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Chapter 4
BIOS Configuration
Default Settings Chart (Continued)
IDE HDD Block Mode
Select Enabled only if your hard drives support block mode.
IDE PIO Modes (Primary/Secondary Master/Slave)
The four IDE PIO (Programmed Input/Output) fields let you set a PIO mode (0-
4) for each of up to four IDE devices that the internal PCI IDE interface
supports. Modes 0 through 4 provide successively increased performance. In
Auto mode, the system automatically determines the best mode for each
device.
IDE UDMA Modes (Primary/Secondary Master/Slave)
UDMA (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 33 MB/s. When you select Auto in the four IDE UDMA
fields (for each of up to four IDE devices that the internal PCI IDE interface
supports), the system automatically determines the
optimal data transfer rate for each IDE device.
On-Chip PCI IDE (Primary/Secondary)
This chipset contains a PCI IDE interface with support for two IDE channels.
Select Enabled to activate the primary and/or secondary onboard IDE interface.
Select Disabled to deactivate this interface, if you install a primary and/or
secondary add-in IDE interface.
Onboard PCI SCSI Chip
Select Enabled if your system contains a built-in PCI SCSI controller.
USB Keyboard Support
Select Enabled if your system contains a Universal Serial Bus (USB) controller
and you have a USB keyboard.
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