2728 posts • joined 23 Nov 2007
Real time on Pi
No, it's the OS.
Ordinary Linux or Windows or iOS or OSX can't even reliably do 2.4kHz sampling to read 1124 bps RDS data, or 38KHz OOK modulation without jumping through hoops in a Device Driver, directly in software with a GPIO pin. An 8bit Arduino or PIC can do it easily.
The official support for Pi is a customised Debian flavour of Linux. You need a keyboard, 4G SD card, HDMI screen (composite is too awkwardly low resolution) and USB2go plugged 5V PSU (the USB2go connector is just power, no data). It can't be bricked as the OS boots from SD card.
So to use the GPIO on Raspberry Pi you need to figure how to either boot a "Real Time" version of Linux (which isn't very real time), or better is some other non-Linux OS.
The Multitasking model in Linux can't assure that a user task is run when you want it, no matter how fast the CPU unless a new kernel patched in Device Driver is added.
Re: I really hope...
I'd love a 3D printer for Brass, Steel etc.
Re: Symbian pre-re-closing from 2010 is still around
If it's going to be recycled as a lean RTOS (with optionally a sensible new GUI for things that need one) you don't need to be able to "build" anything "Belle" compatible. In fact you want to avoid like plague ANYTHING using existing Nokia GUIs over last 10 years. You only want the OS
As to what should be a layer for graphical / User I/O applications I don't know. I've tried building QT based applications for Window / Linux and found Java cross platform GUI libraries better. Not that I think that's a good idea. despite that Android is essentially Linux + a flavour of Java (Davik vs JVM)
Re: Move on and let it die
iOS and Android are what they are, bloated macro kernel OS based on UNIX/Linux concepts. iOS & Android developers are not going to scrape the core of the OS and re-write it from scratch. That though is the only way to get an efficient, secure, low power, reliable and low footprint OS.
Symbian was developed from a OS especially designed from ground up for a single user running multiple small applications in tiny memory on battery powered cpu.
UNIX was designed for mains powered Mini-computers and multiple users. Linux was designed as a functional clone for the 386 CPU with disk storage. It's only because a mobile phone is more powerful and more storage than a 2001 Laptop that iOS or Android is practical at all.
Symbian OS developers are going to want to work on ARM embedded systems, not iOS and Android phones.
Symbian *was* open source for a while. How they get the genie back in the bottle? An embedded controller or other application using a Raspberry Pi needs none of GUI junk that Nokia built on top of Symbian. If you DON'T have screen on the Pi, then VXworks, QNX, or Symbian may make more sense than Llinux which needs a hacked kernel to be "real time". Set-boxes, TVs, WiFi points and Routers can cheerfully use vanilla Linux as there are no "Real Time" constraints or "deterministic at compile time" requirements.
Re: someone must have invented the DVR?
Digital video goes back to early 1970s or late 1960s.
The reason it wasn't in the home was cost of disc storage and cost of video DAC/ADC. Decent codecs help dramatically reduce the storage cost. But TIVO can't claim ANY patents on video codecs or video storage on HDD.
By mid 1980s some PABX used audio codecs and HDD for voice mail. I worked on HW & SW of these and they incorporated most DVR functions apart from EPG scheduling, audio only rather than video.
VHS machines eventually had "EPG" scheduling via Teletext data.
Goes back a long long way.. It's only an invention in a sense. The idea is too broad. Only novel and un-obvious implementations should get patents.
Digital HDD vs Analogue tape only improves the user interface.
Even Archos is cheaper than that.
No-name players 1/4 price.
Either you are going to have a phone for music or a cheap one (or both). It's obviously for Apple fans with too much spare money.
I understand perfectly that TBP doesn't store the copies themselves and is using encryption and routers etc.
But at the end of the day they are the wrong peolple to cheer, they are not doing a single iota of good nor advancing any cause. They are egotistical parasitical scum that get far too much publicity. Their "information" to enable people to download do live on real servers somewhere. The "Cloud" is purely a marketing concept, Routing, load sharing, virtual machines etc practically pre-date the internet and certainly pre-date websites.
I'm baffled as to why the smart people here would cheer on these idiots.
Just marketing for Hosted Services on real servers somewhere. It's no different at all to having servers of their own at a number of different data centres.
Whether or not their site(s) run on a virtual server or not isn't relevant either.
Virtual Servers and so called Clouds use real servers in real buildings in real countries.
I'm 100% opposed to pursuing downloaders or blocking people's internet to ANY server (doomed to failure) or cutting of people from the Internet.
But these people are no latter day Robin Hoods. They are at best parasites and at worst criminals. Just because the Media Industry is nuts and charges too much and doesn't recompense the artists and production crew enough doesn't give them the right to distribute.
I admire people that create, I admire people that pay to support that. I despise parasites and criminals dressing up their actions as somehow beneficial.
Bond, Batman etc
maybe people are hoping for a Reboot of Windows XP or a sensible version of Ubuntu.
I refuse to believe a tablet-centric Windows designed by Marketing Dept that played with a Zune is creating an "Osborne effect*", or "iPhone" anticipation on Windows 7 sales.
