Patent US3560933A successfully refreshed from Google Patents.
US3560933A
Expired / Lapsed
US
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Microprogram control apparatus
Assignee: Honeywell Inc
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Filing: 1968-01-02
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Granted: 1971-02-02
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Expires: 1988-01-02
Abstract
Abstract THE PRESENT INVENTION RELATES TO SUBCOMMAND CONTROL IN AN ELECTRONIC DATA PROCESSING SYSTEM. IN PARTICULAR IT RELATES TO CONTROL SYSTEMS IN WHICH MICROPROGRAM SEQUENCES ARE STORED IN A NONDESTRUCTIVE READOUT MEMORY FROM WHICH THEY ARE SELECTED BY MASTER PROGRAM INSTRUCTIONS AND USED TO DIRECT THE MICRO OPERATIONS IN THE CENTRAL PROCESSOR. IN ACCORDANCE WITH THE INVENTION, ONE FIELD OF BITS FROM A WORD IN THE NONDESTRUCTIVE READOUT MEMORY IS USED TO SWITCH A SECOND FIELD OF BITS FROM CONTROLLING ONE SET OF MICRO OPERATIONS TO ANY ONE OF SEVERED SETS. IN THE OVERALL SYSTEM, THE ONE FIELD OF BITS WAS OBTAINED NEARLY "FREE" BY SHARING BITS USED FOR BRANCH ADDRESSES.
Inventors
- 👤 Scott J Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/22; G06F9/223
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |