Casio CZ/ VZ/ FZ - Pro Series

--- In CZsynth@y..., "Atom 'Smasher'" <atom@s...> wrote:
> has anyone ever "bent" a CZ-synth?
Atom,

I thought about this for a bit.  Then I decided that the service 
manual will really help in this effort.  

The CZ's synth board seems mostly digital, so the effect of adding a 
resistor inline with a connection between a RAS signal and a ROM chip 
doesn't seem very useful. :)

The keypads (both for the piano keys and for the control buttons) are 
all digital... the best you could hope for is a set of two or more 
keys being pressed at once.  There are diodes all over those boards 
that currently prevent this, but "bending" might skip over the diodes.

There's a latch board to keep the LEDs turned "on" once a 
corresponding control button's been pressed.  Maybe you could get two 
LEDs to come on that shouldn't both be on.

The amp board and the analog output sections of the synth board could 
be fun.  I'm thinkin' there's a D2A piece that could be interesting, 
and everything "after" that would be fun too. Hhehehe you might even 
mess with the auto power off logic so it turns off very quickly? I 
dunno.

I'd be more interested in understanding the differences between the 
CZ-1000/101 and the 3K/5K/1 boards.  Maybe we could get more 
polyphony out of our little friends?  I can't find anything about 
the "microprocessor" chips on the synth board.  I searched the web 
extensively.  I didn't think I would find anything, either. Who 
knows, so I tried.

Tony