Computer storage contents monitoring - comparing words derived from assembler code and data to determine if stored data set has varied

摘要

The monitoring method for the storage contents of a computer enables determination of whether a stored data set has varied, and hence whether the computer is working correctly. When the source program is assembled the corresp. commands in the form of machine code in serial data are processed into a test work, added to data values and compared during operation of the computer with newly generated test words. The method operates without parity bits. A r.o.m can be connected to the computer through address and data buses. A test word for the stored data pattern is calculated. A cyclic, shortened Hamming code is used having a predetermined Hamming distance according to the applied generator polynomial.