Asus WS C621E SAGE Series - CSM Configuration

3-12
Chapter 3: BIOS Setup
Chapter 3
3.5.10 CSM Configuration
ThisitemallowsyoutoconguretheCSM(CompatibilitySupportModule)itemstofully
support the various VGA, bootable devices and add-on devices for better compatibility.
CSM Support
This option allows you to enable or disable CSM Support.
Congurationoptions:[Disabled][Enabled]
The following items appear only when you set the CSM Support to [Enabled].
GateA20 Active
This allows you to set the GA20 option.
[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 allows you to set the display mode for option ROM.
Congurationoptions:[ForceBIOS][KeepCurrent]
INT19 Trap Response
This option allows you to control the BIOS reaction on INT19 trapping by Option ROM.
[Immediate] Executethetraprightaway.
[Legacyonly] Executethetrapduringlegacyboot.
Boot Option filter
ThisoptionallowsyoutocontroltheLegacy/UEFIROMspriority.
Congurationoptions:[UEFIandLegacy][Legacyonly][UEFIonly]
Network / Storage / Video
ThisoptionallowsyoutocontroltheexecutionofUEFIandLegacyPXE/Storage/
Video OpROM.
Congurationoptions:[UEFI][Legacy]
Other PCI devices
ThisitemdeterminestheOpROMexecutionpolicyfordevicesotherthanNetwork,
Storage, or Video.
Congurationoptions:[UEFI][Legacy]