mtools: directory

 
 2.3 Current working directory
 =============================
 
 The 'mcd' command (⇒mcd) is used to establish the device and the
 current working directory (relative to the MS-DOS file system),
 otherwise the default is assumed to be 'A:/'.  However, unlike MS-DOS,
 there is only one working directory for all drives, and not one per
 drive.