>Date: Sun, 8 Sep 2002 10:10:26 -0400

>From: "Edward J. Cetron" <[EMAIL PROTECTED]>
>
>I'm trying to determine the clock speed of a Performa 578 --- according =
>to this reference:
>
>http://docs.info.apple.com/article.html?artnum=3D15225  it is 33Mhz
>
>but this one:
>
>http://docs.info.apple.com/article.html?artnum=3D112241  says 66Mhz....

Is the P578 a 68040 machine?  If so, that's Apple's retcon'ing 
marketing department at work.

The 68040 runs at 33  MHz (or 25 or 40 on other machines).  There is 
one little piece of the chip which uses a 66 MHz signal and so Apple 
started claiming that their '040 machines were clock doubled, like 
the 80486s of the day truly were, but it was a big lie.

So the original specs said 33 MHz and the later marketing weenie 
stuff said 33/66 or just 66.

Jeff Walther

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