Re: DMA problems with 3+ Promise IDE controllers

From: Alan Cox
Date: Thu Dec 23 2004 - 19:44:28 EST

On Iau, 2004-12-23 at 19:26, Jaco van der Schyff wrote:
> Any idea how I could get all three cards to work in UDMA100 mode?

You either need multiple independant PCI busses or to write an
arbitrator for the IDE DMA layer to ensure that no more than two of the
three are doing DMA transfers at a time and the other waits.


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