Xref: news-dnh.mv.net comp.os.msdos.djgpp:374
Path: news-dnh.mv.net!mv!news.sprintlink.net!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!ncar!newshost.lanl.gov!newshost!egdorf
From: egdorf AT zaphod DOT lanl DOT gov (Skip Egdorf)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Mapping files to memory?
Date: 13 Jun 1995 16:48:02 GMT
Organization: Los Alamos National Laboratory
Lines: 15
References: <DA45p3 DOT CMy AT jade DOT mv DOT net>
Nntp-Posting-Host: zaphod.lanl.gov
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Dj-Gateway: from newsgroup comp.os.msdos.djgpp

In article <DA45p3 DOT CMy AT jade DOT mv DOT net> kagel AT quasar DOT bloomberg DOT com writes:

   For those not familiar with memory mapped I/O: I believe the facility first
   appeared on DEC10 and DEC20 systems under TOPS10/20.

Ahhh, the nit-pick of the day. This was (as with so much in so many
systems) inspired by Multics, where memory mapping was the
norm. Segments (files on multics) were just parts of your virtual
memory that could be made visible by mapping them. Lots of systems
have lifted memory mapping because it is such a "right thing" for so
many problems.  Multics just did it in a more complete way because it
was a basic concept from the beginning.

					Skip Egdorf
					hwe AT lanl DOT gov