JPS6476348A - Memory checking method - Google Patents

Abstract

PURPOSE:To shorten memory checking time by defining a value obtained from the power value of 2 as the value of an objective address where a processor reads out data. CONSTITUTION:An address check is started at an address 0 and the member of addresses to be checked is defined as 2<n>(n=0,1,2...). A processor 1 reads data out of these addresses and performs the arithmetic operations of said data. while check sum data, CRC check data, etc., are stored in a specific address, e.g., the final address in a memory 2 and then compared with the arithmetic results for check the presence or absence of the fault of the memory 2. Thus all addresses in the memory 2 can be checked since the 2<n> addresses are selected. As a result, the memory checking time is shortened in response to the large memory capacity.