DEC 7000/10000 AXP VAX 7000/10000 Platform Technical Manual

This technical manual serves as a reference for Digital service engineers, detailing the platform architecture, LSB bus, and power, cabinet control, and cooling systems of the DEC 7000/10000 AXP and VAX 7000/10000 systems.

The document covers:

• Platform Overview: Describes the physical cabinets (DEC 7000/VAX 7000 and DEC 10000/VAX 10000 variants), their components (LSB card cage, power system, control panel, blower, plug-in units), and their basic functions.
• LSB Bus: Provides comprehensive details on the LSB (Limited-length, Synchronous Bus), which is the system's central bus. This includes its specifications, module identification, signal definitions, distributed arbitration scheme (processor and I/O arbitration), bus cycles (command and data), bus transactions, memory bank mapping, addressing, cache memory protocols (states, changes, write operations), dedicated registers, console and initialization procedures (power-up, resets, self-tests), and various error detection and recovery mechanisms.
• Power, Cabinet Control, and Cooling Systems: Explains the power infrastructure (AC input, DC distribution, power regulators, uninterrupted power supply, module regulators, 48V DC bus), the cabinet control logic (CCL) responsible for power sequencing, serial communications, and monitoring, and the cooling system (blower operation and airflow).
• Appendices: Provide in-depth information on CCL cables and Equivalent Power Unit (EPU) calculations.

In essence, the manual offers a deep technical dive into the hardware and bus protocols crucial for servicing and troubleshooting these specific Digital Equipment Corporation computer systems.