Checksum writing method and checksum checking apparatus

Details Checksum writing method and checksum checking apparatus Checksum writing method and checksum checking apparatus

2004-02-10

2008-03-25

Chaudry, Mujtaba K. (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S807000

Reexamination Certificate

active

07350135

ABSTRACT:
A more convenient checksum writing method and checksum checking apparatus. The method includes: calculating a first checksum by reading values from the memory and summing the read values; calculating a first mode checksum by subtracting values written in a predetermined area of the memory from the first checksum; initializing a second checksum to be zero if the first mode checksum does not meet a predetermined condition; calculating a second mode checksum by inverting the second checksum and adding the inverted second checksum to the first mode checksum; and writing the inverted second checksum value in the predetermined area of the memory, if the second mode checksum is equal to the second checksum.

REFERENCES:
patent: 5493649 (1996-02-01), Slivka et al.
patent: 5663952 (1997-09-01), Gentry, Jr.
patent: 6098194 (2000-08-01), Rinne et al.
patent: 6324661 (2001-11-01), Gerbault et al.
patent: 6438056 (2002-08-01), Aue
patent: 6643821 (2003-11-01), Karim et al.
patent: 2003/0076794 (2003-04-01), Kawasaki et al.
patent: 62-1043 (1987-01-01), None
Saxena et al., Analysis of Checksums, Extended-Precision Checksums and Cyclic Redundancy Checks, Jul. 1990, IEEE, vol. 39., pp. 969-975.

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