Equate operand address space control system
CA 1087754 A · Owner: International Business Machines Corporation · Inventors: Hood, Robert A.; Birney, Richard E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Equate operand spaces (EOS) control over the addressabilities provided by different address keys in an address key register (AKR) in a processor. When enabled, the EOS control forces each source operand access to occur within the sink operand addressability specified in the AKR, even though the AKR explicitly specifies a different addressability for source operands. When the EOS feature is disabled the source, operand addressability contained in the AKR is used when fetching source operands. An EOS field in the AKR stores whether the EOS state is enabled in the processor. The EOS field is connected to active address key (AAK) select circuits. When the EOS state is enabled it outgates from …
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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 October 14, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 14, 1997.
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Timeline
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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.