nesdev.org

A lot of your changes (dual ported VRAM, tile priority, cutout window, parallax scrolling, scroll splits, etc.) sound like features of the Game Boy Advance video hardware. So why not just take a GBA motherboard and run its video output through a video encoder that feeds 8x1 pixel slivers in red, gr...

It seems that you can't really feed individual pixels to the PPU without modifying the NES. :( I did think about some ideas for a mapper to enhance the graphical abilities of the NES. Every 8x8 pixels would have its own attributes, similar to the MMC5. But unlike the MMC5, these extra attributes wou...

I read that Just Breed uses $5800 in the MMC5. But there doesn't seem to be any documented info about this register I can find. Does anybody know what $5800 in the MMC5 is used for? Could anyone possibly use a CopyNES with a copy of Just Breed to help find out what $5800 does?

Maybe if there's a way to take over the CPU bus and write to the PPU registers (when phase2 clock is low, would that be possible?). I don't think it would be possible for hardware to update the PPU registers quickly enough. The CPU R/W signal is output only, so I don't think hardware inside the car...

I read that if PPU rendering was off, the palette address chosen by $2006 would determine the color to be rendered on screen, and the color could be changed on screen by $2007. Would it be possible to do something similar, with PPU rendering and $2006 set to a palette address, and have hardware insi...