Abstract: A computer system having a hard disk drive including a product key input program for writing a product key of an operating system (OS) program in a CMOS RAM, and a CD-ROM drive including a recovery program for recovering an OS program and application programs to an initial state. Should a defect of the hard disk drive or critical error of the OS program occur, the OS program may need be reinstalled or a recovery program may be run to recover the initial states of the OS program and the application programs. The product key stored in the CMOS RAM will be used during the recovery or re-install process, so that the user does not have to manually input the product key again.

Abstract: A computer system having a computer main body and a monitor displaying a video signal from the computer main body and a control method thereof. The control method includes storing a display information of the video signal displayed on the monitor based on EDID supplied from the monitor in the computer main body; determining whether the display information of an input video signal transmitted from the computer main body to the monitor is suitable for the EDID of the monitor; displaying the input video signal if the display information of the input video signal is suitable for the EDID and supplying an error signal to the computer main body if the display information of the input video signal is not suitable for the EDID; and processing the input video signal according to the display information stored in the computer main body and supplying it to the monitor if the error signal is supplied to the computer main body.

Abstract: A computer system includes a CPU (central processing unit), a main memory, a BIOS ROM (basic input/output system read only memory), a display device and an input device, and using an OS (operating system) program having its product key. The computer system further includes an OS program storage storing the OS program therein, a product key storage storing the product key of the OS program, a product key storage program reading the product key of the OS program stored in the product key storage to be inputted, when a product key of an OS installation program to reinstall the OS program and the product key stored in the product key storage are identical. With this configuration, where an OS program is to be reinstalled due to damage of a hard disk drive or a critical error of the OS program, the stored product key is read out and is automatically inputted into a product key input window, thereby giving a user convenient computer environment.

Abstract: A computer system having a computer main body and a monitor displaying a video signal from the computer main body and a control method thereof. The control method includes storing a display information of the video signal displayed on the monitor based on EDID supplied from the monitor in the computer main body; determining whether the display information of an input video signal transmitted from the computer main body to the monitor is suitable for the EDID of the monitor; displaying the input video signal if the display information of the input video signal is suitable for the EDID and supplying an error signal to the computer main body if the display information of the input video signal is not suitable for the EDID; and processing the input video signal according to the display information stored in the computer main body and supplying it to the monitor if the error signal is supplied to the computer main body.

Abstract: A computer system includes a CPU (central processing unit), a main memory, a BIOS ROM (basic input/output system read only memory), a display device and an input device, and using an OS (operating system) program having its product key. The computer system further includes an OS program storage storing the OS program therein, a product key storage storing the product key of the OS program, a product key storage program reading the product key of the OS program stored in the product key storage to be inputted, when a product key of an OS installation program to reinstall the OS program and the product key stored in the product key storage are identical. With this configuration, where an OS program is to be reinstalled due to damage of a hard disk drive or a critical error of the OS program, the stored product key is read out and is automatically inputted into a product key input window, thereby giving a user convenient computer environment.

Abstract: A device controlling a flash-read-only-memory (flash-ROM) storing a basic input output system (BIOS) of a personal computer including a controller controlled by software generating a first control signal or a second control signal controlling a chip enable signal of the flash-ROM, and a control buffer, having an input port receiving the chip enable signal and an output port connected to a chip enable port of the flash-ROM, outputting the chip enable signal unchanged when the control signal generated by the controller is the first control signal and changing the chip enable signal to be inactive and outputting the changed chip enable signal when the control signal generated by the controller is the second control signal.

Abstract: An updater device for flash read-only memory is provided. The updater device may be constructed using a power input interface that transfers battery from either a battery or an electrical adapter to the updater device. The updater device has a body containing circuitry that controls the operations of the device. Located in the body is an input, or first, port and an output, or second, port for engaging flash read-only memories. A source flash read-only memory is inserted into the input port and the updater is then placed over the target flash read-only memory so that the updater device engages the target flash memory. A button that is located on the body activates the updating process. First the microprocessor reads data from the source flash read-only memory via a first read-only memory interface located in the input port. Then the microprocessor uses a second read-only memory interface in the second port to erase the target read-only memory.