VDU	8	H	0	Move the text cursor one character position to
				the left.
VDU	9	I	0	Move the text cursor one character position to
				the right.
VDU	10	J	0	Move the text cursor down one line.
VDU	11	K	0	Move the text cursor up one line.
VDU	12	L	0	Clear the screen and restore the text cursor to
				position (0,0). (Equivalent to CLS).
VDU	13	M	0	Move the text cursor to the start of the
				current line.
VDU	14	N	0	Set page mode on (i.e. suspend output at the
				end of each full screen of output and wait for
				the user to depress [SHIFT]).
VDU	15	O	0	Set page mode off (i.e. allow unrestricted
				output).
VDU	16	P	0	Clear the current graphics area to the current
				graphics background colour. (Equivalent to
				CLG.)
VDU	17	Q	1	Change the foreground or background colour
				for subsequent text output (equivalent to
				COLOUR). In mode 5 (133), for example:
				VDU 17,2 sets the text foreground colour
				to Yellow.
				VDU 17,129 sets the text background colour
				to Red.
VDU	18	R	2	Change the foreground or background colours
				for subsequent graphics output and define the
				way in which it is to be placed on the screen
				(equivalent to GCOL). In mode 2 (130), for
				example:
				VDU 18,0,4 changes the graphics
				foreground colour to Blue.
				VDU 18,0, 134 changes the graphics
				background colour to Cyan.
App 7.2