Program control element

Claim 1

IN A DATA PROCESSING MACHINE OPERABLE IN A SEQUENCE OF INSTRUCTION CYCLES IN ACCORDANCE WITH A PROGRAM OF INSTRUCTIONS WITH EACH INSTRUCTION CYCLE COMPRISING AN INSTRUCTION TIME DURING WHICH AN INSTRUCTION READ OUT OF MEMORY IS DECODED AND ADDRESS MODIFICATION PERFORMED, AND AN EXECUTION TIME DURING WHICH THE OPERATION SPECIFIED BY THE INSTRUCTION IS EXECUATED, MEANS FOR MODIFYING AN INSTRUCTION BY ADDING THERETO MORE THEN ONE VALUE DURING THE INSTRUCTION TIME OF A SINGLE IONSTRUCTION CYCLE COMPRISING A PLURALITY OF INTERNAL STORAGE REGISTERS, MEANS FOR STORING NUMBERS IN SAID INTERNAL STORAGE REGISTERS, MEANS FOR STORING AN INSTRUCTION, SAID INSTRUCTION INCLUDING A FIRST PORTION INDICATING THE OPERATION TO BE EXECUTED, A SECOND PORTION CONTROLLING THE USE OF A FIRST INTERNAL STORAGE REGISTER, A THIRD PORTION CONTROLLING THE USE OF A SECOND INTERNAL STORAGE REGISTER AND A FOURTH PORTION INDICATING A MEMORY ADDRESS, AND MEANS RESPONSIVE TO SAID SECOND AND THIRD PORTIONS FOR ADDING THE NUMBERS STORED IN SAID FIRST AND SECOND REGISTERS TO SAID FOURTH PORTION IN A INDEX OPERATION DURING THE INSTRUCTION TIME OF ONE INSTRUCTION CYCLE OF SAID MACHINE FOR MODIFYING SAID FOURTH PORTION SO THAT A MODIFIED ADDRESS PORTION IS AVAILABLE TO SPECIFY A MEMORY LOCATION BEFORE THE START OF THE EXECUTION TIME OF SAID ONE INSTRUCTION CYCLE.