The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 23, 1993
Filed:
Oct. 28, 1991
Mikio Ito, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A request is issued in response to an instruction to a memory buffer control unit in accordance with one of first and second specific access methods. The request comprises a request code and a memory address. The first specific access method comprises the steps of holding preliminarily the request code in a register, producing the memory address by using an address syllable included in the instruction, and delivering the memory address and the request code held in the register to the memory buffer control unit. The second specific access method comprises the steps of holding preliminarily indication data in a register, judging whether or not an address syllable has in the instruction a base register number equal to a specific number, producing an effective address by using the address syllable, and delivering the request code and the memory address to the memory buffer control unit by using the indication data held in the register and the effective address when the base register number is equal to the specific number.