The Yamaha YM2151, also known as the OPM (FM Operator Type-M) is an eight-channel, four-operator sound chip. The chip was first used in 1984 with Atari's Marble Madness (ARC) and continued to be used heavily throughout the 1980s. Some of its most notable platforms include the Sharp X1 and Sharp X68000 home computers.
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|YM2151 Datasheet||Download - (info)|
|YM2151 Synthesis||Download - (info)|