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On laptops, charging devices from the USB port when it is not being powered from AC drains the laptop battery; most laptops have a facility to stop charging if their own battery charge level gets too low. [82] On Dell, HP and Toshiba laptops, sleep-and-charge USB ports are marked with the standard USB symbol with an added lightning bolt or ...
BIOS interrupt calls perform hardware control or I/O functions requested by a program, return system information to the program, or do both. A key element of the purpose of BIOS calls is abstraction - the BIOS calls perform generally defined functions, and the specific details of how those functions are executed on the particular hardware of the system are encapsulated in the BIOS and hidden ...
Blinkenlights on the NSA's FROSTBURG supercomputer from the 1990s Typical LED pattern of a Thinking Machines CM-5. The bits and digits in the earliest mechanical and vacuum tube-based computers were typically large and few, making it easy to see (and often hear) activity.
Nokia 2-mm DC Charging Interface Specification [3] 4.65–9.3 V Nokia DC-096 (0.48×2.1 mm on socket side) Nokia AC-3 charger Nokia 2-mm DC Charging Interface, used in Nokia phones and Bluetooth headphones 2.35 0.70 9.5 A EIAJ-01 0–3.15 V Kobiconn 3218-EX Lumberg 1636 01 Kobiconn 0307-EX (inline)
Computer systems such as laptops often produce large amounts of heat which must be dissipated. This is typically done by activating a fan to blow air over the components that are producing heat; the fan is not simply turned on or off, but is driven at high speed by the embedded controller for a short time and then left running at low speed ...
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Acer Liquid Metal, Dell Flash, Smoke, HP Veer, HTC Desire Z, Huawei Ideos X5 (U8800), NEC Casio Medias N-04C MSM7630 [1] Casio G'zOne Commando, HTC Evo Shift 4G, Merge, Sky VegaXpress IM-A710K APQ8055 [1] Nokia Lumia 900, Bambook Sunflower: MSM8255 [1]
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