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©2008 Advanced Micro Devices, Inc.
IDE Controller (Device 20, Function 1)
AMD SB600 Register Reference Manual Proprietary Page 193
IDE Ultra DMA Status - RW- 8 bits - [PCI_Reg:55h]
Field Name Bits Default Description
IDE Ultra DMA Status Register: This register specifies the Ultra DMA status for primary channel.
IDE Ultra DMA Mode - RW- 16 bits - [PCI_Reg:56h]
Field Name Bits Default Description
Primary Master Ultra
DMA Access Mode
2:0 0h Ultra DMA access mode for Primary IDE master device. For
instance, UDMA-5 = 101, UDMA-6 = 110.
Reserved 3 0b Reserved. Always read as 0’s.
Primary Slave Ultra DMA
Access Mode
6:4 0h Ultra DMA access mode for Primary IDE Slave device. For
instance, UDMA-5 = 101, UDMA-6 = 110.
Reserved 15:7 000h Reserved. Always wired as 0’s.
IDE Ultra DMA Mode Register: This register specifies the Ultra DMA timings for primary channel.
IDE PCI Retry Timing Counter - RW- 8 bits - [PCI_Reg:60h]
Field Name Bits Default Description
PCI Retry Timing
Counter
3:0 0h Waiting number of PCI clocks. If a PCI Master transaction is
retried, the IDE host controller will wait for 0-15 PCI clocks,
depending upon the value programmed, and will re-issue the
PCI master transaction.
Reserved 7:4 0h Reserved. Always wired as 0’s.
IDE PCI Retry Timing Counter Register: This register specifies the Ultra DMA re-try timings for primary channel.
PCI Error Control - RW- 8 bits - [PCI_Reg:61h]
Field Name Bits Default Description
PCI Data Parity Check
Ignore
0 0b 0 - Check parity bit for DMA transaction.
1 - Ignore parity bit for DMA transaction.
If there is a parity error with a DMA transaction, the IDE
host controller does not set the error bit (Bus Master IDE
Reg.) If this bit is 1, bit 1 is “don’t care.” (same as bit 1=0.)
PCI Descriptor DMA
Abort Enable
1 0b 0 - DMA will not be aborted by PCI parity error at descriptor
table read.
1- DMA will be aborted by PCI parity error at descriptor table
read.
PCI Master/Target Abort
Ignore
2 0b 0 - DMA will be aborted by parity error, master abort, and
target abort at data transaction (if bit0=1 or bit1=0, DMA
does not abort by parity error.)
1 - DMA does not abort by parity error, master abort, and
target abort at data transaction.
Reserved 7:3 00h Reserved. Always wired as 0’s.
PCI Error Control Register: This register specifies DMA parity bit errors.