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From: murphyd@csuchico.edu (Dave Murphy)
Newsgroups: comp.sys.amiga
Subject: Re: A3000, 68040
Keywords: 3000, 68040
Message-ID: <1990May03.062713.25299@csuchico.edu>
Date: 3 May 90 06:27:13 GMT
References: <1990May3.043218.15590@cec1.wustl.edu>
Sender: news@csuchico.edu (USENET)
Reply-To: murphyd@cscihp.UUCP (Dave Murphy)
Organization: California State University, Chico
Lines: 23

In article <1990May3.043218.15590@cec1.wustl.edu> amc4919@cec2.UUCP (Adam Michael Costello) writes:
>If you use that socket in the 3000 to upgrade to a 68040, is it still bound to
>run at 25MHz (or 16MHz, as the case may be)?  In any case, if you upgrade to
>the 68040, does it matter whether the 3000 was 16 or 25?  Can the upgrade be
>done now, or are there things we have to wait for?  The 68040 is a 64-bit
>processor (internally, 32 bit data bus though), right?  What else does the
>'40 have over the '30?

The 68040 is still a 32 bit chip.  It out performs the 030 because of it
use of the pipeline.  By using a pipeline the 040 is able to have multiple
instructions being processed at the same time.  Each instruction is staged
in a different stage of the FETCH, EXECUTE cycle.  This allows many 
a different instruction to complete every clock cycle and there appear to
be executing a instruction every clock cycle.  This same idea is used by
RISC processors and the 80486.  The 040 also has a built in FPU.

I have heard that the 040 operating at 25 MHz will outperform a 40 MHz 030.

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       ///  /\        __||  ||  ||  |  |  David L. Murphy           \\\
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