Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
Reverse engineering ARM1 instruction sequencing, compared with the Z-80 and 6502
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When a computer executes a machine language instruction, it breaks down the instruction into smaller steps that are performed in sequence....
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The ARM1 processor's flags, reverse engineered
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This article reverse-engineers the flag circuits in the ARM1 processor, explaining in detail how the flags are generate, controlled, and ...
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Conditional instructions in the ARM1 processor, reverse engineered
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By carefully examining the layout of the ARM1 processor, it can be reverse engineered. This article describes the interesting circuit used ...
More ARM1 processor reverse engineering: the priority encoder
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In this article, I reverse-engineer the priority encoder in the ARM1 processor. By examining the chip layout provided by the Visual ARM1 p...
Counting bits in hardware: reverse engineering the silicon in the ARM1 processor
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How can you count bits in hardware? In this article, I reverse-engineer the circuit used by the ARM1 processor to count the number of set ...
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