Source available on GitHub: <a href="https:&#x2F;&#x2F;github.com&#x2F;mit-pdos&#x2F;xv6-public" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;mit-pdos&#x2F;xv6-public</a><p>Unless I&#x27;m missing something, the entire codebase is just 102 files (including README and such), no subdirectories, and 12,000 lines.<p>What a fantastic tool.