1.\" $NetBSD: kg.4,v 1.10 2002/01/15 02:08:38 wiz 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. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" from: @(#)kg.4 8.1 (Berkeley) 6/5/93 35.\" 36.Dd June 5, 1993 37.Dt KG 4 vax 38.Os 39.Sh NAME 40.Nm kg 41.Nd 42.Tn KL-11 Ns / Tn DL-11W 43line clock 44.Sh SYNOPSIS 45.Cd "kg0 at uba0 csr 0176500 vector kglock" 46.Sh DESCRIPTION 47NOTE: This driver has not been ported from 48.Bx 4.4 49yet. 50.Pp 51A 52.Tn KL-11 53or 54.Tn DL-11W 55can be used as an alternative real 56time clock 57source. When configured, certain system 58statistics and, optionally, system profiling work 59will be collected each time the clock interrupts. For 60optimum accuracy in profiling, the 61.Tn DL-11W 62should be 63configured to interrupt at the highest possible priority 64level. The 65.Nm kg 66device driver automatically calibrates itself to the 67line clock frequency. 68.Sh SEE ALSO 69.Xr config 8 , 70.Xr kgmon 8 71.Sh HISTORY 72The 73.Nm 74driver appeared in 75.Bx 4.2 . 76