[LinuxBIOS] MB1030 / 3036 VGA problems with IRQs

Stefan Reinauer stepan at coresystems.de
Tue May 16 15:57:36 CEST 2006

* Christian Sühs <chris at suehsi.de> [060516 18:54]:
> Is it safe to comment not used devices
> i.e. the created irq table by getpir shows a line for device 8, but 
> there is currently no device, the same for some other currently not used 
> devices.

Yes, most likely you can just remove that entry. This might be entries
for PCI slots though, so a problem might only occur when you plug in a
PCI card..

> Also the exclusive PCI IRQs are set to 10 and 11.
> The Board has a combi PCI/ISA extension Slot. Can I add some IRQs like 5 
> and 9.
might work, might not. This depends of many things for example on how
the mainboard is wired.

> Device where the interrupt router lies is set to
> (0x12<<3)|0x00
> the first seems to be wrong (0:16.0) 0x00 is the better choice.
> I thing "|" means "OR" I'm right?
yes, | is OR.

You should change the device position.

NOTE: 0:16.0 might be 0x16 or 16 (0x10) - you need to find to make it
work right. lspci shows hex values - this confused me quite some time
when we did the opteron port..

Not necessarily the device ID though, since Linux might not support the
actually used interrupt router. I think on K8 boards the IRQ router
device and vendor id is still set to the k7 interrupt router (it was in
the past) because the two devices were compatible and linux did only know
the older part.


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