Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!aplcen!haven!udel!gdtltr
From: gdtltr@freezer.it.udel.edu (Gary Duzan)
Newsgroups: comp.sys.atari.8bit
Subject: Re: 6502 error conditions
Message-ID: <31521@nigel.ee.udel.edu>
Date: 25 Sep 90 18:49:48 GMT
References: <30842@nigel.ee.udel.edu> <1990Sep20.175834.10283@cbnewsc.att.com>
Sender: usenet@ee.udel.edu
Organization: Brain Dead Innovations (BDI)
Lines: 36
Nntp-Posting-Host: mocha.it.udel.edu

In article <1990Sep20.175834.10283@cbnewsc.att.com> kimes@cbnewsc.att.com (Kit Kimes) writes:
=>From article <30842@nigel.ee.udel.edu>, by gdtltr@freezer.it.udel.edu (Gary Duzan):
=>> 
=>> =>
=>> =>|"Oh boy, virtual memory! Now I'm gonna make myself a REALLY BIG ram disk!" |
=>> 
=>>    Sounds good to me. The Bullet File System (Amoeba) does something pretty
=>> close to this. It seems to be getting more popular.
=>
=>I have never heard of the Bullet File System.  Where can I get a copy.  Is
=>it sold by Atari dealers.  I don't think my local one has heard of it
=>either.  At least it has never been brought up at any of our User Group
=>meetings.
=>
   I guess that's what I get for replying to someone's signature. The BFS
has nothing whatsoever to do with Atari. In fact, it would be impossible to
implement without virtual memor and at least 24 bit virtual addresses. You
just don't get that sort of thing with a 6502 (though it would be neat to
implement it on a 65816 (Turbo-816, IIgs.))
   The BFS was created for the Amoeba Distributed Operating System at the
Free University in Amsterdam, The Netherlands. It essentially maps entire
files into a virtual memory page table when they are opened. The file
system accesses the file's page table to read the file. I haven't gotten
to read up on the specifics, but that is basically the idea.

                                        Gary Duzan
                                        Time  Lord
                                    Third Regeneration



-- 
                          gdtltr@freezer.it.udel.edu
   _o_                    --------------------------                      _o_
 [|o o|]        An isolated computer is a terribly lonely thing.        [|o o|]
  |_O_|         "Don't listen to me; I never do." -- Doctor Who          |_O_|