PDP-6 Arithmetic Processor 166 Instruction Manual Volume 1

This document, Volume 1 of a two-volume set, serves as an instruction manual for the PDP-6 Arithmetic Processor Type 166 and its common input/output devices, including the Paper Tape Reader, Paper Tape Punch, Teletype Keyboard-Printer, and Card Reader.

The manual is structured to provide a comprehensive understanding of the system, beginning with an introduction to its overall design, operating specifications, and physical and electrical characteristics. It then delves into the system's functional aspects, covering programming concepts, instruction formats, number systems (fixed and floating-point), memory organization, and the main sequence of operations, including console control, instruction execution, and the executive system. Detailed sections are dedicated to arithmetic logic (registers, shift counting, multiplication, division), memory logic (addressing and control), and input/output operations, including the priority interrupt system.

A significant portion of the manual is dedicated to maintenance, outlining procedures for operation, maintenance programs, preventive maintenance, troubleshooting, and repair. It includes detailed descriptions of control panels, processor operating procedures, drawing conventions, and flow charts to aid in understanding system logic. The manual also features appendices with engineering drawings, a list of spares, a glossary of technical terms, and tables of instruction codes, Teletype codes, and card reader codes.