Korg Poly800/EX800 Users

Mike,

  This is really good work. Since I had my Poly-800 II apart today to 
do the Moog Slayer mods I copied the firmware and uploaded the 16k 
file to the group. The part number for the version (on the top of the 
chip) was 851005. If you haven't seen this file yet maybe it can add 
some insight. I'm not a programmer so it's all foreign to me. 

  I'm listening to these mods in a good pair of Sennheiser headphones 
since everyone is in bed but me. Good thing I'm the only one that can 
hear this or I'd by shaking the house. Awesome doesn't quite describe 
what this beast can do now! Thanks to Atom and everyone for sharing 
this idea. I used a 100k audio taper for the cutoff and a 50k audio 
taper for the resonance. I have a dpdt switch so I can defeat it and 
use 21.7k for VR2 and 2.37k for VR5 (the values of the factory pots). 
I also installed the FM mod pot and the 12/24 db filter mod switch 
but didn't have enough time today to get them installed. There's 
always tomorrow.....

Fran 

--- In korgpolyex@yahoogroups.com, "korgpolyex800" 
<korgpolyex800@...> wrote:
>
> Another little update for you all,
> 
> I just completed writing and successfully tested the sysex function
> that allows me to send new firmware to the two new 8K EEPROM's. This
> means that I am now going to be able to split the original 8K ROM
> functions out into the new 16K of ROM space and then just send the 
new
> firmware to the EEPROM's as a somewhat long (16K) sysex message.
> 
> Up until now, I've had to strip out from the original ROM both the
> tape functions and the old sysex bulk dump and send functions. So 
now,
> I'll be able to put all of the original sysex code and tape 
functions
> back into the ROM code while continuing to develop new functions. In
> particular, now that I've got a whole extra 16K (that's double the
> original ROM plus the original giving 24K of ROM), I'll be able to
> immediately start work on the new controllers that we all want to 
get
> working. I'll also be able to start looking at the Poly800 ROM to 
plug
> the keyboard and joystick controllers back into the EX800 ROM code.
> 
> The only thing I haven't done yet is to write a small executable to
> split an 8K ROM binary image into a 16K nibble based file that will
> make up the sysex firmware update. I have to do this because the 
sysex
> message uses two bytes (high and low nibbles) to form each ROM byte.
> 
> Y'all have a great weekend.
> 
> Mike.
>