Electronic data processor

Claim 1

IN A STORED-PROGRAM DIGITAL COMPUTER, THE COMBINATION COMPRISING: AN INSTRUCTION SEQUENCING MEANS FOR EFFECTING THE EXECUTION OF SINGLE-ADDRESS AND ONE-PLUS-ONE ADDRESS INSTRUCTIONS IN PROPER SEQUENCE, EACH ONE-PLUS ONE ADDRESS ADDRESS INSTRUCTION INCLUDING A DISTINCTIVE DIGITAL SIGNAL EFFECTIVE TO CAUSE SAID INSTRUCTION SEQUENCING SECTION TO SWITCH FROM A FIRST MODE OF OPERATION, THE COMPLETE SEQUENCING CYCLE OF WHICH INCLUDES READING A SINGLE-ADDRESS INSTRUCTION AND EXECUTING IT, TO A SECOND MODE OF OPERATION, THE COMPLETE INSTRUCTION SEQUENCING CYCLE OF WHICH INCLUDES READING A ONEPLUS-ONE ADDRESS INSTRUCTION, SEARCHING FOR AN OPERAND, EXECUTING IT, AND READING THE NEXT INSTRUCTION FROM A MEMORY LOCATION SPECIFIED BY IT; MEANS FOR SELECTIVELY INHIBITING THE EXECUTION OF EACH ONE-PLUS-ONE ADDRESS INSTRUCTION WHEREBY THE INSTRUCTION SEQUENCING FOR EACH ONE-PLUS-ONE ADDRESS INSTRUCTION IS SUSPENDED DURING A SEARCH FOR AN OPERAND UNTIL THE INHIBITING EFFECT OF SAID MEANS IS REMOVED; MANUAL SWITCHING MEANS FOR SELECTIVELY REMOVING THE INHIBITING EFFECT OF SAID FIRST MENTIONED MEANS WHEREBY ALL SINGLE-ADDRESS INSTRUCTIONS IN SEQUENCE ARE EXECUTED AUTOMATICALLY AND EACH ONE-PLUS-ONE ADDRESS INSTRUCTION IS NOT EXECUTED UNTIL SAID MANUAL SWITCHING MEANS IS ACTUATED FOR THE PURPOSE OF REMOVING THE INHIBITING EFFECT OF SAID FIRST MENTIONED MEANS; A REGISTER FOR STORING A GROUP OF DIGITAL SIGNALS REPRESENTATIVE OF AN OPERATION TO BE PERFORMED, AND THE LOCATION OF AN OPERAND IF ONE IS REQUIRED, OF A GIVEN INSTRUCTION WHILE IT IS BEING EXECUTED; MEANS FOR SELECTIVELY PREVENTING THE CONTENTS OF SAID REGISTER FROM BEING ALTERED WHEREBY THE OPERATION OF AN INSTRUCTION IN SAID REGISTER MAY BE REPEATEDLY EXECUTED; AND MEANS FOR SELECTIVELY FORCING SAID INSTRUCTION SEQUENCING MEANS TO SWITCH TO SAID SECOND MODE OF OPERATION FOR EACH SINGLE-ADDRESS INSTRUCTION THEREBY FORCING A SEARCH FOR AN OPERAND FOR EACH SINGLE-ADDRESS INSTRUCTION AND SUSPENDING FURTHER INSTRUCTION SEQUENCING UNTIL SAID INHIBITING EFFECT OF SAID INHIBITING MEANS IS SELECTIVELY REMOVED BY SAID MANUAL SWITCHING MEANS.