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While it's stated on MAME's official troubleshooting pages, it seems a lot of people don't know about how to fix the gun calibration issue with Beast Busters.

Basically, in order for the guns to function properly, you have to calibrate them in the service menu, however, you have to calibrate ALL THREE of them properly, otherwise none of them will work properly. Even if you're just playing with player one, you have to calibrate all three.

Therefore, I'm suggesting that we add a note to the special rules regarding calibration of all three guns to make things easier for future players.

In current versions they're calibrated by default, at least for mouse usage.

Well it might be helpful to note that for older versions, like Wolf106?

note added, i'll add which current version started auto calibration if someone knows.

Chad wrote:note added, i'll add which current version started auto calibration if someone knows.

From MAWS:
0.128u4: Brian Hargrove added clone Beast Busters (US, Version 2). Changed description to 'Beast Busters (World)'. David Haywood tweaked gun handling in Beast Busters a bit, by halving the precision of the guns to 7-bit they can be calibrated more easily, maybe the originals were like this. Added also a default EEPROM with them calibrated in a 'reasonable' way for MAME. Sound is pretty awful on this, maybe the sound ROMs should be checked? Adjusted volume balance slightly.