First | Previous | Next | Last
|
IBM 610 workstation computer 3375
her!) Air Force aircrew members still go through the chamber flight in the Aerospace Physiology section of academics during flight training and every 2...
IBM 610 workstation computer 3376
IIRC the absolute ceiling of a DC3 is about 20,000 feet, but you would probably need oxygen at that albreastude. Unpressurised pbuttenger flights would normally be kept below 10,000 feet*. People have climbed...
IBM 610 workstation computer 3377
Hey, I had one of those :) The remote system (SCADA - PLC communicating via a spread...
IBM 610 workstation computer 3378
Surprisingly, in some applications, it works just ducky. The *input* to the PLC is integer - 12 or 16 bit...
IBM 610 workstation computer 3379
Most PLC calculations are hard and nasty - add these two numbers, multiply these two, divide. Rarely are you adding up a long...
IBM 610 workstation computer 3380
Oh but it's so *useful*. The mindset of PLC programming is far different is many ways from a regular computer, not to mention inevitably graphic driven though you can still do Allen-Bradley stuff via...
IBM 610 workstation computer 3381
I believe it's useful otherwise the bit gods wouldn't have implemented it. My sister just asked me for ideas for her son. He has a project buttigned where he's supposed to "shadow...
IBM 610 workstation computer 3382
This kind of abuse can be heard (or felt) at the substations and sometimes at the generating station as well. That momentum from delta 1200 amps has to go somewhere. The energy companies...
IBM 610 workstation computer 3383
Oh yeah. But it's 'only' 277 volts. I suspect the idiots who came up with this idea were more send in electric traction than building systems. On electric RRs...
IBM 610 workstation computer 3384
I dunno. I still can't find a use for 1-2 of what a typical Modicon has. Then again, about the best use for most of Modicon's...
IBM 610 workstation computer 3385
We've been through this before. If you want to use bankers rounding on cents you need to handle 1-10000th of a dollar. This is "what the book...
IBM 610 workstation computer 3386
Well, technically no computer is a "decimal" machine since all eventually get down to binary to do the actual work...
IBM 610 workstation computer 3387
Still, it used binary-coded decimal for memory addressing, which arguably made it more of a decimal machine than one...
IBM 610 workstation computer 3388
there was no symbol for 0-2-8 in ebcdic (punch holes listed in order from top to bottom of column; 12-11-0-1-2-3-4-5-6-7-8-9). 2540 reader would read punch column combinations that represented standard hex (0-2-8 was read...
IBM 610 workstation computer 3389
David Dyer-Bennet In addition, the A and B bits were used in the addressing scheme. The address field was three decimal...
IBM 610 workstation computer 3390
hanchicken4 Well, technically no computer is a "decimal" machine since all eventually get down to binary to do the...
IBM 610 workstation computer 3391
RJ No, nothing like that, but there is no need to guess. Read the paper. Google, as usual, is your friend, but to save the bother of searching, The paper's...
IBM 610 workstation computer 3392
Have you tried to read the whole paper? Most of the audience started out with similar unfamiliarity. OK. The von Neumann...
IBM 610 workstation computer 3393
This is a difficult topic to teach. The serialisation that is implicit in the "von Neumann" model is so intertwined with...
IBM 610 workstation computer 3394
Morten Reistad It's not as easy as it sounds. In computer usage, the "what" and "how" get blurred together. No matter what approach is used, the final instructions a human gives a computer must have...
IBM 610 workstation computer 3395
David Scheidt Unfortunately, in recent years the cheap extra speed and storage has resulted in (IMHO) considerable bloat, not increased performance to the end user. I have a modern fast PC at...
IBM 610 workstation computer 3396
Well, I know it isn't really what you mean, but what the heck... :-) They not only can be faster...
IBM 610 workstation computer 3397
this is so much scheduler ... this is fastpath pathlength optimization and mis-match in processing speeds...
IBM 610 workstation computer 3398
People I know who have access to supercomputers or is doing research on supercomputer technology tell me that plenty of the grunt work is still done in...
IBM 610 workstation computer 3399
Brian Boutel Yes, but it wouldn't come up. Thanks for the detailed explanations. First, I don't agree that the...
IBM 610 workstation computer 3400
KR Williams Whether software or pure hardware I do not care. The buses are now the speed bottleneck. Most instructions take place in a single clock cycle. Reads and writes to main...
IBM 610 workstation computer 3401
Ok, then I stand by my buttertion that main memory (particularly memory virtualized-paged with an MMU) is no more than a...
