Intel AIMB-253 - Manual (Page 51)

41 Chapter 3 BIOS Setup
Onboard Device
Figure 3.6: Onboard Device
USB Controller
This setting is used to enable/disable the onboard USB controller.
USB 2.0 Controller
This setting is used to enable/disable the onboard USB 2.0 controller.
USB Keyboard/Mouse Support
Set to [Enabled] if your need to use a USB-interfaced keyboard/mouse in
the operating system that does not support or have any USB driver
installed, such as DOS and SCO Unix.
Azalia/AC97 Audio Select
Azalia is the codename of “High Definition Audio”. This setting controls
the High Definition Audio interface integrated in the Southbridge.
Audio Amplifier Control
This setting disables/enables the audio amplifier.