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:
Jul. 26, 1977
Filed:
Apr. 30, 1976
Applicant:
Inventors:
Max Abbott Bouknecht, Boca Raton, FL (US);
Michael Ian Davis, Boca Raton, FL (US);
Louis Peter Vergari, Palm Springs, FL (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
364900 ;
Abstract
The interface between I/O control logic, or channel, and peripheral devices permits simultaneous transfer of command, device address, and data, and includes logic in a peripheral device control unit for dynamic change of the attached peripheral device interrupt priority level while the device may be executing a prior command. The I/O control logic includes means for initiating serial poll signalling while other transfers are taking place on the interface.