1.\" 2.\" Copyright (c) 1999 3.\" Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> 4.\" 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 as 11.\" the first lines of this file unmodified. 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 ``AS IS'' AND ANY EXPRESS OR 17.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26.\" 27.\" $FreeBSD: src/share/man/man4/vga.4,v 1.7.2.10 2002/12/20 18:03:05 trhodes Exp $ 28.\" 29.Dd March 3, 2020 30.Dt VGA 4 31.Os 32.Sh NAME 33.Nm vga 34.Nd generic video card interface 35.Sh SYNOPSIS 36.Cd "device vga0 at isa? port ?" 37.Pp 38.Cd "options VGA_KEEP_POWERON_MODE" 39.Cd "options VGA_NO_FONT_LOADING" 40.Cd "options VGA_NO_MODE_CHANGE" 41.Cd "options VGA_DEBUG=N" 42.Cd "options VGA_WIDTH90" 43.Sh DESCRIPTION 44The 45.Nm 46driver is a generic video card driver which provides access to 47video cards. 48This driver is required for the 49.Xr syscons 4 50console driver which will call the 51.Nm 52driver to manipulate video hardware (changing video modes, loading fonts, etc). 53.Pp 54The 55.Nm 56driver supports the standard VGA video cards. 57.Sh DRIVER CONFIGURATION 58The following kernel configuration options can be used to control the 59.Nm 60driver. 61These options provide compatibility with certain VGA cards. 62.Bl -tag -width ".Dv VGA_KEEP_POWERON_MODE" 63.It Dv VGA_DEBUG=N 64Set the VGA support debug level to 65.Fa N . 66The default value is 0, which suppresses all debugging output. 67A value of 2 gives maximum verbosity. 68.It Dv VGA_KEEP_POWERON_MODE 69This option keeps the initial mode's register settings for switching back 70to it from another mode. 71.It Dv VGA_WIDTH90 72This option enables 90 column modes: 90x25, 90x30, 90x43, 90x50, 90x60. 73These modes are not always supported by the video card and the display. 74It is highly likely that LCD display cannot work with these modes. 75.El 76.Pp 77The following option will remove some features from the 78.Nm 79driver and save kernel memory. 80.Bl -tag -width ".Dv VGA_KEEP_POWERON_MODE" 81.It Dv VGA_NO_FONT_LOADING 82This option removes font loading from the driver. 83Note that if you use this option and 84still wish to use the mouse on the console then you must also use the 85.Dv SC_ALT_MOUSE_IMAGE 86option. 87See 88.Xr syscons 4 . 89.It Dv VGA_NO_MODE_CHANGE 90This option prevents the driver from changing video modes. 91.El 92.Sh SEE ALSO 93.Xr vgl 3 , 94.Xr syscons 4 95.Sh STANDARDS 96.Rs 97.%A "Apple, IBM, Motorola" 98.%T "Common Hardware Reference Platform: I/O Device Reference" 99.%B "Appendix A: VGA Programming Model" 100.%P "p. 195" 101.%O "ftp://ftp.software.ibm.com/rs6000/technology/spec/chrp/" 102.Re 103.Sh HISTORY 104The 105.Nm 106driver first appeared in 107.Fx 3.1 . 108.Sh AUTHORS 109.An -nosplit 110The 111.Nm 112driver was written by 113.An S\(/oren Schmidt Aq Mt sos@FreeBSD.org 114and 115.An Kazutaka Yokota Aq Mt yokota@FreeBSD.org . 116This manual page was written by 117.An Kazutaka Yokota . 118