User Manual

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Chapter 4: BIOS Setup
4.6.10 CSM Configuration
CSM Support [Enabled]
This option allows you to enable or disable CSM Support.
Configuration options: [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.
Configuration options: [Upon Request] [Always]
Option ROM Messages [Force BIOS]
This allows you to set the display mode for option ROM.
Configuration options: [Force BIOS] [Keep Current]
INT19 Trap Response [Immediate]
[Immediate] Execute the trap right away.
[Postponed] Execute the trap during legacy boot.
Boot Option filter [Legacy only]
This option allows you to control the Legacy/UEFI ROMs priority.
Configuration options: [UEFI and Legacy] [Legacy only] [UEFI only]
Network / Storage / Video [Legacy]
This option allows you to control the execution of UEFI and Legacy PXE / Storage /
Video OpROM.
Configuration options: [UEFI] [Legacy]
Other PCI devices [Legacy]
This item determines the OpROM execution policy for devices other than Network,
Storage, or Video.
Configuration options: [UEFI] [Legacy]