;---------------------------------------- ; 80286 INTERRUPT LOCATIONS : ; REFERENCED BY POST & BIOS : ;---------------------------------------- ABS0 SEGMENT AT 0 ; ADDRESS= 0000:0000 @STG_LOC0 DB ? ; START OF INTERRUPT VECTOR TABLE ORG 4*002H @NMI_PTR DD ? ; NON-MASKABLE INTERRUPT VECTOR ORG 4*005H @INT5_PTR DD ? ; PRINT SCREEN INTERRUPT VECTOR ORG 4*008H @INT_PTR DD ? ; HARDWARE INTERRUPT POINTER (8-F) ORG 4*010H @VIDEO_INT DD ? ; VIDEO I/O INTERRUPT VECTOR ORG 4*013H @ORG_VECTOR DD ? ; DISKETTE/DISK INTERRUPT VECTOR ORG 4*018H @BASIC_PTR DD ? ; POINTER TO CASSETTE BASIC ORG 4*01DH @PARM_PTR DD ? ; POINTER TO VIDEO PARAMETERS ORG 4*01EH @DISK_POINTER DD ? ; POINTER TO DISKETTE PARAMETER TABLE ORG 4*01FH @EXT_PTR DD ? ; POINTER TO GRAPHIC CHARACTERS 128-255 ORG 4*040H @DISK_VECTOR DD ? ; POINTER TO DISKETTE INTERRUPT CODE ORG 4*041H @HF_TBL_VEC DD ? ; POINTER TO FIRST DISK PARAMETER TABLE ORG 4*046H @HF1_TBL_VEC DD ? ; POINTER TO SECOND DISK PARAMETER TABLE ORG 4*070H @SLAVE_INT_PTR DD ? ; POINTER TO SLAVE INTERRUPT HANDLER ORG 4*076H @HDISK_INT DD ? ; POINTER TO FIXED DISK INTERRUPT CODE ORG 0400H @TOS DW ? ; STACK -- USED DURING POST ONLY ; USE WILL OVERLAY INTERRUPTS VECTORS ORG 0500H @MFG_TEST_RTN LABEL FAR ; LOAD LOCATION FOR MANUFACTURING TESTS ORG 7C00H @BOOT_LOCN LABEL FAR ; BOOT STRAP CODE LOAD LOCATION ABS0 ENDS PAGE ;---------------------------------------- ; ROM BIOS DATA AREAS : ;---------------------------------------- DATA SEGMENT AT 40H ; ADDRESS= 0040:0000 @RS232_BASE DW ? ; BASE ADDRESSES OF RS232 ADAPTERS DW ? ; SECOND LOGICAL RS232 ADAPTER DW ? ; RESERVED DW ? ; RESERVED @PRINTER_BASE DW ? ; BASE ADDRESSES OF PRINTER ADAPTERS DW ? ; SECOND LOGICAL PRINTER ADAPTER DW ? ; THIRD LOGICAL PRINTER ADAPTER DW ? ; RESERVED @EQUIP_FLAG DW ? ; INSTALLED HARDWARE FLAGS @MFG_TST DB ? ; INITIALIZATION FLAGS @MEMORY_SIZE DW ? ; BASE MEMORY SIZE IN K BYTES (X 1024) @MFG_ERR_FLAG DB ? ; SCRATCHPAD FOR MANUFACTURING DB ? ; ERROR CODES ;---------------------------------------- ; KEYBOARD DATA AREAS : ;---------------------------------------- @KB_FLAG DB ? ; KEYBOARD SHIFT STATE AND STATUS FLAGS @KB_FLAG_1 DB ? ; SECOND BYTE OF KEYBOARD STATUS @ALT_INPUT DB ? ; STORAGE FOR ALTERNATE KEY PAD ENTRY @BUFFER_HEAD DW ? ; POINTER TO HEAD OF KEYBOARD BUFFER @BUFFER_TAIL DW ? ; POINTER TO TAIL OF KEYBOARD BUFFER ;------ HEAD = TAIL INDICATES THAT THE BUFFER IS EMPTY @KB_BUFFER DW 16 DUP (?) ; ROOM FOR 15 SCAN CODE ENTRIES ;---------------------------------------- ; DISKETTE DATA AREAS : ;---------------------------------------- @SEEK_STATUS DB ? ; DRIVE RECALIBRATION STATUS ; BIT 3-0 = DRIVE 3-0 RECALIBRATION ; BEFORE NEXT SEEK IF BIT IS = 0 @MOTOR_STATUS DB ? ; MOTOR STATUS ; BIT 3-0 = DRIVE 3-0 CURRENTLY RUNNING ; BIT 7 = CURRENT OPERATION IS A WRITE @MOTOR_COUNT DB ? ; TIME OUT COUNTER FOR MOTOR(S) TURN OFF @DSKETTE_STATUS DB ? ; RETURN CODE STATUS BYTE ; CMD_BLOCK IN STACK FOR DISK OPERATION @NEC_STATUS DB 7 DUP(?) ; STATUS BYTES FROM DISKETTE OPERATION ;---------------------------------------- ; VIDEO DISPLAY DATA AREA : ;---------------------------------------- @CRT_MODE DB ? ; CURRENT DISPLAY MODE (TYPE) @CRT_COLS DW ? ; NUMBER OF COLUMNS ON SCREEN @CRT_LEN DW ? ; LENGTH OF REGEN BUFFER IN BYTES @CRT_START DW ? ; STARTING ADDRESS IN REGEN BUFFER @CURSOR_POSN DW 8 DUP(?) ; CURSOR FOR EACH OF UP TO 8 PAGES @CURSOR_MODE DW ? ; CURRENT CURSOR MODE SETTING @ACTIVE_PAGE DB ? ; CURRENT PAGE BEING DISPLAYED @ADDR_6845 DW ? ; BASE ADDRESS FOR ACTIVE DISPLAY CARD @CRT_MODE_SET DB ? ; CURRENT SETTING OF THE 3X8 REGISTER @CRT_PALETTE DB ? ; CURRENT PALETTE SETTING - COLOR CARD ;---------------------------------------- ; POST AND BIOS WORK DATA AREA : ;---------------------------------------- ; STACK SAVE, ETC. @IO_ROM_INIT DW ? ; POINTER TO ROM INITIALIZATION ROUTINE @IO_ROM_SEG DW ? ; POINTER TO I/O ROM SEGMENT @INTR_FLAG DB ? ; FLAG INDICATING AN INTERRUPT HAPPENED ;---------------------------------------- ; TIMER DATA AREA : ;---------------------------------------- @TIMER_LOW DW ? ; LOW WORD OF TIMER COUNT @TIMER_HIGH DW ? ; HIGH WORD OF TIMER COUNT @TIMER_OFL DB ? ; TIMER HAS ROLLED OVER SINCE LAST READ ;---------------------------------------- ; SYSTEM DATA AREA : ;---------------------------------------- @BIOS_BREAK DB ? ; BIT 7=1 IF BREAK KEY HAS BEEN PRESSED @RESET_FLAG DW ? ; WORD=1234H IF KEYBOARD RESET UNDERWAY ;---------------------------------------- ; FIXED DISK DATA AREAS : ;---------------------------------------- @DISK_STATUS1 DB ? ; FIXED DISK STATUS @HF_NUM DB ? ; COUNT OF FIXED DISK DRIVES @CONTROL_BYTE DB ? ; HEAD CONTROL BYTE @PORT_OFF DB ? ; RESERVED (PORT OFFSET) PAGE ;---------------------------------------- ; TIME-OUT VARIABLES : ;---------------------------------------- @PRINT_TIM_OUT DB ? ; TIME OUT COUNTERS FOR PRINTER RESPONSE DB ? ; SECOND LOGICAL PRINTER ADAPTER DB ? ; THIRD LOGICAL PRINTER ADAPTER DB ? ; RESERVED @RS232_TIM_OUT DB ? ; TIME OUT COUNTERS FOR RS232 RESPONSE DB ? ; SECOND LOGICAL RS232 ADAPTER DB ? ; RESERVED DB ? ; RESERVED ;---------------------------------------- ; ADDITIONAL KEYBOARD DATA AREA : ;---------------------------------------- ; BUFFER LOCATION WITHIN SEGMENT 40H @BUFFER_START DW ? ; OFFSET OF KEYBOARD BUFFER START @BUFFER_END DW ? ; OFFSET OF END OF BUFFER ;---------------------------------------- ; EGA/PGA DISPLAY WORK AREA : ;---------------------------------------- @ROWS DB ? ; ROWS ON THE ACTIVE SCREEN (LESS 1) @POINTS DW ? ; BYTES PER CHARACTER @INFO DB ? ; MODE OPTIONS @INFO_3 DB ? ; FEATURE BIT SWITCHES DB ? ; RESERVED FOR DISPLAY ADAPTERS DB ? ; RESERVED FOR DISPLAY ADAPTERS ;---------------------------------------- ; ADDITIONAL MEDIA DATA : ;---------------------------------------- @LASTRATE DB ? ; LAST DISKETTE DATA RATE SELECTED @HF_STATUS DB ? ; STATUS REGISTER @HF_ERROR DB ? ; ERROR REGISTER @HF_INT_FLAG DB ? ; FIXED DISK INTERRUPT FLAG @HF_CNTRL DB ? ; COMBO FIXED DISK/DISKETTE CARD BIT 0=1 @DSK_STATE DB ? ; DRIVE 0 MEDIA STATE DB ? ; DRIVE 1 MEDIA STATE DB ? ; DRIVE 0 OPERATION START STATE DB ? ; DRIVE 1 OPERATION START STATE @DSK_TRK DB ? ; DRIVE 0 PRESENT CYLINDER DB ? ; DRIVE 1 PRESENT CYLINDER ;---------------------------------------- ; ADDITIONAL KEYBOARD FLAGS : ;---------------------------------------- @KB_FLAG_3 DB ? ; KEYBOARD MODE STATE AND TYPE FLAGS @KB_FLAG_2 DB ? ; KEYBOARD LED FLAGS ;---------------------------------------- ; REAL TIME CLOCK DATA AREA : ;---------------------------------------- @USER_FLAG DW ? ; OFFSET ADDRESS OF USERS WAIT FLAG @USER_FLAG_SEG DW ? ; SEGMENT ADDRESS OF USER WAIT FLAG @RTC_LOW DW ? ; LOW WORD OF USER WAIT FLAG @RTC_HIGH DW ? ; HIGH WORD OF USER WAIT FLAG @RTC_WAIT_FLAG DB ? ; WAIT ACTIVE FLAG (01=BUSY, 80=POSTED) ; (00=POST ACKNOWLEDGED) ;---------------------------------------- ; AREA FOR NETWORK ADAPTER : ;---------------------------------------- @NET DB 7 DUP(?) ; RESERVED FOR NETWORK ADAPTERS ;---------------------------------------- ; EGA/PGA PALETTE POINTER : ;---------------------------------------- @SAVE_PTR DD ? ; POINTER TO EGA PARAMETER CONTROL BLOCK ; RESERVED ;---------------------------------------- ; DATA AREA - PRINT SCREEN : ;---------------------------------------- ORG 100H ; ADDRESS= 0040:0100 (REF 0050:0000) @STATUS_BYTE DB ? ; PRINT SCREEN STATUS BYTE ; 00=READY/OK, 01=BUSY, FF=ERROR DATA ENDS ; END OF BIOS DATA SEGMENT