Jetway Computer NU91 - Manual (Page 33)

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USB Support
The optional settings are: [Disabled]; [Full Initial]; [Partial Initial].
[Disabled]: All USB devices will NOT be available until after OS boot;
[Partial Initial]: USB mass storage and specific USB port/device will NOT be
available before OS boot;
[Full Initial]: All USB devices will NOT be available in OS and POST.
PS2 Device Support
The optional settings are: [Disabled]; [Enabled].
The PS2 devices will be skipped if this is set as [Disabled].
Network Stack Driver Support
The optional settings are: [Disabled]; [Enabled].
Network Stack Driver will be skipped if this is set as [Disabled].
Boot Option Priorities
Boot Option # 1
Use this item to set system boot order.
The optional settings are: [UEFI: Built-in EFI Shell]; [Disabled].