VAXstation I Technical Reference Manual

This document is the VAXstation I Technical Reference Manual (Preliminary, November 1984) by Digital Equipment Corporation.

The manual serves as a comprehensive technical guide for the VAXstation I, a single-user video graphics workstation built around a MicroVAX I CPU and a special-purpose VCBO1 video controller.

Key areas covered include:

1. General Information: Provides an overview of the VAXstation I system, detailing its physical description and comprehensive specifications for core components such as the VCBO1 module, BA23-A system box, VR100 monitor, VS10X mouse, LK201 keyboard, and mass storage devices, along with power and bus load requirements. It also includes an FCC Class A compliance notice regarding radio frequency emissions.
2. System Configuration: Describes how the system is configured, including details on the H9278-A backplane, the KD32-AB CPU (M7135-YA Data Path and M7136 Memory Controller modules), MSV11-QA memory, RQDX1 mass storage controller, RX50 diskette and RD52 fixed-disk drives, the VCBO1 video controller, and various operator I/O devices (monitor, keyboard, mouse, printers). It also covers optional modules like the DEQNA Ethernet controller and DZV11 asynchronous line multiplexer, including their switches and jumpers.
3. VCBO1 Functional Description: Offers a detailed technical breakdown of the VCBO1 Video Controller. This includes its timing mechanisms, Q22-bus/CPU interface, internal interrupt controller and registers (CSR, CRTC, UART), video memory architecture (256 kB bit-mapped RAM, scan line map, update, video, and RAM refresh), cursor control, and interfaces with the mouse and keyboard. It also describes the functional aspects of the VR100 monitor, including its power supply, video module, and deflection module.
4. Programming Information: Explains the programmable functions of the VCBO1, detailing its address space within the MicroVAX physical address space and providing in-depth descriptions of its various registers and their bit configurations, relevant for software control.
5. Maintenance: Outlines the maintenance strategy (Field Replaceable Unit - FRU replacement), describes service features, and details diagnostic procedures. This includes information on Microverify (power-up self-tests), standalone diagnostics (Macroverify, CPU, Memory diagnostics), and VDS (VAX Diagnostic Supervisor) diagnostics for the VCBO1. It also covers monitor LED indicators and step-by-step monitor adjustment procedures for alignment and focus.
6. Replacement: Provides step-by-step procedures for the removal and replacement of major system components, such as backplane modules, storage subsystem drives (RD52, RX50), the power supply, backplane and signal distribution panel, cooling fans, patch and filter panel, front control panel, and monitor sub-assemblies. A comprehensive list of part numbers for replacement components is included.

The document also contains a Glossary of terms and an Index for easy reference. Note that the manual explicitly states it does not cover VAXstation I installation or normal operation, referring users to the Owner's Manual for that information.