Faulty Gun Check in Police 911 / Police 24/7 / The Keisatsukan in MAME

One of the big reasons why you are not able to play this and Police 911 2 in MAME, aside from the lack of motion sensor emulation, which is still yet to come, and inaccurate graphics emulation which needs to be improved significantly.
As you can see, I drag my crosshair across the screen to point and shoot at different positions. While the center is fine, shooting anywhere else makes it completely off. Like shooting at the top makes it shoot on the right of the screen. Shooting left makes it shoot on top of the screen upwards. In other words, the X and Y coordinates are not properly set.

[@joseph3000games]

It's interesting, your crosshair position is being translated correctly, where for example if you shoot on "your" screen in the bottom left, it outputs on the bottom left of the "game" screen, which is rotated 90 degrees CW and would appear more like on the top left or so. I'm not familiar with how emulation really works, but this is at least what is happening here.