Selective lockout of computer memory

Claim 1

FOR A DIGITAL COMPUTER OF THE INTERNALLY STORED PROGRAM TYPE, THE IMPROVEMENT COMPRISING THE COMBINATION OF: A MEMORY SECTION FOR STORING MANIFESTATIONS INDICATIVE OF MACHINE INSTRUCTION WORDS AND OPERANDS IN A MULTIPLICITY OF ADDRESSABLE MEMORY REGISTERS, SOME OF THE INSTRUCTION WORDS COMPRISING AT LEAST A CODED OPERATION PORTION AND A CODED MEMORY-ADDRESS DESIGNATING PORTION; WRITING CIRCUIT MEANS FOR SELECTIVELY ALTERING THE STORED CONTENTS OF THE MEMORY SECTION; PROGRAM CONTROL MEANS FOR CALLING OUT CERTAIN OF THE INSTRUCTION WORDS FROM THE MEMORY SECTION IN A PREDETERMINED PROGRAM SEQUENCE; FUNCTION REGISTER MEANS COUPLED TO SAID MEMORY SECTION FOR RECEIVING EACH CALLED OUT INSTRUCTION WORD AND FOR HOLDING SAID WORDS AT LEAST AN INSTRUCTION CYCLE; DECODING MEANS COUPLED TO SAID FUNCTION REGISTER FOR TRANSLATING THE CODED OPERATION PORTION OF EACH INSTRUCTION WORD, SAID DECODING MEANS INCLUDING MEANS FOR DEVELOPING A FIRST SIGNAL OUTPUT WHEN THE OPERATION PORTION IS OF A FIRST PREDETERMINED CODE AND A SECOND SIGNAL OUTPUT WHEN THE OPERATION PORTION IS OF A CODE WHICH DESIGNATES ALTERATION OF THE MEMORY CONTENTS; A MEMORY LOCKOUT STORAGE REGISTER FOR STORING MANIFESTATIONS INDICATIVE OF SELECTED MEMORY ADDRESS RANGES IN WHICH ALTERATION OF THE STORED DATA MANIFESTATIONS WILL BE PROHIBITED; MEANS COUPLED TO SAID DECODING MEANS AND RESPONSIVE IN PART TO SAID FIRST SIGNAL FOR ENABLING THE TRANSMISSION OF THE MEMORY-ADDRESS DESIGNATING PORTION OF THE CORRESPONDING INSTRUCTION WORD TO SAID STORAGE REGISTER; MEANS COUPLED TO SAID STORAGE REGISTER AND SAID FUNCTION