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David Pogue reviews the $100 laptop. The
XO-1 is an
inexpensive laptop computer intended to be distributed to children in developing
countries around the world.The rugged, low-power computer contains flash memory
instead of a hard drive and uses the Linux operating system. Mobile ad-hoc
networking is used to allow many machines Internet access from one connection.
Hardware specifications:
* CPU: 433 MHz AMD Geode LX-700 at 0.8 Watts, with integrated graphics controller
* 1200×900 7.5" diagonal LCD (200 dpi) that uses 0.1 to 1.0 Watts depending on mode. The two modes are:
o Reflective (backlight off) monochrome mode for low-power use in sunlight. This mode provides very sharp images for high-quality text.
o Backlit color mode, with an effective resolution that is asymmetrically reduced in complicated ways. See below for details.
* 256 MB of Dual (DDR266) 133 MHz DRAM
* 1024 KB (1 MB) flash ROM with open-source Open Firmware
* 1024 MB of SLC NAND flash memory
* Internal SD card slot
* Wireless networking using an “Extended Range” 802.11b/g Marvell 8388 wireless chip, chosen due to its ability to autonomously forward packets in the mesh even if the CPU is powered off. The chip is run at a low bitrate (2 Mbit/s) to minimize power consumption. It supports WPA. An ARM processor is included.
* Dual adjustable antennas for diversity reception.
* Water-resistant membrane keyboard using a fairly conventional (QWERTY in the US International localization) layout.
* Dual five-key cursor-control pads; four directional keys plus Enter
* Touchpad for mouse control and handwriting input
* Built-in color camera, to the right of the display, VGA resolution (640×480)
* Built-in stereo speakers
* Built-in microphone
* Audio based on the AC97 codec, with jacks for external stereo speakers and microphones, Line-out, and Mic-in
* 3 external USB 2.0 ports.
* Power sources:
o DC input, ±10–25 V
o 5-cell rechargeable NiMH battery pack, 3000 mAh minimum 3050 mAh typical 80% usable, charge at 0…45°C
o External manual power options include a pull-string generator designed by Potenco
Hardware specifications:
* CPU: 433 MHz AMD Geode LX-700 at 0.8 Watts, with integrated graphics controller
* 1200×900 7.5" diagonal LCD (200 dpi) that uses 0.1 to 1.0 Watts depending on mode. The two modes are:
o Reflective (backlight off) monochrome mode for low-power use in sunlight. This mode provides very sharp images for high-quality text.
o Backlit color mode, with an effective resolution that is asymmetrically reduced in complicated ways. See below for details.
* 256 MB of Dual (DDR266) 133 MHz DRAM
* 1024 KB (1 MB) flash ROM with open-source Open Firmware
* 1024 MB of SLC NAND flash memory
* Internal SD card slot
* Wireless networking using an “Extended Range” 802.11b/g Marvell 8388 wireless chip, chosen due to its ability to autonomously forward packets in the mesh even if the CPU is powered off. The chip is run at a low bitrate (2 Mbit/s) to minimize power consumption. It supports WPA. An ARM processor is included.
* Dual adjustable antennas for diversity reception.
* Water-resistant membrane keyboard using a fairly conventional (QWERTY in the US International localization) layout.
* Dual five-key cursor-control pads; four directional keys plus Enter
* Touchpad for mouse control and handwriting input
* Built-in color camera, to the right of the display, VGA resolution (640×480)
* Built-in stereo speakers
* Built-in microphone
* Audio based on the AC97 codec, with jacks for external stereo speakers and microphones, Line-out, and Mic-in
* 3 external USB 2.0 ports.
* Power sources:
o DC input, ±10–25 V
o 5-cell rechargeable NiMH battery pack, 3000 mAh minimum 3050 mAh typical 80% usable, charge at 0…45°C
o External manual power options include a pull-string generator designed by Potenco
