Mesen

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Debugger: Tons of new features, UI improvements, performance improvements and bug fixes.
• HD Packs: New features, performance improvements and bug fixes.
• FDS: Improved compatibility of the automatic disk insertion feature.
• UI: Added a few minor options (and increased the number of savestate slots to 10).

Bug Fixes

• Input: Changed input polling timing to reduce input lag by 1 frame.
• Linux: Improved SDL error handling to prevent crashes.
• Accuracy: Fixed a mirroring issue with mapper 30 games.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Input: Added support for 20 more peripherals (including controllers, barcode readers, keyboards, mice, external storage devices, etc.)
• Video: Added a 60.0 FPS mode to reduce dropped frames
• Video: Added support for exclusive fullscreen mode (Windows only)
• Video: Added option to rotate the display (for homebrew games)
• Performance: Minor performance enhancements on Windows (~5%) and large gains on Linux by enabling LTO (25-30%)
• Movies: Rewrote movie file format from scratch to be a lot more flexible, and editable by hand. (Old .mmo files are no longer supported)
• Debugger: Several enhancements and a number of additions/changes to the Lua API.
• Accuracy: Improved FDS IRQ emulation

Bug Fixes

• General: Several miscellaneous bugs have been fixed.
• Debugger: A large number of small bugs and usability issues have been fixed.
• HD Packs: Fixed performance issues with HD Packs in CHR RAM games (over 2x faster)

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• UI: All UI shortcuts are now customizable in the Preferences (multi-key shortcuts are now supported).
• UI: Added a link to the new online documentation site in the Help menu.

Bug Fixes

• Cheats: Fixed crash when cheats window was opened
• HD Packs: Fixed sprite recording in HD Pack Builder and crashes when loading HD packs in some conditions.
• Debugger: Fixed some minor bugs.
• Linux: Fixed some crashes and layout fixes.
• Dendy: Fixed regression bug with intensify color and grayscale bits emulation.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• UI: Added an initial setup dialog for new users.
• UI: Ability to configure paths and portable mode in preferences.
• HD Packs: New features, bug fixes and audio replacement support.
• Input: Added support for the Famicom's second controller's microphone.
• Savestates: Added ability to save/load the state to/from any file.
• Debugger: Added Lua scripting.
• Debugger: Assembler now has syntax highlighting.
• Debugger: Integration with ASM6 via freem's fork (ASM6f) to import labels and code comments.
• Debugger: Added iNES header editor
• Debugger: PPU viewer enhancements
• Debugger: Added "Developer mode" option for quicker access to debugging tools
• NSF: Added repeat and shuffle options
• General: Improved emulator startup performance

Bug Fixes

• UI: Fixed window size not being remembered correctly in some cases
• FDS: Bug fixes related to cheats and save data
• Debugger: Fixed watch window usability issues and assembler bugs

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• HD Packs: Improved support for HDNes' HD packs and added an HD Pack Builder tool.
• Debugger: Added several new features and options (Step Back, configure input, etc.)
• Video: Added option to automatically re-enable sprite limit to reduce graphical glitches caused by the "remove sprite limit" option.
• VS System: The custom color palette can now be applied to VS System games as well.

Bug Fixes

• Overclocking: Bug fixes and improved compatibility.
• Cheats: Fixed issue with 8-character Game Genie codes.
• FDS: Fixed a crash, an issue with automatic disk insertion and improved emulation compatibility.
• NSF: Fixed issue with MMC5 multiplication register (fixes Just Breed NSF).
• Others fixes and improvements for the debugger, game selection screen, rewinding, mappers 48/163, a number of unlicensed games and more.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Rewind: Added a rewind functionality with reverse video and audio playback (up to several hours worth of gameplay can be rewinded.)
• UI: Added game selection screen
• Compatibility: Added support for mappers 29, 30, 111, 158 and 174.
• FDS: Added option to automatically switch disks.
• Video: Improvements to video scale management and corrected aspect ratio presets.
• Misc: Added a few other small features (Frame counter, game timer, 96kHz audio, etc.)

