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Wednesday 14 February 2018 at 06:58
I spent most of the day (with a lot of interruptions) checking for shorts at the base of all the chips. (Didn't check U10 or U11). I didn't find anything.
I haven't verified U9 in another game but it's new.
Scope shows 533 KHz on U9 pin 3 and 37. Meter shows 523.2 at pin 3 and 522.9 at pin 37.
The s...
Source: http://pinside.com/pinball/forum/topic/stern-magic-rom-numbers#post-4229366