1.\" $NetBSD: lcd.4,v 1.2 2017/02/17 22:24:46 christos Exp $ 2.\" OpenBSD: lcd.4,v 1.2 2007/07/20 22:41:57 kettenis Exp 3.\" 4.\" Copyright (c) 2007 Mark Kettenis <kettenis@openbsd.org> 5.\" 6.\" Permission to use, copy, modify, and distribute this software for any 7.\" purpose with or without fee is hereby granted, provided that the above 8.\" copyright notice and this permission notice appear in all copies. 9.\" 10.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17.\" 18.Dd February 17, 2017 19.Dt LCD 4 hppa 20.Os 21.Sh NAME 22.Nm lcd 23.Nd front panel LCD display 24.Sh SYNOPSIS 25.Cd "lcd0 at mainbus0" 26.Sh DESCRIPTION 27The 28.Nm 29driver provides support for the front panel LCD display found on newer 30HP PA-RISC workstations and servers. 31This LCD can be made to show a heartbeat based on the load average by 32setting the 33.Xr sysctl 3 34variable 35.Ar machdep.lcd_blink 36to a non-zero value. 37.Sh SEE ALSO 38.Xr sysctl 3 , 39.Xr hppa/intro 4 , 40.Xr sysctl 8 41.Sh HISTORY 42.An -nosplit 43The 44.Nm 45driver first appeared in 46.Ox 4.2 . 47It was ported to 48.Nx 6.0 49by 50.An Adam Hoka 51and 52.An Nick Hudson . 53