This guy did it, and he used a generic memory chip, not the ex`s, he even has both systems (poly and ex) on one chip! http://home.wtal.de/elasticimages/musik_basteln_01.htm
Message
Re: poly-800 mdk - sysex for mk1s!
2003-02-24 by jbsepia <echochamberhead@hotmail.com>