Pdp-8/s

This document is a technical maintenance manual for the Digital Equipment Corporation PDP-8/S computer. It provides detailed information on the system's physical and electrical characteristics, operation, and maintenance procedures.

The manual is divided into five chapters:

• Chapter 1: An introduction to the computer, outlining its general purpose, word length, instruction format, number systems, and physical/environmental requirements.
• Chapter 2: Describes system operation, including programming, instruction sets, timing, processor operations (keys, switches, indicators), and the use of the Model 33 ASR Teletype.
• Chapter 3: Details the system logic, including an overview of the engineering drawings, signal notation, register operations, memory control, and I/O bus operations.
• Chapter 4: Covers maintenance procedures, including recommended spare parts, test programs (MAINDEC), memory alignment and troubleshooting, and specifications for the in-out bus.
• Chapter 5: Details optional expansion features for the PDP-8/S, including the OMD8S mounting assembly, MC8S memory extension, DB8S data break facility, and ME8S memory expansion.

The document includes extensive technical appendices with engineering drawing indices, signal glossaries, and comprehensive logic diagrams for the processor, memory, and various options.