For sale 128K Core RAM Industrial PDP 11/40 Massbus System - test-drb@ccmp.vtda.org

31 Oct 2016

In a message dated 10/31/2016 2:31:02 P.M. US Mountain Standard Time,  
tmfdmike at gmail.com writes:

On Tue,  Nov 1, 2016 at 10:15 AM, william degnan <billdegnan at gmail.com>  
wrote:
...
 >
> Find a copy of the PDP-11 systems  handbook!  Say 1978, 80 and 82  versions
...
   and
 see  the difference.  Never mind the Unibus, Qbus, PRO, and PDT  flavors.

  Allison

>   thanks Ed Sharpe   _www.smecc.org_  (http://www.smecc.org)
>
>
> 
  Here is a thread I posted on my site, with link to the first printing  of
 the PDP 11 brochure.  The first PDP 11 models had no "/nn" on  the front
 panel.. see for yourself.

  http://vintagecomputer.net/browse_thread.cfm?id=593 
Mine is a very  early example - number 636 IIRC - and it just says
'pdp-11' on the  front:

http://www.corestore.org/1120-1.jpg

Mike

http://www.corestore.org
'No  greater love hath a man than he lay down his life for his brother.
Not for  millions, not for glory, not for fame.
For one person, in the dark, where  no one will ever know or see.'

Mike OK  that  is a great indicator!  
serial# and date wise!  Ed#