ASUS M2N-MX board enable needed?

[Márton Miklós]

Hello all,

I have tried to flash an Asus M2N-MX board, and it failed (if I think it 
well it needs board enable patch).
The chip is a SST49LF040B as the flashrom detected. (Checked physically)

Product page can be found here:
http://www.asus.com/Motherboards/M2NMX/

Latest BIOS can be found here:
http://dlcdnet.asus.com/pub/ASUS/mb/socketAM2/M2N-MX/M2NX1004.zip

I have forgotten to save lspci and superiotool logs, let me know if it 
needed.

Thank you for your help in advance!

[Stefan Tauner]

On Tue, 10 Mar 2015 00:24:20 +0100
Márton Miklós  wrote:
> Hello all,
>
> I have tried to flash an Asus M2N-MX board, and it failed (if I think it 
> well it needs board enable patch).
> The chip is a SST49LF040B as the flashrom detected. (Checked physically)
>
> Product page can be found here:
> http://www.asus.com/Motherboards/M2NMX/
>
> Latest BIOS can be found here:
> http://dlcdnet.asus.com/pub/ASUS/mb/socketAM2/M2N-MX/M2NX1004.zip
>
> I have forgotten to save lspci and superiotool logs, let me know if it 
> needed.
>
> Thank you for your help in advance!

Hello,

yes indeed it needs a board enable and we tried (unsuccessfully) to come
up with one: http://patchwork.coreboot.org/patch/3710/

The pipermail link mentioned in the patch has changed since then. It
should be
http://www.flashrom.org/pipermail/flashrom/2010-February/002279.html
I can not remember what we tried... maybe it is only a matter of
changing "raise" to "lower" or we got the wrong gpio pin... I don't
know. Feel free to play around/reverse engineer and please report back
any findings ;)

[Márton Miklós]

> > On Tue, 10 Mar 2015 00:24:20 +0100
> > Márton Miklós  wrote:
> > > Hello all,
> > >
> > > I have tried to flash an Asus M2N-MX board, and it failed (if I think it
> > > well it needs board enable patch).
> > > The chip is a SST49LF040B as the flashrom detected. (Checked physically)
> > >
> > > Product page can be found here:
> > > http://www.asus.com/Motherboards/M2NMX/
> > >
> > > Latest BIOS can be found here:
> > > http://dlcdnet.asus.com/pub/ASUS/mb/socketAM2/M2N-MX/M2NX1004.zip
> > >
> > > I have forgotten to save lspci and superiotool logs, let me know if it
> > > needed.
> > >
> > > Thank you for your help in advance!
> >
> > Hello,
> >
> > yes indeed it needs a board enable and we tried (unsuccessfully) to come
> > up with one:http://patchwork.coreboot.org/patch/3710/
> >
> > The pipermail link mentioned in the patch has changed since then. It
> > should be
> > http://www.flashrom.org/pipermail/flashrom/2010-February/002279.html
> > I can not remember what we tried... maybe it is only a matter of
> > changing "raise" to "lower" or we got the wrong gpio pin... I don't
> > know. Feel free to play around/reverse engineer and please report back
> > any findings ;)

Hallo Stefan,

I have tried out it8712f_gpio31_raise patch, but it did not worked. I 
have measured the #TBL pin voltage, and it was pulled to GND during my 
trials.
As a brute force attempt I have added a loop to go through the GPIOs 
from 1 to 63 during the board enable, but as I have seen there are 
multiple checks to prevent doing something silly with those pins. This 
attempt was neither lead to success.

I had to give the board back to the owner, but I might have access to it 
in the future.

Lately I had an idea that I will use a DMM (digital multi meter) in 
continuity measurement mode and probe through the superio pins  and the 
#TBL pin.

Regards,
Miklós Márton