Hard power shutdown of a computer by actuating both a keyboard controller independent key and a soft power switch together to bypass the power switch together to bypass the power controller

Abstract

To enable a power to the computer to be shut down in a simple configuration and independently of the status of the computer. The power switch is set at the normal position while the computer is operating. Each of the power, reset, and function signals is thus on the high level (A). When the function key A is pressed in that status, the function signal can be shifted to a low level signal so as to validate only the key A (B). While the power switch is shifted to a pointed position and the key A is not pressed, only the power signal is validated, thus a power-on or power-off command can be issued (C). If the power switch is set at a pointed position and the key A is pressed, then the level of the reset signal becomes low, thereby the reset signal is validated with the key A (D). Consequently, the power to the computer can be shut down forcibly if the power switch is set at a pointed position and the key A is pressed, regardless of the status of the computer operation.