And... yeah, it works. The only thing that gave it even the slightest pause was the Sound Expander, and only because I had to manually disable the internal virtual "cartridge" to route the signals properly - a quick flip in the settings menu, no more than that.
The title screen of Mayhem in Monsterland, an impressively high-speed platformer released relatively late in the original Commodore 64's commercial run.
The output of a Simons' BASIC program to plot a sine wave, showing a dotted line tracing the wave on a white background with a blue border.
A screenshot of Simons' BASIC, a cartridge-based expansion to Commodore BASIC 2.0 which adds 114 new commands. A short program to plot a sine wave in high-resolution mode is visible.
A screenshot of the software included with the Commodore SFX FM Sound Expander, which turns the Commodore's keyboard - or an optional full-size external piano-style keyboard - into a synth. Musical staves are visible in the background, while a yellow "Synth Voices" menu provides a list of sounds to pick.