| 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_REV2 |
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| 50 | je SHORT .SetFlagForSwappedA0andA3 |
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| 51 | cmp BYTE [cs:bp+IDEVARS.bDevice], DEVICE_FAST_XTIDE |
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| 52 | jne SHORT .EndDPT |
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| 53 | .SetFlagForSwappedA0andA3: |
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| 54 | or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_REVERSED_A0_AND_A3 |
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| 55 | |
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| 56 | .EndDPT: |
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| 57 | clc |
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| 58 | ret |
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