# Debug

Starts Debug.exe, a program you can use to test and debug MS-DOS executable files. Used without parameters, debug starts Debug.exe and the debug prompt appears, which is represented by a hyphen (-).

### Syntax

debug [[Drive:][Path] FileName [parameters]]

### Parameters

[ Drive : ][ Path ] FileName   : Specifies the location and name of the executable file that you want to test.

parameters   : Specifies any command-line information required by the executable file that you want to test.

? : Displays a list of debug subcommands.

### Remarks

• Windows XP does not use this command. It is accepted only for compatibility with MS-DOS files.

• Using MS-DOS subsystem commands

Debug is a MS-DOS subsystem command that runs under WOW/NTVDM.

• Separating command parameters

You can separate parameters with a comma or white space, but these separators are required only between two hexadecimal values. For example, the following commands are equivalent:

dcs:100 110

d cs:100 110

d,cs:100,110

• Using debug subcommands

There are several debug subcommands that you can use. For more information about debug subcommands, see Related Topics.

### Formatting legend

Format

Meaning

Italic

Information that the user must supply

Bold

Elements that the user must type exactly as shown

Ellipsis (...)

Parameter that can be repeated several times in a command line

Between brackets ([])

Optional items

Between braces ({}); choices separated by pipe (|). Example: {even|odd}

Set of choices from which the user must choose only one

Courier font

Code or program output

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