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1.62.3 / 02-02-2023





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Snes9x is a portable Super Nintendo Entertainment System emulator with high game compatibility and is a good choice if you can't run more demanding alternatives. Ports and forks of Snes9x exist for many platforms. It is also available as a libretro core for RetroArch. There also a French version available here.


Windows: XP+

Linux: 3.2+

MacOS: 10.7+ 

Most Recent Changes


This fixes the backward-compatibility with save states from before 1.62. It also fixes issues with the libretro core mishandling our new filesystem functions.


It had a bug that would erase games' SRAM if save states were loaded. We have better luck with these .2 releases.


This contains several small fixes for bugs noticed after 1.62 was released.


Another release containing a bunch of small things. There are a few game fixes and some UI tweaks, as well as some reorganization in the backend. The biggest front-facing feature is a Vulkan output for the Windows and Gtk ports. Like OpenGL, Vulkan can use the slang shaders in the libretro repository.


  • Fixed SA1 division with negative dividend again. (Atari2)

  • Fixed timing on several instructions. (pi1541)

  • MSU1 audio with no loop point will not repeat from start.

  • Modernized some old memory-related code.

  • Fixed a desynchronization in interlaced modes and reporting.

  • Remove SA1 access to WRAM.

  • Added second set of registers between S-DSP and S-SMP.

  • Fixes PAL version of Virtual Bart.

Gtk + Windows

  • Added a Vulkan graphics output method. Similar to OpenGL, this can use libretro's slang shaders.

  • Changed the automatic frame skip throttle to take place immediately before showing the frame, making VRR work better.

  • Add menu item to clear recent files entries.

  • Add fixed window size changes up to 10x.


  • Improved the shader parameters dialog with sliders and resize.

  • Allow disabling adding registry entries. 

  • Deletes any existing entries when the option is disabled.


  • Switched to CMake for build system. Removed meson.

  • Fixed some keys not working with modifiers. (Gutawer)

  • Removed graphics options most people won't understand or need.

  • Improved wayland support. Handle fractional DPI properly.


This is a small release for a bunch of little things that have accumulated. Big changes behind the hood are a change to the tile renderer so that it builds much quicker, and a swap of the Gtk port to C++ bindings, both of which should be unnoticeable. Michael Buckley also wrote a completely new macOS port, due to the complete deprecation of the classic APIs the old port used.

- Restructured tile.cpp tile renderer from heavy macros into C++
 templates, significantly lowering compile time. (yoffy)
- MichaelBuckley provided a brand new MacOS port that is completely
 rewritten based on newer, supported APIs.
- Fixed an out-of-bound memory access in sound DSP. (Sour, byuu)
- Revert default SFX2 clock speed increase.
- Added a render position hack. Fixes glitches in several games.
- Allow an SRAM mapping up to 128KB.

- Apply turbo mode volume when rewinding.
- Added menu entry to load oops files, and an option to confirm before
 saving or loading states.
- Fixed sound volume resetting when sound reinitializes.
- Added a save-state preview dialog.
- Added save banks for up to 100 states
- Added support for relative-style save slots
- Fixed blargg rf filter.
- Show command line options on -h and /?

- Added an option to show time. (taimoorgit)
- Use a submodule for glslang, because it doesn't guarantee API stability.
- Switched to GTK's C++ interface, gtkmm3. This effectively drops
 GTK+ 2.0 support.
- Joysticks can now be hotplugged. (jraby)

- Added audio output threading. (yoffy)
- Added screensaver prevention on joystick use. (greg-kennedy)
- Fix YUY2 conversion. (greg-kennedy)
- Add alsa output support. (cjacker)
- Add I420 conversion. (cjacker)


- Fixed subscreen blending with master brightness < 100%.

- Fixed NMI timing when toggling enable bit. Fixes Chou Aniki--hack removed.

- Reverted an IPL map optimization that misses a weird edge case that caused

  The Great Battle III to lock up.

- Clamp MSU1 addition to max amplitude instead of wrapping. Proper MSU1 tracks

  will not be affected by this.

- Save mipmap_input parameter with customized GLSL and slang shaders.

- Actually use mipmap_input parameter.

- Optimized subscreen math with help from Dwedit.

- Revert to measured APU clock speed instead of nominal speed. Fixes An

  American Tail.

- Fixed broken BPS patch support. (ArtiiP)

- Fixed MSU1 track restarting on load state.


- Changed window flags to allow NVIDIA cards to auto-enable exclusive

  fullscreen mode in OpenGL.

- Added a hidden option "DWMSync" that allows OpenGL to sync to the window

  manager while in windowed or borderless windowed mode.

- The automatic frame skip option no longer limits to 59.94Hz.

- Fixed bad icon scaling.

- Added a hacks dialog to enable settings for older hacks to run.


- Added ability to use Satellaview data in same directory as ROM.

- Fixed deviation from proper libretro spec.

- Added option to use the software NTSC filter. (stellarporter)


- Added icons to the entries to clear binding assignments.

- Fixed overlap in xBRZ multithreading.

- Changed glFenceSync option to an OML_sync option that works better.

- Fixed accumulation of partial pixel data on mouse motion when we update the

  mouse position more than once per frame.

- Allow one key to be bound to many controller buttons on the same controller.

- Force menu and button icons.

- Add the view menu to right-click when SNES mouse isn't used.

- Remove unused status bar option.

- Startup background can be changed in snes9x.conf.

- Improved PortAudio driver.


- Fixed sound output that broke with APU refactor.

Show Previous Changes

Snes9x 1.59.2

- Fix out-of-bounds access on APU memory.

Snes9x 1.59.1

- Fix sound core breakage.

Snes9x 1.59

- Count clock cycles to synchronize SA1 with S-CPU properly. Based mostly on

  work by Vitor Vilela.

- Only allow instant IRQ when toggling IRQ. Fixes WWF - Wrestlemania.

- Refactored APU output code to buffer less on the client side. Removed 8-bit,

  Mono, and Reverse Stereo options.

- Consistently handle interlacing when we skip frames.

- Changed APU clock to reflect nominal values for original hardware.

- Fix C4 square instruction regression.


- Don't display Joypad 2 pressed keys if disabled.

- Add support for libretro ".slang" shaders to OpenGL driver.

- Removed glitch-prone DirectSound audio driver in favor of a generic Wave Out


- Moved sound sync to drivers to be more reactive. This makes sound sync and

  dynamic resampling work more reliably.

- Cleaned up dialog boxes to be more consistently spaced.

- Fixed TVMode filter in Direct3D and OpenGL modes.

- Fixed an interaction slowdown with OpenGL and Blargg NTSC filters.


- Fix multiline cheats.


- Switch from autotools to Meson build system.

- Readd glFinish option as alternative to glFenceSync.

- Fix size fallthrough with xBRZ filter.

- Fix loading of key bindings with spaces in them and modifier keys used alone.

- Add support for libretro ".slang" shaders to OpenGL driver.

- Use a cleaner onscreen font.

- Trap errors to allow OpenGL <= 2.1 to run again.

- Break display settings up to make it easier to access hardware accel section.

Snes9x 1.58

- Move the LICENSE file to the base directory and use a stub

  in all the source files referring to it.

- Adjust Chou Aniki timing hack.

- Use 1-based numbering when displaying pressed keys.

- Hide controller port if disabled when displaying keys.

- Fix movie playback. (OV2, BearOso)


- Fix interlaced modes when overscan crop is enabled.

- Allow overriding -flto. (orbea)


- Use shared snes_ntsc implementation.

- Remove extra LGPL licensing to avoid confusion.

- Don't translate config file entries. Fixes breakage on

  non-C languages.

- Fix issue where config file doesn't contain all configurable


- Remove config options for Netplay, Joystick, and JMA. SDL 2.0

  is now mandatory.

- Updated gettext and removed intltool. update-po should now catch

  all translatable strings.

- If available, reduce input lag option will now use fences instead

  of glFinish to prevent hogging the CPU.

- Onscreen text can be variable width and will show up in some more

  cases now.


- Add audio device selection (XAudio2 only)

Snes9x 1.57

- Various seta010 emulation fixes.                          (kps501)

- Pass blargg OAM tests with proper write behavior.         (BearOso)

- Prevent interlacing in BG modes 1-4.                      (BearOso)

- Corrected IRQ and NMI emulation to allow more games to

  work properly.                                            (BearOso, OV2)

- Use 1 instead of 0 for initial PPU left window coordinate,

  fixing garbage in left column of pixels in some games.    (turhope)

- Added interpolation option hack for DSP.                  (kps501, mudlord,


- Added sprite-tile limit disabling hack.                   (Tatsuya79)

- Added libretro's fast snapshot support.                   (OV2)

- Add overclocking hack that increases IPC                  (retrotalker)

- Fix controller initialization issues preventing some games

  from using multitap.                                      (retrotalker)

- Proper write behavior for register $2122.                 (BearOso)

- Fix transparency issue with Star Fox asteroids.           (redguy, BearOso)

- Increase SuperFX speed to more accurately represent

  hardware, and fix bugs with Stunt Race FX and Yoshi's

  Island.                                                   (BearOso)

- Resize viewport on state load.                            (retrotalker)

- Many fixes to variables not saved or saved incorrectly in

  save states.                                              (Dwedit)

- Pass decimal tests in blargg's math test ROMs.            (BearOso)

- Remove memory leak in loadzip.cpp.                        (bonimy)

- Fix screen size not reverting when overscan is turned on

  then off mid-frame.                                       (BearOso)


- Include DirectDraw libraries and compile with DirectDraw

  support by default.                                       (OV2)

- Add a link to DirectX installer in error message displayed

  when the needed DirectX libraries can't be found.         (OV2)

- Save window position when exiting via menu                (OV2)

- Make custom ROM dialog resizable.                         (OV2)

- Fix various cheat dialog issues.                          (OV2)

- Remove d3d9x DLL dependency by using DirectXMath.         (OV2)

- Remove rarely-used HLSL shader option.                    (OV2)

- Add InitialSnapshotFilename support.                      (BearOso)

- Disable BG toggle keys by default.                        (BearOso)

- Proper centering and cropping for overscanned and

  regular height modes.                                     (OV2)

- Remove ability to disable the SNES's hires modes.         (OV2)

- Added a Super Famicom-style icon resource to the EXE.     (BearOso)


- Partial support for new cheats format.                    (OV2)

- Fix MacOS build.                                          (marconett)

- Set default for new config options.                       (tmkk)

- Fix compilation on Mac OS Mojave                          (meepingsnesroms)


- Massive update of libretro code to latest downstream.      (fr500, kps501,

                                                             OV2, twinaphex,



                                                             m4xw, kxyxz,



- Use datarootdir instead of datadir on install.            (orbea)

- Fix --with-system-zip configure flag.                     (BearOso)

- Draw interlaced fields when ready.                        (BearOso)

- Initial Wayland support.                                  (remicalixte)

- Allow XV only in X11.                                     (BearOso)

- Add Wayland support via EGL.                              (BearOso)

- Significant rewrite of OpenGL driver to support newer

  standards. This won't work on cards < OpenGL ~1.5.        (BearOso)

- Changed frameskip option to speed throttling option with

  simpler, but more relevant methods of speed control.      (BearOso)

- Add support for relative-style save slots.                (ichigo-0, BearOso)

- Remove XML config file format in favor of one more like

  Win32. Make joystick bindings and more options human-

  readable and editable.                                    (BearOso)

- Try more device nodes when initializing OSS.              (BearOso)

Snes9x 1.56.2

- Fixed IRQ corner case that caused Umihara Kawase's water

  to cover the whole screen.                                (BearOso)

- Adjusted IRQ timing slightly. Fixes Dragon Ball Z - Super

  Butouden 2.                                               (BearOso)

- Clear WAI when IRQLine is active. Fixes Top Gear 3000.    (BearOso)

- Fix reading the wrong tile data in mosaic drawing. Gets

  rid of glitch at top of FF6 battle transitions.           (BearOso)

- Break a specific opcode into cycles. Fixes Little Magic.  (BearOso)

- Win32: Don't mix garbage into the last line with NTSC

  filter.                                                   (OV2)

- Win32: Allow disabling scanlines in NTSC filter.          (BearOso)

- GTK+: Added an undo load state option.                    (BearOso)

- GTK+: Fixed compilation on big-endian systems.            (OV2)

- Win32, GTK+: Added integer scaling option.                (BearOso)

- GTK+, Unix: Preserve current joypad state when rewinding. (BearOso)

Snes9x 1.56.1

- Automatic input rate now only works for close multiples   (BearOso)

  of 60Hz.

- Win32: Cheats are now shown in the correct order in the   (BearOso)

  list view.

- GTK+: Check for version greater than 3.22 when using GTK+ (BearOso)


- GTK+: Don't resize code and description field in GTK+ 2.  (BearOso)

Snes9x 1.56

- Increased the speed of SA1 emulation to match hardware    (BearOso)

  more closely.

- Fixed negative SA1 division                               (BearOso, Jonas Quinn)

- Changed the location where we poll input to potentially   (Brunnis, BearOso)

  reduce lag.

- Fixed the interlace fields being swapped after skipping   (BearOso)


- More updates for BS-X support.                            (LuigiBlood)

- Updated xBRZ to version 1.6.                              (zenju, OV2)

- Added a DMA timing hack for rpgone's Koryu no Mimi        (OV2)


- Updated HDMA to not update indirect addresses until after (BearOso)

  transfers are completed.

- Improved cheats support. This stores cheats in a human-   (BearOso, OV2)

  readable and editable format as gamename.cht. Cheats are

  converted from the old format on load. They can be added

  in many different formats, but they will convert to the

  simple address=condition?byte format.

  Also, now included is mightymo's cheat database, and the

  ability to match a game and automatically load cheats

  from it.

- Don't reset a pending NMI on vblank end. Fixes Super      (furrykef)


- Redo NMI timing. Fixes Secret of Evermore (PAL).          (BearOso)

- Test for transparency before dithering on SuperFX. This   (RedGuy(yyy))

  fixes some graphical artifacts in Star Fox.

- Change some of the SDD1 guesswork mapping. Fixes a Tales  (BearOso)

  of Phantasia hack.

- Return PPU1 MDR for reads of $2137 instead of CPU MDR.    (BearOso)

  Fixes Mario's Time Machine graphical glitch.

- Memset less memory for sprite calculations.               (Nebuleon)

- Don't spuriously update register 14 when running SuperFX. (BearOso)

  Fixes graphical glitches in Doom.

- Added a SuperFX clock modifier variable.                  (BearOso)

- Write CPU MDR during some DMA and HDMA transfers. Fixes   (BearOso)

  Speedy Gonzales and Funaki Masakatsu Hybrid Wrestler.

- Calculate next IRQ time in advance instead of continously (BearOso, OV2)

  checking for it.

- Added some IRQ timing quirks. Fixes at least Marko's      (BearOso, OV2)

  Magic Football.

- Fixed wrong tile selection in offset-per-tile mode.       (BearOso)

- Advance the VRAM pointer even if VRAM writes at the time  (kps501)

  are invalid.

- Return 0x80 instead of 0xff in DSP1 simulation. Fixes     (kps501)

  Powerfest '94 Mario Kart.

- Initialize controllers on reset. Fixes Looney Tunes       (kps501)

  B-Ball multitap.

- Attached APU instruction tracer and made some additions   (BearOso)

  to debugging output.

- Fix line doubling in interlaced mode.                     (kps501)

- Added support for M.A.C.S. rifle peripheral.              (kps501)

- Fixed a bug where the MSU1 channels were reversed.        (qwertymodo)

- Win32: Added dynamic rate control support for XAudio2     (OV2)

- Win32: Added different volume level configuration for     (OV2)

  regular and turbo speed.

- Win32: Added option to disable EPX scaling for messages   (OV2)

- Win32: Improve multi-rom loading.                         (OV2)

- Win32: Add libpng and zlib dependencies as submodules for (qwertymodo, OV2)

  easier compiling from source.

- Win32: Fixed icon registration.                           (OV2)

- Win32: Better support for running while unfocused.        (OV2)

- Win32: Changed icon.                                      (BearOso)

- Win32: Report hidpi support.                              (BearOso)

- Win32: Added mute hotkey and hotkeys for saving/loading   (OV2)

  from file.

- Win32: Disabled hotplugging in favor of a menu option to  (OV2)

  reconfigure joysticks.

- Win32: Added a reduce input lag option.                   (BearOso)

- Win32: Added ability to use GLSLP shaders with OpenGL,    (OV2)

  including a dialog to tweak custom parameters.

- GTK+: Added dynamic rate control support for audio to     (BearOso)

  reduce buffer overflows and underflows.

- GTK+: Increased SDL requirement to version 2.0. This      (BearOso)

  improves joystick compatibility.

- GTK+: Improved GTK+ 3.0 support and made it the default.  (BearOso)

- GTK+: Added ability to start from a snapshot on the       (julien2512)

  command line.

- GTK+: Added automatic input rate handling.                (BearOso)

- GTK+: Use 16-bit 5-6-5 pixel format for better colors.    (BearOso)

- GTK+: Now disables the compositor in fullscreen mode.     (BearOso)

- GTK+: Changed icon.                                       (BearOso)

- GTK+: Require libepoxy for OpenGL support.                (BearOso)

- GTK+: Add full compatibility with GLSLP shaders, with a   (BearOso)

  parameters dialog to configure them.

- Unix: Add xinerama support and window position hints.     (Francesco149)

Snes9x 1.55

- Added support for the MSU-1 coprocessor.                  (qwertymodo)

- Added support for MSU-1 distribution pack.                (qwertymodo)

- Added support for BS-X Satellaview memory packs and data  (LuigiBlood)


- Improved BS-X memory mapping accuracy.                    (LuigiBlood)

- Fixed APU error causing issues with some games.           (byuu, qwertymodo)

- Added option to ignore patch checksums.                   (qwertymodo)

- Fixed build warnings / undefined behavior.                (bonimy)

- Correct pixel placement in hires.                         (BearOso, OV2)

- Fixed RAM mapping for Light Fantasy.                      (hex_usr, BearOso)

- Added Circuit USA APU timing hack.                        (BearOso)

- libretro: Merged some changes from downstream repository. (OV2)

- GTK+: Allow use of XDG config directory.                  (BearOso)

- GTK+: Add 10th save slot.                                 (YamashitaRen)

- GTK+: Updated Spanish translation.                        (jristz)

- Win32: Switched to Studio 2017.                           (OV2)

- Win32: Fixed problems when minimized in d3d.              (OV2)

- Win32: Split Patch/Rom directory.                         (OV2)

- Win32: Simplified compilation by removing or including

  some dependencies (included CG headers, completely

  removed FMOD and FMOD_EX, moved direct draw to compile

  switch) and reworking solution/configurations.            (bonimy, OV2)

- Win32: Fixed crash with movie dialog                      (OV2)

- Win32: Changed hotplugging                                (OV2)

Snes9x 1.54.1

- GTK+: Properly use --std=c++11 when compiling xBRZ.       (BearOso)

- Win32: Save window position when toggling fullscreen.     (OV2)

- Win32: Do not assign down-left binding to down-right.     (OV2)

Snes9x 1.54

- Changed the S-SMP core module to one written by byuu.     (byuu, BearOso)

  This has the effect of increased accuracy, fewer

  speed hacks, but also regresses a few speed-hack games.

