I have a special nes project that I am doing. I have a nes with the 10nes chip disabled, I am looking to create a dummy cart that blanks the screen to black(if thats possible). As if the nes is tuned off or just black. The reason I need to do this is because some nintendo's show red, green blue purple...etc when powered on with no cart. I need it to show black(or no signal). Any suggestions? is this possible with just electrical connections(no real chips), and without ruining the NES.
You have to control the system and write the Black color to $3F00 on the PPU. 0F and 0E are suitable colors for black. It would help to have a better idea what you are trying to do.