Exidy 440 collision interrupt error

gb3199

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Aug 22, 2002
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Westlock, Alberta, Canada
Got my Cheyenne off the slab tonight …*well kind of. Long story short, I had found an untested boardset and when it booted up Combat came on the screen.
I was pumped as the machine has been sitting in the corner of the basement for the past two years with a variety of problems.
So everything seemed to work OK, except when I tried to play a game I could shoot, but there was no collision detection.
So went into diagnostics under check interrupts and it said frame interrupt was OK, but there was a collision interrupt error.
All other tests checked out fine, although the gun sighting didn't seem right.
Anyways we disassembled the gun and fiddled around the with the optic sensitivity to where it seemed OK, but again it didn't seem quiet right.
Has anyone experienced this specific issue and can you point in the right direction for the fix.
 
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