User`s guide

DWMBB Adapter

The DWMBB XMI-to-VAXBI adapter provides an information path

between the XMI bus and I/O devices on the VAXBI bus.

This chapter contains the following sections:

• DWMBB Overview

• Address Translation

• I/O Transactions

• Interrupts

• VAXBI Wrapped Read Transactions

• Lockout Modes

• Commander Arbitration Using Responder Request

• Programmable Timeouts

• Programmable VAXBI I/O Window Space

• ECC Protection on the PMR Data Path

• DWMBB Adapter Registers

• Error Handling

• DWMBB Initialization

• Diagnostic Features

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