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Offline ognix

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Re: New gamepad $4.55
« on: March 16, 2011, 10:19:46 AM »
Quote from: lauri.lotvonen;622197
Is there a guide yet to modify the Genesis controller so the one of the buttons works as UP for jumping/accelerating? I tried searching the A.org forums, but no luck.


Hi!
It's not difficult if you (or a friend of yours) have some electronics skills: it's just a matter of connecting in parallel with one wire the up pad contact with the button you prefer (disconneting the original wire connected to the button).

To "do the action" the joystick/gamepad just connects the up/down/fire/etc signal to ground (GND - usually black wire).

Ask a friend of yours in case... it's a matter of minutes once you have opened it.

BY!
 

Offline ognix

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Re: New gamepad $4.55
« Reply #1 on: March 17, 2011, 12:03:57 AM »
Quote from: lauri.lotvonen;622223
I think I have the soldering skills for that, thanks for the info :).
First I will try it on one of my old joysticks,let's see how it works out.
If someone has done this to an sega controller please up some photos.


Thanks, but for being more precise, it's unlikely that you'll find just wires inside the pad.
Much probably there is a PCB (Printed Circuit Board) under the hood.
In this case focus on the contacts/buttons behind the "up control" and the "button" you want to use for going up as well.
Secondly find the ground trace, common to all directions/commands (starting from cable wires, try the black one first): a multimeter is useful.
Thirdly you have to cut "button" copper trace with a cutter (not the ground but the other one), use the cutter to remove the (probable) green protection film on the PCB, and solder one end of a short wire near the "button", and the other near the up control (trace always treated with cutter for putting some tin on it).

Hope I didn't mess you mind with these things, but just to be more precise (despite I don't know exactly what you'll find inside the game pad).

Let us know!
BY!

P.S. These are just hints: I'm not responsible if you make a mess!  :)
 

Offline ognix

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Re: New gamepad $4.55
« Reply #2 on: March 17, 2011, 09:33:01 PM »
Quote from: lauri.lotvonen;622475
Ok, so I got a hold of a original sega mega drive II gamepad, and modded it so the A button works as UP.

It was a fairly simple task, and took about 20 minutes to complete.

I just searched ground signal from the A button and UP button, soldered the other signal from A to UP and cut the original PCB trace from the A button.

Some pics:




The soldering isn't beautiful, but the gamepad works perfectly:).
BTW, works on C=64 too. Just noticed the pics have alot of dog hair in them, have to check that the controller isnt full of them too =P...


Exactly what I meant!  :)
As you experienced cutting is just a matter of patience with cutter and "scratching" copper away (paying attention to nearby contacts/traces).
The gamepad will work as you expected on every system it worked before: nothing special.

With more handcraft you can add a switch to choose between the "normal behaviour" or the "up button" one.
But if you don't plan to use it back to Sega, it's ok anyway.

BY!