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:
Feb. 15, 1983
Filed:
Aug. 08, 1979
Toshihiro Sakai, Kawasaki, JP;
Tetsuji Kuhara, Matsudo, JP;
Fujitsu Limited, Kawasaki, JP;
USAC Electronic Industrial Co., Ltd., Ishikawa, JP;
Abstract
In a data processing system in which a data processing unit has an M-bit address register and is connected via an N-bit address bus with a memory (where N<M<2n), the content of the address register is sent out on the address bus in two stages. Namely, high-order N bits of the address register are sent out first, and low-order N-bits are sent out next. One of the bits of the address register is sent out twice by the first and second sending-out operations. The system includes, in combination, various gates and a multiplexer to accomplish data transfer selectively for both virtual memory and real memory operation.