Chapter 4: AMI BIOS
4-15
PCH-IO Configuration
This item displays the information for PCH-IO Chip.
•
Intel PCH Rev ID
•
USB Configuration
•
USB Devices
EHCI1
Select Enabled to enable EHCI (Enhanced Host Controller Interface) Controller 1
for USB 2.0 support. One EHCI controller must always be enabled. The settings
are
Enabled
and Disabled.
EHCI2
Select Enabled to enable EHCI (Enhanced Host Controller Interface) Controller 2
for USB 2.0 support. One EHCI controller must always be enabled. The settings
are
Enabled
and Disabled.
Legacy USB Support
This feature enables support for legacy USB devices. Select Auto to disable
legacy support if legacy USB devices are not present. Select Disable to have
USB devices available only for EFI applications. The options are
Enabled,
Disabled and Auto.
Port 60/64 Emulation
This feature enables or disables I/O port 60h/64h emulation support. This fea-
ture should be enabled for complete USB keyboard legacy support for operat-
ing systems that cannot detect the presence of USB devices. The options are
Enabled
and Disabled.
XHCI Hand-Off
This item is a work-around solution for operating systems that do not support
XHCI (Extensible 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 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
.