Central processing unit for executing instructions of variable length
CA 1186801 A · Owner: Hitachi, Ltd. · Inventors: Hirasawa, Kotaro; Hiraoka, Ryosei; Fukunaga, Yasushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, A central processing unit for use in an electronic system is designed for executing instructions of variable length in which an operand specifier, i.e. an instruction for specifying the addressing mode of an operand is, independent of an operation code for determining the kind of an operation and the number of operands. Each operand specifier is formed of one or more data bytes and has a, stop bit flag indicating whether or not the particular operand specifier is the last operand specifier. By adding the stop bit flag, the operand specifier can be shared and different processing car be executed with an identical operation code. In a case where, when operation code decoding means …
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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 May 7, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 7, 2002.
- 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.