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A bug fix in the 8086 microprocessor, revealed in the die's silicon
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The 8086 microprocessor was a groundbreaking processor introduced by Intel in 1978. It led to the x86 architecture that still dominates de...
A bug fix in the 8086 microprocessor, revealed in the die's silicon A bug fix in the 8086 microprocessor, revealed in the die's silicon The 8086 microprocessor was a groundbreaking processor introduced by Intel in 1978. It led to the x86 architecture that still dominates desktop and server computing. While reverse-engineering the 8086 from die photos, a particular circuit caught my eye because its physical layout on the die didn't match the surrounding circuitry. This circuit turns out to implement special functionality for a couple of instructions, subtlely changing the way they interacted wi
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