nesdev.org

Oh.... OOOOH. And so it dawned upon me.
I guess....

So mappers aren't just fancy ways to mirror your memory but also to extend it. And the PRG RAM addresses are basically just "convention" and I could put my stuff anywhere?

Basically ;). Anyway I think I came up with a feasible (but not universal) solution. Basic setup: PRG ROM, PRG RAM, CHR RAM, BLE IC, some transistors. The transistors are put on the RAM Datalines, the IC can turn them on/off. In my NES code I will query an reservered adress in RAM, if that address r...

Thanks for both your answers! Looks like I got some homework to do. I'll try to concentrate on the RAM problem for now. FPGA is an option though I've done very little with these... Just one more clarification question: Isn't the PRG RAM (battery backed RAM) only accessed when I do a read/write in th...

Thanks for the elaborate answer! Really appreciated. 500mA is plenty. I guess i'll be around the 30-40mA range (for the IC alone) so theres plenty of padding. By "PRG RAM" do you mean "extra RAM on the cartridge for the CPU's use"? Just the usual address lines, except that you do...

Hello there. I've been crawling through google and some of the wiki but I'm either blind or some info is just not there :). (It's not exactly the most common asked questions so yeah..). I will, hopefully, at some point in the future create my own small NES game and a corresponding cartridge. In the ...