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3.3.13
CSM Configuration
Enable or disable CSM (Compatibility Support Module) configuration support. When
disabled, the system can only support UEFI mode.
GateA20 Active
This is useful when RT code is executed above 1MB. When it's set as 'Upon
Request', GA20 can be disabled using BIOS services. When it's set as 'Always',
it does not allow disabling of GA20.
INT19 Trap Response
The BIOS INT19 trap response is set by option ROM. When it's set as 'Immedi-
ate', the trap will be executed right away. When it's set as 'Postponed', the trap
will be executed during legacy boot.
HDD Connection Order
Some OS require HDD handles to be adjusted.
Figure 3.45 CSM Configuration Screen
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ASMB-831 User Manual
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