could be part of a 4200 or a VM http://www.ricomputermuseum.org/Home/small-systems-at-ricm/cpt-4200-series-typewriter
since the date codes are early, i'd guess the 4200 Mike might be able to ID the boards On 10/6/18 10:48 AM, Jules Richardson via cctalk wrote: > > I borrowed a pile of scrap 1970s-era PCBs from my local recycler yesterday, > just to make sure there was nothing > important among them before they go off for processing. Among them are six > boards branded as CPT, which I assume (as I'm > in MN) is the CPT Corporation that was in Minneapolis. > > The double-sided boards are organized in five rows of five ICs, with 44-way > edge connectors and IC date codes in the > 1973-1977 range. I seem to have p/n's 910012, 910014, 910015, 910017, 910018 > and 910022. > > In addition to this there's a smaller board which references "deck 1 heads" > and "deck 2 heads", and appears to have a > p/n of 910025. > > Does this ring any bells with anyone? The Wikipedia entry for CPT mentions > the 'VM' machine in 1976 with dual tape > units, so I wonder if they're from one of those... if so, I'm curious if > there are any surviving intact examples out > there (or other info, there doesn't appear to be any CPT stuff on bitsavers) > > cheers > > Jules
