Marc! You
are alive.

You're correct about the gibberish, but on that old cabinet you have to match the jumper on the CPU board to the connection speed you put in the terminal program. 9600 was SciFi when that cabinet came out. As I recall the settings are 300, 1200, 2400, 4800, and if you just can't get a good connect you drop to 300 baud to troubleshoot. It's brutal.
Ken shot her a PM at my request last night with detailed instructions including baud, parity, and other settings.