I/O Monitor Guide for Paper Tape Systems PDP-9 Advanced Software System

This document functions as an operational guide for the paper tape version of the Digital Equipment Corporation's PDP-9 Advanced Software System. Intended for convenient use at the computer, it provides a comprehensive overview of how to load and operate various system programs.

The manual covers detailed procedures for the following key programs:

• FORTRAN IV: Loading, commands, running instructions, error handling, and restart procedures.
• MACRO-9: Similar operational details for the assembler.
• PIP-9 (Peripheral Interchange Program): Instructions for file transfer, verification, and segmentation, including command string formats and switch options.
• Editor (EDIT-9): Procedures for creating and modifying files, a summary of editing commands, error conditions, and restart information.
• 7-to-9 Converter (CONV-9): Guidance on converting paper tapes between formats.
• Linking Loader (LINK-9): Procedures for loading user programs and libraries.
• DDT-9 (Dynamic Debugging Technique): Instructions for loading programs for debugging and a summary of DDT commands.

Beyond individual program instructions, the guide also includes several appendices:

• Device Assignments: Details on the .DAT slot assignments for various I/O devices.
• PDP-9 ASCII Character Set: A table of ASCII characters and their interpretations.
• Error Diagnostics: Lists of error codes and their meanings for MACRO-9, IOPS, and FORTRAN IV.
• System Restart: Procedures for restarting the system programs.
• MACRO-9 Permanent Symbol Table: A list of built-in symbols for the assembler.

The document serves as a practical, concise reference for operating the PDP-9 paper tape software, while referring users to more detailed manuals for in-depth information.