Push two buttons simultaneously for changing boot ways
Original Publication Date: 2001-Oct-18
Included in the Prior Art Database: 2003-Jun-19
Disclosed is a method to change boot devices with pushing two or more buttons simultaneously in the system like personal computer. In normal case, the boot device is easily to be changed by everyone, but by this method, only the authorized person can do it. This method can also detect button stuck failure. And it is helpful for the server-like system and the system which doesn't have usual user interface: display monitor, keyboard, or mouse, etc. to use this method. ·Our method to change boot devices is as follows; 1. In boot sequence, the system BIOS checks whether the particular set of buttons are pushed or not. 2. If the BIOS recognizes that the particular buttons are pushed, then it requires to release the buttons to the user. 3. If the BIOS detects that the buttons are released, then the system will boot from another boot device. 4. In case the buttons are not released, then the system recognizes that the buttons are failed by stuck or something wrong. In addition, to protect from miss operation, this method also include following design; 1. In normal boot sequence, button operation is not required. 2. The time period when the BIOS checks the particular set of buttons is restricted within predefined value.