FORTRAN 1.0 is an earlier version than documented in the 1976 and 1977 manuals.
Specifically, the numeric listing option posfix meanings are different. Here
are the options for FORTRAN 1.0:

FORT,#CN[x],objFn,srcFn

The #CN specifies the console as the listing device. #LP specifies the printer
as the listing device. These options remain the same in later versions. However,
the meaning of the optional number 'x' is different.

No number or '0', normal listing is generated
'1', Surpress the source, only the symbol table for each module is listed
'5', Show the data generated by the compile for each source line
Any other digit displays '?' like it want some input to continue. Not sure what
the expected input is.