Casio PA-2400W manual Comparison by List File

8.6.2 Comparison by List File

With￿this command the following comparison will be made:

Comparison between the file information transferred (copied) by the PA-2400W (parent machine) and

￿the contents of the list file (FCHK.LOG).

Comparison between the checksum data of the list file and the result of checksum calculation

￿performed again for the list file.

Comparison between the checksum data included in the list file and the result of checksum calculation

￿performed again for all the entire files that were transmitted (copied).

If list file comparison is successfully completed, a return value “0” will be passed to this command as the program termination code. If list file comparison fails, this command receives a return value that is not "0" and is abnormally terminated. In either case a history file is generated (FCHKC.HIS is created in [FCHK.LOG file pathname]). The history file is generated as track the process of comparing the

￿transmitted (copied) file and the list file.

The objective information to be compared in the files includes:

1)File size

2)Date and time of update

3)Transfer (copy) destination pathname (file name)

4)Number of transferred (copied) files

5)Checksum data of all the transferred (copied) files

￿6) Checksum data of list file

The checksum data of all the transferred (copied) files consists of the result in which each piece of double-word data in all the objective files is XORed sequentially from beginning to end.

However, the checksum data of a list file is generated to obtain the sum of each double-word contained in the list file, then a value is calculated that offsets the sum to zero. Use this offset value as the checksum data.

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