Electrical data handling apparatus including selective substitution of addressable input-output devices

Claim 1

A DATA HANDLING SYSTEM COMPRISING A PLURALITY OF INPUT/OUTPUT DEVICES EACH ADDRESSABLE BY A SEPARATE ADDRESS CODE, A MEMORY INCLUDING MEANS FOR STORING ORDERS WHICH ARE DIRECTED TO SAID INPUT/OUTPUT DEVICES BY MEANS OF SAID ADDRESS CODES, SAID MEMORY FURTHER INCLUDING A PLURALITY OF CELLS EACH CORRESPONDING TO A SELECTIVELY PREDETERMINED ONE OF SAID INPUT/OUTPUT DEVICES, MEANS FOR STORING A SELECTED ADDRESS CODE IN EACH OF SAID CELLS, FIRST AND SECOND REGISTERS, MEANS FOR TRANSFERRING AN ORDER CHOSEN FOR EXECUTION FROM SAID MEMORY TO SAID FIRST REGISTER, MEANS FOR TRANSFERRING SAID SELECTED ADDRESS CODES STORED IN ALL OF SAID CELLS TO SAID SECOND REGISTER, MEANS RESPONSIVE TO THE ADDRESS CODE OF THE ORDER STORED IN SAID FIRST REGISTER TO EXTRACT ONE OF SAID SELECTED ADDRESS CODES IN SAID SECOND REGISTER, MEANS FOR SUBSTITUTING SAID EXTRACTED SELECTED ADDRESS CODE FOR THE ORDER ADDRESS CODE STORED IN SAID FIRST REGISTER, AND MEANS FOR ADDRESS SAID INPUT/OUTPUT DEVICES WITH SAID SUBSTITUTED ADDRESS CODE FOR THE EXECUTION OF SAID ORDER BY ONE OF SAID DEVICES CORRESPONDING TO SAID LAST-RECITED CODE.