Int 21 Fn CA  O - Novell Netware, Alloy Ntnx - Log/lock Personal File (fc  [N]

   AH = CAh
   DS:DX -> FCB (see #1034 at AH=0Fh)
   if function C6h lock mode 01h:
       AL = log and lock flag
       00h log file only
       01h lock as well as log file
       BP = lock timeout in timer ticks (1/18 sec)

Return: AL = error code
       00h successful
       96h no dynamic memory for file
       FEh timeout
       FFh failed
Desc:  provides file locking support for FCBs

Note:  this function was added in NetWare 4.0, but was removed some time prior
     to Advanced NetWare 2.15, and is no longer listed in current Novell
     documentation

See Also: AH=CBh