01a8a1dd1d
capabilities. Most of the capabilities (all of the arcane ones) were in FreeBSD-2.0.5, but were harder to use then, and vidcontrol didn't try. FreeBSD-4.1.0 added per-vty support, fixed the destructivness of the "destructive" cursor, and improved APIs. Start using the new APIs, support all of their capabilities, and document all of the capabilities and some of the historical mistakes. vt doesn't support any of this before or after the change. Fix minor unrelated bitrot in the usage message for the syscons case.
691 lines
15 KiB
Groff
691 lines
15 KiB
Groff
.\"
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.\" vidcontrol - a utility for manipulating the syscons or vt video driver
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" @(#)vidcontrol.1
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.\" $FreeBSD$
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.\"
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.Dd January 19, 2016
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.Dt VIDCONTROL 1
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.Os
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.Sh NAME
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.Nm vidcontrol
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.Nd system console control and configuration utility
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.Sh SYNOPSIS
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.Nm
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.Op Fl CdLHPpx
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.Op Fl b Ar color
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.Op Fl c Ar appearance
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.Oo
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.Fl f
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.Oo
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.Op Ar size
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.Ar file
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.Oc
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.Oc
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.Op Fl g Ar geometry
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.Op Fl h Ar size
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.Op Fl i Cm active | adapter | mode
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.Op Fl l Ar screen_map
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.Op Fl M Ar char
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.Op Fl m Cm on | off
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.Op Fl r Ar foreground Ar background
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.Op Fl S Cm on | off
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.Op Fl s Ar number
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.Op Fl T Cm xterm | cons25
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.Op Fl t Ar N | Cm off
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.Op Ar mode
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.Op Ar foreground Op Ar background
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.Op Cm show
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.Sh DESCRIPTION
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The
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.Nm
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utility is used to set various options for the
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.Xr syscons 4
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or
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.Xr vt 4
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console driver,
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such as video mode, colors, cursor shape, screen output map, font and screen
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saver timeout.
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Only a small subset of options is supported by
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.Xr vt 4 .
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Unsupported options lead to error messages, typically including
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the text "Inappropriate ioctl for device".
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.Pp
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The following command line options are supported:
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.Bl -tag -width indent
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.It Ar mode
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Select a new video mode.
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The modes currently recognized are:
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.Ar 80x25 ,
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.Ar 80x30 ,
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.Ar 80x43 ,
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.Ar 80x50 ,
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.Ar 80x60 ,
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.Ar 132x25 ,
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.Ar 132x30 ,
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.Ar 132x43 ,
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.Ar 132x50 ,
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.Ar 132x60 ,
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.Ar VGA_40x25 ,
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.Ar VGA_80x25 ,
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.Ar VGA_80x30 ,
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.Ar VGA_80x50 ,
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.Ar VGA_80x60 ,
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.Ar VGA_90x25 ,
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.Ar VGA_90x30 ,
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.Ar VGA_90x43 ,
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.Ar VGA_90x50 ,
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.Ar VGA_90x60 ,
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.Ar EGA_80x25 ,
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.Ar EGA_80x43 ,
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.Ar VESA_132x25 ,
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.Ar VESA_132x43 ,
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.Ar VESA_132x50 ,
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.Ar VESA_132x60 .
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.\"The graphic mode
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.\".Ar VGA_320x200
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.\"and
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The raster text mode
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.Ar VESA_800x600
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can also be chosen.
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Alternatively, a mode can be specified with its number by using a mode name of
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the form
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.Li MODE_ Ns Aq Ar NUMBER .
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A list of valid mode numbers can be obtained with the
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.Fl i Cm mode
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option.
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See
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.Sx Video Mode Support
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below.
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.It Ar foreground Op Ar background
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Change colors when displaying text.
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Specify the foreground color
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(e.g.\&
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.Dq vidcontrol white ) ,
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or both a foreground and background colors
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(e.g.\&
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.Dq vidcontrol yellow blue ) .
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Use the
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.Cm show
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command below to see available colors.
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.It Cm show
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See the supported colors on a given platform.
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.It Fl b Ar color
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Set border color to
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.Ar color .
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This option may not be always supported by the video driver.
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.It Fl C
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Clear the history buffer.
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.It Fl c Ar setting Ns Op , Ns Ar setting ...
