Chapter 4: UEFI BIOS
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Legacy USB Support
Select Enabled to support onboard legacy USB devices. Select Auto to disable legacy support
if there are no legacy USB devices present. Select Disable to have all USB devices available
for EFI applications only. The options are Enabled, Disabled and Auto.
XHCI Hand-O
This is a work-around solution for operating systems that do not support XHCI (Extensible
Host Controller Interface) hand-o. The XHCI ownership change should be claimed by the
XHCI driver. The options are Enabled and Disabled.
Port 60/64 Emulation
Select Enabled for I/O port 60h/64h emulation support, which in turn, will provide complete
legacy USB keyboard support for the operating systems that do not support legacy USB
devices. The options are Disabled and Enabled.
Network Conguration
Network Conguration
Network Stack
This setting allows you to Disable or Enable the UEFI Network Stack.
IPv4 PXE Support
This setting allows you to Disable or Enable IPv4 PXE boot support. If disabled, IPv4 PXE
boot support will not be available.
IPv4 HTTP Support
This setting allows you to Disable or Enable IPv4 HTTP boot support. If disabled, IPv4 HTTP
boot support will not be available.
IPv6 PXE Support
This setting allows you to Disable or Enable IPv6 PXE boot support. If disabled, IPv6 PXE
boot support will not be available.
IPv6 HTTP Support
This setting allows you to Disable or Enable IPv4 HTTP boot support. If disabled, IPv4 HTTP
boot support will not be available.
PXE Boot Wait Time
This setting allows you to set in a number eld the wait time to press the ESC key to abort
the PXE boot. The default value is 0.
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