COMeT10-3900/BIOS Settings
v1.1
www.winsystems.com
Page 25
• New Boot
Option Pol-
icy
Controls the placement in the boot order of newly
detected UEFI boot options. If default is selected, a
new device is moved to the bottom of the boot
priority list but in front of the UEFI shell. Other
options are the top or the bottom of the list.
Default,
Place First,
Place Last
Default
• CSM Sup-
port
Enables/disables Compatibility Support Module
(CSM), which 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.
Enable.
Disable
Disable
• Primary
IGFX Boot
Display
Selects the video device that is activated during
POST. Secondary boot display selection appears
based on your selection.
NOTE:
This option is only available when CSM
Support is enabled.
Auto, Display
Port 1,
Display Port
2, LVDS
Auto
• GateA20
Active
Enabling the Gate-A20 line is an early step that a
protected-mode x86 operating system does in the
bootup process.
• Upon Request - can be disabled using BIOS
services.
• Always - GA20 never disabled; this option is
useful when any RT code is executed above
1 MB.
NOTE:
This option is only available when CSM
Support is enabled.
Upon
Request,
Always
Upon
Request
• INT19 Trap
Response
Specifies the timing for executing an INT19 trap. INT
19h is a low-level system command normally used
just after POST to boot the OS.
• Immediate - execute the trap right away.
• Postponed - execute the trap during legacy
boot.
NOTE:
This option is only available when CSM
Support is enabled.
Immediate,
Postponed
Immediate
• Boot
Option
Filter
Selects the search criteria for bootable devices.
Legacy looks for bootable drives that use an MBR
partitioning scheme. UEFI looks for bootable drives
that use a GPT partitioning scheme.
NOTE:
This option is only available when CSM
Support is enabled.
UEFI and
Legacy,
Legacy only,
UEFI only
UEFI and
Legacy
Option ROM
Execution
NOTE:
These option are only available when CSM Support is enabled.
• Network
Controls the execution of PXE Boot as UEFI or
Legacy.
Do not
launch, UEFI,
Legacy
UEFI
• Storage
Controls the execution of the UEFI connected
storage device as UEFI or Legacy.
Do not
launch, UEFI,
Legacy
UEFI
• Video
Controls the execution of the Video as UEFI or
Legacy.
Do not
launch, UEFI,
Legacy
UEFI
Feature
Description
Choices
Default
