1) If the psw points just beyond the last instruction and

2) noting that X'C1' is not valid op code

the a B or J to offset X'200' causes an 0C1

IBM Mainframe Discussion List <[email protected]> wrote on 12/14/2006 
04:15:29 PM:

>    That's my point. I get an 0c1 with the PSW pointing to a valid
> instruction.
> SYSTEM COMPLETION CODE=0C1  REASON CODE=00000001 
>  TIME=19.25.42  SEQ=09077  CPU=0000  ASID=0088 
>  PSW AT TIME OF ERROR  078D2000   800791C6  ILC 6  INTC 01 
>    ACTIVE LOAD MODULE           ADDRESS=00078FC0  OFFSET=00000206
>    NAME=DEBCIDID 
>    DATA AT PSW  000791C0 - C1F05010  41204110  00525E10 
>    GR 0: 00000000   1: 00000000 
>       2: 19C2C2A0   3: 19C28AF0 
>       4: 19C28148   5: 8005941C 
>       6: 19CFF888   7: 19C1DE70 
>       8: 80059456   9: 19C1DE60 
>       A: 19CFFBE0   B: 19C1DD88 
>       C: 80078FD0   D: 19C28100 
>       E: 800791BC   F: 0000000C 
>  END OF SYMPTOM DUMP 

> Sysview disassemble around offset 206:
> 000001FE          BNZ   496(,R12)                     4770 C1F0
> 00000202          ST    R1,288(,R4)                   5010 4120
> 00000206          LA    R1,82                         4110 0052
> 0000020A          AL    R1,296(,R4)                   5E10 4128
> 0000020E          AL    R1,992(,R12)                  5E10 C3E0


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