About This File
FCEUX is a Nintendo Entertainment System (NES), Famicom, and Famicom Disk System (FDS) emulator. It supports both PAL (European) and NTSC (USA/JPN) modes. It supports both Windows and SDL versions for cross compatibility.
The FCEUX concept is that of an "all in one" emulator that offers accurate emulation and the best options for both casual play and a variety of more advanced emulator functions. For pro users, FCEUX offers tools for debugging, rom-hacking, map making, Tool-assisted movies, and Lua scripting
FCEUX is an evolution of the original FCE Ultra emulator. Over time FCE Ultra had separated into many distinct branches.
The concept behind FCEUX is to merge elements from FCEU Ultra, FCEU rerecording, FCEUXD, FCEUXDSP, FCEUXDSP CE, and FCEU-mm into a single branch of FCEU.
As the X implies, it is an all-encompassing version of the FCEU emulator that provides the best of all worlds for the general player, the ROM-hacking community, and the Tool-Assisted Speedrun Community.
What's New in Version 2.2.2 See changelog
Released
- The 2.2.2 release fixes a number of emulation bugs and adds many new features, most of which are related to debugging and reverse engineering.
- Common
- Properly savestate NSF files
- "Auto-resume old play session" now also works with NSFs
- Emulation
- Fixed mappers 178, 28, 53, 154, 43, 253, 19, 2
- Mapper 012 - added hardware dip for language select
- UNIF PEC-586 - fixed render, added 512K cartridges suppport
- Fixed UNIF 8157, UNIF T-262, UNIF DANCE2000
- Palette RAM reading fix for Old PPU
- Bring some improvements to New PPU from BizHawk, fix vtoggle5/6 back to vtoggle
- Fixed mmc5 savestates
- Lua
- Fix wrong frequency calculation in sound.get() function
- New Lua functions:
- tobitstring()
- memory.readword()
- memory.readwordsigned()
- debugger.hitbreakpoint()
- debugger.getcyclescount()
- debugger.getinstructionscount()
- debugger.resetcyclescount()
- debugger.resetinstructionscount()
- New scripts:
- JumpingFCEUXWindow.lua
- Win32
- Added "Square pixels" option to Video Config
- "TV Aspect" ratio can be customized, by default it's 4:3
- Changed "Disable hardware acceleration" checkbox to a drop-down list with 3 options
- Movie recording: remember last Author name when creating a new movie
- Movie recording: added ability to record "Insert coin" command (for VS games)
- When no script is currently running, Shift+L loads the most recent Lua script
- Dynamic link to lua51.dll instead of static linking, because some external libraries might crash without lua51.dll
- Updated 7z.dll to v9.22
- A couple of fixes which deal with "multiple ROMs in a single archive" case
- Auto-disable "Game Genie ROM" feature when no "gg.rom" file is found
- Fixed "Single Instance Mode"
- TAS Editor
- Comply with Lua movie.rerecordcounting() setting
- Fixed workflow with "Auto-adjust Input according to Lag" disabled
- Debugger
- Smart scrolling up/down by whole instructions - ported from an obscure version of FCEUXD 1.1
- Scrolling maintains relative position of the ">" pointer inside the Disassembly window
- Highlight PC pointer line when a breakpoint is hit
- debuggerFontSize can be specified in fceux.cfg
- Fixed storing and loading .deb files when working with archived ROMs
- Fixed Cycles counter reset when loading an earlier savestate
- Added Symbolic Debug naming by right-clicking any address or name
- Symbolic names behave the same way as usual addresses
- Newly created Bookmarks inherit existing symbolic name by default
- Added CDL data column to the left from Disassembly, to distinguish executed branches of code from not executed
- Added 'T' condition for breakpoints (it checks the bank of the accessed data, see docs)
- Trace Logger
- The dialog window can be resized
- Do not clear window log when stopping the logging
- Added "Log Cycles count" and "Log Instructions count" options
- Added Symbolic Debug naming by right-clicking any address or name
- Clicking any address select the address
- Double-clicking any address brings Debugger at the address
- Added mouse wheel support
- Only output "from $XXXX" when the subroutine was called by JSR
- PPU Viewer
- Added "Mask unused graphics" feature (needs Code/Data Logger running)
- Fixed window layout when using big fonts
- Hex Editor
- Added "Highlighting" submenu and "Highlight Activity" feature
- Added Symbolic Debug naming by right-clicking any address
- Specify Data bank condition when adding a Breakpoint by context menu
- Fixed bugs when saving files while working with ROMs in archives
- hexeditorFontSize can be specified in fceux.cfg
- RAM Search/RAM Watch
- Added "Hex Editor" button to RAM Search (right-clicking an address works as well)
- Fixed RAM Watch bug when contents of old .wch file were mixed with the newly saved data
- SDL
- "--periodicsaves" command line option
- "--4buttonexit" command line option
- "--loadstate X" and "--savestate X" command line options
- Added Unity desktop support
- Added otion to use system-provided LUA library instead of statically linked LUA
- Fix issue where battery backup save was not being saved when using "Quit" hotkey
- Fixed bug where FCEUX would take exclusive grab of input in windowed mode when resuming from pause