| 摘要 |
PURPOSE:To externally connect a memory having large capacity by adding a means for modifying address data outputted from a microprocessor so as to expand an address space which can be specified by the address data. CONSTITUTION:a microprocessor 100 sets an address data in an offset address register 120 by a writing signal 110. The set offset address data is inputted to an address modifying circuit 140 through an output line. Continuous and physical addresses are assigned to a memory block 150 and these addresses are selected in every bit or every byte by an address on a memory address bus 130. Address operation is executed so as to increase the number of effective addresses on the basis of said offset address data and the address data from the micro-processor and the operated result is supplied to the memory block 150 as an memory address, so that a memory having large capacity can be externally connected. |
