How to build RAM size >2^N for an N-bit computer?

[magnus]

In the present architecture, it seems that the maximum size of RAM that you can build is limited by the width of our bus, which here is 2^16=65536. What do you do if you need/want more RAM in such an architecture? Every time I try to think of a solution, it feels like I'm going to have to greatly increase the complexity of the overall architecture; is that correct? Is there a software solution?

[ivant]

The technique is called bank switching. Here is the wikipedia article and here are some other threads in this forum which discuss it.