Basic PDP-8 and 8/I Memory Checkerboard

This document provides the diagnostic procedure for the Basic PDP-8 and 8/I Memory Checkerboard (MAINDEC-08-D1L0). It includes:

• Abstract: Describes testing memory for core failure under worst-case conditions in 4K systems.
• Requirements: Lists equipment needs and storage locations for both 'Low End' and 'High End' program versions.
• Procedures: Details loading instructions via RIM loader, starting addresses, and switch settings for different core unit configurations.
• Operation: Explains how the diagnostic writes, complements, and checks memory to detect incorrect bits.
• Error Handling: Outlines error halts, specific memory addresses for faults, and operator recovery actions.