Mmd will allow the following command line option:
Reasonable care is taken to create a valid MSDOS directory name. If an invalid name is specified, mmd will change the name (and display the new name if the verbose mode is set).
An error occurs if the directory already exists.
MSDOS subdirectory names are supported with either the '/' or '\' separator. The use of the '\' separator or wildcards will require the directory name to be enclosed in quotes to protect it from the shell.
The mcd command may be used to establish the device and the current working directory (relative to MSDOS), otherwise the default is A:/.
Mmd returns 0 on success, 1 on utter failure, or 2 on partial failure.