Multi-BIOS circuit and switching method between multiple BIOS chips

摘要

The present invention relates to a multi-BIOS circuit and a BIOS switching method accomplished through the circuit. The multi-BIOS circuit comprises at least two BIOS chips, a SPI Select chip is disposed between the BIOS chips and a Southbridge chip, the BIOS chips are connected to the SPI Select chip pins, and the SPI Select chip is connected to the Southbridge chip pins. The present invention can significantly enhance the safety of computers, and increases the stability as well as the convenience in use and operation.

主权项

1. A multi-BIOS circuit comprising at least two BIOS chips, wherein a SPI Select chip is disposed between the BIOS chips and a Southbridge chip, and comprises at least one register and at least one FUNSEL pin, the BIOS chips are connected to the SPI Select chip pins, and the SPI Select chip is connected to the Southbridge chip pins, wherein the SPI Select chip operates in both an automatic mode and a manual mode, and the operation mode is selected by means of setting the at least one FUNSEL pin or the at least one register, and from which BIOS chip of the at least two BIOS chips a system is started is determined by pulling up or pulling down the at least one FUNSEL pin through hardware.