INT F7 - FSBBS 2.0 - PASSDATA BUFFER                                            
	AH = 04h
	AL = function
	    00h get PassData buffer contents
		DS:DX -> buffer for PassData contents
		Return: DS:DX buffer filled
	    01h set PassData contents
		DS:DX -> buffer containing new PassData
		CH = length of data in buffer
		Return: nothing