Need help ( Agetec DC fight stick --> USB pad PCB )

Tech Talk
1

Firstly, please forgive me if this mod has previously been discussed, but I cannot seem to find the specific answers I’m looking for.

Project: Wire an Agetec Dreamcast arcade stick directly to Logitech Dual Action USB gamepad PCB

Problem I encountered is after successfully wiring A,B,X, and Y buttons, the C, Z and Start buttons seem to all trigger the A button when I try to map them to the gamepad.

Desired mapping: C—> R2, Z—> R1, Start—>Start (imagining usual PS2 style layout)

For A,B,X and Y, I used the already daisy-chained grounds on the buttons mapped to a single ground on the gamepad.

But when I add more buttons it would seem that either they share a separate ground, or perhaps
I have something shorted out somewhere. ( I was able to slightly remedy the situation by making a separate shared ground for R1,R2 and Start, but these now trigger both the desired buttons AND the A button. )

I believe I may have read somewhere here that perhaps these ground problems may arise until all of the wiring is completed.

Any advice would be greatly appreciated.

2

Here is my guide on the Agetec

I think the possible issue is that the Logitech pad may not be a common ground controller or less common/worst the pad is hack resistant.

I honestly recommend for PC and PS3 use to get the Toodles Cthulhu PCB. You can order it directly from toodles at http://godlikecontrols.com/
It is a easier and cleaner install that using the Logitech pad, there little to no soldering required and there lots of support documents.