Abstract: A computer system comprising a first computer coupled to a primary PCI bus via a first PCI bus switch and a second computer coupled to the primary PCI bus via a second PCI bus switch. A monitor system is coupled to both the first and second computers as well as the first and second PCI bus switches. In the event of a malfunction in the first computer, the monitor system decouples the first computer from the primary PCI bus, by opening the first PCI bus switch and coupling the second computer to the primary PCI bus by closing the second PCI bus switch.