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ChangeLog
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-- 1.29.0: --
January 12, 2022:
PCE, PCE-Fast: Initialize VCE color table memory at power-on to roughly(without probabilistic bit randomness) match test results from a
PC Engine Duo instead of just zeroing it; fixes unreadable letters in the password entry screen of "Order of the Griffon".
Added test for potential splatting-related bug in qemu's PPC64 VSX "xscvdpsp" instruction emulation that messes up OwlResampler when compiled with gcc.
January 11, 2022:
PCE: Added patch in the "notes" subdir for extending the upper range of the "pce.slend" setting to 241(not applied in Mednafen due to increasing
the probability of an extra 8ms of input lag with some games).
January 9, 2022:
VB: Fixed a couple inaccuracies in the VSU modulation emulation, fixing a few sound effects in "Virtual Boy Wario Land".
January 7, 2022:
SNES-Faust: Fixed S-DSP pitch modulation being half as strong as it should be.
December 29, 2021:
SNES: Fixed wrong compile-time endian detection on little-endian PPC64.
December 24, 2021:
PCE: Fixed incomplete initialization of the VDC BG tile cache; fixes glitches after the boss explodes in "R-Type" under certain
conditions(more likely to occur in forks of Mednafen).
December 20, 2021:
NES: Added missing mapper 90 variables to save states.
December 5, 2021:
Placing a "%d" or "%b" specifier at the beginning of a filesys.fname_* setting format string will now cause the generated path to be used as-is, rather
than potentially being prefixed with the corresponding filesys.path_* setting or the Mednafen base directory. Fixes a regression introduced in
1.28.0-UNSTABLE that caused IPS patch files to be loaded from the wrong location when the user had loaded a game via a relative path.
November 29, 2021:
Added support for playing the SCSP-generated music from most Sega Model 2A, 2B, 2C, and 3 games, via the new experimental "sasplay" module.
November 15, 2021:
SNES: Fixed compilation error for little-endian PPC64 with LTO enabled.
Fixed compilation error after running configure with --disable-fancy-scalers.
-- 1.28.0-UNSTABLE: --
November 7, 2021:
SNES: Updated libco to latest.
November 5, 2021:
Paths included in informational and error messages are now outputted with ASCII control characters non-reversibly transformed by inverting bit 6
and prefixing with a "^" character.
When loading a game from a ZIP archive, the path used within the ZIP archive is now outputted in an informational message.
The paths of CD images specified within M3U files are now outputted in informational messages as they are loaded.
November 3, 2021:
Added support for loading CD images from ZIP archives when the "cd.image_memcache" setting is set to "1".
Implemented an M3U recursion limit of 9, adjustable by the new setting "cd.m3u.recursion_limit".
Implemented a limit of 25 on the total number of CD images loaded while processing M3U files, adjustable via the new setting "cd.m3u.disc_limit".
Implemented a size sanity limit of 65535 bytes for PSF tag source data.
October 28, 2021:
Changed handling of single gzip/Zstd compressed files to treat the .gz/.zst suffix as the second part of the extension, instead of the whole extension,
with respect to Mednafen data file path construction and naming.
Added undocumented setting "filesys.old_gz_naming", that can be set to "1" by the user to restore the old data file naming behavior for gzip-compressed files for
backwards-compatibility reasons.
October 27, 2021:
Added Zstandard decompression support to game loading, with both naked files("zst" extension) and ZIP archives.
October 21, 2021:
SS: Don't send CD data sectors to partition buffers when the disc hasn't gone through the authentication process.
October 19, 2021:
SS: Moved some CDB CD reading variable initialization into StartSeek() to reduce the amount of redundant error-prone code.
SS: Don't erroneously signal CDB EHST HIRQ when ending a TOC or file info data transfer.
October 18, 2021:
SS: Implemented more aspects of the CD block disc authentication process. Fixes abort to CD player screen when trying to start a game demo in
Gremlin Interactive's "Demo Disc".
SS: fixed a few issues with CD block directory reading and handling of directories with more than 256 entries.
October 6, 2021:
SS: Added commented-out partial fix for end-of-level hang in "Loaded".
SS: Changed midsync event time initializing to use SS_SetEventNT() instead of doing it directly(and breaking when the midsync event isn't the last enumerated
event)
SS: Added a dev build event order sanity check to ForceEventUpdates().
October 5, 2021:
SS: Implemented a delay when the SMPC joystick read process is aborted due to time over or due to the Break bit being 1, per tests on a SS, and fixed
timing granularity issues with the processing of the Break/Continue bits; fixes unresponsive input in "Discworld", and abort to CD player screen in the
USA and Europe releases of "Primal Rage".
October 1, 2021:
SS: Added "Senkutsu Katsuryu Taisen: Chaos Seed" to the internal database of games to enable full cache emulation with, to fix the inability to skip
the intro FMV.
An empty string for a setting that expects a numeric value is now rejected instead of being treated as 0.
September 29, 2021:
Misformatted setting file lines are now rejected with an error instead of silently ignored.
September 27, 2021:
SS: Fixed a mistake in an invocation of the SH-2 emulation Branch() macro that caused an expensive debugger function to be called even when the debugger was
not active, hurting performance.
September 26, 2021:
Settings file parsing error messages now include line numbers when relevant.
SS: Removed MDFN_COLD from SH7095::SetDebugMode(), as it causes newer gcc's optimizer to make bad assumptions and place the main CPU execution loop in the
cold text section.
September 25, 2021:
Providing an empty string for a setting that expects an integer or real number will now result in an error, instead of being treated as 0.
Modified the settings code to use the new string<->integer conversion functions, for stricter parsing(nonsense like "0x -0x1" is no longer allowed)
and better error messages in certain cases.
Added new string<->integer utility conversion functions.
September 21, 2021:
SS: Implemented a simple optimization in the VDP1 drawing code, reducing executable size by about 900KB on x86_64 Linux.
Added MDFNI_SaveSettingsCompact(), to be used in the future for settings backups.
September 14, 2021:
Added tests for clamp_to_u8(), clamp_to_u16(), and MDFN_abs64().
