Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site umcp-cs.UUCP Path: utzoo!watmath!clyde!bonnie!akgua!whuxlm!harpo!decvax!genrad!mit-eddie!think!harvard!seismo!umcp-cs!chris From: chris@umcp-cs.UUCP (Chris Torek) Newsgroups: net.arch Subject: Re: Sparse addressing info wanted Message-ID: <796@umcp-cs.UUCP> Date: Wed, 10-Jul-85 12:57:32 EDT Article-I.D.: umcp-cs.796 Posted: Wed Jul 10 12:57:32 1985 Date-Received: Mon, 15-Jul-85 06:36:53 EDT References: <306@cstvax.UUCP> <353@scgvaxd.UUCP> <271@greipa.UUCP> Organization: U of Maryland, Computer Science Dept., College Park, MD Lines: 11 Actually, I think you're both wrong about what he meant (isn't this fun? :-) ). The Vax can do sparse addressing, but it takes a lot of page table entries to do it in system space since there is only a single level lookup. However, no ordinary programs should really want to fiddle with system space maps anyway, so just think of a Vax as a 2GB virtual machine, rather than a 4GB machine, and you'll be OK. -- In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 4251) UUCP: seismo!umcp-cs!chris CSNet: chris@umcp-cs ARPA: chris@maryland