This is fantastic! Ever since I discovered jsLinux or more recently jor1k, I have been hoping for a complete x86 emulator in order to be able to run DOS.
According to the author, this project will be open-sourced once it'll be more polished and documented.
[1] http://bellard.org/jslinux/
[2] http://s-macke.github.io/jor1k/