Partition support

Partitions are the first of several special hardware features that BMS supports. Standard BMS is required for partitions.

Some IBM® displays allow you to divide the screen into areas which you can write to and read from separately, as if they were independent screens. The areas are called partitions, and features of BMS that allow you to take advantage of the special hardware are collectively called "partition support".

The IBM 3290 display, which is a member of the 3270 family, and the IBM 8775 are the primary examples of devices that support partitioning. You should consult the device manuals9 to understand the full capabilities of a partitioned device, but the essential features are these:

In spite of the independence of the partitions, the display is still a single terminal to CICS®. You cannot have more than one task at a time with the terminal as its principal facility, although you can use the screen space cooperatively among several pseudoconversational transaction sequences if they use the same partition set (see Terminal sharing).

Note:
The 3290 can be configured internally so that it behaves as more than one logical unit (to CICS or any other system); this definition is separate from the partitioning that may occur at any one of those logical terminals.

This chapter describes:


9.
IBM 3290 Information Display Panel Description and Reference for the 3290 and IBM 8775 Display Terminal Component Description for the 8775.

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