HP 3000 Manuals

HP FORTRAN 77/iX Migration Guide

Using MPE V Binary Data Files or TurboIMAGE Databases 

If your program accesses binary data files or databases, use one of the
following directives:

   $HP3000_16 REALS       Allows access to floating-point or double
                          precision data in MPE V format but assumes
                          MPE/iX data alignment.  Use this directive when
                          accessing binary data files that were created
                          on an MPE V system and that contain
                          floating-point values.

   $HP3000_16 ALIGNMENT   Aligns noncharacter data on 16-bit boundaries.
                          Use this directive if your program uses a
                          TurboIMAGE database but none of the data items
                          are floating-point or double precision.

MPE/iX 5.0 Documentation