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.minix Subject: Re: Relationship of unix, mach, minix, amoeba? Message-ID: <9336@star.cs.vu.nl> Date: 17 Mar 91 00:21:15 GMT References: <9334@star.cs.vu.nl> Sender: news@cs.vu.nl Distribution: comp Organization: Fac. Wiskunde & Informatica, VU, Amsterdam Lines: 30 In article <9334@star.cs.vu.nl> jms@cs.vu.nl (Jan-Mark Wams) writes: >Well I hope all this is correct; Hope springs eternal, but not today. > > UNIX comes in a lot of variants. (Like BSDx.y V7 etc.) True > MACH is build on top of UNIX, supporting extra thingys like RPC. Not true. > MINIX is for small machines but should be V7 compatible with > the restriktions your XT, AT, ST, (etc.) has. ??? > AMOEBA is a RPC based operating system, it needs a lot of > machines. There is a UNIX simulator for AMOEBA. There is a partial UNIX emulation library. > About UNIX sources you will have to buy them separaty in most > if not all cases. For about $150,000 unless you are a university. > The MACH sources can only be used with AT&T UNIX source code. Well, the MACH 3.0 microkernel is free of AT&T, but a freestanding microkernel without anything else is of limited value, so in practice you need BSD and AT&T licenses to do anything useful. > MINIX sources are cheap and one is allowed limited copying. > AMOEBA comes with sources to, but it's huge! Compared to what? To MINIX yes. To UNIX, no. Andy Tanenbaum (ast@cs.vu.nl)