Bios - advanced – Kontron KTQ77-FLEX User Manual

Page 89

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KTQ77/Flex Users Guide

KTD-N0848-C Page 89



Function

Selection

Description

Legacy USB Support

Enabled
Disabled
Auto

Enables Legacy USB support.
AUTO option disables legacy support if no
USB devices are connected. DISABLE
option will keep USB devices available only
for EFI applications.

USB3.0 Support

Enabled
Disabled

Enable/Disable USB3.0 (XHCI) Controller
support.

XHCI Hand-off

Enabled
Disabled

This is a workaround for OSes without XHCI
hand-off support.
The XHCI ownership change should be
claimed by XHCI driver.

EHCI Hand-off

Disabled
Enabled

This is a workaround for OSes without EHCI
hand-off support. The EHCI ownership
change should be claimed by EHCI driver.

USB Mass Storage Driver
Support

Enabled
Disabled

Enable/disable USB Mass Storage Driver
Support.

USB transfer time-out

1 sec
5 sec
10 sec
20 sec

The time-out value for Control, Bulk, and
Interrupt transfers.

Device reset time-out

10 sec
20 sec
30 sec
40 sec

USB mass storage device Start Unit
command time-out.

Device power-up delay

Auto
Manual

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.

BIOS - Advanced

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