I have been testing this new spinner (Ultimarc, naturally) with Cameltry, in MAME set 0.265. My mame.ini file is in the root of the MAME directory.
If I run MAME directly from the command prompt, I can see that under Input Device Options -
Trackball, Paddle, Dial and Mouse Device assignments ALL = mouse
and under General Settings - Input Assignments (Player 1 Controls):
Paddle Analog = Mouse 3 X
Paddle Analog Inc = Mouse 3 X +
Paddle Analog Dec = Mouse 3 X -
...I was able to set these by turning the spinner (after hitting ENTER to change the setting).
In MAME.INI: mouse = 1, multimouse = 1
Cameltry WORKS under MAME running from a command prompt.
In Launchbox (and in Windows 10), the spinner will send the pointer left and right (as it's obviously being used as a linear mouse), but does not work in the game. The configuration for Input Assignment for Player 1 simply says MOUSE, and I cannot change it to anything but random keypresses...spinning the spinner does not seem to register there.
What am I missing? I have combed the forum for various suggestions that have worked for others, but this is perplexing.