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From: "Michael Kjörling" <michael@kjorling.se>
To: tuhs@minnie.tuhs.org
Subject: Re: [TUHS] Photos of University Computer Labs
Date: Thu, 23 Dec 2021 13:05:55 +0000	[thread overview]
Message-ID: <dd67a840-461f-4941-b93c-4e5e661fd8c0@localhost> (raw)
In-Reply-To: <20211223021805.GK24180@mcvoy.com>

On 22 Dec 2021 18:18 -0800, from lm@mcvoy.com (Larry McVoy):
> The CP/M machines bring back different memories, using that and BDS
> C because an 11/780 with 4MB of ram and 40 users meant each user was
> getting 1KB so it swapped and swapped and swapped.

4 MB RAM and 40 users works out to 100 KB of RAM per user for me. Even
accounting for a large at the time OS it should be several tens of
kilobytes per user on average for actual useful data. So, because
there's probably some detail here that means you're right and I'm
wrong, how do you arrive at the figure 1 KB of RAM per user in that
scenario?

-- 
Michael Kjörling • https://michael.kjorling.se • michael@kjorling.se
 “Remember when, on the Internet, nobody cared that you were a dog?”


  reply	other threads:[~2021-12-23 13:06 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-22 15:11 Alexander Jacocks via TUHS
2021-12-22 20:31 ` josh
2021-12-22 21:07   ` Rob Pike
2021-12-22 21:15     ` Rob Pike
2021-12-23  4:28       ` Warren Toomey
2021-12-23  4:31         ` Alexander Jacocks via TUHS
2021-12-23  4:45         ` Rob Pike
2021-12-22 21:14 ` Win Treese
2021-12-23  0:48   ` Adam Thornton
2021-12-23  1:30 ` Adam Sampson
2021-12-23  2:18   ` Larry McVoy
2021-12-23 13:05     ` Michael Kjörling [this message]
2021-12-23 14:19       ` Larry McVoy
2021-12-23 15:29         ` [TUHS] Photos of University Computer Labs - now off topic Dr Iain Maoileoin
2021-12-23 16:00           ` Larry McVoy
2021-12-23 16:28             ` Dr Iain Maoileoin
2021-12-23 16:35               ` Larry McVoy
2021-12-23 16:47                 ` Dr Iain Maoileoin
2021-12-23 22:15               ` Steve Nickolas
2021-12-24 20:57               ` Derek Fawcus
2021-12-23 16:02           ` Warner Losh
2021-12-23 16:19             ` Larry McVoy
2021-12-23 22:13               ` Steve Nickolas
2021-12-24  3:48                 ` Theodore Ts'o
2021-12-28 21:45                   ` Greg A. Woods
2021-12-29 16:58                     ` Theodore Ts'o
2022-01-09 19:04                 ` Stuart Remphrey
2021-12-25  0:00 ` [TUHS] Photos of University Computer Labs Mike Markowski
2021-12-29  2:44   ` Alexander Jacocks via TUHS

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