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BIOS Setup
BISD3-QM77
User’s Manual
55
4
4.4.6
USB Configuration
BIOS Setting
Description
Legacy USB Support
Enables Legacy USB support.
“Auto” disables legacy support if there is no USB
device connected.
“Disable” keeps USB devices available only for
EFI applications.
USB 3.0 Support
Enables / Disables the support for USB 3.0.
XHCI Hand-off
This is a workaround for OSes without XHCI
hand-off support. The XHCI ownership change
should be claimed by XHCI driver.
EHCI Hand-off
This is a workaround for OSes without EHCI
hand-off support. The EHCI ownership change
should be claimed by EHCI driver.
USB Transfer
time-out
The time-out value for Control, Bulk, and Interrupt
transfers.
Device reset time-out
Seconds of delaying execution of start unit
command to USB mass storage device.
Device power-up
delay
The 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
100ms. But for a Hub port, the delay is taken from
Hub descriptor.
Содержание BISD3-QM77
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