Turbografx controller port question (pinout)

[YAGRS]

Okay, if this shows up twice, I apologize and will delete one of the threads. I got an error message the first time, but it then said that the topic posted, even though I didn't see it show up on the board. Anyway . . .

I'm in the process of trying to install my Turbo Tap inside my TG-16 case, and the easiest way I can think to do this is to cut the plug from the Turbo Tap and wire it directly to where the controller port connects to the board. I think that would allow me to use the Turbo Tap when I have multiple players, or I could use the single controller port when I'm playing by myself. The problem is that I'm having trouble locating a pinout for this online. I've attached an image of the bottom of the board where the controller port connects along with a pic of the wire assembly that connects to the Turbo Tap. I'm not sure if you can see, but there are 9 wires in the wire assembly (from left to right): black, brown, gray, blue, purple, green, yellow, orange, and red. I assume that the black wire goes to ground (or maybe +5v?—I really am a novice here) and that the rest should go to specific points where the controller port is soldered on (see circled area in the other picture). If anyone has any knowledge of this and can dumb it down for me (i.e., tell me which wire should go to which solder point), I would be greatly appreciative! I'm trying to get this mod and the s-video mod completed on my Turbo today.

[Keith Courage]

The best way to do this is to use a volt meter on the cable to find out which pin is which colored wire. Then you know which wire goes where. You will not need to use the big black ground wire. It isn't really needed. If you really want to though you can wire it straight to a ground point on the motherboard or shielding.

[YAGRS]

Thanks for the reply. Though I have a multimeter, I'd never used it except to adjust the pot on my GameCube. I think I have this wired correctly now, but I can't try it out yet, as I didn't realize until I started the S-video mod that I don't have a 0.001 uf cap on hand.

[bacteria]

Usually, the solder points are easy to line with the wires going in as they are staggered, however the ones in your pic aren't, so you'll need to use your multimeter for the continuity testing, to know what wire goes to which solder point. A continuity tester is a vital piece of modding equipment.

Not all multimeters have the audible beep on the continuity testing, so not a lot of use (you need the beep as you can still get a register that looks ok but isn't), another option is to make your own, I use this a LOT:

http://www.made-by-bacteria.com/forum/viewtopic.php?f=228&t=2853