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From: patwood@unirot.UUCP.UUCP
Newsgroups: comp.laser-printers
Subject: Re: Is there any way to clear VM in LaserWriter?
Message-ID: <8709211642.AA13969@brillig.umd.edu>
Date: Sun, 13-Sep-87 01:53:09 EDT
Article-I.D.: brillig.8709211642.AA13969
Posted: Sun Sep 13 01:53:09 1987
Date-Received: Sat, 26-Sep-87 14:33:58 EDT
References: <4985@jade.BERKELEY.EDU>
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: unirot!patwood@RUTGERS.EDU (Patrick Wood)
Distribution: world
Organization: Pipeline Associates, Inc.
Lines: 32
Keywords: Apple LaserWriter, virtual memory, reset
Approved: laser-lovers@brillig.umd.edu

Here's how you can "manage" your permanent VM:

First you put the following at the beginning of whatever it is you want
to "pop" at a later time:

serverdict begin 0 exitserver
/$$SAVESERVER save def

anything you want here...

CTRL-D

Now to "pop" what you've put into VM above, just do this:

serverdict begin 0 exitserver
$$SAVESERVER restore
CTRL-D

All the information loaded in after the previous save is tossed, recovering
your VM.  This is essentially what the job server does (perform a save and
restore) around a user's job.

Note that you should NOT do the $$SAVESERVER restore except after the
exitserver operation, as the interpreter will get quite confused when
the current job ends (and it can't find the save object it stored when
the job started) and will restart itself, doing just what you don't want
it to do.

Pat Wood
Editor, The PostScript Language Journal
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