Last change
on this file since 116 was
116,
checked in by krille_n_@…, 13 years ago
|
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.
|
File size:
901 bytes
|
Rev | Line | |
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[116] | 1 | ; Project name : XTIDE Universal BIOS |
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[3] | 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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[28] | 26 | |
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[3] | 27 | LOAD_BDA_SEGMENT_TO ds, di |
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[35] | 28 | mov ah, [BDA.bHDLastSt] ; Last error to AH |
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[116] | 29 | cmp ah, 1 ; Set CF if error code is zero |
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| 30 | cmc ; Invert CF |
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[28] | 31 | |
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[3] | 32 | pop ds |
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| 33 | jmp Int13h_PopDiDsAndReturn |
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