Discussion about the Korg PolySix synthesizer

I plan to use a PIC18F6520 in the T64 (0.5mm TQFP) package.  It has all 
sorts of internal features: dual UARTs, 4 timer/counters, I2C, SPI, 
multiple A/D..you name it.  It has 32K program flashrom, 1K user data 
flash, and 2K of SRAM.  Plus, I'm used to the part so using it in a patch 
manager board like this will be relatively simple.  If I somehow manage to 
run out of program space, I can go to the 6620 (2x all memories) or the 
6720 (4x all memories).

  It would be a surface-mount revision of the board, with a lot of the old 
hardware going away in favor of PIC-based circuits and code replacements.  
The only things that really need to stay are the analog circuits.

  As far as the code for the KLM-367's 8048, I extracted the code about
ten years ago and have it online as a 1K binary file.  Ricard Wolf did a
complete disassembly on paper for it around the same time; I have a paper
copy of his notes but they're not really mine to hand out--please ask him
for a copy.  (He also disassembled the KLM_366's key assigner 8049).

  FWIW: the key assigner 8049 is also used in the Mono/Poly.  In fact, the 
voice stack/share mode of the Mono/Poly will work in 4 voices on the 
Polysix, provided you hardwire a button in to shunt the proper switch 
scanning pins.

  Also, the 8048 used in the KLM-367 is also used on the KLM-380 for the 
Trident MkII--it is the exact same program.

Crow
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On Wed, 27 Aug 2003, Stefan Rinass wrote:

> Hi,
> 
> For additional functions would be much easier IMO to build a new Board 
> from scratch with a new MCU and a own program (presupposed someone knows 
> exactly which pin on which connector has which function)....
> 
> Otherwise, has anyone ever read out the 8048 and had a look into the 
> code? I can program in Assembler; proably i can analyze the Code of the 
> 8048 and make it compatible to the 8535 with a few re-programming....i 
> have two 8048\ufffds from two 367\ufffds here, but i can\ufffdt read them out, cause i 
> have no Device to do so.....