t...@harminc.net (Tony Harminc) writes: > Boeblingen got their hands slapped for anti-trust reasons for moving > the controllers inside (shades of the 2319 disk), or because corporate > inherently favoured Endicott over Boeblingen (and presumably POK over > both)? Or something else?
re: http://www.garlic.com/~lynn/2017.html#74 The ICL 2900 http://www.garlic.com/~lynn/2017.html#86 GREAT presentation on the history of the mainframe memory bus with generalized 9-positions for microprocessors (& microprocessor all the same) was much more advanced design than other IBM systems were (suppose to be) doing. which in part, made it straight-forward to do the 5-way SMP, past posts http://www.garlic.com/~lynn/submain.html#bounce note some of this would have been similar (but different) to effort later in the 70s to migrate the large number of different internal microprocessors to 801/risc (Illiad). past 801 posts http://www.garlic.com/~lynn/subtopic.html#801 because of the difficulty having all the unique development and operations for each unique microprocessor. I've previously told story after working on ECPS for endicott and 5-way SMP for Boeblingen, I got involved in doing 16-way SMP which lots of people thought was really great ... even getting 3033 processor engineers to work on it in their spare time (lot more interesting than remapping 168-3 logic to 20% faster chips) That is until somebody informed the head of POK that it could be decades before the POK favorite son operating system had (effective) 16-way support ... at which time some of us were invited to never visit POK again (and 3033 processor engineers to stop being distracted). IBM eventually ships 16-way system more than two decades later ... recent reference http://www.garlic.com/~lynn/2017c.html#30 The ICL 2900 past SMP posts http://www.garlic.com/~lynn/subtopic.html#smp -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