Bug Fixes

• Accuracy: Improvements to PPU, MMC5 and VRC6 emulation.
• FDS: Fixed issue with sound emulation (Fixes Bio Miracle).
• Overclocking: Improved compatibility with some games.
• Debugger: Fixed a number of bugs and crashes.
• Misc: Several other bug fixes.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Performance: Code improvements have increased emulation speed by 15-35%.
• Audio: Added a customizable equalizer.
• Patches: Added support for UPS and BPS patch formats.
• Compatibility: Added support for UNIF FK23C/FK23CA/D1038 boards and mapper 104.
• PPU: Added option to emulate OAM RAM decay.

Bug Fixes

• PAL: Improved PPU emulation accuracy.
• MMC5: Improved emulation accuracy.
• FDS: Improved IRQ emulation accuracy (fixes Lutter and some unlicensed games).
• Emulation: Fixed problem that caused in-game crashes in the "Legend of Link" romhack.
• Misc: Several small bug fixes.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Emulation: Added several new options to enable/disable model-specific quirks.
• Command line: Added command line options for most video/audio/emulation settings.
• Debugger: Added several new features (Hex editor, TBL file support, code editor, graphic editor, and a lot more), improved performance and fixed some bugs.
• Games: Headerless roms can now be loaded (if they are found in the built-in game database).

Bug Fixes

• Emulation: Improved accuracy of $2006 write behavior (solves minor issues in 2 games).
• Emulation: Improved accuracy of $2004 read behavior.
• Emulation: Improved accuracy of sprite overflow bug emulation.
• Misc: Several small bug fixes.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Video: Added new custom aspect ratio option.
• Compatibility: Added support for mapper 190 (Magic Kid GooGoo) and UNIF board EH8813A.
• Video: Added new codec for AVI recording (camstudio) and compression setting

Bug Fixes

• FME7: Fixed bug with savestates for mapper 69.
• Misc: Several small bug fixes.

Happy new year!

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Video: Added new NTSC filter (based on Bisqwit's work).
• Video: Added feature to allow recording gameplay to AVI files

Bug Fixes

• Video: Fixed graphic glitches and crashes with the 2xSai, Super2xSai and SuperEagle filters.
• Startup: Fixed crash that occurred when the path contained non-ascii characters (bug introduced in 0.6.1).
• Linux: Fixed an issue with the "only allow one instance of Mesen" option.

Happy holidays!

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Linux: Mesen can now run under Linux (requires Mono and SDL2). This is still a work in progress and may contain bugs and crashes.
• UI: Mesen is now available in Portuguese (translation by ThallesAps)

Bug Fixes

• Audio: Improved square channel accuracy and fixed a sound mixing bug introduced in 0.6.0.
• Misc: Fixed issues with DirectInput controllers and the debugger.
• Overclocking: Fixed issues when using overclocking in games that use the DMC channel.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Debugger: Tons of new features and improvements (including labels and comments, a profiler, more options in the PPU viewer, etc.)
• Audio: Greatly reduced sound latency.
• Audio: Added an option to reduce the popping sounds produced by the DMC channel in some games.
• Audio: Added channel panning options.
• Audio: Added a crossfeed option.
• Video: Added 2 new palette presets (Nostalgia and Nes Classic, by FirebrandX).
• UI: Added a "power cycle" option to reload the current game.
• UI: Added an option to load a random game.

Bug Fixes

• Video: Fixed a bug with the "Remove Sprite Limit" option that could cause it to display incorrect sprites on the screen.
• Video: Fixed a bug with the aspect ratio option when overscan was used at the same time.
• NSF: Fixed a crash that could occur when loading incorrect NSF files.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Compatibility: Added support for 4 new mappers (43, 54, 125, 236)
• Compatibility: Added support for 40 new UNIF boards.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Compatibility: Added support for 6 new mappers (83, 126, 199, 215, 217, 220)
• UNIF: Added support for CoolBoy boards.
• Video: Added a few options in the advanced tab.

