Changing the Boot Order on the Development Platform

The steps in this section outline how to navigate the BIOS menu system to change the boot order.

Before you begin

  1. Assemble your development platform, as described in platform setup.
  2. Connect any intended boot devices (USB, SDCard) as the BIOS must find them to populate the selection menu. See creating bootable media for details.
  3. Have accessories connected, or a workstation configured for the chosen development method. Maximize the workstation terminal window if the display is hard to read or the font is fuzzy.
  4. Energise the development platform by connecting a power source.

Entering the BIOS Menu

Enter the BIOS setup menu by depressing [F2] during the first few seconds of the boot process; power cycle and repeat if the BIOS menu system is not displayed.

Note: macOS* users need to depress Fn+F2 when prompted, and then select Reboot into Firmware Interface and press Enter. Then depress Fn+F2 again to open the BIOS menu.

Changing the Boot Order

  1. Within the BIOS menu system, find and select the Boot Maintenance Manager

  2. Select Boot Options.

  3. Select Change Boot Order, then find and select the intended boot device. They will be listed as either an EFI USB Device (for USB drives) or EFI uSD Device (for microSD cards).


If your device is not an option in the menu, be sure that you have properly inserted your microSD card or USB boot drive prior to booting the platform. Power down the platform, unplug and re-attach the intended boot device, and then restart the development platform to try again.

  1. Use the BIOS menu controls to arrange boot devices in the desired order.

  • Highlight a boot device and then press [+] to move it to the top of the list.

  • Press Enter to apply your changes.

  • Select Commit Changes and Exit. Then return to the main setup menu by pressing ESC twice.

  • Save all changes and reboot.

For more complete information about compiler optimizations, see our Optimization Notice.