| 1 | ; Project name : AssemblyLibrary |
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| 2 | ; Description : Defines for MS-DOS functions. |
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| 3 | %ifndef DOS_FUNCTIONS_INC |
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| 4 | %define DOS_FUNCTIONS_INC |
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| 5 | |
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| 6 | ; DOS interrupts |
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| 7 | DOS_INTERRUPT_21h EQU 21h |
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| 8 | DOS_CRITICAL_ERROR_HANDLER_24h EQU 24h |
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| 9 | DOS_TSR_MULTIPLEX_INTERRUPT_2Fh EQU 2Fh |
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| 10 | |
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| 11 | ; DOS drive and file functions |
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| 12 | SELECT_DEFAULT_DRIVE EQU 0Eh |
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| 13 | GET_CURRENT_DEFAULT_DRIVE EQU 19h |
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| 14 | GET_DISK_TRANSFER_AREA_ADDRESS EQU 2Fh |
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| 15 | GET_DOS_DRIVE_PARAMETER_BLOCK_FOR_SPECIFIC_DRIVE EQU 32h |
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| 16 | SET_CURRENT_DIRECTORY EQU 3Bh |
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| 17 | CREATE_OR_TRUNCATE_FILE EQU 3Ch |
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| 18 | OPEN_EXISTING_FILE EQU 3Dh |
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| 19 | CLOSE_FILE EQU 3Eh |
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| 20 | READ_FROM_FILE_OR_DEVICE EQU 3Fh |
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| 21 | WRITE_TO_FILE_OR_DEVICE EQU 40h |
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| 22 | SET_CURRENT_FILE_POSITION EQU 42h |
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| 23 | GET_CURRENT_DIRECTORY EQU 47h |
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| 24 | FIND_FIRST_MATCHING_FILE EQU 4Eh |
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| 25 | FIND_NEXT_MATCHING_FILE EQU 4Fh |
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| 26 | |
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| 27 | ; DOS functions for TSRs |
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| 28 | SET_INTERRUPT_VECTOR EQU 25h |
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| 29 | GET_INTERRUPT_VECTOR EQU 35h |
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| 30 | |
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| 31 | ; DOS errors |
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| 32 | ERR_DOS_DRIVE_NOT_READY EQU 15h |
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| 33 | |
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| 34 | |
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| 35 | |
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| 36 | ; DOS Program Segment Prefix (PSP, first 256 (100h) bytes on top of program) |
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| 37 | struc PSP |
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| 38 | .int20hInstruction resb 2 |
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| 39 | .wSizeOfMemoryInParagraphs resb 2 |
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| 40 | .reservedAt4h resb 1 |
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| 41 | .callToDosFunctionDispatcher resb 5 |
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| 42 | .fpInt22hTerminate resb 4 |
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| 43 | .fpInt23hCtrlC resb 4 |
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| 44 | .fpInt24hCriticalError resb 4 |
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| 45 | .reservedAt16h resb 22 |
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| 46 | .wEnvironmentSegment resb 2 |
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| 47 | .reservedAt2Eh resb 34 |
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| 48 | .int21hAndRetfInstructions resb 3 |
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| 49 | .reservedAt53h resb 9 |
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| 50 | .FCB1 resb 16 |
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| 51 | .FCB2 resb 20 |
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| 52 | .DiskTransferArea: |
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| 53 | .bCommandLineLength resb 1 |
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| 54 | .szCommandLine resb 127 |
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| 55 | endstruc |
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| 56 | |
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| 57 | |
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| 58 | ; DOS DTA (Disk Transfer Area) |
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| 59 | struc DTA |
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| 60 | ; Undocumented fields |
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| 61 | .reservedAt0h resb 21 |
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| 62 | ; Documented fields |
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| 63 | .bFileAttributes resb 1 ; 15h, Attribute of matching file |
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| 64 | .wFileTime resb 2 ; 16h, File time |
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| 65 | .wFileDate resb 2 ; 18h, File date |
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| 66 | .dwFileSize resb 4 ; 1Ah, File size in bytes |
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| 67 | .szFile resb 13 ; 1Eh, ASCIZ filename + extension |
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| 68 | endstruc |
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| 69 | |
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| 70 | |
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| 71 | %endif ; DOS_FUNCTIONS_INC |
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