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Date: Mon, 11 Apr 2005 12:04:49 -0600 (MDT)
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To: dillon@apollo.backplane.com
From: "M. Warner Losh" <imp@bsdimp.com>
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cc: freebsd-current@freebsd.org
Subject: Re: Potential source of interrupt aliasing
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In message: <200504110231.j3B2VOYr047361@apollo.backplane.com>
            Matthew Dillon <dillon@apollo.backplane.com> writes:
:     * PCI busses only have 4 interrupt lines (A, B, C, and D).

PCI Slots have only 4 interrupts.  The BUS can have the interrupt
lines wired in an arbitrary manner.  That's why we need to have $PIR
parsing.

Warner