[coreboot] How to flash Coreboot on a Thinkpad T430s

[kitestramuort]

The T430s is supported by coreboot, however there's very little
documentation on the flashing procedure itself. I couldn't even
identify the BIOS chip on the motherboard. From what I've read the chip
is not SOIC8, unlike those on the non-S T430 and X230, therefore the
raspberry pi method should not be applicable. Is desoldering the chip
the only way to install Coreboot on this machine? Is there a
guide/howto somewhere?

Thanks