INT 61 - Atari Portfolio - GET/SET CURSOR MODE                                  
	AH = 0Fh
	AL = function
	    00h get mode
	    01h set mode
		BL = new cursor mode
			00h cursor off
			01h underline
			02h block
	    02h force mode (set size to reflect NumLock state)
Return: BL = current/old cursor mode
SeeAlso: AH=00h"Portfolio",AH=0Eh"Portfolio",AH=10h"Portfolio",INT 10/AH=01h