Yamaha YM2610

OPNB, is a sound chip developed by Yamaha.

It is a member of Yamaha's OPN family of FM synthesis chips, and related to the YM2608.

The YM2610 was most notably used in SNK's Neo Geo arcade and home video game systems from 1990 along with other arcade game systems, which included Taito's arcade system boards from 1987[1] such as the Taito Z System,[2] which used a variant of the YM2610 (see below).

The YM2610 has the following features: A variant of the YM2610 known as the YM2610B was identical to the YM2610 in every other feature, except that it added two extra FM channels for a total of six.

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