I suspect CP EXIT 1200 will do what you want. Look in the ZVM 3.1 CP Exit Customization manual. It requires assembler skills to use it effectively.
I have one in use here. I received the skeleton from someone in this list and I'm sorry for not remembering his/her name. I'll share mine with you if you want it. Good Luck. _______________________ Jim Hughes 603-271-5586 "Impossible is just an opinion."