source: xtideuniversalbios/trunk/Assembly_Library/Inc/DosFunctions.inc@ 85

Last change on this file since 85 was 85, checked in by Tomi Tilli, 14 years ago

Changes to Assembly Library:

  • Some minor adjustments
File size: 2.1 KB
Line 
1; File name : DosFunctions.inc
2; Project name : AssemblyLibrary
3; Created date : 1.9.2010
4; Last update : 3.1.2011
5; Author : Tomi Tilli
6; Description : Defines for MS-DOS functions.
7%ifndef DOS_FUNCTIONS_INC
8%define DOS_FUNCTIONS_INC
9
10; DOS interrupts
11DOS_INTERRUPT_21h EQU 21h
12DOS_CRITICAL_ERROR_HANDLER_24h EQU 24h
13DOS_TSR_MULTIPLEX_INTERRUPT_2Fh EQU 2Fh
14
15; DOS drive and file functions
16SELECT_DEFAULT_DRIVE EQU 0Eh
17GET_CURRENT_DEFAULT_DRIVE EQU 19h
18GET_DISK_TRANSFER_AREA_ADDRESS EQU 2Fh
19GET_DOS_DRIVE_PARAMETER_BLOCK_FOR_SPECIFIC_DRIVE EQU 32h
20SET_CURRENT_DIRECTORY EQU 3Bh
21OPEN_EXISTING_FILE EQU 3Dh
22CLOSE_FILE EQU 3Eh
23READ_FROM_FILE_OR_DEVICE EQU 3Fh
24WRITE_TO_FILE_OR_DEVICE EQU 40h
25SET_CURRENT_FILE_POSITION EQU 42h
26GET_CURRENT_DIRECTORY EQU 47h
27FIND_FIRST_MATCHING_FILE EQU 4Eh
28FIND_NEXT_MATCHING_FILE EQU 4Fh
29
30; DOS functions for TSRs
31SET_INTERRUPT_VECTOR EQU 25h
32GET_INTERRUPT_VECTOR EQU 35h
33
34; DOS errors
35ERR_DOS_DRIVE_NOT_READY EQU 15h
36
37
38
39; DOS Program Segment Prefix (PSP, first 256 (100h) bytes on top of program)
40struc PSP
41 .int20hInstruction resb 2
42 .wSizeOfMemoryInParagraphs resb 2
43 .reservedAt4h resb 1
44 .callToDosFunctionDispatcher resb 5
45 .fpInt22hTerminate resb 4
46 .fpInt23hCtrlC resb 4
47 .fpInt24hCriticalError resb 4
48 .reservedAt16h resb 22
49 .wEnvironmentSegment resb 2
50 .reservedAt2Eh resb 34
51 .int21hAndRetfInstructions resb 3
52 .reservedAt53h resb 9
53 .FCB1 resb 16
54 .FCB2 resb 20
55 .DiskTransferArea:
56 .bCommandLineLength resb 1
57 .szCommandLine resb 127
58endstruc
59
60
61; DOS DTA (Disk Transfer Area)
62struc DTA
63 ; Undocumented fields
64 .reservedAt0h resb 21
65 ; Documented fields
66 .bFileAttributes resb 1 ; 15h, Attribute of matching file
67 .wFileTime resb 2 ; 16h, File time
68 .wFileDate resb 2 ; 18h, File date
69 .dwFileSize resb 4 ; 1Ah, File size in bytes
70 .szFile resb 13 ; 1Eh, ASCIZ filename + extension
71endstruc
72
73
74%endif ; DOS_FUNCTIONS_INC
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