AM3270/TR3271 Reference Manual

Contents
086705 Tandem Computers Incorporated v
Preface xi
Notation Conventions xiii
Section 1 Bisync Protocols—Concepts and Terminology
What are Bisync Protocols? 1-1
Standard Bisync Communication—How It Works 1-2
The Message Block 1-3
Transmission Control Characters 1-5
EBCDIC and ASCII Control Characters 1-7
Bisync Procedures 1-8
Error Checking (Block Checking) 1-8
Polling and Selecting 1-9
Transparent Mode 1-13
For More Information 1-14
Section 2 Overview of AM3270 and TR3271
What Are AM3270 and TR3271? 2-1
When Are They Used? 2-1
List of Supported IBM CUs 2-2
Subsystem Components 2-2
Level 4 Protocols 2-2
ITI Protocol 2-3
PTP Protocol 2-3
CRT Protocol 2-4
PRT Protocol 2-4
QUO Protocol 2-4
Section 3 A Closer Look at AM3270
Overview 3-1
Examples 3-1
Subdevices 3-2
Configuration and Control 3-2
Subdevice Access 3-2
AM3270-Specific File-System Operations 3-3
Poll/Read Operation 3-3
Select/Write Operation 3-5
AM3270 Product Environment 3-6