source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/EBIOS.inc @ 218

Last change on this file since 218 was 218, checked in by aitotat@…, 10 years ago

Changes to XTIDE Universal BIOS:

  • Number of sectors to transfer is now limited to 1-128 for old INT 13h functions.
File size: 2.2 KB
Line 
1; Project name  :   XTIDE Universal BIOS
2; Description   :   Equates used in Enhanced INT 13h functions (EBIOS).
3%ifndef EBIOS_INC
4%define EBIOS_INC
5
6; EBIOS specification returned by INT 13h, AH=41h
7EBIOS_VERSION                       EQU 21h     ; 21h = EDD version 1.1
8
9; Support bits returned by INT 13h, AH=41h
10ENHANCED_DRIVE_ACCESS_SUPPORT       EQU (1<<0)  ; 41h, 42h, 43h 44h, 47h and 48h are available
11DRIVE_LOCKING_AND_EJECTING_SUPPORT  EQU (1<<1)  ; 41h, 45h, 46h, 48h, 49h are available and INT 15h, AH=52h
12ENHANCED_DISK_DRIVE_SUPPORT         EQU (1<<2)  ; 41h, 48h, 4Eh are available (EDD)
13
14
15; Extended Drive Information returned by AH=48h
16struc EDRIVE_INFO
17    .wSize                  resb    2   ; 0, Size of this buffer, at least 26
18    .wFlags                 resb    2   ; 2, Information flags
19    .dwCylinders            resb    4   ; 4, Total number of addressable cylinders
20    .dwHeads                resb    4   ; 8, Total number of addressable heads
21    .dwSectorsPerTrack      resb    4   ; 12, Number of sectors per track
22    .qwTotalSectors         resb    8   ; 16, Total number of addressable sectors
23    .wSectorSize            resb    2   ; 24, Number of bytes per sector
24    .fpEDDparams            resb    8   ; 26, Optional pointer to Enhanced Disk Drive (EDD) configuration parameters
25endstruc
26
27MINIMUM_EDRIVEINFO_SIZE     EQU     26  ; 26 bytes does not include EDD pointer
28
29; Flags for EDRIVE_INFO.wFlags
30FLG_DMA_BOUNDARY_ERRORS_HANDLED_BY_BIOS             EQU (1<<0)
31FLG_CHS_INFORMATION_IS_VALID                        EQU (1<<1)
32FLG_REMOVABLE_DRIVE                                 EQU (1<<2)
33FLG_WRITE_WITH_VERIFY_SUPPORTED                     EQU (1<<3)
34FLG_CHANGE_LINE_SUPPORT                             EQU (1<<4)  ; Removable media only
35FLG_LOCKABLE                                        EQU (1<<5)  ; Removable media only
36FLG_NO_MEDIA_PRESENT_AND_CHS_SET_TO_MAX             EQU (1<<6)  ; Removable media only
37
38
39; Disk Address Packet for read, write and verify functions
40struc DAP
41    .bSize                  resb    1   ; 0, Size of this packet in bytes
42    .bReservedAt1           resb    1   ; 1, Currently unused, must be zero
43    .bSectorCount           resb    1   ; 2, Number of sectors to process (0...127)
44    .bReservedAt3           resb    1   ; 3, Currently unused, must be zero
45    .dwMemoryAddress:
46    .wOffset                resb    2   ; 4, Memory offset for transfer
47    .wSegment               resb    2   ; 6, Memory segment for transfer
48    .qwLBA                  resb    8   ; 8, Starting sector for transfer
49endstruc
50
51MINIMUM_DAP_SIZE            EQU     16
52
53
54%endif ; EBIOS_INC
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