Re: Virtual memory init

Article View: comp.sys.mac

Article #36500

#36500

From: William M. Bumgarner
Date: Thu, 19 Jan 1989 04:44

23 lines
1610 bytes

Even when real memory comes down in price, there will still be a place for
the virtual memory INIT>..

System 7.0 should be able to deal with 32bit addressing, meaning that the
effective limit of memory becomes 1 gigabyte.  Currently the INIT can only
deal with up to an 8Meg swap space because of the system software, not
itself.

It will be a long time before the price of 4 meg SIMMS (for a 16 meg Mac II)
will be as inexpensive as simply setting the INIT to a 16 meg swap space...
and if you need more memory, clear a little more space on the hard drive.
One might think that no one will ever need that much memory-- wrong.  Have you
ever tried to process a good-sized image in ImageStudio@300 DPI?  w/undo
enabled?  can take way more than 8 megs-- an 8X10 image at 300 DPI w/undo takes
a little over 14 megabytes of RAM.  Using the virtual memory INIT not only
gives you the ability to attempt processing images that large, but to be able
to do it under MultiFinder!

Other applications need loads of memory, or at least would be happy w/a lot
more than allocated to them; HyperCard, FullWrite Professional, MacNet....

b.bum
wb1j+@andrew.mcu.edu

Technical Details

Message-ID: <QXpKSoy00WA4A1dmZB@andrew.cmu.edu>

Path:

arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!ncis.llnl.gov!ncis!helios.ee.lbl.gov!pasteur!agate!labrea!decwrl!purdue!mailrus!csd4.milw.wisc.edu!bbn!rochester!pt.cs.cmu.edu!andrew.cmu.edu!wb1j+

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!ncis.llnl.gov!ncis!helios.ee.lbl.gov!pasteur!agate!labrea!decwrl!purdue!mailrus!csd4.milw.wisc.edu!bbn!rochester!pt.cs.cmu.edu!andrew.cmu.edu!wb1j+
From: wb1j+@andrew.cmu.edu (William M. Bumgarner)
Newsgroups: comp.sys.mac
Subject: Re: Virtual memory init
Message-ID: <QXpKSoy00WA4A1dmZB@andrew.cmu.edu>
Date: 19 Jan 89 04:44:36 GMT
Organization: Carnegie Mellon, Pittsburgh, PA
Lines: 23