RX8 Data Reliability/Exerciser

This document details the diagnostic software "RX8 Data Reliability/Exerciser" (MAINDEC-08-DIRXB-D), designed by Digital Equipment Corporation in 1975-1976. The program serves as a tool for collecting statistical information regarding the reliability of RX01 diskette drives and the associated RX8 microprocessor controller.

Key aspects of the document include:

• Purpose: To monitor and collect performance data on diskette drive operations, including various types of errors (e.g., write, read, CRC, parity, and seek errors).
• Operation: The software runs on a PDP-8/E computer with at least 4K of core memory, a console, and an RX01 diskette subsystem. It can be operated via the system console or through an optional "Console Package" that allows terminal-based interaction.
• Diagnostic Features: The program provides multiple test parameters and sequences (e.g., read-only, write-only, verify, and compatibility tests) to stress-test the hardware. It allows for manual intervention by field engineers to isolate specific diskette areas or test conditions.
• Error Handling: The software includes detailed error definitions, reporting procedures, and recovery mechanisms, including automatic retries for recoverable errors and specific halts for fatal conditions.
• Program Code: The majority of the document provides the source code (assembly listing) for the program, along with comprehensive symbol and cross-reference tables for debugging and maintenance.