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CSM Configuration
CSM Support
This option enables or disables CSM support.
Options: Disabled (Default) / Enabled
Note
» The following items appear only when you set the CSM Support function to [Enabled]
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.
Options: Upon Request (Default) / Always
INT19 Trap Response
BIOS reaction on INT19 trapping by Option ROM: IMMEDIATE - execute the trap right away;
POSTPONED - execute the trap during legacy boot.
Options: Immediate (Default) / Postponed
HDD Connection Order
Some OS require HDD handles to be adjusted, i.e. OS is installed on drive 80h.
Options: Adjust (Default) / Keep
Boot option filter
This option controls Legacy/UEFI ROMs priority.
Options: UEFI and Legacy (Default) / Legacy only / UEFI only
Network
This option controls the execution of UEFI and Legacy Network OpROM
Options: UEFI (Default) / Do not launch / Legacy
Storage
This option controls the execution of UEFI and Legacy Storage OpROM
Options: UEFI (Default) / Do not launch / Legacy
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2. Advanced Menu | 15
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