I'm new to romhacking and currently working on a romhack of Super Mario Bros (NES).
I'm using SMB Utility to redesign Levels. Everything is working fine so far.
In FCEUX my game runs with no problems.
Even after writing my PRG and CHR on EPROMs, placing them on a SMB donor cart and testing it in a real NES (front loader) everything is great.
But when I put my cart into my Retron 5 to play the game on my LCD TV the screen seems to be "cut vertically in half" and the background elements are out of place and appear like from nowhere.
I made a video of that because it's hard for me to explain.https://youtu.be/fAEpYsESNqk
What do you think? What is the problem.
Since the Retron is just a kind of emulator that rips the Rom temporarily from the cart to play the game I don't think that bad contacts are the reason. I also cleaned them and the games plays -as said - fine on my original NES and the .nes Rom file also plays fine in FCEUX.
This is how the game looks like in FCEUX: https://youtu.be/XcB2wOAjN0U