What's New? 2.2.3

Released -- 28 July 2016

The 2.2.3 release fixes a number of emulation bugs, features overclocking (for lag reduction) and Dendy mode, and adds support for a bunch of new ROM dumps (mostly unlicensed). Reverse engineering tools and Lua scripting have got some updates, new input devices are supported, new palette files have beed added. The SDL port has been fixed and updated as well.


  • Customizable overclocking
  • Dendy mode
  • Fixed rerecord counting broken outside taseditor


  • Added mappers: 29, 30, 
  • Fixed mappers: 225, 119, 4, 35, 31, 69, 212, 45, 
  • Fixed mmc5 IRQ handling
  • Fixed mmc1 reg#3 masking
  • Fixed vrc7 sound savestates
  • Added CoolBoy, KS7010, SB200, UNIF 158B, UNIF DRAGONFIGHTER, UNIF BMC-10-24-C-A1, UNIF EH8813A, UNIF HP898F, UNIF F-15, UNIF RT-01, UNIF UNL-KS7017, UNIF BMC-81-01-31-C, UNIF UNL-8-IN-1
  • NES 2.0 support
  • Fixed UNIF BMC 12 IN 1, UNIF OneBus


  • Fixed a bug with FDS flag being always set when converting a FCM


  • Prescale filter for 2x, 3x and 4x resolutions
  • Made NTSC filter internal resolution closer to 4:3


  • Support 512 color palettes
  • Added external palettes: SONY_CXA2025AS_US.pal, RP2C03.pal (and its versions), Unsaturated-V6.pal
  • Option to swap deemphasis bits


  • Option to swap duty cycles
  • NSF can be set to Dendy mode


  • Fix Mouse input implementation
  • Support for SNES mouse
  • PEC-586 russian keyboard support


  • Removed speed notification per script reload, if it remained 100%
  • Fixed lua drawings in NSF
  • Proper halo for lua font
  • Fixes to sound.get() region consistency and frequency/midikey detection for Noise and DPCM channels

New Lua functions:

  • emu.getpath()
  • emu.loadrom()
  • rom.writebyte()
  • gethash()


  • Added -dumpinput and -playinput functions
  • Support for SNES pad
  • Added onscreen messages when region changes


  • Added debuggerPageSize config variable which lets you pick whether 8KB physical PRG pages are used, or 16KB (the original). It defaults to 14 (1<<14 == 16KB).
  • Set symbolic debugger name entry dialog text limits when creating a new label
  • Fixed new-PPU debug information (address and pixel)
  • Step Into hotkey
  • More granular accounting of scanline and dot

Trace Logger

  • Fixed incorrect display of resolved address for (FF,x)

Symbolic debugging

  • Optionally display register names


  • Fix crash when attempting to open file picked as target for Save Stripped ROM operation

PPU Viewer

  • 8x16 sprite display mode

Hex Editor

  • Added option to dump entire 64k memory space
  • Don't forget to load the symbols, when hex editor is first launched before debugger
  • Show values for registers $4000-$4017


  • mmc5 Akumajou Dracula crash fix
  • More RAM available in search


  • Added apply button to video config dialog
  • Added link to libgd project download page in readme
  • Noted optional libgd dependency in readme
  • SCons: Fixed logic for LOGO and CREATE_AVI options
  • Manpage updates
  • Added hotkeys for volume up/down
  • Menu toggling with the Alt key
  • Print error when opengl/scalers are both enabled
  • Fixed bug where lua open file gui would default to home directory

Created with the Personal Edition of HelpNDoc: Benefits of a Help Authoring Tool