July 21, 1987
Nintendo and Sony announced that Super Mario Bros. 3 would be released on a dual cassette/CD format add-on for the Family Computer, sometime for release in 1988. Design work will be done by Shigeru Miyamoto, the creators of Super Mario Bros. 1 and 2.
Nintendo and Sony also announced plans to launch the QuadSystem, a quadruple combo of the original Family Computer, the Family Computer Disk System, the Family Computer Cassette System and the Family Computer Compact Disk System (it was succeeded by the combo PlayStation in the early 1990s when the Super Famicom arrived).
Sony Interactive Entertainment Inc. was formed in 1986, which was headed by Olaf Olafsson, and it was currently under contract with Nintendo Co., Ltd. to develop technology software and producing games for the Family Computer.
Sunsoft says it obtained the rights from Sullivan Bluth Studios to launch Dragon's Lair and Space Ace onto the Famicom Cassette System. A US version, the Nintendo Cassette System, came out in the September of 1987.