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.\" $DragonFly: src/share/man/man4/vga.4,v 1.6 2008/01/09 22:08:29 swildner Exp $ 29.\" 30.Dd January 9, 2008 31.Dt VGA 4 32.Os 33.Sh NAME 34.Nm vga 35.Nd generic video card interface 36.Sh SYNOPSIS 37.Cd "options VESA" 38.Cd "options VESA_DEBUG=N" 39.Cd "options VGA_ALT_SEQACCESS" 40.Cd "options VGA_NO_FONT_LOADING" 41.Cd "options VGA_NO_MODE_CHANGE" 42.Cd "options VGA_SLOW_IOACCESS" 43.Cd "options VGA_DEBUG=N" 44.Cd "options VGA_WIDTH90" 45.Cd "device vga0 at isa? port ?" 46.Sh DESCRIPTION 47The 48.Nm 49driver is a generic video card driver which provides access to 50video cards. 51This driver is required for the console driver 52.Xr syscons 4 . 53The console driver will call the 54.Nm 55driver to manipulate video hardware (changing video modes, loading font, etc). 56.Pp 57The 58.Nm 59driver supports the standard VGA video cards. 60In addition, the driver can utilize the VESA BIOS Extension if the video card 61supports it. 62VESA support can either be statically included in the kernel 63or can be loaded as a separate module. 64.Pp 65In order to statically link the VESA support into the kernel, the 66.Dv VESA 67option (see below) must be defined in the kernel configuration file. 68.Pp 69The 70.Nm vesa 71module can be dynamically loaded into the kernel using 72.Xr kldload 8 . 73.Sh DRIVER CONFIGURATION 74.Ss Kernel Configuration Options 75The following kernel configuration options 76(see 77.Xr config 8 ) 78can be used to control the 79.Nm 80driver. 81These options provide compatibility with certain VGA cards. 82.Bl -tag -width ".Dv VGA_NO_FONT_LOADING" 83.It Dv VGA_ALT_SEQACCESS 84You may want to try this option if the mouse pointer is not drawn correctly 85or the font does not seem to be loaded properly on the VGA card. 86However, it may cause flicker on some systems. 87.It Dv VGA_DEBUG=N 88Set the VGA support debug level to 89.Fa N . 90The default value is 0, which suppresses all debugging output. 91A value of 2 gives maximum verbosity. 92.It Dv VGA_SLOW_IOACCESS 93Older VGA cards may require this option for proper operation. 94It makes the driver perform byte-wide I/O to VGA registers and 95slow down a little. 96.It Dv VGA_WIDTH90 97This option enables 90 column modes: 90x25, 90x30, 90x43, 90x50, 90x60. 98These modes are not always supported by the video card and the display. 99It is highly likely that LCD display cannot work with these modes. 100.El 101.Pp 102The following options add optional features to the driver. 103.Bl -tag -width ".Dv VGA_NO_FONT_LOADING" 104.It Dv VESA 105Add VESA BIOS Extension support to the driver. 106If the VGA card has the VESA BIOS Extension 1.2 or later, 107this option will utilize it to switch to high resolution modes. 108.It Dv VESA_DEBUG=N 109Set the VESA support debug level to 110.Fa N . 111The default value is 0, which suppresses all debugging output. 112A value of 2 gives maximum verbosity. 113.El 114.Pp 115The following options will remove some features from the 116.Nm 117driver and save kernel memory. 118.Bl -tag -width ".Dv VGA_NO_FONT_LOADING" 119.It Dv VGA_NO_FONT_LOADING 120This option removes font loading from the driver. 121Note that if you use this option and 122still wish to use the mouse on the console then you must also use the 123.Dv SC_ALT_MOUSE_IMAGE 124option. 125See 126.Xr syscons 4 . 127.It Dv VGA_NO_MODE_CHANGE 128This option prevents the driver from changing video modes. 129.El 130.Sh EXAMPLES 131Your kernel configuration should normally have: 132.Pp 133.D1 Cd "device vga0 at isa? port ?" 134.Pp 135The following line should be included in the kernel configuration file 136in order to enable the VESA BIOS Extension support. 137.Pp 138.D1 Cd "options VESA" 139.Pp 140If you do not want VESA support included in the kernel, but 141want to use occasionally, do not add the 142.Dv VESA 143option. 144And load the 145.Nm vesa 146module as desired: 147.Pp 148.Dl kldload vesa 149.Sh SEE ALSO 150.Xr vgl 3 , 151.Xr syscons 4 , 152.Xr config 8 , 153.Xr kldload 8 , 154.Xr kldunload 8 155.Sh STANDARDS 156.Rs 157.%A "Apple, IBM, Motorola" 158.%T "Common Hardware Reference Platform: I/O Device Reference" 159.%B "Appendix A: VGA Programming Model" 160.%P "p. 195" 161.%O "ftp://ftp.software.ibm.com/rs6000/technology/spec/chrp/" 162.Re 163.Pp 164.Rs 165.%T "VESA BIOS Extension (VBE)" 166.%A Video Electronics Standards Association 167.Re 168.Sh HISTORY 169The 170.Nm 171driver first appeared in 172.Fx 3.1 . 173.Sh AUTHORS 174.An -nosplit 175The 176.Nm 177driver was written by 178.An S\(/oren Schmidt Aq sos@FreeBSD.org 179and 180.An Kazutaka Yokota Aq yokota@FreeBSD.org . 181This manual page was written by 182.An Kazutaka Yokota . 183