An input/output port address selection circuit for a device that couples to a local bus of a computer operates in two modes. In a first mode, the I/O port address is maintained as the last I/O port address saved. In the second mode, the selection circuit changes the I/O port address and saves the change...http://www.google.com.tw/patents/US5561813?utm_source=gb-gplus-share專利 US5561813 - Circuit for resolving I/O port address conflicts
