| 摘要 |
PURPOSE:To shorten a memory access overhead time, by converting an address to a real memory address from a virtual memory address, until the address from a processing device is inputted after a memory device has received an access request. CONSTITUTION:A logical address is set to a logical address register 12 by an instruction M0 and a signal CLK1, and at the same time, a memory access request FF3 is set, and an access request is transferred 4 to a memory device. Subsequently, the logical address is inputted to an address converting device 6, and as a result, a real address is outputted. This real address is stored in a real address register 7 by an instruction M1 and the clock signal CLK1. The memory device which has received the access request signal 4 outputs an address request signal 8 when this request has been received. In this way, contents of the register 7 are outputted 10 through an AND gate 9, and the address is transferred to the memory device. |
