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The Am386 CPU was a 100%-compatible clone of the Intel 80386 design released by AMD in 1991. It sold millions of units, positioning AMD as a legitimate competitor to Intel, rather than being merely a second source for x86 CPUs. While the AM386 CPU was essentially ready to be released prior to 1991, Intel kept it tied up in court.AMD had previously been a second-source manufacturer of Intels Intel 8086, Intel 80186 and Intel 80286 designs, and AMDs interpretation of the contract, made up in 1982, was that it covered all derivatives of them. Intel, however, claimed that the contract only covered the 80286 and prior processors and forbade AMD the right to manufacture 80386 CPUs in 1987. After a few years in the courtrooms, AMD finally won the case and the right to sell their Am386 in 1992. This also paved the way for competition in the 80386-compatible 32-bit CPU market and so lowered the cost of owning a PC.