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Array Initialization With Address Fault Checking

IP.com Disclosure Number: IPCOM000067352D
Original Publication Date: 1979-Jul-01
Included in the Prior Art Database: 2005-Feb-20

Publishing Venue

IBM

Related People

Authors:
Pertzborn, JJ Schmierer, QC Womeldorff, RA [+details]

Abstract

Random-access storage arrays used in computer systems have a tendency to fail at power-on time. Hence, the ideal time to check the array data locations and address lines is during initialization, i.e., shortly after power-on time. In the past, the checking arrangement included the steps of writing the address of each location into that location and reading it back. The data read back is then compared with the address, and in this manner it is possible to determine the exact location or address line which is failing. In the present arrangement, address fault checking is accomplished by writing a repetitive pattern of data into the storage locations and then reading the data from the storage locations and determining if the sequence of data read back has been interrupted.