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:
Jul. 28, 1998
Filed:
Apr. 08, 1997
Hideto Niijima, Tokyo, JP;
Akashi Satoh, Kamifukuoka, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
With the present invention, the page table of the program code non-continuously placed in an external storage device using randomly accessible and rewritable memory is built into an executable sequence in a virtual address space of the CPU according to the execution order. By referring to the address translation tables, including the page table, the system is able to read the program from the external storage device, thereby executing the program. Therefore, the program can be executed without being loaded into main memory. Furthermore, the program and data can be managed without distinction. Further, with the randomly accessible memory according to the present invention, since a sequence of real addresses of the CPU are assigned to the data area, control over the direct execution of the program can be simply achieved. Furthermore, since data and ECC parity can also be read and written sequentially, the system has good compatibility with a hard disk system. Since the data and Ecc parity are present on the same word line and can be accessed without changing the page address, simple control is achieved.