| 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 | ; 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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| 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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| 15 | ; SS:BP: Ptr to IDEPACK
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| 16 | ; Parameters on INTPACK:
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| 17 | ; AL: Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128)
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| 18 | ; Returns with INTPACK:
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| 19 | ; AH: Int 13h return status
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| 20 | ; CF: 0 if successful, 1 if error
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| 21 | ;--------------------------------------------------------------------
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| 22 | AH24h_HandlerForSetMultipleBlocks:
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| 23 | %ifndef USE_186
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| 24 | call AH24h_SetBlockSize
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| 25 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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| 26 | %else
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| 27 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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| 28 | ; Fall to AH24h_SetBlockSize
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| 29 | %endif
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| 30 |
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| 31 |
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| 32 | ;--------------------------------------------------------------------
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| 33 | ; AH24h_SetBlockSize
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| 34 | ; Parameters:
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| 35 | ; AL: Number of Sectors per Block (1, 2, 4, 8, 16, 32, 64 or 128)
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| 36 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 37 | ; SS:BP: Ptr to IDEPACK
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| 38 | ; Returns:
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| 39 | ; AH: Int 13h return status
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| 40 | ; CF: 0 if successful, 1 if error
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| 41 | ; Corrupts registers:
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| 42 | ; AL, BX, CX, DX
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| 43 | ;--------------------------------------------------------------------
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| 44 | AH24h_SetBlockSize:
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| 45 | push ax
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| 46 | xchg dx, ax ; DL = Block size (Sector Count Register)
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| 47 | or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_BLOCK_MODE_SUPPORTED ; Assume success
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| 48 | mov al, COMMAND_SET_MULTIPLE_MODE
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| 49 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_DRDY, FLG_STATUS_DRDY)
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| 50 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL
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| 51 | pop bx
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| 52 | jnc .StoreBlockSize
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| 53 | mov bl, 1 ; Disable block mode
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| 54 | and BYTE [di+DPT.bFlagsHigh], ~FLGH_DPT_BLOCK_MODE_SUPPORTED
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| 55 | .StoreBlockSize: ; Store new block size to DPT and return
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| 56 | mov [di+DPT_ATA.bSetBlock], bl
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| 57 | ret
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