Overclocking ATs

Sridhar Ayengar ploopster at gmail.com
Tue Nov 14 09:02:49 CST 2006


Gordon JC Pearce wrote:
> Jim Leonard wrote:
>> Al Hartman wrote:
>>> Harris Semiconductor made licensed 80286 CPU's.
>>>
>>> They made them in 16 and 20mhz versions.
>>>
>>> I used to sell systems made with them, and at the time the 386sx came 
>>> out, a 286-20 was MUCH faster than a 386 20mhz...
>>
>> How is that possible?  The 386 improved many instructions to run in 
>> fewer clocks...
>>
>> Besides, I'd always take a 386-16 over a 286-20, because the 286-20 
>> runs protected mode applications at 0MHz ;-)
> 
> I don't know, but I remember comparing two side-by-side and the 286 
> absolutely horsed the 386sx.  IIRC it was about 15% faster - *really* 
> noticable difference.

Did the 286 have a 287?  Was there floating-point code in the 
application you were using?

Peace...  Sridhar



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