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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.:

US 4225942 B1

PDFFull Text
Date of Patent:
Sep. 30, 1980

Filed:

Dec. 26, 1978

Daisy chaining of device interrupts in a cathode ray tube device

Applicant:
Inventors:

Frederick E Kobs, Pepperell, MA (US);

Joseph L Ryan, Nashua, NH (US);

Minoru Inoshita, Glendale, AZ (US);

Gerald N Winfrey, Billerica, MA (US);

Assignee:

Honeywell Information Systems Inc., Waltham, MA (US);

Attorneys:

Grayson; George

Prasinos; Nicholas

Reiling; Ronald T.

Primary Examiner:

Leo H Boudreau

Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364900 ;
Abstract

A microprocessor controlled cathode ray tube display system has a plurality of peripheral devices all connected in common to a system bus. Apparatus in each peripheral device activates a single interrupt signal. A single acknowledge response signal to all the devices enables the interrupting device to place its address signals on the system bus thereby initiating a firmware routine for making the interrupting device operative with the system.

Find Patent Forward Citations

Kobs, Frederick. (1980). Daisy chaining of device interrupts in a cathode ray tube device (U.S. Patent No. 4225942). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4225942

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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