| 1 | ; Project name : XTIDE Universal BIOS |
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| 2 | ; Description : Int 13h function AH=4h, Verify Disk Sectors. |
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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=4h, Verify Disk Sectors. |
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| 9 | ; |
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| 10 | ; AH4h_HandlerForVerifyDiskSectors |
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| 11 | ; Parameters: |
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| 12 | ; AL, CX, DH: Same as in INTPACK |
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| 13 | ; DL: Translated Drive number |
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| 14 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 15 | ; SS:BP: Ptr to INTPACK |
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| 16 | ; Parameters on INTPACK in SS:BP: |
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| 17 | ; AL: Number of sectors to verify |
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| 18 | ; CH: Cylinder number, bits 7...0 |
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| 19 | ; CL: Bits 7...6: Cylinder number bits 9 and 8 |
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| 20 | ; Bits 5...0: Starting sector number (1...63) |
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| 21 | ; DH: Starting head number (0...255) |
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| 22 | ; Returns with INTPACK in SS:BP: |
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| 23 | ; AH: Int 13h/40h floppy return status |
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| 24 | ; CF: 0 if successfull, 1 if error |
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| 25 | ;-------------------------------------------------------------------- |
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| 26 | ALIGN JUMP_ALIGN |
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| 27 | AH4h_HandlerForVerifyDiskSectors: |
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| 28 | test al, al ; Invalid sector count? |
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| 29 | jz SHORT AH2h_ZeroCntErr ; If so, return with error |
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| 30 | |
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| 31 | mov ah, HCMD_VERIFY_SECT ; Load command to AH |
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| 32 | call HCommand_OutputCountAndLCHSandCommand |
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| 33 | jc SHORT .ReturnWithErrorCodeInAH |
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| 34 | mov bx, di ; DS:BX now points to DPT |
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| 35 | call HStatus_WaitIrqOrRdy ; Wait for IRQ or RDY |
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| 36 | .ReturnWithErrorCodeInAH: |
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| 37 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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