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    SubjectRe: PCI riser cards and PCI irq routing, etc
    Alistair John Strachan wrote:
    > On Tuesday 20 February 2007 04:17, Udo van den Heuvel wrote:
    >> Krzysztof Halasa wrote:
    >>> Is it a VIA ITX board? I think I have VIA's riser card somewhere,
    >>> could check what it does.
    >> Yes, VIA Epia EN12000.
    >> Interesting to check the riser card.
    >
    > Just be aware that there are two types of PCI riser -- risers that work in any
    > board, and Via Epia-specific risers. The latter requires a BIOS update on
    > some Epias and presumably has some advantages, possible the ones you're
    > looking for.

    This card is sold by TranquilPC for their T2e case which holds Mini-ITX
    boards. My EN12000 has the latest BIOS I could find on the VIA site:
    http://www.via.com.tw/en/products/mainboards/downloads.jsp?motherboard_id=399#BIOS


    I just tested with Device Number 12 and DN 18 (the only free locations
    to try besides the DN 19 default, if I am correct on this).

    DN 12 gave me this:

    00:0c.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
    Subsystem: TERRATEC Electronic GmbH Unknown device 1157
    Flags: medium devsel, IRQ 255
    Memory at fdfff000 (32-bit, non-prefetchable) [size=512]


    No irq! The other card remained at DN20 and irq 20.
    So no visible i2c at all (!) for the DVB-T card.

    DN 18 gave me:

    00:12.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
    Subsystem: TERRATEC Electronic GmbH Unknown device 1157
    Flags: bus master, medium devsel, latency 32, IRQ 20
    Memory at fdffc000 (32-bit, non-prefetchable) [size=512]

    00:14.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
    Subsystem: TERRATEC Electronic GmbH Unknown device 1155
    Flags: bus master, medium devsel, latency 32, IRQ 21
    Memory at fdffb000 (32-bit, non-prefetchable) [size=512]

    The DVB-T card had the same problems as with DN19 in irq mode. Visible
    i2c bus but not usable i2c.

    Any ideas about how to proceed?
    What to test?


    BTW:

    Another case I am considering has this drawing for the riser:
    http://www.morex.com.tw/drawing/MAR122-J%20Drawing.pdf
    DN ranges from 20 to 31. Would this improve the situation?

    Kind regards,
    Udo
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