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Change the cursor appearance.
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The change is specified by a non-empty comma-separated list of
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.Cm setting Ns s .
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Each
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.Cm setting
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overrides or modifies previous ones in left to right order.
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.Pp
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The following override
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.Cm setting Ns s
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are available:
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.Bl -tag -width indent
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.It Cm block
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Set to a block covering 1 character cell,
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with a configuration-dependent coloring
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that should be at worst inverse video.
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.It Cm blinkingblock
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Set to a blinking
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.Cm block .
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.It Cm underline
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Set to
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.Cm height
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scanlines starting at
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.Cm base .
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This only gives an underline in normal configurations.
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.It Cm blinkingunderline
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Set to a blinking
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.Cm underline .
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.It Cm base Ns = Ns Ar value, Cm height Ns = Ns Ar value
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Set the specified scanline parameters.
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These parameters are only active in so-called
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.Cm char ( underline )
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mode.
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.Cm value
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is an integer in any base supported by
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.Xr strtol 3 .
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Setting
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.Cm height
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to 0 turns off the cursor in
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.Cm char
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mode.
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Negative
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.Ar value Ns s
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are silently ignored.
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Positive
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.Ar value Ns s
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are clamped to fit in the character cell when the cursor is drawn.
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.El
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.Pp
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The following override
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.Cm setting Ns s
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are provided for backwards compatibility:
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.Bl -tag -width indent
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.It Cm normal
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Old name for
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.Cm block .
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.It Cm blink
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Old name for
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.Cm blinkingblock .
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.It Cm destructive
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Bad old name for
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.Cm blinkingunderline .
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The so-called
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.Cm destructive
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cursor was only destructive due to a bug that was fixed in
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.Fx 4.1.0 .
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The destruction in the non-blinking case was so large that
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this case was not supported by
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.Nm ,
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so no backwards compatible name is needed for this case.
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.El
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.Pp
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The following modifier
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.Cm setting Ns s
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are available:
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.Bl -tag -width indent
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.It Cm blinking , noblinking
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Set or clear the blinking attribute.
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.It Cm char , nochar
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Set or clear the so-called
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.Cm char
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attribute.
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Names in this section follow the bad old names of
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flags in the implementation.
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.Cm char
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now means
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.Do
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activate the scanline parameters,
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and implement them using the best available method
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(at worst, actually use the old
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.Cm char
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method with its destruction fixed if it is configured,
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else silently ignore this flag).
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.Dc
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.It Cm hidden , nohidden
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Set or clear the hidden attribute.
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.It Cm local
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Apply the changes (except for the
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.Cm local
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and
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.Cm reset
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control flags)
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to the current vty.
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The default is to apply them to all vtys.
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.It Cm reset
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Reset everything.
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The default is to not reset.
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When the
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.Cm local
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parameter is specified, the resetting is for the
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current local settings to the current global settings.
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Otherwise, the resetting is for the current global
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settings to defaults configured a boot time.
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Beware that the scanline parameters and not automatically
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scaled by the font size and resetting tends to undo manual
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fixups for this.
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.El
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.It Fl d
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Print out current output screen map.
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.It Xo
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.Fl f
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.Oo
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.Op Ar size
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.Ar file
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.Oc
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.Xc
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Load font
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.Ar file
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for
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.Ar size
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(currently, only
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.Cm 8x8 ,
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.Cm 8x14
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or
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.Cm 8x16 ) .
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The font file can be either uuencoded or in raw binary format.
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You can also use the menu-driven
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.Xr vidfont 1
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command to load the font of your choice.
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.Pp
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.Ar Size
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may be omitted, in this case
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.Nm
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will try to guess it from the size of font file.
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.Pp
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When using
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.Xr vt 4
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both
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.Ar size
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and
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.Ar font
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can be omitted, and the default font will be loaded.
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.Pp
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Note that older video cards, such as MDA and CGA, do not support
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software font.
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See also
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.Sx Video Mode Support
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and
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.Sx EXAMPLES
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below and the man page for either
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.Xr syscons 4
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or
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.Xr vt 4
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(depending on which driver you use).
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.It Fl g Ar geometry
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Set the
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.Ar geometry
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of the text mode for the modes with selectable
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geometry.
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Currently only raster modes, such as
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.Ar VESA_800x600 ,
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support this option.
