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I recently bought an untested Operation Wolf board on here for one of my upcoming projects, upon receiving it and buying an Taito Classic jamma adapter I finally got around to testing it and found that it had no CPU activity whatsoever, fortunately it was just the result of a small break in the trace coming from the PAL chip near the CPU...1000025185.jpg
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After patching it with some enameled wire it was back to life...
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Now I wanted to test and see if either of the 2 light sensor boards I had would work but I've could get neither to register any hits on screen. Though it probably is mostly due to testing them out of the gun which I dont have access to test at the moment so I will have to try them again later. BUT. in the meantime I wanted to make sure everything was alright with the boardset so I decided to do some researching online to figure out how to adapt a NES Zapper to work as I had one I had robbed the cord from years ago just laying around, but I was only able to find similar posts about using sega light guns and happ light guns. After some trial and error I was able to achieve some moderate success.
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My gun and monitor setup was not 100% accurate as most shots seem to land to the left of were you are aiming at but it worked for testing purposes.


I figured since I couldn't find any guides online for using a zapper with an OP Wolf I'd at least archive what I did here in case someone else need to do this for some odd reason.

First of all is some NES Zapper conversion post online (like for use on a VS Unisystem for example) tell you to remove this transistor in the zapper and bridge 2 of the pads to make them compatible...
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YOU DO NOT NEED TO DO SO IN THIS CASE.
I tried it both ways and could not get it to register without it.

So with that in mind here are the steps I took.

The white wire in the Zapper is +5v I just soldered a red wire (red to make it more obvious) to the back of one of the +5v pins on connection H.
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The blue wire is for the sensor, so I ran a wire to the leg of inductor L13 on the sound board (which is the first component on pin 5 on connector T)

The brown wire is ground, I soldered it to a small pad on the ground plane near pin 1 on connector T (though you can put it somewhere more convenient for you situation if you need to, I only put it here to get it in the same picture with the sensor wire)
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The purple wire is for the trigger and it goes to pin 21 on connector T. If you are using a jamma adapter it will be pin 22 (button 1 for player one)

I didn't bother testing the rockets but if you need to do so just wire up a button using pin 4 on connector M and a ground.



I don't know if this post is useful or not, but I wanted to at least have what I did written down somewhere permanent for future reference.
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