SOM-5893 User Manual
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3.2.4.1
CSM16 parameters
Figure 3.36 CSM16 parameters
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 Messages
This item allows uses to select option ROM message.
InT19 Trap Response
BIOS reaction on INT19 trapping by Option ROM:
IMMEDIATE – execute the trap right away;
POSTPONED – execute the trap during legacy boot.