Alright, I have just about had it with my Sega Teradrive because due to its slow CPU (AMD N80L286-10/S 10Mhz) I can't play some of my favorite DOS games (Sloooow) . Dammit if I have it, I want to play it . I've been having good luck removing and installing smd chips lately, and I'm thinking of replacing the current CPU for the faster N80L286-16/S as it appears to be a good drop in replacement. So for those that have more experience I want to ask, all I have to do is substitute the actual CPU and clock ocillator correct? or is there more to it?. Here's a Teradrive motherboard photo near the CPU and OSC : http://nemesis.hacking-cult.org/MegaDrive/TeraDrive/Pictures/IMG_0844.JPG Here are some more great Teradrive pics (Thanks to our very own Nemesis) : http://nemesis.hacking-cult.org/MegaDrive/TeraDrive/Pictures/ Any help is much appreciated! Thanks!