1 | ; Project name : XTIDE Universal BIOS
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2 | ; Description : Int 13h function AH=24h, Set Multiple Blocks.
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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, 2011-2012 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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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=24h, Set Multiple Blocks.
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25 | ;
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26 | ; AH24h_HandlerForSetMultipleBlocks
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27 | ; Parameters:
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28 | ; AL: 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 | ; AL: Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128)
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34 | ; Returns with INTPACK:
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35 | ; AH: Int 13h return status
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36 | ; CF: 0 if successful, 1 if error
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37 | ;--------------------------------------------------------------------
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38 | AH24h_HandlerForSetMultipleBlocks:
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39 | %ifndef USE_186
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40 | call AH24h_SetBlockSize
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41 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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42 | %else
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43 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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44 | ; Fall to AH24h_SetBlockSize
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45 | %endif
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46 |
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47 |
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48 | ;--------------------------------------------------------------------
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49 | ; AH24h_SetBlockSize
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50 | ; Parameters:
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51 | ; AL: Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128)
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52 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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53 | ; SS:BP: Ptr to IDEPACK
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54 | ; Returns:
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55 | ; AH: Int 13h return status
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56 | ; CF: 0 if successful, 1 if error
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57 | ; Corrupts registers:
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58 | ; AL, CX, DX
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59 | ;--------------------------------------------------------------------
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60 | AH24h_SetBlockSize:
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61 | %ifdef MODULE_8BIT_IDE
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62 | ; XT-CF does not support largest block size in DMA mode.
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63 | cmp al, XTCF_DMA_MODE_MAX_BLOCK_SIZE
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64 | jbe SHORT .NoNeedToLimitBlockSize
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65 | cmp BYTE [di+DPT_ATA.bDevice], DEVICE_8BIT_XTCF_DMA
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66 | je SHORT AH1Eh_LoadInvalidCommandToAHandSetCF
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67 | .NoNeedToLimitBlockSize:
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68 | %endif ; MODULE_8BIT_IDE
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69 |
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70 | push bx
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71 |
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72 | push ax
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73 | xchg dx, ax ; DL = Block size (Sector Count Register)
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74 | mov al, COMMAND_SET_MULTIPLE_MODE
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75 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY)
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76 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL
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77 | pop bx
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78 | jnc SHORT .StoreBlockSize
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79 | mov bl, 1 ; Block size 1 will always work
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80 | .StoreBlockSize: ; Store new block size to DPT and return
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81 | mov [di+DPT_ATA.bBlockSize], bl
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82 |
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83 | pop bx
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84 | ret
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