11/23+ box with Microvax Memory

Glen Slick glen.slick at gmail.com
Mon Mar 7 13:10:35 CST 2016

On Mon, Mar 7, 2016 at 10:25 AM, jwsmobile <jws at jwsss.com> wrote:
> I see on the usual site, an 11/23 box with a couple of random boards, one of
> which is an M7608 board.  This is a Microvax memory board.
> I wonder if one can build up a Microvax in that backplane, or if that is not
> recommended.  It would obviously be an 18 bit backplane.  The backplane is
> H9276A.
> The auction also has a M9047 Bus grant card in it, so is essentially just
> the box.  But I'd never seen Microvax parts plugged into those backplanes,
> and it made me think.

The H9273 is a 9 row Q18/CD backplane and the H9276 is a 9 row Q22/CD
backplane. I don't see why you couldn't build up a QBus MicroVAX in an
H9276 backplane. You'd have to hack up something to mount the console
bulkhead panel in a BA11 box instead of the standard BA23 box.

More information about the cctech mailing list