21
BIOS Setup
CSM Configuration Interface Instruction Table
Interface Parameters
Function Description
Default
CSM Support
CSM support on/off settings
Enabled
GateA20 Active
A20 address wire control mode settings,
option parameters:
Upon Request
Always
A20 is an address wire, which can control the
system how to access memory spaces that
are more than 1MB.
Upon Request
Option Rom Messages
Option Rom messages display mode settings,
option parameters:
Force BIOS: forced display BIOS information
Keep Current: keep current state
Option Rom: no information displayed
Force BIOS
Boot option filter
Boot option filter settings, to control Legal
and UEFI Option Rom’s boot strategy, option
parameters:
UEFI and Legacy
UEFI only
Legacy only
UEFI and
Legacy
Option ROM execution Option Rom execution mode
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Network
NIC Option Rom execution mode settings,
option parameters:
Legacy
UEFI
Legacy
Storage
Storage device Option Rom execution mode
settings, option parameters:
Legacy
UEFI
Legacy
Video
Video device Option Rom execution mode
settings, option parameters:
Legacy
UEFI
Legacy
Other PCI devices
Other PCI devices Option Rom execution
mode settings, option parameters:
Legacy
UEFI
Legacy