Asus Z9PR-D16 - Manual (Page 88)

4-26 Chapter 4: BIOS setup
4.4.7 USB Configuration
Enabled 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.
USB Configuration
USB Devices:
2 Drives, 2 Keyboard, 2 Mouse, 3 Hubs
Legacy USB Support [Enabled]
EHCI Hand-off [Disabled]
Port 60/64 Emulation [Enabled]
USB hardware delays and time-outs
USB transfer time-out [20 sec]
Device reset time-out [20 sec]
Mass Storage Devices:
USB Ports Configuration
→←: Select Screen
↑↓: Select Item
Enter: Select Item
+/-: Change Opt.
F1: General Help
F2: Previous Values
F5: Optimized Defaults
F10: Save & Exit
ESC: Exit
Legacy USB Support [Enabled]
This item enables or disables Legacy USB device support.
Configuration options: [Enabled] [Disabled] [Auto]
EHCI Hand-off [Disabled]
This is a workaround for OSes without EHCI ownership change should be claimed
by EHCI driver.
Configuration options: [Disabled] [Enabled]
Port 60/64 Emulation [Enabled]
Enables I/O port 60h/64h emulation support. This should be enabled for the
complete USB keyboard legacy support for non-USB aware OSes.
Configuration options: [Enabled] [Disabled]
USB Hardware Delays and Time-outs
USB transfer time-out [20 sec]
This item sets the time-out value for control, bulk, and interrupt transfer.
Configuration options: [1 sec] [5 sec] [10 sec] [20 sec]
Device reset time-out [20 sec]
USB mass storage device Start Unit command time-out.
Configuration options: [10 sec] [20 sec] [30 sec] [40 sec]
Aptio Setup Utility - Copyright (C) 2011 American Megatrends, Inc.
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Version 2.14.1219. Copyright (C) 2011 American Megatrends, Inc.