All parameters defined by the FORTRAN parameter statements are specified in the include file: DL_PARAMS.INC, which is included at compilation time in all subroutines requiring the parameters. All parameters specified in DL_PARAMS.INC are described by one or more comment cards.
Note that since the implementation of FORTRAN 90 memory management in Version 2.11, the DL_PARAMS.INC file also contains the COMMON block /params/ described above.