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. 16, 1993
Filed:
Aug. 11, 1989
Joseph M Jeddeloh, Minneapolis, MN (US);
Ronald J Larson, Minneapolis, MN (US);
Jeffry V Herring, Bloomington, MN (US);
Micral, Inc., New Brighton, MN (US);
Abstract
An asynchronous memory control Unit for asynchronously controlling access to and from system memory of a microcomputer system in response to control signals from conventional and state-of-the-art microcomputer I/O buses is described. The asynchronous memory control unit of the present invention operates cooperatively with a synchronous memory control unit which provides access to and from system memory in response to command signals from a microprocessor. Whenever the microprocessor controls the bus, the synchronous memory control unit is enabled; whenever the microprocessor is not controlled of the bus at main IO bus, the asynchronous control unit is enabled.