_LongName:	db "LONGNAME", 0
    58 00013050 4441544500          <1> Cmd_Date:	db "DATE", 0
    59 00013055 54494D4500          <1> Cmd_Time:	db "TIME", 0
    60 0001305A 52554E00            <1> Cmd_Run:	db "RUN", 0
    61 0001305E 53455400            <1> Cmd_Set:	db "SET", 0 
    62 00013062 434C5300            <1> Cmd_Cls:	db "CLS", 0
    63 00013066 53484F5700          <1> Cmd_Show:	db "SHOW", 0
    64 0001306B 44454C00            <1> Cmd_Del:	db "DEL", 0
    65 0001306F 41545452494200      <1> Cmd_Attrib:	db "ATTRIB", 0
    66 00013076 52454E414D4500      <1> Cmd_Rename:	db "RENAME", 0
    67 0001307D 524D44495200        <1> Cmd_Rmdir:	db "RMDIR", 0
    68 00013083 4D4B44495200        <1> Cmd_Mkdir:	db "MKDIR", 0
    69 00013089 434F505900          <1> Cmd_Copy:	db "COPY", 0
    70 0001308E 4D4F564500          <1> Cmd_Move:	db "MOVE", 0
    71 00013093 5041544800          <1> Cmd_Path:	db "PATH", 0
    72 00013098 4D454D00            <1> Cmd_Mem:	db "MEM", 0
    73 0001309C 00                  <1> 		db 0
    74 0001309D 46494E4400          <1> Cmd_Find:	db "FIND", 0
    75 000130A2 4543484F00          <1> Cmd_Echo:	db "ECHO", 0
    76 000130A7 2A00                <1> Cmd_Remark:	db "*", 0
    77 000130A9 3F00                <1> Cmd_Help:	db "?", 0
    78 000130AB 44455649434500      <1> Cmd_Device:	db "DEVICE", 0
    79 000130B2 4445564C49535400    <1> Cmd_DevList:	db "DEVLIST", 0
    80 000130BA 434844495200        <1> Cmd_Chdir:	db "CHDIR", 0
    81 000130C0 4245455000          <1> Cmd_Beep:	db "BEEP", 0
    82                              <1> 		
    83 000130C5 00                  <1> 		db 0
    84                              <1> 
    85                              <1> ; 15/02/2016 (FILE.ASM, 09/10/2011)
    86                              <1> invalid_fname_chars:
    87 000130C6 222728292A2B2C2F    <1> 		db 22h, 27h, 28h, 29h, 2Ah, 2Bh, 2Ch, 2Fh
    88 000130CE 3A3B3C3D3E3F40      <1> 		db 3Ah, 3Bh, 3Ch, 3Dh, 3Eh, 3Fh, 40h
    89 000130D5 5B5C5D5E60          <1> 		db 5Bh, 5Ch, 5Dh, 5Eh, 60h
    90                              <1> sizeInvFnChars  equ ($ - invalid_fname_chars)                
    91                              <1> ;
    92                              <1> 
    93                              <1> Msg_Enter_Date:
    94 000130DA 456E746572206E6577- <1>                 db 'Enter new date (dd-mm-yy): '
    94 000130E3 206461746520286464- <1>
    94 000130EC 2D6D6D2D7979293A20  <1>
    95 000130F5 00                  <1>                 db 0
    96                              <1> Msg_Show_Date:
    97 000130F6 43757272656E742064- <1>                 db   'Current date is '
    97 000130FF 61746520697320      <1>
    98 00013106 30                  <1> Day:            db   '0'
    99 00013107 30                  <1> 		db   '0'
   100 00013108 2F                  <1>                 db   '/'
   101 00013109 30                  <1> Month:          db   '0'
   102 0001310A 30                  <1> 		db   '0'
   103 0001310B 2F                  <1>                 db   '/'
   104 0001310C 30                  <1> Century:        db   '0'
   105 0001310D 30                  <1>                 db   '0'
   106 0001310E 30                  <1> Year:           db   '0'
   107 0001310F 30                  <1> 		db   '0'
   108 00013110 0D0A00              <1>                 db   0Dh, 0Ah, 0
   109                              <1> 
   110                              <1> Msg_Enter_Time:
   111 00013113 456E746572206E6577- <1> 		db 'Enter new time: '
   111 0001311C 2074696D653A20      <1>
   112 00013123 00                  <1> 		db 0
   113                              <1> Msg_Show_Time:
   114 00013124 43757272656E742074- <1> 		db   'Current time is '
   114 0001312D 696D6520697320      <1>
   115 00013134 30                  <1> Hour:           db   '0'
   116 00013135 30                  <1> 		db   '0'
   117 00013136 3A                  <1> 		db   ':'
   118 00013137 30                  <1> Minute:         db   '0'
   119 00013138 30                  <1> 		db   '0'
   120 00013139 3A                  <1> 		db   ':'
   121 0001313A 30                  <1> Second:         db   '0'
   122 0001313B 30                  <1> 		db   '0'
   123 0001313C 0D0A00              <1> 		db   0Dh, 0Ah, 0
   124                              <1> 
   125                              <1> ;VolSize_Unit1:   dd 0
   126                              <1> ;VolSize_Unit2:   dd 0
   127                              <1> 
   128                              <1> VolSize_KiloBytes:
   129 0001313F 206B696C6F62797465- <1> 		db " kilobytes", 0Dh, 0Ah, 0
   129 00013148 730D0A00            <1>
   130                              <1> VolSize_Bytes:
   131 0001314C 2062797465730D0A00  <1> 		db " bytes", 0Dh, 0Ah, 0
   132                              <1> Volume_in_drive:
   133 00013155 0D0A                <1> 		db 0Dh, 0Ah
   134                              <1> Vol_FS_Name:
   135 00013157 54522046533120      <1> 		db "TR FS1 "
   136 0001315E 566F6C756D6520696E- <1> 		db "Volume in drive "
   136 00013167 20647269766520      <1>
   137 0001316E 30                  <1> Vol_Drv_Name:   db 30h
   138 0001316F 3A                  <1> 		db ":"
   139 00013170 20697320            <1> 		db " is "
   140 00013174 0D0A00              <1> 		db 0Dh, 0Ah, 0
   141                              <1> Dir_Drive_Str:
   142 00013177 54522D444F53204472- <1>                 db "TR-DOS Drive "
   142 00013180 69766520            <1>
   143                              <1> Dir_Drive_Name:
   144 00013184 303A                <1>                 db "0:"
   145 00013186 0D0A                <1>                 db  0Dh, 0Ah
   146                              <1> Vol_Str_Header:
   147 00013188 566F6C756D65204E61- <1>                 db "Volume Name: "
   147 00013191 6D653A20            <1>
   148                              <1> Vol_Name:
   149 00013195 00<rep 40h>         <1> 		times 64 db 0
   150 000131D5 00                  <1> 		db 0
   151                              <1> Vol_Serial_Header:
   152 000131D6 0D0A                <1> 		db 0Dh, 0Ah
   153 000131D8 566F6C756D65205365- <1> 		db "Volume Serial No: "
   153 000131E1 7269616C204E6F3A20  <1>
   154                              <1> Vol_Serial1:
   155 000131EA 30303030            <1> 		db "0000"
   156 000131EE 2D                  <1> 		db "-"
   157                              <1> Vol_Serial2:
   158 000131EF 30303030            <1> 		db "0000"
   159 000131F3 0D0A00              <1> 		db 0Dh, 0Ah, 0
   160                              <1> 
   161                              <1> ;Vol_Tot_Sec_Str_Start:
   162                              <1> ;		dd 0
   163                              <1> Vol_Total_Sector_Header:
   164 000131F6 0D0A                <1> 		db 0Dh, 0Ah
   165 000131F8 566F6C756D65205369- <1> 		db "Volume Size : ", 0
   165 00013201 7A65203A2000        <1>
   166                              <1> ;Vol_Tot_Sec_Str: 
   167                              <1> ;		db "0000000000"
   168                              <1> ;Vol_Tot_Sec_Str_End:
   169                              <1> ;		db 0
   170                              <1> ;Vol_Free_Sectors_Str_Start:
   171                              <1> ;		dd 0
   172                              <1> Vol_Free_Sectors_Header:
   173 00013207 467265652053706163- <1> 		db "Free Space  : ", 0
   173 00013210 6520203A2000        <1>
   174                              <1> ;Vol_Free_Sectors_Str:
   175                              <1> ;		db "0000000000"
   176                              <1> ;Vol_Free_Sectors_Str_End:
   177                              <1> ;		db 0
   178                              <1> 
   179                              <1> Dir_Str_Header:
   180 00013216 4469726563746F7279- <1>                 db "Directory: "
   180 0001321F 3A20                <1>
   181 00013221 2F                  <1> Dir_Str_Root:   db "/"
   182 00013222 00<rep 40h>         <1> Dir_Str:        times 64 db 0
   183 00013262 00000000            <1>                 dd 0
   184 00013266 00                  <1>                 db 0
   185                              <1> 
   186                              <1> Msg_Bad_Command:
   187 00013267 42616420636F6D6D61- <1>                 db "Bad command or file name!"
   187 00013270 6E64206F722066696C- <1>
   187 00013279 65206E616D6521      <1>
   188 00013280 0D0A00              <1>                 db 0Dh, 0Ah, 0
   189                              <1> 
   190                              <1> msgl_drv_not_ready: 
   191 00013283 070D0A              <1> 		db 07h, 0Dh, 0Ah
   192                              <1> 
   193                              <1> ; CMD_INTR.ASM - 09/11/2011 - Messages
   194                              <1> 
   195                              <1> Msg_Not_Ready_Read_Err:
   196 00013286 4472697665206E6F74- <1>                 db "Drive not ready or read error!"
   196 0001328F 207265616479206F72- <1>
   196 00013298 207265616420657272- <1>
   196 000132A1 6F7221              <1>
   197 000132A4 0D0A00              <1>                 db 0Dh, 0Ah, 0
   198                              <1> 
   199                              <1> Msg_Not_Ready_Write_Err:
   200 000132A7 4472697665206E6F74- <1>                 db "Drive not ready or write error!"
   200 000132B0 207265616479206F72- <1>
   200 000132B9 207772697465206572- <1>
   200 000132C2 726F7221            <1>
   201 000132C6 0D0A00              <1>                 db 0Dh, 0Ah, 0
   202                              <1> 
   203                              <1> Msg_Dir_Not_Found:
   204 000132C9 4469726563746F7279- <1>                 db "Directory not found!"
   204 000132D2 206E6F7420666F756E- <1>
   204 000132DB 6421                <1>
   205 000132DD 0D0A00              <1>                 db 0Dh, 0Ah, 0
   206                              <1> 
   207                              <1> Msg_File_Not_Found:
   208 000132E0 46696C65206E6F7420- <1>                 db "File not found!"
   208 000132E9 666F756E6421        <1>
   209 000132EF 0D0A00              <1>                 db 0Dh, 0Ah, 0
   210                              <1> 
   211                              <1> Msg_File_Directory_Not_Found:
   212 000132F2 46696C65206F722064- <1>                 db "File or directory not found!"
   212 000132FB 69726563746F727920- <1>
   212 00013304 6E6F7420666F756E64- <1>
   212 0001330D 21                  <1>
   213 0001330E 0D0A00              <1>                 db 0Dh, 0Ah, 0
   214                              <1> 
   215                              <1> Msg_LongName_Not_Found:
   216 00013311 4C6F6E67206E616D65- <1>                 db "Long name not found!"
   216 0001331A 206E6F7420666F756E- <1>
   216 00013323 6421                <1>
   217 00013325 0D0A00              <1>                 db 0Dh, 0Ah, 0
   218                              <1> 
   219                              <1> beep_Insufficient_Memory: ; 20/02/2017
   220 00013328 0D0A                <1> 		db 0Dh, 0Ah
   221 0001332A 07                  <1> 		db 07h
   222                              <1> Msg_Insufficient_Memory:
   223 0001332B 496E73756666696369- <1>                 db "Insufficient memory!"
   223 00013334 656E74206D656D6F72- <1>
   223 0001333D 7921                <1>
   224 0001333F 0D0A00              <1>                 db 0Dh, 0Ah, 0
   225                              <1> 
   226                              <1> Msg_Error_Code:
   227 00013342 436F6D6D616E642066- <1>                 db 'Command failed! Error code : '
   227 0001334B 61696C656421204572- <1>
   227 00013354 726F7220636F646520- <1>
   227 0001335D 3A20                <1>
   228 0001335F 303068              <1> error_code_hex: db '00h'
   229 00013362 0A0A00              <1>                 db 0Ah, 0Ah, 0
   230                              <1> 
   231 00013365 90                  <1> align 2
   232                              <1> 
   233                              <1> ; 10/02/2016
   234                              <1> ; DIR.ASM - 09/10/2011
   235                              <1> 
   236 00013366 3C4449523E20202020- <1> Type_Dir:       db '<DIR>     ' ; 10 bytes
   236 0001336F 20                  <1>
   237                              <1> 
   238                              <1> File_Name:
   239 00013370 20<rep Ch>          <1>                 times 12 db 20h
   240 0001337C 20                  <1> 		db 20h
   241                              <1> Dir_Or_FileSize:
   242 0001337D 20<rep Ah>          <1>                 times 10 db 20h
   243 00013387 20                  <1> 		db 20h
   244                              <1> File_Attribute:
   245 00013388 20202020            <1> 		dd 20202020h
   246 0001338C 20                  <1> 		db 20h
   247                              <1> File_Day:
   248 0001338D 3030                <1>                 db '0','0'
   249 0001338F 2F                  <1> 		db '/'
   250                              <1> File_Month:
   251 00013390 3030                <1>                 db '0','0'
   252 00013392 2F                  <1> 		db '/'
   253                              <1> File_Year:
   254 00013393 30303030            <1>                 db '0','0','0','0'
   255 00013397 20                  <1> 		db 20h
   256                              <1> File_Hour:
   257 00013398 3030                <1>                 db '0','0'
   258 0001339A 3A                  <1> 		db ':'
   259                              <1> File_Minute:
   260 0001339B 3030                <1>                 db '0','0'
   261 0001339D 00                  <1> 		db 0
   262                              <1> 
   263                              <1> Decimal_File_Count_Header:
   264 0001339E 0D0A                <1> 		db 0Dh, 0Ah
   265                              <1> Decimal_File_Count:
   266 000133A0 00<rep 6h>          <1> 		times 6 db 0
   267                              <1> 
   268 000133A6 2066696C6528732920- <1> str_files:	db " file(s) & "
   268 000133AF 2620                <1>
   269                              <1> Decimal_Dir_Count: 
   270 000133B1 00<rep 6h>          <1> 		times 6 db 0
   271                              <1> str_dirs:       
   272 000133B7 206469726563746F72- <1> 		db " directory(s) "
   272 000133C0 7928732920          <1>
   273 000133C5 0D0A00              <1> 		db 0Dh, 0Ah, 0
   274                              <1> 
   275 000133C8 206279746528732920- <1> str_bytes:	db " byte(s) in file(s)"
   275 000133D1 696E2066696C652873- <1>
   275 000133DA 29                  <1>
   276 000133DB 0D0A00              <1> 		db 0Dh, 0Ah, 0
   277                              <1> 
   278                              <1> ; CMD_INTR.ASM - 09/11/2011
   279                              <1> ; 07/10/2010
   280                              <1> Msg_invalid_name_chars:
   281 000133DE 496E76616C69642066- <1>                 db "Invalid file or directory name characters!"
   281 000133E7 696C65206F72206469- <1>
   281 000133F0 726563746F7279206E- <1>
   281 000133F9 616D65206368617261- <1>
   281 00013402 637465727321        <1>
   282 00013408 0D0A00              <1>         	db 0Dh, 0Ah, 0
   283                              <1> ; 21/02/2016
   284 0001340B 46696C65206F722064- <1> Msg_Name_Exists: db "File or directory name exists!"
   284 00013414 69726563746F727920- <1>
   284 0001341D 6E616D652065786973- <1>
   284 00013426 747321              <1>
   285 00013429 0D0A00              <1>                 db 0Dh, 0Ah, 0
   286                              <1> Msg_DoYouWantMkdir:
   287 0001342C 446F20796F75207761- <1>                 db "Do you want to make directory ", 0
   287 00013435 6E7420746F206D616B- <1>
   287 0001343E 65206469726563746F- <1>
   287 00013447 72792000            <1>
   288 0001344B 2028592F4E29203F20- <1> Msg_YesNo:      db " (Y/N) ? ", 0  
   288 00013454 00                  <1>
   289 00013455 000D0A00            <1> Y_N_nextline:	db 0, 0Dh, 0Ah, 0 
   290 00013459 4F4B2E0D0A00        <1> Msg_OK:		db "OK.", 0Dh, 0Ah, 0
   291                              <1> 
   292                              <1> ; 27/02/2016
   293                              <1> Msg_DoYouWantRmDir:
   294 0001345F 446F20796F75207761- <1>                 db "Do you want to delete directory ", 0
   294 00013468 6E7420746F2064656C- <1>
   294 00013471 657465206469726563- <1>
   294 0001347A 746F72792000        <1>
   295                              <1> Msg_Dir_Not_Empty:
   296 00013480 4469726563746F7279- <1>                 db "Directory not empty!"
   296 00013489 206E6F7420656D7074- <1>
   296 00013492 7921                <1>
   297 00013494 0D0A00              <1>                 db 0Dh, 0Ah, 0
   298                              <1> 
   299                              <1> Msg_DoYouWantDelete:
   300 00013497 446F20796F75207761- <1>                 db "Do you want to delete file ",0
   300 000134A0 6E7420746F2064656C- <1>
   300 000134A9 6574652066696C6520- <1>
   300 000134B2 00                  <1>
   301                              <1> 
   302 000134B3 44656C657465642E2E- <1> Msg_Deleted:    db "Deleted...", 0Dh, 0Ah, 0
   302 000134BC 2E0D0A00            <1>
   303                              <1> 
   304                              <1> Msg_Permission_Denied:
   305 000134C0 07                  <1>                 db 7
   306 000134C1 5065726D697373696F- <1>                 db "Permission denied!", 0Dh, 0Ah, 0
   306 000134CA 6E2064656E69656421- <1>
   306 000134D3 0D0A00              <1>
   307                              <1> 
   308                              <1> ; 04/03/2016
   309 000134D6 4E657720            <1> Msg_New:        db "New "
   310 000134DA 00                  <1>                 db 0
   311                              <1> Str_Attributes:
   312 000134DB 417474726962757465- <1>                 db "Attributes : "
   312 000134E4 73203A20            <1>
   313 000134E8 4E4F524D414C        <1> Attr_Chars:     db "NORMAL"
   314 000134EE 00                  <1>                 db 0
   315                              <1> 
   316                              <1> ; 06/03/2016
   317                              <1> ; CMD_INTR.ASM - 16/11/2010 
   318                              <1> Msg_DoYouWantRename:
   319 000134EF 446F20796F75207761- <1>                 db "Do you want to rename ", 0
   319 000134F8 6E7420746F2072656E- <1>
   319 00013501 616D652000          <1>
   320 00013506 66696C652000        <1> Rename_File:    db "file ", 0
   321 0001350C 6469726563746F7279- <1> Rename_Directory: db "directory ", 0
   321 00013515 2000                <1>
   322 00013517 00<rep Dh>          <1> Rename_OldName: times 13 db 0
   323 00013524 20617320            <1> Msg_File_rename_as: db " as "
   324 00013528 00<rep Dh>          <1> Rename_NewName: times 13 db 0
   325                              <1> 
   326                              <1> ; 08/03/2016
   327                              <1> ; CMD_INTR.ASM - 01/08/2010 - 23/04/2011
   328                              <1> msg_not_same_drv:
   329 00013535 4E6F742073616D6520- <1>                 db "Not same drive!" 
   329 0001353E 647269766521        <1>
   330 00013544 0D0A00              <1>                 db 0Dh, 0Ah, 0 
   331                              <1> 
   332                              <1> Msg_DoYouWantMoveFile:
   333 00013547 446F20796F75207761- <1>                 db "Do you want to move file", 0
   333 00013550 6E7420746F206D6F76- <1>
   333 00013559 652066696C6500      <1>
   334                              <1> 
   335                              <1> msg_insufficient_disk_space:
   336 00013560 496E73756666696369- <1>                 db "Insufficient disk space!" 
   336 00013569 656E74206469736B20- <1>
   336 00013572 737061636521        <1>
   337 00013578 0D0A00              <1>                 db 0Dh, 0Ah, 0
   338                              <1> 
   339                              <1> ; 01/08/2010
   340                              <1> msg_source_file: 
   341 0001357B 0D0A536F7572636520- <1> 		db 0Dh, 0Ah, "Source file name      :   "
   341 00013584 66696C65206E616D65- <1>
   341 0001358D 2020202020203A2020- <1>
   341 00013596 20                  <1>
   342                              <1> msg_source_file_drv: 
   343 00013597 203A00              <1> 		db " :", 0
   344                              <1> msg_destination_file: 
   345 0001359A 0D0A44657374696E61- <1> 		db 0Dh, 0Ah, "Destination file name :   "
   345 000135A3 74696F6E2066696C65- <1>
   345 000135AC 206E616D65203A2020- <1>
   345 000135B5 20                  <1>
   346                              <1> msg_destination_file_drv: 
   347 000135B6 203A00              <1> 		db " :", 0
   348                              <1> msg_copy_nextline: 
   349 000135B9 0D0A00              <1> 		db 0Dh, 0Ah, 0
   350                              <1> 
   351                              <1> ; 15/03/2016
   352                              <1> ; CMD_INTR.ASM
   353                              <1> 
   354                              <1> Msg_DoYouWantOverWriteFile:
   355 000135BC 446F20796F75207761- <1>                 db "Do you want to overwrite file ",0
   355 000135C5 6E7420746F206F7665- <1>
   355 000135CE 727772697465206669- <1>
   355 000135D7 6C652000            <1>
   356                              <1>   
   357                              <1> Msg_DoYouWantCopyFile:
   358 000135DB 446F20796F75207761- <1>                 db "Do you want to copy file",0
   358 000135E4 6E7420746F20636F70- <1>
   358 000135ED 792066696C6500      <1>
   359                              <1> 
   360                              <1> Msg_read_file_error_before_EOF:
   361 000135F4 46696C652072656164- <1> 		db "File reading error! (before EOF)"
   361 000135FD 696E67206572726F72- <1>
   361 00013606 2120286265666F7265- <1>
   361 0001360F 20454F4629          <1>
   362 00013614 0A0A00              <1> 		db 0Ah, 0Ah, 0
   363                              <1> 
   364                              <1> ; 18/03/2016
   365                              <1> ; TRDOS 386 (v2.0) mainprog copy procedure
   366                              <1> msg_reading:
   367 00013617 52656164696E672E2E- <1> 		db "Reading... ", 0
   367 00013620 2E2000              <1>
   368                              <1> msg_writing:
   369 00013623 57726974696E672E2E- <1> 		db "Writing... ", 0
   369 0001362C 2E2000              <1>
   370                              <1> percentagestr:
   371 0001362F 2020202500          <1> 		db "   %", 0  ; "  0%" .. "100%"
   372                              <1> ; 11/04/2016
   373                              <1> Msg_No_Set_Space:
   374 00013634 496E73756666696369- <1>                 db "Insufficient environment space!"
   374 0001363D 656E7420656E766972- <1>
   374 00013646 6F6E6D656E74207370- <1>
   374 0001364F 61636521            <1>
   375 00013653 0D0A00              <1>                 db 0Dh, 0Ah, 0
   376                              <1> ; 18/04/2016
   377                              <1> isc_msg:	
   378 00013656 0D0A                <1> 		db 0Dh, 0Ah
   379 00013658 494E56414C49442053- <1> 		db "INVALID SYSTEM CALL", 0
   379 00013661 595354454D2043414C- <1>
   379 0001366A 4C00                <1>
   380                              <1> usi_msg:
   381 0001366C 0D0A                <1> 		db 0Dh, 0Ah
   382 0001366E 554E444546494E4544- <1> 		db "UNDEFINED SOFTWARE INTERRUPT", 0
   382 00013677 20534F465457415245- <1>
   382 00013680 20494E544552525550- <1>
   382 00013689 5400                <1>
   383                              <1> ifc_msg:
   384 0001368B 0D0A                <1> 		db 0Dh, 0Ah
   385 0001368D 494E56414C49442046- <1> 		db "INVALID FUNCTION CALL"
   385 00013696 554E4354494F4E2043- <1>
   385 0001369F 414C4C              <1>
   386                              <1> inv_msg_for_trdos_v2:
   387 000136A2 20                  <1> 		db 20h
   388 000136A3 666F72205452444F53- <1> 		db "for TRDOS v2!"
   388 000136AC 20763221            <1>
   389 000136B0 07                  <1> 		db 07h
   390 000136B1 0D0A                <1> 		db 0Dh, 0Ah
   391 000136B3 0D0A                <1> 		db 0Dh, 0Ah
   392 000136B5 494E5420            <1> 		db "INT "
   393 000136B9 303068              <1> int_num_str:	db "00h"
   394 000136BC 0D0A                <1> 		db 0Dh, 0Ah
   395 000136BE 454158203A20        <1> 		db "EAX : "
   396 000136C4 303030303030303068- <1> eax_str:	db "00000000h", 0Dh, 0Ah
   396 000136CD 0D0A                <1>
   397 000136CF 454950203A20        <1> 		db "EIP : "
   398 000136D5 303030303030303068- <1> eip_str:	db "00000000h", 0Dh, 0Ah, 0
   398 000136DE 0D0A00              <1>
   399                              <1> 
   400                              <1> ; 17/04/2021
   401                              <1> ; ('KDEV' device parameters are disabled as temporary)
   402                              <1> 
   403                              <1> ; 07/10/2016
   404                              <1> ; Device names & parameters (for kernel devices)
   405                              <1> 
   406 000136E1 90                  <1> align 2
   407                              <1> ;KDEV_NAME:
   408                              <1> ;		db 'TTY',0,0,0,0,0 ; 1
   409                              <1> ;		db 'MEM',0,0,0,0,0 ; 2
   410                              <1> ;		db 'FD0',0,0,0,0,0 ; 3
   411                              <1> ;		db 'FD1',0,0,0,0,0 ; 4
   412                              <1> ;		db 'HD0',0,0,0,0,0 ; 5
   413                              <1> ;		db 'HD1',0,0,0,0,0 ; 6
   414                              <1> ;		db 'HD2',0,0,0,0,0 ; 7
   415                              <1> ;		db 'HD3',0,0,0,0,0 ; 8
   416                              <1> ;		db 'LPT',0,0,0,0,0 ; 9
   417                              <1> ;		db 'TTY0',0,0,0,0 ; 10
   418                              <1> ;		db 'TTY1',0,0,0,0 ; 11
   419                              <1> ;		db 'TTY2',0,0,0,0 ; 12
   420                              <1> ;		db 'TTY3',0,0,0,0 ; 13
   421                              <1> ;		db 'TTY4',0,0,0,0 ; 14
   422                              <1> ;		db 'TTY5',0,0,0,0 ; 15
   423                              <1> ;		db 'TTY6',0,0,0,0 ; 16
   424                              <1> ;		db 'TTY7',0,0,0,0 ; 17
   425                              <1> ;		db 'TTY8',0,0,0,0 ; 18
   426                              <1> ;		db 'TTY9',0,0,0,0 ; 19
   427                              <1> ;		db 'COM1',0,0,0,0 ; 18
   428                              <1> ;		db 'COM2',0,0,0,0 ; 19
   429                              <1> ;		;db 'CONSOLE',0	  ; 1
   430                              <1> ;		;db 'PRINTER',0   ; 9
   431                              <1> ;		;db 'CDROM'	  ; 20
   432                              <1> ;		;db 'CDROM0'	  ; 20
   433                              <1> ;		;db 'CDROM1'	  ; 21		
   434                              <1> ;		;db 'DVD'	  ; 22
   435                              <1> ;		;db 'DVD0'	  ; 22
   436                              <1> ;		;db 'DVD1'	  ; 23		
   437                              <1> ;		;db 'USB'	  ; 24
   438                              <1> ;		;db 'USB0'	  ; 24
   439                              <1> ;		;db 'USB1'	  ; 25
   440                              <1> ;		;db 'USB2'	  ; 26
   441                              <1> ;		;db 'USB3'        ; 27
   442                              <1> ;		;db 'KEYBOARD'	  ; 1	
   443                              <1> ;		;db 'MOUSE'	  ; 28
   444                              <1> ;		;db 'SOUND'	  ; 29
   445                              <1> ;		;db 'VGA',0,0,0,0 ; 30
   446                              <1> ;		;db 'CGA',0,0,0,0 ; 31
   447                              <1> ;		;db 'AUDIO',0,0,0 ; 29
   448                              <1> ;		;db 'VIDEO',0,0,0 ; 32
   449                              <1> ;		;db 'MUSIC',0,0,0 ; 33
   450                              <1> ;		;db 'ETHERNET'	  ; 34 		
   451                              <1> ;		;db 'SD0',0,0,0,0,0 ; 35
   452                              <1> ;		;db 'SD1',0,0,0,0,0 ; 36
   453                              <1> ;		;db 'SD2',0,0,0,0,0 ; 37
   454                              <1> ;		;db 'SD3',0,0,0,0,0 ; 38
   455                              <1> ;		;db 'SATA0'	  ; 35
   456                              <1> ;		;db 'SATA1'	  ; 36
   457                              <1> ;		;db 'SATA2'        ; 37
   458                              <1> ;		;db 'SATA3'        ; 38
   459                              <1> ;		;db 'PATA0',0,0,0  ; 5
   460                              <1> ;		;db 'PATA1',0,0,0  ; 6
   461                              <1> ;		;db 'PATA2',0,0,0  ; 7
   462                              <1> ;		;db 'PATA3',0,0,0  ; 8
   463                              <1> ;		;db 'WIRELESS'	  ; 39
   464                              <1> ;		;db 'HDMI',0,0,0,0 ; 40
   465                              <1> ;		db 'NULL',0,0,0,0 ; 0
   466                              <1> 
   467                              <1> ;NumOfKernelDevNames equ ($-KDEV_NAME) / 8 ; 20 (07/10/2016)
   468                              <1> 
   469                              <1> ;KDEV_NUMBER:
   470                              <1> ;		db 1,2,3,4,5,6,7,8,9
   471                              <1> ;		db 10,11,12,13,14,15,16,17,18,19
   472                              <1> ;		db 18,19,0
   473                              <1> 
   474                              <1> ;NumOfKernelDevices equ $ - KDEV_NUMBER
   475                              <1> 
   476                              <1> ;KDEV_OADDR:
   477                              <1> ;		dd otty ;tty  ; 1
   478                              <1> ;		dd sret ;mem  ; 2
   479                              <1> ; 		dd sret ;fd0  ; 3
   480                              <1> ; 		dd sret ;fd1  ; 4
   481                              <1> ;		dd sret ;hd0  ; 5
   482                              <1> ;		dd sret ;hd1  ; 6
   483                              <1> ;		dd sret ;hd2  ; 7
   484                              <1> ;		dd sret ;hd3  ; 8
   485                              <1> ;		dd sret ;lpt  ; 9
   486                              <1> ;		dd ocvt ;tty0 ; 10
   487                              <1> ;		dd ocvt ;tty1 ; 11
   488                              <1> ;		dd ocvt ;tty2 ; 12
   489                              <1> ;		dd ocvt ;tty3 ; 13
   490                              <1> ;		dd ocvt ;tty4 ; 14
   491                              <1> ;		dd ocvt ;tty5 ; 15
   492                              <1> ;		dd ocvt ;tty6 ; 16
   493                              <1> ;		dd ocvt ;tty7 ; 17
   494                              <1> ;		dd ocvt ;tty8 ; 18
   495                              <1> ;		dd ocvt ;tty9 ; 19
   496                              <1> ;		;dd ocvt ;com1 ; 18
   497                              <1> ;		;dd ocvt ;com2 ; 19
   498                              <1> ;		dd sret ;null ; 20  
   499                              <1> ;KDEV_CADDR:
   500                              <1> ;		dd ctty ;tty  ; 1
   501                              <1> ;		dd cret ;mem  ; 2
   502                              <1> ; 		dd cret ;fd0  ; 3
   503                              <1> ; 		dd cret ;fd1  ; 4
   504                              <1> ;		dd cret ;hd0  ; 5
   505                              <1> ;		dd cret ;hd1  ; 6
   506                              <1> ; 		dd cret ;hd2  ; 7
   507                              <1> ;		dd cret ;hd3  ; 8
   508                              <1> ; 		dd cret ;lpt  ; 9
   509                              <1> ;		dd ocvt ;tty0 ; 10
   510                              <1> ;		dd ccvt ;tty1 ; 11
   511                              <1> ;		dd ccvt ;tty2 ; 12
   512                              <1> ; 		dd ccvt ;tty3 ; 13
   513                              <1> ; 		dd ccvt ;tty4 ; 14
   514                              <1> ; 		dd ccvt ;tty5 ; 15
   515                              <1> ; 		dd ccvt ;tty6 ; 16
   516                              <1> ; 		dd ccvt ;tty7 ; 17
   517                              <1> ; 		dd ccvt ;tty8 ; 18
   518                              <1> ; 		dd ccvt ;tty9 ; 19
   519                              <1> ; 		;dd ccvt ;com1 ; 18
   520                              <1> ; 		;dd ccvt ;com2 ; 19
   521                              <1> ;		dd cret ;null ; 20
   522                              <1> ;
   523                              <1> ;KDEV_RADDR:
   524                              <1> ;		dd rtty ;tty  ; 1
   525                              <1> ;		dd rmem ;mem  ; 2
   526                              <1> ;		dd rfd  ;fd0  ; 3
   527                              <1> ; 		dd rfd  ;fd1  ; 4
   528                              <1> ; 		dd rhd  ;hd0  ; 5
   529                              <1> ; 		dd rhd  ;hd1  ; 6
   530                              <1> ; 		dd rhd  ;hd2  ; 7
   531                              <1> ; 		dd rhd  ;hd3  ; 8
   532                              <1> ; 		dd rlpt ;lpt  ; 9
   533                              <1> ; 		dd rcvt ;tty0 ; 10
   534                              <1> ;		dd rcvt ;tty1 ; 11
   535                              <1> ; 		dd rcvt ;tty2 ; 12
   536                              <1> ; 		dd rcvt ;tty3 ; 13
   537                              <1> ; 		dd rcvt ;tty4 ; 14
   538                              <1> ; 		dd rcvt ;tty5 ; 15
   539                              <1> ; 		dd rcvt ;tty6 ; 16
   540                              <1> ; 		dd rcvt ;tty7 ; 17
   541                              <1> ; 		dd rcvt ;tty8 ; 18
   542                              <1> ; 		dd rcvt ;tty9 ; 19
   543                              <1> ; 		;dd rcvt ;com1 ; 18
   544                              <1> ; 		;dd rcvt ;com2 ; 19
   545                              <1> ;		dd rnull ;null ; 20  
   546                              <1> ;KDEV_WADDR:
   547                              <1> ;		dd wtty ;tty  ; 1
   548                              <1> ;		dd wmem ;mem  ; 2
   549                              <1> ;		dd wfd  ;fd0  ; 3
   550                              <1> ; 		dd wfd  ;fd1  ; 4
   551                              <1> ; 		dd whd  ;hd0  ; 5
   552                              <1> ; 		dd whd  ;hd1  ; 6
   553                              <1> ; 		dd whd  ;hd2  ; 7
   554                              <1> ; 		dd whd  ;hd3  ; 8
   555                              <1> ; 		dd wlpt ;lpt  ; 9
   556                              <1> ; 		dd xmtt ;tty0 ; 10
   557                              <1> ;		dd xmtt ;tty1 ; 11
   558                              <1> ; 		dd xmtt ;tty2 ; 12
   559                              <1> ; 		dd xmtt ;tty3 ; 13
   560                              <1> ; 		dd xmtt ;tty4 ; 14
   561                              <1> ; 		dd xmtt ;tty5 ; 15
   562                              <1> ; 		dd xmtt ;tty6 ; 16
   563                              <1> ; 		dd xmtt ;tty7 ; 17
   564                              <1> ; 		dd xmtt ;tty8 ; 18
   565                              <1> ; 		dd xmtt ;tty9 ; 19
   566                              <1> ; 		;dd xmtt ;com1 ; 18
   567                              <1> ; 		;dd xmtt ;com2 ; 19
   568                              <1> ;		dd wnull ;null ; 20  
   569                              <1> 
   570                              <1> ; DEV_ACCESS bits:
   571                              <1> 	; bit 0 = accessable by normal users
   572                              <1> 	; bit 1 = read access permission
   573                              <1> 	; bit 2 = write access permission
   574                              <1> 	; bit 3 = IOCTL permission to users
   575                              <1> 	; bit 4 = block device if it is set
   576                              <1> 	; bit 5 = 16 bit or 1024 byte data
   577                              <1> 	; bit 6 = 32 bit or 2048 byte data
   578                              <1> 	; bit 7 = installable device driver	
   579                              <1> 
   580                              <1> ;KDEV_ACCESS: ; 08/10/2016
   581                              <1> ;		db  00000111b	; tty, 1
   582                              <1> ;		db  00000111b	; mem, 2	
   583                              <1> ;		db  10001111b	; fd0, 3	
   584                              <1> ;		db  10001111b	; fd1, 4
   585                              <1> ;		db  10001111b	; hd0, 5
   586                              <1> ;		db  10001111b	; hd1, 6
   587                              <1> ;		db  10001111b	; hd2, 7
   588                              <1> ;		db  10001111b	; hd3, 8
   589                              <1> ;		db  00000111b   ; lpt, 9
   590                              <1> ;		db  00000111b	; tty0, 10
   591                              <1> ;		db  00000111b	; tty1, 11
   592                              <1> ;		db  00000111b	; tty2, 12
   593                              <1> ;		db  00000111b	; tty3, 13
   594                              <1> ;		db  00000111b	; tty4, 14
   595                              <1> ;		db  00000111b	; tty5, 15
   596                              <1> ;		db  00000111b	; tty6, 16
   597                              <1> ;		db  00000111b	; tty7, 17
   598                              <1> ;		db  00000111b	; tty8, 18
   599                              <1> ;		db  00000111b	; tty9, 19
   600                              <1> ;		;db 00000111b	; com1, 18
   601                              <1> ;		;db 00000111b	; com2, 19
   602                              <1> ;		db  00000000b   ; null, 0
   603                              <1> 
   604                              <1> ; 07/10/2016
   605                              <1> ;NumOfInstallableDevices equ 8
   606                              <1> ;NUMIDEV	equ NumOfInstallableDevices ; 8
   607                              <1> ;NUMOFDEVICES	equ NumOfKernelDevices + NumOfInstallableDevices
   608                              <1> 
   609                              <1> ; 26/02/2017
   610                              <1> ; IRQ Callback (& Signal Response Byte) service availibity
   611                              <1> ; 'syscalbac'
   612                              <1> ; ***************************************************
   613                              <1> ; IRQ 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
   614                              <1> ; --- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
   615                              <1> ; --- 00 00 00 01 02 03 00 04 00 05 06 07 08 09 00 00
   616                              <1> ; ***************************************************
   617                              <1> IRQenum:
   618 000136E2 000000010203000400- <1> 	db  0,0,0,1,2,3,0,4,0,5,6,7,8,9,0,0
   618 000136EB 05060708090000      <1>
   619                              <1> 
   620                              <1> ; 28/08/2017
   621                              <1> ; 20/08/2017
   622                              <1> ; DMA Registers (for 'sysdma')
   623                              <1> ; 02/07/2017 (sb16mod.s)
   624 000136F2 00020406C0C4C8CC    <1> dma_adr:	db 0,2,4,6,0C0h,0C4h,0C8h,0CCh
   625 000136FA 01030507C2C6CACE    <1> dma_cnt:	db 1,3,5,7,0C2h,0C6h,0CAh,0CEh
   626 00013702 878381828F8B898A    <1> dma_page:	db 87h,83h,81h,82h,8Fh,8Bh,89h,8Ah ; 03/08/2017
   627 0001370A 0A0A0A0AD4D4D4D4    <1> dma_mask:	db 0Ah,0Ah,0Ah,0Ah,0D4h,0D4h,0D4h,0D4h
   628 00013712 0B0B0B0BD6D6D6D6    <1> dma_mod:	db 0Bh,0Bh,0Bh,0Bh,0D6h,0D6h,0D6h,0D6h
   629 0001371A 0C0C0C0CD8D8D8D8    <1> dma_flip:	db 0Ch,0Ch,0Ch,0Ch,0D8h,0D8h,0D8h,0D8h	
  3316                                  
  3317                                  ; 27/08/2014
  3318                                  scr_row:
  3319 00013722 E0810B00                	dd 0B8000h + 0A0h + 0A0h + 0A0h ; Row 3
  3320                                  scr_col:
  3321 00013726 00000000                	dd 0
  3322                                  
  3323 0001372A 90<rep 2h>              Align 4
  3324                                  	; 15/04/2016
  3325                                  	; TRDOS 386 (TRDOS v2.0)
  3326                                  
  3327                                  	; 21/08/2014
  3328                                  ilist:
  3329                                  	;times 	32 dd cpu_except ; INT 0 to INT 1Fh
  3330                                  	;
  3331                                  	; Exception list
  3332                                  	; 25/08/2014	
  3333 0001372C [F30B0000]              	dd	exc0	; 0h,  Divide-by-zero Error
  3334 00013730 [FA0B0000]              	dd	exc1	
  3335 00013734 [010C0000]              	dd 	exc2	
  3336 00013738 [080C0000]              	dd	exc3	
  3337 0001373C [0C0C0000]              	dd	exc4	
  3338 00013740 [100C0000]              	dd	exc5	
  3339 00013744 [140C0000]              	dd 	exc6	; 06h,  Invalid Opcode
  3340 00013748 [180C0000]              	dd	exc7	
  3341 0001374C [1C0C0000]              	dd	exc8	
  3342 00013750 [200C0000]              	dd	exc9	
  3343 00013754 [240C0000]              	dd 	exc10	
  3344 00013758 [280C0000]              	dd	exc11
  3345 0001375C [2C0C0000]              	dd	exc12
  3346 00013760 [300C0000]              	dd	exc13	; 0Dh, General Protection Fault
  3347 00013764 [340C0000]              	dd 	exc14	; 0Eh, Page Fault
  3348 00013768 [380C0000]              	dd	exc15
  3349 0001376C [3C0C0000]              	dd	exc16
  3350 00013770 [400C0000]              	dd	exc17
  3351 00013774 [440C0000]              	dd 	exc18
  3352 00013778 [480C0000]              	dd	exc19
  3353 0001377C [4C0C0000]              	dd 	exc20
  3354 00013780 [500C0000]              	dd	exc21
  3355 00013784 [540C0000]              	dd	exc22
  3356 00013788 [580C0000]              	dd	exc23
  3357 0001378C [5C0C0000]              	dd 	exc24
  3358 00013790 [600C0000]              	dd	exc25
  3359 00013794 [640C0000]              	dd	exc26
  3360 00013798 [680C0000]              	dd	exc27
  3361 0001379C [6C0C0000]              	dd 	exc28
  3362 000137A0 [700C0000]              	dd	exc29
  3363 000137A4 [740C0000]              	dd 	exc30
  3364 000137A8 [780C0000]              	dd	exc31
  3365                                  IRQ_list: ; 28/02/2017 ('syscalbac')
  3366                                  	; Interrupt list
  3367 000137AC [66090000]              	dd	timer_int	; INT 20h
  3368                                  		;dd	irq0	
  3369 000137B0 [C9100000]              	dd	kb_int		; 24/01/2016
  3370                                  		;dd	irq1
  3371 000137B4 [490B0000]              	dd	irq2
  3372                                  		; COM2 int
  3373 000137B8 [4D0B0000]              	dd	irq3
  3374                                  		; COM1 int
  3375 000137BC [580B0000]              	dd	irq4
  3376 000137C0 [630B0000]              	dd	irq5
  3377                                  ;DISKETTE_INT: ;06/02/2015
  3378 000137C4 [2A4E0000]              	dd	fdc_int		; 16/02/2015, IRQ 6 handler	
  3379                                  		;dd	irq6
  3380                                  ; Default IRQ 7 handler against spurious IRQs (from master PIC)
  3381                                  ; 25/02/2015 (source: http://wiki.osdev.org/8259_PIC)
  3382 000137C8 [D60E0000]              	dd	default_irq7	; 25/02/2015
  3383                                  		;dd	irq7
  3384                                  ; Real Time Clock Interrupt
  3385 000137CC [D10A0000]              	dd	rtc_int		; 23/02/2015, IRQ 8 handler
  3386                                  		;dd	irq8	; INT 28h
  3387 000137D0 [730B0000]              	dd	irq9
  3388 000137D4 [770B0000]              	dd	irq10
  3389 000137D8 [7B0B0000]              	dd	irq11
  3390 000137DC [7F0B0000]              	dd	irq12
  3391 000137E0 [830B0000]              	dd	irq13
  3392                                  ;HDISK_INT1:  ;06/02/2015 	
  3393 000137E4 [AC560000]              	dd	hdc1_int 	; 21/02/2015, IRQ 14 handler		
  3394                                  		;dd	irq14
  3395                                  ;HDISK_INT2:  ;06/02/2015
  3396 000137E8 [CF560000]              	dd	hdc2_int 	; 21/02/2015, IRQ 15 handler		
  3397                                  		;dd	irq15	; INT 2Fh
  3398                                  		; 14/08/2015
  3399                                  	;dd	sysent		; INT 30h (system calls)
  3400                                  
  3401                                  	; 15/04/2016
  3402                                  	; TRDOS 386(TRDOS v2.0) Software Interrupts
  3403                                  
  3404 000137EC [49380100]              	dd	int30h		; Reserved for
  3405                                  				; !!! Retro UNIX (RUNIX) !!!
  3406                                  				; !!! SINGLIX !!! System Calls
  3407 000137F0 [58170000]              	dd	int31h		; Video BIOS (IBM PC/AT, Int 10h)
  3408 000137F4 [250F0000]              	dd	int32h		; Keyboard Functions (IBM PC/AT, Int 16h)
  3409 000137F8 [CC4E0000]              	dd	int33h		; DISK I/O (IBM PC/AT, Int 13h)
  3410 000137FC [341F0100]              	dd	int34h		; #IOCTL# (I/O port access support for ring 3)
  3411 00013800 [DD610000]              	dd	int35h		; Time/Date Functions (IBM PC/AT, Int 1Ah)
  3412 00013804 [8A0D0000]              	dd	ignore_int	; INT 36h : Timer Functions	
  3413 00013808 [8A0D0000]              	dd	ignore_int	; INT 37h	
  3414 0001380C [8A0D0000]              	dd	ignore_int	; INT 38h
  3415 00013810 [8A0D0000]              	dd	ignore_int	; INT 39h
  3416 00013814 [8A0D0000]              	dd	ignore_int	; INT 3Ah	
  3417 00013818 [8A0D0000]              	dd	ignore_int	; INT 3Bh
  3418 0001381C [8A0D0000]              	dd	ignore_int	; INT 3Ch
  3419 00013820 [8A0D0000]              	dd	ignore_int	; INT 3Dh	
  3420 00013824 [8A0D0000]              	dd	ignore_int	; INT 3Eh
  3421 00013828 [8A0D0000]              	dd	ignore_int	; INT 3Fh
  3422 0001382C [BBCB0000]              	dd	sysent		; INT 40h : !!! TRDOS 386 System Calls !!!
  3423                                  	;dd	ignore_int
  3424 00013830 00000000                	dd	0
  3425                                  
  3426                                  ; 20/08/2014
  3427                                    ; /* This is the default interrupt "handler" :-) */ 
  3428                                    ; Linux v0.12 (head.s)
  3429                                  int_msg:
  3430 00013834 556E6B6E6F776E2069-     	db "Unknown interrupt ! ", 0
  3430 0001383D 6E7465727275707420-
  3430 00013846 212000             
  3431                                  
  3432                                  ; 15/04/2016
  3433                                  ; TRDOS 386 (TRDOS v2.0)
  3434                                  
  3435                                  ; 29/04/2016
  3436                                  int30h:
  3437                                  trdos_isc_routine:
  3438                                  	; 02/05/2016
  3439                                  	; 01/05/2016
  3440                                  	; 29/04/2016
  3441                                  	; 18/04/2016
  3442                                  	; 15/04/2016 (TRDOS 386 = TRDOS v2.0)
  3443                                  	; 17/04/2011 (TRDOS v1.0, 'IFC.ASM')
  3444                                  	; 03/02/2011 ('trdos_ifc_routine')
  3445                                  	;
  3446 00013849 8B1C24                  	mov	ebx, [esp] ; EIP (next)
  3447 0001384C 83EB02                  	sub	ebx, 2 ; EIP (CD ##h)
  3448                                  
  3449 0001384F 89C1                    	mov	ecx, eax
  3450 00013851 8A4301                  	mov	al, [ebx+1] ; CDh ##h
  3451                                  
  3452 00013854 66BA1000                	mov	dx, KDATA
  3453 00013858 8EDA                    	mov	ds, dx
  3454 0001385A 8EC2                    	mov	es, dx
  3455                                  
  3456 0001385C FC                      	cld
  3457 0001385D 8B15[48770100]          	mov	edx, [k_page_dir]
  3458 00013863 0F22DA                  	mov	cr3, edx
  3459                                  
  3460 00013866 E8E608FFFF              	call	bytetohex
  3461 0001386B 66A3[B9360100]          	mov	[int_num_str], ax
  3462                                  
  3463 00013871 89D8                    	mov	eax, ebx ; EIP
  3464 00013873 E81909FFFF              	call	dwordtohex
  3465 00013878 8915[D5360100]          	mov	[eip_str], edx
  3466 0001387E A3[D9360100]            	mov	[eip_str+4], eax
  3467                                  
  3468 00013883 89C8                    	mov	eax, ecx
  3469 00013885 E80709FFFF              	call	dwordtohex
  3470 0001388A 8915[C4360100]          	mov	[eax_str], edx
  3471 00013890 A3[C8360100]            	mov	[eax_str+4], eax 	
  3472                                  
  3473 00013895 43                      	inc	ebx
  3474 00013896 8A03                    	mov	al, [ebx] ; Interrupt number
  3475                                  
  3476                                  trdos_isc_handler:
  3477 00013898 80FE30                  	cmp	dh, 30h ; Retro UNIX, SINGLIX System calls
  3478 0001389B 7507                    	jne	short trdos_usi_handler
  3479 0001389D BE[56360100]            	mov	esi, isc_msg
  3480 000138A2 EB05                    	jmp	short loc_write_inv_system_call_msg
  3481                                  
  3482                                  trdos_usi_handler:
  3483 000138A4 BE[6C360100]            	mov	esi, usi_msg
  3484                                  
  3485                                  loc_write_inv_system_call_msg:
  3486 000138A9 E8FC33FFFF              	call	print_msg
  3487                                  	; 29/04/2016
  3488 000138AE BE[A2360100]            	mov	esi, inv_msg_for_trdos_v2
  3489 000138B3 E8F233FFFF              	call	print_msg
  3490                                  
  3491                                  loc_ifc_terminate_process:
  3492                                  	; u.uno = process number
  3493                                  	; 29/04/2016
  3494                                  
  3495                                  	; 02/05/2016
  3496 000138B8 FE05[10010300]          	inc	byte [sysflg] ; 0FFh -> 0
  3497                                  
  3498 000138BE B801000000              	mov	eax, 1
  3499 000138C3 E9E495FFFF              	jmp	sysexit
  3500                                  
  3501                                  ; 07/03/2015
  3502                                  ; Temporary Code
  3503                                  display_disks:
  3504 000138C8 803D[7C650000]00        	cmp 	byte [fd0_type], 0
  3505 000138CF 7605                    	jna 	short ddsks1
  3506 000138D1 E87D000000              	call	pdskm
  3507                                  ddsks1:
  3508 000138D6 803D[7D650000]00        	cmp	byte [fd1_type], 0
  3509 000138DD 760C                    	jna	short ddsks2
  3510 000138DF C605[233A0100]31        	mov	byte [dskx], '1'
  3511 000138E6 E868000000              	call	pdskm
  3512                                  ddsks2:
  3513 000138EB 803D[7E650000]00        	cmp	byte [hd0_type], 0
  3514 000138F2 7654                    	jna	short ddsk6
  3515 000138F4 66C705[213A0100]68-     	mov	word [dsktype], 'hd'
  3515 000138FC 64                 
  3516 000138FD C605[233A0100]30        	mov	byte [dskx], '0'
  3517 00013904 E84A000000              	call	pdskm
  3518                                  ddsks3:
  3519 00013909 803D[7F650000]00        	cmp	byte [hd1_type], 0
  3520 00013910 7636                    	jna	short ddsk6
  3521 00013912 C605[233A0100]31        	mov	byte [dskx], '1'
  3522 00013919 E835000000              	call	pdskm
  3523                                  ddsks4:
  3524 0001391E 803D[80650000]00        	cmp	byte [hd2_type], 0
  3525 00013925 7621                    	jna	short ddsk6
  3526 00013927 C605[233A0100]32        	mov	byte [dskx], '2'
  3527 0001392E E820000000              	call	pdskm
  3528                                  ddsks5:
  3529 00013933 803D[81650000]00        	cmp	byte [hd3_type], 0
  3530 0001393A 760C                    	jna	short ddsk6
  3531 0001393C C605[233A0100]33        	mov	byte [dskx], '3'
  3532 00013943 E80B000000              	call	pdskm
  3533                                  ddsk6:
  3534 00013948 BE[4B3A0100]            	mov	esi, nextline
  3535 0001394D E806000000              	call	pdskml
  3536                                  pdskm_ok:
  3537 00013952 C3                      	retn
  3538                                  pdskm:
  3539 00013953 BE[1F3A0100]            	mov	esi, dsk_ready_msg
  3540                                  pdskml:	
  3541 00013958 AC                      	lodsb
  3542 00013959 08C0                    	or	al, al
  3543 0001395B 74F5                    	jz	short pdskm_ok
  3544 0001395D 56                      	push	esi
  3545                                  	; 13/05/2016
  3546 0001395E BB07000000                      mov     ebx, 7  ; Black background, 
  3547                                  			; light gray forecolor
  3548                                  			; Video page 0 (bh=0)
  3549 00013963 E809E9FEFF              	call	_write_tty
  3550 00013968 5E                      	pop	esi
  3551 00013969 EBED                    	jmp	short pdskml
  3552                                  
  3553 0001396B 90                      Align 2
  3554                                  	; 21/08/2014
  3555                                  exc_msg:
  3556 0001396C 435055206578636570-     	db "CPU exception ! "
  3556 00013975 74696F6E202120     
  3557                                  excnstr: 		; 25/08/2014
  3558 0001397C 3F3F68202045495020-     	db "??h", "  EIP : "
  3558 00013985 3A20               
  3559                                  EIPstr: ; 29/08/2014
  3560 00013987 00<rep Ch>              	times 12 db 0
  3561                                  
  3562                                  	; 23/02/2015
  3563                                  	; 25/08/2014
  3564                                  ;scounter:
  3565                                  ;	db 5
  3566                                  ;	db 19
  3567                                  
  3568                                  ; 06/11/2014
  3569                                  ; Memory Information message
  3570                                  ; 14/08/2015
  3571                                  msg_memory_info:
  3572 00013993 07                      	db	07h
  3573 00013994 0D0A                    	db	0Dh, 0Ah
  3574                                  	;db 	"MEMORY ALLOCATION INFO", 0Dh, 0Ah, 0Dh, 0Ah
  3575 00013996 546F74616C206D656D-     	db	"Total memory : "
  3575 0001399F 6F7279203A20       
  3576                                  mem_total_b_str: ; 10 digits
  3577 000139A5 303030303030303030-     	db	"0000000000 bytes", 0Dh, 0Ah
  3577 000139AE 302062797465730D0A 
  3578 000139B7 202020202020202020-     	db	"               ", 20h, 20h, 20h
  3578 000139C0 202020202020202020 
  3579                                  mem_total_p_str: ; 7 digits
  3580 000139C9 303030303030302070-     	db	"0000000 pages", 0Dh, 0Ah
  3580 000139D2 616765730D0A       
  3581 000139D8 0D0A                    	db 	0Dh, 0Ah
  3582 000139DA 46726565206D656D6F-     	db	"Free memory  : "
  3582 000139E3 727920203A20       
  3583                                  free_mem_b_str:  ; 10 digits
  3584 000139E9 3F3F3F3F3F3F3F3F3F-     	db	"?????????? bytes", 0Dh, 0Ah
  3584 000139F2 3F2062797465730D0A 
  3585 000139FB 202020202020202020-     	db	"               ", 20h, 20h, 20h
  3585 00013A04 202020202020202020 
  3586                                  free_mem_p_str:  ; 7 digits
  3587 00013A0D 3F3F3F3F3F3F3F2070-     	db	"??????? pages", 0Dh, 0Ah
  3587 00013A16 616765730D0A       
  3588 00013A1C 0D0A00                  	db	0Dh, 0Ah, 0
  3589                                  
  3590                                  dsk_ready_msg:
  3591 00013A1F 0D0A                    	db 	0Dh, 0Ah
  3592                                  dsktype:
  3593 00013A21 6664                    	db	'fd'
  3594                                  dskx:
  3595 00013A23 30                      	db	'0'
  3596 00013A24 20                      	db	20h
  3597 00013A25 697320524541445920-     	db 	'is READY ...'
  3597 00013A2E 2E2E2E             
  3598 00013A31 00                      	db 	0
  3599                                  
  3600                                  setup_error_msg:
  3601 00013A32 0D0A                    	db	0Dh, 0Ah
  3602 00013A34 4469736B2053657475-     	db	'Disk Setup Error !' 
  3602 00013A3D 70204572726F722021 
  3603 00013A46 0D0A00                  	db	0Dh, 0Ah,0
  3604                                  
  3605                                  next2line: ; 08/02/2016
  3606 00013A49 0D0A                    	db	0Dh, 0Ah
  3607                                  nextline:
  3608 00013A4B 0D0A00                  	db 	0Dh, 0Ah, 0
  3609                                  
  3610                                  ; temporary
  3611                                  ; 19/12/2020
  3612                                  msg_lfb_addr:
  3613                                  	;db	0Dh, 0Ah
  3614 00013A4E 4C696E656172206672-     	db	"Linear frame buffer at "
  3614 00013A57 616D65206275666665-
  3614 00013A60 7220617420         
  3615                                  lfb_addr_str: ; 8 (hex) digits
  3616 00013A65 303030303030303068-     	db	"00000000h", 0Dh, 0Ah
  3616 00013A6E 0D0A               
  3617 00013A70 0D0A00                  	db	0Dh, 0Ah, 0
  3618                                  
  3619                                  ; KERNEL - SYSINIT Messages
  3620                                  ; 24/08/2015
  3621                                  ; 13/04/2015 - (Retro UNIX 386 v1 Beginning)
  3622                                  ; 14/07/2013
  3623                                  ;kernel_init_err_msg:
  3624                                  ;	db 0Dh, 0Ah
  3625                                  ;	db 07h
  3626                                  ;	db 'Kernel initialization ERROR !'
  3627                                  ;	db 0Dh, 0Ah, 0 
  3628                                  
  3629                                  ;welcome_msg: 
  3630                                  ;	db 0Dh, 0Ah
  3631                                  ;	db 07h
  3632                                  ;	db 'Welcome to TRDOS 386 Operating System !'
  3633                                  ;	db 0Dh, 0Ah
  3634                                  ;	db 'by Erdogan Tan - 31/12/2017 (v2.0.0)'
  3635                                  ;	db 0Dh, 0Ah, 0
  3636                                  
  3637                                  panic_msg:
  3638 00013A73 0D0A07                  	db 0Dh, 0Ah, 07h
  3639 00013A76 4552524F523A204B65-     	db 'ERROR: Kernel Panic !'
  3639 00013A7F 726E656C2050616E69-
  3639 00013A88 632021             
  3640 00013A8B 0D0A00                  	db 0Dh, 0Ah, 0
  3641                                  
  3642                                  ;msgl_drv_not_ready: 
  3643                                  ;	db 07h, 0Dh, 0Ah
  3644                                  ;       db 'Drive not ready or read error !'
  3645                                  ;       db 0Dh, 0Ah, 0
  3646                                  
  3647                                  starting_msg:
  3648                                  	;;;db "Turkish Rational DOS v2.0 [18/04/2021] ...", 0
  3649                                  	;;db "Turkish Rational DOS v2.0 [11/08/2022] ...", 0
  3650                                  	;db "Turkish Rational DOS v2.0 [30/08/2023] ...", 0
  3651 00013A8E 5475726B6973682052-     	db "Turkish Rational DOS v2.0 [29/11/2023] ...", 0
  3651 00013A97 6174696F6E616C2044-
  3651 00013AA0 4F532076322E30205B-
  3651 00013AA9 32392F31312F323032-
  3651 00013AB2 335D202E2E2E00     
  3652                                  
  3653                                  NextLine:
  3654 00013AB9 0D0A00                  	db 0Dh, 0Ah, 0
  3655                                  
  3656                                  %include 'audio.s' ; 03/04/2017
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel) - v2.0.7 - audio.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 27/11/2023  (Previous: 06/08/2022 - Kernel v2.0.5)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 03/04/2017
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ****************************************************************************
    10                              <1> 
    11                              <1> ; AUDIO CONTROLLER & CODEC DEFINITIONS & CODE FOR TRDOS 386
    12                              <1> 
    13                              <1> ;=============================================================================
    14                              <1> ;               EQUATES
    15                              <1> ;=============================================================================
    16                              <1> 
    17                              <1> ; PCI EQUATES
    18                              <1> 
    19                              <1> BIT0  EQU 1
    20                              <1> BIT1  EQU 2
    21                              <1> BIT2  EQU 4
    22                              <1> BIT3  EQU 8
    23                              <1> BIT4  EQU 10h
    24                              <1> BIT5  EQU 20h
    25                              <1> BIT6  EQU 40h
    26                              <1> BIT7  EQU 80h
    27                              <1> BIT8  EQU 100h
    28                              <1> BIT9  EQU 200h
    29                              <1> BIT10 EQU 400h
    30                              <1> BIT11 EQU 800h
    31                              <1> BIT12 EQU 1000h
    32                              <1> BIT13 EQU 2000h
    33                              <1> BIT14 EQU 4000h
    34                              <1> BIT15 EQU 8000h
    35                              <1> BIT16 EQU 10000h
    36                              <1> BIT17 EQU 20000h
    37                              <1> BIT18 EQU 40000h
    38                              <1> BIT19 EQU 80000h
    39                              <1> BIT20 EQU 100000h
    40                              <1> BIT21 EQU 200000h
    41                              <1> BIT22 EQU 400000h
    42                              <1> BIT23 EQU 800000h
    43                              <1> BIT24 EQU 1000000h
    44                              <1> BIT25 EQU 2000000h
    45                              <1> BIT26 EQU 4000000h
    46                              <1> BIT27 EQU 8000000h
    47                              <1> BIT28 EQU 10000000h
    48                              <1> BIT29 EQU 20000000h
    49                              <1> BIT30 EQU 40000000h
    50                              <1> BIT31 EQU 80000000h
    51                              <1> NOT_BIT31 EQU 7FFFFFFFh
    52                              <1> 
    53                              <1> ; PCI equates
    54                              <1> ; PCI function address (PFA)
    55                              <1> ; bit 31 = 1
    56                              <1> ; bit 23:16 = bus number     (0-255)
    57                              <1> ; bit 15:11 = device number  (0-31)
    58                              <1> ; bit 10:8 = function number (0-7)
    59                              <1> ; bit 7:0 = register number  (0-255)
    60                              <1> 
    61                              <1> IO_ADDR_MASK    EQU     0FFFEh	; mask off bit 0 for reading BARs
    62                              <1> PCI_INDEX_PORT  EQU     0CF8h
    63                              <1> PCI_DATA_PORT   EQU     0CFCh
    64                              <1> PCI32           EQU     BIT31	; bitflag to signal 32bit access
    65                              <1> PCI16           EQU     BIT30	; bitflag for 16bit access
    66                              <1> NOT_PCI32_PCI16	EQU	03FFFFFFFh ; NOT BIT31+BIT30 ; 19/03/2017
    67                              <1> 
    68                              <1> PCI_FN0         EQU     0 << 8
    69                              <1> PCI_FN1         EQU     1 << 8
    70                              <1> PCI_FN2         EQU     2 << 8
    71                              <1> PCI_FN3         EQU     3 << 8
    72                              <1> PCI_FN4         EQU     4 << 8
    73                              <1> PCI_FN5         EQU     5 << 8
    74                              <1> PCI_FN6         EQU     6 << 8
    75                              <1> PCI_FN7         EQU     7 << 8
    76                              <1> 
    77                              <1> PCI_CMD_REG	EQU	04h	; reg 04, command reg
    78                              <1> IO_ENA		EQU	BIT0	; i/o decode enable
    79                              <1> MEM_ENA		EQU	BIT1	; memory decode enable
    80                              <1> BM_ENA		EQU     BIT2	; bus master enable
    81                              <1> 
    82                              <1> ; VIA VT8233 EQUATES
    83                              <1> 
    84                              <1> VIA_VID		equ 1106h	; VIA's PCI vendor ID
    85                              <1> VT8233_DID      equ 3059h	; VT8233 (VT8235) device ID
    86                              <1> 		
    87                              <1> PCI_IO_BASE          equ 10h
    88                              <1> AC97_INT_LINE        equ 3Ch
    89                              <1> VIA_ACLINK_CTRL      equ 41h
    90                              <1> VIA_ACLINK_STAT      equ 40h
    91                              <1> VIA_ACLINK_C00_READY equ 01h ; primary codec ready
    92                              <1> 	
    93                              <1> VIA_REG_AC97	     equ 80h ; dword
    94                              <1> 
    95                              <1> VIA_ACLINK_CTRL_ENABLE	equ   80h ; 0: disable, 1: enable
    96                              <1> VIA_ACLINK_CTRL_RESET	equ   40h ; 0: assert, 1: de-assert
    97                              <1> VIA_ACLINK_CTRL_SYNC	equ   20h ; 0: release SYNC, 1: force SYNC hi
    98                              <1> VIA_ACLINK_CTRL_VRA	equ   08h ; 0: disable VRA, 1: enable VRA
    99                              <1> VIA_ACLINK_CTRL_PCM	equ   04h ; 0: disable PCM, 1: enable PCM
   100                              <1> 					; 3D Audio Channel slots 3/4
   101                              <1> VIA_ACLINK_CTRL_INIT	equ  (VIA_ACLINK_CTRL_ENABLE +                               VIA_ACLINK_CTRL_RESET +                               VIA_ACLINK_CTRL_PCM +                               VIA_ACLINK_CTRL_VRA)
   105                              <1> 
   106                              <1> CODEC_AUX_VOL		equ   04h
   107                              <1> VIA_REG_AC97_BUSY	equ   01000000h ;(1<<24) 
   108                              <1> VIA_REG_AC97_CMD_SHIFT	equ   10h ; 16
   109                              <1> VIA_REG_AC97_PRIMARY_VALID equ 02000000h ;(1<<25)
   110                              <1> VIA_REG_AC97_READ	equ   00800000h ;(1<<23)
   111                              <1> VIA_REG_AC97_CODEC_ID_SHIFT   equ  1Eh ; 30
   112                              <1> VIA_REG_AC97_CODEC_ID_PRIMARY equ  0
   113                              <1> VIA_REG_AC97_DATA_SHIFT equ   0
   114                              <1> VIADEV_PLAYBACK         equ   0
   115                              <1> VIA_REG_OFFSET_STATUS   equ   0    ;; byte - channel status
   116                              <1> VIA_REG_OFFSET_CONTROL  equ   01h  ;; byte - channel control
   117                              <1> VIA_REG_CTRL_START	equ   80h  ;; WO
   118                              <1> VIA_REG_CTRL_TERMINATE  equ   40h  ;; WO
   119                              <1> VIA_REG_CTRL_PAUSE      equ   08h  ;; RW
   120                              <1> VIA_REG_CTRL_RESET      equ   01h  ;; RW - probably reset? undocumented
   121                              <1> VIA_REG_OFFSET_STOP_IDX equ   08h  ;; dword - stop index, channel type, sample rate
   122                              <1> VIA8233_REG_TYPE_16BIT  equ   200000h ;; RW
   123                              <1> VIA8233_REG_TYPE_STEREO equ   100000h ;; RW
   124                              <1> VIA_REG_OFFSET_CURR_INDEX equ 0Fh ;; byte - channel current index (for via8233 only)
   125                              <1> VIA_REG_OFFSET_TABLE_PTR equ  04h  ;; dword - channel table pointer
   126                              <1> VIA_REG_OFFSET_CURR_PTR equ   04h  ;; dword - channel current pointer
   127                              <1> VIA_REG_OFS_PLAYBACK_VOLUME_L equ  02h ;; byte
   128                              <1> VIA_REG_OFS_PLAYBACK_VOLUME_R equ  03h ;; byte
   129                              <1> VIA_REG_CTRL_AUTOSTART	equ   20h
   130                              <1> VIA_REG_CTRL_INT_EOL	equ   02h
   131                              <1> VIA_REG_CTRL_INT_FLAG	equ   01h
   132                              <1> VIA_REG_CTRL_INT	equ  (VIA_REG_CTRL_INT_FLAG +                               VIA_REG_CTRL_INT_EOL +                               VIA_REG_CTRL_AUTOSTART)
   135                              <1> 
   136                              <1> VIA_REG_STAT_STOP_IDX	equ   10h    ;; RO ; 27/07/2020
   137                              <1> 				     ; current index = stop index
   138                              <1> VIA_REG_STAT_STOPPED	equ   04h    ;; RWC
   139                              <1> VIA_REG_STAT_EOL	equ   02h    ;; RWC
   140                              <1> VIA_REG_STAT_FLAG	equ   01h    ;; RWC
   141                              <1> VIA_REG_STAT_ACTIVE	equ   80h    ;; RO
   142                              <1> ; 28/11/2016
   143                              <1> VIA_REG_STAT_LAST	equ   40h    ;; RO
   144                              <1> VIA_REG_STAT_TRIGGER_QUEUED equ 08h  ;; RO
   145                              <1> VIA_REG_CTRL_INT_STOP	equ   04h  ; Interrupt on Current Index = Stop Index
   146                              <1> 		   		   ; and End of Block
   147                              <1> 
   148                              <1> VIA_REG_OFFSET_CURR_COUNT equ 0Ch ;; dword - channel current count, index
   149                              <1> 
   150                              <1> PORTB		EQU	061h
   151                              <1> REFRESH_STATUS	EQU	010h	; Refresh signal status
   152                              <1> 
   153                              <1> ; AC97 Codec registers.
