Xbox os, a reskin of command.com on ms-dos 1.25. I must be bored with life.
Of course! The source code for 1.25 has been officially released by Microsoft themselves years ago. I took their stuff and reskinned it.
Download the boot disk from the releases tab. Boot into a virtual machine (or an x86 computer) with the boot disk and type mk all. Because command.com in the disk has been precompiled, you might need to delete and recompile command if you are compiling with mk all.
The alternate download site can be found here: https://cleantalk.cf/xboxos
GNU GPL 2. No more