Coprocessor
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A coprocessor is a computer processor used to supplement the functions of the primary processor. Operations performed by the coprocessor may be floating-point arithmetic, graphics, signal processing,
AM9511-1 arithmetic coprocessor
Intel 80386DX CPU with 80387DX math coprocessor
X87
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x87 is a floating-point-related subset of the x86 architecture instruction set. It originated as an extension of the 8086 instruction set in the form of optional floating-point coprocessors that work
Coprocessor
…it in IBM PC design and Intel stopped development of this type of coprocessor. The Intel 80386 microprocessor used an optional "math" coprocessor (the 80387) to perform floating-point operations directly in hardware. The Intel 80486DX processor included floating-point hardware on the chip. Intel released a…
16 MHz version of the Intel 80C187
Intel 80287 die shot
Intel 80287XLT
Intel 80387 CPU die image