Portable electronic device capable of selectively providing unus

Details Portable electronic device capable of selectively providing unus Portable electronic device capable of selectively providing unus

1991-06-06

1994-08-16

Dixon, Joseph L.

Boots, shoes, and leggings

364DIG1, 364244, 364243, G06F 1200

Patent

active

053394003

ABSTRACT:
A portable electronic device which can be connected to an external device comprises a memory, having a storage area of a predetermined storage capacity, for storing information, a CPU for controlling read/write access of information for the memory, a program memory for storing program data for determining an operation of the CPU, and a connector for connecting the CPU to the external device. The CPU has a function of dividing the storage area of the memory into a plurality of first storage areas, a function of dividing a portion of the plurality of first storage areas into a plurality second storage areas, a function of detecting a storage size of each of the plurality of second storage areas, and a function of obtaining an unused storage capacity of the first storage area on the basis of the detected storage sizes of the plurality of second storage areas, and the storage capacity of the memory, and sending back the obtained result to the external device.

REFERENCES:
patent: 4748320 (1988-05-01), Yorimoto et al.
patent: 4755660 (1988-07-01), Nakano
patent: 4780815 (1988-10-01), Shiota
patent: 4797543 (1989-01-01), Watanabe
patent: 4831245 (1989-05-01), Ogasawara
patent: 4833595 (1989-05-01), Iijima
patent: 4891506 (1990-01-01), Yoshimatsu
patent: 4908789 (1990-03-01), Blokkum et al.

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