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Mes rendez-vous
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Akku Asus k53f www.akku-fabrik.com
Dell XPS L502X Battery www.all-laptopbattery.com
Dell Inspiron N7010 Battery www.all-laptopbattery.com
Acer Aspire 5101 Battery www.all-laptopbattery.com
Asus a73 Battery www.all-laptopbattery.com
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Les échographies
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Akku Acer Aspire 4552 www.akku-fabrik.com
HP Compaq NX8240 Battery www.all-laptopbattery.com
Lenovo G555A Battery www.all-laptopbattery.com
Laptop akku Sony vgp-bpl2c www.akku-fabrik.com
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Les achats
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Acer Aspire 8942g Battery www.all-laptopbattery.com
HP ProBook 4515s Battery www.all-laptopbattery.com
Batterie Lenovo G555 www.magasinbatterie.com
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Batterie Dell Latitude E5520m www.magasinbatterie.com
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La chambre de bébé
Akku für Samsung q520 www.pcakku.com

Divers
HP B6N04EA laptop battery www.dearbattery.co.uk


Acer Aspire 2930g Battery www.all-laptopbattery.com

Certainly, if Toshiba forgot to ask for this one back, I could see it quickly replacing the HP Pavilion dm1 as my backup and travel PC and my Nexus 7 as my go-to tablet. With my Android Moto G and a Windows 8.1 Encore, I’d be covered for all eventualities. The Alliance for Wireless Power has announced that Dell has joined the group, and also outlined a plan to revise its technology so it is capable of delivering 50w of power.That the two nuggets of news were announced in the same canned statement is notable, because the alliance lauds Dell as the “first major PC original equipment manufacturer (OEM) to join a wireless power standards organization.”That statement also says the Alliance has announced “... a secondary, higher-powered initiative focusing on wirelessly charging electronic products from 20 to 50 watts, like Ultrabooks, laptops, and mid-powered appliances.”That the devices in Dell's portfolio most likely to benefit from wireless charging are its laptop computers which, like most of their ilk, need rather more wattage than the 20 to which the Alliance's “Rezence” near-field magnetic resonance technology has previously aspired, mean ““Dell’s addition to the Alliance signifies the importance of defining a wireless power standard that spans … higher power levels thus expanding the range of electronics beyond smartphones.”The announcement does not offer any information on when 50w Rezence can be expected, or whether other laptop-makers are now more inclined to consider membership of the Alliance. Vulture South imagines Dell's presence on the organisation's membership roster will make it more attractive to other OEMs.


Archaeologic We all know about the ZX80, the ZX81, the ZX Spectrum and its successors, and the QL. But these weren’t the only microcomputers Sinclair Research worked on during its brief life between 1979, when it emerged as the renamed Science of Cambridge, and 1986, the year its brand and products were bought by Amstrad and it was shut down for good.Clive Sinclair had prompted the development of the ZX80, which was largely an evolution of Science of Cambridge’s MK14 microprocessor learning kit, a board computer based on the National Semiconductor SC/MP 2 chip. The ZX80 was a essentially a MK14 based on a Z80A processor and with a fitted cassette port and TV modulator. The ZX81 was an logical upgrade of the ZX80.At the time of the ZX81’s release, the Spectrum was in development as the ZX82 and was again an upgraded version of its predecessor, this time with colour graphics and an updated Basic. Even then, though, there were many ideas being bandied about as to what kind of micros the ZX83 and the inevitable ZX84 might be.


The ZX83 would eventually become the QL, but not before the codename had been attributed to a number of possible machines that Sinclair managers and engineers thought they might bring to market in 1983. One was a mobile micro, very likely inspired by the March 1981 launch of the Osborne 1 portable computer, and this notion of a portable computer for business users would tax various Sinclair engineers for the rest of the company’s life. It was briefly attached to the ZX84 codename.Clive Sinclair’s desire to build a mobile computer that, crucially, could operate as the user’s sole machine and not as an adjunct to a desktop would eventually be realised through a product named Pandora, and development work was proceeding on the device when Alan Sugar formally took over in April 1986.Sugar killed it, but in doing so allowed Sinclair engineers soon employed elsewhere to move the project on without being hindered by the baggage that working at Sinclair had involved: specifically the need to incorporate the company’s flat-tube screen technology. The result was the LCD-based Cambridge Computing Z88, a much better product than Pandora ever came close to becoming. The Z88 was “one of [Clive Sinclair’s] best products”, says Perran Newman, who led the Pandora team after working on the C5 electric vehicle.