- Improved IRQ emulation in several cases.                  (OV2)

- Added rewind support.                                     (Themaister, OV2)

- Included libretro port.                                   (OV2, libretro team)

- Added bps soft-patching support                           (OV2)

- Fixed MMC bank register bit 7, restored 64mbit ExLoRom

  map                                                       (FuSoYa)

- GTK+, Windows: Added xBRZ filter                          (Zenju, OV2, nmagre)

- GTK+: Fixed several issues with GTK+3.                    (BearOso)

- GTK+: Added extra aspect ratio options.                   (BearOso)

- GTK+: Added option to mute sound when using turbo mode.   (BearOso)

- GTK+: Fixed expose handling to reduce overdraw and        (BearOso)

  improve performance.

- GTK+: Updated and universalized Spanish translation.      (jristz)

- Unix: Added Xv support and fixed several bugs.            (greg-kennedy)

- Win32: Added CG meta shader support                       (OV2, Themaister)

- Win32: Added support to detect joypad changes             (OV2)

- Win32: Fixed unicode command line parameters,

  Fixed controller command line parameters                  (OV2)

- Win32: Added quit hotkey                                  (OV2)

- Win32: Fixed custom rom dialog                            (OV2)

- Win32: Fixed various cheat dialog issues                  (gocha, OV2)

- Win32: Added hotkey for fast forward toggling             (gocha)

- Win32: Added drag and drop support for movies             (gocha)

- Win32: Fixed blargg filter for regular width hires        (OV2)

- Win32: Fixed snapshot loading from unicode paths          (OV2)

- Win32: Changed open-with file-association method, should

  no longer change explorer icons for otherwise

  unassociated extensions; removed legacy extensions        (OV2)

Snes9x 1.53

- Rebuilt IRQ handling.                                     (zones)

- Improved overall timings, now Snes9x can handle events in

  a opcode a little.                                        (zones)

- Improved screen interlace and sprite interlace supports.  (OV2, zones)

- Fixed Hi-Res pixel plotter.                               (BearOso, zones, OV2)

- Fixed C4 for Mega Man X2's "weapon get" screen.           (Jonas Quinn)

- Fixed Super Buster Bros. graphics after reset.            (Jonas Quinn)

- Improved SA-1 support.                                    (zones)

- Added SA-1 CC2 support.                                   (Jonas Quinn, byuu)

- Fixed SA-1 NMI override mode.                             (zones)

- Fixed Dual Orb 2 sound glitch.                            (byuu)

- New APU timing hack, fixes various games that exhibit

  problems with Blargg's SNES_SPC library.                  (OV2)

- Fixed the problem that echo buffer breaks IPL ROM.        (zones, OV2)

- Fixed movie snapshot unfreeze inconsistency.              (gocha)

- Faster config file saving.                                (OV2)

- Fixed BlockInvalidVRAMAccess config file option.

  (windows port, unix port and gtk legacy config)           (Jonas Quinn)

- Remove POSIX dup and access calls, and rename qword to

  fix compilation with Cell SDK.                            (BearOso)

- Fixed PS3 version save state crash by using heap

  allocation for soundsnapshot.                             (danieldematteis)

- Fixed crash relating to double-closed descriptor.         (BearOso)

- Removed CPUShutdown speedhack, DisableHDMA and

  DisableIRQ options.                                       (zones)

- Removed remaining outdated asm code.                      (zones)

- JMA 64 bit support.                                       (kode54, Nach, friedrich.goepel)

- GTK+, Win32, Mac: Added optional Hi-Res blending.         (BearOso, OV2, zones)

- GTK+, Win32: Support for bsnes-style XML shaders.         (BearOso, OV2)

- Win32: Full unicode support.                              (OV2)

- Win32: Restored OpenGL mode.                              (OV2)

- Win32: x64 version.                                       (OV2)

- Win32: HLSL shader support.                               (mudlord)

- Win32: Win7 jumplist synchronizes with recent roms list.  (OV2)

- Win32: Updated menu structure.                            (OV2)

- Win32: Drag&Drop support for ROMs.                        (gocha, OV2)

- Win32: Reworked movie-recording with size selection.      (gocha, OV2)

- Win32: Restored SPC save option.                          (OV2)

- Win32: Fixed vsync in DirectDraw.                         (OV2)

- Win32: Improved window position saving.                   (OV2)

- Win32: Restored compile with DEBUGGER.                    (gocha)

- Win32: Fixed various edge-case errors and/or possible

  leaks.                                                    (Brian Friesen)

- Win32: Config file option to always center image.         (OV2)

- Win32: Fixed "Turbo Down mode" hotkey assignment.         (gocha)

- Win32: Added and fixed Autofire for D-pad.                (gocha)

- Win32: Fixed aggressive soundsync wait.                   (OV2)

- Win32: Added window size presets.                         (OV2)

- Mac  : Added pause and frame advance functions.           (zones)

- Mac  : Now you can choose any folder for saving files.    (zones)

- Mac  : Updated Music Box (mostly internally).             (zones)

- Mac  : Fixed gliches in open/save dialogs on 10.6.        (zones)

- Mac  : Fixed display configuration in windowed mode.      (zones)

- Unix : Fixed segfault and hang-up with -DNOSOUND.         (zones)

- GTK+ : Added ability to set specific folders for SRAM,

  patches, snapshots, etc.                                  (BearOso)

- GTK+ : Fixed many permissions issues with config folders. (BearOso)

- GTK+ : Updated compatibility with latest GTK+ and

  GtkBuilder. Added experimental support for GTK+ 3.x.      (BearOso)

- GTK+ : Updated software output to use cairo and added the

  ability to use bilinear-filtering with it.                (BearOso)

- GTK+ : Fixed issues where cheats wouldn't stay enabled.   (BearOso)

- GTK+ : Fixed focus issue when there is no window manager. (BearOso)

- GTK+ : Fixed X Visual incompatibilities and expose

  problems in the Xv and OpenGL outputs.                    (BearOso)

- GTK+ : Fixed vsync with new X Server and NVIDIA drivers.  (BearOso)

- GTK+ : Added "Reduce input lag" option to OpenGL output.  (BearOso)

- GTK+ : Added a visual indication of the expected video

  refresh rate for the currently selected sound input rate. (BearOso)

Snes9x 1.52

- IMPORTANT NOTICE: The structure of savestates (also known

  as snapshots / freeze files) is incompatible with older

  versions! Snes9x 1.52 cannot read the savestates created

  by 1.51 or older.                                         (zones)

- Highly acculate SPC700 and S-DSP emulation.               (Blargg)

- Replaced APU emulation cores (SPC700 and S-DSP) with

  ones provided by Blargg's SNES_SPC library. This renders

  savestates incompatible with older versions.              (BearOso, zones)

- SPC7110 emulation.                                        (byuu, neviksti)

- Merged bsnes' SPC7110 emulation code. Note that the .rtc

  file of Far East of Eden Zero is incompatible with older

  versions.                                                 (zones)

- Removed graphics pack support. It's no more necessary.    (zones)

- Replaced S-RTC emulation code with bsnes' one to keep the

  good compatibility of .rtc files between the two

  emulators. As a result, Daikaijuu Monogatari 2 now

  outputs the .rtc file, and its .srm file is incompatible

  with older versions.                                      (zones)

- Added savestate supports for DSP-2, DSP-4, ST-010 and

  OBC1.                                                     (zones)

- Added UPS support.                                        (byuu)

- Fixed DSP-4 AI problem.                                   (Jonas Quinn)

- Fixed invalid memory accesses in C4 and OBC1 codes.       (zones)

- Fixed invalid memory accesses in BSX codes. My mistake.   (zones)

- Fixed the read value of $213e, $4210 and $4211.           (zones)

- Fixed the writing of word values at the memory boundary.  (zones)

- Fixed the bug that the unnecessary SA-1 emulation

  continues once any SA-1 games are launched.               (zones)

- Removed old color blending codes.                         (zones)

- Removed too-old Snes96 and ZSNES snapshot support.        (zones)

- Updated command-line options.                             (zones)

- Code cleaning.                                            (zones)

- GTK+ : Added a port of Snes9x to the GTK+ toolkit.        (BearOso)

- Unix : Reconstructed and simplified all the contents.

  Some features have been removed to be simple, and many

  options have changed. GTK+ port is recommended for most

  of Linux users.                                           (zones)

- Win32: Now uses snes9x.conf to prevent problems with

  modified meaning of settings.                             (OV2)

- Win32: Removed broken OpenGL mode.                        (OV2)

- Win32: Removed support for 8bit output.                   (OV2)

- Win32: Reworked settings dialogues to accomodate the

  new APU core and display settings.                        (OV2)

- Win32: Updated defaults to use D3D and XA2 (better

  Vista and Win7 support).                                  (OV2)

- Win32: Direct3D and XAudio2 support.                      (OV2)

- Win32: Added Blargg's ntsc filter (three presets).        (OV2)

- Mac  : Fixed corrupted screenshot on Intel Mac.           (zones)

- Mac  : Fixed sudden abort in QuickTime movie export on

  Intel Mac.                                                (zones)

- Mac  : Changed sound settings for the new APU core.       (zones)

- Mac  : Changed the default folder which Snes9x looks for

  to 'Application Support' folder.                          (zones)

- Mac  : Changed folder names: 'IPSs' -> 'Patches',

  'BIOSs' -> 'BIOSes'.                                      (zones)

- Mac  : Added Blargg's ntsc filter.                        (zones)

- Mac  : Internal changes for Leopard and Snow Leopard.     (zones)

Snes9x 1.51

- Added DSP1 and SuperFX savestate support.                 (nitsuja)

- Added screen state GFX to save states. (optional)         (nitsuja)

- Fixed desync when loading inconsistent state in playback. (nitsuja)

- When playback reaches a movie's end, recording continues

  instead of the movie suddenly closing. (after recording)  (nitsuja)

- can now record resets and mouse/superscope/justifier(s)   (nitsuja)

- Added same-line-comment support for config files.         (nitsuja)

- input display for all controllers (including peripherals) (nitsuja)

- Win32: Now uses .cfg file instead of Windows registry.    (nitsuja)

- Win32: open ROM dialog bugfixes and speedup and facelift  (nitsuja)

- Win32: option to use standard file open dialog for ROMs   (nitsuja)

- Win32: maintain aspect ratio and bilinear filter stretch  (nitsuja)

- Win32: optional removal of the dreaded "black bar"        (nitsuja)

- Win32: Added EPX,EPX2,EPX3,HQ2X,HQ3X,TV3X,DM3X filters.   (nitsuja)

- Win32: Added hires support for Interlace and TV Mode.     (nitsuja)

- Win32: text removed from .avi output (optional)           (nitsuja)

- Win32: better directory management, customizeable         (nitsuja)

- Win32: Screenshot support is back.                        (nitsuja)

- Win32: Netplay is back (but still not very good).         (nitsuja)

- Win32: Made OpenGL Bi-linear an advanced .cfg option.     (nitsuja)

- Win32: cheat search improvements (address, watch, SuperFX)(nitsuja)

- Win32: Added non-modal ("active") cheat search option.    (nitsuja)

- Win32: new hotkey-config dialog and configurable hotkeys  (nitsuja)

- Win32: Fixed joystick config in input dialog.             (nitsuja)

- Win32: Fixed hires and extended height .avi output.       (nitsuja)

- Win32: various small GUI improvements                     (nitsuja)

- Win32: Netplay fixes.                                     (nitsuja)

- "Fake Mute" desync workaround option for movies, until

  all ports have deterministic sound.                       (Bisqwit, nitsuja)

- Fix for save state blocks > 999999 bytes.                 (Bisqwit)

- C4 games now save C4 data in save states.                 (DeHackEd)

- Unix: Framework for high-speed seeking. Specify a frame

  number in a movie, and the emulator will run at

  maximum speed to that frame. Untested.                    (DeHackEd)

- X11: Support for window exposure. When a window is

  damaged due to overlay, being iconified, etc. it will

  be repainted correctly.                                   (DeHackEd)

- Unix: parameter: -autodemo <filename> loads a movie for

  playback on startup. Only the x11 code handles this

  right now.                                                (DeHackEd)

- Unix: parameter: -oldturbo,  the turbo button renders all

  frames when fast-forwarding.                              (DeHackEd)

- Unix: parameter: -upanddown, override U+D and

  L+R protection.                                           (DeHackEd)

- Unix: parameter: -mute, currently linux only, blocks out

  audio output from your speakers while still emulating

  sound. Not fully tested.                                  (DeHackEd)

- Unix: parameter: -maxframes <target> during movie

  playback, snes9x will exit when the target is hit.        (DeHackEd)

- Unix: parameter: -keypress shows to stderr and on-screen

  the currently pressed buttons on joypad 1.                (DeHackEd)

- Unix: Stream dumping (NOT COMPLETE). With -dumpstreams,

  raw video and raw audio are dumped to videostream%d.dat

  and audiostream%d.dat, where %d increments on each CPU

  reset, starting at zero.                                  (DeHackEd)

- Unix: Non-blocking sound on Linux. It makes seeking nicer.(DeHackEd)

- Unix: Configurable sound device.                          (pierredavidbelanger)

- now requires a sufficiently new version of

  autoconf.                                                 (anomie)

- Fixed slow versions of branch opcodes.                    (anomie)

- Fixed the mosaic offset bug.                              (anomie)

- No sorting by priority in C4 command 00 00. MegaMan X2

  can go behind the legs of the intro stage boss.           (anomie)

- New RTO discovery, fixes Super Conflict: The Mideast

  title screen.                                             (anomie, byuu)

- A 1->0 transition on $2100.7 causes OAM Address Reset.    (anomie, byuu)

- The final HDMA Indirect Address load is only weird

  on the last channel of the scanline.

  Touge Densetsu Saisoku Battle problem solved.             (anomie, byuu)

- Fixed BGnVOFS bug. Only HOFS needs ~&7 update.            (byuu)

- Fixed superfluous VIRQ triggers.                          (zones)

- Fixed missing IRQ trigger just after the previous one.    (zones)

- Fixed missing IRQ while writing to $4200.                 (zones)

- Fixed IRQ timing after WRAM refresh.                      (zones)

- Fixed NMA timing after DMA transfer.                      (zones)

- Fixed superfluous auto-joypad-reading.                    (zones)

- Fixed missing WRAM refresh during DMA transfer.           (zones)

- Fixed DMA so that HDMA and any HC triggered events can

  run during DMA transfer.                                  (zones)

- Roughly fixed the case that HDMA and DMA use the same

  channel at the same time. HDMA kills DMA. Thanks byuu.    (zones)

- Changed initial DMA registers values.                     (zones)

- Slightly modified APU execute timings.                    (zones)

- Fixed APU I/O registers to get/set the proper value.      (zones)

- Blocked invalid VRAM writings, though you can turn off

  this option due to Snes9x's inaccurate timings.           (zones)

- Omitted SPCTOOL, no one uses it.                          (zones)

- Added Sufami Turbo support.                               (zones)

- Added Same Game add-on cart support.                      (zones)

- Fixed HiROM SRAM and DSP1-4 memory maps a little.         (zones)

- Improved mirroring.                                       (Nach, grinvader, byuu)

- CRC32 on BS dumps now follows uCONSRT standard.           (Nach)

- BS dumps now always run in NTSC mode.                     (Nach)

- Unknown regions (generally betas) default to NTSC.        (Nach)

- Now support NSRT headers for setting up controllers.      (Nach, nitsuja)

- Unix: Fixed command line help output.                     (Nach)

- Unix: Sound now defaults to 32KHz, Stereo, Interpolation

  so Snes9x finally sounds like a real SNES by default.     (Nach)

- Win32: Saner defaults for movie record.                   (Nach)

- Unix: Fixed crashing with mouse or super scope.           (Nach)

- Removed some weird code which was crashing Korean

  League and its varients.                                  (Nach)

- Win32: Can now compile with MinGW.                        (Jonas Quinn, Nach)

- Win32: Can now cross compile Snes9xw.                     (Nach)

- Unix: SSnes9x compiles again.                             (Nach)

- Win32: ZSNES C4 and SuperFX compiles once again.          (Jonas Quinn)

- Unix: Netplay Fixes.                                      (Nach)

- Unix: Netplay Improvements.                               (Fabianx)

Snes9x 1.5

- Pseudo-hires rendering flush, Old 2xsai endian fix        (anomie)

- Added 'oops' auto-snapshot support                        (anomie)

- Fixed usage messages (Unix)                               (anomie)

- Old split-ROM-in-zip bugfix                               (anomie)

- ./configure fix for detecting libpng                      (anomie)

- Fix "no PNG support" error message                        (anomie)

- Anomie's control remapping patch                          (anomie)

- Support for IPS patches in the zip file                   (anomie)

- OBC1 savestate fix                                        (Overload)

- Fix turbo frameskip, X11 keyboard auto-repeat, VRAM reads (anomie)

- Add some missing ifdefs (UNZIP_SUPPORT and ZLIB),

  from AaronOneal                                           (anomie)

- Config file for Unix/X11 and Unix/SVGA                    (anomie)

- CPU instruction fixes (mostly emulation mode & timing)    (anomie)

- Mode 7 fixes                                              (anomie)

- Rewrote the renderer. Enjoy!                              (anomie)

- Correct-ish memmap boundary testing.                      (anomie)

- Add support for saner directory structures under Unix     (anomie)

- Unix: Fixed detection of newer libpng (spotted by vapier) (PBortas)

- Added 4-point gaussian interpolation and proper envelopes

  many thanks to Brad Martin and TRAC.                      (zones)

- Fixed several sound problems.                             (zones)

- Fixed the memory access problem in C++ Super FX core.     (zones)

- Speed adjustment of C++ Super FX emulation.               (zones)

- Various timing fixes: NMI, IRQ, WRAM refresh,

  cycles per line, HBlank start, etc.

  Many thanks to byuu for much information.                 (zones)

- Removed some game specific hacks.                         (zones)

- Added partial Satellaview (BS) emulation.                 (Dreamer Nom, zones)

- Added the Katakana font for onscreen messages.            (107)

- Updated JMA to v1                                         (Nach)

- Unix: Fixed JMA options in config                         (Nach)

- Unix: Removed --with(out)-asmcpu option in config

  because the i386 assembler CPU core is out of date.       (zones)

- Unix: Changed the default settings in config.             (zones)

- Updated porting.html (porting.txt) in sync with 1.5.      (zones)

- Fixed buffer over/under flow due to incorrect logical

  operator in S-RTC code                                    (byuu)

- Fixed HDMA flags bug.                                     (byuu, anomie)

- Fixed bugs causing crashing in Unix.                      (Nach)

- Ported Snes9x to AMD64.                                   (John Weidman, Nach, zones)

- Completed DSP-1 code.                                     (Andreas Naive, Overload, Nach)

- Updated DSP-3 code.                                       (Nach, z80 gaiden)

- Updated DSP-4 code.                                       (Dreamer Nom, Nach, z80 gaiden)

- Overhauled BS detection.                                  (Nach)

- Improved Unix portability.                                (Nach, zones)

- Fixed infiniti loop and invalid read bug in

  C++ C4 core.                                              (Nach)

Snes9x 1.43

- Win32: Disabled Netplay                                   (funkyass)

- Win32: Various fixes, including ROM dialog                (funkyass)

- Win32: New Input Config Dialog                            (funkyass)

- Win32: added .avi output feature                          (blip)

- Win32: fixed frame timings >100ms, added frame advance    (blip)

- Rewrote Unfreeze, renamed it S9xUnfreezeFromStream,

  failing to load a freeze file no longer resets emulation  (blip)

- Fixed Unfreeze to restore IPPU.HDMA properly              (blip)

- Rewrote OBC1 code to match the real chip                  (Overload)

- More updates the to DSP-1 code, fixes to projection       (Overload, Andreas Naive)

- Unix/X11: Rewrote keyboard setup code                     (Bisqwit)

- Added movie recording+rerecording support                 (blip, Bisqwit)

- Added -hidemenu CLI switch                                (funkyass)

- fixed broken Win32 filters                                (lantus)

- Added internal support for emulating the new-style SNES   (MKendora)

- Cleaned up many quirks of the cheat search engine         (MKendora, Don Vincenzo)

- Fix mosaic in hires SNES modes (Tokimeki Memorial)        (MKendora, zones)

- Rewrote Legend's hack, added another game to it           (MKendora)

- Optimized the Open ROM dialog                             (MKendora)

- Rewrote the Seta DSP map                                  (The Dumper, MKendora)

- Began string isolation for the UI, eases translation      (funkyass)

- added -nopatch -nocheat, and -cheat CLI items             (MKendora)

- fixed a UI typo                                           (funkyass)

- fixed several C core stack ops in emulation mode          (MKendora)

- split emulation mode ops from native mode ops             (MKendora)

- Seta special chip emulation enhancements                  (Feather, The Dumper, Overload, MKendora)

- code tweaks to the ST010                                  (Nach, pagefault)

- fix some C/asm quirks and HDMA quirks (all my fault)      (MKendora)

- several timing hacks to fix games                         (lantus)

- improved checksumming for odd mirrorings                  (MKendora)

- Snes9x uses a standard zlib instead of a packaged one     (PBortas)

- Exhaust Heat 2 and regional ports are playable            (Feather, The Dumper, Overload, MKendora)

- Game Doctor dumps that are 24 Mbit are now supported by

  a force option                                            (MKendora, Nach)

- SuperFx interleave format is now considered deprecated.

