MIC-770 User Manual 48
3.2.2.14 CSM Configuration
Figure 3.31 CSM Configuration
Compatibility Support Module Configuration
– CSM Support
Enable/Disable CSM Support.
CSM16 Module Version
– GateA20 Active
Upon Request - GA20 can be disabled using BIOS services. Do not allow
disabling GA20; this option is useful when any RT code is executed above
1MB.
– Option ROM Message
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.
Option ROM execution
– 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, Stor-
age, or Video.
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