IEI Integration NANO-9453 v1.10 - Manual (Page 166)

NANO-9453 EPIC Motherboard
Page 146
Use the USB Function BIOS option to enable or disable a specified number of USB ports.
If only two USB ports are being used, disabling the remaining six USB frees up system
resources that can be redirected elsewehere.
Disabled USB function support disabled
2 USB Ports Two USB ports are enabled
4 USB Ports Four USB ports are enabled
6 USB Ports D EFAULT Six USB ports are enabled
USB 2.0 Controller [Enabled]
Use the USB 2.0 Controller BIOS option to enable or disable the USB 2.0 controller
Disabled USB 2.0 controller disabled
Enabled D EFAULT USB 2.0 controller enabled
Legacy USB Support [Enabled]
Use the Legacy USB Support BIOS option to enable USB mouse and USB keyboard
support.
Normally if this option is not enabled, any attached USB mouse or USB keyboard does not
become available until a USB compatible operating system is fully booted with all USB
drivers loaded. When this option is enabled, any attached USB mouse or USB keyboard
can control the system even when there is no USB driver loaded onto the system.
Disabled Legacy USB support disabled
Enabled D EFAULT Legacy USB support enabled
Auto Legacy USB support disabled if no USB devices are
connected
USB2.0 Controller Mode [HiSpeed]