Thank you very much guys,

Another potential lead is the bios updater itself. I have the DOS version for this board, that contains the BIOS embedded into it. Perhaps I can get some extra information if I manage to find exactly the part where the chip is unlocked (hopefully is not obfuscated).


Javi.

On 20/04/2023 12:08, Luc Verhaegen wrote:
On Wed, Apr 19, 2023 at 08:51:42PM +0100, Javier Bizcocho wrote:

Hello Paul,

Thank you very much for the advice, I'll have a look at how to enable this
"board enable code".

Perhaps I can have look at the code of other chips of similar "LPC/FWH"
types (some Winbond?).

Here is the phoronix report on the talk i gave at fosdem in 2010.

https://www.phoronix.com/review/fosdem_2010_flash

Video/Audio should have been recorded but never got released. This was 4 
years before fosdem started offering their full video coverage (which is 
an insane feat each and every year).

The slides include 3 drawings which should give you an idea of what is 
going on.

Dell has some weird tools to flash the bios on this machine. It cannot 
be excluded that these tools do more than just get an image on the flash 
chip, so your mileage may vary.

Luc Verhaegen.