JNOS 2.0 has made it to 4 different operating systems in one way or another ...
Linux is now the primary platform. The linux version of JNOS 2.0 is the one
on which I do all my development. It gets all the attention, updates, and so on.
DOS still has a strong user base, and is still supported in the sense that I try to
update it to the same version as the linux version when time permits. The DOS
version can easily fall behind by a year or so, and of course not all the features
can be included, because the features are specific to linux or the kernel itself.
WIN32 is a concept project. I essentially took the core parts of JNOS 2.0 and
ported it to native windows. Alot of stuff has not been ported over. This was
basically an experiment to see if it could be done - a demo is available.
Mac OS/X is a port for Mac OS/X (Darwin) on PowerPC machines.