This expansion is designed for the A500, A2000 and CDTV and includes a newer Agnus (as found in the A3000) to allow them to address 2MB of CHIP RAM. The megachip has a wire which needs connecting to either the 68000 CPU socket or pin 36 on the Gary Chip. It might depend on your configuration as to whether this wire should be connected to the 68000 socket or the gary chip. If you get spurious lockups and crashes once the Megachip has been installed then this might be fixed by connecting the wire to the 68000 socket instead of the Gary chip. Furthermore the Megachip may still function correctly in a damaged Agnus socket, even if the original Agnus doesn't because it has longer legs which make good contact with the socket.

Thanks to Michael Czajka and Ron Mascaro.