  Support will be removed in future versions                (Team decision)

- made SuperFx interleave detection a compile option        (MKendora)

- added memory maps for slotted games                       (MKendora)

- fixed a typo in the usage messages                        (MKendora)

- fixed the bug that had nuked optimizations                (The Dumper)

- restored full speed optimizations in release builds       (funkyass)

- Added non-speed-hack version of color subtraction.        (zones)

- OpenGL info message font fix                              (zones)

- APU timer fix                                             (zones, Nach)

- Fixed mouse offset in resized X11 window.                 (PhaethonH)

- Fixed a (presumably) long-standing bug: Mode 6's BG is

  depth 4, not depth 8!                                     (anomie)

- Unix: unmap all joystick buttons before applying -joymapX (anomie)

- Win32: added a define to disable pausing when focus is

  lost, NOPAUSE                                             (funkyass)

- Win32: Changed the default for Auto-save SRAM to 15 sec   (funkyass)

- Dreamcast: Added SH4 assembler                            (PBortas, Marcus Comstedt, Per Hedbor)

- C90 and aclocal 1.8 warning fixes (thanks Ville Skytt)    (PBortas)

- Unix: AMD64 compilation fixes.                            (PBortas)

- Added support for NSRT Team's JMA format                  (Nach, NSRT Team, funkyass)

- Unix: Loading a zip file on binaries without zip support

  will give an appropriate error message                    (Nach)

- Unix: Added install target with proper --prefix handling. (PBortas)

Snes9x 1.42

- Added 8-bit rendering filters                             (funkyass)

- Added Sanity Checks for the Display Dialog                (funkyass)

- New Layout for the Joypad Dialog,                         (funkyass)

- Fixed that anoying Joypad dialog bug. Now check to see

  if the axis exists before asking for the info form it     (funkyass)

- Added full POV support.                                   (funkyass)

- Fixed sram sizes for SuperFx games                        (Nach, MKendora)

- Stopped saving sram for games with no battery             (Nach, Mkendora)

- Killed the gray line and slightly optimized Win32 GL      (MKendora)

- stack wrapping fix in C core                              (MKendora)

- removed some dead hacks (Oda Nobunaga and Dezaemon)       (MKendora)

- fixed some DMA and HDMA modes                             (anomie, MKendora)

- improved HDMA timing                                      (anomie)

- cleaned up load and deinterleave code                     (MKendora)

- removed old UI DLL                                        (MKendora)

- new cheat dialogs                                         (MKendora)

- started Unicode preparation in Win32 UI                   (MKendora)

- Implement odd sprite sizes, sprite priority rotation.     (anomie)

- RTO code that hopefully works. MK's #define is

  "MK_DEBUG_RTO" to try to debug the RTO code.              (anomie)

- SDD1 decompression support for Linux. Also added a new

  command line option -sdd1-pack.                           (anomie)

- Added correct VRAM read logic. #define CORRECT_VRAM_READS

  if you want it.                                           (anomie)

- removed the non-VAR_CYCLES path                           (MKendora)

- changed access timing map to be address-based.            (MKendora, anomie)

- DSP-1 updates                                             (Overload, Andreas Naive)

- S-DD1 decompression support                               (Andreas Naive)

- optimized S-DD1 code                                      (anomie)

- S-DD1 can use packs or decompression                      (MKendora)

- More work on Exhaust Heat 2                               (MKendora, Overload, The Dumper)

- separated ROM detection from file reading                 (lantus)

- fixed a mirroring bug in LoROMs                           (MKendora)

- cleaned up some mapping issues                            (MKendora)

- ST018 games now boot before locking up                    (Mkendora, Overload)

- SA-1 state was not completely reset, crashed Marvelous    (zones)

- Removed sample caching. It caused problems, and was not

  noticably faster.                                         (MKendora)

- Fixed interlace without breaking the displays for MK      (anomie)

- Fixed a PPU OpenBus hack                                  (anomie)

- Moved SPC7110 and S-DD1 regs to speed up the general case

  of reading the $4xxx registers                            (MKendora)

- altered Hi/Lo ROM detection to fix a few misdetects.      (MKendora)

- Implemented RTO flags. With MK's implementation of $213F's

  interlace bit, we now pass the SNES Test Cart's

  Electronics Test                                          (anomie)

- Fix sprite windowing bug                                  (anomie)

- Way back in 1.40 MK changed the Windows port to default

  to a plain old joypad instead of the MP5. And then we

  removed the hacks for games that dislike the MP5. So

  we need to change the defaults elsewhere too...           (anomie)

- cleaned up the hacks section somewhat                     (MKendora)

- removed some interleave hacks                             (MKendora)

- fixed a bug in KartContents                               (MKendora)

- transparency fix for Jurassic Park                        (lantus)

- A hidden Win32 feature                                    (MKendora)

- Kludged Mark Davis until I get stable APU timing          (MKendora)

- Win32 renders overscan always, fixes some jumpy games     (MKendora, lantus)

- Fixed an FMOD bug                                         (MKendora)

- cosmetic tweaks                                           (Everyone)

- Fixed 2 special chip bugs in the C core                   (zones)

- Added some sanity fixes to the C core, fixes MLBPA

  Baseball for C core users                                 (zones)

- updated zlib source (includes 1.1.4-1 patch)              (MKendora)

- compiler warning fixes                                    (PBortas)

- Updated the SuperFx asm core                              (pagefault)

- Kludged Unix compilation to produce working SuperFx       (PBortas)

  with the asm core.

- Kludged VC to deal with optimization weirdness            (MKendora)

- Hacked Robocop vs. Terminator using Daffy Duck hack. Stops

  flashing.                                                 (MKendora)

- Added some defines to the asm core                        (MKendora)

- Added possibility to take screenshots on Unix             (PBortas)

- Initialize the C SuperFx core better                      (PBortas)

- Kludge a Japanese golf game until the APU timing is fixed (MKendora)

Snes9x 1.41-1

- Oops, in the asm CPU core i was stomping on %eax too

  early, so register $4210 wasn't getting set properly.     (anomie)

Snes9x 1.41

- Win32 controllers now stay the same between games         (MKendora)

- Win 32 Open ROM dialog fixes                              (MKendora)

- Win32 Display dialog fixes                                (funkyass)

- Win32 OpenGL ratio tweaking. (Reduces the gray line)      (kode54)

- Fixed Win32 superscope for those having issues            (MKendora)

- Generic accuracy fix in main SUperscope emulation         (MKendora)

- sprite bug fixed (gah! How'd we miss that)                (anomie)

- SPC saving compatibility fix                              (Caz and zones)

- Window clipping update                                    (anomie)

- Mode 7 clipping fix                                       (TRAC)

- latching fix                                              (anomie)

- BS BIOS checksum and mapping fix                          (MKendora)

- Working Uniracers hack (dma.cpp)                          (anomie)

- HDMA Indirect Address fix for Romancing Saga 2            (anomie)

- Better savestate hack, does it break anything?            (anomie)

- C4 C core fixes. Mostly Trapezoid (thanks Nach),

  some s/short/int16/, some indentation.                    (anomie)

- Damn, but the indentation in ppu.cpp was screwed up.

  Killed some dead code too (twas commented forevermore).   (anomie)

- fixed a potential crash in S-DD1 logging                  (MKendora)

- Improved accuracy of Hi/LoROM detection (~500 ROM test)   (MKendora)

- Hack for Moryou Senki Madara 2, don't call

  SelectTileRenderer from DrawOBJS if BGMode is 5 or 6. A

  real fix requires at least rewriting SelectTileRenderer,

  or inlining a special version in DrawOBJS.                (anomie)

- DMA traces: add additional address info to reads too.     (anomie)

- Killed the old Borland Joypad dialog                      (funkyass)

- Fixed issues with Dezaemon and CT, maybe others           (anomie, MKendora)

- Changed the internal snapshot key from \ to VK_F12        (funkyass)

  Fixes issues with non-US keyboard layouts.

- Fixed OAM reset to not occur during forced blank.         (anomie)

- Killed some dead OAM reset code that doesn't need saving. (anomie)

- Unix/X11: Fixed screen jumping. CT enables overscan mid-

  frame for only one frame, and we now update the rendered

  screen height accordingly. Other ports are still broken.  (anomie)

- Unix/X11: Fixed possible TV mode crash.                   (anomie)

- Fixed OAM reset timing (beginning of V-Blank rather than

  end) for R-TYPE 3 (J).                                    (anomie)

- Unix/X11: Fixed OpenGL target                             (PBortas)

- Unix/OSS: Fixed big endian sound                          (PBortas/ernstp)

- Tweaked the About Dialog so its read-only and no scroll   (funkyass)

Snes9x 1.40

- cleaned up a sound skipping code issue. Same as the

  RTC issue                                                 (lantus)

- re-fixed the invalid BRR header behavior twice            (Lord Nightmare, FatlXception, Mkendora)

- More BS mapping fixes.                                    (The Dumper, MKendora)

- Fixed Ranma Bun no 1 - Chonai Gekitou Hen (J) and

  Street Combat (U). Interlace is not supported in the

  non-Hi-res modes, as far as I can tell.                   (MKendora)

- Also fixes Maka Maka (J). Frank Yang's report, and

  anomie's code both provided clues to this one.

- Removed special casing on setting 5c77 version to one.

  This seems to be true for U and J units always. I need

  it checked out on PAL...                                  (neviksti)

- Using SNEeSe's values for 5c78 and 5A22. Note we know

  that the 5c78 version can also be 1 or 2, instead of 3.   (TRAC, neviksti)

- Added turbo buttons. Credit/blame for the design goes

  to slack, Nave, Gogo, and myself.                         (MKendora)

- fixed a bug in turbo                                      (slack, MKendora)

- Tried merging the behavior of Old $4200 with new $4200    (MKendora)

- Made $4200's return value match what VSMC Explorer

  showed on Fancia's SNES                                   (MKendora)

- Fixed a matrix multiplcation bug in ZSNES state loads     (MKendora)

- Fixed Dezaemon and Ys3 mode 7                             (lantus)

- Fixed H-DMA modes 5-7. Thanks to The Dumper for the

  extra motivation needed. GunForce and Genocide 2 work.    (The Dumper, MKendora)

- Fixed BG3 Priority. I'm stupid. anomie had fixed it,

  but lantus fixed it again, because I didn't use it.       (anomie, lantus)

- Added a Star Fox 2 hack, and an interleave skip           (The Dumper, lantus, MKendora)

- Cleared BS setting on load                                (lantus)

- Fix for Mode 7 priorities. fixes F-1 Grand Prix (all 3)   (anomie)

- JANJYU GAKUEN 2 needs Multi-tap 5 off.                    (Frank Yang, MKendora)

- HONKAKUHA IGO GOSEI: No multi-tap 5, allow mouse          (lantus, MKendora)

- Added a few missed conditional compiles                   (Nach)

- disabled multitap 5 by default, added menu to enable      (MKendora)

- special thanks to anomie and lantus. One of them is

  responsible for a bug fix I forgot already.               (anomie, lantus)

- Removed several Multitap5 disable hacks.                  (MKendora)

- Added an SPC dumping upgrade from kode54                  (kode54)

- cleaned up some resource leaks                            (MKendora)

- I forgot this since 1.39mk, but SPC700 flag fixes         (anomie)

- Mode 7 interpolation screen flip fix                      (anomie)

- Updated SPC7110 code a bit, for compatibility             (Daniel, anomie)

- Changed RTC saving. (Byte exact to old format on Win32)

  The submitted patch for "safety" doubled the file size,

  so I had to write it in explicitly little-endian.         (MKendora)

- Removed the old hidden cursor                             (MKendora)

- Applied a WAI correction from anomie.                     (anomie)

- Added a patch for Pseudo hi-res                           (anomie)

- Hacked around Word writes to $7F:FFFF. Thanks to lantus

  and The Dumper for verification.                          (MKendora)

- PPC compile fix? and debugger reversion                   (anomie)

- Set defaults differently to improve sound quality.        (MKendora)

- Clear Force load settings after Init                      (lantus)

- Made menu reset a soft reset. Fixed BL Sound Test & more  (CaitSith2)

- Fixed word writes to block bounds in asm core.            (MKendora)

- redone version of my bounds fix, only this one WORKS!     (TRAC)

- Thanks to TRAC for the AT&T syntax refresher!             (TRAC)

- Fixed screen saver disable                                (kode54)

- Fixed OAM and sprite priority in the asm core             (anomie)

- Proper Interlace fix for mid-frame changes                (anomie)

- Fixed OpenGL to accomodate previous patch                 (MKendora)

- Ported the "Settings" dialog to VC                        (MKendora)

- Fixed ROM Info bugs                                       (_pentium_five, MKendora)

- Fixed non-stretched interlacing, but it's s.l.o.w.        (anomie)

- Superscope and Mouse need to be enabled by the menu.      (MKendora)

- Fixed HiROM sram reads in asm and C cores                 (anomie, MKendora)

- Added Company 48 to the list. Thanks to _pentium_five_    (StatMat)

- Set Super Drift Out's S-ram correctly.                    (Snes9xppSE Team)

- Fixed NTSC timing. Helps ToP Intro greatly                (kode54)

- Added several entries to the company list, from uCON64    (Nach)

- Lots more companies                                       (StatMat, Nach)

- Fixed Win32 Superscope support (NT kernel only?)          (MKendora)

- Added ZSNES OBC1 code ported from asm to C                (sanmaiwashi)

- Implemented Justifier emulation                           (neviksti, MKendora)

- Fixed Rudora no Hihou's clip window bug                   (anomie)

- Fixed Flintstones sprite issue                            (lantus)

- Fixed sram mappings for Big Sky Troopers and

  Taikyoku - IGO Goliath. Both map in bank F0               (MKendora)

- Fixed a possible crash when switching audio settings      (MKendora)

- Added per-pack gfx pack configuration                     (MKendora)

- Fixed glitches in DSP-1 games (Flintstones fix)           (lantus)

- Added delay to Superscope latching. Fixes X-Zone.         (neviksti, MKendora, zones)

- Added DSP-2 support                                       (Overload, The Dumper, Lord Nightmare,

                                                             MKendora, neviksti)

- Fixed Super Bases Loaded 2 (and J/K ports) DSP-1 seems

  to ignore the A15 line in LoROM maps                      (MKendora)

- Corrected $4200 again                                     (The Dumper)

- Corrected $2100, $2102, and $2102 read behavior           (anomie)

- Fixed Cancel on the Sound Options dialog.                 (MKendora)

- Fixed the sound options dialog (Thanks, Quattro)          (MKendora)

- updated DSP-1 support to match chip better                (Overload, neviksti, The Dumper)

- added a few Ops to the DSP-4 routine (Nothing plays yet)  (neviksti, The Dumper, Overload, MKendora)

- added screenshot support                                  (anomie, sanmaiwashi)

- stubbed the ST010 chip in Exhaust Heat 2                  (Overload, MKendora)

- hacked around War 2410's lockup                           (pagefault, _Demo_, MKendora)

- updated tests for type 1 ROMs (based on reset vector)     (MKendora)

- Emulation mode CPU fix                                    (The Dumper)

- Open Bus fixes                                            (anomie)

- Better Expansion port emulation                           (anomie)

- More Open Bus fixes                                       (Overload, anomie)

- HDMA fixes (fix colors only in Full Throttle Racing)      (anomie)

- Migrated DKJM2 onto the Tales map                         (MKendora)

- Tried to remove Dragon Knight 4 hack (LoROM sram fix)     (MKendora)

- Fixed ROM Mirroring for LoROMs (<= 32 Mbit)               (MKendora, TRAC)

- blocked wram to wram DMAs                                 (neviksti)

- fixed HiROM mirroring, too. Thanks TRAC!                  (MKendora, TRAC)

- fixed C core RMW and Push ops to write in the correct

  order, fixes Michael Jordan gfx.                          (anomie, Overload, MKendora)

- set RDIO to start as 0xFF, fixes SuperFx games.           (anomie, Overload)

- New connect dialog                                        (funkyass)

- better conditional compile of FMOD                        (funkyass)

- fixed screenshot code when libpng is not used             (funkyass)

- added portability fixes                                   (zones)

- fixed asm Pushes                                          (anomie)

- fixed asm LoROM s-ram decode                              (MKendora)

- migrated DEZAEMON to standard LoROM map                   (MKendora)

- fixed the Madara 2 OpenGL bug (key found in Rudra)        (MKendora)

- fixed asm RMW instructions                                (MKendora)

- fixed ADC opcode                                          (The Dumper)

- added DSP-2 Op09                                          (The Dumper)

- updated C4 C code                                         (anomie)

- updated C4 asm code                                       (Nach)

- Keep OpenGL in ratio                                      (kode54)

- Replaced many more Borland dialogs                        (funkyass, MKendora, Nach)

- Added CRC32 to displayed ROM Info                         (Nach, MKendora)

- Fix cheat support                                         (The Dumper)

- improved DMA timing                                       (MKendora, Overload, The Dumper)

- Fixed Mode 7 math, removed Dezaemon, Gaia, Ys 3 hacks     (TRAC, MKendora)

- Mode 7 flip fix                                           (TRAC)

- Multiple safety and initialization fixes                  (zones)

- Platform safety fixes                                     (PBortas)

- Memmap cleanups                                           (MKendora)

- More preliminary work on special chips                    (The Dumper, Overload, MKendora)

- Added color coding                                        (MKendora)

- Another HDMA fix                                          (anomie)

- added another known hack to the hacked games list         (Nach)

- ToP memmap changes                                        (MKendora)

- Checksum calculation changes                              (MKendora)

- Special cased a few games for OAM issues                  (MKendora)

- Reverted OAM reset to 1.39 timing                         (MKendora)

- Reworked vram wrapping                                    (zones, Mkendora)

- Fixed $4210 and Super Professional Baseball 2             (Overload, MKendora)

- Fixed APU RAM init                                        (Overload, MKendora)

- More support for Exhaust Heat 2 (not playable)            (The Dumper, Overload, neviksti)

- removed some debris from save states                      (MKendora)

- fixed? Doom's save state bug                              (MKendora)

- simple overdump detection warning                         (MKendora)


- Fixed the RTC detection. FINALLY done correctly           (lantus, MKendora)


- neatened up the company table.                            (MKendora)

- fixed a mistake in the ROM Info box                       (MKendora)

- Added a Calulcated Size field to ROM INfo.                (MKendora)

- Added 3 more companies to the ROM Info table              (MKendora)

- Fixed BS detection                                        (The Dumper)

- Added a Legend-specific hack to get sound. I remembered

  it being mentioned in the changelog.                      (Gary Henderson)

- Unbroke the Star Ocean special cases                      (Trigger of Time, MKendora)

- Company 255 is not Hudson-ZFE detects all Hudson games

  without it, except a corrupt dump                         (StatMat, MKendora)

- fixed a bug in the redone detection for the SPC7110       (CaitSith2)

- 44Khz sound should be 44.1Kz. Changed, though you'll

  need to re-set 44.1Khz to make it take effect. Not sure

  if this affects non-Windows ports.                        (MKendora)

- Added 32Khz playback                                      (MKendora)

- Inproved BS ROM mapping                                   (_Demo_, The Dumper, MKendora)


- Honkaku Syogi Fuunji Ryuou (J) fixed (force no multitap)  (Frank Yang)

  Also Fixed Super Castles (j).

