someone smarter than Dave Cutler
in [Device Drivers]
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From: Pat Farrell on 3 Apr 2010 10:27 Charles Richmond wrote: >> I see no connection between business degrees and the details of how the >> business programs were implemented. That was left to the geeks while the >> business majors became a "Master of The Universe" > > You'd think that, wouldn't you... But business majors are *required* to > take one or two semesters of COBOL programming. And looking at computer > printouts of business reports and such are things that most business > graduates will have to do. I can believe this for some schools last century. Do you know of cases where it is true today? No body looks at greenbar printouts anymore. -- Pat Farrell http://www.pfarrell.com/
From: Gene Wirchenko on 3 Apr 2010 15:24 On Fri, 02 Apr 2010 18:56:27 -0500, Charles Richmond <frizzle(a)tx.rr.com> wrote: >Gene Wirchenko wrote: >> On Thu, 1 Apr 2010 11:35:17 -0700, Mark Crispin <mrc(a)panda.com> wrote: >> >> [snip] >> >>> I still cringe at the memory of an IBM 360/67 running OS/360+HASP; and >>> with Call-OS (shudder!), APL\360, ATS, and CourseWriter as timesharing >>> systems each doing (SHUDDER!!) PSW stealiing. >> ^^^^^^^^^^^^^ >> Please define this term. >PSW == Program Status Word on the IBM 360 and 370. I know that! What is "PSW stealing"? Sincerely, Gene Wirchenko
From: glen herrmannsfeldt on 3 Apr 2010 16:31 In alt.sys.pdp10 Gene Wirchenko <genew(a)ocis.net> wrote: (snip, someone wrote) >>PSW == Program Status Word on the IBM 360 and 370. > I know that! What is "PSW stealing"? I can guess ... similar to the tricks people did with interrupts in MS-DOS, if you want a routine to be run at certain times then substitute a PSW pointing to it for one of the interrupt new PSW locations. Then after your routine does what it needs to do then LPSW for the original, which you should have stored somewhere else. -- glen
From: Mark Crispin on 3 Apr 2010 16:54 On Sat, 3 Apr 2010, glen herrmannsfeldt posted: >> I know that! What is "PSW stealing"? > I can guess ... similar to the tricks people did with interrupts > in MS-DOS, if you want a routine to be run at certain times then > substitute a PSW pointing to it for one of the interrupt new PSW > locations. Then after your routine does what it needs to do > then LPSW for the original, which you should have stored somewhere > else. Close enough, although it doesn't give a complete sense of the horror on OS/360. MS-DOS based Windows did not have FILO task termination requirements. -- Mark -- http://panda.com/mrc Democracy is two wolves and a sheep deciding what to eat for lunch. Liberty is a well-armed sheep contesting the vote.
From: Johnny Billquist on 3 Apr 2010 18:55
Charles Richmond wrote: > Mark Crispin wrote: >> On Thu, 2 Apr 2010, Scott Lurndal posted: >>> FWIW, the school I chose _invented_ the digital computer. It also has >>> a very >>> well respected Vet Med college. >> >> Bell Labs does not have have a Vet Med college. >> >> The digital computer was invented by George R. Stibitz in 1940. >> >> Now, if you went to Dartmouth and were confused by Stibitz's >> affiliation there, then perhaps you are also unaware that Dartmouth >> had PDP-10s. >> > > The digital computer was actually invented by "cave men" who were > counting their fingers (digits). ;-) > > For almost anyone you name as the inventor of the digital computer, > someone can come up with an earlier person who invented the technology. Konrad Zuse. He atleast got that we should be using binary and not decimal atleast around 1936. :-) Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt(a)softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol |