Hi,   https://www.armbian.com/orange-pi-pc2/ states: "Following features should work:" ... "SPI+USB boot" .   I was trying to load u-boot from the SPI (but without success). I followed the instructions in  u-boot/board/sunxi/README.sunxi64 : $ ./sunxi-fel spiflash-write 0 spl/sunxi-spl.bin $ ./sunxi-fel spiflash-write 32768 u-boot.itb   Booting from SPI ends with an exception: U-Boot SPL 2017.09-armbian (Sep 13 2017 - 12:23:18) DRAM: 1024 MiB Trying