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:
Oct. 29, 1991
Filed:
Jan. 03, 1990
Hiroki Masuda, Yokohama, JP;
Tetsuo Kawamata, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A group of control registers for controlling a plurality of input output devices respectively are formed in random access memory which is connected to a microprocessor bus of an input output control device. A history of a program mode access from a central processing apparatus to the RAM is recorded in a first-in first-out memory (FIFO). The microprocessor of the input output control device reads an access information of the FIFO, accesses the group of the control registers on the RAM, and controls the input output device according to the read control information. Thus, control of a plurality of input output devices is carried out by one input output device.