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2016
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8.4.22
CSM & Option ROM Control Submenu
Feature
Options
Description
CSM Support
Disabled
Enabled
Enable or disable CSM support.
CSM16 Module Version
No option
Gate A20 Active
Upon Request
Always
‘Upon Request’ - Gate A20 can be disabled with BIOS services.
‘Always’ - Gate A20 cannot be disabled.
Note:
This feature is useful if runtime code above 1MB is executed.
Option ROM Messages
Force BIOS
Keep Current
Set display mode for option ROMs.
INT19 Trap Response
Immediate
Postponed
Set BIOS reaction on INT19 trapping by option ROM:
‘Immediate’ - Executes the trap right away.
‘Postponed’ - Executes the trap during legacy boot.
Boot Option Filter
UEFI and Legacy
Legacy only
UEFI only
This feature controls which devices/boot loaders the system should boot to.
Option ROM execution
PXE Option ROM Launch Policy
Do not launch
UEFI ROM Only
Legacy ROM Only
This feature c
ontrols the execution of UEFI and legacy PXE option ROMs.
Storage Option ROM Launch Policy
Do not launch
UEFI ROM Only
Legacy ROM Only
This feature c
ontrols the execution of UEFI and legacy mass storage device option ROMs.
Video Option ROM Launch Policy
Do not launch
UEFI ROM Only
Legacy ROM Only
This feature c
ontrols the execution of UEFI and legacy video option ROMs.
Other Option ROM Launch Policy
Do not launch
UEFI ROM Only
Legacy ROM Only
This feature controls the execution of option ROMs for PCI / PCI
Express devices other than
network, mass storage and video.
8.4.23
NVMe Configuration Submenu
Settings are displayed if a NVMe device is connected.