22 Nov
2006
22 Nov
'06
3:15 a.m.
J Blaser wrote:
I've collected a number of Q-bus boards for
PDP-11s and/or VAXen that I'm trying to
identify and locate documentation for. Poking around the web, checking bitsavers.
org
and Manx, and looking at the Q-bus field guide have so far turned up nothing for
me. I'd like to ask all of you Q-bus experts for some input. I've cobbled
together a
webpage with some images here:
http://www.rogerwilco.org/mystery_boards
At this moment, I'm most interested in information and documentation on the
Clearpoint Q-BUS 11B. I'd like to use this in a PDP-11/23+ or 11/73, hoping to get
Ultrix-11 or BSD2.9 running.
All comments are welcome on- or off-list.
Thanks!
J
Well, on the CompuServe board, there is a 68B09 which is (I believe) an
8MHz version of the 6809. There's a 68B40 which I think is a CTC
(counter/timer), and quite a lot of static RAM.
Nothing jumps out at me as being a line-driver, which suggests they're
not serial ports. If you notice, the pins are labelled oddly, so using
their format pin one is the leftmost of the row of four. From that,
pins 4 and 7 on all the top row of sockets (and possibly the bottom row)
are all connected together, and pins 9 and 3 on each socket are
connected to each other. It looks like a multi-layer board so visually
tracing the pins may not be helpful.
Gordon.