>> Once your minimum supported operating system enables use of a particular semi-privileged instruction, then you can use it just the same as you would any new macro-based system service provided by that same level of the OS.
Well said (with the restrictions Ed pointed out) I see no reason not to use SPKA to go in and out of user key in CICS or use the linkage stack (where appropriate). It would be nice if there would be a way to temporary suspend (make it impossible to use) the linkage stack... Could have avoided lots of headache..... Steve- what about SAC (q) - should its used be banned as well? -- Martin Pi_cap_CPU - all you ever need around MWLC/SCRT/CMT in z/VSE more at http://www.picapcpu.de
