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Chapter 7: BIOS
Active State Power Management
Select Enabled to use the power management for signal transactions between the
PCI Express L0 and L1 Links. Select Enabled to confi gure PCI-Exp. L0 and L1 Link
power states. The options are Disabled and Enabled.
IOH PCI-E Max Payload Size
Some add-on cards perform faster with the coalesce feature, which limits the
payload size to 128B; while others, with a payload size of 256B which inhibits the
coalesce feature. Please refer to your add-on card user guide for the desired set-
ting. The options are 256B and 128B.
South Bridge Confi guration
USB Functions
Select Enabled to use USB devices. The Options are: Disabled and Enabled.
Legacy USB Support
Select Enabled to use Legacy USB devices. If this item is set to Auto, Legacy USB
support will be automatically enabled if a legacy USB device is installed on the
motherboard, and vise versa. The settings are Disabled, Enabled and Auto.
Port60h/64h Emulation
Select Enabled to enable 60h/64h emulation for complete USB keyboard support
for operating systems that are not compatible with USB devices. The options are
Enabled and Disabled.
USB 2.0 Controller (Available when the item: USB Functions is disabled)
This display indicates if the onboard USB 2.0 controller is activated.
USB 2.0 Controller Mode
This setting allows you to select the USB 2.0 Controller mode. The options are
Hi-Speed (480 Mbps) and Full Speed (12 Mbps).
BIOS EHCI Hand-Off
Select Enabled to enable BIOS Enhanced Host Controller Interface support to
provide a workaround solution for an operating system that does not have EHCI
Hand-Off support. When enabled, the EHCI Interface will be changed from the BIOS-
controlled to the OS-controlled. The options are Disabled and Enabled.
Route Port 80h Cycles to
This feature allows the user to decide which bus to send debug information to. The
options are Disabled, PCI and LPC.
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