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The Zenith MinisPort (styled as minisPORT) is a subnotebook based on an 80C88 CMOS CPU running at two software selectable speeds: 4.77 MHz or 8 MHz. It was released in 1989 by Zenith Data Systems (ZDS). It had 1 (model ZL-1) or 2 MB (model ZL-2) of RAM, ran MS-DOS 3.3 Plus from ROM, had a 640×200 LCD display and CGA and composite monochrome ...
There is a magnet that is located in the top lid above this switch, and when the lid is closed the magnet triggers the reed switch. If the magnet loses strength then the system will not go into suspend or hibernation if the lid is closed. The magnet strength can be checked by running a paper clip along the top edge of the screen.
Machine state is held in RAM and, when placed in sleep mode, the computer cuts power to unneeded subsystems and places the RAM into a minimum power state, just sufficient to retain its data. Because of the large power saving, most laptops automatically enter this mode when the computer is running on batteries and the lid is closed.
Zenith Data Systems unveiled the SupersPort line alongside Zenith's TurbosPort 386 luggable computer on April 19, 1988. [4] Both the SupersPort and TurbosPort were marketed under the company's new Road Warrior umbrella of battery-powered portable computers, a project helmed by Andy Czernek and John Frank, VP of marketing and president of Zenith respectively. [5]
The finger scoop has also been reshaped to avoid breaking the glass screen when the lid is being closed, which is a problem its predecessor suffered. Devindra Hardawar of Engadget said of the 15-inch model, "The Surface Book 2 is exactly what we've wanted from a high-end Microsoft laptop. It's powerful, sturdy and its unique hinge doesn't come ...
On the other hand, a system in sleep mode still consumes power to keep the data in the RAM, and thus cannot last indefinitely, as hibernation can. Detaching power from a system in sleep mode results in data loss, while cutting the power of a system in hibernation has no risk; the hibernated system can resume when and if the power is restored.
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The first contender for true laptop computing was the 16-bit Dulmont Magnum, designed by David Irwin and John Blair of Dulmison, Australia, in 1982 and released in Australia in September 1983 by Dulmont. This battery-powered device included an 80 character × 8 line display in a lid that closed against the keyboard.