Advantech MIO-5373 User Manual page 42

3.1.2.11 CSM Configuration
 CSM Support
Enable/Disable CSM Support.
 GateA20 Active
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 Message
BIOS Set display mode for Option ROM.
 INT19 Trap Response
BIOS reaction on INT19 trapping by Option ROM: IMMEDIATE - execute the
trap right away; POSTPONED - execute the trap during legacy boot.
 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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