Interesting article on Emulation in general, giving everything from a slice of history to a slice of 'where to start' if you're a budding Emulation designer.
Link:http://www.atomicmpc.com.au/article.asp?SCID=&CIID=77511
Link:http://www.atomicmpc.com.au/article.asp?SCID=&CIID=77511