I would rule out anything that does any sort of split screen effect because of their need for relatively tight timings. This includes any game that scrolls horizontally but has a HUD that doesn't (a split is used between the HUD and the scenery). I know somebody who tried started with Pinball, and it
did seem to start... except because the ball then would move erratically on the plunger. No idea how much of the CPU was emulated at the time, but truth is that most games just plain won't run until nearly all of the system is emulated.
thefox wrote:
If you have any skills in NES programming (which is a good skill to have anyways if you're developing an emulator), you could write your own "easy to emulate" ROM or ROMs (with a limited set of CPU instructions and CPU/PPU interaction).
This is useful to start, but eventually you want to try games once you got enough =P
Also I'd say, if you want to make an emulator for any system, first you should have gotten accustomed to programming it, this way then you'll get a rough idea of how the hardware most likely works internally, otherwise you'll end up with a horrible mess that's 110% hacks that you'll need to rewrite away from scratch later because you made all the wrong assumptions =D