source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/EBIOS.inc @ 535

Last change on this file since 535 was 535, checked in by aitotat@…, 9 years ago

Changes to XTIDE Universal BIOS:

  • AH=48h now returns Device Parameter Table Extension when RETURN_DPTE_ON_AH48H is defined.
  • Removed few unnecessary instructions from hardware interrupt handler.
  • P-Cylinders returned by AH=48h are no longer calculated from L-CHS capacity.
File size: 4.7 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
48
49; Flags for EDRIVE_INFO.wFlags
50FLG_DMA_BOUNDARY_ERRORS_HANDLED_BY_BIOS             EQU (1<<0)
51FLG_CHS_INFORMATION_IS_VALID                        EQU (1<<1)
52FLG_REMOVABLE_DRIVE                                 EQU (1<<2)
53FLG_WRITE_WITH_VERIFY_SUPPORTED                     EQU (1<<3)
54FLG_CHANGE_LINE_SUPPORT                             EQU (1<<4)  ; Removable media only
55FLG_LOCKABLE                                        EQU (1<<5)  ; Removable media only
56FLG_NO_MEDIA_PRESENT_AND_CHS_SET_TO_MAX             EQU (1<<6)  ; Removable media only
57
58
59; Device Parameter Table Extension
60struc DPTE
61    .wBasePort              resb    2   ; 0, Command Block Base Port Address
62    .wControlBlockPort      resb    2   ; 2, Control Block Base Port Address
63    .bDrvnhead              resb    1   ; 4, Drive and Head Select Register upper nibble
64    .bBiosVendor            resb    1   ; 5, BIOS Vendor Specific
65    .bIRQ                   resb    1   ; 6, IRQ for this device
66    .bBlockSize             resb    1   ; 7, Current block size in sectors
67    .bDmaChannelAndType     resb    1   ; 8, DMA information
68    .bPioMode               resb    1   ; 9, PIO mode
69    .wFlags                 resb    2   ; 10, BIOS selected hardware specific option flags
70    .wReserved              resb    2   ; 12, Reserved. Must be zero.
71    .bRevision              resb    1   ; 14, Revision level of this table (11h)
72    .bChecksum              resb    1   ; 15, Checksum, 2's complement of the sum of bytes 0-14
73endstruc
74
75; Flags for DPTE.wFlags
76FLG_FAST_PIO_ENABLED        EQU (1<<0)  ; Set is using PIO mode 1 or above (DPTE.bPioMode is valid when set)
77FLG_DMA_ENABLED             EQU (1<<1)  ; Set if DMA enabled (DPTE.bDmaChannelAndType is valid when set)
78FLG_BLOCK_MODE_ENABLED      EQU (1<<2)  ; Set if Block Mode transfers are enabled (DPTE.bBlockSize is valid when set)
79FLG_CHS_TRANSLATION_ENABLED EQU (1<<3)  ; Set for drives with more than 1024 cylinders
80FLG_LBA_TRANSLATION_ENABLED EQU (1<<4)  ; Set when LBA addersses from DAP are passed directly to the drive
81FLG_REMOVABLE_MEDIA         EQU (1<<5)
82FLG_ATAPI_DEVICE            EQU (1<<6)
83FLG_32BIT_XFER_MODE         EQU (1<<7)  ; Set when using 32-bit data transfers
84FLG_ATAPI_USES_IRQ          EQU (1<<8)  ; ATAPI Device uses IRQ for data transfers
85; L-CHS translation type for old INT 13h (when FLG_CHS_TRANSLATION_ENABLED is set)
86MASK_CHS_TRANSLATION_TYPE   EQU (3<<TRANSLATION_TYPE_FIELD_POSITION)
87    TRANSLATION_TYPE_FIELD_POSITION EQU 9
88    BIT_SHIFT_TRANSLATION           EQU 0   ; LARGE
89    LBA_ASSISTED_TRANSLATION        EQU 1   ; Assisted LBA
90                                        ; 2 = reserved
91    VENDOR_SPECIFIC_TRANSLATION     EQU 3
92
93
94DPTE_REVISION               EQU     11h
95
96
97; Disk Address Packet for read, write and verify functions
98struc DAP
99    .bSize                  resb    1   ; 0, Size of this packet in bytes
100    .bReservedAt1           resb    1   ; 1, Currently unused, must be zero
101    .wSectorCount           resb    2   ; 2, Number of sectors to process (0...127)
102    .dwMemoryAddress:
103    .wOffset                resb    2   ; 4, Memory offset for transfer
104    .wSegment               resb    2   ; 6, Memory segment for transfer
105    .qwLBA                  resb    8   ; 8, Starting sector for transfer
106endstruc
107
108MINIMUM_DAP_SIZE            EQU     16
109
110
111%endif ; EBIOS_INC
Note: See TracBrowser for help on using the repository browser.