yea you need to assign that key JVS TEST to your controlls, assign it next to your test mode keys, press it down once and scroll through using left and right (up,down ,left ,right keys pad). till you get to i/o/test mode hold the mouse/lightgun trigger to start. hold it on the calibration targets, -shoot twice -shoot center BAM!!!! configured saved done
only problem with that game is you can get a highscore (which is great but the high score ranking board has all missing text so you cant see your own highscores so in my books its not really worth playing at all atm unless you want missing highscores shame shame really same with many of the arc games text and info all missing bits n bobs for me
i72600k 3.4-4ghz amd6450
one game on my mind GUNMEN WARS plz mame ?