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why does my screen pan left/right with a hard turn on my spinner in MAME?
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Bobbler:
Sounds like screen tearing perhaps?
Set the Vertical Sync setting in your graphics cards driver or within your emulator.
Timoe:
Its not a laptop and its not an LCD

Its my main cabinet and it uses a TV so the resolution is set to 640x480

and it only happens in mame.

any ideas?
screaming:
what resolution is the game starting in? Are you specifying it in mame's mame.ini file or are you letting it auto detect?
Timoe:
probably auto detect
Xiaou2:
 Your card may be outputting 640*480... but Mame will often try to output a higher
resolution if its not properly limiting this.   

 So, when mame ups the res, and the card cant go any higher,  the card
interprets this and does the next best thing..   To keep the res at
640, and to make the screen lager than the actual physical display.

 This is how all the ATI cards function.  Not sure about others,
but i suspect the same.

 Usually its vector games in mame that do this..   because vector games
try to use the highest res possible.   Also, if artworks are turned on,
mame will also try to use higher resolutions.

 Finally, there is the possibility of external programs interferences...
such as mouseware programs that sometimes glitch. Try disabling them.

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