@neauoire thank you! I’ve been using a chibicc fork to make some really small ROMs which has been really helpful. I’m really new at FPGA stuff so im not sure if im going about things in the best way (or even a good way 😅 ), but I’m so excited to see things working a little bit! At this point all the opcodes should be working except for a lot of stuff in DEI and DEO, which is encouraging. I’ll probably push up the fill mode changes tonight once I can clean it up some more!