VAX 6000: Installing Model 500 Processors

This document, "VAX 6000: Installing Model 500 Processors (EK-KA65A–UP-001)," serves as an installation guide for Digital customer service engineers and self-maintenance customers. Its primary purpose is to detail the process of installing Model 500 processor modules (KA65A) in a VAX 6000 system.

The manual covers two main scenarios for upgrading to a Model 500:

1. Adding processors to an existing VAX 6000 Model 500 system.
2. Upgrading older VAX 6000 Model 200, 300, or 400 systems to a Model 500.

A key focus is ensuring the KA65A processor receives the necessary +3.3V power. This is achieved via two methods detailed in the manual:

• Removing the +3.3V Inhibit Cable for Model 300/400 systems that already supply +3.3V but inhibit it for older configurations.
• Installing the H9657-CX upgrade kit, which includes a T2019 power regulator module and a bus bar, for Model 200/300/400 systems lacking +3.3V. The manual notes that the H9657-CX kit has specific limitations (e.g., maximum 4 CPUs, 12 XMI slots, no battery backup); if these are exceeded, a full power/packaging upgrade (H9657-CU kit) is required, which is documented in a separate manual.

The general installation process outlined includes:

• Preparation: Saving EEPROM contents, recording system parameters, shutting down the system, removing old modules (and noting module compatibility), and verifying operating system compatibility (VMS Version 5.4 or later is required).
• Physical Installation: Performing the specific power supply adjustments (cable removal or H9657-CX kit installation), followed by careful handling and installation of the KA65A processor modules into the XMI card cage (noting that KA65A only works with MS65A memories).
• System Verification: Powering up the system, examining self-test results, setting system parameters (including serial numbers and power indication for upgraded systems), applying ROM patches with the EVUCA program, running optional diagnostics, saving updated parameters, verifying system operation under the operating system (e.g., with UETP), and changing the system number plate.

Appendices provide general configuration rules for the Model 500 and details on interpreting KA65A processor LEDs for troubleshooting.