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:
Sep. 08, 1992
Filed:
Jan. 29, 1990
Applicant:
Inventors:
Bruce E Whittaker, Mission Viejo, CA (US);
Saul Barajas, Capistrano Beach, CA (US);
Leland E Watson, Mission Viejo, CA (US);
Assignee:
Unisys Corporation, Blue Bell, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395725 ; 3642853 ; 3642429 ;
Abstract
Arbitration and control circuitry for monitoring the two processors sharing a system bus to insure fair access to system resources and to sense error conditions which occur in order to hold access for the processor involved until the error condition is cleared. The arbitration circuitry provides for two levels of bus access requests where one level involves normal requests and a second level involves priority request which take precedence over normal requests.