Combined Reader and Punch Test

This document describes a diagnostic utility program for the PDP-1 computer system. It is designed to verify the performance of the paper tape reader and punch by using a closed loop tape consisting of alternating bits. The document provides:

• Introduction: Explains how the test reads and verifies bits against core memory, incorporating user-defined test word switches.
• Operating Instructions: Details the step-by-step process for running the reader test, including setting address switches, configuring test word switches to vary speed or select bits, and monitoring for errors.
• Punch Test: Outlines procedures for using the program to test the punch mechanism as part of a closed loop operation.
• Code Listings: Provides the complete source code for the test program.