Ok so, I have no experience with the hardware, playing or developing, but the music in this game has convinced me, I think, that maybe it's time to look into it! It's so lovely and appropriate to the theme.
Ah, yes. The AY-3-8912 from General Instruments/Microchip Technology is the 'musical' heart of many a home computer, ZX Spectrum, MSX, Amstrad CPC, for example. Even some arcade machines used it back in the day, 1942, Frogger, and more. There is a Wikipedia page for it here.
