Low performance of the IDE on the SIS550

ollie lho ollie at sis.com.tw
Sun Oct 6 22:52:00 CEST 2002

On Fri, 2002-10-04 at 05:36, Yves Godin wrote:
> At 01:24 PM 10/3/02 -0500, you wrote:
> >Yves Godin wrote:
> >
> >>Anyway, with the UDMA mode 2 I should have the performance that I need. I 
> >>look on header of the ide connector and the burst when writing seems to 
> >>be quick anough but between each of these bursts I have a hole of 5-6 seconds.
> >
> >How are you looking at the ide header? Logic Analyzer, scope?? If so, are 
> >you saying that the dma burst timing looks good but you are getting pauses 
> >of 5 -6 seconds between bursts?
> I`am looking the DRQ signal on th ide header with a scope. Now I'm getting 
> pauses of 2-3 seconds in writing. It`s weird because I don`t observe this 
> on a P133 which is slower that the SIS550 and the read seems ok.

What boad and chipset revision are you using ?? Can you contact our
marketing/technical support ??


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