File management method, and memory card and terminal apparatus that make use of the method

A file management method for use with a memory card having a memory accessible from a first processing system within a memory card and a second processing system within a terminal apparatus configured to directly access the memory, the file management method comprising:

• requesting, by the first processing system, to second processing system, a reservation of an area of the memory;
• implementing, by the second processing system, upon receiving the requesting from the first processing system, a reserving process for an area of the memory;
• reflecting, by the second processing system, information of the area reserved in the implementing, upon file management information for the second processing system;
• and
• writing, by the first processing system, data of a file management system for the first processing system into the area reserved by the second processing system in the implementing.

A terminal apparatus that accesses a memory of a memory card and performs file management, the terminal apparatus comprising:

• a request receiver that receives a request for reserving an area of said memory from a processing system within said memory card;
• an area reserver that reserves an area of said memory based upon the request received by said request receiver;
• a file information processor that reflects information of the area reserved by said area reserver upon file management information for said terminal apparatus;
• and
• a reserve area transmitter that transmits information of the area reserved by said area reserver to the processing system within said memory card.

A memory card having a memory accessible from a processing system within said memory card and from a processing system in a terminal apparatus, said processing system within said memory card comprising:

• an area reservation requester that specifies a size and requests reservation of an area of said memory to said processing system in said terminal apparatus;
• a reserved area receiver that receives notification of a reserved area from said processing system in said terminal apparatus;
• a writer that writes data into the reserved area of said memory;
• and
• a writing location information storage that stores writing location information of the data written in the reserved area such that said processing system within said memory card alone is able to refer to the stored information.

A memory card having a memory accessible from a processing system within said memory card and from a processing system in a terminal apparatus, said processing system within said memory card comprising:

• an area reservation requester that specifies a size and requests reservation of an area of said memory to said processing system in said terminal apparatus;
• a reserve area receiver that receives notification of a reserved area from said processing system in said terminal apparatus;
• a vacant area storage that stores the reserved area and a vacant area remaining after a writing area is specified in the stored reserved area;
• a writer that writes data into the writing area specified by said vacant area storage;
• and
• a writing location information storage that stores writing location information of the data written in the writing area such that said processing system within said memory card alone is able to refer to the stored information.