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?).

Regards,

Javi.

Hi Javier,

On Wed 19 Apr 23, 01:32, Javier Bizcocho wrote:

Hello guys,

Just a soft bump.

No one has any comment about this? :).

So if what you're trying to do is to flash from the live system running on
said motherboard, you probably need some kind of board enable code to allow
write/erase access. See https://www.flashrom.org/Board_Enable

This can be as trivial as toggling a GPIO, but the less trivial part is usually
to find out which GPIO that is.

Quoting the datasheet for the chip about security:
```
– Hardware Write Protect pins for block protection
– Register-based Read and Write Protection
– Individual Lock Register for each 4 KByte sector
```

So you might want to take a look at the status of the two latter points as well.

Cheers,

Paul

Kind Regards,

Javi.

On 17/04/2023 14:34, Javier Bizcocho wrote:

Hello guys,

I'm trying to flash a modded bios on my motherboard. The computer is a
Dell SC1435 and the flash chip in question "M50FLW080A" is supported by
the tool already, but just partially.

It looks like it can read the bios, but when reading or erasing it
always fails (and every now and then it even forces my PC to reboot). My
server is running FreeBSD 13.1, but I've also tried with Ubuntu (same
result). Even though it fails to erase / write the chip was never
altered at all, so I wonder if there is any kind of protection on it.


Is there any logs that I can extract from the tool itself? I'd like to
avoid the need to de-soldering the chip in order to flash it :).


Any thoughts?


Thank you in advance,

Javi.

_______________________________________________
flashrom mailing list -- flashrom@flashrom.org
To unsubscribe send an email to flashrom-leave@flashrom.org