DirectKey (DRCT) [Enabled]

[Disabled]

Disables the DirectKey button. The system will only power on or off when

 

you press the DirectKey button.

[Enabled]

Allows the system to power on and go to the BIOS Setup directly when you

 

press the Reset button. Connect the 2-pin connector of the chassis reset

 

buton cable to the onboard DRCT header.

Bootup NumLock State [On]

This item allows you to on/off power-on state of the NumLock.

Configuration options: [On] [Off]

Wait For ‘F1’ If Error [Enabled]

This item allows your system to wait for the <F1> key to be pressed when error occurs. Configuration options: [Disabled] [Enabled]

Option ROM Messages [Force BIOS]

This item allows you to set the display mode for Option ROM.

Configuration options: [Force BIOS] [Keep Current]

INT19 Trap Response [Immediate]

[Immediate]

Executes the trap for INT19 immediately.

[Postponed]

Executes the trap during legacy boot.

Above 4G Decoding [Disabled]

This item allows you to decode the 64-bit capable devices above 4G address space. Ensure that your system supports 64-bit PCI decoding.

Configuration options: [Disabled] [Enabled]

Setup Mode [EZ Mode]

[Advanced Mode]

This item allows you to go to Advanced Mode of the BIOS after POST.

[EZ Mode]

This item allows you to go to EZ Mode of the BIOS after POST.

CSM (Compatibility Support Module)

This item allows you to configure the CSM (Compatibility Support Module) items to fully support the various VGA, bootable devices and add-on devices for better compatibility.

Launch CSM [Enabled]

[Auto]

The system automatically detects the bootable devices and the add-

 

on devices.

[Enabled]

For better compatibility, enable the CSM to fully support the non-UEFI

 

driver add-on devices or the Windows® UEFI mode.

[Disabled]

Disables the CSM to fully support the non-UEFI driver add-on devices

 

or the Windows® UEFI mode.

Chapter 3

ASUS X99-A

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