Combination of Corporates waiting for Windows 9 or 10 or better "linux" and ordinary consumers "taking the Tablets", because really most don't need a real PC.
(* Though Osborne had a near fatal drop in sales when the "new model" was announced, the reality is that we are talking late 1983, two years after the IBM PC and more than a year after the initially very successful ACT Sirius1/Victor 9000. The product and CP/M was obsolete)
Re: The ARM chips might make that a little tricky
No, far predates Sheeva
Re: It's crazy......
But Shirley, they are not made in USA, but China? But I suppose UK <--> China return trip is more expensive
Re: And the 2012 Pointless Award goes to...
I used to think that Chrome was totally pointless. But actually for many people it does give them what they want. idiot proof browser (and web based email and documents) without any OS to look after. Sort of Apple iOS for iPad taken to an extreme and physical qwerty.
Mines the one with a Nokia N9210 in the pocket.
( It would only be a problem if this was the only choice. I'll stick too Windows XP and Debian for all my devices with a screen and real QWERTY keyboard )
Re: Debian please
Much easier to install Debian on this than on a dead badger, which allegedly has been attempted. Not sure if it worked or was a headless server...
Re: ARM Cortex A15
a TV HD anyway....
Computing has had higher resolution displays than so called 1920 x 1080 "full HD" for over 15 years.
Re: The ARM chips might make that a little tricky
I've been running Linux on ARM since 2005. It's been available much longer.
Where do you think the Pi eaters got Linux? It's available for ARM. Actually isn't Chrome OS really just Linux + a browser and everything else locked? Like Android is essentially a Linux variant + Davik (Google's flavour of JVM for Google's flavour of Java) + Browser.
My LG TV isn't intel either and runs a version of Linux.
About 1000 ARM cores ship per x86 Core I think and a lot of them run some sort of Linux. Some run VXworks or QNX or Windows CE (apart from ARM based phones running iOS, Android/Linux, Brew, QNX, Windows Phone (based on CE till v8), Symbian, Badu etc).
There is a big big world out there beyond the x86 and Windows. Don't be surprised if Mac Book or Mac Air drops x86 for ARM as soon as it makes more profit and little difference to User. They want OS X to be more like iOS anyway)
Apple in a quandry
Their products are grossly overpriced.
To maximize the Damages they want to suggest they lost X sales at Y profit per sale. But the public may be revolted by a Profit margin x2 to x4 other vendors (or whatever it is).
Did they ever consider
That maybe the content has become very poor?
Linux may be fine
But Ubuntu has swallowed a whole bottle of LSD.
Seizing defeat from the Jaws of Victory.
Re: Is it just us?
It's going to be MUCH worse in Ireland...
Also the Modem or phone "jams" cable broadband or Cable TV in the same room. No filter or solution other than moving the phone / modem about 10m away from anywhere the cable, connections, setbox or modem is.
I surprised Virgin hasn't been complaining more.
Really the whole "Digital Dividend" idea is stupid, The frequencies 900MHz to 2600MHz allocated for Mobile are poorly used and more than enough for Mobile.
Really future DTT services need the spectrum and the 800MHz band results in cells too large for good Cellular data capacity. The Digital dividend was based on idea of Digital only replacing Analogue, no HD, no 3D no Ultra HD, no extra channels no pay Channels.
Re: What about areas where 4G rollout will be a long time coming?
LTE isn't anything like as good as Broadband, and most broadband unless Cable or Fibre isn't good enough for even one IPTV channel. What if you have 2 or 3 TVs?
Note that the "headline" speeds are for Zero Interference, perfect signal and only one user connecting. Typically in less than 2% of mast sector area. Add ten users in one place and you may not even be able to do Youtube.
The ONLY "Web" integration I want
Is a decent secure Web Browser as isolated sandboxed separate application.
I have no wish to prostitute my computers on the Web or "Internet".
Also Web != Internet.
Re: four by two? 101.6 by 50.8.
101.6 by 50.8.
That's the un-planed size. So the "real" size is always significantly smaller.
It's a minefield buying wood. Unless it's for the stove.
Re: Inquiring minds...
No-one has ever been able to replicate Tooth reception.
I know not entirely serious, but Myth busters tried too.
I bet the barbed wire fence is long and near the transmitter. I've built "crystal" sets with better diodes than galena or oxide (copper oxide can be quite good) and you need large aerial (loop or long wire + earth) and very sensitive earpiece.
Re: Think of the Children!
You can get audio at the difference frequency between Video and Audio carriers, and harmonics, so 6MHz, 12MHz, 18MHz etc for 625 TV. About 4.x something MHz on 405, long time ago, I don't remember.
The Audio IF strip if on carrier rather than "intercarrier" is 6MHz below video IF usually, so about 33MHz approx for 625 line.
USA used 44MHz Video IF and Europe usually 39MHz approx for 625 line. Earlier 405 sets used various frequencies from about 12MHz to 44MHz. Earliest 405 sets simply tuned one 42MHz approx channel directly with NO IF, later in 1955 the first set boxes sold for Band I only sets to get ITV on Band III
Re: Inquiring minds...
