Somehow I deleted the text of my reply. The significance of 1440 has nothing to do with the clock cycle; it's the number of minutes in a day.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of Lindy Mayfield <[email protected]> Sent: Thursday, September 26, 2019 10:53 AM To: [email protected] Subject: Re: Control block values that exempt 522 Timeouts It could have been hardware related based on clock speed on early machines. Perhaps it's more appropriate ask this on the RACF group. /Lindy -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Mike Schwab Sent: tiistai 17. syyskuuta 2019 18.35 To: [email protected] Subject: Re: Control block values that exempt 522 Timeouts EXTERNAL Well, if that represents 24 hours then 2555 is 1 second. On Tue, Sep 17, 2019 at 8:09 AM Lindy Mayfield <[email protected]> wrote: > > Hi, > > I understand that address spaces can be made exempt from 522 timeouts if > there is a particular value in one of three control blocks. If I have it > correct they are: > > 1) The JSTL is 86400 seconds (Comes from TIME=1440 on Job card?) > 2) The ASCBTOFF bit in the ASCBRCTF is set > 3) The SWTL contains the magic number x'0D286880' > > What can I learn from one or more of those values being set? For example, > which z/OS or application components update those control blocks or cause > them to be updated? > > Thanks in advance for any insight! > > Kind regards, > Lindy > > P.S. I think I asked some years ago where they magic number x'0D286880' > comes from. I forgot. I think it was historical, and maybe counted in > timerons or something similar. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to [email protected] with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
