INT 21 - DOS 1+ - CREATE OR TRUNCATE FILE USING FCBsee File Control Block
	AH = 16h
	DS:DX -> unopened FCBsee File Control Block (see #01345), wildcards not allowed
Return: AL = status
	    00h successful
	    FFh directory full or file exists and is read-only or locked
Notes:	if file already exists, it is truncated to zero length
	if an extended FCBsee File Control Block is used, the file is given the attribute in the
	  FCBsee File Control Block; this is how to create a volume label in the disk's root dir
	not supported by MS Windows 3.0 DOSX.EXE DOS extender
	(FAT32 drive) this function will only succeed for creating a volume
	  label; FAT32 does not support FCBs for file I/O
SeeAlso: AH=0Fh,AH=10h,AH=3Ch