225 lines
6.4 KiB
Groff
225 lines
6.4 KiB
Groff
.\" Copyright (c) 1992, 2000 Hellmuth Michaelis
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.\" Copyright (c) 1992, 1994 Joerg Wunsch
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.\"
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.\" All rights reserved.
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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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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" Last Edit-Date: [Mon Mar 27 17:17:50 2000]
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.\"
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.\" $FreeBSD$
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.\"
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.Dd March 27, 2000
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.Dt SCON 1
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.Sh NAME
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.Nm scon
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.Nd controls screen modes for pcvt video driver
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.Sh SYNOPSIS
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.Nm scon
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.Op Fl a
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.Op Fl c Ar screenno
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.Op Fl d Ar device
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.Op Fl f Ar on|off
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.Op Fl h
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.Op Fl H
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.Op Fl l
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.Op Fl m
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.Op Fl v
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.Op Fl V
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.Op Fl s Ar lines
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.br
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.Nm scon
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.Op Fl v
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.Op Fl d Ar device
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.Fl p Ar entry,red,green,blue
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.br
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.Nm scon
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.Op Fl v
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.Op Fl d Ar device
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.Fl p Ar default
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.br
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.Nm scon
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.Op Fl v
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.Op Fl d Ar device
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.Fl p Ar list
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.Nm scon
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.Op Fl v
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.Fl t Ar timeout
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.Nm scon
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.Op Fl v
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.Fl 1 | Fl 8
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.Sh DESCRIPTION
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The
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.Nm scon
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utility controls several aspects of the runtime behaviour of the pcvt vt220
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driver.
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.Pp
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The options are as follows:
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.Bl -tag -width Ds
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.It Fl a
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Returns a string describing the video adaptor found by pcvt, the string
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returned could be MDA, HGC, CGA, EGA, VGA or UNKNOWN.
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.It Fl c
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Specify the screen number the current (displayed) screen should be switched
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to.
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.It Fl d
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Specify the device filename (i.e. /dev/ttyv2) further operations specified on
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the command line should be applied to.
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.It Fl f
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Some programs which silently assume 24 lines when they run on a VT220 show
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incorrect behaviour when the terminal has really 25 lines.
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To support full
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VT220 behaviour, it is possible to force pcvt to select only 24 lines when
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it is running in 25-lines pure VT mode and/or in 28-lines HP-mode.
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The
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.Fl f
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option requires one additional parameter, the string 'on' or 'off' to switch
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this mode for a virtual screen on or off respectively.
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This mode has no effect
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if any other vertical resolutions are selected than the two above mentioned.
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.It Fl h
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Prints a usage/help text.
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.It Fl l
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Lists the current configuration of runtime changeable options and fixed
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parameters (such as the type of the adaptor, and in case of a VGA adaptor,
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the Manufacturer, Chipset and 132 column support) of the output portion
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of the pcvt driver.
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.It Fl m
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Returns a string describing the connected display monitor type found by pcvt,
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the string returned can be MONO, COLOR or UNKNOWN.
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.It Fl v
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Specify verbose operation of the program.
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.It Fl V
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Switch the specified/current screen into a pure VT220 mode without recognizing
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any HP escape sequences and without displaying function key labels.
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.It Fl H
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Switch the specified/current screen into a mixed HP/VT220 mode.
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That is, that
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in addition to the full VT220 emulation, the HP function key labels and the
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escape sequences for handling the labels are available to the user.
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.It Fl s
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Specify the number of character lines on the screen.
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Possible parameters are
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25, 28, 35, 40, 43 or 50. To use all this screen sizes, the fonts required
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for proper operation of a desired size have to be downloaded to the EGA/VGA
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font ram.
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This option is available only for EGA and VGA boards.
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.It Fl p
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Modify VGA palette
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.Pq DAC .
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The
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.Fl p
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is mutually exclusive with
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.Fl s ,
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.Fl H ,
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and
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.Fl V .
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Naturally, option
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.Fl p
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is available only for VGA boards.
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Three flavors are available.
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If used with argument
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.Dq Ar default ,
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this flag will restore the default palette
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.Po
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as installed by VGA ROM BIOS after hardware reset
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.Pc .
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If used with argument
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.Dq Ar list ,
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the current VGA DAC palette entries are listed.
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Each entry contains
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the table index, values for red, green, and blue, and if there's a
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known name for this entry, the color name.
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Trailing empty table
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slots (RGB values all zero) are omitted.
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Otherwise, four comma-separated arguments are expected.
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The first
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denotes the number of palette entry to be modified.
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This may be either
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a number between 0 and 255, or the usual name of an associated color
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.Pq case-insensitive .
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The following values for red, green and blue are restricted to 0 through 63
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due to VGA DAC conventions.
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Note that the first delimiter within such an argument may be a colon
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.Dq \&:
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instead of a comma
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.Dq \&,
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for better readability, but this violates common command argument
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conventions.
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Multiple
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.Fl p
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options may be specified if unambiguous.
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.It Fl t
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Specifying
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.Fl t
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will activate the screen saver.
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The behaviour depends on
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.Ar timeout :
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if
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.Ar timeout
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is given as 0, the screen saver is turned off.
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Otherwise,
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.Ar timeout
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is taken as a number of seconds to wait until activating the
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screen saver.
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NOTE: the
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.Fl t
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option is only available if screen saver support has been compiled into
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the driver !
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.It Fl 1
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Sets 132 columns mode
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.Pq only available on VGA adaptors .
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.It Fl 8
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Sets 80 columns mode.
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.El
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.Pp
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When switching between HP and VT mode, when switching the force 24 lines
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mode on and off, or when switching between 80 and 132 columns operation,
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the screen is cleared, the scrolling
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region is reset and the cursor is placed in the home position.
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.Sh EXAMPLES
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The command
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.Dq Li scon Fl H s Ar 28
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places the current screen into HP mode and sets the screen size to 28x80.
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Invoking
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.Do
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.Li scon Fl p
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.Ar lightgray,0,15,0
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.Fl p
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.Ar 0:45,45,45
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.Dc
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will result in green on gray output for normal text.
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Note that normal text color is light gray, and not white as one might expect.
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.Sh BUGS
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the
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.Fl c
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and
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.Fl d
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options collide somehow, this will change in a future release.
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.Sh SEE ALSO
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.Xr cursor 1 ,
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.Xr loadfont 1 ,
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.Xr pcvt 4
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