Hello Igor,

Interesting emails. I should admit. For sure worth exploration, especially GIT Hub application. :-)

Michal (finally, I got your correct name, idiot me),

I'll come back to this thread. I am last 3 days very busy. Very very busy, but, certainly, I'll get free time, and will explore this opportunity, since it makes my old, not so sharp anymore eyes very wide!

Thank you all,
Zoran

On Wed, Feb 8, 2017 at 10:46 PM, Igor Skochinsky via coreboot <coreboot@coreboot.org> wrote:
P.S.


 Hello Michal,

The T400 BIOS is in a Pre-UEFI Phoenix FFV format. You can use phoenix_extract.py[1] to extract modules from it.

To go back to Lenovo BIOS you can try the following:

1) download an update from lenovo (e.g. 7uuj49us.exe)
2) unpack it with innounp


2b) apparently innoextract [2] can be used on non-Windows platforms

[2]: http://constexpr.org/innoextract/


 3a) take the FL2 file (e.g. $01B8100.FL2),  cut out from 0x200000 to 0x400000 and use the resulting image to replace coreboot in the BIOS region (end of flash).
3b) take the FL1 file  (e.g. $01B8100.FL1), unpack it with bcpvd from [1] and flash the result (it's a complete flash image with descriptor and ME) after cutting it at 0x400000
4) according to the descriptor in unpacked FL1 , the GbE region is at 001F6000 - 001F7FFF, so that's the most likely place for storing the MAC address. I'm not sure why your desc.rom lists 5F6000 - 005F7FFF... I think that's outside the flash chip.

[1]: https://github.com/coreboot/bios_extract

-- 
WBR,
 Igor                            mailto:roxfan@skynet.be




-- 
WBR,
 Igor                            mailto:skochinsky@mail.ru

--
coreboot mailing list: coreboot@coreboot.org
https://www.coreboot.org/mailman/listinfo/coreboot