Samsung 550 Chromebook own Coreboot

[John Lewis]

Hey Guys,

Thanks to some pointers that Ron Minnich gave me a few weeks back, I've 
been able to debrick my Samsung 550 Chromebook. However, during the time 
I waited for my Bus Pirate I started thinking it might be nice to build 
my own Coreboot, with a SeaBIOS payload. Now I have a build, but 
flashing it with the ChromiumOS version of Flashrom (in the hope of not 
overwriting OTP areas) still gives me a brick. I haven't included the ME 
firmware or the descriptor, and I'm guessing this is the problem? If so, 
how can I extract these from my original copy of the BIOS (I see they 
are in there using fmap_decode, but using the syntax for extracting the 
BOOT_STUB in the VMX hacking doc on the Chromium website doesn't give me 
what I expected. Also do I need a VGA BIOS?

Thanks in advance.

[ron minnich]

you need a vga bios for now. You must have the ME firmware.

Try this:
make menuconfig
go to general setup
enable the 'third party binaries' menu item (or whatever it's called)

they should now get downloaded automagically.

Do a cbfstool  build/coreboot.rom print
before and after this step, and it should look different.

ron