I am working on a client system that has MVS/SP era Utilities developed by a third party using SVC99 to do Dynamic allocation for COBOL programs. It still works.
So, yes old MVS/SP era code can as long as it doesn’t use discontinued instructions (i.e., SIO) or depend on obsolete text units (which are ignored as long as they are syntactically correct) and similar. Sent from my iPhone — small keyboarf, fat fungrs, stupd spell manglr. Expct mistaks > On Dec 16, 2019, at 4:47 PM, Rupert Reynolds <rreyno...@cix.co.uk> wrote: > > Another question, purely out of interest: > Can the old MVS/SP code still run unchanged? > I reminisced with a friend about the day he whinged about a 64k code > segment size on Intel micros and I out-whinged him with a 4k code CSECT :-) > > Can a modern z/OS installation still assemble, link and run the old stuff, > such as the typical local utilities we all saw: > > MYPROG CSECT > MYPROG RMODE ANY > MYPROG AMODE 24 > STM 14,12,12(13) > USING ... > > If so, that's quite an achievement, both in the changes and the flexibility > of the original design! > > Rupert > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
