g77 doesn't have support for keywords such as
These extensions are easy to add to g77 itself, but
require much more work on
g77 doesn't support
FORM='PRINT' or an equivalent to
translate the traditional `carriage control' characters in column 1 of
output to use backspaces, carriage returns and the like. However
programs exist to translate them in output files (or standard output).
These are typically called either fpr or asa. You can get
a version of asa from
ftp://sunsite.unc.edu/pub/Linux/devel/lang/fortran for GNU
systems which will probably build easily on other systems.
Alternatively, fpr is in BSD distributions in various archive