source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/EBIOS.inc

Last change on this file was 542, checked in by aitotat@…, 9 years ago

Changes to XTIDE Universal BIOS:

  • Fixed a bug that allowed EBIOS functions for user defined CHS.
  • Simplified user defined CHS and LBA setup a little.
File size: 2.9 KB
Line 
1; Project name  :   XTIDE Universal BIOS
2; Description   :   Equates used in Enhanced INT 13h functions (EBIOS).
3
4;
5; XTIDE Universal BIOS and Associated Tools
6; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
7;
8; This program is free software; you can redistribute it and/or modify
9; it under the terms of the GNU General Public License as published by
10; the Free Software Foundation; either version 2 of the License, or
11; (at your option) any later version.
12;
13; This program is distributed in the hope that it will be useful,
14; but WITHOUT ANY WARRANTY; without even the implied warranty of
15; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16; GNU General Public License for more details.
17; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
18;
19
20%ifndef EBIOS_INC
21%define EBIOS_INC
22
23; EBIOS specification returned by INT 13h, AH=41h
24
25EDD_V1_1                            EQU 21h     ; 21h = EDD version 1.1
26EBIOS_VERSION                       EQU EDD_V1_1
27
28; Support bits returned by INT 13h, AH=41h
29ENHANCED_DRIVE_ACCESS_SUPPORT       EQU (1<<0)  ; 41h, 42h, 43h 44h, 47h and 48h are available
30DRIVE_LOCKING_AND_EJECTING_SUPPORT  EQU (1<<1)  ; 41h, 45h, 46h, 48h, 49h are available and INT 15h, AH=52h
31ENHANCED_DISK_DRIVE_SUPPORT         EQU (1<<2)  ; 41h, 48h, 4Eh are available (EDD)
32
33
34; Extended Drive Information returned by AH=48h
35struc EDRIVE_INFO
36    .wSize                  resb    2   ; 0, Size of this buffer, at least 26
37    .wFlags                 resb    2   ; 2, Information flags
38    .dwCylinders            resb    4   ; 4, Total number of addressable cylinders
39    .dwHeads                resb    4   ; 8, Total number of addressable heads
40    .dwSectorsPerTrack      resb    4   ; 12, Number of sectors per track
41    .qwTotalSectors         resb    8   ; 16, Total number of addressable sectors
42    .wSectorSize            resb    2   ; 24, Number of bytes per sector
43    .fpDPTE                 resb    4   ; 26, Optional pointer to Device Parameter Table Extension
44endstruc
45
46MINIMUM_EDRIVEINFO_SIZE         EQU     26  ; 26 bytes does not include EDD pointer
47EDRIVEINFO_SIZE_WITH_DPTE       EQU     EDRIVE_INFO_size
48MAX_SECTOR_COUNT_TO_RETURN_PCHS EQU     15482880
49
50; Flags for EDRIVE_INFO.wFlags
51FLG_DMA_BOUNDARY_ERRORS_HANDLED_BY_BIOS             EQU (1<<0)
52FLG_CHS_INFORMATION_IS_VALID                        EQU (1<<1)
53FLG_REMOVABLE_DRIVE                                 EQU (1<<2)
54FLG_WRITE_WITH_VERIFY_SUPPORTED                     EQU (1<<3)
55FLG_CHANGE_LINE_SUPPORT                             EQU (1<<4)  ; Removable media only
56FLG_LOCKABLE                                        EQU (1<<5)  ; Removable media only
57FLG_NO_MEDIA_PRESENT_AND_CHS_SET_TO_MAX             EQU (1<<6)  ; Removable media only
58
59
60; Disk Address Packet for read, write and verify functions
61struc DAP
62    .bSize                  resb    1   ; 0, Size of this packet in bytes
63    .bReservedAt1           resb    1   ; 1, Currently unused, must be zero
64    .wSectorCount           resb    2   ; 2, Number of sectors to process (0...127)
65    .dwMemoryAddress:
66    .wOffset                resb    2   ; 4, Memory offset for transfer
67    .wSegment               resb    2   ; 6, Memory segment for transfer
68    .qwLBA                  resb    8   ; 8, Starting sector for transfer
69endstruc
70
71MINIMUM_DAP_SIZE            EQU     16
72
73
74%endif ; EBIOS_INC
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