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From: Woozy Song <suzyw0ng@outlook.com>
Newsgroups: comp.os.linux.misc
Subject: Re: Thoughts on IBM 360
Date: Sat, 5 Apr 2025 08:47:23 +0800
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The Natural Philosopher wrote:
> "The 1967 IBM System/360 Model 91 could execute up to 16.6 million 
> instructions per second. The larger 360 models could have up to 8 MB of 
> main memory though that much memory was unusual; a large installation 
> might have as little as 256 KB of main storage, but 512 KB, 768 KB or 
> 1024 KB was more common. Up to 8 megabytes of slower (8 microsecond) 
> Large Capacity Storage (LCS) was also available for some models. "
> 
>

I have some Fortran code written on an IBM 360. Due to the 8 MB memory 
limit, it more or less used one big array, and did it's own memory 
management by recycling the indexes IX,IY,IZ et cetera. Bloody nightmare 
to debug.