ADLINK cPCI-3970 Series - Manual (Page 129)

BIOS Setup Utility 115
cPCI-3970
USB Configuration
Legacy USB Support
Legacy USB Support refers to USB mouse and keyboard sup-
port. Normally if this option is not enabled, any attached USB
mouse or keyboard will not become available until a USB com-
patible operating system is fully booted with all USB drivers
loaded. When this option is enabled, any attached USB mouse
or keyboard can control the system even when there is no USB
driver loaded on the system. Set this value to enable or disable
the Legacy USB Support.
EHCI Hand-off
This is a workaround for OSes without EHCI hand-off support.
The EHCI ownership change should be claimed by the EHCI
driver. Options: Enable, Disable.
USB transfer time-out
This item sets the time-out value for Control, Bulk and Interrupt
transfers.
Device Reset Timeout
USB mass storage device Start Unit command timeout.