Added the MDFN_abs64() function.
Rewrote the sign_*_to_s*() macros and clamp_to_u8/u16() functions.
September 13, 2021:
Added MemoryStream::get_line_mem() function to allow for more efficient parsing of large line-delimited text files.
Added MDFN_memdupstr() function, stuck the guts of the settings handling code in a class, and reworked the settings file loading code
to be a bit faster.
Added inline FileStream::put_char() function, and optimized the settings file saving code.
September 10, 2021:
Reworked how setting generation at startup works a bit to reduce the number of memory allocations, and added setting flags to mark strings
that should be free()'d when MDFNI_Kill()->MDFN_KillSettings() is called at exit, to reduce noise when checking for memory leaks.
Fixed currently-benign memory leak in the FPS display code.
SexyAL: Fixed memory leak in dummy sound driver.
September 9, 2021:
SexyAL: Modified the ALSA driver code to not use a VLA for the noninterleaved multichannel support.
September 8, 2021:
Fixed an instance of undefined behavior in SwiftResampler.
September 7, 2021:
Added a couple more compiler bug/sanity tests.
September 6, 2021:
Rewrote some of the small inline utility functions in CDUtility.h, and added tests for the rewritten utility functions to
ensure correctness and stable semantics.
Added test for gcc bug #97760.
August 28, 2021:
Added crc32_cdrom_edc() function(to be used later), reimplemented crc16_ccitt() with the new generic fast CRC calculation template function,
and added a few CRC calculation sanity tests run at startup.
August 24, 2021:
SS: Fixed an off-by-150 bug in the CDB code, present since the first release with Saturn emulation, that caused the read hinting at the start of emulated
seeks to not have the desired effect.
SS: Implemented emulation of the CDB Scan command.
August 16, 2021:
SS: Optimized the SCSP sound CPU interrupt level calculation code.
August 14, 2021:
SS: Fixed a few inaccuracies in the relative timing of SCSP timer increments across different prescaler rates, per tests on a SS.
August 13, 2021:
SS: Added emulation of the SCSP MIDI interface output logic and approximate timing.
August 10, 2021:
SS: Fixed a few inaccuracies in the relative timing of SCSP EG level updates across different rates, per tests on a SS.
July 21, 2021:
Typedef signed char and unsigned char to int8 and uint8 respectively, instead of relying on int8_t and uint8_t, in case they're ever
implemented without the aliasing properties of char types, which Mednafen code relies on.
July 17, 2021:
SS: When a CDB seek is started very shortly after another seek, don't elide the previous seek's startup side effects; fixes the CD audio player in
the North America/Europe BIOS, which broke with 1.26.0-UNSTABLE.
Compile with -Wstack-usage=32768 to check for excessive stack usage in functions.
July 15, 2021:
VB: Added "left" and "right" options to the "vb.3dmode" setting, to allow for more easily showing only the left or right view.
July 11, 2021:
Added setting "video.cursorvis", to control the window manager default cursor visibility.
June 26, 2021:
Use AtomicFIFO for the main thread->emulation thread event queue, and fixed related excessive(100+ KB) stack usage in a couple functions.
June 20, 2021:
SS: Added "Saturn Super Vol. 2" to the internal database of games to use the data cache read bypass kludge with, to fix the flickering title
screen in the "Golden Axe: The Duel" demo.
SS: The VA0/VA1 motherboard's memory mapping behavior for Low-RAM is now emulated instead of VA2's, to fix a crash in "Myst" in the generator room.
SS: The emulated reset button mapped to Mednafen's reset command key(F10 default) will now respect the "ckdelay" setting.
Added a quick configure script test to check if disabling PIC/PIE breaks the compiler/linker, and if it does, PIC/PIE is not disabled,
to prevent a link-time failure on Haiku.
June 19, 2021:
Use AC_TRY_LINK() instead of AC_TRY_COMPILE() in the configure script test for AVX inline assembly availability, to handle toolchain setups where
the assembler is run at link time instead of compile time.
Added setting "video.force_bbclear", default value of "0", which when set to "1" will force clearing of the backbuffer before drawing every frame.
-- 1.27.1: --
June 4, 2021:
SS: Added "Herc's Adventures" to the internal database of games to enable SH-2 read/write VDP1 draw slowdown with, to fix a few graphical glitches.
May 28, 2021:
Error out in the configure script when iconv is not found, rather than later during compilation.
May 26, 2021:
SNES: Applied untested fix for an issue with libco on PPC64 ELFv2 systems.
May 18, 2021:
SS: Corrected a few inaccuracies in the handling of SCSP EG phase transitions, per tests on a SS.
May 12, 2021:
Renamed intl/VERSION to intl/VERSION.txt to prevent a conflict with a system C++ header file on case-insensitive filesystems(problem introduced in 1.27.0-UNSTABLE).
April 29, 2021:
Demo: Use #pragma(pack) instead of __attribute__((packed)), to work around a bug/design flaw in older versions of gcc that caused the demo module's save
state test to fail when compiled for a Windows target(where ms_struct is the default structure layout).
April 28, 2021:
Increased verbosity of bad Q subchannel data error messages in the CloneCD CD image loader.
Fixed crashing with non-glibc iconv implementations when the user specifies an unsupported character encoding in the debugger's memory editor.
-- 1.27.0-UNSTABLE: --
March 29, 2021:
SS: Corrected threshold and semantics of envelope level-based blocking of slots' access to SCSP RAM, per tests on a SS.
March 13, 2021:
SS: Fixed a big-endian target incompatibility in the SCSP emulation code.
Use ternary operator instead of std::min in endian.h, as doing so somehow causes gcc to produce smaller and faster machine code.
PSX: Removed incorrect filtering of CD-XA ADPCM sectors based on the file and channel numbers of the first ADPCM sector played,
originally added in 0.9.24-WIP to fix the speech playback in "Yarudora Series Vol.1: Double Cast", but made unnecessary by later sector buffering
accuracy improvements; fixes missing audio in the FMVs of "Blue's Clues: Blue's Big Musical".
