Re: Hmmm ... Downloaded Xenix - But It's 41 Floppies Worth

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From	John Ames <commodorejohn@gmail.com>
Newsgroups	comp.os.linux.misc, alt.folklore.computers
Subject	Re: Hmmm ... Downloaded Xenix - But It's 41 Floppies Worth
Date	Mon, 21 Jul 2025 09:32:37 -0700
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On Sat, 19 Jul 2025 07:14:12 -0000 (UTC)
Lawrence D'Oliveiro <ldo@nz.invalid> wrote:

> > For sure it's a really limited Unix port since the target HW is the
> > original PC or PC/XT.  
> 
> Which is still way more powerful than an early-1970s-vintage PDP-11,
> which is what Bell Labs Unix was originally developed on, and for.

Hmm, that's an interesting question, actually - the Bell Labs -11 was
an 11/45, which was much faster than the original -11s, while the IBM
PC was really a bit of a dog thanks to having a 16-bit architecture on
an 8-bit bus and the generally poor performance characteristics of the
first-generation x86 CPUs. It'd be neat to do a head-to-head shootout.
I don't know if it's recorded whether the Bell Labs -11 was core or
semiconductor memory (980 vs. 450 ns cycle time;) the PC at 4.77 MHz
would have a cycle time of around 209 ns, but with the aforementioned
8-bit bus. As a naive approximation, that might put them anywhere from
comparable to around twice the memory bandwidth for the PC...but then
the 8088's instruction times are kinda abysmal even on top of that.
Definitely makes one curious...

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Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth c186282 <c186282@nnada.net> - 2025-07-16 01:24 -0400
  Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2025-07-16 15:53 +0000
  Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth jayjwa <jayjwa@atr2.ath.cx.invalid> - 2025-07-16 12:41 -0400
  Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth rbowman <bowman@montana.com> - 2025-07-16 17:32 +0000
    Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Rich <rich@example.invalid> - 2025-07-16 17:54 +0000
      Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth rbowman <bowman@montana.com> - 2025-07-16 20:11 +0000
    Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth c186282 <c186282@nnada.net> - 2025-07-17 03:44 -0400
      Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Anssi Saari <anssi.saari@usenet.mail.kapsi.fi> - 2025-07-19 09:48 +0300
        Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-07-19 07:14 +0000
          Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2025-07-19 17:49 +0000
          Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth John Ames <commodorejohn@gmail.com> - 2025-07-21 09:32 -0700
            Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth scott@slp53.sl.home (Scott Lurndal) - 2025-07-21 17:08 +0000
              Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Peter Flass <Peter@Iron-Spring.com> - 2025-07-21 16:04 -0700
                Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-07-21 23:06 +0000
                Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth scott@slp53.sl.home (Scott Lurndal) - 2025-07-22 14:46 +0000
            Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Rich Alderson <news@alderson.users.panix.com> - 2025-07-21 16:07 -0400
            Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Bob Eager <news0009@eager.cx> - 2025-07-21 21:16 +0000
              Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth The Natural Philosopher <tnp@invalid.invalid> - 2025-07-21 22:27 +0100
                Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-07-21 22:42 +0000
                Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Peter Flass <Peter@Iron-Spring.com> - 2025-07-21 16:06 -0700
                Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth The Natural Philosopher <tnp@invalid.invalid> - 2025-07-22 10:08 +0100
                Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-07-22 22:16 +0000
                Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Lars Poulsen <lars@cleo.beagle-ears.com> - 2025-07-22 19:19 +0000
              Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth scott@slp53.sl.home (Scott Lurndal) - 2025-07-22 14:44 +0000
                Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Bob Eager <news0009@eager.cx> - 2025-07-22 20:55 +0000
                Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth scott@slp53.sl.home (Scott Lurndal) - 2025-07-22 21:08 +0000
                Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Bob Eager <news0009@eager.cx> - 2025-07-22 22:29 +0000
                Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth scott@slp53.sl.home (Scott Lurndal) - 2025-07-23 18:48 +0000
          Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Rich Alderson <news@alderson.users.panix.com> - 2025-07-21 16:05 -0400
  Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Adrian Caspersz <email@here.invalid> - 2025-07-19 11:41 +0100

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