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