A decent implementation with discrete logic and a dumb UART: https://retrocomputing.stackexchange.com/questions/8903/parallel-to-serial-conversion https://retr

A decent implementation with discrete logic and a dumb UART: https://retrocomputing.stackexchange.com/questions/8903/parallel-to-serial-conversion https://retrocomputing.stackexchange.com/questions/8903/para... Probably cheaper for most hobbyists to use an Arduino like so: https://hackaday.io/project/18140-serial-to-parallel-printer-interface https://hackaday.io/project/18140-serial-to-parallel-printer... Safety: Be aware RS-232 (specified in rev. D) must tolerate voltage levels of ± 25V.