🚀 go-pugleaf

doconnor@sedona.intel.com (Dennis O'Connor) writes:

>Both the Intel486(tm) SX and DX have 32-bit external busses.
>The Intel486 DX has an FPU, the Intel486 SX does not. And the pinouts
>are a tiny bit different. If your 486SX board has the right stuff ( either
>a "Vacancy" socket or signal-routing jumpers ) you can upgrade
>it to an Overdrive processor ( equivalent to a clock-doubled 486DX ),
>or maybe to a DX.

>In contrast, I think the Cyrix "486" part has only a 16-bit bus.


>--
>Dennis O'Connor			doconnor@sedona.intel.com

Sorry to keep at this.  Perhaps a FAQ is in order.  It is my understanding
that the current 487sx chip does not do clock doubling, and thus just adds
an FPU to a 486sx system.  What those of us with 486sx systems would like
to see, of course, is a 487sx2 which gives us the clock doubling boost
plus the FPU.  I realise that Intel does not discuss unannounced chips and
would not ask for that information, but exactly what is announced at this
point?  The BYTE add for July '92 claims "1.50X" performance using Windows
with OverDrive (page 90).  Is this FPU, new chip architecture, clock
doubling related or merely a typical (or atypical) application performance
difference?

Thanks for any clarification.

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