The Yamaha YM2149 reference article from the English Wikipedia on 24-Apr-2004
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Yamaha YM2149

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The YM2149, also well-known as the AY-3-8192, was a 3 voice sound chip created by Yamaha Corporation which was used on, among other platforms of the 1980s, the Intellivision video game console and the MSX, Atari ST, and Sinclair ZX Spectrum+ 128 home computers.

Related chips are AY-3-8910, AY-3-8912 and AY-3-8913.

External links