   154                              <1> 
   155                              <1> ; 22/07/2020
   156                              <1> ; REALTEK ALC655 and ADI SOUNDMAX AD1980 CODEC MIXER REGISTERS
   157                              <1> 
   158                              <1> ; each codec/mixer register is 16bits
   159                              <1> 
   160                              <1> CODEC_RESET_REG                 equ     00h	; reset codec
   161                              <1> CODEC_MASTER_VOL_REG            equ     02h	; master volume
   162                              <1> CODEC_HP_VOL_REG                equ     04h	; headphone volume ; AD1980
   163                              <1> CODEC_MASTER_MONO_VOL_REG       equ     06h	; master mono volume (mono-out)
   164                              <1> ;CODEC_MASTER_TONE_REG          equ     08h	; master tone (R+L) ; (not used)
   165                              <1> CODEC_PCBEEP_VOL_REG            equ     0Ah	; PC beep volume ; ALC655
   166                              <1> CODEC_PHONE_VOL_REG             equ     0Ch	; phone volume
   167                              <1> CODEC_MIC_VOL_REG               equ     0Eh	; mic volume
   168                              <1> CODEC_LINE_IN_VOL_REG           equ     10h	; line in volume
   169                              <1> CODEC_CD_VOL_REG                equ     12h	; CD volume
   170                              <1> ;CODEC_VID_VOL_REG              equ     14h	; video volume ; (not used)
   171                              <1> CODEC_AUX_VOL_REG               equ     16h	; aux volume
   172                              <1> CODEC_PCM_OUT_REG               equ     18h	; PCM out volume
   173                              <1> CODEC_RECORD_SELECT_REG         equ     1Ah	; record select
   174                              <1> CODEC_RECORD_VOL_REG            equ     1Ch	; record volume (record gain)
   175                              <1> ;CODEC_RECORD_MIC_VOL_REG       equ     1Eh	; record mic volume ; (not used)
   176                              <1> CODEC_GP_REG                    equ     20h	; general purpose
   177                              <1> ;CODEC_3D_CONTROL_REG           equ     22h	; 3D control
   178                              <1> ;;CODEC_AUDIO_INT_PAGING_REG    equ	24h	; audio int & paging ; (not used) 
   179                              <1> CODEC_POWER_CTRL_REG            equ     26h	; power down control
   180                              <1> CODEC_EXT_AUDIO_REG             equ     28h	; extended audio ID
   181                              <1> CODEC_EXT_AUDIO_CTRL_REG        equ     2Ah	; extended audio status/control
   182                              <1> CODEC_PCM_FRONT_DACRATE_REG     equ     2Ch	; PCM front sample rate
   183                              <1> CODEC_PCM_SURND_DACRATE_REG     equ     2Eh	; PCM surround sample rate
   184                              <1> CODEC_PCM_LFE_DACRATE_REG       equ     30h	; PCM Center/LFE sample rate
   185                              <1> CODEC_LR_ADCRATE_REG            equ     32h	; PCM input sample rate
   186                              <1> CODEC_MIC_ADCRATE_REG           equ     34h	; mic in sample rate  ; AD1980
   187                              <1> CODEC_PCM_LFE_VOL_REG           equ     36h	; PCM Center/LFE volume
   188                              <1> CODEC_PCM_SURND_VOL_REG         equ     38h	; PCM surround volume
   189                              <1> ;CODEC_SPDIF_CTRL_REG           equ     3Ah	; S/PDIF control
   190                              <1> ; 22/07/2020
   191                              <1> CODEC_MISC_CRTL_BITS_REG	equ	76h	; misc control bits ; AD1980
   192                              <1> ;	
   193                              <1> CODEC_VENDOR_ID1		equ	7Ch	; REALTEK: 414Ch, ADI: 4144h	
   194                              <1> CODEC_VENDOR_ID2		equ	7Eh	; REALTEK: 4760h, ADI: 5370h	
   195                              <1> 
   196                              <1> ; VT8233 SGD bits (21/04/2017)
   197                              <1> FLAG	EQU BIT30
   198                              <1> EOL	EQU BIT31
   199                              <1> 
   200                              <1> ; INTEL ICH EQUATES
   201                              <1> ; 28/05/2017
   202                              <1> INTEL_VID	equ	8086h	; Intel's PCI vendor ID
   203                              <1> ; 20/11/2023
   204                              <1> ; (playwav2.com, ac97.inc, Erdogan Tan, 11/11/2023)
   205                              <1> ; 03/11/2023 - Erdogan Tan (Ref: MenuetOS AC97 WAV Player source code, 2004)
   206                              <1> SIS_VID		equ	1039h
   207                              <1> NVIDIA_VID	equ	10DEh	 ; Ref: MPXPLAY/SBEMU/KOLIBRIOS AC97 source c.
   208                              <1> AMD_VID		equ	1022h
   209                              <1> ;
   210                              <1> ICH_DID		equ	2415h	; ICH (82801AA) device ID
   211                              <1> ; 20/11/2023
   212                              <1> ; (playwav2.com, ac97.inc, Erdogan Tan, 11/11/2023)
   213                              <1> ; 17/02/2017 (Erdogan Tan, ref: ALSA Device IDs, ALSA project)
   214                              <1> ICH0_DID        equ     2425h	; ICH0
   215                              <1> ICH2_DID        equ     2445h 	; ICH2
   216                              <1> ICH3_DID	equ     2485h	; ICH3
   217                              <1> ICH4_DID        equ     24C5h	; ICH4
   218                              <1> ICH5_DID	equ     24D5h	; ICH5 
   219                              <1> ICH6_DID	equ     266Eh	; ICH6
   220                              <1> ESB6300_DID	equ     25A6h	; 6300ESB
   221                              <1> ESB631X_DID	equ     2698h	; 631XESB
   222                              <1> ICH7_DID	equ	27DEh	; ICH7
   223                              <1> ; 03/11/2023 - Erdogan Tan (Ref: MenuetOS AC97 WAV Player source code, 2004)
   224                              <1> MX82440_DID	equ	7195h
   225                              <1> SI7012_DID	equ	7012h
   226                              <1> NFORCE_DID	equ	01B1h
   227                              <1> NFORCE2_DID	equ	006Ah
   228                              <1> AMD8111_DID	equ	746Dh
   229                              <1> AMD768_DID	equ	7445h
   230                              <1> ; 03/11/2023 - Erdogan Tan - Ref: MPXPLAY/SBEMU/KOLIBRIOS AC97 source code
   231                              <1> CK804_DID	equ	0059h	; NFORCE4
   232                              <1> MCP04_DID	equ	003Ah
   233                              <1> CK8_DID		equ	008Ah
   234                              <1> NFORCE3_DID	equ	00DAh
   235                              <1> CK8S_DID	equ	00EAh
   236                              <1> 
   237                              <1> NAMBAR_REG      equ	10h	; native audio mixer Base Address Register
   238                              <1> NABMBAR_REG     equ	14h	; native audio bus mastering Base Addr Reg
   239                              <1> 
   240                              <1> PI_CR_REG       equ     0Bh     ; PCM in Control Register
   241                              <1> PO_CR_REG	equ     1Bh     ; PCM out Control Register
   242                              <1> MC_CR_REG	equ     2Bh     ; MIC in Control Register
   243                              <1> 
   244                              <1> PI_SR_REG	equ     6       ; PCM in Status register
   245                              <1> PO_SR_REG	equ     16h     ; PCM out Status register
   246                              <1> MC_SR_REG	equ     26h     ; MIC in Status register
   247                              <1> 
   248                              <1> IOCE 		equ     BIT4    ; interrupt on complete enable.
   249                              <1> FEIFE		equ     BIT3    ; set if you want an interrupt to fire
   250                              <1> LVBIE		equ     BIT2    ; last valid buffer interrupt enable.
   251                              <1> RR 		equ     BIT1    ; reset registers. Nukes all regs
   252                              <1>                                 ; except bits 4:2 of this register.
   253                              <1>                                 ; Only set this bit if BIT 0 is 0
   254                              <1> RPBM		equ     BIT0    ; Run/Pause
   255                              <1> 				; set this bit to start the codec!
   256                              <1> 
   257                              <1> PI_BDBAR_REG	equ     0       ; PCM in buffer descriptor BAR
   258                              <1> PO_BDBAR_REG	equ     10h     ; PCM out buffer descriptor BAR
   259                              <1> MC_BDBAR_REG	equ     20h     ; MIC in buffer descriptor BAR
   260                              <1> 
   261                              <1> PI_CIV_REG	equ     4       ; PCM in current Index value (RO)
   262                              <1> PO_CIV_REG	equ     14h     ; PCM out current Index value (RO)
   263                              <1> MC_CIV_REG 	equ     24h     ; MIC in current Index value (RO)
   264                              <1> 
   265                              <1> PI_LVI_REG	equ     5       ; PCM in Last Valid Index
   266                              <1> PO_LVI_REG	equ     15h     ; PCM out Last Valid Index
   267                              <1> MC_LVI_REG	equ     25h     ; MIC in Last Valid Index
   268                              <1> 
   269                              <1> IOC		equ     BIT31	; Fire an interrupt whenever this
   270                              <1>                 		; buffer is complete.
   271                              <1> BUP		equ     BIT30	; Buffer Underrun Policy.
   272                              <1> 
   273                              <1> GLOB_CNT_REG	equ     2Ch     ; Global Control Register
   274                              <1> GLOB_STS_REG	equ     30h     ; Global Status register (RO)
   275                              <1> 
   276                              <1> CTRL_ST_CREADY	equ   BIT8+BIT9+BIT28 ; Primary Codec Ready
   277                              <1> 
   278                              <1> CODEC_REG_POWERDOWN   equ 26h
   279                              <1> CODEC_REG_ST          equ 26h
   280                              <1> 
   281                              <1> ; 22/06/2017
   282                              <1> PO_PICB_REG	equ 18h	; PCM Out Position In Current Buffer Register
   283                              <1> 
   284                              <1> ; 19/11/2023
   285                              <1> AC97_EA_VRA	equ BIT0
   286                              <1> ; 24/11/2023
   287                              <1> BCIS		equ BIT3  ; Buffer Completion Interrupt Status
   288                              <1> 
   289                              <1> ;=============================================================================
   290                              <1> ;               CODE
   291                              <1> ;=============================================================================
   292                              <1> 
   293                              <1> ; CODE for INTEL ICH AC'97 AUDIO CONTROLLER
   294                              <1> 
   295                              <1> DetectICH:
   296                              <1> 	; 22/11/2023
   297                              <1> 	; 19/11/2023
   298                              <1> 	; 01/11/2023 - TRDOS 386 Kernel v2.0.7
   299                              <1> 	;; 10/06/2017
   300                              <1> 	;; 05/06/2017
   301                              <1> 	;; 29/05/2017
   302                              <1> 	;; 28/05/2017
   303                              <1> 	;mov	eax, (ICH_DID << 16) + INTEL_VID
   304                              <1>         ;call	pciFindDevice
   305                              <1>         ;jnc	short d_ac97_1
   306                              <1> 	;
   307                              <1> 	;; 01/11/2023
   308                              <1> 	;mov	eax, (NFORCE_DID << 16) + NFORCE_VID
   309                              <1>         ;call	pciFindDevice
   310                              <1>         ;jnc	short d_ac97_1
   311                              <1> 
   312                              <1> 	; 19/11/2023
   313 00013ABC BE[44480100]        <1> 	mov	esi, valid_ids	; address of Valid ICH (AC97) Device IDs
   314 00013AC1 B915000000          <1> 	mov	ecx, valid_id_count
   315                              <1> pfd_1:
   316 00013AC6 AD                  <1> 	lodsd
   317 00013AC7 E858000000          <1> 	call	pciFindDevice
   318 00013ACC 730F                <1> 	jnc	short d_ac97_1
   319 00013ACE E2F6                <1> 	loop	pfd_1
   320                              <1> 	;stc
   321                              <1> 
   322                              <1> d_ac97_0:
   323                              <1> ; couldn't find the audio device!
   324 00013AD0 C3                  <1> 	retn
   325                              <1> 
   326                              <1> ; CODE for VIA VT8233 AUDIO CONTROLLER
   327                              <1> 
   328                              <1> DetectVT8233:
   329                              <1> 	; 22/11/2023
   330                              <1> 	; 02/11/2023
   331                              <1> 	; 01/11/2023 - TRDOS 386 Kernel v2.0.7
   332                              <1> 	; 06/08/2022 - TRDOS 386 Kernel v2.0.5
   333                              <1> 	; 10/06/2017
   334                              <1> 	; 05/06/2017
   335                              <1> 	; 29/05/2017
   336                              <1> 	; 03/04/2017
   337 00013AD1 B806115930          <1> 	mov     eax, (VT8233_DID << 16) + VIA_VID
   338 00013AD6 E849000000          <1>         call    pciFindDevice
   339                              <1> ;       jnc     short d_vt8233_0
   340                              <1> ; couldn't find the audio device!
   341                              <1> ;	retn
   342 00013ADB 72F3                <1> 	jc	short d_ac97_0  ; 28/05/2017
   343                              <1> d_vt8233_0:
   344                              <1> 	; 24/03/2017 ('player.asm')
   345                              <1> 	; 12/11/2016 
   346                              <1> 	; Erdogan Tan - 8/11/2016
   347                              <1> 	; References: Kolibrios - vt823x.asm (2016)
   348                              <1> 	;	      VIA VT8235 V-Link South Bridge (VT8235-VIA.PDF)(2002)
   349                              <1> 	;	      lowlevel.eu - AC97 (2016)
   350                              <1> 	;	      .wav player for DOS by Jeff Leyda (2002) -this file-
   351                              <1> 	;	      Linux kernel - via82xx.c (2016)
   352                              <1> d_ac97_1:
   353                              <1> 	; eax = BUS/DEV/FN
   354                              <1> 	;	00000000BBBBBBBBDDDDDFFF00000000
   355                              <1> 	; edx = DEV/VENDOR
   356                              <1> 	;	DDDDDDDDDDDDDDDDVVVVVVVVVVVVVVVV
   357                              <1> 
   358 00013ADD A3[78890100]        <1> 	mov	[audio_dev_id], eax
   359 00013AE2 8915[7C890100]      <1> 	mov	[audio_vendor], edx
   360                              <1> 
   361                              <1> 	; 22/11/2023
   362                              <1> 	;; init controller
   363                              <1> 	;mov	al, PCI_CMD_REG ; command register (04h)
   364                              <1> 	;call	pciRegRead32
   365                              <1> 	;
   366                              <1> 	;; eax = BUS/DEV/FN/REG
   367                              <1> 	;; edx = STATUS/COMMAND
   368                              <1> 	;; 	SSSSSSSSSSSSSSSSCCCCCCCCCCCCCCCC
   369                              <1> 	;mov	[audio_stats_cmd], edx
   370                              <1> 
   371 00013AE8 B010                <1> 	mov	al, PCI_IO_BASE ; IO base address register (10h)
   372                              <1> 	;mov	al, NAMBAR_REG	; Native Audio Mixer BAR (10h)
   373 00013AEA E8C0000000          <1> 	call	pciRegRead32
   374                              <1> 
   375                              <1> 	;cmp	word [audio_vendor], INTEL_VID ; 8086h ; AC'97 ?
   376                              <1> 	;;jne	short d_vt8233_1
   377                              <1> 	;; 01/11/2023
   378                              <1> 	;je	short d_ac97_3
   379                              <1> 	;cmp	word [audio_vendor], NFORCE_VID ; 10DEh ; AC'97
   380                              <1> 	;jne	short d_vt8233_1	
   381                              <1> 	; 02/11/2023
   382 00013AEF 66813D[7C890100]06- <1> 	cmp	word [audio_vendor], VIA_VID	; 1106h ; VT8233-VT8237R 
   382 00013AF7 11                  <1>
   383 00013AF8 7411                <1> 	je	short d_vt8233_1
   384                              <1> d_ac97_3:
   385                              <1> 	;and	dx, 0FFFEh ; Audio Codec IO_ADDR_MASK
   386                              <1> 	; 06/08/2022
   387 00013AFA 80E2FE              <1> 	and	dl, 0FEh
   388 00013AFD 668915[74890100]    <1> 	mov	[NAMBAR], dx
   389                              <1> 
   390 00013B04 B014                <1> 	mov	al, NABMBAR_REG ; Native Audio Bus Mastering BAR (14h)
   391 00013B06 E8A4000000          <1> 	call	pciRegRead32	
   392                              <1> 
   393                              <1> 	;;and	dx, 0FFC0h ; Audio Controller IO_ADDR_MASK
   394                              <1> 	;; 06/08/2022
   395                              <1> 	;and	dl, 0C0h
   396                              <1> 	;mov	[NABMBAR], dx
   397                              <1>         ;;mov	[audio_io_base], dx
   398                              <1> 	;
   399                              <1> 	;jmp	short d_ac97_2
   400                              <1> 	; 02/11/2023
   401                              <1> 	; NABMBAR = audio_io_base
   402                              <1> 
   403                              <1> d_vt8233_1:
   404                              <1> 	;and	dx, 0FFC0h ; Audio Controller IO_ADDR_MASK 
   405                              <1> 	; 06/08/2022
   406 00013B0B 80E2C0              <1> 	and	dl, 0C0h
   407 00013B0E 668915[76890100]    <1>         mov     [audio_io_base], dx
   408                              <1> 
   409                              <1> d_ac97_2:
   410                              <1> 	; 10/06/2017
   411 00013B15 B03C                <1> 	mov	al, AC97_INT_LINE ; Interrupt Line Register (3Ch)
   412                              <1> 	;call	pciRegRead32
   413 00013B17 E880000000          <1> 	call	pciRegRead8
   414                              <1> 
   415                              <1> 	;;and 	edx, 0FFh
   416                              <1> 	; 06/08/2022
   417                              <1> 	;and	dx, 0FFh
   418                              <1> 
   419 00013B1C 8815[72890100]      <1> 	mov     [audio_intr], dl
   420                              <1> 
   421 00013B22 C3                  <1> 	retn
   422                              <1> 
   423                              <1> 	; (Note: Interrupts are already enabled by TRDOS 386 kernel!)
   424                              <1> 	;mov	cx, dx
   425                              <1> 	;
   426                              <1> 	;in	al, 0A1h ; irq 8-15
   427                              <1> 	;mov	ah, al
   428                              <1> 	;in	al, 21h  ; irq 0-7 
   429                              <1> 	;btr	ax, dx	 ; unmask ; 17/03/2017
   430                              <1> 	;;bts	ax, dx   ; MASK interrupt ; 10/06/2017 
   431                              <1> 	;out	21h, al  ; irq <= 7
   432                              <1> 	;mov	al, ah
   433                              <1> 	;out	0A1h, al ; irq > 7
   434                              <1> 	;
   435                              <1> 	
   436                              <1> 	; 10/06/2017
   437                              <1> 	; === Intel ICH I/O Controller Hub Datasheet, Section 8.1.16 ===
   438                              <1> 	; PRQ[n]_ROUT Register (61h, PRQB) Bit 7:
   439                              <1> 	; Interrupt Routing Enable (IRQEN).
   440                              <1> 	; 0 = The corresponding PIRQ is routed to one of the ISA-compatible
   441                              <1> 	;     interrupts specified in bits[3:0].
   442                              <1> 	; 1 = The PIRQ is not routed to the 8259.
   443                              <1> 	; Note: If the PIRQ is intended to cause an interrupt to the ICHs 
   444                              <1> 	;	integrated I/O APIC, then this bit should be set to 0 and 
   445                              <1> 	;	the APIC_EN bit should be set to 1. 
   446                              <1> 	;	The IRQEN must be set to 0 and the PIRQ routed to 
   447                              <1> 	;	an 8259 interrupt via the IRQ Routing filed (bits[3:0).
   448                              <1> 	;	The corresponding 8259 interrupt must be masked via the 
   449                              <1> 	;	appropriated bit in the 8259s OCW1 (Interrupt Mask)
   450                              <1> 	;	register. The IOAPIC must then be enabled by setting 
   451                              <1> 	;	the APIC_EN bit in the GEN_CNTL register.
   452                              <1> 
   453                              <1> 	;mov	eax, 0F861h  ; D31:F0
   454                              <1> 	;	; AL=61h : PIRQ[B] Routing Control Reg, LPC interface
   455                              <1> 	;;mov	dl, [audio_intr]
   456                              <1> 	;call	pciRegWrite8
   457                              <1> 	;;mov	al, 0D0h	; General Control Register (GEN_CTL)
   458                              <1> 	;;call	pciRegRead32
   459                              <1> 	;;or	edx, 100h	; Bit 8, APIC_EN (Enable I/O APIC) 
   460                              <1> 	;;call	pciRegWrite32
   461                              <1> 	;;and	edx, ~100h
   462                              <1> 	;;call	pciRegWrite32	; Bit 8, APIC_EN (Disable I/O APIC) 
   463                              <1> 	;
   464                              <1> 
   465                              <1> 	;mov	dx, 4D1h	; 8259 ELCR2
   466                              <1>     	;in	al, dx
   467                              <1> 	;mov	ah, al
   468                              <1> 	;;mov	dx, 4D0h 	; 8259 ELCR1
   469                              <1> 	;dec	dl
   470                              <1> 	;in	al, dx
   471                              <1> 	;bts	ax, cx
   472                              <1> 	;;mov	dx, 4D0h
   473                              <1> 	;out	dx, al		; set level-triggered mode
   474                              <1> 	;mov	al, ah ; 29/05/2017
   475                              <1> 	;;mov	dx, 4D1h
   476                              <1> 	;inc	dl
   477                              <1> 	;out	dx, al		; set level-triggered mode
   478                              <1> 
   479                              <1> 	;xor	eax, eax ; 0
   480                              <1> 
   481 00013B23 C3                  <1> 	retn
   482                              <1> 
   483                              <1> ; CODE for PCI
   484                              <1> 
   485                              <1> pciFindDevice:
   486                              <1> 	; 19/11/2023
   487                              <1> 	; 03/04/2017 ('pci.asm', 20/03/2017)
   488                              <1> 	;
   489                              <1> 	; scan through PCI space looking for a device+vendor ID
   490                              <1> 	;
   491                              <1> 	; Entry: EAX=Device+Vendor ID
   492                              <1> 	;
   493                              <1> 	; Exit: EAX=PCI address if device found
   494                              <1> 	;	EDX=Device+Vendor ID
   495                              <1> 	;       CY clear if found, set if not found. EAX invalid if CY set.
   496                              <1> 	;
   497                              <1> 	; Destroys: ebx, edi ; 19/11/2023
   498                              <1> 
   499                              <1> 	;push	ecx
   500                              <1> 	;push	eax ; * ; 19/11/2023
   501                              <1> 	;push	esi
   502                              <1> 	;push	edi
   503                              <1> 	;
   504                              <1> 	;mov	esi, eax		; save off vend+device ID
   505                              <1>         ; 19/11/2023
   506 00013B24 89C3                <1> 	mov	ebx, eax
   507                              <1> 	;mov	edi, (80000000h - 100h)	; start with bus 0, dev 0 func 0
   508 00013B26 BF00000080          <1> 	mov	edi, 80000000h
   509                              <1> nextPCIdevice:
   510                              <1> 	;add	edi, 100h
   511                              <1> 	;cmp	edi, 80FFF800h		; scanned all devices?
   512                              <1> 	;stc
   513                              <1> 	;je	short PCIScanExit	; not found
   514                              <1> 
   515 00013B2B 89F8                <1> 	mov 	eax, edi		; read PCI registers
   516 00013B2D E87D000000          <1> 	call	pciRegRead32
   517                              <1> 	; 19/11/2023
   518 00013B32 39DA                <1> 	cmp	edx, ebx
   519                              <1> 	;cmp	edx, esi		; found device?
   520                              <1> 	;jne	short nextPCIdevice
   521                              <1> 	;;clc
   522 00013B34 7412                <1> 	je	short PCIScanExit	; found
   523                              <1> 	; 19/11/2023
   524 00013B36 81FF00F8FF80        <1> 	cmp	edi, 80FFF800h
   525 00013B3C 7308                <1> 	jnb	short pfd_nf		; not found
   526 00013B3E 81C700010000        <1> 	add	edi, 100h
   527 00013B44 EBE5                <1> 	jmp	short nextPCIdevice
   528                              <1> pfd_nf:
   529 00013B46 F9                  <1> 	stc
   530 00013B47 C3                  <1> 	retn	
   531                              <1> PCIScanExit:
   532                              <1> 	;pushf
   533 00013B48 B8FFFFFF7F          <1> 	mov	eax, NOT_BIT31 	; 19/03/2017
   534 00013B4D 21F8                <1> 	and	eax, edi	; return only bus/dev/fn #
   535                              <1> 	;popf
   536                              <1> 	;
   537                              <1> 	;pop	edi
   538                              <1> 	;pop	esi
   539                              <1> 	;pop	edx ; * ; 19/11/2023
   540                              <1> 	;pop	ecx
   541                              <1> 	;
   542 00013B4F C3                  <1> 	retn
   543                              <1> 
   544                              <1> ; 26/11/2023
   545                              <1> %if 1
   546                              <1> 
   547                              <1> pciRegRead:
   548                              <1> 	; 03/04/2017 ('pci.asm', 20/03/2017)
   549                              <1> 	;
   550                              <1> 	; 8/16/32bit PCI reader
   551                              <1> 	;
   552                              <1> 	; Entry: EAX=PCI Bus/Device/fn/register number
   553                              <1> 	;           BIT30 set if 32 bit access requested
   554                              <1> 	;           BIT29 set if 16 bit access requested
   555                              <1> 	;           otherwise defaults to 8 bit read
   556                              <1> 	;
   557                              <1> 	; Exit:  DL,DX,EDX register data depending on requested read size
   558                              <1> 	;
   559                              <1> 	; Note1: this routine is meant to be called via pciRegRead8,
   560                              <1> 	;	 pciRegread16 or pciRegRead32, listed below.
   561                              <1> 	;
   562                              <1> 	; Note2: don't attempt to read 32 bits of data from a non dword
   563                              <1> 	;	 aligned reg number. Likewise, don't do 16 bit reads from
   564                              <1> 	;	 non word aligned reg #
   565                              <1> 	
   566 00013B50 53                  <1> 	push	ebx
   567 00013B51 51                  <1> 	push	ecx
   568 00013B52 89C3                <1>         mov     ebx, eax		; save eax, dh
   569 00013B54 88F1                <1>         mov     cl, dh
   570                              <1> 
   571 00013B56 25FFFFFF3F          <1>         and     eax, NOT_PCI32_PCI16	; clear out data size request
   572 00013B5B 0D00000080          <1>         or      eax, BIT31		; make a PCI access request
   573 00013B60 24FC                <1>         and     al, ~3 ; NOT 3		; force index to be dword
   574                              <1> 
   575 00013B62 66BAF80C            <1>         mov     dx, PCI_INDEX_PORT
   576 00013B66 EF                  <1>         out	dx, eax			; write PCI selector
   577                              <1> 	
   578 00013B67 66BAFC0C            <1>         mov     dx, PCI_DATA_PORT
   579 00013B6B 88D8                <1>         mov     al, bl
   580 00013B6D 2403                <1>         and     al, 3			; figure out which port to
   581 00013B6F 00C2                <1>         add     dl, al			; read to
   582                              <1> 
   583 00013B71 F7C3000000C0        <1> 	test    ebx, PCI32+PCI16
   584 00013B77 7507                <1>         jnz     short _pregr0
   585 00013B79 EC                  <1> 	in	al, dx			; return 8 bits of data
   586 00013B7A 88C2                <1>         mov	dl, al
   587 00013B7C 88CE                <1> 	mov     dh, cl			; restore dh for 8 bit read
   588 00013B7E EB12                <1> 	jmp	short _pregr2
   589                              <1> _pregr0:	
   590 00013B80 F7C300000080        <1> 	test    ebx, PCI32
   591 00013B86 7507                <1>         jnz	short _pregr1
   592 00013B88 66ED                <1> 	in	ax, dx
   593 00013B8A 6689C2              <1>         mov     dx, ax			; return 16 bits of data
   594 00013B8D EB03                <1> 	jmp	short _pregr2
   595                              <1> _pregr1:
   596 00013B8F ED                  <1> 	in	eax, dx			; return 32 bits of data
   597 00013B90 89C2                <1> 	mov	edx, eax
   598                              <1> _pregr2:
   599 00013B92 89D8                <1> 	mov     eax, ebx		; restore eax
   600 00013B94 25FFFFFF3F          <1>         and     eax, NOT_PCI32_PCI16	; clear out data size request
   601 00013B99 59                  <1> 	pop	ecx
   602 00013B9A 5B                  <1> 	pop	ebx
   603 00013B9B C3                  <1> 	retn
   604                              <1> 
   605                              <1> pciRegRead8:
   606 00013B9C 25FFFFFF3F          <1>         and     eax, NOT_PCI32_PCI16	; set up 8 bit read size
   607 00013BA1 EBAD                <1>         jmp     short pciRegRead	; call generic PCI access
   608                              <1> 
   609                              <1> pciRegRead16:
   610 00013BA3 25FFFFFF3F          <1>         and     eax, NOT_PCI32_PCI16	; set up 16 bit read size
   611 00013BA8 0D00000040          <1>         or      eax, PCI16		; call generic PCI access
   612 00013BAD EBA1                <1>         jmp     short pciRegRead
   613                              <1> 
   614                              <1> pciRegRead32:
   615 00013BAF 25FFFFFF3F          <1>         and     eax, NOT_PCI32_PCI16	; set up 32 bit read size
   616 00013BB4 0D00000080          <1>         or      eax, PCI32		; call generic PCI access
   617 00013BB9 EB95                <1>         jmp     pciRegRead
   618                              <1> 
   619                              <1> pciRegWrite:
   620                              <1> 	; 03/04/2017 ('pci.asm', 29/11/2016)
   621                              <1> 	;
   622                              <1> 	; 8/16/32bit PCI writer
   623                              <1> 	;
   624                              <1> 	; Entry: EAX=PCI Bus/Device/fn/register number
   625                              <1> 	;           BIT31 set if 32 bit access requested
   626                              <1> 	;           BIT30 set if 16 bit access requested
   627                              <1> 	;           otherwise defaults to 8bit read
   628                              <1> 	;        DL/DX/EDX data to write depending on size
   629                              <1> 	;
   630                              <1> 	; Note1: this routine is meant to be called via pciRegWrite8, 
   631                              <1> 	;	 pciRegWrite16 or pciRegWrite32 as detailed below.
   632                              <1> 	;
   633                              <1> 	; Note2: don't attempt to write 32bits of data from a non dword
   634                              <1> 	;	 aligned reg number. Likewise, don't do 16 bit writes from
   635                              <1> 	;	 non word aligned reg #
   636                              <1> 
   637 00013BBB 53                  <1> 	push	ebx
   638 00013BBC 51                  <1> 	push	ecx
   639 00013BBD 89C3                <1>         mov     ebx, eax		; save eax, edx
   640 00013BBF 89D1                <1>         mov     ecx, edx
   641 00013BC1 25FFFFFF3F          <1> 	and     eax, NOT_PCI32_PCI16	; clear out data size request
   642 00013BC6 0D00000080          <1>         or      eax, BIT31		; make a PCI access request
   643 00013BCB 24FC                <1>         and     al, ~3 ; NOT 3		; force index to be dword
   644                              <1> 
   645 00013BCD 66BAF80C            <1>         mov     dx, PCI_INDEX_PORT
   646 00013BD1 EF                  <1>         out	dx, eax			; write PCI selector
   647                              <1> 	
   648 00013BD2 66BAFC0C            <1>         mov     dx, PCI_DATA_PORT
   649 00013BD6 88D8                <1>         mov     al, bl
   650 00013BD8 2403                <1>         and     al, 3			; figure out which port to
   651 00013BDA 00C2                <1>         add     dl, al			; write to
   652                              <1> 
   653 00013BDC F7C3000000C0        <1> 	test    ebx, PCI32+PCI16
   654 00013BE2 7505                <1>         jnz     short _pregw0
   655 00013BE4 88C8                <1> 	mov	al, cl 			; put data into al
   656 00013BE6 EE                  <1> 	out	dx, al
   657 00013BE7 EB12                <1> 	jmp	short _pregw2
   658                              <1> _pregw0:
   659 00013BE9 F7C300000080        <1> 	test    ebx, PCI32
   660 00013BEF 7507                <1>         jnz     short _pregw1
   661 00013BF1 6689C8              <1> 	mov	ax, cx			; put data into ax
   662 00013BF4 66EF                <1> 	out	dx, ax
   663 00013BF6 EB03                <1> 	jmp	short _pregw2
   664                              <1> _pregw1:
   665 00013BF8 89C8                <1> 	mov	eax, ecx		; put data into eax 		
   666 00013BFA EF                  <1> 	out	dx, eax
   667                              <1> _pregw2:
   668 00013BFB 89D8                <1>         mov     eax, ebx		; restore eax
   669 00013BFD 25FFFFFF3F          <1>         and     eax, NOT_PCI32_PCI16	; clear out data size request
   670 00013C02 89CA                <1>         mov     edx, ecx		; restore dx
   671 00013C04 59                  <1> 	pop	ecx
   672 00013C05 5B                  <1> 	pop	ebx
   673 00013C06 C3                  <1> 	retn
   674                              <1> 
   675                              <1> pciRegWrite8:
   676 00013C07 25FFFFFF3F          <1>         and     eax, NOT_PCI32_PCI16	; set up 8 bit write size
   677 00013C0C EBAD                <1>         jmp	short pciRegWrite	; call generic PCI access
   678                              <1> 
   679                              <1> pciRegWrite16:
   680 00013C0E 25FFFFFF3F          <1>         and     eax, NOT_PCI32_PCI16	; set up 16 bit write size
   681 00013C13 0D00000040          <1>         or      eax, PCI16		; call generic PCI access
   682 00013C18 EBA1                <1>         jmp	short pciRegWrite
   683                              <1> 
   684                              <1> pciRegWrite32:
   685 00013C1A 25FFFFFF3F          <1>         and     eax, NOT_PCI32_PCI16	; set up 32 bit write size
   686 00013C1F 0D00000080          <1>         or      eax, PCI32		; call generic PCI access
   687 00013C24 EB95                <1>         jmp	pciRegWrite
   688                              <1> 
   689                              <1> %endif
   690                              <1> 
   691                              <1> ; 26/11/2023 - temporary
   692                              <1> %if 0
   693                              <1> 
   694                              <1> ; PLAYWAV3.COM, ac97_vra.asm, 19/11/2023, Erdogan Tan
   695                              <1> 
   696                              <1> ;===============================================================
   697                              <1> ; 8/16/32bit PCI reader
   698                              <1> ;
   699                              <1> ; Entry: EAX=PCI Bus/Device/fn/register number
   700                              <1> ;           BIT30 set if 32 bit access requested
   701                              <1> ;           BIT29 set if 16 bit access requested
   702                              <1> ;           otherwise defaults to 8 bit read
   703                              <1> ;
   704                              <1> ; Exit:  DL,DX,EDX register data depending on requested read size
   705                              <1> ;
   706                              <1> ; Note: this routine is meant to be called via pciRegRead8, pciRegread16,
   707                              <1> ;	or pciRegRead32, listed below.
   708                              <1> ;
   709                              <1> ; Note2: don't attempt to read 32bits of data from a non dword aligned reg
   710                              <1> ;	 number. Likewise, don't do 16bit reads from non word aligned reg #
   711                              <1> ; 
   712                              <1> pciRegRead:
   713                              <1> 	push	ebx
   714                              <1> 	push	ecx
   715                              <1>         mov     ebx, eax                        ; save eax, dh
   716                              <1>         mov     cl, dh
   717                              <1>         and     eax, (~PCI32)+PCI16             ; clear out data size request
   718                              <1>         or      eax, BIT31                      ; make a PCI access request
   719                              <1>         and     al, ~3 ; NOT 3                  ; force index to be dword
   720                              <1> 
   721                              <1>         mov     dx, PCI_INDEX_PORT
   722                              <1>         out     dx, eax                         ; write PCI selector
   723                              <1> 
   724                              <1>         mov     dx, PCI_DATA_PORT
   725                              <1>         mov     al, bl
   726                              <1>         and     al, 3                           ; figure out which port to
   727                              <1>         add     dl, al                          ; read to
   728                              <1> 
   729                              <1> 	in      eax, dx                         ; do 32bit read
   730                              <1>         test    ebx, PCI32
   731                              <1>         jz      short _pregr1
   732                              <1> 
   733                              <1>         mov     edx, eax                        ; return 32bits of data
   734                              <1> _pregr1:
   735                              <1> 	mov     dx, ax                          ; return 16bits of data
   736                              <1>         test    ebx, PCI32+PCI16
   737                              <1>         jnz     short _pregr2
   738                              <1>         mov     dh, cl                          ; restore dh for 8 bit read
   739                              <1> _pregr2:
   740                              <1>         mov     eax, ebx                        ; restore eax
   741                              <1>         and     eax, (~PCI32)+PCI16             ; clear out data size request
   742                              <1> 	pop	ecx
   743                              <1> 	pop	ebx
   744                              <1> 	retn
   745                              <1> 
   746                              <1> pciRegRead8:
   747                              <1>         and     eax, (~PCI16)+PCI32             ; set up 8 bit read size
   748                              <1>         jmp     short pciRegRead		; call generic PCI access
   749                              <1> 
   750                              <1> pciRegRead16:
   751                              <1>         and     eax, (~PCI16)+PCI32		; set up 16 bit read size
   752                              <1>         or      eax, PCI16			; call generic PCI access
   753                              <1>         jmp     short pciRegRead
   754                              <1> 
   755                              <1> pciRegRead32:
   756                              <1>         and     eax, (~PCI16)+PCI32		; set up 32 bit read size
   757                              <1>         or      eax, PCI32			; call generic PCI access
   758                              <1>         jmp     short pciRegRead
   759                              <1> 
   760                              <1> ;===============================================================
   761                              <1> ; 8/16/32bit PCI writer
   762                              <1> ;
   763                              <1> ; Entry: EAX=PCI Bus/Device/fn/register number
   764                              <1> ;           BIT31 set if 32 bit access requested
   765                              <1> ;           BIT30 set if 16 bit access requested
   766                              <1> ;           otherwise defaults to 8bit read
   767                              <1> ;        DL/DX/EDX data to write depending on size
   768                              <1> ;
   769                              <1> ;
   770                              <1> ; note: this routine is meant to be called via pciRegWrite8, pciRegWrite16,
   771                              <1> ; 	or pciRegWrite32 as detailed below.
   772                              <1> ;
   773                              <1> ; Note2: don't attempt to write 32bits of data from a non dword aligned reg
   774                              <1> ;	 number. Likewise, don't do 16bit writes from non word aligned reg #
   775                              <1> ;
   776                              <1> pciRegWrite:
   777                              <1> 	push	ebx
   778                              <1> 	push	ecx
   779                              <1>         mov     ebx, eax                        ; save eax, dx
   780                              <1>         mov     cx, dx
   781                              <1>         or      eax, BIT31                      ; make a PCI access request
   782                              <1>         and     eax, ~PCI16 ; NOT PCI16         ; clear out data size request
   783                              <1>         and     al, ~3 ; NOT 3                  ; force index to be dword
   784                              <1> 
   785                              <1>         mov     dx, PCI_INDEX_PORT
   786                              <1>         out     dx, eax                         ; write PCI selector
   787                              <1> 
   788                              <1>         mov     dx, PCI_DATA_PORT
   789                              <1>         mov     al, bl
   790                              <1>         and     al, 3                           ; figure out which port to
   791                              <1>         add     dl, al                          ; write to
   792                              <1> 
   793                              <1>         mov     eax, edx                        ; put data into eax
   794                              <1>         mov     ax, cx
   795                              <1> 
   796                              <1>         out     dx, al
   797                              <1>         test    ebx, PCI16+PCI32                ; only 8bit access? bail
   798                              <1>         jz      short _pregw1
   799                              <1> 
   800                              <1>         out     dx, ax                          ; write 16 bit value
   801                              <1>         test    ebx, PCI16                      ; 16bit requested?  bail
   802                              <1>         jnz     short _pregw1
   803                              <1> 
   804                              <1>         out     dx, eax                         ; write full 32bit
   805                              <1> _pregw1:
   806                              <1>         mov     eax, ebx                        ; restore eax
   807                              <1>         and     eax, (~PCI32)+PCI16             ; clear out data size request
   808                              <1>         mov     dx, cx                          ; restore dx
   809                              <1> 	pop	ecx
   810                              <1> 	pop	ebx
   811                              <1> 	ret
   812                              <1> 
   813                              <1> pciRegWrite8:
   814                              <1>         and     eax, (~PCI16)+PCI32		; set up 8 bit write size
   815                              <1>         jmp     short pciRegWrite		; call generic PCI access
   816                              <1> 
   817                              <1> pciRegWrite16:
   818                              <1>         and     eax, (~PCI16)+PCI32		; set up 16 bit write size
   819                              <1>         or      eax, PCI16			; call generic PCI access
   820                              <1>         jmp     short pciRegWrite
   821                              <1> 
   822                              <1> pciRegWrite32:
   823                              <1>         and     eax, (~PCI16)+PCI32		; set up 32 bit write size
   824                              <1>         or      eax, PCI32			; call generic PCI access
   825                              <1>         jmp     short pciRegWrite
   826                              <1> 
   827                              <1> ;===============================================================
   828                              <1> 
   829                              <1> %endif
   830                              <1> 
   831                              <1> init_codec:
   832                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
   833                              <1> 	; 05/06/2017
   834                              <1> 	; 28/05/2017 - Erdogan Tan (Ref: KolibriOS, vt823x.asm)
   835                              <1> 	;
   836 00013C26 A1[78890100]        <1> 	mov	eax, [audio_dev_id]	
   837 00013C2B B041                <1> 	mov	al, VIA_ACLINK_CTRL
   838 00013C2D E86AFFFFFF          <1> 	call	pciRegRead8
   839                              <1> 	; ?
   840 00013C32 B040                <1> 	mov	al, VIA_ACLINK_STAT
   841 00013C34 E863FFFFFF          <1> 	call	pciRegRead8
   842 00013C39 F6C201              <1> 	test	dl, VIA_ACLINK_C00_READY
   843 00013C3C 7508                <1>         jnz     short _codec_ready_1
   844 00013C3E E80D000000          <1> 	call	reset_codec
   845 00013C43 7305                <1> 	jnc	short _codec_ready_2 ; eax = 1
   846 00013C45 C3                  <1> 	retn
   847                              <1> _codec_ready_1:
   848                              <1> 	;mov	eax, 1
   849                              <1> 	; 06/08/2022
   850 00013C46 29C0                <1> 	sub	eax, eax
   851 00013C48 FEC0                <1> 	inc	al
   852                              <1> 	; eax = 1
   853                              <1> _codec_ready_2:
   854 00013C4A E880000000          <1> 	call	codec_io_w16
   855                              <1> detect_codec:
   856 00013C4F C3                  <1> 	retn
   857                              <1> 
   858                              <1> reset_codec:
   859                              <1> 	; 16/04/2017
   860                              <1> 	; 23/03/2017 
   861                              <1> 	; ('codec.asm')
   862                              <1> 	; 12/11/2016 - Erdogan Tan (Ref: KolibriOS, vt823x.asm)
   863 00013C50 A1[78890100]        <1> 	mov	eax, [audio_dev_id]
   864 00013C55 B041                <1>  	mov	al, VIA_ACLINK_CTRL
   865 00013C57 B2E0                <1>        	mov	dl, VIA_ACLINK_CTRL_ENABLE + VIA_ACLINK_CTRL_RESET + VIA_ACLINK_CTRL_SYNC
   866 00013C59 E8A9FFFFFF          <1> 	call	pciRegWrite8
   867                              <1> 
   868 00013C5E E843000000          <1> 	call	delay_100ms 	; wait 100 ms
   869                              <1> _rc_cold:
   870 00013C63 E811000000          <1>         call    cold_reset
   871 00013C68 7301                <1>         jnc     short _reset_codec_ok
   872                              <1> 	
   873                              <1> 	; 16/04/2017
   874                              <1>         ;xor	eax, eax	; timeout error
   875                              <1>        	;stc
   876 00013C6A C3                  <1> 	retn
   877                              <1> 
   878                              <1> _reset_codec_ok:
   879                              <1> 	; 01/09/2020
   880                              <1> 	; 15/08/2020
   881                              <1> 	; 27/07/2020
   882                              <1> 	; also reset codec by using index control register 0 of AD1980 or ALC655
   883                              <1> 	; (to fix line out -2 channels audio playing- problem on AD1980 codec)  
   884                              <1> 
   885 00013C6B 29C0                <1> 	sub	eax, eax
   886                              <1> 	; 02/11/2023
   887                              <1> 	;mov	edx, CODEC_RESET_REG ; 00h ; Reset register
   888 00013C6D 31D2                <1> 	xor	edx, edx ; 00h ; Reset register
   889 00013C6F E8BE000000          <1> 	call	codec_write
   890                              <1> 
   891                              <1> 	;sub	eax, eax
   892                              <1> 	; 01/09/2020
   893                              <1> 	; 15/08/2020
   894                              <1> 	; AD1980 BugFix
   895                              <1> 	; (set HPSEL -headphone amp to be driven from mixer- and
   896                              <1> 	;      CLDIS -center and LFE disable- bits)	
   897                              <1> 	;mov	eax, 0C00h ; HPSEL = bit 10, CLDIS = bit 11 ; 01/09/2020
   898                              <1>  	;mov	edx, CODEC_MISC_CRTL_BITS_REG ; 76h ; Misc Ctrl Bits ; AD1980
   899                              <1> 	;call	codec_write
   900                              <1> 
   901 00013C74 31C0                <1>         xor     eax, eax
   902                              <1>         ;mov	al, VIA_ACLINK_C00_READY ; 1
   903 00013C76 FEC0                <1>         inc	al
   904 00013C78 C3                  <1> 	retn
   905                              <1> 
   906                              <1> cold_reset:
   907                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
   908                              <1> 	; 16/04/2017
   909                              <1> 	; 23/03/2017
   910                              <1> 	; ('codec.asm')
   911                              <1> 	; 12/11/2016 - Erdogan Tan (Ref: KolibriOS, vt823x.asm)
   912                              <1> 	;mov	eax, [audio_dev_id]
   913                              <1> 	;mov	al, VIA_ACLINK_CTRL
   914 00013C79 30D2                <1> 	xor	dl, dl ; 0
   915 00013C7B E887FFFFFF          <1> 	call	pciRegWrite8
   916                              <1> 
   917 00013C80 E821000000          <1> 	call	delay_100ms	; wait 100 ms
   918                              <1> 
   919                              <1> 	;; ACLink on, deassert ACLink reset, VSR, SGD data out
   920                              <1>         ;; note - FM data out has trouble with non VRA codecs !!
   921                              <1>         
   922                              <1> 	;mov	eax, [audio_dev_id]
   923                              <1> 	;mov	al, VIA_ACLINK_CTRL
   924 00013C85 B2CC                <1> 	mov	dl, VIA_ACLINK_CTRL_INIT
   925 00013C87 E87BFFFFFF          <1> 	call	pciRegWrite8
   926                              <1> 
   927                              <1> 	;mov	ecx, 16	; total 2s
   928                              <1> 	; 06/08/2022
   929                              <1> 	;sub	ecx, ecx
   930                              <1> 	; 22/11/2023
   931                              <1> 	; ecx = 0 (from 'delay_100ms')
   932 00013C8C B110                <1> 	mov	cl, 16
   933                              <1> _crst_wait:
   934                              <1> 	;mov	eax, [audio_dev_id]
   935 00013C8E B040                <1> 	mov	al, VIA_ACLINK_STAT
   936 00013C90 E807FFFFFF          <1> 	call	pciRegRead8	
   937                              <1> 
   938 00013C95 F6C201              <1>         test    dl, VIA_ACLINK_C00_READY
   939 00013C98 750B                <1>         jnz     short _crst_ok
   940                              <1> 
   941 00013C9A 51                  <1> 	push	ecx
   942 00013C9B E806000000          <1> 	call	delay_100ms
   943 00013CA0 59                  <1> 	pop	ecx
   944                              <1> 
   945 00013CA1 49                  <1>         dec     ecx
   946 00013CA2 75EA                <1>         jnz     short _crst_wait
   947                              <1> 
   948                              <1> _crst_fail:
   949 00013CA4 F9                  <1>         stc
   950                              <1> _crst_ok:
   951 00013CA5 C3                  <1> 	retn
   952                              <1> 
   953                              <1> delay_100ms:
   954                              <1> 	; 29/05/2017
   955                              <1> 	; 24/03/2017 ('codec.asm')
   956                              <1> 	; wait 100 ms
   957 00013CA6 B990010000          <1> 	mov	ecx, 400  ; 400*0.25ms
   958                              <1> _delay_x_ms:
   959 00013CAB E803000000          <1> 	call	delay1_4ms
   960 00013CB0 E2F9                <1>         loop	_delay_x_ms
   961 00013CB2 C3                  <1> 	retn
   962                              <1> 
   963                              <1> ;       delay1_4ms - Delay for 1/4 millisecond.
   964                              <1> ;	    1ms = 1000us
   965                              <1> ;       Entry:
   966                              <1> ;         None
   967                              <1> ;       Exit:
   968                              <1> ;	  None
   969                              <1> ;
   970                              <1> ;       Modified:
   971                              <1> ;         None
   972                              <1> 
   973                              <1> 	; 29/05/2017
   974                              <1> 	; 23/04/2017
   975                              <1> 	; 05/03/2017 (TRDOS 386)
   976                              <1> 	; ('UTILS.ASM')
   977                              <1> delay1_4ms:
   978 00013CB3 50                  <1>         push    eax 
   979 00013CB4 51                  <1>         push    ecx
   980 00013CB5 B110                <1>         mov	cl, 16		; close enough.
   981                              <1> 
   982 00013CB7 E461                <1> 	in	al, PORTB ; 61h
   983                              <1> 		
   984 00013CB9 2410                <1> 	and	al, REFRESH_STATUS ; 10h
   985 00013CBB 88C5                <1> 	mov	ch, al		; Start toggle state
   986                              <1> _d4ms1:	
   987 00013CBD E461                <1> 	in	al, PORTB	; Read system control port
   988                              <1> 	
   989 00013CBF 2410                <1> 	and	al, REFRESH_STATUS ; Refresh toggles 15.085 microseconds
   990 00013CC1 38C5                <1> 	cmp	ch, al
   991 00013CC3 74F8                <1> 	je	short _d4ms1	; Wait for state change
   992                              <1> 
   993 00013CC5 88C5                <1> 	mov	ch, al		; Update with new state
   994 00013CC7 FEC9                <1> 	dec	cl
   995 00013CC9 75F2                <1> 	jnz	short _d4ms1
   996                              <1> 
   997 00013CCB F8                  <1> 	clc	; 29/05/2017
   998                              <1> 
   999 00013CCC 59                  <1>         pop     ecx
  1000 00013CCD 58                  <1>         pop     eax
  1001 00013CCE C3                  <1>         retn
  1002                              <1> 
  1003                              <1> ; 10/04/2017 (TRDOS 386)
  1004                              <1> ; 12/11/2016
  1005                              <1> 
  1006                              <1> codec_io_w16: ;w32
  1007                              <1> 	; ('codec.asm')
  1008 00013CCF 668B15[76890100]    <1>         mov	dx, [audio_io_base]
  1009 00013CD6 6681C28000          <1>         add     dx, VIA_REG_AC97
  1010 00013CDB EF                  <1> 	out	dx, eax
  1011 00013CDC C3                  <1>         retn
  1012                              <1> 
  1013                              <1> codec_io_r16: ;r32
  1014                              <1> 	; ('codec.asm')
  1015 00013CDD 668B15[76890100]    <1>         mov     dx, [audio_io_base]
  1016 00013CE4 6681C28000          <1>         add     dx, VIA_REG_AC97
  1017 00013CE9 ED                  <1>         in	eax, dx
  1018 00013CEA C3                  <1>         retn
  1019                              <1> 
  1020                              <1> ctrl_io_w8:
  1021                              <1> 	; ('codec.asm')
  1022 00013CEB 660315[76890100]    <1>         add     dx, [audio_io_base]
  1023 00013CF2 EE                  <1>         out	dx, al
  1024 00013CF3 C3                  <1>         retn
  1025                              <1> 
  1026                              <1> ctrl_io_r8:
  1027                              <1> 	; ('codec.asm')
  1028 00013CF4 660315[76890100]    <1>         add     dx, [audio_io_base]
  1029 00013CFB EC                  <1>         in	al, dx
  1030 00013CFC C3                  <1>         retn
  1031                              <1> 
  1032                              <1> ctrl_io_w32:
  1033                              <1> 	; ('codec.asm')
  1034 00013CFD 660315[76890100]    <1>         add     dx, [audio_io_base]
  1035 00013D04 EF                  <1>         out	dx, eax
  1036 00013D05 C3                  <1>         retn
  1037                              <1> 
  1038                              <1> ctrl_io_r32:
  1039                              <1> 	; ('codec.asm')
  1040 00013D06 660315[76890100]    <1>         add	dx, [audio_io_base]
  1041 00013D0D ED                  <1> 	in	eax, dx
  1042                              <1> _cr_not_rdy:	; 06/08/2022
  1043 00013D0E C3                  <1>         retn
  1044                              <1> 
  1045                              <1> codec_read:
  1046                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  1047                              <1> 	; 12/11/2016 - Erdogan Tan (Ref: KolibriOS, vt823x.asm)
  1048                              <1>         ; Use only primary codec.
  1049                              <1>         ; eax = register
  1050 00013D0F C1E010              <1>         shl     eax, VIA_REG_AC97_CMD_SHIFT
  1051 00013D12 0D00008002          <1>         or      eax, VIA_REG_AC97_PRIMARY_VALID + VIA_REG_AC97_READ
  1052                              <1> 
  1053 00013D17 E8B3FFFFFF          <1> 	call    codec_io_w16
  1054                              <1> 
  1055                              <1>       	; codec_valid
  1056 00013D1C E825000000          <1> 	call	codec_check_ready
  1057                              <1> 	;jnc	short _cr_ok
  1058                              <1> 	;retn
  1059                              <1> 	; 06/08/2022
  1060 00013D21 72EB                <1> 	jc	short _cr_not_rdy
  1061                              <1> 	; ecx <= 20
  1062                              <1> _cr_ok:
  1063                              <1> 	; wait 25 ms
  1064                              <1> 	;mov	ecx, 80 ; (100*0.25 ms)
  1065                              <1> 	; 06/08/2022
  1066                              <1> 	;xor	ecx, ecx
  1067 00013D23 B150                <1> 	mov	cl, 80
  1068                              <1> 	; ecx = 80
  1069                              <1> _cr_wloop:
  1070 00013D25 E889FFFFFF          <1> 	call	delay1_4ms
  1071 00013D2A E2F9                <1> 	loop	_cr_wloop
  1072                              <1> 
  1073 00013D2C E8ACFFFFFF          <1>         call    codec_io_r16
  1074                              <1> 	; 06/08/2022
  1075                              <1> 	;and	eax, 0FFFFh
  1076 00013D31 C3                  <1>         retn
  1077                              <1> 
  1078                              <1> codec_write:
  1079                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  1080                              <1> 	; 12/11/2016 - Erdogan Tan (Ref: KolibriOS, vt823x.asm)
  1081                              <1>         ; Use only primary codec.
  1082                              <1>         
  1083                              <1> 	; eax = data (volume)
  1084                              <1> 	; edx = register (mixer register)
  1085                              <1> 	
  1086 00013D32 C1E210              <1> 	shl     edx, VIA_REG_AC97_CMD_SHIFT
  1087                              <1> 
  1088                              <1> 	; 02/11/2023 (shl eax, 0)
  1089                              <1> 	;shl	eax, VIA_REG_AC97_DATA_SHIFT ; shl eax, 0
  1090 00013D35 09C2                <1>         or      edx, eax
  1091                              <1> 
  1092 00013D37 B800000000          <1>         mov     eax, VIA_REG_AC97_CODEC_ID_PRIMARY
  1093 00013D3C C1E01E              <1>         shl     eax, VIA_REG_AC97_CODEC_ID_SHIFT
  1094 00013D3F 09D0                <1>         or      eax, edx
  1095                              <1> 
  1096 00013D41 E889FFFFFF          <1>         call    codec_io_w16
  1097                              <1>         ;mov    [codec.regs+esi], ax
  1098                              <1> 
  1099                              <1>         ;call	codec_check_ready
  1100                              <1>        	;retn
  1101                              <1> 	;jmp	short _codec_check_ready	
  1102                              <1> 
  1103                              <1> codec_check_ready:
  1104                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  1105                              <1> 	; 12/11/2016 - Erdogan Tan (Ref: KolibriOS, vt823x.asm)
  1106                              <1> 
  1107                              <1> _codec_check_ready:
  1108                              <1> 	;mov	ecx, 20	; total 2s
  1109                              <1> 	; 06/08/2022
  1110 00013D46 29C9                <1> 	sub	ecx, ecx
  1111                              <1> 	;mov	cl, 20
  1112                              <1> 	; 02/11/2023
  1113 00013D48 B10A                <1> 	mov	cl, 10	; wait 1s
  1114                              <1> _ccr_wait:
  1115 00013D4A 51                  <1> 	push	ecx
  1116                              <1> 
  1117 00013D4B E88DFFFFFF          <1>         call    codec_io_r16
  1118 00013D50 A900000001          <1>         test    eax, VIA_REG_AC97_BUSY
  1119 00013D55 740B                <1>         jz      short _ccr_ok
  1120                              <1> 
  1121 00013D57 E84AFFFFFF          <1> 	call	delay_100ms
  1122                              <1> 
  1123 00013D5C 59                  <1> 	pop	ecx
  1124                              <1> 
  1125 00013D5D 49                  <1> 	dec     ecx
  1126 00013D5E 75EA                <1>         jnz     short _ccr_wait
  1127                              <1> 
  1128 00013D60 F9                  <1>         stc
  1129 00013D61 C3                  <1>         retn
  1130                              <1> 
  1131                              <1> _ccr_ok:
  1132 00013D62 59                  <1> 	pop	ecx
  1133 00013D63 25FFFF0000          <1> 	and     eax, 0FFFFh
  1134 00013D68 C3                  <1>         retn
  1135                              <1> 
  1136                              <1> codec_config:
  1137                              <1> 	; 02/11/2023 - TRDOS 386 Kernel v2.0.7
  1138                              <1> 	; 06/08/2022 - TRDOS 386 Kernel v2.0.5
  1139                              <1> 	; 10/06/2017
  1140                              <1> 	; 29/05/2017
  1141                              <1> 	; 24/04/2017
  1142                              <1> 	; 21/04/2017
  1143                              <1> 	; 16/04/2017 (TRDOS 386 Kernel) 
  1144                              <1> 	; 15/11/2016 ('codec.asm', 'player.com')
  1145                              <1> 	; 14/11/2016
  1146                              <1> 	; 12/11/2016 - Erdogan Tan
  1147                              <1> 	;	     (Ref: KolibriOS, 'setup_codec', codec.inc)
  1148                              <1> 
  1149 00013D69 B802020000          <1> 	mov     eax, 0202h
  1150 00013D6E 66A3[A8890100]      <1> 	mov	[audio_master_volume], ax
  1151                              <1> 
  1152                              <1> 	;mov	ax, 1F1Fh ; 31,31
  1153                              <1> 	; 02/11/2023
  1154 00013D74 66B80B0B            <1> 	mov	ax, 0B0Bh
  1155                              <1> 	;mov	edx, CODEC_MASTER_VOL_REG ; 02h ; Line Out
  1156                              <1> 	; 06/08/2022
  1157 00013D78 29D2                <1> 	sub	edx, edx
  1158 00013D7A B202                <1> 	mov	dl, CODEC_MASTER_VOL_REG ; 02h ; Line Out
  1159 00013D7C E8B1FFFFFF          <1> 	call	codec_write
  1160                              <1> 	;jc	short cconfig_error
  1161                              <1> 
  1162                              <1>  	;mov    eax, 0202h
  1163 00013D81 66B80202            <1> 	mov     ax, 0202h
  1164                              <1> 	;mov	edx, CODEC_PCM_OUT_REG ; 18h ; Wave Output (Stereo)
  1165                              <1> 	; 06/08/2022
  1166 00013D85 29D2                <1> 	sub	edx, edx
  1167 00013D87 B218                <1> 	mov	dl, CODEC_PCM_OUT_REG ; 18h ; Wave Output (Stereo)
  1168 00013D89 E8A4FFFFFF          <1> 	call	codec_write
  1169                              <1> 	;jc	short cconfig_error
  1170                              <1>       
  1171                              <1>  	;mov    eax, 0202h
  1172 00013D8E 66B80202            <1> 	mov	ax, 0202h
  1173                              <1> 	;mov	edx, CODEC_AUX_VOL ; 04h ; CODEC_HP_VOL_REG ; HeadPhone
  1174                              <1> 	; 06/08/2022
  1175 00013D92 29D2                <1> 	sub	edx, edx
  1176 00013D94 B204                <1> 	mov	dl, CODEC_AUX_VOL ; 04h ; CODEC_HP_VOL_REG ; HeadPhone
  1177 00013D96 E897FFFFFF          <1> 	call	codec_write
  1178                              <1> 	;jc	short cconfig_error
  1179                              <1> 
  1180                              <1>  	;mov    eax, 08h
  1181                              <1>         ;mov    ax, 08h
  1182 00013D9B 66B80880            <1> 	mov	ax, 8008h ; Mute
  1183                              <1> 	;mov	edx, 0Ch  ; AC97_PHONE_VOL ; TAD Input (Mono)
  1184                              <1> 	; 06/08/2022
  1185 00013D9F 29D2                <1> 	sub	edx, edx
  1186 00013DA1 B20C                <1> 	mov	dl, 0Ch	  ; AC97_PHONE_VOL ; TAD Input (Mono)
  1187 00013DA3 E88AFFFFFF          <1> 	call	codec_write
  1188                              <1> 	;jc	short cconfig_error
  1189                              <1> 
  1190                              <1>  	;mov    eax, 0808h
  1191 00013DA8 66B80808            <1> 	mov	ax, 0808h
  1192                              <1> 	;mov	edx, CODEC_LINE_IN_VOL_REG ; 10h ; Line Input (Stereo)	
  1193                              <1> 	; 06/08/2022
  1194 00013DAC 29D2                <1> 	sub	edx, edx
  1195 00013DAE B210                <1> 	mov	dl, CODEC_LINE_IN_VOL_REG ; 10h ; Line Input (Stereo)	
  1196 00013DB0 E87DFFFFFF          <1> 	call	codec_write
  1197                              <1> 	;jc	short cconfig_error
  1198                              <1> 
  1199                              <1>  	;mov    eax, 0808h
  1200 00013DB5 66B80808            <1> 	mov	ax, 0808h
  1201                              <1> 	;mov	edx, CODEC_CD_VOL_REG ; 12h ; CR Input (Stereo)
  1202                              <1> 	; 06/08/2022
  1203 00013DB9 29D2                <1> 	sub	edx, edx ; 02/11/2023
  1204 00013DBB B212                <1> 	mov	dl, CODEC_CD_VOL_REG ; 12h ; CR Input (Stereo)
  1205 00013DBD E870FFFFFF          <1> 	call	codec_write
  1206                              <1> 	;jc	short cconfig_error
  1207                              <1> 
  1208                              <1>  	;mov    eax, 0808h
  1209 00013DC2 66B80808            <1> 	mov     ax, 0808h
  1210                              <1>         ;mov	edx, CODEC_AUX_VOL_REG ; 16h ; Aux Input (Stereo)
  1211                              <1> 	; 06/08/2022
  1212 00013DC6 29D2                <1> 	sub	edx, edx
  1213 00013DC8 B216                <1> 	mov	dl, CODEC_AUX_VOL_REG ; 16h ; Aux Input (Stereo)
  1214                              <1> 	;call	codec_write
  1215                              <1> 	;;jc	short cconfig_error
  1216 00013DCA E963FFFFFF          <1> 	jmp	codec_write ; 10/06/2017
  1217                              <1> 
  1218                              <1> ;	; Extended Audio Status (2Ah)
  1219                              <1> ;	mov	eax, CODEC_EXT_AUDIO_CTRL_REG ; 2Ah 
  1220                              <1> ;	call	codec_read
  1221                              <1> ;	and     eax, 0FFFFh - 2		; clear DRA (BIT1)
  1222                              <1> ;	;or     eax, 1			; set VRA (BIT0)
  1223                              <1> ;	or	eax, 5  	; VRA (BIT0) & S/PDIF (BIT2) ; 14/11/2016
  1224                              <1> ;	mov	edx, CODEC_EXT_AUDIO_CTRL_REG
  1225                              <1> ;	call	codec_write
  1226                              <1> ;	;jc	short cconfig_error
  1227                              <1> ;
  1228                              <1> ;set_sample_rate:
  1229                              <1> ;	;movzx	eax, word [audio_freq]
  1230                              <1> ;	mov	ax, [audio_freq]
  1231                              <1> ;	mov	edx, CODEC_PCM_FRONT_DACRATE_REG ; 2Ch ; PCM Front DAC Rate
  1232                              <1> ;	;call	codec_write
  1233                              <1> ;	;retn
  1234                              <1> ;	jmp	codec_write
  1235                              <1> 	
  1236                              <1> ;cconfig_error:
  1237                              <1> ;	retn
  1238                              <1> 
  1239                              <1> vt8233_int_handler:
  1240                              <1> 	; 27/07/2020
  1241                              <1> 	; 22/07/2020
  1242                              <1> 	; Interrupt Handler for VIA VT8237R Audio Controller
  1243                              <1> 	; Note: called by 'dev_IRQ_service'
  1244                              <1> 	; 14/10/2017 
  1245                              <1> 	; 09/10/2017, 10/10/2017, 12/10/2017
  1246                              <1> 	; 13/06/2017
  1247                              <1> 	; 21/04/2017 (TRDOS 386 kernel, 'audio.s')
  1248                              <1> 	; 24/03/2017 - 'PLAYER.COM' ('player.asm') 
  1249                              <1> 
  1250                              <1> 	;push	eax ; * must be saved !
  1251                              <1> 	;push	edx
  1252                              <1> 	;push	ecx
  1253                              <1> 	;push	ebx ; * must be saved !
  1254                              <1> 	;push	esi
  1255                              <1> 	;push	edi
  1256                              <1> 
  1257                              <1> 	;cmp	byte [audio_busy], 1
  1258                              <1> 	;jnb	short _ih0 ; 09/10/2017
  1259                              <1> 
  1260                              <1> 	;mov	byte [audio_flag_eol], 0
  1261                              <1> 
  1262 00013DCF 66BA0000            <1>         mov     dx, VIADEV_PLAYBACK + VIA_REG_OFFSET_STATUS
  1263 00013DD3 E81CFFFFFF          <1>         call    ctrl_io_r8
  1264                              <1> 
  1265 00013DD8 A880                <1> 	test    al, VIA_REG_STAT_ACTIVE
  1266 00013DDA 7417                <1>         jz      short _ih0 ; 09/10/2017
  1267                              <1> 
  1268 00013DDC 2407                <1>         and     al, VIA_REG_STAT_EOL + VIA_REG_STAT_FLAG + VIA_REG_STAT_STOPPED
  1269 00013DDE A2[A7890100]        <1> 	mov	[audio_flag_eol], al
  1270 00013DE3 740E                <1>         jz	short _ih0 ; 09/10/2017
  1271                              <1> 
  1272                              <1> 	; 09/10/2017
  1273                              <1> 	;mov	byte [audio_busy], 1
  1274                              <1> 
  1275 00013DE5 803D[A6890100]01    <1> 	cmp	byte [audio_play_cmd], 1
  1276 00013DEC 7315                <1> 	jnb	short _ih1 ; 10/10/2017
  1277                              <1> 
  1278 00013DEE E84A000000          <1> 	call	channel_reset
  1279                              <1> _ih0:
  1280                              <1> 	; 09/10/2017
  1281 00013DF3 A0[A7890100]        <1>         mov     al, [audio_flag_eol]   ;; ack ;;
  1282 00013DF8 66BA0000            <1>         mov     dx, VIADEV_PLAYBACK + VIA_REG_OFFSET_STATUS
  1283 00013DFC E8EAFEFFFF          <1>         call    ctrl_io_w8
  1284 00013E01 EB39                <1> 	jmp	short _ih4
  1285                              <1> _ih1:
  1286                              <1> vt8233_tuneLoop:
  1287 00013E03 A0[A7890100]        <1>         mov     al, [audio_flag_eol]   ;; ack ;;
  1288 00013E08 66BA0000            <1>         mov     dx, VIADEV_PLAYBACK + VIA_REG_OFFSET_STATUS
  1289 00013E0C E8DAFEFFFF          <1>         call    ctrl_io_w8
  1290                              <1> 
  1291                              <1> 	; 22/07/2020
  1292                              <1> 	;; 12/10/2017
  1293                              <1> 	;mov	byte [audio_flag], 0 ; Reset	
  1294                              <1> 
  1295                              <1> 	; 10/10/2017
  1296                              <1> 	; 09/10/2017
  1297                              <1> 	;test	byte [audio_flag_eol], VIA_REG_STAT_FLAG
  1298                              <1> 	;jz	short _ih2 ; EOL
  1299                              <1> 
  1300                              <1> 	; 22/07/2020
  1301                              <1> 	; 14/10/2017
  1302                              <1> 	;test	byte [audio_flag_eol], VIA_REG_STAT_EOL
  1303                              <1> 	;jnz	short _ih2 ; EOL
  1304                              <1> 	;		   ; (Half Buffer 2 has been completed 
  1305                              <1> 	;		   ; and Half Buffer 1 will be played.)
  1306                              <1> 	
  1307                              <1> 	; FLAG  
  1308                              <1> 	; (Half Buffer 1 has been completed 
  1309                              <1> 	;  and Half Buffer 2 will be played.)
  1310                              <1> 
  1311                              <1> 	; 14/10/2017
  1312                              <1> 	;; (Continue to play.)
  1313                              <1> 	;mov	al, VIA_REG_CTRL_INT
  1314                              <1>        	;or	al, VIA_REG_CTRL_START
  1315                              <1>        	;mov	dx, VIADEV_PLAYBACK + VIA_REG_OFFSET_CONTROL
  1316                              <1>         ;call	ctrl_io_w8
  1317                              <1> 	; 12/10/2017
  1318                              <1> 	;mov	byte [audio_flag], 1 
  1319                              <1> 
  1320                              <1> 	; 22/07/2020
  1321                              <1> 	;inc	byte [audio_flag] ; = 1
  1322                              <1> _ih2: 
  1323                              <1> 	; 10/10/2017
  1324 00013E11 8B3D[90890100]      <1> 	mov	edi, [audio_dma_buff]
  1325 00013E17 8B0D[94890100]      <1> 	mov	ecx, [audio_dmabuff_size]
  1326 00013E1D D1E9                <1> 	shr	ecx, 1 ; dma buff size / 2 = half buffer size
  1327                              <1> 	
  1328                              <1> 	; 22/07/2020
  1329                              <1> 	; 12/10/2017
  1330                              <1> 	;cmp	byte [audio_flag], 0
  1331                              <1> 	;ja	short _ih3 ; Playing Half Buffer 2 (Current: FLAG)
  1332                              <1> 	
  1333                              <1> 	; 27/07/2020
  1334                              <1> 	; 22/07/2020
  1335 00013E1F F605[98890100]01    <1> 	test	byte [audio_flag], 1  ; Current flag value
  1336 00013E26 7402                <1> 	jz	short _ih3 ; Half Buffer 1 must be filled
  1337                              <1> 
  1338                              <1> 	; Half Buffer 2 must be filled
  1339 00013E28 01CF                <1> 	add	edi, ecx
  1340                              <1> _ih3:
  1341                              <1> 	; Update half buffer 2 while playing half buffer 1
  1342                              <1> 	; Update half buffer 1 while playing half buffer 2
  1343                              <1> 
  1344 00013E2A 8B35[88890100]      <1> 	mov	esi, [audio_p_buffer] ; phy addr of audio buff
  1345 00013E30 C1E902              <1> 	shr	ecx, 2 ; half buff size / 4
  1346 00013E33 F3A5                <1> 	rep	movsd
  1347                              <1> 
  1348                              <1> 	; switch flag value ;
  1349 00013E35 8035[98890100]01    <1> 	xor	byte [audio_flag], 1
  1350                              <1> 	; 12/10/2017
  1351                              <1> 	; [audio_flag] = 0 : Playing dma half buffer 2
  1352                              <1> 			   ; Next buffer (to update) is dma half buff 1
  1353                              <1> 	; 	       = 1 : Playing dma half buffer 1
  1354                              <1> 			   ; Next buffer (to update) is dma half buff 2
  1355                              <1> _ih4:	
  1356                              <1> 	; 28/05/2017
  1357                              <1> 	;mov	byte [audio_busy], 0 ; 09/10/2017
  1358                              <1> 	;
  1359                              <1> 	;pop	edi
  1360                              <1> 	;pop	esi
  1361                              <1> 	;pop	ebx ; * must be restored !