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See also
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.Sx Video Mode Support
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and
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.Sx EXAMPLES
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below.
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.It Fl h Ar size
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Set the size of the history (scrollback) buffer to
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.Ar size
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lines.
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.It Fl i Cm active
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Shows the active vty number.
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.It Fl i Cm adapter
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Shows info about the current video adapter.
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.It Fl i Cm mode
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Shows the possible video modes with the current video hardware.
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.It Fl l Ar screen_map
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Install screen output map file from
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.Ar screen_map .
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See also
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.Xr syscons 4
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or
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.Xr vt 4
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(depending on which driver you use).
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.It Fl L
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Install default screen output map.
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.It Fl M Ar char
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Sets the base character used to render the mouse pointer to
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.Ar char .
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.It Fl m Cm on | off
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Switch the mouse pointer
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.Cm on
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or
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.Cm off .
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Used together with the
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.Xr moused 8
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daemon for text mode cut & paste functionality.
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.It Fl p
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Capture the current contents of the video buffer corresponding
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to the terminal device referred to by standard input.
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The
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.Nm
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utility writes contents of the video buffer to the standard
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output in a raw binary format.
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For details about that
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format see
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.Sx Format of Video Buffer Dump
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below.
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.It Fl P
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Same as
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.Fl p ,
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but dump contents of the video buffer in a plain text format
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ignoring nonprintable characters and information about text
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attributes.
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.It Fl H
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When used with
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.Fl p
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or
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.Fl P ,
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it instructs
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.Nm
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to dump full history buffer instead of visible portion of
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the video buffer only.
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.It Fl r Ar foreground background
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Change reverse mode colors to
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.Ar foreground
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and
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.Ar background .
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.It Fl S Cm on | off
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Turn vty switching on or off.
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When vty switching is off,
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attempts to switch to a different virtual terminal will fail.
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(The default is to permit vty switching.)
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This protection can be easily bypassed when the kernel is compiled with
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the
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.Dv DDB
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option.
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However, you probably should not compile the kernel debugger on a box which
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is supposed to be physically secure.
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.It Fl s Ar number
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Set the active vty to
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.Ar number .
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.It Fl T Cm xterm | cons25
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Switch between xterm and cons25 style terminal emulation.
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.It Fl t Ar N | Cm off
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Set the screensaver timeout to
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.Ar N
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seconds, or turns it
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.Cm off .
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.It Fl x
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Use hexadecimal digits for output.
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.El
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.Ss Video Mode Support
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Note that not all modes listed above may be supported by the video
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hardware.
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You can verify which mode is supported by the video hardware, using the
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.Fl i Cm mode
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option.
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.Pp
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The VESA BIOS support must be linked to the kernel
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or loaded as a KLD module if you wish to use VESA video modes
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or 132 column modes
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(see
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.Xr vga 4 ) .
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.Pp
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You need to compile your kernel with the
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.Ar VGA_WIDTH90
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option if you wish to use VGA 90 column modes
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(see
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.Xr vga 4 ) .
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.Pp
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Video modes other than 25 and 30 line modes may require specific size of font.
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Use
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.Fl f
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option above to load a font file to the kernel.
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If the required size of font has not been loaded to the kernel,
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.Nm
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will fail if the user attempts to set a new video mode.
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.Pp
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.Bl -column "25 line modes" "8x16 (VGA), 8x14 (EGA)" -compact
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.Sy Modes Ta Sy Font size
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.No 25 line modes Ta 8x16 (VGA), 8x14 (EGA)
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.No 30 line modes Ta 8x16
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.No 43 line modes Ta 8x8
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.No 50 line modes Ta 8x8
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.No 60 line modes Ta 8x8
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.El
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.Pp
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It is better to always load all three sizes (8x8, 8x14 and 8x16)
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of the same font.
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.Pp
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You may set variables in
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.Pa /etc/rc.conf
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or
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.Pa /etc/rc.conf.local
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so that desired font files will be automatically loaded
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when the system starts up.
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See below.
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.Pp
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If you want to use any of the raster text modes you need to recompile your
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kernel with the
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.Dv SC_PIXEL_MODE
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option.
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See
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.Xr syscons 4
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or
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.Xr vt 4
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(depending on which driver you use)
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for more details on this kernel option.
