Pocket computer with means for checking the detachable memory mo

Details Pocket computer with means for checking the detachable memory mo Pocket computer with means for checking the detachable memory mo

1985-11-20

1988-03-15

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 704

Patent

active

047317485

ABSTRACT:
An electronic apparatus such as a pocket computer is of the type in which a detachable memory module can be operatively coupled. Just upon interruption of power, the apparatus generates indefinite information such as random number, time information, or the serial number, so that the indefinite information is written into both the memory module and a memory of the body of the computer. Just upon application of power, the apparatus reads the indefinite information out of the memory of the body of the computer and of a memory module presently coupled to the body to determine whether they agree with each other. Only when they agree with each other, the memory module presently coupled to the body of the apparatus will become effective.

REFERENCES:
patent: 4400783 (1983-08-01), Locke, Jr. et al.
patent: 4564922 (1986-01-01), Muller
patent: 4584663 (1986-04-01), Tanikawa

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