Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!lll-winken!uunet!mcsun!hp4nl!star.cs.vu.nl!ast From: ast@cs.vu.nl (Andy Tanenbaum) Newsgroups: comp.os.misc Subject: Re: (Free) book on the Amoeba distributed system available Message-ID: <9310@star.cs.vu.nl> Date: 14 Mar 91 22:03:38 GMT References: Sender: news@cs.vu.nl Organization: Fac. Wiskunde & Informatica, VU, Amsterdam Lines: 16 In article mib@churchy.ai.mit.edu (Michael I Bushnell) writes: >Mach 2.5 requires the licenses of which you speak. The Mach 3.0 micro >kernel on the Pmax and the 386 is, indeed free. The single server >which many people run on top of it requires other people's licenses. Assuming one does not have any third-party source licenses, what precisely can one do with the Mach 3.0 microkernel? Is there a PD UNIX emulation that runs on top of it? Other things? A freestanding microkernel without anything else is of somewhat limited value, isn't it? The only solution we have been able to think of is write a bunch of servers ourselves, but this has taken a huge amount of work. I don't understand how Mach has solved it. If there is a magic bullet, I'm quite keen on hearing about it. Andy Tanenbaum P.S. Rick & I have gone private. We keep all the juicy stuff to ourselves.