| 1 | ; Project name : XTIDE Universal BIOS
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| 2 | ; Description : Sets IDE Device specific parameters to DPT.
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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 | ; IdeDPT_Finalize
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| 9 | ; Parameters:
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| 10 | ; DS:DI: Ptr to Disk Parameter Table
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| 11 | ; ES:SI: Ptr to 512-byte ATA information read from the drive
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| 12 | ; CS:BP: Ptr to IDEVARS for the controller
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| 13 | ; Returns:
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| 14 | ; CF: Clear, IDE interface only supports hard disks
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| 15 | ; Corrupts registers:
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| 16 | ; AX
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| 17 | ;--------------------------------------------------------------------
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| 18 | IdeDPT_Finalize:
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| 19 | ; Fall to .StoreBlockMode
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| 20 |
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| 21 | ;--------------------------------------------------------------------
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| 22 | ; .StoreBlockMode
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| 23 | ; Parameters:
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| 24 | ; DS:DI: Ptr to Disk Parameter Table
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| 25 | ; ES:SI: Ptr to 512-byte ATA information read from the drive
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| 26 | ; CS:BP: Ptr to IDEVARS for the controller
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| 27 | ; Returns:
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| 28 | ; Nothing
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| 29 | ; Corrupts registers:
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| 30 | ; AX
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| 31 | ;--------------------------------------------------------------------
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| 32 | .StoreBlockMode:
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| 33 | mov al, 1 ; Block mode will be enabled on AH=9h
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| 34 | mov ah, [es:si+ATA1.bBlckSize] ; Max block size in sectors
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| 35 | mov [di+DPT_ATA.wSetAndMaxBlock], ax
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| 36 | ; Fall to IdeDPT_StoreReversedAddressLinesFlagIfNecessary
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| 37 |
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| 38 | ;--------------------------------------------------------------------
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| 39 | ; IdeDPT_StoreReversedAddressLinesFlagIfNecessary
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| 40 | ; Parameters:
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| 41 | ; DS:DI: Ptr to Disk Parameter Table
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| 42 | ; CS:BP: Ptr to IDEVARS for the controller
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| 43 | ; Returns:
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| 44 | ; CF: Always clear, we don't support floppies on the IDE inteface
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| 45 | ; Corrupts registers:
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| 46 | ; Nothing
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| 47 | ;--------------------------------------------------------------------
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| 48 | IdeDPT_StoreReversedAddressLinesFlagIfNecessary:
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| 49 | cmp BYTE [cs:bp+IDEVARS.bDevice], DEVICE_XTIDE_WITH_REVERSED_A3_AND_A0
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| 50 | jne SHORT .EndDPT
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| 51 | or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_REVERSED_A0_AND_A3
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| 52 |
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| 53 | .EndDPT:
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| 54 | clc
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| 55 | ret
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