So I finally reprogrammed my first nes cart. I used a MMC3 (SMB 3)as a donor cart and some plcc32 AM29f040b chips for PRG and CHR. I works fine, as I already tested a lot of games on it including Werewolf, Contra Force, Operation C, Bram Stocker's Dracula, Sword Master, Shatterhand etc. All worked very well except for the fact that I'm getting some glitchy graphics. I rewired the chips using documentation from Romlab and from here http://callanbrown.com/index.php/advanc ... production . I verified the connections and they are made according to the documentations, so I don't know what is causing this glitches to appear. Can anyone tell me please what could it be? I'm attaching some pix i made while playing werewolf and contra force. Thank you much!