IBM 610 workstation computer 3402
KR Williams snip Now we can have a sensible debate. The lack of fast memory was the reason virtual storage systems were invented. Each virtual storage block has a pointer is a...
IBM 610 workstation computer 3403
there is what i call the dup-no-dup issue ... with multi-level "cache" architectures...
IBM 610 workstation computer 3404
Snooping is a completely different kettle. Heisenburg's Principle applies here. Even on machines built in simpler times, the snooper had to be very careful...
IBM 610 workstation computer 3405
lots of cache implementations have significant (direct) cross-cache chatter about what cache lines they have (cache coherency protocols). multi-level L1, L2...
IBM 610 workstation computer 3406
On 21 Feb 06 10:20:29 -0800 in alt.folklore.computers, "Charlie Gibbs" Bad programmers can write spaghetti code in...
IBM 610 workstation computer 3407
It would preclude running a x86; the smallest physican instance I know of a x86 processor is just the machine I described below; the Via Eden C3 at around...
IBM 610 workstation computer 3408
I do what I can not to get them wet. They are mounted on the...
IBM 610 workstation computer 3409
The thing that really gets to the electronics is the presence of three things : * Exposed, metallic surface (like a pc) * Corrosive agent...
IBM 610 workstation computer 3410
No CPU in a multi-CPU system can wait. Consider the case where the "owning...
IBM 610 workstation computer 3411
It is normal for locks to have timeouts which trigger some sort of recovery. Beyond reporting the fault and its location the recovery is "implementation dependent". Everything from ignoring the lock...
IBM 610 workstation computer 3412
one of the issues may be that some state involves syncronous updating of multiple memory...
IBM 610 workstation computer 3413
ref: so the os-360 smp kernels had a single "spin-lock" around the whole kernel ... i.e. the first thing...
IBM 610 workstation computer 3414
there is two types of software support ... one is actually hardware cache coherency and the other is smp processing coherency...
IBM 610 workstation computer 3415
If I understand what you're saying..I think this is where JMF-TW's macros were used; and I cannot recall what we...
IBM 610 workstation computer 3416
one of the things done with macros for the vm370 kernel ... was that all activity inside the kernel was buttociated a data structure called a vmblok ... and all processing was accounted for...
IBM 610 workstation computer 3417
background batch was software scheduling of workload. LCS was memory hardware. They are totally independent constructs. A typical 360-50 might have 256kbytes of 2mic, 2byte storage. A typical 360-65 might have 512kbytes...
IBM 610 workstation computer 3418
OK. But this scheduling was site specific, was it not? No two site, probably no two systems, had exactly the same schedules. Thus the software was tweaked for each installation...
IBM 610 workstation computer 3419
it isn't that memory technology has lagged. there are certain physical constant issues that existing paradigms are constrained by. you may have to significantly change the paradigm to get around...
IBM 610 workstation computer 3420
i don't think it is necessarily gender limited. there may be actually be two separate issues ... one is...
IBM 610 workstation computer 3421
Knowing how to think this way may not be gender related. But I'll guarantee you that training someone to...
IBM 610 workstation computer 3422
that was something akin to the original cp67 10 level scheduler (some of which may have even been inherited from ctss). the cpu overhead...
IBM 610 workstation computer 3423
the issue on the 370-195 in bldg. 28 was that unless you had special priority ... the...
IBM 610 workstation computer 3424
Anne & Lynn Wheeler On the 195 On day 001 submit the Pasc job with data...
IBM 610 workstation computer 3425
the 370-195 in bldg. 28 was setup as a service for lots of organizations. pasc's 370-145 was setup just...
IBM 610 workstation computer 3426
PASC owns the 145 ... they've paid for the machine and it otherwise sits idle most nights and weekends. the 370-195 doesn't have any idle...
IBM 610 workstation computer 3427
recent posts in the thread note that VM had been doing something similar for years ... using memory-to-memory moves simulating various kinds of processor-to-processor I-O transfers between virtual...
IBM 610 workstation computer 3428
And do you know how many times my guys had been told to "Trust our hardware...
IBM 610 workstation computer 3429
I don't believe that this is pure hardware. The software has to be able to at least get-set...
IBM 610 workstation computer 3430
Why? One shouldn't have to stop the whole system, just to pay attention to a CPU that may, or may not...
IBM 610 workstation computer 3431
I see a wide chasm in terminology and understanding. Symetric Multi-Processing is ONLY the facility that allows you to continue to add processors to linearly scale computing capacity...