Ken Shirriff's blog

Computer history, restoring vintage computers, IC reverse engineering, and whatever

Reverse-engineering the interrupt circuitry in the Intel 8086 processor

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Interrupts have been an important part of computers since the mid-1950s, 1 providing a mechanism to interrupt a program's execution. ...
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Reverse-engineering an electromechanical Central Air Data Computer

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Determining the airspeed and altitude of a fighter plane is harder than you'd expect. At slower speeds, pressure measurements can...
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Silicon reverse-engineering: the Intel 8086 processor's flag circuitry

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Status flags are a key part of most processors, indicating if an arithmetic result is negative, zero, or has a carry, for instance. In thi...
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