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.Ss Format of Video Buffer Dump
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The
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.Nm
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utility uses the
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.Xr syscons 4
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.\" is it supported on vt(4)???
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or
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.Xr vt 4
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.Dv CONS_SCRSHOT
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.Xr ioctl 2
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to capture the current contents of the video buffer.
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The
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.Nm
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utility writes version and additional information to the standard
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output, followed by the contents of the video buffer.
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.Pp
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VGA video memory is typically arranged in two byte tuples,
|
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one per character position.
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In each tuple, the first byte will be the character code,
|
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and the second byte is the character's color attribute.
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.Pp
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|
The VGA color attribute byte looks like this:
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.Bl -column "X:X" "<00000000>" "width" "bright foreground color"
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.Sy "bits# width meaning"
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.Li "7 <X0000000> 1 character blinking"
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.Li "6:4 <0XXX0000> 3 background color"
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.Li "3 <0000X000> 1 bright foreground color"
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.Li "2:0 <00000XXX> 3 foreground color"
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.El
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.Pp
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Here is a list of the three bit wide base colors:
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.Pp
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.Bl -hang -offset indent -compact
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.It 0
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Black
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.It 1
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Blue
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.It 2
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Green
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.It 3
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Cyan
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.It 4
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Red
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.It 5
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Magenta
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.It 6
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Brown
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.It 7
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Light Grey
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.El
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.Pp
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|
Base colors with bit 3 (the bright foreground flag) set:
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.Pp
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|
.Bl -hang -offset indent -compact
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.It 0
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|
Dark Grey
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.It 1
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Light Blue
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.It 2
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Light Green
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.It 3
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Light Cyan
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.It 4
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Light Red
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.It 5
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Light Magenta
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.It 6
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Yellow
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.It 7
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White
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.El
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.Pp
|
|
For example, the two bytes
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.Pp
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|
.Dl "65 158"
|
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.Pp
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|
specify an uppercase A (character code 65), blinking
|
|
(bit 7 set) in yellow (bits 3:0) on a blue background
|
|
(bits 6:4).
|
|
.Pp
|
|
The
|
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.Nm
|
|
output contains a small header which includes additional
|
|
information which may be useful to utilities processing
|
|
the output.
|
|
.Pp
|
|
The first 10 bytes are always arranged as follows:
|
|
.Bl -column "Byte range" "Contents" -offset indent
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.It Sy "Byte Range Contents"
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.It "1 thru 8 Literal text" Dq Li SCRSHOT_
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.It "9 File format version number"
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.It "10 Remaining number of bytes in the header"
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.El
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.Pp
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|
Subsequent bytes depend on the version number.
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|
.Bl -column "Version" "13 and up" -offset indent
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|
.It Sy "Version Byte Meaning"
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.It "1 11 Terminal width, in characters"
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.It " 12 Terminal depth, in characters"
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.It " 13 and up The snapshot data"
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.El
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.Pp
|
|
So a dump of an 80x25 screen would start (in hex)
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|
.Bd -literal -offset indent
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|
53 43 52 53 48 4f 54 5f 01 02 50 19
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----------------------- -- -- -- --
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| | | | ` 25 decimal
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| | | `--- 80 decimal
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| | `------ 2 remaining bytes of header data
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| `--------- File format version 1
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`------------------------ Literal "SCRSHOT_"
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.Ed
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.Sh VIDEO OUTPUT CONFIGURATION
|
|
.Ss Boot Time Configuration
|
|
You may set the following variables in
|
|
.Pa /etc/rc.conf
|
|
or
|
|
.Pa /etc/rc.conf.local
|
|
in order to configure the video output at boot time.
|
|
.Pp
|
|
.Bl -tag -width foo_bar_var -compact
|
|
.It Ar blanktime
|
|
Sets the timeout value for the
|
|
.Fl t
|
|
option.
|
|
.It Ar font8x16 , font8x14 , font8x8
|
|
Specifies font files for the
|
|
.Fl f
|
|
option.
|
|
.It Ar scrnmap
|
|
Specifies a screen output map file for the
|
|
.Fl l
|
|
option.
|
|
.El
|
|
.Pp
|
|
See
|
|
.Xr rc.conf 5
|
|
for more details.
