DS:DX address of an ASCIIZ string of a filespec
DS:DX points to an ASCIIZ string in the form...
...which identifies the location and name of the file. It must
not contain wildcards , but it may identify a directory name.
If CF is set on return, an error code is in AX and no action was
Notes: To add an attribute to an existing value, use fn 4300H to
obtain the current setting, OR the desired new attribute bit,
Bits 3 and 4 of CX (volume label and directory) must be clear
when calling this function. If you wish to hide a directory,
use CX=02H (not 12H as you might expect).
See Also: Fn 4300H (query file attributes)