  1362                              <1> 	;pop	ecx
  1363                              <1> 	;pop	edx
  1364                              <1> 	;pop	eax ; * must be restored !
  1365                              <1> 
  1366 00013E3C C3                  <1> 	retn
  1367                              <1> 
  1368                              <1> channel_reset:
  1369                              <1> 	; 06/08/2022 - TRDOS 386 Kernel v2.0.5
  1370                              <1> 	; 24/06/2017
  1371                              <1> 	; 29/05/2017
  1372                              <1> 	; 23/03/2017
  1373                              <1> 	; 14/11/2016 - Erdogan Tan
  1374                              <1> 	; 12/11/2016 - Erdogan Tan (Ref: KolibriOS, vt823x.asm)
  1375                              <1>         ;mov	edx, VIA_REG_OFFSET_CONTROL
  1376                              <1> 	; 06/08/2022
  1377 00013E3D 29D2                <1> 	sub	edx, edx
  1378 00013E3F B201                <1> 	mov	dl, VIA_REG_OFFSET_CONTROL 
  1379                              <1> 	;mov	eax, VIA_REG_CTRL_PAUSE + VIA_REG_CTRL_TERMINATE + VIA_REG_CTRL_RESET
  1380 00013E41 B848000000          <1>         mov	eax, VIA_REG_CTRL_PAUSE + VIA_REG_CTRL_TERMINATE ; 24/06/2017       
  1381 00013E46 E8A0FEFFFF          <1> 	call    ctrl_io_w8
  1382                              <1> 
  1383                              <1>         ;mov	edx, VIA_REG_OFFSET_CONTROL
  1384                              <1>         ;call   ctrl_io_r8
  1385                              <1> 
  1386                              <1> 	; wait for 50 ms
  1387                              <1> 	;mov	ecx, 160 ; (200*0.25 ms) ; 29/05/2017	
  1388                              <1> 	; 06/08/2022
  1389 00013E4B 31C9                <1> 	xor	ecx, ecx
  1390 00013E4D B1A0                <1> 	mov	cl, 160
  1391                              <1> _ch_rst_wait:
  1392 00013E4F E85FFEFFFF          <1> 	call	delay1_4ms
  1393 00013E54 49                  <1> 	dec	ecx
  1394 00013E55 75F8                <1> 	jnz	short _ch_rst_wait     
  1395                              <1> 
  1396                              <1>         ; disable interrupts
  1397                              <1> 	;mov	edx, VIA_REG_OFFSET_CONTROL
  1398                              <1>         ; 06/08/2022
  1399 00013E57 29D2                <1> 	sub	edx, edx
  1400 00013E59 B201                <1> 	mov	dl, VIA_REG_OFFSET_CONTROL
  1401 00013E5B 31C0                <1>  	xor     eax, eax
  1402 00013E5D E889FEFFFF          <1>         call    ctrl_io_w8
  1403                              <1> 
  1404                              <1>         ; clear interrupts
  1405                              <1>         ;mov	edx, VIA_REG_OFFSET_STATUS
  1406                              <1> 	; 06/08/2022
  1407 00013E62 29D2                <1> 	sub	edx, edx
  1408                              <1> 	;mov	dl, VIA_REG_OFFSET_STATUS ; 0
  1409                              <1> 	; edx = 0
  1410                              <1> 	;mov	eax, 3
  1411                              <1>         ; 06/08/2022
  1412 00013E64 29C0                <1> 	sub	eax, eax
  1413 00013E66 B003                <1> 	mov	al, 3
  1414                              <1> 	; eax = 3
  1415 00013E68 E87EFEFFFF          <1> 	call	ctrl_io_w8
  1416                              <1> 
  1417                              <1> 	;mov	edx, VIA_REG_OFFSET_CURR_PTR
  1418                              <1> 	;xor	eax, eax
  1419                              <1> 	;call	ctrl_io_w32
  1420                              <1> 
  1421 00013E6D C3                  <1>         retn	
  1422                              <1> 
  1423                              <1> vt8233_stop: ; 22/04/2017
  1424 00013E6E C605[A6890100]00    <1> 	mov	byte [audio_play_cmd], 0 ; stop !
  1425                              <1> _tlp2:
  1426                              <1> 	; 24/06/2017
  1427                              <1>         ; finished with song, stop everything
  1428                              <1> 	;mov	al, VIA_REG_CTRL_INT
  1429                              <1>         ;or	al, VIA_REG_CTRL_TERMINATE
  1430                              <1> 	;mov	dx, VIADEV_PLAYBACK + VIA_REG_OFFSET_CONTROL
  1431                              <1>         ;call	ctrl_io_w8
  1432                              <1> 
  1433                              <1>         ;call	channel_reset
  1434                              <1> 	;retn
  1435                              <1> 
  1436 00013E75 EBC6                <1> 	jmp	short channel_reset
  1437                              <1> 
  1438                              <1> set_vt8233_bdl: ; Set VT8237R Buffer Descriptor List
  1439                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  1440                              <1> 	; 22/07/2020 - TRDOS 386 v2.0.2
  1441                              <1> 	; 28/05/2017
  1442                              <1> 	; 21/04/2017 (TRDOS 386 kernel, 'audio.s')
  1443                              <1> 	; 24/03/2017 - 'PLAYER.COM' ('via_wav.asm' - 29/11/2016) 
  1444                              <1> 	
  1445                              <1> 	; eax = dma buffer address = [audio_DMA_buff]
  1446                              <1> 	; ecx = dma buffer buffer size = [audio_dmabuff_size]
  1447                              <1> 
  1448 00013E77 D1E9                <1> 	shr	ecx, 1 ; dma half buffer size
  1449 00013E79 89CE                <1> 	mov	esi, ecx
  1450                              <1> 
  1451 00013E7B BF[AC890100]        <1>         mov     edi, audio_bdl_buff	; get BDL address
  1452                              <1> 	;mov	ecx, 32 / 2		; make 32 entries in BDL
  1453                              <1> 	; 06/08/2022
  1454 00013E80 29C9                <1> 	sub	ecx, ecx
  1455 00013E82 B110                <1> 	mov	cl, 16
  1456                              <1> 
  1457 00013E84 EB05                <1> 	jmp	short s_vt8233_bdl1 
  1458                              <1> 
  1459                              <1> s_vt8233_bdl0:
  1460                              <1> 	; set buffer descriptor 0 to start of data file in memory
  1461                              <1> 
  1462 00013E86 A1[90890100]        <1>  	mov	eax, [audio_dma_buff]	; Physical address of DMA buffer
  1463                              <1>  
  1464                              <1> s_vt8233_bdl1:
  1465 00013E8B AB                  <1> 	stosd				; store dmabuffer1 address
  1466                              <1> 
  1467 00013E8C 89C2                <1> 	mov	edx, eax
  1468                              <1> 
  1469                              <1> ; VIA VT8235.PDF: (Page 110) (Erdogan Tan, 29/11/2016)
  1470                              <1> 	;
  1471                              <1> 	; 	Audio SGD Table Format
  1472                              <1> 	;	-------------------------------
  1473                              <1> 	;	63   62    61-56    55-32  31-0
  1474                              <1> 	;	--   --   --------  -----  ----
  1475                              <1> 	;	EOL FLAG -reserved- Base   Base
  1476                              <1> 	;		    	    Count  Address
  1477                              <1> 	;		            [23:0] [31:0]
  1478                              <1> 	;	EOL: End Of Link. 
  1479                              <1> 	;	     1 indicates this block is the last of the link.
  1480                              <1> 	;	     If the channel Interrupt on EOL bit is set, then
  1481                              <1> 	;	     an interrupt is generated at the end of the transfer.
  1482                              <1> 	;
  1483                              <1> 	;	FLAG: Block Flag. If set, transfer pauses at the end of this
  1484                              <1> 	;	      block. If the channel Interrupt on FLAG bit is set,
  1485                              <1> 	;	      then an interrupt is generated at the end of this block.
  1486                              <1> 
  1487 00013E8E 89F0                <1> 	mov	eax, esi ; DMA half buffer size
  1488 00013E90 01C2                <1> 	add	edx, eax
  1489 00013E92 0D00000040          <1> 	or	eax, FLAG
  1490                              <1> 	;or	eax, EOL
  1491 00013E97 AB                  <1> 	stosd
  1492                              <1> 
  1493                              <1> ; 2nd buffer:
  1494                              <1> 
  1495 00013E98 89D0                <1>         mov	eax, edx ; Physical address of the 2nd half of DMA buffer	
  1496 00013E9A AB                  <1> 	stosd		 ; store dmabuffer2 address
  1497                              <1> 
  1498                              <1> ; set length to [audio_dmabuff_size]/2
  1499                              <1> ; Set control (bits 31:16) to BUP, bits 15:0=number of samples
  1500                              <1> ; 
  1501 00013E9B 89F0                <1> 	mov	eax, esi ; DMA half buffer size
  1502                              <1> 	; 22/07/2020
  1503                              <1> 	;or	eax, EOL
  1504 00013E9D 0D00000040          <1> 	or	eax, FLAG
  1505 00013EA2 AB                  <1> 	stosd
  1506                              <1> 
  1507 00013EA3 E2E1                <1> 	loop    s_vt8233_bdl0
  1508                              <1> 
  1509                              <1> 	; 22/07/2020
  1510 00013EA5 814FFC00000080      <1> 	or	dword [edi-4], EOL
  1511                              <1> 	
  1512 00013EAC C3                  <1> 	retn
  1513                              <1> 
  1514                              <1> vt8233_start_play:
  1515                              <1> 	; 06/08/2022 - TRDOS 386 Kernel v2.0.5
  1516                              <1> 	; 01/09/2020 
  1517                              <1> 	; 22/07/2020 
  1518                              <1> 	; start to play audio data via VT8233 audio controller
  1519                              <1> 	; 13/06/2017
  1520                              <1> 	; 10/06/2017
  1521                              <1> 	; 24/04/2017 
  1522                              <1> 	; 21/04/2017 (TRDOS 386 kernel, 'audio.s')
  1523                              <1> 	; 24/03/2017 - 'PLAYER.COM' ('via_wav.asm' - 29/11/2016) 
  1524                              <1> 	; write buffer descriptor list address
  1525                              <1> 
  1526                              <1> 	; Extended Audio Status (2Ah)
  1527 00013EAD B82A000000          <1> 	mov	eax, CODEC_EXT_AUDIO_CTRL_REG ; 2Ah 
  1528 00013EB2 E858FEFFFF          <1> 	call	codec_read
  1529 00013EB7 25FDFF0000          <1> 	and     eax, 0FFFFh - 2		; clear DRA (BIT1)
  1530                              <1> 	;or     eax, 1			; set VRA (BIT0)
  1531                              <1> 	;or	eax, 5  	; VRA (BIT0) & S/PDIF (BIT2) ; 14/11/2016
  1532 00013EBC 0C05                <1> 	or	al, 5
  1533                              <1> 	; 01/09/2020	
  1534                              <1> 	;or	eax, 3805h ; AD1980 (PRK, PRJ, PRI = 1 .. only front DAC)
  1535                              <1> 	; 01/09/2020
  1536                              <1> 	;mov	edx, CODEC_EXT_AUDIO_CTRL_REG
  1537                              <1> 	;cmp	word [audio_freq], 0BB80h ; 48 kHz
  1538                              <1> 	;jne	short set_extd_audio_status_1
  1539                              <1> 	;and	al, 0FEh ; disable VRA bit (set sample rate to 48000 Hz)
  1540                              <1> 	;jmp	short set_extd_audio_status_2
  1541                              <1> ;set_extd_audio_status_1:
  1542 00013EBE BA2A000000          <1> 	mov	edx, CODEC_EXT_AUDIO_CTRL_REG
  1543 00013EC3 E86AFEFFFF          <1> 	call	codec_write
  1544                              <1> 	;jc	short cconfig_error
  1545                              <1> 
  1546                              <1> set_sample_rate:
  1547                              <1> 	;movzx	eax, word [audio_freq]
  1548 00013EC8 66A1[A2890100]      <1> 	mov	ax, [audio_freq]
  1549 00013ECE BA2C000000          <1> 	mov	edx, CODEC_PCM_FRONT_DACRATE_REG ; 2Ch ; PCM Front DAC Rate
  1550                              <1> ;set_extd_audio_status_2:
  1551 00013ED3 E85AFEFFFF          <1> 	call	codec_write
  1552                              <1> 
  1553                              <1> 	; 01/09/2020
  1554                              <1> 	; set AD1980 MCB register (Index 76h) to 0C00h
  1555                              <1> 	; (CLDIS, HPSEL)
  1556                              <1> 	;mov	ax, 0C00h
  1557                              <1> 	;mov	edx, CODEC_MISC_CRTL_BITS_REG ; 76h 
  1558                              <1> 	;			; Miscellaneous Control Bit Register
  1559                              <1> 	;call	codec_write
  1560                              <1> 	;
  1561                              <1> 
  1562 00013ED8 B8[AC890100]        <1>         mov	eax, audio_bdl_buff
  1563                              <1>   
  1564                              <1> 	; 12/11/2016 - Erdogan Tan 
  1565                              <1> 	; (Ref: KolibriOS, vt823x.asm, 'create_primary_buff')
  1566                              <1> 	;mov	edx, VIADEV_PLAYBACK + VIA_REG_OFFSET_TABLE_PTR
  1567                              <1>         ; 06/08/2022
  1568 00013EDD 29D2                <1> 	sub	edx, edx
  1569                              <1> 	;mov	dl, VIADEV_PLAYBACK + VIA_REG_OFFSET_TABLE_PTR
  1570                              <1> 	; edx = 0
  1571 00013EDF E819FEFFFF          <1> 	call	ctrl_io_w32
  1572                              <1> 
  1573                              <1> 	;call	codec_check_ready
  1574                              <1> 
  1575 00013EE4 66BA0200            <1>   	mov	dx, VIADEV_PLAYBACK + VIA_REG_OFS_PLAYBACK_VOLUME_L
  1576                              <1>         ;mov	eax, 2	; 31
  1577 00013EE8 B01F                <1> 	mov	al, 31
  1578 00013EEA 2A05[A8890100]      <1>         sub	al, [audio_master_volume_l]
  1579 00013EF0 E8F6FDFFFF          <1> 	call	ctrl_io_w8
  1580                              <1> 
  1581                              <1> 	;call	codec_check_ready
  1582                              <1> 
  1583 00013EF5 66BA0300            <1>         mov     dx, VIADEV_PLAYBACK + VIA_REG_OFS_PLAYBACK_VOLUME_R
  1584                              <1>         ;mov	ax, 2	; 31
  1585 00013EF9 B01F                <1> 	mov	al, 31
  1586 00013EFB 2A05[A9890100]      <1>         sub	al, [audio_master_volume_r]
  1587 00013F01 E8E5FDFFFF          <1> 	call    ctrl_io_w8
  1588                              <1> 
  1589                              <1> 	;call	codec_check_ready
  1590                              <1> ;
  1591                              <1> ;
  1592                              <1> ; All set. Let's play some music.
  1593                              <1> ;
  1594                              <1> ;
  1595                              <1>        	;mov    dx, VIADEV_PLAYBACK + VIA_REG_OFFSET_STOP_IDX
  1596                              <1>         ;mov    ax, VIA8233_REG_TYPE_16BIT or VIA8233_REG_TYPE_STEREO or 0xfffff or 0xff000000
  1597                              <1>         ;call   ctrl_io_w32
  1598                              <1> 
  1599                              <1> 	;call	codec_check_ready
  1600                              <1> 
  1601                              <1> 	; 08/12/2016
  1602                              <1> 	; 07/10/2016
  1603                              <1>         ;;mov    al, 1
  1604                              <1>         ;mov	al, 31
  1605                              <1> 	; 22/07/2020
  1606 00013F06 B0FF                <1> 	mov	al, 0FFh
  1607 00013F08 E813000000          <1> 	call    set_VT8233_LastValidIndex
  1608                              <1> 
  1609 00013F0D C605[A6890100]01    <1> 	mov	byte [audio_play_cmd], 1 ; play command (do not stop) !
  1610                              <1> 
  1611                              <1> 	; 22/07/2020
  1612                              <1> 	;mov	byte [audio_flag], 0  ; clear half buffer flag
  1613                              <1> 
  1614                              <1> vt8233_play: ; continue to play
  1615                              <1> 	; 22/04/2017
  1616                              <1> 	;mov	al, VIA_REG_CTRL_INT
  1617                              <1>        	;or	al, VIA_REG_CTRL_START
  1618                              <1>         ;;mov	al, VIA_REG_CTRL_AUTOSTART + VIA_REG_CTRL_START
  1619                              <1> 	; 22/07/2020	
  1620 00013F14 B0A1                <1> 	mov	al, VIA_REG_CTRL_AUTOSTART + VIA_REG_CTRL_START + VIA_REG_CTRL_INT_FLAG
  1621                              <1> 
  1622 00013F16 66BA0100            <1> 	mov     dx, VIADEV_PLAYBACK + VIA_REG_OFFSET_CONTROL
  1623 00013F1A E8CCFDFFFF          <1>         call    ctrl_io_w8
  1624                              <1> 	;call	codec_check_ready
  1625                              <1> 	;retn
  1626                              <1> 	;jmp	codec_check_ready
  1627 00013F1F C3                  <1> 	retn
  1628                              <1> 
  1629                              <1> ;input AL = index # to stop on
  1630                              <1> set_VT8233_LastValidIndex:
  1631                              <1> 	; 06/08/2022 - TRDOS 386 Kernel v2.0.5
  1632                              <1> 	; 23/07/2020
  1633                              <1> 	; 10/06/2017
  1634                              <1> 	; 21/04/2017 (TRDOS 386 kernel, 'audio.s')
  1635                              <1> 	; 24/03/2017 - 'PLAYER.COM' ('via_wav.asm' - 29/11/2016) 
  1636                              <1> 	; 19/11/2016
  1637                              <1> 	; 14/11/2016 - Erdogan Tan (Ref: VIA VT8235.PDF, Page 110)
  1638                              <1> 	; 12/11/2016 - Erdogan Tan
  1639                              <1> 	; (Ref: KolibriOS, vt823x.asm, 'create_primary_buff')
  1640                              <1> 	;push	edx
  1641                              <1> 	;push	ax
  1642 00013F20 50                  <1> 	push	eax ; 23/07/2020
  1643                              <1> 	;push	ecx
  1644 00013F21 0FB705[A2890100]    <1> 	movzx	eax, word [audio_freq] ; Hertz
  1645 00013F28 BA00001000          <1> 	mov	edx, 100000h ; 2^20 = 1048576
  1646 00013F2D F7E2                <1> 	mul	edx
  1647 00013F2F B980BB0000          <1> 	mov	ecx, 48000	
  1648 00013F34 F7F1                <1> 	div	ecx
  1649                              <1> 	;and	eax, 0FFFFFh
  1650                              <1> 	;pop	ecx
  1651                              <1> 	;pop	dx 
  1652 00013F36 5A                  <1> 	pop	edx ; 23/07/2020
  1653 00013F37 C1E218              <1> 	shl	edx, 24  ; STOP Index Setting: Bit 24 to 31
  1654 00013F3A 09D0                <1> 	or	eax, edx
  1655                              <1> 	; 19/11/2016
  1656 00013F3C 803D[A0890100]10    <1> 	cmp	byte [audio_bps], 16
  1657 00013F43 7505                <1> 	jne	short sLVI_1
  1658 00013F45 0D00002000          <1> 	or	eax, VIA8233_REG_TYPE_16BIT
  1659                              <1> sLVI_1:
  1660 00013F4A 803D[A1890100]02    <1> 	cmp	byte [audio_stmo], 2
  1661 00013F51 7505                <1> 	jne	short sLVI_2
  1662 00013F53 0D00001000          <1> 	or	eax, VIA8233_REG_TYPE_STEREO
  1663                              <1> sLVI_2:
  1664                              <1> 	;mov	edx, VIADEV_PLAYBACK + VIA_REG_OFFSET_STOP_IDX
  1665                              <1> 	; 06/08/2022
  1666 00013F58 29D2                <1> 	sub	edx, edx
  1667 00013F5A B208                <1> 	mov	dl, VIADEV_PLAYBACK + VIA_REG_OFFSET_STOP_IDX
  1668 00013F5C E89CFDFFFF          <1> 	call    ctrl_io_w32
  1669                              <1> 	;call	codec_check_ready
  1670                              <1> 	;pop	edx
  1671 00013F61 C3                  <1> 	retn
  1672                              <1> 
  1673                              <1> vt8233_pause: ; pause
  1674                              <1> 	; 10/06/2017
  1675                              <1> 	; 22/04/2017
  1676                              <1> 	;mov	al, VIA_REG_CTRL_INT
  1677                              <1>         ;or	al, VIA_REG_CTRL_PAUSE
  1678                              <1> 	; 23/07/2020
  1679 00013F62 B029                <1> 	mov	al, VIA_REG_CTRL_PAUSE+VIA_REG_CTRL_INT_FLAG+VIA_REG_CTRL_AUTOSTART
  1680                              <1> 	
  1681 00013F64 66BA0100            <1> 	mov     dx, VIADEV_PLAYBACK + VIA_REG_OFFSET_CONTROL
  1682 00013F68 E87EFDFFFF          <1>         call    ctrl_io_w8
  1683                              <1> 	;call	codec_check_ready
  1684                              <1> 	;retn
  1685                              <1> 	;jmp	codec_check_ready
  1686 00013F6D C3                  <1> 	retn
  1687                              <1> 
  1688                              <1> vt8233_reset: 
  1689                              <1> 	; 22/04/2017
  1690                              <1> 	; reset VT8237R (vt8233) Audio Controller
  1691                              <1> 	;cmp	byte [audio_play_cmd], 1
  1692                              <1> 	;jna	short vt8233_rst_0
  1693 00013F6E C605[A6890100]00    <1> 	mov	byte [audio_play_cmd], 0 ; stop !
  1694                              <1> vt8233_rst_0:
  1695 00013F75 E8D6FCFFFF          <1> 	call	reset_codec
  1696 00013F7A 720A                <1> 	jc	short vt8233_rst_1 ; codec error !
  1697                              <1> 	; eax = 1
  1698 00013F7C E84EFDFFFF          <1> 	call	codec_io_w16 ; w32
  1699 00013F81 E8B7FEFFFF          <1> 	call	channel_reset
  1700                              <1> vt8233_rst_1:
  1701                              <1> vt8233_vol_1:	; 06/08/2022
  1702 00013F86 C3                  <1> 	retn
  1703                              <1> 
  1704                              <1> vt8233_volume:
  1705                              <1> 	; set VT8237R (vt8233) sound volume level
  1706                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  1707                              <1> 	; 24/04/2017
  1708                              <1> 	; 22/04/2017
  1709                              <1> 	; bl = component (0 = master/playback/lineout volume)
  1710                              <1> 	; cl = left channel volume level (0 to 31)
  1711                              <1> 	; ch = right channel volume level (0 to 31)
  1712                              <1> 
  1713 00013F87 08DB                <1> 	or	bl, bl
  1714 00013F89 75FB                <1> 	jnz	short vt8233_vol_1 ; temporary !
  1715 00013F8B 66B81F1F            <1> 	mov	ax, 1F1Fh ; 31,31
  1716 00013F8F 38C1                <1> 	cmp	cl, al
  1717 00013F91 77F3                <1> 	ja	short vt8233_vol_1 ; temporary !
  1718 00013F93 38E5                <1> 	cmp	ch, ah
  1719 00013F95 77EF                <1> 	ja	short vt8233_vol_1 ; temporary !
  1720 00013F97 66890D[A8890100]    <1> 	mov	[audio_master_volume], cx
  1721 00013F9E 6629C8              <1> 	sub	ax, cx
  1722                              <1> 	;mov	edx, CODEC_MASTER_VOL_REG ; 02h ; Line Out
  1723                              <1> 	; 06/08/2022
  1724 00013FA1 29D2                <1> 	sub	edx, edx
  1725 00013FA3 B202                <1> 	mov	dl, CODEC_MASTER_VOL_REG ; 02h ; Line Out
  1726                              <1> 	; 06/08/2022
  1727 00013FA5 E988FDFFFF          <1> 	jmp	codec_write
  1728                              <1> 	;call	codec_write
  1729                              <1> ;vt8233_vol_1:
  1730                              <1> 	;retn
  1731                              <1> 
  1732                              <1> ; CODE for SOUND BLASTER 16
  1733                              <1> 
  1734                              <1> DetectSB:
  1735                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  1736                              <1> 	; 24/04/2017
  1737                              <1> 	;pushad
  1738                              <1> ScanPort:
  1739                              <1> 	; 06/08/2022
  1740 00013FAA 66BB1002            <1> 	mov	bx, 0210h	; start scanning ports
  1741                              <1> 				; 210h, 220h, .. 260h
  1742                              <1> 	; 06/08/2022
  1743 00013FAE 31C9                <1> 	xor	ecx, ecx
  1744 00013FB0 88FE                <1> 	mov	dh, bh
  1745                              <1> ResetDSP:       
  1746                              <1> 	;mov	dx, bx		; try to reset the DSP.
  1747                              <1> 	;add	dx, 06h
  1748                              <1> 	; 06/08/2022
  1749 00013FB2 88DA                <1> 	mov	dl, bl
  1750 00013FB4 80C206              <1> 	add	dl, 06h
  1751                              <1> 
  1752 00013FB7 B001                <1> 	mov	al, 1
  1753 00013FB9 EE                  <1> 	out	dx, al
  1754                              <1> 
  1755 00013FBA EC                  <1> 	in	al, dx
  1756 00013FBB EC                  <1> 	in	al, dx
  1757 00013FBC EC                  <1> 	in	al, dx
  1758 00013FBD EC                  <1> 	in	al, dx
  1759                              <1> 
  1760 00013FBE 30C0                <1> 	xor     al, al
  1761 00013FC0 EE                  <1> 	out	dx, al
  1762                              <1> 
  1763                              <1> 	;add	dx, 08h
  1764                              <1> 	; 06/08/2022
  1765 00013FC1 80C208              <1> 	add	dl, 08h
  1766                              <1> 	;mov	cx, 100
  1767 00013FC4 B164                <1> 	mov	cl, 100
  1768                              <1> WaitID:
  1769 00013FC6 EC                  <1> 	in	al, dx
  1770 00013FC7 08C0                <1> 	or      al, al
  1771 00013FC9 7804                <1> 	js      short GetID
  1772 00013FCB E2F9                <1> 	loop    WaitID
  1773 00013FCD EB0D                <1> 	jmp     short NextPort
  1774                              <1> GetID:          
  1775                              <1> 	;sub	dx, 04h
  1776                              <1> 	; 06/08/2022
  1777 00013FCF 80EA04              <1> 	sub	dl, 04h
  1778 00013FD2 EC                  <1> 	in	al, dx
  1779 00013FD3 3CAA                <1> 	cmp     al, 0AAh
  1780 00013FD5 740F                <1> 	je      short Found
  1781                              <1> 	;add	dx, 04h
  1782                              <1> 	; 06/08/2022
  1783 00013FD7 80C204              <1> 	add	dl, 04h
  1784 00013FDA E2EA                <1> 	loop    WaitID
  1785                              <1> NextPort:
  1786                              <1> 	;add	bx, 10h		; if not response,
  1787                              <1> 	; 06/08/2022
  1788 00013FDC 80C310              <1> 	add	bl, 10h
  1789                              <1> 	;cmp	bx, 260h	; try the next port.
  1790 00013FDF 80FB60              <1> 	cmp	bl, 60h
  1791 00013FE2 76CE                <1> 	jbe     short ResetDSP
  1792 00013FE4 F9                  <1> 	stc
  1793 00013FE5 C3                  <1> 	retn
  1794                              <1> Found:
  1795 00013FE6 66891D[76890100]    <1> 	mov     [audio_io_base], bx	; SB Port Address Found!
  1796                              <1> ScanIRQ:
  1797                              <1> SetIrqs:
  1798 00013FED 28C0                <1> 	sub 	al, al ; 0
  1799 00013FEF A2[6C890100]        <1> 	mov 	[IRQnum], al ; reset
  1800 00013FF4 A2[72890100]        <1> 	mov	[audio_intr], al ; reset
  1801                              <1> 
  1802                              <1> 	; ah > 0 -> set IRQ vector
  1803                              <1> 	; al = IRQ number
  1804                              <1> 	;mov	ax, 103h ; IRQ 3
  1805                              <1> 	;call	set_hardware_int_vector
  1806                              <1> 	;mov	ax, 104h ; IRQ 4
  1807                              <1> 	;call	set_hardware_int_vector
  1808 00013FF9 66B80501            <1> 	mov	ax, 105h ; IRQ 5
  1809 00013FFD E8B3E1FFFF          <1> 	call	set_hardware_int_vector
  1810 00014002 66B80701            <1> 	mov	ax, 107h ; IRQ 7
  1811 00014006 E8AAE1FFFF          <1> 	call	set_hardware_int_vector
  1812                              <1> 
  1813 0001400B 668B15[76890100]    <1> 	mov     dx, [audio_io_base] ; tells to the SB to
  1814                              <1> 	;add	dx, 0Ch		    ; generate a IRQ!
  1815                              <1> 	; 06/08/2022
  1816 00014012 80C20C              <1> 	add	dl, 0Ch
  1817                              <1> WaitSb:
  1818 00014015 EC                  <1> 	in	al, dx
  1819 00014016 08C0                <1> 	or      al, al
  1820 00014018 78FB                <1> 	js      short WaitSb
  1821 0001401A B0F2                <1> 	mov     al, 0F2h
  1822 0001401C EE                  <1> 	out	dx, al
  1823                              <1> 
  1824 0001401D 31C9                <1> 	xor     ecx, ecx	; wait until IRQ level
  1825                              <1> WaitIRQ: 
  1826 0001401F A0[6C890100]        <1> 	mov	al, [IRQnum]
  1827 00014024 3C00                <1> 	cmp     al, 0 ; is changed or timeout.
  1828 00014026 7706                <1> 	ja	short IrqOk
  1829 00014028 6649                <1> 	dec	cx
  1830 0001402A 75F3                <1> 	jnz	short WaitIRQ
  1831 0001402C EB14                <1> 	jmp	short RestoreIrqs
  1832                              <1> IrqOk:
  1833 0001402E A2[72890100]        <1> 	mov	[audio_intr], al ; set   
  1834 00014033 668B15[76890100]    <1> 	mov     dx, [audio_io_base]
  1835                              <1> 	;add	dx, 0Eh
  1836                              <1> 	; 06/08/2022
  1837 0001403A 80C20E              <1> 	add	dl, 0Eh
  1838 0001403D EC                  <1> 	in	al, dx	; SB acknowledge.
  1839 0001403E B020                <1> 	mov	al, 20h
  1840 00014040 E620                <1> 	out	20h, al	; Hardware acknowledge.
  1841                              <1> 
  1842                              <1> RestoreIrqs:
  1843                              <1> 	; ah = 0 -> reset IRQ vector
  1844                              <1> 	; al = IRQ number
  1845                              <1> 	;mov	ax, 3 ; IRQ 3
  1846                              <1> 	;call	set_hardware_int_vector
  1847                              <1> 	;mov	ax, 4 ; IRQ 4
  1848                              <1> 	;call	set_hardware_int_vector
  1849 00014042 66B80500            <1> 	mov	ax, 5 ; IRQ 5
  1850 00014046 E86AE1FFFF          <1> 	call	set_hardware_int_vector
  1851 0001404B 66B80700            <1> 	mov	ax, 7 ; IRQ 7
  1852 0001404F E861E1FFFF          <1> 	call	set_hardware_int_vector
  1853                              <1> 
  1854 00014054 31D2                <1> 	xor	edx, edx
  1855 00014056 8915[78890100]      <1> 	mov	[audio_dev_id], edx ; 0
  1856 0001405C 8915[7C890100]      <1> 	mov	[audio_vendor], edx ; 0
  1857                              <1> 	; 22/11/2023
  1858                              <1> 	;mov	[audio_stats_cmd], edx ; 0
  1859                              <1> 
  1860                              <1> 	;popad
  1861                              <1> 
  1862 00014062 803D[72890100]01    <1> 	cmp     byte [audio_intr], 1 ; IRQ level was changed?
  1863                              <1> 	
  1864 00014069 C3                  <1> 	retn
  1865                              <1> 
  1866                              <1> %macro	SbOut	1
  1867                              <1> %%Wait:
  1868                              <1> 	in	al, dx
  1869                              <1> 	or	al, al
  1870                              <1> 	js	short %%Wait
  1871                              <1> 	mov	al, %1
  1872                              <1> 	out	dx, al
  1873                              <1> %endmacro
  1874                              <1> 
  1875                              <1> SbInit_play:
  1876                              <1> 	; 06/08/2022 - TRDOS 386 Kernel v2.0.5 
  1877                              <1> 	; 22/10/2017
  1878                              <1> 	; 20/10/2017
  1879                              <1> 	; 06/10/2017
  1880                              <1> 	; 13/07/2017 - 09/08/2017
  1881                              <1> 	; 24/04/2017 - 15/05/2017 - 24/06/2017
  1882                              <1> 	;pushad
  1883                              <1> SetBuffer:
  1884                              <1> 	;mov	byte [DmaFlag], 0
  1885                              <1> 
  1886 0001406A 8B1D[90890100]      <1> 	mov	ebx, [audio_dma_buff] ; physical addr of DMA buff
  1887 00014070 89DF                <1> 	mov	edi, ebx
  1888 00014072 8B0D[94890100]      <1> 	mov     ecx, [audio_dmabuff_size]
  1889                              <1> 
  1890 00014078 803D[A0890100]10    <1> 	cmp	byte [audio_bps], 16
  1891 0001407F 7531                <1> 	jne	short sbInit_0 ; set 8 bit DMA buffer
  1892                              <1> 	
  1893                              <1> 	; 09/08/2017
  1894                              <1> 	; convert byte count to word count
  1895 00014081 D1E9                <1> 	shr	ecx, 1
  1896 00014083 49                  <1> 	dec	ecx ; word count - 1
  1897                              <1> 	; convert byte offset to word offset
  1898 00014084 D1EB                <1> 	shr	ebx, 1
  1899                              <1> 
  1900                              <1> 	; 16 bit DMA buffer setting (DMA channel 5)
  1901 00014086 B005                <1> 	mov     al, 05h  ; set mask bit for channel 5  (4+1)
  1902 00014088 E6D4                <1> 	out	0D4h, al
  1903                              <1> 	
  1904 0001408A 30C0                <1> 	xor     al, al   ; stops all DMA processes on selected channel
  1905 0001408C E6D8                <1> 	out	0D8h, al ; clear selected channel register
  1906                              <1> 
  1907 0001408E 88D8                <1> 	mov     al, bl	 ; byte 0 of DMA buffer offset in words (physical) 
  1908 00014090 E6C4                <1> 	out	0C4h, al ; DMA channel 5 port number
  1909                              <1> 
  1910 00014092 88F8                <1> 	mov     al, bh   ; byte 1 of DMA buffer offset in words (physical)   
  1911 00014094 E6C4                <1> 	out	0C4h, al
  1912                              <1> 	
  1913                              <1> 	; 09/08/2017
  1914 00014096 C1EB0F              <1> 	shr	ebx, 15	 ; complete 16 bit shift
  1915 00014099 80E3FE              <1> 	and	bl, 0FEh ; clear bit 0 (not necessary, it will be ignored)
  1916                              <1> 
  1917 0001409C 88D8                <1> 	mov     al, bl   ; byte 2 of DMA buffer address (physical) 
  1918 0001409E E68B                <1> 	out	8Bh, al  ; page register port addr for channel 5 ; 13/07/2017
  1919                              <1> 
  1920 000140A0 88C8                <1> 	mov     al, cl   ; low byte of DMA count - 1
  1921 000140A2 E6C6                <1> 	out	0C6h, al ; count register port addr for channel 1
  1922                              <1> 
  1923 000140A4 88E8                <1> 	mov     al, ch   ; high byte of DMA count - 1
  1924 000140A6 E6C6                <1> 	out	0C6h, al
  1925                              <1> 
  1926                              <1> 	; channel 5, read, autoinitialized, single mode
  1927                              <1> 	;mov	al, 49h
  1928 000140A8 B059                <1> 	mov	al, 59h  ; 06/10/2017 
  1929 000140AA E6D6                <1> 	out	0D6h, al ; DMA mode register port address
  1930                              <1> 
  1931 000140AC B001                <1> 	mov     al, 01h  ; clear mask bit for channel 1
  1932 000140AE E6D4                <1> 	out	0D4h, al ; DMA mask register port address
  1933                              <1> 
  1934 000140B0 EB28                <1> 	jmp	short ClearBuffer
  1935                              <1> 
  1936                              <1> sbInit_0:    
  1937 000140B2 49                  <1> 	dec     ecx	; 09/08/2017
  1938                              <1> 
  1939                              <1> 	; 8 bit DMA buffer setting (DMA channel 1)
  1940 000140B3 B005                <1> 	mov     al, 05h ; set mask bit for channel 1  (4+1)
  1941 000140B5 E60A                <1> 	out	0Ah, al ; DMA mask register
  1942                              <1> 
  1943 000140B7 30C0                <1> 	xor     al, al  ; stops all DMA processes on selected channel
  1944 000140B9 E60C                <1> 	out	0Ch, al ; clear selected channel register
  1945                              <1> 
  1946 000140BB 88D8                <1> 	mov     al, bl	; byte 0 of DMA buffer address (physical)   
  1947 000140BD E602                <1> 	out	02h, al ; DMA channel 1 port number
  1948                              <1> 
  1949 000140BF 88F8                <1> 	mov     al, bh  ; byte 1 of DMA buffer address (physical)   
  1950 000140C1 E602                <1> 	out	02h, al
  1951                              <1> 
  1952 000140C3 C1EB10              <1> 	shr	ebx, 16
  1953                              <1> 
  1954 000140C6 88D8                <1> 	mov     al, bl  ; byte 2 of DMA buffer address (physical)   
  1955 000140C8 E683                <1> 	out	83h, al ; page register port addr for channel 1
  1956                              <1> 
  1957 000140CA 88C8                <1> 	mov     al, cl  ; low byte of DMA count - 1
  1958 000140CC E603                <1> 	out	03h, al ; count register port addr for channel 1
  1959                              <1> 
  1960 000140CE 88E8                <1> 	mov     al, ch  ; high byte of DMA count - 1
  1961 000140D0 E603                <1> 	out	03h, al
  1962                              <1> 
  1963                              <1> 	; channel 1, read, autoinitialized, single mode
  1964                              <1> 	;mov	al, 49h
  1965 000140D2 B059                <1> 	mov	al, 59h ; 06/10/2017 
  1966 000140D4 E60B                <1> 	out	0Bh, al ; DMA mode register port address
  1967                              <1> 
  1968 000140D6 B001                <1> 	mov     al, 01h ; clear mask bit for channel 1
  1969 000140D8 E60A                <1> 	out	0Ah, al ; DMA mask register port address
  1970                              <1> 
  1971                              <1> ClearBuffer:
  1972                              <1> 	;;mov	edi, [audio_dma_buff]
  1973                              <1> 	;;mov	ecx, [audio_dmabuff_size]
  1974                              <1> 	;inc	ecx
  1975                              <1> 	;mov	al, 80h
  1976                              <1> 	;;cld
  1977                              <1> 	;rep	stosb
  1978                              <1> SetIrq:
  1979                              <1> 	;mov	ebx, SbIrqhandler
  1980                              <1> 	;mov	al, [audio_intr] ; IRQ number	
  1981                              <1> 	;call	set_dev_IRQ_service
  1982                              <1> 	;; SETUP (audio) INTERRUPT CALLBACK SERVICE
  1983                              <1> 	;mov	bl, [audio_intr] ; IRQ number
  1984                              <1> 	;mov	bh, [audio_cb_mode]
  1985                              <1> 	;inc	bh  ; 1 = Signal Response Byte method (fixed value)
  1986                              <1> 	;	    ; 2 = Callback service method
  1987                              <1> 	;	    ; 3 = Auto Increment S.R.B. method 	
  1988                              <1> 	;mov	cl, [audio_srb]
  1989                              <1> 	;mov	edx, [audio_cb_addr]
  1990                              <1> 	;mov	al, [audio_user]
  1991                              <1>  	;call	set_irq_callback_service
  1992                              <1> ResetDsp:
  1993 000140DA 668B15[76890100]    <1> 	mov     dx, [audio_io_base]
  1994                              <1> 	;add	dx, 06h
  1995                              <1> 	; 06/08/2022
  1996 000140E1 80C206              <1> 	add	dl, 06h
  1997 000140E4 B001                <1> 	mov     al, 1
  1998 000140E6 EE                  <1> 	out	dx, al
  1999                              <1> 
  2000 000140E7 EC                  <1> 	in	al, dx
  2001 000140E8 EC                  <1> 	in	al, dx
  2002 000140E9 EC                  <1> 	in	al, dx
  2003 000140EA EC                  <1> 	in	al, dx
  2004                              <1> 
  2005 000140EB 30C0                <1> 	xor     al, al
  2006 000140ED EE                  <1> 	out	dx, al
  2007                              <1> 
  2008                              <1> 	;mov	cx, 100
  2009                              <1> 	; 06/08/2022
  2010 000140EE 29C9                <1> 	sub	ecx, ecx
  2011 000140F0 B164                <1> 	mov	cl, 100
  2012 000140F2 28E4                <1> 	sub	ah, ah ; 0
  2013                              <1> WaitId:         
  2014 000140F4 668B15[76890100]    <1> 	mov     dx, [audio_io_base]
  2015                              <1> 	;add	dx, 0Eh
  2016                              <1> 	; 06/08/2022
  2017 000140FB 80C20E              <1> 	add	dl, 0Eh
  2018 000140FE EC                  <1> 	in	al, dx
  2019 000140FF 08C0                <1> 	or      al, al
  2020 00014101 7807                <1> 	js      short sb_GetId
  2021 00014103 E2EF                <1> 	loop    WaitId
  2022 00014105 E9B1000000          <1> 	jmp     sb_Exit
  2023                              <1> sb_GetId:
  2024 0001410A 668B15[76890100]    <1> 	mov     dx, [audio_io_base]
  2025                              <1> 	;add	dx, 0Ah
  2026                              <1> 	; 06/08/2022
  2027 00014111 80C20A              <1> 	add	dl, 0Ah
  2028 00014114 EC                  <1> 	in	al, dx
  2029 00014115 3CAA                <1> 	cmp     al, 0AAh
  2030 00014117 7407                <1> 	je      short SbOk
  2031 00014119 E2D9                <1> 	loop    WaitId
  2032 0001411B E99B000000          <1> 	jmp	sb_Exit
  2033                              <1> SbOk:
  2034 00014120 668B15[76890100]    <1> 	mov     dx, [audio_io_base]
  2035                              <1> 	;add	dx, 0Ch
  2036                              <1> 	; 06/08/2022
  2037 00014127 80C20C              <1> 	add	dl, 0Ch
  2038                              <1> 	SbOut   0D1h ; Turn on speaker
  1867                              <2> %%Wait:
  1868 0001412A EC                  <2>  in al, dx
  1869 0001412B 08C0                <2>  or al, al
  1870 0001412D 78FB                <2>  js short %%Wait
  1871 0001412F B0D1                <2>  mov al, %1
  1872 00014131 EE                  <2>  out dx, al
  2039                              <1> 	SbOut   41h ; 8h bit or 16 bit transfer
  1867                              <2> %%Wait:
  1868 00014132 EC                  <2>  in al, dx
  1869 00014133 08C0                <2>  or al, al
  1870 00014135 78FB                <2>  js short %%Wait
  1871 00014137 B041                <2>  mov al, %1
  1872 00014139 EE                  <2>  out dx, al
  2040 0001413A 668B1D[A2890100]    <1> 	mov	bx, [audio_freq] ; sampling rate (Hz)
  2041                              <1> 	SbOut	bh ; sampling rate high byte
  1867                              <2> %%Wait:
  1868 00014141 EC                  <2>  in al, dx
  1869 00014142 08C0                <2>  or al, al
  1870 00014144 78FB                <2>  js short %%Wait
  1871 00014146 88F8                <2>  mov al, %1
  1872 00014148 EE                  <2>  out dx, al
  2042                              <1> 	SbOut	bl ; sampling rate low byte
  1867                              <2> %%Wait:
  1868 00014149 EC                  <2>  in al, dx
  1869 0001414A 08C0                <2>  or al, al
  1870 0001414C 78FB                <2>  js short %%Wait
  1871 0001414E 88D8                <2>  mov al, %1
  1872 00014150 EE                  <2>  out dx, al
  2043                              <1> 
  2044                              <1> 	; 22/05/2017
  2045 00014151 E8BF000000          <1> 	call	sb16_volume_initial ; 15/05/2017
  2046                              <1> 	; 20/05/2017
  2047                              <1> 	;call	sb16_volume
  2048                              <1> 
  2049                              <1> StartDma: 
  2050                              <1> 	; autoinitialized mode
  2051 00014156 803D[A0890100]10    <1> 	cmp	byte [audio_bps], 16 ; 16 bit samples
  2052 0001415D 7411                <1> 	je	short sb_play_1
  2053                              <1> 	; 8 bit samples
  2054 0001415F 66BBC600            <1> 	mov	bx, 0C6h ; 8 bit output (0C6h)
  2055 00014163 803D[A1890100]02    <1> 	cmp	byte [audio_stmo], 2 ; 1 = mono, 2 = stereo
  2056 0001416A 7214                <1> 	jb	short sb_play_2
  2057 0001416C B720                <1> 	mov	bh, 20h	; 8 bit stereo (20h)
  2058 0001416E EB10                <1> 	jmp	short sb_play_2
  2059                              <1> sb_play_1:
  2060                              <1> 	; 16 bit samples
  2061 00014170 66BBB610            <1> 	mov	bx, 10B6h ; 16 bit output (0B6h)
  2062 00014174 803D[A1890100]02    <1> 	cmp	byte [audio_stmo], 2 ; 1 = mono, 2 = stereo
  2063 0001417B 7203                <1> 	jb	short sb_play_2
  2064 0001417D 80C720              <1> 	add	bh, 20h	; 16 bit stereo (30h)
  2065                              <1> sb_play_2:     
  2066                              <1> 	; PCM output (8/16 bit mono autoinitialized transfer)
  2067                              <1> 	SbOut   bl ; bCommand
  1867                              <2> %%Wait:
  1868 00014180 EC                  <2>  in al, dx
  1869 00014181 08C0                <2>  or al, al
  1870 00014183 78FB                <2>  js short %%Wait
  1871 00014185 88D8                <2>  mov al, %1
  1872 00014187 EE                  <2>  out dx, al
  2068                              <1> 	SbOut	bh ; bMode
  1867                              <2> %%Wait:
  1868 00014188 EC                  <2>  in al, dx
  1869 00014189 08C0                <2>  or al, al
  1870 0001418B 78FB                <2>  js short %%Wait
  1871 0001418D 88F8                <2>  mov al, %1
  1872 0001418F EE                  <2>  out dx, al
  2069 00014190 8B1D[94890100]      <1> 	mov	ebx, [audio_dmabuff_size]  ; 15/05/2017
  2070 00014196 D1EB                <1> 	shr	ebx, 1 ; half buffer size
  2071                              <1> 	; 20/10/2017	
  2072 00014198 803D[A0890100]10    <1> 	cmp	byte [audio_bps], 16 ; 16 bit DMA
  2073 0001419F 7502                <1> 	jne	short sb_play_3
  2074 000141A1 D1EB                <1> 	shr	ebx, 1 ; byte count to word count
  2075                              <1> sb_play_3: 
  2076                              <1> 	;dec	bx  ; wBlkSize is one less than the actual size 
  2077                              <1> 	; 06/08/2022
  2078 000141A3 4B                  <1> 	dec	ebx
  2079                              <1> 	SbOut   bl
  1867                              <2> %%Wait:
  1868 000141A4 EC                  <2>  in al, dx
  1869 000141A5 08C0                <2>  or al, al
  1870 000141A7 78FB                <2>  js short %%Wait
  1871 000141A9 88D8                <2>  mov al, %1
  1872 000141AB EE                  <2>  out dx, al
  2080                              <1> 	SbOut   bh
  1867                              <2> %%Wait:
  1868 000141AC EC                  <2>  in al, dx
  1869 000141AD 08C0                <2>  or al, al
  1870 000141AF 78FB                <2>  js short %%Wait
  1871 000141B1 88F8                <2>  mov al, %1
  1872 000141B3 EE                  <2>  out dx, al
  2081                              <1> 
  2082 000141B4 C605[A6890100]01    <1> 	mov	byte [audio_play_cmd], 1 ; playing !
  2083                              <1> 
  2084                              <1> 	;; Set Voice and master volumes
  2085                              <1> 	;mov	dx, [audio_io_base]
  2086                              <1> 	;add	dl, 4 ; Mixer chip Register Address Port
  2087                              <1> 	;SbOut	30h   ; select Master Volume Register (L)
  2088                              <1> 	;inc	dl    ; Mixer chip Register Data Port
  2089                              <1> 	;SbOut	0F8h  ; Max. volume value is 31 (31*8)
  2090                              <1> 	;dec	dl
  2091                              <1> 	;SbOut	31h   ; select Master Volume Register (R)
  2092                              <1> 	;inc	dl
  2093                              <1> 	;SbOut	0F8h  ; Max. volume value is 31 (31*8)
  2094                              <1> 	;dec	dl
  2095                              <1> 	;SbOut	32h   ; select Voice Volume Register (L)
  2096                              <1> 	;inc	dl
  2097                              <1> 	;SbOut	0F8h  ; Max. volume value is 31 (31*8)
  2098                              <1> 	;dec	dl
  2099                              <1> 	;SbOut	33h   ; select Voice Volume Register (R)
  2100                              <1> 	;inc	dl
  2101                              <1> 	;SbOut	0F8h  ; Max. volume value is 31 (31*8)	
  2102                              <1> 	;;
  2103                              <1> 	;dec	dl
  2104                              <1> 	;SbOut	44h   ; select Treble Register (L)
  2105                              <1> 	;inc	dl
  2106                              <1> 	;SbOut	0F0h  ; Max. Treble value is 15 (15*16)
  2107                              <1> 	;dec	dl
  2108                              <1> 	;SbOut	45h   ; select Treble Register (R)
  2109                              <1> 	;inc	dl
  2110                              <1> 	;SbOut	0F0h  ; Max. Treble value is 15 (15*16)
  2111                              <1> 	;dec	dl
  2112                              <1> 	;SbOut	46h   ; select Bass Register (L)
  2113                              <1> 	;inc	dl
  2114                              <1> 	;SbOut	0F0h  ; Max. Bass value is 15 (15*16)
  2115                              <1> 	;dec	dl
  2116                              <1> 	;SbOut	47h   ; select Bass Register (R)
  2117                              <1> 	;inc	dl
  2118                              <1> 	;SbOut	0F0h  ; Max. Bass value is 15 (15*16)	
  2119                              <1> 
  2120                              <1> sb_Exit:           
  2121                              <1> 	;popad
  2122 000141BB C3                  <1> 	retn
  2123                              <1> 
  2124                              <1> sb16_int_handler:
  2125                              <1> 	; Interrupt Handler for Sound Blaster 16 Audio Card
  2126                              <1> 	; Note: called by 'dev_IRQ_service'
  2127                              <1> 	; 20/10/2017
  2128                              <1> 	; 12/10/2017
  2129                              <1> 	; 10/10/2017 
  2130                              <1> 	; 12/05/2017, 09/10/2017
  2131                              <1> 	; 24/04/2017 (TRDOS 386 kernel, 'audio.s')
  2132                              <1> 	; 10/03/2017 - 'PLAYWAV.PRG' ('playwav.s') 
  2133                              <1> 
  2134                              <1> 	;push	eax ; * must be saved !
  2135                              <1> 	;push	ebx ; * must be saved !
  2136                              <1> 	;push	ecx
  2137                              <1> 	;push	edx
  2138                              <1> 	;push	esi
  2139                              <1> 	;push	edi
  2140                              <1> 
  2141 000141BC 668B15[76890100]    <1> 	mov     dx, [audio_io_base]
  2142                              <1> 	; 20/10/2017
  2143 000141C3 80C20F              <1> 	add     dl, 0Fh ; 2xFh (DSP 16 bit intr ack)
  2144 000141C6 803D[A0890100]10    <1> 	cmp	byte [audio_bps], 16
  2145 000141CD 7402                <1> 	je	short sb_irq_16bit_ack
  2146                              <1> sb_irq_8bit_ack:
  2147 000141CF FECA                <1> 	dec	dl  ; 2xEh (DSP 8 bit intr ack)
  2148                              <1> sb_irq_16bit_ack:
  2149 000141D1 EC                  <1> 	in	al, dx
  2150                              <1> 
  2151                              <1> 	;cmp	byte [audio_busy], 0
  2152                              <1> 	;ja	short sb_irq_h3
  2153                              <1> 
  2154                              <1> 	;mov	byte [audio_busy], 1
  2155                              <1> 
  2156 000141D2 803D[A6890100]01    <1> 	cmp	byte [audio_play_cmd], 1
  2157 000141D9 7307                <1> 	jnb	short sb_irq_h1
  2158                              <1> sb_irq_h0:
  2159 000141DB E8A3000000          <1> 	call	sb16_stop
  2160 000141E0 EB2B                <1> 	jmp	short sb_irq_h3
  2161                              <1> sb_irq_h1:
  2162                              <1> 	;call	sb16_tuneloop
  2163                              <1> 	; 09/10/2017
  2164                              <1> sb16_tuneloop:
  2165 000141E2 8B3D[90890100]      <1> 	mov	edi, [audio_dma_buff]
  2166 000141E8 8B0D[94890100]      <1> 	mov	ecx, [audio_dmabuff_size]
  2167 000141EE D1E9                <1> 	shr	ecx, 1 ; dma buff size / 2 = half buffer size
  2168                              <1> 
  2169                              <1> 	; 22/05/2017
  2170 000141F0 F605[98890100]01    <1> 	test	byte [audio_flag], 1  ; Current flag value
  2171 000141F7 7402                <1> 	jz	short sb_tlp1 ; EOL (Half Buffer 1 must be filled)
  2172                              <1> 	; FLAG (Half Buffer 2 must be filled)
  2173 000141F9 01CF                <1> 	add	edi, ecx
  2174                              <1> 	; 15/05/2017
  2175                              <1> sb_tlp1: 
  2176 000141FB 8B35[88890100]      <1> 	mov	esi, [audio_p_buffer] ; phy addr of audio buff
  2177                              <1> 	;rep	movsb
  2178 00014201 C1E902              <1> 	shr	ecx, 2 ; half buff size / 4
  2179 00014204 F3A5                <1> 	rep	movsd 
  2180                              <1> 	;retn
  2181                              <1> 
  2182                              <1> 	; 10/10/2017
  2183                              <1> 	; switch flag value
  2184 00014206 8035[98890100]01    <1> 	xor	byte [audio_flag], 1
  2185                              <1> 
  2186                              <1> 	; 12/10/2017
  2187                              <1> 	; [audio_flag] = 0 : Playing dma half buffer 2 (odd intr count)
  2188                              <1> 			   ; Next buffer (to update) is dma half buff 1
  2189                              <1> 	; 	       = 1 : Playing dma half buffer 1 (even intr count)
  2190                              <1> 			   ; Next buffer (to update) is dma half buff 2
  2191                              <1> 
  2192                              <1> sb_irq_h3:
  2193                              <1> 	;mov	byte [audio_busy], 0
  2194                              <1> 
  2195                              <1> 	;pop	edi
  2196                              <1> 	;pop	esi
  2197                              <1> 	;pop	edx
  2198                              <1> 	;pop	ecx
  2199                              <1> 	;pop	ebx ; * must be restored !
  2200                              <1> 	;pop	eax ; * must be restored !
  2201                              <1> 	
  2202 0001420D C3                  <1> 	retn
  2203                              <1> 
  2204                              <1> sb16_volume:
  2205                              <1> 	; 06/08/2022 (TRDOS 386 v2.0.5)
  2206                              <1> 	; 22/10/2017
  2207                              <1> 	; mov [audio_master_volume_l], cl 
  2208                              <1> 	; mov [audio_master_volume_h], ch 
  2209 0001420E 66890D[A8890100]    <1> 	mov	[audio_master_volume], cx
  2210                              <1> sb16_volume_initial:
  2211                              <1> 	;push	dx ; DX (port address) must be saved
  2212                              <1> 	; 06/08/2022
  2213 00014215 52                  <1> 	push	edx
  2214 00014216 668B15[76890100]    <1> 	mov	dx, [audio_io_base]
  2215                              <1> 	;add	dx, 4 ; Mixer chip address port
  2216                              <1> 	; 06/08/2022
  2217 0001421D 80C204              <1> 	add	dl, 4
  2218 00014220 B022                <1> 	mov	al, 22h ; master volume
  2219 00014222 EE                  <1> 	out	dx, al
  2220                              <1> 	;inc	dx
  2221                              <1> 	; 06/08/2022
  2222 00014223 42                  <1> 	inc	edx
  2223 00014224 8A25[A8890100]      <1> 	mov	ah, [audio_master_volume_l]
  2224 0001422A C0EC02              <1> 	shr	ah, 2 ; 32 -> 8 level
  2225 0001422D C0E405              <1> 	shl	ah, 5 ; bit 5 to 7
  2226 00014230 A0[A9890100]        <1> 	mov	al, [audio_master_volume_r]	
  2227 00014235 C0E802              <1> 	shr	al, 2 ; 32 -> 8 level
  2228                              <1> 	;and	al, 0Fh
  2229 00014238 D0E0                <1> 	shl	al, 1 ; bit 1 to 3
  2230 0001423A 08E0                <1> 	or	al, ah
  2231 0001423C EE                  <1> 	out	dx, al
  2232                              <1> 	;pop	dx ; DX (port address) must be restored
  2233                              <1> 	; 06/08/2022
  2234 0001423D 5A                  <1> 	pop	edx
  2235 0001423E C3                  <1> 	retn
  2236                              <1> 
  2237                              <1> sb16_pause:
  2238                              <1> 	; 06/08/2022 (TRDOS 386 v2.0.5)
  2239 0001423F 668B15[76890100]    <1> 	mov	dx, [audio_io_base]
  2240                              <1> 	;add	dx, 0Ch ; Command & Data Port
  2241                              <1> 	; 06/08/2022
  2242 00014246 80C20C              <1> 	add	dl, 0Ch
  2243 00014249 803D[A0890100]10    <1> 	cmp	byte [audio_bps], 16 ; 16 bit samples
  2244 00014250 7404                <1> 	je	short sb_pause_1
  2245                              <1> 	; 8 bit samples
  2246 00014252 B3D0                <1> 	mov	bl, 0D0h ; 8 bit DMA mode
  2247 00014254 EB02                <1> 	jmp	short sb_pause_2
  2248                              <1> sb_pause_1:
  2249                              <1> 	; 16 bit samples
  2250 00014256 B3D5                <1> 	mov	bl, 0D5h ; 16 bit DMA mode
  2251                              <1> sb_pause_2:     
  2252                              <1> 	SbOut   bl ; bCommand
  1867                              <2> %%Wait:
  1868 00014258 EC                  <2>  in al, dx
  1869 00014259 08C0                <2>  or al, al
  1870 0001425B 78FB                <2>  js short %%Wait
  1871 0001425D 88D8                <2>  mov al, %1
  1872 0001425F EE                  <2>  out dx, al
  2253                              <1> sb_pause_3:
  2254 00014260 C3                  <1> 	retn
  2255                              <1> 
  2256                              <1> sb16_continue:
  2257                              <1> 	; 06/08/2022 (TRDOS 386 v2.0.5)
  2258 00014261 668B15[76890100]    <1> 	mov	dx, [audio_io_base]
  2259                              <1> 	;add	dx, 0Ch ; Command & Data Port
  2260                              <1> 	; 06/08/2022
  2261 00014268 80C20C              <1> 	add	dl, 0Ch
  2262 0001426B 803D[A0890100]10    <1> 	cmp	byte [audio_bps], 16 ; 16 bit samples
  2263 00014272 7404                <1> 	je	short sb_cont_1
  2264                              <1> 	; 8 bit samples
  2265 00014274 B3D4                <1> 	mov	bl, 0D4h ; 8 bit DMA mode
  2266 00014276 EB02                <1> 	jmp	short sb_cont_2
  2267                              <1> sb_cont_1:
  2268                              <1> 	; 16 bit samples
  2269 00014278 B3D6                <1> 	mov	bl, 0D6h ; 16 bit DMA mode
  2270                              <1> sb_cont_2:     
  2271                              <1> 	SbOut   bl ; bCommand
  1867                              <2> %%Wait:
  1868 0001427A EC                  <2>  in al, dx
  1869 0001427B 08C0                <2>  or al, al
  1870 0001427D 78FB                <2>  js short %%Wait
  1871 0001427F 88D8                <2>  mov al, %1
  1872 00014281 EE                  <2>  out dx, al
  2272                              <1> sb_cont_3:
  2273 00014282 C3                  <1> 	retn
  2274                              <1> 
  2275                              <1> sb16_stop:
  2276                              <1> 	; 06/08/2022 (TRDOS 386 v2.0.5)
  2277                              <1> 	; 24/04/2017
  2278 00014283 803D[A6890100]00    <1> 	cmp	byte [audio_play_cmd], 0
  2279 0001428A 7647                <1> 	jna	short sb16_stop_4
  2280                              <1> 
  2281                              <1> 	; 22/05/2017
  2282 0001428C 668B15[76890100]    <1> 	mov	dx, [audio_io_base]
  2283                              <1> 	;add	dx, 0Ch
  2284                              <1> 	; 06/08/2022
  2285 00014293 80C20C              <1> 	add	dl, 0Ch
  2286                              <1> 
  2287 00014296 B3D9                <1> 	mov	bl, 0D9h ; exit auto-initialize 16 bit transfer
  2288                              <1> 	; stop  autoinitialized DMA transfer mode 
  2289 00014298 803D[A0890100]10    <1> 	cmp	byte [audio_bps], 16 ; 16 bit samples
  2290 0001429F 7402                <1> 	je	short sb16_stop_1
  2291                              <1> 	;mov	bl, 0DAh ; exit auto-initialize 8 bit transfer
  2292 000142A1 FEC3                <1> 	inc	bl
  2293                              <1> sb16_stop_1:
  2294                              <1> 	SbOut	bl ; exit auto-initialize transfer command
  1867                              <2> %%Wait:
  1868 000142A3 EC                  <2>  in al, dx
  1869 000142A4 08C0                <2>  or al, al
  1870 000142A6 78FB                <2>  js short %%Wait
  1871 000142A8 88D8                <2>  mov al, %1
  1872 000142AA EE                  <2>  out dx, al
  2295                              <1> 
  2296 000142AB 30C0                <1> 	xor     al, al ; stops all DMA processes on selected channel
  2297                              <1> 
  2298 000142AD 803D[A0890100]10    <1> 	cmp	byte [audio_bps], 16 ; 16 bit samples
  2299 000142B4 7404                <1> 	je	short sb16_stop_2
  2300 000142B6 E60C                <1> 	out	0Ch, al ; clear selected channel register
  2301 000142B8 EB02                <1> 	jmp	short sb16_stop_3
  2302                              <1> 
  2303                              <1> sb16_stop_2:
  2304 000142BA E6D8                <1> 	out	0D8h, al ; clear selected channel register
  2305                              <1> 
  2306                              <1> sb16_stop_3:
  2307 000142BC C605[A6890100]00    <1> 	mov	byte [audio_play_cmd], 0 ; stop !
  2308                              <1> SbDone:
  2309                              <1> 	;mov	dx, [audio_io_base]
  2310                              <1> 	;add	dx, 0Ch
  2311                              <1> 	SbOut   0D0h
  1867                              <2> %%Wait:
  1868 000142C3 EC                  <2>  in al, dx
  1869 000142C4 08C0                <2>  or al, al
  1870 000142C6 78FB                <2>  js short %%Wait
  1871 000142C8 B0D0                <2>  mov al, %1
  1872 000142CA EE                  <2>  out dx, al
  2312                              <1> 	SbOut   0D3h
  1867                              <2> %%Wait:
  1868 000142CB EC                  <2>  in al, dx
  1869 000142CC 08C0                <2>  or al, al
  1870 000142CE 78FB                <2>  js short %%Wait
  1871 000142D0 B0D3                <2>  mov al, %1
  1872 000142D2 EE                  <2>  out dx, al
  2313                              <1> sb16_stop_4:
  2314 000142D3 C3                  <1> 	retn
  2315                              <1> 
  2316                              <1> sb16_reset:
  2317                              <1> 	; 06/08/2022 (TRDOS 386 v2.0.5)
  2318                              <1> 	; 24/04/2017
  2319 000142D4 668B15[76890100]    <1> 	mov     dx, [audio_io_base] ; try to reset the DSP.
  2320                              <1> 	;add	dx, 06h
  2321                              <1> 	; 06/08/2022
  2322 000142DB 80C206              <1> 	add	dl, 06h
  2323 000142DE B001                <1> 	mov	al, 1
  2324 000142E0 EE                  <1> 	out	dx, al
  2325                              <1> 
  2326 000142E1 EC                  <1> 	in	al, dx
  2327 000142E2 EC                  <1> 	in	al, dx
  2328 000142E3 EC                  <1> 	in	al, dx
  2329 000142E4 EC                  <1> 	in	al, dx
  2330                              <1> 
  2331 000142E5 30C0                <1> 	xor     al, al
  2332 000142E7 EE                  <1> 	out	dx, al
  2333                              <1> 
  2334                              <1> 	;add	dx, 08h
  2335                              <1> 	; 06/08/2022
  2336 000142E8 80C208              <1> 	add	dl, 08h
  2337                              <1> 	;mov	cx, 100
  2338 000142EB 29C9                <1> 	sub	ecx, ecx
  2339 000142ED B164                <1> 	mov	cl, 100
  2340                              <1> sbrstWaitID:
  2341 000142EF EC                  <1> 	in	al, dx
  2342 000142F0 08C0                <1> 	or      al, al
  2343 000142F2 7804                <1> 	js      short sbrstGetID
  2344 000142F4 E2F9                <1> 	loop    sbrstWaitID
  2345 000142F6 F9                  <1> 	stc
  2346 000142F7 C3                  <1> 	retn
  2347                              <1> sbrstGetID:          
  2348                              <1> 	;sub	dx, 04h
  2349                              <1> 	; 06/08/2022
  2350 000142F8 80EA04              <1> 	sub	dl, 04h
  2351 000142FB EC                  <1> 	in	al, dx
  2352 000142FC 3CAA                <1> 	cmp     al, 0AAh
  2353 000142FE 7405                <1> 	je      short sb_rst_retn
  2354                              <1> 	;add	dx, 04h
  2355                              <1> 	; 06/08/2022
  2356 00014300 80C204              <1> 	add	dl, 04h
  2357 00014303 E2EA                <1> 	loop    sbrstWaitID
  2358                              <1> sb_rst_retn:
  2359 00014305 C3                  <1> 	retn
  2360                              <1> 
  2361                              <1> ac97_codec_config:
  2362                              <1> 	; 26/11/2023
  2363                              <1> 	; 21/11/2023
  2364                              <1> 	; 20/11/2023
  2365                              <1> 	; 19/11/2023 (TRDOS 386 v2.0.7)
  2366                              <1> 	; 10/06/2017
  2367                              <1> 	; 05/06/2017
  2368                              <1> 	; 29/05/2017
  2369                              <1> 	; 28/05/2017 (TRDOS 386, 'audio.s')
  2370                              <1> 	; 07/11/2016 (Erdogan Tan)
  2371                              <1> 	; Derived from 'codecConfig' procedure in 'CODEC.ASM'
  2372                              <1> 	; .wav player for DOS by Jeff Leyda (02/09/2002)
  2373                              <1> 
  2374                              <1> 	;; 'PLAYER.ASM'
  2375                              <1> 	;; get ICH base address regs for mixer and bus master
  2376                              <1> 
  2377                              <1> init_ac97_controller: ; 10/06/2017
  2378 00014306 A1[78890100]        <1> 	mov	eax, [audio_dev_id]
  2379                              <1>         ;mov	al, NAMBAR_REG
  2380                              <1>         ;;call  pciRegRead16			; read PCI registers 10-11
  2381                              <1>         ;call	pciRegRead32
  2382                              <1> 	;and	dx, IO_ADDR_MASK 		; mask off BIT0
  2383                              <1> 	;;and	edx, IO_ADDR_MASK 
  2384                              <1> 
  2385                              <1>         ;mov	[NAMBAR], dx			; save audio mixer base addr
  2386                              <1> 
  2387                              <1>         ;mov    al, NABMBAR_REG
  2388                              <1>         ;;call	pciRegRead16
  2389                              <1>         ;call	pciRegRead32
  2390                              <1> 	;and	dx, 0FFC0h ; IO_ADDR_MASK
  2391                              <1> 	;;and	edx, 0FFC0h
  2392                              <1> 
  2393                              <1>         ;mov    [NABMBAR], dx			; save bus master base addr
  2394                              <1> 
  2395                              <1> 	;mov	eax, [audio_dev_id]
  2396 0001430B B004                <1>         mov     al, PCI_CMD_REG
  2397                              <1>         ;call	pciRegRead8			; read PCI command register
  2398 0001430D E891F8FFFF          <1>         call	pciRegRead16
  2399 00014312 80CA05              <1> 	or      dl, IO_ENA+BM_ENA               ; enable IO and bus master
  2400                              <1>         ;call 	pciRegWrite8
  2401 00014315 E8F4F8FFFF          <1> 	call	pciRegWrite16
  2402                              <1> 
  2403                              <1> 	; 'CODEC.ASM'
  2404                              <1> 
  2405                              <1> 	; enable codec, unmute stuff, set output rate
  2406                              <1> ;	; entry: [audio_freq] = desired sample rate
  2407                              <1> 		
  2408                              <1> ;	mov    	dx, [NAMBAR]               	
  2409                              <1> ;	add    	dx, CODEC_EXT_AUDIO_CTRL_REG  	; 2Ah
  2410                              <1> ;	in     	ax, dx
  2411                              <1> ;	or	ax, 1
  2412                              <1> ;	out	dx, ax 				; Enable variable rate audio
  2413                              <1> 
  2414                              <1> ;       ;call    delay1_4ms
  2415                              <1> ;       ;call    delay1_4ms
  2416                              <1> ;       ;call    delay1_4ms
  2417                              <1> ;       ;call    delay1_4ms
  2418                              <1> 
  2419                              <1> ;	mov	ax, [audio_freq]		; sample rate
  2420                              <1> 
  2421                              <1> ;	mov    	dx, [NAMBAR]               	
  2422                              <1> ;	add    	dx, CODEC_PCM_FRONT_DACRATE_REG	; 2Ch  	  
  2423                              <1> ;	out	dx, ax 				; out sample rate
  2424                              <1> 		
  2425                              <1> ;       ;call	delay1_4ms
  2426                              <1> ;       ;call	delay1_4ms
  2427                              <1> ;       ;call	delay1_4ms
  2428                              <1> ;       ;call	delay1_4ms
  2429                              <1> 
  2430                              <1> 	;mov	dx, [NAMBAR]			; mixer base address
  2431                              <1>         ;add	dx, CODEC_RESET_REG  		; reset register
  2432                              <1>         ;mov	ax, 42
  2433                              <1> 	;out	dx, ax                          ; reset
  2434                              <1> 
  2435                              <1> 	;mov    dx, [NABMBAR]			; bus master base address
  2436                              <1>         ;add	dx, GLOB_STS_REG
  2437                              <1>         ;mov	ax, 2
  2438                              <1> 	;out	dx, ax
  2439                              <1> 
  2440 0001431A E887F9FFFF          <1>         call    delay_100ms ; 29/05/2017
  2441                              <1> 
  2442                              <1> init_ac97_codec:
  2443                              <1> 	; 26/11/2023
  2444                              <1> 	; 19/11/2023
  2445                              <1> 	;   (playwav3.com, ac97_vra.asm, Erdogan Tan, 19/11/2023)
  2446                              <1> 	; 10/06/2017
  2447                              <1> 	; 29/05/2017
  2448                              <1> 	; 28/05/2017 - Erdogan Tan (Ref: KolibriOS, intelac97.asm)
  2449                              <1> 
  2450                              <1> 	;; 23/11/2023 - temporary
  2451                              <1> 	;push	ebx
  2452                              <1> 	;mov	ebx, 0B8000h
  2453                              <1> 	;mov	al, '?'
