US3566366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective execution circuit for program controlled data processors
Assignee: AT&T Inc
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Filing: 1968-10-25
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Granted: 1971-02-23
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Expires: 1988-10-25
Abstract
Abstract IN A STORED PROGRAM COMPUTER EMPLOYING BOTH HALF WORD LENGTH INSTRUCTIONS AND FULL WORK LENGTH INSTRUCTIONS, A CIRCUIT ARRANGEMENT IS DISCLOSED FOR SELECTIVELY OMITTING EXECUTION OF NO-OPERATION HALF WORD LENGTH INSTRUCTIONS. THE SECOND INSTRUCTION OF A PAIR OF HALF WORD LENGTH INSTRUCTIONS IS DECODED DURING EXECUTION OF THE FIRST INSTRUCTION OF THE PAIR AND AN OUTPUT SIGNAL IS GENERATED. WHEN THE SECOND INSTRUCTION IS A NO-OPERATION INSTRUCTION. THE OUTPUT SIGNAL CAUSES THE COMPUTER TO OBTAIN A NEXT INSTRUCTION WORD OR PAIR OF INSTRUCTION WORDS FROM MEMORY WITHOUT EXECUTION OF THE NO-OPERATION INSTRUCTION.
Inventors
- 👤 Thomas M Quinn
- 👤 John E Yates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:09
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/30; G06F9/38; G06F9/3818; G06F9/3822; G06F9/30145; G06F9/30149; G06F9/3802; G06F9/3816
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |