Hi MOUNTAIN747.. why not just use GOTO statements? I think it's easier to do...
Code:
        DS1       VAR PortA.1   ;dip switch 
                 
        start:  
         If  DS1=1 then
	   goto tx_usb
         Else
	  goto tx_rs485
         EndIF

        tx_usb:
          Serout portc.6, 84 ["Transmitting USB"]
          goto start
   
        tx_rs485:
          Serout2 portc.5, 84 ["Transmitting RS485"]
          goto start
Adding PAUSE's can help...