From the collection Dr. David P. Chandler on the site http://papaintellivision.com/
The documents herein regard the Mattel Electronics Intellivision project ranging from its inception in 1977 until the end of Chandler's involvement with the company in 1983.
This document is a further collection of paperwork relating to the Chemical Bank Terminal project Viewdata for the Intellivision. These documents go into more specific technical details on Mattel’s end with several additional diagrams and proposals. On Page 13 it can be seen that consideration for the light pen peripheral as of February 9, 1981 was temporarily dropped. Pages 24 to 49 outline a Chemical Bank Terminal cartridge for the Atari 8-bit computer line.
Pages 50 to 56 provides an overview of the Intellivision integrated system specifically for home banking provided by ADP with a full product schedule as of March 22, 1983. Pages 57 to 66 detail yet another Intellivision Videotex integrated system called the Intelletex Module. Pages 65 to 66 show a handwritten flowchart for banking software, not to be available with the initial software release. Pages 67 to 68 are another letter from ADP to Mattel, dated May 24, 1983 revising the schedule for the planned rollout of the banking terminal system.
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