Tim Shoppa <shoppa@alph01.triumf.ca> wrote:
> The differences are large enough that at best, the resulting system
> doesn't work.  More likely is that you'll let the magic smoke out of
> lots of chips, and it's entirely possible for the machine to burst into
> flames.  (Yes, I've seen all the above happen.)
   
   and
   
   Allison J Parent <allisonp@world.std.com> wrote:
> Unibus is non-multiplexed, Qbus is multiplexed.  They are physically
> and timing wise incompatable.
   
   This is what I have always been thinking. The reason I have asked this
question is because someone has once said right here on port-vax that
he/she had some strange card in his/her Q-bus MicroVAX, and Tim identified
it as some UNIBUS card.
   
   I'm still wondering whether UNIBUS has a 22-bit version or not. And what
about Q18 vs. Q22? How compatible are these two?
   
   Sincerely,
   Michael Sokolov
   Phone: 440-449-0299
   ARPA Internet SMTP mail: sokolov@alpha.ces.cwru.edu