[MinnowBoard] How can I set MAC address in EFI shell!?

Dave Smith smith at wiresareobsolete.com
Fri Jul 10 17:59:39 UTC 2015


This was true on one of my boards as well.
I was told it was because it was one of the first production boards built. Still waiting on a resolution/utility to fix it. 

-- 
Dave Smith, PE
@devunwired


On Friday, July 10, 2015 at 11:57 AM, Gerard Bucas wrote:

> Yes - all zeros!
> 
> Anything I can do to fix this!?
> 
> 
> 
> > On Jul 10, 2015, at 7:56 PM, John 'Warthog9' Hawley <warthog9 at eaglescrag.net (mailto:warthog9 at eaglescrag.net)> wrote:
> > 
> > > On 07/10/2015 10:27 AM, Gerard Bucas wrote:
> > > Somehow my MAC address on one of my minnowBoard MAX's got screwed up.
> > > 
> > > Does anyone know how to write a new address into nvram (or wherever it is
> > > stored) using the EFI shell?
> > > 
> > > I am using latest 0.81 firmware.
> > > 
> > > While on this topic, how is the MAC address initially created during
> > > manufacturing (is there some utility the factory runs to set the MAC address
> > > for each new minnow board produced)? Also where exactly is it stored?
> > > 
> > > My firmware got corrupted (so I "bricked" this board) and had to use my
> > > DediProg SF100 to write a new (0.81) firmware to the flash chip. After that
> > > it boots fine and everything seems back to normal but somehow my MAC address
> > > got screwed up in the process.
> > > 
> > > I own a number of minnowMAX boards and have noticed that the MAC address is
> > > normally "retained" even when one completely erases and re-writes the flash
> > > memory chip (using a DediProg SF100), so this says to me that the MAC
> > > address is not stored in the same flash memory chip that contains the
> > > firmware/BIOS.
> > > 
> > > Would like to learn more about this...
> > 
> > The MAC address for the NIC isn't stored in the nvram firmware, and the
> > process of writing it into the NIC itself is permanent. What exactly
> > are you seeing with your MAC address? Is it all 0's?
> > 
> > - John 'Warthog9' Hawley
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