AMD P80C287

This page will show all objects that classify as AMD P80C287. The P80C287 has been made by Advanced Micro Devices, a multinational semiconductor that develops microprocessors, chipsets and graphic processors (ATi). AMD is the second largest microprocessor manufacturer after Intel and has active since 1969.

In 1982 AMD signed a contract with Intel to become a licensed second-source manufacturer. IBM wanted the Intel 8086/8088 but IBM's policy stated that at least two suppliers should be available. This is why the first AMD processors always have 'Intel' printed somewhere. After a while AMD didn't get the license to produce Intel processors anymore and thus AMD started cloning the 386 and launched the Am386. Since the AMD K5, AMD didn't clone the Intel processor but started developing on their own. The K5 wasn't a big success but thanks to NexGen that merged into AMD the K6 could be made. AMD could compete and has a range of processors today including six-core Opterons and a good performing quad-core for the desktop called the Phenom II X4.

AMD also acquired ATi to get in-house graphics chips. These are integrated in chipsets to create cheap motherboard solutions. In the future (The Future is Fusion as AMD calls it) the plans are to integrate the graphics chip into the processor.

View processor details AMD P80C287 -10 'N/A'
AMD P80C287 -10 'N/A'

This a co-processor (FPU; for floating point calculations) for the 80286 processors. It's similar but not pin-compatible to the 8087. The number of instructions and execution time of instructions is practically identical with the 80287 compared to the 8087. The main difference between the 80287 and 8087 is the way how the CPU communicates / interfaces with the co-processor.

You can run a 10MHz 80287 FPU with a 12MHz CPU. This is because the CPU divides the base clock by 1/2 and the FPU by 1/3 meaning that the FPU always runs a few MHz slower. > Read more