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Church Of The
Swimming Elephant



Debug: N--Notes

The two uses of the n command

You can use the n command in two ways. First, you can use it to specify a file to be used by a later l (load) or w (write) command. If you start Debug without naming a file to be debugged, you must use the command nfilename before you can use the l command to load the file. The filename is correctly formatted for a file control block (FCB) at CS:5C. Second, you can use the n command to specify command-line parameters and switches for the file being debugged.

Memory areas

The following four areas of memory can be affected by the n command:

Memory location
File control block (FCB) for file 1
File control block (FCB) for file 2
Length of n command line (in characters)
Beginning of n command-line characters

The first filename you specify for the n command is placed in a FCB at CS:5C. If you specify a second filename, this name is placed in an FCB at CS:6C. The number of characters typed on the n command line (exclusive of the first character, n) is stored at location CS:80. The actual characters on the n command line (again, exclusive of the letter n) are stored beginning at CS:81. Note that these characters can be any switches and delimiters that would be legal in a command typed at the Windows NT prompt.

More Information About Debug: N

ntcmds00000001.gif Debug: N--Examples

ntcmds00000001.gif Debug: N


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