Computer with interface for fast and slow memory cycles
CA 1293329 C · Owner: Moore, Robin B. · Inventors: Moore, Robin B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A CPU with an interface to two different RAMs which operate at different rates. The interface circuit includes a decoder which examines the addresses from the CPU and determines whether a faster cycle or slower cycle is needed. The slow RAM provides video signals to a video display. The fast RAM includes an image of the video signals stored in the first RAM. When the video signals are read by the CPU, they are read only from the fast RAM however, when it is, necessary to update the video signals they are written into both the, slow and fast RAMs.
Read the whole patent
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 December 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 2008.
- 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.