Standard output

Hello list!
Normally, when I call the function sys_write on standard output, I
write one ore more character on the screen in the position next
to the last character printed.
I am writing a program that wishes to clean the screen, to print a character
in a fixed position no the screen (x, y) and to modify the characters and
background colors.
What funcionts I have to call in order to have a better controll of the
standard output?

Thanks a lot for every suggestion.
-- 
With regards,


					HIToC
					[email protected]