A vendor has to decide the minimum required hardware for his software. IBM chooses the minimum for the versions of z/OS, z/VM, z/VSE, z/TPF, and its other software. Cobol 5 requires PDSEs ,etc. A company might have to run on older hardware if they have a DR site with an older computer. 31 bit operating systems can run on processors up to z12. z13 won't run them. S/370 virtual memory 24 bit address programs are still running without recompiling.
On Tue, Apr 7, 2020 at 3:54 AM R.S. <[email protected]> wrote: > > W dniu 30.03.2020 o 00:40, Grant Steele pisze: > > Impressed with the depth on this list from the contributors. I am getting > > back into the z-series software and application development after years of > > being in another domain. > > > > Here is a very broad question: when you guys/girls are moving your app > > portfolio from one hardware platform to another (say, z14 to z15), to what > > extend are the apps compatible with the new platform without recompilation? > > There are many answers, let me also do this: > > You said "Code". That could mean many different things, let's assume you > mean application code, written in COBOL or PL/I. > You also said "changing platform". Let's assume we talk about EC12 -> > z15, or z13 -> z15, or z14 -> z15, but not ES9000 to z15 or AS/400 to z15. > In that case YOU DON'T HAVE TO RECOMPILE the code. It will work. > However new compilers can give you better performance when you recompile > the code with parameter "platform=z15". Note: such code will no work on > older platform, but it will work on newer platform. The assumption is > simple: it is likely you will move from current machine to next model. > It is unlikely you will move back. > > -- > Radoslaw Skorupka > Lodz, Poland > > > > > > ====================================================================== > > Jeśli nie jesteś adresatem tej wiadomości: > > - powiadom nas o tym w mailu zwrotnym (dziękujemy!), > - usuń trwale tę wiadomość (i wszystkie kopie, które wydrukowałeś lub > zapisałeś na dysku). > Wiadomość ta może zawierać chronione prawem informacje, które może > wykorzystać tylko adresat.Przypominamy, że każdy, kto rozpowszechnia > (kopiuje, rozprowadza) tę wiadomość lub podejmuje podobne działania, narusza > prawo i może podlegać karze. > > mBank S.A. z siedzibą w Warszawie, ul. Senatorska 18, 00-950 > Warszawa,www.mBank.pl, e-mail: [email protected]. Sąd Rejonowy dla m. st. > Warszawy XII Wydział Gospodarczy Krajowego Rejestru Sądowego, KRS 0000025237, > NIP: 526-021-50-88. Kapitał zakładowy (opłacony w całości) według stanu na > 01.01.2020 r. wynosi 169.401.468 złotych. > > If you are not the addressee of this message: > > - let us know by replying to this e-mail (thank you!), > - delete this message permanently (including all the copies which you have > printed out or saved). > This message may contain legally protected information, which may be used > exclusively by the addressee.Please be reminded that anyone who disseminates > (copies, distributes) this message or takes any similar action, violates the > law and may be penalised. > > mBank S.A. with its registered office in Warsaw, ul. Senatorska 18, 00-950 > Warszawa,www.mBank.pl, e-mail: [email protected]. District Court for the > Capital City of Warsaw, 12th Commercial Division of the National Court > Register, KRS 0000025237, NIP: 526-021-50-88. Fully paid-up share capital > amounting to PLN 169.401.468 as at 1 January 2020. > > ---------------------------------------------------------------------- > 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
