🚀 go-pugleaf

The last time I sent this out, it got stuck in our local CA. loop.

Okay, I'll try again.  I have a Sequential Circuits model 270 , 2 1/2 
octive keyboard for hooking up to the joystick port of my commodore 64.
The kids have torn the wiring out of the side, the wiring consisting of
five lines.  This wiring was torn out of the board such that no color
exists on the solder glob to make identification for me easy.
 Sequential has been bought out by Wine Country Productions,
whom I've written months ago for assistance on how to rehook the wiring
back up.  All I've received from them to date are two ads for new midi
interfaces, so I know they at least got my letter. (and then ignored it
after I was put on their mailing list.)
This last weekend I took the keyboard apart, and inside was a 40-pin
IC, a resistor, and a capacitor(?).  FOr the folks in the electronics
group, the chip had the following marking on it.
I-600
5A-2084
8438

The IC had 32 lines connected to the keyboard keys.  Of the five lines,
one was connected to pins 1 and 2, one to pin 20, one to pin 3, one to
pin 39, and one to pin 38 through a 915 ohm resistor.  There is something
connected across pins 1 and 20 that could be a small cap, but the only
markings on it are 104m.

I assume pins 1 and 20 are ground and +5 volt, but I'd hate to guess 
wrong and burn out the chip.  The other three lines are joystick data
lines, and I could vary the connections with them until they work 
provided I have the power hooked up right.

For the c64 folks, the three data lines are A0, A2, and A3.

If anyone knows the proper power connections for this IC, please let me
know.  If anyone knows how to hook the final three lines up correctly,
please save me the experimentation time.
Thank you.
-- 
Joe St.Lucas    stlucas@gdwest.gd.com        Standard Disclaimers Apply
General Dynamics Space Systems, San Diego
My blood runs Husker red.