| [150] | 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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| [160] | 12 | ; CS:BP: Ptr to IDEVARS for the controller |
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| [150] | 13 | ; Returns: |
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| [258] | 14 | ; CF: Clear, IDE interface only supports hard disks |
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| [150] | 15 | ; Corrupts registers: |
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| [242] | 16 | ; AX |
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| [150] | 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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| [160] | 26 | ; CS:BP: Ptr to IDEVARS for the controller |
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| [150] | 27 | ; Returns: |
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| 28 | ; Nothing |
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| 29 | ; Corrupts registers: |
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| [242] | 30 | ; AX |
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| [150] | 31 | ;-------------------------------------------------------------------- |
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| 32 | .StoreBlockMode: |
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| 33 | mov al, 1 |
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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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| [160] | 36 | ; Fall to IdeDPT_StoreReversedAddressLinesFlagIfNecessary |
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| [150] | 37 | |
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| [160] | 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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| [258] | 44 | ; CF: Always clear, we don't support floppies on the IDE inteface |
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| [160] | 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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| [150] | 52 | |
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| 53 | .EndDPT: |
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| [258] | 54 | clc |
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| [150] | 55 | ret |
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