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Technology Stocks : Apple Inc.

AAPL 273.40

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Dec 26 9:30 AM EST

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To: Robert Salasidis who wrote (789)	1/6/1997 1:22:00 PM
From: Meghan Richards	of 213177

You are correct ... the MMX situation is not a bug. The facts are as you stated ... the Pentium-MMX requires several clock cycles when switching between floating point and MMX mode. It takes longer to switch in one direction than the other (but I forget which one is longer). The number of clock cycles between the two modes will be considerably less on the upcoming PPro releases. So this 'problem' goes away shortly. The 20% speed improvement in the Pentium-MMX comes about because they increased the size of the L1 cache (not because of the additional MMX instructions). I've heard performance numbers that are all over the map when the software utilizes the new MMX instructions.

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