LU 6.2 API Application Programmer's Reference Guide (30294-90008)

Appendix B 181

Sample Programs

CICS Program (PL/I)

CICS provides a high-level command interface to the LU 6.2 verbs.

Table B-1 gives the mappings between the LU 6.2 verbs and the

equivalent CICS commands issued by the CICS TP.

The EXEC Interface Block (EIB) returns parameter values from the

LU 6.2 verbs to the PL/I TP. Table B-2 lists the EIB values used in the

PL/I TP and their meanings in the conversation.

Table B-1 Mapping of CICS Commands to LU 6.2 Verbs

LU 6.2 Verb CICS Command

MCGetAllocate

EXEC CICS EXTRACT PROCESS

MCRcvAndWait EXEC CICS RECEIVE

MCSendData

EXEC CICS SEND

MCConfirmed

EXEC CICS ISSUE CONFIRMATION

Table B-2 Meanings of EXEC Interface Block Values

EIB Value Meaning

EIBFREE The remote TP called MCDeallocate to end the

conversation normally.

EIBCONF

The remote TP called MCConfirm< to request conﬁrmation.

EIBEOC

End-of-chain indicator.

EIBCOMPL The CICS TP has received a complete data record.

EIBRECV The CICS TP is in Receive state.