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From: melling@cs.psu.edu (Michael D Mellinger)
Newsgroups: comp.sys.amiga.advocacy
Subject: Re: Blitter vs. 040 (was: Computer Architecture question
Message-ID: <0r6Hnxt1@cs.psu.edu>
Date: 11 May 91 20:48:22 GMT
References: <vbcH!4p@cs.psu.edu> <1991May10.180908.29565@convex.com>
	<6o6Hk!=@cs.psu.edu> <1991May11.191434.3615@cunixf.cc.columbia.edu>
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In-Reply-To: es1@cunixb.cc.columbia.edu's message of Sat, 11 May 1991 19:14:34 GMT
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In article <1991May11.191434.3615@cunixf.cc.columbia.edu> es1@cunixb.cc.columbia.edu (Ethan Solomita) writes:

   >The 040 is equal to at least 3 68030's.  

	   Ah, one second here. Motorola is claiming 20 mips for the
   25MHz 040. NeXT claims 15 mips. Well, my A3000 running an 030 is
   doing 7.6. It seems like 2 68030s to me, not at least 3.
   >

Ok, we're playing with different #'s here.  The 030 NeXT was only 5
mips.  Anyway, even if you take an A500 which is less than 1 mip and
the blitter you still get awesome graphics animation.  If the blitter
is approximately equal to an 030, where does the blitter start to lose
its advantage?  On the 40Mhz Mac IIfx, the 10MHz NuBus is suppose to
be a bottleneck.  By the way, I though that the IIfx was only around
an 8 mip machine.  How is Commmodore getting 7.6 out of a 25MHz 030?

So, the question again is a 68040 > 68030 + blitter?  For example, on
a 68040 A3000 is the blitter now the bottle neck?

-Mike