Abit NV7M User Manual page 39

Introducing the BIOS
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.
This field does not available to enter when the "Onboard IDE-1 Controller" field is Disabled.
" 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.
This field does not available to enter when the "Onboard IDE-1 Controller" field is Disabled.
" 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.
!Disable: 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)
This field does not available to enter when the "Onboard IDE-1 Controller" field is Disabled.
" Slave Drive Ultra DMA:
!Disable: 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)
This field does not available to enter when the "Onboard IDE-1 Controller" field is Disabled.
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.
USB Controller:
Two options are available: Disabled * Enabled. The default setting is Enabled. This should be enabled if
your system has a USB device installed on the system board and you wish to use it. If you add a higher
performance controller, you will need to disable this feature. If you choose disable this item, the "USB
Keyboard Support" and "USB Mouse Support" items will disappear in Integrated Peripherals menu.
" USB Keyboard Support:
Two options are available: OS * BIOS. The default setting is OS. If your operating system supports a
USB keyboard, please set it to OS. Only in some situations, such as in a pure DOS environment that
does not support a USB keyboard, should you set it to BIOS.
3-11
User's Manual