A great way to run Z80 code directly on a Z80 while simulating ROM/RAM & IO. Could be better documented as regards some of the tools you need to build projects (assembler etc.), would make it easier for complete newbies who've never experienced the Z80 . A good way to prototype before committing to building an actual board. As a Z80 developer from back in the day, I found it very nostalgic. I'm moving an old (simple but useful) monitor to the board and I'll release it when I've polished it up (and documented!).