! *** PREDECLARED TYPES
     
      %IF %DECLARED ( %BASIC$QUADWORD_DECLARED ) = 0 %THEN
         RECORD BASIC$QUADWORD
            LONG FILL ( 2 )
         END RECORD
         %LET %BASIC$QUADWORD_DECLARED = 1
      %END %IF
     
      %IF %DECLARED ( %BASIC$OCTAWORD_DECLARED ) = 0 %THEN
         RECORD BASIC$OCTAWORD
            LONG FILL ( 4 )
         END RECORD
         %LET %BASIC$OCTAWORD_DECLARED = 1
      %END %IF
     
      %IF %DECLARED ( %BASIC$HFLOAT_AXP_DECLARED ) = 0 %THEN
         RECORD BASIC$HFLOAT_AXP
            LONG FILL ( 4 )
         END RECORD
         %LET %BASIC$HFLOAT_AXP_DECLARED = 1
      %END %IF
     
      %IF %DECLARED ( %BASIC$F_FLOATING_COMPLEX_DECL ) = 0 %THEN
         RECORD BASIC$F_FLOATING_COMPLEX
            SINGLE REAL_PART
            SINGLE IMAGINARY_PART
         END RECORD
         %LET %BASIC$F_FLOATING_COMPLEX_DECL = 1
      %END %IF
     
      %IF %DECLARED ( %BASIC$D_FLOATING_COMPLEX_DECL ) = 0 %THEN
         RECORD BASIC$D_FLOATING_COMPLEX
            DOUBLE REAL_PART
            DOUBLE IMAGINARY_PART
         END RECORD
         %LET %BASIC$D_FLOATING_COMPLEX_DECL = 1
      %END %IF
     
      %IF %DECLARED ( %BASIC$G_FLOATING_COMPLEX_DECL ) = 0 %THEN
         RECORD BASIC$G_FLOATING_COMPLEX
            GFLOAT REAL_PART
            GFLOAT IMAGINARY_PART
         END RECORD
         %LET %BASIC$G_FLOATING_COMPLEX_DECL = 1
      %END %IF
     
      %IF %DECLARED ( %BASIC$H_FLOAT_AXP_CMPLX_DCL ) = 0 %THEN
         RECORD BASIC$H_FLOATING_COMPLEX_AXP
            BASIC$HFLOAT_AXP REAL_PART
            BASIC$HFLOAT_AXP IMAGINARY_PART
         END RECORD
         %LET %BASIC$H_FLOAT_AXP_CMPLX_DCL = 1
      %END %IF
    
    
    ! +
    ! 
    !  Breakthru system service input definitions.
    ! 
    ! -
      DECLARE LONG CONSTANT BRK$C_DEVICE = 1  !  device name
      DECLARE LONG CONSTANT BRK$C_USERNAME = 2  !  user name
      DECLARE LONG CONSTANT BRK$C_ALLUSERS = 3  !  all users
      DECLARE LONG CONSTANT BRK$C_ALLTERMS = 4  !  all logged in users
      DECLARE LONG CONSTANT BRK$C_MAXSENDTYPE = 4
    ! 
    !  Requestor ID's, DEC use only (0-31)
    ! 
      DECLARE LONG CONSTANT BRK$C_GENERAL = 0  !  GENERAL (OR UNSPECIFIED)
      DECLARE LONG CONSTANT BRK$C_PHONE = 1  !  PHONE
      DECLARE LONG CONSTANT BRK$C_MAIL = 2  !  MAIL
      DECLARE LONG CONSTANT BRK$C_QUEUE = 3  !  QUEUE MANAGER
      DECLARE LONG CONSTANT BRK$C_SHUTDOWN = 4  !  SYSTEM SHUTDOWN
      DECLARE LONG CONSTANT BRK$C_URGENT = 5  !  URGENT MESSAGE
      DECLARE LONG CONSTANT BRK$C_DCL = 6   !  DCL (control T)
      DECLARE LONG CONSTANT BRK$C_OPCOM = 7  !  OPERATOR MESSAGE
    !  Note that only first 16 are really stored by TTDRIVER now 
      DECLARE LONG CONSTANT BRK$C_USER1 = 32  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER2 = 33  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER3 = 34  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER4 = 35  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER5 = 36  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER6 = 37  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER7 = 38  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER8 = 39  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER9 = 40  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER10 = 41  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER11 = 42  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER12 = 43  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER13 = 44  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER14 = 45  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER15 = 46  !  reserved to customer
      DECLARE LONG CONSTANT BRK$C_USER16 = 47  !  reserved to customer
      DECLARE LONG CONSTANT BRK$M_SCREEN = x'00000100'
      DECLARE LONG CONSTANT BRK$M_BOTTOM = x'00000200'
      DECLARE LONG CONSTANT BRK$M_NOREFRESH = x'00000400'
      DECLARE LONG CONSTANT BRK$M_CLUSTER = x'00000800'
      DECLARE LONG CONSTANT BRK$S_FLAGS_INPUT = 2
      record FLAGS_INPUT                    !  mimics $BRDCSTDEF
          !  number of lines to erase
          !  Do screen formatted write
          !  "screen" message at bottom
          !  Refresh an interrupted read
          !  broadcast to cluster
         WORD ERASE_LINES_bits   ! COMMENT ADDED BY SDL - ERASE_LINES_bits contains bits ERASE_LINES through FILL_64_
      end record FLAGS_INPUT