Robert Ngan writes: > Not sure why no one has mentioned the COMPARE AND TRAP type instructions, in > most(?) cases they'll do the test and force the abend when required.
If you have to write product code that still works for CMS users in ESA mode, then COMPARE AND TRAP is not an option. It needs z10 or above, which I think is part of the architectural level set required by z/OS 2.2 so if you are on that level or above it is safe to use. > My only gripe is there's no extended mnemonic for an unconditional TRAP when > there's no appropriate "compare" (e.g. I need to do a TM). I've never used it myself, but I think the simplest way to code an unconditional trap is to use CRTE 0,0 or similar, using two references to the same register which are certain to compare equal. Jonathan Scott, HLASM IBM Hursley, UK