  2454                              <1> 	;mov	ah, 4Eh
  2455                              <1> 	;mov	[ebx], ax
  2456                              <1> 	;pop	ebx
  2457                              <1> 
  2458                              <1> 	; 19/11/2023
  2459 0001431F BD28000000          <1> 	mov	ebp, 40	; 21/11/2023
  2460                              <1> _initc_1:
  2461                              <1> 	; 26/11/2023
  2462 00014324 66BA2C00            <1> 	mov	dx, GLOB_CNT_REG ; 2Ch
  2463 00014328 660315[76890100]    <1> 	add	dx, [NABMBAR]
  2464 0001432F ED                  <1> 	in	eax, dx
  2465                              <1> 	; ?
  2466 00014330 66BA3000            <1> 	mov	dx, GLOB_STS_REG ; 30h
  2467 00014334 660315[76890100]    <1> 	add	dx, [NABMBAR]
  2468 0001433B ED                  <1> 	in	eax, dx
  2469                              <1> 
  2470 0001433C 83F8FF              <1> 	cmp	eax, 0FFFFFFFFh ; -1
  2471 0001433F 750A                <1> 	jne	short _initc_3
  2472                              <1> _initc_2:
  2473 00014341 4D                  <1> 	dec	ebp	; 21/11/2023
  2474 00014342 7415                <1> 	jz	short _ac97_codec_ready
  2475                              <1> 
  2476 00014344 E85DF9FFFF          <1> 	call	delay_100ms
  2477 00014349 EBD9                <1> 	jmp	short _initc_1
  2478                              <1> _initc_3:
  2479 0001434B A900030010          <1> 	test	eax, CTRL_ST_CREADY
  2480 00014350 7507                <1> 	jnz	short _ac97_codec_ready
  2481                              <1> 
  2482 00014352 E8B3020000          <1> 	call	reset_ac97_codec
  2483                              <1> 	;jc	short _initc_2
  2484                              <1> 	; 26/11/2023
  2485 00014357 EBE8                <1> 	jmp	short _initc_2
  2486                              <1> 
  2487                              <1> _ac97_codec_ready:
  2488 00014359 668B15[74890100]    <1> 	mov	dx, [NAMBAR]
  2489                              <1> 	;add	dx, 0 ; ac_reg_0 ; reset register
  2490 00014360 66EF                <1> 	out	dx, ax
  2491                              <1> 
  2492                              <1> 	; 19/11/2023
  2493 00014362 E83FF9FFFF          <1> 	call	delay_100ms
  2494                              <1> 	; 24/11/2023 - temporary
  2495                              <1> 	;call	delay_100ms
  2496                              <1> 	;call	delay_100ms
  2497                              <1> 	;call	delay_100ms
  2498                              <1> 
  2499 00014367 09ED                <1> 	or	ebp, ebp  ; 21/11/2023	
  2500 00014369 7523                <1> 	jnz	short _ac97_codec_init_ok
  2501                              <1> 
  2502 0001436B 31C0                <1> 	xor	eax, eax ; 0
  2503 0001436D 668B15[74890100]    <1> 	mov	dx, [NAMBAR]
  2504 00014374 6683C226            <1> 	add	dx, CODEC_REG_POWERDOWN
  2505 00014378 66EF                <1> 	out	dx, ax
  2506                              <1> 
  2507                              <1> 	; 10/06/2017
  2508                              <1> 	; 29/05/2017
  2509                              <1> 	; wait for 1 second
  2510                              <1> 	;mov	ecx, 1000 ; 1000*0.25ms = 1s
  2511                              <1> 	; 20/11/2023
  2512                              <1> 	;mov	ecx, 10
  2513 0001437A B10A                <1> 	mov	cl, 10
  2514                              <1> 	; 24/11/2023 - temporary
  2515                              <1> 	;mov	cl, 40
  2516                              <1> _ac97_codec_rloop:
  2517                              <1> 	;call	delay1_4ms
  2518                              <1> 	;call	delay1_4ms
  2519                              <1> 	;call	delay1_4ms
  2520                              <1> 	;call	delay1_4ms
  2521                              <1> 	; 19/11/2023
  2522                              <1> 	; 22/11/2023
  2523 0001437C 51                  <1> 	push	ecx
  2524 0001437D E824F9FFFF          <1> 	call	delay_100ms
  2525 00014382 59                  <1> 	pop	ecx
  2526                              <1> 	;mov	dx, [NAMBAR]
  2527                              <1> 	;add	dx, CODEC_REG_POWERDOWN
  2528 00014383 66ED                <1> 	in	ax, dx	
  2529                              <1> 	;and	ax, 0Fh
  2530                              <1> 	; 21/11/2023
  2531 00014385 240F                <1> 	and	al, 0Fh
  2532 00014387 3C0F                <1> 	cmp	al, 0Fh
  2533 00014389 7403                <1> 	je	short _ac97_codec_init_ok
  2534                              <1> 	; 24/11/2023 - temporary
  2535                              <1> 	;je	short _ac97_codec_init_ok_
  2536                              <1> 	
  2537 0001438B E2EF                <1> 	loop	_ac97_codec_rloop 
  2538                              <1> 	; 22/11/2023
  2539                              <1> 	; cf = 1
  2540                              <1> init_ac97_codec_err1:
  2541                              <1> 	;stc
  2542                              <1> init_ac97_codec_err2:
  2543 0001438D C3                  <1> 	retn
  2544                              <1> 
  2545                              <1> ;_ac97_codec_init_ok_:
  2546                              <1> 	;mov	dx, GLOB_STS_REG ; 30h
  2547                              <1> 	;add	dx, [NABMBAR]
  2548                              <1> 	;in	eax, dx
  2549                              <1> 	;test	eax, CTRL_ST_CREADY
  2550                              <1> 	;jnz	short _ac97_codec_init_ok
  2551                              <1> 	;stc 
  2552                              <1> 	;retn
  2553                              <1> 
  2554                              <1> _ac97_codec_init_ok:
  2555                              <1> 	; 26/11/2023
  2556                              <1> 	; 23/11/2023
  2557                              <1> 	;xor	eax, eax
  2558                              <1> 	; 21/11/2023 - temporary
  2559                              <1> 	; 19/11/2023
  2560                              <1> 	;mov	al, 2 ; force set 16-bit 2-channel PCM
  2561                              <1> 	;mov	dx, GLOB_CNT_REG ; 2Ch
  2562                              <1> 	;add	dx, [NABMBAR]
  2563                              <1> 	;out	dx, eax
  2564                              <1> 
  2565                              <1> 	;call	delay1_4ms
  2566                              <1> 	; 23/11/2023 - temporary
  2567                              <1> 	;call	delay_100ms
  2568                              <1> 
  2569                              <1> 	; 10/06/2017
  2570 0001438E E825020000          <1> 	call 	reset_ac97_controller
  2571                              <1> 
  2572                              <1> 	; 21/11/2023
  2573                              <1> 	;call	delay1_4ms
  2574                              <1> 	; 21/11/2023 - temporary
  2575 00014393 E80EF9FFFF          <1> 	call	delay_100ms
  2576                              <1> 
  2577                              <1> ;	call 	setup_ac97_codec
  2578                              <1> ;
  2579                              <1> ;detect_ac97_codec:
  2580                              <1> ;	retn
  2581                              <1> 
  2582                              <1> setup_ac97_codec:
  2583                              <1> 	; 24/11/2023
  2584                              <1> 	; 19/11/2023 - TRDOS 386 v2.0.7
  2585 00014398 C605[A4890100]01    <1> 	mov	byte [VRA], 1
  2586                              <1> 
  2587                              <1> 	; 25/11/2023 - temporary
  2588                              <1> 	;jmp	short vra_not_supported
  2589                              <1> 
  2590 0001439F 668B15[74890100]    <1> 	mov	dx, [NAMBAR]
  2591 000143A6 6683C228            <1> 	add	dx, CODEC_EXT_AUDIO_REG	; 28h	
  2592 000143AA 66ED                <1> 	in	ax, dx
  2593 000143AC A801                <1> 	test	al, 1 ; BIT0 ; Variable Rate Audio bit
  2594 000143AE 7424                <1> 	jz	short vra_not_supported
  2595                              <1> 
  2596 000143B0 668B15[74890100]    <1> 	mov    	dx, [NAMBAR]               	
  2597 000143B7 6683C22A            <1> 	add    	dx, CODEC_EXT_AUDIO_CTRL_REG ; 2Ah  	  
  2598 000143BB 66ED                <1> 	in     	ax, dx
  2599 000143BD 24FD                <1> 	and	al, ~BIT1 ; Clear DRA
  2600 000143BF 0C01                <1> 	or	al, AC97_EA_VRA ; 1 ; 04/11/2023
  2601 000143C1 66EF                <1> 	out	dx, ax			; Enable variable rate audio
  2602                              <1> 
  2603                              <1> 	;mov	ecx, 10
  2604                              <1> 	; 21/11/2023
  2605 000143C3 B10A                <1> 	mov	cl, 10
  2606                              <1> check_vra:
  2607 000143C5 51                  <1> 	push	ecx
  2608 000143C6 E8DBF8FFFF          <1> 	call	delay_100ms
  2609 000143CB 59                  <1> 	pop	ecx
  2610                              <1> 
  2611 000143CC 66ED                <1> 	in	ax, dx
  2612 000143CE A801                <1> 	test	al, AC97_EA_VRA ; 1
  2613 000143D0 7508                <1> 	jnz	short vra_ok
  2614                              <1> 
  2615 000143D2 E2F1                <1> 	loop	check_vra
  2616                              <1> 
  2617                              <1> vra_not_supported:	; 24/11/2023
  2618                              <1> 	; VRA is not usable
  2619                              <1> 	;mov	byte [VRA], 0
  2620 000143D4 FE0D[A4890100]      <1> 	dec	byte [VRA]
  2621                              <1> vra_ok:
  2622                              <1> 	; 20/11/2023
  2623                              <1> 	; 19/11/2023 - TRDOS 386 v2.0.7
  2624                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  2625                              <1> 	; 22/07/2020
  2626                              <1> 	; 10/06/2017
  2627                              <1> 	; 29/05/2017
  2628                              <1> 
  2629                              <1> 	;mov     eax, 0202h
  2630                              <1> 	; 21/11/2023
  2631                              <1> 	;mov	eax, 0B0Bh
  2632                              <1> 	; 23/11/2023
  2633 000143DA B81D1D0000          <1> 	mov	eax, 1D1Dh
  2634 000143DF 66A3[A8890100]      <1> 	mov	[audio_master_volume], ax
  2635                              <1> 	;mov	ax, 1F1Fh ; 31, 31
  2636                              <1> 
  2637                              <1> 	; 21/11/2023
  2638                              <1> 	;push	eax
  2639                              <1> 	
  2640                              <1> 	; 20/11/2023
  2641                              <1> 	;mov	ax, 0B0Bh
  2642                              <1> 	; 23/11/2023
  2643 000143E5 66B80202            <1> 	mov	ax, 0202h
  2644                              <1> 
  2645 000143E9 668B15[74890100]    <1>   	mov     dx, [NAMBAR]
  2646 000143F0 6683C202            <1>   	add     dx, CODEC_MASTER_VOL_REG	;02h 
  2647                              <1> 	;xor	ax, ax 	; volume attenuation = 0 (max. volume)
  2648                              <1> 	; 06/08/2022
  2649                              <1> 	;xor	eax, eax
  2650                              <1> 	; 19/11/2023
  2651 000143F4 66EF                <1> 	out     dx, ax
  2652                              <1> 
  2653                              <1> 	; 20/11/2023
  2654 000143F6 E8B8F8FFFF          <1>         call    delay1_4ms
  2655 000143FB E8B3F8FFFF          <1>         call    delay1_4ms
  2656 00014400 E8AEF8FFFF          <1>         call    delay1_4ms
  2657 00014405 E8A9F8FFFF          <1>         call    delay1_4ms
  2658                              <1> 	; 21/11/2023 temporary
  2659                              <1> 	;call	delay_100ms
  2660                              <1> 
  2661                              <1> 	; 21/11/2023
  2662                              <1> 	;pop	eax
  2663                              <1> 	
  2664                              <1> 	; 23/11/2023
  2665                              <1> 	; 21/11/2023
  2666                              <1> 	;mov	ax, 0202h
  2667                              <1> 
  2668 0001440A 668B15[74890100]    <1>   	mov     dx, [NAMBAR]
  2669 00014411 6683C218            <1>   	add     dx, CODEC_PCM_OUT_REG		;18h 
  2670                              <1>   	;xor    ax, ax
  2671 00014415 66EF                <1>   	out     dx, ax
  2672                              <1> 
  2673                              <1> 	; 20/11/2023
  2674 00014417 E897F8FFFF          <1>         call    delay1_4ms
  2675 0001441C E892F8FFFF          <1>         call    delay1_4ms
  2676 00014421 E88DF8FFFF          <1>         call    delay1_4ms
  2677 00014426 E888F8FFFF          <1>         call    delay1_4ms
  2678                              <1> 	; 21/11/2023 - temporary
  2679                              <1> 	;call	delay_100ms
  2680                              <1> 
  2681                              <1> ; 23/11/2023
  2682                              <1> %if 0
  2683                              <1>   	mov     dx, [NAMBAR]
  2684                              <1>   	add     dx, CODEC_MASTER_MONO_VOL_REG	;06h 
  2685                              <1> 	;xor	ax, ax
  2686                              <1>   	out     dx, ax
  2687                              <1> 
  2688                              <1>   	mov     dx, [NAMBAR]
  2689                              <1>   	add     dx, CODEC_PCBEEP_VOL_REG	;0Ah 
  2690                              <1>   	;xor    ax, ax
  2691                              <1>   	out     dx, ax
  2692                              <1> 
  2693                              <1> 	mov     ax, 8008h ; Mute
  2694                              <1>   	mov     dx, [NAMBAR]
  2695                              <1> 	; 22/07/2020
  2696                              <1> 	add	dx, CODEC_PHONE_VOL_REG		;0Ch
  2697                              <1> 				 ; AC97_PHONE_VOL ; TAD Input (Mono)
  2698                              <1>   	out     dx, ax
  2699                              <1> 
  2700                              <1>         mov	ax, 0808h
  2701                              <1>   	mov     dx, [NAMBAR]
  2702                              <1>         add	dx, CODEC_LINE_IN_VOL_REG ;10h ; Line Input (Stereo)
  2703                              <1>   	out     dx, ax
  2704                              <1> 
  2705                              <1> 	;mov	ax, 0808h
  2706                              <1>   	mov     dx, [NAMBAR]
  2707                              <1>         add	dx, CODEC_CD_VOL_REG ;12h ; CR Input (Stereo)
  2708                              <1>   	out     dx, ax
  2709                              <1> 
  2710                              <1> 	;mov	ax, 0808h
  2711                              <1>   	mov     dx, [NAMBAR]
  2712                              <1>         add	dx, CODEC_AUX_VOL_REG ;16h ; Aux Input (Stereo)
  2713                              <1>   	out     dx, ax
  2714                              <1> 
  2715                              <1>         ;call    delay1_4ms
  2716                              <1>         ;call    delay1_4ms
  2717                              <1>         ;call    delay1_4ms
  2718                              <1>         ;call    delay1_4ms
  2719                              <1> 
  2720                              <1> 	; 21/11/2023 - temporary
  2721                              <1> 	call	delay_100ms
  2722                              <1> %endif
  2723                              <1> 
  2724                              <1> set_volume_ok:
  2725                              <1> 
  2726                              <1> ;detect_ac97_codec:
  2727 0001442B C3                  <1> 	retn
  2728                              <1> 
  2729                              <1> set_ac97_bdl: ; Set AC97 (ICH) Buffer Descriptor List
  2730                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  2731                              <1> 	; 17/06/2017
  2732                              <1> 	; 11/06/2017
  2733                              <1> 	; 28/05/2017
  2734                              <1> 	; eax = dma buffer address = [audio_DMA_buff]
  2735                              <1> 	; ecx = dma buffer buffer size = [audio_dmabuff_size]
  2736                              <1> 
  2737 0001442C D1E9                <1> 	shr	ecx, 1 ; dma half buffer size
  2738 0001442E 89CE                <1> 	mov	esi, ecx
  2739                              <1> 
  2740 00014430 BF[AC890100]        <1>         mov     edi, audio_bdl_buff	; get BDL address
  2741                              <1> 	;mov	ecx, 32 / 2		; make 32 entries in BDL
  2742                              <1> 	; 06/08/2022
  2743 00014435 29C9                <1> 	sub	ecx, ecx
  2744 00014437 B110                <1> 	mov	cl, 16
  2745                              <1> 
  2746 00014439 EB05                <1> 	jmp	short s_ac97_bdl1 
  2747                              <1> 
  2748                              <1> s_ac97_bdl0:
  2749                              <1> 	; set buffer descriptor 0 to start of data file in memory
  2750                              <1> 
  2751 0001443B A1[90890100]        <1>  	mov	eax, [audio_dma_buff]	; Physical address of DMA buffer
  2752                              <1>  
  2753                              <1> s_ac97_bdl1:
  2754 00014440 AB                  <1> 	stosd				; store dmabuffer1 address
  2755                              <1> 
  2756 00014441 89C2                <1> 	mov	edx, eax
  2757                              <1> 
  2758                              <1> ;
  2759                              <1> ; Buffer Descriptors List
  2760                              <1> ; As stated earlier, each buffer descriptor list is a set of (up to) 32 
  2761                              <1> ; descriptors, each 8 bytes in length. Bytes 0-3 of a descriptor entry point
  2762                              <1> ; to a chunk of memory to either play from or record to. Bytes 4-7 of an
  2763                              <1> ; entry describe various control things detailed below.
  2764                              <1> ; 
  2765                              <1> ; Buffer pointers must always be aligned on a Dword boundry.
  2766                              <1> ;
  2767                              <1> 
  2768                              <1> ;IOC	equ     BIT31			; Fire an interrupt whenever this
  2769                              <1> 					; buffer is complete.
  2770                              <1> 
  2771                              <1> ;BUP	equ     BIT30			; Buffer Underrun Policy.
  2772                              <1> 					; if this buffer is the last buffer
  2773                              <1> 					; in a playback, fill the remaining
  2774                              <1> 					; samples with 0 (silence) or not.
  2775                              <1>   					; It's a good idea to set this to 1
  2776                              <1> 					; for the last buffer in playback,
  2777                              <1> 					; otherwise you're likely to get a lot
  2778                              <1> 					; of noise at the end of the sound.
  2779                              <1> 
  2780                              <1> ;
  2781                              <1> ; Bits 15:0 contain the length of the buffer, in number of samples, which
  2782                              <1> ; are 16 bits each, coupled in left and right pairs, or 32bits each.
  2783                              <1> ; Luckily for us, that's the same format as .wav files.
  2784                              <1> ;
  2785                              <1> ; A value of FFFF is 65536 samples. Running at 44.1Khz, that's just about
  2786                              <1> ; 1.5 seconds of sample time. FFFF * 32bits is 1FFFFh bytes or 128k of data.
  2787                              <1> ;
  2788                              <1> ; A value of 0 in these bits means play no samples.
  2789                              <1> ;
  2790                              <1> 
  2791 00014443 89F0                <1> 	mov	eax, esi ; DMA half buffer size
  2792 00014445 01C2                <1> 	add	edx, eax
  2793 00014447 D1E8                <1> 	shr	eax, 1	; count of 16 bit samples
  2794                              <1> 	; 19/11/2023
  2795 00014449 0D000000C0          <1> 	or	eax, IOC+BUP
  2796                              <1> 	;or	eax, IOC ; 11/06/2017
  2797 0001444E AB                  <1> 	stosd
  2798                              <1> 
  2799                              <1> ; 2nd buffer:
  2800                              <1> 
  2801 0001444F 89D0                <1>         mov	eax, edx ; Physical address of the 2nd half of DMA buffer	
  2802 00014451 AB                  <1> 	stosd		 ; store dmabuffer2 address
  2803                              <1> 
  2804                              <1> ; set length to [audio_dmabuff_size]/2
  2805                              <1> ; Set control (bits 31:16) to BUP, bits 15:0=number of samples
  2806                              <1> ; 
  2807 00014452 89F0                <1> 	mov	eax, esi ; DMA half buffer size
  2808 00014454 D1E8                <1> 	shr	eax, 1 ; count of 16 bit samples
  2809                              <1> 	; 19/11/2023
  2810 00014456 0D000000C0          <1> 	or	eax, IOC+BUP
  2811                              <1> 	;or	eax, IOC ; 11/06/2017
  2812 0001445B AB                  <1> 	stosd
  2813                              <1> 
  2814 0001445C E2DD                <1> 	loop    s_ac97_bdl0
  2815                              <1> 	
  2816 0001445E C3                  <1> 	retn
  2817                              <1> 
  2818                              <1> ac97_start_play:
  2819                              <1> 	; 26/11/2023
  2820                              <1> 	; 20/11/2023  
  2821                              <1> 	; 19/11/2023 - TRDOS 386 v2.0.7
  2822                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  2823                              <1> 	; 28/05/2017
  2824                              <1> 	; Derived from 'playWav' procedure in 'ICHWAV.ASM'
  2825                              <1> 	; .wav player for DOS by Jeff Leyda (02/09/2002)
  2826                              <1> 
  2827                              <1> 	; set output rate
  2828                              <1> 	; entry: [audio_freq] = desired sample rate
  2829                              <1> 
  2830                              <1> 	; 21/11/2023 - temporary
  2831                              <1> 	;call	ac97_codec_config
  2832                              <1> 
  2833                              <1> ; 20/11/2023
  2834                              <1> %if 0
  2835                              <1> 	AC97_EA_VRA equ 0001h ; 04/11/2023
  2836                              <1> 		
  2837                              <1> 	mov    	dx, [NAMBAR]               	
  2838                              <1> 	add    	dx, CODEC_EXT_AUDIO_CTRL_REG  	; 2Ah
  2839                              <1> 	in     	ax, dx
  2840                              <1> 	and	al, ~BIT1 ; Clear DRA
  2841                              <1> 	or	al, AC97_EA_VRA ; 1 ; 04/11/2023
  2842                              <1> 	out	dx, ax			; Enable variable rate audio
  2843                              <1> 
  2844                              <1>        ;call    delay1_4ms
  2845                              <1>        ;call    delay1_4ms
  2846                              <1>        ;call    delay1_4ms
  2847                              <1>        ;call    delay1_4ms
  2848                              <1> %endif
  2849                              <1> 
  2850                              <1> 	; 26/11/2023
  2851                              <1> 	; 24/11/2023 - temporary
  2852                              <1> 	;mov	ax, 48000
  2853                              <1> 
  2854                              <1> 	; 20/11/2023
  2855 0001445F 803D[A4890100]01    <1> 	cmp	byte [VRA], 1
  2856 00014466 7218                <1> 	jb	short skip_set_rate
  2857                              <1> 
  2858 00014468 66A1[A2890100]      <1> 	mov	ax, [audio_freq]		; sample rate
  2859                              <1> 
  2860                              <1> ;skip_set_rate:	; 24/11/2023
  2861 0001446E 668B15[74890100]    <1> 	mov    	dx, [NAMBAR]               	
  2862 00014475 6683C22C            <1> 	add    	dx, CODEC_PCM_FRONT_DACRATE_REG	; 2Ch  	  
  2863 00014479 66EF                <1> 	out	dx, ax 				; out sample rate
  2864                              <1> 	
  2865                              <1> 	; 27/11/2023	
  2866                              <1> 	;call	delay1_4ms
  2867                              <1> 	;call	delay1_4ms
  2868                              <1> 	;call	delay1_4ms
  2869                              <1> 	;call	delay1_4ms
  2870                              <1> 	; 27/11/2023 - temporary
  2871 0001447B E826F8FFFF          <1> 	call	delay_100ms
  2872                              <1> 
  2873                              <1> 	; 26/11/2023
  2874                              <1> skip_set_rate:	; 20/11/2023
  2875                              <1> 
  2876                              <1> 	;; 23/11/2023 - temporary
  2877                              <1> 	;push	ebx
  2878                              <1> 	;mov	ebx, 0B8000h
  2879                              <1> 	;mov	al, 'x'
  2880                              <1> 	;mov	ah, 4Eh
  2881                              <1> 	;mov	[ebx], ax
  2882                              <1> 	;pop	ebx
  2883                              <1> 
  2884                              <1> ;
  2885                              <1> ; register reset the DMA engine. This may cause a pop noise on the output
  2886                              <1> ; lines when the device is reset. Prolly a better idea to mute output, then
  2887                              <1> ; reset.
  2888                              <1> ;
  2889                              <1> 	;; 21/11/2023 - temporary
  2890                              <1> 	;; 20/11/2023
  2891                              <1> 	;mov	dx, [NABMBAR]
  2892                              <1> 	;add	dx, PO_CR_REG			; set pointer to Cntl reg
  2893                              <1> 	;mov	al, RR				; set reset
  2894                              <1> 	;out	dx, al				; self clearing bit
  2895                              <1> 
  2896                              <1> 	; 23/11/2023 - temporary
  2897                              <1> 	;call	delay_100ms
  2898                              <1> 
  2899                              <1> ;	mov	edi, audio_bdl_buff
  2900                              <1> ;	mov	edx, [audio_dmabuff_size]
  2901                              <1> ;	shr	edx, 1
  2902                              <1> ;	mov	ecx, 32/2
  2903                              <1> ;ac97_set_bdl_buffer:
  2904                              <1> ;	; 1st half of DMA buffer
  2905                              <1> ;	mov	eax, [audio_dma_buff]
  2906                              <1> ;	push	eax
  2907                              <1> ;	stosd
  2908                              <1> ;	mov	eax, edx ; dma buffer size / 2
  2909                              <1> ;	or	eax, IOC+BUP
  2910                              <1> ;	stosd
  2911                              <1> ;	pop	eax
  2912                              <1> ;	; 2nd half of DMA buffer
  2913                              <1> ;	add	eax, edx
  2914                              <1> ;	stosd
  2915                              <1> ;	mov	eax, edx ; dma buffer size / 2
  2916                              <1> ;	or	eax, IOC+BUP
  2917                              <1> ;	stosd
  2918                              <1> ;	loop	ac97_set_bdl_buffer
  2919                              <1>  	
  2920                              <1> ; tell the DMA engine where to find our list of Buffer Descriptors.
  2921                              <1> ; this 32bit value is a flat mode memory offset (ie no segment:offset)
  2922                              <1> ;
  2923                              <1> ; write NABMBAR+10h with offset of buffer descriptor list
  2924                              <1> ;
  2925 00014480 B8[AC890100]        <1>         mov	eax, audio_bdl_buff
  2926 00014485 668B15[76890100]    <1> 	mov	dx, [NABMBAR]
  2927 0001448C 6683C210            <1> 	add	dx, PO_BDBAR_REG
  2928 00014490 EF                  <1> 	out	dx, eax
  2929                              <1> 
  2930                              <1> 	; 23/11/2023 - temporary
  2931 00014491 E810F8FFFF          <1> 	call	delay_100ms
  2932                              <1> ;
  2933                              <1> ; All set. Let's play some music.
  2934                              <1> ;
  2935                              <1> 	;mov	eax, 31
  2936                              <1> 	; 06/08/2022
  2937 00014496 29C0                <1> 	sub	eax, eax
  2938 00014498 B01F                <1> 	mov	al, 31
  2939 0001449A E81B000000          <1> 	call    set_ac97_LastValidIndex
  2940                              <1> 
  2941                              <1> 	; 23/11/2023 - temporary
  2942 0001449F E802F8FFFF          <1> 	call	delay_100ms
  2943                              <1> 
  2944 000144A4 C605[A6890100]01    <1> 	mov	byte [audio_play_cmd], 1 ; play command (do not stop) !
  2945                              <1> 
  2946                              <1> ac97_play: ; continue to play (after pause)
  2947                              <1> 	; 11/06/2017
  2948                              <1> 	; 29/05/2017
  2949                              <1> 	; 28/05/2017
  2950 000144AB 668B15[76890100]    <1>         mov     dx, [NABMBAR]
  2951 000144B2 6683C21B            <1>         add     dx, PO_CR_REG		; PCM out control register
  2952                              <1> 	; 26/11/2023
  2953 000144B6 B011                <1> 	mov	al, IOCE+RPBM ; 29/05/2017
  2954                              <1> 	; 24/11/2023
  2955                              <1> 	;mov	al, 1Dh ; (Ref: KolibriOS, intelac97.asm, 'play:')
  2956 000144B8 EE                  <1> 	out     dx, al			; set start!
  2957                              <1> 
  2958                              <1> 	;mov	byte [audio_play_cmd], 1 ; play command (do not stop) !
  2959                              <1> 
  2960                              <1> 	; 24/11/2023 - temporary
  2961                              <1> 	;mov	ax, 0202h	
  2962                              <1> 	;mov	dx, [NAMBAR]
  2963                              <1>   	;add	dx, CODEC_MASTER_VOL_REG  ; 02h ; Line Out 
  2964                              <1>   	;out	dx, ax
  2965                              <1> 	;mov	ax, 0202h	
  2966                              <1> 	;mov	dx, [NAMBAR]
  2967                              <1>   	;add	dx, CODEC_PCM_OUT_REG ; 18h ; PCM Out 
  2968                              <1>   	;out	dx, ax
  2969                              <1> 
  2970 000144B9 C3                  <1> 	retn
  2971                              <1> 
  2972                              <1> ;input AL = index # to stop on
  2973                              <1> set_ac97_LastValidIndex:
  2974                              <1> 	; 28/05/2017
  2975                              <1> 	; Derived from 'setLastValidIndex' procedure in 'ICHWAV.ASM'
  2976                              <1> 	; .wav player for DOS by Jeff Leyda (02/09/2002)
  2977 000144BA 668B15[76890100]    <1> 	mov	dx, [NABMBAR]
  2978 000144C1 6683C215            <1> 	add	dx, PO_LVI_REG
  2979 000144C5 EE                  <1>         out     dx, al
  2980                              <1> 	;mov	[audio_lvi], al ; for ac97_int_handler
  2981 000144C6 C3                  <1> 	retn
  2982                              <1> 
  2983                              <1> ac97_volume:
  2984                              <1> 	; 28/05/2017
  2985                              <1> 	; bl = component (0 = master/playback/lineout volume)
  2986                              <1> 	; cl = left channel volume level (0 to 31)
  2987                              <1> 	; ch = right channel volume level (0 to 31)
  2988                              <1> 
  2989 000144C7 08DB                <1> 	or	bl, bl
  2990 000144C9 7523                <1> 	jnz	short ac97_vol_1 ; temporary !
  2991 000144CB 66B81F1F            <1> 	mov	ax, 1F1Fh ; 31,31
  2992 000144CF 38C1                <1> 	cmp	cl, al
  2993 000144D1 771B                <1> 	ja	short ac97_vol_1 ; temporary !
  2994 000144D3 38E5                <1> 	cmp	ch, ah
  2995 000144D5 7717                <1> 	ja	short ac97_vol_1 ; temporary !
  2996 000144D7 66890D[A8890100]    <1> 	mov	[audio_master_volume], cx
  2997 000144DE 6629C8              <1> 	sub	ax, cx
  2998 000144E1 668B15[74890100]    <1>   	mov     dx, [NAMBAR]
  2999 000144E8 6683C202            <1>   	add     dx, CODEC_MASTER_VOL_REG  ; 02h ; Line Out 
  3000 000144EC 66EF                <1>   	out     dx, ax
  3001                              <1> ac97_vol_1:
  3002                              <1> 	; 21/11/2023
  3003                              <1> _ac97_ih5:	; 06/08/2022
  3004 000144EE C3                  <1> 	retn
  3005                              <1> 
  3006                              <1> ac97_int_handler:
  3007                              <1> 	; 27/11/2023
  3008                              <1> 	; 24/11/2023
  3009                              <1> 	; 21/11/2023
  3010                              <1> 	; 20/11/2023 - TRDOS 386 v2.0.7
  3011                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  3012                              <1> 	; 12/10/2017
  3013                              <1> 	; 10/10/2017
  3014                              <1> 	; 09/10/2017
  3015                              <1> 	; 13/06/2017, 13/06/2017
  3016                              <1> 	; 10/06/2017, 11/06/2017
  3017                              <1> 	; Interrupt Handler for AC97 (ICH) Audio Controller
  3018                              <1> 	; Note: called by 'dev_IRQ_service' 
  3019                              <1> 	; 28/05/2017
  3020                              <1> 
  3021                              <1> 	;push	eax ; * must be saved !
  3022                              <1> 	;push	edx
  3023                              <1> 	;push	ecx
  3024                              <1> 	;push	ebx ; * must be saved !
  3025                              <1> 	;push	esi
  3026                              <1> 	;push	edi
  3027                              <1> 
  3028                              <1> 	;cmp	byte [audio_busy], 1
  3029                              <1> 	;jnb	_ac97_ih2 ; busy !
  3030                              <1> 
  3031                              <1> 	; 24/11/2023
  3032                              <1>         ;mov	dx, [NABMBAR]
  3033                              <1> 	;mov	dx, PO_SR_REG
  3034                              <1> 	;in	ax, dx
  3035                              <1> 	;test	al, BCIS ; bit 3, 8
  3036                              <1> 	;jz	short _ac97_ih5
  3037                              <1> 
  3038                              <1> 	; 24/11/2023
  3039 000144EF 66BA3000            <1> 	mov	dx, GLOB_STS_REG
  3040 000144F3 660315[76890100]    <1>         add	dx, [NABMBAR]
  3041 000144FA ED                  <1> 	in	eax, dx
  3042                              <1> 
  3043 000144FB 83F8FF              <1> 	cmp	eax, 0FFFFFFFFh ; -1
  3044                              <1> 	;je	_ac97_ih3 ; exit
  3045                              <1> 	; 06/08/2022
  3046 000144FE 74EE                <1> 	je	short _ac97_ih5
  3047                              <1> 
  3048                              <1> 	;test	eax, 40h ; PCM Out Interrupt
  3049                              <1> 	; 06/08/2022
  3050 00014500 A840                <1> 	test	al, 40h
  3051 00014502 7506                <1> 	jnz	short _ac97_ih0
  3052                              <1> 
  3053                              <1> 	; 24/11/2023
  3054 00014504 85C0                <1> 	test	eax, eax
  3055                              <1> 	;jz	_ac97_ih3 ; exit
  3056                              <1> 	; 06/08/2022
  3057 00014506 74E6                <1> 	jz	short _ac97_ih5
  3058                              <1> 
  3059                              <1>  	;mov	dx, GLOB_STS_REG
  3060                              <1>         ;add	dx, [NABMBAR]
  3061 00014508 EF                  <1> 	out	dx, eax
  3062                              <1> 	
  3063                              <1> 	;jmp	_ac97_ih3 ; exit
  3064                              <1> 	
  3065                              <1> 	; 06/08/2022
  3066 00014509 C3                  <1> 	retn
  3067                              <1> 	; 21/11/2023
  3068                              <1> 	;jmp	short _ac97_ih5
  3069                              <1> 
  3070                              <1> _ac97_ih0:
  3071                              <1> 	; 24/11/2023
  3072                              <1> 	;push	eax
  3073                              <1> 	; 09/10/2017
  3074 0001450A 803D[A6890100]01    <1> 	cmp	byte [audio_play_cmd], 1
  3075                              <1> 	;jb	short _ac97_ih4 ; stop command !
  3076                              <1> 	; 24/11/2023
  3077 00014511 7333                <1> 	jnb	short _ac97_ih4
  3078                              <1> 
  3079                              <1> 	;mov	dx, GLOB_STS_REG
  3080                              <1>         ;add	dx, [NABMBAR]
  3081 00014513 EF                  <1> 	out	dx, eax
  3082                              <1> 	;jmp	short _ac97_stop
  3083                              <1> 
  3084                              <1> 	; 24/11/2023
  3085                              <1> ac97_stop: 
  3086                              <1> 	; 28/05/2017
  3087 00014514 C605[A6890100]00    <1> 	mov	byte [audio_play_cmd], 0 ; stop !
  3088                              <1> _ac97_stop: ; 09/10/2017
  3089                              <1> 	; 29/05/2017
  3090                              <1> 	;mov	dx, [NABMBAR]
  3091                              <1> 	;add	dx, PO_CR_REG
  3092                              <1> 	;mov	al, 0
  3093                              <1> 	;out	dx, al
  3094                              <1> 
  3095                              <1> 	; 11/06/2017
  3096 0001451B 30C0                <1> 	xor	al, al ; 0
  3097 0001451D E813000000          <1> 	call	ac97_po_cmd
  3098                              <1> 
  3099                              <1> 	; (Ref: KolibriOS, intelac97.asm, 'stop:')
  3100                              <1> 	; Clear FIFOE, BCIS, LVBCI (Ref: Intel ICH hub manual)
  3101 00014522 66B81C00            <1> 	mov     ax, 1Ch
  3102 00014526 668B15[76890100]    <1> 	mov     dx, [NABMBAR]
  3103 0001452D 6683C216            <1> 	add     dx, PO_SR_REG
  3104 00014531 66EF                <1> 	out     dx, ax
  3105                              <1> 
  3106                              <1> 	;retn
  3107                              <1> 
  3108                              <1> 	; 11/06/2017
  3109 00014533 B002                <1> 	mov     al, RR
  3110                              <1> ac97_po_cmd:
  3111                              <1> 	 ;11/06/2017
  3112                              <1> 	; 29/05/2017
  3113 00014535 668B15[76890100]    <1> 	mov     dx, [NABMBAR]
  3114 0001453C 6683C21B            <1>         add     dx, PO_CR_REG		; PCM out control register
  3115 00014540 EE                  <1> 	out	dx, al
  3116 00014541 C3                  <1> 	retn
  3117                              <1> 
  3118                              <1> ac97_pause:
  3119                              <1> 	; 11/06/2017
  3120                              <1> 	; 29/05/2017
  3121 00014542 B010                <1> 	mov 	al, IOCE
  3122 00014544 EBEF                <1> 	jmp	short ac97_po_cmd
  3123                              <1> 
  3124                              <1> _ac97_ih4:
  3125                              <1> 	;mov	byte [audio_busy], 1
  3126                              <1> 
  3127                              <1> 	; 24/11/2023
  3128 00014546 50                  <1> 	push	eax
  3129                              <1> 
  3130 00014547 66B81C00            <1> 	mov	ax, 1Ch ; FIFOE(=16)+BCIS(=8)+LVBCI(=4)
  3131 0001454B 66BA1600            <1> 	mov	dx, PO_SR_REG
  3132 0001454F 660315[76890100]    <1>         add	dx, [NABMBAR]
  3133 00014556 66EF                <1> 	out	dx, ax
  3134                              <1> 
  3135 00014558 66BA1400            <1> 	mov	dx, PO_CIV_REG
  3136 0001455C 660315[76890100]    <1>         add	dx, [NABMBAR]
  3137 00014563 EC                  <1> 	in	al, dx
  3138                              <1> 
  3139                              <1> 	;cmp	al, [audio_civ] ; [audio_flag]
  3140                              <1> 	;je	short _ac97_ih2
  3141                              <1> 
  3142                              <1> 	; 21/11/2023
  3143                              <1> 	;mov	[audio_civ], al
  3144                              <1> 	; 20/11/2023
  3145 00014564 88C4                <1> 	mov	ah, al
  3146 00014566 FEC8                <1> 	dec	al
  3147                              <1> 	;inc	al ; 11/06/2017
  3148 00014568 241F                <1> 	and	al, 1Fh
  3149                              <1> 
  3150 0001456A 66BA1500            <1>         mov     dx, PO_LVI_REG
  3151 0001456E 660315[76890100]    <1>         add	dx, [NABMBAR]
  3152 00014575 EE                  <1>         out	dx, al
  3153                              <1> 
  3154                              <1> 	; 12/10/2017
  3155                              <1> 	;mov	al, [audio_civ]
  3156                              <1> 	;inc	al
  3157                              <1> 	;and	al, 1
  3158                              <1> 	;mov	[audio_flag], al 
  3159                              <1> 	; 27/11/2023
  3160                              <1> 	; 20/11/2023
  3161                              <1> 	;inc	ah
  3162 00014576 80E401              <1> 	and	ah, 1
  3163 00014579 8825[98890100]      <1> 	mov	[audio_flag], ah
  3164                              <1> 	
  3165                              <1> 	;; [audio_flag] : 0 = Buffer 1, 1 = Buffer 2
  3166                              <1> 	;
  3167                              <1> 	; 21/11/2023
  3168                              <1> 	;call	ac97_tuneloop
  3169                              <1> 
  3170                              <1> 	; 24/11/2023
  3171                              <1> ac97_tuneloop:
  3172                              <1> 	; 09/10/2017
  3173 0001457F 8B3D[90890100]      <1> 	mov	edi, [audio_dma_buff]
  3174 00014585 8B0D[94890100]      <1> 	mov	ecx, [audio_dmabuff_size]
  3175 0001458B D1E9                <1> 	shr	ecx, 1 ; dma buff size / 2 = half buffer size
  3176                              <1> 
  3177                              <1> 	; 12/10/2017
  3178 0001458D 803D[98890100]00    <1> 	cmp 	byte [audio_flag], 0
  3179 00014594 7702                <1> 	ja	short _ac97_ih1  ; Playing Half Buffer 2 (Current: FLAG)
  3180                              <1> 	; Playing Half Buffer 1 (Current: EOL)	
  3181 00014596 01CF                <1> 	add	edi, ecx
  3182                              <1> _ac97_ih1: 
  3183                              <1> 	; Update half buffer 2 while playing half buffer 1 (next: FLAG)
  3184                              <1> 	; Update half buffer 1 while playing half buffer 2 (next: EOL)
  3185                              <1> 
  3186 00014598 8B35[88890100]      <1> 	mov	esi, [audio_p_buffer] ; phy addr of audio buff
  3187 0001459E C1E902              <1> 	shr	ecx, 2 ; half buff size / 4
  3188 000145A1 F3A5                <1> 	rep	movsd 
  3189                              <1> 
  3190                              <1> 	; 10/10/2017
  3191                              <1> 	; switch flag value
  3192 000145A3 8035[98890100]01    <1> 	xor	byte [audio_flag], 1
  3193                              <1> 
  3194                              <1> 	; 27/11/2023
  3195                              <1> 	; 21/11/2023 - temporary
  3196                              <1> 	;push	ebx
  3197                              <1> 	;mov	ebx, 0B8002h
  3198                              <1> 	;mov	al, [audio_flag]
  3199                              <1> 	;add	al, '1'
  3200                              <1> 	;mov	ah, 0Fh
  3201                              <1> 	;mov	[ebx], ax
  3202                              <1> 	;pop	ebx
  3203                              <1> 	
  3204                              <1> 	; 12/10/2017
  3205                              <1> 	; [audio_flag] = 0 : Playing dma half buffer 2 (even index value)
  3206                              <1> 			   ; Next buffer (to update) is dma half buff 1
  3207                              <1> 	; 	       = 1 : Playing dma half buffer 1 (odd index value)
  3208                              <1> 			   ; Next buffer (to update) is dma half buff 2
  3209                              <1> 	; 24/11/2023
  3210                              <1> 	;retn
  3211                              <1> 
  3212                              <1> 	;
  3213                              <1> 	; 24/11/2023
  3214 000145AA 58                  <1> 	pop	eax
  3215                              <1> 	; 24/11/2023
  3216                              <1> 	; 20/11/2023
  3217                              <1> 	;and	eax, 40h
  3218 000145AB 668B15[76890100]    <1>         mov	dx, [NABMBAR]
  3219 000145B2 6683C230            <1> 	add	dx, GLOB_STS_REG
  3220 000145B6 EF                  <1> 	out	dx, eax
  3221                              <1> 
  3222                              <1> 	;; 13/06/2017
  3223                              <1> 	;mov	al, 11h ; IOCE + RPBM
  3224                              <1> 	;mov	dx, PO_CR_REG
  3225                              <1>         ;add	dx, [NABMBAR]
  3226                              <1> 	;out	dx, al
  3227                              <1> 
  3228                              <1> 	; 24/11/2023
  3229                              <1> 	;mov	dx, [NABMBAR]
  3230                              <1> 	;add	dx, PO_SR_REG	; set pointer to Status reg
  3231                              <1> 	;mov	ax, 1Ch
  3232                              <1> 	;out	dx, ax
  3233                              <1> 
  3234                              <1> 	; 24/11/2023	
  3235                              <1> _ac97_ih2:
  3236                              <1> 	;mov	byte [audio_busy], 0
  3237                              <1> _ac97_ih3:
  3238                              <1> 	;pop	edi
  3239                              <1> 	;pop	esi
  3240                              <1> 	;pop	ebx ; * must be restored !
  3241                              <1> 	;pop	ecx
  3242                              <1> 	;pop	edx
  3243                              <1> 	;pop	eax ; * must be restored !
  3244                              <1> 
  3245 000145B7 C3                  <1> 	retn
  3246                              <1> 
  3247                              <1> reset_ac97_controller:
  3248                              <1> 	; 10/06/2017
  3249                              <1> 	; 29/05/2017
  3250                              <1> 	; 28/05/2017
  3251                              <1> 	; reset AC97 audio controller registers
  3252 000145B8 31C0                <1> 	xor     eax, eax
  3253 000145BA 66BA0B00            <1>         mov	dx, PI_CR_REG
  3254 000145BE 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3255 000145C5 EE                  <1> 	out     dx, al
  3256                              <1> 
  3257 000145C6 66BA1B00            <1>         mov     dx, PO_CR_REG
  3258 000145CA 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3259 000145D1 EE                  <1> 	out     dx, al
  3260                              <1> 
  3261 000145D2 66BA2B00            <1>         mov     dx, MC_CR_REG
  3262 000145D6 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3263 000145DD EE                  <1> 	out     dx, al
  3264                              <1> 
  3265 000145DE B002                <1>         mov     al, RR
  3266 000145E0 66BA0B00            <1>         mov     dx, PI_CR_REG
  3267 000145E4 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3268 000145EB EE                  <1> 	out     dx, al
  3269                              <1> 
  3270 000145EC 66BA1B00            <1>         mov     dx, PO_CR_REG
  3271 000145F0 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3272 000145F7 EE                  <1> 	out     dx, al
  3273                              <1> 
  3274 000145F8 66BA2B00            <1>         mov     dx, MC_CR_REG
  3275 000145FC 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3276 00014603 EE                  <1> 	out     dx, al
  3277                              <1> 
  3278 00014604 C3                  <1> 	retn
  3279                              <1> 
  3280                              <1> ac97_reset:
  3281                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  3282                              <1> 	; 10/06/2017
  3283                              <1> 	; 29/05/2017
  3284                              <1> 	; 28/05/2017
  3285 00014605 E8AEFFFFFF          <1> 	call	reset_ac97_controller
  3286                              <1> 	; 29/05/2017
  3287                              <1> 	;jmp	reset_ac97_codec
  3288                              <1> reset_ac97_codec:
  3289                              <1> 	; 28/05/2017 - Erdogan Tan (Ref: KolibriOS, intelac97.asm)
  3290 0001460A 66BA2C00            <1> 	mov	dx, GLOB_CNT_REG ; 2Ch
  3291 0001460E 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3292 00014615 ED                  <1> 	in	eax, dx
  3293                              <1> 
  3294                              <1> 	;test	eax, 2
  3295                              <1> 	; 06/08/2022
  3296 00014616 A802                <1> 	test	al, 2
  3297 00014618 7407                <1> 	jz	short _r_ac97codec_cold	
  3298                              <1> 
  3299 0001461A E80F000000          <1> 	call	warm_ac97codec_reset
  3300 0001461F 7308                <1> 	jnc	short _r_ac97codec_ok
  3301                              <1> _r_ac97codec_cold:
  3302 00014621 E83B000000          <1>         call    cold_ac97codec_reset
  3303 00014626 7301                <1>         jnc     short _r_ac97codec_ok
  3304                              <1> 	
  3305                              <1> 	; 16/04/2017
  3306                              <1>         ;xor	eax, eax	; timeout error
  3307                              <1>        	;stc
  3308 00014628 C3                  <1> 	retn
  3309                              <1> 
  3310                              <1> _r_ac97codec_ok:
  3311 00014629 31C0                <1>         xor     eax, eax
  3312                              <1>         ;mov	al, VIA_ACLINK_C00_READY ; 1
  3313 0001462B FEC0                <1>         inc	al
  3314 0001462D C3                  <1> 	retn
  3315                              <1> 
  3316                              <1> warm_ac97codec_reset:
  3317                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  3318                              <1> 	; 28/05/2017 - Erdogan Tan (Ref: KolibriOS, intelac97.asm)
  3319                              <1>         ;mov	eax, 6
  3320                              <1> 	; 06/08/2022
  3321 0001462E 29C0                <1> 	sub	eax, eax
  3322 00014630 B006                <1> 	mov	al, 6
  3323 00014632 66BA2C00            <1> 	mov	dx, GLOB_CNT_REG ; 2Ch
  3324 00014636 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3325 0001463D EF                  <1> 	out	dx, eax
  3326                              <1> 
  3327                              <1> 	;mov	ecx, 10	; total 1s
  3328                              <1> 	; 06/08/2022
  3329 0001463E 31C9                <1> 	xor	ecx, ecx
  3330 00014640 B10A                <1> 	mov	cl, 10
  3331                              <1> _warm_ac97c_rst_wait:
  3332 00014642 51                  <1> 	push	ecx
  3333 00014643 E85EF6FFFF          <1> 	call	delay_100ms
  3334 00014648 59                  <1> 	pop	ecx
  3335                              <1> 
  3336 00014649 66BA3000            <1> 	mov	dx, GLOB_STS_REG ; 30h
  3337 0001464D 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3338 00014654 ED                  <1> 	in	eax, dx
  3339                              <1> 
  3340 00014655 A900030010          <1> 	test	eax, CTRL_ST_CREADY
  3341 0001465A 7504                <1> 	jnz	short _warm_ac97c_rst_ok
  3342                              <1> 
  3343 0001465C 49                  <1>         dec     ecx
  3344 0001465D 75E3                <1>         jnz     short _warm_ac97c_rst_wait
  3345                              <1> 
  3346                              <1> _warm_ac97c_rst_fail:
  3347 0001465F F9                  <1>         stc
  3348                              <1> _warm_ac97c_rst_ok:
  3349 00014660 C3                  <1> 	retn
  3350                              <1> 
  3351                              <1> cold_ac97codec_reset:
  3352                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  3353                              <1> 	; 28/05/2017 - Erdogan Tan (Ref: KolibriOS, intelac97.asm)
  3354                              <1>         ;mov	eax, 2
  3355                              <1> 	; 06/08/2022
  3356 00014661 31C0                <1> 	xor	eax, eax
  3357 00014663 B002                <1> 	mov	al, 2
  3358 00014665 66BA2C00            <1> 	mov	dx, GLOB_CNT_REG ; 2Ch
  3359 00014669 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3360 00014670 EF                  <1> 	out	dx, eax
  3361                              <1> 
  3362 00014671 E830F6FFFF          <1> 	call	delay_100ms 	; wait 100 ms
  3363 00014676 E82BF6FFFF          <1> 	call	delay_100ms 	; wait 100 ms
  3364 0001467B E826F6FFFF          <1> 	call	delay_100ms 	; wait 100 ms
  3365 00014680 E821F6FFFF          <1> 	call	delay_100ms 	; wait 100 ms
  3366                              <1> 
  3367                              <1> 	;mov	ecx, 16	; total 20*100 ms = 2s
  3368                              <1> 	; 06/08/2022
  3369 00014685 31C9                <1> 	xor	ecx, ecx
  3370 00014687 B110                <1> 	mov	cl, 16
  3371                              <1> _cold_ac97c_rst_wait:
  3372 00014689 66BA3000            <1> 	mov	dx, GLOB_STS_REG ; 30h
  3373 0001468D 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3374 00014694 ED                  <1> 	in	eax, dx
  3375                              <1> 
  3376 00014695 A900030010          <1> 	test	eax, CTRL_ST_CREADY
  3377 0001469A 750B                <1> 	jnz	short _cold_ac97c_rst_ok
  3378                              <1> 
  3379 0001469C 51                  <1> 	push	ecx
  3380 0001469D E804F6FFFF          <1> 	call	delay_100ms
  3381 000146A2 59                  <1> 	pop	ecx
  3382                              <1> 
  3383 000146A3 49                  <1>         dec     ecx
  3384 000146A4 75E3                <1>         jnz     short _cold_ac97c_rst_wait
  3385                              <1> 
  3386                              <1> _cold_ac97c_rst_fail:
  3387 000146A6 F9                  <1>         stc
  3388                              <1> _cold_ac97c_rst_ok:
  3389 000146A7 C3                  <1> 	retn
  3390                              <1> 
  3391                              <1> sb16_current_sound_data:
  3392                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  3393                              <1> 	; 20/08/2017
  3394                              <1> 	; 24/06/2017
  3395                              <1> 	; 22/06/2017
  3396                              <1> 	; get current sound (PCM out) data for graphics
  3397                              <1> 	; (for Sound Blaster 16)
  3398                              <1> 	; ebx = Physical address (on page boundary)
  3399                              <1> 	; ecx = Byte count
  3400                              <1> 	; [audio_buff_size]
  3401                              <1> 
  3402                              <1> 	;;mov	edi, [audio_buff_size]
  3403                              <1> 	;mov	edi, [audio_dmabuff_size]
  3404                              <1> 	;mov	esi, [audio_dma_buff]
  3405 000146A8 39CF                <1> 	cmp	edi, ecx
  3406 000146AA 7302                <1> 	jnb	short sb16_gcd_0
  3407 000146AC 89F9                <1> 	mov	ecx, edi
  3408                              <1> sb16_gcd_0:
  3409                              <1> 	; 06/08/2022
  3410 000146AE 31C0                <1> 	xor	eax, eax
  3411                              <1> 	; 20/08/2017
  3412 000146B0 803D[A0890100]10    <1> 	cmp	byte [audio_bps], 16
  3413 000146B7 750C                <1> 	jne	short sb16_gcd_1 ; 8 bit DMA channel
  3414 000146B9 E4C6                <1> 	in	al, 0C6h ; DMA channel 5 count register
  3415                              <1> 	;mov	dl, al
  3416                              <1> 	; 06/08/2022
  3417 000146BB 88C4                <1> 	mov	ah, al
  3418 000146BD E4C6                <1> 	in	al, 0C6h
  3419                              <1> 	;mov	dh, al
  3420                              <1> 	;movzx	eax, dx
  3421                              <1> 	; 06/08/2022
  3422 000146BF 86E0                <1> 	xchg	ah, al
  3423 000146C1 D1E0                <1> 	shl	eax, 1 ; word count -> byte count
  3424 000146C3 EB4A                <1> 	jmp	short sb16_gcd_2	
  3425                              <1> sb16_gcd_1:
  3426 000146C5 E403                <1> 	in	al, 03h ; DMA channel 1 count register
  3427                              <1> 	;mov	dl, al
  3428                              <1> 	; 06/08/2022
  3429 000146C7 88C4                <1> 	mov	ah, al
  3430 000146C9 E403                <1> 	in	al, 03h
  3431                              <1> 	;mov	dh, al
  3432                              <1> 	;movzx	eax, dx
  3433                              <1> 	; 06/08/2022
  3434 000146CB 86E0                <1> 	xchg	ah, al
  3435 000146CD EB40                <1> 	jmp	short sb16_gcd_2
  3436                              <1> ;sb16_gcd_2:	
  3437                              <1> ;	cmp	eax, ecx
  3438                              <1> ;	jnb	short sb16_gcd_3 
  3439                              <1> ;	; remain count < graphics bytes
  3440                              <1> ;	mov	eax, ecx ; fix remain count to data size
  3441                              <1> ;sb16_gcd_3:	
  3442                              <1> ;	sub	edi, eax
  3443                              <1> ;	jna	short sb16_gcd_4
  3444                              <1> ;	add	esi, edi ; dma buffer offset
  3445                              <1> ;sb16_gcd_4:
  3446                              <1> ;	mov	edi, ebx ; buffer address (for graphics) 
  3447                              <1> ;	mov	[u.r0], ecx
  3448                              <1> ;	rep	movsb
  3449                              <1> ;	retn
  3450                              <1> 
  3451                              <1> get_current_sound_data:
  3452                              <1> 	; 24/06/2017
  3453                              <1> 	; 22/06/2017
  3454                              <1> 	; get current sound (PCM out) data for graphics
  3455                              <1> 	;
  3456                              <1> 	; ebx = Physical address (on page boundary)
  3457                              <1> 	; ecx = Byte count
  3458                              <1> 	; [audio_buff_size]
  3459                              <1> 
  3460                              <1> 	;mov	edi, [audio_buff_size]
  3461 000146CF 8B3D[94890100]      <1> 	mov	edi, [audio_dmabuff_size]
  3462 000146D5 8B35[90890100]      <1> 	mov	esi, [audio_dma_buff]
  3463 000146DB 803D[71890100]02    <1> 	cmp	byte [audio_device], 2
  3464 000146E2 72C4                <1> 	jb	short sb16_current_sound_data ; = 1
  3465 000146E4 D1EF                <1> 	shr	edi, 1
  3466 000146E6 39CF                <1> 	cmp	edi, ecx
  3467 000146E8 7302                <1> 	jnb	short gcd_0
  3468 000146EA 89F9                <1> 	mov	ecx, edi
  3469                              <1> gcd_0:
  3470 000146EC 803D[71890100]03    <1> 	cmp	byte [audio_device], 3
  3471 000146F3 7231                <1> 	jb	short ac97_current_sound_data ; = 2
  3472                              <1> 	; = 3
  3473                              <1> vt8233_current_sound_data:
  3474                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  3475                              <1> 	; 22/06/2017
  3476                              <1> 	; 21/06/2017
  3477                              <1> 	; get current sound (PCM out) data for graphics
  3478                              <1> 	; (for VT 8233, VT 8237R)
  3479                              <1> 	; ebx = Physical address (on page boundary)
  3480                              <1> 	; ecx = Byte count
  3481                              <1> 	; [audio_buff_size]
  3482                              <1> 	
  3483                              <1> 	;;mov	edi, [audio_buff_size]
  3484                              <1> 	;mov	edi, [audio_dmabuff_size]
  3485                              <1> 	;mov	esi, [audio_dma_buff]
  3486                              <1> 	;shr	edi, 1
  3487                              <1> 	;cmp	edi, ecx
  3488                              <1> 	;jnb	short vt8233_gcd_1
  3489                              <1> 	;mov	ecx, edi
  3490                              <1> vt8233_gcd_1:
  3491                              <1> 	;mov	edx, VIA_REG_OFFSET_CURR_COUNT
  3492                              <1> 	; 06/08/2022
  3493 000146F5 31D2                <1> 	xor	edx, edx
  3494 000146F7 B20C                <1> 	mov	dl, VIA_REG_OFFSET_CURR_COUNT
  3495 000146F9 E808F6FFFF          <1> 	call	ctrl_io_r32
  3496 000146FE 89C2                <1> 	mov	edx, eax ; remain count (bits 23-0),
  3497                              <1> 			 ; SGD index (bits 31-24) 
  3498 00014700 81E200000001        <1> 	and	edx, 1000000h ; SGD index (0 = 1st half)
  3499 00014706 7402                <1> 	jz	short vt8233_gcd_2
  3500                              <1> 	; the second half of DMA buffer
  3501 00014708 01FE                <1> 	add	esi, edi 
  3502                              <1> vt8233_gcd_2:	
  3503 0001470A 25FFFFFF00          <1> 	and	eax, 0FFFFFFh ; bits 23-0
  3504                              <1> ac97_gcd_2:
  3505                              <1> sb16_gcd_2:
  3506 0001470F 39C8                <1> 	cmp	eax, ecx
  3507 00014711 7302                <1> 	jnb	short vt8233_gcd_3 
  3508                              <1> 	; remain count < graphics bytes
  3509 00014713 89C8                <1> 	mov	eax, ecx ; fix remain count to data size
  3510                              <1> vt8233_gcd_3:
  3511 00014715 29C7                <1> 	sub	edi, eax
  3512 00014717 7602                <1> 	jna	short vt8233_gcd_4
  3513 00014719 01FE                <1> 	add	esi, edi ; dma buffer offset
  3514                              <1> vt8233_gcd_4:
  3515 0001471B 89DF                <1> 	mov	edi, ebx ; buffer address (for graphics) 
  3516 0001471D 890D[1C010300]      <1> 	mov	[u.r0], ecx
  3517 00014723 F3A4                <1> 	rep	movsb
