XO 1.75: the next generation of XO
The XO 1.75 is the latest computers from the OLPC Foundation. OLPC France is fortunate to have a preview for a few weeks, a beta of 2 models of this machine. Detailed review of the machine and the changes it brings.
On the form the XO 1.75 is identical to the XO 1.0 and XO 1.5 that succeeded it: it's always the little green computer launched in 2007. It inherits the same hull as his elders and he incorporates the main elements: even dual screen mode (PixelQi), even rubber keyboard, TouchPad even the XO 1.5 and the same ports (3 USB, 1 headphone, 1 microphone and 1 SD slot).
In fact it is in its internal components including the motherboard that the XO is 1.75 revolution. The XO 1.0 had an AMD processor, the XO 1.5 had a VIA processor. They both relied on an x86 architecture that is found on our PC or Mac. The XO 1.75 it is based on a Marvell processor architecture ARM architecture is based on which most of our smartphones and tablets. Advantage of this type of processor: it is cheaper than x86 and they consume much less energy (hence their use on thin clients). Two very important benefits for the XO.
Energy side, even if it is too early to have a benchmark full consumption of 1.75 XO. He promises to eat even less than his elders (for the record that are already among the most efficient machines on the market), it was recently seen such a feeding 1.75 XO directly (without battery) on a solar panel.
A clock power equal, the ARM processor is much more swift than equivalent x86 processor. We have conducted a comparative test of the starting time of 3 machines: 1.75 XO, XO 1.5 and XO 1.0. The XO 1.75 undoubtedly comes first. Speed which is also the execution of various activities and or shutdown.
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Another feature of XO XO 1.75 compared to 1.0, memory storage is provided by the MMC instead of strips welded to the motherboard. The advantage is that its size (4GB to 8GB) can be selected with the order without changing the architecture of the motherboard. The other advantage is that this type of memory is less subject to changes in market prices of flash memory (a very important point as well). On the model B1 we have that memory MMC can also be completed via an internal SD card (plus a external SD card on port).
1.75 Finally, the XO features a new component found in some standard on smartphones today: a 3-axis accelerometer. That is to say, a component that detects the orientation of the machine, but a simple gadget that allows already to consider recreational uses in activities. Here for example a game developed with Etoys.
On the software side, the use of an ARM has a drawback: the binary code generated on an x86 processor is binary compatible with an ARM processor. Fortunately, Sugar, the operating system that the team relies on a XO GNU Linux Fedora. But Fedora was focused not only on x86 but also on ARM processors. Thus, the latest version of Sugar for the XO (11.3.0) based on Fedora 14 is fully functional on the XO 1.75, although some adjustments, being resolved, are still required (driver support specific XO ).
As for the different activities developed for previous versions of the XO, they run successfully for most of the XO 1.75. Indeed, the preferred development language development for Sugar is the language Python is an interpreted language and therefore completely independent of the binary and the type of processor. Only problem arise activity compiled for x86. In our tests this was the case of the activity kiwiX , Oo4kids and RiverHex . Their port to the XO 1.75 will require recompilation or repackaging.
The XO 1.75 is a natural evolution of the XO, it offers a refreshing components while preparing the ground for the future XO 3.0, which will inherit most of its components (including processor). In short, a continuation of the new!































