A bus bridge apparatus for performing broadcasted writes to redundant memory subsystems in a network storage controller is disclosed. A FIFO selector 103 receives register configuration value information comprising a register configuration value and address information, and selects a transmission destination to which the register configuration value information is to be sent, from FIFOs 108 and 109 based on the address information and sends the register configuration value information to the selected destination. The first voltage enables the central processing unit, the read only memory, the random access memory and the peripheral circuit to change their operations.