This week, I managed to pick up an EX800 service manual in mint condition for $7.50. It just arrived and it has so much excellent information. I will scan the pages and make them available as soon as I can. It has the precise definition of the original sysex dump. Including the sequencer data format and patch format. It has perfect schematics for the EX800 (virtually identical to the Poly). Amazing how the small purchases can often be the most enjoyable. Mike.
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EX800 service manual - wow!
2007-11-12 by korgpolyex800