Required arcade monitor for Act Gun?

[csete]

Is the Wells-Gardner D9200 the only arcade monitor that  an Act Labs Light Gun (or similar) be interfaced with?  What is the distinguising factor?  Does it just need a standard PC VGA connector or is there something more to it?

[jerryjanis]

No, the Act Labs PC Light Gun works wonderfully with my Arcade VGA and Wells Gardner 25k7191 (15khz standard res arcade monitor).  It didn't work until I fixed my hsync and vsync.

Andy Warne at Ultimarc has been running some tests with the Act Labs gun and arcade monitors. He discovered that if you use an arcade monitor and you splice the hsync and vsync wires together in your VGA cable hack, then the light gun won't work. I added a wire to my monitor's output cable for the vsync, and wired it correctly to the video card, and now I'm playing gun games on my cabinet. Sweet! By the way, according to Andy, this fact is true no matter what kind of video card you are using.

[csete]

I'm running a JPAC to my monitor.  Can I assume that it is correctly wired to work for this?

Thanks

[Sephroth57]

yeah id like to know if J-pac would work with light guns also. i will have the J-pac / arcadeVGA combo with a arcade monitor

[jerryjanis]

I'm running a JPAC to my monitor.  Can I assume that it is correctly wired to work for this?

I don't know, but email Andy at Ultimarc.  He would know for sure.

[gizmonic]

yeah id like to know if J-pac would work with light guns also. i will have the J-pac / arcadeVGA combo with a arcade monitor

I'm using a K7400 Wells Gardner with a J-Pac and my ACT Labs lightgun works great.

[Sephroth57]

dumb question, how does it know where youre aiming?  i remember old school duckhunt you used to have to put a sensor thing on top of the TV. in modern guns what is the method of detection? in the  arcade you never see a sensor, but is it hidden?

[jerryjanis]

dumb question, how does it know where youre aiming?  i remember old school duckhunt you used to have to put a sensor thing on top of the TV. in modern guns what is the method of detection? in the  arcade you never see a sensor, but is it hidden?

I'm sure there's a better and more correct explaination of it somewhere, but here's by take on it...  When you pull the trigger, the screen flashes white. The way monitors work, a flashing of white is produced one pixel at a time very quickly, from left-to-right, top-to-bottom.  The lightgun points at a specific location on the screen, and there will be a  delay between when the white flash starts, and when the white flash reaches the part of the monitor that the lightgun is pointing to.  The lightgun counts the delay, and will use that time to determine where on the screen the gun was pointing.

[MrPoPo]

A TV light gun or a PC-USB light gun ??