Chapter 4: BIOS Settings
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Feature
Options
Description
CSM Support
Disabled
Enabled
Enables or disables CSM Support
GateA20 Active
Upon Request
Always
UPON REQUEST - GA20 can be disabled using
BIOS services. ALWAYS - do not allow disabling
GA20; this option is useful when any RT code is
executed above 1MB.
Option ROM Messages
Force BIOS
Keep Current
Set display mode for Option ROM
INT19 Trap Response
Immediate
Postponed
BIOS reaction on INT19 trapping by Option
ROM: IMMEDIATE - execute the trap right
away; POSTPONED - execute the trap during
legacy boot.
Boot option filter
UEFI and Legacy
Legacy only
UEFI only
This option controls Legacy/UEFI ROMs priority
Network
Do Not Launch
UEFI
Legacy
Controls the execution of UEFI and Legacy PXE
OpROM
Storage
Do Not Launch
UEFI
Legacy
Controls the execution of UEFI and Legacy
Storage OpROM
Video
Do Not Launch
Controls the execution of UEFI and Legacy