March 12, 2021:
PSX: Adjusted which sectors are processed and reflected by GetLocP after SeekP completes to only those before the seek target(which is slightly different
than SeekL behavior, which also includes the target and a few after, at least with a typical PS1 CD); fixes hangs at different points in
some versions of "Tomb Raider", a problem initially fixed in 0.9.38.3, but regressed in 1.22.0-UNSTABLE.
March 9, 2021:
VB: Block writes to VSU registers and memories when A0 and A1 are not both 0, per tip from "enthusi".
March 7, 2021:
SS: Implemented incomplete(regarding stack frame data) M68K address error handling, and implemented M68K halting when accessing addresses where any of
A21-A23 is 1. Fixes major audio distortion during boss battles in "Lunar: Silver Star Story" due to SCSP DSP register corruption that occurred when
the game crashed the sound CPU during bootup.
SNES-Faust: Don't call event handlers in read/write handlers if the read/write is from DMA/HDMA, to avoid problematic recursion and related issues.
SNES-Faust: Fixed clearing of pending SuperFX IRQ on reset/power; fixes hang/crash in "Stunt Race FX" upon performing a virtual power toggle after the
game boots up.
March 4, 2021:
SNES-Faust: Added commented-out fix for "Speedy Gonzales", to enable later.
SNES-Faust: Added detection heuristics and support for mapping LoROM RAM into $8000-$FFFF, to fix save game saving/loading in "Light Fantasy",
"PGA Tour Golf", and "Ys III".
February 23, 2021:
SNES-Faust: Added commented-out fix for "Kishin Douji Zenki Tenchi Meidou", to enable on a per-game basis in the future due to a minor negative
performance impact.
February 19, 2021:
SNES-Faust: Reworked cart header detection and cart type detection logic a bit, fixes "Yuuyu no Quiz de Go! Go!".
February 17, 2021:
SNES-Faust: Return open bus in bits 4 through 6 for reads from $4210; fixes early hang in "Super Professional Baseball II".
SNES-Faust: Return open bus in bits 0 through 6 for reads from $4211; fixes early hang in "Yuujin Janjuu Gakuen 2".
SNES-Faust: Added support for special ROM mapping required by "Derby Stallion 96" and "Sound Novel Tsukuru".
February 16, 2021:
SNES-Faust: Changed power-on APU RAM initialization pattern; fixes hangs in "Ihatov Monogatari" and "Kyuuyaku Megami Tensei".
February 3, 2021:
Fixed an off-by-1 error in the multithreaded CD reader that would cause a hang if a read was attempted for the sector at LBA 449849.
January 31, 2021:
Fixed a design flaw that caused the creation of empty backup counter files when automatically attempting to back up a nonvolatile memory save file that
does not exist.
January 28, 2021:
SNES-Faust: Disabled the PPU brightness modulation sanity check when compiling a non-dev build, and fixed array misalignment that was causing the code to
segfault when compiled with stack smashing protection enabled on newer gcc.
January 25, 2021:
Resync console scroll to the last drawn line of the target unwrapped line in the scrollback buffer, not the first, otherwise the console will erroneously
scroll up on windowed<->fullscreen transitions when the last line is wider than the console viewport, confusing the user.
January 24, 2021:
Fixed rendering of Unicode combining characters, fixed handling of combining characters when entering text in the console and debugger prompt, added support
for pasting into the debugger prompt, cleaned up rendering of the debugger prompt box, implemented automatic scrolling when entering text in the debugger prompt,
made console text entry automatic scrolling bidirectional, changed console scrollback buffer beginning/end scroll key combos to CTRL+Home/CTRL+End instead of
SHIFT+Home and SHIFT+End, added support for clearing multiple characters at once in the console and debugger prompts by pressing CTRL with Backspace/Delete.
January 19, 2021:
Added support for reinitializing game controllers while Mednafen is running by pressing Shift+F3.
Aborting the input configuration process for a virtual device will now discard the new configuration data, instead of combining it with the old configuration data
for the not-configured buttons as previously done.
January 12, 2021:
Added "upper_center" and "center" options to the "fps.position" setting.
January 7, 2021:
WonderSwan: Fixed RTC month field being incorrectly treated as 0-based instead of 1-based.
Give the user feedback when they try to toggle a graphics layer that doesn't exist or isn't toggleable.
NGP: Sanitize some sound-related variables on state load to prevent potential memory corruption.
January 6, 2021:
SMS: Sanitize more variables on state load.
NES: Fixed a few instances of missing variable initialization on poweron.
January 5, 2021:
GB: Sanitize a few variables on state load.
January 4, 2021:
Automatically create any missing parent directories to the Mednafen base directory on startup.
Create each Mednafen data directory(e.g. firmware, sav, snaps, etc.) at startup based on the current value of the filesys.path_* setting instead of based on
its default value, unless the corresponding filesys.fname_* setting is not set to its default value, in which case the directory is not created.
January 2, 2021:
NES: Sanitize more sound emulation variables on state load.
January 1, 2021:
NES: Added missing VRC6 variables to save states.
GBA: Backup save game memory files on game load
SMS: Fixed a bug that could cause the emulated reset button state to get stuck as pressed if a hard reset occurred within about 20 frames after a soft reset.
December 31, 2020:
GBA: Added a few missing variables to save states.
GB: Added a few missing variables to save states.
PCE-Fast: Renamed encapsulating namespace from "PCE_Fast" to "MDFN_IEN_PCE_FAST", to match the convention of all other emulation modules.
Made Emulated* MDFNGI objects constant, copied over to a dynamically-allocated MDFNGI assigned to MDFNGameInfo on game load.
December 30, 2020:
Dynamically-allocate QTRecord LZO work memory.
Apple2: Dynamically allocate state helper floppy disk object.
PCE-Fast: Fixed massive overallocation of memory for the VDC background tile cache.
December 29, 2020:
Optimized MDFN_FastArraySet() for non-ideal counts.
Utilized MDFN_HIDE in more places.
December 28, 2020:
Removed incomplete YCbCr MDFN_Surface support unused since 0.9.x, and likely to remain unused.
