Date   : Thu, 18 Jan 1996 22:22:17 +0000 (GMT)
From   : James Fidell <james@...>
Subject: Hold graphics teletext code

Here's the text of the Master Series Reference Manual, Part One,
page E.5-8 which covers this code :

    Teletext control codes are normally displayed as a space (ie.
    a block in the current background colour). This is normally
    satisfactory in lines of text output but in means that "holes" will
    be left in any lines of graphic output.

    Control code 158 causes control codes to be displayed as graphics
    characters; that chosen will be the nearest to the left of the
    control code on that line that has bit 6 set.

    If there is no suitable graphics character to 'hold' on the current
    line, or if any of control codes 129-135, 140-141, 145-151 or 159
    intervene, control codes will still be displayed as spaces. The hold
    graphics facility starts in the character position occupied by the
    control code. The hold graphics control code itself will also be
    displayed as the held graphic character if possible.


James.

-- 
 "Yield to temptation --             | Work: james@...          
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        - Lazarus Long               |              James Fidell