Int 21 Fn C2  - Novell Netware - Synchronization Services - Lock Physical  [N]

   AH = C2h
   AL = flags
       bit 1: non-exclusive lock
   BP = lock timeout in timer ticks (1/18 sec) 0000h = no wait

Return: AL = status
       00h successful
       FEh timed out
       FFh failed
Desc:  attempt to lock all physical records listed in the log table

Notes: this function is supported by NetWare 4.6+, Advanced NetWare 1.0+, and
     Alloy NTNX
   status FFh will be returned if one or more physical records have been
     exclusively locked by another process

See Also: AH=BFh,AH=C3h,AH=D1h