Added support for 16bpp graphics output to core Mednafen code and the majority of emulation modules(excluding "pce", "pcfx", "psx", "snes", "ss", and "vb"),
and added setting "video.glformat" to allow for using this support with OpenGL.
December 25, 2020:
PSX: Initialize some missed state on reset/poweron.
December 24, 2020:
Completely rewrote the save state preview image resizing code, so that now it's only somewhat wrong, instead of mostly wrong as before.
December 22, 2020:
GB: Use fastcall on 32-bit x86, for a tiny performance boost.
Use MDFN_RESTRICT macro instead of __restrict__.
NGP: Use fastcall calling convention on 32-bit x86 to boost performance a little bit.
Apple2: Disabled some expensive asserts when compiling without MDFN_ENABLE_DEV_BUILD defined.
December 20, 2020:
Birthed pernicious human date/time calculation functions to replace the usage of _gmtime64() and _localtime64() on Windows, for Windows 9x compatibility.
December 14, 2020:
Set icon using Win32 API functions on Windows instead of relying on SDL_SetWindowIcon(), and use alternate, smaller(and boxier!) window icons when running
on Windows 9x so the poor beetle doesn't look splatted.
December 12, 2020:
Don't call SetConsoleOutputCP() on startup on Windows, as it messes up the cmd.exe console on Windows 7(at least) even when Mednafen has exited,
and for Windows 9x compatibility.
Pass a pointer to a dummy variable, instead of NULL, as the output thread identifier pointer argument to _beginthreadex(), for Windows 9x compatibility.
Allow for the absence of GetConsoleWindow() on Windows, for Windows 9x compatibility.
Automatically attempt to lock file offset 0xFFFFFFFF if the attempt to lock offset 0xFFFFFFFFFFFFFFFF fails with an invalid parameter error on Windows,
for Windows 9x compatibility.
Use SetFilePointer(), GetFileSize(), and LockFile() instead of SetFilePointerEx(), GetFileSizeEx(), and LockFileEx() on Windows, for Windows 9x compatibility.
December 10, 2020:
Dropped usage of and dependency on libsndfile, and added a direct dependency on libFLAC. The only CD image audio file formats/encodings other than raw supported
now are: FLAC, Ogg Vorbis, Musepack, and uncompressed PCM in AIFF/AIFC, AU/SND, W64, and WAV.
Require the first four bytes of the tentative Ogg Vorbis file to be "OggS" before calling ov_open_callbacks(), to prevent unnecessary excessive reads when trying
to determine the type of the audio file, and to avoid treating a non-Vorbis file as Vorbis under certain conditions.
Open the main settings file for both reading+writing on startup instead of just reading, to allow file locking to work over NFS, and as a quick check to make
sure the file is writeable before it's too late upon exit.
December 1, 2020:
Made various changes to the Windows support code, to allow for compiling a non-Unicode Windows build.
November 24, 2020:
Implemented stream buffering in the FileStream class, now using read(), write(), etc. instead of fread(), fwrite(), etc.
-- 1.26.1: --
November 8, 2020:
PSX: Fixed various inaccuracies in the SPU reverb emulation code.
PSX: Fixed quasi-benign dereferencing of a null pointer in the GPU code when playing a PSF.
November 3, 2020:
SNES-Faust: Fixed a crash when an MSU1-enabled game tried to play MSU1 audio but no audio tracks existed.
SNES-Faust: Only create MSU1 multithreaded audio reader object if at least one audio track is available.
November 2, 2020:
SNES-Faust: Fixed a design flaw in the MSU1 audio track loading code that broke loading of audio tracks when the game's filename included a "%" character.
November 1, 2020:
SS: Fixed compilation errors after configuring with --disable-debugger.
SS: Fixed compilation errors with clang.
-- 1.26.0-UNSTABLE: --
October 26, 2020:
SS: Added "The Lost World: Jurassic Park" to the internal database of games to enable full cache emulation with, to fix most rock face graphical glitches.
October 25, 2020:
SS: Added "Corpse Killer" to the internal database of games to enable full cache emulation with, to fix the glitchy rotation-zoom effect.
October 24, 2020:
SS: Fixed major bug, existing since Saturn save state support was added, in the SCU save state code that caused wrong state to be saved(and later restored)
when an SCU DMA level in indirect mode was active.
SS: Added "Kaitei Daisensou"/"In the Hunt" to the internal database of games to enable SH-2 read/write VDP1 draw slowdown with, to fix FMV tearing.
SS: Added "Zero Divide" to the internal database of games to use the data cache read bypass kludge with, to fix a graphical glitch with character portraits.
October 23, 2020:
SS: Made changes to prevent the CDB emulation from reporting PLAY status until the second sector is read after a seek completes; fixes game-breaking
problems in "Break Point", "DJ Wars", "Hop Step Idol", and "Tennis Arena".
SS: Fixed inaccuracies with how CDB playback buffer full auto-pause and resume works; fixes occasional hangs of finite duration in "Dragon Force II" and
"World Cup France '98: Road to Win" when trying to skip FMVs.
October 22, 2020:
SS: Added "Mujintou Monogatari R: Futari no Love Love Island" to the internal database of games to use the data cache read bypass kludge with,
to fix glitches when character portrait graphics change.
October 21, 2020:
SS: Added "Doraemon: Nobita to Fukkatsu no Hoshi" to the internal database of games to use the data cache read bypass kludge with,
to fix the blank Game Over screen.
SS: When a CDB 'Get CD Device Connection' command is issued very shortly after a 'Reset Selector' command, the 'Get CD Device Connection' command
will now be executed before the resetting effects of the 'Reset Selector' command occur. Fixes startup hang in the USA version of "Independence Day".
October 20, 2020:
SS: Slowed down emulated VDP1 pixel plotting performance by a bit less than 20%(10% in 8bpp mode); fixes prematurely cut-off voices in "Paneltia Story",
and reduces tearing in "Yu-No".
October 18, 2020:
SS: Added "3D Baseball", "The Crow", "NBA Action", "NFL Quarterback Club 96", "Solar Eclipse", and "Titan Wars" to the internal database of games to
enable full cache emulation with, to fix minor FMV glitches.
