[Coco] Orchestra 90/cc to Stereo Composer Conversion http://6809assemblylanguage.fortunecity.com/ORCH90CC-2-STEREOCOMPOSER.html

[coco at yourdvd.net]

Joel (and the rest of the gang):

Since I didn't have my schematic handy for the modification that I made,
I have recreated it and provided three different schematics that should
perform the same function. I think I prefer MOD 3. In order to use the
Schematic Files, you'll need to download: http://www.pcb123.com/ which
is a free schematic and board layout software. I have switched from
using Eagle and other Layout editors because they are expensive and I
wanted to use something that everyone on the list could afford. You
can't beat free and it does a wonderful job. Also, for FPGA/CPLD etc.
work, I have switched to using:
http://www.xilinx.com/ise/logic_design_prod/webpack.htm which is also
free and AMAZING! The page states: ISE WebPACK
ISE WebPACK is the industry´s only FREE, fully featured front-to-back
FPGA design solution for both Windows and Linux.


Also, I have included the schematics as PDF files. Please note that you
should verify the logic, as I just threw these together (I am very
tired and I also had to leave work because of the excruciating pain
that I am in due to gall bladder problems - the thing has to be removed
tomorrow, so pain may have caused me to err.)

Let me know if you find the circuitry to be in error, and I will fix it.

I have also created a modification that allows the Orchestra-90/cc to
become a stereo composer and remain an Orchestra-90/cc. It will be
posted soon. I simply modified the address decoder to respond to both
sets of addresses. Whilst I am out of work, I will be looking for my
schematics and posting them.

I will soon post my schematic for the 8-slot Multi-Pak Interface that I
originally designed in '94, but I am going to modify it so that the
upper bits function as Paul Barton mentions on his page.

Regards - Robert
DOWNLOAD HERE:
http://6809assemblylanguage.fortunecity.com/ORCH90CC-2-STEREOCOMPOSER.html





http://6809assemblylanguage.fortunecity.com/ORCH90CC-2-STEREOCOMPOSER.html