LAN VCI Specification

This document, titled 'LAN VCI Specification', dated April 1, 1993, provides technical details on the privileged VMS Communications Interface (VCI) for LAN device drivers. It explains the VCI architecture, including its service routines, data structures (such as LAN blocks, VCI blocks, VMS Communications Request Packets, and Data Chain Blocks), and the procedures for starting, managing, and shutting down VCI ports. The specification also outlines transmit and receive packet processing, event reporting, and status values, with appendices detailing registered VCI user IDs and the document's revision history.