DOS Video functions

$Id$

video normal -- select normal video brightness
video dim -- select dim video brightness
video bright -- select bright video

video write data -- write data given the current video attributes for color,
intensity, etc.  Data can contain multiple lines.  However they must currently
be separated by carriage-return, linefeed (\r\n), not just linefeed.

video goto x y -- set the cursor to a specific location.  1,1 is the top
left corner.

video bgcolor n -- set the background color to an integer between 0 and 7
	0 = black
	1 = blue
	2 = green
	3 = cyan
	4 = red
	5 = magenta
	6 = brown
	7 = lightgray

video color n -- set the foreground color to an integer between 0 and 15
	0 = black
	1 = blue
	2 = green
	3 = cyan
	4 = red
	5 = magenta
	6 = brown
	7 = lightgray
	8 = darkgray
	9 = lightblue
	10 = lightgreen
	11 = lightcyan
	12 = lightred
	13 = lightmagenta
	14 = yellow
	15 = white

video color n blink -- set foreground color and blink it

Note that light colors (8-15) may not be defined for certain video hardware
and, if not, the card will fall back to the corresponding 0-7 color.

video clear -- Clear the screen, same as cls.

video direct -- get or set whether or not we write directly to video or
go through the BIOS.

video direct 1 -- Write directly to video memory.
video direct 0 -- Wite to the display through the BIOS.

video direct -- return the current status, 1 or 0.