| vga.4 (43725) | vga.4 (43844) |
|---|---|
| 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: --- 10 unchanged lines hidden (view full) --- 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.\" | 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: --- 10 unchanged lines hidden (view full) --- 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.\" $Id: $ | 27.\" $Id: vga.4,v 1.1 1999/02/07 05:40:14 yokota Exp $ |
| 28.\" | 28.\" |
| 29.Dd February 6, 1999 30.Dt VGA 4 i386 | 29.Dd February 9, 1999 30.Dt VGA 4 |
| 31.Os FreeBSD 32.Sh NAME 33.Nm vga 34.Nd 35generic video card interface 36.Sh SYNOPSIS 37.Cd "options" \&"VESA\&" 38.Cd "options" \&"VESA_DEBUG=N\&" --- 8 unchanged lines hidden (view full) --- 47.Nm 48driver is a generic video card driver which provides access to 49video cards. This driver is required for the console driver 50.Xr syscons 4 . 51The console driver will call the 52.Nm 53driver to manipulate video hardware (changing video modes, loading font, etc). 54.Pp | 31.Os FreeBSD 32.Sh NAME 33.Nm vga 34.Nd 35generic video card interface 36.Sh SYNOPSIS 37.Cd "options" \&"VESA\&" 38.Cd "options" \&"VESA_DEBUG=N\&" --- 8 unchanged lines hidden (view full) --- 47.Nm 48driver is a generic video card driver which provides access to 49video cards. This driver is required for the console driver 50.Xr syscons 4 . 51The console driver will call the 52.Nm 53driver to manipulate video hardware (changing video modes, loading font, etc). 54.Pp |
| 55The keyword 56.Em conflicts 57is required, as the video card may use I/O ports in the same range 58as other drivers. 59.Pp |
|
| 55The 56.Nm | 60The 61.Nm |
| 57driver supports the standard video cards: MDA, CGA, EGA and VGA. 58In addition, the driver can utilize the VESA BIOS extension, 59if the video card has one. 60VESA support can either be statically included in the kernel or 61available as a separate module. | 62driver supports the standard video cards: MDA, CGA, EGA and VGA. In 63addition, the driver can utilize VESA BIOS extensions if the video card 64supports them. VESA support can either be statically included in the kernel 65or can be loaded as a separate module. |
| 62.Pp | 66.Pp |
| 63In order to statically link the support to the kernel, define the | 67In order to statically link the support to the kernel, the |
| 64.Em VESA 65option (see below) and the 66.Em VM86 | 68.Em VESA 69option (see below) and the 70.Em VM86 |
| 67option in the kernel configuration file. | 71option must be defined in the kernel configuration file. |
| 68.Pp 69The 70.Nm vesa | 72.Pp 73The 74.Nm vesa |
| 71module can be loaded to the kernel, without static VESA support, by | 75module can be dynamically loaded into the kernel using |
| 72.Xr kldload 8 . | 76.Xr kldload 8 . |
| 73The | 77This requires the |
| 74.Em VM86 | 78.Em VM86 |
| 75option is required in the kernel configuration file in this case too. | 79option to be defined in the kernel configuration file. |
| 76.Sh DRIVER CONFIGURATION 77.Ss Kernel Configuration Options | 80.Sh DRIVER CONFIGURATION 81.Ss Kernel Configuration Options |
| 78The following kernel configuration options control the | 82The following kernel configuration options 83.Pq see Xr config 8 84can be used to control the |
| 79.Nm 80driver. | 85.Nm 86driver. |
| 81They may be set in the kernel configuration file 82.Pq see Xr config 8 . 83.Pp 84The following options are to provide compatibility with certain VGA 85cards. | 87These options provide compatibility with certain VGA cards. |
| 86.Bl -tag -width MOUSE 87.It Em VGA_ALT_SEQACCESS 88You may want to try this option if the mouse pointer is not drawn correctly | 88.Bl -tag -width MOUSE 89.It Em VGA_ALT_SEQACCESS 90You may want to try this option if the mouse pointer is not drawn correctly |
| 89or font does not seem to be loaded properly on the VGA card. | 91or the font does not seem to be loaded properly on the VGA card. |
