INT 10 - VIDEO - Hercules GRAFIX - "PLOT" - DRAW ONE PIXEL

	AH = 46h
	DI = x (0-719)
	BP = y (0-347)
Return: nothing
Notes:	function 44h determines operation and function 43h which page to use
	if the indicated coordinate is invalid, this function does nothing
SeeAlso: AH=0Ch,AH=47h,AH=49h,AH=4Ch,AH=4Dh