Registers – Systems controlled by data bearing records – Credit or identification card systems
Patent
1990-03-09
1992-11-17
Shepperd, John W.
Registers
Systems controlled by data bearing records
Credit or identification card systems
235492, G06K 500, G06K 1906
Patent
active
051650436
ABSTRACT:
A memory card comprises an index area, and a data area including a plurality of extents in each of which data is recorded. The index area includes in correspondence with each of the extents, an area for entering a file name, a status indicating area for entering the number of bytes to be recorded per sector, and areas for entering the beginning and end addresses of the corresponding extent, respectively. The memory card is accessed in such a way that the index area is read to decide if a desired file name exists, and that the status indicating area is read subject to the existence of the desired file name. A control unit translates an address premised on a floppy disc into an address for accessing the memory card, on the basis of the number of bytes entered in the status indicating area, and then accesses the memory card.
REFERENCES:
patent: 4841131 (1989-06-01), Iijima
patent: 4849614 (1989-07-01), Watanabe et al.
patent: 4868376 (1989-09-01), Lessin et al.
patent: 4887234 (1989-12-01), Iijima
patent: 4901276 (1990-02-01), Iijima
patent: 4949240 (1990-08-01), Iijima
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Kikuta Shigeo
Miyahara Koji
Yokoyama Tateo
Hitachi , Ltd.
Nguyen Tan
Shepperd John W.
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