1.\" $NetBSD: rtc.4,v 1.8 2017/07/03 21:30:58 wiz Exp $ 2.\" 3.\" Copyright (c) 1998 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Julian Coleman. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd November 21, 1999 31.Dt RTC 4 atari 32.Os 33.Sh NAME 34.Nm rtc 35.Nd Atari Real Time Clock 36.Sh SYNOPSIS 37.Cd "clock0 at mainbus0" 38.Sh DESCRIPTION 39The 40.Nm 41driver supports reading from and writing to the Atari real time clock (RTC). 42When reading from the RTC, the format string of the output, as described in 43the 44.Xr strftime 3 45manual page, is: 46.Bd -literal -offset indent 47``%Y%m%d%H%M.%S'' 48.Ed 49.Pp 50The same format is used to set the RTC to the current date. Note that the 51kernel expects the RTC to run in UTC. 52.Sh FILES 53.Bl -tag -width "xxxxxxxxxx" -compact 54.It Pa /dev/rtc 55.El 56.Sh EXAMPLES 57date -u +%Y%m%d%H%M.%S > /dev/rtc 58.Sh SEE ALSO 59.Xr date 1 , 60.Xr strftime 3 61