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I thought i figured out the layout but now im not 100%. I have the directions working but the fire buttons dont. I know i have to cut the one trace goes between the two buttons but and im looking at the pin out and doesnt look i need to have the orange wire hooked up but if i do someone correct me. As of right now i have both Red and Yellow with the two resistors from the 7800 then linked into the diode then diode to ground. If you need pics i can take pics of the circuit but can someone please advice on what i need to do to get the two buttons working on the 7800.

 

Sources i was using: post-38599-0-92025300-1476829440.jpgpost-46659-0-03781100-1503633296_thumb.jpg

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Awesome thanks where do i connect 6 to then on this circuit? originally orange was on where i now have yellow so if i change those out idk where to go with the yellow then.

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It's a little confusing using the color codes, because they are not all the same between the examples that you have shown. Pin 6(orange if your joystick uses Atari's standard) needs to be connected to the 'other' side of both fire button switches(the sides without the resistors.)

If I'm interpreting you correctly, you also need to disconnect that side of each switch from ground if you haven't already done so.

Edited by fluxit

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It's a little confusing using the color codes, because they are not all the same between the examples that you have shown. Pin 6(orange if your joystick uses Atari's standard) needs to be connected to the 'other' side of both fire button switches(the sides without the resistors.)

If I'm interpreting you correctly, you also need to disconnect that side of each switch from ground if you haven't already done so.

OHH SHIT why didnt i think of that the buttons had two connections on each one on so i need to add a wire to extend it but i think i can get this to work. So Disconnect the resisters from ground. Remove the diode and put orange to both buttons. The side without resistors is the ground side right? Cuz looking at my buttons theres two traces ground and the main. The main i have resistors on.

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Ok so i removed the diode, Removed the ground for the two resistor connections. I thought soldering the Orange directly to the button pad would make it work but its still isnt so im guessing i need to switch the orange wires to the ground side of the buttons idk that doesnt seem right either and there isnt a third post to go with.

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post-47453-0-81110100-1504255145_thumb.png

The above is what you have now as far as I can tell, if the last picture that you posted is the latest. I'm making an assumption, as I'm not absolutely certain what is going on under that electrical tape.

 

post-47453-0-67180100-1504255174.jpg

If this is how things currently stand, you need to:

 

1. Cut the ground trace at the two points marked in pink.

2. Remove the black jumper wire from point A, and the green jumper wire from point B.

3. Connect the orange wire to point C.

4. Reconnect(without the diode this time) the end of both resistors with a jumper wire from point D to point E.

5. Run a jumper wire from point E to point F in order to restore ground to the directional switches.

 

 

After you've tested successfully, you might want to wrap the end of those resistors in tape or heat shrink for reliability.

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post-47453-0-52624700-1504305651.jpg

Also, if you have a multimeter and haven't done so already, you should test for a bridge at the point indicated. from the red wire(or pin 5) to the yellow wire(pin 9) you should see approximately 1240 ohms. If you don't, your fire buttons are not going to work.

Edited by fluxit

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its really simple once you get it working, but that first time, thanks to the available documentation its a bit of a what?

 

but yes what fluxit posted is correct, you use the orange pin 6 wire as the +, 5 and 9 which are the analog input for paddles and whatnot on a 2600 are pulled low with the resistors and when you close one of the two switches, voltage goes from 6 to one of the analog inputs registering a voltage change from zero and badda boom 2 button control on the 7800

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