User Manual

35
Using BIOS
Primary/Secondary Master/Slave PIO (Auto)
Each IDE channel supports a master device and a slave device. These four items let you
assign the kind of PIO (Programmed Input/Output) was used by the IDE devices. Choose
Auto to let the system auto detect which PIO mode is best, or select a PIO mode from 0-4.
Primary/Secondary Master/Slave UDMA (Auto)
Each IDE channel supports a master device and a slave device. This motherboard supports
UltraDMA technology, which provides faster access to IDE devices.
If you install a device that supports UltraDMA, change the appropriate item on this list to
Auto. You may have to install the UltraDMA driver supplied with this motherboard in order
to use an UltraDMA device.
Press <Esc> to return to the Integrated Peripherals page.
IDE HDD Block Mode (Enabled)
Enable this field if your IDE hard drive supports block mode. Block mode enables BIOS to
automatically detect the optimal number of block read and writes per sector that the drive
can support. It also improves the speed of access to IDE devices.
VIA OnChip PCI Device (Press Enter)
Scroll to this item and press <Enter> to view the following screen:
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Item Help
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Phoenix-AwardBIOS CMOS Setup Utility
VIA OnChip PCI Device

F5:Previous Values F6:Fail-Safe Defaults F7:Optimized Defaults
: Move Enter: Select +/-/PU/PD:Value F10:Save ESC:Exit F1: General Help
AC97 Audio [Auto]
OnChip USB Controller [All Enabled]
OnChip EHCI Controller [Enabled]
USB Emulation [ON]
USB Keyboard Support Enabled
USB Mouse Support Enabled
AC97 Audio (Auto)
This option allows you to control the onboard AC’ 97 audio. Disable this item if you are
going to install a PCI audio add-on card.
OnChip USB Controller (All Enabled)
This item enables users to enable or disable the onchip USB function, setting it to be USB1.1
or USB2.0 compatible.
OnChip EHCI Controller (Enabled)
x
x
IDE Prefetch Mode (Enabled)
The onboard IDE drive interface supports IDE prefetching, for faster drive access. If you
install a primary and secondary add-on interface, set this field to Disable if the interface
does not support prefetching.
Enable or disable the Onboard EHCI controller.
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