VAX 11/780 Hardware User's Guide

This document is the VAX-11/780 Hardware User's Guide, published by Digital Equipment Corporation in February 1979. It serves as a comprehensive manual providing basic hardware operating instructions and customer care information for the VAX-11/780 system.

The guide covers:

1. System Overview:

   • Hardware System: Details the core components including the Central Processor Unit (CPU) with its 32-bit microprogrammed architecture, native instruction set, and PDP-11 compatibility mode; the Main Memory Subsystem with Error Checking and Correction (ECC); and the I/O Subsystem comprising the Synchronous Backplane Interconnect (SBI), Massbus, and Unibus adapters for high-speed and general peripheral connectivity. An optional Floating-Point Accelerator is also described.
   • Console Subsystem: Explains its role as the operator's link to the CPU, featuring an LSI-11 microprocessor, RX01 floppy disk, and an LA36 terminal for system control and diagnostics.
   • Peripheral Devices: Describes various supported peripherals, categorized into Mass Storage (different disk drives like RP05/RP06, RM03, RK06, and TE16 magnetic tape), Unit Record (line printers and card readers), Terminals and Interfaces (LA36, VT52, DZ11), and Interprocessor Communication Links (DMC11).

2. System Operation:

   • CPU Cabinet Controls: Outlines the physical controls and indicators on the CPU cabinet and console control panel, including power supplies and LSI-11 indicators.
   • Bootstrapping: Explains the automatic process of system startup, detailing the various stages and terms involved (e.g., Console Boot, Primary Loader, WCS/ECO File).
   • Console Communication: Provides a detailed guide to the console command language, allowing operators to interact with the system. This includes commands for examining/depositing data, controlling CPU state (halt, step, start), setting defaults (addressing, data length, radix), repeating/linking commands, and remote console access.

3. Diagnostic and Peripheral Information:

   • Diagnostic Supervisor: Introduces the diagnostic supervisor program and its command language, which operators use to control diagnostic tests for troubleshooting the system. Commands for loading, starting, restarting, and debugging diagnostic programs are covered.
   • Peripheral Device Operating Information: Offers in-depth operational procedures, specifications, and maintenance guidelines for each peripheral device, including loading paper for printers, handling disk packs and cartridges, and managing magnetic tapes.

4. Appendices: Provide supplementary reference material on virtual memory concepts, detailed bootstrapping sequences, console help files (commands, abbreviations, error messages), microdebugger help, a comprehensive glossary of VAX/VMS terms, summaries of native and compatibility mode instruction sets, ASCII code, and a list of diagnostic programs.

The document serves as an essential resource for operating, troubleshooting, and maintaining the VAX-11/780 hardware system.