| 摘要 |
PURPOSE:To attain easily and quickly the initialization to an address conversion information memory means by writing the write data after qualifying it with a qualifying means when the address conversion information is written to an address of the address conversion information memory means. CONSTITUTION:The upper one of address data given from a CPU1 is supplied as the address data of a RAM22 via a buffer 27. Then the contents of the corresponding RAM22 are sent to a buffer 25 in the form of the address data. This data is then delivered from the buffer 25 as the address data to a main memory or an I/O, etc. together with the lower one of the address data given from the CPU1 via the buffer 27. A control part 21 writes the qualified data sent from a qualifying part 24 to an address designated by a RAM address counter 23 of the RAM22 as well as to the part 24. |
