MAMEWorld Forums - Ultimarc - Spintrak with iPac 2 - cursor goes backwards with hard spin

Hello,

I seem to be having a mouse polling issue with my setup. I have the Spintrak connected to an iPac 2. I started on a Pi3 with Retropie and have also tested on my desktop PC and a laptop. In all three cases, if I give it a good hard spin, the cursor will go backwards, then correct itself and move in the correct direction as the spinner slows. If I do small, 1/4 turn movements, the cursor seems to track correctly. But if I do a quick 360 spin, the cursor actually moves slower than with the rapid 1/4 turn movements. So basically, any kind of fast spin and the cursor does not track properly. The desktop and laptop tests were done by simply moving the cursor back and forth on the screen. A hard spin sends the cursor in the opposite direction. I have tried the usbhid.mousepoll=2 in the retropie cmdline.txt file with no change. I tried 0-8 just for grins and could detect no change in mouse behavior.

Super frustrated. Have spent 30+ hours scouring the Internet for a solution. Spinner games are unplayable due to the lag/tracking issue I have.

Any suggestions you may have that may point to a fix would be greatly appreciated.

Thank you.