Andrew Kohlsmith wrote:
Actually that is untrue. There are four INT# lines on a PCI bus. *everything* uses INTA# and relies on the chipset and motherboard to correctly "wire" it up so they don't share... I was going to ask Digium if they could bring all four INT# lines into the FPGA and allow me to select which INT# to use, it'd sure give a HELL of a better chance at finding a free IRQ, wouldn't it? Especially for those goddamned motherboards that DON'T "cascade" the INT# lines...
And newer boards with more intelligent APICs don't have this problem at all, since every slot has INTA wired to a separate APIC input :-) From what I understand, there are even boards out there where the INTAs are all wired to separate inputs, but then combined in the (less intelligent) APIC.
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