Re: IRQ sharing.

Stephen Williams (steve@icarus.icarus.com)
Fri, 20 Mar 1998 22:19:46 -0800


yuri@nycny.bdm.com said:
> I just got an Advansys ABP-980U SCSI controller. The thing uses 4 IRQs
> (its basically 4 controllers on one card with a PCI bridge chip).
> Here's the problem - although I have 6 IRQs free - both the VGA board
> and the Intel Etherexpress 100 insist on sharing IRQs with the
> Advansys card. (Or is it the other way around) I've tried resetting
> BIOS, CMOS, you name it.

PCI device drivers must be prepared to share IRQs with other devices. If
it cannot, it is broken. You may never get it working.

ISE device drivers, on the otherhand, typically do not support such things.
What you should do is note the IRQs used by the ISA devices, then go into
the BIOS configuration and set those IRQs to "ISA Reserved" or some such.
How this is done depends on your BIOS.

-- 
Steve Williams                "The woods are lovely, dark and deep.
steve@icarus.com              But I have promises to keep,
steve@picturel.com            and lines to code before I sleep,
http://www.picturel.com       And lines to code before I sleep."

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