INT 21 - Novell NetWare - TRANSACTION TRACKING SYSTEM - TRANSACTION STATUS
        AX = C704h
        CX:DX = transaction number (see AX=C701h)
Return: AL = status
            00h successful
            FFh not yet written to disk
Desc:   verify that a transaction has actually been written to disk
Notes:  this function is supported by NetWare 4.0+ and Advanced NetWare 1.0+
        transactions are written to disk in the order in which they are ended,
          but it may take as much as five seconds for the data to be written
SeeAlso: AX=C701h,AX=C703h