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Chapter 4: UEFI BIOS
SLOT3 PCI-E 5.0 x16 OPROM
This setting enables or disables SLOT3 OPROM option. Options include Disabled and EFI.
SLOT4 PCI-E 5.0 x16 OPROM
This setting enables or disables SLOT4 OPROM option. Options include Disabled and EFI.
USB Configuration
USB Configuration
USB Module Version
USB Controllers: 4 XHCIs
USB Devices: 1 Drive, 2 Keyboards, 2 Mice, 4 Hubs
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-Off
This is a work-around solution for operating systems that do not support XHCI (Extensible
Host Controller Interface) hand-off. 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 Configuration
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.
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