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EMX-BYT3 User's Manual
GateA20 Active
Option ROM Messages
Boot option filter
Network
Storage
Video
Other PCI devices
3.6.2.12 USB Configuration
The USB Configuration menu helps read USB information and configures USB settings.
Item
Legacy USB Support
XHCI Hand-off
54 EMX-BYT3 User's Manual
Upon Request[Default]
Always
Force BIOS[Default]
Keep Current
UEFI and Legacy
Legacy only[Default]
UEFI only
Do not launch[Default]
UEFI
Legacy
Do not launch
UEFI
Legacy[Default]
Do not launch
UEFI
Legacy[Default]
Do not launch
UEFI[Default]
Legacy
Options
Enabled[Default]
Disabled
Auto
Enabled[Default]
UPON REQUEST – GA20 can be disabled
using BIOS services. ALWAYS – go not
allow disabling GA20; this option is useful
when any RT code is executed above 1MB.
Set display mode for Option ROM.
This option controls Legacy/UEFI ROMs
priority.
Controls the execution of UEFI and Legacy
PXE OpROM.
Controls the execution of UEFI and Legacy
Storage OpROM.
Controls the execution of UEFI and Legacy
Video OpROM.
Determines OpROM execution policy for
devices other than Network, Storage, or
Video.
Description
Enables Legacy USB support. AUTO option
disables legacy support if no USB devices are
connected. DISABLE option will keep USB
devices available only for EFI applications.
This is a workaround for OSew without XHCI
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