Trying a Promise Ultra/66 on powerpc

David A. Gatwood dgatwood at
Mon Aug 9 15:18:28 EST 1999

On Mon, 9 Aug 1999, Paul Mackerras wrote:

> > I've solved the problem by adding the right offset directly to the
> > io-port values as found in the kernel's PCI structures. I think this
> > needs more serious rework, though. Paul, are you the author of the
> > PowerMac IDE stuff? So we can work this out... 
> Yep, for my sins. :-) :-)
> Also, does anyone know how a quick way to get the best DMA cycle
> timing values in a tuneproc?

You mean for IDE?  Check the MkLinux driver.  One of Apple's folks ported
some OS X (server?) code in for IDE DMA timings a couple months back.


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