Korg Poly800/EX800 Users

I am getting "We are sorry, you can not display images hosted by Yahoo! Groups on non Yahoo! Groups pages." when I try your link.

Is the diagram in korgpolyex somewhere?

Mike



________________________________
 From: bimmerfan222 <bperkins211@...>
To: korgpolyex@yahoogroups.com 
Sent: Saturday, April 21, 2012 12:02 PM
Subject: [korgpolyex] Encoder/Decoder Circuit with counter & buffer
 

  
Hey Mike,

I've uploaded a pic of an encoder circuit using the chips you suggested. 

http://xa.yimg.com/kq/groups/3694848/or/465001900/name/encoder+counter+%26+buffer+circuit+v2.jpg

I chose to use a dual FF IC  (74HC74D) to decode the encoder.. I also tried to include a debouncing circuit before the signals go into the FF.

Please take a look and see if this is on the right path.  I left the 4024's reset line and the 74HC244's enable lines open for you to possibly show me how you use them with the Hawk Boards I/O lines.
I assume the outs on the 244 go directly to the main CPU bus.

Of course I only showed half of the full circuit for one encoder.. X out circuit is the same as Y outputs circuit.

I assume the counter changes it's output lines as a binary number.. so in essence, with 7 bits it can produce a number between 0 to 127?

Is it possible to test this thing with LED's at the outputs of either the counter or the buffer using a simple breadboard and 7 LED's?

Any further suggestions?  Am I on the right path with this design?

Thanks in advance for all your help.

-Blaine