<div dir="ltr">Hello coreboot community,<br><br>I'm 23 years old and I'm studying computer science in germany.<br>I want to flash coreboot on my Lenovo T420 with Raspberry Pi's SPI, read a lot of content on <a href="http://coreboot.org" target="_blank">coreboot.org</a>, but I would have some more questions.<br><br>1) About VBIOS:<br>I
have Sandy Bridge with integrated graphics (Intel Corporation 2nd
Generation Core Processor Family Integrated Graphics Controller) so it
wouldn't be necessary to build the coreboot.rom with a VBIOS, I want to
boot with SeaBIOS without graphics. But if I don't add the VBIOS, what
is used after the boot? For example I dumped the current vbios.rom
of the VGA compatible controller in linux with <br><br>echo 1 | tee /sys/devices/pci0000\:00/0000\<wbr>:00\:02.0/rom<br>cat /sys/devices/pci0000\:00/0000\<wbr>:00\:02.0/rom > vbios.rom<br><br>and disassembled it with <br><br>ndisasm -k 0,3 vbios.rom | less<br>strings vbios.rom | less<br><br>Where is this current vbios stored and for what is it needed?<br>Can I replace it with coreboots VBIOS? Or is it even not necessary and its deleted, if I use coreboot without VBIOS?<br><br>2) About proprietary BIOS<br>Is
it possible to download a "full" BIOS (with descriptor, me, ...), like
it is stored on the mainboard flash chip?, because on the lenovo support
webpage I can only find BIOS-Updates, with an empty offset for the
descriptor, the intel me and the GbE followed by the BIOS. And this .FL1
file is even biggen then 8 MiB, maybe because it also includes the EC? <br><br>3) About the EC<br>Is
it possible to create a full EC, which I can flash on the mainboard
chip with the raspberry pi?, or does an open source EC already exist for
the T420 (I just found one for T400 on libreboot). Is the EC store on
another chip?<br><br><br>I can write a tutorial for the webpage about flashing the T420 with raspberry pi's SPI, if required let me know.<br><br>Additionally I try to use the me_cleaner to reduce the ME code to a minimum. <br><br>Thanks in advance!<br><br>Regards Robert<br></div>