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:
Sep. 30, 1980
Filed:
Feb. 05, 1976
Edward C Hepworth, Austin, TX (US);
Rodney J Means, Tempe, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A data processing system in which a central processor polls one or more peripheral devices to initiate a data transfer or to enable a data transfer. The system includes logic associated with a peripheral device or with an interface device for sensing the occurrence of data handling errors such as parity errors, carrier loss, clear to send loss, data overrun or underflow, and for interrupting the central processor upon such occurrence to avoid polling that peripheral device unnecessarily. A status signal is also generated to inform the processor of the nature of the interrupt, so as to distinguish from, for example, the interrupt of another device which is operative to communicate by means of such interrupt rather than by polling.