FORTRAN/RT-11 Extensions Manual

This document, published in October 1977, provides comprehensive documentation for the FORTRAN/RT-11 extensions on the PDP-11 architecture. It covers a library of subprograms written in MACRO assembler that enable real-time data acquisition and processing, including support for laboratory peripherals, analog-to-digital (A/D) conversion, digital I/O, and graph plotting. Furthermore, the manual details the FORTRAN Debugging Technique (FDT), an interactive tool that allows users to control program execution, examine and modify variables, and troubleshoot FORTRAN IV programs. The manual includes configuration instructions for building the real-time support library, a comprehensive list of routines with their calling syntax and arguments, detailed command descriptions for FDT, error message explanations, and useful appendices for quick reference.