| 1 | ; File name : DosFunctions.inc
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| 2 | ; Project name : AssemblyLibrary
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| 3 | ; Created date : 1.9.2010
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| 4 | ; Last update : 8.10.2010
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| 5 | ; Author : Tomi Tilli
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| 6 | ; Description : Defines for MS-DOS functions.
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| 7 | %ifndef DOS_FUNCTIONS_INC
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| 8 | %define DOS_FUNCTIONS_INC
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| 9 |
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| 10 | ; DOS interrupts
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| 11 | DOS_INTERRUPT_21h EQU 21h
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| 12 | DOS_CRITICAL_ERROR_HANDLER_24h EQU 24h
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| 13 |
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| 14 | ; DOS file functions
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| 15 | SELECT_DEFAULT_DRIVE EQU 0Eh
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| 16 | GET_CURRENT_DEFAULT_DRIVE EQU 19h
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| 17 | SET_INTERRUPT_VECTOR EQU 25h
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| 18 | GET_DISK_TRANSFER_AREA_ADDRESS EQU 2Fh
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| 19 | GET_DOS_DRIVE_PARAMETER_BLOCK_FOR_SPECIFIC_DRIVE EQU 32h
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| 20 | SET_CURRENT_DIRECTORY EQU 3Bh
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| 21 | OPEN_EXISTING_FILE EQU 3Dh
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| 22 | CLOSE_FILE EQU 3Eh
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| 23 | READ_FROM_FILE_OR_DEVICE EQU 3Fh
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| 24 | WRITE_TO_FILE_OR_DEVICE EQU 40h
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| 25 | SET_CURRENT_FILE_POSITION EQU 42h
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| 26 | GET_CURRENT_DIRECTORY EQU 47h
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| 27 | FIND_FIRST_MATCHING_FILE EQU 4Eh
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| 28 | FIND_NEXT_MATCHING_FILE EQU 4Fh
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| 29 |
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| 30 | ; DOS errors
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| 31 | ERR_DOS_DRIVE_NOT_READY EQU 15h
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| 32 |
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| 33 |
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| 34 |
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| 35 | ; DOS Program Segment Prefix (PSP, first 256 (100h) bytes on top of program)
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| 36 | struc PSP
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| 37 | .int20hInstruction resb 2
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| 38 | .wSizeOfMemoryInParagraphs resb 2
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| 39 | .reservedAt4h resb 1
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| 40 | .callToDosFunctionDispatcher resb 5
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| 41 | .fpInt22hTerminate resb 4
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| 42 | .fpInt23hCtrlC resb 4
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| 43 | .fpInt24hCriticalError resb 4
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| 44 | .reservedAt16h resb 22
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| 45 | .wEnvironmentSegment resb 2
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| 46 | .reservedAt2Eh resb 34
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| 47 | .int21hAndRetfInstructions resb 3
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| 48 | .reservedAt53h resb 9
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| 49 | .FCB1 resb 16
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| 50 | .FCB2 resb 20
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| 51 | .DiskTransferArea:
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| 52 | .bCommandLineLength resb 1
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| 53 | .szCommandLine resb 127
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| 54 | endstruc
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| 55 |
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| 56 |
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| 57 | ; DOS DTA (Disk Transfer Area)
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| 58 | struc DTA
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| 59 | ; Undocumented fields
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| 60 | .reservedAt0h resb 21
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| 61 | ; Documented fields
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| 62 | .bFileAttributes resb 1 ; 15h, Attribute of matching file
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| 63 | .wFileTime resb 2 ; 16h, File time
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| 64 | .wFileDate resb 2 ; 18h, File date
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| 65 | .dwFileSize resb 4 ; 1Ah, File size in bytes
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| 66 | .szFile resb 13 ; 1Eh, ASCIZ filename + extension
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| 67 | endstruc
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| 68 |
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| 69 |
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| 70 | %endif ; DOS_FUNCTIONS_INC
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