PDP-12 Relay Register Test

This document provides instructions for using the PDP-12 relay register diagnostic and exerciser, which consists of three distinct programs for testing the relay flip-flop register. It details the required equipment (including a PDP-12, relay register option, teletype, and optional oscilloscope), loading procedures via the binary loader, and specific starting procedures for the main diagnostic, signal tracing routine, and relay switching test. The document also provides a comprehensive list of error codes that indicate specific failures, such as transfer errors between the accumulator and relay register.