otto at drijf.net
Tue Jun 13 06:03:43 UTC 2006
On Mon, 12 Jun 2006, Ted Mittelstaedt wrote:
> >-----Original Message-----
> >From: John Nemeth [mailto:jnemeth at victoria.tc.ca]
> >Sent: Monday, June 12, 2006 1:15 PM
> >To: Ted Mittelstaedt; Nikolas Britton; Ted Unangst
> >Cc: Hamorszky Balazs; misc at openbsd.org; freebsd-questions at freebsd.org;
> >netbsd-users at NetBSD.org
> >Subject: RE: wikipedia article
> >On Nov 1, 6:11pm, "Ted Mittelstaedt" wrote:
> >} Prior to the release of the 80386 the Intel processors didn't have
> >} memory protection which was a requirement of any processor running
> >} the BSD kernel.
> > This is not entirely true. The 80286 had memory protection.
> >However, its memory protection was completely based on segments (i.e.
> >it could not do paging).
> Oh, yeah, your right about that. Me bad.
> >Also, it was only a 16 bit processor.
> What was the bit size of the CPU's originally used to write UNIX in Bell
What's more, iirc the MMU of the pdp11 isn't what we call a MMU today,
it could not even do paging.
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