Instruction sequence control
Abstract
Abstract APPARATUS FOR RECOGNIZING THE OCCURRENCE OF A PARTICULAR INSTRUCTION IN A STREAM OF INSTRUCTIONS AND THEN MODIFYING THAT STREAM OF INSTRUCTIONS IS DISCLOSED. A FETCH REGISTER FOR RECEIVING INSTRUCTIONS FROM A MAIN MEMORY IS PROVIDED. A PREFETCH SEQUENCE CONTROL REGISTER CONTAINING THE ADDRESS OF A PARTICULAR INSTRUCTION, AS WELL AS THE ADDRESS OF THE NEXT INSTRUCTION TO BE FETCHED IS ALSO PROVIDED. A COMPARISON IS CONTINUOUSLY MADE BETWEEN THE INSTRUCTION ADDRESS IN THE FETCH REGISTER AND IN THE PREFETCH SEQUENCE CONTROL REGISTER. UPON NOTING EQUALITY BETWEEN THOSE TWO, THE SECOND ADDRESS FROM THE PREFETCH SEQUENCE CONTROL REGISTER IS TRANSFERRED TO THE FETCH REGISTER AND THE INSTRUCTION EXTRACTED FROM MEMORY. MEANS ARE ALSO PROVIDED FOR INHIBITING THIS OPERATION AND PROVIDING AN ADDRESS FROM A RELATED REGISTER TO THE FETCH REGISTER UPON THE OCCURRENCE OF AN EQUALITY BETWEEN THE ADDRESS IN THE FETCH SEQUENCE CONTROL REGISTER AND STILL ANOTHER RELATED REGISTER.
Inventors
- 👤 Edward H Sussenguth
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |