YM2151 , also known as OP-M (short for FM Operator Type-M ), is an electronic component, a sound generator chip , developed by Yamaha in the 1980s. It was the first single-chip FM synthesizer of this company. It was used in some inexpensive models of Yamaha digital pianos and synthesizers , such as YPR-7/8/9, DX-21, DX-27, DX-100. It is a close analogue of the YM2164 chip, the next chip in the YM21xx series, with minor differences.
In addition to synthesizers, YM2151 was used in slot machines . In 1984, Atari acquired the rights to use this chip as a component for its gaming machines (however, Yamaha did not grant Atari such rights for home computers ). The first game to use the YM2151 was Marble Madness . Subsequently, the rights to use the microcircuit were also acquired by Sega , Konami , Namco , and some others. The last known game using this chip is Mang-Chi (Afega, 2000). During the period from 1984 to 2000, the YM2151 was used in several hundred different slot machines.
Links
- Yamaha's LSI YM2151 FM Operator Type-M (OPM) - original chip documentation