GrndMstr
New member
Hello all. I am restoring a Plachoice 10. I have a few boards that have bad mask rom chips. Either the graphics are corrupt (bad U1) or the titles display until selected. The system then refreshes and that game is gone (bad U2). My question is: can I replace a mask rom with an eprom chip? I see lots of people that can burn games onto eproms but no one says anything about mask roms. I am not looking to swap the games out with different games. I just want a functional copy. I have taken the roms out and reset them to make sure it wasn't something simple like a loose chip. I am assuming the PCB is good because the system will display info or corrupted graphics. Interchangeable chips would make this an easy fix. The board I am looking to repair is my Super Mario Bros 3. There are others but this is my first priority. All the pictures I see lead me to believe that they are interchangeable. The PCB's look identical. Any thoughts or know how on this would be great.
Thank you in advance
Thank you in advance