Yes, it's been done and the "electro-sensitive" people would score as well tossing a coin to answer if the transmitter is on or off.
Lucille Ball may have started the fad with her probably fictitious account of receiving radio on fillings. Also tested negative.
It's a pity though that something the size of a pea could seriously damage the craft, depending on what it hits.
No, Nurse, I will not take the Tablets.
Which one is enough dots for A4 documents without scrolling and able to read super/sub script etc without zoom?
Which one can replace printing the datasheets?
We are going backwards ....
First low resolution Laptops and PC monitors that are WS and only TV HD
Now nothing for A4 datasheets etc. OK, the main demand is paper back size. but we need more than one size screen
They don't make notebooks. Wrong price bracket.
Re: Brings back memories
The full height 5.25" 5Mbyte HDD on the Apple II seemed like a lot compared to the Wimpy Apple floppies. Last Apple product I bought. I was too young to spot hype. It did need a separate PSU
Re: I’m worried that I under-specified the hard drive. At half a gig, it's not much
Though larger drives than 500G seem less reliable
The maps is a test
The next one will be seriously reduced in cost and functionality, while sold at same price. This will allow longer battery life.
They will sell just as well and make more profit. For phone calls it will actually be better due to less complexity and longer battery. Win-Win
Intel Inside isn't much help.
Re: What Theory?
It might be nice for describing interaction, but it's no help at all in design or evaluation of a UI.
Elop didn't kill Nokia
They strangled themselves years earlier. Getting involved with Intel was Toxic, but they had probably already wasted too much time, over 3 years.
Spinning disks are not "dead" then if cost and storage is more important than latency. Arrays do reduce the latency issue a bit.
It seems we are nowhere near the limits of increased disk density, though no large jumps in capacity.
Could it be that NAND Fab plant building isn't happening because perhaps it's still a premium price niche market as well as the uncertainty over alternate technologies. I think there may be more than the three mentioned in the article.
All semiconductors run on magic smoke. Because when it escapes they don't work. All that is left is a bit of glass like crystal and some wires.
Losev was tragic loss
Marconi's assistant told Marconi about the glowing crystal, but like many successful entrepreneurs, he had a single obsession, to make money from Radio. As it wasn't a good radio detector, he wasn't interested.
I knew Losev had published about LED. I didn't realise he had an LED patent though. He also described a "Transistor" (not called that then) but unfortunately most of what he wrote on that was destroyed in the War.
Re: Lollipop Anyone?
Except if you made the Sinclair kit, you were a genius if you could fit it in the black case
Not having root?
Anyone falling for this Social Engineering (not a flaw) has already done three stupid actions before typing the password into any "Password to install" prompt.
Clicking on link
little consistency across ARM-compatible systems beyond the basic processor instruction ...
I have a idea there are three main families of ARM instructions.
Also both endians
Various extensions (Neon? something for Java ?)
But "x86" you need really 3 or 4 kernels
The Magpie aka Curiosity is easily distracted by bling.
Indeed that was what I meant!
Well obviously if it still works with some nozzels failed, then x9 more likely nozzle failure is not a problem.
Actually the flight may be a very expensive failure for the Satellite owner as the next stage burn was unsafe to do. But undoubtedly a step forward vs Shuttle. I may not have worded the original post clearly.
with nine times as many nozzles, it might be nine times more likely to fail. In the early days there was experiments with "many" nozzle engines.
Duh, it's either a clamshell rectangle with screen and keyboard or a box that a screen & keyboard plugs into.
If it is portable it shouldn't be too heavy and the big innovation would be 8 hours + life instead of approximately 3 to 4 we have had for ten years.
The screen and keyboard shouldn't be shiny.
The keyboard should not get jammed with hair and crumbs.
It should be reliable and fast enough (1/10th second response worst case to any action).
It should have all the I/O required and spaced such that something in one aperture doesn't block the neighbour.
Stuff like ultra thin, alloy casing, carbon fibre, funky translucent plastic or what ever is irrelevant unless it is needed for above.
He is clueless.
Might be perfectly true ... But
"Huawei is entirely owned by its employees. No third party - including government institutions - has any ownership interest in Huawei," he said. "Huawei’s success has not been based on favouritism or subsidisation by the Chinese government."
But that doesn't rule out that Huawei does whatever the [Chinese] Government asks. It's certainly interesting to see who has been sold what for how much in Africa and what China gets out of it.
Some non-Chinese companies are no different and even do it for highest bidder.
Re: What's the point?
It's all pointless
A dock or plug makes more sense.
The chargers need plugged in somewhere anyway.
Re: It's all about timing
Actually the problem with Transputer was it needed a different way of programming and thinking. Traditional OS and programming and libraries and existing applications can't be sensibly run on such highly parallel systems.
So not about the timing. Transputer was only ever a niche product in a market that Intel with hugely more resources has struggled with. If the Transputer had been an Intel or US invention, animation Render Farms would be running Transputer based 1000s of cores per chip and 1000s of chips per rack today.
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