Method for modification of data on a memory card on a...

Details Method for modification of data on a memory card on a... Method for modification of data on a memory card on a...

2006-12-05

2006-12-05

Bragdon, Reginald G. (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S103000, C711S104000, C711S115000

Reexamination Certificate

active

07146472

ABSTRACT:
A method for modification of data in a card transaction system having a memory card and a reader for reading the card. The card has a first memory (RAM) and a second memory (EEPROM) with data locations occupied by data recordings. Each transaction involves the modification of at least one of the data locations or the addition of a new recording. The method reads the address of a free location from a previous control register located in a first fixed location in the EEPROM memory, writes the new modified recording or addition in the free location, repeat the steps for each new recording to be modified or added, and writes in a second fixed location in the EEPROM memory a new control register containing the addresses of free locations within the EEPROM memory to use in the next transaction.

REFERENCES:
patent: 5987563 (1999-11-01), Itoh et al.
patent: 5987572 (1999-11-01), Weidner et al.
patent: 6347355 (2002-02-01), Kondo et al.
patent: WO96/25743 (1996-08-01), None
patent: WO99/33059 (1999-07-01), None
Nijjima, H., “Design of a Solid-State File Using Flash EEPROM”,IBM Journal of Research and Development, IBM Corporation, Armonk, US, vol. 39, No. 5, pp. 531-545 (1995).

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