I recently purchased a used "High Definition Graphics" model 1 Genesis and a Game Genie. The problem is, I can't get the Game Genie to work. I can get the code screen to pop up just fine, but once I put in the code(s) and press start, the game loads up, but the codes don't work. If I reset the game, it takes me back to the code screen, with the codes still intact, but modified (several letters and numbers changed). [Edit: If I put codes into any other line besides the first one they don't show up at all when I reset.] The only games I've been able to try this with so far are Mortal Kombat and Altered Beast, as the only other Genesis game I have at the moment is the 6-Pak, and I don't know of any codes for that one. I recently ran into the same problem when I tried to use a SNES Game Genie with a model 2 SNES (or baby SNES as I like to call it) and figured out that the model 2 SNES must have some kind of lockout chip that keeps the Genie from working. Would this be the case with the model 1 Genny? If so, is there some kind of mod that would fix this? Any help would be much appreciated. Thanks in advance.