Xref: utzoo comp.unix.questions:10552 comp.os.misc:695 Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!think!barmar From: barmar@think.COM (Barry Margolin) Newsgroups: comp.unix.questions,comp.os.misc Subject: Re: Does anyone still use Multics?? Message-ID: <33003@think.UUCP> Date: 7 Dec 88 00:41:48 GMT References: <6392@polyslo.CalPoly.EDU> <281@cs-spool.calgary.UUCP>Sender: news@think.UUCP Reply-To: barmar@kulla.think.com.UUCP (Barry Margolin) Distribution: na Organization: Thinking Machines Corporation, Cambridge MA, USA Lines: 22 In article webber@athos.rutgers.edu (Bob Webber) writes: >Is there anything one should be aware of that isn't presented in the >Organick book? I don't recall how much the book talks about details of the file system implementation, but it was extensively revised in the early 70's. Additionally, at the time the book was written, the ring security facility was implemented primarily in software (resulting in many unavoidable security holes), and it was later moved into the hardware; all the stuff in the book about the gatekeeper routine is obsolete. Most of the rest of the book is still pretty accurate. The dynamic linker and the the memory mapped file system haven't changed much. Peripheral I/O has been improved quite a bit, but I doubt that the book goes into that much. Barry Margolin Thinking Machines Corp. barmar@think.com {uunet,harvard}!think!barmar