Are you sure??
ASUS KFSN4-DRE?
Internal flashing should work just fine, even if you are currently booting
the proprietary firmware.
Libreboot currently lacks documentation for externally re-flashing an LPC
flash chip. However, these boards have the flash chip inside of a PLCC
socket, and it is possible to hot-swap the chips. If you want to back up your
known-working image, simply hot-swap the chip for one that is the same
capacity, after having dumped a copy of the current firmware (flashrom -p
internal -r yourchosenname.rom), and then flash that chip with the
known-working image. Check whether the system still boots, and if it does,
then it should be safe to flash the new image (because you now have a backup
of the old image).
Keeping at least one spare LPC PLCC chip with working firmware on it is
highly recommended, in case of bricks.
DO NOT hot-swap the chip with your bare hands. Use a PLCC chip extractor.
These can be found online. See
http://www.coreboot.org/Developer_Manual/Tools#Chip_removal_tools
Do check the HCL entry: ../hcl/kfsn4-dre.html
https://libreboot.org/docs/install/#flashrom
It's probably not up-to-date since it seems external flashing is possible
now, yet what I read says that even if I'm booting the proprietary firmware,
internal flashing should work.
I went into all this hoping I wouldn't have to do any external flashing :(