SS: Added "Thunder Force Gold Pack 1" to the internal database of games to enable full cache emulation with, to fix the glitchy ship sprite in the ending
of "Thunder Force III".
SS: Added the Europe releases of "Virtua Cop" and "Virtua Cop 2" to the internal database of games to enable full cache emulation with, to fix
startup hangs.
SS: Added "Yu-No" to the internal database of games to enable full cache emulation with, to fix the problem of the intro FMV ending too soon.
SS: Added "Horror Tour" to the internal database of games to enable full cache emulation with, to fix graphical glitches on the save and load screens.
SS: Added "Falcom Classics II" to the internal database of games to enable SH-2 read/write VDP1 draw slowdown with, to fix tearing in the intro FMV of "Ys II".
SS: Added "Tokimeki Memorial: Forever With You" to the internal database of games to enable SH-2 read/write VDP1 draw slowdown with, to fix the glitchy
arm sprite in the Konami intro.
SS: Added "Virtua Fighter Kids" to the internal database of games to use the data cache read bypass kludge with, to fix a major FMV glitch.
October 17, 2020:
SS: Made a very small SSE2-based optimization to the cache tag evaluation code.
October 16, 2020:
SS: Removed incorrect write mirrors for the SH-2 CCR register; fixes FMV glitches in "NFL Quarterback Club 97".
SS: When full cache emulation is enabled(e.g. via database), alternate slave CPU and bus sharing emulation code will be used, to reduce
disproportionate sharing of the bus(it's still not perfect, however).
SS: SH-2 PC-relative MOV.W and MOV.L loads are now correctly treated as instruction fetches instead of data fetches with respect to the
OD/ID bits of CCR.
SS: The SH-2 WB/EX pipeline stall emulation logic is now always enabled, instead of only being enabled in full cache emulation mode as it was previously.
October 12, 2020:
SS: Moved SH-2 cache entry invalid bit from bit31 of the internal combined tag variable to bit0, for slightly better code generation.
October 11, 2020:
SS: Slave SH-2 on/off is now handled outside of the regular event handling system to prevent a crash under certain conditions.
October 9, 2020:
SS: Extended the handling of VDP1 command execution slowdown on SH-2 CPU reads/writes to also include SH-2 DMA accesses.
October 5, 2020:
SS: Bumped up minimum seek timing delay, to compensate for upcoming general CPU timing improvements in the games sensitive to seek timing.
October 4, 2020:
SS: The SR value loaded with RTE is now properly masked.
October 2, 2020:
SS: Allow the SMPC joystick reading process to be aborted earlier on, while still waiting for vblank to end; fixes another hang in "QuoVadis".
SS: Added "Wolf Fang SS: Kuuga 2001" to the internal database of games to enable SH-2 CPU read/write VDP1 draw slowdown with, to
fix glitchy graphics in the player's robot.
SS: Added "Mahjong Doukyuusei Special" to the internal database of games to use the data cache read bypass kludge with, to fix the missing
background graphics layer on disc 2.
SS: Added "Kidou Senkan Nadesico: Yappari Saigo wa Ai ga Katsu" to the internal database of games to use full cache emulation with, to fix a hang.
SS: Implemented emulation of the timing effects of the B-bus write buffer on SH-2 CPU writes; fixes hang in "QuoVadis".
September 4, 2020:
SNES-Faust: Fixed bug in the multithreaded PPU renderer that could cause massive graphics corruption when a game interleaves reads and writes to
VRAM without resetting the VRAM address, like in "NBA Pro Basketball: Bulls vs Blazers".
August 28, 2020:
SS: Delay CDB status position info update by about 44us after a seek request(via Play command, or otherwise); fixes missing graphics in
the intro of "Magical Drop 3".
-- 1.25.0-UNSTABLE: --
June 27, 2020:
SS: Implemented more accurate emulation of VDP1 drawing of excessively-large primitives.
It's not perfect, there's still something weird going on with antialiasing, and the effects on gradient shading
and texturing are not fully emulated, but it's enough to fix missing graphics in the attract mode of "Virtua Cop",
and a hang after defeating the final boss in "Rayman".
SS: Fixed an off-by-1 inaccuracy in the edge stepping code for sprites and polygons, with minor visible effects in
non-rectangular sprites/polygons.
June 26, 2020:
SS, MD: Fixed/Implemented M68K MULU and MULS instruction timing.
June 24, 2020:
SS: Added wait states to M68K writes; fixes hang in "Lunar" after the Meribia pub singer's singing, that was caused by a timer being
reloaded too quickly in an interrupt handler.
June 13, 2020:
SS: Allow VDP1 primitive drawing code to be suspended(and later resumed) mid-drawing when it's consumed too much emulated time; fixes excessive CPU usage during
the FMV in "Dark Seed II".
June 4, 2020:
SS: Added "Senken Kigyouden", "Xian Jian Qi Xia Zhuan", "Virtua Fighter", and "Virtua Fighter Remix" to the internal database of games to
enable full cache emulation with, to fix graphical glitches.
May 17, 2020:
SS: Implemented more complete emulation of SCSP's buggy(inter-slot contamination) linear interpolation on FM carrier slots.
-- 1.24.3: --
May 1, 2020:
SS: Implemented more complete emulation of the SCSP short waveform mode, after running further tests; fixes excessive distortion in a
sound effect in "Sega Ages: OutRun", a regression introduced in Mednafen 1.24.2.
-- 1.24.2: --
April 25, 2020:
Fixed broken support for systems without any usable OpenGL implementation available.
April 24, 2020:
Apple2: Adjust disk angle variable upon disk change, partially sanitize the disk angle variable on state load, and print out a debug error
message instead of triggering an assert() in the disk reading code, to prevent Mednafen from aborting out in certain circumstances involving disk
changing and state loading.
April 21, 2020:
Apple2: Added missing keyboard reading variable to save states.
April 7, 2020:
SS: Fixed a few inaccuracies with the SCSP waveform loop handling.