  3518                              <1> vt8233_gcd_5:
  3519 00014725 C3                  <1> 	retn
  3520                              <1> 
  3521                              <1> ac97_current_sound_data:
  3522                              <1> 	; 23/06/2017
  3523                              <1> 	; 22/06/2017
  3524                              <1> 	; get current sound (PCM out) data for graphics
  3525                              <1> 	; (for AC'97, ICH)
  3526                              <1> 	; ebx = Physical address (on page boundary)
  3527                              <1> 	; ecx = Byte count
  3528                              <1> 	; [audio_buff_size]
  3529                              <1> 	
  3530                              <1> 	;;mov	edi, [audio_buff_size]
  3531                              <1> 	;mov	edi, [audio_dmabuff_size]
  3532                              <1> 	;mov	esi, [audio_dma_buff]
  3533                              <1> 	;shr	edi, 1
  3534                              <1> 	;cmp	edi, ecx
  3535                              <1> 	;jnb	short ac97_gcd_0
  3536                              <1> 	;mov	ecx, edi
  3537                              <1> ac97_gcd_0:
  3538 00014726 66BA1400            <1> 	mov	dx, PO_CIV_REG ; Position In Current Buff Reg
  3539 0001472A 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3540 00014731 EC                  <1> 	in	al, dx ; current index value
  3541 00014732 A801                <1> 	test	al, 1
  3542 00014734 7402                <1> 	jz	short ac97_gcd_1
  3543 00014736 01FE                <1> 	add	esi, edi
  3544                              <1> ac97_gcd_1:
  3545 00014738 31C0                <1> 	xor	eax, eax
  3546 0001473A 66BA1800            <1> 	mov	dx, PO_PICB_REG ; Position In Current Buff Reg
  3547 0001473E 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3548 00014745 66ED                <1> 	in	ax, dx ; remain dwords
  3549 00014747 C1E002              <1> 	shl	eax, 2 ; remain bytes ; 23/06/2017 
  3550 0001474A EBC3                <1> 	jmp	short ac97_gcd_2
  3551                              <1> ;	cmp	eax, ecx
  3552                              <1> ;	jnb	short ac97_gcd_2 
  3553                              <1> ;	; remain count < graphics bytes
  3554                              <1> ;	mov	eax, ecx ; fix remain count to data size
  3555                              <1> ;ac97_gcd_2:	
  3556                              <1> ;	sub	edi, eax
  3557                              <1> ;	jna	short ac97_gcd_3
  3558                              <1> ;	add	esi, edi ; dma buffer offset
  3559                              <1> ;ac97_gcd_3:
  3560                              <1> ;	mov	edi, ebx ; buffer address (for graphics) 
  3561                              <1> ;	mov	[u.r0], ecx
  3562                              <1> ;	rep	movsb
  3563                              <1> ;	retn
  3564                              <1> 
  3565                              <1> sb16_get_dma_buff_off:
  3566                              <1> 	; 28/10/2017
  3567                              <1> 	; 24/06/2017
  3568                              <1> 	; 22/06/2017
  3569                              <1> 	; get current (PCM OUT DMA buffer) pointer
  3570                              <1> 	; (for Sound Blaster 16)
  3571                              <1> 
  3572                              <1> 	;mov	ecx, [audio_dmabuff_size]
  3573                              <1> 	;xor	ebx, ebx
  3574                              <1> 	;shr	ecx, 1
  3575                              <1> sb16_gdmabo_0:
  3576                              <1> 	; 28/10/2017
  3577 0001474C 803D[A0890100]10    <1> 	cmp	byte [audio_bps], 16
  3578 00014753 750F                <1> 	jne	short sb16_gdmabo_1 ; 8 bit DMA channel
  3579                              <1> 	; 16 bit DMA channel
  3580 00014755 E4C6                <1> 	in	al, 0C6h ; DMA channel 5 count register
  3581 00014757 88C2                <1> 	mov	dl, al	
  3582 00014759 E4C6                <1> 	in	al, 0C6h
  3583 0001475B 88C6                <1> 	mov     dh, al
  3584 0001475D 0FB7C2              <1> 	movzx	eax, dx
  3585 00014760 D1E0                <1> 	shl	eax, 1 ; word count -> byte count
  3586 00014762 EB3C                <1> 	jmp	short sb16_gdmabo_2	
  3587                              <1> sb16_gdmabo_1:
  3588 00014764 E403                <1> 	in	al, 03h ; DMA channel 1 count register
  3589 00014766 88C2                <1> 	mov	dl, al	
  3590 00014768 E403                <1> 	in	al, 03h
  3591 0001476A 88C6                <1> 	mov     dh, al
  3592 0001476C 0FB7C2              <1> 	movzx	eax, dx
  3593 0001476F EB2F                <1> 	jmp	short sb16_gdmabo_2
  3594                              <1> 
  3595                              <1> get_dma_buffer_offset:
  3596                              <1> 	; 24/06/2017
  3597                              <1> 	; 22/06/2017
  3598                              <1> 	; get current sound (PCM out) data for graphics
  3599                              <1> 	;
  3600                              <1> 	; ebx = Physical address (on page boundary)
  3601                              <1> 	; ecx = Byte count
  3602                              <1> 	; [audio_buff_size]
  3603                              <1> 
  3604 00014771 8B0D[94890100]      <1> 	mov	ecx, [audio_dmabuff_size]
  3605 00014777 31DB                <1> 	xor	ebx, ebx
  3606                              <1> gdmabo_0:
  3607 00014779 803D[71890100]02    <1> 	cmp	byte [audio_device], 2
  3608 00014780 72CA                <1> 	jb	short sb16_get_dma_buff_off
  3609 00014782 7429                <1> 	je	short ac97_get_dma_buff_off
  3610                              <1> 
  3611                              <1> vt8233_get_dma_buff_off:
  3612                              <1> 	; 06/08/2022 - TRDOS 386 v2.0.5
  3613                              <1> 	; 24/06/2017
  3614                              <1> 	; 22/06/2017
  3615                              <1> 	; get current (PCM OUT DMA buffer) pointer
  3616                              <1> 	; (for VT 8233, VT 8237R)
  3617                              <1> 	
  3618                              <1> 	;mov	ecx, [audio_dmabuff_size]
  3619                              <1> 	;xor	ebx, ebx
  3620 00014784 D1E9                <1> 	shr	ecx, 1
  3621                              <1> vt8233_gdmabo_0:
  3622                              <1> 	;mov	edx, VIA_REG_OFFSET_CURR_COUNT
  3623                              <1> 	; 06/08/2022
  3624 00014786 31D2                <1> 	xor	edx, edx
  3625 00014788 B20C                <1> 	mov	dl, VIA_REG_OFFSET_CURR_COUNT
  3626 0001478A E877F5FFFF          <1> 	call	ctrl_io_r32
  3627 0001478F 89C2                <1> 	mov	edx, eax ; remain count (bits 23-0),
  3628                              <1> 			 ; SGD index (bits 31-24) 
  3629 00014791 81E200000001        <1> 	and	edx, 1000000h ; SGD index (0 = 1st half)
  3630 00014797 7402                <1> 	jz	short vt8233_gdmabo_1
  3631                              <1> 	; the second half of DMA buffer
  3632 00014799 89CB                <1> 	mov	ebx, ecx 
  3633                              <1> vt8233_gdmabo_1:	
  3634 0001479B 25FFFFFF00          <1> 	and	eax, 0FFFFFFh ; bits 23-0
  3635                              <1> sb16_gdmabo_2:
  3636                              <1> ac97_gdmabo_2:
  3637 000147A0 29C1                <1> 	sub	ecx, eax
  3638 000147A2 7602                <1> 	jna	short vt8233_gdmabo_2
  3639 000147A4 01CB                <1> 	add	ebx, ecx ; dma buffer offset
  3640                              <1> vt8233_gdmabo_2:
  3641 000147A6 891D[1C010300]      <1> 	mov	[u.r0], ebx
  3642 000147AC C3                  <1> 	retn
  3643                              <1> 
  3644                              <1> ac97_get_dma_buff_off:
  3645                              <1> 	; 24/06/2017
  3646                              <1> 	; 22/06/2017
  3647                              <1> 	; get current (PCM OUT DMA buffer) pointer
  3648                              <1> 	; (for AC'97, ICH)
  3649                              <1> 	; ebx = Physical address (on page boundary)
  3650                              <1> 	; ecx = Byte count
  3651                              <1> 	; [audio_buff_size]
  3652                              <1> 	
  3653                              <1> 	;mov	ecx, [audio_dmabuff_size]
  3654                              <1> 	;xor	ebx, ebx
  3655 000147AD D1E9                <1> 	shr	ecx, 1
  3656                              <1> ac97_gdmabo_0:
  3657 000147AF 66BA1400            <1> 	mov	dx, PO_CIV_REG ; Position In Current Buff Reg
  3658 000147B3 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3659 000147BA EC                  <1> 	in	al, dx ; current index value
  3660 000147BB A801                <1> 	test	al, 1
  3661 000147BD 7402                <1> 	jz	short ac97_gdmabo_1
  3662 000147BF 89CB                <1> 	mov	ebx, ecx
  3663                              <1> ac97_gdmabo_1:
  3664 000147C1 31C0                <1> 	xor	eax, eax
  3665 000147C3 66BA1800            <1> 	mov	dx, PO_PICB_REG ; Position In Current Buff Reg
  3666 000147C7 660315[76890100]    <1> 	add	dx, [NABMBAR]
  3667 000147CE 66ED                <1> 	in	ax, dx ; remain dwords
  3668 000147D0 EBCE                <1> 	jmp	short ac97_gdmabo_2
  3669                              <1> 
  3670                              <1> ac97_codec_info:
  3671                              <1> 	; 19/11/2023
  3672                              <1> 	; ENTRY: none
  3673                              <1> 	; RETURN: 
  3674                              <1> 	;	eax = Extended Audio ID (MX28) in ax
  3675                              <1> 	;	 ax bit 0 - VRA bit
  3676                              <1> 	;	 hw of eax = PCM output sample rate (48000)
  3677                              <1> 	;	ebx = VENDOR ID 1, VENDOR ID 2 (bx)
  3678                              <1> 	;	cf = 1 -> error
  3679                              <1> 
  3680 000147D2 668B15[74890100]    <1> 	mov	dx, [NAMBAR]
  3681 000147D9 6683C226            <1> 	add	dx, CODEC_POWER_CTRL_REG ; 26h
  3682 000147DD 66ED                <1> 	in	ax, dx
  3683 000147DF 240F                <1> 	and	al, 0Fh
  3684 000147E1 7518                <1> 	jnz	short ac97_c_inf_1
  3685 000147E3 E8BEF4FFFF          <1> 	call	delay_100ms
  3686 000147E8 66ED                <1> 	in	ax, dx
  3687 000147EA 240F                <1> 	and	al, 0Fh
  3688 000147EC 750D                <1> 	jnz	short ac97_c_inf_1
  3689 000147EE E8B3F4FFFF          <1> 	call	delay_100ms
  3690 000147F3 66ED                <1> 	in	ax, dx
  3691 000147F5 240F                <1> 	and	al, 0Fh
  3692 000147F7 7502                <1> 	jnz	short ac97_c_inf_1
  3693 000147F9 F9                  <1> 	stc
  3694 000147FA C3                  <1> 	retn
  3695                              <1> ac97_c_inf_1:
  3696 000147FB 668B15[74890100]    <1> 	mov	dx, [NAMBAR]
  3697 00014802 6683C22C            <1> 	add	dx, CODEC_PCM_FRONT_DACRATE_REG 
  3698 00014806 66ED                <1> 	in	ax, dx	; PCM Output Sample Rate
  3699                              <1> 			; 48000 Hz
  3700 00014808 C1E010              <1> 	shl	eax, 16
  3701 0001480B E896F4FFFF          <1> 	call	delay_100ms
  3702 00014810 668B15[74890100]    <1> 	mov	dx, [NAMBAR]
  3703 00014817 6683C228            <1> 	add	dx, CODEC_EXT_AUDIO_REG ; 28h
  3704 0001481B 66ED                <1> 	in	ax, dx
  3705 0001481D 50                  <1> 	push	eax
  3706 0001481E E883F4FFFF          <1> 	call	delay_100ms
  3707 00014823 668B15[74890100]    <1> 	mov	dx, [NAMBAR]
  3708 0001482A 6683C27C            <1> 	add	dx, CODEC_VENDOR_ID1
  3709 0001482E 66ED                <1> 	in	ax, dx
  3710 00014830 C1E010              <1> 	shl	eax, 16
  3711 00014833 668B15[74890100]    <1> 	mov	dx, [NAMBAR]
  3712 0001483A 6683C27E            <1> 	add	dx, CODEC_VENDOR_ID2
  3713 0001483E 66ED                <1> 	in	ax, dx
  3714 00014840 89C3                <1> 	mov	ebx, eax
  3715 00014842 58                  <1> 	pop	eax
  3716 00014843 C3                  <1> 	retn
  3717                              <1> 
  3718                              <1> ; 19/11/2023
  3719                              <1> ; Valid ICH device IDs
  3720                              <1> 
  3721                              <1> valid_ids:
  3722 00014844 86801524            <1> dd	(ICH_DID << 16) + INTEL_VID  	 ; 8086h:2415h 
  3723 00014848 86802524            <1> dd	(ICH0_DID << 16) + INTEL_VID 	 ; 8086h:2425h 
  3724 0001484C 86804524            <1> dd	(ICH2_DID << 16) + INTEL_VID 	 ; 8086h:2445h 
  3725 00014850 86808524            <1> dd	(ICH3_DID << 16) + INTEL_VID 	 ; 8086h:2485h 
  3726 00014854 8680C524            <1> dd	(ICH4_DID << 16) + INTEL_VID 	 ; 8086h:24C5h
  3727 00014858 8680D524            <1> dd	(ICH5_DID << 16) + INTEL_VID 	 ; 8086h:24D5h
  3728 0001485C 86806E26            <1> dd	(ICH6_DID << 16) + INTEL_VID 	 ; 8086h:266Eh
  3729 00014860 8680A625            <1> dd	(ESB6300_DID << 16) + INTEL_VID  ; 8086h:25A6h
  3730 00014864 86809826            <1> dd	(ESB631X_DID << 16) + INTEL_VID  ; 8086h:2698h
  3731 00014868 8680DE27            <1> dd	(ICH7_DID << 16) + INTEL_VID 	 ; 8086h:27DEh
  3732 0001486C 86809571            <1> dd	(MX82440_DID << 16) + INTEL_VID  ; 8086h:7195h
  3733 00014870 39101270            <1> dd	(SI7012_DID << 16)  + SIS_VID	 ; 1039h:7012h
  3734 00014874 DE10B101            <1> dd 	(NFORCE_DID << 16)  + NVIDIA_VID ; 10DEh:01B1h
  3735 00014878 DE106A00            <1> dd 	(NFORCE2_DID << 16) + NVIDIA_VID ; 10DEh:006Ah
  3736 0001487C 22106D74            <1> dd 	(AMD8111_DID << 16) + AMD_VID 	 ; 1022h:746Dh
  3737 00014880 22104574            <1> dd 	(AMD768_DID << 16)  + AMD_VID 	 ; 1022h:7445h
  3738 00014884 DE105900            <1> dd 	(CK804_DID << 16) + NVIDIA_VID	 ; 10DEh:0059h
  3739 00014888 DE103A00            <1> dd 	(MCP04_DID << 16) + NVIDIA_VID	 ; 10DEh:003Ah
  3740 0001488C DE108A00            <1> dd 	(CK8_DID << 16) + NVIDIA_VID	 ; 1022h:008Ah
  3741 00014890 DE10DA00            <1> dd 	(NFORCE3_DID << 16) + NVIDIA_VID ; 10DEh:00DAh
  3742 00014894 DE10EA00            <1> dd 	(CK8S_DID << 16) + NVIDIA_VID	 ; 10DEh:00EAh
  3743                              <1> 
  3744                              <1> valid_id_count:	equ ($ - valid_ids)>>2 ; 19/11/2023
  3657                                  
  3658                                  align 4
  3659                                  
  3660                                  %include 'vgadata.s' ; 04/07/2016
     1                              <1> ; ****************************************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel) - v2.0.3 - vgadata.s  (palette and font data)
     3                              <1> ; -----------------------------------------------------------------------------
     4                              <1> ; Last Update: 01/01/2021
     5                              <1> ; -----------------------------------------------------------------------------
     6                              <1> ; Beginning: 16/01/2016
     7                              <1> ; -----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; -----------------------------------------------------------------------------
    10                              <1> ; Turkish Rational DOS
    11                              <1> ; Operating System Project v2.0 by ERDOGAN TAN (Beginning: 04/01/2016)
    12                              <1> ;
    13                              <1> ; Derived from 'Plex86/Bochs VGABios' source code, vgabios-0.7a (2011)
    14                              <1> ; by the LGPL VGABios Developers Team (2001-2008), 'vgatables.h'
    15                              <1> ;
    16                              <1> ; Oracle VirtualBox 5.0.24 VGABios Source Code 
    17                              <1> ; ('vgabios.c', 'vgatables.h', 'vgafonts.h', 'vgarom.asm')
    18                              <1> ;
    19                              <1> ; Palette and font data in assembly language format:
    20                              <1> ; 'VBoxVgaBiosAlternative.asm'
    21                              <1> 
    22                              <1> ; ****************************************************************************************************
    23                              <1> 
    24                              <1> ; 25/11/2020 (TRDOS 386 v2.0.3)
    25                              <1> ; ('vgatables.h' - 30/12/2019 - vruppert)
    26                              <1>  
    27                              <1> ; 04/07/2016
    28                              <1> ; COLOR DATA
    29                              <1> 
    30                              <1> palette0: ; (63+1)*3
    31 00014898 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
    31 000148A1 00000000000000      <1>
    32 000148A8 00000000000000002A- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah
    32 000148B1 2A2A2A2A2A2A2A      <1>
    33 000148B8 2A2A2A2A2A2A2A2A2A- <1>     db  02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah
    33 000148C1 2A2A2A2A2A2A2A      <1>
    34 000148C8 2A2A2A2A2A2A2A2A2A- <1>     db  02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah
    34 000148D1 2A2A2A2A2A2A2A      <1>
    35 000148D8 2A2A2A2A2A2A2A2A3F- <1>     db  02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh
    35 000148E1 3F3F3F3F3F3F3F      <1>
    36 000148E8 3F3F3F3F3F3F3F3F3F- <1>     db  03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh
    36 000148F1 3F3F3F3F3F3F3F      <1>
    37 000148F8 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
    37 00014901 00000000000000      <1>
    38 00014908 00000000000000002A- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah
    38 00014911 2A2A2A2A2A2A2A      <1>
    39 00014918 2A2A2A2A2A2A2A2A2A- <1>     db  02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah
    39 00014921 2A2A2A2A2A2A2A      <1>
    40 00014928 2A2A2A2A2A2A2A2A2A- <1>     db  02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah
    40 00014931 2A2A2A2A2A2A2A      <1>
    41 00014938 2A2A2A2A2A2A2A2A3F- <1>     db  02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 02ah, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh
    41 00014941 3F3F3F3F3F3F3F      <1>
    42 00014948 3F3F3F3F3F3F3F3F3F- <1>     db  03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh, 03fh
    42 00014951 3F3F3F3F3F3F3F      <1>
    43                              <1> palette1: ; (63+1)*3	
    44 00014958 00000000002A002A00- <1>     db  000h, 000h, 000h, 000h, 000h, 02ah, 000h, 02ah, 000h, 000h, 02ah, 02ah, 02ah, 000h, 000h, 02ah
    44 00014961 002A2A2A00002A      <1>
    45 00014968 002A2A15002A2A2A00- <1>     db  000h, 02ah, 02ah, 015h, 000h, 02ah, 02ah, 02ah, 000h, 000h, 000h, 000h, 000h, 02ah, 000h, 02ah
    45 00014971 000000002A002A      <1>
    46 00014978 00002A2A2A00002A00- <1>     db  000h, 000h, 02ah, 02ah, 02ah, 000h, 000h, 02ah, 000h, 02ah, 02ah, 015h, 000h, 02ah, 02ah, 02ah
    46 00014981 2A2A15002A2A2A      <1>
    47 00014988 15151515153F153F15- <1>     db  015h, 015h, 015h, 015h, 015h, 03fh, 015h, 03fh, 015h, 015h, 03fh, 03fh, 03fh, 015h, 015h, 03fh
    47 00014991 153F3F3F15153F      <1>
    48 00014998 153F3F3F153F3F3F15- <1>     db  015h, 03fh, 03fh, 03fh, 015h, 03fh, 03fh, 03fh, 015h, 015h, 015h, 015h, 015h, 03fh, 015h, 03fh
    48 000149A1 151515153F153F      <1>
    49 000149A8 15153F3F3F15153F15- <1>     db  015h, 015h, 03fh, 03fh, 03fh, 015h, 015h, 03fh, 015h, 03fh, 03fh, 03fh, 015h, 03fh, 03fh, 03fh
    49 000149B1 3F3F3F153F3F3F      <1>
    50 000149B8 00000000002A002A00- <1>     db  000h, 000h, 000h, 000h, 000h, 02ah, 000h, 02ah, 000h, 000h, 02ah, 02ah, 02ah, 000h, 000h, 02ah
    50 000149C1 002A2A2A00002A      <1>
    51 000149C8 002A2A15002A2A2A00- <1>     db  000h, 02ah, 02ah, 015h, 000h, 02ah, 02ah, 02ah, 000h, 000h, 000h, 000h, 000h, 02ah, 000h, 02ah
    51 000149D1 000000002A002A      <1>
    52 000149D8 00002A2A2A00002A00- <1>     db  000h, 000h, 02ah, 02ah, 02ah, 000h, 000h, 02ah, 000h, 02ah, 02ah, 015h, 000h, 02ah, 02ah, 02ah
    52 000149E1 2A2A15002A2A2A      <1>
    53 000149E8 15151515153F153F15- <1>     db  015h, 015h, 015h, 015h, 015h, 03fh, 015h, 03fh, 015h, 015h, 03fh, 03fh, 03fh, 015h, 015h, 03fh
    53 000149F1 153F3F3F15153F      <1>
    54 000149F8 153F3F3F153F3F3F15- <1>     db  015h, 03fh, 03fh, 03fh, 015h, 03fh, 03fh, 03fh, 015h, 015h, 015h, 015h, 015h, 03fh, 015h, 03fh
    54 00014A01 151515153F153F      <1>
    55 00014A08 15153F3F3F15153F15- <1>     db  015h, 015h, 03fh, 03fh, 03fh, 015h, 015h, 03fh, 015h, 03fh, 03fh, 03fh, 015h, 03fh, 03fh, 03fh
    55 00014A11 3F3F3F153F3F3F      <1>
    56                              <1> palette2: ; (63+1)*3
    57 00014A18 00000000002A002A00- <1>     db  000h, 000h, 000h, 000h, 000h, 02ah, 000h, 02ah, 000h, 000h, 02ah, 02ah, 02ah, 000h, 000h, 02ah
    57 00014A21 002A2A2A00002A      <1>
    58 00014A28 002A2A2A002A2A2A00- <1>     db  000h, 02ah, 02ah, 02ah, 000h, 02ah, 02ah, 02ah, 000h, 000h, 015h, 000h, 000h, 03fh, 000h, 02ah
    58 00014A31 001500003F002A      <1>
    59 00014A38 15002A3F2A00152A00- <1>     db  015h, 000h, 02ah, 03fh, 02ah, 000h, 015h, 02ah, 000h, 03fh, 02ah, 02ah, 015h, 02ah, 02ah, 03fh
    59 00014A41 3F2A2A152A2A3F      <1>
    60 00014A48 00150000152A003F00- <1>     db  000h, 015h, 000h, 000h, 015h, 02ah, 000h, 03fh, 000h, 000h, 03fh, 02ah, 02ah, 015h, 000h, 02ah
    60 00014A51 003F2A2A15002A      <1>
    61 00014A58 152A2A3F002A3F2A00- <1>     db  015h, 02ah, 02ah, 03fh, 000h, 02ah, 03fh, 02ah, 000h, 015h, 015h, 000h, 015h, 03fh, 000h, 03fh
    61 00014A61 151500153F003F      <1>
    62 00014A68 15003F3F2A15152A15- <1>     db  015h, 000h, 03fh, 03fh, 02ah, 015h, 015h, 02ah, 015h, 03fh, 02ah, 03fh, 015h, 02ah, 03fh, 03fh
    62 00014A71 3F2A3F152A3F3F      <1>
    63 00014A78 15000015002A152A00- <1>     db  015h, 000h, 000h, 015h, 000h, 02ah, 015h, 02ah, 000h, 015h, 02ah, 02ah, 03fh, 000h, 000h, 03fh
    63 00014A81 152A2A3F00003F      <1>
    64 00014A88 002A3F2A003F2A2A15- <1>     db  000h, 02ah, 03fh, 02ah, 000h, 03fh, 02ah, 02ah, 015h, 000h, 015h, 015h, 000h, 03fh, 015h, 02ah
    64 00014A91 001515003F152A      <1>
    65 00014A98 15152A3F3F00153F00- <1>     db  015h, 015h, 02ah, 03fh, 03fh, 000h, 015h, 03fh, 000h, 03fh, 03fh, 02ah, 015h, 03fh, 02ah, 03fh
    65 00014AA1 3F3F2A153F2A3F      <1>
    66 00014AA8 15150015152A153F00- <1>     db  015h, 015h, 000h, 015h, 015h, 02ah, 015h, 03fh, 000h, 015h, 03fh, 02ah, 03fh, 015h, 000h, 03fh
    66 00014AB1 153F2A3F15003F      <1>
    67 00014AB8 152A3F3F003F3F2A15- <1>     db  015h, 02ah, 03fh, 03fh, 000h, 03fh, 03fh, 02ah, 015h, 015h, 015h, 015h, 015h, 03fh, 015h, 03fh
    67 00014AC1 151515153F153F      <1>
    68 00014AC8 15153F3F3F15153F15- <1>     db  015h, 015h, 03fh, 03fh, 03fh, 015h, 015h, 03fh, 015h, 03fh, 03fh, 03fh, 015h, 03fh, 03fh, 03fh
    68 00014AD1 3F3F3F153F3F3F      <1>
    69                              <1> palette3: ; 256*3
    70 00014AD8 00000000002A002A00- <1>     db  000h, 000h, 000h, 000h, 000h, 02ah, 000h, 02ah, 000h, 000h, 02ah, 02ah, 02ah, 000h, 000h, 02ah
    70 00014AE1 002A2A2A00002A      <1>
    71 00014AE8 002A2A15002A2A2A15- <1>     db  000h, 02ah, 02ah, 015h, 000h, 02ah, 02ah, 02ah, 015h, 015h, 015h, 015h, 015h, 03fh, 015h, 03fh
    71 00014AF1 151515153F153F      <1>
    72 00014AF8 15153F3F3F15153F15- <1>     db  015h, 015h, 03fh, 03fh, 03fh, 015h, 015h, 03fh, 015h, 03fh, 03fh, 03fh, 015h, 03fh, 03fh, 03fh
    72 00014B01 3F3F3F153F3F3F      <1>
    73 00014B08 000000050505080808- <1>     db  000h, 000h, 000h, 005h, 005h, 005h, 008h, 008h, 008h, 00bh, 00bh, 00bh, 00eh, 00eh, 00eh, 011h
    73 00014B11 0B0B0B0E0E0E11      <1>
    74 00014B18 11111414141818181C- <1>     db  011h, 011h, 014h, 014h, 014h, 018h, 018h, 018h, 01ch, 01ch, 01ch, 020h, 020h, 020h, 024h, 024h
    74 00014B21 1C1C2020202424      <1>
    75 00014B28 242828282D2D2D3232- <1>     db  024h, 028h, 028h, 028h, 02dh, 02dh, 02dh, 032h, 032h, 032h, 038h, 038h, 038h, 03fh, 03fh, 03fh
    75 00014B31 323838383F3F3F      <1>
    76 00014B38 00003F10003F1F003F- <1>     db  000h, 000h, 03fh, 010h, 000h, 03fh, 01fh, 000h, 03fh, 02fh, 000h, 03fh, 03fh, 000h, 03fh, 03fh
    76 00014B41 2F003F3F003F3F      <1>
    77 00014B48 002F3F001F3F00103F- <1>     db  000h, 02fh, 03fh, 000h, 01fh, 03fh, 000h, 010h, 03fh, 000h, 000h, 03fh, 010h, 000h, 03fh, 01fh
    77 00014B51 00003F10003F1F      <1>
    78 00014B58 003F2F003F3F002F3F- <1>     db  000h, 03fh, 02fh, 000h, 03fh, 03fh, 000h, 02fh, 03fh, 000h, 01fh, 03fh, 000h, 010h, 03fh, 000h
    78 00014B61 001F3F00103F00      <1>
    79 00014B68 003F00003F10003F1F- <1>     db  000h, 03fh, 000h, 000h, 03fh, 010h, 000h, 03fh, 01fh, 000h, 03fh, 02fh, 000h, 03fh, 03fh, 000h
    79 00014B71 003F2F003F3F00      <1>
    80 00014B78 2F3F001F3F00103F1F- <1>     db  02fh, 03fh, 000h, 01fh, 03fh, 000h, 010h, 03fh, 01fh, 01fh, 03fh, 027h, 01fh, 03fh, 02fh, 01fh
    80 00014B81 1F3F271F3F2F1F      <1>
    81 00014B88 3F371F3F3F1F3F3F1F- <1>     db  03fh, 037h, 01fh, 03fh, 03fh, 01fh, 03fh, 03fh, 01fh, 037h, 03fh, 01fh, 02fh, 03fh, 01fh, 027h
    81 00014B91 373F1F2F3F1F27      <1>
    82 00014B98 3F1F1F3F271F3F2F1F- <1>     db  03fh, 01fh, 01fh, 03fh, 027h, 01fh, 03fh, 02fh, 01fh, 03fh, 037h, 01fh, 03fh, 03fh, 01fh, 037h
    82 00014BA1 3F371F3F3F1F37      <1>
    83 00014BA8 3F1F2F3F1F273F1F1F- <1>     db  03fh, 01fh, 02fh, 03fh, 01fh, 027h, 03fh, 01fh, 01fh, 03fh, 01fh, 01fh, 03fh, 027h, 01fh, 03fh
    83 00014BB1 3F1F1F3F271F3F      <1>
    84 00014BB8 2F1F3F371F3F3F1F37- <1>     db  02fh, 01fh, 03fh, 037h, 01fh, 03fh, 03fh, 01fh, 037h, 03fh, 01fh, 02fh, 03fh, 01fh, 027h, 03fh
    84 00014BC1 3F1F2F3F1F273F      <1>
    85 00014BC8 2D2D3F312D3F362D3F- <1>     db  02dh, 02dh, 03fh, 031h, 02dh, 03fh, 036h, 02dh, 03fh, 03ah, 02dh, 03fh, 03fh, 02dh, 03fh, 03fh
    85 00014BD1 3A2D3F3F2D3F3F      <1>
    86 00014BD8 2D3A3F2D363F2D313F- <1>     db  02dh, 03ah, 03fh, 02dh, 036h, 03fh, 02dh, 031h, 03fh, 02dh, 02dh, 03fh, 031h, 02dh, 03fh, 036h
    86 00014BE1 2D2D3F312D3F36      <1>
    87 00014BE8 2D3F3A2D3F3F2D3A3F- <1>     db  02dh, 03fh, 03ah, 02dh, 03fh, 03fh, 02dh, 03ah, 03fh, 02dh, 036h, 03fh, 02dh, 031h, 03fh, 02dh
    87 00014BF1 2D363F2D313F2D      <1>
    88 00014BF8 2D3F2D2D3F312D3F36- <1>     db  02dh, 03fh, 02dh, 02dh, 03fh, 031h, 02dh, 03fh, 036h, 02dh, 03fh, 03ah, 02dh, 03fh, 03fh, 02dh
    88 00014C01 2D3F3A2D3F3F2D      <1>
    89 00014C08 3A3F2D363F2D313F00- <1>     db  03ah, 03fh, 02dh, 036h, 03fh, 02dh, 031h, 03fh, 000h, 000h, 01ch, 007h, 000h, 01ch, 00eh, 000h
    89 00014C11 001C07001C0E00      <1>
    90 00014C18 1C15001C1C001C1C00- <1>     db  01ch, 015h, 000h, 01ch, 01ch, 000h, 01ch, 01ch, 000h, 015h, 01ch, 000h, 00eh, 01ch, 000h, 007h
    90 00014C21 151C000E1C0007      <1>
    91 00014C28 1C00001C07001C0E00- <1>     db  01ch, 000h, 000h, 01ch, 007h, 000h, 01ch, 00eh, 000h, 01ch, 015h, 000h, 01ch, 01ch, 000h, 015h
    91 00014C31 1C15001C1C0015      <1>
    92 00014C38 1C000E1C00071C0000- <1>     db  01ch, 000h, 00eh, 01ch, 000h, 007h, 01ch, 000h, 000h, 01ch, 000h, 000h, 01ch, 007h, 000h, 01ch
    92 00014C41 1C00001C07001C      <1>
    93 00014C48 0E001C15001C1C0015- <1>     db  00eh, 000h, 01ch, 015h, 000h, 01ch, 01ch, 000h, 015h, 01ch, 000h, 00eh, 01ch, 000h, 007h, 01ch
    93 00014C51 1C000E1C00071C      <1>
    94 00014C58 0E0E1C110E1C150E1C- <1>     db  00eh, 00eh, 01ch, 011h, 00eh, 01ch, 015h, 00eh, 01ch, 018h, 00eh, 01ch, 01ch, 00eh, 01ch, 01ch
    94 00014C61 180E1C1C0E1C1C      <1>
    95 00014C68 0E181C0E151C0E111C- <1>     db  00eh, 018h, 01ch, 00eh, 015h, 01ch, 00eh, 011h, 01ch, 00eh, 00eh, 01ch, 011h, 00eh, 01ch, 015h
    95 00014C71 0E0E1C110E1C15      <1>
    96 00014C78 0E1C180E1C1C0E181C- <1>     db  00eh, 01ch, 018h, 00eh, 01ch, 01ch, 00eh, 018h, 01ch, 00eh, 015h, 01ch, 00eh, 011h, 01ch, 00eh
    96 00014C81 0E151C0E111C0E      <1>
    97 00014C88 0E1C0E0E1C110E1C15- <1>     db  00eh, 01ch, 00eh, 00eh, 01ch, 011h, 00eh, 01ch, 015h, 00eh, 01ch, 018h, 00eh, 01ch, 01ch, 00eh
    97 00014C91 0E1C180E1C1C0E      <1>
    98 00014C98 181C0E151C0E111C14- <1>     db  018h, 01ch, 00eh, 015h, 01ch, 00eh, 011h, 01ch, 014h, 014h, 01ch, 016h, 014h, 01ch, 018h, 014h
    98 00014CA1 141C16141C1814      <1>
    99 00014CA8 1C1A141C1C141C1C14- <1>     db  01ch, 01ah, 014h, 01ch, 01ch, 014h, 01ch, 01ch, 014h, 01ah, 01ch, 014h, 018h, 01ch, 014h, 016h
    99 00014CB1 1A1C14181C1416      <1>
   100 00014CB8 1C14141C16141C1814- <1>     db  01ch, 014h, 014h, 01ch, 016h, 014h, 01ch, 018h, 014h, 01ch, 01ah, 014h, 01ch, 01ch, 014h, 01ah
   100 00014CC1 1C1A141C1C141A      <1>
   101 00014CC8 1C14181C14161C1414- <1>     db  01ch, 014h, 018h, 01ch, 014h, 016h, 01ch, 014h, 014h, 01ch, 014h, 014h, 01ch, 016h, 014h, 01ch
   101 00014CD1 1C14141C16141C      <1>
   102 00014CD8 18141C1A141C1C141A- <1>     db  018h, 014h, 01ch, 01ah, 014h, 01ch, 01ch, 014h, 01ah, 01ch, 014h, 018h, 01ch, 014h, 016h, 01ch
   102 00014CE1 1C14181C14161C      <1>
   103 00014CE8 000010040010080010- <1>     db  000h, 000h, 010h, 004h, 000h, 010h, 008h, 000h, 010h, 00ch, 000h, 010h, 010h, 000h, 010h, 010h
   103 00014CF1 0C001010001010      <1>
   104 00014CF8 000C10000810000410- <1>     db  000h, 00ch, 010h, 000h, 008h, 010h, 000h, 004h, 010h, 000h, 000h, 010h, 004h, 000h, 010h, 008h
   104 00014D01 00001004001008      <1>
   105 00014D08 00100C001010000C10- <1>     db  000h, 010h, 00ch, 000h, 010h, 010h, 000h, 00ch, 010h, 000h, 008h, 010h, 000h, 004h, 010h, 000h
   105 00014D11 00081000041000      <1>
   106 00014D18 001000001004001008- <1>     db  000h, 010h, 000h, 000h, 010h, 004h, 000h, 010h, 008h, 000h, 010h, 00ch, 000h, 010h, 010h, 000h
   106 00014D21 00100C00101000      <1>
   107 00014D28 0C1000081000041008- <1>     db  00ch, 010h, 000h, 008h, 010h, 000h, 004h, 010h, 008h, 008h, 010h, 00ah, 008h, 010h, 00ch, 008h
   107 00014D31 08100A08100C08      <1>
   108 00014D38 100E08101008101008- <1>     db  010h, 00eh, 008h, 010h, 010h, 008h, 010h, 010h, 008h, 00eh, 010h, 008h, 00ch, 010h, 008h, 00ah
   108 00014D41 0E10080C10080A      <1>
   109 00014D48 100808100A08100C08- <1>     db  010h, 008h, 008h, 010h, 00ah, 008h, 010h, 00ch, 008h, 010h, 00eh, 008h, 010h, 010h, 008h, 00eh
   109 00014D51 100E081010080E      <1>
   110 00014D58 10080C10080A100808- <1>     db  010h, 008h, 00ch, 010h, 008h, 00ah, 010h, 008h, 008h, 010h, 008h, 008h, 010h, 00ah, 008h, 010h
   110 00014D61 100808100A0810      <1>
   111 00014D68 0C08100E081010080E- <1>     db  00ch, 008h, 010h, 00eh, 008h, 010h, 010h, 008h, 00eh, 010h, 008h, 00ch, 010h, 008h, 00ah, 010h
   111 00014D71 10080C10080A10      <1>
   112 00014D78 0B0B100C0B100D0B10- <1>     db  00bh, 00bh, 010h, 00ch, 00bh, 010h, 00dh, 00bh, 010h, 00fh, 00bh, 010h, 010h, 00bh, 010h, 010h
   112 00014D81 0F0B10100B1010      <1>
   113 00014D88 0B0F100B0D100B0C10- <1>     db  00bh, 00fh, 010h, 00bh, 00dh, 010h, 00bh, 00ch, 010h, 00bh, 00bh, 010h, 00ch, 00bh, 010h, 00dh
   113 00014D91 0B0B100C0B100D      <1>
   114 00014D98 0B100F0B10100B0F10- <1>     db  00bh, 010h, 00fh, 00bh, 010h, 010h, 00bh, 00fh, 010h, 00bh, 00dh, 010h, 00bh, 00ch, 010h, 00bh
   114 00014DA1 0B0D100B0C100B      <1>
   115 00014DA8 0B100B0B100C0B100D- <1>     db  00bh, 010h, 00bh, 00bh, 010h, 00ch, 00bh, 010h, 00dh, 00bh, 010h, 00fh, 00bh, 010h, 010h, 00bh
   115 00014DB1 0B100F0B10100B      <1>
   116 00014DB8 0F100B0D100B0C1000- <1>     db  00fh, 010h, 00bh, 00dh, 010h, 00bh, 00ch, 010h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   116 00014DC1 00000000000000      <1>
   117 00014DC8 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   117 00014DD1 00000000000000      <1>
   118                              <1> 
   119                              <1> 
   120                              <1> ; 04/07/2016
   121                              <1> ; FONT DATA
   122                              <1> 
   123                              <1> CRT_CHAR_GEN:
   124                              <1> vgafont8: 
   125 00014DD8 00000000000000007E- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 07eh, 081h, 0a5h, 081h, 0bdh, 099h, 081h, 07eh
   125 00014DE1 81A581BD99817E      <1>
   126 00014DE8 7EFFDBFFC3E7FF7E6C- <1>     db  07eh, 0ffh, 0dbh, 0ffh, 0c3h, 0e7h, 0ffh, 07eh, 06ch, 0feh, 0feh, 0feh, 07ch, 038h, 010h, 000h
   126 00014DF1 FEFEFE7C381000      <1>
   127 00014DF8 10387CFE7C38100038- <1>     db  010h, 038h, 07ch, 0feh, 07ch, 038h, 010h, 000h, 038h, 07ch, 038h, 0feh, 0feh, 07ch, 038h, 07ch
   127 00014E01 7C38FEFE7C387C      <1>
   128 00014E08 1010387CFE7C387C00- <1>     db  010h, 010h, 038h, 07ch, 0feh, 07ch, 038h, 07ch, 000h, 000h, 018h, 03ch, 03ch, 018h, 000h, 000h
   128 00014E11 00183C3C180000      <1>
   129 00014E18 FFFFE7C3C3E7FFFF00- <1>     db  0ffh, 0ffh, 0e7h, 0c3h, 0c3h, 0e7h, 0ffh, 0ffh, 000h, 03ch, 066h, 042h, 042h, 066h, 03ch, 000h
   129 00014E21 3C664242663C00      <1>
   130 00014E28 FFC399BDBD99C3FF0F- <1>     db  0ffh, 0c3h, 099h, 0bdh, 0bdh, 099h, 0c3h, 0ffh, 00fh, 007h, 00fh, 07dh, 0cch, 0cch, 0cch, 078h
   130 00014E31 070F7DCCCCCC78      <1>
   131 00014E38 3C6666663C187E183F- <1>     db  03ch, 066h, 066h, 066h, 03ch, 018h, 07eh, 018h, 03fh, 033h, 03fh, 030h, 030h, 070h, 0f0h, 0e0h
   131 00014E41 333F303070F0E0      <1>
   132 00014E48 7F637F636367E6C099- <1>     db  07fh, 063h, 07fh, 063h, 063h, 067h, 0e6h, 0c0h, 099h, 05ah, 03ch, 0e7h, 0e7h, 03ch, 05ah, 099h
   132 00014E51 5A3CE7E73C5A99      <1>
   133 00014E58 80E0F8FEF8E0800002- <1>     db  080h, 0e0h, 0f8h, 0feh, 0f8h, 0e0h, 080h, 000h, 002h, 00eh, 03eh, 0feh, 03eh, 00eh, 002h, 000h
   133 00014E61 0E3EFE3E0E0200      <1>
   134 00014E68 183C7E18187E3C1866- <1>     db  018h, 03ch, 07eh, 018h, 018h, 07eh, 03ch, 018h, 066h, 066h, 066h, 066h, 066h, 000h, 066h, 000h
   134 00014E71 66666666006600      <1>
   135 00014E78 7FDBDB7B1B1B1B003E- <1>     db  07fh, 0dbh, 0dbh, 07bh, 01bh, 01bh, 01bh, 000h, 03eh, 063h, 038h, 06ch, 06ch, 038h, 0cch, 078h
   135 00014E81 63386C6C38CC78      <1>
   136 00014E88 000000007E7E7E0018- <1>     db  000h, 000h, 000h, 000h, 07eh, 07eh, 07eh, 000h, 018h, 03ch, 07eh, 018h, 07eh, 03ch, 018h, 0ffh
   136 00014E91 3C7E187E3C18FF      <1>
   137 00014E98 183C7E181818180018- <1>     db  018h, 03ch, 07eh, 018h, 018h, 018h, 018h, 000h, 018h, 018h, 018h, 018h, 07eh, 03ch, 018h, 000h
   137 00014EA1 1818187E3C1800      <1>
   138 00014EA8 00180CFE0C18000000- <1>     db  000h, 018h, 00ch, 0feh, 00ch, 018h, 000h, 000h, 000h, 030h, 060h, 0feh, 060h, 030h, 000h, 000h
   138 00014EB1 3060FE60300000      <1>
   139 00014EB8 0000C0C0C0FE000000- <1>     db  000h, 000h, 0c0h, 0c0h, 0c0h, 0feh, 000h, 000h, 000h, 024h, 066h, 0ffh, 066h, 024h, 000h, 000h
   139 00014EC1 2466FF66240000      <1>
   140 00014EC8 00183C7EFFFF000000- <1>     db  000h, 018h, 03ch, 07eh, 0ffh, 0ffh, 000h, 000h, 000h, 0ffh, 0ffh, 07eh, 03ch, 018h, 000h, 000h
   140 00014ED1 FFFF7E3C180000      <1>
   141 00014ED8 000000000000000030- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 030h, 078h, 078h, 030h, 030h, 000h, 030h, 000h
   141 00014EE1 78783030003000      <1>
   142 00014EE8 6C6C6C00000000006C- <1>     db  06ch, 06ch, 06ch, 000h, 000h, 000h, 000h, 000h, 06ch, 06ch, 0feh, 06ch, 0feh, 06ch, 06ch, 000h
   142 00014EF1 6CFE6CFE6C6C00      <1>
   143 00014EF8 307CC0780CF8300000- <1>     db  030h, 07ch, 0c0h, 078h, 00ch, 0f8h, 030h, 000h, 000h, 0c6h, 0cch, 018h, 030h, 066h, 0c6h, 000h
   143 00014F01 C6CC183066C600      <1>
   144 00014F08 386C3876DCCC760060- <1>     db  038h, 06ch, 038h, 076h, 0dch, 0cch, 076h, 000h, 060h, 060h, 0c0h, 000h, 000h, 000h, 000h, 000h
   144 00014F11 60C00000000000      <1>
   145 00014F18 183060606030180060- <1>     db  018h, 030h, 060h, 060h, 060h, 030h, 018h, 000h, 060h, 030h, 018h, 018h, 018h, 030h, 060h, 000h
   145 00014F21 30181818306000      <1>
   146 00014F28 00663CFF3C66000000- <1>     db  000h, 066h, 03ch, 0ffh, 03ch, 066h, 000h, 000h, 000h, 030h, 030h, 0fch, 030h, 030h, 000h, 000h
   146 00014F31 3030FC30300000      <1>
   147 00014F38 000000000030306000- <1>     db  000h, 000h, 000h, 000h, 000h, 030h, 030h, 060h, 000h, 000h, 000h, 0fch, 000h, 000h, 000h, 000h
   147 00014F41 0000FC00000000      <1>
   148 00014F48 000000000030300006- <1>     db  000h, 000h, 000h, 000h, 000h, 030h, 030h, 000h, 006h, 00ch, 018h, 030h, 060h, 0c0h, 080h, 000h
   148 00014F51 0C183060C08000      <1>
   149 00014F58 7CC6CEDEF6E67C0030- <1>     db  07ch, 0c6h, 0ceh, 0deh, 0f6h, 0e6h, 07ch, 000h, 030h, 070h, 030h, 030h, 030h, 030h, 0fch, 000h
   149 00014F61 7030303030FC00      <1>
   150 00014F68 78CC0C3860CCFC0078- <1>     db  078h, 0cch, 00ch, 038h, 060h, 0cch, 0fch, 000h, 078h, 0cch, 00ch, 038h, 00ch, 0cch, 078h, 000h
   150 00014F71 CC0C380CCC7800      <1>
   151 00014F78 1C3C6CCCFE0C1E00FC- <1>     db  01ch, 03ch, 06ch, 0cch, 0feh, 00ch, 01eh, 000h, 0fch, 0c0h, 0f8h, 00ch, 00ch, 0cch, 078h, 000h
   151 00014F81 C0F80C0CCC7800      <1>
   152 00014F88 3860C0F8CCCC7800FC- <1>     db  038h, 060h, 0c0h, 0f8h, 0cch, 0cch, 078h, 000h, 0fch, 0cch, 00ch, 018h, 030h, 030h, 030h, 000h
   152 00014F91 CC0C1830303000      <1>
   153 00014F98 78CCCC78CCCC780078- <1>     db  078h, 0cch, 0cch, 078h, 0cch, 0cch, 078h, 000h, 078h, 0cch, 0cch, 07ch, 00ch, 018h, 070h, 000h
   153 00014FA1 CCCC7C0C187000      <1>
   154 00014FA8 003030000030300000- <1>     db  000h, 030h, 030h, 000h, 000h, 030h, 030h, 000h, 000h, 030h, 030h, 000h, 000h, 030h, 030h, 060h
   154 00014FB1 30300000303060      <1>
   155 00014FB8 183060C06030180000- <1>     db  018h, 030h, 060h, 0c0h, 060h, 030h, 018h, 000h, 000h, 000h, 0fch, 000h, 000h, 0fch, 000h, 000h
   155 00014FC1 00FC0000FC0000      <1>
   156 00014FC8 6030180C1830600078- <1>     db  060h, 030h, 018h, 00ch, 018h, 030h, 060h, 000h, 078h, 0cch, 00ch, 018h, 030h, 000h, 030h, 000h
   156 00014FD1 CC0C1830003000      <1>
   157 00014FD8 7CC6DEDEDEC0780030- <1>     db  07ch, 0c6h, 0deh, 0deh, 0deh, 0c0h, 078h, 000h, 030h, 078h, 0cch, 0cch, 0fch, 0cch, 0cch, 000h
   157 00014FE1 78CCCCFCCCCC00      <1>
   158 00014FE8 FC66667C6666FC003C- <1>     db  0fch, 066h, 066h, 07ch, 066h, 066h, 0fch, 000h, 03ch, 066h, 0c0h, 0c0h, 0c0h, 066h, 03ch, 000h
   158 00014FF1 66C0C0C0663C00      <1>
   159 00014FF8 F86C6666666CF800FE- <1>     db  0f8h, 06ch, 066h, 066h, 066h, 06ch, 0f8h, 000h, 0feh, 062h, 068h, 078h, 068h, 062h, 0feh, 000h
   159 00015001 6268786862FE00      <1>
   160 00015008 FE6268786860F0003C- <1>     db  0feh, 062h, 068h, 078h, 068h, 060h, 0f0h, 000h, 03ch, 066h, 0c0h, 0c0h, 0ceh, 066h, 03eh, 000h
   160 00015011 66C0C0CE663E00      <1>
   161 00015018 CCCCCCFCCCCCCC0078- <1>     db  0cch, 0cch, 0cch, 0fch, 0cch, 0cch, 0cch, 000h, 078h, 030h, 030h, 030h, 030h, 030h, 078h, 000h
   161 00015021 30303030307800      <1>
   162 00015028 1E0C0C0CCCCC7800E6- <1>     db  01eh, 00ch, 00ch, 00ch, 0cch, 0cch, 078h, 000h, 0e6h, 066h, 06ch, 078h, 06ch, 066h, 0e6h, 000h
   162 00015031 666C786C66E600      <1>
   163 00015038 F06060606266FE00C6- <1>     db  0f0h, 060h, 060h, 060h, 062h, 066h, 0feh, 000h, 0c6h, 0eeh, 0feh, 0feh, 0d6h, 0c6h, 0c6h, 000h
   163 00015041 EEFEFED6C6C600      <1>
   164 00015048 C6E6F6DECEC6C60038- <1>     db  0c6h, 0e6h, 0f6h, 0deh, 0ceh, 0c6h, 0c6h, 000h, 038h, 06ch, 0c6h, 0c6h, 0c6h, 06ch, 038h, 000h
   164 00015051 6CC6C6C66C3800      <1>
   165 00015058 FC66667C6060F00078- <1>     db  0fch, 066h, 066h, 07ch, 060h, 060h, 0f0h, 000h, 078h, 0cch, 0cch, 0cch, 0dch, 078h, 01ch, 000h
   165 00015061 CCCCCCDC781C00      <1>
   166 00015068 FC66667C6C66E60078- <1>     db  0fch, 066h, 066h, 07ch, 06ch, 066h, 0e6h, 000h, 078h, 0cch, 0e0h, 070h, 01ch, 0cch, 078h, 000h
   166 00015071 CCE0701CCC7800      <1>
   167 00015078 FCB4303030307800CC- <1>     db  0fch, 0b4h, 030h, 030h, 030h, 030h, 078h, 000h, 0cch, 0cch, 0cch, 0cch, 0cch, 0cch, 0fch, 000h
   167 00015081 CCCCCCCCCCFC00      <1>
   168 00015088 CCCCCCCCCC783000C6- <1>     db  0cch, 0cch, 0cch, 0cch, 0cch, 078h, 030h, 000h, 0c6h, 0c6h, 0c6h, 0d6h, 0feh, 0eeh, 0c6h, 000h
   168 00015091 C6C6D6FEEEC600      <1>
   169 00015098 C6C66C38386CC600CC- <1>     db  0c6h, 0c6h, 06ch, 038h, 038h, 06ch, 0c6h, 000h, 0cch, 0cch, 0cch, 078h, 030h, 030h, 078h, 000h
   169 000150A1 CCCC7830307800      <1>
   170 000150A8 FEC68C183266FE0078- <1>     db  0feh, 0c6h, 08ch, 018h, 032h, 066h, 0feh, 000h, 078h, 060h, 060h, 060h, 060h, 060h, 078h, 000h
   170 000150B1 60606060607800      <1>
   171 000150B8 C06030180C06020078- <1>     db  0c0h, 060h, 030h, 018h, 00ch, 006h, 002h, 000h, 078h, 018h, 018h, 018h, 018h, 018h, 078h, 000h
   171 000150C1 18181818187800      <1>
   172 000150C8 10386CC60000000000- <1>     db  010h, 038h, 06ch, 0c6h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0ffh
   172 000150D1 000000000000FF      <1>
   173 000150D8 303018000000000000- <1>     db  030h, 030h, 018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 078h, 00ch, 07ch, 0cch, 076h, 000h
   173 000150E1 00780C7CCC7600      <1>
   174 000150E8 E060607C6666DC0000- <1>     db  0e0h, 060h, 060h, 07ch, 066h, 066h, 0dch, 000h, 000h, 000h, 078h, 0cch, 0c0h, 0cch, 078h, 000h
   174 000150F1 0078CCC0CC7800      <1>
   175 000150F8 1C0C0C7CCCCC760000- <1>     db  01ch, 00ch, 00ch, 07ch, 0cch, 0cch, 076h, 000h, 000h, 000h, 078h, 0cch, 0fch, 0c0h, 078h, 000h
   175 00015101 0078CCFCC07800      <1>
   176 00015108 386C60F06060F00000- <1>     db  038h, 06ch, 060h, 0f0h, 060h, 060h, 0f0h, 000h, 000h, 000h, 076h, 0cch, 0cch, 07ch, 00ch, 0f8h
   176 00015111 0076CCCC7C0CF8      <1>
   177 00015118 E0606C766666E60030- <1>     db  0e0h, 060h, 06ch, 076h, 066h, 066h, 0e6h, 000h, 030h, 000h, 070h, 030h, 030h, 030h, 078h, 000h
   177 00015121 00703030307800      <1>
   178 00015128 0C000C0C0CCCCC78E0- <1>     db  00ch, 000h, 00ch, 00ch, 00ch, 0cch, 0cch, 078h, 0e0h, 060h, 066h, 06ch, 078h, 06ch, 0e6h, 000h
   178 00015131 60666C786CE600      <1>
   179 00015138 703030303030780000- <1>     db  070h, 030h, 030h, 030h, 030h, 030h, 078h, 000h, 000h, 000h, 0cch, 0feh, 0feh, 0d6h, 0c6h, 000h
   179 00015141 00CCFEFED6C600      <1>
   180 00015148 0000F8CCCCCCCC0000- <1>     db  000h, 000h, 0f8h, 0cch, 0cch, 0cch, 0cch, 000h, 000h, 000h, 078h, 0cch, 0cch, 0cch, 078h, 000h
   180 00015151 0078CCCCCC7800      <1>
   181 00015158 0000DC66667C60F000- <1>     db  000h, 000h, 0dch, 066h, 066h, 07ch, 060h, 0f0h, 000h, 000h, 076h, 0cch, 0cch, 07ch, 00ch, 01eh
   181 00015161 0076CCCC7C0C1E      <1>
   182 00015168 0000DC766660F00000- <1>     db  000h, 000h, 0dch, 076h, 066h, 060h, 0f0h, 000h, 000h, 000h, 07ch, 0c0h, 078h, 00ch, 0f8h, 000h
   182 00015171 007CC0780CF800      <1>
   183 00015178 10307C303034180000- <1>     db  010h, 030h, 07ch, 030h, 030h, 034h, 018h, 000h, 000h, 000h, 0cch, 0cch, 0cch, 0cch, 076h, 000h
   183 00015181 00CCCCCCCC7600      <1>
   184 00015188 0000CCCCCC78300000- <1>     db  000h, 000h, 0cch, 0cch, 0cch, 078h, 030h, 000h, 000h, 000h, 0c6h, 0d6h, 0feh, 0feh, 06ch, 000h
   184 00015191 00C6D6FEFE6C00      <1>
   185 00015198 0000C66C386CC60000- <1>     db  000h, 000h, 0c6h, 06ch, 038h, 06ch, 0c6h, 000h, 000h, 000h, 0cch, 0cch, 0cch, 07ch, 00ch, 0f8h
   185 000151A1 00CCCCCC7C0CF8      <1>
   186 000151A8 0000FC983064FC001C- <1>     db  000h, 000h, 0fch, 098h, 030h, 064h, 0fch, 000h, 01ch, 030h, 030h, 0e0h, 030h, 030h, 01ch, 000h
   186 000151B1 3030E030301C00      <1>
   187 000151B8 1818180018181800E0- <1>     db  018h, 018h, 018h, 000h, 018h, 018h, 018h, 000h, 0e0h, 030h, 030h, 01ch, 030h, 030h, 0e0h, 000h
   187 000151C1 30301C3030E000      <1>
   188 000151C8 76DC00000000000000- <1>     db  076h, 0dch, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 010h, 038h, 06ch, 0c6h, 0c6h, 0feh, 000h
   188 000151D1 10386CC6C6FE00      <1>
   189 000151D8 78CCC0CC78180C7800- <1>     db  078h, 0cch, 0c0h, 0cch, 078h, 018h, 00ch, 078h, 000h, 0cch, 000h, 0cch, 0cch, 0cch, 07eh, 000h
   189 000151E1 CC00CCCCCC7E00      <1>
   190 000151E8 1C0078CCFCC078007E- <1>     db  01ch, 000h, 078h, 0cch, 0fch, 0c0h, 078h, 000h, 07eh, 0c3h, 03ch, 006h, 03eh, 066h, 03fh, 000h
   190 000151F1 C33C063E663F00      <1>
   191 000151F8 CC00780C7CCC7E00E0- <1>     db  0cch, 000h, 078h, 00ch, 07ch, 0cch, 07eh, 000h, 0e0h, 000h, 078h, 00ch, 07ch, 0cch, 07eh, 000h
   191 00015201 00780C7CCC7E00      <1>
   192 00015208 3030780C7CCC7E0000- <1>     db  030h, 030h, 078h, 00ch, 07ch, 0cch, 07eh, 000h, 000h, 000h, 078h, 0c0h, 0c0h, 078h, 00ch, 038h
   192 00015211 0078C0C0780C38      <1>
   193 00015218 7EC33C667E603C00CC- <1>     db  07eh, 0c3h, 03ch, 066h, 07eh, 060h, 03ch, 000h, 0cch, 000h, 078h, 0cch, 0fch, 0c0h, 078h, 000h
   193 00015221 0078CCFCC07800      <1>
   194 00015228 E00078CCFCC07800CC- <1>     db  0e0h, 000h, 078h, 0cch, 0fch, 0c0h, 078h, 000h, 0cch, 000h, 070h, 030h, 030h, 030h, 078h, 000h
   194 00015231 00703030307800      <1>
   195 00015238 7CC6381818183C00E0- <1>     db  07ch, 0c6h, 038h, 018h, 018h, 018h, 03ch, 000h, 0e0h, 000h, 070h, 030h, 030h, 030h, 078h, 000h
   195 00015241 00703030307800      <1>
   196 00015248 C6386CC6FEC6C60030- <1>     db  0c6h, 038h, 06ch, 0c6h, 0feh, 0c6h, 0c6h, 000h, 030h, 030h, 000h, 078h, 0cch, 0fch, 0cch, 000h
   196 00015251 300078CCFCCC00      <1>
   197 00015258 1C00FC607860FC0000- <1>     db  01ch, 000h, 0fch, 060h, 078h, 060h, 0fch, 000h, 000h, 000h, 07fh, 00ch, 07fh, 0cch, 07fh, 000h
   197 00015261 007F0C7FCC7F00      <1>
   198 00015268 3E6CCCFECCCCCE0078- <1>     db  03eh, 06ch, 0cch, 0feh, 0cch, 0cch, 0ceh, 000h, 078h, 0cch, 000h, 078h, 0cch, 0cch, 078h, 000h
   198 00015271 CC0078CCCC7800      <1>
   199 00015278 00CC0078CCCC780000- <1>     db  000h, 0cch, 000h, 078h, 0cch, 0cch, 078h, 000h, 000h, 0e0h, 000h, 078h, 0cch, 0cch, 078h, 000h
   199 00015281 E00078CCCC7800      <1>
   200 00015288 78CC00CCCCCC7E0000- <1>     db  078h, 0cch, 000h, 0cch, 0cch, 0cch, 07eh, 000h, 000h, 0e0h, 000h, 0cch, 0cch, 0cch, 07eh, 000h
   200 00015291 E000CCCCCC7E00      <1>
   201 00015298 00CC00CCCC7C0CF8C3- <1>     db  000h, 0cch, 000h, 0cch, 0cch, 07ch, 00ch, 0f8h, 0c3h, 018h, 03ch, 066h, 066h, 03ch, 018h, 000h
   201 000152A1 183C66663C1800      <1>
   202 000152A8 CC00CCCCCCCC780018- <1>     db  0cch, 000h, 0cch, 0cch, 0cch, 0cch, 078h, 000h, 018h, 018h, 07eh, 0c0h, 0c0h, 07eh, 018h, 018h
   202 000152B1 187EC0C07E1818      <1>
   203 000152B8 386C64F060E6FC00CC- <1>     db  038h, 06ch, 064h, 0f0h, 060h, 0e6h, 0fch, 000h, 0cch, 0cch, 078h, 0fch, 030h, 0fch, 030h, 030h
   203 000152C1 CC78FC30FC3030      <1>
   204 000152C8 F8CCCCFAC6CFC6C70E- <1>     db  0f8h, 0cch, 0cch, 0fah, 0c6h, 0cfh, 0c6h, 0c7h, 00eh, 01bh, 018h, 03ch, 018h, 018h, 0d8h, 070h
   204 000152D1 1B183C1818D870      <1>
   205 000152D8 1C00780C7CCC7E0038- <1>     db  01ch, 000h, 078h, 00ch, 07ch, 0cch, 07eh, 000h, 038h, 000h, 070h, 030h, 030h, 030h, 078h, 000h
   205 000152E1 00703030307800      <1>
   206 000152E8 001C0078CCCC780000- <1>     db  000h, 01ch, 000h, 078h, 0cch, 0cch, 078h, 000h, 000h, 01ch, 000h, 0cch, 0cch, 0cch, 07eh, 000h
   206 000152F1 1C00CCCCCC7E00      <1>
   207 000152F8 00F800F8CCCCCC00FC- <1>     db  000h, 0f8h, 000h, 0f8h, 0cch, 0cch, 0cch, 000h, 0fch, 000h, 0cch, 0ech, 0fch, 0dch, 0cch, 000h
   207 00015301 00CCECFCDCCC00      <1>
   208 00015308 3C6C6C3E007E000038- <1>     db  03ch, 06ch, 06ch, 03eh, 000h, 07eh, 000h, 000h, 038h, 06ch, 06ch, 038h, 000h, 07ch, 000h, 000h
   208 00015311 6C6C38007C0000      <1>
   209 00015318 30003060C0CC780000- <1>     db  030h, 000h, 030h, 060h, 0c0h, 0cch, 078h, 000h, 000h, 000h, 000h, 0fch, 0c0h, 0c0h, 000h, 000h
   209 00015321 0000FCC0C00000      <1>
   210 00015328 000000FC0C0C0000C3- <1>     db  000h, 000h, 000h, 0fch, 00ch, 00ch, 000h, 000h, 0c3h, 0c6h, 0cch, 0deh, 033h, 066h, 0cch, 00fh
   210 00015331 C6CCDE3366CC0F      <1>
   211 00015338 C3C6CCDB376FCF0318- <1>     db  0c3h, 0c6h, 0cch, 0dbh, 037h, 06fh, 0cfh, 003h, 018h, 018h, 000h, 018h, 018h, 018h, 018h, 000h
   211 00015341 18001818181800      <1>
   212 00015348 003366CC6633000000- <1>     db  000h, 033h, 066h, 0cch, 066h, 033h, 000h, 000h, 000h, 0cch, 066h, 033h, 066h, 0cch, 000h, 000h
   212 00015351 CC663366CC0000      <1>
   213 00015358 228822882288228855- <1>     db  022h, 088h, 022h, 088h, 022h, 088h, 022h, 088h, 055h, 0aah, 055h, 0aah, 055h, 0aah, 055h, 0aah
   213 00015361 AA55AA55AA55AA      <1>
   214 00015368 DB77DBEEDB77DBEE18- <1>     db  0dbh, 077h, 0dbh, 0eeh, 0dbh, 077h, 0dbh, 0eeh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   214 00015371 18181818181818      <1>
   215 00015378 18181818F818181818- <1>     db  018h, 018h, 018h, 018h, 0f8h, 018h, 018h, 018h, 018h, 018h, 0f8h, 018h, 0f8h, 018h, 018h, 018h
   215 00015381 18F818F8181818      <1>
   216 00015388 36363636F636363600- <1>     db  036h, 036h, 036h, 036h, 0f6h, 036h, 036h, 036h, 000h, 000h, 000h, 000h, 0feh, 036h, 036h, 036h
   216 00015391 000000FE363636      <1>
   217 00015398 0000F818F818181836- <1>     db  000h, 000h, 0f8h, 018h, 0f8h, 018h, 018h, 018h, 036h, 036h, 0f6h, 006h, 0f6h, 036h, 036h, 036h
   217 000153A1 36F606F6363636      <1>
   218 000153A8 363636363636363600- <1>     db  036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 000h, 000h, 0feh, 006h, 0f6h, 036h, 036h, 036h
   218 000153B1 00FE06F6363636      <1>
   219 000153B8 3636F606FE00000036- <1>     db  036h, 036h, 0f6h, 006h, 0feh, 000h, 000h, 000h, 036h, 036h, 036h, 036h, 0feh, 000h, 000h, 000h
   219 000153C1 363636FE000000      <1>
   220 000153C8 1818F818F800000000- <1>     db  018h, 018h, 0f8h, 018h, 0f8h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0f8h, 018h, 018h, 018h
   220 000153D1 000000F8181818      <1>
   221 000153D8 181818181F00000018- <1>     db  018h, 018h, 018h, 018h, 01fh, 000h, 000h, 000h, 018h, 018h, 018h, 018h, 0ffh, 000h, 000h, 000h
   221 000153E1 181818FF000000      <1>
   222 000153E8 00000000FF18181818- <1>     db  000h, 000h, 000h, 000h, 0ffh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 01fh, 018h, 018h, 018h
   222 000153F1 1818181F181818      <1>
   223 000153F8 00000000FF00000018- <1>     db  000h, 000h, 000h, 000h, 0ffh, 000h, 000h, 000h, 018h, 018h, 018h, 018h, 0ffh, 018h, 018h, 018h
   223 00015401 181818FF181818      <1>
   224 00015408 18181F181F18181836- <1>     db  018h, 018h, 01fh, 018h, 01fh, 018h, 018h, 018h, 036h, 036h, 036h, 036h, 037h, 036h, 036h, 036h
   224 00015411 36363637363636      <1>
   225 00015418 363637303F00000000- <1>     db  036h, 036h, 037h, 030h, 03fh, 000h, 000h, 000h, 000h, 000h, 03fh, 030h, 037h, 036h, 036h, 036h
   225 00015421 003F3037363636      <1>
   226 00015428 3636F700FF00000000- <1>     db  036h, 036h, 0f7h, 000h, 0ffh, 000h, 000h, 000h, 000h, 000h, 0ffh, 000h, 0f7h, 036h, 036h, 036h
   226 00015431 00FF00F7363636      <1>
   227 00015438 363637303736363600- <1>     db  036h, 036h, 037h, 030h, 037h, 036h, 036h, 036h, 000h, 000h, 0ffh, 000h, 0ffh, 000h, 000h, 000h
   227 00015441 00FF00FF000000      <1>
   228 00015448 3636F700F736363618- <1>     db  036h, 036h, 0f7h, 000h, 0f7h, 036h, 036h, 036h, 018h, 018h, 0ffh, 000h, 0ffh, 000h, 000h, 000h
   228 00015451 18FF00FF000000      <1>
   229 00015458 36363636FF00000000- <1>     db  036h, 036h, 036h, 036h, 0ffh, 000h, 000h, 000h, 000h, 000h, 0ffh, 000h, 0ffh, 018h, 018h, 018h
   229 00015461 00FF00FF181818      <1>
   230 00015468 00000000FF36363636- <1>     db  000h, 000h, 000h, 000h, 0ffh, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 03fh, 000h, 000h, 000h
   230 00015471 3636363F000000      <1>
   231 00015478 18181F181F00000000- <1>     db  018h, 018h, 01fh, 018h, 01fh, 000h, 000h, 000h, 000h, 000h, 01fh, 018h, 01fh, 018h, 018h, 018h
   231 00015481 001F181F181818      <1>
   232 00015488 000000003F36363636- <1>     db  000h, 000h, 000h, 000h, 03fh, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 0ffh, 036h, 036h, 036h
   232 00015491 363636FF363636      <1>
   233 00015498 1818FF18FF18181818- <1>     db  018h, 018h, 0ffh, 018h, 0ffh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 0f8h, 000h, 000h, 000h
   233 000154A1 181818F8000000      <1>
   234 000154A8 000000001F181818FF- <1>     db  000h, 000h, 000h, 000h, 01fh, 018h, 018h, 018h, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh
   234 000154B1 FFFFFFFFFFFFFF      <1>
   235 000154B8 00000000FFFFFFFFF0- <1>     db  000h, 000h, 000h, 000h, 0ffh, 0ffh, 0ffh, 0ffh, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h
   235 000154C1 F0F0F0F0F0F0F0      <1>
   236 000154C8 0F0F0F0F0F0F0F0FFF- <1>     db  00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 0ffh, 0ffh, 0ffh, 0ffh, 000h, 000h, 000h, 000h
   236 000154D1 FFFFFF00000000      <1>
   237 000154D8 000076DCC8DC760000- <1>     db  000h, 000h, 076h, 0dch, 0c8h, 0dch, 076h, 000h, 000h, 078h, 0cch, 0f8h, 0cch, 0f8h, 0c0h, 0c0h
   237 000154E1 78CCF8CCF8C0C0      <1>
   238 000154E8 00FCCCC0C0C0C00000- <1>     db  000h, 0fch, 0cch, 0c0h, 0c0h, 0c0h, 0c0h, 000h, 000h, 0feh, 06ch, 06ch, 06ch, 06ch, 06ch, 000h
   238 000154F1 FE6C6C6C6C6C00      <1>
   239 000154F8 FCCC603060CCFC0000- <1>     db  0fch, 0cch, 060h, 030h, 060h, 0cch, 0fch, 000h, 000h, 000h, 07eh, 0d8h, 0d8h, 0d8h, 070h, 000h
   239 00015501 007ED8D8D87000      <1>
   240 00015508 00666666667C60C000- <1>     db  000h, 066h, 066h, 066h, 066h, 07ch, 060h, 0c0h, 000h, 076h, 0dch, 018h, 018h, 018h, 018h, 000h
   240 00015511 76DC1818181800      <1>
   241 00015518 FC3078CCCC7830FC38- <1>     db  0fch, 030h, 078h, 0cch, 0cch, 078h, 030h, 0fch, 038h, 06ch, 0c6h, 0feh, 0c6h, 06ch, 038h, 000h
   241 00015521 6CC6FEC66C3800      <1>
   242 00015528 386CC6C66C6CEE001C- <1>     db  038h, 06ch, 0c6h, 0c6h, 06ch, 06ch, 0eeh, 000h, 01ch, 030h, 018h, 07ch, 0cch, 0cch, 078h, 000h
   242 00015531 30187CCCCC7800      <1>
   243 00015538 00007EDBDB7E000006- <1>     db  000h, 000h, 07eh, 0dbh, 0dbh, 07eh, 000h, 000h, 006h, 00ch, 07eh, 0dbh, 0dbh, 07eh, 060h, 0c0h
   243 00015541 0C7EDBDB7E60C0      <1>
   244 00015548 3860C0F8C060380078- <1>     db  038h, 060h, 0c0h, 0f8h, 0c0h, 060h, 038h, 000h, 078h, 0cch, 0cch, 0cch, 0cch, 0cch, 0cch, 000h
   244 00015551 CCCCCCCCCCCC00      <1>
   245 00015558 00FC00FC00FC000030- <1>     db  000h, 0fch, 000h, 0fch, 000h, 0fch, 000h, 000h, 030h, 030h, 0fch, 030h, 030h, 000h, 0fch, 000h
   245 00015561 30FC303000FC00      <1>
   246 00015568 603018306000FC0018- <1>     db  060h, 030h, 018h, 030h, 060h, 000h, 0fch, 000h, 018h, 030h, 060h, 030h, 018h, 000h, 0fch, 000h
   246 00015571 3060301800FC00      <1>
   247 00015578 0E1B1B181818181818- <1>     db  00eh, 01bh, 01bh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 0d8h, 0d8h, 070h
   247 00015581 18181818D8D870      <1>
   248 00015588 303000FC0030300000- <1>     db  030h, 030h, 000h, 0fch, 000h, 030h, 030h, 000h, 000h, 076h, 0dch, 000h, 076h, 0dch, 000h, 000h
   248 00015591 76DC0076DC0000      <1>
   249 00015598 386C6C380000000000- <1>     db  038h, 06ch, 06ch, 038h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 018h, 018h, 000h, 000h, 000h
   249 000155A1 00001818000000      <1>
   250 000155A8 00000000180000000F- <1>     db  000h, 000h, 000h, 000h, 018h, 000h, 000h, 000h, 00fh, 00ch, 00ch, 00ch, 0ech, 06ch, 03ch, 01ch
   250 000155B1 0C0C0CEC6C3C1C      <1>
   251 000155B8 786C6C6C6C00000070- <1>     db  078h, 06ch, 06ch, 06ch, 06ch, 000h, 000h, 000h, 070h, 018h, 030h, 060h, 078h, 000h, 000h, 000h
   251 000155C1 18306078000000      <1>
   252 000155C8 00003C3C3C3C000000- <1>     db  000h, 000h, 03ch, 03ch, 03ch, 03ch, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   252 000155D1 00000000000000      <1>
   253                              <1> vgafont14:
   254 000155D8 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   254 000155E1 00000000000000      <1>
   255 000155E8 7E81A58181BD99817E- <1>     db  07eh, 081h, 0a5h, 081h, 081h, 0bdh, 099h, 081h, 07eh, 000h, 000h, 000h, 000h, 000h, 07eh, 0ffh
   255 000155F1 00000000007EFF      <1>
   256 000155F8 DBFFFFC3E7FF7E0000- <1>     db  0dbh, 0ffh, 0ffh, 0c3h, 0e7h, 0ffh, 07eh, 000h, 000h, 000h, 000h, 000h, 000h, 06ch, 0feh, 0feh
   256 00015601 000000006CFEFE      <1>
   257 00015608 FEFE7C381000000000- <1>     db  0feh, 0feh, 07ch, 038h, 010h, 000h, 000h, 000h, 000h, 000h, 000h, 010h, 038h, 07ch, 0feh, 07ch
   257 00015611 000010387CFE7C      <1>
   258 00015618 381000000000000018- <1>     db  038h, 010h, 000h, 000h, 000h, 000h, 000h, 000h, 018h, 03ch, 03ch, 0e7h, 0e7h, 0e7h, 018h, 018h
   258 00015621 3C3CE7E7E71818      <1>
   259 00015628 3C0000000000183C7E- <1>     db  03ch, 000h, 000h, 000h, 000h, 000h, 018h, 03ch, 07eh, 0ffh, 0ffh, 07eh, 018h, 018h, 03ch, 000h
   259 00015631 FFFF7E18183C00      <1>
   260 00015638 00000000000000183C- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 018h, 03ch, 03ch, 018h, 000h, 000h, 000h, 000h, 000h
   260 00015641 3C180000000000      <1>
   261 00015648 FFFFFFFFFFE7C3C3E7- <1>     db  0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0e7h, 0c3h, 0c3h, 0e7h, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 000h, 000h
   261 00015651 FFFFFFFFFF0000      <1>
   262 00015658 00003C664242663C00- <1>     db  000h, 000h, 03ch, 066h, 042h, 042h, 066h, 03ch, 000h, 000h, 000h, 000h, 0ffh, 0ffh, 0ffh, 0ffh
   262 00015661 000000FFFFFFFF      <1>
   263 00015668 C399BDBD99C3FFFFFF- <1>     db  0c3h, 099h, 0bdh, 0bdh, 099h, 0c3h, 0ffh, 0ffh, 0ffh, 0ffh, 000h, 000h, 01eh, 00eh, 01ah, 032h
   263 00015671 FF00001E0E1A32      <1>
   264 00015678 78CCCCCC7800000000- <1>     db  078h, 0cch, 0cch, 0cch, 078h, 000h, 000h, 000h, 000h, 000h, 03ch, 066h, 066h, 066h, 03ch, 018h
   264 00015681 003C6666663C18      <1>
   265 00015688 7E181800000000003F- <1>     db  07eh, 018h, 018h, 000h, 000h, 000h, 000h, 000h, 03fh, 033h, 03fh, 030h, 030h, 030h, 070h, 0f0h
   265 00015691 333F30303070F0      <1>
   266 00015698 E000000000007F637F- <1>     db  0e0h, 000h, 000h, 000h, 000h, 000h, 07fh, 063h, 07fh, 063h, 063h, 063h, 067h, 0e7h, 0e6h, 0c0h
   266 000156A1 63636367E7E6C0      <1>
   267 000156A8 000000001818DB3CE7- <1>     db  000h, 000h, 000h, 000h, 018h, 018h, 0dbh, 03ch, 0e7h, 03ch, 0dbh, 018h, 018h, 000h, 000h, 000h
   267 000156B1 3CDB1818000000      <1>
   268 000156B8 000080C0E0F8FEF8E0- <1>     db  000h, 000h, 080h, 0c0h, 0e0h, 0f8h, 0feh, 0f8h, 0e0h, 0c0h, 080h, 000h, 000h, 000h, 000h, 000h
   268 000156C1 C0800000000000      <1>
   269 000156C8 02060E3EFE3E0E0602- <1>     db  002h, 006h, 00eh, 03eh, 0feh, 03eh, 00eh, 006h, 002h, 000h, 000h, 000h, 000h, 000h, 018h, 03ch
   269 000156D1 0000000000183C      <1>
   270 000156D8 7E1818187E3C180000- <1>     db  07eh, 018h, 018h, 018h, 07eh, 03ch, 018h, 000h, 000h, 000h, 000h, 000h, 066h, 066h, 066h, 066h
   270 000156E1 00000066666666      <1>
   271 000156E8 666600666600000000- <1>     db  066h, 066h, 000h, 066h, 066h, 000h, 000h, 000h, 000h, 000h, 07fh, 0dbh, 0dbh, 0dbh, 07bh, 01bh
   271 000156F1 007FDBDBDB7B1B      <1>
   272 000156F8 1B1B1B000000007CC6- <1>     db  01bh, 01bh, 01bh, 000h, 000h, 000h, 000h, 07ch, 0c6h, 060h, 038h, 06ch, 0c6h, 0c6h, 06ch, 038h
   272 00015701 60386CC6C66C38      <1>
   273 00015708 0CC67C000000000000- <1>     db  00ch, 0c6h, 07ch, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0feh, 0feh, 0feh, 000h
   273 00015711 000000FEFEFE00      <1>
   274 00015718 00000000183C7E1818- <1>     db  000h, 000h, 000h, 000h, 018h, 03ch, 07eh, 018h, 018h, 018h, 07eh, 03ch, 018h, 07eh, 000h, 000h
   274 00015721 187E3C187E0000      <1>
   275 00015728 0000183C7E18181818- <1>     db  000h, 000h, 018h, 03ch, 07eh, 018h, 018h, 018h, 018h, 018h, 018h, 000h, 000h, 000h, 000h, 000h
   275 00015731 18180000000000      <1>
   276 00015738 1818181818187E3C18- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 07eh, 03ch, 018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   276 00015741 00000000000000      <1>
   277 00015748 180CFE0C1800000000- <1>     db  018h, 00ch, 0feh, 00ch, 018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 030h, 060h
   277 00015751 00000000003060      <1>
   278 00015758 FE6030000000000000- <1>     db  0feh, 060h, 030h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0c0h, 0c0h, 0c0h
   278 00015761 00000000C0C0C0      <1>
   279 00015768 FE0000000000000000- <1>     db  0feh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 028h, 06ch, 0feh, 06ch, 028h, 000h
   279 00015771 00286CFE6C2800      <1>
   280 00015778 000000000000001038- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 010h, 038h, 038h, 07ch, 07ch, 0feh, 0feh, 000h, 000h
   280 00015781 387C7CFEFE0000      <1>
   281 00015788 0000000000FEFE7C7C- <1>     db  000h, 000h, 000h, 000h, 000h, 0feh, 0feh, 07ch, 07ch, 038h, 038h, 010h, 000h, 000h, 000h, 000h
   281 00015791 38381000000000      <1>
   282 00015798 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   282 000157A1 00000000000000      <1>
   283 000157A8 183C3C3C1818001818- <1>     db  018h, 03ch, 03ch, 03ch, 018h, 018h, 000h, 018h, 018h, 000h, 000h, 000h, 000h, 066h, 066h, 066h
   283 000157B1 00000000666666      <1>
   284 000157B8 240000000000000000- <1>     db  024h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 06ch, 06ch, 0feh, 06ch
   284 000157C1 0000006C6CFE6C      <1>
   285 000157C8 6C6CFE6C6C00000018- <1>     db  06ch, 06ch, 0feh, 06ch, 06ch, 000h, 000h, 000h, 018h, 018h, 07ch, 0c6h, 0c2h, 0c0h, 07ch, 006h
   285 000157D1 187CC6C2C07C06      <1>
   286 000157D8 86C67C181800000000- <1>     db  086h, 0c6h, 07ch, 018h, 018h, 000h, 000h, 000h, 000h, 000h, 0c2h, 0c6h, 00ch, 018h, 030h, 066h
   286 000157E1 00C2C60C183066      <1>
   287 000157E8 C60000000000386C6C- <1>     db  0c6h, 000h, 000h, 000h, 000h, 000h, 038h, 06ch, 06ch, 038h, 076h, 0dch, 0cch, 0cch, 076h, 000h
   287 000157F1 3876DCCCCC7600      <1>
   288 000157F8 000000303030600000- <1>     db  000h, 000h, 000h, 030h, 030h, 030h, 060h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   288 00015801 00000000000000      <1>
   289 00015808 00000C183030303030- <1>     db  000h, 000h, 00ch, 018h, 030h, 030h, 030h, 030h, 030h, 018h, 00ch, 000h, 000h, 000h, 000h, 000h
   289 00015811 180C0000000000      <1>
   290 00015818 30180C0C0C0C0C1830- <1>     db  030h, 018h, 00ch, 00ch, 00ch, 00ch, 00ch, 018h, 030h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   290 00015821 00000000000000      <1>
   291 00015828 663CFF3C6600000000- <1>     db  066h, 03ch, 0ffh, 03ch, 066h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 018h, 018h
   291 00015831 00000000001818      <1>
   292 00015838 7E1818000000000000- <1>     db  07eh, 018h, 018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   292 00015841 00000000000000      <1>
   293 00015848 181818300000000000- <1>     db  018h, 018h, 018h, 030h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0feh, 000h, 000h, 000h
   293 00015851 000000FE000000      <1>
   294 00015858 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 018h, 018h, 000h
   294 00015861 00000000181800      <1>
   295 00015868 0000000002060C1830- <1>     db  000h, 000h, 000h, 000h, 002h, 006h, 00ch, 018h, 030h, 060h, 0c0h, 080h, 000h, 000h, 000h, 000h
   295 00015871 60C08000000000      <1>
   296 00015878 00007CC6CEDEF6E6C6- <1>     db  000h, 000h, 07ch, 0c6h, 0ceh, 0deh, 0f6h, 0e6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 000h
   296 00015881 C67C0000000000      <1>
   297 00015888 18387818181818187E- <1>     db  018h, 038h, 078h, 018h, 018h, 018h, 018h, 018h, 07eh, 000h, 000h, 000h, 000h, 000h, 07ch, 0c6h
   297 00015891 00000000007CC6      <1>
   298 00015898 060C183060C6FE0000- <1>     db  006h, 00ch, 018h, 030h, 060h, 0c6h, 0feh, 000h, 000h, 000h, 000h, 000h, 07ch, 0c6h, 006h, 006h
