1.\" $NetBSD: kg.4,v 1.13 2005/06/20 13:25:25 peter Exp $ 2.\" 3.\" Copyright (c) 1983, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" from: @(#)kg.4 8.1 (Berkeley) 6/5/93 31.\" 32.Dd June 5, 1993 33.Dt KG 4 vax 34.Os 35.Sh NAME 36.Nm kg 37.Nd 38.Tn KL-11 Ns / Ns Tn DL-11W 39line clock 40.Sh SYNOPSIS 41.Cd "kg0 at uba0 csr 0176500 vector kglock" 42.Sh DESCRIPTION 43NOTE: This driver has not been ported from 44.Bx 4.4 45yet. 46.Pp 47A 48.Tn KL-11 49or 50.Tn DL-11W 51can be used as an alternative real 52time clock 53source. When configured, certain system 54statistics and, optionally, system profiling work 55will be collected each time the clock interrupts. For 56optimum accuracy in profiling, the 57.Tn DL-11W 58should be 59configured to interrupt at the highest possible priority 60level. The 61.Nm kg 62device driver automatically calibrates itself to the 63line clock frequency. 64.Sh SEE ALSO 65.Xr config 1 , 66.Xr kgmon 8 67.Sh HISTORY 68The 69.Nm 70driver appeared in 71.Bx 4.2 . 72