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GunCon2 on PC-monitor

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vibez:
Sounds good. You do know that the jpac does some converting of Sync or voltage. I'm not sure what exactly. So you circuit might need fine tuning....

ZeroPoint:
The J-Pac can convert the voltage on the RGB-signals to 5 volt. Some arcademonitors need 2-5 volt and have a input impedance from 1K to 10K. This has nothing to do with this circuit since we only use the sync-signals.

If you use the J-Pac you probably also use the ArcadeVGA card. This card outputs 15Khz Horizontal sync so you can use this directly without my circuit.

If you use composite sync (the J-Pac should be able to make this):
If the voltage level on the composite sync from the J-Pac signal is below 1 volt (I use 0,3V) you can connect the guns video connector directly to this.

If you do not:
Borrow the H and V signals from the video card and combine these in one way or the other. If you don

vibez:
Yes I do use an arcadevga + jpac.

I was connecting the center wire of the guns RCA cable (signal) to the Videosync on my jamma board, then connecting the outer wire (ground) to the Vground on the Jamma. This worked at all but a few resolutions. For some reason @640x480, windows wouldnt even detect that the gun was plugged in.

Any idea why?

Smog:
Hi man,
About the white flash, I suppose we could find an HW solution for that. it should take no more than a few resistors to drive flashing from parallel or serial (second one would be preferred since parallel port is used often for other important connection into a MAME-PC) port on a pass-through VGA signal.

crashwg:
I may be wrong but doesn't mame already flash the screen?

I know it at least does it for Zero Point and Zero Point 2

FCEultra also does this with at least Duck Hunt...

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