Int 21 Fn C8  O - Novell Netware - Begin Logical File Locking              [N]

   AH = C8h
   if function C6h lock mode 00h:
       DL = mode
       00h no wait
       01h wait
   if function C6h lock mode 01h:
       BP = timeout in timer ticks (1/18 sec)

Return: AL = error code
Desc:  used to provide TTS support for applications which are not aware of
     Novell's Transaction Tracking System

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=C9h