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Chapter 7: BIOS
7-15
All USB Devices
This feature enables all USB ports/devices. The options are Disabled and Enabled.
(If set to Enabled, EHCI Controller 1 and Controller 2 will appear.)
EHCI Controller 1/EHCI Controller 2 (Available when All USB Devices is set
to Enabled)
Select Enabled to enable Enhanced Host Controller Interface (EHCI) Controller 1/
Controller 2. The options are Disabled and Enabled.
Legacy USB Support (Available when USB Functions is not Disabled)
Select Enabled to support legacy USB devices. Select Auto to disable legacy sup-
port if USB devices are not present. Select Disable to have USB devices available
for EFI (Extensive Firmware Interface) applications only. The settings are Disabled,
Enabled and Auto.
Port 60/64 Emulation
Select Enabled to enable I/O port 60h/64h emulation support for the legacy USB
keyboard so that it can be fully supported by the operating systems that does not
recognize a USB device. The options are Disabled and Enabled.
EHCI Hand-Off
This item is for operating systems that do not support Enhanced Host Controller
Interface (EHCI) hand-off. When enabled, EHCI ownership change will be claimed
by the EHCI driver. The options are Disabled and Enabled.
Audio Confi guration
Azalia HD (High Defi nition) Audio
Select Enabled to enable support for Azalia High Defi nition Audio. The options are
Enabled and Disabled.
Azalia Internal HDMI Decode
Select Enabled to enable support for Azalia High Defi nition Muliti-Media Interface
Decode. The options are Enabled and Disabled.