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Good PC's needed (80386, 8086, 4004 :-D) report what you h (Developers)

posted by RayeR Homepage, CZ, 02.05.2008, 01:15

> Not disabled, but defective. Intel's method was to have one production
> line, then test chips. Good FPU > sell as DX. Bad FPU > sell as SX.
> Similarly with speed - run chip at increasing frequencies, then label
> according to where errors begin.
Do you think they had as many defective CPUs as they sold SX processors? I think that math coprocessor itself takes only small surface of silicon die, sure much smaller than cache. Probability of def. FPU would be smaller than def. cache. If intel would have so many defects they will not survive. And for flexibility of suplying variable damand of DX/SX CPUs it's good idea to be able to quickly turn DX to SX after silicon dies was made and just put different marking on it. Ad CPU speed - I agree.

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DOS gives me freedom to unlimited HW access.

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