INT 7A - Novell NetWare - SPX Driver - LISTEN FOR SPX PACKET                    
	BX = 0017h
	DX = connection ID (unused in v2.15)
	ES:SI -> Event Control Block (see BX=0003h)
Notes:	this function is supported by Advanced NetWare 2.1+
	CX may need to be 0001h ???
SeeAlso: BX=0011h,BX=0016h