One game that drives me nuts and is outright unplayable is Front line because of its use of a digital rotary instead of a standard spinner. Would there be a way to modify its control so that we could play the game and remap the arm movement to an analog spinner, which on a control pad could be the L or R buttons or Left Trigger / Right trigger? Games like Tron are superbly playable by mapping them to a controller via the L/R buttons. nothing beats a spinner but at least in letting us map that control to those two buttons, it's playable. Front line without, is not playable at all on a control pad
Front Line is one of six games that use a "Taito Aim-n-Fire" style controller:
- Front Line
- The Tin Star
- Wild Western
- Sheriff (Nintendo)
- Bandido (Exidy -- licensed re-release of Sheriff)
- Western Gun Part II (Taito -- licensed re-release of Sheriff)

The "Aim-n-Fire" acts like a top-fire 8-way joystick where a cardinal direction (U/D/L/R) or diagonal is always pressed. It is used to . . . aim and fire.

- On a twin-stick cab (think Robotron), you can map the right stick to both the aim inputs and the fire input.
- You should be able to do the same with a gamepad that has twin thumbsticks.

Another option is the rotary joystick from GRS. They are available as a stick you can install on your cab or as a fightstick.
With the right settings in MAME, the appropriate mode selected, and the correct handle installed, this stick works like these specialized controllers:
- Mechanical rotary joystick
- Optical rotary joystick
- Taito Aim-n-Fire
- Atari Twist-to-Turn joystick (Xybots)
- Push/Pull spinner
Front Line gameplay shown from 49:20 - 56:23.
Scott