239 lines
6.0 KiB
NASM
239 lines
6.0 KiB
NASM
;**************************************************************************
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;**************************************************************************
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;
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; WDOS-BIOS - Quelle (C) ZFT/KEAW Abt. Basissoftware - 1988
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; Programm: dseg.asm
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;
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; Bearbeiter : P. Hoge
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; Datum : 24.1.89
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; Version : 1.1
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;
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;**************************************************************************
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;
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; BIOS-Datensegment
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;
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;**************************************************************************
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;**************************************************************************
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;-------------------------------------------
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; INTERRUPT LOCATIONS
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;-------------------------------------------
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.PUBLIC DISK_POINTER
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.PUBLIC HF_TBL_VEC
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.PUBLIC HF1_TBL_VEC
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.PUBLIC BOOT_LOCN
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.ORG 0:0 ;ABS0 SEGMENT
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STG_LOC0 ;BYTE
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ORG 1EH*4
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DISK_POINTER ;DWORD
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ORG 41H*4
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HF_TBL_VEC ;DWORD
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ORG 46H*4
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HF1_TBL_VEC ;DWORD
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ORG 400H
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DATA_AREA ;BYTE ;ABSOLUTE LOCATION OF DATA SEGMENT
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DATA_WORD ;WORD
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ORG 0500H
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MFG_TEST_RTN ;FAR
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ORG 7C00H
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BOOT_LOCN ;FAR
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;-------------------------------------------
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;STACK -- USED DURING INITIALIZATION ONLY
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;-------------------------------------------
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.ORG 30:0H ;STACK SEGMENT
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.PUBLIC TOS
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BLKW 128
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TOS BLKW 0
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;-------------------------------------------
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; ROM BIOS DATA AREAS
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;-------------------------------------------
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.ORG 40:0H ;DATA SEGMENT
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.PUBLIC EQUIP_FLAG
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.PUBLIC MEMORY_SIZE
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DATA_BASE
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RS232_BASE BLKW 4 ;ADDRESSES OF RS232 ADAPTERS
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PRINTER_BASE BLKW 4 ;ADDRESSES OF PRINTERS
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EQUIP_FLAG BLKW 1 ;INSTALLED HARDWARE
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MFG_TST BLKB 1 ;INITIALIZATION FLAG
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MEMORY_SIZE BLKW 1 ;MEMORY SIZE IN K BYTES
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MFG_ERR_FLAG BLKB 1 ;SCRATCHPAD FOR MANUFACTURING
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BLKB 1 ;ERROR CODES
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;----------------------------------------
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; KEYBOARDS DATA AREAS
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;----------------------------------------
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.PUBLIC KB_FLAG
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.PUBLIC KB_FLAG_1
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.PUBLIC ALT_INPUT
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.PUBLIC BUFFER_HEAD
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.PUBLIC BUFFER_TAIL
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.PUBLIC KB_BUFFER
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KB_FLAG BLKB 1
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KB_FLAG_1 BLKB 1 ;SECOND BYTE OF KEYBOARD STATUS
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ALT_INPUT BLKB 1 ;STORAGE FOR ALTERNATE KEYPAD ENTRY
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BUFFER_HEAD BLKW 1 ;POINTER TO HEAD OF KEYBOARD BUFFER
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BUFFER_TAIL BLKW 1 ;POINTER TO TAIL OF KEYBOARD BUFFER
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KB_BUFFER BLKW 16 ;ROOM FOR 15 ENTRIES
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KB_BUFFER_END BLKW 0
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;---------------------------------------
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; DISKETTE DATA AREAS
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;---------------------------------------
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.PUBLIC SEEK_STATUS
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.PUBLIC DISKETTE_STATUS
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SEEK_STATUS BLKB 1
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MOTOR_STATUS BLKB 1
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MOTOR_COUNT BLKB 1
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DISKETTE_STATUS BLKB 1 ;RETURN CODE STATUS BYTE
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CMD_BLOCK
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HD_ERROR
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NEC_STATUS BLKB 7
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;---------------------------------------
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.PUBLIC CRT_MODE
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.PUBLIC CRT_COLS
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.PUBLIC CRT_LEN
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.PUBLIC CURSOR_POSN
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.PUBLIC CURSOR_MODE
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.PUBLIC ADDR_6845
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CRT_MODE BLKB 1 ;CURRENT CRT MODE
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CRT_COLS BLKW 1 ;NUMBER OF COLUMNS ON SCREEN
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CRT_LEN BLKW 1 ;LENGTH OF REGEN IN BYTES
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CRT_START BLKW 1 ;STARTING ADDRESS IN REGEN BUFFER
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CURSOR_POSN BLKW 8 ;CURSOR FOR EACH OF UP TO 8 PAGES
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CURSOR_MODE BLKW 1 ;CURRENT CURSOR MODE SETTING
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ACTIVE_PAGE BLKB 1 ;CURRENT PAGE BEING DISPLAYED
