IBM System/360 Model 91 Operators Console at the Seattle Living Computers Museum + Labs
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- เผยแพร่เมื่อ 18 ม.ค. 2020
- Beautiful functioning IBM System/360 Model 91 Operators Console at the Seattle Living Computers Museum + Labs. Used by the U.S. strategic command to track satellites and publishes tracking data that allows the prediction of a satellites position and altitude. This one is currently tracking the international space station from the museum.
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The wonderful thing about computers of this era was that after about 3 days you really could read the lights when it was running and know roughly what was going on.
My co-workers at IBM Poughkeepsie who designed the 91 said you needed sunglasses when you pushed the "lamp-test" button.
The lights on this panel are not the real lights. They have been changed to LEDs. The real panel just glowed with incandescent bulbs
The whole System 360 series was a massive and expensive gamble for IBM -- nobody else had tried to create an all-encompassing architecture that could be implemented on small(er) computers as well as large ones. Hence the “360” in the name, representing the full-circle coverage of the concept.
I think this was also the architecture that invented the concept of byte-addressability, which has become ubiquitous nowadays.
That's what all computers ought to look like, with lots of flashing lights and buttons.
Isn't a monitor just a big screen of flashing lights, and the keyboard has lots of buttons. /lh🤣🤣🤣
I toured the facility at NASA/GSFC where the 91 was installed when I was a kid, doing the career day shadowing thing. After high school I worked in that facility for several years, alas after the 91 was long gone. We did still have the very first Amdahl 470/V6, tho
Those are some serious blinking lights!
I worked for IBM for 37 years. I was trained on the 360/91 and supported the one at Princeton University. The cpu had a clock cycle time of 60 nanoseconds and could execute multiple instructions each cycle. The control panel lights were normally a blur.
@@apollomoonlandings the blinkenleds appear to simulate something. I don't believe they are really representative of what is really happening in the computer
@@AmauryJacquothaha the 360 NEVER had LEDs. They were not even invented yet when this machine was produced, hence this is not an actual oanel
@rty1955 This is an actual 360/91 panel. However, it may have been rewired and rigged to respond to simulations run on software from a modern PC. It looks AMAZING!!!
I hope the Living Computer Museum opens back up so I can come and visit it one day to see this in person.
@@AmauryJacquot I think (at least in this case) probably just for show.
Its successor, the 360/195, which added cache memory, basically had the same architectural advances as we saw much later in the Pentium Pro and the Pentium II: cache, an out-of-order floating-point unit, and an advanced division algorithm (although the 91 and 195 used a faster algorithm, even if on slower hardware).
IBM was never able to keep up with CDC and Seymour Cray, though.
the pc boards in the back look modern, Something to make the lights flash perhaps?
I would bet - the light sequences are not realistic, especially the red fault lights, which should be off unless there is an error.
Fun fact: people would prank operators by turning on LAMP TEST, which lit ALL the lights, and pull semi-random bulbs out JUST ENOUGH so they were "off". The operator would see red fault light(s) and a "frozen" panel, an indication that the machine had halted. It would be a heart stopping moment because, if real, it meant your machine was "dead" and might be down for days.
The days when some people could read binary like a newspaper 👏
those of us who ran these beasts got to know what the lights felt like -- normal operation, heavily I/O bound states, or the doom of machine checks. I got to tend one of the 91's at UCLA for a bit. Also spent time with plenty of 360/50s, DEC PDP-10s and SDS Sigma 7 and 9 mainframes. Flashing lights and lots of switches! Another feature of the 91 and family -- intercom jacks in each bay for the engineers to use, as the only way to talk to someone at the other end of the machine was over headsets.
@@artiem5262 right on (46 year IBM mainframe career as programmer/operator)
I worked on Model 91's at UCLA and Lockheed. I got about 5 minutes of training. The first Customer Engineers that maintained the 91 got a year of training. Fortunately, all of the problems were light bulb replacement and iron core memory failures.
Very cool!
How do you cope with a core memory failure?
@@marcwolf60
We had one extra memory cabinets. Pulled the faulty one replaced with the extra. Then we diagnosed and replaced whatever parts that were required in the removed cabinet. Then one day, we had two cabinets fail...
