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Last change
on this file since 139 was 116, checked in by krille_n_@…, 14 years ago |
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Changes to all parts of the project:
- Removed a redundant macro (HPIO_NORMALIZE_PTR)
- Deleted XTIDE_Universal_BIOS/Inc/BiosData.inc since that was also redundant.
- Size optimization: Changed the LOAD_BDA_SEGMENT_TO macro to use the stack on 186+ processors (the old behaviour can still be used where needed).
- Made other minor size optimizations and cleanups to various functions, mostly in the Int13h handler.
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File size:
901 bytes
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| 1 | ; Project name : XTIDE Universal BIOS
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| 2 | ; Description : Int 13h function AH=1h, Read Disk Status.
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| 3 |
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| 4 | ; Section containing code
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| 5 | SECTION .text
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| 6 |
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| 7 | ;--------------------------------------------------------------------
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| 8 | ; Int 13h function AH=1h, Read Disk Status.
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| 9 | ;
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| 10 | ; AH1h_HandlerForReadDiskStatus
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| 11 | ; Parameters:
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| 12 | ; AH: Bios function 1h
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| 13 | ; DL: Drive number (8xh)
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| 14 | ; Parameters loaded by Int13h_Jump:
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| 15 | ; DS: RAMVARS segment
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| 16 | ; Returns:
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| 17 | ; AH: Int 13h floppy return status
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| 18 | ; CF: 0 if AH = RET_HD_SUCCESS, 1 otherwise (error)
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| 19 | ; IF: 1
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| 20 | ; Corrupts registers:
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| 21 | ; Flags
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| 22 | ;--------------------------------------------------------------------
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| 23 | ALIGN JUMP_ALIGN
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| 24 | AH1h_HandlerForReadDiskStatus:
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| 25 | push ds
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| 26 |
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| 27 | LOAD_BDA_SEGMENT_TO ds, di
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| 28 | mov ah, [BDA.bHDLastSt] ; Last error to AH
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| 29 | cmp ah, 1 ; Set CF if error code is zero
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| 30 | cmc ; Invert CF
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| 31 |
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| 32 | pop ds
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| 33 | jmp Int13h_PopDiDsAndReturn
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