PDP-11/40E Microcode Simulator

This technical report provides a comprehensive guide to the PDP-11/40E microcode simulator, which serves as a microprogram development aid. The document includes:

• Introduction to Simulation: An overview of microcode simulation techniques and the role of the simulator in the microprogramming laboratory.
• System Operation: Instructions for using the MICRO/40 assembler and the simulator, including file handling (.mic, .bin, .tab, .lst) and interface details.
• Command Reference: A detailed tutorial and reference for simulator commands, covering simulation control (G, S, T, B, R, X, E), input/output control (GET, SET), and hardware initialization (O, I, L, P, C).
• Error Handling: A classification of simulator error messages, categorized by type (execution vs. internal), to aid in debugging.
• Hardware Implementation: Insights into the simulator's model of the PDP-11/40E hardware and WCS 11/40 microinstructions.
• Practical Examples: A step-by-step terminal session demonstrating the development, assembly, simulation, debugging, and correction of an example microprogram (fastc.mic).

The report concludes with technical references and register-transfer block diagrams for the PDP-11/40E and WCS 11/40.