Personal DECstation 5000 Model 50, R4000 Series CPU Upgrade

This document provides a step-by-step guide for upgrading a Personal DECstation 5000 Model 50 to an R4000 Series CPU.

Key steps and important considerations include:

1. Preparation & Verification:

   • Checking the shipment contents to ensure all parts (CPU upgrade module, antistatic wrist strap, tools, labels, documentation, medallions) are present.
   • Crucially, saving all packaging for the return of the old CPU module.
   • Verifying system software version: ULTRIX and UWS must be version 4.3A or later. If not, a software upgrade is mandatory before proceeding with the hardware upgrade.

2. System Shutdown: Proper shutdown procedures for the system software are detailed, including recording necessary boot information.

3. Hardware Installation:

   • Removing the system unit cover.
   • Attaching an antistatic wrist strap is emphasized as critical for preventing damage to components.
   • Removing the existing R3000 CPU module using a specialized tool.
   • Installing the new R4000 CPU module, with a caution not to push on the heat sink.

4. Post-Installation:

   • Replacing the system unit cover.
   • Attaching a product conversion label and replacing the system medallion.
   • Powering on the system and using specific commands to boot the software from the upgraded CPU.

5. Return Procedure: Instructions are provided for packaging and returning the old R3000 CPU module to Digital using the saved packaging.