* 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

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