Asus P1-PH1 - Manual (Page 76)

5-18 Chapter 5: BIOS setup
5.4.5 USB configuration
The items in this menu show the USB configuration settings. Select an
item then press <Enter> to display a pop-up menu with the configuration
options.
USB Controller [Enabled]
USB EHCI Controller [Enabled]
USB Legacy Support [Enabled]
Select Menu
Item Specific Help
USB Configuration
USB Controller [Enabled]
Allows you to enable or disable the USB controller.
Configuration options: [Disabled] [Enabled]
USB EHCI Controller [Enabled]
Allows you to enable or disable the EHCI controller. Setting this item to
[Enabled] allows the built-in high speed USB support in the BIOS to turn
on automatically when you install high speed USB devices.
Configuration options: [Disabled] [Enabled]
USB Legacy Support [Enabled]
Allows you to enable or disable support for legacy USB devices.
Configuration options: [Disabled] [Enabled]