Small project: mame-ing my Capcom Impress

[Ummon]

Well, I've been doing some small wiring on my Impress. First up was the controls. I didn't want to re-wire everything so am using the existing wiring hooked up to a GPwiz. I'm having some issue here, as Windows sees the unit but keypresses aren't registered.

[Ummon]

Just for fun, here's a picture of the monitor chassis. I was waiting on getting some torx bits to get into these parts, and I'm glad I did. Whereas initially I didn't think it was necessary, I found the chassis wasn't secured. It was screwed in - the screw lower-right - but there's a flange on the left the chassis fits under, and it was on top of it. The pcb had lifted or bent a little by the screw.

[Ummon]

Next I'm wiring the monitor to the VGA port of the PC. I have this neat little deal that has a six-pin header on one end and a VGA port on the other.

[Ummon]

And here are the rest.

[Ummon]

Now, I'm having some trouble with the video. The color is great. But the image is garbled. JAMMA is composite sync....from the board, right? But from the PC it's not. I think this is where my problem is, yes?


*the first image is with the sync wire attached to the V pin; the second image is with the sync wire attached to the H/C pin. Also, I forgot to mention that I'm using Advancemame here on auto.

[Ummon]

Here is a picture using Mame32 and soft15 - Gyruss @ 352x256 - and with the sync wire on V.

[Paladin]

I'm guessing your keypresses aren't working because you don't have a ground wire going to the encoder.  At least that's what it looks like in the picture.

[Ummon]

Funny you say that, heh. I thought this was the case and am waiting an answer in 'Main' because I don't know what ground(s) to use.