And testing reveals that the answer is that it IS interpreted as a 3270 datastream, partially. The following Rexx, running under ISPF
/* Rexx */ say 'some stuff ************************************' say 'f5c311404040'x||'Hellow clear world!' say 'more stuff' say 'and still more' produces the following at the top of the screen. Hellow clear world! *************************** 5C more stuff and still more *** My interpretation is - the F5C3 is ineffective. The command has to be the first thing in the 3270 DS and Rexx and/or TSO already provides that. - However, the SBA (0,0) has the desired effect. Notice that my first SAY has been (partially) overwritten - I can't explain why the F5C3 comes out *after* "Hellow clear world!" Can anyone else? I am not sure if I have not made a mess of TSO's unformatted screen management. I wonder if TSO's "time to clear the screen" line count may be thrown off. On Thu, 18 Jun 2026 15:46:18 +0200, salva <[email protected]> wrote: > It is easier to test it—it's just half a line—than to drop the dogma. > >El jue, 18 jun 2026 a las 10:34, Seymour J Metz (<[email protected]>) escribió: > >> It's irrelevant; it won't be interpreted as a 3270 display stream. >> >> -- >> Shmuel (Seymour J.) Metz >> http://mason.gmu.edu/~smetz3 >> עַם יִשְׂרָאֵל חַי >> נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר >> >> >> >> >> ________________________________________ >> From: IBM Mainframe Discussion List <[email protected]> on behalf >> of Martin Packer <[email protected]> >> Sent: Thursday, June 18, 2026 4:24 AM >> To: [email protected] <[email protected]> >> Subject: Re: Two TSO terminal I/O from Rexx questions >> >> >> External Message: Use Caution >> >> >> For those of us unfamiliar with 3270 data streams can somebody decode the >> hex before the readable text. Thanks! >> >> From: IBM Mainframe Discussion List <[email protected]> on behalf >> of salva <[email protected]> >> Date: Thursday, 18 June 2026 at 07:43 >> To: [email protected] <[email protected]> >> Subject: [EXTERNAL] Re: Two TSO terminal I/O from Rexx questions >> >> 1. You can play with: >> say 'f5c311404040'x||'Hellow clear world!' >> (your result may change based on your Logmode, I can't do an empty say >> 'f5c311404040'x. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
