Abit AT7 User Manual page 53

Introducing the BIOS
!Auto:
When you select Auto, the system automatically determines the optimal data transfer rate
for each IDE device. (Default)
" Slave Drive Ultra DMA:
!Disabled: If you encounter the problem of using Ultra DMA devices, you can try to set this item to
Disabled.
!Auto:
When you select Auto, the system automatically determines the optimal data transfer rate
for each IDE device. (Default)
Onboard IDE-2 Controller:
The onboard IDE 2 controller can be set as Enabled or Disabled. Description is the same as the item
"Onboard IDE-1 Controller". You can refer the above description.
PIO MODE 0~4 reflects the IDE device data transfer rate. The higher the MODE value is, the better the
IDE device data transfer rate. However, it does not mean that the highest MODE value can be selected.
You first have to be sure that your IDE device supports this MODE. Otherwise, the hard disk will not be
able to operate normally.
VIA OnChip PCI Device:
This item can let you sets item concerning the VIA OnChip PCI device parameters.
VIA-3058 AC97 Audio:
Two options are available: Auto or Disabled. The default setting is Auto. Your motherboard has the
built-in AC97 Codec that can support AC97 specifications. If you set this controller to Enabled, you can
use AC97 audio functions.
Figure 3-6C. VIA OnChip PCI Device Screen
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User's Manual