Avalue EPI-QM67 - Manual (Page 53)

User ’s Manual
EPI-QM67 User ’s Manual 53
Item Options Description
USB Device Display how many devices are connected.
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.
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 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
The time-out value for Control, Bulk, and
Interrupt transfers.
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
100ms, for a Hub port the delay is taken form
Hub descriptor.
Mass Storage Devices
Auto
Floppy
Forced FDD
Hard Disk
CD-ROM
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.