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:
May. 18, 1993
Filed:
Apr. 03, 1989
Applicant:
Inventors:
Frederik Zandveld, Apeldoorn, NL;
J A Kindervater, Apeldoorn, NL;
Assignee:
Digital Equipment Corporation, Maynard, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395325 ; 395425 ; 364D / ; 3642402 ; 3642384 ; 3642543 ;
Abstract
A processor in a computer system is connected, together with one or more control units of peripheral apparatus, to the main memory via a main bus. For a very fast processor the storage capacity of the main memory should be so high that the full physical address can no longer be transported via the main bus in one operation. In that case an additional communication line is provided between the processor and the main memory. In order to enable peripheral apparatus to access the entire main memory anyway, a second memory management unit is connected between the main bus and the main memory.