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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