[email protected] (Graeme Gibson) writes: > Well, let's not skew the kiddie's brains too much..
re: http://www.garlic.com/~lynn/2011f.html#12 New job for mainframes: Cloud platform yes, well ... I thot it was also interesting that 2702 (IBM line scanners) managed to (also) reverse bits within bytes (before x86 even appeared on the scene). other trivia was HP had major hand in Itanium (designed to be dual-mode ... both big-endian & little-endian) ... which at one time was going to be the "mainframe killer" ... since then lots of Itanium business critical features have been migrated to XEON chips (and various recent news items projecting death of Itanium). major person behind wide-word & Itanium had earlier been responsible for 3033 dual-address space mode ... retrofitted a little of 370-xa access registers to 3033 to try and slow the exploding common segment problem (with 24-bit, 16mbyte virtual address space ... and MVS kernel image taking half of each virtual address space ... large installations were approaching situation where CSA was going to be 6mbytes ... reducing space for applications to 2mbytes). itanium stuff http://www.hpl.hp.com/news/2001/apr-jun/worley.html other pieces from wayback machine: http://web.archive.org/web/20010722130800/www.hpl.hp.com/news/2001/apr-jun/2worley.html http://web.archive.org/web/20000816002838/http://www.hpl.hp.com/features/bill_worley_interview.html internal IBM had some critical chip-design tools implemented in Fortran running on large number of carefully crafted MVS systems ... and were having increasingly difficult time to keep the application under 7mbytes (MVS kernel image at 8mbytes and minimum CSA size was 1mbyte, leaving maximum of 7mbytes for applications) ... they were being faced with having to convert the whole operation to vm/cms ... since that would allow them to have nearly whole 16mbytes for application. -- 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: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
