Int 2F Fn 1105  CU - Network Redirector - Chdir                            [N]

   AX = 1105h
   SS = DOS DS
   SDA first filename pointer -> fully-qualified directory name
   SDA CDS pointer -> current directory structure for drive with dir

Return: CF set on error
       AX = DOS error code (see #1366 at INT 21/AH=59h/BX=0000h)
   CF clear if successful
       CDS updated with new path

Notes: this function is called by the DOS 3.1+ kernel
   directory string in CDS should not have a terminating backslash unless
     the current directory is the root

See Also: AX=1101h,AX=1103h,INT 21/AH=3Bh,INT 21/AH=60h