You're probabaly better leaving VMS on it for now. Ultrix didn't run on 
these from what i know, and the buses are weird. There were two Qbus 
adaptoations for these, both of which sucked. One worked properly but 
took the machine to a crawl while it was being used, and the other was 
made pretty much only to work with a couple of boards. The mbus is a 
strange bus, and only in this series of VAX was it ever used. I have a 
3520 as well, albeit in very poor physical condition, and it's a strange 
looking machine.. :) if you could find docs for it, and for the mbus, im 
sure netbsd _could_ be ported to it, though! :-)

isildur

On Wed, 8 Nov 2000, NetBSD Bob wrote:

> Well, after a long dry spell, I seem to have had fortune keying out on a
> number from the back of the case on my VAXencritter.
> 
> The number was VS60-S.
> 
> It returned from a hardware page the following:
> 
> VAXstation 3520 Firefox Dual CPU KA60 CVAX with Mbus and Qbus!
> 
> OK, so anyone know anything about this strange VAXencritter?
> 
> I would luv to get NetBSD (or Ultrix on it), but have no success
> getting the thing to boot from prom very well, except on its one
> VMS 6.1 RZ56 disk.
> 
> Any insights or suggestions appreciated.
> 
> Thanks
> 
> Bob
> 
> EUREKA!
> 
> (OK, so I know know what it is, what can we do with it?)
> 
> 
> 
> 
>