Pathway/iTS TCP and Terminal Programming Guide

Programming for Specific Terminals

Compaq NonStop™ Pathway/iTS TCP and Terminal Programming Guide—426751-001

3-12

Using 6530 Terminals

The 6530 terminal has all the capabilities of the 6520 terminal plus some additional

features. The considerations discussed previously for the 6520 also apply to the 6530.

These include the rules for controlling the screen mode and the rules for positioning the

screen fields.

The 6530 terminal is upwardly compatible with the 6520. Program units compiled for a

6520 can be run on a 6530; however, features unique to the 6530 do not function on the

6520.

The 6530 terminal enables the use of other devices to put data into screen fields. For

more information about this ability, refer to the description of the RECEIVE clause in

the Compaq NonStop™ Pathway/iTS SCREEN COBOL Reference Manual.

Return-Key Function

Pathway/iTS can enable the Return key to behave as a function key when a SCREEN

COBOL program takes control of a 6530 terminal. For the RETURN-KEY function to

become effective, the program's SPECIAL-NAMES paragraph must contain a

RETURN-KEY phrase as the system-name parameter. The RETURN-KEY definition is

local to a SCREEN COBOL program and must be defined in the program or no

RETURN-KEY function exists. To use this function in a program that was previously

compiled, you must recompile the program and include the RETURN-KEY phrase. If a

program is defined for a 6520 terminal and run on a 6530 terminal, you cannot use the

RETURN-KEY function.

Table 3-4. Minimum Character Separation for 6520 Terminals

Second Element

First Element Field Literal Overlay Area End of Screen

Start of base screen 1 1 0 0

Start of overlay screen

occupying an overlay area that

does not have the same width

as its base screen *

11 0 0

Field 1 1 0 0

Literal 1 0 or 1** 0 0

Overlay Area 1 1 0 0

* When an overlay screen occupies an overlay area that does not have the same width as its base screen, an

overlay field cannot wrap from one line to the next.

** If two successive literals have the same attributes, no separation is necessary. Otherwise, at least one

position must separate them.