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Article #100

Re: 386/486 clock (1x or 2x)?

#100
From: |S| Norbert Juffa
Date: Thu, 23 Jul 1992 14:42
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2133 bytes
In <RFowler.288@kelvin.jpl.nasa.gov> RFowler@kelvin.jpl.nasa.gov writes:

> In comp.ibm.pc.hardware there is a thread about weather the 486DX uses a 1x 
> or a 2x clock.  I (perhaps mistakenly) said it used a 2x clock, (all of the 
> motherbords I've seen had a 2x occilator) could some one with a real data 
> book clarify?
> 
> The 386 does(?) use a 2x clock?

The 386 uses a 2x clock, while the 486 uses a 1x clock. However, there are
chip sets used in 486 machines that like to have a 2x clock as input, they
put out a 1x clock to the 486 though. Maybe they hope to make the CPU clock
input more stable that way, I don't know. There are 486 motherboards that
let you select if you want to run with a 2x or 1x oscillator. Sorry, can't
remember the manufacturer now.

>     _________________________________________________________________
>                         
>                         HONDA -- The only way to fly
>     o          
>   _/\_>   -A proud owner (just wish they were made in the USA)
>  O,> / O   [with all respects to Ohio MINE were made in Japan]
>            
>                            CM400T/XL500R/VF500F
>                              '79   '82    '84
>                            
>      Slower trafic keep right (SUCKzukies, HDs, etc.) ->->->->->->->
>     _________________________________________________________________

Norbert
-----------------------------------------------------------------------------
Norbert Juffa      email: S_JUFFA@IRAVCL.IRA.UKA.DE        Live and let live!
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References: <RFowler.288@kelvin.jpl.nasa.gov>

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From: S_JUFFA@iravcl.ira.uka.de (|S| Norbert Juffa)
Newsgroups: comp.sys.intel
Subject: Re: 386/486 clock (1x or 2x)?
Date: 23 Jul 1992 14:42:53 GMT
Organization: University of Karlsruhe (FRG) - Informatik Rechnerabt.
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In-Reply-To: RFowler@kelvin.jpl.nasa.gov's message of 21 Jul 92 19:46:55 GMT