INT 61 - Atari Portfolio - GET/SET VIRTUAL SCREEN POSITION                      
	AH = 10h
	AL = function
	    00h get position
		Return: DH,DL = current row,column
	    01h set position
		DH = row
		DL = column
Desc:	get or specify the upper-left corner of the 40x8 window into the
	  logical screen
SeeAlso: AH=00h"Portfolio",AH=0Eh"Portfolio",AH=0Fh"Portfolio"
SeeAlso: AH=11h"Portfolio"