> I just want to make sure you are absolutely clear on this point. Not only
> will linux in the 2.0.33 and under kernel versions not use UDMA speeds, it
> also won't use the CRC checking that goes along with UDMA modes. Therefore,
> not only can you not set your system up to do bus mastering at UDMA speeds
> (and possibly not at all depending on how different the timings are on this
> chipset vs. earlier Intel PCI chipsets), but you must also make sure that
> the drive itself does not negotiate with the BIOS for anything above PIO
> Mode4.
right, UDMA mode _won't_ work (yet), but the standard DMA modes like
what the older chipsets supported should work. the 430TX chipset has
similar UDMA controllers and 2.0.33 supports its standard DMA (not
UDMA) busmastering capabilities. we have several of these kinds of
boards running linux with their drives in DMA mode and they're quite
happy. the 430TX is basically triton-][ compatible with UDMA support
added on and as far as linux is concerned works just like a
triton-][. i suspect the 440LX is similar.
standard DMA is a far sight better than no DMA at all. UDMA is even
better yet and 2.2 should support it fully when it comes out.
hopefully that'll be by the time i get my own pentium ][........
tim
--
Time is like fingers A | Tim Pickering ([EMAIL PROTECTED])
Gesturing for me to stop -- Quake | UA Steward Observatory
Why is the sun up? Haiku | Tucson, AZ 85721 520-621-6523
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