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Core info
License GPLv2
Extensions nes, fds

Nestopia is a Nintendo Entertainment System video game system emulator that can be used as a libretro core.


Nestopia is a portable and cycle-accurate NES/Famicom emulator written in C++. Nestopia UE (Undead Edition) is a fork of the original source code, with enhancements from members of the emulation community. This includes support for new platforms, and bug fixes in the emulator core.

Feature Support

These are libretro features, not frontend or standalone emulator features.

Saves Save states Rewind Netplay Cheats Controllers API Rumble Multi-mouse Sensors Camera Location Subsystem API


Nestopia requires the following BIOS image files for operation:

  • NstDatabase.xml (NES Database)
  • DISKSYS.ROM (Famicom Disk System BIOS)


This core has a few options that can be tweaked from the core options menu. The default setting is highlighted and in italics:

  • nestopia_blargg_ntsc_filter (disabled/composite/svideo/rgb)(restart): Enable Blargg NTSC filters.
  • nestopia_palette (consumer/canonical/alternative/rgb/raw/custom)(restart): Choose which color palette is going to be used.
note: To use a custom palette, place custom.pal in the Retroarch system directory
  • nestopia_nospritelimit (disabled/enabled)(restart): Removes 8-sprites-per-scanline hardware limit.
  • nestopia_fds_auto_insert (enabled/disabled): Automatically insert first FDS disk on reset.
  • nestopia_overscan_v (enabled/disabled): Mask Overscan (Vertical).
  • nestopia_overscan_h (disabled/enabled): Mask Overscan (Horizontal).
  • nestopia_favored_system (auto/ntsc/pal/famicom/dendy): Favored System.


RetroPad NES Joypad
Retro Dpad.png SNES Dpad.png
Retro Y Round.png
Retro X Round.png
Retro B Round.png NES B.png
Retro A Round.png NES A.png
Retro L1.png
Retro R1.png
Retro R2.png
Retro R2.png
Retro Left Stick.png
Retro Right Stick.png
Retro L3.png
Retro R3.png
Retro Select.png SNES Select.png
Retro Start.png SNES Start.png

Compatibility List/General Issues

Main article: [1]

External Links