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:
Nov. 26, 1991
Filed:
Aug. 01, 1989
William Bruckert, Northboro, MA (US);
David Kovalcin, Grafton, MA (US);
Thomas D Bissett, Derry, NH (US);
John Munzer, Brookline, MA (US);
Dennis Mazur, Worcester, MA (US);
Peter R Mott, Jr, Worcester, MA (US);
Glenn A Dearth, Hudson, MA (US);
Carlos Alonso, Marlboro, MA (US);
Ann Katan, Newton Highlands, MA (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
Method and apparatus for controlling initiating of bootstrap loading in a computer system having first and second discrete computing zones is disclosed. Each computing zone includes a status register for storing an operating system run (OSR) bit indicating that the zone has initiated bootstrap loading. A cable connects the computing zones to allow the first and second zones to read the status registers in the second and first zones, respectively. A CPU in each zone only enables initiation of bootstrap loading if the OSR bit in the other zone is not set.