On Wed, 29 Mar 2017 13:58:34 -0400, Steve Smith wrote: >It was, but Binyamin has a good point. I didn't consider that FLIH would >be invoked in real mode, so the hypothetical data-space code could >theoretically survive until or unless the system turns DAT on for something >other than directly resuming your code.
I think not. The SVC New PSW is fetched from real address X'01C0', but I just had a look at that location on our system and the PSW there contains 04040000 80000000 00000000 01BA3F00. That has T=1 so DAT is on. In any case, your data space doesn't have an SVC New PSW at location 1C0. Nor does it have any of the other 5 New PSWs. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
