Re: Compact Flash Serial ATA patch

[Helge Hafting <helge.hafting@aitel.hist.no>]

markus reichelt wrote:
> * Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
>
>   
> > On Maw, 2006-05-23 at 04:16 -0600, Russell McConnachie wrote:
> >     
> > > I am not exactly a programmer, I'm sure this can be written much
> > > better but for anyone who may run into a similar problem with
> > > compact flash.
> > >       
> > Some CF adapters do not include all the neccessary pins for DMA
> > because they were designed to be cheap before the idea of CF using
> > DMA seemed realistic.
> >     
>
> Some CF adapters I've seen included all necessary pins but the pin
> connections for DMA were missing. Someone at a slackware mailing list
> was having the same problem, and if I recall correctly (better check
> specs though) it can be fixed quite easily:
>
> CF pin 44: disconnect from +V, connect to IDE pin 29.
> CF pin 43: connect to IDE pin 21.
>
> Typical transfer rates increased to about 10-12 MB/s
>   
No more than that?  I have a CF card on parallel IDE,
hdparm can read 20MB/s from it with the 4GB 100xKingston
card I use to boot from.  Of course this card was bought
precisely for its speed (and size).

Helge Hafting

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