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Option ROM execution order
Network
This item controls the execution of UEFI and legacy PXE OpROM.
The optional settings are: [Do not launch]; [UEFI only]; [Legacy only].
Storage
This item controls the execution of UEFI and Legacy Storage OpROM.
The optional settings are: [Do not launch]; [UEFI only]; [Legacy only]; [Legacy first];
[UEFI first].
Other PCI devices
This item determines OpROM execution policy for devices other than Network,
storage or video.
The optional settings are: [UEFI first]; [Legacy Only].
USB Configuration
Press [Enter] to make settings for the following sub-items:
USB Configuration
Legacy USB Support
The optional settings are: [Enabled]; [Disabled]; [Auto].
[Enabled]:
To enable legacy USB support.
[Disabled]
: To keep USB devices available only for EFI specification,
[Auto]:
To disable legacy support if no USB devices are connected.
XHCI Hand-off
This is a workaround for OSes without XHCI hand-off support. The XHCI
ownership change should be claimed by XHCI driver.
The optional settings are: [Enabled]; [Disabled].
EHCI Hand-off
This is a workaround for OSes without EHCI hand-off support. The EHCI
ownership change should be claimed by EHCI driver.
The optional settings are: [Disabled]; [Enabled].
USB Mass Storage Driver Support
The optional settings are: [Disabled]; [Enabled].
