! *** 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
    
    
    ! +
    ! 
    !  Pseudo terminal driver notification AST type definitions.
    ! 
    !  N.B.
    ! 	These definitions are in a specific order and must not be changed
    !  without matching changes to FTUCBDEF, and FTDRIVER.
    ! 
    ! -
      DECLARE LONG CONSTANT PTD$C_SEND_XON = 0  !  Enable or disable XON AST
      DECLARE LONG CONSTANT PTD$C_SEND_BELL = 1  !  Enable or disable BELL AST
      DECLARE LONG CONSTANT PTD$C_SEND_XOFF = 2  !  Enable or disable XOFF AST
      DECLARE LONG CONSTANT PTD$C_STOP_OUTPUT = 3  !  Enable or disable stop output AST
      DECLARE LONG CONSTANT PTD$C_RESUME_OUTPUT = 4  !  Enable or disable resume output AST
      DECLARE LONG CONSTANT PTD$C_CHAR_CHANGED = 5  !  Enable or disable characteristics change AST
      DECLARE LONG CONSTANT PTD$C_ABORT_OUTPUT = 6  !  Enable or disable abort output AST
      DECLARE LONG CONSTANT PTD$C_START_READ = 7  !  Enable or disable start read AST
      DECLARE LONG CONSTANT PTD$C_MIDDLE_READ = 8  !  Enable or disable middle read AST
      DECLARE LONG CONSTANT PTD$C_END_READ = 9  !  Enable or disable end read AST
      DECLARE LONG CONSTANT PTD$C_ENABLE_READ = 10  !  Enable read ASTs
      DECLARE LONG CONSTANT PTD$C_DISABLE_READ = 11  !  Disable read ASTs
      DECLARE LONG CONSTANT PTD$C_MAX_EVENTS = 12