You can see that the channels are labeled YM2608, which is one of the many four-operator FM chips from Yamaha used in consoles and PCs (like the Genesis and AdL

You can see that the channels are labeled YM2608, which is one of the many four-operator FM chips from Yamaha used in consoles and PCs (like the Genesis and AdLib). https://en.wikipedia.org/wiki/Yamaha_YM2608 https://en.wikipedia.org/wiki/Yamaha_YM2608 Like the IBM-compatible PCs, the PC-98 series was available with various different sound options.