04394: All games with paddle inputs: IPT_PADDLE inputs do not center properly when mapped to an analog joystick

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
04394	DIP/Input	Major	Always	Jun 29, 2011, 15:03	Oct 27, 2011, 05:38

Tester	AWJ	View Status	Public	Platform	SDLMAME
Assigned To	AWJ	Resolution	Fixed	OS	Linux
Status [?]	Resolved			Driver
Version	0.143	Fixed in Version	0.143u9	Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	04394: All games with paddle inputs: IPT_PADDLE inputs do not center properly when mapped to an analog joystick
Description	When you have a MAME paddle input mapped to an analog joystick axis (such as an Xbox or PS3 pad), the paddle position does not return to the center if you release the joystick quickly. It does return to the center, sometimes, if you slowly ease the joystick back to the center position. Bizarrely, this bug only occurs with IPT_PADDLEs, and not with IPT_AD_STICKs, even though the two should be functionally identical.
Steps To Reproduce	1. Hook up an analog joystick and configure MAME to use it 2. Run outrun, or any other game with a paddle input 3. Start a game 4. Press the analog joystick to one side, then release it quickly 5. Observe that your car continues to turn even after you release the joystick
Additional Information	Regression is SVN r12739 (low-level input upgrade)
Github Commit

Flags
Regression Version	0.142u5
Affected Sets / Systems	All games with paddle inputs

Attached Files

No.07588 Fujix Administrator Jun 29, 2011, 16:32	Confirmed with my PS2 pad in OutRun.
No.07589 AWJ Developer Jun 29, 2011, 16:48	I think I've found what the problem is and why it only affects paddle games and not analog joystick games. The default input assignment for Paddle Analog is "Mouse X or Joy 1 A0" (mouse is listed first). The default input assignment for Analog Stick X, on the other hand, is "Joy 1 A0 or Mouse X" (joystick is listed first). If I reassign the Paddle Analog input so that the joystick is the first thing listed, the problem goes away. It looks like somehow the mouse and joystick inputs are fighting each other, even when the mouse is not enabled (mouse is set to 0 in my mame.ini) Again, this did not happen prior to 12739.

No.07588

Fujix

Administrator

Jun 29, 2011, 16:32

Confirmed with my PS2 pad in OutRun.

No.07589

AWJ

Developer

Jun 29, 2011, 16:48

I think I've found what the problem is and why it only affects paddle games and not analog joystick games.

The default input assignment for Paddle Analog is "Mouse X or Joy 1 A0" (mouse is listed first). The default input assignment for Analog Stick X, on the other hand, is "Joy 1 A0 or Mouse X" (joystick is listed first). If I reassign the Paddle Analog input so that the joystick is the first thing listed, the problem goes away.

It looks like somehow the mouse and joystick inputs are fighting each other, even when the mouse is not enabled (mouse is set to 0 in my mame.ini)

Again, this did not happen prior to 12739.