| 90However, it may cause flicker on some systems. 91.It Em VGA_SLOW_IOACCESS 92Older VGA cards may require this option for proper operation. 93It makes the driver perform byte-wide I/O to VGA registers and 94slow down a little. 95.El 96.Pp 97The following options add optional features to the driver. 98.Bl -tag -width MOUSE 99.It Em VESA 100Add VESA BIOS support to the driver. 101If the VGA card has the VESA BIOS extension 1.2 or later, 102this option will utilize the VESA BIOS service to switch to high 103resolution modes. 104This option requires the 105.Em VM86 106option. 107.It Em VESA_DEBUG=N | 92However, it may cause flicker on some systems. 93.It Em VGA_SLOW_IOACCESS 94Older VGA cards may require this option for proper operation. 95It makes the driver perform byte-wide I/O to VGA registers and 96slow down a little. 97.El 98.Pp 99The following options add optional features to the driver. 100.Bl -tag -width MOUSE 101.It Em VESA 102Add VESA BIOS support to the driver. 103If the VGA card has the VESA BIOS extension 1.2 or later, 104this option will utilize the VESA BIOS service to switch to high 105resolution modes. 106This option requires the 107.Em VM86 108option. 109.It Em VESA_DEBUG=N |
| 108Set the VESA support debug level to N. 109The default value is zero (all debugging output is suppressed). | 110Set the VESA support debug level to 111.Fa N . 112The default value is zero, which suppresses all debugging output. |
| 110.El 111.Pp 112The following options will remove some features from the 113.Nm 114driver and save kernel memory. 115.Bl -tag -width MOUSE 116.It Em VGA_NO_FONT_LOADING 117The 118.Nm 119driver can load software font to EGA and VGA cards. 120This option removes this feature. 121.It Em VGA_NO_MODE_CHANGE | 113.El 114.Pp 115The following options will remove some features from the 116.Nm 117driver and save kernel memory. 118.Bl -tag -width MOUSE 119.It Em VGA_NO_FONT_LOADING 120The 121.Nm 122driver can load software font to EGA and VGA cards. 123This option removes this feature. 124.It Em VGA_NO_MODE_CHANGE |
| 122This option disallows the driver to change video modes. | 125This option prevents the driver from changing video modes. |
| 123.El 124.\".Sh FILES 125.Sh EXAMPLE 126Your kernel configuration should normally have: 127.Pp 128.Dl "device vga0 at isa? port ? conflicts" 129.Pp 130The following lines should be included in the kernel configuration file 131in order to enable the VESA BIOS Extension support. 132.Pp 133.Dl "options" \&"VM86\&" 134.Dl "options" \&"VESA\&" 135.Dl "device vga0 at isa? port ? conflicts" 136.Pp | 126.El 127.\".Sh FILES 128.Sh EXAMPLE 129Your kernel configuration should normally have: 130.Pp 131.Dl "device vga0 at isa? port ? conflicts" 132.Pp 133The following lines should be included in the kernel configuration file 134in order to enable the VESA BIOS Extension support. 135.Pp 136.Dl "options" \&"VM86\&" 137.Dl "options" \&"VESA\&" 138.Dl "device vga0 at isa? port ? conflicts" 139.Pp |
| 137If you do not want the VESA support always included in the kernel, but | 140If you do not want VESA support included in the kernel, but |
| 138want to use occasionally, add the following lines to the kernel configuration | 141want to use occasionally, add the following lines to the kernel configuration |
| 139file. | 142file: |
| 140.Pp 141.Dl "options" \&"VM86\&" 142.Dl "device vga0 at isa? port ? conflicts" 143.Pp | 143.Pp 144.Dl "options" \&"VM86\&" 145.Dl "device vga0 at isa? port ? conflicts" 146.Pp |
| 144And load the | 147Then load the |
| 145.Nm vesa | 148.Nm vesa |
| 146module, when desired, as follows. | 149module as desired: |
| 147.Pp 148.Dl kldload vesa 149.Pp 150.\".Sh DIAGNOSTICS 151.\".Sh CAVEATS 152.\".Sh BUGS 153.Sh SEE ALSO | 150.Pp 151.Dl kldload vesa 152.Pp 153.\".Sh DIAGNOSTICS 154.\".Sh CAVEATS 155.\".Sh BUGS 156.Sh SEE ALSO |
| 157.Xr syscons 4 , 158.Xr config 8 , |
|
| 154.Xr kldload 8 , 155.Xr kldunload 8 . 156.Sh STANDARD 157.Rs 158.%T "VESA BIOS Extension (VBE)" 159.%A Video Electronics Standards Association 160.Re 161.Sh HISTORY --- 13 unchanged lines hidden --- | 159.Xr kldload 8 , 160.Xr kldunload 8 . 161.Sh STANDARD 162.Rs 163.%T "VESA BIOS Extension (VBE)" 164.%A Video Electronics Standards Association 165.Re 166.Sh HISTORY --- 13 unchanged lines hidden --- |