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+.\"   $OpenBSD: ioapic.4,v 1.1 2006/10/27 09:10:00 kettenis Exp $
+.\"
+.\" Copyright (c) 2006 Mark Kettenis
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd October 27, 2006
+.Dt IOAPIC 4
+.Os
+.Sh NAME
+.Nm ioapic
+.Nd I/O Advanced Programmable Interrupt Controller
+.Sh SYNOPSIS
+.Cd "ioapic0 at mainbus0"
+.Sh DESCRIPTION
+.Nm
+is an I/O Advanced Programmable Interrupt Controller (APIC).
+It provides interrupt management for systems with multiple I/O
+subsystems and can distribute interrupts across multiple processsors.
+.Sh SEE ALSO
+.Xr intro 4
+.Sh STANDARDS
+.Nm
+is based on
+Intel's 82093AA I/O Advanced Programmable Interrupt Controller (I/O APIC)
+specification.
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Ox 3.5 .
+.Sh AUTHORS
+The
+.Nm
+driver was written by
+.An Bill Sommerfield .