DELUA User's Guide

This document is the "DELUA User's Guide" (EK-DELUA-UG-002), published by Digital Equipment Corporation (DEC) in 1986. It serves as a comprehensive technical manual for the DELUA, an Ethernet UNIBUS adapter designed to connect DEC VAX and PDP-11 computers to Ethernet local area networks (LANs).

The guide provides detailed information across several key areas:

1. Introduction: An overview of Ethernet, the physical description of the DELUA, its system operation (including data link layer functions like encapsulation, decapsulation, and link management), diagnostic capabilities, internal hardware components, and technical specifications.
2. Installation: Step-by-step instructions for installing the DELUA board, covering pre-installation considerations (e.g., backplane, bus constraints), setting device and vector addresses via physical switches, unpacking, and verification checks.
3. Programming Overview: Explains how the host system programs and controls the DELUA using port commands and ancillary functions, describing the various functional states (ready, reset, halted), data frame transmission/reception, and power-up sequences.
4. Registers and Commands: Provides in-depth technical specifications of the DELUA's Port Control and Status Registers (PCSRs), detailed descriptions of numerous ancillary functions (e.g., for reading/writing addresses, counters, memory, system ID parameters), and the formats for transmit/receive descriptor rings and data buffers.
5. Maintenance Operations: Covers remote booting and down-line loading procedures, various frame formats used in these processes (boot, program request, memory load), loopback testing modes (internal, external, channel), and microcode management.
6. Service: Outlines the maintenance philosophy and troubleshooting procedures, including self-tests and specific functional diagnostics for VAX and PDP-11 systems.
7. Appendices: Contains supplementary technical data, particularly on floating device and vector address assignments.

The guide is intended for technical users, system administrators, and developers responsible for the installation, configuration, programming, and maintenance of DELUA adapters within DEC-based network environments.