source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Inc/CompatibleDPT.inc @ 541

Last change on this file since 541 was 541, checked in by aitotat@…, 11 years ago

Changes to XTIDE Universal BIOS:

  • Brought back compatible DPTs.
File size: 4.3 KB
Line 
1; Project name  :   XTIDE Universal BIOS
2; Description   :   Defines for DPT structs to present drive geometry
3;                   to ill behaving applications that want
4;                   to read DPT from interrupt vectors 41h and 46h.
5
6;
7; XTIDE Universal BIOS and Associated Tools
8; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
9;
10; This program is free software; you can redistribute it and/or modify
11; it under the terms of the GNU General Public License as published by
12; the Free Software Foundation; either version 2 of the License, or
13; (at your option) any later version.
14;
15; This program is distributed in the hope that it will be useful,
16; but WITHOUT ANY WARRANTY; without even the implied warranty of
17; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18; GNU General Public License for more details.
19; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
20;
21
22%ifndef COMPATIBLE_DPT
23%define COMPATIBLE_DPT
24
25; Standard DPT for small drives with 1024 or less cylinders
26struc STANDARD_DPT
27    .wPchsCylinders     resb    2   ; 0-1, Physical number of cylinders
28    .bPchsHeads         resb    1   ; 2, Physical number of heads
29    .bReserved3to4      resb    2   ; 3-4, Reserved
30    .wPrecompCylinder   resb    2   ; 5-6, Write Precompensation Cylinder
31    .bReserved7         resb    1   ; 7, Reserved
32    .bDrvControlByte    resb    1   ; 8, Drive Control Byte
33    .bReserved9to11     resb    3   ; 9-11, Reserved
34    .wLandingZone       resb    2   ; 12-13, Landing Zone Cylinder
35    .bPchsSectPerTrack  resb    1   ; 14, Physical sectors per track
36    .bReserved15        resb    1   ; 15, Reserved
37endstruc
38
39
40; Translated DPT for drives with more than 1024 cylinders
41struc TRANSLATED_DPT
42    .wLchsCylinders     resb    2   ; 0-1, Logical number of cylinders
43    .bLchsHeads         resb    1   ; 2, Logical number of heads
44    .bSignature         resb    1   ; 3, Axh signature to indicate Translated DPT
45    .bPchsSectPerTrack  resb    1   ; 4, Physical sectors per track
46    .wPrecompCylinder   resb    2   ; 5-6, Write Precompensation Cylinder
47    .bReserved7         resb    1   ; 7, Reserved
48    .bDrvControlByte    resb    1   ; 8, Drive Control Byte
49    .wPchsCylinders     resb    2   ; 9-10, Physical number of cylinders
50    .bPchsHeads         resb    1   ; 11, Physical number of heads
51    .wLandingZone       resb    2   ; 12-13, Landing Zone Cylinder
52    .bLchsSectPerTrack  resb    1   ; 14, Logical sectors per track
53    .bChecksum          resb    1   ; 15, Checksum: 2's complement of the 8-bit unsigned sum of bytes 0-14
54endstruc
55
56TRANSLATED_DPT_SIGNATURE    EQU     0A0h
57
58
59; Device Parameter Table Extension (returned by AH=48h EBIOS function)
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 if 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 addresses 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%endif ; COMPATIBLE_DPT
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