US3219807A - Error checking apparatus for data processing system - Google Patents

Claims (1)

1. 6. IN A DATA PROCESSING SYSTEM WHEREIN DATA ITEMS ARE TO BE STORED AND TO BE VERIFIED FOR CORRECTNESS UPON EXTRACTION FROM STORAGE, EACH DATA ITEM COMPRISING A FIRST PLURALITY OF DATA ENTITIES AND EACH DATA ENTITY COMPRISING A SECOND PLURALITY OF BINARY DIGITS, AND WHEREIN THE BINARY DIGITS OF EACH DATA ENTITY ARE TRANSMITTED IN PARALLEL AND THE DATA ENTITIES OF EACH DATA ITEM ARE TRANSMITTED SEQUENTIALLY, THE COMBINATION COMPRISING: FIRST REGISTER MEANS FOR TEMPORARILY STORING A DATA ITEM, SECOND REGISTER MEANS FOR TEMPORARILY STORING A DATA ENTITY, A FIRST GENERATOR RESPONSIVE TO THE CONFIGURATION OF EACH SET OF LIKE-ORDER BINARY DIGITS IN A DATA ITEM STORED IN SAID FIRST REGISTER MEANS FOR GENERATING CORRESPONDING CHECKING BINARY DIGITS, SAID CHECKING BINARY DIGITS PROVIDED BY SAID FIRST GENERATOR COMPRISING A SEPARATE DATA ENTITY, MEANS FOR TRANSMITTING SAID CHECKING BINARY DIGITS PROVIDED BY SAID FIRST GENERATOR IN PARALLEL TO SAID SECOND REGISTER MEANS FOR STORAGE THEREIN, MEANS FOR SEQUENTIALLY TRANSFERRING SELECTED ONES OF THE DATA ENTITIES IN SAID FIRST REGISTER MEANS TO SAID SECOND REGISTER MEANS,A FIRST AND SECOND GROUPS OF OUTPUT FLIP-FLOPS, SAID FIRST GROUP BEING ASSOCIATED WITH SAID FIRST REGISTER MEANS AND SAID SECOND GROUP BEING ASSOCIATED WITH SAID SECOND REGISTER MEANS, SECOND AND THIRD GENERATORS CONNECTED TO SAID FIRST AND SAID SECOND REGISTER MEANS RESPECTIVELY AND RESPONSIVE TO THE CONFIGURATIONS OF THE BINARY DIGITS OF EACH DATA ENTITY THEREIN FOR GENERATING CORRESPONDING CHECKING BINARY DIGITS, MEANS FOR SEQUENTIALLY TRANSMITTING TO SAID FIRST AND SAID SECOND GROUPS OF OUTPUT FLIP-FLOPS AND STORING THEREIN THE DATA ENTITIES IN SAID FIRST AND SAID SECOND REGISTER MEANS RESPECTIVELY IN PARALLEL WITH THEIR CORRESPONDING CHECKING BINARY DIGITS PROVIDED BY SAID SECOND AND SAID THIRD GENERATORS, A STORAGE MEDIUM LATERALLY DIVIDED INTO FIRST AND SECOND GROUPS OF LONGITUDINAL STORAGE CHANNELS, MEANS FOR RECORDING IN SAID FIRST AND SAID SECOND GROUPS OF CHANNELS OF SAID STORAGE MEDIUM THE DATA ENTITIES AND THEIR CORRESPONDING CHECKING BINARY DIGITS IN SAID FIRST AND SAID SECOND GROUPS OF OUTPUT FLIP-FLOPS RESPECTIVELY, AND ERROR CHECKING MEANS RESPONSIVE TO THE CHECKING BINARY DIGITS PROVIDED BY SAID FIRST, SECOND AND THIRD GENERATORS FOR DETECTING AN ERROR IN THE DATA ITEM.