1.\" $NetBSD: lcd.4,v 1.1 2022/06/12 03:51:13 tsutsui Exp $ 2.\" $OpenBSD: lcd.4,v 1.4 2015/02/15 22:26:45 bentley Exp $ 3.\" 4.\" Copyright (c) 2007 Kenji AOYAMA <aoyama@nk-home.net> 5.\" All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.Dd June 12, 2022 29.Dt LCD 4 luna68k 30.Os 31.Sh NAME 32.Nm lcd 33.Nd front panel LCD display 34.Sh SYNOPSIS 35.Cd "lcd0 at mainbus0" 36.Sh DESCRIPTION 37The 38.Nm 39driver provides access to the front panel LCD display on LUNA. 40It is accessed using 41.Xr write 2 42to print the characters on the LCD. 43The device has a physical display area of 16 characters x 2 lines 44and an internal line buffer of 40 characters x 2 lines. 45.Pp 46The following ioctl calls apply to the 47.Nm 48device: 49.Bl -tag -width LCD 50.It Dv LCDCLS 51Clear the LCD screen, restore display area from shift and move the 52cursor to upper-left position. 53.It Dv LCDHOME 54Restore display area from shift and move the cursor to upper-left 55position. 56.It Dv LCDMODE Fa "int *" 57Specify cursor advance direction and display shift mode. 58.It Dv LCDDISP Fa "int *" 59Control display on/off, cursor on/off, and cursor blinking on/off. 60.It Dv LCDMOVE Fa "int *" 61Move the cursor or shift the display area. 62.It Dv LCDSEEK Fa "int *" 63Move the cursor to the specified position. 64On the first line, the position is specified by a value between 0x00 and 0x27. 65On the second line, the value is between 0x40 and 0x67. 66.It Dv LCDRESTORE 67Restore boot-time LCD message. 68.El 69.Pp 70These ioctl parameters are defined in 71.In machine/lcd.h . 72.Sh FILES 73.Bl -tag -width /dev/lcd 74.It Pa /dev/lcd 75.El 76.Sh SEE ALSO 77.Xr ioctl 2 78.Sh HISTORY 79The 80.Nm 81driver originally first appeared in 82.Ox 4.1 . 83It was ported from 84.Ox 85and first appeared in 86.Nx 8.0 . 87