Chapter 7: AMI BIOS
7-15
South Bridge
The following South Bridge information will display:
•
USB Configuration
•
USB Module Version
•
USB Devices
Legacy USB Support
This feature enables support for legacy USB devices. Select Auto to disable legacy
support if USB devices are not present. Select Disable to have USB devices avail-
able only for EFI applications. The options are
Enabled,
Disabled, and Auto.
XHCI Hand-Off
This is a work-around solution for operating systems that do not support XHCI (Ex-
tensible Host Controller Interface) hand-off. The XHCI ownership change should be
claimed by the XHCI driver. The settings are
Enabled
and Disabled.
EHCI Hand-Off
This item is for the Operating Systems that do not support Enhanced Host Controller
Interface (EHCI) hand-off. When this item is enabled, EHCI ownership change will
be claimed by the EHCI driver. The settings are Enabled and
Disabled
.
USB 3.0 Support
Select Enabled for USB 3.0 support. The options are Smart Auto,
Auto
, Enabled,
Disabled.
EHCI1
Select Enabled to enable EHCI (Enhanced Host Controller Interface) support on
USB 2.0 connector #1 (at least one USB 2.0 connector should be enabled for EHCI
support). The options are Disabled and
Enabled
.
EHCI2
Select Enabled to enable EHCI (Enhanced Host Controller Interface) support on
USB 2.0 connector #2 (at least one USB 2.0 connector should be enabled for EHCI
support). The options are Disabled and
Enabled
.
XHCI Pre-Boot Driver
Select Enabled to enable XHCI (Extensible Host Controller Interface) support on a
pre-boot drive specified by the user. The options are
Enabled
and Disabled.
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