OK I am beating my head against the desk here. I have a J-PAC JAMMA converter that is basically a keyboard. It converts the arcade controls to keyboard key strokes. Works great on MAME4ALL. Not so great in FCEUX.

I know I need to remap the keys in the fceux.cfg file. I've done that. But when i copy the file back to the /.fceux directory and try to start FCEUX it gives me a "segmentation fault" and goes back to the ROM select screen. I've made sure the file permissions are set to 775 like I found in another thread. FCEUX sees my contols as a keyboard so that is the section of the cfg file I have edited. The direction arrows are correct by default, I just need to remap start, select, A, B and once I'm done with that I'll start to think about player two's controls.

As near as I can tell the CFG file reads the keystrokes as ASCII numbers.

Any ideas out there?

And If I get this sorted out I'll write up a How-To for it, because this is frustrating!