[email protected] (Gabe Goldberg) writes: > z/OS folk have an eight year head start on VMers, with predecessor > first versions announced 1964 and shipped 1965 -- so there should be > plenty of stories. Please keep 'em brief, to fit almost 50 years into > a short article.
old post about contacting people for stories about transition of os/360 to virtual memory (with a little earlier regarding HASP, ASP, etc) http://www.garlic.com/~lynn/2011d.html#73 possibly the biggest programming for MVT to OS/VS2 SVS transition ... was hit to EXCP to scan passed channel program, make a copy substituting real addresses for the virtual address. as mentioned initial implementation was to borrow CCWTRANS from CP/67. I also had some dust-ups with group designing virtual memory page replacement algorithm for SVS that carried into MVS. It wasn't until well into the MVS release cycle ... that it dawned on them that they were selecting high-use shared linkpack pages for replacement before lower use application data pages. -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
