Biostar TZ77B Manual page 21

TZ77B/TZ75B/T77 UEFI BIOS Manual
USB Configuration
XHCI Pre-Boot Driver
This item enables or disables XHCI Pre-Boot Driver support.
Options: Enabled (Default) / Disabled
XHCI Mode
This item sets the mode of operation of XHCI controller.
Options: Smart Auto (Default) / Auto / Enabled / Disabled
EHCI1/2
This item controls the USB EHCI (USB2.0) functions. One EHCI controller must
always be enabled.
Options: Enabled (Default) / Disabled
20