Df32 Discless Logic Test, Minidisc

This document serves as the technical manual and diagnostic test for the DF32 Disc Logic and its computer interface for the PDP-8. It outlines procedures for testing the logic and interface independently of the physical disc hardware.

Key information included in this document:

• Purpose: To verify that logic components such as registers, track counters, interrupt controls, and status bits function correctly.
• Requirements: Requires a standard PDP-8 and a specific "Light Card" for testing track selector logic.
• Operational Procedures: Detailed starting addresses (e.g., 100 for standard operation, 76 for abnormal printout checks) and switch settings for testing specific functional sections.
• Error Reporting: A comprehensive table of error tags, expected results, and troubleshooting/corrective actions.
• Maintenance: Includes scope loops and diagnostic flowcharts to assist technicians in isolating hardware malfunctions.
• Source Code: The final pages provide the complete assembly-level code for the diagnostic program.

The document emphasizes that this is not a test of the disc itself or its analog circuits, but specifically of the logic interface. If failures occur during these tests, the user is instructed to use the "DF32 Disc Data Test" to verify the remaining disc system components.