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:
May. 09, 1989
Filed:
May. 01, 1987
Applicant:
Inventors:
Darrel D Donaldson, Lancaster, MA (US);
Richard B Gillett, Jr, Westford, MA (US);
Douglas D Williams, Pepperell, MA (US);
Assignee:
Digital Equipment Corporation, Maynard, MA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J / ;
U.S. Cl.
CPC ...
370 85 ;
Abstract
An interface system between a high speed user bus and a system bus is provided to present to the user bus a picture of the data transferred on the system bus every clock cycle of that system bus. The interface system also allows the user bus to transfer data back to the system bus during selected bus cycles. By using a single pin connection to the system bus, the user bus can send communications back to itself by way of the system bus.