Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!cs.utexas.edu!swrinde!dfsun1!fenske
From: fenske@dfsun1.electro.swri.edu (Robert Fenske Jr)
Newsgroups: comp.sys.amiga
Subject: Re:  Lies, lies, they're telling us lies...
Keywords: page,zero,386
Message-ID: <1469@dfsun1.electro.swri.edu>
Date: 1 Dec 89 23:07:09 GMT
References: <5003@nigel.udel.EDU> <4385@eagle.wesleyan.edu>
Reply-To: fenske@dfsun1.UUCP (Robert Fenske Jr)
Organization: Southwest Research Institute, San Antonio, Texas
Lines: 23

In article <4385@eagle.wesleyan.edu> you write:
>In article <5003@nigel.udel.EDU>, acm131@eric.ccs.northeastern.edu (Craig Scott Lennox) writes:
>> In Message-Id: <544@xdos.UUCP> Doug Merritt <doug@xdos.CCS.Northeastern.EDU>
>> writes:
>> of copying the entire contents of page zero, out and in, etc. etc.  Of
       ^
       ^
Does ANY OS do this sort of thing now days?  I thought this stuff went out
with the '70's.
>
>However, doesn't the '386 fix the 64k chunk problem (in virtual mode)? I think
>it has something like 2^32 bit chunks instead of 2^16 bit chunks.
>
Yes, in protected mode the '386 has 32-bit offsets; coupled with the 16-bit
selectors makes for a 64TB virtual address space (should be enough for the
'90's :-) ).  I believe it also has a flat space mechanism where all the
selectors are effectively 0, giving a more normal 4GB address space.

-- 
Robert Fenske, Jr.                      Sw     | The Taming the C*sm*s series:
Electromagnetics Division              /R---\  |
Southwest Research Institute          | I    | | "The Martian canals were the
dfsun1.electro.swri.edu 129.162.160.4  \----/  |  Martian's last ditch effort."