Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
The adder at the heart of Intel's 8087 floating-point chip
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In 1980, Intel released the Intel 8087 floating-point coprocessor, a chip that could make math up to 100 times faster. As well as arithmetic...
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Powering up a module from the IBM 604: an electronic calculator from 1948
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1948 was an interesting time for computing. For decades, businesses had used punch card equipment that added and sorted electromechanically....
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Microcode inside the Intel 8087 floating-point chip: register exchange
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In 1980, Intel introduced the 8087 floating-point chip, a co-processor that made floating-point operations up to 100 times faster. This chip...
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Reverse engineering circuitry in a Spacelab computer from 1980
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Spacelab was a reusable laboratory that could be carried in the cargo bay of the Space Shuttle, providing lab space for astronauts and exper...
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