On Tue, Nov 17, 2009 at 5:39 AM, Alan Altmark <[email protected]> wrote:
> Sorry. I thought I knew what you meant. :-) A program interrupt loop is > detected when there is a program check and the current PSW is the "same" > as the Program New PSW. This indicates that there is something wrong with > Program New PSW or there's not a valid instruction at the address pointed > to by the PNPSW. I stand corrected. CP is not able to detect a program check in the handler other than an invalid new PSW. If it's not wiped out, the my bet would be on a BC-mode PSW. If CP D PSW ALL does not show you, a TRACE PROG should. Rob
