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Chapter 2 Installation and BIOS Setup
XHCI Hand-Off
This 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.
USB Mass Storage Driver Support
Select Enabled for USB mass storage device support. The options are Disabled and Enabled.
Port 60/64 Emulation
Select Enabled for I/O port 60h/64h emulation support, which in turn, will provide complete
legacy USB keyboard support for the operating systems that do not support legacy USB devices.
The options are Disabled and Enabled.
USB 3.0 Support
Select Enabled for USB 3.0 support. The options are Disabled, Enabled and Auto.
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 Drive
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.
XHCI Idle L1
Select Enabled for XHCI (Extensible Host Controller Interface) Idle Level 1 support on a
USB 3.0 connector specified by the user. The options are Enabled and Disabled.
PCH DMI ASPM
Select Enabled to enable ASPM (Active State Power Management) support for a PCH DMI
drive. The options are Disabled and Enabled.
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