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USB Configuration
► Legacy USB Support
This item is used to enable the support for USB devices on legacy OS. If you have a USB
keyboard or mouse, set to auto or enabled.
► USB 2.0 Controller Mode
This item is used to set the transmission rate mode of USB 2.0. The available settings are :
[High Speed] in 480Mbps; [Full Speed] in 12Mbps.
► BIOS EHCI Hand-Off
Windows XP supports a number of features in the Enhanced Host Controller Interface (EHCI)
specification, but there are a few features that are not implemented. Microsoft said preliminary
support for EHCI BIOS handoff will be available in Windows XP SP2.
This item allows you to enable support for OS without EHCI hand-off feature.
This is a workaround for OS without EHCI hand-Off support .
The EHCI ownership change should claim by EHCI driver.
If USB devices are connected to the computer, the following item will appear :
► USB Mass Storage Device Con
After pressing <Enter>, you can set the reset delay for the USB mass storage device. There
are many different emulation types of this USB device, such as floppy, hard disk and CDROM
can be selected.
CMOS Setup Utility - Copyright (C) 1985-2009, American Megatrends, Inc.
USB Configuration
USB Configuration
Help Item
Module Version - 2.24.5-13.4
Enabled support for
legacy USB. AUTO
USB Device Enabled : disables legacy
1 Keyboard
support if no USB
devices are connected
Legacy USB Support
USB 2.0 Controller Mode [HiSpeed]
BIOS EHCI Hand-Off [Enabled]
► USB Mass Storage Device Con
[Press Enter]
↑↓←→:Move Enter:Select +/-/:Value F10:Save ESC:Exit F1:General Help
F2/F3:Change Colors
F9:Optimized Defaults
[Enabled]