Interesting computers thread

Relevant
http://nepp.nasa.gov/workshops/etw2013/talks/Wed_June12_2013/1140_LaBel_%20AMD%20Processor%20Radiation%20Test%20Results.pdf

>>55802000
For reference, some radiation hardened chips can withstand 1-4mrad.
The Trinity APU, off the shelf consumer chip, withstands 17mrad before it has any failures, and after that point it continues to function normally with a simple reboot.

GloFo's 32nm PD-SOI process produces chipps a full magnitude more radiation resistant than specialized rad hardened chips.

>>55802118
AND HOW MUCH DOES THE ONE IN OP WITHSTAND YOU FUCKING SHIT

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>>55801951
>implying we all will not die from cancer

>>55802298
Probably just 1mrad. Its really nothing special, and its based on pretty dated IBM hardware.

Nice tard post btw.

>>55802118
While looking up error correction I remember reading somewhere that an unprotected system with no error correction will produce upwards of 30% errors on all processing as soon as the computer leaves the atmosphere. Your typical desktop computer would be completely unusable in the vacuum of space as it would crash due to corrupt memory before it even managed to boot.

all silicon chips enjoy a large innate resistance to radiation and electromagnetic interference. there's nothing particularly useful or groundbreaking here.

>>55802356
thx I caps locked it as good as I can

I figured, shit they send into space is fucking gabage
>800mhz chips eveywhere

give me a million dollarrs I'll put a fucking i3 in space and have the most powerful satellite up there

>>55802370
>all silicon chips enjoy a large innate resistance to radiation

A few hundred rads will shut down any unshielded chip fabbed on bulk.

>>55802398
>put ziplock bag over my chip
>protected from all elements

ez

>>55802397
Most processors used in space things tend to be pretty goddamn old. Low power, weak, but at the very least they've had ample time for reliability testing, and all their bugs to be fleshed out and documented. Can't have unknown hardware faults influencing software on mission critical systems.

>>55802426
Good luck with that.

>>55802397
>I'll put a fucking i3 in space and have the most powerful satellite up there
why the fuck would you need an i3 for basic physics, data collection and instrument control? all "real" computational work is done planet-side in the first place

>>55802397
Enjoy shit reliability, even in LEO.

>>55801951
All computers are interesting.

>>55801951
Did they run out of solder? Why are all parts kept on with hot glue?

>>55803149
The whole board is coated in resin for additional resilience, this is standard practice for military and space equipment. It's easier for them to replace the whole board instead of bothering with repairs anyway.

>>55803244
It looks like a load of jizz.

>>55801951
The way they coated this in resin triggers me.

>>55803519
>being this autistic

>>55801951
more threads like this please
was reading this week that the apollo 11 computer
input unit isn't the computer

>>55801951
>RAD750
The RAD750 system has a price that is comparable to the RAD6000 which is US$200,000 per board

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>>55801951
Why is everything on that board coated in cum?

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>>55803772
It's still pretty damn small, though.

>>55805334
so many logic cards. Just to think all that shit can be done on a single chip these days at a much faster rate.

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>>55805381
I don't even think the AGC was that good at the time to begin with.

Can't shit on discrete cards though, it feels so... technological.

>>55805465
True, but at the same time multiple discrete cards results in increased power consumption and weight, both of which are commodities on any spacecraft.

The way the AGC was built though I think they built it like that so that between missions they could configure the flight software for that mission by simply swapping in and out pre-built cards.

Nowadays though with the processing and storage options available to us, it would be easier and faster to make it a single board computer with 2-4GB SLC flash storage, 1GB of ram (depending on flight ops needs), and dual-redundant rad-hardened flight computer.

The huge and rather heavy block of computing hardware used for the AGCs could be replaced with a Raspberry Pi's worth of compute hardware, and it would save a huge amount of resources.

>>55805641
Don't forget about serviceability too.

>>55802397
space computers don't need much processing power, they do most processing on the ground

>>55805381
Obviously you skipped over the bit about it being radiation-insensitive. Component density is a prime exposure for radiation.

>>55808120
True, but then again there were more fuckups due to PEBCAK than there was due to cosmic ray strikes, or in 13's case, their oxygen going boom and fucking up everything.

And for modern flight computers, they're usually double or triple redundant and are constantly checking each other for errors. IIRC the Space Shuttle was triple redundant with 2 backups on top of that on the flight computers.

>>55801951
Looks like it's covered in semen

>>55801951
That is not RAD750

RAD750 is a radiation hardened PowerPC 750 processor

what you have pictured is not a processor

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Not pictured: MIPS flavor.
A pandora's box of odd hardware and rage inducing software choices.

>>55808291
>PPC 750
Can I run OS9 on it?

>>55808319
Not without a proper Gestalt ID

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>dat PowerPC logo

the fuckin nostalgia

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>>55802975
Well you might want to play Chrysis on high settings with it too, or maybe mine for bitcoins. I mean taking pictures of moon rocks, and trying to prove Jesus isn't the son of God and personal savior of mankind is only so useful in the real world, and all these darwinists at NASA know that. So might as well make the thing useful for something, right?

>>55804371
Why not? Cum is great for heat transfer.

>>55808301
I've always wanted one of the R5K versions of these, maybe as an aesthetic SSHv1-v2 bridge system so I can check my email on my primary server from shitboxes without opening it up to v1 vulnerabilities.

>>55808233
>than there was due to cosmic ray strikes
It's not really a matter of "it could happen" it's that it will happen. There's a reason there are more PEBCAK-related fuckups than hardware fuckups, after all.

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>>55801951
Now this is what I call technology.