| 摘要 |
PURPOSE:To set an address with the number of the bit more than the number of the bit of an address bus by making coincident the second address data outputted to a data bus and the second address data stored in respective pieces of data input/output equipment and selecting one of plural pieces of the data input/output equipment. CONSTITUTION:By the first address data of the first prescribed bit number equal to the bit number of the address bus outputted to an address bus 3 and the second address data of the second prescribed bit number of the bit number or below of the data bus outputted to a data bus 2, the addresses of respective pieces 4a-4n of the data input/output equipment are set. By the address, the selection of the data input/output equipment is selected. Consequently, the number of the address is not limited by the bit number of the address bus 2. Namely, only for the second prescribed bit number of the second address data outputted to the data bus 2, the number of the address can be increased more than the conventional example. |
