[148] | 1 | ; Project name : XTIDE Universal BIOS |
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[3] | 2 | ; Description : Int 13h function AH=4h, Verify Disk Sectors. |
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| 3 | |
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[376] | 4 | ; |
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[526] | 5 | ; XTIDE Universal BIOS and Associated Tools |
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| 6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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[376] | 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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[526] | 12 | ; |
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[376] | 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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[526] | 16 | ; GNU General Public License for more details. |
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[376] | 17 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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[526] | 18 | ; |
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[376] | 19 | |
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[3] | 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=4h, Verify Disk Sectors. |
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| 25 | ; |
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| 26 | ; AH4h_HandlerForVerifyDiskSectors |
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| 27 | ; Parameters: |
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[148] | 28 | ; AL, CX, DH: 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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[617] | 31 | ; SS:BP: Ptr to IDEPACK |
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[148] | 32 | ; Parameters on INTPACK in SS:BP: |
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[221] | 33 | ; AL: Number of sectors to verify (1...128) |
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[3] | 34 | ; CH: Cylinder number, bits 7...0 |
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| 35 | ; CL: Bits 7...6: Cylinder number bits 9 and 8 |
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| 36 | ; Bits 5...0: Starting sector number (1...63) |
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| 37 | ; DH: Starting head number (0...255) |
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[148] | 38 | ; Returns with INTPACK in SS:BP: |
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[3] | 39 | ; AH: Int 13h/40h floppy return status |
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[568] | 40 | ; AL: Number of sectors actually verified (only valid if CF set for some BIOSes) |
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[294] | 41 | ; CF: 0 if successful, 1 if error |
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[3] | 42 | ;-------------------------------------------------------------------- |
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| 43 | ALIGN JUMP_ALIGN |
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| 44 | AH4h_HandlerForVerifyDiskSectors: |
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[155] | 45 | mov ah, COMMAND_VERIFY_SECTORS |
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[332] | 46 | call Prepare_ByValidatingSectorsInALforOldInt13h ; Preserves AX |
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[150] | 47 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRDY) |
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[617] | 48 | push ax ; Store number of sectors to verify |
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[150] | 49 | call Idepack_TranslateOldInt13hAddressAndIssueCommandFromAH |
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[617] | 50 | pop cx ; Number of sectors verified if successful |
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| 51 | jnc SHORT .NoErrors |
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| 52 | |
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| 53 | ; TODO: For now we assume serial device do not produce verify errors |
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| 54 | call AH4h_CalculateNumberOfSuccessfullyVerifiedSectors |
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| 55 | .NoErrors: |
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[249] | 56 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAHandTransferredSectorsFromCL |
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[617] | 57 | |
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| 58 | |
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| 59 | ;-------------------------------------------------------------------- |
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| 60 | ; Calculates number of succesfully verified sectors. This function works only |
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| 61 | ; if verify command stopped to an device error (such as bad sector) since IDE |
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| 62 | ; register contents are not valid unless error. |
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| 63 | ; |
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| 64 | ; AH4h_CalculateNumberOfSuccessfullyVerifiedSectors |
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| 65 | ; Parameters: |
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| 66 | ; AH: INT 13h error code |
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[618] | 67 | ; CX: Number of sectors that was meant to be verified |
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[617] | 68 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| 69 | ; SS:BP: Ptr to IDEPACK |
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| 70 | ; Returns with INTPACK in SS:BP: |
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| 71 | ; CX: Number of sectors succesfully verified |
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| 72 | ; CF: 1 |
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| 73 | ;-------------------------------------------------------------------- |
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| 74 | ALIGN JUMP_ALIGN |
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| 75 | AH4h_CalculateNumberOfSuccessfullyVerifiedSectors: |
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[618] | 76 | xchg cx, ax ; Store error code to CH |
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[617] | 77 | call Device_ReadLBAlowRegisterToAL |
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[618] | 78 | sub al, [bp+IDEPACK.bLbaLow] ; AL = sector address with verify failure - starting sector address |
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[617] | 79 | xor ah, ah |
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[618] | 80 | xchg cx, ax ; Number of successfully verified sectors in CX, error code in AH |
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[617] | 81 | stc |
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| 82 | ret |
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