2 May
2001
2 May
'01
1:57 p.m.
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