Computer system speed control at continuous processor speed
CA 1296807 C · Owner: Culley, Paul R. · Inventors: Culley, Paul R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A personal computer is disclosed having a high speed microprocessor which executes in a variety of selectable speed modes to provide greater compatibility with application programs written for slower speed microprocessors. A logic means is included responsive to the speed select signal which does not change the speed of the microprocessor oscillator (clock) but rather changes the length of a wait state or "STOP" state of the microprocessor. The "STOP" state of the microprocessor is varied by varying the time delay setting of a one-shot timer. The one-shot timer keeps the "STOP" request active and therefore keeps the microprocessor (CPU) from running bus cycles (executing code) until the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.