PDP-11 Instruction Set

This document provides a comprehensive technical overview of the PDP-11 computer architecture. It covers the system's storage organization, memory addressing modes (including relative, page 0, full, immediate, general register, external, and indexed addressing), and a detailed breakdown of machine instructions. The instructions are grouped into several categories: Memory Reference (such as load, store, add, compare, and logical operations), Operate (accumulator manipulations), Conditional Jump, Add to Register, Push/Pop, and External Transfer. The document also includes specific technical notes on system bus operations, device communication, and interrupt handling.