Ben's notes

gunzip apu2-tinycore6.4.img.gz
sudo dd if=apu2-tinycore6.4.img of=/dev/sdX bs=4k

sudo mount /dev/sdX1 /mnt
sudo tar zxf apu2_v4.6.9.rom.tar.gz -C /mnt
sudo umount /mnt

screen /dev/ttyUSB0 115200

# cd /media/SYSLINUX
# flashrom --programmer internal:boardmismatch=force -w apu2_v4.6.9.rom

flashrom v0.9.8-r1888 on Linux 3.16.6-tinycore (i686)
flashrom is free software, get the source code at http://www.flashrom.org

Calibrating delay loop... OK.
coreboot table found at 0xdffae000.
Found chipset "AMD FCH".
Enabling flash write... OK.
Found Winbond flash chip "W25Q64.V" (8192 kB, SPI) mapped at physical address 0xff800000.
This coreboot image (PC Engines:PC Engines apu2) does not appear to
be correct for the detected mainboard (PC Engines:PCEngines apu2).
Proceeding anyway because user forced us to.
Reading old flash chip contents... done.
Erasing and writing flash chip... Erase/write done.
Verifying flash... VERIFIED.