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| J-PAC shift function working oddly |
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| pinballjim:
--- Quote from: AndyWarne on October 08, 2012, 08:05:03 am ---For example if you replicate the I-PAC shift combination Start1 + P1SW1 = coin, as soon as you press the Start1 button the game will try to start because the "primary" key is sent, then the shifted "coin" key will be sent. --- End quote --- I've only found this to be an issue with the USB joystick encoders. The obvious solution to your scenario is to press and hold Player 1 Button 1 before you hit start, though. I physically alter my JAMMA harnesses when I'm using a JPAC and rewire player 1 start to one of the screw terminal inputs on the board. That shift functionality has been nothing but trouble in my experience. --- Quote from: Hammerfist on October 08, 2012, 08:52:20 am --- I'm thinking that it happens when I have to turn my monitor off and on while my PC is running. --- End quote --- Nope, you've just got a dud JPAC. It happens. |
| AndyWarne:
--- Quote from: Hammerfist on October 08, 2012, 08:52:20 am ---Ok, I hadn't thought about that and see no need atm, but that's good to know. It seems that my computer is putting the J-Pac out of whack sometimes, now that I've been building my cab. I'm thinking that it happens when I have to turn my monitor off and on while my PC is running. Not something I need to do when the cab is finished. Trying to avoid it, but there's been a few "must" situations.. Some kind of "back fire" maybe. Thanks Andy! --- End quote --- One possibility is monitor grounding. Is the monitor chassis permanently connected to the power cord ground? It should be, even if its turned off. If the only ground path is the ground wire on the video connection this might not be sufficient. When the monitor is turned on, the degaussing and the power supply startup cause a large current to be induced into the ground which must have a good path to directly discharge through. |
| Hammerfist:
--- Quote from: AndyWarne on October 08, 2012, 09:47:00 am ---One possibility is monitor grounding. Is the monitor chassis permanently connected to the power cord ground? It should be, even if its turned off. If the only ground path is the ground wire on the video connection this might not be sufficient. When the monitor is turned on, the degaussing and the power supply startup cause a large current to be induced into the ground which must have a good path to directly discharge through. --- End quote --- Hmm, the cabs wiring (not counting what I've added) is basically as it was when it left the Atari factory, so I hadn't thought about that earlier. Power cable for the monitor has neutral and live, but I didn't find a ground wire when I had a quick look yesterday. Of course the cab has ground wire and it's attached for example to the switch, that powers the monitor. |
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