Archive of the former Yahoo!Groups mailing list: Korg Poly800/EX800 Users

Thanks for the support.

In order to keep all of the old EX800 functions it is also necessary to work out how all of the original assembly code works. And as I identify more and more of the uses of the static RAM, I am getting faster and faster at working out the functions and program logic of the original ROM. So that now, I've completely decoded all of the MIDI implementation, decoded about half of the front panel, rear switches and keypad logic, about half of the sequencer logic and all of the initializations (power up).

The only remaining difficult piece of disassembly (which is why I've left it until last) is the real time note event handling, envelope generator, modulation and filter control and multiplexing. When I get that done, we will be in a position to start integrating new real time sound synthesis features into the instrument.

At this rate, I suspect I will be able to release the hardware upgrade and version 0.5 of the software to us all within six months. Version 0.5 will not have much in the way of extra features but will include new sysex features. But those alone would make the EX800 are much more useful synthesizer. The really good thing about this hardware upgrade is that it will use two EEPROM's which means that you will be able to download new software as it becomes available and flash copy it into your EX800 (or Poly800) from my website.

Anyway, back to it.

Mike H.


jusufzemplin <jusuf@...> wrote:

I am very sad, that I am not so skilled, that I could help with
developing.. .
THANK YOU for this work.
Jozef
>
>
> korgpolyex800 wrote:
> > Tuesday 6th February 2007 - Program Storage
> >
> > Finally, I've nailed down the precise location of program
storage in
> > the EX800 RAM.
>
>
>
>
>
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