   298 000158A1 0000007CC60606      <1>
   299 000158A8 3C0606C67C00000000- <1>     db  03ch, 006h, 006h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 000h, 00ch, 01ch, 03ch, 06ch, 0cch, 0feh
   299 000158B1 000C1C3C6CCCFE      <1>
   300 000158B8 0C0C1E0000000000FE- <1>     db  00ch, 00ch, 01eh, 000h, 000h, 000h, 000h, 000h, 0feh, 0c0h, 0c0h, 0c0h, 0fch, 006h, 006h, 0c6h
   300 000158C1 C0C0C0FC0606C6      <1>
   301 000158C8 7C00000000003860C0- <1>     db  07ch, 000h, 000h, 000h, 000h, 000h, 038h, 060h, 0c0h, 0c0h, 0fch, 0c6h, 0c6h, 0c6h, 07ch, 000h
   301 000158D1 C0FCC6C6C67C00      <1>
   302 000158D8 00000000FEC6060C18- <1>     db  000h, 000h, 000h, 000h, 0feh, 0c6h, 006h, 00ch, 018h, 030h, 030h, 030h, 030h, 000h, 000h, 000h
   302 000158E1 30303030000000      <1>
   303 000158E8 00007CC6C6C67CC6C6- <1>     db  000h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 07ch, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 000h
   303 000158F1 C67C0000000000      <1>
   304 000158F8 7CC6C6C67E06060C78- <1>     db  07ch, 0c6h, 0c6h, 0c6h, 07eh, 006h, 006h, 00ch, 078h, 000h, 000h, 000h, 000h, 000h, 000h, 018h
   304 00015901 00000000000018      <1>
   305 00015908 180000001818000000- <1>     db  018h, 000h, 000h, 000h, 018h, 018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 018h, 018h, 000h
   305 00015911 00000000181800      <1>
   306 00015918 000018183000000000- <1>     db  000h, 000h, 018h, 018h, 030h, 000h, 000h, 000h, 000h, 000h, 006h, 00ch, 018h, 030h, 060h, 030h
   306 00015921 00060C18306030      <1>
   307 00015928 180C06000000000000- <1>     db  018h, 00ch, 006h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 07eh, 000h, 000h, 07eh, 000h
   307 00015931 00007E00007E00      <1>
   308 00015938 000000000000603018- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 060h, 030h, 018h, 00ch, 006h, 00ch, 018h, 030h, 060h, 000h
   308 00015941 0C060C18306000      <1>
   309 00015948 000000007CC6C60C18- <1>     db  000h, 000h, 000h, 000h, 07ch, 0c6h, 0c6h, 00ch, 018h, 018h, 000h, 018h, 018h, 000h, 000h, 000h
   309 00015951 18001818000000      <1>
   310 00015958 00007CC6C6DEDEDEDC- <1>     db  000h, 000h, 07ch, 0c6h, 0c6h, 0deh, 0deh, 0deh, 0dch, 0c0h, 07ch, 000h, 000h, 000h, 000h, 000h
   310 00015961 C07C0000000000      <1>
   311 00015968 10386CC6C6FEC6C6C6- <1>     db  010h, 038h, 06ch, 0c6h, 0c6h, 0feh, 0c6h, 0c6h, 0c6h, 000h, 000h, 000h, 000h, 000h, 0fch, 066h
   311 00015971 0000000000FC66      <1>
   312 00015978 66667C666666FC0000- <1>     db  066h, 066h, 07ch, 066h, 066h, 066h, 0fch, 000h, 000h, 000h, 000h, 000h, 03ch, 066h, 0c2h, 0c0h
   312 00015981 0000003C66C2C0      <1>
   313 00015988 C0C0C2663C00000000- <1>     db  0c0h, 0c0h, 0c2h, 066h, 03ch, 000h, 000h, 000h, 000h, 000h, 0f8h, 06ch, 066h, 066h, 066h, 066h
   313 00015991 00F86C66666666      <1>
   314 00015998 666CF80000000000FE- <1>     db  066h, 06ch, 0f8h, 000h, 000h, 000h, 000h, 000h, 0feh, 066h, 062h, 068h, 078h, 068h, 062h, 066h
   314 000159A1 66626878686266      <1>
   315 000159A8 FE0000000000FE6662- <1>     db  0feh, 000h, 000h, 000h, 000h, 000h, 0feh, 066h, 062h, 068h, 078h, 068h, 060h, 060h, 0f0h, 000h
   315 000159B1 6878686060F000      <1>
   316 000159B8 000000003C66C2C0C0- <1>     db  000h, 000h, 000h, 000h, 03ch, 066h, 0c2h, 0c0h, 0c0h, 0deh, 0c6h, 066h, 03ah, 000h, 000h, 000h
   316 000159C1 DEC6663A000000      <1>
   317 000159C8 0000C6C6C6C6FEC6C6- <1>     db  000h, 000h, 0c6h, 0c6h, 0c6h, 0c6h, 0feh, 0c6h, 0c6h, 0c6h, 0c6h, 000h, 000h, 000h, 000h, 000h
   317 000159D1 C6C60000000000      <1>
   318 000159D8 3C181818181818183C- <1>     db  03ch, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h, 000h, 01eh, 00ch
   318 000159E1 00000000001E0C      <1>
   319 000159E8 0C0C0C0CCCCC780000- <1>     db  00ch, 00ch, 00ch, 00ch, 0cch, 0cch, 078h, 000h, 000h, 000h, 000h, 000h, 0e6h, 066h, 06ch, 06ch
   319 000159F1 000000E6666C6C      <1>
   320 000159F8 786C6C66E600000000- <1>     db  078h, 06ch, 06ch, 066h, 0e6h, 000h, 000h, 000h, 000h, 000h, 0f0h, 060h, 060h, 060h, 060h, 060h
   320 00015A01 00F06060606060      <1>
   321 00015A08 6266FE0000000000C6- <1>     db  062h, 066h, 0feh, 000h, 000h, 000h, 000h, 000h, 0c6h, 0eeh, 0feh, 0feh, 0d6h, 0c6h, 0c6h, 0c6h
   321 00015A11 EEFEFED6C6C6C6      <1>
   322 00015A18 C60000000000C6E6F6- <1>     db  0c6h, 000h, 000h, 000h, 000h, 000h, 0c6h, 0e6h, 0f6h, 0feh, 0deh, 0ceh, 0c6h, 0c6h, 0c6h, 000h
   322 00015A21 FEDECEC6C6C600      <1>
   323 00015A28 00000000386CC6C6C6- <1>     db  000h, 000h, 000h, 000h, 038h, 06ch, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 06ch, 038h, 000h, 000h, 000h
   323 00015A31 C6C66C38000000      <1>
   324 00015A38 0000FC6666667C6060- <1>     db  000h, 000h, 0fch, 066h, 066h, 066h, 07ch, 060h, 060h, 060h, 0f0h, 000h, 000h, 000h, 000h, 000h
   324 00015A41 60F00000000000      <1>
   325 00015A48 7CC6C6C6C6D6DE7C0C- <1>     db  07ch, 0c6h, 0c6h, 0c6h, 0c6h, 0d6h, 0deh, 07ch, 00ch, 00eh, 000h, 000h, 000h, 000h, 0fch, 066h
   325 00015A51 0E00000000FC66      <1>
   326 00015A58 66667C6C6666E60000- <1>     db  066h, 066h, 07ch, 06ch, 066h, 066h, 0e6h, 000h, 000h, 000h, 000h, 000h, 07ch, 0c6h, 0c6h, 060h
   326 00015A61 0000007CC6C660      <1>
   327 00015A68 380CC6C67C00000000- <1>     db  038h, 00ch, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 000h, 07eh, 07eh, 05ah, 018h, 018h, 018h
   327 00015A71 007E7E5A181818      <1>
   328 00015A78 18183C0000000000C6- <1>     db  018h, 018h, 03ch, 000h, 000h, 000h, 000h, 000h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h
   328 00015A81 C6C6C6C6C6C6C6      <1>
   329 00015A88 7C0000000000C6C6C6- <1>     db  07ch, 000h, 000h, 000h, 000h, 000h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 06ch, 038h, 010h, 000h
   329 00015A91 C6C6C66C381000      <1>
   330 00015A98 00000000C6C6C6C6D6- <1>     db  000h, 000h, 000h, 000h, 0c6h, 0c6h, 0c6h, 0c6h, 0d6h, 0d6h, 0feh, 07ch, 06ch, 000h, 000h, 000h
   330 00015AA1 D6FE7C6C000000      <1>
   331 00015AA8 0000C6C66C3838386C- <1>     db  000h, 000h, 0c6h, 0c6h, 06ch, 038h, 038h, 038h, 06ch, 0c6h, 0c6h, 000h, 000h, 000h, 000h, 000h
   331 00015AB1 C6C60000000000      <1>
   332 00015AB8 666666663C1818183C- <1>     db  066h, 066h, 066h, 066h, 03ch, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h, 000h, 0feh, 0c6h
   332 00015AC1 0000000000FEC6      <1>
   333 00015AC8 8C183060C2C6FE0000- <1>     db  08ch, 018h, 030h, 060h, 0c2h, 0c6h, 0feh, 000h, 000h, 000h, 000h, 000h, 03ch, 030h, 030h, 030h
   333 00015AD1 0000003C303030      <1>
   334 00015AD8 303030303C00000000- <1>     db  030h, 030h, 030h, 030h, 03ch, 000h, 000h, 000h, 000h, 000h, 080h, 0c0h, 0e0h, 070h, 038h, 01ch
   334 00015AE1 0080C0E070381C      <1>
   335 00015AE8 0E060200000000003C- <1>     db  00eh, 006h, 002h, 000h, 000h, 000h, 000h, 000h, 03ch, 00ch, 00ch, 00ch, 00ch, 00ch, 00ch, 00ch
   335 00015AF1 0C0C0C0C0C0C0C      <1>
   336 00015AF8 3C00000010386CC600- <1>     db  03ch, 000h, 000h, 000h, 010h, 038h, 06ch, 0c6h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   336 00015B01 00000000000000      <1>
   337 00015B08 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0ffh, 000h
   337 00015B11 0000000000FF00      <1>
   338 00015B18 303018000000000000- <1>     db  030h, 030h, 018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   338 00015B21 00000000000000      <1>
   339 00015B28 000000780C7CCCCC76- <1>     db  000h, 000h, 000h, 078h, 00ch, 07ch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h, 000h, 0e0h, 060h
   339 00015B31 0000000000E060      <1>
   340 00015B38 60786C6666667C0000- <1>     db  060h, 078h, 06ch, 066h, 066h, 066h, 07ch, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 07ch
   340 00015B41 0000000000007C      <1>
   341 00015B48 C6C0C0C67C00000000- <1>     db  0c6h, 0c0h, 0c0h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 000h, 01ch, 00ch, 00ch, 03ch, 06ch, 0cch
   341 00015B51 001C0C0C3C6CCC      <1>
   342 00015B58 CCCC76000000000000- <1>     db  0cch, 0cch, 076h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 07ch, 0c6h, 0feh, 0c0h, 0c6h
   342 00015B61 00007CC6FEC0C6      <1>
   343 00015B68 7C0000000000386C64- <1>     db  07ch, 000h, 000h, 000h, 000h, 000h, 038h, 06ch, 064h, 060h, 0f0h, 060h, 060h, 060h, 0f0h, 000h
   343 00015B71 60F0606060F000      <1>
   344 00015B78 0000000000000076CC- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 076h, 0cch, 0cch, 0cch, 07ch, 00ch, 0cch, 078h, 000h
   344 00015B81 CCCC7C0CCC7800      <1>
   345 00015B88 0000E060606C766666- <1>     db  000h, 000h, 0e0h, 060h, 060h, 06ch, 076h, 066h, 066h, 066h, 0e6h, 000h, 000h, 000h, 000h, 000h
   345 00015B91 66E60000000000      <1>
   346 00015B98 18180038181818183C- <1>     db  018h, 018h, 000h, 038h, 018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h, 000h, 006h, 006h
   346 00015BA1 00000000000606      <1>
   347 00015BA8 000E0606060666663C- <1>     db  000h, 00eh, 006h, 006h, 006h, 006h, 066h, 066h, 03ch, 000h, 000h, 000h, 0e0h, 060h, 060h, 066h
   347 00015BB1 000000E0606066      <1>
   348 00015BB8 6C786C66E600000000- <1>     db  06ch, 078h, 06ch, 066h, 0e6h, 000h, 000h, 000h, 000h, 000h, 038h, 018h, 018h, 018h, 018h, 018h
   348 00015BC1 00381818181818      <1>
   349 00015BC8 18183C000000000000- <1>     db  018h, 018h, 03ch, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0ech, 0feh, 0d6h, 0d6h, 0d6h
   349 00015BD1 0000ECFED6D6D6      <1>
   350 00015BD8 C60000000000000000- <1>     db  0c6h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0dch, 066h, 066h, 066h, 066h, 066h, 000h
   350 00015BE1 DC666666666600      <1>
   351 00015BE8 000000000000007CC6- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h
   351 00015BF1 C6C6C67C000000      <1>
   352 00015BF8 0000000000DC666666- <1>     db  000h, 000h, 000h, 000h, 000h, 0dch, 066h, 066h, 066h, 07ch, 060h, 060h, 0f0h, 000h, 000h, 000h
   352 00015C01 7C6060F0000000      <1>
   353 00015C08 00000076CCCCCC7C0C- <1>     db  000h, 000h, 000h, 076h, 0cch, 0cch, 0cch, 07ch, 00ch, 00ch, 01eh, 000h, 000h, 000h, 000h, 000h
   353 00015C11 0C1E0000000000      <1>
   354 00015C18 00DC76666060F00000- <1>     db  000h, 0dch, 076h, 066h, 060h, 060h, 0f0h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 07ch
   354 00015C21 0000000000007C      <1>
   355 00015C28 C6701CC67C00000000- <1>     db  0c6h, 070h, 01ch, 0c6h, 07ch, 000h, 000h, 000h, 000h, 000h, 010h, 030h, 030h, 0fch, 030h, 030h
   355 00015C31 00103030FC3030      <1>
   356 00015C38 30361C000000000000- <1>     db  030h, 036h, 01ch, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0cch, 0cch, 0cch, 0cch, 0cch
   356 00015C41 0000CCCCCCCCCC      <1>
   357 00015C48 760000000000000000- <1>     db  076h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 066h, 066h, 066h, 066h, 03ch, 018h, 000h
   357 00015C51 666666663C1800      <1>
   358 00015C58 00000000000000C6C6- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 0c6h, 0c6h, 0d6h, 0d6h, 0feh, 06ch, 000h, 000h, 000h
   358 00015C61 D6D6FE6C000000      <1>
   359 00015C68 0000000000C66C3838- <1>     db  000h, 000h, 000h, 000h, 000h, 0c6h, 06ch, 038h, 038h, 06ch, 0c6h, 000h, 000h, 000h, 000h, 000h
   359 00015C71 6CC60000000000      <1>
   360 00015C78 000000C6C6C6C67E06- <1>     db  000h, 000h, 000h, 0c6h, 0c6h, 0c6h, 0c6h, 07eh, 006h, 00ch, 0f8h, 000h, 000h, 000h, 000h, 000h
   360 00015C81 0CF80000000000      <1>
   361 00015C88 00FECC183066FE0000- <1>     db  000h, 0feh, 0cch, 018h, 030h, 066h, 0feh, 000h, 000h, 000h, 000h, 000h, 00eh, 018h, 018h, 018h
   361 00015C91 0000000E181818      <1>
   362 00015C98 701818180E00000000- <1>     db  070h, 018h, 018h, 018h, 00eh, 000h, 000h, 000h, 000h, 000h, 018h, 018h, 018h, 018h, 000h, 018h
   362 00015CA1 00181818180018      <1>
   363 00015CA8 181818000000000070- <1>     db  018h, 018h, 018h, 000h, 000h, 000h, 000h, 000h, 070h, 018h, 018h, 018h, 00eh, 018h, 018h, 018h
   363 00015CB1 1818180E181818      <1>
   364 00015CB8 70000000000076DC00- <1>     db  070h, 000h, 000h, 000h, 000h, 000h, 076h, 0dch, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   364 00015CC1 00000000000000      <1>
   365 00015CC8 00000000000010386C- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 010h, 038h, 06ch, 0c6h, 0c6h, 0feh, 000h, 000h, 000h, 000h
   365 00015CD1 C6C6FE00000000      <1>
   366 00015CD8 00003C66C2C0C0C266- <1>     db  000h, 000h, 03ch, 066h, 0c2h, 0c0h, 0c0h, 0c2h, 066h, 03ch, 00ch, 006h, 07ch, 000h, 000h, 000h
   366 00015CE1 3C0C067C000000      <1>
   367 00015CE8 CCCC00CCCCCCCCCC76- <1>     db  0cch, 0cch, 000h, 0cch, 0cch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h, 00ch, 018h, 030h
   367 00015CF1 000000000C1830      <1>
   368 00015CF8 007CC6FEC0C67C0000- <1>     db  000h, 07ch, 0c6h, 0feh, 0c0h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 010h, 038h, 06ch, 000h, 078h
   368 00015D01 000010386C0078      <1>
   369 00015D08 0C7CCCCC7600000000- <1>     db  00ch, 07ch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h, 000h, 0cch, 0cch, 000h, 078h, 00ch, 07ch
   369 00015D11 00CCCC00780C7C      <1>
   370 00015D18 CCCC76000000006030- <1>     db  0cch, 0cch, 076h, 000h, 000h, 000h, 000h, 060h, 030h, 018h, 000h, 078h, 00ch, 07ch, 0cch, 0cch
   370 00015D21 1800780C7CCCCC      <1>
   371 00015D28 7600000000386C3800- <1>     db  076h, 000h, 000h, 000h, 000h, 038h, 06ch, 038h, 000h, 078h, 00ch, 07ch, 0cch, 0cch, 076h, 000h
   371 00015D31 780C7CCCCC7600      <1>
   372 00015D38 0000000000003C6660- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 03ch, 066h, 060h, 066h, 03ch, 00ch, 006h, 03ch, 000h, 000h
   372 00015D41 663C0C063C0000      <1>
   373 00015D48 0010386C007CC6FEC0- <1>     db  000h, 010h, 038h, 06ch, 000h, 07ch, 0c6h, 0feh, 0c0h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 000h
   373 00015D51 C67C0000000000      <1>
   374 00015D58 CCCC007CC6FEC0C67C- <1>     db  0cch, 0cch, 000h, 07ch, 0c6h, 0feh, 0c0h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 060h, 030h, 018h
   374 00015D61 00000000603018      <1>
   375 00015D68 007CC6FEC0C67C0000- <1>     db  000h, 07ch, 0c6h, 0feh, 0c0h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 000h, 066h, 066h, 000h, 038h
   375 00015D71 00000066660038      <1>
   376 00015D78 181818183C00000000- <1>     db  018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h, 018h, 03ch, 066h, 000h, 038h, 018h, 018h
   376 00015D81 183C6600381818      <1>
   377 00015D88 18183C000000006030- <1>     db  018h, 018h, 03ch, 000h, 000h, 000h, 000h, 060h, 030h, 018h, 000h, 038h, 018h, 018h, 018h, 018h
   377 00015D91 18003818181818      <1>
   378 00015D98 3C00000000C6C61038- <1>     db  03ch, 000h, 000h, 000h, 000h, 0c6h, 0c6h, 010h, 038h, 06ch, 0c6h, 0c6h, 0feh, 0c6h, 0c6h, 000h
   378 00015DA1 6CC6C6FEC6C600      <1>
   379 00015DA8 0000386C3800386CC6- <1>     db  000h, 000h, 038h, 06ch, 038h, 000h, 038h, 06ch, 0c6h, 0c6h, 0feh, 0c6h, 0c6h, 000h, 000h, 000h
   379 00015DB1 C6FEC6C6000000      <1>
   380 00015DB8 18306000FE66607C60- <1>     db  018h, 030h, 060h, 000h, 0feh, 066h, 060h, 07ch, 060h, 066h, 0feh, 000h, 000h, 000h, 000h, 000h
   380 00015DC1 66FE0000000000      <1>
   381 00015DC8 0000CC76367ED8D86E- <1>     db  000h, 000h, 0cch, 076h, 036h, 07eh, 0d8h, 0d8h, 06eh, 000h, 000h, 000h, 000h, 000h, 03eh, 06ch
   381 00015DD1 00000000003E6C      <1>
   382 00015DD8 CCCCFECCCCCCCE0000- <1>     db  0cch, 0cch, 0feh, 0cch, 0cch, 0cch, 0ceh, 000h, 000h, 000h, 000h, 010h, 038h, 06ch, 000h, 07ch
   382 00015DE1 000010386C007C      <1>
   383 00015DE8 C6C6C6C67C00000000- <1>     db  0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 000h, 0c6h, 0c6h, 000h, 07ch, 0c6h, 0c6h
   383 00015DF1 00C6C6007CC6C6      <1>
   384 00015DF8 C6C67C000000006030- <1>     db  0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 060h, 030h, 018h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h
   384 00015E01 18007CC6C6C6C6      <1>
   385 00015E08 7C000000003078CC00- <1>     db  07ch, 000h, 000h, 000h, 000h, 030h, 078h, 0cch, 000h, 0cch, 0cch, 0cch, 0cch, 0cch, 076h, 000h
   385 00015E11 CCCCCCCCCC7600      <1>
   386 00015E18 00000060301800CCCC- <1>     db  000h, 000h, 000h, 060h, 030h, 018h, 000h, 0cch, 0cch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h
   386 00015E21 CCCCCC76000000      <1>
   387 00015E28 0000C6C600C6C6C6C6- <1>     db  000h, 000h, 0c6h, 0c6h, 000h, 0c6h, 0c6h, 0c6h, 0c6h, 07eh, 006h, 00ch, 078h, 000h, 000h, 0c6h
   387 00015E31 7E060C780000C6      <1>
   388 00015E38 C6386CC6C6C6C66C38- <1>     db  0c6h, 038h, 06ch, 0c6h, 0c6h, 0c6h, 0c6h, 06ch, 038h, 000h, 000h, 000h, 000h, 0c6h, 0c6h, 000h
   388 00015E41 00000000C6C600      <1>
   389 00015E48 C6C6C6C6C6C67C0000- <1>     db  0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 018h, 018h, 03ch, 066h, 060h
   389 00015E51 000018183C6660      <1>
   390 00015E58 60663C181800000000- <1>     db  060h, 066h, 03ch, 018h, 018h, 000h, 000h, 000h, 000h, 038h, 06ch, 064h, 060h, 0f0h, 060h, 060h
   390 00015E61 386C6460F06060      <1>
   391 00015E68 60E6FC000000000066- <1>     db  060h, 0e6h, 0fch, 000h, 000h, 000h, 000h, 000h, 066h, 066h, 03ch, 018h, 07eh, 018h, 07eh, 018h
   391 00015E71 663C187E187E18      <1>
   392 00015E78 1800000000F8CCCCF8- <1>     db  018h, 000h, 000h, 000h, 000h, 0f8h, 0cch, 0cch, 0f8h, 0c4h, 0cch, 0deh, 0cch, 0cch, 0c6h, 000h
   392 00015E81 C4CCDECCCCC600      <1>
   393 00015E88 0000000E1B1818187E- <1>     db  000h, 000h, 000h, 00eh, 01bh, 018h, 018h, 018h, 07eh, 018h, 018h, 018h, 018h, 0d8h, 070h, 000h
   393 00015E91 18181818D87000      <1>
   394 00015E98 0018306000780C7CCC- <1>     db  000h, 018h, 030h, 060h, 000h, 078h, 00ch, 07ch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h, 00ch
   394 00015EA1 CC76000000000C      <1>
   395 00015EA8 18300038181818183C- <1>     db  018h, 030h, 000h, 038h, 018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h, 018h, 030h, 060h
   395 00015EB1 00000000183060      <1>
   396 00015EB8 007CC6C6C6C67C0000- <1>     db  000h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 018h, 030h, 060h, 000h, 0cch
   396 00015EC1 000018306000CC      <1>
   397 00015EC8 CCCCCCCC7600000000- <1>     db  0cch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h, 000h, 076h, 0dch, 000h, 0dch, 066h, 066h
   397 00015ED1 0076DC00DC6666      <1>
   398 00015ED8 66666600000076DC00- <1>     db  066h, 066h, 066h, 000h, 000h, 000h, 076h, 0dch, 000h, 0c6h, 0e6h, 0f6h, 0feh, 0deh, 0ceh, 0c6h
   398 00015EE1 C6E6F6FEDECEC6      <1>
   399 00015EE8 C6000000003C6C6C3E- <1>     db  0c6h, 000h, 000h, 000h, 000h, 03ch, 06ch, 06ch, 03eh, 000h, 07eh, 000h, 000h, 000h, 000h, 000h
   399 00015EF1 007E0000000000      <1>
   400 00015EF8 000000386C6C38007C- <1>     db  000h, 000h, 000h, 038h, 06ch, 06ch, 038h, 000h, 07ch, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   400 00015F01 00000000000000      <1>
   401 00015F08 0000303000303060C6- <1>     db  000h, 000h, 030h, 030h, 000h, 030h, 030h, 060h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h, 000h
   401 00015F11 C67C0000000000      <1>
   402 00015F18 00000000FEC0C0C000- <1>     db  000h, 000h, 000h, 000h, 0feh, 0c0h, 0c0h, 0c0h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   402 00015F21 00000000000000      <1>
   403 00015F28 0000FE060606000000- <1>     db  000h, 000h, 0feh, 006h, 006h, 006h, 000h, 000h, 000h, 000h, 000h, 0c0h, 0c0h, 0c6h, 0cch, 0d8h
   403 00015F31 0000C0C0C6CCD8      <1>
   404 00015F38 3060DC860C183E0000- <1>     db  030h, 060h, 0dch, 086h, 00ch, 018h, 03eh, 000h, 000h, 0c0h, 0c0h, 0c6h, 0cch, 0d8h, 030h, 066h
   404 00015F41 C0C0C6CCD83066      <1>
   405 00015F48 CE9E3E060600000018- <1>     db  0ceh, 09eh, 03eh, 006h, 006h, 000h, 000h, 000h, 018h, 018h, 000h, 018h, 018h, 03ch, 03ch, 03ch
   405 00015F51 180018183C3C3C      <1>
   406 00015F58 180000000000000036- <1>     db  018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 036h, 06ch, 0d8h, 06ch, 036h, 000h, 000h, 000h
   406 00015F61 6CD86C36000000      <1>
   407 00015F68 000000000000D86C36- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 0d8h, 06ch, 036h, 06ch, 0d8h, 000h, 000h, 000h, 000h, 000h
   407 00015F71 6CD80000000000      <1>
   408 00015F78 114411441144114411- <1>     db  011h, 044h, 011h, 044h, 011h, 044h, 011h, 044h, 011h, 044h, 011h, 044h, 011h, 044h, 055h, 0aah
   408 00015F81 441144114455AA      <1>
   409 00015F88 55AA55AA55AA55AA55- <1>     db  055h, 0aah, 055h, 0aah, 055h, 0aah, 055h, 0aah, 055h, 0aah, 055h, 0aah, 0ddh, 077h, 0ddh, 077h
   409 00015F91 AA55AADD77DD77      <1>
   410 00015F98 DD77DD77DD77DD77DD- <1>     db  0ddh, 077h, 0ddh, 077h, 0ddh, 077h, 0ddh, 077h, 0ddh, 077h, 018h, 018h, 018h, 018h, 018h, 018h
   410 00015FA1 77181818181818      <1>
   411 00015FA8 181818181818181818- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 0f8h
   411 00015FB1 181818181818F8      <1>
   412 00015FB8 181818181818181818- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 0f8h, 018h, 0f8h, 018h, 018h
   412 00015FC1 1818F818F81818      <1>
   413 00015FC8 181818183636363636- <1>     db  018h, 018h, 018h, 018h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 0f6h, 036h, 036h, 036h, 036h
   413 00015FD1 3636F636363636      <1>
   414 00015FD8 363600000000000000- <1>     db  036h, 036h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0feh, 036h, 036h, 036h, 036h, 036h, 036h
   414 00015FE1 FE363636363636      <1>
   415 00015FE8 0000000000F818F818- <1>     db  000h, 000h, 000h, 000h, 000h, 0f8h, 018h, 0f8h, 018h, 018h, 018h, 018h, 018h, 018h, 036h, 036h
   415 00015FF1 18181818183636      <1>
   416 00015FF8 363636F606F6363636- <1>     db  036h, 036h, 036h, 0f6h, 006h, 0f6h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   416 00016001 36363636363636      <1>
   417 00016008 363636363636363636- <1>     db  036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 000h, 000h, 000h, 000h, 000h, 0feh
   417 00016011 360000000000FE      <1>
   418 00016018 06F636363636363636- <1>     db  006h, 0f6h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 0f6h, 006h, 0feh
   418 00016021 36363636F606FE      <1>
   419 00016028 000000000000363636- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 0feh, 000h, 000h
   419 00016031 36363636FE0000      <1>
   420 00016038 000000001818181818- <1>     db  000h, 000h, 000h, 000h, 018h, 018h, 018h, 018h, 018h, 0f8h, 018h, 0f8h, 000h, 000h, 000h, 000h
   420 00016041 F818F800000000      <1>
   421 00016048 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0f8h, 018h, 018h, 018h, 018h, 018h, 018h
   421 00016051 F8181818181818      <1>
   422 00016058 181818181818181F00- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 018h, 01fh, 000h, 000h, 000h, 000h, 000h, 000h, 018h, 018h
   422 00016061 00000000001818      <1>
   423 00016068 1818181818FF000000- <1>     db  018h, 018h, 018h, 018h, 018h, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   423 00016071 00000000000000      <1>
   424 00016078 000000FF1818181818- <1>     db  000h, 000h, 000h, 0ffh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   424 00016081 18181818181818      <1>
   425 00016088 181F18181818181800- <1>     db  018h, 01fh, 018h, 018h, 018h, 018h, 018h, 018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0ffh
   425 00016091 000000000000FF      <1>
   426 00016098 000000000000181818- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 0ffh, 018h, 018h
   426 000160A1 18181818FF1818      <1>
   427 000160A8 181818181818181818- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 01fh, 018h, 01fh, 018h, 018h, 018h, 018h
   427 000160B1 1F181F18181818      <1>
   428 000160B8 181836363636363636- <1>     db  018h, 018h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 037h, 036h, 036h, 036h, 036h, 036h, 036h
   428 000160C1 37363636363636      <1>
   429 000160C8 363636363637303F00- <1>     db  036h, 036h, 036h, 036h, 036h, 037h, 030h, 03fh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   429 000160D1 00000000000000      <1>
   430 000160D8 0000003F3037363636- <1>     db  000h, 000h, 000h, 03fh, 030h, 037h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   430 000160E1 36363636363636      <1>
   431 000160E8 36F700FF0000000000- <1>     db  036h, 0f7h, 000h, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0ffh
   431 000160F1 000000000000FF      <1>
   432 000160F8 00F736363636363636- <1>     db  000h, 0f7h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 037h, 030h, 037h
   432 00016101 36363636373037      <1>
   433 00016108 363636363636000000- <1>     db  036h, 036h, 036h, 036h, 036h, 036h, 000h, 000h, 000h, 000h, 000h, 0ffh, 000h, 0ffh, 000h, 000h
   433 00016111 0000FF00FF0000      <1>
   434 00016118 000000003636363636- <1>     db  000h, 000h, 000h, 000h, 036h, 036h, 036h, 036h, 036h, 0f7h, 000h, 0f7h, 036h, 036h, 036h, 036h
   434 00016121 F700F736363636      <1>
   435 00016128 36361818181818FF00- <1>     db  036h, 036h, 018h, 018h, 018h, 018h, 018h, 0ffh, 000h, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h
   435 00016131 FF000000000000      <1>
   436 00016138 36363636363636FF00- <1>     db  036h, 036h, 036h, 036h, 036h, 036h, 036h, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   436 00016141 00000000000000      <1>
   437 00016148 000000FF00FF181818- <1>     db  000h, 000h, 000h, 0ffh, 000h, 0ffh, 018h, 018h, 018h, 018h, 018h, 018h, 000h, 000h, 000h, 000h
   437 00016151 18181800000000      <1>
   438 00016158 000000FF3636363636- <1>     db  000h, 000h, 000h, 0ffh, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   438 00016161 36363636363636      <1>
   439 00016168 363F00000000000018- <1>     db  036h, 03fh, 000h, 000h, 000h, 000h, 000h, 000h, 018h, 018h, 018h, 018h, 018h, 01fh, 018h, 01fh
   439 00016171 181818181F181F      <1>
   440 00016178 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 01fh, 018h, 01fh, 018h, 018h
   440 00016181 00001F181F1818      <1>
   441 00016188 181818180000000000- <1>     db  018h, 018h, 018h, 018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 03fh, 036h, 036h, 036h, 036h
   441 00016191 00003F36363636      <1>
   442 00016198 363636363636363636- <1>     db  036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 0ffh, 036h, 036h, 036h, 036h, 036h, 036h
   442 000161A1 FF363636363636      <1>
   443 000161A8 1818181818FF18FF18- <1>     db  018h, 018h, 018h, 018h, 018h, 0ffh, 018h, 0ffh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   443 000161B1 18181818181818      <1>
   444 000161B8 1818181818F8000000- <1>     db  018h, 018h, 018h, 018h, 018h, 0f8h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   444 000161C1 00000000000000      <1>
   445 000161C8 0000001F1818181818- <1>     db  000h, 000h, 000h, 01fh, 018h, 018h, 018h, 018h, 018h, 018h, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh
   445 000161D1 18FFFFFFFFFFFF      <1>
   446 000161D8 FFFFFFFFFFFFFFFF00- <1>     db  0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0ffh
   446 000161E1 000000000000FF      <1>
   447 000161E8 FFFFFFFFFFFFF0F0F0- <1>     db  0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h
   447 000161F1 F0F0F0F0F0F0F0      <1>
   448 000161F8 F0F0F0F00F0F0F0F0F- <1>     db  0f0h, 0f0h, 0f0h, 0f0h, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh
   448 00016201 0F0F0F0F0F0F0F      <1>
   449 00016208 0F0FFFFFFFFFFFFFFF- <1>     db  00fh, 00fh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   449 00016211 00000000000000      <1>
   450 00016218 000000000076DCD8D8- <1>     db  000h, 000h, 000h, 000h, 000h, 076h, 0dch, 0d8h, 0d8h, 0dch, 076h, 000h, 000h, 000h, 000h, 000h
   450 00016221 DC760000000000      <1>
   451 00016228 00007CC6FCC6C6FCC0- <1>     db  000h, 000h, 07ch, 0c6h, 0fch, 0c6h, 0c6h, 0fch, 0c0h, 0c0h, 040h, 000h, 000h, 000h, 0feh, 0c6h
   451 00016231 C040000000FEC6      <1>
   452 00016238 C6C0C0C0C0C0C00000- <1>     db  0c6h, 0c0h, 0c0h, 0c0h, 0c0h, 0c0h, 0c0h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0feh, 06ch
   452 00016241 0000000000FE6C      <1>
   453 00016248 6C6C6C6C6C00000000- <1>     db  06ch, 06ch, 06ch, 06ch, 06ch, 000h, 000h, 000h, 000h, 000h, 0feh, 0c6h, 060h, 030h, 018h, 030h
   453 00016251 00FEC660301830      <1>
   454 00016258 60C6FE000000000000- <1>     db  060h, 0c6h, 0feh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 07eh, 0d8h, 0d8h, 0d8h, 0d8h
   454 00016261 00007ED8D8D8D8      <1>
   455 00016268 700000000000000066- <1>     db  070h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 066h, 066h, 066h, 066h, 07ch, 060h, 060h, 0c0h
   455 00016271 6666667C6060C0      <1>
   456 00016278 00000000000076DC18- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 076h, 0dch, 018h, 018h, 018h, 018h, 018h, 000h, 000h, 000h
   456 00016281 18181818000000      <1>
   457 00016288 00007E183C6666663C- <1>     db  000h, 000h, 07eh, 018h, 03ch, 066h, 066h, 066h, 03ch, 018h, 07eh, 000h, 000h, 000h, 000h, 000h
   457 00016291 187E0000000000      <1>
   458 00016298 386CC6C6FEC6C66C38- <1>     db  038h, 06ch, 0c6h, 0c6h, 0feh, 0c6h, 0c6h, 06ch, 038h, 000h, 000h, 000h, 000h, 000h, 038h, 06ch
   458 000162A1 0000000000386C      <1>
   459 000162A8 C6C6C66C6C6CEE0000- <1>     db  0c6h, 0c6h, 0c6h, 06ch, 06ch, 06ch, 0eeh, 000h, 000h, 000h, 000h, 000h, 01eh, 030h, 018h, 00ch
   459 000162B1 0000001E30180C      <1>
   460 000162B8 3E6666663C00000000- <1>     db  03eh, 066h, 066h, 066h, 03ch, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 07eh, 0dbh, 0dbh
   460 000162C1 000000007EDBDB      <1>
   461 000162C8 7E0000000000000003- <1>     db  07eh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 003h, 006h, 07eh, 0dbh, 0dbh, 0f3h, 07eh, 060h
   461 000162D1 067EDBDBF37E60      <1>
   462 000162D8 C000000000001C3060- <1>     db  0c0h, 000h, 000h, 000h, 000h, 000h, 01ch, 030h, 060h, 060h, 07ch, 060h, 060h, 030h, 01ch, 000h
   462 000162E1 607C6060301C00      <1>
   463 000162E8 00000000007CC6C6C6- <1>     db  000h, 000h, 000h, 000h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 000h, 000h, 000h
   463 000162F1 C6C6C6C6000000      <1>
   464 000162F8 000000FE0000FE0000- <1>     db  000h, 000h, 000h, 0feh, 000h, 000h, 0feh, 000h, 000h, 0feh, 000h, 000h, 000h, 000h, 000h, 000h
   464 00016301 FE000000000000      <1>
   465 00016308 0018187E18180000FF- <1>     db  000h, 018h, 018h, 07eh, 018h, 018h, 000h, 000h, 0ffh, 000h, 000h, 000h, 000h, 000h, 030h, 018h
   465 00016311 00000000003018      <1>
   466 00016318 0C060C1830007E0000- <1>     db  00ch, 006h, 00ch, 018h, 030h, 000h, 07eh, 000h, 000h, 000h, 000h, 000h, 00ch, 018h, 030h, 060h
   466 00016321 0000000C183060      <1>
   467 00016328 30180C007E00000000- <1>     db  030h, 018h, 00ch, 000h, 07eh, 000h, 000h, 000h, 000h, 000h, 00eh, 01bh, 01bh, 018h, 018h, 018h
   467 00016331 000E1B1B181818      <1>
   468 00016338 181818181818181818- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 0d8h, 0d8h
   468 00016341 1818181818D8D8      <1>
   469 00016348 700000000000001818- <1>     db  070h, 000h, 000h, 000h, 000h, 000h, 000h, 018h, 018h, 000h, 07eh, 000h, 018h, 018h, 000h, 000h
   469 00016351 007E0018180000      <1>
   470 00016358 00000000000076DC00- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 076h, 0dch, 000h, 076h, 0dch, 000h, 000h, 000h, 000h, 000h
   470 00016361 76DC0000000000      <1>
   471 00016368 00386C6C3800000000- <1>     db  000h, 038h, 06ch, 06ch, 038h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   471 00016371 00000000000000      <1>
   472 00016378 000000001818000000- <1>     db  000h, 000h, 000h, 000h, 018h, 018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   472 00016381 00000000000000      <1>
   473 00016388 000000180000000000- <1>     db  000h, 000h, 000h, 018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 00fh, 00ch, 00ch, 00ch, 00ch
   473 00016391 00000F0C0C0C0C      <1>
   474 00016398 0CEC6C3C1C00000000- <1>     db  00ch, 0ech, 06ch, 03ch, 01ch, 000h, 000h, 000h, 000h, 0d8h, 06ch, 06ch, 06ch, 06ch, 06ch, 000h
   474 000163A1 D86C6C6C6C6C00      <1>
   475 000163A8 0000000000000070D8- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 070h, 0d8h, 030h, 060h, 0c8h, 0f8h, 000h, 000h, 000h
   475 000163B1 3060C8F8000000      <1>
   476 000163B8 00000000000000007C- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 07ch, 07ch, 07ch, 07ch, 07ch, 07ch, 000h, 000h
   476 000163C1 7C7C7C7C7C0000      <1>
   477 000163C8 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   477 000163D1 00000000000000      <1>
   478                              <1> vgafont16:
   479 000163D8 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   479 000163E1 00000000000000      <1>
   480 000163E8 00007E81A58181BD99- <1>     db  000h, 000h, 07eh, 081h, 0a5h, 081h, 081h, 0bdh, 099h, 081h, 081h, 07eh, 000h, 000h, 000h, 000h
   480 000163F1 81817E00000000      <1>
   481 000163F8 00007EFFDBFFFFC3E7- <1>     db  000h, 000h, 07eh, 0ffh, 0dbh, 0ffh, 0ffh, 0c3h, 0e7h, 0ffh, 0ffh, 07eh, 000h, 000h, 000h, 000h
   481 00016401 FFFF7E00000000      <1>
   482 00016408 000000006CFEFEFEFE- <1>     db  000h, 000h, 000h, 000h, 06ch, 0feh, 0feh, 0feh, 0feh, 07ch, 038h, 010h, 000h, 000h, 000h, 000h
   482 00016411 7C381000000000      <1>
   483 00016418 0000000010387CFE7C- <1>     db  000h, 000h, 000h, 000h, 010h, 038h, 07ch, 0feh, 07ch, 038h, 010h, 000h, 000h, 000h, 000h, 000h
   483 00016421 38100000000000      <1>
   484 00016428 000000183C3CE7E7E7- <1>     db  000h, 000h, 000h, 018h, 03ch, 03ch, 0e7h, 0e7h, 0e7h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h
   484 00016431 18183C00000000      <1>
   485 00016438 000000183C7EFFFF7E- <1>     db  000h, 000h, 000h, 018h, 03ch, 07eh, 0ffh, 0ffh, 07eh, 018h, 018h, 03ch, 000h, 000h, 000h, 000h
   485 00016441 18183C00000000      <1>
   486 00016448 000000000000183C3C- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 018h, 03ch, 03ch, 018h, 000h, 000h, 000h, 000h, 000h, 000h
   486 00016451 18000000000000      <1>
   487 00016458 FFFFFFFFFFFFE7C3C3- <1>     db  0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0e7h, 0c3h, 0c3h, 0e7h, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh
   487 00016461 E7FFFFFFFFFFFF      <1>
   488 00016468 00000000003C664242- <1>     db  000h, 000h, 000h, 000h, 000h, 03ch, 066h, 042h, 042h, 066h, 03ch, 000h, 000h, 000h, 000h, 000h
   488 00016471 663C0000000000      <1>
   489 00016478 FFFFFFFFFFC399BDBD- <1>     db  0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0c3h, 099h, 0bdh, 0bdh, 099h, 0c3h, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh
   489 00016481 99C3FFFFFFFFFF      <1>
   490 00016488 00001E0E1A3278CCCC- <1>     db  000h, 000h, 01eh, 00eh, 01ah, 032h, 078h, 0cch, 0cch, 0cch, 0cch, 078h, 000h, 000h, 000h, 000h
   490 00016491 CCCC7800000000      <1>
   491 00016498 00003C666666663C18- <1>     db  000h, 000h, 03ch, 066h, 066h, 066h, 066h, 03ch, 018h, 07eh, 018h, 018h, 000h, 000h, 000h, 000h
   491 000164A1 7E181800000000      <1>
   492 000164A8 00003F333F30303030- <1>     db  000h, 000h, 03fh, 033h, 03fh, 030h, 030h, 030h, 030h, 070h, 0f0h, 0e0h, 000h, 000h, 000h, 000h
   492 000164B1 70F0E000000000      <1>
   493 000164B8 00007F637F63636363- <1>     db  000h, 000h, 07fh, 063h, 07fh, 063h, 063h, 063h, 063h, 067h, 0e7h, 0e6h, 0c0h, 000h, 000h, 000h
   493 000164C1 67E7E6C0000000      <1>
   494 000164C8 0000001818DB3CE73C- <1>     db  000h, 000h, 000h, 018h, 018h, 0dbh, 03ch, 0e7h, 03ch, 0dbh, 018h, 018h, 000h, 000h, 000h, 000h
   494 000164D1 DB181800000000      <1>
   495 000164D8 0080C0E0F0F8FEF8F0- <1>     db  000h, 080h, 0c0h, 0e0h, 0f0h, 0f8h, 0feh, 0f8h, 0f0h, 0e0h, 0c0h, 080h, 000h, 000h, 000h, 000h
   495 000164E1 E0C08000000000      <1>
   496 000164E8 0002060E1E3EFE3E1E- <1>     db  000h, 002h, 006h, 00eh, 01eh, 03eh, 0feh, 03eh, 01eh, 00eh, 006h, 002h, 000h, 000h, 000h, 000h
   496 000164F1 0E060200000000      <1>
   497 000164F8 0000183C7E1818187E- <1>     db  000h, 000h, 018h, 03ch, 07eh, 018h, 018h, 018h, 07eh, 03ch, 018h, 000h, 000h, 000h, 000h, 000h
   497 00016501 3C180000000000      <1>
   498 00016508 000066666666666666- <1>     db  000h, 000h, 066h, 066h, 066h, 066h, 066h, 066h, 066h, 000h, 066h, 066h, 000h, 000h, 000h, 000h
   498 00016511 00666600000000      <1>
   499 00016518 00007FDBDBDB7B1B1B- <1>     db  000h, 000h, 07fh, 0dbh, 0dbh, 0dbh, 07bh, 01bh, 01bh, 01bh, 01bh, 01bh, 000h, 000h, 000h, 000h
   499 00016521 1B1B1B00000000      <1>
   500 00016528 007CC660386CC6C66C- <1>     db  000h, 07ch, 0c6h, 060h, 038h, 06ch, 0c6h, 0c6h, 06ch, 038h, 00ch, 0c6h, 07ch, 000h, 000h, 000h
   500 00016531 380CC67C000000      <1>
   501 00016538 0000000000000000FE- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0feh, 0feh, 0feh, 0feh, 000h, 000h, 000h, 000h
   501 00016541 FEFEFE00000000      <1>
   502 00016548 0000183C7E1818187E- <1>     db  000h, 000h, 018h, 03ch, 07eh, 018h, 018h, 018h, 07eh, 03ch, 018h, 07eh, 000h, 000h, 000h, 000h
   502 00016551 3C187E00000000      <1>
   503 00016558 0000183C7E18181818- <1>     db  000h, 000h, 018h, 03ch, 07eh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 000h, 000h, 000h, 000h
   503 00016561 18181800000000      <1>
   504 00016568 000018181818181818- <1>     db  000h, 000h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 07eh, 03ch, 018h, 000h, 000h, 000h, 000h
   504 00016571 7E3C1800000000      <1>
   505 00016578 0000000000180CFE0C- <1>     db  000h, 000h, 000h, 000h, 000h, 018h, 00ch, 0feh, 00ch, 018h, 000h, 000h, 000h, 000h, 000h, 000h
   505 00016581 18000000000000      <1>
   506 00016588 00000000003060FE60- <1>     db  000h, 000h, 000h, 000h, 000h, 030h, 060h, 0feh, 060h, 030h, 000h, 000h, 000h, 000h, 000h, 000h
   506 00016591 30000000000000      <1>
   507 00016598 000000000000C0C0C0- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 0c0h, 0c0h, 0c0h, 0feh, 000h, 000h, 000h, 000h, 000h, 000h
   507 000165A1 FE000000000000      <1>
   508 000165A8 00000000002466FF66- <1>     db  000h, 000h, 000h, 000h, 000h, 024h, 066h, 0ffh, 066h, 024h, 000h, 000h, 000h, 000h, 000h, 000h
   508 000165B1 24000000000000      <1>
   509 000165B8 000000001038387C7C- <1>     db  000h, 000h, 000h, 000h, 010h, 038h, 038h, 07ch, 07ch, 0feh, 0feh, 000h, 000h, 000h, 000h, 000h
   509 000165C1 FEFE0000000000      <1>
   510 000165C8 00000000FEFE7C7C38- <1>     db  000h, 000h, 000h, 000h, 0feh, 0feh, 07ch, 07ch, 038h, 038h, 010h, 000h, 000h, 000h, 000h, 000h
   510 000165D1 38100000000000      <1>
   511 000165D8 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   511 000165E1 00000000000000      <1>
   512 000165E8 0000183C3C3C181818- <1>     db  000h, 000h, 018h, 03ch, 03ch, 03ch, 018h, 018h, 018h, 000h, 018h, 018h, 000h, 000h, 000h, 000h
   512 000165F1 00181800000000      <1>
   513 000165F8 006666662400000000- <1>     db  000h, 066h, 066h, 066h, 024h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   513 00016601 00000000000000      <1>
   514 00016608 0000006C6CFE6C6C6C- <1>     db  000h, 000h, 000h, 06ch, 06ch, 0feh, 06ch, 06ch, 06ch, 0feh, 06ch, 06ch, 000h, 000h, 000h, 000h
   514 00016611 FE6C6C00000000      <1>
   515 00016618 18187CC6C2C07C0606- <1>     db  018h, 018h, 07ch, 0c6h, 0c2h, 0c0h, 07ch, 006h, 006h, 086h, 0c6h, 07ch, 018h, 018h, 000h, 000h
   515 00016621 86C67C18180000      <1>
   516 00016628 00000000C2C60C1830- <1>     db  000h, 000h, 000h, 000h, 0c2h, 0c6h, 00ch, 018h, 030h, 060h, 0c6h, 086h, 000h, 000h, 000h, 000h
   516 00016631 60C68600000000      <1>
   517 00016638 0000386C6C3876DCCC- <1>     db  000h, 000h, 038h, 06ch, 06ch, 038h, 076h, 0dch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h
   517 00016641 CCCC7600000000      <1>
   518 00016648 003030306000000000- <1>     db  000h, 030h, 030h, 030h, 060h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   518 00016651 00000000000000      <1>
   519 00016658 00000C183030303030- <1>     db  000h, 000h, 00ch, 018h, 030h, 030h, 030h, 030h, 030h, 030h, 018h, 00ch, 000h, 000h, 000h, 000h
   519 00016661 30180C00000000      <1>
   520 00016668 000030180C0C0C0C0C- <1>     db  000h, 000h, 030h, 018h, 00ch, 00ch, 00ch, 00ch, 00ch, 00ch, 018h, 030h, 000h, 000h, 000h, 000h
   520 00016671 0C183000000000      <1>
   521 00016678 0000000000663CFF3C- <1>     db  000h, 000h, 000h, 000h, 000h, 066h, 03ch, 0ffh, 03ch, 066h, 000h, 000h, 000h, 000h, 000h, 000h
   521 00016681 66000000000000      <1>
   522 00016688 000000000018187E18- <1>     db  000h, 000h, 000h, 000h, 000h, 018h, 018h, 07eh, 018h, 018h, 000h, 000h, 000h, 000h, 000h, 000h
   522 00016691 18000000000000      <1>
   523 00016698 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 018h, 018h, 018h, 030h, 000h, 000h, 000h
   523 000166A1 18181830000000      <1>
   524 000166A8 00000000000000FE00- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 0feh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   524 000166B1 00000000000000      <1>
   525 000166B8 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 018h, 018h, 000h, 000h, 000h, 000h
   525 000166C1 00181800000000      <1>
   526 000166C8 0000000002060C1830- <1>     db  000h, 000h, 000h, 000h, 002h, 006h, 00ch, 018h, 030h, 060h, 0c0h, 080h, 000h, 000h, 000h, 000h
   526 000166D1 60C08000000000      <1>
   527 000166D8 00003C66C3C3DBDBC3- <1>     db  000h, 000h, 03ch, 066h, 0c3h, 0c3h, 0dbh, 0dbh, 0c3h, 0c3h, 066h, 03ch, 000h, 000h, 000h, 000h
   527 000166E1 C3663C00000000      <1>
   528 000166E8 000018387818181818- <1>     db  000h, 000h, 018h, 038h, 078h, 018h, 018h, 018h, 018h, 018h, 018h, 07eh, 000h, 000h, 000h, 000h
   528 000166F1 18187E00000000      <1>
   529 000166F8 00007CC6060C183060- <1>     db  000h, 000h, 07ch, 0c6h, 006h, 00ch, 018h, 030h, 060h, 0c0h, 0c6h, 0feh, 000h, 000h, 000h, 000h
   529 00016701 C0C6FE00000000      <1>
   530 00016708 00007CC606063C0606- <1>     db  000h, 000h, 07ch, 0c6h, 006h, 006h, 03ch, 006h, 006h, 006h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   530 00016711 06C67C00000000      <1>
   531 00016718 00000C1C3C6CCCFE0C- <1>     db  000h, 000h, 00ch, 01ch, 03ch, 06ch, 0cch, 0feh, 00ch, 00ch, 00ch, 01eh, 000h, 000h, 000h, 000h
   531 00016721 0C0C1E00000000      <1>
   532 00016728 0000FEC0C0C0FC0606- <1>     db  000h, 000h, 0feh, 0c0h, 0c0h, 0c0h, 0fch, 006h, 006h, 006h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   532 00016731 06C67C00000000      <1>
   533 00016738 00003860C0C0FCC6C6- <1>     db  000h, 000h, 038h, 060h, 0c0h, 0c0h, 0fch, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   533 00016741 C6C67C00000000      <1>
   534 00016748 0000FEC606060C1830- <1>     db  000h, 000h, 0feh, 0c6h, 006h, 006h, 00ch, 018h, 030h, 030h, 030h, 030h, 000h, 000h, 000h, 000h
   534 00016751 30303000000000      <1>
   535 00016758 00007CC6C6C67CC6C6- <1>     db  000h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   535 00016761 C6C67C00000000      <1>
   536 00016768 00007CC6C6C67E0606- <1>     db  000h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 07eh, 006h, 006h, 006h, 00ch, 078h, 000h, 000h, 000h, 000h
   536 00016771 060C7800000000      <1>
   537 00016778 000000001818000000- <1>     db  000h, 000h, 000h, 000h, 018h, 018h, 000h, 000h, 000h, 018h, 018h, 000h, 000h, 000h, 000h, 000h
   537 00016781 18180000000000      <1>
   538 00016788 000000001818000000- <1>     db  000h, 000h, 000h, 000h, 018h, 018h, 000h, 000h, 000h, 018h, 018h, 030h, 000h, 000h, 000h, 000h
   538 00016791 18183000000000      <1>
   539 00016798 000000060C18306030- <1>     db  000h, 000h, 000h, 006h, 00ch, 018h, 030h, 060h, 030h, 018h, 00ch, 006h, 000h, 000h, 000h, 000h
   539 000167A1 180C0600000000      <1>
   540 000167A8 00000000007E00007E- <1>     db  000h, 000h, 000h, 000h, 000h, 07eh, 000h, 000h, 07eh, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   540 000167B1 00000000000000      <1>
   541 000167B8 0000006030180C060C- <1>     db  000h, 000h, 000h, 060h, 030h, 018h, 00ch, 006h, 00ch, 018h, 030h, 060h, 000h, 000h, 000h, 000h
   541 000167C1 18306000000000      <1>
   542 000167C8 00007CC6C60C181818- <1>     db  000h, 000h, 07ch, 0c6h, 0c6h, 00ch, 018h, 018h, 018h, 000h, 018h, 018h, 000h, 000h, 000h, 000h
   542 000167D1 00181800000000      <1>
   543 000167D8 0000007CC6C6DEDEDE- <1>     db  000h, 000h, 000h, 07ch, 0c6h, 0c6h, 0deh, 0deh, 0deh, 0dch, 0c0h, 07ch, 000h, 000h, 000h, 000h
   543 000167E1 DCC07C00000000      <1>
   544 000167E8 000010386CC6C6FEC6- <1>     db  000h, 000h, 010h, 038h, 06ch, 0c6h, 0c6h, 0feh, 0c6h, 0c6h, 0c6h, 0c6h, 000h, 000h, 000h, 000h
   544 000167F1 C6C6C600000000      <1>
   545 000167F8 0000FC6666667C6666- <1>     db  000h, 000h, 0fch, 066h, 066h, 066h, 07ch, 066h, 066h, 066h, 066h, 0fch, 000h, 000h, 000h, 000h
   545 00016801 6666FC00000000      <1>
   546 00016808 00003C66C2C0C0C0C0- <1>     db  000h, 000h, 03ch, 066h, 0c2h, 0c0h, 0c0h, 0c0h, 0c0h, 0c2h, 066h, 03ch, 000h, 000h, 000h, 000h
   546 00016811 C2663C00000000      <1>
   547 00016818 0000F86C6666666666- <1>     db  000h, 000h, 0f8h, 06ch, 066h, 066h, 066h, 066h, 066h, 066h, 06ch, 0f8h, 000h, 000h, 000h, 000h
   547 00016821 666CF800000000      <1>
   548 00016828 0000FE666268786860- <1>     db  000h, 000h, 0feh, 066h, 062h, 068h, 078h, 068h, 060h, 062h, 066h, 0feh, 000h, 000h, 000h, 000h
   548 00016831 6266FE00000000      <1>
   549 00016838 0000FE666268786860- <1>     db  000h, 000h, 0feh, 066h, 062h, 068h, 078h, 068h, 060h, 060h, 060h, 0f0h, 000h, 000h, 000h, 000h
   549 00016841 6060F000000000      <1>
   550 00016848 00003C66C2C0C0DEC6- <1>     db  000h, 000h, 03ch, 066h, 0c2h, 0c0h, 0c0h, 0deh, 0c6h, 0c6h, 066h, 03ah, 000h, 000h, 000h, 000h
   550 00016851 C6663A00000000      <1>
   551 00016858 0000C6C6C6C6FEC6C6- <1>     db  000h, 000h, 0c6h, 0c6h, 0c6h, 0c6h, 0feh, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 000h, 000h, 000h, 000h
   551 00016861 C6C6C600000000      <1>
   552 00016868 00003C181818181818- <1>     db  000h, 000h, 03ch, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h
   552 00016871 18183C00000000      <1>
   553 00016878 00001E0C0C0C0C0CCC- <1>     db  000h, 000h, 01eh, 00ch, 00ch, 00ch, 00ch, 00ch, 0cch, 0cch, 0cch, 078h, 000h, 000h, 000h, 000h
   553 00016881 CCCC7800000000      <1>
   554 00016888 0000E666666C78786C- <1>     db  000h, 000h, 0e6h, 066h, 066h, 06ch, 078h, 078h, 06ch, 066h, 066h, 0e6h, 000h, 000h, 000h, 000h
   554 00016891 6666E600000000      <1>
   555 00016898 0000F0606060606060- <1>     db  000h, 000h, 0f0h, 060h, 060h, 060h, 060h, 060h, 060h, 062h, 066h, 0feh, 000h, 000h, 000h, 000h
   555 000168A1 6266FE00000000      <1>
   556 000168A8 0000C3E7FFFFDBC3C3- <1>     db  000h, 000h, 0c3h, 0e7h, 0ffh, 0ffh, 0dbh, 0c3h, 0c3h, 0c3h, 0c3h, 0c3h, 000h, 000h, 000h, 000h
   556 000168B1 C3C3C300000000      <1>
   557 000168B8 0000C6E6F6FEDECEC6- <1>     db  000h, 000h, 0c6h, 0e6h, 0f6h, 0feh, 0deh, 0ceh, 0c6h, 0c6h, 0c6h, 0c6h, 000h, 000h, 000h, 000h
   557 000168C1 C6C6C600000000      <1>
   558 000168C8 00007CC6C6C6C6C6C6- <1>     db  000h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   558 000168D1 C6C67C00000000      <1>
   559 000168D8 0000FC6666667C6060- <1>     db  000h, 000h, 0fch, 066h, 066h, 066h, 07ch, 060h, 060h, 060h, 060h, 0f0h, 000h, 000h, 000h, 000h
   559 000168E1 6060F000000000      <1>
   560 000168E8 00007CC6C6C6C6C6C6- <1>     db  000h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0d6h, 0deh, 07ch, 00ch, 00eh, 000h, 000h
   560 000168F1 D6DE7C0C0E0000      <1>
   561 000168F8 0000FC6666667C6C66- <1>     db  000h, 000h, 0fch, 066h, 066h, 066h, 07ch, 06ch, 066h, 066h, 066h, 0e6h, 000h, 000h, 000h, 000h
   561 00016901 6666E600000000      <1>
   562 00016908 00007CC6C660380C06- <1>     db  000h, 000h, 07ch, 0c6h, 0c6h, 060h, 038h, 00ch, 006h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   562 00016911 C6C67C00000000      <1>
   563 00016918 0000FFDB9918181818- <1>     db  000h, 000h, 0ffh, 0dbh, 099h, 018h, 018h, 018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h
   563 00016921 18183C00000000      <1>
   564 00016928 0000C6C6C6C6C6C6C6- <1>     db  000h, 000h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   564 00016931 C6C67C00000000      <1>
   565 00016938 0000C3C3C3C3C3C3C3- <1>     db  000h, 000h, 0c3h, 0c3h, 0c3h, 0c3h, 0c3h, 0c3h, 0c3h, 066h, 03ch, 018h, 000h, 000h, 000h, 000h
   565 00016941 663C1800000000      <1>
   566 00016948 0000C3C3C3C3C3DBDB- <1>     db  000h, 000h, 0c3h, 0c3h, 0c3h, 0c3h, 0c3h, 0dbh, 0dbh, 0ffh, 066h, 066h, 000h, 000h, 000h, 000h
   566 00016951 FF666600000000      <1>
   567 00016958 0000C3C3663C18183C- <1>     db  000h, 000h, 0c3h, 0c3h, 066h, 03ch, 018h, 018h, 03ch, 066h, 0c3h, 0c3h, 000h, 000h, 000h, 000h
   567 00016961 66C3C300000000      <1>
   568 00016968 0000C3C3C3663C1818- <1>     db  000h, 000h, 0c3h, 0c3h, 0c3h, 066h, 03ch, 018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h
   568 00016971 18183C00000000      <1>
   569 00016978 0000FFC3860C183060- <1>     db  000h, 000h, 0ffh, 0c3h, 086h, 00ch, 018h, 030h, 060h, 0c1h, 0c3h, 0ffh, 000h, 000h, 000h, 000h
   569 00016981 C1C3FF00000000      <1>
   570 00016988 00003C303030303030- <1>     db  000h, 000h, 03ch, 030h, 030h, 030h, 030h, 030h, 030h, 030h, 030h, 03ch, 000h, 000h, 000h, 000h
   570 00016991 30303C00000000      <1>
   571 00016998 00000080C0E070381C- <1>     db  000h, 000h, 000h, 080h, 0c0h, 0e0h, 070h, 038h, 01ch, 00eh, 006h, 002h, 000h, 000h, 000h, 000h
   571 000169A1 0E060200000000      <1>
   572 000169A8 00003C0C0C0C0C0C0C- <1>     db  000h, 000h, 03ch, 00ch, 00ch, 00ch, 00ch, 00ch, 00ch, 00ch, 00ch, 03ch, 000h, 000h, 000h, 000h
   572 000169B1 0C0C3C00000000      <1>
   573 000169B8 10386CC60000000000- <1>     db  010h, 038h, 06ch, 0c6h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   573 000169C1 00000000000000      <1>
   574 000169C8 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 0ffh, 000h, 000h
   574 000169D1 00000000FF0000      <1>
   575 000169D8 303018000000000000- <1>     db  030h, 030h, 018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   575 000169E1 00000000000000      <1>
   576 000169E8 0000000000780C7CCC- <1>     db  000h, 000h, 000h, 000h, 000h, 078h, 00ch, 07ch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h
   576 000169F1 CCCC7600000000      <1>
   577 000169F8 0000E06060786C6666- <1>     db  000h, 000h, 0e0h, 060h, 060h, 078h, 06ch, 066h, 066h, 066h, 066h, 07ch, 000h, 000h, 000h, 000h
   577 00016A01 66667C00000000      <1>
   578 00016A08 00000000007CC6C0C0- <1>     db  000h, 000h, 000h, 000h, 000h, 07ch, 0c6h, 0c0h, 0c0h, 0c0h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   578 00016A11 C0C67C00000000      <1>
   579 00016A18 00001C0C0C3C6CCCCC- <1>     db  000h, 000h, 01ch, 00ch, 00ch, 03ch, 06ch, 0cch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h
   579 00016A21 CCCC7600000000      <1>
   580 00016A28 00000000007CC6FEC0- <1>     db  000h, 000h, 000h, 000h, 000h, 07ch, 0c6h, 0feh, 0c0h, 0c0h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   580 00016A31 C0C67C00000000      <1>
   581 00016A38 0000386C6460F06060- <1>     db  000h, 000h, 038h, 06ch, 064h, 060h, 0f0h, 060h, 060h, 060h, 060h, 0f0h, 000h, 000h, 000h, 000h
   581 00016A41 6060F000000000      <1>
   582 00016A48 000000000076CCCCCC- <1>     db  000h, 000h, 000h, 000h, 000h, 076h, 0cch, 0cch, 0cch, 0cch, 0cch, 07ch, 00ch, 0cch, 078h, 000h
   582 00016A51 CCCC7C0CCC7800      <1>
   583 00016A58 0000E060606C766666- <1>     db  000h, 000h, 0e0h, 060h, 060h, 06ch, 076h, 066h, 066h, 066h, 066h, 0e6h, 000h, 000h, 000h, 000h
   583 00016A61 6666E600000000      <1>
   584 00016A68 000018180038181818- <1>     db  000h, 000h, 018h, 018h, 000h, 038h, 018h, 018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h
   584 00016A71 18183C00000000      <1>
   585 00016A78 00000606000E060606- <1>     db  000h, 000h, 006h, 006h, 000h, 00eh, 006h, 006h, 006h, 006h, 006h, 006h, 066h, 066h, 03ch, 000h
   585 00016A81 06060666663C00      <1>
   586 00016A88 0000E06060666C7878- <1>     db  000h, 000h, 0e0h, 060h, 060h, 066h, 06ch, 078h, 078h, 06ch, 066h, 0e6h, 000h, 000h, 000h, 000h
   586 00016A91 6C66E600000000      <1>
   587 00016A98 000038181818181818- <1>     db  000h, 000h, 038h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h
   587 00016AA1 18183C00000000      <1>
   588 00016AA8 0000000000E6FFDBDB- <1>     db  000h, 000h, 000h, 000h, 000h, 0e6h, 0ffh, 0dbh, 0dbh, 0dbh, 0dbh, 0dbh, 000h, 000h, 000h, 000h
   588 00016AB1 DBDBDB00000000      <1>
   589 00016AB8 0000000000DC666666- <1>     db  000h, 000h, 000h, 000h, 000h, 0dch, 066h, 066h, 066h, 066h, 066h, 066h, 000h, 000h, 000h, 000h
   589 00016AC1 66666600000000      <1>
   590 00016AC8 00000000007CC6C6C6- <1>     db  000h, 000h, 000h, 000h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   590 00016AD1 C6C67C00000000      <1>
   591 00016AD8 0000000000DC666666- <1>     db  000h, 000h, 000h, 000h, 000h, 0dch, 066h, 066h, 066h, 066h, 066h, 07ch, 060h, 060h, 0f0h, 000h
   591 00016AE1 66667C6060F000      <1>
   592 00016AE8 000000000076CCCCCC- <1>     db  000h, 000h, 000h, 000h, 000h, 076h, 0cch, 0cch, 0cch, 0cch, 0cch, 07ch, 00ch, 00ch, 01eh, 000h
   592 00016AF1 CCCC7C0C0C1E00      <1>
   593 00016AF8 0000000000DC766660- <1>     db  000h, 000h, 000h, 000h, 000h, 0dch, 076h, 066h, 060h, 060h, 060h, 0f0h, 000h, 000h, 000h, 000h
   593 00016B01 6060F000000000      <1>
   594 00016B08 00000000007CC66038- <1>     db  000h, 000h, 000h, 000h, 000h, 07ch, 0c6h, 060h, 038h, 00ch, 0c6h, 07ch, 000h, 000h, 000h, 000h
   594 00016B11 0CC67C00000000      <1>
   595 00016B18 0000103030FC303030- <1>     db  000h, 000h, 010h, 030h, 030h, 0fch, 030h, 030h, 030h, 030h, 036h, 01ch, 000h, 000h, 000h, 000h
   595 00016B21 30361C00000000      <1>
   596 00016B28 0000000000CCCCCCCC- <1>     db  000h, 000h, 000h, 000h, 000h, 0cch, 0cch, 0cch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h
   596 00016B31 CCCC7600000000      <1>
   597 00016B38 0000000000C3C3C3C3- <1>     db  000h, 000h, 000h, 000h, 000h, 0c3h, 0c3h, 0c3h, 0c3h, 066h, 03ch, 018h, 000h, 000h, 000h, 000h
   597 00016B41 663C1800000000      <1>
   598 00016B48 0000000000C3C3C3DB- <1>     db  000h, 000h, 000h, 000h, 000h, 0c3h, 0c3h, 0c3h, 0dbh, 0dbh, 0ffh, 066h, 000h, 000h, 000h, 000h
   598 00016B51 DBFF6600000000      <1>
   599 00016B58 0000000000C3663C18- <1>     db  000h, 000h, 000h, 000h, 000h, 0c3h, 066h, 03ch, 018h, 03ch, 066h, 0c3h, 000h, 000h, 000h, 000h
   599 00016B61 3C66C300000000      <1>
   600 00016B68 0000000000C6C6C6C6- <1>     db  000h, 000h, 000h, 000h, 000h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 07eh, 006h, 00ch, 0f8h, 000h
   600 00016B71 C6C67E060CF800      <1>
   601 00016B78 0000000000FECC1830- <1>     db  000h, 000h, 000h, 000h, 000h, 0feh, 0cch, 018h, 030h, 060h, 0c6h, 0feh, 000h, 000h, 000h, 000h
   601 00016B81 60C6FE00000000      <1>
   602 00016B88 00000E181818701818- <1>     db  000h, 000h, 00eh, 018h, 018h, 018h, 070h, 018h, 018h, 018h, 018h, 00eh, 000h, 000h, 000h, 000h
   602 00016B91 18180E00000000      <1>
   603 00016B98 000018181818001818- <1>     db  000h, 000h, 018h, 018h, 018h, 018h, 000h, 018h, 018h, 018h, 018h, 018h, 000h, 000h, 000h, 000h
   603 00016BA1 18181800000000      <1>
   604 00016BA8 0000701818180E1818- <1>     db  000h, 000h, 070h, 018h, 018h, 018h, 00eh, 018h, 018h, 018h, 018h, 070h, 000h, 000h, 000h, 000h
   604 00016BB1 18187000000000      <1>
   605 00016BB8 000076DC0000000000- <1>     db  000h, 000h, 076h, 0dch, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   605 00016BC1 00000000000000      <1>
   606 00016BC8 0000000010386CC6C6- <1>     db  000h, 000h, 000h, 000h, 010h, 038h, 06ch, 0c6h, 0c6h, 0c6h, 0feh, 000h, 000h, 000h, 000h, 000h
   606 00016BD1 C6FE0000000000      <1>
   607 00016BD8 00003C66C2C0C0C0C2- <1>     db  000h, 000h, 03ch, 066h, 0c2h, 0c0h, 0c0h, 0c0h, 0c2h, 066h, 03ch, 00ch, 006h, 07ch, 000h, 000h
   607 00016BE1 663C0C067C0000      <1>
   608 00016BE8 0000CC0000CCCCCCCC- <1>     db  000h, 000h, 0cch, 000h, 000h, 0cch, 0cch, 0cch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h
   608 00016BF1 CCCC7600000000      <1>
   609 00016BF8 000C1830007CC6FEC0- <1>     db  000h, 00ch, 018h, 030h, 000h, 07ch, 0c6h, 0feh, 0c0h, 0c0h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   609 00016C01 C0C67C00000000      <1>
   610 00016C08 0010386C00780C7CCC- <1>     db  000h, 010h, 038h, 06ch, 000h, 078h, 00ch, 07ch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h
   610 00016C11 CCCC7600000000      <1>
   611 00016C18 0000CC0000780C7CCC- <1>     db  000h, 000h, 0cch, 000h, 000h, 078h, 00ch, 07ch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h
   611 00016C21 CCCC7600000000      <1>
   612 00016C28 0060301800780C7CCC- <1>     db  000h, 060h, 030h, 018h, 000h, 078h, 00ch, 07ch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h
   612 00016C31 CCCC7600000000      <1>
   613 00016C38 00386C3800780C7CCC- <1>     db  000h, 038h, 06ch, 038h, 000h, 078h, 00ch, 07ch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h
   613 00016C41 CCCC7600000000      <1>
   614 00016C48 000000003C66606066- <1>     db  000h, 000h, 000h, 000h, 03ch, 066h, 060h, 060h, 066h, 03ch, 00ch, 006h, 03ch, 000h, 000h, 000h
   614 00016C51 3C0C063C000000      <1>
   615 00016C58 0010386C007CC6FEC0- <1>     db  000h, 010h, 038h, 06ch, 000h, 07ch, 0c6h, 0feh, 0c0h, 0c0h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   615 00016C61 C0C67C00000000      <1>
   616 00016C68 0000C600007CC6FEC0- <1>     db  000h, 000h, 0c6h, 000h, 000h, 07ch, 0c6h, 0feh, 0c0h, 0c0h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   616 00016C71 C0C67C00000000      <1>
   617 00016C78 00603018007CC6FEC0- <1>     db  000h, 060h, 030h, 018h, 000h, 07ch, 0c6h, 0feh, 0c0h, 0c0h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   617 00016C81 C0C67C00000000      <1>
   618 00016C88 000066000038181818- <1>     db  000h, 000h, 066h, 000h, 000h, 038h, 018h, 018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h
   618 00016C91 18183C00000000      <1>
   619 00016C98 00183C660038181818- <1>     db  000h, 018h, 03ch, 066h, 000h, 038h, 018h, 018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h
   619 00016CA1 18183C00000000      <1>
   620 00016CA8 006030180038181818- <1>     db  000h, 060h, 030h, 018h, 000h, 038h, 018h, 018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h
   620 00016CB1 18183C00000000      <1>
   621 00016CB8 00C60010386CC6C6FE- <1>     db  000h, 0c6h, 000h, 010h, 038h, 06ch, 0c6h, 0c6h, 0feh, 0c6h, 0c6h, 0c6h, 000h, 000h, 000h, 000h
   621 00016CC1 C6C6C600000000      <1>
   622 00016CC8 386C3800386CC6C6FE- <1>     db  038h, 06ch, 038h, 000h, 038h, 06ch, 0c6h, 0c6h, 0feh, 0c6h, 0c6h, 0c6h, 000h, 000h, 000h, 000h
   622 00016CD1 C6C6C600000000      <1>
   623 00016CD8 18306000FE66607C60- <1>     db  018h, 030h, 060h, 000h, 0feh, 066h, 060h, 07ch, 060h, 060h, 066h, 0feh, 000h, 000h, 000h, 000h
   623 00016CE1 6066FE00000000      <1>
   624 00016CE8 00000000006E3B1B7E- <1>     db  000h, 000h, 000h, 000h, 000h, 06eh, 03bh, 01bh, 07eh, 0d8h, 0dch, 077h, 000h, 000h, 000h, 000h
   624 00016CF1 D8DC7700000000      <1>
   625 00016CF8 00003E6CCCCCFECCCC- <1>     db  000h, 000h, 03eh, 06ch, 0cch, 0cch, 0feh, 0cch, 0cch, 0cch, 0cch, 0ceh, 000h, 000h, 000h, 000h
   625 00016D01 CCCCCE00000000      <1>
   626 00016D08 0010386C007CC6C6C6- <1>     db  000h, 010h, 038h, 06ch, 000h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   626 00016D11 C6C67C00000000      <1>
   627 00016D18 0000C600007CC6C6C6- <1>     db  000h, 000h, 0c6h, 000h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   627 00016D21 C6C67C00000000      <1>
   628 00016D28 00603018007CC6C6C6- <1>     db  000h, 060h, 030h, 018h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   628 00016D31 C6C67C00000000      <1>
   629 00016D38 003078CC00CCCCCCCC- <1>     db  000h, 030h, 078h, 0cch, 000h, 0cch, 0cch, 0cch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h
   629 00016D41 CCCC7600000000      <1>
   630 00016D48 0060301800CCCCCCCC- <1>     db  000h, 060h, 030h, 018h, 000h, 0cch, 0cch, 0cch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h
   630 00016D51 CCCC7600000000      <1>
   631 00016D58 0000C60000C6C6C6C6- <1>     db  000h, 000h, 0c6h, 000h, 000h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 07eh, 006h, 00ch, 078h, 000h
   631 00016D61 C6C67E060C7800      <1>
   632 00016D68 00C6007CC6C6C6C6C6- <1>     db  000h, 0c6h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   632 00016D71 C6C67C00000000      <1>
   633 00016D78 00C600C6C6C6C6C6C6- <1>     db  000h, 0c6h, 000h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   633 00016D81 C6C67C00000000      <1>
   634 00016D88 0018187EC3C0C0C0C3- <1>     db  000h, 018h, 018h, 07eh, 0c3h, 0c0h, 0c0h, 0c0h, 0c3h, 07eh, 018h, 018h, 000h, 000h, 000h, 000h
   634 00016D91 7E181800000000      <1>
   635 00016D98 00386C6460F0606060- <1>     db  000h, 038h, 06ch, 064h, 060h, 0f0h, 060h, 060h, 060h, 060h, 0e6h, 0fch, 000h, 000h, 000h, 000h
   635 00016DA1 60E6FC00000000      <1>
   636 00016DA8 0000C3663C18FF18FF- <1>     db  000h, 000h, 0c3h, 066h, 03ch, 018h, 0ffh, 018h, 0ffh, 018h, 018h, 018h, 000h, 000h, 000h, 000h
   636 00016DB1 18181800000000      <1>
   637 00016DB8 00FC66667C62666F66- <1>     db  000h, 0fch, 066h, 066h, 07ch, 062h, 066h, 06fh, 066h, 066h, 066h, 0f3h, 000h, 000h, 000h, 000h
   637 00016DC1 6666F300000000      <1>
   638 00016DC8 000E1B1818187E1818- <1>     db  000h, 00eh, 01bh, 018h, 018h, 018h, 07eh, 018h, 018h, 018h, 018h, 018h, 0d8h, 070h, 000h, 000h
   638 00016DD1 181818D8700000      <1>
   639 00016DD8 0018306000780C7CCC- <1>     db  000h, 018h, 030h, 060h, 000h, 078h, 00ch, 07ch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h
   639 00016DE1 CCCC7600000000      <1>
   640 00016DE8 000C18300038181818- <1>     db  000h, 00ch, 018h, 030h, 000h, 038h, 018h, 018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h
   640 00016DF1 18183C00000000      <1>
   641 00016DF8 00183060007CC6C6C6- <1>     db  000h, 018h, 030h, 060h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   641 00016E01 C6C67C00000000      <1>
   642 00016E08 0018306000CCCCCCCC- <1>     db  000h, 018h, 030h, 060h, 000h, 0cch, 0cch, 0cch, 0cch, 0cch, 0cch, 076h, 000h, 000h, 000h, 000h
   642 00016E11 CCCC7600000000      <1>
   643 00016E18 000076DC00DC666666- <1>     db  000h, 000h, 076h, 0dch, 000h, 0dch, 066h, 066h, 066h, 066h, 066h, 066h, 000h, 000h, 000h, 000h
   643 00016E21 66666600000000      <1>
   644 00016E28 76DC00C6E6F6FEDECE- <1>     db  076h, 0dch, 000h, 0c6h, 0e6h, 0f6h, 0feh, 0deh, 0ceh, 0c6h, 0c6h, 0c6h, 000h, 000h, 000h, 000h
   644 00016E31 C6C6C600000000      <1>
   645 00016E38 003C6C6C3E007E0000- <1>     db  000h, 03ch, 06ch, 06ch, 03eh, 000h, 07eh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   645 00016E41 00000000000000      <1>
   646 00016E48 00386C6C38007C0000- <1>     db  000h, 038h, 06ch, 06ch, 038h, 000h, 07ch, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   646 00016E51 00000000000000      <1>
   647 00016E58 0000303000303060C0- <1>     db  000h, 000h, 030h, 030h, 000h, 030h, 030h, 060h, 0c0h, 0c6h, 0c6h, 07ch, 000h, 000h, 000h, 000h
   647 00016E61 C6C67C00000000      <1>
   648 00016E68 000000000000FEC0C0- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 0feh, 0c0h, 0c0h, 0c0h, 0c0h, 000h, 000h, 000h, 000h, 000h
   648 00016E71 C0C00000000000      <1>
   649 00016E78 000000000000FE0606- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 0feh, 006h, 006h, 006h, 006h, 000h, 000h, 000h, 000h, 000h
