Re: [PARPORT] ECP hardware detection

From: Tim Waugh (
Date: Mon Jul 30 2001 - 19:14:57 EDT

  • Next message: David Lambert: "[PARPORT] Bug or feature?"

    On Mon, Jul 30, 2001 at 05:11:32PM -0500, David Lambert wrote:

    > I just wasted the best part of the day debugging my user mode ECP
    > driver only to find that I had inadvertently set the parallel port
    > to 'standard' in the BIOS. The software negotiated to ECP mode
    > fine, but when it came time to read, the peripheral's data lines
    > were clobbered, due to the hardware drivers not reversing. My
    > question is. Is there any way of my driver detecting the mode that
    > the BIOS has set the hardware?

    Writing different values to the data port and reading them back?


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