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    SubjectRe: Understanding lspci output
    John Sigler wrote:
    >>> 4. Does the system have a PCI-X bus?
    >>
    >> Yes, the devices on bus 01 are PCI-X devices, so there is a PCI-X bus.
    >
    > I thought PCI-X devices could operate on a PCI bus? If that is true,
    > then the presence of a PCI-X device would not necessarily imply the
    > presence of a PCI-X bus, right?
    >
    > There are no external PCI-X slots in the system, only 2 PCI slots.
    > The 4 NICs are integrated to the motherboard.
    > http://advantech.com/products/1U-Rackmount-Intel-Pentium-4Processor-based-Platform-with-4PCI-LAN-Ports-2-PCI-Expansion-Slots/mod_1-23A2W4.aspx

    The NICs are all PCI-X devices and they report "64bit+" so they will be
    running on a PCI-X bus internally.

    >
    >
    >>> 2. Do any of the PCI buses support 66 MHz operation?
    >>
    >> Yes, PCI-X does.
    >
    > So the 01:0f.0 device (Multimedia video controller) is on the same bus
    > as the 4 PCI-X devices and will have to share the bus bandwidth?
    >
    > Does 66MHz+ in the Status line means this device is running at 66 MHz?

    I believe so.

    >
    >>> 3. Do any of the PCI slots support 64-bit data path?
    >>
    >> This cannot be inferred from the lspci output -- there is no way how to
    >> tell if a bus has physical slots or it exists only internally.
    >
    > Can I use lspci to see whether a specific PCI device is using a 64-bit
    > data path? (e.g. the 01:0f.0 device)

    The "Multimedia video controller: DekTec Digital Video B.V. DTA-105"
    doesn't report PCI-X capabilities. And looking at the card on their web
    site, it does not have a 64-bit extension, so it doesn't support 64-bit.

    --
    Robert Hancock Saskatoon, SK, Canada
    To email, remove "nospam" from hancockr@nospamshaw.ca
    Home Page: http://www.roberthancock.com/

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