Die analysis of the 8087 math coprocessor's fast bit shifter
This article provides a technical analysis of the Intel 8087 floating-point coprocessor, focusing on its high-speed binary shifter circuitry. It explains how the chip revolutionized microcomputing by enabling fast, accurate floating-point math.
Why it matters
The 8087 chip was a foundational component in the history of computing, establishing the IEEE 754 standard still used in modern processors.
Floating-point numbers are very useful for scientific programming, but early microprocessors only supported integers directly. 1 Although floating-point was common in mainframes back in the 1950s and 1960s, it wasn't until 1980 that Intel introduced the 8087 floating-point coprocessor for microcomputers. 2 Adding this chip to a microcomputer such as the IBM PC made floating-point operations up to 100 times faster. This was a huge benefit for applications such as AutoCAD, spreadsheets, or flight simulators. 3 The downside was the 8087 chip cost hundreds of dollars. 4
The content is purely technical and historical, devoid of political or social bias.
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