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. 03, 2002
Filed:
Dec. 16, 1998
Applicant:
Inventor:
David Egolf, Glendale, AZ (US);
Assignee:
Bull HN Information Systems Inc., Bilerica, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 9/44 ;
U.S. Cl.
CPC ...
G06F 9/44 ;
Abstract
When emulating a Target architecture on a Host system having a different architecture, virtual to real address translation is typically expensive in terms of computer cycles. The cost can be significantly reduced by utilizing direct page table pointers to short-circuit the address translation. In a system additionally supporting segments framing portions of virtual memory, the direct page table pointers are associated with segment registers and point to the page table entry corresponding to the first location in a segment. Direct page table pointers are invalidated when underlying virtual memory management tables are modified.