1.56.1

Small hot-fix release. See release notes for 1.56.

- 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)
  3.
- GTK+: Don't resize code and description field in GTK+ 2.  (BearOso)

1.56

Note for GTK+ port packagers: OpenGL support now requires libepoxy, joystick support requires SDL 2.0, not 1.2, and the default GTK+ version selected by configure is now 3 instead of 2.

- 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)
  frames.
- 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)
  translation.
- 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)
  Punch-Out.
- 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)

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)
  files.
• 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)

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)

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)

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)

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)

1.52fix4

Tag commit as 1.52fix4