Int 7A  - Novell Netware - Ipx Driver - Listen For Packet                  [N]

   BX = 0004h
   ES:SI -> Event Control Block (see BX=0003h)

Return: AL = status
       00h successful
       FFh no listening socket for packet
Desc:  this function provides IPX with an ECB for receiving an IPX packet, but
     does not wait for a packet to arrive

Notes: the application must open a socket and initialize the ECB's ESR
     address, socket number, fragment count, and fragment descriptor
     fields before invoking this function
   there is no limit on the number of ECBs which may simultaneously be
     listening on a socket
   this function is supported by Advanced NetWare 1.02+

See Also: BX=0000h,BX=0003h