High speed read/modify/write memory system and method

Abstract From the Canadian patent

Abstract of the Disclosure, The subject invention is a an improved memory system and method for a data processing system. The method involves the overwriting of a first data word in a memory by a second data word, wherein each addressable location in the memory holds a data element with N data words. The method comprises reading the data element which includes the first data word from the memory into a first cache register simultaneously writing the second data word to a second cache register, and then writing into the main memory the second data word along with all of the words of the data element in the first cache register save the first word.