SUBROUTINE ENTER  
    
      INTEGER     NSIZE,  NAME(16), NTITLE  
      INTEGER     NFLAGS (512)  
      INTEGER     NADDRS (512)  
      INTEGER     NPOSIT (512)  
      INTEGER     NDATA  (512)  
      INTEGER     NTEXTX (512)  
      INTEGER     NTEXT  (1000) 
      INTEGER     NLX, NLSTRT, NLSTOP   
      INTEGER     TXSTRT, TXSTOP
      INTEGER     NTXBTS
      INTEGER     USEBIT, COMBIT, OVLBIT, EPTBIT
      INTEGER     LDMBIT, MODBIT, MLTBIT, RLSBIT
      INTEGER     GDFBIT, TYPBTS
      INTEGER     ATYPE 
      INTEGER      ICLP07   
      LOGICAL     OLDNAM
      COMMON      /NTABLE/ NSIZE, NAME, NTITLE  
      COMMON      /NTABLE/ NFLAGS, NADDRS, NPOSIT, NDATA, NTEXTX
      COMMON      /NTABLE/ NTEXT
      COMMON      /NTABLE/ NLX, NLSTRT, NLSTOP  
      COMMON      /NTABLE/ TXSTRT, TXSTOP   
      COMMON      /NTABLE/ NTXBTS   
      COMMON      /NTABLE/ USEBIT, COMBIT, OVLBIT, EPTBIT   
      COMMON      /NTABLE/ LDMBIT, MODBIT, MLTBIT, RLSBIT   
      COMMON      /NTABLE/ GDFBIT, TYPBTS   
      COMMON      /NTABLE/ ATYPE
      COMMON      /NTABLE/ ICLP07   
      COMMON      /NTABLE/ OLDNAM   
    
      INTEGER     DICT (400)
      INTEGER     ID, CID, DTSTRT, DTSTOP   
      COMMON      /DARRAY/ DICT 
      COMMON      /DARRAY/ ID, CID, DTSTRT, DTSTOP  
    
      INTEGER     ECODE 
      INTEGER     CMCHAN
      INTEGER     RBCHAN
      INTEGER     OBCHAN
      INTEGER     MPCHAN
      INTEGER     DBCHAN
      INTEGER     TTYIN 
      INTEGER     TTYOUT
      COMMON      /IODEFN/ ECODE
      COMMON      /IODEFN/ CMCHAN   
      COMMON      /IODEFN/ RBCHAN   
      COMMON      /IODEFN/ OBCHAN   
      COMMON      /IODEFN/ MPCHAN   
      COMMON      /IODEFN/ DBCHAN   
      COMMON      /IODEFN/ TTYIN
      COMMON      /IODEFN/ TTYOUT   
      INTEGER     SEARCH, DUMMY 
C     WRITE (DBCHAN, 1) 
C    1FORMAT (' ENTER ENTER')   
      NLX = SEARCH (DUMMY)  
      IF (.NOT. (NLX.EQ.0))GO TO 13014  
    
      CALL ERROR(5) 
      GO TO 13015   
13014 CONTINUE  
    
      IF (.NOT. (NFLAGS(NLX).EQ.0))GO TO 13016  
    
      IF (.NOT. (TXSTRT+NSIZE .GT. TXSTOP))GO TO 13018  
    
      CALL ERROR(6) 
      GO TO 13019   
13018 CONTINUE  
    
      OLDNAM = .FALSE.  
      CALL MOVE (NAME, NTEXT(TXSTRT), NSIZE)
      NTEXTX (NLX) = TXSTRT 
      TXSTRT = TXSTRT + NSIZE   
      NFLAGS(NLX) = USEBIT + NSIZE  
13019 CONTINUE  
    
      GO TO 13017   
13016 CONTINUE  
    
      OLDNAM = .TRUE.   
13017 CONTINUE  
    
      IF (.NOT. (ID.GT.0))GO TO 13020   
    
      IF (.NOT. (ID.GT.DTSTOP))GO TO 13022  
    
      CALL ERROR(12)
      GO TO 13023   
13022 CONTINUE  
    
      IF (.NOT. (DICT(ID).NE.0))GO TO 13024 
    
      CALL ERROR(13)
      GO TO 13025   
13024 CONTINUE  
    
      DICT(ID) = NLX
13025 CONTINUE  
    
13023 CONTINUE  
    
13020 CONTINUE  
    
13015 CONTINUE  
    
C     WRITE (DBCHAN, 2) 
C    2FORMAT (' EXIT ENTER')
      RETURN
      END