Location of rebindable Insert Coin key in Mame menus?

[/classicNES]

I put the km_MAME 2014 core on my NES, running in km_RetroArch 177 Xtreme, and I was able to boot a game just fine, but none of the buttons on my NES or SNES mini controllers actually insert a coin to begin the game.
I heard this defaulted to Select, but that doesn't do it, even when I do the command to rebind all controls to default. I also don't see any relevant choices in the rest of the rebind Input menus. And finally, Retroarch crashes when I attempt to use the Search feature in its menus.
So... can anyone point me to the exact in-menu location of the command to insert a coin? Thanks a lot!

submitted by /u/bunkdiggidy
[link] [comments]

More...