on the need for 'virtual memory'

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Article #23396

#23396

From: davidli
Date: Tue, 12 Jan 1993 19:02

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Can someone who knows the history of UNIX please comment on whether the
early versions of UNIX 'required' virtual memory in order to work?  My
own impressions are that the PDP computers didn't have any virtual
memory, and that most programs that were larger than memory consisted of
a series of intelligent overlays.  (My impression is partially formed by
experience with UNIX 7.0 on a PDP-11/34, requiring a grand total of
10 megabytes of hard disk space, and the fact that one of the selling
points of the VAX series of computers was the fact that they had virtual
address space.)

-- DPZ

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From: davidli@simvax.labmed.umn.edu
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Subject: on the need for 'virtual memory'
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Date: 12 Jan 93 19:02:11 GMT
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