Prizm Marketing Analysis Computer - circa 1980


Hand Built Wire Wrapped Prototype - Working Model



  1980 - A hand wire-wrapped 3D, electronic model of the Prizm Marketing Graph originally done on paper in a workbook format and colored by hand. Front to Back = Urban to Rural <br> Left to Right = Minority to Majority <br> Height of post = economic level <br> size of ball = population in that sector The keyboard and main housing were vacuum-formed using wooden molds over window screen with a space heater and a vacuum cleaner. Keyboard allowed setting of colors to balls by hand <br>(later to be set by IBM PC software) A 64 bit memory bank of 16 7408 quad AND gates  

  Hand wire-wrapped during Thanksgiving Dinner festivities 1980 Most parts available in Richmond, Va in 1980 - not today Many parts from Radio Shack - not today Each post is a section of PC board with 5 traces <br>which fits into a socket connected to 5 SCR's <br> and their associated capacitors and resistors to form a locking gate this allowed each light to be latched on for a particular product  

  grouping under the main board surface Ain\'t she sumpin?  

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