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-.\" Copyright (c) 1992,1993,1994 Hellmuth Michaelis and Joerg Wunsch
-.\"
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\" notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\" notice, this list of conditions and the following disclaimer in the
-.\" documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\" must display the following acknowledgement:
-.\" This product includes software developed by
-.\" Hellmuth Michaelis and Joerg Wunsch
-.\" 4. The name authors may not be used to endorse or promote products
-.\" derived from this software without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
-.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
-.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
-.\" IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
-.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
-.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-.\"
-.\" @(#)scon.1, 3.00, Last Edit-Date: [Mon Jan 10 21:30:48 1994]
-.\"
-.Dd December 31, 1993
-.Dt SCON 1
-.Sh NAME
-.Nm scon
-.Nd controls screen modes for pcvt video driver
-.Sh SYNOPSIS
-.Nm scon
-.Op Fl a
-.Op Fl c Ar screenno
-.Op Fl d Ar device
-.Op Fl f Ar on|off
-.Op Fl h
-.Op Fl H
-.Op Fl l
-.Op Fl m
-.Op Fl v
-.Op Fl V
-.Op Fl s Ar lines
-.br
-.Nm scon
-.Op Fl v
-.Op Fl d Ar device
-.Fl p Ar entry,red,green,blue
-.br
-.Nm scon
-.Op Fl v
-.Op Fl d Ar device
-.Fl p Ar default
-.br
-.Nm scon
-.Op Fl v
-.Op Fl d Ar device
-.Fl p Ar list
-.Nm scon
-.Op Fl v
-.Fl t Ar timeout
-.Nm scon
-.Op Fl v
-.Fl 1 | Fl 8
-.Sh DESCRIPTION
-The
-.Nm scon
-utility controls several aspects of the runtime behaviour of the pcvt vt220
-driver.
-.Pp
-The options are as follows:
-.Bl -tag -width Ds
-.It Fl a
-Returns a string describing the video adaptor found by pcvt, the string
-returned could be MDA, HGC, CGA, EGA, VGA or UNKNOWN.
-.It Fl c
-Specify the screen number the current (displayed) screen should be switched
-to.
-.It Fl d
-Specify the device filename (i.e. /dev/ttyv2) further operations specified on
-the command line should be applied to.
-.It Fl f
-Some programs which silently assume 24 lines when they run on a VT220 show
-incorrect behaviour when the terminal has really 25 lines. To support full
-VT220 behaviour, it is possible to force pcvt to select only 24 lines when
-it is running in 25-lines pure VT mode and/or in 28-lines HP-mode. The
-.Fl f
-option requires one additional parameter, the string 'on' or 'off' to switch
-this mode for a virtual screen on or off respectively. This mode has no effect
-if any other vertical resolutions are selected than the two above mentioned.
-.It Fl h
-Prints a usage/help text.
-.It Fl l
-Lists the current configuration of runtime changeable options and fixed
-parameters (such as the type of the adaptor, and in case of a VGA adaptor,
-the Manufacturer, Chipset and 132 column support) of the output portion
-of the pcvt driver.
-.It Fl m
-Returns a string describing the connected display monitor type found by pcvt,
-the string returned can be MONO, COLOR or UNKNOWN.
-.It Fl v
-Specify verbose operation of the program.
-.It Fl V
-Switch the specified/current screen into a pure VT220 mode without recognizing
-any HP escape sequences and without displaying function key labels.
-.It Fl H
-Switch the specified/current screen into a mixed HP/VT220 mode. That is, that
-in addition to the full VT220 emulation, the HP function key labels and the
-escape sequences for handling the labels are available to the user.
-.It Fl s
-Specify the number of character lines on the screen. Possible parameters are
-25, 28, 35, 40, 43 or 50. To use all this screen sizes, the fonts required
-for proper operation of a desired size have to be downloaded to the EGA/VGA
-font ram. This option is available only for EGA and VGA boards.
-.It Fl p
-Modify VGA palette
-.Pq DAC .
-The
-.Fl p
-is mutually exclusive with
-.Fl s ,
-.Fl H ,
-and
-.Fl V .
-Naturally, option
-.Fl p
-is available only for VGA boards. Three flavors are available.
-
-If used with argument
-.Dq Ar default ,
-this flag will restore the default palette
-.Po
-as installed by VGA ROM BIOS after hardware reset
-.Pc .
-
-If used with argument
-.Dq Ar list ,
-the current VGA DAC palette entries are listed. Each entry contains
-the table index, values for red, green, and blue, and if there's a
-known name for this entry, the color name. Trailing empty table
-slots (RGB values all zero) are omitted.
-
-Otherwise, four comma-separated arguments are expected. The first
-denotes the number of palette entry to be modified. This may be either
-a number between 0 and 255, or the usual name of an associated color
-.Pq case-insensitive .
-The following values for red, green and blue are restricted to 0 through 63
-due to VGA DAC conventions.
-Note that the first delimiter within such an argument may be a colon
-.Dq \&:
-instead of a comma
-.Dq \&,
-for better readability, but this violates common command argument
-conventions.
-Multiple
-.Fl p
-options may be specified if unambiguous.
-.It Fl t
-Specifying
-.Fl t
-will activate the screen saver. The behaviour depends on
-.Ar timeout :
-if
-.Ar timeout
-is given as 0, the screen saver is turned off. Otherwise,
-.Ar timeout
-is taken as a number of seconds to wait until activating the
-screen saver.
-NOTE: the
-.Fl t
-option is only available if screen saver support has been compiled into
-the driver !
-.It Fl 1
-Sets 132 columns mode
-.Pq only available on VGA adaptors .
-.It Fl 8
-Sets 80 columns mode.
-.El
-.Pp
-When switching between HP and VT mode, when switching the force 24 lines
-mode on and off, or when switching between 80 and 132 columns operation,
-the screen is cleared, the scrolling
-region is reset and the cursor is placed in the home position.
-.Sh EXAMPLES
-The command
-.Dq Li scon Fl H s Ar 28
-places the current screen into HP mode and sets the screen size to 28x80.
-
-Invoking
-.Do
-.Li scon Fl p
-.Ar lightgray,0,15,0
-.Fl p
-.Ar 0:45,45,45
-.Dc
-will result in green on gray output for normal text.
-Note that normal text color is light gray, and not white as one might expect.
-.Sh BUGS
-the
-.Fl c
-and
-.Fl d
-options collide somehow, this will change in a future release.
-.Sh SEE ALSO
-.Xr cursor 1 ,
-.Xr loadfont 1 ,
-.Xr pcvt 4
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