z/Journal June / July 2010
June / July 2010

Ever since command-level programming was introduced in CICS in 1975, an in-memory process called the communications area (COMMAREA) has been used to pass data from one application to another. From its inception, the size of the COMMAREA was held in a half-word data field— the EIBCALEN—which limited the size of the COMMAREA to 32KB. Although this was a problem, since most application...

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