The following message is a courtesy copy of an article that has been posted to bit.listserv.ibm-main,alt.folklore.computers as well.
[EMAIL PROTECTED] (Van Dalsen, Herbie) writes: > And who came up with XA I/O? Amdahl, in order to do MDF and share > channels had to do floating I/O interrupts, and related control block > structures in HSA (a la XA) to get this to work. try 360/67 smp channel director for sharing channels and floating i/o interrupts ... 360/67 functional characteristics can be found here http://www.bitsavers.org/pdf/ibm/360/funcChar/ ... 360/67 had 24bit & 32bit addressing modes, also referenced in this post http://www.garlic.com/~lynn/2007t.html#75 T3 Sues IBM To Break its Mainframe Monopoly after future system was killed http://www.garlic.com/~lynn/subtopic.html#futuresys there was mad rush to get out 303x in parallel with starting on xa. the architecture documents for xa, subchannel infrastructure, access registers, et all were referred to as "811" ... from their nov78 publication date (aka 29yrs ago). I had fairly complete copy ... they were individually numbered copies, classified at the highest level ... requiring special double-lock security filecabinet and periodic auditing. apparently information about people with copies leaked out and several people were approached ... aka industrial espionage ... and the feds eventually were involved. part of it involved the extrodinary lead time to move mvs to anything ... reference to killing vm370 product because they needed all the developers moved to pok to help meet mvs/xa delivery schedule http://www.garlic.com/~lynn/2007t.html#68 T3 Sues IBM To Break its Mainframe Monopoly even before 811 documents were published we had put together a project to turn out a 16-way smp processor on a very aggresive delivery schedule. it was going great guns until it came to the attention of the head of pok that it would possibly be decades before mvs ever had 16-way smp support (some people were then invited to never show up at the pok site again). misc. past posts mentioning smp support (and/or compare-and-swap instruction) http://www.garlic.com/~lynn/subtopic.html#smp there was small advanced technology conference in pok spring of 77 (a little over 30yrs ago) with presentations on both 16-way smp and 801 risc ... for lots of topic drift, misc. 801 risc posts http://www.garlic.com/~lynn/subtopic.html#801 misc. post posts mentioning 811 http://www.garlic.com/~lynn/2000d.html#21 S/360 development burnout? http://www.garlic.com/~lynn/2002d.html#8 Security Proportional to Risk (was: IBM Mainframe at home) http://www.garlic.com/~lynn/2002d.html#9 Security Proportional to Risk (was: IBM Mainframe at home) http://www.garlic.com/~lynn/2002d.html#49 Hardest Mistake in Comp Arch to Fix http://www.garlic.com/~lynn/2002d.html#51 Hardest Mistake in Comp Arch to Fix http://www.garlic.com/~lynn/2002j.html#28 ibm history note from vmshare http://www.garlic.com/~lynn/2002k.html#34 30th b'day .... original vm/370 announcement letter (by popular demand) http://www.garlic.com/~lynn/2002m.html#28 simple architecture machine instruction set http://www.garlic.com/~lynn/2002n.html#58 IBM S/370-168, 195, and 3033 http://www.garlic.com/~lynn/2003c.html#1 Wanted: Weird Programming Language http://www.garlic.com/~lynn/2004c.html#6 If the x86 ISA could be redone http://www.garlic.com/~lynn/2004g.html#24 |d|i|g|i|t|a|l| questions http://www.garlic.com/~lynn/2005j.html#34 IBM Plugs Big Iron to the College Crowd http://www.garlic.com/~lynn/2005j.html#35 IBM Plugs Big Iron to the College Crowd http://www.garlic.com/~lynn/2005p.html#18 address space http://www.garlic.com/~lynn/2005s.html#26 IEH/IEB/... names? http://www.garlic.com/~lynn/2006b.html#28 Multiple address spaces http://www.garlic.com/~lynn/2006f.html#20 Old PCs--environmental hazard http://www.garlic.com/~lynn/2006j.html#27 virtual memory http://www.garlic.com/~lynn/2006j.html#31 virtual memory http://www.garlic.com/~lynn/2006n.html#16 On the 370/165 and the 360/85 http://www.garlic.com/~lynn/2006n.html#27 sorting was: The System/360 Model 20 Wasn't As Bad As All That http://www.garlic.com/~lynn/2006t.html#16 Is the teaching of non-reentrant HLASM coding practices ever defensible? http://www.garlic.com/~lynn/2007g.html#57 IBM to the PCM market(the sky is falling!!!the sky is falling!!) http://www.garlic.com/~lynn/2007k.html#28 IBM 360 Model 20 Questions http://www.garlic.com/~lynn/2007l.html#71 IBM 360 Model 20 Questions misc. posts mentioning 16-way smp support http://www.garlic.com/~lynn/95.html#5 Who started RISC? (was: 64 bit Linux?) http://www.garlic.com/~lynn/95.html#6 801 http://www.garlic.com/~lynn/95.html#11 801 & power/pc http://www.garlic.com/~lynn/97.html#5 360/44 (was Re: IBM 1130 (was Re: IBM 7090--used for business or http://www.garlic.com/~lynn/98.html#40 Comparison Cluster vs SMP? http://www.garlic.com/~lynn/2002i.html#82 HONE http://www.garlic.com/~lynn/2002p.html#58 AMP vs SMP http://www.garlic.com/~lynn/2003.html#4 vax6k.openecs.org rebirth http://www.garlic.com/~lynn/2003.html#5 vax6k.openecs.org rebirth http://www.garlic.com/~lynn/2004f.html#26 command line switches [Re: [REALLY OT!] Overuse of symbolic http://www.garlic.com/~lynn/2004m.html#53 4GHz is the glass ceiling? http://www.garlic.com/~lynn/2005k.html#45 Performance and Capacity Planning http://www.garlic.com/~lynn/2005m.html#48 Code density and performance? http://www.garlic.com/~lynn/2005p.html#39 What ever happened to Tandem and NonStop OS ? http://www.garlic.com/~lynn/2005r.html#46 Numa-Q Information http://www.garlic.com/~lynn/2006c.html#40 IBM 610 workstation computer http://www.garlic.com/~lynn/2006l.html#30 One or two CPUs - the pros & cons http://www.garlic.com/~lynn/2006n.html#37 History: How did Forth get its stacks? http://www.garlic.com/~lynn/2006r.html#22 Was FORTRAN buggy? http://www.garlic.com/~lynn/2006t.html#7 32 or even 64 registers for x86-64? http://www.garlic.com/~lynn/2006t.html#9 32 or even 64 registers for x86-64? http://www.garlic.com/~lynn/2007g.html#17 The Perfect Computer - 36 bits? http://www.garlic.com/~lynn/2007g.html#44 1960s: IBM mgmt mistrust of SLT for ICs? http://www.garlic.com/~lynn/2007g.html#57 IBM to the PCM market(the sky is falling!!!the sky is falling!!) http://www.garlic.com/~lynn/2007l.html#26 Is Parallel Programming Just Too Hard? http://www.garlic.com/~lynn/2007m.html#13 Is Parallel Programming Just Too Hard? ---------------------------------------------------------------------- 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
