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Famicom Disk System


The Family Computer Disk System a.k.a. Famicom Disk System was released in Japan in 1986. It is an addon to the Famicom and used floppy disks.

Emulator Rom Folder Extension BIOS Controller Config
lr-fceumm fds .7z .fds .nes .zip disksys.rom /opt/retropie/configs/nes/retroarch.cfg
lr-nestopia fds .7z .fds .nes .zip disksys.rom and
NstDatabase.xml (already exist in /opt/retropie/libretrocores/lr-nestopia folder)

Emulators: lr-nestopia, lr-fceumm


Accepted File Extensions: .7z .fds .nes .zip

Place your FDS Roms in



FDS games require the disksys.rom bios file.

Place the BIOS in

Recognized Name No-Intro Name md5sum CRC32
disksys.rom [BIOS] Family Computer Disk System (Japan) (Rev 1) ca30b50f880eb660a320674ed365ef7a 5e607dcf


Both emulators utilise Retroarch configurations

*Side Note: In order to "switch to side B" of a ROM most controllers have this set to a default of the upper right bumper or right trigger button

Add custom retroarch controls to the retroarch.cfg file in


For more information on custom RetroArch controls see: RetroArch Configuration