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FreeBSD/Linux/UNIX General Commands Manual
Hypertext Man Pages
scon
 
SCON(1) 		FreeBSD General Commands Manual 	       SCON(1)

NAME
     scon -- controls screen modes for pcvt video driver

SYNOPSIS
     scon [-a] [-c screenno] [-d device] [-f on|off] [-h] [-H] [-l] [-m] [-v]
	  [-V] [-s lines]
     scon [-v] [-d device] -p entry,red,green,blue
     scon [-v] [-d device] -p default
     scon [-v] [-d device] -p list
     scon [-v] -t timeout
     scon [-v] -1 | -8

DESCRIPTION
     The scon utility controls several aspects of the runtime behaviour of the
     pcvt vt220 driver.

     The options are as follows:

     -a      Returns a string describing the video adaptor found by pcvt, the
	     string returned could be MDA, HGC, CGA, EGA, VGA or UNKNOWN.

     -c      Specify the screen number the current (displayed) screen should
	     be switched to.

     -d      Specify the device filename (i.e., /dev/ttyv2) further operations
	     specified on the command line should be applied to.

     -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 -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.

     -h      Prints a usage/help text.

     -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.

     -m      Returns a string describing the connected display monitor type
	     found by pcvt, the string returned can be MONO, COLOR or UNKNOWN.

     -v      Specify verbose operation of the program.

     -V      Switch the specified/current screen into a pure VT220 mode with-
	     out recognizing any HP escape sequences and without displaying
	     function key labels.

     -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.

     -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.

     -p      Modify VGA palette (DAC).	The -p is mutually exclusive with -s,
	     -H, and -V.  Naturally, option -p is available only for VGA
	     boards.  Three flavors are available.

	     If used with argument ``default'', this flag will restore the
	     default palette (as installed by VGA ROM BIOS after hardware
	     reset).

	     If used with argument ``list'', the current VGA DAC palette
	     entries are listed.  Each entry contains the table index, values
	     for red, green, and blue, and if there is 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 (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 argu-
	     ment may be a colon ``:'' instead of a comma ``,'' for better
	     readability, but this violates common command argument conven-
	     tions.  Multiple -p options may be specified if unambiguous.

     -t      Specifying -t will activate the screen saver.  The behaviour
	     depends on timeout: if timeout is given as 0, the screen saver is
	     turned off.  Otherwise, timeout is taken as a number of seconds
	     to wait until activating the screen saver.  NOTE: the -t option
	     is only available if screen saver support has been compiled into
	     the driver!

     -1      Sets 132 columns mode (only available on VGA adaptors).

     -8      Sets 80 columns mode.

     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.

EXAMPLES
     The command ``scon -H -s 28'' places the current screen into HP mode and
     sets the screen size to 28x80.

     Invoking ``scon -p lightgray,0,15,0 -p 0:45,45,45'' 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.

SEE ALSO
     cursor(1), loadfont(1), pcvt(4)

BUGS
     the -c and -d options collide somehow, this will change in a future
     release.

FreeBSD 6.1			March 27, 2000			   FreeBSD 6.1
=11739
+8
(3)