VAX 4000 BA42B-Based System DSSI Upgrade Manual

This document, the "VAX 4000 BA42B-Based System DSSI Upgrade Manual" (August 1993), provides detailed instructions for upgrading VAX 4000 Model 100 and Model 100A systems.

The primary purpose of the upgrade is to add a dual DSSI (Digital Standard System Interconnect) card and two additional DSSI ports. This enables the system to support external DSSI devices or to be part of a DSSI-based VAXcluster.

Key aspects covered in the manual include:

• Overview of Conversion Processes: Summarizes the tasks involved, noting that the VAX 4000 Model 100 upgrade is more extensive (including new port cover, firmware/VMS upgrades, and system medallion replacement) than the Model 100A upgrade (primarily hardware replacement for DSSI functionality).
• Detailed Step-by-Step Procedures: Provides comprehensive instructions for unpacking the upgrade kit, installing firmware and upgrading VMS (for Model 100), and installing the new dual DSSI daughter card and associated cabling for both Model 100 and Model 100A systems.
• Audience: Intended for Digital Services personnel and licensed self-maintenance customers.
• Mandatory Daughter Card Return: Crucially, the manual outlines a mandatory procedure for returning the original single DSSI daughter card, stating that a fee will be charged if it is not returned. It includes forms and contact information for this return process.

In essence, it's a technical guide for Digital Equipment Corporation's field service and authorized customers to physically and logically upgrade specific VAX 4000 models to support dual DSSI connectivity.