The 2.1 is a major new release that incorporates new mappers and mapper fixes from FCEU-mm. In addition it offers a multitude of bug fixes, and feature enhancements to both the Win32 and SDL ports.

Major Bug / Crash Bug Fixes

*Fixed throttling problems that resulted on AMD Dualcore processors. (Caused FCEUX to appear to be in turbo mode).
*Fix major crash issue where NROM game (such as SMB) savestates were writing erroneous information if a non NROM game was loaded prior.
*Fixed a bug that caused a new sav file to not get created when loading a 2nd battery backed game.
*Fix Directory Overrides so to allow users to have no override. Also fixes directory override reset bug.

Minor Bug fixes

*Hotkeys - prevent "Hotkey explosion" where some laptop keys set off all unassigned hotkeys
*Timing - "disable throttling when sound is off" now only affects FCEUX when sound is off
*Clip Left and Right sides taken into account when drawing on screen (record/play/pause, lag & frame counters, messages, etc)
*Fixed bug where having sound off and Mute turbo caused chirps when toggling
*Video settings - fixed bug when both aspect ratio correction and special scaling 3x are set, video was getting resized incorrectly
*Auto-save cleanup -prevent loading an auto-save from previous session. Added flags for enabling auto-save menu item.
*Fixed issues related to big endian compiling.
*Fix bug so that Escape can now be assigned as a hotkey
*Fixed bug in screenshot numbering that caused numbering to not reset when changing games.

SDL
*SDL Movie subtitle support and subtitle toggle hotkey added.
*SDL Added fcm to fm2 converter tool to SDL version.
*SDL Improved the SDL sound code; drastically improves quality of sound.
*SDL Savestate slots are now mappable.
*SDL Major updates to SDL documentation
*SDL Added Shift+M for toggling automatic movie backups.
*SDL Added option to mute FCEUX for avi capturing, check the documentation for more details.
*SDL Added --noconfig command line option
*SDL Frame Advance Skip Lag frames toggle implemented

New Features Win32

*The latest mappers and mapper fixes from FCEU-mm. Adds support for many new games such as Warioland II (Unl), Shu Qi Yu, and Street Dance
*Full screen mode fixed! Also, Alt+Enter properly toggles full screen.
*Individual control for sound channels! (See sound config for details).
*Undo/Redo Savestate/Loadstate features installed! No more loss of data to unintentional presses. (See getting started for details).
*Movie subtitles can now be included in .fm2 files. See .fm2 documentation for details and Movie options for details on customizing.
*Auto-backup for movie files. (See movie options for details).
*A Ram change monitor for the Memory watch dialog. (see memwatch for details).
*Frame counter works even without a movie loaded.
*AVI Directory Override option.

GUI / Menu Enhancements

*A right-click context menu added! Includes many commonly used items for a variety of situations.
*Menu items that are hotkey mappable now show their current hotkey mapping
*Major overhaul to the Menu organization.
*All FCEUX features are now accessible in the menu
*Alt Menu Shortcuts properly configured
*Menu items are properly grayed when not useable
*All movie related menu items moved to a Movie options dialog
*Removed hard-coded Accel keys and replaced with re-mappable hotkeys (Open & Close ROM)
*Drag & Drop for .fm2 and .lua files
*Many new functions added to the context menu (See context menu for details)
*New Mappable Hotkeys: Open Cheats, Open ROM, Close ROM, Undo/Redo savestate, Toggle Movie Subtitles

Lua

*Added input.get() ! Returns the mouse info and all keyboard buttons pressed by the user.
*Fixed joypad.set(). False now sets a button to off. Nil does not affect the button at all (allowing the user to still control it).
*gui.text() Increased height (to approx. 7 lines).
*speedmode("turbo") now turns on turbo (which employs frame-skipping) rather than max speed.
*memory.readbyte will recognize frozen addresses (cheats).
*movie.framecount() always return a number, even when no movie is playing (since the frame counter is implemented without a movie loaded).
*Added FCEU.poweron()
*Added FCEU.softreset()
*Added FCEU.lagged()
*Added FCEU.lagcount()
*Added FCEU.getreadonly()
*Added FCEU.setreadonly()
*Added FCEU.fceu_setrenderplanes(sprites, background)
*Added movie.active()
*Added movie.rerecordcount()
*Added movie.length()
*Added movie.getname()
*Added movie.playbeginning()
*Added -lua command line argment, loads a Lua script on startup
*Added zapper.read() - returns the zapper (mouse) data. (Currently does return zapper data in movie playback).
*Added joypad.write and joypad.get for naming consistency.
*Added rom.readbyte()
*Added rom.readbytesigned()

Sound Config

*Turning sound off disabled sound config controls
*Re-enabled sound buffer time slider control

Hex Editor

*Freezing ram addresses automatically updates the Cheats dialog if it is open.
* Added prevention from freezing more than 256 addresses at once (doing so caused crash bugs).
*Dialog remembers window size.
*Dump Rom & Dump PPU to file Dialogs use ROM to build default filename
*Maximize and minimize buttons added.
*Help menu item added

Memory Watch

*Dialog now includes Ram change monitoring. (see memwatch for details).
*Dialog is now collapsible to 1 column.
*No longer crashes when attempting to load an invalid file from the recent file menu.
*Cancel option added to the save changes dialog.
*Memory address values that are frozen by the debugger or hex editor are displayed in blue.
*Fixed bug that caused dialog to "disappear" due to saving -32000 as its window position.
*Save as dialog uses ROM name to build a default memory watch filename if there was no last used memory watch filename
*Drag and drop for .txt (memory watch) files.
*Minor menu and hotkey fixes.
*Watch values now compatible with custom windows dialog colors.

Debugger

*Shows scanlines and PPU pixel values
*Shows scanlines even while in VBlank
*Added a Run Line button (runs 1 scanline per click)
*Run 128 Lines button (runs 128 scanlines per click)
*Number of active cheats listed.
*Cheats list automatically updated if ram addresses are frozen in the hex editor.
*Fixed bug that caused dialog to "disappear" due to saving -32000 as its window position.
*Debugger now has a minimum valid size
*Added "Restore original window size" button

PPU Viewer

*Default refresh value set to 15
*Refresh value stored in the .cfg file

Nametable Viewer

*Default refresh value set to 15
*Refresh value stored in the .cfg file

Trace Logger

*Fixed bug where user can´t scroll the log window while it is auto-updating.
*Changed message about F2 pause (left over from FCEUXDSP) to display the current hotkey mapping.

Text Hooker

*Saving a .tht file no longer crashes
*Dialog updates every frame
*Initialization error checking reinstalled,
*Dialog remembers window position
*Fixed bug where canceling save as produces an error message.
*Save As produces default filename based on the current ROM

Message Log

*Remembers X,Y position
*Resized width and height
*Allowed more lines of text to appear on the screen at once.

Metadata

*Remembers window position
*Can be called from the context menu if a movie is loaded (see context menu for details).

TASEdit

*added help menu item
*disabled menu items that are not currently implemented.

Turbo
*Turbo now employs frame skip, greatly increasing its speed
*The mute turbo option completely bypasses sound processing (another big speed boost)
*Turbo now works with the Lazy wait for VBlank sync setting


-- adelikat