Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!dftsrv!mimsy!tove.umd.edu!folta
From: folta@tove.umd.edu (Wayne Folta)
Newsgroups: comp.sys.mac.hardware
Subject: Re: IIci + 8Mb != more speed
Summary: Forgot to mention MultiFinder
Message-ID: <22513@mimsy.umd.edu>
Date: 14 Feb 90 02:10:03 GMT
References: <22499@mimsy.umd.edu> <25d88b45.2cea@polyslo.CalPoly.EDU>
Sender: news@mimsy.umd.edu
Reply-To: folta@tove.umd.edu (Wayne Folta)
Distribution: usa
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 21

>By running your programs IN bank B memory, your avoid contention with
>the video.  The processor runs from bank B and the video from bank A.
>However, the Mac still loads programs into RAM from the bottom upward.
>Thus, on an 8 meg machine, your program is probably still running in
>the lower 4 meg (i.e., bank A).  If you can get it to run in bank B,
>then you should see a speedup.  This is also why 5meg is such an
>attractive configuration for the IIci.  1meg in bank A is usually
>used up by the video and system leaving only the 4 meg in bank B for
>running programs.

I forgot to mention that I was running under MultiFinder in System 6.0.4.
I have heard it claimed that MultiFinder will automatically run stuff as
high in memory as possible, so I assumed that I was in Bank B.  I also
shrunk LISP's memory down to 1500Kb before I ran it, guaranteeing it
didn't wrap around into Bank A.

Maybe an INIT is causing problems?  I'll have to investigate further...
--


Wayne Folta          (folta@cs.umd.edu  128.8.128.8)