DATA PROCESSING SYSTEM

A data processing system comprises a main memory for receiving an input access virtual address, data, and a write instruction, converting the access virtual address into a real address, storing the data at the real address in accordance with the write instruction, and generating a response upon writing of the data; an execution section for selectively and sequentially executing a series of microinstructions in accordance with an input wait signal, generating a write instruction and an access virtual address upon execution of a write microinstruction, and outputting the write instruction, the access virtual address, and the data to the main memory; and a controller for generating a wait signal in accordance with the access virtual address and the write instruction from the execution section, and the response from the main memory, and outputting the wait signal to the execution section.