1 ! PT, PTA, PTB expansion for external symbols. 2 start: 3 pt externalsym1 + 40,tr5 4 pta externalsym2 + 44,tr4 5 ptb externalsym3 + 48,tr3 6 pt/u externalsym4 + 52,tr5 7 pta/u externalsym5 + 56,tr4 8 ptb/u externalsym6 + 60,tr3 9
