Int 60 Fn 13  - 3com, 10net, Banyan Vines - Unlock                         [N]

   AH = 13h
   AL = drive number or 00h
   ES:SI = Ethernet address or 0000h:0000h
   DS:BX -> 31-byte ASCIZ semaphore name

Return: AL = status (see also AH=11h)
       01h semaphore not locked

See Also: AH=11h,AH=12h