Beautiful computer!
and now we have debug consoles usually in a little window at the corner of a brightly lit monitor
0:57 It's a Cylon! 1:27
Pressing the lamp test button (turned on all lamps so one could see if any were burned out) made quite a display.
Imagine a computer with a clock speed so slow it made sense to use flashing lights to indicate data moving in and out of registers. That's what is was like back then.
This thing ran in the MHZ.... the panels were really used for single step. This simulation is slowed down considerably. In reality it would blur a lot.
That isn’t what the lamps are for. When the computer halts, the lamps show the state of the processor, so an analyst can figure out what is going on by interpreting the lamps. They are useful when things are not working properly.
The pre-70's era was filled with breakthroughs. Back in the day when something new came on a computer, it's something never seen before. A brand new invention. After the mid-70's, anything you can call new, I can point to something from the 60's that did the same thing but more crudely. It's not fair to compare old computers with new. It's like me saying you the teleporter I just made that can teleport you a mile away and you say you don't care because in 50 years we'll be able to teleport to China.
@@tickertape1 Right. Incandescent cooling times are long enough that when running, you just ended up with a bunch of dim lights.
At one time, the UCLA Computer Club owned one of these (it was being discarded by the Health Services Computing Facility), and was arranging to sell it to Universal Studios as a prop. Unfortunately, the Club was unable to warehouse it long enough, and it was scrapped. Members did keep little pieces of it. There were, per Wikipedia, only 15 of these ever built, and UCLA had two of them (another commenter mentions one of them).
Some parallelization in processing was possible on this model. If you were insanely out for speed, and wanted to clear two general registers, you could subtract one from itself, and xor another one from itself, and they would happen simultanously because one was the arithmetic unit and the other was the logical unit. This all meant that sometimes you would need to deal with 'imprecise interrupts', when an interrupt occurred when two different instructions were in progress.
it is fantastic thanks
Looks like something from an Irwin Allen set.....
Actually it was the earlier AN/FSQ-7, also an IBM machine, that turned up in pieces on the sets of loads of SF movies/TV series for years after being decommissioned.
There is a spacecraft control panel on _Lost In Space_ that comes from a Burroughs/Electrodata B205.
Wondering in terms of modern day hardware, which system nowadays would provide similar performance.....would expect some tiny spaced device is sufficient ???
coooooool. Joshua
OMG! They hot the BAT computer!
i love it...😁😉
Looks like some of the equipment I worked on in the military. Just wasn't the IBM 360.
Did you work on any SAGE systems, by any chance?
Was there a System 360 running nearby or were they simulating one for the operator console?
Its probably is real, I have been there. A bunch of years back I picked up an IBM 1401 (circa 1960) with a paper tape device. The price was just to take it away. We got it working. The hardest part was finding paper tape.
@@charlesbaldo Its not. It’s just a panel emulation. do tell me more about the 1401 though!
@@tickertape1
Thanks actually its not even the museum I thought it was. I had it confused with the Boston Computer Museum that closed 20 years ago.
I was a young software developer in 1982, a guy I worked for had a two way radio repair business and some of the techs had a line on a 1401, it had 4k magnetic core and we programmed RPG on it. The deal was we get it out of his business and it was ours. I had the manual, until a few years I gave it to a friend who was a fan of an Icelandic musician that had an album called IBM 1401 users manual
Definately a simulation, the order of some of the lights would never happen on a real system.. and would definitely be more random.. I worked on the model 40 and 65 for 3+ years in a large installation... generally speaking a Red indicator being on caused the system to stop...
@@jcak552 the doom of a “check”
Ultron likes this
Интересно, насколько реальна анимация лампочек.
I wonder how real the animation of the light bulbs is.
Sadly there are no running IBM360's left on the planet.
Hello, Joshua ;)
let's play the game?
"All I see is blond, brunette, redhead."
Ask it the time, 2 days later the answer
There must haw been a truck load of lightulbs changed every month, just one worker for that.
Not a bad job
ITYM "one worker just for that"?
My Dating Computer...
Fake light sequences. Especially the red error indicators.
(I had a 46 year career programming and operating these wonderful machines)