Abit AT7 User Manual page 52

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VIA OnChip IDE Device:
This item can let you sets several items concerning the VIA OnChip IDE device parameters.
IDE Prefetch Mode:
Two options are available: Disabled or Enabled. The default setting is Enabled. The onboard IDE drive
interfaces supports IDE prefetching for faster drive accesses. If you install a primary and/or secondary
add-in IDE interface, set this field to Disabled if the interface does not support prefetching.
Onboard IDE-1 Controller:
The onboard IDE 1 controller can be set as Disabled or Enabled. The default setting is Enabled.
" Master Drive PIO Mode:
!Auto: The BIOS can auto-detect the transfer mode of the IDE devices in order to set its data
transfer rate (Default). You can select the PIO mode from 0 to 4 of the IDE devices in order
to set its data transfer rate.
" Slave Drive PIO Mode:
!Auto: The BIOS can auto-detect the transfer mode of the IDE devices in order to set its data
transfer rate (Default). You can select the PIO mode from 0 to 4 of the IDE devices in order
to set its data transfer rate.
" Master Drive Ultra DMA:
Ultra DMA is a DMA data transfer protocol that utilizes ATA commands and the ATA bus to allow
DMA commands to transfer data at a maximum burst rate of 100 MB/sec.
!Disabled: If you encounter the problem of using Ultra DMA devices, you can try to set this item to
Disabled.
AT7
Figure 3-6B. VIA OnChip IDE Device Screen
Chapter 3