Format of PC-MOS/386 directory information:
Offset	Size	Description	)
 00h	BYTE	reserved (0)
 01h	BYTE	file class ('A'-'Z' or 00h)
 02h	DWORD	user ID of file creator
 06h	WORD	file creation time (see #01665 at INT 21/AX=5700h)
 08h	WORD	file creation date (see #01666 at INT 21/AX=5700h)