MicroVAX 3100 Model 40 to Model 90 Upgrade Guide

This document is an upgrade guide for the MicroVAX 3100 system, detailing the process to convert a Model 40 to a Model 90. It is intended for both Digital Services representatives and self-maintenance customers.

The guide provides:

• Upgrade Kit Contents: A list of parts included in the upgrade kits, primarily a new Model 90 CPU module (KA50-AA) and associated memory, licenses, and labels.
• Installation Procedures: Step-by-step instructions for physically upgrading the system, including backing up software, shutting down the system, removing the old CPU module (KA45-AA), installing the new CPU module (KA50-AA) (with a critical step of transferring the Ethernet ID ROM), installing new memory, testing the system configuration, and applying new product and serial labels.
• Differences between Models: A comparison of features between the Model 40 and Model 90 CPU modules to aid in correct installation.
• Module Return Procedures: Detailed instructions for returning the replaced parts (especially the old CPU module) to Digital Equipment Corporation. This is emphasized as mandatory for U.S. Export License compliance and for customers to receive credit. Separate procedures are provided for Digital Services personnel and self-maintenance customers, along with necessary forms.

The document, published in September 1992 by Digital Equipment Corporation, also references other MicroVAX 3100 maintenance manuals for more detailed hardware installation and maintenance procedures.