INTER-STORAGE DEVICE DATA TRANSFER SYSTEM

PURPOSE:To shorten a processing time, by dividing a MOVE instruction into two, a start up instruction and a termination instruction, and detecting the start and the completion of data transfer. CONSTITUTION:An information processor is constituted of a central processing unit 1, a main memory control part 2, a main memory device 3 that is a first memory device, and an expanded storage device 4 that is a second memory device. The main storage device 3 is connected to the central processing unit 1 through the main memory control part 2, and performs the transfer of data. Also, the expanded memory device 4 is connected to the device 3 through the main memory control part 2, and performs the transfer of the data, and also, is connected to the central processing unit 1 with a control bus. At this time, the device 4 is divided into two parts: an expanded memory control part 4A which controls the data transfer, and an expanded memory part 4B which stores the data. In such a way, the start up instruction executes only the start up of the data, and after the execution of the start up instruction, other instructions can be executed by the central processing unit 1. Also, the termination instruction performs the completion of the test of the data transfer, etc.