DEC-10-LFORA-B-D FORTRAN-10 Language Manual Ver 1A Jan74

This document is the FORTRAN-10 Language Manual, Second Edition, published by Digital Equipment Corporation in January 1974. It serves as a comprehensive reference for the FORTRAN-10 language, as implemented by the DECsystem-10 FORTRAN-10 Language Processing System (Version 1A Compiler and Version 2 Object Time System, FOROTS).

The manual details:

• The FORTRAN-10 language fundamentals, including its character set, statement structure, various data types (integer, real, double precision, complex, octal, logical, literal, statement labels), symbolic names, variables, and arrays (with specifics on subscripts, dimensioning, and storage order).
• Expressions, covering arithmetic and logical operations, their hierarchy of evaluation, and mixed mode expressions.
• All statement categories, such as compilation control (END), specification (DIMENSION, TYPE, IMPLICIT, COMMON, EQUIVALENCE, EXTERNAL), DATA, assignment (arithmetic, logical, ASSIGN), and program control (GO TO, IF, DO, CONTINUE, STOP, PAUSE with TRACE option).
• Extensive information on Input/Output (I/O) statements, including transfer modes (sequential, random access, append), specific I/O commands (READ, REREAD, WRITE, ACCEPT, PRINT, PUNCH, TYPE, FIND, ENCODE, DECODE), NAMELIST statements, File Control statements (OPEN, CLOSE, and their numerous options), FORMAT statements, and Device Control statements (REWIND, UNLOAD, BACKSPACE, ENDFILE, SKIPRECORD, SKIPFILE, BACKFILE).
• Subprogram statements, defining statement functions, intrinsic functions, external functions, subroutines (CALL, RETURN, multiple returns), and multiple entry points (ENTRY statement).
• BLOCK DATA subprograms for initializing common storage areas.

Appendices further provide:

• The ASCII-1968 character code set.
• Guidelines for writing user programs, covering compiler usage, switches, listing interpretation, error reporting, optimization techniques, and interfacing with other systems (MACRO-10, F40, COBOL-10).
• A detailed description of FOROTS (FORTRAN-10 Object Time System), outlining its hardware and software requirements, features, error processing, I/O facilities, memory management, and device assignments.
• An guide to debugging FORTRAN programs using FORDDT, an interactive debugging tool, and its commands.

FORTRAN-10 extensions and additions to the 1966 ANSI standard are specifically indicated in boldface italic type throughout the manual.