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4.3.12 CSM configuration submenu
Menu Item
CSM Support
GateA20 Active
INT19 Trap Response
HDD Connection Order
Boot option filter
Network Stack
Storage Hierarchy
Video
Other PCI devices
4.3.13 NVMe configuration submenu
NVMe Device Options Settings, depend on NVMe Devices found in the system.
4.3.14 SDIO configuration submenu
Menu Item
SDIO Access Mode
SBC-C90
SBC-C90 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by C.M. Copyright © 2021 SECO S.p.A.
Options
Description
Enables or disables the Compatibility Support Module (CSM) Support. When enabled, the following menu
Enabled / Disabled
items will appear
Upon Request
Upon Request: GateA20 can be disabled using BIOS services,
Always
Always: do not allow disabling GateA20; this option is useful when any RT code is executed above 1MB.
BIOS Reaction on INT19 trapping by Option ROM:
Immediate
IMMEDIATE - execute the trap right away;
Postponed
POSTPONED - execute the trap during legacy boot
Adjust
Some OS require HDD handles to be adjusted, i.e. OS is installed on drive 80h
Keep
UEFI and Legacy
Legacy only
This option controls Legacy / UEFI ROMs priority
UEFI only
Do not launch
UEFI
Controls the execution of UEFI and Legacy PXE OpROM
Legacy
Do not launch
UEFI
Controls the execution of UEFI and Legacy Storage OpROM
Legacy
Do not launch
UEFI
Controls the execution of UEFI and Legacy Video OpROM
Legacy
Do not launch
UEFI
Determines the OpROM execution policy for devices other than Network, Storage or Video
Legacy
Options
Description
Auto
Auto Option: Access the SD Device in DMA mode if the controller supports it, otherwise in PIO Mode.
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