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- Newsgroups: comp.sys.mac.hardware
- Path: sparky!uunet!ferkel.ucsb.edu!taco!gatech!darwin.sura.net!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!relay!paulmac.nswc.navy.mil!user
- From: pmontan@nswc-wo.navy.mil (Paul Montanaro)
- Subject: Re: SPEED and SPEED your IIsi
- Message-ID: <pmontan-101192150035@paulmac.nswc.navy.mil>
- Followup-To: comp.sys.mac.hardware
- Sender: news@relay.nswc.navy.mil
- Organization: NSWC
- References: <1992Nov8.114114.24899@news.Hawaii.Edu>
- Date: Tue, 10 Nov 1992 19:03:32 GMT
- Lines: 29
-
- In article <1992Nov8.114114.24899@news.Hawaii.Edu>,
- guiyu@spectra.eng.hawaii.edu (Kui Yu Chang) wrote:
- >
- > For those who still don't know, I just read something here that says by
- > setting the Disk Cache in Sys7 to 768K, you get faster screen updates on
- > your Macintosh IIsi because all the RAM in Bank A(where the video memory
- > is also allocated)will be used-up.
- >
- > I did an EXPERIMENT immediately and find that the speed-up is IMPRESSIVE!!!
- >
- > All the machines below have similar system configuration, the IIcx uses a
- > standard MacII 8.24 graphics card though.
- >
- > Machine Before After set Cache -> 768K Speed-up
- > ======= ====== ======================= ========
- > Mac IIcx 5.08 secs 5.08 secs N.A.
- > Mac IIsi 8.58 secs 5.08 secs 1.69
- > Mac IIci 4.63 secs 3.66 secs 1.27
- >
- >REST DELETED
-
- Try redoing your test with lots of inits loaded. I think you will find
- that
- in this case having such a high cache setting is not necessary. That's
- because the inits also fill up the RAM in Bank A. On my IIsi with lots of
- inits I found the optimum cache setting to be between 128K - 256K. Also
- according to Speedometer 3.1, setting the cache too high to 768K causes the
-
- disk speed to slow down dramatically.
-