  Also fixed a bunch more. This dude e-mailed like 100 bugs

  to my hosts, some already fixed in Snes9x1.39mk2, but

  about 7 were clearly multi-tap5.

- also fixed Dekitate High School. Error was in Japanese    (Frank Yang, Tomato)

- fixed 2 memory leaks                                      (Aaron)

- Dai Kaiju Monogotari 2 works as a 40 Mbit ROM.            (MKendora, The Dumper)

- Fixed the Flashback bug. Lots of info led to this.        (neviksti, MKendora)

  Thanks neviksti, The Dumper, TRAC, and FatlXception

  for clarifying the behavior.

- Fixed Sailor Moon Fuwa Fuwa Panic 2 to work with          (neviksti, MKendora)

  previous fix. It's a total hack, but it should sound

  just like the old Snes9x did. neviksti strikes again!

- Dirty hack to make 3 games deinterleave properly:         (MKendora)

  Wizardry 4, Mark Davis, and Honkakuha Igo Gosei(FX)

  all work as well as the deinterleaved counterparts.

  (The last is a hacked game, and you should get the

  non-FX version)

- Fixed Seima Jyuden Beasts and Blades. Another Multitap,   (Frank Yang)

  but for some reason, the hack requires the C cpu core.

  Thanks to Tomato for taking a stab at the error message,

  as well. It was too vague to be of use, he said. I

  just tried it because it worked on other games.

- Res Arcana fixed. Another Frank Yang report, another J    (Frank Yang, MKendora)

  error, but I can read kana well enough with a table!

- Removed a Terranigma specific hack. Not sure, but the     (anomie)

  new behavior might have fixed Tin-Tin in Tibet's colors.

- Dirty hack to work around a dirty hack. Both Yoshi's      (MKendora)

  Island (E) dumps should work now

- Added the JumboLoROM memory map, Extends LoROM support    (The Dumper, neviksti, MKendora)

  to 48+ Megabits.

- added an EXTBG fix, since iirc, TRAC is using it as well  (anomie)

  Does it actually fix anything?

- Fixed crash in DSP Op06                                   (The Dumper)

- Fixed a GUI error on my part                              (Trigger of Time)

- Cleaned up some of the SPC7110 detection/size code.       (MKendora)

- Merged in XBox port changes to SPC7110 code               (lantus)

- Added a call to Memory.Deinit when exiting.               (lantus, MKendora)

- Many memory leaks fixed while chatting with lantus        (lantus, MKendora)

- Fixed that stubborn open/close leak                       (lantus)


- hacked in Shien's Revenge                                 (anomie)

- fixed Orge Battle's green lines. (CPU source for DMA)     (anomie)

  - Looks interesting, and might apply to other DMA cases?

- maybe "fixed" DKC's barrels? by treating $2001

   as unmapped. The game worked before with a hack.         (MKendora)

- optimized SPC7110 slightly by removing extra setup work   (MKendora)

- Fixed DBZ 3 (Korean). S. Korea is, in fact, NTSC.         (MKendora)

- Fixed a hard-coded value in the SPC7110                   (MKendora)

- Added a Win port ROM Info dialog                          (MKendora)

  - some companies aren't in the table I used.

    If you encounter an Unimplemented company,

    report it the the Snes9x development forum, with

    the correct company and the number.


- SPC7110 support based on Dark Force's docs.               (Dark Force, zsKnight,

                                                             The Dumper, MKendora)

  Trust me when I say those guys deserve the credit more

  than me. From what I'm told, Dark Force is the man

  behind most of the reverse engineering, but they all

  did a much harder bunch of work than I did following

  their specs. It's plain and simple that these three

  are the masterminds behind all SPC7110 support.

  Dark Force for reverse engineering the chip (Extremely tough work!)

  zsKnight for the original core, and probably other things

  The Dumper for dumping the packs and doing hardware tests.

  Also thanks to CaitSith2 for numerous bug reports

  and a lot of bug fixes.

- Theme Park hack removed, fixed via PPU latching           (anomie, MKendora, TRAC)

- WWF Wrestlemania hack removed            (anomie, TRAC)

- Strike Gunner hack fixed            (anomie, MKendora, TRAC)

- FF:MQ text fixed. May help other sprite issues.           (TRAC)

- Umi Hara Kawa Se timing corrected.                        (anomie)

- S-DD1 packs load by the same rules as ZSNES               (MKendora)

- SPC7110 code builds in linux                              (Lord Nightmare, zinx)

- Added The Dumper's DSP-1 updates                          (The Dumper)

- SPC7110 is correctly displayed on load, RTC also noted.   (MKendora)

- Fixed a potential graphics problem                        (TRAC)

  no known games fixed, but who knows?

- Fixed Ballz3D                                             (pagefault)

- Re-fixed Ballz3D, via DSP op 0F                           (The Dumper)

- included some of anomie's fixes. Many caused me grief,

  so only Marko's Magic Football is intentionally fixed.    (anomie)

- finished zsnes save support, though I don't know how

  well it will work with SPC7110 games                      (MKendora)

- Added a new soundux.cpp again to fix some noise.

  (Fixes the GW "fart track")                               (Lord Nightmare, info from Anti-Res)

- Added 3 cache modes for SPC7110 games                     (MKendora)

- Added new BRR decoder. Requires sample caching

  and the Anti-Res decoder be disabled.                     (FatlXception, port by Lord Nightmare)

- Added CaitSith2's RTC debugger. define RTC_DEBUGGER in

  project settings to enable it.                            (CaitSith2)

- SPC7110 per-game cumulative logging                       (MKendora)

- other fixes that I've forgotten                           (sanma iwashi, TRAC, anomie, ????)

- "I'm not worthy" thanks to the original SPC7110 crew (DF, zsKnight, and the Dumper)

- Thanks again to the same people, because they deserve it!

- thanks to The Dumper, Dejap, TRAC, and all the ZSNES crew for technical assistance

- Thanks to most of the Snes9x mods for testing (no thanks to you, Raptor ;)

- and thanks to TRAC and #mkendora for letting me vent at you.


- Added SDD-1 unknown graphics data logging at the dumper's request. A bit late

  but might help with Street Fighter 2 Alpha's data dumping. Creates a

  romname.dat file in the freeze file folder.

- Implemented 16-bit texture support for OpenGL modes in Windows and Linux.

  Had to support a new pixel format type to do it - RGB5551 (one bit of alpha)

  which caused me some major problems - black was no longer always pixel value


- Removed the Bump map OpenGL mode from the Windows port (didn't look so good

  anyway and was slow).

- Added a hidden novelty OpenGL mode (clue: a keyboard shortcut activates it)

- Reverted back to FMod version 3.20 after reports that version 3.33 broke

  AD3 support.

- Implemented a better work-around for the broken select system call in the

  Linux kernel - the original work-around was long-winded and stopped working

  when I implemented OpenGL support under Linux.

- Added the same speed-up hack to the OpenGL code that the Glide code already

  supported. Basically, if your OpenGL implementation supports 16-bit textures

  then OpenGL mode should be as fast, or faster than the 3dfx Glide mode.

- Hopefully fixed Glide support.

- Reverted back to the original colour blending code. The newer code, although

  more accurate in most cases, had too many glitches and was slower.

- Included multiple Japanese games fixes from Iswashi San.

- Fixed a timing problem caused by a speed up hack that was affecting Top Gear

  300. No the game still isn't playable yet, but I noticed the problem while

  investigating the DSP-4 chip used by the game.


- Added support for Star Ocean and Street Fighter 2 Alpha decompressed graphics

  packs from dejap. Used a binary chop search rather than a linear search to

  locate correct decompressed graphics more quickly - should help emulation

  speed during later stages of the game.

- Included OpenGL support into the Linux port and speeded up the Windows OpenGL

  implementation slightly. The real speed up would occur if I could figure out

  how/if 16-bit textures are supported in OpenGL because at the moment the

  16-bit software rendered SNES image must be converted to 24-bit before being

  uploaded as a texture...

- Included the latest ZSNES DSP-1 code. Now Pilotwings, SD Racer and Suzuka 8

  Hours are playable. Aim For The Ace, Super Air Diver 1 & 2 and Syutoko Battle 94

  are also playable, but with bugs. Thanks to zsKnight, _demo_, et al for all

  their hard work.

- Another Daffy Duck: Marvin Missions screen flicker problem worked around -

  writing to the IRQ enable register shouldn't clear any pending IRQs, but

  Sieken 3 seems to require this or else the game hangs. Special-cased Daffy

  Duck for now.

- An NMI emulation bug was triggering a Panic Bomberman World game bug,

  crashing it. Basically, if a game enables NMIs after the normal trigger

  point, the NMI should not trigger if the game has already read the NMI clear


- Panic Bomberman World requires SPC700 memory to be initialised to zero on

  reset otherwise the game hangs when a tune finishes and another one should


- Added mouse pointer auto-hide to the Windows port. Much better than the turn

  the mouse pointer into a black dot method I was using before.

- Included the latest ZSNES Super FX code. Not sure if it fixes actually fixes

  any games.

- Added an offset hack for Strike Gunner to get the scrolling ground layer

  to line up correctly - another offset-per-tile bug hacked around for now.

- Arrr! Left in some debugging code in the last release that prevented all

  games that need the slower SPC700 timing from working. Removed it.

- Hmm. The broken cut-scenes in Deep Space 9 seem to indicate that I haven't

  got the emulated clock speed of the 65c816 CPU correct yet. And not by a

  little bit - a 9% too slow error. Hacked special timing for the game for now.

- Added triple-buffering to Windows port - enabling double-buffering actually

  enables triple-buffering if you have enough free video RAM, defaulting to

  double-buffering if you don't.

- Fixed another crash bug in the interpolated mode 7 code - if no scaling

  was being used (either up or down) and screen repeat was enabled and the

  screen was flipped horizontally, the routine would crash Snes9x. Was causing

  Snes9x to crash during rock monster boss stage of Castlevania 4.

- Oops. Got the initialisation of the default SNES screen width and height

  round the wrong way - could cause a X Windows System error message on the

  UNIX port after loading a ZSNES freeze file.

- Included the unofficial Windows port emulation fixes for several games including

  Kentouou World championship and TKO Super Championship.

- Included Iwashi San's improved Anti Res. sound sample decoding routine and

  updated the C version to match.

- Included Anti Res. improved sample decompression code he sent me ages ago,

  but for some reason I didn't include. Sorry. This version seems good enough

  to leave enabled all the time.


- Added fix for Captain America's corrupt graphics - a ROM bug causes it to

  read from what I thought should be an unmapped memory area, but it expects

  the value returned to be zero.

- Added code to support games that switch to the hi-res. SNES screen mode part

  way down the screen while using the 3dfx bi-linear filter mode. The code

  basically has to back out of the speed up hack it was using when the game

  switches resolutions.

- Fixed support for games that have mixed lo-res. (256x224), medium res.

  (512x224) and hi-res. (512x448) all on the same screen - corrects the display

  of Majin Tensei 2.

- Added support for games that use sub-screen addition to the back-drop layer

  while displaying hi-res. graphics - something I thought the SNES couldn't do

  but the game Marvelous uses this.

- Reworked the UNIX/Linux output image handling code: the image doesn't always

  have to be scaled when hi-res. support is enabled, the PutImage operation

  only updates the area of the screen it has to, the SNES image is now always

  centred in the window/full-screen area and if the SNES image changes size

  between frames, the old screen areas are now correctly cleared.

- Fixed the corrupt graphics problem during the battle scene of Last Bible 3 -

  it requires that previously unknown DMA mode 5 should just act the same as

  DMA mode 1.

- Fixed a nasty bug when H-IRQs were being reused on the same scanline - a logic

  bug could cause H-DMA processing for that line to be skipped. Was causing

  the bridge and the start banners to be the wrong colours in Top Gear 2.

- Added Kreed's display processing modes to the Linux port, including his new

  asm version of the Super2xSaI mode and the new software bi-linear filtering


- Think I might have figured out the odd Mode 7 glitch problems the games

  Illusion and Gaia and Chase HQ were having. My original fix was to mod the

  centre X & Y values with 1024, but looks like the true fix is to mod

  X + horizontal offset and Y + vertical offset with 1024 when screen wrapping

  is enabled.

- Disabled H-DMA'ing into V-RAM via registers 2118/2119. The game Hook

  deliberately does this causing graphic corruption while dialog boxes are

  displayed. Maybe the real SNES disallowed this and it was left in the game by

  mistake? Not sure what effect the game was trying to produce because

  disabling the emulation of this feature doesn't seem to affect the game at

  all, other than stopping the corruption.

   + Also fixes graphics junk problem on first screen of Bugs Bunny.

- Added a 'region-free' timing hack for Power Rangers Fight - without it the

  NTSC version was displaying badly glitching graphics; I'd already fixed the

  PAL version.

- Added true priority-per-pixel mode 7 support (the previous support was just

  a hack to get the colours correct) - level 2 of Contra 3 used this feature.

- The Japanese, German, French and Spanish version of Illusion of Gaia needs the

  slow SPC700 timing.

- Deleted the Breath of Fire 2 S-RAM hack for the hacker intro version -

  according to reports it was causing problems for the non-hacked version.

- Legend, the PAL version, never sets the sound master volume control - Snes9x

  was defaulting this to off, I guess the real SNES must default it to full

  volume; changed Snes9x. The NTSC version of Legend does set the master

  volume level, but sets it to off just after the title screen. Hmm. The -nmv

  command-line switch allows you to hear sound in this version.

- Panic Bomber World was tripping an SA-1 emulation bug - the WAI instruction

  emulation code was setting the 'waiting for interrupt' flag on the wrong CPU

  causing the main SNES to skip an instruction when the next interrupt occurred.

- Panic Bomber World, Bomberman 4 and UFO Kamen Yakisoban all need the slower

  SPC700 timing.

- Oops! The Super Formation Soccer 95 fix was causing Aero 2 to lock up. This

  means I have no no idea what value the DMA in progress register should

  represent. I've hacked it and made it toggle between 0 and $ff on each read

  which gets both games working, for now...

- The ROM de-interleaving code always assumed the blocks were rearranged based

  on a power of two, but Francois found a copy of Soldiers of Fortune where

  this was not the case. Corrected the code.


- Finally worked out why the menu items weren't being highlighted in several

  ROMs, including Battletoads, U.N. Squadron and All Japan Pro Wrestling.

  Two problems: its seems the SNES does halve the colour value result when

  blending colours when only the fixed colour addition/subtraction is enabled,

  but doesn't halve the result when sub-screen is being blended and its a clear

  part of the sub-screen. The second problem was that I had an optimisation

  that prevented the time consuming colour blending code from being called if

  the colour being added/subtracted was black - adding zero to a number doesn't

  affect the result, but not performing the side-effect of halving the result

  does affect the final value...

- Super Formation Soccer 95 requires that the DMA enabled register doesn't

  always return zero, otherwise the game locks up.

- Thanks to several people reporting a screen flickering problem in the

  pseudo 3-d section of Jurassic Park 2 I've fixed a nasty problem in H-IRQ

  handling code which could cause double-triggers or skip IRQs altogether.

  With this fix I can now remove the special hacks for Ninja Warriors Again,

  Chuck Rock and F-1 Grand Prix.

- More games needing the slow SPC700 timing:

  Zennihon Puroresu 2, Soulblazer and Robotrek.

- The CPU idle time skipping code was skipping cycles during a software delay

  loop in Itchy and Scratchy, causing screen flicker.

- Looks like reading the value of register $2137 shouldn't clear a pending

  IRQ - was causing screen flicker on Yoshi's Island.

- Actraiser 1 & 2 both need the slow SPC700 timing.

- Terranigma reads a sound channel's current sample output value and waits for

  it to be zero before preceeding. I forgot to always return zero when a

  channel was silent. This mistake was causing the game to lock up.

   + Itchy and Scratchy and was causing the music to stop and samples to be cut

     short in the Mario Early Years series.

- Added a hack for Secret of the Evermore - at several points in the game, just

  as the plane is about to land, it reads from unknown registers $4000 and

  $4001 and, if it doesn't get the value its looking for, the game hangs or

  displays corrupt graphics.

- Silva Saga 2 was accidentally triggering a colour blending hack I put in

  place Kirby Dreamland 3 and Kirby Superstar.

- The ZSNES freeze-file loading code could leave a file open if the file wasn't

  a valid ZSNES freeze file.

- Super Punch-out requires certain DMA registers to be updated after the DMA

  completes. Snes9x used to do that, but I must have accidentally left the code

  commented out whilst investigating a different problem in another game.


- Added a recently played game list to the Windows port File menu so you can

  quickly load up your favourite games.

- Included IPS patching support based on code from Neill Corlett - just rename

  the patch file to match your ROM image name but with a .ips extension and

  copy it into your ROM or freeze-file folder.

- Added John Weidman's and Darkforce's S-RTC, (Real Time Clock) emulation code.

  The only game that seems to use it is Dai Kaijyu Monogatari II.

- Included code from Nose000 for games with 128Kbytes of S-RAM. Now

  Sound Novel-Tcool, Thoroughbred Breeder 3, RPG-Tcool 2 and Dezaemon are


- The Windows port now has an option to make the 'turbo speed' button a toggle


- The optimised fixed colour addition/subtraction code was ignoring the colour

  window. Thanks to John Weidman for pointing this out.

- Added mode 7 and hi-res. hack for Dezaemon from Nose000 - the mode 7 hack

  looks interesting (to me); I wonder if some other games would benefit?

- Both Tales of Phantasia and Star Ocean need custom sound CPU timing. Hmm.

  That's 4 ROMs now, there will be more... That means I still haven't

  discovered all the major SNES timing quirks. :-(

- Windows port now has an option to save the S-RAM data at any time.

- Windows port saving SPC dumps now auto-increments the filename.

- Added work-around for a Super Robot Wars Ex ROM bug - the game was checking

  the wrong PPU register for end of h-blank. The game must have only worked by

  chance rather than by design on a real SNES.


- Corrected the colour addition/subtraction and halve the result code not to

  halve the result when only the fixed colour is used, i.e. the sub-screen is

  clear. Discovered and fixed this awhile ago, but I accidentally reintroduced

  the bug when adding some optimisations a few versions back.

