Very, very cool. Good job! I remember tackling emulating the 6502 was a crazy learning experience, but I did that in C++, but definitely there is value in emulating something this complex in C#. Did you choose emulation because it was interesting or it just seemed to provide the best learning environment for what you were looking for? And have you ever dabbled in PSP emulation? I tried my hands years ago and still have a PSP sitting around with some homebrew I made.