Concurrent Computer Corporation

Pete Lancashire pete at
Sat Jul 30 13:54:03 CDT 2016

Remove the part and set it in a device programmer ?

On Sat, Jul 30, 2016 at 11:35 AM, Pontus Pihlgren <pontus at>

> On Sat, Jul 30, 2016 at 01:58:49PM -0400, alexmcwhirter at wrote:
> > I know nothing about this machine in particular, but i know a decent
> amount
> > about other unix machines of the era. Chances are that the copy of RTU on
> > that box is licensed to the serial / id number programmed in nvram.
> Because
> > the nvram is dead, those numbers no longer match and the OS panics from
> an
> > invalid license.
> I think you may very well be right. I noticed that the "show" command in
> the console displays the serial number. I went back and compared it with
> the serial number printed on the back of the machine. Well, it doesn't
> match one bit. So.. I either need to figure out to reprogram the NVRAM
> (simply set serial_number doesn't work and the manual lists the
> environment variable as "permanent") or I suppose I could figure out
> where on disk the serial number is.. but it doesn't sound easy.
> > The TOD clock typically part of the nvram chip and loses
> > it's value after every reset. If i had to guess, i would say replace the
> > battery / nvram chip (if it's a self contained chip like the old sun
> boxes)
> > and see if you can get enough data together to reprogram it. Whether or
> not
> > the machine in question has a facility to do that like the old sun's do
> i am
> > not sure.
> I've battled the NVRAM death and corresponding TOD problems in SGI, SUN
> and DEC machines before but only succeded because the "set"
> functionality of the console was enough... this time I'm not so sure.
> /P

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