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Chapter 5: BIOS Setup
5.4.11 CSM Configuration
CSM Support [Enabled]
This option allows you to enable or disable CSM Support.
Congurationoptions:[Disabled][Enabled]
The following item appears only when CSM Support is set to [Enabled].
GateA20 Active [Upon Request]
This allows you to set the GA20 option.
Congurationoptions:[UponRequest][Always]
Option ROM Messages [Force BIOS]
This allows you to set the display mode for option ROM.
Congurationoptions:[ForceBIOS][KeepCurrent]
INT19 Trap Response [Immediate]
[Immediate] Executethetraprightaway.
[Postponed] Executethetrapduringlegacyboot.
Boot Option filter [Legacy only]
ThisoptionallowsyoutocontroltheLegacy/UEFIROMspriority.
Congurationoptions:[UEFIandLegacy][Legacyonly][UEFIonly]
Network / Storage / Video [Legacy]
ThisoptionallowsyoutocontroltheexecutionofUEFIandLegacyPXE/Storage/
Video OpROM.
Congurationoptions:[UEFI][Legacy]
Other PCI devices [Legacy]
ThisitemdeterminestheOpROMexecutionpolicyfordevicesotherthanNetwork,
Storage,orVideo.
Congurationoptions:[UEFI][Legacy]
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