Reverse engineering the silicon in the ARM1 processor

https://www.electronics-lab.com/reverse-engineering-the-silicon-in-the-arm1-processor/

righto.com has reverse enginnered one of the most popular proccessors: 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 bits in a 16-bit field, showing how individual transistors form multiplexers, which are combined into adders, and finally form the […]