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Kiosk Multiplexer The electronic brains behind the large kiosk displays used in stores to sell Mattel Electronics’s Intellivision games and consoles. This deep-dive video covers a lot of material. This video is the culmination over almost 1 year of research including dumping and disassembling the ROM code as well as working out the schematic. Reverse Engineering documentation is located here: Mattel Kiosk Multiplexer Reverse Engineering Notes - 2020-03-11.pdf https://docs.google.com/document/d/1UDeJS-M6uQRu5MVHvmfKoLmsXHp4RZuBjOPrJtoSaD4/edit?usp=sharing The schematic has been worked out. Kiosk Multiplexer Schematic v2.pdf Here is some of the reference material used is the research: “Intellivision Store Display” video by Trade-N-Games: https://www.youtube.com/watch?v=7oJyhXORYpc “Mattel Intellivision Kiosk Demonstration” video by cylonrdr: https://www.youtube.com/watch?v=dW4O57cOiuQ Papa Intellivision main site: https://papaintellivision.com Papa Intellivision document that briefly mentions POP hardware: https://papaintellivision.com/pdfs/CCF10232011_00026.pdf I would like thank @intvnut, @decle, and the owner of the Rev B Kiosk Multiplexer for their help in this project. Mattel Kiosk Multiplexer Reverse Engineering Notes - 2020-03-07.pdf Kiosk Pre-1982 ROM and Disassembly.zip