On Thu, 31 Aug 2000, Matthew Jacob wrote:

> > Matthew Jacob <mjacob@feral.com> writes:
> > 
> > > Oh, yuck. It sounds like it overwrote NVRAM. This is bad.
> > 
> > :)  Yeah, that's kind of what I figured, too.
> > 
> > Any thoughts on fixing it?  I can do a set-defaults, but the ether
> > address is still 0.
> > 
> > I hope I don't have to leave this box in this condition...
> 
> Now, I really don't know the internals of Ultras that well about this... for
> the older Sparc machines (e..g, SS2, IPC, etc.), this stuff is stored on the
> MOSTEK Timer/NVRAM pluggable chip. Because this also contains the hostid for
> the machine, it's been made very non-obvious as to how to change it or rewrite
> it (which ultimately was stupid, because anyone with an ounce of kernel
> hacking skills can use adb -k on solaris and (re)set the hostid so that
> licence keys match to what you want).
> 
> Somewhere in info/URLs is the sequence that you can type into the prom to
> reset things for an SS1 and an SS2. I have no idea about Ultras. Hopefully
> Eduardo will tell me I'm completely nuts and something else can be done to
> help you.

Ultras use a slightly newer model of the same MOSTEK chip.  It's a MK48T59
instead of a MK48T08.

Eduardo Horvath