Most likely standard gcode. We still run CNC machines from that era. At least one of our machines dates to 1979. While it would take a lot of tape there is not

Most likely standard gcode. We still run CNC machines from that era. At least one of our machines dates to 1979. While it would take a lot of tape there is nothing that I can see that makes those hard to do. (Ours no longer use tape but a drip feed from a parallel port.)