JPS6459439A - Main storage device - Google Patents

Abstract

PURPOSE:To shorten a waiting time of read-out operation to improve the performance of the data processing time, by performing the partial write operation only with the read-out operation when the read start is held in a memory start information holding circuit group and the partial write operation to the same bank is executed. CONSTITUTION:A buffer storage part 8 in which data or the like outputted from a selective merging means 7 is stored a buffer control part 9 which controls the buffer storage part 8, and a priority level determining circuit 2 which issues a command or the like of the operation to each control part in accordance with determination based on prescriptions, pertinent start information, etc., in case of contention of start information to the same storage area are provided. An address control part 3 which performs the address control of a storage part 5 and the buffer storage part 8 by the command of the determining circuit is provided, and a holding circuit group 1 is provided with a circuit where data sent from the buffer control part 9 is held. Thus, the start operation to each storage area is efficiently and quickly processed.