What it's based on is is the OS3.1 sourcecode and whatever OS3.9 sourecode Amiga managed to scrap together for Hyperion..
I wonder how much 3.5/3.9 code they did manage to re-use given all the legal issues with H&P; I know that Amidock is a completely new application, for example, but I'm guessing they somehow managed to get the code for things like ReAction...
