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:
Nov. 11, 1986
Filed:
Oct. 28, 1983
Chandra R Vora, Northboro, MA (US);
Michael L Ziegler, Whitinsville, MA (US);
Mark Bagula, Morgan Hill, CA (US);
Steve Hamilton, Los Gatos, CA (US);
Data General Corporation, Westboro, MA (US);
Abstract
In a data processing system which uses a common bus for communication of address and data information among a plurality of system components, a bus timing technique uses a clock signal having a transfer time period which comprises a plurality of subperiods which requires address transfer to take place during a first selected group of subperiods and data to be transferred during a second selected group of subperiods with idle subperiods in between. A first control signal is generated by the data receiving or data supplying unit in order to inhibit access to the bus until such transfer is completed and a second control signal can be provided to lock-in bus access by such unit if desired for more than one transfer period. Appropriate priority is arranged for bus access among selected system components whether the common bus system has a single bus for use with a single port memory or a dual bus for use with a dual port memory.