Advantech ITA-3650T Series User Manual page 50

4.2.2.12 CSM Configuration
CSM Support

This item allows users to enable/disable CSM support. The default setting is
[Enabled].
GateA20 Active

This item is useful when the RT code is executed above 1 MB. When this is set
as [Upon Request], GA20 can be disabled in the BIOS utility. When set as
[Always], GA20 cannot be disabled.
INT19 Trap Response

This item allows users to set the BIOS reaction to INT19 trapping by the option
ROM. With the [Immediate] option, the trap is executed immediately; with [Post-
poned] the trap is executed during legacy boot.
Boot Option Filter

This item allows users to set the legacy/UEFI ROM priority.
Network

This item allows users to control the execution of UEFI and legacy PXE OpRom.
Storage

This item allows users to control the execution of UEFI and legacy storage
OpRom.
Video

This item allows users to control the execution of UEFI and legacy video
OpRom.
Other PCE Devices

This item allows users to determine the OpRom execution policy for other
devices.
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