Ken Shirriff's blog

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

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 ...
1 comment:

Reverse engineering the ARM1, ancestor of the iPhone's processor

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Almost every smartphone uses a processor based on the ARM1 chip created in 1985. The Visual ARM1 simulator shows what happens inside the...
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