page_title: Cassette Vision
section_title: Technical specifications
hierarchical_section_title: Cassette Vision / Technical specifications
caption_attribution_description: The Epoch Cassette Vision Jr., a video game console released exclusively in Japan in 1983. The Cassette Vision Jr. is a smaller and minimized version of the original Cassette Vision.
context_page_description: The Cassette Vision is a home video game console made by Epoch Co. and released in Japan on July 30, 1981. There is also a redesigned model called the Cassette Vision Jr.
  The term cassette is a contemporary Japanese synonym for ROM cartridge, not to be confused with the magnetic cassette tape format. In terms of power, it is comparable to the Atari 2600. The Cassette Vision has unusual controls: four knobs built into the console itself, two for each player; plus two buttons per player.
  The system originally retailed for 13,500 yen, with games priced at 4,000. The Cassette Vision sold around 400,000 units, and was the best selling video game console in Japan before Nintendo's Family Computer. It received a successor called the Super Cassette Vision. As a 1984 machine, the Super Cassette Vision was more comparable to the likes of the Famicom and Sega's SG-1000 line. The SCV was also sold in Europe, but with little known success. The Super Lady Cassette Vision, a version of the Super Cassette Vision that was aimed at a female market, was released exclusively in Japan.
context_section_description: Cassette Vision's controllers are integrated into the body.
  Cassette Vision
  2 x 2-directional lever switches
  4 x Push buttons
  4 x Revolving dials
  1 x Course switch
  1 x Select button
  1 x Start button
  1 x AUX. button
  Cassette Vision Jr.
  1 x 2-directional lever switch
  4 x Push buttons
  1 x Select button
  1 x Start button
  Epoch decided to capitalize on the NEC uPD77xx chipset as they had already used to develop games on this platform (TV Baseball, TV Vader). To achieve this, Epoch decided to put the CPU directly in the cartridge while the shell of the console would only contain the power supply, the controls and the video and sound output. Having the ROM, the RAM and the CPU in one chip, Epoch/NEC were able to create a chip that would support 48 bits instruction which was way faster than systems using a separate ROM at the time. Using 8-bit ROM though a BUS would have divided the speed by 4. Although having only the ROM on the cartridge would have reduced their cost drastically, it would have greatly increased the cost of the console itself, incur more R&D cost and delay the release of the console.
caption: The Cassette Vision Jr., a cost reduced and minimized version of the Cassette Vision released in 1983.
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