Computer system including system bus and method of device connection by system bus

摘要

According to the present invention, a computer supporting the increase in the number of pluggable cards on the auxiliary I / O bus by using driver / receiver modules and direction control logic instead of using a more complex and more expensive bus for the bus bridge. A system is provided. The number of pluggable cards on the I / O bus is limited by the electrical load of each card and the operating frequency on the bus. Reducing the bus frequency provides longer signal propagation time. The longer signal propagation time supports extension of the bus by driver / receiver modules and logic circuitry that controls the direction in which these driver / receiver modules drive the bus signals. It also allows the driver / receiver modules to change the hardware configuration of the system by attaching and removing I / O cards, without having to stop the data processing operation for the entire computer.