General Robotics Micro? GRC 11/X3 - test-drb@ccmp.vtda.org

2 May 2001

On May 2, 16:29, ip500 wrote:
...
          Interesting find at the VaTech auction last
weekend. I never heard of
...
  General Robotics Corp ... anyone else?? The size of a
rack mount micro
 but it uses DEC PDP-11 cards [has a M-8186] plus a bunch of GR
 propriatary
 cards. Odd but neat. Any info always appreciated.
        Craig 
GR made a few cards for QBus systems.  I have a GR "RX02" which has a
50-pin Shugart interface and works with ordinary 8" drives.  It's a
dual-height card.  It's also capable of handling dual-sided "RX03" format,
and I think up to 4 drives.  There's an on-board bootstrap option.  Plessey
made (badged?) a very similar (if not identical) board.  I think I have the
manual somewhere.  These boards were quite popular.  I've seen one built
into a single 8" drive case with an M8186 (11/23) and an M8047 (MXV11-A).
I also have a GR DHV11, 16-channel QBus multiplexer, with channel zero
mapped to the console address.  It's a quad-high and needs a special
3U-high distribution box, which has (IIRC) three stacked PCBs containing a
Z80 and some "stuff".  Unfortunately mine is faulty :-(  I don't have any
docs, all I know is that it appears at addresses 160020-160036 (DHV11) and
170500-170502 (DM11 multiplexer) as well as 177560-177566 (console).
 According to my register dump, that is.
--
Pete                                            Peter Turnbull
                                                Network Manager
                                                University of York