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 |
---|
26 | struc 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 |
---|
37 | endstruc |
---|
38 | |
---|
39 | |
---|
40 | ; Translated DPT for drives with more than 1024 cylinders |
---|
41 | struc 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 |
---|
54 | endstruc |
---|
55 | |
---|
56 | TRANSLATED_DPT_SIGNATURE EQU 0A0h |
---|
57 | |
---|
58 | |
---|
59 | ; Device Parameter Table Extension (returned by AH=48h EBIOS function) |
---|
60 | struc 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 |
---|
73 | endstruc |
---|
74 | |
---|
75 | ; Flags for DPTE.wFlags |
---|
76 | FLG_FAST_PIO_ENABLED EQU (1<<0) ; Set if using PIO mode 1 or above (DPTE.bPioMode is valid when set) |
---|
77 | FLG_DMA_ENABLED EQU (1<<1) ; Set if DMA enabled (DPTE.bDmaChannelAndType is valid when set) |
---|
78 | FLG_BLOCK_MODE_ENABLED EQU (1<<2) ; Set if Block Mode transfers are enabled (DPTE.bBlockSize is valid when set) |
---|
79 | FLG_CHS_TRANSLATION_ENABLED EQU (1<<3) ; Set for drives with more than 1024 cylinders |
---|
80 | FLG_LBA_TRANSLATION_ENABLED EQU (1<<4) ; Set when LBA addresses from DAP are passed directly to the drive |
---|
81 | FLG_REMOVABLE_MEDIA EQU (1<<5) |
---|
82 | FLG_ATAPI_DEVICE EQU (1<<6) |
---|
83 | FLG_32BIT_XFER_MODE EQU (1<<7) ; Set when using 32-bit data transfers |
---|
84 | FLG_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) |
---|
86 | MASK_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 | |
---|
94 | DPTE_REVISION EQU 11h |
---|
95 | |
---|
96 | |
---|
97 | %endif ; COMPATIBLE_DPT |
---|