Is there a workaround for MAME pot issue

[Retro77]

Hi all,

I wondered if anyone knew of a workaround when using GroovyMAME and setting pedals as buttons?

What I mean by this is, MAME will allow me to set the accelerator pot on for example, Special Criminal Investigation but when I press it in game it has no effect. I am guessing it is because there are several games that used switches instead of real potentiometers.

Is there a way around this? It would be a shame to have to remove some of these from the cab.

Thanks

[PL1]

I wondered if anyone knew of a workaround when using GroovyMAME and setting pedals as buttons?

What I mean by this is, MAME will allow me to set the accelerator pot on for example, Special Criminal Investigation but when I press it in game it has no effect. I am guessing it is because there are several games that used switches instead of real potentiometers.

Is there a way around this? It would be a shame to have to remove some of these from the cab.

MAME allows you to map an analog pedal axis to a button/microswitch pedal input.
- Highlight the input.
- Press ENTER.
- Press the pedal.

Just tried mapping an analog stick's Y-axis up to gas and Y-axis down to brake in SCI.
- Gas and brake worked perfectly during gameplay.
- The axis mapped whether it started in the center like an analog stick or at the end of the axis like an un-pressed pedal.
-- As long as MAME registers that the analog control moves far enough in a certain direction, it will map that direction to the input.

If your pedal maps to the input, that indicates that MAME sees it and that it should work during gameplay.   


Scott

[Retro77]

Hi Scott,

Thanks for the response. I have just tried it again. I noticed that when I pressed a pedal on Gas Switch it mapped 2 controls.

Joy 2 Left Joy 2 Right

This works for the games that use potentiometers as far as I can tell so I assumed this was correct because for those games it just gets mapped as a Joy axis.

I am using an APAC. So I am thinking that maybe I have wired it incorrectly.

I deleted a control from each of the pedals on SCI.xml and now both pedals work. So I can roll out that fix to the other games.

Thanks again.

[PL1]

I noticed that when I pressed a pedal on Gas Switch it mapped 2 controls.

Joy 2 Left Joy 2 Right

Sounds like you quickly pressed and released the pedal.

If you press and hold the pedal for a few seconds, it should only map one direction.   

I am using an APAC. So I am thinking that maybe I have wired it incorrectly.

If the potentiometer center tab was wired wrong, you shouldn't get "Joy 2 Left" or "Joy 2 Right" mapped to an input.
- Check Windows Control Panel -- Devices and Printers -- right-click the game controller icon -- game controller settings -- properties to confirm that the pedal is working correctly.

Pretty sure that the only way your current setup could be mis-wired is if the axis moves in the opposite direction desired.
- If that is the case, swap the wires on potentiometer tabs 1 and 3 (5v and ground) or you can reverse the axis in the MAME "Analog Controls" menu.


Scott

[Retro77]

Thanks for the tip. This is my first cab build, so assumed that was normal behaviour.

The pedals look to be working normally in Windows.