Are these genuine YM2612 ?

sigMate · Post by **sigMate** » Sun Mar 25, 2012 3:08 pm

Hi everyone !

I'm currently working on a hardware implementation of the YM2612 chip. My goal would be to make a MIDI synth with multiple YM2612 chips inside. My first circuit is a very basic implementation with a Teensy++ 2.0 board but for the moment, it doesn't work. Since I don't have a real Genesis, I ordered the YM chips on UTSource but, I'm starting having doubts about them.

Here's a pic (click to see in fullsize) :

Could somebody tell me if they seem genuine to you ?

I also have problems with cristal oscillators. The only working one I have is at 3.68 Mhz which I know is almost two times slower than the recommended clock rate. Do you simply think it could damage the YM2612 or simply make it run slower (is the YM2612 a static component ?)

Thanks for your answers !

Cheers !

TmEE co.(TM) · Post by **TmEE co.(TM)** » Sun Mar 25, 2012 6:09 pm

The chips look ok to me and running them slower will not cause any harm, nor will running them faster.
One design I am working on uses more than double recommended speed for one chip, to do very nice high notes on it without as much aliasing artifacts.

notaz · Post by **notaz** » Mon Mar 26, 2012 1:49 pm

So they still make those things?

As for checking if they work, perhaps get a MD1, solder a socket there and test those chips to be sure.

TmEE co.(TM) · Post by **TmEE co.(TM)** » Mon Mar 26, 2012 4:07 pm

Those chips are by Toshiba and from 1988
Yamaha could not make any hcips themselves, they used other companies to get them done i.e Toshiba, NEC, Sharp, Fujitsu.

Post by **KanedaFr** » Mon Apr 02, 2012 8:50 pm

Also you should look at this last year post

I explained how it will be doable... with a teensy

Implement Audio In and it should work.
Let me know how it is going, I'm really interested since it was one of my dropped projects