Re: [PARPORT] ECP printing problem

From: Blaise Gassend (
Date: Thu Aug 22 2002 - 06:42:20 EDT

  • Next message: Tim Waugh: "Re: [PARPORT] ECP printing problem"


    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.


    > I must say that while SuperDisk works, it consumes huge amounts of CPU
    > resources and it is practically impossible to do anything while the
    > disk is in use. System load goes to 2.00 on my Pen4 1.7GHz even with
    > nice=20 parameter.
    > There are definitely some problems with buffers/FIFOs in the
    > parport/superdisk-related drivers or I do not know how to tune the
    > driver parameters.

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