Digital Alpha VME 4/224 and 4/288 Single-Board Computers User Guide and Description

This document is a User Guide and Technical Description for the Digital Alpha VME 4/224 and 4/288 Single-Board Computers.

The manual is primarily intended for OEM system integrators and manufacturing/field technicians responsible for integrating, installing, configuring, diagnosing, and maintaining these single-board computers within their systems.

Key areas covered in the document include:

• Product Overview: Describes the Digital Alpha VME 4 modules, which are based on the 21064A Alpha processor (224MHz or 288MHz), preconfigured with either 512 KB or 2 MB cache. It highlights the use of the Peripheral Component Interconnect (PCI) bus for high-performance SCSI, Ethernet, and VME interfaces, as well as support for industry-standard PCI mezzanine cards (PMCs). It also details functional, physical, and environmental specifications.
• Installation Procedures: Provides comprehensive instructions for unpacking, configuring switches (for VMEbus system controller role), installing memory and cache modules, and connecting various breakout modules and external cables (SCSI, network, console).
• Operation and Console: Explains how to operate the computer, including front panel controls and indicators. It introduces the UNIX-like console mode, how to enter and exit it, manage environment variables, boot operating systems (VxWorks, Digital UNIX), and update firmware.
• Diagnostics: Details the Power-On Self-Test (POST) and ROM-based diagnostics (RBDs), including SROM and console code tests. It provides LED display interpretations for diagnostic progress and failures, and offers troubleshooting guidance for common issues.

• Technical Descriptions of Subsystems:

  • System Address Mapping: Explains the 34-bit processor physical address space mapping to memory and I/O space, including PCI address translations.
  • Cache and Memory Subsystem: Describes the Bcache control, memory controller features (organization, timing, error handling), and associated control/status registers (CSRs).
  • PCI Host Bridge: Details the function of the 21071-DA chip as the bridge between the PCI local bus and the system bus, covering address decoding, buffering, burst transfers, data coherency, interrupts, and various features.
  • PCI Bus Components: Describes the integrated Ethernet (DECchip 21040-AA) and SCSI (NCR 53C810) controllers, and the optional PMC I/O Companion Card.
  • Nbus: Covers the ISA-like Nbus interface, including the Super I/O chip, keyboard/mouse controller, time-of-year (TOY) clock, interval timers, watchdog timer, and nonvolatile RAM (NVRAM).
  • VME Interface: Explains the VMEbus master and slave operations, system controller functions, byte swapping, and initialization procedures for the VME interface.
  • System Interrupts: Describes the overall interrupt structure, including the Xilinx, VIC64, and SIO chip interrupt controllers, and module reset events.

• Console Commands: Provides an extensive dictionary and explanation of all commands available in the console environment, useful for system configuration, diagnostics, and basic file operations.

• Connector Pinouts: Includes detailed pinout information for all major module connectors.

In essence, this manual serves as a comprehensive technical reference for understanding, installing, and managing the Digital Alpha VME 4 series of single-board computers.