Hi, On Sun, Mar 14, 2010 at 05:14:33PM +0100, Martin van Es wrote: > ? Pin A11: additional 33 MHz PCI clock > ? Pin B10: additional PCI request signal (i.e., PREQ#2) > ? Pin B14: additional PCI Grant signal (i.e., GNT#2) > ----- > > I'm 100% sure the Tranquil riser does not support this suggestion > since the A11/B10 and B14 leads are not used on the riser. Your riser card doesn't need these signals thanks to the IT8209R. The drawback is that the cards will be granted less bus time when competing with on board PCI peripherals. > On the other hand, my guess would be that an ordinary > riser with arbiter and the correct wiring should do the trick. My > question is more or less the same as Udo's in the thread I posted: how > do I check if int 17 of the second card is correctly connected to int > A of the second slot and if not, where to start changing things? PCI slots have four interrupts, INTA, INTB, INTC, and INTC. Riser cards usually permute these for the second and following slots to avoid interrupt sharing. The BIOS has a built-in table that tells Linux for every slot which pin of the interrupt controller is connected to these four interrupt lines. So we need to make the second slot appear to the BIOS to be one where INTA is same interrupt as (probably) INTB of the first slot. Slots are addressed using the IDSEL line. Every slot has its own line. To reduce the number of signals (and to allow riser cards) the PCI standards suggests reusing the upper AD lines as IDSEL lines for the slots. So by changing the AD line connected to the IDSEL line of the second slot with the jumper on the riser card, the slot will get another number and thus another interrupt mapping. According to the ICH7 datasheet you should currently have selected AD24, as your card is 08.0 on the bus (strange... at that position should have been the intel ethernet controller..). Just subtract 16 from the AD number to get the slot number. Now try all of them until you find one where interrupts work. Avoid those already in use on the same bus as listed by "lspci -tv". Good luck! Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
