I can report that flashrom  v0.9.0-r670 works with an ASUS KFN4-D16 to reflash the mainboard bios chip

I flashed an ASUS ROM (3.02) and halted the computer and rebooted, computer booted up as normal.

next stop is to flash coreboot on this board, I hope to report back in about one month

good luck with your project,

Tom Ward