DOS Command Comp
Syntax:
COMP [d:][path][filename] [d:][path][filename]
[/A][/C][/D][/L][/N:(number)]
Purpose: Compares two groups of
files to find information that does not match. (In DOS Version 6,
this program is stored on the DOS supplemental disk.)
Discussion
Compares two files or two groups of files. The
files can have the same names, or different names. Wildcard
characters (? and *) can be used to specify groups of files to be
compared (files of the same names will be compared).
Each set of specified files will be compared, one set at a time.
Before starting the comparison, the program checks to see if files
contain a valid end-of-file mark. COMP will not compare files that
do not contain an end-of-file marker. If a specified file does not
contain such a mark, the following error message will be displayed:
EOF mark not found
This mark is created by your word processor or other application
program to indicate the end of the file. You can create the end-
of-file marker by pressing and holding the Ctrl key and then
pressing the letter Z key.
The COMP program also checks to make sure the file sizes indicated
in the directory are the same for compared files; a comparison is
not carried out if the files are stored as different sizes.
If you enter one or more pathnames or filenames after the command
name, when you press the Enter key the comparison will begin
immediately; therefore, you should make sure the diskette(s)
containing the files to be compared are already in the specified
drives. If you want to change diskettes after entering the command,
enter the command name with no following parameters. If you enter
the COMP command with no options , the program will prompt you for
the file and/or path designations.
First, the program will display:
Enter primary filename
Enter the name of the first file or group of files. Next, the
program will display:
Enter 2nd filename or drive ID
After you enter the second filename(s), the program will compare the
files, issuing reports on its progress.
If the files are identical, it will report:
Files compare OK
If the files are not identical, it will report on the differences it
finds.
COMP will display the memory locations of any portions of the
compared files that do not match. After ten mismatches, the program
terminates the comparison. The following message is displayed
10 Mismatches - ending compare
After all pairs specified have been compared, COMP will display
Compare more files (Y/N)?
To enter more files to compare, press the letter Y key. To terminate
the comparisons, press the letter N key.
Options
/A - Displays the differences found
between compared files as characters.
/C - Performs a comparison that is not case-sensitive.
/D - Displays the differences found between compared files in
decimal format. (The default format is hexadecimal.)
/L - Displays the number of the line where the difference occurred,
rather than the byte offset.
/N:(number) - Allows you to enter the number of lines in both files
that will be compared, even if the files are of different sizes.
This page is from http://www.easydos.com. I pasted it on my website to avoid possible broken links. For further help with DOS commands, Check easydos.com out.