1 | ; File name : CompatibleDPT.inc |
---|
2 | ; Project name : IDE BIOS |
---|
3 | ; Created date : 6.4.2010 |
---|
4 | ; Last update : 6.4.2010 |
---|
5 | ; Author : Tomi Tilli |
---|
6 | ; Description : Structs for standard DPTs used for software |
---|
7 | ; compatibility. |
---|
8 | %ifndef COMPATIBLEDPT_INC |
---|
9 | %define COMPATIBLEDPT_INC |
---|
10 | |
---|
11 | ; Fixed Disk Parameter table used for drives with capacity up to 504 MiB |
---|
12 | struc COMPATIBLE_FDPT |
---|
13 | .wCyls resb 2 ; 0, Maximum number of cylinders |
---|
14 | .bHeads resb 1 ; 2, Maximum number of heads |
---|
15 | .wRedWrCyl resb 2 ; 3, Starting cylinder for reduced write current (MFM) |
---|
16 | .wWrPreCmpCyl resb 2 ; 5, Starting write precompensation cylinder (MFM) |
---|
17 | .bMaxECCLen resb 1 ; 7, Maximum ECC data burst length (MFM) |
---|
18 | .bDrvCtrl resb 1 ; 8, Control Byte |
---|
19 | .bNormTimeout resb 1 ; 9, Normal timeout value |
---|
20 | .bFormatTimeout resb 1 ; 10, Timeout value for format disk drive |
---|
21 | .bCheckTimeout resb 1 ; 11, Timeout value for check disk drive |
---|
22 | .wLZoneCyl resb 2 ; 12, Landing zone cylinder |
---|
23 | .bSectPerTrack resb 1 ; 14, Number of sectors per track |
---|
24 | resb 1 ; 15, unused |
---|
25 | endstruc |
---|
26 | |
---|
27 | |
---|
28 | ; Fixed Disk Parameter table used for drives with P-CHS or LBA addressing |
---|
29 | struc COMPATIBLE_EDPT |
---|
30 | .wLCyls resb 2 ; 0, L-CHS cylinders (1...1024) |
---|
31 | .bLHeads resb 1 ; 2, L-CHS heads (1...255) |
---|
32 | .bSignature resb 1 ; 3, EDPT signature (A0h) |
---|
33 | .bPSect resb 1 ; 4, P-CHS sectors per track (1...63) |
---|
34 | resb 3 ; 5...7, unused |
---|
35 | .bDrvCtrl resb 1 ; 8, Control Byte |
---|
36 | .wPCyls resb 2 ; 9, P-CHS cylinders (1...16383) |
---|
37 | .bPHeads resb 1 ; 11, P-CHS heads (1...16) |
---|
38 | resb 2 ; 12...13, unused |
---|
39 | .bLSect resb 1 ; 14, L-CHS sectors per track (1...63) |
---|
40 | .bChecksum resb 1 ; 15, Checksum of bytes 0 to 14 |
---|
41 | endstruc |
---|
42 | |
---|
43 | COMPATIBLE_EDPT_SIGNATURE EQU 0A0h |
---|
44 | |
---|
45 | |
---|
46 | %endif ; COMPATIBLEDPT_INC |
---|