| 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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