No. I was thinking that if one wanted to one could design an unnecessary ECB into the communication path somewhere just so one would feel at home with the ancient access method artifacts. Having an ECB does not require than any code ever WAIT on it, of course. It's just another place to have a flag bit that means I/O is finished. Bill Fairchild Franklin, TN
----- Original Message ----- From: "Shmuel Metz (Seymour J.)" <[email protected]> To: [email protected] Sent: Tuesday, November 5, 2013 9:39:34 AM Subject: Re: Security exposure of zXXP was Re: zIIP simulation In <[email protected]>, on 11/04/2013 at 04:56 PM, DASDBILL2 <[email protected]> said: >SRBs can do I/O. They can't do SVC instructions, however. You >can start an I/O request without an SVC if you use the STARTIO >macro, which requires your code's being authorized. You can know >when the I/O is complete by testing an ECB's ECB? We don't need no stinking ECB. Were you thinking of EXCP[VR}, which does use an ECB? -- Shmuel (Seymour J.) Metz, SysProg and JOAT ISO position; see <http://patriot.net/~shmuel/resume/brief.html> We don't care. We don't have to care, we're Congress. (S877: The Shut up and Eat Your spam act of 2003) ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
