Main > Lightguns
Lightgun calibration issues with USB2GUN board in MAME
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purbeast:
I also just noticed when I click on "Machine Information" from the tab men in game, it shows the correct resolutions on that screen. 



But I think the issue is that it's loading up in the 360x240 resolution and that I can't figure out yet.
purbeast:
Well I can now confirm that this is a MAME issue and not an actual gun calibration issue.

I just got the model2 emulator up and running and Virtua Cop plays flawlessly.
purbeast:
So I'm still having no luck with this.  I have been messing with settings this evening and nothing.  It does seem like in MAME, it is "tracking" as if the monitor is a square, however it's 4:3 so it's not a square obviously.  Check out this video here, You can see it starts to move faster than I am as I move to the edges.  I hope you can tell from the video.



But the here is Virtua Cop on the model2 emulator and it's tracking just fine, even right by the edge of the screen, so that is why I think it is some sort of MAME issue.

PL1:
Not certain if this will help, but what is the joystick_saturation set to in mame.ini?
- Instead of the default 0.85(?), try increasing it to 1.00.

The video looks like you already adjusted the joystick_deadzone from the default of 0.3(?).


--- Code: ---#
# CORE INPUT OPTIONS
#
 . . .
joystick_deadzone         0.05
joystick_saturation       0.85

--- End code ---


Scott
purbeast:

--- Quote from: PL1 on March 11, 2025, 12:28:56 am ---Not certain if this will help, but what is the joystick_saturation set to in mame.ini?
- Instead of the default 0.85(?), try increasing it to 1.00.

The video looks like you already adjusted the joystick_deadzone from the default of 0.3(?).


--- Code: ---#
# CORE INPUT OPTIONS
#
 . . .
joystick_deadzone         0.05
joystick_saturation       0.85

--- End code ---


Scott

--- End quote ---

I have the deadzone set at 0.00 and then the joystick_saturation was set to 0.95 after seeing JollyWest's post, and then when I was messing around last night, one of the changes I tried was changing it to 1.0 and that didn't make any noticeable difference.
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