Patent ID: 7996667

Claim:
A system with at least two basic input-output system (BIOS) memories comprising: a chip unit comprising a control pin and M chip output pins; a control unit comprising a changer, wherein the changer comprises a changer enable pin, M changer input pins, and N changer output pins, the changer enable pin of the control unit is connected to the control pin of the chip unit, the M changer input pins are respectively connected to the M chip output pins; a preset unit comprising a preset unit input pin and a preset unit output pin, wherein the preset unit out pin is connected to the control pin of the chip unit; and N BIOS memories respectively connected to the N changer output pins, wherein the chip unit is configured to start the changer, the changer is configured to start one of the N BIOS memories according to voltages of the N output pins of the control unit, the preset unit output pin is connected to one of the BIOS memories, the preset unit is configured to start the BIOS memory connected to the preset unit output pin, wherein each of N and M is an integer greater than one, the changer is configured to start one of the N BIOS memories according to voltages of the M chip output pins.