CPT boards

On 10/06/2018 01:40 PM, Al Kossow via cctalk wrote: Possibly, although there are quite a few ICs with 1976 and 1977 date codes which don't give the impression of being repair parts - I'm not sure what the lifespan of the 4200 was. Of course the Wikipedia article is quite light on details though, so perhaps there were other models not mentioned, or tweaks to the 4200's design to keep it 'current' as time went on. I've dumped images of the six boards temporarily here: http://www.classiccmp.org/acornia/tmp/c1.jpg http://www.classiccmp.org/acornia/tmp/c2.jpg http://www.classiccmp.org/acornia/tmp/c3.jpg and finally the smaller "tape board" is bottom-right in this group of misc.: http://www.classiccmp.org/acornia/tmp/c.jpg (I've no idea what the others are in that photo. Top little one is Sperry. There were lots of "industrial" boards in the scrap pile, though - CNC control boards and the like - so quite possibly not computer-related at all) cheers Jules