Re: [PARPORT] Port Multiplexor Problem

From: Mike Murphy (
Date: Fri Feb 02 2001 - 15:48:31 EST

  • Next message: Tim Waugh: "Re: [PARPORT] Port Multiplexor Problem"

    From looking at the parswitch driver, it seems the hard part is determining
    how to communicate with my multiplexor to get it to switch. parswitch
    appears to be a bare-bones clone of lp.c; is this an accurate assessment?

    Thanks for your help.


    ----- Original Message -----
    From: "Tim Waugh" <>
    To: "Mike Murphy" <>
    Cc: <>
    Sent: Friday, February 02, 2001 9:03 AM
    Subject: Re: [PARPORT] Port Multiplexor Problem

    On Fri, Feb 02, 2001 at 08:21:04AM -0800, Mike Murphy wrote:

    > I recently purchased what I believed to be a port multiplexor (4
    > way), but the parport driver doesn't seem to recognize it and only
    > recognizes whichever printer is currently selected on the device. I
    > suspect the multiplexor doesn't speak the 1284.3 protocol, if this
    > is even a possibility (haven't read the spec or have much experience
    > with these devices). It comes with some windows software which will
    > (allegedly) operate the autoswitch.

    There certainly are non-IEEE1284.3 multiplexors out there. For



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