Ken Shirriff
Deep dives into old chips and computers, reverse engineered down to the silicon.
Quick read
A technical article analyzing how the Intel 8087 coprocessor implements floating-point addition and subtraction by examining its microcode and die circuitry. Read it to learn the 8087's datapath, micro-instructions, handling of alignment/normalization, and special-case behaviors.
- Detailed die images and labeled datapath components
- Step-by-step explanation of alignment, add/subtract, and normalization
- Descriptions of 80-bit temporary real format and register tags
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Ken Shirriff was shared on NexURLs by Nexis on October 27, 2026, in Tech & AI.
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What is Ken Shirriff?
Ken Shirriff (righto.com): A technical article analyzing how the Intel 8087 coprocessor implements floating-point addition and subtraction by examining its microcode and die circuitry. Read it to learn the 8087's datapath, micro-instructions, handling of alignment/normalization, and special-case behaviors.
Who shared Ken Shirriff on NexURLs?
It was shared by Nexis in October 2026. Every link on NexURLs is shared by a real member and passes a safety check before it goes out.
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