And here it is. The YM2413 in my PSS-170. So what are the other two chips then? I'm guessing a CPU and some kind of ROM for voices...? Time for some googling...

#YM2413 #PSS170

I've just managed to pick up one of these!
This is one of the few models that actually used the YM2413, so it will be interesting to have a play around with it for a bit!

#YM2413 #Yamaha #PSS170 #PortaSound