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ADDR_6845 BLKW 1 ;BASE ADDRESS FOR ACTIVE DISPLAY CARD
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CRT_MODE_SET BLKB 1 ;CURRENT SETTING OF THE 3x8 REGISTER
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CRT_PALLETTE BLKB 1 ;CURRENT PALLETTE SETTING COLOR CARD
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;---------------------------------------
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; POST DATA AREA
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;---------------------------------------
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.PUBLIC IO_ROM_INIT
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IO_ROM_INIT BLKW 1 ;PNTR TO OPTIONAL I/O ROM INIT ROUTINE
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IO_ROM_SEG BLKW 1 ;POINTER TO IO ROM SEGMENT
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INTR_FLAG BLKB 1 ;FLAG TO INDICATE AN INTERRUPT HAPPEND
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;----------------------------------------
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; TIMER DATA AREA
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;----------------------------------------
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.PUBLIC TIMER_LOW
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.PUBLIC TIMER_HIGH
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.PUBLIC TIMER_OFL
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TIMER_LOW BLKW 1 ;LOW WORD OF TIMER COUNT
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TIMER_HIGH BLKW 1 ;HIGH WORD OF TIMER COUNT
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TIMER_OFL BLKB 1 ;TIMER HAS ROLLED OVER SINCE LAST READ
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;----------------------------------------
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; SYSTEM DATA AREA
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;----------------------------------------
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.PUBLIC BIOS_BREAK
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.PUBLIC RESET_FLAG
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BIOS_BREAK BLKB 1 ;BIT 7-1 IF BREAK KEY HAS BEEN HIT
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RESET_FLAG BLKW 1 ;WORD=1234H IF KEYBOARD RESET UNDERWAY
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;----------------------------------------
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; HARD FILE DATA AREAS
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;----------------------------------------
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DISK_STATUS1 BLKB 1
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HF_NUM BLKB 1
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CONTROL_BYTE BLKB 1
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PORT_OFF BLKB 1
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;-------------------------------------------------
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; PRINTER AND RS232 TIME-OUT VARIABLES
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;-------------------------------------------------
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.PUBLIC PRINT_TIM_OUT
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PRINT_TIM_OUT BLKB 4
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RS232_TIM_OUT BLKB 4
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;----------------------------------------
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; ADDITIONAL KEYBOARD DATA AREA
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;----------------------------------------
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.PUBLIC BUFFER_START
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.PUBLIC BUFFER_END
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BUFFER_START BLKW 1
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BUFFER_END BLKW 1
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;----------------------------------------
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; ADDITIONAL FLOPPY DATA
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;----------------------------------------
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ORG 8BH
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LASTRATE BLKB 1 ;LAST DATA RATE SELECTED
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;----------------------------------------
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; ADDITIONAL HARD FILE DATA
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;----------------------------------------
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HF_STATUS BLKB 1 ;STATUS REGISTER
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HF_ERROR BLKB 1 ;ERROR REGISTER
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HF_INT_FLAG BLKB 1 ;HARD FILE INTERRUPT FLAG
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HF_CNTRL BLKB 1 ;COMBO HARD FILE/FLOPPY CARD BIT 0=1
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;----------------------------------------
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; ADDITIONAL DISKETTE AREA
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;----------------------------------------
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DSK_STATE BLKB 1 ;DRIVE 0 MEDIA STATE
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BLKB 1 ;DRIVE 1 MEDIA STATE
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BLKB 1 ;DRIVE 0 OPERATION START STATE
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BLKB 1 ;DRIVE 1 OPERATION START STATE
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DSK_TRK BLKB 1 ;DRIVE 0 PRESENT CYLINDER
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BLKB 1 ;DRIVE 1 PRESENT CYLINDER
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;----------------------------------------
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; ADDITIONAL KEYBOARD LED FLAG
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;----------------------------------------
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.PUBLIC KB_EXT
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.PUBLIC KB_FLAG_2
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KB_EXT BLKB 1
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KB_FLAG_2 BLKB 1
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;----------------------------------------
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; REAL TIME CLOCK DATA AREA
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;----------------------------------------
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USER_FLAG BLKW 1 ;OFFSET ADDR OF USERS WAIT FLAG
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USER_FLAG_SEG BLKW 1 ;SEG ADDR OF USER WAIT FLAG
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RTC_LOW BLKW 1 ;LOW WORD OF USER WAIT FLAG
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RTC_HIGH BLKW 1 ;HIGH WORD OF USER WAIT FLAG
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RTC_WAIT_FLAG BLKB 1 ;WAIT ACTIVE FLAG
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;----------------------------------------
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; EXTRA DATA AREA
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;----------------------------------------
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.ORG 50:0H ;XXDATA SEGMENT
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.PUBLIC STATUS_BYTE
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STATUS_BYTE BLKB 1
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;----------------------------------------
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; VIDEO DISPLAY BUFFER
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;----------------------------------------
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;.ORG B000:0H ;VIDEO_RAM SEGMENT
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;REGEN BLKB 0
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;REGENW BLKW 0
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; BLKB 1024
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.END
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