Basic Memory Control Test

This document outlines the diagnostic program MAINDEC 12-D1FA-L, created in 1971 for the PDP-12. It covers the functionality and usage of the Basic Memory Control Test, which exercises memory control instructions in both 8 and L modes.

Key features include: - Requirements: 4K of memory. - Switch Register options for control (e.g., inhibiting errors, looping routines). - Program structure: Resident in bank 0 (locations 5000 to 5177). - Error reporting: Uses location 5033 for halts upon error detection with diagnostic message printout. - Detailed instruction definitions and interrupt handler logic are included in the appendix.