Components to build the EndBOX I and the assembled EndBOX I Micro. About a month ago, I officially unveiled the EndBOX: a retro-style micro-computer designed to run the EndBOX OS. And what is the EndBOX OS, you ask? It’s a small NetBSD system engineered to launch you into an EndBASIC interpreter as fast as possible. Today, I’m excited to announce the DIY guide to build your very own EndBOX and the first official disk images of the EndBOX OS!