Mark Emmer sent me this link: https://www.instructables.com/id/DEC-H-500-Computer-Lab-Reproduction/
It's a step by step guide, with parts and 3D print files, for building a reproduction of the late 60s DEC "Computer Lab" teaching toy. The site also includes the PDF files from the original.
An interesting project for the do-it-yourselfers on this list. /Bob Supnik _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh