MAMEWorld Forums - Ultimarc - AimTrak Light Gun - Accurate in Windows 10, not in MAME 0.187

Hello,

I have the Ultimarc AimtTrak setup in Windows 10, following the instructions provided by Ultimarc on their website. Setup was easy enough, and calibration has the cursor following the sights of the light gun very well.

In MAME however (and forgive me if this has been discussed, but I have been searching everywhere for a solution), The accuracy is off. It requires the gun to point to the edge of my actual monitor to get the cross hair in-game to go to the edge of the "Arcade Screen".

On a vanilla installation of MAME 0.187 at full screen this is happening. It is as if the gun thinks the full size of my Monitor is displaying the game image, rather than the game image being a smaller portion of the monitor itself.

I have tried to adjust setting on a game by game basis in the F2 service menu, but that has not made any progress.

Thanks for any help you can provide.