When a program check happened, the first level interrupt handler would get control. It saves the PSW, registers and interrupt length code in LCCA.
If it is a translation exception, it set a recursive indicator.
If this is not the first time translation exception occurrence, special processing started. For the first recursion, load R1 with the master segment table and abend the address space. For the second recursion terminate the entire system and placed in wait state
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