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BIOS SETUP
36
MI991 User’s Manual
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
17
USB Controllers:
1 XHCI
USB Devices:
1 Keyboard
Legacy USB Support
Enabled
XHCI Hand-off
Enabled
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.
Summary of Contents for MI991AF
Page 4: ...iv MI991 User s Manual This page is intentionally left blank...
Page 9: ...INTRODUCTION MI991 User s Manual 5 Board Dimensions...
Page 18: ...INSTALLATIONS 14 MI991 User s Manual Connector Locations on MI991...
Page 28: ...INSTALLATIONS 24 MI991 User s Manual PCIE1 PCI E X16 Slot 2EG08211 D2D DF...
Page 50: ...BIOS SETUP 46 MI991 User s Manual This page is intentionally left blank...