Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!asuvax!ncar!elroy.jpl.nasa.gov!swrinde!zaphod.mps.ohio-state.edu!think.com!news
From: ejb@think (Erik Bailey)
Newsgroups: comp.sys.mac.system
Subject: Some System 7 questions...
Keywords: mac system 7
Message-ID: <1991May31.151901.10137@Think.COM>
Date: 31 May 91 15:19:01 GMT
Sender: ejb@think.com
Organization: Thinking Machines Corporation, Cambridge MA, USA
Lines: 32


[hey! what ever happened to the line ea...]

I've got a few questions about System 7.  I'm running it on a Mac IIsi
5/80, and so far so good (except for a few crash & burn situations where
not even Cmd-Opt-Esc could help [oh for a protected environment!] and the
slowness [esp TrueType - much slower than under 6.0.7]).

Here's what I'm wondering . . .

1) What kind of overhead does VM involve?  That is, if I'm running an
   application that would normally fit entirely in PHYSICAL memory, what
   performance loss (if any) do I experience by using VM (I'm set up with
   10M VM now, and it seems to be quite transparent)?

2) The same question for 32-bit addressing... Assuming an application
   supports it and doesn't crash, is 32-bit slower/faster/the-same-as
   24-bit?  Is there any reason to use 32-bit addressing with the small
   amount of memory I have?

3) Why won't the system use the pretty floppy disk icon when I'm in 8-bit
   mode?  It persists in using the 1-bit icon.  Incidentally, for you IIsi
   owners out there, I *highly* recommend the tip circulation about setting
   the RAM cache to 768k -- it at least doubles video performance!

That's it for now.  adTHANKSvance for any help! --Erik

--
      Erik Bailey       | 7 Oak Knoll         | Thinking Machines Corp.
      ejb@think.com     | Arlington, MA 02174 | 245 First St.
      harvard!think!ejb | (617) 643-0732      | Cambridge, MA  02142
          /earth is 98% full. Please remove any excess inhabitants.