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+.\"     $OpenBSD: vrtc.4,v 1.1 2008/03/08 19:21:06 kettenis Exp $
+.\"
+.\" Copyright (c) 2007 Mark Kettenis <kettenis@openbsd.org>
+.\"
+.\" 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 $Mdocdate: March 8 2008 $
+.Dt VRTC 4 sparc64
+.Os
+.Sh NAME
+.Nm vrtc
+.Nd virtual real-time clock
+.Sh SYNOPSIS
+.Cd "vrtc0 at vbus?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the time of day service provided by the
+UltraSPARC Hypervisor as found on sun4v systems.
+.Pp
+.Sh SEE ALSO
+.Xr intro 4 ,
+.Xr vbus 4
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Ox 4.4 .
+.Sh AUTHORS
+The
+.Nm
+driver was written by
+.An Mark Kettenis Aq kettenis@openbsd.org .