| [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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| 4 | ; Section containing code |
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| 5 | SECTION .text |
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| 6 | |
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| 7 | ;-------------------------------------------------------------------- |
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| 8 | ; Int 13h function AH=24h, Set Multiple Blocks. |
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| 9 | ; |
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| 10 | ; AH24h_HandlerForSetMultipleBlocks |
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| 11 | ; Parameters: |
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| [148] | 12 | ; AL: Same as in INTPACK |
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| 13 | ; DL: Translated Drive number |
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| 14 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| [150] | 15 | ; SS:BP: Ptr to IDEPACK |
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| 16 | ; Parameters on INTPACK: |
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| [3] | 17 | ; AL: Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128) |
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| [150] | 18 | ; Returns with INTPACK: |
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| [3] | 19 | ; AH: Int 13h return status |
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| 20 | ; CF: 0 if succesfull, 1 if error |
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| 21 | ;-------------------------------------------------------------------- |
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| 22 | ALIGN JUMP_ALIGN |
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| 23 | AH24h_HandlerForSetMultipleBlocks: |
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| [150] | 24 | test WORD [di+DPT.wFlags], FLG_DPT_BLOCK_MODE_SUPPORTED |
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| 25 | jnz SHORT .TryToSetBlockMode |
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| 26 | stc |
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| 27 | mov ah, RET_HD_INVALID |
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| 28 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| 29 | |
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| 30 | ALIGN JUMP_ALIGN |
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| 31 | .TryToSetBlockMode: |
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| [84] | 32 | %ifndef USE_186 |
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| [3] | 33 | call AH24h_SetBlockSize |
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| [148] | 34 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| [84] | 35 | %else |
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| [148] | 36 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH |
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| [84] | 37 | ; Fall through to AH24h_SetBlockSize |
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| 38 | %endif |
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| [3] | 39 | |
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| 40 | |
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| 41 | ;-------------------------------------------------------------------- |
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| 42 | ; AH24h_SetBlockSize |
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| 43 | ; Parameters: |
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| 44 | ; AL: Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128) |
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| [148] | 45 | ; DS:DI: Ptr to DPT (in RAMVARS segment) |
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| [150] | 46 | ; SS:BP: Ptr to IDEPACK |
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| [3] | 47 | ; Returns: |
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| 48 | ; AH: Int 13h return status |
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| 49 | ; CF: 0 if succesfull, 1 if error |
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| 50 | ; Corrupts registers: |
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| [148] | 51 | ; AL, BX, CX, DX |
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| [3] | 52 | ;-------------------------------------------------------------------- |
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| 53 | ALIGN JUMP_ALIGN |
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| 54 | AH24h_SetBlockSize: |
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| [150] | 55 | MIN_U al, MAX_SUPPORTED_BLOCK_SIZE_IN_SECTORS |
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| 56 | push ax |
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| 57 | xchg dx, ax ; DL = Block size (Sector Count Register) |
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| 58 | mov al, COMMAND_SET_MULTIPLE_MODE |
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| 59 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY) |
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| 60 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL |
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| 61 | pop bx |
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| [3] | 62 | jc SHORT .DisableBlockMode |
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| 63 | |
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| 64 | ; Store new block size to DPT and return |
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| [150] | 65 | mov [di+DPT_ATA.bSetBlock], bl ; Store new block size |
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| [3] | 66 | ret |
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| 67 | .DisableBlockMode: |
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| [150] | 68 | mov BYTE [di+DPT_ATA.bSetBlock], 1 ; Disable block mode |
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| [3] | 69 | ret |
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