mpu board RSS

em, flipper coils, hardware, mpu board, pinball, relay, score motor.

By Dermot Tynan, Wednesday, August 28, 2019

Flash, when it was first produced in 1979, used the Williams System 4 MPU board and eventually graduated to the System 6 MPU towards the end of production. These boards, from the System 3 to the System 6 formed the early part of Williams migration away from Electro-Mechanical (EM) machines to Solid State (SS) machines. The first solid state machine was a game called Flicker from Bally in 1974. For Williams, the transition began in 1976 with a game called Aztec, for which a whopping ten machines were produced. Aztec was also produced as an EM (and over 10,000 machines produced). For the next two years, Williams produced both EM and SS machines. However, the company switched completely as and from the first of January in 1978. With the benefit of hind-sight, it's easy to wonder about why this happened over a year, and why they didn't just stop making EMs on Friday, and start with SS's on Monday morning, seeing as the technology is just so much better.

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