I was reading yesterday that this also has to do with whether or not
you are running busmaster drivers on the ide channels.
The "time frame" David G refers to is "right on" for that.
              Rick Glazier

>   I believe the elimination of this issue is far more recent --
> around the introduction of UDMA.  It became less of an issue when
> EIDE provided a second channel, and when newer CD-ROM drives started
> supporting Mode 3 or 4 even though the fastest CD drives are barely
> stretching the limits of Mode 1.
>   But it was right around the introduction of UDMA that IDE/EIDE/UDMA
> channels started being able to have their master and slave devices
> using different modes.

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