PMAX Boot Information

This document provides technical information regarding the PMAX Boot ROM, specifically for the DECstation 3100. It covers:

• Boot ROM Operations: Instructions on accessing the boot prompt using Control-C at power-up or via system 'halt' commands.
• Command Reference: A list of useful firmware commands for managing the system, including boot, setenv, printenv, and test.
• Troubleshooting: A comprehensive guide to Power On Self Test (POST) codes, including console codes and rear LED indicators for diagnosing hardware issues (e.g., video, serial, SCSI, memory).
• Operating System Considerations: Notes on booting environments like NetBSD and Ultrix, including limitations regarding single-user mode and system security.