ISPF display screen size is also affected by the 'Terminal Characteristics' section at the bottom of the ISPF option 0 screen. See what you have set there.
Mike Shaw MVS/QuickRef Support Group Chicago-Soft, Ltd. On Mon, Dec 6, 2021 at 5:07 AM Christian Svensson < [email protected]> wrote: > 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 > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
