Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
The Group Decode ROM: The 8086 processor's first step of instruction decoding
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A key component of any processor is instruction decoding: analyzing a numeric opcode and figuring out what actions need to be taken. The ...
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Reverse-engineering the division microcode in the Intel 8086 processor
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While programmers today take division for granted, most microprocessors in the 1970s could only add and subtract — division required a sl...
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The microcode and hardware in the 8086 processor that perform string operations
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Intel introduced the 8086 microprocessor in 1978. This processor ended up being hugely influential, setting the path for the x86 architec...
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