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From: mitchalsup@aol.com (MitchAlsup1)
Newsgroups: comp.arch
Subject: Re: Address bits again, Article on new mainframe use
Date: Mon, 9 Sep 2024 16:55:44 +0000
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On Mon, 9 Sep 2024 6:53:20 +0000, Lawrence D'Oliveiro wrote:

> On Sun, 8 Sep 2024 00:45:05 +0000, MitchAlsup1 wrote:
>
>> On Sat, 7 Sep 2024 23:45:10 +0000, Lawrence D'Oliveiro wrote:
>>
>>> On Thu, 5 Sep 2024 14:59:20 -0000 (UTC), John Levine wrote:
>>>
>>>> What I really wanted was relocatable segments I could load on demand
>>>> or paging, but that was a lot to ask of an 8088 or a real mode 286.
>>>
>>> The Burroughs machines had swappable segments, I gather. So the
>>> difference between segmentation and paging came down to: the address
>>> space is still linear, but segments are variable-length, and pages are
>>> fixed-length.
>>>
>>> It was soon generally agreed that fixed-length pages were easier to
>>> deal with.
>>
>> Largely because you could swap out part of a segment.
>
> I’m assuming you meant “couldn’t” ...

With pages you can swap parts of a segment (page at a time)
with segmentation (only) you cannot swap parts of the segment.