One idea is: https://hackaday.com/2017/05/05/converting-parallel-port-cncs-to-usb/ https://hackaday.com/2017/05/05/converting-parallel-port-cnc... Plus there a

One idea is: https://hackaday.com/2017/05/05/converting-parallel-port-cncs-to-usb/ https://hackaday.com/2017/05/05/converting-parallel-port-cnc... Plus there are a bunch of off the shelf solutions on Amazon (YMMV).