Bug Fixes

• Accuracy: Improved IRQ timing for FDS emulation - fixes "Druid - Kyoufu no Tobira".
• Accuracy: Fixed issues with mapper 245 games.
• Debugger: Various bugfixes.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

Bug Fixes

• Google Drive: Fixed a crash that could occur when enabling Google Drive integration.
• Debugger: Fixed a crash introduced in 0.5.0 that could occur when opening the debugger.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Input: Added key presets for typical keyboard layouts and controllers (Xbox, PS4, etc.)
• Input: Several emulator functions can now be mapped to controller buttons (e.g: fast forward, save state, etc.)
• Save states: Added automatic save state option.
• UI: Mesen is now available in Ukrainian.　(translation by Arcus87)
• Debugger: Added cpu/ppu mapping display and improved several features (Memory Viewer, Trace Logger, CHR Viewer).
• Compatibility: Added support for 3 new mappers (123, 134, 216)

Bug Fixes

• Crash: Fixed a crash that could occur when exiting Mesen.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Game DB: Updated game database to use the latest version of NesCartDB.

Bug Fixes

• NetPlay: Fixed a crash introduced in 0.4.2 that occurred when connecting to a server.
• Gameplay: Screensavers will no longer turn on while playing games with a DirectInput controller.
• Cheats: Fixed an issue that could occur when importing some CHT cheat files.
• Cheats: Fixed issues that could occur when applying large numbers of cheats.

WARNING: Save states created with previous versions will no longer work in 0.4.2.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• UNIF: Added support for UNIF files.
• Cheats: Added a built-in cheat database containing cheats for over 750 games.
• Cheats: Cheat window has been reworked and added support for FCEUX (.CHT) and Nestopia (.XML) cheat file formats.
• Compatibility: Added support for 7 new mappers (105, 106, 117, 162, 186, 196, 219)

Bug Fixes

• IPS: Fixed a number of issues with IPS files.
• Accuracy: Improved IRQ timing for RAMBO-1 chip (Mapper 64) - improves Skulls and Crossbones.
• Accuracy: Fixed issues with Gradius II, Crisis Force and Cosmo Police Galivan.
• NSF: Fixed sound tempo in Dendy mode.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Compatibility: Added support for 18 new mappers (114, 120, 121, 136, 168, 183, 188, 204, 213, 214, 222, 229, 233, 238, 244, 253, 254, 255)
• Compatibility: Improved support for NES 2.0 headers.
• Input: Added support for the Oeka Kids Tablet.
• MMC1: Fixed issues with some games and added support for RAM read/write protection.
• MMC3: Added support for ram read/write protection.

Bug Fixes

• Audio: Fixed a bug in the square channel's sweep units - fixes audio distortion in some games.
• Input: Fixed limitations with keyboard input and fixed an issue with XInput controllers.
• Cheats: The "Delete Selected Cheats" button now works.
• Video: Loading a game while in fullscreen mode no longer resets the video scale.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Compatibility: Added support for 26 new mappers (14, 35, 36, 41, 51, 53, 63, 90, 96, 103, 108, 165, 166, 167, 178, 187, 197, 209, 211, 212, 221, 234, 235, 245, 249, 250)
• UI: Mesen is now available in Russian (translation by Matich)
• UI: Mesen is now available in Spanish (translation by Juan Ramón Martínez)
• Input: Added option to display controller input on the screen.
• Audio: Added option to reduce popping sounds produced by the triangle channel in some games.

Bug Fixes

• DirectX: Fixed a crash that occurred when loading a ROM on some computers.
• NSF: Fixed a crash when attempting to take screenshots and improved the silence detection code.
• CNROM (Mapper 3): Enable bus conflicts for standard CNROM boards (fixes Cybernoid - The Fighting Machine)

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Compatibility: Added support for 20 new mappers (28, 31, 40, 42, 46, 48, 50, 56, 132, 133, 142, 170, 171, 172, 173, 175, 177, 179, 182, 252)
• Input: DirectInput controllers/joysticks (e.g: PS4 controller, etc.) are now supported.
• Overclocking: Added a lag counter like the one present in FCEUX and puNES.
• Sunsoft 4: Improved compatibility for this mapper.

