Discussion about the Korg PolySix synthesizer

I always wanted to try that, but using a very small switch that will fit somewhere up near the other patch buttons. Maybe I’ll find a little switch and include it in my next Mouser order.
Don B.

From: mailto:PolySix@yahoogroups.com 
Sent: Wednesday, July 15, 2015 3:44 PM
To: PolySix@yahoogroups.com 
Subject: Re: [PolySix] Polysix Memory Expansion

  
You can easily double the patch memory by soldering a 2nd RAM chip onto
the old one. You have to make the nCS signal switchable, e.g. via a
front panel switch ner the Pbend / Mod wheels. Wire the switch this way:

|----------o RAM chip 1 pin 8
IC25/pin11 o------/
|----------o RAM chip 2 pin 8

Either one RAM chip is active or the other. The inactive chip has to
have a pullup resistor on its select pin, so add a 10k Ohms resistor
from pin8 to pin 18 to each RAM chip.

Have fun!

Johannes

On 2015-07-15, 05:26 grantbt@jps.net [PolySix] wrote:
>
>
> I wonder with all these KLM367 replacement boards and various MIDI
> options, do any of these offer expanded patch memory?
>
>
> I ask because back in the late 80's (I guess) I sold a kit through EM
> Magazine that increased the patch memory from 32 to 96. The downside is
> there was definitely soldering involved. The upside is the bank
> selection was done using existing panel switches (decoding an unused
> combination of buttons). Is this pointless now that these new boards
> offer more memory than a stock P6? Anyway, I just stumbled on my old
> design and that triggered this question. I don't have a P6 at this time...
>
>
> GB
>
>
>
>
>