Crucially, the Famicom was designed to run cartridges directly. It had no native ability to read floppy disks or manage disk-based data streaming. The FDS RAM Adapter served two purposes:
That said, the BIOS is widely available online (SHA-1: e4e4759c0fa0c5be1d03bd8b87aee9b311cbe4d3 for the standard version). From a preservation standpoint, many argue that since the hardware is abandonware and not manufactured for 30+ years, downloading it is low-risk—but legally, it’s still copyrighted by Nintendo. -BIOS- NINTENDO FAMICOM DISK SYSTEM ROM