Patent ID: 7644261

Claim:
A reset device for a computer system, the reset device comprising: a hardware-reset signal generating circuit for outputting a hardware-reset signal to reset the computer system; a first switch; and a second switch having a first contact electrically connected to the hardware-reset signal generating circuit, a second contact electrically connected to a power supply source and also electrically connected to a central processing unit, and a third contact electrically connected to ground via the first switch, wherein the third contact can be selectively electrically connected to the first contact to enable the hardware-reset signal generating circuit to output the hardware-reset signal when the first switch is turned on to reset the computer system, or the second contact to output a software-reset signal to the central processing unit when the first switch is turned on, to activate a counter of the central processing unit to count a duration the central processing unit accepts the software-reset signal, when a counted time is less than or equal to a preset time and the computer system is not hanging, the computer system resets, when the counted time is greater than the preset time and the computer system is not hanging, the computer system resumes default values.