INT 21 - Novell NetWare - SYNCHRONIZATION SERVICES - LOG LOGICAL RECORD
        AH = D0h
        DS:DX -> record string (counted string, max 99 data bytes)
        if function C6h lock mode 01h: (Novell, NTNX only)
            AL = flags
                bit 0: lock as well as log the record
                bit 1: non-exclusive lock
            BP = lock timeout in timer ticks (1/18 sec)
Return: AL = status
            00h successful
            96h no dynamic memory for file
            FEh timed out
            FFh unsuccessful
Desc:   add the specified logical record name to the log table, and optionally
          lock the record
Notes:  this function is supported by NetWare 4.6+, Advanced NetWare 1.0+,
          Banyan VINES, and Alloy NTNX
        locks on logical record names are advisory and may be ignored by other
          applications
SeeAlso: AH=D1h,AH=D2h,AH=D4h,AH=EBh