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USB Configuration
Feature
Option
Description
Legacy USB Support
Auto
Disabled
Enabled
Enables support for legacy USB. Auto option disables legacy support if no USB devices are connected.
Port 64/60 Emulation
Disabled
Enabled
Enables IO port 60h/64h emuluation support.
USB 2.0 Controller Mode FullSpeed
HiSpeed
Configures the USB 2.0 controller in HiSpeed (480Mbps) or FullSpeed (12Mbps)
BIOS EHCI Hand-Off
Disabled
Enabled
This is a workaround for an OS without EHCI hand-off support. The EHCI ownership change should claim by the EHCI driver
USB reset delay
Disabled
Enabled
Enables extra delay after reset during USB initialization.
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