NCA-4025 User Manual
61
USB Configuration
Feature
Options
Description
Legacy USB Support
Enabled
Disabled
Auto
Enables Legacy USB support.
Auto
option disables legacy support if no
USB devices are connected;
Disabled
option will keep USB devices
available only for EFI applications.
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.
USB Mass Storage
Driver Support
Enabled
Disabled
Enables or disables USB Mass Storage
Driver Support.
Port 60/64 Emulation
Enabled
Disabled
Enables I/O port 60h/64h emulation
support. This should be enabled for the
complete USB keyboard legacy support for
non-USB aware OSes.
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
1 sec
USB mass storage device Start Unit
