/F77 (Alpha only) D=/F77

 /[NO]F77 

 Controls whether the compiler uses FORTRAN-77 interpretation rules
 for those statements that have a meaning incompatible with
 FORTRAN-66.  See the HP Fortran for OpenVMS User Manual for a
 discussion of these incompatibilities.

 The default is /F77.  If you specify /NOF77, the compiler selects
 FORTRAN-66 interpretations in cases of incompatibility.

 If you omit /NOF77, DO loops whose lower range exceeds the upper
 range are not executed.

 You can also specify this qualifier using the OPTIONS statement.