User manual

51 ASMB-782 User Manual
Chapter 3 BIOS Operation
Figure 3.27 USB Configuration
XHCI Pre-Boot Driver
To enable or disable XHCI pre-boot driver support
HS Port #1~4 Switchable
To allow HS port switching between XHCI and EHCI. When this item is disabled, the
port is routed to EHCI. If HS port is routed to XHCI, the corresponding SS port is
enabled.
XHCI Streams
Enables or disables XHCI maximum primary stream array size.
EHCI1 and EHCI2
Enable or disable EHCI controller 1 or 2.
USB Ports Pre-Port Disable Control
Enable or disable USB port#1~14