General Instrument AY-3-8910

The AY-3-8910 is a 3-voice Programmable Sound Generator (PSG) designed by General Instrument, initially for use with their 16-bit CP1610 or one of the PIC1650 series of 8-bit microcomputers. In the 1980s the AY-3-8910 and its variants became popular chips in many arcade games, and home computers, such as the Sinclair ZX Spectrum 128. It was also produced under license by Yamaha as the YM2149, which was used in the Atari ST.