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From: mitchalsup@aol.com (MitchAlsup1)
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Subject: Re: interative use, The Design of Design
Date: Tue, 7 May 2024 20:51:25 +0000
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John Levine wrote:

> According to Stephen Fuld <SFuld@alumni.cmu.edu.invalid>:
>>

> This paper from U of Michigan lays out the problem and proposes a
> paging design which soon became the 360/67:

> https://dl.acm.org/doi/pdf/10.1145/321312.321313

> TSS was a disaster due to an extreme case of second system syndrome,
> but Michigan's MTS and IBM skunkworks CP/67 worked great.

TSS at CMU was extensively rewritten in assembly and became quite
tolerable--hosting 30+ interactive jobs along with a background
batch processing system. When I arrived in Sept 1975 it was quite 
unstable with up times less than 1 hour. 2 years later it would run
for weeks at a time without going down.

As I understand it* most of the changes were simply getting rid of
things that were not present on CMU's 360/67.

(*) was told by someone who should have known circa 1974 who also
worked in the machine room 3rd floor in what became Scaife hall.