CHAPTER 3: Features and Applications
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3. Features and Applications
This chapter covers the features and applications of the LinkUp 5294.
3.1 Display Emulation Support
The LinkUp 5294 enables almost any ASCII terminal or personal computer and word processor (with
the appropriate terminal emulation software installed) to appear to your System/3X host as an actual
5251 Model 11, 5291, or 5292 Display Workstation. It accomplishes this through a variety of Terminal
Modules.
A Terminal Module is a device driver which is designed after a specific ASCII terminal type, with some of
the terminal type’s unique features incorporated into the module in order to optimize its performance.
NOTE
Any terminal (or terminal emulation software) capable of simulating the terminal type of
a specific module can also be supported by that module. See Appendix D for a
complete list of the various terminals, personal computers, and word processors
currently supported by the LinkUp 5294.
Each Terminal Module has a full implementation of all of the 5250 screen handling facilities, such as
attributes and cursor positioning, and most of the keyboard functions. The specific display attributes
supported by the LinkUp include the following:
• Reverse Image
• Column Separator
• Non-display
• High-Intensity
• Blink
• Underscore
Any combination of these is also possible.
However, these facilities are supported only as well as the terminals in your application support them. In
other words, if the terminal in your application does not support one of the listed attributes, the LinkUp
5294 cannot implement that attribute for the terminal.
Another feature is Screen Optimization. Instead of clearing and repainting a terminal’s screen of data
for every new update, the LinkUp simply repaints the terminal’s screen with only the updated new
characters, keeping the amount of screen painting to a minimum.
