problem with UDMA mode on XP1000

[Jarkko Santala]

On Wed, 16 Apr 2003, Andrew Gallatin wrote:

>
> Jarkko Santala writes:
>  > I suppose no checking explains the performance. ;) But good to know
>  > anyway. Any reason why it gets enabled by default if its not safe?
>
> The ata code just enables the highest available mode by default.
>
> I'm no expert, but I don't think PIO is safe either.  I think it just
> stresses things so much less than DMA that its assumed to be safe. Drew

How about adding all this into the alpha Hardware Notes?

	-jake

-- 
Jarkko Santala <jake at iki.fi>            http://www.iki.fi/~jake/
System Administrator                    2001:670:83:f08::/64