1 | ; Project name : XTIDE Universal BIOS |
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2 | ; Description : Int 13h function AH=47h, Extended Seek. |
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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=47h, Extended Seek. |
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9 | ; |
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10 | ; AH47h_HandlerForExtendedSeek |
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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 | ;-------------------------------------------------------------------- |
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22 | ALIGN JUMP_ALIGN |
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23 | AH47h_HandlerForExtendedSeek: |
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24 | ; Note that there is no Seek command for LBA48 addressing! |
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25 | mov es, [bp+IDEPACK.intpack+INTPACK.ds] ; ES:SI to point Disk Address Packet |
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26 | cmp BYTE [es:si+DAP.bSize], MINIMUM_DAP_SIZE |
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27 | jb SHORT AH42h_ReturnWithInvalidFunctionError |
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28 | |
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29 | mov ah, COMMAND_SEEK |
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30 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRDY) |
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31 | %ifdef USE_186 |
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32 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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33 | jmp Idepack_ConvertDapToIdepackAndIssueCommandFromAH |
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34 | %else |
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35 | call Idepack_ConvertDapToIdepackAndIssueCommandFromAH |
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36 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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37 | %endif |
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