Messages in this thread | | | Subject | Re: Determining pci bus from irq | From | Alan Cox <> | Date | Tue, 09 Sep 2003 22:20:35 +0100 |
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On Maw, 2003-09-09 at 18:36, Richard B. Johnson wrote: > Unless you've got a 'scope. If a device is interrupting often > or if it can be made to interrupt. you can look at the pin on > the PCI card. For some reason, on ix86, the logical "pin" is > always "A", regardless of the device, so you only have one > interrupt line connected to each slot. On lap-tops, there is > often only one IRQ shared for everything IRQ9 for Compaq.
Multifunction devices may well use more than INTA. A PC does normally use INTA for each device and barberpole the ABCD lines between slots
Quad ethernet cards using ABCD seem common
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