Classification: Confidential Check the LOGMODE/DLOGMODE entries in VTAMLST
-----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Christian Svensson Sent: Monday, December 6, 2021 4:08 AM To: [email protected] Subject: What determines the effective terminal size? [CAUTION: This Email is from outside the Organization. Unless you trust the sender, Don’t click links or open attachments as it may be a Phishing email, which can steal your Information and compromise your Computer.] Hi folks, I am trying to go back to basics a bit and figure out some things that I have always treated as magic. Right now it is how a 3270 terminal connected to a z/OS determines the size of the terminal. In this case through OSA-ICC (zBC12, OSA-Express5) and not TCPIP, On systems where I have configured VTAM with TCPIP the terminal size seems to almost always "just work". Let's take a look at an example. I have configured X3270 with model "3279-4-E" and oversize set to "133x60". 1) What does the z/OS VTAM screen look like? Over OSA-ICC: 80x24 Over TCPIP: 80x24 So far so good. 2) What does the TSO screen look like? Over OSA-ICC: 80x24 Over TCPIP: 80x24 Ok, no change. 3) What does the ISPF screen look like? Over OSA-ICC: 80x24 Over TCPIP: 133x60 Oh! But why? I do not know! Also, after I exit ISPF back to TSO, the TSO screen is now correctly filling the full screen! I also note that z/VM's login screen seems to behave similarly. Over OSA-ICC the size seems to be fixed at 80x24, but over TCPIP it follows what I configured X3270 to use. Dialing a z/OS VTAM terminal through the z/OS login screen (connected via TCPIP) seems to result in a 133x60 screen both in TSO and ISPF. However if I ATTACH an OSA-ICC terminal straight to a z/OS guest, ISPF gets 133x60 but TSO only 80x24 - *but only if I reconnect to an existing user session.* If I log out and try to log in again I get IKT00405I "Screen erase caused by error recovery procedure". As you can see I am a mess when it comes to understanding how this all fits together! It seems pretty much random to me, except that TCPIP "almost always works" and OSA-ICC "almost never works". I would love to learn more, but I don't even know where to begin. Regards, ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ::DISCLAIMER:: ________________________________ The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. E-mail transmission is not guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or may contain viruses in transmission. The e mail and its contents (with or without referred errors) shall therefore not attach any liability on the originator or HCL or its affiliates. Views or opinions, if any, presented in this email are solely those of the author and may not necessarily reflect the views or opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of authorized representative of HCL is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any email and/or attachments, please check them for viruses and other defects. ________________________________ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
