Alpha Microprocessors SROM Mini-Debugger User's Guide

This document is a user's guide for the Alpha Microprocessors SROM Mini-Debugger, a tool designed for hardware and software developers. Its primary purpose is to enable basic hardware debugging for Alpha PCI 64-275 and Alpha PCI 164-266/300 motherboards, allowing users to establish initial functionality of core components like cache, memory, and I/O subsystems before more fully featured monitors can be utilized.

The guide covers:

• Introduction: An overview of the mini-debugger's features, including basic hardware debugging, memory examination and deposition, a case-independent command language, and support for variable baud rates.
• Getting Started: Detailed instructions on the necessary hardware (Alpha motherboard with SROM serial port, host system like a terminal or an Alpha platform running Windows NT or Digital UNIX), how to connect the SROM serial port to the host system, and how to start the mini-debugger (by typing an uppercase 'U' for auto-baud detection). It also outlines the default conditions of the debugger and provides sample sessions for initializing specific Alpha PCI boards, including memory, cache, and PCI interface setup.
• SROM Mini-Debugger Command Set: A comprehensive description of the debugger's command language and features. Commands enable various operations such as depositing and examining data at memory locations and CPU registers, setting data and address modes (quadword/longword, high/low memory), filling and block-reading memory ranges, performing looping memory operations, loading external images, controlling program execution, and displaying register contents.
• Onboard Machine Check Handler: Information on its use for debugging memory faults.