April 6, 2020:
SS: Added emulation of SCSP slot short waveform mode bit.
April 5, 2020:
SS: Implemented the buggy linear interpolation that occurs on the SCSP when FM is used.
April 3, 2020:
SS: Added emulation of SCSP slot EG bypass bit.
SS: Implemented SCSP register mirroring.
-- 1.24.1: --
February 27, 2020:
NES: Changed some macros in the CPU emulation code to not have leading underscores.
February 25, 2020:
Use sem_clockwait() or sem_clockwait_np() when available, instead of sem_timedwait().
NES: Don't memset() MDFN_PixelFormat object.
February 23, 2020:
Fixed build errors on FreeBSD relating to the multithreading code.
February 22, 2020:
Fixed broken semaphore emulation code used on non-Windows platforms when sem_timedwait() is not available(1.24.0-UNSTABLE regression).
February 15, 2020:
Altered Linux joystick API detection in the configure script, to avoid compiling with Linux joystick support in lieu of SDL joystick support on *BSD systems
with Linux header files installed.
February 11, 2020:
Fixed AltiVec-related build errors on 64-bit POWER/PPC.
SS: Added kludges to fix NBG2/NBG3 background layer offset problems in "Fighters Megamix".
February 2, 2020:
SNES-Faust: Replaced assert() in the DSP-1 emulation code with a SNES_DBG()
January 23, 2020:
PSX: Implemented a partial fix for missing notes/instruments in the music of "Dragon Ball GT: Final Bout".
December 30, 2019:
PSX: Don't ignore the sample loop address set via ADPCM header when the loop address register was written only before the end of voice on startup delay.
Fixes sound effect glitches in "Re-Loaded: The Hardcore Sequel".
-- 1.24.0-UNSTABLE: --
December 19, 2019:
PSX: Handle SPU CD volume as signed 16-bit instead of unsigned; fixes lowest volume setting in "Star Wars Dark Forces".
December 18, 2019:
PSX: Tweaked PAL pixel aspect ratio, tweaked nominal FPS values, added setting "psx.correct_aspect", and fixed light gun Y positioning with PAL games.
December 16, 2019:
SNES-Faust: Added SDD-1 emulation.
November 26, 2019:
SNES-Faust: Allow emulation to switch away from the SPC700 during execution of opcode 0xFA, between the read and write, to fix bonkers
audio that leads to a hang in the "Tenshi no Uta" game.
SNES-Faust: Extended DMA NMI delay kludge to cover 8-bit LDX #imm to fix hang in "Frisky Tom" in "Nichibutsu Arcade Classics".
SNES-Faust: Added DSP-2 emulation.
November 19, 2019:
SNES-Faust: Added MSU1 support.
SNES-Faust: Added a multithreaded PPU renderer, controlled via the new "snes_faust.renderer" setting, disabled by default.
SNES-Faust: Added SuperFX overclocking support, controlled via setting "snes_faust.superfx.clock_rate".
SNES-Faust: Added SuperFX instruction cache emulation support, controlled via setting "snes_faust.superfx.icache", disabled by default.
SNES-Faust: Added support for Game Genie cheats(entered via Mednafen's cheat system).
SNES-Faust: Added setting "snes_faust.region" to allow for overriding the automatic region detection and emulating one region while reporting the different region to the game.
November 17, 2019:
On Windows, call CoInitializeEx() with COINIT_MULTITHREADED before calling SDL_Init(), to prevent potential initialization errors with Mednafen's
WASAPI sound code.
November 16, 2019:
Using drive-relative paths on Windows should no longer make a mess due to Mednafen looking for and putting files in the wrong place.
November 14, 2019:
SS: Removed "ss.midsync" setting; the functionality it controlled is now always enabled.
Added settings "affinity.cd", "affinity.emu", "affinity.video", and "ss.affinity.vdp2" to specify CPU thread affinity masks for the CD read threads,
main emulation thread, video blitting thread, and Saturn VDP2 rendering thread, respectively. Setting thread affinities properly can improve
Saturn emulation performance on a dual-core CPU with hyperthreading.
Cleaned up multithreading code and API.
November 10, 2019:
Removed "using namespace Mednafen;" from types.h, and related changes.
October 25, 2019:
SNES-Faust: Ignore frameskip if interlace mode is enabled, to avoid feeding uninitialized data into the deinterlacer which leads to a crash.
September 18, 2019:
Implemented workaround in OwlResampler_neon.inc for a C++ parsing bug in gcc 9.x.
September 13, 2019:
Apple2: Renamed(with backwards-compatibility aliases) video mode "rgb_alt1" to "rgb_alt" and "rgb_alt2" to "rgb_alt_tfr", and added new video mode "rgb_tfr".
Apple2: Added support for 32-color custom palettes(will automatically enable a text fringe reduction RGB mode if used).
-- 1.23.0-UNSTABLE: --
August 26, 2019:
Apple2: Added support for an RGB-style video mode, selectable with the new setting "apple2.video.mode".
SS: Added "Shunsai" to the internal database of games to use the data cache read bypass kludge with, to fix various graphical glitches.
August 25, 2019:
Expanded and harmonized the accepted value ranges for settings "sfspeed" and "ffspeed" to 0.25 through 15, for greater versatility.
NGP: Added very incomplete emulation of BIOS system call "VECT_FLASHERS", per tip from stellarporter. Fixes eventual hang in "The Last Blade".
NGP: Fixed TLCS-900H new IFF calculation when taking an interrupt, per tip from trinemark. Fixes broken voice playback in
"Densetsu no Ogre Battle Gaiden".
NGP: Fixed potential division by zero in the TLCS-900H MINC* and MDEC* instructions emulation(the emulation of the instructions is still almost certainly wrong,
though), per tip from byuu.
August 24, 2019:
PCE: Changed the Super CD-ROM^2 memory identification signature to match a Duo instead of a PCE with a system card, to fix compatibility
issues with some US Super CD-ROM^2 games when using a US system card image, per tip from elmer.
August 22, 2019:
SS: Added "Ronde" to the internal database of games to use the data cache read bypass kludge with, to fix missing graphics
on the title screen and main menu.
