User Manual

4-30
Chapter 4: BIOS Setup
The following items appear only when
Launch CSM
is set to
[Enabled]
.
GateA20 Active [Upon Request]
This allows you to set the GA20 option.
[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.
Interrupt 19 Capture [Immediate]
Allows you to select the BIOS reaction on INT19 trapping by Option ROM.
[Immediate] Execute the trap right away.
[Postponed] Execute the trap during legacy boot.
[Auto] Auto
Boot Device Control [UEFI only]
Allows you to select the devices boot-up mode according to the devices specification.
Devices with the selected mode will in the boot priority list.
Configuration options: [UEFI and Legacy OPROM] [Legacy OPROM only] [UEFI only]
Boot from Network Devices [Ignore]
Allows you to select the type of onboard LAN controller and installed LAN cards.
Network devices will run the selected type during the system boot. Selecting
[Ignore]
will accelerate the boot up time without running network devices during POST (Power-On
Self-Test).
Configuration options: [Ignore] [UEFI only] [Legacy only]
Boot from Storage Devices [UEFI only]
Allows you to select the type of storage devices to run first during the system boot. It
is recommended to select either
[Legacy only]
or
[UEFI only]
according to devices
specification for better stability. Selecting
[Ignore]
will accelerate the boot up time
without running network devices during POST (Power-On Self-Test).
Configuration options: [Ignore] [UEFI only] [Legacy only]
Launch Video OPROM policy [UEFI only]
This option controls the execution of UEFI and Legacy Video OPROM.
Configuration options: [Ignore] [UEFI only] [Legacy only]
Boot from PCI-E/PCI Expansion Devices [UEFI only]
Allows you to select the type of PCI-E/PCI Expansion devices to run first during the
system boot.
Configuration options: [Ignore] [UEFI only] [Legacy only]