PDP-11 ID page, a few images needed

John Forecast john at forecast.name
Thu Jan 24 10:32:46 CST 2019


> On Jan 24, 2019, at 9:55 AM, Paul Koning via cctalk <cctalk at classiccmp.org> wrote:
> 
> 
> 
>> On Jan 23, 2019, at 5:37 PM, Noel Chiappa via cctalk <cctalk at classiccmp.org> wrote:
>> 
>> In response to a request a couple of years back from Cindy, I've been slowly
>> working on a page to help scrappers identify PDP-11's, and give them an idea
>> what to look for. I have it _mostly_ done:
>> 
>> http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/PDP-11_Models.html
>> 
>> Comments/error-checking etc welcome. Also, I still need images of a few
>> things: -11/60 and -11/94 front consoles, the original LSI-11 card, the
>> KDJ11-E, and most of the DEC QBUS boxes.  (Yeah, I could try looking for free
>> images, I've been busy!)
>> 
>> Any help gratefully received!
>> 
>>   Noel
> 
> Was the 11/74 ever shipped?  I know of two machines that were called that, both 11/70 derivatives: the multi-processor machine that RSX-11/M supports, and an 11/70 with CIS instructions added, seen in the RSTS lab in Merrimack NH in the early 1980s.
> 
> 	paul
> 
No. As far as I know there were only 2 11/74’s in use; the quad machine in Spit Brook (CASTOR:: and, when split into 2 duals the other was POLLUX::) and a dual in Tewksbury, later LKG (ELROND::). After the project was cancelled there were a number of already built 11/74’s which were stripped down to single CPUs and made available internally for development - that may be what you saw in the RSTS lab.

  John.




More information about the cctech mailing list