the connection between the nios2 and lan91c11

We copied the design from the Nios development board Cyclone II edition and it works fine. There might be problems while compiling with SOPC Builder 6.1 instead 6.0 (we have not isolated a bug yet).

  alt_putstr("-------------------------------------------------------------------------------\n");
  alt_putstr("- LAN91C111 access test                                                       -\n");
  alt_putstr("-------------------------------------------------------------------------------\n");
  alt_putstr(" direction | address    | data       | comment\n");
  alt_putstr("-------------------------------------------------------------------------------\n");
  addr = LAN91C111_BASE + LAN91C111_LAN91C111_REGISTERS_OFFSET + 0xE;
  data16 = IORD_16DIRECT(addr, 0);
  alt_printf(" READ16    | 0x%x | 0x%x | check which register bank is selected\n", addr, data16);
  data16 = 0x0003;
  IOWR_16DIRECT(addr, 0, data16);
  alt_printf(" WRITE16   | 0x%x | 0x%x | selection of register bank 3 (16 bit write)\n", addr, data16);
  data16 = IORD_16DIRECT(addr, 0);
  alt_printf(" READ16    | 0x%x | 0x%x | check register bank selection (expected 0x3303)\n", addr, data16);
  alt_putstr("-------------------------------------------------------------------------------\n");
  addr = LAN91C111_BASE + LAN91C111_LAN91C111_REGISTERS_OFFSET + 0xC;
  data32 = 0x00030000;
  IOWR_16DIRECT(addr, 0, data32);
  alt_printf(" WRITE32   | 0x%x | 0x%x | selection of register bank 3 (32 bit write)\n", addr, data32);
  data32 = IORD_32DIRECT(addr, 0);
  alt_printf(" READ32    | 0x%x | 0x%x | check register bank selection (expected 0x3303XXXX)\n", addr, data32);
  alt_putstr("-------------------------------------------------------------------------------\n");
  addr = LAN91C111_BASE + LAN91C111_LAN91C111_REGISTERS_OFFSET + 0xA;
  data16 = IORD_16DIRECT(addr, 0);
  alt_printf(" READ16    | 0x%x | 0x%x | read the revision register (expected 0x3391)\n", addr, data16);
  alt_putstr("-------------------------------------------------------------------------------\n");