Int 21 Fn 6C01  U - Os/2 V2.0 - "dosopen2"                                 [O]

   AX = 6C01h
   BL = open mode as in AL for normal open (see also AH=3Dh)
       bit 7: inheritance
       bits 4-6: sharing mode
       bit 3 reserved
       bits 0-2: access mode
   BH = flags
       bit 6 = auto commit on every write (see also AH=68h)
       bit 5 = return error rather than doing INT 24h
   CX = create attribute (see #1458)
   DL = action if file exists/does not exist (see #1459)
   DH = 00h (reserved)
   DS:SI -> ASCIZ file name
   ES:DI -> EAOP structure

Return: CF set on error
      AX = error code (see #1366 at AH=59h/BX=0000h)
   CF clear if successful
      AX = file handle
      CX = status (see #1457)

Note:  this function is virtually identical to AX=6C00h, but supports OS/2's
     extended attributes

See Also: AX=5704h,AX=6C00h,AH=6Fh"OS/2"