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:
Apr. 05, 1983
Filed:
Oct. 06, 1980
Thomas O Holtey, Newton, MA (US);
Richard P Kelly, Nashua, NH (US);
Steven S Noyes, Framingham, MA (US);
James C Raymond, Framingham, MA (US);
Honeywell Information Systems Inc., Waltham, MA (US);
Abstract
A data processing system includes a communications subsystem communicating with a number of devices. A counter monitors the communication line to detect when a communication line goes idle, that is at least 15 successive binary ONE bits appear on the line for the bit oriented protocol mode. The counter advances on successive binary ONE bits and is forced to a hexadecimal ZERO in response to a binary ZERO. If the counter reaches a count of hexadecimal F (decimal 15) a carry signal from the counter prevents the counter from advancing and initiates an idle link state.