Kontron KBox C-102 Series User Manual page 90

Sub-Screen Function
CSM
Configuration>
CSM16 Module
(continued)
Version>
GateA20 Active>
Option ROM
Messages>
INT19 Trap
Response>
Boot option
filter>
Option ROM
execution –
Network>
Option ROM
execution –
Storage>
Option ROM
execution –
Video>
Option ROM
execution –
Other PCI
devices>
Additional Information CSM:
Compatibility Support Module (CSM) configuration is important for legacy operating systems
By default, CSM is enabled. For modern OS such as Windows 8, 10 and Linux CSM can be
disabled.
If a legacy OS is used or a Windows or Linux system is run in legacy mode then this menu
allows for detailed option settings. Note, a change in settings only come into effect after the
next restart. Therefore, to be able to use the actualized settings, it is recommended to save and
exit the setup and re-enter.
The 'Optional ROM Execution' settings requires special care. Any OS using an INT10 based
display output needs the 'Video' option set to 'Legacy', in the same way that PXE boot needs
'Network' 'Optional ROM' to be set to 'Legacy'.
NVMe Read only field
Configuration>
Acts as a message showing NVMe (Non-Volatile memory PCIe) devices connected to the
system.
[NO NVME Device Found]
Switchable SG Mode Select>
Graphics>
USB Read only fields
Configuration>
USB Configuration, USB Module Version, USB Controllers, and USB devices
Legacy USB
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Second level Sub-Screen / Description
Read only field
Displays CSM16 Module Version
Upon Request – GA20 can be disabled using BIOS services. Always – do not
allow disabling GA20; this option is useful when any RT code is executed
above 1MB.
[Upon request; Always]
Set display mode for Option ROM
[Force BIOS; Keep Current]
BIOS reaction on INT19 trapping by Option ROM: Immediate – execute the
trap right away; Postponed – execute the trap during legacy boot
[Immediate; Postponed]
Read only field
[UEFI only]
Controls the execution of UEFI and Lagacy PXE OpROM
[Do not launch; UEFI; Legacy]
Controls the execution of UEFI and Lagacy Storage OpROM
[Do not launch; UEFI; Legacy]
Controls the execution of UEFI and Lagacy Video OpROM
[Do not launch; UEFI; Legacy]
Controls the OpROM execution policy for devices other than Network,
Storage or Video
[Do not launch; UEFI; Legacy]
Read only field
Switchable graphics selection
[Muxless]
Enable- Supports legacy USB
KBox C-102 - User Guide, Rev. 1.0
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