   649 00016E81 06060000000000      <1>
   650 00016E88 00C0C0C2C6CC183060- <1>     db  000h, 0c0h, 0c0h, 0c2h, 0c6h, 0cch, 018h, 030h, 060h, 0ceh, 09bh, 006h, 00ch, 01fh, 000h, 000h
   650 00016E91 CE9B060C1F0000      <1>
   651 00016E98 00C0C0C2C6CC183066- <1>     db  000h, 0c0h, 0c0h, 0c2h, 0c6h, 0cch, 018h, 030h, 066h, 0ceh, 096h, 03eh, 006h, 006h, 000h, 000h
   651 00016EA1 CE963E06060000      <1>
   652 00016EA8 00001818001818183C- <1>     db  000h, 000h, 018h, 018h, 000h, 018h, 018h, 018h, 03ch, 03ch, 03ch, 018h, 000h, 000h, 000h, 000h
   652 00016EB1 3C3C1800000000      <1>
   653 00016EB8 0000000000366CD86C- <1>     db  000h, 000h, 000h, 000h, 000h, 036h, 06ch, 0d8h, 06ch, 036h, 000h, 000h, 000h, 000h, 000h, 000h
   653 00016EC1 36000000000000      <1>
   654 00016EC8 0000000000D86C366C- <1>     db  000h, 000h, 000h, 000h, 000h, 0d8h, 06ch, 036h, 06ch, 0d8h, 000h, 000h, 000h, 000h, 000h, 000h
   654 00016ED1 D8000000000000      <1>
   655 00016ED8 114411441144114411- <1>     db  011h, 044h, 011h, 044h, 011h, 044h, 011h, 044h, 011h, 044h, 011h, 044h, 011h, 044h, 011h, 044h
   655 00016EE1 44114411441144      <1>
   656 00016EE8 55AA55AA55AA55AA55- <1>     db  055h, 0aah, 055h, 0aah, 055h, 0aah, 055h, 0aah, 055h, 0aah, 055h, 0aah, 055h, 0aah, 055h, 0aah
   656 00016EF1 AA55AA55AA55AA      <1>
   657 00016EF8 DD77DD77DD77DD77DD- <1>     db  0ddh, 077h, 0ddh, 077h, 0ddh, 077h, 0ddh, 077h, 0ddh, 077h, 0ddh, 077h, 0ddh, 077h, 0ddh, 077h
   657 00016F01 77DD77DD77DD77      <1>
   658 00016F08 181818181818181818- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   658 00016F11 18181818181818      <1>
   659 00016F18 18181818181818F818- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 018h, 0f8h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   659 00016F21 18181818181818      <1>
   660 00016F28 1818181818F818F818- <1>     db  018h, 018h, 018h, 018h, 018h, 0f8h, 018h, 0f8h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   660 00016F31 18181818181818      <1>
   661 00016F38 36363636363636F636- <1>     db  036h, 036h, 036h, 036h, 036h, 036h, 036h, 0f6h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   661 00016F41 36363636363636      <1>
   662 00016F48 00000000000000FE36- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 0feh, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   662 00016F51 36363636363636      <1>
   663 00016F58 0000000000F818F818- <1>     db  000h, 000h, 000h, 000h, 000h, 0f8h, 018h, 0f8h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   663 00016F61 18181818181818      <1>
   664 00016F68 3636363636F606F636- <1>     db  036h, 036h, 036h, 036h, 036h, 0f6h, 006h, 0f6h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   664 00016F71 36363636363636      <1>
   665 00016F78 363636363636363636- <1>     db  036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   665 00016F81 36363636363636      <1>
   666 00016F88 0000000000FE06F636- <1>     db  000h, 000h, 000h, 000h, 000h, 0feh, 006h, 0f6h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   666 00016F91 36363636363636      <1>
   667 00016F98 3636363636F606FE00- <1>     db  036h, 036h, 036h, 036h, 036h, 0f6h, 006h, 0feh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   667 00016FA1 00000000000000      <1>
   668 00016FA8 36363636363636FE00- <1>     db  036h, 036h, 036h, 036h, 036h, 036h, 036h, 0feh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   668 00016FB1 00000000000000      <1>
   669 00016FB8 1818181818F818F800- <1>     db  018h, 018h, 018h, 018h, 018h, 0f8h, 018h, 0f8h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   669 00016FC1 00000000000000      <1>
   670 00016FC8 00000000000000F818- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 0f8h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   670 00016FD1 18181818181818      <1>
   671 00016FD8 181818181818181F00- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 018h, 01fh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   671 00016FE1 00000000000000      <1>
   672 00016FE8 18181818181818FF00- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 018h, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   672 00016FF1 00000000000000      <1>
   673 00016FF8 00000000000000FF18- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 0ffh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   673 00017001 18181818181818      <1>
   674 00017008 181818181818181F18- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 018h, 01fh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   674 00017011 18181818181818      <1>
   675 00017018 00000000000000FF00- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   675 00017021 00000000000000      <1>
   676 00017028 18181818181818FF18- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 018h, 0ffh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   676 00017031 18181818181818      <1>
   677 00017038 18181818181F181F18- <1>     db  018h, 018h, 018h, 018h, 018h, 01fh, 018h, 01fh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   677 00017041 18181818181818      <1>
   678 00017048 363636363636363736- <1>     db  036h, 036h, 036h, 036h, 036h, 036h, 036h, 037h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   678 00017051 36363636363636      <1>
   679 00017058 363636363637303F00- <1>     db  036h, 036h, 036h, 036h, 036h, 037h, 030h, 03fh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   679 00017061 00000000000000      <1>
   680 00017068 00000000003F303736- <1>     db  000h, 000h, 000h, 000h, 000h, 03fh, 030h, 037h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   680 00017071 36363636363636      <1>
   681 00017078 3636363636F700FF00- <1>     db  036h, 036h, 036h, 036h, 036h, 0f7h, 000h, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   681 00017081 00000000000000      <1>
   682 00017088 0000000000FF00F736- <1>     db  000h, 000h, 000h, 000h, 000h, 0ffh, 000h, 0f7h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   682 00017091 36363636363636      <1>
   683 00017098 363636363637303736- <1>     db  036h, 036h, 036h, 036h, 036h, 037h, 030h, 037h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   683 000170A1 36363636363636      <1>
   684 000170A8 0000000000FF00FF00- <1>     db  000h, 000h, 000h, 000h, 000h, 0ffh, 000h, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   684 000170B1 00000000000000      <1>
   685 000170B8 3636363636F700F736- <1>     db  036h, 036h, 036h, 036h, 036h, 0f7h, 000h, 0f7h, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   685 000170C1 36363636363636      <1>
   686 000170C8 1818181818FF00FF00- <1>     db  018h, 018h, 018h, 018h, 018h, 0ffh, 000h, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   686 000170D1 00000000000000      <1>
   687 000170D8 36363636363636FF00- <1>     db  036h, 036h, 036h, 036h, 036h, 036h, 036h, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   687 000170E1 00000000000000      <1>
   688 000170E8 0000000000FF00FF18- <1>     db  000h, 000h, 000h, 000h, 000h, 0ffh, 000h, 0ffh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   688 000170F1 18181818181818      <1>
   689 000170F8 00000000000000FF36- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 0ffh, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   689 00017101 36363636363636      <1>
   690 00017108 363636363636363F00- <1>     db  036h, 036h, 036h, 036h, 036h, 036h, 036h, 03fh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   690 00017111 00000000000000      <1>
   691 00017118 18181818181F181F00- <1>     db  018h, 018h, 018h, 018h, 018h, 01fh, 018h, 01fh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   691 00017121 00000000000000      <1>
   692 00017128 00000000001F181F18- <1>     db  000h, 000h, 000h, 000h, 000h, 01fh, 018h, 01fh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   692 00017131 18181818181818      <1>
   693 00017138 000000000000003F36- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 03fh, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   693 00017141 36363636363636      <1>
   694 00017148 36363636363636FF36- <1>     db  036h, 036h, 036h, 036h, 036h, 036h, 036h, 0ffh, 036h, 036h, 036h, 036h, 036h, 036h, 036h, 036h
   694 00017151 36363636363636      <1>
   695 00017158 1818181818FF18FF18- <1>     db  018h, 018h, 018h, 018h, 018h, 0ffh, 018h, 0ffh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   695 00017161 18181818181818      <1>
   696 00017168 18181818181818F800- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 018h, 0f8h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   696 00017171 00000000000000      <1>
   697 00017178 000000000000001F18- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 01fh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   697 00017181 18181818181818      <1>
   698 00017188 FFFFFFFFFFFFFFFFFF- <1>     db  0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh
   698 00017191 FFFFFFFFFFFFFF      <1>
   699 00017198 00000000000000FFFF- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh
   699 000171A1 FFFFFFFFFFFFFF      <1>
   700 000171A8 F0F0F0F0F0F0F0F0F0- <1>     db  0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h, 0f0h
   700 000171B1 F0F0F0F0F0F0F0      <1>
   701 000171B8 0F0F0F0F0F0F0F0F0F- <1>     db  00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh, 00fh
   701 000171C1 0F0F0F0F0F0F0F      <1>
   702 000171C8 FFFFFFFFFFFFFF0000- <1>     db  0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   702 000171D1 00000000000000      <1>
   703 000171D8 000000000076DCD8D8- <1>     db  000h, 000h, 000h, 000h, 000h, 076h, 0dch, 0d8h, 0d8h, 0d8h, 0dch, 076h, 000h, 000h, 000h, 000h
   703 000171E1 D8DC7600000000      <1>
   704 000171E8 000078CCCCCCD8CCC6- <1>     db  000h, 000h, 078h, 0cch, 0cch, 0cch, 0d8h, 0cch, 0c6h, 0c6h, 0c6h, 0cch, 000h, 000h, 000h, 000h
   704 000171F1 C6C6CC00000000      <1>
   705 000171F8 0000FEC6C6C0C0C0C0- <1>     db  000h, 000h, 0feh, 0c6h, 0c6h, 0c0h, 0c0h, 0c0h, 0c0h, 0c0h, 0c0h, 0c0h, 000h, 000h, 000h, 000h
   705 00017201 C0C0C000000000      <1>
   706 00017208 00000000FE6C6C6C6C- <1>     db  000h, 000h, 000h, 000h, 0feh, 06ch, 06ch, 06ch, 06ch, 06ch, 06ch, 06ch, 000h, 000h, 000h, 000h
   706 00017211 6C6C6C00000000      <1>
   707 00017218 000000FEC660301830- <1>     db  000h, 000h, 000h, 0feh, 0c6h, 060h, 030h, 018h, 030h, 060h, 0c6h, 0feh, 000h, 000h, 000h, 000h
   707 00017221 60C6FE00000000      <1>
   708 00017228 00000000007ED8D8D8- <1>     db  000h, 000h, 000h, 000h, 000h, 07eh, 0d8h, 0d8h, 0d8h, 0d8h, 0d8h, 070h, 000h, 000h, 000h, 000h
   708 00017231 D8D87000000000      <1>
   709 00017238 000000006666666666- <1>     db  000h, 000h, 000h, 000h, 066h, 066h, 066h, 066h, 066h, 07ch, 060h, 060h, 0c0h, 000h, 000h, 000h
   709 00017241 7C6060C0000000      <1>
   710 00017248 0000000076DC181818- <1>     db  000h, 000h, 000h, 000h, 076h, 0dch, 018h, 018h, 018h, 018h, 018h, 018h, 000h, 000h, 000h, 000h
   710 00017251 18181800000000      <1>
   711 00017258 0000007E183C666666- <1>     db  000h, 000h, 000h, 07eh, 018h, 03ch, 066h, 066h, 066h, 03ch, 018h, 07eh, 000h, 000h, 000h, 000h
   711 00017261 3C187E00000000      <1>
   712 00017268 000000386CC6C6FEC6- <1>     db  000h, 000h, 000h, 038h, 06ch, 0c6h, 0c6h, 0feh, 0c6h, 0c6h, 06ch, 038h, 000h, 000h, 000h, 000h
   712 00017271 C66C3800000000      <1>
   713 00017278 0000386CC6C6C66C6C- <1>     db  000h, 000h, 038h, 06ch, 0c6h, 0c6h, 0c6h, 06ch, 06ch, 06ch, 06ch, 0eeh, 000h, 000h, 000h, 000h
   713 00017281 6C6CEE00000000      <1>
   714 00017288 00001E30180C3E6666- <1>     db  000h, 000h, 01eh, 030h, 018h, 00ch, 03eh, 066h, 066h, 066h, 066h, 03ch, 000h, 000h, 000h, 000h
   714 00017291 66663C00000000      <1>
   715 00017298 00000000007EDBDBDB- <1>     db  000h, 000h, 000h, 000h, 000h, 07eh, 0dbh, 0dbh, 0dbh, 07eh, 000h, 000h, 000h, 000h, 000h, 000h
   715 000172A1 7E000000000000      <1>
   716 000172A8 00000003067EDBDBF3- <1>     db  000h, 000h, 000h, 003h, 006h, 07eh, 0dbh, 0dbh, 0f3h, 07eh, 060h, 0c0h, 000h, 000h, 000h, 000h
   716 000172B1 7E60C000000000      <1>
   717 000172B8 00001C3060607C6060- <1>     db  000h, 000h, 01ch, 030h, 060h, 060h, 07ch, 060h, 060h, 060h, 030h, 01ch, 000h, 000h, 000h, 000h
   717 000172C1 60301C00000000      <1>
   718 000172C8 0000007CC6C6C6C6C6- <1>     db  000h, 000h, 000h, 07ch, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 0c6h, 000h, 000h, 000h, 000h
   718 000172D1 C6C6C600000000      <1>
   719 000172D8 00000000FE0000FE00- <1>     db  000h, 000h, 000h, 000h, 0feh, 000h, 000h, 0feh, 000h, 000h, 0feh, 000h, 000h, 000h, 000h, 000h
   719 000172E1 00FE0000000000      <1>
   720 000172E8 0000000018187E1818- <1>     db  000h, 000h, 000h, 000h, 018h, 018h, 07eh, 018h, 018h, 000h, 000h, 0ffh, 000h, 000h, 000h, 000h
   720 000172F1 0000FF00000000      <1>
   721 000172F8 00000030180C060C18- <1>     db  000h, 000h, 000h, 030h, 018h, 00ch, 006h, 00ch, 018h, 030h, 000h, 07eh, 000h, 000h, 000h, 000h
   721 00017301 30007E00000000      <1>
   722 00017308 0000000C1830603018- <1>     db  000h, 000h, 000h, 00ch, 018h, 030h, 060h, 030h, 018h, 00ch, 000h, 07eh, 000h, 000h, 000h, 000h
   722 00017311 0C007E00000000      <1>
   723 00017318 00000E1B1B18181818- <1>     db  000h, 000h, 00eh, 01bh, 01bh, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h
   723 00017321 18181818181818      <1>
   724 00017328 1818181818181818D8- <1>     db  018h, 018h, 018h, 018h, 018h, 018h, 018h, 018h, 0d8h, 0d8h, 0d8h, 070h, 000h, 000h, 000h, 000h
   724 00017331 D8D87000000000      <1>
   725 00017338 000000001818007E00- <1>     db  000h, 000h, 000h, 000h, 018h, 018h, 000h, 07eh, 000h, 018h, 018h, 000h, 000h, 000h, 000h, 000h
   725 00017341 18180000000000      <1>
   726 00017348 000000000076DC0076- <1>     db  000h, 000h, 000h, 000h, 000h, 076h, 0dch, 000h, 076h, 0dch, 000h, 000h, 000h, 000h, 000h, 000h
   726 00017351 DC000000000000      <1>
   727 00017358 00386C6C3800000000- <1>     db  000h, 038h, 06ch, 06ch, 038h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   727 00017361 00000000000000      <1>
   728 00017368 000000000000001818- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 018h, 018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   728 00017371 00000000000000      <1>
   729 00017378 000000000000000018- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 018h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   729 00017381 00000000000000      <1>
   730 00017388 000F0C0C0C0C0CEC6C- <1>     db  000h, 00fh, 00ch, 00ch, 00ch, 00ch, 00ch, 0ech, 06ch, 06ch, 03ch, 01ch, 000h, 000h, 000h, 000h
   730 00017391 6C3C1C00000000      <1>
   731 00017398 00D86C6C6C6C6C0000- <1>     db  000h, 0d8h, 06ch, 06ch, 06ch, 06ch, 06ch, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   731 000173A1 00000000000000      <1>
   732 000173A8 0070D83060C8F80000- <1>     db  000h, 070h, 0d8h, 030h, 060h, 0c8h, 0f8h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   732 000173B1 00000000000000      <1>
   733 000173B8 000000007C7C7C7C7C- <1>     db  000h, 000h, 000h, 000h, 07ch, 07ch, 07ch, 07ch, 07ch, 07ch, 07ch, 000h, 000h, 000h, 000h, 000h
   733 000173C1 7C7C0000000000      <1>
   734 000173C8 000000000000000000- <1>     db  000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
   734 000173D1 00000000000000      <1>
   735                              <1> 
   736                              <1> ; 01/01/2021 (TRDOS 386 v2.0.3)
   737                              <1> 
   738                              <1> %if 0
   739                              <1> 
   740                              <1> vgafont14alt:
   741                              <1>     db  01dh, 000h, 000h, 000h, 000h, 024h, 066h, 0ffh, 066h, 024h, 000h, 000h, 000h, 000h, 000h, 022h
   742                              <1>     db  000h, 063h, 063h, 063h, 022h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 02bh, 000h
   743                              <1>     db  000h, 000h, 018h, 018h, 018h, 0ffh, 018h, 018h, 018h, 000h, 000h, 000h, 000h, 02dh, 000h, 000h
   744                              <1>     db  000h, 000h, 000h, 000h, 0ffh, 000h, 000h, 000h, 000h, 000h, 000h, 000h, 04dh, 000h, 000h, 0c3h
   745                              <1>     db  0e7h, 0ffh, 0dbh, 0c3h, 0c3h, 0c3h, 0c3h, 0c3h, 000h, 000h, 000h, 054h, 000h, 000h, 0ffh, 0dbh
   746                              <1>     db  099h, 018h, 018h, 018h, 018h, 018h, 03ch, 000h, 000h, 000h, 056h, 000h, 000h, 0c3h, 0c3h, 0c3h
   747                              <1>     db  0c3h, 0c3h, 0c3h, 066h, 03ch, 018h, 000h, 000h, 000h, 057h, 000h, 000h, 0c3h, 0c3h, 0c3h, 0c3h
   748                              <1>     db  0dbh, 0dbh, 0ffh, 066h, 066h, 000h, 000h, 000h, 058h, 000h, 000h, 0c3h, 0c3h, 066h, 03ch, 018h
   749                              <1>     db  03ch, 066h, 0c3h, 0c3h, 000h, 000h, 000h, 059h, 000h, 000h, 0c3h, 0c3h, 0c3h, 066h, 03ch, 018h
   750                              <1>     db  018h, 018h, 03ch, 000h, 000h, 000h, 05ah, 000h, 000h, 0ffh, 0c3h, 086h, 00ch, 018h, 030h, 061h
   751                              <1>     db  0c3h, 0ffh, 000h, 000h, 000h, 06dh, 000h, 000h, 000h, 000h, 000h, 0e6h, 0ffh, 0dbh, 0dbh, 0dbh
   752                              <1>     db  0dbh, 000h, 000h, 000h, 076h, 000h, 000h, 000h, 000h, 000h, 0c3h, 0c3h, 0c3h, 066h, 03ch, 018h
   753                              <1>     db  000h, 000h, 000h, 077h, 000h, 000h, 000h, 000h, 000h, 0c3h, 0c3h, 0dbh, 0dbh, 0ffh, 066h, 000h
   754                              <1>     db  000h, 000h, 091h, 000h, 000h, 000h, 000h, 06eh, 03bh, 01bh, 07eh, 0d8h, 0dch, 077h, 000h, 000h
   755                              <1>     db  000h, 09bh, 000h, 018h, 018h, 07eh, 0c3h, 0c0h, 0c0h, 0c3h, 07eh, 018h, 018h, 000h, 000h, 000h
   756                              <1>     db  09dh, 000h, 000h, 0c3h, 066h, 03ch, 018h, 0ffh, 018h, 0ffh, 018h, 018h, 000h, 000h, 000h, 09eh
   757                              <1>     db  000h, 0fch, 066h, 066h, 07ch, 062h, 066h, 06fh, 066h, 066h, 0f3h, 000h, 000h, 000h, 0f1h, 000h
   758                              <1>     db  000h, 018h, 018h, 018h, 0ffh, 018h, 018h, 018h, 000h, 0ffh, 000h, 000h, 000h, 0f6h, 000h, 000h
   759                              <1>     db  018h, 018h, 000h, 000h, 0ffh, 000h, 000h, 018h, 018h, 000h, 000h, 000h, 000h
   760                              <1> vgafont16alt:
   761                              <1>     db  01dh, 000h, 000h, 000h, 000h, 000h, 024h, 066h, 0ffh, 066h, 024h, 000h, 000h, 000h, 000h, 000h
   762                              <1>     db  000h, 030h, 000h, 000h, 03ch, 066h, 0c3h, 0c3h, 0dbh, 0dbh, 0c3h, 0c3h, 066h, 03ch, 000h, 000h
   763                              <1>     db  000h, 000h, 04dh, 000h, 000h, 0c3h, 0e7h, 0ffh, 0ffh, 0dbh, 0c3h, 0c3h, 0c3h, 0c3h, 0c3h, 000h
   764                              <1>     db  000h, 000h, 000h, 054h, 000h, 000h, 0ffh, 0dbh, 099h, 018h, 018h, 018h, 018h, 018h, 018h, 03ch
   765                              <1>     db  000h, 000h, 000h, 000h, 056h, 000h, 000h, 0c3h, 0c3h, 0c3h, 0c3h, 0c3h, 0c3h, 0c3h, 066h, 03ch
   766                              <1>     db  018h, 000h, 000h, 000h, 000h, 057h, 000h, 000h, 0c3h, 0c3h, 0c3h, 0c3h, 0c3h, 0dbh, 0dbh, 0ffh
   767                              <1>     db  066h, 066h, 000h, 000h, 000h, 000h, 058h, 000h, 000h, 0c3h, 0c3h, 066h, 03ch, 018h, 018h, 03ch
   768                              <1>     db  066h, 0c3h, 0c3h, 000h, 000h, 000h, 000h, 059h, 000h, 000h, 0c3h, 0c3h, 0c3h, 066h, 03ch, 018h
   769                              <1>     db  018h, 018h, 018h, 03ch, 000h, 000h, 000h, 000h, 05ah, 000h, 000h, 0ffh, 0c3h, 086h, 00ch, 018h
   770                              <1>     db  030h, 060h, 0c1h, 0c3h, 0ffh, 000h, 000h, 000h, 000h, 06dh, 000h, 000h, 000h, 000h, 000h, 0e6h
   771                              <1>     db  0ffh, 0dbh, 0dbh, 0dbh, 0dbh, 0dbh, 000h, 000h, 000h, 000h, 076h, 000h, 000h, 000h, 000h, 000h
   772                              <1>     db  0c3h, 0c3h, 0c3h, 0c3h, 066h, 03ch, 018h, 000h, 000h, 000h, 000h, 077h, 000h, 000h, 000h, 000h
   773                              <1>     db  000h, 0c3h, 0c3h, 0c3h, 0dbh, 0dbh, 0ffh, 066h, 000h, 000h, 000h, 000h, 078h, 000h, 000h, 000h
   774                              <1>     db  000h, 000h, 0c3h, 066h, 03ch, 018h, 03ch, 066h, 0c3h, 000h, 000h, 000h, 000h, 091h, 000h, 000h
   775                              <1>     db  000h, 000h, 000h, 06eh, 03bh, 01bh, 07eh, 0d8h, 0dch, 077h, 000h, 000h, 000h, 000h, 09bh, 000h
   776                              <1>     db  018h, 018h, 07eh, 0c3h, 0c0h, 0c0h, 0c0h, 0c3h, 07eh, 018h, 018h, 000h, 000h, 000h, 000h, 09dh
   777                              <1>     db  000h, 000h, 0c3h, 066h, 03ch, 018h, 0ffh, 018h, 0ffh, 018h, 018h, 018h, 000h, 000h, 000h, 000h
   778                              <1>     db  09eh, 000h, 0fch, 066h, 066h, 07ch, 062h, 066h, 06fh, 066h, 066h, 066h, 0f3h, 000h, 000h, 000h
   779                              <1>     db  000h, 0abh, 000h, 0c0h, 0c0h, 0c2h, 0c6h, 0cch, 018h, 030h, 060h, 0ceh, 09bh, 006h, 00ch, 01fh
   780                              <1>     db  000h, 000h, 0ach, 000h, 0c0h, 0c0h, 0c2h, 0c6h, 0cch, 018h, 030h, 066h, 0ceh, 096h, 03eh, 006h
   781                              <1>     db  006h, 000h, 000h, 000h
   782                              <1> 
   783                              <1> %endif
  3661                                  
  3662                                  ; 20/11/2020
  3663                                  vbe2_bochs_vbios:
  3664                                  ;	db "BOCHS/QEMU"
  3665 000173D8 424F4348532F51454D-     	db "BOCHS/QEMU/VIRTUALBOX"  ; 26/11/2020
  3665 000173E1 552F5649525455414C-
  3665 000173EA 424F58             
  3666                                  ;vbe_vnumber equ vbe2_bochs_vbios + 28 ; "3" or "2"
  3667                                  ; 26/11/2020
  3668                                  vbe_vnumber equ vbe2_bochs_vbios + 30 ; "3" or "2"
  3669                                  ; 15/11/2020
  3670                                  vesa_vbe3_bios_msg:
  3671                                  	;db " VESA VBE version 3 Video BIOS ..."
  3672 000173ED 205645534120564245-     	db " VESA VBE3 Video BIOS ..." ; 26/11/2020
  3672 000173F6 3320566964656F2042-
  3672 000173FF 494F53202E2E2E     
  3673 00017406 0D0A0D0A00              	db 0Dh, 0Ah, 0Dh, 0Ah, 0
  3674                                  
  3675                                  ; 28/02/2021
  3676 0001740B 18                      truecolor: db 24
  3677                                  
  3678                                  align 2
  3679                                  
  3680                                  ; EPOCH Variables
  3681                                  ; 13/04/2015 - Retro UNIX 386 v1 Beginning
  3682                                  ; 09/04/2013 epoch variables
  3683                                  ; Retro UNIX 8086 v1 Prototype: UNIXCOPY.ASM, 10/03/2013
  3684                                  ;
  3685 0001740C B207                    year: 	dw 1970
  3686 0001740E 0100                    month: 	dw 1
  3687 00017410 0100                    day: 	dw 1
  3688 00017412 0000                    hour: 	dw 0
  3689 00017414 0000                    minute: dw 0
  3690 00017416 0000                    second: dw 0
  3691                                  
  3692                                  DMonth:
  3693 00017418 0000                    	dw 0
  3694 0001741A 1F00                    	dw 31
  3695 0001741C 3B00                    	dw 59
  3696 0001741E 5A00                    	dw 90
  3697 00017420 7800                    	dw 120
  3698 00017422 9700                    	dw 151
  3699 00017424 B500                    	dw 181
  3700 00017426 D400                    	dw 212
  3701 00017428 F300                    	dw 243
  3702 0001742A 1101                    	dw 273
  3703 0001742C 3001                    	dw 304
  3704 0001742E 4E01                    	dw 334
  3705                                  
  3706                                  ; 15/11/2020
  3707 00017430 00                      db	0
  3708                                  kernel_version_msg: ; 17/04/2021
  3709                                  ;;;db	"TRDOS (386) Kernel v2.0.4 by Erdogan Tan"
  3710                                  ;;db	"TRDOS (386) Kernel v2.0.5 by Erdogan Tan" ; 11/08/2022
  3711                                  ;db	"TRDOS (386) Kernel v2.0.6 by Erdogan Tan" ; 29/08/2023
  3712 00017431 5452444F5320283338-     db	"TRDOS (386) Kernel v2.0.7 by Erdogan Tan" ; 20/10/2023
  3712 0001743A 3629204B65726E656C-
  3712 00017443 2076322E302E372062-
  3712 0001744C 79204572646F67616E-
  3712 00017455 2054616E           
  3713 00017459 00                      db	0
  3714                                  
  3715                                  ; 20/02/2017
  3716                                  KERNELFSIZE  equ $  ; 04/07/2016
  3717                                  
  3718                                  bss_start:
  3719                                  
  3720                                  ABSOLUTE bss_start
  3721                                  
  3722 0001745A ????????????            alignb 8 ; 25/12/2016
  3723                                  
  3724                                  	; 15/04/2016
  3725                                  	; TRDOS 386 (TRDOS v2.0)
  3726                                  	; 	80 interrupts 	
  3727                                  	; 11/03/2015
  3728                                  	; Interrupt Descriptor Table (20/08/2014)
  3729                                  idt:
  3730                                  	;resb	64*8 ; INT 0 to INT 3Fh
  3731                                  	; 15/04/2016
  3732 00017460 <res 280h>              	resb	80*8 ; INT 0 to INT 4Fh
  3733                                  
  3734                                  idt_end:
  3735                                  
  3736                                  ;alignb 4
  3737                                  
  3738                                  task_state_segment:
  3739                                  	; 24/03/2015
  3740 000176E0 ????                    tss.link:   resw 1
  3741 000176E2 ????                    	    resw 1
  3742                                  ; tss offset 4	
  3743 000176E4 ????????                tss.esp0:   resd 1
  3744 000176E8 ????                    tss.ss0:    resw 1
  3745 000176EA ????                    	    resw 1	
  3746 000176EC ????????                tss.esp1:   resd 1
  3747 000176F0 ????                    tss.ss1:    resw 1
  3748 000176F2 ????                    	    resw 1 	
  3749 000176F4 ????????                tss.esp2:   resd 1
  3750 000176F8 ????                    tss.ss2:    resw 1
  3751 000176FA ????                    	    resw 1
  3752                                  ; tss offset 28
  3753 000176FC ????????                tss.CR3:    resd 1
  3754 00017700 ????????                tss.eip:    resd 1
  3755 00017704 ????????                tss.eflags: resd 1
  3756                                  ; tss offset 40
  3757 00017708 ????????                tss.eax:    resd 1		 		
  3758 0001770C ????????                tss.ecx:    resd 1
  3759 00017710 ????????                tss.edx:    resd 1
  3760 00017714 ????????                tss.ebx:    resd 1
  3761 00017718 ????????                tss.esp:    resd 1
  3762 0001771C ????????                tss.ebp:    resd 1
  3763 00017720 ????????                tss.esi:    resd 1
  3764 00017724 ????????                tss.edi:    resd 1
  3765                                  ; tss offset 72
  3766 00017728 ????                    tss.ES:     resw 1
  3767 0001772A ????                    	    resw 1	
  3768 0001772C ????                    tss.CS:	    resw 1
  3769 0001772E ????                    	    resw 1
  3770 00017730 ????                    tss.SS:	    resw 1
  3771 00017732 ????                    	    resw 1
  3772 00017734 ????                    tss.DS:	    resw 1
  3773 00017736 ????                    	    resw 1
  3774 00017738 ????                    tss.FS:	    resw 1
  3775 0001773A ????                    	    resw 1
  3776 0001773C ????                    tss.GS:	    resw 1
  3777 0001773E ????                    	    resw 1		
  3778 00017740 ????                    tss.LDTR:   resw 1
  3779 00017742 ????                    	    resw 1
  3780                                  ; tss offset 100		
  3781 00017744 ????                    	    resw 1		
  3782 00017746 ????                    tss.IOPB:   resw 1
  3783                                  ; tss offset 104 
  3784                                  tss_end:
  3785                                  
  3786 00017748 ????????                k_page_dir:  resd 1 ; Kernel's (System) Page Directory address
  3787                                  		    ; (Physical address = Virtual address)	 	
  3788 0001774C ????????                memory_size: resd 1 ; memory size in pages
  3789 00017750 ????????                free_pages:  resd 1 ; number of free pages		
  3790 00017754 ????????                next_page:   resd 1 ; offset value in M.A.T. for
  3791                                  		    ; first free page search
  3792 00017758 ????????                last_page:   resd 1 ; offset value in M.A.T. which
  3793                                  		    ; next free page search will be
  3794                                  		    ; stopped after it. (end of M.A.T.)
  3795 0001775C ????????                first_page:  resd 1 ; offset value in M.A.T. which
  3796                                  		    ; first free page search
  3797                                  		    ; will be started on it. (for user)
  3798 00017760 ????????                mat_size:    resd 1 ; Memory Allocation Table size in pages
  3799                                  
  3800                                  ; 20/11/2020
  3801                                  ;vbe2bios:    resw 1 ; VBE2 video bios ID (bochs/qemu)
  3802                                  ;		    ; (0B0C4h or 0B0C5h for bochs/plex86 vgabios)				
  3803                                  
  3804                                  ; 02/09/2014 (Retro UNIX 386 v1)
  3805                                  ; 04/12/2013 (Retro UNIX 8086 v1)
  3806 00017764 ????                    CRT_START:   resw 1 	  ; starting address in regen buffer
  3807                                  			  ; NOTE: active page only	
  3808 00017766 <res 10h>               CURSOR_POSN: resw 8 ; cursor positions for video pages
  3809                                  ACTIVE_PAGE: 
  3810 00017776 ??                      ptty: 	     resb 1 ; current tty
  3811                                  ; 01/07/2015 - 29/01/2016
  3812 00017777 ??                      ccolor:	     resb 1 ; current color attribute
  3813                                  ; 26/10/2015
  3814                                  ; 07/09/2014
  3815 00017778 <res 14h>               ttychr:      resw ntty+2 ; Character buffer (multiscreen)
  3816                                  
  3817                                  ; 18/05/2015 (03/06/2013 - Retro UNIX 8086 v1 feature only!)
  3818 0001778C ????????                p_time:      resd 1     ; present time (for systime & sysmdate)
  3819                                  
  3820                                  ; 18/05/2015 (16/08/2013 - Retro UNIX 8086 v1 feature only !)
  3821                                  ; (open mode locks for pseudo TTYs)
  3822                                  ; [ major tty locks (return error in any conflicts) ]
  3823 00017790 <res 14h>               ttyl:        resw ntty+2 ; opening locks for TTYs.
  3824                                  
  3825                                  ; 15/04/2015 (Retro UNIX 386 v1)
  3826                                  ; 22/09/2013 (Retro UNIX 8086 v1)
  3827 000177A4 <res Ah>                wlist:       resb ntty+2 ; wait channel list (0 to 9 for TTYs)
  3828                                  ; 15/04/2015 (Retro UNIX 386 v1)
  3829                                  ;; 12/07/2014 -> sp_init set comm. parameters as 0E3h
  3830                                  ;; 0 means serial port is not available 
  3831                                  ;;comprm: ; 25/06/2014
  3832 000177AE ??                      com1p:       resb 1  ;;0E3h
  3833 000177AF ??                      com2p:       resb 1  ;;0E3h
  3834                                  
  3835                                  ; 17/11/2015
  3836                                  ; request for response (from the terminal)	
  3837 000177B0 ????                    req_resp:    resw 1 			
  3838                                  ; 07/11/2015
  3839 000177B2 ??                      ccomport:    resb 1 ; current COM (serial) port
  3840                                  		    ; (0= COM1, 1= COM2)
  3841                                  ; 09/11/2015
  3842 000177B3 ??                      comqr:	     resb 1 ; 'query or response' sign (u9.s, 'sndc')
  3843                                  ; 07/11/2015
  3844 000177B4 ????                    rchar:	     resw 1 ; last received char for COM 1 and COM 2		
  3845 000177B6 ????                    schar:	     resw 1 ; last sent char for COM 1 and COM 2
  3846                                  
  3847                                  ; 22/08/2014 (RTC)
  3848                                  ; (Packed BCD)
  3849 000177B8 ??                      time_seconds: resb 1
  3850 000177B9 ??                      time_minutes: resb 1
  3851 000177BA ??                      time_hours:   resb 1
  3852 000177BB ??                      date_wday:    resb 1
  3853 000177BC ??                      date_day:     resb 1
  3854 000177BD ??                      date_month:   resb 1			
  3855 000177BE ??                      date_year:    resb 1
  3856 000177BF ??                      date_century: resb 1
  3857                                  
  3858                                  ; 24/01/2016
  3859 000177C0 ????????                RTC_LH:	       resd 1
  3860 000177C4 ??                      RTC_WAIT_FLAG: resb 1
  3861 000177C5 ??                      USER_FLAG:     resb 1
  3862                                  ; 19/05/2016
  3863                                  ;RTC_second:
  3864 000177C6 ??                      RTC_2Hz:       resb 1 ;  from 2Hz interrupt to 1Hz timer event function	
  3865                                  
  3866                                  %include 'diskbss.s'	; UNINITIALIZED DISK (BIOS) DATA
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel) - v2.0.5 - diskbss.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 06/08/2022 (Previous: 24/01/2016)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 24/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Turkish Rational DOS
    11                              <1> ; Operating System Project v2.0 by ERDOGAN TAN (Beginning: 04/01/2016)
    12                              <1> ;
    13                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    14                              <1> ; diskbss.inc (10/07/2015)
    15                              <1> ;
    16                              <1> ; Derived from 'IBM PC-XT-286' BIOS source code (1986) 
    17                              <1> ; ****************************************************************************
    18                              <1> 
    19                              <1> ; Retro UNIX 386 v1 Kernel - DISKBSS.INC
    20                              <1> ; Last Modification: 10/07/2015
    21                              <1> ;	(Unitialized Disk Parameters Data section for 'DISKIO.INC') 
    22                              <1> 
    23 000177C7 ??                  <1> alignb 2
    24                              <1> 
    25                              <1> ;----------------------------------------
    26                              <1> ;	TIMER DATA AREA 		:
    27                              <1> ;----------------------------------------
    28                              <1> 
    29                              <1> TIMER_LH:	; 16/02/2015
    30 000177C8 ????                <1> TIMER_LOW:      resw	1               ; LOW WORD OF TIMER COUNT
    31 000177CA ????                <1> TIMER_HIGH:     resw	1               ; HIGH WORD OF TIMER COUNT
    32 000177CC ??                  <1> TIMER_OFL:      resb 	1               ; TIMER HAS ROLLED OVER SINCE LAST READ
    33                              <1> 
    34                              <1> ;----------------------------------------
    35                              <1> ;	DISKETTE DATA AREAS		:
    36                              <1> ;----------------------------------------
    37                              <1> 
    38 000177CD ??                  <1> SEEK_STATUS:	resb	1
    39 000177CE ??                  <1> MOTOR_STATUS:	resb	1
    40 000177CF ??                  <1> MOTOR_COUNT:	resb	1
    41 000177D0 ??                  <1> DSKETTE_STATUS:	resb	1
    42 000177D1 ??????????????      <1> NEC_STATUS:	resb	7
    43                              <1> 
    44                              <1> ;----------------------------------------
    45                              <1> ;	ADDITIONAL MEDIA DATA		:
    46                              <1> ;----------------------------------------
    47                              <1> 
    48 000177D8 ??                  <1> LASTRATE:	resb 	1
    49 000177D9 ??                  <1> HF_STATUS:	resb 	1
    50                              <1> ; 06/08/2022
    51                              <1> ;HF_ERROR:	resb 	1
    52 000177DA ??                  <1> HF_INT_FLAG:	resb 	1
    53                              <1> ; 06/08/2022
    54                              <1> ;HF_CNTRL:	resb 	1
    55                              <1> ;DSK_STATE:	resb 	4
    56                              <1> ; 06/08/2022
    57 000177DB ????                <1> DSK_STATE:	resb	2 	
    58 000177DD ????                <1> DSK_TRK:	resb 	2
    59                              <1> 
    60                              <1> ;----------------------------------------
    61                              <1> ;	FIXED DISK DATA AREAS		:
    62                              <1> ;----------------------------------------
    63                              <1> 
    64 000177DF ??                  <1> DISK_STATUS1:	resb 	1		; FIXED DISK STATUS
    65 000177E0 ??                  <1> HF_NUM:		resb 	1		; COUNT OF FIXED DISK DRIVES
    66 000177E1 ??                  <1> CONTROL_BYTE:	resb 	1		; HEAD CONTROL BYTE
    67                              <1> ;@PORT_OFF	resb	1		; RESERVED (PORT OFFSET)
    68                              <1> ;port1_off	resb	1		; Hard disk controller 1 - port offset
    69                              <1> ;port2_off	resb	1		; Hard disk controller 2 - port offset
    70                              <1> 
    71 000177E2 ????                <1> alignb 4
    72                              <1> 
    73                              <1> ;HF_TBL_VEC:	resd	1 		; Primary master disk param. tbl. pointer
    74                              <1> ;HF1_TBL_VEC:	resd	1		; Primary slave disk param. tbl. pointer
    75                              <1> HF_TBL_VEC: ; 22/12/2014	
    76 000177E4 ????????            <1> HDPM_TBL_VEC:	resd	1 		; Primary master disk param. tbl. pointer
    77 000177E8 ????????            <1> HDPS_TBL_VEC:	resd	1		; Primary slave disk param. tbl. pointer
    78 000177EC ????????            <1> HDSM_TBL_VEC:	resd	1 		; Secondary master disk param. tbl. pointer
    79 000177F0 ????????            <1> HDSS_TBL_VEC:	resd	1		; Secondary slave disk param. tbl. pointer
    80                              <1> 
    81                              <1> ; 03/01/2015
    82 000177F4 ??                  <1> LBAMode:     	resb	1
    83                              <1> 
    84                              <1> ; *****************************************************************************
  3867                                  
  3868                                  ;;; Real Mode Data (10/07/2015 - BSS)
  3869                                  
  3870                                  ;alignb 2
  3871                                  
  3872                                  ; 10/01/2016
  3873                                  %include 'trdoskx.s'	; UNINITIALIZED KERNEL (Logical Drive & FS) DATA
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.7) - UNINITIALIZED DATA : trdoskx.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 21/11/2023 (Previous: 29/06/2022 - Kernel v2.0.5)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 04/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.11 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Derived from TRDOS Operating System v1.0 (8086) source code by Erdogan Tan
    11                              <1> ; TRDOS2.ASM (09/11/2011)
    12                              <1> ; ****************************************************************************
    13                              <1> ; DRV_INIT.ASM [26/09/2009] Last Update: 07/08/2011
    14                              <1> ; MAINPROG.ASM [17/01/2004] Last Update: 09/11/2011
    15                              <1> ; DIR.ASM      [17/01/2004] Last Update: 09/10/2011
    16                              <1> ; CMD_INTR.ASM [29/01/2005] Last update: 09/11/2011
    17                              <1> ; DRV_FAT.ASM  [07/07/2009] Last update: 21/08/2011
    18                              <1> 
    19 000177F5 ??????              <1> alignb 4
    20                              <1> 
    21                              <1> ; MAINPROG.ASM
    22 000177F8 ????????            <1> MainProgCfg_FileSize:   resd 1 ; 14/04/2016
    23 000177FC ????????            <1> MainProgCfg_LineOffset: resd 1 ; 14/04/2016
    24                              <1> 
    25 00017800 ????????            <1> Current_VolSerial: resd 1
    26                              <1> 
    27 00017804 ????????            <1> Current_Dir_FCluster: resd 1
    28                              <1> 
    29 00017808 ??                  <1> Current_Dir_Level: resb 1
    30 00017809 ??                  <1> Current_FATType: resb 1
    31 0001780A ??                  <1> Current_Drv: resb 1
    32 0001780B ??                  <1> Current_Dir_Drv:   resb 1 ; '?'
    33 0001780C ??                  <1>                    resb 1 ; ':'
    34 0001780D ??                  <1> Current_Dir_Root:  resb 1 ; '/' 
    35 0001780E <res 5Ah>           <1> Current_Directory: resb 90
    36 00017868 ??                  <1> End_Of_Current_Dir_Str: resb 1
    37 00017869 ??                  <1> Current_Dir_StrLen: resb 1   
    38                              <1> 
    39 0001786A ??                  <1> CursorColumn: 	resb 1
    40 0001786B ??                  <1> CmdArgStart:    resb 1
    41                              <1> 
    42                              <1> ; 03/02/2016
    43 0001786C <res 4Eh>           <1> Remark:		resb 78
    44                              <1> 
    45 000178BA <res 50h>           <1> CommandBuffer: 	resb 80
    46                              <1> 
    47 0001790A <res 100h>          <1> TextBuffer:	resb 256
    48                              <1> 
    49                              <1> MasterBootBuff:
    50 00017A0A <res 1BEh>          <1> MasterBootCode: resb 1BEh
    51 00017BC8 <res 40h>           <1> PartitionTable: resb 64
    52 00017C08 ????                <1> MBIDCode: resw 1
    53                              <1> 
    54                              <1> PTable_Buffer:
    55 00017C0A <res 40h>           <1> PTable_hd0: resb 64
    56 00017C4A <res 40h>           <1> PTable_hd1: resb 64
    57 00017C8A <res 40h>           <1> PTable_hd2: resb 64
    58 00017CCA <res 40h>           <1> PTable_hd3: resb 64
    59                              <1> ; 15/07/2020
    60                              <1> ;PTable_ep0: resb 64
    61                              <1> ;PTable_ep1: resb 64
    62                              <1> ;PTable_ep2: resb 64
    63                              <1> ;PTable_ep3: resb 64
    64                              <1> 
    65                              <1> ; 13/08/2020
    66 00017D0A ??                  <1> scount: resb 1 ; 16/05/2016 (diskio.s, 'int33h:')
    67 00017D0B ??                  <1> 	resb 1
    68 00017D0C ??                  <1> 	resb 1
    69 00017D0D ??                  <1> 	resb 1
    70                              <1> 	
    71 00017D0E ??                  <1> HD_LBA_yes: resb 1
    72 00017D0F ??                  <1> PP_Counter: resb 1
    73 00017D10 ??                  <1> EP_Counter: resb 1
    74                              <1> ; 13/08/2020
    75 00017D11 ??                  <1> LD_Counter: resb 1
    76                              <1> 
    77                              <1> ; 30/08/2020
    78 00017D12 ????????            <1> MBR_EP_StartSector: resd 1 
    79                              <1> 		; Extd partition start sector as in MBR
    80 00017D16 ????????            <1> EP_StartSector: resd 1 ; next extd partition start sector
    81                              <1> 	; 15/07/2020	
    82                              <1>                 ;resd 1
    83                              <1>                 ;resd 1
    84                              <1> 
    85                              <1> ; 20/07/2020
    86 00017D1A <res 200h>          <1> DOSBootSectorBuff: resb 512
    87                              <1> ; 15/07/2020
    88                              <1> ;DOSBootSectorBuff: resb 446 ; 1BEh
    89                              <1> ;MiniPartitionTable: resb 64 ;  40h
    90                              <1> ;MiniPartitionMagic: resw  1 ;  02h 		
    91                              <1> 
    92                              <1> FAT_BuffDescriptor:
    93 00017F1A ????????            <1> FAT_CurrentCluster: resd 1
    94 00017F1E ??                  <1> FAT_BuffValidData: resb 1
    95 00017F1F ??                  <1> FAT_BuffDrvName: resb 1
    96 00017F20 ????                <1> FAT_BuffOffset: resw 1
    97 00017F22 ????????            <1> FAT_BuffSector: resd 1
    98                              <1> 
    99 00017F26 ????????            <1> FAT_ClusterCounter: resd 1
   100 00017F2A ????????            <1> LastCluster: resd 1
   101                              <1> 
   102                              <1> ; 16/05/2016
   103                              <1> ;; 18/03/2016 (TRDOS v2.0)
   104                              <1> ;ClusterBuffer_Valid: resb 1
   105                              <1> 
   106                              <1> ; 29/07/2022
   107 00017F2E ??                  <1> resb 1
   108                              <1> 
   109                              <1> Dir_BuffDescriptor:
   110 00017F2F ??                  <1> DirBuff_DRV: resb 1
   111 00017F30 ??                  <1> DirBuff_FATType: resb 1
   112 00017F31 ??                  <1> DirBuff_ValidData: resb 1
   113 00017F32 ????                <1> DirBuff_CurrentEntry: resw 1
   114 00017F34 ????                <1> DirBuff_LastEntry: resw 1
   115 00017F36 ????????            <1> DirBuff_Cluster: resd 1 
   116 00017F3A ????                <1> DirBuffer_Size: resw 1
   117                              <1> ;DirBuff_EntryCounter: resw 1
   118                              <1> 
   119                              <1> ; 01/02/2016
   120                              <1> ; these are on (real mode) segment 8000h and later
   121                              <1> ; FAT_Buffer:	resb 1536 ; 3 sectors
   122                              <1> ; Dir_Buffer:	resb 512*32
   123                              <1> ; Logical_DOSDisks:  resb 6656 ; 26 * 256 bytes
   124                              <1> 
   125                              <1> ; 18/01/2016
   126                              <1> 
   127 00017F3C ????????            <1> FreeClusterCount: resd 1
   128                              <1> 
   129 00017F40 ????????            <1> VolSize_Unit1:   resd 1
   130 00017F44 ????????            <1> VolSize_Unit2:   resd 1
   131                              <1> 
   132 00017F48 ????????            <1> Vol_Tot_Sec_Str_Start:	    resd 1
   133 00017F4C <res Ah>            <1> Vol_Tot_Sec_Str: 	    resb 10
   134 00017F56 ??                  <1> Vol_Tot_Sec_Str_End:	    resb 1
   135 00017F57 ??                  <1> resb 1
   136 00017F58 ????????            <1> Vol_Free_Sectors_Str_Start: resd 1
   137 00017F5C <res Ah>            <1> Vol_Free_Sectors_Str:	    resb 10				
   138 00017F66 ??                  <1> Vol_Free_Sectors_Str_End:   resb 1
   139                              <1> 
   140                              <1> ; 10/02/2016
   141 00017F67 ??                  <1> RUN_CDRV: resb 1 ; CMD_INTR.ASM  ; 09/11/2011
   142                              <1> 
   143                              <1> ; 24/01/2016
   144 00017F68 <res 80h>           <1> PATH_Array:     resb 128 ; DIR.ASM ; 09/10/2011
   145                              <1> ; 06/02/2016
   146 00017FE8 ????????            <1> CCD_DriveDT:	resd 1 ; DIR.ASM ; (word)
   147 00017FEC ??                  <1> CCD_Level:	resb 1 ; DIR.ASM
   148 00017FED ??                  <1> Last_Dir_Level:	resb 1 ; DIR.ASM
   149                              <1> ;
   150 00017FEE ????                <1> CDLF_AttributesMask: resw 1 ; DIR.ASM
   151 00017FF0 ????????            <1> CDLF_FNAddress:	resd 1 ; DIR.ASM (word)
   152 00017FF4 ????                <1> CDLF_DEType:	resw 1 ; DIR.ASM
   153                              <1> ;
   154 00017FF6 ??                  <1> CD_COMMAND:	resb 1 ; DIR.ASM
   155                              <1> 
   156 00017FF7 ??                  <1> alignb 4
   157                              <1> 
   158                              <1> ; 29/01/2016
   159 00017FF8 ??                  <1> Program_Exit:	resb 1 ; CMD_INTR.ASM  ; 09/11/2011
   160                              <1> 
   161                              <1> ;alignb 4
   162                              <1> ; 23/02/2016
   163 00017FF9 ??                  <1> disk_rw_op:	resb 1 ; 0 = disk read, 1 = disk write
   164                              <1> ;disk_rw_spt:	resb 1 ; sectors per track (<= 63) /// (<256)
   165                              <1> ; 31/01/2016
   166 00017FFA ??                  <1> retry_count: 	resb 1 ; DISK_IO.ASM ; 20/07/2011 (CHS_RetryCount)
   167 00017FFB ??                  <1> disk_rw_err: 	resb 1 ; DISK_IO.ASM ; (Disk_IO_err_code)
   168 00017FFC ????????            <1> sector_count:	resd 1 ; DISK_IO.ASM ; (Disk_RW_SectorCount)
   169                              <1> 
   170                              <1> ; 06/02/2016 (long name)
   171 00018000 ????                <1> FDE_AttrMask:	   resw 1 ; DIR.ASM
   172 00018002 ????                <1> AmbiguousFileName: resw 1 ; DIR.ASM
   173 00018004 ??                  <1> PreviousAttr:	   resb 1 ; DIR.ASM
   174                              <1> ;	
   175 00018005 ??                  <1> LongNameFound:   resb 1	  ; DIR.ASM
   176 00018006 ??                  <1> LFN_EntryLength: resb 1   ; DIR.ASM
   177 00018007 ??                  <1> LFN_CheckSum:    resb 1   ; DIR.ASM
   178 00018008 <res 84h>           <1> LongFileName:    resb 132 ; DIR.ASM
   179                              <1> 
   180                              <1> ;PATH_Array_Ptr: resw 1 ; DIR.ASM
   181 0001808C ??                  <1> PATH_CDLevel:	 resb 1 ; DIR.ASM
   182 0001808D ??                  <1> PATH_Level:	 resb 1 ; DIR.ASM
   183                              <1> 
   184                              <1> ; 07/02/2016
   185 0001808E <res Dh>            <1> Dir_File_Name:	resb 13 ; DIR.ASM ; 09/10/2011
   186                              <1> 
   187                              <1> ; 10/02/2016
   188 0001809B <res Dh>            <1> Dir_Entry_Name:	resb 13 ; DIR.ASM
   189                              <1> 
   190                              <1> alignb 2
   191                              <1> 
   192 000180A8 ????                <1> AttributesMask: resw 1 ; CMD_INTR.ASM ; 09/11/2011
   193                              <1> 
   194                              <1> ; 10/02/2016 (128 bytes -> 126 bytes)
   195                              <1> ; 08/02/2016
   196                              <1> ;FFF Structure (128 bytes) ; DIR.ASM ; 09/10/2011
   197 000180AA ??                  <1> FindFile_Drv:		  resb 1
   198 000180AB <res 41h>           <1> FindFile_Directory:	  resb 65
   199 000180EC <res Dh>            <1> FindFile_Name:		  resb 13
   200                              <1> FindFile_LongNameEntryLength:
   201 000180F9 ??                  <1> FindFile_LongNameYes: 	  resb 1 ; Sign for longname procedures
   202                              <1> ;Above 80 bytes form
   203                              <1> ;TR-DOS Source/Destination File FullName Format/Structure
   204 000180FA ????                <1> FindFile_AttributesMask:  resw 1
   205 000180FC <res 20h>           <1> FindFile_DirEntry:	  resb 32
   206 0001811C ????????            <1> FindFile_DirFirstCluster: resd 1
   207 00018120 ????????            <1> FindFile_DirCluster:	  resd 1
   208 00018124 ????                <1> FindFile_DirEntryNumber:  resw 1
   209 00018126 ????                <1> FindFile_MatchCounter:	  resw 1
   210 00018128 ????                <1> FindFile_Reserved:	  resw 1 ; 06/03/2016
   211                              <1> 
   212 0001812A ????????            <1> First_Path_Pos: resd 1	; DIR.ASM ; 09/10/2011
   213 0001812E ????????            <1> Last_Slash_Pos: resd 1	; DIR.ASM 
   214                              <1> 
   215                              <1> ; 10/02/2016
   216 00018132 ????                <1> File_Count:     resw 1 	; DIR.ASM ; 09/10/2011
   217 00018134 ????                <1> Dir_Count:      resw 1
   218 00018136 ????????            <1> Total_FSize:    resd 1
   219 0001813A ????????            <1> TFS_Dec_Begin:  resd 1
   220 0001813E <res Ah>            <1>                 resb 10
   221 00018148 ??                  <1> TFS_Dec_End:    resb 1
   222                              <1> 
   223 00018149 ??                  <1> PrintDir_RowCounter: resb 1
   224                              <1> 
   225 0001814A ????                <1> alignb 4
   226                              <1> ; 15/02/2015 ('show' command variables)
   227 0001814C ????????            <1> Show_FDT:	resd 1
   228 00018150 ????????            <1> Show_LDDDT:	resd 1
   229 00018154 ????????            <1> Show_Cluster:	resd 1
   230 00018158 ????????            <1> Show_FileSize:	resd 1
   231 0001815C ????????            <1> Show_FilePointer: resd 1
   232 00018160 ????                <1> Show_ClusterPointer: resw 1
   233 00018162 ????                <1> Show_ClusterSize: resw 1
   234 00018164 ??                  <1> Show_RowCount:	resb 1
   235                              <1> 
   236 00018165 ??????              <1> alignb 4
   237                              <1> ; 21/02/2016
   238 00018168 ????????            <1> DelFile_FNPointer:	resd 1 ; ; CMD_INTR.ASM (word) ; 09/11/2011
   239                              <1> ; 27/02/2016
   240                              <1> ; DIR.ASM (09/10/2011)
   241 0001816C ????????            <1> DelFile_FCluster:	resd 1
   242 00018170 ????                <1> DelFile_EntryCounter:	resw 1
   243 00018172 ??                  <1> DelFile_LNEL:		resb 1
   244 00018173 ??                  <1> resb 1
   245                              <1> 
   246                              <1> ; DIR.ASM
   247 00018174 ????????            <1> mkdir_DirName_Offset: 	resd 1
   248 00018178 ????????            <1> mkdir_FFCluster:	resd 1
   249 0001817C ????????            <1> mkdir_LastDirCluster:	resd 1
   250 00018180 ????????            <1> mkdir_FreeSectors:	resd 1
   251 00018184 ????                <1> mkdir_attrib:		resw 1 
   252 00018186 ??                  <1> mkdir_SecPerClust:	resb 1
   253 00018187 ??                  <1> mkdir_add_new_cluster:	resb 1
   254 00018188 <res Dh>            <1> mkdir_Name:		resb 13
   255 00018195 ????                <1> resw 1 ; 01/03/2016
   256                              <1> ; 27/02/2016
   257 00018197 ??                  <1> RmDir_MultiClusters:	resb 1  
   258 00018198 ????????            <1> RmDir_DirEntryOffset:	resd 1 ; 01/03/2016 (word -> dword)
   259 0001819C ????????            <1> RmDir_ParentDirCluster: resd 1
   260 000181A0 ????????            <1> RmDir_DirLastCluster:   resd 1
   261 000181A4 ????????            <1> RmDir_PreviousCluster:  resd 1
   262                              <1> ; 22/02/2016
   263 000181A8 ??                  <1> UPDLMDT_CDirLevel:	resb 1
   264 000181A9 ????????            <1> UPDLMDT_CDirFCluster:	resd 1
   265                              <1> 	
   266 000181AD ??????              <1> alignb 4
   267                              <1> ; DRV_FAT.ASM ; 21/08/2011
   268 000181B0 ????????            <1> gffc_next_free_cluster:  resd 1
   269 000181B4 ????????            <1> gffc_first_free_cluster: resd 1
   270 000181B8 ????????            <1> gffc_last_free_cluster:  resd 1
   271                              <1> 
   272                              <1> ;29/04/2016
   273                              <1> Cluster_Index: ; resd 1
   274                              <1> ; 22/02/2016
   275 000181BC ????????            <1> ClusterValue:	resd 1
   276                              <1> ; 04/03/2016
   277 000181C0 ??                  <1> Attributes:	resb 1 
   278                              <1> ;;CFS_error:  resb 1 ;; 01/03/2016
   279 000181C1 ??                  <1> resb 1
   280 000181C2 ??                  <1> CFS_OPType: resb 1
   281 000181C3 ??                  <1> CFS_Drv:    resb 1
   282 000181C4 ????????            <1> CFS_CC:	    resd 1
   283 000181C8 ????????            <1> CFS_FAT32FSINFOSEC: resd 1
   284 000181CC ????????            <1> CFS_FAT32FC: resd 1
   285                              <1> 
   286                              <1> ; 27/02/2016
   287                              <1> ;alignb 4
   288 000181D0 ????????            <1> glc_prevcluster: resd 1 ; DRV_FAT.ASM (21/08/2011)
   289                              <1> ; 22/10/2016
   290 000181D4 ????????            <1> glc_index:	 resd 1 ;  Last Cluster Index (22/10/2016)	
   291                              <1> 
   292                              <1> ; DIR.ASM
   293 000181D8 ????                <1> DLN_EntryNumber: resw 1
   294 000181DA ??                  <1> DLN_40h:	 resb 1
   295                              <1> ; 28/02/2016
   296 000181DB ??                  <1> TCC_FATErr:	 resb 1 ; DRV_FAT.ASM
   297                              <1> 
   298                              <1> alignb 4
   299                              <1> ; DIR.ASM (09/10/2011)
   300 000181DC ????                <1> LCDE_EntryIndex: resw 1 ; LCDE_EntryOffset
   301 000181DE ????                <1> LCDE_ClusterSN:  resw 1
   302 000181E0 ????????            <1> LCDE_Cluster: 	 resd 1
   303 000181E4 ????????            <1> LCDE_ByteOffset: resd 1
   304                              <1> 
   305                              <1> ;alignb4
   306                              <1> ; 06/03/2016 (word -> dword)
   307                              <1> ; CMD_INTR.ASM (01/08/2010)
   308 000181E8 ????????            <1> SourceFilePath:	     resd 1
   309 000181EC ????????            <1> DestinationFilePath: resd 1
   310                              <1> 
   311                              <1> ;alignb 4
   312                              <1> ; 06/03/2016
   313                              <1> ; FILE.ASM (09/10/2011)
   314                              <1> ;Source File Structure (same with 'Find File' Structure)
   315 000181F0 ??                  <1> SourceFile_Drv:			resb 1
   316 000181F1 <res 41h>           <1> SourceFile_Directory:		resb 65
   317 00018232 <res Dh>            <1> SourceFile_Name:		resb 13
   318                              <1> SourceFile_LongNameEntryLength: 
   319 0001823F ??                  <1> SourceFile_LongNameYes:		resb 1 ; Sign for longname procedures
   320                              <1> ;Above 80 bytes
   321                              <1> ;is TR-DOS Source File FullName Format/Structure
   322 00018240 ????                <1> SourceFile_AttributesMask:	resw 1
   323 00018242 <res 20h>           <1> SourceFile_DirEntry:		resb 32
   324 00018262 ????????            <1> SourceFile_DirFirstCluster:	resd 1
   325 00018266 ????????            <1> SourceFile_DirCluster:		resd 1
   326 0001826A ????                <1> SourceFile_DirEntryNumber:	resw 1
   327 0001826C ????                <1> SourceFile_MatchCounter:	resw 1
   328                              <1> ; 16/03/2016
   329 0001826E ??                  <1> SourceFile_SecPerClust:		resb 1
   330 0001826F ??                  <1> SourceFile_Reserved:		resb 1
   331                              <1> ; Above is 128 bytes
   332                              <1> 
   333                              <1> ;Destination File Structure (same with 'Find File' Structure)
   334 00018270 ??                  <1> DestinationFile_Drv:		resb 1
   335 00018271 <res 41h>           <1> DestinationFile_Directory: 	resb 65
   336 000182B2 <res Dh>            <1> DestinationFile_Name:		resb 13
   337                              <1> DestinationFile_LongNameEntryLength:
   338 000182BF ??                  <1> DestinationFile_LongNameYes:	resb 1 ; Sign for longname procedures
   339                              <1> ;Above 80 bytes
   340                              <1> ;is TR-DOS Destination File FullName Format/Structure
   341 000182C0 ????                <1> DestinationFile_AttributesMask: resw 1
   342 000182C2 <res 20h>           <1> DestinationFile_DirEntry:	resb 32
   343 000182E2 ????????            <1> DestinationFile_DirFirstCluster: resd 1
   344 000182E6 ????????            <1> DestinationFile_DirCluster:	resd 1
   345 000182EA ????                <1> DestinationFile_DirEntryNumber: resw 1
   346 000182EC ????                <1> DestinationFile_MatchCounter:	resw 1
   347                              <1> ; 16/03/2016
   348 000182EE ??                  <1> DestinationFile_SecPerClust:	resb 1
   349 000182EF ??                  <1> DestinationFile_Reserved:	resb 1
   350                              <1> ; Above is 128 bytes
   351                              <1> 
   352                              <1> ; 24/04/2016
   353 000182F0 ????                <1> resw 1
   354                              <1> 
   355                              <1> ; 10/03/2016
   356                              <1> ; FILE.ASM
   357 000182F2 ??                  <1> move_cmd_phase:	   resb 1
   358 000182F3 ??                  <1> msftdf_sf_df_drv:  resb 1
   359 000182F4 ????????            <1> msftdf_drv_offset: resd 1
   360                              <1> 
   361                              <1> ; 11/03/2016
   362                              <1> ; DRV_FAT.ASM (21/08/2011)
   363 000182F8 ????????            <1> FAT_anc_LCluster:  resd 1
   364 000182FC ????????            <1> FAT_anc_FFCluster: resd 1
   365                              <1> 
   366                              <1> ;alignb 4
   367                              <1> 
   368                              <1> ; 14/03/2016
   369                              <1> ; TRDOS 386 = TRDOS v2.0 feature only !
