Date: Mon, 08 Sep 1997 13:30:37 -0400 From: "Kevin P. Neal" <kpneal@pobox.com> To: hcremean@vt.edu Cc: hackers@FreeBSD.ORG, chat@FreeBSD.ORG Subject: Re: Divert sockets.. Message-ID: <1.5.4.32.19970908173037.00e11ea0@mail.mindspring.com>
next in thread | raw e-mail | index | archive | help
At 03:56 AM 9/8/97 -0400, Lee Cremeans wrote: > >[crossposted to -chat] > >On Mon, Sep 08, 1997 at 08:19:13AM +0100, Josef Karthauser wrote: >> On Mon, Sep 08, 1997 at 10:22:23AM +0930, Daniel J. O'Connor wrote: >> > > to get messages to and from the kernel? >> > Yeah, the Amiga had the 'advantage' of having no memory protection(at >> > all), so you could just pass pointers around =) >> >> That's not entirely true. Is it? The 4000 had memory protection and the >> same O/S. (a500 ran 68000, a4000 ran 68030/40). > >Well, the 68000 had user and supervisor modes, but no page-level protection >like the 030 and above (and the 68020 with the 68851 MMU)--and most other >processors with demand paging--do. Exactly correct. The '020+MMU and up machines were able to do memory protection, but it was never built into the Amiga OS. -- XCOMM Kevin P. Neal, Junior, Comp. Sci. - House of Retrocomputing XCOMM mailto:kpneal@pobox.com - http://www.pobox.com/~kpn/ XCOMM kpneal@eos.ncsu.edu Spoken by Keir Finlow-Bates: XCOMM "Good grief, I've just noticed I've typed in a rant. Sorry chaps!"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1.5.4.32.19970908173037.00e11ea0>