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Old 10-14-2017, 07:14 PM   #151
jedidia
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I wonder what it is?
We're running a JVM, which all by itself already makes that amount of memory problematic.

And then we need to be able to run some limited image analysis, which means we could find ourselves in need of temporarily keeping a high-res image (up to 32MP, though more commonly 24) in memory. Only few devices actually need this, but it's never a safe bet that a customer won't request it in a few months, so we just see to it that we have enough legspace.

Last edited by jedidia; 10-14-2017 at 07:19 PM.
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Old 10-14-2017, 08:32 PM   #152
Zatnikitelman
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And for me, I was planning to use one to stream SDR radio from a receiver. Not sure though if the bottleneck was RAM or CPU.
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Old 12-06-2017, 12:08 PM   #153
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Not a Raspberry Pi, but I'm still amazed how small these devices get.

Is this one of the smallest?

https://www.mouser.co.uk/new/beagleb...ontent=7361664

N.
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Old 12-06-2017, 12:22 PM   #154
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Originally Posted by Notebook View Post
 Not a Raspberry Pi, but I'm still amazed how small these devices get.

Is this one of the smallest?

https://www.mouser.co.uk/new/beagleb...ontent=7361664

N.
Not sure, 21x21 mm seems to be still about twice as large as the one a coworker has in a custom 3d printed case... its of the size of a small USB dongle, but has no ARM Cortex processor or 512 MB RAM...
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Old 12-06-2017, 02:15 PM   #155
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What device is that?
Anything useful at that size is still surprising to me!

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Old 12-06-2017, 02:21 PM   #156
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Originally Posted by Notebook View Post
 What device is that?
Anything useful at that size is still surprising to me!

N.
Well, not sure what kind of Chinese stuff that was. I can ask him tomorrow.

But see also there:

https://learn.adafruit.com/introducing-trinket
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Old 12-06-2017, 02:40 PM   #157
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Trinket, that's remarkable!

Speaking of chips:
http://www.esa.int/Our_Activities/Sp...space_missions

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Last edited by Notebook; 12-06-2017 at 02:59 PM.
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Old 12-06-2017, 03:03 PM   #158
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Managed to ask him right now, he was still around in the building this late, Arietta G25 is his, another one with a more powerful chip:

https://www.acmesystems.it/catalog_arietta
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Old 12-06-2017, 03:18 PM   #159
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Quite the collection of very small boards having a lot of versatility.

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Old 12-06-2017, 03:49 PM   #160
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Quote:
Originally Posted by Notebook View Post
 Trinket, that's remarkable!

Speaking of chips:
http://www.esa.int/Our_Activities/Sp...space_missions

N.
SPARCV8 architecture? I develop on SPARCs here as paid work. The design is something I call "well meant, but badly done".

Quote:
That was the idea, anyway. The drawback is that upon interactions with the system the registers need to be flushed to the stack, necessitating a long sequence of writes to memory of data that is often mostly garbage. Register windows was a bad idea that was caused by simulation studies that considered only programs in isolation, as opposed to multitasking workloads, and by considering compilers with poor optimization. It also caused considerable problems in implementing high-end Sparc processors such as the SuperSparc, although more recent implementations have dealt effectively with the obstacles. Register windows is now part of the compatibility legacy and not easily removed from the architecture.
http://ieng9.ucsd.edu/~cs30x/sparcstack.html

Seriously, the only good reason for having SPARC architecture in ESA is that they had been fairly fast once upon a time and that Dassault CATIA also needed SPARCs...
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Old 12-07-2017, 01:16 AM   #161
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Holy crap! How far off from a credit card size computer I wonder. Anyone remember SELMA from Time Trax?

Quote:
Originally Posted by Notebook View Post
 Not a Raspberry Pi, but I'm still amazed how small these devices get.

Is this one of the smallest?

https://www.mouser.co.uk/new/beagleb...ontent=7361664

N.
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Old 12-07-2017, 03:36 AM   #162
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Originally Posted by PhantomCruiser View Post
 Holy crap! How far off from a credit card size computer I wonder. Anyone remember SELMA from Time Trax?
The largest Raspberry Pis are credit card sized in length and width, and the only reason they're significantly thicker is that convenient and standard I/O ports have a certain minimum size. We're getting to the point where the lower limit on the size of computers is more a matter of convenience in interacting with them physically than by the minimum size needed to achieve a given level of performance.
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Old 12-07-2017, 07:38 AM   #163
jedidia
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Holy crap! How far off from a credit card size computer I wonder. Anyone remember SELMA from Time Trax?
We're well below that in two dimensions.
Getting the thickness down has mostly to do with plugs. standard USB- and especially ethernet ports tend to be bulky, if you can do without those things and don't mind soldering on your IOs instead of conveniently plugging them on a pin you can have your very much sub-credit-card size computer right now.
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Old 12-07-2017, 08:31 AM   #164
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Hmm, if you don't use plugs and transfer data over wireless, plus charge the thing on the pad thingy, there aren't any connections needed. All commands are by voice like Alexa, Siri, Google Home and Cortana (and whatever else...)



Screw that Oxford comma! Viva la resistance!
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Old 12-07-2017, 09:06 AM   #165
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All commands are by voice like Alexa, Siri, Google Home and Cortana (and whatever else...)
The processing overhead of such an interface is quite significant. You can make a computer in that size with those capabilities, but there's not that much demand for it. Unless you could fit the power source in the same space, but unless we go ahead with wide-area wireless power transmission and sterilize half our population in the process, I can't quite see that happening...
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