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BIOS SETUP
MB990 User’s Manual 39
USB Configuration
Aptio Setup Utility
–
Copyright © 2012 American Megatrends, Inc.
Main
Advanced
Chipset Boot Security Save & Exit
USB Configuration
→ ←
Select Screen
↑↓
Select Item
Enter: Select
+- Change Opt.
F1: General Help
F2: Previous Values
F3: Optimized Defaults
F4: Save & Exit
ESC: Exit
USB Module Version 12
USB Controllers:
1 XHCI
USB Devices:
2 Keyboards, 1 Mouse, 2 Hubs
Legacy USB Support Enabled
XHCI Hand-off Disabled
USB Mass Storage Driver Support Enabled
Port 60/64 Emulation Disabled
USB hardware delays and time-outs:
USB Transfer time-out 20 sec
Device reset tine-out 20 sec
Device power-up delay Auto
Legacy USB Support
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.
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
Enable/Disable USB Mass Storage Driver Support.
Port 60/64 Emulation
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
The time-out value for Control, Bulk, and Interrupt transfers.
Device reset tine-out
USB mass Storage device start Unit command time-out.