August 20, 2019:
SS: Added "Thunder Force Gold Pack 1" to the internal database of games to use the data cache read bypass kludge with,
to fix explosion graphic glitches in "Thunder Force III".
SS: Fixed a bug that could cause erroneous VDP1 framebuffer erasure when the lower Y coordinate for the erase window was too large.
August 12, 2019:
SS: Added "Thunder Force Gold Pack 2" to the internal database of games to use the data cache read bypass kludge with,
to fix quasi-random hangs when pausing the game in "Thunder Force AC".
SS: Corrected the value the SCU DMA mode registers are initialized to on reset.
June 18, 2019:
SS: Added "Formula Grand Prix - Team Unei Simulation" to the internal database of games to use the data cache read bypass kludge with,
to fix a hang after the title screen.
SS: Added "Virtual Mahjong" to the internal database of games to use the data cache read bypass kludge with, to fix graphical glitches on the character
select screen.
June 16, 2019:
SS: Slowed down SCU DMA from SDRAM/SH-2 bus slightly, though I'm not sure what is the origin of the measured overhead/slowdown on a Saturn.
Fixes FMV flickering in "Lunar".
SS: Added partial emulation(CS0 and CS1, SH-2 non-DMA accesses and SCU DMA accesses) of the timing effects of the SCU A-bus configuration registers.
SS: Added "Tech Saturn 1997.6" to the internal database of games for which 1MiB RAM cart emulation is enabled, for its "Groove on Fight" demo.
SS: Implemented a crude simulation of the VDP1 command execution slowdown that occurs when an SH-2 CPU writes to VDP1 RAM or registers, activated
via the horrible hacks mechanism; fixes text flickering in "Arcade's Greatest Hits", most rescue text flickering in "Burning Rangers"(at least on the first stage),
graphical glitches in "Whizz", and some of the graphical glitches in "All-Star Baseball 97".
SS: Added a horrible hack to fix the hang in "Fighters Megamix" that occurred after the intro FMV played(or was interrupted).
SS: Added a horrible hack to fix the hang at the end of disc 1 of "Grandia".
SS: Added a per-game horrible hacks mechanism.
SS: Added "Albert Odyssey" to the internal database of games to use full cache emulation with, to fix battle text truncation.
SS: Added "Die Hard Trilogy", "GeGeGe no Kitarou", "Nobunaga no Yabou Shouseiroku", "Space Jam" to the internal database of games to use full
cache emulation with, to fix hangs/crashes.
SS: Added "Gex" and "Slam 'n Jam 96" to the internal database of games to use full cache emulation with, to fix minor FMV glitches.
SS: Added "Policenauts" to the internal database of games to use full cache emulation with, to fix screen flickering on disc 2.
SS: Full cache emulation(enabled via database) now also enables emulation of SH-2 WB/EX pipeline stalls.
SS: Tweaked the kludgey CPU instruction read/write penalty during SH-2 DMA to be higher in some circumstances; fixes major graphical glitches in the
later stages of "Shienryu" when on arcade mode.
SS: Added "Dragon Force II" to the internal database of games to use the data cache read bypass kludge with, to fix major game logic errors
during battles.
March 15, 2019:
SNES-Faust: Added CX4, SuperFX, and SA-1 emulation.
SNES-Faust: Made various changes to try to improve game compatibility.
-- 1.22.2: --
April 23, 2019:
PSX: Fixed a regression introduced in 1.22.0-UNSTABLE that broke a few PS1 games(e.g. SimCity 2000 and Rise 2).
Fixed issues with inline functions in the QuickLZ code that could cause linker errors when compiling with optimizations disabled.
April 14, 2019:
Apple2: Added basic WOZ 2.0 disk image support.
April 13, 2019:
NGP: Fixed a sequence point rule violation that could cause "Gals' Fighters" to malfunction when Mednafen was compiled with clang,
per tip from stellarporter.
SS: Added the European release of "Theme Park" to the internal database of games to use the data cache read bypass kludge with,
to fix a crash/hang during the intro FMV.
Lynx: Fixed an old heap buffer overflow bug that could be triggered if the emulated game set up registers and RAM in a
certain way.
March 18, 2019:
PCE: Fixed an old bug(looks like from around a decade ago) in the HES playback code; it caused periodic high IRQ latency,
which resulted in timer IRQ-driven DDA playback sounding rougher than it should have.
-- 1.22.1: --
January 27, 2019:
Changed the default sound device for the OpenBSD sound driver from "/dev/audio" to "/dev/audio0".
January 26, 2019:
Semaphores are now implemented with condition variables and mutexes when compiling against a POSIX threads implementation without sem_timedwait().
January 23, 2019:
PC-FX: Replaced old RAINBOW IDCT code with newly-written code.
January 20, 2019:
Some hotkeys in the debugger's memory editor weren't being ignored properly when in text entry mode; fixed. (Regression introduced in 1.21.0-UNSTABLE)
January 1, 2019:
Apple2: Corrected minimum allowed value for the "apple2.video.mono_lumafilter" setting(was -2 when it should have been -3).
SS: Corrected line-scroll handling in double-density interlaced mode with non-zero LSS; fixes broken background graphics effect in Dural's stage in "Virtua Fighter 2".
SS: Added "Linkle Liver Story" to the internal database of games to use the data cache read bypass kludge with, to fix a crash/hang when going to the world map.
-- 1.22.0-UNSTABLE: --
December 11, 2018:
SS: Added support for directly loading <= 1MiB bootable cart ROM images, with the expected file extension being "ss", for debugging and testing
purposes.
December 2, 2018:
SS: Added "Fighting Vipers" to the internal database of games to use the data cache read bypass kludge with, to fix the problem of the
computer-controlled opponent sometimes losing the will to not be a statue.
December 1, 2018:
PSX: Memory cards are now backed up on startup(maximum number of backup copies kept for each memory card is 5).
November 30, 2018:
PCE: Increased CD read startup delay per tip from dshadoff. Fixes ADPCM voice playback issues in "Downtown Nekketsu Monogatari" when text
speed is set to fast.
