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mapscrn(8)


NAME

   mapscrn - load screen output mapping table

SYNOPSIS

   mapscrn [-v] [-o map.orig] mapfile

DESCRIPTION

   The  mapscrn  command  is  obsolete - its function is now built-in into
   setfont.  However, for backwards compatibility it is still available as
   a separate command.

   The mapscrn command loads a user defined output character mapping table
   into the console driver. The console driver may be later put  into  use
   user-defined mapping table mode by outputting a special escape sequence
   to the console device.  This sequence is <esc>(K for the  G0  character
   set and <esc>)K for the G1 character set.  When the -o option is given,
   the old map is saved in map.orig.

USE

   There are two kinds of mapping tables: direct-to-font tables, that give
   a  font  position  for each user byte value, and user-to-unicode tables
   that give a unicode value for each user byte. The  corresponding  glyph
   is now found using the unicode index of the font.  The command
          mapscrn trivial
   sets  up  a  one-to-one  direct-to-font table where user bytes directly
   address the font. This is useful for fonts that are in the  same  order
   as the character set one uses.  A command like
          mapscrn 8859-2
   sets  up  a  user-to-unicode  table that assumes that the user uses ISO
   8859-2.

INPUT FORMAT

   The mapscrn command can read the map in either of two formats:
   1. 256 or 512 bytes binary data
   2. two-column text file
   Format (1) is a direct image of the translation  table.  The  256-bytes
   tables  are  direct-to-font,  the  512-bytes tables are user-to-unicode
   tables.  Format (2) is used to fill the table  as  follows:  cell  with
   offset mentioned in the first column is filled with the value mentioned
   in the second column.  When values larger than 255 occur, or values are
   written  using  the U+xxxx notation, the table is assumed to be a user-
   to-unicode table, otherwise it is a direct-to-font table.

   Values in the file may be specified in one of several formats:
   1. Decimal: String of decimal digits not starting with '0'
   2. Octal: String of octal digits beginning with '0'.
   3. Hexadecimal: String of hexadecimal digits preceded by "0x".
   4. Unicode: String of four hexadecimal digits preceded by "U+".
   5. Character: Single character enclosed  in  single  quotes.  (And  the
   binary  value  is used.)  Note that blank, comma, tab character and '#'
   cannot be specified with this format.
   6. UTF-8  Character:  Single  (possibly  multi-byte)  UTF-8  character,
   enclosed in single quotes.

   Note that control characters (with codes < 32) cannot be re-mapped with
   mapscrn because they have special meaning for the driver.

FILES

   /usr/share/consoletrans is the default directory for screen mappings.

SEE ALSO

   setfont(8)

AUTHOR

   Copyright (C) 1993 Eugene G. Crosser
   <crosser@pccross.msk.su>
   This software and documentation may be distributed freely.



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