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To: Bill Jackson who wrote (43470)6/8/2001 6:38:21 PM
From: TenchusatsuRead Replies (1) | Respond to of 275872
 
Bill, there are two very different scenarios here. In the case of the 486SX, the FPU was designed in, but disabled with a trivial mechanism. In the case of the Willamette (Pentium 4), the features never made it to first silicon. It's not like those P4 features which didn't make the cut can simply be activated with a trivial mechanism. It's also very unlikely that any of those features will show up in Northwood all-of-a-sudden.

It's like the difference between a car with no turbocharger, though one may have been planned in the preliminary designs, and a car with a turbocharger that simply isn't activated.

Tenchusatsu