Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
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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Understanding the x86's Decimal Adjust after Addition (DAA) instruction
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I've been looking at the DAA machine instruction on x86 processors, a special instruction for binary-coded decimal arithmetic. Intel...
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