USER MANUAL
CHAPTER 4
AMI UEFI BIOS SETUP
- 55 -
BIOS Setting
Description
Setting
Option
Effect
CSM Support
The Compatibility
Support Module (CSM)
is a component of the
UEFI firmware that
provides legacy BIOS
compatibility by
emulating a BIOS
environment, allowing
legacy operating
systems and some
option ROMs that do
not support UEFI to still
be used.
Enabled/
Disabled
Enable or disable
the Compatibility
Support Module
GetaA20 Active
Activate GetaA20
Upon
Request
Enable or disable
this function
Option ROM
Messages
Receiving ROM
Messages Settings
Force
BIOS
Set ROM
messages
parameters
Network
Specifies which
Network option ROM is
booted
UEFI
Only UEFI option
ROMs are booted
Legacy
Storage
Specifies which Storage
option ROM is booted
UEFI
Only UEFI option
ROMs are booted
Legacy
Only Legacy
option ROMs are
booted
Video
Specifies which Video
option ROM is booted
UEFI
Only UEFI option
ROMs are booted
Legacy
Only Legacy
option ROMs are
booted
Other PCI
Devices
Specifies which option
ROM is booted for
devices other than the
network, storage or
video
UEFI
Only UEFI option
ROMs are booted
Legacy
Only Legacy
option ROMs are
booted