| 1 | ; Project name : XTIDE Universal BIOS
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| 2 | ; Description : Int 13h function AH=42h, Extended Read 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=42h, Extended Read Sectors.
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| 9 | ;
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| 10 | ; AH42h_HandlerForExtendedReadSectors
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| 11 | ; Parameters:
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| 12 | ; SI: 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 IDEPACK
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| 16 | ; Parameters on INTPACK:
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| 17 | ; DS:SI: Ptr to Disk Address Packet
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| 18 | ; Returns with INTPACK:
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| 19 | ; AH: Int 13h return status
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| 20 | ; CF: 0 if successful, 1 if error
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| 21 | ; Return with Disk Address Packet in INTPACK:
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| 22 | ; .wSectorCount Number of sectors read successfully
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| 23 | ;--------------------------------------------------------------------
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| 24 | ALIGN JUMP_ALIGN
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| 25 | AH42h_HandlerForExtendedReadSectors:
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| 26 | call Prepare_ByLoadingDapToESSIandVerifyingForTransfer
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| 27 | mov ah, [cs:bx+g_rgbReadCommandLookup]
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| 28 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ)
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| 29 | call Idepack_ConvertDapToIdepackAndIssueCommandFromAH
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| 30 | ; Fall to AH42h_ReturnFromInt13hAfterStoringErrorCodeFromAHandTransferredSectorsFromCX
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| 31 |
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| 32 |
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| 33 | ;--------------------------------------------------------------------
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| 34 | ; AH42h_ReturnFromInt13hAfterStoringErrorCodeFromAHandTransferredSectorsFromCX
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| 35 | ; Parameters:
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| 36 | ; AH: INT 13h Error Code
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| 37 | ; CX: Number of successfully transferred sectors
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| 38 | ; SS:BP: Ptr to IDEPACK
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| 39 | ; Returns:
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| 40 | ; Nothing, jumps to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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| 41 | ; Corrupts registers:
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| 42 | ; SI, DS
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| 43 | ;--------------------------------------------------------------------
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| 44 | AH42h_ReturnFromInt13hAfterStoringErrorCodeFromAHandTransferredSectorsFromCX:
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| 45 | mov ds, [bp+IDEPACK.intpack+INTPACK.ds]
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| 46 | mov si, [bp+IDEPACK.intpack+INTPACK.si]
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| 47 | mov [si+DAP.wSectorCount], cx
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| 48 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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