Hi Bernd,
On 18.01.22 14:41, bernd1-1@web.de wrote:
So, after having made clear the corresponding points do you think that the following hardware will be sufficient to flash the coreboot/SeaBIOS ROM to the chip of my ThinkPad X220 (notebook version, not tablet version):
Raspberry Pi with keyboard and screen Pomona or SOIC8 programming clip 8 jumper wires/dupont wires that fit the clip 10 to 20 cm each PSUs to power everything
tl;dr Go!
If you want to be 100% sure, you should open your ThinkPad and check that your BIOS flash is indeed in a SOIC-8 package, and that there is only a single flash chip. In theory it can be different, but so far people have only encountered a single SOIC-8 chip, AFAICT.
Minor corrections: Pomona is the name of the manufacturer (of the better clips). You only need 6 wires; /HOLD and /WP pins of the flash are already properly connected by the mainboard.
Nico