I think he's asking about "laboratory modules" -- the *original* DEC products from 1957 or so. You snapped the lab modules into a power backplane (power supply was one of the "DEC Building Blocks") and connected the logic elements via patch cords. The power pins aren't documented in my 1960 dec logic handbook, and they don't seem to be documented in Bell's "Computer Engineering" either, so I assume you need to find a "DEC Building Blocks" technical bulletin or reverse engineer one of the lab modules -- this might help: http://www.ulib.org/webRoot/Books/Saving_Bell_Books/Computer_Engineering/00

-- Doug On Tue, 23 Apr 2002, Zane H. Healy wrote: > Do the modules look like they'd plug into a Q-Bus or Unibus backplane? If > so they can't be much older than about 35 years old I believe (if that). > DEC itself I was started in '58, IIRC. Joe's book might have some of the > info you need, there are a whole slew of Logic Handbooks from the late 60's > through the late 70's (towards the end they changed the name). > > Zane > > > > > > John, > > > > This is a hell of a coincidence! I JUST posted the message below to a > >fellow CC Lister. The book is dated 1971 so it may not cover what you're > >looking for IF your modules are really 45 years old. Unfortunately the > >book is really more of a catalog so there's little pin out info except > >for some of the flip chip modules. > > > > > > "I found a copy of "Digital Logic Handbook 1971" while cleaning around > >here today. Digital as in Digital Equipement Corp. Need it? It seems to > >be a data book of modules (M series Logic Modules, W series Special

> >Logic Boards, A series Analog modules, Lab Series and K Series Control