Is there a way to have mame create a simple, 1 pixel border around a game? On my setup, I have the screen mounted behind smoked plexi so the game image just shows up "floating" in the middle of the front of the cab -- unfortunately, when playing games like joust, I cannot tell where the edge of the playing field is, so would like to surround the game screen with something like a 1 pixel gray line.
Thanks!