I recently got an IO board thanks to aberu from here on the forums, but I can't find any documentation about configuring the USER button on the IO board. The only info I can find is that it's user configurable.
For me, I'd love for it to swap between mister.ini alt files. I'm imagining that I'll have one for HDMI output, one for VGA output, and one for YPBPr output.
I'm happy to add the info to the Wiki once I understand how to do it. Thanks!