First byte Of DECB/ECB was x’7F’ 40 bit ( posted bit was on )
> On Mar 19, 2021, at 2:25 PM, Ed Jaffe <[email protected]> wrote: > > 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 > https://www.phoenixsoftware.com/ > > > -------------------------------------------------------------------------------- > This e-mail message, including any attachments, appended messages and the > information contained therein, is for the sole use of the intended > recipient(s). If you are not an intended recipient or have otherwise > received this email message in error, any use, dissemination, distribution, > review, storage or copying of this e-mail message and the information > contained therein is strictly prohibited. If you are not an intended > recipient, please contact the sender by reply e-mail and destroy all copies > of this email message and do not otherwise utilize or retain this email > message or any or all of the information contained therein. Although this > email message and any attachments or appended messages are believed to be > free of any virus or other defect that might affect any computer system into > which it is received and opened, it is the responsibility of the recipient > to ensure that it is virus free and no responsibility is accepted by the > sender for any loss or damage arising in any way from its opening or use. > > ---------------------------------------------------------------------- > 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
