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+.\" $NetBSD: rtc.4,v 1.8 2017/07/03 21:30:58 wiz Exp $
+.\"
+.\" Copyright (c) 1998 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Julian Coleman.
+.\"
+.\" 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+.\" ``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 FOUNDATION OR CONTRIBUTORS
+.\" 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.
+.\"
+.Dd November 21, 1999
+.Dt RTC 4 atari
+.Os
+.Sh NAME
+.Nm rtc
+.Nd Atari Real Time Clock
+.Sh SYNOPSIS
+.Cd "clock0 at mainbus0"
+.Sh DESCRIPTION
+The
+.Nm
+driver supports reading from and writing to the Atari real time clock (RTC).
+When reading from the RTC, the format string of the output, as described in
+the
+.Xr strftime 3
+manual page, is:
+.Bd -literal -offset indent
+``%Y%m%d%H%M.%S''
+.Ed
+.Pp
+The same format is used to set the RTC to the current date. Note that the
+kernel expects the RTC to run in UTC.
+.Sh FILES
+.Bl -tag -width "xxxxxxxxxx" -compact
+.It Pa /dev/rtc
+.El
+.Sh EXAMPLES
+date -u +%Y%m%d%H%M.%S > /dev/rtc
+.Sh SEE ALSO
+.Xr date 1 ,
+.Xr strftime 3