I Just finished turning in grades for the latest semester, and now I have a bit more time for adding to the blog. Want to know more about S0C4 abends? Then this video is for you. You can also find the code for the video along with lots of other videos here. More debugging videos are on the way, so check back soon.
Debugging an S0C4
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Hi Love the website and content and bought the book. I learn’t assembler in the 70s (BAL) and as a sysprog used it infrequently – exits etc. Now I am trying to get it back and update it. The book has been invaluable. I tried to use IPCS to debug some simple code – (creates an 0C6) but got no fail data – missing SDWA. Found a hit on a mainframe site that suggested coding:
LOAD EP=IEFBR14
LR R2,R0
ESTAE (2),CT,SDWALOC31=YES
after normal program housekeeping, it seems to work I got the dump and the SDWA was found. This side of things is something I was always a bit week on, do you have any info on why this works? Also you refer to a John Erhman book, that seems to be unavailable, but revered. Any idea how I can get a copy (the link doesn’t work for me)
Lastly – are you going to do an advanced assembler book to join the big blue book?
Thanks Dave