> > On a typical PCI system each device only gets a single interrupt pin (a > > PCI bus has 4, but each device is only supposed to use 1), and several > > devices share an interrupt line. > > > > Thus all interrupts should be maskable on the device, and probably > > combined into a single output after masking. > > I'm not a PCI expert. However, you are talking about the actual > physical implementation in PCI. If masking is required, this would be a > function in the PCI interface. However, IIUC, PCI devices are allowed > multiple interrupts -- each PCI device is allowed to use all 4 > interrupts. If they share common physical interrupt lines, this is an > issue with the PCI interface hardware and driver.
Each physical card has 4 interrupt pins (usually with a total of 4 shared lines per bus), however each logical PCI device is only allowed to use a single pin. IMHO the sync interrupt doesn't need to be different from to any other interrupt. Paul _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
