Korg Poly800/EX800 Users

Excellent! The programming team is now 100% bigger than it was an hour
ago.

The processor is an 80C85 which was the predecessor of the Zilog Z80.

I am not aware of an 80C85 snap in for gcc. But I would very surprised
if we were not able to find one.

I'll probably spend the next couple of weeks deciding which way to go
with all of this. I guess I'm doing a little mid disassembly reassessment.

But it really would be nice to write the whole thing ourselves.

Mike.


--- In korgpolyex@yahoogroups.com, Tim Bieniosek <tab27@...> wrote:
>
> Getting a stock Poly to run our own code would be a neat trick!
> What is the CPU again, is it something gcc will compile for?
> 
> If you can code up a platform layer in asm, with hooks into the hardware
> functions we need, I'd volunteer some code in C.
> 
> Tim
> 
> 
> On Fri, 6 Oct 2006, patrioticduo wrote:
> 
> > Hi Poly Fans,
> >
> > Well not much of an update but how about a little confidence booster.
> >
> > Summer is OVER! And that can mean only one thing. Lot's of time will
> > be available for me (and hopefully you) to continue disassembly of the
> > Poly.
> >
> > However, I'm beginning to think that it might be just as much fun or
> > even more fun to just rewrite the code from the ground up! In fact, I
> > was thinking along the lines of making the project an open source
> > project. You see, my kids are homeschooled so I am always being asked
> > what I am up to in my little lab. And I was thinking that it would be
> > extremely educational for my kids to actually learn what it's like to
> > program a microcontroller in a synthesizer situation.
> >
> > Although I think there is still a lot to be gained from me continuing
> > to disassemble the Poly code, I am contemplating creating a little
> > boot loader that will allow me to send an entire RAM image down MIDI
> > (not even sysex but a specially crafted upload) to the Poly. Then,
> > once the code is downloaded the Poly would boot the code. This would
> > give us the advantage of being able to write whatever we like on an
> > assembler, heck we could write it all in C if we like. And once we are
> > happy that the code is solid and bug free (running in RAM) then we can
> > commit the code to EPROM.
> >
> > So far, I've probably spent about 10 to 15 hours on disassembly. It
> > doesn't sound like much but what I've learned in that time is that
> > disassembly without a memory map is really, really difficult. And the
> > other big thing I've learned from it is that it might be easier to
> > just rewrite the whole thing. I mean, who the heck cares about the
> > sequencer anyway. So why bother trying to disassemble that? Except
> > that, to disassemble the rest means disassembling it all. Kind of
painful.
> >
> > The only question is, how many software engineer people do we have on
> > this list who would be willing to contribute valuable and precious
> > time to coding in assembler or C?
> >
> > If we went the open source route then I would just sell the hardware
> > retrofit kit and make the code free.
> >
> > Mike.
> >
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
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> >
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