Digital Personal Workstation Pentium™ II Dual Processor Upgrade Kit Upgrade Instructions

This document provides software upgrade instructions for installing a second Intel Pentium™ II processor in a Digital Personal Workstation running Microsoft Windows NT 4.0 Workstation or Server. It supplements mechanical installation guides by detailing the necessary software modifications for Windows NT 4.0 to recognize and utilize both processors.

Key prerequisites include having matched processor stepping and Windows NT 4.0 Service Pack 2 or later installed. The upgrade process involves:

1. Backing up the system and installing the second processor physically.
2. Editing the setup.log file located in the \WINNT\repair directory.
3. Replacing specific entries in setup.log: the second occurrence of NTOSKRNL.EXE with NTKRNLMP.EXE, and the second occurrence of HAL.DLL with HALMPS.DLL.
4. Saving the modified setup.log and reapplying the currently installed Windows NT Service Pack.

After the upgrade, users should verify that both processors are recognized by checking the boot-up screen and the Performance Monitor under "Administrative Tools." Finally, it is recommended to create a new Emergency Repair Disk (ERD) using Rdisk.exe. The document emphasizes that individuals unfamiliar with hardware and software upgrades should not perform this procedure.