Introduction; General - AT&T 3B2 Off-Line Diagnostic Manual

General
This manual contains the diagnostic phases and tests that run on the AT&T 3B2 computer system.
Diagnostics are available for all versions of the System Board (SBD), the Math Accelerator Unit (MAU),
the Small Computer System Interface (SCSI), and the feature cards that can be plugged into the 3B2
computer.
Standard Format
To ensure consistency, each phase and test description are presented in a standard format. Each
phase description defines the phase name, type, and function. A list of the associated tests, as well as
the approximate times required to run them, is also provided. Any important warnings and notes about
a phase are also given. The standard phase format is as follows:
Phase Name:
Type:
Function:
Test(s):
Time:
Warnings:
Notes:
Each individual test description provides the test number, its function, and the procedure it uses.
The hardware tested and any data returned are also noted in the test description. Any notes about a
test are also given. The following shows the standard test format:
Test Number(s):
Function:
Procedure:
Hardware Tested:
Data Returned:
Notes:
Conventions
This document contains sample displays which will help you understand described procedures.
The sample displays in this document and the displays on your terminal screen may differ slightly due
to improvements in the product after this document was published. Therefore, use the displays in this
document as samples of the types of data available. However, the data displayed on your terminal
screen accurately reflects the software on your computer. The following conventions are used in this
manual to show your terminal input and the system output.
INTRODUCTION 1-1