Okay, Thank you all I need is to know how to fix the header for the fds file

I'm still trying to find a Super Mario Bros. .fds file and getting no luck. every time I load it in my powerpak it says bad file header

Okay, Thank you all for helping. I'll see what I can do.

Should the FDS Bios be a .bin or a .fds or a .nes or what?

when I open the bios rom that's when it says "Please set disk card" When I open the .fds file it still says bad file header

okay, so i tryed it and it half worked I think. It loads up the "Nintendo please insert disk card" but i still can't play any games

okay, ill try it. thanks

When I try to load a .fds file it says "Bad file header"

okay, thank you, does anyone have the correct mapper?

How do you play a .fds file on a powerpak for the NES?