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:
Aug. 28, 1984
Filed:
Sep. 21, 1981
Applicant:
Inventor:
Michael F Berger, Fort Worth, TX (US);
Assignee:
Tandy Corporation, Fort Worth, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364900 ;
Abstract
An input/output bus structure for a computer system is disclosed in which the computer's central processor is fully protected from 'foreign' I/O devices in that all of the incoming and outgoing bus signals are buffered and the buffer stores can be disabled under software control. To attach an input/output device on the input/output bus, certain requirements, both hardware and software, must be met. The input/output bus is enabled by writing a predetermined bit pattern to a preselected output port. In response to the bit pattern, hardware in the input/output port enables the input/output bus tranceivers to receive and send information.