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CSM Configuration
&
CSM Support
Enables or disables UEFI CSM (Compatibility Support Module) to support a legacy PC boot process.
Enabled
Enables UEFI CSM.
Disabled
Disables UEFI CSM and supports UEFI BIOS boot process only.
This item's setting depends on the configuration of
Boot/Boot Mode
.
&
GateA20 Active
Upon Request
GA20 can be disabled using BIOS services. (Default)
Always
GA20 cannot be disabled.
This option is useful when any RT code is executed above 1 MB. This item is configurable only when
CSM
Support
is set to
Enabled
.
&
Option ROM Messages
Sets display mode for Option ROM. Options available: Force BIOS, Keep Current.
This item is configurable only when
CSM Support
is set to
Enabled
.
&
INT19 Trap Response
Configures BIOS reaction on INT19 trapping by Option ROM.
Immediate
The system executes the trap right away.
Postponed
The system executes the trap during legacy boot.
This item is configurable only when
CSM Support
is set to
Enabled
.
&
HDD Connection Order
Some OS require HDD handles to be adjusted, i.e. OS ins installed onf drive 80h. (Default: Adjust)
&
Boot option filter
Controls Legacy/UEFI ROMs priority.
Legacy only
Enables legacy option ROM only.
UEFI only
Enables UEFI option ROM only.
&
Network
◎
Allows you to select whether to enable the legacy option ROM for the LAN controller.
Legacy
Enables legacy option ROM only.
UEFI
Enables UEFI option ROM only.
&
Storage
◎
Allows you to select whether to enable the UEFI or legacy option ROM for the storage device controller.
Legacy
Enables legacy option ROM only.
UEFI
Enables UEFI option ROM only.
&
Video
◎
Allows you to select whether to enable the UEFI or Legacy option ROM for the graphics controller.
Legacy
Enables legacy option ROM only.
UEFI
Enables UEFI option ROM only.
&
Other PCI devices
◎
Allows you to select whether to enable the UEFI or Legacy option ROM for the PCI device controller other
than the LAN, storage device, and graphics controllers.
Legacy
Enables legacy option ROM only.
UEFI
Enables UEFI option ROM only.
◎
This item's setting depends on the configuration of
Boot Boot Mode
.
Summary of Contents for GIGABYTE GS-S12-P04R
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