1 | ; Project name : XTIDE Universal BIOS |
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2 | ; Description : Int 13h function AH=4h, Verify Disk Sectors. |
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3 | |
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4 | ; |
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5 | ; XTIDE Universal BIOS and Associated Tools |
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6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 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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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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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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31 | ; SS:BP: Ptr to IDEPACK |
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32 | ; Parameters on INTPACK in SS:BP: |
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33 | ; AL: Number of sectors to verify (1...128) |
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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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38 | ; Returns with INTPACK in SS:BP: |
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39 | ; AH: Int 13h/40h floppy return status |
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40 | ; AL: Number of sectors actually verified (only valid if CF set for some BIOSes) |
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41 | ; CF: 0 if successful, 1 if error |
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42 | ;-------------------------------------------------------------------- |
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43 | ALIGN JUMP_ALIGN |
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44 | AH4h_HandlerForVerifyDiskSectors: |
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45 | mov ah, COMMAND_VERIFY_SECTORS |
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46 | call Prepare_ByValidatingSectorsInALforOldInt13h ; Preserves AX |
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47 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRQ, FLG_STATUS_DRDY) |
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48 | push ax ; Store number of sectors to verify |
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49 | call Idepack_TranslateOldInt13hAddressAndIssueCommandFromAH |
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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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56 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAHandTransferredSectorsFromCL |
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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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67 | ; CX: Number of sectors that was meant to we verified |
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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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76 | xchg cx, ax ; Store error code to CL |
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77 | call Device_ReadLBAlowRegisterToAL |
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78 | mov ah, [bp+IDEPACK.bLbaLow] |
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79 | sub al, ah ; AL = sector address with verify failure - starting sector address |
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80 | xor ah, ah |
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81 | xchg cx, ax ; Number of successfully verified sectors in CX, error code in AH |
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82 | stc |
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83 | ret |
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