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:
Jan. 04, 1994
Filed:
Apr. 24, 1992
Luis A Hernandez, Boca Raton, FL (US);
Mitchell E Medford, Delray Beach, FL (US);
Esmaeil Tashakori, Delray Beach, FL (US);
International Business Machines Corp., Armonk, NY (US);
Abstract
This invention relates to personal computers having the capability for the usual system controlling processor to be reset, initialized and then isolated if an alternate system controller is provided for the system. In accordance with this invention, a personal computer system has a high speed local processor data bus; an input/output data bus; a microprocessor coupled directly to the local processor bus; a connector coupled directly to the local processor bus for accommodating reception of an alternate system controller; and a bus interface controller coupled directly to the local processor bus and directly to the input/output data bus for providing communications between the local processor bus and the input/output data bus, with the bus interface controller providing for detection of an error signal generated by an alternate system controller mounted in the connector and indicative of the failure of the alternate system controller. In response to detection of the error signal, the bus interface controller transfers control of the local processor bus from the alternate system controller to the microprocessor.