Newsgroups: comp.sys.mac.system
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!think.com!ejb
From: ejb@think.com (Erik Bailey)
Subject: Re: Speeding up IIsi Video
Message-ID: <1991Jun7.204447.5072@Think.COM>
Sender: news@Think.COM
Organization: Thinking Machines Corporation, Cambridge MA, USA
References: <1991Jun7.154243@roy.bellcore.com>
Date: Fri, 7 Jun 91 20:44:47 GMT
Lines: 36

In article <1991Jun7.154243@roy.bellcore.com> rmf5@roy.bellcore.com (Rob Fleischman) writes:
>Does anyone know of a program/cdev/init that protects the portion
>of memory the on board video uses so that way the graphics on the 
>IIsi go FASTER???
>
>It doesn't seem like it would be too hard for a mac-hacker to write.
>Please.. Help us IIsi users with lots of memory but slow video.
>
>		Thanks
>		Robert

Have you been following the discussion about the RAM cache?  It seems
generally accepted that beefing up the cache to 768k results in a definite
speed improvement (for me, 256 colors is as fast as 16 used to be, and 16
is as fast as B&W used to be).

This was all complicated earlier today with the posting (sorry but I forgot
your name!) about how 384k will do the trick nicely, but ONLY with MMInit.
Now, we all know that MMInit is evil, and under System 7 it is (apparently)
a NO-NO.

So... where does this leave us?  I'm not sure.  But try jacking up the
cache to 384, 512, and 768k, and see what happens.  I'd recommend AGAINST
MMInit, but I may be wrong (The number of "Bus Errors" I experienced under
6.0.7 went WAY down after I got rid of it; I have not tried it under Sys 7).

Anyway, that's about all I know.  As I write in nearly every message, it
would be REALLY nice to hear from Mac.IIsi.Designers@Apple.Com! :-) :-)

--Erik

--
      Erik Bailey       | 7 Oak Knoll         | Thinking Machines Corp.
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