IBM 3270 Information Display System 3274 Control Unit Description and Programmer's Guide

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This publication provides system level reference material related to the functional and programming characteristics of the IBM 3274 Control Unit and attached terminals.

The first two chapters deal with the 3274 models, host attachments, the 3274 interpretation and execution of the commands and orders contained in the 3270 data stream, and the characteristics of the previously referenced 3270 system terminals when attached to the 3274 Control Unit.

The next three chapters address the functioning of the 3274 and attached devices when locally attached to the host system (3274 Models IB and ID), when remotely attached to the host system using BSC (Bisynchronous communication protocol) for communication (3274 Models IC and 51C), and when locally attached (3274 Model lA) or remotely attached (3274 Models IC and 51C) to the host
system using SNA/SDLC protocols for communication.

The final chapters provide programming examples of the 3270 data stream including use of programmed symbols, color capabilities, and highlighting of fields on the display screen. Suggestions for handling terminal operator input and development routines for encoding and decoding messages from the displays are also discussed.

Reference Number : GA23-0061-0

Date Published : November 1980

Manufacturer : IBM

Platform : IBM

Format : PDF






This exhibit has a reference ID of CH16477. Please quote this reference ID in any communication with the Centre for Computing History.

IBM 3270 Information Display System 3274 Control Unit Description and Programmer's Guide

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