I found this glitch that I've been able to pull off on Bizhawk and jzintv emulators. It involves pushing any button to start the game, followed by the pause code (buttons 1+9) exactly two frames after letting go of that start button, and then unpausing the game. The result is a completely messed up set of graphics that will persist until you reset the game (see image 1 for input string and the result if successful).
The glitch seems to work with every game, but AD&D Cloudy Mountain is the only one I've found to have a potential use for it. When entering a mountain, the entire cave network is already visible, including items and ladders! (see image 2, note that I haven't moved; a quiver of arrows to the left can already be seen) I'm currently doing speedruns of the game, and being able to see things like this would significantly reduce the amount of guesswork involved in getting a fast time.
My question to you guys is can any of you replicate this on a real console? I must've tried hundreds of times on my INTV III, but have had no luck. Is it possible this might only work on model I or II, or is it just a glitch exclusive to emulated ROMs?
Edited by TheWinslinator, Tue Feb 6, 2018 4:16 PM.