What's a good resource going over the architecture of Windows 3.x and 9x? I know bits and pieces, like that it has a "VM Monitor", and there's support for this sort of thing, though the details are all over the place. Most people summarized Windows as just "running on top of DOS", which is clearly not correct. Obviously, it doesn't use "virtual machines" in exactly the modern sense of the word, but there's clearly something cool and technical going on, that most sources seem to gloss over.
I wonder how similar this project is to "BSD on Windows": https://archive.org/details/bsd-on-windows
Also, I know about https://en.wikipedia.org/wiki/Architecture_of_Windows_9x, but it's not really meaty enough for my taste. :)