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AMD started in the x86 business being a second-source manufacturer for Intel's chip designs. IBM demanded all its suppliers to have a second manufacturing source, and Intel had to license another company to secure the IBM PC contract. The Am286 was one of the results of this contract, earlier examples being the AMD versions of the 8086, 8088, 80186 and 80188. Essentially just an 80286, the Am286 was in reality Intel-designed all the way, pin and instruction compatible, based upon Intel's microcode. The chip was later sold by AMD as an embedded processor. It had an advantage over its Intel brethren: a higher clock speed. Intel’s 286s topped out at 12.5 MHz before they switched production to the i386, but AMD continued the production of 286 CPUs and had a 16 MHz version of the 286 for sale in August 1987, later even offering a 20 MHz version. Image:Ic-photo-AMD--R80286-10 S-(286-CPU).png|A CLCC version of the Am286-10 Image:Ic-photo-AMD--R80286-12 S-(286-CPU).jpg|A CLCC version of the Am286-12 Image:KL AMD 80286 CLCC Bottom.jpg|A CLCC version of the Am286-16 Image:Ic-photo-AMD--N80L286-16 S-(286-CPU).png|A PLCC version of the Am286-16 Image:Am286.jpg|Am286 processor. The DIP socket on the left can be used to add an 80287 coprocessor. Image:KL_AMD_Am286LX_ZX.jpg|The Am286ZX/LX is a SoC version of the Am286. Image:KL_AMD_Am286ZX_Marketing_Sample.jpg|Am286ZX Marketing Sample. ==External links== * (Am286 category at chipdb.org ) * (Am286 at cpu-collection.de ) * (Am286 at cpu-world.com ) 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「Am286」の詳細全文を読む スポンサード リンク
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