CPUpages.comRapidCAD-1

The Intel RapidCAD is, in rough terms, an Intel 486DX with the 8 kB on-chip cache removed and a 386 pinout. To software, it appears to be a 386DX with a math coprocessor, as the 486-specific instructions have been removed from its instruction set. It is marketed by Intel as "the ultimate coprocessor" and, as the name implies, its main purpose is to replace the 386DX in existing systems and thereby boost the performance of floating-point intensive applications.RapidCAD is delivered as a set of two chips. RapidCAD-1 is a 132-pin PGA (pin grid array) chip that goes into the CPU socket and replaces the 386DX. It contains the CPU and the FPU (floating-point unit). RapidCAD-2 is a 68-pin PGA chip that goes into the 387 coprocessor (or EMC) socket; it…
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