| [150] | 1 | ; Project name : XTIDE Universal BIOS |
|---|
| 2 | ; Description : Sets IDE Device specific parameters to DPT. |
|---|
| 3 | |
|---|
| 4 | ; Section containing code |
|---|
| 5 | SECTION .text |
|---|
| 6 | |
|---|
| 7 | ;-------------------------------------------------------------------- |
|---|
| 8 | ; IdeDPT_Finalize |
|---|
| 9 | ; Parameters: |
|---|
| 10 | ; DS:DI: Ptr to Disk Parameter Table |
|---|
| 11 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
|---|
| [160] | 12 | ; CS:BP: Ptr to IDEVARS for the controller |
|---|
| [150] | 13 | ; Returns: |
|---|
| [258] | 14 | ; CF: Clear, IDE interface only supports hard disks |
|---|
| [150] | 15 | ; Corrupts registers: |
|---|
| [242] | 16 | ; AX |
|---|
| [150] | 17 | ;-------------------------------------------------------------------- |
|---|
| 18 | IdeDPT_Finalize: |
|---|
| 19 | ; Fall to .StoreBlockMode |
|---|
| 20 | |
|---|
| 21 | ;-------------------------------------------------------------------- |
|---|
| 22 | ; .StoreBlockMode |
|---|
| 23 | ; Parameters: |
|---|
| 24 | ; DS:DI: Ptr to Disk Parameter Table |
|---|
| 25 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
|---|
| [160] | 26 | ; CS:BP: Ptr to IDEVARS for the controller |
|---|
| [150] | 27 | ; Returns: |
|---|
| 28 | ; Nothing |
|---|
| 29 | ; Corrupts registers: |
|---|
| [242] | 30 | ; AX |
|---|
| [150] | 31 | ;-------------------------------------------------------------------- |
|---|
| 32 | .StoreBlockMode: |
|---|
| [276] | 33 | mov al, 1 ; Block mode will be enabled on AH=9h |
|---|
| [150] | 34 | mov ah, [es:si+ATA1.bBlckSize] ; Max block size in sectors |
|---|
| 35 | mov [di+DPT_ATA.wSetAndMaxBlock], ax |
|---|
| [160] | 36 | ; Fall to IdeDPT_StoreReversedAddressLinesFlagIfNecessary |
|---|
| [150] | 37 | |
|---|
| [160] | 38 | ;-------------------------------------------------------------------- |
|---|
| 39 | ; IdeDPT_StoreReversedAddressLinesFlagIfNecessary |
|---|
| 40 | ; Parameters: |
|---|
| 41 | ; DS:DI: Ptr to Disk Parameter Table |
|---|
| 42 | ; CS:BP: Ptr to IDEVARS for the controller |
|---|
| 43 | ; Returns: |
|---|
| [258] | 44 | ; CF: Always clear, we don't support floppies on the IDE inteface |
|---|
| [160] | 45 | ; Corrupts registers: |
|---|
| 46 | ; Nothing |
|---|
| 47 | ;-------------------------------------------------------------------- |
|---|
| 48 | IdeDPT_StoreReversedAddressLinesFlagIfNecessary: |
|---|
| [361] | 49 | cmp BYTE [cs:bp+IDEVARS.bDevice], DEVICE_XTIDE_REV2 |
|---|
| 50 | je SHORT .SetFlagForSwappedA0andA3 |
|---|
| 51 | cmp BYTE [cs:bp+IDEVARS.bDevice], DEVICE_FAST_XTIDE |
|---|
| [160] | 52 | jne SHORT .EndDPT |
|---|
| [361] | 53 | .SetFlagForSwappedA0andA3: |
|---|
| [160] | 54 | or BYTE [di+DPT.bFlagsHigh], FLGH_DPT_REVERSED_A0_AND_A3 |
|---|
| [150] | 55 | |
|---|
| 56 | .EndDPT: |
|---|
| [258] | 57 | clc |
|---|
| [150] | 58 | ret |
|---|
