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From: Lynn Wheeler <lynn@garlic.com>
Newsgroups: comp.arch
Subject: Re: time-sharing history, Privilege Levels Below User
Date: Wed, 12 Jun 2024 16:13:03 -1000
Organization: Wheeler&Wheeler
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Lawrence D'Oliveiro <ldo@nz.invalid> writes:
> So what did you think of it? The original hardware architecture was 
> heavily centred around the 60.15Hz video refresh. Each refresh interval, 
> 21888 bytes were read out of the video buffer (for the 512×342 display), 
> and 740 bytes were read out of the sound buffer to go to the speaker.

biggest issue was what I characterized as kitchen table "only" with no
business uses ... desktop publishing was somewhat inbetween (visicalc
wasn't supposedly part of it)... at a time when large corporations
ordering tens of thousands of IBM/PC with 3270 terminal emulation
.... single desktop footprint doing both mainframe terminal and
increasing kinds of local processing.

later IBM co-worker left and did some work for Apple using Cray with
100mbyte/sec high-end graphics ... could be used to simulate various
processor and graphic performance ... part of the joke that Cray used
apple to design Cray machines and Apple used Cray machine to design
Apple machines.

some history
https://arstechnica.com/features/2005/12/total-share/
https://arstechnica.com/features/2005/12/total-share.ars/2
https://arstechnica.com/features/2005/12/total-share.ars/3
https://arstechnica.com/features/2005/12/total-share.ars/4
https://arstechnica.com/features/2005/12/total-share.ars/5
https://arstechnica.com/features/2005/12/total-share.ars/6
https://arstechnica.com/features/2005/12/total-share.ars/7
https://arstechnica.com/features/2005/12/total-share.ars/8
https://arstechnica.com/features/2005/12/total-share.ars/9
https://arstechnica.com/features/2005/12/total-share.ars/10

-- 
virtualization experience starting Jan1968, online at home since Mar1970