Do you still own a working FDS RAM Adapter? Let us know in the comments—and tell us if you’ve ever had to replace its belt drive!
For enthusiasts using emulators like , FCEUX , or Nestopia , the FDS BIOS is a "system file" rather than a game file. Because it contains proprietary Nintendo code, it is not bundled with emulators and must be provided by the user to: Enable the Disk System interface. -BIOS- NINTENDO FAMICOM DISK SYSTEM ROM
Nintendo never sold the FDS BIOS separately. The only legal way to obtain it is to dump it from your own using a retrode, dumper cart, or an Arduino-based FDS stick. Do you still own a working FDS RAM Adapter