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Advanced
X
USB Configuration
Legacy USB Support
• Enabled
Enable Legacy USB support.
• Disabled
Keep USB devices available only for EFI applications.
• Auto
Disable Legacy support if no USB devices are connected.
XHCI Hand-off
Enable or disable XHCI Hand-off.
USB Mass Storage Driver Support
Enable or disable USB Mass Storage Driver Support.
Port 60/64 Emulation
Enables I/O port 60h/64h emulation support. This should be enabled for the complete USB
keyboard legacy support for non-USB aware OSes.
User's Manual | TGU171/TGU173
Advanced
X
USB hardware delays and time-outs
• USB transfer time-out
The time-out value for Control, Bulk, and Interrupt transfers.
• Device reset time-out
USB mass storage device Start Unit command time-out.
• Device power-up delay
Maximum time the device will take before it properly reports
itself to the Host Controller. 'Auto' uses default value: for a Root port it is 100 Ms, for a
Hub port the delay is taken from Hub descriptor.
Chapter 3
BIOS SETTINGS
34
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