There may be a delay for EOV processing. AFAIK there is never a delay for 7F.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [[email protected]] on behalf of Ed Jaffe [[email protected]] Sent: Friday, March 19, 2021 2:25 PM To: [email protected] Subject: Re: Overlapped I/O completion On 3/19/2021 11:09 AM, Joseph Reichman wrote: > Hi > > When doing overlapped I/O is there a way to tell if the I/O had completed on > the subsequent reads > > I check to see if the first fullword has been populated by the BDW The DECB that you issue CHECK against contains an actual embedded ECB at offset +0. There is an implied WAIT inside CHECK, but you can certainly inspect the POST bit yourself and/or WAIT on the ECB yourself using whatever mechanisms you have available (such as placing its address into a larger WAIT list). Once the WAIT has been satisfied, you still need to issue CHECK, but it runs immediately without suspending... -- Phoenix Software International Edward E. Jaffe 831 Parkview Drive North El Segundo, CA 90245 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
