IBASE Technology IB995, Руководство пользователя

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58 IB995
User’s Manual
4.4.9 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.
XHCI Hand-off 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 Enables / Disables the support for USB
mass storage driver.
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. Options: 10/20/30/40 sec
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
USB Disk
3.0 PMAP Mass storage device emulation type.
‘Auto’
enumerates devices according to their media format.
Optical drives are emulated as
‘CDROM’, drives with
no media will be emulated according to a drive type