[165] | 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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[376] | 4 | ; |
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| 5 | ; XTIDE Universal BIOS and Associated Tools |
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| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team. |
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| 7 | ; |
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| 8 | ; This program is free software; you can redistribute it and/or modify |
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| 9 | ; it under the terms of the GNU General Public License as published by |
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| 10 | ; the Free Software Foundation; either version 2 of the License, or |
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| 11 | ; (at your option) any later version. |
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| 12 | ; |
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| 13 | ; This program is distributed in the hope that it will be useful, |
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| 14 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | ; GNU General Public License for more details. |
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| 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 18 | ; |
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| 19 | |
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[165] | 20 | ; Section containing code |
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| 21 | SECTION .text |
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| 22 | |
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| 23 | ;-------------------------------------------------------------------- |
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| 24 | ; Int 13h function AH=42h, Extended Read Sectors. |
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| 25 | ; |
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| 26 | ; AH42h_HandlerForExtendedReadSectors |
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| 27 | ; Parameters: |
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| 28 | ; SI: Same as in INTPACK |
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| 29 | ; DL: Translated Drive number |
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| 30 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 31 | ; SS:BP: Ptr to IDEPACK |
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| 32 | ; Parameters on INTPACK: |
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| 33 | ; DS:SI: Ptr to Disk Address Packet |
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| 34 | ; Returns with INTPACK: |
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| 35 | ; AH: Int 13h return status |
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[294] | 36 | ; CF: 0 if successful, 1 if error |
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[165] | 37 | ; Return with Disk Address Packet in INTPACK: |
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[249] | 38 | ; .wSectorCount Number of sectors read successfully |
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[165] | 39 | ;-------------------------------------------------------------------- |
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| 40 | ALIGN JUMP_ALIGN |
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| 41 | AH42h_HandlerForExtendedReadSectors: |
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[221] | 42 | call Prepare_ByLoadingDapToESSIandVerifyingForTransfer |
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[165] | 43 | mov ah, [cs:bx+g_rgbReadCommandLookup] |
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| 44 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRQ) |
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| 45 | call Idepack_ConvertDapToIdepackAndIssueCommandFromAH |
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[249] | 46 | ; Fall to AH42h_ReturnFromInt13hAfterStoringErrorCodeFromAHandTransferredSectorsFromCX |
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| 47 | |
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| 48 | |
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| 49 | ;-------------------------------------------------------------------- |
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| 50 | ; AH42h_ReturnFromInt13hAfterStoringErrorCodeFromAHandTransferredSectorsFromCX |
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| 51 | ; Parameters: |
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| 52 | ; AH: INT 13h Error Code |
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| 53 | ; CX: Number of successfully transferred sectors |
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| 54 | ; SS:BP: Ptr to IDEPACK |
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| 55 | ; Returns: |
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| 56 | ; Nothing, jumps to Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| 57 | ; Corrupts registers: |
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| 58 | ; SI, DS |
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| 59 | ;-------------------------------------------------------------------- |
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| 60 | AH42h_ReturnFromInt13hAfterStoringErrorCodeFromAHandTransferredSectorsFromCX: |
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| 61 | mov ds, [bp+IDEPACK.intpack+INTPACK.ds] |
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| 62 | mov si, [bp+IDEPACK.intpack+INTPACK.si] |
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| 63 | mov [si+DAP.wSectorCount], cx |
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[165] | 64 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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