Somewhere around the time he made $140,000,000 selling an indie game to gobs of people who love to create, then announced he was writing another game which included a CPU.
OK so the ABI is kindof a mess, and the IO spec isn't finished yet etc. But it's fun to hack on something in your spare time with a community around it. He did that with Minecraft, and I guess he's doing it again with this CPU. http://0x10cwiki.com/wiki/Main_Page and http://www.reddit.com/r/dcpu16
