Also look up old issues pf Microcomputer Digest, circa 1974 to 1976, same era as the MOS catalogues, as I am pretty sure the various processors were covered in

Also look up old issues pf Microcomputer Digest, circa 1974 to 1976, same era as the MOS catalogues, as I am pretty sure the various processors were covered in there. Everyday Electronics or Practical Electronics, or one of those variants also included schematic and detailed instructions on using the "Pong on a chip" devices to make your own home console, though I don't recall which microprocessor they used.