- I had seen references to this trail for a while and wanted to visit. There is an old lime kiln somewhere along the trail. In July 2024, Mary and I visited and hiked about a mile from the trailhead before we had to leave (kiln not found). We will return in the future.
- Counting bits in hardware: reverse engineering the silicon in the ARM1 processor (righto.com)
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 bit counter. The ARM1 is the ancestor of the processor in most cell phones, so you may have a descendent of this circuit in your pocket.
