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The Nintendo Entertainment System Game Pak is the software storage medium for the Nintendo Entertainment System. All officially licensed NTSC-U and PAL region cartridges, or "carts", are 5.25 inches (13.3 cm) tall, 4.75 inches (12 cm) wide and 0.75 inches (2 cm) thick. Early NES Game Paks are held together with 5 small, slotted screws. Games released after 1987, designated "Rev-A" on the back label, were redesigned slightly to incorporate two plastic clips molded into the plastic itself, eliminating the need for the top two screws. This is why older NES carts are referred to as "5-screw" and are distinguishable by their flat tops and, as the name suggests, five screws instead of three. Around this time, the standard screws were changed to 3.8 mm security screws to further secure the ROMs inside from tampering. The back of the cartridge bears a label with instructions on handling, explaining that the cartridge is not to be stored in extreme temperatures, not to be immersed in water, and not to be cleaned with benzene, thinner, alcohol, or other such solvents. These labels are gray for standard games and gold (or in rare cases silver) for games that feature battery-powered storage. Production and software revision codes were imprinted as stamps on the back label to correspond with the software version and producer. With the exception of ''The Legend of Zelda'' and ''Zelda II: The Adventure of Link'', which are available as gold plastic Game Paks, all vintage licensed NTSC and PAL cartridges are a standard shade of gray plastic. Vintage unlicensed carts were produced in black (Tengen, American Video Entertainment and Wisdom Tree), robin egg blue (Color Dreams and Wisdom Tree) and gold (Camerica) and bear a slightly different shape and style than a vintage Nintendo-licensed NES Game Pak. Nintendo also produced yellow-plastic carts for internal use at Nintendo Service Centers, although these "test carts" were never made available for purchase by consumers. Famicom cartridges are shaped slightly differently, measuring only 2.75 inches (7.0 cm) in length, and 4.25 inches (10.8 cm) in width. While the NES uses a 72-pin interface, the Famicom system uses a 60-pin design. Some early NES games, most commonly ''Gyromite'', are actually 60-pin Famicom PCBs and ROMs with a built-in converter. Unlike the predominantly gray colored NES Game Paks, official Famicom cartridges were produced in many colors of plastic. Adapters, similar in design to the popular accessory Game Genie, are available that allow Famicom games to be played on an NES. ==60-pin vs. 72-pin cartridges== The original Famicom and the re-released AV Family Computer both utilize a 60-pin cartridge design.〔 This yields smaller cartridges than the NES, which utilizes a 72-pin design. Four pins are used for the 10NES lockout chip.〔(【引用サイトリンク】title=NES – Famicom Cartridge Pinout Sheet )〕 Ten pins were added that connect a cartridge directly to the expansion port on the bottom of the unit. Finally, two pins that allow cartridges to provide their own sound expansion chips were removed. Some early games released in North America are simply Famicom cartridges attached to an adapter, such as the T89 Cartridge Converter, to allow them to fit inside the internally compatible NES hardware.〔 Nintendo did this to reduce costs and inventory by using the same cartridge boards in North America and Japan. The cartridge dimensions of the original Famicom measure at 5.3 × 3 inches, compared with 4.1 × 5.5 inches for its North American redesign. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nintendo Entertainment System Game Pak」の詳細全文を読む スポンサード リンク
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