CICS ⭐ Featured
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Q: What is EIB?

Answer:
EIB (Execute Interface Block) contains execution info. EIBCALEN=COMMAREA length. EIBTRNID=transaction. EIBAID=attention key. EIBDATE/EIBTIME=date/time. EIBRESP/EIBRESP2=response codes. Automatically available in COBOL.
eib interface block
CICS ⭐ Featured
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Q: How to check EIBAID?

Answer:
EIBAID shows attention key pressed. Compare with DFHENTER, DFHPF1-24, DFHCLEAR, DFHPA1-3. Example: IF EIBAID = DFHPF3 do-exit. Determines user action on screen.
eibaid key attention
CICS
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Q: What is RECEIVE MAP?

Answer:
EXEC CICS RECEIVE MAP(name) MAPSET(mapset) INTO(symbolic-map). Gets terminal input. Modified fields only (MDT). Check EIBAID for key pressed. MAPFAIL if no data. Symbolic map populated with input.
receive map input
CICS
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Q: Explain CICS RECEIVE without MAP

Answer:
RECEIVE INTO without MAP gets raw terminal data. EXEC CICS RECEIVE INTO(area) LENGTH(len). For non-BMS screens. AID in EIBAID. Raw data stream. Lower level than BMS.
receive terminal raw