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

[Colin f]

> Now if someone has a clue about how to rip code off a 6500/11... (My 
> guess is that test mode signalling is done on PA, possibly PA0. It 
> magically appears as "input data strobe" on one illustration, 
> but isn't 
> specifically shown in the block view, which in term shows an edge 
> detector sitting next to PA.)

Maybe the INT pin - there's a flow of arrows from there to the program
counter.
Maybe you hold test low, reset the device, then manually clock the PC at the
INT pin, and read each byte out C & D.
But that would be too easy...
I've got to say, I'm tempted to try this out.
And I've got a couple of NOS 303 CPUs in my parts box...

Cheers,
Colin f