   370                              <1> ; 'allocate_memory_block' in 'memory.s'
   371 00018300 ????????            <1> mem_ipg_count:	resd 1 ; page count (for contiguous allocation)
   372 00018304 ????????            <1> mem_pg_count:	resd 1 ; page count (for count down)
   373 00018308 ????????            <1> mem_aperture:	resd 1 ; contiguous free pages (current)
   374 0001830C ????????            <1> mem_max_aperture: resd 1 ; maximum value of contiguous free pages
   375 00018310 ????????            <1> mem_pg_pos:	resd 1 ; mem. position (page #) of current aperture
   376 00018314 ????????            <1> mem_max_pg_pos: resd 1 ; mem. position (page #) of max. aperture
   377                              <1> 
   378                              <1> ; 15/03/2016
   379                              <1> ; FILE.ASM ('copy_source_file_to_destination_file')
   380 00018318 ??                  <1> copy_cmd_phase:       resb 1
   381 00018319 ??                  <1> csftdf_rw_err:	      resb 1
   382 0001831A ??                  <1> DestinationFileFound: resb 1
   383 0001831B ??                  <1> csftdf_cdrv: 	      resb 1
   384 0001831C ????????            <1> csftdf_filesize:      resd 1
   385                              <1> ; TRDOS386 (TRDOS v2.0)
   386 00018320 ????????            <1> csftdf_sf_mem_addr:   resd 1
   387 00018324 ????????            <1> csftdf_sf_mem_bsize:  resd 1
   388                              <1> ;
   389                              <1> 
   390 00018328 ????????            <1> csftdf_sf_cluster:    resd 1 ; 16/03/2016
   391 0001832C ????????            <1> csftdf_df_cluster:    resd 1
   392                              <1> ; 16/03/2016
   393 00018330 ????????            <1> csftdf_r_size:        resd 1
   394 00018334 ????????            <1> csftdf_w_size:        resd 1
   395 00018338 ????????            <1> csftdf_sf_rbytes:     resd 1
   396 0001833C ????????            <1> csftdf_df_wbytes:     resd 1
   397 00018340 ??                  <1> csftdf_percentage:    resb 1
   398                              <1> ; 17/03/2016
   399 00018341 ??                  <1> csftdf_videopage:     resb 1
   400 00018342 ????                <1> csftdf_cursorpos:     resw 1
   401 00018344 ????????            <1> csftdf_sf_drv_dt:     resd 1
   402 00018348 ????????            <1> csftdf_df_drv_dt:     resd 1
   403                              <1> 
   404                              <1> ; 21/03/2016
   405                              <1> ; 20/03/2016
   406                              <1> ; FILE.ASM
   407 0001834C ????????            <1> createfile_Name_Offset:  resd 1
   408 00018350 ????????            <1> createfile_FreeSectors:  resd 1 
   409 00018354 ????????            <1> createfile_size:         resd 1
   410 00018358 ????????            <1> createfile_FFCluster:    resd 1 ; 11/03/2016
   411 0001835C ????????            <1> createfile_LastDirCluster: resd 1
   412 00018360 ????????            <1> createfile_Cluster:      resd 1
   413 00018364 ????????            <1> createfile_PCluster:     resd 1
   414 00018368 ??                  <1> createfile_attrib:	 resb 1
   415 00018369 ??                  <1> createfile_SecPerClust:  resb 1
   416 0001836A ????                <1> createfile_DirIndex:     resw 1
   417 0001836C ????????            <1> createfile_CCount:	 resd 1
   418 00018370 ????                <1> createfile_BytesPerSec:	 resw 1 ; 23/03/2016
   419 00018372 ??                  <1> createfile_wfc:	         resb 1
   420 00018373 ??                  <1> createfile_UpdatePDir:	 resb 1 ; 31/03/2016
   421                              <1> 
   422                              <1> ;alignb 4
   423                              <1> 
   424                              <1> ; 11/04/2016
   425 00018374 ????                <1> env_var_length:	resw 1
   426                              <1> 
   427 00018376 ????                <1> alignb 4
   428                              <1> 
   429                              <1> ; 25/04/2016
   430 00018378 ??                  <1> readi.valid:	resb 1 ; valid data (>0 = valid for readi)
   431 00018379 ??                  <1> readi.drv:	resb 1 ; drive number (0, 1,2,3,4..)
   432 0001837A ??                  <1> readi.spc:	resb 1 ; sectors per cluster for 'readi' drive
   433 0001837B ??                  <1> readi.s_index:  resb 1 ; sector index in current cluster (buffer)
   434 0001837C ????????            <1> readi.sector:	resd 1 ; current disk sector
   435 00018380 ????                <1> readi.bpc:	resw 1 ; bytes per cluster - 1
   436 00018382 ????                <1> readi.offset:	resw 1 ; byte offset in cluster buffer
   437 00018384 ????????            <1> readi.cluster:  resd 1 ; current cluster number
   438 00018388 ????????            <1> readi.c_index:	resd 1 ; cluster index of the current cluster (0,1,2,3..)
   439 0001838C ????????            <1> readi.fclust:	resd 1 ; first cluster of the current cluster
   440 00018390 ????????            <1> readi.fs_index: resd 1 ; sector index in disk/file section (for Singlix FS)
   441                              <1> ;readi.buffer:	resd 1 ; readi sector buffer address
   442                              <1> 
   443                              <1> ;alignb 4
   444                              <1> 
   445 00018394 ??                  <1> writei.valid:	resb 1 ; valid data (>0 = valid for writei)
   446 00018395 ??                  <1> writei.drv:	resb 1 ; drive number (0, 1,2,3,4..)
   447 00018396 ??                  <1> writei.spc:	resb 1 ; sectors per cluster for 'writei' drive
   448 00018397 ??                  <1> writei.s_index: resb 1 ; sector index in current cluster (buffer)
   449 00018398 ????????            <1> writei.sector:	resd 1 ; current disk sector
   450 0001839C ????                <1> writei.bpc:	resw 1 ; bytes per cluster - 1
   451 0001839E ????                <1> writei.offset:	resw 1 ; byte offset in cluster buffer
   452 000183A0 ????????            <1> writei.cluster: resd 1 ; current cluster number
   453 000183A4 ????????            <1> writei.c_index:	resd 1 ; cluster index of the current cluster (0,1,2,3..)
   454 000183A8 ????????            <1> writei.fclust:  resd 1 ; first cluster of the current cluster
   455 000183AC ????????            <1> writei.fs_index: resd 1 ; sector index in disk/file section (for Singlix FS)
   456                              <1> ;writei.buffer:	resd 1 ; writei sector buffer address
   457 000183B0 ????????            <1> writei.lclust:	resd 1 ; writei last cluster (mget_w) ; 23/10/2016
   458 000183B4 ????????            <1> writei.l_index:	resd 1 ; writei last cluster index (mget_w) ; 23/10/2016
   459 000183B8 ??                  <1> writei.ofn:	resb 1 ; open file number (to be written) ; 23/10/2016
   460                              <1> 
   461 000183B9 ??????              <1> alignb 4
   462                              <1> 
   463                              <1> ; 29/04/2016
   464 000183BC ????????            <1> Run_CDirFC:	resd 1
   465 000183C0 ??                  <1> Run_Auto_Path:	resb 1
   466 000183C1 ??                  <1> Run_Manual_Path: resb 1 ; 0 -> auto path sequence needed
   467 000183C2 ??                  <1> EXE_ID:		resb 1	
   468 000183C3 ??                  <1> EXE_dot:	resb 1
   469                              <1> 
   470                              <1> ; 06/05/2016
   471 000183C4 ????????            <1> mainprog_return_addr: resd 1
   472 000183C8 ????????            <1> last_error:	resd 1  ; this will be used to return error code to MainProg
   473                              <1> 			; 'lasterror' keyword will be used later to get the
   474                              <1> 			; last error code/number/status.
   475                              <1> ; 12/05/2016
   476 000183CC ????????            <1> video_eax:	resd 1  ; eax return value of video function
   477                              <1> 
   478                              <1> ; 01/06/2016
   479 000183D0 ????????            <1> user_buffer:	resd 1  ; 'diskio.s' (INT 33h, Function 08h, floppy disk type)
   480                              <1> 
   481                              <1> ; 21/05/2016 - TRDOS 386 ('swap/switch', 'rswap', [u.pri])
   482 000183D4 ??                  <1> priority:	resb 1  ; running priority level of process (0,1,2)
   483                              <1> 			; (run queue which is process comes from)
   484                              <1> ; 22/05/2016 - TRDOS 386 ('set_run_sequence', 'rtc_int', 'u_timer')
   485 000183D5 ??                  <1> p_change:	resb 1  ; process change status (for timer events)
   486                              <1> ; 23/05/2016 - TRDOS 386 ('clock')
   487 000183D6 ??                  <1> multi_tasking:	resb 1   ; Multi Tasking status (0 = disabled, >0 = enabled)
   488                              <1> 			; (EBX will return with user buffer addr or disk type)
   489                              <1> ; 07/06/2016
   490 000183D7 ??                  <1> timer_events:	resb 1  ; number of (active) timer events, <= 16		
   491                              <1> 
   492                              <1> ; 24/06/2016
   493 000183D8 ??                  <1> w_str_cmd:	resb 1	; WRITE_STRING command (0,1,2,3) ; video.s
   494 000183D9 ??                  <1> p_crt_mode:	resb 1  ; previous video mode (=3 or 0), backup mark/sign
   495                              <1> ; 26/06/2016
   496 000183DA ??                  <1> p_crt_page:	resb 1  ; previous active page (for 'set_mode')
   497                              <1> ; 04/07/2016
   498 000183DB ??                  <1> noclearmem:	resb 1  ; if set, 'SET MODE' (INT 31h) function (AH = 4)
   499                              <1> 			; will not clear the video memory
   500                              <1> 			; (usable for graphics modes only)
   501                              <1> alignb 2
   502 000183DC ????                <1> CRT_LEN:	resw 1  ; length of regen buffer in bytes
   503 000183DE <res 10h>           <1> cursor_pposn:	resw 8  ; cursor positions backup
   504                              <1> 
   505                              <1> ; 10/07/2016 ('VGA_FONT_SETUP', INT 43H address for x86 real mode bios)
   506 000183EE ????????            <1> VGA_INT43H:	resd 1	; 0 = default (not configured by user)
   507                              <1> 			; 0FFFFFFFFh = user defined fonts
   508                              <1> 			; address:
   509                              <1> 			; 	vgafont8
   510                              <1> 			; 	vgafont16
   511                              <1> 			; 	vgafont14
   512                              <1> 
   513                              <1> ; 25/07/2016
   514 000183F2 ??                  <1> VGA_MTYPE:	resb 1  ; 0=CTEXT,1=MTEXT,2=CGA,3=PLANAR1,4=PLANAR4,5=LINEAR 
   515                              <1> 
   516                              <1> ; 23/10/2016
   517 000183F3 ??                  <1> setfmod		resb 1	; update last modification date&time sign (if >0)
   518                              <1> 			; (it is Open File Number + 1, if > 0)
   519                              <1> alignb 4
   520                              <1> 
   521                              <1> ; 16/10/2016
   522 000183F4 ????????            <1> FFF_UBuffer:	resd 1  ; User's buffer address for FFF & FNF system calls 
   523                              <1> ; 15/10/2016
   524 000183F8 ??                  <1> FFF_Valid:	resb 1  ; Find First File Structure validation byte
   525                              <1> 			; 0  = invalid (Find Next File can't use FFF struct)
   526                              <1> 			; >0 = valid, return type for FFF and Find Next File
   527                              <1> 			; 24 = basic parameters, 24 bytes
   528                              <1> 			; 128 = entire FFF structure/table, 128 bytes
   529                              <1> ; 16/10/2016 (FFF_Attrib: resw 1)
   530 000183F9 ??                  <1> FFF_Attrib:	resb 1	; Find First File attributes for Find Next File (LB)
   531 000183FA ??                  <1> FFF_RType:	resb 1  ; FFF return type (0 = Basic, >0 = complete) (HB)
   532                              <1> ; 16/10/2016 - 05/10/2016 (Set Working Path)
   533 000183FB ??                  <1> SWP_inv_fname:	resb 1	; Set Working Path - Invalid File Name
   534 000183FC ????                <1> SWP_Mode:	resw 1	; Set Working Path - Mode
   535 000183FE ??                  <1> SWP_DRV:	resb 1	; Set Working Path - Drive	
   536 000183FF ??                  <1> SWP_DRV_chg:	resb 1	; Set Working Path - Drive Change
   537                              <1> 
   538                              <1> ; 27/02/2017
   539 00018400 ??                  <1> fpready:	resb 1	; '80387 fpu is ready' flag	
   540                              <1> 
   541                              <1> ; 17/04/2021
   542                              <1> ; (DEVICE parameters is disabled as temporary)
   543                              <1> 
   544                              <1> ; 08/10/2016
   545                              <1> ;device_name:	resb 9  ; capitalized (and zero padded) device name
   546                              <1> 			; (example: "TTY0",0,0,0,0,0")
   547                              <1> 
   548 00018401 ??????              <1> alignb 4
   549                              <1> 
   550                              <1> ; 08/10/2016
   551                              <1> ; 07/10/2016
   552                              <1> ; Table of kernel devices (which do not use installable device drivers)
   553                              <1> ; has been coded into KERNEL (trdosk9.s) 
   554                              <1> ; 07/10/2016
   555                              <1> ; 8 installable device drivers available to install (NUMIDEV)
   556                              <1> ;IDEV_PGDIR: resd NUMIDEV
   557                              <1> 			; Page directories of installable device drivers
   558                              <1> 			;
   559                              <1> 			; Note: Virtual start address is always 400000h
   560                              <1> 			; (end of the 1st 4MB). [org 400000h]
   561                              <1> 			; Segments: KCODE, KDATA
   562                              <1> 			; Method: call 400000h (after changing page dir) 	
   563                              <1> 			; Query code located at the start (400000h).
   564                              <1> 			; Query code returns with
   565                              <1> 			;   eax = device type and driver version
   566                              <1> 			;         AL = Device Type minor
   567                              <1> 			;         AH = Device Type major
   568                              <1> 			;         Byte 16-23 : Version minor
   569                              <1> 			;	  Byte 24-31 : Version major - 1
   570                              <1> 			;		       (0:0 -> 1.0)
   571                              <1> 			;   ebx = initialization code address
   572                              <1> 			;   ecx = configuration table address
   573                              <1> 			;   edx = description table address
   574                              <1> 			;   esi = device (default) name address (ASCIIZ)
   575                              <1> 			;	 (name has "/DEV/" prefix)		
   576                              <1> 			;   edi = dispatch table address
   577                              <1> 			;        (for calling kernel-device functions)
   578                              <1> 			;   ebp = address table address
   579                              <1> 			; Initialization code returns with
   580                              <1> 			;   eax = open code address
   581                              <1> 			;   ecx = close code address 
   582                              <1> 			;   ebx = read code address
   583                              <1> 			;   edx = write code address 	
   584                              <1> 			;   esi = IOCTL code address
   585                              <1> 			;   edi = dispatch table address
   586                              <1> 			;   ebp = address table address
   587                              <1> 			; Address Table:
   588                              <1> 			;    Offset 0  : open code address
   589                              <1> 			;    Offset 4  : read code address
   590                              <1> 			;    Offset 8  : write code address
   591                              <1> 			;    Offset 12 : close code address
   592                              <1> 			;    Offset 16 : IOCTL code address
   593                              <1> 			;    Offset 20 : initialization code address
   594                              <1> 			;    Offset 24 : description table address
   595                              <1> 			;    Offset 28 : configuration table address
   596                              <1> 			;    Offset 32 : device name address
   597                              <1> 			;    Offset 36 : dispatch table address
   598                              <1> 			;          (for calling kernel-device functions)
   599                              <1> 
   600                              <1> ;IDEV_NAME:  resb 8*NUMIDEV 
   601                              <1> 			  ; 8 byte names of installable device drivers
   602                              <1> 
   603                              <1> ;IDEV_TYPE:  resb NUMIDEV ; Driver type of installable device drivers
   604                              <1> ;IDEV_FLAGS: resb NUMIDEV ; Device access parameters for installable
   605                              <1>                           ; device drivers (These values are set while
   606                              <1> 			  ; the device driver is being loaded.)
   607                              <1> ;IDEV_OADDR: resd NUMIDEV ; open function addr for installable dev driver
   608                              <1> ;IDEV_CADDR: resd NUMIDEV ; close function addr for installable dev driver
   609                              <1> ;IDEV_RADDR: resd NUMIDEV ; read function addr for installable dev driver
   610                              <1> ;IDEV_WADDR: resd NUMIDEV ; write function addr for installable dev driver
   611                              <1> 	
   612                              <1> ; 08/10/2016	
   613                              <1> ; 07/10/2016
   614                              <1> ; Device Open and Access parameters
   615                              <1> ;DEV_ACCESS:	resb NUMOFDEVICES    ; bit 0 = accessable by normal users
   616                              <1> 				     ; bit 1 = read access permission
   617                              <1> 				     ; bit 2 = write access permission
   618                              <1> 				     ; bit 3 = IOCTL permission to users
   619                              <1> 				     ; bit 4 = block device if it is set	
   620                              <1> 				     ; bit 5 = 16 bit or 1024 byte data
   621                              <1> 				     ; bit 6 = 32 bit or 2048 byte data
   622                              <1> 				     ; bit 7 = installable device driver
   623                              <1> ;DEV_R_OWNER:	resb NUMOFDEVICES    ; Reading owner no (u.uid) of devices		
   624                              <1> ;DEV_R_OPENCOUNT: resb NUMOFDEVICES  ; Reading open count 
   625                              <1> ;DEV_W_OWNER:	resb NUMOFDEVICES    ; Writing owner no (u.uid) of devices		
   626                              <1> ;DEV_W_OPENCOUNT: resb NUMOFDEVICES  ; Writing open count
   627                              <1> ;DEV_DRIVER:	resb NUMOFDEVICES    ; device driver number (1 to 7Fh)
   628                              <1> 				     ; *if bit 7 is set (80 to FFh)
   629                              <1> 				     ; *if it is installable device driver
   630                              <1> 				     ; *index (0 to 7Fh)
   631                              <1> 				     ; otherwise it is kernel device index
   632                              <1> ;DEV_OPENMODE:	resb NUMOFDEVICES    ; 1 = read mode
   633                              <1> 				     ; 2 = write mode
   634                              <1> 				     ; 3 = read & write 	  
   635                              <1> 				     ; 0 = not open (free)		
   636                              <1> ;DEV_NAME_PTR:	resd NUMOFDEVICES    ; pointers to name addresses of drivers
   637                              <1> 				     ; Address base: KDEV_NAME+		
   638                              <1> 				     ; or IDEV_NAME+
   639                              <1> ;DEV_R_POINTER:	resd NUMOFDEVICES    ; reading pointer, writing pointer	
   640                              <1> ;DEV_W_POINTER:	resd NUMOFDEVICES    ; sector number if block device
   641                              <1> 				     ; character offset if char device
   642                              <1> alignb 4
   643                              <1> 
   644                              <1> ; 06/10/2016
   645                              <1> ; Open File Parameters
   646 00018404 <res 80h>           <1> OF_FCLUSTER:	resd OPENFILES  ; First clusters of open files
   647 00018484 <res 20h>           <1> OF_DRIVE:	resb OPENFILES  ; Logical DOS drive numbers of open files 
   648 000184A4 <res 20h>           <1> OF_MODE:	resb OPENFILES  ; Open mode (1 = read, 2 = write, 3 = r&w) 
   649 000184C4 <res 20h>           <1> OF_STATUS:	resb OPENFILES  ; (bit 0 = read, bit 1 = write)
   650 000184E4 <res 20h>           <1> OF_OPENCOUNT:	resb OPENFILES  ; Open counts of open files
   651 00018504 <res 80h>           <1> OF_POINTER:	resd OPENFILES	; File seek/read/write pointer
   652 00018584 <res 80h>           <1> OF_SIZE:	resd OPENFILES	; File sizes of open files (in bytes)
   653 00018604 <res 80h>           <1> OF_DIRFCLUSTER:	resd OPENFILES  ; Directory First Clusters of open files
   654 00018684 <res 80h>           <1> OF_DIRCLUSTER:	resd OPENFILES  ; Directory (Entry) Clusters of open files
   655 00018704 <res 80h>           <1> OF_VOLUMEID:	resd OPENFILES  ; Vol ID for removable drives of open files
   656 00018784 <res 80h>           <1> OF_CCLUSTER:	resd OPENFILES  ; Current clusters of open files
   657 00018804 <res 80h>           <1> OF_CCINDEX:	resd OPENFILES  ; Cluster index numbers of current clusters
   658                              <1> ; 24/10/2016
   659 00018884 <res 40h>           <1> OF_DIRENTRY:	resw OPENFILES  ; Directory entry index no. in dir cluster 
   660                              <1> 				; Sector index = entry index / 16
   661                              <1> ;alignb 2
   662                              <1> 
   663                              <1> DTA:		;resd 24	; Find First File data transfer area
   664 000188C4 <res 18h>           <1> 		resb 24		; 29/07/2022		
   665                              <1> 
   666                              <1> ; 19/12/2016
   667 000188DC ??                  <1> tcallback:	resb 1		; Timer callback method flag for 'systimer'
   668 000188DD ??                  <1> trtc:		resb 1		; Timer interrupt type flag for 'systimer'
   669                              <1> ; 20/02/2017
   670 000188DE ??                  <1> no_page_swap:	resb 1		; Swap lock for Signal Response Byte pages 
   671                              <1> ;;15/01/2017
   672                              <1> ; 02/01/2017
   673                              <1> ;;intflg:	resb 1		; software interrupt in progress signal
   674                              <1> 				; (for timer interrupt)
   675 000188DF ??                  <1> alignb 4
   676                              <1> ; 13/04/2017
   677                              <1> ;DEV_INTR:	resb NUMOFDEVICES ; Device Interrupt (IRQ) number + 1	
   678                              <1> 				; (0= not available, 1= IRQ 0, 16= IRQ 15)
   679 000188E0 <res 40h>           <1> DEV_INT_HNDLR:	resd 16		; Device Interrupt Handler addr, if > 0 	
   680                              <1> 
   681                              <1> ;alignb 4
   682                              <1> 
   683                              <1> ; 26/02/2017 ; IRQ Callback parameters ('syscalbac')
   684                              <1> ;Index: ; 0 to 8
   685                              <1> ;	0 = IRQ3, 1 = IRQ4, 2 = IRQ5, 3 = IRQ7
   686                              <1> ;	4 = IRQ9, 5 = IRQ10, 6 = IRQ11, 7 = IRQ12, 8 = IRQ13  
   687 00018920 <res 9h>            <1> IRQ.owner:	resb 9		; owner, 0 = free, >0 = [u.uno]
   688 00018929 <res 9h>            <1> IRQ.dev:	resb 9		; 0 = default/kernel, >0 = device number
   689 00018932 <res 9h>            <1> IRQ.method:	resb 9 		; 0 = Signal Response Byte, 1 = Callback
   690 0001893B <res 9h>            <1> IRQ.srb:	resb 9 		; Signal Response/Return Byte value
   691 00018944 <res 24h>           <1> IRQ.addr:	resd 9		; Rignal Response Byte address (physical)
   692                              <1> 				; or Callback service address (virtual)
   693                              <1> ; 28/02/2017
   694 00018968 ????????            <1> IRQ_cr3:	resd 1		; for saving cr3 register in IRQ handler
   695 0001896C ??                  <1> IRQnum:		resb 1		; IRQ number for IRQ handler (trdosk8.s)
   696                              <1> 
   697                              <1> ; 10/04/2017
   698                              <1> ; 03/04/2017
   699                              <1> ; UNINITIALIZED AUDIO DATA
   700 0001896D ??????              <1> alignb 4
   701 00018970 ??                  <1> audio_pci:	resb 1
   702 00018971 ??                  <1> audio_device:	resb 1
   703                              <1> ;audio_mode:	resb 1
   704 00018972 ??                  <1> audio_intr:	resb 1
   705 00018973 ??                  <1> audio_busy:	resb 1  ; Busy flag for audio irq ; 21/04/2017
   706                              <1> ;audio_reserved: resb 1
   707                              <1> ; 20/11/2023
   708 00018974 ????                <1> NAMBAR:		resw 1	; Native Audio Mixer Base Address
   709                              <1> NABMBAR:	; 02/10/2023 (NABMBAR = audio_io_base)
   710 00018976 ????                <1> audio_io_base:	resw 1 	; Base I/O address of audio device
   711 00018978 ????????            <1> audio_dev_id:	resd 1	; BUS/DEV/FN ; 00000000BBBBBBBBDDDDDFFF00000000
   712 0001897C ????????            <1> audio_vendor:	resd 1
   713 00018980 ????????            <1> audio_stats_cmd: resd 1
   714                              <1> ;
   715 00018984 ????????            <1> audio_buffer:	resd 1	; virtual address of user's audio buffer
   716 00018988 ????????            <1> audio_p_buffer:	resd 1	; Physical address of user's audio buffer
   717 0001898C ????????            <1> audio_buff_size: resd 1 ; user's audio buffer size (half buffer size) 
   718 00018990 ????????            <1> audio_dma_buff: resd 1  ; dma buffer address
   719 00018994 ????????            <1> audio_dmabuff_size: resd 1 ; dma buffer size (2 * half buffer size)
   720 00018998 ??                  <1> audio_flag:	resb 1  ; dma buffer flag (1st half = 0, 2nd half = 1)
   721 00018999 ??                  <1> audio_user:	resb 1	; user number of the owner
   722 0001899A ??                  <1> audio_cb_mode:	resb 1	; 0 = signal response byte method
   723                              <1> 			; 1 = callback method
   724                              <1> 			; 2 = s.r.b. method with auto increment
   725 0001899B ??                  <1> audio_srb:	resb 1	; signal response byte value
   726 0001899C ????????            <1> audio_cb_addr:	resd 1  ; callback service address or s.r.b. address
   727                              <1> 			; (s.r.b. addr is physical, cbs addr is virtual)
   728                              <1> 
   729 000189A0 ??                  <1> audio_bps:	resb 1  ; selected mode: 8 bit, 16 bit
   730 000189A1 ??                  <1> audio_stmo:	resb 1	; selected mode: mono /stereo
   731 000189A2 ????                <1> audio_freq: 	resw 1	; sampling rate
   732                              <1> ; 20/11/2023
   733 000189A4 ??                  <1> VRA:		resb 1
   734 000189A5 ??                  <1> audio_mode:	resb 1
   735                              <1> 
   736                              <1> ; 21/04/2017
   737 000189A6 ??                  <1> audio_play_cmd: resb 1  ; Play/Stop command (1 = play, 0 = stop)
   738                              <1> ; 21/11/2023
   739                              <1> ;audio_civ: ; 28/05/2017 ; Current Buffer Index (AC'97)
   740 000189A7 ??                  <1> audio_flag_eol:	resb 1  ; End of Link status (vt8233, EOL/FLAG)
   741                              <1> 
   742                              <1> audio_master_volume:
   743 000189A8 ??                  <1> audio_master_volume_l: resb 1 ; sound volume (lineout) left channel
   744 000189A9 ??                  <1> audio_master_volume_r: resb 1 ; sound volume (lineout) right channel
   745                              <1> 
   746 000189AA ????                <1> alignb 4
   747                              <1> 
   748                              <1> ; 20/11/2023
   749                              <1> ; 28/05/2017
   750                              <1> ; AC'97 Audio Controller Base Adress Registers
   751                              <1> ;NAMBAR:	resw 1	; Native Audio Mixer Base Address
   752                              <1> ;NABMBAR:	resw 1	; Native Audio Bus Mastering Base Address
   753                              <1> 	
   754                              <1> ;alignb 4
   755                              <1> ; 21/04/2017
   756 000189AC <res 400h>          <1> audio_bdl_buff:	resd 32*8 ; VT8233 (AC97) BDL Buffer Size
   757                              <1> ; 12/05/2017
   758 00018DAC ????????            <1> base_addr:	resd 1	; 'direct_memory_access' (memory.s)
   759                              <1> 
   760                              <1> ; 28/08/2017
   761                              <1> ; 20/08/2017
   762 00018DB0 ??                  <1> 		resb 1  ;
   763 00018DB1 ??                  <1> dma_user:	resb 1	; user number for sysdma
   764 00018DB2 ??                  <1> dma_channel:	resb 1	; dma channel for sysdma
   765 00018DB3 ??                  <1> dma_mode:	resb 1  ; dma mode for sysdma	
   766 00018DB4 ????????            <1> dma_addr:	resd 1	; dma buffer physical addr for sysdma
   767 00018DB8 ????????            <1> dma_size:	resd 1  ; dma buffer size (in bytes) for sysdma
   768 00018DBC ????????            <1> dma_start:	resd 1  ; dma start address for sysdma
   769 00018DC0 ????????            <1> dma_count:	resd 1  ; dma count (in bytes) for sysdma 
   770                              <1> 
   771 00018DC4 <res 723Ch>         <1> alignb 65536
   772                              <1> ; 09/08/2017
   773                              <1> ; 12/05/2017
   774 00020000 <res 10000h>        <1> sb16_dma_buffer: resb 65536 ; DMA buffer for sb16 audio playing.
  3874                                  ; 24/01/2016
  3875                                  %include 'ubss.s'	; UNINITIALIZED KERNEL (USER) DATA
     1                              <1> ; ****************************************************************************
     2                              <1> ; TRDOS386.ASM (TRDOS 386 Kernel - v2.0.5) - UNINITIALIZED USER DATA : ubss.s
     3                              <1> ; ----------------------------------------------------------------------------
     4                              <1> ; Last Update: 07/08/2022  (Previous: 28/02/2017)
     5                              <1> ; ----------------------------------------------------------------------------
     6                              <1> ; Beginning: 24/01/2016
     7                              <1> ; ----------------------------------------------------------------------------
     8                              <1> ; Assembler: NASM version 2.15 (trdos386.s)
     9                              <1> ; ----------------------------------------------------------------------------
    10                              <1> ; Derived from 'Retro UNIX 386 Kernel - v0.2.1.0' source code by Erdogan Tan
    11                              <1> ; ux.s (04/12/2015)
    12                              <1> ; ****************************************************************************
    13                              <1> 
    14                              <1> ; Retro UNIX 386 v1 Kernel - ux.s
    15                              <1> ; Last Modification: 04/12/2015
    16                              <1> ;
    17                              <1> ; ///////// RETRO UNIX 386 V1 SYSTEM DEFINITIONS ///////////////
    18                              <1> ; (Modified from 
    19                              <1> ;	Retro UNIX 8086 v1 system definitions in 'UNIX.ASM', 01/09/2014)
    20                              <1> ; ((UNIX.ASM (RETRO UNIX 8086 V1 Kernel), 11/03/2013 - 01/09/2014))
    21                              <1> ; ----------------------------------------------------------------------------
    22                              <1> ; Derived from UNIX Operating System (v1.0 for PDP-11) 
    23                              <1> ; (Original) Source Code by Ken Thompson (1971-1972)
    24                              <1> ; <Bell Laboratories (17/3/1972)>
    25                              <1> ; <Preliminary Release of UNIX Implementation Document>
    26                              <1> ; (Section E10 (17/3/1972) - ux.s)
    27                              <1> ; ****************************************************************************
    28                              <1> ; Ref: Retro UNIX 386 v1.2 Kernel (v0.2.2.3) - ux.s - 15/07/2022
    29                              <1> 
    30                              <1> alignb 2
    31                              <1> 
    32                              <1> %if 0
    33                              <1> 
    34                              <1> inode:
    35                              <1> 	;; 11/03/2013. 
    36                              <1> 	;;Derived from UNIX v1 source code 'inode' structure (ux).
    37                              <1> 	;;i.
    38                              <1> 	;
    39                              <1> 	;i.flgs: resw 1
    40                              <1> 	;i.nlks: resb 1
    41                              <1> 	;i.uid:	 resb 1
    42                              <1>         ;i.size: resw 1 ; size
    43                              <1> 	;i.dskp: resw 8 ; 16 bytes
    44                              <1> 	;i.ctim: resd 1
    45                              <1> 	;i.mtim: resd 1
    46                              <1> 	;i.rsvd: resw 1 ; Reserved (ZERO/Undefined word for UNIX v1)
    47                              <1> 
    48                              <1> 	; 26/01/2020
    49                              <1> 	; Retro UNIX 386 v2.0 - Modified UNIX v7 inode model
    50                              <1> 	;	(15/09/2029 .. 18/12/2019)
    51                              <1> 
    52                              <1> 	i.flgs:   resw 1	; /* mode and type of file */
    53                              <1> 	i.nlks:	  resw 1	; /* number of links to file */
    54                              <1> 	i.uid:	  resw 1	; /* owner's user id */  - 0 to 65535 -
    55                              <1> 	i.gid:	  resb 1	; /* owner's group id */ - o to 255 -
    56                              <1> 	i.size_h: resb 1	; /* number of bytes in file */ ; byte 5
    57                              <1> 	i.size:	  resd 1 ; size	; /* number of bytes in file */
    58                              <1> 	i.dskp:	  resd 10 ; 40 bytes ; /* disk block addresses */
    59                              <1> 	i.atim:	  resd 1	; /* time last accessed */
    60                              <1> 	i.mtim:	  resd 1	; /* time last modified */
    61                              <1> 	i.ctim:	  resd 1	; /* time created */
    62                              <1> 
    63                              <1> I_SIZE	equ $ - inode
    64                              <1> 
    65                              <1> %endif 
    66                              <1> 
    67                              <1> process:
    68                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5 
    69                              <1> 	; 27/02/2022
    70                              <1> 	; 12/01/2022 - Retro UNIX 386 v1.2 
    71                              <1> 	; 19/12/2016
    72                              <1> 	; 21/05/2016
    73                              <1> 	; 19/05/2016 - TRDOS 386 (TRDOS v2.0)
    74                              <1> 	; 06/05/2015 - Retro UNIX 386 v1
    75                              <1> 	; 11/03/2013 - 05/02/2014 (Retro UNIX 8086 v1)
    76                              <1> 	;Derived from UNIX v1 source code 'proc' structure (ux).
    77                              <1> 	;p.
    78                              <1> 	
    79 00030000 <res 20h>           <1>         p.pid:   resw nproc
    80 00030020 <res 20h>           <1>         p.ppid:  resw nproc
    81                              <1> 	;p.break: resw nproc ; 12/01/2022 (p.break is not used)
    82 00030040 <res 10h>           <1>         p.ttyc:  resb nproc ; console tty in Retro UNIX 8086 v1.
    83                              <1> 	; 27/02/2022 (p.waitc is not used)
    84                              <1> 	;p.waitc: resb nproc ; waiting channel in Retro UNIX 8086 v1.
    85 00030050 <res 10h>           <1> 	p.link:	 resb nproc
    86 00030060 <res 10h>           <1> 	p.stat:	 resb nproc
    87                              <1> 
    88                              <1> 	; 06/05/2015 (Retro UNIX 386 v1 feature only !) 
    89 00030070 <res 40h>           <1> 	p.upage: resd nproc ; Physical address of the process's
    90                              <1> 			    ; 'user' structure
    91                              <1> 	; 21/05/2016	
    92                              <1> 	; 19/05/2016 (TRDOS 386 feature only!)
    93 000300B0 <res 10h>           <1> 	p.timer: resb nproc ; number of timer events of the processs
    94                              <1> 
    95                              <1> 	; 19/12/2016
    96 000300C0 <res 40h>           <1> 	p.tcb:	resd nproc ; timer callback service address (if > 0)
    97                              <1> 			  		 			 	  
    98                              <1> P_SIZE	equ $ - process
    99                              <1> 
   100                              <1> ; fsp table (original UNIX v1)
   101                              <1> ;
   102                              <1> ;Entry
   103                              <1> ;          15                                      0
   104                              <1> ;  1     |---|---------------------------------------|
   105                              <1> ;        |r/w|       i-number of open file           |
   106                              <1> ;        |---|---------------------------------------| 
   107                              <1> ;        |               device number               |
   108                              <1> ;        |-------------------------------------------|
   109                              <1> ;    (*) | offset pointer, i.e., r/w pointer to file |
   110                              <1> ;        |-------------------------------------------| 
   111                              <1> ;        |  flag that says    | number of processes  |
   112                              <1> ;        |   file deleted     | that have file open  |
   113                              <1> ;        |-------------------------------------------| 
   114                              <1> ;  2     |                                           |
   115                              <1> ;        |-------------------------------------------| 
   116                              <1> ;        |                                           |
   117                              <1> ;        |-------------------------------------------|
   118                              <1> ;        |                                           |
   119                              <1> ;        |-------------------------------------------|
   120                              <1> ;        |                                           |
   121                              <1> ;        |-------------------------------------------| 
   122                              <1> ;  3     |                                           | 
   123                              <1> ;        |                                           |  
   124                              <1> ;
   125                              <1> ; (*) Retro UNIX 386 v1 modification: 32 bit offset pointer 
   126                              <1> 
   127                              <1> ; 27/03/2020 - Retro UNIX 386 v2 - FSP (OPEN FILES) TABLE 
   128                              <1> 
   129                              <1> ;Entry
   130                              <1> ;         15                    7                   0
   131                              <1> ;  1     |-------------------------------------------|
   132                              <1> ;        |   	     i-number of open file           |
   133                              <1> ;        |-------------------------------------------| 
   134                              <1> ;        |        high word of 32 bit i-number       |
   135                              <1> ;        |-------------------------------------------|
   136                              <1> ;        | open mode & status  |   device number     |
   137                              <1> ;        |-------------------------------------------|
   138                              <1> ;        |    reserved byte    |     open count      |
   139                              <1> ;        |-------------------------------------------| 
   140                              <1> ;        | offset pointer, i.e., r/w pointer to file |
   141                              <1> ;        |-------------------------------------------|
   142                              <1> ;        |   64 bit file offset pointer (bit 16-31)  | 
   143                              <1> ;        |-------------------------------------------|
   144                              <1> ;        |   64 bit file offset pointer (bit 32-47)  | 
   145                              <1> ;        |-------------------------------------------|
   146                              <1> ;        |   64 bit file offset pointer (bit 48-63)  | 
   147                              <1> ;        |-------------------------------------------|
   148                              <1> ;  2     |                                           |
   149                              <1> ;        |-------------------------------------------| 
   150                              <1> ;        |                                           |
   151                              <1> ;        |-------------------------------------------|
   152                              <1> ;        |                                           |
   153                              <1> ;        |-------------------------------------------|
   154                              <1> ;        |                                           |
   155                              <1> ;        |-------------------------------------------| 
   156                              <1> ;        |                                           | 
   157                              <1> 
   158                              <1> %if 0
   159                              <1> 
   160                              <1> ; (Retro UNIX 386 v1.2 - ux.s - 15/07/2022)
   161                              <1> ; 22/11/2021
   162                              <1> ; 21/07/2021 - Retro UNIX 386 v2 open file structure revision
   163                              <1> 
   164                              <1> struc file	; open files (fsp) structure ; (*)	
   165                              <1>   .inode:  resw 1  ; inode number of open file (32 bit)
   166                              <1>   .i32:	   resw 1  ; higher word of inode number (reserved)
   167                              <1>   .drive:  resb 1  ; logical drive (disk) number
   168                              <1>   .flags:  resb 1  ; open mode and status
   169                              <1>   .count:  resb 1  ; number of processes that have file open
   170                              <1>   ;.rsvd:  resb 1  ; reserved byte (for next versions)
   171                              <1>   .mnt:    resb 1  ; mnttab index+1 (0 = not mounted)
   172                              <1>   .offset: resd 1  ; file offset/pointer (64 bit) 
   173                              <1>   .o64:	   resd 1  ; higher 32 bit of file offset
   174                              <1>  .size:  ; = 16		
   175                              <1> endstruc 
   176                              <1> 
   177                              <1> %endif
   178                              <1> 
   179                              <1> ; 23/07/2022
   180                              <1> ;fsp:	resb nfiles * 16 ; (*)
   181                              <1> 
   182 00030100 ??                  <1> idev:	resb 1
   183 00030101 ??                  <1> cdev:	resb 1	
   184                              <1> 
   185                              <1> ; 15/04/2015
   186                              <1> ;fsp:	resb nfiles * 10 ; 11/05/2015 (8 -> 10)
   187                              <1> ;idev:	resw 1 ; device number is 1 byte in Retro UNIX 8086 v1 !
   188                              <1> ;cdev:	resw 1 ; device number is 1 byte in Retro UNIX 8086 v1 !
   189                              <1> 
   190                              <1> ; 18/05/2015
   191                              <1> ; 26/04/2013 device/drive parameters (Retro UNIX 8086 v1 feature only!)
   192                              <1> ; 'UNIX' device numbers (as in 'cdev' and 'u.cdrv')
   193                              <1> ;	0 -> root device (which has Retro UNIX 8086 v1 file system)
   194                              <1> ; 	1 -> mounted device (which has Retro UNIX 8086 v1 file system)
   195                              <1> ; 'Retro UNIX 8086 v1' device numbers: (for disk I/O procedures)
   196                              <1> ;	0 -> fd0 (physical drive, floppy disk 1), physical drive number = 0
   197                              <1> ;	1 -> fd1 (physical drive, floppy disk 2), physical drive number = 1
   198                              <1> ;	2 -> hd0 (physical drive, hard disk 1), physical drive number = 80h
   199                              <1> ;	3 -> hd1 (physical drive, hard disk 2), physical drive number = 81h
   200                              <1> ;	4 -> hd2 (physical drive, hard disk 3), physical drive number = 82h
   201                              <1> ;	5 -> hd3 (physical drive, hard disk 4), physical drive number = 83h
   202                              <1> 
   203 00030102 ??                  <1> rdev:	resb 1 ; root device number ; Retro UNIX 8086 v1 feature only!
   204                              <1> 	        ; as above, for physical drives numbers in following table
   205 00030103 ??                  <1> mdev:	resb 1 ; mounted device number ; Retro UNIX 8086 v1 feature only!
   206                              <1> 
   207                              <1> ; 23/07/2022
   208                              <1> ;; 15/04/2015
   209                              <1> ;active: resb 1 
   210                              <1> ;	 resb 1 ; 09/06/2015
   211                              <1> 
   212                              <1> ; 23/07/2022
   213                              <1> ;mnti:	 resw 1
   214                              <1> ; 07/08/2022
   215 00030104 ????                <1> mpid:	 resw 1
   216                              <1> ;rootdir: resw 1
   217 00030106 ????????            <1> rootdir: resd 1	
   218                              <1> 
   219                              <1> ; 21/05/2016 - TRDOS 386 (TRDOS v2.0) - priority levels, 3 run queues 
   220                              <1> runq:
   221 0003010A ????                <1> runq_event:	 resw 1 ; high priority, 'run for event'            ; 2
   222 0003010C ????                <1> runq_normal:	 resw 1 ; normal/regular priority, 'run as reqular' ; 1
   223 0003010E ????                <1> runq_background: resw 1 ; low priority, 'run on background'         ; 0
   224                              <1> ;
   225                              <1> ; 23/07/2022
   226                              <1> ;imod:	resb 1
   227                              <1> ;smod:	resb 1
   228                              <1> ;mmod:	resb 1
   229 00030110 ??                  <1> sysflg:	resb 1
   230 00030111 ??                  <1> 	resb 1	
   231                              <1> 
   232 00030112 ????                <1> alignb 4
   233                              <1> 
   234                              <1> user:
   235                              <1> 	; 23/07/2022 - TRDOS 386 Kernel v2.0.5
   236                              <1> 	; 04/12/2021 - Retro UNIX 386 v1.2
   237                              <1> 	; 13/01/2017
   238                              <1> 	; 19/12/2016
   239                              <1> 	; 21/05/2016 - TRDOS 386 (TRDOS v2.0) 
   240                              <1> 	; 	       [u.pri] usage method modification
   241                              <1> 	; 04/12/2015 
   242                              <1> 	; 18/10/2015
   243                              <1> 	; 12/10/2015
   244                              <1> 	; 21/09/2015
   245                              <1> 	; 24/07/2015
   246                              <1> 	; 16/06/2015
   247                              <1> 	; 09/06/2015
   248                              <1> 	; 11/05/2015
   249                              <1> 	; 16/04/2015 (Retro UNIX 386 v1 - 32 bit modifications)
   250                              <1> 	; 10/10/2013
   251                              <1> 	; 11/03/2013. 
   252                              <1> 	;Derived from UNIX v1 source code 'user' structure (ux).
   253                              <1> 	;u.
   254                              <1> 
   255 00030114 ????????            <1> 	u.sp:	  resd 1 ; esp (kernel stack at the beginning of 'sysent')
   256 00030118 ????????            <1> 	u.usp:	  resd 1 ; esp (kernel stack points to user's registers)
   257 0003011C ????????            <1> 	u.r0:	  resd 1 ; eax
   258 00030120 ????                <1> 	u.cdir:	  resw 1
   259 00030122 ????                <1> 		  resw 1 ; 23/07/2022
   260 00030124 ??                  <1> 	u.cdrv:	  resb 1 ; 23/07/2022
   261 00030125 ??                  <1> 		  resb 1				  	
   262 00030126 <res Ah>            <1> 	u.fp:	  resb 10
   263                              <1> 	;u.fp:	  resb OPENFILES ; 23/07/202
   264                              <1> 	u.fsp:	  ; 23/07/2022
   265 00030130 ????????            <1> 	u.fofp:	  resd 1
   266 00030134 ????????            <1> 	u.dirp:	  resd 1
   267 00030138 ????????            <1> 	u.namep:  resd 1
   268 0003013C ????????            <1> 	u.off:	  resd 1
   269                              <1> 	;	  resd 1 ; 23/07/2022 (64 bit fptr)
   270 00030140 ????????            <1> 	u.base:	  resd 1
   271 00030144 ????????            <1> 	u.count:  resd 1
   272 00030148 ????????            <1> 	u.nread:  resd 1
   273 0003014C ????????            <1> 	u.break:  resd 1 ; break
   274                              <1> 	; 10/01/2017 (TRDOS 386, relocation and dword alignment)
   275                              <1> 	; tty number (rtty, rcvt, wtty)
   276 00030150 ????                <1> 	u.ttyp:	  resw 1 
   277 00030152 ??                  <1> 	u.ttyn:	  resb 1 ; 28/07/2013 - Retro Unix 8086 v1 feature only !
   278 00030153 ??                  <1> 	u.mode:   resb 1 ; 23/07/2022
   279                              <1> 	;u.resb:  resb 1 ; 10/01/2017 (TRDOS 386, temporary)
   280 00030154 <res 10h>           <1> 	u.dirbuf: resb 16 ; 04/12/2015 (10 -> 16) 
   281                              <1> 	;u.pri:	  resw 1 ; 14/02/2014
   282 00030164 ??                  <1> 	u.quant:  resb 1 ; Retro UNIX 8086 v1 Feature only ! (uquant)
   283 00030165 ??                  <1> 		  resb 1 ; 23/07/2022
   284 00030166 ??                  <1> 	u.pri:	  resb 1 ; Modification: 21/05/2016 (priority levels: 0, 1, 2)
   285 00030167 ??                  <1> 		  resb 1 ; 23/07/2022	
   286 00030168 ????                <1> 	u.intr:	  resw 1
   287 0003016A ????                <1> 	u.quit:	  resw 1
   288                              <1> 	;u.emt:	  resw 1 ; 10/10/2013
   289                              <1> 	;u.ilgins: resw 1 ; 10/01/2017
   290                              <1> 	;u.cdrv:  resw 1 ; cdev
   291 0003016C ??                  <1> 	u.bsys:	  resb 1
   292 0003016D ??                  <1> 	u.uno:	  resb 1
   293                              <1> 	; 23/07/2022
   294                              <1> 	;u.uid:	  resw 1 ; uid	; 27/03/2021 - Retro UNIX 386 v2
   295                              <1> 	;u.ruid:  resw 1	; 16 bit uid
   296                              <1> 	;u.gid:	  resb 1 ; gid 	; 27/03/2021 - Retro UNIX 386 v2
   297                              <1> 	;u.rgid:  resb 1
   298                              <1> 	; 23/07/2022
   299                              <1> 	;u.procp: resd 1 ; /* pointer to proc structure */
   300 0003016E ??                  <1> 	u.uid:	  resb 1 ; uid
   301 0003016F ??                  <1> 	u.ruid:   resb 1
   302 00030170 ????????            <1>         u.upage:  resd 1 ; 16/04/2015 - Retro Unix 386 v1 feature only !
   303 00030174 ????????            <1> 	u.pgdir:  resd 1 ; 09/03/2015 (page dir addr of process)
   304 00030178 ????????            <1> 	u.ppgdir: resd 1 ; 06/05/2015 (page dir addr of the parent process)
   305 0003017C ????????            <1> 	u.pbase:  resd 1 ; 20/05/2015 (physical base/transfer address)
   306 00030180 ????                <1> 	u.pcount: resw 1 ; 20/05/2015 (byte -transfer- count for page)
   307                              <1> 	;u.pncount: resw 1 
   308                              <1> 		; 16/06/2015 (byte -transfer- count for page, 'namei', 'mkdir')
   309                              <1> 	;u.pnbase:  resd 1 
   310                              <1> 		; 16/06/2015 (physical base/transfer address, 'namei', 'mkdir')
   311                              <1> 			 ; 09/06/2015
   312 00030182 ??                  <1> 	u.kcall:  resb 1 ; The caller is 'namei' (dskr) or 'mkdir' (dskw) sign		
   313 00030183 ??                  <1> 	u.brwdev: resb 1 ; Block device number for direct I/O (bread & bwrite)
   314                              <1> 			 ; 24/07/2015 - 24/06/2015
   315                              <1> 	;u.args:  resd 1 ; arguments list (line) offset from start of [u.upage]
   316                              <1> 			 ; (arg list/line is from offset [u.args] to 4096 in [u.upage])
   317                              <1> 			 ; ([u.args] points to argument count -argc- address offset)
   318                              <1>  			 ; 24/06/2015	  	
   319                              <1> 	;u.core:  resd 1 ; physical start address of user's memory space (for sys exec)
   320                              <1> 	;u.ecore: resd 1 ; physical end address of user's memory space (for sys exec)
   321                              <1> 	; last error number
   322 00030184 ????????            <1> 	u.error:  resd 1 ; 28/07/2013 - 09/03/2015 
   323                              <1> 		         ; Retro UNIX 8086/386 v1 feature only!
   324                              <1> 			 ; 21/09/2015 (debugging - page fault analyze)
   325 00030188 ????????            <1> 	u.pfcount: resd 1 ; page fault count for (this) process (for sys geterr)
   326                              <1> 		; 19/12/2016 (TRDOS 386)	
   327 0003018C ????????            <1> 	u.tcb:	  resd 1 ; Timer callback address/flag which will be used by timer int
   328                              <1> 		; 13/01/2017 (TRDOS 386)
   329 00030190 ??                  <1> 	u.t_lock: resb 1 ; Timer interrupt (callback) lock (unlocked by 'sysrele')
   330 00030191 ??                  <1> 	u.t_mode: resb 1 ; running mode during timer interrupt (0= system, 0FFh= user)
   331                              <1> 		; 26/02/2017 (TRDOS 386)
   332 00030192 ??                  <1> 	u.irqc:	  resb 1  ; Count of IRQ callback services (IRQs in use)
   333                              <1> 		; 28/02/2017 (TRDOS 386) 
   334 00030193 ??                  <1> 	u.irqwait: resb 1 ; IRQ waiting for callback service flag (IRQ number, If > 0)
   335 00030194 ??                  <1> 	u.r_lock: resb 1 ; 'IRQ callback service is in progress' flag (IRQ lock)
   336 00030195 ??                  <1> 	u.r_mode: resb 1 ; running mode during hadware interrupt
   337                              <1> 	; 23/07/2022
   338 00030196 ??                  <1> 	u.exit:	  resb 1 ; exit code
   339                              <1> 	; 27/02/2017 (TRDOS 386) 
   340 00030197 ??                  <1> 	u.fpsave: resb 1 ; TRDOS 386, 'save/restore FPU registers' flag
   341                              <1> alignb 4
   342                              <1> 	; !! wrong sizing in TRDOS 386 v2.0.4 (in 'ubss.s', 28/02/2017) !! 
   343                              <1> 	;u.fpregs: resb 94 ; 94 byte area for saving and restoring FPU registers
   344                              <1> 	; 23/07/2022
   345 00030198 <res 6Ch>           <1> 	u.fpregs: resb 108 ; 108 byte area for saving and restoring FPU registers
   346                              <1> 
   347                              <1> alignb 4
   348                              <1> 
   349                              <1> U_SIZE	equ $ - user
   350                              <1> 
   351                              <1> ; 18/10/2015 - Retro UNIX 386 v1 (local variables for 'namei' and 'sysexec')
   352 00030204 ????????            <1> pcore:	resd 1  ; physical start address of user's memory space (for sys exec)
   353 00030208 ????????            <1> ecore:	resd 1  ; physical address of user's stack/last page (for sys exec)
   354 0003020C ????????            <1> nbase:	resd 1	; physical base address for 'namei' & 'sysexec'
   355                              <1> ; 23/07/202 - TRDOS 386 Kernel v2.0.5
   356                              <1> ;ncount: resw 1
   357 00030210 ????????            <1> ncount: resd 1	; remain byte count in page for 'namei' & 'sysexec'
   358                              <1> ;argc:	resw 1
   359 00030214 ????????            <1> argc:	resd 1	; argument count for 'sysexec'
   360 00030218 ????????            <1> argv:	resd 1	; argument list (recent) address for 'sysexec'
   361                              <1> 
   362                              <1> ; 03/06/2015 - Retro UNIX 386 v1 Beginning
   363                              <1> ; 07/04/2013 - 31/07/2013 - Retro UNIX 8086 v1
   364 0003021C ??                  <1> rw:	resb 1 ;; Read/Write sign (iget)
   365                              <1> ; 23/07/2022
   366 0003021D ??????              <1> 	resb 3	
   367                              <1> 
   368                              <1> alignb 4
   369                              <1> 
   370                              <1> ; 24/04/2016
   371 00030220 ????????            <1> ii:	resd 1 ; first cluster of the program file
   372 00030224 ????????            <1> i.size:	resd 1 ; size of the program file
  3876                                  
  3877                                  alignb 4
  3878                                  
  3879                                  ; 23/05/2016 (TRDOS 386)
  3880                                  ; 14/10/2015 (Retro UNIX 386 v1, 'unix386.s')
  3881 00030228 ????????                cr3reg:	 resd 1  ; cr3 register content at the beginning of the timer
  3882                                  		 ; (or RTC) interrupt handler.
  3883                                  
  3884                                  ; 10/12/2016 (callback)
  3885                                  ; 10/06/2016
  3886                                  ; 19/05/2016
  3887                                  ; 18/05/2016 - TRDOS 386 feature only !
  3888 0003022C <res 100h>              timer_set: resd 16*4   ; 256 bytes memory space for 16 timer events
  3889                                  	; Timer Event Structure: (max. 16 timer events, 16*16 bytes)
  3890                                  	;       Owner:	        resb 1 ; 0 = free
  3891                                  	;		  	       ;>0 = process number (u.uno)
  3892                                  	;	Callback:	resb 1 ; 0 = response byte address (phy)
  3893                                  	;				 1 = callback address (virtual)				
  3894                                  	;	Interrupt:      resb 1 ; 0 = Timer interrupt (or none)
  3895                                  	;		   	       ; 1 = Real Time Clock interrupt 
  3896                                  	;	Response:       resb 1 ; 0 to 255, signal return value
  3897                                  	;	Count Limit:	resd 1 ; count of ticks (total/set)
  3898                                  	;	Current Count: 	resd 1 ; count of ticks (current)
  3899                                  	;	Response Addr:  resd 1 ; response byte (pointer) address
  3900                                  	;			       ; (or callback -user service- address)	
  3901                                  
  3902                                  
  3903                                  ; 17/04/2021
  3904                                  ; (memory page swap parameters are disabled as temporary)
  3905                                  ;
  3906                                  ; Memory (swap) Data (11/03/2015)
  3907                                  ; 09/03/2015
  3908                                  ;swpq_count: resw 1 ; count of pages on the swap queue
  3909                                  ;swp_drv:    resd 1 ; logical drive description table address of the swap drive/disk
  3910                                  ;swpd_size:  resd 1 ; size of swap drive/disk (volume) in sectors (512 bytes). 		  				
  3911                                  ;swpd_free:  resd 1 ; free page blocks (4096 bytes) on swap disk/drive (logical)
  3912                                  ;swpd_next:  resd 1 ; next free page block
  3913                                  ;swpd_last:  resd 1 ; last swap page block	
  3914                                  
  3915                                  alignb 4
  3916                                  
  3917                                  ; 10/07/2015
  3918                                  ; 28/08/2014
  3919 0003032C ????????                error_code:	resd 1
  3920                                  ; 29/08/2014
  3921 00030330 ????????                FaultOffset: 	resd 1
  3922                                  ; 21/09/2015
  3923 00030334 ????????                PF_Count:	resd 1	; total page fault count
  3924                                  		       	; (for debugging - page fault analyze)
  3925                                  		 	; 'page_fault_handler' (memory.inc)
  3926                                  			; 'sysgeterr' (u9.s)
  3927                                  
  3928                                  ; 29/04/2016 (TRDOS 386 = TRDOS v2.0)
  3929                                  ; 22/08/2015 (Retro UNIX 386 v1)
  3930                                  buffer: 
  3931 00030338 ????????????????        	resb	8 
  3932                                  readi_buffer:
  3933 00030340 <res 200h>              	resb 	512
  3934 00030540 ????????????????        	resb	8
  3935                                  writei_buffer:
  3936 00030548 <res 200h>              	resb	512	
  3937                                  ; 24/10/2016
  3938 00030748 ????????????????        	resb	8 
  3939                                  rw_buffer:
  3940 00030750 <res 800h>              	resb 	2048  ; general purposed, r/w sector buffer
  3941                                  
  3942                                  %if 1
  3943                                  ; 17/01/2021
  3944 00030F50 <res 80h>               edid_info:	resb 128 ; VESA EDID (monitor capabilities) info	
  3945                                  ; 28/11/2020
  3946 00030FD0 ??                      pmi32:		resb 1	; (>0) use VESA VBE3 protected mode calls 
  3947 00030FD1 ??                      vbe_mode_x:	resb 1  ; VESA VBE3 video bios mode set options
  3948 00030FD2 ????                    video_mode:	resw 1	; VESA VBE3 video mode (with option flags)
  3949                                  ; 30/11/2020
  3950 00030FD4 ????????                vbe3bios_addr:	resd 1	; new (writable mem) address of VBE3 bios
  3951                                  ; 02/12/2020
  3952 00030FD8 ????????                pmid_addr:	resd 1	; PMInfoBlock ('PMID') linear address
  3953                                  ; 14/01/2021
  3954                                  ; 06/12/2020		; VESA VBE 3 video state
  3955                                  ;vbe3stbufsize: resw 1	; video regs/dac/bios state buffer size
  3956                                  ;			; block size in bytes
  3957                                  ; 16/01/2021
  3958 00030FDC ????                    vbe3stbsflags: resw 1	; video regs/dac/bios state buffer size
  3959                                  ;			; pointer flags for buffer state options
  3960                                  %endif
  3961                                  
  3962                                  %if 1
  3963                                  ; 10/12/2020
  3964                                  LFB_Info:
  3965 00030FDE <res 10h>               		resb 16	; Linear Frame Buffer info block
  3966                                  
  3967                                  ;24/11/2020 - TRDOS 386 v2.0.3
  3968                                  ; BOCHS/PLEX86 VESA VBE3 MODE INFO extension to TRDOS 386 v2 kernel	
  3969                                  MODE_INFO_LIST:
  3970 00030FEE <res 44h>               		resb 68	; mode + 66 byte VESA vbe3 mode info (4F01h) 
  3971                                  %endif
  3972                                  
  3973                                  ; 05/01/2021
  3974 00031032 ??                      ufont:		resb 1	; (VGA graphics) user font flags
  3975                                  			; bit 7 - permission flag for int 31h
  3976                                  			; bit 4 - 8x16 user font ready/loaded flag  
  3977                                  			; bit 3 - 8x8 user font ready/loaded flag
  3978                                  			; bit 1 - select 8x16 user font (sysvideo)
  3979                                  			; bit 0 - select 8x8 user font (sysvideo)
  3980 00031033 ??                      		resb 1	; 19/01/2021
  3981                                  ; 17/01/2021
  3982 00031034 ??                      srvsf:		resb 1	; 'save restore video state' permission flag
  3983                                  ; 18/01/2021
  3984 00031035 ??                      srvso:		resb 1	; video state buffer save/restore option
  3985 00031036 ????????                VideoStateID:	resd 1	; used to verify state saved by same prog
  3986                                  ; 29/01/2021
  3987 0003103A ????                    v_width:	resw 1	; screen (display page) width
  3988 0003103C ??                      v_ops:		resb 1	; 'sysvideo' graphics data transfer option	
  3989 0003103D ??                      v_bpp:		resb 1	; bits per pixels ('sysvideo')
  3990 0003103E ????????                v_mem:		resd 1	; video memory ('sysvideo')	
  3991 00031042 ????????                v_siz:		resd 1	; video page size ('sysvideo')
  3992 00031046 ????????                v_str:		resd 1	; window start adress ('sysvideo')
  3993 0003104A ????????                v_end:		resd 1	; window end (end+1) adress ('sysvideo')
  3994                                  ; 31/01/2021
  3995                                  ; 01/01/2021
  3996                                  ;maskbuff:     ;resd 1	; user's bitmask buffer addr ('sysvideo')
  3997 0003104E ????????                maskcolor:	resd 1	; VGA/SVGA pixel mask color ('sysvideo')
  3998                                  ; 27/02/2021
  3999 00031052 ????????                pixcount:	resd 1	; pixel count ('sysvideo' window ops) 
  4000                                  ; 02/02/2021
  4001 00031056 ????????????????        buffer8:	resd 2	; 8 bytes small buffer for 'sysvideo'  
  4002                                  
  4003                                  bss_end:
  4004                                  
  4005                                  ; 27/12/2013
  4006                                  _end:  ; end of kernel code
