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 succesfull, 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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