Thanks to an awesome blog post over at Biosrhythm, I now have RS232 serial communication to/from the Commodore 64. I built what is essentially the exact same adapter that he used. The only minor difference is mine is based on the MAX3232 chip.
I also ran some serial communication to the printer via serial from my PC. Just testing, and it seemed to work perfectly.
I’m “this close” to having this work, unfortunately I don’t have any Male DB9 connectors floating around and can’t find my stash of serial gender changers. I’ll pick some up after work tomorrow and I should be up and running at that point. Updates to follow. 🙂