The "C64" demo "Freespin" wires the drive's data cable directly into the monitor's data cable to play a demo (including audio!) without an actual C64 involved a

The "C64" demo "Freespin" wires the drive's data cable directly into the monitor's data cable to play a demo (including audio!) without an actual C64 involved at all: https://www.youtube.com/watch?v=zprSxCMlECA https://www.youtube.com/watch?v=zprSxCMlECA