"Except each application running in the environment would need to be modified."
No. Those applications that ran in linemode would continue to run in line mode. Thos applications that ran with TN3270 would continue to run with TN3270. It's only the existing 3270 applications, e.g., ISPF, that IBM wanted to run with X11 that would need to be modified. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of David Boyes <[email protected]> Sent: Monday, March 19, 2018 4:10 PM To: [email protected] Subject: Re: z/OS "interactive computing" - AKA TSO/ISPF or UNIX shell > If you want a break with 3270, why a Rube Goldberg with line mode. Make the > application an X11 client instead. Except each application running in the environment would need to be modified. The approach I suggested doesn't require any application code to be modified if you don't want/have to. It also would allow ordinary terminals to replace most real 3270s that aren't operator/service processor consoles (ASCII terminal controllers like the 7171 or 3174 AEA feature notwithstanding - if you had a 7171, you could probably get rid of the operator consoles too). > We'd all be better of if SUN's paradigm of the thin client (X11 server) had > caught on. Kinda. Any GUI is going to be more processor-intensive than a character mode application; there's just more data to move. Moving the UI to a universal well-documented interface like X11 would have been nice, but too few systems at the time supported it (and at that time, the IBM TCP on MVS implementation probably would have rolled over and croaked if asked to support that kind of load; they were deep in the SNA vs TCP wars at the time and IBM didn't want TCP to look good in any way). ---------------------------------------------------------------------- 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
