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

From	John Levine <johnl@taugh.com>
Newsgroups	comp.os.linux.misc, alt.folklore.computers
Subject	Re: slow computers, Hmmm ... Downloaded Xenix - But It's 41 Floppies Worth
Date	2025-09-06 23:00 +0000
Organization	Taughannock Networks
Message-ID	<109iee0$22qi$1@gal.iecc.com> (permalink)
References	<e4ucnb1I-5IIqur1nZ2dnZfqnPudnZ2d@giganews.com> <109ibrg$3a10s$1@dont-email.me> <109id72$1nq0$1@gal.iecc.com> <109idk1$3aekh$1@dont-email.me>

Cross-posted to 2 groups.

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According to geodandw  <geodandw@gmail.com>:
>> It normally only came with a multiplexor channel, which a disk or tape captured
>> for the length of the operation so it couldn't do disk or tape I/O and any other
>> I/O at the same time unless you paid extra for a selector channel.
>> 
>> You could run OS on a 64K /30, but only single threaded PCP, not MFT or MVT.
>I worked where we had a 360/30 with 96K with DOS. We ran BG plus a 
>spooler in FG.

The most IBM offered on a /30 was 64K, but I have heard of aftermarket vendors that
managed to activate another address line or two and put on more memory.  If your
employer did that, they probably also got the extra cost selector channel that let
the disk run in parallel with other stuff.

So I believe you, but that was a fairly unsuual and very large configuration for a /30.



-- 
Regards,
John Levine, johnl@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly

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Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Theo <theom+news@chiark.greenend.org.uk> - 2025-09-03 11:10 +0100
  Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth The Natural Philosopher <tnp@invalid.invalid> - 2025-09-03 11:55 +0100
  Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth antispam@fricas.org (Waldek Hebisch) - 2025-09-03 14:13 +0000
    Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-03 23:11 +0000
    Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Alexander Schreiber <als@usenet.thangorodrim.de> - 2025-09-04 10:10 +0200
    Re: slow computers, Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth John Levine <johnl@taugh.com> - 2025-09-06 17:38 +0000
      Re: slow computers, Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Peter Flass <Peter@Iron-Spring.com> - 2025-09-06 15:16 -0700
        Re: slow computers, Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth John Levine <johnl@taugh.com> - 2025-09-06 22:39 +0000
          Re: slow computers, Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth geodandw <geodandw@gmail.com> - 2025-09-06 18:46 -0400
            Re: slow computers, Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth John Levine <johnl@taugh.com> - 2025-09-06 23:00 +0000
              Re: slow computers, Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth geodandw <geodandw@gmail.com> - 2025-09-07 15:57 -0400
          Re: slow computers, Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth geodandw <geodandw@gmail.com> - 2025-09-06 18:48 -0400
          Re: slow computers, Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth c186282 <c186282@nnada.net> - 2025-09-07 04:11 -0400
          Re: slow computers, Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Dan Espen <dan1espen@gmail.com> - 2025-09-07 14:43 -0400
            Re: slow computers, Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Peter Flass <Peter@Iron-Spring.com> - 2025-09-08 08:10 -0700
  Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-03 23:09 +0000
    Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth John Ames <commodorejohn@gmail.com> - 2025-09-04 07:48 -0700
      Re: Hmmm ... Downloaded Xenix - But It's *41* Floppies Worth Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-09-04 20:51 +0000

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