Vecow UMBC-1100 User Manual page 53

4.3.14 CSM Configuration
Figure 4-3-14 : CSM Settings
CSM Support
Enable/disable CSM support
GateA20 Active
UPON REQUEST - GA20 can be disabled using BIOS services.
ALWAYS - do not allow GA20 to be disabled; this option is useful when any RT
code is executed above 1MB.
Option ROM Messages
Set display mode for Option ROM.
INT19 Trap Response
BIOS reaction on INT19 trapping by Option ROM :
IMMEDIATE - execute the trap right away;
POSTPONED - execute the trap during legacy boot.
HDD Connection Order
Some OS require HDD handles to be adjusted, i.e. OS is installed on drive 80h.
Boot option filter
This option controls Legacy/UEFI ROM's priority.
Network
Controls the execution of UEFI and Legacy PXE OpROM.
Storage
Controls the execution of UEFI and Legacy Storage OpROM.
Video
Allows more than two frequency ranges to be supported.
Other PCI devices
Determines OpROM execution policy for devices other than network, storage, or video.
©Vecow UMBC-1100 User Manual BIOS SETUP 46