- Finally cleared the last of the offset per tile background mode bugs. There

  was something odd about the tile at the left-hand edge of the screen that I

  couldn't figure out - well now I have. Yoshi's Island level 6 boss screen,

  Mario RPG mine cart screen and Jim Power title screen now all display


- Made reading blank areas of the SNES memory map return the middle byte of

  the address - fixes Home Alone which tries to execute code in an empty part

  of its memory map but only works because the real SNES seems to return the

  middle byte of the address - $60 in this case, which corresponds to the

  ReTurn from Subroutine instruction.

- Added auto-cycle skipping disable for Earth Worm Jim 2 and several other

  games that spool sample data using H-DMA as the sample is being played.

  Improves some sound effects in these games.

- Fixed joy-pad routines to only report up or left if down or right are also

  pressed respectively. Works around a game bug in Empire Strikes Back in the

  asteroid stage where the game crashes if both left and right are pressed -

  something impossible to do on the original SNES game-pad.

- Added custom SPC700 timing for Rendering Ranger R2 - the game now works with

  full sound. No idea why it needs custom SPC700 timing.

- The ROM type detection was broken for Treasure Hunter G and Test Drive 2 -

  fixed the code so type 2 ROMs can be LoROM.

- Adjusted the main CPU cycles per scan-line from 341 to 342 to give an exact

  match for the timing required for Earth Worm Jim 2. All EWJ2 needs now

  for perfect sound emulation is a method of synchronising the emulation

  speed to the host hardware's sound card playback rate, oh, and a fast CPU!

  The Linux port already has this but seems to be broken because games

  play at double-speed when this option is enabled.

- Some SPC700 code in Earth Worm Jim 2 seemed to prove that I had guessed the

  clock speed of the SPC700 sound CPU incorrectly - out by almost a factor of

  two, in fact. Changed the relative emulated clock speed of SPC700. Now

  Chrono Trigger doesn't lock up at certain points anymore, the special SPC700

  timing for games written by the Human Software company isn't required and

  you can hear some more of the sound samples in Earth Worm Jim 2, etc.

- H-IRQ triggering code was broken - if a ROM turned on H-IRQ but later turned

  it off, Snes9x could continued to generate H-IRQs, crashing some games.

- Added a generic test for Human Entertainment games - they need special

  sound CPU timing to work. Gets Taekwon-Do working.

- Disabled offset-per-tile mode for Theme Park; the world map screen is corrupt

  with it enabled.

- Yet more changes to the offset-per-tile backgrounds modes 2 and 4. Added

  64 tile wide screen support for Mario RPG's mine cart ride and fixed multiple

  bugs with the handling of horizontal offset-per-tile used in Chrono Trigger's

  fade in of the space ship.

- New feature: Snes9x can now load ZSNES freeze state files! Just copy them

  into the freeze file folder and Snes9x will load them when you load a freeze

  file, but only if the corresponding native format Snes9x freeze file doesn't


- Added memory map hack for Batman - Revenge of the Joker: its ROM header block

  is in the wrong location and Snes9x incorrectly detected its ROM type.

- Fixed an off-by-one-pixel clip window 2 bug when the window was set to clip

  outside the window area; clip window 1 was already correct. Removed the bright

  line bug at the left edge when the combat screen is appearing in Starfox and

  the clip problem when text boxes zoom-out in Yoshi's Island.

- Jim Power's title screen seems to prove that the per-tile offset data on

  mode 2 isn't ignored for the left most tile as I originally thought.

  Modified the code.

- The recent timing changes highlighted another problem with Daffy Duck -

  changed IRQ enable register to only clear pending IRQs if one has been pending

  for several microseconds.

- Speeded up the sprite data register handling slightly.

- Finally got Aero the AcroBat 2 working, after many hours of investigation,

  spread over several years - literally! Two problems. The SNES doesn't seem

  to consider scan-line line zero to be part of the v-blank period even though

  the line is never drawn and V-IRQs at the start of the scan-line have to be

  delayed until a few microseconds into the line - Traverse: Starlight & Prairie

  required this as well, so I removed the original, Traverse specific hack.

  There's a problem with the in-game music that I'll investigate at a later


  - The in-game music problem just required ENVX emulation to be switched on,

    off by default on the Linux port, on by default on the Windows port.

- Fixed the mode 7 corruption problem on the title screen of Chase HQ using the

  same trick as Illusion of Gaia - i.e. mod the mode 7 centre X & Y values with


- Fixed another crash bug in the interpolated mode 7 code - a portion of

  the code was ignoring the screen flip value and the fact that X render

  direction reversed if the screen was flipped horizontally. Was causing a

  crash on the whale boss screen of Kirby Superstar.

- Mortal Kombat 3 now auto-adjusts emulated cycles per scan-line work-around

  a speech sample being cut short.

- Added sample data register reading support to the sound DSP - somehow I

  seem to have missed implementing this. Not sure if any ROM actually reads

  the value.

- Followed Sumire Kinoshita's suggestion and stopped clearing the ENDX flags

  when the value is read, against my better judgement, and it does actually

  improve speech samples in several games. Ooops! The Mortal Kombat series,

  Magical Drop 2 and Metal Combat are the ones I've discovered so far.

- WWF Arcade now auto-adjusts the cycles per scan-line value to work-around

  a sound sample repeat problem.

- Hmm. There's something about offset-per-tile mode I don't understand - WWF

  Wrestlemania Arcade is getting corrupt graphics; not sure what effect the

  ROM is trying to produce. Disabled offset-per-tile mode for the game for now.

- Fixed Street Racer player 1 wobble problem during the soccer game by auto-

  adjusting the cycles per scan-line value slightly.

- Made Power Rangers Fight auto-adjust emulated cycles per scan-line to work

  around a slight timing problem that causes an NMI to corrupt register

  values that an IRQ handler is trying to update. Without it the scrolling

  back-drop and fighter graphics are corrupt.

- Illusion of Gaia seems to need the mode 7 centre X & Y values to be mod 1024

  if the screen repeat flag is set. Fixes the island fly-over bug right at

  the end of the intro but breaks a few other games. Hmm. Made it auto-switch

  on for this game only.

- Added memory map support for Radical Dreamers. Thanks to satellite hut master

  for the information.

- Made updates to the top bit of the sprite write address register be ignored

  unless the low byte had been written to first. A ROM coding bug in

  James Pond II requires this, otherwise it writes a junk byte value into the

  main character's X position and Robocod wobbles around all over the place.

- Reverted back to pre 1.31 way of initialising unknown register values -

  Rock and Roll Racing was reading a junk register value and using the value

  to set up DMA, which in turn was causing corruption on the player select


- Added Star Ocean memory map - thanks zsKnight! The original ROM I was testing

  was corrupt, no wonder I couldn't figure out the memory map myself! The game

  still isn't playable, though, due to missing S-DD1 graphics decompression

  (+ encryption?) emulation.

- Started to dump some compressed data values from Street Fighter 2 Alpha in

  the hope that one day someone will be able to crack the S-DD1's compression



- C4 emulation wasn't being automatically enabled for Rockman X2 / X3 - the

  Japanese versions of Megaman X2 / X3.

- Fixed the Super FX plot table pointer that I accidentally broke while saving

  1Mb of workspace RAM - it was stopping all Super FX games from working.


- Noticed another problem with the CPU_SHUTDOWN code - Chrono Trigger locked

  up during the intro but only when using the asm code CPU core. Found the

  algorithm difference between the code and made the CPU match what the C

  version was doing. Still not sure why it caused a problem in the first place.

- Changed colour subtraction code to use Lindsey Dubb's newer version he sent

  me some time ago but I 'forgot' to include. I say forgot, but I really put

  off including it because, although it improves most games that use the

  effect, it does result in one or two slight visual glitches.

- Hacked in zsKnight's C4 emulation asm code - now both Megaman X2 and X3 are

  playable. Still got to complete the reverse engineering of the i386 asm code

  to C so other, non-Intel ports can have C4 emulation.

- Shuffled the keyboard mapping a bit on the Linux port so now Tab key acts as

  an emulation speed turbo button, `, # and ~ act as superscope turbo and

  / acts as the superscope pause button.

- Fixed asm CPU_SHUTDOWN code that I accidentally broke while trying to

  optimise it! Thanks to all the people who noticed Snes9x's frame skipping

  had changed between releases. Frames rates should be improved again for more

  than 50% of games.

- Re-enabled in-lining of the C SNES memory access routines, improves frame

  rate by one or two on slower machines.

- Optimised the asm 65c816 addressing mode emulation code a little.

- Included some code changes making life easier for the Mac porter, John Stiles.

- Added memory map support for Sufami Turbo using information supplied by

  Nose0000. No idea if it works because I don't have the ROM.

- Spent a few minutes trying to figure out the Star Ocean memory map so at

  least the sound effects could be heard. But gave up after a couple of hours

  due to laziness. If anyone knows the memory map details, let me know please!


- The delay loading of the OpenGL DLLs on the Windows port was causing the

  OpenGL initialisation code to fail. Reverted back to normal DDL loading but

  with the side effect that Windows 95 users must visit the Microsoft web site

  and download the OpenGL add-on before Snes9x will work for them.

- Corrected the OpenGL bump-map display option - my attempt to get the

  bi-linear OpenGL display option to work with Voodoo card's limited texture

  size had broken the bump-map mode.


- Changed the Windows port to delay load the two OpenGL DLLs, so now they're

  only loaded if you switch to OpenGL mode. The original version of Windows 95

  didn't include the OpenGL DDLs, so Snes9x wouldn't even start on that

  platform; now it should.

- Added yet another sound buffer option to the Windows port - this time the

  block size of sound data to mix. Some DirectSound sound card drivers only

  report the play position moving in steps rather than continuous amounts and

  Snes9x's default mix block size turned out to be smaller than this step

  value on several cards.

  Snes9x couldn't work out out where the true play position was accurately

  enough resulting in broken, noisy sound output.

- Modified the Windows frame timer code to use semaphores rather than events -

  they should make Snes9x more reliable at not missing frame sync pulses when

  Windows is busy doing background tasks.

- Added SA-1 shutdown code - basically, Snes9x now stops emulating SA-1 CPU

  instructions when the SA-1 enters an idle loop waiting for the main SNES

  CPU to give it something to do. All SA-1 run much faster and smoother now.

- Added multi-axis joystick/game controller support to the Windows port and

  tweaked the dead-zone threshold position a little.

- It looks like the SNES PPU was designed to support 128K of V-RAM but only

  64K was fitted; Snes9x wasn't wrapping all V-RAM address to stay within the

  64K limit causing a corrupt title screen on ReX Ronan - there will be others.

- Added amend functionality to the Windows Cheat Entry dialog and added extra

  text boxes for direct address and cheat value input rather than only being

  able to type in a Game Genie or Pro-Action Reply code.

- BS Suttehakkun2 was crashing just before start of play - the ROM was

  performing a junk DMA that was corrupting RAM, crashing the game when it

  went searching for a particular value.

- F-1 Grand Prix requires IRQ triggering when IRQ scan-line register set to

  current scan line, but Chuck Rock objects. Hmm. Chuck Rock seems to indicate

  the CPU emulation is running too fast, but I can't see where the mistake is.

  Special-cased Chuck Rock for now.

- Optimised SNES DMA handling slightly - copying data to SNES V-RAM is now

  significantly faster.

- Windows Cheat search dialog was ignoring data type parameter in various

  places which was causing problems when larger numbers were being searched


- Forced unknown PPU register reads to always return 0 - a coding bug in

  Equinox shows that this is required. An earlier fix didn't work.

- Puya Puya 2 & remix were objecting to an NMI being triggered when enabling

  NMIs after scan-line 226, but Ys 5 seems to require this. Hmm. Added a hack

  to support both games.


- Snes9x DirectSound code modified - the mixing block size is now always 10ms

  for Windows 95/98/2000 and 20ms for NT 4.x, now there should be no need to

  enable Sync Sound when a large sound buffer is required (helps emulation

  speed). The maximum sound buffer length values have been updated to reflect

  the smaller mixing block size.

- Changed the DirectSound code back to use an offset from the play position

  as the place to write new sample data into the sound buffer - on NT 4.x the

  write position seems to vary randomly rather than being a fixed distance

  in front of the play position as documented. Now I know why I used the play

  position originally!

- Changed the DirectSound code to fill the sound buffer at the write position

  supplied by DirectSound, rather than just before the current play position -

  should help reduce latency.

- Added an auto-detect method for interleaved mode 2 Super FX ROM images -

  well, not really auto-detect: if the game crashes and its a Super FX game,

  Snes9x assumes its in interleaved mode 2, de-mangles the ROM image and tries

  to run the game again.

- Had to update the Snes9x Windows registry version number as the additional

  diagonal settings make old registry settings incompatible.

- Added diagonal keyboard controls to the Windows port, as requested by

  several users.

- Changed PPU code to return zero when reading non-existent registers - the

  game Equinox relies on this due to an original game coding bug.

- Included FMOD sound driver support to Windows port - people experiencing

  broken sound or delayed sound, etc, might want to give it a try.

- Tales of Phantasia - un-interleaved format ROM memory map changes to match

  odd ZSNES format, now the hacked ROM works.

- Changed NMI again. Made reading or writing to PPU register 0x4210

  clear NMI pending flag again, without this Super Tennis does not work.

- Changed NMI timing back to be the same as several versions ago and just

  special cased Cacoma Knight instead - although kept the code to prevent

  the re-triggering of an NNI more than once in the same frame.


- Forgot to force GUI surface to be displayed when some dialogs where popped

  up - problem only happened on full-screen mode with triple or double

  buffering enabled, or when using 3dfx mode. It appeared as if Snes9x had

  locked up, but pressing Esc would pop down the hidden dialog.

- Added a couple of options to the Settings dialog. Now its possible to

  disable S-RAM auto-save which was causing Snes9x to write to the hard disk

  every 30 seconds on some games, causing the occasional skipped frame.

- Fixed Reset option which was accidentally broken when Netplay support was


- Added support for Dirt Racer - it leaves the Super FX chip running all the

  time, so the default CPU emulation method never allocated any time to other

  CPUs and the emulation seemed to lock up.

- NMI timing changed again. Now an NMI can only be triggered once per

  frame and enabling an NMI after the normal trigger scan line triggers

  an NMI immediately. This fixes display glitches in Ys 5, Stargate and

  Daffy Duck.

- Fixed the WAI instruction to only 'wake up' once an actual NMI has

  triggered, rather than just waking up when it should have triggered.

  This fixes Battletoads, broken since version 1.29(ish).

- Changed NMI again. Made reading or writing to PPU register 0x4210 not

  clear NMI pending flag. Seems to allow all the NMI timing sensitive ROMs

  I had on my list to now work without any special hacks. Illusion of

  Gaia now works again.

- Another NMI fix - cleared the CPU pending NMI flag at start of frame;

  Battletoads intro was crashing without this. A long DMA was stopping the

  SNES CPU so it couldn't and shouldn't respond to the NMI signal from the PPU.

- Fixed Netplay problem when game didn't have any S-RAM and Sync Using Reset

  was being used. An error dialog was displayed and the client would disconnect

  from the server.


- The Windows auto-frame skip code was broken - badly. It didn't re-sync a

  timer value with timer events being generated, causing Snes9x to deliberately

  stop and wait for an event when it didn't need to, slowing down the overall

  emulation speed and increasing the number of frames skipped.

- Improved the Windows cheat search dialog - its now possible to compare

  against a value and more comparison functions are available.

- Finally worked out why Voodoo 3 support was so buggy in Snes9x - the Voodoo 3

  card generates a WM_DISPLAYCHANGE message when switching to Voodoo mode (the

  Voodoo 1 and 2 cards don't); Snes9x thought that some other application had

  changed the screen depth or resolution and tried to adjust its window to

  match - triggering another WM_DISPLAYCHANGE message. No idea how the code

  worked at all; it must have been only by chance and very dependant on the

  driver version you were using!

- Implemented Netplay on the Windows port - but its buggy as hell. I seem to

  be having major Windows multi-threading problems. Comments I've seen seem to

  suggest that Windows 95/98 don't implement true multi-threading; hmm...

- Not happy with the current Netplay, so I scrapped it and tried again;

  the protocol is much improved and not using select to control game timing

  seems to have removed lots of the threading-type problems I was having.

- Attempted to switch to just using Borland's C++ Builder to build the Windows

  port - and failed, again. Although C++ Builder can build Snes9x from sources,

  it can't then link in the asm CPU cores. I had hoped Borland might have

  fixed this with their latest release - they haven't.

- Several attempts to get Anti Resonance's super-fast sound CPU and sound DSP

  code working in Snes9x, but all failed. Part of the problem was his code was

  written using TASM and the object files it generated would only work under

  Windows - but all my SNES debugging code was in the Linux port. Anti' fixed

  that, and I then had some success getting his code working, but its just too

  unstable at the moment for a main-stream release.

- Included an option to use Anti Resonance's alternate sample decoding routine;

  it can approximate the wind and noise sound effects heard in several Square

  Soft games.

- Thanks to Lindsey Dubb for the mode 7 bi-linear filtering code - it

  generates a nice smooth image when a game scales the screen using the SNES'

  mode 7, but you'll a fast machine if you don't want the frame rate to drop.

- Thanks again to Lindsey Dubb, he improved the colour addition/subtraction

  subtraction routines - they are just a little slower but now mostly perform

  full 15-bit precision addition and subtraction rather than the previous

  13-bits of precision. Many more colour shades can be seen - look at the

  improved shading on the Mario Kart or F-Zero track for example.

- Added a reverse stereo option, for people with sound cards that swap the two


- Added a sound config dialog to the Windows port - now you can access extra

  sound options that have always been there, but just no GUI interface to

  access them.

- Fixed the 32-bit windowed support on the Windows port.

- Adjusted the NMI timing by a few microseconds to get Metal Warriors working


- Added a few more sound playback rate choices. Most modern sound cards allow

  any value to be used from a large range, rather than just a select few, may

  be I ought to add text field so you could just type a value in?

- Used Factory Setup 4 to build a new installer package for the Windows port -

  just shipping a zip file was confusing novice users and many (mostly AOL

  users) seemed to have an odd program mapped to .zip files, further confusing

  the issue.


- Disabled the SPC700 noise feature simulation used by Chrono Trigger and

  Final Fantasy 3 until I work out why its being triggered by sound effects

  that don't use it.

- Rewrote/reorganised the DirectX and 3D/fx handling code, now both are never

  enabled at the same time in Snes9X. It might fix the crashing problems some

  Window port users are seeing. Changing between DirectX and Voodoo 3D/fx

  modes now requires Snes9X to be restarted.

- Tracked down and fixed the Chrono Trigger black screen problem on the Windows

  port: a rogue asm instruction was left in by mistake after some code edits -

  it was only by chance that the code worked on the Linux port.

- Added some SNES debug options to the Windows port, but disabled by default,

  on the shipped version.

- Clicking on the column headings in the OpenROM dialog in the Windows port

  now sorts by that column; plus added some slight screen update optimisations.

- Added an optimisation to graphics rendering: don't add or subtract

  sub-screen from background layers, or clear the sub-screen, if SNES fixed

  colour is black and no background layers are enabled on sub-screen, even if

  ROM tries to enable translucency effects for every background layer.

  Discovered Sonic was doing this, there will be others.

- Forgot to enable auto S-RAM save on Windows port, oops!


- Warning dialog added to the Windows port - if a ROM is loaded from a

  read-only directory, e.g. a CD, and the freeze file folder is set to be the

  same as the ROM image folder, then a warning is displayed when the game first


- The Windows port now supports 5 joy-pads - Snes9x always did support 5 but

  the Windows port lacked the GUI option to enable and configure it.

- Added an about dialog to the Windows port.

- The Windows port now has a simple settings dialog, only one option so far -

  changing the freeze file and S-RAM save directory; much better than having to

  use regedit at least.

