DEUNA

This document is the DEUNA User's Guide (EK-DEUNA-UG-001), providing comprehensive information on the DIGITAL Equipment UNIBUS Network Adapter (DEUNA).

The guide details how the DEUNA interfaces VAX-11 and PDP-11 family computers to an ETHERNET local area network. It covers:

1. Introduction and Overview: Explains DEUNA's general description, system operation, specifications (e.g., 10 Mbit/s data rate, support for up to 1024 stations, 32 KB buffer, collision detection, down-line loading, ROM microdiagnostics), and the ETHERNET network characteristics.
2. Installation: Provides instructions for unpacking, pre-installation considerations (like backplane and power requirements), device address and vector assignment, cabling, and initial testing procedures using LEDs and diagnostics.
3. Service: Outlines the maintenance philosophy, describes available VAX-11 and PDP-11 diagnostics (functional and repair level), and presents corrective maintenance procedures for isolating faulty components.
4. Programming: Explains how to program the DEUNA, covering its control and status registers, port command functions, transmit and receive descriptor rings, data buffers, and various operational modes and commands, including exceptional operations like channel loopback and remote console functions.
5. Appendices: Offers detailed information on floating device addresses and vectors, remote booting and down-line loading processes, the Network Interconnect Exerciser, and the DEUNA microcode ECO process.