! *** 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
    
    
    ! 
    !         terminal control xab field definitions
    !                 $xabtrmdef
    ! 
    ! 
      DECLARE LONG CONSTANT XAB$C_TRM = 31  ! XABTRM ID CODE
      DECLARE LONG CONSTANT XAB$S_XABTRMDEF = 36
      record XABTRMDEF
         BYTE XABTRMDEF$$_FILL_1
         BYTE XABTRMDEF$$_FILL_2
         WORD XABTRMDEF$$_FILL_3
         LONG XABTRMDEF$$_FILL_4            ! HAS SAME COD, BLN, SPARE AND NXT FIELD
    ! THESE 4 FIELDS ARE COMMON TO ALL XABS AND
    ! HAVE BEEN DEFINED BY $XABDEF
         LONG XAB$L_ITMLST                  !  item list address
         WORD XAB$W_ITMLST_LEN              !  item list length
         WORD XABTRMDEF$$_FILL_5            !  spare
         LONG XABTRMDEF$$_FILL_6            !  spare
         LONG XABTRMDEF$$_FILL_7            !  spare
         LONG XABTRMDEF$$_FILL_8            !  spare
         LONG XABTRMDEF$$_FILL_9            !  spare
         LONG XABTRMDEF$$_FILL_10           !  spare
      end record XABTRMDEF
    
    !  basealign on aggregate XABTRMDEF operates after aggregate end
      DECLARE LONG CONSTANT XAB$K_TRMLEN = 36  !  length of xab of type terminal control
      DECLARE LONG CONSTANT XAB$C_TRMLEN = 36  !  length of xab of type terminal control