SUBROUTINE RTERM

 RTERM is designed to be similar to the  CTERM routine but for use with the Ramtek. It is a dummy call when not in  Ramtek plotting mode. When using the  REF package, it calls REFDIS.

CALL RTERM (iarg)

iarg (I): operation code
          = 0 : clear Ramtek screen
          = 2 : ask if clear screen desired. 
                reply should be: "Y" or "N".  Default is "N".
                NOTE: a reply of "Q" will execute RTERM(3).
                a reply of "S" will close channel and stop
                Ramtek plotting until next RTERM(2) (see CTERM)
          =-2 : clear Ramtek screen
          = 3 : close Ramtek plotting (closes old channel)
          =-3 : reopen Ramtek plotting (opens new channel--does
                not reinitalize Ramtek plotting package)
          =-4 : clear Ramtek screen