Re: [PARPORT] ECP printing problem

From: Tim Waugh (
Date: Fri Aug 23 2002 - 04:33:56 EDT

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    On Thu, Aug 22, 2002 at 06:42:20AM -0400, Blaise Gassend wrote:

    > I suspect that the absence in DMA read support probably explains why
    > this would be so CPU intensive.
    > I have a DMA read routine working for my cpia camera, but am having
    > trouble adapting it to the general parport driver. I sent a message
    > about my problems a few months ago, but got no replies. If any parport
    > gurus were willing to give me a hand it should be possible to get the
    > routine working with very little work.

    The trouble is that the DMA support in the parport driver is known to
    be unreliable. We never traced it down; it could be due to hardware
    for all I know.


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