|
|
.Ss Driver Configuration
|
|
The video card driver may let you change default configuration
|
|
options, such as the default font, so that you do not need to set up
|
|
the options at boot time.
|
|
See video card driver manuals, (e.g.\&
|
|
.Xr vga 4 )
|
|
for details.
|
|
.Sh FILES
|
|
.Bl -tag -width /usr/share/syscons/scrnmaps/foo-bar -compact
|
|
.It Pa /usr/share/syscons/fonts/*
|
|
.It Pa /usr/share/vt/fonts/*
|
|
font files.
|
|
.It Pa /usr/share/syscons/scrnmaps/*
|
|
screen output map files (relevant for
|
|
.Xr syscons 4
|
|
only).
|
|
.El
|
|
.Sh EXAMPLES
|
|
If you want to load
|
|
.Pa /usr/share/syscons/fonts/iso-8x16.fnt
|
|
to the kernel, run
|
|
.Nm
|
|
as:
|
|
.Pp
|
|
.Dl vidcontrol -f 8x16 /usr/share/syscons/fonts/iso-8x16.fnt
|
|
.Pp
|
|
So long as the font file is in
|
|
.Pa /usr/share/syscons/fonts
|
|
(if using syscons) or
|
|
.Pa /usr/share/vt/fonts
|
|
(if using vt),
|
|
you may abbreviate the file name as
|
|
.Pa iso-8x16 :
|
|
.Pp
|
|
.Dl vidcontrol -f 8x16 iso-8x16
|
|
.Pp
|
|
Furthermore, you can also omit font size
|
|
.Dq Li 8x16 :
|
|
.Pp
|
|
.Dl vidcontrol -f iso-8x16
|
|
.Pp
|
|
Moreover, the suffix specifying the font size can be also omitted; in
|
|
this case,
|
|
.Nm
|
|
will use the size of the currently displayed font to construct the
|
|
suffix:
|
|
.Pp
|
|
.Dl vidcontrol -f iso
|
|
.Pp
|
|
Likewise, you can also abbreviate the screen output map file name for
|
|
the
|
|
.Fl l
|
|
option if the file is found in
|
|
.Pa /usr/share/syscons/scrnmaps .
|
|
.Pp
|
|
.Dl vidcontrol -l iso-8859-1_to_cp437
|
|
.Pp
|
|
The above command will load
|
|
.Pa /usr/share/syscons/scrnmaps/iso-8859-1_to_cp437.scm .
|
|
.Pp
|
|
The following command will set-up a 100x37 raster text mode (useful for
|
|
some LCD models):
|
|
.Pp
|
|
.Dl vidcontrol -g 100x37 VESA_800x600
|
|
.Pp
|
|
The following command will capture the contents of the first virtual
|
|
terminal video buffer, and redirect the output to the
|
|
.Pa shot.scr
|
|
file:
|
|
.Pp
|
|
.Dl vidcontrol -p < /dev/ttyv0 > shot.scr
|
|
.Pp
|
|
The following command will dump contents of the fourth virtual terminal
|
|
video buffer
|
|
to the standard output in the human readable format:
|
|
.Pp
|
|
.Dl vidcontrol -P < /dev/ttyv3
|
|
.Sh SEE ALSO
|
|
.Xr kbdcontrol 1 ,
|
|
.Xr vidfont 1 ,
|
|
.Xr keyboard 4 ,
|
|
.Xr screen 4 ,
|
|
.Xr syscons 4 ,
|
|
.Xr vga 4 ,
|
|
.Xr vt 4 ,
|
|
.Xr rc.conf 5 ,
|
|
.Xr kldload 8 ,
|
|
.Xr moused 8 ,
|
|
.Xr watch 8
|
|
.Pp
|
|
The various
|
|
.Pa scr2*
|
|
utilities in the
|
|
.Pa graphics
|
|
and
|
|
.Pa textproc
|
|
categories of the
|
|
.Em "Ports Collection" .
|
|
.Sh AUTHORS
|
|
.An S\(/oren Schmidt Aq Mt sos@FreeBSD.org
|
|
.An Sascha Wildner Aq Mt saw@online.de
|
|
.Sh CONTRIBUTORS
|
|
.An -split
|
|
.An Maxim Sobolev Aq Mt sobomax@FreeBSD.org
|
|
.An Nik Clayton Aq Mt nik@FreeBSD.org
|