
Econet broadcast transmissions:
  Network 0xfe (long broadcast)
  Station 0xff

Port numbers
   0x01 is used for IPX socket 0x4000
     .                            .
     .                            .
     .                            .
   0x50 is used for IPX socket 0x404f
   0x51 is used for packet forwarding to other networks
   0x52 is used for IPX socket 0x451
   0x53 is used for IPX socket 0x452

Original IPX header
   unsigned short CheckSum,      always -1 not transmitted
                  Length;        not transmitted
   char TransportControl;        always 0 not transmitted
   char PacketType;              put in control byte
   struct Address Destination,   transmitted in full
                  Source;        transmitted in full