- Added a new cheat search dialog, you can use it to find where games are

  storing life counters, health levels, etc. and then add cheats that stop the

  values from changing.

- Added a cheat code entry dialog to the Windows port; now Game Genie,

  Pro-Action Replay and Gold Finger codes can be graphically entered and


- Added a master cheat codes on/off toggle, available from the Cheats menu

  on the Windows port.

- Extended the number of cheats per game from 10 to 75.

- Changed cheat code to reapply cheat every emulated frame so if RAM is being

  patched the cheat value is continuously applied.

- Wrote some new cheat search code, the code won't be useful until I get around

  to writing a cheat search dialog.

- Added automatic cheat code loading and saving using the same file format as


- Rewrote large parts of the Snes9x cheat handling code ready for adding

  cheat dialogs to the Windows port.


- Added a flag to only enable SPC700 noise 'feature' when Chrono Trigger or

  Final Fantasy 3 are loaded - the conditions that I thought were necessary to

  trigger the feature where sometimes being met by other games.

- Added a simulation of the SPC700 noise 'feature' where some games, notably

  Chrono Trigger and Final Fantasy 3, play samples that deliberately overrun

  outside a 16-bit value, the SPC700 sound DSP then for some reason starts to

  generate a type of noise sound which the games use to generate wind and

  swish type sound effects. Thanks to ZSNES for some of the information.

- Fixed another sound interpolation problem, thanks to Mikael Bouillot -

  the initial value of the sample byte being played was not being set correctly

  when processing fractional offsets.

- Added auto S-RAM save option; S-RAM is automatically written to a .srm file

  a few seconds (30 by default) after a ROM writes to it - useful for people

  who were playing games long into to night, only to lose their progress

  after a power cut or machine crash.

- NMI delay code changed again - the fix for Cacoma Knight was breaking

  Tuff E Nuff; it would seem delaying NMI until the start of h-blank to too

  long, added a cycle counter instead.

- Fixed yet another clip window bug - clip window was being incorrectly set

  at no range if colour window was enabled but background layer clip window

  was disabled (meaning layer should not be clipped).

  Fixes the sunken ship level on FF5.

- Worked out (by example) how to add keyboard accelerators to the Windows port,

  now toggling full screen using ALT+Return works.

- Added mouse-warp to the Windows port so the the cursor doesn't wonder off the

  Window while SNES mouse emulation is enabled.

- Improved 3dfx support on Windows port - load dialog doesn't drop out of

  bi-linear mode and underlying window zooms to full-screen so its easy to find

  and click on the menu bar with the mouse.

- Added Mouse and Superscope SNES emulation support to the Windows port, use

  '7' on the keyboard to select.

- Windows cursor now hidden unless super scope emulation is enabled.

- Windows port now has command line parsing - cheapo way of adding Game Genie,

  Pro Action Replay cheat codes, disabling sound CPU emulation for the

  corrupt copy of Star Fox 2, etc. Also allows ROM images to be dropped onto

  the Snes9x icon.

- Cacoma Knight seems to provide proof that Snes9x triggers the SNES

  non-maskable interrupt (NMI) too early. Changed interrupt to trigger at the

  start of the next horizontal blank period. Will have to watch for it

  causing problems for other ROMs.

- Added a translucency hack - when a ROM tries to create a stipple background

  pattern by enabling pseudo hi-res. and not enabling a background layer on

  one of the screens, Snes9x changes the effect to use transparency effects

  instead (the real SNES can't do transparency effects with pseudo hi-res.

  enabled). Now the water in Kirby 3 is translucent.

- SA-1 CPU reset bug fixed, now Jumpin' Derby boots and plays but with major

  graphics problems.

- Fixed nasty asm SA-1 custom hardware read/write bug that was causing the

  course map not to be displayed on Augusta Masters and Pebble Beach.

- Added SA-1 character conversion DMA support for all SNES depths, now

  Augusta Masters and Pebble Beach work.

- Merged in minor code changes for Linux running on the Alpha processor. Thanks

  to Sadruddin Rejeb for the changes.

- Added four more auto-multi-player-adaptor-emulation-off presets based on

  code from Mystagogus.

- Added DirectX3D output image processing support to the Windows port... and

  removed it again because it causes my desktop machine to lock up. Back to

  the drawing board...


- Fixed memory leak that crept in when SA-1 support was added when loading a

  game freeze file.

- Added SPC dumping option based on code from Cyber Warrior X that he sent me

  ages ago but I've just found again while looking for something else!

- Merged in most of the Amiga PPC port source code changes into the main

  source code tree.

- Keying on a sound channel seems to clear its last-sound-sample-block-just-

  played flag. Chaos Engine/Soldiers of Fortune needs this.

- Add multi-thread support to the UNIX ports for sound playing - required in

  the Linux port to work around a Sound Blaster Live driver bug and useful if

  you have multiple CPUs in your machine to help spread the emulation workload.


- Added BS 24Mbit ROM memory map, for Derby Stallion 96 and Sound Novel-TCool.

  No idea if it works. Thanks to Nose0000 for the info and code.

- Corrected unzip code not to loop forever if an encrypted zip file is loaded -

  an error is generated instead.

- Changed relative SPC700 cycle length for Mortal Kombat 3 to fix sample

  repeat problems - I wish I knew exactly how fast the SPC700 is clocked.

  Maybe I should write a test ROM and run it on a real SNES?


- 3dfx speed hack back again, only disabled when Seiken 3 is loaded.

- Some minor SA-1 speed ups added - the SA-1 instruction skipping code will

  have to wait until I have more time.


- Corrected a SA-1 reset bug that reset the SA-1 RAM bank pointer back to block

  zero but didn't clear the RAM bank register. Was causing Kirby 3 to crash.

- Fixed a wave clipping problem with interpolated sound that was causing noise

  on sound output when certain sound samples were played.

- Fixed a bug in the sync-sound code that could overrun the sound buffer by a

  few bytes causing clicks on the sound output.

- The sound sample repeat bug that has plagued Snes9x ever since is was called

  Snes96 finally bit the dust - Snes9x continued to play sample loops

  even if the game dynamically updated the sample not to loop. Fixes the

  stutter in the Mortal Kombat series and improves the sound from several games

  that download sound samples in real-time as they are played.

- Rewrote the code the handled the SPC700's 64 byte shadow RAM area to fix a

  possible sample corruption problem with ROMs that stored samples that

  cross the 64 byte start area.

- Added code to allow ROMs to change the sample being played the next time the

  channel loops or is keyed on - not sure if it fixes anything but seems more


- Added a zero-frequency fix to the stereo sound mixing code that I'd already

  added to the mono code some time ago.

- Changed the code to set the end-of-sample flag just before the last block is

  played, rather than just after. Seems to help improve the sound on some


- Sound sample start code now doesn't reset the channel's envelope volume level

  to zero before starting the sample - helps reduce the clicks being heard when

  a channel envelope volume level hadn't reached zero before being keyed on


- Changed initialisation of sample-end-register to 0 rather than 255 - seems

  more logical now I've thought about it. Not sure if it helps anything.


- Finally fixed the corrupt copy of Donkey Kong Country not working problem -

  Snes9x thought the ROM used the same memory map as Street Fighter Alpha 2.

- Added explode, un-shrink and un-reduce decompression modes support to the

  unzip code.

- Fixed offset per tile bug that crept in after me trying to fix the Starfox

  on-tilt bug.

- Made some fixes to the C Super FX emulation code, enough to get most 'FX

  games playable on the Mac port.


- Finally worked out how character DMA worked on the SA-1 and implemented a

  hacky, slow version, but its enough to get the level up screens displaying

  correctly on Mario RPG.

- Incorporated ZSNES' new optimised Super FX asm code - had to track down and

  fix a nasty memory overwrite bug in the code first to get it to work.

- Changed sample mixing code to not automatically wrap offsets to

  keep inside the sound buffer, external port code is now expected to do that.

  Helped me fix a problem in the Windows port that prevented very large sound

  buffers from working, which are required for some badly written sound card


- Corrected a bug in the SA-1 C code where incorrect processor emulation

  functions where called if the code was compiled with in-lining turned off.

- Fixed crash bug in Super Mario RPG on the level up screen - forgot to mask

  the enable bit from the RAM bank register. Thanks to Christian Wolf for

  sending me a freeze file which made it easy to find the problem.

- Fixed a lockup bug in the window clipping code, if the ROM ever turned off

  the sub-screen completely the clipping code would enter an infinite loop.

  Fixes The Cartoon Addams.

- Made the Daffy Duck NMI fix only enable when Daffy Duck is loaded - fix was

  causing problems for Breath Of Fire 1 and 2.


- Windows port no longer sets DirectSound to exclusive mode, so its now

  possible to hear sound output from Windows apps while Snes9x has focus.

- Fixed the freeze file loading and saving on the Windows port.

- More GUI settings are saved in the registry on the Windows port now.

- Added 3D/FX image scaling/filtering support to the Windows port.

- Added the TV mode from the Mac/Linux ports to the Windows port.

- Incorporated Kreed's new output image routines into the Windows port that

  fixes RGB555 display colour problems. Many thanks to Kreed.

- New auto-frame rate timing code on the Windows port, stops the silly speed

  up problems when the old code tried to 'catch up' after the emulator had

  been paused.

- Increased the DirectSound secondary buffer length on the Windows port to

  hopefully fix all the static/broken sound output problems some people were


- Altered the ZSNES Super FX asm code so the Windows port could use it - all

  previous versions of the Windows port were shipped using the C Super FX

  emulation code which is a lot slower.

- Implemented interpolated and sync-sound options on the Windows port.

- Added an image stretch option to the Windows port - stretches the SNES image

  to fill the whole screen or the Window. Looks really good on my TNT card

  since that chips seems to filter the image as it scales it.

- Implemented Windowed mode on the Windows port.

- Added special SPC700 cycle timing for Empire Strikes Back.

- Fixed the missing polygon problem for Super FX games - thanks to zsknight

  for the information.

- Implemented SA-1 support required for Mario RPG, Kirby Superstar,

  Paradius 3, etc. but since only a good image of Mario RPG exists, I could

  only test that game.

- Fixed a graphics clip window bug: inverting the area of a clip area that

  only consisted of empty bands should become the full width of the screen;

  Mario Kart's rear-view mirror display needs it.

- Fixed mode 7 render code to use correct z-buffer when rendering onto the

  sub-screen. Fixes Final Fantasy V title screen.

- Added horizontal offset per tile support in the offset per tile modes 2

  and 6, and switchable horizontal/vertical offset in mode 4. Fixes Chrono

  Trigger in several places and Mario All Stars title screens.

- Changed SPC700 relative cycle length to 14, needed for Stunt Car Racer.

- Enabled immediate triggering of NMI if NMI enable flag set while scan-line

  was on first line of v-blank. Needed to fix a background jitter bug in

  Daffy Duck: The Marvin Missions.

- Altered ROM load code to ignore corrupt ROM map type byte in ROM header,

  preventing the code erroneously detecting what it thinks are interleaved

  ROMs. Fixes EEK! The cat, Formation Soccer, the corrupt copy of Donkey

  Kong Country, ...

- Disabled IRQ re-triggering if V-IRQ registers set to the current line. Fixes

  Chuck Rock.

- Fixed missing sprites in Andre Agassi Tennis - writing to low byte only of

  the sprite write address register seems to also clear the hi-byte.


- Games written by the Japanese software company Human seem to need special

  SPC700 sound CPU timing, so the ROM load and reset routines now check the

  software author company and adjust the CPU cycle length accordingly.

  It gets Clock Tower, Super Fire Pro-wrestling Premium, etc working.

- Added ROM check sum calculation and testing code - Snes9x can now detect

  pure, corrupt or hacked ROMs.

- Noticed a fast way to implement the SNES 4096 colour mode, so I implemented

  it. Now the colours in ActRaiser 2 look correct.

- Corrected a noise frequency error thanks to information from Takehiro.

- Added a 'start in full screen mode' flag to the Linux port.

- While debugging the new graphics code I thought of a fast way to implement

  the SNES direct colour mode, tried it out and now the colours in Actraiser 2

  are correct.

- Blast, forgot about the colour window and fixed colour effects. The separate

  sub-screen is back again, but all the other graphics speed ups are there.

- Now I've got a z-buffer I keep finding other ways to optimise the SNES

  graphics rendering - no need for a separate sub-screen, no need to clear

  the sub-screen to the fixed colour, no need to waste CPU time on translucency

  effects on hidden pixels, no need to completely clear the main-screen to the

  back drop colour, etc., etc.

- Implemented a software z-buffer and changed the SNES graphics rendering to

  use it (required change for future 3D card support). Finally fixes the

  sprite-to-sprite priority bug that some games suffer from. Also a big speed

  increasing for some games (10 fps+), others are slight losers.

- Added code to skip the rendering of completely transparent graphic tiles

  rather than comparing each pixel to see if it is transparent; helps the

  frame rate a bit on some games.

- Added a fixed for Tetris & Dr. Mario - the game didn't like a multi-player 5

  adaptor plugged in to the real SNES when being played, so turned off the

  adaptor emulation for this game.

- Added hack for Final Fantasy II - if sync sound isn't on, make attack rate of

  1ms actually 0ms (old v1.16 behaviour). Causes a slight click but its better

  than samples being cut short.

- Fixed a clip window area invert bug if the colour window was enabled on

  on one window and the other window was being used to clip a background layer.

  Fixes the finial (I hope) display problem with Gun Hazard.

- Added code to intersect the clip window areas if both a colour window and

  a background layer clip window were enabled at the same time. Required by

  Gun Hazard.

- Forgot to mark graphic clip windows as needing recomputing when the master

  colour window inside/outside/on/off/main-screen/sub-screen PPU register was

  updated. Was causing display problems for Gun Hazard.

- Internal H-DMA execution accelerator pointer variables where not always

  being recomputed when started H-DMA part way into a frame. Was causing

  display problems for Gun Hazard.

- Made H-DMA continue for one extra scan-line to fix a disappearing monster

  problem in Dragon Quest 5. Thanks to Alex Jackson for the bug report.

- Zoop seems to require volume envelope height reading by the sound CPU to

  always return 0 when the channel is in gain mode.

- The sound code was ignoring updates to the ADSR volume envelope rates while

  one was in progress. Fixed that and now the bird song at the start of

  Chrono Trigger sounds correct.

- Had to disable the CPU shutdown code for loops reading the horizontal beam

  position, it was causing problems for Star Fox. Still no polygons though.

- Oops, sound DSP noise output was broken - accidentally deleted an important

  line while removing debug code ready for the last release.

- Added initial 3Dfx support to the Linux port - basically using the Voodoo

  card as a bi-linear filtering, scaling blitter. Actually slightly slower than

  TV mode, for non-scrolling images due to poor texture upload speeds to the

  card, but the full-screen feature is nice and the speed doesn't drop as more

  of the screen changes.


- Implemented a sync-sound mode where sound data gets generated in sync with

  SPC700 instructions being executed. Finally the sound Williams Arcade

  classics can be heard. Also helps slight sound timing problems in many other

  games but doesn't fix Mortal Kombat 2 like I thought it would - its

  sound routine programmers must have been on drugs or something!

- Added interpolated sound - gives low frequency sounds much more bass similar

  to a real SNES especially with the playback rate ramped up to 44KHz.

- Added on-screen messages as various emulation options are toggled on and off

  using the in-game keys.

- Fixed a PPU register read bug with the sprite register write position. Thanks

  to Takehiro TOMINAGA for the bug report.

- Altered the auto-frame skip timing code to only wait and re-sync to the end

  of frame when frames haven't been skipped. Again thanks to Takehiro.

- Speeded up the colour addition and subtraction code using ideas from



- Linux and UNIX sound code now driven directly from signal timer handler

  rather than the timer handler just setting a flag which had to be polled in

  the main emulation code. Slightly faster execution.

- Fixed the crash bug in the ZSNES Super FX asm code with Vortex - the game's

  polygons still aren't visible though.

- Implemented bent-line increase and exponential decay and sustain volume

  envelopes - they should match, or at least be very similar to the real SNES

  sound DSP chip now.

- It would seem ROMs can key on sound channels even if the channel hasn't

  been keyed-off, Pac-In-Time requires it. Changed code to allow it.

- Quick mod to ZSNES Super FX code to get Winter Gold working - it was already

  working with the C Super FX code.

- Added emulation of the extra 1/2 scan-line per frame on PAL and NTSC -

  should help improve music speed emulation.

- Worked around the click sound heard when ROMs use 0 volume envelope attack


- Removed the 'check for IRQ already happened' H-IRQ position register setting

  code - it was causing problems for Ninja Warriors and was not required by

  F1 Grand Prix.

- Fixed a bug in the new sound code - the sustain part of the

  attack-decay-sustain-release volume envelope was being skipped if the

  sustain level wasn't at 100%. The fix has helped some music notes from

  being cut off early in a few games.

- Added fix to Pro Action Reply support (again). Thanks to Paul Shoener III for

  the original fix and Gil Pedersen for reminding me to apply it!

- Finally fixed the Tales of Phantasia 'bum note' problem! The ROM set its

  sample directory to the upper-most page and I forget to code for the hidden

  64 bytes of RAM, that appear when the boot ROM is switched off, when fetching

  sample addresses.

- Adjusted the relative cycle length between the 65c816 and the SPC700 slightly

  to get Terranigma working again.

- Oops, the emulated joypads 3 and 4 via the emulated Multi-player 5 interface

  weren't working. Thanks to Steffen Schwenke for the bug report.

- Optimised the echo sound code - by-passed the the FIR filter code if only

  a pass-through FIR filter was defined by the ROM.

- Modified V and H-IRQ register changing code to trigger an IRQ immediately if

  V-IRQ is enabled and the scan-lines match and either H-IRQ is not enabled or

  the electron beam position has already gone past the trigger point. Fixes

  the screen flicker in F1 Grand Prix.

- Modified the priority-per-pixel mode 7 code to use BG#1's clipping data if

  the top bit of the mode 7 pixel is set. Fixes initial track drive-through

  display in F1 Grand Prix.

- Modified the sprite priority levels for the priority-per-pixel mode 7

  display. Now the car can be seen in F1 Grand Prix.

- Wrote a sound DSP register recording scheme which 'plays back' the register

  changes in sync with the sound generation code. I'm bit disappointed, it

  only improves the sound in a very few games... Scrapped the code, it actually

  causes more problems than it fixes. Oh, well, another 3 weeks work wasted...

- Fixed a SPC700 wake up problem for Lufia I - made the SPC700 also wake up

  when the 65c816 read from one of the four comm ports.

- Included lots of sound code speed ups and sound quality improvements

  from Takehiro TOMINAGA - many thanks go to him.


- Fixed a case where the -forcelorom option didn't work - the case was

  required for Formation Soccer which claims in its ROM header to use the

  same memory map as Super FX ROM, it doesn't.

- Pulled apart a real SNES using a crowbar (great fun), just to look at what

  speed the SPC700 is actually clocked at for more accurate relative emulation


- Implemented SPC700 cycle counting in the hope the improved timing would fix

  Tales'; no such luck but at least the -ratio option is obsolete now.

- Implemented executing SPC700 instructions during DMA, fixes BSZelda and

  Goal lock up at start and music pausing briefly when ROMs do lots of DMA,

  usually between game screens.

- Scrapped the i386 asm SPC700 code - it was the cause of the music not

  restarting after a battle in Chrono Trigger and FF3 and I didn't realise

  because the bug had already occurred in the test freeze-file I had.

  Thanks to John Stiles for pointing out that the Mac port didn't have the

  missing music problem.

