NEXCOM NPT 5850 - Manual (Page 31)

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Configures the USB devices.
Legacy USB Support
Enabled - Enables legacy USB.
Auto - Disables support for legacy when no USB devices are connected.
Disabled - Keeps USB devices available only for EFI applications.
Default: [Enabled]
EHCI Hand-off
This is a workaround for OSes that does not support EHCI hand-off. TheEHCI
ownership change should be claimed by the EHCI driver.
Default: [Disabled]
Second Super IO Configuration
This section is used to configure the I/O functions supported by the onboard Super I/O
chip.