Single button exit / single button pause

Hello all. I’m using a single player arcade setup with a xin-mo.

I’m trying to set up an exit button that will exit the emulators when pressed. I am trying to avoid having to press two buttons to exit (i.e., hotkey). This works with MAME4ALL because it has the option in its TAB config menu. However, I can’t figure this out for my other emulators, including NES, SNES, and Genesis.

I’m also trying to set up a pause button that will pause the emulators when pressed. Again, I am trying to avoid using a hotkey and I have this working in MAME4ALL, but not my other emulators.

Thanks in advance!
Scott