BIOS Setup
CSB200-818 User Manual
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4
4.4.9
CSM Configuration
BIOS Setting
Description
CSM Support
Enables / Disables CSM support.
GateA20 Active
•
Upon Request disables GA20 when using
BIOS services.
•
Always cannot disable GA20, but is useful
when any RT code is executed above 1 MB.
INT19 Trap Response
Sets how BIOS reacts on INT19 trap by Option
ROM.
•
Immediate executes the trap right away.
•
Postponed executes the trap during legacy
boot.
Boot option filter
Controls the priority of Legacy and UEFI
ROMs.
Network
Controls the execution of UEFI and Legacy
PXE 0pROM.
Storage
Controls the execution of UEFI and Legacy
Storage OpROM.
Video
Controls the execution of UEFI and Legacy
Video OpROM.
Other PCI devices
Determines OpROM execution policy for
devices other than network, storage or video.