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Originally posted by SkipShipman
Here is an interesting thought, considering the reliability of technology does not necessarily increase with speed. NASA uses 486 laptops!
Originally posted by longbow
F-22 procesors are completely upgradeable, so what was true some time ago, must not be true now. The whole CPU unit can be quickly replaced if necessary. The prototype was using only 286, I think. However they are not supercomputers (todays standarts), they are just normal, reliable, slightly modified intel procesors.
[edit on 17-2-2005 by longbow]
Originally posted by RichardPrice
Standard processors are anything but reliable Thats why there are three of them, CIPs (Conditional Instruction Processors). The current production F/A-22s have 600mhz systems in them, as nothing else has yet passed certification.
Originally posted by sminkeypinkey
I remember NASA making a public appeal for the older chip-sets (as the spares aren't made anymore) a while back.
So this begs the question, if more modern processors are unreliable in space, are they having custom lower-tech ones made specifically for them now or do they face a future where they run out of usable stuff?
Originally posted by GrOuNd_ZeRo
The F-22's must run into many gigahertz, they use very powerful computer systems, but they can probably not be compared to a PC's processor.
They probably use different processors for different functions too, I'd ask Off_the_Street and Intel_Girl
Originally posted by otlg27
You guys seems to think you need WAY more CPU power than you really do to fly an airplane
As a software engineer I can tell you this. Running in a pure embedded environment a pair of 486s could fly an F-22. The reason you need so much power in your PC is the pretty pictures and sounds.. For embedded flight control, CPU power isnt' a problem. Hell the shuttle only uses 486s and it flys MUCH faster..