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+.\"-
+.\" Copyright (c) 2004 Jason L. Wright (jason@thought.net)
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+.\" DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+.\"
+.\"	from: OpenBSD: clkbrd.4,v 1.2 2005/02/21 11:29:36 jmc Exp
+.\" $FreeBSD$
+.\"
+.Dd June 18, 2005
+.Dt CLKBRD 4 sparc64
+.Os
+.Sh NAME
+.Nm clkbrd
+.Nd "clock board"
+.Sh SYNOPSIS
+.Cd "device clkbrd"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the clock board found in
+.Tn Sun Enterprise xx00
+systems.
+The clock board has three status LEDs labeled
+.Dq Li Power ,
+.Dq Li Failure
+and
+.Dq Li Cycling .
+These LEDs are also mirrored on the main front panel.
+The
+.Dq Li Cycling
+LED can be made to blink by writing
+.Tn ASCII
+strings to the
+.Pa /dev/led/clockboard
+device.
+.Pp
+On attach the
+.Nm
+driver also prints out the number of board slots the chassis provides.
+.Sh FILES
+.Bl -tag -width ".Pa /dev/led/clockboard"
+.It Pa /dev/led/clockboard
+clock board LED device node
+.El
+.Sh CAVEATS
+Hardware management functionality is not implemented.
+.Sh SEE ALSO
+.Xr fhc 4 ,
+.Xr led 4
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Ox 3.7 .
+The first
+.Fx
+version to include it was
+.Fx 6.0 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An "Jason L. Wright"
+and ported to
+.Fx
+by
+.An "Marius Strobl" Aq marius@FreeBSD.org .