Sinclair’s failure to build a working mobile micro ensured Sir Clive was never credited with developing Britain’s first laptop computer. That honour goes to Thorn EMI, which built and released the battery-powered Liberator in the year between the summers of 1984 and 1985, while Sinclair Research was completing the QL and, later, developing the Spectrum 128.Sinclair also missed out on producing the first British games console, as we’d understand the term today, when a project dubbed the Low-Cost Colour Computer - aka LC3 - fizzled out when its two key developers got working on other, more pressing projects.The QL itself might have been the means by which Sinclair released the first British 16-bit home computer, if the business machine’s development team had been given extra time to adapt their hardware to become a platform for future Spectrum-branded machines. They tried, but under the tight development deadline they were working to, they failed and the idea was dropped.


The QL was never the great success Sinclair hoped it might be, but it might have been had more time been granted to its development and features considered for a later, second-generation model, codenamed Tyche. These included a 3.5-inch floppy drive in place of the Microdrives, a full 68000 processor instead of the QL’s cut-down 68008 and a mouse-driven graphical user interface. Tyche would have provided all of those had it got further than the drawing board. Its GUI would have been Digital Research’s Graphical Environment Manager, better known as Gem.Gem was ported to the 68000 for Atari’s ST during the last quarter of 1984 and the gaming power of the ST but more particularly of its 68000-based rival, Commodore’s Amiga, prompted two Sinclair engineers to propose an Sinclair alternative, codenamed Loki. Like Pandora and Tyche, it never survived the Amstrad takeover. Ditto projects like Janus and Proteus, or even left-field options, such as Dylan, conceived as a low-cost PC clone that might succeed where the QL had failed.


Martin Brennan joined Sinclair Research in 1982 specifically to investigate and develop new artificial intelligence algorithms, but he soon became wrapped up in broader efforts centred on bringing Sinclair’s promised Microdrives to market. Brennan eventually engineered the ZX Interface 1 through which the Microdrives would connect to the Spectrum.But Sinclair Research wasn’t the kind of place where engineers were told to work on specific projects to the exclusion of all else. The company hired young, brainy people and gave them space for their natural creativity to flourish.One of Martin’s ideas: a really cheap machine that could bring punters in through its gaming capabilities but provide scope for expansion so they might build it up into a full computer in due course. Designed to be inexpensive, it would perhaps replace the monochrome ZX81 and certainly protect the Spectrum from Far Eastern rivals feared to be on a mission to undercut Britain’s market leader.



There was a template for such an expandable system: the Mattel Intellivision. Launched in America in 1979 but not made available in the UK until 1982, the Intellivision had been developed as a games console to rival Atari’s massively popular VCS 2600. Unlike the Atari box, the Intellivision was created with the idea that its console hub could, with the addition of a bionic keyboard add-on, become a true personal computer.The Intellivision Keyboard Component, as the add-on was called, provided extra memory, a cassette interface and a 6502 processor. Essentially it was a computer in its own right, using the console as a TV-output peripheral. It proved hard to engineer, and was late to market.LC3 would avoid these problems by starting out as a computer. The notion was to fit it with a Z80 processor, a little bit of memory and enough ROM for the operating system, which would load games in off ROM cartridges. It was envisaged as a small black box with a ROM slot in the front, says Stephen Berry, the Sinclair software engineer Martin Brennan got working on the LC3’s OS and Basic interpreter while he worked up a prototype motherboard. It’s not hard to imagine the visual inspiration: the ZX Microdrive itself.


Not that LC3 ever got as far as an industrial design. Breadboards were built with TTL to provide Berry with hardware on which to run his code, but the project doesn’t appear to have progressed any further than that. Berry says he was shifted to more pressing matters: wrangling the documentation for the QL, for one, a task that took him many months of full days and weekends of work to complete.There was no time for the LC3 until all that was done, and by the time the QL manuals had been completed, around June or July of 1984, the LC3’s time had passed.“I wasn’t at Sinclair for the LC3 but was for Loki, and LC3 only ever got mentioned in passing,” recalled Quondam Sinclair programmer and occasional Register journalist Rupert Goodwins in 2002. “I remember seeing a ULA design for it, but it was only pulled out of a cupboard for nostalgia reasons.”More than 30 years on from those days, details of the proposed specification, beyond the basic notion of implementing very little memory in order to keep the price as low as possible, remain vague. Stephen does recall some of the work he did on the software. The operating system, he says, was built out of a “little kernel” capable of multi-tasking. He may not have completed support for windowing - really just segmenting the screen into arbitrary independent areas - but he certainly built in the hooks for the mechanism behind such a system to be added later. “The design had to overcome the twin restrictions of low processor power and limited amounts of memory,” he says.

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