Changes

Sound capabilities are also quite different. The Play2CPC is equipped with an OPN3 (ymf288) soundchip. It offers 3 PSG SSG chans, 6 FM 4-op chans and 6 digidrum chans.The PlayCity is equipped with 2 PSG SSG soundchips offering a total of 6 PSG SSG chans, but no FM and no digidrum chans.

* Port &F988 to : read status 0 or select a page 0 register* Port &F888 : read/write to the selected page 0 register* Port &F984 to : read status 1 or select a page 1 register* Port &F884 : read/write to the selected page 1 register

You can also use The SSG, the CRTC cursor registers to program digidrums and the raster interruption located at &0066first 3 FM chans are accessed on register page 0. The last 3 FM chans are accessed on register page 1.

The OPN3 soundchip is mostly a light version of You can also use the OPNA soundchip with some functionalities removed: no external ADPCM, no Composite Sine Mode and no GPIOCRTC cursor registers to program the raster interruption located at &0066.

FM channel 3 The OPN3 soundchip is special as it can be split into 2x 2-op chans or 4x 1-op chansa light version of the OPNA soundchip with some functionalities removed: no external ADPCM, no Composite Sine Mode and no GPIO.