Path: csiph.com!eternal-september.org!feeder.eternal-september.org!.POSTED!not-for-mail From: John Ames Newsgroups: comp.os.linux.misc,alt.folklore.computers Subject: Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Date: Tue, 26 Aug 2025 10:01:26 -0700 Organization: A noiseless patient Spider Lines: 17 Message-ID: <20250826100126.00000d21@gmail.com> References: <105fgk4$2ka5f$1@dont-email.me> <20250721093237.0000674f@gmail.com> <108k7rn$e12$4@news.misty.com> <20250826083118.00001403@gmail.com> <20250826175241.3e53fac53d3f520742b5226b@127.0.0.1> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Injection-Date: Tue, 26 Aug 2025 17:01:30 +0000 (UTC) Injection-Info: dont-email.me; posting-host="ab53ce3caedf19d5de64bb963a03bc54"; logging-data="147528"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19xmLCyn4UFpIxc7bPZPBnKWjp9F0xM3bA=" Cancel-Lock: sha1:4jPMgwtvHlh9xR+DPR6J5QJYBhg= X-Newsreader: Claws Mail 4.3.0 (GTK 3.24.42; x86_64-w64-mingw32) Xref: csiph.com comp.os.linux.misc:72314 alt.folklore.computers:231620 On Tue, 26 Aug 2025 17:52:41 +0100 "Kerr-Mudd, John" wrote: > > The 286 had a proper MMU, but not (AFAIUI) a terribly performant > > one. I've never heard of an add-on MMU for the 8086, but I admit > > I've never looked. In any case, I realize now that my napkin math > > was way off; the 8086/88 can only perform a memory access every > > fourth cycle, so the PC's approximate "cycle time" by comparison > > would be more like ~836 ns, barely faster than core even *before* > > you factor in the 8-bit bottle- neck or DRAM refresh. Ye gods, what > > a *dog.* > > Sure, but the idea was you had it *all to yourself* > /Mwhah-hah-hah-hah!/ Sorry, I don't know what came over me there. Admittedly.