- Fixed RGB subtraction bug on displays with only 5 bits for green, e.g. RGB555

  displays. The GREEN_HI_BIT variable was always set to a value for 6 bit

  green displays.

- Added the SA-1 memory map, still a long way to go before any SA-1 game will



- Jumped versions to keep in sync with the DOS port release.


- Improved 8-bit sound generation slightly, but it still sounds very poor

  compared to 16-bit sound.


- Implemented the Tales of Phantasia memory map using the information supplied

  by zsKnight. Had to also implement a de-interleave routine to work around

  a ROM feature and Snes9x CPU instruction fetching implementation detail.

- Added a frames-per-second on-screen display option.

- Fixed the final glitch bug with the Mario Kart track display - the byte code

  for the termination of the DSP1 raster command wasn't been recognised.

- Disabled a NMI/DMA hack for Rise of the Robots, was causing problems for

  Mario Kart and 'Robots wasn't working correctly anyway.

- Optimised the mode 7 rendering a little.

- Changed tile rendering code to use offsets into screen buffer rather than

  direct pointers ready for z-buffer implementation.


- Changed V-blank NMI to occur immediately after a WAI instruction, Toy Story

  required this.

- Fixed reading of H-DMA line counter register, Top Gear 3000 needed this.

- Ripped off large parts of ZSNES's DSP1 code (with _Demo_'s and zsKnight's

  approval). Now Mario Kart works almost 100%.

- Added a check to see if a vertical scan-line IRQ register change will cause

  a H-IRQ later on the current scan-line. Pilot Wings needed this.

- Fixed possible crash bug in clip window code when both windows had two

  spans. Could actually cause Chrono Trigger to crash the emulator.

- Fixed a lock-up problem with the C Super FX code, Star Fox and executing

  a few 'FX instructions per scan-line (required for Winter Gold).


- Partially fixed the DOS netplay server - the server timer is running too

  slowly and it doesn't deal with disconnects correctly yet.

- Corrected the sound echo delay - it was varying with the sound playback

  rate chosen by the user - it shouldn't have been.

- Implemented DOS netplay code - DOS server code still not working though.

- Removed all floating point calculations from the sound generation code.

- Fiddled with the pitch modulation code - my guess is the output of a

  channel that is used to modulate the frequency of another channel is

  automatically muted by the SPC700 chip. Just a guess, but the wind from

  FF3 sounds 'better' but far from perfect.

- Optimised the tile palette index calculation.

- Optimised the planar to chunky tile conversion code.

- Fixed X11 port to always scale SNES image if hi-res. only (no interpolation)

  support is enabled.

- Added zipped ROM image support using Gilles Vollant unzip code and

  some code that Ivar (Lestat) sent me a long time ago.

- 65c816 asm RTI instruction was destroying the program bank in emulation mode,

  the C code was already correct. Caused C64E to break.


- Finished NetPlay v1 - allows up to five networked machines to play

  multi-player SNES games, one player on each machine.

- Switchable full-screen mode added to Linux X11 port, some code and ideas

  nicked from Maciej Babinski's original Snes9x XFree86 DGA Linux port, the

  UAE Amiga emulator, plus lots of my own code.


- Bug fixes to C Super FX emulation - now Winter Gold works correctly again.


- More DSP1 work. Mario Kart is now playable! The character projection code

  is still broken so the opponents and obstacles aren't always positioned

  correctly on screen and you keep bumping into them, but I can still keep

  coming first!

- Started work on NetPlay support.

- Decreased sound card DMA buffer size on DOS port to improve sound generation

  and sound CPU synchronisation in some games.

- Included Linux joystick driver patches from Vojtech Pavlik so the port can

  use the new v1.x joystick drivers, again written by Vojtech Pavlik. Allows

  use of Micro$oft Sidewinder pads, NES and SNES pads, PlayStation pads,

  Gamepad Pros, etc.

- Added halve-the-result colour subtraction.


- Extended code to allow support for multiple 16-bit screen formats,

  switchable at run-time, rather just supporting one, selectable at compile


- Added XFree86 DGA Linux port - code from Maciej Babinski.

- More fixes to the X11 image format conversion and setup code.

- The asm SetByte routine wasn't wrapping writes to S-RAM correctly, allowing

  some ROMs to think they were running on a copier and put up an error

  screen. Thanks to Nu of #rom for the report.

- Added 'TV-Mode' support (interpolation and scan-lines) to the DOS and

  UNIX ports from code based on John Stiles work.

- Added v-sync option to the DOS port.

- Added fix to Pro Action Reply support, thanks to Paul Shoener III.

- Added ggi support (untested) to Linux port using patches from

  Alexander Larsson (

- Added 16 to 24/32 bit image conversion routines to the UNIX X11 code.

- The SPC700 OR1 instruction was broken. Thanks to Pyrgopolinices for the


- DOS port was having trouble splitting and joining path names - caused

  problems when specifying the full path name of a ROM when the ROM image

  was on another drive.

- If a ROM reset the sound DSP and then turned on echo effects but kept

  the same echo delay setting, then the echo effects could not be heard.

  Thanks to for the bug report and freeze file that made it

  easy to find the problem.

- DOS port was always using stereo sound setting, if sound card

  supported it, regardless of the user preference.

- Linux port X11 port could crash if window was resized while transparency

  effects were enabled.

- The colour subtraction accelerator look-up table was slightly wrong, causing

  one bit of red, green blue values to 'spill' into the next field.

- Allowed colour window to cut a hole in the main-screen and show the sub-

  screen underneath. The effect is used by Illusion of Gaia.

- Added support for colour subtraction, with the halve-the-result flag


- Included DSP1 code from _Demo_. Now you can see the track in Mario Kart and

  the ground in Pilot Wings - still can't play the games though due to other

  missing commands.

- Added an NMI hack to work around a code bug in Battle Toads: BATTLEMANIACS,

  its only by chance that the game works on a real SNES - And disabled it

  again because it causes problems for Chrono Trigger.

- A frame skip of zero was actually still skipping one frame. Thanks to

  Marius Fodor for the info.

- And yet more X-OR window bug fixes - now the effects during some of the more

  'posh' spells look correct in Chrono Trigger.

- Yet another window area inversion bug - off by one pixel on right-hand edge.

- Forgot to put dummy start and end points for XOR window combination modes -

  now Uniracers looks correct and Sailor Moon looks like it does on a real


- Window clip code was using wrong index into a 2-dimensional array when

  the whole of the main or sub-screens were clipped.


- The master volume disable code was looking that the wrong variable!

- Fixed crash bug in newer sound code if a ROM tried to start a sample

  playing who's data went past the end of SPC700 memory. (Cannon Fodder)


- Fixed DSP1 ROM header detection bug.

- More DSP1 work; still nothing works, although I know the multiply command

  is correct because I've compared the results against a real DSP1.


- Oops, the multi-player 5 disable code change broke the multi-player 5 being

  the default controller.

- Implemented the colour window on the main screen - now Zelda's oval zoom

  window displays correctly and Krusty's Super Fun House clips the left-most

  8 pixels as it does on the real SNES.

- TERRANIGMA didn't like me returning a random value when it attempted to

  read a channel's the current sample byte.

- Hacked in initial support for mode 7 priority-per-pixel - the priority bit

  doesn't actually change the priority of the pixel but the two games that I

  know of that use the feature look OK. (Winter Extreme Skiing and the

  intro of Tiny Toons Adventures).

- Colour addition/subtraction code now uses RGB565 rather than RGB555

  calculations - helps a little with the loss of the bottom bit of SNES

  colour data.

- DSP1 emulation started - nothing works yet.


- Switched to adding back drop colour rather than fixed colour when

  sub-screen addition is enabled but there's nothing on the sub-screen.

  Uniracers seems to need it. - DISABLED it again. Causes problems for

  other ROMs and Uniracers itself on later screens.

- Fixed XOR window logic combination mode and area inversion code, now

  Uniracers works correctly.

- Oops, if colour window and half colour addition/subtraction were both

  switched on, area outside colour window was still being halved, it shouldn't.

  Hacky fix at the moment until I implement the correct fix.

- Fixed several bugs with the mosaic effect and 16x16 tiles and a few

  possible background scroll offset bugs and the mosaic effect.

- Optimised the sound sample generation code for cases when the SNES

  sample playback frequency was higher than the sound card playback rate.

- Fixed possible click sound when a sample was first started to be played.


- Corrected scan-line count for PAL games - should be 312 lines verses 262 for

  NTSC. Was causing slow music on PAL games.

- Added error correction code to the SPC700 timer update code - the

  SPC700 timers are updated using the emulated h-blank handler which is

  called every emulated 63.6 microseconds (15.720KHz) but the SPC700 timers

  need to be updated at multiples of 8KHz, hence the error. Was causing

  music to be played slightly too fast.

- Switched back to using C SPC700 code - the old SPC700 asm code was lacking

  several optimisations that the C version had. It also had multiple

  speed hack cycle skipping bugs. Plus I hadn't even finished optimising

  all the code from the last time I converted the C compiler output.

- Optimised SPC700 memory access routines a little.

- Disabled code that prevented ROMs updating SPC700 timer values while the

  timer was running - it seems like it is allowed, even though docs on the

  'net I've seen say its not.


- Fixed SuperScope support.

- Added hi-res. option to my DOS port.

- Fixed 4, 6, and 8 button standard PC joystick support.

- Changed some types the source code was using BYTE -> uint8, WORD -> uint16,

  DWORD -> uint32 and BOOL -> bool8, types were clashing Windows typedefs

  but sizes didn't always match.


- 8-bit double height and/or width tile rendering was missing every other

  group of 4 pixels - screen pointer advance count was wrong.

- Asm SPC700 emulation was ignoring the Shutdown flag - the result is its

  not possible to turn off cycle skipping for the SPC700 emulation.


- CPU to ROM address decoding code rewritten - used by Game Genie cheat codes,

  orginal code might have been the cause of some Game Genie codes not working.

- Started to remove printf calls and replace them with calls to S9xMessage,

  port code can then dicide what to do with message.


- Re-enabled decompressed sample caching, still has a possible click problem

  but the sound code is a lot faster with it enabled. Added command line option

  to disable it if required.

- Added '7' key support to rotate through available controller options, in

  the order multi-player5, mouse on #1, mouse on #2, superscope,

  standard controller and then back to multi-player5.

- Hi-res. (512x448) support fixed.

- Mouse support completed - Lemmings 2 and Mario Paint working a treat.

- More colour window fixes.

- Fixed freeze game problem when ZSNES SuperFX code is being used -

  ZSNES 'FX state was not being saved and restored.

- ZSNES SuperFX asm emulation code plugged in to Snes9x.


- Looks like if the colour window is not enabled at all and the colour

  window selector is defined to only allow colour effects inside the colour

  window, then no effects should be visible.

- Offset-per-tile rendering code didn't support width 64 screen size, which

  Chrono Trigger used on its title screen.

- Contra 3 seems to prove that defining the clip window area to be 'outside'

  a window that covers the whole screen is not an area with no range.

  - No it doesn't. It proves that I shouldn't have initialised the right

    window edges to 255! Contra 3 enables clipping windows without first

    defining their range.

- Debug frame advance feature was being prevented from forcing the next

  frame to be rendered by SyncSpeed which was being called after the

  debugger returned to the main loop.

- H-DMA code was allowing ROMs to manually start H-DMA during the v-blank

  period, ROMs shouldn't be allowed to do this.

- Asm code would not push the correct CPU status onto the emulated stack if

  returning from an NMI immediately triggered an IRQ - fixes Mortal Kombat 1

  and War of the Gems.

- 'd' dump memory debug command was not preserving the CYCLES count.

- C versions of SNES memory access code had same problem as asm code on the DOS

  port except it didn't cause a crash just ROMs failed to work correctly.

- Asm i386 code was using signed compares to check for special case memory

  areas - it was causing crash problems on the DOS port which was sometimes

  returning valid address values with the top bit set - i.e. they seemed

  like negative values!

- Changed event reschedule code to always allow h-blank start events, used to

  disable them during v-blank period.

- Added code to HDMA when end of visible lines reached.

- Changed register 4212 code not to always return h-blank when in v-blank.

- Clipping fixed colour addition to background area was off by one pixel on

  the right-hand edge.

- HDMA: Finally worked out how the real SNES operates when ROMs manual

  start H-DMA during the frame - ROMs must set up the H-DMA line count

  and address values before H-DMA is started.

- Fixed the asm code to remove all hard-wired structure offsets - one offset

  into the IPPU structure was wrong in the code because the structure had

  changed size.

- Added colour window support and allowed graphic window settings to be

  different on the main screen and sub screen, just like a real SNES.

- SuperFX LJMP instruction had bank and address values swapped.

- Fixed possible memory overwrite problem because OBJList array was one

  element too short.

- Added AND multi-graphic window combo support.

- ROM image memory allocation allocates an extra 32K of RAM, then moves the

  pointer forward by that amount - stops the SuperFX emulation from accessing

  unallocated memory, possibly causing a crash.

- SuperFX emulation now stores sign and zero flags in separate variables so

  the MERGE instruction can set flags correctly.

- Added 65c816 instruction skipping to i386 asm code when 65c816 waiting in

  a simple loop for some 'event' to happen e.g. end of frame NMI.

- Finally fixed the APU instruction skipping problem with the i386 asm

  code when the WAI instruction is used - caused slow music on some ROMs.

- Offset-per-tile modes don't seem to support screen size - Mario All Stars

  Super Mario 2 requires this on title screen. Doesn't seem to effect

  Tetris Attack or Puzzle Bobble.

- Changed SNES select and start keys from shift and control to space and

  enter - allows shift-fn key to save game positions without the SNES ROM

  also getting a select joypad button press.

- Multiplayer5 support for controllers 3+ was broken for ROMs that used

  automatic hardware joypad reading rather than reading joypads serially.

- ResetPPU was not clearing tile caches and marking OBJ as need recomputing.

- Cached OBJ positions and sizes were not being recomputed if ROM changed

  global OBJ sizes during frame.

- Fixed brightness multiplication problem on 16-bit code for green.

- SPC700 emulation now uses one variable to store ZERO and NEGATIVE flags.

- SPC700 emulation now only increments PC once at end of instruction.

- New ROM type and interleaved detection code.

- Reading sound DSP register ENDX also clears the value. The docs on the

  'net said that only writing to the register cleared its value. Fixes

  sound in Zoop.

- Fixed mode 4 colour palette problem on background #2 in tile-based graphics


- Fixed graphics mode 4, offset-per-tile support. Only one set of offset data

  that is switchable between horizontal and vertical, unlike modes 2 and 6

  which allow separate horizontal and vertical offsets per tile.

- Modified the APU timer code again, if the timer is enabled, a write to the

  timer target register is only allowed if a value hasn't been written yet.

  Fixed Donkey Kong Country 1 and Earth Worm Jim 1 & 2.

- Attack rate of 0ms changed from 1ms back to 0ms because of a group of ROMs

  that change from attack mode to decay mode in real-time. Will change back

  when I've added better SPC700 CPU and sound generation sync code.

- Added support for ROMs set a new sound timer value while the timer is

  enabled (EWJ 1 & 2).

- Added support for ROMs that read the sound envelope height (MK1, MK2, etc).

- ROMs writing to the H-DMA enable register during visible scan-lines were

  restarting H-DMA for that frame causing random screen effect corruption.

- Echo feedback seems to be after the FIR filter, not before as a diagram I've

  seen suggests.

- Sound pitch modulation added.

- Memory access routines changed to pass a single 24-bit address rather than

  the previous separate 8-bit bank and 16-bit address parameters.


- Updates to A-Bus address during a frame must not update H-DMA address.

  Fixes Actraiser 2 and Pacman 2.

- Removed sound volume mangling - with echo support enabled it doesn't seem to

  be required.

- Attack rate of 0ms changed to 1ms to help prevent click sound with sudden

  start of a sample playing.

- Sample caching of samples that looped using part of the original sample

  created a click on the sound output. Caching disabled for the moment. Would

  require 512K of cache RAM to fix sample caching.

- Colour addition/subtraction support added - but still a little buggy in

  places and very slow.

- 16-bit colour support added.

- Sustain sound volume was not being set if a sample using ADSR was started

  with both the attack rate and decay rate set to zero - resulted in missing

  sound samples on with some games.

- Sound echo support added.

- Sound channel mixing code was not completely clearing a channel's sound

  buffer when a channel finished playing a sample.

- Sound mixing code rewritten to use one buffer, rather than writing each

  channel into a separate buffer then combining them into one buffer.

- Memory access routines rewritten to use an 8K block lookup table rather than

  dedicated code for each ROM memory map - it was getting difficult to support

  the new types of SNES ROM memory maps becoming apparent.

- Sound sample decoding wasn't decoding sound samples correctly if a

  previously cached sample was only partially overwritten by the ROM as

  opposed to being completely replaced.

- Sound sample decoding wasn't clipping generated sample values correctly.

- Changed H-DMA to start in the current frame only if enable register is

  written to during v-blank, h-blank or while the screen is blanked.

- The SPC700 seems to start executing instructions before the 65c816 -

  shorter reset pulse? (NO - forgot the SPC700 executes instructions while DMA

  is taking place).

- ROMs that reset the H-IRQ position so another IRQ would be triggered on the

  same scan-line where not supported - Super Off-Road: The Baj needs it.

- $4212 bit 7 needs to go high at the end of h-blank at line 224 not at the

  start of h-blank - Bubsy needs it.

- Sample decoding routine could write to memory outside sample cache area if

  address of block to decode was greater than $0x10000 - 9.

- Walking mario can be seen on map screen of MarioWorld - needed sprite

  priority rotation working. ROM sets bit 7 of $2103 then sets rotation in

  $2102. Reset rotation at start of v-blank not at end.


- Fixed reading of DMA register values - now Ms Pacman works.

- Saved sprite memory address being restored on the wrong scan-line - caused

  corrupt sprites on at least one game (GANBARE GOEMON 2).

- Screen colour palette not being updated if ROM only wrote to low byte of

  palette register.

- Possible memory corruption fixed if a ROM tried to write to an invalid

  sprite address via PPU registers.

- X11 port support quick load and save by pressing function keys to load or

  shift + function keys to save.


- Added option to disable graphic window effects - T2: The Arcade Game doesn't

  seem to like them.

- Mode 7 "outside screen area" register interpretation fixed - now the

  Actraiser map screen looks a lot better.

- Old DMA code hack for Battle Toads: Double Dragon removed as it was no

  longer required and it was causing problems for Ys III.

- Lowered max volume level of 16-bit sound mixing code to help with sound

  clipping problems is lots of SNES sound channels are playing.


- Crash bug fixed in mode 7 graphics windows code


- Fixed a noise channel volume bug - noise waveform was getting clipped.

- Fixed 24bit X Window System server support on the Solaris port.

- Sprites in priority level 1 on mode 7 were being drawn incorrectly behind

  graphics screen.

- BG 3 priority 1 tiles sometimes not drawn dependent on the $2105 bit 3


- Added graphic window support the tile redraw code.

- Added mosaic support to tile redraw code.

- Tile redraw code was drawing one line too many on screen-splits.

- Tile-based redraw code made more intelligent about when a background should

  be displayed or not.

- Added wrap within bank support to large DMAs just to support Rock 'n' Roll



- DMA routines added lots of special cases and removed most calls to GetByte,

  using a pointer instead.

- Multiple using PPU registers is now only computed when first byte of result

  is actually read.

- Sound enabled by default if compiled without DEBUGGER defined.

- Tile redraw method made the default.

- Fixed CPU_SHUTDOWN so SPC700 continues to execute even if main CPU is

  "skipping" cycles waiting for an event to happen.

