[148] | 1 | ; Project name : XTIDE Universal BIOS |
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[3] | 2 | ; Description : Int 13h function AH=24h, Set Multiple Blocks. |
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| 3 | |
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[376] | 4 | ; |
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[491] | 5 | ; XTIDE Universal BIOS and Associated Tools |
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[526] | 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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[491] | 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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[491] | 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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[491] | 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=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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[148] | 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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[150] | 31 | ; SS:BP: Ptr to IDEPACK |
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| 32 | ; Parameters on INTPACK: |
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[3] | 33 | ; AL: Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128) |
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[150] | 34 | ; Returns with INTPACK: |
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[3] | 35 | ; AH: Int 13h return status |
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[294] | 36 | ; CF: 0 if successful, 1 if error |
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[3] | 37 | ;-------------------------------------------------------------------- |
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| 38 | AH24h_HandlerForSetMultipleBlocks: |
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[84] | 39 | %ifndef USE_186 |
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[3] | 40 | call AH24h_SetBlockSize |
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[148] | 41 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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[84] | 42 | %else |
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[148] | 43 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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[162] | 44 | ; Fall to AH24h_SetBlockSize |
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[84] | 45 | %endif |
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[3] | 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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[148] | 52 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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[150] | 53 | ; SS:BP: Ptr to IDEPACK |
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[3] | 54 | ; Returns: |
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| 55 | ; AH: Int 13h return status |
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[294] | 56 | ; CF: 0 if successful, 1 if error |
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[3] | 57 | ; Corrupts registers: |
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[365] | 58 | ; AL, CX, DX |
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[3] | 59 | ;-------------------------------------------------------------------- |
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| 60 | AH24h_SetBlockSize: |
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[493] | 61 | %ifdef MODULE_8BIT_IDE_ADVANCED |
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[473] | 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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[491] | 64 | jbe SHORT .NoNeedToLimitBlockSize |
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[545] | 65 | |
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| 66 | ; Return error if we tried too large block for XT-CF. |
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| 67 | ; Do not limit it to maximum supported since software calling AH=24h |
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| 68 | ; must know what the actual block size is. |
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[491] | 69 | cmp BYTE [di+DPT_ATA.bDevice], DEVICE_8BIT_XTCF_DMA |
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[550] | 70 | je SHORT .DisableBlockMode |
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[473] | 71 | .NoNeedToLimitBlockSize: |
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[493] | 72 | %endif ; MODULE_8BIT_IDE_ADVANCED |
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[473] | 73 | |
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[365] | 74 | push bx |
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| 75 | |
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[550] | 76 | push ax ; Store block size for later use |
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[365] | 77 | xchg dx, ax ; DL = Block size (Sector Count Register) |
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[150] | 78 | mov al, COMMAND_SET_MULTIPLE_MODE |
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| 79 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY) |
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| 80 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL |
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[545] | 81 | |
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[550] | 82 | ; Disable block mode if failure or if called with block size of 1 sector. |
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| 83 | ; Some drives allow block mode commands for 1 sector blocks and some do not. |
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| 84 | pop bx ; Pop block size to BL |
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| 85 | jc SHORT .DisableBlockMode |
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| 86 | mov bh, bl ; BL and BH both have block size we tried to set |
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| 87 | dec bh |
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| 88 | jz SHORT .DisableBlockMode |
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| 89 | |
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| 90 | ; Enable block mode and store block size |
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| 91 | or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_USE_BLOCK_MODE_COMMANDS |
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| 92 | jmp SHORT .StoreBlockSizeFromBLandReturn |
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| 93 | |
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| 94 | .DisableBlockMode: |
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| 95 | and BYTE [di+DPT.bFlagsHigh], ~FLGH_DPT_USE_BLOCK_MODE_COMMANDS |
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| 96 | mov bl, 1 |
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| 97 | stc |
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| 98 | .StoreBlockSizeFromBLandReturn: |
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[365] | 99 | mov [di+DPT_ATA.bBlockSize], bl |
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| 100 | pop bx |
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[3] | 101 | ret |
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