nesdev.org

You're right, and I did the same in my project, active REFRESH signal disable CPU core and DMA, only delay counter I have one (common for DMA and 65c816). I'll rewrite the code DMA/HDMA. 2. [if DMA]          if DMA      delay counter = 0 then step the DMA engine;  increment the DMA      delay counte...

I create a SNES on FPGA. And now I tested several small games with simple LoROM mapper (Dr.Mario, Super Mario World 1, Tetris Attack, Battletoads, Tom and Jerry, Daffy Duck, Sim Sity). All tested games works well. But one game (Sim Sity) works with damaged sprites (and backgrounds, and objects). I f...