The following diagram shows the major control blocks used to support the CICS®-DBCTL interface:
The DL/I interface parameter list (DLP) is described in DL/I interface parameter list (DLP).
The DBCTL global block (DGB) is acquired, from storage above the 16MB line, when the CICS-DBCTL interface is first initialized. It lasts for the remainder of the CICS execution.
The DBCTL scheduling block (DSB) is acquired, from storage above the 16MB line, when a task issues a PSB schedule request to DBCTL; that is, the PSB used does not appear in the remote PDIR. The DSB is freed at task termination.
See the CICS Data Areas manual for a detailed description of these control blocks.
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