Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site greipa.UUCP Path: utzoo!watmath!clyde!burl!ulysses!ucbvax!decvax!decwrl!greipa!paul From: paul@greipa.UUCP (Paul A. Vixie) Newsgroups: net.arch Subject: Re: Sparse addressing info wanted Message-ID: <271@greipa.UUCP> Date: Mon, 8-Jul-85 20:27:54 EDT Article-I.D.: greipa.271 Posted: Mon Jul 8 20:27:54 1985 Date-Received: Thu, 11-Jul-85 07:45:55 EDT References: <306@cstvax.UUCP> <353@scgvaxd.UUCP> Reply-To: paul@greipa.UUCP (Paul A. Vixie) Organization: Genstar Rental Electronics, Palo Alto, Ca. Lines: 13 I think when he said "vaxes don't have sparse addressing" he was alluding to the 30-bit addresses. The top 2 bits of VAX/VMS memory addresses denote "P0" or "P1" space; addresses above 0x80000000 cannot be mapped into without some special priviledge and then *very carefully* lest you map out your SYS$------ vectors. Just thought I'd clear that up. Except for this error, the VAX would be as nice to write code for as a NS32000. -- Paul Vixie {decwrl dual pyramid}!greipa!paul