Advantech MIC-3399 User Manual page 59

CSM16 Parameters

This item allows users to set the display mode for option ROM.
GateA20 Active

This item allows users to enable/disable GA20 active status. This option is use-
ful when any RT code is executed above 1 MB. When configured as upon
request, GA20 can be disabled using the BIOS. When configured as always,
GA20 disabling is not allowed.
Figure 2.32 CSM16 Parameters
47 MIC-3399 User Manual