VAXstation 3520/3540 DWFQA (Q-bus Adapter) Module Addendum

This document is an addendum for the VAXstation 3520/3540, specifically detailing the DWFQA (Q-bus Adapter) module.

Key points:

• Purpose of DWFQA: It enables the VAXstation 3520/3540 to use Q-bus communication and tape data storage options by providing a communications link between the system's M-bus and Q-bus modules.
• Module Capacity & Location: The DWFQA module occupies slot 9 of the system backplane and supports up to four Q-bus option modules, though a maximum of three can be installed simultaneously in slots 10 through 12.

• Supported Q-bus Options: The document describes several compatible Q-bus options, including:

  • DSV11 synchronous I/O controller (for high-speed network connections).
  • CXY08 asynchronous multiplexer (for data concentration and terminal handling).
  • TK70 magnetic streaming tape drive subsystem.
  • TS05 magnetic streaming tape drive.

• Software Support: It outlines which of these Q-bus options are supported on VMS (Virtual Memory System) and ULTRIX operating systems, noting that VMS 5.2 or ULTRIX UWS 2.1 is required for DWFQA support.

• Third-Party Options: Digital does not officially support third-party options but provides technical conditions (e.g., DMA rates, timing specifications) that third-party modules must adhere to for potential compatibility.
• System Configuration: Instructions are provided on how to use TEST 50 and TEST 50 0 commands at the console prompt to identify installed M-bus and Q-bus modules and their locations within the system.
• Ordering Information: The document includes tables listing part numbers for field replaceable units (FRUs), complete hardware option kits, and related hardware documentation.

The document was first printed in September 1989 by Digital Equipment Corporation.