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:
Apr. 01, 1997
Filed:
Aug. 24, 1994
Kaori Ichikawa, Tokyo, JP;
Olympus Optical Co., Ltd., , JP;
Abstract
The present invention is characterized in that in a system for accessing an optical card under the control of a general-purpose operating system (OS), the directory format of the optical card is such that directory data items for various types of general-purpose OS are divided into information usable in common in a plurality of different operating systems and control information peculiar to specific operating systems, and then the information usable in common is set in a common directory area, and the control information is set in individual information areas, thereby forming data items in a general-purpose format, and that when the CPU accesses the optical card, the control information suited for the operating system running on the CPU and the data in the common directory area are extracted from the data in the directory in the general-purpose format, and then these data items are recombined into a data format suited for the directory format of the operating system, and when the optical card is written into, information usable in common in a plurality of different operating systems and control information peculiar to specific operating systems are separated from the directory data given by the operating system running on the CPU, and these data items are recombined into the directory data in the general-purpose format where the information usable in common is set in the common directory area and the control information is set in the individual information areas, and the recombined data is handed over to the optical card.