[SPARCbook] Changed MAC address / Can't boot normally

[Markus Mayer]

Hi,
 
> Go to the open-boot prompt and set things up again. You lost some
> important settings. At least the host id and boot step has been cleared
> as you found out.
> 
> Hugo.

I'd happily do this if I just had the slightest idea of what to change. The
boot-device is set up correctly (otherwise the 'boot'-command would not
work).

I tried resetting everything to the factory-defaults -- it didn't help.
Neither the 'Technical Reference' nor the 'User's Guide' mention this
problem. 

May be somebody can give me a hint. Thanks.

Markus