DSV11 Technical Manual

This document is the Technical Manual for the DSV11 synchronous communications controller, developed by Digital Equipment Corporation (DEC) and published in January 1987.

The manual provides comprehensive information on the installation, use, programming, and service requirements of the DSV11.

Key aspects of the DSV11 and the document's content include:

• Functionality: The DSV11 is a 2-line synchronous communications controller for Q22-bus systems (e.g., MicroVAX II). It can handle two lines simultaneously at up to 64,000 bits/s each, or a single line at up to 128,000 bits/s (HDLC only).
• Protocols & Standards: It supports a wide array of interface standards (e.g., RS-232-C, RS-422, RS-423, RS-449, V.24, V.35, V.36, X.26, X.27) and synchronous protocols like DDCMP, HDLC (including SDLC), and BISYNC, including full modem control.
• Architecture: It uses NRZ and NRZI data encoding, performs 16-bit CRC generation and checking, and transfers data via DMA (Direct Memory Access). The module is controlled by a 68000 microprocessor with ROM-based firmware, and most functions are programmable.
• Physical Form Factor: It is a quad-height Q22-bus module (M3108).
• Document Structure: The manual is organized into five main chapters and four appendices:
  • Introduction: Provides an overview, specifications (environment, electrical, performance, data rates, throughput), and details on its various interfaces and functional description.
  • Installation: Guides users through unpacking, checking settings, installing the module, connecting cables and distribution panels, and initial testing.
  • Programming: Covers device registers, command list structures, command functions, and programming features for host interaction.
  • Technical Description: Offers a detailed explanation of the DSV11's hardware components, including the Q-bus interface, serial interface, backport bus, control section, clocks, resets, and power supplies.
  • Maintenance: Outlines maintenance strategies, self-test diagnostics, MicroVAX II diagnostics, and troubleshooting procedures.
  • Appendices: Include descriptions of integrated circuits (ICs), the Q-bus Interface Chip (QIC), floating addresses, and a glossary of terms.