The default I/O units,
specified by `READ fmt',
`WRITE (UNIT=*)', and
should not be units 5 (input) and 6 (output),
but, rather, unit numbers not normally available
for use in statements such as
Changing this would allow a program to connect units 5 and 6
to files via
but still use `READ (UNIT=*)' and `PRINT'
to do I/O to the “console”.
This change probably requires the