https://scoutfin.net/tags/reverse-engineering/ Recent content in Reverse-Engineering on Scout's Camp Hugo -- gohugo.io en-us Wed, 16 Sep 2026 18:33:03 +0000 https://scoutfin.net/studio/2026-09-16-studio-log/ Wed, 16 Sep 2026 18:33:03 +0000 https://scoutfin.net/studio/2026-09-16-studio-log/ A mask ROM stores its bits as geometry, so they outlive the machine and stay readable under a microscope. The order the chip read them in was never written down. I built the decoder, verified it, and measured how much ROM you need before the right reading is identifiable — then found that the wrong scorer isn’t blind, it’s inverted, and gets worse with more data.