- More command line options added.

- Default cycles-per-scan-line to execute lowered to 90% from 100%.

- +/- keys now work even if auto-frame rate adjust was enabled.

- SPC700 emulation partially rewritten in assembler.

- Asm 65c816 code change to use same speed up techniques as the C++ code.

- Minor speed tweaks to the sound decoding and mixing code.

- C++ SPC700 emulation changed to use same method as 65c816 emulation for

  computing and storing emulated CPU flags.

- Mode 7 code rewritten and several scrolling offset bugs fixed.

- Lo-ROM S-RAM memory map bug fixed - now Uniracers works.

- Multiple speed ups and changes to the tile and line-based redraw code.

- Tile and line redraw code changed to cache converted tiles between frames.

- Variable cycle length timing made compile-tile switchable.

- C++ 65c816 emulation changed to use several opcode jump tables to avoid

  a register size comparison test on most emulated instructions.

- C++ 65c816 emulation changed how is computes and stores emulated CPU flags.

- Fixed high frequency sound playback bug - the sample rate calculation was

  blowing the range of an unsigned long.

- Fixed V-RAM reading so DKC3, Addams Family, Aladdin and Pacman all work.

- Fixed sound code so ROMs can change from ADSR mode to decrease mode - fixes

  lots of ROMs.

0.12 released

- Added dynamic speed regulation.

- TCALL vector calculation change from n to 15 - n.

- Fixed crash bug if ROM writes to sound DSP register numbers greater than


- Fixed DOS memory locked for interrupt code.

- Added long name versions of command line switches.

- Added command line switch for SPC700_SHUTDOWN code and WAI cycle skipping


0.1 released

- All DOS memory is now locked from being swapped.

- Fixed DOS port keyboard polling code - could get confused if a keyboard

  interrupt happened while keys were being checked.

- SPC700 ADC instruction never cleared Overflow or Carry flags!

- Changed selection of playback speeds for Solaris port.

- Sample caching code was broken - cached samples were never used.

- Added code speed ups for ROMs that use a lot of DMA to VRAM.

- More cpu code asm speed up.

- Fixed 16x16 size tiles on tile-based redraw code.

- Fixed sound gain-mode increase and decrease volume envelopes.

- Added code to support ROMs that reuse sprites in the same frame.

- Fixed processing of negative volume levels.

- Fixed SPC700 EOR1 instruction.

- Added SPC700 shutdown code to stop executing SPC700 instructions if in

  a tight loop waiting for a timer or for the 65C816 to respond.

- DOS playback rate was being forced to 16KHz by Allegro - fixed.

- Fixed bug in SPC700 MOV1 C,bit, address.

- Fixed a off-by-one loop sample pointer bug in MixSamples.

- Added command line flags for cached-tile based drawing and sub-screen

  background layers priority swapping.

- NOPE, got encoding of the OR1/EOR1,AND1 range of correct originally -

  got duff information from an "SPC700" programmer.

- More SPC700 fixes: got the encoding of the OR1/EOR1,AND1 range of

  instructions wrong - I guessed wrong originally.

- Sample looping bug fix on mono sound mixing code.

- Sound pitch value no-longer clipped to 14 bits - apparently FF3 needs this.

- Followed Paradox's suggestion and changed graphics code to place sub-screen

  background layers below main-screen background layers. Helps lots of games

  that use sub-screen addition/subtraction - now you don't have to toggle

  background layers on and off so often just to see hidden text, characters,

  or maps, etc. Made it switchable.

  Acts as a good intermediate solution until sub-screen addition/subtraction

  is actually implemented.

- Modified sound skipper code to return random values when ROM is stuck

  waiting for the SPC700 CPU to respond - helps several ROMs that previously

  don't work with the currently selection of APU skippers.

- Improved sound mixing code so volume is not attenuated so much, giving

  better results on 8bit sound cards.

- Changed the frequency at which the joystick polling routine is called - now

  called every-other frame rather than every 3rd frame.

- Recompiled Linux and DOS ports with the Pentium optimising version of gcc -

  gives a few percent speed increase.

- Changed V-RAM increment count from 64 to 128 - apparently Final Fantasy 3

  needs this as well.

- Fixed sprite priority bug with Mode 7 - apparently Final Fantasy 3 needs


- Fixed a screen clipping problem with the S-VGA mode.

- Fixed bug that had crept in with -m 2 S-VGA mode (Linux version).

- Fixed S-VGA Linux version with sound enabled.

- The SPC700 ADC (X),(Y) instruction was broken - with all these SPC700 fixes

  now many more ROMs work with sound enabled.

- The SPC700 Pop PSW instruction was not resetting the direct page location.

- The SPC700 instruction MOV A,[DP+X] was incorrectly doing a MOV A,DP+X.

- Got the SPC700 SETx and CLRx instruction encoding swapped around.

- Fixed #define problem that was stopping DOS snapshot saving from working.

0.72 released

- Fixed the DOS filename handling - old Unix code was screwing up with ROM

  filenames that contained backslashes (\) - the ROM would load but S-RAM

  loading and saving would fail and the default filename for snapshots

  wouldn't work.

- This time really fixed Allegro library keyboard handling (DOS port); it

  was missing key some presses/releases (was stopping Chrono Trigger

  Left + Right + A button combo from working).

- Added code to automatically remove headers off S-RAM save files with

  512 byte headers.

- 32Mbit ROMs in interleaved format are now automatically detected and


- Added -ss 3 sound skip method support to the asm version - now NBA Live '96

  works again.

- Added support for multi-part ROM images.

0.71 released

- Made statically linked (again) on Linux port - sorry.

- Made writing to $4200 also clear any pending IRQs. This finally allows

  Battle Toads: Double Dragon, Spawn and Sieken 3 all the work with the same

  IRQ logic (but Sieken 3 still gets stuck in sound download code).

- Fixed a H-DMA wobble bug - some frames could randomly miss a line of

  H-DMA causing the F-Zero screen to wobble, and slight text character

  corruption on games like DKC3.

- Interleaved format ROM images are now swapped in-place, without the need

  for a temp 4Mb buffer (saves lots of disk swapping on a 16Mb Windows 95


0.7 released

- Fixed Allegro library keyboard handling (DOS port); it was missing key

  some presses/releases.

- DOS port had a different MAX_PATH value which moved the location of the

  SRAM size variable when using the asm CPU emulation core. This, in turn,

  caused the SRAM emulation to fail on the DOS port. Donkey Kong County 2 & 3

  were reporting a ROM copier was connected to the SNES and refused to run.

- Fixed assembler version of XCE - it was always leaving the carry flag

  clear - caused Killer Instinct and Super Punchout to think a ROM

  copier was fitted to the SNES and they all refused to run.

- Fixed assembler versions of MVN/MVP - they weren't setting the data bank

  register to the destination bank of the instruction.

- Fixed joystick detection on MS-DOS port - a single 2 or 4 button joystick in

  port 1 was being ignored if a second joystick was not present in port 2.

- Fixed an uninitialised variable in graphics code - was causing random

  missing scan lines on Mode 7 screens.

- Joysticks now scanned every 3rd frame (joystick scanning is slow in the PC).

- Double-whoops, Metriod 3 had stopped working in v0.6 - fixed it

  (memory map bug).

- Made bit 6 of $4211 set if v-counter == v-timer-position.

- Made reading of $4200 read $4212 instead.

- Adjusted DMA timing to always access ROM memory at slow speed - this seems

  to fix Battle Toads.

- Added code to automatically clear pending IRQs when the horizontal line

  is no longer equal to the horizontal timer line - this fixes Seiken 3, it

  now just gets stuck in the sound CPU wait code - oh well.

- Moved NMI back to its original pre-0.65 behaviour, now Puzzle Bobble works.

- More graphics speed ups - the code to render background tiles with their

  priority bits set is only called if there are actual priority-bit tiles.

- Changed default frame skip rate from 1 to 2 - its seems most people don't

  bother to read the docs, so I thought I'll help them out a bit!

- Speeded up Mode 7 graphics on games like F-Zero that rewrite the matrix

  registers on each scan line using H-DMA.

- Reorganised the graphics code and did a slight speed up - graphics code

  will be the next thing to rewrite in assembler.

- Rewrote CPU core in assembler for Intel platforms - gives a very noticeable

  speed increase.

- Fixed several problems with the APU sound CPU emulation - its now getting

  stable enough to try and implement sound.

- Fixed bug that caused 1 byte of S-RAM to be emulated when ROM didn't

  expect any - it was enough to stop Street Fighter 2 and others from

  working - thanks Lord ESNES.

- The TXS and TCS instructions shouldn't set the Z and N flags.

- Looks like MVP/MVN instructions should ignore accumulator size - change

  code to always use all 16 bits and exit with accumulator set to 0xffff.

- Whoops, accidently left some test code in which was causing the V-BLANK

  flag, bit 8 in register $4212, to be miss-calculated.

- Fixed palette in mode 0.

- Speeded up graphics drawing a little by skipping groups of 4 pixels that

  were all transparent.

0.65 released

- S-VGA and MS-DOS ports now have a VGA mode command line flag.

- Improved the fading code - should be much more smooth now.

- Fixed second joy-pad support and re-mapped keys and joysticks to actually

  make a match between what my docs said and a real SNES (SNES docs I'd

  seen were wrong!).

- Fixed a bug in Relative Long CPU addressing mode.

- Ported Snes96 to MS-DOS.

- Snapshot loading and saving no longer uses external gzip binary.

- Added support for registers at $21c2 and $21c3.

- Made reading the software latch for the horizontal and vertical counters also

  clear any pending IRQ.

- Added sprite priority rotation.

- Rewrote parts of the graphics routines to fix a sprite-to-sprite priority


- NMI flag changed again - now back to being reset by reading $4210 but

  actual NMI is delayed.

- Made mode 7 background colour 0 transparent - this fixed several sprite

  priority problems a few games where having.

- Finally worked out how sprite "Object Name Select" works and emulated it -

  this fixes many (if not all) of the corrupted sprites some games


- Delayed NMI activation for one instruction to give time for loops that

  wait for bit 7 of $4210 to go high.

- Special-cased line count of 128 on H-DMA to mean repeat previous data with

  a line count of 128 and not just terminate H-DMA on that channel.

- APU sound CPU emulation added - just need to debug the thing.

- Fixed Overflow flag setting in ADC and SBC instructions - it was never

  being set.

- Rewrote how CPU instructions are fetched and how values are pushed and pulled

  from the stack - it gave a very large increase in emulation speed.

- H-DMA was being started one scan-line too late.

- Added CG-RAM reading support.

- Added "Full Graphic" V-RAM reading.

- Speeded up C version of CPU emulation quite a bit - could speed it up a

  little more before rewriting in assembler.

- Fixed bugs in 16x16 tile drawing on 2bit and 8bit deep screens.

0.6 released

- Speeded up 16x16 tile background rendering by removing a temp tile buffer

  it was using. The speed up also fixed a vertical scroll bug.

- Fixed slight window clipping on 16x16 tile backgrounds.

- Added automatic PAL/NTSC mode switching.

- Fixed background and sprites so only visible if on main-screen or

  on sub-screen under correct circumstance.

- Fixed lockup bug in DMA.

- Stopped NMI flag from being reset by reading $4210 - was causing a couple

  of games to get stuck.

- Whoops, got horizontal and vertical Mode 7 flip bits around the wrong way!

- Fixed MIT shared memory pixmap support for X11 version (it was always turned


- Fixed minor bug - first sprite in priority group was drawn twice. Didn't

  cause any visual bugs, it just slowed down redrawing a little.

- Fixed DMA bug - transfer byte count should be 0 after DMA has finished.

- Fixed a scaling bug if width < height.

- Interleaved ROM image support added.

- 16bit and 24bit X11 server support added - with scaling.

- Added window scaling on X11 version.

- Partial clip windows added - the only window overlap option implemented at

  the moment is OR, it seems it good enough for all the ROMs I've tested

  it with.

- Partial Mosaic effect added (pixels only growing vertically).

- Missing Mode 7 "outside screen area" option added.

- Fixed mode 7 screen wrap "outside screen area" option.

- Used new event processing to finally fix H-IRQ so it triggers at the

  correct position on the scan line.

- New event processing added.

- Linux version now statically links (sorry).

0.5 released

- Linux S-VGA version changed from using a 320x240 ModeX screen (slow) to a

  256x256 chunky screen (faster) - thanks to Phillip Ezolt (

  for information on how to do this.

- Mode 7 screen flipping added.

- Included Snes97's CPU emulation code into Snes96. Didn't fix any bugs but

  slowed down the emulation some what and I couldn't compile it optimised

  because it was so large - so I removed it again.

- Added a few extra features available via the keyboard.

- Fixed a H-DMA transfer mode - bad documentation.

- Fixed H-DMA indirect addressing (it was using the wrong CPU memory bank).

- The Linux slow down bug is my crappy laptop enabling battery saving features !

- Changed graphics code to perform true line-by-line screen updates.

- Fixed sprite drawing bugs.

- Ported Snes97's graphics code to Snes96.

- Fixed memory map for HiROM save RAM area.

- Fixed HiROM memory map - now Killer Instinct and Donkey Kong County work !

- OK the slow down bug is just actually my laptop trying to save battery

  power by slowing the CPU clock!

- The Linux slow down bug shows itself on DOS emulators running under DOSEMU

  so it must be a kernel problem (or feature).

- Fixed H-DMA (again) to be complete emulation - all I need now is line-by-line

  screen update...

- Fixed DMA to not copy too many bytes if byte count was not a multiple of

  the transfer mode quantity (caused corruption on Super Mario World map screen).

- Changed mapping of keyboard to joy-pad buttons and added additional

  direction keys for joy-pad one so player one's right hand doesn't have to

  obscure player two's keyboard joy-pad buttons.

- Changed joystick button layout to match SNES if using a 6 button joy-pad.

- Changed snapshot format so I can easily use libgz on Linux.

- Added few speed up tweaks that will be lost again when I add line-by-line

  screen update.

- First visible scan-line changed from 8 to 1 to match with new docs.

- New SNES information source found; fixed partial H-DMA emulation to include

  indirect addressing support.

- Snapshot files are now compressed.

- Compressed ROM images now supported on Linux.

- Snapshot loading and saving added.

- Joystick support for Linux added. One 2, 4 or 6 button joystick, or two 2

  button joysticks supported (PC hardware limitation).

- SVGA full screen support added for Linux. Still has the X11 slow down bug so

  can't blame the X11 server any more! Must be a kernel bug or a very odd

  emulator bug.

- Added emulation of two joy-pads on the PC/Sun keyboard.

- Removed -i command line flag as it is no longer used. -h value range has also

  changed: now 1 - 100 (percentage).

- Actuate cycle counting rather than instruction counting now added including

  fast and slow ROM timing - should give much better timing information when

  line-by-line screen update added.

- Bug fixed old-style joy-pad access used by some ROMs - Mario All Stars still

  gives problems if enabled and I don't know why; but at least Super Bomberman

  now works !

- Looks like if both horizontal and vertical IRQ are enabled then IRQ should

  only be triggered once per frame and not once per scan line - looking at the

  IRQ handler of a couple of ROMs seems to confirm this.

- Added initial cycle counting - not accurate enough for some ROMs though.

- Finally worked out how the odd VRAM address increments should work but only

  found one ROM, so far, that actually uses it.

- Debugged the odd slow down problem with the Linux port - it seems to be a

  bug in the X Window System server - starve the X server of keyboard presses

  or mouse clicks or movement and the X server slows down, slowing down the

  emulator with it !

0.4 released

- Fixed sprite vertical clipping at top of screen.

- No need to invert the Mode 7 transformation matrix before use - the

  ROM coder already had to!

- Fixed Mode 7 scrolling offset when using special effects.

- Added Mode 7 rotation, enlargement and reduction emulation.

- DMA shouldn't zero the byte count value after a DMA has completed.

- Added DMA reading (Addams Family was using it)

- Fixed V-RAM read function - returned data should lag behind the V-RAM

  address by one byte/word.

- Added mode 7 graphics only.

0.3 released

- Speeded up the main CPU loop a bit.

- Add more command line options:

  -f <frame skip> (default 1)

  -i <no instructions between polling X> (default 32768)

  -h <number instructions per scan line> (default 45, some games allow a lower

 setting resulting in a increased

 emulated frame rate)

  -t enable CPU tracing

  -ss <sound CPU skip wait method> (default 0, more methods to be added)

  -H disable H-DMA emulation

  -F Force Hi-ROM memory map

- Modified planar to chunky conversion to use look up tables.

- But now Mario All Stars won't start. Made emulation of $4016 optional with

  -o command line switch.

- Thanks to Carlos (calb) of ESNES fame, I've added correct $4016 & $4017

  joy-pad register processing - now several more ROMs will start once a

  button is pressed and can be controlled.

- DMA wasn't updating DMA registers with the final CPU address used after the

  DMA had completed (caused sprite and background corruption with some ROMs).

  Still suspect another DMA side effect isn't being emulated correctly though.

- Fixed setting of CPU overflow flag in ADC and SBC instructions in decimal


- Fixed MVP/MVN CPU instructions to leave X and Y values correct at end of

  loop - several more ROMs now work. Still don't know if MVP/MVN instructions

  should ignore the accumulator size flag or not.

- Rewrote background drawing code - gives a large increase in speed.

- Flag to only update X Windows colour palette when necessary was missing a

  case - caused some ROMs to start with a black screen.

- Code to only update background tiles when changed wasn't working so I

  disabled it.

- CPU WAI instruction needed to trigger on hardware IRQ even when interrupt

  enable flag was false.

- DMA was not transferring 65536 bytes when byte count was 0.

- Fixed matrix 16bit x 8bit multiplication (old debug code was causing junk

  value to be returned).

- Fixed Makefile so version.h header file change recompiles file that shows

  version number in window title.

- Added more reporting of used but unimplemented missing hardware features to

  debug command.

- New ROM loading code from Jerremy included, can now cope with ROM images

  with no 512 byte header.

- Speeded up emulated memory access a little bit.

0.2 released

- Added matrix 16bit x 8bit multiplication for Super Off-Road Racer.

- Added initial H-DMA emulation - visual effects using it will not be seen

  correctly until screen is updated line-by-line rather than the whole screen

  at end-of-frame.

- Fixed horizontal sprite clipping (vertical clipping still has a problem).

- Integrated large sprite bug fixes and new background drawing code from


- Fixed large size per-sprite flag; always stayed true after sprite size was

  changed to large.

- Rewrote the planar to chunky pixel conversion routines (still need more


- Made registers $4016 & $4017 always return $ff - lots of ROMs that previously

  wouldn't go beyond the title screen thought old-style joy-pads were

  connected and were waiting for the user to press a button on them.

- Frame skip rate now set to 1 instead of 5 on my P166 laptop!

- Fixed NMI v-blank flag being incorrect set, caused some ROMs to lock.

- X keyboard autorepeat now switched off when emulator has keyboard focus.

- Added number key options to toggle backgrounds 1 to 4 and objs (sprites) on

  and off.

- Fixed sprite clipping problems at edge of left hand side of screen.

- Corrected Hi-ROM memory map (I think) (no I didn't)

- Fixed most of the sprite-to-sprite priority problems.

- Added sprite debug command, 'S'.

- Added a debug command to show what missing hardware features a ROM was using.

- Added horizontal and vertical beam position IRQ - horizontal always triggers

  at start of line at the moment.

- Fixed SBC instruction to set carry flag the correct way around.

Initial release 0.1

- Ported Windows 95 version of Snes96 to Linux on a PC and Solaris on a


- Corrected work RAM memory map.

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