The original design of the NES was worked out over several months including a stay of a couple of months while I worked in Japan at NCL. The design was conceived as a wireless, modular system, designed to look more like a sleek stereo system rather than a electronic toy. After the first public showing in the US at the Consumer Electronics Show, I was asked to redesign the case based on new engineering requirements. To reduce costs, the wireless function was eliminated, as well as some of the modular components such as the keyboard and data recorder. But the biggest change was the orientation and size requirements to accommodate a new edge connector for inserting the games. The new edge connecter was a "zero force" design that allowed the game to be inserted with low force, and then rotated down into the "contact" position. The case had to be designed around the movement of the game, and required the shape and size of the NES to grow from the earlier concepts. Many of the features remained, such as the two-tone color, left and right side cuts, and overall "boxy" look, but the proportions change significantly to accommodate the new edge connector.hii,


I didn't find the right solution from the Internet.

References: http://www.neogaf.com/forum/showthread.php?t=1438044

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