Bug Fixes

• Audio: Fixed a bug in the square channel's sweep units - fixes audio distortion in some games.
• Open Bus: Improved open bus implementation.
• VS System: Fixed a palette bug that could occur after loading VS System games.
• VRC4: Fixed a bug that was causing TMNT2 (J) to crash.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• VRC7: Added VRC7 audio support.
• MMC5: Added vertical split mode support.
• Game DB: Automatically select appropriate controllers when loading a recognized game.
• VS System: Improved default settings for all games (fixes palette and input mapping issues).

Bug Fixes

• Preferences: Options in the Advanced tab are now visible again.
• VS System: Fixed a bug that prevented Gumshoe from booting.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• NSF: Added support for NSF and NSFe sound files.
• Compatibility: Added support for 24 new mappers (6, 8, 16, 17, 86, 137, 138, 139, 141, 143, 144, 150, 151, 153, 155, 156, 157, 159, 164, 176, 218, 227, 228, 243)
• Game DB: Added a built-in game DB to automatically fix incorrect iNES headers.
• Archives: Added support for 7-Zip (7z) files and support for archives (zip/7z) containing multiple roms.
• Tools: Added a log window tool (Tools menu)

Bug Fixes

• VS System: Fixed freezes in TKO Boxing, RBI Baseball and Super Devious.
• Debugger: Various bugfixes and a few improvements.

WARNING: Save states created with previous versions will no longer work in 0.2.2.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Overclocking: It is now possible to overclock (and underclock) the CPU.
• Compatibility: Added support for Namco 163/175/340 (Mapper 19 and 210)
• Compatibility: Added support for Sunsoft FME-7/5A/5B (Mapper 69)
• Audio: Added expansion audio support for MMC5, Namco 163, Sunsoft 5B and VRC6.

Bug Fixes

• MMC5: Fixed a regression introduced in 0.2.1 that broke Just Breed.

WARNING: Save states created with previous versions will no longer work in 0.2.1.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Audio: Added the ability to record sound to WAV files.
• NES 2.0: Added support for multiple submappers.
• Debugger: Added a number of new features.

Bug Fixes

• Accuracy: Improved PPU accuracy - fixes Kick Master.
• Accuracy: Improved IRQ timing for RAMBO-1 chip (Mapper 64) - fixes Hard Drivin' and Skulls and Crossbones.
• Audio: Fixed a bug with low frequencies on the triangle channel.
• Audio: Fixed sound issues when using low volume levels in the sound mixer.
• PAL/Dendy: Fixed timing issues with the PPU.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Cloud Saves: Added Google Drive integration - allows backup of save data and syncing across multiple computers.
• Video: Added multiple video filters (xBRZ, Scale2x, HQX, 2xSai, Super2xSai, SuperEagle).
• Video: Added configuration for brightness, contrast, saturation and hue.
• Video: Added configuration options for the NTSC filter.
• Video: Added palette presets and option to export palette to .PAL file.

Bug Fixes

• Crash: Fixed a crash that could occur on some systems during gameplay.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Compatibility: Added support for mapper 15 and 60.

Bug Fixes

• Audio/Video: Improved emulation accuracy.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

Bug Fixes

• Startup: Fixed a number of bugs that could crash the application on startup.

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• UI: Mesen is now available in English, French and Japanese.
• Compatibility: Added basic support for VS Unisystem games. (Mapper 99)
• Compatibility: Added support for mapper 82 and 241.
• Audio: Added customizable fake stereo effects.
• Audio: Added option to swap Square 1 and Square 2's duty cycles.

Bug Fixes

• Auto-updates: Fixed bug that caused auto-updates to fail (MesenUpdater.exe was missing)

This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.

New Features

• Input: Arkanoid Controller/Paddle emulation is now available - Both NES and Famicom versions.
• Debugger: The debugger is now able to disassemble and display instructions that are executed from CPU RAM or Cartridge RAM.

Bug Fixes

• NetPlay: Fixed connection bugs - Clients should now be able to connect to a netplay server.
• Input: Fixed issue with standard controllers not working correctly in a very specific case.
• Timing: (Probably) Fixed timing issue with Battletoads which caused freezes on level 2.
• Debugger: Fixed a number of usability issues with the 'watch' list.

Initial release.
This release is a beta - save states, movies, etc. created with this version may not be compatible with future versions of Mesen.