| 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 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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| 24 | test BYTE [di+DPT.bFlagsHigh], FLGH_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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| 32 | %ifndef USE_186
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| 33 | call AH24h_SetBlockSize
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| 34 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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| 35 | %else
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| 36 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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| 37 | ; Fall to AH24h_SetBlockSize
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| 38 | %endif
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| 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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| 45 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 46 | ; SS:BP: Ptr to IDEPACK
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| 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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| 51 | ; AL, BX, CX, DX
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| 52 | ;--------------------------------------------------------------------
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| 53 | ;ALIGN JUMP_ALIGN
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| 54 | AH24h_SetBlockSize:
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| 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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| 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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| 65 | mov [di+DPT_ATA.bSetBlock], bl ; Store new block size
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| 66 | ret
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| 67 | .DisableBlockMode:
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| 68 | mov BYTE [di+DPT_ATA.bSetBlock], 1 ; Disable block mode
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| 69 | ret
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