Apparently TrackBall controls are possible in some versions of this game. Getting this to work is a PITA.
rambo3
rambo3a
rambo3ae
rambo3 NO dip Switch Setting for Track Ball. I think this might be the prototype version.
3a and 3ae both have dip switch setting but just setting control to TrackBall did not work until ROM restart. DIP switch settings are saved.
If settings get screwed up in ROM dir erase mame2003.cfg rambo* files