MD: Fixed a few errors in the internal automatic multitap database, per tip from clobber.
SS: Added setting "ss.cart.auto_default".
NES: Removed apparently erroneous iNES header correction database entry for "Dragon Quest II" that was breaking the game.
November 6, 2018:
VB: Added the ability to toggle the state of the low battery sensor bit; configure the device on virtual input port 2(e.g. ALT+SHIFT+2) to assign a
key/button to this function.
November 4, 2018:
PSX: Added a pseudorandom component to Pause command timing to address loading-related hangs in "Colony Wars - Vengeance (Europe)"
and "Army Men - Air Attack (Europe)".
PSX: Generate a seek error if the tray is opened while the CD drive is not stopped; fixes broken disc switching in "Arc the Lad III".
November 3, 2018:
PSX: Improved emulation of the behavior of CDC command 0x0A per tests on a PS1; fixes hang in "Goryuujin Electro".
November 2, 2018:
PSX: Don't set the autopause track test value unless autopause is enabled; fixes missing music in "Pitball".
PSX: Delay first CD-DA report after playback begins, per tests on a PS1; fixes missing music in "Roswell Conspiracies - Aliens, Myths & Legends".
October 31, 2018:
PSX: Improved timing of CDC command 0x0A per tests on a PS1; fixes missing music and hangs in "Grind Session".
PSX: Altered seek and pause timing and behavior per tests on a PS1; fixes hangs in "Incredible Crisis", "Ballerburg - Castle Chaos", "Transformers - Beast Wars Transmetals",
and "Simple 1500 Series Vol. 057 - The Maze".
October 28, 2018:
The settings management code will now throw an exception if a floating-point setting is NaN.
Fixed a crash that occurred when "debugger.autostepmode" was set to "1" and a game was loaded for a system for which debugger functionality was not implemented.
NativeVFS, FileStream, and GZFileStream methods taking a path will now throw an error when the path contains a null character.
October 23, 2018:
SNES-Faust: Added recognition of files with "fig" and "swc" file extensions as SNES ROM images.
October 9, 2018:
Altered the variants of MDFN_rtrim(), MDFN_ltrim(), MDFN_trim(), MDFN_zapctrlchars(), MDFN_strazlower(), MDFN_strazupper(), and UTF8_sanitize()
that operate on a mutable std::string to take a pointer to the std::string instead of a non-const reference, and added variants that take a const std::string
reference and return a std::string result.
October 8, 2018:
Dropped support for "game set" hashes used to change the naming of save state and save game files. The feature was mostly broken by changes made years ago,
and is redundant now with M3U support. Save game files for multi-disc PC-FX games created in previous versions of Mednafen will need to be renamed to be
seen by this and newer versions of Mednafen. Other files, including save states, should generally be unaffected, unless the user has changed filesys.fname_*
settings to use the %F specifier where they wouldn't by default.
Removed usage of the deprecated "register" keyword in some old code.
October 7, 2018:
Adjusted placement of MDFN_FASTCALL and NO_INLINE to fix some compilation errors with MSVC.
In addition to nonvolatile memory backup files as before, any missing directories in the file path for input-recording movies, save states, screen snapshots, and
nonvolatile memory files are now created as necessary, to increase the versatility of the filesys.fname_* settings.
October 6, 2018:
Implemented partial virtual filesystem support via classes VirtualFS, NativeVFS, and ZIPReader.
Emulation modules' loading of files referenced from the main file being loaded is now done through its associated VFS. This does create a
small backwards-compatibility issue with PSF-family(PSF, SSF, GSF, etc.) files, in that previously a ZIP'd PSF-family file that referenced
a library file would have the referenced file loaded from the directory containing the ZIP file, but now will
have it loaded from within the same ZIP file.
October 4, 2018:
NGP: Replaced min/max macros with usage of std::min/std::max.
September 30, 2018:
Modified usage of std::swap in OwlResampler.cpp to not explicitly(and unnecessarily) specify the template argument, to fix a compilation error on MSVC.
Reworked FileStream.cpp to fix some issues causing errors on MSVC.
GBA: Fixed a regression introduced in 0.9.47 that partially broke compatibility with save states created in previous versions(< 0.9.47), while
preserving compatibility for save states created in versions between and including 0.9.47 and 1.21.3.
September 29, 2018:
SNES-Faust: Added RAM cheat support(main WRAM only for now).
SNES-Faust: Added emulation of PPU-area open bus/bus read latches; fixes missing sprites in the water stage of "Mario's Time Machine".
SNES-Faust: Corrected H/V latch reading to use two separate high/low byte toggles.
September 24, 2018:
SNES-Faust: Made minor changes to the CPU emulation core to not require computed goto support in the compiler.
September 23, 2018:
Added "blend" and "blend_rg" deinterlacers.
Moved multithreading management code into the core.
Encapsulated most(ish) core Mednafen code in the "Mednafen" namespace.
Slightly improved the quality of audio output by SwiftResampler when running at the higher quality settings.
September 22, 2018:
Moved NES audio resampler so it can be used by any emulation module, and renamed it to "SwiftResampler".
Added an SSE intrinsics-utilizing MAC loop to OwlResampler as a fallback(for the inline assembly) when compiling with MSVC.
Added an SSE2 intrinsics-utilizing MAC loop to SwiftResampler as a fallback(for the inline assembly) when compiling with MSVC.
September 21, 2018:
Wrote new Kaiser-windowed sinc generation code, and modified OwlResampler and the NES resampler to use it. It shouldn't have any particularly noticeable end-user
effects, other than slightly different startup performance(assuming no mistakes were made :p).
September 11, 2018:
SS: Emulated input devices' internal states were not being reset on virtual power toggle; fixed.
September 5, 2018:
SS: Reorganized SCSP DSP emulation code to make the lifetime of variables clearer, for a possible x86_64 dynarec in the future.
August 30, 2018:
Modified SHA-256 hashing code to allow for piecemeal hashing of data, instead of requiring the hash to be generated from one contiguous
chunk of memory.