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Resident of West St. Louis County, Missouri
Personal Pinball Site: http://webpages.charter.net/chibler/Pinball/index.htm
I've been repairing pins since my first acquisition in 1991 (Gottlieb Centigrade 37). My collection of 60 or so games is split between Gottlieb EMs and a mix of solid state games.
Oldest game: 1962 Gottlieb Rack-A-Ball
Newest game: 1995 Williams Attack from Mars
Order placed for Jersey Jack Pinball Wizard of Oz, scheduled for March 2012 delivery.
Chris, blanking signal is actually a periodic signal I know you're in the process of editing, but it is an important distinction. Obviously it's high most of the time, but it dips low at least once every display interrupt (to clear the displays).
If only it worked as desired to prevent coil lockout (*sigh*)