[sdiy] pd650 - do all the Roland applicaitons use an identical chip?

[Colin f]

> Hmmm... I wonder what's happening on ports C/D, if you power 
> the chip on 
> with TEST tied low instead of high, apply reset, and start clocking.

I've wondered about that too...
Did typical microcontroller devices have code security in those days ?
Seems like Roland would be cautious about having their code copied.

Cheers,
Colin f