Overview DUMAPD – Display UCB Mapped for MVS38J / ISPF v 2.x / Hercules(current version 0.9.00  2025-09-06) The idea of displaying UCB (Unit Control Block) percolated from programmatically scanning of the UCB in my MVS 3.8J software development hobby projects! As mentioned, the thought occurred while setting the address of the UCB Lookup Table and pointing to the first UCB … Continue reading DUMAPD in MVS38J