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From: "Stephen Fuld" <SFuld@alumni.cmu.edu.invalid>
Newsgroups: comp.arch
Subject: Re: ancient OS history, ARM is sort of channeling the IBM 360
Date: Sun, 30 Jun 2024 17:51:01 -0000 (UTC)
Organization: A noiseless patient Spider
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References: <v5s173$jl70$1@dont-email.me> <memo.20240630183839.956d@jgd.cix.co.uk>
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John Dallman wrote:

> In article <v5s173$jl70$1@dont-email.me>, SFuld@alumni.cmu.edu.invalid
> (Stephen Fuld) wrote:
> 
> > John Dallman wrote:
> 
> > > Virtual memory was pretty new technology at the time, and 
> > > required a disk or drum. The central idea of /360 was having 
> > > the same ISA across a wide range of machines, and virtual 
> > > memory wasn't affordable at the low end at the time, AFAICS. 
> > 
> > But IIRC even low end S/360s required a disk, at least to IPL(boot)
> > from. 
> 
> Are you sure? Per Wikipedia, the lowest-end real S/360, the Model 30,
> could run with only card equipment, running BPS, or with only tape
> drives, under TOS. 
> 
>
<https://en.wikipedia.org/wiki/IBM_System/360_Model_30#System_software>


You, and John are right.  I got that wrong and apologize for doing so.




-- 
 - Stephen Fuld 
(e-mail address disguised to prevent spam)