44 Rocket Model 204 Terminal User’s Guide
Overview
Each of these terminals provides slightly different capabilities, responses, and
default parameter settings. The information supplied for these terminals in
Chapter 3 does not necessarily apply when the terminals are used through
CICS.
Host language applications
Some host language application programs that communicate with Model 204
through the IFAM interface can be run as CICS transactions. Refer to the
Model 204 Host Language Interface Reference Manual and the CICS system
documentation for information about using host language application
programs.
Selection of terminal support mode
Two modes of CICS support are available to Model 204 users of IBM 3270
terminals: full-screen and line-at-a-time. Full-screen terminals allow the entire
screen to be formatted and displayed as a single entity while line-at-a-time
terminals print all screen inputs and outputs on a line-by-line basis.
To select the desired mode for an installation, your system manager must do
the following:
• Assemble, link-edit, and install the appropriate CICS transactions.
• Set the IODEV parameter on the user’s parameter line for the terminal,
specifying 11 for full-screen CICS usage and 29 for line-at-a-time.
For more information about these system manager actions, see the Model 204
Installation Guide for your operating system and the Model 204 System
Manager’s Guide.
Much of the information in this chapter is presented according to terminal
IODEV setting. IODEV 11 terminals are full-screen and IODEV 29 terminals are
line-at-a-time. For the general features of full-screen and line-by-line terminal
processing, see Chapter 1.
Note: If CICS cannot establish a connection for full-screen usage, the interface
attempts to establish a line-at-a-time (sequential) connection, as described in
“When full-screen login fails” on page 46. The decision whether or not to
attempt a line-at-a-time connection depends on the configuration of the full-
screen interface. For more information about this configuration, see your
system manager.
Additional print capabilities
In addition to print capabilities described in this chapter, the DEFINE PRINTER
and USE PRINTER commands also can be used to direct output to CICS 328x-
and TTY/TWX-type printers.
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