Re: [PARPORT] figuring out an ECP port problem

From: Kevin (
Date: Thu May 01 2003 - 10:16:45 EDT

  • Next message: Tim Waugh: "Re: [PARPORT] figuring out an ECP port problem"

    FWIW, I have been using the older VMware versions (up to 2.04) on
    Mandrake systems, from the 2.2 to 2.4 kernels (currently 2.4.18, MD
    8.2). I set my parallel port to ECP in the BIOS, and put the lines

    alias parport_lowlevel parport_pc
    options parport_pc io=0x378 irq=5 dma=3

    in my /etc/modules.conf file. I believe that all necessary PP ECP
    support is either compiled into the Mandrake kernel or available as a
    loadable module, because I use the stock kernel and don't explicitly
    load any other modules (other than the VMware ones of course). I then
    set the parallel port in VMware to /dev/parport0
    with 'bidirectional' checked. This allows me to use my PP scanner from
    the VMware windows session.


    Bret Comstock Waldow wrote:

    >The background is I'm trying to get parallel port access using VMware on
    >a Red Hat 9 linux system.
    >The hardware is an IBM T21 laptop. It has a parallel port, recognized
    >and working fine in Windows.
    >VMware wants an ECP port to allow two-way communication between programs
    >running in the VMware session and the outside world. There is an option
    >in the BIOS to set the port to ECP Mode.
    >After booting into Linux, I can do this:
    >[bret@ganesha learning]$ cat /proc/sys/dev/parport/parport0/base-addr
    >888 1912
    >[bret@ganesha learning]$ cat /proc/sys/dev/parport/parport0/irq
    >[bret@ganesha learning]$ cat /proc/sys/dev/parport/parport0/dma
    >[bret@ganesha learning]$ cat /proc/sys/dev/parport/parport0/modes
    >The first three settings correspond to the settings in the BIOS. I'm
    >not sure about the last.
    >There are other settings for the port mode, with other responses:
    >BIOS response
    >Output Only PCSPP
    >Bi-Directional PCSPP,TRISTATE
    >Should the response for ECP be PCSPP,TRISTATE,ECP? It's not, and VMware
    >reports on start-up that the parallel port doesn't support ECP mode and
    >won't be used.
    >Thanks in advance,
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