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3.3.7 USB Configuration
Legacy USB Support
Use this option to select legacy support for USB devices. There are four
configuration options: [Enabled], [Auto] and [UEFI Setup Only]. The default
value is [Enabled]. Please refer to below descriptions for the details of
these four options:
[Enabled] - Enables support for legacy USB.
[Auto] - Enables legacy support if USB devices are connected.
[UEFI Setup Only] - USB devices are allowed to use only under UEFI
setup and Windows / Linux OS.
PS/2 Simulator
Enable this item for the complete USB keyboard legacy support for
non-USB aware operating system.