Wow. I didn't realize that an analog synthesizer-in-a-chip was a thing that far back. Pretty remarkable. All the basics are there: oscillator, noise generator,

Wow. I didn't realize that an analog synthesizer-in-a-chip was a thing that far back. Pretty remarkable. All the basics are there: oscillator, noise generator, filter, envelopes, lfo. Although it's not quite everything. The VCF is for noise only, and there's no way to insert a filter into the VCO audio path externally. However, that pretty much defines the "chip tune" genre.