INT 10,1 - Set Cursor Type

	AH = 01
	CH = cursor starting scan line (cursor top) (low order 5 bits)
	CL = cursor ending scan line (cursor bottom) (low order 5 bits)


	returns nothing


	- cursor scan lines are zero based
	- cursor size can also be set via the 6845 CRT controller
	- cursor size can be determined using the CRTC,  INT 10,3  or the
	  BIOS Data Area bytes 40:60 (ending scan line) and 40:61 (starting
	  scan line)
	- the following is a list of the cursor scan lines associated with
	  most common adapters;  screen sizes over 40 lines may differ
	  depending on adapters.

		Line	 Starting     Ending	  Character
	Video	Count	 Scan Line    Scan Line   Point Size

	CGA	 25	    06		 07	      08
	MDA	 25	    0B		 0C	      0E
	EGA	 25	    06		 07	      0E
	EGA	 43	  04/06 	 07	      08
	VGA	 25	    0D		 0E	      10
	VGA	 40	    08		 09	      0A
	VGA	 50	    06		 07	      08

	- use CX = 2000h to disable cursor