Asus P5B - Manual (Page 83)

ASUS P5B 4-
Legacy USB Support [Auto]
Allows you to enable or disable support for USB devices on legacy operating
systems (OS). Setting to Auto allows the system to detect the presence of USB
devices at startup. If detected, the USB controller legacy mode is enabled. If no
USB device is detected, the legacy USB support is disabled. Configuration options:
[Disabled] [Enabled] [Auto]
Port 64/60 Emulation [Disabled]
Allows you to disable or enable the 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: [Disabled] [Enabled]
USB 2.0 Controller Mode [HiSpeed]
Allows you to configure the USB 2.0 controller in HiSpeed (480 Mbps) or Full
Speed (12 Mbps). Configuration options: [HiSpeed] [Full Speed]
BIOS EHCI Hand-Off [Enabled]
Allows you to enable support for operating systems without an EHCI hand-off
feature. Configuration options: [Disabled] [Enabled]
The Module Version and USB Devices Enabled items show the
auto-detected values. If no USB device is detected, the item shows None.
4.4.2 USB Configuration
The items in this menu allows you to change the USB-related features. Select an
item then press <Enter> to display the configuration options.
USB Configuration
Module Version - 2.24.0-11.4
USB Devices Enabled:
None
Legacy USB Support [Auto]
Port 64/60 Emulation [Disabled]
USB 2.0 Controller Mode [HiSpeed]
BIOS EHCI Hand-Off [Enabled]
The following item appears only when the AI Tuning item is set to [AI N.O.S.].
N.O.S. Mode [Auto]
Allows you to select the AI N.O.S. mode.
Configuration options: [Auto] [Standard] [Sensitive] [Heavy Load]