SOM-5991 User Manual
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3.2.2.7
CSM Configuration
Figure 3.13 CSM Configuration
CSM Support
Enable or Disable CSM Support.
GateA20 Active
UPON Request- GA20 can be disabled using BIOS services. Do not allow dis-
abling INT19 Trap Response; this option is useful when any RT code is exe-
cuted above 1MB.
Boot option filter
This option controls Legacy/UEFI ROMs priority.
Network
Controls the execution of UEFI and Legacy PXE OpROM.
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.
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