LCG NI Port Architecture

This document provides a comprehensive description of the software interface for the LCG NI port. It covers the port architecture, port control block (PCB), command and response structures, packet filtering mechanisms, error handling strategies, and various port commands including those for data transfer and performance monitoring. It serves as a technical reference for developing drivers that interface with the LCG NI port, ensuring compliance with DEC specifications such as the Ethernet standard.